diff options
Diffstat (limited to 'drivers/i2c/busses')
69 files changed, 4168 insertions, 1100 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index e9df4612b7eb..a3725de92384 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -22,7 +22,7 @@ config I2C_ALI1535 config I2C_ALI1563 tristate "ALI 1563" - depends on PCI && EXPERIMENTAL + depends on PCI help If you say yes to this option, support will be included for the SMB Host controller on Acer Labs Inc. (ALI) M1563 South Bridges. The SMB @@ -56,7 +56,7 @@ config I2C_AMD756 config I2C_AMD756_S4882 tristate "SMBus multiplexing on the Tyan S4882" - depends on I2C_AMD756 && X86 && EXPERIMENTAL + depends on I2C_AMD756 && X86 help Enabling this option will add specific SMBus support for the Tyan S4882 motherboard. On this 4-CPU board, the SMBus is multiplexed @@ -106,6 +106,8 @@ config I2C_I801 Panther Point (PCH) Lynx Point (PCH) Lynx Point-LP (PCH) + Avoton (SOC) + Wellsburg (PCH) This driver can also be built as a module. If so, the module will be called i2c-i801. @@ -121,6 +123,16 @@ config I2C_ISCH This driver can also be built as a module. If so, the module will be called i2c-isch. +config I2C_ISMT + tristate "Intel iSMT SMBus Controller" + depends on PCI && X86 + help + If you say yes to this option, support will be included for the Intel + iSMT SMBus host controller interface. + + This driver can also be built as a module. If so, the module will be + called i2c-ismt. + config I2C_PIIX4 tristate "Intel PIIX4 and compatible (ATI/AMD/Serverworks/Broadcom/SMSC)" depends on PCI @@ -164,7 +176,7 @@ config I2C_NFORCE2 config I2C_NFORCE2_S4985 tristate "SMBus multiplexing on the Tyan S4985" - depends on I2C_NFORCE2 && X86 && EXPERIMENTAL + depends on I2C_NFORCE2 && X86 help Enabling this option will add specific SMBus support for the Tyan S4985 motherboard. On this 4-CPU board, the SMBus is multiplexed @@ -186,11 +198,11 @@ config I2C_SIS5595 will be called i2c-sis5595. config I2C_SIS630 - tristate "SiS 630/730" + tristate "SiS 630/730/964" depends on PCI help If you say yes to this option, support will be included for the - SiS630 and SiS730 SMBus (a subset of I2C) interface. + SiS630, SiS730 and SiS964 SMBus (a subset of I2C) interface. This driver can also be built as a module. If so, the module will be called i2c-sis630. @@ -215,7 +227,7 @@ config I2C_SIS96X config I2C_VIA tristate "VIA VT82C586B" - depends on PCI && EXPERIMENTAL + depends on PCI select I2C_ALGOBIT help If you say yes to this option, support will be included for the VIA @@ -267,7 +279,7 @@ comment "Mac SMBus host controller drivers" config I2C_HYDRA tristate "CHRP Apple Hydra Mac I/O I2C interface" - depends on PCI && PPC_CHRP && EXPERIMENTAL + depends on PCI && PPC_CHRP select I2C_ALGOBIT help This supports the use of the I2C interface in the Apple Hydra Mac @@ -293,7 +305,7 @@ comment "I2C system bus drivers (mostly embedded / system-on-chip)" config I2C_AT91 tristate "Atmel AT91 I2C Two-Wire interface (TWI)" - depends on ARCH_AT91 && EXPERIMENTAL + depends on ARCH_AT91 help This supports the use of the I2C interface on Atmel AT91 processors. @@ -319,6 +331,18 @@ config I2C_AU1550 This driver can also be built as a module. If so, the module will be called i2c-au1550. +config I2C_BCM2835 + tristate "Broadcom BCM2835 I2C controller" + depends on ARCH_BCM2835 + help + If you say yes to this option, support will be included for the + BCM2835 I2C controller. + + If you don't know what to do here, say N. + + This support is also available as a module. If so, the module + will be called i2c-bcm2835. + config I2C_BLACKFIN_TWI tristate "Blackfin TWI I2C support" depends on BLACKFIN @@ -337,6 +361,16 @@ config I2C_BLACKFIN_TWI_CLK_KHZ help The unit of the TWI clock is kHz. +config I2C_CBUS_GPIO + tristate "CBUS I2C driver" + depends on GENERIC_GPIO + help + Support for CBUS access using I2C API. Mostly relevant for Nokia + Internet Tablets (770, N800 and N810). + + This driver can also be built as a module. If so, the module + will be called i2c-cbus-gpio. + config I2C_CPM tristate "Freescale CPM1 or CPM2 (MPC8xx/826x)" depends on (CPM1 || CPM2) && OF_I2C @@ -509,7 +543,6 @@ config I2C_NUC900 config I2C_OCORES tristate "OpenCores I2C Controller" - depends on EXPERIMENTAL help If you say yes to this option, support will be included for the OpenCores I2C controller. For details see @@ -702,7 +735,7 @@ config I2C_OCTEON config I2C_XILINX tristate "Xilinx I2C Controller" - depends on EXPERIMENTAL && HAS_IOMEM + depends on HAS_IOMEM help If you say yes to this option, support will be included for the Xilinx I2C controller. @@ -793,7 +826,7 @@ config I2C_PARPORT_LIGHT config I2C_TAOS_EVM tristate "TAOS evaluation module" - depends on EXPERIMENTAL + depends on TTY select SERIO select SERIO_SERPORT default n @@ -818,6 +851,16 @@ config I2C_TINY_USB This driver can also be built as a module. If so, the module will be called i2c-tiny-usb. +config I2C_VIPERBOARD + tristate "Viperboard I2C master support" + depends on MFD_VIPERBOARD && USB + help + Say yes here to access the I2C part of the Nano River + Technologies Viperboard as I2C master. + See viperboard API specification and Nano + River Tech's viperboard.h for detailed meaning + of the module parameters. + comment "Other I2C/SMBus bus drivers" config I2C_ACORN diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 395b516ffa08..8f4fc23b85b1 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_I2C_AMD756_S4882) += i2c-amd756-s4882.o obj-$(CONFIG_I2C_AMD8111) += i2c-amd8111.o obj-$(CONFIG_I2C_I801) += i2c-i801.o obj-$(CONFIG_I2C_ISCH) += i2c-isch.o +obj-$(CONFIG_I2C_ISMT) += i2c-ismt.o obj-$(CONFIG_I2C_NFORCE2) += i2c-nforce2.o obj-$(CONFIG_I2C_NFORCE2_S4985) += i2c-nforce2-s4985.o obj-$(CONFIG_I2C_PIIX4) += i2c-piix4.o @@ -30,7 +31,9 @@ obj-$(CONFIG_I2C_POWERMAC) += i2c-powermac.o # Embedded system I2C/SMBus host controller drivers obj-$(CONFIG_I2C_AT91) += i2c-at91.o obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o +obj-$(CONFIG_I2C_BCM2835) += i2c-bcm2835.o obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o +obj-$(CONFIG_I2C_CBUS_GPIO) += i2c-cbus-gpio.o obj-$(CONFIG_I2C_CPM) += i2c-cpm.o obj-$(CONFIG_I2C_DAVINCI) += i2c-davinci.o obj-$(CONFIG_I2C_DESIGNWARE_CORE) += i2c-designware-core.o @@ -79,6 +82,7 @@ obj-$(CONFIG_I2C_PARPORT) += i2c-parport.o obj-$(CONFIG_I2C_PARPORT_LIGHT) += i2c-parport-light.o obj-$(CONFIG_I2C_TAOS_EVM) += i2c-taos-evm.o obj-$(CONFIG_I2C_TINY_USB) += i2c-tiny-usb.o +obj-$(CONFIG_I2C_VIPERBOARD) += i2c-viperboard.o # Other I2C/SMBus bus drivers obj-$(CONFIG_I2C_ACORN) += i2c-acorn.o diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c index 125cd8e0ad25..3f491815e2c4 100644 --- a/drivers/i2c/busses/i2c-ali1535.c +++ b/drivers/i2c/busses/i2c-ali1535.c @@ -139,7 +139,7 @@ static unsigned short ali1535_offset; Note the differences between kernels with the old PCI BIOS interface and newer kernels with the real PCI interface. In compat.h some things are defined to make the transition easier. */ -static int __devinit ali1535_setup(struct pci_dev *dev) +static int ali1535_setup(struct pci_dev *dev) { int retval; unsigned char temp; @@ -502,7 +502,7 @@ static DEFINE_PCI_DEVICE_TABLE(ali1535_ids) = { MODULE_DEVICE_TABLE(pci, ali1535_ids); -static int __devinit ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) +static int ali1535_probe(struct pci_dev *dev, const struct pci_device_id *id) { if (ali1535_setup(dev)) { dev_warn(&dev->dev, @@ -518,7 +518,7 @@ static int __devinit ali1535_probe(struct pci_dev *dev, const struct pci_device_ return i2c_add_adapter(&ali1535_adapter); } -static void __devexit ali1535_remove(struct pci_dev *dev) +static void ali1535_remove(struct pci_dev *dev) { i2c_del_adapter(&ali1535_adapter); release_region(ali1535_smba, ALI1535_SMB_IOSIZE); @@ -528,7 +528,7 @@ static struct pci_driver ali1535_driver = { .name = "ali1535_smbus", .id_table = ali1535_ids, .probe = ali1535_probe, - .remove = __devexit_p(ali1535_remove), + .remove = ali1535_remove, }; module_pci_driver(ali1535_driver); diff --git a/drivers/i2c/busses/i2c-ali1563.c b/drivers/i2c/busses/i2c-ali1563.c index e02d9f86c6a0..84ccd9496a5e 100644 --- a/drivers/i2c/busses/i2c-ali1563.c +++ b/drivers/i2c/busses/i2c-ali1563.c @@ -326,7 +326,7 @@ static u32 ali1563_func(struct i2c_adapter * a) } -static int __devinit ali1563_setup(struct pci_dev * dev) +static int ali1563_setup(struct pci_dev *dev) { u16 ctrl; @@ -390,8 +390,8 @@ static struct i2c_adapter ali1563_adapter = { .algo = &ali1563_algorithm, }; -static int __devinit ali1563_probe(struct pci_dev * dev, - const struct pci_device_id * id_table) +static int ali1563_probe(struct pci_dev *dev, + const struct pci_device_id *id_table) { int error; @@ -411,7 +411,7 @@ exit: return error; } -static void __devexit ali1563_remove(struct pci_dev * dev) +static void ali1563_remove(struct pci_dev *dev) { i2c_del_adapter(&ali1563_adapter); ali1563_shutdown(dev); @@ -428,7 +428,7 @@ static struct pci_driver ali1563_pci_driver = { .name = "ali1563_smbus", .id_table = ali1563_id_table, .probe = ali1563_probe, - .remove = __devexit_p(ali1563_remove), + .remove = ali1563_remove, }; module_pci_driver(ali1563_pci_driver); diff --git a/drivers/i2c/busses/i2c-ali15x3.c b/drivers/i2c/busses/i2c-ali15x3.c index ce8d26d053a5..26bcc6127cee 100644 --- a/drivers/i2c/busses/i2c-ali15x3.c +++ b/drivers/i2c/busses/i2c-ali15x3.c @@ -131,7 +131,7 @@ MODULE_PARM_DESC(force_addr, static struct pci_driver ali15x3_driver; static unsigned short ali15x3_smba; -static int __devinit ali15x3_setup(struct pci_dev *ALI15X3_dev) +static int ali15x3_setup(struct pci_dev *ALI15X3_dev) { u16 a; unsigned char temp; @@ -484,7 +484,7 @@ static DEFINE_PCI_DEVICE_TABLE(ali15x3_ids) = { MODULE_DEVICE_TABLE (pci, ali15x3_ids); -static int __devinit ali15x3_probe(struct pci_dev *dev, const struct pci_device_id *id) +static int ali15x3_probe(struct pci_dev *dev, const struct pci_device_id *id) { if (ali15x3_setup(dev)) { dev_err(&dev->dev, @@ -500,7 +500,7 @@ static int __devinit ali15x3_probe(struct pci_dev *dev, const struct pci_device_ return i2c_add_adapter(&ali15x3_adapter); } -static void __devexit ali15x3_remove(struct pci_dev *dev) +static void ali15x3_remove(struct pci_dev *dev) { i2c_del_adapter(&ali15x3_adapter); release_region(ali15x3_smba, ALI15X3_SMB_IOSIZE); @@ -510,7 +510,7 @@ static struct pci_driver ali15x3_driver = { .name = "ali15x3_smbus", .id_table = ali15x3_ids, .probe = ali15x3_probe, - .remove = __devexit_p(ali15x3_remove), + .remove = ali15x3_remove, }; module_pci_driver(ali15x3_driver); diff --git a/drivers/i2c/busses/i2c-amd756.c b/drivers/i2c/busses/i2c-amd756.c index 304aa03b57b2..e13e2aa2d05d 100644 --- a/drivers/i2c/busses/i2c-amd756.c +++ b/drivers/i2c/busses/i2c-amd756.c @@ -324,8 +324,7 @@ static DEFINE_PCI_DEVICE_TABLE(amd756_ids) = { MODULE_DEVICE_TABLE (pci, amd756_ids); -static int __devinit amd756_probe(struct pci_dev *pdev, - const struct pci_device_id *id) +static int amd756_probe(struct pci_dev *pdev, const struct pci_device_id *id) { int nforce = (id->driver_data == NFORCE); int error; @@ -397,7 +396,7 @@ static int __devinit amd756_probe(struct pci_dev *pdev, return error; } -static void __devexit amd756_remove(struct pci_dev *dev) +static void amd756_remove(struct pci_dev *dev) { i2c_del_adapter(&amd756_smbus); release_region(amd756_ioport, SMB_IOSIZE); @@ -407,7 +406,7 @@ static struct pci_driver amd756_driver = { .name = "amd756_smbus", .id_table = amd756_ids, .probe = amd756_probe, - .remove = __devexit_p(amd756_remove), + .remove = amd756_remove, }; module_pci_driver(amd756_driver); diff --git a/drivers/i2c/busses/i2c-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c index 0919ac1d99aa..a44e6e77c5a1 100644 --- a/drivers/i2c/busses/i2c-amd8111.c +++ b/drivers/i2c/busses/i2c-amd8111.c @@ -422,8 +422,7 @@ static DEFINE_PCI_DEVICE_TABLE(amd8111_ids) = { MODULE_DEVICE_TABLE (pci, amd8111_ids); -static int __devinit amd8111_probe(struct pci_dev *dev, - const struct pci_device_id *id) +static int amd8111_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct amd_smbus *smbus; int error; @@ -475,7 +474,7 @@ static int __devinit amd8111_probe(struct pci_dev *dev, return error; } -static void __devexit amd8111_remove(struct pci_dev *dev) +static void amd8111_remove(struct pci_dev *dev) { struct amd_smbus *smbus = pci_get_drvdata(dev); @@ -488,7 +487,7 @@ static struct pci_driver amd8111_driver = { .name = "amd8111_smbus2", .id_table = amd8111_ids, .probe = amd8111_probe, - .remove = __devexit_p(amd8111_remove), + .remove = amd8111_remove, }; module_pci_driver(amd8111_driver); diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index aa59a254be2c..75195e3f5ddb 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -19,6 +19,8 @@ #include <linux/clk.h> #include <linux/completion.h> +#include <linux/dma-mapping.h> +#include <linux/dmaengine.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/interrupt.h> @@ -29,9 +31,11 @@ #include <linux/of_i2c.h> #include <linux/platform_device.h> #include <linux/slab.h> +#include <linux/platform_data/dma-atmel.h> #define TWI_CLK_HZ 100000 /* max 400 Kbits/s */ #define AT91_I2C_TIMEOUT msecs_to_jiffies(100) /* transfer timeout */ +#define AT91_I2C_DMA_THRESHOLD 8 /* enable DMA if transfer size is bigger than this threshold */ /* AT91 TWI register definitions */ #define AT91_TWI_CR 0x0000 /* Control Register */ @@ -39,6 +43,7 @@ #define AT91_TWI_STOP 0x0002 /* Send a Stop Condition */ #define AT91_TWI_MSEN 0x0004 /* Master Transfer Enable */ #define AT91_TWI_SVDIS 0x0020 /* Slave Transfer Disable */ +#define AT91_TWI_QUICK 0x0040 /* SMBus quick command */ #define AT91_TWI_SWRST 0x0080 /* Software Reset */ #define AT91_TWI_MMR 0x0004 /* Master Mode Register */ @@ -65,24 +70,39 @@ #define AT91_TWI_THR 0x0034 /* Transmit Holding Register */ struct at91_twi_pdata { - unsigned clk_max_div; - unsigned clk_offset; - bool has_unre_flag; + unsigned clk_max_div; + unsigned clk_offset; + bool has_unre_flag; + bool has_dma_support; + struct at_dma_slave dma_slave; +}; + +struct at91_twi_dma { + struct dma_chan *chan_rx; + struct dma_chan *chan_tx; + struct scatterlist sg; + struct dma_async_tx_descriptor *data_desc; + enum dma_data_direction direction; + bool buf_mapped; + bool xfer_in_progress; }; struct at91_twi_dev { - struct device *dev; - void __iomem *base; - struct completion cmd_complete; - struct clk *clk; - u8 *buf; - size_t buf_len; - struct i2c_msg *msg; - int irq; - unsigned transfer_status; - struct i2c_adapter adapter; - unsigned twi_cwgr_reg; - struct at91_twi_pdata *pdata; + struct device *dev; + void __iomem *base; + struct completion cmd_complete; + struct clk *clk; + u8 *buf; + size_t buf_len; + struct i2c_msg *msg; + int irq; + unsigned imr; + unsigned transfer_status; + struct i2c_adapter adapter; + unsigned twi_cwgr_reg; + struct at91_twi_pdata *pdata; + bool use_dma; + struct at91_twi_dma dma; }; static unsigned at91_twi_read(struct at91_twi_dev *dev, unsigned reg) @@ -101,6 +121,17 @@ static void at91_disable_twi_interrupts(struct at91_twi_dev *dev) AT91_TWI_TXCOMP | AT91_TWI_RXRDY | AT91_TWI_TXRDY); } +static void at91_twi_irq_save(struct at91_twi_dev *dev) +{ + dev->imr = at91_twi_read(dev, AT91_TWI_IMR) & 0x7; + at91_disable_twi_interrupts(dev); +} + +static void at91_twi_irq_restore(struct at91_twi_dev *dev) +{ + at91_twi_write(dev, AT91_TWI_IER, dev->imr); +} + static void at91_init_twi_bus(struct at91_twi_dev *dev) { at91_disable_twi_interrupts(dev); @@ -114,7 +145,7 @@ static void at91_init_twi_bus(struct at91_twi_dev *dev) * Calculate symmetric clock as stated in datasheet: * twi_clk = F_MAIN / (2 * (cdiv * (1 << ckdiv) + offset)) */ -static void __devinit at91_calc_twi_clock(struct at91_twi_dev *dev, int twi_clk) +static void at91_calc_twi_clock(struct at91_twi_dev *dev, int twi_clk) { int ckdiv, cdiv, div; struct at91_twi_pdata *pdata = dev->pdata; @@ -137,6 +168,28 @@ static void __devinit at91_calc_twi_clock(struct at91_twi_dev *dev, int twi_clk) dev_dbg(dev->dev, "cdiv %d ckdiv %d\n", cdiv, ckdiv); } +static void at91_twi_dma_cleanup(struct at91_twi_dev *dev) +{ + struct at91_twi_dma *dma = &dev->dma; + + at91_twi_irq_save(dev); + + if (dma->xfer_in_progress) { + if (dma->direction == DMA_FROM_DEVICE) + dmaengine_terminate_all(dma->chan_rx); + else + dmaengine_terminate_all(dma->chan_tx); + dma->xfer_in_progress = false; + } + if (dma->buf_mapped) { + dma_unmap_single(dev->dev, sg_dma_address(&dma->sg), + dev->buf_len, dma->direction); + dma->buf_mapped = false; + } + + at91_twi_irq_restore(dev); +} + static void at91_twi_write_next_byte(struct at91_twi_dev *dev) { if (dev->buf_len <= 0) @@ -153,6 +206,60 @@ static void at91_twi_write_next_byte(struct at91_twi_dev *dev) ++dev->buf; } +static void at91_twi_write_data_dma_callback(void *data) +{ + struct at91_twi_dev *dev = (struct at91_twi_dev *)data; + + dma_unmap_single(dev->dev, sg_dma_address(&dev->dma.sg), + dev->buf_len, DMA_MEM_TO_DEV); + + at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_STOP); +} + +static void at91_twi_write_data_dma(struct at91_twi_dev *dev) +{ + dma_addr_t dma_addr; + struct dma_async_tx_descriptor *txdesc; + struct at91_twi_dma *dma = &dev->dma; + struct dma_chan *chan_tx = dma->chan_tx; + + if (dev->buf_len <= 0) + return; + + dma->direction = DMA_TO_DEVICE; + + at91_twi_irq_save(dev); + dma_addr = dma_map_single(dev->dev, dev->buf, dev->buf_len, + DMA_TO_DEVICE); + if (dma_mapping_error(dev->dev, dma_addr)) { + dev_err(dev->dev, "dma map failed\n"); + return; + } + dma->buf_mapped = true; + at91_twi_irq_restore(dev); + sg_dma_len(&dma->sg) = dev->buf_len; + sg_dma_address(&dma->sg) = dma_addr; + + txdesc = dmaengine_prep_slave_sg(chan_tx, &dma->sg, 1, DMA_MEM_TO_DEV, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + if (!txdesc) { + dev_err(dev->dev, "dma prep slave sg failed\n"); + goto error; + } + + txdesc->callback = at91_twi_write_data_dma_callback; + txdesc->callback_param = dev; + + dma->xfer_in_progress = true; + dmaengine_submit(txdesc); + dma_async_issue_pending(chan_tx); + + return; + +error: + at91_twi_dma_cleanup(dev); +} + static void at91_twi_read_next_byte(struct at91_twi_dev *dev) { if (dev->buf_len <= 0) @@ -178,6 +285,61 @@ static void at91_twi_read_next_byte(struct at91_twi_dev *dev) ++dev->buf; } +static void at91_twi_read_data_dma_callback(void *data) +{ + struct at91_twi_dev *dev = (struct at91_twi_dev *)data; + + dma_unmap_single(dev->dev, sg_dma_address(&dev->dma.sg), + dev->buf_len, DMA_DEV_TO_MEM); + + /* The last two bytes have to be read without using dma */ + dev->buf += dev->buf_len - 2; + dev->buf_len = 2; + at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_RXRDY); +} + +static void at91_twi_read_data_dma(struct at91_twi_dev *dev) +{ + dma_addr_t dma_addr; + struct dma_async_tx_descriptor *rxdesc; + struct at91_twi_dma *dma = &dev->dma; + struct dma_chan *chan_rx = dma->chan_rx; + + dma->direction = DMA_FROM_DEVICE; + + /* Keep in mind that we won't use dma to read the last two bytes */ + at91_twi_irq_save(dev); + dma_addr = dma_map_single(dev->dev, dev->buf, dev->buf_len - 2, + DMA_FROM_DEVICE); + if (dma_mapping_error(dev->dev, dma_addr)) { + dev_err(dev->dev, "dma map failed\n"); + return; + } + dma->buf_mapped = true; + at91_twi_irq_restore(dev); + dma->sg.dma_address = dma_addr; + sg_dma_len(&dma->sg) = dev->buf_len - 2; + + rxdesc = dmaengine_prep_slave_sg(chan_rx, &dma->sg, 1, DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + if (!rxdesc) { + dev_err(dev->dev, "dma prep slave sg failed\n"); + goto error; + } + + rxdesc->callback = at91_twi_read_data_dma_callback; + rxdesc->callback_param = dev; + + dma->xfer_in_progress = true; + dmaengine_submit(rxdesc); + dma_async_issue_pending(dma->chan_rx); + + return; + +error: + at91_twi_dma_cleanup(dev); +} + static irqreturn_t atmel_twi_interrupt(int irq, void *dev_id) { struct at91_twi_dev *dev = dev_id; @@ -212,7 +374,11 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) INIT_COMPLETION(dev->cmd_complete); dev->transfer_status = 0; - if (dev->msg->flags & I2C_M_RD) { + + if (!dev->buf_len) { + at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_QUICK); + at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_TXCOMP); + } else if (dev->msg->flags & I2C_M_RD) { unsigned start_flags = AT91_TWI_START; if (at91_twi_read(dev, AT91_TWI_SR) & AT91_TWI_RXRDY) { @@ -224,12 +390,36 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) if (dev->buf_len <= 1 && !(dev->msg->flags & I2C_M_RECV_LEN)) start_flags |= AT91_TWI_STOP; at91_twi_write(dev, AT91_TWI_CR, start_flags); - at91_twi_write(dev, AT91_TWI_IER, + /* + * When using dma, the last byte has to be read manually in + * order to not send the stop command too late and then + * to receive extra data. In practice, there are some issues + * if you use the dma to read n-1 bytes because of latency. + * Reading n-2 bytes with dma and the two last ones manually + * seems to be the best solution. + */ + if (dev->use_dma && (dev->buf_len > AT91_I2C_DMA_THRESHOLD)) { + at91_twi_read_data_dma(dev); + /* + * It is important to enable TXCOMP irq here because + * doing it only when transferring the last two bytes + * will mask NACK errors since TXCOMP is set when a + * NACK occurs. + */ + at91_twi_write(dev, AT91_TWI_IER, + AT91_TWI_TXCOMP); + } else + at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_TXCOMP | AT91_TWI_RXRDY); } else { - at91_twi_write_next_byte(dev); - at91_twi_write(dev, AT91_TWI_IER, - AT91_TWI_TXCOMP | AT91_TWI_TXRDY); + if (dev->use_dma && (dev->buf_len > AT91_I2C_DMA_THRESHOLD)) { + at91_twi_write_data_dma(dev); + at91_twi_write(dev, AT91_TWI_IER, AT91_TWI_TXCOMP); + } else { + at91_twi_write_next_byte(dev); + at91_twi_write(dev, AT91_TWI_IER, + AT91_TWI_TXCOMP | AT91_TWI_TXRDY); + } } ret = wait_for_completion_interruptible_timeout(&dev->cmd_complete, @@ -237,23 +427,31 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) if (ret == 0) { dev_err(dev->dev, "controller timed out\n"); at91_init_twi_bus(dev); - return -ETIMEDOUT; + ret = -ETIMEDOUT; + goto error; } if (dev->transfer_status & AT91_TWI_NACK) { dev_dbg(dev->dev, "received nack\n"); - return -EREMOTEIO; + ret = -EREMOTEIO; + goto error; } if (dev->transfer_status & AT91_TWI_OVRE) { dev_err(dev->dev, "overrun while reading\n"); - return -EIO; + ret = -EIO; + goto error; } if (has_unre_flag && dev->transfer_status & AT91_TWI_UNRE) { dev_err(dev->dev, "underrun while writing\n"); - return -EIO; + ret = -EIO; + goto error; } dev_dbg(dev->dev, "transfer complete\n"); return 0; + +error: + at91_twi_dma_cleanup(dev); + return ret; } static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num) @@ -324,36 +522,35 @@ static struct at91_twi_pdata at91rm9200_config = { .clk_max_div = 5, .clk_offset = 3, .has_unre_flag = true, + .has_dma_support = false, }; static struct at91_twi_pdata at91sam9261_config = { .clk_max_div = 5, .clk_offset = 4, .has_unre_flag = false, + .has_dma_support = false, }; static struct at91_twi_pdata at91sam9260_config = { .clk_max_div = 7, .clk_offset = 4, .has_unre_flag = false, + .has_dma_support = false, }; static struct at91_twi_pdata at91sam9g20_config = { .clk_max_div = 7, .clk_offset = 4, .has_unre_flag = false, + .has_dma_support = false, }; static struct at91_twi_pdata at91sam9g10_config = { .clk_max_div = 7, .clk_offset = 4, .has_unre_flag = false, -}; - -static struct at91_twi_pdata at91sam9x5_config = { - .clk_max_div = 7, - .clk_offset = 4, - .has_unre_flag = false, + .has_dma_support = false, }; static const struct platform_device_id at91_twi_devtypes[] = { @@ -378,8 +575,18 @@ static const struct platform_device_id at91_twi_devtypes[] = { }; #if defined(CONFIG_OF) +static struct at91_twi_pdata at91sam9x5_config = { + .clk_max_div = 7, + .clk_offset = 4, + .has_unre_flag = false, + .has_dma_support = true, +}; + static const struct of_device_id atmel_twi_dt_ids[] = { { + .compatible = "atmel,at91rm9200-i2c", + .data = &at91rm9200_config, + } , { .compatible = "atmel,at91sam9260-i2c", .data = &at91sam9260_config, } , { @@ -400,7 +607,91 @@ MODULE_DEVICE_TABLE(of, atmel_twi_dt_ids); #define atmel_twi_dt_ids NULL #endif -static struct at91_twi_pdata * __devinit at91_twi_get_driver_data( +static bool filter(struct dma_chan *chan, void *slave) +{ + struct at_dma_slave *sl = slave; + + if (sl->dma_dev == chan->device->dev) { + chan->private = sl; + return true; + } else { + return false; + } +} + +static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr) +{ + int ret = 0; + struct at_dma_slave *sdata; + struct dma_slave_config slave_config; + struct at91_twi_dma *dma = &dev->dma; + + sdata = &dev->pdata->dma_slave; + + memset(&slave_config, 0, sizeof(slave_config)); + slave_config.src_addr = (dma_addr_t)phy_addr + AT91_TWI_RHR; + slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + slave_config.src_maxburst = 1; + slave_config.dst_addr = (dma_addr_t)phy_addr + AT91_TWI_THR; + slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + slave_config.dst_maxburst = 1; + slave_config.device_fc = false; + + if (sdata && sdata->dma_dev) { + dma_cap_mask_t mask; + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + dma->chan_tx = dma_request_channel(mask, filter, sdata); + if (!dma->chan_tx) { + dev_err(dev->dev, "no DMA channel available for tx\n"); + ret = -EBUSY; + goto error; + } + dma->chan_rx = dma_request_channel(mask, filter, sdata); + if (!dma->chan_rx) { + dev_err(dev->dev, "no DMA channel available for rx\n"); + ret = -EBUSY; + goto error; + } + } else { + ret = -EINVAL; + goto error; + } + + slave_config.direction = DMA_MEM_TO_DEV; + if (dmaengine_slave_config(dma->chan_tx, &slave_config)) { + dev_err(dev->dev, "failed to configure tx channel\n"); + ret = -EINVAL; + goto error; + } + + slave_config.direction = DMA_DEV_TO_MEM; + if (dmaengine_slave_config(dma->chan_rx, &slave_config)) { + dev_err(dev->dev, "failed to configure rx channel\n"); + ret = -EINVAL; + goto error; + } + + sg_init_table(&dma->sg, 1); + dma->buf_mapped = false; + dma->xfer_in_progress = false; + + dev_info(dev->dev, "using %s (tx) and %s (rx) for DMA transfers\n", + dma_chan_name(dma->chan_tx), dma_chan_name(dma->chan_rx)); + + return ret; + +error: + dev_info(dev->dev, "can't use DMA\n"); + if (dma->chan_rx) + dma_release_channel(dma->chan_rx); + if (dma->chan_tx) + dma_release_channel(dma->chan_tx); + return ret; +} + +static struct at91_twi_pdata *at91_twi_get_driver_data( struct platform_device *pdev) { if (pdev->dev.of_node) { @@ -408,16 +699,17 @@ static struct at91_twi_pdata * __devinit at91_twi_get_driver_data( match = of_match_node(atmel_twi_dt_ids, pdev->dev.of_node); if (!match) return NULL; - return match->data; + return (struct at91_twi_pdata *)match->data; } return (struct at91_twi_pdata *) platform_get_device_id(pdev)->driver_data; } -static int __devinit at91_twi_probe(struct platform_device *pdev) +static int at91_twi_probe(struct platform_device *pdev) { struct at91_twi_dev *dev; struct resource *mem; int rc; + u32 phy_addr; dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); if (!dev) @@ -428,14 +720,15 @@ static int __devinit at91_twi_probe(struct platform_device *pdev) mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) return -ENODEV; + phy_addr = mem->start; dev->pdata = at91_twi_get_driver_data(pdev); if (!dev->pdata) return -ENODEV; - dev->base = devm_request_and_ioremap(&pdev->dev, mem); - if (!dev->base) - return -EBUSY; + dev->base = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(dev->base)) + return PTR_ERR(dev->base); dev->irq = platform_get_irq(pdev, 0); if (dev->irq < 0) @@ -457,6 +750,11 @@ static int __devinit at91_twi_probe(struct platform_device *pdev) } clk_prepare_enable(dev->clk); + if (dev->pdata->has_dma_support) { + if (at91_twi_configure_dma(dev, phy_addr) == 0) + dev->use_dma = true; + } + at91_calc_twi_clock(dev, TWI_CLK_HZ); at91_init_twi_bus(dev); @@ -484,7 +782,7 @@ static int __devinit at91_twi_probe(struct platform_device *pdev) return 0; } -static int __devexit at91_twi_remove(struct platform_device *pdev) +static int at91_twi_remove(struct platform_device *pdev) { struct at91_twi_dev *dev = platform_get_drvdata(pdev); int rc; @@ -525,7 +823,7 @@ static const struct dev_pm_ops at91_twi_pm = { static struct platform_driver at91_twi_driver = { .probe = at91_twi_probe, - .remove = __devexit_p(at91_twi_remove), + .remove = at91_twi_remove, .id_table = at91_twi_devtypes, .driver = { .name = "at91_i2c", diff --git a/drivers/i2c/busses/i2c-au1550.c b/drivers/i2c/busses/i2c-au1550.c index 582d616db346..b5b89239d622 100644 --- a/drivers/i2c/busses/i2c-au1550.c +++ b/drivers/i2c/busses/i2c-au1550.c @@ -313,7 +313,7 @@ static void i2c_au1550_disable(struct i2c_au1550_data *priv) * Prior to calling us, the 50MHz clock frequency and routing * must have been set up for the PSC indicated by the adapter. */ -static int __devinit +static int i2c_au1550_probe(struct platform_device *pdev) { struct i2c_au1550_data *priv; @@ -372,11 +372,10 @@ out: return ret; } -static int __devexit i2c_au1550_remove(struct platform_device *pdev) +static int i2c_au1550_remove(struct platform_device *pdev) { struct i2c_au1550_data *priv = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&priv->adap); i2c_au1550_disable(priv); iounmap(priv->psc_base); @@ -423,7 +422,7 @@ static struct platform_driver au1xpsc_smbus_driver = { .pm = AU1XPSC_SMBUS_PMOPS, }, .probe = i2c_au1550_probe, - .remove = __devexit_p(i2c_au1550_remove), + .remove = i2c_au1550_remove, }; module_platform_driver(au1xpsc_smbus_driver); diff --git a/drivers/i2c/busses/i2c-bcm2835.c b/drivers/i2c/busses/i2c-bcm2835.c new file mode 100644 index 000000000000..ea4b08fc3353 --- /dev/null +++ b/drivers/i2c/busses/i2c-bcm2835.c @@ -0,0 +1,342 @@ +/* + * BCM2835 master mode driver + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk.h> +#include <linux/completion.h> +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#define BCM2835_I2C_C 0x0 +#define BCM2835_I2C_S 0x4 +#define BCM2835_I2C_DLEN 0x8 +#define BCM2835_I2C_A 0xc +#define BCM2835_I2C_FIFO 0x10 +#define BCM2835_I2C_DIV 0x14 +#define BCM2835_I2C_DEL 0x18 +#define BCM2835_I2C_CLKT 0x1c + +#define BCM2835_I2C_C_READ BIT(0) +#define BCM2835_I2C_C_CLEAR BIT(4) /* bits 4 and 5 both clear */ +#define BCM2835_I2C_C_ST BIT(7) +#define BCM2835_I2C_C_INTD BIT(8) +#define BCM2835_I2C_C_INTT BIT(9) +#define BCM2835_I2C_C_INTR BIT(10) +#define BCM2835_I2C_C_I2CEN BIT(15) + +#define BCM2835_I2C_S_TA BIT(0) +#define BCM2835_I2C_S_DONE BIT(1) +#define BCM2835_I2C_S_TXW BIT(2) +#define BCM2835_I2C_S_RXR BIT(3) +#define BCM2835_I2C_S_TXD BIT(4) +#define BCM2835_I2C_S_RXD BIT(5) +#define BCM2835_I2C_S_TXE BIT(6) +#define BCM2835_I2C_S_RXF BIT(7) +#define BCM2835_I2C_S_ERR BIT(8) +#define BCM2835_I2C_S_CLKT BIT(9) +#define BCM2835_I2C_S_LEN BIT(10) /* Fake bit for SW error reporting */ + +#define BCM2835_I2C_TIMEOUT (msecs_to_jiffies(1000)) + +struct bcm2835_i2c_dev { + struct device *dev; + void __iomem *regs; + struct clk *clk; + int irq; + struct i2c_adapter adapter; + struct completion completion; + u32 msg_err; + u8 *msg_buf; + size_t msg_buf_remaining; +}; + +static inline void bcm2835_i2c_writel(struct bcm2835_i2c_dev *i2c_dev, + u32 reg, u32 val) +{ + writel(val, i2c_dev->regs + reg); +} + +static inline u32 bcm2835_i2c_readl(struct bcm2835_i2c_dev *i2c_dev, u32 reg) +{ + return readl(i2c_dev->regs + reg); +} + +static void bcm2835_fill_txfifo(struct bcm2835_i2c_dev *i2c_dev) +{ + u32 val; + + while (i2c_dev->msg_buf_remaining) { + val = bcm2835_i2c_readl(i2c_dev, BCM2835_I2C_S); + if (!(val & BCM2835_I2C_S_TXD)) + break; + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_FIFO, + *i2c_dev->msg_buf); + i2c_dev->msg_buf++; + i2c_dev->msg_buf_remaining--; + } +} + +static void bcm2835_drain_rxfifo(struct bcm2835_i2c_dev *i2c_dev) +{ + u32 val; + + while (i2c_dev->msg_buf_remaining) { + val = bcm2835_i2c_readl(i2c_dev, BCM2835_I2C_S); + if (!(val & BCM2835_I2C_S_RXD)) + break; + *i2c_dev->msg_buf = bcm2835_i2c_readl(i2c_dev, + BCM2835_I2C_FIFO); + i2c_dev->msg_buf++; + i2c_dev->msg_buf_remaining--; + } +} + +static irqreturn_t bcm2835_i2c_isr(int this_irq, void *data) +{ + struct bcm2835_i2c_dev *i2c_dev = data; + u32 val, err; + + val = bcm2835_i2c_readl(i2c_dev, BCM2835_I2C_S); + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_S, val); + + err = val & (BCM2835_I2C_S_CLKT | BCM2835_I2C_S_ERR); + if (err) { + i2c_dev->msg_err = err; + complete(&i2c_dev->completion); + return IRQ_HANDLED; + } + + if (val & BCM2835_I2C_S_RXD) { + bcm2835_drain_rxfifo(i2c_dev); + if (!(val & BCM2835_I2C_S_DONE)) + return IRQ_HANDLED; + } + + if (val & BCM2835_I2C_S_DONE) { + if (i2c_dev->msg_buf_remaining) + i2c_dev->msg_err = BCM2835_I2C_S_LEN; + else + i2c_dev->msg_err = 0; + complete(&i2c_dev->completion); + return IRQ_HANDLED; + } + + if (val & BCM2835_I2C_S_TXD) { + bcm2835_fill_txfifo(i2c_dev); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + +static int bcm2835_i2c_xfer_msg(struct bcm2835_i2c_dev *i2c_dev, + struct i2c_msg *msg) +{ + u32 c; + int time_left; + + i2c_dev->msg_buf = msg->buf; + i2c_dev->msg_buf_remaining = msg->len; + INIT_COMPLETION(i2c_dev->completion); + + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_C, BCM2835_I2C_C_CLEAR); + + if (msg->flags & I2C_M_RD) { + c = BCM2835_I2C_C_READ | BCM2835_I2C_C_INTR; + } else { + c = BCM2835_I2C_C_INTT; + bcm2835_fill_txfifo(i2c_dev); + } + c |= BCM2835_I2C_C_ST | BCM2835_I2C_C_INTD | BCM2835_I2C_C_I2CEN; + + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_A, msg->addr); + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_DLEN, msg->len); + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_C, c); + + time_left = wait_for_completion_timeout(&i2c_dev->completion, + BCM2835_I2C_TIMEOUT); + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_C, BCM2835_I2C_C_CLEAR); + if (!time_left) { + dev_err(i2c_dev->dev, "i2c transfer timed out\n"); + return -ETIMEDOUT; + } + + if (likely(!i2c_dev->msg_err)) + return 0; + + if ((i2c_dev->msg_err & BCM2835_I2C_S_ERR) && + (msg->flags & I2C_M_IGNORE_NAK)) + return 0; + + dev_err(i2c_dev->dev, "i2c transfer failed: %x\n", i2c_dev->msg_err); + + if (i2c_dev->msg_err & BCM2835_I2C_S_ERR) + return -EREMOTEIO; + else + return -EIO; +} + +static int bcm2835_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], + int num) +{ + struct bcm2835_i2c_dev *i2c_dev = i2c_get_adapdata(adap); + int i; + int ret = 0; + + for (i = 0; i < num; i++) { + ret = bcm2835_i2c_xfer_msg(i2c_dev, &msgs[i]); + if (ret) + break; + } + + return ret ?: i; +} + +static u32 bcm2835_i2c_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm bcm2835_i2c_algo = { + .master_xfer = bcm2835_i2c_xfer, + .functionality = bcm2835_i2c_func, +}; + +static int bcm2835_i2c_probe(struct platform_device *pdev) +{ + struct bcm2835_i2c_dev *i2c_dev; + struct resource *mem, *requested, *irq; + u32 bus_clk_rate, divider; + int ret; + struct i2c_adapter *adap; + + i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL); + if (!i2c_dev) { + dev_err(&pdev->dev, "Cannot allocate i2c_dev\n"); + return -ENOMEM; + } + platform_set_drvdata(pdev, i2c_dev); + i2c_dev->dev = &pdev->dev; + init_completion(&i2c_dev->completion); + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + dev_err(&pdev->dev, "No mem resource\n"); + return -ENODEV; + } + + requested = devm_request_mem_region(&pdev->dev, mem->start, + resource_size(mem), + dev_name(&pdev->dev)); + if (!requested) { + dev_err(&pdev->dev, "Could not claim register region\n"); + return -EBUSY; + } + + i2c_dev->regs = devm_ioremap(&pdev->dev, mem->start, + resource_size(mem)); + if (!i2c_dev->regs) { + dev_err(&pdev->dev, "Could not map registers\n"); + return -ENOMEM; + } + + i2c_dev->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(i2c_dev->clk)) { + dev_err(&pdev->dev, "Could not get clock\n"); + return PTR_ERR(i2c_dev->clk); + } + + ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency", + &bus_clk_rate); + if (ret < 0) { + dev_warn(&pdev->dev, + "Could not read clock-frequency property\n"); + bus_clk_rate = 100000; + } + + divider = DIV_ROUND_UP(clk_get_rate(i2c_dev->clk), bus_clk_rate); + /* + * Per the datasheet, the register is always interpreted as an even + * number, by rounding down. In other words, the LSB is ignored. So, + * if the LSB is set, increment the divider to avoid any issue. + */ + if (divider & 1) + divider++; + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_DIV, divider); + + irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!irq) { + dev_err(&pdev->dev, "No IRQ resource\n"); + return -ENODEV; + } + i2c_dev->irq = irq->start; + + ret = request_irq(i2c_dev->irq, bcm2835_i2c_isr, IRQF_SHARED, + dev_name(&pdev->dev), i2c_dev); + if (ret) { + dev_err(&pdev->dev, "Could not request IRQ\n"); + return -ENODEV; + } + + adap = &i2c_dev->adapter; + i2c_set_adapdata(adap, i2c_dev); + adap->owner = THIS_MODULE; + adap->class = I2C_CLASS_HWMON; + strlcpy(adap->name, "bcm2835 I2C adapter", sizeof(adap->name)); + adap->algo = &bcm2835_i2c_algo; + adap->dev.parent = &pdev->dev; + + bcm2835_i2c_writel(i2c_dev, BCM2835_I2C_C, 0); + + ret = i2c_add_adapter(adap); + if (ret) + free_irq(i2c_dev->irq, i2c_dev); + + return ret; +} + +static int bcm2835_i2c_remove(struct platform_device *pdev) +{ + struct bcm2835_i2c_dev *i2c_dev = platform_get_drvdata(pdev); + + free_irq(i2c_dev->irq, i2c_dev); + i2c_del_adapter(&i2c_dev->adapter); + + return 0; +} + +static const struct of_device_id bcm2835_i2c_of_match[] = { + { .compatible = "brcm,bcm2835-i2c" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm2835_i2c_of_match); + +static struct platform_driver bcm2835_i2c_driver = { + .probe = bcm2835_i2c_probe, + .remove = bcm2835_i2c_remove, + .driver = { + .name = "i2c-bcm2835", + .owner = THIS_MODULE, + .of_match_table = bcm2835_i2c_of_match, + }, +}; +module_platform_driver(bcm2835_i2c_driver); + +MODULE_AUTHOR("Stephen Warren <swarren@wwwdotorg.org>"); +MODULE_DESCRIPTION("BCM2835 I2C bus adapter"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:i2c-bcm2835"); diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c index 0cf780fd6ef1..05080c449c6b 100644 --- a/drivers/i2c/busses/i2c-bfin-twi.c +++ b/drivers/i2c/busses/i2c-bfin-twi.c @@ -724,8 +724,6 @@ static int i2c_bfin_twi_remove(struct platform_device *pdev) { struct bfin_twi_iface *iface = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); - i2c_del_adapter(&(iface->adap)); free_irq(iface->irq, iface); peripheral_free_list((unsigned short *)pdev->dev.platform_data); diff --git a/drivers/i2c/busses/i2c-cbus-gpio.c b/drivers/i2c/busses/i2c-cbus-gpio.c new file mode 100644 index 000000000000..98386d659318 --- /dev/null +++ b/drivers/i2c/busses/i2c-cbus-gpio.c @@ -0,0 +1,300 @@ +/* + * CBUS I2C driver for Nokia Internet Tablets. + * + * Copyright (C) 2004-2010 Nokia Corporation + * + * Based on code written by Juha Yrjölä, David Weinehall, Mikko Ylinen and + * Felipe Balbi. Converted to I2C driver by Aaro Koskinen. + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/io.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_gpio.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/platform_data/i2c-cbus-gpio.h> + +/* + * Bit counts are derived from Nokia implementation. These should be checked + * if other CBUS implementations appear. + */ +#define CBUS_ADDR_BITS 3 +#define CBUS_REG_BITS 5 + +struct cbus_host { + spinlock_t lock; /* host lock */ + struct device *dev; + int clk_gpio; + int dat_gpio; + int sel_gpio; +}; + +/** + * cbus_send_bit - sends one bit over the bus + * @host: the host we're using + * @bit: one bit of information to send + */ +static void cbus_send_bit(struct cbus_host *host, unsigned bit) +{ + gpio_set_value(host->dat_gpio, bit ? 1 : 0); + gpio_set_value(host->clk_gpio, 1); + gpio_set_value(host->clk_gpio, 0); +} + +/** + * cbus_send_data - sends @len amount of data over the bus + * @host: the host we're using + * @data: the data to send + * @len: size of the transfer + */ +static void cbus_send_data(struct cbus_host *host, unsigned data, unsigned len) +{ + int i; + + for (i = len; i > 0; i--) + cbus_send_bit(host, data & (1 << (i - 1))); +} + +/** + * cbus_receive_bit - receives one bit from the bus + * @host: the host we're using + */ +static int cbus_receive_bit(struct cbus_host *host) +{ + int ret; + + gpio_set_value(host->clk_gpio, 1); + ret = gpio_get_value(host->dat_gpio); + gpio_set_value(host->clk_gpio, 0); + return ret; +} + +/** + * cbus_receive_word - receives 16-bit word from the bus + * @host: the host we're using + */ +static int cbus_receive_word(struct cbus_host *host) +{ + int ret = 0; + int i; + + for (i = 16; i > 0; i--) { + int bit = cbus_receive_bit(host); + + if (bit < 0) + return bit; + + if (bit) + ret |= 1 << (i - 1); + } + return ret; +} + +/** + * cbus_transfer - transfers data over the bus + * @host: the host we're using + * @rw: read/write flag + * @dev: device address + * @reg: register address + * @data: if @rw == I2C_SBUS_WRITE data to send otherwise 0 + */ +static int cbus_transfer(struct cbus_host *host, char rw, unsigned dev, + unsigned reg, unsigned data) +{ + unsigned long flags; + int ret; + + /* We don't want interrupts disturbing our transfer */ + spin_lock_irqsave(&host->lock, flags); + + /* Reset state and start of transfer, SEL stays down during transfer */ + gpio_set_value(host->sel_gpio, 0); + + /* Set the DAT pin to output */ + gpio_direction_output(host->dat_gpio, 1); + + /* Send the device address */ + cbus_send_data(host, dev, CBUS_ADDR_BITS); + + /* Send the rw flag */ + cbus_send_bit(host, rw == I2C_SMBUS_READ); + + /* Send the register address */ + cbus_send_data(host, reg, CBUS_REG_BITS); + + if (rw == I2C_SMBUS_WRITE) { + cbus_send_data(host, data, 16); + ret = 0; + } else { + ret = gpio_direction_input(host->dat_gpio); + if (ret) { + dev_dbg(host->dev, "failed setting direction\n"); + goto out; + } + gpio_set_value(host->clk_gpio, 1); + + ret = cbus_receive_word(host); + if (ret < 0) { + dev_dbg(host->dev, "failed receiving data\n"); + goto out; + } + } + + /* Indicate end of transfer, SEL goes up until next transfer */ + gpio_set_value(host->sel_gpio, 1); + gpio_set_value(host->clk_gpio, 1); + gpio_set_value(host->clk_gpio, 0); + +out: + spin_unlock_irqrestore(&host->lock, flags); + + return ret; +} + +static int cbus_i2c_smbus_xfer(struct i2c_adapter *adapter, + u16 addr, + unsigned short flags, + char read_write, + u8 command, + int size, + union i2c_smbus_data *data) +{ + struct cbus_host *chost = i2c_get_adapdata(adapter); + int ret; + + if (size != I2C_SMBUS_WORD_DATA) + return -EINVAL; + + ret = cbus_transfer(chost, read_write == I2C_SMBUS_READ, addr, + command, data->word); + if (ret < 0) + return ret; + + if (read_write == I2C_SMBUS_READ) + data->word = ret; + + return 0; +} + +static u32 cbus_i2c_func(struct i2c_adapter *adapter) +{ + return I2C_FUNC_SMBUS_READ_WORD_DATA | I2C_FUNC_SMBUS_WRITE_WORD_DATA; +} + +static const struct i2c_algorithm cbus_i2c_algo = { + .smbus_xfer = cbus_i2c_smbus_xfer, + .functionality = cbus_i2c_func, +}; + +static int cbus_i2c_remove(struct platform_device *pdev) +{ + struct i2c_adapter *adapter = platform_get_drvdata(pdev); + + return i2c_del_adapter(adapter); +} + +static int cbus_i2c_probe(struct platform_device *pdev) +{ + struct i2c_adapter *adapter; + struct cbus_host *chost; + int ret; + + adapter = devm_kzalloc(&pdev->dev, sizeof(struct i2c_adapter), + GFP_KERNEL); + if (!adapter) + return -ENOMEM; + + chost = devm_kzalloc(&pdev->dev, sizeof(*chost), GFP_KERNEL); + if (!chost) + return -ENOMEM; + + if (pdev->dev.of_node) { + struct device_node *dnode = pdev->dev.of_node; + if (of_gpio_count(dnode) != 3) + return -ENODEV; + chost->clk_gpio = of_get_gpio(dnode, 0); + chost->dat_gpio = of_get_gpio(dnode, 1); + chost->sel_gpio = of_get_gpio(dnode, 2); + } else if (pdev->dev.platform_data) { + struct i2c_cbus_platform_data *pdata = pdev->dev.platform_data; + chost->clk_gpio = pdata->clk_gpio; + chost->dat_gpio = pdata->dat_gpio; + chost->sel_gpio = pdata->sel_gpio; + } else { + return -ENODEV; + } + + adapter->owner = THIS_MODULE; + adapter->class = I2C_CLASS_HWMON; + adapter->dev.parent = &pdev->dev; + adapter->nr = pdev->id; + adapter->timeout = HZ; + adapter->algo = &cbus_i2c_algo; + strlcpy(adapter->name, "CBUS I2C adapter", sizeof(adapter->name)); + + spin_lock_init(&chost->lock); + chost->dev = &pdev->dev; + + ret = devm_gpio_request_one(&pdev->dev, chost->clk_gpio, + GPIOF_OUT_INIT_LOW, "CBUS clk"); + if (ret) + return ret; + + ret = devm_gpio_request_one(&pdev->dev, chost->dat_gpio, GPIOF_IN, + "CBUS data"); + if (ret) + return ret; + + ret = devm_gpio_request_one(&pdev->dev, chost->sel_gpio, + GPIOF_OUT_INIT_HIGH, "CBUS sel"); + if (ret) + return ret; + + i2c_set_adapdata(adapter, chost); + platform_set_drvdata(pdev, adapter); + + return i2c_add_numbered_adapter(adapter); +} + +#if defined(CONFIG_OF) +static const struct of_device_id i2c_cbus_dt_ids[] = { + { .compatible = "i2c-cbus-gpio", }, + { } +}; +MODULE_DEVICE_TABLE(of, i2c_cbus_dt_ids); +#endif + +static struct platform_driver cbus_i2c_driver = { + .probe = cbus_i2c_probe, + .remove = cbus_i2c_remove, + .driver = { + .owner = THIS_MODULE, + .name = "i2c-cbus-gpio", + }, +}; +module_platform_driver(cbus_i2c_driver); + +MODULE_ALIAS("platform:i2c-cbus-gpio"); +MODULE_DESCRIPTION("CBUS I2C driver"); +MODULE_AUTHOR("Juha Yrjölä"); +MODULE_AUTHOR("David Weinehall"); +MODULE_AUTHOR("Mikko Ylinen"); +MODULE_AUTHOR("Felipe Balbi"); +MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c index c1e1096ba069..3823623baa48 100644 --- a/drivers/i2c/busses/i2c-cpm.c +++ b/drivers/i2c/busses/i2c-cpm.c @@ -426,7 +426,7 @@ static const struct i2c_adapter cpm_ops = { .algo = &cpm_i2c_algo, }; -static int __devinit cpm_i2c_setup(struct cpm_i2c *cpm) +static int cpm_i2c_setup(struct cpm_i2c *cpm) { struct platform_device *ofdev = cpm->ofdev; const u32 *data; @@ -634,7 +634,7 @@ static void cpm_i2c_shutdown(struct cpm_i2c *cpm) cpm_muram_free(cpm->i2c_addr); } -static int __devinit cpm_i2c_probe(struct platform_device *ofdev) +static int cpm_i2c_probe(struct platform_device *ofdev) { int result, len; struct cpm_i2c *cpm; @@ -682,13 +682,12 @@ static int __devinit cpm_i2c_probe(struct platform_device *ofdev) out_shut: cpm_i2c_shutdown(cpm); out_free: - dev_set_drvdata(&ofdev->dev, NULL); kfree(cpm); return result; } -static int __devexit cpm_i2c_remove(struct platform_device *ofdev) +static int cpm_i2c_remove(struct platform_device *ofdev) { struct cpm_i2c *cpm = dev_get_drvdata(&ofdev->dev); @@ -696,7 +695,6 @@ static int __devexit cpm_i2c_remove(struct platform_device *ofdev) cpm_i2c_shutdown(cpm); - dev_set_drvdata(&ofdev->dev, NULL); kfree(cpm); return 0; @@ -716,7 +714,7 @@ MODULE_DEVICE_TABLE(of, cpm_i2c_match); static struct platform_driver cpm_i2c_driver = { .probe = cpm_i2c_probe, - .remove = __devexit_p(cpm_i2c_remove), + .remove = cpm_i2c_remove, .driver = { .name = "fsl-i2c-cpm", .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index 6a0a55319449..7d1e590a7bb6 100644 --- a/drivers/i2c/busses/i2c-davinci.c +++ b/drivers/i2c/busses/i2c-davinci.c @@ -755,7 +755,6 @@ err_mem_ioremap: clk_put(dev->clk); dev->clk = NULL; err_free_mem: - platform_set_drvdata(pdev, NULL); put_device(&pdev->dev); kfree(dev); err_release_region: @@ -771,7 +770,6 @@ static int davinci_i2c_remove(struct platform_device *pdev) i2c_davinci_cpufreq_deregister(dev); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&dev->adapter); put_device(&pdev->dev); diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index cbba7db9ad59..94fd81875409 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -34,6 +34,7 @@ #include <linux/io.h> #include <linux/pm_runtime.h> #include <linux/delay.h> +#include <linux/module.h> #include "i2c-designware-core.h" /* @@ -412,11 +413,23 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev) rx_limit = dev->rx_fifo_depth - dw_readl(dev, DW_IC_RXFLR); while (buf_len > 0 && tx_limit > 0 && rx_limit > 0) { + u32 cmd = 0; + + /* + * If IC_EMPTYFIFO_HOLD_MASTER_EN is set we must + * manually set the stop bit. However, it cannot be + * detected from the registers so we set it always + * when writing/reading the last byte. + */ + if (dev->msg_write_idx == dev->msgs_num - 1 && + buf_len == 1) + cmd |= BIT(9); + if (msgs[dev->msg_write_idx].flags & I2C_M_RD) { - dw_writel(dev, 0x100, DW_IC_DATA_CMD); + dw_writel(dev, cmd | 0x100, DW_IC_DATA_CMD); rx_limit--; } else - dw_writel(dev, *buf++, DW_IC_DATA_CMD); + dw_writel(dev, cmd | *buf++, DW_IC_DATA_CMD); tx_limit--; buf_len--; } @@ -725,3 +738,6 @@ u32 i2c_dw_read_comp_param(struct dw_i2c_dev *dev) return dw_readl(dev, DW_IC_COMP_PARAM_1); } EXPORT_SYMBOL_GPL(i2c_dw_read_comp_param); + +MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter core"); +MODULE_LICENSE("GPL"); diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index 92a1e2c15baa..7c5e383c350d 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -207,7 +207,7 @@ static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) return dev->controller->clk_khz; } -static int __devinit i2c_dw_pci_probe(struct pci_dev *pdev, +static int i2c_dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct dw_i2c_dev *dev; @@ -319,7 +319,6 @@ err_free_irq: free_irq(pdev->irq, dev); err_iounmap: iounmap(dev->base); - pci_set_drvdata(pdev, NULL); put_device(&pdev->dev); kfree(dev); err_release_region: @@ -328,7 +327,7 @@ exit: return r; } -static void __devexit i2c_dw_pci_remove(struct pci_dev *pdev) +static void i2c_dw_pci_remove(struct pci_dev *pdev) { struct dw_i2c_dev *dev = pci_get_drvdata(pdev); @@ -336,7 +335,6 @@ static void __devexit i2c_dw_pci_remove(struct pci_dev *pdev) pm_runtime_forbid(&pdev->dev); pm_runtime_get_noresume(&pdev->dev); - pci_set_drvdata(pdev, NULL); i2c_del_adapter(&dev->adapter); put_device(&pdev->dev); @@ -368,7 +366,7 @@ static struct pci_driver dw_i2c_driver = { .name = DRIVER_NAME, .id_table = i2_designware_pci_ids, .probe = i2c_dw_pci_probe, - .remove = __devexit_p(i2c_dw_pci_remove), + .remove = i2c_dw_pci_remove, .driver = { .pm = &i2c_dw_pm_ops, }, diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 0506fef8dc00..0ceb6e1b0f65 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -37,8 +37,10 @@ #include <linux/of_i2c.h> #include <linux/platform_device.h> #include <linux/pm.h> +#include <linux/pm_runtime.h> #include <linux/io.h> #include <linux/slab.h> +#include <linux/acpi.h> #include "i2c-designware-core.h" static struct i2c_algorithm i2c_dw_algo = { @@ -50,7 +52,43 @@ static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) return clk_get_rate(dev->clk)/1000; } -static int __devinit dw_i2c_probe(struct platform_device *pdev) +#ifdef CONFIG_ACPI +static int dw_i2c_acpi_configure(struct platform_device *pdev) +{ + struct dw_i2c_dev *dev = platform_get_drvdata(pdev); + struct acpi_device *adev; + int busno, ret; + + if (!ACPI_HANDLE(&pdev->dev)) + return -ENODEV; + + ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev); + if (ret) + return -ENODEV; + + dev->adapter.nr = -1; + if (adev->pnp.unique_id && !kstrtoint(adev->pnp.unique_id, 0, &busno)) + dev->adapter.nr = busno; + + dev->tx_fifo_depth = 32; + dev->rx_fifo_depth = 32; + return 0; +} + +static const struct acpi_device_id dw_i2c_acpi_match[] = { + { "INT33C2", 0 }, + { "INT33C3", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); +#else +static inline int dw_i2c_acpi_configure(struct platform_device *pdev) +{ + return -ENODEV; +} +#endif + +static int dw_i2c_probe(struct platform_device *pdev) { struct dw_i2c_dev *dev; struct i2c_adapter *adap; @@ -114,18 +152,22 @@ static int __devinit dw_i2c_probe(struct platform_device *pdev) r = -EBUSY; goto err_unuse_clocks; } - { + + /* Try first if we can configure the device from ACPI */ + r = dw_i2c_acpi_configure(pdev); + if (r) { u32 param1 = i2c_dw_read_comp_param(dev); dev->tx_fifo_depth = ((param1 >> 16) & 0xff) + 1; dev->rx_fifo_depth = ((param1 >> 8) & 0xff) + 1; + dev->adapter.nr = pdev->id; } r = i2c_dw_init(dev); if (r) goto err_iounmap; i2c_dw_disable_int(dev); - r = request_irq(dev->irq, i2c_dw_isr, IRQF_DISABLED, pdev->name, dev); + r = request_irq(dev->irq, i2c_dw_isr, IRQF_SHARED, pdev->name, dev); if (r) { dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq); goto err_iounmap; @@ -140,14 +182,19 @@ static int __devinit dw_i2c_probe(struct platform_device *pdev) adap->algo = &i2c_dw_algo; adap->dev.parent = &pdev->dev; adap->dev.of_node = pdev->dev.of_node; + ACPI_HANDLE_SET(&adap->dev, ACPI_HANDLE(&pdev->dev)); - adap->nr = pdev->id; r = i2c_add_numbered_adapter(adap); if (r) { dev_err(&pdev->dev, "failure adding adapter\n"); goto err_free_irq; } of_i2c_register_devices(adap); + acpi_i2c_register_devices(adap); + + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + pm_runtime_put(&pdev->dev); return 0; @@ -160,7 +207,6 @@ err_unuse_clocks: clk_put(dev->clk); dev->clk = NULL; err_free_mem: - platform_set_drvdata(pdev, NULL); put_device(&pdev->dev); kfree(dev); err_release_region: @@ -169,12 +215,13 @@ err_release_region: return r; } -static int __devexit dw_i2c_remove(struct platform_device *pdev) +static int dw_i2c_remove(struct platform_device *pdev) { struct dw_i2c_dev *dev = platform_get_drvdata(pdev); struct resource *mem; - platform_set_drvdata(pdev, NULL); + pm_runtime_get_sync(&pdev->dev); + i2c_del_adapter(&dev->adapter); put_device(&pdev->dev); @@ -186,6 +233,9 @@ static int __devexit dw_i2c_remove(struct platform_device *pdev) free_irq(dev->irq, dev); kfree(dev); + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(mem->start, resource_size(mem)); return 0; @@ -228,11 +278,12 @@ static SIMPLE_DEV_PM_OPS(dw_i2c_dev_pm_ops, dw_i2c_suspend, dw_i2c_resume); MODULE_ALIAS("platform:i2c_designware"); static struct platform_driver dw_i2c_driver = { - .remove = __devexit_p(dw_i2c_remove), + .remove = dw_i2c_remove, .driver = { .name = "i2c_designware", .owner = THIS_MODULE, .of_match_table = of_match_ptr(dw_i2c_of_match), + .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), .pm = &dw_i2c_dev_pm_ops, }, }; diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c index 259f7697bf25..0f3752967c4b 100644 --- a/drivers/i2c/busses/i2c-eg20t.c +++ b/drivers/i2c/busses/i2c-eg20t.c @@ -758,7 +758,7 @@ static void pch_i2c_disbl_int(struct i2c_algo_pch_data *adap) iowrite32(BUFFER_MODE_INTR_DISBL, p + PCH_I2CBUFMSK); } -static int __devinit pch_i2c_probe(struct pci_dev *pdev, +static int pch_i2c_probe(struct pci_dev *pdev, const struct pci_device_id *id) { void __iomem *base_addr; @@ -851,7 +851,7 @@ err_pci_enable: return ret; } -static void __devexit pch_i2c_remove(struct pci_dev *pdev) +static void pch_i2c_remove(struct pci_dev *pdev) { int i; struct adapter_info *adap_info = pci_get_drvdata(pdev); @@ -869,8 +869,6 @@ static void __devexit pch_i2c_remove(struct pci_dev *pdev) for (i = 0; i < adap_info->ch_num; i++) adap_info->pch_data[i].pch_base_address = NULL; - pci_set_drvdata(pdev, NULL); - pci_release_regions(pdev); pci_disable_device(pdev); @@ -948,7 +946,7 @@ static struct pci_driver pch_pcidriver = { .name = KBUILD_MODNAME, .id_table = pch_pcidev_id, .probe = pch_i2c_probe, - .remove = __devexit_p(pch_i2c_remove), + .remove = pch_i2c_remove, .suspend = pch_i2c_suspend, .resume = pch_i2c_resume }; diff --git a/drivers/i2c/busses/i2c-elektor.c b/drivers/i2c/busses/i2c-elektor.c index 37e2e82a9c88..485497066ed7 100644 --- a/drivers/i2c/busses/i2c-elektor.c +++ b/drivers/i2c/busses/i2c-elektor.c @@ -205,7 +205,7 @@ static struct i2c_adapter pcf_isa_ops = { .name = "i2c-elektor", }; -static int __devinit elektor_match(struct device *dev, unsigned int id) +static int elektor_match(struct device *dev, unsigned int id) { #ifdef __alpha__ /* check to see we have memory mapped PCF8584 connected to the @@ -264,7 +264,7 @@ static int __devinit elektor_match(struct device *dev, unsigned int id) return 1; } -static int __devinit elektor_probe(struct device *dev, unsigned int id) +static int elektor_probe(struct device *dev, unsigned int id) { init_waitqueue_head(&pcf_wait); if (pcf_isa_init()) @@ -293,7 +293,7 @@ static int __devinit elektor_probe(struct device *dev, unsigned int id) return -ENODEV; } -static int __devexit elektor_remove(struct device *dev, unsigned int id) +static int elektor_remove(struct device *dev, unsigned int id) { i2c_del_adapter(&pcf_isa_ops); @@ -316,7 +316,7 @@ static int __devexit elektor_remove(struct device *dev, unsigned int id) static struct isa_driver i2c_elektor_driver = { .match = elektor_match, .probe = elektor_probe, - .remove = __devexit_p(elektor_remove), + .remove = elektor_remove, .driver = { .owner = THIS_MODULE, .name = "i2c-elektor", diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c index e62d2d938628..f3fa4332bbdf 100644 --- a/drivers/i2c/busses/i2c-gpio.c +++ b/drivers/i2c/busses/i2c-gpio.c @@ -85,7 +85,7 @@ static int i2c_gpio_getscl(void *data) return gpio_get_value(pdata->scl_pin); } -static int __devinit of_i2c_gpio_probe(struct device_node *np, +static int of_i2c_gpio_probe(struct device_node *np, struct i2c_gpio_platform_data *pdata) { u32 reg; @@ -117,7 +117,7 @@ static int __devinit of_i2c_gpio_probe(struct device_node *np, return 0; } -static int __devinit i2c_gpio_probe(struct platform_device *pdev) +static int i2c_gpio_probe(struct platform_device *pdev) { struct i2c_gpio_private_data *priv; struct i2c_gpio_platform_data *pdata; @@ -184,7 +184,11 @@ static int __devinit i2c_gpio_probe(struct platform_device *pdev) bit_data->data = pdata; adap->owner = THIS_MODULE; - snprintf(adap->name, sizeof(adap->name), "i2c-gpio%d", pdev->id); + if (pdev->dev.of_node) + strlcpy(adap->name, dev_name(&pdev->dev), sizeof(adap->name)); + else + snprintf(adap->name, sizeof(adap->name), "i2c-gpio%d", pdev->id); + adap->algo_data = bit_data; adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; adap->dev.parent = &pdev->dev; @@ -214,7 +218,7 @@ err_request_sda: return ret; } -static int __devexit i2c_gpio_remove(struct platform_device *pdev) +static int i2c_gpio_remove(struct platform_device *pdev) { struct i2c_gpio_private_data *priv; struct i2c_gpio_platform_data *pdata; @@ -247,7 +251,7 @@ static struct platform_driver i2c_gpio_driver = { .of_match_table = of_match_ptr(i2c_gpio_dt_ids), }, .probe = i2c_gpio_probe, - .remove = __devexit_p(i2c_gpio_remove), + .remove = i2c_gpio_remove, }; static int __init i2c_gpio_init(void) diff --git a/drivers/i2c/busses/i2c-highlander.c b/drivers/i2c/busses/i2c-highlander.c index 19515df61021..436b0f254916 100644 --- a/drivers/i2c/busses/i2c-highlander.c +++ b/drivers/i2c/busses/i2c-highlander.c @@ -356,7 +356,7 @@ static const struct i2c_algorithm highlander_i2c_algo = { .functionality = highlander_i2c_func, }; -static int __devinit highlander_i2c_probe(struct platform_device *pdev) +static int highlander_i2c_probe(struct platform_device *pdev) { struct highlander_i2c_dev *dev; struct i2c_adapter *adap; @@ -436,12 +436,10 @@ err_unmap: err: kfree(dev); - platform_set_drvdata(pdev, NULL); - return ret; } -static int __devexit highlander_i2c_remove(struct platform_device *pdev) +static int highlander_i2c_remove(struct platform_device *pdev) { struct highlander_i2c_dev *dev = platform_get_drvdata(pdev); @@ -453,8 +451,6 @@ static int __devexit highlander_i2c_remove(struct platform_device *pdev) iounmap(dev->base); kfree(dev); - platform_set_drvdata(pdev, NULL); - return 0; } @@ -465,7 +461,7 @@ static struct platform_driver highlander_i2c_driver = { }, .probe = highlander_i2c_probe, - .remove = __devexit_p(highlander_i2c_remove), + .remove = highlander_i2c_remove, }; module_platform_driver(highlander_i2c_driver); diff --git a/drivers/i2c/busses/i2c-hydra.c b/drivers/i2c/busses/i2c-hydra.c index c9f95e1666a8..79c3d9069a48 100644 --- a/drivers/i2c/busses/i2c-hydra.c +++ b/drivers/i2c/busses/i2c-hydra.c @@ -112,7 +112,7 @@ static DEFINE_PCI_DEVICE_TABLE(hydra_ids) = { MODULE_DEVICE_TABLE (pci, hydra_ids); -static int __devinit hydra_probe(struct pci_dev *dev, +static int hydra_probe(struct pci_dev *dev, const struct pci_device_id *id) { unsigned long base = pci_resource_start(dev, 0); @@ -139,7 +139,7 @@ static int __devinit hydra_probe(struct pci_dev *dev, return 0; } -static void __devexit hydra_remove(struct pci_dev *dev) +static void hydra_remove(struct pci_dev *dev) { pdregw(hydra_bit_data.data, 0); /* clear SCLK_OE and SDAT_OE */ i2c_del_adapter(&hydra_adap); @@ -153,7 +153,7 @@ static struct pci_driver hydra_driver = { .name = "hydra_smbus", .id_table = hydra_ids, .probe = hydra_probe, - .remove = __devexit_p(hydra_remove), + .remove = hydra_remove, }; module_pci_driver(hydra_driver); diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 6abc00d59881..e1cf2e0e1f23 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -53,6 +53,11 @@ Panther Point (PCH) 0x1e22 32 hard yes yes yes Lynx Point (PCH) 0x8c22 32 hard yes yes yes Lynx Point-LP (PCH) 0x9c22 32 hard yes yes yes + Avoton (SOC) 0x1f3c 32 hard yes yes yes + Wellsburg (PCH) 0x8d22 32 hard yes yes yes + Wellsburg (PCH) MS 0x8d7d 32 hard yes yes yes + Wellsburg (PCH) MS 0x8d7e 32 hard yes yes yes + Wellsburg (PCH) MS 0x8d7f 32 hard yes yes yes Features supported by this driver: Software PEC no @@ -81,6 +86,7 @@ #include <linux/slab.h> #include <linux/wait.h> #include <linux/err.h> +#include <linux/of_i2c.h> #if (defined CONFIG_I2C_MUX_GPIO || defined CONFIG_I2C_MUX_GPIO_MODULE) && \ defined CONFIG_DMI @@ -161,9 +167,14 @@ #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1 0x1d71 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2 0x1d72 #define PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS 0x1e22 +#define PCI_DEVICE_ID_INTEL_AVOTON_SMBUS 0x1f3c #define PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS 0x2330 #define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22 +#define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS 0x8d22 +#define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0 0x8d7d +#define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1 0x8d7e +#define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2 0x8d7f #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS 0x9c22 struct i801_mux_config { @@ -797,6 +808,11 @@ static DEFINE_PCI_DEVICE_TABLE(i801_ids) = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_AVOTON_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2) }, { 0, } }; @@ -840,14 +856,14 @@ struct dmi_onboard_device_info { const char *i2c_type; }; -static struct dmi_onboard_device_info __devinitdata dmi_devices[] = { +static const struct dmi_onboard_device_info dmi_devices[] = { { "Syleus", DMI_DEV_TYPE_OTHER, 0x73, "fscsyl" }, { "Hermes", DMI_DEV_TYPE_OTHER, 0x73, "fscher" }, { "Hades", DMI_DEV_TYPE_OTHER, 0x73, "fschds" }, }; -static void __devinit dmi_check_onboard_device(u8 type, const char *name, - struct i2c_adapter *adap) +static void dmi_check_onboard_device(u8 type, const char *name, + struct i2c_adapter *adap) { int i; struct i2c_board_info info; @@ -870,8 +886,7 @@ static void __devinit dmi_check_onboard_device(u8 type, const char *name, /* We use our own function to check for onboard devices instead of dmi_find_device() as some buggy BIOS's have the devices we are interested in marked as disabled */ -static void __devinit dmi_check_onboard_devices(const struct dmi_header *dm, - void *adap) +static void dmi_check_onboard_devices(const struct dmi_header *dm, void *adap) { int i, count; @@ -900,7 +915,7 @@ static void __devinit dmi_check_onboard_devices(const struct dmi_header *dm, } /* Register optional slaves */ -static void __devinit i801_probe_optional_slaves(struct i801_priv *priv) +static void i801_probe_optional_slaves(struct i801_priv *priv) { /* Only register slaves on main SMBus channel */ if (priv->features & FEATURE_IDF) @@ -920,7 +935,7 @@ static void __devinit i801_probe_optional_slaves(struct i801_priv *priv) } #else static void __init input_apanel_init(void) {} -static void __devinit i801_probe_optional_slaves(struct i801_priv *priv) {} +static void i801_probe_optional_slaves(struct i801_priv *priv) {} #endif /* CONFIG_X86 && CONFIG_DMI */ #if (defined CONFIG_I2C_MUX_GPIO || defined CONFIG_I2C_MUX_GPIO_MODULE) && \ @@ -943,7 +958,7 @@ static struct i801_mux_config i801_mux_config_asus_z8_d18 = { .n_gpios = 2, }; -static struct dmi_system_id __devinitdata mux_dmi_table[] = { +static const struct dmi_system_id mux_dmi_table[] = { { .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), @@ -1011,7 +1026,7 @@ static struct dmi_system_id __devinitdata mux_dmi_table[] = { }; /* Setup multiplexing if needed */ -static int __devinit i801_add_mux(struct i801_priv *priv) +static int i801_add_mux(struct i801_priv *priv) { struct device *dev = &priv->adapter.dev; const struct i801_mux_config *mux_config; @@ -1047,13 +1062,13 @@ static int __devinit i801_add_mux(struct i801_priv *priv) return 0; } -static void __devexit i801_del_mux(struct i801_priv *priv) +static void i801_del_mux(struct i801_priv *priv) { if (priv->mux_pdev) platform_device_unregister(priv->mux_pdev); } -static unsigned int __devinit i801_get_adapter_class(struct i801_priv *priv) +static unsigned int i801_get_adapter_class(struct i801_priv *priv) { const struct dmi_system_id *id; const struct i801_mux_config *mux_config; @@ -1083,8 +1098,7 @@ static inline unsigned int i801_get_adapter_class(struct i801_priv *priv) } #endif -static int __devinit i801_probe(struct pci_dev *dev, - const struct pci_device_id *id) +static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id) { unsigned char temp; int err, i; @@ -1104,10 +1118,14 @@ static int __devinit i801_probe(struct pci_dev *dev, case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF0: case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF1: case PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS_IDF2: + case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0: + case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1: + case PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2: priv->features |= FEATURE_IDF; /* fall through */ default: priv->features |= FEATURE_I2C_BLOCK_READ; + priv->features |= FEATURE_IRQ; /* fall through */ case PCI_DEVICE_ID_INTEL_82801DB_3: priv->features |= FEATURE_SMBUS_PEC; @@ -1120,16 +1138,6 @@ static int __devinit i801_probe(struct pci_dev *dev, break; } - /* IRQ processing tested on CougarPoint PCH, ICH5, ICH7-M and ICH10 */ - if (dev->device == PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS || - dev->device == PCI_DEVICE_ID_INTEL_82801EB_3 || - dev->device == PCI_DEVICE_ID_INTEL_ICH7_17 || - dev->device == PCI_DEVICE_ID_INTEL_ICH8_5 || - dev->device == PCI_DEVICE_ID_INTEL_ICH9_6 || - dev->device == PCI_DEVICE_ID_INTEL_ICH10_4 || - dev->device == PCI_DEVICE_ID_INTEL_ICH10_5) - priv->features |= FEATURE_IRQ; - /* Disable features on user request */ for (i = 0; i < ARRAY_SIZE(i801_feature_names); i++) { if (priv->features & disable_features & (1 << i)) @@ -1215,6 +1223,7 @@ static int __devinit i801_probe(struct pci_dev *dev, goto exit_free_irq; } + of_i2c_register_devices(&priv->adapter); i801_probe_optional_slaves(priv); /* We ignore errors - multiplexing is optional */ i801_add_mux(priv); @@ -1233,7 +1242,7 @@ exit: return err; } -static void __devexit i801_remove(struct pci_dev *dev) +static void i801_remove(struct pci_dev *dev) { struct i801_priv *priv = pci_get_drvdata(dev); @@ -1245,7 +1254,6 @@ static void __devexit i801_remove(struct pci_dev *dev) free_irq(dev->irq, priv); pci_release_region(dev, SMBBAR); - pci_set_drvdata(dev, NULL); kfree(priv); /* * do not call pci_disable_device(dev) since it can cause hard hangs on @@ -1279,7 +1287,7 @@ static struct pci_driver i801_driver = { .name = "i801_smbus", .id_table = i801_ids, .probe = i801_probe, - .remove = __devexit_p(i801_remove), + .remove = i801_remove, .suspend = i801_suspend, .resume = i801_resume, }; diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c index 806e225f3de7..405a2e240454 100644 --- a/drivers/i2c/busses/i2c-ibm_iic.c +++ b/drivers/i2c/busses/i2c-ibm_iic.c @@ -660,7 +660,7 @@ static inline u8 iic_clckdiv(unsigned int opb) return (u8)((opb + 9) / 10 - 1); } -static int __devinit iic_request_irq(struct platform_device *ofdev, +static int iic_request_irq(struct platform_device *ofdev, struct ibm_iic_private *dev) { struct device_node *np = ofdev->dev.of_node; @@ -691,7 +691,7 @@ static int __devinit iic_request_irq(struct platform_device *ofdev, /* * Register single IIC interface */ -static int __devinit iic_probe(struct platform_device *ofdev) +static int iic_probe(struct platform_device *ofdev) { struct device_node *np = ofdev->dev.of_node; struct ibm_iic_private *dev; @@ -773,7 +773,6 @@ error_cleanup: if (dev->vaddr) iounmap(dev->vaddr); - dev_set_drvdata(&ofdev->dev, NULL); kfree(dev); return ret; } @@ -781,12 +780,10 @@ error_cleanup: /* * Cleanup initialized IIC interface */ -static int __devexit iic_remove(struct platform_device *ofdev) +static int iic_remove(struct platform_device *ofdev) { struct ibm_iic_private *dev = dev_get_drvdata(&ofdev->dev); - dev_set_drvdata(&ofdev->dev, NULL); - i2c_del_adapter(&dev->adap); if (dev->irq) { @@ -812,7 +809,7 @@ static struct platform_driver ibm_iic_driver = { .of_match_table = ibm_iic_match, }, .probe = iic_probe, - .remove = __devexit_p(iic_remove), + .remove = iic_remove, }; module_platform_driver(ibm_iic_driver); diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 2ef162d148cb..82f20c60bb7b 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -52,8 +52,6 @@ #include <linux/of_device.h> #include <linux/of_i2c.h> #include <linux/pinctrl/consumer.h> - -#include <mach/hardware.h> #include <linux/platform_data/i2c-imx.h> /** Defines ******************************************************************** @@ -115,6 +113,11 @@ static u16 __initdata i2c_clk_div[50][2] = { { 3072, 0x1E }, { 3840, 0x1F } }; +enum imx_i2c_type { + IMX1_I2C, + IMX21_I2C, +}; + struct imx_i2c_struct { struct i2c_adapter adapter; struct clk *clk; @@ -124,13 +127,33 @@ struct imx_i2c_struct { unsigned int disable_delay; int stopped; unsigned int ifdr; /* IMX_I2C_IFDR */ + enum imx_i2c_type devtype; +}; + +static struct platform_device_id imx_i2c_devtype[] = { + { + .name = "imx1-i2c", + .driver_data = IMX1_I2C, + }, { + .name = "imx21-i2c", + .driver_data = IMX21_I2C, + }, { + /* sentinel */ + } }; +MODULE_DEVICE_TABLE(platform, imx_i2c_devtype); static const struct of_device_id i2c_imx_dt_ids[] = { - { .compatible = "fsl,imx1-i2c", }, + { .compatible = "fsl,imx1-i2c", .data = &imx_i2c_devtype[IMX1_I2C], }, + { .compatible = "fsl,imx21-i2c", .data = &imx_i2c_devtype[IMX21_I2C], }, { /* sentinel */ } }; +static inline int is_imx1_i2c(struct imx_i2c_struct *i2c_imx) +{ + return i2c_imx->devtype == IMX1_I2C; +} + /** Functions for IMX I2C adapter driver *************************************** *******************************************************************************/ @@ -223,7 +246,7 @@ static void i2c_imx_stop(struct imx_i2c_struct *i2c_imx) temp &= ~(I2CR_MSTA | I2CR_MTX); writeb(temp, i2c_imx->base + IMX_I2C_I2CR); } - if (cpu_is_mx1()) { + if (is_imx1_i2c(i2c_imx)) { /* * This delay caused by an i.MXL hardware bug. * If no (or too short) delay, no "STOP" bit will be generated. @@ -465,6 +488,8 @@ static struct i2c_algorithm i2c_imx_algo = { static int __init i2c_imx_probe(struct platform_device *pdev) { + const struct of_device_id *of_id = of_match_device(i2c_imx_dt_ids, + &pdev->dev); struct imx_i2c_struct *i2c_imx; struct resource *res; struct imxi2c_platform_data *pdata = pdev->dev.platform_data; @@ -486,9 +511,9 @@ static int __init i2c_imx_probe(struct platform_device *pdev) return -ENOENT; } - base = devm_request_and_ioremap(&pdev->dev, res); - if (!base) - return -EBUSY; + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); i2c_imx = devm_kzalloc(&pdev->dev, sizeof(struct imx_i2c_struct), GFP_KERNEL); @@ -497,6 +522,10 @@ static int __init i2c_imx_probe(struct platform_device *pdev) return -ENOMEM; } + if (of_id) + pdev->id_entry = of_id->data; + i2c_imx->devtype = pdev->id_entry->driver_data; + /* Setup i2c_imx driver structure */ strlcpy(i2c_imx->adapter.name, pdev->name, sizeof(i2c_imx->adapter.name)); i2c_imx->adapter.owner = THIS_MODULE; @@ -576,7 +605,6 @@ static int __exit i2c_imx_remove(struct platform_device *pdev) /* remove adapter */ dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n"); i2c_del_adapter(&i2c_imx->adapter); - platform_set_drvdata(pdev, NULL); /* setup chip registers to defaults */ writeb(0, i2c_imx->base + IMX_I2C_IADR); @@ -593,7 +621,8 @@ static struct platform_driver i2c_imx_driver = { .name = DRIVER_NAME, .owner = THIS_MODULE, .of_match_table = i2c_imx_dt_ids, - } + }, + .id_table = imx_i2c_devtype, }; static int __init i2c_adap_imx_init(void) diff --git a/drivers/i2c/busses/i2c-intel-mid.c b/drivers/i2c/busses/i2c-intel-mid.c index 7c28f10f95ca..323fa018ffd5 100644 --- a/drivers/i2c/busses/i2c-intel-mid.c +++ b/drivers/i2c/busses/i2c-intel-mid.c @@ -947,7 +947,7 @@ static const struct dev_pm_ops intel_mid_i2c_pm_ops = { * 5. Call intel_mid_i2c_hwinit() for hardware initialization * 6. Register I2C adapter in i2c-core */ -static int __devinit intel_mid_i2c_probe(struct pci_dev *dev, +static int intel_mid_i2c_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct intel_mid_i2c_private *mrst; @@ -1069,7 +1069,6 @@ static int __devinit intel_mid_i2c_probe(struct pci_dev *dev, fail3: free_irq(dev->irq, mrst); fail2: - pci_set_drvdata(dev, NULL); kfree(mrst); fail1: iounmap(base); @@ -1079,7 +1078,7 @@ exit: return err; } -static void __devexit intel_mid_i2c_remove(struct pci_dev *dev) +static void intel_mid_i2c_remove(struct pci_dev *dev) { struct intel_mid_i2c_private *mrst = pci_get_drvdata(dev); intel_mid_i2c_disable(&mrst->adap); @@ -1087,7 +1086,6 @@ static void __devexit intel_mid_i2c_remove(struct pci_dev *dev) dev_err(&dev->dev, "Failed to delete i2c adapter"); free_irq(dev->irq, mrst); - pci_set_drvdata(dev, NULL); iounmap(mrst->base); kfree(mrst); pci_release_region(dev, 0); @@ -1113,7 +1111,7 @@ static struct pci_driver intel_mid_i2c_driver = { .name = DRIVER_NAME, .id_table = intel_mid_i2c_ids, .probe = intel_mid_i2c_probe, - .remove = __devexit_p(intel_mid_i2c_remove), + .remove = intel_mid_i2c_remove, }; module_pci_driver(intel_mid_i2c_driver); diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c index 2f99613fd677..bc993331c695 100644 --- a/drivers/i2c/busses/i2c-iop3xx.c +++ b/drivers/i2c/busses/i2c-iop3xx.c @@ -415,8 +415,6 @@ iop3xx_i2c_remove(struct platform_device *pdev) kfree(adapter_data); kfree(padapter); - platform_set_drvdata(pdev, NULL); - return 0; } diff --git a/drivers/i2c/busses/i2c-isch.c b/drivers/i2c/busses/i2c-isch.c index f90a6057508d..8c38aaa7417c 100644 --- a/drivers/i2c/busses/i2c-isch.c +++ b/drivers/i2c/busses/i2c-isch.c @@ -40,6 +40,7 @@ /* SCH SMBus address offsets */ #define SMBHSTCNT (0 + sch_smba) #define SMBHSTSTS (1 + sch_smba) +#define SMBHSTCLK (2 + sch_smba) #define SMBHSTADD (4 + sch_smba) /* TSA */ #define SMBHSTCMD (5 + sch_smba) #define SMBHSTDAT0 (6 + sch_smba) @@ -58,6 +59,9 @@ static unsigned short sch_smba; static struct i2c_adapter sch_adapter; +static int backbone_speed = 33000; /* backbone speed in kHz */ +module_param(backbone_speed, int, S_IRUSR | S_IWUSR); +MODULE_PARM_DESC(backbone_speed, "Backbone speed in kHz, (default = 33000)"); /* * Start the i2c transaction -- the i2c_access will prepare the transaction @@ -156,6 +160,19 @@ static s32 sch_access(struct i2c_adapter *adap, u16 addr, dev_dbg(&sch_adapter.dev, "SMBus busy (%02x)\n", temp); return -EAGAIN; } + temp = inw(SMBHSTCLK); + if (!temp) { + /* + * We can't determine if we have 33 or 25 MHz clock for + * SMBus, so expect 33 MHz and calculate a bus clock of + * 100 kHz. If we actually run at 25 MHz the bus will be + * run ~75 kHz instead which should do no harm. + */ + dev_notice(&sch_adapter.dev, + "Clock divider unitialized. Setting defaults\n"); + outw(backbone_speed / (4 * 100), SMBHSTCLK); + } + dev_dbg(&sch_adapter.dev, "access size: %d %s\n", size, (read_write)?"READ":"WRITE"); switch (size) { @@ -249,7 +266,7 @@ static struct i2c_adapter sch_adapter = { .algo = &smbus_algorithm, }; -static int __devinit smbus_sch_probe(struct platform_device *dev) +static int smbus_sch_probe(struct platform_device *dev) { struct resource *res; int retval; @@ -284,7 +301,7 @@ static int __devinit smbus_sch_probe(struct platform_device *dev) return retval; } -static int __devexit smbus_sch_remove(struct platform_device *pdev) +static int smbus_sch_remove(struct platform_device *pdev) { struct resource *res; if (sch_smba) { @@ -303,7 +320,7 @@ static struct platform_driver smbus_sch_driver = { .owner = THIS_MODULE, }, .probe = smbus_sch_probe, - .remove = __devexit_p(smbus_sch_remove), + .remove = smbus_sch_remove, }; module_platform_driver(smbus_sch_driver); diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c new file mode 100644 index 000000000000..e9205ee8cf94 --- /dev/null +++ b/drivers/i2c/busses/i2c-ismt.c @@ -0,0 +1,963 @@ +/* + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * Copyright(c) 2012 Intel Corporation. All rights reserved. + * + * GPL LICENSE SUMMARY + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * The full GNU General Public License is included in this distribution + * in the file called LICENSE.GPL. + * + * BSD LICENSE + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Supports the SMBus Message Transport (SMT) in the Intel Atom Processor + * S12xx Product Family. + * + * Features supported by this driver: + * Hardware PEC yes + * Block buffer yes + * Block process call transaction no + * Slave mode no + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/stddef.h> +#include <linux/completion.h> +#include <linux/dma-mapping.h> +#include <linux/i2c.h> +#include <linux/acpi.h> +#include <linux/interrupt.h> + +#include <asm-generic/io-64-nonatomic-lo-hi.h> + +/* PCI Address Constants */ +#define SMBBAR 0 + +/* PCI DIDs for the Intel SMBus Message Transport (SMT) Devices */ +#define PCI_DEVICE_ID_INTEL_S1200_SMT0 0x0c59 +#define PCI_DEVICE_ID_INTEL_S1200_SMT1 0x0c5a + +#define ISMT_DESC_ENTRIES 32 /* number of descriptor entries */ +#define ISMT_MAX_RETRIES 3 /* number of SMBus retries to attempt */ + +/* Hardware Descriptor Constants - Control Field */ +#define ISMT_DESC_CWRL 0x01 /* Command/Write Length */ +#define ISMT_DESC_BLK 0X04 /* Perform Block Transaction */ +#define ISMT_DESC_FAIR 0x08 /* Set fairness flag upon successful arbit. */ +#define ISMT_DESC_PEC 0x10 /* Packet Error Code */ +#define ISMT_DESC_I2C 0x20 /* I2C Enable */ +#define ISMT_DESC_INT 0x40 /* Interrupt */ +#define ISMT_DESC_SOE 0x80 /* Stop On Error */ + +/* Hardware Descriptor Constants - Status Field */ +#define ISMT_DESC_SCS 0x01 /* Success */ +#define ISMT_DESC_DLTO 0x04 /* Data Low Time Out */ +#define ISMT_DESC_NAK 0x08 /* NAK Received */ +#define ISMT_DESC_CRC 0x10 /* CRC Error */ +#define ISMT_DESC_CLTO 0x20 /* Clock Low Time Out */ +#define ISMT_DESC_COL 0x40 /* Collisions */ +#define ISMT_DESC_LPR 0x80 /* Large Packet Received */ + +/* Macros */ +#define ISMT_DESC_ADDR_RW(addr, rw) (((addr) << 1) | (rw)) + +/* iSMT General Register address offsets (SMBBAR + <addr>) */ +#define ISMT_GR_GCTRL 0x000 /* General Control */ +#define ISMT_GR_SMTICL 0x008 /* SMT Interrupt Cause Location */ +#define ISMT_GR_ERRINTMSK 0x010 /* Error Interrupt Mask */ +#define ISMT_GR_ERRAERMSK 0x014 /* Error AER Mask */ +#define ISMT_GR_ERRSTS 0x018 /* Error Status */ +#define ISMT_GR_ERRINFO 0x01c /* Error Information */ + +/* iSMT Master Registers */ +#define ISMT_MSTR_MDBA 0x100 /* Master Descriptor Base Address */ +#define ISMT_MSTR_MCTRL 0x108 /* Master Control */ +#define ISMT_MSTR_MSTS 0x10c /* Master Status */ +#define ISMT_MSTR_MDS 0x110 /* Master Descriptor Size */ +#define ISMT_MSTR_RPOLICY 0x114 /* Retry Policy */ + +/* iSMT Miscellaneous Registers */ +#define ISMT_SPGT 0x300 /* SMBus PHY Global Timing */ + +/* General Control Register (GCTRL) bit definitions */ +#define ISMT_GCTRL_TRST 0x04 /* Target Reset */ +#define ISMT_GCTRL_KILL 0x08 /* Kill */ +#define ISMT_GCTRL_SRST 0x40 /* Soft Reset */ + +/* Master Control Register (MCTRL) bit definitions */ +#define ISMT_MCTRL_SS 0x01 /* Start/Stop */ +#define ISMT_MCTRL_MEIE 0x10 /* Master Error Interrupt Enable */ +#define ISMT_MCTRL_FMHP 0x00ff0000 /* Firmware Master Head Ptr (FMHP) */ + +/* Master Status Register (MSTS) bit definitions */ +#define ISMT_MSTS_HMTP 0xff0000 /* HW Master Tail Pointer (HMTP) */ +#define ISMT_MSTS_MIS 0x20 /* Master Interrupt Status (MIS) */ +#define ISMT_MSTS_MEIS 0x10 /* Master Error Int Status (MEIS) */ +#define ISMT_MSTS_IP 0x01 /* In Progress */ + +/* Master Descriptor Size (MDS) bit definitions */ +#define ISMT_MDS_MASK 0xff /* Master Descriptor Size mask (MDS) */ + +/* SMBus PHY Global Timing Register (SPGT) bit definitions */ +#define ISMT_SPGT_SPD_MASK 0xc0000000 /* SMBus Speed mask */ +#define ISMT_SPGT_SPD_80K 0x00 /* 80 kHz */ +#define ISMT_SPGT_SPD_100K (0x1 << 30) /* 100 kHz */ +#define ISMT_SPGT_SPD_400K (0x2 << 30) /* 400 kHz */ +#define ISMT_SPGT_SPD_1M (0x3 << 30) /* 1 MHz */ + + +/* MSI Control Register (MSICTL) bit definitions */ +#define ISMT_MSICTL_MSIE 0x01 /* MSI Enable */ + +/* iSMT Hardware Descriptor */ +struct ismt_desc { + u8 tgtaddr_rw; /* target address & r/w bit */ + u8 wr_len_cmd; /* write length in bytes or a command */ + u8 rd_len; /* read length */ + u8 control; /* control bits */ + u8 status; /* status bits */ + u8 retry; /* collision retry and retry count */ + u8 rxbytes; /* received bytes */ + u8 txbytes; /* transmitted bytes */ + u32 dptr_low; /* lower 32 bit of the data pointer */ + u32 dptr_high; /* upper 32 bit of the data pointer */ +} __packed; + +struct ismt_priv { + struct i2c_adapter adapter; + void *smba; /* PCI BAR */ + struct pci_dev *pci_dev; + struct ismt_desc *hw; /* descriptor virt base addr */ + dma_addr_t io_rng_dma; /* descriptor HW base addr */ + u8 head; /* ring buffer head pointer */ + struct completion cmp; /* interrupt completion */ + u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* temp R/W data buffer */ + bool using_msi; /* type of interrupt flag */ +}; + +/** + * ismt_ids - PCI device IDs supported by this driver + */ +static const DEFINE_PCI_DEVICE_TABLE(ismt_ids) = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_S1200_SMT0) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_S1200_SMT1) }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, ismt_ids); + +/* Bus speed control bits for slow debuggers - refer to the docs for usage */ +static unsigned int bus_speed; +module_param(bus_speed, uint, S_IRUGO); +MODULE_PARM_DESC(bus_speed, "Bus Speed in kHz (0 = BIOS default)"); + +/** + * __ismt_desc_dump() - dump the contents of a specific descriptor + */ +static void __ismt_desc_dump(struct device *dev, const struct ismt_desc *desc) +{ + + dev_dbg(dev, "Descriptor struct: %p\n", desc); + dev_dbg(dev, "\ttgtaddr_rw=0x%02X\n", desc->tgtaddr_rw); + dev_dbg(dev, "\twr_len_cmd=0x%02X\n", desc->wr_len_cmd); + dev_dbg(dev, "\trd_len= 0x%02X\n", desc->rd_len); + dev_dbg(dev, "\tcontrol= 0x%02X\n", desc->control); + dev_dbg(dev, "\tstatus= 0x%02X\n", desc->status); + dev_dbg(dev, "\tretry= 0x%02X\n", desc->retry); + dev_dbg(dev, "\trxbytes= 0x%02X\n", desc->rxbytes); + dev_dbg(dev, "\ttxbytes= 0x%02X\n", desc->txbytes); + dev_dbg(dev, "\tdptr_low= 0x%08X\n", desc->dptr_low); + dev_dbg(dev, "\tdptr_high= 0x%08X\n", desc->dptr_high); +} +/** + * ismt_desc_dump() - dump the contents of a descriptor for debug purposes + * @priv: iSMT private data + */ +static void ismt_desc_dump(struct ismt_priv *priv) +{ + struct device *dev = &priv->pci_dev->dev; + struct ismt_desc *desc = &priv->hw[priv->head]; + + dev_dbg(dev, "Dump of the descriptor struct: 0x%X\n", priv->head); + __ismt_desc_dump(dev, desc); +} + +/** + * ismt_gen_reg_dump() - dump the iSMT General Registers + * @priv: iSMT private data + */ +static void ismt_gen_reg_dump(struct ismt_priv *priv) +{ + struct device *dev = &priv->pci_dev->dev; + + dev_dbg(dev, "Dump of the iSMT General Registers\n"); + dev_dbg(dev, " GCTRL.... : (0x%p)=0x%X\n", + priv->smba + ISMT_GR_GCTRL, + readl(priv->smba + ISMT_GR_GCTRL)); + dev_dbg(dev, " SMTICL... : (0x%p)=0x%016llX\n", + priv->smba + ISMT_GR_SMTICL, + (long long unsigned int)readq(priv->smba + ISMT_GR_SMTICL)); + dev_dbg(dev, " ERRINTMSK : (0x%p)=0x%X\n", + priv->smba + ISMT_GR_ERRINTMSK, + readl(priv->smba + ISMT_GR_ERRINTMSK)); + dev_dbg(dev, " ERRAERMSK : (0x%p)=0x%X\n", + priv->smba + ISMT_GR_ERRAERMSK, + readl(priv->smba + ISMT_GR_ERRAERMSK)); + dev_dbg(dev, " ERRSTS... : (0x%p)=0x%X\n", + priv->smba + ISMT_GR_ERRSTS, + readl(priv->smba + ISMT_GR_ERRSTS)); + dev_dbg(dev, " ERRINFO.. : (0x%p)=0x%X\n", + priv->smba + ISMT_GR_ERRINFO, + readl(priv->smba + ISMT_GR_ERRINFO)); +} + +/** + * ismt_mstr_reg_dump() - dump the iSMT Master Registers + * @priv: iSMT private data + */ +static void ismt_mstr_reg_dump(struct ismt_priv *priv) +{ + struct device *dev = &priv->pci_dev->dev; + + dev_dbg(dev, "Dump of the iSMT Master Registers\n"); + dev_dbg(dev, " MDBA..... : (0x%p)=0x%016llX\n", + priv->smba + ISMT_MSTR_MDBA, + (long long unsigned int)readq(priv->smba + ISMT_MSTR_MDBA)); + dev_dbg(dev, " MCTRL.... : (0x%p)=0x%X\n", + priv->smba + ISMT_MSTR_MCTRL, + readl(priv->smba + ISMT_MSTR_MCTRL)); + dev_dbg(dev, " MSTS..... : (0x%p)=0x%X\n", + priv->smba + ISMT_MSTR_MSTS, + readl(priv->smba + ISMT_MSTR_MSTS)); + dev_dbg(dev, " MDS...... : (0x%p)=0x%X\n", + priv->smba + ISMT_MSTR_MDS, + readl(priv->smba + ISMT_MSTR_MDS)); + dev_dbg(dev, " RPOLICY.. : (0x%p)=0x%X\n", + priv->smba + ISMT_MSTR_RPOLICY, + readl(priv->smba + ISMT_MSTR_RPOLICY)); + dev_dbg(dev, " SPGT..... : (0x%p)=0x%X\n", + priv->smba + ISMT_SPGT, + readl(priv->smba + ISMT_SPGT)); +} + +/** + * ismt_submit_desc() - add a descriptor to the ring + * @priv: iSMT private data + */ +static void ismt_submit_desc(struct ismt_priv *priv) +{ + uint fmhp; + uint val; + + ismt_desc_dump(priv); + ismt_gen_reg_dump(priv); + ismt_mstr_reg_dump(priv); + + /* Set the FMHP (Firmware Master Head Pointer)*/ + fmhp = ((priv->head + 1) % ISMT_DESC_ENTRIES) << 16; + val = readl(priv->smba + ISMT_MSTR_MCTRL); + writel((val & ~ISMT_MCTRL_FMHP) | fmhp, + priv->smba + ISMT_MSTR_MCTRL); + + /* Set the start bit */ + val = readl(priv->smba + ISMT_MSTR_MCTRL); + writel(val | ISMT_MCTRL_SS, + priv->smba + ISMT_MSTR_MCTRL); +} + +/** + * ismt_process_desc() - handle the completion of the descriptor + * @desc: the iSMT hardware descriptor + * @data: data buffer from the upper layer + * @priv: ismt_priv struct holding our dma buffer + * @size: SMBus transaction type + * @read_write: flag to indicate if this is a read or write + */ +static int ismt_process_desc(const struct ismt_desc *desc, + union i2c_smbus_data *data, + struct ismt_priv *priv, int size, + char read_write) +{ + u8 *dma_buffer = priv->dma_buffer; + + dev_dbg(&priv->pci_dev->dev, "Processing completed descriptor\n"); + __ismt_desc_dump(&priv->pci_dev->dev, desc); + + if (desc->status & ISMT_DESC_SCS) { + if (read_write == I2C_SMBUS_WRITE && + size != I2C_SMBUS_PROC_CALL) + return 0; + + switch (size) { + case I2C_SMBUS_BYTE: + case I2C_SMBUS_BYTE_DATA: + data->byte = dma_buffer[0]; + break; + case I2C_SMBUS_WORD_DATA: + case I2C_SMBUS_PROC_CALL: + data->word = dma_buffer[0] | (dma_buffer[1] << 8); + break; + case I2C_SMBUS_BLOCK_DATA: + memcpy(&data->block[1], dma_buffer, desc->rxbytes); + data->block[0] = desc->rxbytes; + break; + } + return 0; + } + + if (likely(desc->status & ISMT_DESC_NAK)) + return -ENXIO; + + if (desc->status & ISMT_DESC_CRC) + return -EBADMSG; + + if (desc->status & ISMT_DESC_COL) + return -EAGAIN; + + if (desc->status & ISMT_DESC_LPR) + return -EPROTO; + + if (desc->status & (ISMT_DESC_DLTO | ISMT_DESC_CLTO)) + return -ETIMEDOUT; + + return -EIO; +} + +/** + * ismt_access() - process an SMBus command + * @adap: the i2c host adapter + * @addr: address of the i2c/SMBus target + * @flags: command options + * @read_write: read from or write to device + * @command: the i2c/SMBus command to issue + * @size: SMBus transaction type + * @data: read/write data buffer + */ +static int ismt_access(struct i2c_adapter *adap, u16 addr, + unsigned short flags, char read_write, u8 command, + int size, union i2c_smbus_data *data) +{ + int ret; + dma_addr_t dma_addr = 0; /* address of the data buffer */ + u8 dma_size = 0; + enum dma_data_direction dma_direction = 0; + struct ismt_desc *desc; + struct ismt_priv *priv = i2c_get_adapdata(adap); + struct device *dev = &priv->pci_dev->dev; + + desc = &priv->hw[priv->head]; + + /* Initialize the descriptor */ + memset(desc, 0, sizeof(struct ismt_desc)); + desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write); + + /* Initialize common control bits */ + if (likely(priv->using_msi)) + desc->control = ISMT_DESC_INT | ISMT_DESC_FAIR; + else + desc->control = ISMT_DESC_FAIR; + + if ((flags & I2C_CLIENT_PEC) && (size != I2C_SMBUS_QUICK) + && (size != I2C_SMBUS_I2C_BLOCK_DATA)) + desc->control |= ISMT_DESC_PEC; + + switch (size) { + case I2C_SMBUS_QUICK: + dev_dbg(dev, "I2C_SMBUS_QUICK\n"); + break; + + case I2C_SMBUS_BYTE: + if (read_write == I2C_SMBUS_WRITE) { + /* + * Send Byte + * The command field contains the write data + */ + dev_dbg(dev, "I2C_SMBUS_BYTE: WRITE\n"); + desc->control |= ISMT_DESC_CWRL; + desc->wr_len_cmd = command; + } else { + /* Receive Byte */ + dev_dbg(dev, "I2C_SMBUS_BYTE: READ\n"); + dma_size = 1; + dma_direction = DMA_FROM_DEVICE; + desc->rd_len = 1; + } + break; + + case I2C_SMBUS_BYTE_DATA: + if (read_write == I2C_SMBUS_WRITE) { + /* + * Write Byte + * Command plus 1 data byte + */ + dev_dbg(dev, "I2C_SMBUS_BYTE_DATA: WRITE\n"); + desc->wr_len_cmd = 2; + dma_size = 2; + dma_direction = DMA_TO_DEVICE; + priv->dma_buffer[0] = command; + priv->dma_buffer[1] = data->byte; + } else { + /* Read Byte */ + dev_dbg(dev, "I2C_SMBUS_BYTE_DATA: READ\n"); + desc->control |= ISMT_DESC_CWRL; + desc->wr_len_cmd = command; + desc->rd_len = 1; + dma_size = 1; + dma_direction = DMA_FROM_DEVICE; + } + break; + + case I2C_SMBUS_WORD_DATA: + if (read_write == I2C_SMBUS_WRITE) { + /* Write Word */ + dev_dbg(dev, "I2C_SMBUS_WORD_DATA: WRITE\n"); + desc->wr_len_cmd = 3; + dma_size = 3; + dma_direction = DMA_TO_DEVICE; + priv->dma_buffer[0] = command; + priv->dma_buffer[1] = data->word & 0xff; + priv->dma_buffer[2] = data->word >> 8; + } else { + /* Read Word */ + dev_dbg(dev, "I2C_SMBUS_WORD_DATA: READ\n"); + desc->wr_len_cmd = command; + desc->control |= ISMT_DESC_CWRL; + desc->rd_len = 2; + dma_size = 2; + dma_direction = DMA_FROM_DEVICE; + } + break; + + case I2C_SMBUS_PROC_CALL: + dev_dbg(dev, "I2C_SMBUS_PROC_CALL\n"); + desc->wr_len_cmd = 3; + desc->rd_len = 2; + dma_size = 3; + dma_direction = DMA_BIDIRECTIONAL; + priv->dma_buffer[0] = command; + priv->dma_buffer[1] = data->word & 0xff; + priv->dma_buffer[2] = data->word >> 8; + break; + + case I2C_SMBUS_BLOCK_DATA: + if (read_write == I2C_SMBUS_WRITE) { + /* Block Write */ + dev_dbg(dev, "I2C_SMBUS_BLOCK_DATA: WRITE\n"); + dma_size = data->block[0] + 1; + dma_direction = DMA_TO_DEVICE; + desc->wr_len_cmd = dma_size; + desc->control |= ISMT_DESC_BLK; + priv->dma_buffer[0] = command; + memcpy(&priv->dma_buffer[1], &data->block[1], dma_size); + } else { + /* Block Read */ + dev_dbg(dev, "I2C_SMBUS_BLOCK_DATA: READ\n"); + dma_size = I2C_SMBUS_BLOCK_MAX; + dma_direction = DMA_FROM_DEVICE; + desc->rd_len = dma_size; + desc->wr_len_cmd = command; + desc->control |= (ISMT_DESC_BLK | ISMT_DESC_CWRL); + } + break; + + default: + dev_err(dev, "Unsupported transaction %d\n", + size); + return -EOPNOTSUPP; + } + + /* map the data buffer */ + if (dma_size != 0) { + dev_dbg(dev, " dev=%p\n", dev); + dev_dbg(dev, " data=%p\n", data); + dev_dbg(dev, " dma_buffer=%p\n", priv->dma_buffer); + dev_dbg(dev, " dma_size=%d\n", dma_size); + dev_dbg(dev, " dma_direction=%d\n", dma_direction); + + dma_addr = dma_map_single(dev, + priv->dma_buffer, + dma_size, + dma_direction); + + if (dma_mapping_error(dev, dma_addr)) { + dev_err(dev, "Error in mapping dma buffer %p\n", + priv->dma_buffer); + return -EIO; + } + + dev_dbg(dev, " dma_addr = 0x%016llX\n", + (unsigned long long)dma_addr); + + desc->dptr_low = lower_32_bits(dma_addr); + desc->dptr_high = upper_32_bits(dma_addr); + } + + INIT_COMPLETION(priv->cmp); + + /* Add the descriptor */ + ismt_submit_desc(priv); + + /* Now we wait for interrupt completion, 1s */ + ret = wait_for_completion_timeout(&priv->cmp, HZ*1); + + /* unmap the data buffer */ + if (dma_size != 0) + dma_unmap_single(&adap->dev, dma_addr, dma_size, dma_direction); + + if (unlikely(!ret)) { + dev_err(dev, "completion wait timed out\n"); + ret = -ETIMEDOUT; + goto out; + } + + /* do any post processing of the descriptor here */ + ret = ismt_process_desc(desc, data, priv, size, read_write); + +out: + /* Update the ring pointer */ + priv->head++; + priv->head %= ISMT_DESC_ENTRIES; + + return ret; +} + +/** + * ismt_func() - report which i2c commands are supported by this adapter + * @adap: the i2c host adapter + */ +static u32 ismt_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_SMBUS_QUICK | + I2C_FUNC_SMBUS_BYTE | + I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_WORD_DATA | + I2C_FUNC_SMBUS_PROC_CALL | + I2C_FUNC_SMBUS_BLOCK_DATA | + I2C_FUNC_SMBUS_PEC; +} + +/** + * smbus_algorithm - the adapter algorithm and supported functionality + * @smbus_xfer: the adapter algorithm + * @functionality: functionality supported by the adapter + */ +static const struct i2c_algorithm smbus_algorithm = { + .smbus_xfer = ismt_access, + .functionality = ismt_func, +}; + +/** + * ismt_handle_isr() - interrupt handler bottom half + * @priv: iSMT private data + */ +static irqreturn_t ismt_handle_isr(struct ismt_priv *priv) +{ + complete(&priv->cmp); + + return IRQ_HANDLED; +} + + +/** + * ismt_do_interrupt() - IRQ interrupt handler + * @vec: interrupt vector + * @data: iSMT private data + */ +static irqreturn_t ismt_do_interrupt(int vec, void *data) +{ + u32 val; + struct ismt_priv *priv = data; + + /* + * check to see it's our interrupt, return IRQ_NONE if not ours + * since we are sharing interrupt + */ + val = readl(priv->smba + ISMT_MSTR_MSTS); + + if (!(val & (ISMT_MSTS_MIS | ISMT_MSTS_MEIS))) + return IRQ_NONE; + else + writel(val | ISMT_MSTS_MIS | ISMT_MSTS_MEIS, + priv->smba + ISMT_MSTR_MSTS); + + return ismt_handle_isr(priv); +} + +/** + * ismt_do_msi_interrupt() - MSI interrupt handler + * @vec: interrupt vector + * @data: iSMT private data + */ +static irqreturn_t ismt_do_msi_interrupt(int vec, void *data) +{ + return ismt_handle_isr(data); +} + +/** + * ismt_hw_init() - initialize the iSMT hardware + * @priv: iSMT private data + */ +static void ismt_hw_init(struct ismt_priv *priv) +{ + u32 val; + struct device *dev = &priv->pci_dev->dev; + + /* initialize the Master Descriptor Base Address (MDBA) */ + writeq(priv->io_rng_dma, priv->smba + ISMT_MSTR_MDBA); + + /* initialize the Master Control Register (MCTRL) */ + writel(ISMT_MCTRL_MEIE, priv->smba + ISMT_MSTR_MCTRL); + + /* initialize the Master Status Register (MSTS) */ + writel(0, priv->smba + ISMT_MSTR_MSTS); + + /* initialize the Master Descriptor Size (MDS) */ + val = readl(priv->smba + ISMT_MSTR_MDS); + writel((val & ~ISMT_MDS_MASK) | (ISMT_DESC_ENTRIES - 1), + priv->smba + ISMT_MSTR_MDS); + + /* + * Set the SMBus speed (could use this for slow HW debuggers) + */ + + val = readl(priv->smba + ISMT_SPGT); + + switch (bus_speed) { + case 0: + break; + + case 80: + dev_dbg(dev, "Setting SMBus clock to 80 kHz\n"); + writel(((val & ~ISMT_SPGT_SPD_MASK) | ISMT_SPGT_SPD_80K), + priv->smba + ISMT_SPGT); + break; + + case 100: + dev_dbg(dev, "Setting SMBus clock to 100 kHz\n"); + writel(((val & ~ISMT_SPGT_SPD_MASK) | ISMT_SPGT_SPD_100K), + priv->smba + ISMT_SPGT); + break; + + case 400: + dev_dbg(dev, "Setting SMBus clock to 400 kHz\n"); + writel(((val & ~ISMT_SPGT_SPD_MASK) | ISMT_SPGT_SPD_400K), + priv->smba + ISMT_SPGT); + break; + + case 1000: + dev_dbg(dev, "Setting SMBus clock to 1000 kHz\n"); + writel(((val & ~ISMT_SPGT_SPD_MASK) | ISMT_SPGT_SPD_1M), + priv->smba + ISMT_SPGT); + break; + + default: + dev_warn(dev, "Invalid SMBus clock speed, only 0, 80, 100, 400, and 1000 are valid\n"); + break; + } + + val = readl(priv->smba + ISMT_SPGT); + + switch (val & ISMT_SPGT_SPD_MASK) { + case ISMT_SPGT_SPD_80K: + bus_speed = 80; + break; + case ISMT_SPGT_SPD_100K: + bus_speed = 100; + break; + case ISMT_SPGT_SPD_400K: + bus_speed = 400; + break; + case ISMT_SPGT_SPD_1M: + bus_speed = 1000; + break; + } + dev_dbg(dev, "SMBus clock is running at %d kHz\n", bus_speed); +} + +/** + * ismt_dev_init() - initialize the iSMT data structures + * @priv: iSMT private data + */ +static int ismt_dev_init(struct ismt_priv *priv) +{ + /* allocate memory for the descriptor */ + priv->hw = dmam_alloc_coherent(&priv->pci_dev->dev, + (ISMT_DESC_ENTRIES + * sizeof(struct ismt_desc)), + &priv->io_rng_dma, + GFP_KERNEL); + if (!priv->hw) + return -ENOMEM; + + memset(priv->hw, 0, (ISMT_DESC_ENTRIES * sizeof(struct ismt_desc))); + + priv->head = 0; + init_completion(&priv->cmp); + + return 0; +} + +/** + * ismt_int_init() - initialize interrupts + * @priv: iSMT private data + */ +static int ismt_int_init(struct ismt_priv *priv) +{ + int err; + + /* Try using MSI interrupts */ + err = pci_enable_msi(priv->pci_dev); + if (err) { + dev_warn(&priv->pci_dev->dev, + "Unable to use MSI interrupts, falling back to legacy\n"); + goto intx; + } + + err = devm_request_irq(&priv->pci_dev->dev, + priv->pci_dev->irq, + ismt_do_msi_interrupt, + 0, + "ismt-msi", + priv); + if (err) { + pci_disable_msi(priv->pci_dev); + goto intx; + } + + priv->using_msi = true; + goto done; + + /* Try using legacy interrupts */ +intx: + err = devm_request_irq(&priv->pci_dev->dev, + priv->pci_dev->irq, + ismt_do_interrupt, + IRQF_SHARED, + "ismt-intx", + priv); + if (err) { + dev_err(&priv->pci_dev->dev, "no usable interrupts\n"); + return -ENODEV; + } + + priv->using_msi = false; + +done: + return 0; +} + +static struct pci_driver ismt_driver; + +/** + * ismt_probe() - probe for iSMT devices + * @pdev: PCI-Express device + * @id: PCI-Express device ID + */ +static int +ismt_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int err; + struct ismt_priv *priv; + unsigned long start, len; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + pci_set_drvdata(pdev, priv); + i2c_set_adapdata(&priv->adapter, priv); + priv->adapter.owner = THIS_MODULE; + + priv->adapter.class = I2C_CLASS_HWMON; + + priv->adapter.algo = &smbus_algorithm; + + /* set up the sysfs linkage to our parent device */ + priv->adapter.dev.parent = &pdev->dev; + + /* number of retries on lost arbitration */ + priv->adapter.retries = ISMT_MAX_RETRIES; + + priv->pci_dev = pdev; + + err = pcim_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "Failed to enable SMBus PCI device (%d)\n", + err); + return err; + } + + /* enable bus mastering */ + pci_set_master(pdev); + + /* Determine the address of the SMBus area */ + start = pci_resource_start(pdev, SMBBAR); + len = pci_resource_len(pdev, SMBBAR); + if (!start || !len) { + dev_err(&pdev->dev, + "SMBus base address uninitialized, upgrade BIOS\n"); + return -ENODEV; + } + + snprintf(priv->adapter.name, sizeof(priv->adapter.name), + "SMBus iSMT adapter at %lx", start); + + dev_dbg(&priv->pci_dev->dev, " start=0x%lX\n", start); + dev_dbg(&priv->pci_dev->dev, " len=0x%lX\n", len); + + err = acpi_check_resource_conflict(&pdev->resource[SMBBAR]); + if (err) { + dev_err(&pdev->dev, "ACPI resource conflict!\n"); + return err; + } + + err = pci_request_region(pdev, SMBBAR, ismt_driver.name); + if (err) { + dev_err(&pdev->dev, + "Failed to request SMBus region 0x%lx-0x%lx\n", + start, start + len); + return err; + } + + priv->smba = pcim_iomap(pdev, SMBBAR, len); + if (!priv->smba) { + dev_err(&pdev->dev, "Unable to ioremap SMBus BAR\n"); + err = -ENODEV; + goto fail; + } + + if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) || + (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) != 0)) { + if ((pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) || + (pci_set_consistent_dma_mask(pdev, + DMA_BIT_MASK(32)) != 0)) { + dev_err(&pdev->dev, "pci_set_dma_mask fail %p\n", + pdev); + goto fail; + } + } + + err = ismt_dev_init(priv); + if (err) + goto fail; + + ismt_hw_init(priv); + + err = ismt_int_init(priv); + if (err) + goto fail; + + err = i2c_add_adapter(&priv->adapter); + if (err) { + dev_err(&pdev->dev, "Failed to add SMBus iSMT adapter\n"); + err = -ENODEV; + goto fail; + } + return 0; + +fail: + pci_release_region(pdev, SMBBAR); + return err; +} + +/** + * ismt_remove() - release driver resources + * @pdev: PCI-Express device + */ +static void ismt_remove(struct pci_dev *pdev) +{ + struct ismt_priv *priv = pci_get_drvdata(pdev); + + i2c_del_adapter(&priv->adapter); + pci_release_region(pdev, SMBBAR); +} + +/** + * ismt_suspend() - place the device in suspend + * @pdev: PCI-Express device + * @mesg: PM message + */ +#ifdef CONFIG_PM +static int ismt_suspend(struct pci_dev *pdev, pm_message_t mesg) +{ + pci_save_state(pdev); + pci_set_power_state(pdev, pci_choose_state(pdev, mesg)); + return 0; +} + +/** + * ismt_resume() - PCI resume code + * @pdev: PCI-Express device + */ +static int ismt_resume(struct pci_dev *pdev) +{ + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + return pci_enable_device(pdev); +} + +#else + +#define ismt_suspend NULL +#define ismt_resume NULL + +#endif + +static struct pci_driver ismt_driver = { + .name = "ismt_smbus", + .id_table = ismt_ids, + .probe = ismt_probe, + .remove = ismt_remove, + .suspend = ismt_suspend, + .resume = ismt_resume, +}; + +module_pci_driver(ismt_driver); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_AUTHOR("Bill E. Brown <bill.e.brown@intel.com>"); +MODULE_DESCRIPTION("Intel SMBus Message Transport (iSMT) driver"); diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c index ca86430cb4a2..5e705ee02f4a 100644 --- a/drivers/i2c/busses/i2c-mpc.c +++ b/drivers/i2c/busses/i2c-mpc.c @@ -175,7 +175,7 @@ static int i2c_wait(struct mpc_i2c *i2c, unsigned timeout, int writing) } #if defined(CONFIG_PPC_MPC52xx) || defined(CONFIG_PPC_MPC512x) -static const struct mpc_i2c_divider mpc_i2c_dividers_52xx[] __devinitconst = { +static const struct mpc_i2c_divider mpc_i2c_dividers_52xx[] = { {20, 0x20}, {22, 0x21}, {24, 0x22}, {26, 0x23}, {28, 0x24}, {30, 0x01}, {32, 0x25}, {34, 0x02}, {36, 0x26}, {40, 0x27}, {44, 0x04}, {48, 0x28}, @@ -196,7 +196,7 @@ static const struct mpc_i2c_divider mpc_i2c_dividers_52xx[] __devinitconst = { {10240, 0x9d}, {12288, 0x9e}, {15360, 0x9f} }; -static int __devinit mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock, +static int mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock, int prescaler, u32 *real_clk) { const struct mpc_i2c_divider *div = NULL; @@ -230,7 +230,7 @@ static int __devinit mpc_i2c_get_fdr_52xx(struct device_node *node, u32 clock, return (int)div->fdr; } -static void __devinit mpc_i2c_setup_52xx(struct device_node *node, +static void mpc_i2c_setup_52xx(struct device_node *node, struct mpc_i2c *i2c, u32 clock, u32 prescaler) { @@ -252,7 +252,7 @@ static void __devinit mpc_i2c_setup_52xx(struct device_node *node, fdr); } #else /* !(CONFIG_PPC_MPC52xx || CONFIG_PPC_MPC512x) */ -static void __devinit mpc_i2c_setup_52xx(struct device_node *node, +static void mpc_i2c_setup_52xx(struct device_node *node, struct mpc_i2c *i2c, u32 clock, u32 prescaler) { @@ -260,7 +260,7 @@ static void __devinit mpc_i2c_setup_52xx(struct device_node *node, #endif /* CONFIG_PPC_MPC52xx || CONFIG_PPC_MPC512x */ #ifdef CONFIG_PPC_MPC512x -static void __devinit mpc_i2c_setup_512x(struct device_node *node, +static void mpc_i2c_setup_512x(struct device_node *node, struct mpc_i2c *i2c, u32 clock, u32 prescaler) { @@ -288,7 +288,7 @@ static void __devinit mpc_i2c_setup_512x(struct device_node *node, mpc_i2c_setup_52xx(node, i2c, clock, prescaler); } #else /* CONFIG_PPC_MPC512x */ -static void __devinit mpc_i2c_setup_512x(struct device_node *node, +static void mpc_i2c_setup_512x(struct device_node *node, struct mpc_i2c *i2c, u32 clock, u32 prescaler) { @@ -296,7 +296,7 @@ static void __devinit mpc_i2c_setup_512x(struct device_node *node, #endif /* CONFIG_PPC_MPC512x */ #ifdef CONFIG_FSL_SOC -static const struct mpc_i2c_divider mpc_i2c_dividers_8xxx[] __devinitconst = { +static const struct mpc_i2c_divider mpc_i2c_dividers_8xxx[] = { {160, 0x0120}, {192, 0x0121}, {224, 0x0122}, {256, 0x0123}, {288, 0x0100}, {320, 0x0101}, {352, 0x0601}, {384, 0x0102}, {416, 0x0602}, {448, 0x0126}, {480, 0x0103}, {512, 0x0127}, @@ -316,7 +316,7 @@ static const struct mpc_i2c_divider mpc_i2c_dividers_8xxx[] __devinitconst = { {49152, 0x011e}, {61440, 0x011f} }; -static u32 __devinit mpc_i2c_get_sec_cfg_8xxx(void) +static u32 mpc_i2c_get_sec_cfg_8xxx(void) { struct device_node *node = NULL; u32 __iomem *reg; @@ -345,7 +345,7 @@ static u32 __devinit mpc_i2c_get_sec_cfg_8xxx(void) return val; } -static int __devinit mpc_i2c_get_fdr_8xxx(struct device_node *node, u32 clock, +static int mpc_i2c_get_fdr_8xxx(struct device_node *node, u32 clock, u32 prescaler, u32 *real_clk) { const struct mpc_i2c_divider *div = NULL; @@ -383,7 +383,7 @@ static int __devinit mpc_i2c_get_fdr_8xxx(struct device_node *node, u32 clock, return div ? (int)div->fdr : -EINVAL; } -static void __devinit mpc_i2c_setup_8xxx(struct device_node *node, +static void mpc_i2c_setup_8xxx(struct device_node *node, struct mpc_i2c *i2c, u32 clock, u32 prescaler) { @@ -408,7 +408,7 @@ static void __devinit mpc_i2c_setup_8xxx(struct device_node *node, } #else /* !CONFIG_FSL_SOC */ -static void __devinit mpc_i2c_setup_8xxx(struct device_node *node, +static void mpc_i2c_setup_8xxx(struct device_node *node, struct mpc_i2c *i2c, u32 clock, u32 prescaler) { @@ -615,7 +615,7 @@ static struct i2c_adapter mpc_ops = { }; static const struct of_device_id mpc_i2c_of_match[]; -static int __devinit fsl_i2c_probe(struct platform_device *op) +static int fsl_i2c_probe(struct platform_device *op) { const struct of_device_id *match; struct mpc_i2c *i2c; @@ -696,7 +696,6 @@ static int __devinit fsl_i2c_probe(struct platform_device *op) return result; fail_add: - dev_set_drvdata(&op->dev, NULL); free_irq(i2c->irq, i2c); fail_request: irq_dispose_mapping(i2c->irq); @@ -706,12 +705,11 @@ static int __devinit fsl_i2c_probe(struct platform_device *op) return result; }; -static int __devexit fsl_i2c_remove(struct platform_device *op) +static int fsl_i2c_remove(struct platform_device *op) { struct mpc_i2c *i2c = dev_get_drvdata(&op->dev); i2c_del_adapter(&i2c->adap); - dev_set_drvdata(&op->dev, NULL); if (i2c->irq) free_irq(i2c->irq, i2c); @@ -746,24 +744,24 @@ static int mpc_i2c_resume(struct device *dev) SIMPLE_DEV_PM_OPS(mpc_i2c_pm_ops, mpc_i2c_suspend, mpc_i2c_resume); #endif -static const struct mpc_i2c_data mpc_i2c_data_512x __devinitdata = { +static const struct mpc_i2c_data mpc_i2c_data_512x = { .setup = mpc_i2c_setup_512x, }; -static const struct mpc_i2c_data mpc_i2c_data_52xx __devinitdata = { +static const struct mpc_i2c_data mpc_i2c_data_52xx = { .setup = mpc_i2c_setup_52xx, }; -static const struct mpc_i2c_data mpc_i2c_data_8313 __devinitdata = { +static const struct mpc_i2c_data mpc_i2c_data_8313 = { .setup = mpc_i2c_setup_8xxx, }; -static const struct mpc_i2c_data mpc_i2c_data_8543 __devinitdata = { +static const struct mpc_i2c_data mpc_i2c_data_8543 = { .setup = mpc_i2c_setup_8xxx, .prescaler = 2, }; -static const struct mpc_i2c_data mpc_i2c_data_8544 __devinitdata = { +static const struct mpc_i2c_data mpc_i2c_data_8544 = { .setup = mpc_i2c_setup_8xxx, .prescaler = 3, }; @@ -785,7 +783,7 @@ MODULE_DEVICE_TABLE(of, mpc_i2c_of_match); /* Structure for a device driver */ static struct platform_driver mpc_i2c_driver = { .probe = fsl_i2c_probe, - .remove = __devexit_p(fsl_i2c_remove), + .remove = fsl_i2c_remove, .driver = { .owner = THIS_MODULE, .name = DRV_NAME, diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index 2e9d56719e99..8b20ef8524ac 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -495,7 +495,7 @@ static const struct i2c_algorithm mv64xxx_i2c_algo = { * ***************************************************************************** */ -static int __devinit +static int mv64xxx_i2c_map_regs(struct platform_device *pd, struct mv64xxx_i2c_data *drv_data) { @@ -530,13 +530,13 @@ mv64xxx_i2c_unmap_regs(struct mv64xxx_i2c_data *drv_data) } #ifdef CONFIG_OF -static int __devinit +static int mv64xxx_calc_freq(const int tclk, const int n, const int m) { return tclk / (10 * (m + 1) * (2 << n)); } -static bool __devinit +static bool mv64xxx_find_baud_factors(const u32 req_freq, const u32 tclk, u32 *best_n, u32 *best_m) { @@ -560,7 +560,7 @@ mv64xxx_find_baud_factors(const u32 req_freq, const u32 tclk, u32 *best_n, return true; } -static int __devinit +static int mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data, struct device_node *np) { @@ -597,7 +597,7 @@ out: #endif } #else /* CONFIG_OF */ -static int __devinit +static int mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data, struct device_node *np) { @@ -605,7 +605,7 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data, } #endif /* CONFIG_OF */ -static int __devinit +static int mv64xxx_i2c_probe(struct platform_device *pd) { struct mv64xxx_i2c_data *drv_data; @@ -697,7 +697,7 @@ mv64xxx_i2c_probe(struct platform_device *pd) return rc; } -static int __devexit +static int mv64xxx_i2c_remove(struct platform_device *dev) { struct mv64xxx_i2c_data *drv_data = platform_get_drvdata(dev); @@ -718,7 +718,7 @@ mv64xxx_i2c_remove(struct platform_device *dev) return rc; } -static const struct of_device_id mv64xxx_i2c_of_match_table[] __devinitdata = { +static const struct of_device_id mv64xxx_i2c_of_match_table[] = { { .compatible = "marvell,mv64xxx-i2c", }, {} }; @@ -726,7 +726,7 @@ MODULE_DEVICE_TABLE(of, mv64xxx_i2c_of_match_table); static struct platform_driver mv64xxx_i2c_driver = { .probe = mv64xxx_i2c_probe, - .remove = __devexit_p(mv64xxx_i2c_remove), + .remove = mv64xxx_i2c_remove, .driver = { .owner = THIS_MODULE, .name = MV64XXX_I2C_CTLR_NAME, diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c index 286ca1917820..120f24646696 100644 --- a/drivers/i2c/busses/i2c-mxs.c +++ b/drivers/i2c/busses/i2c-mxs.c @@ -39,6 +39,7 @@ #define MXS_I2C_CTRL0_SET (0x04) #define MXS_I2C_CTRL0_SFTRST 0x80000000 +#define MXS_I2C_CTRL0_RUN 0x20000000 #define MXS_I2C_CTRL0_SEND_NAK_ON_LAST 0x02000000 #define MXS_I2C_CTRL0_RETAIN_CLOCK 0x00200000 #define MXS_I2C_CTRL0_POST_SEND_STOP 0x00100000 @@ -64,6 +65,13 @@ #define MXS_I2C_CTRL1_SLAVE_STOP_IRQ 0x02 #define MXS_I2C_CTRL1_SLAVE_IRQ 0x01 +#define MXS_I2C_DATA (0xa0) + +#define MXS_I2C_DEBUG0 (0xb0) +#define MXS_I2C_DEBUG0_CLR (0xb8) + +#define MXS_I2C_DEBUG0_DMAREQ 0x80000000 + #define MXS_I2C_IRQ_MASK (MXS_I2C_CTRL1_DATA_ENGINE_CMPLT_IRQ | \ MXS_I2C_CTRL1_NO_SLAVE_ACK_IRQ | \ MXS_I2C_CTRL1_EARLY_TERM_IRQ | \ @@ -85,35 +93,6 @@ #define MXS_CMD_I2C_READ (MXS_I2C_CTRL0_SEND_NAK_ON_LAST | \ MXS_I2C_CTRL0_MASTER_MODE) -struct mxs_i2c_speed_config { - uint32_t timing0; - uint32_t timing1; - uint32_t timing2; -}; - -/* - * Timing values for the default 24MHz clock supplied into the i2c block. - * - * The bus can operate at 95kHz or at 400kHz with the following timing - * register configurations. The 100kHz mode isn't present because it's - * values are not stated in the i.MX233/i.MX28 datasheet. The 95kHz mode - * shall be close enough replacement. Therefore when the bus is configured - * for 100kHz operation, 95kHz timing settings are actually loaded. - * - * For details, see i.MX233 [25.4.2 - 25.4.4] and i.MX28 [27.5.2 - 27.5.4]. - */ -static const struct mxs_i2c_speed_config mxs_i2c_95kHz_config = { - .timing0 = 0x00780030, - .timing1 = 0x00800030, - .timing2 = 0x00300030, -}; - -static const struct mxs_i2c_speed_config mxs_i2c_400kHz_config = { - .timing0 = 0x000f0007, - .timing1 = 0x001f000f, - .timing2 = 0x00300030, -}; - /** * struct mxs_i2c_dev - per device, private MXS-I2C data * @@ -127,9 +106,11 @@ struct mxs_i2c_dev { struct device *dev; void __iomem *regs; struct completion cmd_complete; - u32 cmd_err; + int cmd_err; struct i2c_adapter adapter; - const struct mxs_i2c_speed_config *speed; + + uint32_t timing0; + uint32_t timing1; /* DMA support components */ int dma_channel; @@ -145,9 +126,16 @@ static void mxs_i2c_reset(struct mxs_i2c_dev *i2c) { stmp_reset_block(i2c->regs); - writel(i2c->speed->timing0, i2c->regs + MXS_I2C_TIMING0); - writel(i2c->speed->timing1, i2c->regs + MXS_I2C_TIMING1); - writel(i2c->speed->timing2, i2c->regs + MXS_I2C_TIMING2); + /* + * Configure timing for the I2C block. The I2C TIMING2 register has to + * be programmed with this particular magic number. The rest is derived + * from the XTAL speed and requested I2C speed. + * + * For details, see i.MX233 [25.4.2 - 25.4.4] and i.MX28 [27.5.2 - 27.5.4]. + */ + writel(i2c->timing0, i2c->regs + MXS_I2C_TIMING0); + writel(i2c->timing1, i2c->regs + MXS_I2C_TIMING1); + writel(0x00300030, i2c->regs + MXS_I2C_TIMING2); writel(MXS_I2C_IRQ_MASK << 8, i2c->regs + MXS_I2C_CTRL1_SET); } @@ -287,15 +275,146 @@ read_init_dma_fail: select_init_dma_fail: dma_unmap_sg(i2c->dev, &i2c->sg_io[0], 1, DMA_TO_DEVICE); select_init_pio_fail: + dmaengine_terminate_all(i2c->dmach); return -EINVAL; /* Write failpath. */ write_init_dma_fail: dma_unmap_sg(i2c->dev, i2c->sg_io, 2, DMA_TO_DEVICE); write_init_pio_fail: + dmaengine_terminate_all(i2c->dmach); return -EINVAL; } +static int mxs_i2c_pio_wait_dmareq(struct mxs_i2c_dev *i2c) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(1000); + + while (!(readl(i2c->regs + MXS_I2C_DEBUG0) & + MXS_I2C_DEBUG0_DMAREQ)) { + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + cond_resched(); + } + + writel(MXS_I2C_DEBUG0_DMAREQ, i2c->regs + MXS_I2C_DEBUG0_CLR); + + return 0; +} + +static int mxs_i2c_pio_wait_cplt(struct mxs_i2c_dev *i2c) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(1000); + + /* + * We do not use interrupts in the PIO mode. Due to the + * maximum transfer length being 8 bytes in PIO mode, the + * overhead of interrupt would be too large and this would + * neglect the gain from using the PIO mode. + */ + + while (!(readl(i2c->regs + MXS_I2C_CTRL1) & + MXS_I2C_CTRL1_DATA_ENGINE_CMPLT_IRQ)) { + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + cond_resched(); + } + + writel(MXS_I2C_CTRL1_DATA_ENGINE_CMPLT_IRQ, + i2c->regs + MXS_I2C_CTRL1_CLR); + + return 0; +} + +static int mxs_i2c_pio_setup_xfer(struct i2c_adapter *adap, + struct i2c_msg *msg, uint32_t flags) +{ + struct mxs_i2c_dev *i2c = i2c_get_adapdata(adap); + uint32_t addr_data = msg->addr << 1; + uint32_t data = 0; + int i, shifts_left, ret; + + /* Mute IRQs coming from this block. */ + writel(MXS_I2C_IRQ_MASK << 8, i2c->regs + MXS_I2C_CTRL1_CLR); + + if (msg->flags & I2C_M_RD) { + addr_data |= I2C_SMBUS_READ; + + /* SELECT command. */ + writel(MXS_I2C_CTRL0_RUN | MXS_CMD_I2C_SELECT, + i2c->regs + MXS_I2C_CTRL0); + + ret = mxs_i2c_pio_wait_dmareq(i2c); + if (ret) + return ret; + + writel(addr_data, i2c->regs + MXS_I2C_DATA); + + ret = mxs_i2c_pio_wait_cplt(i2c); + if (ret) + return ret; + + /* READ command. */ + writel(MXS_I2C_CTRL0_RUN | MXS_CMD_I2C_READ | flags | + MXS_I2C_CTRL0_XFER_COUNT(msg->len), + i2c->regs + MXS_I2C_CTRL0); + + for (i = 0; i < msg->len; i++) { + if ((i & 3) == 0) { + ret = mxs_i2c_pio_wait_dmareq(i2c); + if (ret) + return ret; + data = readl(i2c->regs + MXS_I2C_DATA); + } + msg->buf[i] = data & 0xff; + data >>= 8; + } + } else { + addr_data |= I2C_SMBUS_WRITE; + + /* WRITE command. */ + writel(MXS_I2C_CTRL0_RUN | MXS_CMD_I2C_WRITE | flags | + MXS_I2C_CTRL0_XFER_COUNT(msg->len + 1), + i2c->regs + MXS_I2C_CTRL0); + + /* + * The LSB of data buffer is the first byte blasted across + * the bus. Higher order bytes follow. Thus the following + * filling schematic. + */ + data = addr_data << 24; + for (i = 0; i < msg->len; i++) { + data >>= 8; + data |= (msg->buf[i] << 24); + if ((i & 3) == 2) { + ret = mxs_i2c_pio_wait_dmareq(i2c); + if (ret) + return ret; + writel(data, i2c->regs + MXS_I2C_DATA); + } + } + + shifts_left = 24 - (i & 3) * 8; + if (shifts_left) { + data >>= shifts_left; + ret = mxs_i2c_pio_wait_dmareq(i2c); + if (ret) + return ret; + writel(data, i2c->regs + MXS_I2C_DATA); + } + } + + ret = mxs_i2c_pio_wait_cplt(i2c); + if (ret) + return ret; + + /* Clear any dangling IRQs and re-enable interrupts. */ + writel(MXS_I2C_IRQ_MASK, i2c->regs + MXS_I2C_CTRL1_CLR); + writel(MXS_I2C_IRQ_MASK << 8, i2c->regs + MXS_I2C_CTRL1_SET); + + return 0; +} + /* * Low level master read/write transaction. */ @@ -314,24 +433,37 @@ static int mxs_i2c_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, if (msg->len == 0) return -EINVAL; - init_completion(&i2c->cmd_complete); - i2c->cmd_err = 0; - - ret = mxs_i2c_dma_setup_xfer(adap, msg, flags); - if (ret) - return ret; + /* + * The current boundary to select between PIO/DMA transfer method + * is set to 8 bytes, transfers shorter than 8 bytes are transfered + * using PIO mode while longer transfers use DMA. The 8 byte border is + * based on this empirical measurement and a lot of previous frobbing. + */ + if (msg->len < 8) { + ret = mxs_i2c_pio_setup_xfer(adap, msg, flags); + if (ret) + mxs_i2c_reset(i2c); + } else { + i2c->cmd_err = 0; + INIT_COMPLETION(i2c->cmd_complete); + ret = mxs_i2c_dma_setup_xfer(adap, msg, flags); + if (ret) + return ret; - ret = wait_for_completion_timeout(&i2c->cmd_complete, + ret = wait_for_completion_timeout(&i2c->cmd_complete, msecs_to_jiffies(1000)); - if (ret == 0) - goto timeout; + if (ret == 0) + goto timeout; - if (i2c->cmd_err == -ENXIO) - mxs_i2c_reset(i2c); + if (i2c->cmd_err == -ENXIO) + mxs_i2c_reset(i2c); - dev_dbg(i2c->dev, "Done with err=%d\n", i2c->cmd_err); + ret = i2c->cmd_err; + } + + dev_dbg(i2c->dev, "Done with err=%d\n", ret); - return i2c->cmd_err; + return ret; timeout: dev_dbg(i2c->dev, "Timeout!\n"); @@ -357,7 +489,7 @@ static int mxs_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], static u32 mxs_i2c_func(struct i2c_adapter *adap) { - return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK); + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; } static irqreturn_t mxs_i2c_isr(int this_irq, void *dev_id) @@ -401,6 +533,43 @@ static bool mxs_i2c_dma_filter(struct dma_chan *chan, void *param) return true; } +static void mxs_i2c_derive_timing(struct mxs_i2c_dev *i2c, int speed) +{ + /* The I2C block clock run at 24MHz */ + const uint32_t clk = 24000000; + uint32_t base; + uint16_t high_count, low_count, rcv_count, xmit_count; + struct device *dev = i2c->dev; + + if (speed > 540000) { + dev_warn(dev, "Speed too high (%d Hz), using 540 kHz\n", speed); + speed = 540000; + } else if (speed < 12000) { + dev_warn(dev, "Speed too low (%d Hz), using 12 kHz\n", speed); + speed = 12000; + } + + /* + * The timing derivation algorithm. There is no documentation for this + * algorithm available, it was derived by using the scope and fiddling + * with constants until the result observed on the scope was good enough + * for 20kHz, 50kHz, 100kHz, 200kHz, 300kHz and 400kHz. It should be + * possible to assume the algorithm works for other frequencies as well. + * + * Note it was necessary to cap the frequency on both ends as it's not + * possible to configure completely arbitrary frequency for the I2C bus + * clock. + */ + base = ((clk / speed) - 38) / 2; + high_count = base + 3; + low_count = base - 3; + rcv_count = (high_count * 3) / 4; + xmit_count = low_count / 4; + + i2c->timing0 = (high_count << 16) | rcv_count; + i2c->timing1 = (low_count << 16) | xmit_count; +} + static int mxs_i2c_get_ofdata(struct mxs_i2c_dev *i2c) { uint32_t speed; @@ -420,17 +589,17 @@ static int mxs_i2c_get_ofdata(struct mxs_i2c_dev *i2c) } ret = of_property_read_u32(node, "clock-frequency", &speed); - if (ret) + if (ret) { dev_warn(dev, "No I2C speed selected, using 100kHz\n"); - else if (speed == 400000) - i2c->speed = &mxs_i2c_400kHz_config; - else if (speed != 100000) - dev_warn(dev, "Unsupported I2C speed selected, using 100kHz\n"); + speed = 100000; + } + + mxs_i2c_derive_timing(i2c, speed); return 0; } -static int __devinit mxs_i2c_probe(struct platform_device *pdev) +static int mxs_i2c_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct mxs_i2c_dev *i2c; @@ -469,7 +638,8 @@ static int __devinit mxs_i2c_probe(struct platform_device *pdev) return err; i2c->dev = dev; - i2c->speed = &mxs_i2c_95kHz_config; + + init_completion(&i2c->cmd_complete); if (dev->of_node) { err = mxs_i2c_get_ofdata(i2c); @@ -513,7 +683,7 @@ static int __devinit mxs_i2c_probe(struct platform_device *pdev) return 0; } -static int __devexit mxs_i2c_remove(struct platform_device *pdev) +static int mxs_i2c_remove(struct platform_device *pdev) { struct mxs_i2c_dev *i2c = platform_get_drvdata(pdev); int ret; @@ -527,8 +697,6 @@ static int __devexit mxs_i2c_remove(struct platform_device *pdev) writel(MXS_I2C_CTRL0_SFTRST, i2c->regs + MXS_I2C_CTRL0_SET); - platform_set_drvdata(pdev, NULL); - return 0; } @@ -544,7 +712,7 @@ static struct platform_driver mxs_i2c_driver = { .owner = THIS_MODULE, .of_match_table = mxs_i2c_dt_ids, }, - .remove = __devexit_p(mxs_i2c_remove), + .remove = mxs_i2c_remove, }; static int __init mxs_i2c_init(void) diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c index 392303b4be07..ac88f4000cc2 100644 --- a/drivers/i2c/busses/i2c-nforce2.c +++ b/drivers/i2c/busses/i2c-nforce2.c @@ -60,7 +60,7 @@ #include <linux/io.h> MODULE_LICENSE("GPL"); -MODULE_AUTHOR ("Hans-Frieder Vogt <hfvogt@gmx.net>"); +MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>"); MODULE_DESCRIPTION("nForce2/3/4/5xx SMBus driver"); @@ -117,7 +117,7 @@ struct nforce2_smbus { #define MAX_TIMEOUT 100 /* We disable the second SMBus channel on these boards */ -static struct dmi_system_id __devinitdata nforce2_dmi_blacklist2[] = { +static const struct dmi_system_id nforce2_dmi_blacklist2[] = { { .ident = "DFI Lanparty NF4 Expert", .matches = { @@ -188,9 +188,9 @@ static int nforce2_check_status(struct i2c_adapter *adap) } /* Return negative errno on error */ -static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, +static s32 nforce2_access(struct i2c_adapter *adap, u16 addr, unsigned short flags, char read_write, - u8 command, int size, union i2c_smbus_data * data) + u8 command, int size, union i2c_smbus_data *data) { struct nforce2_smbus *smbus = adap->algo_data; unsigned char protocol, pec; @@ -202,56 +202,54 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, pec = (flags & I2C_CLIENT_PEC) ? NVIDIA_SMB_PRTCL_PEC : 0; switch (size) { + case I2C_SMBUS_QUICK: + protocol |= NVIDIA_SMB_PRTCL_QUICK; + read_write = I2C_SMBUS_WRITE; + break; - case I2C_SMBUS_QUICK: - protocol |= NVIDIA_SMB_PRTCL_QUICK; - read_write = I2C_SMBUS_WRITE; - break; - - case I2C_SMBUS_BYTE: - if (read_write == I2C_SMBUS_WRITE) - outb_p(command, NVIDIA_SMB_CMD); - protocol |= NVIDIA_SMB_PRTCL_BYTE; - break; - - case I2C_SMBUS_BYTE_DATA: - outb_p(command, NVIDIA_SMB_CMD); - if (read_write == I2C_SMBUS_WRITE) - outb_p(data->byte, NVIDIA_SMB_DATA); - protocol |= NVIDIA_SMB_PRTCL_BYTE_DATA; - break; - - case I2C_SMBUS_WORD_DATA: + case I2C_SMBUS_BYTE: + if (read_write == I2C_SMBUS_WRITE) outb_p(command, NVIDIA_SMB_CMD); - if (read_write == I2C_SMBUS_WRITE) { - outb_p(data->word, NVIDIA_SMB_DATA); - outb_p(data->word >> 8, NVIDIA_SMB_DATA+1); - } - protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec; - break; - - case I2C_SMBUS_BLOCK_DATA: - outb_p(command, NVIDIA_SMB_CMD); - if (read_write == I2C_SMBUS_WRITE) { - len = data->block[0]; - if ((len == 0) || (len > I2C_SMBUS_BLOCK_MAX)) { - dev_err(&adap->dev, - "Transaction failed " - "(requested block size: %d)\n", - len); - return -EINVAL; - } - outb_p(len, NVIDIA_SMB_BCNT); - for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++) - outb_p(data->block[i + 1], - NVIDIA_SMB_DATA+i); + protocol |= NVIDIA_SMB_PRTCL_BYTE; + break; + + case I2C_SMBUS_BYTE_DATA: + outb_p(command, NVIDIA_SMB_CMD); + if (read_write == I2C_SMBUS_WRITE) + outb_p(data->byte, NVIDIA_SMB_DATA); + protocol |= NVIDIA_SMB_PRTCL_BYTE_DATA; + break; + + case I2C_SMBUS_WORD_DATA: + outb_p(command, NVIDIA_SMB_CMD); + if (read_write == I2C_SMBUS_WRITE) { + outb_p(data->word, NVIDIA_SMB_DATA); + outb_p(data->word >> 8, NVIDIA_SMB_DATA + 1); + } + protocol |= NVIDIA_SMB_PRTCL_WORD_DATA | pec; + break; + + case I2C_SMBUS_BLOCK_DATA: + outb_p(command, NVIDIA_SMB_CMD); + if (read_write == I2C_SMBUS_WRITE) { + len = data->block[0]; + if ((len == 0) || (len > I2C_SMBUS_BLOCK_MAX)) { + dev_err(&adap->dev, + "Transaction failed (requested block size: %d)\n", + len); + return -EINVAL; } - protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec; - break; + outb_p(len, NVIDIA_SMB_BCNT); + for (i = 0; i < I2C_SMBUS_BLOCK_MAX; i++) + outb_p(data->block[i + 1], + NVIDIA_SMB_DATA + i); + } + protocol |= NVIDIA_SMB_PRTCL_BLOCK_DATA | pec; + break; - default: - dev_err(&adap->dev, "Unsupported transaction %d\n", size); - return -EOPNOTSUPP; + default: + dev_err(&adap->dev, "Unsupported transaction %d\n", size); + return -EOPNOTSUPP; } outb_p((addr & 0x7f) << 1, NVIDIA_SMB_ADDR); @@ -265,28 +263,28 @@ static s32 nforce2_access(struct i2c_adapter * adap, u16 addr, return 0; switch (size) { - - case I2C_SMBUS_BYTE: - case I2C_SMBUS_BYTE_DATA: - data->byte = inb_p(NVIDIA_SMB_DATA); - break; - - case I2C_SMBUS_WORD_DATA: - data->word = inb_p(NVIDIA_SMB_DATA) | (inb_p(NVIDIA_SMB_DATA+1) << 8); - break; - - case I2C_SMBUS_BLOCK_DATA: - len = inb_p(NVIDIA_SMB_BCNT); - if ((len <= 0) || (len > I2C_SMBUS_BLOCK_MAX)) { - dev_err(&adap->dev, "Transaction failed " - "(received block size: 0x%02x)\n", - len); - return -EPROTO; - } - for (i = 0; i < len; i++) - data->block[i+1] = inb_p(NVIDIA_SMB_DATA + i); - data->block[0] = len; - break; + case I2C_SMBUS_BYTE: + case I2C_SMBUS_BYTE_DATA: + data->byte = inb_p(NVIDIA_SMB_DATA); + break; + + case I2C_SMBUS_WORD_DATA: + data->word = inb_p(NVIDIA_SMB_DATA) | + (inb_p(NVIDIA_SMB_DATA + 1) << 8); + break; + + case I2C_SMBUS_BLOCK_DATA: + len = inb_p(NVIDIA_SMB_BCNT); + if ((len <= 0) || (len > I2C_SMBUS_BLOCK_MAX)) { + dev_err(&adap->dev, + "Transaction failed (received block size: 0x%02x)\n", + len); + return -EPROTO; + } + for (i = 0; i < len; i++) + data->block[i + 1] = inb_p(NVIDIA_SMB_DATA + i); + data->block[0] = len; + break; } return 0; @@ -299,7 +297,7 @@ static u32 nforce2_func(struct i2c_adapter *adapter) return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_PEC | - (((struct nforce2_smbus*)adapter->algo_data)->blockops ? + (((struct nforce2_smbus *)adapter->algo_data)->blockops ? I2C_FUNC_SMBUS_BLOCK_DATA : 0); } @@ -327,11 +325,11 @@ static DEFINE_PCI_DEVICE_TABLE(nforce2_ids) = { { 0 } }; -MODULE_DEVICE_TABLE (pci, nforce2_ids); +MODULE_DEVICE_TABLE(pci, nforce2_ids); -static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar, - int alt_reg, struct nforce2_smbus *smbus, const char *name) +static int nforce2_probe_smb(struct pci_dev *dev, int bar, int alt_reg, + struct nforce2_smbus *smbus, const char *name) { int error; @@ -377,22 +375,24 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar, release_region(smbus->base, smbus->size); return error; } - dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n", smbus->base); + dev_info(&smbus->adapter.dev, "nForce2 SMBus adapter at %#x\n", + smbus->base); return 0; } -static int __devinit nforce2_probe(struct pci_dev *dev, const struct pci_device_id *id) +static int nforce2_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct nforce2_smbus *smbuses; int res1, res2; /* we support 2 SMBus adapters */ - if (!(smbuses = kzalloc(2*sizeof(struct nforce2_smbus), GFP_KERNEL))) + smbuses = kzalloc(2 * sizeof(struct nforce2_smbus), GFP_KERNEL); + if (!smbuses) return -ENOMEM; pci_set_drvdata(dev, smbuses); - switch(dev->device) { + switch (dev->device) { case PCI_DEVICE_ID_NVIDIA_NFORCE2_SMBUS: case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_SMBUS: case PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_SMBUS: @@ -430,7 +430,7 @@ static int __devinit nforce2_probe(struct pci_dev *dev, const struct pci_device_ } -static void __devexit nforce2_remove(struct pci_dev *dev) +static void nforce2_remove(struct pci_dev *dev) { struct nforce2_smbus *smbuses = pci_get_drvdata(dev); @@ -450,7 +450,7 @@ static struct pci_driver nforce2_driver = { .name = "nForce2_smbus", .id_table = nforce2_ids, .probe = nforce2_probe, - .remove = __devexit_p(nforce2_remove), + .remove = nforce2_remove, }; module_pci_driver(nforce2_driver); diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c index 02c3115a2dfa..650293ff4d62 100644 --- a/drivers/i2c/busses/i2c-nomadik.c +++ b/drivers/i2c/busses/i2c-nomadik.c @@ -26,6 +26,7 @@ #include <linux/platform_data/i2c-nomadik.h> #include <linux/of.h> #include <linux/of_i2c.h> +#include <linux/pinctrl/consumer.h> #define DRIVER_NAME "nmk-i2c" @@ -147,6 +148,10 @@ struct i2c_nmk_client { * @stop: stop condition. * @xfer_complete: acknowledge completion for a I2C message. * @result: controller propogated result. + * @pinctrl: pinctrl handle. + * @pins_default: default state for the pins. + * @pins_idle: idle state for the pins. + * @pins_sleep: sleep state for the pins. * @busy: Busy doing transfer. */ struct nmk_i2c_dev { @@ -160,6 +165,11 @@ struct nmk_i2c_dev { int stop; struct completion xfer_complete; int result; + /* Three pin states - default, idle & sleep */ + struct pinctrl *pinctrl; + struct pinctrl_state *pins_default; + struct pinctrl_state *pins_idle; + struct pinctrl_state *pins_sleep; bool busy; }; @@ -402,8 +412,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev) static int read_i2c(struct nmk_i2c_dev *dev, u16 flags) { u32 status = 0; - u32 mcr; - u32 irq_mask = 0; + u32 mcr, irq_mask; int timeout; mcr = load_i2c_mcr_reg(dev, flags); @@ -435,13 +444,6 @@ static int read_i2c(struct nmk_i2c_dev *dev, u16 flags) timeout = wait_for_completion_timeout( &dev->xfer_complete, dev->adap.timeout); - if (timeout < 0) { - dev_err(&dev->adev->dev, - "wait_for_completion_timeout " - "returned %d waiting for event\n", timeout); - status = timeout; - } - if (timeout == 0) { /* Controller timed out */ dev_err(&dev->adev->dev, "read from slave 0x%x timed out\n", @@ -479,8 +481,7 @@ static void fill_tx_fifo(struct nmk_i2c_dev *dev, int no_bytes) static int write_i2c(struct nmk_i2c_dev *dev, u16 flags) { u32 status = 0; - u32 mcr; - u32 irq_mask = 0; + u32 mcr, irq_mask; int timeout; mcr = load_i2c_mcr_reg(dev, flags); @@ -523,13 +524,6 @@ static int write_i2c(struct nmk_i2c_dev *dev, u16 flags) timeout = wait_for_completion_timeout( &dev->xfer_complete, dev->adap.timeout); - if (timeout < 0) { - dev_err(&dev->adev->dev, - "wait_for_completion_timeout " - "returned %d waiting for event\n", timeout); - status = timeout; - } - if (timeout == 0) { /* Controller timed out */ dev_err(&dev->adev->dev, "write to slave 0x%x timed out\n", @@ -650,6 +644,15 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, goto out_clk; } + /* Optionaly enable pins to be muxed in and configured */ + if (!IS_ERR(dev->pins_default)) { + status = pinctrl_select_state(dev->pinctrl, + dev->pins_default); + if (status) + dev_err(&dev->adev->dev, + "could not set default pins\n"); + } + status = init_hw(dev); if (status) goto out; @@ -677,6 +680,15 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap, out: clk_disable_unprepare(dev->clk); out_clk: + /* Optionally let pins go into idle state */ + if (!IS_ERR(dev->pins_idle)) { + status = pinctrl_select_state(dev->pinctrl, + dev->pins_idle); + if (status) + dev_err(&dev->adev->dev, + "could not set pins to idle state\n"); + } + pm_runtime_put_sync(&dev->adev->dev); dev->busy = false; @@ -717,8 +729,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg) struct nmk_i2c_dev *dev = arg; u32 tft, rft; u32 count; - u32 misr; - u32 src = 0; + u32 misr, src; /* load Tx FIFO and Rx FIFO threshold values */ tft = readl(dev->virtbase + I2C_TFTR); @@ -871,15 +882,41 @@ static int nmk_i2c_suspend(struct device *dev) { struct amba_device *adev = to_amba_device(dev); struct nmk_i2c_dev *nmk_i2c = amba_get_drvdata(adev); + int ret; if (nmk_i2c->busy) return -EBUSY; + if (!IS_ERR(nmk_i2c->pins_sleep)) { + ret = pinctrl_select_state(nmk_i2c->pinctrl, + nmk_i2c->pins_sleep); + if (ret) + dev_err(dev, "could not set pins to sleep state\n"); + } + return 0; } static int nmk_i2c_resume(struct device *dev) { + struct amba_device *adev = to_amba_device(dev); + struct nmk_i2c_dev *nmk_i2c = amba_get_drvdata(adev); + int ret; + + /* First go to the default state */ + if (!IS_ERR(nmk_i2c->pins_default)) { + ret = pinctrl_select_state(nmk_i2c->pinctrl, + nmk_i2c->pins_default); + if (ret) + dev_err(dev, "could not set pins to default state\n"); + } + /* Then let's idle the pins until the next transfer happens */ + if (!IS_ERR(nmk_i2c->pins_idle)) { + ret = pinctrl_select_state(nmk_i2c->pinctrl, + nmk_i2c->pins_idle); + if (ret) + dev_err(dev, "could not set pins to idle state\n"); + } return 0; } #else @@ -967,6 +1004,40 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) dev->adev = adev; amba_set_drvdata(adev, dev); + dev->pinctrl = devm_pinctrl_get(&adev->dev); + if (IS_ERR(dev->pinctrl)) { + ret = PTR_ERR(dev->pinctrl); + goto err_pinctrl; + } + + dev->pins_default = pinctrl_lookup_state(dev->pinctrl, + PINCTRL_STATE_DEFAULT); + if (IS_ERR(dev->pins_default)) { + dev_err(&adev->dev, "could not get default pinstate\n"); + } else { + ret = pinctrl_select_state(dev->pinctrl, + dev->pins_default); + if (ret) + dev_dbg(&adev->dev, "could not set default pinstate\n"); + } + + dev->pins_idle = pinctrl_lookup_state(dev->pinctrl, + PINCTRL_STATE_IDLE); + if (IS_ERR(dev->pins_idle)) { + dev_dbg(&adev->dev, "could not get idle pinstate\n"); + } else { + /* If possible, let's go to idle until the first transfer */ + ret = pinctrl_select_state(dev->pinctrl, + dev->pins_idle); + if (ret) + dev_dbg(&adev->dev, "could not set idle pinstate\n"); + } + + dev->pins_sleep = pinctrl_lookup_state(dev->pinctrl, + PINCTRL_STATE_SLEEP); + if (IS_ERR(dev->pins_sleep)) + dev_dbg(&adev->dev, "could not get sleep pinstate\n"); + dev->virtbase = ioremap(adev->res.start, resource_size(&adev->res)); if (!dev->virtbase) { ret = -ENOMEM; @@ -1034,8 +1105,8 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id) err_irq: iounmap(dev->virtbase); err_no_ioremap: - amba_set_drvdata(adev, NULL); kfree(dev); + err_pinctrl: err_no_mem: return ret; @@ -1058,7 +1129,6 @@ static int nmk_i2c_remove(struct amba_device *adev) release_mem_region(res->start, resource_size(res)); clk_put(dev->clk); pm_runtime_disable(&adev->dev); - amba_set_drvdata(adev, NULL); kfree(dev); return 0; diff --git a/drivers/i2c/busses/i2c-nuc900.c b/drivers/i2c/busses/i2c-nuc900.c index f41502ef3f55..865ee350adb3 100644 --- a/drivers/i2c/busses/i2c-nuc900.c +++ b/drivers/i2c/busses/i2c-nuc900.c @@ -304,7 +304,7 @@ retry_write: case STATE_READ: /* we have a byte of data in the data register, do - * something with it, and then work out wether we are + * something with it, and then work out whether we are * going to do any more read/write */ @@ -518,7 +518,7 @@ static const struct i2c_algorithm nuc900_i2c_algorithm = { * called by the bus driver when a suitable device is found */ -static int __devinit nuc900_i2c_probe(struct platform_device *pdev) +static int nuc900_i2c_probe(struct platform_device *pdev) { struct nuc900_i2c *i2c; struct nuc900_platform_i2c *pdata; @@ -663,7 +663,7 @@ static int __devinit nuc900_i2c_probe(struct platform_device *pdev) * called when device is removed from the bus */ -static int __devexit nuc900_i2c_remove(struct platform_device *pdev) +static int nuc900_i2c_remove(struct platform_device *pdev) { struct nuc900_i2c *i2c = platform_get_drvdata(pdev); @@ -684,7 +684,7 @@ static int __devexit nuc900_i2c_remove(struct platform_device *pdev) static struct platform_driver nuc900_i2c_driver = { .probe = nuc900_i2c_probe, - .remove = __devexit_p(nuc900_i2c_remove), + .remove = nuc900_i2c_remove, .driver = { .owner = THIS_MODULE, .name = "nuc900-i2c0", diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c index bffd5501ac2d..0e1f8245e768 100644 --- a/drivers/i2c/busses/i2c-ocores.c +++ b/drivers/i2c/busses/i2c-ocores.c @@ -4,15 +4,15 @@ * * Peter Korsgaard <jacmet@sunsite.dk> * + * Support for the GRLIB port of the controller by + * Andreas Larsson <andreas@gaisler.com> + * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any * kind, whether express or implied. */ -/* - * This driver can be used from the device tree, see - * Documentation/devicetree/bindings/i2c/ocore-i2c.txt - */ +#include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> @@ -38,6 +38,8 @@ struct ocores_i2c { int nmsgs; int state; /* see STATE_ */ int clock_khz; + void (*setreg)(struct ocores_i2c *i2c, int reg, u8 value); + u8 (*getreg)(struct ocores_i2c *i2c, int reg); }; /* registers */ @@ -71,24 +73,47 @@ struct ocores_i2c { #define STATE_READ 3 #define STATE_ERROR 4 +#define TYPE_OCORES 0 +#define TYPE_GRLIB 1 + +static void oc_setreg_8(struct ocores_i2c *i2c, int reg, u8 value) +{ + iowrite8(value, i2c->base + (reg << i2c->reg_shift)); +} + +static void oc_setreg_16(struct ocores_i2c *i2c, int reg, u8 value) +{ + iowrite16(value, i2c->base + (reg << i2c->reg_shift)); +} + +static void oc_setreg_32(struct ocores_i2c *i2c, int reg, u8 value) +{ + iowrite32(value, i2c->base + (reg << i2c->reg_shift)); +} + +static inline u8 oc_getreg_8(struct ocores_i2c *i2c, int reg) +{ + return ioread8(i2c->base + (reg << i2c->reg_shift)); +} + +static inline u8 oc_getreg_16(struct ocores_i2c *i2c, int reg) +{ + return ioread16(i2c->base + (reg << i2c->reg_shift)); +} + +static inline u8 oc_getreg_32(struct ocores_i2c *i2c, int reg) +{ + return ioread32(i2c->base + (reg << i2c->reg_shift)); +} + static inline void oc_setreg(struct ocores_i2c *i2c, int reg, u8 value) { - if (i2c->reg_io_width == 4) - iowrite32(value, i2c->base + (reg << i2c->reg_shift)); - else if (i2c->reg_io_width == 2) - iowrite16(value, i2c->base + (reg << i2c->reg_shift)); - else - iowrite8(value, i2c->base + (reg << i2c->reg_shift)); + i2c->setreg(i2c, reg, value); } static inline u8 oc_getreg(struct ocores_i2c *i2c, int reg) { - if (i2c->reg_io_width == 4) - return ioread32(i2c->base + (reg << i2c->reg_shift)); - else if (i2c->reg_io_width == 2) - return ioread16(i2c->base + (reg << i2c->reg_shift)); - else - return ioread8(i2c->base + (reg << i2c->reg_shift)); + return i2c->getreg(i2c, reg); } static void ocores_process(struct ocores_i2c *i2c) @@ -227,11 +252,59 @@ static struct i2c_adapter ocores_adapter = { .algo = &ocores_algorithm, }; +static struct of_device_id ocores_i2c_match[] = { + { + .compatible = "opencores,i2c-ocores", + .data = (void *)TYPE_OCORES, + }, + { + .compatible = "aeroflexgaisler,i2cmst", + .data = (void *)TYPE_GRLIB, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, ocores_i2c_match); + #ifdef CONFIG_OF +/* Read and write functions for the GRLIB port of the controller. Registers are + * 32-bit big endian and the PRELOW and PREHIGH registers are merged into one + * register. The subsequent registers has their offset decreased accordingly. */ +static u8 oc_getreg_grlib(struct ocores_i2c *i2c, int reg) +{ + u32 rd; + int rreg = reg; + if (reg != OCI2C_PRELOW) + rreg--; + rd = ioread32be(i2c->base + (rreg << i2c->reg_shift)); + if (reg == OCI2C_PREHIGH) + return (u8)(rd >> 8); + else + return (u8)rd; +} + +static void oc_setreg_grlib(struct ocores_i2c *i2c, int reg, u8 value) +{ + u32 curr, wr; + int rreg = reg; + if (reg != OCI2C_PRELOW) + rreg--; + if (reg == OCI2C_PRELOW || reg == OCI2C_PREHIGH) { + curr = ioread32be(i2c->base + (rreg << i2c->reg_shift)); + if (reg == OCI2C_PRELOW) + wr = (curr & 0xff00) | value; + else + wr = (((u32)value) << 8) | (curr & 0xff); + } else { + wr = value; + } + iowrite32be(wr, i2c->base + (rreg << i2c->reg_shift)); +} + static int ocores_i2c_of_probe(struct platform_device *pdev, struct ocores_i2c *i2c) { struct device_node *np = pdev->dev.of_node; + const struct of_device_id *match; u32 val; if (of_property_read_u32(np, "reg-shift", &i2c->reg_shift)) { @@ -257,17 +330,26 @@ static int ocores_i2c_of_probe(struct platform_device *pdev, of_property_read_u32(pdev->dev.of_node, "reg-io-width", &i2c->reg_io_width); + + match = of_match_node(ocores_i2c_match, pdev->dev.of_node); + if (match && (long)match->data == TYPE_GRLIB) { + dev_dbg(&pdev->dev, "GRLIB variant of i2c-ocores\n"); + i2c->setreg = oc_setreg_grlib; + i2c->getreg = oc_getreg_grlib; + } + return 0; } #else #define ocores_i2c_of_probe(pdev,i2c) -ENODEV #endif -static int __devinit ocores_i2c_probe(struct platform_device *pdev) +static int ocores_i2c_probe(struct platform_device *pdev) { struct ocores_i2c *i2c; struct ocores_i2c_platform_data *pdata; - struct resource *res, *res2; + struct resource *res; + int irq; int ret; int i; @@ -275,26 +357,17 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev) if (!res) return -ENODEV; - res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res2) - return -ENODEV; + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL); if (!i2c) return -ENOMEM; - if (!devm_request_mem_region(&pdev->dev, res->start, - resource_size(res), pdev->name)) { - dev_err(&pdev->dev, "Memory region busy\n"); - return -EBUSY; - } - - i2c->base = devm_ioremap_nocache(&pdev->dev, res->start, - resource_size(res)); - if (!i2c->base) { - dev_err(&pdev->dev, "Unable to map registers\n"); - return -EIO; - } + i2c->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(i2c->base)) + return PTR_ERR(i2c->base); pdata = pdev->dev.platform_data; if (pdata) { @@ -310,10 +383,34 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev) if (i2c->reg_io_width == 0) i2c->reg_io_width = 1; /* Set to default value */ + if (!i2c->setreg || !i2c->getreg) { + switch (i2c->reg_io_width) { + case 1: + i2c->setreg = oc_setreg_8; + i2c->getreg = oc_getreg_8; + break; + + case 2: + i2c->setreg = oc_setreg_16; + i2c->getreg = oc_getreg_16; + break; + + case 4: + i2c->setreg = oc_setreg_32; + i2c->getreg = oc_getreg_32; + break; + + default: + dev_err(&pdev->dev, "Unsupported I/O width (%d)\n", + i2c->reg_io_width); + return -EINVAL; + } + } + ocores_init(i2c); init_waitqueue_head(&i2c->wait); - ret = devm_request_irq(&pdev->dev, res2->start, ocores_isr, 0, + ret = devm_request_irq(&pdev->dev, irq, ocores_isr, 0, pdev->name, i2c); if (ret) { dev_err(&pdev->dev, "Cannot claim IRQ\n"); @@ -345,7 +442,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev) return 0; } -static int __devexit ocores_i2c_remove(struct platform_device *pdev) +static int ocores_i2c_remove(struct platform_device *pdev) { struct ocores_i2c *i2c = platform_get_drvdata(pdev); @@ -355,7 +452,6 @@ static int __devexit ocores_i2c_remove(struct platform_device *pdev) /* remove adapter & data */ i2c_del_adapter(&i2c->adap); - platform_set_drvdata(pdev, NULL); return 0; } @@ -387,15 +483,9 @@ static SIMPLE_DEV_PM_OPS(ocores_i2c_pm, ocores_i2c_suspend, ocores_i2c_resume); #define OCORES_I2C_PM NULL #endif -static struct of_device_id ocores_i2c_match[] = { - { .compatible = "opencores,i2c-ocores", }, - {}, -}; -MODULE_DEVICE_TABLE(of, ocores_i2c_match); - static struct platform_driver ocores_i2c_driver = { .probe = ocores_i2c_probe, - .remove = __devexit_p(ocores_i2c_remove), + .remove = ocores_i2c_remove, .driver = { .owner = THIS_MODULE, .name = "ocores-i2c", diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c index f44c83549fe5..935585ef4d39 100644 --- a/drivers/i2c/busses/i2c-octeon.c +++ b/drivers/i2c/busses/i2c-octeon.c @@ -446,7 +446,7 @@ static struct i2c_adapter octeon_i2c_ops = { /** * octeon_i2c_setclock - Calculate and set clock divisors. */ -static int __devinit octeon_i2c_setclock(struct octeon_i2c *i2c) +static int octeon_i2c_setclock(struct octeon_i2c *i2c) { int tclk, thp_base, inc, thp_idx, mdiv_idx, ndiv_idx, foscl, diff; int thp = 0x18, mdiv = 2, ndiv = 0, delta_hz = 1000000; @@ -489,7 +489,7 @@ static int __devinit octeon_i2c_setclock(struct octeon_i2c *i2c) return 0; } -static int __devinit octeon_i2c_initlowlevel(struct octeon_i2c *i2c) +static int octeon_i2c_initlowlevel(struct octeon_i2c *i2c) { u8 status; int tries; @@ -510,7 +510,7 @@ static int __devinit octeon_i2c_initlowlevel(struct octeon_i2c *i2c) return -EIO; } -static int __devinit octeon_i2c_probe(struct platform_device *pdev) +static int octeon_i2c_probe(struct platform_device *pdev) { int irq, result = 0; struct octeon_i2c *i2c; @@ -595,7 +595,7 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev) result = i2c_add_adapter(&i2c->adap); if (result < 0) { dev_err(i2c->dev, "failed to add adapter\n"); - goto fail_add; + goto out; } dev_info(i2c->dev, "version %s\n", DRV_VERSION); @@ -603,18 +603,15 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev) return 0; -fail_add: - platform_set_drvdata(pdev, NULL); out: return result; }; -static int __devexit octeon_i2c_remove(struct platform_device *pdev) +static int octeon_i2c_remove(struct platform_device *pdev) { struct octeon_i2c *i2c = platform_get_drvdata(pdev); i2c_del_adapter(&i2c->adap); - platform_set_drvdata(pdev, NULL); return 0; }; @@ -628,7 +625,7 @@ MODULE_DEVICE_TABLE(of, octeon_i2c_match); static struct platform_driver octeon_i2c_driver = { .probe = octeon_i2c_probe, - .remove = __devexit_p(octeon_i2c_remove), + .remove = octeon_i2c_remove, .driver = { .owner = THIS_MODULE, .name = DRV_NAME, diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index db31eaed6ea5..e02f9e36a7b2 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -43,15 +43,16 @@ #include <linux/slab.h> #include <linux/i2c-omap.h> #include <linux/pm_runtime.h> -#include <linux/pm_qos.h> +#include <linux/pinctrl/consumer.h> /* I2C controller revisions */ #define OMAP_I2C_OMAP1_REV_2 0x20 /* I2C controller revisions present on specific hardware */ -#define OMAP_I2C_REV_ON_2430 0x36 -#define OMAP_I2C_REV_ON_3430_3530 0x3C -#define OMAP_I2C_REV_ON_3630_4430 0x40 +#define OMAP_I2C_REV_ON_2430 0x00000036 +#define OMAP_I2C_REV_ON_3430_3530 0x0000003C +#define OMAP_I2C_REV_ON_3630 0x00000040 +#define OMAP_I2C_REV_ON_4430_PLUS 0x50400002 /* timeout waiting for the controller to respond */ #define OMAP_I2C_TIMEOUT (msecs_to_jiffies(1000)) @@ -187,10 +188,10 @@ struct omap_i2c_dev { int reg_shift; /* bit shift for I2C register addresses */ struct completion cmd_complete; struct resource *ioarea; - u32 latency; /* maximum MPU wkup latency */ - struct pm_qos_request pm_qos_request; + u32 latency; /* maximum mpu wkup latency */ + void (*set_mpu_wkup_lat)(struct device *dev, + long latency); u32 speed; /* Speed of bus in kHz */ - u32 dtrev; /* extra revision from DT */ u32 flags; u16 cmd_err; u8 *buf; @@ -202,17 +203,18 @@ struct omap_i2c_dev { * fifo_size==0 implies no fifo * if set, should be trsh+1 */ - u8 rev; + u32 rev; unsigned b_hw:1; /* bad h/w fixes */ unsigned receiver:1; /* true when we're in receiver mode */ u16 iestate; /* Saved interrupt register */ u16 pscstate; u16 scllstate; u16 sclhstate; - u16 bufstate; u16 syscstate; u16 westate; u16 errata; + + struct pinctrl *pins; }; static const u8 reg_map_ip_v1[] = { @@ -275,16 +277,39 @@ static inline u16 omap_i2c_read_reg(struct omap_i2c_dev *i2c_dev, int reg) (i2c_dev->regs[reg] << i2c_dev->reg_shift)); } -static int omap_i2c_init(struct omap_i2c_dev *dev) +static void __omap_i2c_init(struct omap_i2c_dev *dev) +{ + + omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0); + + /* Setup clock prescaler to obtain approx 12MHz I2C module clock: */ + omap_i2c_write_reg(dev, OMAP_I2C_PSC_REG, dev->pscstate); + + /* SCL low and high time values */ + omap_i2c_write_reg(dev, OMAP_I2C_SCLL_REG, dev->scllstate); + omap_i2c_write_reg(dev, OMAP_I2C_SCLH_REG, dev->sclhstate); + if (dev->rev >= OMAP_I2C_REV_ON_3430_3530) + omap_i2c_write_reg(dev, OMAP_I2C_WE_REG, dev->westate); + + /* Take the I2C module out of reset: */ + omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, OMAP_I2C_CON_EN); + + /* + * Don't write to this register if the IE state is 0 as it can + * cause deadlock. + */ + if (dev->iestate) + omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, dev->iestate); +} + +static int omap_i2c_reset(struct omap_i2c_dev *dev) { - u16 psc = 0, scll = 0, sclh = 0, buf = 0; - u16 fsscll = 0, fssclh = 0, hsscll = 0, hssclh = 0; - unsigned long fclk_rate = 12000000; unsigned long timeout; - unsigned long internal_clk = 0; - struct clk *fclk; + u16 sysc; if (dev->rev >= OMAP_I2C_OMAP1_REV_2) { + sysc = omap_i2c_read_reg(dev, OMAP_I2C_SYSC_REG); + /* Disable I2C controller before soft reset */ omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, omap_i2c_read_reg(dev, OMAP_I2C_CON_REG) & @@ -306,32 +331,28 @@ static int omap_i2c_init(struct omap_i2c_dev *dev) } /* SYSC register is cleared by the reset; rewrite it */ - if (dev->rev == OMAP_I2C_REV_ON_2430) { - - omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, - SYSC_AUTOIDLE_MASK); - - } else if (dev->rev >= OMAP_I2C_REV_ON_3430_3530) { - dev->syscstate = SYSC_AUTOIDLE_MASK; - dev->syscstate |= SYSC_ENAWAKEUP_MASK; - dev->syscstate |= (SYSC_IDLEMODE_SMART << - __ffs(SYSC_SIDLEMODE_MASK)); - dev->syscstate |= (SYSC_CLOCKACTIVITY_FCLK << - __ffs(SYSC_CLOCKACTIVITY_MASK)); - - omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, - dev->syscstate); - /* - * Enabling all wakup sources to stop I2C freezing on - * WFI instruction. - * REVISIT: Some wkup sources might not be needed. - */ - dev->westate = OMAP_I2C_WE_ALL; - omap_i2c_write_reg(dev, OMAP_I2C_WE_REG, - dev->westate); - } + omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, sysc); + + } + return 0; +} + +static int omap_i2c_init(struct omap_i2c_dev *dev) +{ + u16 psc = 0, scll = 0, sclh = 0; + u16 fsscll = 0, fssclh = 0, hsscll = 0, hssclh = 0; + unsigned long fclk_rate = 12000000; + unsigned long internal_clk = 0; + struct clk *fclk; + + if (dev->rev >= OMAP_I2C_REV_ON_3430_3530) { + /* + * Enabling all wakup sources to stop I2C freezing on + * WFI instruction. + * REVISIT: Some wkup sources might not be needed. + */ + dev->westate = OMAP_I2C_WE_ALL; } - omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0); if (dev->flags & OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK) { /* @@ -416,28 +437,17 @@ static int omap_i2c_init(struct omap_i2c_dev *dev) sclh = fclk_rate / (dev->speed * 2) - 7 + psc; } - /* Setup clock prescaler to obtain approx 12MHz I2C module clock: */ - omap_i2c_write_reg(dev, OMAP_I2C_PSC_REG, psc); - - /* SCL low and high time values */ - omap_i2c_write_reg(dev, OMAP_I2C_SCLL_REG, scll); - omap_i2c_write_reg(dev, OMAP_I2C_SCLH_REG, sclh); - - /* Take the I2C module out of reset: */ - omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, OMAP_I2C_CON_EN); - - /* Enable interrupts */ dev->iestate = (OMAP_I2C_IE_XRDY | OMAP_I2C_IE_RRDY | OMAP_I2C_IE_ARDY | OMAP_I2C_IE_NACK | OMAP_I2C_IE_AL) | ((dev->fifo_size) ? (OMAP_I2C_IE_RDR | OMAP_I2C_IE_XDR) : 0); - omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, dev->iestate); - if (dev->flags & OMAP_I2C_FLAG_RESET_REGS_POSTIDLE) { - dev->pscstate = psc; - dev->scllstate = scll; - dev->sclhstate = sclh; - dev->bufstate = buf; - } + + dev->pscstate = psc; + dev->scllstate = scll; + dev->sclhstate = sclh; + + __omap_i2c_init(dev); + return 0; } @@ -490,11 +500,13 @@ static void omap_i2c_resize_fifo(struct omap_i2c_dev *dev, u8 size, bool is_rx) omap_i2c_write_reg(dev, OMAP_I2C_BUF_REG, buf); - if (dev->rev < OMAP_I2C_REV_ON_3630_4430) + if (dev->rev < OMAP_I2C_REV_ON_3630) dev->b_hw = 1; /* Enable hardware fixes */ /* calculate wakeup latency constraint for MPU */ - dev->latency = (1000000 * dev->threshold) / (1000 * dev->speed / 8); + if (dev->set_mpu_wkup_lat != NULL) + dev->latency = (1000000 * dev->threshold) / + (1000 * dev->speed / 8); } /* @@ -522,6 +534,9 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, dev->buf = msg->buf; dev->buf_len = msg->len; + /* make sure writes to dev->buf_len are ordered */ + barrier(); + omap_i2c_write_reg(dev, OMAP_I2C_CNT_REG, dev->buf_len); /* Clear the FIFO Buffers */ @@ -579,10 +594,10 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, */ timeout = wait_for_completion_timeout(&dev->cmd_complete, OMAP_I2C_TIMEOUT); - dev->buf_len = 0; if (timeout == 0) { dev_err(dev->dev, "controller timed out\n"); - omap_i2c_init(dev); + omap_i2c_reset(dev); + __omap_i2c_init(dev); return -ETIMEDOUT; } @@ -592,7 +607,8 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, /* We have an error */ if (dev->cmd_err & (OMAP_I2C_STAT_AL | OMAP_I2C_STAT_ROVR | OMAP_I2C_STAT_XUDF)) { - omap_i2c_init(dev); + omap_i2c_reset(dev); + __omap_i2c_init(dev); return -EIO; } @@ -629,16 +645,8 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) if (r < 0) goto out; - /* - * When waiting for completion of a i2c transfer, we need to - * set a wake up latency constraint for the MPU. This is to - * ensure quick enough wakeup from idle, when transfer - * completes. - */ - if (dev->latency) - pm_qos_add_request(&dev->pm_qos_request, - PM_QOS_CPU_DMA_LATENCY, - dev->latency); + if (dev->set_mpu_wkup_lat != NULL) + dev->set_mpu_wkup_lat(dev->dev, dev->latency); for (i = 0; i < num; i++) { r = omap_i2c_xfer_msg(adap, &msgs[i], (i == (num - 1))); @@ -646,13 +654,14 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) break; } - if (dev->latency) - pm_qos_remove_request(&dev->pm_qos_request); - if (r == 0) r = num; omap_i2c_wait_for_bb(dev); + + if (dev->set_mpu_wkup_lat != NULL) + dev->set_mpu_wkup_lat(dev->dev, -1); + out: pm_runtime_mark_last_busy(dev->dev); pm_runtime_put_autosuspend(dev->dev); @@ -794,7 +803,7 @@ static int errata_omap3_i462(struct omap_i2c_dev *dev) if (stat & OMAP_I2C_STAT_AL) { dev_err(dev->dev, "Arbitration lost\n"); dev->cmd_err |= OMAP_I2C_STAT_AL; - omap_i2c_ack_stat(dev, OMAP_I2C_STAT_NACK); + omap_i2c_ack_stat(dev, OMAP_I2C_STAT_AL); } return -EIO; @@ -954,7 +963,7 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) i2c_omap_errata_i207(dev, stat); omap_i2c_ack_stat(dev, OMAP_I2C_STAT_RDR); - break; + continue; } if (stat & OMAP_I2C_STAT_RRDY) { @@ -980,7 +989,7 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) break; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_XDR); - break; + continue; } if (stat & OMAP_I2C_STAT_XRDY) { @@ -1029,9 +1038,7 @@ static const struct i2c_algorithm omap_i2c_algo = { #ifdef CONFIG_OF static struct omap_i2c_bus_platform_data omap3_pdata = { .rev = OMAP_I2C_IP_VERSION_1, - .flags = OMAP_I2C_FLAG_APPLY_ERRATA_I207 | - OMAP_I2C_FLAG_RESET_REGS_POSTIDLE | - OMAP_I2C_FLAG_BUS_SHIFT_2, + .flags = OMAP_I2C_FLAG_BUS_SHIFT_2, }; static struct omap_i2c_bus_platform_data omap4_pdata = { @@ -1052,7 +1059,17 @@ static const struct of_device_id omap_i2c_of_match[] = { MODULE_DEVICE_TABLE(of, omap_i2c_of_match); #endif -static int __devinit +#define OMAP_I2C_SCHEME(rev) ((rev & 0xc000) >> 14) + +#define OMAP_I2C_REV_SCHEME_0_MAJOR(rev) (rev >> 4) +#define OMAP_I2C_REV_SCHEME_0_MINOR(rev) (rev & 0xf) + +#define OMAP_I2C_REV_SCHEME_1_MAJOR(rev) ((rev & 0x0700) >> 7) +#define OMAP_I2C_REV_SCHEME_1_MINOR(rev) (rev & 0x1f) +#define OMAP_I2C_SCHEME_0 0 +#define OMAP_I2C_SCHEME_1 1 + +static int omap_i2c_probe(struct platform_device *pdev) { struct omap_i2c_dev *dev; @@ -1064,6 +1081,8 @@ omap_i2c_probe(struct platform_device *pdev) const struct of_device_id *match; int irq; int r; + u32 rev; + u16 minor, major, scheme; /* NOTE: driver uses the static register mapping */ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -1084,18 +1103,15 @@ omap_i2c_probe(struct platform_device *pdev) return -ENOMEM; } - dev->base = devm_request_and_ioremap(&pdev->dev, mem); - if (!dev->base) { - dev_err(&pdev->dev, "I2C region already claimed\n"); - return -ENOMEM; - } + dev->base = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(dev->base)) + return PTR_ERR(dev->base); match = of_match_device(of_match_ptr(omap_i2c_of_match), &pdev->dev); if (match) { u32 freq = 100000; /* default to 100000 Hz */ pdata = match->data; - dev->dtrev = pdata->rev; dev->flags = pdata->flags; of_property_read_u32(node, "clock-frequency", &freq); @@ -1104,7 +1120,17 @@ omap_i2c_probe(struct platform_device *pdev) } else if (pdata != NULL) { dev->speed = pdata->clkrate; dev->flags = pdata->flags; - dev->dtrev = pdata->rev; + dev->set_mpu_wkup_lat = pdata->set_mpu_wkup_lat; + } + + dev->pins = devm_pinctrl_get_select_default(&pdev->dev); + if (IS_ERR(dev->pins)) { + if (PTR_ERR(dev->pins) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + dev_warn(&pdev->dev, "did not get pins for i2c error: %li\n", + PTR_ERR(dev->pins)); + dev->pins = NULL; } dev->dev = &pdev->dev; @@ -1117,11 +1143,6 @@ omap_i2c_probe(struct platform_device *pdev) dev->reg_shift = (dev->flags >> OMAP_I2C_FLAG_BUS_SHIFT__SHIFT) & 3; - if (dev->dtrev == OMAP_I2C_IP_VERSION_2) - dev->regs = (u8 *)reg_map_ip_v2; - else - dev->regs = (u8 *)reg_map_ip_v1; - pm_runtime_enable(dev->dev); pm_runtime_set_autosuspend_delay(dev->dev, OMAP_I2C_PM_TIMEOUT); pm_runtime_use_autosuspend(dev->dev); @@ -1130,11 +1151,37 @@ omap_i2c_probe(struct platform_device *pdev) if (IS_ERR_VALUE(r)) goto err_free_mem; - dev->rev = omap_i2c_read_reg(dev, OMAP_I2C_REV_REG) & 0xff; + /* + * Read the Rev hi bit-[15:14] ie scheme this is 1 indicates ver2. + * On omap1/3/2 Offset 4 is IE Reg the bit [15:14] is 0 at reset. + * Also since the omap_i2c_read_reg uses reg_map_ip_* a + * raw_readw is done. + */ + rev = __raw_readw(dev->base + 0x04); + + scheme = OMAP_I2C_SCHEME(rev); + switch (scheme) { + case OMAP_I2C_SCHEME_0: + dev->regs = (u8 *)reg_map_ip_v1; + dev->rev = omap_i2c_read_reg(dev, OMAP_I2C_REV_REG); + minor = OMAP_I2C_REV_SCHEME_0_MAJOR(dev->rev); + major = OMAP_I2C_REV_SCHEME_0_MAJOR(dev->rev); + break; + case OMAP_I2C_SCHEME_1: + /* FALLTHROUGH */ + default: + dev->regs = (u8 *)reg_map_ip_v2; + rev = (rev << 16) | + omap_i2c_read_reg(dev, OMAP_I2C_IP_V2_REVNB_LO); + minor = OMAP_I2C_REV_SCHEME_1_MINOR(rev); + major = OMAP_I2C_REV_SCHEME_1_MAJOR(rev); + dev->rev = rev; + } dev->errata = 0; - if (dev->flags & OMAP_I2C_FLAG_APPLY_ERRATA_I207) + if (dev->rev >= OMAP_I2C_REV_ON_2430 && + dev->rev < OMAP_I2C_REV_ON_4430_PLUS) dev->errata |= I2C_OMAP_ERRATA_I207; if (dev->rev <= OMAP_I2C_REV_ON_3430_3530) @@ -1155,12 +1202,13 @@ omap_i2c_probe(struct platform_device *pdev) dev->fifo_size = (dev->fifo_size / 2); - if (dev->rev < OMAP_I2C_REV_ON_3630_4430) + if (dev->rev < OMAP_I2C_REV_ON_3630) dev->b_hw = 1; /* Enable hardware fixes */ /* calculate wakeup latency constraint for MPU */ - dev->latency = (1000000 * dev->fifo_size) / - (1000 * dev->speed / 8); + if (dev->set_mpu_wkup_lat != NULL) + dev->latency = (1000000 * dev->fifo_size) / + (1000 * dev->speed / 8); } /* reset ASAP, clearing any IRQs */ @@ -1197,8 +1245,8 @@ omap_i2c_probe(struct platform_device *pdev) goto err_unuse_clocks; } - dev_info(dev->dev, "bus %d rev%d.%d.%d at %d kHz\n", adap->nr, - dev->dtrev, dev->rev >> 4, dev->rev & 0xf, dev->speed); + dev_info(dev->dev, "bus %d rev%d.%d at %d kHz\n", adap->nr, + major, minor, dev->speed); of_i2c_register_devices(adap); @@ -1212,18 +1260,15 @@ err_unuse_clocks: pm_runtime_put(dev->dev); pm_runtime_disable(&pdev->dev); err_free_mem: - platform_set_drvdata(pdev, NULL); return r; } -static int __devexit omap_i2c_remove(struct platform_device *pdev) +static int omap_i2c_remove(struct platform_device *pdev) { struct omap_i2c_dev *dev = platform_get_drvdata(pdev); int ret; - platform_set_drvdata(pdev, NULL); - i2c_del_adapter(&dev->adapter); ret = pm_runtime_get_sync(&pdev->dev); if (IS_ERR_VALUE(ret)) @@ -1241,14 +1286,13 @@ static int omap_i2c_runtime_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct omap_i2c_dev *_dev = platform_get_drvdata(pdev); - u16 iv; _dev->iestate = omap_i2c_read_reg(_dev, OMAP_I2C_IE_REG); omap_i2c_write_reg(_dev, OMAP_I2C_IE_REG, 0); if (_dev->rev < OMAP_I2C_OMAP1_REV_2) { - iv = omap_i2c_read_reg(_dev, OMAP_I2C_IV_REG); /* Read clears */ + omap_i2c_read_reg(_dev, OMAP_I2C_IV_REG); /* Read clears */ } else { omap_i2c_write_reg(_dev, OMAP_I2C_STAT_REG, _dev->iestate); @@ -1264,23 +1308,10 @@ static int omap_i2c_runtime_resume(struct device *dev) struct platform_device *pdev = to_platform_device(dev); struct omap_i2c_dev *_dev = platform_get_drvdata(pdev); - if (_dev->flags & OMAP_I2C_FLAG_RESET_REGS_POSTIDLE) { - omap_i2c_write_reg(_dev, OMAP_I2C_CON_REG, 0); - omap_i2c_write_reg(_dev, OMAP_I2C_PSC_REG, _dev->pscstate); - omap_i2c_write_reg(_dev, OMAP_I2C_SCLL_REG, _dev->scllstate); - omap_i2c_write_reg(_dev, OMAP_I2C_SCLH_REG, _dev->sclhstate); - omap_i2c_write_reg(_dev, OMAP_I2C_BUF_REG, _dev->bufstate); - omap_i2c_write_reg(_dev, OMAP_I2C_SYSC_REG, _dev->syscstate); - omap_i2c_write_reg(_dev, OMAP_I2C_WE_REG, _dev->westate); - omap_i2c_write_reg(_dev, OMAP_I2C_CON_REG, OMAP_I2C_CON_EN); - } + if (!_dev->regs) + return 0; - /* - * Don't write to this register if the IE state is 0 as it can - * cause deadlock. - */ - if (_dev->iestate) - omap_i2c_write_reg(_dev, OMAP_I2C_IE_REG, _dev->iestate); + __omap_i2c_init(_dev); return 0; } @@ -1297,7 +1328,7 @@ static struct dev_pm_ops omap_i2c_pm_ops = { static struct platform_driver omap_i2c_driver = { .probe = omap_i2c_probe, - .remove = __devexit_p(omap_i2c_remove), + .remove = omap_i2c_remove, .driver = { .name = "omap_i2c", .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-parport-light.c b/drivers/i2c/busses/i2c-parport-light.c index 4b95f7a63a3b..aa9577881925 100644 --- a/drivers/i2c/busses/i2c-parport-light.c +++ b/drivers/i2c/busses/i2c-parport-light.c @@ -135,7 +135,7 @@ static struct lineop parport_ctrl_irq = { .port = PORT_CTRL, }; -static int __devinit i2c_parport_probe(struct platform_device *pdev) +static int i2c_parport_probe(struct platform_device *pdev) { int err; @@ -169,7 +169,7 @@ static int __devinit i2c_parport_probe(struct platform_device *pdev) return 0; } -static int __devexit i2c_parport_remove(struct platform_device *pdev) +static int i2c_parport_remove(struct platform_device *pdev) { if (ara) { line_set(0, &parport_ctrl_irq); @@ -191,7 +191,7 @@ static struct platform_driver i2c_parport_driver = { .name = DRVNAME, }, .probe = i2c_parport_probe, - .remove = __devexit_p(i2c_parport_remove), + .remove = i2c_parport_remove, }; static int __init i2c_parport_device_add(u16 address) diff --git a/drivers/i2c/busses/i2c-pasemi.c b/drivers/i2c/busses/i2c-pasemi.c index 12edefd4183a..615f632c846f 100644 --- a/drivers/i2c/busses/i2c-pasemi.c +++ b/drivers/i2c/busses/i2c-pasemi.c @@ -340,7 +340,7 @@ static const struct i2c_algorithm smbus_algorithm = { .functionality = pasemi_smb_func, }; -static int __devinit pasemi_smb_probe(struct pci_dev *dev, +static int pasemi_smb_probe(struct pci_dev *dev, const struct pci_device_id *id) { struct pasemi_smbus *smbus; @@ -392,7 +392,7 @@ static int __devinit pasemi_smb_probe(struct pci_dev *dev, return error; } -static void __devexit pasemi_smb_remove(struct pci_dev *dev) +static void pasemi_smb_remove(struct pci_dev *dev) { struct pasemi_smbus *smbus = pci_get_drvdata(dev); @@ -412,7 +412,7 @@ static struct pci_driver pasemi_smb_driver = { .name = "i2c-pasemi", .id_table = pasemi_smb_ids, .probe = pasemi_smb_probe, - .remove = __devexit_p(pasemi_smb_remove), + .remove = pasemi_smb_remove, }; module_pci_driver(pasemi_smb_driver); diff --git a/drivers/i2c/busses/i2c-pca-isa.c b/drivers/i2c/busses/i2c-pca-isa.c index 29933f87d8fa..323f061a3163 100644 --- a/drivers/i2c/busses/i2c-pca-isa.c +++ b/drivers/i2c/busses/i2c-pca-isa.c @@ -119,7 +119,7 @@ static struct i2c_adapter pca_isa_ops = { .timeout = HZ, }; -static int __devinit pca_isa_match(struct device *dev, unsigned int id) +static int pca_isa_match(struct device *dev, unsigned int id) { int match = base != 0; @@ -132,7 +132,7 @@ static int __devinit pca_isa_match(struct device *dev, unsigned int id) return match; } -static int __devinit pca_isa_probe(struct device *dev, unsigned int id) +static int pca_isa_probe(struct device *dev, unsigned int id) { init_waitqueue_head(&pca_wait); @@ -174,7 +174,7 @@ static int __devinit pca_isa_probe(struct device *dev, unsigned int id) return -ENODEV; } -static int __devexit pca_isa_remove(struct device *dev, unsigned int id) +static int pca_isa_remove(struct device *dev, unsigned int id) { i2c_del_adapter(&pca_isa_ops); @@ -190,7 +190,7 @@ static int __devexit pca_isa_remove(struct device *dev, unsigned int id) static struct isa_driver pca_isa_driver = { .match = pca_isa_match, .probe = pca_isa_probe, - .remove = __devexit_p(pca_isa_remove), + .remove = pca_isa_remove, .driver = { .owner = THIS_MODULE, .name = DRIVER, diff --git a/drivers/i2c/busses/i2c-pca-platform.c b/drivers/i2c/busses/i2c-pca-platform.c index 675878f49f76..aa00df14e30b 100644 --- a/drivers/i2c/busses/i2c-pca-platform.c +++ b/drivers/i2c/busses/i2c-pca-platform.c @@ -131,7 +131,7 @@ static irqreturn_t i2c_pca_pf_handler(int this_irq, void *dev_id) } -static int __devinit i2c_pca_pf_probe(struct platform_device *pdev) +static int i2c_pca_pf_probe(struct platform_device *pdev) { struct i2c_pca_pf_data *i2c; struct resource *res; @@ -257,10 +257,9 @@ e_print: return ret; } -static int __devexit i2c_pca_pf_remove(struct platform_device *pdev) +static int i2c_pca_pf_remove(struct platform_device *pdev) { struct i2c_pca_pf_data *i2c = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&i2c->adap); @@ -279,7 +278,7 @@ static int __devexit i2c_pca_pf_remove(struct platform_device *pdev) static struct platform_driver i2c_pca_pf_driver = { .probe = i2c_pca_pf_probe, - .remove = __devexit_p(i2c_pca_pf_remove), + .remove = i2c_pca_pf_remove, .driver = { .name = "i2c-pca-platform", .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c index 8bbd6ece7c41..39ab78c1a02c 100644 --- a/drivers/i2c/busses/i2c-piix4.c +++ b/drivers/i2c/busses/i2c-piix4.c @@ -99,7 +99,7 @@ MODULE_PARM_DESC(force_addr, static int srvrworks_csb5_delay; static struct pci_driver piix4_driver; -static struct dmi_system_id __devinitdata piix4_dmi_blacklist[] = { +static const struct dmi_system_id piix4_dmi_blacklist[] = { { .ident = "Sapphire AM2RD790", .matches = { @@ -119,7 +119,7 @@ static struct dmi_system_id __devinitdata piix4_dmi_blacklist[] = { /* The IBM entry is in a separate table because we only check it on Intel-based systems */ -static struct dmi_system_id __devinitdata piix4_dmi_ibm[] = { +static const struct dmi_system_id piix4_dmi_ibm[] = { { .ident = "IBM", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "IBM"), }, @@ -131,8 +131,8 @@ struct i2c_piix4_adapdata { unsigned short smba; }; -static int __devinit piix4_setup(struct pci_dev *PIIX4_dev, - const struct pci_device_id *id) +static int piix4_setup(struct pci_dev *PIIX4_dev, + const struct pci_device_id *id) { unsigned char temp; unsigned short piix4_smba; @@ -204,9 +204,8 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev, */ pci_write_config_byte(PIIX4_dev, SMBHSTCFG, temp | 1); - dev_printk(KERN_NOTICE, &PIIX4_dev->dev, - "WARNING: SMBus interface has been " - "FORCEFULLY ENABLED!\n"); + dev_notice(&PIIX4_dev->dev, + "WARNING: SMBus interface has been FORCEFULLY ENABLED!\n"); } else { dev_err(&PIIX4_dev->dev, "Host SMBus controller not enabled!\n"); @@ -231,8 +230,8 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev, return piix4_smba; } -static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev, - const struct pci_device_id *id) +static int piix4_setup_sb800(struct pci_dev *PIIX4_dev, + const struct pci_device_id *id) { unsigned short piix4_smba; unsigned short smba_idx = 0xcd6; @@ -295,9 +294,9 @@ static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev, return piix4_smba; } -static int __devinit piix4_setup_aux(struct pci_dev *PIIX4_dev, - const struct pci_device_id *id, - unsigned short base_reg_addr) +static int piix4_setup_aux(struct pci_dev *PIIX4_dev, + const struct pci_device_id *id, + unsigned short base_reg_addr) { /* Set up auxiliary SMBus controllers found on some * AMD chipsets e.g. SP5100 (SB700 derivative) */ @@ -541,9 +540,8 @@ MODULE_DEVICE_TABLE (pci, piix4_ids); static struct i2c_adapter *piix4_main_adapter; static struct i2c_adapter *piix4_aux_adapter; -static int __devinit piix4_add_adapter(struct pci_dev *dev, - unsigned short smba, - struct i2c_adapter **padap) +static int piix4_add_adapter(struct pci_dev *dev, unsigned short smba, + struct i2c_adapter **padap) { struct i2c_adapter *adap; struct i2c_piix4_adapdata *adapdata; @@ -589,8 +587,7 @@ static int __devinit piix4_add_adapter(struct pci_dev *dev, return 0; } -static int __devinit piix4_probe(struct pci_dev *dev, - const struct pci_device_id *id) +static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id) { int retval; @@ -627,7 +624,7 @@ static int __devinit piix4_probe(struct pci_dev *dev, return 0; } -static void __devexit piix4_adap_remove(struct i2c_adapter *adap) +static void piix4_adap_remove(struct i2c_adapter *adap) { struct i2c_piix4_adapdata *adapdata = i2c_get_adapdata(adap); @@ -639,7 +636,7 @@ static void __devexit piix4_adap_remove(struct i2c_adapter *adap) } } -static void __devexit piix4_remove(struct pci_dev *dev) +static void piix4_remove(struct pci_dev *dev) { if (piix4_main_adapter) { piix4_adap_remove(piix4_main_adapter); @@ -656,7 +653,7 @@ static struct pci_driver piix4_driver = { .name = "piix4_smbus", .id_table = piix4_ids, .probe = piix4_probe, - .remove = __devexit_p(piix4_remove), + .remove = piix4_remove, }; module_pci_driver(piix4_driver); diff --git a/drivers/i2c/busses/i2c-pmcmsp.c b/drivers/i2c/busses/i2c-pmcmsp.c index 3d71395ae1f7..f6389e2c9d02 100644 --- a/drivers/i2c/busses/i2c-pmcmsp.c +++ b/drivers/i2c/busses/i2c-pmcmsp.c @@ -270,7 +270,7 @@ static irqreturn_t pmcmsptwi_interrupt(int irq, void *ptr) /* * Probe for and register the device and return 0 if there is one. */ -static int __devinit pmcmsptwi_probe(struct platform_device *pldev) +static int pmcmsptwi_probe(struct platform_device *pldev) { struct resource *res; int rc = -ENODEV; @@ -349,7 +349,6 @@ static int __devinit pmcmsptwi_probe(struct platform_device *pldev) return 0; ret_unmap: - platform_set_drvdata(pldev, NULL); if (pmcmsptwi_data.irq) { pmcmsptwi_writel(0, pmcmsptwi_data.iobase + MSP_TWI_INT_MSK_REG_OFFSET); @@ -368,13 +367,12 @@ ret_err: /* * Release the device and return 0 if there is one. */ -static int __devexit pmcmsptwi_remove(struct platform_device *pldev) +static int pmcmsptwi_remove(struct platform_device *pldev) { struct resource *res; i2c_del_adapter(&pmcmsptwi_adapter); - platform_set_drvdata(pldev, NULL); if (pmcmsptwi_data.irq) { pmcmsptwi_writel(0, pmcmsptwi_data.iobase + MSP_TWI_INT_MSK_REG_OFFSET); @@ -628,7 +626,7 @@ static struct i2c_adapter pmcmsptwi_adapter = { static struct platform_driver pmcmsptwi_driver = { .probe = pmcmsptwi_probe, - .remove = __devexit_p(pmcmsptwi_remove), + .remove = pmcmsptwi_remove, .driver = { .name = DRV_NAME, .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c index 8488bddfe465..5f39c6d8117a 100644 --- a/drivers/i2c/busses/i2c-pnx.c +++ b/drivers/i2c/busses/i2c-pnx.c @@ -619,7 +619,7 @@ static SIMPLE_DEV_PM_OPS(i2c_pnx_pm, #define PNX_I2C_PM NULL #endif -static int __devinit i2c_pnx_probe(struct platform_device *pdev) +static int i2c_pnx_probe(struct platform_device *pdev) { unsigned long tmp; int ret = 0; @@ -761,11 +761,10 @@ out_clkget: out_drvdata: kfree(alg_data); err_kzalloc: - platform_set_drvdata(pdev, NULL); return ret; } -static int __devexit i2c_pnx_remove(struct platform_device *pdev) +static int i2c_pnx_remove(struct platform_device *pdev) { struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev); @@ -776,7 +775,6 @@ static int __devexit i2c_pnx_remove(struct platform_device *pdev) release_mem_region(alg_data->base, I2C_PNX_REGION_SIZE); clk_put(alg_data->clk); kfree(alg_data); - platform_set_drvdata(pdev, NULL); return 0; } @@ -797,7 +795,7 @@ static struct platform_driver i2c_pnx_driver = { .pm = PNX_I2C_PM, }, .probe = i2c_pnx_probe, - .remove = __devexit_p(i2c_pnx_remove), + .remove = i2c_pnx_remove, }; static int __init i2c_adap_pnx_init(void) diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c index 5285f8565de4..da54e673449d 100644 --- a/drivers/i2c/busses/i2c-powermac.c +++ b/drivers/i2c/busses/i2c-powermac.c @@ -210,7 +210,7 @@ static const struct i2c_algorithm i2c_powermac_algorithm = { }; -static int __devexit i2c_powermac_remove(struct platform_device *dev) +static int i2c_powermac_remove(struct platform_device *dev) { struct i2c_adapter *adapter = platform_get_drvdata(dev); int rc; @@ -221,13 +221,12 @@ static int __devexit i2c_powermac_remove(struct platform_device *dev) printk(KERN_WARNING "i2c-powermac.c: Failed to remove bus %s !\n", adapter->name); - platform_set_drvdata(dev, NULL); memset(adapter, 0, sizeof(*adapter)); return 0; } -static u32 __devinit i2c_powermac_get_addr(struct i2c_adapter *adap, +static u32 i2c_powermac_get_addr(struct i2c_adapter *adap, struct pmac_i2c_bus *bus, struct device_node *node) { @@ -255,7 +254,7 @@ static u32 __devinit i2c_powermac_get_addr(struct i2c_adapter *adap, return 0xffffffff; } -static void __devinit i2c_powermac_create_one(struct i2c_adapter *adap, +static void i2c_powermac_create_one(struct i2c_adapter *adap, const char *type, u32 addr) { @@ -271,7 +270,7 @@ static void __devinit i2c_powermac_create_one(struct i2c_adapter *adap, type); } -static void __devinit i2c_powermac_add_missing(struct i2c_adapter *adap, +static void i2c_powermac_add_missing(struct i2c_adapter *adap, struct pmac_i2c_bus *bus, bool found_onyx) { @@ -297,7 +296,7 @@ static void __devinit i2c_powermac_add_missing(struct i2c_adapter *adap, } } -static bool __devinit i2c_powermac_get_type(struct i2c_adapter *adap, +static bool i2c_powermac_get_type(struct i2c_adapter *adap, struct device_node *node, u32 addr, char *type, int type_size) { @@ -336,7 +335,7 @@ static bool __devinit i2c_powermac_get_type(struct i2c_adapter *adap, return false; } -static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap, +static void i2c_powermac_register_devices(struct i2c_adapter *adap, struct pmac_i2c_bus *bus) { struct i2c_client *newdev; @@ -403,7 +402,7 @@ static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap, i2c_powermac_add_missing(adap, bus, found_onyx); } -static int __devinit i2c_powermac_probe(struct platform_device *dev) +static int i2c_powermac_probe(struct platform_device *dev) { struct pmac_i2c_bus *bus = dev->dev.platform_data; struct device_node *parent = NULL; @@ -467,7 +466,7 @@ static int __devinit i2c_powermac_probe(struct platform_device *dev) static struct platform_driver i2c_powermac_driver = { .probe = i2c_powermac_probe, - .remove = __devexit_p(i2c_powermac_remove), + .remove = i2c_powermac_remove, .driver = { .name = "i2c-powermac", .bus = &platform_bus_type, diff --git a/drivers/i2c/busses/i2c-puv3.c b/drivers/i2c/busses/i2c-puv3.c index d8515be00b98..261d7db437e2 100644 --- a/drivers/i2c/busses/i2c-puv3.c +++ b/drivers/i2c/busses/i2c-puv3.c @@ -184,7 +184,7 @@ static struct i2c_algorithm puv3_i2c_algorithm = { /* * Main initialization routine. */ -static int __devinit puv3_i2c_probe(struct platform_device *pdev) +static int puv3_i2c_probe(struct platform_device *pdev) { struct i2c_adapter *adapter; struct resource *mem; @@ -223,7 +223,6 @@ static int __devinit puv3_i2c_probe(struct platform_device *pdev) return 0; fail_add_adapter: - platform_set_drvdata(pdev, NULL); kfree(adapter); fail_nomem: release_mem_region(mem->start, resource_size(mem)); @@ -231,7 +230,7 @@ fail_nomem: return rc; } -static int __devexit puv3_i2c_remove(struct platform_device *pdev) +static int puv3_i2c_remove(struct platform_device *pdev) { struct i2c_adapter *adapter = platform_get_drvdata(pdev); struct resource *mem; @@ -245,7 +244,6 @@ static int __devexit puv3_i2c_remove(struct platform_device *pdev) } put_device(&pdev->dev); - platform_set_drvdata(pdev, NULL); mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); release_mem_region(mem->start, resource_size(mem)); @@ -276,7 +274,7 @@ static SIMPLE_DEV_PM_OPS(puv3_i2c_pm, puv3_i2c_suspend, NULL); static struct platform_driver puv3_i2c_driver = { .probe = puv3_i2c_probe, - .remove = __devexit_p(puv3_i2c_remove), + .remove = puv3_i2c_remove, .driver = { .name = "PKUnity-v3-I2C", .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-pxa-pci.c b/drivers/i2c/busses/i2c-pxa-pci.c index 4dc9bef17d77..9639be86e53f 100644 --- a/drivers/i2c/busses/i2c-pxa-pci.c +++ b/drivers/i2c/busses/i2c-pxa-pci.c @@ -94,7 +94,7 @@ out: return ERR_PTR(ret); } -static int __devinit ce4100_i2c_probe(struct pci_dev *dev, +static int ce4100_i2c_probe(struct pci_dev *dev, const struct pci_device_id *ent) { int ret; @@ -128,20 +128,18 @@ static int __devinit ce4100_i2c_probe(struct pci_dev *dev, return 0; err_dev_add: - pci_set_drvdata(dev, NULL); kfree(sds); err_mem: pci_disable_device(dev); return ret; } -static void __devexit ce4100_i2c_remove(struct pci_dev *dev) +static void ce4100_i2c_remove(struct pci_dev *dev) { struct ce4100_devices *sds; unsigned int i; sds = pci_get_drvdata(dev); - pci_set_drvdata(dev, NULL); for (i = 0; i < ARRAY_SIZE(sds->pdev); i++) platform_device_unregister(sds->pdev[i]); @@ -160,7 +158,7 @@ static struct pci_driver ce4100_i2c_driver = { .name = "ce4100_i2c", .id_table = ce4100_i2c_devices, .probe = ce4100_i2c_probe, - .remove = __devexit_p(ce4100_i2c_remove), + .remove = ce4100_i2c_remove, }; module_pci_driver(ce4100_i2c_driver); diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c index 1034d93fb838..1e88e8d66c55 100644 --- a/drivers/i2c/busses/i2c-pxa.c +++ b/drivers/i2c/busses/i2c-pxa.c @@ -1215,12 +1215,10 @@ emalloc: return ret; } -static int __exit i2c_pxa_remove(struct platform_device *dev) +static int i2c_pxa_remove(struct platform_device *dev) { struct pxa_i2c *i2c = platform_get_drvdata(dev); - platform_set_drvdata(dev, NULL); - i2c_del_adapter(&i2c->adap); if (!i2c->use_pio) free_irq(i2c->irq, i2c); @@ -1269,7 +1267,7 @@ static const struct dev_pm_ops i2c_pxa_dev_pm_ops = { static struct platform_driver i2c_pxa_driver = { .probe = i2c_pxa_probe, - .remove = __exit_p(i2c_pxa_remove), + .remove = i2c_pxa_remove, .driver = { .name = "pxa2xx-i2c", .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index f9399d163af2..4ba4a95b6b26 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -613,7 +613,7 @@ static const struct i2c_algorithm rcar_i2c_algo = { .functionality = rcar_i2c_func, }; -static int __devinit rcar_i2c_probe(struct platform_device *pdev) +static int rcar_i2c_probe(struct platform_device *pdev) { struct i2c_rcar_platform_data *pdata = pdev->dev.platform_data; struct rcar_i2c_priv *priv; @@ -642,11 +642,9 @@ static int __devinit rcar_i2c_probe(struct platform_device *pdev) if (ret < 0) return ret; - priv->io = devm_ioremap(dev, res->start, resource_size(res)); - if (!priv->io) { - dev_err(dev, "cannot ioremap\n"); - return -ENODEV; - } + priv->io = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->io)) + return PTR_ERR(priv->io); priv->irq = platform_get_irq(pdev, 0); init_waitqueue_head(&priv->wait); @@ -682,7 +680,7 @@ static int __devinit rcar_i2c_probe(struct platform_device *pdev) return 0; } -static int __devexit rcar_i2c_remove(struct platform_device *pdev) +static int rcar_i2c_remove(struct platform_device *pdev) { struct rcar_i2c_priv *priv = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; @@ -693,16 +691,16 @@ static int __devexit rcar_i2c_remove(struct platform_device *pdev) return 0; } -static struct platform_driver rcar_i2c_drv = { +static struct platform_driver rcar_i2c_driver = { .driver = { .name = "i2c-rcar", .owner = THIS_MODULE, }, .probe = rcar_i2c_probe, - .remove = __devexit_p(rcar_i2c_remove), + .remove = rcar_i2c_remove, }; -module_platform_driver(rcar_i2c_drv); +module_platform_driver(rcar_i2c_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Renesas R-Car I2C bus driver"); diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 3e0335f1fc60..f6b880ba1932 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -38,6 +38,7 @@ #include <linux/io.h> #include <linux/of_i2c.h> #include <linux/of_gpio.h> +#include <linux/pinctrl/consumer.h> #include <asm/irq.h> @@ -49,6 +50,9 @@ #define QUIRK_HDMIPHY (1 << 1) #define QUIRK_NO_GPIO (1 << 2) +/* Max time to wait for bus to become idle after a xfer (in us) */ +#define S3C2410_IDLE_TIMEOUT 5000 + /* i2c controller state */ enum s3c24xx_i2c_state { STATE_IDLE, @@ -59,7 +63,6 @@ enum s3c24xx_i2c_state { }; struct s3c24xx_i2c { - spinlock_t lock; wait_queue_head_t wait; unsigned int quirks; unsigned int suspended:1; @@ -78,11 +81,11 @@ struct s3c24xx_i2c { void __iomem *regs; struct clk *clk; struct device *dev; - struct resource *ioarea; struct i2c_adapter adap; struct s3c2410_platform_i2c *pdata; int gpios[2]; + struct pinctrl *pctrl; #ifdef CONFIG_CPU_FREQ struct notifier_block freq_transition; #endif @@ -108,6 +111,8 @@ static const struct of_device_id s3c24xx_i2c_match[] = { { .compatible = "samsung,s3c2440-i2c", .data = (void *)QUIRK_S3C2440 }, { .compatible = "samsung,s3c2440-hdmiphy-i2c", .data = (void *)(QUIRK_S3C2440 | QUIRK_HDMIPHY | QUIRK_NO_GPIO) }, + { .compatible = "samsung,exynos5440-i2c", + .data = (void *)(QUIRK_S3C2440 | QUIRK_NO_GPIO) }, {}, }; MODULE_DEVICE_TABLE(of, s3c24xx_i2c_match); @@ -208,7 +213,7 @@ static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c, if (msg->flags & I2C_M_REV_DIR_ADDR) addr ^= 1; - /* todo - check for wether ack wanted or not */ + /* todo - check for whether ack wanted or not */ s3c24xx_i2c_enable_ack(i2c); iiccon = readl(i2c->regs + S3C2410_IICCON); @@ -235,8 +240,47 @@ static inline void s3c24xx_i2c_stop(struct s3c24xx_i2c *i2c, int ret) dev_dbg(i2c->dev, "STOP\n"); - /* stop the transfer */ - iicstat &= ~S3C2410_IICSTAT_START; + /* + * The datasheet says that the STOP sequence should be: + * 1) I2CSTAT.5 = 0 - Clear BUSY (or 'generate STOP') + * 2) I2CCON.4 = 0 - Clear IRQPEND + * 3) Wait until the stop condition takes effect. + * 4*) I2CSTAT.4 = 0 - Clear TXRXEN + * + * Where, step "4*" is only for buses with the "HDMIPHY" quirk. + * + * However, after much experimentation, it appears that: + * a) normal buses automatically clear BUSY and transition from + * Master->Slave when they complete generating a STOP condition. + * Therefore, step (3) can be done in doxfer() by polling I2CCON.4 + * after starting the STOP generation here. + * b) HDMIPHY bus does neither, so there is no way to do step 3. + * There is no indication when this bus has finished generating + * STOP. + * + * In fact, we have found that as soon as the IRQPEND bit is cleared in + * step 2, the HDMIPHY bus generates the STOP condition, and then + * immediately starts transferring another data byte, even though the + * bus is supposedly stopped. This is presumably because the bus is + * still in "Master" mode, and its BUSY bit is still set. + * + * To avoid these extra post-STOP transactions on HDMI phy devices, we + * just disable Serial Output on the bus (I2CSTAT.4 = 0) directly, + * instead of first generating a proper STOP condition. This should + * float SDA & SCK terminating the transfer. Subsequent transfers + * start with a proper START condition, and proceed normally. + * + * The HDMIPHY bus is an internal bus that always has exactly two + * devices, the host as Master and the HDMIPHY device as the slave. + * Skipping the STOP condition has been tested on this bus and works. + */ + if (i2c->quirks & QUIRK_HDMIPHY) { + /* Stop driving the I2C pins */ + iicstat &= ~S3C2410_IICSTAT_TXRXEN; + } else { + /* stop the transfer */ + iicstat &= ~S3C2410_IICSTAT_START; + } writel(iicstat, i2c->regs + S3C2410_IICSTAT); i2c->state = STATE_STOP; @@ -397,7 +441,7 @@ static int i2c_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat) case STATE_READ: /* we have a byte of data in the data register, do - * something with it, and then work out wether we are + * something with it, and then work out whether we are * going to do any more read/write */ @@ -490,13 +534,6 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) unsigned long iicstat; int timeout = 400; - /* the timeout for HDMIPHY is reduced to 10 ms because - * the hangup is expected to happen, so waiting 400 ms - * causes only unnecessary system hangup - */ - if (i2c->quirks & QUIRK_HDMIPHY) - timeout = 10; - while (timeout-- > 0) { iicstat = readl(i2c->regs + S3C2410_IICSTAT); @@ -506,16 +543,61 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) msleep(1); } - /* hang-up of bus dedicated for HDMIPHY occurred, resetting */ - if (i2c->quirks & QUIRK_HDMIPHY) { - writel(0, i2c->regs + S3C2410_IICCON); - writel(0, i2c->regs + S3C2410_IICSTAT); - writel(0, i2c->regs + S3C2410_IICDS); + return -ETIMEDOUT; +} - return 0; +/* s3c24xx_i2c_wait_idle + * + * wait for the i2c bus to become idle. +*/ + +static void s3c24xx_i2c_wait_idle(struct s3c24xx_i2c *i2c) +{ + unsigned long iicstat; + ktime_t start, now; + unsigned long delay; + int spins; + + /* ensure the stop has been through the bus */ + + dev_dbg(i2c->dev, "waiting for bus idle\n"); + + start = now = ktime_get(); + + /* + * Most of the time, the bus is already idle within a few usec of the + * end of a transaction. However, really slow i2c devices can stretch + * the clock, delaying STOP generation. + * + * On slower SoCs this typically happens within a very small number of + * instructions so busy wait briefly to avoid scheduling overhead. + */ + spins = 3; + iicstat = readl(i2c->regs + S3C2410_IICSTAT); + while ((iicstat & S3C2410_IICSTAT_START) && --spins) { + cpu_relax(); + iicstat = readl(i2c->regs + S3C2410_IICSTAT); } - return -ETIMEDOUT; + /* + * If we do get an appreciable delay as a compromise between idle + * detection latency for the normal, fast case, and system load in the + * slow device case, use an exponential back off in the polling loop, + * up to 1/10th of the total timeout, then continue to poll at a + * constant rate up to the timeout. + */ + delay = 1; + while ((iicstat & S3C2410_IICSTAT_START) && + ktime_us_delta(now, start) < S3C2410_IDLE_TIMEOUT) { + usleep_range(delay, 2 * delay); + if (delay < S3C2410_IDLE_TIMEOUT / 10) + delay <<= 1; + now = ktime_get(); + iicstat = readl(i2c->regs + S3C2410_IICSTAT); + } + + if (iicstat & S3C2410_IICSTAT_START) + dev_warn(i2c->dev, "timeout waiting for bus idle\n"); } /* s3c24xx_i2c_doxfer @@ -526,8 +608,7 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c) static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int num) { - unsigned long iicstat, timeout; - int spins = 20; + unsigned long timeout; int ret; if (i2c->suspended) @@ -540,8 +621,6 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, goto out; } - spin_lock_irq(&i2c->lock); - i2c->msg = msgs; i2c->msg_num = num; i2c->msg_ptr = 0; @@ -550,7 +629,6 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, s3c24xx_i2c_enable_irq(i2c); s3c24xx_i2c_message_start(i2c, msgs); - spin_unlock_irq(&i2c->lock); timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5); @@ -564,24 +642,11 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, else if (ret != num) dev_dbg(i2c->dev, "incomplete xfer (%d)\n", ret); - /* ensure the stop has been through the bus */ - - dev_dbg(i2c->dev, "waiting for bus idle\n"); - - /* first, try busy waiting briefly */ - do { - cpu_relax(); - iicstat = readl(i2c->regs + S3C2410_IICSTAT); - } while ((iicstat & S3C2410_IICSTAT_START) && --spins); - - /* if that timed out sleep */ - if (!spins) { - msleep(1); - iicstat = readl(i2c->regs + S3C2410_IICSTAT); - } + /* For QUIRK_HDMIPHY, bus is already disabled */ + if (i2c->quirks & QUIRK_HDMIPHY) + goto out; - if (iicstat & S3C2410_IICSTAT_START) - dev_warn(i2c->dev, "timeout waiting for bus idle\n"); + s3c24xx_i2c_wait_idle(i2c); out: return ret; @@ -740,7 +805,6 @@ static int s3c24xx_i2c_cpufreq_transition(struct notifier_block *nb, unsigned long val, void *data) { struct s3c24xx_i2c *i2c = freq_to_i2c(nb); - unsigned long flags; unsigned int got; int delta_f; int ret; @@ -754,9 +818,9 @@ static int s3c24xx_i2c_cpufreq_transition(struct notifier_block *nb, if ((val == CPUFREQ_POSTCHANGE && delta_f < 0) || (val == CPUFREQ_PRECHANGE && delta_f > 0)) { - spin_lock_irqsave(&i2c->lock, flags); + i2c_lock_adapter(&i2c->adap); ret = s3c24xx_i2c_clockrate(i2c, &got); - spin_unlock_irqrestore(&i2c->lock, flags); + i2c_unlock_adapter(&i2c->adap); if (ret < 0) dev_err(i2c->dev, "cannot find frequency\n"); @@ -806,6 +870,7 @@ static int s3c24xx_i2c_parse_dt_gpio(struct s3c24xx_i2c *i2c) dev_err(i2c->dev, "invalid gpio[%d]: %d\n", idx, gpio); goto free_gpio; } + i2c->gpios[idx] = gpio; ret = gpio_request(gpio, "i2c-bus"); if (ret) { @@ -857,14 +922,6 @@ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c) pdata = i2c->pdata; - /* inititalise the gpio */ - - if (pdata->cfg_gpio) - pdata->cfg_gpio(to_platform_device(i2c->dev)); - else - if (s3c24xx_i2c_parse_dt_gpio(i2c)) - return -EINVAL; - /* write slave address */ writeb(pdata->slave_addr, i2c->regs + S3C2410_IICADD); @@ -945,8 +1002,8 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) i2c->pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!i2c->pdata) { - ret = -ENOMEM; - goto err_noclk; + dev_err(&pdev->dev, "no memory for platform data\n"); + return -ENOMEM; } i2c->quirks = s3c24xx_get_device_quirks(pdev); @@ -962,63 +1019,60 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) i2c->adap.class = I2C_CLASS_HWMON | I2C_CLASS_SPD; i2c->tx_setup = 50; - spin_lock_init(&i2c->lock); init_waitqueue_head(&i2c->wait); /* find the clock and enable it */ i2c->dev = &pdev->dev; - i2c->clk = clk_get(&pdev->dev, "i2c"); + i2c->clk = devm_clk_get(&pdev->dev, "i2c"); if (IS_ERR(i2c->clk)) { dev_err(&pdev->dev, "cannot get clock\n"); - ret = -ENOENT; - goto err_noclk; + return -ENOENT; } dev_dbg(&pdev->dev, "clock source %p\n", i2c->clk); - clk_prepare_enable(i2c->clk); /* map the registers */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "cannot find IO resource\n"); - ret = -ENOENT; - goto err_clk; + return -ENOENT; } - i2c->ioarea = request_mem_region(res->start, resource_size(res), - pdev->name); - - if (i2c->ioarea == NULL) { - dev_err(&pdev->dev, "cannot request IO\n"); - ret = -ENXIO; - goto err_clk; - } + i2c->regs = devm_ioremap_resource(&pdev->dev, res); - i2c->regs = ioremap(res->start, resource_size(res)); - - if (i2c->regs == NULL) { - dev_err(&pdev->dev, "cannot map IO\n"); - ret = -ENXIO; - goto err_ioarea; - } + if (IS_ERR(i2c->regs)) + return PTR_ERR(i2c->regs); - dev_dbg(&pdev->dev, "registers %p (%p, %p)\n", - i2c->regs, i2c->ioarea, res); + dev_dbg(&pdev->dev, "registers %p (%p)\n", + i2c->regs, res); /* setup info block for the i2c core */ i2c->adap.algo_data = i2c; i2c->adap.dev.parent = &pdev->dev; + i2c->pctrl = devm_pinctrl_get_select_default(i2c->dev); + + /* inititalise the i2c gpio lines */ + + if (i2c->pdata->cfg_gpio) { + i2c->pdata->cfg_gpio(to_platform_device(i2c->dev)); + } else if (IS_ERR(i2c->pctrl) && s3c24xx_i2c_parse_dt_gpio(i2c)) { + return -EINVAL; + } + /* initialise the i2c controller */ + clk_prepare_enable(i2c->clk); ret = s3c24xx_i2c_init(i2c); - if (ret != 0) - goto err_iomap; - + clk_disable_unprepare(i2c->clk); + if (ret != 0) { + dev_err(&pdev->dev, "I2C controller init failed\n"); + return ret; + } /* find the IRQ for this unit (note, this relies on the init call to * ensure no current IRQs pending */ @@ -1026,21 +1080,21 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) i2c->irq = ret = platform_get_irq(pdev, 0); if (ret <= 0) { dev_err(&pdev->dev, "cannot find IRQ\n"); - goto err_iomap; + return ret; } - ret = request_irq(i2c->irq, s3c24xx_i2c_irq, 0, - dev_name(&pdev->dev), i2c); + ret = devm_request_irq(&pdev->dev, i2c->irq, s3c24xx_i2c_irq, 0, + dev_name(&pdev->dev), i2c); if (ret != 0) { dev_err(&pdev->dev, "cannot claim IRQ %d\n", i2c->irq); - goto err_iomap; + return ret; } ret = s3c24xx_i2c_register_cpufreq(i2c); if (ret < 0) { dev_err(&pdev->dev, "failed to register cpufreq notifier\n"); - goto err_irq; + return ret; } /* Note, previous versions of the driver used i2c_add_adapter() @@ -1055,7 +1109,8 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) ret = i2c_add_numbered_adapter(&i2c->adap); if (ret < 0) { dev_err(&pdev->dev, "failed to add bus to i2c core\n"); - goto err_cpufreq; + s3c24xx_i2c_deregister_cpufreq(i2c); + return ret; } of_i2c_register_devices(&i2c->adap); @@ -1065,28 +1120,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev) pm_runtime_enable(&i2c->adap.dev); dev_info(&pdev->dev, "%s: S3C I2C adapter\n", dev_name(&i2c->adap.dev)); - clk_disable_unprepare(i2c->clk); return 0; - - err_cpufreq: - s3c24xx_i2c_deregister_cpufreq(i2c); - - err_irq: - free_irq(i2c->irq, i2c); - - err_iomap: - iounmap(i2c->regs); - - err_ioarea: - release_resource(i2c->ioarea); - kfree(i2c->ioarea); - - err_clk: - clk_disable_unprepare(i2c->clk); - clk_put(i2c->clk); - - err_noclk: - return ret; } /* s3c24xx_i2c_remove @@ -1104,21 +1138,16 @@ static int s3c24xx_i2c_remove(struct platform_device *pdev) s3c24xx_i2c_deregister_cpufreq(i2c); i2c_del_adapter(&i2c->adap); - free_irq(i2c->irq, i2c); clk_disable_unprepare(i2c->clk); - clk_put(i2c->clk); - iounmap(i2c->regs); - - release_resource(i2c->ioarea); - s3c24xx_i2c_dt_gpio_free(i2c); - kfree(i2c->ioarea); + if (pdev->dev.of_node && IS_ERR(i2c->pctrl)) + s3c24xx_i2c_dt_gpio_free(i2c); return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int s3c24xx_i2c_suspend_noirq(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -1141,10 +1170,14 @@ static int s3c24xx_i2c_resume(struct device *dev) return 0; } +#endif +#ifdef CONFIG_PM static const struct dev_pm_ops s3c24xx_i2c_dev_pm_ops = { +#ifdef CONFIG_PM_SLEEP .suspend_noirq = s3c24xx_i2c_suspend_noirq, .resume = s3c24xx_i2c_resume, +#endif }; #define S3C24XX_DEV_PM_OPS (&s3c24xx_i2c_dev_pm_ops) diff --git a/drivers/i2c/busses/i2c-s6000.c b/drivers/i2c/busses/i2c-s6000.c index b76a29d1f8e4..7c1ca5aca088 100644 --- a/drivers/i2c/busses/i2c-s6000.c +++ b/drivers/i2c/busses/i2c-s6000.c @@ -248,7 +248,7 @@ static struct i2c_algorithm s6i2c_algorithm = { .functionality = s6i2c_functionality, }; -static u16 __devinit nanoseconds_on_clk(struct s6i2c_if *iface, u32 ns) +static u16 nanoseconds_on_clk(struct s6i2c_if *iface, u32 ns) { u32 dividend = ((clk_get_rate(iface->clk) / 1000) * ns) / 1000000; if (dividend > 0xffff) @@ -256,7 +256,7 @@ static u16 __devinit nanoseconds_on_clk(struct s6i2c_if *iface, u32 ns) return dividend; } -static int __devinit s6i2c_probe(struct platform_device *dev) +static int s6i2c_probe(struct platform_device *dev) { struct s6i2c_if *iface = &s6i2c_if; struct i2c_adapter *p_adap; @@ -361,11 +361,10 @@ err_out: return rc; } -static int __devexit s6i2c_remove(struct platform_device *pdev) +static int s6i2c_remove(struct platform_device *pdev) { struct s6i2c_if *iface = platform_get_drvdata(pdev); i2c_wr16(iface, S6_I2C_ENABLE, 0); - platform_set_drvdata(pdev, NULL); i2c_del_adapter(&iface->adap); free_irq(iface->irq, iface); clk_disable(iface->clk); @@ -378,7 +377,7 @@ static int __devexit s6i2c_remove(struct platform_device *pdev) static struct platform_driver s6i2c_driver = { .probe = s6i2c_probe, - .remove = __devexit_p(s6i2c_remove), + .remove = s6i2c_remove, .driver = { .name = DRV_NAME, .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-scmi.c b/drivers/i2c/busses/i2c-scmi.c index 6aafa3d88ff0..c447e8d40b78 100644 --- a/drivers/i2c/busses/i2c-scmi.c +++ b/drivers/i2c/busses/i2c-scmi.c @@ -406,7 +406,7 @@ err: return -EIO; } -static int acpi_smbus_cmi_remove(struct acpi_device *device, int type) +static int acpi_smbus_cmi_remove(struct acpi_device *device) { struct acpi_smbus_cmi *smbus_cmi = acpi_driver_data(device); diff --git a/drivers/i2c/busses/i2c-sh7760.c b/drivers/i2c/busses/i2c-sh7760.c index c0c9dffbdb12..5351a2f34912 100644 --- a/drivers/i2c/busses/i2c-sh7760.c +++ b/drivers/i2c/busses/i2c-sh7760.c @@ -390,7 +390,7 @@ static const struct i2c_algorithm sh7760_i2c_algo = { * iclk = mclk/(CDF + 1). iclk must be < 20MHz. * scl = iclk/(SCGD*8 + 20). */ -static int __devinit calc_CCR(unsigned long scl_hz) +static int calc_CCR(unsigned long scl_hz) { struct clk *mclk; unsigned long mck, m1, dff, odff, iclk; @@ -430,7 +430,7 @@ static int __devinit calc_CCR(unsigned long scl_hz) return ((scgdm << 2) | cdfm); } -static int __devinit sh7760_i2c_probe(struct platform_device *pdev) +static int sh7760_i2c_probe(struct platform_device *pdev) { struct sh7760_i2c_platdata *pd; struct resource *res; @@ -536,7 +536,7 @@ out0: return ret; } -static int __devexit sh7760_i2c_remove(struct platform_device *pdev) +static int sh7760_i2c_remove(struct platform_device *pdev) { struct cami2c *id = platform_get_drvdata(pdev); @@ -546,7 +546,6 @@ static int __devexit sh7760_i2c_remove(struct platform_device *pdev) release_resource(id->ioarea); kfree(id->ioarea); kfree(id); - platform_set_drvdata(pdev, NULL); return 0; } @@ -557,7 +556,7 @@ static struct platform_driver sh7760_i2c_drv = { .owner = THIS_MODULE, }, .probe = sh7760_i2c_probe, - .remove = __devexit_p(sh7760_i2c_remove), + .remove = sh7760_i2c_remove, }; module_platform_driver(sh7760_i2c_drv); diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c index 8110ca45f342..debf745c0268 100644 --- a/drivers/i2c/busses/i2c-sh_mobile.c +++ b/drivers/i2c/busses/i2c-sh_mobile.c @@ -38,21 +38,21 @@ /* Transmit operation: */ /* */ /* 0 byte transmit */ -/* BUS: S A8 ACK P */ +/* BUS: S A8 ACK P(*) */ /* IRQ: DTE WAIT */ /* ICIC: */ /* ICCR: 0x94 0x90 */ /* ICDR: A8 */ /* */ /* 1 byte transmit */ -/* BUS: S A8 ACK D8(1) ACK P */ +/* BUS: S A8 ACK D8(1) ACK P(*) */ /* IRQ: DTE WAIT WAIT */ /* ICIC: -DTE */ /* ICCR: 0x94 0x90 */ /* ICDR: A8 D8(1) */ /* */ /* 2 byte transmit */ -/* BUS: S A8 ACK D8(1) ACK D8(2) ACK P */ +/* BUS: S A8 ACK D8(1) ACK D8(2) ACK P(*) */ /* IRQ: DTE WAIT WAIT WAIT */ /* ICIC: -DTE */ /* ICCR: 0x94 0x90 */ @@ -66,20 +66,20 @@ /* 0 byte receive - not supported since slave may hold SDA low */ /* */ /* 1 byte receive [TX] | [RX] */ -/* BUS: S A8 ACK | D8(1) ACK P */ +/* BUS: S A8 ACK | D8(1) ACK P(*) */ /* IRQ: DTE WAIT | WAIT DTE */ /* ICIC: -DTE | +DTE */ /* ICCR: 0x94 0x81 | 0xc0 */ /* ICDR: A8 | D8(1) */ /* */ /* 2 byte receive [TX]| [RX] */ -/* BUS: S A8 ACK | D8(1) ACK D8(2) ACK P */ +/* BUS: S A8 ACK | D8(1) ACK D8(2) ACK P(*) */ /* IRQ: DTE WAIT | WAIT WAIT DTE */ /* ICIC: -DTE | +DTE */ /* ICCR: 0x94 0x81 | 0xc0 */ /* ICDR: A8 | D8(1) D8(2) */ /* */ -/* 3 byte receive [TX] | [RX] */ +/* 3 byte receive [TX] | [RX] (*) */ /* BUS: S A8 ACK | D8(1) ACK D8(2) ACK D8(3) ACK P */ /* IRQ: DTE WAIT | WAIT WAIT WAIT DTE */ /* ICIC: -DTE | +DTE */ @@ -94,7 +94,7 @@ /* SDA ___\___XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXAAAAAAAAA___/ */ /* SCL \_/1\_/2\_/3\_/4\_/5\_/6\_/7\_/8\___/9\_____/ */ /* */ -/* S D7 D6 D5 D4 D3 D2 D1 D0 P */ +/* S D7 D6 D5 D4 D3 D2 D1 D0 P(*) */ /* ___ */ /* WAIT IRQ ________________________________/ \___________ */ /* TACK IRQ ____________________________________/ \_______ */ @@ -103,6 +103,11 @@ /* _______________________________________________ */ /* BUSY __/ \_ */ /* */ +/* (*) The STOP condition is only sent by the master at the end of the last */ +/* I2C message or if the I2C_M_STOP flag is set. Similarly, the BUSY bit is */ +/* only cleared after the STOP condition, so, between messages we have to */ +/* poll for the DTE bit. */ +/* */ enum sh_mobile_i2c_op { OP_START = 0, @@ -120,22 +125,25 @@ struct sh_mobile_i2c_data { void __iomem *reg; struct i2c_adapter adap; unsigned long bus_speed; + unsigned int clks_per_count; struct clk *clk; u_int8_t icic; - u_int8_t iccl; - u_int8_t icch; u_int8_t flags; + u_int16_t iccl; + u_int16_t icch; spinlock_t lock; wait_queue_head_t wait; struct i2c_msg *msg; int pos; int sr; + bool send_stop; }; #define IIC_FLAG_HAS_ICIC67 (1 << 0) -#define NORMAL_SPEED 100000 /* FAST_SPEED 400000 */ +#define STANDARD_MODE 100000 +#define FAST_MODE 400000 /* Register offsets */ #define ICDR 0x00 @@ -187,57 +195,90 @@ static void iic_set_clr(struct sh_mobile_i2c_data *pd, int offs, iic_wr(pd, offs, (iic_rd(pd, offs) | set) & ~clr); } -static void activate_ch(struct sh_mobile_i2c_data *pd) +static u32 sh_mobile_i2c_iccl(unsigned long count_khz, u32 tLOW, u32 tf, int offset) { - unsigned long i2c_clk; - u_int32_t num; - u_int32_t denom; - u_int32_t tmp; - - /* Wake up device and enable clock */ - pm_runtime_get_sync(pd->dev); - clk_enable(pd->clk); - - /* Get clock rate after clock is enabled */ - i2c_clk = clk_get_rate(pd->clk); + /* + * Conditional expression: + * ICCL >= COUNT_CLK * (tLOW + tf) + * + * SH-Mobile IIC hardware starts counting the LOW period of + * the SCL signal (tLOW) as soon as it pulls the SCL line. + * In order to meet the tLOW timing spec, we need to take into + * account the fall time of SCL signal (tf). Default tf value + * should be 0.3 us, for safety. + */ + return (((count_khz * (tLOW + tf)) + 5000) / 10000) + offset; +} - /* Calculate the value for iccl. From the data sheet: - * iccl = (p clock / transfer rate) * (L / (L + H)) - * where L and H are the SCL low/high ratio (5/4 in this case). - * We also round off the result. +static u32 sh_mobile_i2c_icch(unsigned long count_khz, u32 tHIGH, u32 tf, int offset) +{ + /* + * Conditional expression: + * ICCH >= COUNT_CLK * (tHIGH + tf) + * + * SH-Mobile IIC hardware is aware of SCL transition period 'tr', + * and can ignore it. SH-Mobile IIC controller starts counting + * the HIGH period of the SCL signal (tHIGH) after the SCL input + * voltage increases at VIH. + * + * Afterward it turned out calculating ICCH using only tHIGH spec + * will result in violation of the tHD;STA timing spec. We need + * to take into account the fall time of SDA signal (tf) at START + * condition, in order to meet both tHIGH and tHD;STA specs. */ - num = i2c_clk * 5; - denom = pd->bus_speed * 9; - tmp = num * 10 / denom; - if (tmp % 10 >= 5) - pd->iccl = (u_int8_t)((num/denom) + 1); - else - pd->iccl = (u_int8_t)(num/denom); + return (((count_khz * (tHIGH + tf)) + 5000) / 10000) + offset; +} - /* one more bit of ICCL in ICIC */ - if (pd->flags & IIC_FLAG_HAS_ICIC67) { - if ((num/denom) > 0xff) - pd->icic |= ICIC_ICCLB8; - else - pd->icic &= ~ICIC_ICCLB8; +static void sh_mobile_i2c_init(struct sh_mobile_i2c_data *pd) +{ + unsigned long i2c_clk_khz; + u32 tHIGH, tLOW, tf; + int offset; + + /* Get clock rate after clock is enabled */ + clk_enable(pd->clk); + i2c_clk_khz = clk_get_rate(pd->clk) / 1000; + i2c_clk_khz /= pd->clks_per_count; + + if (pd->bus_speed == STANDARD_MODE) { + tLOW = 47; /* tLOW = 4.7 us */ + tHIGH = 40; /* tHD;STA = tHIGH = 4.0 us */ + tf = 3; /* tf = 0.3 us */ + offset = 0; /* No offset */ + } else if (pd->bus_speed == FAST_MODE) { + tLOW = 13; /* tLOW = 1.3 us */ + tHIGH = 6; /* tHD;STA = tHIGH = 0.6 us */ + tf = 3; /* tf = 0.3 us */ + offset = 0; /* No offset */ + } else { + dev_err(pd->dev, "unrecognized bus speed %lu Hz\n", + pd->bus_speed); + goto out; } - /* Calculate the value for icch. From the data sheet: - icch = (p clock / transfer rate) * (H / (L + H)) */ - num = i2c_clk * 4; - tmp = num * 10 / denom; - if (tmp % 10 >= 5) - pd->icch = (u_int8_t)((num/denom) + 1); + pd->iccl = sh_mobile_i2c_iccl(i2c_clk_khz, tLOW, tf, offset); + /* one more bit of ICCL in ICIC */ + if ((pd->iccl > 0xff) && (pd->flags & IIC_FLAG_HAS_ICIC67)) + pd->icic |= ICIC_ICCLB8; else - pd->icch = (u_int8_t)(num/denom); + pd->icic &= ~ICIC_ICCLB8; + pd->icch = sh_mobile_i2c_icch(i2c_clk_khz, tHIGH, tf, offset); /* one more bit of ICCH in ICIC */ - if (pd->flags & IIC_FLAG_HAS_ICIC67) { - if ((num/denom) > 0xff) - pd->icic |= ICIC_ICCHB8; - else - pd->icic &= ~ICIC_ICCHB8; - } + if ((pd->icch > 0xff) && (pd->flags & IIC_FLAG_HAS_ICIC67)) + pd->icic |= ICIC_ICCHB8; + else + pd->icic &= ~ICIC_ICCHB8; + +out: + clk_disable(pd->clk); +} + +static void activate_ch(struct sh_mobile_i2c_data *pd) +{ + /* Wake up device and enable clock */ + pm_runtime_get_sync(pd->dev); + clk_enable(pd->clk); /* Enable channel and configure rx ack */ iic_set_clr(pd, ICCR, ICCR_ICE, 0); @@ -246,8 +287,8 @@ static void activate_ch(struct sh_mobile_i2c_data *pd) iic_wr(pd, ICIC, 0); /* Set the clock */ - iic_wr(pd, ICCL, pd->iccl); - iic_wr(pd, ICCH, pd->icch); + iic_wr(pd, ICCL, pd->iccl & 0xff); + iic_wr(pd, ICCH, pd->icch & 0xff); } static void deactivate_ch(struct sh_mobile_i2c_data *pd) @@ -287,7 +328,7 @@ static unsigned char i2c_op(struct sh_mobile_i2c_data *pd, break; case OP_TX_STOP: /* write data and issue a stop afterwards */ iic_wr(pd, ICDR, data); - iic_wr(pd, ICCR, 0x90); + iic_wr(pd, ICCR, pd->send_stop ? 0x90 : 0x94); break; case OP_TX_TO_RX: /* select read mode */ iic_wr(pd, ICCR, 0x81); @@ -314,20 +355,14 @@ static unsigned char i2c_op(struct sh_mobile_i2c_data *pd, return ret; } -static int sh_mobile_i2c_is_first_byte(struct sh_mobile_i2c_data *pd) +static bool sh_mobile_i2c_is_first_byte(struct sh_mobile_i2c_data *pd) { - if (pd->pos == -1) - return 1; - - return 0; + return pd->pos == -1; } -static int sh_mobile_i2c_is_last_byte(struct sh_mobile_i2c_data *pd) +static bool sh_mobile_i2c_is_last_byte(struct sh_mobile_i2c_data *pd) { - if (pd->pos == (pd->msg->len - 1)) - return 1; - - return 0; + return pd->pos == pd->msg->len - 1; } static void sh_mobile_i2c_get_data(struct sh_mobile_i2c_data *pd, @@ -434,25 +469,31 @@ static irqreturn_t sh_mobile_i2c_isr(int irq, void *dev_id) wake_up(&pd->wait); } + /* defeat write posting to avoid spurious WAIT interrupts */ + iic_rd(pd, ICSR); + return IRQ_HANDLED; } -static int start_ch(struct sh_mobile_i2c_data *pd, struct i2c_msg *usr_msg) +static int start_ch(struct sh_mobile_i2c_data *pd, struct i2c_msg *usr_msg, + bool do_init) { if (usr_msg->len == 0 && (usr_msg->flags & I2C_M_RD)) { dev_err(pd->dev, "Unsupported zero length i2c read\n"); return -EIO; } - /* Initialize channel registers */ - iic_set_clr(pd, ICCR, 0, ICCR_ICE); + if (do_init) { + /* Initialize channel registers */ + iic_set_clr(pd, ICCR, 0, ICCR_ICE); - /* Enable channel and configure rx ack */ - iic_set_clr(pd, ICCR, ICCR_ICE, 0); + /* Enable channel and configure rx ack */ + iic_set_clr(pd, ICCR, ICCR_ICE, 0); - /* Set the clock */ - iic_wr(pd, ICCL, pd->iccl); - iic_wr(pd, ICCH, pd->icch); + /* Set the clock */ + iic_wr(pd, ICCL, pd->iccl & 0xff); + iic_wr(pd, ICCH, pd->icch & 0xff); + } pd->msg = usr_msg; pd->pos = -1; @@ -463,6 +504,61 @@ static int start_ch(struct sh_mobile_i2c_data *pd, struct i2c_msg *usr_msg) return 0; } +static int poll_dte(struct sh_mobile_i2c_data *pd) +{ + int i; + + for (i = 1000; i; i--) { + u_int8_t val = iic_rd(pd, ICSR); + + if (val & ICSR_DTE) + break; + + if (val & ICSR_TACK) + return -EIO; + + udelay(10); + } + + if (!i) { + dev_warn(pd->dev, "Timeout polling for DTE!\n"); + return -ETIMEDOUT; + } + + return 0; +} + +static int poll_busy(struct sh_mobile_i2c_data *pd) +{ + int i; + + for (i = 1000; i; i--) { + u_int8_t val = iic_rd(pd, ICSR); + + dev_dbg(pd->dev, "val 0x%02x pd->sr 0x%02x\n", val, pd->sr); + + /* the interrupt handler may wake us up before the + * transfer is finished, so poll the hardware + * until we're done. + */ + if (!(val & ICSR_BUSY)) { + /* handle missing acknowledge and arbitration lost */ + if ((val | pd->sr) & (ICSR_TACK | ICSR_AL)) + return -EIO; + break; + } + + udelay(10); + } + + if (!i) { + dev_err(pd->dev, "Polling timed out\n"); + return -ETIMEDOUT; + } + + return 0; +} + static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num) @@ -470,53 +566,39 @@ static int sh_mobile_i2c_xfer(struct i2c_adapter *adapter, struct sh_mobile_i2c_data *pd = i2c_get_adapdata(adapter); struct i2c_msg *msg; int err = 0; - u_int8_t val; - int i, k, retry_count; + int i, k; activate_ch(pd); /* Process all messages */ for (i = 0; i < num; i++) { + bool do_start = pd->send_stop || !i; msg = &msgs[i]; + pd->send_stop = i == num - 1 || msg->flags & I2C_M_STOP; - err = start_ch(pd, msg); + err = start_ch(pd, msg, do_start); if (err) break; - i2c_op(pd, OP_START, 0); + if (do_start) + i2c_op(pd, OP_START, 0); /* The interrupt handler takes care of the rest... */ k = wait_event_timeout(pd->wait, pd->sr & (ICSR_TACK | SW_DONE), 5 * HZ); - if (!k) + if (!k) { dev_err(pd->dev, "Transfer request timed out\n"); - - retry_count = 1000; -again: - val = iic_rd(pd, ICSR); - - dev_dbg(pd->dev, "val 0x%02x pd->sr 0x%02x\n", val, pd->sr); - - /* the interrupt handler may wake us up before the - * transfer is finished, so poll the hardware - * until we're done. - */ - if (val & ICSR_BUSY) { - udelay(10); - if (retry_count--) - goto again; - - err = -EIO; - dev_err(pd->dev, "Polling timed out\n"); + err = -ETIMEDOUT; break; } - /* handle missing acknowledge and arbitration lost */ - if ((val | pd->sr) & (ICSR_TACK | ICSR_AL)) { - err = -EIO; + if (pd->send_stop) + err = poll_busy(pd); + else + err = poll_dte(pd); + if (err < 0) break; - } } deactivate_ch(pd); @@ -528,7 +610,7 @@ again: static u32 sh_mobile_i2c_func(struct i2c_adapter *adapter) { - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_PROTOCOL_MANGLING; } static struct i2c_algorithm sh_mobile_i2c_algorithm = { @@ -621,10 +703,13 @@ static int sh_mobile_i2c_probe(struct platform_device *dev) goto err_irq; } - /* Use platformd data bus speed or NORMAL_SPEED */ - pd->bus_speed = NORMAL_SPEED; + /* Use platform data bus speed or STANDARD_MODE */ + pd->bus_speed = STANDARD_MODE; if (pdata && pdata->bus_speed) pd->bus_speed = pdata->bus_speed; + pd->clks_per_count = 1; + if (pdata && pdata->clks_per_count) + pd->clks_per_count = pdata->clks_per_count; /* The IIC blocks on SH-Mobile ARM processors * come with two new bits in ICIC. @@ -632,6 +717,8 @@ static int sh_mobile_i2c_probe(struct platform_device *dev) if (size > 0x17) pd->flags |= IIC_FLAG_HAS_ICIC67; + sh_mobile_i2c_init(pd); + /* Enable Runtime PM for this device. * * Also tell the Runtime PM core to ignore children @@ -667,8 +754,9 @@ static int sh_mobile_i2c_probe(struct platform_device *dev) goto err_all; } - dev_info(&dev->dev, "I2C adapter %d with bus speed %lu Hz\n", - adap->nr, pd->bus_speed); + dev_info(&dev->dev, + "I2C adapter %d with bus speed %lu Hz (L/H=%x/%x)\n", + adap->nr, pd->bus_speed, pd->iccl, pd->icch); of_i2c_register_devices(adap); return 0; @@ -714,7 +802,7 @@ static const struct dev_pm_ops sh_mobile_i2c_dev_pm_ops = { .runtime_resume = sh_mobile_i2c_runtime_nop, }; -static const struct of_device_id sh_mobile_i2c_dt_ids[] __devinitconst = { +static const struct of_device_id sh_mobile_i2c_dt_ids[] = { { .compatible = "renesas,rmobile-iic", }, {}, }; diff --git a/drivers/i2c/busses/i2c-sirf.c b/drivers/i2c/busses/i2c-sirf.c index 5574a47792fb..5a7ad240bd26 100644 --- a/drivers/i2c/busses/i2c-sirf.c +++ b/drivers/i2c/busses/i2c-sirf.c @@ -12,6 +12,7 @@ #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/i2c.h> +#include <linux/of_i2c.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> @@ -258,7 +259,7 @@ static const struct i2c_algorithm i2c_sirfsoc_algo = { .functionality = i2c_sirfsoc_func, }; -static int __devinit i2c_sirfsoc_probe(struct platform_device *pdev) +static int i2c_sirfsoc_probe(struct platform_device *pdev) { struct sirfsoc_i2c *siic; struct i2c_adapter *adap; @@ -308,10 +309,9 @@ static int __devinit i2c_sirfsoc_probe(struct platform_device *pdev) goto out; } - siic->base = devm_request_and_ioremap(&pdev->dev, mem_res); - if (siic->base == NULL) { - dev_err(&pdev->dev, "IO remap failed!\n"); - err = -ENOMEM; + siic->base = devm_ioremap_resource(&pdev->dev, mem_res); + if (IS_ERR(siic->base)) { + err = PTR_ERR(siic->base); goto out; } @@ -328,6 +328,7 @@ static int __devinit i2c_sirfsoc_probe(struct platform_device *pdev) adap->algo = &i2c_sirfsoc_algo; adap->algo_data = siic; + adap->dev.of_node = pdev->dev.of_node; adap->dev.parent = &pdev->dev; adap->nr = pdev->id; @@ -371,6 +372,8 @@ static int __devinit i2c_sirfsoc_probe(struct platform_device *pdev) clk_disable(clk); + of_i2c_register_devices(adap); + dev_info(&pdev->dev, " I2C adapter ready to operate\n"); return 0; @@ -385,7 +388,7 @@ err_get_clk: return err; } -static int __devexit i2c_sirfsoc_remove(struct platform_device *pdev) +static int i2c_sirfsoc_remove(struct platform_device *pdev) { struct i2c_adapter *adapter = platform_get_drvdata(pdev); struct sirfsoc_i2c *siic = adapter->algo_data; @@ -433,7 +436,7 @@ static const struct dev_pm_ops i2c_sirfsoc_pm_ops = { }; #endif -static const struct of_device_id sirfsoc_i2c_of_match[] __devinitconst = { +static const struct of_device_id sirfsoc_i2c_of_match[] = { { .compatible = "sirf,prima2-i2c", }, {}, }; @@ -449,7 +452,7 @@ static struct platform_driver i2c_sirfsoc_driver = { .of_match_table = sirfsoc_i2c_of_match, }, .probe = i2c_sirfsoc_probe, - .remove = __devexit_p(i2c_sirfsoc_remove), + .remove = i2c_sirfsoc_remove, }; module_platform_driver(i2c_sirfsoc_driver); diff --git a/drivers/i2c/busses/i2c-sis5595.c b/drivers/i2c/busses/i2c-sis5595.c index 87e5126d449c..79fd96a04386 100644 --- a/drivers/i2c/busses/i2c-sis5595.c +++ b/drivers/i2c/busses/i2c-sis5595.c @@ -142,7 +142,7 @@ static void sis5595_write(u8 reg, u8 data) outb(data, sis5595_base + SMB_DAT); } -static int __devinit sis5595_setup(struct pci_dev *SIS5595_dev) +static int sis5595_setup(struct pci_dev *SIS5595_dev) { u16 a; u8 val; @@ -376,7 +376,7 @@ static DEFINE_PCI_DEVICE_TABLE(sis5595_ids) = { MODULE_DEVICE_TABLE (pci, sis5595_ids); -static int __devinit sis5595_probe(struct pci_dev *dev, const struct pci_device_id *id) +static int sis5595_probe(struct pci_dev *dev, const struct pci_device_id *id) { int err; diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c index 5d6723b7525e..36a9556d7cfa 100644 --- a/drivers/i2c/busses/i2c-sis630.c +++ b/drivers/i2c/busses/i2c-sis630.c @@ -17,30 +17,25 @@ */ /* - Changes: - 24.08.2002 - Fixed the typo in sis630_access (Thanks to Mark M. Hoffman) - Changed sis630_transaction.(Thanks to Mark M. Hoffman) - 18.09.2002 - Added SIS730 as supported. - 21.09.2002 - Added high_clock module option.If this option is set - used Host Master Clock 56KHz (default 14KHz).For now we save old Host - Master Clock and after transaction completed restore (otherwise - it's confuse BIOS and hung Machine). - 24.09.2002 - Fixed typo in sis630_access - Fixed logical error by restoring of Host Master Clock - 31.07.2003 - Added block data read/write support. -*/ - -/* Status: beta Supports: SIS 630 SIS 730 + SIS 964 + + Notable differences between chips: + +------------------------+--------------------+-------------------+ + | | SIS630/730 | SIS964 | + +------------------------+--------------------+-------------------+ + | Clock | 14kHz/56kHz | 55.56kHz/27.78kHz | + | SMBus registers offset | 0x80 | 0xE0 | + | SMB_CNT | Bit 1 = Slave Busy | Bit 1 = Bus probe | + | (not used yet) | Bit 3 is reserved | Bit 3 = Last byte | + | SMB_PCOUNT | Offset + 0x06 | Offset + 0x14 | + | SMB_COUNT | 4:0 bits | 5:0 bits | + +------------------------+--------------------+-------------------+ + (Other differences don't affect the functions provided by the driver) Note: we assume there can only be one device, with one SMBus interface. */ @@ -55,22 +50,36 @@ #include <linux/acpi.h> #include <linux/io.h> -/* SIS630 SMBus registers */ -#define SMB_STS 0x80 /* status */ -#define SMB_EN 0x81 /* status enable */ -#define SMB_CNT 0x82 -#define SMBHOST_CNT 0x83 -#define SMB_ADDR 0x84 -#define SMB_CMD 0x85 -#define SMB_PCOUNT 0x86 /* processed count */ -#define SMB_COUNT 0x87 -#define SMB_BYTE 0x88 /* ~0x8F data byte field */ -#define SMBDEV_ADDR 0x90 -#define SMB_DB0 0x91 -#define SMB_DB1 0x92 -#define SMB_SAA 0x93 - -/* register count for request_region */ +/* SIS964 id is defined here as we are the only file using it */ +#define PCI_DEVICE_ID_SI_964 0x0964 + +/* SIS630/730/964 SMBus registers */ +#define SMB_STS 0x00 /* status */ +#define SMB_CNT 0x02 /* control */ +#define SMBHOST_CNT 0x03 /* host control */ +#define SMB_ADDR 0x04 /* address */ +#define SMB_CMD 0x05 /* command */ +#define SMB_COUNT 0x07 /* byte count */ +#define SMB_BYTE 0x08 /* ~0x8F data byte field */ + +/* SMB_STS register */ +#define BYTE_DONE_STS 0x10 /* Byte Done Status / Block Array */ +#define SMBCOL_STS 0x04 /* Collision */ +#define SMBERR_STS 0x02 /* Device error */ + +/* SMB_CNT register */ +#define MSTO_EN 0x40 /* Host Master Timeout Enable */ +#define SMBCLK_SEL 0x20 /* Host master clock selection */ +#define SMB_PROBE 0x02 /* Bus Probe/Slave busy */ +#define SMB_HOSTBUSY 0x01 /* Host Busy */ + +/* SMBHOST_CNT register */ +#define SMB_KILL 0x20 /* Kill */ +#define SMB_START 0x10 /* Start */ + +/* register count for request_region + * As we don't use SMB_PCOUNT, 20 is ok for SiS630 and SiS964 + */ #define SIS630_SMB_IOREGION 20 /* PCI address constants */ @@ -96,65 +105,71 @@ static struct pci_driver sis630_driver; static bool high_clock; static bool force; module_param(high_clock, bool, 0); -MODULE_PARM_DESC(high_clock, "Set Host Master Clock to 56KHz (default 14KHz)."); +MODULE_PARM_DESC(high_clock, + "Set Host Master Clock to 56KHz (default 14KHz) (SIS630/730 only)."); module_param(force, bool, 0); MODULE_PARM_DESC(force, "Forcibly enable the SIS630. DANGEROUS!"); -/* acpi base address */ -static unsigned short acpi_base; +/* SMBus base adress */ +static unsigned short smbus_base; /* supported chips */ static int supported[] = { PCI_DEVICE_ID_SI_630, PCI_DEVICE_ID_SI_730, + PCI_DEVICE_ID_SI_760, 0 /* terminates the list */ }; static inline u8 sis630_read(u8 reg) { - return inb(acpi_base + reg); + return inb(smbus_base + reg); } static inline void sis630_write(u8 reg, u8 data) { - outb(data, acpi_base + reg); + outb(data, smbus_base + reg); } -static int sis630_transaction_start(struct i2c_adapter *adap, int size, u8 *oldclock) +static int sis630_transaction_start(struct i2c_adapter *adap, int size, + u8 *oldclock) { - int temp; + int temp; /* Make sure the SMBus host is ready to start transmitting. */ - if ((temp = sis630_read(SMB_CNT) & 0x03) != 0x00) { - dev_dbg(&adap->dev, "SMBus busy (%02x).Resetting...\n",temp); + temp = sis630_read(SMB_CNT); + if ((temp & (SMB_PROBE | SMB_HOSTBUSY)) != 0x00) { + dev_dbg(&adap->dev, "SMBus busy (%02x). Resetting...\n", temp); /* kill smbus transaction */ - sis630_write(SMBHOST_CNT, 0x20); + sis630_write(SMBHOST_CNT, SMB_KILL); - if ((temp = sis630_read(SMB_CNT) & 0x03) != 0x00) { + temp = sis630_read(SMB_CNT); + if (temp & (SMB_PROBE | SMB_HOSTBUSY)) { dev_dbg(&adap->dev, "Failed! (%02x)\n", temp); return -EBUSY; - } else { + } else { dev_dbg(&adap->dev, "Successful!\n"); } - } + } /* save old clock, so we can prevent machine for hung */ *oldclock = sis630_read(SMB_CNT); dev_dbg(&adap->dev, "saved clock 0x%02x\n", *oldclock); - /* disable timeout interrupt , set Host Master Clock to 56KHz if requested */ + /* disable timeout interrupt, + * set Host Master Clock to 56KHz if requested */ if (high_clock) - sis630_write(SMB_CNT, 0x20); + sis630_write(SMB_CNT, SMBCLK_SEL); else - sis630_write(SMB_CNT, (*oldclock & ~0x40)); + sis630_write(SMB_CNT, (*oldclock & ~MSTO_EN)); /* clear all sticky bits */ temp = sis630_read(SMB_STS); sis630_write(SMB_STS, temp & 0x1e); /* start the transaction by setting bit 4 and size */ - sis630_write(SMBHOST_CNT,0x10 | (size & 0x07)); + sis630_write(SMBHOST_CNT, SMB_START | (size & 0x07)); return 0; } @@ -168,7 +183,7 @@ static int sis630_transaction_wait(struct i2c_adapter *adap, int size) msleep(1); temp = sis630_read(SMB_STS); /* check if block transmitted */ - if (size == SIS630_BLOCK_DATA && (temp & 0x10)) + if (size == SIS630_BLOCK_DATA && (temp & BYTE_DONE_STS)) break; } while (!(temp & 0x0e) && (timeout++ < MAX_TIMEOUT)); @@ -178,19 +193,14 @@ static int sis630_transaction_wait(struct i2c_adapter *adap, int size) result = -ETIMEDOUT; } - if (temp & 0x02) { + if (temp & SMBERR_STS) { dev_dbg(&adap->dev, "Error: Failed bus transaction\n"); result = -ENXIO; } - if (temp & 0x04) { + if (temp & SMBCOL_STS) { dev_err(&adap->dev, "Bus collision!\n"); - result = -EIO; - /* - TBD: Datasheet say: - the software should clear this bit and restart SMBUS operation. - Should we do it or user start request again? - */ + result = -EAGAIN; } return result; @@ -198,21 +208,21 @@ static int sis630_transaction_wait(struct i2c_adapter *adap, int size) static void sis630_transaction_end(struct i2c_adapter *adap, u8 oldclock) { - int temp = 0; - /* clear all status "sticky" bits */ - sis630_write(SMB_STS, temp); + sis630_write(SMB_STS, 0xFF); - dev_dbg(&adap->dev, "SMB_CNT before clock restore 0x%02x\n", sis630_read(SMB_CNT)); + dev_dbg(&adap->dev, + "SMB_CNT before clock restore 0x%02x\n", sis630_read(SMB_CNT)); /* * restore old Host Master Clock if high_clock is set * and oldclock was not 56KHz */ - if (high_clock && !(oldclock & 0x20)) - sis630_write(SMB_CNT,(sis630_read(SMB_CNT) & ~0x20)); + if (high_clock && !(oldclock & SMBCLK_SEL)) + sis630_write(SMB_CNT, sis630_read(SMB_CNT) & ~SMBCLK_SEL); - dev_dbg(&adap->dev, "SMB_CNT after clock restore 0x%02x\n", sis630_read(SMB_CNT)); + dev_dbg(&adap->dev, + "SMB_CNT after clock restore 0x%02x\n", sis630_read(SMB_CNT)); } static int sis630_transaction(struct i2c_adapter *adap, int size) @@ -229,7 +239,8 @@ static int sis630_transaction(struct i2c_adapter *adap, int size) return result; } -static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *data, int read_write) +static int sis630_block_data(struct i2c_adapter *adap, + union i2c_smbus_data *data, int read_write) { int i, len = 0, rc = 0; u8 oldclock = 0; @@ -241,39 +252,43 @@ static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *dat else if (len > 32) len = 32; sis630_write(SMB_COUNT, len); - for (i=1; i <= len; i++) { - dev_dbg(&adap->dev, "set data 0x%02x\n", data->block[i]); + for (i = 1; i <= len; i++) { + dev_dbg(&adap->dev, + "set data 0x%02x\n", data->block[i]); /* set data */ - sis630_write(SMB_BYTE+(i-1)%8, data->block[i]); - if (i==8 || (len<8 && i==len)) { - dev_dbg(&adap->dev, "start trans len=%d i=%d\n",len ,i); + sis630_write(SMB_BYTE + (i - 1) % 8, data->block[i]); + if (i == 8 || (len < 8 && i == len)) { + dev_dbg(&adap->dev, + "start trans len=%d i=%d\n", len, i); /* first transaction */ rc = sis630_transaction_start(adap, SIS630_BLOCK_DATA, &oldclock); if (rc) return rc; - } - else if ((i-1)%8 == 7 || i==len) { - dev_dbg(&adap->dev, "trans_wait len=%d i=%d\n",len,i); - if (i>8) { - dev_dbg(&adap->dev, "clear smbary_sts len=%d i=%d\n",len,i); + } else if ((i - 1) % 8 == 7 || i == len) { + dev_dbg(&adap->dev, + "trans_wait len=%d i=%d\n", len, i); + if (i > 8) { + dev_dbg(&adap->dev, + "clear smbary_sts" + " len=%d i=%d\n", len, i); /* If this is not first transaction, we must clear sticky bit. clear SMBARY_STS */ - sis630_write(SMB_STS,0x10); + sis630_write(SMB_STS, BYTE_DONE_STS); } rc = sis630_transaction_wait(adap, SIS630_BLOCK_DATA); if (rc) { - dev_dbg(&adap->dev, "trans_wait failed\n"); + dev_dbg(&adap->dev, + "trans_wait failed\n"); break; } } } - } - else { + } else { /* read request */ data->block[0] = len = 0; rc = sis630_transaction_start(adap, @@ -294,18 +309,22 @@ static int sis630_block_data(struct i2c_adapter *adap, union i2c_smbus_data *dat if (data->block[0] > 32) data->block[0] = 32; - dev_dbg(&adap->dev, "block data read len=0x%x\n", data->block[0]); + dev_dbg(&adap->dev, + "block data read len=0x%x\n", data->block[0]); - for (i=0; i < 8 && len < data->block[0]; i++,len++) { - dev_dbg(&adap->dev, "read i=%d len=%d\n", i, len); - data->block[len+1] = sis630_read(SMB_BYTE+i); + for (i = 0; i < 8 && len < data->block[0]; i++, len++) { + dev_dbg(&adap->dev, + "read i=%d len=%d\n", i, len); + data->block[len + 1] = sis630_read(SMB_BYTE + + i); } - dev_dbg(&adap->dev, "clear smbary_sts len=%d i=%d\n",len,i); + dev_dbg(&adap->dev, + "clear smbary_sts len=%d i=%d\n", len, i); /* clear SMBARY_STS */ - sis630_write(SMB_STS,0x10); - } while(len < data->block[0]); + sis630_write(SMB_STS, BYTE_DONE_STS); + } while (len < data->block[0]); } sis630_transaction_end(adap, oldclock); @@ -321,42 +340,47 @@ static s32 sis630_access(struct i2c_adapter *adap, u16 addr, int status; switch (size) { - case I2C_SMBUS_QUICK: - sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); - size = SIS630_QUICK; - break; - case I2C_SMBUS_BYTE: - sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); - if (read_write == I2C_SMBUS_WRITE) - sis630_write(SMB_CMD, command); - size = SIS630_BYTE; - break; - case I2C_SMBUS_BYTE_DATA: - sis630_write(SMB_ADDR, ((addr & 0x7f) << 1) | (read_write & 0x01)); - sis630_write(SMB_CMD, command); - if (read_write == I2C_SMBUS_WRITE) - sis630_write(SMB_BYTE, data->byte); - size = SIS630_BYTE_DATA; - break; - case I2C_SMBUS_PROC_CALL: - case I2C_SMBUS_WORD_DATA: - sis630_write(SMB_ADDR,((addr & 0x7f) << 1) | (read_write & 0x01)); + case I2C_SMBUS_QUICK: + sis630_write(SMB_ADDR, + ((addr & 0x7f) << 1) | (read_write & 0x01)); + size = SIS630_QUICK; + break; + case I2C_SMBUS_BYTE: + sis630_write(SMB_ADDR, + ((addr & 0x7f) << 1) | (read_write & 0x01)); + if (read_write == I2C_SMBUS_WRITE) sis630_write(SMB_CMD, command); - if (read_write == I2C_SMBUS_WRITE) { - sis630_write(SMB_BYTE, data->word & 0xff); - sis630_write(SMB_BYTE + 1,(data->word & 0xff00) >> 8); - } - size = (size == I2C_SMBUS_PROC_CALL ? SIS630_PCALL : SIS630_WORD_DATA); - break; - case I2C_SMBUS_BLOCK_DATA: - sis630_write(SMB_ADDR,((addr & 0x7f) << 1) | (read_write & 0x01)); - sis630_write(SMB_CMD, command); - size = SIS630_BLOCK_DATA; - return sis630_block_data(adap, data, read_write); - default: - dev_warn(&adap->dev, "Unsupported transaction %d\n", - size); - return -EOPNOTSUPP; + size = SIS630_BYTE; + break; + case I2C_SMBUS_BYTE_DATA: + sis630_write(SMB_ADDR, + ((addr & 0x7f) << 1) | (read_write & 0x01)); + sis630_write(SMB_CMD, command); + if (read_write == I2C_SMBUS_WRITE) + sis630_write(SMB_BYTE, data->byte); + size = SIS630_BYTE_DATA; + break; + case I2C_SMBUS_PROC_CALL: + case I2C_SMBUS_WORD_DATA: + sis630_write(SMB_ADDR, + ((addr & 0x7f) << 1) | (read_write & 0x01)); + sis630_write(SMB_CMD, command); + if (read_write == I2C_SMBUS_WRITE) { + sis630_write(SMB_BYTE, data->word & 0xff); + sis630_write(SMB_BYTE + 1, (data->word & 0xff00) >> 8); + } + size = (size == I2C_SMBUS_PROC_CALL ? + SIS630_PCALL : SIS630_WORD_DATA); + break; + case I2C_SMBUS_BLOCK_DATA: + sis630_write(SMB_ADDR, + ((addr & 0x7f) << 1) | (read_write & 0x01)); + sis630_write(SMB_CMD, command); + size = SIS630_BLOCK_DATA; + return sis630_block_data(adap, data, read_write); + default: + dev_warn(&adap->dev, "Unsupported transaction %d\n", size); + return -EOPNOTSUPP; } status = sis630_transaction(adap, size); @@ -368,15 +392,16 @@ static s32 sis630_access(struct i2c_adapter *adap, u16 addr, return 0; } - switch(size) { - case SIS630_BYTE: - case SIS630_BYTE_DATA: - data->byte = sis630_read(SMB_BYTE); - break; - case SIS630_PCALL: - case SIS630_WORD_DATA: - data->word = sis630_read(SMB_BYTE) + (sis630_read(SMB_BYTE + 1) << 8); - break; + switch (size) { + case SIS630_BYTE: + case SIS630_BYTE_DATA: + data->byte = sis630_read(SMB_BYTE); + break; + case SIS630_PCALL: + case SIS630_WORD_DATA: + data->word = sis630_read(SMB_BYTE) + + (sis630_read(SMB_BYTE + 1) << 8); + break; } return 0; @@ -384,31 +409,33 @@ static s32 sis630_access(struct i2c_adapter *adap, u16 addr, static u32 sis630_func(struct i2c_adapter *adapter) { - return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA | - I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_PROC_CALL | - I2C_FUNC_SMBUS_BLOCK_DATA; + return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | + I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | + I2C_FUNC_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_DATA; } -static int __devinit sis630_setup(struct pci_dev *sis630_dev) +static int sis630_setup(struct pci_dev *sis630_dev) { unsigned char b; struct pci_dev *dummy = NULL; int retval, i; + /* acpi base address */ + unsigned short acpi_base; /* check for supported SiS devices */ - for (i=0; supported[i] > 0 ; i++) { - if ((dummy = pci_get_device(PCI_VENDOR_ID_SI, supported[i], dummy))) + for (i = 0; supported[i] > 0; i++) { + dummy = pci_get_device(PCI_VENDOR_ID_SI, supported[i], dummy); + if (dummy) break; /* found */ } if (dummy) { pci_dev_put(dummy); - } - else if (force) { - dev_err(&sis630_dev->dev, "WARNING: Can't detect SIS630 compatible device, but " + } else if (force) { + dev_err(&sis630_dev->dev, + "WARNING: Can't detect SIS630 compatible device, but " "loading because of force option enabled\n"); - } - else { + } else { return -ENODEV; } @@ -416,7 +443,7 @@ static int __devinit sis630_setup(struct pci_dev *sis630_dev) Enable ACPI first , so we can accsess reg 74-75 in acpi io space and read acpi base addr */ - if (pci_read_config_byte(sis630_dev, SIS630_BIOS_CTL_REG,&b)) { + if (pci_read_config_byte(sis630_dev, SIS630_BIOS_CTL_REG, &b)) { dev_err(&sis630_dev->dev, "Error: Can't read bios ctl reg\n"); retval = -ENODEV; goto exit; @@ -430,24 +457,35 @@ static int __devinit sis630_setup(struct pci_dev *sis630_dev) } /* Determine the ACPI base address */ - if (pci_read_config_word(sis630_dev,SIS630_ACPI_BASE_REG,&acpi_base)) { - dev_err(&sis630_dev->dev, "Error: Can't determine ACPI base address\n"); + if (pci_read_config_word(sis630_dev, + SIS630_ACPI_BASE_REG, &acpi_base)) { + dev_err(&sis630_dev->dev, + "Error: Can't determine ACPI base address\n"); retval = -ENODEV; goto exit; } - dev_dbg(&sis630_dev->dev, "ACPI base at 0x%04x\n", acpi_base); + dev_dbg(&sis630_dev->dev, "ACPI base at 0x%04hx\n", acpi_base); + + if (supported[i] == PCI_DEVICE_ID_SI_760) + smbus_base = acpi_base + 0xE0; + else + smbus_base = acpi_base + 0x80; + + dev_dbg(&sis630_dev->dev, "SMBus base at 0x%04hx\n", smbus_base); - retval = acpi_check_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION, + retval = acpi_check_region(smbus_base + SMB_STS, SIS630_SMB_IOREGION, sis630_driver.name); if (retval) goto exit; /* Everything is happy, let's grab the memory and set things up. */ - if (!request_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION, + if (!request_region(smbus_base + SMB_STS, SIS630_SMB_IOREGION, sis630_driver.name)) { - dev_err(&sis630_dev->dev, "SMBus registers 0x%04x-0x%04x already " - "in use!\n", acpi_base + SMB_STS, acpi_base + SMB_SAA); + dev_err(&sis630_dev->dev, + "I/O Region 0x%04hx-0x%04hx for SMBus already in use.\n", + smbus_base + SMB_STS, + smbus_base + SMB_STS + SIS630_SMB_IOREGION - 1); retval = -EBUSY; goto exit; } @@ -456,7 +494,7 @@ static int __devinit sis630_setup(struct pci_dev *sis630_dev) exit: if (retval) - acpi_base = 0; + smbus_base = 0; return retval; } @@ -470,20 +508,24 @@ static struct i2c_adapter sis630_adapter = { .owner = THIS_MODULE, .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, .algo = &smbus_algorithm, + .retries = 3 }; static DEFINE_PCI_DEVICE_TABLE(sis630_ids) = { { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_LPC) }, + { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_964) }, { 0, } }; -MODULE_DEVICE_TABLE (pci, sis630_ids); +MODULE_DEVICE_TABLE(pci, sis630_ids); -static int __devinit sis630_probe(struct pci_dev *dev, const struct pci_device_id *id) +static int sis630_probe(struct pci_dev *dev, const struct pci_device_id *id) { if (sis630_setup(dev)) { - dev_err(&dev->dev, "SIS630 comp. bus not detected, module not inserted.\n"); + dev_err(&dev->dev, + "SIS630 compatible bus not detected, " + "module not inserted.\n"); return -ENODEV; } @@ -491,17 +533,17 @@ static int __devinit sis630_probe(struct pci_dev *dev, const struct pci_device_i sis630_adapter.dev.parent = &dev->dev; snprintf(sis630_adapter.name, sizeof(sis630_adapter.name), - "SMBus SIS630 adapter at %04x", acpi_base + SMB_STS); + "SMBus SIS630 adapter at %04hx", smbus_base + SMB_STS); return i2c_add_adapter(&sis630_adapter); } -static void __devexit sis630_remove(struct pci_dev *dev) +static void sis630_remove(struct pci_dev *dev) { - if (acpi_base) { + if (smbus_base) { i2c_del_adapter(&sis630_adapter); - release_region(acpi_base + SMB_STS, SIS630_SMB_IOREGION); - acpi_base = 0; + release_region(smbus_base + SMB_STS, SIS630_SMB_IOREGION); + smbus_base = 0; } } @@ -510,7 +552,7 @@ static struct pci_driver sis630_driver = { .name = "sis630_smbus", .id_table = sis630_ids, .probe = sis630_probe, - .remove = __devexit_p(sis630_remove), + .remove = sis630_remove, }; module_pci_driver(sis630_driver); diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c index 7b72614a9bc0..b9faf9b6002b 100644 --- a/drivers/i2c/busses/i2c-sis96x.c +++ b/drivers/i2c/busses/i2c-sis96x.c @@ -252,7 +252,7 @@ static DEFINE_PCI_DEVICE_TABLE(sis96x_ids) = { MODULE_DEVICE_TABLE (pci, sis96x_ids); -static int __devinit sis96x_probe(struct pci_dev *dev, +static int sis96x_probe(struct pci_dev *dev, const struct pci_device_id *id) { u16 ww = 0; @@ -308,7 +308,7 @@ static int __devinit sis96x_probe(struct pci_dev *dev, return retval; } -static void __devexit sis96x_remove(struct pci_dev *dev) +static void sis96x_remove(struct pci_dev *dev) { if (sis96x_smbus_base) { i2c_del_adapter(&sis96x_adapter); @@ -321,7 +321,7 @@ static struct pci_driver sis96x_driver = { .name = "sis96x_smbus", .id_table = sis96x_ids, .probe = sis96x_probe, - .remove = __devexit_p(sis96x_remove), + .remove = sis96x_remove, }; module_pci_driver(sis96x_driver); diff --git a/drivers/i2c/busses/i2c-stu300.c b/drivers/i2c/busses/i2c-stu300.c index 580a0c04cb42..0a6f941133f6 100644 --- a/drivers/i2c/busses/i2c-stu300.c +++ b/drivers/i2c/busses/i2c-stu300.c @@ -888,11 +888,11 @@ stu300_probe(struct platform_device *pdev) if (!res) return -ENOENT; - dev->virtbase = devm_request_and_ioremap(&pdev->dev, res); + dev->virtbase = devm_ioremap_resource(&pdev->dev, res); dev_dbg(&pdev->dev, "initialize bus device I2C%d on virtual " "base %p\n", bus_nr, dev->virtbase); - if (!dev->virtbase) - return -ENOMEM; + if (IS_ERR(dev->virtbase)) + return PTR_ERR(dev->virtbase); dev->irq = platform_get_irq(pdev, 0); ret = devm_request_irq(&pdev->dev, dev->irq, stu300_irh, 0, NAME, dev); @@ -975,7 +975,6 @@ stu300_remove(struct platform_device *pdev) i2c_del_adapter(&dev->adapter); /* Turn off everything */ stu300_wr8(0x00, dev->virtbase + I2C_CR); - platform_set_drvdata(pdev, NULL); return 0; } diff --git a/drivers/i2c/busses/i2c-taos-evm.c b/drivers/i2c/busses/i2c-taos-evm.c index 26c352a09298..6ffa56e08517 100644 --- a/drivers/i2c/busses/i2c-taos-evm.c +++ b/drivers/i2c/busses/i2c-taos-evm.c @@ -271,7 +271,6 @@ static int taos_connect(struct serio *serio, struct serio_driver *drv) exit_close: serio_close(serio); exit_kfree: - serio_set_drvdata(serio, NULL); kfree(taos); exit: return err; @@ -285,7 +284,6 @@ static void taos_disconnect(struct serio *serio) i2c_unregister_device(taos->client); i2c_del_adapter(&taos->adapter); serio_close(serio); - serio_set_drvdata(serio, NULL); kfree(taos); dev_info(&serio->dev, "Disconnected from TAOS EVM\n"); diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index dcea77bf6f50..36704e3ab3fa 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -29,11 +29,10 @@ #include <linux/of_i2c.h> #include <linux/of_device.h> #include <linux/module.h> +#include <linux/clk/tegra.h> #include <asm/unaligned.h> -#include <mach/clk.h> - #define TEGRA_I2C_TIMEOUT (msecs_to_jiffies(1000)) #define BYTES_PER_FIFO_WORD 4 @@ -71,6 +70,8 @@ #define I2C_INT_TX_FIFO_DATA_REQ (1<<1) #define I2C_INT_RX_FIFO_DATA_REQ (1<<0) #define I2C_CLK_DIVISOR 0x06c +#define I2C_CLK_DIVISOR_STD_FAST_MODE_SHIFT 16 +#define I2C_CLK_MULTIPLIER_STD_FAST_MODE 8 #define DVC_CTRL_REG1 0x000 #define DVC_CTRL_REG1_INTR_EN (1<<10) @@ -117,10 +118,23 @@ enum msg_end_type { /** * struct tegra_i2c_hw_feature : Different HW support on Tegra * @has_continue_xfer_support: Continue transfer supports. + * @has_per_pkt_xfer_complete_irq: Has enable/disable capability for transfer + * complete interrupt per packet basis. + * @has_single_clk_source: The i2c controller has single clock source. Tegra30 + * and earlier Socs has two clock sources i.e. div-clk and + * fast-clk. + * @clk_divisor_hs_mode: Clock divisor in HS mode. + * @clk_divisor_std_fast_mode: Clock divisor in standard/fast mode. It is + * applicable if there is no fast clock source i.e. single clock + * source. */ struct tegra_i2c_hw_feature { bool has_continue_xfer_support; + bool has_per_pkt_xfer_complete_irq; + bool has_single_clk_source; + int clk_divisor_hs_mode; + int clk_divisor_std_fast_mode; }; /** @@ -366,11 +380,13 @@ static void tegra_dvc_init(struct tegra_i2c_dev *i2c_dev) static inline int tegra_i2c_clock_enable(struct tegra_i2c_dev *i2c_dev) { int ret; - ret = clk_prepare_enable(i2c_dev->fast_clk); - if (ret < 0) { - dev_err(i2c_dev->dev, - "Enabling fast clk failed, err %d\n", ret); - return ret; + if (!i2c_dev->hw->has_single_clk_source) { + ret = clk_prepare_enable(i2c_dev->fast_clk); + if (ret < 0) { + dev_err(i2c_dev->dev, + "Enabling fast clk failed, err %d\n", ret); + return ret; + } } ret = clk_prepare_enable(i2c_dev->div_clk); if (ret < 0) { @@ -384,13 +400,16 @@ static inline int tegra_i2c_clock_enable(struct tegra_i2c_dev *i2c_dev) static inline void tegra_i2c_clock_disable(struct tegra_i2c_dev *i2c_dev) { clk_disable_unprepare(i2c_dev->div_clk); - clk_disable_unprepare(i2c_dev->fast_clk); + if (!i2c_dev->hw->has_single_clk_source) + clk_disable_unprepare(i2c_dev->fast_clk); } static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev) { u32 val; int err = 0; + int clk_multiplier = I2C_CLK_MULTIPLIER_STD_FAST_MODE; + u32 clk_divisor; tegra_i2c_clock_enable(i2c_dev); @@ -405,7 +424,15 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev) (0x2 << I2C_CNFG_DEBOUNCE_CNT_SHIFT); i2c_writel(i2c_dev, val, I2C_CNFG); i2c_writel(i2c_dev, 0, I2C_INT_MASK); - clk_set_rate(i2c_dev->div_clk, i2c_dev->bus_clk_rate * 8); + + clk_multiplier *= (i2c_dev->hw->clk_divisor_std_fast_mode + 1); + clk_set_rate(i2c_dev->div_clk, i2c_dev->bus_clk_rate * clk_multiplier); + + /* Make sure clock divisor programmed correctly */ + clk_divisor = i2c_dev->hw->clk_divisor_hs_mode; + clk_divisor |= i2c_dev->hw->clk_divisor_std_fast_mode << + I2C_CLK_DIVISOR_STD_FAST_MODE_SHIFT; + i2c_writel(i2c_dev, clk_divisor, I2C_CLK_DIVISOR); if (!i2c_dev->is_dvc) { u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG); @@ -547,6 +574,8 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, tegra_i2c_fill_tx_fifo(i2c_dev); int_mask = I2C_INT_NO_ACK | I2C_INT_ARBITRATION_LOST; + if (i2c_dev->hw->has_per_pkt_xfer_complete_irq) + int_mask |= I2C_INT_PACKET_XFER_COMPLETE; if (msg->flags & I2C_M_RD) int_mask |= I2C_INT_RX_FIFO_DATA_REQ; else if (i2c_dev->msg_buf_remaining) @@ -558,7 +587,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, ret = wait_for_completion_timeout(&i2c_dev->msg_complete, TEGRA_I2C_TIMEOUT); tegra_i2c_mask_irq(i2c_dev, int_mask); - if (WARN_ON(ret == 0)) { + if (ret == 0) { dev_err(i2c_dev->dev, "i2c transfer timed out\n"); tegra_i2c_init(i2c_dev); @@ -634,15 +663,32 @@ static const struct i2c_algorithm tegra_i2c_algo = { static const struct tegra_i2c_hw_feature tegra20_i2c_hw = { .has_continue_xfer_support = false, + .has_per_pkt_xfer_complete_irq = false, + .has_single_clk_source = false, + .clk_divisor_hs_mode = 3, + .clk_divisor_std_fast_mode = 0, }; static const struct tegra_i2c_hw_feature tegra30_i2c_hw = { .has_continue_xfer_support = true, + .has_per_pkt_xfer_complete_irq = false, + .has_single_clk_source = false, + .clk_divisor_hs_mode = 3, + .clk_divisor_std_fast_mode = 0, +}; + +static const struct tegra_i2c_hw_feature tegra114_i2c_hw = { + .has_continue_xfer_support = true, + .has_per_pkt_xfer_complete_irq = true, + .has_single_clk_source = true, + .clk_divisor_hs_mode = 1, + .clk_divisor_std_fast_mode = 0x19, }; #if defined(CONFIG_OF) /* Match table for of_platform binding */ -static const struct of_device_id tegra_i2c_of_match[] __devinitconst = { +static const struct of_device_id tegra_i2c_of_match[] = { + { .compatible = "nvidia,tegra114-i2c", .data = &tegra114_i2c_hw, }, { .compatible = "nvidia,tegra30-i2c", .data = &tegra30_i2c_hw, }, { .compatible = "nvidia,tegra20-i2c", .data = &tegra20_i2c_hw, }, { .compatible = "nvidia,tegra20-i2c-dvc", .data = &tegra20_i2c_hw, }, @@ -651,7 +697,7 @@ static const struct of_device_id tegra_i2c_of_match[] __devinitconst = { MODULE_DEVICE_TABLE(of, tegra_i2c_of_match); #endif -static int __devinit tegra_i2c_probe(struct platform_device *pdev) +static int tegra_i2c_probe(struct platform_device *pdev) { struct tegra_i2c_dev *i2c_dev; struct tegra_i2c_platform_data *pdata = pdev->dev.platform_data; @@ -669,11 +715,9 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev) return -EINVAL; } - base = devm_request_and_ioremap(&pdev->dev, res); - if (!base) { - dev_err(&pdev->dev, "Cannot request/ioremap I2C registers\n"); - return -EADDRNOTAVAIL; - } + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res) { @@ -688,12 +732,6 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev) return PTR_ERR(div_clk); } - fast_clk = devm_clk_get(&pdev->dev, "fast-clk"); - if (IS_ERR(fast_clk)) { - dev_err(&pdev->dev, "missing bus clock"); - return PTR_ERR(fast_clk); - } - i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL); if (!i2c_dev) { dev_err(&pdev->dev, "Could not allocate struct tegra_i2c_dev"); @@ -702,7 +740,6 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev) i2c_dev->base = base; i2c_dev->div_clk = div_clk; - i2c_dev->fast_clk = fast_clk; i2c_dev->adapter.algo = &tegra_i2c_algo; i2c_dev->irq = irq; i2c_dev->cont_id = pdev->id; @@ -733,6 +770,15 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev) } init_completion(&i2c_dev->msg_complete); + if (!i2c_dev->hw->has_single_clk_source) { + fast_clk = devm_clk_get(&pdev->dev, "fast-clk"); + if (IS_ERR(fast_clk)) { + dev_err(&pdev->dev, "missing fast clock"); + return PTR_ERR(fast_clk); + } + i2c_dev->fast_clk = fast_clk; + } + platform_set_drvdata(pdev, i2c_dev); ret = tegra_i2c_init(i2c_dev); @@ -769,7 +815,7 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev) return 0; } -static int __devexit tegra_i2c_remove(struct platform_device *pdev) +static int tegra_i2c_remove(struct platform_device *pdev) { struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev); i2c_del_adapter(&i2c_dev->adapter); @@ -817,7 +863,7 @@ static SIMPLE_DEV_PM_OPS(tegra_i2c_pm, tegra_i2c_suspend, tegra_i2c_resume); static struct platform_driver tegra_i2c_driver = { .probe = tegra_i2c_probe, - .remove = __devexit_p(tegra_i2c_remove), + .remove = tegra_i2c_remove, .driver = { .name = "tegra-i2c", .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/i2c-versatile.c b/drivers/i2c/busses/i2c-versatile.c index eec20db6246f..f3a8790a07e8 100644 --- a/drivers/i2c/busses/i2c-versatile.c +++ b/drivers/i2c/busses/i2c-versatile.c @@ -125,8 +125,6 @@ static int i2c_versatile_remove(struct platform_device *dev) { struct i2c_versatile *i2c = platform_get_drvdata(dev); - platform_set_drvdata(dev, NULL); - i2c_del_adapter(&i2c->adap); return 0; } diff --git a/drivers/i2c/busses/i2c-via.c b/drivers/i2c/busses/i2c-via.c index 7ffee71ca190..be662511c58b 100644 --- a/drivers/i2c/busses/i2c-via.c +++ b/drivers/i2c/busses/i2c-via.c @@ -96,7 +96,7 @@ static DEFINE_PCI_DEVICE_TABLE(vt586b_ids) = { MODULE_DEVICE_TABLE (pci, vt586b_ids); -static int __devinit vt586b_probe(struct pci_dev *dev, const struct pci_device_id *id) +static int vt586b_probe(struct pci_dev *dev, const struct pci_device_id *id) { u16 base; u8 rev; @@ -146,7 +146,7 @@ static int __devinit vt586b_probe(struct pci_dev *dev, const struct pci_device_i return 0; } -static void __devexit vt586b_remove(struct pci_dev *dev) +static void vt586b_remove(struct pci_dev *dev) { i2c_del_adapter(&vt586b_adapter); release_region(I2C_DIR, IOSPACE); @@ -158,7 +158,7 @@ static struct pci_driver vt586b_driver = { .name = "vt586b_smbus", .id_table = vt586b_ids, .probe = vt586b_probe, - .remove = __devexit_p(vt586b_remove), + .remove = vt586b_remove, }; module_pci_driver(vt586b_driver); diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c index 271c9a2b0fd7..b2d90e105f41 100644 --- a/drivers/i2c/busses/i2c-viapro.c +++ b/drivers/i2c/busses/i2c-viapro.c @@ -320,8 +320,8 @@ static struct i2c_adapter vt596_adapter = { .algo = &smbus_algorithm, }; -static int __devinit vt596_probe(struct pci_dev *pdev, - const struct pci_device_id *id) +static int vt596_probe(struct pci_dev *pdev, + const struct pci_device_id *id) { unsigned char temp; int error; diff --git a/drivers/i2c/busses/i2c-viperboard.c b/drivers/i2c/busses/i2c-viperboard.c new file mode 100644 index 000000000000..f45c32c1ace6 --- /dev/null +++ b/drivers/i2c/busses/i2c-viperboard.c @@ -0,0 +1,480 @@ +/* + * Nano River Technologies viperboard i2c master driver + * + * (C) 2012 by Lemonage GmbH + * Author: Lars Poeschel <poeschel@lemonage.de> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/mutex.h> +#include <linux/platform_device.h> + +#include <linux/usb.h> +#include <linux/i2c.h> + +#include <linux/mfd/viperboard.h> + +struct vprbrd_i2c { + struct i2c_adapter i2c; + u8 bus_freq_param; +}; + +/* i2c bus frequency module parameter */ +static u8 i2c_bus_param; +static unsigned int i2c_bus_freq = 100; +module_param(i2c_bus_freq, int, 0); +MODULE_PARM_DESC(i2c_bus_freq, + "i2c bus frequency in khz (default is 100) valid values: 10, 100, 200, 400, 1000, 3000, 6000"); + +static int vprbrd_i2c_status(struct i2c_adapter *i2c, + struct vprbrd_i2c_status *status, bool prev_error) +{ + u16 bytes_xfer; + int ret; + struct vprbrd *vb = (struct vprbrd *)i2c->algo_data; + + /* check for protocol error */ + bytes_xfer = sizeof(struct vprbrd_i2c_status); + + ret = usb_control_msg(vb->usb_dev, usb_rcvctrlpipe(vb->usb_dev, 0), + VPRBRD_USB_REQUEST_I2C, VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, + status, bytes_xfer, VPRBRD_USB_TIMEOUT_MS); + + if (ret != bytes_xfer) + prev_error = true; + + if (prev_error) { + dev_err(&i2c->dev, "failure in usb communication\n"); + return -EREMOTEIO; + } + + dev_dbg(&i2c->dev, " status = %d\n", status->status); + if (status->status != 0x00) { + dev_err(&i2c->dev, "failure: i2c protocol error\n"); + return -EPROTO; + } + return 0; +} + +static int vprbrd_i2c_receive(struct usb_device *usb_dev, + struct vprbrd_i2c_read_msg *rmsg, int bytes_xfer) +{ + int ret, bytes_actual; + int error = 0; + + /* send the read request */ + ret = usb_bulk_msg(usb_dev, + usb_sndbulkpipe(usb_dev, VPRBRD_EP_OUT), rmsg, + sizeof(struct vprbrd_i2c_read_hdr), &bytes_actual, + VPRBRD_USB_TIMEOUT_MS); + + if ((ret < 0) + || (bytes_actual != sizeof(struct vprbrd_i2c_read_hdr))) { + dev_err(&usb_dev->dev, "failure transmitting usb\n"); + error = -EREMOTEIO; + } + + /* read the actual data */ + ret = usb_bulk_msg(usb_dev, + usb_rcvbulkpipe(usb_dev, VPRBRD_EP_IN), rmsg, + bytes_xfer, &bytes_actual, VPRBRD_USB_TIMEOUT_MS); + + if ((ret < 0) || (bytes_xfer != bytes_actual)) { + dev_err(&usb_dev->dev, "failure receiving usb\n"); + error = -EREMOTEIO; + } + return error; +} + +static int vprbrd_i2c_addr(struct usb_device *usb_dev, + struct vprbrd_i2c_addr_msg *amsg) +{ + int ret, bytes_actual; + + ret = usb_bulk_msg(usb_dev, + usb_sndbulkpipe(usb_dev, VPRBRD_EP_OUT), amsg, + sizeof(struct vprbrd_i2c_addr_msg), &bytes_actual, + VPRBRD_USB_TIMEOUT_MS); + + if ((ret < 0) || + (sizeof(struct vprbrd_i2c_addr_msg) != bytes_actual)) { + dev_err(&usb_dev->dev, "failure transmitting usb\n"); + return -EREMOTEIO; + } + return 0; +} + +static int vprbrd_i2c_read(struct vprbrd *vb, struct i2c_msg *msg) +{ + int ret; + u16 remain_len, bytes_xfer, len1, len2, + start = 0x0000; + struct vprbrd_i2c_read_msg *rmsg = + (struct vprbrd_i2c_read_msg *)vb->buf; + + remain_len = msg->len; + rmsg->header.cmd = VPRBRD_I2C_CMD_READ; + while (remain_len > 0) { + rmsg->header.addr = cpu_to_le16(start + 0x4000); + if (remain_len <= 255) { + len1 = remain_len; + len2 = 0x00; + rmsg->header.len0 = remain_len; + rmsg->header.len1 = 0x00; + rmsg->header.len2 = 0x00; + rmsg->header.len3 = 0x00; + rmsg->header.len4 = 0x00; + rmsg->header.len5 = 0x00; + remain_len = 0; + } else if (remain_len <= 510) { + len1 = remain_len; + len2 = 0x00; + rmsg->header.len0 = remain_len - 255; + rmsg->header.len1 = 0xff; + rmsg->header.len2 = 0x00; + rmsg->header.len3 = 0x00; + rmsg->header.len4 = 0x00; + rmsg->header.len5 = 0x00; + remain_len = 0; + } else if (remain_len <= 512) { + len1 = remain_len; + len2 = 0x00; + rmsg->header.len0 = remain_len - 510; + rmsg->header.len1 = 0xff; + rmsg->header.len2 = 0xff; + rmsg->header.len3 = 0x00; + rmsg->header.len4 = 0x00; + rmsg->header.len5 = 0x00; + remain_len = 0; + } else if (remain_len <= 767) { + len1 = 512; + len2 = remain_len - 512; + rmsg->header.len0 = 0x02; + rmsg->header.len1 = 0xff; + rmsg->header.len2 = 0xff; + rmsg->header.len3 = remain_len - 512; + rmsg->header.len4 = 0x00; + rmsg->header.len5 = 0x00; + bytes_xfer = remain_len; + remain_len = 0; + } else if (remain_len <= 1022) { + len1 = 512; + len2 = remain_len - 512; + rmsg->header.len0 = 0x02; + rmsg->header.len1 = 0xff; + rmsg->header.len2 = 0xff; + rmsg->header.len3 = remain_len - 767; + rmsg->header.len4 = 0xff; + rmsg->header.len5 = 0x00; + remain_len = 0; + } else if (remain_len <= 1024) { + len1 = 512; + len2 = remain_len - 512; + rmsg->header.len0 = 0x02; + rmsg->header.len1 = 0xff; + rmsg->header.len2 = 0xff; + rmsg->header.len3 = remain_len - 1022; + rmsg->header.len4 = 0xff; + rmsg->header.len5 = 0xff; + remain_len = 0; + } else { + len1 = 512; + len2 = 512; + rmsg->header.len0 = 0x02; + rmsg->header.len1 = 0xff; + rmsg->header.len2 = 0xff; + rmsg->header.len3 = 0x02; + rmsg->header.len4 = 0xff; + rmsg->header.len5 = 0xff; + remain_len -= 1024; + start += 1024; + } + rmsg->header.tf1 = cpu_to_le16(len1); + rmsg->header.tf2 = cpu_to_le16(len2); + + /* first read transfer */ + ret = vprbrd_i2c_receive(vb->usb_dev, rmsg, len1); + if (ret < 0) + return ret; + /* copy the received data */ + memcpy(msg->buf + start, rmsg, len1); + + /* second read transfer if neccessary */ + if (len2 > 0) { + ret = vprbrd_i2c_receive(vb->usb_dev, rmsg, len2); + if (ret < 0) + return ret; + /* copy the received data */ + memcpy(msg->buf + start + 512, rmsg, len2); + } + } + return 0; +} + +static int vprbrd_i2c_write(struct vprbrd *vb, struct i2c_msg *msg) +{ + int ret, bytes_actual; + u16 remain_len, bytes_xfer, + start = 0x0000; + struct vprbrd_i2c_write_msg *wmsg = + (struct vprbrd_i2c_write_msg *)vb->buf; + + remain_len = msg->len; + wmsg->header.cmd = VPRBRD_I2C_CMD_WRITE; + wmsg->header.last = 0x00; + wmsg->header.chan = 0x00; + wmsg->header.spi = 0x0000; + while (remain_len > 0) { + wmsg->header.addr = cpu_to_le16(start + 0x4000); + if (remain_len > 503) { + wmsg->header.len1 = 0xff; + wmsg->header.len2 = 0xf8; + remain_len -= 503; + bytes_xfer = 503 + sizeof(struct vprbrd_i2c_write_hdr); + start += 503; + } else if (remain_len > 255) { + wmsg->header.len1 = 0xff; + wmsg->header.len2 = (remain_len - 255); + bytes_xfer = remain_len + + sizeof(struct vprbrd_i2c_write_hdr); + remain_len = 0; + } else { + wmsg->header.len1 = remain_len; + wmsg->header.len2 = 0x00; + bytes_xfer = remain_len + + sizeof(struct vprbrd_i2c_write_hdr); + remain_len = 0; + } + memcpy(wmsg->data, msg->buf + start, + bytes_xfer - sizeof(struct vprbrd_i2c_write_hdr)); + + ret = usb_bulk_msg(vb->usb_dev, + usb_sndbulkpipe(vb->usb_dev, + VPRBRD_EP_OUT), wmsg, + bytes_xfer, &bytes_actual, VPRBRD_USB_TIMEOUT_MS); + if ((ret < 0) || (bytes_xfer != bytes_actual)) + return -EREMOTEIO; + } + return 0; +} + +static int vprbrd_i2c_xfer(struct i2c_adapter *i2c, struct i2c_msg *msgs, + int num) +{ + struct i2c_msg *pmsg; + int i, ret, + error = 0; + struct vprbrd *vb = (struct vprbrd *)i2c->algo_data; + struct vprbrd_i2c_addr_msg *amsg = + (struct vprbrd_i2c_addr_msg *)vb->buf; + struct vprbrd_i2c_status *smsg = (struct vprbrd_i2c_status *)vb->buf; + + dev_dbg(&i2c->dev, "master xfer %d messages:\n", num); + + for (i = 0 ; i < num ; i++) { + pmsg = &msgs[i]; + + dev_dbg(&i2c->dev, + " %d: %s (flags %d) %d bytes to 0x%02x\n", + i, pmsg->flags & I2C_M_RD ? "read" : "write", + pmsg->flags, pmsg->len, pmsg->addr); + + /* msgs longer than 2048 bytes are not supported by adapter */ + if (pmsg->len > 2048) + return -EINVAL; + + mutex_lock(&vb->lock); + /* directly send the message */ + if (pmsg->flags & I2C_M_RD) { + /* read data */ + amsg->cmd = VPRBRD_I2C_CMD_ADDR; + amsg->unknown2 = 0x00; + amsg->unknown3 = 0x00; + amsg->addr = pmsg->addr; + amsg->unknown1 = 0x01; + amsg->len = cpu_to_le16(pmsg->len); + /* send the addr and len, we're interested to board */ + ret = vprbrd_i2c_addr(vb->usb_dev, amsg); + if (ret < 0) + error = ret; + + ret = vprbrd_i2c_read(vb, pmsg); + if (ret < 0) + error = ret; + + ret = vprbrd_i2c_status(i2c, smsg, error); + if (ret < 0) + error = ret; + /* in case of protocol error, return the error */ + if (error < 0) + goto error; + } else { + /* write data */ + ret = vprbrd_i2c_write(vb, pmsg); + + amsg->cmd = VPRBRD_I2C_CMD_ADDR; + amsg->unknown2 = 0x00; + amsg->unknown3 = 0x00; + amsg->addr = pmsg->addr; + amsg->unknown1 = 0x00; + amsg->len = cpu_to_le16(pmsg->len); + /* send the addr, the data goes to to board */ + ret = vprbrd_i2c_addr(vb->usb_dev, amsg); + if (ret < 0) + error = ret; + + ret = vprbrd_i2c_status(i2c, smsg, error); + if (ret < 0) + error = ret; + + if (error < 0) + goto error; + } + mutex_unlock(&vb->lock); + } + return 0; +error: + mutex_unlock(&vb->lock); + return error; +} + +static u32 vprbrd_i2c_func(struct i2c_adapter *i2c) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +/* This is the actual algorithm we define */ +static const struct i2c_algorithm vprbrd_algorithm = { + .master_xfer = vprbrd_i2c_xfer, + .functionality = vprbrd_i2c_func, +}; + +static int vprbrd_i2c_probe(struct platform_device *pdev) +{ + struct vprbrd *vb = dev_get_drvdata(pdev->dev.parent); + struct vprbrd_i2c *vb_i2c; + int ret; + int pipe; + + vb_i2c = kzalloc(sizeof(*vb_i2c), GFP_KERNEL); + if (vb_i2c == NULL) + return -ENOMEM; + + /* setup i2c adapter description */ + vb_i2c->i2c.owner = THIS_MODULE; + vb_i2c->i2c.class = I2C_CLASS_HWMON; + vb_i2c->i2c.algo = &vprbrd_algorithm; + vb_i2c->i2c.algo_data = vb; + /* save the param in usb capabable memory */ + vb_i2c->bus_freq_param = i2c_bus_param; + + snprintf(vb_i2c->i2c.name, sizeof(vb_i2c->i2c.name), + "viperboard at bus %03d device %03d", + vb->usb_dev->bus->busnum, vb->usb_dev->devnum); + + /* setting the bus frequency */ + if ((i2c_bus_param <= VPRBRD_I2C_FREQ_10KHZ) + && (i2c_bus_param >= VPRBRD_I2C_FREQ_6MHZ)) { + pipe = usb_sndctrlpipe(vb->usb_dev, 0); + ret = usb_control_msg(vb->usb_dev, pipe, + VPRBRD_USB_REQUEST_I2C_FREQ, VPRBRD_USB_TYPE_OUT, + 0x0000, 0x0000, &vb_i2c->bus_freq_param, 1, + VPRBRD_USB_TIMEOUT_MS); + if (ret != 1) { + dev_err(&pdev->dev, + "failure setting i2c_bus_freq to %d\n", i2c_bus_freq); + ret = -EIO; + goto error; + } + } else { + dev_err(&pdev->dev, + "invalid i2c_bus_freq setting:%d\n", i2c_bus_freq); + ret = -EIO; + goto error; + } + + vb_i2c->i2c.dev.parent = &pdev->dev; + + /* attach to i2c layer */ + i2c_add_adapter(&vb_i2c->i2c); + + platform_set_drvdata(pdev, vb_i2c); + + return 0; + +error: + kfree(vb_i2c); + return ret; +} + +static int vprbrd_i2c_remove(struct platform_device *pdev) +{ + struct vprbrd_i2c *vb_i2c = platform_get_drvdata(pdev); + int ret; + + ret = i2c_del_adapter(&vb_i2c->i2c); + + return ret; +} + +static struct platform_driver vprbrd_i2c_driver = { + .driver.name = "viperboard-i2c", + .driver.owner = THIS_MODULE, + .probe = vprbrd_i2c_probe, + .remove = vprbrd_i2c_remove, +}; + +static int __init vprbrd_i2c_init(void) +{ + switch (i2c_bus_freq) { + case 6000: + i2c_bus_param = VPRBRD_I2C_FREQ_6MHZ; + break; + case 3000: + i2c_bus_param = VPRBRD_I2C_FREQ_3MHZ; + break; + case 1000: + i2c_bus_param = VPRBRD_I2C_FREQ_1MHZ; + break; + case 400: + i2c_bus_param = VPRBRD_I2C_FREQ_400KHZ; + break; + case 200: + i2c_bus_param = VPRBRD_I2C_FREQ_200KHZ; + break; + case 100: + i2c_bus_param = VPRBRD_I2C_FREQ_100KHZ; + break; + case 10: + i2c_bus_param = VPRBRD_I2C_FREQ_10KHZ; + break; + default: + pr_warn("invalid i2c_bus_freq (%d)\n", i2c_bus_freq); + i2c_bus_param = VPRBRD_I2C_FREQ_100KHZ; + } + + return platform_driver_register(&vprbrd_i2c_driver); +} +subsys_initcall(vprbrd_i2c_init); + +static void __exit vprbrd_i2c_exit(void) +{ + platform_driver_unregister(&vprbrd_i2c_driver); +} +module_exit(vprbrd_i2c_exit); + +MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>"); +MODULE_DESCRIPTION("I2C master driver for Nano River Techs Viperboard"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:viperboard-i2c"); diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c index 641d0e5e3303..332c720fb3fe 100644 --- a/drivers/i2c/busses/i2c-xiic.c +++ b/drivers/i2c/busses/i2c-xiic.c @@ -689,7 +689,7 @@ static struct i2c_adapter xiic_adapter = { }; -static int __devinit xiic_i2c_probe(struct platform_device *pdev) +static int xiic_i2c_probe(struct platform_device *pdev) { struct xiic_i2c *i2c; struct xiic_i2c_platform_data *pdata; @@ -774,7 +774,7 @@ resource_missing: return -ENOENT; } -static int __devexit xiic_i2c_remove(struct platform_device* pdev) +static int xiic_i2c_remove(struct platform_device *pdev) { struct xiic_i2c *i2c = platform_get_drvdata(pdev); struct resource *res; @@ -784,8 +784,6 @@ static int __devexit xiic_i2c_remove(struct platform_device* pdev) xiic_deinit(i2c); - platform_set_drvdata(pdev, NULL); - free_irq(platform_get_irq(pdev, 0), i2c); iounmap(i2c->base); @@ -800,7 +798,7 @@ static int __devexit xiic_i2c_remove(struct platform_device* pdev) } #if defined(CONFIG_OF) -static const struct of_device_id xiic_of_match[] __devinitconst = { +static const struct of_device_id xiic_of_match[] = { { .compatible = "xlnx,xps-iic-2.00.a", }, {}, }; @@ -809,7 +807,7 @@ MODULE_DEVICE_TABLE(of, xiic_of_match); static struct platform_driver xiic_i2c_driver = { .probe = xiic_i2c_probe, - .remove = __devexit_p(xiic_i2c_remove), + .remove = xiic_i2c_remove, .driver = { .owner = THIS_MODULE, .name = DRIVER_NAME, diff --git a/drivers/i2c/busses/i2c-xlr.c b/drivers/i2c/busses/i2c-xlr.c index 96d3fabd8883..7945b05d3ea0 100644 --- a/drivers/i2c/busses/i2c-xlr.c +++ b/drivers/i2c/busses/i2c-xlr.c @@ -7,6 +7,7 @@ * warranty of any kind, whether express or implied. */ +#include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> @@ -214,7 +215,7 @@ static struct i2c_algorithm xlr_i2c_algo = { .functionality = xlr_func, }; -static int __devinit xlr_i2c_probe(struct platform_device *pdev) +static int xlr_i2c_probe(struct platform_device *pdev) { struct xlr_i2c_private *priv; struct resource *res; @@ -225,11 +226,9 @@ static int __devinit xlr_i2c_probe(struct platform_device *pdev) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - priv->iobase = devm_request_and_ioremap(&pdev->dev, res); - if (!priv->iobase) { - dev_err(&pdev->dev, "devm_request_and_ioremap failed\n"); - return -EBUSY; - } + priv->iobase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->iobase)) + return PTR_ERR(priv->iobase); priv->adap.dev.parent = &pdev->dev; priv->adap.owner = THIS_MODULE; @@ -251,19 +250,18 @@ static int __devinit xlr_i2c_probe(struct platform_device *pdev) return 0; } -static int __devexit xlr_i2c_remove(struct platform_device *pdev) +static int xlr_i2c_remove(struct platform_device *pdev) { struct xlr_i2c_private *priv; priv = platform_get_drvdata(pdev); i2c_del_adapter(&priv->adap); - platform_set_drvdata(pdev, NULL); return 0; } static struct platform_driver xlr_i2c_driver = { .probe = xlr_i2c_probe, - .remove = __devexit_p(xlr_i2c_remove), + .remove = xlr_i2c_remove, .driver = { .name = "xlr-i2cbus", .owner = THIS_MODULE, diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c index 08aab57337dd..2d1d2c5653fb 100644 --- a/drivers/i2c/busses/scx200_acb.c +++ b/drivers/i2c/busses/scx200_acb.c @@ -389,7 +389,7 @@ static const struct i2c_algorithm scx200_acb_algorithm = { static struct scx200_acb_iface *scx200_acb_list; static DEFINE_MUTEX(scx200_acb_list_mutex); -static __devinit int scx200_acb_probe(struct scx200_acb_iface *iface) +static int scx200_acb_probe(struct scx200_acb_iface *iface) { u8 val; @@ -424,7 +424,7 @@ static __devinit int scx200_acb_probe(struct scx200_acb_iface *iface) return 0; } -static __devinit struct scx200_acb_iface *scx200_create_iface(const char *text, +static struct scx200_acb_iface *scx200_create_iface(const char *text, struct device *dev, int index) { struct scx200_acb_iface *iface; @@ -449,7 +449,7 @@ static __devinit struct scx200_acb_iface *scx200_create_iface(const char *text, return iface; } -static int __devinit scx200_acb_create(struct scx200_acb_iface *iface) +static int scx200_acb_create(struct scx200_acb_iface *iface) { struct i2c_adapter *adapter; int rc; @@ -480,7 +480,7 @@ static int __devinit scx200_acb_create(struct scx200_acb_iface *iface) return 0; } -static struct scx200_acb_iface * __devinit scx200_create_dev(const char *text, +static struct scx200_acb_iface *scx200_create_dev(const char *text, unsigned long base, int index, struct device *dev) { struct scx200_acb_iface *iface; @@ -508,7 +508,7 @@ static struct scx200_acb_iface * __devinit scx200_create_dev(const char *text, return NULL; } -static int __devinit scx200_probe(struct platform_device *pdev) +static int scx200_probe(struct platform_device *pdev) { struct scx200_acb_iface *iface; struct resource *res; @@ -530,19 +530,18 @@ static int __devinit scx200_probe(struct platform_device *pdev) return 0; } -static void __devexit scx200_cleanup_iface(struct scx200_acb_iface *iface) +static void scx200_cleanup_iface(struct scx200_acb_iface *iface) { i2c_del_adapter(&iface->adapter); release_region(iface->base, 8); kfree(iface); } -static int __devexit scx200_remove(struct platform_device *pdev) +static int scx200_remove(struct platform_device *pdev) { struct scx200_acb_iface *iface; iface = platform_get_drvdata(pdev); - platform_set_drvdata(pdev, NULL); scx200_cleanup_iface(iface); return 0; @@ -554,7 +553,7 @@ static struct platform_driver scx200_pci_driver = { .owner = THIS_MODULE, }, .probe = scx200_probe, - .remove = __devexit_p(scx200_remove), + .remove = scx200_remove, }; static DEFINE_PCI_DEVICE_TABLE(scx200_isa) = { |