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2014-05-08image: add support for Android's boot image formatSebastian Siewior
This patch adds support for the Android boot-image format. The header file is from the Android project and got slightly alterted so the struct + its defines are not generic but have something like a namespace. The header file is from bootloader/legacy/include/boot/bootimg.h. The header parsing has been written from scratch and I looked at bootloader/legacy/usbloader/usbloader.c for some details. The image contains the physical address (load address) of the kernel and ramdisk. This address is considered only for the kernel image. The "second image" defined in the image header is currently not supported. I haven't found anything that is creating this. v3 (Rob Herring): This is based on http://patchwork.ozlabs.org/patch/126797/ with the following changes: - Rebased to current mainline - Moved android image handling to separate functions in common/image-android.c - s/u8/char/ in header to fix string function warnings - Use SPDX identifiers for licenses - Cleaned-up file source information: android_image.h is from file include/boot/bootimg.h in repository: https://android.googlesource.com/platform/bootable/bootloader/legacy The git commit hash is 4205b865141ff2e255fe1d3bd16de18e217ef06a usbloader.c would be from the same commit, but it does not appear to have been used for any actual code. v4: - s/andriod/android/ - Use a separate flag ep_found to track if the entry point has been set rather than using a magic value. Cc: Wolfgang Denk <wd@denx.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Tom Rini <trini@ti.com> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
2014-05-08ums: allow the user to specify the device typeStephen Warren
Allow an optional devtype parameter to the ums command, which specifies the type of the device to be exported. This could allow exporting a SATA or even another USB device. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08ums: move all variable declarations to the start of the blockStephen Warren
It's easier to assign values to the variables inside an if statement body if the assignment and declaration are separate. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08ums: use get_device() not find_mmc_device();Stephen Warren
get_device() is a generic routine that will support any type of block device. Use this instead of the type-specific find_mmc_device(), for future flexibility. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08ums: move IO support code to common locationStephen Warren
There's nothing Samsung-/board-specfic about the implementation of ums_init(). Move the code into cmd_usb_mass_storage.c, so that it can be shared by any user of that command. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08ums: remove ums_disk_init()Stephen Warren
Now that ums_disk_init() is so simple, there's no need for it to be a separate function. Instead, just add it to the tail end of ums_init(). Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08ums: remove error-checking of MMC device sizeStephen Warren
There's no reason to believe that an MMC device will incorrectly report its capacity. Remove error checking of this value from ums_disk_init() to simplify it. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08ums: remove UMS_{NUM,START}_SECTORS + UMS_START_SECTORStephen Warren
These values aren't set anywhere at present, and hence have no effect. The concept of a single global offset/number of sectors to expose through USB Mass Storage doesn't even make sense in the face of multiple storage devices. Remove these defines to simplify the code. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08ums: support block devices not MMC devicesStephen Warren
The USB Mass Storage function could equally well support a SATA device as support an MMC device. Update struct ums to contain a block device descriptor, not an MMC device descriptor. Cc: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
2014-05-08usb: ums: add error handling for failed registrationStephen Warren
Without this, if g_dnl_register() fails, the UMS code continues on blindly and crashes. This fix makes it simply print an error message instead. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-05-07usb: ums: remove ci_udc special caseStephen Warren
Now that the ci_udc driver supports allocating multiple requests per endpoint, we can revert the special-case added by a022c1e13c01 "usb: ums: use only 1 buffer for CI_UDC". Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-05-07usb: ci_udc: allow multiple buffer allocs per epStephen Warren
Modify ci_ep_alloc_request() to return a dynamically allocated request object, rather than a singleton that's part of the endpoint. This requires moving various state from the endpoint structure to the request structure, since we need one copy per request. The "fast bounce buffer" b_fast is removed by this change rather than moved to the request object. Instead, we enhance the bounce buffer logic in ci_bounce()/ci_debounce() to keep the bounce buffer around between request submissions. This avoids the need to allocate an arbitrarily- sized bounce buffer up-front, yet avoids incurring the allocation overhead each time a request is submitted. A future enhancement would be to actually submit multiple requests to HW at once. The Linux driver shows that this is possible. That might improve throughput (depending on the USB protocol in use), since USB could be performing a transfer to one HW buffer in parallel with whatever SW actions U-Boot performs on another buffer. However, I have not made this change as part of this patch, in order to keep SW changes related to buffer management separate from any change in the way the HW is programmed. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-05-06Merge branch 'serial' of git://www.denx.de/git/u-boot-microblazeTom Rini
2014-05-06Merge branch 'master' of git://www.denx.de/git/u-boot-microblazeTom Rini
2014-05-06Merge branch 'net' of git://www.denx.de/git/u-boot-microblazeTom Rini
2014-05-06Merge branch 'master' of git://git.denx.de/u-boot-usbTom Rini
2014-05-06serial: zynq: Fix typo in suffix function nameMichal Simek
's/zynq_serial_initalize/zynq_serial_initialize/g' serial_initialize is used by all serial drivers. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2014-05-06serial: zynq: Remove sparse warningsMichal Simek
Warnings: drivers/serial/serial_zynq.c:181:1: warning: symbol 'uart_zynq0_init' was not declared. Should it be static? drivers/serial/serial_zynq.c:181:1: warning: symbol 'uart_zynq0_setbrg' was not declared. Should it be static? drivers/serial/serial_zynq.c:181:1: warning: symbol 'uart_zynq0_getc' was not declared. Should it be static? drivers/serial/serial_zynq.c:181:1: warning: symbol 'uart_zynq0_tstc' was not declared. Should it be static? drivers/serial/serial_zynq.c:181:1: warning: symbol 'uart_zynq0_putc' was not declared. Should it be static? drivers/serial/serial_zynq.c:181:1: warning: symbol 'uart_zynq0_puts' was not declared. Should it be static? drivers/serial/serial_zynq.c:182:22: warning: symbol 'uart_zynq_serial0_device' was not declared. Should it be static? drivers/serial/serial_zynq.c:184:1: warning: symbol 'uart_zynq1_init' was not declared. Should it be static? drivers/serial/serial_zynq.c:184:1: warning: symbol 'uart_zynq1_setbrg' was not declared. Should it be static? drivers/serial/serial_zynq.c:184:1: warning: symbol 'uart_zynq1_getc' was not declared. Should it be static? drivers/serial/serial_zynq.c:184:1: warning: symbol 'uart_zynq1_tstc' was not declared. Should it be static? drivers/serial/serial_zynq.c:184:1: warning: symbol 'uart_zynq1_putc' was not declared. Should it be static? drivers/serial/serial_zynq.c:184:1: warning: symbol 'uart_zynq1_puts' was not declared. Should it be static? drivers/serial/serial_zynq.c:185:22: warning: symbol 'uart_zynq_serial1_device' was not declared. Should it be static? Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2014-05-06net: zynq: Fix sparse warnings in gemMichal Simek
Add missing header. Warnings: drivers/net/zynq_gem.c:491:5: warning: symbol 'zynq_gem_initialize' was not declared. Should it be static? drivers/net/zynq_gem.c:542:5: warning: symbol 'zynq_gem_of_init' was not declared. Should it be static? Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2014-05-06net: zynq: Use predefined macros instead of hardcoded valueMichal Simek
MII is used by this driver. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2014-05-06microblaze: Wire up OF support for emacliteStephan Linz
- expand the condition with CONFIG_OF_CONTROL Signed-off-by: Stephan Linz <linz@li-pro.net> Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2014-05-05common: fixed linker-list exampleMateusz Zalega
Last argument shouldn't be there. Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Acked-by: Marek Vasut <marex@denx.de> Cc: Tom Rini <trini@ti.com>
2014-05-05USB: gadget: save driver name before registering itStephen Warren
g_dnl_register() currently first attempts to register a composite driver by name, and then saves the driver name once it's registered. Internally to the registration code, g_dnl_do_config() is called and attempts to compare the composite device's name with the list of known device names. This fails since the composite device's name has not yet been stored. This means that the first time "ums 0 0" is run, it fails, but subsequent attempts succeed. Re-order the name-saving and registration code to solve this. Fixes: e5b834e07f51 ("USB: gadget: added a saner gadget downloader registration API") Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-05-05USB: gadget: added a saner gadget downloader registration APIMateusz Zalega
Preprocessor definitions and hardcoded implementation selection in g_dnl core were replaced by a linker list made of (usb_function_name, bind_callback) pairs. Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Marek Vasut <marex@denx.de>
2014-05-05am335x: dfu: disable DFU in am335x_evm SPL buildMateusz Zalega
Future patches will make DFU too large to fit in this board's SPL build. Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Acked-by: Tom Rini <trini@ti.com> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
2014-05-05ums: always initialize mmc before ums_disk_init()Mateusz Zalega
In cases when MMC hadn't been initialized before, ie. by the user or other subsystem, it was still uninitialized while UMS media capacity check, leading to broken ums command. UMS has to initialize resources it uses. Tested on Samsung Goni. Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Tested-by: Mateusz Zalega <m.zalega@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com>
2014-05-05dfu: mmc: change offset base handlingMateusz Zalega
Previously offsets handled by dfu_fill_entity_mmc(), defined in boards' CONFIG_DFU_ALT were treated as hexadecimal regardless of their prefix, which sometimes led to confusion. This patch forces usage of explicit numerical base prefixes. Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Cc: Tom Rini <trini@ti.com> Cc: Minkyu Kang <mk7.kang@samsung.com>
2014-05-05dfu: mmc: raw data write fixMateusz Zalega
When user attempted to perform a raw write using DFU (vide dfu_fill_entity_mmc) with MMC interface not initialized before, get_mmc_blk_size() reported invalid (zero) block size - it wasn't possible to write ie. a new u-boot image. This commit fixes that by initializing MMC device before use in dfu_fill_entity_mmc(). While fixing initialization sequence, I had to change about half of dfu_fill_entity_mmc's body, so I refactored it on the way to make it, IMHO, considerably more comprehensible. Being left as dead code, get_mmc_blk_size() was removed. Tested on Samsung Goni. Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Tom Rini <trini@ti.com> Cc: Minkyu Kang <mk7.kang@samsung.com>
2014-05-05usb: dfu: fix boards wo USB cable detectionMateusz Zalega
Former usb_cable_connected() patch broke compilation of boards which do not support this feature. I've renamed usb_cable_connected() to g_dnl_usb_cable_connected() and added its default implementation to gadget downloader driver code. There's only one driver of this kind and it's unlikely there'll be another, so there's no point in keeping it in /common. Previously this function was declared in usb.h. I've moved it, since it's more appropriate to keep it in g_dnl.h - usb.h seems to be intended for USB host implementation. Existing code, confronted with default -EOPNOTSUPP return value, continues as if the cable was connected. CONFIG_USB_CABLE_CHECK was removed. Change-Id: Ib9198621adee2811b391c64512f14646cefd0369 Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Acked-by: Marek Vasut <marex@denx.de> Acked-by: Lukasz Majewski <l.majewski@samsung.com>
2014-05-05part: header fixMateusz Zalega
Implementation made use of types defined in common.h, even though it wasn't #included. It worked in circumstances when .c files included every needed header (all). Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Cc: Tom Rini <trini@ti.com> Cc: Minkyu Kang <mk7.kang@samsung.com>
2014-05-05mmc: mmc header fixMateusz Zalega
Structure definition used type block_dev_desc_t, defined in part.h, which wasn't included in mmc.h. It worked only in circumstances when common.h, or another header using part.h was incuded in implementation files. Change-Id: I5b203928b689887e3e78beb00a378955e0553eb7 Signed-off-by: Mateusz Zalega <m.zalega@samsung.com> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com> Cc: Minkyu Kang <mk7.kang@samsung.com>
2014-05-02Merge branch 'next' of git://git.denx.de/u-boot-shTom Rini
2014-05-01usb: gadget: allow ci_udc to build with new gadget frameworkStephen Warren
Allow ci_udc.o to be built when using the new(?) USB gadget framework, as enabled by CONFIG_USB_GADGET. Note that this duplicates the Makefile entry for ci_udc.o, since it's also included inside #ifdef CONFIG_USB_ETHER. I'm not sure what that define means; perhaps an old style of Ethernet-specific USB gadget implementation? I wonder if the line that this patch adds shouldn't be outside all of the ifdefs, so it stands on its own, similar to how e.g. epautoconf.o is shared between the two? Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-04-30usb: ums: use only 1 buffer for CI_UDCStephen Warren
ci_udc.c allocates only a single buffer for each endpoint, which ci_ep_alloc_request() returns as a hard-coded value rather than dynamically allocating. Consequently, storage_common.c must limit itself to using a single buffer at a time. Add a special case to the definition of FSG_NUM_BUFFERS for this. Another option would be to fix ci_ep_alloc_request() to dynamically allocate the buffers like some/all(?) other device mode drivers do. However, I don't think that ci_ep_queue() supports queueing up multiple buffers either yet, and I'm not familiar enough with the controller yet to implement that. As such, any attempt to use multiple buffers simply results in data corruption and other errors. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-04-30usb: ci_udc: support variants with hostpc registerStephen Warren
Tegra's USB controller appears to be a variant of the ChipIdea controller; perhaps derived from it, or simply a different version of the IP core to what U-Boot supports today. In this variant, at least the following difference are present: - Some registers are moved about. - Setup transaction completion is reported in a separate 'epsetupstat' register, rather than in 'epstat' (which still exists, perhaps for other transaction types). - USB connection speed is reported in a separate 'hostpc1_devlc' register, rather than 'portsc'. - The registers used by ci_udc.c begin at offset 0x130 from the USB register base, rather than offset 0x140. However, this is handled by the associated EHCI controller driver, since the register address is stored in controller.ctrl->hcor. Introduce define CONFIG_CI_UDC_HAS_HOSTPC to indicate which variant of the controller should be supported. The "HAS_HOSTPC" part of this name mirrors the similar "has_hostpc" field used by the Linux EHCI controller core to represent the presence/absence of the hostpc1_devlc register. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-04-30usb: ci_udc: make PHY initialization conditionalStephen Warren
usb_gadget_register_driver() currently unconditionally programs PORTSC to select a ULPI PHY. This is incorrect on at least the Tegra boards I am testing with, which use a UTMI PHY for the OTG ports. Make the PHY selection code conditional upon the specific EHCI controller that is in use. Ideally, I believe that the PHY initialization code should be part of ehci_hcd_init() in the relevant EHCI controller driver, or some board- specific function that ehci_hcd_init() calls. For MX6, I'm not sure this PHY initialization code is correct even before this patch, since ehci-mx6's ehci_hcd_init() already configures PORTSC to a board-specific value, and it seems likely that the code in ci_udc.c is incorrectly undoing this. Perhaps this is not an issue if the PHY selection register bits aren't implemented on this instance of the MX6 USB controller? ehci-mxs.c doens't appear to touch PORTSC, so this code is likely still required there. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-04-30usb: ci_udc: set ep->req.actual after transferStephen Warren
At least drivers/usb/gadget/storage_common.c expects that ep->req.actual contain the number of bytes actually transferred. (At least in practice, I observed it failing to work correctly unless this was the case). However, ci_udc.c modifies ep->req.length instead. I assume that .length is supposed to represent the allocated buffer size, whereas .actual is supposed to represent the actual number of bytes transferred. In the OUT transaction case, this may happen simply because the host sends a smaller packet than the max possible size, which is quite legal. In the IN case, transferring fewer bytes than requested could presumably happen as an error. Modify handle_ep_complete() to write to .actual rather than modifying .length. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-04-30usb: ci_udc: Support larger packetsStephen Warren
ci_ep_queue() currently only fills in the page0/page1 fields in the queue item. If the buffer is larger than 4KiB (unaligned) or 8KiB (page-aligned), then this prevents the HW from knowing where to write the balance of the data. Fix this by initializing all 5 pageN pointers, which allows up to 16KiB (potentially non-page-aligned) buffers. Signed-off-by: Stephen Warren <swarren@nvidia.com>
2014-04-30dfu:fix: Replace wrong return value with proper oneLukasz Majewski
This patch remove always false (since we tested ret = 0) ternary operator with ret value returned. Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
2014-04-30exynos: usb: Fix data abort on boards w/o vbus-gpio node in the DTandrey.konovalov@linaro.org
Commit 4a271cb1b4ff doesn't take into account that fdtdec_setup_gpio() returns success when the gpio passed to it is FDT_GPIO_NONE (no gpio node found in the fdtdec_decode_gpio() call). This results in calling gpio_direction_output() on invalid gpio. For this reason executing "usb start" command on Arndale causes data abort in the ehci-exynos driver. Add the fdt_gpio_isvalid() check to fix that problem. Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org> Cc: Julius Werner <jwerner@chromium.org> Cc: Simon Glass <sjg@chromium.org> Cc: Minkyu Kang <mk7.kang@samsung.com> Cc: Marek Vasut <marex@denx.de>
2014-04-30usb: musb: fill in usb_gadget_unregister_driverRob Herring
Add missing missing disconnect and unbind calls to the musb gadget driver's usb_gadget_unregister_driver function. Otherwise, any gadget drivers fail to uninitialize and run a 2nd time. Signed-off-by: Rob Herring <robh@kernel.org>
2014-04-30usb: handle NULL table in usb_gadget_get_stringRob Herring
Allow a NULL table to be passed to usb_gadget_get_string for cases when a string table may not be populated. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Tom Rini <trini@ti.com> Acked-by: Marek Vasut <marex@denx.de> Acked-by: Lukasz Majewski <l.majewski@samsung.com>
2014-04-30usb:gadget:f_thor: fix write to filesystem by add dfu_flush()Przemyslaw Marczak
Since dfu read/write operations needs to be flushed manually, writing to filesystem on MMC by thor was broken. MMC raw write actually is working fine because current dfu_flush() function writes filesystem only. This commit adds dfu_flush() to f_thor and now filesystem write is working. This change was tested on Trats2 board. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Lukasz Majewski <l.majewski@samsung.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Tom Rini <trini@ti.com>
2014-04-30usb:gadget:f_thor: code cleanup in function download_tail()Przemyslaw Marczak
In thor's download_tail() function, dfu_get_entity() is called before each dfu_write() call and the returned entity pointers are the same. So dfu_get_entity() can be called just once and this patch changes this. Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Lukasz Majewski <l.majewski@samsung.com> Cc: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Tom Rini <trini@ti.com>
2014-04-30usb: Fix USB keyboard polling via control endpointAdrian Cox
USB keyboard polling failed for some keyboards on PowerPC 5020. This was caused by requesting only 4 bytes of data from keyboards that produce an 8 byte HID report. Signed-off-by: Adrian Cox <adrian@humboldt.co.uk> Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Marek Vasut <marex@denx.de>
2014-04-30usb: Add endian support macros to interrupt transfers in the EHCI driver.Adrian Cox
Update the EHCI driver to support interrupt transfers on PowerPC. Signed-off-by: Adrian Cox <adrian@humboldt.co.uk>
2014-04-30usb: ehci: rmobile: Add support ehci host driver of rmobile SoCsNobuhiro Iwamatsu
The rmobile SoC has usb host controller. This supports USB controllers listed in the R8A7790, R8A7791 and R8A7740. Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> Reviewed-by: Marek Vasut <marex@denx.de>
2014-04-30sh: delete an unused source fileMasahiro Yamada
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> Acked-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2014-04-29drivers/i2c/fsl_i2c: modify i2c_read to handle multi-byte writeShaveta Leekha
Most of the I2C slaves support accesses in the typical style that is : read/write series of bytes at particular address offset. These transactions look like:" (1) START:Address:Tx:Offset:RESTART:Address[0..4]:Tx/Rx:data[0..n]:STOP" However there are certain devices which support accesses in terms of the transactions as follows: (2) "START:Address:Tx:Txdata[0..n1]:Clock_stretching: RESTART:Address:Rx:data[0..n2]" Here Txdata is typically a command and some associated data, similarly Rxdata could be command status plus some data received as a response to the command sent. Type (1) transactions are currently supportd in the i2c driver using i2c_read and i2c_write APIs. I2C EEPROMs, RTC, etc fall in this category. To handle type (2) along with type (1) transactions, i2c_read() function has been modified. Signed-off-by: Shaveta Leekha <shaveta@freescale.com> Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
2014-04-29driver/mxc_i2c: Move static data structure to global_dataYork Sun
This driver needs a data structure in SRAM before SDRAM is available. This is not alway the case using .data section. Moving this data structure to global_data guarantees it is writable. Signed-off-by: York Sun <yorksun@freescale.com> CC: Troy Kisky <troy.kisky@boundarydevices.com>