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authorLinus Torvalds <torvalds@linux-foundation.org>2008-12-30 17:36:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-30 17:36:49 -0800
commit14a3c4ab0e58d143c7928c9eb2f2610205e13bf2 (patch)
tree885992999d7a1a2fd3586efcf32ebcbcbc3a72aa /drivers/serial
parent1af237a099a3b8ff56aa384f605c6a68af7bf288 (diff)
parent47992cbdaef2f18a47871b2ed01ad27f568c8b73 (diff)
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (407 commits) [ARM] pxafb: add support for overlay1 and overlay2 as framebuffer devices [ARM] pxafb: cleanup of the timing checking code [ARM] pxafb: cleanup of the color format manipulation code [ARM] pxafb: add palette format support for LCCR4_PAL_FOR_3 [ARM] pxafb: add support for FBIOPAN_DISPLAY by dma braching [ARM] pxafb: allow pxafb_set_par() to start from arbitrary yoffset [ARM] pxafb: allow video memory size to be configurable [ARM] pxa: add document on the MFP design and how to use it [ARM] sa1100_wdt: don't assume CLOCK_TICK_RATE to be a constant [ARM] rtc-sa1100: don't assume CLOCK_TICK_RATE to be a constant [ARM] pxa/tavorevb: update board support (smartpanel LCD + keypad) [ARM] pxa: Update eseries defconfig [ARM] 5352/1: add w90p910-plat config file [ARM] s3c: S3C options should depend on PLAT_S3C [ARM] mv78xx0: implement GPIO and GPIO interrupt support [ARM] Kirkwood: implement GPIO and GPIO interrupt support [ARM] Orion: share GPIO IRQ handling code [ARM] Orion: share GPIO handling code [ARM] s3c: define __io using the typesafe version [ARM] S3C64XX: Ensure CPU_V6 is selected ...
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/Kconfig25
-rw-r--r--drivers/serial/Makefile2
-rw-r--r--drivers/serial/amba-pl010.c2
-rw-r--r--drivers/serial/amba-pl011.c2
-rw-r--r--drivers/serial/imx.c8
-rw-r--r--drivers/serial/pxa.c3
-rw-r--r--drivers/serial/s3c24a0.c118
-rw-r--r--drivers/serial/s3c6400.c151
-rw-r--r--drivers/serial/samsung.c184
-rw-r--r--drivers/serial/samsung.h9
-rw-r--r--drivers/serial/serial_lh7a40x.c3
11 files changed, 461 insertions, 46 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 579d63a81aa2..b695ab3142d8 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -447,7 +447,7 @@ config SERIAL_CLPS711X_CONSOLE
config SERIAL_SAMSUNG
tristate "Samsung SoC serial support"
- depends on ARM && PLAT_S3C24XX
+ depends on ARM && PLAT_S3C
select SERIAL_CORE
help
Support for the on-chip UARTs on the Samsung S3C24XX series CPUs,
@@ -455,6 +455,16 @@ config SERIAL_SAMSUNG
provide all of these ports, depending on how the serial port
pins are configured.
+config SERIAL_SAMSUNG_UARTS
+ int
+ depends on SERIAL_SAMSUNG
+ default 2 if ARCH_S3C2400
+ default 4 if ARCH_S3C64XX || CPU_S3C2443
+ default 3
+ help
+ Select the number of available UART ports for the Samsung S3C
+ serial driver
+
config SERIAL_SAMSUNG_DEBUG
bool "Samsung SoC serial debug"
depends on SERIAL_SAMSUNG && DEBUG_LL
@@ -508,7 +518,20 @@ config SERIAL_S3C2440
help
Serial port support for the Samsung S3C2440 and S3C2442 SoC
+config SERIAL_S3C24A0
+ tristate "Samsung S3C24A0 Serial port support"
+ depends on SERIAL_SAMSUNG && CPU_S3C24A0
+ default y if CPU_S3C24A0
+ help
+ Serial port support for the Samsung S3C24A0 SoC
+config SERIAL_S3C6400
+ tristate "Samsung S3C6400/S3C6410 Serial port support"
+ depends on SERIAL_SAMSUNG && (CPU_S3C600 || CPU_S3C6410)
+ default y
+ help
+ Serial port support for the Samsung S3C6400 and S3C6410
+ SoCs
config SERIAL_DZ
bool "DECstation DZ serial driver"
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 0c17c8ddb19d..dfe775ac45b2 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -41,6 +41,8 @@ obj-$(CONFIG_SERIAL_S3C2400) += s3c2400.o
obj-$(CONFIG_SERIAL_S3C2410) += s3c2410.o
obj-$(CONFIG_SERIAL_S3C2412) += s3c2412.o
obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o
+obj-$(CONFIG_SERIAL_S3C24A0) += s3c24a0.o
+obj-$(CONFIG_SERIAL_S3C6400) += s3c6400.o
obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o
obj-$(CONFIG_SERIAL_MUX) += mux.o
obj-$(CONFIG_SERIAL_68328) += 68328serial.o
diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
index 71562689116f..e3a5ad5ef1d6 100644
--- a/drivers/serial/amba-pl010.c
+++ b/drivers/serial/amba-pl010.c
@@ -692,7 +692,7 @@ static int pl010_probe(struct amba_device *dev, void *id)
goto free;
}
- uap->clk = clk_get(&dev->dev, "UARTCLK");
+ uap->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(uap->clk)) {
ret = PTR_ERR(uap->clk);
goto unmap;
diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c
index b7180046f8db..8b2b9700f3e4 100644
--- a/drivers/serial/amba-pl011.c
+++ b/drivers/serial/amba-pl011.c
@@ -756,7 +756,7 @@ static int pl011_probe(struct amba_device *dev, void *id)
goto free;
}
- uap->clk = clk_get(&dev->dev, "UARTCLK");
+ uap->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(uap->clk)) {
ret = PTR_ERR(uap->clk);
goto unmap;
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 3f90f1bbbbcd..a50954612b60 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -66,7 +66,7 @@
#define ONEMS 0xb0 /* One Millisecond register */
#define UTS 0xb4 /* UART Test Register */
#endif
-#ifdef CONFIG_ARCH_IMX
+#if defined(CONFIG_ARCH_IMX) || defined(CONFIG_ARCH_MX1)
#define BIPR1 0xb0 /* Incremental Preset Register 1 */
#define BIPR2 0xb4 /* Incremental Preset Register 2 */
#define BIPR3 0xb8 /* Incremental Preset Register 3 */
@@ -96,7 +96,7 @@
#define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */
#define UCR1_SNDBRK (1<<4) /* Send break */
#define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */
-#ifdef CONFIG_ARCH_IMX
+#if defined(CONFIG_ARCH_IMX) || defined(CONFIG_ARCH_MX1)
#define UCR1_UARTCLKEN (1<<2) /* UART clock enabled */
#endif
#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2
@@ -187,11 +187,11 @@
#define MAX_INTERNAL_IRQ IMX_IRQS
#endif
-#if defined CONFIG_ARCH_MX3 || defined CONFIG_ARCH_MX2
+#ifdef CONFIG_ARCH_MXC
#define SERIAL_IMX_MAJOR 207
#define MINOR_START 16
#define DEV_NAME "ttymxc"
-#define MAX_INTERNAL_IRQ MXC_MAX_INT_LINES
+#define MAX_INTERNAL_IRQ MXC_INTERNAL_IRQS
#endif
/*
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index abc00be55433..f6e3b86bb0be 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -48,6 +48,7 @@
#include <mach/hardware.h>
#include <asm/irq.h>
#include <mach/pxa-regs.h>
+#include <mach/regs-uart.h>
struct uart_pxa_port {
@@ -766,7 +767,7 @@ static int serial_pxa_probe(struct platform_device *dev)
if (!sport)
return -ENOMEM;
- sport->clk = clk_get(&dev->dev, "UARTCLK");
+ sport->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(sport->clk)) {
ret = PTR_ERR(sport->clk);
goto err_free;
diff --git a/drivers/serial/s3c24a0.c b/drivers/serial/s3c24a0.c
new file mode 100644
index 000000000000..ebf2fd3c8f7d
--- /dev/null
+++ b/drivers/serial/s3c24a0.c
@@ -0,0 +1,118 @@
+/* linux/drivers/serial/s3c24a0.c
+ *
+ * Driver for Samsung S3C24A0 SoC onboard UARTs.
+ *
+ * Based on drivers/serial/s3c2410.c
+ *
+ * Author: Sandeep Patil <sandeep.patil@azingo.com>
+ *
+ * Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/serial_core.h>
+#include <linux/serial.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+
+#include <mach/hardware.h>
+
+#include <plat/regs-serial.h>
+#include <mach/regs-gpio.h>
+
+#include "samsung.h"
+
+static int s3c24a0_serial_setsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ if (strcmp(clk->name, "uclk") == 0)
+ ucon |= S3C2410_UCON_UCLK;
+ else
+ ucon &= ~S3C2410_UCON_UCLK;
+
+ wr_regl(port, S3C2410_UCON, ucon);
+ return 0;
+}
+
+static int s3c24a0_serial_getsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ clk->divisor = 1;
+ clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk";
+
+ return 0;
+}
+
+static int s3c24a0_serial_resetport(struct uart_port *port,
+ struct s3c2410_uartcfg *cfg)
+{
+ dbg("s3c24a0_serial_resetport: port=%p (%08lx), cfg=%p\n",
+ port, port->mapbase, cfg);
+
+ wr_regl(port, S3C2410_UCON, cfg->ucon);
+ wr_regl(port, S3C2410_ULCON, cfg->ulcon);
+
+ /* reset both fifos */
+
+ wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
+ wr_regl(port, S3C2410_UFCON, cfg->ufcon);
+
+ return 0;
+}
+
+static struct s3c24xx_uart_info s3c24a0_uart_inf = {
+ .name = "Samsung S3C24A0 UART",
+ .type = PORT_S3C2410,
+ .fifosize = 16,
+ .rx_fifomask = S3C24A0_UFSTAT_RXMASK,
+ .rx_fifoshift = S3C24A0_UFSTAT_RXSHIFT,
+ .rx_fifofull = S3C24A0_UFSTAT_RXFULL,
+ .tx_fifofull = S3C24A0_UFSTAT_TXFULL,
+ .tx_fifomask = S3C24A0_UFSTAT_TXMASK,
+ .tx_fifoshift = S3C24A0_UFSTAT_TXSHIFT,
+ .get_clksrc = s3c24a0_serial_getsource,
+ .set_clksrc = s3c24a0_serial_setsource,
+ .reset_port = s3c24a0_serial_resetport,
+};
+
+static int s3c24a0_serial_probe(struct platform_device *dev)
+{
+ return s3c24xx_serial_probe(dev, &s3c24a0_uart_inf);
+}
+
+static struct platform_driver s3c24a0_serial_drv = {
+ .probe = s3c24a0_serial_probe,
+ .remove = s3c24xx_serial_remove,
+ .driver = {
+ .name = "s3c24a0-uart",
+ .owner = THIS_MODULE,
+ },
+};
+
+s3c24xx_console_init(&s3c24a0_serial_drv, &s3c24a0_uart_inf);
+
+static int __init s3c24a0_serial_init(void)
+{
+ return s3c24xx_serial_init(&s3c24a0_serial_drv, &s3c24a0_uart_inf);
+}
+
+static void __exit s3c24a0_serial_exit(void)
+{
+ platform_driver_unregister(&s3c24a0_serial_drv);
+}
+
+module_init(s3c24a0_serial_init);
+module_exit(s3c24a0_serial_exit);
+
diff --git a/drivers/serial/s3c6400.c b/drivers/serial/s3c6400.c
new file mode 100644
index 000000000000..06936d13393f
--- /dev/null
+++ b/drivers/serial/s3c6400.c
@@ -0,0 +1,151 @@
+/* linux/drivers/serial/s3c6400.c
+ *
+ * Driver for Samsung S3C6400 and S3C6410 SoC onboard UARTs.
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/serial_core.h>
+#include <linux/serial.h>
+
+#include <asm/irq.h>
+#include <mach/hardware.h>
+
+#include <plat/regs-serial.h>
+
+#include "samsung.h"
+
+static int s3c6400_serial_setsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ if (strcmp(clk->name, "uclk0") == 0) {
+ ucon &= ~S3C6400_UCON_CLKMASK;
+ ucon |= S3C6400_UCON_UCLK0;
+ } else if (strcmp(clk->name, "uclk1") == 0)
+ ucon |= S3C6400_UCON_UCLK1;
+ else if (strcmp(clk->name, "pclk") == 0) {
+ /* See notes about transitioning from UCLK to PCLK */
+ ucon &= ~S3C6400_UCON_UCLK0;
+ } else {
+ printk(KERN_ERR "unknown clock source %s\n", clk->name);
+ return -EINVAL;
+ }
+
+ wr_regl(port, S3C2410_UCON, ucon);
+ return 0;
+}
+
+
+static int s3c6400_serial_getsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ u32 ucon = rd_regl(port, S3C2410_UCON);
+
+ clk->divisor = 1;
+
+ switch (ucon & S3C6400_UCON_CLKMASK) {
+ case S3C6400_UCON_UCLK0:
+ clk->name = "uclk0";
+ break;
+
+ case S3C6400_UCON_UCLK1:
+ clk->name = "uclk1";
+ break;
+
+ case S3C6400_UCON_PCLK:
+ case S3C6400_UCON_PCLK2:
+ clk->name = "pclk";
+ break;
+ }
+
+ return 0;
+}
+
+static int s3c6400_serial_resetport(struct uart_port *port,
+ struct s3c2410_uartcfg *cfg)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ dbg("s3c6400_serial_resetport: port=%p (%08lx), cfg=%p\n",
+ port, port->mapbase, cfg);
+
+ /* ensure we don't change the clock settings... */
+
+ ucon &= S3C6400_UCON_CLKMASK;
+
+ wr_regl(port, S3C2410_UCON, ucon | cfg->ucon);
+ wr_regl(port, S3C2410_ULCON, cfg->ulcon);
+
+ /* reset both fifos */
+
+ wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
+ wr_regl(port, S3C2410_UFCON, cfg->ufcon);
+
+ return 0;
+}
+
+static struct s3c24xx_uart_info s3c6400_uart_inf = {
+ .name = "Samsung S3C6400 UART",
+ .type = PORT_S3C6400,
+ .fifosize = 64,
+ .rx_fifomask = S3C2440_UFSTAT_RXMASK,
+ .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT,
+ .rx_fifofull = S3C2440_UFSTAT_RXFULL,
+ .tx_fifofull = S3C2440_UFSTAT_TXFULL,
+ .tx_fifomask = S3C2440_UFSTAT_TXMASK,
+ .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT,
+ .get_clksrc = s3c6400_serial_getsource,
+ .set_clksrc = s3c6400_serial_setsource,
+ .reset_port = s3c6400_serial_resetport,
+};
+
+/* device management */
+
+static int s3c6400_serial_probe(struct platform_device *dev)
+{
+ dbg("s3c6400_serial_probe: dev=%p\n", dev);
+ return s3c24xx_serial_probe(dev, &s3c6400_uart_inf);
+}
+
+static struct platform_driver s3c6400_serial_drv = {
+ .probe = s3c6400_serial_probe,
+ .remove = s3c24xx_serial_remove,
+ .driver = {
+ .name = "s3c6400-uart",
+ .owner = THIS_MODULE,
+ },
+};
+
+s3c24xx_console_init(&s3c6400_serial_drv, &s3c6400_uart_inf);
+
+static int __init s3c6400_serial_init(void)
+{
+ return s3c24xx_serial_init(&s3c6400_serial_drv, &s3c6400_uart_inf);
+}
+
+static void __exit s3c6400_serial_exit(void)
+{
+ platform_driver_unregister(&s3c6400_serial_drv);
+}
+
+module_init(s3c6400_serial_init);
+module_exit(s3c6400_serial_exit);
+
+MODULE_DESCRIPTION("Samsung S3C6400,S3C6410 SoC Serial port driver");
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:s3c6400-uart");
diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c
index 1e219d3d0352..41ac94872b8d 100644
--- a/drivers/serial/samsung.c
+++ b/drivers/serial/samsung.c
@@ -42,13 +42,14 @@
#include <linux/serial.h>
#include <linux/delay.h>
#include <linux/clk.h>
+#include <linux/cpufreq.h>
#include <asm/irq.h>
#include <mach/hardware.h>
+#include <mach/map.h>
#include <plat/regs-serial.h>
-#include <mach/regs-gpio.h>
#include "samsung.h"
@@ -58,19 +59,6 @@
#define S3C24XX_SERIAL_MAJOR 204
#define S3C24XX_SERIAL_MINOR 64
-/* we can support 3 uarts, but not always use them */
-
-#ifdef CONFIG_CPU_S3C2400
-#define NR_PORTS (2)
-#else
-#define NR_PORTS (3)
-#endif
-
-/* port irq numbers */
-
-#define TX_IRQ(port) ((port)->irq + 1)
-#define RX_IRQ(port) ((port)->irq)
-
/* macros to change one thing to another */
#define tx_enabled(port) ((port)->unused[0])
@@ -136,8 +124,10 @@ static void s3c24xx_serial_rx_disable(struct uart_port *port)
static void s3c24xx_serial_stop_tx(struct uart_port *port)
{
+ struct s3c24xx_uart_port *ourport = to_ourport(port);
+
if (tx_enabled(port)) {
- disable_irq(TX_IRQ(port));
+ disable_irq(ourport->tx_irq);
tx_enabled(port) = 0;
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_enable(port);
@@ -146,11 +136,13 @@ static void s3c24xx_serial_stop_tx(struct uart_port *port)
static void s3c24xx_serial_start_tx(struct uart_port *port)
{
+ struct s3c24xx_uart_port *ourport = to_ourport(port);
+
if (!tx_enabled(port)) {
if (port->flags & UPF_CONS_FLOW)
s3c24xx_serial_rx_disable(port);
- enable_irq(TX_IRQ(port));
+ enable_irq(ourport->tx_irq);
tx_enabled(port) = 1;
}
}
@@ -158,9 +150,11 @@ static void s3c24xx_serial_start_tx(struct uart_port *port)
static void s3c24xx_serial_stop_rx(struct uart_port *port)
{
+ struct s3c24xx_uart_port *ourport = to_ourport(port);
+
if (rx_enabled(port)) {
dbg("s3c24xx_serial_stop_rx: port=%p\n", port);
- disable_irq(RX_IRQ(port));
+ disable_irq(ourport->rx_irq);
rx_enabled(port) = 0;
}
}
@@ -384,13 +378,13 @@ static void s3c24xx_serial_shutdown(struct uart_port *port)
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (ourport->tx_claimed) {
- free_irq(TX_IRQ(port), ourport);
+ free_irq(ourport->tx_irq, ourport);
tx_enabled(port) = 0;
ourport->tx_claimed = 0;
}
if (ourport->rx_claimed) {
- free_irq(RX_IRQ(port), ourport);
+ free_irq(ourport->rx_irq, ourport);
ourport->rx_claimed = 0;
rx_enabled(port) = 0;
}
@@ -407,12 +401,11 @@ static int s3c24xx_serial_startup(struct uart_port *port)
rx_enabled(port) = 1;
- ret = request_irq(RX_IRQ(port),
- s3c24xx_serial_rx_chars, 0,
+ ret = request_irq(ourport->rx_irq, s3c24xx_serial_rx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret != 0) {
- printk(KERN_ERR "cannot get irq %d\n", RX_IRQ(port));
+ printk(KERN_ERR "cannot get irq %d\n", ourport->rx_irq);
return ret;
}
@@ -422,12 +415,11 @@ static int s3c24xx_serial_startup(struct uart_port *port)
tx_enabled(port) = 1;
- ret = request_irq(TX_IRQ(port),
- s3c24xx_serial_tx_chars, 0,
+ ret = request_irq(ourport->tx_irq, s3c24xx_serial_tx_chars, 0,
s3c24xx_serial_portname(port), ourport);
if (ret) {
- printk(KERN_ERR "cannot get irq %d\n", TX_IRQ(port));
+ printk(KERN_ERR "cannot get irq %d\n", ourport->tx_irq);
goto err;
}
@@ -452,6 +444,8 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
{
struct s3c24xx_uart_port *ourport = to_ourport(port);
+ ourport->pm_level = level;
+
switch (level) {
case 3:
if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL)
@@ -661,6 +655,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
ourport->clksrc = clksrc;
ourport->baudclk = clk;
+ ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0;
}
switch (termios->c_cflag & CSIZE) {
@@ -752,6 +747,8 @@ static const char *s3c24xx_serial_type(struct uart_port *port)
return "S3C2440";
case PORT_S3C2412:
return "S3C2412";
+ case PORT_S3C6400:
+ return "S3C6400/10";
default:
return NULL;
}
@@ -827,14 +824,14 @@ static struct uart_ops s3c24xx_serial_ops = {
static struct uart_driver s3c24xx_uart_drv = {
.owner = THIS_MODULE,
.dev_name = "s3c2410_serial",
- .nr = 3,
+ .nr = CONFIG_SERIAL_SAMSUNG_UARTS,
.cons = S3C24XX_SERIAL_CONSOLE,
.driver_name = S3C24XX_SERIAL_NAME,
.major = S3C24XX_SERIAL_MAJOR,
.minor = S3C24XX_SERIAL_MINOR,
};
-static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
+static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
[0] = {
.port = {
.lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock),
@@ -859,7 +856,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
.line = 1,
}
},
-#if NR_PORTS > 2
+#if CONFIG_SERIAL_SAMSUNG_UARTS > 2
[2] = {
.port = {
@@ -872,6 +869,20 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
.flags = UPF_BOOT_AUTOCONF,
.line = 2,
}
+ },
+#endif
+#if CONFIG_SERIAL_SAMSUNG_UARTS > 3
+ [3] = {
+ .port = {
+ .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[3].port.lock),
+ .iotype = UPIO_MEM,
+ .irq = IRQ_S3CUART_RX3,
+ .uartclk = 0,
+ .fifosize = 16,
+ .ops = &s3c24xx_serial_ops,
+ .flags = UPF_BOOT_AUTOCONF,
+ .line = 3,
+ }
}
#endif
};
@@ -890,6 +901,89 @@ static inline int s3c24xx_serial_resetport(struct uart_port *port,
return (info->reset_port)(port, cfg);
}
+
+#ifdef CONFIG_CPU_FREQ
+
+static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ struct s3c24xx_uart_port *port;
+ struct uart_port *uport;
+
+ port = container_of(nb, struct s3c24xx_uart_port, freq_transition);
+ uport = &port->port;
+
+ /* check to see if port is enabled */
+
+ if (port->pm_level != 0)
+ return 0;
+
+ /* try and work out if the baudrate is changing, we can detect
+ * a change in rate, but we do not have support for detecting
+ * a disturbance in the clock-rate over the change.
+ */
+
+ if (IS_ERR(port->clk))
+ goto exit;
+
+ if (port->baudclk_rate == clk_get_rate(port->clk))
+ goto exit;
+
+ if (val == CPUFREQ_PRECHANGE) {
+ /* we should really shut the port down whilst the
+ * frequency change is in progress. */
+
+ } else if (val == CPUFREQ_POSTCHANGE) {
+ struct ktermios *termios;
+ struct tty_struct *tty;
+
+ if (uport->info == NULL)
+ goto exit;
+
+ tty = uport->info->port.tty;
+
+ if (tty == NULL)
+ goto exit;
+
+ termios = tty->termios;
+
+ if (termios == NULL) {
+ printk(KERN_WARNING "%s: no termios?\n", __func__);
+ goto exit;
+ }
+
+ s3c24xx_serial_set_termios(uport, termios, NULL);
+ }
+
+ exit:
+ return 0;
+}
+
+static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
+{
+ port->freq_transition.notifier_call = s3c24xx_serial_cpufreq_transition;
+
+ return cpufreq_register_notifier(&port->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
+{
+ cpufreq_unregister_notifier(&port->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+#else
+static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port)
+{
+ return 0;
+}
+
+static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
+{
+}
+#endif
+
/* s3c24xx_serial_init_port
*
* initialise a single serial port from the platform device given
@@ -914,8 +1008,11 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
if (port->mapbase != 0)
return 0;
- if (cfg->hwport > 3)
- return -EINVAL;
+ if (cfg->hwport > CONFIG_SERIAL_SAMSUNG_UARTS) {
+ printk(KERN_ERR "%s: port %d bigger than %d\n", __func__,
+ cfg->hwport, CONFIG_SERIAL_SAMSUNG_UARTS);
+ return -ERANGE;
+ }
/* setup info for port */
port->dev = &platdev->dev;
@@ -943,18 +1040,26 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
dbg("resource %p (%lx..%lx)\n", res, res->start, res->end);
- port->mapbase = res->start;
- port->membase = S3C24XX_VA_UART + (res->start - S3C24XX_PA_UART);
+ port->mapbase = res->start;
+ port->membase = S3C_VA_UART + res->start - (S3C_PA_UART & 0xfff00000);
ret = platform_get_irq(platdev, 0);
if (ret < 0)
port->irq = 0;
- else
+ else {
port->irq = ret;
+ ourport->rx_irq = ret;
+ ourport->tx_irq = ret + 1;
+ }
+
+ ret = platform_get_irq(platdev, 1);
+ if (ret > 0)
+ ourport->tx_irq = ret;
ourport->clk = clk_get(&platdev->dev, "uart");
- dbg("port: map=%08x, mem=%08x, irq=%d, clock=%ld\n",
- port->mapbase, port->membase, port->irq, port->uartclk);
+ dbg("port: map=%08x, mem=%08x, irq=%d (%d,%d), clock=%ld\n",
+ port->mapbase, port->membase, port->irq,
+ ourport->rx_irq, ourport->tx_irq, port->uartclk);
/* reset the fifos (and setup the uart) */
s3c24xx_serial_resetport(port, cfg);
@@ -1002,6 +1107,10 @@ int s3c24xx_serial_probe(struct platform_device *dev,
if (ret < 0)
printk(KERN_ERR "%s: failed to add clksrc attr.\n", __func__);
+ ret = s3c24xx_serial_cpufreq_register(ourport);
+ if (ret < 0)
+ dev_err(&dev->dev, "failed to add cpufreq notifier\n");
+
return 0;
probe_err:
@@ -1015,6 +1124,7 @@ int s3c24xx_serial_remove(struct platform_device *dev)
struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
if (port) {
+ s3c24xx_serial_cpufreq_deregister(to_ourport(port));
device_remove_file(&dev->dev, &dev_attr_clock_source);
uart_remove_one_port(&s3c24xx_uart_drv, port);
}
@@ -1219,7 +1329,7 @@ static int s3c24xx_serial_init_ports(struct s3c24xx_uart_info *info)
platdev_ptr = s3c24xx_uart_devs;
- for (i = 0; i < NR_PORTS; i++, ptr++, platdev_ptr++) {
+ for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++, ptr++, platdev_ptr++) {
s3c24xx_serial_init_port(ptr, info, *platdev_ptr);
}
@@ -1240,7 +1350,7 @@ s3c24xx_serial_console_setup(struct console *co, char *options)
/* is this a valid port */
- if (co->index == -1 || co->index >= NR_PORTS)
+ if (co->index == -1 || co->index >= CONFIG_SERIAL_SAMSUNG_UARTS)
co->index = 0;
port = &s3c24xx_serial_ports[co->index].port;
diff --git a/drivers/serial/samsung.h b/drivers/serial/samsung.h
index 5c92ebbe7d9e..571d6b90d206 100644
--- a/drivers/serial/samsung.h
+++ b/drivers/serial/samsung.h
@@ -33,12 +33,21 @@ struct s3c24xx_uart_info {
struct s3c24xx_uart_port {
unsigned char rx_claimed;
unsigned char tx_claimed;
+ unsigned int pm_level;
+ unsigned long baudclk_rate;
+
+ unsigned int rx_irq;
+ unsigned int tx_irq;
struct s3c24xx_uart_info *info;
struct s3c24xx_uart_clksrc *clksrc;
struct clk *clk;
struct clk *baudclk;
struct uart_port port;
+
+#ifdef CONFIG_CPU_FREQ
+ struct notifier_block freq_transition;
+#endif
};
/* conversion functions */
diff --git a/drivers/serial/serial_lh7a40x.c b/drivers/serial/serial_lh7a40x.c
index 61dc8b3daa26..a7bf024a8286 100644
--- a/drivers/serial/serial_lh7a40x.c
+++ b/drivers/serial/serial_lh7a40x.c
@@ -41,9 +41,10 @@
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
+#include <linux/io.h>
-#include <asm/io.h>
#include <asm/irq.h>
+#include <mach/hardware.h>
#define DEV_MAJOR 204
#define DEV_MINOR 16