Commit d8512731 authored by Thomas Abraham's avatar Thomas Abraham Committed by Ben Dooks

ARM: S5PV210: Add serial port support

This patch adds UART serial port support for S5PV210.
Signed-off-by: default avatarThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent 0647aee0
......@@ -194,6 +194,36 @@
#define S3C64XX_UINTSP 0x34
#define S3C64XX_UINTM 0x38
/* Following are specific to S5PV210 and S5P6442 */
#define S5PV210_UCON_CLKMASK (1<<10)
#define S5PV210_UCON_PCLK (0<<10)
#define S5PV210_UCON_UCLK (1<<10)
#define S5PV210_UFCON_TXTRIG0 (0<<8)
#define S5PV210_UFCON_TXTRIG4 (1<<8)
#define S5PV210_UFCON_TXTRIG8 (2<<8)
#define S5PV210_UFCON_TXTRIG16 (3<<8)
#define S5PV210_UFCON_TXTRIG32 (4<<8)
#define S5PV210_UFCON_TXTRIG64 (5<<8)
#define S5PV210_UFCON_TXTRIG128 (6<<8)
#define S5PV210_UFCON_TXTRIG256 (7<<8)
#define S5PV210_UFCON_RXTRIG1 (0<<4)
#define S5PV210_UFCON_RXTRIG4 (1<<4)
#define S5PV210_UFCON_RXTRIG8 (2<<4)
#define S5PV210_UFCON_RXTRIG16 (3<<4)
#define S5PV210_UFCON_RXTRIG32 (4<<4)
#define S5PV210_UFCON_RXTRIG64 (5<<4)
#define S5PV210_UFCON_RXTRIG128 (6<<4)
#define S5PV210_UFCON_RXTRIG256 (7<<4)
#define S5PV210_UFSTAT_TXFULL (1<<24)
#define S5PV210_UFSTAT_RXFULL (1<<8)
#define S5PV210_UFSTAT_TXMASK (255<<16)
#define S5PV210_UFSTAT_TXSHIFT (16)
#define S5PV210_UFSTAT_RXMASK (255<<0)
#define S5PV210_UFSTAT_RXSHIFT (0)
#ifndef __ASSEMBLY__
/* struct s3c24xx_uart_clksrc
......
......@@ -459,7 +459,7 @@ config SERIAL_SAMSUNG_UARTS
int
depends on ARM && PLAT_S3C
default 2 if ARCH_S3C2400
default 4 if ARCH_S5P6440 || ARCH_S5PC1XX || ARCH_S3C64XX || CPU_S3C2443
default 4 if ARCH_S5P6440 || ARCH_S5PC1XX || ARCH_S5PV210 || ARCH_S3C64XX || CPU_S3C2443
default 3
help
Select the number of available UART ports for the Samsung S3C
......@@ -540,6 +540,13 @@ config SERIAL_S5PC100
help
Serial port support for the Samsung S5PC100 SoCs
config SERIAL_S5PV210
tristate "Samsung S5PV210 Serial port support"
depends on SERIAL_SAMSUNG && CPU_S5PV210
default y
help
Serial port support for Samsung's S5P Family of SoC's
config SERIAL_MAX3100
tristate "MAX3100 support"
depends on SPI
......
......@@ -45,6 +45,7 @@ obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o
obj-$(CONFIG_SERIAL_S3C24A0) += s3c24a0.o
obj-$(CONFIG_SERIAL_S3C6400) += s3c6400.o
obj-$(CONFIG_SERIAL_S5PC100) += s3c6400.o
obj-$(CONFIG_SERIAL_S5PV210) += s5pv210.o
obj-$(CONFIG_SERIAL_MAX3100) += max3100.o
obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o
obj-$(CONFIG_SERIAL_MUX) += mux.o
......
/* linux/drivers/serial/s5pv210.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* Based on drivers/serial/s3c6400.c
*
* Driver for Samsung S5PV210 SoC UARTs.
*
* 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 s5pv210_serial_setsource(struct uart_port *port,
struct s3c24xx_uart_clksrc *clk)
{
unsigned long ucon = rd_regl(port, S3C2410_UCON);
if (strcmp(clk->name, "pclk") == 0)
ucon &= ~S5PV210_UCON_CLKMASK;
else if (strcmp(clk->name, "uclk1") == 0)
ucon |= S5PV210_UCON_CLKMASK;
else {
printk(KERN_ERR "unknown clock source %s\n", clk->name);
return -EINVAL;
}
wr_regl(port, S3C2410_UCON, ucon);
return 0;
}
static int s5pv210_serial_getsource(struct uart_port *port,
struct s3c24xx_uart_clksrc *clk)
{
u32 ucon = rd_regl(port, S3C2410_UCON);
clk->divisor = 1;
switch (ucon & S5PV210_UCON_CLKMASK) {
case S5PV210_UCON_PCLK:
clk->name = "pclk";
break;
case S5PV210_UCON_UCLK:
clk->name = "uclk1";
break;
}
return 0;
}
static int s5pv210_serial_resetport(struct uart_port *port,
struct s3c2410_uartcfg *cfg)
{
unsigned long ucon = rd_regl(port, S3C2410_UCON);
ucon &= S5PV210_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;
}
#define S5PV210_UART_DEFAULT_INFO(fifo_size) \
.name = "Samsung S5PV210 UART0", \
.type = PORT_S3C6400, \
.fifosize = fifo_size, \
.has_divslot = 1, \
.rx_fifomask = S5PV210_UFSTAT_RXMASK, \
.rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \
.rx_fifofull = S5PV210_UFSTAT_RXFULL, \
.tx_fifofull = S5PV210_UFSTAT_TXFULL, \
.tx_fifomask = S5PV210_UFSTAT_TXMASK, \
.tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, \
.get_clksrc = s5pv210_serial_getsource, \
.set_clksrc = s5pv210_serial_setsource, \
.reset_port = s5pv210_serial_resetport
static struct s3c24xx_uart_info s5p_port_fifo256 = {
S5PV210_UART_DEFAULT_INFO(256),
};
static struct s3c24xx_uart_info s5p_port_fifo64 = {
S5PV210_UART_DEFAULT_INFO(64),
};
static struct s3c24xx_uart_info s5p_port_fifo16 = {
S5PV210_UART_DEFAULT_INFO(16),
};
static struct s3c24xx_uart_info *s5p_uart_inf[] = {
[0] = &s5p_port_fifo256,
[1] = &s5p_port_fifo64,
[2] = &s5p_port_fifo16,
[3] = &s5p_port_fifo16,
};
/* device management */
static int s5p_serial_probe(struct platform_device *pdev)
{
return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]);
}
static struct platform_driver s5p_serial_drv = {
.probe = s5p_serial_probe,
.remove = __devexit_p(s3c24xx_serial_remove),
.driver = {
.name = "s5pv210-uart",
.owner = THIS_MODULE,
},
};
static int __init s5pv210_serial_console_init(void)
{
return s3c24xx_serial_initconsole(&s5p_serial_drv, s5p_uart_inf);
}
console_initcall(s5pv210_serial_console_init);
static int __init s5p_serial_init(void)
{
return s3c24xx_serial_init(&s5p_serial_drv, *s5p_uart_inf);
}
static void __exit s5p_serial_exit(void)
{
platform_driver_unregister(&s5p_serial_drv);
}
module_init(s5p_serial_init);
module_exit(s5p_serial_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s5pv210-uart");
MODULE_DESCRIPTION("Samsung S5PV210 UART Driver support");
MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment