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[ARM] S3C6400: serial support for S3C6400 and S3C6410 SoCs

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Add support to the Samsung serial driver for the S3C6400
and S3C6410 serial ports.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2008-10-21 14:07:03 +01:00
parent cf18acf0e0
commit b690ace50b
8 changed files with 178 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-s3c2410/include/mach/map.h
View File

@ -101,4 +101,6 @@
#define S3C24XX_PA_SDI S3C2410_PA_SDI
#define S3C24XX_PA_NAND S3C2410_PA_NAND
#define S3C_PA_UART S3C24XX_PA_UART
#endif /* __ASM_ARCH_MAP_H */

2
arch/arm/mach-s3c24a0/include/mach/map.h
View File

@ -80,4 +80,6 @@
#define S3C24XX_PA_SDI S3C24A0_PA_SDI
#define S3C24XX_PA_NAND S3C24A0_PA_NAND
#define S3C_PA_UART S3C24A0_PA_UART
#endif /* __ASM_ARCH_24A0_MAP_H */

6
arch/arm/plat-s3c/include/plat/regs-serial.h
View File

@ -77,6 +77,12 @@
#define S3C2440_UCON_FCLK (3<<10)
#define S3C2443_UCON_EPLL (3<<10)
#define S3C6400_UCON_CLKMASK (3<<10)
#define S3C6400_UCON_PCLK (0<<10)
#define S3C6400_UCON_PCLK2 (2<<10)
#define S3C6400_UCON_UCLK0 (1<<10)
#define S3C6400_UCON_UCLK1 (3<<10)
#define S3C2440_UCON2_FCLK_EN (1<<15)
#define S3C2440_UCON0_DIVMASK (15 << 12)
#define S3C2440_UCON1_DIVMASK (15 << 12)

10
drivers/serial/Kconfig
View File

@ -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,
@ -515,6 +515,14 @@ config SERIAL_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"
depends on MACH_DECSTATION && 32BIT

1
drivers/serial/Makefile
View File

@ -42,6 +42,7 @@ 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

151
drivers/serial/s3c6400.c Normal file
View File

@ -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");

8
drivers/serial/samsung.c
View File

@ -47,9 +47,9 @@
#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"
@ -756,6 +756,8 @@ 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;
}
@ -1034,8 +1036,8 @@ 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;

2
include/linux/serial_core.h
View File

@ -158,6 +158,8 @@
/* SH-SCI */
#define PORT_SCIFA 83
#define PORT_S3C6400 84
#ifdef __KERNEL__
#include <linux/compiler.h>