155 lines
3.7 KiB
C
155 lines
3.7 KiB
C
/* 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>");
|