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s3c24a0.c
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/* linux/drivers/serial/s3c24a0.c
*
* Driver for Samsung S3C24A0 SoC onboard UARTs.
*
* Based on drivers/serial/s3c2410.c
*
* Author: Sandeep Patil <[email protected]>
*
* Ben Dooks, Copyright (c) 2003-2008 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_driver = {
.probe = s3c24a0_serial_probe,
.remove = __devexit_p(s3c24xx_serial_remove),
.driver = {
.name = "s3c24a0-uart",
.owner = THIS_MODULE,
},
};
s3c24xx_console_init(&s3c24a0_serial_driver, &s3c24a0_uart_inf);
static int __init s3c24a0_serial_init(void)
{
return s3c24xx_serial_init(&s3c24a0_serial_driver, &s3c24a0_uart_inf);
}
static void __exit s3c24a0_serial_exit(void)
{
platform_driver_unregister(&s3c24a0_serial_driver);
}
module_init(s3c24a0_serial_init);
module_exit(s3c24a0_serial_exit);