[net-next-2.6.git] / drivers / serial / s3c2400.c

/* linux/drivers/serial/s3c240.c
 *
 * Driver for Samsung SoC onboard UARTs.
 *
 * Ben Dooks, Copyright (c) 2003-2005 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/io.h>
#include <linux/platform_device.h>

#include <asm/irq.h>

#include <mach/hardware.h>

#include <plat/regs-serial.h>
#include <mach/regs-gpio.h>

#include "samsung.h"

static int s3c2400_serial_getsource(struct uart_port *port,
				    struct s3c24xx_uart_clksrc *clk)
{
	clk->divisor = 1;
	clk->name = "pclk";

	return 0;
}

static int s3c2400_serial_setsource(struct uart_port *port,
				    struct s3c24xx_uart_clksrc *clk)
{
	return 0;
}

static int s3c2400_serial_resetport(struct uart_port *port,
				    struct s3c2410_uartcfg *cfg)
{
	dbg("s3c2400_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 s3c2400_uart_inf = {
	.name		= "Samsung S3C2400 UART",
	.type		= PORT_S3C2400,
	.fifosize	= 16,
	.rx_fifomask	= S3C2410_UFSTAT_RXMASK,
	.rx_fifoshift	= S3C2410_UFSTAT_RXSHIFT,
	.rx_fifofull	= S3C2410_UFSTAT_RXFULL,
	.tx_fifofull	= S3C2410_UFSTAT_TXFULL,
	.tx_fifomask	= S3C2410_UFSTAT_TXMASK,
	.tx_fifoshift	= S3C2410_UFSTAT_TXSHIFT,
	.get_clksrc	= s3c2400_serial_getsource,
	.set_clksrc	= s3c2400_serial_setsource,
	.reset_port	= s3c2400_serial_resetport,
};

static int s3c2400_serial_probe(struct platform_device *dev)
{
	return s3c24xx_serial_probe(dev, &s3c2400_uart_inf);
}

static struct platform_driver s3c2400_serial_driver = {
	.probe		= s3c2400_serial_probe,
	.remove		= __devexit_p(s3c24xx_serial_remove),
	.driver		= {
		.name	= "s3c2400-uart",
		.owner	= THIS_MODULE,
	},
};

s3c24xx_console_init(&s3c2400_serial_driver, &s3c2400_uart_inf);

static inline int s3c2400_serial_init(void)
{
	return s3c24xx_serial_init(&s3c2400_serial_driver, &s3c2400_uart_inf);
}

static inline void s3c2400_serial_exit(void)
{
	platform_driver_unregister(&s3c2400_serial_driver);
}

module_init(s3c2400_serial_init);
module_exit(s3c2400_serial_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("Samsung S3C2400 SoC Serial port driver");
MODULE_ALIAS("platform:s3c2400-uart");
Commit	Line	Data
b497549a BD	1	/* linux/drivers/serial/s3c240.c
	2	*
	3	* Driver for Samsung SoC onboard UARTs.
	4	*
	5	* Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics
	6	* http://armlinux.simtec.co.uk/
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/ioport.h>
	15	#include <linux/io.h>
	16	#include <linux/platform_device.h>
	17
	18	#include <asm/irq.h>
	19
a09e64fb	20	#include <mach/hardware.h>
b497549a	21
a2b7ba9c	22	#include <plat/regs-serial.h>
a09e64fb	23	#include <mach/regs-gpio.h>
b497549a BD	24
	25	#include "samsung.h"
	26
	27	static int s3c2400_serial_getsource(struct uart_port *port,
	28	struct s3c24xx_uart_clksrc *clk)
	29	{
	30	clk->divisor = 1;
	31	clk->name = "pclk";
	32
	33	return 0;
	34	}
	35
	36	static int s3c2400_serial_setsource(struct uart_port *port,
	37	struct s3c24xx_uart_clksrc *clk)
	38	{
	39	return 0;
	40	}
	41
	42	static int s3c2400_serial_resetport(struct uart_port *port,
	43	struct s3c2410_uartcfg *cfg)
	44	{
	45	dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n",
	46	port, port->mapbase, cfg);
	47
	48	wr_regl(port, S3C2410_UCON, cfg->ucon);
	49	wr_regl(port, S3C2410_ULCON, cfg->ulcon);
	50
	51	/* reset both fifos */
	52
	53	wr_regl(port, S3C2410_UFCON, cfg->ufcon \| S3C2410_UFCON_RESETBOTH);
	54	wr_regl(port, S3C2410_UFCON, cfg->ufcon);
	55
	56	return 0;
	57	}
	58
	59	static struct s3c24xx_uart_info s3c2400_uart_inf = {
	60	.name = "Samsung S3C2400 UART",
	61	.type = PORT_S3C2400,
	62	.fifosize = 16,
	63	.rx_fifomask = S3C2410_UFSTAT_RXMASK,
	64	.rx_fifoshift = S3C2410_UFSTAT_RXSHIFT,
	65	.rx_fifofull = S3C2410_UFSTAT_RXFULL,
	66	.tx_fifofull = S3C2410_UFSTAT_TXFULL,
	67	.tx_fifomask = S3C2410_UFSTAT_TXMASK,
	68	.tx_fifoshift = S3C2410_UFSTAT_TXSHIFT,
	69	.get_clksrc = s3c2400_serial_getsource,
	70	.set_clksrc = s3c2400_serial_setsource,
	71	.reset_port = s3c2400_serial_resetport,
	72	};
	73
	74	static int s3c2400_serial_probe(struct platform_device *dev)
	75	{
	76	return s3c24xx_serial_probe(dev, &s3c2400_uart_inf);
	77	}
	78
8fe70a5f	79	static struct platform_driver s3c2400_serial_driver = {
b497549a	80	.probe = s3c2400_serial_probe,
90ceb964	81	.remove = __devexit_p(s3c24xx_serial_remove),
b497549a BD	82	.driver = {
	83	.name = "s3c2400-uart",
	84	.owner = THIS_MODULE,
	85	},
	86	};
	87
8fe70a5f	88	s3c24xx_console_init(&s3c2400_serial_driver, &s3c2400_uart_inf);
b497549a BD	89
	90	static inline int s3c2400_serial_init(void)
	91	{
8fe70a5f	92	return s3c24xx_serial_init(&s3c2400_serial_driver, &s3c2400_uart_inf);
b497549a BD	93	}
	94
	95	static inline void s3c2400_serial_exit(void)
	96	{
8fe70a5f	97	platform_driver_unregister(&s3c2400_serial_driver);
b497549a BD	98	}
	99
	100	module_init(s3c2400_serial_init);
	101	module_exit(s3c2400_serial_exit);
	102
	103	MODULE_LICENSE("GPL v2");
	104	MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
	105	MODULE_DESCRIPTION("Samsung S3C2400 SoC Serial port driver");
	106	MODULE_ALIAS("platform:s3c2400-uart");