[mirror_ubuntu-artful-kernel.git] / drivers / serial / s3c2410.c

/* linux/drivers/serial/s3c2410.c
 *
 * Driver for Samsung S3C2410 SoC onboard UARTs.
 *
 * Ben Dooks, Copyright (c) 2003-2005,2008 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/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 <asm/hardware.h>

#include <asm/plat-s3c/regs-serial.h>
#include <asm/arch/regs-gpio.h>

#include "samsung.h"

static int s3c2410_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 s3c2410_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 s3c2410_serial_resetport(struct uart_port *port,
				    struct s3c2410_uartcfg *cfg)
{
	dbg("s3c2410_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 s3c2410_uart_inf = {
	.name		= "Samsung S3C2410 UART",
	.type		= PORT_S3C2410,
	.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	= s3c2410_serial_getsource,
	.set_clksrc	= s3c2410_serial_setsource,
	.reset_port	= s3c2410_serial_resetport,
};

static int s3c2410_serial_probe(struct platform_device *dev)
{
	return s3c24xx_serial_probe(dev, &s3c2410_uart_inf);
}

static struct platform_driver s3c2410_serial_drv = {
	.probe		= s3c2410_serial_probe,
	.remove		= s3c24xx_serial_remove,
	.driver		= {
		.name	= "s3c2410-uart",
		.owner	= THIS_MODULE,
	},
};

s3c24xx_console_init(&s3c2410_serial_drv, &s3c2410_uart_inf);

static int __init s3c2410_serial_init(void)
{
	return s3c24xx_serial_init(&s3c2410_serial_drv, &s3c2410_uart_inf);
}

static void __exit s3c2410_serial_exit(void)
{
	platform_driver_unregister(&s3c2410_serial_drv);
}

module_init(s3c2410_serial_init);
module_exit(s3c2410_serial_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("Samsung S3C2410 SoC Serial port driver");
MODULE_ALIAS("platform:s3c2410-uart");
Commit	Line	Data
05a78966	1	/* linux/drivers/serial/s3c2410.c
1da177e4	2	*
b497549a	3	* Driver for Samsung S3C2410 SoC onboard UARTs.
1da177e4	4	*
b497549a	5	* Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics
05a78966	6	* http://armlinux.simtec.co.uk/
8fe059df BD	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.
1da177e4 LT	11	*/
1da177e4 LT	12
b497549a BD	13	#include <linux/module.h>
	14	#include <linux/ioport.h>
	15	#include <linux/io.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/init.h>
	18	#include <linux/serial_core.h>
	19	#include <linux/serial.h>
1da177e4	20
b497549a BD	21	#include <asm/irq.h>
b497549a BD	22	#include <asm/hardware.h>
1da177e4	23
b497549a BD	24	#include <asm/plat-s3c/regs-serial.h>
b497549a BD	25	#include <asm/arch/regs-gpio.h>
1da177e4	26
b497549a	27	#include "samsung.h"
1da177e4 LT	28
	29	static int s3c2410_serial_setsource(struct uart_port *port,
	30	struct s3c24xx_uart_clksrc *clk)
	31	{
	32	unsigned long ucon = rd_regl(port, S3C2410_UCON);
	33
	34	if (strcmp(clk->name, "uclk") == 0)
	35	ucon \|= S3C2410_UCON_UCLK;
	36	else
	37	ucon &= ~S3C2410_UCON_UCLK;
	38
	39	wr_regl(port, S3C2410_UCON, ucon);
	40	return 0;
	41	}
	42
	43	static int s3c2410_serial_getsource(struct uart_port *port,
	44	struct s3c24xx_uart_clksrc *clk)
	45	{
	46	unsigned long ucon = rd_regl(port, S3C2410_UCON);
	47
	48	clk->divisor = 1;
	49	clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk";
	50
	51	return 0;
	52	}
	53
	54	static int s3c2410_serial_resetport(struct uart_port *port,
	55	struct s3c2410_uartcfg *cfg)
	56	{
	57	dbg("s3c2410_serial_resetport: port=%p (%08lx), cfg=%p\n",
	58	port, port->mapbase, cfg);
	59
	60	wr_regl(port, S3C2410_UCON, cfg->ucon);
	61	wr_regl(port, S3C2410_ULCON, cfg->ulcon);
	62
	63	/* reset both fifos */
	64
	65	wr_regl(port, S3C2410_UFCON, cfg->ufcon \| S3C2410_UFCON_RESETBOTH);
	66	wr_regl(port, S3C2410_UFCON, cfg->ufcon);
	67
	68	return 0;
	69	}
	70
	71	static struct s3c24xx_uart_info s3c2410_uart_inf = {
	72	.name = "Samsung S3C2410 UART",
	73	.type = PORT_S3C2410,
	74	.fifosize = 16,
	75	.rx_fifomask = S3C2410_UFSTAT_RXMASK,
	76	.rx_fifoshift = S3C2410_UFSTAT_RXSHIFT,
	77	.rx_fifofull = S3C2410_UFSTAT_RXFULL,
	78	.tx_fifofull = S3C2410_UFSTAT_TXFULL,
	79	.tx_fifomask = S3C2410_UFSTAT_TXMASK,
	80	.tx_fifoshift = S3C2410_UFSTAT_TXSHIFT,
	81	.get_clksrc = s3c2410_serial_getsource,
	82	.set_clksrc = s3c2410_serial_setsource,
	83	.reset_port = s3c2410_serial_resetport,
	84	};
	85
3ae5eaec	86	static int s3c2410_serial_probe(struct platform_device *dev)
1da177e4 LT	87	{
	88	return s3c24xx_serial_probe(dev, &s3c2410_uart_inf);
	89	}
	90
3ae5eaec	91	static struct platform_driver s3c2410_serial_drv = {
1da177e4 LT	92	.probe = s3c2410_serial_probe,
1da177e4 LT	93	.remove = s3c24xx_serial_remove,
3ae5eaec RK	94	.driver = {
	95	.name = "s3c2410-uart",
	96	.owner = THIS_MODULE,
	97	},
1da177e4 LT	98	};
1da177e4 LT	99
b497549a BD	100	s3c24xx_console_init(&s3c2410_serial_drv, &s3c2410_uart_inf);
	101
	102	static int __init s3c2410_serial_init(void)
1da177e4 LT	103	{
	104	return s3c24xx_serial_init(&s3c2410_serial_drv, &s3c2410_uart_inf);
	105	}
	106
b497549a	107	static void __exit s3c2410_serial_exit(void)
1da177e4	108	{
3ae5eaec	109	platform_driver_unregister(&s3c2410_serial_drv);
1da177e4 LT	110	}
1da177e4 LT	111
b497549a BD	112	module_init(s3c2410_serial_init);
b497549a BD	113	module_exit(s3c2410_serial_exit);
1da177e4	114
8fe059df	115	MODULE_LICENSE("GPL v2");
1da177e4	116	MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
b497549a	117	MODULE_DESCRIPTION("Samsung S3C2410 SoC Serial port driver");
e169c139	118	MODULE_ALIAS("platform:s3c2410-uart");