[net-next-2.6.git] / drivers / serial / s5pv210.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)
{
	struct s3c2410_uartcfg *cfg = port->dev->platform_data;
	unsigned long ucon = rd_regl(port, S3C2410_UCON);

	if ((cfg->clocks_size) == 1)
		return 0;

	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)
{
	struct s3c2410_uartcfg *cfg = port->dev->platform_data;
	u32 ucon = rd_regl(port, S3C2410_UCON);

	clk->divisor = 1;

	if ((cfg->clocks_size) == 1)
		return 0;

	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_driver = {
	.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_driver, s5p_uart_inf);
}

console_initcall(s5pv210_serial_console_init);

static int __init s5p_serial_init(void)
{
	return s3c24xx_serial_init(&s5p_serial_driver, *s5p_uart_inf);
}

static void __exit s5p_serial_exit(void)
{
	platform_driver_unregister(&s5p_serial_driver);
}

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>");
Commit	Line	Data
d8512731 TA	1	/* linux/drivers/serial/s5pv210.c
	2	*
	3	* Copyright (c) 2010 Samsung Electronics Co., Ltd.
	4	* http://www.samsung.com/
	5	*
	6	* Based on drivers/serial/s3c6400.c
	7	*
	8	* Driver for Samsung S5PV210 SoC UARTs.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/ioport.h>
	17	#include <linux/io.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/init.h>
	20	#include <linux/serial_core.h>
	21	#include <linux/serial.h>
	22
	23	#include <asm/irq.h>
	24	#include <mach/hardware.h>
	25	#include <plat/regs-serial.h>
	26	#include "samsung.h"
	27
	28	static int s5pv210_serial_setsource(struct uart_port *port,
	29	struct s3c24xx_uart_clksrc *clk)
	30	{
acfdc56d	31	struct s3c2410_uartcfg *cfg = port->dev->platform_data;
d8512731 TA	32	unsigned long ucon = rd_regl(port, S3C2410_UCON);
d8512731 TA	33
acfdc56d JL	34	if ((cfg->clocks_size) == 1)
	35	return 0;
	36
d8512731 TA	37	if (strcmp(clk->name, "pclk") == 0)
	38	ucon &= ~S5PV210_UCON_CLKMASK;
	39	else if (strcmp(clk->name, "uclk1") == 0)
	40	ucon \|= S5PV210_UCON_CLKMASK;
	41	else {
	42	printk(KERN_ERR "unknown clock source %s\n", clk->name);
	43	return -EINVAL;
	44	}
	45
	46	wr_regl(port, S3C2410_UCON, ucon);
	47	return 0;
	48	}
	49
	50
	51	static int s5pv210_serial_getsource(struct uart_port *port,
	52	struct s3c24xx_uart_clksrc *clk)
	53	{
acfdc56d	54	struct s3c2410_uartcfg *cfg = port->dev->platform_data;
d8512731 TA	55	u32 ucon = rd_regl(port, S3C2410_UCON);
	56
	57	clk->divisor = 1;
	58
acfdc56d JL	59	if ((cfg->clocks_size) == 1)
	60	return 0;
	61
d8512731 TA	62	switch (ucon & S5PV210_UCON_CLKMASK) {
	63	case S5PV210_UCON_PCLK:
	64	clk->name = "pclk";
	65	break;
	66	case S5PV210_UCON_UCLK:
	67	clk->name = "uclk1";
	68	break;
	69	}
	70
	71	return 0;
	72	}
	73
	74	static int s5pv210_serial_resetport(struct uart_port *port,
	75	struct s3c2410_uartcfg *cfg)
	76	{
	77	unsigned long ucon = rd_regl(port, S3C2410_UCON);
	78
	79	ucon &= S5PV210_UCON_CLKMASK;
	80	wr_regl(port, S3C2410_UCON, ucon \| cfg->ucon);
	81	wr_regl(port, S3C2410_ULCON, cfg->ulcon);
	82
	83	/* reset both fifos */
	84	wr_regl(port, S3C2410_UFCON, cfg->ufcon \| S3C2410_UFCON_RESETBOTH);
	85	wr_regl(port, S3C2410_UFCON, cfg->ufcon);
	86
	87	return 0;
	88	}
	89
	90	#define S5PV210_UART_DEFAULT_INFO(fifo_size) \
	91	.name = "Samsung S5PV210 UART0", \
	92	.type = PORT_S3C6400, \
	93	.fifosize = fifo_size, \
	94	.has_divslot = 1, \
	95	.rx_fifomask = S5PV210_UFSTAT_RXMASK, \
	96	.rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \
	97	.rx_fifofull = S5PV210_UFSTAT_RXFULL, \
	98	.tx_fifofull = S5PV210_UFSTAT_TXFULL, \
	99	.tx_fifomask = S5PV210_UFSTAT_TXMASK, \
	100	.tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, \
	101	.get_clksrc = s5pv210_serial_getsource, \
	102	.set_clksrc = s5pv210_serial_setsource, \
	103	.reset_port = s5pv210_serial_resetport
	104
	105	static struct s3c24xx_uart_info s5p_port_fifo256 = {
	106	S5PV210_UART_DEFAULT_INFO(256),
	107	};
	108
	109	static struct s3c24xx_uart_info s5p_port_fifo64 = {
	110	S5PV210_UART_DEFAULT_INFO(64),
	111	};
	112
	113	static struct s3c24xx_uart_info s5p_port_fifo16 = {
	114	S5PV210_UART_DEFAULT_INFO(16),
	115	};
	116
	117	static struct s3c24xx_uart_info *s5p_uart_inf[] = {
	118	[0] = &s5p_port_fifo256,
	119	[1] = &s5p_port_fifo64,
	120	[2] = &s5p_port_fifo16,
	121	[3] = &s5p_port_fifo16,
	122	};
	123
	124	/* device management */
	125	static int s5p_serial_probe(struct platform_device *pdev)
126	{
127	return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]);
128	}
129
5d66ceee	130	static struct platform_driver s5p_serial_driver = {
d8512731 TA	131	.probe = s5p_serial_probe,
	132	.remove = __devexit_p(s3c24xx_serial_remove),
	133	.driver = {
	134	.name = "s5pv210-uart",
	135	.owner = THIS_MODULE,
	136	},
	137	};
	138
	139	static int __init s5pv210_serial_console_init(void)
	140	{
5d66ceee	141	return s3c24xx_serial_initconsole(&s5p_serial_driver, s5p_uart_inf);
d8512731 TA	142	}
	143
	144	console_initcall(s5pv210_serial_console_init);
	145
	146	static int __init s5p_serial_init(void)
	147	{
5d66ceee	148	return s3c24xx_serial_init(&s5p_serial_driver, *s5p_uart_inf);
d8512731 TA	149	}
	150
	151	static void __exit s5p_serial_exit(void)
	152	{
5d66ceee	153	platform_driver_unregister(&s5p_serial_driver);
d8512731 TA	154	}
	155
	156	module_init(s5p_serial_init);
	157	module_exit(s5p_serial_exit);
	158
	159	MODULE_LICENSE("GPL");
	160	MODULE_ALIAS("platform:s5pv210-uart");
	161	MODULE_DESCRIPTION("Samsung S5PV210 UART Driver support");
	162	MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");