[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)
{
	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_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	{
	31	unsigned long ucon = rd_regl(port, S3C2410_UCON);
	32
	33	if (strcmp(clk->name, "pclk") == 0)
	34	ucon &= ~S5PV210_UCON_CLKMASK;
	35	else if (strcmp(clk->name, "uclk1") == 0)
	36	ucon \|= S5PV210_UCON_CLKMASK;
	37	else {
	38	printk(KERN_ERR "unknown clock source %s\n", clk->name);
	39	return -EINVAL;
	40	}
	41
	42	wr_regl(port, S3C2410_UCON, ucon);
	43	return 0;
	44	}
	45
	46
	47	static int s5pv210_serial_getsource(struct uart_port *port,
	48	struct s3c24xx_uart_clksrc *clk)
	49	{
	50	u32 ucon = rd_regl(port, S3C2410_UCON);
	51
	52	clk->divisor = 1;
	53
	54	switch (ucon & S5PV210_UCON_CLKMASK) {
	55	case S5PV210_UCON_PCLK:
	56	clk->name = "pclk";
	57	break;
	58	case S5PV210_UCON_UCLK:
	59	clk->name = "uclk1";
	60	break;
	61	}
	62
	63	return 0;
	64	}
65
66	static int s5pv210_serial_resetport(struct uart_port *port,
67	struct s3c2410_uartcfg *cfg)
68	{
69	unsigned long ucon = rd_regl(port, S3C2410_UCON);
70
71	ucon &= S5PV210_UCON_CLKMASK;
72	wr_regl(port, S3C2410_UCON, ucon \| cfg->ucon);
73	wr_regl(port, S3C2410_ULCON, cfg->ulcon);
74
75	/* reset both fifos */
76	wr_regl(port, S3C2410_UFCON, cfg->ufcon \| S3C2410_UFCON_RESETBOTH);
77	wr_regl(port, S3C2410_UFCON, cfg->ufcon);
78
79	return 0;
80	}
81
82	#define S5PV210_UART_DEFAULT_INFO(fifo_size) \
83	.name = "Samsung S5PV210 UART0", \
84	.type = PORT_S3C6400, \
85	.fifosize = fifo_size, \
86	.has_divslot = 1, \
87	.rx_fifomask = S5PV210_UFSTAT_RXMASK, \
88	.rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \
89	.rx_fifofull = S5PV210_UFSTAT_RXFULL, \
90	.tx_fifofull = S5PV210_UFSTAT_TXFULL, \
91	.tx_fifomask = S5PV210_UFSTAT_TXMASK, \
92	.tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, \
93	.get_clksrc = s5pv210_serial_getsource, \
94	.set_clksrc = s5pv210_serial_setsource, \
95	.reset_port = s5pv210_serial_resetport
96
97	static struct s3c24xx_uart_info s5p_port_fifo256 = {
98	S5PV210_UART_DEFAULT_INFO(256),
99	};
100
101	static struct s3c24xx_uart_info s5p_port_fifo64 = {
102	S5PV210_UART_DEFAULT_INFO(64),
103	};
104
105	static struct s3c24xx_uart_info s5p_port_fifo16 = {
106	S5PV210_UART_DEFAULT_INFO(16),
107	};
108
109	static struct s3c24xx_uart_info *s5p_uart_inf[] = {
110	[0] = &s5p_port_fifo256,
111	[1] = &s5p_port_fifo64,
112	[2] = &s5p_port_fifo16,
113	[3] = &s5p_port_fifo16,
114	};
115
116	/* device management */
117	static int s5p_serial_probe(struct platform_device *pdev)
118	{
119	return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]);
120	}
121
5d66ceee	122	static struct platform_driver s5p_serial_driver = {
d8512731 TA	123	.probe = s5p_serial_probe,
	124	.remove = __devexit_p(s3c24xx_serial_remove),
	125	.driver = {
	126	.name = "s5pv210-uart",
	127	.owner = THIS_MODULE,
	128	},
	129	};
	130
	131	static int __init s5pv210_serial_console_init(void)
	132	{
5d66ceee	133	return s3c24xx_serial_initconsole(&s5p_serial_driver, s5p_uart_inf);
d8512731 TA	134	}
	135
	136	console_initcall(s5pv210_serial_console_init);
	137
	138	static int __init s5p_serial_init(void)
	139	{
5d66ceee	140	return s3c24xx_serial_init(&s5p_serial_driver, *s5p_uart_inf);
d8512731 TA	141	}
	142
	143	static void __exit s5p_serial_exit(void)
	144	{
5d66ceee	145	platform_driver_unregister(&s5p_serial_driver);
d8512731 TA	146	}
	147
	148	module_init(s5p_serial_init);
	149	module_exit(s5p_serial_exit);
	150
	151	MODULE_LICENSE("GPL");
	152	MODULE_ALIAS("platform:s5pv210-uart");
	153	MODULE_DESCRIPTION("Samsung S5PV210 UART Driver support");
	154	MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");