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Commit d8512731 authored by Thomas Abraham's avatar Thomas Abraham Committed by Ben Dooks
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ARM: S5PV210: Add serial port support 



This patch adds UART serial port support for S5PV210.

Signed-off-by: default avatarThomas Abraham <thomas.ab@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent 0647aee0

arch/arm/plat-s3c/include/plat/regs-serial.h

+30 −0
Original line number Diff line number Diff line
@@ -194,6 +194,36 @@ 
#define S3C64XX_UINTSP		0x34

#define S3C64XX_UINTM		0x38



/* Following are specific to S5PV210 and S5P6442 */

#define S5PV210_UCON_CLKMASK	(1<<10)

#define S5PV210_UCON_PCLK	(0<<10)

#define S5PV210_UCON_UCLK	(1<<10)



#define S5PV210_UFCON_TXTRIG0	(0<<8)

#define S5PV210_UFCON_TXTRIG4	(1<<8)

#define S5PV210_UFCON_TXTRIG8	(2<<8)

#define S5PV210_UFCON_TXTRIG16	(3<<8)

#define S5PV210_UFCON_TXTRIG32	(4<<8)

#define S5PV210_UFCON_TXTRIG64	(5<<8)

#define S5PV210_UFCON_TXTRIG128 (6<<8)

#define S5PV210_UFCON_TXTRIG256 (7<<8)



#define S5PV210_UFCON_RXTRIG1	(0<<4)

#define S5PV210_UFCON_RXTRIG4	(1<<4)

#define S5PV210_UFCON_RXTRIG8	(2<<4)

#define S5PV210_UFCON_RXTRIG16	(3<<4)

#define S5PV210_UFCON_RXTRIG32	(4<<4)

#define S5PV210_UFCON_RXTRIG64	(5<<4)

#define S5PV210_UFCON_RXTRIG128	(6<<4)

#define S5PV210_UFCON_RXTRIG256	(7<<4)



#define S5PV210_UFSTAT_TXFULL	(1<<24)

#define S5PV210_UFSTAT_RXFULL	(1<<8)

#define S5PV210_UFSTAT_TXMASK	(255<<16)

#define S5PV210_UFSTAT_TXSHIFT	(16)

#define S5PV210_UFSTAT_RXMASK	(255<<0)

#define S5PV210_UFSTAT_RXSHIFT	(0)



#ifndef __ASSEMBLY__



/* struct s3c24xx_uart_clksrc

drivers/serial/Kconfig

+8 −1
Original line number Diff line number Diff line
@@ -459,7 +459,7 @@ config SERIAL_SAMSUNG_UARTS 
	int

	depends on ARM && PLAT_S3C

	default 2 if ARCH_S3C2400

	default 4 if ARCH_S5P6440 || ARCH_S5PC1XX || ARCH_S3C64XX || CPU_S3C2443

	default 4 if ARCH_S5P6440 || ARCH_S5PC1XX || ARCH_S5PV210 || ARCH_S3C64XX || CPU_S3C2443

	default 3

	help

	  Select the number of available UART ports for the Samsung S3C
@@ -540,6 +540,13 @@ config SERIAL_S5PC100 
	help

	  Serial port support for the Samsung S5PC100 SoCs



config SERIAL_S5PV210

	tristate "Samsung S5PV210 Serial port support"

	depends on SERIAL_SAMSUNG && CPU_S5PV210

	default y

	help

	  Serial port support for Samsung's S5P Family of SoC's



config SERIAL_MAX3100

	tristate "MAX3100 support"

	depends on SPI

drivers/serial/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o 
obj-$(CONFIG_SERIAL_S3C24A0) += s3c24a0.o

obj-$(CONFIG_SERIAL_S3C6400) += s3c6400.o

obj-$(CONFIG_SERIAL_S5PC100) += s3c6400.o

obj-$(CONFIG_SERIAL_S5PV210) += s5pv210.o

obj-$(CONFIG_SERIAL_MAX3100) += max3100.o

obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o

obj-$(CONFIG_SERIAL_MUX) += mux.o

drivers/serial/s5pv210.c

0 → 100644
+154 −0
Original line number Diff line number Diff line 
/* 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_drv = {

	.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_drv, s5p_uart_inf);

}



console_initcall(s5pv210_serial_console_init);



static int __init s5p_serial_init(void)

{

	return s3c24xx_serial_init(&s5p_serial_drv, *s5p_uart_inf);

}



static void __exit s5p_serial_exit(void)

{

	platform_driver_unregister(&s5p_serial_drv);

}



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>");