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Commit 1d4bab08 authored by Sandeep Patil's avatar Sandeep Patil Committed by Ben Dooks
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[ARM] S3C24A0: Serial port definitions and driver support. 



Add serial support for S3C24A0, based on current S3C2410
UART driver. It adds necessary new defines in regs-serial.h
for S3C24A0 and the code to support this device in
drivers/serial/s3c24a0.c

Signed-off-by: default avatarSandeep Patil <sandeep.patil@azingo.com>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent f0c9eb4e

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

+8 −0
Original line number Diff line number Diff line
@@ -149,6 +149,14 @@ 
#define S3C2410_UFSTAT_RXMASK	  (15<<0)

#define S3C2410_UFSTAT_RXSHIFT	  (0)



/* UFSTAT S3C24A0 */

#define S3C24A0_UFSTAT_TXFULL	  (1 << 14)

#define S3C24A0_UFSTAT_RXFULL	  (1 << 6)

#define S3C24A0_UFSTAT_TXMASK	  (63 << 8)

#define S3C24A0_UFSTAT_TXSHIFT	  (8)

#define S3C24A0_UFSTAT_RXMASK	  (63)

#define S3C24A0_UFSTAT_RXSHIFT	  (0)



/* UFSTAT S3C2443 same as S3C2440 */

#define S3C2440_UFSTAT_TXFULL	  (1<<14)

#define S3C2440_UFSTAT_RXFULL	  (1<<6)

drivers/serial/Kconfig

+6 −1
Original line number Diff line number Diff line
@@ -508,7 +508,12 @@ config SERIAL_S3C2440 
	help

	  Serial port support for the Samsung S3C2440 and S3C2442 SoC





config SERIAL_S3C24A0

	tristate "Samsung S3C24A0 Serial port support"

	depends on SERIAL_SAMSUNG && CPU_S3C24A0

	default y if CPU_S3C24A0

	help

	  Serial port support for the Samsung S3C24A0 SoC



config SERIAL_DZ

	bool "DECstation DZ serial driver"

drivers/serial/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ obj-$(CONFIG_SERIAL_S3C2400) += s3c2400.o 
obj-$(CONFIG_SERIAL_S3C2410) += s3c2410.o

obj-$(CONFIG_SERIAL_S3C2412) += s3c2412.o

obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o

obj-$(CONFIG_SERIAL_S3C24A0) += s3c24a0.o

obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o

obj-$(CONFIG_SERIAL_MUX) += mux.o

obj-$(CONFIG_SERIAL_68328) += 68328serial.o

drivers/serial/s3c24a0.c

0 → 100644
+118 −0
Original line number Diff line number Diff line 
/* linux/drivers/serial/s3c24a0.c

 *

 * Driver for Samsung S3C24A0 SoC onboard UARTs.

 *

 * Based on drivers/serial/s3c2410.c

 *

 * Author: Sandeep Patil <sandeep.patil@azingo.com>

 *

 * 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/platform_device.h>

#include <linux/init.h>

#include <linux/serial_core.h>

#include <linux/serial.h>

#include <linux/io.h>

#include <linux/irq.h>



#include <mach/hardware.h>



#include <plat/regs-serial.h>

#include <mach/regs-gpio.h>



#include "samsung.h"



static int s3c24a0_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 s3c24a0_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 s3c24a0_serial_resetport(struct uart_port *port,

				    struct s3c2410_uartcfg *cfg)

{

	dbg("s3c24a0_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 s3c24a0_uart_inf = {

	.name		= "Samsung S3C24A0 UART",

	.type		= PORT_S3C2410,

	.fifosize	= 16,

	.rx_fifomask	= S3C24A0_UFSTAT_RXMASK,

	.rx_fifoshift	= S3C24A0_UFSTAT_RXSHIFT,

	.rx_fifofull	= S3C24A0_UFSTAT_RXFULL,

	.tx_fifofull	= S3C24A0_UFSTAT_TXFULL,

	.tx_fifomask	= S3C24A0_UFSTAT_TXMASK,

	.tx_fifoshift	= S3C24A0_UFSTAT_TXSHIFT,

	.get_clksrc	= s3c24a0_serial_getsource,

	.set_clksrc	= s3c24a0_serial_setsource,

	.reset_port	= s3c24a0_serial_resetport,

};



static int s3c24a0_serial_probe(struct platform_device *dev)

{

	return s3c24xx_serial_probe(dev, &s3c24a0_uart_inf);

}



static struct platform_driver s3c24a0_serial_drv = {

	.probe		= s3c24a0_serial_probe,

	.remove		= s3c24xx_serial_remove,

	.driver		= {

		.name	= "s3c24a0-uart",

		.owner	= THIS_MODULE,

	},

};



s3c24xx_console_init(&s3c24a0_serial_drv, &s3c24a0_uart_inf);



static int __init s3c24a0_serial_init(void)

{

	return s3c24xx_serial_init(&s3c24a0_serial_drv, &s3c24a0_uart_inf);

}



static void __exit s3c24a0_serial_exit(void)

{

	platform_driver_unregister(&s3c24a0_serial_drv);

}



module_init(s3c24a0_serial_init);

module_exit(s3c24a0_serial_exit);

drivers/serial/samsung.c

+1 −1
Original line number Diff line number Diff line
@@ -61,7 +61,7 @@ 


/* we can support 3 uarts, but not always use them */



#ifdef CONFIG_CPU_S3C2400

#if defined(CONFIG_CPU_S3C2400) || defined(CONFIG_CPU_S3C24A0)

#define NR_PORTS (2)

#else

#define NR_PORTS (3)