[ARM] S3C24A0: Serial port definitions and driver support. (1d4bab08) · Commits · 戴 / test

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

+8 −0

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		@@ -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

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		@@ -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

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		@@ -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

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		@@ -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)

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