b497549a03
The S3C2410 serial driver in drivers/serial/s3c2410.c has been growing bigger with the addition of more variants of this hardware with the growing Samsung SoCs range. As such, it would be easier to split this code up into a core and per-cpu drivers to make driver addition easier, and the core smaller. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
118 lines
3 KiB
C
118 lines
3 KiB
C
/* linux/drivers/serial/s3c2410.c
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*
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* Driver for Samsung S3C2410 SoC onboard UARTs.
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*
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* Ben Dooks, Copyright (c) 2003-2005,2008 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/serial_core.h>
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#include <linux/serial.h>
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#include <asm/irq.h>
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#include <asm/hardware.h>
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#include <asm/plat-s3c/regs-serial.h>
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#include <asm/arch/regs-gpio.h>
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#include "samsung.h"
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static int s3c2410_serial_setsource(struct uart_port *port,
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struct s3c24xx_uart_clksrc *clk)
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{
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unsigned long ucon = rd_regl(port, S3C2410_UCON);
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if (strcmp(clk->name, "uclk") == 0)
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ucon |= S3C2410_UCON_UCLK;
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else
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ucon &= ~S3C2410_UCON_UCLK;
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wr_regl(port, S3C2410_UCON, ucon);
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return 0;
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}
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static int s3c2410_serial_getsource(struct uart_port *port,
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struct s3c24xx_uart_clksrc *clk)
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{
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unsigned long ucon = rd_regl(port, S3C2410_UCON);
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clk->divisor = 1;
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clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk";
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return 0;
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}
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static int s3c2410_serial_resetport(struct uart_port *port,
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struct s3c2410_uartcfg *cfg)
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{
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dbg("s3c2410_serial_resetport: port=%p (%08lx), cfg=%p\n",
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port, port->mapbase, cfg);
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wr_regl(port, S3C2410_UCON, cfg->ucon);
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wr_regl(port, S3C2410_ULCON, cfg->ulcon);
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/* reset both fifos */
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wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
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wr_regl(port, S3C2410_UFCON, cfg->ufcon);
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return 0;
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}
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static struct s3c24xx_uart_info s3c2410_uart_inf = {
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.name = "Samsung S3C2410 UART",
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.type = PORT_S3C2410,
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.fifosize = 16,
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.rx_fifomask = S3C2410_UFSTAT_RXMASK,
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.rx_fifoshift = S3C2410_UFSTAT_RXSHIFT,
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.rx_fifofull = S3C2410_UFSTAT_RXFULL,
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.tx_fifofull = S3C2410_UFSTAT_TXFULL,
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.tx_fifomask = S3C2410_UFSTAT_TXMASK,
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.tx_fifoshift = S3C2410_UFSTAT_TXSHIFT,
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.get_clksrc = s3c2410_serial_getsource,
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.set_clksrc = s3c2410_serial_setsource,
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.reset_port = s3c2410_serial_resetport,
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};
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static int s3c2410_serial_probe(struct platform_device *dev)
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{
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return s3c24xx_serial_probe(dev, &s3c2410_uart_inf);
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}
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static struct platform_driver s3c2410_serial_drv = {
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.probe = s3c2410_serial_probe,
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.remove = s3c24xx_serial_remove,
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.driver = {
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.name = "s3c2410-uart",
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.owner = THIS_MODULE,
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},
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};
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s3c24xx_console_init(&s3c2410_serial_drv, &s3c2410_uart_inf);
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static int __init s3c2410_serial_init(void)
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{
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return s3c24xx_serial_init(&s3c2410_serial_drv, &s3c2410_uart_inf);
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}
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static void __exit s3c2410_serial_exit(void)
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{
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platform_driver_unregister(&s3c2410_serial_drv);
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}
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module_init(s3c2410_serial_init);
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module_exit(s3c2410_serial_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
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MODULE_DESCRIPTION("Samsung S3C2410 SoC Serial port driver");
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MODULE_ALIAS("platform:s3c2410-uart");
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