/* 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);