diff options
author | Sandeep Patil <sandeep.patil@azingo.com> | 2008-10-21 17:06:30 +0400 |
---|---|---|
committer | Ben Dooks <ben-linux@fluff.org> | 2008-12-16 00:46:36 +0300 |
commit | 1d4bab082474d539f900e896880aa2135e0f5393 (patch) | |
tree | 277e991e7994a5b28a894f66c7582e59b6d9c1aa /drivers/serial/s3c24a0.c | |
parent | f0c9eb4ec2d3c9f4ddd74b75da6dfc137e0f6b0d (diff) | |
download | linux-1d4bab082474d539f900e896880aa2135e0f5393.tar.xz |
[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: Sandeep Patil <sandeep.patil@azingo.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'drivers/serial/s3c24a0.c')
-rw-r--r-- | drivers/serial/s3c24a0.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/serial/s3c24a0.c b/drivers/serial/s3c24a0.c new file mode 100644 index 000000000000..ebf2fd3c8f7d --- /dev/null +++ b/drivers/serial/s3c24a0.c @@ -0,0 +1,118 @@ +/* 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); + |