ARM: S5PV210: Add serial port support
This patch adds UART serial port support for S5PV210.
Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/drivers/serial/s5pv210.c b/drivers/serial/s5pv210.c
new file mode 100644
index 0000000..8dc0383
--- /dev/null
+++ b/drivers/serial/s5pv210.c
@@ -0,0 +1,154 @@
+/* linux/drivers/serial/s5pv210.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Based on drivers/serial/s3c6400.c
+ *
+ * Driver for Samsung S5PV210 SoC UARTs.
+ *
+ * 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/io.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/serial_core.h>
+#include <linux/serial.h>
+
+#include <asm/irq.h>
+#include <mach/hardware.h>
+#include <plat/regs-serial.h>
+#include "samsung.h"
+
+static int s5pv210_serial_setsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ if (strcmp(clk->name, "pclk") == 0)
+ ucon &= ~S5PV210_UCON_CLKMASK;
+ else if (strcmp(clk->name, "uclk1") == 0)
+ ucon |= S5PV210_UCON_CLKMASK;
+ else {
+ printk(KERN_ERR "unknown clock source %s\n", clk->name);
+ return -EINVAL;
+ }
+
+ wr_regl(port, S3C2410_UCON, ucon);
+ return 0;
+}
+
+
+static int s5pv210_serial_getsource(struct uart_port *port,
+ struct s3c24xx_uart_clksrc *clk)
+{
+ u32 ucon = rd_regl(port, S3C2410_UCON);
+
+ clk->divisor = 1;
+
+ switch (ucon & S5PV210_UCON_CLKMASK) {
+ case S5PV210_UCON_PCLK:
+ clk->name = "pclk";
+ break;
+ case S5PV210_UCON_UCLK:
+ clk->name = "uclk1";
+ break;
+ }
+
+ return 0;
+}
+
+static int s5pv210_serial_resetport(struct uart_port *port,
+ struct s3c2410_uartcfg *cfg)
+{
+ unsigned long ucon = rd_regl(port, S3C2410_UCON);
+
+ ucon &= S5PV210_UCON_CLKMASK;
+ wr_regl(port, S3C2410_UCON, 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;
+}
+
+#define S5PV210_UART_DEFAULT_INFO(fifo_size) \
+ .name = "Samsung S5PV210 UART0", \
+ .type = PORT_S3C6400, \
+ .fifosize = fifo_size, \
+ .has_divslot = 1, \
+ .rx_fifomask = S5PV210_UFSTAT_RXMASK, \
+ .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \
+ .rx_fifofull = S5PV210_UFSTAT_RXFULL, \
+ .tx_fifofull = S5PV210_UFSTAT_TXFULL, \
+ .tx_fifomask = S5PV210_UFSTAT_TXMASK, \
+ .tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, \
+ .get_clksrc = s5pv210_serial_getsource, \
+ .set_clksrc = s5pv210_serial_setsource, \
+ .reset_port = s5pv210_serial_resetport
+
+static struct s3c24xx_uart_info s5p_port_fifo256 = {
+ S5PV210_UART_DEFAULT_INFO(256),
+};
+
+static struct s3c24xx_uart_info s5p_port_fifo64 = {
+ S5PV210_UART_DEFAULT_INFO(64),
+};
+
+static struct s3c24xx_uart_info s5p_port_fifo16 = {
+ S5PV210_UART_DEFAULT_INFO(16),
+};
+
+static struct s3c24xx_uart_info *s5p_uart_inf[] = {
+ [0] = &s5p_port_fifo256,
+ [1] = &s5p_port_fifo64,
+ [2] = &s5p_port_fifo16,
+ [3] = &s5p_port_fifo16,
+};
+
+/* device management */
+static int s5p_serial_probe(struct platform_device *pdev)
+{
+ return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]);
+}
+
+static struct platform_driver s5p_serial_drv = {
+ .probe = s5p_serial_probe,
+ .remove = __devexit_p(s3c24xx_serial_remove),
+ .driver = {
+ .name = "s5pv210-uart",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init s5pv210_serial_console_init(void)
+{
+ return s3c24xx_serial_initconsole(&s5p_serial_drv, s5p_uart_inf);
+}
+
+console_initcall(s5pv210_serial_console_init);
+
+static int __init s5p_serial_init(void)
+{
+ return s3c24xx_serial_init(&s5p_serial_drv, *s5p_uart_inf);
+}
+
+static void __exit s5p_serial_exit(void)
+{
+ platform_driver_unregister(&s5p_serial_drv);
+}
+
+module_init(s5p_serial_init);
+module_exit(s5p_serial_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s5pv210-uart");
+MODULE_DESCRIPTION("Samsung S5PV210 UART Driver support");
+MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");