[PATCH v3 9/9] ARM: S5PV210: Add serial port support
Kukjin Kim
kgene.kim at samsung.com
Thu Jan 21 19:22:34 EST 2010
This patch adds UART serial port support for S5PV210.
Signed-off-by: Thomas Abraham <thomas.ab at samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim at samsung.com>
---
arch/arm/plat-s3c/include/plat/regs-serial.h | 30 +++++
drivers/serial/Kconfig | 9 ++-
drivers/serial/Makefile | 1 +
drivers/serial/s5pv210.c | 154 ++++++++++++++++++++++++++
4 files changed, 193 insertions(+), 1 deletions(-)
create mode 100644 drivers/serial/s5pv210.c
diff --git a/arch/arm/plat-s3c/include/plat/regs-serial.h b/arch/arm/plat-s3c/include/plat/regs-serial.h
index 85d8904..60d6604 100644
--- a/arch/arm/plat-s3c/include/plat/regs-serial.h
+++ b/arch/arm/plat-s3c/include/plat/regs-serial.h
@@ -194,6 +194,36 @@
#define S3C64XX_UINTSP 0x34
#define S3C64XX_UINTM 0x38
+/* Following are specific to S5PV210 and S5P6442 */
+#define S5PV210_UCON_CLKMASK (1<<10)
+#define S5PV210_UCON_PCLK (0<<10)
+#define S5PV210_UCON_UCLK (1<<10)
+
+#define S5PV210_UFCON_TXTRIG0 (0<<8)
+#define S5PV210_UFCON_TXTRIG4 (1<<8)
+#define S5PV210_UFCON_TXTRIG8 (2<<8)
+#define S5PV210_UFCON_TXTRIG16 (3<<8)
+#define S5PV210_UFCON_TXTRIG32 (4<<8)
+#define S5PV210_UFCON_TXTRIG64 (5<<8)
+#define S5PV210_UFCON_TXTRIG128 (6<<8)
+#define S5PV210_UFCON_TXTRIG256 (7<<8)
+
+#define S5PV210_UFCON_RXTRIG1 (0<<4)
+#define S5PV210_UFCON_RXTRIG4 (1<<4)
+#define S5PV210_UFCON_RXTRIG8 (2<<4)
+#define S5PV210_UFCON_RXTRIG16 (3<<4)
+#define S5PV210_UFCON_RXTRIG32 (4<<4)
+#define S5PV210_UFCON_RXTRIG64 (5<<4)
+#define S5PV210_UFCON_RXTRIG128 (6<<4)
+#define S5PV210_UFCON_RXTRIG256 (7<<4)
+
+#define S5PV210_UFSTAT_TXFULL (1<<24)
+#define S5PV210_UFSTAT_RXFULL (1<<8)
+#define S5PV210_UFSTAT_TXMASK (255<<16)
+#define S5PV210_UFSTAT_TXSHIFT (16)
+#define S5PV210_UFSTAT_RXMASK (255<<0)
+#define S5PV210_UFSTAT_RXSHIFT (0)
+
#ifndef __ASSEMBLY__
/* struct s3c24xx_uart_clksrc
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index d7d687f..ebdd2b9 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -459,7 +459,7 @@ config SERIAL_SAMSUNG_UARTS
int
depends on ARM && PLAT_S3C
default 2 if ARCH_S3C2400
- default 4 if ARCH_S5P6440 || ARCH_S5PC1XX || ARCH_S3C64XX || CPU_S3C2443
+ default 4 if ARCH_S5P6440 || ARCH_S5PC1XX || ARCH_S5PV210 || ARCH_S3C64XX || CPU_S3C2443
default 3
help
Select the number of available UART ports for the Samsung S3C
@@ -540,6 +540,13 @@ config SERIAL_S5PC100
help
Serial port support for the Samsung S5PC100 SoCs
+config SERIAL_S5PV210
+ tristate "Samsung S5PV210 Serial port support"
+ depends on SERIAL_SAMSUNG && CPU_S5PV210
+ default y
+ help
+ Serial port support for Samsung's S5P Family of SoC's
+
config SERIAL_MAX3100
tristate "MAX3100 support"
depends on SPI
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 5548fe7..6aa4723 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o
obj-$(CONFIG_SERIAL_S3C24A0) += s3c24a0.o
obj-$(CONFIG_SERIAL_S3C6400) += s3c6400.o
obj-$(CONFIG_SERIAL_S5PC100) += s3c6400.o
+obj-$(CONFIG_SERIAL_S5PV210) += s5pv210.o
obj-$(CONFIG_SERIAL_MAX3100) += max3100.o
obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o
obj-$(CONFIG_SERIAL_MUX) += mux.o
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 at samsung.com>");
--
1.6.2.5
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