From: Changhwan Youn <chaos.youn@xxxxxxxxxxx> This patch adds UART serial port support for S5PV310 CPU. Signed-off-by: Changhwan Youn <chaos.youn@xxxxxxxxxxx> Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx> --- drivers/serial/Kconfig | 8 +++ drivers/serial/Makefile | 1 + drivers/serial/s5pv310.c | 124 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 133 insertions(+), 0 deletions(-) create mode 100644 drivers/serial/s5pv310.c diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 8b23165..b5ff41f 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -550,6 +550,14 @@ config SERIAL_S5PV210 help Serial port support for Samsung's S5P Family of SoC's +config SERIAL_S5PV310 + tristate "Samsung S5PV310 Serial port support" + depends on SERIAL_SAMSUNG && CPU_S5PV310 + select SERIAL_SAMSUNG_UARTS_4 + 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 208a855..bd32d3f 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_S5PV210) += s5pv210.o +obj-$(CONFIG_SERIAL_S5PV310) += s5pv310.o obj-$(CONFIG_SERIAL_MAX3100) += max3100.o obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o obj-$(CONFIG_SERIAL_MUX) += mux.o diff --git a/drivers/serial/s5pv310.c b/drivers/serial/s5pv310.c new file mode 100644 index 0000000..1d466cf --- /dev/null +++ b/drivers/serial/s5pv310.c @@ -0,0 +1,124 @@ +/* linux/drivers/serial/s5pv310.c + * + * Copyright (c) 2010 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * Based on drivers/serial/s5pv210.c + * + * Driver for Samsung S5PV310 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/io.h> +#include <linux/platform_device.h> +#include <linux/serial_core.h> + +#include <plat/regs-serial.h> +#include "samsung.h" + +static int s5pv310_serial_setsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + /* for s5pv310, serial clock source is only uclk1 */ + return 0; +}; + +static int s5pv310_serial_getsource(struct uart_port *port, + struct s3c24xx_uart_clksrc *clk) +{ + /* for s5pv310, serial clock source is only uclk1 */ + clk->divisor = 1; + clk->name = "uclk1"; + return 0; +}; + +static int s5pv310_serial_resetport(struct uart_port *port, + struct s3c2410_uartcfg *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; +} + +#define S5PV310_UART_DEFAULT_INFO(fifo_size) \ + .name = "Samsung S5PV310 UART", \ + .type = PORT_S3C6400, \ + .fifosize = fifo_size, \ + .has_fracval = 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 = s5pv310_serial_getsource, \ + .set_clksrc = s5pv310_serial_setsource, \ + .reset_port = s5pv310_serial_resetport + +static struct s3c24xx_uart_info s5p_port_fifo256 = { + S5PV310_UART_DEFAULT_INFO(256), +}; + +static struct s3c24xx_uart_info s5p_port_fifo64 = { + S5PV310_UART_DEFAULT_INFO(64), +}; + +static struct s3c24xx_uart_info s5p_port_fifo16 = { + S5PV310_UART_DEFAULT_INFO(16), +}; + +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_driver = { + .probe = s5p_serial_probe, + .remove = __devexit_p(s3c24xx_serial_remove), + .driver = { + .name = "s5pv310-uart", + .owner = THIS_MODULE, + }, +}; + +static int __init s5pv310_serial_console_init(void) +{ + return s3c24xx_serial_initconsole(&s5p_serial_driver, s5p_uart_inf); +} + +console_initcall(s5pv310_serial_console_init); + +static int __init s5p_serial_init(void) +{ + return s3c24xx_serial_init(&s5p_serial_driver, *s5p_uart_inf); +} + +static void __exit s5p_serial_exit(void) +{ + platform_driver_unregister(&s5p_serial_driver); +} + +module_init(s5p_serial_init); +module_exit(s5p_serial_exit); + +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:s5pv310-uart"); +MODULE_DESCRIPTION("Samsung S5PV310 UART Driver support"); +MODULE_AUTHOR("Changhwan Youn <chaos.youn@xxxxxxxxxxx>"); 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