This patch includes the serial driver for s5pc1xx
Signed-off-by: Minkyu Kang mk7.kang@samsung.com --- common/serial.c | 18 +++ drivers/serial/Makefile | 1 + drivers/serial/serial_s5pc1xx.c | 308 +++++++++++++++++++++++++++++++++++++++ include/serial.h | 7 + 4 files changed, 334 insertions(+), 0 deletions(-) create mode 100644 drivers/serial/serial_s5pc1xx.c
diff --git a/common/serial.c b/common/serial.c index 41a24c2..e5ce9fd 100644 --- a/common/serial.c +++ b/common/serial.c @@ -69,6 +69,18 @@ struct serial_device *__default_serial_console (void) #else #error "CONFIG_SERIAL? missing." #endif +#elif defined(CONFIG_S5PC1XX) +#if defined(CONFIG_SERIAL0) + return &s5pc1xx_serial0_device; +#elif defined(CONFIG_SERIAL1) + return &s5pc1xx_serial1_device; +#elif defined(CONFIG_SERIAL2) + return &s5pc1xx_serial2_device; +#elif defined(CONFIG_SERIAL3) + return &s5pc1xx_serial3_device; +#else +#error "CONFIG_SERIAL? missing." +#endif #elif defined(CONFIG_OMAP3_ZOOM2) return ZOOM2_DEFAULT_SERIAL_DEVICE; #else @@ -139,6 +151,12 @@ void serial_initialize (void) serial_register(&s3c24xx_serial1_device); serial_register(&s3c24xx_serial2_device); #endif +#if defined(CONFIG_S5PC1XX) + serial_register(&s5pc1xx_serial0_device); + serial_register(&s5pc1xx_serial1_device); + serial_register(&s5pc1xx_serial2_device); + serial_register(&s5pc1xx_serial3_device); +#endif serial_assign (default_serial_console ()->name); }
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 64882a2..3c77a7c 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -33,6 +33,7 @@ COBJS-$(CONFIG_NS9750_UART) += ns9750_serial.o COBJS-$(CONFIG_SYS_NS16550) += ns16550.o COBJS-$(CONFIG_DRIVER_S3C4510_UART) += s3c4510b_uart.o COBJS-$(CONFIG_S3C64XX) += s3c64xx.o +COBJS-$(CONFIG_S5PC1XX) += serial_s5pc1xx.o COBJS-$(CONFIG_SYS_NS16550_SERIAL) += serial.o COBJS-$(CONFIG_CLPS7111_SERIAL) += serial_clps7111.o COBJS-$(CONFIG_IMX_SERIAL) += serial_imx.o diff --git a/drivers/serial/serial_s5pc1xx.c b/drivers/serial/serial_s5pc1xx.c new file mode 100644 index 0000000..f637f3d --- /dev/null +++ b/drivers/serial/serial_s5pc1xx.c @@ -0,0 +1,308 @@ +/* + * (C) Copyright 2009 SAMSUNG Electronics + * Minkyu Kang mk7.kang@samsung.com + * Heungjun Kim riverful.kim@samsung.com + * + * based on drivers/serial/s3c64xx.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/uart.h> +#include <asm/arch/clk.h> + +#if defined(CONFIG_SERIAL_MULTI) +#include <serial.h> + +/* Multi serial device functions */ +#define DECLARE_S5P_SERIAL_FUNCTIONS(port) \ + int s5p_serial##port##_init(void) { \ + return serial_init_dev(port); } \ + void s5p_serial##port##_setbrg(void) { \ + serial_setbrg_dev(port); } \ + int s5p_serial##port##_getc(void) { \ + return serial_getc_dev(port); } \ + int s5p_serial##port##_tstc(void) { \ + return serial_tstc_dev(port); } \ + void s5p_serial##port##_putc(const char c) { \ + serial_putc_dev(port, c); } \ + void s5p_serial##port##_puts(const char *s) { \ + serial_puts_dev(port, s); } + +#define INIT_S5P_SERIAL_STRUCTURE(port, name, bus) { \ + name, \ + bus, \ + s5p_serial##port##_init, \ + s5p_serial##port##_setbrg, \ + s5p_serial##port##_getc, \ + s5p_serial##port##_tstc, \ + s5p_serial##port##_putc, \ + s5p_serial##port##_puts, } +#else + +#ifdef CONFIG_SERIAL0 +#define UART_NR S5PC1XX_UART0 +#elif defined(CONFIG_SERIAL1) +#define UART_NR S5PC1XX_UART1 +#elif defined(CONFIG_SERIAL2) +#define UART_NR S5PC1XX_UART2 +#elif defined(CONFIG_SERIAL3) +#define UART_NR S5PC1XX_UART3 +#else +#error "Bad: you didn't configure serial ..." +#endif + +#endif /* CONFIG_SERIAL_MULTI */ + +static inline struct s5pc1xx_uart *s5pc1xx_get_base_uart(int dev_index) +{ + u32 offset = dev_index * 0x400; + + if (cpu_is_s5pc100()) + return (struct s5pc1xx_uart *)(S5PC100_PA_UART + offset); + else + return (struct s5pc1xx_uart *)(S5PC110_PA_UART + offset); +} + +/* + * The coefficient, used to calculate the baudrate on S5PC1XX UARTs is + * calculated as + * C = UBRDIV * 16 + number_of_set_bits_in_UDIVSLOT + * however, section 31.6.11 of the datasheet doesn't recomment using 1 for 1, + * 3 for 2, ... (2^n - 1) for n, instead, they suggest using these constants: + */ +static const int udivslot[] = { + 0, + 0x0080, + 0x0808, + 0x0888, + 0x2222, + 0x4924, + 0x4a52, + 0x54aa, + 0x5555, + 0xd555, + 0xd5d5, + 0xddd5, + 0xdddd, + 0xdfdd, + 0xdfdf, + 0xffdf, +}; + +void _serial_setbrg(const int dev_index) +{ + DECLARE_GLOBAL_DATA_PTR; + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + u32 pclk = get_pclk(); + u32 baudrate = gd->baudrate; + u32 val; + + val = pclk / baudrate; + + writel(val / 16 - 1, &uart->UBRDIV); + writel(udivslot[val % 16], &uart->UDIVSLOT); +} + +#if defined(CONFIG_SERIAL_MULTI) +static inline void +serial_setbrg_dev(unsigned int dev_index) +{ + _serial_setbrg(dev_index); +} +#else +void serial_setbrg(void) +{ + _serial_setbrg(UART_NR); +} +#endif + +/* + * Initialise the serial port with the given baudrate. The settings + * are always 8 data bits, no parity, 1 stop bit, no start bits. + */ +int serial_init_dev(const int dev_index) +{ + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + + /* reset and enable FIFOs, set triggers to the maximum */ + writel(0, &uart->UFCON); + writel(0, &uart->UMCON); + /* 8N1 */ + writel(0x3, &uart->ULCON); + /* No interrupts, no DMA, pure polling */ + writel(0x245, &uart->UCON); + + _serial_setbrg(dev_index); + + return 0; +} + +#if !defined(CONFIG_SERIAL_MULTI) +int serial_init(void) +{ + return serial_init_dev(UART_NR); +} +#endif + +/* + * Read a single byte from the serial port. Returns 1 on success, 0 + * otherwise. When the function is succesfull, the character read is + * written into its argument c. + */ +int _serial_getc(const int dev_index) +{ + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + + /* wait for character to arrive */ + while (!(readl(&uart->UTRSTAT) & 0x1)) + ; + + return (int)(readl(&uart->URXH) & 0xff); +} + +#if defined(CONFIG_SERIAL_MULTI) +static inline int serial_getc_dev(unsigned int dev_index) +{ + return _serial_getc(dev_index); +} +#else +int serial_getc(void) +{ + return _serial_getc(UART_NR); +} +#endif + +#ifdef CONFIG_MODEM_SUPPORT +static int be_quiet; +void disable_putc(void) +{ + be_quiet = 1; +} + +void enable_putc(void) +{ + be_quiet = 0; +} +#endif + +/* + * Output a single byte to the serial port. + */ +void _serial_putc(const char c, const int dev_index) +{ + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + +#ifdef CONFIG_MODEM_SUPPORT + if (be_quiet) + return; +#endif + + /* wait for room in the tx FIFO */ + while (!(readl(&uart->UTRSTAT) & 0x2)) + ; + + writel(c, &uart->UTXH); + + /* If \n, also do \r */ + if (c == '\n') + serial_putc('\r'); +} + +#if defined(CONFIG_SERIAL_MULTI) +static inline void serial_putc_dev(unsigned int dev_index, const char c) +{ + _serial_putc(c, dev_index); +} +#else +void serial_putc(const char c) +{ + _serial_putc(c, UART_NR); +} +#endif + +/* + * Test whether a character is in the RX buffer + */ +int _serial_tstc(const int dev_index) +{ + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + + return (int)(readl(&uart->UTRSTAT) & 0x1); +} + +#if defined(CONFIG_SERIAL_MULTI) +static inline int serial_tstc_dev(unsigned int dev_index) +{ + return _serial_tstc(dev_index); +} +#else +int serial_tstc(void) +{ + return _serial_tstc(UART_NR); +} +#endif + +void _serial_puts(const char *s, const int dev_index) +{ + while (*s) + _serial_putc(*s++, dev_index); +} + +#if defined(CONFIG_SERIAL_MULTI) +static inline void serial_puts_dev(int dev_index, const char *s) +{ + _serial_puts(s, dev_index); +} +#else +void serial_puts(const char *s) +{ + _serial_puts(s, UART_NR); +} +#endif + +#ifdef CONFIG_HWFLOW +static int hwflow; /* turned off by default */ +int hwflow_onoff(int on) +{ + switch (on) { + case 1: + hwflow = 1; /* turn on */ + break; + case -1: + hwflow = 0; /* turn off */ + break; + } + return hwflow; +} +#endif + +#if defined(CONFIG_SERIAL_MULTI) +DECLARE_S5P_SERIAL_FUNCTIONS(0); +struct serial_device s5pc1xx_serial0_device = + INIT_S5P_SERIAL_STRUCTURE(0, "s5pser0", "S5PUART0"); +DECLARE_S5P_SERIAL_FUNCTIONS(1); +struct serial_device s5pc1xx_serial1_device = + INIT_S5P_SERIAL_STRUCTURE(1, "s5pser1", "S5PUART1"); +DECLARE_S5P_SERIAL_FUNCTIONS(2); +struct serial_device s5pc1xx_serial2_device = + INIT_S5P_SERIAL_STRUCTURE(2, "s5pser2", "S5PUART2"); +DECLARE_S5P_SERIAL_FUNCTIONS(3); +struct serial_device s5pc1xx_serial3_device = + INIT_S5P_SERIAL_STRUCTURE(3, "s5pser3", "S5PUART3"); +#endif /* CONFIG_SERIAL_MULTI */ diff --git a/include/serial.h b/include/serial.h index 821b583..bbda3f0 100644 --- a/include/serial.h +++ b/include/serial.h @@ -43,6 +43,13 @@ extern struct serial_device s3c24xx_serial1_device; extern struct serial_device s3c24xx_serial2_device; #endif
+#if defined(CONFIG_S5PC1XX) +extern struct serial_device s5pc1xx_serial0_device; +extern struct serial_device s5pc1xx_serial1_device; +extern struct serial_device s5pc1xx_serial2_device; +extern struct serial_device s5pc1xx_serial3_device; +#endif + #if defined(CONFIG_OMAP3_ZOOM2) extern struct serial_device zoom2_serial_device0; extern struct serial_device zoom2_serial_device1;