diff options
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Makefile | 1 | ||||
| -rw-r--r-- | drivers/serial/serial_s3c24x0.c | 160 | ||||
| -rw-r--r-- | drivers/serial/serial_s5pc1xx.c | 195 |
3 files changed, 287 insertions, 69 deletions
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_s3c24x0.c b/drivers/serial/serial_s3c24x0.c index 6d69c43..c2c72e4 100644 --- a/drivers/serial/serial_s3c24x0.c +++ b/drivers/serial/serial_s3c24x0.c @@ -38,7 +38,7 @@ DECLARE_GLOBAL_DATA_PTR; #elif defined(CONFIG_SERIAL3) # if defined(CONFIG_TRAB) -# #error "TRAB supports only CONFIG_SERIAL1" +# error "TRAB supports only CONFIG_SERIAL1" # endif #define UART_NR S3C24X0_UART2 @@ -46,51 +46,71 @@ DECLARE_GLOBAL_DATA_PTR; #error "Bad: you didn't configure serial ..." #endif +#include <asm/io.h> + #if defined(CONFIG_SERIAL_MULTI) #include <serial.h> /* Multi serial device functions */ #define DECLARE_S3C_SERIAL_FUNCTIONS(port) \ - int s3serial##port##_init (void) {\ - return serial_init_dev(port);}\ - void s3serial##port##_setbrg (void) {\ - serial_setbrg_dev(port);}\ - int s3serial##port##_getc (void) {\ - return serial_getc_dev(port);}\ - int s3serial##port##_tstc (void) {\ - return serial_tstc_dev(port);}\ - void s3serial##port##_putc (const char c) {\ - serial_putc_dev(port, c);}\ - void s3serial##port##_puts (const char *s) {\ - serial_puts_dev(port, s);} - -#define INIT_S3C_SERIAL_STRUCTURE(port,name,bus) {\ - name,\ - bus,\ - s3serial##port##_init,\ - s3serial##port##_setbrg,\ - s3serial##port##_getc,\ - s3serial##port##_tstc,\ - s3serial##port##_putc,\ - s3serial##port##_puts, } + int s3serial##port##_init(void) \ + { \ + return serial_init_dev(port); \ + } \ + void s3serial##port##_setbrg(void) \ + { \ + serial_setbrg_dev(port); \ + } \ + int s3serial##port##_getc(void) \ + { \ + return serial_getc_dev(port); \ + } \ + int s3serial##port##_tstc(void) \ + { \ + return serial_tstc_dev(port); \ + } \ + void s3serial##port##_putc(const char c) \ + { \ + serial_putc_dev(port, c); \ + } \ + void s3serial##port##_puts(const char *s) \ + { \ + serial_puts_dev(port, s); \ + } + +#define INIT_S3C_SERIAL_STRUCTURE(port, name, bus) { \ + name, \ + bus, \ + s3serial##port##_init, \ + s3serial##port##_setbrg, \ + s3serial##port##_getc, \ + s3serial##port##_tstc, \ + s3serial##port##_putc, \ + s3serial##port##_puts, \ +} #endif /* CONFIG_SERIAL_MULTI */ +#ifdef CONFIG_HWFLOW +static int hwflow; +#endif + void _serial_setbrg(const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); + struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index); unsigned int reg = 0; int i; /* value is calculated so : (int)(PCLK/16./baudrate) -1 */ reg = get_PCLK() / (16 * gd->baudrate) - 1; - uart->UBRDIV = reg; - for (i = 0; i < 100; i++); + writel(reg, &uart->UBRDIV); + for (i = 0; i < 100; i++) + /* Delay */ ; } + #if defined(CONFIG_SERIAL_MULTI) -static inline void -serial_setbrg_dev(unsigned int dev_index) +static inline void serial_setbrg_dev(unsigned int dev_index) { _serial_setbrg(dev_index); } @@ -107,29 +127,33 @@ void serial_setbrg(void) */ static int serial_init_dev(const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); + struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index); + +#ifdef CONFIG_HWFLOW + hwflow = 0; /* turned off by default */ +#endif /* FIFO enable, Tx/Rx FIFO clear */ - uart->UFCON = 0x07; - uart->UMCON = 0x0; + writel(0x07, &uart->UFCON); + writel(0x0, &uart->UMCON); /* Normal,No parity,1 stop,8 bit */ - uart->ULCON = 0x3; + writel(0x3, &uart->ULCON); /* * tx=level,rx=edge,disable timeout int.,enable rx error int., * normal,interrupt or polling */ - uart->UCON = 0x245; + writel(0x245, &uart->UCON); #ifdef CONFIG_HWFLOW - uart->UMCON = 0x1; /* RTS up */ + writel(0x1, &uart->UMCON); /* RTS up */ #endif /* FIXME: This is sooooooooooooooooooo ugly */ #if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2) /* we need auto hw flow control on the gsm and gps port */ if (dev_index == 0 || dev_index == 1) - uart->UMCON = 0x10; + writel(0x10, &uart->UMCON); #endif _serial_setbrg(dev_index); @@ -140,7 +164,7 @@ static int serial_init_dev(const int dev_index) /* Initialise the serial port. The settings are always 8 data bits, no parity, * 1 stop bit, no start bits. */ -int serial_init (void) +int serial_init(void) { return serial_init_dev(UART_NR); } @@ -151,40 +175,40 @@ int serial_init (void) * otherwise. When the function is succesfull, the character read is * written into its argument c. */ -int _serial_getc (const int dev_index) +int _serial_getc(const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); + struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index); - /* wait for character to arrive */ - while (!(uart->UTRSTAT & 0x1)); + while (!(readl(&uart->UTRSTAT) & 0x1)) + /* wait for character to arrive */ ; - return uart->URXH & 0xff; + return readb(&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) +int serial_getc(void) { return _serial_getc(UART_NR); } #endif #ifdef CONFIG_HWFLOW -static int hwflow = 0; /* turned off by default */ int hwflow_onoff(int on) { - switch(on) { + switch (on) { case 0: default: - break; /* return current */ + break; /* return current */ case 1: - hwflow = 1; /* turn on */ + hwflow = 1; /* turn on */ break; case -1: - hwflow = 0; /* turn off */ + hwflow = 0; /* turn off */ break; } return hwflow; @@ -208,29 +232,29 @@ void enable_putc(void) /* * Output a single byte to the serial port. */ -void _serial_putc (const char c, const int dev_index) +void _serial_putc(const char c, const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); + struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index); #ifdef CONFIG_MODEM_SUPPORT if (be_quiet) return; #endif - /* wait for room in the tx FIFO */ - while (!(uart->UTRSTAT & 0x2)); + while (!(readl(&uart->UTRSTAT) & 0x2)) + /* wait for room in the tx FIFO */ ; #ifdef CONFIG_HWFLOW - /* Wait for CTS up */ - while(hwflow && !(uart->UMSTAT & 0x1)) - ; + while (hwflow && !(readl(&uart->UMSTAT) & 0x1)) + /* Wait for CTS up */ ; #endif - uart->UTXH = c; + writeb(c, &uart->UTXH); /* If \n, also do \r */ if (c == '\n') - serial_putc ('\r'); + serial_putc('\r'); } + #if defined(CONFIG_SERIAL_MULTI) static inline void serial_putc_dev(unsigned int dev_index, const char c) { @@ -249,13 +273,13 @@ void serial_putc(const char c) */ int _serial_tstc(const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); + struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index); - return uart->UTRSTAT & 0x1; + return readl(&uart->UTRSTAT) & 0x1; } + #if defined(CONFIG_SERIAL_MULTI) -static inline int -serial_tstc_dev(unsigned int dev_index) +static inline int serial_tstc_dev(unsigned int dev_index) { return _serial_tstc(dev_index); } @@ -269,18 +293,17 @@ int serial_tstc(void) void _serial_puts(const char *s, const int dev_index) { while (*s) { - _serial_putc (*s++, dev_index); + _serial_putc(*s++, dev_index); } } + #if defined(CONFIG_SERIAL_MULTI) -static inline void -serial_puts_dev(int dev_index, const char *s) +static inline void serial_puts_dev(int dev_index, const char *s) { _serial_puts(s, dev_index); } #else -void -serial_puts (const char *s) +void serial_puts(const char *s) { _serial_puts(s, UART_NR); } @@ -289,12 +312,11 @@ serial_puts (const char *s) #if defined(CONFIG_SERIAL_MULTI) DECLARE_S3C_SERIAL_FUNCTIONS(0); struct serial_device s3c24xx_serial0_device = - INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0", "S3UART1"); +INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0", "S3UART1"); DECLARE_S3C_SERIAL_FUNCTIONS(1); struct serial_device s3c24xx_serial1_device = - INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1", "S3UART2"); +INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1", "S3UART2"); DECLARE_S3C_SERIAL_FUNCTIONS(2); struct serial_device s3c24xx_serial2_device = - INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3"); - +INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3"); #endif /* CONFIG_SERIAL_MULTI */ diff --git a/drivers/serial/serial_s5pc1xx.c b/drivers/serial/serial_s5pc1xx.c new file mode 100644 index 0000000..68c06a9 --- /dev/null +++ b/drivers/serial/serial_s5pc1xx.c @@ -0,0 +1,195 @@ +/* + * (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> +#include <serial.h> + +static inline struct s5pc1xx_uart *s5pc1xx_get_base_uart(int dev_index) +{ + u32 offset = dev_index * sizeof(struct s5pc1xx_uart); + + if (cpu_is_s5pc100()) + return (struct s5pc1xx_uart *)(S5PC100_UART_BASE + offset); + else + return (struct s5pc1xx_uart *)(S5PC110_UART_BASE + 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_dev(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); + writew(udivslot[val % 16], &uart->udivslot); +} + +/* + * 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(dev_index); + + return 0; +} + +static int serial_err_check(const int dev_index) +{ + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + + if (readl(&uart->uerstat) & 0xf) + return 1; + + return 0; +} + +/* + * 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_dev(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)) { + if (serial_err_check(dev_index)) + return 0; + } + + return (int)(readl(&uart->urxh) & 0xff); +} + +/* + * Output a single byte to the serial port. + */ +void serial_putc_dev(const char c, const int dev_index) +{ + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + + /* wait for room in the tx FIFO */ + while (!(readl(&uart->utrstat) & 0x2)) { + if (serial_err_check(dev_index)) + return; + } + + writel(c, &uart->utxh); + + /* If \n, also do \r */ + if (c == '\n') + serial_putc('\r'); +} + +/* + * Test whether a character is in the RX buffer + */ +int serial_tstc_dev(const int dev_index) +{ + struct s5pc1xx_uart *const uart = s5pc1xx_get_base_uart(dev_index); + + return (int)(readl(&uart->utrstat) & 0x1); +} + +void serial_puts_dev(const char *s, const int dev_index) +{ + while (*s) + serial_putc_dev(*s++, dev_index); +} + +/* 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(c, port); } \ +void s5p_serial##port##_puts(const char *s) { serial_puts_dev(s, port); } + +#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, } + +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"); |