diff options
Diffstat (limited to 'cpu/arm920t/s3c24x0/serial.c')
| -rw-r--r-- | cpu/arm920t/s3c24x0/serial.c | 164 |
1 files changed, 143 insertions, 21 deletions
diff --git a/cpu/arm920t/s3c24x0/serial.c b/cpu/arm920t/s3c24x0/serial.c index 36851ad5c..6e853b87a 100644 --- a/cpu/arm920t/s3c24x0/serial.c +++ b/cpu/arm920t/s3c24x0/serial.c @@ -48,18 +48,74 @@ DECLARE_GLOBAL_DATA_PTR; #error "Bad: you didn't configure serial ..." #endif -void serial_setbrg (void) +#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, } + +#endif /* CONFIG_SERIAL_MULTI */ + +void _serial_setbrg(const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR); - int i; + S3C24X0_UART * const uart = S3C24X0_GetBase_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++); +} +#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. The settings are always 8 data bits, no parity, + * 1 stop bit, no start bits. + */ +static int serial_init_dev(const int dev_index) +{ + S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); + int i; + /* FIFO enable, Tx/Rx FIFO clear */ uart->UFCON = 0x07; uart->UMCON = 0x0; + /* Normal,No parity,1 stop,8 bit */ uart->ULCON = 0x3; /* @@ -67,40 +123,57 @@ void serial_setbrg (void) * normal,interrupt or polling */ uart->UCON = 0x245; - uart->UBRDIV = reg; #ifdef CONFIG_HWFLOW uart->UMCON = 0x1; /* RTS up */ #endif - for (i = 0; i < 100; i++); + + /* 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; +#endif + _serial_setbrg(dev_index); + + return (0); } -/* - * Initialise the serial port with the given baudrate. The settings - * are always 8 data bits, no parity, 1 stop bit, no start bits. - * +#if !defined(CONFIG_SERIAL_MULTI) +/* Initialise the serial port. The settings are always 8 data bits, no parity, + * 1 stop bit, no start bits. */ int serial_init (void) { - serial_setbrg (); - - return (0); + 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 (void) +int _serial_getc (const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR); + S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); /* wait for character to arrive */ while (!(uart->UTRSTAT & 0x1)); return 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_HWFLOW static int hwflow = 0; /* turned off by default */ @@ -138,9 +211,9 @@ void enable_putc(void) /* * Output a single byte to the serial port. */ -void serial_putc (const char c) +void _serial_putc (const char c, const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR); + S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); #ifdef CONFIG_MODEM_SUPPORT if (be_quiet) return; @@ -161,23 +234,72 @@ void serial_putc (const char c) 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 (void) +int _serial_tstc(const int dev_index) { - S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR); + S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); return 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) +void _serial_puts(const char *s, const int dev_index) { while (*s) { - serial_putc (*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 + +#if defined(CONFIG_SERIAL_MULTI) +DECLARE_S3C_SERIAL_FUNCTIONS(0); +struct serial_device s3c24xx_serial0_device = + 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"); +DECLARE_S3C_SERIAL_FUNCTIONS(2); +struct serial_device s3c24xx_serial2_device = + INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3"); + +#endif /* CONFIG_SERIAL_MULTI */ #endif /* defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) */ |