diff options
Diffstat (limited to 'board/cogent/serial.c')
| -rw-r--r-- | board/cogent/serial.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/board/cogent/serial.c b/board/cogent/serial.c new file mode 100644 index 0000000..4c20017 --- /dev/null +++ b/board/cogent/serial.c @@ -0,0 +1,190 @@ +/* + * Simple serial driver for Cogent motherboard serial ports + * for use during boot + */ + +#include <common.h> +#include <board/cogent/serial.h> + +#if (CMA_MB_CAPS & CMA_MB_CAP_SERPAR) + +#if (defined(CONFIG_8xx) && defined(CONFIG_8xx_CONS_NONE)) || \ + (defined(CONFIG_8260) && defined(CONFIG_CONS_NONE)) + +#if CONFIG_CONS_INDEX == 1 +#define CMA_MB_SERIAL_BASE CMA_MB_SERIALA_BASE +#elif CONFIG_CONS_INDEX == 2 +#define CMA_MB_SERIAL_BASE CMA_MB_SERIALB_BASE +#elif CONFIG_CONS_INDEX == 3 && (CMA_MB_CAPS & CMA_MB_CAP_SER2) +#define CMA_MB_SERIAL_BASE CMA_MB_SER2A_BASE +#elif CONFIG_CONS_INDEX == 4 && (CMA_MB_CAPS & CMA_MB_CAP_SER2) +#define CMA_MB_SERIAL_BASE CMA_MB_SER2B_BASE +#else +#error CONFIG_CONS_INDEX must be configured for Cogent motherboard serial +#endif + +int serial_init (void) +{ +/* DECLARE_GLOBAL_DATA_PTR; */ + + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_SERIAL_BASE; + + cma_mb_reg_write(&mbsp->ser_ier, 0x00); /* turn off interrupts */ + serial_setbrg (); + cma_mb_reg_write(&mbsp->ser_lcr, 0x03); /* 8 data, 1 stop, no parity */ + cma_mb_reg_write(&mbsp->ser_mcr, 0x03); /* RTS/DTR */ + cma_mb_reg_write(&mbsp->ser_fcr, 0x07); /* Clear & enable FIFOs */ + + return (0); +} + +void +serial_setbrg (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_SERIAL_BASE; + unsigned int divisor; + unsigned char lcr; + + if ((divisor = br_to_div(gd->baudrate)) == 0) + divisor = DEFDIV; + + lcr = cma_mb_reg_read(&mbsp->ser_lcr); + cma_mb_reg_write(&mbsp->ser_lcr, lcr|0x80);/* Access baud rate(set DLAB)*/ + cma_mb_reg_write(&mbsp->ser_brl, divisor & 0xff); + cma_mb_reg_write(&mbsp->ser_brh, (divisor >> 8) & 0xff); + cma_mb_reg_write(&mbsp->ser_lcr, lcr); /* unset DLAB */ +} + +void +serial_putc(const char c) +{ + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_SERIAL_BASE; + + if (c == '\n') + serial_putc('\r'); + + while ((cma_mb_reg_read(&mbsp->ser_lsr) & LSR_THRE) == 0) + ; + + cma_mb_reg_write(&mbsp->ser_thr, c); +} + +void +serial_puts(const char *s) +{ + while (*s != '\0') + serial_putc(*s++); +} + +int +serial_getc(void) +{ + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_SERIAL_BASE; + + while ((cma_mb_reg_read(&mbsp->ser_lsr) & LSR_DR) == 0) + ; + + return ((int)cma_mb_reg_read(&mbsp->ser_rhr) & 0x7f); +} + +int +serial_tstc(void) +{ + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_SERIAL_BASE; + + return ((cma_mb_reg_read(&mbsp->ser_lsr) & LSR_DR) != 0); +} + +#endif /* CONS_NONE */ + +#if (CONFIG_COMMANDS & CFG_CMD_KGDB) && \ + defined(CONFIG_KGDB_NONE) + +#if CONFIG_KGDB_INDEX == CONFIG_CONS_INDEX +#error Console and kgdb are on the same serial port - this is not supported +#endif + +#if CONFIG_KGDB_INDEX == 1 +#define CMA_MB_KGDB_SER_BASE CMA_MB_SERIALA_BASE +#elif CONFIG_KGDB_INDEX == 2 +#define CMA_MB_KGDB_SER_BASE CMA_MB_SERIALB_BASE +#elif CONFIG_KGDB_INDEX == 3 && (CMA_MB_CAPS & CMA_MB_CAP_SER2) +#define CMA_MB_KGDB_SER_BASE CMA_MB_SER2A_BASE +#elif CONFIG_KGDB_INDEX == 4 && (CMA_MB_CAPS & CMA_MB_CAP_SER2) +#define CMA_MB_KGDB_SER_BASE CMA_MB_SER2B_BASE +#else +#error CONFIG_KGDB_INDEX must be configured for Cogent motherboard serial +#endif + +void +kgdb_serial_init(void) +{ + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_KGDB_SER_BASE; + unsigned int divisor; + + if ((divisor = br_to_div(CONFIG_KGDB_BAUDRATE)) == 0) + divisor = DEFDIV; + + cma_mb_reg_write(&mbsp->ser_ier, 0x00); /* turn off interrupts */ + cma_mb_reg_write(&mbsp->ser_lcr, 0x80); /* Access baud rate(set DLAB)*/ + cma_mb_reg_write(&mbsp->ser_brl, divisor & 0xff); + cma_mb_reg_write(&mbsp->ser_brh, (divisor >> 8) & 0xff); + cma_mb_reg_write(&mbsp->ser_lcr, 0x03); /* 8 data, 1 stop, no parity */ + cma_mb_reg_write(&mbsp->ser_mcr, 0x03); /* RTS/DTR */ + cma_mb_reg_write(&mbsp->ser_fcr, 0x07); /* Clear & enable FIFOs */ + + printf("[on cma10x serial port B] "); +} + +void +putDebugChar(int c) +{ + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_KGDB_SER_BASE; + + while ((cma_mb_reg_read(&mbsp->ser_lsr) & LSR_THRE) == 0) + ; + + cma_mb_reg_write(&mbsp->ser_thr, c & 0xff); +} + +void +putDebugStr(const char *str) +{ + while (*str != '\0') { + if (*str == '\n') + putDebugChar('\r'); + putDebugChar(*str++); + } +} + +int +getDebugChar(void) +{ + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_KGDB_SER_BASE; + + while ((cma_mb_reg_read(&mbsp->ser_lsr) & LSR_DR) == 0) + ; + + return ((int)cma_mb_reg_read(&mbsp->ser_rhr) & 0x7f); +} + +void +kgdb_interruptible(int yes) +{ + cma_mb_serial *mbsp = (cma_mb_serial *)CMA_MB_KGDB_SER_BASE; + + if (yes == 1) { + printf("kgdb: turning serial ints on\n"); + cma_mb_reg_write(&mbsp->ser_ier, 0xf); + } + else { + printf("kgdb: turning serial ints off\n"); + cma_mb_reg_write(&mbsp->ser_ier, 0x0); + } +} + +#endif /* KGDB && KGDB_NONE */ + +#endif /* CAPS & SERPAR */ |