/* * Simple serial driver for Cogent motherboard serial ports * for use during boot */ #include <common.h> #include <board/cogent/serial.h> DECLARE_GLOBAL_DATA_PTR; #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) { 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) { 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 defined(CONFIG_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 */