diff options
Diffstat (limited to 'cpu/mcf52x2/serial.c')
| -rw-r--r-- | cpu/mcf52x2/serial.c | 109 |
1 files changed, 63 insertions, 46 deletions
diff --git a/cpu/mcf52x2/serial.c b/cpu/mcf52x2/serial.c index fe412a0..8be09e3 100644 --- a/cpu/mcf52x2/serial.c +++ b/cpu/mcf52x2/serial.c @@ -23,9 +23,14 @@ #include <common.h> #include <command.h> +#include <watchdog.h> #include <asm/mcfuart.h> +#ifdef CONFIG_M5271 +#include <asm/m5271.h> +#endif + #ifdef CONFIG_M5272 #include <asm/m5272.h> #endif @@ -40,7 +45,7 @@ DECLARE_GLOBAL_DATA_PTR; -#ifdef CONFIG_M5249 +#if defined(CONFIG_M5249) || defined(CONFIG_M5271) #define DoubleClock(a) ((double)(CFG_CLK/2) / 32.0 / (double)(a)) #else #define DoubleClock(a) ((double)(CFG_CLK) / 32.0 / (double)(a)) @@ -48,72 +53,77 @@ DECLARE_GLOBAL_DATA_PTR; void rs_serial_setbaudrate(int port,int baudrate) { -#if defined(CONFIG_M5272) || defined(CONFIG_M5249) +#if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5271) volatile unsigned char *uartp; - double clock, fraction; +# ifndef CONFIG_M5271 + double fraction; +# endif + double clock; if (port == 0) - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1); + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1); else - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2); + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2); - clock = DoubleClock(baudrate); /* Set baud above */ + clock = DoubleClock(baudrate); /* Set baud above */ - fraction = ((clock - (int)clock) * 16.0) + 0.5; + uartp[MCFUART_UBG1] = (((int)clock >> 8) & 0xff); /* set msb baud */ + uartp[MCFUART_UBG2] = ((int)clock & 0xff); /* set lsb baud */ - uartp[MCFUART_UBG1] = (((int)clock >> 8) & 0xff); /* set msb baud */ - uartp[MCFUART_UBG2] = ((int)clock & 0xff); /* set lsb baud */ - uartp[MCFUART_UFPD] = ((int)fraction & 0xf); /* set baud fraction adjust */ +# ifndef CONFIG_M5271 + fraction = ((clock - (int)clock) * 16.0) + 0.5; + uartp[MCFUART_UFPD] = ((int)fraction & 0xf); /* set baud fraction adjust */ +# endif #endif + #if defined(CONFIG_M5282) volatile unsigned char *uartp; long clock; - switch (port) - { - case 1: - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2); - break; - case 2: - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE3); - break; - default: - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1); + switch (port) { + case 1: + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2); + break; + case 2: + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE3); + break; + default: + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1); } - clock = (long) CFG_CLK / ((long) 32 * baudrate); /* Set baud above */ + clock = (long) CFG_CLK / ((long) 32 * baudrate); /* Set baud above */ - uartp[MCFUART_UBG1] = (((int)clock >> 8) & 0xff); /* set msb baud */ - uartp[MCFUART_UBG2] = ((int) clock & 0xff); /* set lsb baud */ + uartp[MCFUART_UBG1] = (((int)clock >> 8) & 0xff); /* set msb baud */ + uartp[MCFUART_UBG2] = ((int) clock & 0xff); /* set lsb baud */ #endif }; -void rs_serial_init(int port,int baudrate) +void rs_serial_init (int port, int baudrate) { - volatile unsigned char *uartp; + volatile unsigned char *uartp; /* - * Reset UART, get it into known state... + * Reset UART, get it into known state... */ - switch (port) - { - case 1: - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2); - break; - #if defined(CONFIG_M5282) - case 2: - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE3); - break; - #endif - default: - uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1); + switch (port) { + case 1: + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2); + break; +#if defined(CONFIG_M5282) + case 2: + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE3); + break; +#endif + default: + uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1); } - uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ - uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ - uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */ - uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; /* reset Error pointer */ + uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */ + uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */ + + uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */ + uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; /* reset Error pointer */ /* * Set port for CONSOLE_BAUD_RATE, 8 data bits, 1 stop bit, no parity. @@ -121,9 +131,15 @@ void rs_serial_init(int port,int baudrate) uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8; uartp[MCFUART_UMR] = MCFUART_MR2_STOP1; - rs_serial_setbaudrate(port,baudrate); + /* Mask UART interrupts */ + uartp[MCFUART_UIMR] = 0; + /* Set clock Select Register: Tx/Rx clock is timer */ uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER; + + rs_serial_setbaudrate (port, baudrate); + + /* Enable Tx/Rx */ uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE; return; @@ -183,13 +199,14 @@ void serial_putc(const char c) { } void serial_puts (const char *s) { - while (*s) { + while (*s) serial_putc(*s++); - } } int serial_getc(void) { - while(!rs_is_char()); + while(!rs_is_char()) + WATCHDOG_RESET(); + return rs_get_char(); } |