diff options
Diffstat (limited to 'cpu/mips/serial.c')
| -rw-r--r-- | cpu/mips/serial.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/cpu/mips/serial.c b/cpu/mips/serial.c index ebda509..b26f41d 100644 --- a/cpu/mips/serial.c +++ b/cpu/mips/serial.c @@ -2,10 +2,49 @@ * (INCA) ASC UART support */ +#include <config.h> + +#ifdef CONFIG_PURPLE +#define serial_init asc_serial_init +#define serial_putc asc_serial_putc +#define serial_puts asc_serial_puts +#define serial_getc asc_serial_getc +#define serial_tstc asc_serial_tstc +#define serial_setbrg asc_serial_setbrg +#endif + #include <common.h> #include <asm/inca-ip.h> #include "serial.h" +#ifdef CONFIG_PURPLE + +#undef ASC_FIFO_PRESENT +#define TOUT_LOOP 100000 + +/* Set base address for second FPI interrupt control register bank */ +#define SFPI_INTCON_BASEADDR 0xBF0F0000 + +/* Register offset from base address */ +#define FBS_ISR 0x00000000 /* Interrupt status register */ +#define FBS_IMR 0x00000008 /* Interrupt mask register */ +#define FBS_IDIS 0x00000010 /* Interrupt disable register */ + +/* Interrupt status register bits */ +#define FBS_ISR_AT 0x00000040 /* ASC transmit interrupt */ +#define FBS_ISR_AR 0x00000020 /* ASC receive interrupt */ +#define FBS_ISR_AE 0x00000010 /* ASC error interrupt */ +#define FBS_ISR_AB 0x00000008 /* ASC transmit buffer interrupt */ +#define FBS_ISR_AS 0x00000004 /* ASC start of autobaud detection interrupt */ +#define FBS_ISR_AF 0x00000002 /* ASC end of autobaud detection interrupt */ + +#else + +#define ASC_FIFO_PRESENT + +#endif + + #define SET_BIT(reg, mask) reg |= (mask) #define CLEAR_BIT(reg, mask) reg &= (~mask) #define CLEAR_BITS(reg, mask) CLEAR_BIT(reg, mask) @@ -32,8 +71,10 @@ static volatile incaAsc_t *pAsc = (incaAsc_t *)INCA_IP_ASC; int serial_init (void) { +#ifdef CONFIG_INCA_IP /* we have to set PMU.EN13 bit to enable an ASC device*/ INCAASC_PMU_ENABLE(13); +#endif /* and we have to set CLC register*/ CLEAR_BIT(pAsc->asc_clc, ASCCLC_DISS); @@ -45,6 +86,7 @@ int serial_init (void) /* select input port */ pAsc->asc_pisel = (CONSOLE_TTY & 0x1); +#ifdef ASC_FIFO_PRESENT /* TXFIFO's filling level */ SET_BITFIELD(pAsc->asc_txfcon, ASCTXFCON_TXFITLMASK, ASCTXFCON_TXFITLOFF, INCAASC_TXFIFO_FL); @@ -56,20 +98,25 @@ int serial_init (void) ASCRXFCON_RXFITLOFF, INCAASC_RXFIFO_FL); /* enable RXFIFO */ SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXFEN); +#endif /* enable error signals */ SET_BIT(pAsc->asc_con, ASCCON_FEN); SET_BIT(pAsc->asc_con, ASCCON_OEN); +#ifdef CONFIG_INCA_IP /* acknowledge ASC interrupts */ ASC_INTERRUPTS_CLEAR(INCAASC_IRQ_LINE_ALL); /* disable ASC interrupts */ ASC_INTERRUPTS_DISABLE(INCAASC_IRQ_LINE_ALL); +#endif +#ifdef ASC_FIFO_PRESENT /* set FIFOs into the transparent mode */ SET_BIT(pAsc->asc_txfcon, ASCTXFCON_TXTMEN); SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXTMEN); +#endif /* set baud rate */ serial_setbrg(); @@ -85,7 +132,11 @@ void serial_setbrg (void) ulong uiReloadValue, fdv; ulong f_ASC; +#ifdef CONFIG_INCA_IP f_ASC = incaip_get_fpiclk(); +#else + f_ASC = ASC_CLOCK_RATE; +#endif #ifndef INCAASC_USE_FDV fdv = 2; @@ -210,10 +261,15 @@ static int serial_setopt (void) void serial_putc (const char c) { +#ifdef ASC_FIFO_PRESENT uint txFl = 0; +#else + uint timeout = 0; +#endif if (c == '\n') serial_putc ('\r'); +#ifdef ASC_FIFO_PRESENT /* check do we have a free space in the TX FIFO */ /* get current filling level */ do @@ -221,8 +277,25 @@ void serial_putc (const char c) txFl = ( pAsc->asc_fstat & ASCFSTAT_TXFFLMASK ) >> ASCFSTAT_TXFFLOFF; } while ( txFl == INCAASC_TXFIFO_FULL ); +#else + + while(!(*(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) & + FBS_ISR_AB)) + { + if (timeout++ > TOUT_LOOP) + { + break; + } + } +#endif pAsc->asc_tbuf = c; /* write char to Transmit Buffer Register */ + +#ifndef ASC_FIFO_PRESENT + *(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) = FBS_ISR_AB | + FBS_ISR_AT; +#endif + /* check for errors */ if ( pAsc->asc_con & ASCCON_OE ) { @@ -251,6 +324,10 @@ int serial_getc (void) c = (char)(pAsc->asc_rbuf & symbol_mask); +#ifndef ASC_FIFO_PRESENT + *(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) = FBS_ISR_AR; +#endif + return c; } @@ -258,10 +335,19 @@ int serial_tstc (void) { int res = 1; +#ifdef ASC_FIFO_PRESENT if ( (pAsc->asc_fstat & ASCFSTAT_RXFFLMASK) == 0 ) { res = 0; } +#else + if (!(*(volatile unsigned long*)(SFPI_INTCON_BASEADDR + FBS_ISR) & + FBS_ISR_AR)) + + { + res = 0; + } +#endif else if ( pAsc->asc_con & ASCCON_FE ) { SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLRFE); |