diff options
Diffstat (limited to 'cpu/i386/serial.c')
| -rw-r--r-- | cpu/i386/serial.c | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/cpu/i386/serial.c b/cpu/i386/serial.c index 22c3c2a..f58b47c 100644 --- a/cpu/i386/serial.c +++ b/cpu/i386/serial.c @@ -1,7 +1,7 @@ /* * (C) Copyright 2002 * Daniel Engström, Omicron Ceti AB, daniel@omicron.se - * + * * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * @@ -81,7 +81,6 @@ #define asyncLSRRxFifoError1 0x80 - #if CONFIG_SERIAL_SOFTWARE_FIFO /*-----------------------------------------------------------------------------+ | Fifo @@ -100,7 +99,7 @@ static int serial_buffer_active=0; static int serial_div(int baudrate) { - + switch (baudrate) { case 1200: return 96; @@ -113,9 +112,9 @@ static int serial_div(int baudrate) case 57600: return 2; case 115200: - return 1; + return 1; } - + return 12; } @@ -132,7 +131,7 @@ int serial_init(void) volatile char val; int bdiv = serial_div(gd->baudrate); - + outb(0x80, UART0_BASE + UART_LCR); /* set DLAB bit */ outb(bdiv, UART0_BASE + UART_DLL); /* set baudrate divisor */ @@ -154,7 +153,7 @@ void serial_setbrg(void) DECLARE_GLOBAL_DATA_PTR; unsigned short bdiv; - + bdiv = serial_div(gd->baudrate); outb(0x80, UART0_BASE + UART_LCR); /* set DLAB bit */ @@ -199,7 +198,7 @@ int serial_getc(void) return serial_buffered_getc(); } #endif - + while (1) { #if defined(CONFIG_HW_WATCHDOG) WATCHDOG_RESET(); /* Reset HW Watchdog, if needed */ @@ -262,28 +261,28 @@ void serial_isr(void *arg) } else { space = buf_info.rx_get - rx_put; } - + while (inb(UART0_BASE + UART_LSR) & 1) { c = inb(UART0_BASE); if (space) { buf_info.rx_buffer[rx_put++] = c; space--; - + if (rx_put == buf_info.rx_get) { buf_info.rx_get++; if (rx_put == CONFIG_SERIAL_SOFTWARE_FIFO) { buf_info.rx_get = 0; } } - + if (rx_put == CONFIG_SERIAL_SOFTWARE_FIFO) { rx_put = 0; if (0 == buf_info.rx_get) { buf_info.rx_get = 1; } - + } - + } if (space < CONFIG_SERIAL_SOFTWARE_FIFO / 4) { /* Stop flow by setting RTS inactive */ @@ -309,20 +308,20 @@ void serial_buffered_init(void) buf_info.cts = 0; } - irq_install_handler ( VECNUM_U0 /*UART0 *//*int vec */ , + irq_install_handler ( VECNUM_U0 /*UART0 */ /*int vec */ , serial_isr /*interrupt_handler_t *handler */ , (void *) &buf_info /*void *arg */ ); /* Enable "RX Data Available" Interrupt on UART */ /* outb(inb(UART0_BASE + UART_IER) |0x01, UART0_BASE + UART_IER); */ outb(0x01, UART0_BASE + UART_IER); - + /* Set DTR and RTS active, enable interrupts */ outb(inb (UART0_BASE + UART_MCR) | 0x0b, UART0_BASE + UART_MCR); - + /* Setup UART FIFO: RX trigger level: 1 byte, Enable FIFO */ outb( /*(1 << 6) |*/ 1, UART0_BASE + UART_FCR); - + serial_buffer_active = 1; } @@ -348,7 +347,7 @@ void serial_buffered_putc (const char c) buf_info.cts = 1; } } - + #endif serial_putc (c); } @@ -508,4 +507,3 @@ void kgdb_interruptible(int yes) } #endif /* (CONFIG_KGDB_SER_INDEX & 2) */ #endif /* CFG_CMD_KGDB */ - |