| 0,0 → 1,148 |
|---|
| /* |
| * Copyright (C) 2005 Ondrej Palkovsky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup mips32 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <interrupt.h> |
| #include <arch/cp0.h> |
| #include <arch/drivers/serial.h> |
| #include <console/chardev.h> |
| #include <console/console.h> |
| |
| static chardev_t console; |
| static serial_t sconf[SERIAL_MAX]; |
| static bool kb_enabled; |
| |
| static void serial_write(chardev_t *d, const char ch) |
| { |
| serial_t *sd = (serial_t *)d->data; |
| |
| if (ch == '\n') |
| serial_write(d, '\r'); |
| /* Wait until transmit buffer empty */ |
| while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT))) |
| ; |
| SERIAL_WRITE(sd->port, ch); |
| } |
| |
| static void serial_enable(chardev_t *d) |
| { |
| kb_enabled = true; |
| } |
| |
| static void serial_disable(chardev_t *d) |
| { |
| kb_enabled = false; |
| } |
| |
| int serial_init(void) |
| { |
| int i = 0; |
| if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) { |
| sconf[i].port = SERIAL_COM1; |
| sconf[i].irq = SERIAL_COM1_IRQ; |
| /* Enable interrupt on available data */ |
| i++; |
| } |
| return i; |
| } |
| |
| /** Read character from serial port, wait until available */ |
| static char serial_do_read(chardev_t *dev) |
| { |
| serial_t *sd = (serial_t *)dev->data; |
| char ch; |
| |
| while (!(SERIAL_READ_LSR(sd->port) & 1)) |
| ; |
| ch = SERIAL_READ(sd->port); |
| |
| if (ch =='\r') |
| ch = '\n'; |
| return ch; |
| } |
| |
| |
| /** Process keyboard interrupt. Does not work in simics? */ |
| static void serial_interrupt(int n, void *stack) |
| { |
| serial_t *sd = (serial_t *)console.data; |
| char ch; |
| |
| if (!(SERIAL_READ_LSR(sd->port) & 1)) |
| return; |
| ch = SERIAL_READ(sd->port); |
| |
| if (ch =='\r') |
| ch = '\n'; |
| chardev_push_character(&console, ch); |
| } |
| |
| |
| |
| static chardev_operations_t serial_ops = { |
| .resume = serial_enable, |
| .suspend = serial_disable, |
| .write = serial_write, |
| .read = serial_do_read |
| }; |
| |
| iroutine old_timer; |
| /** Do polling on timer interrupt */ |
| static void timer_replace(int n, istate_t *istate) |
| { |
| old_timer(n, istate); |
| serial_interrupt(n, istate); |
| } |
| |
| void serial_console(void) |
| { |
| serial_t *sd = &sconf[0]; |
| |
| |
| chardev_initialize("serial_console", &console, &serial_ops); |
| console.data = sd; |
| kb_enabled = true; |
| |
| // int_register(2, "serial_drvr", serial_interrupt); |
| /* I don't know why, but the serial interrupts simply |
| * don't work on simics |
| */ |
| old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace); |
| |
| stdin = &console; |
| stdout = &console; |
| } |
| |
| /** @} |
| */ |
| |