0,0 → 1,120 |
/* |
* 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. |
*/ |
|
#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 void serial_write(chardev_t *d, const char ch) |
{ |
int i; |
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) |
{ |
} |
|
static void serial_disable(chardev_t *d) |
{ |
} |
|
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; |
} |
|
static chardev_operations_t serial_ops = { |
.resume = serial_enable, |
.suspend = serial_disable, |
.write = serial_write |
}; |
|
/** 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); |
} |
|
|
iroutine old_timer; |
/** Do polling on timer interrupt */ |
static void timer_replace(int n, void *stack) |
{ |
old_timer(n, stack); |
serial_interrupt(n, stack); |
} |
|
#include <print.h> |
chardev_t * serial_console(void) |
{ |
serial_t *sd = &sconf[0]; |
|
|
chardev_initialize("serial_console", &console, &serial_ops); |
console.data = sd; |
|
// exc_register(2, "serial_drvr", serial_interrupt); |
/* I don't know why, but the serial interrupts simply |
* don't work on simics |
*/ |
old_timer = exc_register(TIMER_IRQ, "serial_drvr_poll", timer_replace); |
|
|
return &console; |
|
} |