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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 575 | palkovsky | 1 | /* |
| 2 | * Copyright (C) 2005 Ondrej Palkovsky |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <interrupt.h> |
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| 30 | #include <arch/cp0.h> |
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| 31 | #include <arch/drivers/serial.h> |
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| 32 | #include <console/chardev.h> |
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| 33 | #include <console/console.h> |
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| 34 | |||
| 35 | static chardev_t console; |
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| 36 | |||
| 37 | static serial_t sconf[SERIAL_MAX]; |
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| 38 | |||
| 39 | static void serial_write(chardev_t *d, const char ch) |
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| 40 | { |
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| 41 | int i; |
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| 42 | serial_t *sd = (serial_t *)d->data; |
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| 43 | |||
| 44 | if (ch == '\n') |
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| 45 | serial_write(d, '\r'); |
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| 46 | /* Wait until transmit buffer empty */ |
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| 47 | while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT))) |
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| 48 | ; |
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| 49 | SERIAL_WRITE(sd->port, ch); |
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| 50 | } |
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| 51 | |||
| 52 | static void serial_enable(chardev_t *d) |
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| 53 | { |
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| 54 | } |
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| 55 | |||
| 56 | static void serial_disable(chardev_t *d) |
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| 57 | { |
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| 58 | } |
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| 59 | |||
| 60 | int serial_init(void) |
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| 61 | { |
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| 62 | int i = 0; |
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| 63 | if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) { |
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| 64 | sconf[i].port = SERIAL_COM1; |
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| 65 | sconf[i].irq = SERIAL_COM1_IRQ; |
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| 66 | /* Enable interrupt on available data */ |
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| 67 | i++; |
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| 68 | } |
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| 69 | return i; |
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| 70 | } |
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| 71 | |||
| 72 | static chardev_operations_t serial_ops = { |
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| 73 | .resume = serial_enable, |
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| 74 | .suspend = serial_disable, |
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| 75 | .write = serial_write |
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| 76 | }; |
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| 77 | |||
| 78 | /** Process keyboard interrupt. Does not work in simics? */ |
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| 79 | static void serial_interrupt(int n, void *stack) |
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| 80 | { |
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| 81 | serial_t *sd = (serial_t *)console.data; |
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| 82 | char ch; |
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| 83 | |||
| 84 | if (!(SERIAL_READ_LSR(sd->port) & 1)) |
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| 85 | return; |
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| 86 | ch = SERIAL_READ(sd->port); |
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| 87 | |||
| 88 | if (ch =='\r') |
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| 89 | ch = '\n'; |
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| 90 | chardev_push_character(&console, ch); |
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| 91 | } |
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| 92 | |||
| 93 | |||
| 94 | iroutine old_timer; |
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| 95 | /** Do polling on timer interrupt */ |
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| 96 | static void timer_replace(int n, void *stack) |
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| 97 | { |
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| 98 | old_timer(n, stack); |
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| 99 | serial_interrupt(n, stack); |
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| 100 | } |
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| 101 | |||
| 102 | #include <print.h> |
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| 103 | chardev_t * serial_console(void) |
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| 104 | { |
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| 105 | serial_t *sd = &sconf[0]; |
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| 106 | |||
| 107 | |||
| 108 | chardev_initialize("serial_console", &console, &serial_ops); |
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| 109 | console.data = sd; |
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| 110 | |||
| 111 | // exc_register(2, "serial_drvr", serial_interrupt); |
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| 112 | /* I don't know why, but the serial interrupts simply |
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| 113 | * don't work on simics |
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| 114 | */ |
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| 115 | old_timer = exc_register(TIMER_IRQ, "serial_drvr_poll", timer_replace); |
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| 116 | |||
| 117 | |||
| 118 | return &console; |
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| 119 | |||
| 120 | } |