Subversion Repositories HelenOS

Rev

Rev 2089 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
575 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2005 Ondrej Palkovsky
575 palkovsky 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1888 jermar 29
/** @addtogroup mips32 
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
575 palkovsky 35
#include <interrupt.h>
36
#include <arch/cp0.h>
2089 decky 37
#include <ipc/irq.h>
575 palkovsky 38
#include <arch/drivers/serial.h>
39
#include <console/chardev.h>
40
#include <console/console.h>
41
 
1936 decky 42
#define SERIAL_IRQ 2
43
 
44
static irq_t serial_irq;
575 palkovsky 45
static chardev_t console;
46
static serial_t sconf[SERIAL_MAX];
577 palkovsky 47
static bool kb_enabled;
575 palkovsky 48
 
49
static void serial_write(chardev_t *d, const char ch)
50
{
51
    serial_t *sd = (serial_t *)d->data;
52
 
53
    if (ch == '\n')
54
        serial_write(d, '\r');
55
    /* Wait until transmit buffer empty */
56
    while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT)))
57
        ;
58
    SERIAL_WRITE(sd->port, ch);
59
}
60
 
61
static void serial_enable(chardev_t *d)
62
{
577 palkovsky 63
    kb_enabled = true;
575 palkovsky 64
}
65
 
66
static void serial_disable(chardev_t *d)
67
{
577 palkovsky 68
    kb_enabled = false;
575 palkovsky 69
}
70
 
71
int serial_init(void)
72
{
73
    int i = 0;
74
    if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) {
75
        sconf[i].port = SERIAL_COM1;
76
        sconf[i].irq = SERIAL_COM1_IRQ;
77
        /* Enable interrupt on available data */
78
        i++;
79
    }
80
    return i;
81
}
82
 
607 palkovsky 83
/** Read character from serial port, wait until available */
84
static char serial_do_read(chardev_t *dev)
85
{
86
    serial_t *sd = (serial_t *)dev->data;
87
    char ch;
575 palkovsky 88
 
607 palkovsky 89
    while (!(SERIAL_READ_LSR(sd->port) & 1))
90
        ;
91
    ch = SERIAL_READ(sd->port);
92
 
93
    if (ch =='\r')
94
        ch = '\n';
95
    return ch;
96
}
97
 
1936 decky 98
static void serial_handler(void)
575 palkovsky 99
{
1936 decky 100
    serial_t *sd = (serial_t *) console.data;
575 palkovsky 101
    char ch;
102
 
103
    if (!(SERIAL_READ_LSR(sd->port) & 1))
104
        return;
105
    ch = SERIAL_READ(sd->port);
106
 
107
    if (ch =='\r')
108
        ch = '\n';
109
    chardev_push_character(&console, ch);
110
}
111
 
1936 decky 112
/** Process keyboard interrupt. Does not work in simics? */
113
static void serial_irq_handler(irq_t *irq, void *arg, ...)
114
{
115
    if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
116
        ipc_irq_send_notif(irq);
117
    else
118
        serial_handler();
119
}
575 palkovsky 120
 
1936 decky 121
static irq_ownership_t serial_claim(void)
122
{
123
    return IRQ_ACCEPT;
124
}
607 palkovsky 125
 
126
static chardev_operations_t serial_ops = {
127
    .resume = serial_enable,
128
    .suspend = serial_disable,
129
    .write = serial_write,
130
    .read = serial_do_read
131
};
132
 
1936 decky 133
void serial_console(devno_t devno)
575 palkovsky 134
{
135
    serial_t *sd = &sconf[0];
136
 
137
 
138
    chardev_initialize("serial_console", &console, &serial_ops);
139
    console.data = sd;
577 palkovsky 140
    kb_enabled = true;
1936 decky 141
 
142
    irq_initialize(&serial_irq);
143
    serial_irq.devno = devno;
144
    serial_irq.inr = SERIAL_IRQ;
145
    serial_irq.claim = serial_claim;
146
    serial_irq.handler = serial_irq_handler;
147
    irq_register(&serial_irq);
575 palkovsky 148
 
149
    /* I don't know why, but the serial interrupts simply
150
     * don't work on simics
151
     */
1955 decky 152
    virtual_timer_fnc = &serial_handler;
575 palkovsky 153
 
606 palkovsky 154
    stdin = &console;
155
    stdout = &console;
575 palkovsky 156
}
1702 cejka 157
 
1888 jermar 158
/** @}
1702 cejka 159
 */