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1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
4
 *
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 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1754 jermar 29
/** @addtogroup genarch
1702 cejka 30
 * @{
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 */
1754 jermar 32
/**
1757 jermar 33
 * @file
1754 jermar 34
 * @brief   i8042 processor driver.
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 *
36
 * It takes care of low-level keyboard functions.
1702 cejka 37
 */
38
 
1842 jermar 39
#include <genarch/kbd/i8042.h>
3665 rimsky 40
#ifdef ia64
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#include <arch/drivers/kbd.h>
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#endif
1843 jermar 43
#include <genarch/kbd/key.h>
1842 jermar 44
#include <genarch/kbd/scanc.h>
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#include <genarch/kbd/scanc_pc.h>
894 jermar 46
#include <arch/drivers/i8042.h>
1 jermar 47
#include <cpu.h>
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#include <arch/asm.h>
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#include <arch.h>
511 jermar 50
#include <console/chardev.h>
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#include <console/console.h>
576 palkovsky 52
#include <interrupt.h>
1956 decky 53
#include <sysinfo/sysinfo.h>
2089 decky 54
#include <ipc/irq.h>
1 jermar 55
 
1754 jermar 56
/* Keyboard commands. */
512 jermar 57
#define KBD_ENABLE  0xf4
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#define KBD_DISABLE 0xf5
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#define KBD_ACK     0xfa
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670 vana 61
/*
893 jermar 62
 * 60  Write 8042 Command Byte: next data byte written to port 60h is
895 jermar 63
 *     placed in 8042 command register. Format:
893 jermar 64
 *
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 *    |7|6|5|4|3|2|1|0|8042 Command Byte
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 *     | | | | | | | `---- 1=enable output register full interrupt
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 *     | | | | | | `----- should be 0
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 *     | | | | | `------ 1=set status register system, 0=clear
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 *     | | | | `------- 1=override keyboard inhibit, 0=allow inhibit
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 *     | | | `-------- disable keyboard I/O by driving clock line low
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 *     | | `--------- disable auxiliary device, drives clock line low
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 *     | `---------- IBM scancode translation 0=AT, 1=PC/XT
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 *     `----------- reserved, should be 0
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 */
670 vana 75
 
893 jermar 76
#define i8042_SET_COMMAND   0x60
1759 palkovsky 77
#define i8042_COMMAND       0x69
894 jermar 78
 
79
#define i8042_BUFFER_FULL_MASK  0x01
2321 decky 80
#define i8042_WAIT_MASK         0x02
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#define i8042_MOUSE_DATA        0x20
670 vana 82
 
575 palkovsky 83
static void i8042_suspend(chardev_t *);
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static void i8042_resume(chardev_t *);
511 jermar 85
 
86
static chardev_operations_t ops = {
87
    .suspend = i8042_suspend,
878 vana 88
    .resume = i8042_resume,
1896 jermar 89
    .read = i8042_key_read
511 jermar 90
};
91
 
1956 decky 92
/** Structure for i8042's IRQ. */
1957 decky 93
static irq_t i8042_kbd_irq;
94
static irq_t i8042_mouse_irq;
576 palkovsky 95
 
1474 palkovsky 96
void i8042_grab(void)
1 jermar 97
{
1956 decky 98
    ipl_t ipl = interrupts_disable();
99
 
1957 decky 100
    spinlock_lock(&i8042_kbd_irq.lock);
101
    i8042_kbd_irq.notif_cfg.notify = false;
102
    spinlock_unlock(&i8042_kbd_irq.lock);
103
 
104
    spinlock_lock(&i8042_mouse_irq.lock);
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    i8042_mouse_irq.notif_cfg.notify = false;
106
    spinlock_unlock(&i8042_mouse_irq.lock);
107
 
1956 decky 108
    interrupts_restore(ipl);
1474 palkovsky 109
}
1956 decky 110
 
1474 palkovsky 111
void i8042_release(void)
112
{
1956 decky 113
    ipl_t ipl = interrupts_disable();
1957 decky 114
 
115
    spinlock_lock(&i8042_kbd_irq.lock);
116
    if (i8042_kbd_irq.notif_cfg.answerbox)
117
        i8042_kbd_irq.notif_cfg.notify = true;
118
    spinlock_unlock(&i8042_kbd_irq.lock);
119
 
120
    spinlock_lock(&i8042_mouse_irq.lock);
121
    if (i8042_mouse_irq.notif_cfg.answerbox)
122
        i8042_mouse_irq.notif_cfg.notify = true;
123
    spinlock_unlock(&i8042_mouse_irq.lock);
124
 
1956 decky 125
    interrupts_restore(ipl);
1474 palkovsky 126
}
670 vana 127
 
1956 decky 128
static irq_ownership_t i8042_claim(void)
1474 palkovsky 129
{
1956 decky 130
    return IRQ_ACCEPT;
131
}
1474 palkovsky 132
 
2321 decky 133
static void i8042_irq_handler(irq_t *irq, void *arg, ...)
1956 decky 134
{
135
    if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
136
        ipc_irq_send_notif(irq);
137
    else {
2321 decky 138
        uint8_t data;
1956 decky 139
        uint8_t status;
140
 
141
        while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
2321 decky 142
            data = i8042_data_read();
1956 decky 143
 
144
            if ((status & i8042_MOUSE_DATA))
145
                continue;
2321 decky 146
 
147
            if (data & KEY_RELEASE)
148
                key_released(data ^ KEY_RELEASE);
1956 decky 149
            else
2321 decky 150
                key_pressed(data);
1956 decky 151
        }
152
    }
153
}
1474 palkovsky 154
 
1956 decky 155
/** Initialize i8042. */
1957 decky 156
void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr)
1956 decky 157
{
575 palkovsky 158
    chardev_initialize("i8042_kbd", &kbrd, &ops);
511 jermar 159
    stdin = &kbrd;
1956 decky 160
 
1957 decky 161
    irq_initialize(&i8042_kbd_irq);
162
    i8042_kbd_irq.devno = kbd_devno;
163
    i8042_kbd_irq.inr = kbd_inr;
164
    i8042_kbd_irq.claim = i8042_claim;
2321 decky 165
    i8042_kbd_irq.handler = i8042_irq_handler;
1957 decky 166
    irq_register(&i8042_kbd_irq);
1956 decky 167
 
1957 decky 168
    irq_initialize(&i8042_mouse_irq);
169
    i8042_mouse_irq.devno = mouse_devno;
170
    i8042_mouse_irq.inr = mouse_inr;
171
    i8042_mouse_irq.claim = i8042_claim;
2321 decky 172
    i8042_mouse_irq.handler = i8042_irq_handler;
1957 decky 173
    irq_register(&i8042_mouse_irq);
2516 vana 174
#ifndef ia64    
1957 decky 175
    trap_virtual_enable_irqs(1 << kbd_inr);
176
    trap_virtual_enable_irqs(1 << mouse_inr);
2516 vana 177
#endif  
1194 vana 178
    /*
1195 jermar 179
     * Clear input buffer.
180
     * Number of iterations is limited to prevent infinite looping.
181
     */
1956 decky 182
    int i;
1195 jermar 183
    for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
1194 vana 184
        i8042_data_read();
1753 palkovsky 185
    }
1956 decky 186
 
187
    sysinfo_set_item_val("kbd", NULL, true);
1957 decky 188
    sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);
189
    sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);
3665 rimsky 190
#ifdef KBD_LEGACY
191
    sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);
192
#endif  
1957 decky 193
    sysinfo_set_item_val("mouse", NULL, true);
194
    sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);
195
    sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);
196
 
1956 decky 197
    i8042_grab();
1 jermar 198
}
508 jermar 199
 
511 jermar 200
/* Called from getc(). */
575 palkovsky 201
void i8042_resume(chardev_t *d)
511 jermar 202
{
203
}
204
 
205
/* Called from getc(). */
575 palkovsky 206
void i8042_suspend(chardev_t *d)
511 jermar 207
{
208
}
878 vana 209
 
1896 jermar 210
char i8042_key_read(chardev_t *d)
878 vana 211
{
212
    char ch;   
213
 
894 jermar 214
    while(!(ch = active_read_buff_read())) {
1780 jermar 215
        uint8_t x;
1753 palkovsky 216
        while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))
894 jermar 217
            ;
218
        x = i8042_data_read();
1842 jermar 219
        if (x & KEY_RELEASE)
220
            key_released(x ^ KEY_RELEASE);
221
        else
222
            active_read_key_pressed(x);
878 vana 223
    }
224
    return ch;
225
}
895 jermar 226
 
227
/** Poll for key press and release events.
228
 *
229
 * This function can be used to implement keyboard polling.
230
 */
231
void i8042_poll(void)
232
{
1780 jermar 233
    uint8_t x;
895 jermar 234
 
235
    while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
236
        x = i8042_data_read();
1842 jermar 237
        if (x & KEY_RELEASE)
238
            key_released(x ^ KEY_RELEASE);
239
        else
240
            key_pressed(x);
895 jermar 241
    }
242
}
1702 cejka 243
 
1754 jermar 244
/** @}
1702 cejka 245
 */