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1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * 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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 *
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 * It takes care of low-level keyboard functions.
1702 cejka 37
 */
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1842 jermar 39
#include <genarch/kbd/i8042.h>
1843 jermar 40
#include <genarch/kbd/key.h>
1842 jermar 41
#include <genarch/kbd/scanc.h>
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#include <genarch/kbd/scanc_pc.h>
894 jermar 43
#include <arch/drivers/i8042.h>
1 jermar 44
#include <cpu.h>
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#include <arch/asm.h>
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#include <arch.h>
511 jermar 47
#include <console/chardev.h>
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#include <console/console.h>
576 palkovsky 49
#include <interrupt.h>
1956 decky 50
#include <sysinfo/sysinfo.h>
2089 decky 51
#include <ipc/irq.h>
1 jermar 52
 
1754 jermar 53
/* Keyboard commands. */
512 jermar 54
#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 58
/*
893 jermar 59
 * 60  Write 8042 Command Byte: next data byte written to port 60h is
895 jermar 60
 *     placed in 8042 command register. Format:
893 jermar 61
 *
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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 72
 
893 jermar 73
#define i8042_SET_COMMAND   0x60
1759 palkovsky 74
#define i8042_COMMAND       0x69
894 jermar 75
 
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#define i8042_BUFFER_FULL_MASK  0x01
2321 decky 77
#define i8042_WAIT_MASK         0x02
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#define i8042_MOUSE_DATA        0x20
670 vana 79
 
575 palkovsky 80
static void i8042_suspend(chardev_t *);
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static void i8042_resume(chardev_t *);
511 jermar 82
 
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static chardev_operations_t ops = {
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    .suspend = i8042_suspend,
878 vana 85
    .resume = i8042_resume,
1896 jermar 86
    .read = i8042_key_read
511 jermar 87
};
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1956 decky 89
/** Structure for i8042's IRQ. */
1957 decky 90
static irq_t i8042_kbd_irq;
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static irq_t i8042_mouse_irq;
576 palkovsky 92
 
1474 palkovsky 93
void i8042_grab(void)
1 jermar 94
{
1956 decky 95
    ipl_t ipl = interrupts_disable();
96
 
1957 decky 97
    spinlock_lock(&i8042_kbd_irq.lock);
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    i8042_kbd_irq.notif_cfg.notify = false;
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    spinlock_unlock(&i8042_kbd_irq.lock);
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101
    spinlock_lock(&i8042_mouse_irq.lock);
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    i8042_mouse_irq.notif_cfg.notify = false;
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    spinlock_unlock(&i8042_mouse_irq.lock);
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1956 decky 105
    interrupts_restore(ipl);
1474 palkovsky 106
}
1956 decky 107
 
1474 palkovsky 108
void i8042_release(void)
109
{
1956 decky 110
    ipl_t ipl = interrupts_disable();
1957 decky 111
 
112
    spinlock_lock(&i8042_kbd_irq.lock);
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    if (i8042_kbd_irq.notif_cfg.answerbox)
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        i8042_kbd_irq.notif_cfg.notify = true;
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    spinlock_unlock(&i8042_kbd_irq.lock);
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117
    spinlock_lock(&i8042_mouse_irq.lock);
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    if (i8042_mouse_irq.notif_cfg.answerbox)
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        i8042_mouse_irq.notif_cfg.notify = true;
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    spinlock_unlock(&i8042_mouse_irq.lock);
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1956 decky 122
    interrupts_restore(ipl);
1474 palkovsky 123
}
670 vana 124
 
1956 decky 125
static irq_ownership_t i8042_claim(void)
1474 palkovsky 126
{
1956 decky 127
    return IRQ_ACCEPT;
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}
1474 palkovsky 129
 
2321 decky 130
static void i8042_irq_handler(irq_t *irq, void *arg, ...)
1956 decky 131
{
132
    if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
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        ipc_irq_send_notif(irq);
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    else {
2321 decky 135
        uint8_t data;
1956 decky 136
        uint8_t status;
137
 
138
        while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
2321 decky 139
            data = i8042_data_read();
1956 decky 140
 
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            if ((status & i8042_MOUSE_DATA))
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                continue;
2321 decky 143
 
144
            if (data & KEY_RELEASE)
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                key_released(data ^ KEY_RELEASE);
1956 decky 146
            else
2321 decky 147
                key_pressed(data);
1956 decky 148
        }
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    }
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}
1474 palkovsky 151
 
1956 decky 152
/** Initialize i8042. */
1957 decky 153
void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr)
1956 decky 154
{
575 palkovsky 155
    chardev_initialize("i8042_kbd", &kbrd, &ops);
511 jermar 156
    stdin = &kbrd;
1956 decky 157
 
1957 decky 158
    irq_initialize(&i8042_kbd_irq);
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    i8042_kbd_irq.devno = kbd_devno;
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    i8042_kbd_irq.inr = kbd_inr;
161
    i8042_kbd_irq.claim = i8042_claim;
2321 decky 162
    i8042_kbd_irq.handler = i8042_irq_handler;
1957 decky 163
    irq_register(&i8042_kbd_irq);
1956 decky 164
 
1957 decky 165
    irq_initialize(&i8042_mouse_irq);
166
    i8042_mouse_irq.devno = mouse_devno;
167
    i8042_mouse_irq.inr = mouse_inr;
168
    i8042_mouse_irq.claim = i8042_claim;
2321 decky 169
    i8042_mouse_irq.handler = i8042_irq_handler;
1957 decky 170
    irq_register(&i8042_mouse_irq);
1956 decky 171
 
1957 decky 172
    trap_virtual_enable_irqs(1 << kbd_inr);
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    trap_virtual_enable_irqs(1 << mouse_inr);
174
 
1194 vana 175
    /*
1195 jermar 176
     * Clear input buffer.
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     * Number of iterations is limited to prevent infinite looping.
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     */
1956 decky 179
    int i;
1195 jermar 180
    for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
1194 vana 181
        i8042_data_read();
1753 palkovsky 182
    }
1956 decky 183
 
184
    sysinfo_set_item_val("kbd", NULL, true);
1957 decky 185
    sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);
186
    sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);
1956 decky 187
 
1957 decky 188
    sysinfo_set_item_val("mouse", NULL, true);
189
    sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);
190
    sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);
191
 
1956 decky 192
    i8042_grab();
1 jermar 193
}
508 jermar 194
 
511 jermar 195
/* Called from getc(). */
575 palkovsky 196
void i8042_resume(chardev_t *d)
511 jermar 197
{
198
}
199
 
200
/* Called from getc(). */
575 palkovsky 201
void i8042_suspend(chardev_t *d)
511 jermar 202
{
203
}
878 vana 204
 
1896 jermar 205
char i8042_key_read(chardev_t *d)
878 vana 206
{
207
    char ch;   
208
 
894 jermar 209
    while(!(ch = active_read_buff_read())) {
1780 jermar 210
        uint8_t x;
1753 palkovsky 211
        while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))
894 jermar 212
            ;
213
        x = i8042_data_read();
1842 jermar 214
        if (x & KEY_RELEASE)
215
            key_released(x ^ KEY_RELEASE);
216
        else
217
            active_read_key_pressed(x);
878 vana 218
    }
219
    return ch;
220
}
895 jermar 221
 
222
/** Poll for key press and release events.
223
 *
224
 * This function can be used to implement keyboard polling.
225
 */
226
void i8042_poll(void)
227
{
1780 jermar 228
    uint8_t x;
895 jermar 229
 
230
    while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
231
        x = i8042_data_read();
1842 jermar 232
        if (x & KEY_RELEASE)
233
            key_released(x ^ KEY_RELEASE);
234
        else
235
            key_pressed(x);
895 jermar 236
    }
237
}
1702 cejka 238
 
1754 jermar 239
/** @}
1702 cejka 240
 */