WebSVN – HelenOS – Diff – /tags/0.1.1/kernel/genarch/src/i8042/i8042.c


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * 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 <genarch/i8042/i8042.h>
#include <arch/drivers/i8042.h>
#include <arch/interrupt.h>
#include <cpu.h>
#include <arch/asm.h>
#include <arch.h>
#include <synch/spinlock.h>
#include <typedefs.h>
#include <console/chardev.h>
#include <console/console.h>
#include <macros.h>
#include <interrupt.h>
 
/**
 * i8042 processor driver.
 * It takes care of low-level keyboard functions.
 */
 
/** Keyboard commands. */
#define KBD_ENABLE  0xf4
#define KBD_DISABLE 0xf5
#define KBD_ACK     0xfa
 
/*
 * 60  Write 8042 Command Byte: next data byte written to port 60h is
 *     placed in 8042 command register. Format:
 *
 *    |7|6|5|4|3|2|1|0|8042 Command Byte
 *     | | | | | | | `---- 1=enable output register full interrupt
 *     | | | | | | `----- should be 0
 *     | | | | | `------ 1=set status register system, 0=clear
 *     | | | | `------- 1=override keyboard inhibit, 0=allow inhibit
 *     | | | `-------- disable keyboard I/O by driving clock line low
 *     | | `--------- disable auxiliary device, drives clock line low
 *     | `---------- IBM scancode translation 0=AT, 1=PC/XT
 *     `----------- reserved, should be 0
 */
 
#define i8042_SET_COMMAND   0x60
#define i8042_COMMAND       0x49
 
#define i8042_BUFFER_FULL_MASK  0x01
#define i8042_WAIT_MASK     0x02
 
#define SPECIAL     '?'
#define KEY_RELEASE 0x80
 
/**
 * These codes read from i8042 data register are silently ignored.
 */
#define IGNORE_CODE 0x7f
 
static void key_released(__u8 sc);
static void key_pressed(__u8 sc);
static char key_read(chardev_t *d);
 
#define PRESSED_SHIFT       (1<<0)
#define PRESSED_CAPSLOCK    (1<<1)
#define LOCKED_CAPSLOCK     (1<<0)
 
#define ACTIVE_READ_BUFF_SIZE 16    /* Must be power of 2 */
 
static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];
 
SPINLOCK_INITIALIZE(keylock);       /**< keylock protects keyflags and lockflags. */
static volatile int keyflags;       /**< Tracking of multiple keypresses. */
static volatile int lockflags;      /**< Tracking of multiple keys lockings. */
 
static void i8042_suspend(chardev_t *);
static void i8042_resume(chardev_t *);
 
static chardev_t kbrd;
static chardev_operations_t ops = {
    .suspend = i8042_suspend,
    .resume = i8042_resume,
    .read = key_read
};
 
/** Primary meaning of scancodes. */
static char sc_primary_map[] = {
    SPECIAL, /* 0x00 */
    SPECIAL, /* 0x01 - Esc */
    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
    '\b', /* 0x0e - Backspace */
    '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
    SPECIAL, /* 0x1d - LCtrl */
    'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
    '`',
    SPECIAL, /* 0x2a - LShift */
    '\\',
    'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
    SPECIAL, /* 0x36 - RShift */
    '*',
    SPECIAL, /* 0x38 - LAlt */
    ' ',
    SPECIAL, /* 0x3a - CapsLock */
    SPECIAL, /* 0x3b - F1 */
    SPECIAL, /* 0x3c - F2 */
    SPECIAL, /* 0x3d - F3 */
    SPECIAL, /* 0x3e - F4 */
    SPECIAL, /* 0x3f - F5 */
    SPECIAL, /* 0x40 - F6 */
    SPECIAL, /* 0x41 - F7 */
    SPECIAL, /* 0x42 - F8 */
    SPECIAL, /* 0x43 - F9 */
    SPECIAL, /* 0x44 - F10 */
    SPECIAL, /* 0x45 - NumLock */
    SPECIAL, /* 0x46 - ScrollLock */
    '7', '8', '9', '-',
    '4', '5', '6', '+',
    '1', '2', '3',
    '0', '.',
    SPECIAL, /* 0x54 - Alt-SysRq */
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
    SPECIAL, /* 0x57 - F11 */
    SPECIAL, /* 0x58 - F12 */
    SPECIAL, /* 0x59 */
    SPECIAL, /* 0x5a */
    SPECIAL, /* 0x5b */
    SPECIAL, /* 0x5c */
    SPECIAL, /* 0x5d */
    SPECIAL, /* 0x5e */
    SPECIAL, /* 0x5f */
    SPECIAL, /* 0x60 */
    SPECIAL, /* 0x61 */
    SPECIAL, /* 0x62 */
    SPECIAL, /* 0x63 */
    SPECIAL, /* 0x64 */
    SPECIAL, /* 0x65 */
    SPECIAL, /* 0x66 */
    SPECIAL, /* 0x67 */
    SPECIAL, /* 0x68 */
    SPECIAL, /* 0x69 */
    SPECIAL, /* 0x6a */
    SPECIAL, /* 0x6b */
    SPECIAL, /* 0x6c */
    SPECIAL, /* 0x6d */
    SPECIAL, /* 0x6e */
    SPECIAL, /* 0x6f */
    SPECIAL, /* 0x70 */
    SPECIAL, /* 0x71 */
    SPECIAL, /* 0x72 */
    SPECIAL, /* 0x73 */
    SPECIAL, /* 0x74 */
    SPECIAL, /* 0x75 */
    SPECIAL, /* 0x76 */
    SPECIAL, /* 0x77 */
    SPECIAL, /* 0x78 */
    SPECIAL, /* 0x79 */
    SPECIAL, /* 0x7a */
    SPECIAL, /* 0x7b */
    SPECIAL, /* 0x7c */
    SPECIAL, /* 0x7d */
    SPECIAL, /* 0x7e */
    SPECIAL, /* 0x7f */
};
 
/** Secondary meaning of scancodes. */
static char sc_secondary_map[] = {
    SPECIAL, /* 0x00 */
    SPECIAL, /* 0x01 - Esc */
    '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
    SPECIAL, /* 0x0e - Backspace */
    '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
    SPECIAL, /* 0x1d - LCtrl */
    'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
    '~',
    SPECIAL, /* 0x2a - LShift */
    '|',
    'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
    SPECIAL, /* 0x36 - RShift */
    '*',
    SPECIAL, /* 0x38 - LAlt */
    ' ',
    SPECIAL, /* 0x3a - CapsLock */
    SPECIAL, /* 0x3b - F1 */
    SPECIAL, /* 0x3c - F2 */
    SPECIAL, /* 0x3d - F3 */
    SPECIAL, /* 0x3e - F4 */
    SPECIAL, /* 0x3f - F5 */
    SPECIAL, /* 0x40 - F6 */
    SPECIAL, /* 0x41 - F7 */
    SPECIAL, /* 0x42 - F8 */
    SPECIAL, /* 0x43 - F9 */
    SPECIAL, /* 0x44 - F10 */
    SPECIAL, /* 0x45 - NumLock */
    SPECIAL, /* 0x46 - ScrollLock */
    '7', '8', '9', '-',
    '4', '5', '6', '+',
    '1', '2', '3',
    '0', '.',
    SPECIAL, /* 0x54 - Alt-SysRq */
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
    SPECIAL, /* 0x57 - F11 */
    SPECIAL, /* 0x58 - F12 */
    SPECIAL, /* 0x59 */
    SPECIAL, /* 0x5a */
    SPECIAL, /* 0x5b */
    SPECIAL, /* 0x5c */
    SPECIAL, /* 0x5d */
    SPECIAL, /* 0x5e */
    SPECIAL, /* 0x5f */
    SPECIAL, /* 0x60 */
    SPECIAL, /* 0x61 */
    SPECIAL, /* 0x62 */
    SPECIAL, /* 0x63 */
    SPECIAL, /* 0x64 */
    SPECIAL, /* 0x65 */
    SPECIAL, /* 0x66 */
    SPECIAL, /* 0x67 */
    SPECIAL, /* 0x68 */
    SPECIAL, /* 0x69 */
    SPECIAL, /* 0x6a */
    SPECIAL, /* 0x6b */
    SPECIAL, /* 0x6c */
    SPECIAL, /* 0x6d */
    SPECIAL, /* 0x6e */
    SPECIAL, /* 0x6f */
    SPECIAL, /* 0x70 */
    SPECIAL, /* 0x71 */
    SPECIAL, /* 0x72 */
    SPECIAL, /* 0x73 */
    SPECIAL, /* 0x74 */
    SPECIAL, /* 0x75 */
    SPECIAL, /* 0x76 */
    SPECIAL, /* 0x77 */
    SPECIAL, /* 0x78 */
    SPECIAL, /* 0x79 */
    SPECIAL, /* 0x7a */
    SPECIAL, /* 0x7b */
    SPECIAL, /* 0x7c */
    SPECIAL, /* 0x7d */
    SPECIAL, /* 0x7e */
    SPECIAL, /* 0x7f */
};
 
static void i8042_interrupt(int n, istate_t *istate);
static void i8042_wait(void);
 
/** Initialize i8042. */
void i8042_init(void)
{
    int i;
 
    exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
    i8042_wait();
    i8042_command_write(i8042_SET_COMMAND);
    i8042_wait();
    i8042_data_write(i8042_COMMAND);
    i8042_wait();
 
    trap_virtual_enable_irqs(1<<IRQ_KBD);
    chardev_initialize("i8042_kbd", &kbrd, &ops);
    stdin = &kbrd;
 
    /*
     * Clear input buffer.
     * Number of iterations is limited to prevent infinite looping.
     */
    for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
        i8042_data_read();
    }  
}
 
/** Process i8042 interrupt.
 *
 * @param n Interrupt vector.
 * @param stack Interrupted stack.
 */
void i8042_interrupt(int n, istate_t *istate)
{
    __u8 x;
 
    trap_virtual_eoi();
    x = i8042_data_read();
    if (x & KEY_RELEASE)
        key_released(x ^ KEY_RELEASE);
    else
        key_pressed(x);
}
 
/** Wait until the controller reads its data. */
void i8042_wait(void) {
    while (i8042_status_read() & i8042_WAIT_MASK) {
        /* wait */
    }
}
 
/** Process release of key.
 *
 * @param sc Scancode of the key being released.
 */
void key_released(__u8 sc)
{
    spinlock_lock(&keylock);
    switch (sc) {
        case SC_LSHIFT:
        case SC_RSHIFT:
        keyflags &= ~PRESSED_SHIFT;
        break;
        case SC_CAPSLOCK:
        keyflags &= ~PRESSED_CAPSLOCK;
        if (lockflags & LOCKED_CAPSLOCK)
            lockflags &= ~LOCKED_CAPSLOCK;
        else
            lockflags |= LOCKED_CAPSLOCK;
        break;
        default:
        break;
    }
    spinlock_unlock(&keylock);
}
 
/** Process keypress.
 *
 * @param sc Scancode of the key being pressed.
 */
void key_pressed(__u8 sc)
{
    char *map = sc_primary_map;
    char ascii = sc_primary_map[sc];
    bool shift, capslock;
    bool letter = false;
 
    spinlock_lock(&keylock);
    switch (sc) {
    case SC_LSHIFT:
    case SC_RSHIFT:
            keyflags |= PRESSED_SHIFT;
        break;
    case SC_CAPSLOCK:
        keyflags |= PRESSED_CAPSLOCK;
        break;
    case SC_SPEC_ESCAPE:
        break;
    case SC_LEFTARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x44);
        break;
    case SC_RIGHTARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x43);
        break;
    case SC_UPARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x41);
        break;
    case SC_DOWNARR:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x42);
        break;
    case SC_HOME:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x4f);
        chardev_push_character(&kbrd, 0x48);
        break;
    case SC_END:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x4f);
        chardev_push_character(&kbrd, 0x46);
        break;
    case SC_DELETE:
        chardev_push_character(&kbrd, 0x1b);
        chardev_push_character(&kbrd, 0x5b);
        chardev_push_character(&kbrd, 0x33);
        chardev_push_character(&kbrd, 0x7e);
        break;
    default:
            letter = is_lower(ascii);
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
        shift = keyflags & PRESSED_SHIFT;
        if (letter && capslock)
            shift = !shift;
        if (shift)
            map = sc_secondary_map;
        chardev_push_character(&kbrd, map[sc]);
        break;
    }
    spinlock_unlock(&keylock);
}
 
/* Called from getc(). */
void i8042_resume(chardev_t *d)
{
}
 
/* Called from getc(). */
void i8042_suspend(chardev_t *d)
{
}
 
static __u8 active_read_buff_read(void)
{
    static int i=0;
    i &= (ACTIVE_READ_BUFF_SIZE-1);
    if(!active_read_buff[i]) {
        return 0;
    }
    return active_read_buff[i++];
}
 
static void active_read_buff_write(__u8 ch)
{
    static int i=0;
    active_read_buff[i] = ch;
    i++;
    i &= (ACTIVE_READ_BUFF_SIZE-1);
    active_read_buff[i]=0;
}
 
 
static void active_read_key_pressed(__u8 sc)
{
    char *map = sc_primary_map;
    char ascii = sc_primary_map[sc];
    bool shift, capslock;
    bool letter = false;
 
    /*spinlock_lock(&keylock);*/
    switch (sc) {
    case SC_LSHIFT:
    case SC_RSHIFT:
            keyflags |= PRESSED_SHIFT;
        break;
    case SC_CAPSLOCK:
        keyflags |= PRESSED_CAPSLOCK;
        break;
    case SC_SPEC_ESCAPE:
        break;
    case SC_LEFTARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x44);
        break;
    case SC_RIGHTARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x43);
        break;
    case SC_UPARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x41);
        break;
    case SC_DOWNARR:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x42);
        break;
    case SC_HOME:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x4f);
        active_read_buff_write(0x48);
        break;
    case SC_END:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x4f);
        active_read_buff_write(0x46);
        break;
    case SC_DELETE:
        active_read_buff_write(0x1b);
        active_read_buff_write(0x5b);
        active_read_buff_write(0x33);
        active_read_buff_write(0x7e);
        break;
    default:
            letter = is_lower(ascii);
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
        shift = keyflags & PRESSED_SHIFT;
        if (letter && capslock)
            shift = !shift;
        if (shift)
            map = sc_secondary_map;
        active_read_buff_write(map[sc]);
        break;
    }
    /*spinlock_unlock(&keylock);*/
 
}
 
static char key_read(chardev_t *d)
{
    char ch;   
 
    while(!(ch = active_read_buff_read())) {
        __u8 x;
        while (!((x=i8042_status_read() & i8042_BUFFER_FULL_MASK)))
            ;
        x = i8042_data_read();
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                active_read_key_pressed(x);
        }
    }
    return ch;
}
 
/** Poll for key press and release events.
 *
 * This function can be used to implement keyboard polling.
 */
void i8042_poll(void)
{
    __u8 x;
 
    while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
        x = i8042_data_read();
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                key_pressed(x);
        }
    }
}
 

Rev 1963	Rev 1968
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <genarch/i8042/i8042.h>	29	#include <genarch/i8042/i8042.h>
30	#include <arch/drivers/i8042.h>	30	#include <arch/drivers/i8042.h>
31	#include <arch/interrupt.h>	31	#include <arch/interrupt.h>
32	#include <cpu.h>	32	#include <cpu.h>
33	#include <arch/asm.h>	33	#include <arch/asm.h>
34	#include <arch.h>	34	#include <arch.h>
35	#include <synch/spinlock.h>	35	#include <synch/spinlock.h>
36	#include <typedefs.h>	36	#include <typedefs.h>
37	#include <console/chardev.h>	37	#include <console/chardev.h>
38	#include <console/console.h>	38	#include <console/console.h>
39	#include <macros.h>	39	#include <macros.h>
40	#include <interrupt.h>	40	#include <interrupt.h>
41		41
42	/**	42	/**
43	* i8042 processor driver.	43	* i8042 processor driver.
44	* It takes care of low-level keyboard functions.	44	* It takes care of low-level keyboard functions.
45	*/	45	*/
46		46
47	/** Keyboard commands. */	47	/** Keyboard commands. */
48	#define KBD_ENABLE 0xf4	48	#define KBD_ENABLE 0xf4
49	#define KBD_DISABLE 0xf5	49	#define KBD_DISABLE 0xf5
50	#define KBD_ACK 0xfa	50	#define KBD_ACK 0xfa
51		51
52	/*	52	/*
53	* 60 Write 8042 Command Byte: next data byte written to port 60h is	53	* 60 Write 8042 Command Byte: next data byte written to port 60h is
54	* placed in 8042 command register. Format:	54	* placed in 8042 command register. Format:
55	*	55	*
56	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	56	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
57	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	57	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
58	* \| \| \| \| \| \| `----- should be 0	58	* \| \| \| \| \| \| `----- should be 0
59	* \| \| \| \| \| `------ 1=set status register system, 0=clear	59	* \| \| \| \| \| `------ 1=set status register system, 0=clear
60	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	60	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
61	* \| \| \| `-------- disable keyboard I/O by driving clock line low	61	* \| \| \| `-------- disable keyboard I/O by driving clock line low
62	* \| \| `--------- disable auxiliary device, drives clock line low	62	* \| \| `--------- disable auxiliary device, drives clock line low
63	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	63	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
64	* `----------- reserved, should be 0	64	* `----------- reserved, should be 0
65	*/	65	*/
66		66
67	#define i8042_SET_COMMAND 0x60	67	#define i8042_SET_COMMAND 0x60
68	#define i8042_COMMAND 0x49	68	#define i8042_COMMAND 0x49
69		69
70	#define i8042_BUFFER_FULL_MASK 0x01	70	#define i8042_BUFFER_FULL_MASK 0x01
71	#define i8042_WAIT_MASK 0x02	71	#define i8042_WAIT_MASK 0x02
72		72
73	#define SPECIAL '?'	73	#define SPECIAL '?'
74	#define KEY_RELEASE 0x80	74	#define KEY_RELEASE 0x80
75		75
76	/**	76	/**
77	* These codes read from i8042 data register are silently ignored.	77	* These codes read from i8042 data register are silently ignored.
78	*/	78	*/
79	#define IGNORE_CODE 0x7f	79	#define IGNORE_CODE 0x7f
80		80
81	static void key_released(__u8 sc);	81	static void key_released(__u8 sc);
82	static void key_pressed(__u8 sc);	82	static void key_pressed(__u8 sc);
83	static char key_read(chardev_t *d);	83	static char key_read(chardev_t *d);
84		84
85	#define PRESSED_SHIFT (1<<0)	85	#define PRESSED_SHIFT (1<<0)
86	#define PRESSED_CAPSLOCK (1<<1)	86	#define PRESSED_CAPSLOCK (1<<1)
87	#define LOCKED_CAPSLOCK (1<<0)	87	#define LOCKED_CAPSLOCK (1<<0)
88		88
89	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */	89	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */
90		90
91	static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];	91	static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];
92		92
93	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /	93	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /
94	static volatile int keyflags; /*< Tracking of multiple keypresses. /	94	static volatile int keyflags; /*< Tracking of multiple keypresses. /
95	static volatile int lockflags; /*< Tracking of multiple keys lockings. /	95	static volatile int lockflags; /*< Tracking of multiple keys lockings. /
96		96
97	static void i8042_suspend(chardev_t *);	97	static void i8042_suspend(chardev_t *);
98	static void i8042_resume(chardev_t *);	98	static void i8042_resume(chardev_t *);
99		99
100	static chardev_t kbrd;	100	static chardev_t kbrd;
101	static chardev_operations_t ops = {	101	static chardev_operations_t ops = {
102	.suspend = i8042_suspend,	102	.suspend = i8042_suspend,
103	.resume = i8042_resume,	103	.resume = i8042_resume,
104	.read = key_read	104	.read = key_read
105	};	105	};
106		106
107	/** Primary meaning of scancodes. */	107	/** Primary meaning of scancodes. */
108	static char sc_primary_map[] = {	108	static char sc_primary_map[] = {
109	SPECIAL, /* 0x00 */	109	SPECIAL, /* 0x00 */
110	SPECIAL, /* 0x01 - Esc */	110	SPECIAL, /* 0x01 - Esc */
111	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',	111	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
112	'\b', /* 0x0e - Backspace */	112	'\b', /* 0x0e - Backspace */
113	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',	113	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
114	SPECIAL, /* 0x1d - LCtrl */	114	SPECIAL, /* 0x1d - LCtrl */
115	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',	115	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
116	'`',	116	'`',
117	SPECIAL, /* 0x2a - LShift */	117	SPECIAL, /* 0x2a - LShift */
118	'\\',	118	'\\',
119	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',	119	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
120	SPECIAL, /* 0x36 - RShift */	120	SPECIAL, /* 0x36 - RShift */
121	'*',	121	'*',
122	SPECIAL, /* 0x38 - LAlt */	122	SPECIAL, /* 0x38 - LAlt */
123	' ',	123	' ',
124	SPECIAL, /* 0x3a - CapsLock */	124	SPECIAL, /* 0x3a - CapsLock */
125	SPECIAL, /* 0x3b - F1 */	125	SPECIAL, /* 0x3b - F1 */
126	SPECIAL, /* 0x3c - F2 */	126	SPECIAL, /* 0x3c - F2 */
127	SPECIAL, /* 0x3d - F3 */	127	SPECIAL, /* 0x3d - F3 */
128	SPECIAL, /* 0x3e - F4 */	128	SPECIAL, /* 0x3e - F4 */
129	SPECIAL, /* 0x3f - F5 */	129	SPECIAL, /* 0x3f - F5 */
130	SPECIAL, /* 0x40 - F6 */	130	SPECIAL, /* 0x40 - F6 */
131	SPECIAL, /* 0x41 - F7 */	131	SPECIAL, /* 0x41 - F7 */
132	SPECIAL, /* 0x42 - F8 */	132	SPECIAL, /* 0x42 - F8 */
133	SPECIAL, /* 0x43 - F9 */	133	SPECIAL, /* 0x43 - F9 */
134	SPECIAL, /* 0x44 - F10 */	134	SPECIAL, /* 0x44 - F10 */
135	SPECIAL, /* 0x45 - NumLock */	135	SPECIAL, /* 0x45 - NumLock */
136	SPECIAL, /* 0x46 - ScrollLock */	136	SPECIAL, /* 0x46 - ScrollLock */
137	'7', '8', '9', '-',	137	'7', '8', '9', '-',
138	'4', '5', '6', '+',	138	'4', '5', '6', '+',
139	'1', '2', '3',	139	'1', '2', '3',
140	'0', '.',	140	'0', '.',
141	SPECIAL, /* 0x54 - Alt-SysRq */	141	SPECIAL, /* 0x54 - Alt-SysRq */
142	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	142	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
143	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	143	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
144	SPECIAL, /* 0x57 - F11 */	144	SPECIAL, /* 0x57 - F11 */
145	SPECIAL, /* 0x58 - F12 */	145	SPECIAL, /* 0x58 - F12 */
146	SPECIAL, /* 0x59 */	146	SPECIAL, /* 0x59 */
147	SPECIAL, /* 0x5a */	147	SPECIAL, /* 0x5a */
148	SPECIAL, /* 0x5b */	148	SPECIAL, /* 0x5b */
149	SPECIAL, /* 0x5c */	149	SPECIAL, /* 0x5c */
150	SPECIAL, /* 0x5d */	150	SPECIAL, /* 0x5d */
151	SPECIAL, /* 0x5e */	151	SPECIAL, /* 0x5e */
152	SPECIAL, /* 0x5f */	152	SPECIAL, /* 0x5f */
153	SPECIAL, /* 0x60 */	153	SPECIAL, /* 0x60 */
154	SPECIAL, /* 0x61 */	154	SPECIAL, /* 0x61 */
155	SPECIAL, /* 0x62 */	155	SPECIAL, /* 0x62 */
156	SPECIAL, /* 0x63 */	156	SPECIAL, /* 0x63 */
157	SPECIAL, /* 0x64 */	157	SPECIAL, /* 0x64 */
158	SPECIAL, /* 0x65 */	158	SPECIAL, /* 0x65 */
159	SPECIAL, /* 0x66 */	159	SPECIAL, /* 0x66 */
160	SPECIAL, /* 0x67 */	160	SPECIAL, /* 0x67 */
161	SPECIAL, /* 0x68 */	161	SPECIAL, /* 0x68 */
162	SPECIAL, /* 0x69 */	162	SPECIAL, /* 0x69 */
163	SPECIAL, /* 0x6a */	163	SPECIAL, /* 0x6a */
164	SPECIAL, /* 0x6b */	164	SPECIAL, /* 0x6b */
165	SPECIAL, /* 0x6c */	165	SPECIAL, /* 0x6c */
166	SPECIAL, /* 0x6d */	166	SPECIAL, /* 0x6d */
167	SPECIAL, /* 0x6e */	167	SPECIAL, /* 0x6e */
168	SPECIAL, /* 0x6f */	168	SPECIAL, /* 0x6f */
169	SPECIAL, /* 0x70 */	169	SPECIAL, /* 0x70 */
170	SPECIAL, /* 0x71 */	170	SPECIAL, /* 0x71 */
171	SPECIAL, /* 0x72 */	171	SPECIAL, /* 0x72 */
172	SPECIAL, /* 0x73 */	172	SPECIAL, /* 0x73 */
173	SPECIAL, /* 0x74 */	173	SPECIAL, /* 0x74 */
174	SPECIAL, /* 0x75 */	174	SPECIAL, /* 0x75 */
175	SPECIAL, /* 0x76 */	175	SPECIAL, /* 0x76 */
176	SPECIAL, /* 0x77 */	176	SPECIAL, /* 0x77 */
177	SPECIAL, /* 0x78 */	177	SPECIAL, /* 0x78 */
178	SPECIAL, /* 0x79 */	178	SPECIAL, /* 0x79 */
179	SPECIAL, /* 0x7a */	179	SPECIAL, /* 0x7a */
180	SPECIAL, /* 0x7b */	180	SPECIAL, /* 0x7b */
181	SPECIAL, /* 0x7c */	181	SPECIAL, /* 0x7c */
182	SPECIAL, /* 0x7d */	182	SPECIAL, /* 0x7d */
183	SPECIAL, /* 0x7e */	183	SPECIAL, /* 0x7e */
184	SPECIAL, /* 0x7f */	184	SPECIAL, /* 0x7f */
185	};	185	};
186		186
187	/** Secondary meaning of scancodes. */	187	/** Secondary meaning of scancodes. */
188	static char sc_secondary_map[] = {	188	static char sc_secondary_map[] = {
189	SPECIAL, /* 0x00 */	189	SPECIAL, /* 0x00 */
190	SPECIAL, /* 0x01 - Esc */	190	SPECIAL, /* 0x01 - Esc */
191	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',	191	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
192	SPECIAL, /* 0x0e - Backspace */	192	SPECIAL, /* 0x0e - Backspace */
193	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',	193	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
194	SPECIAL, /* 0x1d - LCtrl */	194	SPECIAL, /* 0x1d - LCtrl */
195	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',	195	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
196	'~',	196	'~',
197	SPECIAL, /* 0x2a - LShift */	197	SPECIAL, /* 0x2a - LShift */
198	'\|',	198	'\|',
199	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',	199	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
200	SPECIAL, /* 0x36 - RShift */	200	SPECIAL, /* 0x36 - RShift */
201	'*',	201	'*',
202	SPECIAL, /* 0x38 - LAlt */	202	SPECIAL, /* 0x38 - LAlt */
203	' ',	203	' ',
204	SPECIAL, /* 0x3a - CapsLock */	204	SPECIAL, /* 0x3a - CapsLock */
205	SPECIAL, /* 0x3b - F1 */	205	SPECIAL, /* 0x3b - F1 */
206	SPECIAL, /* 0x3c - F2 */	206	SPECIAL, /* 0x3c - F2 */
207	SPECIAL, /* 0x3d - F3 */	207	SPECIAL, /* 0x3d - F3 */
208	SPECIAL, /* 0x3e - F4 */	208	SPECIAL, /* 0x3e - F4 */
209	SPECIAL, /* 0x3f - F5 */	209	SPECIAL, /* 0x3f - F5 */
210	SPECIAL, /* 0x40 - F6 */	210	SPECIAL, /* 0x40 - F6 */
211	SPECIAL, /* 0x41 - F7 */	211	SPECIAL, /* 0x41 - F7 */
212	SPECIAL, /* 0x42 - F8 */	212	SPECIAL, /* 0x42 - F8 */
213	SPECIAL, /* 0x43 - F9 */	213	SPECIAL, /* 0x43 - F9 */
214	SPECIAL, /* 0x44 - F10 */	214	SPECIAL, /* 0x44 - F10 */
215	SPECIAL, /* 0x45 - NumLock */	215	SPECIAL, /* 0x45 - NumLock */
216	SPECIAL, /* 0x46 - ScrollLock */	216	SPECIAL, /* 0x46 - ScrollLock */
217	'7', '8', '9', '-',	217	'7', '8', '9', '-',
218	'4', '5', '6', '+',	218	'4', '5', '6', '+',
219	'1', '2', '3',	219	'1', '2', '3',
220	'0', '.',	220	'0', '.',
221	SPECIAL, /* 0x54 - Alt-SysRq */	221	SPECIAL, /* 0x54 - Alt-SysRq */
222	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	222	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
223	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	223	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
224	SPECIAL, /* 0x57 - F11 */	224	SPECIAL, /* 0x57 - F11 */
225	SPECIAL, /* 0x58 - F12 */	225	SPECIAL, /* 0x58 - F12 */
226	SPECIAL, /* 0x59 */	226	SPECIAL, /* 0x59 */
227	SPECIAL, /* 0x5a */	227	SPECIAL, /* 0x5a */
228	SPECIAL, /* 0x5b */	228	SPECIAL, /* 0x5b */
229	SPECIAL, /* 0x5c */	229	SPECIAL, /* 0x5c */
230	SPECIAL, /* 0x5d */	230	SPECIAL, /* 0x5d */
231	SPECIAL, /* 0x5e */	231	SPECIAL, /* 0x5e */
232	SPECIAL, /* 0x5f */	232	SPECIAL, /* 0x5f */
233	SPECIAL, /* 0x60 */	233	SPECIAL, /* 0x60 */
234	SPECIAL, /* 0x61 */	234	SPECIAL, /* 0x61 */
235	SPECIAL, /* 0x62 */	235	SPECIAL, /* 0x62 */
236	SPECIAL, /* 0x63 */	236	SPECIAL, /* 0x63 */
237	SPECIAL, /* 0x64 */	237	SPECIAL, /* 0x64 */
238	SPECIAL, /* 0x65 */	238	SPECIAL, /* 0x65 */
239	SPECIAL, /* 0x66 */	239	SPECIAL, /* 0x66 */
240	SPECIAL, /* 0x67 */	240	SPECIAL, /* 0x67 */
241	SPECIAL, /* 0x68 */	241	SPECIAL, /* 0x68 */
242	SPECIAL, /* 0x69 */	242	SPECIAL, /* 0x69 */
243	SPECIAL, /* 0x6a */	243	SPECIAL, /* 0x6a */
244	SPECIAL, /* 0x6b */	244	SPECIAL, /* 0x6b */
245	SPECIAL, /* 0x6c */	245	SPECIAL, /* 0x6c */
246	SPECIAL, /* 0x6d */	246	SPECIAL, /* 0x6d */
247	SPECIAL, /* 0x6e */	247	SPECIAL, /* 0x6e */
248	SPECIAL, /* 0x6f */	248	SPECIAL, /* 0x6f */
249	SPECIAL, /* 0x70 */	249	SPECIAL, /* 0x70 */
250	SPECIAL, /* 0x71 */	250	SPECIAL, /* 0x71 */
251	SPECIAL, /* 0x72 */	251	SPECIAL, /* 0x72 */
252	SPECIAL, /* 0x73 */	252	SPECIAL, /* 0x73 */
253	SPECIAL, /* 0x74 */	253	SPECIAL, /* 0x74 */
254	SPECIAL, /* 0x75 */	254	SPECIAL, /* 0x75 */
255	SPECIAL, /* 0x76 */	255	SPECIAL, /* 0x76 */
256	SPECIAL, /* 0x77 */	256	SPECIAL, /* 0x77 */
257	SPECIAL, /* 0x78 */	257	SPECIAL, /* 0x78 */
258	SPECIAL, /* 0x79 */	258	SPECIAL, /* 0x79 */
259	SPECIAL, /* 0x7a */	259	SPECIAL, /* 0x7a */
260	SPECIAL, /* 0x7b */	260	SPECIAL, /* 0x7b */
261	SPECIAL, /* 0x7c */	261	SPECIAL, /* 0x7c */
262	SPECIAL, /* 0x7d */	262	SPECIAL, /* 0x7d */
263	SPECIAL, /* 0x7e */	263	SPECIAL, /* 0x7e */
264	SPECIAL, /* 0x7f */	264	SPECIAL, /* 0x7f */
265	};	265	};
266		266
267	static void i8042_interrupt(int n, istate_t *istate);	267	static void i8042_interrupt(int n, istate_t *istate);
268	static void i8042_wait(void);	268	static void i8042_wait(void);
269		269
270	/** Initialize i8042. */	270	/** Initialize i8042. */
271	void i8042_init(void)	271	void i8042_init(void)
272	{	272	{
273	int i;	273	int i;
274		274
275	exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);	275	exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
276	i8042_wait();	276	i8042_wait();
277	i8042_command_write(i8042_SET_COMMAND);	277	i8042_command_write(i8042_SET_COMMAND);
278	i8042_wait();	278	i8042_wait();
279	i8042_data_write(i8042_COMMAND);	279	i8042_data_write(i8042_COMMAND);
280	i8042_wait();	280	i8042_wait();
281		281
282	trap_virtual_enable_irqs(1<<IRQ_KBD);	282	trap_virtual_enable_irqs(1<<IRQ_KBD);
283	chardev_initialize("i8042_kbd", &kbrd, &ops);	283	chardev_initialize("i8042_kbd", &kbrd, &ops);
284	stdin = &kbrd;	284	stdin = &kbrd;
285		285
286	/*	286	/*
287	* Clear input buffer.	287	* Clear input buffer.
288	* Number of iterations is limited to prevent infinite looping.	288	* Number of iterations is limited to prevent infinite looping.
289	*/	289	*/
290	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {	290	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
291	i8042_data_read();	291	i8042_data_read();
292	}	292	}
293	}	293	}
294		294
295	/** Process i8042 interrupt.	295	/** Process i8042 interrupt.
296	*	296	*
297	* @param n Interrupt vector.	297	* @param n Interrupt vector.
298	* @param stack Interrupted stack.	298	* @param stack Interrupted stack.
299	*/	299	*/
300	void i8042_interrupt(int n, istate_t *istate)	300	void i8042_interrupt(int n, istate_t *istate)
301	{	301	{
302	__u8 x;	302	__u8 x;
303		303
304	trap_virtual_eoi();	304	trap_virtual_eoi();
305	x = i8042_data_read();	305	x = i8042_data_read();
306	if (x & KEY_RELEASE)	306	if (x & KEY_RELEASE)
307	key_released(x ^ KEY_RELEASE);	307	key_released(x ^ KEY_RELEASE);
308	else	308	else
309	key_pressed(x);	309	key_pressed(x);
310	}	310	}
311		311
312	/** Wait until the controller reads its data. */	312	/** Wait until the controller reads its data. */
313	void i8042_wait(void) {	313	void i8042_wait(void) {
314	while (i8042_status_read() & i8042_WAIT_MASK) {	314	while (i8042_status_read() & i8042_WAIT_MASK) {
315	/* wait */	315	/* wait */
316	}	316	}
317	}	317	}
318		318
319	/** Process release of key.	319	/** Process release of key.
320	*	320	*
321	* @param sc Scancode of the key being released.	321	* @param sc Scancode of the key being released.
322	*/	322	*/
323	void key_released(__u8 sc)	323	void key_released(__u8 sc)
324	{	324	{
325	spinlock_lock(&keylock);	325	spinlock_lock(&keylock);
326	switch (sc) {	326	switch (sc) {
327	case SC_LSHIFT:	327	case SC_LSHIFT:
328	case SC_RSHIFT:	328	case SC_RSHIFT:
329	keyflags &= ~PRESSED_SHIFT;	329	keyflags &= ~PRESSED_SHIFT;
330	break;	330	break;
331	case SC_CAPSLOCK:	331	case SC_CAPSLOCK:
332	keyflags &= ~PRESSED_CAPSLOCK;	332	keyflags &= ~PRESSED_CAPSLOCK;
333	if (lockflags & LOCKED_CAPSLOCK)	333	if (lockflags & LOCKED_CAPSLOCK)
334	lockflags &= ~LOCKED_CAPSLOCK;	334	lockflags &= ~LOCKED_CAPSLOCK;
335	else	335	else
336	lockflags \|= LOCKED_CAPSLOCK;	336	lockflags \|= LOCKED_CAPSLOCK;
337	break;	337	break;
338	default:	338	default:
339	break;	339	break;
340	}	340	}
341	spinlock_unlock(&keylock);	341	spinlock_unlock(&keylock);
342	}	342	}
343		343
344	/** Process keypress.	344	/** Process keypress.
345	*	345	*
346	* @param sc Scancode of the key being pressed.	346	* @param sc Scancode of the key being pressed.
347	*/	347	*/
348	void key_pressed(__u8 sc)	348	void key_pressed(__u8 sc)
349	{	349	{
350	char *map = sc_primary_map;	350	char *map = sc_primary_map;
351	char ascii = sc_primary_map[sc];	351	char ascii = sc_primary_map[sc];
352	bool shift, capslock;	352	bool shift, capslock;
353	bool letter = false;	353	bool letter = false;
354		354
355	spinlock_lock(&keylock);	355	spinlock_lock(&keylock);
356	switch (sc) {	356	switch (sc) {
357	case SC_LSHIFT:	357	case SC_LSHIFT:
358	case SC_RSHIFT:	358	case SC_RSHIFT:
359	keyflags \|= PRESSED_SHIFT;	359	keyflags \|= PRESSED_SHIFT;
360	break;	360	break;
361	case SC_CAPSLOCK:	361	case SC_CAPSLOCK:
362	keyflags \|= PRESSED_CAPSLOCK;	362	keyflags \|= PRESSED_CAPSLOCK;
363	break;	363	break;
364	case SC_SPEC_ESCAPE:	364	case SC_SPEC_ESCAPE:
365	break;	365	break;
366	case SC_LEFTARR:	366	case SC_LEFTARR:
367	chardev_push_character(&kbrd, 0x1b);	367	chardev_push_character(&kbrd, 0x1b);
368	chardev_push_character(&kbrd, 0x5b);	368	chardev_push_character(&kbrd, 0x5b);
369	chardev_push_character(&kbrd, 0x44);	369	chardev_push_character(&kbrd, 0x44);
370	break;	370	break;
371	case SC_RIGHTARR:	371	case SC_RIGHTARR:
372	chardev_push_character(&kbrd, 0x1b);	372	chardev_push_character(&kbrd, 0x1b);
373	chardev_push_character(&kbrd, 0x5b);	373	chardev_push_character(&kbrd, 0x5b);
374	chardev_push_character(&kbrd, 0x43);	374	chardev_push_character(&kbrd, 0x43);
375	break;	375	break;
376	case SC_UPARR:	376	case SC_UPARR:
377	chardev_push_character(&kbrd, 0x1b);	377	chardev_push_character(&kbrd, 0x1b);
378	chardev_push_character(&kbrd, 0x5b);	378	chardev_push_character(&kbrd, 0x5b);
379	chardev_push_character(&kbrd, 0x41);	379	chardev_push_character(&kbrd, 0x41);
380	break;	380	break;
381	case SC_DOWNARR:	381	case SC_DOWNARR:
382	chardev_push_character(&kbrd, 0x1b);	382	chardev_push_character(&kbrd, 0x1b);
383	chardev_push_character(&kbrd, 0x5b);	383	chardev_push_character(&kbrd, 0x5b);
384	chardev_push_character(&kbrd, 0x42);	384	chardev_push_character(&kbrd, 0x42);
385	break;	385	break;
386	case SC_HOME:	386	case SC_HOME:
387	chardev_push_character(&kbrd, 0x1b);	387	chardev_push_character(&kbrd, 0x1b);
388	chardev_push_character(&kbrd, 0x4f);	388	chardev_push_character(&kbrd, 0x4f);
389	chardev_push_character(&kbrd, 0x48);	389	chardev_push_character(&kbrd, 0x48);
390	break;	390	break;
391	case SC_END:	391	case SC_END:
392	chardev_push_character(&kbrd, 0x1b);	392	chardev_push_character(&kbrd, 0x1b);
393	chardev_push_character(&kbrd, 0x4f);	393	chardev_push_character(&kbrd, 0x4f);
394	chardev_push_character(&kbrd, 0x46);	394	chardev_push_character(&kbrd, 0x46);
395	break;	395	break;
396	case SC_DELETE:	396	case SC_DELETE:
397	chardev_push_character(&kbrd, 0x1b);	397	chardev_push_character(&kbrd, 0x1b);
398	chardev_push_character(&kbrd, 0x5b);	398	chardev_push_character(&kbrd, 0x5b);
399	chardev_push_character(&kbrd, 0x33);	399	chardev_push_character(&kbrd, 0x33);
400	chardev_push_character(&kbrd, 0x7e);	400	chardev_push_character(&kbrd, 0x7e);
401	break;	401	break;
402	default:	402	default:
403	letter = is_lower(ascii);	403	letter = is_lower(ascii);
404	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);	404	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);
405	shift = keyflags & PRESSED_SHIFT;	405	shift = keyflags & PRESSED_SHIFT;
406	if (letter && capslock)	406	if (letter && capslock)
407	shift = !shift;	407	shift = !shift;
408	if (shift)	408	if (shift)
409	map = sc_secondary_map;	409	map = sc_secondary_map;
410	chardev_push_character(&kbrd, map[sc]);	410	chardev_push_character(&kbrd, map[sc]);
411	break;	411	break;
412	}	412	}
413	spinlock_unlock(&keylock);	413	spinlock_unlock(&keylock);
414	}	414	}
415		415
416	/* Called from getc(). */	416	/* Called from getc(). */
417	void i8042_resume(chardev_t *d)	417	void i8042_resume(chardev_t *d)
418	{	418	{
419	}	419	}
420		420
421	/* Called from getc(). */	421	/* Called from getc(). */
422	void i8042_suspend(chardev_t *d)	422	void i8042_suspend(chardev_t *d)
423	{	423	{
424	}	424	}
425		425
426	static __u8 active_read_buff_read(void)	426	static __u8 active_read_buff_read(void)
427	{	427	{
428	static int i=0;	428	static int i=0;
429	i &= (ACTIVE_READ_BUFF_SIZE-1);	429	i &= (ACTIVE_READ_BUFF_SIZE-1);
430	if(!active_read_buff[i]) {	430	if(!active_read_buff[i]) {
431	return 0;	431	return 0;
432	}	432	}
433	return active_read_buff[i++];	433	return active_read_buff[i++];
434	}	434	}
435		435
436	static void active_read_buff_write(__u8 ch)	436	static void active_read_buff_write(__u8 ch)
437	{	437	{
438	static int i=0;	438	static int i=0;
439	active_read_buff[i] = ch;	439	active_read_buff[i] = ch;
440	i++;	440	i++;
441	i &= (ACTIVE_READ_BUFF_SIZE-1);	441	i &= (ACTIVE_READ_BUFF_SIZE-1);
442	active_read_buff[i]=0;	442	active_read_buff[i]=0;
443	}	443	}
444		444
445		445
446	static void active_read_key_pressed(__u8 sc)	446	static void active_read_key_pressed(__u8 sc)
447	{	447	{
448	char *map = sc_primary_map;	448	char *map = sc_primary_map;
449	char ascii = sc_primary_map[sc];	449	char ascii = sc_primary_map[sc];
450	bool shift, capslock;	450	bool shift, capslock;
451	bool letter = false;	451	bool letter = false;
452		452
453	/spinlock_lock(&keylock);/	453	/spinlock_lock(&keylock);/
454	switch (sc) {	454	switch (sc) {
455	case SC_LSHIFT:	455	case SC_LSHIFT:
456	case SC_RSHIFT:	456	case SC_RSHIFT:
457	keyflags \|= PRESSED_SHIFT;	457	keyflags \|= PRESSED_SHIFT;
458	break;	458	break;
459	case SC_CAPSLOCK:	459	case SC_CAPSLOCK:
460	keyflags \|= PRESSED_CAPSLOCK;	460	keyflags \|= PRESSED_CAPSLOCK;
461	break;	461	break;
462	case SC_SPEC_ESCAPE:	462	case SC_SPEC_ESCAPE:
463	break;	463	break;
464	case SC_LEFTARR:	464	case SC_LEFTARR:
465	active_read_buff_write(0x1b);	465	active_read_buff_write(0x1b);
466	active_read_buff_write(0x5b);	466	active_read_buff_write(0x5b);
467	active_read_buff_write(0x44);	467	active_read_buff_write(0x44);
468	break;	468	break;
469	case SC_RIGHTARR:	469	case SC_RIGHTARR:
470	active_read_buff_write(0x1b);	470	active_read_buff_write(0x1b);
471	active_read_buff_write(0x5b);	471	active_read_buff_write(0x5b);
472	active_read_buff_write(0x43);	472	active_read_buff_write(0x43);
473	break;	473	break;
474	case SC_UPARR:	474	case SC_UPARR:
475	active_read_buff_write(0x1b);	475	active_read_buff_write(0x1b);
476	active_read_buff_write(0x5b);	476	active_read_buff_write(0x5b);
477	active_read_buff_write(0x41);	477	active_read_buff_write(0x41);
478	break;	478	break;
479	case SC_DOWNARR:	479	case SC_DOWNARR:
480	active_read_buff_write(0x1b);	480	active_read_buff_write(0x1b);
481	active_read_buff_write(0x5b);	481	active_read_buff_write(0x5b);
482	active_read_buff_write(0x42);	482	active_read_buff_write(0x42);
483	break;	483	break;
484	case SC_HOME:	484	case SC_HOME:
485	active_read_buff_write(0x1b);	485	active_read_buff_write(0x1b);
486	active_read_buff_write(0x4f);	486	active_read_buff_write(0x4f);
487	active_read_buff_write(0x48);	487	active_read_buff_write(0x48);
488	break;	488	break;
489	case SC_END:	489	case SC_END:
490	active_read_buff_write(0x1b);	490	active_read_buff_write(0x1b);
491	active_read_buff_write(0x4f);	491	active_read_buff_write(0x4f);
492	active_read_buff_write(0x46);	492	active_read_buff_write(0x46);
493	break;	493	break;
494	case SC_DELETE:	494	case SC_DELETE:
495	active_read_buff_write(0x1b);	495	active_read_buff_write(0x1b);
496	active_read_buff_write(0x5b);	496	active_read_buff_write(0x5b);
497	active_read_buff_write(0x33);	497	active_read_buff_write(0x33);
498	active_read_buff_write(0x7e);	498	active_read_buff_write(0x7e);
499	break;	499	break;
500	default:	500	default:

Subversion Repositories HelenOS

(root)/tags/0.1.1/kernel/genarch/src/i8042/i8042.c – Rev 1963 → 1968