WebSVN – HelenOS-historic – Diff – /kernel/trunk/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.
 */
 
/** @addtogroup genarch
 * @{
 */
/**
 * @file
 * @brief   i8042 processor driver.
 *
 * It takes care of low-level keyboard functions.
 */
 
#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>
 
/* 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);
 
static iroutine oldvector;
/** Initialize keyboard and service interrupts using kernel routine */
void i8042_grab(void)
{
    oldvector = 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();
}
/** Resume the former interrupt vector */
void i8042_release(void)
{
    if (oldvector)
        exc_register(VECTOR_KBD, "user_interrupt", oldvector);
}
 
/** Initialize i8042. */
void i8042_init(void)
{
    int i;
 
    i8042_grab();
        /* Prevent user from accidentaly releasing calling i8042_resume
     * and disabling keyboard
     */
    oldvector = NULL;
 
    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 istate Interrupted state.
 */
void i8042_interrupt(int n, istate_t *istate)
{
    __u8 x;
 
    while ((i8042_status_read() & i8042_BUFFER_FULL_MASK)) {
        x = i8042_data_read();
        if (x & KEY_RELEASE)
            key_released(x ^ KEY_RELEASE);
        else
            key_pressed(x);
    }
    trap_virtual_eoi();
}
 
/** 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 (!(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 1754	Rev 1757
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	/** @addtogroup genarch	29	/** @addtogroup genarch
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file i8042.c	33	* @file
34	* @brief i8042 processor driver.	34	* @brief i8042 processor driver.
35	*	35	*
36	* It takes care of low-level keyboard functions.	36	* It takes care of low-level keyboard functions.
37	*/	37	*/
38		38
39	#include <genarch/i8042/i8042.h>	39	#include <genarch/i8042/i8042.h>
40	#include <arch/drivers/i8042.h>	40	#include <arch/drivers/i8042.h>
41	#include <arch/interrupt.h>	41	#include <arch/interrupt.h>
42	#include <cpu.h>	42	#include <cpu.h>
43	#include <arch/asm.h>	43	#include <arch/asm.h>
44	#include <arch.h>	44	#include <arch.h>
45	#include <synch/spinlock.h>	45	#include <synch/spinlock.h>
46	#include <typedefs.h>	46	#include <typedefs.h>
47	#include <console/chardev.h>	47	#include <console/chardev.h>
48	#include <console/console.h>	48	#include <console/console.h>
49	#include <macros.h>	49	#include <macros.h>
50	#include <interrupt.h>	50	#include <interrupt.h>
51		51
52	/* Keyboard commands. */	52	/* Keyboard commands. */
53	#define KBD_ENABLE 0xf4	53	#define KBD_ENABLE 0xf4
54	#define KBD_DISABLE 0xf5	54	#define KBD_DISABLE 0xf5
55	#define KBD_ACK 0xfa	55	#define KBD_ACK 0xfa
56		56
57	/*	57	/*
58	* 60 Write 8042 Command Byte: next data byte written to port 60h is	58	* 60 Write 8042 Command Byte: next data byte written to port 60h is
59	* placed in 8042 command register. Format:	59	* placed in 8042 command register. Format:
60	*	60	*
61	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	61	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
62	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	62	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
63	* \| \| \| \| \| \| `----- should be 0	63	* \| \| \| \| \| \| `----- should be 0
64	* \| \| \| \| \| `------ 1=set status register system, 0=clear	64	* \| \| \| \| \| `------ 1=set status register system, 0=clear
65	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	65	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
66	* \| \| \| `-------- disable keyboard I/O by driving clock line low	66	* \| \| \| `-------- disable keyboard I/O by driving clock line low
67	* \| \| `--------- disable auxiliary device, drives clock line low	67	* \| \| `--------- disable auxiliary device, drives clock line low
68	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	68	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
69	* `----------- reserved, should be 0	69	* `----------- reserved, should be 0
70	*/	70	*/
71		71
72	#define i8042_SET_COMMAND 0x60	72	#define i8042_SET_COMMAND 0x60
73	#define i8042_COMMAND 0x49	73	#define i8042_COMMAND 0x49
74		74
75	#define i8042_BUFFER_FULL_MASK 0x01	75	#define i8042_BUFFER_FULL_MASK 0x01
76	#define i8042_WAIT_MASK 0x02	76	#define i8042_WAIT_MASK 0x02
77		77
78	#define SPECIAL '?'	78	#define SPECIAL '?'
79	#define KEY_RELEASE 0x80	79	#define KEY_RELEASE 0x80
80		80
81	/**	81	/**
82	* These codes read from i8042 data register are silently ignored.	82	* These codes read from i8042 data register are silently ignored.
83	*/	83	*/
84	#define IGNORE_CODE 0x7f	84	#define IGNORE_CODE 0x7f
85		85
86	static void key_released(__u8 sc);	86	static void key_released(__u8 sc);
87	static void key_pressed(__u8 sc);	87	static void key_pressed(__u8 sc);
88	static char key_read(chardev_t *d);	88	static char key_read(chardev_t *d);
89		89
90	#define PRESSED_SHIFT (1<<0)	90	#define PRESSED_SHIFT (1<<0)
91	#define PRESSED_CAPSLOCK (1<<1)	91	#define PRESSED_CAPSLOCK (1<<1)
92	#define LOCKED_CAPSLOCK (1<<0)	92	#define LOCKED_CAPSLOCK (1<<0)
93		93
94	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */	94	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */
95		95
96	static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];	96	static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];
97		97
98	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /	98	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /
99	static volatile int keyflags; /*< Tracking of multiple keypresses. /	99	static volatile int keyflags; /*< Tracking of multiple keypresses. /
100	static volatile int lockflags; /*< Tracking of multiple keys lockings. /	100	static volatile int lockflags; /*< Tracking of multiple keys lockings. /
101		101
102	static void i8042_suspend(chardev_t *);	102	static void i8042_suspend(chardev_t *);
103	static void i8042_resume(chardev_t *);	103	static void i8042_resume(chardev_t *);
104		104
105	static chardev_t kbrd;	105	static chardev_t kbrd;
106	static chardev_operations_t ops = {	106	static chardev_operations_t ops = {
107	.suspend = i8042_suspend,	107	.suspend = i8042_suspend,
108	.resume = i8042_resume,	108	.resume = i8042_resume,
109	.read = key_read	109	.read = key_read
110	};	110	};
111		111
112	/** Primary meaning of scancodes. */	112	/** Primary meaning of scancodes. */
113	static char sc_primary_map[] = {	113	static char sc_primary_map[] = {
114	SPECIAL, /* 0x00 */	114	SPECIAL, /* 0x00 */
115	SPECIAL, /* 0x01 - Esc */	115	SPECIAL, /* 0x01 - Esc */
116	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',	116	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
117	'\b', /* 0x0e - Backspace */	117	'\b', /* 0x0e - Backspace */
118	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',	118	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
119	SPECIAL, /* 0x1d - LCtrl */	119	SPECIAL, /* 0x1d - LCtrl */
120	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',	120	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
121	'`',	121	'`',
122	SPECIAL, /* 0x2a - LShift */	122	SPECIAL, /* 0x2a - LShift */
123	'\\',	123	'\\',
124	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',	124	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
125	SPECIAL, /* 0x36 - RShift */	125	SPECIAL, /* 0x36 - RShift */
126	'*',	126	'*',
127	SPECIAL, /* 0x38 - LAlt */	127	SPECIAL, /* 0x38 - LAlt */
128	' ',	128	' ',
129	SPECIAL, /* 0x3a - CapsLock */	129	SPECIAL, /* 0x3a - CapsLock */
130	SPECIAL, /* 0x3b - F1 */	130	SPECIAL, /* 0x3b - F1 */
131	SPECIAL, /* 0x3c - F2 */	131	SPECIAL, /* 0x3c - F2 */
132	SPECIAL, /* 0x3d - F3 */	132	SPECIAL, /* 0x3d - F3 */
133	SPECIAL, /* 0x3e - F4 */	133	SPECIAL, /* 0x3e - F4 */
134	SPECIAL, /* 0x3f - F5 */	134	SPECIAL, /* 0x3f - F5 */
135	SPECIAL, /* 0x40 - F6 */	135	SPECIAL, /* 0x40 - F6 */
136	SPECIAL, /* 0x41 - F7 */	136	SPECIAL, /* 0x41 - F7 */
137	SPECIAL, /* 0x42 - F8 */	137	SPECIAL, /* 0x42 - F8 */
138	SPECIAL, /* 0x43 - F9 */	138	SPECIAL, /* 0x43 - F9 */
139	SPECIAL, /* 0x44 - F10 */	139	SPECIAL, /* 0x44 - F10 */
140	SPECIAL, /* 0x45 - NumLock */	140	SPECIAL, /* 0x45 - NumLock */
141	SPECIAL, /* 0x46 - ScrollLock */	141	SPECIAL, /* 0x46 - ScrollLock */
142	'7', '8', '9', '-',	142	'7', '8', '9', '-',
143	'4', '5', '6', '+',	143	'4', '5', '6', '+',
144	'1', '2', '3',	144	'1', '2', '3',
145	'0', '.',	145	'0', '.',
146	SPECIAL, /* 0x54 - Alt-SysRq */	146	SPECIAL, /* 0x54 - Alt-SysRq */
147	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	147	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
148	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	148	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
149	SPECIAL, /* 0x57 - F11 */	149	SPECIAL, /* 0x57 - F11 */
150	SPECIAL, /* 0x58 - F12 */	150	SPECIAL, /* 0x58 - F12 */
151	SPECIAL, /* 0x59 */	151	SPECIAL, /* 0x59 */
152	SPECIAL, /* 0x5a */	152	SPECIAL, /* 0x5a */
153	SPECIAL, /* 0x5b */	153	SPECIAL, /* 0x5b */
154	SPECIAL, /* 0x5c */	154	SPECIAL, /* 0x5c */
155	SPECIAL, /* 0x5d */	155	SPECIAL, /* 0x5d */
156	SPECIAL, /* 0x5e */	156	SPECIAL, /* 0x5e */
157	SPECIAL, /* 0x5f */	157	SPECIAL, /* 0x5f */
158	SPECIAL, /* 0x60 */	158	SPECIAL, /* 0x60 */
159	SPECIAL, /* 0x61 */	159	SPECIAL, /* 0x61 */
160	SPECIAL, /* 0x62 */	160	SPECIAL, /* 0x62 */
161	SPECIAL, /* 0x63 */	161	SPECIAL, /* 0x63 */
162	SPECIAL, /* 0x64 */	162	SPECIAL, /* 0x64 */
163	SPECIAL, /* 0x65 */	163	SPECIAL, /* 0x65 */
164	SPECIAL, /* 0x66 */	164	SPECIAL, /* 0x66 */
165	SPECIAL, /* 0x67 */	165	SPECIAL, /* 0x67 */
166	SPECIAL, /* 0x68 */	166	SPECIAL, /* 0x68 */
167	SPECIAL, /* 0x69 */	167	SPECIAL, /* 0x69 */
168	SPECIAL, /* 0x6a */	168	SPECIAL, /* 0x6a */
169	SPECIAL, /* 0x6b */	169	SPECIAL, /* 0x6b */
170	SPECIAL, /* 0x6c */	170	SPECIAL, /* 0x6c */
171	SPECIAL, /* 0x6d */	171	SPECIAL, /* 0x6d */
172	SPECIAL, /* 0x6e */	172	SPECIAL, /* 0x6e */
173	SPECIAL, /* 0x6f */	173	SPECIAL, /* 0x6f */
174	SPECIAL, /* 0x70 */	174	SPECIAL, /* 0x70 */
175	SPECIAL, /* 0x71 */	175	SPECIAL, /* 0x71 */
176	SPECIAL, /* 0x72 */	176	SPECIAL, /* 0x72 */
177	SPECIAL, /* 0x73 */	177	SPECIAL, /* 0x73 */
178	SPECIAL, /* 0x74 */	178	SPECIAL, /* 0x74 */
179	SPECIAL, /* 0x75 */	179	SPECIAL, /* 0x75 */
180	SPECIAL, /* 0x76 */	180	SPECIAL, /* 0x76 */
181	SPECIAL, /* 0x77 */	181	SPECIAL, /* 0x77 */
182	SPECIAL, /* 0x78 */	182	SPECIAL, /* 0x78 */
183	SPECIAL, /* 0x79 */	183	SPECIAL, /* 0x79 */
184	SPECIAL, /* 0x7a */	184	SPECIAL, /* 0x7a */
185	SPECIAL, /* 0x7b */	185	SPECIAL, /* 0x7b */
186	SPECIAL, /* 0x7c */	186	SPECIAL, /* 0x7c */
187	SPECIAL, /* 0x7d */	187	SPECIAL, /* 0x7d */
188	SPECIAL, /* 0x7e */	188	SPECIAL, /* 0x7e */
189	SPECIAL, /* 0x7f */	189	SPECIAL, /* 0x7f */
190	};	190	};
191		191
192	/** Secondary meaning of scancodes. */	192	/** Secondary meaning of scancodes. */
193	static char sc_secondary_map[] = {	193	static char sc_secondary_map[] = {
194	SPECIAL, /* 0x00 */	194	SPECIAL, /* 0x00 */
195	SPECIAL, /* 0x01 - Esc */	195	SPECIAL, /* 0x01 - Esc */
196	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',	196	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
197	SPECIAL, /* 0x0e - Backspace */	197	SPECIAL, /* 0x0e - Backspace */
198	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',	198	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
199	SPECIAL, /* 0x1d - LCtrl */	199	SPECIAL, /* 0x1d - LCtrl */
200	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',	200	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
201	'~',	201	'~',
202	SPECIAL, /* 0x2a - LShift */	202	SPECIAL, /* 0x2a - LShift */
203	'\|',	203	'\|',
204	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',	204	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
205	SPECIAL, /* 0x36 - RShift */	205	SPECIAL, /* 0x36 - RShift */
206	'*',	206	'*',
207	SPECIAL, /* 0x38 - LAlt */	207	SPECIAL, /* 0x38 - LAlt */
208	' ',	208	' ',
209	SPECIAL, /* 0x3a - CapsLock */	209	SPECIAL, /* 0x3a - CapsLock */
210	SPECIAL, /* 0x3b - F1 */	210	SPECIAL, /* 0x3b - F1 */
211	SPECIAL, /* 0x3c - F2 */	211	SPECIAL, /* 0x3c - F2 */
212	SPECIAL, /* 0x3d - F3 */	212	SPECIAL, /* 0x3d - F3 */
213	SPECIAL, /* 0x3e - F4 */	213	SPECIAL, /* 0x3e - F4 */
214	SPECIAL, /* 0x3f - F5 */	214	SPECIAL, /* 0x3f - F5 */
215	SPECIAL, /* 0x40 - F6 */	215	SPECIAL, /* 0x40 - F6 */
216	SPECIAL, /* 0x41 - F7 */	216	SPECIAL, /* 0x41 - F7 */
217	SPECIAL, /* 0x42 - F8 */	217	SPECIAL, /* 0x42 - F8 */
218	SPECIAL, /* 0x43 - F9 */	218	SPECIAL, /* 0x43 - F9 */
219	SPECIAL, /* 0x44 - F10 */	219	SPECIAL, /* 0x44 - F10 */
220	SPECIAL, /* 0x45 - NumLock */	220	SPECIAL, /* 0x45 - NumLock */
221	SPECIAL, /* 0x46 - ScrollLock */	221	SPECIAL, /* 0x46 - ScrollLock */
222	'7', '8', '9', '-',	222	'7', '8', '9', '-',
223	'4', '5', '6', '+',	223	'4', '5', '6', '+',
224	'1', '2', '3',	224	'1', '2', '3',
225	'0', '.',	225	'0', '.',
226	SPECIAL, /* 0x54 - Alt-SysRq */	226	SPECIAL, /* 0x54 - Alt-SysRq */
227	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	227	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
228	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	228	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
229	SPECIAL, /* 0x57 - F11 */	229	SPECIAL, /* 0x57 - F11 */
230	SPECIAL, /* 0x58 - F12 */	230	SPECIAL, /* 0x58 - F12 */
231	SPECIAL, /* 0x59 */	231	SPECIAL, /* 0x59 */
232	SPECIAL, /* 0x5a */	232	SPECIAL, /* 0x5a */
233	SPECIAL, /* 0x5b */	233	SPECIAL, /* 0x5b */
234	SPECIAL, /* 0x5c */	234	SPECIAL, /* 0x5c */
235	SPECIAL, /* 0x5d */	235	SPECIAL, /* 0x5d */
236	SPECIAL, /* 0x5e */	236	SPECIAL, /* 0x5e */
237	SPECIAL, /* 0x5f */	237	SPECIAL, /* 0x5f */
238	SPECIAL, /* 0x60 */	238	SPECIAL, /* 0x60 */
239	SPECIAL, /* 0x61 */	239	SPECIAL, /* 0x61 */
240	SPECIAL, /* 0x62 */	240	SPECIAL, /* 0x62 */
241	SPECIAL, /* 0x63 */	241	SPECIAL, /* 0x63 */
242	SPECIAL, /* 0x64 */	242	SPECIAL, /* 0x64 */
243	SPECIAL, /* 0x65 */	243	SPECIAL, /* 0x65 */
244	SPECIAL, /* 0x66 */	244	SPECIAL, /* 0x66 */
245	SPECIAL, /* 0x67 */	245	SPECIAL, /* 0x67 */
246	SPECIAL, /* 0x68 */	246	SPECIAL, /* 0x68 */
247	SPECIAL, /* 0x69 */	247	SPECIAL, /* 0x69 */
248	SPECIAL, /* 0x6a */	248	SPECIAL, /* 0x6a */
249	SPECIAL, /* 0x6b */	249	SPECIAL, /* 0x6b */
250	SPECIAL, /* 0x6c */	250	SPECIAL, /* 0x6c */
251	SPECIAL, /* 0x6d */	251	SPECIAL, /* 0x6d */
252	SPECIAL, /* 0x6e */	252	SPECIAL, /* 0x6e */
253	SPECIAL, /* 0x6f */	253	SPECIAL, /* 0x6f */
254	SPECIAL, /* 0x70 */	254	SPECIAL, /* 0x70 */
255	SPECIAL, /* 0x71 */	255	SPECIAL, /* 0x71 */
256	SPECIAL, /* 0x72 */	256	SPECIAL, /* 0x72 */
257	SPECIAL, /* 0x73 */	257	SPECIAL, /* 0x73 */
258	SPECIAL, /* 0x74 */	258	SPECIAL, /* 0x74 */
259	SPECIAL, /* 0x75 */	259	SPECIAL, /* 0x75 */
260	SPECIAL, /* 0x76 */	260	SPECIAL, /* 0x76 */
261	SPECIAL, /* 0x77 */	261	SPECIAL, /* 0x77 */
262	SPECIAL, /* 0x78 */	262	SPECIAL, /* 0x78 */
263	SPECIAL, /* 0x79 */	263	SPECIAL, /* 0x79 */
264	SPECIAL, /* 0x7a */	264	SPECIAL, /* 0x7a */
265	SPECIAL, /* 0x7b */	265	SPECIAL, /* 0x7b */
266	SPECIAL, /* 0x7c */	266	SPECIAL, /* 0x7c */
267	SPECIAL, /* 0x7d */	267	SPECIAL, /* 0x7d */
268	SPECIAL, /* 0x7e */	268	SPECIAL, /* 0x7e */
269	SPECIAL, /* 0x7f */	269	SPECIAL, /* 0x7f */
270	};	270	};
271		271
272	static void i8042_interrupt(int n, istate_t *istate);	272	static void i8042_interrupt(int n, istate_t *istate);
273	static void i8042_wait(void);	273	static void i8042_wait(void);
274		274
275	static iroutine oldvector;	275	static iroutine oldvector;
276	/** Initialize keyboard and service interrupts using kernel routine */	276	/** Initialize keyboard and service interrupts using kernel routine */
277	void i8042_grab(void)	277	void i8042_grab(void)
278	{	278	{
279	oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);	279	oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
280	i8042_wait();	280	i8042_wait();
281	i8042_command_write(i8042_SET_COMMAND);	281	i8042_command_write(i8042_SET_COMMAND);
282	i8042_wait();	282	i8042_wait();
283	i8042_data_write(i8042_COMMAND);	283	i8042_data_write(i8042_COMMAND);
284	i8042_wait();	284	i8042_wait();
285	}	285	}
286	/** Resume the former interrupt vector */	286	/** Resume the former interrupt vector */
287	void i8042_release(void)	287	void i8042_release(void)
288	{	288	{
289	if (oldvector)	289	if (oldvector)
290	exc_register(VECTOR_KBD, "user_interrupt", oldvector);	290	exc_register(VECTOR_KBD, "user_interrupt", oldvector);
291	}	291	}
292		292
293	/** Initialize i8042. */	293	/** Initialize i8042. */
294	void i8042_init(void)	294	void i8042_init(void)
295	{	295	{
296	int i;	296	int i;
297		297
298	i8042_grab();	298	i8042_grab();
299	/* Prevent user from accidentaly releasing calling i8042_resume	299	/* Prevent user from accidentaly releasing calling i8042_resume
300	* and disabling keyboard	300	* and disabling keyboard
301	*/	301	*/
302	oldvector = NULL;	302	oldvector = NULL;
303		303
304	trap_virtual_enable_irqs(1<<IRQ_KBD);	304	trap_virtual_enable_irqs(1<<IRQ_KBD);
305	chardev_initialize("i8042_kbd", &kbrd, &ops);	305	chardev_initialize("i8042_kbd", &kbrd, &ops);
306	stdin = &kbrd;	306	stdin = &kbrd;
307		307
308	/*	308	/*
309	* Clear input buffer.	309	* Clear input buffer.
310	* Number of iterations is limited to prevent infinite looping.	310	* Number of iterations is limited to prevent infinite looping.
311	*/	311	*/
312	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {	312	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
313	i8042_data_read();	313	i8042_data_read();
314	}	314	}
315	}	315	}
316		316
317	/** Process i8042 interrupt.	317	/** Process i8042 interrupt.
318	*	318	*
319	* @param n Interrupt vector.	319	* @param n Interrupt vector.
320	* @param istate Interrupted state.	320	* @param istate Interrupted state.
321	*/	321	*/
322	void i8042_interrupt(int n, istate_t *istate)	322	void i8042_interrupt(int n, istate_t *istate)
323	{	323	{
324	__u8 x;	324	__u8 x;
325		325
326	while ((i8042_status_read() & i8042_BUFFER_FULL_MASK)) {	326	while ((i8042_status_read() & i8042_BUFFER_FULL_MASK)) {
327	x = i8042_data_read();	327	x = i8042_data_read();
328	if (x & KEY_RELEASE)	328	if (x & KEY_RELEASE)
329	key_released(x ^ KEY_RELEASE);	329	key_released(x ^ KEY_RELEASE);
330	else	330	else
331	key_pressed(x);	331	key_pressed(x);
332	}	332	}
333	trap_virtual_eoi();	333	trap_virtual_eoi();
334	}	334	}
335		335
336	/** Wait until the controller reads its data. */	336	/** Wait until the controller reads its data. */
337	void i8042_wait(void) {	337	void i8042_wait(void) {
338	while (i8042_status_read() & i8042_WAIT_MASK) {	338	while (i8042_status_read() & i8042_WAIT_MASK) {
339	/* wait */	339	/* wait */
340	}	340	}
341	}	341	}
342		342
343	/** Process release of key.	343	/** Process release of key.
344	*	344	*
345	* @param sc Scancode of the key being released.	345	* @param sc Scancode of the key being released.
346	*/	346	*/
347	void key_released(__u8 sc)	347	void key_released(__u8 sc)
348	{	348	{
349	spinlock_lock(&keylock);	349	spinlock_lock(&keylock);
350	switch (sc) {	350	switch (sc) {
351	case SC_LSHIFT:	351	case SC_LSHIFT:
352	case SC_RSHIFT:	352	case SC_RSHIFT:
353	keyflags &= ~PRESSED_SHIFT;	353	keyflags &= ~PRESSED_SHIFT;
354	break;	354	break;
355	case SC_CAPSLOCK:	355	case SC_CAPSLOCK:
356	keyflags &= ~PRESSED_CAPSLOCK;	356	keyflags &= ~PRESSED_CAPSLOCK;
357	if (lockflags & LOCKED_CAPSLOCK)	357	if (lockflags & LOCKED_CAPSLOCK)
358	lockflags &= ~LOCKED_CAPSLOCK;	358	lockflags &= ~LOCKED_CAPSLOCK;
359	else	359	else
360	lockflags \|= LOCKED_CAPSLOCK;	360	lockflags \|= LOCKED_CAPSLOCK;
361	break;	361	break;
362	default:	362	default:
363	break;	363	break;
364	}	364	}
365	spinlock_unlock(&keylock);	365	spinlock_unlock(&keylock);
366	}	366	}
367		367
368	/** Process keypress.	368	/** Process keypress.
369	*	369	*
370	* @param sc Scancode of the key being pressed.	370	* @param sc Scancode of the key being pressed.
371	*/	371	*/
372	void key_pressed(__u8 sc)	372	void key_pressed(__u8 sc)
373	{	373	{
374	char *map = sc_primary_map;	374	char *map = sc_primary_map;
375	char ascii = sc_primary_map[sc];	375	char ascii = sc_primary_map[sc];
376	bool shift, capslock;	376	bool shift, capslock;
377	bool letter = false;	377	bool letter = false;
378		378
379	spinlock_lock(&keylock);	379	spinlock_lock(&keylock);
380	switch (sc) {	380	switch (sc) {
381	case SC_LSHIFT:	381	case SC_LSHIFT:
382	case SC_RSHIFT:	382	case SC_RSHIFT:
383	keyflags \|= PRESSED_SHIFT;	383	keyflags \|= PRESSED_SHIFT;
384	break;	384	break;
385	case SC_CAPSLOCK:	385	case SC_CAPSLOCK:
386	keyflags \|= PRESSED_CAPSLOCK;	386	keyflags \|= PRESSED_CAPSLOCK;
387	break;	387	break;
388	case SC_SPEC_ESCAPE:	388	case SC_SPEC_ESCAPE:
389	break;	389	break;
390	case SC_LEFTARR:	390	case SC_LEFTARR:
391	chardev_push_character(&kbrd, 0x1b);	391	chardev_push_character(&kbrd, 0x1b);
392	chardev_push_character(&kbrd, 0x5b);	392	chardev_push_character(&kbrd, 0x5b);
393	chardev_push_character(&kbrd, 0x44);	393	chardev_push_character(&kbrd, 0x44);
394	break;	394	break;
395	case SC_RIGHTARR:	395	case SC_RIGHTARR:
396	chardev_push_character(&kbrd, 0x1b);	396	chardev_push_character(&kbrd, 0x1b);
397	chardev_push_character(&kbrd, 0x5b);	397	chardev_push_character(&kbrd, 0x5b);
398	chardev_push_character(&kbrd, 0x43);	398	chardev_push_character(&kbrd, 0x43);
399	break;	399	break;
400	case SC_UPARR:	400	case SC_UPARR:
401	chardev_push_character(&kbrd, 0x1b);	401	chardev_push_character(&kbrd, 0x1b);
402	chardev_push_character(&kbrd, 0x5b);	402	chardev_push_character(&kbrd, 0x5b);
403	chardev_push_character(&kbrd, 0x41);	403	chardev_push_character(&kbrd, 0x41);
404	break;	404	break;
405	case SC_DOWNARR:	405	case SC_DOWNARR:
406	chardev_push_character(&kbrd, 0x1b);	406	chardev_push_character(&kbrd, 0x1b);
407	chardev_push_character(&kbrd, 0x5b);	407	chardev_push_character(&kbrd, 0x5b);
408	chardev_push_character(&kbrd, 0x42);	408	chardev_push_character(&kbrd, 0x42);
409	break;	409	break;
410	case SC_HOME:	410	case SC_HOME:
411	chardev_push_character(&kbrd, 0x1b);	411	chardev_push_character(&kbrd, 0x1b);
412	chardev_push_character(&kbrd, 0x4f);	412	chardev_push_character(&kbrd, 0x4f);
413	chardev_push_character(&kbrd, 0x48);	413	chardev_push_character(&kbrd, 0x48);
414	break;	414	break;
415	case SC_END:	415	case SC_END:
416	chardev_push_character(&kbrd, 0x1b);	416	chardev_push_character(&kbrd, 0x1b);
417	chardev_push_character(&kbrd, 0x4f);	417	chardev_push_character(&kbrd, 0x4f);
418	chardev_push_character(&kbrd, 0x46);	418	chardev_push_character(&kbrd, 0x46);
419	break;	419	break;
420	case SC_DELETE:	420	case SC_DELETE:
421	chardev_push_character(&kbrd, 0x1b);	421	chardev_push_character(&kbrd, 0x1b);
422	chardev_push_character(&kbrd, 0x5b);	422	chardev_push_character(&kbrd, 0x5b);
423	chardev_push_character(&kbrd, 0x33);	423	chardev_push_character(&kbrd, 0x33);
424	chardev_push_character(&kbrd, 0x7e);	424	chardev_push_character(&kbrd, 0x7e);
425	break;	425	break;
426	default:	426	default:
427	letter = is_lower(ascii);	427	letter = is_lower(ascii);
428	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);	428	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);
429	shift = keyflags & PRESSED_SHIFT;	429	shift = keyflags & PRESSED_SHIFT;
430	if (letter && capslock)	430	if (letter && capslock)
431	shift = !shift;	431	shift = !shift;
432	if (shift)	432	if (shift)
433	map = sc_secondary_map;	433	map = sc_secondary_map;
434	chardev_push_character(&kbrd, map[sc]);	434	chardev_push_character(&kbrd, map[sc]);
435	break;	435	break;
436	}	436	}
437	spinlock_unlock(&keylock);	437	spinlock_unlock(&keylock);
438	}	438	}
439		439
440	/* Called from getc(). */	440	/* Called from getc(). */
441	void i8042_resume(chardev_t *d)	441	void i8042_resume(chardev_t *d)
442	{	442	{
443	}	443	}
444		444
445	/* Called from getc(). */	445	/* Called from getc(). */
446	void i8042_suspend(chardev_t *d)	446	void i8042_suspend(chardev_t *d)
447	{	447	{
448	}	448	}
449		449
450	static __u8 active_read_buff_read(void)	450	static __u8 active_read_buff_read(void)
451	{	451	{
452	static int i=0;	452	static int i=0;
453	i &= (ACTIVE_READ_BUFF_SIZE-1);	453	i &= (ACTIVE_READ_BUFF_SIZE-1);
454	if(!active_read_buff[i]) {	454	if(!active_read_buff[i]) {
455	return 0;	455	return 0;
456	}	456	}
457	return active_read_buff[i++];	457	return active_read_buff[i++];
458	}	458	}
459		459
460	static void active_read_buff_write(__u8 ch)	460	static void active_read_buff_write(__u8 ch)
461	{	461	{
462	static int i=0;	462	static int i=0;
463	active_read_buff[i] = ch;	463	active_read_buff[i] = ch;
464	i++;	464	i++;
465	i &= (ACTIVE_READ_BUFF_SIZE-1);	465	i &= (ACTIVE_READ_BUFF_SIZE-1);
466	active_read_buff[i]=0;	466	active_read_buff[i]=0;
467	}	467	}
468		468
469		469
470	static void active_read_key_pressed(__u8 sc)	470	static void active_read_key_pressed(__u8 sc)
471	{	471	{
472	char *map = sc_primary_map;	472	char *map = sc_primary_map;
473	char ascii = sc_primary_map[sc];	473	char ascii = sc_primary_map[sc];
474	bool shift, capslock;	474	bool shift, capslock;
475	bool letter = false;	475	bool letter = false;
476		476
477	/spinlock_lock(&keylock);/	477	/spinlock_lock(&keylock);/
478	switch (sc) {	478	switch (sc) {
479	case SC_LSHIFT:	479	case SC_LSHIFT:
480	case SC_RSHIFT:	480	case SC_RSHIFT:
481	keyflags \|= PRESSED_SHIFT;	481	keyflags \|= PRESSED_SHIFT;
482	break;	482	break;
483	case SC_CAPSLOCK:	483	case SC_CAPSLOCK:
484	keyflags \|= PRESSED_CAPSLOCK;	484	keyflags \|= PRESSED_CAPSLOCK;
485	break;	485	break;
486	case SC_SPEC_ESCAPE:	486	case SC_SPEC_ESCAPE:
487	break;	487	break;
488	case SC_LEFTARR:	488	case SC_LEFTARR:
489	active_read_buff_write(0x1b);	489	active_read_buff_write(0x1b);
490	active_read_buff_write(0x5b);	490	active_read_buff_write(0x5b);
491	active_read_buff_write(0x44);	491	active_read_buff_write(0x44);
492	break;	492	break;
493	case SC_RIGHTARR:	493	case SC_RIGHTARR:
494	active_read_buff_write(0x1b);	494	active_read_buff_write(0x1b);
495	active_read_buff_write(0x5b);	495	active_read_buff_write(0x5b);
496	active_read_buff_write(0x43);	496	active_read_buff_write(0x43);
497	break;	497	break;
498	case SC_UPARR:	498	case SC_UPARR:
499	active_read_buff_write(0x1b);	499	active_read_buff_write(0x1b);
500	active_read_buff_write(0x5b);	500	active_read_buff_write(0x5b);

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(root)/kernel/trunk/genarch/src/i8042/i8042.c – Rev 1754 → 1757