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.
 */
 
#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 <print.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)
{
    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
    */
    {
        int a=0;
        while((i8042_status_read()&i8042_BUFFER_FULL_MASK)&&(a<20)) {
        i8042_data_read();
        a++;
        }  
    }
}
 
/** 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 1193	Rev 1194
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 <print.h>	35	#include <print.h>
36	#include <synch/spinlock.h>	36	#include <synch/spinlock.h>
37	#include <typedefs.h>	37	#include <typedefs.h>
38	#include <console/chardev.h>	38	#include <console/chardev.h>
39	#include <console/console.h>	39	#include <console/console.h>
40	#include <macros.h>	40	#include <macros.h>
41	#include <interrupt.h>	41	#include <interrupt.h>
42		42
43	/**	43	/**
44	* i8042 processor driver.	44	* i8042 processor driver.
45	* It takes care of low-level keyboard functions.	45	* It takes care of low-level keyboard functions.
46	*/	46	*/
47		47
48	/** Keyboard commands. */	48	/** Keyboard commands. */
49	#define KBD_ENABLE 0xf4	49	#define KBD_ENABLE 0xf4
50	#define KBD_DISABLE 0xf5	50	#define KBD_DISABLE 0xf5
51	#define KBD_ACK 0xfa	51	#define KBD_ACK 0xfa
52		52
53	/*	53	/*
54	* 60 Write 8042 Command Byte: next data byte written to port 60h is	54	* 60 Write 8042 Command Byte: next data byte written to port 60h is
55	* placed in 8042 command register. Format:	55	* placed in 8042 command register. Format:
56	*	56	*
57	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	57	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
58	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	58	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
59	* \| \| \| \| \| \| `----- should be 0	59	* \| \| \| \| \| \| `----- should be 0
60	* \| \| \| \| \| `------ 1=set status register system, 0=clear	60	* \| \| \| \| \| `------ 1=set status register system, 0=clear
61	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	61	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
62	* \| \| \| `-------- disable keyboard I/O by driving clock line low	62	* \| \| \| `-------- disable keyboard I/O by driving clock line low
63	* \| \| `--------- disable auxiliary device, drives clock line low	63	* \| \| `--------- disable auxiliary device, drives clock line low
64	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	64	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
65	* `----------- reserved, should be 0	65	* `----------- reserved, should be 0
66	*/	66	*/
67		67
68	#define i8042_SET_COMMAND 0x60	68	#define i8042_SET_COMMAND 0x60
69	#define i8042_COMMAND 0x49	69	#define i8042_COMMAND 0x49
70		70
71	#define i8042_BUFFER_FULL_MASK 0x01	71	#define i8042_BUFFER_FULL_MASK 0x01
72	#define i8042_WAIT_MASK 0x02	72	#define i8042_WAIT_MASK 0x02
73		73
74	#define SPECIAL '?'	74	#define SPECIAL '?'
75	#define KEY_RELEASE 0x80	75	#define KEY_RELEASE 0x80
76		76
77	/**	77	/**
78	* These codes read from i8042 data register are silently ignored.	78	* These codes read from i8042 data register are silently ignored.
79	*/	79	*/
80	#define IGNORE_CODE 0x7f	80	#define IGNORE_CODE 0x7f
81		81
82	static void key_released(__u8 sc);	82	static void key_released(__u8 sc);
83	static void key_pressed(__u8 sc);	83	static void key_pressed(__u8 sc);
84	static char key_read(chardev_t *d);	84	static char key_read(chardev_t *d);
85		85
86	#define PRESSED_SHIFT (1<<0)	86	#define PRESSED_SHIFT (1<<0)
87	#define PRESSED_CAPSLOCK (1<<1)	87	#define PRESSED_CAPSLOCK (1<<1)
88	#define LOCKED_CAPSLOCK (1<<0)	88	#define LOCKED_CAPSLOCK (1<<0)
89		89
90	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */	90	#define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */
91		91
92	static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];	92	static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];
93		93
94	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /	94	SPINLOCK_INITIALIZE(keylock); /*< keylock protects keyflags and lockflags. /
95	static volatile int keyflags; /*< Tracking of multiple keypresses. /	95	static volatile int keyflags; /*< Tracking of multiple keypresses. /
96	static volatile int lockflags; /*< Tracking of multiple keys lockings. /	96	static volatile int lockflags; /*< Tracking of multiple keys lockings. /
97		97
98	static void i8042_suspend(chardev_t *);	98	static void i8042_suspend(chardev_t *);
99	static void i8042_resume(chardev_t *);	99	static void i8042_resume(chardev_t *);
100		100
101	static chardev_t kbrd;	101	static chardev_t kbrd;
102	static chardev_operations_t ops = {	102	static chardev_operations_t ops = {
103	.suspend = i8042_suspend,	103	.suspend = i8042_suspend,
104	.resume = i8042_resume,	104	.resume = i8042_resume,
105	.read = key_read	105	.read = key_read
106	};	106	};
107		107
108	/** Primary meaning of scancodes. */	108	/** Primary meaning of scancodes. */
109	static char sc_primary_map[] = {	109	static char sc_primary_map[] = {
110	SPECIAL, /* 0x00 */	110	SPECIAL, /* 0x00 */
111	SPECIAL, /* 0x01 - Esc */	111	SPECIAL, /* 0x01 - Esc */
112	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',	112	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
113	'\b', /* 0x0e - Backspace */	113	'\b', /* 0x0e - Backspace */
114	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',	114	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
115	SPECIAL, /* 0x1d - LCtrl */	115	SPECIAL, /* 0x1d - LCtrl */
116	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',	116	'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
117	'`',	117	'`',
118	SPECIAL, /* 0x2a - LShift */	118	SPECIAL, /* 0x2a - LShift */
119	'\\',	119	'\\',
120	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',	120	'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
121	SPECIAL, /* 0x36 - RShift */	121	SPECIAL, /* 0x36 - RShift */
122	'*',	122	'*',
123	SPECIAL, /* 0x38 - LAlt */	123	SPECIAL, /* 0x38 - LAlt */
124	' ',	124	' ',
125	SPECIAL, /* 0x3a - CapsLock */	125	SPECIAL, /* 0x3a - CapsLock */
126	SPECIAL, /* 0x3b - F1 */	126	SPECIAL, /* 0x3b - F1 */
127	SPECIAL, /* 0x3c - F2 */	127	SPECIAL, /* 0x3c - F2 */
128	SPECIAL, /* 0x3d - F3 */	128	SPECIAL, /* 0x3d - F3 */
129	SPECIAL, /* 0x3e - F4 */	129	SPECIAL, /* 0x3e - F4 */
130	SPECIAL, /* 0x3f - F5 */	130	SPECIAL, /* 0x3f - F5 */
131	SPECIAL, /* 0x40 - F6 */	131	SPECIAL, /* 0x40 - F6 */
132	SPECIAL, /* 0x41 - F7 */	132	SPECIAL, /* 0x41 - F7 */
133	SPECIAL, /* 0x42 - F8 */	133	SPECIAL, /* 0x42 - F8 */
134	SPECIAL, /* 0x43 - F9 */	134	SPECIAL, /* 0x43 - F9 */
135	SPECIAL, /* 0x44 - F10 */	135	SPECIAL, /* 0x44 - F10 */
136	SPECIAL, /* 0x45 - NumLock */	136	SPECIAL, /* 0x45 - NumLock */
137	SPECIAL, /* 0x46 - ScrollLock */	137	SPECIAL, /* 0x46 - ScrollLock */
138	'7', '8', '9', '-',	138	'7', '8', '9', '-',
139	'4', '5', '6', '+',	139	'4', '5', '6', '+',
140	'1', '2', '3',	140	'1', '2', '3',
141	'0', '.',	141	'0', '.',
142	SPECIAL, /* 0x54 - Alt-SysRq */	142	SPECIAL, /* 0x54 - Alt-SysRq */
143	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	143	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
144	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	144	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
145	SPECIAL, /* 0x57 - F11 */	145	SPECIAL, /* 0x57 - F11 */
146	SPECIAL, /* 0x58 - F12 */	146	SPECIAL, /* 0x58 - F12 */
147	SPECIAL, /* 0x59 */	147	SPECIAL, /* 0x59 */
148	SPECIAL, /* 0x5a */	148	SPECIAL, /* 0x5a */
149	SPECIAL, /* 0x5b */	149	SPECIAL, /* 0x5b */
150	SPECIAL, /* 0x5c */	150	SPECIAL, /* 0x5c */
151	SPECIAL, /* 0x5d */	151	SPECIAL, /* 0x5d */
152	SPECIAL, /* 0x5e */	152	SPECIAL, /* 0x5e */
153	SPECIAL, /* 0x5f */	153	SPECIAL, /* 0x5f */
154	SPECIAL, /* 0x60 */	154	SPECIAL, /* 0x60 */
155	SPECIAL, /* 0x61 */	155	SPECIAL, /* 0x61 */
156	SPECIAL, /* 0x62 */	156	SPECIAL, /* 0x62 */
157	SPECIAL, /* 0x63 */	157	SPECIAL, /* 0x63 */
158	SPECIAL, /* 0x64 */	158	SPECIAL, /* 0x64 */
159	SPECIAL, /* 0x65 */	159	SPECIAL, /* 0x65 */
160	SPECIAL, /* 0x66 */	160	SPECIAL, /* 0x66 */
161	SPECIAL, /* 0x67 */	161	SPECIAL, /* 0x67 */
162	SPECIAL, /* 0x68 */	162	SPECIAL, /* 0x68 */
163	SPECIAL, /* 0x69 */	163	SPECIAL, /* 0x69 */
164	SPECIAL, /* 0x6a */	164	SPECIAL, /* 0x6a */
165	SPECIAL, /* 0x6b */	165	SPECIAL, /* 0x6b */
166	SPECIAL, /* 0x6c */	166	SPECIAL, /* 0x6c */
167	SPECIAL, /* 0x6d */	167	SPECIAL, /* 0x6d */
168	SPECIAL, /* 0x6e */	168	SPECIAL, /* 0x6e */
169	SPECIAL, /* 0x6f */	169	SPECIAL, /* 0x6f */
170	SPECIAL, /* 0x70 */	170	SPECIAL, /* 0x70 */
171	SPECIAL, /* 0x71 */	171	SPECIAL, /* 0x71 */
172	SPECIAL, /* 0x72 */	172	SPECIAL, /* 0x72 */
173	SPECIAL, /* 0x73 */	173	SPECIAL, /* 0x73 */
174	SPECIAL, /* 0x74 */	174	SPECIAL, /* 0x74 */
175	SPECIAL, /* 0x75 */	175	SPECIAL, /* 0x75 */
176	SPECIAL, /* 0x76 */	176	SPECIAL, /* 0x76 */
177	SPECIAL, /* 0x77 */	177	SPECIAL, /* 0x77 */
178	SPECIAL, /* 0x78 */	178	SPECIAL, /* 0x78 */
179	SPECIAL, /* 0x79 */	179	SPECIAL, /* 0x79 */
180	SPECIAL, /* 0x7a */	180	SPECIAL, /* 0x7a */
181	SPECIAL, /* 0x7b */	181	SPECIAL, /* 0x7b */
182	SPECIAL, /* 0x7c */	182	SPECIAL, /* 0x7c */
183	SPECIAL, /* 0x7d */	183	SPECIAL, /* 0x7d */
184	SPECIAL, /* 0x7e */	184	SPECIAL, /* 0x7e */
185	SPECIAL, /* 0x7f */	185	SPECIAL, /* 0x7f */
186	};	186	};
187		187
188	/** Secondary meaning of scancodes. */	188	/** Secondary meaning of scancodes. */
189	static char sc_secondary_map[] = {	189	static char sc_secondary_map[] = {
190	SPECIAL, /* 0x00 */	190	SPECIAL, /* 0x00 */
191	SPECIAL, /* 0x01 - Esc */	191	SPECIAL, /* 0x01 - Esc */
192	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',	192	'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
193	SPECIAL, /* 0x0e - Backspace */	193	SPECIAL, /* 0x0e - Backspace */
194	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',	194	'\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
195	SPECIAL, /* 0x1d - LCtrl */	195	SPECIAL, /* 0x1d - LCtrl */
196	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',	196	'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
197	'~',	197	'~',
198	SPECIAL, /* 0x2a - LShift */	198	SPECIAL, /* 0x2a - LShift */
199	'\|',	199	'\|',
200	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',	200	'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
201	SPECIAL, /* 0x36 - RShift */	201	SPECIAL, /* 0x36 - RShift */
202	'*',	202	'*',
203	SPECIAL, /* 0x38 - LAlt */	203	SPECIAL, /* 0x38 - LAlt */
204	' ',	204	' ',
205	SPECIAL, /* 0x3a - CapsLock */	205	SPECIAL, /* 0x3a - CapsLock */
206	SPECIAL, /* 0x3b - F1 */	206	SPECIAL, /* 0x3b - F1 */
207	SPECIAL, /* 0x3c - F2 */	207	SPECIAL, /* 0x3c - F2 */
208	SPECIAL, /* 0x3d - F3 */	208	SPECIAL, /* 0x3d - F3 */
209	SPECIAL, /* 0x3e - F4 */	209	SPECIAL, /* 0x3e - F4 */
210	SPECIAL, /* 0x3f - F5 */	210	SPECIAL, /* 0x3f - F5 */
211	SPECIAL, /* 0x40 - F6 */	211	SPECIAL, /* 0x40 - F6 */
212	SPECIAL, /* 0x41 - F7 */	212	SPECIAL, /* 0x41 - F7 */
213	SPECIAL, /* 0x42 - F8 */	213	SPECIAL, /* 0x42 - F8 */
214	SPECIAL, /* 0x43 - F9 */	214	SPECIAL, /* 0x43 - F9 */
215	SPECIAL, /* 0x44 - F10 */	215	SPECIAL, /* 0x44 - F10 */
216	SPECIAL, /* 0x45 - NumLock */	216	SPECIAL, /* 0x45 - NumLock */
217	SPECIAL, /* 0x46 - ScrollLock */	217	SPECIAL, /* 0x46 - ScrollLock */
218	'7', '8', '9', '-',	218	'7', '8', '9', '-',
219	'4', '5', '6', '+',	219	'4', '5', '6', '+',
220	'1', '2', '3',	220	'1', '2', '3',
221	'0', '.',	221	'0', '.',
222	SPECIAL, /* 0x54 - Alt-SysRq */	222	SPECIAL, /* 0x54 - Alt-SysRq */
223	SPECIAL, /* 0x55 - F11/F12/PF1/FN */	223	SPECIAL, /* 0x55 - F11/F12/PF1/FN */
224	SPECIAL, /* 0x56 - unlabelled key next to LAlt */	224	SPECIAL, /* 0x56 - unlabelled key next to LAlt */
225	SPECIAL, /* 0x57 - F11 */	225	SPECIAL, /* 0x57 - F11 */
226	SPECIAL, /* 0x58 - F12 */	226	SPECIAL, /* 0x58 - F12 */
227	SPECIAL, /* 0x59 */	227	SPECIAL, /* 0x59 */
228	SPECIAL, /* 0x5a */	228	SPECIAL, /* 0x5a */
229	SPECIAL, /* 0x5b */	229	SPECIAL, /* 0x5b */
230	SPECIAL, /* 0x5c */	230	SPECIAL, /* 0x5c */
231	SPECIAL, /* 0x5d */	231	SPECIAL, /* 0x5d */
232	SPECIAL, /* 0x5e */	232	SPECIAL, /* 0x5e */
233	SPECIAL, /* 0x5f */	233	SPECIAL, /* 0x5f */
234	SPECIAL, /* 0x60 */	234	SPECIAL, /* 0x60 */
235	SPECIAL, /* 0x61 */	235	SPECIAL, /* 0x61 */
236	SPECIAL, /* 0x62 */	236	SPECIAL, /* 0x62 */
237	SPECIAL, /* 0x63 */	237	SPECIAL, /* 0x63 */
238	SPECIAL, /* 0x64 */	238	SPECIAL, /* 0x64 */
239	SPECIAL, /* 0x65 */	239	SPECIAL, /* 0x65 */
240	SPECIAL, /* 0x66 */	240	SPECIAL, /* 0x66 */
241	SPECIAL, /* 0x67 */	241	SPECIAL, /* 0x67 */
242	SPECIAL, /* 0x68 */	242	SPECIAL, /* 0x68 */
243	SPECIAL, /* 0x69 */	243	SPECIAL, /* 0x69 */
244	SPECIAL, /* 0x6a */	244	SPECIAL, /* 0x6a */
245	SPECIAL, /* 0x6b */	245	SPECIAL, /* 0x6b */
246	SPECIAL, /* 0x6c */	246	SPECIAL, /* 0x6c */
247	SPECIAL, /* 0x6d */	247	SPECIAL, /* 0x6d */
248	SPECIAL, /* 0x6e */	248	SPECIAL, /* 0x6e */
249	SPECIAL, /* 0x6f */	249	SPECIAL, /* 0x6f */
250	SPECIAL, /* 0x70 */	250	SPECIAL, /* 0x70 */
251	SPECIAL, /* 0x71 */	251	SPECIAL, /* 0x71 */
252	SPECIAL, /* 0x72 */	252	SPECIAL, /* 0x72 */
253	SPECIAL, /* 0x73 */	253	SPECIAL, /* 0x73 */
254	SPECIAL, /* 0x74 */	254	SPECIAL, /* 0x74 */
255	SPECIAL, /* 0x75 */	255	SPECIAL, /* 0x75 */
256	SPECIAL, /* 0x76 */	256	SPECIAL, /* 0x76 */
257	SPECIAL, /* 0x77 */	257	SPECIAL, /* 0x77 */
258	SPECIAL, /* 0x78 */	258	SPECIAL, /* 0x78 */
259	SPECIAL, /* 0x79 */	259	SPECIAL, /* 0x79 */
260	SPECIAL, /* 0x7a */	260	SPECIAL, /* 0x7a */
261	SPECIAL, /* 0x7b */	261	SPECIAL, /* 0x7b */
262	SPECIAL, /* 0x7c */	262	SPECIAL, /* 0x7c */
263	SPECIAL, /* 0x7d */	263	SPECIAL, /* 0x7d */
264	SPECIAL, /* 0x7e */	264	SPECIAL, /* 0x7e */
265	SPECIAL, /* 0x7f */	265	SPECIAL, /* 0x7f */
266	};	266	};
267		267
268	static void i8042_interrupt(int n, istate_t *istate);	268	static void i8042_interrupt(int n, istate_t *istate);
269	static void i8042_wait(void);	269	static void i8042_wait(void);
270		270
271	/** Initialize i8042. */	271	/** Initialize i8042. */
272	void i8042_init(void)	272	void i8042_init(void)
273	{	273	{
274	exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);	274	exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
275	i8042_wait();	275	i8042_wait();
276	i8042_command_write(i8042_SET_COMMAND);	276	i8042_command_write(i8042_SET_COMMAND);
277	i8042_wait();	277	i8042_wait();
278	i8042_data_write(i8042_COMMAND);	278	i8042_data_write(i8042_COMMAND);
279	i8042_wait();	279	i8042_wait();
280		280
281	trap_virtual_enable_irqs(1<<IRQ_KBD);	281	trap_virtual_enable_irqs(1<<IRQ_KBD);
282	chardev_initialize("i8042_kbd", &kbrd, &ops);	282	chardev_initialize("i8042_kbd", &kbrd, &ops);
283	stdin = &kbrd;	283	stdin = &kbrd;
-		284	/*
-		285	* Clear input buffer
-		286	*/
284	{	287	{
285	int a=0;	288	int a=0;
286	while(a<20) {i8042_data_read();a++;} /Clear input buffer/	289	while((i8042_status_read()&i8042_BUFFER_FULL_MASK)&&(a<20)) {
-		290	i8042_data_read();
-		291	a++;
-		292	}
287	}	293	}
288	}	294	}
289		295
290	/** Process i8042 interrupt.	296	/** Process i8042 interrupt.
291	*	297	*
292	* @param n Interrupt vector.	298	* @param n Interrupt vector.
293	* @param stack Interrupted stack.	299	* @param stack Interrupted stack.
294	*/	300	*/
295	void i8042_interrupt(int n, istate_t *istate)	301	void i8042_interrupt(int n, istate_t *istate)
296	{	302	{
297	__u8 x;	303	__u8 x;
298		304
299	trap_virtual_eoi();	305	trap_virtual_eoi();
300	x = i8042_data_read();	306	x = i8042_data_read();
301	if (x & KEY_RELEASE)	307	if (x & KEY_RELEASE)
302	key_released(x ^ KEY_RELEASE);	308	key_released(x ^ KEY_RELEASE);
303	else	309	else
304	key_pressed(x);	310	key_pressed(x);
305	}	311	}
306		312
307	/** Wait until the controller reads its data. */	313	/** Wait until the controller reads its data. */
308	void i8042_wait(void) {	314	void i8042_wait(void) {
309	while (i8042_status_read() & i8042_WAIT_MASK) {	315	while (i8042_status_read() & i8042_WAIT_MASK) {
310	/* wait */	316	/* wait */
311	}	317	}
312	}	318	}
313		319
314	/** Process release of key.	320	/** Process release of key.
315	*	321	*
316	* @param sc Scancode of the key being released.	322	* @param sc Scancode of the key being released.
317	*/	323	*/
318	void key_released(__u8 sc)	324	void key_released(__u8 sc)
319	{	325	{
320	spinlock_lock(&keylock);	326	spinlock_lock(&keylock);
321	switch (sc) {	327	switch (sc) {
322	case SC_LSHIFT:	328	case SC_LSHIFT:
323	case SC_RSHIFT:	329	case SC_RSHIFT:
324	keyflags &= ~PRESSED_SHIFT;	330	keyflags &= ~PRESSED_SHIFT;
325	break;	331	break;
326	case SC_CAPSLOCK:	332	case SC_CAPSLOCK:
327	keyflags &= ~PRESSED_CAPSLOCK;	333	keyflags &= ~PRESSED_CAPSLOCK;
328	if (lockflags & LOCKED_CAPSLOCK)	334	if (lockflags & LOCKED_CAPSLOCK)
329	lockflags &= ~LOCKED_CAPSLOCK;	335	lockflags &= ~LOCKED_CAPSLOCK;
330	else	336	else
331	lockflags \|= LOCKED_CAPSLOCK;	337	lockflags \|= LOCKED_CAPSLOCK;
332	break;	338	break;
333	default:	339	default:
334	break;	340	break;
335	}	341	}
336	spinlock_unlock(&keylock);	342	spinlock_unlock(&keylock);
337	}	343	}
338		344
339	/** Process keypress.	345	/** Process keypress.
340	*	346	*
341	* @param sc Scancode of the key being pressed.	347	* @param sc Scancode of the key being pressed.
342	*/	348	*/
343	void key_pressed(__u8 sc)	349	void key_pressed(__u8 sc)
344	{	350	{
345	char *map = sc_primary_map;	351	char *map = sc_primary_map;
346	char ascii = sc_primary_map[sc];	352	char ascii = sc_primary_map[sc];
347	bool shift, capslock;	353	bool shift, capslock;
348	bool letter = false;	354	bool letter = false;
349		355
350	spinlock_lock(&keylock);	356	spinlock_lock(&keylock);
351	switch (sc) {	357	switch (sc) {
352	case SC_LSHIFT:	358	case SC_LSHIFT:
353	case SC_RSHIFT:	359	case SC_RSHIFT:
354	keyflags \|= PRESSED_SHIFT;	360	keyflags \|= PRESSED_SHIFT;
355	break;	361	break;
356	case SC_CAPSLOCK:	362	case SC_CAPSLOCK:
357	keyflags \|= PRESSED_CAPSLOCK;	363	keyflags \|= PRESSED_CAPSLOCK;
358	break;	364	break;
359	case SC_SPEC_ESCAPE:	365	case SC_SPEC_ESCAPE:
360	break;	366	break;
361	case SC_LEFTARR:	367	case SC_LEFTARR:
362	chardev_push_character(&kbrd, 0x1b);	368	chardev_push_character(&kbrd, 0x1b);
363	chardev_push_character(&kbrd, 0x5b);	369	chardev_push_character(&kbrd, 0x5b);
364	chardev_push_character(&kbrd, 0x44);	370	chardev_push_character(&kbrd, 0x44);
365	break;	371	break;
366	case SC_RIGHTARR:	372	case SC_RIGHTARR:
367	chardev_push_character(&kbrd, 0x1b);	373	chardev_push_character(&kbrd, 0x1b);
368	chardev_push_character(&kbrd, 0x5b);	374	chardev_push_character(&kbrd, 0x5b);
369	chardev_push_character(&kbrd, 0x43);	375	chardev_push_character(&kbrd, 0x43);
370	break;	376	break;
371	case SC_UPARR:	377	case SC_UPARR:
372	chardev_push_character(&kbrd, 0x1b);	378	chardev_push_character(&kbrd, 0x1b);
373	chardev_push_character(&kbrd, 0x5b);	379	chardev_push_character(&kbrd, 0x5b);
374	chardev_push_character(&kbrd, 0x41);	380	chardev_push_character(&kbrd, 0x41);
375	break;	381	break;
376	case SC_DOWNARR:	382	case SC_DOWNARR:
377	chardev_push_character(&kbrd, 0x1b);	383	chardev_push_character(&kbrd, 0x1b);
378	chardev_push_character(&kbrd, 0x5b);	384	chardev_push_character(&kbrd, 0x5b);
379	chardev_push_character(&kbrd, 0x42);	385	chardev_push_character(&kbrd, 0x42);
380	break;	386	break;
381	case SC_HOME:	387	case SC_HOME:
382	chardev_push_character(&kbrd, 0x1b);	388	chardev_push_character(&kbrd, 0x1b);
383	chardev_push_character(&kbrd, 0x4f);	389	chardev_push_character(&kbrd, 0x4f);
384	chardev_push_character(&kbrd, 0x48);	390	chardev_push_character(&kbrd, 0x48);
385	break;	391	break;
386	case SC_END:	392	case SC_END:
387	chardev_push_character(&kbrd, 0x1b);	393	chardev_push_character(&kbrd, 0x1b);
388	chardev_push_character(&kbrd, 0x4f);	394	chardev_push_character(&kbrd, 0x4f);
389	chardev_push_character(&kbrd, 0x46);	395	chardev_push_character(&kbrd, 0x46);
390	break;	396	break;
391	case SC_DELETE:	397	case SC_DELETE:
392	chardev_push_character(&kbrd, 0x1b);	398	chardev_push_character(&kbrd, 0x1b);
393	chardev_push_character(&kbrd, 0x5b);	399	chardev_push_character(&kbrd, 0x5b);
394	chardev_push_character(&kbrd, 0x33);	400	chardev_push_character(&kbrd, 0x33);
395	chardev_push_character(&kbrd, 0x7e);	401	chardev_push_character(&kbrd, 0x7e);
396	break;	402	break;
397	default:	403	default:
398	letter = is_lower(ascii);	404	letter = is_lower(ascii);
399	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);	405	capslock = (keyflags & PRESSED_CAPSLOCK) \|\| (lockflags & LOCKED_CAPSLOCK);
400	shift = keyflags & PRESSED_SHIFT;	406	shift = keyflags & PRESSED_SHIFT;
401	if (letter && capslock)	407	if (letter && capslock)
402	shift = !shift;	408	shift = !shift;
403	if (shift)	409	if (shift)
404	map = sc_secondary_map;	410	map = sc_secondary_map;
405	chardev_push_character(&kbrd, map[sc]);	411	chardev_push_character(&kbrd, map[sc]);
406	break;	412	break;
407	}	413	}
408	spinlock_unlock(&keylock);	414	spinlock_unlock(&keylock);
409	}	415	}
410		416
411	/* Called from getc(). */	417	/* Called from getc(). */
412	void i8042_resume(chardev_t *d)	418	void i8042_resume(chardev_t *d)
413	{	419	{
414	}	420	}
415		421
416	/* Called from getc(). */	422	/* Called from getc(). */
417	void i8042_suspend(chardev_t *d)	423	void i8042_suspend(chardev_t *d)
418	{	424	{
419	}	425	}
420		426
421	static __u8 active_read_buff_read(void)	427	static __u8 active_read_buff_read(void)
422	{	428	{
423	static int i=0;	429	static int i=0;
424	i &= (ACTIVE_READ_BUFF_SIZE-1);	430	i &= (ACTIVE_READ_BUFF_SIZE-1);
425	if(!active_read_buff[i]) {	431	if(!active_read_buff[i]) {
426	return 0;	432	return 0;
427	}	433	}
428	return active_read_buff[i++];	434	return active_read_buff[i++];
429	}	435	}
430		436
431	static void active_read_buff_write(__u8 ch)	437	static void active_read_buff_write(__u8 ch)
432	{	438	{
433	static int i=0;	439	static int i=0;
434	active_read_buff[i] = ch;	440	active_read_buff[i] = ch;
435	i++;	441	i++;
436	i &= (ACTIVE_READ_BUFF_SIZE-1);	442	i &= (ACTIVE_READ_BUFF_SIZE-1);
437	active_read_buff[i]=0;	443	active_read_buff[i]=0;
438	}	444	}
439		445
440		446
441	static void active_read_key_pressed(__u8 sc)	447	static void active_read_key_pressed(__u8 sc)
442	{	448	{
443	char *map = sc_primary_map;	449	char *map = sc_primary_map;
444	char ascii = sc_primary_map[sc];	450	char ascii = sc_primary_map[sc];
445	bool shift, capslock;	451	bool shift, capslock;
446	bool letter = false;	452	bool letter = false;
447		453
448	/spinlock_lock(&keylock);/	454	/spinlock_lock(&keylock);/
449	switch (sc) {	455	switch (sc) {
450	case SC_LSHIFT:	456	case SC_LSHIFT:
451	case SC_RSHIFT:	457	case SC_RSHIFT:
452	keyflags \|= PRESSED_SHIFT;	458	keyflags \|= PRESSED_SHIFT;
453	break;	459	break;
454	case SC_CAPSLOCK:	460	case SC_CAPSLOCK:
455	keyflags \|= PRESSED_CAPSLOCK;	461	keyflags \|= PRESSED_CAPSLOCK;
456	break;	462	break;
457	case SC_SPEC_ESCAPE:	463	case SC_SPEC_ESCAPE:
458	break;	464	break;
459	case SC_LEFTARR:	465	case SC_LEFTARR:
460	active_read_buff_write(0x1b);	466	active_read_buff_write(0x1b);
461	active_read_buff_write(0x5b);	467	active_read_buff_write(0x5b);
462	active_read_buff_write(0x44);	468	active_read_buff_write(0x44);
463	break;	469	break;
464	case SC_RIGHTARR:	470	case SC_RIGHTARR:
465	active_read_buff_write(0x1b);	471	active_read_buff_write(0x1b);
466	active_read_buff_write(0x5b);	472	active_read_buff_write(0x5b);
467	active_read_buff_write(0x43);	473	active_read_buff_write(0x43);
468	break;	474	break;
469	case SC_UPARR:	475	case SC_UPARR:
470	active_read_buff_write(0x1b);	476	active_read_buff_write(0x1b);
471	active_read_buff_write(0x5b);	477	active_read_buff_write(0x5b);
472	active_read_buff_write(0x41);	478	active_read_buff_write(0x41);
473	break;	479	break;
474	case SC_DOWNARR:	480	case SC_DOWNARR:
475	active_read_buff_write(0x1b);	481	active_read_buff_write(0x1b);
476	active_read_buff_write(0x5b);	482	active_read_buff_write(0x5b);
477	active_read_buff_write(0x42);	483	active_read_buff_write(0x42);
478	break;	484	break;
479	case SC_HOME:	485	case SC_HOME:
480	active_read_buff_write(0x1b);	486	active_read_buff_write(0x1b);
481	active_read_buff_write(0x4f);	487	active_read_buff_write(0x4f);
482	active_read_buff_write(0x48);	488	active_read_buff_write(0x48);
483	break;	489	break;
484	case SC_END:	490	case SC_END:
485	active_read_buff_write(0x1b);	491	active_read_buff_write(0x1b);
486	active_read_buff_write(0x4f);	492	active_read_buff_write(0x4f);
487	active_read_buff_write(0x46);	493	active_read_buff_write(0x46);
488	break;	494	break;
489	case SC_DELETE:	495	case SC_DELETE:
490	active_read_buff_write(0x1b);	496	active_read_buff_write(0x1b);
491	active_read_buff_write(0x5b);	497	active_read_buff_write(0x5b);
492	active_read_buff_write(0x33);	498	active_read_buff_write(0x33);
493	active_read_buff_write(0x7e);	499	active_read_buff_write(0x7e);
494	break;	500	break;

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/genarch/src/i8042/i8042.c – Rev 1193 → 1194