[qemu.git] / hw / pckbd.c

/*
 * QEMU PC keyboard emulation
 * 
 * Copyright (c) 2003 Fabrice Bellard
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "vl.h"

/* debug PC keyboard */
//#define DEBUG_KBD

/* debug PC keyboard : only mouse */
//#define DEBUG_MOUSE

/*	Keyboard Controller Commands */
#define KBD_CCMD_READ_MODE	0x20	/* Read mode bits */
#define KBD_CCMD_WRITE_MODE	0x60	/* Write mode bits */
#define KBD_CCMD_GET_VERSION	0xA1	/* Get controller version */
#define KBD_CCMD_MOUSE_DISABLE	0xA7	/* Disable mouse interface */
#define KBD_CCMD_MOUSE_ENABLE	0xA8	/* Enable mouse interface */
#define KBD_CCMD_TEST_MOUSE	0xA9	/* Mouse interface test */
#define KBD_CCMD_SELF_TEST	0xAA	/* Controller self test */
#define KBD_CCMD_KBD_TEST	0xAB	/* Keyboard interface test */
#define KBD_CCMD_KBD_DISABLE	0xAD	/* Keyboard interface disable */
#define KBD_CCMD_KBD_ENABLE	0xAE	/* Keyboard interface enable */
#define KBD_CCMD_READ_INPORT    0xC0    /* read input port */
#define KBD_CCMD_READ_OUTPORT	0xD0    /* read output port */
#define KBD_CCMD_WRITE_OUTPORT	0xD1    /* write output port */
#define KBD_CCMD_WRITE_OBUF	0xD2
#define KBD_CCMD_WRITE_AUX_OBUF	0xD3    /* Write to output buffer as if
					   initiated by the auxiliary device */
#define KBD_CCMD_WRITE_MOUSE	0xD4	/* Write the following byte to the mouse */
#define KBD_CCMD_DISABLE_A20    0xDD    /* HP vectra only ? */
#define KBD_CCMD_ENABLE_A20     0xDF    /* HP vectra only ? */
#define KBD_CCMD_RESET	        0xFE

/* Keyboard Commands */
#define KBD_CMD_SET_LEDS	0xED	/* Set keyboard leds */
#define KBD_CMD_ECHO     	0xEE
#define KBD_CMD_GET_ID 	        0xF2	/* get keyboard ID */
#define KBD_CMD_SET_RATE	0xF3	/* Set typematic rate */
#define KBD_CMD_ENABLE		0xF4	/* Enable scanning */
#define KBD_CMD_RESET_DISABLE	0xF5	/* reset and disable scanning */
#define KBD_CMD_RESET_ENABLE   	0xF6    /* reset and enable scanning */
#define KBD_CMD_RESET		0xFF	/* Reset */

/* Keyboard Replies */
#define KBD_REPLY_POR		0xAA	/* Power on reset */
#define KBD_REPLY_ACK		0xFA	/* Command ACK */
#define KBD_REPLY_RESEND	0xFE	/* Command NACK, send the cmd again */

/* Status Register Bits */
#define KBD_STAT_OBF 		0x01	/* Keyboard output buffer full */
#define KBD_STAT_IBF 		0x02	/* Keyboard input buffer full */
#define KBD_STAT_SELFTEST	0x04	/* Self test successful */
#define KBD_STAT_CMD		0x08	/* Last write was a command write (0=data) */
#define KBD_STAT_UNLOCKED	0x10	/* Zero if keyboard locked */
#define KBD_STAT_MOUSE_OBF	0x20	/* Mouse output buffer full */
#define KBD_STAT_GTO 		0x40	/* General receive/xmit timeout */
#define KBD_STAT_PERR 		0x80	/* Parity error */

/* Controller Mode Register Bits */
#define KBD_MODE_KBD_INT	0x01	/* Keyboard data generate IRQ1 */
#define KBD_MODE_MOUSE_INT	0x02	/* Mouse data generate IRQ12 */
#define KBD_MODE_SYS 		0x04	/* The system flag (?) */
#define KBD_MODE_NO_KEYLOCK	0x08	/* The keylock doesn't affect the keyboard if set */
#define KBD_MODE_DISABLE_KBD	0x10	/* Disable keyboard interface */
#define KBD_MODE_DISABLE_MOUSE	0x20	/* Disable mouse interface */
#define KBD_MODE_KCC 		0x40	/* Scan code conversion to PC format */
#define KBD_MODE_RFU		0x80

/* Mouse Commands */
#define AUX_SET_SCALE11		0xE6	/* Set 1:1 scaling */
#define AUX_SET_SCALE21		0xE7	/* Set 2:1 scaling */
#define AUX_SET_RES		0xE8	/* Set resolution */
#define AUX_GET_SCALE		0xE9	/* Get scaling factor */
#define AUX_SET_STREAM		0xEA	/* Set stream mode */
#define AUX_POLL		0xEB	/* Poll */
#define AUX_RESET_WRAP		0xEC	/* Reset wrap mode */
#define AUX_SET_WRAP		0xEE	/* Set wrap mode */
#define AUX_SET_REMOTE		0xF0	/* Set remote mode */
#define AUX_GET_TYPE		0xF2	/* Get type */
#define AUX_SET_SAMPLE		0xF3	/* Set sample rate */
#define AUX_ENABLE_DEV		0xF4	/* Enable aux device */
#define AUX_DISABLE_DEV		0xF5	/* Disable aux device */
#define AUX_SET_DEFAULT		0xF6
#define AUX_RESET		0xFF	/* Reset aux device */
#define AUX_ACK			0xFA	/* Command byte ACK. */

#define MOUSE_STATUS_REMOTE     0x40
#define MOUSE_STATUS_ENABLED    0x20
#define MOUSE_STATUS_SCALE21    0x10

#define KBD_QUEUE_SIZE 256

typedef struct {
    uint8_t data[KBD_QUEUE_SIZE];
    int rptr, wptr, count;
} KBDQueue;

typedef struct KBDState {
    KBDQueue queues[2];
    uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
    uint8_t status;
    uint8_t mode;
    /* keyboard state */
    int kbd_write_cmd;
    int scan_enabled;
    /* mouse state */
    int mouse_write_cmd;
    uint8_t mouse_status;
    uint8_t mouse_resolution;
    uint8_t mouse_sample_rate;
    uint8_t mouse_wrap;
    uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */
    uint8_t mouse_detect_state;
    int mouse_dx; /* current values, needed for 'poll' mode */
    int mouse_dy;
    int mouse_dz;
    uint8_t mouse_buttons;
} KBDState;

KBDState kbd_state;
int reset_requested;

/* update irq and KBD_STAT_[MOUSE_]OBF */
/* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
   incorrect, but it avoids having to simulate exact delays */
static void kbd_update_irq(KBDState *s)
{
    int irq12_level, irq1_level;

    irq1_level = 0;    
    irq12_level = 0;    
    s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
    if (s->queues[0].count != 0 ||
        s->queues[1].count != 0) {
        s->status |= KBD_STAT_OBF;
        if (s->queues[1].count != 0) {
            s->status |= KBD_STAT_MOUSE_OBF;
            if (s->mode & KBD_MODE_MOUSE_INT)
                irq12_level = 1;
        } else {
            if ((s->mode & KBD_MODE_KBD_INT) && 
                !(s->mode & KBD_MODE_DISABLE_KBD))
                irq1_level = 1;
        }
    }
    pic_set_irq(1, irq1_level);
    pic_set_irq(12, irq12_level);
}

static void kbd_queue(KBDState *s, int b, int aux)
{
    KBDQueue *q = &s->queues[aux];

#if defined(DEBUG_MOUSE) || defined(DEBUG_KBD)
    if (aux)
        printf("mouse event: 0x%02x\n", b);
#ifdef DEBUG_KBD
    else
        printf("kbd event: 0x%02x\n", b);
#endif
#endif
    if (q->count >= KBD_QUEUE_SIZE)
        return;
    q->data[q->wptr] = b;
    if (++q->wptr == KBD_QUEUE_SIZE)
        q->wptr = 0;
    q->count++;
    kbd_update_irq(s);
}

void kbd_put_keycode(int keycode)
{
    KBDState *s = &kbd_state;
    kbd_queue(s, keycode, 0);
}

static uint32_t kbd_read_status(void *opaque, uint32_t addr)
{
    KBDState *s = opaque;
    int val;
    val = s->status;
#if defined(DEBUG_KBD)
    printf("kbd: read status=0x%02x\n", val);
#endif
    return val;
}

static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val)
{
    KBDState *s = opaque;

#ifdef DEBUG_KBD
    printf("kbd: write cmd=0x%02x\n", val);
#endif
    switch(val) {
    case KBD_CCMD_READ_MODE:
        kbd_queue(s, s->mode, 0);
        break;
    case KBD_CCMD_WRITE_MODE:
    case KBD_CCMD_WRITE_OBUF:
    case KBD_CCMD_WRITE_AUX_OBUF:
    case KBD_CCMD_WRITE_MOUSE:
    case KBD_CCMD_WRITE_OUTPORT:
        s->write_cmd = val;
        break;
    case KBD_CCMD_MOUSE_DISABLE:
        s->mode |= KBD_MODE_DISABLE_MOUSE;
        break;
    case KBD_CCMD_MOUSE_ENABLE:
        s->mode &= ~KBD_MODE_DISABLE_MOUSE;
        break;
    case KBD_CCMD_TEST_MOUSE:
        kbd_queue(s, 0x00, 0);
        break;
    case KBD_CCMD_SELF_TEST:
        s->status |= KBD_STAT_SELFTEST;
        kbd_queue(s, 0x55, 0);
        break;
    case KBD_CCMD_KBD_TEST:
        kbd_queue(s, 0x00, 0);
        break;
    case KBD_CCMD_KBD_DISABLE:
        s->mode |= KBD_MODE_DISABLE_KBD;
        kbd_update_irq(s);
        break;
    case KBD_CCMD_KBD_ENABLE:
        s->mode &= ~KBD_MODE_DISABLE_KBD;
        kbd_update_irq(s);
        break;
    case KBD_CCMD_READ_INPORT:
        kbd_queue(s, 0x00, 0);
        break;
    case KBD_CCMD_READ_OUTPORT:
        /* XXX: check that */
#ifdef TARGET_I386
        val = 0x01 | (((cpu_single_env->a20_mask >> 20) & 1) << 1);
#else
        val = 0x01;
#endif
        if (s->status & KBD_STAT_OBF)
            val |= 0x10;
        if (s->status & KBD_STAT_MOUSE_OBF)
            val |= 0x20;
        kbd_queue(s, val, 0);
        break;
#ifdef TARGET_I386
    case KBD_CCMD_ENABLE_A20:
        cpu_x86_set_a20(cpu_single_env, 1);
        break;
    case KBD_CCMD_DISABLE_A20:
        cpu_x86_set_a20(cpu_single_env, 0);
        break;
#endif
    case KBD_CCMD_RESET:
        reset_requested = 1;
        cpu_interrupt(cpu_single_env, CPU_INTERRUPT_EXIT);
        break;
    case 0xff:
        /* ignore that - I don't know what is its use */
        break;
    default:
        fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val);
        break;
    }
}

static uint32_t kbd_read_data(void *opaque, uint32_t addr)
{
    KBDState *s = opaque;
    KBDQueue *q;
    int val, index;
    
    q = &s->queues[0]; /* first check KBD data */
    if (q->count == 0)
        q = &s->queues[1]; /* then check AUX data */
    if (q->count == 0) {
        /* NOTE: if no data left, we return the last keyboard one
           (needed for EMM386) */
        /* XXX: need a timer to do things correctly */
        q = &s->queues[0];
        index = q->rptr - 1;
        if (index < 0)
            index = KBD_QUEUE_SIZE - 1;
        val = q->data[index];
    } else {
        val = q->data[q->rptr];
        if (++q->rptr == KBD_QUEUE_SIZE)
            q->rptr = 0;
        q->count--;
        /* reading deasserts IRQ */
        if (q == &s->queues[0])
            pic_set_irq(1, 0);
        else
            pic_set_irq(12, 0);
    }
    /* reassert IRQs if data left */
    kbd_update_irq(s);
#ifdef DEBUG_KBD
    printf("kbd: read data=0x%02x\n", val);
#endif
    return val;
}

static void kbd_reset_keyboard(KBDState *s)
{
    s->scan_enabled = 1;
}

static void kbd_write_keyboard(KBDState *s, int val)
{
    switch(s->kbd_write_cmd) {
    default:
    case -1:
        switch(val) {
        case 0x00:
            kbd_queue(s, KBD_REPLY_ACK, 0);
            break;
        case 0x05:
            kbd_queue(s, KBD_REPLY_RESEND, 0);
            break;
        case KBD_CMD_GET_ID:
            kbd_queue(s, KBD_REPLY_ACK, 0);
            kbd_queue(s, 0xab, 0);
            kbd_queue(s, 0x83, 0);
            break;
        case KBD_CMD_ECHO:
            kbd_queue(s, KBD_CMD_ECHO, 0);
            break;
        case KBD_CMD_ENABLE:
            s->scan_enabled = 1;
            kbd_queue(s, KBD_REPLY_ACK, 0);
            break;
        case KBD_CMD_SET_LEDS:
        case KBD_CMD_SET_RATE:
            s->kbd_write_cmd = val;
            kbd_queue(s, KBD_REPLY_ACK, 0);
            break;
        case KBD_CMD_RESET_DISABLE:
            kbd_reset_keyboard(s);
            s->scan_enabled = 0;
            kbd_queue(s, KBD_REPLY_ACK, 0);
            break;
        case KBD_CMD_RESET_ENABLE:
            kbd_reset_keyboard(s);
            s->scan_enabled = 1;
            kbd_queue(s, KBD_REPLY_ACK, 0);
            break;
        case KBD_CMD_RESET:
            kbd_reset_keyboard(s);
            kbd_queue(s, KBD_REPLY_ACK, 0);
            kbd_queue(s, KBD_REPLY_POR, 0);
            break;
        default:
            kbd_queue(s, KBD_REPLY_ACK, 0);
            break;
        }
        break;
    case KBD_CMD_SET_LEDS:
        kbd_queue(s, KBD_REPLY_ACK, 0);
        s->kbd_write_cmd = -1;
        break;
    case KBD_CMD_SET_RATE:
        kbd_queue(s, KBD_REPLY_ACK, 0);
        s->kbd_write_cmd = -1;
        break;
    }
}

static void kbd_mouse_send_packet(KBDState *s)
{
    unsigned int b;
    int dx1, dy1, dz1;

    dx1 = s->mouse_dx;
    dy1 = s->mouse_dy;
    dz1 = s->mouse_dz;
    /* XXX: increase range to 8 bits ? */
    if (dx1 > 127)
        dx1 = 127;
    else if (dx1 < -127)
        dx1 = -127;
    if (dy1 > 127)
        dy1 = 127;
    else if (dy1 < -127)
        dy1 = -127;
    b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07);
    kbd_queue(s, b, 1);
    kbd_queue(s, dx1 & 0xff, 1);
    kbd_queue(s, dy1 & 0xff, 1);
    /* extra byte for IMPS/2 or IMEX */
    switch(s->mouse_type) {
    default:
        break;
    case 3:
        if (dz1 > 127)
            dz1 = 127;
        else if (dz1 < -127)
                dz1 = -127;
        kbd_queue(s, dz1 & 0xff, 1);
        break;
    case 4:
        if (dz1 > 7)
            dz1 = 7;
        else if (dz1 < -7)
            dz1 = -7;
        b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1);
        kbd_queue(s, b, 1);
        break;
    }

    /* update deltas */
    s->mouse_dx -= dx1;
    s->mouse_dy -= dy1;
    s->mouse_dz -= dz1;
}

void kbd_mouse_event(int dx, int dy, int dz, int buttons_state)
{
    KBDState *s = &kbd_state;

    /* check if deltas are recorded when disabled */
    if (!(s->mouse_status & MOUSE_STATUS_ENABLED))
        return;

    s->mouse_dx += dx;
    s->mouse_dy -= dy;
    s->mouse_dz += dz;
    s->mouse_buttons = buttons_state;
    
    if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
        (s->queues[1].count < (KBD_QUEUE_SIZE - 16))) {
        for(;;) {
            /* if not remote, send event. Multiple events are sent if
               too big deltas */
            kbd_mouse_send_packet(s);
            if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0)
                break;
        }
    }
}

static void kbd_write_mouse(KBDState *s, int val)
{
#ifdef DEBUG_MOUSE
    printf("kbd: write mouse 0x%02x\n", val);
#endif
    switch(s->mouse_write_cmd) {
    default:
    case -1:
        /* mouse command */
        if (s->mouse_wrap) {
            if (val == AUX_RESET_WRAP) {
                s->mouse_wrap = 0;
                kbd_queue(s, AUX_ACK, 1);
                return;
            } else if (val != AUX_RESET) {
                kbd_queue(s, val, 1);
                return;
            }
        }
        switch(val) {
        case AUX_SET_SCALE11:
            s->mouse_status &= ~MOUSE_STATUS_SCALE21;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_SET_SCALE21:
            s->mouse_status |= MOUSE_STATUS_SCALE21;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_SET_STREAM:
            s->mouse_status &= ~MOUSE_STATUS_REMOTE;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_SET_WRAP:
            s->mouse_wrap = 1;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_SET_REMOTE:
            s->mouse_status |= MOUSE_STATUS_REMOTE;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_GET_TYPE:
            kbd_queue(s, AUX_ACK, 1);
            kbd_queue(s, s->mouse_type, 1);
            break;
        case AUX_SET_RES:
        case AUX_SET_SAMPLE:
            s->mouse_write_cmd = val;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_GET_SCALE:
            kbd_queue(s, AUX_ACK, 1);
            kbd_queue(s, s->mouse_status, 1);
            kbd_queue(s, s->mouse_resolution, 1);
            kbd_queue(s, s->mouse_sample_rate, 1);
            break;
        case AUX_POLL:
            kbd_queue(s, AUX_ACK, 1);
            kbd_mouse_send_packet(s);
            break;
        case AUX_ENABLE_DEV:
            s->mouse_status |= MOUSE_STATUS_ENABLED;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_DISABLE_DEV:
            s->mouse_status &= ~MOUSE_STATUS_ENABLED;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_SET_DEFAULT:
            s->mouse_sample_rate = 100;
            s->mouse_resolution = 2;
            s->mouse_status = 0;
            kbd_queue(s, AUX_ACK, 1);
            break;
        case AUX_RESET:
            s->mouse_sample_rate = 100;
            s->mouse_resolution = 2;
            s->mouse_status = 0;
            kbd_queue(s, AUX_ACK, 1);
            kbd_queue(s, 0xaa, 1);
            kbd_queue(s, s->mouse_type, 1);
            break;
        default:
            break;
        }
        break;
    case AUX_SET_SAMPLE:
        s->mouse_sample_rate = val;
#if 0
        /* detect IMPS/2 or IMEX */
        switch(s->mouse_detect_state) {
        default:
        case 0:
            if (val == 200)
                s->mouse_detect_state = 1;
            break;
        case 1:
            if (val == 100)
                s->mouse_detect_state = 2;
            else if (val == 200)
                s->mouse_detect_state = 3;
            else
                s->mouse_detect_state = 0;
            break;
        case 2:
            if (val == 80) 
                s->mouse_type = 3; /* IMPS/2 */
            s->mouse_detect_state = 0;
            break;
        case 3:
            if (val == 80) 
                s->mouse_type = 4; /* IMEX */
            s->mouse_detect_state = 0;
            break;
        }
#endif
        kbd_queue(s, AUX_ACK, 1);
        s->mouse_write_cmd = -1;
        break;
    case AUX_SET_RES:
        s->mouse_resolution = val;
        kbd_queue(s, AUX_ACK, 1);
        s->mouse_write_cmd = -1;
        break;
    }
}

void kbd_write_data(void *opaque, uint32_t addr, uint32_t val)
{
    KBDState *s = opaque;

#ifdef DEBUG_KBD
    printf("kbd: write data=0x%02x\n", val);
#endif

    switch(s->write_cmd) {
    case 0:
        kbd_write_keyboard(s, val);
        break;
    case KBD_CCMD_WRITE_MODE:
        s->mode = val;
        kbd_update_irq(s);
        break;
    case KBD_CCMD_WRITE_OBUF:
        kbd_queue(s, val, 0);
        break;
    case KBD_CCMD_WRITE_AUX_OBUF:
        kbd_queue(s, val, 1);
        break;
    case KBD_CCMD_WRITE_OUTPORT:
#ifdef TARGET_I386
        cpu_x86_set_a20(cpu_single_env, (val >> 1) & 1);
#endif
        if (!(val & 1)) {
            reset_requested = 1;
            cpu_interrupt(cpu_single_env, CPU_INTERRUPT_EXIT);
        }
        break;
    case KBD_CCMD_WRITE_MOUSE:
        kbd_write_mouse(s, val);
        break;
    default:
        break;
    }
    s->write_cmd = 0;
}

void kbd_reset(KBDState *s)
{
    KBDQueue *q;
    int i;

    s->kbd_write_cmd = -1;
    s->mouse_write_cmd = -1;
    s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
    s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
    for(i = 0; i < 2; i++) {
        q = &s->queues[i];
        q->rptr = 0;
        q->wptr = 0;
        q->count = 0;
    }
}

void kbd_init(void)
{
    KBDState *s = &kbd_state;
    
    kbd_reset(s);
    register_ioport_read(0x60, 1, 1, kbd_read_data, s);
    register_ioport_write(0x60, 1, 1, kbd_write_data, s);
    register_ioport_read(0x64, 1, 1, kbd_read_status, s);
    register_ioport_write(0x64, 1, 1, kbd_write_command, s);
}
Commit	Line	Data
80cabfad FB	1	/*
	2	* QEMU PC keyboard emulation
	3	*
	4	* Copyright (c) 2003 Fabrice Bellard
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
80cabfad FB	24	#include "vl.h"
	25
	26	/* debug PC keyboard */
	27	//#define DEBUG_KBD
	28
	29	/* debug PC keyboard : only mouse */
	30	//#define DEBUG_MOUSE
	31
	32	/* Keyboard Controller Commands */
	33	#define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */
	34	#define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */
	35	#define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */
	36	#define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */
	37	#define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */
	38	#define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */
	39	#define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */
	40	#define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */
	41	#define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */
	42	#define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */
	43	#define KBD_CCMD_READ_INPORT 0xC0 /* read input port */
	44	#define KBD_CCMD_READ_OUTPORT 0xD0 /* read output port */
	45	#define KBD_CCMD_WRITE_OUTPORT 0xD1 /* write output port */
	46	#define KBD_CCMD_WRITE_OBUF 0xD2
	47	#define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if
	48	initiated by the auxiliary device */
	49	#define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */
	50	#define KBD_CCMD_DISABLE_A20 0xDD /* HP vectra only ? */
	51	#define KBD_CCMD_ENABLE_A20 0xDF /* HP vectra only ? */
	52	#define KBD_CCMD_RESET 0xFE
	53
	54	/* Keyboard Commands */
	55	#define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
	56	#define KBD_CMD_ECHO 0xEE
	57	#define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */
	58	#define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
	59	#define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
	60	#define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */
	61	#define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */
	62	#define KBD_CMD_RESET 0xFF /* Reset */
	63
	64	/* Keyboard Replies */
	65	#define KBD_REPLY_POR 0xAA /* Power on reset */
	66	#define KBD_REPLY_ACK 0xFA /* Command ACK */
	67	#define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
	68
	69	/* Status Register Bits */
	70	#define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
	71	#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
	72	#define KBD_STAT_SELFTEST 0x04 /* Self test successful */
	73	#define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */
	74	#define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */
	75	#define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
	76	#define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */
	77	#define KBD_STAT_PERR 0x80 /* Parity error */
	78
	79	/* Controller Mode Register Bits */
	80	#define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */
	81	#define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */
	82	#define KBD_MODE_SYS 0x04 /* The system flag (?) */
	83	#define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */
	84	#define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */
	85	#define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */
	86	#define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */
	87	#define KBD_MODE_RFU 0x80
88
89	/* Mouse Commands */
90	#define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */
91	#define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */
92	#define AUX_SET_RES 0xE8 /* Set resolution */
93	#define AUX_GET_SCALE 0xE9 /* Get scaling factor */
94	#define AUX_SET_STREAM 0xEA /* Set stream mode */
95	#define AUX_POLL 0xEB /* Poll */
96	#define AUX_RESET_WRAP 0xEC /* Reset wrap mode */
97	#define AUX_SET_WRAP 0xEE /* Set wrap mode */
98	#define AUX_SET_REMOTE 0xF0 /* Set remote mode */
99	#define AUX_GET_TYPE 0xF2 /* Get type */
100	#define AUX_SET_SAMPLE 0xF3 /* Set sample rate */
101	#define AUX_ENABLE_DEV 0xF4 /* Enable aux device */
102	#define AUX_DISABLE_DEV 0xF5 /* Disable aux device */
103	#define AUX_SET_DEFAULT 0xF6
104	#define AUX_RESET 0xFF /* Reset aux device */
105	#define AUX_ACK 0xFA /* Command byte ACK. */
106
107	#define MOUSE_STATUS_REMOTE 0x40
108	#define MOUSE_STATUS_ENABLED 0x20
109	#define MOUSE_STATUS_SCALE21 0x10
110
111	#define KBD_QUEUE_SIZE 256
112
113	typedef struct {
114	uint8_t data[KBD_QUEUE_SIZE];
115	int rptr, wptr, count;
116	} KBDQueue;
117
118	typedef struct KBDState {
119	KBDQueue queues[2];
120	uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
121	uint8_t status;
122	uint8_t mode;
123	/* keyboard state */
124	int kbd_write_cmd;
125	int scan_enabled;
126	/* mouse state */
127	int mouse_write_cmd;
128	uint8_t mouse_status;
129	uint8_t mouse_resolution;
130	uint8_t mouse_sample_rate;
131	uint8_t mouse_wrap;
132	uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */
133	uint8_t mouse_detect_state;
134	int mouse_dx; /* current values, needed for 'poll' mode */
135	int mouse_dy;
136	int mouse_dz;
137	uint8_t mouse_buttons;
138	} KBDState;
139
140	KBDState kbd_state;
141	int reset_requested;
142
143	/* update irq and KBD_STAT_[MOUSE_]OBF */
144	/* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
145	incorrect, but it avoids having to simulate exact delays */
146	static void kbd_update_irq(KBDState *s)
147	{
148	int irq12_level, irq1_level;
149
150	irq1_level = 0;
151	irq12_level = 0;
152	s->status &= ~(KBD_STAT_OBF \| KBD_STAT_MOUSE_OBF);
153	if (s->queues[0].count != 0 \|\|
154	s->queues[1].count != 0) {
155	s->status \|= KBD_STAT_OBF;
156	if (s->queues[1].count != 0) {
157	s->status \|= KBD_STAT_MOUSE_OBF;
158	if (s->mode & KBD_MODE_MOUSE_INT)
159	irq12_level = 1;
160	} else {
161	if ((s->mode & KBD_MODE_KBD_INT) &&
162	!(s->mode & KBD_MODE_DISABLE_KBD))
163	irq1_level = 1;
164	}
165	}
166	pic_set_irq(1, irq1_level);
167	pic_set_irq(12, irq12_level);
168	}
169
170	static void kbd_queue(KBDState *s, int b, int aux)
171	{
b41a2cd1	172	KBDQueue *q = &s->queues[aux];
80cabfad FB	173
	174	#if defined(DEBUG_MOUSE) \|\| defined(DEBUG_KBD)
	175	if (aux)
	176	printf("mouse event: 0x%02x\n", b);
	177	#ifdef DEBUG_KBD
	178	else
	179	printf("kbd event: 0x%02x\n", b);
	180	#endif
	181	#endif
	182	if (q->count >= KBD_QUEUE_SIZE)
	183	return;
	184	q->data[q->wptr] = b;
	185	if (++q->wptr == KBD_QUEUE_SIZE)
	186	q->wptr = 0;
	187	q->count++;
	188	kbd_update_irq(s);
	189	}
	190
	191	void kbd_put_keycode(int keycode)
	192	{
	193	KBDState *s = &kbd_state;
	194	kbd_queue(s, keycode, 0);
	195	}
	196
b41a2cd1	197	static uint32_t kbd_read_status(void *opaque, uint32_t addr)
80cabfad	198	{
b41a2cd1	199	KBDState *s = opaque;
80cabfad FB	200	int val;
	201	val = s->status;
	202	#if defined(DEBUG_KBD)
	203	printf("kbd: read status=0x%02x\n", val);
	204	#endif
	205	return val;
	206	}
	207
b41a2cd1	208	static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val)
80cabfad	209	{
b41a2cd1	210	KBDState *s = opaque;
80cabfad FB	211
	212	#ifdef DEBUG_KBD
	213	printf("kbd: write cmd=0x%02x\n", val);
	214	#endif
	215	switch(val) {
	216	case KBD_CCMD_READ_MODE:
	217	kbd_queue(s, s->mode, 0);
	218	break;
	219	case KBD_CCMD_WRITE_MODE:
	220	case KBD_CCMD_WRITE_OBUF:
	221	case KBD_CCMD_WRITE_AUX_OBUF:
	222	case KBD_CCMD_WRITE_MOUSE:
	223	case KBD_CCMD_WRITE_OUTPORT:
	224	s->write_cmd = val;
	225	break;
	226	case KBD_CCMD_MOUSE_DISABLE:
	227	s->mode \|= KBD_MODE_DISABLE_MOUSE;
	228	break;
	229	case KBD_CCMD_MOUSE_ENABLE:
	230	s->mode &= ~KBD_MODE_DISABLE_MOUSE;
	231	break;
	232	case KBD_CCMD_TEST_MOUSE:
	233	kbd_queue(s, 0x00, 0);
	234	break;
	235	case KBD_CCMD_SELF_TEST:
	236	s->status \|= KBD_STAT_SELFTEST;
	237	kbd_queue(s, 0x55, 0);
	238	break;
	239	case KBD_CCMD_KBD_TEST:
	240	kbd_queue(s, 0x00, 0);
	241	break;
	242	case KBD_CCMD_KBD_DISABLE:
	243	s->mode \|= KBD_MODE_DISABLE_KBD;
	244	kbd_update_irq(s);
	245	break;
	246	case KBD_CCMD_KBD_ENABLE:
	247	s->mode &= ~KBD_MODE_DISABLE_KBD;
	248	kbd_update_irq(s);
	249	break;
	250	case KBD_CCMD_READ_INPORT:
	251	kbd_queue(s, 0x00, 0);
	252	break;
	253	case KBD_CCMD_READ_OUTPORT:
	254	/* XXX: check that */
	255	#ifdef TARGET_I386
	256	val = 0x01 \| (((cpu_single_env->a20_mask >> 20) & 1) << 1);
	257	#else
	258	val = 0x01;
	259	#endif
	260	if (s->status & KBD_STAT_OBF)
	261	val \|= 0x10;
	262	if (s->status & KBD_STAT_MOUSE_OBF)
	263	val \|= 0x20;
	264	kbd_queue(s, val, 0);
	265	break;
	266	#ifdef TARGET_I386
	267	case KBD_CCMD_ENABLE_A20:
b41a2cd1	268	cpu_x86_set_a20(cpu_single_env, 1);
80cabfad FB	269	break;
80cabfad FB	270	case KBD_CCMD_DISABLE_A20:
b41a2cd1	271	cpu_x86_set_a20(cpu_single_env, 0);
80cabfad FB	272	break;
	273	#endif
	274	case KBD_CCMD_RESET:
	275	reset_requested = 1;
	276	cpu_interrupt(cpu_single_env, CPU_INTERRUPT_EXIT);
	277	break;
	278	case 0xff:
	279	/* ignore that - I don't know what is its use */
	280	break;
	281	default:
	282	fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val);
	283	break;
	284	}
	285	}
	286
b41a2cd1	287	static uint32_t kbd_read_data(void *opaque, uint32_t addr)
80cabfad	288	{
b41a2cd1	289	KBDState *s = opaque;
80cabfad FB	290	KBDQueue *q;
	291	int val, index;
	292
	293	q = &s->queues[0]; /* first check KBD data */
	294	if (q->count == 0)
	295	q = &s->queues[1]; /* then check AUX data */
	296	if (q->count == 0) {
	297	/* NOTE: if no data left, we return the last keyboard one
	298	(needed for EMM386) */
	299	/* XXX: need a timer to do things correctly */
	300	q = &s->queues[0];
	301	index = q->rptr - 1;
	302	if (index < 0)
	303	index = KBD_QUEUE_SIZE - 1;
	304	val = q->data[index];
	305	} else {
	306	val = q->data[q->rptr];
	307	if (++q->rptr == KBD_QUEUE_SIZE)
	308	q->rptr = 0;
	309	q->count--;
	310	/* reading deasserts IRQ */
	311	if (q == &s->queues[0])
	312	pic_set_irq(1, 0);
	313	else
	314	pic_set_irq(12, 0);
	315	}
	316	/* reassert IRQs if data left */
	317	kbd_update_irq(s);
	318	#ifdef DEBUG_KBD
	319	printf("kbd: read data=0x%02x\n", val);
	320	#endif
	321	return val;
	322	}
	323
	324	static void kbd_reset_keyboard(KBDState *s)
	325	{
	326	s->scan_enabled = 1;
	327	}
	328
	329	static void kbd_write_keyboard(KBDState *s, int val)
	330	{
	331	switch(s->kbd_write_cmd) {
	332	default:
	333	case -1:
	334	switch(val) {
	335	case 0x00:
	336	kbd_queue(s, KBD_REPLY_ACK, 0);
	337	break;
	338	case 0x05:
	339	kbd_queue(s, KBD_REPLY_RESEND, 0);
	340	break;
	341	case KBD_CMD_GET_ID:
	342	kbd_queue(s, KBD_REPLY_ACK, 0);
	343	kbd_queue(s, 0xab, 0);
	344	kbd_queue(s, 0x83, 0);
	345	break;
	346	case KBD_CMD_ECHO:
	347	kbd_queue(s, KBD_CMD_ECHO, 0);
	348	break;
	349	case KBD_CMD_ENABLE:
	350	s->scan_enabled = 1;
	351	kbd_queue(s, KBD_REPLY_ACK, 0);
	352	break;
	353	case KBD_CMD_SET_LEDS:
354	case KBD_CMD_SET_RATE:
355	s->kbd_write_cmd = val;
356	kbd_queue(s, KBD_REPLY_ACK, 0);
357	break;
358	case KBD_CMD_RESET_DISABLE:
359	kbd_reset_keyboard(s);
360	s->scan_enabled = 0;
361	kbd_queue(s, KBD_REPLY_ACK, 0);
362	break;
363	case KBD_CMD_RESET_ENABLE:
364	kbd_reset_keyboard(s);
365	s->scan_enabled = 1;
366	kbd_queue(s, KBD_REPLY_ACK, 0);
367	break;
368	case KBD_CMD_RESET:
369	kbd_reset_keyboard(s);
370	kbd_queue(s, KBD_REPLY_ACK, 0);
371	kbd_queue(s, KBD_REPLY_POR, 0);
372	break;
373	default:
374	kbd_queue(s, KBD_REPLY_ACK, 0);
375	break;
376	}
377	break;
378	case KBD_CMD_SET_LEDS:
379	kbd_queue(s, KBD_REPLY_ACK, 0);
380	s->kbd_write_cmd = -1;
381	break;
382	case KBD_CMD_SET_RATE:
383	kbd_queue(s, KBD_REPLY_ACK, 0);
384	s->kbd_write_cmd = -1;
385	break;
386	}
387	}
388
389	static void kbd_mouse_send_packet(KBDState *s)
390	{
391	unsigned int b;
392	int dx1, dy1, dz1;
393
394	dx1 = s->mouse_dx;
395	dy1 = s->mouse_dy;
396	dz1 = s->mouse_dz;
397	/* XXX: increase range to 8 bits ? */
398	if (dx1 > 127)
399	dx1 = 127;
400	else if (dx1 < -127)
401	dx1 = -127;
402	if (dy1 > 127)
403	dy1 = 127;
404	else if (dy1 < -127)
405	dy1 = -127;
406	b = 0x08 \| ((dx1 < 0) << 4) \| ((dy1 < 0) << 5) \| (s->mouse_buttons & 0x07);
407	kbd_queue(s, b, 1);
408	kbd_queue(s, dx1 & 0xff, 1);
409	kbd_queue(s, dy1 & 0xff, 1);
410	/* extra byte for IMPS/2 or IMEX */
411	switch(s->mouse_type) {
412	default:
413	break;
414	case 3:
415	if (dz1 > 127)
416	dz1 = 127;
417	else if (dz1 < -127)
418	dz1 = -127;
419	kbd_queue(s, dz1 & 0xff, 1);
420	break;
421	case 4:
422	if (dz1 > 7)
423	dz1 = 7;
424	else if (dz1 < -7)
425	dz1 = -7;
426	b = (dz1 & 0x0f) \| ((s->mouse_buttons & 0x18) << 1);
427	kbd_queue(s, b, 1);
428	break;
429	}
430
431	/* update deltas */
432	s->mouse_dx -= dx1;
433	s->mouse_dy -= dy1;
434	s->mouse_dz -= dz1;
435	}
436
437	void kbd_mouse_event(int dx, int dy, int dz, int buttons_state)
438	{
439	KBDState *s = &kbd_state;
440
441	/* check if deltas are recorded when disabled */
442	if (!(s->mouse_status & MOUSE_STATUS_ENABLED))
443	return;
444
445	s->mouse_dx += dx;
446	s->mouse_dy -= dy;
447	s->mouse_dz += dz;
448	s->mouse_buttons = buttons_state;
449
450	if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
451	(s->queues[1].count < (KBD_QUEUE_SIZE - 16))) {
452	for(;;) {
453	/* if not remote, send event. Multiple events are sent if
454	too big deltas */
455	kbd_mouse_send_packet(s);
456	if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0)
457	break;
458	}
459	}
460	}
461
462	static void kbd_write_mouse(KBDState *s, int val)
463	{
464	#ifdef DEBUG_MOUSE
465	printf("kbd: write mouse 0x%02x\n", val);
466	#endif
467	switch(s->mouse_write_cmd) {
468	default:
469	case -1:
470	/* mouse command */
471	if (s->mouse_wrap) {
472	if (val == AUX_RESET_WRAP) {
473	s->mouse_wrap = 0;
474	kbd_queue(s, AUX_ACK, 1);
475	return;
476	} else if (val != AUX_RESET) {
477	kbd_queue(s, val, 1);
478	return;
479	}
480	}
481	switch(val) {
482	case AUX_SET_SCALE11:
483	s->mouse_status &= ~MOUSE_STATUS_SCALE21;
484	kbd_queue(s, AUX_ACK, 1);
485	break;
486	case AUX_SET_SCALE21:
487	s->mouse_status \|= MOUSE_STATUS_SCALE21;
488	kbd_queue(s, AUX_ACK, 1);
489	break;
490	case AUX_SET_STREAM:
491	s->mouse_status &= ~MOUSE_STATUS_REMOTE;
492	kbd_queue(s, AUX_ACK, 1);
493	break;
494	case AUX_SET_WRAP:
495	s->mouse_wrap = 1;
496	kbd_queue(s, AUX_ACK, 1);
497	break;
498	case AUX_SET_REMOTE:
499	s->mouse_status \|= MOUSE_STATUS_REMOTE;
500	kbd_queue(s, AUX_ACK, 1);
501	break;
502	case AUX_GET_TYPE:
503	kbd_queue(s, AUX_ACK, 1);
504	kbd_queue(s, s->mouse_type, 1);
505	break;
506	case AUX_SET_RES:
507	case AUX_SET_SAMPLE:
508	s->mouse_write_cmd = val;
509	kbd_queue(s, AUX_ACK, 1);
510	break;
511	case AUX_GET_SCALE:
512	kbd_queue(s, AUX_ACK, 1);
513	kbd_queue(s, s->mouse_status, 1);
514	kbd_queue(s, s->mouse_resolution, 1);
515	kbd_queue(s, s->mouse_sample_rate, 1);
516	break;
517	case AUX_POLL:
518	kbd_queue(s, AUX_ACK, 1);
519	kbd_mouse_send_packet(s);
520	break;
521	case AUX_ENABLE_DEV:
522	s->mouse_status \|= MOUSE_STATUS_ENABLED;
523	kbd_queue(s, AUX_ACK, 1);
524	break;
525	case AUX_DISABLE_DEV:
526	s->mouse_status &= ~MOUSE_STATUS_ENABLED;
527	kbd_queue(s, AUX_ACK, 1);
528	break;
529	case AUX_SET_DEFAULT:
530	s->mouse_sample_rate = 100;
531	s->mouse_resolution = 2;
532	s->mouse_status = 0;
533	kbd_queue(s, AUX_ACK, 1);
534	break;
535	case AUX_RESET:
536	s->mouse_sample_rate = 100;
537	s->mouse_resolution = 2;
538	s->mouse_status = 0;
539	kbd_queue(s, AUX_ACK, 1);
540	kbd_queue(s, 0xaa, 1);
541	kbd_queue(s, s->mouse_type, 1);
542	break;
543	default:
544	break;
545	}
546	break;
547	case AUX_SET_SAMPLE:
548	s->mouse_sample_rate = val;
549	#if 0
550	/* detect IMPS/2 or IMEX */
551	switch(s->mouse_detect_state) {
552	default:
553	case 0:
554	if (val == 200)
555	s->mouse_detect_state = 1;
556	break;
557	case 1:
558	if (val == 100)
559	s->mouse_detect_state = 2;
560	else if (val == 200)
561	s->mouse_detect_state = 3;
562	else
563	s->mouse_detect_state = 0;
564	break;
565	case 2:
566	if (val == 80)
567	s->mouse_type = 3; /* IMPS/2 */
568	s->mouse_detect_state = 0;
569	break;
570	case 3:
571	if (val == 80)
572	s->mouse_type = 4; /* IMEX */
573	s->mouse_detect_state = 0;
574	break;
575	}
576	#endif
577	kbd_queue(s, AUX_ACK, 1);
578	s->mouse_write_cmd = -1;
579	break;
580	case AUX_SET_RES:
581	s->mouse_resolution = val;
582	kbd_queue(s, AUX_ACK, 1);
583	s->mouse_write_cmd = -1;
584	break;
585	}
586	}
587
b41a2cd1	588	void kbd_write_data(void *opaque, uint32_t addr, uint32_t val)
80cabfad	589	{
b41a2cd1	590	KBDState *s = opaque;
80cabfad FB	591
	592	#ifdef DEBUG_KBD
	593	printf("kbd: write data=0x%02x\n", val);
	594	#endif
	595
	596	switch(s->write_cmd) {
	597	case 0:
	598	kbd_write_keyboard(s, val);
	599	break;
	600	case KBD_CCMD_WRITE_MODE:
	601	s->mode = val;
	602	kbd_update_irq(s);
	603	break;
	604	case KBD_CCMD_WRITE_OBUF:
	605	kbd_queue(s, val, 0);
	606	break;
	607	case KBD_CCMD_WRITE_AUX_OBUF:
	608	kbd_queue(s, val, 1);
	609	break;
	610	case KBD_CCMD_WRITE_OUTPORT:
	611	#ifdef TARGET_I386
b41a2cd1	612	cpu_x86_set_a20(cpu_single_env, (val >> 1) & 1);
80cabfad FB	613	#endif
	614	if (!(val & 1)) {
	615	reset_requested = 1;
	616	cpu_interrupt(cpu_single_env, CPU_INTERRUPT_EXIT);
	617	}
	618	break;
	619	case KBD_CCMD_WRITE_MOUSE:
	620	kbd_write_mouse(s, val);
	621	break;
	622	default:
	623	break;
	624	}
	625	s->write_cmd = 0;
	626	}
	627
	628	void kbd_reset(KBDState *s)
	629	{
	630	KBDQueue *q;
	631	int i;
	632
	633	s->kbd_write_cmd = -1;
	634	s->mouse_write_cmd = -1;
	635	s->mode = KBD_MODE_KBD_INT \| KBD_MODE_MOUSE_INT;
	636	s->status = KBD_STAT_CMD \| KBD_STAT_UNLOCKED;
	637	for(i = 0; i < 2; i++) {
	638	q = &s->queues[i];
	639	q->rptr = 0;
	640	q->wptr = 0;
	641	q->count = 0;
	642	}
	643	}
	644
	645	void kbd_init(void)
	646	{
b41a2cd1 FB	647	KBDState *s = &kbd_state;
	648
	649	kbd_reset(s);
	650	register_ioport_read(0x60, 1, 1, kbd_read_data, s);
	651	register_ioport_write(0x60, 1, 1, kbd_write_data, s);
	652	register_ioport_read(0x64, 1, 1, kbd_read_status, s);
	653	register_ioport_write(0x64, 1, 1, kbd_write_command, s);
80cabfad	654	}