[mirror_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 aux[KBD_QUEUE_SIZE];
    uint8_t data[KBD_QUEUE_SIZE];
    int rptr, wptr, count;
} KBDQueue;

typedef struct KBDState {
    KBDQueue queue;
    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)
{
    KBDQueue *q = &s->queue;
    int irq12_level, irq1_level;

    irq1_level = 0;    
    irq12_level = 0;    
    s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
    if (q->count != 0) {
        s->status |= KBD_STAT_OBF;
        if (q->aux[q->rptr]) {
            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->queue;

#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->aux[q->wptr] = aux;
    q->data[q->wptr] = b;
    if (++q->wptr == KBD_QUEUE_SIZE)
        q->wptr = 0;
    q->count++;
    kbd_update_irq(s);
}

static void pc_kbd_put_keycode(void *opaque, int keycode)
{
    KBDState *s = opaque;
    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, aux;
    
    q = &s->queue;
    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 */
        index = q->rptr - 1;
        if (index < 0)
            index = KBD_QUEUE_SIZE - 1;
        val = q->data[index];
    } else {
        aux = q->aux[q->rptr];
        val = q->data[q->rptr];
        if (++q->rptr == KBD_QUEUE_SIZE)
            q->rptr = 0;
        q->count--;
        /* reading deasserts IRQ */
        if (aux)
            pic_set_irq(12, 0);
        else
            pic_set_irq(1, 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;
}

static void pc_kbd_mouse_event(void *opaque, 
                               int dx, int dy, int dz, int buttons_state)
{
    KBDState *s = opaque;

    /* 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;
    /* XXX: SDL sometimes generates nul events: we delete them */
    if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0 &&
        s->mouse_buttons == buttons_state)
	return;
    s->mouse_buttons = buttons_state;
    
    if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
        (s->queue.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;

    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;
    q = &s->queue;
    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);

    qemu_add_kbd_event_handler(pc_kbd_put_keycode, s);
    qemu_add_mouse_event_handler(pc_kbd_mouse_event, 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 {
6f51f6b5	114	uint8_t aux[KBD_QUEUE_SIZE];
80cabfad FB	115	uint8_t data[KBD_QUEUE_SIZE];
	116	int rptr, wptr, count;
	117	} KBDQueue;
	118
	119	typedef struct KBDState {
6f51f6b5	120	KBDQueue queue;
80cabfad FB	121	uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
	122	uint8_t status;
	123	uint8_t mode;
	124	/* keyboard state */
	125	int kbd_write_cmd;
	126	int scan_enabled;
	127	/* mouse state */
	128	int mouse_write_cmd;
	129	uint8_t mouse_status;
	130	uint8_t mouse_resolution;
	131	uint8_t mouse_sample_rate;
	132	uint8_t mouse_wrap;
	133	uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */
	134	uint8_t mouse_detect_state;
	135	int mouse_dx; /* current values, needed for 'poll' mode */
	136	int mouse_dy;
	137	int mouse_dz;
	138	uint8_t mouse_buttons;
	139	} KBDState;
	140
	141	KBDState kbd_state;
	142	int reset_requested;
	143
	144	/* update irq and KBD_STAT_[MOUSE_]OBF */
	145	/* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
	146	incorrect, but it avoids having to simulate exact delays */
	147	static void kbd_update_irq(KBDState *s)
	148	{
6f51f6b5	149	KBDQueue *q = &s->queue;
80cabfad FB	150	int irq12_level, irq1_level;
	151
	152	irq1_level = 0;
	153	irq12_level = 0;
	154	s->status &= ~(KBD_STAT_OBF \| KBD_STAT_MOUSE_OBF);
6f51f6b5	155	if (q->count != 0) {
80cabfad	156	s->status \|= KBD_STAT_OBF;
6f51f6b5	157	if (q->aux[q->rptr]) {
80cabfad FB	158	s->status \|= KBD_STAT_MOUSE_OBF;
	159	if (s->mode & KBD_MODE_MOUSE_INT)
	160	irq12_level = 1;
	161	} else {
	162	if ((s->mode & KBD_MODE_KBD_INT) &&
	163	!(s->mode & KBD_MODE_DISABLE_KBD))
	164	irq1_level = 1;
	165	}
	166	}
	167	pic_set_irq(1, irq1_level);
	168	pic_set_irq(12, irq12_level);
	169	}
	170
	171	static void kbd_queue(KBDState *s, int b, int aux)
	172	{
6f51f6b5	173	KBDQueue *q = &s->queue;
80cabfad FB	174
	175	#if defined(DEBUG_MOUSE) \|\| defined(DEBUG_KBD)
	176	if (aux)
	177	printf("mouse event: 0x%02x\n", b);
	178	#ifdef DEBUG_KBD
	179	else
	180	printf("kbd event: 0x%02x\n", b);
	181	#endif
	182	#endif
	183	if (q->count >= KBD_QUEUE_SIZE)
	184	return;
6f51f6b5	185	q->aux[q->wptr] = aux;
80cabfad FB	186	q->data[q->wptr] = b;
	187	if (++q->wptr == KBD_QUEUE_SIZE)
	188	q->wptr = 0;
	189	q->count++;
	190	kbd_update_irq(s);
	191	}
	192
63066f4f	193	static void pc_kbd_put_keycode(void *opaque, int keycode)
80cabfad	194	{
63066f4f	195	KBDState *s = opaque;
80cabfad FB	196	kbd_queue(s, keycode, 0);
	197	}
	198
b41a2cd1	199	static uint32_t kbd_read_status(void *opaque, uint32_t addr)
80cabfad	200	{
b41a2cd1	201	KBDState *s = opaque;
80cabfad FB	202	int val;
	203	val = s->status;
	204	#if defined(DEBUG_KBD)
	205	printf("kbd: read status=0x%02x\n", val);
	206	#endif
	207	return val;
	208	}
	209
b41a2cd1	210	static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val)
80cabfad	211	{
b41a2cd1	212	KBDState *s = opaque;
80cabfad FB	213
	214	#ifdef DEBUG_KBD
	215	printf("kbd: write cmd=0x%02x\n", val);
	216	#endif
	217	switch(val) {
	218	case KBD_CCMD_READ_MODE:
	219	kbd_queue(s, s->mode, 0);
	220	break;
	221	case KBD_CCMD_WRITE_MODE:
	222	case KBD_CCMD_WRITE_OBUF:
	223	case KBD_CCMD_WRITE_AUX_OBUF:
	224	case KBD_CCMD_WRITE_MOUSE:
	225	case KBD_CCMD_WRITE_OUTPORT:
	226	s->write_cmd = val;
	227	break;
	228	case KBD_CCMD_MOUSE_DISABLE:
	229	s->mode \|= KBD_MODE_DISABLE_MOUSE;
	230	break;
	231	case KBD_CCMD_MOUSE_ENABLE:
	232	s->mode &= ~KBD_MODE_DISABLE_MOUSE;
	233	break;
	234	case KBD_CCMD_TEST_MOUSE:
	235	kbd_queue(s, 0x00, 0);
	236	break;
	237	case KBD_CCMD_SELF_TEST:
	238	s->status \|= KBD_STAT_SELFTEST;
	239	kbd_queue(s, 0x55, 0);
	240	break;
	241	case KBD_CCMD_KBD_TEST:
	242	kbd_queue(s, 0x00, 0);
	243	break;
	244	case KBD_CCMD_KBD_DISABLE:
	245	s->mode \|= KBD_MODE_DISABLE_KBD;
	246	kbd_update_irq(s);
	247	break;
	248	case KBD_CCMD_KBD_ENABLE:
	249	s->mode &= ~KBD_MODE_DISABLE_KBD;
	250	kbd_update_irq(s);
	251	break;
	252	case KBD_CCMD_READ_INPORT:
	253	kbd_queue(s, 0x00, 0);
	254	break;
	255	case KBD_CCMD_READ_OUTPORT:
	256	/* XXX: check that */
	257	#ifdef TARGET_I386
	258	val = 0x01 \| (((cpu_single_env->a20_mask >> 20) & 1) << 1);
	259	#else
	260	val = 0x01;
	261	#endif
	262	if (s->status & KBD_STAT_OBF)
	263	val \|= 0x10;
	264	if (s->status & KBD_STAT_MOUSE_OBF)
	265	val \|= 0x20;
	266	kbd_queue(s, val, 0);
	267	break;
	268	#ifdef TARGET_I386
	269	case KBD_CCMD_ENABLE_A20:
b41a2cd1	270	cpu_x86_set_a20(cpu_single_env, 1);
80cabfad FB	271	break;
80cabfad FB	272	case KBD_CCMD_DISABLE_A20:
b41a2cd1	273	cpu_x86_set_a20(cpu_single_env, 0);
80cabfad FB	274	break;
	275	#endif
	276	case KBD_CCMD_RESET:
	277	reset_requested = 1;
	278	cpu_interrupt(cpu_single_env, CPU_INTERRUPT_EXIT);
	279	break;
	280	case 0xff:
	281	/* ignore that - I don't know what is its use */
	282	break;
	283	default:
	284	fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val);
	285	break;
	286	}
	287	}
	288
b41a2cd1	289	static uint32_t kbd_read_data(void *opaque, uint32_t addr)
80cabfad	290	{
b41a2cd1	291	KBDState *s = opaque;
80cabfad	292	KBDQueue *q;
6f51f6b5	293	int val, index, aux;
80cabfad	294
6f51f6b5	295	q = &s->queue;
80cabfad FB	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 */
80cabfad FB	300	index = q->rptr - 1;
	301	if (index < 0)
	302	index = KBD_QUEUE_SIZE - 1;
	303	val = q->data[index];
	304	} else {
6f51f6b5	305	aux = q->aux[q->rptr];
80cabfad FB	306	val = q->data[q->rptr];
	307	if (++q->rptr == KBD_QUEUE_SIZE)
	308	q->rptr = 0;
	309	q->count--;
	310	/* reading deasserts IRQ */
6f51f6b5	311	if (aux)
80cabfad	312	pic_set_irq(12, 0);
6f51f6b5 FB	313	else
6f51f6b5 FB	314	pic_set_irq(1, 0);
80cabfad FB	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
63066f4f FB	437	static void pc_kbd_mouse_event(void *opaque,
63066f4f FB	438	int dx, int dy, int dz, int buttons_state)
80cabfad	439	{
63066f4f	440	KBDState *s = opaque;
80cabfad FB	441
	442	/* check if deltas are recorded when disabled */
	443	if (!(s->mouse_status & MOUSE_STATUS_ENABLED))
	444	return;
	445
	446	s->mouse_dx += dx;
	447	s->mouse_dy -= dy;
	448	s->mouse_dz += dz;
92cb7d54 FB	449	/* XXX: SDL sometimes generates nul events: we delete them */
	450	if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0 &&
	451	s->mouse_buttons == buttons_state)
	452	return;
80cabfad FB	453	s->mouse_buttons = buttons_state;
	454
	455	if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
6f51f6b5	456	(s->queue.count < (KBD_QUEUE_SIZE - 16))) {
80cabfad FB	457	for(;;) {
	458	/* if not remote, send event. Multiple events are sent if
	459	too big deltas */
	460	kbd_mouse_send_packet(s);
	461	if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0)
	462	break;
	463	}
	464	}
	465	}
	466
	467	static void kbd_write_mouse(KBDState *s, int val)
	468	{
	469	#ifdef DEBUG_MOUSE
	470	printf("kbd: write mouse 0x%02x\n", val);
	471	#endif
	472	switch(s->mouse_write_cmd) {
	473	default:
	474	case -1:
	475	/* mouse command */
	476	if (s->mouse_wrap) {
	477	if (val == AUX_RESET_WRAP) {
	478	s->mouse_wrap = 0;
	479	kbd_queue(s, AUX_ACK, 1);
	480	return;
	481	} else if (val != AUX_RESET) {
	482	kbd_queue(s, val, 1);
	483	return;
	484	}
	485	}
	486	switch(val) {
	487	case AUX_SET_SCALE11:
	488	s->mouse_status &= ~MOUSE_STATUS_SCALE21;
	489	kbd_queue(s, AUX_ACK, 1);
	490	break;
	491	case AUX_SET_SCALE21:
	492	s->mouse_status \|= MOUSE_STATUS_SCALE21;
	493	kbd_queue(s, AUX_ACK, 1);
	494	break;
	495	case AUX_SET_STREAM:
	496	s->mouse_status &= ~MOUSE_STATUS_REMOTE;
	497	kbd_queue(s, AUX_ACK, 1);
	498	break;
	499	case AUX_SET_WRAP:
	500	s->mouse_wrap = 1;
	501	kbd_queue(s, AUX_ACK, 1);
	502	break;
	503	case AUX_SET_REMOTE:
	504	s->mouse_status \|= MOUSE_STATUS_REMOTE;
	505	kbd_queue(s, AUX_ACK, 1);
	506	break;
	507	case AUX_GET_TYPE:
	508	kbd_queue(s, AUX_ACK, 1);
	509	kbd_queue(s, s->mouse_type, 1);
	510	break;
	511	case AUX_SET_RES:
	512	case AUX_SET_SAMPLE:
	513	s->mouse_write_cmd = val;
	514	kbd_queue(s, AUX_ACK, 1);
	515	break;
	516	case AUX_GET_SCALE:
	517	kbd_queue(s, AUX_ACK, 1);
	518	kbd_queue(s, s->mouse_status, 1);
	519	kbd_queue(s, s->mouse_resolution, 1);
	520	kbd_queue(s, s->mouse_sample_rate, 1);
521	break;
522	case AUX_POLL:
523	kbd_queue(s, AUX_ACK, 1);
524	kbd_mouse_send_packet(s);
525	break;
526	case AUX_ENABLE_DEV:
527	s->mouse_status \|= MOUSE_STATUS_ENABLED;
528	kbd_queue(s, AUX_ACK, 1);
529	break;
530	case AUX_DISABLE_DEV:
531	s->mouse_status &= ~MOUSE_STATUS_ENABLED;
532	kbd_queue(s, AUX_ACK, 1);
533	break;
534	case AUX_SET_DEFAULT:
535	s->mouse_sample_rate = 100;
536	s->mouse_resolution = 2;
537	s->mouse_status = 0;
538	kbd_queue(s, AUX_ACK, 1);
539	break;
540	case AUX_RESET:
541	s->mouse_sample_rate = 100;
542	s->mouse_resolution = 2;
543	s->mouse_status = 0;
544	kbd_queue(s, AUX_ACK, 1);
545	kbd_queue(s, 0xaa, 1);
546	kbd_queue(s, s->mouse_type, 1);
547	break;
548	default:
549	break;
550	}
551	break;
552	case AUX_SET_SAMPLE:
553	s->mouse_sample_rate = val;
554	#if 0
555	/* detect IMPS/2 or IMEX */
556	switch(s->mouse_detect_state) {
557	default:
558	case 0:
559	if (val == 200)
560	s->mouse_detect_state = 1;
561	break;
562	case 1:
563	if (val == 100)
564	s->mouse_detect_state = 2;
565	else if (val == 200)
566	s->mouse_detect_state = 3;
567	else
568	s->mouse_detect_state = 0;
569	break;
570	case 2:
571	if (val == 80)
572	s->mouse_type = 3; /* IMPS/2 */
573	s->mouse_detect_state = 0;
574	break;
575	case 3:
576	if (val == 80)
577	s->mouse_type = 4; /* IMEX */
578	s->mouse_detect_state = 0;
579	break;
580	}
581	#endif
582	kbd_queue(s, AUX_ACK, 1);
583	s->mouse_write_cmd = -1;
584	break;
585	case AUX_SET_RES:
586	s->mouse_resolution = val;
587	kbd_queue(s, AUX_ACK, 1);
588	s->mouse_write_cmd = -1;
589	break;
590	}
591	}
592
b41a2cd1	593	void kbd_write_data(void *opaque, uint32_t addr, uint32_t val)
80cabfad	594	{
b41a2cd1	595	KBDState *s = opaque;
80cabfad FB	596
	597	#ifdef DEBUG_KBD
	598	printf("kbd: write data=0x%02x\n", val);
	599	#endif
	600
	601	switch(s->write_cmd) {
	602	case 0:
	603	kbd_write_keyboard(s, val);
	604	break;
	605	case KBD_CCMD_WRITE_MODE:
	606	s->mode = val;
	607	kbd_update_irq(s);
	608	break;
	609	case KBD_CCMD_WRITE_OBUF:
	610	kbd_queue(s, val, 0);
	611	break;
	612	case KBD_CCMD_WRITE_AUX_OBUF:
	613	kbd_queue(s, val, 1);
	614	break;
	615	case KBD_CCMD_WRITE_OUTPORT:
	616	#ifdef TARGET_I386
b41a2cd1	617	cpu_x86_set_a20(cpu_single_env, (val >> 1) & 1);
80cabfad FB	618	#endif
	619	if (!(val & 1)) {
	620	reset_requested = 1;
	621	cpu_interrupt(cpu_single_env, CPU_INTERRUPT_EXIT);
	622	}
	623	break;
	624	case KBD_CCMD_WRITE_MOUSE:
	625	kbd_write_mouse(s, val);
	626	break;
	627	default:
	628	break;
	629	}
	630	s->write_cmd = 0;
	631	}
	632
	633	void kbd_reset(KBDState *s)
	634	{
	635	KBDQueue *q;
80cabfad FB	636
	637	s->kbd_write_cmd = -1;
	638	s->mouse_write_cmd = -1;
	639	s->mode = KBD_MODE_KBD_INT \| KBD_MODE_MOUSE_INT;
	640	s->status = KBD_STAT_CMD \| KBD_STAT_UNLOCKED;
6f51f6b5 FB	641	q = &s->queue;
	642	q->rptr = 0;
	643	q->wptr = 0;
	644	q->count = 0;
80cabfad FB	645	}
	646
	647	void kbd_init(void)
	648	{
b41a2cd1 FB	649	KBDState *s = &kbd_state;
	650
	651	kbd_reset(s);
	652	register_ioport_read(0x60, 1, 1, kbd_read_data, s);
	653	register_ioport_write(0x60, 1, 1, kbd_write_data, s);
	654	register_ioport_read(0x64, 1, 1, kbd_read_status, s);
	655	register_ioport_write(0x64, 1, 1, kbd_write_command, s);
63066f4f FB	656
	657	qemu_add_kbd_event_handler(pc_kbd_put_keycode, s);
	658	qemu_add_mouse_event_handler(pc_kbd_mouse_event, s);
80cabfad	659	}