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qemu/hw/adb.c

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/*
* QEMU ADB support
*
* Copyright (c) 2004 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"
/* ADB commands */
#define ADB_BUSRESET 0x00
#define ADB_FLUSH 0x01
#define ADB_WRITEREG 0x08
#define ADB_READREG 0x0c
/* ADB device commands */
#define ADB_CMD_SELF_TEST 0xff
#define ADB_CMD_CHANGE_ID 0xfe
#define ADB_CMD_CHANGE_ID_AND_ACT 0xfd
#define ADB_CMD_CHANGE_ID_AND_ENABLE 0x00
/* ADB default device IDs (upper 4 bits of ADB command byte) */
#define ADB_DONGLE 1
#define ADB_KEYBOARD 2
#define ADB_MOUSE 3
#define ADB_TABLET 4
#define ADB_MODEM 5
#define ADB_MISC 7
#define ADB_RET_OK 0
#define ADB_RET_INUSE 1
#define ADB_RET_NOTPRESENT 2
#define ADB_RET_TIMEOUT 3
#define ADB_RET_UNEXPECTED_RESULT 4
#define ADB_RET_REQUEST_ERROR 5
#define ADB_RET_BUS_ERROR 6
static void adb_send_packet1(ADBBusState *s, uint8_t reply)
{
adb_send_packet(s, &reply, 1);
}
void adb_receive_packet(ADBBusState *s, const uint8_t *buf, int len)
{
ADBDevice *d;
int devaddr, cmd, i;
uint8_t obuf[4];
cmd = buf[1] & 0xf;
devaddr = buf[1] >> 4;
if (buf[1] == ADB_BUSRESET) {
obuf[0] = 0x00;
obuf[1] = 0x00;
adb_send_packet(s, obuf, 2);
return;
}
if (cmd == ADB_FLUSH) {
obuf[0] = 0x00;
obuf[1] = 0x00;
adb_send_packet(s, obuf, 2);
return;
}
for(i = 0; i < s->nb_devices; i++) {
d = &s->devices[i];
if (d->devaddr == devaddr) {
d->receive_packet(d, buf, len);
return;
}
}
adb_send_packet1(s, ADB_RET_NOTPRESENT);
}
ADBDevice *adb_register_device(ADBBusState *s, int devaddr,
ADBDeviceReceivePacket *receive_packet,
void *opaque)
{
ADBDevice *d;
if (s->nb_devices >= MAX_ADB_DEVICES)
return NULL;
d = &s->devices[s->nb_devices++];
d->bus = s;
d->devaddr = devaddr;
d->receive_packet = receive_packet;
d->opaque = opaque;
return d;
}
/***************************************************************/
/* Keyboard ADB device */
static const uint8_t pc_to_adb_keycode[256] = {
0, 53, 18, 19, 20, 21, 23, 22, 26, 28, 25, 29, 27, 24, 51, 48,
12, 13, 14, 15, 17, 16, 32, 34, 31, 35, 33, 30, 36, 54, 0, 1,
2, 3, 5, 4, 38, 40, 37, 41, 39, 50, 56, 42, 6, 7, 8, 9,
11, 45, 46, 43, 47, 44,123, 67, 58, 49, 57,122,120, 99,118, 96,
97, 98,100,101,109, 71,107, 89, 91, 92, 78, 86, 87, 88, 69, 83,
84, 85, 82, 65, 0, 0, 10,103,111, 0, 0, 0, 0, 0, 0, 0,
76,125, 75,105,124,110,115, 62,116, 59, 60,119, 61,121,114,117,
0, 0, 0, 0,127, 81, 0,113, 0, 0, 0, 0, 95, 55, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 94, 0, 93, 0, 0, 0, 0, 0, 0,104,102,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
static void adb_kbd_put_keycode(void *opaque, int keycode)
{
static int ext_keycode;
ADBDevice *d = opaque;
uint8_t buf[4];
int adb_keycode;
if (keycode == 0xe0) {
ext_keycode = 1;
} else {
if (ext_keycode)
adb_keycode = pc_to_adb_keycode[keycode | 0x80];
else
adb_keycode = pc_to_adb_keycode[keycode & 0x7f];
buf[0] = 0x40;
buf[1] = (d->devaddr << 4) | 0x0c;
buf[2] = adb_keycode | (keycode & 0x80);
buf[3] = 0xff;
adb_send_packet(d->bus, buf, 4);
ext_keycode = 0;
}
}
static void adb_kbd_receive_packet(ADBDevice *d, const uint8_t *buf, int len)
{
int cmd, reg;
uint8_t obuf[4];
cmd = buf[0] & 0xc;
reg = buf[0] & 0x3;
switch(cmd) {
case ADB_WRITEREG:
switch(reg) {
case 2:
/* LED status */
adb_send_packet1(d->bus, ADB_RET_OK);
break;
case 3:
switch(buf[2]) {
case ADB_CMD_SELF_TEST:
adb_send_packet1(d->bus, ADB_RET_OK);
break;
case ADB_CMD_CHANGE_ID:
case ADB_CMD_CHANGE_ID_AND_ACT:
case ADB_CMD_CHANGE_ID_AND_ENABLE:
d->devaddr = buf[1] & 0xf;
adb_send_packet1(d->bus, ADB_RET_OK);
break;
default:
/* XXX: check this */
d->devaddr = buf[1] & 0xf;
d->handler = buf[2];
adb_send_packet1(d->bus, ADB_RET_OK);
break;
}
}
break;
case ADB_READREG:
switch(reg) {
case 1:
adb_send_packet1(d->bus, ADB_RET_OK);
break;
case 2:
obuf[0] = ADB_RET_OK;
obuf[1] = 0x00; /* XXX: check this */
obuf[2] = 0x07; /* led status */
adb_send_packet(d->bus, obuf, 3);
break;
case 3:
obuf[0] = ADB_RET_OK;
obuf[1] = d->handler;
obuf[2] = d->devaddr;
adb_send_packet(d->bus, obuf, 3);
break;
}
break;
}
}
void adb_kbd_init(ADBBusState *bus)
{
ADBDevice *d;
d = adb_register_device(bus, ADB_KEYBOARD, adb_kbd_receive_packet, NULL);
qemu_add_kbd_event_handler(adb_kbd_put_keycode, d);
}
/***************************************************************/
/* Mouse ADB device */
static void adb_mouse_event(void *opaque,
int dx1, int dy1, int dz1, int buttons_state)
{
ADBDevice *d = opaque;
uint8_t buf[4];
int dx, dy;
dx = dx1;
if (dx < -63)
dx = -63;
else if (dx > 63)
dx = 63;
dy = dy1;
if (dy < -63)
dy = -63;
else if (dy > 63)
dy = 63;
dx &= 0x7f;
dy &= 0x7f;
if (buttons_state & MOUSE_EVENT_LBUTTON)
dy |= 0x80;
if (buttons_state & MOUSE_EVENT_RBUTTON)
dx |= 0x80;
buf[0] = 0x40;
buf[1] = (d->devaddr << 4) | 0x0c;
buf[2] = dy;
buf[3] = dx;
adb_send_packet(d->bus, buf, 4);
}
static void adb_mouse_receive_packet(ADBDevice *d, const uint8_t *buf, int len)
{
int cmd, reg;
uint8_t obuf[4];
cmd = buf[0] & 0xc;
reg = buf[0] & 0x3;
switch(cmd) {
case ADB_WRITEREG:
switch(reg) {
case 2:
adb_send_packet1(d->bus, ADB_RET_OK);
break;
case 3:
switch(buf[2]) {
case ADB_CMD_SELF_TEST:
adb_send_packet1(d->bus, ADB_RET_OK);
break;
case ADB_CMD_CHANGE_ID:
case ADB_CMD_CHANGE_ID_AND_ACT:
case ADB_CMD_CHANGE_ID_AND_ENABLE:
d->devaddr = buf[1] & 0xf;
adb_send_packet1(d->bus, ADB_RET_OK);
break;
default:
/* XXX: check this */
d->devaddr = buf[1] & 0xf;
adb_send_packet1(d->bus, ADB_RET_OK);
break;
}
}
break;
case ADB_READREG:
switch(reg) {
case 1:
adb_send_packet1(d->bus, ADB_RET_OK);
break;
case 3:
obuf[0] = ADB_RET_OK;
obuf[1] = d->handler;
obuf[2] = d->devaddr;
adb_send_packet(d->bus, obuf, 3);
break;
}
break;
}
}
void adb_mouse_init(ADBBusState *bus)
{
ADBDevice *d;
d = adb_register_device(bus, ADB_MOUSE, adb_mouse_receive_packet, NULL);
qemu_add_mouse_event_handler(adb_mouse_event, d);
}
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