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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 "hw.h"
#include "adb.h"
#include "console.h"
/* debug ADB */
//#define DEBUG_ADB
#ifdef DEBUG_ADB
#define ADB_DPRINTF(fmt, ...) \
do { printf("ADB: " fmt , ## __VA_ARGS__); } while (0)
#else
#define ADB_DPRINTF(fmt, ...)
#endif
/* 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
/* error codes */
#define ADB_RET_NOTPRESENT (-2)
int adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf, int len)
{
ADBDevice *d;
int devaddr, cmd, i;
cmd = buf[0] & 0xf;
if (cmd == ADB_BUSRESET) {
for(i = 0; i < s->nb_devices; i++) {
d = &s->devices[i];
if (d->devreset) {
d->devreset(d);
}
}
return 0;
}
devaddr = buf[0] >> 4;
for(i = 0; i < s->nb_devices; i++) {
d = &s->devices[i];
if (d->devaddr == devaddr) {
return d->devreq(d, obuf, buf, len);
}
}
return ADB_RET_NOTPRESENT;
}
/* XXX: move that to cuda ? */
int adb_poll(ADBBusState *s, uint8_t *obuf)
{
ADBDevice *d;
int olen, i;
uint8_t buf[1];
olen = 0;
for(i = 0; i < s->nb_devices; i++) {
if (s->poll_index >= s->nb_devices)
s->poll_index = 0;
d = &s->devices[s->poll_index];
buf[0] = ADB_READREG | (d->devaddr << 4);
olen = adb_request(s, obuf + 1, buf, 1);
/* if there is data, we poll again the same device */
if (olen > 0) {
obuf[0] = buf[0];
olen++;
break;
}
s->poll_index++;
}
return olen;
}
ADBDevice *adb_register_device(ADBBusState *s, int devaddr,
ADBDeviceRequest *devreq,
ADBDeviceReset *devreset,
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->devreq = devreq;
d->devreset = devreset;
d->opaque = opaque;
qemu_register_reset((QEMUResetHandler *)devreset, d);
return d;
}
/***************************************************************/
/* Keyboard ADB device */
typedef struct KBDState {
uint8_t data[128];
int rptr, wptr, count;
} KBDState;
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, 0,110, 81, 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, 76,125, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,105, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 75, 0, 0,124, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0,115, 62,116, 0, 59, 0, 60, 0,119,
61,121,114,117, 0, 0, 0, 0, 0, 0, 0, 55,126, 0,127, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 95, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
static void adb_kbd_put_keycode(void *opaque, int keycode)
{
ADBDevice *d = opaque;
KBDState *s = d->opaque;
if (s->count < sizeof(s->data)) {
s->data[s->wptr] = keycode;
if (++s->wptr == sizeof(s->data))
s->wptr = 0;
s->count++;
}
}
static int adb_kbd_poll(ADBDevice *d, uint8_t *obuf)
{
static int ext_keycode;
KBDState *s = d->opaque;
int adb_keycode, keycode;
int olen;
olen = 0;
for(;;) {
if (s->count == 0)
break;
keycode = s->data[s->rptr];
if (++s->rptr == sizeof(s->data))
s->rptr = 0;
s->count--;
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];
obuf[0] = adb_keycode | (keycode & 0x80);
/* NOTE: could put a second keycode if needed */
obuf[1] = 0xff;
olen = 2;
ext_keycode = 0;
break;
}
}
return olen;
}
static int adb_kbd_request(ADBDevice *d, uint8_t *obuf,
const uint8_t *buf, int len)
{
KBDState *s = d->opaque;
int cmd, reg, olen;
if ((buf[0] & 0x0f) == ADB_FLUSH) {
/* flush keyboard fifo */
s->wptr = s->rptr = s->count = 0;
return 0;
}
cmd = buf[0] & 0xc;
reg = buf[0] & 0x3;
olen = 0;
switch(cmd) {
case ADB_WRITEREG:
switch(reg) {
case 2:
/* LED status */
break;
case 3:
switch(buf[2]) {
case ADB_CMD_SELF_TEST:
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;
break;
default:
/* XXX: check this */
d->devaddr = buf[1] & 0xf;
d->handler = buf[2];
break;
}
}
break;
case ADB_READREG:
switch(reg) {
case 0:
olen = adb_kbd_poll(d, obuf);
break;
case 1:
break;
case 2:
obuf[0] = 0x00; /* XXX: check this */
obuf[1] = 0x07; /* led status */
olen = 2;
break;
case 3:
obuf[0] = d->handler;
obuf[1] = d->devaddr;
olen = 2;
break;
}
break;
}
return olen;
}
static const VMStateDescription vmstate_adb_kbd = {
.name = "adb_kbd",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_BUFFER(data, KBDState),
VMSTATE_INT32(rptr, KBDState),
VMSTATE_INT32(wptr, KBDState),
VMSTATE_INT32(count, KBDState),
VMSTATE_END_OF_LIST()
}
};
static int adb_kbd_reset(ADBDevice *d)
{
KBDState *s = d->opaque;
d->handler = 1;
d->devaddr = ADB_KEYBOARD;
memset(s, 0, sizeof(KBDState));
return 0;
}
void adb_kbd_init(ADBBusState *bus)
{
ADBDevice *d;
KBDState *s;
s = g_malloc0(sizeof(KBDState));
d = adb_register_device(bus, ADB_KEYBOARD, adb_kbd_request,
adb_kbd_reset, s);
qemu_add_kbd_event_handler(adb_kbd_put_keycode, d);
vmstate_register(NULL, -1, &vmstate_adb_kbd, s);
}
/***************************************************************/
/* Mouse ADB device */
typedef struct MouseState {
int buttons_state, last_buttons_state;
int dx, dy, dz;
} MouseState;
static void adb_mouse_event(void *opaque,
int dx1, int dy1, int dz1, int buttons_state)
{
ADBDevice *d = opaque;
MouseState *s = d->opaque;
s->dx += dx1;
s->dy += dy1;
s->dz += dz1;
s->buttons_state = buttons_state;
}
static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf)
{
MouseState *s = d->opaque;
int dx, dy;
if (s->last_buttons_state == s->buttons_state &&
s->dx == 0 && s->dy == 0)
return 0;
dx = s->dx;
if (dx < -63)
dx = -63;
else if (dx > 63)
dx = 63;
dy = s->dy;
if (dy < -63)
dy = -63;
else if (dy > 63)
dy = 63;
s->dx -= dx;
s->dy -= dy;
s->last_buttons_state = s->buttons_state;
dx &= 0x7f;
dy &= 0x7f;
if (!(s->buttons_state & MOUSE_EVENT_LBUTTON))
dy |= 0x80;
if (!(s->buttons_state & MOUSE_EVENT_RBUTTON))
dx |= 0x80;
obuf[0] = dy;
obuf[1] = dx;
return 2;
}
static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
const uint8_t *buf, int len)
{
MouseState *s = d->opaque;
int cmd, reg, olen;
if ((buf[0] & 0x0f) == ADB_FLUSH) {
/* flush mouse fifo */
s->buttons_state = s->last_buttons_state;
s->dx = 0;
s->dy = 0;
s->dz = 0;
return 0;
}
cmd = buf[0] & 0xc;
reg = buf[0] & 0x3;
olen = 0;
switch(cmd) {
case ADB_WRITEREG:
ADB_DPRINTF("write reg %d val 0x%2.2x\n", reg, buf[1]);
switch(reg) {
case 2:
break;
case 3:
switch(buf[2]) {
case ADB_CMD_SELF_TEST:
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;
break;
default:
/* XXX: check this */
d->devaddr = buf[1] & 0xf;
break;
}
}
break;
case ADB_READREG:
switch(reg) {
case 0:
olen = adb_mouse_poll(d, obuf);
break;
case 1:
break;
case 3:
obuf[0] = d->handler;
obuf[1] = d->devaddr;
olen = 2;
break;
}
ADB_DPRINTF("read reg %d obuf[0] 0x%2.2x obuf[1] 0x%2.2x\n", reg,
obuf[0], obuf[1]);
break;
}
return olen;
}
static int adb_mouse_reset(ADBDevice *d)
{
MouseState *s = d->opaque;
d->handler = 2;
d->devaddr = ADB_MOUSE;
memset(s, 0, sizeof(MouseState));
return 0;
}
static const VMStateDescription vmstate_adb_mouse = {
.name = "adb_mouse",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32(buttons_state, MouseState),
VMSTATE_INT32(last_buttons_state, MouseState),
VMSTATE_INT32(dx, MouseState),
VMSTATE_INT32(dy, MouseState),
VMSTATE_INT32(dz, MouseState),
VMSTATE_END_OF_LIST()
}
};
void adb_mouse_init(ADBBusState *bus)
{
ADBDevice *d;
MouseState *s;
s = g_malloc0(sizeof(MouseState));
d = adb_register_device(bus, ADB_MOUSE, adb_mouse_request,
adb_mouse_reset, s);
qemu_add_mouse_event_handler(adb_mouse_event, d, 0, "QEMU ADB Mouse");
vmstate_register(NULL, -1, &vmstate_adb_mouse, s);
}
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