411 lines
11 KiB
C
411 lines
11 KiB
C
/*
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* QEMU ADB support
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*
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* Copyright (c) 2004 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "vl.h"
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/* ADB commands */
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#define ADB_BUSRESET 0x00
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#define ADB_FLUSH 0x01
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#define ADB_WRITEREG 0x08
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#define ADB_READREG 0x0c
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/* ADB device commands */
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#define ADB_CMD_SELF_TEST 0xff
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#define ADB_CMD_CHANGE_ID 0xfe
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#define ADB_CMD_CHANGE_ID_AND_ACT 0xfd
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#define ADB_CMD_CHANGE_ID_AND_ENABLE 0x00
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/* ADB default device IDs (upper 4 bits of ADB command byte) */
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#define ADB_DONGLE 1
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#define ADB_KEYBOARD 2
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#define ADB_MOUSE 3
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#define ADB_TABLET 4
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#define ADB_MODEM 5
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#define ADB_MISC 7
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/* error codes */
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#define ADB_RET_NOTPRESENT (-2)
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int adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf, int len)
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{
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ADBDevice *d;
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int devaddr, cmd, i;
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cmd = buf[0] & 0xf;
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if (cmd == ADB_BUSRESET) {
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for(i = 0; i < s->nb_devices; i++) {
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d = &s->devices[i];
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if (d->devreset) {
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d->devreset(d);
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}
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}
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return 0;
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}
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devaddr = buf[0] >> 4;
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for(i = 0; i < s->nb_devices; i++) {
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d = &s->devices[i];
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if (d->devaddr == devaddr) {
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return d->devreq(d, obuf, buf, len);
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}
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}
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return ADB_RET_NOTPRESENT;
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}
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/* XXX: move that to cuda ? */
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int adb_poll(ADBBusState *s, uint8_t *obuf)
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{
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ADBDevice *d;
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int olen, i;
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uint8_t buf[1];
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olen = 0;
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for(i = 0; i < s->nb_devices; i++) {
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if (s->poll_index >= s->nb_devices)
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s->poll_index = 0;
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d = &s->devices[s->poll_index];
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buf[0] = ADB_READREG | (d->devaddr << 4);
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olen = adb_request(s, obuf + 1, buf, 1);
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/* if there is data, we poll again the same device */
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if (olen > 0) {
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obuf[0] = buf[0];
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olen++;
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break;
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}
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s->poll_index++;
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}
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return olen;
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}
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ADBDevice *adb_register_device(ADBBusState *s, int devaddr,
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ADBDeviceRequest *devreq,
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ADBDeviceReset *devreset,
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void *opaque)
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{
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ADBDevice *d;
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if (s->nb_devices >= MAX_ADB_DEVICES)
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return NULL;
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d = &s->devices[s->nb_devices++];
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d->bus = s;
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d->devaddr = devaddr;
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d->devreq = devreq;
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d->devreset = devreset;
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d->opaque = opaque;
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return d;
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}
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/***************************************************************/
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/* Keyboard ADB device */
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typedef struct KBDState {
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uint8_t data[128];
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int rptr, wptr, count;
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} KBDState;
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static const uint8_t pc_to_adb_keycode[256] = {
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0, 53, 18, 19, 20, 21, 23, 22, 26, 28, 25, 29, 27, 24, 51, 48,
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12, 13, 14, 15, 17, 16, 32, 34, 31, 35, 33, 30, 36, 54, 0, 1,
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2, 3, 5, 4, 38, 40, 37, 41, 39, 50, 56, 42, 6, 7, 8, 9,
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11, 45, 46, 43, 47, 44,123, 67, 58, 49, 57,122,120, 99,118, 96,
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97, 98,100,101,109, 71,107, 89, 91, 92, 78, 86, 87, 88, 69, 83,
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84, 85, 82, 65, 0, 0, 10,103,111, 0, 0,110, 81, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 94, 0, 93, 0, 0, 0, 0, 0, 0,104,102, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 76,125, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0,105, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 75, 0, 0,124, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0,115, 62,116, 0, 59, 0, 60, 0,119,
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61,121,114,117, 0, 0, 0, 0, 0, 0, 0, 55,126, 0,127, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 95, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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};
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static void adb_kbd_put_keycode(void *opaque, int keycode)
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{
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ADBDevice *d = opaque;
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KBDState *s = d->opaque;
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if (s->count < sizeof(s->data)) {
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s->data[s->wptr] = keycode;
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if (++s->wptr == sizeof(s->data))
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s->wptr = 0;
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s->count++;
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}
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}
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static int adb_kbd_poll(ADBDevice *d, uint8_t *obuf)
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{
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static int ext_keycode;
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KBDState *s = d->opaque;
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int adb_keycode, keycode;
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int olen;
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olen = 0;
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for(;;) {
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if (s->count == 0)
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break;
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keycode = s->data[s->rptr];
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if (++s->rptr == sizeof(s->data))
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s->rptr = 0;
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s->count--;
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if (keycode == 0xe0) {
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ext_keycode = 1;
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} else {
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if (ext_keycode)
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adb_keycode = pc_to_adb_keycode[keycode | 0x80];
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else
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adb_keycode = pc_to_adb_keycode[keycode & 0x7f];
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obuf[0] = adb_keycode | (keycode & 0x80);
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/* NOTE: could put a second keycode if needed */
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obuf[1] = 0xff;
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olen = 2;
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ext_keycode = 0;
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break;
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}
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}
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return olen;
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}
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static int adb_kbd_request(ADBDevice *d, uint8_t *obuf,
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const uint8_t *buf, int len)
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{
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KBDState *s = d->opaque;
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int cmd, reg, olen;
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if ((buf[0] & 0x0f) == ADB_FLUSH) {
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/* flush keyboard fifo */
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s->wptr = s->rptr = s->count = 0;
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return 0;
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}
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cmd = buf[0] & 0xc;
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reg = buf[0] & 0x3;
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olen = 0;
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switch(cmd) {
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case ADB_WRITEREG:
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switch(reg) {
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case 2:
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/* LED status */
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break;
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case 3:
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switch(buf[2]) {
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case ADB_CMD_SELF_TEST:
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break;
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case ADB_CMD_CHANGE_ID:
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case ADB_CMD_CHANGE_ID_AND_ACT:
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case ADB_CMD_CHANGE_ID_AND_ENABLE:
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d->devaddr = buf[1] & 0xf;
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break;
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default:
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/* XXX: check this */
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d->devaddr = buf[1] & 0xf;
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d->handler = buf[2];
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break;
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}
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}
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break;
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case ADB_READREG:
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switch(reg) {
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case 0:
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olen = adb_kbd_poll(d, obuf);
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break;
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case 1:
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break;
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case 2:
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obuf[0] = 0x00; /* XXX: check this */
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obuf[1] = 0x07; /* led status */
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olen = 2;
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break;
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case 3:
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obuf[0] = d->handler;
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obuf[1] = d->devaddr;
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olen = 2;
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break;
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}
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break;
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}
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return olen;
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}
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static int adb_kbd_reset(ADBDevice *d)
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{
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KBDState *s = d->opaque;
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d->handler = 1;
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d->devaddr = ADB_KEYBOARD;
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memset(s, 0, sizeof(KBDState));
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return 0;
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}
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void adb_kbd_init(ADBBusState *bus)
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{
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ADBDevice *d;
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KBDState *s;
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s = qemu_mallocz(sizeof(KBDState));
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d = adb_register_device(bus, ADB_KEYBOARD, adb_kbd_request,
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adb_kbd_reset, s);
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adb_kbd_reset(d);
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qemu_add_kbd_event_handler(adb_kbd_put_keycode, d);
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}
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/***************************************************************/
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/* Mouse ADB device */
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typedef struct MouseState {
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int buttons_state, last_buttons_state;
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int dx, dy, dz;
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} MouseState;
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static void adb_mouse_event(void *opaque,
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int dx1, int dy1, int dz1, int buttons_state)
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{
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ADBDevice *d = opaque;
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MouseState *s = d->opaque;
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s->dx += dx1;
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s->dy += dy1;
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s->dz += dz1;
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s->buttons_state = buttons_state;
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}
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static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf)
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{
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MouseState *s = d->opaque;
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int dx, dy;
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if (s->last_buttons_state == s->buttons_state &&
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s->dx == 0 && s->dy == 0)
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return 0;
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dx = s->dx;
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if (dx < -63)
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dx = -63;
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else if (dx > 63)
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dx = 63;
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dy = s->dy;
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if (dy < -63)
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dy = -63;
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else if (dy > 63)
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dy = 63;
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s->dx -= dx;
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s->dy -= dy;
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s->last_buttons_state = s->buttons_state;
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dx &= 0x7f;
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dy &= 0x7f;
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if (!(s->buttons_state & MOUSE_EVENT_LBUTTON))
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dy |= 0x80;
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if (!(s->buttons_state & MOUSE_EVENT_RBUTTON))
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dx |= 0x80;
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obuf[0] = dy;
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obuf[1] = dx;
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return 2;
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}
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static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
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const uint8_t *buf, int len)
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{
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MouseState *s = d->opaque;
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int cmd, reg, olen;
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if ((buf[0] & 0x0f) == ADB_FLUSH) {
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/* flush mouse fifo */
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s->buttons_state = s->last_buttons_state;
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s->dx = 0;
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s->dy = 0;
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s->dz = 0;
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return 0;
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}
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cmd = buf[0] & 0xc;
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reg = buf[0] & 0x3;
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olen = 0;
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switch(cmd) {
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case ADB_WRITEREG:
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switch(reg) {
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case 2:
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break;
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case 3:
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switch(buf[2]) {
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case ADB_CMD_SELF_TEST:
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break;
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case ADB_CMD_CHANGE_ID:
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case ADB_CMD_CHANGE_ID_AND_ACT:
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case ADB_CMD_CHANGE_ID_AND_ENABLE:
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d->devaddr = buf[1] & 0xf;
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break;
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default:
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/* XXX: check this */
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d->devaddr = buf[1] & 0xf;
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break;
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}
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}
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break;
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case ADB_READREG:
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switch(reg) {
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case 0:
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olen = adb_mouse_poll(d, obuf);
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break;
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case 1:
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break;
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case 3:
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obuf[0] = d->handler;
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obuf[1] = d->devaddr;
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olen = 2;
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break;
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}
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break;
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}
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return olen;
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}
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static int adb_mouse_reset(ADBDevice *d)
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{
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MouseState *s = d->opaque;
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d->handler = 2;
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d->devaddr = ADB_MOUSE;
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memset(s, 0, sizeof(MouseState));
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return 0;
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}
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void adb_mouse_init(ADBBusState *bus)
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{
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ADBDevice *d;
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MouseState *s;
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s = qemu_mallocz(sizeof(MouseState));
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d = adb_register_device(bus, ADB_MOUSE, adb_mouse_request,
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adb_mouse_reset, s);
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adb_mouse_reset(d);
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qemu_add_mouse_event_handler(adb_mouse_event, d, 0, "QEMU ADB Mouse");
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}
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