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-rw-r--r--hw/adb.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/hw/adb.c b/hw/adb.c
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+++ b/hw/adb.c
@@ -0,0 +1,410 @@
+/*
+ * 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
+
+/* 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;
+ 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 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 = qemu_mallocz(sizeof(KBDState));
+ d = adb_register_device(bus, ADB_KEYBOARD, adb_kbd_request,
+ adb_kbd_reset, s);
+ adb_kbd_reset(d);
+ qemu_add_kbd_event_handler(adb_kbd_put_keycode, d);
+}
+
+/***************************************************************/
+/* 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:
+ 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;
+ }
+ 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;
+}
+
+void adb_mouse_init(ADBBusState *bus)
+{
+ ADBDevice *d;
+ MouseState *s;
+
+ s = qemu_mallocz(sizeof(MouseState));
+ d = adb_register_device(bus, ADB_MOUSE, adb_mouse_request,
+ adb_mouse_reset, s);
+ adb_mouse_reset(d);
+ qemu_add_mouse_event_handler(adb_mouse_event, d, 0);
+}
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