hw/input/adb-mouse.c

   1 /*
   2  * QEMU ADB mouse support
   3  *
   4  * Copyright (c) 2004 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  */
  24
  25 #include "qemu/osdep.h"
  26 #include "ui/console.h"
  27 #include "hw/input/adb.h"
  28 #include "migration/vmstate.h"
  29 #include "qemu/module.h"
  30 #include "adb-internal.h"
  31 #include "trace.h"
  32 #include "qom/object.h"
  33
  34 typedef struct ADBMouseClass ADBMouseClass;
  35 typedef struct MouseState MouseState;
  36 DECLARE_OBJ_CHECKERS(MouseState, ADBMouseClass,
  37                      ADB_MOUSE, TYPE_ADB_MOUSE)
  38
  39 struct MouseState {
  40     /*< public >*/
  41     ADBDevice parent_obj;
  42     /*< private >*/
  43
  44     int buttons_state, last_buttons_state;
  45     int dx, dy, dz;
  46 };
  47
  48
  49 struct ADBMouseClass {
  50     /*< public >*/
  51     ADBDeviceClass parent_class;
  52     /*< private >*/
  53
  54     DeviceRealize parent_realize;
  55 };
  56
  57 static void adb_mouse_event(void *opaque,
  58                             int dx1, int dy1, int dz1, int buttons_state)
  59 {
  60     MouseState *s = opaque;
  61
  62     s->dx += dx1;
  63     s->dy += dy1;
  64     s->dz += dz1;
  65     s->buttons_state = buttons_state;
  66 }
  67
  68
  69 static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf)
  70 {
  71     MouseState *s = ADB_MOUSE(d);
  72     int dx, dy;
  73
  74     if (s->last_buttons_state == s->buttons_state &&
  75         s->dx == 0 && s->dy == 0) {
  76         return 0;
  77     }
  78
  79     dx = s->dx;
  80     if (dx < -63) {
  81         dx = -63;
  82     } else if (dx > 63) {
  83         dx = 63;
  84     }
  85
  86     dy = s->dy;
  87     if (dy < -63) {
  88         dy = -63;
  89     } else if (dy > 63) {
  90         dy = 63;
  91     }
  92
  93     s->dx -= dx;
  94     s->dy -= dy;
  95     s->last_buttons_state = s->buttons_state;
  96
  97     dx &= 0x7f;
  98     dy &= 0x7f;
  99
 100     if (!(s->buttons_state & MOUSE_EVENT_LBUTTON)) {
 101         dy |= 0x80;
 102     }
 103     if (!(s->buttons_state & MOUSE_EVENT_RBUTTON)) {
 104         dx |= 0x80;
 105     }
 106
 107     obuf[0] = dy;
 108     obuf[1] = dx;
 109     return 2;
 110 }
 111
 112 static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
 113                              const uint8_t *buf, int len)
 114 {
 115     MouseState *s = ADB_MOUSE(d);
 116     int cmd, reg, olen;
 117
 118     if ((buf[0] & 0x0f) == ADB_FLUSH) {
 119         /* flush mouse fifo */
 120         s->buttons_state = s->last_buttons_state;
 121         s->dx = 0;
 122         s->dy = 0;
 123         s->dz = 0;
 124         trace_adb_device_mouse_flush();
 125         return 0;
 126     }
 127
 128     cmd = buf[0] & 0xc;
 129     reg = buf[0] & 0x3;
 130     olen = 0;
 131     switch (cmd) {
 132     case ADB_WRITEREG:
 133         trace_adb_device_mouse_writereg(reg, buf[1]);
 134         switch (reg) {
 135         case 2:
 136             break;
 137         case 3:
 138             /*
 139              * MacOS 9 has a bug in its ADB driver whereby after configuring
 140              * the ADB bus devices it sends another write of invalid length
 141              * to reg 3. Make sure we ignore it to prevent an address clash
 142              * with the previous device.
 143              */
 144             if (len != 3) {
 145                 return 0;
 146             }
 147
 148             switch (buf[2]) {
 149             case ADB_CMD_SELF_TEST:
 150                 break;
 151             case ADB_CMD_CHANGE_ID:
 152             case ADB_CMD_CHANGE_ID_AND_ACT:
 153             case ADB_CMD_CHANGE_ID_AND_ENABLE:
 154                 d->devaddr = buf[1] & 0xf;
 155                 trace_adb_device_mouse_request_change_addr(d->devaddr);
 156                 break;
 157             default:
 158                 d->devaddr = buf[1] & 0xf;
 159                 /*
 160                  * we support handlers:
 161                  * 0x01: Classic Apple Mouse Protocol / 100 cpi operations
 162                  * 0x02: Classic Apple Mouse Protocol / 200 cpi operations
 163                  * we don't support handlers (at least):
 164                  * 0x03: Mouse systems A3 trackball
 165                  * 0x04: Extended Apple Mouse Protocol
 166                  * 0x2f: Microspeed mouse
 167                  * 0x42: Macally
 168                  * 0x5f: Microspeed mouse
 169                  * 0x66: Microspeed mouse
 170                  */
 171                 if (buf[2] == 1 || buf[2] == 2) {
 172                     d->handler = buf[2];
 173                 }
 174
 175                 trace_adb_device_mouse_request_change_addr_and_handler(
 176                     d->devaddr, d->handler);
 177                 break;
 178             }
 179         }
 180         break;
 181     case ADB_READREG:
 182         switch (reg) {
 183         case 0:
 184             olen = adb_mouse_poll(d, obuf);
 185             break;
 186         case 1:
 187             break;
 188         case 3:
 189             obuf[0] = d->devaddr;
 190             obuf[1] = d->handler;
 191             olen = 2;
 192             break;
 193         }
 194         trace_adb_device_mouse_readreg(reg, obuf[0], obuf[1]);
 195         break;
 196     }
 197     return olen;
 198 }
 199
 200 static bool adb_mouse_has_data(ADBDevice *d)
 201 {
 202     MouseState *s = ADB_MOUSE(d);
 203
 204     return !(s->last_buttons_state == s->buttons_state &&
 205              s->dx == 0 && s->dy == 0);
 206 }
 207
 208 static void adb_mouse_reset(DeviceState *dev)
 209 {
 210     ADBDevice *d = ADB_DEVICE(dev);
 211     MouseState *s = ADB_MOUSE(dev);
 212
 213     d->handler = 2;
 214     d->devaddr = ADB_DEVID_MOUSE;
 215     s->last_buttons_state = s->buttons_state = 0;
 216     s->dx = s->dy = s->dz = 0;
 217 }
 218
 219 static const VMStateDescription vmstate_adb_mouse = {
 220     .name = "adb_mouse",
 221     .version_id = 2,
 222     .minimum_version_id = 2,
 223     .fields = (VMStateField[]) {
 224         VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device,
 225                        ADBDevice),
 226         VMSTATE_INT32(buttons_state, MouseState),
 227         VMSTATE_INT32(last_buttons_state, MouseState),
 228         VMSTATE_INT32(dx, MouseState),
 229         VMSTATE_INT32(dy, MouseState),
 230         VMSTATE_INT32(dz, MouseState),
 231         VMSTATE_END_OF_LIST()
 232     }
 233 };
 234
 235 static void adb_mouse_realizefn(DeviceState *dev, Error **errp)
 236 {
 237     MouseState *s = ADB_MOUSE(dev);
 238     ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev);
 239
 240     amc->parent_realize(dev, errp);
 241
 242     qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse");
 243 }
 244
 245 static void adb_mouse_initfn(Object *obj)
 246 {
 247     ADBDevice *d = ADB_DEVICE(obj);
 248
 249     d->devaddr = ADB_DEVID_MOUSE;
 250 }
 251
 252 static void adb_mouse_class_init(ObjectClass *oc, void *data)
 253 {
 254     DeviceClass *dc = DEVICE_CLASS(oc);
 255     ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
 256     ADBMouseClass *amc = ADB_MOUSE_CLASS(oc);
 257
 258     device_class_set_parent_realize(dc, adb_mouse_realizefn,
 259                                     &amc->parent_realize);
 260     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 261
 262     adc->devreq = adb_mouse_request;
 263     adc->devhasdata = adb_mouse_has_data;
 264     dc->reset = adb_mouse_reset;
 265     dc->vmsd = &vmstate_adb_mouse;
 266 }
 267
 268 static const TypeInfo adb_mouse_type_info = {
 269     .name = TYPE_ADB_MOUSE,
 270     .parent = TYPE_ADB_DEVICE,
 271     .instance_size = sizeof(MouseState),
 272     .instance_init = adb_mouse_initfn,
 273     .class_init = adb_mouse_class_init,
 274     .class_size = sizeof(ADBMouseClass),
 275 };
 276
 277 static void adb_mouse_register_types(void)
 278 {
 279     type_register_static(&adb_mouse_type_info);
 280 }
 281
 282 type_init(adb_mouse_register_types)