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