qemu/hw/input/vmmouse.c

   1 /*
   2  * QEMU VMMouse emulation
   3  *
   4  * Copyright (C) 2007 Anthony Liguori <anthony@codemonkey.ws>
   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 "hw/hw.h"
  25 #include "ui/console.h"
  26 #include "hw/input/ps2.h"
  27 #include "hw/i386/pc.h"
  28 #include "hw/qdev.h"
  29
  30 /* debug only vmmouse */
  31 //#define DEBUG_VMMOUSE
  32
  33 /* VMMouse Commands */
  34 #define VMMOUSE_GETVERSION      10
  35 #define VMMOUSE_DATA            39
  36 #define VMMOUSE_STATUS          40
  37 #define VMMOUSE_COMMAND         41
  38
  39 #define VMMOUSE_READ_ID                 0x45414552
  40 #define VMMOUSE_DISABLE                 0x000000f5
  41 #define VMMOUSE_REQUEST_RELATIVE        0x4c455252
  42 #define VMMOUSE_REQUEST_ABSOLUTE        0x53424152
  43
  44 #define VMMOUSE_QUEUE_SIZE      1024
  45
  46 #define VMMOUSE_VERSION         0x3442554a
  47
  48 #ifdef DEBUG_VMMOUSE
  49 #define DPRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
  50 #else
  51 #define DPRINTF(fmt, ...) do { } while (0)
  52 #endif
  53
  54 #define TYPE_VMMOUSE "vmmouse"
  55 #define VMMOUSE(obj) OBJECT_CHECK(VMMouseState, (obj), TYPE_VMMOUSE)
  56
  57 typedef struct VMMouseState
  58 {
  59     ISADevice parent_obj;
  60
  61     uint32_t queue[VMMOUSE_QUEUE_SIZE];
  62     int32_t queue_size;
  63     uint16_t nb_queue;
  64     uint16_t status;
  65     uint8_t absolute;
  66     QEMUPutMouseEntry *entry;
  67     void *ps2_mouse;
  68 } VMMouseState;
  69
  70 static uint32_t vmmouse_get_status(VMMouseState *s)
  71 {
  72     DPRINTF("vmmouse_get_status()\n");
  73     return (s->status << 16) | s->nb_queue;
  74 }
  75
  76 static void vmmouse_mouse_event(void *opaque, int x, int y, int dz, int buttons_state)
  77 {
  78     VMMouseState *s = opaque;
  79     int buttons = 0;
  80
  81     if (s->nb_queue > (VMMOUSE_QUEUE_SIZE - 4))
  82         return;
  83
  84     DPRINTF("vmmouse_mouse_event(%d, %d, %d, %d)\n",
  85             x, y, dz, buttons_state);
  86
  87     if ((buttons_state & MOUSE_EVENT_LBUTTON))
  88         buttons |= 0x20;
  89     if ((buttons_state & MOUSE_EVENT_RBUTTON))
  90         buttons |= 0x10;
  91     if ((buttons_state & MOUSE_EVENT_MBUTTON))
  92         buttons |= 0x08;
  93
  94     if (s->absolute) {
  95         x <<= 1;
  96         y <<= 1;
  97     }
  98
  99     s->queue[s->nb_queue++] = buttons;
 100     s->queue[s->nb_queue++] = x;
 101     s->queue[s->nb_queue++] = y;
 102     s->queue[s->nb_queue++] = dz;
 103
 104     /* need to still generate PS2 events to notify driver to
 105        read from queue */
 106     i8042_isa_mouse_fake_event(s->ps2_mouse);
 107 }
 108
 109 static void vmmouse_remove_handler(VMMouseState *s)
 110 {
 111     if (s->entry) {
 112         qemu_remove_mouse_event_handler(s->entry);
 113         s->entry = NULL;
 114     }
 115 }
 116
 117 static void vmmouse_update_handler(VMMouseState *s, int absolute)
 118 {
 119     if (s->status != 0) {
 120         return;
 121     }
 122     if (s->absolute != absolute) {
 123         s->absolute = absolute;
 124         vmmouse_remove_handler(s);
 125     }
 126     if (s->entry == NULL) {
 127         s->entry = qemu_add_mouse_event_handler(vmmouse_mouse_event,
 128                                                 s, s->absolute,
 129                                                 "vmmouse");
 130         qemu_activate_mouse_event_handler(s->entry);
 131     }
 132 }
 133
 134 static void vmmouse_read_id(VMMouseState *s)
 135 {
 136     DPRINTF("vmmouse_read_id()\n");
 137
 138     if (s->nb_queue == VMMOUSE_QUEUE_SIZE)
 139         return;
 140
 141     s->queue[s->nb_queue++] = VMMOUSE_VERSION;
 142     s->status = 0;
 143 }
 144
 145 static void vmmouse_request_relative(VMMouseState *s)
 146 {
 147     DPRINTF("vmmouse_request_relative()\n");
 148     vmmouse_update_handler(s, 0);
 149 }
 150
 151 static void vmmouse_request_absolute(VMMouseState *s)
 152 {
 153     DPRINTF("vmmouse_request_absolute()\n");
 154     vmmouse_update_handler(s, 1);
 155 }
 156
 157 static void vmmouse_disable(VMMouseState *s)
 158 {
 159     DPRINTF("vmmouse_disable()\n");
 160     s->status = 0xffff;
 161     vmmouse_remove_handler(s);
 162 }
 163
 164 static void vmmouse_data(VMMouseState *s, uint32_t *data, uint32_t size)
 165 {
 166     int i;
 167
 168     DPRINTF("vmmouse_data(%d)\n", size);
 169
 170     if (size == 0 || size > 6 || size > s->nb_queue) {
 171         printf("vmmouse: driver requested too much data %d\n", size);
 172         s->status = 0xffff;
 173         vmmouse_remove_handler(s);
 174         return;
 175     }
 176
 177     for (i = 0; i < size; i++)
 178         data[i] = s->queue[i];
 179
 180     s->nb_queue -= size;
 181     if (s->nb_queue)
 182         memmove(s->queue, &s->queue[size], sizeof(s->queue[0]) * s->nb_queue);
 183 }
 184
 185 static uint32_t vmmouse_ioport_read(void *opaque, uint32_t addr)
 186 {
 187     VMMouseState *s = opaque;
 188     uint32_t data[6];
 189     uint16_t command;
 190
 191     vmmouse_get_data(data);
 192
 193     command = data[2] & 0xFFFF;
 194
 195     switch (command) {
 196     case VMMOUSE_STATUS:
 197         data[0] = vmmouse_get_status(s);
 198         break;
 199     case VMMOUSE_COMMAND:
 200         switch (data[1]) {
 201         case VMMOUSE_DISABLE:
 202             vmmouse_disable(s);
 203             break;
 204         case VMMOUSE_READ_ID:
 205             vmmouse_read_id(s);
 206             break;
 207         case VMMOUSE_REQUEST_RELATIVE:
 208             vmmouse_request_relative(s);
 209             break;
 210         case VMMOUSE_REQUEST_ABSOLUTE:
 211             vmmouse_request_absolute(s);
 212             break;
 213         default:
 214             printf("vmmouse: unknown command %x\n", data[1]);
 215             break;
 216         }
 217         break;
 218     case VMMOUSE_DATA:
 219         vmmouse_data(s, data, data[1]);
 220         break;
 221     default:
 222         printf("vmmouse: unknown command %x\n", command);
 223         break;
 224     }
 225
 226     vmmouse_set_data(data);
 227     return data[0];
 228 }
 229
 230 static int vmmouse_post_load(void *opaque, int version_id)
 231 {
 232     VMMouseState *s = opaque;
 233
 234     vmmouse_remove_handler(s);
 235     vmmouse_update_handler(s, s->absolute);
 236     return 0;
 237 }
 238
 239 static const VMStateDescription vmstate_vmmouse = {
 240     .name = "vmmouse",
 241     .version_id = 0,
 242     .minimum_version_id = 0,
 243     .post_load = vmmouse_post_load,
 244     .fields = (VMStateField[]) {
 245         VMSTATE_INT32_EQUAL(queue_size, VMMouseState),
 246         VMSTATE_UINT32_ARRAY(queue, VMMouseState, VMMOUSE_QUEUE_SIZE),
 247         VMSTATE_UINT16(nb_queue, VMMouseState),
 248         VMSTATE_UINT16(status, VMMouseState),
 249         VMSTATE_UINT8(absolute, VMMouseState),
 250         VMSTATE_END_OF_LIST()
 251     }
 252 };
 253
 254 static void vmmouse_reset(DeviceState *d)
 255 {
 256     VMMouseState *s = VMMOUSE(d);
 257
 258     s->queue_size = VMMOUSE_QUEUE_SIZE;
 259
 260     vmmouse_disable(s);
 261 }
 262
 263 static void vmmouse_realizefn(DeviceState *dev, Error **errp)
 264 {
 265     VMMouseState *s = VMMOUSE(dev);
 266
 267     DPRINTF("vmmouse_init\n");
 268
 269     vmport_register(VMMOUSE_STATUS, vmmouse_ioport_read, s);
 270     vmport_register(VMMOUSE_COMMAND, vmmouse_ioport_read, s);
 271     vmport_register(VMMOUSE_DATA, vmmouse_ioport_read, s);
 272 }
 273
 274 static Property vmmouse_properties[] = {
 275     DEFINE_PROP_PTR("ps2_mouse", VMMouseState, ps2_mouse),
 276     DEFINE_PROP_END_OF_LIST(),
 277 };
 278
 279 static void vmmouse_class_initfn(ObjectClass *klass, void *data)
 280 {
 281     DeviceClass *dc = DEVICE_CLASS(klass);
 282
 283     dc->realize = vmmouse_realizefn;
 284     dc->reset = vmmouse_reset;
 285     dc->vmsd = &vmstate_vmmouse;
 286     dc->props = vmmouse_properties;
 287     /* Reason: pointer property "ps2_mouse" */
 288     dc->cannot_instantiate_with_device_add_yet = true;
 289 }
 290
 291 static const TypeInfo vmmouse_info = {
 292     .name          = TYPE_VMMOUSE,
 293     .parent        = TYPE_ISA_DEVICE,
 294     .instance_size = sizeof(VMMouseState),
 295     .class_init    = vmmouse_class_initfn,
 296 };
 297
 298 static void vmmouse_register_types(void)
 299 {
 300     type_register_static(&vmmouse_info);
 301 }
 302
 303 type_init(vmmouse_register_types)