hw/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.h"
  25 #include "console.h"
  26 #include "ps2.h"
  27 #include "pc.h"
  28 #include "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 typedef struct _VMMouseState
  55 {
  56     ISADevice dev;
  57     uint32_t queue[VMMOUSE_QUEUE_SIZE];
  58     int32_t queue_size;
  59     uint16_t nb_queue;
  60     uint16_t status;
  61     uint8_t absolute;
  62     QEMUPutMouseEntry *entry;
  63     void *ps2_mouse;
  64 } VMMouseState;
  65
  66 static uint32_t vmmouse_get_status(VMMouseState *s)
  67 {
  68     DPRINTF("vmmouse_get_status()\n");
  69     return (s->status << 16) | s->nb_queue;
  70 }
  71
  72 static void vmmouse_mouse_event(void *opaque, int x, int y, int dz, int buttons_state)
  73 {
  74     VMMouseState *s = opaque;
  75     int buttons = 0;
  76
  77     if (s->nb_queue > (VMMOUSE_QUEUE_SIZE - 4))
  78         return;
  79
  80     DPRINTF("vmmouse_mouse_event(%d, %d, %d, %d)\n",
  81             x, y, dz, buttons_state);
  82
  83     if ((buttons_state & MOUSE_EVENT_LBUTTON))
  84         buttons |= 0x20;
  85     if ((buttons_state & MOUSE_EVENT_RBUTTON))
  86         buttons |= 0x10;
  87     if ((buttons_state & MOUSE_EVENT_MBUTTON))
  88         buttons |= 0x08;
  89
  90     if (s->absolute) {
  91         x <<= 1;
  92         y <<= 1;
  93     }
  94
  95     s->queue[s->nb_queue++] = buttons;
  96     s->queue[s->nb_queue++] = x;
  97     s->queue[s->nb_queue++] = y;
  98     s->queue[s->nb_queue++] = dz;
  99
 100     /* need to still generate PS2 events to notify driver to
 101        read from queue */
 102     i8042_isa_mouse_fake_event(s->ps2_mouse);
 103 }
 104
 105 static void vmmouse_remove_handler(VMMouseState *s)
 106 {
 107     if (s->entry) {
 108         qemu_remove_mouse_event_handler(s->entry);
 109         s->entry = NULL;
 110     }
 111 }
 112
 113 static void vmmouse_update_handler(VMMouseState *s, int absolute)
 114 {
 115     if (s->status != 0) {
 116         return;
 117     }
 118     if (s->absolute != absolute) {
 119         s->absolute = absolute;
 120         vmmouse_remove_handler(s);
 121     }
 122     if (s->entry == NULL) {
 123         s->entry = qemu_add_mouse_event_handler(vmmouse_mouse_event,
 124                                                 s, s->absolute,
 125                                                 "vmmouse");
 126         qemu_activate_mouse_event_handler(s->entry);
 127     }
 128 }
 129
 130 static void vmmouse_read_id(VMMouseState *s)
 131 {
 132     DPRINTF("vmmouse_read_id()\n");
 133
 134     if (s->nb_queue == VMMOUSE_QUEUE_SIZE)
 135         return;
 136
 137     s->queue[s->nb_queue++] = VMMOUSE_VERSION;
 138     s->status = 0;
 139 }
 140
 141 static void vmmouse_request_relative(VMMouseState *s)
 142 {
 143     DPRINTF("vmmouse_request_relative()\n");
 144     vmmouse_update_handler(s, 0);
 145 }
 146
 147 static void vmmouse_request_absolute(VMMouseState *s)
 148 {
 149     DPRINTF("vmmouse_request_absolute()\n");
 150     vmmouse_update_handler(s, 1);
 151 }
 152
 153 static void vmmouse_disable(VMMouseState *s)
 154 {
 155     DPRINTF("vmmouse_disable()\n");
 156     s->status = 0xffff;
 157     vmmouse_remove_handler(s);
 158 }
 159
 160 static void vmmouse_data(VMMouseState *s, uint32_t *data, uint32_t size)
 161 {
 162     int i;
 163
 164     DPRINTF("vmmouse_data(%d)\n", size);
 165
 166     if (size == 0 || size > 6 || size > s->nb_queue) {
 167         printf("vmmouse: driver requested too much data %d\n", size);
 168         s->status = 0xffff;
 169         vmmouse_remove_handler(s);
 170         return;
 171     }
 172
 173     for (i = 0; i < size; i++)
 174         data[i] = s->queue[i];
 175
 176     s->nb_queue -= size;
 177     if (s->nb_queue)
 178         memmove(s->queue, &s->queue[size], sizeof(s->queue[0]) * s->nb_queue);
 179 }
 180
 181 static uint32_t vmmouse_ioport_read(void *opaque, uint32_t addr)
 182 {
 183     VMMouseState *s = opaque;
 184     uint32_t data[6];
 185     uint16_t command;
 186
 187     vmmouse_get_data(data);
 188
 189     command = data[2] & 0xFFFF;
 190
 191     switch (command) {
 192     case VMMOUSE_STATUS:
 193         data[0] = vmmouse_get_status(s);
 194         break;
 195     case VMMOUSE_COMMAND:
 196         switch (data[1]) {
 197         case VMMOUSE_DISABLE:
 198             vmmouse_disable(s);
 199             break;
 200         case VMMOUSE_READ_ID:
 201             vmmouse_read_id(s);
 202             break;
 203         case VMMOUSE_REQUEST_RELATIVE:
 204             vmmouse_request_relative(s);
 205             break;
 206         case VMMOUSE_REQUEST_ABSOLUTE:
 207             vmmouse_request_absolute(s);
 208             break;
 209         default:
 210             printf("vmmouse: unknown command %x\n", data[1]);
 211             break;
 212         }
 213         break;
 214     case VMMOUSE_DATA:
 215         vmmouse_data(s, data, data[1]);
 216         break;
 217     default:
 218         printf("vmmouse: unknown command %x\n", command);
 219         break;
 220     }
 221
 222     vmmouse_set_data(data);
 223     return data[0];
 224 }
 225
 226 static int vmmouse_post_load(void *opaque, int version_id)
 227 {
 228     VMMouseState *s = opaque;
 229
 230     vmmouse_remove_handler(s);
 231     vmmouse_update_handler(s, s->absolute);
 232     return 0;
 233 }
 234
 235 static const VMStateDescription vmstate_vmmouse = {
 236     .name = "vmmouse",
 237     .version_id = 0,
 238     .minimum_version_id = 0,
 239     .minimum_version_id_old = 0,
 240     .post_load = vmmouse_post_load,
 241     .fields      = (VMStateField []) {
 242         VMSTATE_INT32_EQUAL(queue_size, VMMouseState),
 243         VMSTATE_UINT32_ARRAY(queue, VMMouseState, VMMOUSE_QUEUE_SIZE),
 244         VMSTATE_UINT16(nb_queue, VMMouseState),
 245         VMSTATE_UINT16(status, VMMouseState),
 246         VMSTATE_UINT8(absolute, VMMouseState),
 247         VMSTATE_END_OF_LIST()
 248     }
 249 };
 250
 251 static void vmmouse_reset(DeviceState *d)
 252 {
 253     VMMouseState *s = container_of(d, VMMouseState, dev.qdev);
 254
 255     s->status = 0xffff;
 256     s->queue_size = VMMOUSE_QUEUE_SIZE;
 257 }
 258
 259 static int vmmouse_initfn(ISADevice *dev)
 260 {
 261     VMMouseState *s = DO_UPCAST(VMMouseState, dev, dev);
 262
 263     DPRINTF("vmmouse_init\n");
 264
 265     vmport_register(VMMOUSE_STATUS, vmmouse_ioport_read, s);
 266     vmport_register(VMMOUSE_COMMAND, vmmouse_ioport_read, s);
 267     vmport_register(VMMOUSE_DATA, vmmouse_ioport_read, s);
 268     vmstate_register(NULL, 0, &vmstate_vmmouse, s);
 269
 270     return 0;
 271 }
 272
 273 static ISADeviceInfo vmmouse_info = {
 274     .init          = vmmouse_initfn,
 275     .qdev.name     = "vmmouse",
 276     .qdev.size     = sizeof(VMMouseState),
 277     .qdev.no_user  = 1,
 278     .qdev.reset    = vmmouse_reset,
 279     .qdev.props = (Property[]) {
 280         DEFINE_PROP_PTR("ps2_mouse", VMMouseState, ps2_mouse),
 281         DEFINE_PROP_END_OF_LIST(),
 282     }
 283 };
 284
 285 static void vmmouse_dev_register(void)
 286 {
 287     isa_qdev_register(&vmmouse_info);
 288 }
 289 device_init(vmmouse_dev_register)