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
  29 /* debug only vmmouse */
  30 //#define DEBUG_VMMOUSE
  31
  32 /* VMMouse Commands */
  33 #define VMMOUSE_GETVERSION      10
  34 #define VMMOUSE_DATA            39
  35 #define VMMOUSE_STATUS          40
  36 #define VMMOUSE_COMMAND         41
  37
  38 #define VMMOUSE_READ_ID                 0x45414552
  39 #define VMMOUSE_DISABLE                 0x000000f5
  40 #define VMMOUSE_REQUEST_RELATIVE        0x4c455252
  41 #define VMMOUSE_REQUEST_ABSOLUTE        0x53424152
  42
  43 #define VMMOUSE_QUEUE_SIZE      1024
  44
  45 #define VMMOUSE_VERSION         0x3442554a
  46
  47 #ifdef DEBUG_VMMOUSE
  48 #define DPRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
  49 #else
  50 #define DPRINTF(fmt, ...) do { } while (0)
  51 #endif
  52
  53 typedef struct _VMMouseState
  54 {
  55     uint32_t queue[VMMOUSE_QUEUE_SIZE];
  56     uint16_t nb_queue;
  57     uint16_t status;
  58     uint8_t absolute;
  59     QEMUPutMouseEntry *entry;
  60     void *ps2_mouse;
  61 } VMMouseState;
  62
  63 static uint32_t vmmouse_get_status(VMMouseState *s)
  64 {
  65     DPRINTF("vmmouse_get_status()\n");
  66     return (s->status << 16) | s->nb_queue;
  67 }
  68
  69 static void vmmouse_mouse_event(void *opaque, int x, int y, int dz, int buttons_state)
  70 {
  71     VMMouseState *s = opaque;
  72     int buttons = 0;
  73
  74     if (s->nb_queue > (VMMOUSE_QUEUE_SIZE - 4))
  75         return;
  76
  77     DPRINTF("vmmouse_mouse_event(%d, %d, %d, %d)\n",
  78             x, y, dz, buttons_state);
  79
  80     if ((buttons_state & MOUSE_EVENT_LBUTTON))
  81         buttons |= 0x20;
  82     if ((buttons_state & MOUSE_EVENT_RBUTTON))
  83         buttons |= 0x10;
  84     if ((buttons_state & MOUSE_EVENT_MBUTTON))
  85         buttons |= 0x08;
  86
  87     if (s->absolute) {
  88         x <<= 1;
  89         y <<= 1;
  90     }
  91
  92     s->queue[s->nb_queue++] = buttons;
  93     s->queue[s->nb_queue++] = x;
  94     s->queue[s->nb_queue++] = y;
  95     s->queue[s->nb_queue++] = dz;
  96
  97     /* need to still generate PS2 events to notify driver to
  98        read from queue */
  99     ps2_mouse_fake_event(s->ps2_mouse);
 100 }
 101
 102 static void vmmouse_update_handler(VMMouseState *s)
 103 {
 104     if (s->entry) {
 105         qemu_remove_mouse_event_handler(s->entry);
 106         s->entry = NULL;
 107     }
 108     if (s->status == 0)
 109         s->entry = qemu_add_mouse_event_handler(vmmouse_mouse_event,
 110                                                 s, s->absolute,
 111                                                 "vmmouse");
 112 }
 113
 114 static void vmmouse_read_id(VMMouseState *s)
 115 {
 116     DPRINTF("vmmouse_read_id()\n");
 117
 118     if (s->nb_queue == VMMOUSE_QUEUE_SIZE)
 119         return;
 120
 121     s->queue[s->nb_queue++] = VMMOUSE_VERSION;
 122     s->status = 0;
 123     vmmouse_update_handler(s);
 124 }
 125
 126 static void vmmouse_request_relative(VMMouseState *s)
 127 {
 128     DPRINTF("vmmouse_request_relative()\n");
 129     s->absolute = 0;
 130     vmmouse_update_handler(s);
 131 }
 132
 133 static void vmmouse_request_absolute(VMMouseState *s)
 134 {
 135     DPRINTF("vmmouse_request_absolute()\n");
 136     s->absolute = 1;
 137     vmmouse_update_handler(s);
 138 }
 139
 140 static void vmmouse_disable(VMMouseState *s)
 141 {
 142     DPRINTF("vmmouse_disable()\n");
 143     s->status = 0xffff;
 144     vmmouse_update_handler(s);
 145 }
 146
 147 static void vmmouse_data(VMMouseState *s, uint32_t *data, uint32_t size)
 148 {
 149     int i;
 150
 151     DPRINTF("vmmouse_data(%d)\n", size);
 152
 153     if (size == 0 || size > 6 || size > s->nb_queue) {
 154         printf("vmmouse: driver requested too much data %d\n", size);
 155         s->status = 0xffff;
 156         vmmouse_update_handler(s);
 157         return;
 158     }
 159
 160     for (i = 0; i < size; i++)
 161         data[i] = s->queue[i];
 162
 163     s->nb_queue -= size;
 164     if (s->nb_queue)
 165         memmove(s->queue, &s->queue[size], sizeof(s->queue[0]) * s->nb_queue);
 166 }
 167
 168 static void vmmouse_get_data(uint32_t *data)
 169 {
 170     CPUState *env = cpu_single_env;
 171
 172     data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX];
 173     data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX];
 174     data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI];
 175
 176     DPRINTF("get_data = {%x, %x, %x, %x, %x, %x}\n",
 177             data[0], data[1], data[2], data[3], data[4], data[5]);
 178 }
 179
 180 static void vmmouse_set_data(const uint32_t *data)
 181 {
 182     CPUState *env = cpu_single_env;
 183
 184     DPRINTF("set_data = {%x, %x, %x, %x, %x, %x}\n",
 185             data[0], data[1], data[2], data[3], data[4], data[5]);
 186
 187     env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1];
 188     env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3];
 189     env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5];
 190 }
 191
 192 static uint32_t vmmouse_ioport_read(void *opaque, uint32_t addr)
 193 {
 194     VMMouseState *s = opaque;
 195     uint32_t data[6];
 196     uint16_t command;
 197
 198     vmmouse_get_data(data);
 199
 200     command = data[2] & 0xFFFF;
 201
 202     switch (command) {
 203     case VMMOUSE_STATUS:
 204         data[0] = vmmouse_get_status(s);
 205         break;
 206     case VMMOUSE_COMMAND:
 207         switch (data[1]) {
 208         case VMMOUSE_DISABLE:
 209             vmmouse_disable(s);
 210             break;
 211         case VMMOUSE_READ_ID:
 212             vmmouse_read_id(s);
 213             break;
 214         case VMMOUSE_REQUEST_RELATIVE:
 215             vmmouse_request_relative(s);
 216             break;
 217         case VMMOUSE_REQUEST_ABSOLUTE:
 218             vmmouse_request_absolute(s);
 219             break;
 220         default:
 221             printf("vmmouse: unknown command %x\n", data[1]);
 222             break;
 223         }
 224         break;
 225     case VMMOUSE_DATA:
 226         vmmouse_data(s, data, data[1]);
 227         break;
 228     default:
 229         printf("vmmouse: unknown command %x\n", command);
 230         break;
 231     }
 232
 233     vmmouse_set_data(data);
 234     return data[0];
 235 }
 236
 237 static void vmmouse_save(QEMUFile *f, void *opaque)
 238 {
 239     VMMouseState *s = opaque;
 240     int i;
 241
 242     qemu_put_be32(f, VMMOUSE_QUEUE_SIZE);
 243     for (i = 0; i < VMMOUSE_QUEUE_SIZE; i++)
 244         qemu_put_be32s(f, &s->queue[i]);
 245     qemu_put_be16s(f, &s->nb_queue);
 246     qemu_put_be16s(f, &s->status);
 247     qemu_put_8s(f, &s->absolute);
 248 }
 249
 250 static int vmmouse_load(QEMUFile *f, void *opaque, int version_id)
 251 {
 252     VMMouseState *s = opaque;
 253     int i;
 254
 255     if (version_id != 0)
 256         return -EINVAL;
 257
 258     if (qemu_get_be32(f) != VMMOUSE_QUEUE_SIZE)
 259         return -EINVAL;
 260     for (i = 0; i < VMMOUSE_QUEUE_SIZE; i++)
 261         qemu_get_be32s(f, &s->queue[i]);
 262     qemu_get_be16s(f, &s->nb_queue);
 263     qemu_get_be16s(f, &s->status);
 264     qemu_get_8s(f, &s->absolute);
 265
 266     vmmouse_update_handler(s);
 267
 268     return 0;
 269 }
 270
 271 void *vmmouse_init(void *m)
 272 {
 273     VMMouseState *s = NULL;
 274
 275     DPRINTF("vmmouse_init\n");
 276
 277     s = qemu_mallocz(sizeof(VMMouseState));
 278     if (!s)
 279         return NULL;
 280
 281     s->status = 0xffff;
 282     s->ps2_mouse = m;
 283
 284     vmport_register(VMMOUSE_STATUS, vmmouse_ioport_read, s);
 285     vmport_register(VMMOUSE_COMMAND, vmmouse_ioport_read, s);
 286     vmport_register(VMMOUSE_DATA, vmmouse_ioport_read, s);
 287     register_savevm("vmmouse", 0, 0, vmmouse_save, vmmouse_load, s);
 288
 289     return s;
 290 }
 291