git.maemo.org Git - qemu/blob - 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 "vl.h"
  25
  26 /* debug only vmmouse */
  27 //#define DEBUG_VMMOUSE
  28
  29 /* VMMouse Commands */
  30 #define VMMOUSE_GETVERSION      10
  31 #define VMMOUSE_DATA            39
  32 #define VMMOUSE_STATUS          40
  33 #define VMMOUSE_COMMAND         41
  34
  35 #define VMMOUSE_READ_ID                 0x45414552
  36 #define VMMOUSE_DISABLE                 0x000000f5
  37 #define VMMOUSE_REQUEST_RELATIVE        0x4c455252
  38 #define VMMOUSE_REQUEST_ABSOLUTE        0x53424152
  39
  40 #define VMMOUSE_QUEUE_SIZE      1024
  41
  42 #define VMMOUSE_VERSION         0x3442554a
  43
  44 #ifdef DEBUG_VMMOUSE
  45 #define DPRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
  46 #else
  47 #define DPRINTF(fmt, ...) do { } while (0)
  48 #endif
  49
  50 typedef struct _VMMouseState
  51 {
  52     uint32_t queue[VMMOUSE_QUEUE_SIZE];
  53     uint16_t nb_queue;
  54     uint16_t status;
  55     uint8_t absolute;
  56     QEMUPutMouseEntry *entry;
  57     void *ps2_mouse;
  58 } VMMouseState;
  59
  60 static uint32_t vmmouse_get_status(VMMouseState *s)
  61 {
  62     DPRINTF("vmmouse_get_status()\n");
  63     return (s->status << 16) | s->nb_queue;
  64 }
  65
  66 static void vmmouse_mouse_event(void *opaque, int x, int y, int dz, int buttons_state)
  67 {
  68     VMMouseState *s = opaque;
  69     int buttons = 0;
  70
  71     if (s->nb_queue > (VMMOUSE_QUEUE_SIZE - 4))
  72         return;
  73
  74     DPRINTF("vmmouse_mouse_event(%d, %d, %d, %d)\n",
  75             x, y, dz, buttons_state);
  76
  77     if ((buttons_state & MOUSE_EVENT_LBUTTON))
  78         buttons |= 0x20;
  79     if ((buttons_state & MOUSE_EVENT_RBUTTON))
  80         buttons |= 0x10;
  81     if ((buttons_state & MOUSE_EVENT_MBUTTON))
  82         buttons |= 0x08;
  83
  84     if (s->absolute) {
  85         x <<= 1;
  86         y <<= 1;
  87     }
  88
  89     s->queue[s->nb_queue++] = buttons;
  90     s->queue[s->nb_queue++] = x;
  91     s->queue[s->nb_queue++] = y;
  92     s->queue[s->nb_queue++] = dz;
  93
  94     /* need to still generate PS2 events to notify driver to
  95        read from queue */
  96     ps2_mouse_fake_event(s->ps2_mouse);
  97 }
  98
  99 static void vmmouse_update_handler(VMMouseState *s)
 100 {
 101     if (s->entry) {
 102         qemu_remove_mouse_event_handler(s->entry);
 103         s->entry = NULL;
 104     }
 105     if (s->status == 0)
 106         s->entry = qemu_add_mouse_event_handler(vmmouse_mouse_event,
 107                                                 s, s->absolute,
 108                                                 "vmmouse");
 109 }
 110
 111 static void vmmouse_read_id(VMMouseState *s)
 112 {
 113     DPRINTF("vmmouse_read_id()\n");
 114
 115     if (s->nb_queue == VMMOUSE_QUEUE_SIZE)
 116         return;
 117
 118     s->queue[s->nb_queue++] = VMMOUSE_VERSION;
 119     s->status = 0;
 120     vmmouse_update_handler(s);
 121 }
 122
 123 static void vmmouse_request_relative(VMMouseState *s)
 124 {
 125     DPRINTF("vmmouse_request_relative()\n");
 126     s->absolute = 0;
 127     vmmouse_update_handler(s);
 128 }
 129
 130 static void vmmouse_request_absolute(VMMouseState *s)
 131 {
 132     DPRINTF("vmmouse_request_absolute()\n");
 133     s->absolute = 1;
 134     vmmouse_update_handler(s);
 135 }
 136
 137 static void vmmouse_disable(VMMouseState *s)
 138 {
 139     DPRINTF("vmmouse_disable()\n");
 140     s->status = 0xffff;
 141     vmmouse_update_handler(s);
 142 }
 143
 144 static void vmmouse_data(VMMouseState *s, uint32_t *data, uint32_t size)
 145 {
 146     int i;
 147
 148     DPRINTF("vmmouse_data(%d)\n", size);
 149
 150     if (size == 0 || size > 6 || size > s->nb_queue) {
 151         printf("vmmouse: driver requested too much data %d\n", size);
 152         s->status = 0xffff;
 153         vmmouse_update_handler(s);
 154         return;
 155     }
 156
 157     for (i = 0; i < size; i++)
 158         data[i] = s->queue[i];
 159
 160     s->nb_queue -= size;
 161     if (s->nb_queue)
 162         memmove(s->queue, &s->queue[size], sizeof(s->queue[0]) * s->nb_queue);
 163 }
 164
 165 static void vmmouse_get_data(uint32_t *data)
 166 {
 167     CPUState *env = cpu_single_env;
 168
 169     data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX];
 170     data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX];
 171     data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI];
 172
 173     DPRINTF("get_data = {%x, %x, %x, %x, %x, %x}\n",
 174             data[0], data[1], data[2], data[3], data[4], data[5]);
 175 }
 176
 177 static void vmmouse_set_data(const uint32_t *data)
 178 {
 179     CPUState *env = cpu_single_env;
 180
 181     DPRINTF("set_data = {%x, %x, %x, %x, %x, %x}\n",
 182             data[0], data[1], data[2], data[3], data[4], data[5]);
 183
 184     env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1];
 185     env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3];
 186     env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5];
 187 }
 188
 189 static uint32_t vmmouse_ioport_read(void *opaque, uint32_t addr)
 190 {
 191     VMMouseState *s = opaque;
 192     uint32_t data[6];
 193     uint16_t command;
 194
 195     vmmouse_get_data(data);
 196
 197     command = data[2] & 0xFFFF;
 198
 199     switch (command) {
 200     case VMMOUSE_STATUS:
 201         data[0] = vmmouse_get_status(s);
 202         break;
 203     case VMMOUSE_COMMAND:
 204         switch (data[1]) {
 205         case VMMOUSE_DISABLE:
 206             vmmouse_disable(s);
 207             break;
 208         case VMMOUSE_READ_ID:
 209             vmmouse_read_id(s);
 210             break;
 211         case VMMOUSE_REQUEST_RELATIVE:
 212             vmmouse_request_relative(s);
 213             break;
 214         case VMMOUSE_REQUEST_ABSOLUTE:
 215             vmmouse_request_absolute(s);
 216             break;
 217         default:
 218             printf("vmmouse: unknown command %x\n", data[1]);
 219             break;
 220         }
 221         break;
 222     case VMMOUSE_DATA:
 223         vmmouse_data(s, data, data[1]);
 224         break;
 225     default:
 226         printf("vmmouse: unknown command %x\n", command);
 227         break;
 228     }
 229
 230     vmmouse_set_data(data);
 231     return data[0];
 232 }
 233
 234 static void vmmouse_save(QEMUFile *f, void *opaque)
 235 {
 236     VMMouseState *s = opaque;
 237     int i;
 238
 239     qemu_put_be32(f, VMMOUSE_QUEUE_SIZE);
 240     for (i = 0; i < VMMOUSE_QUEUE_SIZE; i++)
 241         qemu_put_be32s(f, &s->queue[i]);
 242     qemu_put_be16s(f, &s->nb_queue);
 243     qemu_put_be16s(f, &s->status);
 244     qemu_put_8s(f, &s->absolute);
 245 }
 246
 247 static int vmmouse_load(QEMUFile *f, void *opaque, int version_id)
 248 {
 249     VMMouseState *s = opaque;
 250     int i;
 251
 252     if (version_id != 0)
 253         return -EINVAL;
 254
 255     if (qemu_get_be32(f) != VMMOUSE_QUEUE_SIZE)
 256         return -EINVAL;
 257     for (i = 0; i < VMMOUSE_QUEUE_SIZE; i++)
 258         qemu_get_be32s(f, &s->queue[i]);
 259     qemu_get_be16s(f, &s->nb_queue);
 260     qemu_get_be16s(f, &s->status);
 261     qemu_get_8s(f, &s->absolute);
 262
 263     vmmouse_update_handler(s);
 264
 265     return 0;
 266 }
 267
 268 void *vmmouse_init(void *m)
 269 {
 270     VMMouseState *s = NULL;
 271
 272     DPRINTF("vmmouse_init\n");
 273
 274     s = qemu_mallocz(sizeof(VMMouseState));
 275     if (!s)
 276         return NULL;
 277
 278     s->status = 0xffff;
 279     s->ps2_mouse = m;
 280
 281     vmport_register(VMMOUSE_STATUS, vmmouse_ioport_read, s);
 282     vmport_register(VMMOUSE_COMMAND, vmmouse_ioport_read, s);
 283     vmport_register(VMMOUSE_DATA, vmmouse_ioport_read, s);
 284     register_savevm("vmmouse", 0, 0, vmmouse_save, vmmouse_load, s);
 285
 286     return s;
 287 }
 288