hw/i386/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
  25 #include "qemu/osdep.h"
  26 #include "qapi/error.h"
  27 #include "ui/console.h"
  28 #include "hw/i386/vmport.h"
  29 #include "hw/input/i8042.h"
  30 #include "hw/qdev-properties.h"
  31 #include "migration/vmstate.h"
  32 #include "cpu.h"
  33 #include "qom/object.h"
  34
  35 /* debug only vmmouse */
  36 //#define DEBUG_VMMOUSE
  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 #define TYPE_VMMOUSE "vmmouse"
  54 OBJECT_DECLARE_SIMPLE_TYPE(VMMouseState, VMMOUSE)
  55
  56 struct VMMouseState {
  57     ISADevice parent_obj;
  58
  59     uint32_t queue[VMMOUSE_QUEUE_SIZE];
  60     int32_t queue_size;
  61     uint16_t nb_queue;
  62     uint16_t status;
  63     uint8_t absolute;
  64     QEMUPutMouseEntry *entry;
  65     ISAKBDState *i8042;
  66 };
  67
  68 static void vmmouse_get_data(uint32_t *data)
  69 {
  70     X86CPU *cpu = X86_CPU(current_cpu);
  71     CPUX86State *env = &cpu->env;
  72
  73     data[0] = env->regs[R_EAX]; data[1] = env->regs[R_EBX];
  74     data[2] = env->regs[R_ECX]; data[3] = env->regs[R_EDX];
  75     data[4] = env->regs[R_ESI]; data[5] = env->regs[R_EDI];
  76 }
  77
  78 static void vmmouse_set_data(const uint32_t *data)
  79 {
  80     X86CPU *cpu = X86_CPU(current_cpu);
  81     CPUX86State *env = &cpu->env;
  82
  83     env->regs[R_EAX] = data[0]; env->regs[R_EBX] = data[1];
  84     env->regs[R_ECX] = data[2]; env->regs[R_EDX] = data[3];
  85     env->regs[R_ESI] = data[4]; env->regs[R_EDI] = data[5];
  86 }
  87
  88 static uint32_t vmmouse_get_status(VMMouseState *s)
  89 {
  90     DPRINTF("vmmouse_get_status()\n");
  91     return (s->status << 16) | s->nb_queue;
  92 }
  93
  94 static void vmmouse_mouse_event(void *opaque, int x, int y, int dz, int buttons_state)
  95 {
  96     VMMouseState *s = opaque;
  97     int buttons = 0;
  98
  99     if (s->nb_queue > (VMMOUSE_QUEUE_SIZE - 4))
 100         return;
 101
 102     DPRINTF("vmmouse_mouse_event(%d, %d, %d, %d)\n",
 103             x, y, dz, buttons_state);
 104
 105     if ((buttons_state & MOUSE_EVENT_LBUTTON))
 106         buttons |= 0x20;
 107     if ((buttons_state & MOUSE_EVENT_RBUTTON))
 108         buttons |= 0x10;
 109     if ((buttons_state & MOUSE_EVENT_MBUTTON))
 110         buttons |= 0x08;
 111
 112     if (s->absolute) {
 113         x <<= 1;
 114         y <<= 1;
 115     }
 116
 117     s->queue[s->nb_queue++] = buttons;
 118     s->queue[s->nb_queue++] = x;
 119     s->queue[s->nb_queue++] = y;
 120     s->queue[s->nb_queue++] = dz;
 121
 122     /* need to still generate PS2 events to notify driver to
 123        read from queue */
 124     i8042_isa_mouse_fake_event(s->i8042);
 125 }
 126
 127 static void vmmouse_remove_handler(VMMouseState *s)
 128 {
 129     if (s->entry) {
 130         qemu_remove_mouse_event_handler(s->entry);
 131         s->entry = NULL;
 132     }
 133 }
 134
 135 static void vmmouse_update_handler(VMMouseState *s, int absolute)
 136 {
 137     if (s->status != 0) {
 138         return;
 139     }
 140     if (s->absolute != absolute) {
 141         s->absolute = absolute;
 142         vmmouse_remove_handler(s);
 143     }
 144     if (s->entry == NULL) {
 145         s->entry = qemu_add_mouse_event_handler(vmmouse_mouse_event,
 146                                                 s, s->absolute,
 147                                                 "vmmouse");
 148         qemu_activate_mouse_event_handler(s->entry);
 149     }
 150 }
 151
 152 static void vmmouse_read_id(VMMouseState *s)
 153 {
 154     DPRINTF("vmmouse_read_id()\n");
 155
 156     if (s->nb_queue == VMMOUSE_QUEUE_SIZE)
 157         return;
 158
 159     s->queue[s->nb_queue++] = VMMOUSE_VERSION;
 160     s->status = 0;
 161 }
 162
 163 static void vmmouse_request_relative(VMMouseState *s)
 164 {
 165     DPRINTF("vmmouse_request_relative()\n");
 166     vmmouse_update_handler(s, 0);
 167 }
 168
 169 static void vmmouse_request_absolute(VMMouseState *s)
 170 {
 171     DPRINTF("vmmouse_request_absolute()\n");
 172     vmmouse_update_handler(s, 1);
 173 }
 174
 175 static void vmmouse_disable(VMMouseState *s)
 176 {
 177     DPRINTF("vmmouse_disable()\n");
 178     s->status = 0xffff;
 179     vmmouse_remove_handler(s);
 180 }
 181
 182 static void vmmouse_data(VMMouseState *s, uint32_t *data, uint32_t size)
 183 {
 184     int i;
 185
 186     DPRINTF("vmmouse_data(%d)\n", size);
 187
 188     if (size == 0 || size > 6 || size > s->nb_queue) {
 189         printf("vmmouse: driver requested too much data %d\n", size);
 190         s->status = 0xffff;
 191         vmmouse_remove_handler(s);
 192         return;
 193     }
 194
 195     for (i = 0; i < size; i++)
 196         data[i] = s->queue[i];
 197
 198     s->nb_queue -= size;
 199     if (s->nb_queue)
 200         memmove(s->queue, &s->queue[size], sizeof(s->queue[0]) * s->nb_queue);
 201 }
 202
 203 static uint32_t vmmouse_ioport_read(void *opaque, uint32_t addr)
 204 {
 205     VMMouseState *s = opaque;
 206     uint32_t data[6];
 207     uint16_t command;
 208
 209     vmmouse_get_data(data);
 210
 211     command = data[2] & 0xFFFF;
 212
 213     switch (command) {
 214     case VMPORT_CMD_VMMOUSE_STATUS:
 215         data[0] = vmmouse_get_status(s);
 216         break;
 217     case VMPORT_CMD_VMMOUSE_COMMAND:
 218         switch (data[1]) {
 219         case VMMOUSE_DISABLE:
 220             vmmouse_disable(s);
 221             break;
 222         case VMMOUSE_READ_ID:
 223             vmmouse_read_id(s);
 224             break;
 225         case VMMOUSE_REQUEST_RELATIVE:
 226             vmmouse_request_relative(s);
 227             break;
 228         case VMMOUSE_REQUEST_ABSOLUTE:
 229             vmmouse_request_absolute(s);
 230             break;
 231         default:
 232             printf("vmmouse: unknown command %x\n", data[1]);
 233             break;
 234         }
 235         break;
 236     case VMPORT_CMD_VMMOUSE_DATA:
 237         vmmouse_data(s, data, data[1]);
 238         break;
 239     default:
 240         printf("vmmouse: unknown command %x\n", command);
 241         break;
 242     }
 243
 244     vmmouse_set_data(data);
 245     return data[0];
 246 }
 247
 248 static int vmmouse_post_load(void *opaque, int version_id)
 249 {
 250     VMMouseState *s = opaque;
 251
 252     vmmouse_remove_handler(s);
 253     vmmouse_update_handler(s, s->absolute);
 254     return 0;
 255 }
 256
 257 static const VMStateDescription vmstate_vmmouse = {
 258     .name = "vmmouse",
 259     .version_id = 0,
 260     .minimum_version_id = 0,
 261     .post_load = vmmouse_post_load,
 262     .fields = (VMStateField[]) {
 263         VMSTATE_INT32_EQUAL(queue_size, VMMouseState, NULL),
 264         VMSTATE_UINT32_ARRAY(queue, VMMouseState, VMMOUSE_QUEUE_SIZE),
 265         VMSTATE_UINT16(nb_queue, VMMouseState),
 266         VMSTATE_UINT16(status, VMMouseState),
 267         VMSTATE_UINT8(absolute, VMMouseState),
 268         VMSTATE_END_OF_LIST()
 269     }
 270 };
 271
 272 static void vmmouse_reset(DeviceState *d)
 273 {
 274     VMMouseState *s = VMMOUSE(d);
 275
 276     s->queue_size = VMMOUSE_QUEUE_SIZE;
 277     s->nb_queue = 0;
 278
 279     vmmouse_disable(s);
 280 }
 281
 282 static void vmmouse_realizefn(DeviceState *dev, Error **errp)
 283 {
 284     VMMouseState *s = VMMOUSE(dev);
 285
 286     DPRINTF("vmmouse_init\n");
 287
 288     if (!object_resolve_path_type("", TYPE_VMPORT, NULL)) {
 289         error_setg(errp, "vmmouse needs a machine with vmport");
 290         return;
 291     }
 292
 293     vmport_register(VMPORT_CMD_VMMOUSE_STATUS, vmmouse_ioport_read, s);
 294     vmport_register(VMPORT_CMD_VMMOUSE_COMMAND, vmmouse_ioport_read, s);
 295     vmport_register(VMPORT_CMD_VMMOUSE_DATA, vmmouse_ioport_read, s);
 296 }
 297
 298 static Property vmmouse_properties[] = {
 299     DEFINE_PROP_LINK("i8042", VMMouseState, i8042, TYPE_I8042, ISAKBDState *),
 300     DEFINE_PROP_END_OF_LIST(),
 301 };
 302
 303 static void vmmouse_class_initfn(ObjectClass *klass, void *data)
 304 {
 305     DeviceClass *dc = DEVICE_CLASS(klass);
 306
 307     dc->realize = vmmouse_realizefn;
 308     dc->reset = vmmouse_reset;
 309     dc->vmsd = &vmstate_vmmouse;
 310     device_class_set_props(dc, vmmouse_properties);
 311 }
 312
 313 static const TypeInfo vmmouse_info = {
 314     .name          = TYPE_VMMOUSE,
 315     .parent        = TYPE_ISA_DEVICE,
 316     .instance_size = sizeof(VMMouseState),
 317     .class_init    = vmmouse_class_initfn,
 318 };
 319
 320 static void vmmouse_register_types(void)
 321 {
 322     type_register_static(&vmmouse_info);
 323 }
 324
 325 type_init(vmmouse_register_types)