1 /* 2 * QEMU ADB mouse support 3 * 4 * Copyright (c) 2004 Fabrice Bellard 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 "ui/console.h" 27 #include "hw/input/adb.h" 28 #include "migration/vmstate.h" 29 #include "qemu/module.h" 30 #include "adb-internal.h" 31 #include "trace.h" 32 33 #define ADB_MOUSE(obj) OBJECT_CHECK(MouseState, (obj), TYPE_ADB_MOUSE) 34 35 typedef struct MouseState { 36 /*< public >*/ 37 ADBDevice parent_obj; 38 /*< private >*/ 39 40 int buttons_state, last_buttons_state; 41 int dx, dy, dz; 42 } MouseState; 43 44 #define ADB_MOUSE_CLASS(class) \ 45 OBJECT_CLASS_CHECK(ADBMouseClass, (class), TYPE_ADB_MOUSE) 46 #define ADB_MOUSE_GET_CLASS(obj) \ 47 OBJECT_GET_CLASS(ADBMouseClass, (obj), TYPE_ADB_MOUSE) 48 49 typedef struct ADBMouseClass { 50 /*< public >*/ 51 ADBDeviceClass parent_class; 52 /*< private >*/ 53 54 DeviceRealize parent_realize; 55 } ADBMouseClass; 56 57 static void adb_mouse_event(void *opaque, 58 int dx1, int dy1, int dz1, int buttons_state) 59 { 60 MouseState *s = opaque; 61 62 s->dx += dx1; 63 s->dy += dy1; 64 s->dz += dz1; 65 s->buttons_state = buttons_state; 66 } 67 68 69 static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf) 70 { 71 MouseState *s = ADB_MOUSE(d); 72 int dx, dy; 73 74 if (s->last_buttons_state == s->buttons_state && 75 s->dx == 0 && s->dy == 0) { 76 return 0; 77 } 78 79 dx = s->dx; 80 if (dx < -63) { 81 dx = -63; 82 } else if (dx > 63) { 83 dx = 63; 84 } 85 86 dy = s->dy; 87 if (dy < -63) { 88 dy = -63; 89 } else if (dy > 63) { 90 dy = 63; 91 } 92 93 s->dx -= dx; 94 s->dy -= dy; 95 s->last_buttons_state = s->buttons_state; 96 97 dx &= 0x7f; 98 dy &= 0x7f; 99 100 if (!(s->buttons_state & MOUSE_EVENT_LBUTTON)) { 101 dy |= 0x80; 102 } 103 if (!(s->buttons_state & MOUSE_EVENT_RBUTTON)) { 104 dx |= 0x80; 105 } 106 107 obuf[0] = dy; 108 obuf[1] = dx; 109 return 2; 110 } 111 112 static int adb_mouse_request(ADBDevice *d, uint8_t *obuf, 113 const uint8_t *buf, int len) 114 { 115 MouseState *s = ADB_MOUSE(d); 116 int cmd, reg, olen; 117 118 if ((buf[0] & 0x0f) == ADB_FLUSH) { 119 /* flush mouse fifo */ 120 s->buttons_state = s->last_buttons_state; 121 s->dx = 0; 122 s->dy = 0; 123 s->dz = 0; 124 trace_adb_mouse_flush(); 125 return 0; 126 } 127 128 cmd = buf[0] & 0xc; 129 reg = buf[0] & 0x3; 130 olen = 0; 131 switch (cmd) { 132 case ADB_WRITEREG: 133 trace_adb_mouse_writereg(reg, buf[1]); 134 switch (reg) { 135 case 2: 136 break; 137 case 3: 138 switch (buf[2]) { 139 case ADB_CMD_SELF_TEST: 140 break; 141 case ADB_CMD_CHANGE_ID: 142 case ADB_CMD_CHANGE_ID_AND_ACT: 143 case ADB_CMD_CHANGE_ID_AND_ENABLE: 144 d->devaddr = buf[1] & 0xf; 145 trace_adb_mouse_request_change_addr(d->devaddr); 146 break; 147 default: 148 if (!d->disable_direct_reg3_writes) { 149 d->devaddr = buf[1] & 0xf; 150 151 /* we support handlers: 152 * 0x01: Classic Apple Mouse Protocol / 100 cpi operations 153 * 0x02: Classic Apple Mouse Protocol / 200 cpi operations 154 * we don't support handlers (at least): 155 * 0x03: Mouse systems A3 trackball 156 * 0x04: Extended Apple Mouse Protocol 157 * 0x2f: Microspeed mouse 158 * 0x42: Macally 159 * 0x5f: Microspeed mouse 160 * 0x66: Microspeed mouse 161 */ 162 if (buf[2] == 1 || buf[2] == 2) { 163 d->handler = buf[2]; 164 } 165 166 trace_adb_mouse_request_change_addr_and_handler( 167 d->devaddr, d->handler); 168 } 169 break; 170 } 171 } 172 break; 173 case ADB_READREG: 174 switch (reg) { 175 case 0: 176 olen = adb_mouse_poll(d, obuf); 177 break; 178 case 1: 179 break; 180 case 3: 181 obuf[0] = d->devaddr; 182 obuf[1] = d->handler; 183 olen = 2; 184 break; 185 } 186 trace_adb_mouse_readreg(reg, obuf[0], obuf[1]); 187 break; 188 } 189 return olen; 190 } 191 192 static void adb_mouse_reset(DeviceState *dev) 193 { 194 ADBDevice *d = ADB_DEVICE(dev); 195 MouseState *s = ADB_MOUSE(dev); 196 197 d->handler = 2; 198 d->devaddr = ADB_DEVID_MOUSE; 199 s->last_buttons_state = s->buttons_state = 0; 200 s->dx = s->dy = s->dz = 0; 201 } 202 203 static const VMStateDescription vmstate_adb_mouse = { 204 .name = "adb_mouse", 205 .version_id = 2, 206 .minimum_version_id = 2, 207 .fields = (VMStateField[]) { 208 VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device, 209 ADBDevice), 210 VMSTATE_INT32(buttons_state, MouseState), 211 VMSTATE_INT32(last_buttons_state, MouseState), 212 VMSTATE_INT32(dx, MouseState), 213 VMSTATE_INT32(dy, MouseState), 214 VMSTATE_INT32(dz, MouseState), 215 VMSTATE_END_OF_LIST() 216 } 217 }; 218 219 static void adb_mouse_realizefn(DeviceState *dev, Error **errp) 220 { 221 MouseState *s = ADB_MOUSE(dev); 222 ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev); 223 224 amc->parent_realize(dev, errp); 225 226 qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse"); 227 } 228 229 static void adb_mouse_initfn(Object *obj) 230 { 231 ADBDevice *d = ADB_DEVICE(obj); 232 233 d->devaddr = ADB_DEVID_MOUSE; 234 } 235 236 static void adb_mouse_class_init(ObjectClass *oc, void *data) 237 { 238 DeviceClass *dc = DEVICE_CLASS(oc); 239 ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc); 240 ADBMouseClass *amc = ADB_MOUSE_CLASS(oc); 241 242 device_class_set_parent_realize(dc, adb_mouse_realizefn, 243 &amc->parent_realize); 244 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 245 246 adc->devreq = adb_mouse_request; 247 dc->reset = adb_mouse_reset; 248 dc->vmsd = &vmstate_adb_mouse; 249 } 250 251 static const TypeInfo adb_mouse_type_info = { 252 .name = TYPE_ADB_MOUSE, 253 .parent = TYPE_ADB_DEVICE, 254 .instance_size = sizeof(MouseState), 255 .instance_init = adb_mouse_initfn, 256 .class_init = adb_mouse_class_init, 257 .class_size = sizeof(ADBMouseClass), 258 }; 259 260 static void adb_mouse_register_types(void) 261 { 262 type_register_static(&adb_mouse_type_info); 263 } 264 265 type_init(adb_mouse_register_types) 266