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 #include "qemu/osdep.h" 25 #include "ui/console.h" 26 #include "hw/input/adb.h" 27 #include "adb-internal.h" 28 #include "trace.h" 29 30 #define ADB_MOUSE(obj) OBJECT_CHECK(MouseState, (obj), TYPE_ADB_MOUSE) 31 32 typedef struct MouseState { 33 /*< public >*/ 34 ADBDevice parent_obj; 35 /*< private >*/ 36 37 int buttons_state, last_buttons_state; 38 int dx, dy, dz; 39 } MouseState; 40 41 #define ADB_MOUSE_CLASS(class) \ 42 OBJECT_CLASS_CHECK(ADBMouseClass, (class), TYPE_ADB_MOUSE) 43 #define ADB_MOUSE_GET_CLASS(obj) \ 44 OBJECT_GET_CLASS(ADBMouseClass, (obj), TYPE_ADB_MOUSE) 45 46 typedef struct ADBMouseClass { 47 /*< public >*/ 48 ADBDeviceClass parent_class; 49 /*< private >*/ 50 51 DeviceRealize parent_realize; 52 } ADBMouseClass; 53 54 static void adb_mouse_event(void *opaque, 55 int dx1, int dy1, int dz1, int buttons_state) 56 { 57 MouseState *s = opaque; 58 59 s->dx += dx1; 60 s->dy += dy1; 61 s->dz += dz1; 62 s->buttons_state = buttons_state; 63 } 64 65 66 static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf) 67 { 68 MouseState *s = ADB_MOUSE(d); 69 int dx, dy; 70 71 if (s->last_buttons_state == s->buttons_state && 72 s->dx == 0 && s->dy == 0) { 73 return 0; 74 } 75 76 dx = s->dx; 77 if (dx < -63) { 78 dx = -63; 79 } else if (dx > 63) { 80 dx = 63; 81 } 82 83 dy = s->dy; 84 if (dy < -63) { 85 dy = -63; 86 } else if (dy > 63) { 87 dy = 63; 88 } 89 90 s->dx -= dx; 91 s->dy -= dy; 92 s->last_buttons_state = s->buttons_state; 93 94 dx &= 0x7f; 95 dy &= 0x7f; 96 97 if (!(s->buttons_state & MOUSE_EVENT_LBUTTON)) { 98 dy |= 0x80; 99 } 100 if (!(s->buttons_state & MOUSE_EVENT_RBUTTON)) { 101 dx |= 0x80; 102 } 103 104 obuf[0] = dy; 105 obuf[1] = dx; 106 return 2; 107 } 108 109 static int adb_mouse_request(ADBDevice *d, uint8_t *obuf, 110 const uint8_t *buf, int len) 111 { 112 MouseState *s = ADB_MOUSE(d); 113 int cmd, reg, olen; 114 115 if ((buf[0] & 0x0f) == ADB_FLUSH) { 116 /* flush mouse fifo */ 117 s->buttons_state = s->last_buttons_state; 118 s->dx = 0; 119 s->dy = 0; 120 s->dz = 0; 121 return 0; 122 } 123 124 cmd = buf[0] & 0xc; 125 reg = buf[0] & 0x3; 126 olen = 0; 127 switch (cmd) { 128 case ADB_WRITEREG: 129 trace_adb_mouse_writereg(reg, buf[1]); 130 switch (reg) { 131 case 2: 132 break; 133 case 3: 134 switch (buf[2]) { 135 case ADB_CMD_SELF_TEST: 136 break; 137 case ADB_CMD_CHANGE_ID: 138 case ADB_CMD_CHANGE_ID_AND_ACT: 139 case ADB_CMD_CHANGE_ID_AND_ENABLE: 140 d->devaddr = buf[1] & 0xf; 141 break; 142 default: 143 d->devaddr = buf[1] & 0xf; 144 /* we support handlers: 145 * 0x01: Classic Apple Mouse Protocol / 100 cpi operations 146 * 0x02: Classic Apple Mouse Protocol / 200 cpi operations 147 * we don't support handlers (at least): 148 * 0x03: Mouse systems A3 trackball 149 * 0x04: Extended Apple Mouse Protocol 150 * 0x2f: Microspeed mouse 151 * 0x42: Macally 152 * 0x5f: Microspeed mouse 153 * 0x66: Microspeed mouse 154 */ 155 if (buf[2] == 1 || buf[2] == 2) { 156 d->handler = buf[2]; 157 } 158 break; 159 } 160 } 161 break; 162 case ADB_READREG: 163 switch (reg) { 164 case 0: 165 olen = adb_mouse_poll(d, obuf); 166 break; 167 case 1: 168 break; 169 case 3: 170 obuf[0] = d->handler; 171 obuf[1] = d->devaddr; 172 olen = 2; 173 break; 174 } 175 trace_adb_mouse_readreg(reg, obuf[0], obuf[1]); 176 break; 177 } 178 return olen; 179 } 180 181 static void adb_mouse_reset(DeviceState *dev) 182 { 183 ADBDevice *d = ADB_DEVICE(dev); 184 MouseState *s = ADB_MOUSE(dev); 185 186 d->handler = 2; 187 d->devaddr = ADB_DEVID_MOUSE; 188 s->last_buttons_state = s->buttons_state = 0; 189 s->dx = s->dy = s->dz = 0; 190 } 191 192 static const VMStateDescription vmstate_adb_mouse = { 193 .name = "adb_mouse", 194 .version_id = 2, 195 .minimum_version_id = 2, 196 .fields = (VMStateField[]) { 197 VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device, 198 ADBDevice), 199 VMSTATE_INT32(buttons_state, MouseState), 200 VMSTATE_INT32(last_buttons_state, MouseState), 201 VMSTATE_INT32(dx, MouseState), 202 VMSTATE_INT32(dy, MouseState), 203 VMSTATE_INT32(dz, MouseState), 204 VMSTATE_END_OF_LIST() 205 } 206 }; 207 208 static void adb_mouse_realizefn(DeviceState *dev, Error **errp) 209 { 210 MouseState *s = ADB_MOUSE(dev); 211 ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev); 212 213 amc->parent_realize(dev, errp); 214 215 qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse"); 216 } 217 218 static void adb_mouse_initfn(Object *obj) 219 { 220 ADBDevice *d = ADB_DEVICE(obj); 221 222 d->devaddr = ADB_DEVID_MOUSE; 223 } 224 225 static void adb_mouse_class_init(ObjectClass *oc, void *data) 226 { 227 DeviceClass *dc = DEVICE_CLASS(oc); 228 ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc); 229 ADBMouseClass *amc = ADB_MOUSE_CLASS(oc); 230 231 amc->parent_realize = dc->realize; 232 dc->realize = adb_mouse_realizefn; 233 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 234 235 adc->devreq = adb_mouse_request; 236 dc->reset = adb_mouse_reset; 237 dc->vmsd = &vmstate_adb_mouse; 238 } 239 240 static const TypeInfo adb_mouse_type_info = { 241 .name = TYPE_ADB_MOUSE, 242 .parent = TYPE_ADB_DEVICE, 243 .instance_size = sizeof(MouseState), 244 .instance_init = adb_mouse_initfn, 245 .class_init = adb_mouse_class_init, 246 .class_size = sizeof(ADBMouseClass), 247 }; 248 249 static void adb_mouse_register_types(void) 250 { 251 type_register_static(&adb_mouse_type_info); 252 } 253 254 type_init(adb_mouse_register_types) 255