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 trace_adb_mouse_flush(); 122 return 0; 123 } 124 125 cmd = buf[0] & 0xc; 126 reg = buf[0] & 0x3; 127 olen = 0; 128 switch (cmd) { 129 case ADB_WRITEREG: 130 trace_adb_mouse_writereg(reg, buf[1]); 131 switch (reg) { 132 case 2: 133 break; 134 case 3: 135 switch (buf[2]) { 136 case ADB_CMD_SELF_TEST: 137 break; 138 case ADB_CMD_CHANGE_ID: 139 case ADB_CMD_CHANGE_ID_AND_ACT: 140 case ADB_CMD_CHANGE_ID_AND_ENABLE: 141 d->devaddr = buf[1] & 0xf; 142 trace_adb_mouse_request_change_addr(d->devaddr); 143 break; 144 default: 145 d->devaddr = buf[1] & 0xf; 146 /* we support handlers: 147 * 0x01: Classic Apple Mouse Protocol / 100 cpi operations 148 * 0x02: Classic Apple Mouse Protocol / 200 cpi operations 149 * we don't support handlers (at least): 150 * 0x03: Mouse systems A3 trackball 151 * 0x04: Extended Apple Mouse Protocol 152 * 0x2f: Microspeed mouse 153 * 0x42: Macally 154 * 0x5f: Microspeed mouse 155 * 0x66: Microspeed mouse 156 */ 157 if (buf[2] == 1 || buf[2] == 2) { 158 d->handler = buf[2]; 159 } 160 161 trace_adb_mouse_request_change_addr_and_handler(d->devaddr, 162 d->handler); 163 break; 164 } 165 } 166 break; 167 case ADB_READREG: 168 switch (reg) { 169 case 0: 170 olen = adb_mouse_poll(d, obuf); 171 break; 172 case 1: 173 break; 174 case 3: 175 obuf[0] = d->handler; 176 obuf[1] = d->devaddr; 177 olen = 2; 178 break; 179 } 180 trace_adb_mouse_readreg(reg, obuf[0], obuf[1]); 181 break; 182 } 183 return olen; 184 } 185 186 static void adb_mouse_reset(DeviceState *dev) 187 { 188 ADBDevice *d = ADB_DEVICE(dev); 189 MouseState *s = ADB_MOUSE(dev); 190 191 d->handler = 2; 192 d->devaddr = ADB_DEVID_MOUSE; 193 s->last_buttons_state = s->buttons_state = 0; 194 s->dx = s->dy = s->dz = 0; 195 } 196 197 static const VMStateDescription vmstate_adb_mouse = { 198 .name = "adb_mouse", 199 .version_id = 2, 200 .minimum_version_id = 2, 201 .fields = (VMStateField[]) { 202 VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device, 203 ADBDevice), 204 VMSTATE_INT32(buttons_state, MouseState), 205 VMSTATE_INT32(last_buttons_state, MouseState), 206 VMSTATE_INT32(dx, MouseState), 207 VMSTATE_INT32(dy, MouseState), 208 VMSTATE_INT32(dz, MouseState), 209 VMSTATE_END_OF_LIST() 210 } 211 }; 212 213 static void adb_mouse_realizefn(DeviceState *dev, Error **errp) 214 { 215 MouseState *s = ADB_MOUSE(dev); 216 ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev); 217 218 amc->parent_realize(dev, errp); 219 220 qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse"); 221 } 222 223 static void adb_mouse_initfn(Object *obj) 224 { 225 ADBDevice *d = ADB_DEVICE(obj); 226 227 d->devaddr = ADB_DEVID_MOUSE; 228 } 229 230 static void adb_mouse_class_init(ObjectClass *oc, void *data) 231 { 232 DeviceClass *dc = DEVICE_CLASS(oc); 233 ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc); 234 ADBMouseClass *amc = ADB_MOUSE_CLASS(oc); 235 236 device_class_set_parent_realize(dc, adb_mouse_realizefn, 237 &amc->parent_realize); 238 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 239 240 adc->devreq = adb_mouse_request; 241 dc->reset = adb_mouse_reset; 242 dc->vmsd = &vmstate_adb_mouse; 243 } 244 245 static const TypeInfo adb_mouse_type_info = { 246 .name = TYPE_ADB_MOUSE, 247 .parent = TYPE_ADB_DEVICE, 248 .instance_size = sizeof(MouseState), 249 .instance_init = adb_mouse_initfn, 250 .class_init = adb_mouse_class_init, 251 .class_size = sizeof(ADBMouseClass), 252 }; 253 254 static void adb_mouse_register_types(void) 255 { 256 type_register_static(&adb_mouse_type_info); 257 } 258 259 type_init(adb_mouse_register_types) 260