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 if (!d->disable_direct_reg3_writes) { 146 d->devaddr = buf[1] & 0xf; 147 148 /* we support handlers: 149 * 0x01: Classic Apple Mouse Protocol / 100 cpi operations 150 * 0x02: Classic Apple Mouse Protocol / 200 cpi operations 151 * we don't support handlers (at least): 152 * 0x03: Mouse systems A3 trackball 153 * 0x04: Extended Apple Mouse Protocol 154 * 0x2f: Microspeed mouse 155 * 0x42: Macally 156 * 0x5f: Microspeed mouse 157 * 0x66: Microspeed mouse 158 */ 159 if (buf[2] == 1 || buf[2] == 2) { 160 d->handler = buf[2]; 161 } 162 163 trace_adb_mouse_request_change_addr_and_handler( 164 d->devaddr, d->handler); 165 } 166 break; 167 } 168 } 169 break; 170 case ADB_READREG: 171 switch (reg) { 172 case 0: 173 olen = adb_mouse_poll(d, obuf); 174 break; 175 case 1: 176 break; 177 case 3: 178 obuf[0] = d->devaddr; 179 obuf[1] = d->handler; 180 olen = 2; 181 break; 182 } 183 trace_adb_mouse_readreg(reg, obuf[0], obuf[1]); 184 break; 185 } 186 return olen; 187 } 188 189 static void adb_mouse_reset(DeviceState *dev) 190 { 191 ADBDevice *d = ADB_DEVICE(dev); 192 MouseState *s = ADB_MOUSE(dev); 193 194 d->handler = 2; 195 d->devaddr = ADB_DEVID_MOUSE; 196 s->last_buttons_state = s->buttons_state = 0; 197 s->dx = s->dy = s->dz = 0; 198 } 199 200 static const VMStateDescription vmstate_adb_mouse = { 201 .name = "adb_mouse", 202 .version_id = 2, 203 .minimum_version_id = 2, 204 .fields = (VMStateField[]) { 205 VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device, 206 ADBDevice), 207 VMSTATE_INT32(buttons_state, MouseState), 208 VMSTATE_INT32(last_buttons_state, MouseState), 209 VMSTATE_INT32(dx, MouseState), 210 VMSTATE_INT32(dy, MouseState), 211 VMSTATE_INT32(dz, MouseState), 212 VMSTATE_END_OF_LIST() 213 } 214 }; 215 216 static void adb_mouse_realizefn(DeviceState *dev, Error **errp) 217 { 218 MouseState *s = ADB_MOUSE(dev); 219 ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev); 220 221 amc->parent_realize(dev, errp); 222 223 qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse"); 224 } 225 226 static void adb_mouse_initfn(Object *obj) 227 { 228 ADBDevice *d = ADB_DEVICE(obj); 229 230 d->devaddr = ADB_DEVID_MOUSE; 231 } 232 233 static void adb_mouse_class_init(ObjectClass *oc, void *data) 234 { 235 DeviceClass *dc = DEVICE_CLASS(oc); 236 ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc); 237 ADBMouseClass *amc = ADB_MOUSE_CLASS(oc); 238 239 device_class_set_parent_realize(dc, adb_mouse_realizefn, 240 &amc->parent_realize); 241 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 242 243 adc->devreq = adb_mouse_request; 244 dc->reset = adb_mouse_reset; 245 dc->vmsd = &vmstate_adb_mouse; 246 } 247 248 static const TypeInfo adb_mouse_type_info = { 249 .name = TYPE_ADB_MOUSE, 250 .parent = TYPE_ADB_DEVICE, 251 .instance_size = sizeof(MouseState), 252 .instance_init = adb_mouse_initfn, 253 .class_init = adb_mouse_class_init, 254 .class_size = sizeof(ADBMouseClass), 255 }; 256 257 static void adb_mouse_register_types(void) 258 { 259 type_register_static(&adb_mouse_type_info); 260 } 261 262 type_init(adb_mouse_register_types) 263