qemu

adb-mouse.c (7657B)

---

 /*
  * QEMU ADB mouse support
  *
  * Copyright (c) 2004 Fabrice Bellard
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
 
 #include "qemu/osdep.h"
 #include "ui/console.h"
 #include "hw/input/adb.h"
 #include "migration/vmstate.h"
 #include "qemu/module.h"
 #include "adb-internal.h"
 #include "trace.h"
 #include "qom/object.h"
 
 OBJECT_DECLARE_TYPE(MouseState, ADBMouseClass, ADB_MOUSE)
 
 struct MouseState {
     /*< public >*/
     ADBDevice parent_obj;
     /*< private >*/
 
     int buttons_state, last_buttons_state;
     int dx, dy, dz;
 };
 
 
 struct ADBMouseClass {
     /*< public >*/
     ADBDeviceClass parent_class;
     /*< private >*/
 
     DeviceRealize parent_realize;
 };
 
 static void adb_mouse_event(void *opaque,
                             int dx1, int dy1, int dz1, int buttons_state)
 {
     MouseState *s = opaque;
 
     s->dx += dx1;
     s->dy += dy1;
     s->dz += dz1;
     s->buttons_state = buttons_state;
 }
 
 
 static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf)
 {
     MouseState *s = ADB_MOUSE(d);
     int dx, dy;
 
     if (s->last_buttons_state == s->buttons_state &&
         s->dx == 0 && s->dy == 0) {
         return 0;
     }
 
     dx = s->dx;
     if (dx < -63) {
         dx = -63;
     } else if (dx > 63) {
         dx = 63;
     }
 
     dy = s->dy;
     if (dy < -63) {
         dy = -63;
     } else if (dy > 63) {
         dy = 63;
     }
 
     s->dx -= dx;
     s->dy -= dy;
     s->last_buttons_state = s->buttons_state;
 
     dx &= 0x7f;
     dy &= 0x7f;
 
     if (!(s->buttons_state & MOUSE_EVENT_LBUTTON)) {
         dy |= 0x80;
     }
     if (!(s->buttons_state & MOUSE_EVENT_RBUTTON)) {
         dx |= 0x80;
     }
 
     obuf[0] = dy;
     obuf[1] = dx;
     return 2;
 }
 
 static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
                              const uint8_t *buf, int len)
 {
     MouseState *s = ADB_MOUSE(d);
     int cmd, reg, olen;
 
     if ((buf[0] & 0x0f) == ADB_FLUSH) {
         /* flush mouse fifo */
         s->buttons_state = s->last_buttons_state;
         s->dx = 0;
         s->dy = 0;
         s->dz = 0;
         trace_adb_device_mouse_flush();
         return 0;
     }
 
     cmd = buf[0] & 0xc;
     reg = buf[0] & 0x3;
     olen = 0;
     switch (cmd) {
     case ADB_WRITEREG:
         trace_adb_device_mouse_writereg(reg, buf[1]);
         switch (reg) {
         case 2:
             break;
         case 3:
             /*
              * MacOS 9 has a bug in its ADB driver whereby after configuring
              * the ADB bus devices it sends another write of invalid length
              * to reg 3. Make sure we ignore it to prevent an address clash
              * with the previous device.
              */
             if (len != 3) {
                 return 0;
             }
 
             switch (buf[2]) {
             case ADB_CMD_SELF_TEST:
                 break;
             case ADB_CMD_CHANGE_ID:
             case ADB_CMD_CHANGE_ID_AND_ACT:
             case ADB_CMD_CHANGE_ID_AND_ENABLE:
                 d->devaddr = buf[1] & 0xf;
                 trace_adb_device_mouse_request_change_addr(d->devaddr);
                 break;
             default:
                 d->devaddr = buf[1] & 0xf;
                 /*
                  * we support handlers:
                  * 0x01: Classic Apple Mouse Protocol / 100 cpi operations
                  * 0x02: Classic Apple Mouse Protocol / 200 cpi operations
                  * we don't support handlers (at least):
                  * 0x03: Mouse systems A3 trackball
                  * 0x04: Extended Apple Mouse Protocol
                  * 0x2f: Microspeed mouse
                  * 0x42: Macally
                  * 0x5f: Microspeed mouse
                  * 0x66: Microspeed mouse
                  */
                 if (buf[2] == 1 || buf[2] == 2) {
                     d->handler = buf[2];
                 }
 
                 trace_adb_device_mouse_request_change_addr_and_handler(
                     d->devaddr, d->handler);
                 break;
             }
         }
         break;
     case ADB_READREG:
         switch (reg) {
         case 0:
             olen = adb_mouse_poll(d, obuf);
             break;
         case 1:
             break;
         case 3:
             obuf[0] = d->devaddr;
             obuf[1] = d->handler;
             olen = 2;
             break;
         }
         trace_adb_device_mouse_readreg(reg, obuf[0], obuf[1]);
         break;
     }
     return olen;
 }
 
 static bool adb_mouse_has_data(ADBDevice *d)
 {
     MouseState *s = ADB_MOUSE(d);
 
     return !(s->last_buttons_state == s->buttons_state &&
              s->dx == 0 && s->dy == 0);
 }
 
 static void adb_mouse_reset(DeviceState *dev)
 {
     ADBDevice *d = ADB_DEVICE(dev);
     MouseState *s = ADB_MOUSE(dev);
 
     d->handler = 2;
     d->devaddr = ADB_DEVID_MOUSE;
     s->last_buttons_state = s->buttons_state = 0;
     s->dx = s->dy = s->dz = 0;
 }
 
 static const VMStateDescription vmstate_adb_mouse = {
     .name = "adb_mouse",
     .version_id = 2,
     .minimum_version_id = 2,
     .fields = (VMStateField[]) {
         VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device,
                        ADBDevice),
         VMSTATE_INT32(buttons_state, MouseState),
         VMSTATE_INT32(last_buttons_state, MouseState),
         VMSTATE_INT32(dx, MouseState),
         VMSTATE_INT32(dy, MouseState),
         VMSTATE_INT32(dz, MouseState),
         VMSTATE_END_OF_LIST()
     }
 };
 
 static void adb_mouse_realizefn(DeviceState *dev, Error **errp)
 {
     MouseState *s = ADB_MOUSE(dev);
     ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev);
 
     amc->parent_realize(dev, errp);
 
     qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse");
 }
 
 static void adb_mouse_initfn(Object *obj)
 {
     ADBDevice *d = ADB_DEVICE(obj);
 
     d->devaddr = ADB_DEVID_MOUSE;
 }
 
 static void adb_mouse_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
     ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
     ADBMouseClass *amc = ADB_MOUSE_CLASS(oc);
 
     device_class_set_parent_realize(dc, adb_mouse_realizefn,
                                     &amc->parent_realize);
     set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
 
     adc->devreq = adb_mouse_request;
     adc->devhasdata = adb_mouse_has_data;
     dc->reset = adb_mouse_reset;
     dc->vmsd = &vmstate_adb_mouse;
 }
 
 static const TypeInfo adb_mouse_type_info = {
     .name = TYPE_ADB_MOUSE,
     .parent = TYPE_ADB_DEVICE,
     .instance_size = sizeof(MouseState),
     .instance_init = adb_mouse_initfn,
     .class_init = adb_mouse_class_init,
     .class_size = sizeof(ADBMouseClass),
 };
 
 static void adb_mouse_register_types(void)
 {
     type_register_static(&adb_mouse_type_info);
 }
 
 type_init(adb_mouse_register_types)