/*
* 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"
#define ADB_MOUSE(obj) OBJECT_CHECK(MouseState, (obj), TYPE_ADB_MOUSE)
typedef struct MouseState {
/*< public >*/
ADBDevice parent_obj;
/*< private >*/
int buttons_state, last_buttons_state;
int dx, dy, dz;
} MouseState;
#define ADB_MOUSE_CLASS(class) \
OBJECT_CLASS_CHECK(ADBMouseClass, (class), TYPE_ADB_MOUSE)
#define ADB_MOUSE_GET_CLASS(obj) \
OBJECT_GET_CLASS(ADBMouseClass, (obj), TYPE_ADB_MOUSE)
typedef struct ADBMouseClass {
/*< public >*/
ADBDeviceClass parent_class;
/*< private >*/
DeviceRealize parent_realize;
} ADBMouseClass;
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_mouse_flush();
return 0;
}
cmd = buf[0] & 0xc;
reg = buf[0] & 0x3;
olen = 0;
switch (cmd) {
case ADB_WRITEREG:
trace_adb_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_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_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_mouse_readreg(reg, obuf[0], obuf[1]);
break;
}
return olen;
}
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;
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)
