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/*
* Syborg pointing device (mouse/touchscreen)
*
* Copyright (c) 2008 CodeSourcery
*
* 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 "sysbus.h"
#include "console.h"
#include "syborg.h"
enum {
POINTER_ID = 0,
POINTER_LATCH = 1,
POINTER_FIFO_COUNT = 2,
POINTER_X = 3,
POINTER_Y = 4,
POINTER_Z = 5,
POINTER_BUTTONS = 6,
POINTER_INT_ENABLE = 7,
POINTER_FIFO_SIZE = 8
};
typedef struct {
int x, y, z, pointer_buttons;
} event_data;
typedef struct {
SysBusDevice busdev;
MemoryRegion iomem;
int int_enabled;
uint32_t fifo_size;
event_data *event_fifo;
int read_pos, read_count;
qemu_irq irq;
uint32_t absolute;
} SyborgPointerState;
static void syborg_pointer_update(SyborgPointerState *s)
{
qemu_set_irq(s->irq, s->read_count && s->int_enabled);
}
static uint64_t syborg_pointer_read(void *opaque, target_phys_addr_t offset,
unsigned size)
{
SyborgPointerState *s = (SyborgPointerState *)opaque;
offset &= 0xfff;
switch (offset >> 2) {
case POINTER_ID:
return s->absolute ? SYBORG_ID_TOUCHSCREEN : SYBORG_ID_MOUSE;
case POINTER_FIFO_COUNT:
return s->read_count;
case POINTER_X:
return s->event_fifo[s->read_pos].x;
case POINTER_Y:
return s->event_fifo[s->read_pos].y;
case POINTER_Z:
return s->event_fifo[s->read_pos].z;
case POINTER_BUTTONS:
return s->event_fifo[s->read_pos].pointer_buttons;
case POINTER_INT_ENABLE:
return s->int_enabled;
case POINTER_FIFO_SIZE:
return s->fifo_size;
default:
cpu_abort(cpu_single_env, "syborg_pointer_read: Bad offset %x\n",
(int)offset);
return 0;
}
}
static void syborg_pointer_write(void *opaque, target_phys_addr_t offset,
uint64_t value, unsigned size)
{
SyborgPointerState *s = (SyborgPointerState *)opaque;
offset &= 0xfff;
switch (offset >> 2) {
case POINTER_LATCH:
if (s->read_count > 0) {
s->read_count--;
if (++s->read_pos == s->fifo_size)
s->read_pos = 0;
}
break;
case POINTER_INT_ENABLE:
s->int_enabled = value;
break;
default:
cpu_abort(cpu_single_env, "syborg_pointer_write: Bad offset %x\n",
(int)offset);
}
syborg_pointer_update(s);
}
static const MemoryRegionOps syborg_pointer_ops = {
.read = syborg_pointer_read,
.write = syborg_pointer_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void syborg_pointer_event(void *opaque, int dx, int dy, int dz,
int buttons_state)
{
SyborgPointerState *s = (SyborgPointerState *)opaque;
int slot = s->read_pos + s->read_count;
/* This first FIFO entry is used to store current register state. */
if (s->read_count < s->fifo_size - 1) {
s->read_count++;
slot++;
}
if (slot >= s->fifo_size)
slot -= s->fifo_size;
if (s->read_count == s->fifo_size && !s->absolute) {
/* Merge existing entries. */
s->event_fifo[slot].x += dx;
s->event_fifo[slot].y += dy;
s->event_fifo[slot].z += dz;
} else {
s->event_fifo[slot].x = dx;
s->event_fifo[slot].y = dy;
s->event_fifo[slot].z = dz;
}
s->event_fifo[slot].pointer_buttons = buttons_state;
syborg_pointer_update(s);
}
static const VMStateDescription vmstate_event_data = {
.name = "dbma_channel",
.version_id = 0,
.minimum_version_id = 0,
.minimum_version_id_old = 0,
.fields = (VMStateField[]) {
VMSTATE_INT32(x, event_data),
VMSTATE_INT32(y, event_data),
VMSTATE_INT32(z, event_data),
VMSTATE_INT32(pointer_buttons, event_data),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_syborg_pointer = {
.name = "syborg_pointer",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_EQUAL(fifo_size, SyborgPointerState),
VMSTATE_UINT32_EQUAL(absolute, SyborgPointerState),
VMSTATE_INT32(int_enabled, SyborgPointerState),
VMSTATE_INT32(read_pos, SyborgPointerState),
VMSTATE_INT32(read_count, SyborgPointerState),
VMSTATE_STRUCT_VARRAY_UINT32(event_fifo, SyborgPointerState, fifo_size,
1, vmstate_event_data, event_data),
VMSTATE_END_OF_LIST()
}
};
static int syborg_pointer_init(SysBusDevice *dev)
{
SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev);
sysbus_init_irq(dev, &s->irq);
memory_region_init_io(&s->iomem, &syborg_pointer_ops, s,
"pointer", 0x1000);
sysbus_init_mmio_region(dev, &s->iomem);
if (s->fifo_size <= 0) {
fprintf(stderr, "syborg_pointer: fifo too small\n");
s->fifo_size = 16;
}
s->event_fifo = g_malloc0(s->fifo_size * sizeof(s->event_fifo[0]));
qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute,
"Syborg Pointer");
vmstate_register(&dev->qdev, -1, &vmstate_syborg_pointer, s);
return 0;
}
static SysBusDeviceInfo syborg_pointer_info = {
.init = syborg_pointer_init,
.qdev.name = "syborg,pointer",
.qdev.size = sizeof(SyborgPointerState),
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16),
DEFINE_PROP_UINT32("absolute", SyborgPointerState, absolute, 1),
DEFINE_PROP_END_OF_LIST(),
}
};
static void syborg_pointer_register_devices(void)
{
sysbus_register_withprop(&syborg_pointer_info);
}
device_init(syborg_pointer_register_devices)
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