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Syborg (Symbian Virtual Platform) board
A virtual reference platform for SymbianOS development/debugging. Signed-off-by: Paul Brook <paul@codesourcery.com>
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Paul Brook
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233
hw/syborg_pointer.c
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233
hw/syborg_pointer.c
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/*
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* Syborg pointing device (mouse/touchscreen)
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*
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* Copyright (c) 2008 CodeSourcery
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysbus.h"
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#include "console.h"
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#include "syborg.h"
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enum {
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POINTER_ID = 0,
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POINTER_LATCH = 1,
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POINTER_FIFO_COUNT = 2,
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POINTER_X = 3,
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POINTER_Y = 4,
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POINTER_Z = 5,
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POINTER_BUTTONS = 6,
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POINTER_INT_ENABLE = 7,
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POINTER_FIFO_SIZE = 8
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};
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typedef struct {
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int x, y, z, pointer_buttons;
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} event_data;
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typedef struct {
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SysBusDevice busdev;
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int int_enabled;
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int fifo_size;
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event_data *event_fifo;
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int read_pos, read_count;
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qemu_irq irq;
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int absolute;
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} SyborgPointerState;
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static void syborg_pointer_update(SyborgPointerState *s)
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{
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qemu_set_irq(s->irq, s->read_count && s->int_enabled);
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}
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static uint32_t syborg_pointer_read(void *opaque, target_phys_addr_t offset)
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{
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SyborgPointerState *s = (SyborgPointerState *)opaque;
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offset &= 0xfff;
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switch (offset >> 2) {
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case POINTER_ID:
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return s->absolute ? SYBORG_ID_TOUCHSCREEN : SYBORG_ID_MOUSE;
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case POINTER_FIFO_COUNT:
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return s->read_count;
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case POINTER_X:
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return s->event_fifo[s->read_pos].x;
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case POINTER_Y:
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return s->event_fifo[s->read_pos].y;
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case POINTER_Z:
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return s->event_fifo[s->read_pos].z;
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case POINTER_BUTTONS:
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return s->event_fifo[s->read_pos].pointer_buttons;
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case POINTER_INT_ENABLE:
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return s->int_enabled;
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case POINTER_FIFO_SIZE:
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return s->fifo_size;
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default:
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cpu_abort(cpu_single_env, "syborg_pointer_read: Bad offset %x\n",
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(int)offset);
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return 0;
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}
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}
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static void syborg_pointer_write(void *opaque, target_phys_addr_t offset,
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uint32_t value)
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{
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SyborgPointerState *s = (SyborgPointerState *)opaque;
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offset &= 0xfff;
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switch (offset >> 2) {
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case POINTER_LATCH:
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if (s->read_count > 0) {
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s->read_count--;
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if (++s->read_pos == s->fifo_size)
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s->read_pos = 0;
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}
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break;
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case POINTER_INT_ENABLE:
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s->int_enabled = value;
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break;
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default:
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cpu_abort(cpu_single_env, "syborg_pointer_write: Bad offset %x\n",
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(int)offset);
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}
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syborg_pointer_update(s);
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}
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static CPUReadMemoryFunc *syborg_pointer_readfn[] = {
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syborg_pointer_read,
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syborg_pointer_read,
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syborg_pointer_read
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};
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static CPUWriteMemoryFunc *syborg_pointer_writefn[] = {
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syborg_pointer_write,
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syborg_pointer_write,
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syborg_pointer_write
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};
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static void syborg_pointer_event(void *opaque, int dx, int dy, int dz,
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int buttons_state)
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{
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SyborgPointerState *s = (SyborgPointerState *)opaque;
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int slot = s->read_pos + s->read_count;
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/* This first FIFO entry is used to store current register state. */
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if (s->read_count < s->fifo_size - 1) {
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s->read_count++;
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slot++;
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}
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if (slot >= s->fifo_size)
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slot -= s->fifo_size;
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if (s->read_count == s->fifo_size && !s->absolute) {
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/* Merge existing entries. */
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s->event_fifo[slot].x += dx;
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s->event_fifo[slot].y += dy;
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s->event_fifo[slot].z += dz;
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} else {
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s->event_fifo[slot].x = dx;
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s->event_fifo[slot].y = dy;
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s->event_fifo[slot].z = dz;
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}
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s->event_fifo[slot].pointer_buttons = buttons_state;
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syborg_pointer_update(s);
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}
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static void syborg_pointer_save(QEMUFile *f, void *opaque)
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{
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SyborgPointerState *s = (SyborgPointerState *)opaque;
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int i;
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qemu_put_be32(f, s->fifo_size);
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qemu_put_be32(f, s->absolute);
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qemu_put_be32(f, s->int_enabled);
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qemu_put_be32(f, s->read_pos);
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qemu_put_be32(f, s->read_count);
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for (i = 0; i < s->fifo_size; i++) {
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qemu_put_be32(f, s->event_fifo[i].x);
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qemu_put_be32(f, s->event_fifo[i].y);
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qemu_put_be32(f, s->event_fifo[i].z);
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qemu_put_be32(f, s->event_fifo[i].pointer_buttons);
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}
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}
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static int syborg_pointer_load(QEMUFile *f, void *opaque, int version_id)
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{
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SyborgPointerState *s = (SyborgPointerState *)opaque;
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uint32_t val;
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int i;
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if (version_id != 1)
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return -EINVAL;
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val = qemu_get_be32(f);
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if (val != s->fifo_size)
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return -EINVAL;
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val = qemu_get_be32(f);
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if (val != s->absolute)
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return -EINVAL;
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s->int_enabled = qemu_get_be32(f);
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s->read_pos = qemu_get_be32(f);
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s->read_count = qemu_get_be32(f);
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for (i = 0; i < s->fifo_size; i++) {
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s->event_fifo[i].x = qemu_get_be32(f);
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s->event_fifo[i].y = qemu_get_be32(f);
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s->event_fifo[i].z = qemu_get_be32(f);
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s->event_fifo[i].pointer_buttons = qemu_get_be32(f);
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}
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return 0;
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}
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static void syborg_pointer_init(SysBusDevice *dev)
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{
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SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev);
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int iomemtype;
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sysbus_init_irq(dev, &s->irq);
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iomemtype = cpu_register_io_memory(0, syborg_pointer_readfn,
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syborg_pointer_writefn, s);
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sysbus_init_mmio(dev, 0x1000, iomemtype);
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s->absolute = qdev_get_prop_int(&dev->qdev, "absolute", 1);
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s->fifo_size = qdev_get_prop_int(&dev->qdev, "fifo-size", 16);
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if (s->fifo_size <= 0) {
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fprintf(stderr, "syborg_pointer: fifo too small\n");
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s->fifo_size = 16;
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}
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s->event_fifo = qemu_mallocz(s->fifo_size * sizeof(s->event_fifo[0]));
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qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute,
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"Syborg Pointer");
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register_savevm("syborg_pointer", -1, 1,
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syborg_pointer_save, syborg_pointer_load, s);
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}
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static void syborg_pointer_register_devices(void)
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{
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sysbus_register_dev("syborg,pointer", sizeof(SyborgPointerState),
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syborg_pointer_init);
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}
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device_init(syborg_pointer_register_devices)
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