root / hw / syborg_pointer.c @ e8ee28fb
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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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uint32_t 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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uint32_t 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 * const 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 * const 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 int 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(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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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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return 0; |
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} |
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static SysBusDeviceInfo syborg_pointer_info = {
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.init = syborg_pointer_init, |
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.qdev.name = "syborg,pointer",
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.qdev.size = sizeof(SyborgPointerState),
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.qdev.props = (Property[]) { |
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DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16), |
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DEFINE_PROP_UINT32("absolute", SyborgPointerState, absolute, 1), |
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DEFINE_PROP_END_OF_LIST(), |
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} |
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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_withprop(&syborg_pointer_info); |
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} |
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device_init(syborg_pointer_register_devices) |