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-rw-r--r--hw/syborg_pointer.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/hw/syborg_pointer.c b/hw/syborg_pointer.c
new file mode 100644
index 0000000000..e5a72d3cda
--- /dev/null
+++ b/hw/syborg_pointer.c
@@ -0,0 +1,233 @@
+/*
+ * 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;
+ int int_enabled;
+ int fifo_size;
+ event_data *event_fifo;
+ int read_pos, read_count;
+ qemu_irq irq;
+ int absolute;
+} SyborgPointerState;
+
+static void syborg_pointer_update(SyborgPointerState *s)
+{
+ qemu_set_irq(s->irq, s->read_count && s->int_enabled);
+}
+
+static uint32_t syborg_pointer_read(void *opaque, target_phys_addr_t offset)
+{
+ 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,
+ uint32_t value)
+{
+ 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 CPUReadMemoryFunc *syborg_pointer_readfn[] = {
+ syborg_pointer_read,
+ syborg_pointer_read,
+ syborg_pointer_read
+};
+
+static CPUWriteMemoryFunc *syborg_pointer_writefn[] = {
+ syborg_pointer_write,
+ syborg_pointer_write,
+ syborg_pointer_write
+};
+
+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 void syborg_pointer_save(QEMUFile *f, void *opaque)
+{
+ SyborgPointerState *s = (SyborgPointerState *)opaque;
+ int i;
+
+ qemu_put_be32(f, s->fifo_size);
+ qemu_put_be32(f, s->absolute);
+ qemu_put_be32(f, s->int_enabled);
+ qemu_put_be32(f, s->read_pos);
+ qemu_put_be32(f, s->read_count);
+ for (i = 0; i < s->fifo_size; i++) {
+ qemu_put_be32(f, s->event_fifo[i].x);
+ qemu_put_be32(f, s->event_fifo[i].y);
+ qemu_put_be32(f, s->event_fifo[i].z);
+ qemu_put_be32(f, s->event_fifo[i].pointer_buttons);
+ }
+}
+
+static int syborg_pointer_load(QEMUFile *f, void *opaque, int version_id)
+{
+ SyborgPointerState *s = (SyborgPointerState *)opaque;
+ uint32_t val;
+ int i;
+
+ if (version_id != 1)
+ return -EINVAL;
+
+ val = qemu_get_be32(f);
+ if (val != s->fifo_size)
+ return -EINVAL;
+
+ val = qemu_get_be32(f);
+ if (val != s->absolute)
+ return -EINVAL;
+
+ s->int_enabled = qemu_get_be32(f);
+ s->read_pos = qemu_get_be32(f);
+ s->read_count = qemu_get_be32(f);
+ for (i = 0; i < s->fifo_size; i++) {
+ s->event_fifo[i].x = qemu_get_be32(f);
+ s->event_fifo[i].y = qemu_get_be32(f);
+ s->event_fifo[i].z = qemu_get_be32(f);
+ s->event_fifo[i].pointer_buttons = qemu_get_be32(f);
+ }
+ return 0;
+}
+
+static void syborg_pointer_init(SysBusDevice *dev)
+{
+ SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev);
+ int iomemtype;
+
+ sysbus_init_irq(dev, &s->irq);
+ iomemtype = cpu_register_io_memory(0, syborg_pointer_readfn,
+ syborg_pointer_writefn, s);
+ sysbus_init_mmio(dev, 0x1000, iomemtype);
+
+ s->absolute = qdev_get_prop_int(&dev->qdev, "absolute", 1);
+ s->fifo_size = qdev_get_prop_int(&dev->qdev, "fifo-size", 16);
+ if (s->fifo_size <= 0) {
+ fprintf(stderr, "syborg_pointer: fifo too small\n");
+ s->fifo_size = 16;
+ }
+ s->event_fifo = qemu_mallocz(s->fifo_size * sizeof(s->event_fifo[0]));
+
+ qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute,
+ "Syborg Pointer");
+
+ register_savevm("syborg_pointer", -1, 1,
+ syborg_pointer_save, syborg_pointer_load, s);
+}
+
+static void syborg_pointer_register_devices(void)
+{
+ sysbus_register_dev("syborg,pointer", sizeof(SyborgPointerState),
+ syborg_pointer_init);
+}
+
+device_init(syborg_pointer_register_devices)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-15 22:57:47 +0000