Syborg (Symbian Virtual Platform) board

A virtual reference platform for SymbianOS development/debugging.

Signed-off-by: Paul Brook <paul@codesourcery.com>

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)