Syborg (Symbian Virtual Platform) board

A virtual reference platform for SymbianOS development/debugging.

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

hw/syborg_keyboard.c

@@ -0,0 +1,234 @@
+/*
+ * Syborg keyboard controller.
+ *
+ * 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"
+
+//#define DEBUG_SYBORG_KEYBOARD
+
+#ifdef DEBUG_SYBORG_KEYBOARD
+#define DPRINTF(fmt, ...) \
+do { printf("syborg_keyboard: " fmt , ##args); } while (0)
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "syborg_keyboard: error: " fmt , ## __VA_ARGS__); \
+    exit(1);} while (0)
+#else
+#define DPRINTF(fmt, ...) do {} while(0)
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "syborg_keyboard: error: " fmt , ## __VA_ARGS__); \
+} while (0)
+#endif
+
+enum {
+    KBD_ID          = 0,
+    KBD_DATA        = 1,
+    KBD_FIFO_COUNT  = 2,
+    KBD_INT_ENABLE  = 3,
+    KBD_FIFO_SIZE   = 4
+};
+
+typedef struct {
+    SysBusDevice busdev;
+    int int_enabled;
+    int extension_bit;
+    int fifo_size;
+    uint32_t *key_fifo;
+    int read_pos, read_count;
+    qemu_irq irq;
+} SyborgKeyboardState;
+
+static void syborg_keyboard_update(SyborgKeyboardState *s)
+{
+    int level = s->read_count && s->int_enabled;
+    DPRINTF("Update IRQ %d\n", level);
+    qemu_set_irq(s->irq, level);
+}
+
+static uint32_t syborg_keyboard_read(void *opaque, target_phys_addr_t offset)
+{
+    SyborgKeyboardState *s = (SyborgKeyboardState *)opaque;
+    int c;
+
+    DPRINTF("reg read %d\n", (int)offset);
+    offset &= 0xfff;
+    switch (offset >> 2) {
+    case KBD_ID:
+        return SYBORG_ID_KEYBOARD;
+    case KBD_FIFO_COUNT:
+        return s->read_count;
+    case KBD_DATA:
+        if (s->read_count == 0) {
+            c = -1;
+            DPRINTF("FIFO underflow\n");
+        } else {
+            c = s->key_fifo[s->read_pos];
+            DPRINTF("FIFO read 0x%x\n", c);
+            s->read_count--;
+            s->read_pos++;
+            if (s->read_pos == s->fifo_size)
+                s->read_pos = 0;
+        }
+        syborg_keyboard_update(s);
+        return c;
+    case KBD_INT_ENABLE:
+        return s->int_enabled;
+    case KBD_FIFO_SIZE:
+        return s->fifo_size;
+    default:
+        cpu_abort(cpu_single_env, "syborg_keyboard_read: Bad offset %x\n",
+                  (int)offset);
+        return 0;
+    }
+}
+
+static void syborg_keyboard_write(void *opaque, target_phys_addr_t offset,
+                                  uint32_t value)
+{
+    SyborgKeyboardState *s = (SyborgKeyboardState *)opaque;
+
+    DPRINTF("reg write %d\n", (int)offset);
+    offset &= 0xfff;
+    switch (offset >> 2) {
+    case KBD_INT_ENABLE:
+        s->int_enabled = value;
+        syborg_keyboard_update(s);
+        break;
+    default:
+        cpu_abort(cpu_single_env, "syborg_keyboard_write: Bad offset %x\n",
+                  (int)offset);
+    }
+}
+
+static CPUReadMemoryFunc *syborg_keyboard_readfn[] = {
+     syborg_keyboard_read,
+     syborg_keyboard_read,
+     syborg_keyboard_read
+};
+
+static CPUWriteMemoryFunc *syborg_keyboard_writefn[] = {
+     syborg_keyboard_write,
+     syborg_keyboard_write,
+     syborg_keyboard_write
+};
+
+static void syborg_keyboard_event(void *opaque, int keycode)
+{
+    SyborgKeyboardState *s = (SyborgKeyboardState *)opaque;
+    int slot;
+    uint32_t val;
+
+    /* Strip off 0xe0 prefixes and reconstruct the full scancode.  */
+    if (keycode == 0xe0 && !s->extension_bit) {
+        DPRINTF("Extension bit\n");
+        s->extension_bit = 0x80;
+        return;
+    }
+    val = (keycode & 0x7f) | s->extension_bit;
+    if (keycode & 0x80)
+        val |= 0x80000000u;
+    s->extension_bit = 0;
+
+    DPRINTF("FIFO push 0x%x\n", val);
+    slot = s->read_pos + s->read_count;
+    if (slot >= s->fifo_size)
+        slot -= s->fifo_size;
+
+    if (s->read_count < s->fifo_size) {
+        s->read_count++;
+        s->key_fifo[slot] = val;
+    } else {
+        fprintf(stderr, "syborg_keyboard error! FIFO overflow\n");
+    }
+
+    syborg_keyboard_update(s);
+}
+
+static void syborg_keyboard_save(QEMUFile *f, void *opaque)
+{
+    SyborgKeyboardState *s = (SyborgKeyboardState *)opaque;
+    int i;
+
+    qemu_put_be32(f, s->fifo_size);
+    qemu_put_be32(f, s->int_enabled);
+    qemu_put_be32(f, s->extension_bit);
+    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->key_fifo[i]);
+    }
+}
+
+static int syborg_keyboard_load(QEMUFile *f, void *opaque, int version_id)
+{
+    SyborgKeyboardState *s = (SyborgKeyboardState *)opaque;
+    uint32_t val;
+    int i;
+
+    if (version_id != 1)
+        return -EINVAL;
+
+    val = qemu_get_be32(f);
+    if (val != s->fifo_size)
+        return -EINVAL;
+
+    s->int_enabled = qemu_get_be32(f);
+    s->extension_bit = 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->key_fifo[i] = qemu_get_be32(f);
+    }
+    return 0;
+}
+
+static void syborg_keyboard_init(SysBusDevice *dev)
+{
+    SyborgKeyboardState *s = FROM_SYSBUS(SyborgKeyboardState, dev);
+    int iomemtype;
+
+    sysbus_init_irq(dev, &s->irq);
+    iomemtype = cpu_register_io_memory(0, syborg_keyboard_readfn,
+                                       syborg_keyboard_writefn, s);
+    sysbus_init_mmio(dev, 0x1000, iomemtype);
+    s->fifo_size = qdev_get_prop_int(&dev->qdev, "fifo-size", 16);
+    if (s->fifo_size <= 0) {
+        fprintf(stderr, "syborg_keyboard: fifo too small\n");
+        s->fifo_size = 16;
+    }
+    s->key_fifo = qemu_mallocz(s->fifo_size * sizeof(s->key_fifo[0]));
+
+    qemu_add_kbd_event_handler(syborg_keyboard_event, s);
+
+    register_savevm("syborg_keyboard", -1, 1,
+                    syborg_keyboard_save, syborg_keyboard_load, s);
+}
+
+static void syborg_keyboard_register_devices(void)
+{
+    sysbus_register_dev("syborg,keyboard", sizeof(SyborgKeyboardState),
+                        syborg_keyboard_init);
+}
+
+device_init(syborg_keyboard_register_devices)