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-rw-r--r--qemu/hw/input/pl050.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/qemu/hw/input/pl050.c b/qemu/hw/input/pl050.c
new file mode 100644
index 000000000..c1b08d5a4
--- /dev/null
+++ b/qemu/hw/input/pl050.c
@@ -0,0 +1,205 @@
+/*
+ * Arm PrimeCell PL050 Keyboard / Mouse Interface
+ *
+ * Copyright (c) 2006-2007 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licensed under the GPL.
+ */
+
+#include "hw/sysbus.h"
+#include "hw/input/ps2.h"
+
+#define TYPE_PL050 "pl050"
+#define PL050(obj) OBJECT_CHECK(PL050State, (obj), TYPE_PL050)
+
+typedef struct PL050State {
+ SysBusDevice parent_obj;
+
+ MemoryRegion iomem;
+ void *dev;
+ uint32_t cr;
+ uint32_t clk;
+ uint32_t last;
+ int pending;
+ qemu_irq irq;
+ bool is_mouse;
+} PL050State;
+
+static const VMStateDescription vmstate_pl050 = {
+ .name = "pl050",
+ .version_id = 2,
+ .minimum_version_id = 2,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(cr, PL050State),
+ VMSTATE_UINT32(clk, PL050State),
+ VMSTATE_UINT32(last, PL050State),
+ VMSTATE_INT32(pending, PL050State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+#define PL050_TXEMPTY (1 << 6)
+#define PL050_TXBUSY (1 << 5)
+#define PL050_RXFULL (1 << 4)
+#define PL050_RXBUSY (1 << 3)
+#define PL050_RXPARITY (1 << 2)
+#define PL050_KMIC (1 << 1)
+#define PL050_KMID (1 << 0)
+
+static const unsigned char pl050_id[] =
+{ 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
+
+static void pl050_update(void *opaque, int level)
+{
+ PL050State *s = (PL050State *)opaque;
+ int raise;
+
+ s->pending = level;
+ raise = (s->pending && (s->cr & 0x10) != 0)
+ || (s->cr & 0x08) != 0;
+ qemu_set_irq(s->irq, raise);
+}
+
+static uint64_t pl050_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ PL050State *s = (PL050State *)opaque;
+ if (offset >= 0xfe0 && offset < 0x1000)
+ return pl050_id[(offset - 0xfe0) >> 2];
+
+ switch (offset >> 2) {
+ case 0: /* KMICR */
+ return s->cr;
+ case 1: /* KMISTAT */
+ {
+ uint8_t val;
+ uint32_t stat;
+
+ val = s->last;
+ val = val ^ (val >> 4);
+ val = val ^ (val >> 2);
+ val = (val ^ (val >> 1)) & 1;
+
+ stat = PL050_TXEMPTY;
+ if (val)
+ stat |= PL050_RXPARITY;
+ if (s->pending)
+ stat |= PL050_RXFULL;
+
+ return stat;
+ }
+ case 2: /* KMIDATA */
+ if (s->pending)
+ s->last = ps2_read_data(s->dev);
+ return s->last;
+ case 3: /* KMICLKDIV */
+ return s->clk;
+ case 4: /* KMIIR */
+ return s->pending | 2;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "pl050_read: Bad offset %x\n", (int)offset);
+ return 0;
+ }
+}
+
+static void pl050_write(void *opaque, hwaddr offset,
+ uint64_t value, unsigned size)
+{
+ PL050State *s = (PL050State *)opaque;
+ switch (offset >> 2) {
+ case 0: /* KMICR */
+ s->cr = value;
+ pl050_update(s, s->pending);
+ /* ??? Need to implement the enable/disable bit. */
+ break;
+ case 2: /* KMIDATA */
+ /* ??? This should toggle the TX interrupt line. */
+ /* ??? This means kbd/mouse can block each other. */
+ if (s->is_mouse) {
+ ps2_write_mouse(s->dev, value);
+ } else {
+ ps2_write_keyboard(s->dev, value);
+ }
+ break;
+ case 3: /* KMICLKDIV */
+ s->clk = value;
+ return;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "pl050_write: Bad offset %x\n", (int)offset);
+ }
+}
+static const MemoryRegionOps pl050_ops = {
+ .read = pl050_read,
+ .write = pl050_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static int pl050_initfn(SysBusDevice *dev)
+{
+ PL050State *s = PL050(dev);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &pl050_ops, s, "pl050", 0x1000);
+ sysbus_init_mmio(dev, &s->iomem);
+ sysbus_init_irq(dev, &s->irq);
+ if (s->is_mouse) {
+ s->dev = ps2_mouse_init(pl050_update, s);
+ } else {
+ s->dev = ps2_kbd_init(pl050_update, s);
+ }
+ return 0;
+}
+
+static void pl050_keyboard_init(Object *obj)
+{
+ PL050State *s = PL050(obj);
+
+ s->is_mouse = false;
+}
+
+static void pl050_mouse_init(Object *obj)
+{
+ PL050State *s = PL050(obj);
+
+ s->is_mouse = true;
+}
+
+static const TypeInfo pl050_kbd_info = {
+ .name = "pl050_keyboard",
+ .parent = TYPE_PL050,
+ .instance_init = pl050_keyboard_init,
+};
+
+static const TypeInfo pl050_mouse_info = {
+ .name = "pl050_mouse",
+ .parent = TYPE_PL050,
+ .instance_init = pl050_mouse_init,
+};
+
+static void pl050_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(oc);
+
+ sdc->init = pl050_initfn;
+ dc->vmsd = &vmstate_pl050;
+}
+
+static const TypeInfo pl050_type_info = {
+ .name = TYPE_PL050,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(PL050State),
+ .abstract = true,
+ .class_init = pl050_class_init,
+};
+
+static void pl050_register_types(void)
+{
+ type_register_static(&pl050_type_info);
+ type_register_static(&pl050_kbd_info);
+ type_register_static(&pl050_mouse_info);
+}
+
+type_init(pl050_register_types)