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-rw-r--r--hw/pl050.c127
1 files changed, 127 insertions, 0 deletions
diff --git a/hw/pl050.c b/hw/pl050.c
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index 0000000..20451e5
--- /dev/null
+++ b/hw/pl050.c
@@ -0,0 +1,127 @@
+/*
+ * Arm PrimeCell PL050 Keyboard / Mouse Interface
+ *
+ * Copyright (c) 2006 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licenced under the GPL.
+ */
+
+#include "vl.h"
+
+typedef struct {
+ void *dev;
+ uint32_t base;
+ uint32_t cr;
+ uint32_t clk;
+ uint32_t last;
+ void *pic;
+ int pending;
+ int irq;
+ int is_mouse;
+} pl050_state;
+
+static const unsigned char pl050_id[] =
+{ 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
+
+static void pl050_update(void *opaque, int level)
+{
+ pl050_state *s = (pl050_state *)opaque;
+ int raise;
+
+ s->pending = level;
+ raise = (s->pending && (s->cr & 0x10) != 0)
+ || (s->cr & 0x08) != 0;
+ pic_set_irq_new(s->pic, s->irq, raise);
+}
+
+static uint32_t pl050_read(void *opaque, target_phys_addr_t offset)
+{
+ pl050_state *s = (pl050_state *)opaque;
+ offset -= s->base;
+ if (offset >= 0xfe0 && offset < 0x1000)
+ return pl050_id[(offset - 0xfe0) >> 2];
+
+ switch (offset >> 2) {
+ case 0: /* KMICR */
+ return s->cr;
+ case 1: /* KMISTAT */
+ /* KMIC and KMID bits not implemented. */
+ if (s->pending) {
+ return 0x10;
+ } else {
+ return 0;
+ }
+ 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:
+ cpu_abort (cpu_single_env, "pl050_read: Bad offset %x\n", offset);
+ return 0;
+ }
+}
+
+static void pl050_write(void *opaque, target_phys_addr_t offset,
+ uint32_t value)
+{
+ pl050_state *s = (pl050_state *)opaque;
+ offset -= s->base;
+ 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:
+ cpu_abort (cpu_single_env, "pl050_write: Bad offset %x\n", offset);
+ }
+}
+static CPUReadMemoryFunc *pl050_readfn[] = {
+ pl050_read,
+ pl050_read,
+ pl050_read
+};
+
+static CPUWriteMemoryFunc *pl050_writefn[] = {
+ pl050_write,
+ pl050_write,
+ pl050_write
+};
+
+void pl050_init(uint32_t base, void *pic, int irq, int is_mouse)
+{
+ int iomemtype;
+ pl050_state *s;
+
+ s = (pl050_state *)qemu_mallocz(sizeof(pl050_state));
+ iomemtype = cpu_register_io_memory(0, pl050_readfn,
+ pl050_writefn, s);
+ cpu_register_physical_memory(base, 0x00000fff, iomemtype);
+ s->base = base;
+ s->pic = pic;
+ s->irq = irq;
+ s->is_mouse = is_mouse;
+ if (is_mouse)
+ s->dev = ps2_mouse_init(pl050_update, s);
+ else
+ s->dev = ps2_kbd_init(pl050_update, s);
+ /* ??? Save/restore. */
+}
+