From 9e61ec315374120c92cc7a20e1e078b89b217e69 Mon Sep 17 00:00:00 2001
From: pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Mon, 30 Apr 2007 02:39:55 +0000
Subject: [PATCH] PL050 status register fixes.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2759 c046a42c-6fe2-441c-8c8c-71466251a162
---
 hw/pl050.c | 31 +++++++++++++++++++++++++------
 1 file changed, 25 insertions(+), 6 deletions(-)

diff --git a/hw/pl050.c b/hw/pl050.c
index eed7294..40274e1 100644
--- a/hw/pl050.c
+++ b/hw/pl050.c
@@ -1,7 +1,7 @@
 /* 
  * Arm PrimeCell PL050 Keyboard / Mouse Interface
  *
- * Copyright (c) 2006 CodeSourcery.
+ * Copyright (c) 2006-2007 CodeSourcery.
  * Written by Paul Brook
  *
  * This code is licenced under the GPL.
@@ -20,6 +20,14 @@ typedef struct {
     int is_mouse;
 } pl050_state;
 
+#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 };
 
@@ -45,11 +53,22 @@ static uint32_t pl050_read(void *opaque, target_phys_addr_t offset)
     case 0: /* KMICR */
         return s->cr;
     case 1: /* KMISTAT */
-        /* KMIC and KMID bits not implemented.  */
-        if (s->pending) {
-            return 0x10;
-        } else {
-            return 0;
+        {
+            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)
-- 
2.7.4