[Qemu-devel] [3/6] PS/2: Add KBD_CMD_SCANCODE command

[Hervé Poussineau]

PS/2 controller emulation lacks the KBD_CMD_SCANCODE command, which 
gets/sets the scancode set (1, 2 or 3).
Scancode sets 1 and 2 are still not supported.
(This patch was already sent on 20080224)

Index: hw/ps2.c
===================================================================
RCS file: /sources/qemu/qemu/hw/ps2.c,v
retrieving revision 1.10
diff -u -r1.10 ps2.c
--- hw/ps2.c    16 Dec 2007 23:41:11 -0000      1.10
+++ hw/ps2.c    23 Feb 2008 21:05:05 -0000
@@ -34,6 +34,7 @@
 /* Keyboard Commands */
 #define KBD_CMD_SET_LEDS       0xED    /* Set keyboard leds */
 #define KBD_CMD_ECHO           0xEE
+#define KBD_CMD_SCANCODE       0xF0    /* Get/set scancode set */
 #define KBD_CMD_GET_ID                 0xF2    /* get keyboard ID */
 #define KBD_CMD_SET_RATE       0xF3    /* Set typematic rate */
 #define KBD_CMD_ENABLE         0xF4    /* Enable scanning */
@@ -89,6 +90,7 @@
        conversions we do the translation (if any) in the PS/2 emulation
        not the keyboard controller.  */
     int translate;
+    int scancode_set;
 } PS2KbdState;
 
 typedef struct {
@@ -134,7 +136,9 @@
 static void ps2_put_keycode(void *opaque, int keycode)
 {
     PS2KbdState *s = opaque;
-    if (!s->translate && keycode < 0xe0)
+
+    /* XXX: add support for scancode sets 1 and 2 */
+    if (!s->translate && keycode < 0xe0 && s->scancode_set == 3)
       {
         if (keycode & 0x80)
             ps2_queue(&s->common, 0xf0);
@@ -202,6 +206,7 @@
             s->scan_enabled = 1;
             ps2_queue(&s->common, KBD_REPLY_ACK);
             break;
+        case KBD_CMD_SCANCODE:
         case KBD_CMD_SET_LEDS:
         case KBD_CMD_SET_RATE:
             s->common.write_cmd = val;
@@ -227,6 +232,22 @@
             break;
         }
         break;
+    case KBD_CMD_SCANCODE:
+        if (val == 0) {
+            if (s->scancode_set == 1)
+                ps2_queue(&s->common, 0x43);
+            else if (s->scancode_set == 2)
+                ps2_queue(&s->common, 0x41);
+            else if (s->scancode_set == 3)
+                ps2_queue(&s->common, 0x3f);
+            else
+                ps2_queue(&s->common, KBD_REPLY_ACK);
+        } else {
+            s->scancode_set = val;
+            ps2_queue(&s->common, KBD_REPLY_ACK);
+        }
+        s->common.write_cmd = -1;
+        break;
     case KBD_CMD_SET_LEDS:
         ps2_queue(&s->common, KBD_REPLY_ACK);
         s->common.write_cmd = -1;
@@ -493,6 +514,7 @@
     ps2_common_save (f, &s->common);
     qemu_put_be32(f, s->scan_enabled);
     qemu_put_be32(f, s->translate);
+    qemu_put_be32(f, s->scancode_set);
 }
 
 static void ps2_mouse_save(QEMUFile* f, void* opaque)
@@ -516,12 +538,16 @@
 {
     PS2KbdState *s = (PS2KbdState*)opaque;
 
-    if (version_id != 2)
+    if (version_id != 2 && version_id != 3)
         return -EINVAL;
 
     ps2_common_load (f, &s->common);
     s->scan_enabled=qemu_get_be32(f);
     s->translate=qemu_get_be32(f);
+    if (version_id == 3)
+        s->scancode_set=qemu_get_be32(f);
+    else
+        s->scancode_set=3;
     return 0;
 }
 
@@ -552,8 +578,9 @@
 
     s->common.update_irq = update_irq;
     s->common.update_arg = update_arg;
+    s->scancode_set = 3;
     ps2_reset(&s->common);
-    register_savevm("ps2kbd", 0, 2, ps2_kbd_save, ps2_kbd_load, s);
+    register_savevm("ps2kbd", 0, 3, ps2_kbd_save, ps2_kbd_load, s);
     qemu_add_kbd_event_handler(ps2_put_keycode, s);
     qemu_register_reset(ps2_reset, &s->common);
     return s;