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ps2: correctly handle 'get/set scancode' command 

When getting scancode, current scancode must be preceded from reply ack.
When setting scancode, we must reject invalid scancodes.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Message-id: 1473969987-5890-3-git-send-email-hpoussin@reactos.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hervé Poussineau 2016-09-15 22:06:24 +02:00 committed by Gerd Hoffmann
parent 06b3611fc2
commit 4df23b64c5
1 changed files with 5 additions and 3 deletions
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8
hw/input/ps2.c
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@ -296,16 +296,18 @@ void ps2_write_keyboard(void *opaque, int val)
break;
case KBD_CMD_SCANCODE:
if (val == 0) {
ps2_queue(&s->common, KBD_REPLY_ACK);
if (s->scancode_set == 1)
ps2_put_keycode(s, 0x43);
else if (s->scancode_set == 2)
ps2_put_keycode(s, 0x41);
else if (s->scancode_set == 3)
ps2_put_keycode(s, 0x3f);
} else {
if (val >= 1 && val <= 3)
s->scancode_set = val;
} else if (val >= 1 && val <= 3) {
s->scancode_set = val;
ps2_queue(&s->common, KBD_REPLY_ACK);
} else {
ps2_queue(&s->common, KBD_REPLY_RESEND);
}
s->common.write_cmd = -1;
break;