From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 20 May 2011 09:11:53 +0000 (+0100)
Subject: hw/sd.c: Don't complain about SDIO commands CMD52/CMD53
X-Git-Tag: qemu-xen-4.2.0~889^2~1
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=39e594dbcd897849f2ca95b3310ea00fff29ea99;p=qemu-xen.git

hw/sd.c: Don't complain about SDIO commands CMD52/CMD53

The SDIO specification introduces new commands 52 and 53.
Handle as illegal command but do not complain on stderr,
as SDIO-aware OSes (including Linux) may legitimately use
these in their probing for presence of an SDIO card.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
---

diff --git a/hw/sd.c b/hw/sd.c
index f44a97092b..cedfb20249 100644
--- a/hw/sd.c
+++ b/hw/sd.c
@@ -1104,6 +1104,17 @@ static sd_rsp_type_t sd_normal_command(SDState *sd,
         }
         break;
 
+    case 52:
+    case 53:
+        /* CMD52, CMD53: reserved for SDIO cards
+         * (see the SDIO Simplified Specification V2.0)
+         * Handle as illegal command but do not complain
+         * on stderr, as some OSes may use these in their
+         * probing for presence of an SDIO card.
+         */
+        sd->card_status |= ILLEGAL_COMMAND;
+        return sd_r0;
+
     /* Application specific commands (Class 8) */
     case 55:	/* CMD55:  APP_CMD */
         if (sd->rca != rca)