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[Qemu-devel] [PATCH 3/4] hw/sd.c: Don't complain about SDIO commands CMD
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH 3/4] hw/sd.c: Don't complain about SDIO commands CMD52/CMD53 |
Date: |
Sun, 22 May 2011 23:01:16 +0100 |
From: Peter Maydell <address@hidden>
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 <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
hw/sd.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/hw/sd.c b/hw/sd.c
index f44a970..cedfb20 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)
--
1.7.4.4