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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>
This commit is contained in:
Peter Maydell 2011-05-20 10:11:53 +01:00 committed by Stefan Hajnoczi
parent 1cd087251a
commit 39e594dbcd
1 changed files with 11 additions and 0 deletions
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hw/sd.c
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@ -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)