From 39e594dbcd897849f2ca95b3310ea00fff29ea99 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 20 May 2011 10:11:53 +0100 Subject: 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 Signed-off-by: Stefan Hajnoczi --- hw/sd.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'hw/sd.c') 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) -- cgit v1.2.3-55-g7522