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sdcard: handle CMD54 (SDIO) 

Linux uses it to poll the bus before polling for a card.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 20180215221325.7611-10-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2018-02-22 15:12:53 +00:00 committed by Peter Maydell
parent da26e3f360
commit 49fb7381b2
1 changed files with 2 additions and 3 deletions
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5
hw/sd/sd.c
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@ -1371,9 +1371,8 @@ static sd_rsp_type_t sd_normal_command(SDState *sd,
} }
break; break;
case 52: case 52 ... 54:
case 53: /* CMD52, CMD53, CMD54: reserved for SDIO cards
/* CMD52, CMD53: reserved for SDIO cards
* (see the SDIO Simplified Specification V2.0) * (see the SDIO Simplified Specification V2.0)
* Handle as illegal command but do not complain * Handle as illegal command but do not complain
* on stderr, as some OSes may use these in their * on stderr, as some OSes may use these in their