Re: [PATCH v2 8/8] hw/sd: sd: Bypass the RCA check for CMD13 in SPI mode

[Philippe Mathieu-Daudé]

On 2/16/21 4:02 PM, Bin Meng wrote:
> From: Bin Meng <bin.meng@windriver.com>
> 
> Unlike SD mode, when SD card is working in SPI mode, the argument
> of CMD13 is stuff bits. Hence we should bypass the RCA check.
> 
> See "Physical Layer Specification Version 8.00", chapter 7.3.1.3
> Detailed Command Description (SPI mode):
> 
>   "The card shall ignore stuff bits and reserved bits in an argument"
> 
> and Table 7-3 Commands and Arguments (SPI mode):
> 
>   "CMD13 Argument [31:0] stuff bits"
> 
> Signed-off-by: Bin Meng <bin.meng@windriver.com>
> 
> ---
> 
> Changes in v2:
> - update commit message to include the reference in the spec
> 
>  hw/sd/sd.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>