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[PULL 16/18] hw/sd: sd: Bypass the RCA check for CMD13 in SPI mode

From: Philippe Mathieu-Daudé
Subject: [PULL 16/18] hw/sd: sd: Bypass the RCA check for CMD13 in SPI mode
Date: Sat, 20 Feb 2021 01:13:07 +0100

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
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>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210216150225.27996-9-bmeng.cn@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
 hw/sd/sd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 3a515a5365f..8b397effbcc 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -1163,8 +1163,9 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, 
SDRequest req)
     case 13:   /* CMD13:  SEND_STATUS */
         switch (sd->mode) {
         case sd_data_transfer_mode:
-            if (sd->rca != rca)
+            if (!sd->spi && sd->rca != rca) {
                 return sd_r0;
+            }
             return sd_r1;

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