hw/sd/sdcard: Send WRITE_PROT bits MSB first (CMD30)

Per sections 3.6.1 (SD Bus Protocol) and 7.3.2 (Responses):

  In the CMD line the Most Significant Bit is transmitted first.

Use the stl_be_p() helper to store the value in big-endian.

Fixes: a1bb27b1e9 ("Initial SD card emulation")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20240628070216.92609-8-philmd@linaro.org>

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index b5d002e6d712aa303b325c515a8f796620ccff0d..1e9530f9aeaa7a738e487be6f18bccb641d990fa 100644 (file)
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -1508,7 +1508,7 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
             }
 
             sd->state = sd_sendingdata_state;
-            *(uint32_t *) sd->data = sd_wpbits(sd, req.arg);
+            stl_be_p(sd->data, sd_wpbits(sd, req.arg));
             sd->data_start = addr;
             sd->data_offset = 0;
             return sd_r1;