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[22/23] hw/sd/sdcard: Send WRITE_PROT bits MSB first (CMD30)

Message ID 20240621080554.18986-23-philmd@linaro.org
State Superseded
Headers show
Series hw/sd/sdcard: Accumulation of cleanups and fixes | expand

Commit Message

Philippe Mathieu-Daudé June 21, 2024, 8:05 a.m. UTC 
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.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
RFC because I'm surprised this has been unnoticed for 17 years
(commit a1bb27b1e9 "initial SD card emulation", April 2007).

Cc: Peter Maydell <peter.maydell@linaro.org>
---
 hw/sd/sd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 712fbc0926..601a6908aa 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -1498,7 +1498,7 @@  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;