From: Philippe Mathieu-Daudé <f4...@amsat.org> Only SCSD cards support Class 6 (Block Oriented Write Protection) commands.
"SD Specifications Part 1 Physical Layer Simplified Spec. v3.01" 4.3.14 Command Functional Difference in Card Capacity Types * Write Protected Group SDHC and SDXC do not support write-protected groups. Issuing CMD28, CMD29 and CMD30 generates the ILLEGAL_COMMAND error. Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org> --- hw/sd/sd.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/sd/sd.c b/hw/sd/sd.c index 90d5ff6209..4cc1ecf9f9 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -905,6 +905,11 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req) sd->multi_blk_cnt = 0; } + if (sd_cmd_class[req.cmd] == 6 && FIELD_EX32(sd->ocr, OCR, CARD_CAPACITY)) { + /* Only Standard Capacity cards support class 6 commands */ + return sd_illegal; + } + switch (req.cmd) { /* Basic commands (Class 0 and Class 1) */ case 0: /* CMD0: GO_IDLE_STATE */ -- 2.21.3