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hw/sd/sdcard: Restrict Class 6 commands to SCSD cards

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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.

Cc: qemu-stable@nongnu.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20200630133912.9428-7-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-06-03 19:59:16 +02:00
parent 6a289a5ba3
commit 9157dd597d
1 changed files with 5 additions and 0 deletions
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5
hw/sd/sd.c
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@ -920,6 +920,11 @@ 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 */