haraldwolff/qemu-patch-raspberry4
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sdcard: fix the 'maximum data transfer rate' to 25MHz

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To comply with Spec v1.10 (and 2.00, 3.01):

. TRAN_SPEED

for current SD Memory Cards that field must be always 0_0110_010b (032h) which is
equal to 25MHz - the mandatory maximum operating frequency of SD Memory Card.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 20180215221325.7611-4-f4bug@amsat.org
[PMM: fixed comment indent]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2018-02-22 15:12:53 +00:00 committed by Peter Maydell
parent e8feec808e
commit d7ecb86752
1 changed files with 1 additions and 1 deletions
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2
hw/sd/sd.c
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@ -357,7 +357,7 @@ static void sd_set_csd(SDState *sd, uint64_t size)
sd->csd[0] = 0x00; /* CSD structure */
sd->csd[1] = 0x26; /* Data read access-time-1 */
sd->csd[2] = 0x00; /* Data read access-time-2 */
sd->csd[3] = 0x5a; /* Max. data transfer rate */
sd->csd[3] = 0x32; /* Max. data transfer rate: 25 MHz */
sd->csd[4] = 0x5f; /* Card Command Classes */
sd->csd[5] = 0x50 | /* Max. read data block length */
HWBLOCK_SHIFT;