Commit 68539e2b authored by Avri Altman's avatar Avri Altman Committed by Ulf Hansson
Browse files

mmc: core: Indicate SD specs higher than 4.0 



SD specs version 4.x and 5.x have a dedicated slices in the SCR register.
Higher versions will rely on a combination of the existing fields.

Signed-off-by: default avatarAvri Altman <avri.altman@wdc.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 01904ff7

drivers/mmc/core/sd.c

+5 −0
Original line number Diff line number Diff line
@@ -209,6 +209,11 @@ static int mmc_decode_scr(struct mmc_card *card) 
		/* Check if Physical Layer Spec v3.0 is supported */

		scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);



	if (scr->sda_spec3) {

		scr->sda_spec4 = UNSTUFF_BITS(resp, 42, 1);

		scr->sda_specx = UNSTUFF_BITS(resp, 38, 4);

	}



	if (UNSTUFF_BITS(resp, 55, 1))

		card->erased_byte = 0xFF;

	else

include/linux/mmc/card.h

+2 −0
Original line number Diff line number Diff line
@@ -133,6 +133,8 @@ struct mmc_ext_csd { 
struct sd_scr {

	unsigned char		sda_vsn;

	unsigned char		sda_spec3;

	unsigned char		sda_spec4;

	unsigned char		sda_specx;

	unsigned char		bus_widths;

#define SD_SCR_BUS_WIDTH_1	(1<<0)

#define SD_SCR_BUS_WIDTH_4	(1<<2)

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