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Commit 148bcab2 authored by Ulf Hansson's avatar Ulf Hansson
Browse files

mmc: core: Add helper function for EXT_CSD support 



The helper function mmc_can_ext_csd() will return a positive value if
the card supports the EXT_CSD register. Start using it at relavant
places in the mmc core.

Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent a1fc444e

drivers/mmc/core/mmc.c

+4 −4
Original line number Diff line number Diff line
@@ -190,7 +190,7 @@ static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd) 


	*new_ext_csd = NULL;



	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)

	if (!mmc_can_ext_csd(card))

		return 0;



	/*
@@ -852,7 +852,7 @@ static int mmc_select_powerclass(struct mmc_card *card) 
	int err, ddr;



	/* Power class selection is supported for versions >= 4.0 */

	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)

	if (!mmc_can_ext_csd(card))

		return 0;



	bus_width = host->ios.bus_width;
@@ -913,7 +913,7 @@ static int mmc_select_bus_width(struct mmc_card *card) 
	unsigned idx, bus_width = 0;

	int err = 0;



	if ((card->csd.mmca_vsn < CSD_SPEC_VER_4) &&

	if (!mmc_can_ext_csd(card) &&

	    !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))

		return 0;
@@ -1154,7 +1154,7 @@ static int mmc_select_timing(struct mmc_card *card) 
{

	int err = 0;



	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)

	if (!mmc_can_ext_csd(card))

		goto bus_speed;



	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)

drivers/mmc/core/mmc_ops.c

+5 −0
Original line number Diff line number Diff line
@@ -675,3 +675,8 @@ int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status) 


	return 0;

}



int mmc_can_ext_csd(struct mmc_card *card)

{

	return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);

}

drivers/mmc/core/mmc_ops.h

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp); 
int mmc_spi_set_crc(struct mmc_host *host, int use_crc);

int mmc_bus_test(struct mmc_card *card, u8 bus_width);

int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status);

int mmc_can_ext_csd(struct mmc_card *card);



#endif