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Commit 67c79db8 authored by Loic Pallardy's avatar Loic Pallardy Committed by Chris Ball
Browse files

mmc: core: Add mmc_set_blockcount feature 



Provide support for automatically sending Set Block Count
(CMD23) messages. Used at least for RPMB support.

Signed-off-by: default avatarAlex Macro <alex.macro@stericsson.com>
Signed-off-by: default avatarLoic Pallardy <loic.pallardy@stericsson.com>
Reviewed-by: default avatarNamjae Jeon <linkinjeon@gmail.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Acked-by: default avatarJohan Rudholm <johan.rudholm@stericsson.com>
Acked-by: default avatarKrishna Konda <kkonda@codeaurora.org>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 188cc042

drivers/mmc/core/core.c

+14 −0
Original line number Diff line number Diff line
@@ -1958,6 +1958,20 @@ int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) 
}

EXPORT_SYMBOL(mmc_set_blocklen);



int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,

			bool is_rel_write)

{

	struct mmc_command cmd = {0};



	cmd.opcode = MMC_SET_BLOCK_COUNT;

	cmd.arg = blockcount & 0x0000FFFF;

	if (is_rel_write)

		cmd.arg |= 1 << 31;

	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;

	return mmc_wait_for_cmd(card->host, &cmd, 5);

}

EXPORT_SYMBOL(mmc_set_blockcount);



static void mmc_hw_reset_for_init(struct mmc_host *host)

{

	if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)

include/linux/mmc/core.h

+2 −0
Original line number Diff line number Diff line
@@ -170,6 +170,8 @@ extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, 
extern unsigned int mmc_calc_max_discard(struct mmc_card *card);



extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);

extern int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,

			      bool is_rel_write);

extern int mmc_hw_reset(struct mmc_host *host);

extern int mmc_hw_reset_check(struct mmc_host *host);

extern int mmc_can_reset(struct mmc_card *card);