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: Alex Macro <alex.macro@stericsson.com>
Signed-off-by: Loic Pallardy <loic.pallardy@stericsson.com>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Johan Rudholm <johan.rudholm@stericsson.com>
Acked-by: Krishna Konda <kkonda@codeaurora.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index bccfd18..aaed768 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1958,6 +1958,20 @@
}
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)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 9b9cdaf..5bf7c22 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -170,6 +170,8 @@
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);