Provide support for automatically sending Set Block Count
(CMD23) messages. Used at least for RPMB support.
Signed-off-by: Alex Macro <alex.macro@xxxxxxxxxxxxxx>
Signed-off-by: Loic Pallardy <loic.pallardy@xxxxxxxxxxxxxx>
---
drivers/mmc/core/core.c | 14 ++++++++++++++
include/linux/mmc/core.h | 2 ++
2 files changed, 16 insertions(+)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 0b6141d..7990e2c 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1827,6 +1827,20 @@ 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)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 1b431c7..098b7dd 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -166,6 +166,8 @@ 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);
--
1.7.11.1
--
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