[PATCH 1/9] mci: implement mci_set_blockcount()

[Sascha Hauer]

This adds a function to send a MMC_CMD_SET_BLOCK_COUNT command. This
is not yet needed by barebox as we use open end multiblock transfers,
but will be needed by upcoming RPMB support.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/mci/mci-core.c | 9 +++++++++
 include/mci.h          | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index 27a10df9ce..6d8140f7b0 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -311,6 +311,15 @@ static int mci_block_erase(struct mci *card, unsigned int from,
 	return -EIO;
 }
 
+int mci_set_blockcount(struct mci *mci, unsigned int cmdarg)
+{
+	struct mci_cmd cmd = {};
+
+	mci_setup_cmd(&cmd, MMC_CMD_SET_BLOCK_COUNT, cmdarg, MMC_RSP_R1);
+
+	return mci_send_cmd(mci, &cmd, NULL);
+}
+
 static int mci_do_block_op(struct mci *mci, const void *src, void *dst, int blocknum,
 		int blocks)
 {
diff --git a/include/mci.h b/include/mci.h
index f0db1f9ea0..c6ee6ea50f 100644
--- a/include/mci.h
+++ b/include/mci.h
@@ -87,12 +87,16 @@
 #define MMC_CMD_READ_MULTIPLE_BLOCK	18
 #define MMC_SEND_TUNING_BLOCK		19   /* adtc R1  */
 #define MMC_SEND_TUNING_BLOCK_HS200	21   /* adtc R1  */
+#define MMC_CMD_SET_BLOCK_COUNT		23
 #define MMC_CMD_WRITE_SINGLE_BLOCK	24
 #define MMC_CMD_WRITE_MULTIPLE_BLOCK	25
 #define MMC_CMD_APP_CMD			55
 #define MMC_CMD_SPI_READ_OCR		58
 #define MMC_CMD_SPI_CRC_ON_OFF		59
 
+#define MMC_CMD23_ARG_BLOCKS	GENMASK(15, 0)
+#define MMC_CMD23_ARG_REL_WR	BIT(31)
+
   /* class 5 */
 #define MMC_ERASE_GROUP_START    35   /* ac   [31:0] data addr   R1  */
 #define MMC_ERASE_GROUP_END      36   /* ac   [31:0] data addr   R1  */
@@ -724,6 +728,7 @@ int mmc_hs200_tuning(struct mci *mci);
 int mci_execute_tuning(struct mci *mci);
 int mci_send_abort_tuning(struct mci *mci, u32 opcode);
 int mmc_select_timing(struct mci *mci);
+int mci_set_blockcount(struct mci *mci, unsigned int cmdarg);
 
 static inline bool mmc_card_hs200(struct mci *mci)
 {

-- 
2.39.5