diff options
| author | Loic Pallardy <[email protected]> | 2012-08-06 17:12:30 +0200 |
|---|---|---|
| committer | Chris Ball <[email protected]> | 2012-12-06 13:54:48 -0500 |
| commit | 67c79db8d9c0e5d2e2075c9108f42566ce0f8a6f (patch) | |
| tree | a54d009c61dc3002e54efc366be988b5a5a3dd08 | |
| parent | 188cc0424e9bd7733ee3e412da6df2cf42701061 (diff) | |
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 <[email protected]>
Signed-off-by: Loic Pallardy <[email protected]>
Reviewed-by: Namjae Jeon <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Acked-by: Johan Rudholm <[email protected]>
Acked-by: Krishna Konda <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
| -rw-r--r-- | drivers/mmc/core/core.c | 14 | ||||
| -rw-r--r-- | include/linux/mmc/core.h | 2 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index bccfd1858b08..aaed7687cf09 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -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) diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 9b9cdafc7737..5bf7c2274fcb 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -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); |