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authorLoic Pallardy <loic.pallardy-ext@stericsson.com>2012-08-06 19:12:30 +0400
committerChris Ball <cjb@laptop.org>2012-12-06 22:54:48 +0400
commit67c79db8d9c0e5d2e2075c9108f42566ce0f8a6f (patch)
treea54d009c61dc3002e54efc366be988b5a5a3dd08
parent188cc0424e9bd7733ee3e412da6df2cf42701061 (diff)
downloadlinux-67c79db8d9c0e5d2e2075c9108f42566ce0f8a6f.tar.xz
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>
-rw-r--r--drivers/mmc/core/core.c14
-rw-r--r--include/linux/mmc/core.h2
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);