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mmc: core: Add mmc_set_blockcount feature

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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]>
This commit is contained in:
Loic Pallardy 2012-08-06 17:12:30 +02:00 • committed by Chris Ball
commit 67c79db8d9
2 changed files with 16 additions and 0 deletions
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14
drivers/mmc/core/core.c
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@ -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)