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mmc: core: Allow setting CMD timeout for CMD6 (SWITCH).

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CMD6 is an R1B-type command, where DAT is used as busy. Depending
on register written using CMD6, timeout value can be different
as per spec.

Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Andrei Warkentin
2011-04-11 16:13:43 -05:00
committed by Chris Ball
parent a3c7778f81
commit d3a8d95dcb
4 changed files with 24 additions and 8 deletions
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16
drivers/mmc/core/mmc_ops.c
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@@ -387,7 +387,19 @@ int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
return err;
}
int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
/**
* mmc_switch - modify EXT_CSD register
* @card: the MMC card associated with the data transfer
* @set: cmd set values
* @index: EXT_CSD register index
* @value: value to program into EXT_CSD register
* @timeout_ms: timeout (ms) for operation performed by register write,
* timeout of zero implies maximum possible timeout
*
* Modifies the EXT_CSD register for selected card.
*/
int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
unsigned int timeout_ms)
{
int err;
struct mmc_command cmd;
@@ -404,6 +416,7 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
(value << 8) |
set;
cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
cmd.cmd_timeout_ms = timeout_ms;
err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
if (err)
@@ -433,6 +446,7 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
return 0;
}
EXPORT_SYMBOL_GPL(mmc_switch);
int mmc_send_status(struct mmc_card *card, u32 *status)
{