[PATCH 01/13] mmc: core: Simplify by adding mmc_execute_tuning()

Adrian Hunter
2014-12-05T17:43:19Z

For each MMC, SD and SDIO there is code that
holds the clock, calls ops->execute_tuning, and
releases the clock. Simplify the code a bit by
providing a separate function to do that.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/mmc/core/core.c | 24 ++++++++++++++++++++++++
drivers/mmc/core/core.h | 3 +++
drivers/mmc/core/mmc.c | 14 +-------------
drivers/mmc/core/sd.c | 13 ++++---------
drivers/mmc/core/sdio.c | 14 ++++----------
5 files changed, 36 insertions(+), 32 deletions(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 9584bff..b329725 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1077,6 +1077,30 @@ void mmc_set_ungated(struct mmc_host *host)
}
#endif

+int mmc_execute_tuning(struct mmc_card *card)
+{
+ struct mmc_host *host = card->host;
+ u32 opcode;
+ int err;
+
+ if (!host->ops->execute_tuning)
+ return 0;
+
+ if (mmc_card_mmc(card))
+ opcode = MMC_SEND_TUNING_BLOCK_HS200;
+ else
+ opcode = MMC_SEND_TUNING_BLOCK;
+
+ mmc_host_clk_hold(host);
+ err = host->ops->execute_tuning(host, opcode);
+ mmc_host_clk_release(host);
+
+ if (err)
+ pr_err("%s: tuning execution failed\n", mmc_hostname(host));
+
+ return err;
+}
+
/*
* Change the bus mode (open drain/push-pull) of a host.
*/
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index d76597c..1b022c9 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -82,5 +82,8 @@ void mmc_add_card_debugfs(struct mmc_card *card);
void mmc_remove_card_debugfs(struct mmc_card *card);

void mmc_init_context_info(struct mmc_host *host);
+
+int mmc_execute_tuning(struct mmc_card *card);
+
#endif

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 02ad792..c712ba7 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1194,7 +1194,6 @@ EXPORT_SYMBOL(tuning_blk_pattern_8bit);
static int mmc_hs200_tuning(struct mmc_card *card)
{
struct mmc_host *host = card->host;
- int err = 0;

/*
* Timing should be adjusted to the HS400 target
@@ -1205,18 +1204,7 @@ static int mmc_hs200_tuning(struct mmc_card *card)
if (host->ops->prepare_hs400_tuning)
host->ops->prepare_hs400_tuning(host, &host->ios);

- if (host->ops->execute_tuning) {
- mmc_host_clk_hold(host);
- err = host->ops->execute_tuning(host,
- MMC_SEND_TUNING_BLOCK_HS200);
- mmc_host_clk_release(host);
-
- if (err)
- pr_err("%s: tuning execution failed\n",
- mmc_hostname(host));
- }
-
- return err;
+ return mmc_execute_tuning(card);
}

/*
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index d90a6de..7907544 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -660,15 +660,10 @@ static int mmc_sd_init_uhs_card(struct mmc_card *card)
* SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
* SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
*/
- if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning &&
- (card->sd_bus_speed == UHS_SDR50_BUS_SPEED ||
- card->sd_bus_speed == UHS_SDR104_BUS_SPEED)) {
- mmc_host_clk_hold(card->host);
- err = card->host->ops->execute_tuning(card->host,
- MMC_SEND_TUNING_BLOCK);
- mmc_host_clk_release(card->host);
- }
-
+ if (!mmc_host_is_spi(card->host) &&
+ (card->sd_bus_speed == UHS_SDR50_BUS_SPEED ||
+ card->sd_bus_speed == UHS_SDR104_BUS_SPEED))
+ err = mmc_execute_tuning(card);
out:
kfree(status);

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index fd0750b..ce6cc47 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -567,17 +567,11 @@ static int mmc_sdio_init_uhs_card(struct mmc_card *card)
* SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
* SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
*/
- if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning &&
- ((card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR50) ||
- (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104))) {
- mmc_host_clk_hold(card->host);
- err = card->host->ops->execute_tuning(card->host,
- MMC_SEND_TUNING_BLOCK);
- mmc_host_clk_release(card->host);
- }
-
+ if (!mmc_host_is_spi(card->host) &&
+ ((card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR50) ||
+ (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)))
+ err = mmc_execute_tuning(card);
out:
-
return err;
}

--
1.9.1