mmc: core: increase data-timeout value for Hynix cards

Add a quirk to increase the data-timeout value for Hynix eMMC
cards only. This value is fixed to a maximum of 4 seconds.

Change-Id: I4bca6cbc877b323b29a3f7f5923d0708c48adf2c
CRs-fixed: 587284
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
mmc: sdhci: fix incorrect command used in tuning

For SD hosts using retuning mode 1, when retuning timer expired, it will
need to do retuning in sdhci_request before processing the actual
request. But the retuning command is fixed: cmd19 for SD card and cmd21
for eMMC card, so we can't use the original request's command to do the
tuning.

And since the tuning command depends on the card type attached to the
host, we will need to know the card type to use the correct tuning
command.

Change-Id: Ibde71d8a8b4e0ff75456923c7c3d8579c04109b4
Signed-off-by: Aaron Lu <aaron.lu@amd.com>
Reviewed-by: Philip Rakity <prakity@marvell.com>
Cc: stable <stable@vger.kernel.org> [3.3+]
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
mmc: sdhci: fix NULL dereference in sdhci_request() tuning

Commit 473b095a72a9 ("mmc: sdhci: fix incorrect command used in tuning")
introduced a NULL dereference at resume-time if an SD 3.0 host controller
raises the SDHCI_NEEDS_TUNING flag while no card is inserted.  Seen on an
OLPC XO-4 with sdhci-pxav3, but presumably affects other controllers too.

Change-Id: I14a9e2a4566ed9f6d4186d6f63ed2e192485973d
Signed-off-by: Chris Ball <cjb@laptop.org>
Cc: stable <stable@vger.kernel.org> [3.3+]
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
mmc: sdhci: retune on cmd or data CRC error

Initiate a DLL (delay locked loop) retune for the next command,
if the current command fails with a CRC error.
This may help to choose a different phase (delay) if the same
has changed over the elapsed period of time.

CRs-Fixed: 587985
Change-Id: I21f6a5dadb096dd38d41fcf2251fa50b03c8bbb4
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
mmc: sdhci: Turn on controller clocks and card power at MMC_POWER_UP

Currently, the clock to the card is enabled prior to enabling
the power to card. Specification requires that the power be
supplied first and then a delay of 10ms and then clock be
provided to the card.

In this, during MMC_POWER_UP mode, the controller clocks would be
ON and the power would be supplied to the card. In the MMC_POWER_ON
mode, the clocks to the card would be enabled and the rate set.
A callback has been provided to facilitate the enabling of
controller clocks.

CRs-Fixed: 567658
Change-Id: I2d66eae1581b9b136faaba4cafc330aeb6a3f364
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
mmc: sdhci-msm: enable controller clocks at MMC_POWER_UP

A callback to turn-on the controller clocks is implemented.
This callback would ensure that the pclk and mclk are enabled
but the output clock to the card is disabled.

CRs-Fixed: 567658
Change-Id: Ic97e600a6388fb64f1267a097b201f31d114a1fb
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>