linux-stable.git/drivers/mmc/core, branch v3.5

mmc: cd-gpio: pass IRQF_ONESHOT to request_threaded_irq()

2012-07-11T03:03:57+00:00

Fix a boot regression on Mackerel boards with sh_mobile_sdhi
in existing kernels causing:

genirq: Threaded irq requested with handler=NULL and !ONESHOT for irq XXX

caused by 1c6c6952 (genirq: Reject bogus threaded irq requests).

This is backported from Guennadi's patch:
"mmc: extend and rename cd-gpio helpers to handle more slot GPIO functions"

Reported-by: Rafael J. Wysocki 
Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Chris Ball

mmc: core: Revert "skip card initialization if power class selection fails"

2012-07-11T02:47:13+00:00

This reverts commit 3d93576e(skip card initialization if
power class selection fails).
Problem has been reported when this is used with eMMC4.41
card with Tegra Platform. Till the issue is root caused,
bus width selection failure should not be treated as fatal.

Reported-by: Marc Dietrich 
Signed-Off-by: Venkatraman S 
CC: Ulf Hansson 
CC: Subhash Jadavani 
CC: Saugata Das 
Signed-off-by: Chris Ball

mmc: core: return an error on suspend if mmc_deselect_cards fails

2012-06-06T13:49:47+00:00

When mmc_host is not spi mode, mmc/sd is doing mmc_deselect_cards().
mmc_deselect_cards could be returned error.
If returned error, we can know something wrong when enter suspend.

Signed-off-by: Jaehoon Chung 
Signed-off-by: Kyungmin Park 
Acked-by: Ulf Hansson 
Signed-off-by: Chris Ball

mmc: sdio: fix setting card data bus width as 4-bit

2012-06-06T13:22:53+00:00

SDIO_CCCR_IF[1:0] in SDIO card is used for card data bus width
setting as below:

     00b: 1-bit bus
     01b: Reserved
     10b: 4-bit bus
     11b: 8-bit bus (only for embedded SDIO)

And sdio_enable_wide is for setting data bus width as 4-bit.
But currently, it first reads the register, second OR' 1b with
SDIO_CCCR_IF[1], and then writes it back.

As we can see, this is based on such assumption that the
SDIO_CCCR_IF[0] is always 0. Apparently, this is not right.

Signed-off-by: Yong Ding 
Acked-by: Philip Rakity 
Signed-off-by: Chris Ball

mmc: block: Allow disabling 512B sector size emulation

2012-05-17T13:35:21+00:00

This patch adds support for large sector size of 4KB by disabling
emulation.  This patch passes eMMC DATA_SECTOR_SIZE as the logical
block size during mmc_blk_alloc_req.

In order to use this patch for 4KB sector size, ensure that
USE_NATIVE_SECTOR is enabled, partition table is 4KB sector size
aligned and file system block and sector size are 4KB multiples.

Signed-off-by: Saugata Das 
Reviewed-by: Subhash Jadavani 
Reviewed-by: Namjae Jeon 
Reviewed-by: Subhash Jadavani 
Signed-off-by: Chris Ball

mmc: core: Remove dead code

2012-05-10T00:47:49+00:00

bus_width is passed to the function and when 0 (MMC_BUS_WIDTH_1)
will cause the function to return. So in in the second test it
definitely is different from 0, and the third test is redundant.

Signed-off-by: Philippe De Swert 
Reviewed-by: Namjae Jeon 
Acked-by: Philip Rakity 
Signed-off-by: Chris Ball

mmc: core: Prevent eMMC VCC supply to be cut from late init

2012-05-09T16:55:01+00:00

For eMMC cards that has been initialized from a bootloader,
the VCC voltage supply must not be cut in an uncontrolled
manner, without first sending SLEEP or POWEROFF_NOTIFY.

The regulator_init_complete late initcall, may cut the VCC
regulator if it's reference counter is zero. To be able to
prevent the regulator from being cut, mmc_start_host, which
should execute at device init and thus before late init,
calls mmc_power_up. Then the host driver is able to increase
the reference to the regulator.

Signed-off-by: Ulf Hansson 
Reviewed-by: Mark Brown 
Signed-off-by: Chris Ball

mmc: core: skip card initialization if power class selection fails

2012-05-09T14:07:12+00:00

With current implementation of power class selection,
mmc_select_powerclass() should never fail. So treat any error
returned by this function as serious enough to skip the card
initialization.

Signed-off-by: Subhash Jadavani 
Reviewed-by: Namjae Jeon 
Signed-off-by: Chris Ball

mmc: core: fix the signaling 1.8V for HS200

2012-05-09T14:04:12+00:00

Currently only 1.2V is treated for HS200 mode. If the host has only
1.8V I/O capability not 1.2V, mmc_set_signal_voltage can't be called
for 1.8V HS200. EXT_CSD_CARD_TYPE_SDR_1_8V needs to be considered.

Signed-off-by: Seungwon Jeon 
Reviewed-by: Subhash Jadavani 
Signed-off-by: Chris Ball

mmc: core: fix the decision of HS200/DDR card-type

2012-05-09T14:03:21+00:00

Current implementation decides the card type exclusively. Even though
eMMC device can support both HS200 and DDR mode, card type will be
set only for HS200. If the host doesn't support HS200 but has DDR
capability, then DDR mode can't be selected.

Signed-off-by: Seungwon Jeon 
Reviewed-by: Subhash Jadavani 
Signed-off-by: Chris Ball