kernel.git/drivers/mmc/core/mmc.c, branch linux-3.6.y

mmc: core: reset signal voltage on power up

2012-07-22T19:25:53Z

Add a call to mmc_set_signal_voltage() to set signal voltage to 3.3v in mmc_power_up so that we do not need to touch signal voltage setting in mmc/sd/sdio init functions and rescan function. For mmc/sd cards, when doing a suspend/resume cycle, consider the unsafe resume case, the card will lose its power and when powered on again, we will set signal voltage to 3.3v in mmc_power_up before its resume function gets called, which will re-init the card. And for sdio cards, when doing a suspend/resume cycle, consider the unsafe resume case, the card will either lose its power or not depending on if it wants to wakeup the host. If power is not maintained, it is the same case as mmc/sd cards. If power is maintained, mmc_power_up will not be called and the card's signal voltage will remain at the last setting. Signed-off-by: Aaron Lu Tested-by: Venkatraman S Signed-off-by: Chris Ball

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

2012-07-11T02:47:13Z

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

2012-06-06T13:49:47Z

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: block: Allow disabling 512B sector size emulation

2012-05-17T13:35:21Z

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

2012-05-10T00:47:49Z

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: skip card initialization if power class selection fails

2012-05-09T14:07:12Z

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

2012-05-09T14:04:12Z

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

2012-05-09T14:03:21Z

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

mmc: core: fix power class selection

2012-04-06T00:32:31Z

mmc_select_powerclass() function returns error if eMMC VDD level supported by host is between 2.7v to 3.2v. According to eMMC specification, valid voltage for high voltage cards is 2.7v to 3.6v. This patch ensures that 2.7v to 3.6v VDD range is treated as valid range. Also, failure to set the power class shouldn't be treated as fatal error because even if setting the power class fails, card can still work in default power class. If mmc_select_powerclass() returns error, just print the warning message and go ahead with rest of the card initialization. Signed-off-by: Subhash Jadavani Acked-by: Girish K S Reviewed-by: Namjae Jeon Signed-off-by: Chris Ball

mmc: core: add high-capacity erase size capability flag

2012-03-27T16:20:07Z

Let drivers specify the use of high-capacity erase size. Signed-off-by: Adrian Hunter Signed-off-by: Chris Ball