kernel.git/drivers/mmc/core/core.c, branch linux-2.6.27.y

mmc: increase SD write timeout for crappy cards

2008-11-13T17:56:04Z

commit 493890e75d98810a3470b4aae23be628ee5e9667 upstream. It seems that some cards are slightly out of spec and occasionally will not be able to complete a write in the alloted 250 ms [1]. Incease the timeout slightly to allow even these cards to function properly. [1] http://lkml.org/lkml/2008/9/23/390 Signed-off-by: Pierre Ossman Signed-off-by: Greg Kroah-Hartman

mmc: properly iterate over sg list in debug check

2008-08-01T17:03:37Z

Signed-off-by: Pierre Ossman

mmc,sdio: helper function for transfer padding

2008-07-15T12:14:44Z

There are a lot of crappy controllers out there that cannot handle all the request sizes that the MMC/SD/SDIO specifications require. In case the card driver can pad the data to overcome the problems, this commit adds a helper that calculates how much that padding should be. A corresponding helper is also added for SDIO, but it can also deal with all the complexities of splitting up a large transfer efficiently. Signed-off-by: Pierre Ossman

mmc: add support for card-detection polling

2008-07-15T12:14:41Z

Some hosts (and boards that use mmc_spi) do not use interrupts on the CD line, so they can't trigger mmc_detect_change. We want to poll the card and see if there was a change. 1 second poll interval seems resonable. This patch also implements .get_cd() host operation, that could be used by the hosts that are able to report card-detect status without need to talk MMC. Signed-off-by: Anton Vorontsov Signed-off-by: Pierre Ossman

mmc: proper prototypes for mmc_attach_*()

2008-04-18T18:05:32Z

This patch adds proper prototypes for mmc_attach_*() in drivers/mmc/core/core.h Signed-off-by: Adrian Bunk Signed-off-by: Pierre Ossman

mmc: make __mmc_release_bus() static

2008-04-18T18:05:32Z

This patch makes the needlessly global __mmc_release_bus() static. Signed-off-by: Adrian Bunk Signed-off-by: Pierre Ossman

cleanup asm/scatterlist.h includes

2007-11-02T07:47:06Z

Not architecture specific code should not #include . This patch therefore either replaces them with #include or simply removes them if they were unused. Signed-off-by: Adrian Bunk Signed-off-by: Jens Axboe

mmc: add led trigger

2007-09-24T05:15:48Z

Add a led trigger for each host controller that indicates if there is a request active on the controller. Signed-off-by: Pierre Ossman

MMC core learns about SPI

2007-09-23T19:51:30Z

Teach the MMC/SD/SDIO core about using SPI mode. - Use mmc_host_is_spi() so enumeration works through SPI signaling and protocols, not just the native versions. - Provide the SPI response type flags with each request issued, including requests from the new lock/unlock code. - Understand that cmd->resp[0] and mmc_get_status() results for SPI return different values than for "native" MMC/SD protocol; this affects resetting, checking card lock status, and some others. - Understand that some commands act a bit differently ... notably: * OP_COND command doesn't return the OCR * APP_CMD status doesn't have an R1_APP_CMD analogue Those changes required some new and updated primitives: - Provide utilities to access two SPI-only requests, and one request that wasn't previously needed: * mmc_spi_read_ocr() ... SPI only * mmc_spi_set_crc() ... SPI only (override by module parm) * mmc_send_cid() ... for use without broadcast mode - Updated internal routines: * Previous mmc_send_csd() modified into mmc_send_cxd_native(); it uses native "R2" responses, which include 16 bytes of data. * Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data() helper for command-and-data access * Bugfix to that mmc_send_cxd_data() code: dma-to-stack is unsafe/nonportable, so kmalloc a bounce buffer instead. - Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper - Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use those helper routines based on whether they're native or SPI The newest categories of cards supported by the MMC stack aren't expected to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO. All those cards support SPI mode, so eventually they should work too. Signed-off-by: David Brownell Signed-off-by: Pierre Ossman

mmc: increase power up delay

2007-09-23T19:26:06Z

Increase delay for power up in order to support some slower boards. Also add some comments about why the delays are there. Signed-off-by: Pierre Ossman