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path: root/drivers/mmc/host/mmc_spi.c
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2008-12-31mmc_spi: Add support for OpenFirmware bindingsAnton Vorontsov1-1/+3
The support is implemented via platform data accessors, new module (of_mmc_spi) will be created automatically when the driver compiles on OpenFirmware platforms. Link-time dependency will load the module automatically. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-11-08mmc: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers1-1/+1
Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-Off-By: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12MMC: Use timeout values from CSRMatthew Fleming1-11/+21
Hard-coded timeout values of 250ms for writes and 100ms for reads are currently used for MMC transactions over SPI. The spec states that the timeout values from the card should be used. Signed-off-by: Matthew Fleming <matthew.fleming@imgtec.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-24mmc_spi: put signals to low power off fixJan Nikitenko1-1/+2
The original intention was to write a zero byte to mmc to force spi signals to low when doing power off. Somehow the spi_w8r8 call got there so a read followed the write of single zero byte. This patch changes that to simple write of zero byte without the following read. This way the power off is more reliable and completely sufficient. Signed-off-by: Jan Nikitenko <jan.nikitenko@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15mmc: remove multiwrite capabilityPierre Ossman1-4/+1
Relax requirements on host controllers and only require that they do not report a transfer count than is larger than the actual one (i.e. a lower value is okay). This is how many other parts of the kernel behaves so upper layers should already be prepared to handle that scenario. This gives us a performance boost on MMC cards. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15mmc: change .get_ro() callback semanticsAnton Vorontsov1-3/+6
Now get_ro() callback must return 0/1 values for its logical states, and negative errno values in case of error. If particular host instance doesn't support RO/WP switch, it should return -ENOSYS. This patch changes some hosts in two ways: 1. Now functions should be smart to not return negative values in "RO asserted" case (particularly gpio_ calls could return negative values for the outermost GPIOs). Also, board code usually passes get_ro() callbacks that directly return gpioreg & bit result, so at91_mci, imxmmc, pxamci and mmc_spi's get_ro() handlers need take special care when returning platform's values to the mmc core. 2. In case of host instance didn't implement get_ro() callback, it should really return -ENOSYS and let the mmc core decide what to do about it (mmc core thinks the same way as the hosts, so it isn't functional change). Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15mmc_spi: add support for card-detection pollingAnton Vorontsov1-2/+17
This patch adds new platform data variable "caps", so platforms could pass theirs capabilities into MMC core (for example, platforms without interrupt on the CD line will most probably want to pass MMC_CAP_NEEDS_POLL). New platform get_cd() callback provided to optimize polling. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-04-29mmc: use get/put_unaligned_* helpersHarvey Harrison1-1/+1
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Tony Jones <tonyj@suse.de> Cc: Pierre Ossman <drzeus@drzeus.cx> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-12-05spi: use simplified spi_sync() calling conventionMarc Pignat1-10/+0
Given the patch which simplifies the spi_sync calling convention, this one updates the callers of that routine which tried using it according to the previous specification. (Most didn't.) Signed-off-by: Marc Pignat <marc.pignat@hevs.ch> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-27mmc_spi: Fix mmc-over-spi regressionDavid Brownell1-19/+33
Patch 49dce689ad4ef0fd1f970ef762168e4bd46f69a3 changed the sysfs data structures for SPI in a way which broke the MMC-over-SPI host driver. This patch fixes that regression by changing the scheme used to keep from knowingly trying to use a shared bus segment, and updates the adjacent comments slightly to better explain the issue. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-10-22[SG] Update drivers to use sg helpersJens Axboe1-4/+4
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-17missing include in mmcAl Viro1-0/+1
AFAICS, fallout from repacing include of blkdev.h with include of bio.h. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16spi doesn't need class_deviceTony Jones1-2/+2
Make the SPI framework and drivers stop using class_device. Update docs accordingly ... highlighting just which sysfs paths should be "safe"/stable. Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-15Fix compile while compiling drivers/mmc/host/mmc_spi.o with !BLOCKDavid Brownell1-1/+1
Make sure the mmc_spi driver can build without CONFIG_BLOCK. Issue noted by "Avuton Olrich" <avuton@gmail.com> and randconfig. While that won't be a common configuration, sometimes embedded boards use SDIO to interface WLAN or Bluetooth chips (vs some parallel interface), and don't provide an MMC/SD socket for use with flash memory cards. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-09-24mmc_spi host driverDavid Brownell1-0/+1408
This is the latest version of the MMC-over-SPI support. It works on 2.6.23-rc2 plus git-mmc (from rc1-mm2), along with the preceding patches which teach the rest of the MMC stack about SPI. The main issue of note is that sometimes cards need to be power cycled to recover after certain faults. Also, it may sometimes be necessary to disable CRCs. ("modprobe mmc_core use_spi_crc=n") Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: mikael.starvik@axis.com, Cc: Hans-Peter Nilsson <hp@axis.com> Cc: Jan Nikitenko <jan.nikitenko@gmail.com> Cc: Mike Lavender <mike@steroidmicros.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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