Make it a bit more obvious that the card has been claimed by the
mmc_test driver so that people don't have to wonder why their block
device never shows up.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Support highmem pages in the bounce buffer code by using the
sg_copy_from/to_buffer() functions.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Commit c8b3e02e renamed a variable, but missed one reference to it
inside a WARN_ON, causing it to incorrectly trigger.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The ADMA code path assumes that the 3 byte alignment fix doesn't cross
a page boundary. I'm not convinced this is worth supporting, but at
least print a warning in the off chance we'll actually see such a request.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Add tests that make sure the driver properly checks the blocks and
blksz fields and doesn't assume the sg list has a size that perfectly
matches the current request.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Add a couple of tests to make sure the host driver handles highmem
memory pages properly. Unfortunately there is no way to guarantee an
allocation below 4 GB in i386, so it might give you addresses that
are out of reach for the hardware (OTOH, so will any other highmem
allocation in the kernel).
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Ensure that the s3cmci host controller is turned off
when the machine is shutdown, otherwise we end up
leaving the card powered and processing insertion and
removal events after the system prints "System halted."
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Basic suspend/resume support: disable peripheral on suspend and
reinit on resume.

Tested on Au1200.
Signed-off-by: NManuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Fix the naming of various functions in the s3cmc
driver to stop triggering section mismatch warnings.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Signed-off-by: NKarl Beldan <karl.beldan@gmail.com>
Acked-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This is a consequence of patch 9ea761bfef52c116fed4715d4043392c2503fe6a.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Signed-off-by: NSascha Sommer <saschasommer@freenet.de>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Unfold nested macros it creates not readable code and
sparse warnings
sdio_io.c:190:9: warning: symbol '_min1' shadows an earlier one
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This adds reading and using of enable_timeout from the CIS
Signed-off-by: NBenzi Zbit <benzi.zbit@intel.com>
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This comment update got lost in the great floo^Wmerge.  As Pierre
pointed out, no one knows what 'CaFe' is.
Signed-off-by: NAndres Salomon <dilinger@debian.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

1. sdhci_prepare_data: fix shadowing of count variable
	u8 count
	int count -> sg_cnt;
2.  sdhci_add_host: assignment of integer to pointer
	dma_mask = 0 -> dma_mask = NULL;
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

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: NPierre Ossman <drzeus@drzeus.cx>

DMA addresses are not pointers, so don't treat them as such. Avoids
compiler warnings when using 64-bit DMA addresses on a 32-bit system.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This is a driver for the MMC controller on the AP7000 chips from
Atmel. It should in theory work on AT91 systems too with some
tweaking, but since the DMA interface is quite different, it's not
entirely clear if it's worth merging this with the at91_mci driver.

This driver has been around for a while in BSPs and kernel sources
provided by Atmel, but this particular version uses the generic DMA
Engine framework (with the slave extensions) instead of an
avr32-only DMA controller framework.

This driver can also use PIO transfers when no DMA channels are
available, and for transfers where using DMA may be difficult or
impractical for some reason (e.g. the DMA setup overhead is usually
not worth it for very short transfers, and badly aligned buffers or
lengths are difficult to handle.)

Currently, the driver only support PIO transfers. DMA support has been
split out to a separate patch to hopefully make it easier to review.

The driver has been tested using mmc-block and ext3fs on several SD,
SDHC and MMC+ cards. Reads and writes work fine, with read transfer
rates up to 3.5 MiB/s on fast cards with debugging disabled.

The driver has also been tested using the mmc_test module on the same
cards. All tests except 7, 9, 15 and 17 succeed. The first two are
unsupported by all the cards I have, so I don't know if the driver
handles this correctly. The last two fail because the hardware flags a
Data CRC Error instead of a Data Timeout error. I'm not sure how to deal
with that.

Documentation for this controller can be found in many data sheets from
Atmel, including the AT32AP7000 data sheet which can be found here:

http://www.atmel.com/dyn/products/datasheets.asp?family_id=682Signed-off-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This patch fixes sdio_io sparse errors.
This fix changes signature of API functions,
changing
unsigned char -> u8
unsigned short -> u16
unsigned long -> u32 - this was probably a bug in 64 bit platforms
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This patch fix warning :shadowing dma variable
and made use of module_param_named instead of module_param
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The hardware does not support any multi-block transfers
with an block-size that is not 32bit aligned. Also the driver
itself does not support single block non-32bit transfers
either.

Ensure that the s3cmci_setup_data() returns the appropriate
error if we encounter this.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Add better debugging to show where errors are being
generated, as some error codes can come from several
different code paths.

Also fix the error return path from s3cmci_setup_data()
to return the error it returned to the request.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Ensure that we have physical media present before attempting to
send a request to a card. This ensures that we do not get flooded
by errors from commands that can never be completed timing out.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

mmc_detect_change() takes jiffies, not msecs. Convert the
previous value of msecs into jiffies before calling.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Add MODULE_ALIAS() declerations for all the supported platform
devices for this driver.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The driver should be checking for a negative error code from
s3c2410_dma_request(), not non-zero. Newer kernels now return
the DMA channel number that was allocated by the request.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Add support to the S3C24XX MMC driver to have the card detect be on
a pin that is not IRQ capable.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Fix a crash if host->mrq->data is NULL on ending a transfer.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Support for inverting the sense of the MMC driver's write
protect detection line.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This patch adds platform data support to the s3mci driver.  This allows
flexible board-specific configuration of set_power, card detect and read only
pins.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Fix Bug #677 - I/O errors on heavy microSD writes for 2.6.22.x.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

is stopped.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NHarald Welte <laforge@openmoko.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Bugfix to ensure DMA channel allocated is freed on exit.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This patch is a workaround of some S3C2410 MMC chip bug
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This is the latest S3C MMC/SD driver by Thomas Kleffel
with cleanups as suggested by AKPM done by Ben Dooks.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
Signed-off-by: NThomas Kleffel <tk@maintech.de>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Be a bit more robust and fall back to PIO if someone is feeding us
bogus addresses.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Clean up and reorganise the mmc_test driver so that it (hopefully)
is easier to extend with more complex tests.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Many failures are non-permanent, but the card might need some time to
finish what it is doing before becoming responsive again. Make sure we
wait for it to finish programming before dealing with the error.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Add support for the scatter-gather DMA mode present on newer controllers.
As the mode requires 32-bit alignment, non-aligned chunks are handled by
using a bounce buffer.

Also add some new quirks to handle controllers that have bugs in the
ADMA engine.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>