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Signed-off-by: Sascha Sommer <saschasommer@freenet.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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This adds reading and using of enable_timeout from the CIS
Signed-off-by: Benzi Zbit <benzi.zbit@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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This comment update got lost in the great floo^Wmerge. As Pierre
pointed out, no one knows what 'CaFe' is.
Signed-off-by: Andres Salomon <dilinger@debian.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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>
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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: Pierre Ossman <drzeus@drzeus.cx>
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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=682
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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This patch fix warning :shadowing dma variable
and made use of module_param_named instead of module_param
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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mmc_detect_change() takes jiffies, not msecs. Convert the
previous value of msecs into jiffies before calling.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Add MODULE_ALIAS() declerations for all the supported platform
devices for this driver.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Add support to the S3C24XX MMC driver to have the card detect be on
a pin that is not IRQ capable.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Fix a crash if host->mrq->data is NULL on ending a transfer.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Support for inverting the sense of the MMC driver's write
protect detection line.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Fix Bug #677 - I/O errors on heavy microSD writes for 2.6.22.x.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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is stopped.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Harald Welte <laforge@openmoko.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Bugfix to ensure DMA channel allocated is freed on exit.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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This patch is a workaround of some S3C2410 MMC chip bug
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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This is the latest S3C MMC/SD driver by Thomas Kleffel
with cleanups as suggested by AKPM done by Ben Dooks.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Thomas Kleffel <tk@maintech.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Be a bit more robust and fall back to PIO if someone is feeding us
bogus addresses.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Clean up and reorganise the mmc_test driver so that it (hopefully)
is easier to extend with more complex tests.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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: Pierre Ossman <drzeus@drzeus.cx>
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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: Pierre Ossman <drzeus@drzeus.cx>
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The upcoming JMicron chips will have solved all the currently known
bugs, so don't penalize them for older problems.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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We can only perform the tests on MMC and SD cards, so avoid binding
to any other type.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Make sure that the maximum size for a byte mode transfer is identical
in all places. Also tweak the transfer helper so that a single byte
mode transfer is preferred over (possibly multiple) block mode
request(s).
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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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 <drzeus@drzeus.cx>
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The MMC core provides a carddetect poll feature, time to
remove the driver's own implementation of it.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Don't process an MMC request if no card is present.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Clean up the codebase, no functional changes.
- merge the au1xmmc.h header contents into the driver file,
- indentation, spelling and style fixes.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Wire up the SD controllers' SDIO IRQ capability.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Remove the DB1200 board-specific functions (card present, read-only,
activity LED methods) and instead add platform data which is passed
to the driver. This also allows for platforms to implement other
carddetect schemes (e.g. dedicated irq) without having to pollute the
driver code. The poll timer (used for pb1200) is kept for compatibility.
With the board-specific stuff gone, the driver's ->probe() code can be
cleaned up considerably.
Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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The byte mode support fails to clear the byte mode bit in the command
register, possibly leaving byte mode enabled with the counters programmed
in non-byte mode.
Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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According to the documentation the AT91SAM9261 MCI shares the block size
limitations of the AT91RM9200 MCI. Also the errata documentation for
AT91RM9200 and AT91SAM9261 state that stream commands are not supported.
This has not been tested on actual hardware.
Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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AT91SAM926[0/3] PDC must write at least 12 bytes. The code compiles and runs
but the actual condition for this erratum did not trigger in my tests so it's
unclear if it actually works as intended.
Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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In at91_mci_completed_command() function, this patch distinguishes
command error and data error. It reports it in the corresponding
error field.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Reading AT91_MCI_SR again at the end of transfer can corrupt the
error reporting. Some fields in the SR register are read-and-clear.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Enable SDIO interrupt handling.
Signed-off-by: Eric Benard <ebenard@free.fr>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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at91_mci is capable of multiwrite. Enable it before it disappears.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Modify bytes_xfered value after a write.
That will report, as accurately as possible, the amount of
sectors that are effectively written.
This update introduces the check of the busy signal given by
the card.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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The at91 mci controller internal state machine seems to often crash. This can
be fixed by resetting the controller after each command for at91rm9200 and by
setting the MCI_BLKR register on at91sam926*.
Signed-off-by: Marc Pignat <marc.pignat@hevs.ch>
Signed-off-by: Hans J Koch <hjk@linutronix.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Detect command timeout (or mci controller hangs).
Signed-off-by: Marc Pignat <marc.pignat@hevs.ch>
Signed-off-by: Hans J Koch <hjk@linutronix.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Implement transfer with size not modulo 4 for at91sam9*. Please note that the
at91rm9200 simply can't handle this.
Signed-off-by: Marc Pignat <marc.pignat@hevs.ch>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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