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: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Using weight32() to determine if a value is a power of 2 is a rather
heavi weight solution.  The classic idiom is (x & (x - 1)) == 0, but
the kernel already provide a is_power_of_2 function for it.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The PXA has two transmit FIFOes, each32 byte deep.  when one FIFO is
full and the other one has been transmitted, they are automatically
swapped and DMA is triggered for another 32 byte burst.  However, when
there is less than 32 bytes left to send, the FIFO swap has to be done
manually. This is required for some SDIO transfers which are not
required to be multiples of 32 bytes.

A DMA completion interrupt is set for each descriptor which length isn't
a multiple of 32 in order to force the FIFO swap.  While at it, the DMA
interrupt handler has been made a bit more resilient against errors.
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The forcedma and nodma module parameters can be replaced with the quirks
parameter, so remove the redundancy.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Some controllers like ENE712 can't work properly with DMA mode,
add this quirk to force these kinds of HW work with PIO mode
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Many host controllers don't fully follow the PCI spec to claim
whether they support DMA in PCI class register. Leave the driver
to judge it from the Capability register, quirks and module parameter
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Thanks to Matt Domsch and Rezwanul Kabir at Dell, we know how to disable the
MMC controller on the multi-function Ricoh R5C832. The MMC controller needs
to be disabled or it will steal MMC cards from the SD controller where they
would otherwise be supported by the Linux SDHCI driver.
Signed-off-by: NPhilipl Langdale <philipl@overt.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Again, only available from PXA27x.
Signed-off-by: NBridge Wu <mingqiao.wu@gmail.com>
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

From PXA27x, it is possible to do 4-bit data transfers.
Signed-off-by: NBridge Wu <mingqiao.wu@gmail.com>
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

From PXA27x, it is possible to do 2048-byte block transfers.
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Pending interrupts should be determined from both I_REG and I_MASK
registers.
Signed-off-by: NBridge Wu <mingqiao.wu@gmail.com>
Signed-off-by: NNicolas Pitre <nico@marvell.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The patch enables to define MMC host get_ro() method through platform data.
Signed-off-by: NPavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

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: NDavid 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: NPierre Ossman <drzeus@drzeus.cx>

Add support for relaying the sdio interrupt signal from the card.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This kind of transfer is not supported, so don't advertise it and make it
fail early.
Signed-off-by: NMarc Pignat <marc.pignat@hevs.ch>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The MMC_DATA_MULTI flag never had a proper definition of what it
means, so remove it and let the drivers check the block count in
the request.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Remove the BYTEBLOCK capability and let the broken hosts fail the
requests with -EINVAL instead.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Convert the MMC layer to use standard error codes and not its own,
incompatible values.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This patch fixes a bug in AT91 mmc host driver, that enables the wakeup
from suspend on card detection pin even if the card detect pin is not
available (==0). If not card detection pin is defined, IRQ0 == FIQ gets
enabled and if some activity is present on that pin, the system gets a
FIQ request, that causes a crash.
Signed-off-by: NAnti Sullin <anti.sullin@artecdesign.ee>
Signed-off-by: NNicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

When we get unexpected interrupts, also print which interrupt it was.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

It is fully legal for a controller to start issuing data related
interrupts before it has signalled that the command has completed.
Make sure the driver actually can handle this.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Some SDHC cards report an invalid maximum block size, in these cases
assume they support block sizes up to 512 bytes instead of returning
an error.
Signed-off-by: NDavid Vrabel <david.vrabel@csr.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The block count register shouldn't be trusted for single block transfers,
so avoid using it completely when calculating transferred bytes.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Some cleanup with whitespace/tab at the end of lines.
Signed-off-by: NNicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This patch fixes the following section mismatch warnings

...

WARNING: vmlinux.o(.init.text+0x29d40): Section mismatch: reference to .exit.text:wbsd_release_resources (between 'wbsd_init' and 'wbsd_probe')
WARNING: vmlinux.o(.init.text+0x29d49): Section mismatch: reference to .exit.text:wbsd_free_mmc (between 'wbsd_init' and 'wbsd_probe')
WARNING: vmlinux.o(.init.text+0x29f28): Section mismatch: reference to .exit.text:wbsd_free_mmc (between 'wbsd_init' and 'wbsd_probe')

...
Signed-off-by: NGabriel Craciunescu <nix.or.die@googlemail.com>
Acked-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Remove the extra debugging output that now is properly printed
by the core.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Make sure all headers in the files reflect their true position
in the tree.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Added its pci_id and implemented a quirk for it because this
controller needs to reset cmd and data when setting ios.
Signed-off-by: NLeandro Dorileo <dorileo@ossystems.com.br>
Signed-off-by: NOtavio Salvador <otavio@ossystems.com.br>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Some controllers signal "command complete" even on failures (which
they are allowed to do according to the spec). Make sure we check
the error bits first so we don't get any false positives.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

The controller has a bit indicating that one of the higher bits (the
error bits) are set. A previous bug caused this bit to be masked, but
since that bug has been fixed we have to clear it explicictly.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

This piece of code enable the system to be wake-up by a card insertion or removal.
Signed-off-by: NMarc Pignat <marc.pignat@hevs.ch>
Signed-off-by: NNicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

pxamci.h redefines the MMC registers differently so they can be used
with ioremap.  Remove the incompatible definitions from pxa-regs.h.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Fixes hanging using multi block operations (seen during CMD25).
Follows closely the datasheet flowcharts.

This piece of code handles better big file writing. I had to take care
of the notbusy signal during write (at91_mci_handle_cmdrdy function) and
to rearrange the AT91_MCI_ENDRX and AT91_MCI_RXBUFF flag usage.
Signed-off-by: NNicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Typo fix in at91_mci driver : standardized the typo
(at91_mci everywhere)
Signed-off-by: NNicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Whenever a power interrupt is signaled it is also reported as an unexpected
one. All other unexpected interrupts get lost. Cause is a not inversed
bitmask to remove power interrupts from the status.
Signed-off-by: NRolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

ENE has a very weird design where an SDHCI device (0805) is presented
on the PCI bus, but that device is non-functional, and the real device
is hidden as a more generic device.
Signed-off-by: NMilko Krachounov <milko@3mhz.net>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Ignoring OMAP_MMC_STAT_CARD_ERR, treating it as if the command
completed correctly.
Signed-off-by: NRagner Magalhaes <ragner.magalhaes@indt.org.br>
Signed-off-by: NCarlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Signed-off-by: NRobert P. J. Day <rpjday@mindspring.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>