Граф коммитов

100 Коммитов

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David Brownell 5c13941acc MMC: regulator utilities
Glue between MMC and regulator stacks ... verified with
some OMAP3 boards using adjustable and configured-as-fixed
regulators on several MMC controllers.

These calls are intended to be used by MMC host adapters
using at least one regulator per host.  Examples include
slots with regulators supporting multiple voltages and
ones using multiple voltage rails (e.g. DAT4..DAT7 using a
separate supply, or a split rail chip like certain SDIO
WLAN or eMMC solutions).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Acked-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2009-03-31 09:56:26 +01:00
Anton Vorontsov 86e8286a0e mmc: Add mmc_vddrange_to_ocrmask() helper function
This function sets the OCR mask bits according to provided voltage
ranges. Will be used by the mmc_spi OpenFirmware bindings.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-12-31 18:18:13 +01:00
Jarkko Lavinen b30f8af335 mmc: Add 8-bit bus width support
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-12-31 18:18:12 +01:00
Kay Sievers d1b2686308 mmc: struct device - replace bus_id with dev_name(), dev_set_name()
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>
2008-11-08 21:37:46 +01:00
Thomas Petazzoni ee63a7d228 Fix comment in include/linux/mmc/host.h
In include/linux/mmc/host.h, it is mentionned that the callback to
know if a card is present or not is get_ro(). But it's get_cd().

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-10-12 11:04:34 +02:00
Haavard Skinnemoen f4b7f927b5 mmc: Add per-card debugfs support
For each card successfully added to the bus, create a subdirectory under
the host's debugfs root with information about the card.

At the moment, only a single file is added to the card directory for
all cards: "state". It reflects the "state" field in struct mmc_card,
indicating whether the card is present, readonly, etc.

For MMC and SD cards (not SDIO), another file is added: "status".
Reading this file will ask the card about its current status and
return it. This can be useful if the card just refuses to respond to
any commands, which might indicate that the card state is not what the
MMC core thinks it is (due to a missing stop command, for example.)

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:17 +02:00
Haavard Skinnemoen 6edd8ee60a mmc: Export internal host state through debugfs
When CONFIG_DEBUG_FS is set, create a few files under /sys/kernel/debug
containing information about an mmc host's internal state. Currently,
just a single file is created, "ios", which contains information about
the current operating parameters for the bus (clock speed, bus width,
etc.)

Host drivers can add additional files and directories under the host's
root directory by passing the debugfs_root field in struct mmc_host as
the 'parent' parameter to debugfs_create_*.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-27 01:26:16 +02:00
Linus Torvalds 8a0ca91e1d Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (68 commits)
  sdio_uart: Fix SDIO break control to now return success or an error
  mmc: host driver for Ricoh Bay1Controllers
  sdio: sdio_io.c Fix sparse warnings
  sdio: fix the use of hard coded timeout value.
  mmc: OLPC: update vdd/powerup quirk comment
  mmc: fix spares errors of sdhci.c
  mmc: remove multiwrite capability
  wbsd: fix bad dma_addr_t conversion
  atmel-mci: Driver for Atmel on-chip MMC controllers
  mmc: fix sdio_io sparse errors
  mmc: wbsd.c fix shadowing of 'dma' variable
  MMC: S3C24XX: Refuse incorrectly aligned transfers
  MMC: S3C24XX: Add maintainer entry
  MMC: S3C24XX: Update error debugging.
  MMC: S3C24XX: Add media presence test to request handling.
  MMC: S3C24XX: Fix use of msecs where jiffies are needed
  MMC: S3C24XX: Add MODULE_ALIAS() entries for the platform devices
  MMC: S3C24XX: Fix s3c2410_dma_request() return code check.
  MMC: S3C24XX: Allow card-detect on non-IRQ capable pin
  MMC: S3C24XX: Ensure host->mrq->data is valid
  ...

Manually fixed up bogus executable bits on drivers/mmc/core/sdio_io.c
and include/linux/mmc/sdio_func.h when merging.
2008-07-16 15:17:52 -07:00
Benzi Zbit 62a7573ee9 sdio: fix the use of hard coded timeout value.
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>
2008-07-15 15:47:03 +02:00
Pierre Ossman 23af60398a mmc: remove multiwrite capability
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>
2008-07-15 14:14:49 +02:00
Tomas Winkler 6d37333163 mmc: fix sdio_io sparse errors
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>
2008-07-15 14:14:48 +02:00
Pierre Ossman ad3868b2ec mmc,sdio: helper function for transfer padding
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>
2008-07-15 14:14:44 +02:00
Anton Vorontsov 08f80bb519 mmc: change .get_ro() callback semantics
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>
2008-07-15 14:14:41 +02:00
Anton Vorontsov 28f52482b4 mmc: add support for card-detection polling
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 <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:41 +02:00
Adrian Bunk 150a55683b include/linux/mmc/mmc.h: remove CVS tags
This patch removes a CVS tag that wasn't updated for a long time.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2008-07-15 14:14:41 +02:00
Nicolas Pitre cc3000e4ef mmc: remove unused 'mode' from the mmc_host structure
This field and corresponding defines are simply never used anywhere
in the code.  But its mere presence is enough to confuse some host
driver authors who attempt to rely on it.  Let's eliminate the
possibility for confusion and remove it entirely.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-12-12 20:01:01 +01:00
Pierre Ossman 727c26ed78 net: libertas sdio driver
Add driver for Marvell's Libertas 8385 and 8686 wifi chips.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Acked-by: Dan Williams <dcbw@redhat.com>
2007-10-17 22:51:13 +02:00
Pierre Ossman af8350c756 mmc: add led trigger
Add a led trigger for each host controller that indicates if there
is a request active on the controller.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-24 07:15:48 +02:00
David Brownell 97018580c4 MMC headers learn about SPI
Teach the MMC/SD/SDIO system headers that some hosts use SPI mode

 - New host capabilities and status bits
    * MMC_CAP_SPI, with mmc_host_is_spi() test
    * mmc_host.use_spi_crc flag

 - SPI-specific declarations:
    * Response types, MMC_RSP_SPI_R*
    * Two SPI-only commands
    * Status bits used native to SPI:  R1_SPI_*, R2_SPI_*

 - Fix a few (unrelated) whitespace bugs in the headers.

 - Reorder a few mmc_host fields, removing several bytes of padding

None of these changes affect current code.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:37:51 +02:00
Pierre Ossman 759bdc7af4 sdio: store vendor strings
Store vendor strings found in CISTPL_VERS_1 so that function drivers
can access them.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:28:01 +02:00
David Vrabel 7806cdb40f sdio: add sdio_f0_readb() and sdio_f0_writeb()
Add sdio_f0_readb() and sdio_f0_writeb() functions to reading and
writing function 0 registers.  Writes outside the vendor specific CCCR
registers (0xF0 - 0xFF) are not permitted.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:24:27 +02:00
David Vrabel 9a08f82b3c sdio: set the functions' block size
Before a driver is probed, set the function's block size to the default so the
driver is sure the block size is something sensible and it needn't explicitly
set it.

The default block size is the largest that's supported by both the card and
the host, with a maximum of 512 to ensure aribitrarily sized transfer use the
optimal (least) number of commands.

See http://lkml.org/lkml/2007/8/7/150 for reasons for the block size choice.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:19:26 +02:00
David Vrabel 7616ee95f2 sdio: add SDIO_FBR_BASE(f) macro
Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:16:27 +02:00
Nicolas Pitre 17b759aff9 sdio: add interface for host side SDIO interrupt reporting
Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:13:08 +02:00
Pierre Ossman 112c9db91e sdio: support IO_RW_EXTENDED
Support the multi-byte transfer operation, including handlers for
common operations like writel()/readl().

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:09:34 +02:00
Nicolas Pitre d1496c39e5 sdio: core support for SDIO function interrupt
Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 21:01:33 +02:00
Nicolas Pitre 2342f3323c sdio: allow for mmc_claim_host to be aborted
It is sometimes necessary to give up on trying to claim the host lock,
especially if that happens in a thread that has to be stopped.

While at it, fix the description for mmc_claim_host() which was wrong.

Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:55:13 +02:00
Nicolas Pitre 55fe77a0a2 sdio: defines for some standard interface types
Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:54:47 +02:00
Pierre Ossman 3b38bea0d9 sdio: add device id table and matching
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:51:27 +02:00
Pierre Ossman 1a632f8cdc sdio: split up common and function CIS parsing
Add a more clean separation between global, common CIS information
and the function specific one as we need the common information in
places where no specific function is specified.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:44:22 +02:00
Nicolas Pitre b1538bcf75 sdio: link unknown CIS tuples to the sdio_func structure
This way those tuples that the core cares about are consumed by the core
code, and tuples that only function drivers might make sense of are
available to drivers.

Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:31:43 +02:00
Pierre Ossman 0597007f1b sdio: basic parsing of FBR
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:13:52 +02:00
Pierre Ossman 35c66c1908 sdio: read and decode interesting parts of the CCCR
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:12:18 +02:00
Pierre Ossman fa64efa1f2 mmc: enable/disable functions for SDIO
Like many other buses, the devices (functions) on the SDIO bus
must be enabled before they can be used. Add functions that allow
drivers to do so.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 20:10:56 +02:00
Pierre Ossman 46f555f273 mmc: add basic SDIO I/O operations
Add command wrappers that simplify register access from SDIO
function drivers.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 19:57:03 +02:00
Pierre Ossman f76c85154d mmc: add SDIO driver handling
Add basic driver handling to the SDIO device model.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 19:55:26 +02:00
Pierre Ossman e29a7d73f4 mmc: basic SDIO device model
Add the sdio bus type and basic device handling.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 19:45:31 +02:00
Pierre Ossman b2bcc798bb mmc: implement SDIO IO_RW_DIRECT operation
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 19:42:37 +02:00
Pierre Ossman 5c4e6f1301 mmc: detect SDIO cards
Really basic init sequence for SDIO cards.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 19:40:07 +02:00
Pierre Ossman be0192aae1 mmc: remove confusing flag
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: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 09:15:12 +02:00
Pierre Ossman 255d01af9a mmc: remove BYTEBLOCK capability
Remove the BYTEBLOCK capability and let the broken hosts fail the
requests with -EINVAL instead.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 09:15:05 +02:00
Pierre Ossman b146d26a61 mmc: mmc_set_data_timeout() parameter write is redundant
The write parameter in mmc_set_data_timeout() is redundant as the
data structure contains information about the direction of the
transfer.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 09:15:00 +02:00
Pierre Ossman d7604d7635 mmc: read ext_csd version number
Make sure we do not try to parse a structure we do not
understand.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 09:14:53 +02:00
Pierre Ossman 17b0429dde mmc: remove custom error codes
Convert the MMC layer to use standard error codes and not its own,
incompatible values.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-09-23 08:46:48 +02:00
Pierre Ossman 67a61c4847 mmc: update kerneldoc
Make sure the kerneldoc comments are up to date and relevant.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 01:53:39 +02:00
Pierre Ossman bd76631261 mmc: remove old card states
Remove card states that no longer make any sense.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 16:11:57 +02:00
Philip Langdale 55556da012 MMC: Fix handling of low-voltage cards
Fix handling of low voltage MMC cards.

The latest MMC and SD specs both agree that support for
low-voltage operations is indicated by bit 7 in the OCR.
The MMC spec states that the low voltage range is
1.65-1.95V while the SD spec leaves the actual voltage
range undefined - meaning that there is still no such
thing as a low voltage SD card.

However, an old Sandisk spec implied that bits 7.0
represented voltages below 2.0V in 1V or 0.5V increments,
and the code was accordingly written with that expectation.

This confusion meant that host drivers attempting to support
the typical low voltage (1.8V) would set the wrong bits in
the host OCR mask (usually bits 5 and/or 6) resulting in the
the low voltage mode never being used.

This change corrects the low voltage range and adds sanity
checks on the reserved bits (0-6) and for SD cards that
claim to support low-voltage operations.

Signed-off-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 14:14:50 +02:00
Philip Langdale 4be34c99a2 MMC: Consolidate voltage definitions
Consolidate the list of available voltages.

Up until now, a separate set of defines has been
used for host->vdd than that used for the OCR
voltage mask values. Having two sets of defines
allows them to get out of sync and the current
sets are already inconsistent with one claiming
to describe ranges and the other specific voltages.

Only the SDHCI driver uses the host->vdd defines and
it is easily fixed to use the OCR defines.

Signed-off-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 13:42:28 +02:00
Pierre Ossman 7ea239d9e6 mmc: add bus handler
Delegate protocol handling to "bus handlers". This allows the core to
just handle the task of arbitrating the bus. Initialisation and
pampering of cards is now done by the different bus handlers.

This design also allows MMC and SD (and later SDIO) to be more cleanly
separated, allowing easier maintenance.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 13:41:06 +02:00
Pierre Ossman da7fbe58d2 mmc: Separate out protocol ops
Move protocol operations and definitions into their own files
in an effort to separate protocol handling and bus
arbitration more clearly.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 13:04:18 +02:00