Commit graph

28 commits

Author SHA1 Message Date
Mariusz Kozlowski
be760a9de8 drivers/mmc/core/host.c: kmalloc + memset conversion to kzalloc
drivers/mmc/core/host.c | 3509 -> 3457 (-52 bytes)
 drivers/mmc/core/host.o | 92400 -> 92136 (-264 bytes)

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-23 06:26:31 +02:00
Mariusz Kozlowski
733cb1e440 drivers/mmc/core/bus.c: kmalloc + memset conversion to kzalloc
drivers/mmc/core/bus.c | 5663 -> 5619 (-44 bytes)
 drivers/mmc/core/bus.o | 70899 -> 70731 (-168 bytes)

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-23 06:26:26 +02:00
Adrian Bunk
393618510d drivers/mmc/core/: make 3 functions static
This patch makes the following needlessly global functions static:
- sd_ops.c: mmc_app_cmd()
- core.c: __mmc_release_bus()
- core.c: mmc_start_request()

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 02:05:57 +02:00
Pierre Ossman
facba9179e mmc: add missing printk levels
Some printk:s were missing an explicit level.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 02:05:49 +02:00
Pierre Ossman
e4d2170874 mmc: proper debugging output in core
Make sure that the debugging output in the core is complete.
This should allow us to clean up all the extra debug output
that each and every other host driver seems to contain.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 02:05:30 +02:00
Pierre Ossman
109b5bed18 mmc: be more verbose about card insertions/removal
Let the user know that the kernel actually detected the card
by printing some basic information in dmesg.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 02:05:04 +02:00
Pierre Ossman
2986d0bf23 mmc: Don't hold lock when releasing an added card
When the card has been added to the device model, it might be bound
to a card driver. Therefore, we have to release the host lock when
trying to remove it as we otherwise might deadlock with the driver.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 01:54:06 +02:00
Pierre Ossman
cf795bfb3a mmc: add a might_sleep() to mmc_claim_host()
In the normal case, the host lock can be claimed directly.
When it cannot, the caller will sleep. Make sure we don't
have any latent bugs by always calling might_sleep().

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 01:53:48 +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
70f10482c6 mmc: update header file paths
Make sure all headers in the files reflect their true position
in the tree.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-26 01:53:31 +02:00
Pierre Ossman
8c75deae1a mmc: fix silly copy-and-paste error
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-09 21:28:09 +02:00
Pierre Ossman
ffce2e7e70 mmc: move layer init and workqueue to core file
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-09 21:28:06 +02:00
Pierre Ossman
b93931a61a mmc: refactor host class handling
Move basic host class device handling to its own file for clarity.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-09 21:28:01 +02:00
Pierre Ossman
4101c16a91 mmc: refactor bus operations
Move bus operations to its own file for the sake of clarity. Also
delegate sysfs attributes to bus handlers in preparation for other
more exotic types.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-07-09 21:27:56 +02:00
Pierre Ossman
c3bff2ec10 mmc: get back read-only switch function
Somehow the code to read the read-only switch of SD cards got lost
in the reorganisation.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-06-13 19:11:20 +02:00
Pierre Ossman
3373c0ae6a mmc: don't call switch on old cards
Make sure we don't call the switch function on cards too old to
support it. They should just ignore it, but some have been reported
to lock up instead.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-06-07 09:25:58 +02:00
Pierre Ossman
71651297a4 mmc: fix broken if clause
Fix a broken if clause which was causing SD cards to go into
4-bit mode even if the host did not support it.

(Reported by David Brownell and Marc Pignat)

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-06-07 09:25:54 +02:00
Andrew Morton
01f41ec7b3 mmc build fix
Cc: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-09 12:30:44 -07:00
Pierre Ossman
1efd48b3ae mmc: use lock instead of claim in debug check
As mmc_detect_change() can be called from irq context, using
claim (which can sleep) is inherently unsafe. Use the host
spinlock instead, which also is faster.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-08 22:42:57 +02:00
Jan Engelhardt
790864dcc2 mmc: Use menuconfig objects
Change Kconfig objects from "menu, config" into "menuconfig" so
that the user can disable the whole feature without having to
enter the menu first.

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-08 22:41:55 +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
Pierre Ossman
6abaa0c9fe mmc: support unsafe resume of cards
Since many have the system root on MMC/SD we must allow some foot
shooting when it comes to resume.

We cannot detect if a card is removed and reinserted during suspend,
so the safe approach would be to assume it was, avoiding potential
filesystem corruption. This will of course not work if you cannot
release the card before suspend.

This commit adds a compile time option that makes the MMC layer
assume the card wasn't touched if it is redetected upon resume.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 16:00:02 +02:00
Pierre Ossman
89a73cf52b mmc: separate out reading EXT_CSD
Separate the reading and decoding of the EXT_CSD register with the
actions taken on it.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 15:08:30 +02:00
Pierre Ossman
1addfcdbe4 mmc: break apart switch function
Break apart the SD switch function into one that reads the capabilities
and one that acts on them.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-01 14:46:08 +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
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
Pierre Ossman
aaac1b470b mmc: Move core functions to subdir
Create a "core" subdirectory to house the central bus handling
functions.

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