Especially with Sandisk SDHC cards, the second SWITCH command was failing
with a timeout and the card was not recognized at all. However if the
system was busy, or debugging was enabled, or a udelay(100) was inserted
before the second SWITCH command in the core code, then the timing was
so that the card started to work.
With some unusual block sizes, the data FIFO status doesn't indicate a
"empty" state right away when the data transfer is done. Queuing
another data transfer in that condition results in a transfer timeout.
The empty FIFO bit eventually get set by itself in less than 50 usecs
when it is not set right away. So let's just poll for that bit before
configuring the controller with a new data transfer.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Empirical evidences show that this is causing far more problems than it
solves when this mode is enabled in the host hardware. Amongst those
cards that are known to be non functional when this bit is set are:
A-Data "Speedy" 2GB SD card
Kodak 512MB SD card
Ativa 1GB MicroSD card
Marvell 8688 (WIFI/Bluetooth) SDIO card
Since those cards do work on other host controllers which do honnor the
hs timing, the issue must be with this particular host hardware.
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
disable_irq() should wait for all running handlers to complete
before returning. As such, if it's used to disable an interrupt
from that interrupt's handler it will deadlock. This replaces
the dangerous instances with the _nosync() variant which doesn't
have this problem.
Signed-off-by: Ben Nizette <bn@niasdigital.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
We plan to use fsl,esdhc going forward as the base compatible so update
the driver to bind against it.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
When a software timeout occurs in polling mode hardware was left in
an indeterminate state causing subsequent operations to block.
Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
This is a temporary workaround until the MMC stack can be fixed.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
The second argument of the probe method points to the amba_id
structure, so it's better passed with the correct type. None of the
current in-tree drivers uses the pointer, so they have only been
checked for a clean compile.
Change suggested by Russell King.
Signed-off-by: Alessandro Rubini <rubini@unipv.it>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
mvsdio: fix CONFIG_PM=y build
mmci: fix crash with debug enabled
sdhci: catch ADMA errors
mmc: increase power up delay
sdhci-pci: bad error handling in probe function
mmc_block: be prepared for oversized requests
Fix usage of obsolete parameters and functions in the driver's PM
callbacks.
Signed-off-by: Rabin Vincent <rabin@rab.in>
Acked-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
If MMC debugging is enabled, the mmci driver oopses because the DBG
macro uses host->mmc before it is set. Set it earlier.
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
The goto unmap is too early, we haven't allocated host or done the
request_region().
Found by smatch (http://repo.or.cz/w/smatch.git).
[ Second error path fix by Pierre Ossman ]
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
A very large subset of SD cards in the market send their
responses and data non-byte-aligned. So add logic to the
mmc spi driver to handle this mess.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
With spurious interrupt cmd can be null even when we have CC
set in irq status.
Fixes: NB#106295 - prevent potential kernel crash in the MMC driver
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
This fixes the issue noted by Russell King:
drivers/mmc/host/omap_hsmmc.c: In function 'mmc_omap_xfer_done':
drivers/mmc/host/omap_hsmmc.c:301: error: implicit declaration of function 'mmc_omap_fclk_lazy_disable'
This got broken by 4a694dc915.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
SD/MMC card timeouts can be very high. So avoid busy-waiting,
using the scheduler. Calculate all timeouts in jiffies units,
because this will give us the correct sign when to involve
the scheduler.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
Spurious IRQs seen on MMC after 2.6.29. Flush posted write in IRQ
handler.
The interrupt line is released by clearing the error status bits
in the MMCHS_STAT register, which must occur before the interrupt
handler returns to avoid unwanted irqs. Hence the need to flush
the posted write.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Tony Lindgen <tony@atomide.com>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>
DMA request source (RSSR) needs to be set only once (in probe).
DMA burst length (BLR) need to be set only in set_ios()
This cleans up imxmci_setup_data() and should make it a little
bit faster :)
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Add __init __exit for appropriate probe and remove functions.
Conver to platform_driver_probe()
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)
Signed-off-by: Yang Hongyang<yanghy@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (42 commits)
atmel-mci: fix sdc_reg typo
tmio_mmc: add maintainer
mmc: Add OpenFirmware bindings for SDHCI driver
sdhci: Add quirk for forcing maximum block size to 2048 bytes
sdhci: Add quirk for controllers that need IRQ re-init after reset
sdhci: Add quirk for controllers that need small delays for PIO
sdhci: Add set_clock callback and a quirk for nonstandard clocks
sdhci: Add get_{max,timeout}_clock callbacks
sdhci: Add support for hosts reporting inverted write-protect state
sdhci: Add support for card-detection polling
sdhci: Enable only relevant (DMA/PIO) interrupts during transfers
sdhci: Split card-detection IRQs management from sdhci_init()
sdhci: Add support for bus-specific IO memory accessors
mmc_spi: adjust for delayed data token response
omap_hsmmc: Wait for SDBP
omap_hsmmc: Fix MMC3 dma
omap_hsmmc: Disable SDBP at suspend
omap_hsmmc: Do not prefix slot name
omap_hsmmc: Allow cover switch to cause rescan
omap_hsmmc: Add 8-bit bus width mode support
...
This fixes a bug when setting the sdc_reg for 4-bit bus width
transactions.
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This patch adds a new driver: sdhci-of. The driver is similar to
the sdhci-pci, it contains common probe code, and controller-specific
ops and quirks.
So far there are only Freescale eSDHC ops and quirks.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
FSL eSDHC controllers can support maximum block size up to 4096 bytes,
the MBL (Maximum Block Length) field in the capabilities register
extended by one bit, and is set to 0x3.
But the SDHCI core doesn't support blocks of 4096 bytes, and thus
forces blksz to the lowest value -- 512 bytes. With this patch we can
pin up the blksz to the maximum supported block size, i.e. 2048 bytes.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
FSL eSDHC controllers losing signal/interrupt enable states after
reset, so we should re-enable them.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Small udelay is needed to make eSDHC work in PIO mode. Without
the delay reading causes endless interrupt storm, and writing
corrupts data. The first guess would be that we must wait for
some bit in some register, but I didn't find any reliable bits
that change before and after the delay.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
FSL eSDHC hosts have incompatible register map to manage the SDCLK.
This patch adds set_clock callback so that drivers could overwrite
set_clock behaviour.
Similar patch[1] was posted by Ben Dooks, though in Ben's version the
callback is named change_clock, plus the patch has some unrelated bits
that makes the patch difficult to reuse.
[1] http://lkml.org/lkml/2008/12/2/160
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Some controllers do not provide clock information in their capabilities
(in the Samsung case, it is because there are multiple clock sources
available to the controller). Add hooks to allow the system to supply
clock information.
p.s.
In the original Ben's patch there was a bug that makes sdhci_add_host()
return -ENODEV even if callbacks were specified. This is fixed now.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This patch adds SDHCI_QUIRK_INVERTED_WRITE_PROTECT quirk. When
specified, the sdhci driver will invert WP state.
p.s. Actually, the quirk is more board-specific than
controller-specific.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This patch adds SDHCI_QUIRK_BROKEN_CARD_DETECTION quirk. When specified,
sdhci driver will set MMC_CAP_NEEDS_POLL MMC host capability, and won't
enable card insert/remove interrupts.
This is needed for hosts with unreliable card detection, such as FSL
eSDHC. The original eSDHC driver was tring to "debounce" card-detection
IRQs by reading present state and disabling particular interrupts. But
with this debouncing scheme I noticed that sometimes we miss card
insertion/removal events.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Some hosts (that is, FSL eSDHC) throw PIO interrupts during DMA
transfers, this causes tons of unneeded interrupts, and thus highly
degraded speed.
This patch modifies the driver so that now we only enable relevant
(DMA or PIO) interrupts during transfers.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Card detection interrupts should be handled separately as they should
not be enabled before mmc_add_host() returns and should be disabled
before calling mmc_remove_host(). The same is for suspend and resume
routines.
sdhci_init() no longer enables card-detection irqs. Instead, two new
functions implemented: sdhci_enable_card_detection() and
sdhci_disable_card_detection().
New sdhci_reinit() call implemented to behave the same way as the old
sdhci_init().
Also, this patch implements and uses few new helpers to manage IRQs in
a more conveinient way, that is:
- sdhci_clear_set_irqs()
- sdhci_unmask_irqs()
- sdhci_mask_irqs()
- SDHCI_INT_ALL_MASK constant
sdhci_enable_sdio_irq() converted to these new helpers, plus the
helpers will be used by the subsequent patches.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Currently the SDHCI driver works with PCI accessors (write{l,b,w} and
read{l,b,w}).
With this patch drivers may change memory accessors, so that we can
support hosts with "weird" IO memory access requirments.
For example, in "FSL eSDHC" SDHCI hardware all registers are 32 bit
width, with big-endian addressing. That is, readb(0x2f) should turn
into readb(0x2c), and readw(0x2c) should be translated to
le16_to_cpu(readw(0x2e)).
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Some cards are not able to send the data token in time, but
miss the time frame for some bits(!). So synchronize to the
start of the token.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
It is necessary to wait for bus power before sending
any commands.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Data transfers on third OMAP3 MMC controller don't work
because DMA line numbers are only defined for MMC1 and MMC2.
Fix that and store line numbers in mmc_omap_host structure
to reduce code size.
Tested on OMAP3 pandora board.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Turn off the bus power at suspend.
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Allow slot_name to be the same as the other OMAP
driver, by removing the redundant "slot:" prefix.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Allow a cover switch to be used to cause a rescan of the
MMC slot.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Instead of using the bounce buffer, using scatter-gather emulation
(as in the OMAP1/2 MMC driver) removes the need of one extra memory
copy and improves performance.
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
