Enable channel in device_issue_pending call, so that the order between
cookie assignment and channel enabling can be ensured naturally.
It fixes the mxs gpmi-nand breakage which is caused by the incorrect
order of cookie assigning and channel enabling.
Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Huang Shijie <b32955@freescale.com>
Tested-by <samgandhi9@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Artem's cleanup of the MTD API continues apace.
Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst others.
More work on DiskOnChip G3, new driver for DiskOnChip G4.
Clean up debug/warning printks in JFFS2 to use pr_<level>.
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Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6
Pull MTD changes from David Woodhouse:
- Artem's cleanup of the MTD API continues apace.
- Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst
others.
- More work on DiskOnChip G3, new driver for DiskOnChip G4.
- Clean up debug/warning printks in JFFS2 to use pr_<level>.
Fix up various trivial conflicts, largely due to changes in calling
conventions for things like dmaengine_prep_slave_sg() (new inline
wrapper to hide new parameter, clashing with rewrite of previously last
parameter that used to be an 'append' flag, and is now a bitmap of
'unsigned long flags').
(Also some header file fallout - like so many merges this merge window -
and silly conflicts with sparse fixes)
* tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6: (120 commits)
mtd: docg3 add protection against concurrency
mtd: docg3 refactor cascade floors structure
mtd: docg3 increase write/erase timeout
mtd: docg3 fix inbound calculations
mtd: nand: gpmi: fix function annotations
mtd: phram: fix section mismatch for phram_setup
mtd: unify initialization of erase_info->fail_addr
mtd: support ONFI multi lun NAND
mtd: sm_ftl: fix typo in major number.
mtd: add device-tree support to spear_smi
mtd: spear_smi: Remove default partition information from driver
mtd: Add device-tree support to fsmc_nand
mtd: fix section mismatch for doc_probe_device
mtd: nand/fsmc: Remove sparse warnings and errors
mtd: nand/fsmc: Add DMA support
mtd: nand/fsmc: Access the NAND device word by word whenever possible
mtd: nand/fsmc: Use dev_err to report error scenario
mtd: nand/fsmc: Use devm routines
mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platform
mtd: fsmc_nand: add pm callbacks to support hibernation
...
[1] Background :
The GPMI does ECC read page operation with a DMA chain consist of three DMA
Command Structures. The middle one of the chain is used to enable the BCH,
and read out the NAND page.
The WAIT4END(wait for command end) is a comunication signal between
the GPMI and MXS-DMA.
[2] The current DMA code sets the WAIT4END bit at the last one, such as:
+-----+ +-----+ +-----+
| cmd | ------------> | cmd | ------------------> | cmd |
+-----+ +-----+ +-----+
^
|
|
set WAIT4END here
This chain works fine in the mx23/mx28.
[3] But in the new GPMI version (used in MX50/MX60), the WAIT4END bit should
be set not only at the last DMA Command Structure,
but also at the middle one, such as:
+-----+ +-----+ +-----+
| cmd | ------------> | cmd | ------------------> | cmd |
+-----+ +-----+ +-----+
^ ^
| |
| |
set WAIT4END here too set WAIT4END here
If we do not set WAIT4END, the BCH maybe stalls in "ECC reading page" state.
In the next ECC write page operation, a DMA-timeout occurs.
This has been catched in the MX6Q board.
[4] In order to fix the bug, rewrite the last parameter of mxs_dma_prep_slave_sg(),
and use the dma_ctrl_flags:
---------------------------------------------------------
DMA_PREP_INTERRUPT : append a new DMA Command Structrue.
DMA_CTRL_ACK : set the WAIT4END bit for this DMA Command Structure.
---------------------------------------------------------
[5] changes to the relative drivers:
<1> For mxs-mmc driver, just use the new flags, do not change any logic.
<2> For gpmi-nand driver, and use the new flags to set the DMA
chain, especially for ecc read page.
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Move the header to a more common place.
The mxs dma engine is not only used in mx23/mx28, but also used
in mx50/mx6q. It will also be used in the future chips.
Rename it to mxs-dma.h, and create a new folder include/linux/fsl/ to
store the Freescale's header files.
change mxs-dma driver, mxs-mmc driver, gpmi-nand driver, mxs-saif driver
to the new header file.
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Acked-by: Chris Ball <cjb@laptop.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Add inline wrappers for device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to hide new parameter from current users of affected interfaces.
Convert current users to use new wrappers instead of direct calls.
Suggested by Russell King [https://lkml.org/lkml/2012/2/3/269].
Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Core:
* Support for the HS200 high-speed eMMC mode.
* Support SDIO 3.0 Ultra High Speed cards.
* Kill pending block requests immediately if card is removed.
* Enable the eMMC feature for locking boot partitions read-only
until next power on, exposed via sysfs.
Drivers:
* Runtime PM support for Intel Medfield SDIO.
* Suspend/resume support for sdhci-spear.
* sh-mmcif now processes requests asynchronously.
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Merge tag 'mmc-merge-for-3.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
MMC highlights for 3.3:
Core:
* Support for the HS200 high-speed eMMC mode.
* Support SDIO 3.0 Ultra High Speed cards.
* Kill pending block requests immediately if card is removed.
* Enable the eMMC feature for locking boot partitions read-only
until next power on, exposed via sysfs.
Drivers:
* Runtime PM support for Intel Medfield SDIO.
* Suspend/resume support for sdhci-spear.
* sh-mmcif now processes requests asynchronously.
* tag 'mmc-merge-for-3.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (58 commits)
mmc: fix a deadlock between system suspend and MMC block IO
mmc: sdhci: restore the enabled dma when do reset all
mmc: dw_mmc: miscaculated the fifo-depth with wrong bit operation
mmc: host: Adds support for eMMC 4.5 HS200 mode
mmc: core: HS200 mode support for eMMC 4.5
mmc: dw_mmc: fixed wrong bit operation for SDMMC_GET_FCNT()
mmc: core: Separate the timeout value for cache-ctrl
mmc: sdhci-spear: Fix compilation error
mmc: sdhci: Deal with failure case in sdhci_suspend_host
mmc: dw_mmc: Clear the DDR mode for non-DDR
mmc: sd: Fix SDR12 timing regression
mmc: sdhci: Fix tuning timer incorrect setting when suspending host
mmc: core: Add option to prevent eMMC sleep command
mmc: omap_hsmmc: use threaded irq handler for card-detect.
mmc: sdhci-pci: enable runtime PM for Medfield SDIO
mmc: sdhci: Always pass clock request value zero to set_clock host op
mmc: sdhci-pci: remove SDHCI_QUIRK2_OWN_CARD_DETECTION
mmc: sdhci-pci: get gpio numbers from platform data
mmc: sdhci-pci: add platform data
mmc: sdhci: prevent card detection activity for non-removable cards
...
This patch converts the drivers in drivers/mmc/host/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Acked-by: David Brown <davidb@codeaurora.org>
Acked-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
The patch converts mxs-mmc driver to clk_prepare/clk_unprepare by
using helper functions clk_prepare_enable/clk_disable_unprepare.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Chris Ball <cjb@laptop.org>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves mmc drivers to use new enum
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Chris Ball <cjb@laptop.org>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
We are cleaning up the implicit presence of module.h; these guys are
some of the people who just assume it will be there. Call it out
explitly for those that really need it.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Fix clock rate setting in the mxs-mmc driver. Previously, if div2 was 0
then the value for TIMING_CLOCK_RATE would have been 255 instead of 0.
The limits for div1 (TIMING_CLOCK_DIVIDE) and div2 (TIMING_CLOCK_RATE+1)
were also not correctly defined.
Can easily be reproduced on mx23evk: default clock for high speed sdio
cards is 50 MHz. With a SSP_CLK of 28.8 MHz default), this resulted in
an actual clock rate of about 56 kHz. Tested on mx23evk.
Signed-off-by: Koen Beel <koen.beel@barco.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This adds the mmc host driver for Freescale MXS-based SoC i.MX23/28.
The driver calls into mxs-dma via generic dmaengine api for both pio
and data transfer.
Thanks Chris Ball for the indentation patch.
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
