linux-toradex.git/drivers/dma/at_hdmac_regs.h, branch v3.17

dmaengine: at_hdmac: remove unused function

2013-12-13T06:43:41+00:00

commit 54f8d501e8428 ('dmaengine: remove DMA unmap from drivers')
refactored some code which resulted in an unused function in the at_hdmac
driver:

drivers/dma/at_hdmac_regs.h:350:23: warning: 'chan2parent' defined but
    not used [-Wunused-function]

Fixes: 54f8d501e8428 ('dmaengine: remove DMA unmap from drivers')
Signed-off-by: Olof Johansson 
Cc: Bartlomiej Zolnierkiewicz 
Acked-by: Nicolas Ferre 
Acked-by: Bartlomiej Zolnierkiewicz 
Acked-by: Vinod Koul 
Signed-off-by: Dan Williams

DMA: AT91: Get residual bytes in dma buffer

2013-07-05T06:10:31+00:00

Add support for returning the residue for current transfer cookie by
reading the transfered buffer size(BTSIZE) in CTRLA register.

For a single buffer cookie, the descriptor length minus BTSIZE
can get the residue.

For a lli cookie, remain_desc will record remain descriptor length
when last descriptor finish, the remain_desc minus BTSIZE can get the
current residue.

If the cookie has completed successfully, the residue will be zero.
If the cookie is in progress, it will be the number of bytes yet to be transferred.
If get residue error, the cookie will be turn into error status.

Check dma fifo to see if data remain, let issue pending finish remain work if there is.
Signed-off-by: Elen Song 
Signed-off-by: Vinod Koul

DMA: AT91: Get transfer width

2013-07-05T06:10:30+00:00

In one dma transfer, the data transfer width can be configured and it is limited by source or destination peripheral width,
tx_width will save the transfer width, but for memcpy, either source or destination transfer width is taken as tx_width.

Signed-off-by: Elen Song 
Signed-off-by: Vinod Koul

at_hdmac: move to generic DMA binding

2013-04-30T08:47:41+00:00

Update at_hdmac driver to support generic DMA device tree binding. Devices
can still request channel with dma_request_channel() then it doesn't break
DMA for non DT boards.

Signed-off-by: Ludovic Desroches 
Acked-by: Nicolas Ferre 
Acked-by: Jean-Christophe PLAGNIOL-VILLARD 
Acked-by: Arnd Bergmann 
Signed-off-by: Vinod Koul

dma: Convert dev_printk(KERN_ to dev_(

2013-01-08T06:04:56+00:00

dev_ calls take less code than dev_printk(KERN_
and reducing object size is good.
Coalesce formats for easier grep.

Signed-off-by: Joe Perches 
Signed-off-by: Vinod Koul

ARM: at91: move platform_data definitions

2012-09-14T09:16:40+00:00

Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the at91 include directories

Signed-off-by: Arnd Bergmann 
Acked-by: Mark Brown 
Acked-by: Greg Kroah-Hartman 
Acked-by: Nicolas Pitre 
Acked-by: Nicolas Ferre 
Acked-by: Vinod Koul 
Cc: Jean-Christophe Plagniol-Villard 
Cc: Dan Williams

dmaengine: at_hdmac: take maxburst from slave configuration

2012-05-15T03:17:18+00:00

The maxburst/chunk size was taken from the private slave DMA data structure.
Use the common API provided by DMA_SLAVE_CONFIG to setup src/dst maxburst
values.
The ctrla field is not needed anymore in the slave private structure nor the
header constants that were located in an architecture specific directory.
The at91sam9g45_devices.c file that was using this platform data is also
modified to remove this now useless data.

Signed-off-by: Nicolas Ferre 
Signed-off-by: Vinod Koul

dmaengine: at_hdmac: add slave config operation

2012-03-21T15:42:29+00:00

This patch introduces DMA_SLAVE_CONFIG to at_hdmac Atmel DMA driver.

It is needed to fix a regression in the use of atmel-mci.c driver on Atmel
AT91 platforms brouth by e2b35f3:
"dmaengine/dw_dmac: Fix dw_dmac user drivers to adapt to slave_config changes"

We remove some parts of the private structure "at_dma_slave" and use the
information provided by "struct dma_slave_config": source/destination
peripheral registers and access width.

AT_DMA_SLAVE_WIDTH_* values used previously are not needed anymore as we
now use the standard ones. Although some conversion functions are needed to
match register expected values.

Some AT91 sub-architecture specific files are slightly touched by this patch
but it cannot be split because it can break compilation.

Signed-off-by: Nicolas Ferre 
Signed-off-by: Vinod Koul

dmaengine: move last completed cookie into generic dma_chan structure

2012-03-13T06:06:06+00:00

Every DMA engine implementation declares a last completed dma cookie
in their private dma channel structures.  This is pointless, and
forces driver specific code.  Move this out into the common dma_chan
structure.

Signed-off-by: Russell King 
Tested-by: Linus Walleij 
Reviewed-by: Linus Walleij 
Acked-by: Jassi Brar 
[imx-sdma.c & mxs-dma.c]
Tested-by: Shawn Guo 
Signed-off-by: Vinod Koul

at_hdmac: bugfix for enabling channel irq

2012-01-31T03:39:04+00:00

commit 463894705e4089d0ff69e7d877312d496ac70e5b deleted redundant
chan_id and chancnt initialization in dma drivers as this is done
in dma_async_device_register().

However, atc_enable_irq() relied on chan_id set before registering
the device, what left only channel 0 functional for this driver.

This patch introduces atc_enable/disable_chan_irq() as a variant
of atc_enable/disable_irq() with the channel as explicit argument.

Signed-off-by: Nikolaus Voss 
Signed-off-by: Nicolas Ferre 
Cc: stable 
Signed-off-by: Vinod Koul