linux-toradex.git/include/linux/sh_dma.h, branch v4.4.93

dmaengine: shdma: Add more register documentation

2014-07-09T08:55:57+00:00

Also add a few definitions that were missing.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Simon Horman

DMA: shdma: remove private and unused defines from a global header

2013-08-27T08:55:27+00:00

Macros, named like TEND or SAR lack a namespace and are too broadly named
for a global header. Besides, they aren't needed globally. Move them to
where they belong - into the driver. Some other macros aren't used at all,
remove them.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Vinod Koul

DMA: shdma: support the new CHCLR register layout

2013-08-27T08:54:07+00:00

On newer r-car SoCs the CHCLR register only contains one bit per channel,
to which a 1 has to be written to reset the channel. Older SoC versions had
one CHCLR register per channel, to which a 0 must be written to reset the
channel and clear its buffers. This patch adds support for the newer
layout.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Vinod Koul

DMA: shdma: shdma_chan_filter() has to be in shdma-base.h

2013-07-05T06:10:59+00:00

shdma_chan_filter() is a function, provided by the shdma-base.c module,
move its declaration to the appropriate header.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Vinod Koul

dma: sh: provide a migration path for slave drivers to stop using .private

2012-07-20T05:58:20+00:00

This patch extends the sh dmaengine driver to support the preferred channel
selection and configuration method, instead of using the "private" field
from struct dma_chan. We add a standard filter function to be used by
slave drivers instead of implementing their own ones, and add support for
the DMA_SLAVE_CONFIG control operation, which must accompany the new
channel selection method. We still support the legacy .private channel
allocation method to cater for a smooth driver migration.

Signed-off-by: Guennadi Liakhovetski 
[applied a trvial checkpath fix]
Signed-off-by: Vinod Koul

dma: sh: use an integer slave ID to improve API compatibility

2012-07-20T05:53:45+00:00

Initially struct shdma_slave has been introduced with the only member - an
unsigned slave ID - to describe common properties of DMA slaves in an
extensible way. However, experience shows, that a slave ID is indeed the
only parameter, needed to identify DMA slaves. This is also, what is used
by the core dmaengine API in struct dma_slave_config. We switch to using
the slave_id directly, instead of passing a pointer to struct shdma_slave
to improve compatibility with the core. We also make the slave_id signed
for easier error checking.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Vinod Koul

dmaengine: shdma: prepare to stop using struct dma_chan::private

2012-07-20T05:53:44+00:00

Using struct dma_chan::private is deprecated. To update the shdma driver to
stop using it we first have to eliminate internal runtime uses of it. After
that we will also be able to stop using it for channel configuration.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Vinod Koul

dma: shdma: convert to the shdma base library

2012-07-13T03:43:08+00:00

The shdma base library has originally been extracted from the shdma driver,
which now can be converted to actually use it.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Vinod Koul

dma: shdma: prepare for conversion to the shdma base library

2012-07-13T03:43:07+00:00

By placing an anonymous union at the top of struct sh_dmae_slave we can
transparently prepare all device and client drivers for the upcoming
shdma-base conversion.

Signed-off-by: Guennadi Liakhovetski 
Signed-off-by: Vinod Koul

dma: sh_dma: not all SH DMAC implementations support MEMCPY

2012-02-01T16:53:53+00:00

Add a flag to allow platforms to specify, whether a DMAC instance supports
the MEMCPY operation. To avoid regressions, preserve the current default.

Signed-off-by: Guennadi Liakhovetski 
Acked-by: Paul Mundt 
Signed-off-by: Vinod Koul