mxs-dma.c provides two functions mxs_dma_is_apbh and mxs_dma_is_apbx
which are used at least in mxs-mmc.c. Building mxs-mmc as module
fails due to those two symbols not being exported.
Signed-off-by: NAttila Kinali <attila@kinali.ch>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

The shdma base library has originally been extracted from the shdma driver,
which now can be converted to actually use it.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Alan Cox <alan@linux.intel.com>
Acked-by: NPaul Mundt <lethal@linux-sh.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Chris Ball <cjb@laptop.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Now that all users have been updated to use the embedded in struct
sh_mmcif_plat_data DMA slave IDs, struct sh_mmcif_dma is no longer needed
and can be removed. This also makes preparation to the shdma base library
conversion easier.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Chris Ball <cjb@laptop.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

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: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

This patch extracts code from shdma.c, that does not directly deal with
hardware implementation details and can be re-used with diverse DMA
controller variants, found on SH-based SoCs.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

The shdma driver is going to be split into multiple files. To make this more
convenient move it to an own directory.
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Rename the compatible name and driver name to match with
tegra dts file and as per clock driver.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

In cyclic mode of DMA, the byte transferred can be more
than the requested size and in this case, calculating
residuals based on the current position of DMA transfer to
bytes requested i.e. bytes required to transfer to reach
bytes requested from current DMA position.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Tegra's APB DMA driver support the cyclic mode of data
transfer and hence setting the DMA_CYCLIC caps for dma
channels.

This is require when generic sound dmaengine pcm driver
request for dma channel with CYCLIC capability.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

The sound dmaengine pcm driver uses the dma in cyclic mode and
it does not ack the transfer descriptor  after transfer stops.
This may lead to hold that desc in chip's dma driver and does
not allow to reuse/free that descriptors. Hence not enabling
flag DMA_CTRL_ACK when dma runs in cyclic mode.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Use clk_prepare/clk_unprepare as required by the generic clk framework.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Use the sg_dma_address() to get the segment buffer address for
DMA transfer in place of sg_phys() which returns the physical
address of an sg entry.
The sg_dma_address() returns the correct buffer memory address
for DMA transfer.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

This piece of code is used often. Make it as a separate function.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

We usually have more than one DMA device. Thus, the probe function should serve
for all of them in case when the driver is built as a module.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

There were three places where such function is used. We still avoid to use
native fls() because in one case it requires to use 64bit version which is
suboptimal in our case.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Just to be sure we are in known state we disable the BLOCK interupts.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

The dw_dma_off call needs to have the all_chan_mask calculated. So, done this
calculations before the call. Moreover, remove duplicate code that masks the
DMA interrupts.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

In case the first descriptor we found is available, the counter still remains 0
value which is wrong. This patch fixes the counter behaviour.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

There is three places where values of the most significant registers were
printed. Make such piece of code as separate function.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

dma_addr_t is sometimes 32 bit and sometimes 64. We normally cast them to
unsigned long long for printk().
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NViresh Kumar <viresh.linux@gmail.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Add support for two-channel dma under dmaengine
support: mmp-adma and pxa910-squ
Signed-off-by: NZhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: NLeo Yan <leoy@marvell.com>
Signed-off-by: NQiao Zhou <zhouqiao@marvell.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

This patch adds a small inline wrapper for the devivce_tx_status callback of a
dma device. This makes the source code of users of this function a bit more
compact and a bit more legible.

E.g.:
-status = chan->device->device_tx_status(chan, cookie, &state)
+status = dmaengine_tx_status(chan, cookie, &state)
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Allocate memory, region, remap and irq for device state using
devm_* helpers to simplify memory accounting.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

pl330_update() stores a pointer to the thrd->req that finished, which
contains a pointer to the corresponding pl330_req.  This is done with
the pl330_lock held.  Then, it iterates through the req_done list,
calling the callback for each of the requests that are done.  The
problem is that the driver releases the lock before calling the
callback for each of the callbacks.  pl330_submit_req() running in
another processor can then acquire the lock and insert another request
in one of the thrd->req that hasn't been processed yet, replacing the
pointer to pl330_req there.  When the callback returns in
pl330_update() and the next rqdone is popped from the list, it
dereferences the pl330_req pointer to the just scheduled pl330_req,
instead of the one that has finished, calling pl330 with the wrong r.

This patch fixes this by storing the pointer to pl330_req directly in
the list.
Signed-off-by: NJavi Merino <javi.merino@arm.com>
Cc: Jassi Brar <jaswinder.singh@linaro.org>
Acked-by: NJassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Not all Atmel SoCs were pointed out in header comment which was bringing
confusion. Remove the truncated list of supported devices, replace by the
only one that is not supported.
Reported-by: NElen Song <elen.song@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Add dmaengine based NVIDIA's Tegra APB DMA driver.
This driver support the slave mode of data transfer from
peripheral to memory and vice versa.
The driver supports for the cyclic and non-cyclic mode
of data transfer.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

The DMA controller like Nvidia's Tegra Dma controller
supports the different slave requestor id from different slave.
This need to be configure in dma controller to handle the request
properly.

Adding the slave-id in the slave configuration so that information
can be passed from client when configuring for slave.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

enable the mxs-dma for imx6q.
Also remove the unused header file.
Signed-off-by: NHuang Shijie <shijie8@gmail.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Fixes the following sparse warning:
drivers/dma/pl330.c:2542:5: warning: symbol 'add_desc' was not declared. Should it be static?
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

This fix audio underrun issue. When SNDRV_PCM_TRIGGER_STOP
and SNDRV_PCM_TRIGGER_START, it calls prepare again. buf_tail
should be reset to zero.
So move buf_tail initialization into prepare function.
Signed-off-by: NRichard Zhao <richard.zhao@freescale.com>
Acked-by: NShawn Guo <shawn.guo@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>

Commit eab21585 ("dmaengine: pl330: dont complete descriptor for
cyclic dma") wrongly completes descriptor for cyclic dma, hence following
BUG_ON is still hit with cyclic DMA operations.

kernel BUG at drivers/dma/dmaengine.h:53!
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Acked-by: NJassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
Cc: stable <stable@vger.kernel.org>