kernel.git/drivers/dma/at_hdmac.c, branch linux-3.6.y

dmaengine: at_hdmac: check that each sg data length is non-null

2012-09-14T02:56:40Z

Avoid the construction of a malformed DMA request sent to the DMA controller. Log message is for debug only because this condition is unlikely to append and may only trigger at driver development time. Signed-off-by: Nicolas Ferre Cc: Stable [2.6.31+] Signed-off-by: Vinod Koul

dmaengine: at_hdmac: fix comment in atc_prep_slave_sg()

2012-09-14T02:56:40Z

s/dma_memcpy/slave_sg/ and it is sg length that we are talking about. Signed-off-by: Nicolas Ferre Cc: Stable [2.6.31+] Signed-off-by: Vinod Koul

dmaengine: at_hdmac: add a few const qualifiers

2012-07-16T06:35:45Z

This prepares of_device_id.data becoming const. Without this change the following warning would occur: drivers/dma/at_hdmac.c: In function 'at_dma_get_driver_data': drivers/dma/at_hdmac.c:1228: warning: return discards qualifiers from pointer target type Signed-off-by: Uwe Kleine-König Cc: Nicolas Ferre Cc: Dan Williams Cc: Vinod Koul Acked-by: Nicolas Ferre Signed-off-by: Vinod Koul

dmaengine: at_hdmac: trivial: fix comment in header

2012-06-12T09:13:54Z

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

dmaengine: at_hdmac: take maxburst from slave configuration

2012-05-15T03:17:18Z

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: remove ATC_DEFAULT_CTRLA constant

2012-05-15T03:17:18Z

Not needed constant that was set to 0. Signed-off-by: Nicolas Ferre Signed-off-by: Vinod Koul

dmaengine: fix cyclic dma usage

2012-05-15T03:13:40Z

for cyclic dma, dont makr the descriptor as complte. Fix the remaining users of cyclic dma which do so Signed-off-by: Vinod Koul Tested-by: Nicolas Ferre Acked-by: Nicolas Ferre Tested-by: Mika Westerberg

dmaengine: at_hdmac: remove clear-on-read in atc_dostart()

2012-04-20T10:08:05Z

This loop on EBCISR register was designed to clear IRQ sources before enabling a DMA channel. This register is clear-on-read so a race condition can appear if another channel is already active and has just finished its transfer. Removing this read on EBCISR is fixing the issue as there is no case where an IRQ could be pending: we already make sure that this register is drained at probe() time and during resume. Signed-off-by: Nicolas Ferre Cc: stable Signed-off-by: Vinod Koul

dmaengine: at_hdmac: add slave config operation

2012-03-21T15:42:29Z

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: add context parameter to prep_slave_sg and prep_dma_cyclic

2012-03-21T13:50:23Z

Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic() interfaces to allow passing client/target specific information associated with the data transfer. Modify all affected DMA engine drivers. Signed-off-by: Alexandre Bounine Acked-by: Linus Walleij Acked-by: Felipe Balbi Signed-off-by: Vinod Koul