diff options
| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2015-05-07 18:38:08 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2015-05-18 08:29:34 +0300 |
| commit | ee0fe35c8dcde29e7f65c34c286378750c075bf3 (patch) | |
| tree | 305667bc33318b5f44e1bb68057188d4d40be8de /drivers | |
| parent | 5ebe6afaf0057ac3eaeb98defd5456894b446d22 (diff) | |
| download | linux-ee0fe35c8dcde29e7f65c34c286378750c075bf3.tar.xz | |
dmaengine: xdmac: Handle descriptor's view 3 registers
The XDMAC DMA controller uses a concept of views to be able to handle
descriptors of different sizes.
So far, only the views 1 and 2 were handled by the driver. Unfortunately, we
need some of the configuration fields found in the view 3 in order to support
memset and interleaved transfers.
Add the definition for the view 3 registers, and the needed code to handle view
3 descriptors.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/at_xdmac.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index 933e4b338459..2d039512ecb3 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -236,6 +236,10 @@ struct at_xdmac_lld { dma_addr_t mbr_sa; /* Source Address Member */ dma_addr_t mbr_da; /* Destination Address Member */ u32 mbr_cfg; /* Configuration Register */ + u32 mbr_bc; /* Block Control Register */ + u32 mbr_ds; /* Data Stride Register */ + u32 mbr_sus; /* Source Microblock Stride Register */ + u32 mbr_dus; /* Destination Microblock Stride Register */ }; @@ -359,6 +363,8 @@ static void at_xdmac_start_xfer(struct at_xdmac_chan *atchan, if (at_xdmac_chan_is_cyclic(atchan)) { reg = AT_XDMAC_CNDC_NDVIEW_NDV1; at_xdmac_chan_write(atchan, AT_XDMAC_CC, first->lld.mbr_cfg); + } else if (first->lld.mbr_ubc & AT_XDMAC_MBR_UBC_NDV3) { + reg = AT_XDMAC_CNDC_NDVIEW_NDV3; } else { /* * No need to write AT_XDMAC_CC reg, it will be done when the |