diff options
Diffstat (limited to 'drivers/dma/xilinx')
| -rw-r--r-- | drivers/dma/xilinx/xilinx_dma.c | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index ab0130639d80..eaa93fe93820 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -214,8 +214,8 @@ struct xilinx_vdma_desc_hw { * @next_desc_msb: MSB of Next Descriptor Pointer @0x04 * @buf_addr: Buffer address @0x08 * @buf_addr_msb: MSB of Buffer address @0x0C - * @pad1: Reserved @0x10 - * @pad2: Reserved @0x14 + * @mcdma_control: Control field for mcdma @0x10 + * @vsize_stride: Vsize and Stride field for mcdma @0x14 * @control: Control field @0x18 * @status: Status field @0x1C * @app: APP Fields @0x20 - 0x30 @@ -235,11 +235,11 @@ struct xilinx_axidma_desc_hw { /** * struct xilinx_cdma_desc_hw - Hardware Descriptor * @next_desc: Next Descriptor Pointer @0x00 - * @next_descmsb: Next Descriptor Pointer MSB @0x04 + * @next_desc_msb: Next Descriptor Pointer MSB @0x04 * @src_addr: Source address @0x08 - * @src_addrmsb: Source address MSB @0x0C + * @src_addr_msb: Source address MSB @0x0C * @dest_addr: Destination address @0x10 - * @dest_addrmsb: Destination address MSB @0x14 + * @dest_addr_msb: Destination address MSB @0x14 * @control: Control field @0x18 * @status: Status field @0x1C */ @@ -339,6 +339,7 @@ struct xilinx_dma_tx_descriptor { * @cyclic_seg_p: Physical allocated segments base for cyclic dma * @start_transfer: Differentiate b/w DMA IP's transfer * @stop_transfer: Differentiate b/w DMA IP's quiesce + * @tdest: TDEST value for mcdma */ struct xilinx_dma_chan { struct xilinx_dma_device *xdev; @@ -378,11 +379,11 @@ struct xilinx_dma_chan { }; /** - * enum xdma_ip_type: DMA IP type. + * enum xdma_ip_type - DMA IP type. * - * XDMA_TYPE_AXIDMA: Axi dma ip. - * XDMA_TYPE_CDMA: Axi cdma ip. - * XDMA_TYPE_VDMA: Axi vdma ip. + * @XDMA_TYPE_AXIDMA: Axi dma ip. + * @XDMA_TYPE_CDMA: Axi cdma ip. + * @XDMA_TYPE_VDMA: Axi vdma ip. * */ enum xdma_ip_type { @@ -994,6 +995,8 @@ static enum dma_status xilinx_dma_tx_status(struct dma_chan *dchan, /** * xilinx_dma_stop_transfer - Halt DMA channel * @chan: Driver specific DMA channel + * + * Return: '0' on success and failure value on error */ static int xilinx_dma_stop_transfer(struct xilinx_dma_chan *chan) { @@ -1010,6 +1013,8 @@ static int xilinx_dma_stop_transfer(struct xilinx_dma_chan *chan) /** * xilinx_cdma_stop_transfer - Wait for the current transfer to complete * @chan: Driver specific DMA channel + * + * Return: '0' on success and failure value on error */ static int xilinx_cdma_stop_transfer(struct xilinx_dma_chan *chan) { @@ -1825,11 +1830,14 @@ error: /** * xilinx_dma_prep_dma_cyclic - prepare descriptors for a DMA_SLAVE transaction - * @chan: DMA channel - * @sgl: scatterlist to transfer to/from - * @sg_len: number of entries in @scatterlist + * @dchan: DMA channel + * @buf_addr: Physical address of the buffer + * @buf_len: Total length of the cyclic buffers + * @period_len: length of individual cyclic buffer * @direction: DMA direction * @flags: transfer ack flags + * + * Return: Async transaction descriptor on success and NULL on failure */ static struct dma_async_tx_descriptor *xilinx_dma_prep_dma_cyclic( struct dma_chan *dchan, dma_addr_t buf_addr, size_t buf_len, @@ -2013,7 +2021,9 @@ error: /** * xilinx_dma_terminate_all - Halt the channel and free descriptors - * @chan: Driver specific DMA Channel pointer + * @dchan: Driver specific DMA Channel pointer + * + * Return: '0' always. */ static int xilinx_dma_terminate_all(struct dma_chan *dchan) { @@ -2328,6 +2338,7 @@ static void xdma_disable_allclks(struct xilinx_dma_device *xdev) * * @xdev: Driver specific device structure * @node: Device node + * @chan_id: DMA Channel id * * Return: '0' on success and failure value on error */ |