linux/platform_data/dma-ep93xx.h

1 /* SPDX-License-Identifier: GPL-2.0 */
7 #include <linux/dma-mapping.h>
10  * M2P channels.
25 /* M2M channels */
30  * struct ep93xx_dma_data - configuration data for the EP93xx dmaengine
36  * function. Note that this is only needed for slave/cyclic channels.  For
37  * memcpy channels %NULL data should be passed.
46  * struct ep93xx_dma_chan_data - platform specific data for a DMA channel
58  * struct ep93xx_dma_platform_data - platform data for the dmaengine driver
59  * @channels: array of channels which are passed to the driver
60  * @num_channels: number of channels in the array
62  * This structure is passed to the DMA engine driver via platform data. For
63  * M2P channels, contract is that even channels are for TX and odd for RX.
64  * There is no requirement for the M2M channels.
67 	struct ep93xx_dma_chan_data	*channels;  member
73 	return !strcmp(dev_name(chan->device->dev), "ep93xx-dma-m2p");  in ep93xx_dma_chan_is_m2p()
77  * ep93xx_dma_chan_direction - returns direction the channel can be used
81  * channel supports given DMA direction. Only M2P channels have such
82  * limitation, for M2M channels the direction is configurable.
90 	/* even channels are for TX, odd for RX */  in ep93xx_dma_chan_direction()
91 	return (chan->chan_id % 2 == 0) ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;  in ep93xx_dma_chan_direction()