| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _MXS_DMA_H_ |
| #define _MXS_DMA_H_ |
| |
| #include <linux/dmaengine.h> |
| |
| #define MXS_DMA_CTRL_WAIT4END BIT(31) |
| #define MXS_DMA_CTRL_WAIT4RDY BIT(30) |
| |
| /* |
| * The mxs dmaengine can do PIO transfers. We pass a pointer to the PIO words |
| * in the second argument to dmaengine_prep_slave_sg when the direction is |
| * set to DMA_TRANS_NONE. To make this clear and to prevent users from doing |
| * the error prone casting we have this wrapper function |
| */ |
| static inline struct dma_async_tx_descriptor *mxs_dmaengine_prep_pio( |
| struct dma_chan *chan, u32 *pio, unsigned int npio, |
| enum dma_transfer_direction dir, unsigned long flags) |
| { |
| return dmaengine_prep_slave_sg(chan, (struct scatterlist *)pio, npio, |
| dir, flags); |
| } |
| |
| #endif /* _MXS_DMA_H_ */ |
