| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | |
| 3 | #ifndef _SPRD_DMA_H_ |
| 4 | #define _SPRD_DMA_H_ |
| 5 | |
| 6 | #define SPRD_DMA_REQ_SHIFT 16 |
| 7 | #define SPRD_DMA_FLAGS(req_mode, int_type) \ |
| 8 | ((req_mode) << SPRD_DMA_REQ_SHIFT | (int_type)) |
| 9 | |
| 10 | /* |
| 11 | * enum sprd_dma_req_mode: define the DMA request mode |
| 12 | * @SPRD_DMA_FRAG_REQ: fragment request mode |
| 13 | * @SPRD_DMA_BLK_REQ: block request mode |
| 14 | * @SPRD_DMA_TRANS_REQ: transaction request mode |
| 15 | * @SPRD_DMA_LIST_REQ: link-list request mode |
| 16 | * |
| 17 | * We have 4 types request mode: fragment mode, block mode, transaction mode |
| 18 | * and linklist mode. One transaction can contain several blocks, one block can |
| 19 | * contain several fragments. Link-list mode means we can save several DMA |
| 20 | * configuration into one reserved memory, then DMA can fetch each DMA |
| 21 | * configuration automatically to start transfer. |
| 22 | */ |
| 23 | enum sprd_dma_req_mode { |
| 24 | SPRD_DMA_FRAG_REQ, |
| 25 | SPRD_DMA_BLK_REQ, |
| 26 | SPRD_DMA_TRANS_REQ, |
| 27 | SPRD_DMA_LIST_REQ, |
| 28 | }; |
| 29 | |
| 30 | /* |
| 31 | * enum sprd_dma_int_type: define the DMA interrupt type |
| 32 | * @SPRD_DMA_NO_INT: do not need generate DMA interrupts. |
| 33 | * @SPRD_DMA_FRAG_INT: fragment done interrupt when one fragment request |
| 34 | * is done. |
| 35 | * @SPRD_DMA_BLK_INT: block done interrupt when one block request is done. |
| 36 | * @SPRD_DMA_BLK_FRAG_INT: block and fragment interrupt when one fragment |
| 37 | * or one block request is done. |
| 38 | * @SPRD_DMA_TRANS_INT: tansaction done interrupt when one transaction |
| 39 | * request is done. |
| 40 | * @SPRD_DMA_TRANS_FRAG_INT: transaction and fragment interrupt when one |
| 41 | * transaction request or fragment request is done. |
| 42 | * @SPRD_DMA_TRANS_BLK_INT: transaction and block interrupt when one |
| 43 | * transaction request or block request is done. |
| 44 | * @SPRD_DMA_LIST_INT: link-list done interrupt when one link-list request |
| 45 | * is done. |
| 46 | * @SPRD_DMA_CFGERR_INT: configure error interrupt when configuration is |
| 47 | * incorrect. |
| 48 | */ |
| 49 | enum sprd_dma_int_type { |
| 50 | SPRD_DMA_NO_INT, |
| 51 | SPRD_DMA_FRAG_INT, |
| 52 | SPRD_DMA_BLK_INT, |
| 53 | SPRD_DMA_BLK_FRAG_INT, |
| 54 | SPRD_DMA_TRANS_INT, |
| 55 | SPRD_DMA_TRANS_FRAG_INT, |
| 56 | SPRD_DMA_TRANS_BLK_INT, |
| 57 | SPRD_DMA_LIST_INT, |
| 58 | SPRD_DMA_CFGERR_INT, |
| 59 | }; |
| 60 | |
| 61 | #endif |