62 lines
2 KiB
C
62 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SPRD_DMA_H_
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#define _SPRD_DMA_H_
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#define SPRD_DMA_REQ_SHIFT 16
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#define SPRD_DMA_FLAGS(req_mode, int_type) \
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((req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
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/*
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* enum sprd_dma_req_mode: define the DMA request mode
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* @SPRD_DMA_FRAG_REQ: fragment request mode
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* @SPRD_DMA_BLK_REQ: block request mode
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* @SPRD_DMA_TRANS_REQ: transaction request mode
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* @SPRD_DMA_LIST_REQ: link-list request mode
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*
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* We have 4 types request mode: fragment mode, block mode, transaction mode
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* and linklist mode. One transaction can contain several blocks, one block can
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* contain several fragments. Link-list mode means we can save several DMA
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* configuration into one reserved memory, then DMA can fetch each DMA
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* configuration automatically to start transfer.
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*/
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enum sprd_dma_req_mode {
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SPRD_DMA_FRAG_REQ,
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SPRD_DMA_BLK_REQ,
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SPRD_DMA_TRANS_REQ,
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SPRD_DMA_LIST_REQ,
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};
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/*
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* enum sprd_dma_int_type: define the DMA interrupt type
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* @SPRD_DMA_NO_INT: do not need generate DMA interrupts.
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* @SPRD_DMA_FRAG_INT: fragment done interrupt when one fragment request
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* is done.
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* @SPRD_DMA_BLK_INT: block done interrupt when one block request is done.
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* @SPRD_DMA_BLK_FRAG_INT: block and fragment interrupt when one fragment
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* or one block request is done.
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* @SPRD_DMA_TRANS_INT: tansaction done interrupt when one transaction
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* request is done.
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* @SPRD_DMA_TRANS_FRAG_INT: transaction and fragment interrupt when one
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* transaction request or fragment request is done.
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* @SPRD_DMA_TRANS_BLK_INT: transaction and block interrupt when one
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* transaction request or block request is done.
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* @SPRD_DMA_LIST_INT: link-list done interrupt when one link-list request
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* is done.
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* @SPRD_DMA_CFGERR_INT: configure error interrupt when configuration is
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* incorrect.
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*/
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enum sprd_dma_int_type {
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SPRD_DMA_NO_INT,
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SPRD_DMA_FRAG_INT,
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SPRD_DMA_BLK_INT,
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SPRD_DMA_BLK_FRAG_INT,
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SPRD_DMA_TRANS_INT,
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SPRD_DMA_TRANS_FRAG_INT,
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SPRD_DMA_TRANS_BLK_INT,
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SPRD_DMA_LIST_INT,
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SPRD_DMA_CFGERR_INT,
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};
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#endif
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