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92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* bfin_dma.h - Blackfin DMA defines/structures/etc...
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*
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* Copyright 2004-2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __ASM_BFIN_DMA_H__
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#define __ASM_BFIN_DMA_H__
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#include <linux/types.h>
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/* DMA_CONFIG Masks */
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#define DMAEN 0x0001 /* DMA Channel Enable */
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#define WNR 0x0002 /* Channel Direction (W/R*) */
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#define WDSIZE_8 0x0000 /* Transfer Word Size = 8 */
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#define WDSIZE_16 0x0004 /* Transfer Word Size = 16 */
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#define WDSIZE_32 0x0008 /* Transfer Word Size = 32 */
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#define DMA2D 0x0010 /* DMA Mode (2D/1D*) */
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#define RESTART 0x0020 /* DMA Buffer Clear */
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#define DI_SEL 0x0040 /* Data Interrupt Timing Select */
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#define DI_EN 0x0080 /* Data Interrupt Enable */
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#define NDSIZE_0 0x0000 /* Next Descriptor Size = 0 (Stop/Autobuffer) */
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#define NDSIZE_1 0x0100 /* Next Descriptor Size = 1 */
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#define NDSIZE_2 0x0200 /* Next Descriptor Size = 2 */
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#define NDSIZE_3 0x0300 /* Next Descriptor Size = 3 */
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#define NDSIZE_4 0x0400 /* Next Descriptor Size = 4 */
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#define NDSIZE_5 0x0500 /* Next Descriptor Size = 5 */
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#define NDSIZE_6 0x0600 /* Next Descriptor Size = 6 */
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#define NDSIZE_7 0x0700 /* Next Descriptor Size = 7 */
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#define NDSIZE_8 0x0800 /* Next Descriptor Size = 8 */
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#define NDSIZE_9 0x0900 /* Next Descriptor Size = 9 */
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#define NDSIZE 0x0f00 /* Next Descriptor Size */
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#define DMAFLOW 0x7000 /* Flow Control */
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#define DMAFLOW_STOP 0x0000 /* Stop Mode */
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#define DMAFLOW_AUTO 0x1000 /* Autobuffer Mode */
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#define DMAFLOW_ARRAY 0x4000 /* Descriptor Array Mode */
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#define DMAFLOW_SMALL 0x6000 /* Small Model Descriptor List Mode */
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#define DMAFLOW_LARGE 0x7000 /* Large Model Descriptor List Mode */
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/* DMA_IRQ_STATUS Masks */
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#define DMA_DONE 0x0001 /* DMA Completion Interrupt Status */
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#define DMA_ERR 0x0002 /* DMA Error Interrupt Status */
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#define DFETCH 0x0004 /* DMA Descriptor Fetch Indicator */
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#define DMA_RUN 0x0008 /* DMA Channel Running Indicator */
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/*
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* All Blackfin system MMRs are padded to 32bits even if the register
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* itself is only 16bits. So use a helper macro to streamline this.
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*/
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#define __BFP(m) u16 m; u16 __pad_##m
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/*
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* bfin dma registers layout
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*/
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struct bfin_dma_regs {
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u32 next_desc_ptr;
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u32 start_addr;
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__BFP(config);
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u32 __pad0;
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__BFP(x_count);
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__BFP(x_modify);
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__BFP(y_count);
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__BFP(y_modify);
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u32 curr_desc_ptr;
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u32 curr_addr;
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__BFP(irq_status);
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__BFP(peripheral_map);
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__BFP(curr_x_count);
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u32 __pad1;
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__BFP(curr_y_count);
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u32 __pad2;
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};
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/*
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* bfin handshake mdma registers layout
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*/
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struct bfin_hmdma_regs {
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__BFP(control);
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__BFP(ecinit);
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__BFP(bcinit);
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__BFP(ecurgent);
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__BFP(ecoverflow);
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__BFP(ecount);
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__BFP(bcount);
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};
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#undef __BFP
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#endif
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