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