/* * dma.h - Blackfin DMA defines/structures/etc... * * Copyright 2004-2008 Analog Devices Inc. * Licensed under the GPL-2 or later. */ #ifndef _BLACKFIN_DMA_H_ #define _BLACKFIN_DMA_H_ #include #include #include #include #include #include #include /*------------------------- * config reg bits value *-------------------------*/ #define DATA_SIZE_8 0 #define DATA_SIZE_16 1 #define DATA_SIZE_32 2 #ifdef CONFIG_BF60x #define DATA_SIZE_64 3 #endif #define DMA_FLOW_STOP 0 #define DMA_FLOW_AUTO 1 #ifdef CONFIG_BF60x #define DMA_FLOW_LIST 4 #define DMA_FLOW_ARRAY 5 #define DMA_FLOW_LIST_DEMAND 6 #define DMA_FLOW_ARRAY_DEMAND 7 #else #define DMA_FLOW_ARRAY 4 #define DMA_FLOW_SMALL 6 #define DMA_FLOW_LARGE 7 #endif #define DIMENSION_LINEAR 0 #define DIMENSION_2D 1 #define DIR_READ 0 #define DIR_WRITE 1 #define INTR_DISABLE 0 #ifdef CONFIG_BF60x #define INTR_ON_PERI 1 #endif #define INTR_ON_BUF 2 #define INTR_ON_ROW 3 #define DMA_NOSYNC_KEEP_DMA_BUF 0 #define DMA_SYNC_RESTART 1 #ifdef DMA_MMR_SIZE_32 #define DMA_MMR_SIZE_TYPE long #define DMA_MMR_READ bfin_read32 #define DMA_MMR_WRITE bfin_write32 #else #define DMA_MMR_SIZE_TYPE short #define DMA_MMR_READ bfin_read16 #define DMA_MMR_WRITE bfin_write16 #endif struct dma_desc_array { unsigned long start_addr; unsigned DMA_MMR_SIZE_TYPE cfg; unsigned DMA_MMR_SIZE_TYPE x_count; DMA_MMR_SIZE_TYPE x_modify; } __attribute__((packed)); struct dmasg { void *next_desc_addr; unsigned long start_addr; unsigned DMA_MMR_SIZE_TYPE cfg; unsigned DMA_MMR_SIZE_TYPE x_count; DMA_MMR_SIZE_TYPE x_modify; unsigned DMA_MMR_SIZE_TYPE y_count; DMA_MMR_SIZE_TYPE y_modify; } __attribute__((packed)); struct dma_register { void *next_desc_ptr; /* DMA Next Descriptor Pointer register */ unsigned long start_addr; /* DMA Start address register */ #ifdef CONFIG_BF60x unsigned long cfg; /* DMA Configuration register */ unsigned long x_count; /* DMA x_count register */ long x_modify; /* DMA x_modify register */ unsigned long y_count; /* DMA y_count register */ long y_modify; /* DMA y_modify register */ unsigned long reserved; unsigned long reserved2; void *curr_desc_ptr; /* DMA Current Descriptor Pointer register */ void *prev_desc_ptr; /* DMA previous initial Descriptor Pointer register */ unsigned long curr_addr_ptr; /* DMA Current Address Pointer register */ unsigned long irq_status; /* DMA irq status register */ unsigned long curr_x_count; /* DMA Current x-count register */ unsigned long curr_y_count; /* DMA Current y-count register */ unsigned long reserved3; unsigned long bw_limit_count; /* DMA band width limit count register */ unsigned long curr_bw_limit_count; /* DMA Current band width limit count register */ unsigned long bw_monitor_count; /* DMA band width limit count register */ unsigned long curr_bw_monitor_count; /* DMA Current band width limit count register */ #else unsigned short cfg; /* DMA Configuration register */