diff options
Diffstat (limited to 'arch/blackfin/include/asm/bfin_dma.h')
| -rw-r--r-- | arch/blackfin/include/asm/bfin_dma.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/bfin_dma.h b/arch/blackfin/include/asm/bfin_dma.h new file mode 100644 index 00000000000..d5112074414 --- /dev/null +++ b/arch/blackfin/include/asm/bfin_dma.h @@ -0,0 +1,91 @@ +/* + * 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 |