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#ifndef _DS2_DMA_H__
#define _DS2_DMA_H__
#ifdef __cplusplus
extern "C" {
#endif
#define MAX_DMA_NUM 6 /* max 6 channels */
// DMA request source register
#define DMAC_DRSR_RS_BIT 0
#define DMAC_DRSR_RS_AUTO (8 << DMAC_DRSR_RS_BIT)
// DMA channel command register
#define DMAC_DCMD_SAI (1 << 23) /* source address increment */
#define DMAC_DCMD_DAI (1 << 22) /* dest address increment */
#define DMAC_DCMD_SWDH_BIT 14 /* source port width */
#define DMAC_DCMD_SWDH_32 (0 << DMAC_DCMD_SWDH_BIT)
#define DMAC_DCMD_SWDH_8 (1 << DMAC_DCMD_SWDH_BIT)
#define DMAC_DCMD_SWDH_16 (2 << DMAC_DCMD_SWDH_BIT)
#define DMAC_DCMD_DWDH_BIT 12 /* dest port width */
#define DMAC_DCMD_DWDH_32 (0 << DMAC_DCMD_DWDH_BIT)
#define DMAC_DCMD_DWDH_8 (1 << DMAC_DCMD_DWDH_BIT)
#define DMAC_DCMD_DWDH_16 (2 << DMAC_DCMD_DWDH_BIT)
#define DMAC_DCMD_DS_BIT 8 /* transfer data size of a data unit */
#define DMAC_DCMD_DS_32BIT (0 << DMAC_DCMD_DS_BIT)
#define DMAC_DCMD_DS_8BIT (1 << DMAC_DCMD_DS_BIT)
#define DMAC_DCMD_DS_16BIT (2 << DMAC_DCMD_DS_BIT)
#define DMAC_DCMD_DS_16BYTE (3 << DMAC_DCMD_DS_BIT)
#define DMAC_DCMD_DS_32BYTE (4 << DMAC_DCMD_DS_BIT)
#define DMAC_DCMD_TM (1 << 7) /* transfer mode: 0-single 1-block */
//detect if channel has completed job
#define DMAC_DCCSR_TT (1 << 3) /* transfer terminated */
#define DMAC_BASE 0xB3020000
#define REG32(addr) *((volatile u32 *)(addr))
#define DMAC_DCCSR(n) (DMAC_BASE + (0x10 + (n) * 0x20)) /* DMA control/status */
#define REG_DMAC_DCCSR(n) REG32(DMAC_DCCSR((n)))
#define ds2_DMA_isBusy(n) \
!( REG_DMAC_DCCSR((n)) & DMAC_DCCSR_TT )
/*
Copy modes
*/
#define DMA_MODE32BYTE DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_32BYTE | DMAC_DCMD_TM
#define DMA_MODE16BYTE DMAC_DCMD_SWDH_16 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BYTE | DMAC_DCMD_TM
#define DMA_MODE32BIT DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | \
DMAC_DCMD_DS_32BIT
#define DMA_MODE16BIT DMAC_DCMD_SWDH_16 | DMAC_DCMD_DWDH_16 | \
DMAC_DCMD_DS_16BIT
#define DMA_MODE8BIT DMAC_DCMD_SWDH_8 | DMAC_DCMD_DWDH_8 | \
DMAC_DCMD_DS_8BIT | DMAC_DCMD_TM
#define DMA_MODECOPY DMAC_DCMD_SAI
extern int _dmaCopy(int ch, void *dest, void *src, unsigned int size, unsigned int flags);
/*
* Copy 'size' bytes from src to dest, in blocks of 32 bytes.
* size is in bytes and must be a multiple of 32.
* Both src and dest must be aligned to 32 bytes.
* Returns 0 on failure, non-zero on success.
*/
#define ds2_DMAcopy_32Byte(ch, dest, src, size)\
_dmaCopy(ch, dest, src, size, DMA_MODECOPY | DMA_MODE32BYTE)
/*
* Copy 'size' bytes from src to dest, in blocks of 16 bytes.
* size is in bytes and must be a multiple of 16.
* Both src and dest must be aligned to 16 bytes.
* Returns 0 on failure, non-zero on success.
*/
#define ds2_DMAcopy_16Byte(ch, dest, src, size)\
_dmaCopy(ch, dest, src, size, DMA_MODECOPY | DMA_MODE16BYTE);
/*
* Copy 'size' bytes from src to dest, in blocks of 32 bits (4 bytes).
* size is in bytes and must be a multiple of 4.
* Both src and dest must be aligned to 32 bits (4 bytes).
* Returns 0 on failure, non-zero on success.
*/
#define ds2_DMAcopy_32Bit(ch, dest, src, size)\
_dmaCopy(ch, dest, src, size, DMA_MODECOPY | DMA_MODE32BIT);
/*
- * Copy 'size' bytes from src to dest, in blocks of 16 bits (2 bytes).
- * size is in bytes and must be a multiple of 2.
- * Both src and dest must be aligned to 16 bits (2 bytes).
- * Returns 0 on failure, non-zero on success.
- */
#define ds2_DMAcopy_16Bit(ch, dest, src, size)\
_dmaCopy(ch, dest, src, size, DMA_MODECOPY | DMA_MODE16BIT)
/*
- * Copy 'size' individual bytes (8 bits at a time) from src to dest.
- * Returns 0 on failure, non-zero on success.
- */
#define ds2_DMAcopy_8Bit(ch, dest, src, size)\
_dmaCopy(ch, dest, src, size, DMA_MODECOPY | DMA_MODE8BIT)
//Stop DMA transfer
extern void dma_stop(int ch);
#define ds2_DMA_stop(ch)\
dma_stop(ch)
//Wait DMA transfer over
extern int dma_wait_finish(int ch);
#define ds2_DMA_wait(ch)\
dma_wait_finish(ch)
#ifdef __cplusplus
}
#endif
#endif //__DMA_H__
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