dma.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- #ifndef __ASM_SH_DMA_H
- #define __ASM_SH_DMA_H
- #include <linux/config.h>
- #include <asm/io.h> /* need byte IO */
- #define MAX_DMA_CHANNELS 8
- #define SH_MAX_DMA_CHANNELS 4
- /* The maximum address that we can perform a DMA transfer to on this platform */
- /* Don't define MAX_DMA_ADDRESS; it's useless on the SuperH and any
- occurrence should be flagged as an error. */
- /* But... */
- /* XXX: This is not applicable to SuperH, just needed for alloc_bootmem */
- #define MAX_DMA_ADDRESS (PAGE_OFFSET+0x10000000)
- #if defined(__sh3__)
- #define SAR ((unsigned long[]){0xa4000020,0xa4000030,0xa4000040,0xa4000050})
- #define DAR ((unsigned long[]){0xa4000024,0xa4000034,0xa4000044,0xa4000054})
- #define DMATCR ((unsigned long[]){0xa4000028,0xa4000038,0xa4000048,0xa4000058})
- #define CHCR ((unsigned long[]){0xa400002c,0xa400003c,0xa400004c,0xa400005c})
- #define DMAOR 0xa4000060UL
- #elif defined(__SH4__)
- #define SAR ((unsigned long[]){0xbfa00000,0xbfa00010,0xbfa00020,0xbfa00030})
- #define DAR ((unsigned long[]){0xbfa00004,0xbfa00014,0xbfa00024,0xbfa00034})
- #define DMATCR ((unsigned long[]){0xbfa00008,0xbfa00018,0xbfa00028,0xbfa00038})
- #define CHCR ((unsigned long[]){0xbfa0000c,0xbfa0001c,0xbfa0002c,0xbfa0003c})
- #define DMAOR 0xbfa00040UL
- #endif
- #define DMTE_IRQ ((int[]){DMTE0_IRQ,DMTE1_IRQ,DMTE2_IRQ,DMTE3_IRQ})
- #define DMA_MODE_READ 0x00 /* I/O to memory, no autoinit, increment, single mode */
- #define DMA_MODE_WRITE 0x01 /* memory to I/O, no autoinit, increment, single mode */
- #define DMA_AUTOINIT 0x10
- #define REQ_L 0x00000000
- #define REQ_E 0x00080000
- #define RACK_H 0x00000000
- #define RACK_L 0x00040000
- #define ACK_R 0x00000000
- #define ACK_W 0x00020000
- #define ACK_H 0x00000000
- #define ACK_L 0x00010000
- #define DM_INC 0x00004000
- #define DM_DEC 0x00008000
- #define SM_INC 0x00001000
- #define SM_DEC 0x00002000
- #define RS_DUAL 0x00000000
- #define RS_IN 0x00000200
- #define RS_OUT 0x00000300
- #define TM_BURST 0x0000080
- #define TS_8 0x00000010
- #define TS_16 0x00000020
- #define TS_32 0x00000030
- #define TS_64 0x00000000
- #define TS_BLK 0x00000040
- #define CHCR_DE 0x00000001
- #define CHCR_TE 0x00000002
- #define CHCR_IE 0x00000004
- #define DMAOR_COD 0x00000008
- #define DMAOR_AE 0x00000004
- #define DMAOR_NMIF 0x00000002
- #define DMAOR_DME 0x00000001
- struct dma_info_t {
- unsigned int chan;
- unsigned int mode_read;
- unsigned int mode_write;
- unsigned long dev_addr;
- unsigned int mode;
- unsigned long mem_addr;
- unsigned int count;
- };
- static __inline__ void clear_dma_ff(unsigned int dmanr){}
- /* These are in arch/sh/kernel/dma.c: */
- extern unsigned long claim_dma_lock(void);
- extern void release_dma_lock(unsigned long flags);
- extern void setup_dma(unsigned int dmanr, struct dma_info_t *info);
- extern void enable_dma(unsigned int dmanr);
- extern void disable_dma(unsigned int dmanr);
- extern void set_dma_mode(unsigned int dmanr, char mode);
- extern void set_dma_addr(unsigned int dmanr, unsigned int a);
- extern void set_dma_count(unsigned int dmanr, unsigned int count);
- extern int get_dma_residue(unsigned int dmanr);
- #ifdef CONFIG_PCI
- extern int isa_dma_bridge_buggy;
- #else
- #define isa_dma_bridge_buggy (0)
- #endif
- #endif /* __ASM_SH_DMA_H */