patch-2.4.10 linux/include/asm-sh/dma.h

• Lines: 89
• Date: Sat Sep 8 12:29:09 2001
• Orig file: v2.4.9/linux/include/asm-sh/dma.h
• Orig date: Thu Aug 10 13:03:25 2000

diff -u --recursive --new-file v2.4.9/linux/include/asm-sh/dma.h linux/include/asm-sh/dma.h
@@ -5,6 +5,7 @@
 #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
@@ -13,8 +14,78 @@
 /* XXX: This is not applicable to SuperH, just needed for alloc_bootmem */
 #define MAX_DMA_ADDRESS      (PAGE_OFFSET+0x10000000)
 
-extern int request_dma(unsigned int dmanr, const char * device_id);	/* reserve a DMA channel */
-extern void free_dma(unsigned int dmanr);	/* release it again */
+#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;