patch-1.3.48 linux/include/asm-mips/jazzdma.h

• Lines: 97
• Date: Wed Dec 13 12:39:46 1995
• Orig file: v1.3.47/linux/include/asm-mips/jazzdma.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.47/linux/include/asm-mips/jazzdma.h linux/include/asm-mips/jazzdma.h
@@ -0,0 +1,96 @@
+/*
+ * Helpfile for jazzdma.c -- Mips Jazz R4030 DMA controller support
+ */
+
+#ifndef __ASM_JAZZDMA_H
+#define __ASM_JAZZDMA_H
+
+/*
+ * Prototypes and macros
+ */
+
+unsigned long vdma_init(unsigned long memory_start, unsigned long memory_end);
+unsigned long vdma_alloc(unsigned long paddr, unsigned long size);
+int vdma_free(unsigned long laddr);
+int vdma_remap(unsigned long laddr, unsigned long paddr, unsigned long size);
+unsigned long vdma_phys2log(unsigned long paddr);
+unsigned long vdma_log2phys(unsigned long laddr);
+void vdma_stats(void);		/* for debugging only */
+
+void vdma_enable(int channel);
+void vdma_disable(int channel);
+void vdma_set_mode(int channel, int mode);
+void vdma_set_addr(int channel, long addr);
+void vdma_set_count(int channel, int count);
+int vdma_get_residue(int channel);
+
+/*
+ * some definitions used by the driver functions
+ */
+#define VDMA_PAGESIZE		4096
+#define VDMA_PGTBL_ENTRIES	4096
+#define VDMA_PGTBL_SIZE		(sizeof(VDMA_PGTBL_ENTRY) * VDMA_PGTBL_ENTRIES)
+#define VDMA_PAGE_EMPTY		0
+
+/*
+ * Macros to get page no. and offset of a given address
+ * Note that VDMA_PAGE() works for physical addresses only
+ */
+#define VDMA_PAGE(a)            ((unsigned int)(a) >> 12)
+#define VDMA_OFFSET(a)          ((unsigned int)(a) & (VDMA_PAGESIZE-1))
+
+/*
+ * error code returned by vdma_alloc()
+ * (See also arch/mips/kernel/jazzdma.c)
+ */
+#define VDMA_ERROR              0xffffffff
+
+/*
+ * VDMA pagetable entry description
+ */
+typedef volatile struct VDMA_PGTBL_ENTRY
+{
+	unsigned int frame;		/* physical frame no. */
+	unsigned int owner;		/* owner of this entry (0=free) */
+} VDMA_PGTBL_ENTRY;
+
+
+/*
+ * DMA channel control registers
+ * in the R4030 MCT_ADR chip
+ */
+#define JAZZ_R4030_CHNL_MODE	0xE0000100	/* 8 DMA Channel Mode Registers, */
+						/* 0xE0000100,120,140... */
+#define JAZZ_R4030_CHNL_ENABLE  0xE0000108	/* 8 DMA Channel Enable Regs, */
+						/* 0xE0000108,128,148... */
+#define JAZZ_R4030_CHNL_COUNT   0xE0000110	/* 8 DMA Channel Byte Cnt Regs, */
+						/* 0xE0000110,130,150... */
+#define JAZZ_R4030_CHNL_ADDR	0xE0000118	/* 8 DMA Channel Address Regs, */
+						/* 0xE0000118,138,158... */
+
+/* channel enable register bits */
+
+#define R4030_CHNL_ENABLE        (1<<0)
+#define R4030_CHNL_WRITE         (1<<1)
+#define R4030_TC_INTR            (1<<8)
+#define R4030_MEM_INTR           (1<<9)
+#define R4030_ADDR_INTR          (1<<10)
+
+/* channel mode register bits */
+
+#define R4030_MODE_ATIME_40      (0) /* device access time on remote bus */
+#define R4030_MODE_ATIME_80      (1)
+#define R4030_MODE_ATIME_120     (2)
+#define R4030_MODE_ATIME_160     (3)
+#define R4030_MODE_ATIME_200     (4)
+#define R4030_MODE_ATIME_240     (5)
+#define R4030_MODE_ATIME_280     (6)
+#define R4030_MODE_ATIME_320     (7)
+#define R4030_MODE_WIDTH_8       (1<<3)	/* device data bus width */
+#define R4030_MODE_WIDTH_16      (2<<3)
+#define R4030_MODE_WIDTH_32      (3<<3)
+#define R4030_MODE_INTR_EN       (1<<5)
+#define R4030_MODE_BURST         (1<<6)	/* Rev. 2 only */
+#define R4030_MODE_FAST_ACK      (1<<7)	/* Rev. 2 only */
+
+#endif /* __ASM_JAZZDMA_H */