Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 96 insertions, 0 deletions

diff --git a/include/asm-mips/jazzdma.h b/include/asm-mips/jazzdma.h
new file mode 100644
index 000000000000..0a205b77e505
--- /dev/null
+++ b/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
+ */
+extern void vdma_init(void);
+extern unsigned long vdma_alloc(unsigned long paddr, unsigned long size);
+extern int vdma_free(unsigned long laddr);
+extern int vdma_remap(unsigned long laddr, unsigned long paddr,
+                      unsigned long size);
+extern unsigned long vdma_phys2log(unsigned long paddr);
+extern unsigned long vdma_log2phys(unsigned long laddr);
+extern void vdma_stats(void);           /* for debugging only */
+
+extern void vdma_enable(int channel);
+extern void vdma_disable(int channel);
+extern void vdma_set_mode(int channel, int mode);
+extern void vdma_set_addr(int channel, long addr);
+extern void vdma_set_count(int channel, int count);
+extern int vdma_get_residue(int channel);
+extern int vdma_get_enable(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         0xff000000
+
+/*
+ * 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 */