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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-arm/mach/dma.h
Linux-2.6.12-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!
Diffstat (limited to 'include/asm-arm/mach/dma.h')
-rw-r--r--include/asm-arm/mach/dma.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/include/asm-arm/mach/dma.h b/include/asm-arm/mach/dma.h
new file mode 100644
index 00000000000..31bf716106e
--- /dev/null
+++ b/include/asm-arm/mach/dma.h
@@ -0,0 +1,55 @@
1/*
2 * linux/include/asm-arm/mach/dma.h
3 *
4 * Copyright (C) 1998-2000 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This header file describes the interface between the generic DMA handler
11 * (dma.c) and the architecture-specific DMA backends (dma-*.c)
12 */
13
14struct dma_struct;
15typedef struct dma_struct dma_t;
16
17struct dma_ops {
18 int (*request)(dmach_t, dma_t *); /* optional */
19 void (*free)(dmach_t, dma_t *); /* optional */
20 void (*enable)(dmach_t, dma_t *); /* mandatory */
21 void (*disable)(dmach_t, dma_t *); /* mandatory */
22 int (*residue)(dmach_t, dma_t *); /* optional */
23 int (*setspeed)(dmach_t, dma_t *, int); /* optional */
24 char *type;
25};
26
27struct dma_struct {
28 struct scatterlist buf; /* single DMA */
29 int sgcount; /* number of DMA SG */
30 struct scatterlist *sg; /* DMA Scatter-Gather List */
31
32 unsigned int active:1; /* Transfer active */
33 unsigned int invalid:1; /* Address/Count changed */
34 unsigned int using_sg:1; /* using scatter list? */
35 dmamode_t dma_mode; /* DMA mode */
36 int speed; /* DMA speed */
37
38 unsigned int lock; /* Device is allocated */
39 const char *device_id; /* Device name */
40
41 unsigned int dma_base; /* Controller base address */
42 int dma_irq; /* Controller IRQ */
43 struct scatterlist cur_sg; /* Current controller buffer */
44 unsigned int state;
45
46 struct dma_ops *d_ops;
47};
48
49/* Prototype: void arch_dma_init(dma)
50 * Purpose : Initialise architecture specific DMA
51 * Params : dma - pointer to array of DMA structures
52 */
53extern void arch_dma_init(dma_t *dma);
54
55extern void isa_init_dma(dma_t *dma);