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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/arch-pxa/dma.h
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!
Diffstat (limited to 'include/asm-arm/arch-pxa/dma.h')
-rw-r--r--include/asm-arm/arch-pxa/dma.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/include/asm-arm/arch-pxa/dma.h b/include/asm-arm/arch-pxa/dma.h
new file mode 100644
index 000000000000..56db3d49bfc8
--- /dev/null
+++ b/include/asm-arm/arch-pxa/dma.h
@@ -0,0 +1,67 @@
1/*
2 * linux/include/asm-arm/arch-pxa/dma.h
3 *
4 * Author: Nicolas Pitre
5 * Created: Jun 15, 2001
6 * Copyright: MontaVista Software, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#ifndef __ASM_ARCH_DMA_H
13#define __ASM_ARCH_DMA_H
14
15#define MAX_DMA_ADDRESS 0xffffffff
16
17/* No DMA as the rest of the world see it */
18#define MAX_DMA_CHANNELS 0
19
20/*
21 * Descriptor structure for PXA's DMA engine
22 * Note: this structure must always be aligned to a 16-byte boundary.
23 */
24
25typedef struct pxa_dma_desc {
26 volatile u32 ddadr; /* Points to the next descriptor + flags */
27 volatile u32 dsadr; /* DSADR value for the current transfer */
28 volatile u32 dtadr; /* DTADR value for the current transfer */
29 volatile u32 dcmd; /* DCMD value for the current transfer */
30} pxa_dma_desc;
31
32#if defined(CONFIG_PXA27x)
33
34#define PXA_DMA_CHANNELS 32
35#define PXA_DMA_NBCH(prio) ((prio == DMA_PRIO_LOW) ? 16 : 8)
36
37typedef enum {
38 DMA_PRIO_HIGH = 0,
39 DMA_PRIO_MEDIUM = 8,
40 DMA_PRIO_LOW = 16
41} pxa_dma_prio;
42
43#elif defined(CONFIG_PXA25x)
44
45#define PXA_DMA_CHANNELS 16
46#define PXA_DMA_NBCH(prio) ((prio == DMA_PRIO_LOW) ? 8 : 4)
47
48typedef enum {
49 DMA_PRIO_HIGH = 0,
50 DMA_PRIO_MEDIUM = 4,
51 DMA_PRIO_LOW = 8
52} pxa_dma_prio;
53
54#endif
55
56/*
57 * DMA registration
58 */
59
60int pxa_request_dma (char *name,
61 pxa_dma_prio prio,
62 void (*irq_handler)(int, void *, struct pt_regs *),
63 void *data);
64
65void pxa_free_dma (int dma_ch);
66
67#endif /* _ASM_ARCH_DMA_H */