diff options
Diffstat (limited to 'include/asm-mn10300/dma.h')
-rw-r--r-- | include/asm-mn10300/dma.h | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/include/asm-mn10300/dma.h b/include/asm-mn10300/dma.h deleted file mode 100644 index 098df2e617ab..000000000000 --- a/include/asm-mn10300/dma.h +++ /dev/null | |||
@@ -1,118 +0,0 @@ | |||
1 | /* MN10300 ISA DMA handlers and definitions | ||
2 | * | ||
3 | * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd. | ||
4 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public Licence | ||
8 | * as published by the Free Software Foundation; either version | ||
9 | * 2 of the Licence, or (at your option) any later version. | ||
10 | */ | ||
11 | #ifndef _ASM_DMA_H | ||
12 | #define _ASM_DMA_H | ||
13 | |||
14 | #include <asm/system.h> | ||
15 | #include <linux/spinlock.h> | ||
16 | #include <asm/io.h> | ||
17 | #include <linux/delay.h> | ||
18 | |||
19 | #undef MAX_DMA_CHANNELS /* switch off linux/kernel/dma.c */ | ||
20 | #define MAX_DMA_ADDRESS 0xbfffffff | ||
21 | |||
22 | extern spinlock_t dma_spin_lock; | ||
23 | |||
24 | static inline unsigned long claim_dma_lock(void) | ||
25 | { | ||
26 | unsigned long flags; | ||
27 | spin_lock_irqsave(&dma_spin_lock, flags); | ||
28 | return flags; | ||
29 | } | ||
30 | |||
31 | static inline void release_dma_lock(unsigned long flags) | ||
32 | { | ||
33 | spin_unlock_irqrestore(&dma_spin_lock, flags); | ||
34 | } | ||
35 | |||
36 | /* enable/disable a specific DMA channel */ | ||
37 | static inline void enable_dma(unsigned int dmanr) | ||
38 | { | ||
39 | } | ||
40 | |||
41 | static inline void disable_dma(unsigned int dmanr) | ||
42 | { | ||
43 | } | ||
44 | |||
45 | /* Clear the 'DMA Pointer Flip Flop'. | ||
46 | * Write 0 for LSB/MSB, 1 for MSB/LSB access. | ||
47 | * Use this once to initialize the FF to a known state. | ||
48 | * After that, keep track of it. :-) | ||
49 | * --- In order to do that, the DMA routines below should --- | ||
50 | * --- only be used while holding the DMA lock ! --- | ||
51 | */ | ||
52 | static inline void clear_dma_ff(unsigned int dmanr) | ||
53 | { | ||
54 | } | ||
55 | |||
56 | /* set mode (above) for a specific DMA channel */ | ||
57 | static inline void set_dma_mode(unsigned int dmanr, char mode) | ||
58 | { | ||
59 | } | ||
60 | |||
61 | /* Set only the page register bits of the transfer address. | ||
62 | * This is used for successive transfers when we know the contents of | ||
63 | * the lower 16 bits of the DMA current address register, but a 64k boundary | ||
64 | * may have been crossed. | ||
65 | */ | ||
66 | static inline void set_dma_page(unsigned int dmanr, char pagenr) | ||
67 | { | ||
68 | } | ||
69 | |||
70 | |||
71 | /* Set transfer address & page bits for specific DMA channel. | ||
72 | * Assumes dma flipflop is clear. | ||
73 | */ | ||
74 | static inline void set_dma_addr(unsigned int dmanr, unsigned int a) | ||
75 | { | ||
76 | } | ||
77 | |||
78 | |||
79 | /* Set transfer size (max 64k for DMA1..3, 128k for DMA5..7) for | ||
80 | * a specific DMA channel. | ||
81 | * You must ensure the parameters are valid. | ||
82 | * NOTE: from a manual: "the number of transfers is one more | ||
83 | * than the initial word count"! This is taken into account. | ||
84 | * Assumes dma flip-flop is clear. | ||
85 | * NOTE 2: "count" represents _bytes_ and must be even for channels 5-7. | ||
86 | */ | ||
87 | static inline void set_dma_count(unsigned int dmanr, unsigned int count) | ||
88 | { | ||
89 | } | ||
90 | |||
91 | |||
92 | /* Get DMA residue count. After a DMA transfer, this | ||
93 | * should return zero. Reading this while a DMA transfer is | ||
94 | * still in progress will return unpredictable results. | ||
95 | * If called before the channel has been used, it may return 1. | ||
96 | * Otherwise, it returns the number of _bytes_ left to transfer. | ||
97 | * | ||
98 | * Assumes DMA flip-flop is clear. | ||
99 | */ | ||
100 | static inline int get_dma_residue(unsigned int dmanr) | ||
101 | { | ||
102 | return 0; | ||
103 | } | ||
104 | |||
105 | |||
106 | /* These are in kernel/dma.c: */ | ||
107 | extern int request_dma(unsigned int dmanr, const char *device_id); | ||
108 | extern void free_dma(unsigned int dmanr); | ||
109 | |||
110 | /* From PCI */ | ||
111 | |||
112 | #ifdef CONFIG_PCI | ||
113 | extern int isa_dma_bridge_buggy; | ||
114 | #else | ||
115 | #define isa_dma_bridge_buggy (0) | ||
116 | #endif | ||
117 | |||
118 | #endif /* _ASM_DMA_H */ | ||