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 */ | ||
