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-rw-r--r--include/asm-arm/dma.h143
1 files changed, 0 insertions, 143 deletions
diff --git a/include/asm-arm/dma.h b/include/asm-arm/dma.h
deleted file mode 100644
index 9f2c5305c260..000000000000
--- a/include/asm-arm/dma.h
+++ /dev/null
@@ -1,143 +0,0 @@
1#ifndef __ASM_ARM_DMA_H
2#define __ASM_ARM_DMA_H
3
4typedef unsigned int dmach_t;
5
6#include <linux/spinlock.h>
7#include <asm/system.h>
8#include <asm/scatterlist.h>
9#include <asm/arch/dma.h>
10
11/*
12 * This is the maximum virtual address which can be DMA'd from.
13 */
14#ifndef MAX_DMA_ADDRESS
15#define MAX_DMA_ADDRESS 0xffffffff
16#endif
17
18/*
19 * DMA modes
20 */
21typedef unsigned int dmamode_t;
22
23#define DMA_MODE_MASK 3
24
25#define DMA_MODE_READ 0
26#define DMA_MODE_WRITE 1
27#define DMA_MODE_CASCADE 2
28#define DMA_AUTOINIT 4
29
30extern spinlock_t dma_spin_lock;
31
32static inline unsigned long claim_dma_lock(void)
33{
34 unsigned long flags;
35 spin_lock_irqsave(&dma_spin_lock, flags);
36 return flags;
37}
38
39static inline void release_dma_lock(unsigned long flags)
40{
41 spin_unlock_irqrestore(&dma_spin_lock, flags);
42}
43
44/* Clear the 'DMA Pointer Flip Flop'.
45 * Write 0 for LSB/MSB, 1 for MSB/LSB access.
46 */
47#define clear_dma_ff(channel)
48
49/* Set only the page register bits of the transfer address.
50 *
51 * NOTE: This is an architecture specific function, and should
52 * be hidden from the drivers
53 */
54extern void set_dma_page(dmach_t channel, char pagenr);
55
56/* Request a DMA channel
57 *
58 * Some architectures may need to do allocate an interrupt
59 */
60extern int request_dma(dmach_t channel, const char * device_id);
61
62/* Free a DMA channel
63 *
64 * Some architectures may need to do free an interrupt
65 */
66extern void free_dma(dmach_t channel);
67
68/* Enable DMA for this channel
69 *
70 * On some architectures, this may have other side effects like
71 * enabling an interrupt and setting the DMA registers.
72 */
73extern void enable_dma(dmach_t channel);
74
75/* Disable DMA for this channel
76 *
77 * On some architectures, this may have other side effects like
78 * disabling an interrupt or whatever.
79 */
80extern void disable_dma(dmach_t channel);
81
82/* Test whether the specified channel has an active DMA transfer
83 */
84extern int dma_channel_active(dmach_t channel);
85
86/* Set the DMA scatter gather list for this channel
87 *
88 * This should not be called if a DMA channel is enabled,
89 * especially since some DMA architectures don't update the
90 * DMA address immediately, but defer it to the enable_dma().
91 */
92extern void set_dma_sg(dmach_t channel, struct scatterlist *sg, int nr_sg);
93
94/* Set the DMA address for this channel
95 *
96 * This should not be called if a DMA channel is enabled,
97 * especially since some DMA architectures don't update the
98 * DMA address immediately, but defer it to the enable_dma().
99 */
100extern void __set_dma_addr(dmach_t channel, void *addr);
101#define set_dma_addr(channel, addr) \
102 __set_dma_addr(channel, bus_to_virt(addr))
103
104/* Set the DMA byte count for this channel
105 *
106 * This should not be called if a DMA channel is enabled,
107 * especially since some DMA architectures don't update the
108 * DMA count immediately, but defer it to the enable_dma().
109 */
110extern void set_dma_count(dmach_t channel, unsigned long count);
111
112/* Set the transfer direction for this channel
113 *
114 * This should not be called if a DMA channel is enabled,
115 * especially since some DMA architectures don't update the
116 * DMA transfer direction immediately, but defer it to the
117 * enable_dma().
118 */
119extern void set_dma_mode(dmach_t channel, dmamode_t mode);
120
121/* Set the transfer speed for this channel
122 */
123extern void set_dma_speed(dmach_t channel, int cycle_ns);
124
125/* Get DMA residue count. After a DMA transfer, this
126 * should return zero. Reading this while a DMA transfer is
127 * still in progress will return unpredictable results.
128 * If called before the channel has been used, it may return 1.
129 * Otherwise, it returns the number of _bytes_ left to transfer.
130 */
131extern int get_dma_residue(dmach_t channel);
132
133#ifndef NO_DMA
134#define NO_DMA 255
135#endif
136
137#ifdef CONFIG_PCI
138extern int isa_dma_bridge_buggy;
139#else
140#define isa_dma_bridge_buggy (0)
141#endif
142
143#endif /* _ARM_DMA_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-14 23:49:33 -0500