1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
* Copyright 2009 ST-Ericsson SA
* Copyright 2009 STMicroelectronics.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*/
#ifndef __INC_ASM_ARCH_DMA_H
#define __INC_ASM_ARCH_DMA_H
#define MAX_DMA_CHANNELS 32
#ifndef __ASSEMBLY__
#include <asm/scatterlist.h>
typedef unsigned int dmach_t;
typedef unsigned int dmamode_t;
enum dma_flow_controller {
DMA_IS_FLOW_CNTLR,
PERIPH_IS_FLOW_CNTLR
};
enum {
DMA_FALSE,
DMA_TRUE
};
enum dma_xfer_dir {
MEM_TO_MEM,
MEM_TO_PERIPH,
PERIPH_TO_MEM,
PERIPH_TO_PERIPH
};
enum dma_endianess {
DMA_LITTLE_ENDIAN,
DMA_BIG_ENDIAN
};
enum dma_event {
XFER_COMPLETE,
XFER_ERROR
};
typedef void (*dma_callback_t)(void *data, enum dma_event event);
#include <mach/dma_40-8500.h>
/**
* struct stm_dma_pipe_info - Structure to be filled by client drivers.
*
* @reserve_channel: Whether you want to reserve the channel
* @dir: MEM 2 MEM, PERIPH 2 MEM , MEM 2 PERIPH, PERIPH 2 PERIPH
* @flow_cntlr: who is flow controller (Device or DMA)
* @phys_chan_id: physical channel ID on which this channel will execute
* @data: data of callback handler
* @callback: callback handler registered by client
* @channel_type: std/ext, basic/log/operational, priority, security
* @src_dev_type: Src device type
* @dst_dev_type: Dest device type
* @src_addr: Source address
* @dst_addr: Dest address
* @src_info: Parameters for Source half channel
* @dst_info: Parameters for Dest half channel
*
*
* This structure has to be filled by the client drivers, before requesting
* a DMA pipe. This information is used by the Driver to allocate or
* reserve an appropriate DMA channel for this client.
*
*/
struct stm_dma_pipe_info {
unsigned int reserve_channel;
enum dma_xfer_dir dir;
enum dma_flow_controller flow_cntlr;
enum dma_chan_id phys_chan_id;
void *data;
dma_callback_t callback;
unsigned int channel_type;
enum dma_src_dev_type src_dev_type;
enum dma_dest_dev_type dst_dev_type;
void *src_addr;
void *dst_addr;
struct dma_half_channel_info src_info;
struct dma_half_channel_info dst_info;
};
extern int stm_configure_dma_channel(int channel,
struct stm_dma_pipe_info *info);
extern int stm_request_dma(int *channel, struct stm_dma_pipe_info *info);
extern void stm_free_dma(int channel);
extern int stm_set_callback_handler(int channel, void *callback_handler,
void *data);
extern int stm_enable_dma(int channel);
extern void stm_disable_dma(int channel);
extern int stm_pause_dma(int channel);
extern void stm_unpause_dma(int channel);
extern void stm_set_dma_addr(int channel, void *src_addr , void *dst_addr);
extern void stm_set_dma_count(int channel, int count);
extern void stm_set_dma_sg(int channel, struct scatterlist *sg,
int nr_sg, int type);
extern int stm_dma_residue(int channel);
#endif /*__ASSEMBLY__*/
#endif /* __INC_ASM_ARCH_DMA_H */
/* End of file - dma.h */
|
