This source file includes following definitions.
- comedi_isadma_program
- comedi_isadma_disable
- comedi_isadma_disable_on_sample
- comedi_isadma_poll
- comedi_isadma_set_mode
- comedi_isadma_alloc
- comedi_isadma_free
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7 #ifndef _COMEDI_ISADMA_H
8 #define _COMEDI_ISADMA_H
9
10 #include <linux/types.h>
11
12 struct comedi_device;
13 struct device;
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18
19 #define COMEDI_ISADMA_READ 0
20 #define COMEDI_ISADMA_WRITE 1
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30
31 struct comedi_isadma_desc {
32 void *virt_addr;
33 dma_addr_t hw_addr;
34 unsigned int chan;
35 unsigned int maxsize;
36 unsigned int size;
37 char mode;
38 };
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48
49 struct comedi_isadma {
50 struct device *dev;
51 struct comedi_isadma_desc *desc;
52 int n_desc;
53 int cur_dma;
54 unsigned int chan;
55 unsigned int chan2;
56 };
57
58 #if IS_ENABLED(CONFIG_ISA_DMA_API)
59
60 void comedi_isadma_program(struct comedi_isadma_desc *desc);
61 unsigned int comedi_isadma_disable(unsigned int dma_chan);
62 unsigned int comedi_isadma_disable_on_sample(unsigned int dma_chan,
63 unsigned int size);
64 unsigned int comedi_isadma_poll(struct comedi_isadma *dma);
65 void comedi_isadma_set_mode(struct comedi_isadma_desc *desc, char dma_dir);
66
67 struct comedi_isadma *comedi_isadma_alloc(struct comedi_device *dev,
68 int n_desc, unsigned int dma_chan1,
69 unsigned int dma_chan2,
70 unsigned int maxsize, char dma_dir);
71 void comedi_isadma_free(struct comedi_isadma *dma);
72
73 #else
74
75 static inline void comedi_isadma_program(struct comedi_isadma_desc *desc)
76 {
77 }
78
79 static inline unsigned int comedi_isadma_disable(unsigned int dma_chan)
80 {
81 return 0;
82 }
83
84 static inline unsigned int
85 comedi_isadma_disable_on_sample(unsigned int dma_chan, unsigned int size)
86 {
87 return 0;
88 }
89
90 static inline unsigned int comedi_isadma_poll(struct comedi_isadma *dma)
91 {
92 return 0;
93 }
94
95 static inline void comedi_isadma_set_mode(struct comedi_isadma_desc *desc,
96 char dma_dir)
97 {
98 }
99
100 static inline struct comedi_isadma *
101 comedi_isadma_alloc(struct comedi_device *dev, int n_desc,
102 unsigned int dma_chan1, unsigned int dma_chan2,
103 unsigned int maxsize, char dma_dir)
104 {
105 return NULL;
106 }
107
108 static inline void comedi_isadma_free(struct comedi_isadma *dma)
109 {
110 }
111
112 #endif
113
114 #endif