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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
* Copyright (C) 2008-2010 Jonathan Cameron
*
* 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.
*
* ad799x.h
*/
#ifndef _AD799X_H_
#define _AD799X_H_
#define AD799X_CHANNEL_SHIFT 4
#define AD799X_STORAGEBITS 16
/*
* AD7991, AD7995 and AD7999 defines
*/
#define AD7991_REF_SEL 0x08
#define AD7991_FLTR 0x04
#define AD7991_BIT_TRIAL_DELAY 0x02
#define AD7991_SAMPLE_DELAY 0x01
/*
* AD7992, AD7993, AD7994, AD7997 and AD7998 defines
*/
#define AD7998_FLTR 0x08
#define AD7998_ALERT_EN 0x04
#define AD7998_BUSY_ALERT 0x02
#define AD7998_BUSY_ALERT_POL 0x01
#define AD7998_CONV_RES_REG 0x0
#define AD7998_ALERT_STAT_REG 0x1
#define AD7998_CONF_REG 0x2
#define AD7998_CYCLE_TMR_REG 0x3
#define AD7998_DATALOW_CH1_REG 0x4
#define AD7998_DATAHIGH_CH1_REG 0x5
#define AD7998_HYST_CH1_REG 0x6
#define AD7998_DATALOW_CH2_REG 0x7
#define AD7998_DATAHIGH_CH2_REG 0x8
#define AD7998_HYST_CH2_REG 0x9
#define AD7998_DATALOW_CH3_REG 0xA
#define AD7998_DATAHIGH_CH3_REG 0xB
#define AD7998_HYST_CH3_REG 0xC
#define AD7998_DATALOW_CH4_REG 0xD
#define AD7998_DATAHIGH_CH4_REG 0xE
#define AD7998_HYST_CH4_REG 0xF
#define AD7998_CYC_MASK 0x7
#define AD7998_CYC_DIS 0x0
#define AD7998_CYC_TCONF_32 0x1
#define AD7998_CYC_TCONF_64 0x2
#define AD7998_CYC_TCONF_128 0x3
#define AD7998_CYC_TCONF_256 0x4
#define AD7998_CYC_TCONF_512 0x5
#define AD7998_CYC_TCONF_1024 0x6
#define AD7998_CYC_TCONF_2048 0x7
#define AD7998_ALERT_STAT_CLEAR 0xFF
/*
* AD7997 and AD7997 defines
*/
#define AD7997_8_READ_SINGLE 0x80
#define AD7997_8_READ_SEQUENCE 0x70
enum {
ad7991,
ad7995,
ad7999,
ad7992,
ad7993,
ad7994,
ad7997,
ad7998
};
struct ad799x_state;
/**
* struct ad799x_chip_info - chip specifc information
* @num_inputs: number of physical inputs on chip
* @bits: accuracy of the adc in bits
* @int_vref_mv: the internal reference voltage
* @monitor_mode: whether the chip supports monitor interrupts
* @default_config: device default configuration
* @dev_attrs: pointer to the device attribute group
* @scan_attrs: pointer to the scan element attribute group
* @event_attrs: pointer to the monitor event attribute group
* @ad799x_set_scan_mode: function pointer to the device specific mode function
*/
struct ad799x_chip_info {
u8 num_inputs;
u8 bits;
u8 storagebits;
char sign;
u16 int_vref_mv;
bool monitor_mode;
u16 default_config;
struct attribute_group *dev_attrs;
struct attribute_group *scan_attrs;
struct attribute_group *event_attrs;
int (*ad799x_set_scan_mode) (struct ad799x_state *st,
unsigned mask);
};
struct ad799x_state {
struct iio_dev *indio_dev;
struct i2c_client *client;
const struct ad799x_chip_info *chip_info;
struct work_struct poll_work;
struct work_struct work_thresh;
atomic_t protect_ring;
struct iio_trigger *trig;
struct regulator *reg;
s64 last_timestamp;
u16 int_vref_mv;
unsigned id;
char *name;
u16 config;
};
/*
* TODO: struct ad799x_platform_data needs to go into include/linux/iio
*/
struct ad799x_platform_data {
u16 vref_mv;
};
int ad799x_set_scan_mode(struct ad799x_state *st, unsigned mask);
#ifdef CONFIG_AD799X_RING_BUFFER
int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask);
int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);
void ad799x_ring_cleanup(struct iio_dev *indio_dev);
#else /* CONFIG_AD799X_RING_BUFFER */
int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask)
{
return -EINVAL;
}
static inline int
ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)
{
return 0;
}
static inline void ad799x_ring_cleanup(struct iio_dev *indio_dev)
{
}
#endif /* CONFIG_AD799X_RING_BUFFER */
#endif /* _AD799X_H_ */
|
