2 * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
3 * Copyright (C) 2008-2010 Jonathan Cameron
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
15 #define AD799X_CHANNEL_SHIFT 4
16 #define AD799X_STORAGEBITS 16
18 * AD7991, AD7995 and AD7999 defines
21 #define AD7991_REF_SEL 0x08
22 #define AD7991_FLTR 0x04
23 #define AD7991_BIT_TRIAL_DELAY 0x02
24 #define AD7991_SAMPLE_DELAY 0x01
27 * AD7992, AD7993, AD7994, AD7997 and AD7998 defines
30 #define AD7998_FLTR 0x08
31 #define AD7998_ALERT_EN 0x04
32 #define AD7998_BUSY_ALERT 0x02
33 #define AD7998_BUSY_ALERT_POL 0x01
35 #define AD7998_CONV_RES_REG 0x0
36 #define AD7998_ALERT_STAT_REG 0x1
37 #define AD7998_CONF_REG 0x2
38 #define AD7998_CYCLE_TMR_REG 0x3
39 #define AD7998_DATALOW_CH1_REG 0x4
40 #define AD7998_DATAHIGH_CH1_REG 0x5
41 #define AD7998_HYST_CH1_REG 0x6
42 #define AD7998_DATALOW_CH2_REG 0x7
43 #define AD7998_DATAHIGH_CH2_REG 0x8
44 #define AD7998_HYST_CH2_REG 0x9
45 #define AD7998_DATALOW_CH3_REG 0xA
46 #define AD7998_DATAHIGH_CH3_REG 0xB
47 #define AD7998_HYST_CH3_REG 0xC
48 #define AD7998_DATALOW_CH4_REG 0xD
49 #define AD7998_DATAHIGH_CH4_REG 0xE
50 #define AD7998_HYST_CH4_REG 0xF
52 #define AD7998_CYC_MASK 0x7
53 #define AD7998_CYC_DIS 0x0
54 #define AD7998_CYC_TCONF_32 0x1
55 #define AD7998_CYC_TCONF_64 0x2
56 #define AD7998_CYC_TCONF_128 0x3
57 #define AD7998_CYC_TCONF_256 0x4
58 #define AD7998_CYC_TCONF_512 0x5
59 #define AD7998_CYC_TCONF_1024 0x6
60 #define AD7998_CYC_TCONF_2048 0x7
62 #define AD7998_ALERT_STAT_CLEAR 0xFF
65 * AD7997 and AD7997 defines
68 #define AD7997_8_READ_SINGLE 0x80
69 #define AD7997_8_READ_SEQUENCE 0x70
85 * struct ad799x_chip_info - chip specifc information
86 * @num_inputs: number of physical inputs on chip
87 * @bits: accuracy of the adc in bits
88 * @int_vref_mv: the internal reference voltage
89 * @monitor_mode: whether the chip supports monitor interrupts
90 * @default_config: device default configuration
91 * @dev_attrs: pointer to the device attribute group
92 * @scan_attrs: pointer to the scan element attribute group
93 * @event_attrs: pointer to the monitor event attribute group
94 * @ad799x_set_scan_mode: function pointer to the device specific mode function
97 struct ad799x_chip_info {
105 struct attribute_group *dev_attrs;
106 struct attribute_group *scan_attrs;
107 struct attribute_group *event_attrs;
108 int (*ad799x_set_scan_mode) (struct ad799x_state *st,
112 struct ad799x_state {
113 struct iio_dev *indio_dev;
114 struct i2c_client *client;
115 const struct ad799x_chip_info *chip_info;
116 struct work_struct poll_work;
117 struct work_struct work_thresh;
118 atomic_t protect_ring;
120 struct iio_trigger *trig;
121 struct regulator *reg;
130 * TODO: struct ad799x_platform_data needs to go into include/linux/iio
133 struct ad799x_platform_data {
137 int ad799x_set_scan_mode(struct ad799x_state *st, unsigned mask);
139 #ifdef CONFIG_AD799X_RING_BUFFER
140 int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask);
141 int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);
142 void ad799x_ring_cleanup(struct iio_dev *indio_dev);
143 #else /* CONFIG_AD799X_RING_BUFFER */
144 int ad799x_single_channel_from_ring(struct ad799x_state *st, long mask)
151 ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)
156 static inline void ad799x_ring_cleanup(struct iio_dev *indio_dev)
159 #endif /* CONFIG_AD799X_RING_BUFFER */
160 #endif /* _AD799X_H_ */