summaryrefslogtreecommitdiff
path: root/drivers/iio/dac/ad5686.h
blob: 760f852911df76b70a2000e53e1231f7a533ee71 (plain)
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
160
161
162
163
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * This file is part of AD5686 DAC driver
 *
 * Copyright 2018 Analog Devices Inc.
 */

#ifndef __DRIVERS_IIO_DAC_AD5686_H__
#define __DRIVERS_IIO_DAC_AD5686_H__

#include <linux/types.h>
#include <linux/cache.h>
#include <linux/mutex.h>
#include <linux/kernel.h>

#include <linux/iio/iio.h>

#define AD5310_CMD(x)				((x) << 12)

#define AD5683_DATA(x)				((x) << 4)

#define AD5686_ADDR(x)				((x) << 16)
#define AD5686_CMD(x)				((x) << 20)

#define AD5686_ADDR_DAC(chan)			(0x1 << (chan))
#define AD5686_ADDR_ALL_DAC			0xF

#define AD5686_CMD_NOOP				0x0
#define AD5686_CMD_WRITE_INPUT_N		0x1
#define AD5686_CMD_UPDATE_DAC_N			0x2
#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N	0x3
#define AD5686_CMD_POWERDOWN_DAC		0x4
#define AD5686_CMD_LDAC_MASK			0x5
#define AD5686_CMD_RESET			0x6
#define AD5686_CMD_INTERNAL_REFER_SETUP		0x7
#define AD5686_CMD_DAISY_CHAIN_ENABLE		0x8
#define AD5686_CMD_READBACK_ENABLE		0x9

#define AD5686_LDAC_PWRDN_NONE			0x0
#define AD5686_LDAC_PWRDN_1K			0x1
#define AD5686_LDAC_PWRDN_100K			0x2
#define AD5686_LDAC_PWRDN_3STATE		0x3

#define AD5686_CMD_CONTROL_REG			0x4
#define AD5686_CMD_READBACK_ENABLE_V2		0x5

#define AD5310_REF_BIT_MSK			BIT(8)
#define AD5683_REF_BIT_MSK			BIT(12)
#define AD5693_REF_BIT_MSK			BIT(12)

/**
 * ad5686_supported_device_ids:
 */
enum ad5686_supported_device_ids {
	ID_AD5310R,
	ID_AD5311R,
	ID_AD5337R,
	ID_AD5338R,
	ID_AD5671R,
	ID_AD5672R,
	ID_AD5673R,
	ID_AD5674R,
	ID_AD5675R,
	ID_AD5676,
	ID_AD5676R,
	ID_AD5677R,
	ID_AD5679R,
	ID_AD5681R,
	ID_AD5682R,
	ID_AD5683,
	ID_AD5683R,
	ID_AD5684,
	ID_AD5684R,
	ID_AD5685R,
	ID_AD5686,
	ID_AD5686R,
	ID_AD5691R,
	ID_AD5692R,
	ID_AD5693,
	ID_AD5693R,
	ID_AD5694,
	ID_AD5694R,
	ID_AD5695R,
	ID_AD5696,
	ID_AD5696R,
};

enum ad5686_regmap_type {
	AD5310_REGMAP,
	AD5683_REGMAP,
	AD5686_REGMAP,
	AD5693_REGMAP
};

struct ad5686_state;

typedef int (*ad5686_write_func)(struct ad5686_state *st,
				 u8 cmd, u8 addr, u16 val);

typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr);

/**
 * struct ad5686_chip_info - chip specific information
 * @int_vref_mv:	AD5620/40/60: the internal reference voltage
 * @num_channels:	number of channels
 * @channel:		channel specification
 * @regmap_type:	register map layout variant
 */

struct ad5686_chip_info {
	u16				int_vref_mv;
	unsigned int			num_channels;
	const struct iio_chan_spec	*channels;
	enum ad5686_regmap_type		regmap_type;
};

/**
 * struct ad5446_state - driver instance specific data
 * @spi:		spi_device
 * @chip_info:		chip model specific constants, available modes etc
 * @reg:		supply regulator
 * @vref_mv:		actual reference voltage used
 * @pwr_down_mask:	power down mask
 * @pwr_down_mode:	current power down mode
 * @use_internal_vref:	set to true if the internal reference voltage is used
 * @lock		lock to protect the data buffer during regmap ops
 * @data:		spi transfer buffers
 */

struct ad5686_state {
	struct device			*dev;
	const struct ad5686_chip_info	*chip_info;
	struct regulator		*reg;
	unsigned short			vref_mv;
	unsigned int			pwr_down_mask;
	unsigned int			pwr_down_mode;
	ad5686_write_func		write;
	ad5686_read_func		read;
	bool				use_internal_vref;
	struct mutex			lock;

	/*
	 * DMA (thus cache coherency maintenance) may require the
	 * transfer buffers to live in their own cache lines.
	 */

	union {
		__be32 d32;
		__be16 d16;
		u8 d8[4];
	} data[3] __aligned(IIO_DMA_MINALIGN);
};


int ad5686_probe(struct device *dev,
		 enum ad5686_supported_device_ids chip_type,
		 const char *name, ad5686_write_func write,
		 ad5686_read_func read);

void ad5686_remove(struct device *dev);


#endif /* __DRIVERS_IIO_DAC_AD5686_H__ */