1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * AFE440X Heart Rate Monitors and Low-Cost Pulse Oximeters
4 *
5 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
6 * Andrew F. Davis <afd@ti.com>
7 */
8
9#ifndef _AFE440X_H
10#define _AFE440X_H
11
12/* AFE440X registers */
13#define AFE440X_CONTROL0 0x00
14#define AFE440X_LED2STC 0x01
15#define AFE440X_LED2ENDC 0x02
16#define AFE440X_LED1LEDSTC 0x03
17#define AFE440X_LED1LEDENDC 0x04
18#define AFE440X_ALED2STC 0x05
19#define AFE440X_ALED2ENDC 0x06
20#define AFE440X_LED1STC 0x07
21#define AFE440X_LED1ENDC 0x08
22#define AFE440X_LED2LEDSTC 0x09
23#define AFE440X_LED2LEDENDC 0x0a
24#define AFE440X_ALED1STC 0x0b
25#define AFE440X_ALED1ENDC 0x0c
26#define AFE440X_LED2CONVST 0x0d
27#define AFE440X_LED2CONVEND 0x0e
28#define AFE440X_ALED2CONVST 0x0f
29#define AFE440X_ALED2CONVEND 0x10
30#define AFE440X_LED1CONVST 0x11
31#define AFE440X_LED1CONVEND 0x12
32#define AFE440X_ALED1CONVST 0x13
33#define AFE440X_ALED1CONVEND 0x14
34#define AFE440X_ADCRSTSTCT0 0x15
35#define AFE440X_ADCRSTENDCT0 0x16
36#define AFE440X_ADCRSTSTCT1 0x17
37#define AFE440X_ADCRSTENDCT1 0x18
38#define AFE440X_ADCRSTSTCT2 0x19
39#define AFE440X_ADCRSTENDCT2 0x1a
40#define AFE440X_ADCRSTSTCT3 0x1b
41#define AFE440X_ADCRSTENDCT3 0x1c
42#define AFE440X_PRPCOUNT 0x1d
43#define AFE440X_CONTROL1 0x1e
44#define AFE440X_LEDCNTRL 0x22
45#define AFE440X_CONTROL2 0x23
46#define AFE440X_ALARM 0x29
47#define AFE440X_LED2VAL 0x2a
48#define AFE440X_ALED2VAL 0x2b
49#define AFE440X_LED1VAL 0x2c
50#define AFE440X_ALED1VAL 0x2d
51#define AFE440X_LED2_ALED2VAL 0x2e
52#define AFE440X_LED1_ALED1VAL 0x2f
53#define AFE440X_CONTROL3 0x31
54#define AFE440X_PDNCYCLESTC 0x32
55#define AFE440X_PDNCYCLEENDC 0x33
56
57/* CONTROL0 register fields */
58#define AFE440X_CONTROL0_REG_READ BIT(0)
59#define AFE440X_CONTROL0_TM_COUNT_RST BIT(1)
60#define AFE440X_CONTROL0_SW_RESET BIT(3)
61
62/* CONTROL1 register fields */
63#define AFE440X_CONTROL1_TIMEREN BIT(8)
64
65/* TIAGAIN register fields */
66#define AFE440X_TIAGAIN_ENSEPGAIN BIT(15)
67
68/* CONTROL2 register fields */
69#define AFE440X_CONTROL2_PDN_AFE BIT(0)
70#define AFE440X_CONTROL2_PDN_RX BIT(1)
71#define AFE440X_CONTROL2_DYNAMIC4 BIT(3)
72#define AFE440X_CONTROL2_DYNAMIC3 BIT(4)
73#define AFE440X_CONTROL2_DYNAMIC2 BIT(14)
74#define AFE440X_CONTROL2_DYNAMIC1 BIT(20)
75
76/* CONTROL3 register fields */
77#define AFE440X_CONTROL3_CLKDIV GENMASK(2, 0)
78
79/* CONTROL0 values */
80#define AFE440X_CONTROL0_WRITE 0x0
81#define AFE440X_CONTROL0_READ 0x1
82
83#define AFE440X_INTENSITY_CHAN(_index, _mask) \
84 { \
85 .type = IIO_INTENSITY, \
86 .channel = _index, \
87 .address = _index, \
88 .scan_index = _index, \
89 .scan_type = { \
90 .sign = 's', \
91 .realbits = 24, \
92 .storagebits = 32, \
93 .endianness = IIO_CPU, \
94 }, \
95 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
96 _mask, \
97 .indexed = true, \
98 }
99
100#define AFE440X_CURRENT_CHAN(_index) \
101 { \
102 .type = IIO_CURRENT, \
103 .channel = _index, \
104 .address = _index, \
105 .scan_index = -1, \
106 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
107 BIT(IIO_CHAN_INFO_SCALE), \
108 .indexed = true, \
109 .output = true, \
110 }
111
112struct afe440x_val_table {
113 int integer;
114 int fract;
115};
116
117#define AFE440X_TABLE_ATTR(_name, _table) \
118static ssize_t _name ## _show(struct device *dev, \
119 struct device_attribute *attr, char *buf) \
120{ \
121 ssize_t len = 0; \
122 int i; \
123 \
124 for (i = 0; i < ARRAY_SIZE(_table); i++) \
125 len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06u ", \
126 _table[i].integer, \
127 _table[i].fract); \
128 \
129 buf[len - 1] = '\n'; \
130 \
131 return len; \
132} \
133static DEVICE_ATTR_RO(_name)
134
135struct afe440x_attr {
136 struct device_attribute dev_attr;
137 unsigned int field;
138 const struct afe440x_val_table *val_table;
139 unsigned int table_size;
140};
141
142#define to_afe440x_attr(_dev_attr) \
143 container_of(_dev_attr, struct afe440x_attr, dev_attr)
144
145#define AFE440X_ATTR(_name, _field, _table) \
146 struct afe440x_attr afe440x_attr_##_name = { \
147 .dev_attr = __ATTR(_name, (S_IRUGO | S_IWUSR), \
148 afe440x_show_register, \
149 afe440x_store_register), \
150 .field = _field, \
151 .val_table = _table, \
152 .table_size = ARRAY_SIZE(_table), \
153 }
154
155#endif /* _AFE440X_H */
156

source code of linux/drivers/iio/health/afe440x.h