linux/drivers/iio/health/afe440x.h
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   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