drivers/iio/health/afe440x.h

   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
 112 struct afe440x_val_table {
 113         int integer;
 114         int fract;
 115 };
 116
 117 #define AFE440X_TABLE_ATTR(_name, _table)                               \
 118 static 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 }                                                                       \
 133 static DEVICE_ATTR_RO(_name)
 134
 135 struct 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 */