LXR linux/drivers/iio/health/afe440x.h

   1/*
   2 * AFE440X Heart Rate Monitors and Low-Cost Pulse Oximeters
   3 *
   4 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
   5 *      Andrew F. Davis <afd@ti.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful, but
  12 * WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * General Public License for more details.
  15 */
  16
  17#ifndef _AFE440X_H
  18#define _AFE440X_H
  19
  20/* AFE440X registers */
  21#define AFE440X_CONTROL0                0x00
  22#define AFE440X_LED2STC                 0x01
  23#define AFE440X_LED2ENDC                0x02
  24#define AFE440X_LED1LEDSTC              0x03
  25#define AFE440X_LED1LEDENDC             0x04
  26#define AFE440X_ALED2STC                0x05
  27#define AFE440X_ALED2ENDC               0x06
  28#define AFE440X_LED1STC                 0x07
  29#define AFE440X_LED1ENDC                0x08
  30#define AFE440X_LED2LEDSTC              0x09
  31#define AFE440X_LED2LEDENDC             0x0a
  32#define AFE440X_ALED1STC                0x0b
  33#define AFE440X_ALED1ENDC               0x0c
  34#define AFE440X_LED2CONVST              0x0d
  35#define AFE440X_LED2CONVEND             0x0e
  36#define AFE440X_ALED2CONVST             0x0f
  37#define AFE440X_ALED2CONVEND            0x10
  38#define AFE440X_LED1CONVST              0x11
  39#define AFE440X_LED1CONVEND             0x12
  40#define AFE440X_ALED1CONVST             0x13
  41#define AFE440X_ALED1CONVEND            0x14
  42#define AFE440X_ADCRSTSTCT0             0x15
  43#define AFE440X_ADCRSTENDCT0            0x16
  44#define AFE440X_ADCRSTSTCT1             0x17
  45#define AFE440X_ADCRSTENDCT1            0x18
  46#define AFE440X_ADCRSTSTCT2             0x19
  47#define AFE440X_ADCRSTENDCT2            0x1a
  48#define AFE440X_ADCRSTSTCT3             0x1b
  49#define AFE440X_ADCRSTENDCT3            0x1c
  50#define AFE440X_PRPCOUNT                0x1d
  51#define AFE440X_CONTROL1                0x1e
  52#define AFE440X_LEDCNTRL                0x22
  53#define AFE440X_CONTROL2                0x23
  54#define AFE440X_ALARM                   0x29
  55#define AFE440X_LED2VAL                 0x2a
  56#define AFE440X_ALED2VAL                0x2b
  57#define AFE440X_LED1VAL                 0x2c
  58#define AFE440X_ALED1VAL                0x2d
  59#define AFE440X_LED2_ALED2VAL           0x2e
  60#define AFE440X_LED1_ALED1VAL           0x2f
  61#define AFE440X_CONTROL3                0x31
  62#define AFE440X_PDNCYCLESTC             0x32
  63#define AFE440X_PDNCYCLEENDC            0x33
  64
  65/* CONTROL0 register fields */
  66#define AFE440X_CONTROL0_REG_READ       BIT(0)
  67#define AFE440X_CONTROL0_TM_COUNT_RST   BIT(1)
  68#define AFE440X_CONTROL0_SW_RESET       BIT(3)
  69
  70/* CONTROL1 register fields */
  71#define AFE440X_CONTROL1_TIMEREN        BIT(8)
  72
  73/* TIAGAIN register fields */
  74#define AFE440X_TIAGAIN_ENSEPGAIN       BIT(15)
  75
  76/* CONTROL2 register fields */
  77#define AFE440X_CONTROL2_PDN_AFE        BIT(0)
  78#define AFE440X_CONTROL2_PDN_RX         BIT(1)
  79#define AFE440X_CONTROL2_DYNAMIC4       BIT(3)
  80#define AFE440X_CONTROL2_DYNAMIC3       BIT(4)
  81#define AFE440X_CONTROL2_DYNAMIC2       BIT(14)
  82#define AFE440X_CONTROL2_DYNAMIC1       BIT(20)
  83
  84/* CONTROL3 register fields */
  85#define AFE440X_CONTROL3_CLKDIV         GENMASK(2, 0)
  86
  87/* CONTROL0 values */
  88#define AFE440X_CONTROL0_WRITE          0x0
  89#define AFE440X_CONTROL0_READ           0x1
  90
  91#define AFE440X_INTENSITY_CHAN(_index, _mask)                   \
  92        {                                                       \
  93                .type = IIO_INTENSITY,                          \
  94                .channel = _index,                              \
  95                .address = _index,                              \
  96                .scan_index = _index,                           \
  97                .scan_type = {                                  \
  98                                .sign = 's',                    \
  99                                .realbits = 24,                 \
 100                                .storagebits = 32,              \
 101                                .endianness = IIO_CPU,          \
 102                },                                              \
 103                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |  \
 104                        _mask,                                  \
 105                .indexed = true,                                \
 106        }
 107
 108#define AFE440X_CURRENT_CHAN(_index)                            \
 109        {                                                       \
 110                .type = IIO_CURRENT,                            \
 111                .channel = _index,                              \
 112                .address = _index,                              \
 113                .scan_index = -1,                               \
 114                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |  \
 115                        BIT(IIO_CHAN_INFO_SCALE),               \
 116                .indexed = true,                                \
 117                .output = true,                                 \
 118        }
 119
 120struct afe440x_val_table {
 121        int integer;
 122        int fract;
 123};
 124
 125#define AFE440X_TABLE_ATTR(_name, _table)                               \
 126static ssize_t _name ## _show(struct device *dev,                       \
 127                              struct device_attribute *attr, char *buf) \
 128{                                                                       \
 129        ssize_t len = 0;                                                \
 130        int i;                                                          \
 131                                                                        \
 132        for (i = 0; i < ARRAY_SIZE(_table); i++)                        \
 133                len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06u ", \
 134                                 _table[i].integer,                     \
 135                                 _table[i].fract);                      \
 136                                                                        \
 137        buf[len - 1] = '\n';                                            \
 138                                                                        \
 139        return len;                                                     \
 140}                                                                       \
 141static DEVICE_ATTR_RO(_name)
 142
 143struct afe440x_attr {
 144        struct device_attribute dev_attr;
 145        unsigned int field;
 146        const struct afe440x_val_table *val_table;
 147        unsigned int table_size;
 148};
 149
 150#define to_afe440x_attr(_dev_attr)                              \
 151        container_of(_dev_attr, struct afe440x_attr, dev_attr)
 152
 153#define AFE440X_ATTR(_name, _field, _table)                     \
 154        struct afe440x_attr afe440x_attr_##_name = {            \
 155                .dev_attr = __ATTR(_name, (S_IRUGO | S_IWUSR),  \
 156                                   afe440x_show_register,       \
 157                                   afe440x_store_register),     \
 158                .field = _field,                                \
 159                .val_table = _table,                            \
 160                .table_size = ARRAY_SIZE(_table),               \
 161        }
 162
 163#endif /* _AFE440X_H */
 164