drivers/staging/iio/accel/adis16203.c

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This source file includes following definitions.
adis16203_write_raw
adis16203_read_raw
adis16203_probe
adis16203_remove
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * ADIS16203 Programmable 360 Degrees Inclinometer
   4  *
   5  * Copyright 2010 Analog Devices Inc.
   6  */
   7 
   8 #include <linux/delay.h>
   9 #include <linux/device.h>
  10 
  11 #include <linux/iio/buffer.h>
  12 #include <linux/iio/iio.h>
  13 #include <linux/iio/imu/adis.h>
  14 #include <linux/iio/sysfs.h>
  15 
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/mutex.h>
  19 #include <linux/slab.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/sysfs.h>
  22 
  23 #define ADIS16203_STARTUP_DELAY 220 /* ms */
  24 
  25 /* Flash memory write count */
  26 #define ADIS16203_FLASH_CNT      0x00
  27 
  28 /* Output, power supply */
  29 #define ADIS16203_SUPPLY_OUT     0x02
  30 
  31 /* Output, auxiliary ADC input */
  32 #define ADIS16203_AUX_ADC        0x08
  33 
  34 /* Output, temperature */
  35 #define ADIS16203_TEMP_OUT       0x0A
  36 
  37 /* Output, x-axis inclination */
  38 #define ADIS16203_XINCL_OUT      0x0C
  39 
  40 /* Output, y-axis inclination */
  41 #define ADIS16203_YINCL_OUT      0x0E
  42 
  43 /* Incline null calibration */
  44 #define ADIS16203_INCL_NULL      0x18
  45 
  46 /* Alarm 1 amplitude threshold */
  47 #define ADIS16203_ALM_MAG1       0x20
  48 
  49 /* Alarm 2 amplitude threshold */
  50 #define ADIS16203_ALM_MAG2       0x22
  51 
  52 /* Alarm 1, sample period */
  53 #define ADIS16203_ALM_SMPL1      0x24
  54 
  55 /* Alarm 2, sample period */
  56 #define ADIS16203_ALM_SMPL2      0x26
  57 
  58 /* Alarm control */
  59 #define ADIS16203_ALM_CTRL       0x28
  60 
  61 /* Auxiliary DAC data */
  62 #define ADIS16203_AUX_DAC        0x30
  63 
  64 /* General-purpose digital input/output control */
  65 #define ADIS16203_GPIO_CTRL      0x32
  66 
  67 /* Miscellaneous control */
  68 #define ADIS16203_MSC_CTRL       0x34
  69 
  70 /* Internal sample period (rate) control */
  71 #define ADIS16203_SMPL_PRD       0x36
  72 
  73 /* Operation, filter configuration */
  74 #define ADIS16203_AVG_CNT        0x38
  75 
  76 /* Operation, sleep mode control */
  77 #define ADIS16203_SLP_CNT        0x3A
  78 
  79 /* Diagnostics, system status register */
  80 #define ADIS16203_DIAG_STAT      0x3C
  81 
  82 /* Operation, system command register */
  83 #define ADIS16203_GLOB_CMD       0x3E
  84 
  85 /* MSC_CTRL */
  86 
  87 /* Self-test at power-on: 1 = disabled, 0 = enabled */
  88 #define ADIS16203_MSC_CTRL_PWRUP_SELF_TEST      BIT(10)
  89 
  90 /* Reverses rotation of both inclination outputs */
  91 #define ADIS16203_MSC_CTRL_REVERSE_ROT_EN       BIT(9)
  92 
  93 /* Self-test enable */
  94 #define ADIS16203_MSC_CTRL_SELF_TEST_EN         BIT(8)
  95 
  96 /* Data-ready enable: 1 = enabled, 0 = disabled */
  97 #define ADIS16203_MSC_CTRL_DATA_RDY_EN          BIT(2)
  98 
  99 /* Data-ready polarity: 1 = active high, 0 = active low */
 100 #define ADIS16203_MSC_CTRL_ACTIVE_HIGH          BIT(1)
 101 
 102 /* Data-ready line selection: 1 = DIO1, 0 = DIO0 */
 103 #define ADIS16203_MSC_CTRL_DATA_RDY_DIO1        BIT(0)
 104 
 105 /* DIAG_STAT */
 106 
 107 /* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
 108 #define ADIS16203_DIAG_STAT_ALARM2        BIT(9)
 109 
 110 /* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
 111 #define ADIS16203_DIAG_STAT_ALARM1        BIT(8)
 112 
 113 /* Self-test diagnostic error flag */
 114 #define ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT 5
 115 
 116 /* SPI communications failure */
 117 #define ADIS16203_DIAG_STAT_SPI_FAIL_BIT      3
 118 
 119 /* Flash update failure */
 120 #define ADIS16203_DIAG_STAT_FLASH_UPT_BIT     2
 121 
 122 /* Power supply above 3.625 V */
 123 #define ADIS16203_DIAG_STAT_POWER_HIGH_BIT    1
 124 
 125 /* Power supply below 2.975 V */
 126 #define ADIS16203_DIAG_STAT_POWER_LOW_BIT     0
 127 
 128 /* GLOB_CMD */
 129 
 130 #define ADIS16203_GLOB_CMD_SW_RESET     BIT(7)
 131 #define ADIS16203_GLOB_CMD_CLEAR_STAT   BIT(4)
 132 #define ADIS16203_GLOB_CMD_FACTORY_CAL  BIT(1)
 133 
 134 #define ADIS16203_ERROR_ACTIVE          BIT(14)
 135 
 136 enum adis16203_scan {
 137          ADIS16203_SCAN_INCLI_X,
 138          ADIS16203_SCAN_INCLI_Y,
 139          ADIS16203_SCAN_SUPPLY,
 140          ADIS16203_SCAN_AUX_ADC,
 141          ADIS16203_SCAN_TEMP,
 142 };
 143 
 144 #define DRIVER_NAME             "adis16203"
 145 
 146 static const u8 adis16203_addresses[] = {
 147         [ADIS16203_SCAN_INCLI_X] = ADIS16203_INCL_NULL,
 148 };
 149 
 150 static int adis16203_write_raw(struct iio_dev *indio_dev,
 151                                struct iio_chan_spec const *chan,
 152                                int val,
 153                                int val2,
 154                                long mask)
 155 {
 156         struct adis *st = iio_priv(indio_dev);
 157         /* currently only one writable parameter which keeps this simple */
 158         u8 addr = adis16203_addresses[chan->scan_index];
 159 
 160         return adis_write_reg_16(st, addr, val & 0x3FFF);
 161 }
 162 
 163 static int adis16203_read_raw(struct iio_dev *indio_dev,
 164                               struct iio_chan_spec const *chan,
 165                               int *val, int *val2,
 166                               long mask)
 167 {
 168         struct adis *st = iio_priv(indio_dev);
 169         int ret;
 170         u8 addr;
 171         s16 val16;
 172 
 173         switch (mask) {
 174         case IIO_CHAN_INFO_RAW:
 175                 return adis_single_conversion(indio_dev, chan,
 176                                 ADIS16203_ERROR_ACTIVE, val);
 177         case IIO_CHAN_INFO_SCALE:
 178                 switch (chan->type) {
 179                 case IIO_VOLTAGE:
 180                         if (chan->channel == 0) {
 181                                 *val = 1;
 182                                 *val2 = 220000; /* 1.22 mV */
 183                         } else {
 184                                 *val = 0;
 185                                 *val2 = 610000; /* 0.61 mV */
 186                         }
 187                         return IIO_VAL_INT_PLUS_MICRO;
 188                 case IIO_TEMP:
 189                         *val = -470; /* -0.47 C */
 190                         *val2 = 0;
 191                         return IIO_VAL_INT_PLUS_MICRO;
 192                 case IIO_INCLI:
 193                         *val = 0;
 194                         *val2 = 25000; /* 0.025 degree */
 195                         return IIO_VAL_INT_PLUS_MICRO;
 196                 default:
 197                         return -EINVAL;
 198                 }
 199         case IIO_CHAN_INFO_OFFSET:
 200                 *val = 25000 / -470 - 1278; /* 25 C = 1278 */
 201                 return IIO_VAL_INT;
 202         case IIO_CHAN_INFO_CALIBBIAS:
 203                 addr = adis16203_addresses[chan->scan_index];
 204                 ret = adis_read_reg_16(st, addr, &val16);
 205                 if (ret)
 206                         return ret;
 207                 *val = sign_extend32(val16, 13);
 208                 return IIO_VAL_INT;
 209         default:
 210                 return -EINVAL;
 211         }
 212 }
 213 
 214 static const struct iio_chan_spec adis16203_channels[] = {
 215         ADIS_SUPPLY_CHAN(ADIS16203_SUPPLY_OUT, ADIS16203_SCAN_SUPPLY, 0, 12),
 216         ADIS_AUX_ADC_CHAN(ADIS16203_AUX_ADC, ADIS16203_SCAN_AUX_ADC, 0, 12),
 217         ADIS_INCLI_CHAN(X, ADIS16203_XINCL_OUT, ADIS16203_SCAN_INCLI_X,
 218                         BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
 219         /* Fixme: Not what it appears to be - see data sheet */
 220         ADIS_INCLI_CHAN(Y, ADIS16203_YINCL_OUT, ADIS16203_SCAN_INCLI_Y,
 221                         0, 0, 14),
 222         ADIS_TEMP_CHAN(ADIS16203_TEMP_OUT, ADIS16203_SCAN_TEMP, 0, 12),
 223         IIO_CHAN_SOFT_TIMESTAMP(5),
 224 };
 225 
 226 static const struct iio_info adis16203_info = {
 227         .read_raw = adis16203_read_raw,
 228         .write_raw = adis16203_write_raw,
 229         .update_scan_mode = adis_update_scan_mode,
 230 };
 231 
 232 static const char * const adis16203_status_error_msgs[] = {
 233         [ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
 234         [ADIS16203_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
 235         [ADIS16203_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
 236         [ADIS16203_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
 237         [ADIS16203_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
 238 };
 239 
 240 static const struct adis_data adis16203_data = {
 241         .read_delay = 20,
 242         .msc_ctrl_reg = ADIS16203_MSC_CTRL,
 243         .glob_cmd_reg = ADIS16203_GLOB_CMD,
 244         .diag_stat_reg = ADIS16203_DIAG_STAT,
 245 
 246         .self_test_mask = ADIS16203_MSC_CTRL_SELF_TEST_EN,
 247         .self_test_no_autoclear = true,
 248         .startup_delay = ADIS16203_STARTUP_DELAY,
 249 
 250         .status_error_msgs = adis16203_status_error_msgs,
 251         .status_error_mask = BIT(ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT) |
 252                 BIT(ADIS16203_DIAG_STAT_SPI_FAIL_BIT) |
 253                 BIT(ADIS16203_DIAG_STAT_FLASH_UPT_BIT) |
 254                 BIT(ADIS16203_DIAG_STAT_POWER_HIGH_BIT) |
 255                 BIT(ADIS16203_DIAG_STAT_POWER_LOW_BIT),
 256 };
 257 
 258 static int adis16203_probe(struct spi_device *spi)
 259 {
 260         int ret;
 261         struct iio_dev *indio_dev;
 262         struct adis *st;
 263 
 264         /* setup the industrialio driver allocated elements */
 265         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
 266         if (!indio_dev)
 267                 return -ENOMEM;
 268         st = iio_priv(indio_dev);
 269         /* this is only used for removal purposes */
 270         spi_set_drvdata(spi, indio_dev);
 271 
 272         indio_dev->name = spi->dev.driver->name;
 273         indio_dev->dev.parent = &spi->dev;
 274         indio_dev->channels = adis16203_channels;
 275         indio_dev->num_channels = ARRAY_SIZE(adis16203_channels);
 276         indio_dev->info = &adis16203_info;
 277         indio_dev->modes = INDIO_DIRECT_MODE;
 278 
 279         ret = adis_init(st, indio_dev, spi, &adis16203_data);
 280         if (ret)
 281                 return ret;
 282 
 283         ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
 284         if (ret)
 285                 return ret;
 286 
 287         /* Get the device into a sane initial state */
 288         ret = adis_initial_startup(st);
 289         if (ret)
 290                 goto error_cleanup_buffer_trigger;
 291 
 292         ret = iio_device_register(indio_dev);
 293         if (ret)
 294                 goto error_cleanup_buffer_trigger;
 295 
 296         return 0;
 297 
 298 error_cleanup_buffer_trigger:
 299         adis_cleanup_buffer_and_trigger(st, indio_dev);
 300         return ret;
 301 }
 302 
 303 static int adis16203_remove(struct spi_device *spi)
 304 {
 305         struct iio_dev *indio_dev = spi_get_drvdata(spi);
 306         struct adis *st = iio_priv(indio_dev);
 307 
 308         iio_device_unregister(indio_dev);
 309         adis_cleanup_buffer_and_trigger(st, indio_dev);
 310 
 311         return 0;
 312 }
 313 
 314 static const struct of_device_id adis16203_of_match[] = {
 315         { .compatible = "adi,adis16203" },
 316         { },
 317 };
 318 
 319 MODULE_DEVICE_TABLE(of, adis16203_of_match);
 320 
 321 static struct spi_driver adis16203_driver = {
 322         .driver = {
 323                 .name = "adis16203",
 324                 .of_match_table = adis16203_of_match,
 325         },
 326         .probe = adis16203_probe,
 327         .remove = adis16203_remove,
 328 };
 329 module_spi_driver(adis16203_driver);
 330 
 331 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 332 MODULE_DESCRIPTION("Analog Devices ADIS16203 Programmable 360 Degrees Inclinometer");
 333 MODULE_LICENSE("GPL v2");
 334 MODULE_ALIAS("spi:adis16203");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/staging/iio/accel/adis16203.c

DEFINITIONS
