2 * ADIS16201 Programmable Digital Vibration Sensor driver
4 * Copyright 2010 Analog Devices Inc.
6 * Licensed under the GPL-2 or later.
9 #include <linux/delay.h>
10 #include <linux/mutex.h>
11 #include <linux/device.h>
12 #include <linux/kernel.h>
13 #include <linux/spi/spi.h>
14 #include <linux/slab.h>
15 #include <linux/sysfs.h>
16 #include <linux/module.h>
18 #include <linux/iio/iio.h>
19 #include <linux/iio/sysfs.h>
20 #include <linux/iio/buffer.h>
21 #include <linux/iio/imu/adis.h>
23 #include "adis16201.h"
25 static const u8 adis16201_addresses[] = {
26 [ADIS16201_SCAN_ACC_X] = ADIS16201_XACCL_OFFS,
27 [ADIS16201_SCAN_ACC_Y] = ADIS16201_YACCL_OFFS,
28 [ADIS16201_SCAN_INCLI_X] = ADIS16201_XINCL_OFFS,
29 [ADIS16201_SCAN_INCLI_Y] = ADIS16201_YINCL_OFFS,
32 static int adis16201_read_raw(struct iio_dev *indio_dev,
33 struct iio_chan_spec const *chan,
37 struct adis *st = iio_priv(indio_dev);
44 case IIO_CHAN_INFO_RAW:
45 return adis_single_conversion(indio_dev, chan,
46 ADIS16201_ERROR_ACTIVE, val);
47 case IIO_CHAN_INFO_SCALE:
50 if (chan->channel == 0) {
52 *val2 = 220000; /* 1.22 mV */
55 *val2 = 610000; /* 0.610 mV */
57 return IIO_VAL_INT_PLUS_MICRO;
59 *val = -470; /* 0.47 C */
61 return IIO_VAL_INT_PLUS_MICRO;
64 *val2 = IIO_G_TO_M_S_2(462400); /* 0.4624 mg */
65 return IIO_VAL_INT_PLUS_NANO;
68 *val2 = 100000; /* 0.1 degree */
69 return IIO_VAL_INT_PLUS_MICRO;
74 case IIO_CHAN_INFO_OFFSET:
75 *val = 25000 / -470 - 1278; /* 25 C = 1278 */
77 case IIO_CHAN_INFO_CALIBBIAS:
88 mutex_lock(&indio_dev->mlock);
89 addr = adis16201_addresses[chan->scan_index];
90 ret = adis_read_reg_16(st, addr, &val16);
92 mutex_unlock(&indio_dev->mlock);
95 val16 &= (1 << bits) - 1;
96 val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
98 mutex_unlock(&indio_dev->mlock);
104 static int adis16201_write_raw(struct iio_dev *indio_dev,
105 struct iio_chan_spec const *chan,
110 struct adis *st = iio_priv(indio_dev);
115 case IIO_CHAN_INFO_CALIBBIAS:
116 switch (chan->type) {
126 val16 = val & ((1 << bits) - 1);
127 addr = adis16201_addresses[chan->scan_index];
128 return adis_write_reg_16(st, addr, val16);
133 static const struct iio_chan_spec adis16201_channels[] = {
134 ADIS_SUPPLY_CHAN(ADIS16201_SUPPLY_OUT, ADIS16201_SCAN_SUPPLY, 12),
135 ADIS_TEMP_CHAN(ADIS16201_TEMP_OUT, ADIS16201_SCAN_TEMP, 12),
136 ADIS_ACCEL_CHAN(X, ADIS16201_XACCL_OUT, ADIS16201_SCAN_ACC_X,
137 BIT(IIO_CHAN_INFO_CALIBBIAS), 14),
138 ADIS_ACCEL_CHAN(Y, ADIS16201_YACCL_OUT, ADIS16201_SCAN_ACC_Y,
139 BIT(IIO_CHAN_INFO_CALIBBIAS), 14),
140 ADIS_AUX_ADC_CHAN(ADIS16201_AUX_ADC, ADIS16201_SCAN_AUX_ADC, 12),
141 ADIS_INCLI_CHAN(X, ADIS16201_XINCL_OUT, ADIS16201_SCAN_INCLI_X,
142 BIT(IIO_CHAN_INFO_CALIBBIAS), 14),
143 ADIS_INCLI_CHAN(X, ADIS16201_YINCL_OUT, ADIS16201_SCAN_INCLI_Y,
144 BIT(IIO_CHAN_INFO_CALIBBIAS), 14),
145 IIO_CHAN_SOFT_TIMESTAMP(7)
148 static const struct iio_info adis16201_info = {
149 .read_raw = &adis16201_read_raw,
150 .write_raw = &adis16201_write_raw,
151 .update_scan_mode = adis_update_scan_mode,
152 .driver_module = THIS_MODULE,
155 static const char * const adis16201_status_error_msgs[] = {
156 [ADIS16201_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
157 [ADIS16201_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
158 [ADIS16201_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
159 [ADIS16201_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
162 static const struct adis_data adis16201_data = {
164 .msc_ctrl_reg = ADIS16201_MSC_CTRL,
165 .glob_cmd_reg = ADIS16201_GLOB_CMD,
166 .diag_stat_reg = ADIS16201_DIAG_STAT,
168 .self_test_mask = ADIS16201_MSC_CTRL_SELF_TEST_EN,
169 .startup_delay = ADIS16201_STARTUP_DELAY,
171 .status_error_msgs = adis16201_status_error_msgs,
172 .status_error_mask = BIT(ADIS16201_DIAG_STAT_SPI_FAIL_BIT) |
173 BIT(ADIS16201_DIAG_STAT_FLASH_UPT_BIT) |
174 BIT(ADIS16201_DIAG_STAT_POWER_HIGH_BIT) |
175 BIT(ADIS16201_DIAG_STAT_POWER_LOW_BIT),
178 static int adis16201_probe(struct spi_device *spi)
182 struct iio_dev *indio_dev;
184 /* setup the industrialio driver allocated elements */
185 indio_dev = iio_device_alloc(sizeof(*st));
186 if (indio_dev == NULL) {
190 st = iio_priv(indio_dev);
191 /* this is only used for removal purposes */
192 spi_set_drvdata(spi, indio_dev);
194 indio_dev->name = spi->dev.driver->name;
195 indio_dev->dev.parent = &spi->dev;
196 indio_dev->info = &adis16201_info;
198 indio_dev->channels = adis16201_channels;
199 indio_dev->num_channels = ARRAY_SIZE(adis16201_channels);
200 indio_dev->modes = INDIO_DIRECT_MODE;
202 ret = adis_init(st, indio_dev, spi, &adis16201_data);
205 ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
209 /* Get the device into a sane initial state */
210 ret = adis_initial_startup(st);
212 goto error_cleanup_buffer_trigger;
214 ret = iio_device_register(indio_dev);
216 goto error_cleanup_buffer_trigger;
219 error_cleanup_buffer_trigger:
220 adis_cleanup_buffer_and_trigger(st, indio_dev);
222 iio_device_free(indio_dev);
227 static int adis16201_remove(struct spi_device *spi)
229 struct iio_dev *indio_dev = spi_get_drvdata(spi);
230 struct adis *st = iio_priv(indio_dev);
232 iio_device_unregister(indio_dev);
233 adis_cleanup_buffer_and_trigger(st, indio_dev);
234 iio_device_free(indio_dev);
239 static struct spi_driver adis16201_driver = {
242 .owner = THIS_MODULE,
244 .probe = adis16201_probe,
245 .remove = adis16201_remove,
247 module_spi_driver(adis16201_driver);
249 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
250 MODULE_DESCRIPTION("Analog Devices ADIS16201 Programmable Digital Vibration Sensor driver");
251 MODULE_LICENSE("GPL v2");
252 MODULE_ALIAS("spi:adis16201");