2 * ADIS16204 Programmable High-g Digital Impact Sensor and Recorder
4 * Copyright 2010 Analog Devices Inc.
6 * Licensed under the GPL-2 or later.
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/delay.h>
12 #include <linux/mutex.h>
13 #include <linux/device.h>
14 #include <linux/kernel.h>
15 #include <linux/spi/spi.h>
16 #include <linux/slab.h>
17 #include <linux/sysfs.h>
18 #include <linux/list.h>
19 #include <linux/module.h>
21 #include <linux/iio/iio.h>
22 #include <linux/iio/sysfs.h>
23 #include <linux/iio/buffer.h>
24 #include <linux/iio/imu/adis.h>
26 #include "adis16204.h"
28 /* Unique to this driver currently */
30 static const u8 adis16204_addresses[][2] = {
31 [ADIS16204_SCAN_ACC_X] = { ADIS16204_XACCL_NULL, ADIS16204_X_PEAK_OUT },
32 [ADIS16204_SCAN_ACC_Y] = { ADIS16204_YACCL_NULL, ADIS16204_Y_PEAK_OUT },
33 [ADIS16204_SCAN_ACC_XY] = { 0, ADIS16204_XY_PEAK_OUT },
36 static int adis16204_read_raw(struct iio_dev *indio_dev,
37 struct iio_chan_spec const *chan,
41 struct adis *st = iio_priv(indio_dev);
49 case IIO_CHAN_INFO_RAW:
50 return adis_single_conversion(indio_dev, chan,
51 ADIS16204_ERROR_ACTIVE, val);
52 case IIO_CHAN_INFO_SCALE:
55 if (chan->channel == 0) {
57 *val2 = 220000; /* 1.22 mV */
60 *val2 = 610000; /* 0.61 mV */
62 return IIO_VAL_INT_PLUS_MICRO;
64 *val = -470; /* 0.47 C */
66 return IIO_VAL_INT_PLUS_MICRO;
69 switch (chan->channel2) {
71 case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
72 *val2 = IIO_G_TO_M_S_2(17125); /* 17.125 mg */
76 *val2 = IIO_G_TO_M_S_2(8407); /* 8.407 mg */
79 return IIO_VAL_INT_PLUS_MICRO;
84 case IIO_CHAN_INFO_OFFSET:
85 *val = 25000 / -470 - 1278; /* 25 C = 1278 */
87 case IIO_CHAN_INFO_CALIBBIAS:
88 case IIO_CHAN_INFO_PEAK:
89 if (mask == IIO_CHAN_INFO_CALIBBIAS) {
92 } else { /* PEAK_SEPARATE */
96 mutex_lock(&indio_dev->mlock);
97 addr = adis16204_addresses[chan->scan_index][addrind];
98 ret = adis_read_reg_16(st, addr, &val16);
100 mutex_unlock(&indio_dev->mlock);
103 val16 &= (1 << bits) - 1;
104 val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
106 mutex_unlock(&indio_dev->mlock);
112 static int adis16204_write_raw(struct iio_dev *indio_dev,
113 struct iio_chan_spec const *chan,
118 struct adis *st = iio_priv(indio_dev);
124 case IIO_CHAN_INFO_CALIBBIAS:
125 switch (chan->type) {
132 val16 = val & ((1 << bits) - 1);
133 addr = adis16204_addresses[chan->scan_index][1];
134 return adis_write_reg_16(st, addr, val16);
139 static const struct iio_chan_spec adis16204_channels[] = {
140 ADIS_SUPPLY_CHAN(ADIS16204_SUPPLY_OUT, ADIS16204_SCAN_SUPPLY, 0, 12),
141 ADIS_AUX_ADC_CHAN(ADIS16204_AUX_ADC, ADIS16204_SCAN_AUX_ADC, 0, 12),
142 ADIS_TEMP_CHAN(ADIS16204_TEMP_OUT, ADIS16204_SCAN_TEMP, 0, 12),
143 ADIS_ACCEL_CHAN(X, ADIS16204_XACCL_OUT, ADIS16204_SCAN_ACC_X,
144 BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
146 ADIS_ACCEL_CHAN(Y, ADIS16204_YACCL_OUT, ADIS16204_SCAN_ACC_Y,
147 BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_PEAK),
149 ADIS_ACCEL_CHAN(ROOT_SUM_SQUARED_X_Y, ADIS16204_XY_RSS_OUT,
150 ADIS16204_SCAN_ACC_XY, BIT(IIO_CHAN_INFO_PEAK), 0, 14),
151 IIO_CHAN_SOFT_TIMESTAMP(5),
154 static const struct iio_info adis16204_info = {
155 .read_raw = &adis16204_read_raw,
156 .write_raw = &adis16204_write_raw,
157 .update_scan_mode = adis_update_scan_mode,
158 .driver_module = THIS_MODULE,
161 static const char * const adis16204_status_error_msgs[] = {
162 [ADIS16204_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
163 [ADIS16204_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
164 [ADIS16204_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
165 [ADIS16204_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
166 [ADIS16204_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 2.975V",
169 static const struct adis_data adis16204_data = {
171 .msc_ctrl_reg = ADIS16204_MSC_CTRL,
172 .glob_cmd_reg = ADIS16204_GLOB_CMD,
173 .diag_stat_reg = ADIS16204_DIAG_STAT,
175 .self_test_mask = ADIS16204_MSC_CTRL_SELF_TEST_EN,
176 .startup_delay = ADIS16204_STARTUP_DELAY,
178 .status_error_msgs = adis16204_status_error_msgs,
179 .status_error_mask = BIT(ADIS16204_DIAG_STAT_SELFTEST_FAIL_BIT) |
180 BIT(ADIS16204_DIAG_STAT_SPI_FAIL_BIT) |
181 BIT(ADIS16204_DIAG_STAT_FLASH_UPT_BIT) |
182 BIT(ADIS16204_DIAG_STAT_POWER_HIGH_BIT) |
183 BIT(ADIS16204_DIAG_STAT_POWER_LOW_BIT),
186 static int adis16204_probe(struct spi_device *spi)
190 struct iio_dev *indio_dev;
192 /* setup the industrialio driver allocated elements */
193 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
196 st = iio_priv(indio_dev);
197 /* this is only used for removal purposes */
198 spi_set_drvdata(spi, indio_dev);
200 indio_dev->name = spi->dev.driver->name;
201 indio_dev->dev.parent = &spi->dev;
202 indio_dev->info = &adis16204_info;
203 indio_dev->channels = adis16204_channels;
204 indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
205 indio_dev->modes = INDIO_DIRECT_MODE;
207 ret = adis_init(st, indio_dev, spi, &adis16204_data);
211 ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
215 /* Get the device into a sane initial state */
216 ret = adis_initial_startup(st);
218 goto error_cleanup_buffer_trigger;
219 ret = iio_device_register(indio_dev);
221 goto error_cleanup_buffer_trigger;
225 error_cleanup_buffer_trigger:
226 adis_cleanup_buffer_and_trigger(st, indio_dev);
230 static int adis16204_remove(struct spi_device *spi)
232 struct iio_dev *indio_dev = spi_get_drvdata(spi);
233 struct adis *st = iio_priv(indio_dev);
235 iio_device_unregister(indio_dev);
236 adis_cleanup_buffer_and_trigger(st, indio_dev);
241 static struct spi_driver adis16204_driver = {
245 .probe = adis16204_probe,
246 .remove = adis16204_remove,
248 module_spi_driver(adis16204_driver);
250 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
251 MODULE_DESCRIPTION("ADIS16204 High-g Digital Impact Sensor and Recorder");
252 MODULE_LICENSE("GPL v2");
253 MODULE_ALIAS("spi:adis16204");