2 * ADIS16220 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>
21 #include "adis16220.h"
23 static ssize_t adis16220_read_16bit(struct device *dev,
24 struct device_attribute *attr,
27 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
28 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
29 struct adis16220_state *st = iio_priv(indio_dev);
33 /* Take the iio_dev status lock */
34 mutex_lock(&indio_dev->mlock);
35 ret = adis_read_reg_16(&st->adis, this_attr->address,
37 mutex_unlock(&indio_dev->mlock);
40 return sprintf(buf, "%d\n", val);
43 static ssize_t adis16220_write_16bit(struct device *dev,
44 struct device_attribute *attr,
48 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
49 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
50 struct adis16220_state *st = iio_priv(indio_dev);
54 ret = kstrtou16(buf, 10, &val);
57 ret = adis_write_reg_16(&st->adis, this_attr->address, val);
60 return ret ? ret : len;
63 static int adis16220_capture(struct iio_dev *indio_dev)
65 struct adis16220_state *st = iio_priv(indio_dev);
68 /* initiates a manual data capture */
69 ret = adis_write_reg_16(&st->adis, ADIS16220_GLOB_CMD, 0xBF08);
71 dev_err(&indio_dev->dev, "problem beginning capture");
73 msleep(10); /* delay for capture to finish */
78 static ssize_t adis16220_write_capture(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t len)
82 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
86 ret = strtobool(buf, &val);
91 ret = adis16220_capture(indio_dev);
98 static ssize_t adis16220_capture_buffer_read(struct iio_dev *indio_dev,
104 struct adis16220_state *st = iio_priv(indio_dev);
105 struct spi_message msg;
106 struct spi_transfer xfers[] = {
124 if (unlikely(!count))
127 if ((off >= ADIS16220_CAPTURE_SIZE) || (count & 1) || (off & 1))
130 if (off + count > ADIS16220_CAPTURE_SIZE)
131 count = ADIS16220_CAPTURE_SIZE - off;
133 /* write the begin position of capture buffer */
134 ret = adis_write_reg_16(&st->adis,
140 /* read count/2 values from capture buffer */
141 mutex_lock(&st->buf_lock);
144 for (i = 0; i < count; i += 2) {
145 st->tx[i] = ADIS_READ_REG(addr);
148 xfers[1].len = count;
150 spi_message_init(&msg);
151 spi_message_add_tail(&xfers[0], &msg);
152 spi_message_add_tail(&xfers[1], &msg);
153 ret = spi_sync(st->adis.spi, &msg);
156 mutex_unlock(&st->buf_lock);
160 memcpy(buf, st->rx, count);
162 mutex_unlock(&st->buf_lock);
166 static ssize_t adis16220_accel_bin_read(struct file *filp, struct kobject *kobj,
167 struct bin_attribute *attr,
172 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
174 return adis16220_capture_buffer_read(indio_dev, buf,
176 ADIS16220_CAPT_BUFA);
179 static struct bin_attribute accel_bin = {
184 .read = adis16220_accel_bin_read,
185 .size = ADIS16220_CAPTURE_SIZE,
188 static ssize_t adis16220_adc1_bin_read(struct file *filp, struct kobject *kobj,
189 struct bin_attribute *attr,
190 char *buf, loff_t off,
193 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
195 return adis16220_capture_buffer_read(indio_dev, buf,
197 ADIS16220_CAPT_BUF1);
200 static struct bin_attribute adc1_bin = {
205 .read = adis16220_adc1_bin_read,
206 .size = ADIS16220_CAPTURE_SIZE,
209 static ssize_t adis16220_adc2_bin_read(struct file *filp, struct kobject *kobj,
210 struct bin_attribute *attr,
211 char *buf, loff_t off,
214 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
216 return adis16220_capture_buffer_read(indio_dev, buf,
218 ADIS16220_CAPT_BUF2);
222 static struct bin_attribute adc2_bin = {
227 .read = adis16220_adc2_bin_read,
228 .size = ADIS16220_CAPTURE_SIZE,
231 #define IIO_DEV_ATTR_CAPTURE(_store) \
232 IIO_DEVICE_ATTR(capture, S_IWUSR, NULL, _store, 0)
234 static IIO_DEV_ATTR_CAPTURE(adis16220_write_capture);
236 #define IIO_DEV_ATTR_CAPTURE_COUNT(_mode, _show, _store, _addr) \
237 IIO_DEVICE_ATTR(capture_count, _mode, _show, _store, _addr)
239 static IIO_DEV_ATTR_CAPTURE_COUNT(S_IWUSR | S_IRUGO,
240 adis16220_read_16bit,
241 adis16220_write_16bit,
242 ADIS16220_CAPT_PNTR);
244 enum adis16220_channel {
245 in_supply, in_1, in_2, accel, temp
248 struct adis16220_address_spec {
254 /* Address / bits / signed */
255 static const struct adis16220_address_spec adis16220_addresses[][3] = {
256 [in_supply] = { { ADIS16220_CAPT_SUPPLY, 12, 0 }, },
257 [in_1] = { { ADIS16220_CAPT_BUF1, 16, 1 },
258 { ADIS16220_AIN1_NULL, 16, 1 },
259 { ADIS16220_CAPT_PEAK1, 16, 1 }, },
260 [in_2] = { { ADIS16220_CAPT_BUF2, 16, 1 },
261 { ADIS16220_AIN2_NULL, 16, 1 },
262 { ADIS16220_CAPT_PEAK2, 16, 1 }, },
263 [accel] = { { ADIS16220_CAPT_BUFA, 16, 1 },
264 { ADIS16220_ACCL_NULL, 16, 1 },
265 { ADIS16220_CAPT_PEAKA, 16, 1 }, },
266 [temp] = { { ADIS16220_CAPT_TEMP, 12, 0 }, }
269 static int adis16220_read_raw(struct iio_dev *indio_dev,
270 struct iio_chan_spec const *chan,
274 struct adis16220_state *st = iio_priv(indio_dev);
275 const struct adis16220_address_spec *addr;
283 case IIO_CHAN_INFO_RAW:
286 case IIO_CHAN_INFO_OFFSET:
287 if (chan->type == IIO_TEMP) {
288 *val = 25000 / -470 - 1278; /* 25 C = 1278 */
293 case IIO_CHAN_INFO_PEAK:
296 case IIO_CHAN_INFO_SCALE:
297 switch (chan->type) {
299 *val = -470; /* -0.47 C */
301 return IIO_VAL_INT_PLUS_MICRO;
303 *val2 = IIO_G_TO_M_S_2(19073); /* 19.073 g */
304 return IIO_VAL_INT_PLUS_MICRO;
306 if (chan->channel == 0) {
308 *val2 = 220700; /* 1.2207 mV */
310 /* Should really be dependent on VDD */
311 *val2 = 305180; /* 305.18 uV */
313 return IIO_VAL_INT_PLUS_MICRO;
320 addr = &adis16220_addresses[chan->address][addrind];
322 ret = adis_read_reg_16(&st->adis, addr->addr, &sval);
326 sval &= (1 << bits) - 1;
327 sval = (s16)(sval << (16 - bits)) >> (16 - bits);
331 ret = adis_read_reg_16(&st->adis, addr->addr, &uval);
335 uval &= (1 << bits) - 1;
341 static const struct iio_chan_spec adis16220_channels[] = {
346 .extend_name = "supply",
347 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
348 BIT(IIO_CHAN_INFO_SCALE),
349 .address = in_supply,
352 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
353 BIT(IIO_CHAN_INFO_OFFSET) |
354 BIT(IIO_CHAN_INFO_SCALE) |
355 BIT(IIO_CHAN_INFO_PEAK),
361 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
362 BIT(IIO_CHAN_INFO_OFFSET) |
363 BIT(IIO_CHAN_INFO_SCALE),
369 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
370 BIT(IIO_CHAN_INFO_OFFSET) |
371 BIT(IIO_CHAN_INFO_SCALE),
377 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
382 static struct attribute *adis16220_attributes[] = {
383 &iio_dev_attr_capture.dev_attr.attr,
384 &iio_dev_attr_capture_count.dev_attr.attr,
388 static const struct attribute_group adis16220_attribute_group = {
389 .attrs = adis16220_attributes,
392 static const struct iio_info adis16220_info = {
393 .attrs = &adis16220_attribute_group,
394 .driver_module = THIS_MODULE,
395 .read_raw = &adis16220_read_raw,
398 static const char * const adis16220_status_error_msgs[] = {
399 [ADIS16220_DIAG_STAT_VIOLATION_BIT] = "Capture period violation/interruption",
400 [ADIS16220_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
401 [ADIS16220_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
402 [ADIS16220_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
403 [ADIS16220_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
406 static const struct adis_data adis16220_data = {
409 .msc_ctrl_reg = ADIS16220_MSC_CTRL,
410 .glob_cmd_reg = ADIS16220_GLOB_CMD,
411 .diag_stat_reg = ADIS16220_DIAG_STAT,
413 .self_test_mask = ADIS16220_MSC_CTRL_SELF_TEST_EN,
414 .startup_delay = ADIS16220_STARTUP_DELAY,
416 .status_error_msgs = adis16220_status_error_msgs,
417 .status_error_mask = BIT(ADIS16220_DIAG_STAT_VIOLATION_BIT) |
418 BIT(ADIS16220_DIAG_STAT_SPI_FAIL_BIT) |
419 BIT(ADIS16220_DIAG_STAT_FLASH_UPT_BIT) |
420 BIT(ADIS16220_DIAG_STAT_POWER_HIGH_BIT) |
421 BIT(ADIS16220_DIAG_STAT_POWER_LOW_BIT),
424 static int adis16220_probe(struct spi_device *spi)
427 struct adis16220_state *st;
428 struct iio_dev *indio_dev;
430 /* setup the industrialio driver allocated elements */
431 indio_dev = iio_device_alloc(sizeof(*st));
432 if (indio_dev == NULL) {
437 st = iio_priv(indio_dev);
438 /* this is only used for removal purposes */
439 spi_set_drvdata(spi, indio_dev);
441 indio_dev->name = spi->dev.driver->name;
442 indio_dev->dev.parent = &spi->dev;
443 indio_dev->info = &adis16220_info;
444 indio_dev->modes = INDIO_DIRECT_MODE;
445 indio_dev->channels = adis16220_channels;
446 indio_dev->num_channels = ARRAY_SIZE(adis16220_channels);
448 ret = iio_device_register(indio_dev);
452 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &accel_bin);
454 goto error_unregister_dev;
456 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc1_bin);
458 goto error_rm_accel_bin;
460 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc2_bin);
462 goto error_rm_adc1_bin;
464 ret = adis_init(&st->adis, indio_dev, spi, &adis16220_data);
466 goto error_rm_adc2_bin;
467 /* Get the device into a sane initial state */
468 ret = adis_initial_startup(&st->adis);
470 goto error_rm_adc2_bin;
474 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
476 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
478 sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
479 error_unregister_dev:
480 iio_device_unregister(indio_dev);
482 iio_device_free(indio_dev);
487 static int adis16220_remove(struct spi_device *spi)
489 struct iio_dev *indio_dev = spi_get_drvdata(spi);
491 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
492 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
493 sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
494 iio_device_unregister(indio_dev);
495 iio_device_free(indio_dev);
500 static struct spi_driver adis16220_driver = {
503 .owner = THIS_MODULE,
505 .probe = adis16220_probe,
506 .remove = adis16220_remove,
508 module_spi_driver(adis16220_driver);
510 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
511 MODULE_DESCRIPTION("Analog Devices ADIS16220 Digital Vibration Sensor");
512 MODULE_LICENSE("GPL v2");
513 MODULE_ALIAS("spi:adis16220");