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_transfer xfers[] = {
123 if (unlikely(!count))
126 if ((off >= ADIS16220_CAPTURE_SIZE) || (count & 1) || (off & 1))
129 if (off + count > ADIS16220_CAPTURE_SIZE)
130 count = ADIS16220_CAPTURE_SIZE - off;
132 /* write the begin position of capture buffer */
133 ret = adis_write_reg_16(&st->adis,
139 /* read count/2 values from capture buffer */
140 mutex_lock(&st->buf_lock);
143 for (i = 0; i < count; i += 2) {
144 st->tx[i] = ADIS_READ_REG(addr);
147 xfers[1].len = count;
149 ret = spi_sync_transfer(st->adis.spi, xfers, ARRAY_SIZE(xfers));
152 mutex_unlock(&st->buf_lock);
156 memcpy(buf, st->rx, count);
158 mutex_unlock(&st->buf_lock);
162 static ssize_t adis16220_accel_bin_read(struct file *filp, struct kobject *kobj,
163 struct bin_attribute *attr,
168 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
170 return adis16220_capture_buffer_read(indio_dev, buf,
172 ADIS16220_CAPT_BUFA);
175 static struct bin_attribute accel_bin = {
180 .read = adis16220_accel_bin_read,
181 .size = ADIS16220_CAPTURE_SIZE,
184 static ssize_t adis16220_adc1_bin_read(struct file *filp, struct kobject *kobj,
185 struct bin_attribute *attr,
186 char *buf, loff_t off,
189 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
191 return adis16220_capture_buffer_read(indio_dev, buf,
193 ADIS16220_CAPT_BUF1);
196 static struct bin_attribute adc1_bin = {
201 .read = adis16220_adc1_bin_read,
202 .size = ADIS16220_CAPTURE_SIZE,
205 static ssize_t adis16220_adc2_bin_read(struct file *filp, struct kobject *kobj,
206 struct bin_attribute *attr,
207 char *buf, loff_t off,
210 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
212 return adis16220_capture_buffer_read(indio_dev, buf,
214 ADIS16220_CAPT_BUF2);
218 static struct bin_attribute adc2_bin = {
223 .read = adis16220_adc2_bin_read,
224 .size = ADIS16220_CAPTURE_SIZE,
227 #define IIO_DEV_ATTR_CAPTURE(_store) \
228 IIO_DEVICE_ATTR(capture, S_IWUSR, NULL, _store, 0)
230 static IIO_DEV_ATTR_CAPTURE(adis16220_write_capture);
232 #define IIO_DEV_ATTR_CAPTURE_COUNT(_mode, _show, _store, _addr) \
233 IIO_DEVICE_ATTR(capture_count, _mode, _show, _store, _addr)
235 static IIO_DEV_ATTR_CAPTURE_COUNT(S_IWUSR | S_IRUGO,
236 adis16220_read_16bit,
237 adis16220_write_16bit,
238 ADIS16220_CAPT_PNTR);
240 enum adis16220_channel {
241 in_supply, in_1, in_2, accel, temp
244 struct adis16220_address_spec {
250 /* Address / bits / signed */
251 static const struct adis16220_address_spec adis16220_addresses[][3] = {
252 [in_supply] = { { ADIS16220_CAPT_SUPPLY, 12, 0 }, },
253 [in_1] = { { ADIS16220_CAPT_BUF1, 16, 1 },
254 { ADIS16220_AIN1_NULL, 16, 1 },
255 { ADIS16220_CAPT_PEAK1, 16, 1 }, },
256 [in_2] = { { ADIS16220_CAPT_BUF2, 16, 1 },
257 { ADIS16220_AIN2_NULL, 16, 1 },
258 { ADIS16220_CAPT_PEAK2, 16, 1 }, },
259 [accel] = { { ADIS16220_CAPT_BUFA, 16, 1 },
260 { ADIS16220_ACCL_NULL, 16, 1 },
261 { ADIS16220_CAPT_PEAKA, 16, 1 }, },
262 [temp] = { { ADIS16220_CAPT_TEMP, 12, 0 }, }
265 static int adis16220_read_raw(struct iio_dev *indio_dev,
266 struct iio_chan_spec const *chan,
270 struct adis16220_state *st = iio_priv(indio_dev);
271 const struct adis16220_address_spec *addr;
279 case IIO_CHAN_INFO_RAW:
282 case IIO_CHAN_INFO_OFFSET:
283 if (chan->type == IIO_TEMP) {
284 *val = 25000 / -470 - 1278; /* 25 C = 1278 */
289 case IIO_CHAN_INFO_PEAK:
292 case IIO_CHAN_INFO_SCALE:
293 switch (chan->type) {
295 *val = -470; /* -0.47 C */
297 return IIO_VAL_INT_PLUS_MICRO;
299 *val2 = IIO_G_TO_M_S_2(19073); /* 19.073 g */
300 return IIO_VAL_INT_PLUS_MICRO;
302 if (chan->channel == 0) {
304 *val2 = 220700; /* 1.2207 mV */
306 /* Should really be dependent on VDD */
307 *val2 = 305180; /* 305.18 uV */
309 return IIO_VAL_INT_PLUS_MICRO;
316 addr = &adis16220_addresses[chan->address][addrind];
318 ret = adis_read_reg_16(&st->adis, addr->addr, &sval);
322 sval &= (1 << bits) - 1;
323 sval = (s16)(sval << (16 - bits)) >> (16 - bits);
327 ret = adis_read_reg_16(&st->adis, addr->addr, &uval);
331 uval &= (1 << bits) - 1;
337 static const struct iio_chan_spec adis16220_channels[] = {
342 .extend_name = "supply",
343 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
344 BIT(IIO_CHAN_INFO_SCALE),
345 .address = in_supply,
348 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
349 BIT(IIO_CHAN_INFO_OFFSET) |
350 BIT(IIO_CHAN_INFO_SCALE) |
351 BIT(IIO_CHAN_INFO_PEAK),
357 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
358 BIT(IIO_CHAN_INFO_OFFSET) |
359 BIT(IIO_CHAN_INFO_SCALE),
365 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
366 BIT(IIO_CHAN_INFO_OFFSET) |
367 BIT(IIO_CHAN_INFO_SCALE),
373 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
378 static struct attribute *adis16220_attributes[] = {
379 &iio_dev_attr_capture.dev_attr.attr,
380 &iio_dev_attr_capture_count.dev_attr.attr,
384 static const struct attribute_group adis16220_attribute_group = {
385 .attrs = adis16220_attributes,
388 static const struct iio_info adis16220_info = {
389 .attrs = &adis16220_attribute_group,
390 .driver_module = THIS_MODULE,
391 .read_raw = &adis16220_read_raw,
394 static const char * const adis16220_status_error_msgs[] = {
395 [ADIS16220_DIAG_STAT_VIOLATION_BIT] = "Capture period violation/interruption",
396 [ADIS16220_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
397 [ADIS16220_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
398 [ADIS16220_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
399 [ADIS16220_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
402 static const struct adis_data adis16220_data = {
405 .msc_ctrl_reg = ADIS16220_MSC_CTRL,
406 .glob_cmd_reg = ADIS16220_GLOB_CMD,
407 .diag_stat_reg = ADIS16220_DIAG_STAT,
409 .self_test_mask = ADIS16220_MSC_CTRL_SELF_TEST_EN,
410 .startup_delay = ADIS16220_STARTUP_DELAY,
412 .status_error_msgs = adis16220_status_error_msgs,
413 .status_error_mask = BIT(ADIS16220_DIAG_STAT_VIOLATION_BIT) |
414 BIT(ADIS16220_DIAG_STAT_SPI_FAIL_BIT) |
415 BIT(ADIS16220_DIAG_STAT_FLASH_UPT_BIT) |
416 BIT(ADIS16220_DIAG_STAT_POWER_HIGH_BIT) |
417 BIT(ADIS16220_DIAG_STAT_POWER_LOW_BIT),
420 static int adis16220_probe(struct spi_device *spi)
423 struct adis16220_state *st;
424 struct iio_dev *indio_dev;
426 /* setup the industrialio driver allocated elements */
427 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
431 st = iio_priv(indio_dev);
432 /* this is only used for removal purposes */
433 spi_set_drvdata(spi, indio_dev);
435 indio_dev->name = spi->dev.driver->name;
436 indio_dev->dev.parent = &spi->dev;
437 indio_dev->info = &adis16220_info;
438 indio_dev->modes = INDIO_DIRECT_MODE;
439 indio_dev->channels = adis16220_channels;
440 indio_dev->num_channels = ARRAY_SIZE(adis16220_channels);
442 ret = iio_device_register(indio_dev);
446 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &accel_bin);
448 goto error_unregister_dev;
450 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc1_bin);
452 goto error_rm_accel_bin;
454 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc2_bin);
456 goto error_rm_adc1_bin;
458 ret = adis_init(&st->adis, indio_dev, spi, &adis16220_data);
460 goto error_rm_adc2_bin;
461 /* Get the device into a sane initial state */
462 ret = adis_initial_startup(&st->adis);
464 goto error_rm_adc2_bin;
468 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
470 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
472 sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
473 error_unregister_dev:
474 iio_device_unregister(indio_dev);
478 static int adis16220_remove(struct spi_device *spi)
480 struct iio_dev *indio_dev = spi_get_drvdata(spi);
482 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
483 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
484 sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
485 iio_device_unregister(indio_dev);
490 static struct spi_driver adis16220_driver = {
493 .owner = THIS_MODULE,
495 .probe = adis16220_probe,
496 .remove = adis16220_remove,
498 module_spi_driver(adis16220_driver);
500 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
501 MODULE_DESCRIPTION("Analog Devices ADIS16220 Digital Vibration Sensor");
502 MODULE_LICENSE("GPL v2");
503 MODULE_ALIAS("spi:adis16220");