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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>
17
18#include <linux/iio/iio.h>
19#include <linux/iio/sysfs.h>
20
21#include "adis16220.h"
22
23static ssize_t adis16220_read_16bit(struct device *dev,
24 struct device_attribute *attr,
25 char *buf)
26{
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);
30 ssize_t ret;
31 u16 val;
32
33
34 mutex_lock(&indio_dev->mlock);
35 ret = adis_read_reg_16(&st->adis, this_attr->address, &val);
36 mutex_unlock(&indio_dev->mlock);
37 if (ret)
38 return ret;
39 return sprintf(buf, "%u\n", val);
40}
41
42static ssize_t adis16220_write_16bit(struct device *dev,
43 struct device_attribute *attr,
44 const char *buf,
45 size_t len)
46{
47 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
48 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
49 struct adis16220_state *st = iio_priv(indio_dev);
50 int ret;
51 u16 val;
52
53 ret = kstrtou16(buf, 10, &val);
54 if (ret)
55 goto error_ret;
56 ret = adis_write_reg_16(&st->adis, this_attr->address, val);
57
58error_ret:
59 return ret ? ret : len;
60}
61
62static int adis16220_capture(struct iio_dev *indio_dev)
63{
64 struct adis16220_state *st = iio_priv(indio_dev);
65 int ret;
66
67
68 ret = adis_write_reg_16(&st->adis, ADIS16220_GLOB_CMD, 0xBF08);
69 if (ret)
70 dev_err(&indio_dev->dev, "problem beginning capture");
71
72 usleep_range(10000, 11000);
73
74 return ret;
75}
76
77static ssize_t adis16220_write_capture(struct device *dev,
78 struct device_attribute *attr,
79 const char *buf, size_t len)
80{
81 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
82 bool val;
83 int ret;
84
85 ret = strtobool(buf, &val);
86 if (ret)
87 return ret;
88 if (!val)
89 return -EINVAL;
90 ret = adis16220_capture(indio_dev);
91 if (ret)
92 return ret;
93
94 return len;
95}
96
97static ssize_t adis16220_capture_buffer_read(struct iio_dev *indio_dev,
98 char *buf,
99 loff_t off,
100 size_t count,
101 int addr)
102{
103 struct adis16220_state *st = iio_priv(indio_dev);
104 struct spi_transfer xfers[] = {
105 {
106 .tx_buf = st->tx,
107 .bits_per_word = 8,
108 .len = 2,
109 .cs_change = 1,
110 .delay_usecs = 25,
111 }, {
112 .tx_buf = st->tx,
113 .rx_buf = st->rx,
114 .bits_per_word = 8,
115 .cs_change = 1,
116 .delay_usecs = 25,
117 },
118 };
119 int ret;
120 int i;
121
122 if (unlikely(!count))
123 return count;
124
125 if ((off >= ADIS16220_CAPTURE_SIZE) || (count & 1) || (off & 1))
126 return -EINVAL;
127
128 if (off + count > ADIS16220_CAPTURE_SIZE)
129 count = ADIS16220_CAPTURE_SIZE - off;
130
131
132 ret = adis_write_reg_16(&st->adis,
133 ADIS16220_CAPT_PNTR,
134 off > 1);
135 if (ret)
136 return -EIO;
137
138
139 mutex_lock(&st->buf_lock);
140
141 for (i = 0; i < count; i += 2) {
142 st->tx[i] = ADIS_READ_REG(addr);
143 st->tx[i + 1] = 0;
144 }
145 xfers[1].len = count;
146
147 ret = spi_sync_transfer(st->adis.spi, xfers, ARRAY_SIZE(xfers));
148 if (ret) {
149 mutex_unlock(&st->buf_lock);
150 return -EIO;
151 }
152
153 memcpy(buf, st->rx, count);
154
155 mutex_unlock(&st->buf_lock);
156 return count;
157}
158
159static ssize_t adis16220_accel_bin_read(struct file *filp, struct kobject *kobj,
160 struct bin_attribute *attr,
161 char *buf,
162 loff_t off,
163 size_t count)
164{
165 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
166
167 return adis16220_capture_buffer_read(indio_dev, buf,
168 off, count,
169 ADIS16220_CAPT_BUFA);
170}
171
172static struct bin_attribute accel_bin = {
173 .attr = {
174 .name = "accel_bin",
175 .mode = S_IRUGO,
176 },
177 .read = adis16220_accel_bin_read,
178 .size = ADIS16220_CAPTURE_SIZE,
179};
180
181static ssize_t adis16220_adc1_bin_read(struct file *filp, struct kobject *kobj,
182 struct bin_attribute *attr,
183 char *buf, loff_t off,
184 size_t count)
185{
186 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
187
188 return adis16220_capture_buffer_read(indio_dev, buf,
189 off, count,
190 ADIS16220_CAPT_BUF1);
191}
192
193static struct bin_attribute adc1_bin = {
194 .attr = {
195 .name = "in0_bin",
196 .mode = S_IRUGO,
197 },
198 .read = adis16220_adc1_bin_read,
199 .size = ADIS16220_CAPTURE_SIZE,
200};
201
202static ssize_t adis16220_adc2_bin_read(struct file *filp, struct kobject *kobj,
203 struct bin_attribute *attr,
204 char *buf, loff_t off,
205 size_t count)
206{
207 struct iio_dev *indio_dev = dev_to_iio_dev(kobj_to_dev(kobj));
208
209 return adis16220_capture_buffer_read(indio_dev, buf,
210 off, count,
211 ADIS16220_CAPT_BUF2);
212}
213
214static struct bin_attribute adc2_bin = {
215 .attr = {
216 .name = "in1_bin",
217 .mode = S_IRUGO,
218 },
219 .read = adis16220_adc2_bin_read,
220 .size = ADIS16220_CAPTURE_SIZE,
221};
222
223#define IIO_DEV_ATTR_CAPTURE(_store) \
224 IIO_DEVICE_ATTR(capture, S_IWUSR, NULL, _store, 0)
225
226static IIO_DEV_ATTR_CAPTURE(adis16220_write_capture);
227
228#define IIO_DEV_ATTR_CAPTURE_COUNT(_mode, _show, _store, _addr) \
229 IIO_DEVICE_ATTR(capture_count, _mode, _show, _store, _addr)
230
231static IIO_DEV_ATTR_CAPTURE_COUNT(S_IWUSR | S_IRUGO,
232 adis16220_read_16bit,
233 adis16220_write_16bit,
234 ADIS16220_CAPT_PNTR);
235
236enum adis16220_channel {
237 in_supply, in_1, in_2, accel, temp
238};
239
240struct adis16220_address_spec {
241 u8 addr;
242 u8 bits;
243 bool sign;
244};
245
246
247static const struct adis16220_address_spec adis16220_addresses[][3] = {
248 [in_supply] = { { ADIS16220_CAPT_SUPPLY, 12, 0 }, },
249 [in_1] = { { ADIS16220_CAPT_BUF1, 16, 1 },
250 { ADIS16220_AIN1_NULL, 16, 1 },
251 { ADIS16220_CAPT_PEAK1, 16, 1 }, },
252 [in_2] = { { ADIS16220_CAPT_BUF2, 16, 1 },
253 { ADIS16220_AIN2_NULL, 16, 1 },
254 { ADIS16220_CAPT_PEAK2, 16, 1 }, },
255 [accel] = { { ADIS16220_CAPT_BUFA, 16, 1 },
256 { ADIS16220_ACCL_NULL, 16, 1 },
257 { ADIS16220_CAPT_PEAKA, 16, 1 }, },
258 [temp] = { { ADIS16220_CAPT_TEMP, 12, 0 }, }
259};
260
261static int adis16220_read_raw(struct iio_dev *indio_dev,
262 struct iio_chan_spec const *chan,
263 int *val, int *val2,
264 long mask)
265{
266 struct adis16220_state *st = iio_priv(indio_dev);
267 const struct adis16220_address_spec *addr;
268 int ret = -EINVAL;
269 int addrind = 0;
270 u16 uval;
271 s16 sval;
272 u8 bits;
273
274 switch (mask) {
275 case IIO_CHAN_INFO_RAW:
276 addrind = 0;
277 break;
278 case IIO_CHAN_INFO_OFFSET:
279 if (chan->type == IIO_TEMP) {
280 *val = 25000 / -470 - 1278;
281 return IIO_VAL_INT;
282 }
283 addrind = 1;
284 break;
285 case IIO_CHAN_INFO_PEAK:
286 addrind = 2;
287 break;
288 case IIO_CHAN_INFO_SCALE:
289 switch (chan->type) {
290 case IIO_TEMP:
291 *val = -470;
292 *val2 = 0;
293 return IIO_VAL_INT_PLUS_MICRO;
294 case IIO_ACCEL:
295 *val2 = IIO_G_TO_M_S_2(19073);
296 return IIO_VAL_INT_PLUS_MICRO;
297 case IIO_VOLTAGE:
298 if (chan->channel == 0) {
299 *val = 1;
300 *val2 = 220700;
301 } else {
302
303 *val2 = 305180;
304 }
305 return IIO_VAL_INT_PLUS_MICRO;
306 default:
307 return -EINVAL;
308 }
309 default:
310 return -EINVAL;
311 }
312 addr = &adis16220_addresses[chan->address][addrind];
313 if (addr->sign) {
314 ret = adis_read_reg_16(&st->adis, addr->addr, &sval);
315 if (ret)
316 return ret;
317 bits = addr->bits;
318 sval &= (1 << bits) - 1;
319 sval = (s16)(sval << (16 - bits)) >> (16 - bits);
320 *val = sval;
321 return IIO_VAL_INT;
322 }
323 ret = adis_read_reg_16(&st->adis, addr->addr, &uval);
324 if (ret)
325 return ret;
326 bits = addr->bits;
327 uval &= (1 << bits) - 1;
328 *val = uval;
329 return IIO_VAL_INT;
330}
331
332static const struct iio_chan_spec adis16220_channels[] = {
333 {
334 .type = IIO_VOLTAGE,
335 .indexed = 1,
336 .channel = 0,
337 .extend_name = "supply",
338 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
339 BIT(IIO_CHAN_INFO_SCALE),
340 .address = in_supply,
341 }, {
342 .type = IIO_ACCEL,
343 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
344 BIT(IIO_CHAN_INFO_OFFSET) |
345 BIT(IIO_CHAN_INFO_SCALE) |
346 BIT(IIO_CHAN_INFO_PEAK),
347 .address = accel,
348 }, {
349 .type = IIO_TEMP,
350 .indexed = 1,
351 .channel = 0,
352 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
353 BIT(IIO_CHAN_INFO_OFFSET) |
354 BIT(IIO_CHAN_INFO_SCALE),
355 .address = temp,
356 }, {
357 .type = IIO_VOLTAGE,
358 .indexed = 1,
359 .channel = 1,
360 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
361 BIT(IIO_CHAN_INFO_OFFSET) |
362 BIT(IIO_CHAN_INFO_SCALE),
363 .address = in_1,
364 }, {
365 .type = IIO_VOLTAGE,
366 .indexed = 1,
367 .channel = 2,
368 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
369 .address = in_2,
370 }
371};
372
373static struct attribute *adis16220_attributes[] = {
374 &iio_dev_attr_capture.dev_attr.attr,
375 &iio_dev_attr_capture_count.dev_attr.attr,
376 NULL
377};
378
379static const struct attribute_group adis16220_attribute_group = {
380 .attrs = adis16220_attributes,
381};
382
383static const struct iio_info adis16220_info = {
384 .attrs = &adis16220_attribute_group,
385 .driver_module = THIS_MODULE,
386 .read_raw = &adis16220_read_raw,
387};
388
389static const char * const adis16220_status_error_msgs[] = {
390 [ADIS16220_DIAG_STAT_VIOLATION_BIT] = "Capture period violation/interruption",
391 [ADIS16220_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
392 [ADIS16220_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
393 [ADIS16220_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
394 [ADIS16220_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
395};
396
397static const struct adis_data adis16220_data = {
398 .read_delay = 35,
399 .write_delay = 35,
400 .msc_ctrl_reg = ADIS16220_MSC_CTRL,
401 .glob_cmd_reg = ADIS16220_GLOB_CMD,
402 .diag_stat_reg = ADIS16220_DIAG_STAT,
403
404 .self_test_mask = ADIS16220_MSC_CTRL_SELF_TEST_EN,
405 .startup_delay = ADIS16220_STARTUP_DELAY,
406
407 .status_error_msgs = adis16220_status_error_msgs,
408 .status_error_mask = BIT(ADIS16220_DIAG_STAT_VIOLATION_BIT) |
409 BIT(ADIS16220_DIAG_STAT_SPI_FAIL_BIT) |
410 BIT(ADIS16220_DIAG_STAT_FLASH_UPT_BIT) |
411 BIT(ADIS16220_DIAG_STAT_POWER_HIGH_BIT) |
412 BIT(ADIS16220_DIAG_STAT_POWER_LOW_BIT),
413};
414
415static int adis16220_probe(struct spi_device *spi)
416{
417 int ret;
418 struct adis16220_state *st;
419 struct iio_dev *indio_dev;
420
421
422 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
423 if (!indio_dev)
424 return -ENOMEM;
425
426 st = iio_priv(indio_dev);
427
428 spi_set_drvdata(spi, indio_dev);
429
430 indio_dev->name = spi->dev.driver->name;
431 indio_dev->dev.parent = &spi->dev;
432 indio_dev->info = &adis16220_info;
433 indio_dev->modes = INDIO_DIRECT_MODE;
434 indio_dev->channels = adis16220_channels;
435 indio_dev->num_channels = ARRAY_SIZE(adis16220_channels);
436
437 ret = devm_iio_device_register(&spi->dev, indio_dev);
438 if (ret)
439 return ret;
440
441 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &accel_bin);
442 if (ret)
443 return ret;
444
445 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc1_bin);
446 if (ret)
447 goto error_rm_accel_bin;
448
449 ret = sysfs_create_bin_file(&indio_dev->dev.kobj, &adc2_bin);
450 if (ret)
451 goto error_rm_adc1_bin;
452
453 ret = adis_init(&st->adis, indio_dev, spi, &adis16220_data);
454 if (ret)
455 goto error_rm_adc2_bin;
456
457 ret = adis_initial_startup(&st->adis);
458 if (ret)
459 goto error_rm_adc2_bin;
460 return 0;
461
462error_rm_adc2_bin:
463 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
464error_rm_adc1_bin:
465 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
466error_rm_accel_bin:
467 sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
468 return ret;
469}
470
471static int adis16220_remove(struct spi_device *spi)
472{
473 struct iio_dev *indio_dev = spi_get_drvdata(spi);
474
475 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc2_bin);
476 sysfs_remove_bin_file(&indio_dev->dev.kobj, &adc1_bin);
477 sysfs_remove_bin_file(&indio_dev->dev.kobj, &accel_bin);
478
479 return 0;
480}
481
482static struct spi_driver adis16220_driver = {
483 .driver = {
484 .name = "adis16220",
485 .owner = THIS_MODULE,
486 },
487 .probe = adis16220_probe,
488 .remove = adis16220_remove,
489};
490module_spi_driver(adis16220_driver);
491
492MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
493MODULE_DESCRIPTION("Analog Devices ADIS16220 Digital Vibration Sensor");
494MODULE_LICENSE("GPL v2");
495MODULE_ALIAS("spi:adis16220");
496
