2 * ADIS16480 and similar IMUs driver
4 * Copyright 2012 Analog Devices Inc.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
12 #include <linux/interrupt.h>
13 #include <linux/delay.h>
14 #include <linux/mutex.h>
15 #include <linux/device.h>
16 #include <linux/kernel.h>
17 #include <linux/spi/spi.h>
18 #include <linux/slab.h>
19 #include <linux/sysfs.h>
20 #include <linux/module.h>
22 #include <linux/iio/iio.h>
23 #include <linux/iio/sysfs.h>
24 #include <linux/iio/buffer.h>
25 #include <linux/iio/imu/adis.h>
27 #include <linux/debugfs.h>
29 #define ADIS16480_PAGE_SIZE 0x80
31 #define ADIS16480_REG(page, reg) ((page) * ADIS16480_PAGE_SIZE + (reg))
33 #define ADIS16480_REG_PAGE_ID 0x00 /* Same address on each page */
34 #define ADIS16480_REG_SEQ_CNT ADIS16480_REG(0x00, 0x06)
35 #define ADIS16480_REG_SYS_E_FLA ADIS16480_REG(0x00, 0x08)
36 #define ADIS16480_REG_DIAG_STS ADIS16480_REG(0x00, 0x0A)
37 #define ADIS16480_REG_ALM_STS ADIS16480_REG(0x00, 0x0C)
38 #define ADIS16480_REG_TEMP_OUT ADIS16480_REG(0x00, 0x0E)
39 #define ADIS16480_REG_X_GYRO_OUT ADIS16480_REG(0x00, 0x10)
40 #define ADIS16480_REG_Y_GYRO_OUT ADIS16480_REG(0x00, 0x14)
41 #define ADIS16480_REG_Z_GYRO_OUT ADIS16480_REG(0x00, 0x18)
42 #define ADIS16480_REG_X_ACCEL_OUT ADIS16480_REG(0x00, 0x1C)
43 #define ADIS16480_REG_Y_ACCEL_OUT ADIS16480_REG(0x00, 0x20)
44 #define ADIS16480_REG_Z_ACCEL_OUT ADIS16480_REG(0x00, 0x24)
45 #define ADIS16480_REG_X_MAGN_OUT ADIS16480_REG(0x00, 0x28)
46 #define ADIS16480_REG_Y_MAGN_OUT ADIS16480_REG(0x00, 0x2A)
47 #define ADIS16480_REG_Z_MAGN_OUT ADIS16480_REG(0x00, 0x2C)
48 #define ADIS16480_REG_BAROM_OUT ADIS16480_REG(0x00, 0x2E)
49 #define ADIS16480_REG_X_DELTAANG_OUT ADIS16480_REG(0x00, 0x40)
50 #define ADIS16480_REG_Y_DELTAANG_OUT ADIS16480_REG(0x00, 0x44)
51 #define ADIS16480_REG_Z_DELTAANG_OUT ADIS16480_REG(0x00, 0x48)
52 #define ADIS16480_REG_X_DELTAVEL_OUT ADIS16480_REG(0x00, 0x4C)
53 #define ADIS16480_REG_Y_DELTAVEL_OUT ADIS16480_REG(0x00, 0x50)
54 #define ADIS16480_REG_Z_DELTAVEL_OUT ADIS16480_REG(0x00, 0x54)
55 #define ADIS16480_REG_PROD_ID ADIS16480_REG(0x00, 0x7E)
57 #define ADIS16480_REG_X_GYRO_SCALE ADIS16480_REG(0x02, 0x04)
58 #define ADIS16480_REG_Y_GYRO_SCALE ADIS16480_REG(0x02, 0x06)
59 #define ADIS16480_REG_Z_GYRO_SCALE ADIS16480_REG(0x02, 0x08)
60 #define ADIS16480_REG_X_ACCEL_SCALE ADIS16480_REG(0x02, 0x0A)
61 #define ADIS16480_REG_Y_ACCEL_SCALE ADIS16480_REG(0x02, 0x0C)
62 #define ADIS16480_REG_Z_ACCEL_SCALE ADIS16480_REG(0x02, 0x0E)
63 #define ADIS16480_REG_X_GYRO_BIAS ADIS16480_REG(0x02, 0x10)
64 #define ADIS16480_REG_Y_GYRO_BIAS ADIS16480_REG(0x02, 0x14)
65 #define ADIS16480_REG_Z_GYRO_BIAS ADIS16480_REG(0x02, 0x18)
66 #define ADIS16480_REG_X_ACCEL_BIAS ADIS16480_REG(0x02, 0x1C)
67 #define ADIS16480_REG_Y_ACCEL_BIAS ADIS16480_REG(0x02, 0x20)
68 #define ADIS16480_REG_Z_ACCEL_BIAS ADIS16480_REG(0x02, 0x24)
69 #define ADIS16480_REG_X_HARD_IRON ADIS16480_REG(0x02, 0x28)
70 #define ADIS16480_REG_Y_HARD_IRON ADIS16480_REG(0x02, 0x2A)
71 #define ADIS16480_REG_Z_HARD_IRON ADIS16480_REG(0x02, 0x2C)
72 #define ADIS16480_REG_BAROM_BIAS ADIS16480_REG(0x02, 0x40)
73 #define ADIS16480_REG_FLASH_CNT ADIS16480_REG(0x02, 0x7C)
75 #define ADIS16480_REG_GLOB_CMD ADIS16480_REG(0x03, 0x02)
76 #define ADIS16480_REG_FNCTIO_CTRL ADIS16480_REG(0x03, 0x06)
77 #define ADIS16480_REG_GPIO_CTRL ADIS16480_REG(0x03, 0x08)
78 #define ADIS16480_REG_CONFIG ADIS16480_REG(0x03, 0x0A)
79 #define ADIS16480_REG_DEC_RATE ADIS16480_REG(0x03, 0x0C)
80 #define ADIS16480_REG_SLP_CNT ADIS16480_REG(0x03, 0x10)
81 #define ADIS16480_REG_FILTER_BNK0 ADIS16480_REG(0x03, 0x16)
82 #define ADIS16480_REG_FILTER_BNK1 ADIS16480_REG(0x03, 0x18)
83 #define ADIS16480_REG_ALM_CNFG0 ADIS16480_REG(0x03, 0x20)
84 #define ADIS16480_REG_ALM_CNFG1 ADIS16480_REG(0x03, 0x22)
85 #define ADIS16480_REG_ALM_CNFG2 ADIS16480_REG(0x03, 0x24)
86 #define ADIS16480_REG_XG_ALM_MAGN ADIS16480_REG(0x03, 0x28)
87 #define ADIS16480_REG_YG_ALM_MAGN ADIS16480_REG(0x03, 0x2A)
88 #define ADIS16480_REG_ZG_ALM_MAGN ADIS16480_REG(0x03, 0x2C)
89 #define ADIS16480_REG_XA_ALM_MAGN ADIS16480_REG(0x03, 0x2E)
90 #define ADIS16480_REG_YA_ALM_MAGN ADIS16480_REG(0x03, 0x30)
91 #define ADIS16480_REG_ZA_ALM_MAGN ADIS16480_REG(0x03, 0x32)
92 #define ADIS16480_REG_XM_ALM_MAGN ADIS16480_REG(0x03, 0x34)
93 #define ADIS16480_REG_YM_ALM_MAGN ADIS16480_REG(0x03, 0x36)
94 #define ADIS16480_REG_ZM_ALM_MAGN ADIS16480_REG(0x03, 0x38)
95 #define ADIS16480_REG_BR_ALM_MAGN ADIS16480_REG(0x03, 0x3A)
96 #define ADIS16480_REG_FIRM_REV ADIS16480_REG(0x03, 0x78)
97 #define ADIS16480_REG_FIRM_DM ADIS16480_REG(0x03, 0x7A)
98 #define ADIS16480_REG_FIRM_Y ADIS16480_REG(0x03, 0x7C)
100 #define ADIS16480_REG_SERIAL_NUM ADIS16480_REG(0x04, 0x20)
102 /* Each filter coefficent bank spans two pages */
103 #define ADIS16480_FIR_COEF(page) (x < 60 ? ADIS16480_REG(page, (x) + 8) : \
104 ADIS16480_REG((page) + 1, (x) - 60 + 8))
105 #define ADIS16480_FIR_COEF_A(x) ADIS16480_FIR_COEF(0x05, (x))
106 #define ADIS16480_FIR_COEF_B(x) ADIS16480_FIR_COEF(0x07, (x))
107 #define ADIS16480_FIR_COEF_C(x) ADIS16480_FIR_COEF(0x09, (x))
108 #define ADIS16480_FIR_COEF_D(x) ADIS16480_FIR_COEF(0x0B, (x))
110 struct adis16480_chip_info {
111 unsigned int num_channels;
112 const struct iio_chan_spec *channels;
113 unsigned int gyro_max_val;
114 unsigned int gyro_max_scale;
115 unsigned int accel_max_val;
116 unsigned int accel_max_scale;
120 const struct adis16480_chip_info *chip_info;
125 #ifdef CONFIG_DEBUG_FS
127 static ssize_t adis16480_show_firmware_revision(struct file *file,
128 char __user *userbuf, size_t count, loff_t *ppos)
130 struct adis16480 *adis16480 = file->private_data;
136 ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_REV, &rev);
140 len = scnprintf(buf, sizeof(buf), "%x.%x\n", rev >> 8, rev & 0xff);
142 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
145 static const struct file_operations adis16480_firmware_revision_fops = {
147 .read = adis16480_show_firmware_revision,
148 .llseek = default_llseek,
149 .owner = THIS_MODULE,
152 static ssize_t adis16480_show_firmware_date(struct file *file,
153 char __user *userbuf, size_t count, loff_t *ppos)
155 struct adis16480 *adis16480 = file->private_data;
161 ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_Y, &year);
165 ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_FIRM_DM, &md);
169 len = snprintf(buf, sizeof(buf), "%.2x-%.2x-%.4x\n",
170 md >> 8, md & 0xff, year);
172 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
175 static const struct file_operations adis16480_firmware_date_fops = {
177 .read = adis16480_show_firmware_date,
178 .llseek = default_llseek,
179 .owner = THIS_MODULE,
182 static int adis16480_show_serial_number(void *arg, u64 *val)
184 struct adis16480 *adis16480 = arg;
188 ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_SERIAL_NUM,
197 DEFINE_SIMPLE_ATTRIBUTE(adis16480_serial_number_fops,
198 adis16480_show_serial_number, NULL, "0x%.4llx\n");
200 static int adis16480_show_product_id(void *arg, u64 *val)
202 struct adis16480 *adis16480 = arg;
206 ret = adis_read_reg_16(&adis16480->adis, ADIS16480_REG_PROD_ID,
215 DEFINE_SIMPLE_ATTRIBUTE(adis16480_product_id_fops,
216 adis16480_show_product_id, NULL, "%llu\n");
218 static int adis16480_show_flash_count(void *arg, u64 *val)
220 struct adis16480 *adis16480 = arg;
224 ret = adis_read_reg_32(&adis16480->adis, ADIS16480_REG_FLASH_CNT,
233 DEFINE_SIMPLE_ATTRIBUTE(adis16480_flash_count_fops,
234 adis16480_show_flash_count, NULL, "%lld\n");
236 static int adis16480_debugfs_init(struct iio_dev *indio_dev)
238 struct adis16480 *adis16480 = iio_priv(indio_dev);
240 debugfs_create_file("firmware_revision", 0400,
241 indio_dev->debugfs_dentry, adis16480,
242 &adis16480_firmware_revision_fops);
243 debugfs_create_file("firmware_date", 0400, indio_dev->debugfs_dentry,
244 adis16480, &adis16480_firmware_date_fops);
245 debugfs_create_file("serial_number", 0400, indio_dev->debugfs_dentry,
246 adis16480, &adis16480_serial_number_fops);
247 debugfs_create_file("product_id", 0400, indio_dev->debugfs_dentry,
248 adis16480, &adis16480_product_id_fops);
249 debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry,
250 adis16480, &adis16480_flash_count_fops);
257 static int adis16480_debugfs_init(struct iio_dev *indio_dev)
264 static int adis16480_set_freq(struct iio_dev *indio_dev, int val, int val2)
266 struct adis16480 *st = iio_priv(indio_dev);
269 t = val * 1000 + val2 / 1000;
280 return adis_write_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, t);
283 static int adis16480_get_freq(struct iio_dev *indio_dev, int *val, int *val2)
285 struct adis16480 *st = iio_priv(indio_dev);
290 ret = adis_read_reg_16(&st->adis, ADIS16480_REG_DEC_RATE, &t);
294 freq = 2460000 / (t + 1);
296 *val2 = (freq % 1000) * 1000;
298 return IIO_VAL_INT_PLUS_MICRO;
302 ADIS16480_SCAN_GYRO_X,
303 ADIS16480_SCAN_GYRO_Y,
304 ADIS16480_SCAN_GYRO_Z,
305 ADIS16480_SCAN_ACCEL_X,
306 ADIS16480_SCAN_ACCEL_Y,
307 ADIS16480_SCAN_ACCEL_Z,
308 ADIS16480_SCAN_MAGN_X,
309 ADIS16480_SCAN_MAGN_Y,
310 ADIS16480_SCAN_MAGN_Z,
315 static const unsigned int adis16480_calibbias_regs[] = {
316 [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_BIAS,
317 [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_BIAS,
318 [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_BIAS,
319 [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_BIAS,
320 [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_BIAS,
321 [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_BIAS,
322 [ADIS16480_SCAN_MAGN_X] = ADIS16480_REG_X_HARD_IRON,
323 [ADIS16480_SCAN_MAGN_Y] = ADIS16480_REG_Y_HARD_IRON,
324 [ADIS16480_SCAN_MAGN_Z] = ADIS16480_REG_Z_HARD_IRON,
325 [ADIS16480_SCAN_BARO] = ADIS16480_REG_BAROM_BIAS,
328 static const unsigned int adis16480_calibscale_regs[] = {
329 [ADIS16480_SCAN_GYRO_X] = ADIS16480_REG_X_GYRO_SCALE,
330 [ADIS16480_SCAN_GYRO_Y] = ADIS16480_REG_Y_GYRO_SCALE,
331 [ADIS16480_SCAN_GYRO_Z] = ADIS16480_REG_Z_GYRO_SCALE,
332 [ADIS16480_SCAN_ACCEL_X] = ADIS16480_REG_X_ACCEL_SCALE,
333 [ADIS16480_SCAN_ACCEL_Y] = ADIS16480_REG_Y_ACCEL_SCALE,
334 [ADIS16480_SCAN_ACCEL_Z] = ADIS16480_REG_Z_ACCEL_SCALE,
337 static int adis16480_set_calibbias(struct iio_dev *indio_dev,
338 const struct iio_chan_spec *chan, int bias)
340 unsigned int reg = adis16480_calibbias_regs[chan->scan_index];
341 struct adis16480 *st = iio_priv(indio_dev);
343 switch (chan->type) {
346 if (bias < -0x8000 || bias >= 0x8000)
348 return adis_write_reg_16(&st->adis, reg, bias);
351 return adis_write_reg_32(&st->adis, reg, bias);
359 static int adis16480_get_calibbias(struct iio_dev *indio_dev,
360 const struct iio_chan_spec *chan, int *bias)
362 unsigned int reg = adis16480_calibbias_regs[chan->scan_index];
363 struct adis16480 *st = iio_priv(indio_dev);
368 switch (chan->type) {
371 ret = adis_read_reg_16(&st->adis, reg, &val16);
372 *bias = sign_extend32(val16, 15);
376 ret = adis_read_reg_32(&st->adis, reg, &val32);
377 *bias = sign_extend32(val32, 31);
389 static int adis16480_set_calibscale(struct iio_dev *indio_dev,
390 const struct iio_chan_spec *chan, int scale)
392 unsigned int reg = adis16480_calibscale_regs[chan->scan_index];
393 struct adis16480 *st = iio_priv(indio_dev);
395 if (scale < -0x8000 || scale >= 0x8000)
398 return adis_write_reg_16(&st->adis, reg, scale);
401 static int adis16480_get_calibscale(struct iio_dev *indio_dev,
402 const struct iio_chan_spec *chan, int *scale)
404 unsigned int reg = adis16480_calibscale_regs[chan->scan_index];
405 struct adis16480 *st = iio_priv(indio_dev);
409 ret = adis_read_reg_16(&st->adis, reg, &val16);
413 *scale = sign_extend32(val16, 15);
417 static const unsigned int adis16480_def_filter_freqs[] = {
424 static const unsigned int ad16480_filter_data[][2] = {
425 [ADIS16480_SCAN_GYRO_X] = { ADIS16480_REG_FILTER_BNK0, 0 },
426 [ADIS16480_SCAN_GYRO_Y] = { ADIS16480_REG_FILTER_BNK0, 3 },
427 [ADIS16480_SCAN_GYRO_Z] = { ADIS16480_REG_FILTER_BNK0, 6 },
428 [ADIS16480_SCAN_ACCEL_X] = { ADIS16480_REG_FILTER_BNK0, 9 },
429 [ADIS16480_SCAN_ACCEL_Y] = { ADIS16480_REG_FILTER_BNK0, 12 },
430 [ADIS16480_SCAN_ACCEL_Z] = { ADIS16480_REG_FILTER_BNK1, 0 },
431 [ADIS16480_SCAN_MAGN_X] = { ADIS16480_REG_FILTER_BNK1, 3 },
432 [ADIS16480_SCAN_MAGN_Y] = { ADIS16480_REG_FILTER_BNK1, 6 },
433 [ADIS16480_SCAN_MAGN_Z] = { ADIS16480_REG_FILTER_BNK1, 9 },
436 static int adis16480_get_filter_freq(struct iio_dev *indio_dev,
437 const struct iio_chan_spec *chan, int *freq)
439 struct adis16480 *st = iio_priv(indio_dev);
440 unsigned int enable_mask, offset, reg;
444 reg = ad16480_filter_data[chan->scan_index][0];
445 offset = ad16480_filter_data[chan->scan_index][1];
446 enable_mask = BIT(offset + 2);
448 ret = adis_read_reg_16(&st->adis, reg, &val);
452 if (!(val & enable_mask))
455 *freq = adis16480_def_filter_freqs[(val >> offset) & 0x3];
460 static int adis16480_set_filter_freq(struct iio_dev *indio_dev,
461 const struct iio_chan_spec *chan, unsigned int freq)
463 struct adis16480 *st = iio_priv(indio_dev);
464 unsigned int enable_mask, offset, reg;
465 unsigned int diff, best_diff;
466 unsigned int i, best_freq;
470 reg = ad16480_filter_data[chan->scan_index][0];
471 offset = ad16480_filter_data[chan->scan_index][1];
472 enable_mask = BIT(offset + 2);
474 ret = adis_read_reg_16(&st->adis, reg, &val);
483 for (i = 0; i < ARRAY_SIZE(adis16480_def_filter_freqs); i++) {
484 if (adis16480_def_filter_freqs[i] >= freq) {
485 diff = adis16480_def_filter_freqs[i] - freq;
486 if (diff < best_diff) {
493 val &= ~(0x3 << offset);
494 val |= best_freq << offset;
498 return adis_write_reg_16(&st->adis, reg, val);
501 static int adis16480_read_raw(struct iio_dev *indio_dev,
502 const struct iio_chan_spec *chan, int *val, int *val2, long info)
504 struct adis16480 *st = iio_priv(indio_dev);
507 case IIO_CHAN_INFO_RAW:
508 return adis_single_conversion(indio_dev, chan, 0, val);
509 case IIO_CHAN_INFO_SCALE:
510 switch (chan->type) {
512 *val = st->chip_info->gyro_max_scale;
513 *val2 = st->chip_info->gyro_max_val;
514 return IIO_VAL_FRACTIONAL;
516 *val = st->chip_info->accel_max_scale;
517 *val2 = st->chip_info->accel_max_val;
518 return IIO_VAL_FRACTIONAL;
521 *val2 = 100; /* 0.0001 gauss */
522 return IIO_VAL_INT_PLUS_MICRO;
525 *val2 = 650000; /* 5.65 milli degree Celsius */
526 return IIO_VAL_INT_PLUS_MICRO;
529 *val2 = 4000; /* 40ubar = 0.004 kPa */
530 return IIO_VAL_INT_PLUS_MICRO;
534 case IIO_CHAN_INFO_OFFSET:
535 /* Only the temperature channel has a offset */
536 *val = 4425; /* 25 degree Celsius = 0x0000 */
538 case IIO_CHAN_INFO_CALIBBIAS:
539 return adis16480_get_calibbias(indio_dev, chan, val);
540 case IIO_CHAN_INFO_CALIBSCALE:
541 return adis16480_get_calibscale(indio_dev, chan, val);
542 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
543 return adis16480_get_filter_freq(indio_dev, chan, val);
544 case IIO_CHAN_INFO_SAMP_FREQ:
545 return adis16480_get_freq(indio_dev, val, val2);
551 static int adis16480_write_raw(struct iio_dev *indio_dev,
552 const struct iio_chan_spec *chan, int val, int val2, long info)
555 case IIO_CHAN_INFO_CALIBBIAS:
556 return adis16480_set_calibbias(indio_dev, chan, val);
557 case IIO_CHAN_INFO_CALIBSCALE:
558 return adis16480_set_calibscale(indio_dev, chan, val);
559 case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
560 return adis16480_set_filter_freq(indio_dev, chan, val);
561 case IIO_CHAN_INFO_SAMP_FREQ:
562 return adis16480_set_freq(indio_dev, val, val2);
569 #define ADIS16480_MOD_CHANNEL(_type, _mod, _address, _si, _info_sep, _bits) \
573 .channel2 = (_mod), \
574 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
575 BIT(IIO_CHAN_INFO_CALIBBIAS) | \
577 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
578 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
579 .address = (_address), \
580 .scan_index = (_si), \
583 .realbits = (_bits), \
584 .storagebits = (_bits), \
585 .endianness = IIO_BE, \
589 #define ADIS16480_GYRO_CHANNEL(_mod) \
590 ADIS16480_MOD_CHANNEL(IIO_ANGL_VEL, IIO_MOD_ ## _mod, \
591 ADIS16480_REG_ ## _mod ## _GYRO_OUT, ADIS16480_SCAN_GYRO_ ## _mod, \
592 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
593 BIT(IIO_CHAN_INFO_CALIBSCALE), \
596 #define ADIS16480_ACCEL_CHANNEL(_mod) \
597 ADIS16480_MOD_CHANNEL(IIO_ACCEL, IIO_MOD_ ## _mod, \
598 ADIS16480_REG_ ## _mod ## _ACCEL_OUT, ADIS16480_SCAN_ACCEL_ ## _mod, \
599 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
600 BIT(IIO_CHAN_INFO_CALIBSCALE), \
603 #define ADIS16480_MAGN_CHANNEL(_mod) \
604 ADIS16480_MOD_CHANNEL(IIO_MAGN, IIO_MOD_ ## _mod, \
605 ADIS16480_REG_ ## _mod ## _MAGN_OUT, ADIS16480_SCAN_MAGN_ ## _mod, \
606 BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \
609 #define ADIS16480_PRESSURE_CHANNEL() \
611 .type = IIO_PRESSURE, \
614 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
615 BIT(IIO_CHAN_INFO_CALIBBIAS) | \
616 BIT(IIO_CHAN_INFO_SCALE), \
617 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
618 .address = ADIS16480_REG_BAROM_OUT, \
619 .scan_index = ADIS16480_SCAN_BARO, \
624 .endianness = IIO_BE, \
628 #define ADIS16480_TEMP_CHANNEL() { \
632 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
633 BIT(IIO_CHAN_INFO_SCALE) | \
634 BIT(IIO_CHAN_INFO_OFFSET), \
635 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
636 .address = ADIS16480_REG_TEMP_OUT, \
637 .scan_index = ADIS16480_SCAN_TEMP, \
642 .endianness = IIO_BE, \
646 static const struct iio_chan_spec adis16480_channels[] = {
647 ADIS16480_GYRO_CHANNEL(X),
648 ADIS16480_GYRO_CHANNEL(Y),
649 ADIS16480_GYRO_CHANNEL(Z),
650 ADIS16480_ACCEL_CHANNEL(X),
651 ADIS16480_ACCEL_CHANNEL(Y),
652 ADIS16480_ACCEL_CHANNEL(Z),
653 ADIS16480_MAGN_CHANNEL(X),
654 ADIS16480_MAGN_CHANNEL(Y),
655 ADIS16480_MAGN_CHANNEL(Z),
656 ADIS16480_PRESSURE_CHANNEL(),
657 ADIS16480_TEMP_CHANNEL(),
658 IIO_CHAN_SOFT_TIMESTAMP(11)
661 static const struct iio_chan_spec adis16485_channels[] = {
662 ADIS16480_GYRO_CHANNEL(X),
663 ADIS16480_GYRO_CHANNEL(Y),
664 ADIS16480_GYRO_CHANNEL(Z),
665 ADIS16480_ACCEL_CHANNEL(X),
666 ADIS16480_ACCEL_CHANNEL(Y),
667 ADIS16480_ACCEL_CHANNEL(Z),
668 ADIS16480_TEMP_CHANNEL(),
669 IIO_CHAN_SOFT_TIMESTAMP(7)
672 enum adis16480_variant {
679 static const struct adis16480_chip_info adis16480_chip_info[] = {
681 .channels = adis16485_channels,
682 .num_channels = ARRAY_SIZE(adis16485_channels),
684 * storing the value in rad/degree and the scale in degree
685 * gives us the result in rad and better precession than
686 * storing the scale directly in rad.
688 .gyro_max_val = IIO_RAD_TO_DEGREE(22887),
689 .gyro_max_scale = 300,
690 .accel_max_val = IIO_M_S_2_TO_G(21973),
691 .accel_max_scale = 18,
694 .channels = adis16480_channels,
695 .num_channels = ARRAY_SIZE(adis16480_channels),
696 .gyro_max_val = IIO_RAD_TO_DEGREE(22500),
697 .gyro_max_scale = 450,
698 .accel_max_val = IIO_M_S_2_TO_G(12500),
699 .accel_max_scale = 5,
702 .channels = adis16485_channels,
703 .num_channels = ARRAY_SIZE(adis16485_channels),
704 .gyro_max_val = IIO_RAD_TO_DEGREE(22500),
705 .gyro_max_scale = 450,
706 .accel_max_val = IIO_M_S_2_TO_G(20000),
707 .accel_max_scale = 5,
710 .channels = adis16480_channels,
711 .num_channels = ARRAY_SIZE(adis16480_channels),
712 .gyro_max_val = IIO_RAD_TO_DEGREE(22500),
713 .gyro_max_scale = 450,
714 .accel_max_val = IIO_M_S_2_TO_G(22500),
715 .accel_max_scale = 18,
719 static const struct iio_info adis16480_info = {
720 .read_raw = &adis16480_read_raw,
721 .write_raw = &adis16480_write_raw,
722 .update_scan_mode = adis_update_scan_mode,
723 .driver_module = THIS_MODULE,
726 static int adis16480_stop_device(struct iio_dev *indio_dev)
728 struct adis16480 *st = iio_priv(indio_dev);
731 ret = adis_write_reg_16(&st->adis, ADIS16480_REG_SLP_CNT, BIT(9));
733 dev_err(&indio_dev->dev,
734 "Could not power down device: %d\n", ret);
739 static int adis16480_enable_irq(struct adis *adis, bool enable)
741 return adis_write_reg_16(adis, ADIS16480_REG_FNCTIO_CTRL,
742 enable ? BIT(3) : 0);
745 static int adis16480_initial_setup(struct iio_dev *indio_dev)
747 struct adis16480 *st = iio_priv(indio_dev);
749 unsigned int device_id;
752 adis_reset(&st->adis);
755 ret = adis_write_reg_16(&st->adis, ADIS16480_REG_GLOB_CMD, BIT(1));
760 ret = adis_check_status(&st->adis);
764 ret = adis_read_reg_16(&st->adis, ADIS16480_REG_PROD_ID, &prod_id);
768 ret = sscanf(indio_dev->name, "adis%u\n", &device_id);
772 if (prod_id != device_id)
773 dev_warn(&indio_dev->dev, "Device ID(%u) and product ID(%u) do not match.",
779 #define ADIS16480_DIAG_STAT_XGYRO_FAIL 0
780 #define ADIS16480_DIAG_STAT_YGYRO_FAIL 1
781 #define ADIS16480_DIAG_STAT_ZGYRO_FAIL 2
782 #define ADIS16480_DIAG_STAT_XACCL_FAIL 3
783 #define ADIS16480_DIAG_STAT_YACCL_FAIL 4
784 #define ADIS16480_DIAG_STAT_ZACCL_FAIL 5
785 #define ADIS16480_DIAG_STAT_XMAGN_FAIL 8
786 #define ADIS16480_DIAG_STAT_YMAGN_FAIL 9
787 #define ADIS16480_DIAG_STAT_ZMAGN_FAIL 10
788 #define ADIS16480_DIAG_STAT_BARO_FAIL 11
790 static const char * const adis16480_status_error_msgs[] = {
791 [ADIS16480_DIAG_STAT_XGYRO_FAIL] = "X-axis gyroscope self-test failure",
792 [ADIS16480_DIAG_STAT_YGYRO_FAIL] = "Y-axis gyroscope self-test failure",
793 [ADIS16480_DIAG_STAT_ZGYRO_FAIL] = "Z-axis gyroscope self-test failure",
794 [ADIS16480_DIAG_STAT_XACCL_FAIL] = "X-axis accelerometer self-test failure",
795 [ADIS16480_DIAG_STAT_YACCL_FAIL] = "Y-axis accelerometer self-test failure",
796 [ADIS16480_DIAG_STAT_ZACCL_FAIL] = "Z-axis accelerometer self-test failure",
797 [ADIS16480_DIAG_STAT_XMAGN_FAIL] = "X-axis magnetometer self-test failure",
798 [ADIS16480_DIAG_STAT_YMAGN_FAIL] = "Y-axis magnetometer self-test failure",
799 [ADIS16480_DIAG_STAT_ZMAGN_FAIL] = "Z-axis magnetometer self-test failure",
800 [ADIS16480_DIAG_STAT_BARO_FAIL] = "Barometer self-test failure",
803 static const struct adis_data adis16480_data = {
804 .diag_stat_reg = ADIS16480_REG_DIAG_STS,
805 .glob_cmd_reg = ADIS16480_REG_GLOB_CMD,
811 .status_error_msgs = adis16480_status_error_msgs,
812 .status_error_mask = BIT(ADIS16480_DIAG_STAT_XGYRO_FAIL) |
813 BIT(ADIS16480_DIAG_STAT_YGYRO_FAIL) |
814 BIT(ADIS16480_DIAG_STAT_ZGYRO_FAIL) |
815 BIT(ADIS16480_DIAG_STAT_XACCL_FAIL) |
816 BIT(ADIS16480_DIAG_STAT_YACCL_FAIL) |
817 BIT(ADIS16480_DIAG_STAT_ZACCL_FAIL) |
818 BIT(ADIS16480_DIAG_STAT_XMAGN_FAIL) |
819 BIT(ADIS16480_DIAG_STAT_YMAGN_FAIL) |
820 BIT(ADIS16480_DIAG_STAT_ZMAGN_FAIL) |
821 BIT(ADIS16480_DIAG_STAT_BARO_FAIL),
823 .enable_irq = adis16480_enable_irq,
826 static int adis16480_probe(struct spi_device *spi)
828 const struct spi_device_id *id = spi_get_device_id(spi);
829 struct iio_dev *indio_dev;
830 struct adis16480 *st;
833 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
834 if (indio_dev == NULL)
837 spi_set_drvdata(spi, indio_dev);
839 st = iio_priv(indio_dev);
841 st->chip_info = &adis16480_chip_info[id->driver_data];
842 indio_dev->dev.parent = &spi->dev;
843 indio_dev->name = spi_get_device_id(spi)->name;
844 indio_dev->channels = st->chip_info->channels;
845 indio_dev->num_channels = st->chip_info->num_channels;
846 indio_dev->info = &adis16480_info;
847 indio_dev->modes = INDIO_DIRECT_MODE;
849 ret = adis_init(&st->adis, indio_dev, spi, &adis16480_data);
853 ret = adis_setup_buffer_and_trigger(&st->adis, indio_dev, NULL);
857 ret = adis16480_initial_setup(indio_dev);
859 goto error_cleanup_buffer;
861 ret = iio_device_register(indio_dev);
863 goto error_stop_device;
865 adis16480_debugfs_init(indio_dev);
870 adis16480_stop_device(indio_dev);
871 error_cleanup_buffer:
872 adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
876 static int adis16480_remove(struct spi_device *spi)
878 struct iio_dev *indio_dev = spi_get_drvdata(spi);
879 struct adis16480 *st = iio_priv(indio_dev);
881 iio_device_unregister(indio_dev);
882 adis16480_stop_device(indio_dev);
884 adis_cleanup_buffer_and_trigger(&st->adis, indio_dev);
889 static const struct spi_device_id adis16480_ids[] = {
890 { "adis16375", ADIS16375 },
891 { "adis16480", ADIS16480 },
892 { "adis16485", ADIS16485 },
893 { "adis16488", ADIS16488 },
896 MODULE_DEVICE_TABLE(spi, adis16480_ids);
898 static struct spi_driver adis16480_driver = {
902 .id_table = adis16480_ids,
903 .probe = adis16480_probe,
904 .remove = adis16480_remove,
906 module_spi_driver(adis16480_driver);
908 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
909 MODULE_DESCRIPTION("Analog Devices ADIS16480 IMU driver");
910 MODULE_LICENSE("GPL v2");