1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * ADIS16260/ADIS16265 Programmable Digital Gyroscope Sensor Driver
5 * Copyright 2010 Analog Devices Inc.
8 #include <linux/interrupt.h>
9 #include <linux/mutex.h>
10 #include <linux/device.h>
11 #include <linux/kernel.h>
12 #include <linux/spi/spi.h>
13 #include <linux/sysfs.h>
14 #include <linux/module.h>
16 #include <linux/iio/iio.h>
17 #include <linux/iio/sysfs.h>
18 #include <linux/iio/buffer.h>
19 #include <linux/iio/imu/adis.h>
21 #define ADIS16260_STARTUP_DELAY 220 /* ms */
23 #define ADIS16260_FLASH_CNT 0x00 /* Flash memory write count */
24 #define ADIS16260_SUPPLY_OUT 0x02 /* Power supply measurement */
25 #define ADIS16260_GYRO_OUT 0x04 /* X-axis gyroscope output */
26 #define ADIS16260_AUX_ADC 0x0A /* analog input channel measurement */
27 #define ADIS16260_TEMP_OUT 0x0C /* internal temperature measurement */
28 #define ADIS16260_ANGL_OUT 0x0E /* angle displacement */
29 #define ADIS16260_GYRO_OFF 0x14 /* Calibration, offset/bias adjustment */
30 #define ADIS16260_GYRO_SCALE 0x16 /* Calibration, scale adjustment */
31 #define ADIS16260_ALM_MAG1 0x20 /* Alarm 1 magnitude/polarity setting */
32 #define ADIS16260_ALM_MAG2 0x22 /* Alarm 2 magnitude/polarity setting */
33 #define ADIS16260_ALM_SMPL1 0x24 /* Alarm 1 dynamic rate of change setting */
34 #define ADIS16260_ALM_SMPL2 0x26 /* Alarm 2 dynamic rate of change setting */
35 #define ADIS16260_ALM_CTRL 0x28 /* Alarm control */
36 #define ADIS16260_AUX_DAC 0x30 /* Auxiliary DAC data */
37 #define ADIS16260_GPIO_CTRL 0x32 /* Control, digital I/O line */
38 #define ADIS16260_MSC_CTRL 0x34 /* Control, data ready, self-test settings */
39 #define ADIS16260_SMPL_PRD 0x36 /* Control, internal sample rate */
40 #define ADIS16260_SENS_AVG 0x38 /* Control, dynamic range, filtering */
41 #define ADIS16260_SLP_CNT 0x3A /* Control, sleep mode initiation */
42 #define ADIS16260_DIAG_STAT 0x3C /* Diagnostic, error flags */
43 #define ADIS16260_GLOB_CMD 0x3E /* Control, global commands */
44 #define ADIS16260_LOT_ID1 0x52 /* Lot Identification Code 1 */
45 #define ADIS16260_LOT_ID2 0x54 /* Lot Identification Code 2 */
46 #define ADIS16260_PROD_ID 0x56 /* Product identifier;
47 * convert to decimal = 16,265/16,260 */
48 #define ADIS16260_SERIAL_NUM 0x58 /* Serial number */
50 #define ADIS16260_ERROR_ACTIVE (1<<14)
51 #define ADIS16260_NEW_DATA (1<<15)
54 #define ADIS16260_MSC_CTRL_MEM_TEST (1<<11)
55 /* Internal self-test enable */
56 #define ADIS16260_MSC_CTRL_INT_SELF_TEST (1<<10)
57 #define ADIS16260_MSC_CTRL_NEG_SELF_TEST (1<<9)
58 #define ADIS16260_MSC_CTRL_POS_SELF_TEST (1<<8)
59 #define ADIS16260_MSC_CTRL_DATA_RDY_EN (1<<2)
60 #define ADIS16260_MSC_CTRL_DATA_RDY_POL_HIGH (1<<1)
61 #define ADIS16260_MSC_CTRL_DATA_RDY_DIO2 (1<<0)
64 /* Time base (tB): 0 = 1.953 ms, 1 = 60.54 ms */
65 #define ADIS16260_SMPL_PRD_TIME_BASE (1<<7)
66 #define ADIS16260_SMPL_PRD_DIV_MASK 0x7F
69 #define ADIS16260_SLP_CNT_POWER_OFF 0x80
72 #define ADIS16260_DIAG_STAT_ALARM2 (1<<9)
73 #define ADIS16260_DIAG_STAT_ALARM1 (1<<8)
74 #define ADIS16260_DIAG_STAT_FLASH_CHK_BIT 6
75 #define ADIS16260_DIAG_STAT_SELF_TEST_BIT 5
76 #define ADIS16260_DIAG_STAT_OVERFLOW_BIT 4
77 #define ADIS16260_DIAG_STAT_SPI_FAIL_BIT 3
78 #define ADIS16260_DIAG_STAT_FLASH_UPT_BIT 2
79 #define ADIS16260_DIAG_STAT_POWER_HIGH_BIT 1
80 #define ADIS16260_DIAG_STAT_POWER_LOW_BIT 0
83 #define ADIS16260_GLOB_CMD_SW_RESET (1<<7)
84 #define ADIS16260_GLOB_CMD_FLASH_UPD (1<<3)
85 #define ADIS16260_GLOB_CMD_DAC_LATCH (1<<2)
86 #define ADIS16260_GLOB_CMD_FAC_CALIB (1<<1)
87 #define ADIS16260_GLOB_CMD_AUTO_NULL (1<<0)
89 #define ADIS16260_SPI_SLOW (u32)(300 * 1000)
90 #define ADIS16260_SPI_BURST (u32)(1000 * 1000)
91 #define ADIS16260_SPI_FAST (u32)(2000 * 1000)
93 /* At the moment triggers are only used for ring buffer
94 * filling. This may change!
97 #define ADIS16260_SCAN_GYRO 0
98 #define ADIS16260_SCAN_SUPPLY 1
99 #define ADIS16260_SCAN_AUX_ADC 2
100 #define ADIS16260_SCAN_TEMP 3
101 #define ADIS16260_SCAN_ANGL 4
103 struct adis16260_chip_info {
104 unsigned int gyro_max_val;
105 unsigned int gyro_max_scale;
106 const struct iio_chan_spec *channels;
107 unsigned int num_channels;
111 const struct adis16260_chip_info *info;
116 enum adis16260_type {
122 static const struct iio_chan_spec adis16260_channels[] = {
123 ADIS_GYRO_CHAN(X, ADIS16260_GYRO_OUT, ADIS16260_SCAN_GYRO,
124 BIT(IIO_CHAN_INFO_CALIBBIAS) |
125 BIT(IIO_CHAN_INFO_CALIBSCALE),
126 BIT(IIO_CHAN_INFO_SAMP_FREQ), 14),
127 ADIS_INCLI_CHAN(X, ADIS16260_ANGL_OUT, ADIS16260_SCAN_ANGL, 0,
128 BIT(IIO_CHAN_INFO_SAMP_FREQ), 14),
129 ADIS_TEMP_CHAN(ADIS16260_TEMP_OUT, ADIS16260_SCAN_TEMP,
130 BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
131 ADIS_SUPPLY_CHAN(ADIS16260_SUPPLY_OUT, ADIS16260_SCAN_SUPPLY,
132 BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
133 ADIS_AUX_ADC_CHAN(ADIS16260_AUX_ADC, ADIS16260_SCAN_AUX_ADC,
134 BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
135 IIO_CHAN_SOFT_TIMESTAMP(5),
138 static const struct iio_chan_spec adis16266_channels[] = {
139 ADIS_GYRO_CHAN(X, ADIS16260_GYRO_OUT, ADIS16260_SCAN_GYRO,
140 BIT(IIO_CHAN_INFO_CALIBBIAS) |
141 BIT(IIO_CHAN_INFO_CALIBSCALE),
142 BIT(IIO_CHAN_INFO_SAMP_FREQ), 14),
143 ADIS_TEMP_CHAN(ADIS16260_TEMP_OUT, ADIS16260_SCAN_TEMP,
144 BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
145 ADIS_SUPPLY_CHAN(ADIS16260_SUPPLY_OUT, ADIS16260_SCAN_SUPPLY,
146 BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
147 ADIS_AUX_ADC_CHAN(ADIS16260_AUX_ADC, ADIS16260_SCAN_AUX_ADC,
148 BIT(IIO_CHAN_INFO_SAMP_FREQ), 12),
149 IIO_CHAN_SOFT_TIMESTAMP(4),
152 static const struct adis16260_chip_info adis16260_chip_info_table[] = {
154 .gyro_max_scale = 80,
155 .gyro_max_val = IIO_RAD_TO_DEGREE(4368),
156 .channels = adis16260_channels,
157 .num_channels = ARRAY_SIZE(adis16260_channels),
160 .gyro_max_scale = 320,
161 .gyro_max_val = IIO_RAD_TO_DEGREE(4368),
162 .channels = adis16260_channels,
163 .num_channels = ARRAY_SIZE(adis16260_channels),
166 .gyro_max_scale = 14000,
167 .gyro_max_val = IIO_RAD_TO_DEGREE(3357),
168 .channels = adis16266_channels,
169 .num_channels = ARRAY_SIZE(adis16266_channels),
173 /* Power down the device */
174 static int adis16260_stop_device(struct iio_dev *indio_dev)
176 struct adis16260 *adis16260 = iio_priv(indio_dev);
178 u16 val = ADIS16260_SLP_CNT_POWER_OFF;
180 ret = adis_write_reg_16(&adis16260->adis, ADIS16260_SLP_CNT, val);
182 dev_err(&indio_dev->dev, "problem with turning device off: SLP_CNT");
187 static const u8 adis16260_addresses[][2] = {
188 [ADIS16260_SCAN_GYRO] = { ADIS16260_GYRO_OFF, ADIS16260_GYRO_SCALE },
191 static int adis16260_read_raw(struct iio_dev *indio_dev,
192 struct iio_chan_spec const *chan,
196 struct adis16260 *adis16260 = iio_priv(indio_dev);
197 const struct adis16260_chip_info *info = adis16260->info;
198 struct adis *adis = &adis16260->adis;
204 case IIO_CHAN_INFO_RAW:
205 return adis_single_conversion(indio_dev, chan,
206 ADIS16260_ERROR_ACTIVE, val);
207 case IIO_CHAN_INFO_SCALE:
208 switch (chan->type) {
210 *val = info->gyro_max_scale;
211 *val2 = info->gyro_max_val;
212 return IIO_VAL_FRACTIONAL;
215 *val2 = IIO_DEGREE_TO_RAD(36630);
216 return IIO_VAL_INT_PLUS_MICRO;
218 if (chan->channel == 0) {
220 *val2 = 831500; /* 1.8315 mV */
223 *val2 = 610500; /* 610.5 uV */
225 return IIO_VAL_INT_PLUS_MICRO;
228 *val2 = 300000; /* 0.1453 C */
229 return IIO_VAL_INT_PLUS_MICRO;
233 case IIO_CHAN_INFO_OFFSET:
234 *val = 250000 / 1453; /* 25 C = 0x00 */
236 case IIO_CHAN_INFO_CALIBBIAS:
237 addr = adis16260_addresses[chan->scan_index][0];
238 ret = adis_read_reg_16(adis, addr, &val16);
242 *val = sign_extend32(val16, 11);
244 case IIO_CHAN_INFO_CALIBSCALE:
245 addr = adis16260_addresses[chan->scan_index][1];
246 ret = adis_read_reg_16(adis, addr, &val16);
252 case IIO_CHAN_INFO_SAMP_FREQ:
253 ret = adis_read_reg_16(adis, ADIS16260_SMPL_PRD, &val16);
257 if (spi_get_device_id(adis->spi)->driver_data)
258 /* If an adis16251 */
259 *val = (val16 & ADIS16260_SMPL_PRD_TIME_BASE) ?
262 *val = (val16 & ADIS16260_SMPL_PRD_TIME_BASE) ?
264 *val /= (val16 & ADIS16260_SMPL_PRD_DIV_MASK) + 1;
270 static int adis16260_write_raw(struct iio_dev *indio_dev,
271 struct iio_chan_spec const *chan,
276 struct adis16260 *adis16260 = iio_priv(indio_dev);
277 struct adis *adis = &adis16260->adis;
283 case IIO_CHAN_INFO_CALIBBIAS:
284 if (val < -2048 || val >= 2048)
287 addr = adis16260_addresses[chan->scan_index][0];
288 return adis_write_reg_16(adis, addr, val);
289 case IIO_CHAN_INFO_CALIBSCALE:
290 if (val < 0 || val >= 4096)
293 addr = adis16260_addresses[chan->scan_index][1];
294 return adis_write_reg_16(adis, addr, val);
295 case IIO_CHAN_INFO_SAMP_FREQ:
296 mutex_lock(&adis->state_lock);
297 if (spi_get_device_id(adis->spi)->driver_data)
302 if (t > ADIS16260_SMPL_PRD_DIV_MASK)
303 t = ADIS16260_SMPL_PRD_DIV_MASK;
308 adis->spi->max_speed_hz = ADIS16260_SPI_SLOW;
310 adis->spi->max_speed_hz = ADIS16260_SPI_FAST;
311 ret = __adis_write_reg_8(adis, ADIS16260_SMPL_PRD, t);
313 mutex_unlock(&adis->state_lock);
319 static const struct iio_info adis16260_info = {
320 .read_raw = &adis16260_read_raw,
321 .write_raw = &adis16260_write_raw,
322 .update_scan_mode = adis_update_scan_mode,
325 static const char * const adis1620_status_error_msgs[] = {
326 [ADIS16260_DIAG_STAT_FLASH_CHK_BIT] = "Flash checksum error",
327 [ADIS16260_DIAG_STAT_SELF_TEST_BIT] = "Self test error",
328 [ADIS16260_DIAG_STAT_OVERFLOW_BIT] = "Sensor overrange",
329 [ADIS16260_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
330 [ADIS16260_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
331 [ADIS16260_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 5.25",
332 [ADIS16260_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 4.75",
335 static const struct adis_timeout adis16260_timeouts = {
336 .reset_ms = ADIS16260_STARTUP_DELAY,
337 .sw_reset_ms = ADIS16260_STARTUP_DELAY,
338 .self_test_ms = ADIS16260_STARTUP_DELAY,
341 static const struct adis_data adis16260_data = {
344 .msc_ctrl_reg = ADIS16260_MSC_CTRL,
345 .glob_cmd_reg = ADIS16260_GLOB_CMD,
346 .diag_stat_reg = ADIS16260_DIAG_STAT,
348 .self_test_mask = ADIS16260_MSC_CTRL_MEM_TEST,
349 .timeouts = &adis16260_timeouts,
351 .status_error_msgs = adis1620_status_error_msgs,
352 .status_error_mask = BIT(ADIS16260_DIAG_STAT_FLASH_CHK_BIT) |
353 BIT(ADIS16260_DIAG_STAT_SELF_TEST_BIT) |
354 BIT(ADIS16260_DIAG_STAT_OVERFLOW_BIT) |
355 BIT(ADIS16260_DIAG_STAT_SPI_FAIL_BIT) |
356 BIT(ADIS16260_DIAG_STAT_FLASH_UPT_BIT) |
357 BIT(ADIS16260_DIAG_STAT_POWER_HIGH_BIT) |
358 BIT(ADIS16260_DIAG_STAT_POWER_LOW_BIT),
361 static int adis16260_probe(struct spi_device *spi)
363 const struct spi_device_id *id;
364 struct adis16260 *adis16260;
365 struct iio_dev *indio_dev;
368 id = spi_get_device_id(spi);
372 /* setup the industrialio driver allocated elements */
373 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adis16260));
376 adis16260 = iio_priv(indio_dev);
377 /* this is only used for removal purposes */
378 spi_set_drvdata(spi, indio_dev);
380 adis16260->info = &adis16260_chip_info_table[id->driver_data];
382 indio_dev->name = id->name;
383 indio_dev->dev.parent = &spi->dev;
384 indio_dev->info = &adis16260_info;
385 indio_dev->channels = adis16260->info->channels;
386 indio_dev->num_channels = adis16260->info->num_channels;
387 indio_dev->modes = INDIO_DIRECT_MODE;
389 ret = adis_init(&adis16260->adis, indio_dev, spi, &adis16260_data);
393 ret = adis_setup_buffer_and_trigger(&adis16260->adis, indio_dev, NULL);
397 /* Get the device into a sane initial state */
398 ret = adis_initial_startup(&adis16260->adis);
400 goto error_cleanup_buffer_trigger;
401 ret = iio_device_register(indio_dev);
403 goto error_cleanup_buffer_trigger;
407 error_cleanup_buffer_trigger:
408 adis_cleanup_buffer_and_trigger(&adis16260->adis, indio_dev);
412 static int adis16260_remove(struct spi_device *spi)
414 struct iio_dev *indio_dev = spi_get_drvdata(spi);
415 struct adis16260 *adis16260 = iio_priv(indio_dev);
417 iio_device_unregister(indio_dev);
418 adis16260_stop_device(indio_dev);
419 adis_cleanup_buffer_and_trigger(&adis16260->adis, indio_dev);
425 * These parts do not need to be differentiated until someone adds
426 * support for the on chip filtering.
428 static const struct spi_device_id adis16260_id[] = {
429 {"adis16260", ADIS16260},
430 {"adis16265", ADIS16260},
431 {"adis16266", ADIS16266},
432 {"adis16250", ADIS16260},
433 {"adis16255", ADIS16260},
434 {"adis16251", ADIS16251},
437 MODULE_DEVICE_TABLE(spi, adis16260_id);
439 static struct spi_driver adis16260_driver = {
443 .probe = adis16260_probe,
444 .remove = adis16260_remove,
445 .id_table = adis16260_id,
447 module_spi_driver(adis16260_driver);
449 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
450 MODULE_DESCRIPTION("Analog Devices ADIS16260/5 Digital Gyroscope Sensor");
451 MODULE_LICENSE("GPL v2");