Commit | Line | Data |
---|---|---|
089a4198 | 1 | /* |
f733d02a | 2 | * ADIS16260/ADIS16265 Programmable Digital Gyroscope Sensor Driver |
089a4198 BS |
3 | * |
4 | * Copyright 2010 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2 or later. | |
7 | */ | |
8 | ||
9 | #include <linux/interrupt.h> | |
10 | #include <linux/irq.h> | |
089a4198 BS |
11 | #include <linux/delay.h> |
12 | #include <linux/mutex.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/spi/spi.h> | |
1cb6c1f5 | 16 | #include <linux/slab.h> |
089a4198 BS |
17 | #include <linux/sysfs.h> |
18 | #include <linux/list.h> | |
99c97852 | 19 | #include <linux/module.h> |
089a4198 BS |
20 | |
21 | #include "../iio.h" | |
22 | #include "../sysfs.h" | |
3811cd62 | 23 | #include "../buffer_generic.h" |
089a4198 BS |
24 | |
25 | #include "adis16260.h" | |
26 | ||
27 | #define DRIVER_NAME "adis16260" | |
28 | ||
29b7f43e | 29 | static int adis16260_check_status(struct iio_dev *indio_dev); |
089a4198 BS |
30 | |
31 | /** | |
32 | * adis16260_spi_write_reg_8() - write single byte to a register | |
29b7f43e | 33 | * @indio_dev: iio_dev for the device |
089a4198 BS |
34 | * @reg_address: the address of the register to be written |
35 | * @val: the value to write | |
36 | **/ | |
29b7f43e | 37 | static int adis16260_spi_write_reg_8(struct iio_dev *indio_dev, |
089a4198 BS |
38 | u8 reg_address, |
39 | u8 val) | |
40 | { | |
41 | int ret; | |
d088ab83 | 42 | struct adis16260_state *st = iio_priv(indio_dev); |
089a4198 BS |
43 | |
44 | mutex_lock(&st->buf_lock); | |
45 | st->tx[0] = ADIS16260_WRITE_REG(reg_address); | |
46 | st->tx[1] = val; | |
47 | ||
48 | ret = spi_write(st->us, st->tx, 2); | |
49 | mutex_unlock(&st->buf_lock); | |
50 | ||
51 | return ret; | |
52 | } | |
53 | ||
54 | /** | |
55 | * adis16260_spi_write_reg_16() - write 2 bytes to a pair of registers | |
29b7f43e | 56 | * @indio_dev: iio_dev for the device |
089a4198 BS |
57 | * @reg_address: the address of the lower of the two registers. Second register |
58 | * is assumed to have address one greater. | |
59 | * @val: value to be written | |
60 | **/ | |
29b7f43e | 61 | static int adis16260_spi_write_reg_16(struct iio_dev *indio_dev, |
089a4198 BS |
62 | u8 lower_reg_address, |
63 | u16 value) | |
64 | { | |
65 | int ret; | |
66 | struct spi_message msg; | |
d088ab83 | 67 | struct adis16260_state *st = iio_priv(indio_dev); |
089a4198 BS |
68 | struct spi_transfer xfers[] = { |
69 | { | |
70 | .tx_buf = st->tx, | |
71 | .bits_per_word = 8, | |
72 | .len = 2, | |
73 | .cs_change = 1, | |
74 | .delay_usecs = 20, | |
75 | }, { | |
76 | .tx_buf = st->tx + 2, | |
77 | .bits_per_word = 8, | |
78 | .len = 2, | |
089a4198 BS |
79 | .delay_usecs = 20, |
80 | }, | |
81 | }; | |
82 | ||
83 | mutex_lock(&st->buf_lock); | |
84 | st->tx[0] = ADIS16260_WRITE_REG(lower_reg_address); | |
85 | st->tx[1] = value & 0xFF; | |
86 | st->tx[2] = ADIS16260_WRITE_REG(lower_reg_address + 1); | |
87 | st->tx[3] = (value >> 8) & 0xFF; | |
88 | ||
89 | spi_message_init(&msg); | |
90 | spi_message_add_tail(&xfers[0], &msg); | |
91 | spi_message_add_tail(&xfers[1], &msg); | |
92 | ret = spi_sync(st->us, &msg); | |
93 | mutex_unlock(&st->buf_lock); | |
94 | ||
95 | return ret; | |
96 | } | |
97 | ||
98 | /** | |
99 | * adis16260_spi_read_reg_16() - read 2 bytes from a 16-bit register | |
29b7f43e | 100 | * @indio_dev: iio_dev for the device |
089a4198 BS |
101 | * @reg_address: the address of the lower of the two registers. Second register |
102 | * is assumed to have address one greater. | |
103 | * @val: somewhere to pass back the value read | |
104 | **/ | |
29b7f43e | 105 | static int adis16260_spi_read_reg_16(struct iio_dev *indio_dev, |
089a4198 BS |
106 | u8 lower_reg_address, |
107 | u16 *val) | |
108 | { | |
109 | struct spi_message msg; | |
d088ab83 | 110 | struct adis16260_state *st = iio_priv(indio_dev); |
089a4198 BS |
111 | int ret; |
112 | struct spi_transfer xfers[] = { | |
113 | { | |
114 | .tx_buf = st->tx, | |
115 | .bits_per_word = 8, | |
116 | .len = 2, | |
117 | .cs_change = 1, | |
118 | .delay_usecs = 30, | |
119 | }, { | |
120 | .rx_buf = st->rx, | |
121 | .bits_per_word = 8, | |
122 | .len = 2, | |
089a4198 BS |
123 | .delay_usecs = 30, |
124 | }, | |
125 | }; | |
126 | ||
127 | mutex_lock(&st->buf_lock); | |
128 | st->tx[0] = ADIS16260_READ_REG(lower_reg_address); | |
129 | st->tx[1] = 0; | |
089a4198 BS |
130 | |
131 | spi_message_init(&msg); | |
132 | spi_message_add_tail(&xfers[0], &msg); | |
133 | spi_message_add_tail(&xfers[1], &msg); | |
134 | ret = spi_sync(st->us, &msg); | |
135 | if (ret) { | |
136 | dev_err(&st->us->dev, | |
137 | "problem when reading 16 bit register 0x%02X", | |
138 | lower_reg_address); | |
139 | goto error_ret; | |
140 | } | |
141 | *val = (st->rx[0] << 8) | st->rx[1]; | |
142 | ||
143 | error_ret: | |
144 | mutex_unlock(&st->buf_lock); | |
145 | return ret; | |
146 | } | |
147 | ||
03d1b7d3 JC |
148 | static ssize_t adis16260_read_frequency_available(struct device *dev, |
149 | struct device_attribute *attr, | |
150 | char *buf) | |
151 | { | |
152 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
d088ab83 | 153 | struct adis16260_state *st = iio_priv(indio_dev); |
03d1b7d3 JC |
154 | if (spi_get_device_id(st->us)->driver_data) |
155 | return sprintf(buf, "%s\n", "0.129 ~ 256"); | |
156 | else | |
157 | return sprintf(buf, "%s\n", "256 2048"); | |
158 | } | |
159 | ||
089a4198 BS |
160 | static ssize_t adis16260_read_frequency(struct device *dev, |
161 | struct device_attribute *attr, | |
162 | char *buf) | |
163 | { | |
03d1b7d3 | 164 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
d088ab83 | 165 | struct adis16260_state *st = iio_priv(indio_dev); |
089a4198 BS |
166 | int ret, len = 0; |
167 | u16 t; | |
168 | int sps; | |
29b7f43e | 169 | ret = adis16260_spi_read_reg_16(indio_dev, |
089a4198 BS |
170 | ADIS16260_SMPL_PRD, |
171 | &t); | |
172 | if (ret) | |
173 | return ret; | |
03d1b7d3 JC |
174 | |
175 | if (spi_get_device_id(st->us)->driver_data) /* If an adis16251 */ | |
176 | sps = (t & ADIS16260_SMPL_PRD_TIME_BASE) ? 8 : 256; | |
177 | else | |
178 | sps = (t & ADIS16260_SMPL_PRD_TIME_BASE) ? 66 : 2048; | |
089a4198 BS |
179 | sps /= (t & ADIS16260_SMPL_PRD_DIV_MASK) + 1; |
180 | len = sprintf(buf, "%d SPS\n", sps); | |
181 | return len; | |
182 | } | |
183 | ||
184 | static ssize_t adis16260_write_frequency(struct device *dev, | |
185 | struct device_attribute *attr, | |
186 | const char *buf, | |
187 | size_t len) | |
188 | { | |
189 | struct iio_dev *indio_dev = dev_get_drvdata(dev); | |
d088ab83 | 190 | struct adis16260_state *st = iio_priv(indio_dev); |
089a4198 BS |
191 | long val; |
192 | int ret; | |
193 | u8 t; | |
194 | ||
195 | ret = strict_strtol(buf, 10, &val); | |
196 | if (ret) | |
197 | return ret; | |
198 | ||
199 | mutex_lock(&indio_dev->mlock); | |
03d1b7d3 JC |
200 | if (spi_get_device_id(st->us)) { |
201 | t = (256 / val); | |
202 | if (t > 0) | |
203 | t--; | |
204 | t &= ADIS16260_SMPL_PRD_DIV_MASK; | |
205 | } else { | |
206 | t = (2048 / val); | |
207 | if (t > 0) | |
208 | t--; | |
209 | t &= ADIS16260_SMPL_PRD_DIV_MASK; | |
210 | } | |
089a4198 BS |
211 | if ((t & ADIS16260_SMPL_PRD_DIV_MASK) >= 0x0A) |
212 | st->us->max_speed_hz = ADIS16260_SPI_SLOW; | |
213 | else | |
214 | st->us->max_speed_hz = ADIS16260_SPI_FAST; | |
29b7f43e | 215 | ret = adis16260_spi_write_reg_8(indio_dev, |
089a4198 BS |
216 | ADIS16260_SMPL_PRD, |
217 | t); | |
218 | ||
219 | mutex_unlock(&indio_dev->mlock); | |
220 | ||
221 | return ret ? ret : len; | |
222 | } | |
223 | ||
29b7f43e | 224 | static int adis16260_reset(struct iio_dev *indio_dev) |
089a4198 BS |
225 | { |
226 | int ret; | |
29b7f43e | 227 | ret = adis16260_spi_write_reg_8(indio_dev, |
089a4198 BS |
228 | ADIS16260_GLOB_CMD, |
229 | ADIS16260_GLOB_CMD_SW_RESET); | |
230 | if (ret) | |
29b7f43e | 231 | dev_err(&indio_dev->dev, "problem resetting device"); |
089a4198 BS |
232 | |
233 | return ret; | |
234 | } | |
235 | ||
236 | static ssize_t adis16260_write_reset(struct device *dev, | |
237 | struct device_attribute *attr, | |
238 | const char *buf, size_t len) | |
239 | { | |
29b7f43e | 240 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
089a4198 BS |
241 | if (len < 1) |
242 | return -EINVAL; | |
243 | switch (buf[0]) { | |
244 | case '1': | |
245 | case 'y': | |
246 | case 'Y': | |
29b7f43e | 247 | return adis16260_reset(indio_dev); |
089a4198 BS |
248 | } |
249 | return -EINVAL; | |
250 | } | |
251 | ||
29b7f43e | 252 | int adis16260_set_irq(struct iio_dev *indio_dev, bool enable) |
089a4198 BS |
253 | { |
254 | int ret; | |
255 | u16 msc; | |
29b7f43e | 256 | ret = adis16260_spi_read_reg_16(indio_dev, ADIS16260_MSC_CTRL, &msc); |
089a4198 BS |
257 | if (ret) |
258 | goto error_ret; | |
259 | ||
260 | msc |= ADIS16260_MSC_CTRL_DATA_RDY_POL_HIGH; | |
261 | if (enable) | |
262 | msc |= ADIS16260_MSC_CTRL_DATA_RDY_EN; | |
263 | else | |
264 | msc &= ~ADIS16260_MSC_CTRL_DATA_RDY_EN; | |
265 | ||
29b7f43e | 266 | ret = adis16260_spi_write_reg_16(indio_dev, ADIS16260_MSC_CTRL, msc); |
089a4198 BS |
267 | if (ret) |
268 | goto error_ret; | |
269 | ||
270 | error_ret: | |
271 | return ret; | |
272 | } | |
273 | ||
274 | /* Power down the device */ | |
29b7f43e | 275 | static int adis16260_stop_device(struct iio_dev *indio_dev) |
089a4198 BS |
276 | { |
277 | int ret; | |
278 | u16 val = ADIS16260_SLP_CNT_POWER_OFF; | |
279 | ||
29b7f43e | 280 | ret = adis16260_spi_write_reg_16(indio_dev, ADIS16260_SLP_CNT, val); |
089a4198 | 281 | if (ret) |
29b7f43e | 282 | dev_err(&indio_dev->dev, "problem with turning device off: SLP_CNT"); |
089a4198 BS |
283 | |
284 | return ret; | |
285 | } | |
286 | ||
29b7f43e | 287 | static int adis16260_self_test(struct iio_dev *indio_dev) |
089a4198 BS |
288 | { |
289 | int ret; | |
29b7f43e | 290 | ret = adis16260_spi_write_reg_16(indio_dev, |
089a4198 BS |
291 | ADIS16260_MSC_CTRL, |
292 | ADIS16260_MSC_CTRL_MEM_TEST); | |
293 | if (ret) { | |
29b7f43e | 294 | dev_err(&indio_dev->dev, "problem starting self test"); |
089a4198 BS |
295 | goto err_ret; |
296 | } | |
297 | ||
29b7f43e | 298 | adis16260_check_status(indio_dev); |
089a4198 BS |
299 | |
300 | err_ret: | |
301 | return ret; | |
302 | } | |
303 | ||
29b7f43e | 304 | static int adis16260_check_status(struct iio_dev *indio_dev) |
089a4198 BS |
305 | { |
306 | u16 status; | |
307 | int ret; | |
29b7f43e | 308 | struct device *dev = &indio_dev->dev; |
089a4198 | 309 | |
29b7f43e JC |
310 | ret = adis16260_spi_read_reg_16(indio_dev, |
311 | ADIS16260_DIAG_STAT, | |
312 | &status); | |
089a4198 BS |
313 | |
314 | if (ret < 0) { | |
315 | dev_err(dev, "Reading status failed\n"); | |
316 | goto error_ret; | |
317 | } | |
318 | ret = status & 0x7F; | |
319 | if (status & ADIS16260_DIAG_STAT_FLASH_CHK) | |
320 | dev_err(dev, "Flash checksum error\n"); | |
321 | if (status & ADIS16260_DIAG_STAT_SELF_TEST) | |
322 | dev_err(dev, "Self test error\n"); | |
323 | if (status & ADIS16260_DIAG_STAT_OVERFLOW) | |
324 | dev_err(dev, "Sensor overrange\n"); | |
325 | if (status & ADIS16260_DIAG_STAT_SPI_FAIL) | |
326 | dev_err(dev, "SPI failure\n"); | |
327 | if (status & ADIS16260_DIAG_STAT_FLASH_UPT) | |
328 | dev_err(dev, "Flash update failed\n"); | |
329 | if (status & ADIS16260_DIAG_STAT_POWER_HIGH) | |
330 | dev_err(dev, "Power supply above 5.25V\n"); | |
331 | if (status & ADIS16260_DIAG_STAT_POWER_LOW) | |
332 | dev_err(dev, "Power supply below 4.75V\n"); | |
333 | ||
334 | error_ret: | |
335 | return ret; | |
336 | } | |
337 | ||
29b7f43e | 338 | static int adis16260_initial_setup(struct iio_dev *indio_dev) |
089a4198 BS |
339 | { |
340 | int ret; | |
29b7f43e | 341 | struct device *dev = &indio_dev->dev; |
089a4198 BS |
342 | |
343 | /* Disable IRQ */ | |
29b7f43e | 344 | ret = adis16260_set_irq(indio_dev, false); |
089a4198 BS |
345 | if (ret) { |
346 | dev_err(dev, "disable irq failed"); | |
347 | goto err_ret; | |
348 | } | |
349 | ||
350 | /* Do self test */ | |
29b7f43e | 351 | ret = adis16260_self_test(indio_dev); |
089a4198 BS |
352 | if (ret) { |
353 | dev_err(dev, "self test failure"); | |
354 | goto err_ret; | |
355 | } | |
356 | ||
357 | /* Read status register to check the result */ | |
29b7f43e | 358 | ret = adis16260_check_status(indio_dev); |
089a4198 | 359 | if (ret) { |
29b7f43e | 360 | adis16260_reset(indio_dev); |
089a4198 BS |
361 | dev_err(dev, "device not playing ball -> reset"); |
362 | msleep(ADIS16260_STARTUP_DELAY); | |
29b7f43e | 363 | ret = adis16260_check_status(indio_dev); |
089a4198 BS |
364 | if (ret) { |
365 | dev_err(dev, "giving up"); | |
366 | goto err_ret; | |
367 | } | |
368 | } | |
369 | ||
089a4198 BS |
370 | err_ret: |
371 | return ret; | |
372 | } | |
373 | ||
089a4198 BS |
374 | static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, |
375 | adis16260_read_frequency, | |
376 | adis16260_write_frequency); | |
089a4198 BS |
377 | |
378 | static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16260_write_reset, 0); | |
379 | ||
03d1b7d3 JC |
380 | static IIO_DEVICE_ATTR(sampling_frequency_available, |
381 | S_IRUGO, adis16260_read_frequency_available, NULL, 0); | |
089a4198 | 382 | |
29b7f43e JC |
383 | enum adis16260_channel { |
384 | gyro, | |
385 | temp, | |
386 | in_supply, | |
387 | in_aux, | |
388 | angle, | |
389 | }; | |
390 | #define ADIS16260_GYRO_CHANNEL_SET(axis, mod) \ | |
391 | struct iio_chan_spec adis16260_channels_##axis[] = { \ | |
41ea040c | 392 | IIO_CHAN(IIO_ANGL_VEL, 1, 0, 0, NULL, 0, mod, \ |
29b7f43e JC |
393 | (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) | \ |
394 | (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) | \ | |
395 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), \ | |
396 | gyro, ADIS16260_SCAN_GYRO, \ | |
397 | IIO_ST('s', 14, 16, 0), 0), \ | |
398 | IIO_CHAN(IIO_ANGL, 1, 0, 0, NULL, 0, mod, \ | |
399 | 0, \ | |
400 | angle, ADIS16260_SCAN_ANGL, \ | |
401 | IIO_ST('u', 14, 16, 0), 0), \ | |
402 | IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0, \ | |
403 | (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) | \ | |
404 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), \ | |
405 | temp, ADIS16260_SCAN_TEMP, \ | |
406 | IIO_ST('u', 12, 16, 0), 0), \ | |
6835cb6b | 407 | IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "supply", 0, 0, \ |
29b7f43e JC |
408 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), \ |
409 | in_supply, ADIS16260_SCAN_SUPPLY, \ | |
410 | IIO_ST('u', 12, 16, 0), 0), \ | |
6835cb6b | 411 | IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0, \ |
29b7f43e JC |
412 | (1 << IIO_CHAN_INFO_SCALE_SEPARATE), \ |
413 | in_aux, ADIS16260_SCAN_AUX_ADC, \ | |
414 | IIO_ST('u', 12, 16, 0), 0), \ | |
415 | IIO_CHAN_SOFT_TIMESTAMP(5) \ | |
416 | } | |
089a4198 | 417 | |
29b7f43e JC |
418 | static const ADIS16260_GYRO_CHANNEL_SET(x, IIO_MOD_X); |
419 | static const ADIS16260_GYRO_CHANNEL_SET(y, IIO_MOD_Y); | |
420 | static const ADIS16260_GYRO_CHANNEL_SET(z, IIO_MOD_Z); | |
421 | ||
422 | static const u8 adis16260_addresses[5][3] = { | |
423 | [gyro] = { ADIS16260_GYRO_OUT, | |
424 | ADIS16260_GYRO_OFF, | |
425 | ADIS16260_GYRO_SCALE }, | |
426 | [angle] = { ADIS16260_ANGL_OUT }, | |
427 | [in_supply] = { ADIS16260_SUPPLY_OUT }, | |
428 | [in_aux] = { ADIS16260_AUX_ADC }, | |
429 | [temp] = { ADIS16260_TEMP_OUT }, | |
430 | }; | |
431 | static int adis16260_read_raw(struct iio_dev *indio_dev, | |
432 | struct iio_chan_spec const *chan, | |
433 | int *val, int *val2, | |
434 | long mask) | |
435 | { | |
d088ab83 | 436 | struct adis16260_state *st = iio_priv(indio_dev); |
29b7f43e JC |
437 | int ret; |
438 | int bits; | |
439 | u8 addr; | |
440 | s16 val16; | |
441 | ||
442 | switch (mask) { | |
443 | case 0: | |
444 | mutex_lock(&indio_dev->mlock); | |
445 | addr = adis16260_addresses[chan->address][0]; | |
446 | ret = adis16260_spi_read_reg_16(indio_dev, addr, &val16); | |
8f896155 DC |
447 | if (ret) { |
448 | mutex_unlock(&indio_dev->mlock); | |
29b7f43e | 449 | return ret; |
8f896155 | 450 | } |
29b7f43e JC |
451 | |
452 | if (val16 & ADIS16260_ERROR_ACTIVE) { | |
453 | ret = adis16260_check_status(indio_dev); | |
8f896155 DC |
454 | if (ret) { |
455 | mutex_unlock(&indio_dev->mlock); | |
29b7f43e | 456 | return ret; |
8f896155 | 457 | } |
29b7f43e JC |
458 | } |
459 | val16 = val16 & ((1 << chan->scan_type.realbits) - 1); | |
460 | if (chan->scan_type.sign == 's') | |
461 | val16 = (s16)(val16 << | |
462 | (16 - chan->scan_type.realbits)) >> | |
463 | (16 - chan->scan_type.realbits); | |
464 | *val = val16; | |
465 | mutex_unlock(&indio_dev->mlock); | |
466 | return IIO_VAL_INT; | |
467 | case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): | |
468 | case (1 << IIO_CHAN_INFO_SCALE_SHARED): | |
469 | switch (chan->type) { | |
41ea040c | 470 | case IIO_ANGL_VEL: |
29b7f43e JC |
471 | *val = 0; |
472 | if (spi_get_device_id(st->us)->driver_data) | |
473 | *val2 = 320; | |
474 | else | |
475 | *val2 = 1278; | |
476 | return IIO_VAL_INT_PLUS_MICRO; | |
6835cb6b | 477 | case IIO_VOLTAGE: |
29b7f43e JC |
478 | *val = 0; |
479 | if (chan->channel == 0) | |
480 | *val2 = 18315; | |
481 | else | |
482 | *val2 = 610500; | |
483 | return IIO_VAL_INT_PLUS_MICRO; | |
484 | case IIO_TEMP: | |
485 | *val = 0; | |
486 | *val2 = 145300; | |
487 | return IIO_VAL_INT_PLUS_MICRO; | |
488 | default: | |
489 | return -EINVAL; | |
490 | } | |
491 | break; | |
492 | case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): | |
493 | *val = 25; | |
494 | return IIO_VAL_INT; | |
495 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): | |
496 | switch (chan->type) { | |
41ea040c | 497 | case IIO_ANGL_VEL: |
29b7f43e JC |
498 | bits = 12; |
499 | break; | |
500 | default: | |
501 | return -EINVAL; | |
502 | }; | |
503 | mutex_lock(&indio_dev->mlock); | |
504 | addr = adis16260_addresses[chan->address][1]; | |
505 | ret = adis16260_spi_read_reg_16(indio_dev, addr, &val16); | |
506 | if (ret) { | |
507 | mutex_unlock(&indio_dev->mlock); | |
508 | return ret; | |
509 | } | |
510 | val16 &= (1 << bits) - 1; | |
511 | val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); | |
512 | *val = val16; | |
513 | mutex_unlock(&indio_dev->mlock); | |
514 | return IIO_VAL_INT; | |
515 | case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE): | |
516 | switch (chan->type) { | |
41ea040c | 517 | case IIO_ANGL_VEL: |
29b7f43e JC |
518 | bits = 12; |
519 | break; | |
520 | default: | |
521 | return -EINVAL; | |
522 | }; | |
523 | mutex_lock(&indio_dev->mlock); | |
524 | addr = adis16260_addresses[chan->address][2]; | |
525 | ret = adis16260_spi_read_reg_16(indio_dev, addr, &val16); | |
526 | if (ret) { | |
527 | mutex_unlock(&indio_dev->mlock); | |
528 | return ret; | |
529 | } | |
530 | *val = (1 << bits) - 1; | |
531 | mutex_unlock(&indio_dev->mlock); | |
532 | return IIO_VAL_INT; | |
533 | } | |
534 | return -EINVAL; | |
535 | } | |
536 | ||
537 | static int adis16260_write_raw(struct iio_dev *indio_dev, | |
538 | struct iio_chan_spec const *chan, | |
539 | int val, | |
540 | int val2, | |
541 | long mask) | |
542 | { | |
543 | int bits = 12; | |
544 | s16 val16; | |
545 | u8 addr; | |
546 | switch (mask) { | |
547 | case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): | |
548 | val16 = val & ((1 << bits) - 1); | |
549 | addr = adis16260_addresses[chan->address][1]; | |
550 | return adis16260_spi_write_reg_16(indio_dev, addr, val16); | |
551 | case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE): | |
552 | val16 = val & ((1 << bits) - 1); | |
553 | addr = adis16260_addresses[chan->address][2]; | |
554 | return adis16260_spi_write_reg_16(indio_dev, addr, val16); | |
555 | } | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | static struct attribute *adis16260_attributes[] = { | |
560 | &iio_dev_attr_sampling_frequency.dev_attr.attr, | |
561 | &iio_dev_attr_sampling_frequency_available.dev_attr.attr, | |
562 | &iio_dev_attr_reset.dev_attr.attr, | |
563 | NULL | |
564 | }; | |
565 | ||
566 | static const struct attribute_group adis16260_attribute_group = { | |
567 | .attrs = adis16260_attributes, | |
568 | }; | |
089a4198 | 569 | |
6fe8135f JC |
570 | static const struct iio_info adis16260_info = { |
571 | .attrs = &adis16260_attribute_group, | |
572 | .read_raw = &adis16260_read_raw, | |
573 | .write_raw = &adis16260_write_raw, | |
574 | .driver_module = THIS_MODULE, | |
575 | }; | |
576 | ||
089a4198 BS |
577 | static int __devinit adis16260_probe(struct spi_device *spi) |
578 | { | |
26d25ae3 | 579 | int ret; |
fe346048 | 580 | struct adis16260_platform_data *pd = spi->dev.platform_data; |
d088ab83 JC |
581 | struct adis16260_state *st; |
582 | struct iio_dev *indio_dev; | |
583 | ||
584 | /* setup the industrialio driver allocated elements */ | |
585 | indio_dev = iio_allocate_device(sizeof(*st)); | |
586 | if (indio_dev == NULL) { | |
587 | ret = -ENOMEM; | |
089a4198 BS |
588 | goto error_ret; |
589 | } | |
d088ab83 | 590 | st = iio_priv(indio_dev); |
fe346048 JC |
591 | if (pd) |
592 | st->negate = pd->negate; | |
089a4198 BS |
593 | /* this is only used for removal purposes */ |
594 | spi_set_drvdata(spi, st); | |
595 | ||
089a4198 BS |
596 | st->us = spi; |
597 | mutex_init(&st->buf_lock); | |
089a4198 | 598 | |
d088ab83 JC |
599 | indio_dev->name = spi_get_device_id(st->us)->name; |
600 | indio_dev->dev.parent = &spi->dev; | |
601 | indio_dev->info = &adis16260_info; | |
602 | indio_dev->num_channels | |
29b7f43e | 603 | = ARRAY_SIZE(adis16260_channels_x); |
fe346048 JC |
604 | if (pd && pd->direction) |
605 | switch (pd->direction) { | |
606 | case 'x': | |
d088ab83 | 607 | indio_dev->channels = adis16260_channels_x; |
fe346048 JC |
608 | break; |
609 | case 'y': | |
d088ab83 | 610 | indio_dev->channels = adis16260_channels_y; |
fe346048 JC |
611 | break; |
612 | case 'z': | |
d088ab83 | 613 | indio_dev->channels = adis16260_channels_z; |
fe346048 JC |
614 | break; |
615 | default: | |
29b7f43e | 616 | return -EINVAL; |
fe346048 JC |
617 | } |
618 | else | |
d088ab83 | 619 | indio_dev->channels = adis16260_channels_x; |
7bcf302f | 620 | indio_dev->num_channels = ARRAY_SIZE(adis16260_channels_x); |
d088ab83 | 621 | indio_dev->modes = INDIO_DIRECT_MODE; |
089a4198 | 622 | |
d088ab83 | 623 | ret = adis16260_configure_ring(indio_dev); |
089a4198 BS |
624 | if (ret) |
625 | goto error_free_dev; | |
626 | ||
14555b14 JC |
627 | ret = iio_buffer_register(indio_dev, |
628 | indio_dev->channels, | |
629 | ARRAY_SIZE(adis16260_channels_x)); | |
089a4198 BS |
630 | if (ret) { |
631 | printk(KERN_ERR "failed to initialize the ring\n"); | |
632 | goto error_unreg_ring_funcs; | |
633 | } | |
14555b14 | 634 | if (indio_dev->buffer) { |
bd94c6a8 | 635 | /* Set default scan mode */ |
14555b14 JC |
636 | iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_SUPPLY); |
637 | iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_GYRO); | |
638 | iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_AUX_ADC); | |
639 | iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_TEMP); | |
640 | iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_ANGL); | |
bd94c6a8 | 641 | } |
089a4198 | 642 | if (spi->irq) { |
d088ab83 | 643 | ret = adis16260_probe_trigger(indio_dev); |
089a4198 | 644 | if (ret) |
ab8d48d4 | 645 | goto error_uninitialize_ring; |
089a4198 BS |
646 | } |
647 | ||
648 | /* Get the device into a sane initial state */ | |
d088ab83 | 649 | ret = adis16260_initial_setup(indio_dev); |
089a4198 BS |
650 | if (ret) |
651 | goto error_remove_trigger; | |
26d25ae3 JC |
652 | ret = iio_device_register(indio_dev); |
653 | if (ret) | |
654 | goto error_remove_trigger; | |
655 | ||
089a4198 BS |
656 | return 0; |
657 | ||
658 | error_remove_trigger: | |
d088ab83 | 659 | adis16260_remove_trigger(indio_dev); |
089a4198 | 660 | error_uninitialize_ring: |
14555b14 | 661 | iio_buffer_unregister(indio_dev); |
089a4198 | 662 | error_unreg_ring_funcs: |
d088ab83 | 663 | adis16260_unconfigure_ring(indio_dev); |
089a4198 | 664 | error_free_dev: |
26d25ae3 | 665 | iio_free_device(indio_dev); |
089a4198 BS |
666 | error_ret: |
667 | return ret; | |
668 | } | |
669 | ||
670 | static int adis16260_remove(struct spi_device *spi) | |
671 | { | |
672 | int ret; | |
d088ab83 | 673 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
089a4198 | 674 | |
d2fffd6c JC |
675 | iio_device_unregister(indio_dev); |
676 | ||
29b7f43e | 677 | ret = adis16260_stop_device(indio_dev); |
089a4198 BS |
678 | if (ret) |
679 | goto err_ret; | |
680 | ||
681 | flush_scheduled_work(); | |
682 | ||
683 | adis16260_remove_trigger(indio_dev); | |
14555b14 | 684 | iio_buffer_unregister(indio_dev); |
089a4198 | 685 | adis16260_unconfigure_ring(indio_dev); |
d2fffd6c | 686 | iio_free_device(indio_dev); |
089a4198 | 687 | |
089a4198 BS |
688 | err_ret: |
689 | return ret; | |
690 | } | |
691 | ||
fe346048 JC |
692 | /* |
693 | * These parts do not need to be differentiated until someone adds | |
694 | * support for the on chip filtering. | |
695 | */ | |
a9672951 JC |
696 | static const struct spi_device_id adis16260_id[] = { |
697 | {"adis16260", 0}, | |
698 | {"adis16265", 0}, | |
fe346048 JC |
699 | {"adis16250", 0}, |
700 | {"adis16255", 0}, | |
03d1b7d3 | 701 | {"adis16251", 1}, |
a9672951 JC |
702 | {} |
703 | }; | |
704 | ||
089a4198 BS |
705 | static struct spi_driver adis16260_driver = { |
706 | .driver = { | |
707 | .name = "adis16260", | |
708 | .owner = THIS_MODULE, | |
709 | }, | |
710 | .probe = adis16260_probe, | |
711 | .remove = __devexit_p(adis16260_remove), | |
a9672951 | 712 | .id_table = adis16260_id, |
089a4198 BS |
713 | }; |
714 | ||
715 | static __init int adis16260_init(void) | |
716 | { | |
717 | return spi_register_driver(&adis16260_driver); | |
718 | } | |
719 | module_init(adis16260_init); | |
720 | ||
721 | static __exit void adis16260_exit(void) | |
722 | { | |
723 | spi_unregister_driver(&adis16260_driver); | |
724 | } | |
725 | module_exit(adis16260_exit); | |
726 | ||
727 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); | |
728 | MODULE_DESCRIPTION("Analog Devices ADIS16260/5 Digital Gyroscope Sensor"); | |
729 | MODULE_LICENSE("GPL v2"); |