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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / iio / accel / mma9553.c
blob8536743a6886d05420ea618251eb37699436dc8a
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Freescale MMA9553L Intelligent Pedometer driver
4 * Copyright (c) 2014, Intel Corporation.
5 */
6
7 #include <linux/i2c.h>
8 #include <linux/interrupt.h>
9 #include <linux/mod_devicetable.h>
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/iio/iio.h>
13 #include <linux/iio/sysfs.h>
14 #include <linux/iio/events.h>
15 #include <linux/pm_runtime.h>
16 #include "mma9551_core.h"
17
18 #define MMA9553_DRV_NAME "mma9553"
19 #define MMA9553_IRQ_NAME "mma9553_event"
20
21 /* Pedometer configuration registers (R/W) */
22 #define MMA9553_REG_CONF_SLEEPMIN 0x00
23 #define MMA9553_REG_CONF_SLEEPMAX 0x02
24 #define MMA9553_REG_CONF_SLEEPTHD 0x04
25 #define MMA9553_MASK_CONF_WORD GENMASK(15, 0)
26
27 #define MMA9553_REG_CONF_CONF_STEPLEN 0x06
28 #define MMA9553_MASK_CONF_CONFIG BIT(15)
29 #define MMA9553_MASK_CONF_ACT_DBCNTM BIT(14)
30 #define MMA9553_MASK_CONF_SLP_DBCNTM BIT(13)
31 #define MMA9553_MASK_CONF_STEPLEN GENMASK(7, 0)
32
33 #define MMA9553_REG_CONF_HEIGHT_WEIGHT 0x08
34 #define MMA9553_MASK_CONF_HEIGHT GENMASK(15, 8)
35 #define MMA9553_MASK_CONF_WEIGHT GENMASK(7, 0)
36
37 #define MMA9553_REG_CONF_FILTER 0x0A
38 #define MMA9553_MASK_CONF_FILTSTEP GENMASK(15, 8)
39 #define MMA9553_MASK_CONF_MALE BIT(7)
40 #define MMA9553_MASK_CONF_FILTTIME GENMASK(6, 0)
41
42 #define MMA9553_REG_CONF_SPEED_STEP 0x0C
43 #define MMA9553_MASK_CONF_SPDPRD GENMASK(15, 8)
44 #define MMA9553_MASK_CONF_STEPCOALESCE GENMASK(7, 0)
45
46 #define MMA9553_REG_CONF_ACTTHD 0x0E
47 #define MMA9553_MAX_ACTTHD GENMASK(15, 0)
48
49 /* Pedometer status registers (R-only) */
50 #define MMA9553_REG_STATUS 0x00
51 #define MMA9553_MASK_STATUS_MRGFL BIT(15)
52 #define MMA9553_MASK_STATUS_SUSPCHG BIT(14)
53 #define MMA9553_MASK_STATUS_STEPCHG BIT(13)
54 #define MMA9553_MASK_STATUS_ACTCHG BIT(12)
55 #define MMA9553_MASK_STATUS_SUSP BIT(11)
56 #define MMA9553_MASK_STATUS_ACTIVITY GENMASK(10, 8)
57 #define MMA9553_MASK_STATUS_VERSION GENMASK(7, 0)
58
59 #define MMA9553_REG_STEPCNT 0x02
60 #define MMA9553_REG_DISTANCE 0x04
61 #define MMA9553_REG_SPEED 0x06
62 #define MMA9553_REG_CALORIES 0x08
63 #define MMA9553_REG_SLEEPCNT 0x0A
64
65 /* Pedometer events are always mapped to this pin. */
66 #define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
67 #define MMA9553_DEFAULT_GPIO_POLARITY 0
68
69 /* Bitnum used for GPIO configuration = bit number in high status byte */
70 #define MMA9553_STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
71 #define MMA9553_MAX_BITNUM MMA9553_STATUS_TO_BITNUM(BIT(16))
72
73 #define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
74
75 /*
76 * The internal activity level must be stable for ACTTHD samples before
77 * ACTIVITY is updated. The ACTIVITY variable contains the current activity
78 * level and is updated every time a step is detected or once a second
79 * if there are no steps.
80 */
81 #define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE)
82 #define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE)
83
84 /*
85 * Autonomously suspend pedometer if acceleration vector magnitude
86 * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
87 */
88 #define MMA9553_DEFAULT_SLEEPMIN 3688 /* 0,9 g */
89 #define MMA9553_DEFAULT_SLEEPMAX 4508 /* 1,1 g */
90 #define MMA9553_DEFAULT_SLEEPTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30)
91
92 #define MMA9553_CONFIG_RETRIES 2
93
94 /* Status register - activity field */
95 enum activity_level {
96 ACTIVITY_UNKNOWN,
97 ACTIVITY_REST,
98 ACTIVITY_WALKING,
99 ACTIVITY_JOGGING,
100 ACTIVITY_RUNNING,
101 };
102
103 static struct mma9553_event_info {
104 enum iio_chan_type type;
105 enum iio_modifier mod;
106 enum iio_event_direction dir;
107 } mma9553_events_info[] = {
108 {
109 .type = IIO_STEPS,
110 .mod = IIO_NO_MOD,
111 .dir = IIO_EV_DIR_NONE,
112 },
113 {
114 .type = IIO_ACTIVITY,
115 .mod = IIO_MOD_STILL,
116 .dir = IIO_EV_DIR_RISING,
117 },
118 {
119 .type = IIO_ACTIVITY,
120 .mod = IIO_MOD_STILL,
121 .dir = IIO_EV_DIR_FALLING,
122 },
123 {
124 .type = IIO_ACTIVITY,
125 .mod = IIO_MOD_WALKING,
126 .dir = IIO_EV_DIR_RISING,
127 },
128 {
129 .type = IIO_ACTIVITY,
130 .mod = IIO_MOD_WALKING,
131 .dir = IIO_EV_DIR_FALLING,
132 },
133 {
134 .type = IIO_ACTIVITY,
135 .mod = IIO_MOD_JOGGING,
136 .dir = IIO_EV_DIR_RISING,
137 },
138 {
139 .type = IIO_ACTIVITY,
140 .mod = IIO_MOD_JOGGING,
141 .dir = IIO_EV_DIR_FALLING,
142 },
143 {
144 .type = IIO_ACTIVITY,
145 .mod = IIO_MOD_RUNNING,
146 .dir = IIO_EV_DIR_RISING,
147 },
148 {
149 .type = IIO_ACTIVITY,
150 .mod = IIO_MOD_RUNNING,
151 .dir = IIO_EV_DIR_FALLING,
152 },
153 };
154
155 #define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info)
156
157 struct mma9553_event {
158 struct mma9553_event_info *info;
159 bool enabled;
160 };
161
162 struct mma9553_conf_regs {
163 u16 sleepmin;
164 u16 sleepmax;
165 u16 sleepthd;
166 u16 config;
167 u16 height_weight;
168 u16 filter;
169 u16 speed_step;
170 u16 actthd;
171 } __packed;
172
173 struct mma9553_data {
174 struct i2c_client *client;
175 /*
176 * 1. Serialize access to HW (requested by mma9551_core API).
177 * 2. Serialize sequences that power on/off the device and access HW.
178 */
179 struct mutex mutex;
180 struct mma9553_conf_regs conf;
181 struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE];
182 int num_events;
183 u8 gpio_bitnum;
184 /*
185 * This is used for all features that depend on step count:
186 * step count, distance, speed, calories.
187 */
188 bool stepcnt_enabled;
189 u16 stepcnt;
190 u8 activity;
191 s64 timestamp;
192 };
193
194 static u8 mma9553_get_bits(u16 val, u16 mask)
195 {
196 return (val & mask) >> (ffs(mask) - 1);
197 }
198
199 static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
200 {
201 return (current_val & ~mask) | (val << (ffs(mask) - 1));
202 }
203
204 static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
205 {
206 switch (activity) {
207 case ACTIVITY_RUNNING:
208 return IIO_MOD_RUNNING;
209 case ACTIVITY_JOGGING:
210 return IIO_MOD_JOGGING;
211 case ACTIVITY_WALKING:
212 return IIO_MOD_WALKING;
213 case ACTIVITY_REST:
214 return IIO_MOD_STILL;
215 case ACTIVITY_UNKNOWN:
216 default:
217 return IIO_NO_MOD;
218 }
219 }
220
221 static void mma9553_init_events(struct mma9553_data *data)
222 {
223 int i;
224
225 data->num_events = MMA9553_EVENTS_INFO_SIZE;
226 for (i = 0; i < data->num_events; i++) {
227 data->events[i].info = &mma9553_events_info[i];
228 data->events[i].enabled = false;
229 }
230 }
231
232 static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
233 enum iio_chan_type type,
234 enum iio_modifier mod,
235 enum iio_event_direction dir)
236 {
237 int i;
238
239 for (i = 0; i < data->num_events; i++)
240 if (data->events[i].info->type == type &&
241 data->events[i].info->mod == mod &&
242 data->events[i].info->dir == dir)
243 return &data->events[i];
244
245 return NULL;
246 }
247
248 static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
249 bool check_type,
250 enum iio_chan_type type)
251 {
252 int i;
253
254 for (i = 0; i < data->num_events; i++)
255 if ((check_type && data->events[i].info->type == type &&
256 data->events[i].enabled) ||
257 (!check_type && data->events[i].enabled))
258 return true;
259
260 return false;
261 }
262
263 static int mma9553_set_config(struct mma9553_data *data, u16 reg,
264 u16 *p_reg_val, u16 val, u16 mask)
265 {
266 int ret, retries;
267 u16 reg_val, config;
268
269 reg_val = *p_reg_val;
270 if (val == mma9553_get_bits(reg_val, mask))
271 return 0;
272
273 reg_val = mma9553_set_bits(reg_val, val, mask);
274 ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
275 reg, reg_val);
276 if (ret < 0) {
277 dev_err(&data->client->dev,
278 "error writing config register 0x%x\n", reg);
279 return ret;
280 }
281
282 *p_reg_val = reg_val;
283
284 /* Reinitializes the pedometer with current configuration values */
285 config = mma9553_set_bits(data->conf.config, 1,
286 MMA9553_MASK_CONF_CONFIG);
287
288 ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
289 MMA9553_REG_CONF_CONF_STEPLEN, config);
290 if (ret < 0) {
291 dev_err(&data->client->dev,
292 "error writing config register 0x%x\n",
293 MMA9553_REG_CONF_CONF_STEPLEN);
294 return ret;
295 }
296
297 retries = MMA9553_CONFIG_RETRIES;
298 do {
299 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
300 ret = mma9551_read_config_word(data->client,
301 MMA9551_APPID_PEDOMETER,
302 MMA9553_REG_CONF_CONF_STEPLEN,
303 &config);
304 if (ret < 0)
305 return ret;
306 } while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) &&
307 --retries > 0);
308
309 return 0;
310 }
311
312 static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
313 u8 *activity, u16 *stepcnt)
314 {
315 u16 buf[2];
316 int ret;
317
318 ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
319 MMA9553_REG_STATUS, ARRAY_SIZE(buf),
320 buf);
321 if (ret < 0) {
322 dev_err(&data->client->dev,
323 "error reading status and stepcnt\n");
324 return ret;
325 }
326
327 *activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY);
328 *stepcnt = buf[1];
329
330 return 0;
331 }
332
333 static int mma9553_conf_gpio(struct mma9553_data *data)
334 {
335 u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
336 int ret;
337 struct mma9553_event *ev_step_detect;
338 bool activity_enabled;
339
340 activity_enabled = mma9553_is_any_event_enabled(data, true,
341 IIO_ACTIVITY);
342 ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
343 IIO_EV_DIR_NONE);
344
345 /*
346 * If both step detector and activity are enabled, use the MRGFL bit.
347 * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
348 */
349 if (activity_enabled && ev_step_detect->enabled)
350 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL);
351 else if (ev_step_detect->enabled)
352 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG);
353 else if (activity_enabled)
354 bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG);
355 else /* Reset */
356 appid = MMA9551_APPID_NONE;
357
358 if (data->gpio_bitnum == bitnum)
359 return 0;
360
361 /* Save initial values for activity and stepcnt */
362 if (activity_enabled || ev_step_detect->enabled) {
363 ret = mma9553_read_activity_stepcnt(data, &data->activity,
364 &data->stepcnt);
365 if (ret < 0)
366 return ret;
367 }
368
369 ret = mma9551_gpio_config(data->client, MMA9553_DEFAULT_GPIO_PIN, appid,
370 bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
371 if (ret < 0)
372 return ret;
373 data->gpio_bitnum = bitnum;
374
375 return 0;
376 }
377
378 static int mma9553_init(struct mma9553_data *data)
379 {
380 int ret;
381
382 ret = mma9551_read_version(data->client);
383 if (ret)
384 return ret;
385
386 /*
387 * Read all the pedometer configuration registers. This is used as
388 * a device identification command to differentiate the MMA9553L
389 * from the MMA9550L.
390 */
391 ret = mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
392 MMA9553_REG_CONF_SLEEPMIN,
393 sizeof(data->conf) / sizeof(u16),
394 (u16 *)&data->conf);
395 if (ret < 0) {
396 dev_err(&data->client->dev,
397 "failed to read configuration registers\n");
398 return ret;
399 }
400
401 /* Reset GPIO */
402 data->gpio_bitnum = MMA9553_MAX_BITNUM;
403 ret = mma9553_conf_gpio(data);
404 if (ret < 0)
405 return ret;
406
407 ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
408 if (ret < 0)
409 return ret;
410
411 /* Init config registers */
412 data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
413 data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
414 data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
415 data->conf.config = mma9553_set_bits(data->conf.config, 1,
416 MMA9553_MASK_CONF_CONFIG);
417 /*
418 * Clear the activity debounce counter when the activity level changes,
419 * so that the confidence level applies for any activity level.
420 */
421 data->conf.config = mma9553_set_bits(data->conf.config, 1,
422 MMA9553_MASK_CONF_ACT_DBCNTM);
423 ret = mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
424 MMA9553_REG_CONF_SLEEPMIN,
425 sizeof(data->conf) / sizeof(u16),
426 (u16 *)&data->conf);
427 if (ret < 0) {
428 dev_err(&data->client->dev,
429 "failed to write configuration registers\n");
430 return ret;
431 }
432
433 return mma9551_set_device_state(data->client, true);
434 }
435
436 static int mma9553_read_status_word(struct mma9553_data *data, u16 reg,
437 u16 *tmp)
438 {
439 bool powered_on;
440 int ret;
441
442 /*
443 * The HW only counts steps and other dependent
444 * parameters (speed, distance, calories, activity)
445 * if power is on (from enabling an event or the
446 * step counter).
447 */
448 powered_on = mma9553_is_any_event_enabled(data, false, 0) ||
449 data->stepcnt_enabled;
450 if (!powered_on) {
451 dev_err(&data->client->dev, "No channels enabled\n");
452 return -EINVAL;
453 }
454
455 mutex_lock(&data->mutex);
456 ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER,
457 reg, tmp);
458 mutex_unlock(&data->mutex);
459 return ret;
460 }
461
462 static int mma9553_read_raw(struct iio_dev *indio_dev,
463 struct iio_chan_spec const *chan,
464 int *val, int *val2, long mask)
465 {
466 struct mma9553_data *data = iio_priv(indio_dev);
467 int ret;
468 u16 tmp;
469 u8 activity;
470
471 switch (mask) {
472 case IIO_CHAN_INFO_PROCESSED:
473 switch (chan->type) {
474 case IIO_STEPS:
475 ret = mma9553_read_status_word(data,
476 MMA9553_REG_STEPCNT,
477 &tmp);
478 if (ret < 0)
479 return ret;
480 *val = tmp;
481 return IIO_VAL_INT;
482 case IIO_DISTANCE:
483 ret = mma9553_read_status_word(data,
484 MMA9553_REG_DISTANCE,
485 &tmp);
486 if (ret < 0)
487 return ret;
488 *val = tmp;
489 return IIO_VAL_INT;
490 case IIO_ACTIVITY:
491 ret = mma9553_read_status_word(data,
492 MMA9553_REG_STATUS,
493 &tmp);
494 if (ret < 0)
495 return ret;
496
497 activity =
498 mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY);
499
500 /*
501 * The device does not support confidence value levels,
502 * so we will always have 100% for current activity and
503 * 0% for the others.
504 */
505 if (chan->channel2 == mma9553_activity_to_mod(activity))
506 *val = 100;
507 else
508 *val = 0;
509 return IIO_VAL_INT;
510 default:
511 return -EINVAL;
512 }
513 case IIO_CHAN_INFO_RAW:
514 switch (chan->type) {
515 case IIO_VELOCITY: /* m/h */
516 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
517 return -EINVAL;
518 ret = mma9553_read_status_word(data,
519 MMA9553_REG_SPEED,
520 &tmp);
521 if (ret < 0)
522 return ret;
523 *val = tmp;
524 return IIO_VAL_INT;
525 case IIO_ENERGY: /* Cal or kcal */
526 ret = mma9553_read_status_word(data,
527 MMA9553_REG_CALORIES,
528 &tmp);
529 if (ret < 0)
530 return ret;
531 *val = tmp;
532 return IIO_VAL_INT;
533 case IIO_ACCEL:
534 mutex_lock(&data->mutex);
535 ret = mma9551_read_accel_chan(data->client,
536 chan, val, val2);
537 mutex_unlock(&data->mutex);
538 return ret;
539 default:
540 return -EINVAL;
541 }
542 case IIO_CHAN_INFO_SCALE:
543 switch (chan->type) {
544 case IIO_VELOCITY: /* m/h to m/s */
545 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
546 return -EINVAL;
547 *val = 0;
548 *val2 = 277; /* 0.000277 */
549 return IIO_VAL_INT_PLUS_MICRO;
550 case IIO_ENERGY: /* Cal or kcal to J */
551 *val = 4184;
552 return IIO_VAL_INT;
553 case IIO_ACCEL:
554 return mma9551_read_accel_scale(val, val2);
555 default:
556 return -EINVAL;
557 }
558 case IIO_CHAN_INFO_ENABLE:
559 *val = data->stepcnt_enabled;
560 return IIO_VAL_INT;
561 case IIO_CHAN_INFO_CALIBHEIGHT:
562 tmp = mma9553_get_bits(data->conf.height_weight,
563 MMA9553_MASK_CONF_HEIGHT);
564 *val = tmp / 100; /* cm to m */
565 *val2 = (tmp % 100) * 10000;
566 return IIO_VAL_INT_PLUS_MICRO;
567 case IIO_CHAN_INFO_CALIBWEIGHT:
568 *val = mma9553_get_bits(data->conf.height_weight,
569 MMA9553_MASK_CONF_WEIGHT);
570 return IIO_VAL_INT;
571 case IIO_CHAN_INFO_DEBOUNCE_COUNT:
572 switch (chan->type) {
573 case IIO_STEPS:
574 *val = mma9553_get_bits(data->conf.filter,
575 MMA9553_MASK_CONF_FILTSTEP);
576 return IIO_VAL_INT;
577 default:
578 return -EINVAL;
579 }
580 case IIO_CHAN_INFO_DEBOUNCE_TIME:
581 switch (chan->type) {
582 case IIO_STEPS:
583 *val = mma9553_get_bits(data->conf.filter,
584 MMA9553_MASK_CONF_FILTTIME);
585 return IIO_VAL_INT;
586 default:
587 return -EINVAL;
588 }
589 case IIO_CHAN_INFO_INT_TIME:
590 switch (chan->type) {
591 case IIO_VELOCITY:
592 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
593 return -EINVAL;
594 *val = mma9553_get_bits(data->conf.speed_step,
595 MMA9553_MASK_CONF_SPDPRD);
596 return IIO_VAL_INT;
597 default:
598 return -EINVAL;
599 }
600 default:
601 return -EINVAL;
602 }
603 }
604
605 static int mma9553_write_raw(struct iio_dev *indio_dev,
606 struct iio_chan_spec const *chan,
607 int val, int val2, long mask)
608 {
609 struct mma9553_data *data = iio_priv(indio_dev);
610 int ret, tmp;
611
612 switch (mask) {
613 case IIO_CHAN_INFO_ENABLE:
614 if (data->stepcnt_enabled == !!val)
615 return 0;
616 mutex_lock(&data->mutex);
617 ret = mma9551_set_power_state(data->client, val);
618 if (ret < 0) {
619 mutex_unlock(&data->mutex);
620 return ret;
621 }
622 data->stepcnt_enabled = val;
623 mutex_unlock(&data->mutex);
624 return 0;
625 case IIO_CHAN_INFO_CALIBHEIGHT:
626 /* m to cm */
627 tmp = val * 100 + val2 / 10000;
628 if (tmp < 0 || tmp > 255)
629 return -EINVAL;
630 mutex_lock(&data->mutex);
631 ret = mma9553_set_config(data,
632 MMA9553_REG_CONF_HEIGHT_WEIGHT,
633 &data->conf.height_weight,
634 tmp, MMA9553_MASK_CONF_HEIGHT);
635 mutex_unlock(&data->mutex);
636 return ret;
637 case IIO_CHAN_INFO_CALIBWEIGHT:
638 if (val < 0 || val > 255)
639 return -EINVAL;
640 mutex_lock(&data->mutex);
641 ret = mma9553_set_config(data,
642 MMA9553_REG_CONF_HEIGHT_WEIGHT,
643 &data->conf.height_weight,
644 val, MMA9553_MASK_CONF_WEIGHT);
645 mutex_unlock(&data->mutex);
646 return ret;
647 case IIO_CHAN_INFO_DEBOUNCE_COUNT:
648 switch (chan->type) {
649 case IIO_STEPS:
650 /*
651 * Set to 0 to disable step filtering. If the value
652 * specified is greater than 6, then 6 will be used.
653 */
654 if (val < 0)
655 return -EINVAL;
656 if (val > 6)
657 val = 6;
658 mutex_lock(&data->mutex);
659 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
660 &data->conf.filter, val,
661 MMA9553_MASK_CONF_FILTSTEP);
662 mutex_unlock(&data->mutex);
663 return ret;
664 default:
665 return -EINVAL;
666 }
667 case IIO_CHAN_INFO_DEBOUNCE_TIME:
668 switch (chan->type) {
669 case IIO_STEPS:
670 if (val < 0 || val > 127)
671 return -EINVAL;
672 mutex_lock(&data->mutex);
673 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
674 &data->conf.filter, val,
675 MMA9553_MASK_CONF_FILTTIME);
676 mutex_unlock(&data->mutex);
677 return ret;
678 default:
679 return -EINVAL;
680 }
681 case IIO_CHAN_INFO_INT_TIME:
682 switch (chan->type) {
683 case IIO_VELOCITY:
684 if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z)
685 return -EINVAL;
686 /*
687 * If set to a value greater than 5, then 5 will be
688 * used. Warning: Do not set SPDPRD to 0 or 1 as
689 * this may cause undesirable behavior.
690 */
691 if (val < 2)
692 return -EINVAL;
693 if (val > 5)
694 val = 5;
695 mutex_lock(&data->mutex);
696 ret = mma9553_set_config(data,
697 MMA9553_REG_CONF_SPEED_STEP,
698 &data->conf.speed_step, val,
699 MMA9553_MASK_CONF_SPDPRD);
700 mutex_unlock(&data->mutex);
701 return ret;
702 default:
703 return -EINVAL;
704 }
705 default:
706 return -EINVAL;
707 }
708 }
709
710 static int mma9553_read_event_config(struct iio_dev *indio_dev,
711 const struct iio_chan_spec *chan,
712 enum iio_event_type type,
713 enum iio_event_direction dir)
714 {
715 struct mma9553_data *data = iio_priv(indio_dev);
716 struct mma9553_event *event;
717
718 event = mma9553_get_event(data, chan->type, chan->channel2, dir);
719 if (!event)
720 return -EINVAL;
721
722 return event->enabled;
723 }
724
725 static int mma9553_write_event_config(struct iio_dev *indio_dev,
726 const struct iio_chan_spec *chan,
727 enum iio_event_type type,
728 enum iio_event_direction dir,
729 bool state)
730 {
731 struct mma9553_data *data = iio_priv(indio_dev);
732 struct mma9553_event *event;
733 int ret;
734
735 event = mma9553_get_event(data, chan->type, chan->channel2, dir);
736 if (!event)
737 return -EINVAL;
738
739 if (event->enabled == state)
740 return 0;
741
742 mutex_lock(&data->mutex);
743
744 ret = mma9551_set_power_state(data->client, state);
745 if (ret < 0)
746 goto err_out;
747 event->enabled = state;
748
749 ret = mma9553_conf_gpio(data);
750 if (ret < 0)
751 goto err_conf_gpio;
752
753 mutex_unlock(&data->mutex);
754
755 return 0;
756
757 err_conf_gpio:
758 if (state) {
759 event->enabled = false;
760 mma9551_set_power_state(data->client, false);
761 }
762 err_out:
763 mutex_unlock(&data->mutex);
764 return ret;
765 }
766
767 static int mma9553_read_event_value(struct iio_dev *indio_dev,
768 const struct iio_chan_spec *chan,
769 enum iio_event_type type,
770 enum iio_event_direction dir,
771 enum iio_event_info info,
772 int *val, int *val2)
773 {
774 struct mma9553_data *data = iio_priv(indio_dev);
775
776 *val2 = 0;
777 switch (info) {
778 case IIO_EV_INFO_VALUE:
779 switch (chan->type) {
780 case IIO_STEPS:
781 *val = mma9553_get_bits(data->conf.speed_step,
782 MMA9553_MASK_CONF_STEPCOALESCE);
783 return IIO_VAL_INT;
784 case IIO_ACTIVITY:
785 /*
786 * The device does not support confidence value levels.
787 * We set an average of 50%.
788 */
789 *val = 50;
790 return IIO_VAL_INT;
791 default:
792 return -EINVAL;
793 }
794 case IIO_EV_INFO_PERIOD:
795 switch (chan->type) {
796 case IIO_ACTIVITY:
797 *val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd);
798 return IIO_VAL_INT;
799 default:
800 return -EINVAL;
801 }
802 default:
803 return -EINVAL;
804 }
805 }
806
807 static int mma9553_write_event_value(struct iio_dev *indio_dev,
808 const struct iio_chan_spec *chan,
809 enum iio_event_type type,
810 enum iio_event_direction dir,
811 enum iio_event_info info,
812 int val, int val2)
813 {
814 struct mma9553_data *data = iio_priv(indio_dev);
815 int ret;
816
817 switch (info) {
818 case IIO_EV_INFO_VALUE:
819 switch (chan->type) {
820 case IIO_STEPS:
821 if (val < 0 || val > 255)
822 return -EINVAL;
823 mutex_lock(&data->mutex);
824 ret = mma9553_set_config(data,
825 MMA9553_REG_CONF_SPEED_STEP,
826 &data->conf.speed_step, val,
827 MMA9553_MASK_CONF_STEPCOALESCE);
828 mutex_unlock(&data->mutex);
829 return ret;
830 default:
831 return -EINVAL;
832 }
833 case IIO_EV_INFO_PERIOD:
834 switch (chan->type) {
835 case IIO_ACTIVITY:
836 if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC(
837 MMA9553_MAX_ACTTHD))
838 return -EINVAL;
839 mutex_lock(&data->mutex);
840 ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD,
841 &data->conf.actthd,
842 MMA9553_ACTIVITY_SEC_TO_THD
843 (val), MMA9553_MASK_CONF_WORD);
844 mutex_unlock(&data->mutex);
845 return ret;
846 default:
847 return -EINVAL;
848 }
849 default:
850 return -EINVAL;
851 }
852 }
853
854 static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev,
855 const struct iio_chan_spec *chan)
856 {
857 struct mma9553_data *data = iio_priv(indio_dev);
858 u8 gender;
859
860 gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE);
861 /*
862 * HW expects 0 for female and 1 for male,
863 * while iio index is 0 for male and 1 for female.
864 */
865 return !gender;
866 }
867
868 static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev,
869 const struct iio_chan_spec *chan,
870 unsigned int mode)
871 {
872 struct mma9553_data *data = iio_priv(indio_dev);
873 u8 gender = !mode;
874 int ret;
875
876 if ((mode != 0) && (mode != 1))
877 return -EINVAL;
878 mutex_lock(&data->mutex);
879 ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER,
880 &data->conf.filter, gender,
881 MMA9553_MASK_CONF_MALE);
882 mutex_unlock(&data->mutex);
883
884 return ret;
885 }
886
887 static const struct iio_event_spec mma9553_step_event = {
888 .type = IIO_EV_TYPE_CHANGE,
889 .dir = IIO_EV_DIR_NONE,
890 .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE),
891 };
892
893 static const struct iio_event_spec mma9553_activity_events[] = {
894 {
895 .type = IIO_EV_TYPE_THRESH,
896 .dir = IIO_EV_DIR_RISING,
897 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
898 BIT(IIO_EV_INFO_VALUE) |
899 BIT(IIO_EV_INFO_PERIOD),
900 },
901 {
902 .type = IIO_EV_TYPE_THRESH,
903 .dir = IIO_EV_DIR_FALLING,
904 .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
905 BIT(IIO_EV_INFO_VALUE) |
906 BIT(IIO_EV_INFO_PERIOD),
907 },
908 };
909
910 static const char * const mma9553_calibgender_modes[] = { "male", "female" };
911
912 static const struct iio_enum mma9553_calibgender_enum = {
913 .items = mma9553_calibgender_modes,
914 .num_items = ARRAY_SIZE(mma9553_calibgender_modes),
915 .get = mma9553_get_calibgender_mode,
916 .set = mma9553_set_calibgender_mode,
917 };
918
919 static const struct iio_chan_spec_ext_info mma9553_ext_info[] = {
920 IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
921 IIO_ENUM_AVAILABLE("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum),
922 {},
923 };
924
925 #define MMA9553_PEDOMETER_CHANNEL(_type, _mask) { \
926 .type = _type, \
927 .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE) | \
928 BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
929 _mask, \
930 .ext_info = mma9553_ext_info, \
931 }
932
933 #define MMA9553_ACTIVITY_CHANNEL(_chan2) { \
934 .type = IIO_ACTIVITY, \
935 .modified = 1, \
936 .channel2 = _chan2, \
937 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
938 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
939 BIT(IIO_CHAN_INFO_ENABLE), \
940 .event_spec = mma9553_activity_events, \
941 .num_event_specs = ARRAY_SIZE(mma9553_activity_events), \
942 .ext_info = mma9553_ext_info, \
943 }
944
945 static const struct iio_chan_spec mma9553_channels[] = {
946 MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
947 MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
948 MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
949
950 {
951 .type = IIO_STEPS,
952 .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
953 BIT(IIO_CHAN_INFO_ENABLE) |
954 BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) |
955 BIT(IIO_CHAN_INFO_DEBOUNCE_TIME),
956 .event_spec = &mma9553_step_event,
957 .num_event_specs = 1,
958 },
959
960 MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
961 {
962 .type = IIO_VELOCITY,
963 .modified = 1,
964 .channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
965 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
966 BIT(IIO_CHAN_INFO_SCALE) |
967 BIT(IIO_CHAN_INFO_INT_TIME) |
968 BIT(IIO_CHAN_INFO_ENABLE),
969 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT),
970 .ext_info = mma9553_ext_info,
971 },
972 MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) |
973 BIT(IIO_CHAN_INFO_SCALE) |
974 BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
975
976 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
977 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
978 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
979 MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
980 };
981
982 static const struct iio_info mma9553_info = {
983 .read_raw = mma9553_read_raw,
984 .write_raw = mma9553_write_raw,
985 .read_event_config = mma9553_read_event_config,
986 .write_event_config = mma9553_write_event_config,
987 .read_event_value = mma9553_read_event_value,
988 .write_event_value = mma9553_write_event_value,
989 };
990
991 static irqreturn_t mma9553_irq_handler(int irq, void *private)
992 {
993 struct iio_dev *indio_dev = private;
994 struct mma9553_data *data = iio_priv(indio_dev);
995
996 data->timestamp = iio_get_time_ns(indio_dev);
997 /*
998 * Since we only configure the interrupt pin when an
999 * event is enabled, we are sure we have at least
1000 * one event enabled at this point.
1001 */
1002 return IRQ_WAKE_THREAD;
1003 }
1004
1005 static irqreturn_t mma9553_event_handler(int irq, void *private)
1006 {
1007 struct iio_dev *indio_dev = private;
1008 struct mma9553_data *data = iio_priv(indio_dev);
1009 u16 stepcnt;
1010 u8 activity;
1011 struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
1012 int ret;
1013
1014 mutex_lock(&data->mutex);
1015 ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
1016 if (ret < 0) {
1017 mutex_unlock(&data->mutex);
1018 return IRQ_HANDLED;
1019 }
1020
1021 ev_prev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1022 mma9553_activity_to_mod(
1023 data->activity),
1024 IIO_EV_DIR_FALLING);
1025 ev_activity = mma9553_get_event(data, IIO_ACTIVITY,
1026 mma9553_activity_to_mod(activity),
1027 IIO_EV_DIR_RISING);
1028 ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD,
1029 IIO_EV_DIR_NONE);
1030
1031 if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
1032 data->stepcnt = stepcnt;
1033 iio_push_event(indio_dev,
1034 IIO_UNMOD_EVENT_CODE(IIO_STEPS, 0,
1035 IIO_EV_TYPE_CHANGE,
1036 IIO_EV_DIR_NONE),
1037 data->timestamp);
1038 }
1039
1040 if (activity != data->activity) {
1041 data->activity = activity;
1042 /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
1043 if (ev_prev_activity && ev_prev_activity->enabled)
1044 iio_push_event(indio_dev,
1045 IIO_MOD_EVENT_CODE(IIO_ACTIVITY, 0,
1046 ev_prev_activity->info->mod,
1047 IIO_EV_TYPE_THRESH,
1048 IIO_EV_DIR_FALLING),
1049 data->timestamp);
1050
1051 if (ev_activity && ev_activity->enabled)
1052 iio_push_event(indio_dev,
1053 IIO_MOD_EVENT_CODE(IIO_ACTIVITY, 0,
1054 ev_activity->info->mod,
1055 IIO_EV_TYPE_THRESH,
1056 IIO_EV_DIR_RISING),
1057 data->timestamp);
1058 }
1059 mutex_unlock(&data->mutex);
1060
1061 return IRQ_HANDLED;
1062 }
1063
1064 static int mma9553_probe(struct i2c_client *client)
1065 {
1066 const struct i2c_device_id *id = i2c_client_get_device_id(client);
1067 struct mma9553_data *data;
1068 struct iio_dev *indio_dev;
1069 const char *name = NULL;
1070 int ret;
1071
1072 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1073 if (!indio_dev)
1074 return -ENOMEM;
1075
1076 data = iio_priv(indio_dev);
1077 i2c_set_clientdata(client, indio_dev);
1078 data->client = client;
1079
1080 if (id)
1081 name = id->name;
1082 else
1083 name = iio_get_acpi_device_name(&client->dev);
1084 if (!name)
1085 return -ENOSYS;
1086
1087 mutex_init(&data->mutex);
1088 mma9553_init_events(data);
1089
1090 ret = mma9553_init(data);
1091 if (ret < 0)
1092 return ret;
1093
1094 indio_dev->channels = mma9553_channels;
1095 indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
1096 indio_dev->name = name;
1097 indio_dev->modes = INDIO_DIRECT_MODE;
1098 indio_dev->info = &mma9553_info;
1099
1100 if (client->irq > 0) {
1101 ret = devm_request_threaded_irq(&client->dev, client->irq,
1102 mma9553_irq_handler,
1103 mma9553_event_handler,
1104 IRQF_TRIGGER_RISING,
1105 MMA9553_IRQ_NAME, indio_dev);
1106 if (ret < 0) {
1107 dev_err(&client->dev, "request irq %d failed\n",
1108 client->irq);
1109 goto out_poweroff;
1110 }
1111 }
1112
1113 ret = pm_runtime_set_active(&client->dev);
1114 if (ret < 0)
1115 goto out_poweroff;
1116
1117 pm_runtime_enable(&client->dev);
1118 pm_runtime_set_autosuspend_delay(&client->dev,
1119 MMA9551_AUTO_SUSPEND_DELAY_MS);
1120 pm_runtime_use_autosuspend(&client->dev);
1121
1122 ret = iio_device_register(indio_dev);
1123 if (ret < 0) {
1124 dev_err(&client->dev, "unable to register iio device\n");
1125 goto err_pm_cleanup;
1126 }
1127
1128 dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
1129 return 0;
1130
1131 err_pm_cleanup:
1132 pm_runtime_dont_use_autosuspend(&client->dev);
1133 pm_runtime_disable(&client->dev);
1134 out_poweroff:
1135 mma9551_set_device_state(client, false);
1136 return ret;
1137 }
1138
1139 static void mma9553_remove(struct i2c_client *client)
1140 {
1141 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1142 struct mma9553_data *data = iio_priv(indio_dev);
1143
1144 iio_device_unregister(indio_dev);
1145
1146 pm_runtime_disable(&client->dev);
1147 pm_runtime_set_suspended(&client->dev);
1148
1149 mutex_lock(&data->mutex);
1150 mma9551_set_device_state(data->client, false);
1151 mutex_unlock(&data->mutex);
1152 }
1153
1154 static int mma9553_runtime_suspend(struct device *dev)
1155 {
1156 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1157 struct mma9553_data *data = iio_priv(indio_dev);
1158 int ret;
1159
1160 mutex_lock(&data->mutex);
1161 ret = mma9551_set_device_state(data->client, false);
1162 mutex_unlock(&data->mutex);
1163 if (ret < 0) {
1164 dev_err(&data->client->dev, "powering off device failed\n");
1165 return -EAGAIN;
1166 }
1167
1168 return 0;
1169 }
1170
1171 static int mma9553_runtime_resume(struct device *dev)
1172 {
1173 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1174 struct mma9553_data *data = iio_priv(indio_dev);
1175 int ret;
1176
1177 ret = mma9551_set_device_state(data->client, true);
1178 if (ret < 0)
1179 return ret;
1180
1181 mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
1182
1183 return 0;
1184 }
1185
1186 static int mma9553_suspend(struct device *dev)
1187 {
1188 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1189 struct mma9553_data *data = iio_priv(indio_dev);
1190 int ret;
1191
1192 mutex_lock(&data->mutex);
1193 ret = mma9551_set_device_state(data->client, false);
1194 mutex_unlock(&data->mutex);
1195
1196 return ret;
1197 }
1198
1199 static int mma9553_resume(struct device *dev)
1200 {
1201 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1202 struct mma9553_data *data = iio_priv(indio_dev);
1203 int ret;
1204
1205 mutex_lock(&data->mutex);
1206 ret = mma9551_set_device_state(data->client, true);
1207 mutex_unlock(&data->mutex);
1208
1209 return ret;
1210 }
1211
1212 static const struct dev_pm_ops mma9553_pm_ops = {
1213 SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
1214 RUNTIME_PM_OPS(mma9553_runtime_suspend, mma9553_runtime_resume, NULL)
1215 };
1216
1217 static const struct acpi_device_id mma9553_acpi_match[] = {
1218 {"MMA9553", 0},
1219 {},
1220 };
1221
1222 MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
1223
1224 static const struct i2c_device_id mma9553_id[] = {
1225 { "mma9553" },
1226 {}
1227 };
1228
1229 MODULE_DEVICE_TABLE(i2c, mma9553_id);
1230
1231 static struct i2c_driver mma9553_driver = {
1232 .driver = {
1233 .name = MMA9553_DRV_NAME,
1234 .acpi_match_table = mma9553_acpi_match,
1235 .pm = pm_ptr(&mma9553_pm_ops),
1236 },
1237 .probe = mma9553_probe,
1238 .remove = mma9553_remove,
1239 .id_table = mma9553_id,
1240 };
1241
1242 module_i2c_driver(mma9553_driver);
1243
1244 MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");
1245 MODULE_LICENSE("GPL v2");
1246 MODULE_DESCRIPTION("MMA9553L pedometer platform driver");
1247 MODULE_IMPORT_NS(IIO_MMA9551);
Kernel DRM miscellaneous fixes and cross-tree changes