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1/*
2 * Copyright (c) 2011 Bosch Sensortec GmbH
3 * Copyright (c) 2011 Unixphere
4 *
5 * This driver adds support for Bosch Sensortec's digital acceleration
6 * sensors BMA150 and SMB380.
7 * The SMB380 is fully compatible with BMA150 and only differs in packaging.
8 *
9 * The datasheet for the BMA150 chip can be found here:
10 * http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/i2c.h>
29#include <linux/input.h>
30#include <linux/input-polldev.h>
31#include <linux/interrupt.h>
32#include <linux/delay.h>
33#include <linux/slab.h>
34#include <linux/pm.h>
35#include <linux/pm_runtime.h>
36#include <linux/bma150.h>
37
38#define ABSMAX_ACC_VAL 0x01FF
39#define ABSMIN_ACC_VAL -(ABSMAX_ACC_VAL)
40
41/* Each axis is represented by a 2-byte data word */
42#define BMA150_XYZ_DATA_SIZE 6
43
44/* Input poll interval in milliseconds */
45#define BMA150_POLL_INTERVAL 10
46#define BMA150_POLL_MAX 200
47#define BMA150_POLL_MIN 0
48
49#define BMA150_MODE_NORMAL 0
50#define BMA150_MODE_SLEEP 2
51#define BMA150_MODE_WAKE_UP 3
52
53/* Data register addresses */
54#define BMA150_DATA_0_REG 0x00
55#define BMA150_DATA_1_REG 0x01
56#define BMA150_DATA_2_REG 0x02
57
58/* Control register addresses */
59#define BMA150_CTRL_0_REG 0x0A
60#define BMA150_CTRL_1_REG 0x0B
61#define BMA150_CTRL_2_REG 0x14
62#define BMA150_CTRL_3_REG 0x15
63
64/* Configuration/Setting register addresses */
65#define BMA150_CFG_0_REG 0x0C
66#define BMA150_CFG_1_REG 0x0D
67#define BMA150_CFG_2_REG 0x0E
68#define BMA150_CFG_3_REG 0x0F
69#define BMA150_CFG_4_REG 0x10
70#define BMA150_CFG_5_REG 0x11
71
72#define BMA150_CHIP_ID 2
73#define BMA180_CHIP_ID 3
74#define BMA150_CHIP_ID_REG BMA150_DATA_0_REG
75
76#define BMA150_ACC_X_LSB_REG BMA150_DATA_2_REG
77
78#define BMA150_SLEEP_POS 0
79#define BMA150_SLEEP_MSK 0x01
80#define BMA150_SLEEP_REG BMA150_CTRL_0_REG
81
82#define BMA150_BANDWIDTH_POS 0
83#define BMA150_BANDWIDTH_MSK 0x07
84#define BMA150_BANDWIDTH_REG BMA150_CTRL_2_REG
85
86#define BMA150_RANGE_POS 3
87#define BMA150_RANGE_MSK 0x18
88#define BMA150_RANGE_REG BMA150_CTRL_2_REG
89
90#define BMA150_WAKE_UP_POS 0
91#define BMA150_WAKE_UP_MSK 0x01
92#define BMA150_WAKE_UP_REG BMA150_CTRL_3_REG
93
94#define BMA150_SW_RES_POS 1
95#define BMA150_SW_RES_MSK 0x02
96#define BMA150_SW_RES_REG BMA150_CTRL_0_REG
97
98/* Any-motion interrupt register fields */
99#define BMA150_ANY_MOTION_EN_POS 6
100#define BMA150_ANY_MOTION_EN_MSK 0x40
101#define BMA150_ANY_MOTION_EN_REG BMA150_CTRL_1_REG
102
103#define BMA150_ANY_MOTION_DUR_POS 6
104#define BMA150_ANY_MOTION_DUR_MSK 0xC0
105#define BMA150_ANY_MOTION_DUR_REG BMA150_CFG_5_REG
106
107#define BMA150_ANY_MOTION_THRES_REG BMA150_CFG_4_REG
108
109/* Advanced interrupt register fields */
110#define BMA150_ADV_INT_EN_POS 6
111#define BMA150_ADV_INT_EN_MSK 0x40
112#define BMA150_ADV_INT_EN_REG BMA150_CTRL_3_REG
113
114/* High-G interrupt register fields */
115#define BMA150_HIGH_G_EN_POS 1
116#define BMA150_HIGH_G_EN_MSK 0x02
117#define BMA150_HIGH_G_EN_REG BMA150_CTRL_1_REG
118
119#define BMA150_HIGH_G_HYST_POS 3
120#define BMA150_HIGH_G_HYST_MSK 0x38
121#define BMA150_HIGH_G_HYST_REG BMA150_CFG_5_REG
122
123#define BMA150_HIGH_G_DUR_REG BMA150_CFG_3_REG
124#define BMA150_HIGH_G_THRES_REG BMA150_CFG_2_REG
125
126/* Low-G interrupt register fields */
127#define BMA150_LOW_G_EN_POS 0
128#define BMA150_LOW_G_EN_MSK 0x01
129#define BMA150_LOW_G_EN_REG BMA150_CTRL_1_REG
130
131#define BMA150_LOW_G_HYST_POS 0
132#define BMA150_LOW_G_HYST_MSK 0x07
133#define BMA150_LOW_G_HYST_REG BMA150_CFG_5_REG
134
135#define BMA150_LOW_G_DUR_REG BMA150_CFG_1_REG
136#define BMA150_LOW_G_THRES_REG BMA150_CFG_0_REG
137
138struct bma150_data {
139 struct i2c_client *client;
140 struct input_polled_dev *input_polled;
141 struct input_dev *input;
142 u8 mode;
143};
144
145/*
146 * The settings for the given range, bandwidth and interrupt features
147 * are stated and verified by Bosch Sensortec where they are configured
148 * to provide a generic sensitivity performance.
149 */
150static const struct bma150_cfg default_cfg = {
151 .any_motion_int = 1,
152 .hg_int = 1,
153 .lg_int = 1,
154 .any_motion_dur = 0,
155 .any_motion_thres = 0,
156 .hg_hyst = 0,
157 .hg_dur = 150,
158 .hg_thres = 160,
159 .lg_hyst = 0,
160 .lg_dur = 150,
161 .lg_thres = 20,
162 .range = BMA150_RANGE_2G,
163 .bandwidth = BMA150_BW_50HZ
164};
165
166static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
167{
168 s32 ret;
169
170 /* As per specification, disable irq in between register writes */
171 if (client->irq)
172 disable_irq_nosync(client->irq);
173
174 ret = i2c_smbus_write_byte_data(client, reg, val);
175
176 if (client->irq)
177 enable_irq(client->irq);
178
179 return ret;
180}
181
182static int bma150_set_reg_bits(struct i2c_client *client,
183 int val, int shift, u8 mask, u8 reg)
184{
185 int data;
186
187 data = i2c_smbus_read_byte_data(client, reg);
188 if (data < 0)
189 return data;
190
191 data = (data & ~mask) | ((val << shift) & mask);
192 return bma150_write_byte(client, reg, data);
193}
194
195static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
196{
197 int error;
198
199 error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
200 BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
201 if (error)
202 return error;
203
204 error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
205 BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
206 if (error)
207 return error;
208
209 if (mode == BMA150_MODE_NORMAL)
210 msleep(2);
211
212 bma150->mode = mode;
213 return 0;
214}
215
216static int bma150_soft_reset(struct bma150_data *bma150)
217{
218 int error;
219
220 error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
221 BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
222 if (error)
223 return error;
224
225 msleep(2);
226 return 0;
227}
228
229static int bma150_set_range(struct bma150_data *bma150, u8 range)
230{
231 return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
232 BMA150_RANGE_MSK, BMA150_RANGE_REG);
233}
234
235static int bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
236{
237 return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
238 BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
239}
240
241static int bma150_set_low_g_interrupt(struct bma150_data *bma150,
242 u8 enable, u8 hyst, u8 dur, u8 thres)
243{
244 int error;
245
246 error = bma150_set_reg_bits(bma150->client, hyst,
247 BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
248 BMA150_LOW_G_HYST_REG);
249 if (error)
250 return error;
251
252 error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
253 if (error)
254 return error;
255
256 error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
257 if (error)
258 return error;
259
260 return bma150_set_reg_bits(bma150->client, !!enable,
261 BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
262 BMA150_LOW_G_EN_REG);
263}
264
265static int bma150_set_high_g_interrupt(struct bma150_data *bma150,
266 u8 enable, u8 hyst, u8 dur, u8 thres)
267{
268 int error;
269
270 error = bma150_set_reg_bits(bma150->client, hyst,
271 BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
272 BMA150_HIGH_G_HYST_REG);
273 if (error)
274 return error;
275
276 error = bma150_write_byte(bma150->client,
277 BMA150_HIGH_G_DUR_REG, dur);
278 if (error)
279 return error;
280
281 error = bma150_write_byte(bma150->client,
282 BMA150_HIGH_G_THRES_REG, thres);
283 if (error)
284 return error;
285
286 return bma150_set_reg_bits(bma150->client, !!enable,
287 BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
288 BMA150_HIGH_G_EN_REG);
289}
290
291
292static int bma150_set_any_motion_interrupt(struct bma150_data *bma150,
293 u8 enable, u8 dur, u8 thres)
294{
295 int error;
296
297 error = bma150_set_reg_bits(bma150->client, dur,
298 BMA150_ANY_MOTION_DUR_POS,
299 BMA150_ANY_MOTION_DUR_MSK,
300 BMA150_ANY_MOTION_DUR_REG);
301 if (error)
302 return error;
303
304 error = bma150_write_byte(bma150->client,
305 BMA150_ANY_MOTION_THRES_REG, thres);
306 if (error)
307 return error;
308
309 error = bma150_set_reg_bits(bma150->client, !!enable,
310 BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
311 BMA150_ADV_INT_EN_REG);
312 if (error)
313 return error;
314
315 return bma150_set_reg_bits(bma150->client, !!enable,
316 BMA150_ANY_MOTION_EN_POS,
317 BMA150_ANY_MOTION_EN_MSK,
318 BMA150_ANY_MOTION_EN_REG);
319}
320
321static void bma150_report_xyz(struct bma150_data *bma150)
322{
323 u8 data[BMA150_XYZ_DATA_SIZE];
324 s16 x, y, z;
325 s32 ret;
326
327 ret = i2c_smbus_read_i2c_block_data(bma150->client,
328 BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
329 if (ret != BMA150_XYZ_DATA_SIZE)
330 return;
331
332 x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
333 y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
334 z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
335
336 x = sign_extend32(x, 9);
337 y = sign_extend32(y, 9);
338 z = sign_extend32(z, 9);
339
340 input_report_abs(bma150->input, ABS_X, x);
341 input_report_abs(bma150->input, ABS_Y, y);
342 input_report_abs(bma150->input, ABS_Z, z);
343 input_sync(bma150->input);
344}
345
346static irqreturn_t bma150_irq_thread(int irq, void *dev)
347{
348 bma150_report_xyz(dev);
349
350 return IRQ_HANDLED;
351}
352
353static void bma150_poll(struct input_polled_dev *dev)
354{
355 bma150_report_xyz(dev->private);
356}
357
358static int bma150_open(struct bma150_data *bma150)
359{
360 int error;
361
362 error = pm_runtime_get_sync(&bma150->client->dev);
363 if (error < 0 && error != -ENOSYS)
364 return error;
365
366 /*
367 * See if runtime PM woke up the device. If runtime PM
368 * is disabled we need to do it ourselves.
369 */
370 if (bma150->mode != BMA150_MODE_NORMAL) {
371 error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
372 if (error)
373 return error;
374 }
375
376 return 0;
377}
378
379static void bma150_close(struct bma150_data *bma150)
380{
381 pm_runtime_put_sync(&bma150->client->dev);
382
383 if (bma150->mode != BMA150_MODE_SLEEP)
384 bma150_set_mode(bma150, BMA150_MODE_SLEEP);
385}
386
387static int bma150_irq_open(struct input_dev *input)
388{
389 struct bma150_data *bma150 = input_get_drvdata(input);
390
391 return bma150_open(bma150);
392}
393
394static void bma150_irq_close(struct input_dev *input)
395{
396 struct bma150_data *bma150 = input_get_drvdata(input);
397
398 bma150_close(bma150);
399}
400
401static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
402{
403 struct bma150_data *bma150 = ipoll_dev->private;
404
405 bma150_open(bma150);
406}
407
408static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
409{
410 struct bma150_data *bma150 = ipoll_dev->private;
411
412 bma150_close(bma150);
413}
414
415static int bma150_initialize(struct bma150_data *bma150,
416 const struct bma150_cfg *cfg)
417{
418 int error;
419
420 error = bma150_soft_reset(bma150);
421 if (error)
422 return error;
423
424 error = bma150_set_bandwidth(bma150, cfg->bandwidth);
425 if (error)
426 return error;
427
428 error = bma150_set_range(bma150, cfg->range);
429 if (error)
430 return error;
431
432 if (bma150->client->irq) {
433 error = bma150_set_any_motion_interrupt(bma150,
434 cfg->any_motion_int,
435 cfg->any_motion_dur,
436 cfg->any_motion_thres);
437 if (error)
438 return error;
439
440 error = bma150_set_high_g_interrupt(bma150,
441 cfg->hg_int, cfg->hg_hyst,
442 cfg->hg_dur, cfg->hg_thres);
443 if (error)
444 return error;
445
446 error = bma150_set_low_g_interrupt(bma150,
447 cfg->lg_int, cfg->lg_hyst,
448 cfg->lg_dur, cfg->lg_thres);
449 if (error)
450 return error;
451 }
452
453 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
454}
455
456static void bma150_init_input_device(struct bma150_data *bma150,
457 struct input_dev *idev)
458{
459 idev->name = BMA150_DRIVER;
460 idev->phys = BMA150_DRIVER "/input0";
461 idev->id.bustype = BUS_I2C;
462 idev->dev.parent = &bma150->client->dev;
463
464 idev->evbit[0] = BIT_MASK(EV_ABS);
465 input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
466 input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
467 input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
468}
469
470static int bma150_register_input_device(struct bma150_data *bma150)
471{
472 struct input_dev *idev;
473 int error;
474
475 idev = input_allocate_device();
476 if (!idev)
477 return -ENOMEM;
478
479 bma150_init_input_device(bma150, idev);
480
481 idev->open = bma150_irq_open;
482 idev->close = bma150_irq_close;
483 input_set_drvdata(idev, bma150);
484
485 error = input_register_device(idev);
486 if (error) {
487 input_free_device(idev);
488 return error;
489 }
490
491 bma150->input = idev;
492 return 0;
493}
494
495static int bma150_register_polled_device(struct bma150_data *bma150)
496{
497 struct input_polled_dev *ipoll_dev;
498 int error;
499
500 ipoll_dev = input_allocate_polled_device();
501 if (!ipoll_dev)
502 return -ENOMEM;
503
504 ipoll_dev->private = bma150;
505 ipoll_dev->open = bma150_poll_open;
506 ipoll_dev->close = bma150_poll_close;
507 ipoll_dev->poll = bma150_poll;
508 ipoll_dev->poll_interval = BMA150_POLL_INTERVAL;
509 ipoll_dev->poll_interval_min = BMA150_POLL_MIN;
510 ipoll_dev->poll_interval_max = BMA150_POLL_MAX;
511
512 bma150_init_input_device(bma150, ipoll_dev->input);
513
514 error = input_register_polled_device(ipoll_dev);
515 if (error) {
516 input_free_polled_device(ipoll_dev);
517 return error;
518 }
519
520 bma150->input_polled = ipoll_dev;
521 bma150->input = ipoll_dev->input;
522
523 return 0;
524}
525
526static int bma150_probe(struct i2c_client *client,
527 const struct i2c_device_id *id)
528{
529 const struct bma150_platform_data *pdata =
530 dev_get_platdata(&client->dev);
531 const struct bma150_cfg *cfg;
532 struct bma150_data *bma150;
533 int chip_id;
534 int error;
535
536 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
537 dev_err(&client->dev, "i2c_check_functionality error\n");
538 return -EIO;
539 }
540
541 chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
542 if (chip_id != BMA150_CHIP_ID && chip_id != BMA180_CHIP_ID) {
543 dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
544 return -EINVAL;
545 }
546
547 bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
548 if (!bma150)
549 return -ENOMEM;
550
551 bma150->client = client;
552
553 if (pdata) {
554 if (pdata->irq_gpio_cfg) {
555 error = pdata->irq_gpio_cfg();
556 if (error) {
557 dev_err(&client->dev,
558 "IRQ GPIO conf. error %d, error %d\n",
559 client->irq, error);
560 goto err_free_mem;
561 }
562 }
563 cfg = &pdata->cfg;
564 } else {
565 cfg = &default_cfg;
566 }
567
568 error = bma150_initialize(bma150, cfg);
569 if (error)
570 goto err_free_mem;
571
572 if (client->irq > 0) {
573 error = bma150_register_input_device(bma150);
574 if (error)
575 goto err_free_mem;
576
577 error = request_threaded_irq(client->irq,
578 NULL, bma150_irq_thread,
579 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
580 BMA150_DRIVER, bma150);
581 if (error) {
582 dev_err(&client->dev,
583 "irq request failed %d, error %d\n",
584 client->irq, error);
585 input_unregister_device(bma150->input);
586 goto err_free_mem;
587 }
588 } else {
589 error = bma150_register_polled_device(bma150);
590 if (error)
591 goto err_free_mem;
592 }
593
594 i2c_set_clientdata(client, bma150);
595
596 pm_runtime_enable(&client->dev);
597
598 return 0;
599
600err_free_mem:
601 kfree(bma150);
602 return error;
603}
604
605static int bma150_remove(struct i2c_client *client)
606{
607 struct bma150_data *bma150 = i2c_get_clientdata(client);
608
609 pm_runtime_disable(&client->dev);
610
611 if (client->irq > 0) {
612 free_irq(client->irq, bma150);
613 input_unregister_device(bma150->input);
614 } else {
615 input_unregister_polled_device(bma150->input_polled);
616 input_free_polled_device(bma150->input_polled);
617 }
618
619 kfree(bma150);
620
621 return 0;
622}
623
624#ifdef CONFIG_PM
625static int bma150_suspend(struct device *dev)
626{
627 struct i2c_client *client = to_i2c_client(dev);
628 struct bma150_data *bma150 = i2c_get_clientdata(client);
629
630 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
631}
632
633static int bma150_resume(struct device *dev)
634{
635 struct i2c_client *client = to_i2c_client(dev);
636 struct bma150_data *bma150 = i2c_get_clientdata(client);
637
638 return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
639}
640#endif
641
642static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
643
644static const struct i2c_device_id bma150_id[] = {
645 { "bma150", 0 },
646 { "bma180", 0 },
647 { "smb380", 0 },
648 { "bma023", 0 },
649 { }
650};
651
652MODULE_DEVICE_TABLE(i2c, bma150_id);
653
654static struct i2c_driver bma150_driver = {
655 .driver = {
656 .name = BMA150_DRIVER,
657 .pm = &bma150_pm,
658 },
659 .class = I2C_CLASS_HWMON,
660 .id_table = bma150_id,
661 .probe = bma150_probe,
662 .remove = bma150_remove,
663};
664
665module_i2c_driver(bma150_driver);
666
667MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
668MODULE_DESCRIPTION("BMA150 driver");
669MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2011 Bosch Sensortec GmbH
4 * Copyright (c) 2011 Unixphere
5 *
6 * This driver adds support for Bosch Sensortec's digital acceleration
7 * sensors BMA150 and SMB380.
8 * The SMB380 is fully compatible with BMA150 and only differs in packaging.
9 *
10 * The datasheet for the BMA150 chip can be found here:
11 * http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
12 */
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/i2c.h>
16#include <linux/input.h>
17#include <linux/interrupt.h>
18#include <linux/delay.h>
19#include <linux/slab.h>
20#include <linux/pm.h>
21#include <linux/pm_runtime.h>
22#include <linux/bma150.h>
23
24#define ABSMAX_ACC_VAL 0x01FF
25#define ABSMIN_ACC_VAL -(ABSMAX_ACC_VAL)
26
27/* Each axis is represented by a 2-byte data word */
28#define BMA150_XYZ_DATA_SIZE 6
29
30/* Input poll interval in milliseconds */
31#define BMA150_POLL_INTERVAL 10
32#define BMA150_POLL_MAX 200
33#define BMA150_POLL_MIN 0
34
35#define BMA150_MODE_NORMAL 0
36#define BMA150_MODE_SLEEP 2
37#define BMA150_MODE_WAKE_UP 3
38
39/* Data register addresses */
40#define BMA150_DATA_0_REG 0x00
41#define BMA150_DATA_1_REG 0x01
42#define BMA150_DATA_2_REG 0x02
43
44/* Control register addresses */
45#define BMA150_CTRL_0_REG 0x0A
46#define BMA150_CTRL_1_REG 0x0B
47#define BMA150_CTRL_2_REG 0x14
48#define BMA150_CTRL_3_REG 0x15
49
50/* Configuration/Setting register addresses */
51#define BMA150_CFG_0_REG 0x0C
52#define BMA150_CFG_1_REG 0x0D
53#define BMA150_CFG_2_REG 0x0E
54#define BMA150_CFG_3_REG 0x0F
55#define BMA150_CFG_4_REG 0x10
56#define BMA150_CFG_5_REG 0x11
57
58#define BMA150_CHIP_ID 2
59#define BMA150_CHIP_ID_REG BMA150_DATA_0_REG
60
61#define BMA150_ACC_X_LSB_REG BMA150_DATA_2_REG
62
63#define BMA150_SLEEP_POS 0
64#define BMA150_SLEEP_MSK 0x01
65#define BMA150_SLEEP_REG BMA150_CTRL_0_REG
66
67#define BMA150_BANDWIDTH_POS 0
68#define BMA150_BANDWIDTH_MSK 0x07
69#define BMA150_BANDWIDTH_REG BMA150_CTRL_2_REG
70
71#define BMA150_RANGE_POS 3
72#define BMA150_RANGE_MSK 0x18
73#define BMA150_RANGE_REG BMA150_CTRL_2_REG
74
75#define BMA150_WAKE_UP_POS 0
76#define BMA150_WAKE_UP_MSK 0x01
77#define BMA150_WAKE_UP_REG BMA150_CTRL_3_REG
78
79#define BMA150_SW_RES_POS 1
80#define BMA150_SW_RES_MSK 0x02
81#define BMA150_SW_RES_REG BMA150_CTRL_0_REG
82
83/* Any-motion interrupt register fields */
84#define BMA150_ANY_MOTION_EN_POS 6
85#define BMA150_ANY_MOTION_EN_MSK 0x40
86#define BMA150_ANY_MOTION_EN_REG BMA150_CTRL_1_REG
87
88#define BMA150_ANY_MOTION_DUR_POS 6
89#define BMA150_ANY_MOTION_DUR_MSK 0xC0
90#define BMA150_ANY_MOTION_DUR_REG BMA150_CFG_5_REG
91
92#define BMA150_ANY_MOTION_THRES_REG BMA150_CFG_4_REG
93
94/* Advanced interrupt register fields */
95#define BMA150_ADV_INT_EN_POS 6
96#define BMA150_ADV_INT_EN_MSK 0x40
97#define BMA150_ADV_INT_EN_REG BMA150_CTRL_3_REG
98
99/* High-G interrupt register fields */
100#define BMA150_HIGH_G_EN_POS 1
101#define BMA150_HIGH_G_EN_MSK 0x02
102#define BMA150_HIGH_G_EN_REG BMA150_CTRL_1_REG
103
104#define BMA150_HIGH_G_HYST_POS 3
105#define BMA150_HIGH_G_HYST_MSK 0x38
106#define BMA150_HIGH_G_HYST_REG BMA150_CFG_5_REG
107
108#define BMA150_HIGH_G_DUR_REG BMA150_CFG_3_REG
109#define BMA150_HIGH_G_THRES_REG BMA150_CFG_2_REG
110
111/* Low-G interrupt register fields */
112#define BMA150_LOW_G_EN_POS 0
113#define BMA150_LOW_G_EN_MSK 0x01
114#define BMA150_LOW_G_EN_REG BMA150_CTRL_1_REG
115
116#define BMA150_LOW_G_HYST_POS 0
117#define BMA150_LOW_G_HYST_MSK 0x07
118#define BMA150_LOW_G_HYST_REG BMA150_CFG_5_REG
119
120#define BMA150_LOW_G_DUR_REG BMA150_CFG_1_REG
121#define BMA150_LOW_G_THRES_REG BMA150_CFG_0_REG
122
123struct bma150_data {
124 struct i2c_client *client;
125 struct input_dev *input;
126 u8 mode;
127};
128
129/*
130 * The settings for the given range, bandwidth and interrupt features
131 * are stated and verified by Bosch Sensortec where they are configured
132 * to provide a generic sensitivity performance.
133 */
134static const struct bma150_cfg default_cfg = {
135 .any_motion_int = 1,
136 .hg_int = 1,
137 .lg_int = 1,
138 .any_motion_dur = 0,
139 .any_motion_thres = 0,
140 .hg_hyst = 0,
141 .hg_dur = 150,
142 .hg_thres = 160,
143 .lg_hyst = 0,
144 .lg_dur = 150,
145 .lg_thres = 20,
146 .range = BMA150_RANGE_2G,
147 .bandwidth = BMA150_BW_50HZ
148};
149
150static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
151{
152 s32 ret;
153
154 /* As per specification, disable irq in between register writes */
155 if (client->irq)
156 disable_irq_nosync(client->irq);
157
158 ret = i2c_smbus_write_byte_data(client, reg, val);
159
160 if (client->irq)
161 enable_irq(client->irq);
162
163 return ret;
164}
165
166static int bma150_set_reg_bits(struct i2c_client *client,
167 int val, int shift, u8 mask, u8 reg)
168{
169 int data;
170
171 data = i2c_smbus_read_byte_data(client, reg);
172 if (data < 0)
173 return data;
174
175 data = (data & ~mask) | ((val << shift) & mask);
176 return bma150_write_byte(client, reg, data);
177}
178
179static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
180{
181 int error;
182
183 error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
184 BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
185 if (error)
186 return error;
187
188 error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
189 BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
190 if (error)
191 return error;
192
193 if (mode == BMA150_MODE_NORMAL)
194 usleep_range(2000, 2100);
195
196 bma150->mode = mode;
197 return 0;
198}
199
200static int bma150_soft_reset(struct bma150_data *bma150)
201{
202 int error;
203
204 error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
205 BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
206 if (error)
207 return error;
208
209 usleep_range(2000, 2100);
210 return 0;
211}
212
213static int bma150_set_range(struct bma150_data *bma150, u8 range)
214{
215 return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
216 BMA150_RANGE_MSK, BMA150_RANGE_REG);
217}
218
219static int bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
220{
221 return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
222 BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
223}
224
225static int bma150_set_low_g_interrupt(struct bma150_data *bma150,
226 u8 enable, u8 hyst, u8 dur, u8 thres)
227{
228 int error;
229
230 error = bma150_set_reg_bits(bma150->client, hyst,
231 BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
232 BMA150_LOW_G_HYST_REG);
233 if (error)
234 return error;
235
236 error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
237 if (error)
238 return error;
239
240 error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
241 if (error)
242 return error;
243
244 return bma150_set_reg_bits(bma150->client, !!enable,
245 BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
246 BMA150_LOW_G_EN_REG);
247}
248
249static int bma150_set_high_g_interrupt(struct bma150_data *bma150,
250 u8 enable, u8 hyst, u8 dur, u8 thres)
251{
252 int error;
253
254 error = bma150_set_reg_bits(bma150->client, hyst,
255 BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
256 BMA150_HIGH_G_HYST_REG);
257 if (error)
258 return error;
259
260 error = bma150_write_byte(bma150->client,
261 BMA150_HIGH_G_DUR_REG, dur);
262 if (error)
263 return error;
264
265 error = bma150_write_byte(bma150->client,
266 BMA150_HIGH_G_THRES_REG, thres);
267 if (error)
268 return error;
269
270 return bma150_set_reg_bits(bma150->client, !!enable,
271 BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
272 BMA150_HIGH_G_EN_REG);
273}
274
275
276static int bma150_set_any_motion_interrupt(struct bma150_data *bma150,
277 u8 enable, u8 dur, u8 thres)
278{
279 int error;
280
281 error = bma150_set_reg_bits(bma150->client, dur,
282 BMA150_ANY_MOTION_DUR_POS,
283 BMA150_ANY_MOTION_DUR_MSK,
284 BMA150_ANY_MOTION_DUR_REG);
285 if (error)
286 return error;
287
288 error = bma150_write_byte(bma150->client,
289 BMA150_ANY_MOTION_THRES_REG, thres);
290 if (error)
291 return error;
292
293 error = bma150_set_reg_bits(bma150->client, !!enable,
294 BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
295 BMA150_ADV_INT_EN_REG);
296 if (error)
297 return error;
298
299 return bma150_set_reg_bits(bma150->client, !!enable,
300 BMA150_ANY_MOTION_EN_POS,
301 BMA150_ANY_MOTION_EN_MSK,
302 BMA150_ANY_MOTION_EN_REG);
303}
304
305static void bma150_report_xyz(struct bma150_data *bma150)
306{
307 u8 data[BMA150_XYZ_DATA_SIZE];
308 s16 x, y, z;
309 s32 ret;
310
311 ret = i2c_smbus_read_i2c_block_data(bma150->client,
312 BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
313 if (ret != BMA150_XYZ_DATA_SIZE)
314 return;
315
316 x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
317 y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
318 z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
319
320 x = sign_extend32(x, 9);
321 y = sign_extend32(y, 9);
322 z = sign_extend32(z, 9);
323
324 input_report_abs(bma150->input, ABS_X, x);
325 input_report_abs(bma150->input, ABS_Y, y);
326 input_report_abs(bma150->input, ABS_Z, z);
327 input_sync(bma150->input);
328}
329
330static irqreturn_t bma150_irq_thread(int irq, void *dev)
331{
332 bma150_report_xyz(dev);
333
334 return IRQ_HANDLED;
335}
336
337static void bma150_poll(struct input_dev *input)
338{
339 struct bma150_data *bma150 = input_get_drvdata(input);
340
341 bma150_report_xyz(bma150);
342}
343
344static int bma150_open(struct input_dev *input)
345{
346 struct bma150_data *bma150 = input_get_drvdata(input);
347 int error;
348
349 error = pm_runtime_get_sync(&bma150->client->dev);
350 if (error < 0 && error != -ENOSYS)
351 return error;
352
353 /*
354 * See if runtime PM woke up the device. If runtime PM
355 * is disabled we need to do it ourselves.
356 */
357 if (bma150->mode != BMA150_MODE_NORMAL) {
358 error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
359 if (error)
360 return error;
361 }
362
363 return 0;
364}
365
366static void bma150_close(struct input_dev *input)
367{
368 struct bma150_data *bma150 = input_get_drvdata(input);
369
370 pm_runtime_put_sync(&bma150->client->dev);
371
372 if (bma150->mode != BMA150_MODE_SLEEP)
373 bma150_set_mode(bma150, BMA150_MODE_SLEEP);
374}
375
376static int bma150_initialize(struct bma150_data *bma150,
377 const struct bma150_cfg *cfg)
378{
379 int error;
380
381 error = bma150_soft_reset(bma150);
382 if (error)
383 return error;
384
385 error = bma150_set_bandwidth(bma150, cfg->bandwidth);
386 if (error)
387 return error;
388
389 error = bma150_set_range(bma150, cfg->range);
390 if (error)
391 return error;
392
393 if (bma150->client->irq) {
394 error = bma150_set_any_motion_interrupt(bma150,
395 cfg->any_motion_int,
396 cfg->any_motion_dur,
397 cfg->any_motion_thres);
398 if (error)
399 return error;
400
401 error = bma150_set_high_g_interrupt(bma150,
402 cfg->hg_int, cfg->hg_hyst,
403 cfg->hg_dur, cfg->hg_thres);
404 if (error)
405 return error;
406
407 error = bma150_set_low_g_interrupt(bma150,
408 cfg->lg_int, cfg->lg_hyst,
409 cfg->lg_dur, cfg->lg_thres);
410 if (error)
411 return error;
412 }
413
414 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
415}
416
417static int bma150_probe(struct i2c_client *client)
418{
419 const struct bma150_platform_data *pdata =
420 dev_get_platdata(&client->dev);
421 const struct bma150_cfg *cfg;
422 struct bma150_data *bma150;
423 struct input_dev *idev;
424 int chip_id;
425 int error;
426
427 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
428 dev_err(&client->dev, "i2c_check_functionality error\n");
429 return -EIO;
430 }
431
432 chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
433 if (chip_id != BMA150_CHIP_ID) {
434 dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
435 return -EINVAL;
436 }
437
438 bma150 = devm_kzalloc(&client->dev, sizeof(*bma150), GFP_KERNEL);
439 if (!bma150)
440 return -ENOMEM;
441
442 bma150->client = client;
443
444 if (pdata) {
445 if (pdata->irq_gpio_cfg) {
446 error = pdata->irq_gpio_cfg();
447 if (error) {
448 dev_err(&client->dev,
449 "IRQ GPIO conf. error %d, error %d\n",
450 client->irq, error);
451 return error;
452 }
453 }
454 cfg = &pdata->cfg;
455 } else {
456 cfg = &default_cfg;
457 }
458
459 error = bma150_initialize(bma150, cfg);
460 if (error)
461 return error;
462
463 idev = devm_input_allocate_device(&bma150->client->dev);
464 if (!idev)
465 return -ENOMEM;
466
467 input_set_drvdata(idev, bma150);
468 bma150->input = idev;
469
470 idev->name = BMA150_DRIVER;
471 idev->phys = BMA150_DRIVER "/input0";
472 idev->id.bustype = BUS_I2C;
473
474 idev->open = bma150_open;
475 idev->close = bma150_close;
476
477 input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
478 input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
479 input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
480
481 if (client->irq <= 0) {
482 error = input_setup_polling(idev, bma150_poll);
483 if (error)
484 return error;
485
486 input_set_poll_interval(idev, BMA150_POLL_INTERVAL);
487 input_set_min_poll_interval(idev, BMA150_POLL_MIN);
488 input_set_max_poll_interval(idev, BMA150_POLL_MAX);
489 }
490
491 error = input_register_device(idev);
492 if (error)
493 return error;
494
495 if (client->irq > 0) {
496 error = devm_request_threaded_irq(&client->dev, client->irq,
497 NULL, bma150_irq_thread,
498 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
499 BMA150_DRIVER, bma150);
500 if (error) {
501 dev_err(&client->dev,
502 "irq request failed %d, error %d\n",
503 client->irq, error);
504 return error;
505 }
506 }
507
508 i2c_set_clientdata(client, bma150);
509
510 pm_runtime_enable(&client->dev);
511
512 return 0;
513}
514
515static void bma150_remove(struct i2c_client *client)
516{
517 pm_runtime_disable(&client->dev);
518}
519
520static int __maybe_unused bma150_suspend(struct device *dev)
521{
522 struct i2c_client *client = to_i2c_client(dev);
523 struct bma150_data *bma150 = i2c_get_clientdata(client);
524
525 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
526}
527
528static int __maybe_unused bma150_resume(struct device *dev)
529{
530 struct i2c_client *client = to_i2c_client(dev);
531 struct bma150_data *bma150 = i2c_get_clientdata(client);
532
533 return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
534}
535
536static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
537
538static const struct i2c_device_id bma150_id[] = {
539 { "bma150", 0 },
540 { "smb380", 0 },
541 { "bma023", 0 },
542 { }
543};
544
545MODULE_DEVICE_TABLE(i2c, bma150_id);
546
547static struct i2c_driver bma150_driver = {
548 .driver = {
549 .name = BMA150_DRIVER,
550 .pm = &bma150_pm,
551 },
552 .class = I2C_CLASS_HWMON,
553 .id_table = bma150_id,
554 .probe = bma150_probe,
555 .remove = bma150_remove,
556};
557
558module_i2c_driver(bma150_driver);
559
560MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
561MODULE_DESCRIPTION("BMA150 driver");
562MODULE_LICENSE("GPL");