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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
42#define BMA150_XYZ_DATA_SIZE 6
43
44
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
54#define BMA150_DATA_0_REG 0x00
55#define BMA150_DATA_1_REG 0x01
56#define BMA150_DATA_2_REG 0x02
57
58
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
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
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
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
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
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
147
148
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
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
368
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");
670
