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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 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
337 x = (s16) (x << 6) >> 6;
338 y = (s16) (y << 6) >> 6;
339 z = (s16) (z << 6) >> 6;
340
341 input_report_abs(bma150->input, ABS_X, x);
342 input_report_abs(bma150->input, ABS_Y, y);
343 input_report_abs(bma150->input, ABS_Z, z);
344 input_sync(bma150->input);
345}
346
347static irqreturn_t bma150_irq_thread(int irq, void *dev)
348{
349 bma150_report_xyz(dev);
350
351 return IRQ_HANDLED;
352}
353
354static void bma150_poll(struct input_polled_dev *dev)
355{
356 bma150_report_xyz(dev->private);
357}
358
359static int bma150_open(struct bma150_data *bma150)
360{
361 int error;
362
363 error = pm_runtime_get_sync(&bma150->client->dev);
364 if (error < 0 && error != -ENOSYS)
365 return error;
366
367
368
369
370
371 if (bma150->mode != BMA150_MODE_NORMAL) {
372 error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
373 if (error)
374 return error;
375 }
376
377 return 0;
378}
379
380static void bma150_close(struct bma150_data *bma150)
381{
382 pm_runtime_put_sync(&bma150->client->dev);
383
384 if (bma150->mode != BMA150_MODE_SLEEP)
385 bma150_set_mode(bma150, BMA150_MODE_SLEEP);
386}
387
388static int bma150_irq_open(struct input_dev *input)
389{
390 struct bma150_data *bma150 = input_get_drvdata(input);
391
392 return bma150_open(bma150);
393}
394
395static void bma150_irq_close(struct input_dev *input)
396{
397 struct bma150_data *bma150 = input_get_drvdata(input);
398
399 bma150_close(bma150);
400}
401
402static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
403{
404 struct bma150_data *bma150 = ipoll_dev->private;
405
406 bma150_open(bma150);
407}
408
409static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
410{
411 struct bma150_data *bma150 = ipoll_dev->private;
412
413 bma150_close(bma150);
414}
415
416static int bma150_initialize(struct bma150_data *bma150,
417 const struct bma150_cfg *cfg)
418{
419 int error;
420
421 error = bma150_soft_reset(bma150);
422 if (error)
423 return error;
424
425 error = bma150_set_bandwidth(bma150, cfg->bandwidth);
426 if (error)
427 return error;
428
429 error = bma150_set_range(bma150, cfg->range);
430 if (error)
431 return error;
432
433 if (bma150->client->irq) {
434 error = bma150_set_any_motion_interrupt(bma150,
435 cfg->any_motion_int,
436 cfg->any_motion_dur,
437 cfg->any_motion_thres);
438 if (error)
439 return error;
440
441 error = bma150_set_high_g_interrupt(bma150,
442 cfg->hg_int, cfg->hg_hyst,
443 cfg->hg_dur, cfg->hg_thres);
444 if (error)
445 return error;
446
447 error = bma150_set_low_g_interrupt(bma150,
448 cfg->lg_int, cfg->lg_hyst,
449 cfg->lg_dur, cfg->lg_thres);
450 if (error)
451 return error;
452 }
453
454 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
455}
456
457static void bma150_init_input_device(struct bma150_data *bma150,
458 struct input_dev *idev)
459{
460 idev->name = BMA150_DRIVER;
461 idev->phys = BMA150_DRIVER "/input0";
462 idev->id.bustype = BUS_I2C;
463 idev->dev.parent = &bma150->client->dev;
464
465 idev->evbit[0] = BIT_MASK(EV_ABS);
466 input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
467 input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
468 input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
469}
470
471static int bma150_register_input_device(struct bma150_data *bma150)
472{
473 struct input_dev *idev;
474 int error;
475
476 idev = input_allocate_device();
477 if (!idev)
478 return -ENOMEM;
479
480 bma150_init_input_device(bma150, idev);
481
482 idev->open = bma150_irq_open;
483 idev->close = bma150_irq_close;
484 input_set_drvdata(idev, bma150);
485
486 error = input_register_device(idev);
487 if (error) {
488 input_free_device(idev);
489 return error;
490 }
491
492 bma150->input = idev;
493 return 0;
494}
495
496static int bma150_register_polled_device(struct bma150_data *bma150)
497{
498 struct input_polled_dev *ipoll_dev;
499 int error;
500
501 ipoll_dev = input_allocate_polled_device();
502 if (!ipoll_dev)
503 return -ENOMEM;
504
505 ipoll_dev->private = bma150;
506 ipoll_dev->open = bma150_poll_open;
507 ipoll_dev->close = bma150_poll_close;
508 ipoll_dev->poll = bma150_poll;
509 ipoll_dev->poll_interval = BMA150_POLL_INTERVAL;
510 ipoll_dev->poll_interval_min = BMA150_POLL_MIN;
511 ipoll_dev->poll_interval_max = BMA150_POLL_MAX;
512
513 bma150_init_input_device(bma150, ipoll_dev->input);
514
515 error = input_register_polled_device(ipoll_dev);
516 if (error) {
517 input_free_polled_device(ipoll_dev);
518 return error;
519 }
520
521 bma150->input_polled = ipoll_dev;
522 bma150->input = ipoll_dev->input;
523
524 return 0;
525}
526
527static int bma150_probe(struct i2c_client *client,
528 const struct i2c_device_id *id)
529{
530 const struct bma150_platform_data *pdata =
531 dev_get_platdata(&client->dev);
532 const struct bma150_cfg *cfg;
533 struct bma150_data *bma150;
534 int chip_id;
535 int error;
536
537 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
538 dev_err(&client->dev, "i2c_check_functionality error\n");
539 return -EIO;
540 }
541
542 chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
543 if (chip_id != BMA150_CHIP_ID && chip_id != BMA180_CHIP_ID) {
544 dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
545 return -EINVAL;
546 }
547
548 bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
549 if (!bma150)
550 return -ENOMEM;
551
552 bma150->client = client;
553
554 if (pdata) {
555 if (pdata->irq_gpio_cfg) {
556 error = pdata->irq_gpio_cfg();
557 if (error) {
558 dev_err(&client->dev,
559 "IRQ GPIO conf. error %d, error %d\n",
560 client->irq, error);
561 goto err_free_mem;
562 }
563 }
564 cfg = &pdata->cfg;
565 } else {
566 cfg = &default_cfg;
567 }
568
569 error = bma150_initialize(bma150, cfg);
570 if (error)
571 goto err_free_mem;
572
573 if (client->irq > 0) {
574 error = bma150_register_input_device(bma150);
575 if (error)
576 goto err_free_mem;
577
578 error = request_threaded_irq(client->irq,
579 NULL, bma150_irq_thread,
580 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
581 BMA150_DRIVER, bma150);
582 if (error) {
583 dev_err(&client->dev,
584 "irq request failed %d, error %d\n",
585 client->irq, error);
586 input_unregister_device(bma150->input);
587 goto err_free_mem;
588 }
589 } else {
590 error = bma150_register_polled_device(bma150);
591 if (error)
592 goto err_free_mem;
593 }
594
595 i2c_set_clientdata(client, bma150);
596
597 pm_runtime_enable(&client->dev);
598
599 return 0;
600
601err_free_mem:
602 kfree(bma150);
603 return error;
604}
605
606static int bma150_remove(struct i2c_client *client)
607{
608 struct bma150_data *bma150 = i2c_get_clientdata(client);
609
610 pm_runtime_disable(&client->dev);
611
612 if (client->irq > 0) {
613 free_irq(client->irq, bma150);
614 input_unregister_device(bma150->input);
615 } else {
616 input_unregister_polled_device(bma150->input_polled);
617 input_free_polled_device(bma150->input_polled);
618 }
619
620 kfree(bma150);
621
622 return 0;
623}
624
625#ifdef CONFIG_PM
626static int bma150_suspend(struct device *dev)
627{
628 struct i2c_client *client = to_i2c_client(dev);
629 struct bma150_data *bma150 = i2c_get_clientdata(client);
630
631 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
632}
633
634static int bma150_resume(struct device *dev)
635{
636 struct i2c_client *client = to_i2c_client(dev);
637 struct bma150_data *bma150 = i2c_get_clientdata(client);
638
639 return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
640}
641#endif
642
643static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
644
645static const struct i2c_device_id bma150_id[] = {
646 { "bma150", 0 },
647 { "bma180", 0 },
648 { "smb380", 0 },
649 { "bma023", 0 },
650 { }
651};
652
653MODULE_DEVICE_TABLE(i2c, bma150_id);
654
655static struct i2c_driver bma150_driver = {
656 .driver = {
657 .owner = THIS_MODULE,
658 .name = BMA150_DRIVER,
659 .pm = &bma150_pm,
660 },
661 .class = I2C_CLASS_HWMON,
662 .id_table = bma150_id,
663 .probe = bma150_probe,
664 .remove = bma150_remove,
665};
666
667module_i2c_driver(bma150_driver);
668
669MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
670MODULE_DESCRIPTION("BMA150 driver");
671MODULE_LICENSE("GPL");
672
