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