x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / input / misc / bma150.c
blob865c2f9d25b9ff9cb55f63505852d89c06cf9687
1 /*
2 * Copyright (c) 2011 Bosch Sensortec GmbH
3 * Copyright (c) 2011 Unixphere
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.
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
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.
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.
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.
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>
38 #define ABSMAX_ACC_VAL 0x01FF
39 #define ABSMIN_ACC_VAL -(ABSMAX_ACC_VAL)
41 /* Each axis is represented by a 2-byte data word */
42 #define BMA150_XYZ_DATA_SIZE 6
44 /* Input poll interval in milliseconds */
45 #define BMA150_POLL_INTERVAL 10
46 #define BMA150_POLL_MAX 200
47 #define BMA150_POLL_MIN 0
49 #define BMA150_MODE_NORMAL 0
50 #define BMA150_MODE_SLEEP 2
51 #define BMA150_MODE_WAKE_UP 3
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
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
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
72 #define BMA150_CHIP_ID 2
73 #define BMA150_CHIP_ID_REG BMA150_DATA_0_REG
75 #define BMA150_ACC_X_LSB_REG BMA150_DATA_2_REG
77 #define BMA150_SLEEP_POS 0
78 #define BMA150_SLEEP_MSK 0x01
79 #define BMA150_SLEEP_REG BMA150_CTRL_0_REG
81 #define BMA150_BANDWIDTH_POS 0
82 #define BMA150_BANDWIDTH_MSK 0x07
83 #define BMA150_BANDWIDTH_REG BMA150_CTRL_2_REG
85 #define BMA150_RANGE_POS 3
86 #define BMA150_RANGE_MSK 0x18
87 #define BMA150_RANGE_REG BMA150_CTRL_2_REG
89 #define BMA150_WAKE_UP_POS 0
90 #define BMA150_WAKE_UP_MSK 0x01
91 #define BMA150_WAKE_UP_REG BMA150_CTRL_3_REG
93 #define BMA150_SW_RES_POS 1
94 #define BMA150_SW_RES_MSK 0x02
95 #define BMA150_SW_RES_REG BMA150_CTRL_0_REG
97 /* Any-motion interrupt register fields */
98 #define BMA150_ANY_MOTION_EN_POS 6
99 #define BMA150_ANY_MOTION_EN_MSK 0x40
100 #define BMA150_ANY_MOTION_EN_REG BMA150_CTRL_1_REG
102 #define BMA150_ANY_MOTION_DUR_POS 6
103 #define BMA150_ANY_MOTION_DUR_MSK 0xC0
104 #define BMA150_ANY_MOTION_DUR_REG BMA150_CFG_5_REG
106 #define BMA150_ANY_MOTION_THRES_REG BMA150_CFG_4_REG
108 /* Advanced interrupt register fields */
109 #define BMA150_ADV_INT_EN_POS 6
110 #define BMA150_ADV_INT_EN_MSK 0x40
111 #define BMA150_ADV_INT_EN_REG BMA150_CTRL_3_REG
113 /* High-G interrupt register fields */
114 #define BMA150_HIGH_G_EN_POS 1
115 #define BMA150_HIGH_G_EN_MSK 0x02
116 #define BMA150_HIGH_G_EN_REG BMA150_CTRL_1_REG
118 #define BMA150_HIGH_G_HYST_POS 3
119 #define BMA150_HIGH_G_HYST_MSK 0x38
120 #define BMA150_HIGH_G_HYST_REG BMA150_CFG_5_REG
122 #define BMA150_HIGH_G_DUR_REG BMA150_CFG_3_REG
123 #define BMA150_HIGH_G_THRES_REG BMA150_CFG_2_REG
125 /* Low-G interrupt register fields */
126 #define BMA150_LOW_G_EN_POS 0
127 #define BMA150_LOW_G_EN_MSK 0x01
128 #define BMA150_LOW_G_EN_REG BMA150_CTRL_1_REG
130 #define BMA150_LOW_G_HYST_POS 0
131 #define BMA150_LOW_G_HYST_MSK 0x07
132 #define BMA150_LOW_G_HYST_REG BMA150_CFG_5_REG
134 #define BMA150_LOW_G_DUR_REG BMA150_CFG_1_REG
135 #define BMA150_LOW_G_THRES_REG BMA150_CFG_0_REG
137 struct bma150_data {
138 struct i2c_client *client;
139 struct input_polled_dev *input_polled;
140 struct input_dev *input;
141 u8 mode;
145 * The settings for the given range, bandwidth and interrupt features
146 * are stated and verified by Bosch Sensortec where they are configured
147 * to provide a generic sensitivity performance.
149 static struct bma150_cfg default_cfg = {
150 .any_motion_int = 1,
151 .hg_int = 1,
152 .lg_int = 1,
153 .any_motion_dur = 0,
154 .any_motion_thres = 0,
155 .hg_hyst = 0,
156 .hg_dur = 150,
157 .hg_thres = 160,
158 .lg_hyst = 0,
159 .lg_dur = 150,
160 .lg_thres = 20,
161 .range = BMA150_RANGE_2G,
162 .bandwidth = BMA150_BW_50HZ
165 static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
167 s32 ret;
169 /* As per specification, disable irq in between register writes */
170 if (client->irq)
171 disable_irq_nosync(client->irq);
173 ret = i2c_smbus_write_byte_data(client, reg, val);
175 if (client->irq)
176 enable_irq(client->irq);
178 return ret;
181 static int bma150_set_reg_bits(struct i2c_client *client,
182 int val, int shift, u8 mask, u8 reg)
184 int data;
186 data = i2c_smbus_read_byte_data(client, reg);
187 if (data < 0)
188 return data;
190 data = (data & ~mask) | ((val << shift) & mask);
191 return bma150_write_byte(client, reg, data);
194 static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
196 int error;
198 error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
199 BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
200 if (error)
201 return error;
203 error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
204 BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
205 if (error)
206 return error;
208 if (mode == BMA150_MODE_NORMAL)
209 msleep(2);
211 bma150->mode = mode;
212 return 0;
215 static int bma150_soft_reset(struct bma150_data *bma150)
217 int error;
219 error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
220 BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
221 if (error)
222 return error;
224 msleep(2);
225 return 0;
228 static int bma150_set_range(struct bma150_data *bma150, u8 range)
230 return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
231 BMA150_RANGE_MSK, BMA150_RANGE_REG);
234 static int bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
236 return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
237 BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
240 static int bma150_set_low_g_interrupt(struct bma150_data *bma150,
241 u8 enable, u8 hyst, u8 dur, u8 thres)
243 int error;
245 error = bma150_set_reg_bits(bma150->client, hyst,
246 BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
247 BMA150_LOW_G_HYST_REG);
248 if (error)
249 return error;
251 error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
252 if (error)
253 return error;
255 error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
256 if (error)
257 return error;
259 return bma150_set_reg_bits(bma150->client, !!enable,
260 BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
261 BMA150_LOW_G_EN_REG);
264 static int bma150_set_high_g_interrupt(struct bma150_data *bma150,
265 u8 enable, u8 hyst, u8 dur, u8 thres)
267 int error;
269 error = bma150_set_reg_bits(bma150->client, hyst,
270 BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
271 BMA150_HIGH_G_HYST_REG);
272 if (error)
273 return error;
275 error = bma150_write_byte(bma150->client,
276 BMA150_HIGH_G_DUR_REG, dur);
277 if (error)
278 return error;
280 error = bma150_write_byte(bma150->client,
281 BMA150_HIGH_G_THRES_REG, thres);
282 if (error)
283 return error;
285 return bma150_set_reg_bits(bma150->client, !!enable,
286 BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
287 BMA150_HIGH_G_EN_REG);
291 static int bma150_set_any_motion_interrupt(struct bma150_data *bma150,
292 u8 enable, u8 dur, u8 thres)
294 int error;
296 error = bma150_set_reg_bits(bma150->client, dur,
297 BMA150_ANY_MOTION_DUR_POS,
298 BMA150_ANY_MOTION_DUR_MSK,
299 BMA150_ANY_MOTION_DUR_REG);
300 if (error)
301 return error;
303 error = bma150_write_byte(bma150->client,
304 BMA150_ANY_MOTION_THRES_REG, thres);
305 if (error)
306 return error;
308 error = bma150_set_reg_bits(bma150->client, !!enable,
309 BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
310 BMA150_ADV_INT_EN_REG);
311 if (error)
312 return error;
314 return bma150_set_reg_bits(bma150->client, !!enable,
315 BMA150_ANY_MOTION_EN_POS,
316 BMA150_ANY_MOTION_EN_MSK,
317 BMA150_ANY_MOTION_EN_REG);
320 static void bma150_report_xyz(struct bma150_data *bma150)
322 u8 data[BMA150_XYZ_DATA_SIZE];
323 s16 x, y, z;
324 s32 ret;
326 ret = i2c_smbus_read_i2c_block_data(bma150->client,
327 BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
328 if (ret != BMA150_XYZ_DATA_SIZE)
329 return;
331 x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
332 y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
333 z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
335 /* sign extension */
336 x = (s16) (x << 6) >> 6;
337 y = (s16) (y << 6) >> 6;
338 z = (s16) (z << 6) >> 6;
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);
346 static irqreturn_t bma150_irq_thread(int irq, void *dev)
348 bma150_report_xyz(dev);
350 return IRQ_HANDLED;
353 static void bma150_poll(struct input_polled_dev *dev)
355 bma150_report_xyz(dev->private);
358 static int bma150_open(struct bma150_data *bma150)
360 int error;
362 error = pm_runtime_get_sync(&bma150->client->dev);
363 if (error < 0 && error != -ENOSYS)
364 return error;
367 * See if runtime PM woke up the device. If runtime PM
368 * is disabled we need to do it ourselves.
370 if (bma150->mode != BMA150_MODE_NORMAL) {
371 error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
372 if (error)
373 return error;
376 return 0;
379 static void bma150_close(struct bma150_data *bma150)
381 pm_runtime_put_sync(&bma150->client->dev);
383 if (bma150->mode != BMA150_MODE_SLEEP)
384 bma150_set_mode(bma150, BMA150_MODE_SLEEP);
387 static int bma150_irq_open(struct input_dev *input)
389 struct bma150_data *bma150 = input_get_drvdata(input);
391 return bma150_open(bma150);
394 static void bma150_irq_close(struct input_dev *input)
396 struct bma150_data *bma150 = input_get_drvdata(input);
398 bma150_close(bma150);
401 static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
403 struct bma150_data *bma150 = ipoll_dev->private;
405 bma150_open(bma150);
408 static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
410 struct bma150_data *bma150 = ipoll_dev->private;
412 bma150_close(bma150);
415 static int bma150_initialize(struct bma150_data *bma150,
416 const struct bma150_cfg *cfg)
418 int error;
420 error = bma150_soft_reset(bma150);
421 if (error)
422 return error;
424 error = bma150_set_bandwidth(bma150, cfg->bandwidth);
425 if (error)
426 return error;
428 error = bma150_set_range(bma150, cfg->range);
429 if (error)
430 return error;
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;
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;
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;
453 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
456 static void bma150_init_input_device(struct bma150_data *bma150,
457 struct input_dev *idev)
459 idev->name = BMA150_DRIVER;
460 idev->phys = BMA150_DRIVER "/input0";
461 idev->id.bustype = BUS_I2C;
462 idev->dev.parent = &bma150->client->dev;
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);
470 static int bma150_register_input_device(struct bma150_data *bma150)
472 struct input_dev *idev;
473 int error;
475 idev = input_allocate_device();
476 if (!idev)
477 return -ENOMEM;
479 bma150_init_input_device(bma150, idev);
481 idev->open = bma150_irq_open;
482 idev->close = bma150_irq_close;
483 input_set_drvdata(idev, bma150);
485 error = input_register_device(idev);
486 if (error) {
487 input_free_device(idev);
488 return error;
491 bma150->input = idev;
492 return 0;
495 static int bma150_register_polled_device(struct bma150_data *bma150)
497 struct input_polled_dev *ipoll_dev;
498 int error;
500 ipoll_dev = input_allocate_polled_device();
501 if (!ipoll_dev)
502 return -ENOMEM;
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;
512 bma150_init_input_device(bma150, ipoll_dev->input);
514 error = input_register_polled_device(ipoll_dev);
515 if (error) {
516 input_free_polled_device(ipoll_dev);
517 return error;
520 bma150->input_polled = ipoll_dev;
521 bma150->input = ipoll_dev->input;
523 return 0;
526 static int bma150_probe(struct i2c_client *client,
527 const struct i2c_device_id *id)
529 const struct bma150_platform_data *pdata = client->dev.platform_data;
530 const struct bma150_cfg *cfg;
531 struct bma150_data *bma150;
532 int chip_id;
533 int error;
535 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
536 dev_err(&client->dev, "i2c_check_functionality error\n");
537 return -EIO;
540 chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
541 if (chip_id != BMA150_CHIP_ID) {
542 dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
543 return -EINVAL;
546 bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
547 if (!bma150)
548 return -ENOMEM;
550 bma150->client = client;
552 if (pdata) {
553 if (pdata->irq_gpio_cfg) {
554 error = pdata->irq_gpio_cfg();
555 if (error) {
556 dev_err(&client->dev,
557 "IRQ GPIO conf. error %d, error %d\n",
558 client->irq, error);
559 goto err_free_mem;
562 cfg = &pdata->cfg;
563 } else {
564 cfg = &default_cfg;
567 error = bma150_initialize(bma150, cfg);
568 if (error)
569 goto err_free_mem;
571 if (client->irq > 0) {
572 error = bma150_register_input_device(bma150);
573 if (error)
574 goto err_free_mem;
576 error = request_threaded_irq(client->irq,
577 NULL, bma150_irq_thread,
578 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
579 BMA150_DRIVER, bma150);
580 if (error) {
581 dev_err(&client->dev,
582 "irq request failed %d, error %d\n",
583 client->irq, error);
584 input_unregister_device(bma150->input);
585 goto err_free_mem;
587 } else {
588 error = bma150_register_polled_device(bma150);
589 if (error)
590 goto err_free_mem;
593 i2c_set_clientdata(client, bma150);
595 pm_runtime_enable(&client->dev);
597 return 0;
599 err_free_mem:
600 kfree(bma150);
601 return error;
604 static int bma150_remove(struct i2c_client *client)
606 struct bma150_data *bma150 = i2c_get_clientdata(client);
608 pm_runtime_disable(&client->dev);
610 if (client->irq > 0) {
611 free_irq(client->irq, bma150);
612 input_unregister_device(bma150->input);
613 } else {
614 input_unregister_polled_device(bma150->input_polled);
615 input_free_polled_device(bma150->input_polled);
618 kfree(bma150);
620 return 0;
623 #ifdef CONFIG_PM
624 static int bma150_suspend(struct device *dev)
626 struct i2c_client *client = to_i2c_client(dev);
627 struct bma150_data *bma150 = i2c_get_clientdata(client);
629 return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
632 static int bma150_resume(struct device *dev)
634 struct i2c_client *client = to_i2c_client(dev);
635 struct bma150_data *bma150 = i2c_get_clientdata(client);
637 return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
639 #endif
641 static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
643 static const struct i2c_device_id bma150_id[] = {
644 { "bma150", 0 },
645 { "smb380", 0 },
646 { "bma023", 0 },
650 MODULE_DEVICE_TABLE(i2c, bma150_id);
652 static struct i2c_driver bma150_driver = {
653 .driver = {
654 .owner = THIS_MODULE,
655 .name = BMA150_DRIVER,
656 .pm = &bma150_pm,
658 .class = I2C_CLASS_HWMON,
659 .id_table = bma150_id,
660 .probe = bma150_probe,
661 .remove = bma150_remove,
664 module_i2c_driver(bma150_driver);
666 MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
667 MODULE_DESCRIPTION("BMA150 driver");
668 MODULE_LICENSE("GPL");