blob: 3d56ae7ef8def5c507bbd2eb95241d32e2e10832 [file] [log] [blame]
Samu Onkalo190420a2010-10-26 14:22:37 -07001/*
2 * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver.
3 * Chip is combined proximity and ambient light sensor.
4 *
5 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
6 *
7 * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21 * 02110-1301 USA
22 *
23 */
24
25#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/i2c.h>
28#include <linux/interrupt.h>
29#include <linux/mutex.h>
30#include <linux/i2c/bh1770glc.h>
31#include <linux/regulator/consumer.h>
32#include <linux/pm_runtime.h>
33#include <linux/workqueue.h>
34#include <linux/delay.h>
35#include <linux/wait.h>
36#include <linux/slab.h>
37
38#define BH1770_ALS_CONTROL 0x80 /* ALS operation mode control */
39#define BH1770_PS_CONTROL 0x81 /* PS operation mode control */
40#define BH1770_I_LED 0x82 /* active LED and LED1, LED2 current */
41#define BH1770_I_LED3 0x83 /* LED3 current setting */
42#define BH1770_ALS_PS_MEAS 0x84 /* Forced mode trigger */
43#define BH1770_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */
44#define BH1770_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */
45#define BH1770_PART_ID 0x8a /* Part number and revision ID */
46#define BH1770_MANUFACT_ID 0x8b /* Manufacturerer ID */
47#define BH1770_ALS_DATA_0 0x8c /* ALS DATA low byte */
48#define BH1770_ALS_DATA_1 0x8d /* ALS DATA high byte */
49#define BH1770_ALS_PS_STATUS 0x8e /* Measurement data and int status */
50#define BH1770_PS_DATA_LED1 0x8f /* PS data from LED1 */
51#define BH1770_PS_DATA_LED2 0x90 /* PS data from LED2 */
52#define BH1770_PS_DATA_LED3 0x91 /* PS data from LED3 */
53#define BH1770_INTERRUPT 0x92 /* Interrupt setting */
54#define BH1770_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */
55#define BH1770_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */
56#define BH1770_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */
57#define BH1770_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */
58#define BH1770_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */
59#define BH1770_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */
60#define BH1770_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */
61
62/* MANUFACT_ID */
63#define BH1770_MANUFACT_ROHM 0x01
64#define BH1770_MANUFACT_OSRAM 0x03
65
66/* PART_ID */
67#define BH1770_PART 0x90
68#define BH1770_PART_MASK 0xf0
69#define BH1770_REV_MASK 0x0f
70#define BH1770_REV_SHIFT 0
71#define BH1770_REV_0 0x00
72#define BH1770_REV_1 0x01
73
74/* Operating modes for both */
75#define BH1770_STANDBY 0x00
76#define BH1770_FORCED 0x02
77#define BH1770_STANDALONE 0x03
78#define BH1770_SWRESET (0x01 << 2)
79
80#define BH1770_PS_TRIG_MEAS (1 << 0)
81#define BH1770_ALS_TRIG_MEAS (1 << 1)
82
83/* Interrupt control */
84#define BH1770_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */
85#define BH1770_INT_POLARITY (1 << 2) /* 1 = active high */
86#define BH1770_INT_ALS_ENA (1 << 1)
87#define BH1770_INT_PS_ENA (1 << 0)
88
89/* Interrupt status */
90#define BH1770_INT_LED1_DATA (1 << 0)
91#define BH1770_INT_LED1_INT (1 << 1)
92#define BH1770_INT_LED2_DATA (1 << 2)
93#define BH1770_INT_LED2_INT (1 << 3)
94#define BH1770_INT_LED3_DATA (1 << 4)
95#define BH1770_INT_LED3_INT (1 << 5)
96#define BH1770_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5))
97#define BH1770_INT_ALS_DATA (1 << 6)
98#define BH1770_INT_ALS_INT (1 << 7)
99
100/* Led channels */
101#define BH1770_LED1 0x00
102
103#define BH1770_DISABLE 0
104#define BH1770_ENABLE 1
105#define BH1770_PROX_CHANNELS 1
106
107#define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */
108#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */
109#define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */
110#define BH1770_STARTUP_DELAY 50
111#define BH1770_RESET_TIME 10
112#define BH1770_TIMEOUT 2100 /* Timeout in 2.1 seconds */
113
114#define BH1770_LUX_RANGE 65535
115#define BH1770_PROX_RANGE 255
116#define BH1770_COEF_SCALER 1024
117#define BH1770_CALIB_SCALER 8192
118#define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER)
119#define BH1770_LUX_DEF_THRES 1000
120#define BH1770_PROX_DEF_THRES 70
121#define BH1770_PROX_DEF_ABS_THRES 100
122#define BH1770_DEFAULT_PERSISTENCE 10
123#define BH1770_PROX_MAX_PERSISTENCE 50
124#define BH1770_LUX_GA_SCALE 16384
125#define BH1770_LUX_CF_SCALE 2048 /* CF ChipFactor */
126#define BH1770_NEUTRAL_CF BH1770_LUX_CF_SCALE
127#define BH1770_LUX_CORR_SCALE 4096
128
129#define PROX_ABOVE_THRESHOLD 1
130#define PROX_BELOW_THRESHOLD 0
131
132#define PROX_IGNORE_LUX_LIMIT 500
133
134struct bh1770_chip {
135 struct bh1770_platform_data *pdata;
136 char chipname[10];
137 u8 revision;
138 struct i2c_client *client;
139 struct regulator_bulk_data regs[2];
140 struct mutex mutex; /* avoid parallel access */
141 wait_queue_head_t wait;
142
143 bool int_mode_prox;
144 bool int_mode_lux;
145 struct delayed_work prox_work;
146 u32 lux_cf; /* Chip specific factor */
147 u32 lux_ga;
148 u32 lux_calib;
149 int lux_rate_index;
150 u32 lux_corr;
151 u16 lux_data_raw;
152 u16 lux_threshold_hi;
153 u16 lux_threshold_lo;
154 u16 lux_thres_hi_onchip;
155 u16 lux_thres_lo_onchip;
156 bool lux_wait_result;
157
158 int prox_enable_count;
159 u16 prox_coef;
160 u16 prox_const;
161 int prox_rate;
162 int prox_rate_threshold;
163 u8 prox_persistence;
164 u8 prox_persistence_counter;
165 u8 prox_data;
166 u8 prox_threshold;
167 u8 prox_threshold_hw;
168 bool prox_force_update;
169 u8 prox_abs_thres;
170 u8 prox_led;
171};
172
173static const char reg_vcc[] = "Vcc";
174static const char reg_vleds[] = "Vleds";
175
176/*
177 * Supported stand alone rates in ms from chip data sheet
178 * {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000};
179 */
180static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2};
181static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500};
182
183/* Supported IR-led currents in mA */
184static const u8 prox_curr_ma[] = {5, 10, 20, 50, 100, 150, 200};
185
186/*
187 * Supported stand alone rates in ms from chip data sheet
188 * {100, 200, 500, 1000, 2000};
189 */
190static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0};
191
192/*
193 * interrupt control functions are called while keeping chip->mutex
194 * excluding module probe / remove
195 */
196static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip,
197 int lux)
198{
199 chip->int_mode_lux = lux;
200 /* Set interrupt modes, interrupt active low, latched */
201 return i2c_smbus_write_byte_data(chip->client,
202 BH1770_INTERRUPT,
203 (lux << 1) | chip->int_mode_prox);
204}
205
206static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip,
207 int ps)
208{
209 chip->int_mode_prox = ps;
210 return i2c_smbus_write_byte_data(chip->client,
211 BH1770_INTERRUPT,
212 (chip->int_mode_lux << 1) | (ps << 0));
213}
214
215/* chip->mutex is always kept here */
216static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index)
217{
218 /* sysfs may call this when the chip is powered off */
219 if (pm_runtime_suspended(&chip->client->dev))
220 return 0;
221
222 /* Proper proximity response needs fastest lux rate (100ms) */
223 if (chip->prox_enable_count)
224 rate_index = 0;
225
226 return i2c_smbus_write_byte_data(chip->client,
227 BH1770_ALS_MEAS_RATE,
228 rate_index);
229}
230
231static int bh1770_prox_rate(struct bh1770_chip *chip, int mode)
232{
233 int rate;
234
235 rate = (mode == PROX_ABOVE_THRESHOLD) ?
236 chip->prox_rate_threshold : chip->prox_rate;
237
238 return i2c_smbus_write_byte_data(chip->client,
239 BH1770_PS_MEAS_RATE,
240 rate);
241}
242
243/* InfraredLED is controlled by the chip during proximity scanning */
244static inline int bh1770_led_cfg(struct bh1770_chip *chip)
245{
246 /* LED cfg, current for leds 1 and 2 */
247 return i2c_smbus_write_byte_data(chip->client,
248 BH1770_I_LED,
249 (BH1770_LED1 << 6) |
250 (BH1770_LED_5mA << 3) |
251 chip->prox_led);
252}
253
254/*
255 * Following two functions converts raw ps values from HW to normalized
256 * values. Purpose is to compensate differences between different sensor
257 * versions and variants so that result means about the same between
258 * versions.
259 */
260static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw)
261{
262 u16 adjusted;
263 adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) /
264 BH1770_COEF_SCALER);
265 if (adjusted > BH1770_PROX_RANGE)
266 adjusted = BH1770_PROX_RANGE;
267 return adjusted;
268}
269
270static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps)
271{
272 u16 raw;
273
274 raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef);
275 if (raw > chip->prox_const)
276 raw = raw - chip->prox_const;
277 else
278 raw = 0;
279 return raw;
280}
281
282/*
283 * Following two functions converts raw lux values from HW to normalized
284 * values. Purpose is to compensate differences between different sensor
285 * versions and variants so that result means about the same between
286 * versions. Chip->mutex is kept when this is called.
287 */
288static int bh1770_prox_set_threshold(struct bh1770_chip *chip)
289{
290 u8 tmp = 0;
291
292 /* sysfs may call this when the chip is powered off */
293 if (pm_runtime_suspended(&chip->client->dev))
294 return 0;
295
296 tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold);
297 chip->prox_threshold_hw = tmp;
298
299 return i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1,
300 tmp);
301}
302
303static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw)
304{
305 u32 lux;
306 lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE;
307 return min(lux, (u32)BH1770_LUX_RANGE);
308}
309
310static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip,
311 u16 adjusted)
312{
313 return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr;
314}
315
316/* chip->mutex is kept when this is called */
317static int bh1770_lux_update_thresholds(struct bh1770_chip *chip,
318 u16 threshold_hi, u16 threshold_lo)
319{
320 u8 data[4];
321 int ret;
322
323 /* sysfs may call this when the chip is powered off */
324 if (pm_runtime_suspended(&chip->client->dev))
325 return 0;
326
327 /*
328 * Compensate threshold values with the correction factors if not
329 * set to minimum or maximum.
330 * Min & max values disables interrupts.
331 */
332 if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0)
333 threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi);
334
335 if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0)
336 threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo);
337
338 if (chip->lux_thres_hi_onchip == threshold_hi &&
339 chip->lux_thres_lo_onchip == threshold_lo)
340 return 0;
341
342 chip->lux_thres_hi_onchip = threshold_hi;
343 chip->lux_thres_lo_onchip = threshold_lo;
344
345 data[0] = threshold_hi;
346 data[1] = threshold_hi >> 8;
347 data[2] = threshold_lo;
348 data[3] = threshold_lo >> 8;
349
350 ret = i2c_smbus_write_i2c_block_data(chip->client,
351 BH1770_ALS_TH_UP_0,
352 ARRAY_SIZE(data),
353 data);
354 return ret;
355}
356
357static int bh1770_lux_get_result(struct bh1770_chip *chip)
358{
359 u16 data;
360 int ret;
361
362 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0);
363 if (ret < 0)
364 return ret;
365
366 data = ret & 0xff;
367 ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1);
368 if (ret < 0)
369 return ret;
370
371 chip->lux_data_raw = data | ((ret & 0xff) << 8);
372
373 return 0;
374}
375
376/* Calculate correction value which contains chip and device specific parts */
377static u32 bh1770_get_corr_value(struct bh1770_chip *chip)
378{
379 u32 tmp;
380 /* Impact of glass attenuation correction */
381 tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE;
382 /* Impact of chip factor correction */
383 tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE;
384 /* Impact of Device specific calibration correction */
385 tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER;
386 return tmp;
387}
388
389static int bh1770_lux_read_result(struct bh1770_chip *chip)
390{
391 bh1770_lux_get_result(chip);
392 return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw);
393}
394
395/*
396 * Chip on / off functions are called while keeping mutex except probe
397 * or remove phase
398 */
399static int bh1770_chip_on(struct bh1770_chip *chip)
400{
401 int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
402 chip->regs);
403 if (ret < 0)
404 return ret;
405
406 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
407
408 /* Reset the chip */
409 i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL,
410 BH1770_SWRESET);
411 usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2);
412
413 /*
414 * ALS is started always since proximity needs als results
415 * for realibility estimation.
416 * Let's assume dark until the first ALS measurement is ready.
417 */
418 chip->lux_data_raw = 0;
419 chip->prox_data = 0;
420 ret = i2c_smbus_write_byte_data(chip->client,
421 BH1770_ALS_CONTROL, BH1770_STANDALONE);
422
423 /* Assume reset defaults */
424 chip->lux_thres_hi_onchip = BH1770_LUX_RANGE;
425 chip->lux_thres_lo_onchip = 0;
426
427 return ret;
428}
429
430static void bh1770_chip_off(struct bh1770_chip *chip)
431{
432 i2c_smbus_write_byte_data(chip->client,
433 BH1770_INTERRUPT, BH1770_DISABLE);
434 i2c_smbus_write_byte_data(chip->client,
435 BH1770_ALS_CONTROL, BH1770_STANDBY);
436 i2c_smbus_write_byte_data(chip->client,
437 BH1770_PS_CONTROL, BH1770_STANDBY);
438 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
439}
440
441/* chip->mutex is kept when this is called */
442static int bh1770_prox_mode_control(struct bh1770_chip *chip)
443{
444 if (chip->prox_enable_count) {
445 chip->prox_force_update = true; /* Force immediate update */
446
447 bh1770_lux_rate(chip, chip->lux_rate_index);
448 bh1770_prox_set_threshold(chip);
449 bh1770_led_cfg(chip);
450 bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD);
451 bh1770_prox_interrupt_control(chip, BH1770_ENABLE);
452 i2c_smbus_write_byte_data(chip->client,
453 BH1770_PS_CONTROL, BH1770_STANDALONE);
454 } else {
455 chip->prox_data = 0;
456 bh1770_lux_rate(chip, chip->lux_rate_index);
457 bh1770_prox_interrupt_control(chip, BH1770_DISABLE);
458 i2c_smbus_write_byte_data(chip->client,
459 BH1770_PS_CONTROL, BH1770_STANDBY);
460 }
461 return 0;
462}
463
464/* chip->mutex is kept when this is called */
465static int bh1770_prox_read_result(struct bh1770_chip *chip)
466{
467 int ret;
468 bool above;
469 u8 mode;
470
471 ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1);
472 if (ret < 0)
473 goto out;
474
475 if (ret > chip->prox_threshold_hw)
476 above = true;
477 else
478 above = false;
479
480 /*
481 * when ALS levels goes above limit, proximity result may be
482 * false proximity. Thus ignore the result. With real proximity
483 * there is a shadow causing low als levels.
484 */
485 if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT)
486 ret = 0;
487
488 chip->prox_data = bh1770_psraw_to_adjusted(chip, ret);
489
490 /* Strong proximity level or force mode requires immediate response */
491 if (chip->prox_data >= chip->prox_abs_thres ||
492 chip->prox_force_update)
493 chip->prox_persistence_counter = chip->prox_persistence;
494
495 chip->prox_force_update = false;
496
497 /* Persistence filttering to reduce false proximity events */
498 if (likely(above)) {
499 if (chip->prox_persistence_counter < chip->prox_persistence) {
500 chip->prox_persistence_counter++;
501 ret = -ENODATA;
502 } else {
503 mode = PROX_ABOVE_THRESHOLD;
504 ret = 0;
505 }
506 } else {
507 chip->prox_persistence_counter = 0;
508 mode = PROX_BELOW_THRESHOLD;
509 chip->prox_data = 0;
510 ret = 0;
511 }
512
513 /* Set proximity detection rate based on above or below value */
514 if (ret == 0) {
515 bh1770_prox_rate(chip, mode);
516 sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw");
517 }
518out:
519 return ret;
520}
521
522static int bh1770_detect(struct bh1770_chip *chip)
523{
524 struct i2c_client *client = chip->client;
525 s32 ret;
526 u8 manu, part;
527
528 ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID);
529 if (ret < 0)
530 goto error;
531 manu = (u8)ret;
532
533 ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID);
534 if (ret < 0)
535 goto error;
536 part = (u8)ret;
537
538 chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT;
539 chip->prox_coef = BH1770_COEF_SCALER;
540 chip->prox_const = 0;
541 chip->lux_cf = BH1770_NEUTRAL_CF;
542
543 if ((manu == BH1770_MANUFACT_ROHM) &&
544 ((part & BH1770_PART_MASK) == BH1770_PART)) {
545 snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC");
546 return 0;
547 }
548
549 if ((manu == BH1770_MANUFACT_OSRAM) &&
550 ((part & BH1770_PART_MASK) == BH1770_PART)) {
551 snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770");
552 /* Values selected by comparing different versions */
553 chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */
554 chip->prox_const = 40;
555 return 0;
556 }
557
558 ret = -ENODEV;
559error:
560 dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n");
561
562 return ret;
563}
564
565/*
566 * This work is re-scheduled at every proximity interrupt.
567 * If this work is running, it means that there hasn't been any
568 * proximity interrupt in time. Situation is handled as no-proximity.
569 * It would be nice to have low-threshold interrupt or interrupt
570 * when measurement and hi-threshold are both 0. But neither of those exists.
571 * This is a workaroud for missing HW feature.
572 */
573
574static void bh1770_prox_work(struct work_struct *work)
575{
576 struct bh1770_chip *chip =
577 container_of(work, struct bh1770_chip, prox_work.work);
578
579 mutex_lock(&chip->mutex);
580 bh1770_prox_read_result(chip);
581 mutex_unlock(&chip->mutex);
582}
583
584/* This is threaded irq handler */
585static irqreturn_t bh1770_irq(int irq, void *data)
586{
587 struct bh1770_chip *chip = data;
588 int status;
589 int rate = 0;
590
591 mutex_lock(&chip->mutex);
592 status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS);
593
594 /* Acknowledge interrupt by reading this register */
595 i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT);
596
597 /*
598 * Check if there is fresh data available for als.
599 * If this is the very first data, update thresholds after that.
600 */
601 if (status & BH1770_INT_ALS_DATA) {
602 bh1770_lux_get_result(chip);
603 if (unlikely(chip->lux_wait_result)) {
604 chip->lux_wait_result = false;
605 wake_up(&chip->wait);
606 bh1770_lux_update_thresholds(chip,
607 chip->lux_threshold_hi,
608 chip->lux_threshold_lo);
609 }
610 }
611
612 /* Disable interrupt logic to guarantee acknowledgement */
613 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
614 (0 << 1) | (0 << 0));
615
616 if ((status & BH1770_INT_ALS_INT))
617 sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input");
618
619 if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) {
620 rate = prox_rates_ms[chip->prox_rate_threshold];
621 bh1770_prox_read_result(chip);
622 }
623
624 /* Re-enable interrupt logic */
625 i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT,
626 (chip->int_mode_lux << 1) |
627 (chip->int_mode_prox << 0));
628 mutex_unlock(&chip->mutex);
629
630 /*
631 * Can't cancel work while keeping mutex since the work uses the
632 * same mutex.
633 */
634 if (rate) {
635 /*
636 * Simulate missing no-proximity interrupt 50ms after the
637 * next expected interrupt time.
638 */
639 cancel_delayed_work_sync(&chip->prox_work);
640 schedule_delayed_work(&chip->prox_work,
641 msecs_to_jiffies(rate + 50));
642 }
643 return IRQ_HANDLED;
644}
645
646static ssize_t bh1770_power_state_store(struct device *dev,
647 struct device_attribute *attr,
648 const char *buf, size_t count)
649{
650 struct bh1770_chip *chip = dev_get_drvdata(dev);
651 unsigned long value;
Dan Carpenteraec04282010-11-11 14:05:13 -0800652 ssize_t ret;
Samu Onkalo190420a2010-10-26 14:22:37 -0700653
654 if (strict_strtoul(buf, 0, &value))
655 return -EINVAL;
656
657 mutex_lock(&chip->mutex);
658 if (value) {
659 pm_runtime_get_sync(dev);
660
661 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
Dan Carpenteraec04282010-11-11 14:05:13 -0800662 if (ret < 0) {
663 pm_runtime_put(dev);
664 goto leave;
665 }
Samu Onkalo190420a2010-10-26 14:22:37 -0700666
Dan Carpenteraec04282010-11-11 14:05:13 -0800667 ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
Samu Onkalo190420a2010-10-26 14:22:37 -0700668 if (ret < 0) {
669 pm_runtime_put(dev);
670 goto leave;
671 }
672
673 /* This causes interrupt after the next measurement cycle */
674 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
675 BH1770_LUX_DEF_THRES);
676 /* Inform that we are waiting for a result from ALS */
677 chip->lux_wait_result = true;
678 bh1770_prox_mode_control(chip);
679 } else if (!pm_runtime_suspended(dev)) {
680 pm_runtime_put(dev);
681 }
682 ret = count;
683leave:
684 mutex_unlock(&chip->mutex);
685 return ret;
686}
687
688static ssize_t bh1770_power_state_show(struct device *dev,
689 struct device_attribute *attr, char *buf)
690{
691 return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
692}
693
694static ssize_t bh1770_lux_result_show(struct device *dev,
695 struct device_attribute *attr, char *buf)
696{
697 struct bh1770_chip *chip = dev_get_drvdata(dev);
698 ssize_t ret;
699 long timeout;
700
701 if (pm_runtime_suspended(dev))
702 return -EIO; /* Chip is not enabled at all */
703
704 timeout = wait_event_interruptible_timeout(chip->wait,
705 !chip->lux_wait_result,
706 msecs_to_jiffies(BH1770_TIMEOUT));
707 if (!timeout)
708 return -EIO;
709
710 mutex_lock(&chip->mutex);
711 ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip));
712 mutex_unlock(&chip->mutex);
713
714 return ret;
715}
716
717static ssize_t bh1770_lux_range_show(struct device *dev,
718 struct device_attribute *attr, char *buf)
719{
720 return sprintf(buf, "%d\n", BH1770_LUX_RANGE);
721}
722
723static ssize_t bh1770_prox_enable_store(struct device *dev,
724 struct device_attribute *attr,
725 const char *buf, size_t count)
726{
727 struct bh1770_chip *chip = dev_get_drvdata(dev);
728 unsigned long value;
729
730 if (strict_strtoul(buf, 0, &value))
731 return -EINVAL;
732
733 mutex_lock(&chip->mutex);
734 /* Assume no proximity. Sensor will tell real state soon */
735 if (!chip->prox_enable_count)
736 chip->prox_data = 0;
737
738 if (value)
739 chip->prox_enable_count++;
740 else if (chip->prox_enable_count > 0)
741 chip->prox_enable_count--;
742 else
743 goto leave;
744
745 /* Run control only when chip is powered on */
746 if (!pm_runtime_suspended(dev))
747 bh1770_prox_mode_control(chip);
748leave:
749 mutex_unlock(&chip->mutex);
750 return count;
751}
752
753static ssize_t bh1770_prox_enable_show(struct device *dev,
754 struct device_attribute *attr, char *buf)
755{
756 struct bh1770_chip *chip = dev_get_drvdata(dev);
757 ssize_t len;
758
759 mutex_lock(&chip->mutex);
760 len = sprintf(buf, "%d\n", chip->prox_enable_count);
761 mutex_unlock(&chip->mutex);
762 return len;
763}
764
765static ssize_t bh1770_prox_result_show(struct device *dev,
766 struct device_attribute *attr, char *buf)
767{
768 struct bh1770_chip *chip = dev_get_drvdata(dev);
769 ssize_t ret;
770
771 mutex_lock(&chip->mutex);
772 if (chip->prox_enable_count && !pm_runtime_suspended(dev))
773 ret = sprintf(buf, "%d\n", chip->prox_data);
774 else
775 ret = -EIO;
776 mutex_unlock(&chip->mutex);
777 return ret;
778}
779
780static ssize_t bh1770_prox_range_show(struct device *dev,
781 struct device_attribute *attr, char *buf)
782{
783 return sprintf(buf, "%d\n", BH1770_PROX_RANGE);
784}
785
786static ssize_t bh1770_get_prox_rate_avail(struct device *dev,
787 struct device_attribute *attr, char *buf)
788{
789 int i;
790 int pos = 0;
791 for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++)
792 pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]);
793 sprintf(buf + pos - 1, "\n");
794 return pos;
795}
796
797static ssize_t bh1770_get_prox_rate_above(struct device *dev,
798 struct device_attribute *attr, char *buf)
799{
800 struct bh1770_chip *chip = dev_get_drvdata(dev);
801 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]);
802}
803
804static ssize_t bh1770_get_prox_rate_below(struct device *dev,
805 struct device_attribute *attr, char *buf)
806{
807 struct bh1770_chip *chip = dev_get_drvdata(dev);
808 return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]);
809}
810
811static int bh1770_prox_rate_validate(int rate)
812{
813 int i;
814
815 for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++)
816 if (rate >= prox_rates_hz[i])
817 break;
818 return i;
819}
820
821static ssize_t bh1770_set_prox_rate_above(struct device *dev,
822 struct device_attribute *attr,
823 const char *buf, size_t count)
824{
825 struct bh1770_chip *chip = dev_get_drvdata(dev);
826 unsigned long value;
827
828 if (strict_strtoul(buf, 0, &value))
829 return -EINVAL;
830
831 mutex_lock(&chip->mutex);
832 chip->prox_rate_threshold = bh1770_prox_rate_validate(value);
833 mutex_unlock(&chip->mutex);
834 return count;
835}
836
837static ssize_t bh1770_set_prox_rate_below(struct device *dev,
838 struct device_attribute *attr,
839 const char *buf, size_t count)
840{
841 struct bh1770_chip *chip = dev_get_drvdata(dev);
842 unsigned long value;
843
844 if (strict_strtoul(buf, 0, &value))
845 return -EINVAL;
846
847 mutex_lock(&chip->mutex);
848 chip->prox_rate = bh1770_prox_rate_validate(value);
849 mutex_unlock(&chip->mutex);
850 return count;
851}
852
853static ssize_t bh1770_get_prox_thres(struct device *dev,
854 struct device_attribute *attr, char *buf)
855{
856 struct bh1770_chip *chip = dev_get_drvdata(dev);
857 return sprintf(buf, "%d\n", chip->prox_threshold);
858}
859
860static ssize_t bh1770_set_prox_thres(struct device *dev,
861 struct device_attribute *attr,
862 const char *buf, size_t count)
863{
864 struct bh1770_chip *chip = dev_get_drvdata(dev);
865 unsigned long value;
866 int ret;
867
868 if (strict_strtoul(buf, 0, &value))
869 return -EINVAL;
870 if (value > BH1770_PROX_RANGE)
871 return -EINVAL;
872
873 mutex_lock(&chip->mutex);
874 chip->prox_threshold = value;
875 ret = bh1770_prox_set_threshold(chip);
876 mutex_unlock(&chip->mutex);
877 if (ret < 0)
878 return ret;
879 return count;
880}
881
882static ssize_t bh1770_prox_persistence_show(struct device *dev,
883 struct device_attribute *attr, char *buf)
884{
885 struct bh1770_chip *chip = dev_get_drvdata(dev);
886
887 return sprintf(buf, "%u\n", chip->prox_persistence);
888}
889
890static ssize_t bh1770_prox_persistence_store(struct device *dev,
891 struct device_attribute *attr,
892 const char *buf, size_t len)
893{
894 struct bh1770_chip *chip = dev_get_drvdata(dev);
895 unsigned long value;
896
897 if (strict_strtoul(buf, 0, &value))
898 return -EINVAL;
899
900 if (value > BH1770_PROX_MAX_PERSISTENCE)
901 return -EINVAL;
902
903 chip->prox_persistence = value;
904
905 return len;
906}
907
908static ssize_t bh1770_prox_abs_thres_show(struct device *dev,
909 struct device_attribute *attr, char *buf)
910{
911 struct bh1770_chip *chip = dev_get_drvdata(dev);
912 return sprintf(buf, "%u\n", chip->prox_abs_thres);
913}
914
915static ssize_t bh1770_prox_abs_thres_store(struct device *dev,
916 struct device_attribute *attr,
917 const char *buf, size_t len)
918{
919 struct bh1770_chip *chip = dev_get_drvdata(dev);
920 unsigned long value;
921
922 if (strict_strtoul(buf, 0, &value))
923 return -EINVAL;
924
925 if (value > BH1770_PROX_RANGE)
926 return -EINVAL;
927
928 chip->prox_abs_thres = value;
929
930 return len;
931}
932
933static ssize_t bh1770_chip_id_show(struct device *dev,
934 struct device_attribute *attr, char *buf)
935{
936 struct bh1770_chip *chip = dev_get_drvdata(dev);
937 return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision);
938}
939
940static ssize_t bh1770_lux_calib_default_show(struct device *dev,
941 struct device_attribute *attr, char *buf)
942{
943 return sprintf(buf, "%u\n", BH1770_CALIB_SCALER);
944}
945
946static ssize_t bh1770_lux_calib_show(struct device *dev,
947 struct device_attribute *attr, char *buf)
948{
949 struct bh1770_chip *chip = dev_get_drvdata(dev);
950 ssize_t len;
951
952 mutex_lock(&chip->mutex);
953 len = sprintf(buf, "%u\n", chip->lux_calib);
954 mutex_unlock(&chip->mutex);
955 return len;
956}
957
958static ssize_t bh1770_lux_calib_store(struct device *dev,
959 struct device_attribute *attr,
960 const char *buf, size_t len)
961{
962 struct bh1770_chip *chip = dev_get_drvdata(dev);
963 unsigned long value;
964 u32 old_calib;
965 u32 new_corr;
966
967 if (strict_strtoul(buf, 0, &value))
968 return -EINVAL;
969
970 mutex_lock(&chip->mutex);
971 old_calib = chip->lux_calib;
972 chip->lux_calib = value;
973 new_corr = bh1770_get_corr_value(chip);
974 if (new_corr == 0) {
975 chip->lux_calib = old_calib;
976 mutex_unlock(&chip->mutex);
977 return -EINVAL;
978 }
979 chip->lux_corr = new_corr;
980 /* Refresh thresholds on HW after changing correction value */
981 bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi,
982 chip->lux_threshold_lo);
983
984 mutex_unlock(&chip->mutex);
985
986 return len;
987}
988
989static ssize_t bh1770_get_lux_rate_avail(struct device *dev,
990 struct device_attribute *attr, char *buf)
991{
992 int i;
993 int pos = 0;
994 for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++)
995 pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]);
996 sprintf(buf + pos - 1, "\n");
997 return pos;
998}
999
1000static ssize_t bh1770_get_lux_rate(struct device *dev,
1001 struct device_attribute *attr, char *buf)
1002{
1003 struct bh1770_chip *chip = dev_get_drvdata(dev);
1004 return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]);
1005}
1006
1007static ssize_t bh1770_set_lux_rate(struct device *dev,
1008 struct device_attribute *attr,
1009 const char *buf, size_t count)
1010{
1011 struct bh1770_chip *chip = dev_get_drvdata(dev);
1012 unsigned long rate_hz;
1013 int ret, i;
1014
1015 if (strict_strtoul(buf, 0, &rate_hz))
1016 return -EINVAL;
1017
1018 for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++)
1019 if (rate_hz >= lux_rates_hz[i])
1020 break;
1021
1022 mutex_lock(&chip->mutex);
1023 chip->lux_rate_index = i;
1024 ret = bh1770_lux_rate(chip, i);
1025 mutex_unlock(&chip->mutex);
1026
1027 if (ret < 0)
1028 return ret;
1029
1030 return count;
1031}
1032
1033static ssize_t bh1770_get_lux_thresh_above(struct device *dev,
1034 struct device_attribute *attr, char *buf)
1035{
1036 struct bh1770_chip *chip = dev_get_drvdata(dev);
1037 return sprintf(buf, "%d\n", chip->lux_threshold_hi);
1038}
1039
1040static ssize_t bh1770_get_lux_thresh_below(struct device *dev,
1041 struct device_attribute *attr, char *buf)
1042{
1043 struct bh1770_chip *chip = dev_get_drvdata(dev);
1044 return sprintf(buf, "%d\n", chip->lux_threshold_lo);
1045}
1046
1047static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target,
1048 const char *buf)
1049{
1050 int ret = 0;
1051 unsigned long thresh;
1052
1053 if (strict_strtoul(buf, 0, &thresh))
1054 return -EINVAL;
1055
1056 if (thresh > BH1770_LUX_RANGE)
1057 return -EINVAL;
1058
1059 mutex_lock(&chip->mutex);
1060 *target = thresh;
1061 /*
1062 * Don't update values in HW if we are still waiting for
1063 * first interrupt to come after device handle open call.
1064 */
1065 if (!chip->lux_wait_result)
1066 ret = bh1770_lux_update_thresholds(chip,
1067 chip->lux_threshold_hi,
1068 chip->lux_threshold_lo);
1069 mutex_unlock(&chip->mutex);
1070 return ret;
1071
1072}
1073
1074static ssize_t bh1770_set_lux_thresh_above(struct device *dev,
1075 struct device_attribute *attr,
1076 const char *buf, size_t len)
1077{
1078 struct bh1770_chip *chip = dev_get_drvdata(dev);
1079 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf);
1080 if (ret < 0)
1081 return ret;
1082 return len;
1083}
1084
1085static ssize_t bh1770_set_lux_thresh_below(struct device *dev,
1086 struct device_attribute *attr,
1087 const char *buf, size_t len)
1088{
1089 struct bh1770_chip *chip = dev_get_drvdata(dev);
1090 int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf);
1091 if (ret < 0)
1092 return ret;
1093 return len;
1094}
1095
1096static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show,
1097 bh1770_prox_enable_store);
1098static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR,
1099 bh1770_prox_abs_thres_show,
1100 bh1770_prox_abs_thres_store);
1101static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR,
1102 bh1770_get_prox_thres,
1103 bh1770_set_prox_thres);
1104static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL);
1105static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL);
1106static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR,
1107 bh1770_prox_persistence_show,
1108 bh1770_prox_persistence_store);
1109static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR,
1110 bh1770_get_prox_rate_above,
1111 bh1770_set_prox_rate_above);
1112static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR,
1113 bh1770_get_prox_rate_below,
1114 bh1770_set_prox_rate_below);
1115static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL);
1116
1117static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show,
1118 bh1770_lux_calib_store);
1119static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
1120 bh1770_lux_calib_default_show,
1121 NULL);
1122static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL);
1123static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL);
1124static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate,
1125 bh1770_set_lux_rate);
1126static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL);
1127static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
1128 bh1770_get_lux_thresh_above,
1129 bh1770_set_lux_thresh_above);
1130static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
1131 bh1770_get_lux_thresh_below,
1132 bh1770_set_lux_thresh_below);
1133static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL);
1134static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show,
1135 bh1770_power_state_store);
1136
1137
1138static struct attribute *sysfs_attrs[] = {
1139 &dev_attr_lux0_calibscale.attr,
1140 &dev_attr_lux0_calibscale_default.attr,
1141 &dev_attr_lux0_input.attr,
1142 &dev_attr_lux0_sensor_range.attr,
1143 &dev_attr_lux0_rate.attr,
1144 &dev_attr_lux0_rate_avail.attr,
1145 &dev_attr_lux0_thresh_above_value.attr,
1146 &dev_attr_lux0_thresh_below_value.attr,
1147 &dev_attr_prox0_raw.attr,
1148 &dev_attr_prox0_sensor_range.attr,
1149 &dev_attr_prox0_raw_en.attr,
1150 &dev_attr_prox0_thresh_above_count.attr,
1151 &dev_attr_prox0_rate_above.attr,
1152 &dev_attr_prox0_rate_below.attr,
1153 &dev_attr_prox0_rate_avail.attr,
1154 &dev_attr_prox0_thresh_above0_value.attr,
1155 &dev_attr_prox0_thresh_above1_value.attr,
1156 &dev_attr_chip_id.attr,
1157 &dev_attr_power_state.attr,
1158 NULL
1159};
1160
1161static struct attribute_group bh1770_attribute_group = {
1162 .attrs = sysfs_attrs
1163};
1164
1165static int __devinit bh1770_probe(struct i2c_client *client,
1166 const struct i2c_device_id *id)
1167{
1168 struct bh1770_chip *chip;
1169 int err;
1170
1171 chip = kzalloc(sizeof *chip, GFP_KERNEL);
1172 if (!chip)
1173 return -ENOMEM;
1174
1175 i2c_set_clientdata(client, chip);
1176 chip->client = client;
1177
1178 mutex_init(&chip->mutex);
1179 init_waitqueue_head(&chip->wait);
1180 INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work);
1181
1182 if (client->dev.platform_data == NULL) {
1183 dev_err(&client->dev, "platform data is mandatory\n");
1184 err = -EINVAL;
1185 goto fail1;
1186 }
1187
1188 chip->pdata = client->dev.platform_data;
1189 chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE;
1190 chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE;
1191 chip->lux_threshold_lo = BH1770_LUX_DEF_THRES;
1192 chip->lux_threshold_hi = BH1770_LUX_DEF_THRES;
1193
1194 if (chip->pdata->glass_attenuation == 0)
1195 chip->lux_ga = BH1770_NEUTRAL_GA;
1196 else
1197 chip->lux_ga = chip->pdata->glass_attenuation;
1198
1199 chip->prox_threshold = BH1770_PROX_DEF_THRES;
1200 chip->prox_led = chip->pdata->led_def_curr;
1201 chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES;
1202 chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE;
1203 chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH;
1204 chip->prox_rate = BH1770_PROX_DEFAULT_RATE;
1205 chip->prox_data = 0;
1206
1207 chip->regs[0].supply = reg_vcc;
1208 chip->regs[1].supply = reg_vleds;
1209
1210 err = regulator_bulk_get(&client->dev,
1211 ARRAY_SIZE(chip->regs), chip->regs);
1212 if (err < 0) {
1213 dev_err(&client->dev, "Cannot get regulators\n");
1214 goto fail1;
1215 }
1216
1217 err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
1218 chip->regs);
1219 if (err < 0) {
1220 dev_err(&client->dev, "Cannot enable regulators\n");
1221 goto fail2;
1222 }
1223
1224 usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2);
1225 err = bh1770_detect(chip);
1226 if (err < 0)
1227 goto fail3;
1228
1229 /* Start chip */
1230 bh1770_chip_on(chip);
1231 pm_runtime_set_active(&client->dev);
1232 pm_runtime_enable(&client->dev);
1233
1234 chip->lux_corr = bh1770_get_corr_value(chip);
1235 if (chip->lux_corr == 0) {
1236 dev_err(&client->dev, "Improper correction values\n");
1237 err = -EINVAL;
1238 goto fail3;
1239 }
1240
1241 if (chip->pdata->setup_resources) {
1242 err = chip->pdata->setup_resources();
1243 if (err) {
1244 err = -EINVAL;
1245 goto fail3;
1246 }
1247 }
1248
1249 err = sysfs_create_group(&chip->client->dev.kobj,
1250 &bh1770_attribute_group);
1251 if (err < 0) {
1252 dev_err(&chip->client->dev, "Sysfs registration failed\n");
1253 goto fail4;
1254 }
1255
1256 /*
1257 * Chip needs level triggered interrupt to work. However,
1258 * level triggering doesn't work always correctly with power
1259 * management. Select both
1260 */
1261 err = request_threaded_irq(client->irq, NULL,
1262 bh1770_irq,
1263 IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
1264 IRQF_TRIGGER_LOW,
1265 "bh1770", chip);
1266 if (err) {
1267 dev_err(&client->dev, "could not get IRQ %d\n",
1268 client->irq);
1269 goto fail5;
1270 }
1271 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
1272 return err;
1273fail5:
1274 sysfs_remove_group(&chip->client->dev.kobj,
1275 &bh1770_attribute_group);
1276fail4:
1277 if (chip->pdata->release_resources)
1278 chip->pdata->release_resources();
1279fail3:
1280 regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
1281fail2:
1282 regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
1283fail1:
1284 kfree(chip);
1285 return err;
1286}
1287
1288static int __devexit bh1770_remove(struct i2c_client *client)
1289{
1290 struct bh1770_chip *chip = i2c_get_clientdata(client);
1291
1292 free_irq(client->irq, chip);
1293
1294 sysfs_remove_group(&chip->client->dev.kobj,
1295 &bh1770_attribute_group);
1296
1297 if (chip->pdata->release_resources)
1298 chip->pdata->release_resources();
1299
1300 cancel_delayed_work_sync(&chip->prox_work);
1301
1302 if (!pm_runtime_suspended(&client->dev))
1303 bh1770_chip_off(chip);
1304
1305 pm_runtime_disable(&client->dev);
1306 pm_runtime_set_suspended(&client->dev);
1307
1308 regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
1309 kfree(chip);
1310 return 0;
1311}
1312
1313#ifdef CONFIG_PM
1314static int bh1770_suspend(struct device *dev)
1315{
1316 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1317 struct bh1770_chip *chip = i2c_get_clientdata(client);
1318
1319 bh1770_chip_off(chip);
1320
1321 return 0;
1322}
1323
1324static int bh1770_resume(struct device *dev)
1325{
1326 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1327 struct bh1770_chip *chip = i2c_get_clientdata(client);
1328 int ret = 0;
1329
1330 bh1770_chip_on(chip);
1331
1332 if (!pm_runtime_suspended(dev)) {
1333 /*
1334 * If we were enabled at suspend time, it is expected
1335 * everything works nice and smoothly
1336 */
1337 ret = bh1770_lux_rate(chip, chip->lux_rate_index);
1338 ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE);
1339
1340 /* This causes interrupt after the next measurement cycle */
1341 bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES,
1342 BH1770_LUX_DEF_THRES);
1343 /* Inform that we are waiting for a result from ALS */
1344 chip->lux_wait_result = true;
1345 bh1770_prox_mode_control(chip);
1346 }
1347 return ret;
1348}
1349
1350#else
1351#define bh1770_suspend NULL
1352#define bh1770_shutdown NULL
1353#define bh1770_resume NULL
1354#endif
1355
1356#ifdef CONFIG_PM_RUNTIME
1357static int bh1770_runtime_suspend(struct device *dev)
1358{
1359 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1360 struct bh1770_chip *chip = i2c_get_clientdata(client);
1361
1362 bh1770_chip_off(chip);
1363
1364 return 0;
1365}
1366
1367static int bh1770_runtime_resume(struct device *dev)
1368{
1369 struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1370 struct bh1770_chip *chip = i2c_get_clientdata(client);
1371
1372 bh1770_chip_on(chip);
1373
1374 return 0;
1375}
1376#endif
1377
1378static const struct i2c_device_id bh1770_id[] = {
1379 {"bh1770glc", 0 },
1380 {"sfh7770", 0 },
1381 {}
1382};
1383
1384MODULE_DEVICE_TABLE(i2c, bh1770_id);
1385
1386static const struct dev_pm_ops bh1770_pm_ops = {
1387 SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume)
1388 SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL)
1389};
1390
1391static struct i2c_driver bh1770_driver = {
1392 .driver = {
1393 .name = "bh1770glc",
1394 .owner = THIS_MODULE,
1395 .pm = &bh1770_pm_ops,
1396 },
1397 .probe = bh1770_probe,
1398 .remove = __devexit_p(bh1770_remove),
1399 .id_table = bh1770_id,
1400};
1401
Axel Lina64fe2e2012-01-22 15:36:45 +08001402module_i2c_driver(bh1770_driver);
Samu Onkalo190420a2010-10-26 14:22:37 -07001403
1404MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor");
1405MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
1406MODULE_LICENSE("GPL v2");