1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver. |
4 | * Chip is combined proximity and ambient light sensor. |
5 | * |
6 | * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
7 | * |
8 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> |
9 | */ |
10 | |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> |
13 | #include <linux/i2c.h> |
14 | #include <linux/interrupt.h> |
15 | #include <linux/mutex.h> |
16 | #include <linux/platform_data/bh1770glc.h> |
17 | #include <linux/regulator/consumer.h> |
18 | #include <linux/pm_runtime.h> |
19 | #include <linux/workqueue.h> |
20 | #include <linux/delay.h> |
21 | #include <linux/wait.h> |
22 | #include <linux/slab.h> |
23 | |
24 | #define BH1770_ALS_CONTROL 0x80 /* ALS operation mode control */ |
25 | #define BH1770_PS_CONTROL 0x81 /* PS operation mode control */ |
26 | #define BH1770_I_LED 0x82 /* active LED and LED1, LED2 current */ |
27 | #define BH1770_I_LED3 0x83 /* LED3 current setting */ |
28 | #define BH1770_ALS_PS_MEAS 0x84 /* Forced mode trigger */ |
29 | #define BH1770_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */ |
30 | #define BH1770_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */ |
31 | #define BH1770_PART_ID 0x8a /* Part number and revision ID */ |
32 | #define BH1770_MANUFACT_ID 0x8b /* Manufacturerer ID */ |
33 | #define BH1770_ALS_DATA_0 0x8c /* ALS DATA low byte */ |
34 | #define BH1770_ALS_DATA_1 0x8d /* ALS DATA high byte */ |
35 | #define BH1770_ALS_PS_STATUS 0x8e /* Measurement data and int status */ |
36 | #define BH1770_PS_DATA_LED1 0x8f /* PS data from LED1 */ |
37 | #define BH1770_PS_DATA_LED2 0x90 /* PS data from LED2 */ |
38 | #define BH1770_PS_DATA_LED3 0x91 /* PS data from LED3 */ |
39 | #define BH1770_INTERRUPT 0x92 /* Interrupt setting */ |
40 | #define BH1770_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */ |
41 | #define BH1770_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */ |
42 | #define BH1770_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */ |
43 | #define BH1770_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */ |
44 | #define BH1770_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */ |
45 | #define BH1770_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */ |
46 | #define BH1770_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */ |
47 | |
48 | /* MANUFACT_ID */ |
49 | #define BH1770_MANUFACT_ROHM 0x01 |
50 | #define BH1770_MANUFACT_OSRAM 0x03 |
51 | |
52 | /* PART_ID */ |
53 | #define BH1770_PART 0x90 |
54 | #define BH1770_PART_MASK 0xf0 |
55 | #define BH1770_REV_MASK 0x0f |
56 | #define BH1770_REV_SHIFT 0 |
57 | #define BH1770_REV_0 0x00 |
58 | #define BH1770_REV_1 0x01 |
59 | |
60 | /* Operating modes for both */ |
61 | #define BH1770_STANDBY 0x00 |
62 | #define BH1770_FORCED 0x02 |
63 | #define BH1770_STANDALONE 0x03 |
64 | #define BH1770_SWRESET (0x01 << 2) |
65 | |
66 | #define BH1770_PS_TRIG_MEAS (1 << 0) |
67 | #define BH1770_ALS_TRIG_MEAS (1 << 1) |
68 | |
69 | /* Interrupt control */ |
70 | #define BH1770_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */ |
71 | #define BH1770_INT_POLARITY (1 << 2) /* 1 = active high */ |
72 | #define BH1770_INT_ALS_ENA (1 << 1) |
73 | #define BH1770_INT_PS_ENA (1 << 0) |
74 | |
75 | /* Interrupt status */ |
76 | #define BH1770_INT_LED1_DATA (1 << 0) |
77 | #define BH1770_INT_LED1_INT (1 << 1) |
78 | #define BH1770_INT_LED2_DATA (1 << 2) |
79 | #define BH1770_INT_LED2_INT (1 << 3) |
80 | #define BH1770_INT_LED3_DATA (1 << 4) |
81 | #define BH1770_INT_LED3_INT (1 << 5) |
82 | #define BH1770_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5)) |
83 | #define BH1770_INT_ALS_DATA (1 << 6) |
84 | #define BH1770_INT_ALS_INT (1 << 7) |
85 | |
86 | /* Led channels */ |
87 | #define BH1770_LED1 0x00 |
88 | |
89 | #define BH1770_DISABLE 0 |
90 | #define BH1770_ENABLE 1 |
91 | #define BH1770_PROX_CHANNELS 1 |
92 | |
93 | #define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */ |
94 | #define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */ |
95 | #define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */ |
96 | #define BH1770_STARTUP_DELAY 50 |
97 | #define BH1770_RESET_TIME 10 |
98 | #define BH1770_TIMEOUT 2100 /* Timeout in 2.1 seconds */ |
99 | |
100 | #define BH1770_LUX_RANGE 65535 |
101 | #define BH1770_PROX_RANGE 255 |
102 | #define BH1770_COEF_SCALER 1024 |
103 | #define BH1770_CALIB_SCALER 8192 |
104 | #define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER) |
105 | #define BH1770_LUX_DEF_THRES 1000 |
106 | #define BH1770_PROX_DEF_THRES 70 |
107 | #define BH1770_PROX_DEF_ABS_THRES 100 |
108 | #define BH1770_DEFAULT_PERSISTENCE 10 |
109 | #define BH1770_PROX_MAX_PERSISTENCE 50 |
110 | #define BH1770_LUX_GA_SCALE 16384 |
111 | #define BH1770_LUX_CF_SCALE 2048 /* CF ChipFactor */ |
112 | #define BH1770_NEUTRAL_CF BH1770_LUX_CF_SCALE |
113 | #define BH1770_LUX_CORR_SCALE 4096 |
114 | |
115 | #define PROX_ABOVE_THRESHOLD 1 |
116 | #define PROX_BELOW_THRESHOLD 0 |
117 | |
118 | #define PROX_IGNORE_LUX_LIMIT 500 |
119 | |
120 | struct bh1770_chip { |
121 | struct bh1770_platform_data *pdata; |
122 | char chipname[10]; |
123 | u8 revision; |
124 | struct i2c_client *client; |
125 | struct regulator_bulk_data regs[2]; |
126 | struct mutex mutex; /* avoid parallel access */ |
127 | wait_queue_head_t wait; |
128 | |
129 | bool int_mode_prox; |
130 | bool int_mode_lux; |
131 | struct delayed_work prox_work; |
132 | u32 lux_cf; /* Chip specific factor */ |
133 | u32 lux_ga; |
134 | u32 lux_calib; |
135 | int lux_rate_index; |
136 | u32 lux_corr; |
137 | u16 lux_data_raw; |
138 | u16 lux_threshold_hi; |
139 | u16 lux_threshold_lo; |
140 | u16 lux_thres_hi_onchip; |
141 | u16 lux_thres_lo_onchip; |
142 | bool lux_wait_result; |
143 | |
144 | int prox_enable_count; |
145 | u16 prox_coef; |
146 | u16 prox_const; |
147 | int prox_rate; |
148 | int prox_rate_threshold; |
149 | u8 prox_persistence; |
150 | u8 prox_persistence_counter; |
151 | u8 prox_data; |
152 | u8 prox_threshold; |
153 | u8 prox_threshold_hw; |
154 | bool prox_force_update; |
155 | u8 prox_abs_thres; |
156 | u8 prox_led; |
157 | }; |
158 | |
159 | static const char reg_vcc[] = "Vcc" ; |
160 | static const char reg_vleds[] = "Vleds" ; |
161 | |
162 | /* |
163 | * Supported stand alone rates in ms from chip data sheet |
164 | * {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000}; |
165 | */ |
166 | static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2}; |
167 | static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500}; |
168 | |
169 | /* |
170 | * Supported stand alone rates in ms from chip data sheet |
171 | * {100, 200, 500, 1000, 2000}; |
172 | */ |
173 | static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0}; |
174 | |
175 | /* |
176 | * interrupt control functions are called while keeping chip->mutex |
177 | * excluding module probe / remove |
178 | */ |
179 | static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip, |
180 | int lux) |
181 | { |
182 | chip->int_mode_lux = lux; |
183 | /* Set interrupt modes, interrupt active low, latched */ |
184 | return i2c_smbus_write_byte_data(client: chip->client, |
185 | BH1770_INTERRUPT, |
186 | value: (lux << 1) | chip->int_mode_prox); |
187 | } |
188 | |
189 | static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip, |
190 | int ps) |
191 | { |
192 | chip->int_mode_prox = ps; |
193 | return i2c_smbus_write_byte_data(client: chip->client, |
194 | BH1770_INTERRUPT, |
195 | value: (chip->int_mode_lux << 1) | (ps << 0)); |
196 | } |
197 | |
198 | /* chip->mutex is always kept here */ |
199 | static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index) |
200 | { |
201 | /* sysfs may call this when the chip is powered off */ |
202 | if (pm_runtime_suspended(dev: &chip->client->dev)) |
203 | return 0; |
204 | |
205 | /* Proper proximity response needs fastest lux rate (100ms) */ |
206 | if (chip->prox_enable_count) |
207 | rate_index = 0; |
208 | |
209 | return i2c_smbus_write_byte_data(client: chip->client, |
210 | BH1770_ALS_MEAS_RATE, |
211 | value: rate_index); |
212 | } |
213 | |
214 | static int bh1770_prox_rate(struct bh1770_chip *chip, int mode) |
215 | { |
216 | int rate; |
217 | |
218 | rate = (mode == PROX_ABOVE_THRESHOLD) ? |
219 | chip->prox_rate_threshold : chip->prox_rate; |
220 | |
221 | return i2c_smbus_write_byte_data(client: chip->client, |
222 | BH1770_PS_MEAS_RATE, |
223 | value: rate); |
224 | } |
225 | |
226 | /* InfraredLED is controlled by the chip during proximity scanning */ |
227 | static inline int bh1770_led_cfg(struct bh1770_chip *chip) |
228 | { |
229 | /* LED cfg, current for leds 1 and 2 */ |
230 | return i2c_smbus_write_byte_data(client: chip->client, |
231 | BH1770_I_LED, |
232 | value: (BH1770_LED1 << 6) | |
233 | (BH1770_LED_5mA << 3) | |
234 | chip->prox_led); |
235 | } |
236 | |
237 | /* |
238 | * Following two functions converts raw ps values from HW to normalized |
239 | * values. Purpose is to compensate differences between different sensor |
240 | * versions and variants so that result means about the same between |
241 | * versions. |
242 | */ |
243 | static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw) |
244 | { |
245 | u16 adjusted; |
246 | adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) / |
247 | BH1770_COEF_SCALER); |
248 | if (adjusted > BH1770_PROX_RANGE) |
249 | adjusted = BH1770_PROX_RANGE; |
250 | return adjusted; |
251 | } |
252 | |
253 | static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps) |
254 | { |
255 | u16 raw; |
256 | |
257 | raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef); |
258 | if (raw > chip->prox_const) |
259 | raw = raw - chip->prox_const; |
260 | else |
261 | raw = 0; |
262 | return raw; |
263 | } |
264 | |
265 | /* |
266 | * Following two functions converts raw lux values from HW to normalized |
267 | * values. Purpose is to compensate differences between different sensor |
268 | * versions and variants so that result means about the same between |
269 | * versions. Chip->mutex is kept when this is called. |
270 | */ |
271 | static int bh1770_prox_set_threshold(struct bh1770_chip *chip) |
272 | { |
273 | u8 tmp = 0; |
274 | |
275 | /* sysfs may call this when the chip is powered off */ |
276 | if (pm_runtime_suspended(dev: &chip->client->dev)) |
277 | return 0; |
278 | |
279 | tmp = bh1770_psadjusted_to_raw(chip, ps: chip->prox_threshold); |
280 | chip->prox_threshold_hw = tmp; |
281 | |
282 | return i2c_smbus_write_byte_data(client: chip->client, BH1770_PS_TH_LED1, |
283 | value: tmp); |
284 | } |
285 | |
286 | static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw) |
287 | { |
288 | u32 lux; |
289 | lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE; |
290 | return min(lux, (u32)BH1770_LUX_RANGE); |
291 | } |
292 | |
293 | static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip, |
294 | u16 adjusted) |
295 | { |
296 | return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr; |
297 | } |
298 | |
299 | /* chip->mutex is kept when this is called */ |
300 | static int bh1770_lux_update_thresholds(struct bh1770_chip *chip, |
301 | u16 threshold_hi, u16 threshold_lo) |
302 | { |
303 | u8 data[4]; |
304 | int ret; |
305 | |
306 | /* sysfs may call this when the chip is powered off */ |
307 | if (pm_runtime_suspended(dev: &chip->client->dev)) |
308 | return 0; |
309 | |
310 | /* |
311 | * Compensate threshold values with the correction factors if not |
312 | * set to minimum or maximum. |
313 | * Min & max values disables interrupts. |
314 | */ |
315 | if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0) |
316 | threshold_hi = bh1770_lux_adjusted_to_raw(chip, adjusted: threshold_hi); |
317 | |
318 | if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0) |
319 | threshold_lo = bh1770_lux_adjusted_to_raw(chip, adjusted: threshold_lo); |
320 | |
321 | if (chip->lux_thres_hi_onchip == threshold_hi && |
322 | chip->lux_thres_lo_onchip == threshold_lo) |
323 | return 0; |
324 | |
325 | chip->lux_thres_hi_onchip = threshold_hi; |
326 | chip->lux_thres_lo_onchip = threshold_lo; |
327 | |
328 | data[0] = threshold_hi; |
329 | data[1] = threshold_hi >> 8; |
330 | data[2] = threshold_lo; |
331 | data[3] = threshold_lo >> 8; |
332 | |
333 | ret = i2c_smbus_write_i2c_block_data(client: chip->client, |
334 | BH1770_ALS_TH_UP_0, |
335 | ARRAY_SIZE(data), |
336 | values: data); |
337 | return ret; |
338 | } |
339 | |
340 | static int bh1770_lux_get_result(struct bh1770_chip *chip) |
341 | { |
342 | u16 data; |
343 | int ret; |
344 | |
345 | ret = i2c_smbus_read_byte_data(client: chip->client, BH1770_ALS_DATA_0); |
346 | if (ret < 0) |
347 | return ret; |
348 | |
349 | data = ret & 0xff; |
350 | ret = i2c_smbus_read_byte_data(client: chip->client, BH1770_ALS_DATA_1); |
351 | if (ret < 0) |
352 | return ret; |
353 | |
354 | chip->lux_data_raw = data | ((ret & 0xff) << 8); |
355 | |
356 | return 0; |
357 | } |
358 | |
359 | /* Calculate correction value which contains chip and device specific parts */ |
360 | static u32 bh1770_get_corr_value(struct bh1770_chip *chip) |
361 | { |
362 | u32 tmp; |
363 | /* Impact of glass attenuation correction */ |
364 | tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE; |
365 | /* Impact of chip factor correction */ |
366 | tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE; |
367 | /* Impact of Device specific calibration correction */ |
368 | tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER; |
369 | return tmp; |
370 | } |
371 | |
372 | static int bh1770_lux_read_result(struct bh1770_chip *chip) |
373 | { |
374 | bh1770_lux_get_result(chip); |
375 | return bh1770_lux_raw_to_adjusted(chip, raw: chip->lux_data_raw); |
376 | } |
377 | |
378 | /* |
379 | * Chip on / off functions are called while keeping mutex except probe |
380 | * or remove phase |
381 | */ |
382 | static int bh1770_chip_on(struct bh1770_chip *chip) |
383 | { |
384 | int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs), |
385 | consumers: chip->regs); |
386 | if (ret < 0) |
387 | return ret; |
388 | |
389 | usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); |
390 | |
391 | /* Reset the chip */ |
392 | i2c_smbus_write_byte_data(client: chip->client, BH1770_ALS_CONTROL, |
393 | BH1770_SWRESET); |
394 | usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2); |
395 | |
396 | /* |
397 | * ALS is started always since proximity needs als results |
398 | * for realibility estimation. |
399 | * Let's assume dark until the first ALS measurement is ready. |
400 | */ |
401 | chip->lux_data_raw = 0; |
402 | chip->prox_data = 0; |
403 | ret = i2c_smbus_write_byte_data(client: chip->client, |
404 | BH1770_ALS_CONTROL, BH1770_STANDALONE); |
405 | |
406 | /* Assume reset defaults */ |
407 | chip->lux_thres_hi_onchip = BH1770_LUX_RANGE; |
408 | chip->lux_thres_lo_onchip = 0; |
409 | |
410 | return ret; |
411 | } |
412 | |
413 | static void bh1770_chip_off(struct bh1770_chip *chip) |
414 | { |
415 | i2c_smbus_write_byte_data(client: chip->client, |
416 | BH1770_INTERRUPT, BH1770_DISABLE); |
417 | i2c_smbus_write_byte_data(client: chip->client, |
418 | BH1770_ALS_CONTROL, BH1770_STANDBY); |
419 | i2c_smbus_write_byte_data(client: chip->client, |
420 | BH1770_PS_CONTROL, BH1770_STANDBY); |
421 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), consumers: chip->regs); |
422 | } |
423 | |
424 | /* chip->mutex is kept when this is called */ |
425 | static int bh1770_prox_mode_control(struct bh1770_chip *chip) |
426 | { |
427 | if (chip->prox_enable_count) { |
428 | chip->prox_force_update = true; /* Force immediate update */ |
429 | |
430 | bh1770_lux_rate(chip, rate_index: chip->lux_rate_index); |
431 | bh1770_prox_set_threshold(chip); |
432 | bh1770_led_cfg(chip); |
433 | bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD); |
434 | bh1770_prox_interrupt_control(chip, BH1770_ENABLE); |
435 | i2c_smbus_write_byte_data(client: chip->client, |
436 | BH1770_PS_CONTROL, BH1770_STANDALONE); |
437 | } else { |
438 | chip->prox_data = 0; |
439 | bh1770_lux_rate(chip, rate_index: chip->lux_rate_index); |
440 | bh1770_prox_interrupt_control(chip, BH1770_DISABLE); |
441 | i2c_smbus_write_byte_data(client: chip->client, |
442 | BH1770_PS_CONTROL, BH1770_STANDBY); |
443 | } |
444 | return 0; |
445 | } |
446 | |
447 | /* chip->mutex is kept when this is called */ |
448 | static int bh1770_prox_read_result(struct bh1770_chip *chip) |
449 | { |
450 | int ret; |
451 | bool above; |
452 | u8 mode; |
453 | |
454 | ret = i2c_smbus_read_byte_data(client: chip->client, BH1770_PS_DATA_LED1); |
455 | if (ret < 0) |
456 | goto out; |
457 | |
458 | if (ret > chip->prox_threshold_hw) |
459 | above = true; |
460 | else |
461 | above = false; |
462 | |
463 | /* |
464 | * when ALS levels goes above limit, proximity result may be |
465 | * false proximity. Thus ignore the result. With real proximity |
466 | * there is a shadow causing low als levels. |
467 | */ |
468 | if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT) |
469 | ret = 0; |
470 | |
471 | chip->prox_data = bh1770_psraw_to_adjusted(chip, psraw: ret); |
472 | |
473 | /* Strong proximity level or force mode requires immediate response */ |
474 | if (chip->prox_data >= chip->prox_abs_thres || |
475 | chip->prox_force_update) |
476 | chip->prox_persistence_counter = chip->prox_persistence; |
477 | |
478 | chip->prox_force_update = false; |
479 | |
480 | /* Persistence filttering to reduce false proximity events */ |
481 | if (likely(above)) { |
482 | if (chip->prox_persistence_counter < chip->prox_persistence) { |
483 | chip->prox_persistence_counter++; |
484 | ret = -ENODATA; |
485 | } else { |
486 | mode = PROX_ABOVE_THRESHOLD; |
487 | ret = 0; |
488 | } |
489 | } else { |
490 | chip->prox_persistence_counter = 0; |
491 | mode = PROX_BELOW_THRESHOLD; |
492 | chip->prox_data = 0; |
493 | ret = 0; |
494 | } |
495 | |
496 | /* Set proximity detection rate based on above or below value */ |
497 | if (ret == 0) { |
498 | bh1770_prox_rate(chip, mode); |
499 | sysfs_notify(kobj: &chip->client->dev.kobj, NULL, attr: "prox0_raw" ); |
500 | } |
501 | out: |
502 | return ret; |
503 | } |
504 | |
505 | static int bh1770_detect(struct bh1770_chip *chip) |
506 | { |
507 | struct i2c_client *client = chip->client; |
508 | s32 ret; |
509 | u8 manu, part; |
510 | |
511 | ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID); |
512 | if (ret < 0) |
513 | goto error; |
514 | manu = (u8)ret; |
515 | |
516 | ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID); |
517 | if (ret < 0) |
518 | goto error; |
519 | part = (u8)ret; |
520 | |
521 | chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT; |
522 | chip->prox_coef = BH1770_COEF_SCALER; |
523 | chip->prox_const = 0; |
524 | chip->lux_cf = BH1770_NEUTRAL_CF; |
525 | |
526 | if ((manu == BH1770_MANUFACT_ROHM) && |
527 | ((part & BH1770_PART_MASK) == BH1770_PART)) { |
528 | snprintf(buf: chip->chipname, size: sizeof(chip->chipname), fmt: "BH1770GLC" ); |
529 | return 0; |
530 | } |
531 | |
532 | if ((manu == BH1770_MANUFACT_OSRAM) && |
533 | ((part & BH1770_PART_MASK) == BH1770_PART)) { |
534 | snprintf(buf: chip->chipname, size: sizeof(chip->chipname), fmt: "SFH7770" ); |
535 | /* Values selected by comparing different versions */ |
536 | chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */ |
537 | chip->prox_const = 40; |
538 | return 0; |
539 | } |
540 | |
541 | ret = -ENODEV; |
542 | error: |
543 | dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n" ); |
544 | |
545 | return ret; |
546 | } |
547 | |
548 | /* |
549 | * This work is re-scheduled at every proximity interrupt. |
550 | * If this work is running, it means that there hasn't been any |
551 | * proximity interrupt in time. Situation is handled as no-proximity. |
552 | * It would be nice to have low-threshold interrupt or interrupt |
553 | * when measurement and hi-threshold are both 0. But neither of those exists. |
554 | * This is a workaroud for missing HW feature. |
555 | */ |
556 | |
557 | static void bh1770_prox_work(struct work_struct *work) |
558 | { |
559 | struct bh1770_chip *chip = |
560 | container_of(work, struct bh1770_chip, prox_work.work); |
561 | |
562 | mutex_lock(&chip->mutex); |
563 | bh1770_prox_read_result(chip); |
564 | mutex_unlock(lock: &chip->mutex); |
565 | } |
566 | |
567 | /* This is threaded irq handler */ |
568 | static irqreturn_t bh1770_irq(int irq, void *data) |
569 | { |
570 | struct bh1770_chip *chip = data; |
571 | int status; |
572 | int rate = 0; |
573 | |
574 | mutex_lock(&chip->mutex); |
575 | status = i2c_smbus_read_byte_data(client: chip->client, BH1770_ALS_PS_STATUS); |
576 | |
577 | /* Acknowledge interrupt by reading this register */ |
578 | i2c_smbus_read_byte_data(client: chip->client, BH1770_INTERRUPT); |
579 | |
580 | /* |
581 | * Check if there is fresh data available for als. |
582 | * If this is the very first data, update thresholds after that. |
583 | */ |
584 | if (status & BH1770_INT_ALS_DATA) { |
585 | bh1770_lux_get_result(chip); |
586 | if (unlikely(chip->lux_wait_result)) { |
587 | chip->lux_wait_result = false; |
588 | wake_up(&chip->wait); |
589 | bh1770_lux_update_thresholds(chip, |
590 | threshold_hi: chip->lux_threshold_hi, |
591 | threshold_lo: chip->lux_threshold_lo); |
592 | } |
593 | } |
594 | |
595 | /* Disable interrupt logic to guarantee acknowledgement */ |
596 | i2c_smbus_write_byte_data(client: chip->client, BH1770_INTERRUPT, |
597 | value: (0 << 1) | (0 << 0)); |
598 | |
599 | if ((status & BH1770_INT_ALS_INT)) |
600 | sysfs_notify(kobj: &chip->client->dev.kobj, NULL, attr: "lux0_input" ); |
601 | |
602 | if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) { |
603 | rate = prox_rates_ms[chip->prox_rate_threshold]; |
604 | bh1770_prox_read_result(chip); |
605 | } |
606 | |
607 | /* Re-enable interrupt logic */ |
608 | i2c_smbus_write_byte_data(client: chip->client, BH1770_INTERRUPT, |
609 | value: (chip->int_mode_lux << 1) | |
610 | (chip->int_mode_prox << 0)); |
611 | mutex_unlock(lock: &chip->mutex); |
612 | |
613 | /* |
614 | * Can't cancel work while keeping mutex since the work uses the |
615 | * same mutex. |
616 | */ |
617 | if (rate) { |
618 | /* |
619 | * Simulate missing no-proximity interrupt 50ms after the |
620 | * next expected interrupt time. |
621 | */ |
622 | cancel_delayed_work_sync(dwork: &chip->prox_work); |
623 | schedule_delayed_work(dwork: &chip->prox_work, |
624 | delay: msecs_to_jiffies(m: rate + 50)); |
625 | } |
626 | return IRQ_HANDLED; |
627 | } |
628 | |
629 | static ssize_t bh1770_power_state_store(struct device *dev, |
630 | struct device_attribute *attr, |
631 | const char *buf, size_t count) |
632 | { |
633 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
634 | unsigned long value; |
635 | ssize_t ret; |
636 | |
637 | ret = kstrtoul(s: buf, base: 0, res: &value); |
638 | if (ret) |
639 | return ret; |
640 | |
641 | mutex_lock(&chip->mutex); |
642 | if (value) { |
643 | pm_runtime_get_sync(dev); |
644 | |
645 | ret = bh1770_lux_rate(chip, rate_index: chip->lux_rate_index); |
646 | if (ret < 0) { |
647 | pm_runtime_put(dev); |
648 | goto leave; |
649 | } |
650 | |
651 | ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE); |
652 | if (ret < 0) { |
653 | pm_runtime_put(dev); |
654 | goto leave; |
655 | } |
656 | |
657 | /* This causes interrupt after the next measurement cycle */ |
658 | bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, |
659 | BH1770_LUX_DEF_THRES); |
660 | /* Inform that we are waiting for a result from ALS */ |
661 | chip->lux_wait_result = true; |
662 | bh1770_prox_mode_control(chip); |
663 | } else if (!pm_runtime_suspended(dev)) { |
664 | pm_runtime_put(dev); |
665 | } |
666 | ret = count; |
667 | leave: |
668 | mutex_unlock(lock: &chip->mutex); |
669 | return ret; |
670 | } |
671 | |
672 | static ssize_t bh1770_power_state_show(struct device *dev, |
673 | struct device_attribute *attr, char *buf) |
674 | { |
675 | return sprintf(buf, fmt: "%d\n" , !pm_runtime_suspended(dev)); |
676 | } |
677 | |
678 | static ssize_t bh1770_lux_result_show(struct device *dev, |
679 | struct device_attribute *attr, char *buf) |
680 | { |
681 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
682 | ssize_t ret; |
683 | long timeout; |
684 | |
685 | if (pm_runtime_suspended(dev)) |
686 | return -EIO; /* Chip is not enabled at all */ |
687 | |
688 | timeout = wait_event_interruptible_timeout(chip->wait, |
689 | !chip->lux_wait_result, |
690 | msecs_to_jiffies(BH1770_TIMEOUT)); |
691 | if (!timeout) |
692 | return -EIO; |
693 | |
694 | mutex_lock(&chip->mutex); |
695 | ret = sprintf(buf, fmt: "%d\n" , bh1770_lux_read_result(chip)); |
696 | mutex_unlock(lock: &chip->mutex); |
697 | |
698 | return ret; |
699 | } |
700 | |
701 | static ssize_t bh1770_lux_range_show(struct device *dev, |
702 | struct device_attribute *attr, char *buf) |
703 | { |
704 | return sprintf(buf, fmt: "%d\n" , BH1770_LUX_RANGE); |
705 | } |
706 | |
707 | static ssize_t bh1770_prox_enable_store(struct device *dev, |
708 | struct device_attribute *attr, |
709 | const char *buf, size_t count) |
710 | { |
711 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
712 | unsigned long value; |
713 | int ret; |
714 | |
715 | ret = kstrtoul(s: buf, base: 0, res: &value); |
716 | if (ret) |
717 | return ret; |
718 | |
719 | mutex_lock(&chip->mutex); |
720 | /* Assume no proximity. Sensor will tell real state soon */ |
721 | if (!chip->prox_enable_count) |
722 | chip->prox_data = 0; |
723 | |
724 | if (value) |
725 | chip->prox_enable_count++; |
726 | else if (chip->prox_enable_count > 0) |
727 | chip->prox_enable_count--; |
728 | else |
729 | goto leave; |
730 | |
731 | /* Run control only when chip is powered on */ |
732 | if (!pm_runtime_suspended(dev)) |
733 | bh1770_prox_mode_control(chip); |
734 | leave: |
735 | mutex_unlock(lock: &chip->mutex); |
736 | return count; |
737 | } |
738 | |
739 | static ssize_t bh1770_prox_enable_show(struct device *dev, |
740 | struct device_attribute *attr, char *buf) |
741 | { |
742 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
743 | ssize_t len; |
744 | |
745 | mutex_lock(&chip->mutex); |
746 | len = sprintf(buf, fmt: "%d\n" , chip->prox_enable_count); |
747 | mutex_unlock(lock: &chip->mutex); |
748 | return len; |
749 | } |
750 | |
751 | static ssize_t bh1770_prox_result_show(struct device *dev, |
752 | struct device_attribute *attr, char *buf) |
753 | { |
754 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
755 | ssize_t ret; |
756 | |
757 | mutex_lock(&chip->mutex); |
758 | if (chip->prox_enable_count && !pm_runtime_suspended(dev)) |
759 | ret = sprintf(buf, fmt: "%d\n" , chip->prox_data); |
760 | else |
761 | ret = -EIO; |
762 | mutex_unlock(lock: &chip->mutex); |
763 | return ret; |
764 | } |
765 | |
766 | static ssize_t bh1770_prox_range_show(struct device *dev, |
767 | struct device_attribute *attr, char *buf) |
768 | { |
769 | return sprintf(buf, fmt: "%d\n" , BH1770_PROX_RANGE); |
770 | } |
771 | |
772 | static ssize_t bh1770_get_prox_rate_avail(struct device *dev, |
773 | struct device_attribute *attr, char *buf) |
774 | { |
775 | int i; |
776 | int pos = 0; |
777 | for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++) |
778 | pos += sprintf(buf: buf + pos, fmt: "%d " , prox_rates_hz[i]); |
779 | sprintf(buf: buf + pos - 1, fmt: "\n" ); |
780 | return pos; |
781 | } |
782 | |
783 | static ssize_t bh1770_get_prox_rate_above(struct device *dev, |
784 | struct device_attribute *attr, char *buf) |
785 | { |
786 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
787 | return sprintf(buf, fmt: "%d\n" , prox_rates_hz[chip->prox_rate_threshold]); |
788 | } |
789 | |
790 | static ssize_t bh1770_get_prox_rate_below(struct device *dev, |
791 | struct device_attribute *attr, char *buf) |
792 | { |
793 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
794 | return sprintf(buf, fmt: "%d\n" , prox_rates_hz[chip->prox_rate]); |
795 | } |
796 | |
797 | static int bh1770_prox_rate_validate(int rate) |
798 | { |
799 | int i; |
800 | |
801 | for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++) |
802 | if (rate >= prox_rates_hz[i]) |
803 | break; |
804 | return i; |
805 | } |
806 | |
807 | static ssize_t bh1770_set_prox_rate_above(struct device *dev, |
808 | struct device_attribute *attr, |
809 | const char *buf, size_t count) |
810 | { |
811 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
812 | unsigned long value; |
813 | int ret; |
814 | |
815 | ret = kstrtoul(s: buf, base: 0, res: &value); |
816 | if (ret) |
817 | return ret; |
818 | |
819 | mutex_lock(&chip->mutex); |
820 | chip->prox_rate_threshold = bh1770_prox_rate_validate(rate: value); |
821 | mutex_unlock(lock: &chip->mutex); |
822 | return count; |
823 | } |
824 | |
825 | static ssize_t bh1770_set_prox_rate_below(struct device *dev, |
826 | struct device_attribute *attr, |
827 | const char *buf, size_t count) |
828 | { |
829 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
830 | unsigned long value; |
831 | int ret; |
832 | |
833 | ret = kstrtoul(s: buf, base: 0, res: &value); |
834 | if (ret) |
835 | return ret; |
836 | |
837 | mutex_lock(&chip->mutex); |
838 | chip->prox_rate = bh1770_prox_rate_validate(rate: value); |
839 | mutex_unlock(lock: &chip->mutex); |
840 | return count; |
841 | } |
842 | |
843 | static ssize_t bh1770_get_prox_thres(struct device *dev, |
844 | struct device_attribute *attr, char *buf) |
845 | { |
846 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
847 | return sprintf(buf, fmt: "%d\n" , chip->prox_threshold); |
848 | } |
849 | |
850 | static ssize_t bh1770_set_prox_thres(struct device *dev, |
851 | struct device_attribute *attr, |
852 | const char *buf, size_t count) |
853 | { |
854 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
855 | unsigned long value; |
856 | int ret; |
857 | |
858 | ret = kstrtoul(s: buf, base: 0, res: &value); |
859 | if (ret) |
860 | return ret; |
861 | |
862 | if (value > BH1770_PROX_RANGE) |
863 | return -EINVAL; |
864 | |
865 | mutex_lock(&chip->mutex); |
866 | chip->prox_threshold = value; |
867 | ret = bh1770_prox_set_threshold(chip); |
868 | mutex_unlock(lock: &chip->mutex); |
869 | if (ret < 0) |
870 | return ret; |
871 | return count; |
872 | } |
873 | |
874 | static ssize_t bh1770_prox_persistence_show(struct device *dev, |
875 | struct device_attribute *attr, char *buf) |
876 | { |
877 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
878 | |
879 | return sprintf(buf, fmt: "%u\n" , chip->prox_persistence); |
880 | } |
881 | |
882 | static ssize_t bh1770_prox_persistence_store(struct device *dev, |
883 | struct device_attribute *attr, |
884 | const char *buf, size_t len) |
885 | { |
886 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
887 | unsigned long value; |
888 | int ret; |
889 | |
890 | ret = kstrtoul(s: buf, base: 0, res: &value); |
891 | if (ret) |
892 | return ret; |
893 | |
894 | if (value > BH1770_PROX_MAX_PERSISTENCE) |
895 | return -EINVAL; |
896 | |
897 | chip->prox_persistence = value; |
898 | |
899 | return len; |
900 | } |
901 | |
902 | static ssize_t bh1770_prox_abs_thres_show(struct device *dev, |
903 | struct device_attribute *attr, char *buf) |
904 | { |
905 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
906 | return sprintf(buf, fmt: "%u\n" , chip->prox_abs_thres); |
907 | } |
908 | |
909 | static ssize_t bh1770_prox_abs_thres_store(struct device *dev, |
910 | struct device_attribute *attr, |
911 | const char *buf, size_t len) |
912 | { |
913 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
914 | unsigned long value; |
915 | int ret; |
916 | |
917 | ret = kstrtoul(s: buf, base: 0, res: &value); |
918 | if (ret) |
919 | return ret; |
920 | |
921 | if (value > BH1770_PROX_RANGE) |
922 | return -EINVAL; |
923 | |
924 | chip->prox_abs_thres = value; |
925 | |
926 | return len; |
927 | } |
928 | |
929 | static ssize_t bh1770_chip_id_show(struct device *dev, |
930 | struct device_attribute *attr, char *buf) |
931 | { |
932 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
933 | return sprintf(buf, fmt: "%s rev %d\n" , chip->chipname, chip->revision); |
934 | } |
935 | |
936 | static ssize_t bh1770_lux_calib_default_show(struct device *dev, |
937 | struct device_attribute *attr, char *buf) |
938 | { |
939 | return sprintf(buf, fmt: "%u\n" , BH1770_CALIB_SCALER); |
940 | } |
941 | |
942 | static ssize_t bh1770_lux_calib_show(struct device *dev, |
943 | struct device_attribute *attr, char *buf) |
944 | { |
945 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
946 | ssize_t len; |
947 | |
948 | mutex_lock(&chip->mutex); |
949 | len = sprintf(buf, fmt: "%u\n" , chip->lux_calib); |
950 | mutex_unlock(lock: &chip->mutex); |
951 | return len; |
952 | } |
953 | |
954 | static ssize_t bh1770_lux_calib_store(struct device *dev, |
955 | struct device_attribute *attr, |
956 | const char *buf, size_t len) |
957 | { |
958 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
959 | unsigned long value; |
960 | u32 old_calib; |
961 | u32 new_corr; |
962 | int ret; |
963 | |
964 | ret = kstrtoul(s: buf, base: 0, res: &value); |
965 | if (ret) |
966 | return ret; |
967 | |
968 | mutex_lock(&chip->mutex); |
969 | old_calib = chip->lux_calib; |
970 | chip->lux_calib = value; |
971 | new_corr = bh1770_get_corr_value(chip); |
972 | if (new_corr == 0) { |
973 | chip->lux_calib = old_calib; |
974 | mutex_unlock(lock: &chip->mutex); |
975 | return -EINVAL; |
976 | } |
977 | chip->lux_corr = new_corr; |
978 | /* Refresh thresholds on HW after changing correction value */ |
979 | bh1770_lux_update_thresholds(chip, threshold_hi: chip->lux_threshold_hi, |
980 | threshold_lo: chip->lux_threshold_lo); |
981 | |
982 | mutex_unlock(lock: &chip->mutex); |
983 | |
984 | return len; |
985 | } |
986 | |
987 | static ssize_t bh1770_get_lux_rate_avail(struct device *dev, |
988 | struct device_attribute *attr, char *buf) |
989 | { |
990 | int i; |
991 | int pos = 0; |
992 | for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++) |
993 | pos += sprintf(buf: buf + pos, fmt: "%d " , lux_rates_hz[i]); |
994 | sprintf(buf: buf + pos - 1, fmt: "\n" ); |
995 | return pos; |
996 | } |
997 | |
998 | static ssize_t bh1770_get_lux_rate(struct device *dev, |
999 | struct device_attribute *attr, char *buf) |
1000 | { |
1001 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
1002 | return sprintf(buf, fmt: "%d\n" , lux_rates_hz[chip->lux_rate_index]); |
1003 | } |
1004 | |
1005 | static ssize_t bh1770_set_lux_rate(struct device *dev, |
1006 | struct device_attribute *attr, |
1007 | const char *buf, size_t count) |
1008 | { |
1009 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
1010 | unsigned long rate_hz; |
1011 | int ret, i; |
1012 | |
1013 | ret = kstrtoul(s: buf, base: 0, res: &rate_hz); |
1014 | if (ret) |
1015 | return ret; |
1016 | |
1017 | for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++) |
1018 | if (rate_hz >= lux_rates_hz[i]) |
1019 | break; |
1020 | |
1021 | mutex_lock(&chip->mutex); |
1022 | chip->lux_rate_index = i; |
1023 | ret = bh1770_lux_rate(chip, rate_index: i); |
1024 | mutex_unlock(lock: &chip->mutex); |
1025 | |
1026 | if (ret < 0) |
1027 | return ret; |
1028 | |
1029 | return count; |
1030 | } |
1031 | |
1032 | static ssize_t bh1770_get_lux_thresh_above(struct device *dev, |
1033 | struct device_attribute *attr, char *buf) |
1034 | { |
1035 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
1036 | return sprintf(buf, fmt: "%d\n" , chip->lux_threshold_hi); |
1037 | } |
1038 | |
1039 | static ssize_t bh1770_get_lux_thresh_below(struct device *dev, |
1040 | struct device_attribute *attr, char *buf) |
1041 | { |
1042 | struct bh1770_chip *chip = dev_get_drvdata(dev); |
1043 | return sprintf(buf, fmt: "%d\n" , chip->lux_threshold_lo); |
1044 | } |
1045 | |
1046 | static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target, |
1047 | const char *buf) |
1048 | { |
1049 | unsigned long thresh; |
1050 | int ret; |
1051 | |
1052 | ret = kstrtoul(s: buf, base: 0, res: &thresh); |
1053 | if (ret) |
1054 | return ret; |
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 | threshold_hi: chip->lux_threshold_hi, |
1068 | threshold_lo: chip->lux_threshold_lo); |
1069 | mutex_unlock(lock: &chip->mutex); |
1070 | return ret; |
1071 | |
1072 | } |
1073 | |
1074 | static 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, target: &chip->lux_threshold_hi, buf); |
1080 | if (ret < 0) |
1081 | return ret; |
1082 | return len; |
1083 | } |
1084 | |
1085 | static 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, target: &chip->lux_threshold_lo, buf); |
1091 | if (ret < 0) |
1092 | return ret; |
1093 | return len; |
1094 | } |
1095 | |
1096 | static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show, |
1097 | bh1770_prox_enable_store); |
1098 | static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR, |
1099 | bh1770_prox_abs_thres_show, |
1100 | bh1770_prox_abs_thres_store); |
1101 | static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR, |
1102 | bh1770_get_prox_thres, |
1103 | bh1770_set_prox_thres); |
1104 | static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL); |
1105 | static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL); |
1106 | static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR, |
1107 | bh1770_prox_persistence_show, |
1108 | bh1770_prox_persistence_store); |
1109 | static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR, |
1110 | bh1770_get_prox_rate_above, |
1111 | bh1770_set_prox_rate_above); |
1112 | static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR, |
1113 | bh1770_get_prox_rate_below, |
1114 | bh1770_set_prox_rate_below); |
1115 | static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL); |
1116 | |
1117 | static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show, |
1118 | bh1770_lux_calib_store); |
1119 | static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, |
1120 | bh1770_lux_calib_default_show, |
1121 | NULL); |
1122 | static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL); |
1123 | static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL); |
1124 | static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate, |
1125 | bh1770_set_lux_rate); |
1126 | static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL); |
1127 | static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, |
1128 | bh1770_get_lux_thresh_above, |
1129 | bh1770_set_lux_thresh_above); |
1130 | static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, |
1131 | bh1770_get_lux_thresh_below, |
1132 | bh1770_set_lux_thresh_below); |
1133 | static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL); |
1134 | static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show, |
1135 | bh1770_power_state_store); |
1136 | |
1137 | |
1138 | static 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 | |
1161 | static const struct attribute_group bh1770_attribute_group = { |
1162 | .attrs = sysfs_attrs |
1163 | }; |
1164 | |
1165 | static int bh1770_probe(struct i2c_client *client) |
1166 | { |
1167 | struct bh1770_chip *chip; |
1168 | int err; |
1169 | |
1170 | chip = devm_kzalloc(dev: &client->dev, size: sizeof *chip, GFP_KERNEL); |
1171 | if (!chip) |
1172 | return -ENOMEM; |
1173 | |
1174 | i2c_set_clientdata(client, data: chip); |
1175 | chip->client = client; |
1176 | |
1177 | mutex_init(&chip->mutex); |
1178 | init_waitqueue_head(&chip->wait); |
1179 | INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work); |
1180 | |
1181 | if (client->dev.platform_data == NULL) { |
1182 | dev_err(&client->dev, "platform data is mandatory\n" ); |
1183 | return -EINVAL; |
1184 | } |
1185 | |
1186 | chip->pdata = client->dev.platform_data; |
1187 | chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE; |
1188 | chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE; |
1189 | chip->lux_threshold_lo = BH1770_LUX_DEF_THRES; |
1190 | chip->lux_threshold_hi = BH1770_LUX_DEF_THRES; |
1191 | |
1192 | if (chip->pdata->glass_attenuation == 0) |
1193 | chip->lux_ga = BH1770_NEUTRAL_GA; |
1194 | else |
1195 | chip->lux_ga = chip->pdata->glass_attenuation; |
1196 | |
1197 | chip->prox_threshold = BH1770_PROX_DEF_THRES; |
1198 | chip->prox_led = chip->pdata->led_def_curr; |
1199 | chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES; |
1200 | chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE; |
1201 | chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH; |
1202 | chip->prox_rate = BH1770_PROX_DEFAULT_RATE; |
1203 | chip->prox_data = 0; |
1204 | |
1205 | chip->regs[0].supply = reg_vcc; |
1206 | chip->regs[1].supply = reg_vleds; |
1207 | |
1208 | err = devm_regulator_bulk_get(dev: &client->dev, |
1209 | ARRAY_SIZE(chip->regs), consumers: chip->regs); |
1210 | if (err < 0) { |
1211 | dev_err(&client->dev, "Cannot get regulators\n" ); |
1212 | return err; |
1213 | } |
1214 | |
1215 | err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), |
1216 | consumers: chip->regs); |
1217 | if (err < 0) { |
1218 | dev_err(&client->dev, "Cannot enable regulators\n" ); |
1219 | return err; |
1220 | } |
1221 | |
1222 | usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); |
1223 | err = bh1770_detect(chip); |
1224 | if (err < 0) |
1225 | goto fail0; |
1226 | |
1227 | /* Start chip */ |
1228 | bh1770_chip_on(chip); |
1229 | pm_runtime_set_active(dev: &client->dev); |
1230 | pm_runtime_enable(dev: &client->dev); |
1231 | |
1232 | chip->lux_corr = bh1770_get_corr_value(chip); |
1233 | if (chip->lux_corr == 0) { |
1234 | dev_err(&client->dev, "Improper correction values\n" ); |
1235 | err = -EINVAL; |
1236 | goto fail0; |
1237 | } |
1238 | |
1239 | if (chip->pdata->setup_resources) { |
1240 | err = chip->pdata->setup_resources(); |
1241 | if (err) { |
1242 | err = -EINVAL; |
1243 | goto fail0; |
1244 | } |
1245 | } |
1246 | |
1247 | err = sysfs_create_group(kobj: &chip->client->dev.kobj, |
1248 | grp: &bh1770_attribute_group); |
1249 | if (err < 0) { |
1250 | dev_err(&chip->client->dev, "Sysfs registration failed\n" ); |
1251 | goto fail1; |
1252 | } |
1253 | |
1254 | /* |
1255 | * Chip needs level triggered interrupt to work. However, |
1256 | * level triggering doesn't work always correctly with power |
1257 | * management. Select both |
1258 | */ |
1259 | err = request_threaded_irq(irq: client->irq, NULL, |
1260 | thread_fn: bh1770_irq, |
1261 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT | |
1262 | IRQF_TRIGGER_LOW, |
1263 | name: "bh1770" , dev: chip); |
1264 | if (err) { |
1265 | dev_err(&client->dev, "could not get IRQ %d\n" , |
1266 | client->irq); |
1267 | goto fail2; |
1268 | } |
1269 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), consumers: chip->regs); |
1270 | return err; |
1271 | fail2: |
1272 | sysfs_remove_group(kobj: &chip->client->dev.kobj, |
1273 | grp: &bh1770_attribute_group); |
1274 | fail1: |
1275 | if (chip->pdata->release_resources) |
1276 | chip->pdata->release_resources(); |
1277 | fail0: |
1278 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), consumers: chip->regs); |
1279 | return err; |
1280 | } |
1281 | |
1282 | static void bh1770_remove(struct i2c_client *client) |
1283 | { |
1284 | struct bh1770_chip *chip = i2c_get_clientdata(client); |
1285 | |
1286 | free_irq(client->irq, chip); |
1287 | |
1288 | sysfs_remove_group(kobj: &chip->client->dev.kobj, |
1289 | grp: &bh1770_attribute_group); |
1290 | |
1291 | if (chip->pdata->release_resources) |
1292 | chip->pdata->release_resources(); |
1293 | |
1294 | cancel_delayed_work_sync(dwork: &chip->prox_work); |
1295 | |
1296 | if (!pm_runtime_suspended(dev: &client->dev)) |
1297 | bh1770_chip_off(chip); |
1298 | |
1299 | pm_runtime_disable(dev: &client->dev); |
1300 | pm_runtime_set_suspended(dev: &client->dev); |
1301 | } |
1302 | |
1303 | #ifdef CONFIG_PM_SLEEP |
1304 | static int bh1770_suspend(struct device *dev) |
1305 | { |
1306 | struct i2c_client *client = to_i2c_client(dev); |
1307 | struct bh1770_chip *chip = i2c_get_clientdata(client); |
1308 | |
1309 | bh1770_chip_off(chip); |
1310 | |
1311 | return 0; |
1312 | } |
1313 | |
1314 | static int bh1770_resume(struct device *dev) |
1315 | { |
1316 | struct i2c_client *client = to_i2c_client(dev); |
1317 | struct bh1770_chip *chip = i2c_get_clientdata(client); |
1318 | int ret = 0; |
1319 | |
1320 | bh1770_chip_on(chip); |
1321 | |
1322 | if (!pm_runtime_suspended(dev)) { |
1323 | /* |
1324 | * If we were enabled at suspend time, it is expected |
1325 | * everything works nice and smoothly |
1326 | */ |
1327 | ret = bh1770_lux_rate(chip, rate_index: chip->lux_rate_index); |
1328 | ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE); |
1329 | |
1330 | /* This causes interrupt after the next measurement cycle */ |
1331 | bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, |
1332 | BH1770_LUX_DEF_THRES); |
1333 | /* Inform that we are waiting for a result from ALS */ |
1334 | chip->lux_wait_result = true; |
1335 | bh1770_prox_mode_control(chip); |
1336 | } |
1337 | return ret; |
1338 | } |
1339 | #endif |
1340 | |
1341 | #ifdef CONFIG_PM |
1342 | static int bh1770_runtime_suspend(struct device *dev) |
1343 | { |
1344 | struct i2c_client *client = to_i2c_client(dev); |
1345 | struct bh1770_chip *chip = i2c_get_clientdata(client); |
1346 | |
1347 | bh1770_chip_off(chip); |
1348 | |
1349 | return 0; |
1350 | } |
1351 | |
1352 | static int bh1770_runtime_resume(struct device *dev) |
1353 | { |
1354 | struct i2c_client *client = to_i2c_client(dev); |
1355 | struct bh1770_chip *chip = i2c_get_clientdata(client); |
1356 | |
1357 | bh1770_chip_on(chip); |
1358 | |
1359 | return 0; |
1360 | } |
1361 | #endif |
1362 | |
1363 | static const struct i2c_device_id bh1770_id[] = { |
1364 | {"bh1770glc" , 0 }, |
1365 | {"sfh7770" , 0 }, |
1366 | {} |
1367 | }; |
1368 | |
1369 | MODULE_DEVICE_TABLE(i2c, bh1770_id); |
1370 | |
1371 | static const struct dev_pm_ops bh1770_pm_ops = { |
1372 | SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume) |
1373 | SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL) |
1374 | }; |
1375 | |
1376 | static struct i2c_driver bh1770_driver = { |
1377 | .driver = { |
1378 | .name = "bh1770glc" , |
1379 | .pm = &bh1770_pm_ops, |
1380 | }, |
1381 | .probe = bh1770_probe, |
1382 | .remove = bh1770_remove, |
1383 | .id_table = bh1770_id, |
1384 | }; |
1385 | |
1386 | module_i2c_driver(bh1770_driver); |
1387 | |
1388 | MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor" ); |
1389 | MODULE_AUTHOR("Samu Onkalo, Nokia Corporation" ); |
1390 | MODULE_LICENSE("GPL v2" ); |
1391 | |