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190420ab SO |
1 | /* |
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 | ||
134 | struct 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 | ||
173 | static const char reg_vcc[] = "Vcc"; | |
174 | static 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 | */ | |
180 | static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2}; | |
181 | static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500}; | |
182 | ||
183 | /* Supported IR-led currents in mA */ | |
184 | static 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 | */ | |
190 | static 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 | */ | |
196 | static 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 | ||
206 | static 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 */ | |
216 | static 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 | ||
231 | static 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 */ | |
244 | static 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 | */ | |
260 | static 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 | ||
270 | static 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 | */ | |
288 | static 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 | ||
303 | static 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 | ||
310 | static 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 */ | |
317 | static 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 | ||
357 | static 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 */ | |
377 | static 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 | ||
389 | static 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 | */ | |
399 | static 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 | ||
430 | static 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 */ | |
442 | static 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 */ | |
465 | static 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 | } | |
518 | out: | |
519 | return ret; | |
520 | } | |
521 | ||
522 | static 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; | |
559 | error: | |
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 | ||
574 | static 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 */ | |
585 | static 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 | ||
646 | static 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; | |
aec04288 | 652 | ssize_t ret; |
190420ab | 653 | |
f7b41276 JH |
654 | ret = kstrtoul(buf, 0, &value); |
655 | if (ret) | |
656 | return ret; | |
190420ab SO |
657 | |
658 | mutex_lock(&chip->mutex); | |
659 | if (value) { | |
660 | pm_runtime_get_sync(dev); | |
661 | ||
662 | ret = bh1770_lux_rate(chip, chip->lux_rate_index); | |
aec04288 DC |
663 | if (ret < 0) { |
664 | pm_runtime_put(dev); | |
665 | goto leave; | |
666 | } | |
190420ab | 667 | |
aec04288 | 668 | ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE); |
190420ab SO |
669 | if (ret < 0) { |
670 | pm_runtime_put(dev); | |
671 | goto leave; | |
672 | } | |
673 | ||
674 | /* This causes interrupt after the next measurement cycle */ | |
675 | bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, | |
676 | BH1770_LUX_DEF_THRES); | |
677 | /* Inform that we are waiting for a result from ALS */ | |
678 | chip->lux_wait_result = true; | |
679 | bh1770_prox_mode_control(chip); | |
680 | } else if (!pm_runtime_suspended(dev)) { | |
681 | pm_runtime_put(dev); | |
682 | } | |
683 | ret = count; | |
684 | leave: | |
685 | mutex_unlock(&chip->mutex); | |
686 | return ret; | |
687 | } | |
688 | ||
689 | static ssize_t bh1770_power_state_show(struct device *dev, | |
690 | struct device_attribute *attr, char *buf) | |
691 | { | |
692 | return sprintf(buf, "%d\n", !pm_runtime_suspended(dev)); | |
693 | } | |
694 | ||
695 | static ssize_t bh1770_lux_result_show(struct device *dev, | |
696 | struct device_attribute *attr, char *buf) | |
697 | { | |
698 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
699 | ssize_t ret; | |
700 | long timeout; | |
701 | ||
702 | if (pm_runtime_suspended(dev)) | |
703 | return -EIO; /* Chip is not enabled at all */ | |
704 | ||
705 | timeout = wait_event_interruptible_timeout(chip->wait, | |
706 | !chip->lux_wait_result, | |
707 | msecs_to_jiffies(BH1770_TIMEOUT)); | |
708 | if (!timeout) | |
709 | return -EIO; | |
710 | ||
711 | mutex_lock(&chip->mutex); | |
712 | ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip)); | |
713 | mutex_unlock(&chip->mutex); | |
714 | ||
715 | return ret; | |
716 | } | |
717 | ||
718 | static ssize_t bh1770_lux_range_show(struct device *dev, | |
719 | struct device_attribute *attr, char *buf) | |
720 | { | |
721 | return sprintf(buf, "%d\n", BH1770_LUX_RANGE); | |
722 | } | |
723 | ||
724 | static ssize_t bh1770_prox_enable_store(struct device *dev, | |
725 | struct device_attribute *attr, | |
726 | const char *buf, size_t count) | |
727 | { | |
728 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
729 | unsigned long value; | |
f7b41276 | 730 | int ret; |
190420ab | 731 | |
f7b41276 JH |
732 | ret = kstrtoul(buf, 0, &value); |
733 | if (ret) | |
734 | return ret; | |
190420ab SO |
735 | |
736 | mutex_lock(&chip->mutex); | |
737 | /* Assume no proximity. Sensor will tell real state soon */ | |
738 | if (!chip->prox_enable_count) | |
739 | chip->prox_data = 0; | |
740 | ||
741 | if (value) | |
742 | chip->prox_enable_count++; | |
743 | else if (chip->prox_enable_count > 0) | |
744 | chip->prox_enable_count--; | |
745 | else | |
746 | goto leave; | |
747 | ||
748 | /* Run control only when chip is powered on */ | |
749 | if (!pm_runtime_suspended(dev)) | |
750 | bh1770_prox_mode_control(chip); | |
751 | leave: | |
752 | mutex_unlock(&chip->mutex); | |
753 | return count; | |
754 | } | |
755 | ||
756 | static ssize_t bh1770_prox_enable_show(struct device *dev, | |
757 | struct device_attribute *attr, char *buf) | |
758 | { | |
759 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
760 | ssize_t len; | |
761 | ||
762 | mutex_lock(&chip->mutex); | |
763 | len = sprintf(buf, "%d\n", chip->prox_enable_count); | |
764 | mutex_unlock(&chip->mutex); | |
765 | return len; | |
766 | } | |
767 | ||
768 | static ssize_t bh1770_prox_result_show(struct device *dev, | |
769 | struct device_attribute *attr, char *buf) | |
770 | { | |
771 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
772 | ssize_t ret; | |
773 | ||
774 | mutex_lock(&chip->mutex); | |
775 | if (chip->prox_enable_count && !pm_runtime_suspended(dev)) | |
776 | ret = sprintf(buf, "%d\n", chip->prox_data); | |
777 | else | |
778 | ret = -EIO; | |
779 | mutex_unlock(&chip->mutex); | |
780 | return ret; | |
781 | } | |
782 | ||
783 | static ssize_t bh1770_prox_range_show(struct device *dev, | |
784 | struct device_attribute *attr, char *buf) | |
785 | { | |
786 | return sprintf(buf, "%d\n", BH1770_PROX_RANGE); | |
787 | } | |
788 | ||
789 | static ssize_t bh1770_get_prox_rate_avail(struct device *dev, | |
790 | struct device_attribute *attr, char *buf) | |
791 | { | |
792 | int i; | |
793 | int pos = 0; | |
794 | for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++) | |
795 | pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]); | |
796 | sprintf(buf + pos - 1, "\n"); | |
797 | return pos; | |
798 | } | |
799 | ||
800 | static ssize_t bh1770_get_prox_rate_above(struct device *dev, | |
801 | struct device_attribute *attr, char *buf) | |
802 | { | |
803 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
804 | return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]); | |
805 | } | |
806 | ||
807 | static ssize_t bh1770_get_prox_rate_below(struct device *dev, | |
808 | struct device_attribute *attr, char *buf) | |
809 | { | |
810 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
811 | return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]); | |
812 | } | |
813 | ||
814 | static int bh1770_prox_rate_validate(int rate) | |
815 | { | |
816 | int i; | |
817 | ||
818 | for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++) | |
819 | if (rate >= prox_rates_hz[i]) | |
820 | break; | |
821 | return i; | |
822 | } | |
823 | ||
824 | static ssize_t bh1770_set_prox_rate_above(struct device *dev, | |
825 | struct device_attribute *attr, | |
826 | const char *buf, size_t count) | |
827 | { | |
828 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
829 | unsigned long value; | |
f7b41276 | 830 | int ret; |
190420ab | 831 | |
f7b41276 JH |
832 | ret = kstrtoul(buf, 0, &value); |
833 | if (ret) | |
834 | return ret; | |
190420ab SO |
835 | |
836 | mutex_lock(&chip->mutex); | |
837 | chip->prox_rate_threshold = bh1770_prox_rate_validate(value); | |
838 | mutex_unlock(&chip->mutex); | |
839 | return count; | |
840 | } | |
841 | ||
842 | static ssize_t bh1770_set_prox_rate_below(struct device *dev, | |
843 | struct device_attribute *attr, | |
844 | const char *buf, size_t count) | |
845 | { | |
846 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
847 | unsigned long value; | |
f7b41276 | 848 | int ret; |
190420ab | 849 | |
f7b41276 JH |
850 | ret = kstrtoul(buf, 0, &value); |
851 | if (ret) | |
852 | return ret; | |
190420ab SO |
853 | |
854 | mutex_lock(&chip->mutex); | |
855 | chip->prox_rate = bh1770_prox_rate_validate(value); | |
856 | mutex_unlock(&chip->mutex); | |
857 | return count; | |
858 | } | |
859 | ||
860 | static ssize_t bh1770_get_prox_thres(struct device *dev, | |
861 | struct device_attribute *attr, char *buf) | |
862 | { | |
863 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
864 | return sprintf(buf, "%d\n", chip->prox_threshold); | |
865 | } | |
866 | ||
867 | static ssize_t bh1770_set_prox_thres(struct device *dev, | |
868 | struct device_attribute *attr, | |
869 | const char *buf, size_t count) | |
870 | { | |
871 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
872 | unsigned long value; | |
873 | int ret; | |
874 | ||
f7b41276 JH |
875 | ret = kstrtoul(buf, 0, &value); |
876 | if (ret) | |
877 | return ret; | |
878 | ||
190420ab SO |
879 | if (value > BH1770_PROX_RANGE) |
880 | return -EINVAL; | |
881 | ||
882 | mutex_lock(&chip->mutex); | |
883 | chip->prox_threshold = value; | |
884 | ret = bh1770_prox_set_threshold(chip); | |
885 | mutex_unlock(&chip->mutex); | |
886 | if (ret < 0) | |
887 | return ret; | |
888 | return count; | |
889 | } | |
890 | ||
891 | static ssize_t bh1770_prox_persistence_show(struct device *dev, | |
892 | struct device_attribute *attr, char *buf) | |
893 | { | |
894 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
895 | ||
896 | return sprintf(buf, "%u\n", chip->prox_persistence); | |
897 | } | |
898 | ||
899 | static ssize_t bh1770_prox_persistence_store(struct device *dev, | |
900 | struct device_attribute *attr, | |
901 | const char *buf, size_t len) | |
902 | { | |
903 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
904 | unsigned long value; | |
f7b41276 | 905 | int ret; |
190420ab | 906 | |
f7b41276 JH |
907 | ret = kstrtoul(buf, 0, &value); |
908 | if (ret) | |
909 | return ret; | |
190420ab SO |
910 | |
911 | if (value > BH1770_PROX_MAX_PERSISTENCE) | |
912 | return -EINVAL; | |
913 | ||
914 | chip->prox_persistence = value; | |
915 | ||
916 | return len; | |
917 | } | |
918 | ||
919 | static ssize_t bh1770_prox_abs_thres_show(struct device *dev, | |
920 | struct device_attribute *attr, char *buf) | |
921 | { | |
922 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
923 | return sprintf(buf, "%u\n", chip->prox_abs_thres); | |
924 | } | |
925 | ||
926 | static ssize_t bh1770_prox_abs_thres_store(struct device *dev, | |
927 | struct device_attribute *attr, | |
928 | const char *buf, size_t len) | |
929 | { | |
930 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
931 | unsigned long value; | |
f7b41276 | 932 | int ret; |
190420ab | 933 | |
f7b41276 JH |
934 | ret = kstrtoul(buf, 0, &value); |
935 | if (ret) | |
936 | return ret; | |
190420ab SO |
937 | |
938 | if (value > BH1770_PROX_RANGE) | |
939 | return -EINVAL; | |
940 | ||
941 | chip->prox_abs_thres = value; | |
942 | ||
943 | return len; | |
944 | } | |
945 | ||
946 | static ssize_t bh1770_chip_id_show(struct device *dev, | |
947 | struct device_attribute *attr, char *buf) | |
948 | { | |
949 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
950 | return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision); | |
951 | } | |
952 | ||
953 | static ssize_t bh1770_lux_calib_default_show(struct device *dev, | |
954 | struct device_attribute *attr, char *buf) | |
955 | { | |
956 | return sprintf(buf, "%u\n", BH1770_CALIB_SCALER); | |
957 | } | |
958 | ||
959 | static ssize_t bh1770_lux_calib_show(struct device *dev, | |
960 | struct device_attribute *attr, char *buf) | |
961 | { | |
962 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
963 | ssize_t len; | |
964 | ||
965 | mutex_lock(&chip->mutex); | |
966 | len = sprintf(buf, "%u\n", chip->lux_calib); | |
967 | mutex_unlock(&chip->mutex); | |
968 | return len; | |
969 | } | |
970 | ||
971 | static ssize_t bh1770_lux_calib_store(struct device *dev, | |
972 | struct device_attribute *attr, | |
973 | const char *buf, size_t len) | |
974 | { | |
975 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
976 | unsigned long value; | |
977 | u32 old_calib; | |
978 | u32 new_corr; | |
f7b41276 | 979 | int ret; |
190420ab | 980 | |
f7b41276 JH |
981 | ret = kstrtoul(buf, 0, &value); |
982 | if (ret) | |
983 | return ret; | |
190420ab SO |
984 | |
985 | mutex_lock(&chip->mutex); | |
986 | old_calib = chip->lux_calib; | |
987 | chip->lux_calib = value; | |
988 | new_corr = bh1770_get_corr_value(chip); | |
989 | if (new_corr == 0) { | |
990 | chip->lux_calib = old_calib; | |
991 | mutex_unlock(&chip->mutex); | |
992 | return -EINVAL; | |
993 | } | |
994 | chip->lux_corr = new_corr; | |
995 | /* Refresh thresholds on HW after changing correction value */ | |
996 | bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi, | |
997 | chip->lux_threshold_lo); | |
998 | ||
999 | mutex_unlock(&chip->mutex); | |
1000 | ||
1001 | return len; | |
1002 | } | |
1003 | ||
1004 | static ssize_t bh1770_get_lux_rate_avail(struct device *dev, | |
1005 | struct device_attribute *attr, char *buf) | |
1006 | { | |
1007 | int i; | |
1008 | int pos = 0; | |
1009 | for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++) | |
1010 | pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]); | |
1011 | sprintf(buf + pos - 1, "\n"); | |
1012 | return pos; | |
1013 | } | |
1014 | ||
1015 | static ssize_t bh1770_get_lux_rate(struct device *dev, | |
1016 | struct device_attribute *attr, char *buf) | |
1017 | { | |
1018 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
1019 | return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]); | |
1020 | } | |
1021 | ||
1022 | static ssize_t bh1770_set_lux_rate(struct device *dev, | |
1023 | struct device_attribute *attr, | |
1024 | const char *buf, size_t count) | |
1025 | { | |
1026 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
1027 | unsigned long rate_hz; | |
1028 | int ret, i; | |
1029 | ||
f7b41276 JH |
1030 | ret = kstrtoul(buf, 0, &rate_hz); |
1031 | if (ret) | |
1032 | return ret; | |
190420ab SO |
1033 | |
1034 | for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++) | |
1035 | if (rate_hz >= lux_rates_hz[i]) | |
1036 | break; | |
1037 | ||
1038 | mutex_lock(&chip->mutex); | |
1039 | chip->lux_rate_index = i; | |
1040 | ret = bh1770_lux_rate(chip, i); | |
1041 | mutex_unlock(&chip->mutex); | |
1042 | ||
1043 | if (ret < 0) | |
1044 | return ret; | |
1045 | ||
1046 | return count; | |
1047 | } | |
1048 | ||
1049 | static ssize_t bh1770_get_lux_thresh_above(struct device *dev, | |
1050 | struct device_attribute *attr, char *buf) | |
1051 | { | |
1052 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
1053 | return sprintf(buf, "%d\n", chip->lux_threshold_hi); | |
1054 | } | |
1055 | ||
1056 | static ssize_t bh1770_get_lux_thresh_below(struct device *dev, | |
1057 | struct device_attribute *attr, char *buf) | |
1058 | { | |
1059 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
1060 | return sprintf(buf, "%d\n", chip->lux_threshold_lo); | |
1061 | } | |
1062 | ||
1063 | static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target, | |
1064 | const char *buf) | |
1065 | { | |
190420ab | 1066 | unsigned long thresh; |
f7b41276 | 1067 | int ret; |
190420ab | 1068 | |
f7b41276 JH |
1069 | ret = kstrtoul(buf, 0, &thresh); |
1070 | if (ret) | |
1071 | return ret; | |
190420ab SO |
1072 | |
1073 | if (thresh > BH1770_LUX_RANGE) | |
1074 | return -EINVAL; | |
1075 | ||
1076 | mutex_lock(&chip->mutex); | |
1077 | *target = thresh; | |
1078 | /* | |
1079 | * Don't update values in HW if we are still waiting for | |
1080 | * first interrupt to come after device handle open call. | |
1081 | */ | |
1082 | if (!chip->lux_wait_result) | |
1083 | ret = bh1770_lux_update_thresholds(chip, | |
1084 | chip->lux_threshold_hi, | |
1085 | chip->lux_threshold_lo); | |
1086 | mutex_unlock(&chip->mutex); | |
1087 | return ret; | |
1088 | ||
1089 | } | |
1090 | ||
1091 | static ssize_t bh1770_set_lux_thresh_above(struct device *dev, | |
1092 | struct device_attribute *attr, | |
1093 | const char *buf, size_t len) | |
1094 | { | |
1095 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
1096 | int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf); | |
1097 | if (ret < 0) | |
1098 | return ret; | |
1099 | return len; | |
1100 | } | |
1101 | ||
1102 | static ssize_t bh1770_set_lux_thresh_below(struct device *dev, | |
1103 | struct device_attribute *attr, | |
1104 | const char *buf, size_t len) | |
1105 | { | |
1106 | struct bh1770_chip *chip = dev_get_drvdata(dev); | |
1107 | int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf); | |
1108 | if (ret < 0) | |
1109 | return ret; | |
1110 | return len; | |
1111 | } | |
1112 | ||
1113 | static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show, | |
1114 | bh1770_prox_enable_store); | |
1115 | static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR, | |
1116 | bh1770_prox_abs_thres_show, | |
1117 | bh1770_prox_abs_thres_store); | |
1118 | static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR, | |
1119 | bh1770_get_prox_thres, | |
1120 | bh1770_set_prox_thres); | |
1121 | static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL); | |
1122 | static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL); | |
1123 | static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR, | |
1124 | bh1770_prox_persistence_show, | |
1125 | bh1770_prox_persistence_store); | |
1126 | static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR, | |
1127 | bh1770_get_prox_rate_above, | |
1128 | bh1770_set_prox_rate_above); | |
1129 | static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR, | |
1130 | bh1770_get_prox_rate_below, | |
1131 | bh1770_set_prox_rate_below); | |
1132 | static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL); | |
1133 | ||
1134 | static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show, | |
1135 | bh1770_lux_calib_store); | |
1136 | static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, | |
1137 | bh1770_lux_calib_default_show, | |
1138 | NULL); | |
1139 | static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL); | |
1140 | static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL); | |
1141 | static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate, | |
1142 | bh1770_set_lux_rate); | |
1143 | static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL); | |
1144 | static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, | |
1145 | bh1770_get_lux_thresh_above, | |
1146 | bh1770_set_lux_thresh_above); | |
1147 | static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, | |
1148 | bh1770_get_lux_thresh_below, | |
1149 | bh1770_set_lux_thresh_below); | |
1150 | static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL); | |
1151 | static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show, | |
1152 | bh1770_power_state_store); | |
1153 | ||
1154 | ||
1155 | static struct attribute *sysfs_attrs[] = { | |
1156 | &dev_attr_lux0_calibscale.attr, | |
1157 | &dev_attr_lux0_calibscale_default.attr, | |
1158 | &dev_attr_lux0_input.attr, | |
1159 | &dev_attr_lux0_sensor_range.attr, | |
1160 | &dev_attr_lux0_rate.attr, | |
1161 | &dev_attr_lux0_rate_avail.attr, | |
1162 | &dev_attr_lux0_thresh_above_value.attr, | |
1163 | &dev_attr_lux0_thresh_below_value.attr, | |
1164 | &dev_attr_prox0_raw.attr, | |
1165 | &dev_attr_prox0_sensor_range.attr, | |
1166 | &dev_attr_prox0_raw_en.attr, | |
1167 | &dev_attr_prox0_thresh_above_count.attr, | |
1168 | &dev_attr_prox0_rate_above.attr, | |
1169 | &dev_attr_prox0_rate_below.attr, | |
1170 | &dev_attr_prox0_rate_avail.attr, | |
1171 | &dev_attr_prox0_thresh_above0_value.attr, | |
1172 | &dev_attr_prox0_thresh_above1_value.attr, | |
1173 | &dev_attr_chip_id.attr, | |
1174 | &dev_attr_power_state.attr, | |
1175 | NULL | |
1176 | }; | |
1177 | ||
1178 | static struct attribute_group bh1770_attribute_group = { | |
1179 | .attrs = sysfs_attrs | |
1180 | }; | |
1181 | ||
80c8ae28 | 1182 | static int bh1770_probe(struct i2c_client *client, |
190420ab SO |
1183 | const struct i2c_device_id *id) |
1184 | { | |
1185 | struct bh1770_chip *chip; | |
1186 | int err; | |
1187 | ||
4734e390 | 1188 | chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL); |
190420ab SO |
1189 | if (!chip) |
1190 | return -ENOMEM; | |
1191 | ||
1192 | i2c_set_clientdata(client, chip); | |
1193 | chip->client = client; | |
1194 | ||
1195 | mutex_init(&chip->mutex); | |
1196 | init_waitqueue_head(&chip->wait); | |
1197 | INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work); | |
1198 | ||
1199 | if (client->dev.platform_data == NULL) { | |
1200 | dev_err(&client->dev, "platform data is mandatory\n"); | |
4734e390 | 1201 | return -EINVAL; |
190420ab SO |
1202 | } |
1203 | ||
1204 | chip->pdata = client->dev.platform_data; | |
1205 | chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE; | |
1206 | chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE; | |
1207 | chip->lux_threshold_lo = BH1770_LUX_DEF_THRES; | |
1208 | chip->lux_threshold_hi = BH1770_LUX_DEF_THRES; | |
1209 | ||
1210 | if (chip->pdata->glass_attenuation == 0) | |
1211 | chip->lux_ga = BH1770_NEUTRAL_GA; | |
1212 | else | |
1213 | chip->lux_ga = chip->pdata->glass_attenuation; | |
1214 | ||
1215 | chip->prox_threshold = BH1770_PROX_DEF_THRES; | |
1216 | chip->prox_led = chip->pdata->led_def_curr; | |
1217 | chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES; | |
1218 | chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE; | |
1219 | chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH; | |
1220 | chip->prox_rate = BH1770_PROX_DEFAULT_RATE; | |
1221 | chip->prox_data = 0; | |
1222 | ||
1223 | chip->regs[0].supply = reg_vcc; | |
1224 | chip->regs[1].supply = reg_vleds; | |
1225 | ||
4734e390 HS |
1226 | err = devm_regulator_bulk_get(&client->dev, |
1227 | ARRAY_SIZE(chip->regs), chip->regs); | |
190420ab SO |
1228 | if (err < 0) { |
1229 | dev_err(&client->dev, "Cannot get regulators\n"); | |
4734e390 | 1230 | return err; |
190420ab SO |
1231 | } |
1232 | ||
1233 | err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), | |
1234 | chip->regs); | |
1235 | if (err < 0) { | |
1236 | dev_err(&client->dev, "Cannot enable regulators\n"); | |
4734e390 | 1237 | return err; |
190420ab SO |
1238 | } |
1239 | ||
1240 | usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); | |
1241 | err = bh1770_detect(chip); | |
1242 | if (err < 0) | |
4734e390 | 1243 | goto fail0; |
190420ab SO |
1244 | |
1245 | /* Start chip */ | |
1246 | bh1770_chip_on(chip); | |
1247 | pm_runtime_set_active(&client->dev); | |
1248 | pm_runtime_enable(&client->dev); | |
1249 | ||
1250 | chip->lux_corr = bh1770_get_corr_value(chip); | |
1251 | if (chip->lux_corr == 0) { | |
1252 | dev_err(&client->dev, "Improper correction values\n"); | |
1253 | err = -EINVAL; | |
4734e390 | 1254 | goto fail0; |
190420ab SO |
1255 | } |
1256 | ||
1257 | if (chip->pdata->setup_resources) { | |
1258 | err = chip->pdata->setup_resources(); | |
1259 | if (err) { | |
1260 | err = -EINVAL; | |
4734e390 | 1261 | goto fail0; |
190420ab SO |
1262 | } |
1263 | } | |
1264 | ||
1265 | err = sysfs_create_group(&chip->client->dev.kobj, | |
1266 | &bh1770_attribute_group); | |
1267 | if (err < 0) { | |
1268 | dev_err(&chip->client->dev, "Sysfs registration failed\n"); | |
4734e390 | 1269 | goto fail1; |
190420ab SO |
1270 | } |
1271 | ||
1272 | /* | |
1273 | * Chip needs level triggered interrupt to work. However, | |
1274 | * level triggering doesn't work always correctly with power | |
1275 | * management. Select both | |
1276 | */ | |
1277 | err = request_threaded_irq(client->irq, NULL, | |
1278 | bh1770_irq, | |
1279 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT | | |
1280 | IRQF_TRIGGER_LOW, | |
1281 | "bh1770", chip); | |
1282 | if (err) { | |
1283 | dev_err(&client->dev, "could not get IRQ %d\n", | |
1284 | client->irq); | |
4734e390 | 1285 | goto fail2; |
190420ab SO |
1286 | } |
1287 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); | |
1288 | return err; | |
4734e390 | 1289 | fail2: |
190420ab SO |
1290 | sysfs_remove_group(&chip->client->dev.kobj, |
1291 | &bh1770_attribute_group); | |
4734e390 | 1292 | fail1: |
190420ab SO |
1293 | if (chip->pdata->release_resources) |
1294 | chip->pdata->release_resources(); | |
4734e390 | 1295 | fail0: |
190420ab | 1296 | regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); |
190420ab SO |
1297 | return err; |
1298 | } | |
1299 | ||
486a5c28 | 1300 | static int bh1770_remove(struct i2c_client *client) |
190420ab SO |
1301 | { |
1302 | struct bh1770_chip *chip = i2c_get_clientdata(client); | |
1303 | ||
1304 | free_irq(client->irq, chip); | |
1305 | ||
1306 | sysfs_remove_group(&chip->client->dev.kobj, | |
1307 | &bh1770_attribute_group); | |
1308 | ||
1309 | if (chip->pdata->release_resources) | |
1310 | chip->pdata->release_resources(); | |
1311 | ||
1312 | cancel_delayed_work_sync(&chip->prox_work); | |
1313 | ||
1314 | if (!pm_runtime_suspended(&client->dev)) | |
1315 | bh1770_chip_off(chip); | |
1316 | ||
1317 | pm_runtime_disable(&client->dev); | |
1318 | pm_runtime_set_suspended(&client->dev); | |
1319 | ||
190420ab SO |
1320 | return 0; |
1321 | } | |
1322 | ||
0ca19d6f | 1323 | #ifdef CONFIG_PM_SLEEP |
190420ab SO |
1324 | static int bh1770_suspend(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 | ||
1329 | bh1770_chip_off(chip); | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | static int bh1770_resume(struct device *dev) | |
1335 | { | |
1336 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
1337 | struct bh1770_chip *chip = i2c_get_clientdata(client); | |
1338 | int ret = 0; | |
1339 | ||
1340 | bh1770_chip_on(chip); | |
1341 | ||
1342 | if (!pm_runtime_suspended(dev)) { | |
1343 | /* | |
1344 | * If we were enabled at suspend time, it is expected | |
1345 | * everything works nice and smoothly | |
1346 | */ | |
1347 | ret = bh1770_lux_rate(chip, chip->lux_rate_index); | |
1348 | ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE); | |
1349 | ||
1350 | /* This causes interrupt after the next measurement cycle */ | |
1351 | bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, | |
1352 | BH1770_LUX_DEF_THRES); | |
1353 | /* Inform that we are waiting for a result from ALS */ | |
1354 | chip->lux_wait_result = true; | |
1355 | bh1770_prox_mode_control(chip); | |
1356 | } | |
1357 | return ret; | |
1358 | } | |
190420ab SO |
1359 | #endif |
1360 | ||
bbd6d050 | 1361 | #ifdef CONFIG_PM |
190420ab SO |
1362 | static int bh1770_runtime_suspend(struct device *dev) |
1363 | { | |
1364 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
1365 | struct bh1770_chip *chip = i2c_get_clientdata(client); | |
1366 | ||
1367 | bh1770_chip_off(chip); | |
1368 | ||
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | static int bh1770_runtime_resume(struct device *dev) | |
1373 | { | |
1374 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
1375 | struct bh1770_chip *chip = i2c_get_clientdata(client); | |
1376 | ||
1377 | bh1770_chip_on(chip); | |
1378 | ||
1379 | return 0; | |
1380 | } | |
1381 | #endif | |
1382 | ||
1383 | static const struct i2c_device_id bh1770_id[] = { | |
1384 | {"bh1770glc", 0 }, | |
1385 | {"sfh7770", 0 }, | |
1386 | {} | |
1387 | }; | |
1388 | ||
1389 | MODULE_DEVICE_TABLE(i2c, bh1770_id); | |
1390 | ||
1391 | static const struct dev_pm_ops bh1770_pm_ops = { | |
1392 | SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume) | |
1393 | SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL) | |
1394 | }; | |
1395 | ||
1396 | static struct i2c_driver bh1770_driver = { | |
1397 | .driver = { | |
1398 | .name = "bh1770glc", | |
1399 | .owner = THIS_MODULE, | |
1400 | .pm = &bh1770_pm_ops, | |
1401 | }, | |
1402 | .probe = bh1770_probe, | |
2d6bed9c | 1403 | .remove = bh1770_remove, |
190420ab SO |
1404 | .id_table = bh1770_id, |
1405 | }; | |
1406 | ||
a64fe2ed | 1407 | module_i2c_driver(bh1770_driver); |
190420ab SO |
1408 | |
1409 | MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor"); | |
1410 | MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); | |
1411 | MODULE_LICENSE("GPL v2"); |