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36edc939 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
ac45e57f PMS |
2 | /* |
3 | * si1145.c - Support for Silabs SI1132 and SI1141/2/3/5/6/7 combined ambient | |
4 | * light, UV index and proximity sensors | |
5 | * | |
6 | * Copyright 2014-16 Peter Meerwald-Stadler <pmeerw@pmeerw.net> | |
7 | * Copyright 2016 Crestez Dan Leonard <leonard.crestez@intel.com> | |
8 | * | |
ac45e57f PMS |
9 | * SI1132 (7-bit I2C slave address 0x60) |
10 | * SI1141/2/3 (7-bit I2C slave address 0x5a) | |
11 | * SI1145/6/6 (7-bit I2C slave address 0x60) | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/i2c.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/irq.h> | |
ac45e57f PMS |
20 | |
21 | #include <linux/iio/iio.h> | |
22 | #include <linux/iio/sysfs.h> | |
23 | #include <linux/iio/trigger.h> | |
24 | #include <linux/iio/trigger_consumer.h> | |
25 | #include <linux/iio/triggered_buffer.h> | |
26 | #include <linux/iio/buffer.h> | |
27 | #include <linux/util_macros.h> | |
28 | ||
29 | #define SI1145_REG_PART_ID 0x00 | |
30 | #define SI1145_REG_REV_ID 0x01 | |
31 | #define SI1145_REG_SEQ_ID 0x02 | |
32 | #define SI1145_REG_INT_CFG 0x03 | |
33 | #define SI1145_REG_IRQ_ENABLE 0x04 | |
34 | #define SI1145_REG_IRQ_MODE 0x05 | |
35 | #define SI1145_REG_HW_KEY 0x07 | |
36 | #define SI1145_REG_MEAS_RATE 0x08 | |
37 | #define SI1145_REG_PS_LED21 0x0f | |
38 | #define SI1145_REG_PS_LED3 0x10 | |
39 | #define SI1145_REG_UCOEF1 0x13 | |
40 | #define SI1145_REG_UCOEF2 0x14 | |
41 | #define SI1145_REG_UCOEF3 0x15 | |
42 | #define SI1145_REG_UCOEF4 0x16 | |
43 | #define SI1145_REG_PARAM_WR 0x17 | |
44 | #define SI1145_REG_COMMAND 0x18 | |
45 | #define SI1145_REG_RESPONSE 0x20 | |
46 | #define SI1145_REG_IRQ_STATUS 0x21 | |
47 | #define SI1145_REG_ALSVIS_DATA 0x22 | |
48 | #define SI1145_REG_ALSIR_DATA 0x24 | |
49 | #define SI1145_REG_PS1_DATA 0x26 | |
50 | #define SI1145_REG_PS2_DATA 0x28 | |
51 | #define SI1145_REG_PS3_DATA 0x2a | |
52 | #define SI1145_REG_AUX_DATA 0x2c | |
53 | #define SI1145_REG_PARAM_RD 0x2e | |
54 | #define SI1145_REG_CHIP_STAT 0x30 | |
55 | ||
56 | #define SI1145_UCOEF1_DEFAULT 0x7b | |
57 | #define SI1145_UCOEF2_DEFAULT 0x6b | |
58 | #define SI1145_UCOEF3_DEFAULT 0x01 | |
59 | #define SI1145_UCOEF4_DEFAULT 0x00 | |
60 | ||
61 | /* Helper to figure out PS_LED register / shift per channel */ | |
62 | #define SI1145_PS_LED_REG(ch) \ | |
63 | (((ch) == 2) ? SI1145_REG_PS_LED3 : SI1145_REG_PS_LED21) | |
64 | #define SI1145_PS_LED_SHIFT(ch) \ | |
65 | (((ch) == 1) ? 4 : 0) | |
66 | ||
67 | /* Parameter offsets */ | |
68 | #define SI1145_PARAM_CHLIST 0x01 | |
69 | #define SI1145_PARAM_PSLED12_SELECT 0x02 | |
70 | #define SI1145_PARAM_PSLED3_SELECT 0x03 | |
71 | #define SI1145_PARAM_PS_ENCODING 0x05 | |
72 | #define SI1145_PARAM_ALS_ENCODING 0x06 | |
73 | #define SI1145_PARAM_PS1_ADC_MUX 0x07 | |
74 | #define SI1145_PARAM_PS2_ADC_MUX 0x08 | |
75 | #define SI1145_PARAM_PS3_ADC_MUX 0x09 | |
76 | #define SI1145_PARAM_PS_ADC_COUNTER 0x0a | |
77 | #define SI1145_PARAM_PS_ADC_GAIN 0x0b | |
78 | #define SI1145_PARAM_PS_ADC_MISC 0x0c | |
79 | #define SI1145_PARAM_ALS_ADC_MUX 0x0d | |
80 | #define SI1145_PARAM_ALSIR_ADC_MUX 0x0e | |
81 | #define SI1145_PARAM_AUX_ADC_MUX 0x0f | |
82 | #define SI1145_PARAM_ALSVIS_ADC_COUNTER 0x10 | |
83 | #define SI1145_PARAM_ALSVIS_ADC_GAIN 0x11 | |
84 | #define SI1145_PARAM_ALSVIS_ADC_MISC 0x12 | |
85 | #define SI1145_PARAM_LED_RECOVERY 0x1c | |
86 | #define SI1145_PARAM_ALSIR_ADC_COUNTER 0x1d | |
87 | #define SI1145_PARAM_ALSIR_ADC_GAIN 0x1e | |
88 | #define SI1145_PARAM_ALSIR_ADC_MISC 0x1f | |
89 | #define SI1145_PARAM_ADC_OFFSET 0x1a | |
90 | ||
91 | /* Channel enable masks for CHLIST parameter */ | |
92 | #define SI1145_CHLIST_EN_PS1 BIT(0) | |
93 | #define SI1145_CHLIST_EN_PS2 BIT(1) | |
94 | #define SI1145_CHLIST_EN_PS3 BIT(2) | |
95 | #define SI1145_CHLIST_EN_ALSVIS BIT(4) | |
96 | #define SI1145_CHLIST_EN_ALSIR BIT(5) | |
97 | #define SI1145_CHLIST_EN_AUX BIT(6) | |
98 | #define SI1145_CHLIST_EN_UV BIT(7) | |
99 | ||
100 | /* Proximity measurement mode for ADC_MISC parameter */ | |
101 | #define SI1145_PS_ADC_MODE_NORMAL BIT(2) | |
102 | /* Signal range mask for ADC_MISC parameter */ | |
103 | #define SI1145_ADC_MISC_RANGE BIT(5) | |
104 | ||
105 | /* Commands for REG_COMMAND */ | |
106 | #define SI1145_CMD_NOP 0x00 | |
107 | #define SI1145_CMD_RESET 0x01 | |
108 | #define SI1145_CMD_PS_FORCE 0x05 | |
109 | #define SI1145_CMD_ALS_FORCE 0x06 | |
110 | #define SI1145_CMD_PSALS_FORCE 0x07 | |
111 | #define SI1145_CMD_PS_PAUSE 0x09 | |
112 | #define SI1145_CMD_ALS_PAUSE 0x0a | |
113 | #define SI1145_CMD_PSALS_PAUSE 0x0b | |
114 | #define SI1145_CMD_PS_AUTO 0x0d | |
115 | #define SI1145_CMD_ALS_AUTO 0x0e | |
116 | #define SI1145_CMD_PSALS_AUTO 0x0f | |
117 | #define SI1145_CMD_PARAM_QUERY 0x80 | |
118 | #define SI1145_CMD_PARAM_SET 0xa0 | |
119 | ||
120 | #define SI1145_RSP_INVALID_SETTING 0x80 | |
121 | #define SI1145_RSP_COUNTER_MASK 0x0F | |
122 | ||
123 | /* Minimum sleep after each command to ensure it's received */ | |
124 | #define SI1145_COMMAND_MINSLEEP_MS 5 | |
125 | /* Return -ETIMEDOUT after this long */ | |
126 | #define SI1145_COMMAND_TIMEOUT_MS 25 | |
127 | ||
128 | /* Interrupt configuration masks for INT_CFG register */ | |
129 | #define SI1145_INT_CFG_OE BIT(0) /* enable interrupt */ | |
130 | #define SI1145_INT_CFG_MODE BIT(1) /* auto reset interrupt pin */ | |
131 | ||
132 | /* Interrupt enable masks for IRQ_ENABLE register */ | |
133 | #define SI1145_MASK_ALL_IE (BIT(4) | BIT(3) | BIT(2) | BIT(0)) | |
134 | ||
135 | #define SI1145_MUX_TEMP 0x65 | |
136 | #define SI1145_MUX_VDD 0x75 | |
137 | ||
138 | /* Proximity LED current; see Table 2 in datasheet */ | |
139 | #define SI1145_LED_CURRENT_45mA 0x04 | |
140 | ||
141 | enum { | |
142 | SI1132, | |
143 | SI1141, | |
144 | SI1142, | |
145 | SI1143, | |
146 | SI1145, | |
147 | SI1146, | |
148 | SI1147, | |
149 | }; | |
150 | ||
151 | struct si1145_part_info { | |
152 | u8 part; | |
153 | const struct iio_info *iio_info; | |
154 | const struct iio_chan_spec *channels; | |
155 | unsigned int num_channels; | |
156 | unsigned int num_leds; | |
157 | bool uncompressed_meas_rate; | |
158 | }; | |
159 | ||
160 | /** | |
161 | * struct si1145_data - si1145 chip state data | |
162 | * @client: I2C client | |
163 | * @lock: mutex to protect shared state. | |
164 | * @cmdlock: Low-level mutex to protect command execution only | |
165 | * @rsp_seq: Next expected response number or -1 if counter reset required | |
166 | * @scan_mask: Saved scan mask to avoid duplicate set_chlist | |
167 | * @autonomous: If automatic measurements are active (for buffer support) | |
168 | * @part_info: Part information | |
169 | * @trig: Pointer to iio trigger | |
170 | * @meas_rate: Value of MEAS_RATE register. Only set in HW in auto mode | |
171 | */ | |
172 | struct si1145_data { | |
173 | struct i2c_client *client; | |
174 | struct mutex lock; | |
175 | struct mutex cmdlock; | |
176 | int rsp_seq; | |
177 | const struct si1145_part_info *part_info; | |
178 | unsigned long scan_mask; | |
179 | bool autonomous; | |
180 | struct iio_trigger *trig; | |
181 | int meas_rate; | |
182 | }; | |
183 | ||
43b0f929 | 184 | /* |
ac45e57f PMS |
185 | * __si1145_command_reset() - Send CMD_NOP and wait for response 0 |
186 | * | |
187 | * Does not modify data->rsp_seq | |
188 | * | |
189 | * Return: 0 on success and -errno on error. | |
190 | */ | |
191 | static int __si1145_command_reset(struct si1145_data *data) | |
192 | { | |
193 | struct device *dev = &data->client->dev; | |
194 | unsigned long stop_jiffies; | |
195 | int ret; | |
196 | ||
197 | ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, | |
198 | SI1145_CMD_NOP); | |
199 | if (ret < 0) | |
200 | return ret; | |
201 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
202 | ||
203 | stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000; | |
204 | while (true) { | |
205 | ret = i2c_smbus_read_byte_data(data->client, | |
206 | SI1145_REG_RESPONSE); | |
207 | if (ret <= 0) | |
208 | return ret; | |
209 | if (time_after(jiffies, stop_jiffies)) { | |
210 | dev_warn(dev, "timeout on reset\n"); | |
211 | return -ETIMEDOUT; | |
212 | } | |
213 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
214 | continue; | |
215 | } | |
216 | } | |
217 | ||
43b0f929 | 218 | /* |
ac45e57f PMS |
219 | * si1145_command() - Execute a command and poll the response register |
220 | * | |
221 | * All conversion overflows are reported as -EOVERFLOW | |
222 | * INVALID_SETTING is reported as -EINVAL | |
223 | * Timeouts are reported as -ETIMEDOUT | |
224 | * | |
225 | * Return: 0 on success or -errno on failure | |
226 | */ | |
227 | static int si1145_command(struct si1145_data *data, u8 cmd) | |
228 | { | |
229 | struct device *dev = &data->client->dev; | |
230 | unsigned long stop_jiffies; | |
231 | int ret; | |
232 | ||
233 | mutex_lock(&data->cmdlock); | |
234 | ||
235 | if (data->rsp_seq < 0) { | |
236 | ret = __si1145_command_reset(data); | |
237 | if (ret < 0) { | |
238 | dev_err(dev, "failed to reset command counter, ret=%d\n", | |
239 | ret); | |
240 | goto out; | |
241 | } | |
242 | data->rsp_seq = 0; | |
243 | } | |
244 | ||
245 | ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, cmd); | |
246 | if (ret) { | |
247 | dev_warn(dev, "failed to write command, ret=%d\n", ret); | |
248 | goto out; | |
249 | } | |
250 | /* Sleep a little to ensure the command is received */ | |
251 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
252 | ||
253 | stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000; | |
254 | while (true) { | |
255 | ret = i2c_smbus_read_byte_data(data->client, | |
256 | SI1145_REG_RESPONSE); | |
257 | if (ret < 0) { | |
258 | dev_warn(dev, "failed to read response, ret=%d\n", ret); | |
259 | break; | |
260 | } | |
261 | ||
262 | if ((ret & ~SI1145_RSP_COUNTER_MASK) == 0) { | |
263 | if (ret == data->rsp_seq) { | |
264 | if (time_after(jiffies, stop_jiffies)) { | |
265 | dev_warn(dev, "timeout on command %#02hhx\n", | |
266 | cmd); | |
267 | ret = -ETIMEDOUT; | |
268 | break; | |
269 | } | |
270 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
271 | continue; | |
272 | } | |
273 | if (ret == ((data->rsp_seq + 1) & | |
274 | SI1145_RSP_COUNTER_MASK)) { | |
275 | data->rsp_seq = ret; | |
276 | ret = 0; | |
277 | break; | |
278 | } | |
279 | dev_warn(dev, "unexpected response counter %d instead of %d\n", | |
280 | ret, (data->rsp_seq + 1) & | |
281 | SI1145_RSP_COUNTER_MASK); | |
282 | ret = -EIO; | |
283 | } else { | |
284 | if (ret == SI1145_RSP_INVALID_SETTING) { | |
285 | dev_warn(dev, "INVALID_SETTING error on command %#02hhx\n", | |
286 | cmd); | |
287 | ret = -EINVAL; | |
288 | } else { | |
289 | /* All overflows are treated identically */ | |
290 | dev_dbg(dev, "overflow, ret=%d, cmd=%#02hhx\n", | |
291 | ret, cmd); | |
292 | ret = -EOVERFLOW; | |
293 | } | |
294 | } | |
295 | ||
296 | /* Force a counter reset next time */ | |
297 | data->rsp_seq = -1; | |
298 | break; | |
299 | } | |
300 | ||
301 | out: | |
302 | mutex_unlock(&data->cmdlock); | |
303 | ||
304 | return ret; | |
305 | } | |
306 | ||
307 | static int si1145_param_update(struct si1145_data *data, u8 op, u8 param, | |
308 | u8 value) | |
309 | { | |
310 | int ret; | |
311 | ||
312 | ret = i2c_smbus_write_byte_data(data->client, | |
313 | SI1145_REG_PARAM_WR, value); | |
314 | if (ret < 0) | |
315 | return ret; | |
316 | ||
317 | return si1145_command(data, op | (param & 0x1F)); | |
318 | } | |
319 | ||
320 | static int si1145_param_set(struct si1145_data *data, u8 param, u8 value) | |
321 | { | |
322 | return si1145_param_update(data, SI1145_CMD_PARAM_SET, param, value); | |
323 | } | |
324 | ||
325 | /* Set param. Returns negative errno or current value */ | |
326 | static int si1145_param_query(struct si1145_data *data, u8 param) | |
327 | { | |
328 | int ret; | |
329 | ||
330 | ret = si1145_command(data, SI1145_CMD_PARAM_QUERY | (param & 0x1F)); | |
331 | if (ret < 0) | |
332 | return ret; | |
333 | ||
334 | return i2c_smbus_read_byte_data(data->client, SI1145_REG_PARAM_RD); | |
335 | } | |
336 | ||
337 | /* Expand 8 bit compressed value to 16 bit, see Silabs AN498 */ | |
338 | static u16 si1145_uncompress(u8 x) | |
339 | { | |
340 | u16 result = 0; | |
341 | u8 exponent = 0; | |
342 | ||
343 | if (x < 8) | |
344 | return 0; | |
345 | ||
346 | exponent = (x & 0xf0) >> 4; | |
347 | result = 0x10 | (x & 0x0f); | |
348 | ||
349 | if (exponent >= 4) | |
350 | return result << (exponent - 4); | |
351 | return result >> (4 - exponent); | |
352 | } | |
353 | ||
354 | /* Compress 16 bit value to 8 bit, see Silabs AN498 */ | |
355 | static u8 si1145_compress(u16 x) | |
356 | { | |
357 | u32 exponent = 0; | |
358 | u32 significand = 0; | |
359 | u32 tmp = x; | |
360 | ||
361 | if (x == 0x0000) | |
362 | return 0x00; | |
363 | if (x == 0x0001) | |
364 | return 0x08; | |
365 | ||
366 | while (1) { | |
367 | tmp >>= 1; | |
368 | exponent += 1; | |
369 | if (tmp == 1) | |
370 | break; | |
371 | } | |
372 | ||
373 | if (exponent < 5) { | |
374 | significand = x << (4 - exponent); | |
375 | return (exponent << 4) | (significand & 0xF); | |
376 | } | |
377 | ||
378 | significand = x >> (exponent - 5); | |
379 | if (significand & 1) { | |
380 | significand += 2; | |
381 | if (significand & 0x0040) { | |
382 | exponent += 1; | |
383 | significand >>= 1; | |
384 | } | |
385 | } | |
386 | ||
387 | return (exponent << 4) | ((significand >> 1) & 0xF); | |
388 | } | |
389 | ||
390 | /* Write meas_rate in hardware */ | |
391 | static int si1145_set_meas_rate(struct si1145_data *data, int interval) | |
392 | { | |
393 | if (data->part_info->uncompressed_meas_rate) | |
394 | return i2c_smbus_write_word_data(data->client, | |
395 | SI1145_REG_MEAS_RATE, interval); | |
396 | else | |
397 | return i2c_smbus_write_byte_data(data->client, | |
398 | SI1145_REG_MEAS_RATE, interval); | |
399 | } | |
400 | ||
401 | static int si1145_read_samp_freq(struct si1145_data *data, int *val, int *val2) | |
402 | { | |
403 | *val = 32000; | |
404 | if (data->part_info->uncompressed_meas_rate) | |
405 | *val2 = data->meas_rate; | |
406 | else | |
407 | *val2 = si1145_uncompress(data->meas_rate); | |
408 | return IIO_VAL_FRACTIONAL; | |
409 | } | |
410 | ||
411 | /* Set the samp freq in driver private data */ | |
412 | static int si1145_store_samp_freq(struct si1145_data *data, int val) | |
413 | { | |
414 | int ret = 0; | |
415 | int meas_rate; | |
416 | ||
417 | if (val <= 0 || val > 32000) | |
418 | return -ERANGE; | |
419 | meas_rate = 32000 / val; | |
420 | ||
421 | mutex_lock(&data->lock); | |
422 | if (data->autonomous) { | |
423 | ret = si1145_set_meas_rate(data, meas_rate); | |
424 | if (ret) | |
425 | goto out; | |
426 | } | |
427 | if (data->part_info->uncompressed_meas_rate) | |
428 | data->meas_rate = meas_rate; | |
429 | else | |
430 | data->meas_rate = si1145_compress(meas_rate); | |
431 | ||
432 | out: | |
433 | mutex_unlock(&data->lock); | |
434 | ||
435 | return ret; | |
436 | } | |
437 | ||
438 | static irqreturn_t si1145_trigger_handler(int irq, void *private) | |
439 | { | |
440 | struct iio_poll_func *pf = private; | |
441 | struct iio_dev *indio_dev = pf->indio_dev; | |
442 | struct si1145_data *data = iio_priv(indio_dev); | |
443 | /* | |
444 | * Maximum buffer size: | |
445 | * 6*2 bytes channels data + 4 bytes alignment + | |
446 | * 8 bytes timestamp | |
447 | */ | |
448 | u8 buffer[24]; | |
449 | int i, j = 0; | |
450 | int ret; | |
451 | u8 irq_status = 0; | |
452 | ||
453 | if (!data->autonomous) { | |
454 | ret = si1145_command(data, SI1145_CMD_PSALS_FORCE); | |
455 | if (ret < 0 && ret != -EOVERFLOW) | |
456 | goto done; | |
457 | } else { | |
458 | irq_status = ret = i2c_smbus_read_byte_data(data->client, | |
459 | SI1145_REG_IRQ_STATUS); | |
460 | if (ret < 0) | |
461 | goto done; | |
462 | if (!(irq_status & SI1145_MASK_ALL_IE)) | |
463 | goto done; | |
464 | } | |
465 | ||
466 | for_each_set_bit(i, indio_dev->active_scan_mask, | |
467 | indio_dev->masklength) { | |
468 | int run = 1; | |
469 | ||
470 | while (i + run < indio_dev->masklength) { | |
471 | if (!test_bit(i + run, indio_dev->active_scan_mask)) | |
472 | break; | |
473 | if (indio_dev->channels[i + run].address != | |
474 | indio_dev->channels[i].address + 2 * run) | |
475 | break; | |
476 | run++; | |
477 | } | |
478 | ||
479 | ret = i2c_smbus_read_i2c_block_data_or_emulated( | |
480 | data->client, indio_dev->channels[i].address, | |
481 | sizeof(u16) * run, &buffer[j]); | |
482 | if (ret < 0) | |
483 | goto done; | |
484 | j += run * sizeof(u16); | |
485 | i += run - 1; | |
486 | } | |
487 | ||
488 | if (data->autonomous) { | |
489 | ret = i2c_smbus_write_byte_data(data->client, | |
490 | SI1145_REG_IRQ_STATUS, | |
491 | irq_status & SI1145_MASK_ALL_IE); | |
492 | if (ret < 0) | |
493 | goto done; | |
494 | } | |
495 | ||
496 | iio_push_to_buffers_with_timestamp(indio_dev, buffer, | |
497 | iio_get_time_ns(indio_dev)); | |
498 | ||
499 | done: | |
500 | iio_trigger_notify_done(indio_dev->trig); | |
501 | return IRQ_HANDLED; | |
502 | } | |
503 | ||
504 | static int si1145_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask) | |
505 | { | |
506 | struct si1145_data *data = iio_priv(indio_dev); | |
507 | u8 reg = 0, mux; | |
508 | int ret; | |
509 | int i; | |
510 | ||
511 | /* channel list already set, no need to reprogram */ | |
512 | if (data->scan_mask == scan_mask) | |
513 | return 0; | |
514 | ||
515 | for_each_set_bit(i, &scan_mask, indio_dev->masklength) { | |
516 | switch (indio_dev->channels[i].address) { | |
517 | case SI1145_REG_ALSVIS_DATA: | |
518 | reg |= SI1145_CHLIST_EN_ALSVIS; | |
519 | break; | |
520 | case SI1145_REG_ALSIR_DATA: | |
521 | reg |= SI1145_CHLIST_EN_ALSIR; | |
522 | break; | |
523 | case SI1145_REG_PS1_DATA: | |
524 | reg |= SI1145_CHLIST_EN_PS1; | |
525 | break; | |
526 | case SI1145_REG_PS2_DATA: | |
527 | reg |= SI1145_CHLIST_EN_PS2; | |
528 | break; | |
529 | case SI1145_REG_PS3_DATA: | |
530 | reg |= SI1145_CHLIST_EN_PS3; | |
531 | break; | |
532 | case SI1145_REG_AUX_DATA: | |
533 | switch (indio_dev->channels[i].type) { | |
534 | case IIO_UVINDEX: | |
535 | reg |= SI1145_CHLIST_EN_UV; | |
536 | break; | |
537 | default: | |
538 | reg |= SI1145_CHLIST_EN_AUX; | |
539 | if (indio_dev->channels[i].type == IIO_TEMP) | |
540 | mux = SI1145_MUX_TEMP; | |
541 | else | |
542 | mux = SI1145_MUX_VDD; | |
543 | ret = si1145_param_set(data, | |
544 | SI1145_PARAM_AUX_ADC_MUX, mux); | |
545 | if (ret < 0) | |
546 | return ret; | |
547 | ||
548 | break; | |
549 | } | |
550 | } | |
551 | } | |
552 | ||
553 | data->scan_mask = scan_mask; | |
554 | ret = si1145_param_set(data, SI1145_PARAM_CHLIST, reg); | |
555 | ||
556 | return ret < 0 ? ret : 0; | |
557 | } | |
558 | ||
559 | static int si1145_measure(struct iio_dev *indio_dev, | |
560 | struct iio_chan_spec const *chan) | |
561 | { | |
562 | struct si1145_data *data = iio_priv(indio_dev); | |
563 | u8 cmd; | |
564 | int ret; | |
565 | ||
566 | ret = si1145_set_chlist(indio_dev, BIT(chan->scan_index)); | |
567 | if (ret < 0) | |
568 | return ret; | |
569 | ||
570 | cmd = (chan->type == IIO_PROXIMITY) ? SI1145_CMD_PS_FORCE : | |
571 | SI1145_CMD_ALS_FORCE; | |
572 | ret = si1145_command(data, cmd); | |
573 | if (ret < 0 && ret != -EOVERFLOW) | |
574 | return ret; | |
575 | ||
576 | return i2c_smbus_read_word_data(data->client, chan->address); | |
577 | } | |
578 | ||
579 | /* | |
580 | * Conversion between iio scale and ADC_GAIN values | |
581 | * These could be further adjusted but proximity/intensity are dimensionless | |
582 | */ | |
583 | static const int si1145_proximity_scale_available[] = { | |
584 | 128, 64, 32, 16, 8, 4}; | |
585 | static const int si1145_intensity_scale_available[] = { | |
586 | 128, 64, 32, 16, 8, 4, 2, 1}; | |
587 | static IIO_CONST_ATTR(in_proximity_scale_available, | |
588 | "128 64 32 16 8 4"); | |
589 | static IIO_CONST_ATTR(in_intensity_scale_available, | |
590 | "128 64 32 16 8 4 2 1"); | |
591 | static IIO_CONST_ATTR(in_intensity_ir_scale_available, | |
592 | "128 64 32 16 8 4 2 1"); | |
593 | ||
594 | static int si1145_scale_from_adcgain(int regval) | |
595 | { | |
596 | return 128 >> regval; | |
597 | } | |
598 | ||
599 | static int si1145_proximity_adcgain_from_scale(int val, int val2) | |
600 | { | |
601 | val = find_closest_descending(val, si1145_proximity_scale_available, | |
602 | ARRAY_SIZE(si1145_proximity_scale_available)); | |
603 | if (val < 0 || val > 5 || val2 != 0) | |
604 | return -EINVAL; | |
605 | ||
606 | return val; | |
607 | } | |
608 | ||
609 | static int si1145_intensity_adcgain_from_scale(int val, int val2) | |
610 | { | |
611 | val = find_closest_descending(val, si1145_intensity_scale_available, | |
612 | ARRAY_SIZE(si1145_intensity_scale_available)); | |
613 | if (val < 0 || val > 7 || val2 != 0) | |
614 | return -EINVAL; | |
615 | ||
616 | return val; | |
617 | } | |
618 | ||
619 | static int si1145_read_raw(struct iio_dev *indio_dev, | |
620 | struct iio_chan_spec const *chan, | |
621 | int *val, int *val2, long mask) | |
622 | { | |
623 | struct si1145_data *data = iio_priv(indio_dev); | |
624 | int ret; | |
625 | u8 reg; | |
626 | ||
627 | switch (mask) { | |
628 | case IIO_CHAN_INFO_RAW: | |
629 | switch (chan->type) { | |
630 | case IIO_INTENSITY: | |
631 | case IIO_PROXIMITY: | |
632 | case IIO_VOLTAGE: | |
633 | case IIO_TEMP: | |
634 | case IIO_UVINDEX: | |
635 | ret = iio_device_claim_direct_mode(indio_dev); | |
636 | if (ret) | |
637 | return ret; | |
638 | ret = si1145_measure(indio_dev, chan); | |
639 | iio_device_release_direct_mode(indio_dev); | |
640 | ||
641 | if (ret < 0) | |
642 | return ret; | |
643 | ||
644 | *val = ret; | |
645 | ||
646 | return IIO_VAL_INT; | |
647 | case IIO_CURRENT: | |
648 | ret = i2c_smbus_read_byte_data(data->client, | |
649 | SI1145_PS_LED_REG(chan->channel)); | |
650 | if (ret < 0) | |
651 | return ret; | |
652 | ||
653 | *val = (ret >> SI1145_PS_LED_SHIFT(chan->channel)) | |
654 | & 0x0f; | |
655 | ||
656 | return IIO_VAL_INT; | |
657 | default: | |
658 | return -EINVAL; | |
659 | } | |
660 | case IIO_CHAN_INFO_SCALE: | |
661 | switch (chan->type) { | |
662 | case IIO_PROXIMITY: | |
663 | reg = SI1145_PARAM_PS_ADC_GAIN; | |
664 | break; | |
665 | case IIO_INTENSITY: | |
666 | if (chan->channel2 == IIO_MOD_LIGHT_IR) | |
667 | reg = SI1145_PARAM_ALSIR_ADC_GAIN; | |
668 | else | |
669 | reg = SI1145_PARAM_ALSVIS_ADC_GAIN; | |
670 | break; | |
671 | case IIO_TEMP: | |
672 | *val = 28; | |
673 | *val2 = 571429; | |
674 | return IIO_VAL_INT_PLUS_MICRO; | |
675 | case IIO_UVINDEX: | |
676 | *val = 0; | |
677 | *val2 = 10000; | |
678 | return IIO_VAL_INT_PLUS_MICRO; | |
679 | default: | |
680 | return -EINVAL; | |
681 | } | |
682 | ||
683 | ret = si1145_param_query(data, reg); | |
684 | if (ret < 0) | |
685 | return ret; | |
686 | ||
687 | *val = si1145_scale_from_adcgain(ret & 0x07); | |
688 | ||
689 | return IIO_VAL_INT; | |
690 | case IIO_CHAN_INFO_OFFSET: | |
691 | switch (chan->type) { | |
692 | case IIO_TEMP: | |
693 | /* | |
694 | * -ADC offset - ADC counts @ 25°C - | |
695 | * 35 * ADC counts / °C | |
696 | */ | |
697 | *val = -256 - 11136 + 25 * 35; | |
698 | return IIO_VAL_INT; | |
699 | default: | |
700 | /* | |
701 | * All ADC measurements have are by default offset | |
702 | * by -256 | |
703 | * See AN498 5.6.3 | |
704 | */ | |
705 | ret = si1145_param_query(data, SI1145_PARAM_ADC_OFFSET); | |
706 | if (ret < 0) | |
707 | return ret; | |
708 | *val = -si1145_uncompress(ret); | |
709 | return IIO_VAL_INT; | |
710 | } | |
711 | case IIO_CHAN_INFO_SAMP_FREQ: | |
712 | return si1145_read_samp_freq(data, val, val2); | |
713 | default: | |
714 | return -EINVAL; | |
715 | } | |
716 | } | |
717 | ||
718 | static int si1145_write_raw(struct iio_dev *indio_dev, | |
719 | struct iio_chan_spec const *chan, | |
720 | int val, int val2, long mask) | |
721 | { | |
722 | struct si1145_data *data = iio_priv(indio_dev); | |
723 | u8 reg1, reg2, shift; | |
724 | int ret; | |
725 | ||
726 | switch (mask) { | |
727 | case IIO_CHAN_INFO_SCALE: | |
728 | switch (chan->type) { | |
729 | case IIO_PROXIMITY: | |
730 | val = si1145_proximity_adcgain_from_scale(val, val2); | |
731 | if (val < 0) | |
732 | return val; | |
733 | reg1 = SI1145_PARAM_PS_ADC_GAIN; | |
734 | reg2 = SI1145_PARAM_PS_ADC_COUNTER; | |
735 | break; | |
736 | case IIO_INTENSITY: | |
737 | val = si1145_intensity_adcgain_from_scale(val, val2); | |
738 | if (val < 0) | |
739 | return val; | |
740 | if (chan->channel2 == IIO_MOD_LIGHT_IR) { | |
741 | reg1 = SI1145_PARAM_ALSIR_ADC_GAIN; | |
742 | reg2 = SI1145_PARAM_ALSIR_ADC_COUNTER; | |
743 | } else { | |
744 | reg1 = SI1145_PARAM_ALSVIS_ADC_GAIN; | |
745 | reg2 = SI1145_PARAM_ALSVIS_ADC_COUNTER; | |
746 | } | |
747 | break; | |
748 | default: | |
749 | return -EINVAL; | |
750 | } | |
751 | ||
752 | ret = iio_device_claim_direct_mode(indio_dev); | |
753 | if (ret) | |
754 | return ret; | |
755 | ||
756 | ret = si1145_param_set(data, reg1, val); | |
757 | if (ret < 0) { | |
758 | iio_device_release_direct_mode(indio_dev); | |
759 | return ret; | |
760 | } | |
761 | /* Set recovery period to one's complement of gain */ | |
762 | ret = si1145_param_set(data, reg2, (~val & 0x07) << 4); | |
763 | iio_device_release_direct_mode(indio_dev); | |
764 | return ret; | |
765 | case IIO_CHAN_INFO_RAW: | |
766 | if (chan->type != IIO_CURRENT) | |
767 | return -EINVAL; | |
768 | ||
769 | if (val < 0 || val > 15 || val2 != 0) | |
770 | return -EINVAL; | |
771 | ||
772 | reg1 = SI1145_PS_LED_REG(chan->channel); | |
773 | shift = SI1145_PS_LED_SHIFT(chan->channel); | |
774 | ||
775 | ret = iio_device_claim_direct_mode(indio_dev); | |
776 | if (ret) | |
777 | return ret; | |
778 | ||
779 | ret = i2c_smbus_read_byte_data(data->client, reg1); | |
780 | if (ret < 0) { | |
781 | iio_device_release_direct_mode(indio_dev); | |
782 | return ret; | |
783 | } | |
784 | ret = i2c_smbus_write_byte_data(data->client, reg1, | |
785 | (ret & ~(0x0f << shift)) | | |
786 | ((val & 0x0f) << shift)); | |
787 | iio_device_release_direct_mode(indio_dev); | |
788 | return ret; | |
789 | case IIO_CHAN_INFO_SAMP_FREQ: | |
790 | return si1145_store_samp_freq(data, val); | |
791 | default: | |
792 | return -EINVAL; | |
793 | } | |
794 | } | |
795 | ||
796 | #define SI1145_ST { \ | |
797 | .sign = 'u', \ | |
798 | .realbits = 16, \ | |
799 | .storagebits = 16, \ | |
800 | .endianness = IIO_LE, \ | |
801 | } | |
802 | ||
803 | #define SI1145_INTENSITY_CHANNEL(_si) { \ | |
804 | .type = IIO_INTENSITY, \ | |
805 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
806 | BIT(IIO_CHAN_INFO_OFFSET) | \ | |
807 | BIT(IIO_CHAN_INFO_SCALE), \ | |
808 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
809 | .scan_type = SI1145_ST, \ | |
810 | .scan_index = _si, \ | |
811 | .address = SI1145_REG_ALSVIS_DATA, \ | |
812 | } | |
813 | ||
814 | #define SI1145_INTENSITY_IR_CHANNEL(_si) { \ | |
815 | .type = IIO_INTENSITY, \ | |
816 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
817 | BIT(IIO_CHAN_INFO_OFFSET) | \ | |
818 | BIT(IIO_CHAN_INFO_SCALE), \ | |
819 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
820 | .modified = 1, \ | |
821 | .channel2 = IIO_MOD_LIGHT_IR, \ | |
822 | .scan_type = SI1145_ST, \ | |
823 | .scan_index = _si, \ | |
824 | .address = SI1145_REG_ALSIR_DATA, \ | |
825 | } | |
826 | ||
827 | #define SI1145_TEMP_CHANNEL(_si) { \ | |
828 | .type = IIO_TEMP, \ | |
829 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
830 | BIT(IIO_CHAN_INFO_OFFSET) | \ | |
831 | BIT(IIO_CHAN_INFO_SCALE), \ | |
832 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
833 | .scan_type = SI1145_ST, \ | |
834 | .scan_index = _si, \ | |
835 | .address = SI1145_REG_AUX_DATA, \ | |
836 | } | |
837 | ||
838 | #define SI1145_UV_CHANNEL(_si) { \ | |
839 | .type = IIO_UVINDEX, \ | |
840 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
841 | BIT(IIO_CHAN_INFO_SCALE), \ | |
842 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
843 | .scan_type = SI1145_ST, \ | |
844 | .scan_index = _si, \ | |
845 | .address = SI1145_REG_AUX_DATA, \ | |
846 | } | |
847 | ||
848 | #define SI1145_PROXIMITY_CHANNEL(_si, _ch) { \ | |
849 | .type = IIO_PROXIMITY, \ | |
850 | .indexed = 1, \ | |
851 | .channel = _ch, \ | |
852 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
853 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ | |
854 | BIT(IIO_CHAN_INFO_OFFSET), \ | |
855 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
856 | .scan_type = SI1145_ST, \ | |
857 | .scan_index = _si, \ | |
858 | .address = SI1145_REG_PS1_DATA + _ch * 2, \ | |
859 | } | |
860 | ||
861 | #define SI1145_VOLTAGE_CHANNEL(_si) { \ | |
862 | .type = IIO_VOLTAGE, \ | |
863 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
864 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
865 | .scan_type = SI1145_ST, \ | |
866 | .scan_index = _si, \ | |
867 | .address = SI1145_REG_AUX_DATA, \ | |
868 | } | |
869 | ||
870 | #define SI1145_CURRENT_CHANNEL(_ch) { \ | |
871 | .type = IIO_CURRENT, \ | |
872 | .indexed = 1, \ | |
873 | .channel = _ch, \ | |
874 | .output = 1, \ | |
875 | .scan_index = -1, \ | |
876 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
877 | } | |
878 | ||
879 | static const struct iio_chan_spec si1132_channels[] = { | |
880 | SI1145_INTENSITY_CHANNEL(0), | |
881 | SI1145_INTENSITY_IR_CHANNEL(1), | |
882 | SI1145_TEMP_CHANNEL(2), | |
883 | SI1145_VOLTAGE_CHANNEL(3), | |
884 | SI1145_UV_CHANNEL(4), | |
885 | IIO_CHAN_SOFT_TIMESTAMP(6), | |
886 | }; | |
887 | ||
888 | static const struct iio_chan_spec si1141_channels[] = { | |
889 | SI1145_INTENSITY_CHANNEL(0), | |
890 | SI1145_INTENSITY_IR_CHANNEL(1), | |
891 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
892 | SI1145_TEMP_CHANNEL(3), | |
893 | SI1145_VOLTAGE_CHANNEL(4), | |
894 | IIO_CHAN_SOFT_TIMESTAMP(5), | |
895 | SI1145_CURRENT_CHANNEL(0), | |
896 | }; | |
897 | ||
898 | static const struct iio_chan_spec si1142_channels[] = { | |
899 | SI1145_INTENSITY_CHANNEL(0), | |
900 | SI1145_INTENSITY_IR_CHANNEL(1), | |
901 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
902 | SI1145_PROXIMITY_CHANNEL(3, 1), | |
903 | SI1145_TEMP_CHANNEL(4), | |
904 | SI1145_VOLTAGE_CHANNEL(5), | |
905 | IIO_CHAN_SOFT_TIMESTAMP(6), | |
906 | SI1145_CURRENT_CHANNEL(0), | |
907 | SI1145_CURRENT_CHANNEL(1), | |
908 | }; | |
909 | ||
910 | static const struct iio_chan_spec si1143_channels[] = { | |
911 | SI1145_INTENSITY_CHANNEL(0), | |
912 | SI1145_INTENSITY_IR_CHANNEL(1), | |
913 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
914 | SI1145_PROXIMITY_CHANNEL(3, 1), | |
915 | SI1145_PROXIMITY_CHANNEL(4, 2), | |
916 | SI1145_TEMP_CHANNEL(5), | |
917 | SI1145_VOLTAGE_CHANNEL(6), | |
918 | IIO_CHAN_SOFT_TIMESTAMP(7), | |
919 | SI1145_CURRENT_CHANNEL(0), | |
920 | SI1145_CURRENT_CHANNEL(1), | |
921 | SI1145_CURRENT_CHANNEL(2), | |
922 | }; | |
923 | ||
924 | static const struct iio_chan_spec si1145_channels[] = { | |
925 | SI1145_INTENSITY_CHANNEL(0), | |
926 | SI1145_INTENSITY_IR_CHANNEL(1), | |
927 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
928 | SI1145_TEMP_CHANNEL(3), | |
929 | SI1145_VOLTAGE_CHANNEL(4), | |
930 | SI1145_UV_CHANNEL(5), | |
931 | IIO_CHAN_SOFT_TIMESTAMP(6), | |
932 | SI1145_CURRENT_CHANNEL(0), | |
933 | }; | |
934 | ||
935 | static const struct iio_chan_spec si1146_channels[] = { | |
936 | SI1145_INTENSITY_CHANNEL(0), | |
937 | SI1145_INTENSITY_IR_CHANNEL(1), | |
938 | SI1145_TEMP_CHANNEL(2), | |
939 | SI1145_VOLTAGE_CHANNEL(3), | |
940 | SI1145_UV_CHANNEL(4), | |
941 | SI1145_PROXIMITY_CHANNEL(5, 0), | |
942 | SI1145_PROXIMITY_CHANNEL(6, 1), | |
943 | IIO_CHAN_SOFT_TIMESTAMP(7), | |
944 | SI1145_CURRENT_CHANNEL(0), | |
945 | SI1145_CURRENT_CHANNEL(1), | |
946 | }; | |
947 | ||
948 | static const struct iio_chan_spec si1147_channels[] = { | |
949 | SI1145_INTENSITY_CHANNEL(0), | |
950 | SI1145_INTENSITY_IR_CHANNEL(1), | |
951 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
952 | SI1145_PROXIMITY_CHANNEL(3, 1), | |
953 | SI1145_PROXIMITY_CHANNEL(4, 2), | |
954 | SI1145_TEMP_CHANNEL(5), | |
955 | SI1145_VOLTAGE_CHANNEL(6), | |
956 | SI1145_UV_CHANNEL(7), | |
957 | IIO_CHAN_SOFT_TIMESTAMP(8), | |
958 | SI1145_CURRENT_CHANNEL(0), | |
959 | SI1145_CURRENT_CHANNEL(1), | |
960 | SI1145_CURRENT_CHANNEL(2), | |
961 | }; | |
962 | ||
963 | static struct attribute *si1132_attributes[] = { | |
964 | &iio_const_attr_in_intensity_scale_available.dev_attr.attr, | |
965 | &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr, | |
966 | NULL, | |
967 | }; | |
968 | ||
969 | static struct attribute *si114x_attributes[] = { | |
970 | &iio_const_attr_in_intensity_scale_available.dev_attr.attr, | |
971 | &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr, | |
972 | &iio_const_attr_in_proximity_scale_available.dev_attr.attr, | |
973 | NULL, | |
974 | }; | |
975 | ||
976 | static const struct attribute_group si1132_attribute_group = { | |
977 | .attrs = si1132_attributes, | |
978 | }; | |
979 | ||
980 | static const struct attribute_group si114x_attribute_group = { | |
981 | .attrs = si114x_attributes, | |
982 | }; | |
983 | ||
984 | ||
985 | static const struct iio_info si1132_info = { | |
986 | .read_raw = si1145_read_raw, | |
987 | .write_raw = si1145_write_raw, | |
ac45e57f PMS |
988 | .attrs = &si1132_attribute_group, |
989 | }; | |
990 | ||
991 | static const struct iio_info si114x_info = { | |
992 | .read_raw = si1145_read_raw, | |
993 | .write_raw = si1145_write_raw, | |
ac45e57f PMS |
994 | .attrs = &si114x_attribute_group, |
995 | }; | |
996 | ||
997 | #define SI1145_PART(id, iio_info, chans, leds, uncompressed_meas_rate) \ | |
998 | {id, iio_info, chans, ARRAY_SIZE(chans), leds, uncompressed_meas_rate} | |
999 | ||
1000 | static const struct si1145_part_info si1145_part_info[] = { | |
1001 | [SI1132] = SI1145_PART(0x32, &si1132_info, si1132_channels, 0, true), | |
1002 | [SI1141] = SI1145_PART(0x41, &si114x_info, si1141_channels, 1, false), | |
1003 | [SI1142] = SI1145_PART(0x42, &si114x_info, si1142_channels, 2, false), | |
1004 | [SI1143] = SI1145_PART(0x43, &si114x_info, si1143_channels, 3, false), | |
1005 | [SI1145] = SI1145_PART(0x45, &si114x_info, si1145_channels, 1, true), | |
1006 | [SI1146] = SI1145_PART(0x46, &si114x_info, si1146_channels, 2, true), | |
1007 | [SI1147] = SI1145_PART(0x47, &si114x_info, si1147_channels, 3, true), | |
1008 | }; | |
1009 | ||
1010 | static int si1145_initialize(struct si1145_data *data) | |
1011 | { | |
1012 | struct i2c_client *client = data->client; | |
1013 | int ret; | |
1014 | ||
1015 | ret = i2c_smbus_write_byte_data(client, SI1145_REG_COMMAND, | |
1016 | SI1145_CMD_RESET); | |
1017 | if (ret < 0) | |
1018 | return ret; | |
1019 | msleep(SI1145_COMMAND_TIMEOUT_MS); | |
1020 | ||
1021 | /* Hardware key, magic value */ | |
1022 | ret = i2c_smbus_write_byte_data(client, SI1145_REG_HW_KEY, 0x17); | |
1023 | if (ret < 0) | |
1024 | return ret; | |
1025 | msleep(SI1145_COMMAND_TIMEOUT_MS); | |
1026 | ||
1027 | /* Turn off autonomous mode */ | |
1028 | ret = si1145_set_meas_rate(data, 0); | |
1029 | if (ret < 0) | |
1030 | return ret; | |
1031 | ||
1032 | /* Initialize sampling freq to 10 Hz */ | |
1033 | ret = si1145_store_samp_freq(data, 10); | |
1034 | if (ret < 0) | |
1035 | return ret; | |
1036 | ||
1037 | /* Set LED currents to 45 mA; have 4 bits, see Table 2 in datasheet */ | |
1038 | switch (data->part_info->num_leds) { | |
1039 | case 3: | |
1040 | ret = i2c_smbus_write_byte_data(client, | |
1041 | SI1145_REG_PS_LED3, | |
1042 | SI1145_LED_CURRENT_45mA); | |
1043 | if (ret < 0) | |
1044 | return ret; | |
df561f66 | 1045 | fallthrough; |
ac45e57f PMS |
1046 | case 2: |
1047 | ret = i2c_smbus_write_byte_data(client, | |
1048 | SI1145_REG_PS_LED21, | |
1049 | (SI1145_LED_CURRENT_45mA << 4) | | |
1050 | SI1145_LED_CURRENT_45mA); | |
1051 | break; | |
1052 | case 1: | |
1053 | ret = i2c_smbus_write_byte_data(client, | |
1054 | SI1145_REG_PS_LED21, | |
1055 | SI1145_LED_CURRENT_45mA); | |
1056 | break; | |
1057 | default: | |
1058 | ret = 0; | |
1059 | break; | |
1060 | } | |
1061 | if (ret < 0) | |
1062 | return ret; | |
1063 | ||
1064 | /* Set normal proximity measurement mode */ | |
1065 | ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_MISC, | |
1066 | SI1145_PS_ADC_MODE_NORMAL); | |
1067 | if (ret < 0) | |
1068 | return ret; | |
1069 | ||
1070 | ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_GAIN, 0x01); | |
1071 | if (ret < 0) | |
1072 | return ret; | |
1073 | ||
1074 | /* ADC_COUNTER should be one complement of ADC_GAIN */ | |
1075 | ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_COUNTER, 0x06 << 4); | |
1076 | if (ret < 0) | |
1077 | return ret; | |
1078 | ||
1079 | /* Set ALS visible measurement mode */ | |
1080 | ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_MISC, | |
1081 | SI1145_ADC_MISC_RANGE); | |
1082 | if (ret < 0) | |
1083 | return ret; | |
1084 | ||
1085 | ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_GAIN, 0x03); | |
1086 | if (ret < 0) | |
1087 | return ret; | |
1088 | ||
1089 | ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_COUNTER, | |
1090 | 0x04 << 4); | |
1091 | if (ret < 0) | |
1092 | return ret; | |
1093 | ||
1094 | /* Set ALS IR measurement mode */ | |
1095 | ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_MISC, | |
1096 | SI1145_ADC_MISC_RANGE); | |
1097 | if (ret < 0) | |
1098 | return ret; | |
1099 | ||
1100 | ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_GAIN, 0x01); | |
1101 | if (ret < 0) | |
1102 | return ret; | |
1103 | ||
1104 | ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_COUNTER, | |
1105 | 0x06 << 4); | |
1106 | if (ret < 0) | |
1107 | return ret; | |
1108 | ||
1109 | /* | |
1110 | * Initialize UCOEF to default values in datasheet | |
1111 | * These registers are normally zero on reset | |
1112 | */ | |
1113 | if (data->part_info == &si1145_part_info[SI1132] || | |
1114 | data->part_info == &si1145_part_info[SI1145] || | |
1115 | data->part_info == &si1145_part_info[SI1146] || | |
1116 | data->part_info == &si1145_part_info[SI1147]) { | |
1117 | ret = i2c_smbus_write_byte_data(data->client, | |
1118 | SI1145_REG_UCOEF1, | |
1119 | SI1145_UCOEF1_DEFAULT); | |
1120 | if (ret < 0) | |
1121 | return ret; | |
1122 | ret = i2c_smbus_write_byte_data(data->client, | |
1123 | SI1145_REG_UCOEF2, SI1145_UCOEF2_DEFAULT); | |
1124 | if (ret < 0) | |
1125 | return ret; | |
1126 | ret = i2c_smbus_write_byte_data(data->client, | |
1127 | SI1145_REG_UCOEF3, SI1145_UCOEF3_DEFAULT); | |
1128 | if (ret < 0) | |
1129 | return ret; | |
1130 | ret = i2c_smbus_write_byte_data(data->client, | |
1131 | SI1145_REG_UCOEF4, SI1145_UCOEF4_DEFAULT); | |
1132 | if (ret < 0) | |
1133 | return ret; | |
1134 | } | |
1135 | ||
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Program the channels we want to measure with CMD_PSALS_AUTO. No need for | |
1141 | * _postdisable as we stop with CMD_PSALS_PAUSE; single measurement (direct) | |
1142 | * mode reprograms the channels list anyway... | |
1143 | */ | |
1144 | static int si1145_buffer_preenable(struct iio_dev *indio_dev) | |
1145 | { | |
1146 | struct si1145_data *data = iio_priv(indio_dev); | |
1147 | int ret; | |
1148 | ||
1149 | mutex_lock(&data->lock); | |
1150 | ret = si1145_set_chlist(indio_dev, *indio_dev->active_scan_mask); | |
1151 | mutex_unlock(&data->lock); | |
1152 | ||
1153 | return ret; | |
1154 | } | |
1155 | ||
1156 | static bool si1145_validate_scan_mask(struct iio_dev *indio_dev, | |
1157 | const unsigned long *scan_mask) | |
1158 | { | |
1159 | struct si1145_data *data = iio_priv(indio_dev); | |
1160 | unsigned int count = 0; | |
1161 | int i; | |
1162 | ||
1163 | /* Check that at most one AUX channel is enabled */ | |
1164 | for_each_set_bit(i, scan_mask, data->part_info->num_channels) { | |
1165 | if (indio_dev->channels[i].address == SI1145_REG_AUX_DATA) | |
1166 | count++; | |
1167 | } | |
1168 | ||
1169 | return count <= 1; | |
1170 | } | |
1171 | ||
1172 | static const struct iio_buffer_setup_ops si1145_buffer_setup_ops = { | |
1173 | .preenable = si1145_buffer_preenable, | |
ac45e57f PMS |
1174 | .validate_scan_mask = si1145_validate_scan_mask, |
1175 | }; | |
1176 | ||
43b0f929 | 1177 | /* |
ac45e57f PMS |
1178 | * si1145_trigger_set_state() - Set trigger state |
1179 | * | |
1180 | * When not using triggers interrupts are disabled and measurement rate is | |
1181 | * set to zero in order to minimize power consumption. | |
1182 | */ | |
1183 | static int si1145_trigger_set_state(struct iio_trigger *trig, bool state) | |
1184 | { | |
1185 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); | |
1186 | struct si1145_data *data = iio_priv(indio_dev); | |
1187 | int err = 0, ret; | |
1188 | ||
1189 | mutex_lock(&data->lock); | |
1190 | ||
1191 | if (state) { | |
1192 | data->autonomous = true; | |
1193 | err = i2c_smbus_write_byte_data(data->client, | |
1194 | SI1145_REG_INT_CFG, SI1145_INT_CFG_OE); | |
1195 | if (err < 0) | |
1196 | goto disable; | |
1197 | err = i2c_smbus_write_byte_data(data->client, | |
1198 | SI1145_REG_IRQ_ENABLE, SI1145_MASK_ALL_IE); | |
1199 | if (err < 0) | |
1200 | goto disable; | |
1201 | err = si1145_set_meas_rate(data, data->meas_rate); | |
1202 | if (err < 0) | |
1203 | goto disable; | |
1204 | err = si1145_command(data, SI1145_CMD_PSALS_AUTO); | |
1205 | if (err < 0) | |
1206 | goto disable; | |
1207 | } else { | |
1208 | disable: | |
1209 | /* Disable as much as possible skipping errors */ | |
1210 | ret = si1145_command(data, SI1145_CMD_PSALS_PAUSE); | |
1211 | if (ret < 0 && !err) | |
1212 | err = ret; | |
1213 | ret = si1145_set_meas_rate(data, 0); | |
1214 | if (ret < 0 && !err) | |
1215 | err = ret; | |
1216 | ret = i2c_smbus_write_byte_data(data->client, | |
1217 | SI1145_REG_IRQ_ENABLE, 0); | |
1218 | if (ret < 0 && !err) | |
1219 | err = ret; | |
1220 | ret = i2c_smbus_write_byte_data(data->client, | |
1221 | SI1145_REG_INT_CFG, 0); | |
1222 | if (ret < 0 && !err) | |
1223 | err = ret; | |
1224 | data->autonomous = false; | |
1225 | } | |
1226 | ||
1227 | mutex_unlock(&data->lock); | |
1228 | return err; | |
1229 | } | |
1230 | ||
1231 | static const struct iio_trigger_ops si1145_trigger_ops = { | |
ac45e57f PMS |
1232 | .set_trigger_state = si1145_trigger_set_state, |
1233 | }; | |
1234 | ||
1235 | static int si1145_probe_trigger(struct iio_dev *indio_dev) | |
1236 | { | |
1237 | struct si1145_data *data = iio_priv(indio_dev); | |
1238 | struct i2c_client *client = data->client; | |
1239 | struct iio_trigger *trig; | |
1240 | int ret; | |
1241 | ||
1242 | trig = devm_iio_trigger_alloc(&client->dev, | |
1243 | "%s-dev%d", indio_dev->name, indio_dev->id); | |
1244 | if (!trig) | |
1245 | return -ENOMEM; | |
1246 | ||
1247 | trig->dev.parent = &client->dev; | |
1248 | trig->ops = &si1145_trigger_ops; | |
1249 | iio_trigger_set_drvdata(trig, indio_dev); | |
1250 | ||
1251 | ret = devm_request_irq(&client->dev, client->irq, | |
1252 | iio_trigger_generic_data_rdy_poll, | |
1253 | IRQF_TRIGGER_FALLING, | |
1254 | "si1145_irq", | |
1255 | trig); | |
1256 | if (ret < 0) { | |
1257 | dev_err(&client->dev, "irq request failed\n"); | |
1258 | return ret; | |
1259 | } | |
1260 | ||
d3017f5f | 1261 | ret = devm_iio_trigger_register(&client->dev, trig); |
ac45e57f PMS |
1262 | if (ret) |
1263 | return ret; | |
1264 | ||
1265 | data->trig = trig; | |
1266 | indio_dev->trig = iio_trigger_get(data->trig); | |
1267 | ||
1268 | return 0; | |
1269 | } | |
1270 | ||
ac45e57f PMS |
1271 | static int si1145_probe(struct i2c_client *client, |
1272 | const struct i2c_device_id *id) | |
1273 | { | |
1274 | struct si1145_data *data; | |
1275 | struct iio_dev *indio_dev; | |
1276 | u8 part_id, rev_id, seq_id; | |
1277 | int ret; | |
1278 | ||
1279 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
1280 | if (!indio_dev) | |
1281 | return -ENOMEM; | |
1282 | ||
1283 | data = iio_priv(indio_dev); | |
1284 | i2c_set_clientdata(client, indio_dev); | |
1285 | data->client = client; | |
1286 | data->part_info = &si1145_part_info[id->driver_data]; | |
1287 | ||
1288 | part_id = ret = i2c_smbus_read_byte_data(data->client, | |
1289 | SI1145_REG_PART_ID); | |
1290 | if (ret < 0) | |
1291 | return ret; | |
1292 | rev_id = ret = i2c_smbus_read_byte_data(data->client, | |
1293 | SI1145_REG_REV_ID); | |
1294 | if (ret < 0) | |
1295 | return ret; | |
1296 | seq_id = ret = i2c_smbus_read_byte_data(data->client, | |
1297 | SI1145_REG_SEQ_ID); | |
1298 | if (ret < 0) | |
1299 | return ret; | |
1300 | dev_info(&client->dev, "device ID part %#02hhx rev %#02hhx seq %#02hhx\n", | |
1301 | part_id, rev_id, seq_id); | |
1302 | if (part_id != data->part_info->part) { | |
1303 | dev_err(&client->dev, "part ID mismatch got %#02hhx, expected %#02x\n", | |
1304 | part_id, data->part_info->part); | |
1305 | return -ENODEV; | |
1306 | } | |
1307 | ||
ac45e57f PMS |
1308 | indio_dev->name = id->name; |
1309 | indio_dev->channels = data->part_info->channels; | |
1310 | indio_dev->num_channels = data->part_info->num_channels; | |
1311 | indio_dev->info = data->part_info->iio_info; | |
1312 | indio_dev->modes = INDIO_DIRECT_MODE; | |
1313 | ||
1314 | mutex_init(&data->lock); | |
1315 | mutex_init(&data->cmdlock); | |
1316 | ||
1317 | ret = si1145_initialize(data); | |
1318 | if (ret < 0) | |
1319 | return ret; | |
1320 | ||
d3017f5f CY |
1321 | ret = devm_iio_triggered_buffer_setup(&client->dev, |
1322 | indio_dev, NULL, | |
ac45e57f PMS |
1323 | si1145_trigger_handler, &si1145_buffer_setup_ops); |
1324 | if (ret < 0) | |
1325 | return ret; | |
1326 | ||
1327 | if (client->irq) { | |
1328 | ret = si1145_probe_trigger(indio_dev); | |
1329 | if (ret < 0) | |
d3017f5f | 1330 | return ret; |
ac45e57f PMS |
1331 | } else { |
1332 | dev_info(&client->dev, "no irq, using polling\n"); | |
1333 | } | |
1334 | ||
d3017f5f | 1335 | return devm_iio_device_register(&client->dev, indio_dev); |
ac45e57f PMS |
1336 | } |
1337 | ||
1338 | static const struct i2c_device_id si1145_ids[] = { | |
1339 | { "si1132", SI1132 }, | |
1340 | { "si1141", SI1141 }, | |
1341 | { "si1142", SI1142 }, | |
1342 | { "si1143", SI1143 }, | |
1343 | { "si1145", SI1145 }, | |
1344 | { "si1146", SI1146 }, | |
1345 | { "si1147", SI1147 }, | |
1346 | { } | |
1347 | }; | |
1348 | MODULE_DEVICE_TABLE(i2c, si1145_ids); | |
1349 | ||
ac45e57f PMS |
1350 | static struct i2c_driver si1145_driver = { |
1351 | .driver = { | |
1352 | .name = "si1145", | |
1353 | }, | |
1354 | .probe = si1145_probe, | |
ac45e57f PMS |
1355 | .id_table = si1145_ids, |
1356 | }; | |
1357 | ||
1358 | module_i2c_driver(si1145_driver); | |
1359 | ||
1360 | MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>"); | |
1361 | MODULE_DESCRIPTION("Silabs SI1132 and SI1141/2/3/5/6/7 proximity, ambient light and UV index sensor driver"); | |
1362 | MODULE_LICENSE("GPL"); |