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ac45e57f PMS |
1 | /* |
2 | * si1145.c - Support for Silabs SI1132 and SI1141/2/3/5/6/7 combined ambient | |
3 | * light, UV index and proximity sensors | |
4 | * | |
5 | * Copyright 2014-16 Peter Meerwald-Stadler <pmeerw@pmeerw.net> | |
6 | * Copyright 2016 Crestez Dan Leonard <leonard.crestez@intel.com> | |
7 | * | |
8 | * This file is subject to the terms and conditions of version 2 of | |
9 | * the GNU General Public License. See the file COPYING in the main | |
10 | * directory of this archive for more details. | |
11 | * | |
12 | * SI1132 (7-bit I2C slave address 0x60) | |
13 | * SI1141/2/3 (7-bit I2C slave address 0x5a) | |
14 | * SI1145/6/6 (7-bit I2C slave address 0x60) | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/i2c.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/irq.h> | |
23 | #include <linux/gpio.h> | |
24 | ||
25 | #include <linux/iio/iio.h> | |
26 | #include <linux/iio/sysfs.h> | |
27 | #include <linux/iio/trigger.h> | |
28 | #include <linux/iio/trigger_consumer.h> | |
29 | #include <linux/iio/triggered_buffer.h> | |
30 | #include <linux/iio/buffer.h> | |
31 | #include <linux/util_macros.h> | |
32 | ||
33 | #define SI1145_REG_PART_ID 0x00 | |
34 | #define SI1145_REG_REV_ID 0x01 | |
35 | #define SI1145_REG_SEQ_ID 0x02 | |
36 | #define SI1145_REG_INT_CFG 0x03 | |
37 | #define SI1145_REG_IRQ_ENABLE 0x04 | |
38 | #define SI1145_REG_IRQ_MODE 0x05 | |
39 | #define SI1145_REG_HW_KEY 0x07 | |
40 | #define SI1145_REG_MEAS_RATE 0x08 | |
41 | #define SI1145_REG_PS_LED21 0x0f | |
42 | #define SI1145_REG_PS_LED3 0x10 | |
43 | #define SI1145_REG_UCOEF1 0x13 | |
44 | #define SI1145_REG_UCOEF2 0x14 | |
45 | #define SI1145_REG_UCOEF3 0x15 | |
46 | #define SI1145_REG_UCOEF4 0x16 | |
47 | #define SI1145_REG_PARAM_WR 0x17 | |
48 | #define SI1145_REG_COMMAND 0x18 | |
49 | #define SI1145_REG_RESPONSE 0x20 | |
50 | #define SI1145_REG_IRQ_STATUS 0x21 | |
51 | #define SI1145_REG_ALSVIS_DATA 0x22 | |
52 | #define SI1145_REG_ALSIR_DATA 0x24 | |
53 | #define SI1145_REG_PS1_DATA 0x26 | |
54 | #define SI1145_REG_PS2_DATA 0x28 | |
55 | #define SI1145_REG_PS3_DATA 0x2a | |
56 | #define SI1145_REG_AUX_DATA 0x2c | |
57 | #define SI1145_REG_PARAM_RD 0x2e | |
58 | #define SI1145_REG_CHIP_STAT 0x30 | |
59 | ||
60 | #define SI1145_UCOEF1_DEFAULT 0x7b | |
61 | #define SI1145_UCOEF2_DEFAULT 0x6b | |
62 | #define SI1145_UCOEF3_DEFAULT 0x01 | |
63 | #define SI1145_UCOEF4_DEFAULT 0x00 | |
64 | ||
65 | /* Helper to figure out PS_LED register / shift per channel */ | |
66 | #define SI1145_PS_LED_REG(ch) \ | |
67 | (((ch) == 2) ? SI1145_REG_PS_LED3 : SI1145_REG_PS_LED21) | |
68 | #define SI1145_PS_LED_SHIFT(ch) \ | |
69 | (((ch) == 1) ? 4 : 0) | |
70 | ||
71 | /* Parameter offsets */ | |
72 | #define SI1145_PARAM_CHLIST 0x01 | |
73 | #define SI1145_PARAM_PSLED12_SELECT 0x02 | |
74 | #define SI1145_PARAM_PSLED3_SELECT 0x03 | |
75 | #define SI1145_PARAM_PS_ENCODING 0x05 | |
76 | #define SI1145_PARAM_ALS_ENCODING 0x06 | |
77 | #define SI1145_PARAM_PS1_ADC_MUX 0x07 | |
78 | #define SI1145_PARAM_PS2_ADC_MUX 0x08 | |
79 | #define SI1145_PARAM_PS3_ADC_MUX 0x09 | |
80 | #define SI1145_PARAM_PS_ADC_COUNTER 0x0a | |
81 | #define SI1145_PARAM_PS_ADC_GAIN 0x0b | |
82 | #define SI1145_PARAM_PS_ADC_MISC 0x0c | |
83 | #define SI1145_PARAM_ALS_ADC_MUX 0x0d | |
84 | #define SI1145_PARAM_ALSIR_ADC_MUX 0x0e | |
85 | #define SI1145_PARAM_AUX_ADC_MUX 0x0f | |
86 | #define SI1145_PARAM_ALSVIS_ADC_COUNTER 0x10 | |
87 | #define SI1145_PARAM_ALSVIS_ADC_GAIN 0x11 | |
88 | #define SI1145_PARAM_ALSVIS_ADC_MISC 0x12 | |
89 | #define SI1145_PARAM_LED_RECOVERY 0x1c | |
90 | #define SI1145_PARAM_ALSIR_ADC_COUNTER 0x1d | |
91 | #define SI1145_PARAM_ALSIR_ADC_GAIN 0x1e | |
92 | #define SI1145_PARAM_ALSIR_ADC_MISC 0x1f | |
93 | #define SI1145_PARAM_ADC_OFFSET 0x1a | |
94 | ||
95 | /* Channel enable masks for CHLIST parameter */ | |
96 | #define SI1145_CHLIST_EN_PS1 BIT(0) | |
97 | #define SI1145_CHLIST_EN_PS2 BIT(1) | |
98 | #define SI1145_CHLIST_EN_PS3 BIT(2) | |
99 | #define SI1145_CHLIST_EN_ALSVIS BIT(4) | |
100 | #define SI1145_CHLIST_EN_ALSIR BIT(5) | |
101 | #define SI1145_CHLIST_EN_AUX BIT(6) | |
102 | #define SI1145_CHLIST_EN_UV BIT(7) | |
103 | ||
104 | /* Proximity measurement mode for ADC_MISC parameter */ | |
105 | #define SI1145_PS_ADC_MODE_NORMAL BIT(2) | |
106 | /* Signal range mask for ADC_MISC parameter */ | |
107 | #define SI1145_ADC_MISC_RANGE BIT(5) | |
108 | ||
109 | /* Commands for REG_COMMAND */ | |
110 | #define SI1145_CMD_NOP 0x00 | |
111 | #define SI1145_CMD_RESET 0x01 | |
112 | #define SI1145_CMD_PS_FORCE 0x05 | |
113 | #define SI1145_CMD_ALS_FORCE 0x06 | |
114 | #define SI1145_CMD_PSALS_FORCE 0x07 | |
115 | #define SI1145_CMD_PS_PAUSE 0x09 | |
116 | #define SI1145_CMD_ALS_PAUSE 0x0a | |
117 | #define SI1145_CMD_PSALS_PAUSE 0x0b | |
118 | #define SI1145_CMD_PS_AUTO 0x0d | |
119 | #define SI1145_CMD_ALS_AUTO 0x0e | |
120 | #define SI1145_CMD_PSALS_AUTO 0x0f | |
121 | #define SI1145_CMD_PARAM_QUERY 0x80 | |
122 | #define SI1145_CMD_PARAM_SET 0xa0 | |
123 | ||
124 | #define SI1145_RSP_INVALID_SETTING 0x80 | |
125 | #define SI1145_RSP_COUNTER_MASK 0x0F | |
126 | ||
127 | /* Minimum sleep after each command to ensure it's received */ | |
128 | #define SI1145_COMMAND_MINSLEEP_MS 5 | |
129 | /* Return -ETIMEDOUT after this long */ | |
130 | #define SI1145_COMMAND_TIMEOUT_MS 25 | |
131 | ||
132 | /* Interrupt configuration masks for INT_CFG register */ | |
133 | #define SI1145_INT_CFG_OE BIT(0) /* enable interrupt */ | |
134 | #define SI1145_INT_CFG_MODE BIT(1) /* auto reset interrupt pin */ | |
135 | ||
136 | /* Interrupt enable masks for IRQ_ENABLE register */ | |
137 | #define SI1145_MASK_ALL_IE (BIT(4) | BIT(3) | BIT(2) | BIT(0)) | |
138 | ||
139 | #define SI1145_MUX_TEMP 0x65 | |
140 | #define SI1145_MUX_VDD 0x75 | |
141 | ||
142 | /* Proximity LED current; see Table 2 in datasheet */ | |
143 | #define SI1145_LED_CURRENT_45mA 0x04 | |
144 | ||
145 | enum { | |
146 | SI1132, | |
147 | SI1141, | |
148 | SI1142, | |
149 | SI1143, | |
150 | SI1145, | |
151 | SI1146, | |
152 | SI1147, | |
153 | }; | |
154 | ||
155 | struct si1145_part_info { | |
156 | u8 part; | |
157 | const struct iio_info *iio_info; | |
158 | const struct iio_chan_spec *channels; | |
159 | unsigned int num_channels; | |
160 | unsigned int num_leds; | |
161 | bool uncompressed_meas_rate; | |
162 | }; | |
163 | ||
164 | /** | |
165 | * struct si1145_data - si1145 chip state data | |
166 | * @client: I2C client | |
167 | * @lock: mutex to protect shared state. | |
168 | * @cmdlock: Low-level mutex to protect command execution only | |
169 | * @rsp_seq: Next expected response number or -1 if counter reset required | |
170 | * @scan_mask: Saved scan mask to avoid duplicate set_chlist | |
171 | * @autonomous: If automatic measurements are active (for buffer support) | |
172 | * @part_info: Part information | |
173 | * @trig: Pointer to iio trigger | |
174 | * @meas_rate: Value of MEAS_RATE register. Only set in HW in auto mode | |
175 | */ | |
176 | struct si1145_data { | |
177 | struct i2c_client *client; | |
178 | struct mutex lock; | |
179 | struct mutex cmdlock; | |
180 | int rsp_seq; | |
181 | const struct si1145_part_info *part_info; | |
182 | unsigned long scan_mask; | |
183 | bool autonomous; | |
184 | struct iio_trigger *trig; | |
185 | int meas_rate; | |
186 | }; | |
187 | ||
188 | /** | |
189 | * __si1145_command_reset() - Send CMD_NOP and wait for response 0 | |
190 | * | |
191 | * Does not modify data->rsp_seq | |
192 | * | |
193 | * Return: 0 on success and -errno on error. | |
194 | */ | |
195 | static int __si1145_command_reset(struct si1145_data *data) | |
196 | { | |
197 | struct device *dev = &data->client->dev; | |
198 | unsigned long stop_jiffies; | |
199 | int ret; | |
200 | ||
201 | ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, | |
202 | SI1145_CMD_NOP); | |
203 | if (ret < 0) | |
204 | return ret; | |
205 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
206 | ||
207 | stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000; | |
208 | while (true) { | |
209 | ret = i2c_smbus_read_byte_data(data->client, | |
210 | SI1145_REG_RESPONSE); | |
211 | if (ret <= 0) | |
212 | return ret; | |
213 | if (time_after(jiffies, stop_jiffies)) { | |
214 | dev_warn(dev, "timeout on reset\n"); | |
215 | return -ETIMEDOUT; | |
216 | } | |
217 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
218 | continue; | |
219 | } | |
220 | } | |
221 | ||
222 | /** | |
223 | * si1145_command() - Execute a command and poll the response register | |
224 | * | |
225 | * All conversion overflows are reported as -EOVERFLOW | |
226 | * INVALID_SETTING is reported as -EINVAL | |
227 | * Timeouts are reported as -ETIMEDOUT | |
228 | * | |
229 | * Return: 0 on success or -errno on failure | |
230 | */ | |
231 | static int si1145_command(struct si1145_data *data, u8 cmd) | |
232 | { | |
233 | struct device *dev = &data->client->dev; | |
234 | unsigned long stop_jiffies; | |
235 | int ret; | |
236 | ||
237 | mutex_lock(&data->cmdlock); | |
238 | ||
239 | if (data->rsp_seq < 0) { | |
240 | ret = __si1145_command_reset(data); | |
241 | if (ret < 0) { | |
242 | dev_err(dev, "failed to reset command counter, ret=%d\n", | |
243 | ret); | |
244 | goto out; | |
245 | } | |
246 | data->rsp_seq = 0; | |
247 | } | |
248 | ||
249 | ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, cmd); | |
250 | if (ret) { | |
251 | dev_warn(dev, "failed to write command, ret=%d\n", ret); | |
252 | goto out; | |
253 | } | |
254 | /* Sleep a little to ensure the command is received */ | |
255 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
256 | ||
257 | stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000; | |
258 | while (true) { | |
259 | ret = i2c_smbus_read_byte_data(data->client, | |
260 | SI1145_REG_RESPONSE); | |
261 | if (ret < 0) { | |
262 | dev_warn(dev, "failed to read response, ret=%d\n", ret); | |
263 | break; | |
264 | } | |
265 | ||
266 | if ((ret & ~SI1145_RSP_COUNTER_MASK) == 0) { | |
267 | if (ret == data->rsp_seq) { | |
268 | if (time_after(jiffies, stop_jiffies)) { | |
269 | dev_warn(dev, "timeout on command %#02hhx\n", | |
270 | cmd); | |
271 | ret = -ETIMEDOUT; | |
272 | break; | |
273 | } | |
274 | msleep(SI1145_COMMAND_MINSLEEP_MS); | |
275 | continue; | |
276 | } | |
277 | if (ret == ((data->rsp_seq + 1) & | |
278 | SI1145_RSP_COUNTER_MASK)) { | |
279 | data->rsp_seq = ret; | |
280 | ret = 0; | |
281 | break; | |
282 | } | |
283 | dev_warn(dev, "unexpected response counter %d instead of %d\n", | |
284 | ret, (data->rsp_seq + 1) & | |
285 | SI1145_RSP_COUNTER_MASK); | |
286 | ret = -EIO; | |
287 | } else { | |
288 | if (ret == SI1145_RSP_INVALID_SETTING) { | |
289 | dev_warn(dev, "INVALID_SETTING error on command %#02hhx\n", | |
290 | cmd); | |
291 | ret = -EINVAL; | |
292 | } else { | |
293 | /* All overflows are treated identically */ | |
294 | dev_dbg(dev, "overflow, ret=%d, cmd=%#02hhx\n", | |
295 | ret, cmd); | |
296 | ret = -EOVERFLOW; | |
297 | } | |
298 | } | |
299 | ||
300 | /* Force a counter reset next time */ | |
301 | data->rsp_seq = -1; | |
302 | break; | |
303 | } | |
304 | ||
305 | out: | |
306 | mutex_unlock(&data->cmdlock); | |
307 | ||
308 | return ret; | |
309 | } | |
310 | ||
311 | static int si1145_param_update(struct si1145_data *data, u8 op, u8 param, | |
312 | u8 value) | |
313 | { | |
314 | int ret; | |
315 | ||
316 | ret = i2c_smbus_write_byte_data(data->client, | |
317 | SI1145_REG_PARAM_WR, value); | |
318 | if (ret < 0) | |
319 | return ret; | |
320 | ||
321 | return si1145_command(data, op | (param & 0x1F)); | |
322 | } | |
323 | ||
324 | static int si1145_param_set(struct si1145_data *data, u8 param, u8 value) | |
325 | { | |
326 | return si1145_param_update(data, SI1145_CMD_PARAM_SET, param, value); | |
327 | } | |
328 | ||
329 | /* Set param. Returns negative errno or current value */ | |
330 | static int si1145_param_query(struct si1145_data *data, u8 param) | |
331 | { | |
332 | int ret; | |
333 | ||
334 | ret = si1145_command(data, SI1145_CMD_PARAM_QUERY | (param & 0x1F)); | |
335 | if (ret < 0) | |
336 | return ret; | |
337 | ||
338 | return i2c_smbus_read_byte_data(data->client, SI1145_REG_PARAM_RD); | |
339 | } | |
340 | ||
341 | /* Expand 8 bit compressed value to 16 bit, see Silabs AN498 */ | |
342 | static u16 si1145_uncompress(u8 x) | |
343 | { | |
344 | u16 result = 0; | |
345 | u8 exponent = 0; | |
346 | ||
347 | if (x < 8) | |
348 | return 0; | |
349 | ||
350 | exponent = (x & 0xf0) >> 4; | |
351 | result = 0x10 | (x & 0x0f); | |
352 | ||
353 | if (exponent >= 4) | |
354 | return result << (exponent - 4); | |
355 | return result >> (4 - exponent); | |
356 | } | |
357 | ||
358 | /* Compress 16 bit value to 8 bit, see Silabs AN498 */ | |
359 | static u8 si1145_compress(u16 x) | |
360 | { | |
361 | u32 exponent = 0; | |
362 | u32 significand = 0; | |
363 | u32 tmp = x; | |
364 | ||
365 | if (x == 0x0000) | |
366 | return 0x00; | |
367 | if (x == 0x0001) | |
368 | return 0x08; | |
369 | ||
370 | while (1) { | |
371 | tmp >>= 1; | |
372 | exponent += 1; | |
373 | if (tmp == 1) | |
374 | break; | |
375 | } | |
376 | ||
377 | if (exponent < 5) { | |
378 | significand = x << (4 - exponent); | |
379 | return (exponent << 4) | (significand & 0xF); | |
380 | } | |
381 | ||
382 | significand = x >> (exponent - 5); | |
383 | if (significand & 1) { | |
384 | significand += 2; | |
385 | if (significand & 0x0040) { | |
386 | exponent += 1; | |
387 | significand >>= 1; | |
388 | } | |
389 | } | |
390 | ||
391 | return (exponent << 4) | ((significand >> 1) & 0xF); | |
392 | } | |
393 | ||
394 | /* Write meas_rate in hardware */ | |
395 | static int si1145_set_meas_rate(struct si1145_data *data, int interval) | |
396 | { | |
397 | if (data->part_info->uncompressed_meas_rate) | |
398 | return i2c_smbus_write_word_data(data->client, | |
399 | SI1145_REG_MEAS_RATE, interval); | |
400 | else | |
401 | return i2c_smbus_write_byte_data(data->client, | |
402 | SI1145_REG_MEAS_RATE, interval); | |
403 | } | |
404 | ||
405 | static int si1145_read_samp_freq(struct si1145_data *data, int *val, int *val2) | |
406 | { | |
407 | *val = 32000; | |
408 | if (data->part_info->uncompressed_meas_rate) | |
409 | *val2 = data->meas_rate; | |
410 | else | |
411 | *val2 = si1145_uncompress(data->meas_rate); | |
412 | return IIO_VAL_FRACTIONAL; | |
413 | } | |
414 | ||
415 | /* Set the samp freq in driver private data */ | |
416 | static int si1145_store_samp_freq(struct si1145_data *data, int val) | |
417 | { | |
418 | int ret = 0; | |
419 | int meas_rate; | |
420 | ||
421 | if (val <= 0 || val > 32000) | |
422 | return -ERANGE; | |
423 | meas_rate = 32000 / val; | |
424 | ||
425 | mutex_lock(&data->lock); | |
426 | if (data->autonomous) { | |
427 | ret = si1145_set_meas_rate(data, meas_rate); | |
428 | if (ret) | |
429 | goto out; | |
430 | } | |
431 | if (data->part_info->uncompressed_meas_rate) | |
432 | data->meas_rate = meas_rate; | |
433 | else | |
434 | data->meas_rate = si1145_compress(meas_rate); | |
435 | ||
436 | out: | |
437 | mutex_unlock(&data->lock); | |
438 | ||
439 | return ret; | |
440 | } | |
441 | ||
442 | static irqreturn_t si1145_trigger_handler(int irq, void *private) | |
443 | { | |
444 | struct iio_poll_func *pf = private; | |
445 | struct iio_dev *indio_dev = pf->indio_dev; | |
446 | struct si1145_data *data = iio_priv(indio_dev); | |
447 | /* | |
448 | * Maximum buffer size: | |
449 | * 6*2 bytes channels data + 4 bytes alignment + | |
450 | * 8 bytes timestamp | |
451 | */ | |
452 | u8 buffer[24]; | |
453 | int i, j = 0; | |
454 | int ret; | |
455 | u8 irq_status = 0; | |
456 | ||
457 | if (!data->autonomous) { | |
458 | ret = si1145_command(data, SI1145_CMD_PSALS_FORCE); | |
459 | if (ret < 0 && ret != -EOVERFLOW) | |
460 | goto done; | |
461 | } else { | |
462 | irq_status = ret = i2c_smbus_read_byte_data(data->client, | |
463 | SI1145_REG_IRQ_STATUS); | |
464 | if (ret < 0) | |
465 | goto done; | |
466 | if (!(irq_status & SI1145_MASK_ALL_IE)) | |
467 | goto done; | |
468 | } | |
469 | ||
470 | for_each_set_bit(i, indio_dev->active_scan_mask, | |
471 | indio_dev->masklength) { | |
472 | int run = 1; | |
473 | ||
474 | while (i + run < indio_dev->masklength) { | |
475 | if (!test_bit(i + run, indio_dev->active_scan_mask)) | |
476 | break; | |
477 | if (indio_dev->channels[i + run].address != | |
478 | indio_dev->channels[i].address + 2 * run) | |
479 | break; | |
480 | run++; | |
481 | } | |
482 | ||
483 | ret = i2c_smbus_read_i2c_block_data_or_emulated( | |
484 | data->client, indio_dev->channels[i].address, | |
485 | sizeof(u16) * run, &buffer[j]); | |
486 | if (ret < 0) | |
487 | goto done; | |
488 | j += run * sizeof(u16); | |
489 | i += run - 1; | |
490 | } | |
491 | ||
492 | if (data->autonomous) { | |
493 | ret = i2c_smbus_write_byte_data(data->client, | |
494 | SI1145_REG_IRQ_STATUS, | |
495 | irq_status & SI1145_MASK_ALL_IE); | |
496 | if (ret < 0) | |
497 | goto done; | |
498 | } | |
499 | ||
500 | iio_push_to_buffers_with_timestamp(indio_dev, buffer, | |
501 | iio_get_time_ns(indio_dev)); | |
502 | ||
503 | done: | |
504 | iio_trigger_notify_done(indio_dev->trig); | |
505 | return IRQ_HANDLED; | |
506 | } | |
507 | ||
508 | static int si1145_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask) | |
509 | { | |
510 | struct si1145_data *data = iio_priv(indio_dev); | |
511 | u8 reg = 0, mux; | |
512 | int ret; | |
513 | int i; | |
514 | ||
515 | /* channel list already set, no need to reprogram */ | |
516 | if (data->scan_mask == scan_mask) | |
517 | return 0; | |
518 | ||
519 | for_each_set_bit(i, &scan_mask, indio_dev->masklength) { | |
520 | switch (indio_dev->channels[i].address) { | |
521 | case SI1145_REG_ALSVIS_DATA: | |
522 | reg |= SI1145_CHLIST_EN_ALSVIS; | |
523 | break; | |
524 | case SI1145_REG_ALSIR_DATA: | |
525 | reg |= SI1145_CHLIST_EN_ALSIR; | |
526 | break; | |
527 | case SI1145_REG_PS1_DATA: | |
528 | reg |= SI1145_CHLIST_EN_PS1; | |
529 | break; | |
530 | case SI1145_REG_PS2_DATA: | |
531 | reg |= SI1145_CHLIST_EN_PS2; | |
532 | break; | |
533 | case SI1145_REG_PS3_DATA: | |
534 | reg |= SI1145_CHLIST_EN_PS3; | |
535 | break; | |
536 | case SI1145_REG_AUX_DATA: | |
537 | switch (indio_dev->channels[i].type) { | |
538 | case IIO_UVINDEX: | |
539 | reg |= SI1145_CHLIST_EN_UV; | |
540 | break; | |
541 | default: | |
542 | reg |= SI1145_CHLIST_EN_AUX; | |
543 | if (indio_dev->channels[i].type == IIO_TEMP) | |
544 | mux = SI1145_MUX_TEMP; | |
545 | else | |
546 | mux = SI1145_MUX_VDD; | |
547 | ret = si1145_param_set(data, | |
548 | SI1145_PARAM_AUX_ADC_MUX, mux); | |
549 | if (ret < 0) | |
550 | return ret; | |
551 | ||
552 | break; | |
553 | } | |
554 | } | |
555 | } | |
556 | ||
557 | data->scan_mask = scan_mask; | |
558 | ret = si1145_param_set(data, SI1145_PARAM_CHLIST, reg); | |
559 | ||
560 | return ret < 0 ? ret : 0; | |
561 | } | |
562 | ||
563 | static int si1145_measure(struct iio_dev *indio_dev, | |
564 | struct iio_chan_spec const *chan) | |
565 | { | |
566 | struct si1145_data *data = iio_priv(indio_dev); | |
567 | u8 cmd; | |
568 | int ret; | |
569 | ||
570 | ret = si1145_set_chlist(indio_dev, BIT(chan->scan_index)); | |
571 | if (ret < 0) | |
572 | return ret; | |
573 | ||
574 | cmd = (chan->type == IIO_PROXIMITY) ? SI1145_CMD_PS_FORCE : | |
575 | SI1145_CMD_ALS_FORCE; | |
576 | ret = si1145_command(data, cmd); | |
577 | if (ret < 0 && ret != -EOVERFLOW) | |
578 | return ret; | |
579 | ||
580 | return i2c_smbus_read_word_data(data->client, chan->address); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Conversion between iio scale and ADC_GAIN values | |
585 | * These could be further adjusted but proximity/intensity are dimensionless | |
586 | */ | |
587 | static const int si1145_proximity_scale_available[] = { | |
588 | 128, 64, 32, 16, 8, 4}; | |
589 | static const int si1145_intensity_scale_available[] = { | |
590 | 128, 64, 32, 16, 8, 4, 2, 1}; | |
591 | static IIO_CONST_ATTR(in_proximity_scale_available, | |
592 | "128 64 32 16 8 4"); | |
593 | static IIO_CONST_ATTR(in_intensity_scale_available, | |
594 | "128 64 32 16 8 4 2 1"); | |
595 | static IIO_CONST_ATTR(in_intensity_ir_scale_available, | |
596 | "128 64 32 16 8 4 2 1"); | |
597 | ||
598 | static int si1145_scale_from_adcgain(int regval) | |
599 | { | |
600 | return 128 >> regval; | |
601 | } | |
602 | ||
603 | static int si1145_proximity_adcgain_from_scale(int val, int val2) | |
604 | { | |
605 | val = find_closest_descending(val, si1145_proximity_scale_available, | |
606 | ARRAY_SIZE(si1145_proximity_scale_available)); | |
607 | if (val < 0 || val > 5 || val2 != 0) | |
608 | return -EINVAL; | |
609 | ||
610 | return val; | |
611 | } | |
612 | ||
613 | static int si1145_intensity_adcgain_from_scale(int val, int val2) | |
614 | { | |
615 | val = find_closest_descending(val, si1145_intensity_scale_available, | |
616 | ARRAY_SIZE(si1145_intensity_scale_available)); | |
617 | if (val < 0 || val > 7 || val2 != 0) | |
618 | return -EINVAL; | |
619 | ||
620 | return val; | |
621 | } | |
622 | ||
623 | static int si1145_read_raw(struct iio_dev *indio_dev, | |
624 | struct iio_chan_spec const *chan, | |
625 | int *val, int *val2, long mask) | |
626 | { | |
627 | struct si1145_data *data = iio_priv(indio_dev); | |
628 | int ret; | |
629 | u8 reg; | |
630 | ||
631 | switch (mask) { | |
632 | case IIO_CHAN_INFO_RAW: | |
633 | switch (chan->type) { | |
634 | case IIO_INTENSITY: | |
635 | case IIO_PROXIMITY: | |
636 | case IIO_VOLTAGE: | |
637 | case IIO_TEMP: | |
638 | case IIO_UVINDEX: | |
639 | ret = iio_device_claim_direct_mode(indio_dev); | |
640 | if (ret) | |
641 | return ret; | |
642 | ret = si1145_measure(indio_dev, chan); | |
643 | iio_device_release_direct_mode(indio_dev); | |
644 | ||
645 | if (ret < 0) | |
646 | return ret; | |
647 | ||
648 | *val = ret; | |
649 | ||
650 | return IIO_VAL_INT; | |
651 | case IIO_CURRENT: | |
652 | ret = i2c_smbus_read_byte_data(data->client, | |
653 | SI1145_PS_LED_REG(chan->channel)); | |
654 | if (ret < 0) | |
655 | return ret; | |
656 | ||
657 | *val = (ret >> SI1145_PS_LED_SHIFT(chan->channel)) | |
658 | & 0x0f; | |
659 | ||
660 | return IIO_VAL_INT; | |
661 | default: | |
662 | return -EINVAL; | |
663 | } | |
664 | case IIO_CHAN_INFO_SCALE: | |
665 | switch (chan->type) { | |
666 | case IIO_PROXIMITY: | |
667 | reg = SI1145_PARAM_PS_ADC_GAIN; | |
668 | break; | |
669 | case IIO_INTENSITY: | |
670 | if (chan->channel2 == IIO_MOD_LIGHT_IR) | |
671 | reg = SI1145_PARAM_ALSIR_ADC_GAIN; | |
672 | else | |
673 | reg = SI1145_PARAM_ALSVIS_ADC_GAIN; | |
674 | break; | |
675 | case IIO_TEMP: | |
676 | *val = 28; | |
677 | *val2 = 571429; | |
678 | return IIO_VAL_INT_PLUS_MICRO; | |
679 | case IIO_UVINDEX: | |
680 | *val = 0; | |
681 | *val2 = 10000; | |
682 | return IIO_VAL_INT_PLUS_MICRO; | |
683 | default: | |
684 | return -EINVAL; | |
685 | } | |
686 | ||
687 | ret = si1145_param_query(data, reg); | |
688 | if (ret < 0) | |
689 | return ret; | |
690 | ||
691 | *val = si1145_scale_from_adcgain(ret & 0x07); | |
692 | ||
693 | return IIO_VAL_INT; | |
694 | case IIO_CHAN_INFO_OFFSET: | |
695 | switch (chan->type) { | |
696 | case IIO_TEMP: | |
697 | /* | |
698 | * -ADC offset - ADC counts @ 25°C - | |
699 | * 35 * ADC counts / °C | |
700 | */ | |
701 | *val = -256 - 11136 + 25 * 35; | |
702 | return IIO_VAL_INT; | |
703 | default: | |
704 | /* | |
705 | * All ADC measurements have are by default offset | |
706 | * by -256 | |
707 | * See AN498 5.6.3 | |
708 | */ | |
709 | ret = si1145_param_query(data, SI1145_PARAM_ADC_OFFSET); | |
710 | if (ret < 0) | |
711 | return ret; | |
712 | *val = -si1145_uncompress(ret); | |
713 | return IIO_VAL_INT; | |
714 | } | |
715 | case IIO_CHAN_INFO_SAMP_FREQ: | |
716 | return si1145_read_samp_freq(data, val, val2); | |
717 | default: | |
718 | return -EINVAL; | |
719 | } | |
720 | } | |
721 | ||
722 | static int si1145_write_raw(struct iio_dev *indio_dev, | |
723 | struct iio_chan_spec const *chan, | |
724 | int val, int val2, long mask) | |
725 | { | |
726 | struct si1145_data *data = iio_priv(indio_dev); | |
727 | u8 reg1, reg2, shift; | |
728 | int ret; | |
729 | ||
730 | switch (mask) { | |
731 | case IIO_CHAN_INFO_SCALE: | |
732 | switch (chan->type) { | |
733 | case IIO_PROXIMITY: | |
734 | val = si1145_proximity_adcgain_from_scale(val, val2); | |
735 | if (val < 0) | |
736 | return val; | |
737 | reg1 = SI1145_PARAM_PS_ADC_GAIN; | |
738 | reg2 = SI1145_PARAM_PS_ADC_COUNTER; | |
739 | break; | |
740 | case IIO_INTENSITY: | |
741 | val = si1145_intensity_adcgain_from_scale(val, val2); | |
742 | if (val < 0) | |
743 | return val; | |
744 | if (chan->channel2 == IIO_MOD_LIGHT_IR) { | |
745 | reg1 = SI1145_PARAM_ALSIR_ADC_GAIN; | |
746 | reg2 = SI1145_PARAM_ALSIR_ADC_COUNTER; | |
747 | } else { | |
748 | reg1 = SI1145_PARAM_ALSVIS_ADC_GAIN; | |
749 | reg2 = SI1145_PARAM_ALSVIS_ADC_COUNTER; | |
750 | } | |
751 | break; | |
752 | default: | |
753 | return -EINVAL; | |
754 | } | |
755 | ||
756 | ret = iio_device_claim_direct_mode(indio_dev); | |
757 | if (ret) | |
758 | return ret; | |
759 | ||
760 | ret = si1145_param_set(data, reg1, val); | |
761 | if (ret < 0) { | |
762 | iio_device_release_direct_mode(indio_dev); | |
763 | return ret; | |
764 | } | |
765 | /* Set recovery period to one's complement of gain */ | |
766 | ret = si1145_param_set(data, reg2, (~val & 0x07) << 4); | |
767 | iio_device_release_direct_mode(indio_dev); | |
768 | return ret; | |
769 | case IIO_CHAN_INFO_RAW: | |
770 | if (chan->type != IIO_CURRENT) | |
771 | return -EINVAL; | |
772 | ||
773 | if (val < 0 || val > 15 || val2 != 0) | |
774 | return -EINVAL; | |
775 | ||
776 | reg1 = SI1145_PS_LED_REG(chan->channel); | |
777 | shift = SI1145_PS_LED_SHIFT(chan->channel); | |
778 | ||
779 | ret = iio_device_claim_direct_mode(indio_dev); | |
780 | if (ret) | |
781 | return ret; | |
782 | ||
783 | ret = i2c_smbus_read_byte_data(data->client, reg1); | |
784 | if (ret < 0) { | |
785 | iio_device_release_direct_mode(indio_dev); | |
786 | return ret; | |
787 | } | |
788 | ret = i2c_smbus_write_byte_data(data->client, reg1, | |
789 | (ret & ~(0x0f << shift)) | | |
790 | ((val & 0x0f) << shift)); | |
791 | iio_device_release_direct_mode(indio_dev); | |
792 | return ret; | |
793 | case IIO_CHAN_INFO_SAMP_FREQ: | |
794 | return si1145_store_samp_freq(data, val); | |
795 | default: | |
796 | return -EINVAL; | |
797 | } | |
798 | } | |
799 | ||
800 | #define SI1145_ST { \ | |
801 | .sign = 'u', \ | |
802 | .realbits = 16, \ | |
803 | .storagebits = 16, \ | |
804 | .endianness = IIO_LE, \ | |
805 | } | |
806 | ||
807 | #define SI1145_INTENSITY_CHANNEL(_si) { \ | |
808 | .type = IIO_INTENSITY, \ | |
809 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
810 | BIT(IIO_CHAN_INFO_OFFSET) | \ | |
811 | BIT(IIO_CHAN_INFO_SCALE), \ | |
812 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
813 | .scan_type = SI1145_ST, \ | |
814 | .scan_index = _si, \ | |
815 | .address = SI1145_REG_ALSVIS_DATA, \ | |
816 | } | |
817 | ||
818 | #define SI1145_INTENSITY_IR_CHANNEL(_si) { \ | |
819 | .type = IIO_INTENSITY, \ | |
820 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
821 | BIT(IIO_CHAN_INFO_OFFSET) | \ | |
822 | BIT(IIO_CHAN_INFO_SCALE), \ | |
823 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
824 | .modified = 1, \ | |
825 | .channel2 = IIO_MOD_LIGHT_IR, \ | |
826 | .scan_type = SI1145_ST, \ | |
827 | .scan_index = _si, \ | |
828 | .address = SI1145_REG_ALSIR_DATA, \ | |
829 | } | |
830 | ||
831 | #define SI1145_TEMP_CHANNEL(_si) { \ | |
832 | .type = IIO_TEMP, \ | |
833 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
834 | BIT(IIO_CHAN_INFO_OFFSET) | \ | |
835 | BIT(IIO_CHAN_INFO_SCALE), \ | |
836 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
837 | .scan_type = SI1145_ST, \ | |
838 | .scan_index = _si, \ | |
839 | .address = SI1145_REG_AUX_DATA, \ | |
840 | } | |
841 | ||
842 | #define SI1145_UV_CHANNEL(_si) { \ | |
843 | .type = IIO_UVINDEX, \ | |
844 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ | |
845 | BIT(IIO_CHAN_INFO_SCALE), \ | |
846 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
847 | .scan_type = SI1145_ST, \ | |
848 | .scan_index = _si, \ | |
849 | .address = SI1145_REG_AUX_DATA, \ | |
850 | } | |
851 | ||
852 | #define SI1145_PROXIMITY_CHANNEL(_si, _ch) { \ | |
853 | .type = IIO_PROXIMITY, \ | |
854 | .indexed = 1, \ | |
855 | .channel = _ch, \ | |
856 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
857 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ | |
858 | BIT(IIO_CHAN_INFO_OFFSET), \ | |
859 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
860 | .scan_type = SI1145_ST, \ | |
861 | .scan_index = _si, \ | |
862 | .address = SI1145_REG_PS1_DATA + _ch * 2, \ | |
863 | } | |
864 | ||
865 | #define SI1145_VOLTAGE_CHANNEL(_si) { \ | |
866 | .type = IIO_VOLTAGE, \ | |
867 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
868 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
869 | .scan_type = SI1145_ST, \ | |
870 | .scan_index = _si, \ | |
871 | .address = SI1145_REG_AUX_DATA, \ | |
872 | } | |
873 | ||
874 | #define SI1145_CURRENT_CHANNEL(_ch) { \ | |
875 | .type = IIO_CURRENT, \ | |
876 | .indexed = 1, \ | |
877 | .channel = _ch, \ | |
878 | .output = 1, \ | |
879 | .scan_index = -1, \ | |
880 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
881 | } | |
882 | ||
883 | static const struct iio_chan_spec si1132_channels[] = { | |
884 | SI1145_INTENSITY_CHANNEL(0), | |
885 | SI1145_INTENSITY_IR_CHANNEL(1), | |
886 | SI1145_TEMP_CHANNEL(2), | |
887 | SI1145_VOLTAGE_CHANNEL(3), | |
888 | SI1145_UV_CHANNEL(4), | |
889 | IIO_CHAN_SOFT_TIMESTAMP(6), | |
890 | }; | |
891 | ||
892 | static const struct iio_chan_spec si1141_channels[] = { | |
893 | SI1145_INTENSITY_CHANNEL(0), | |
894 | SI1145_INTENSITY_IR_CHANNEL(1), | |
895 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
896 | SI1145_TEMP_CHANNEL(3), | |
897 | SI1145_VOLTAGE_CHANNEL(4), | |
898 | IIO_CHAN_SOFT_TIMESTAMP(5), | |
899 | SI1145_CURRENT_CHANNEL(0), | |
900 | }; | |
901 | ||
902 | static const struct iio_chan_spec si1142_channels[] = { | |
903 | SI1145_INTENSITY_CHANNEL(0), | |
904 | SI1145_INTENSITY_IR_CHANNEL(1), | |
905 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
906 | SI1145_PROXIMITY_CHANNEL(3, 1), | |
907 | SI1145_TEMP_CHANNEL(4), | |
908 | SI1145_VOLTAGE_CHANNEL(5), | |
909 | IIO_CHAN_SOFT_TIMESTAMP(6), | |
910 | SI1145_CURRENT_CHANNEL(0), | |
911 | SI1145_CURRENT_CHANNEL(1), | |
912 | }; | |
913 | ||
914 | static const struct iio_chan_spec si1143_channels[] = { | |
915 | SI1145_INTENSITY_CHANNEL(0), | |
916 | SI1145_INTENSITY_IR_CHANNEL(1), | |
917 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
918 | SI1145_PROXIMITY_CHANNEL(3, 1), | |
919 | SI1145_PROXIMITY_CHANNEL(4, 2), | |
920 | SI1145_TEMP_CHANNEL(5), | |
921 | SI1145_VOLTAGE_CHANNEL(6), | |
922 | IIO_CHAN_SOFT_TIMESTAMP(7), | |
923 | SI1145_CURRENT_CHANNEL(0), | |
924 | SI1145_CURRENT_CHANNEL(1), | |
925 | SI1145_CURRENT_CHANNEL(2), | |
926 | }; | |
927 | ||
928 | static const struct iio_chan_spec si1145_channels[] = { | |
929 | SI1145_INTENSITY_CHANNEL(0), | |
930 | SI1145_INTENSITY_IR_CHANNEL(1), | |
931 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
932 | SI1145_TEMP_CHANNEL(3), | |
933 | SI1145_VOLTAGE_CHANNEL(4), | |
934 | SI1145_UV_CHANNEL(5), | |
935 | IIO_CHAN_SOFT_TIMESTAMP(6), | |
936 | SI1145_CURRENT_CHANNEL(0), | |
937 | }; | |
938 | ||
939 | static const struct iio_chan_spec si1146_channels[] = { | |
940 | SI1145_INTENSITY_CHANNEL(0), | |
941 | SI1145_INTENSITY_IR_CHANNEL(1), | |
942 | SI1145_TEMP_CHANNEL(2), | |
943 | SI1145_VOLTAGE_CHANNEL(3), | |
944 | SI1145_UV_CHANNEL(4), | |
945 | SI1145_PROXIMITY_CHANNEL(5, 0), | |
946 | SI1145_PROXIMITY_CHANNEL(6, 1), | |
947 | IIO_CHAN_SOFT_TIMESTAMP(7), | |
948 | SI1145_CURRENT_CHANNEL(0), | |
949 | SI1145_CURRENT_CHANNEL(1), | |
950 | }; | |
951 | ||
952 | static const struct iio_chan_spec si1147_channels[] = { | |
953 | SI1145_INTENSITY_CHANNEL(0), | |
954 | SI1145_INTENSITY_IR_CHANNEL(1), | |
955 | SI1145_PROXIMITY_CHANNEL(2, 0), | |
956 | SI1145_PROXIMITY_CHANNEL(3, 1), | |
957 | SI1145_PROXIMITY_CHANNEL(4, 2), | |
958 | SI1145_TEMP_CHANNEL(5), | |
959 | SI1145_VOLTAGE_CHANNEL(6), | |
960 | SI1145_UV_CHANNEL(7), | |
961 | IIO_CHAN_SOFT_TIMESTAMP(8), | |
962 | SI1145_CURRENT_CHANNEL(0), | |
963 | SI1145_CURRENT_CHANNEL(1), | |
964 | SI1145_CURRENT_CHANNEL(2), | |
965 | }; | |
966 | ||
967 | static struct attribute *si1132_attributes[] = { | |
968 | &iio_const_attr_in_intensity_scale_available.dev_attr.attr, | |
969 | &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr, | |
970 | NULL, | |
971 | }; | |
972 | ||
973 | static struct attribute *si114x_attributes[] = { | |
974 | &iio_const_attr_in_intensity_scale_available.dev_attr.attr, | |
975 | &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr, | |
976 | &iio_const_attr_in_proximity_scale_available.dev_attr.attr, | |
977 | NULL, | |
978 | }; | |
979 | ||
980 | static const struct attribute_group si1132_attribute_group = { | |
981 | .attrs = si1132_attributes, | |
982 | }; | |
983 | ||
984 | static const struct attribute_group si114x_attribute_group = { | |
985 | .attrs = si114x_attributes, | |
986 | }; | |
987 | ||
988 | ||
989 | static const struct iio_info si1132_info = { | |
990 | .read_raw = si1145_read_raw, | |
991 | .write_raw = si1145_write_raw, | |
ac45e57f PMS |
992 | .attrs = &si1132_attribute_group, |
993 | }; | |
994 | ||
995 | static const struct iio_info si114x_info = { | |
996 | .read_raw = si1145_read_raw, | |
997 | .write_raw = si1145_write_raw, | |
ac45e57f PMS |
998 | .attrs = &si114x_attribute_group, |
999 | }; | |
1000 | ||
1001 | #define SI1145_PART(id, iio_info, chans, leds, uncompressed_meas_rate) \ | |
1002 | {id, iio_info, chans, ARRAY_SIZE(chans), leds, uncompressed_meas_rate} | |
1003 | ||
1004 | static const struct si1145_part_info si1145_part_info[] = { | |
1005 | [SI1132] = SI1145_PART(0x32, &si1132_info, si1132_channels, 0, true), | |
1006 | [SI1141] = SI1145_PART(0x41, &si114x_info, si1141_channels, 1, false), | |
1007 | [SI1142] = SI1145_PART(0x42, &si114x_info, si1142_channels, 2, false), | |
1008 | [SI1143] = SI1145_PART(0x43, &si114x_info, si1143_channels, 3, false), | |
1009 | [SI1145] = SI1145_PART(0x45, &si114x_info, si1145_channels, 1, true), | |
1010 | [SI1146] = SI1145_PART(0x46, &si114x_info, si1146_channels, 2, true), | |
1011 | [SI1147] = SI1145_PART(0x47, &si114x_info, si1147_channels, 3, true), | |
1012 | }; | |
1013 | ||
1014 | static int si1145_initialize(struct si1145_data *data) | |
1015 | { | |
1016 | struct i2c_client *client = data->client; | |
1017 | int ret; | |
1018 | ||
1019 | ret = i2c_smbus_write_byte_data(client, SI1145_REG_COMMAND, | |
1020 | SI1145_CMD_RESET); | |
1021 | if (ret < 0) | |
1022 | return ret; | |
1023 | msleep(SI1145_COMMAND_TIMEOUT_MS); | |
1024 | ||
1025 | /* Hardware key, magic value */ | |
1026 | ret = i2c_smbus_write_byte_data(client, SI1145_REG_HW_KEY, 0x17); | |
1027 | if (ret < 0) | |
1028 | return ret; | |
1029 | msleep(SI1145_COMMAND_TIMEOUT_MS); | |
1030 | ||
1031 | /* Turn off autonomous mode */ | |
1032 | ret = si1145_set_meas_rate(data, 0); | |
1033 | if (ret < 0) | |
1034 | return ret; | |
1035 | ||
1036 | /* Initialize sampling freq to 10 Hz */ | |
1037 | ret = si1145_store_samp_freq(data, 10); | |
1038 | if (ret < 0) | |
1039 | return ret; | |
1040 | ||
1041 | /* Set LED currents to 45 mA; have 4 bits, see Table 2 in datasheet */ | |
1042 | switch (data->part_info->num_leds) { | |
1043 | case 3: | |
1044 | ret = i2c_smbus_write_byte_data(client, | |
1045 | SI1145_REG_PS_LED3, | |
1046 | SI1145_LED_CURRENT_45mA); | |
1047 | if (ret < 0) | |
1048 | return ret; | |
1049 | /* fallthrough */ | |
1050 | case 2: | |
1051 | ret = i2c_smbus_write_byte_data(client, | |
1052 | SI1145_REG_PS_LED21, | |
1053 | (SI1145_LED_CURRENT_45mA << 4) | | |
1054 | SI1145_LED_CURRENT_45mA); | |
1055 | break; | |
1056 | case 1: | |
1057 | ret = i2c_smbus_write_byte_data(client, | |
1058 | SI1145_REG_PS_LED21, | |
1059 | SI1145_LED_CURRENT_45mA); | |
1060 | break; | |
1061 | default: | |
1062 | ret = 0; | |
1063 | break; | |
1064 | } | |
1065 | if (ret < 0) | |
1066 | return ret; | |
1067 | ||
1068 | /* Set normal proximity measurement mode */ | |
1069 | ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_MISC, | |
1070 | SI1145_PS_ADC_MODE_NORMAL); | |
1071 | if (ret < 0) | |
1072 | return ret; | |
1073 | ||
1074 | ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_GAIN, 0x01); | |
1075 | if (ret < 0) | |
1076 | return ret; | |
1077 | ||
1078 | /* ADC_COUNTER should be one complement of ADC_GAIN */ | |
1079 | ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_COUNTER, 0x06 << 4); | |
1080 | if (ret < 0) | |
1081 | return ret; | |
1082 | ||
1083 | /* Set ALS visible measurement mode */ | |
1084 | ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_MISC, | |
1085 | SI1145_ADC_MISC_RANGE); | |
1086 | if (ret < 0) | |
1087 | return ret; | |
1088 | ||
1089 | ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_GAIN, 0x03); | |
1090 | if (ret < 0) | |
1091 | return ret; | |
1092 | ||
1093 | ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_COUNTER, | |
1094 | 0x04 << 4); | |
1095 | if (ret < 0) | |
1096 | return ret; | |
1097 | ||
1098 | /* Set ALS IR measurement mode */ | |
1099 | ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_MISC, | |
1100 | SI1145_ADC_MISC_RANGE); | |
1101 | if (ret < 0) | |
1102 | return ret; | |
1103 | ||
1104 | ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_GAIN, 0x01); | |
1105 | if (ret < 0) | |
1106 | return ret; | |
1107 | ||
1108 | ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_COUNTER, | |
1109 | 0x06 << 4); | |
1110 | if (ret < 0) | |
1111 | return ret; | |
1112 | ||
1113 | /* | |
1114 | * Initialize UCOEF to default values in datasheet | |
1115 | * These registers are normally zero on reset | |
1116 | */ | |
1117 | if (data->part_info == &si1145_part_info[SI1132] || | |
1118 | data->part_info == &si1145_part_info[SI1145] || | |
1119 | data->part_info == &si1145_part_info[SI1146] || | |
1120 | data->part_info == &si1145_part_info[SI1147]) { | |
1121 | ret = i2c_smbus_write_byte_data(data->client, | |
1122 | SI1145_REG_UCOEF1, | |
1123 | SI1145_UCOEF1_DEFAULT); | |
1124 | if (ret < 0) | |
1125 | return ret; | |
1126 | ret = i2c_smbus_write_byte_data(data->client, | |
1127 | SI1145_REG_UCOEF2, SI1145_UCOEF2_DEFAULT); | |
1128 | if (ret < 0) | |
1129 | return ret; | |
1130 | ret = i2c_smbus_write_byte_data(data->client, | |
1131 | SI1145_REG_UCOEF3, SI1145_UCOEF3_DEFAULT); | |
1132 | if (ret < 0) | |
1133 | return ret; | |
1134 | ret = i2c_smbus_write_byte_data(data->client, | |
1135 | SI1145_REG_UCOEF4, SI1145_UCOEF4_DEFAULT); | |
1136 | if (ret < 0) | |
1137 | return ret; | |
1138 | } | |
1139 | ||
1140 | return 0; | |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * Program the channels we want to measure with CMD_PSALS_AUTO. No need for | |
1145 | * _postdisable as we stop with CMD_PSALS_PAUSE; single measurement (direct) | |
1146 | * mode reprograms the channels list anyway... | |
1147 | */ | |
1148 | static int si1145_buffer_preenable(struct iio_dev *indio_dev) | |
1149 | { | |
1150 | struct si1145_data *data = iio_priv(indio_dev); | |
1151 | int ret; | |
1152 | ||
1153 | mutex_lock(&data->lock); | |
1154 | ret = si1145_set_chlist(indio_dev, *indio_dev->active_scan_mask); | |
1155 | mutex_unlock(&data->lock); | |
1156 | ||
1157 | return ret; | |
1158 | } | |
1159 | ||
1160 | static bool si1145_validate_scan_mask(struct iio_dev *indio_dev, | |
1161 | const unsigned long *scan_mask) | |
1162 | { | |
1163 | struct si1145_data *data = iio_priv(indio_dev); | |
1164 | unsigned int count = 0; | |
1165 | int i; | |
1166 | ||
1167 | /* Check that at most one AUX channel is enabled */ | |
1168 | for_each_set_bit(i, scan_mask, data->part_info->num_channels) { | |
1169 | if (indio_dev->channels[i].address == SI1145_REG_AUX_DATA) | |
1170 | count++; | |
1171 | } | |
1172 | ||
1173 | return count <= 1; | |
1174 | } | |
1175 | ||
1176 | static const struct iio_buffer_setup_ops si1145_buffer_setup_ops = { | |
1177 | .preenable = si1145_buffer_preenable, | |
1178 | .postenable = iio_triggered_buffer_postenable, | |
1179 | .predisable = iio_triggered_buffer_predisable, | |
1180 | .validate_scan_mask = si1145_validate_scan_mask, | |
1181 | }; | |
1182 | ||
1183 | /** | |
1184 | * si1145_trigger_set_state() - Set trigger state | |
1185 | * | |
1186 | * When not using triggers interrupts are disabled and measurement rate is | |
1187 | * set to zero in order to minimize power consumption. | |
1188 | */ | |
1189 | static int si1145_trigger_set_state(struct iio_trigger *trig, bool state) | |
1190 | { | |
1191 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); | |
1192 | struct si1145_data *data = iio_priv(indio_dev); | |
1193 | int err = 0, ret; | |
1194 | ||
1195 | mutex_lock(&data->lock); | |
1196 | ||
1197 | if (state) { | |
1198 | data->autonomous = true; | |
1199 | err = i2c_smbus_write_byte_data(data->client, | |
1200 | SI1145_REG_INT_CFG, SI1145_INT_CFG_OE); | |
1201 | if (err < 0) | |
1202 | goto disable; | |
1203 | err = i2c_smbus_write_byte_data(data->client, | |
1204 | SI1145_REG_IRQ_ENABLE, SI1145_MASK_ALL_IE); | |
1205 | if (err < 0) | |
1206 | goto disable; | |
1207 | err = si1145_set_meas_rate(data, data->meas_rate); | |
1208 | if (err < 0) | |
1209 | goto disable; | |
1210 | err = si1145_command(data, SI1145_CMD_PSALS_AUTO); | |
1211 | if (err < 0) | |
1212 | goto disable; | |
1213 | } else { | |
1214 | disable: | |
1215 | /* Disable as much as possible skipping errors */ | |
1216 | ret = si1145_command(data, SI1145_CMD_PSALS_PAUSE); | |
1217 | if (ret < 0 && !err) | |
1218 | err = ret; | |
1219 | ret = si1145_set_meas_rate(data, 0); | |
1220 | if (ret < 0 && !err) | |
1221 | err = ret; | |
1222 | ret = i2c_smbus_write_byte_data(data->client, | |
1223 | SI1145_REG_IRQ_ENABLE, 0); | |
1224 | if (ret < 0 && !err) | |
1225 | err = ret; | |
1226 | ret = i2c_smbus_write_byte_data(data->client, | |
1227 | SI1145_REG_INT_CFG, 0); | |
1228 | if (ret < 0 && !err) | |
1229 | err = ret; | |
1230 | data->autonomous = false; | |
1231 | } | |
1232 | ||
1233 | mutex_unlock(&data->lock); | |
1234 | return err; | |
1235 | } | |
1236 | ||
1237 | static const struct iio_trigger_ops si1145_trigger_ops = { | |
ac45e57f PMS |
1238 | .set_trigger_state = si1145_trigger_set_state, |
1239 | }; | |
1240 | ||
1241 | static int si1145_probe_trigger(struct iio_dev *indio_dev) | |
1242 | { | |
1243 | struct si1145_data *data = iio_priv(indio_dev); | |
1244 | struct i2c_client *client = data->client; | |
1245 | struct iio_trigger *trig; | |
1246 | int ret; | |
1247 | ||
1248 | trig = devm_iio_trigger_alloc(&client->dev, | |
1249 | "%s-dev%d", indio_dev->name, indio_dev->id); | |
1250 | if (!trig) | |
1251 | return -ENOMEM; | |
1252 | ||
1253 | trig->dev.parent = &client->dev; | |
1254 | trig->ops = &si1145_trigger_ops; | |
1255 | iio_trigger_set_drvdata(trig, indio_dev); | |
1256 | ||
1257 | ret = devm_request_irq(&client->dev, client->irq, | |
1258 | iio_trigger_generic_data_rdy_poll, | |
1259 | IRQF_TRIGGER_FALLING, | |
1260 | "si1145_irq", | |
1261 | trig); | |
1262 | if (ret < 0) { | |
1263 | dev_err(&client->dev, "irq request failed\n"); | |
1264 | return ret; | |
1265 | } | |
1266 | ||
1267 | ret = iio_trigger_register(trig); | |
1268 | if (ret) | |
1269 | return ret; | |
1270 | ||
1271 | data->trig = trig; | |
1272 | indio_dev->trig = iio_trigger_get(data->trig); | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | static void si1145_remove_trigger(struct iio_dev *indio_dev) | |
1278 | { | |
1279 | struct si1145_data *data = iio_priv(indio_dev); | |
1280 | ||
1281 | if (data->trig) { | |
1282 | iio_trigger_unregister(data->trig); | |
1283 | data->trig = NULL; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | static int si1145_probe(struct i2c_client *client, | |
1288 | const struct i2c_device_id *id) | |
1289 | { | |
1290 | struct si1145_data *data; | |
1291 | struct iio_dev *indio_dev; | |
1292 | u8 part_id, rev_id, seq_id; | |
1293 | int ret; | |
1294 | ||
1295 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); | |
1296 | if (!indio_dev) | |
1297 | return -ENOMEM; | |
1298 | ||
1299 | data = iio_priv(indio_dev); | |
1300 | i2c_set_clientdata(client, indio_dev); | |
1301 | data->client = client; | |
1302 | data->part_info = &si1145_part_info[id->driver_data]; | |
1303 | ||
1304 | part_id = ret = i2c_smbus_read_byte_data(data->client, | |
1305 | SI1145_REG_PART_ID); | |
1306 | if (ret < 0) | |
1307 | return ret; | |
1308 | rev_id = ret = i2c_smbus_read_byte_data(data->client, | |
1309 | SI1145_REG_REV_ID); | |
1310 | if (ret < 0) | |
1311 | return ret; | |
1312 | seq_id = ret = i2c_smbus_read_byte_data(data->client, | |
1313 | SI1145_REG_SEQ_ID); | |
1314 | if (ret < 0) | |
1315 | return ret; | |
1316 | dev_info(&client->dev, "device ID part %#02hhx rev %#02hhx seq %#02hhx\n", | |
1317 | part_id, rev_id, seq_id); | |
1318 | if (part_id != data->part_info->part) { | |
1319 | dev_err(&client->dev, "part ID mismatch got %#02hhx, expected %#02x\n", | |
1320 | part_id, data->part_info->part); | |
1321 | return -ENODEV; | |
1322 | } | |
1323 | ||
1324 | indio_dev->dev.parent = &client->dev; | |
1325 | indio_dev->name = id->name; | |
1326 | indio_dev->channels = data->part_info->channels; | |
1327 | indio_dev->num_channels = data->part_info->num_channels; | |
1328 | indio_dev->info = data->part_info->iio_info; | |
1329 | indio_dev->modes = INDIO_DIRECT_MODE; | |
1330 | ||
1331 | mutex_init(&data->lock); | |
1332 | mutex_init(&data->cmdlock); | |
1333 | ||
1334 | ret = si1145_initialize(data); | |
1335 | if (ret < 0) | |
1336 | return ret; | |
1337 | ||
1338 | ret = iio_triggered_buffer_setup(indio_dev, NULL, | |
1339 | si1145_trigger_handler, &si1145_buffer_setup_ops); | |
1340 | if (ret < 0) | |
1341 | return ret; | |
1342 | ||
1343 | if (client->irq) { | |
1344 | ret = si1145_probe_trigger(indio_dev); | |
1345 | if (ret < 0) | |
1346 | goto error_free_buffer; | |
1347 | } else { | |
1348 | dev_info(&client->dev, "no irq, using polling\n"); | |
1349 | } | |
1350 | ||
1351 | ret = iio_device_register(indio_dev); | |
1352 | if (ret < 0) | |
1353 | goto error_free_trigger; | |
1354 | ||
1355 | return 0; | |
1356 | ||
1357 | error_free_trigger: | |
1358 | si1145_remove_trigger(indio_dev); | |
1359 | error_free_buffer: | |
1360 | iio_triggered_buffer_cleanup(indio_dev); | |
1361 | ||
1362 | return ret; | |
1363 | } | |
1364 | ||
1365 | static const struct i2c_device_id si1145_ids[] = { | |
1366 | { "si1132", SI1132 }, | |
1367 | { "si1141", SI1141 }, | |
1368 | { "si1142", SI1142 }, | |
1369 | { "si1143", SI1143 }, | |
1370 | { "si1145", SI1145 }, | |
1371 | { "si1146", SI1146 }, | |
1372 | { "si1147", SI1147 }, | |
1373 | { } | |
1374 | }; | |
1375 | MODULE_DEVICE_TABLE(i2c, si1145_ids); | |
1376 | ||
1377 | static int si1145_remove(struct i2c_client *client) | |
1378 | { | |
1379 | struct iio_dev *indio_dev = i2c_get_clientdata(client); | |
1380 | ||
1381 | iio_device_unregister(indio_dev); | |
1382 | si1145_remove_trigger(indio_dev); | |
1383 | iio_triggered_buffer_cleanup(indio_dev); | |
1384 | ||
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | static struct i2c_driver si1145_driver = { | |
1389 | .driver = { | |
1390 | .name = "si1145", | |
1391 | }, | |
1392 | .probe = si1145_probe, | |
1393 | .remove = si1145_remove, | |
1394 | .id_table = si1145_ids, | |
1395 | }; | |
1396 | ||
1397 | module_i2c_driver(si1145_driver); | |
1398 | ||
1399 | MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>"); | |
1400 | MODULE_DESCRIPTION("Silabs SI1132 and SI1141/2/3/5/6/7 proximity, ambient light and UV index sensor driver"); | |
1401 | MODULE_LICENSE("GPL"); |