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13#include <linux/device.h>
14#include <linux/err.h>
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/spi/spi.h>
18#include <linux/i2c.h>
19#include <linux/slab.h>
20#include <linux/sysfs.h>
21#include <linux/regulator/consumer.h>
22#include <asm/unaligned.h>
23
24#include <linux/iio/iio.h>
25#include <linux/iio/sysfs.h>
26
27#define AD5064_MAX_DAC_CHANNELS 8
28#define AD5064_MAX_VREFS 4
29
30#define AD5064_ADDR(x) ((x) << 20)
31#define AD5064_CMD(x) ((x) << 24)
32
33#define AD5064_ADDR_ALL_DAC 0xF
34
35#define AD5064_CMD_WRITE_INPUT_N 0x0
36#define AD5064_CMD_UPDATE_DAC_N 0x1
37#define AD5064_CMD_WRITE_INPUT_N_UPDATE_ALL 0x2
38#define AD5064_CMD_WRITE_INPUT_N_UPDATE_N 0x3
39#define AD5064_CMD_POWERDOWN_DAC 0x4
40#define AD5064_CMD_CLEAR 0x5
41#define AD5064_CMD_LDAC_MASK 0x6
42#define AD5064_CMD_RESET 0x7
43#define AD5064_CMD_CONFIG 0x8
44
45#define AD5064_CMD_RESET_V2 0x5
46#define AD5064_CMD_CONFIG_V2 0x7
47
48#define AD5064_CONFIG_DAISY_CHAIN_ENABLE BIT(1)
49#define AD5064_CONFIG_INT_VREF_ENABLE BIT(0)
50
51#define AD5064_LDAC_PWRDN_NONE 0x0
52#define AD5064_LDAC_PWRDN_1K 0x1
53#define AD5064_LDAC_PWRDN_100K 0x2
54#define AD5064_LDAC_PWRDN_3STATE 0x3
55
56
57
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59
60
61
62enum ad5064_regmap_type {
63 AD5064_REGMAP_ADI,
64 AD5064_REGMAP_ADI2,
65 AD5064_REGMAP_LTC,
66};
67
68
69
70
71
72
73
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76
77
78struct ad5064_chip_info {
79 bool shared_vref;
80 unsigned long internal_vref;
81 const struct iio_chan_spec *channels;
82 unsigned int num_channels;
83 enum ad5064_regmap_type regmap_type;
84};
85
86struct ad5064_state;
87
88typedef int (*ad5064_write_func)(struct ad5064_state *st, unsigned int cmd,
89 unsigned int addr, unsigned int val);
90
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103
104
105struct ad5064_state {
106 struct device *dev;
107 const struct ad5064_chip_info *chip_info;
108 struct regulator_bulk_data vref_reg[AD5064_MAX_VREFS];
109 bool pwr_down[AD5064_MAX_DAC_CHANNELS];
110 u8 pwr_down_mode[AD5064_MAX_DAC_CHANNELS];
111 unsigned int dac_cache[AD5064_MAX_DAC_CHANNELS];
112 bool use_internal_vref;
113
114 ad5064_write_func write;
115
116
117
118
119
120 union {
121 u8 i2c[3];
122 __be32 spi;
123 } data ____cacheline_aligned;
124};
125
126enum ad5064_type {
127 ID_AD5024,
128 ID_AD5025,
129 ID_AD5044,
130 ID_AD5045,
131 ID_AD5064,
132 ID_AD5064_1,
133 ID_AD5065,
134 ID_AD5625,
135 ID_AD5625R_1V25,
136 ID_AD5625R_2V5,
137 ID_AD5627,
138 ID_AD5627R_1V25,
139 ID_AD5627R_2V5,
140 ID_AD5628_1,
141 ID_AD5628_2,
142 ID_AD5629_1,
143 ID_AD5629_2,
144 ID_AD5645R_1V25,
145 ID_AD5645R_2V5,
146 ID_AD5647R_1V25,
147 ID_AD5647R_2V5,
148 ID_AD5648_1,
149 ID_AD5648_2,
150 ID_AD5665,
151 ID_AD5665R_1V25,
152 ID_AD5665R_2V5,
153 ID_AD5666_1,
154 ID_AD5666_2,
155 ID_AD5667,
156 ID_AD5667R_1V25,
157 ID_AD5667R_2V5,
158 ID_AD5668_1,
159 ID_AD5668_2,
160 ID_AD5669_1,
161 ID_AD5669_2,
162 ID_LTC2606,
163 ID_LTC2607,
164 ID_LTC2609,
165 ID_LTC2616,
166 ID_LTC2617,
167 ID_LTC2619,
168 ID_LTC2626,
169 ID_LTC2627,
170 ID_LTC2629,
171};
172
173static int ad5064_write(struct ad5064_state *st, unsigned int cmd,
174 unsigned int addr, unsigned int val, unsigned int shift)
175{
176 val <<= shift;
177
178 return st->write(st, cmd, addr, val);
179}
180
181static int ad5064_sync_powerdown_mode(struct ad5064_state *st,
182 const struct iio_chan_spec *chan)
183{
184 unsigned int val, address;
185 unsigned int shift;
186 int ret;
187
188 if (st->chip_info->regmap_type == AD5064_REGMAP_LTC) {
189 val = 0;
190 address = chan->address;
191 } else {
192 if (st->chip_info->regmap_type == AD5064_REGMAP_ADI2)
193 shift = 4;
194 else
195 shift = 8;
196
197 val = (0x1 << chan->address);
198 address = 0;
199
200 if (st->pwr_down[chan->channel])
201 val |= st->pwr_down_mode[chan->channel] << shift;
202 }
203
204 ret = ad5064_write(st, AD5064_CMD_POWERDOWN_DAC, address, val, 0);
205
206 return ret;
207}
208
209static const char * const ad5064_powerdown_modes[] = {
210 "1kohm_to_gnd",
211 "100kohm_to_gnd",
212 "three_state",
213};
214
215static const char * const ltc2617_powerdown_modes[] = {
216 "90kohm_to_gnd",
217};
218
219static int ad5064_get_powerdown_mode(struct iio_dev *indio_dev,
220 const struct iio_chan_spec *chan)
221{
222 struct ad5064_state *st = iio_priv(indio_dev);
223
224 return st->pwr_down_mode[chan->channel] - 1;
225}
226
227static int ad5064_set_powerdown_mode(struct iio_dev *indio_dev,
228 const struct iio_chan_spec *chan, unsigned int mode)
229{
230 struct ad5064_state *st = iio_priv(indio_dev);
231 int ret;
232
233 mutex_lock(&indio_dev->mlock);
234 st->pwr_down_mode[chan->channel] = mode + 1;
235
236 ret = ad5064_sync_powerdown_mode(st, chan);
237 mutex_unlock(&indio_dev->mlock);
238
239 return ret;
240}
241
242static const struct iio_enum ad5064_powerdown_mode_enum = {
243 .items = ad5064_powerdown_modes,
244 .num_items = ARRAY_SIZE(ad5064_powerdown_modes),
245 .get = ad5064_get_powerdown_mode,
246 .set = ad5064_set_powerdown_mode,
247};
248
249static const struct iio_enum ltc2617_powerdown_mode_enum = {
250 .items = ltc2617_powerdown_modes,
251 .num_items = ARRAY_SIZE(ltc2617_powerdown_modes),
252 .get = ad5064_get_powerdown_mode,
253 .set = ad5064_set_powerdown_mode,
254};
255
256static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev,
257 uintptr_t private, const struct iio_chan_spec *chan, char *buf)
258{
259 struct ad5064_state *st = iio_priv(indio_dev);
260
261 return sprintf(buf, "%d\n", st->pwr_down[chan->channel]);
262}
263
264static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev,
265 uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
266 size_t len)
267{
268 struct ad5064_state *st = iio_priv(indio_dev);
269 bool pwr_down;
270 int ret;
271
272 ret = strtobool(buf, &pwr_down);
273 if (ret)
274 return ret;
275
276 mutex_lock(&indio_dev->mlock);
277 st->pwr_down[chan->channel] = pwr_down;
278
279 ret = ad5064_sync_powerdown_mode(st, chan);
280 mutex_unlock(&indio_dev->mlock);
281 return ret ? ret : len;
282}
283
284static int ad5064_get_vref(struct ad5064_state *st,
285 struct iio_chan_spec const *chan)
286{
287 unsigned int i;
288
289 if (st->use_internal_vref)
290 return st->chip_info->internal_vref;
291
292 i = st->chip_info->shared_vref ? 0 : chan->channel;
293 return regulator_get_voltage(st->vref_reg[i].consumer);
294}
295
296static int ad5064_read_raw(struct iio_dev *indio_dev,
297 struct iio_chan_spec const *chan,
298 int *val,
299 int *val2,
300 long m)
301{
302 struct ad5064_state *st = iio_priv(indio_dev);
303 int scale_uv;
304
305 switch (m) {
306 case IIO_CHAN_INFO_RAW:
307 *val = st->dac_cache[chan->channel];
308 return IIO_VAL_INT;
309 case IIO_CHAN_INFO_SCALE:
310 scale_uv = ad5064_get_vref(st, chan);
311 if (scale_uv < 0)
312 return scale_uv;
313
314 *val = scale_uv / 1000;
315 *val2 = chan->scan_type.realbits;
316 return IIO_VAL_FRACTIONAL_LOG2;
317 default:
318 break;
319 }
320 return -EINVAL;
321}
322
323static int ad5064_write_raw(struct iio_dev *indio_dev,
324 struct iio_chan_spec const *chan, int val, int val2, long mask)
325{
326 struct ad5064_state *st = iio_priv(indio_dev);
327 int ret;
328
329 switch (mask) {
330 case IIO_CHAN_INFO_RAW:
331 if (val >= (1 << chan->scan_type.realbits) || val < 0)
332 return -EINVAL;
333
334 mutex_lock(&indio_dev->mlock);
335 ret = ad5064_write(st, AD5064_CMD_WRITE_INPUT_N_UPDATE_N,
336 chan->address, val, chan->scan_type.shift);
337 if (ret == 0)
338 st->dac_cache[chan->channel] = val;
339 mutex_unlock(&indio_dev->mlock);
340 break;
341 default:
342 ret = -EINVAL;
343 }
344
345 return ret;
346}
347
348static const struct iio_info ad5064_info = {
349 .read_raw = ad5064_read_raw,
350 .write_raw = ad5064_write_raw,
351 .driver_module = THIS_MODULE,
352};
353
354static const struct iio_chan_spec_ext_info ad5064_ext_info[] = {
355 {
356 .name = "powerdown",
357 .read = ad5064_read_dac_powerdown,
358 .write = ad5064_write_dac_powerdown,
359 .shared = IIO_SEPARATE,
360 },
361 IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ad5064_powerdown_mode_enum),
362 IIO_ENUM_AVAILABLE("powerdown_mode", &ad5064_powerdown_mode_enum),
363 { },
364};
365
366static const struct iio_chan_spec_ext_info ltc2617_ext_info[] = {
367 {
368 .name = "powerdown",
369 .read = ad5064_read_dac_powerdown,
370 .write = ad5064_write_dac_powerdown,
371 .shared = IIO_SEPARATE,
372 },
373 IIO_ENUM("powerdown_mode", IIO_SEPARATE, <c2617_powerdown_mode_enum),
374 IIO_ENUM_AVAILABLE("powerdown_mode", <c2617_powerdown_mode_enum),
375 { },
376};
377
378#define AD5064_CHANNEL(chan, addr, bits, _shift, _ext_info) { \
379 .type = IIO_VOLTAGE, \
380 .indexed = 1, \
381 .output = 1, \
382 .channel = (chan), \
383 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
384 BIT(IIO_CHAN_INFO_SCALE), \
385 .address = addr, \
386 .scan_type = { \
387 .sign = 'u', \
388 .realbits = (bits), \
389 .storagebits = 16, \
390 .shift = (_shift), \
391 }, \
392 .ext_info = (_ext_info), \
393}
394
395#define DECLARE_AD5064_CHANNELS(name, bits, shift, ext_info) \
396const struct iio_chan_spec name[] = { \
397 AD5064_CHANNEL(0, 0, bits, shift, ext_info), \
398 AD5064_CHANNEL(1, 1, bits, shift, ext_info), \
399 AD5064_CHANNEL(2, 2, bits, shift, ext_info), \
400 AD5064_CHANNEL(3, 3, bits, shift, ext_info), \
401 AD5064_CHANNEL(4, 4, bits, shift, ext_info), \
402 AD5064_CHANNEL(5, 5, bits, shift, ext_info), \
403 AD5064_CHANNEL(6, 6, bits, shift, ext_info), \
404 AD5064_CHANNEL(7, 7, bits, shift, ext_info), \
405}
406
407#define DECLARE_AD5065_CHANNELS(name, bits, shift, ext_info) \
408const struct iio_chan_spec name[] = { \
409 AD5064_CHANNEL(0, 0, bits, shift, ext_info), \
410 AD5064_CHANNEL(1, 3, bits, shift, ext_info), \
411}
412
413static DECLARE_AD5064_CHANNELS(ad5024_channels, 12, 8, ad5064_ext_info);
414static DECLARE_AD5064_CHANNELS(ad5044_channels, 14, 6, ad5064_ext_info);
415static DECLARE_AD5064_CHANNELS(ad5064_channels, 16, 4, ad5064_ext_info);
416
417static DECLARE_AD5065_CHANNELS(ad5025_channels, 12, 8, ad5064_ext_info);
418static DECLARE_AD5065_CHANNELS(ad5045_channels, 14, 6, ad5064_ext_info);
419static DECLARE_AD5065_CHANNELS(ad5065_channels, 16, 4, ad5064_ext_info);
420
421static DECLARE_AD5064_CHANNELS(ad5629_channels, 12, 4, ad5064_ext_info);
422static DECLARE_AD5064_CHANNELS(ad5645_channels, 14, 2, ad5064_ext_info);
423static DECLARE_AD5064_CHANNELS(ad5669_channels, 16, 0, ad5064_ext_info);
424
425static DECLARE_AD5064_CHANNELS(ltc2607_channels, 16, 0, ltc2617_ext_info);
426static DECLARE_AD5064_CHANNELS(ltc2617_channels, 14, 2, ltc2617_ext_info);
427static DECLARE_AD5064_CHANNELS(ltc2627_channels, 12, 4, ltc2617_ext_info);
428
429static const struct ad5064_chip_info ad5064_chip_info_tbl[] = {
430 [ID_AD5024] = {
431 .shared_vref = false,
432 .channels = ad5024_channels,
433 .num_channels = 4,
434 .regmap_type = AD5064_REGMAP_ADI,
435 },
436 [ID_AD5025] = {
437 .shared_vref = false,
438 .channels = ad5025_channels,
439 .num_channels = 2,
440 .regmap_type = AD5064_REGMAP_ADI,
441 },
442 [ID_AD5044] = {
443 .shared_vref = false,
444 .channels = ad5044_channels,
445 .num_channels = 4,
446 .regmap_type = AD5064_REGMAP_ADI,
447 },
448 [ID_AD5045] = {
449 .shared_vref = false,
450 .channels = ad5045_channels,
451 .num_channels = 2,
452 .regmap_type = AD5064_REGMAP_ADI,
453 },
454 [ID_AD5064] = {
455 .shared_vref = false,
456 .channels = ad5064_channels,
457 .num_channels = 4,
458 .regmap_type = AD5064_REGMAP_ADI,
459 },
460 [ID_AD5064_1] = {
461 .shared_vref = true,
462 .channels = ad5064_channels,
463 .num_channels = 4,
464 .regmap_type = AD5064_REGMAP_ADI,
465 },
466 [ID_AD5065] = {
467 .shared_vref = false,
468 .channels = ad5065_channels,
469 .num_channels = 2,
470 .regmap_type = AD5064_REGMAP_ADI,
471 },
472 [ID_AD5625] = {
473 .shared_vref = true,
474 .channels = ad5629_channels,
475 .num_channels = 4,
476 .regmap_type = AD5064_REGMAP_ADI2
477 },
478 [ID_AD5625R_1V25] = {
479 .shared_vref = true,
480 .internal_vref = 1250000,
481 .channels = ad5629_channels,
482 .num_channels = 4,
483 .regmap_type = AD5064_REGMAP_ADI2
484 },
485 [ID_AD5625R_2V5] = {
486 .shared_vref = true,
487 .internal_vref = 2500000,
488 .channels = ad5629_channels,
489 .num_channels = 4,
490 .regmap_type = AD5064_REGMAP_ADI2
491 },
492 [ID_AD5627] = {
493 .shared_vref = true,
494 .channels = ad5629_channels,
495 .num_channels = 2,
496 .regmap_type = AD5064_REGMAP_ADI2
497 },
498 [ID_AD5627R_1V25] = {
499 .shared_vref = true,
500 .internal_vref = 1250000,
501 .channels = ad5629_channels,
502 .num_channels = 2,
503 .regmap_type = AD5064_REGMAP_ADI2
504 },
505 [ID_AD5627R_2V5] = {
506 .shared_vref = true,
507 .internal_vref = 2500000,
508 .channels = ad5629_channels,
509 .num_channels = 2,
510 .regmap_type = AD5064_REGMAP_ADI2
511 },
512 [ID_AD5628_1] = {
513 .shared_vref = true,
514 .internal_vref = 2500000,
515 .channels = ad5024_channels,
516 .num_channels = 8,
517 .regmap_type = AD5064_REGMAP_ADI,
518 },
519 [ID_AD5628_2] = {
520 .shared_vref = true,
521 .internal_vref = 5000000,
522 .channels = ad5024_channels,
523 .num_channels = 8,
524 .regmap_type = AD5064_REGMAP_ADI,
525 },
526 [ID_AD5629_1] = {
527 .shared_vref = true,
528 .internal_vref = 2500000,
529 .channels = ad5629_channels,
530 .num_channels = 8,
531 .regmap_type = AD5064_REGMAP_ADI,
532 },
533 [ID_AD5629_2] = {
534 .shared_vref = true,
535 .internal_vref = 5000000,
536 .channels = ad5629_channels,
537 .num_channels = 8,
538 .regmap_type = AD5064_REGMAP_ADI,
539 },
540 [ID_AD5645R_1V25] = {
541 .shared_vref = true,
542 .internal_vref = 1250000,
543 .channels = ad5645_channels,
544 .num_channels = 4,
545 .regmap_type = AD5064_REGMAP_ADI2
546 },
547 [ID_AD5645R_2V5] = {
548 .shared_vref = true,
549 .internal_vref = 2500000,
550 .channels = ad5645_channels,
551 .num_channels = 4,
552 .regmap_type = AD5064_REGMAP_ADI2
553 },
554 [ID_AD5647R_1V25] = {
555 .shared_vref = true,
556 .internal_vref = 1250000,
557 .channels = ad5645_channels,
558 .num_channels = 2,
559 .regmap_type = AD5064_REGMAP_ADI2
560 },
561 [ID_AD5647R_2V5] = {
562 .shared_vref = true,
563 .internal_vref = 2500000,
564 .channels = ad5645_channels,
565 .num_channels = 2,
566 .regmap_type = AD5064_REGMAP_ADI2
567 },
568 [ID_AD5648_1] = {
569 .shared_vref = true,
570 .internal_vref = 2500000,
571 .channels = ad5044_channels,
572 .num_channels = 8,
573 .regmap_type = AD5064_REGMAP_ADI,
574 },
575 [ID_AD5648_2] = {
576 .shared_vref = true,
577 .internal_vref = 5000000,
578 .channels = ad5044_channels,
579 .num_channels = 8,
580 .regmap_type = AD5064_REGMAP_ADI,
581 },
582 [ID_AD5665] = {
583 .shared_vref = true,
584 .channels = ad5669_channels,
585 .num_channels = 4,
586 .regmap_type = AD5064_REGMAP_ADI2
587 },
588 [ID_AD5665R_1V25] = {
589 .shared_vref = true,
590 .internal_vref = 1250000,
591 .channels = ad5669_channels,
592 .num_channels = 4,
593 .regmap_type = AD5064_REGMAP_ADI2
594 },
595 [ID_AD5665R_2V5] = {
596 .shared_vref = true,
597 .internal_vref = 2500000,
598 .channels = ad5669_channels,
599 .num_channels = 4,
600 .regmap_type = AD5064_REGMAP_ADI2
601 },
602 [ID_AD5666_1] = {
603 .shared_vref = true,
604 .internal_vref = 2500000,
605 .channels = ad5064_channels,
606 .num_channels = 4,
607 .regmap_type = AD5064_REGMAP_ADI,
608 },
609 [ID_AD5666_2] = {
610 .shared_vref = true,
611 .internal_vref = 5000000,
612 .channels = ad5064_channels,
613 .num_channels = 4,
614 .regmap_type = AD5064_REGMAP_ADI,
615 },
616 [ID_AD5667] = {
617 .shared_vref = true,
618 .channels = ad5669_channels,
619 .num_channels = 2,
620 .regmap_type = AD5064_REGMAP_ADI2
621 },
622 [ID_AD5667R_1V25] = {
623 .shared_vref = true,
624 .internal_vref = 1250000,
625 .channels = ad5669_channels,
626 .num_channels = 2,
627 .regmap_type = AD5064_REGMAP_ADI2
628 },
629 [ID_AD5667R_2V5] = {
630 .shared_vref = true,
631 .internal_vref = 2500000,
632 .channels = ad5669_channels,
633 .num_channels = 2,
634 .regmap_type = AD5064_REGMAP_ADI2
635 },
636 [ID_AD5668_1] = {
637 .shared_vref = true,
638 .internal_vref = 2500000,
639 .channels = ad5064_channels,
640 .num_channels = 8,
641 .regmap_type = AD5064_REGMAP_ADI,
642 },
643 [ID_AD5668_2] = {
644 .shared_vref = true,
645 .internal_vref = 5000000,
646 .channels = ad5064_channels,
647 .num_channels = 8,
648 .regmap_type = AD5064_REGMAP_ADI,
649 },
650 [ID_AD5669_1] = {
651 .shared_vref = true,
652 .internal_vref = 2500000,
653 .channels = ad5669_channels,
654 .num_channels = 8,
655 .regmap_type = AD5064_REGMAP_ADI,
656 },
657 [ID_AD5669_2] = {
658 .shared_vref = true,
659 .internal_vref = 5000000,
660 .channels = ad5669_channels,
661 .num_channels = 8,
662 .regmap_type = AD5064_REGMAP_ADI,
663 },
664 [ID_LTC2606] = {
665 .shared_vref = true,
666 .internal_vref = 0,
667 .channels = ltc2607_channels,
668 .num_channels = 1,
669 .regmap_type = AD5064_REGMAP_LTC,
670 },
671 [ID_LTC2607] = {
672 .shared_vref = true,
673 .internal_vref = 0,
674 .channels = ltc2607_channels,
675 .num_channels = 2,
676 .regmap_type = AD5064_REGMAP_LTC,
677 },
678 [ID_LTC2609] = {
679 .shared_vref = false,
680 .internal_vref = 0,
681 .channels = ltc2607_channels,
682 .num_channels = 4,
683 .regmap_type = AD5064_REGMAP_LTC,
684 },
685 [ID_LTC2616] = {
686 .shared_vref = true,
687 .internal_vref = 0,
688 .channels = ltc2617_channels,
689 .num_channels = 1,
690 .regmap_type = AD5064_REGMAP_LTC,
691 },
692 [ID_LTC2617] = {
693 .shared_vref = true,
694 .internal_vref = 0,
695 .channels = ltc2617_channels,
696 .num_channels = 2,
697 .regmap_type = AD5064_REGMAP_LTC,
698 },
699 [ID_LTC2619] = {
700 .shared_vref = false,
701 .internal_vref = 0,
702 .channels = ltc2617_channels,
703 .num_channels = 4,
704 .regmap_type = AD5064_REGMAP_LTC,
705 },
706 [ID_LTC2626] = {
707 .shared_vref = true,
708 .internal_vref = 0,
709 .channels = ltc2627_channels,
710 .num_channels = 1,
711 .regmap_type = AD5064_REGMAP_LTC,
712 },
713 [ID_LTC2627] = {
714 .shared_vref = true,
715 .internal_vref = 0,
716 .channels = ltc2627_channels,
717 .num_channels = 2,
718 .regmap_type = AD5064_REGMAP_LTC,
719 },
720 [ID_LTC2629] = {
721 .shared_vref = false,
722 .internal_vref = 0,
723 .channels = ltc2627_channels,
724 .num_channels = 4,
725 .regmap_type = AD5064_REGMAP_LTC,
726 },
727};
728
729static inline unsigned int ad5064_num_vref(struct ad5064_state *st)
730{
731 return st->chip_info->shared_vref ? 1 : st->chip_info->num_channels;
732}
733
734static const char * const ad5064_vref_names[] = {
735 "vrefA",
736 "vrefB",
737 "vrefC",
738 "vrefD",
739};
740
741static const char * const ad5064_vref_name(struct ad5064_state *st,
742 unsigned int vref)
743{
744 return st->chip_info->shared_vref ? "vref" : ad5064_vref_names[vref];
745}
746
747static int ad5064_set_config(struct ad5064_state *st, unsigned int val)
748{
749 unsigned int cmd;
750
751 switch (st->chip_info->regmap_type) {
752 case AD5064_REGMAP_ADI2:
753 cmd = AD5064_CMD_CONFIG_V2;
754 break;
755 default:
756 cmd = AD5064_CMD_CONFIG;
757 break;
758 }
759
760 return ad5064_write(st, cmd, 0, val, 0);
761}
762
763static int ad5064_probe(struct device *dev, enum ad5064_type type,
764 const char *name, ad5064_write_func write)
765{
766 struct iio_dev *indio_dev;
767 struct ad5064_state *st;
768 unsigned int midscale;
769 unsigned int i;
770 int ret;
771
772 indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
773 if (indio_dev == NULL)
774 return -ENOMEM;
775
776 st = iio_priv(indio_dev);
777 dev_set_drvdata(dev, indio_dev);
778
779 st->chip_info = &ad5064_chip_info_tbl[type];
780 st->dev = dev;
781 st->write = write;
782
783 for (i = 0; i < ad5064_num_vref(st); ++i)
784 st->vref_reg[i].supply = ad5064_vref_name(st, i);
785
786 ret = devm_regulator_bulk_get(dev, ad5064_num_vref(st),
787 st->vref_reg);
788 if (ret) {
789 if (!st->chip_info->internal_vref)
790 return ret;
791 st->use_internal_vref = true;
792 ret = ad5064_set_config(st, AD5064_CONFIG_INT_VREF_ENABLE);
793 if (ret) {
794 dev_err(dev, "Failed to enable internal vref: %d\n",
795 ret);
796 return ret;
797 }
798 } else {
799 ret = regulator_bulk_enable(ad5064_num_vref(st), st->vref_reg);
800 if (ret)
801 return ret;
802 }
803
804 indio_dev->dev.parent = dev;
805 indio_dev->name = name;
806 indio_dev->info = &ad5064_info;
807 indio_dev->modes = INDIO_DIRECT_MODE;
808 indio_dev->channels = st->chip_info->channels;
809 indio_dev->num_channels = st->chip_info->num_channels;
810
811 midscale = (1 << indio_dev->channels[0].scan_type.realbits) / 2;
812
813 for (i = 0; i < st->chip_info->num_channels; ++i) {
814 st->pwr_down_mode[i] = AD5064_LDAC_PWRDN_1K;
815 st->dac_cache[i] = midscale;
816 }
817
818 ret = iio_device_register(indio_dev);
819 if (ret)
820 goto error_disable_reg;
821
822 return 0;
823
824error_disable_reg:
825 if (!st->use_internal_vref)
826 regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg);
827
828 return ret;
829}
830
831static int ad5064_remove(struct device *dev)
832{
833 struct iio_dev *indio_dev = dev_get_drvdata(dev);
834 struct ad5064_state *st = iio_priv(indio_dev);
835
836 iio_device_unregister(indio_dev);
837
838 if (!st->use_internal_vref)
839 regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg);
840
841 return 0;
842}
843
844#if IS_ENABLED(CONFIG_SPI_MASTER)
845
846static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd,
847 unsigned int addr, unsigned int val)
848{
849 struct spi_device *spi = to_spi_device(st->dev);
850
851 st->data.spi = cpu_to_be32(AD5064_CMD(cmd) | AD5064_ADDR(addr) | val);
852 return spi_write(spi, &st->data.spi, sizeof(st->data.spi));
853}
854
855static int ad5064_spi_probe(struct spi_device *spi)
856{
857 const struct spi_device_id *id = spi_get_device_id(spi);
858
859 return ad5064_probe(&spi->dev, id->driver_data, id->name,
860 ad5064_spi_write);
861}
862
863static int ad5064_spi_remove(struct spi_device *spi)
864{
865 return ad5064_remove(&spi->dev);
866}
867
868static const struct spi_device_id ad5064_spi_ids[] = {
869 {"ad5024", ID_AD5024},
870 {"ad5025", ID_AD5025},
871 {"ad5044", ID_AD5044},
872 {"ad5045", ID_AD5045},
873 {"ad5064", ID_AD5064},
874 {"ad5064-1", ID_AD5064_1},
875 {"ad5065", ID_AD5065},
876 {"ad5628-1", ID_AD5628_1},
877 {"ad5628-2", ID_AD5628_2},
878 {"ad5648-1", ID_AD5648_1},
879 {"ad5648-2", ID_AD5648_2},
880 {"ad5666-1", ID_AD5666_1},
881 {"ad5666-2", ID_AD5666_2},
882 {"ad5668-1", ID_AD5668_1},
883 {"ad5668-2", ID_AD5668_2},
884 {"ad5668-3", ID_AD5668_2},
885 {}
886};
887MODULE_DEVICE_TABLE(spi, ad5064_spi_ids);
888
889static struct spi_driver ad5064_spi_driver = {
890 .driver = {
891 .name = "ad5064",
892 },
893 .probe = ad5064_spi_probe,
894 .remove = ad5064_spi_remove,
895 .id_table = ad5064_spi_ids,
896};
897
898static int __init ad5064_spi_register_driver(void)
899{
900 return spi_register_driver(&ad5064_spi_driver);
901}
902
903static void ad5064_spi_unregister_driver(void)
904{
905 spi_unregister_driver(&ad5064_spi_driver);
906}
907
908#else
909
910static inline int ad5064_spi_register_driver(void) { return 0; }
911static inline void ad5064_spi_unregister_driver(void) { }
912
913#endif
914
915#if IS_ENABLED(CONFIG_I2C)
916
917static int ad5064_i2c_write(struct ad5064_state *st, unsigned int cmd,
918 unsigned int addr, unsigned int val)
919{
920 struct i2c_client *i2c = to_i2c_client(st->dev);
921 unsigned int cmd_shift;
922 int ret;
923
924 switch (st->chip_info->regmap_type) {
925 case AD5064_REGMAP_ADI2:
926 cmd_shift = 3;
927 break;
928 default:
929 cmd_shift = 4;
930 break;
931 }
932
933 st->data.i2c[0] = (cmd << cmd_shift) | addr;
934 put_unaligned_be16(val, &st->data.i2c[1]);
935
936 ret = i2c_master_send(i2c, st->data.i2c, 3);
937 if (ret < 0)
938 return ret;
939
940 return 0;
941}
942
943static int ad5064_i2c_probe(struct i2c_client *i2c,
944 const struct i2c_device_id *id)
945{
946 return ad5064_probe(&i2c->dev, id->driver_data, id->name,
947 ad5064_i2c_write);
948}
949
950static int ad5064_i2c_remove(struct i2c_client *i2c)
951{
952 return ad5064_remove(&i2c->dev);
953}
954
955static const struct i2c_device_id ad5064_i2c_ids[] = {
956 {"ad5625", ID_AD5625 },
957 {"ad5625r-1v25", ID_AD5625R_1V25 },
958 {"ad5625r-2v5", ID_AD5625R_2V5 },
959 {"ad5627", ID_AD5627 },
960 {"ad5627r-1v25", ID_AD5627R_1V25 },
961 {"ad5627r-2v5", ID_AD5627R_2V5 },
962 {"ad5629-1", ID_AD5629_1},
963 {"ad5629-2", ID_AD5629_2},
964 {"ad5629-3", ID_AD5629_2},
965 {"ad5645r-1v25", ID_AD5645R_1V25 },
966 {"ad5645r-2v5", ID_AD5645R_2V5 },
967 {"ad5665", ID_AD5665 },
968 {"ad5665r-1v25", ID_AD5665R_1V25 },
969 {"ad5665r-2v5", ID_AD5665R_2V5 },
970 {"ad5667", ID_AD5667 },
971 {"ad5667r-1v25", ID_AD5667R_1V25 },
972 {"ad5667r-2v5", ID_AD5667R_2V5 },
973 {"ad5669-1", ID_AD5669_1},
974 {"ad5669-2", ID_AD5669_2},
975 {"ad5669-3", ID_AD5669_2},
976 {"ltc2606", ID_LTC2606},
977 {"ltc2607", ID_LTC2607},
978 {"ltc2609", ID_LTC2609},
979 {"ltc2616", ID_LTC2616},
980 {"ltc2617", ID_LTC2617},
981 {"ltc2619", ID_LTC2619},
982 {"ltc2626", ID_LTC2626},
983 {"ltc2627", ID_LTC2627},
984 {"ltc2629", ID_LTC2629},
985 {}
986};
987MODULE_DEVICE_TABLE(i2c, ad5064_i2c_ids);
988
989static struct i2c_driver ad5064_i2c_driver = {
990 .driver = {
991 .name = "ad5064",
992 },
993 .probe = ad5064_i2c_probe,
994 .remove = ad5064_i2c_remove,
995 .id_table = ad5064_i2c_ids,
996};
997
998static int __init ad5064_i2c_register_driver(void)
999{
1000 return i2c_add_driver(&ad5064_i2c_driver);
1001}
1002
1003static void __exit ad5064_i2c_unregister_driver(void)
1004{
1005 i2c_del_driver(&ad5064_i2c_driver);
1006}
1007
1008#else
1009
1010static inline int ad5064_i2c_register_driver(void) { return 0; }
1011static inline void ad5064_i2c_unregister_driver(void) { }
1012
1013#endif
1014
1015static int __init ad5064_init(void)
1016{
1017 int ret;
1018
1019 ret = ad5064_spi_register_driver();
1020 if (ret)
1021 return ret;
1022
1023 ret = ad5064_i2c_register_driver();
1024 if (ret) {
1025 ad5064_spi_unregister_driver();
1026 return ret;
1027 }
1028
1029 return 0;
1030}
1031module_init(ad5064_init);
1032
1033static void __exit ad5064_exit(void)
1034{
1035 ad5064_i2c_unregister_driver();
1036 ad5064_spi_unregister_driver();
1037}
1038module_exit(ad5064_exit);
1039
1040MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
1041MODULE_DESCRIPTION("Analog Devices AD5024 and similar multi-channel DACs");
1042MODULE_LICENSE("GPL v2");
1043
