tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * extcon-arizona.c - Extcon driver Wolfson Arizona devices
3 *
4 * Copyright (C) 2012 Wolfson Microelectronics plc
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/i2c.h>
20#include <linux/slab.h>
21#include <linux/interrupt.h>
22#include <linux/err.h>
23#include <linux/gpio.h>
24#include <linux/input.h>
25#include <linux/platform_device.h>
26#include <linux/pm_runtime.h>
27#include <linux/regulator/consumer.h>
28#include <linux/extcon.h>
29
30#include <sound/soc.h>
31
32#include <linux/mfd/arizona/core.h>
33#include <linux/mfd/arizona/pdata.h>
34#include <linux/mfd/arizona/registers.h>
35
36#define ARIZONA_NUM_BUTTONS 6
37
38#define ARIZONA_ACCDET_MODE_MIC 0
39#define ARIZONA_ACCDET_MODE_HPL 1
40#define ARIZONA_ACCDET_MODE_HPR 2
41
42struct arizona_extcon_info {
43 struct device *dev;
44 struct arizona *arizona;
45 struct mutex lock;
46 struct regulator *micvdd;
47 struct input_dev *input;
48
49 int micd_mode;
50 const struct arizona_micd_config *micd_modes;
51 int micd_num_modes;
52
53 bool micd_reva;
54 bool micd_clamp;
55
56 struct delayed_work hpdet_work;
57
58 bool hpdet_active;
59 bool hpdet_done;
60
61 int num_hpdet_res;
62 unsigned int hpdet_res[3];
63
64 bool mic;
65 bool detecting;
66 int jack_flips;
67
68 int hpdet_ip;
69
70 struct extcon_dev edev;
71};
72
73static const struct arizona_micd_config micd_default_modes[] = {
74 { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
75 { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
76};
77
78static struct {
79 u16 status;
80 int report;
81} arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = {
82 { 0x1, BTN_0 },
83 { 0x2, BTN_1 },
84 { 0x4, BTN_2 },
85 { 0x8, BTN_3 },
86 { 0x10, BTN_4 },
87 { 0x20, BTN_5 },
88};
89
90#define ARIZONA_CABLE_MECHANICAL 0
91#define ARIZONA_CABLE_MICROPHONE 1
92#define ARIZONA_CABLE_HEADPHONE 2
93#define ARIZONA_CABLE_LINEOUT 3
94
95static const char *arizona_cable[] = {
96 "Mechanical",
97 "Microphone",
98 "Headphone",
99 "Line-out",
100 NULL,
101};
102
103static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
104{
105 struct arizona *arizona = info->arizona;
106
107 if (arizona->pdata.micd_pol_gpio > 0)
108 gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
109 info->micd_modes[mode].gpio);
110 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
111 ARIZONA_MICD_BIAS_SRC_MASK,
112 info->micd_modes[mode].bias);
113 regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
114 ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
115
116 info->micd_mode = mode;
117
118 dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
119}
120
121static const char *arizona_extcon_get_micbias(struct arizona_extcon_info *info)
122{
123 switch (info->micd_modes[0].bias >> ARIZONA_MICD_BIAS_SRC_SHIFT) {
124 case 1:
125 return "MICBIAS1";
126 case 2:
127 return "MICBIAS2";
128 case 3:
129 return "MICBIAS3";
130 default:
131 return "MICVDD";
132 }
133}
134
135static void arizona_extcon_pulse_micbias(struct arizona_extcon_info *info)
136{
137 struct arizona *arizona = info->arizona;
138 const char *widget = arizona_extcon_get_micbias(info);
139 struct snd_soc_dapm_context *dapm = arizona->dapm;
140 int ret;
141
142 mutex_lock(&dapm->card->dapm_mutex);
143
144 ret = snd_soc_dapm_force_enable_pin(dapm, widget);
145 if (ret != 0)
146 dev_warn(arizona->dev, "Failed to enable %s: %d\n",
147 widget, ret);
148
149 mutex_unlock(&dapm->card->dapm_mutex);
150
151 snd_soc_dapm_sync(dapm);
152
153 if (!arizona->pdata.micd_force_micbias) {
154 mutex_lock(&dapm->card->dapm_mutex);
155
156 ret = snd_soc_dapm_disable_pin(arizona->dapm, widget);
157 if (ret != 0)
158 dev_warn(arizona->dev, "Failed to disable %s: %d\n",
159 widget, ret);
160
161 mutex_unlock(&dapm->card->dapm_mutex);
162
163 snd_soc_dapm_sync(dapm);
164 }
165}
166
167static void arizona_start_mic(struct arizona_extcon_info *info)
168{
169 struct arizona *arizona = info->arizona;
170 bool change;
171 int ret;
172
173 /* Microphone detection can't use idle mode */
174 pm_runtime_get(info->dev);
175
176 if (info->detecting) {
177 ret = regulator_allow_bypass(info->micvdd, false);
178 if (ret != 0) {
179 dev_err(arizona->dev,
180 "Failed to regulate MICVDD: %d\n",
181 ret);
182 }
183 }
184
185 ret = regulator_enable(info->micvdd);
186 if (ret != 0) {
187 dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
188 ret);
189 }
190
191 if (info->micd_reva) {
192 regmap_write(arizona->regmap, 0x80, 0x3);
193 regmap_write(arizona->regmap, 0x294, 0);
194 regmap_write(arizona->regmap, 0x80, 0x0);
195 }
196
197 regmap_update_bits(arizona->regmap,
198 ARIZONA_ACCESSORY_DETECT_MODE_1,
199 ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
200
201 arizona_extcon_pulse_micbias(info);
202
203 regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
204 ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
205 &change);
206 if (!change) {
207 regulator_disable(info->micvdd);
208 pm_runtime_put_autosuspend(info->dev);
209 }
210}
211
212static void arizona_stop_mic(struct arizona_extcon_info *info)
213{
214 struct arizona *arizona = info->arizona;
215 const char *widget = arizona_extcon_get_micbias(info);
216 struct snd_soc_dapm_context *dapm = arizona->dapm;
217 bool change;
218 int ret;
219
220 regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
221 ARIZONA_MICD_ENA, 0,
222 &change);
223
224 mutex_lock(&dapm->card->dapm_mutex);
225
226 ret = snd_soc_dapm_disable_pin(dapm, widget);
227 if (ret != 0)
228 dev_warn(arizona->dev,
229 "Failed to disable %s: %d\n",
230 widget, ret);
231
232 mutex_unlock(&dapm->card->dapm_mutex);
233
234 snd_soc_dapm_sync(dapm);
235
236 if (info->micd_reva) {
237 regmap_write(arizona->regmap, 0x80, 0x3);
238 regmap_write(arizona->regmap, 0x294, 2);
239 regmap_write(arizona->regmap, 0x80, 0x0);
240 }
241
242 ret = regulator_allow_bypass(info->micvdd, true);
243 if (ret != 0) {
244 dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
245 ret);
246 }
247
248 if (change) {
249 regulator_disable(info->micvdd);
250 pm_runtime_mark_last_busy(info->dev);
251 pm_runtime_put_autosuspend(info->dev);
252 }
253}
254
255static struct {
256 unsigned int factor_a;
257 unsigned int factor_b;
258} arizona_hpdet_b_ranges[] = {
259 { 5528, 362464 },
260 { 11084, 6186851 },
261 { 11065, 65460395 },
262};
263
264static struct {
265 int min;
266 int max;
267} arizona_hpdet_c_ranges[] = {
268 { 0, 30 },
269 { 8, 100 },
270 { 100, 1000 },
271 { 1000, 10000 },
272};
273
274static int arizona_hpdet_read(struct arizona_extcon_info *info)
275{
276 struct arizona *arizona = info->arizona;
277 unsigned int val, range;
278 int ret;
279
280 ret = regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_2, &val);
281 if (ret != 0) {
282 dev_err(arizona->dev, "Failed to read HPDET status: %d\n",
283 ret);
284 return ret;
285 }
286
287 switch (info->hpdet_ip) {
288 case 0:
289 if (!(val & ARIZONA_HP_DONE)) {
290 dev_err(arizona->dev, "HPDET did not complete: %x\n",
291 val);
292 return -EAGAIN;
293 }
294
295 val &= ARIZONA_HP_LVL_MASK;
296 break;
297
298 case 1:
299 if (!(val & ARIZONA_HP_DONE_B)) {
300 dev_err(arizona->dev, "HPDET did not complete: %x\n",
301 val);
302 return -EAGAIN;
303 }
304
305 ret = regmap_read(arizona->regmap, ARIZONA_HP_DACVAL, &val);
306 if (ret != 0) {
307 dev_err(arizona->dev, "Failed to read HP value: %d\n",
308 ret);
309 return -EAGAIN;
310 }
311
312 regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
313 &range);
314 range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
315 >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
316
317 if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 &&
318 (val < 100 || val > 0x3fb)) {
319 range++;
320 dev_dbg(arizona->dev, "Moving to HPDET range %d\n",
321 range);
322 regmap_update_bits(arizona->regmap,
323 ARIZONA_HEADPHONE_DETECT_1,
324 ARIZONA_HP_IMPEDANCE_RANGE_MASK,
325 range <<
326 ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
327 return -EAGAIN;
328 }
329
330 /* If we go out of range report top of range */
331 if (val < 100 || val > 0x3fb) {
332 dev_dbg(arizona->dev, "Measurement out of range\n");
333 return 10000;
334 }
335
336 dev_dbg(arizona->dev, "HPDET read %d in range %d\n",
337 val, range);
338
339 val = arizona_hpdet_b_ranges[range].factor_b
340 / ((val * 100) -
341 arizona_hpdet_b_ranges[range].factor_a);
342 break;
343
344 default:
345 dev_warn(arizona->dev, "Unknown HPDET IP revision %d\n",
346 info->hpdet_ip);
347 case 2:
348 if (!(val & ARIZONA_HP_DONE_B)) {
349 dev_err(arizona->dev, "HPDET did not complete: %x\n",
350 val);
351 return -EAGAIN;
352 }
353
354 val &= ARIZONA_HP_LVL_B_MASK;
355
356 regmap_read(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
357 &range);
358 range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
359 >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
360
361 /* Skip up or down a range? */
362 if (range && (val < arizona_hpdet_c_ranges[range].min)) {
363 range--;
364 dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
365 arizona_hpdet_c_ranges[range].min,
366 arizona_hpdet_c_ranges[range].max);
367 regmap_update_bits(arizona->regmap,
368 ARIZONA_HEADPHONE_DETECT_1,
369 ARIZONA_HP_IMPEDANCE_RANGE_MASK,
370 range <<
371 ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
372 return -EAGAIN;
373 }
374
375 if (range < ARRAY_SIZE(arizona_hpdet_c_ranges) - 1 &&
376 (val >= arizona_hpdet_c_ranges[range].max)) {
377 range++;
378 dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
379 arizona_hpdet_c_ranges[range].min,
380 arizona_hpdet_c_ranges[range].max);
381 regmap_update_bits(arizona->regmap,
382 ARIZONA_HEADPHONE_DETECT_1,
383 ARIZONA_HP_IMPEDANCE_RANGE_MASK,
384 range <<
385 ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
386 return -EAGAIN;
387 }
388 }
389
390 dev_dbg(arizona->dev, "HP impedance %d ohms\n", val);
391 return val;
392}
393
394static int arizona_hpdet_do_id(struct arizona_extcon_info *info, int *reading)
395{
396 struct arizona *arizona = info->arizona;
397 int id_gpio = arizona->pdata.hpdet_id_gpio;
398
399 /*
400 * If we're using HPDET for accessory identification we need
401 * to take multiple measurements, step through them in sequence.
402 */
403 if (arizona->pdata.hpdet_acc_id) {
404 info->hpdet_res[info->num_hpdet_res++] = *reading;
405
406 /*
407 * If the impedence is too high don't measure the
408 * second ground.
409 */
410 if (info->num_hpdet_res == 1 && *reading >= 45) {
411 dev_dbg(arizona->dev, "Skipping ground flip\n");
412 info->hpdet_res[info->num_hpdet_res++] = *reading;
413 }
414
415 if (info->num_hpdet_res == 1) {
416 dev_dbg(arizona->dev, "Flipping ground\n");
417
418 regmap_update_bits(arizona->regmap,
419 ARIZONA_ACCESSORY_DETECT_MODE_1,
420 ARIZONA_ACCDET_SRC,
421 ~info->micd_modes[0].src);
422
423 regmap_update_bits(arizona->regmap,
424 ARIZONA_HEADPHONE_DETECT_1,
425 ARIZONA_HP_POLL, ARIZONA_HP_POLL);
426 return -EAGAIN;
427 }
428
429 /* Only check the mic directly if we didn't already ID it */
430 if (id_gpio && info->num_hpdet_res == 2 &&
431 !((info->hpdet_res[0] > info->hpdet_res[1] * 2))) {
432 dev_dbg(arizona->dev, "Measuring mic\n");
433
434 regmap_update_bits(arizona->regmap,
435 ARIZONA_ACCESSORY_DETECT_MODE_1,
436 ARIZONA_ACCDET_MODE_MASK |
437 ARIZONA_ACCDET_SRC,
438 ARIZONA_ACCDET_MODE_HPR |
439 info->micd_modes[0].src);
440
441 gpio_set_value_cansleep(id_gpio, 1);
442
443 regmap_update_bits(arizona->regmap,
444 ARIZONA_HEADPHONE_DETECT_1,
445 ARIZONA_HP_POLL, ARIZONA_HP_POLL);
446 return -EAGAIN;
447 }
448
449 /* OK, got both. Now, compare... */
450 dev_dbg(arizona->dev, "HPDET measured %d %d %d\n",
451 info->hpdet_res[0], info->hpdet_res[1],
452 info->hpdet_res[2]);
453
454
455 /* Take the headphone impedance for the main report */
456 *reading = info->hpdet_res[0];
457
458 /*
459 * Either the two grounds measure differently or we
460 * measure the mic as high impedance.
461 */
462 if ((info->hpdet_res[0] > info->hpdet_res[1] * 2) ||
463 (id_gpio && info->hpdet_res[2] > 10)) {
464 dev_dbg(arizona->dev, "Detected mic\n");
465 info->mic = true;
466 info->detecting = true;
467 } else {
468 dev_dbg(arizona->dev, "Detected headphone\n");
469 }
470
471 /* Make sure everything is reset back to the real polarity */
472 regmap_update_bits(arizona->regmap,
473 ARIZONA_ACCESSORY_DETECT_MODE_1,
474 ARIZONA_ACCDET_SRC,
475 info->micd_modes[0].src);
476 }
477
478 return 0;
479}
480
481static irqreturn_t arizona_hpdet_irq(int irq, void *data)
482{
483 struct arizona_extcon_info *info = data;
484 struct arizona *arizona = info->arizona;
485 int id_gpio = arizona->pdata.hpdet_id_gpio;
486 int report = ARIZONA_CABLE_HEADPHONE;
487 unsigned int val;
488 int ret, reading;
489
490 mutex_lock(&info->lock);
491
492 /* If we got a spurious IRQ for some reason then ignore it */
493 if (!info->hpdet_active) {
494 dev_warn(arizona->dev, "Spurious HPDET IRQ\n");
495 mutex_unlock(&info->lock);
496 return IRQ_NONE;
497 }
498
499 /* If the cable was removed while measuring ignore the result */
500 ret = extcon_get_cable_state_(&info->edev, ARIZONA_CABLE_MECHANICAL);
501 if (ret < 0) {
502 dev_err(arizona->dev, "Failed to check cable state: %d\n",
503 ret);
504 goto out;
505 } else if (!ret) {
506 dev_dbg(arizona->dev, "Ignoring HPDET for removed cable\n");
507 goto done;
508 }
509
510 ret = arizona_hpdet_read(info);
511 if (ret == -EAGAIN) {
512 goto out;
513 } else if (ret < 0) {
514 goto done;
515 }
516 reading = ret;
517
518 /* Reset back to starting range */
519 regmap_update_bits(arizona->regmap,
520 ARIZONA_HEADPHONE_DETECT_1,
521 ARIZONA_HP_IMPEDANCE_RANGE_MASK | ARIZONA_HP_POLL,
522 0);
523
524 ret = arizona_hpdet_do_id(info, &reading);
525 if (ret == -EAGAIN) {
526 goto out;
527 } else if (ret < 0) {
528 goto done;
529 }
530
531 /* Report high impedence cables as line outputs */
532 if (reading >= 5000)
533 report = ARIZONA_CABLE_LINEOUT;
534 else
535 report = ARIZONA_CABLE_HEADPHONE;
536
537 ret = extcon_set_cable_state_(&info->edev, report, true);
538 if (ret != 0)
539 dev_err(arizona->dev, "Failed to report HP/line: %d\n",
540 ret);
541
542 mutex_lock(&arizona->dapm->card->dapm_mutex);
543
544 ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val);
545 if (ret != 0) {
546 dev_err(arizona->dev, "Failed to read output enables: %d\n",
547 ret);
548 val = 0;
549 }
550
551 if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) {
552 ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, 0);
553 if (ret != 0)
554 dev_warn(arizona->dev, "Failed to undo magic: %d\n",
555 ret);
556
557 ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, 0);
558 if (ret != 0)
559 dev_warn(arizona->dev, "Failed to undo magic: %d\n",
560 ret);
561 }
562
563 mutex_unlock(&arizona->dapm->card->dapm_mutex);
564
565done:
566 if (id_gpio)
567 gpio_set_value_cansleep(id_gpio, 0);
568
569 /* Revert back to MICDET mode */
570 regmap_update_bits(arizona->regmap,
571 ARIZONA_ACCESSORY_DETECT_MODE_1,
572 ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
573
574 /* If we have a mic then reenable MICDET */
575 if (info->mic)
576 arizona_start_mic(info);
577
578 if (info->hpdet_active) {
579 pm_runtime_put_autosuspend(info->dev);
580 info->hpdet_active = false;
581 }
582
583 info->hpdet_done = true;
584
585out:
586 mutex_unlock(&info->lock);
587
588 return IRQ_HANDLED;
589}
590
591static void arizona_identify_headphone(struct arizona_extcon_info *info)
592{
593 struct arizona *arizona = info->arizona;
594 int ret;
595
596 if (info->hpdet_done)
597 return;
598
599 dev_dbg(arizona->dev, "Starting HPDET\n");
600
601 /* Make sure we keep the device enabled during the measurement */
602 pm_runtime_get(info->dev);
603
604 info->hpdet_active = true;
605
606 if (info->mic)
607 arizona_stop_mic(info);
608
609 ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000, 0x4000);
610 if (ret != 0)
611 dev_warn(arizona->dev, "Failed to do magic: %d\n", ret);
612
613 ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000, 0x4000);
614 if (ret != 0)
615 dev_warn(arizona->dev, "Failed to do magic: %d\n", ret);
616
617 ret = regmap_update_bits(arizona->regmap,
618 ARIZONA_ACCESSORY_DETECT_MODE_1,
619 ARIZONA_ACCDET_MODE_MASK,
620 ARIZONA_ACCDET_MODE_HPL);
621 if (ret != 0) {
622 dev_err(arizona->dev, "Failed to set HPDETL mode: %d\n", ret);
623 goto err;
624 }
625
626 ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
627 ARIZONA_HP_POLL, ARIZONA_HP_POLL);
628 if (ret != 0) {
629 dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n",
630 ret);
631 goto err;
632 }
633
634 return;
635
636err:
637 regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
638 ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
639
640 /* Just report headphone */
641 ret = extcon_update_state(&info->edev,
642 1 << ARIZONA_CABLE_HEADPHONE,
643 1 << ARIZONA_CABLE_HEADPHONE);
644 if (ret != 0)
645 dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
646
647 if (info->mic)
648 arizona_start_mic(info);
649
650 info->hpdet_active = false;
651}
652
653static void arizona_start_hpdet_acc_id(struct arizona_extcon_info *info)
654{
655 struct arizona *arizona = info->arizona;
656 unsigned int val;
657 int ret;
658
659 dev_dbg(arizona->dev, "Starting identification via HPDET\n");
660
661 /* Make sure we keep the device enabled during the measurement */
662 pm_runtime_get_sync(info->dev);
663
664 info->hpdet_active = true;
665
666 arizona_extcon_pulse_micbias(info);
667
668 mutex_lock(&arizona->dapm->card->dapm_mutex);
669
670 ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val);
671 if (ret != 0) {
672 dev_err(arizona->dev, "Failed to read output enables: %d\n",
673 ret);
674 val = 0;
675 }
676
677 if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) {
678 ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000,
679 0x4000);
680 if (ret != 0)
681 dev_warn(arizona->dev, "Failed to do magic: %d\n",
682 ret);
683
684 ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000,
685 0x4000);
686 if (ret != 0)
687 dev_warn(arizona->dev, "Failed to do magic: %d\n",
688 ret);
689 }
690
691 mutex_unlock(&arizona->dapm->card->dapm_mutex);
692
693 ret = regmap_update_bits(arizona->regmap,
694 ARIZONA_ACCESSORY_DETECT_MODE_1,
695 ARIZONA_ACCDET_SRC | ARIZONA_ACCDET_MODE_MASK,
696 info->micd_modes[0].src |
697 ARIZONA_ACCDET_MODE_HPL);
698 if (ret != 0) {
699 dev_err(arizona->dev, "Failed to set HPDETL mode: %d\n", ret);
700 goto err;
701 }
702
703 ret = regmap_update_bits(arizona->regmap, ARIZONA_HEADPHONE_DETECT_1,
704 ARIZONA_HP_POLL, ARIZONA_HP_POLL);
705 if (ret != 0) {
706 dev_err(arizona->dev, "Can't start HPDETL measurement: %d\n",
707 ret);
708 goto err;
709 }
710
711 return;
712
713err:
714 regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
715 ARIZONA_ACCDET_MODE_MASK, ARIZONA_ACCDET_MODE_MIC);
716
717 /* Just report headphone */
718 ret = extcon_update_state(&info->edev,
719 1 << ARIZONA_CABLE_HEADPHONE,
720 1 << ARIZONA_CABLE_HEADPHONE);
721 if (ret != 0)
722 dev_err(arizona->dev, "Failed to report headphone: %d\n", ret);
723
724 info->hpdet_active = false;
725}
726
727static irqreturn_t arizona_micdet(int irq, void *data)
728{
729 struct arizona_extcon_info *info = data;
730 struct arizona *arizona = info->arizona;
731 unsigned int val, lvl;
732 int ret, i;
733
734 mutex_lock(&info->lock);
735
736 ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
737 if (ret != 0) {
738 dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
739 mutex_unlock(&info->lock);
740 return IRQ_NONE;
741 }
742
743 dev_dbg(arizona->dev, "MICDET: %x\n", val);
744
745 if (!(val & ARIZONA_MICD_VALID)) {
746 dev_warn(arizona->dev, "Microphone detection state invalid\n");
747 mutex_unlock(&info->lock);
748 return IRQ_NONE;
749 }
750
751 /* Due to jack detect this should never happen */
752 if (!(val & ARIZONA_MICD_STS)) {
753 dev_warn(arizona->dev, "Detected open circuit\n");
754 info->detecting = false;
755 goto handled;
756 }
757
758 /* If we got a high impedence we should have a headset, report it. */
759 if (info->detecting && (val & 0x400)) {
760 arizona_identify_headphone(info);
761
762 ret = extcon_update_state(&info->edev,
763 1 << ARIZONA_CABLE_MICROPHONE,
764 1 << ARIZONA_CABLE_MICROPHONE);
765
766 if (ret != 0)
767 dev_err(arizona->dev, "Headset report failed: %d\n",
768 ret);
769
770 /* Don't need to regulate for button detection */
771 ret = regulator_allow_bypass(info->micvdd, false);
772 if (ret != 0) {
773 dev_err(arizona->dev, "Failed to bypass MICVDD: %d\n",
774 ret);
775 }
776
777 info->mic = true;
778 info->detecting = false;
779 goto handled;
780 }
781
782 /* If we detected a lower impedence during initial startup
783 * then we probably have the wrong polarity, flip it. Don't
784 * do this for the lowest impedences to speed up detection of
785 * plain headphones. If both polarities report a low
786 * impedence then give up and report headphones.
787 */
788 if (info->detecting && (val & 0x3f8)) {
789 if (info->jack_flips >= info->micd_num_modes) {
790 dev_dbg(arizona->dev, "Detected HP/line\n");
791 arizona_identify_headphone(info);
792
793 info->detecting = false;
794
795 arizona_stop_mic(info);
796 } else {
797 info->micd_mode++;
798 if (info->micd_mode == info->micd_num_modes)
799 info->micd_mode = 0;
800 arizona_extcon_set_mode(info, info->micd_mode);
801
802 info->jack_flips++;
803 }
804
805 goto handled;
806 }
807
808 /*
809 * If we're still detecting and we detect a short then we've
810 * got a headphone. Otherwise it's a button press.
811 */
812 if (val & 0x3fc) {
813 if (info->mic) {
814 dev_dbg(arizona->dev, "Mic button detected\n");
815
816 lvl = val & ARIZONA_MICD_LVL_MASK;
817 lvl >>= ARIZONA_MICD_LVL_SHIFT;
818
819 for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
820 if (lvl & arizona_lvl_to_key[i].status)
821 input_report_key(info->input,
822 arizona_lvl_to_key[i].report,
823 1);
824 input_sync(info->input);
825
826 } else if (info->detecting) {
827 dev_dbg(arizona->dev, "Headphone detected\n");
828 info->detecting = false;
829 arizona_stop_mic(info);
830
831 arizona_identify_headphone(info);
832 } else {
833 dev_warn(arizona->dev, "Button with no mic: %x\n",
834 val);
835 }
836 } else {
837 dev_dbg(arizona->dev, "Mic button released\n");
838 for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
839 input_report_key(info->input,
840 arizona_lvl_to_key[i].report, 0);
841 input_sync(info->input);
842 arizona_extcon_pulse_micbias(info);
843 }
844
845handled:
846 pm_runtime_mark_last_busy(info->dev);
847 mutex_unlock(&info->lock);
848
849 return IRQ_HANDLED;
850}
851
852static void arizona_hpdet_work(struct work_struct *work)
853{
854 struct arizona_extcon_info *info = container_of(work,
855 struct arizona_extcon_info,
856 hpdet_work.work);
857
858 mutex_lock(&info->lock);
859 arizona_start_hpdet_acc_id(info);
860 mutex_unlock(&info->lock);
861}
862
863static irqreturn_t arizona_jackdet(int irq, void *data)
864{
865 struct arizona_extcon_info *info = data;
866 struct arizona *arizona = info->arizona;
867 unsigned int val, present, mask;
868 int ret, i;
869
870 pm_runtime_get_sync(info->dev);
871
872 cancel_delayed_work_sync(&info->hpdet_work);
873
874 mutex_lock(&info->lock);
875
876 if (arizona->pdata.jd_gpio5) {
877 mask = ARIZONA_MICD_CLAMP_STS;
878 present = 0;
879 } else {
880 mask = ARIZONA_JD1_STS;
881 present = ARIZONA_JD1_STS;
882 }
883
884 ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
885 if (ret != 0) {
886 dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
887 ret);
888 mutex_unlock(&info->lock);
889 pm_runtime_put_autosuspend(info->dev);
890 return IRQ_NONE;
891 }
892
893 if ((val & mask) == present) {
894 dev_dbg(arizona->dev, "Detected jack\n");
895 ret = extcon_set_cable_state_(&info->edev,
896 ARIZONA_CABLE_MECHANICAL, true);
897
898 if (ret != 0)
899 dev_err(arizona->dev, "Mechanical report failed: %d\n",
900 ret);
901
902 if (!arizona->pdata.hpdet_acc_id) {
903 info->detecting = true;
904 info->mic = false;
905 info->jack_flips = 0;
906
907 arizona_start_mic(info);
908 } else {
909 schedule_delayed_work(&info->hpdet_work,
910 msecs_to_jiffies(250));
911 }
912
913 regmap_update_bits(arizona->regmap,
914 ARIZONA_JACK_DETECT_DEBOUNCE,
915 ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB, 0);
916 } else {
917 dev_dbg(arizona->dev, "Detected jack removal\n");
918
919 arizona_stop_mic(info);
920
921 info->num_hpdet_res = 0;
922 for (i = 0; i < ARRAY_SIZE(info->hpdet_res); i++)
923 info->hpdet_res[i] = 0;
924 info->mic = false;
925 info->hpdet_done = false;
926
927 for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
928 input_report_key(info->input,
929 arizona_lvl_to_key[i].report, 0);
930 input_sync(info->input);
931
932 ret = extcon_update_state(&info->edev, 0xffffffff, 0);
933 if (ret != 0)
934 dev_err(arizona->dev, "Removal report failed: %d\n",
935 ret);
936
937 regmap_update_bits(arizona->regmap,
938 ARIZONA_JACK_DETECT_DEBOUNCE,
939 ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB,
940 ARIZONA_MICD_CLAMP_DB | ARIZONA_JD1_DB);
941 }
942
943 /* Clear trig_sts to make sure DCVDD is not forced up */
944 regmap_write(arizona->regmap, ARIZONA_AOD_WKUP_AND_TRIG,
945 ARIZONA_MICD_CLAMP_FALL_TRIG_STS |
946 ARIZONA_MICD_CLAMP_RISE_TRIG_STS |
947 ARIZONA_JD1_FALL_TRIG_STS |
948 ARIZONA_JD1_RISE_TRIG_STS);
949
950 mutex_unlock(&info->lock);
951
952 pm_runtime_mark_last_busy(info->dev);
953 pm_runtime_put_autosuspend(info->dev);
954
955 return IRQ_HANDLED;
956}
957
958static int arizona_extcon_probe(struct platform_device *pdev)
959{
960 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
961 struct arizona_pdata *pdata;
962 struct arizona_extcon_info *info;
963 int jack_irq_fall, jack_irq_rise;
964 int ret, mode, i;
965
966 if (!arizona->dapm || !arizona->dapm->card)
967 return -EPROBE_DEFER;
968
969 pdata = dev_get_platdata(arizona->dev);
970
971 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
972 if (!info) {
973 dev_err(&pdev->dev, "Failed to allocate memory\n");
974 ret = -ENOMEM;
975 goto err;
976 }
977
978 info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
979 if (IS_ERR(info->micvdd)) {
980 ret = PTR_ERR(info->micvdd);
981 dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
982 goto err;
983 }
984
985 mutex_init(&info->lock);
986 info->arizona = arizona;
987 info->dev = &pdev->dev;
988 INIT_DELAYED_WORK(&info->hpdet_work, arizona_hpdet_work);
989 platform_set_drvdata(pdev, info);
990
991 switch (arizona->type) {
992 case WM5102:
993 switch (arizona->rev) {
994 case 0:
995 info->micd_reva = true;
996 break;
997 default:
998 info->micd_clamp = true;
999 info->hpdet_ip = 1;
1000 break;
1001 }
1002 break;
1003 default:
1004 break;
1005 }
1006
1007 info->edev.name = "Headset Jack";
1008 info->edev.supported_cable = arizona_cable;
1009
1010 ret = extcon_dev_register(&info->edev, arizona->dev);
1011 if (ret < 0) {
1012 dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
1013 ret);
1014 goto err;
1015 }
1016
1017 if (pdata->num_micd_configs) {
1018 info->micd_modes = pdata->micd_configs;
1019 info->micd_num_modes = pdata->num_micd_configs;
1020 } else {
1021 info->micd_modes = micd_default_modes;
1022 info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
1023 }
1024
1025 if (arizona->pdata.micd_pol_gpio > 0) {
1026 if (info->micd_modes[0].gpio)
1027 mode = GPIOF_OUT_INIT_HIGH;
1028 else
1029 mode = GPIOF_OUT_INIT_LOW;
1030
1031 ret = devm_gpio_request_one(&pdev->dev,
1032 arizona->pdata.micd_pol_gpio,
1033 mode,
1034 "MICD polarity");
1035 if (ret != 0) {
1036 dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
1037 arizona->pdata.micd_pol_gpio, ret);
1038 goto err_register;
1039 }
1040 }
1041
1042 if (arizona->pdata.hpdet_id_gpio > 0) {
1043 ret = devm_gpio_request_one(&pdev->dev,
1044 arizona->pdata.hpdet_id_gpio,
1045 GPIOF_OUT_INIT_LOW,
1046 "HPDET");
1047 if (ret != 0) {
1048 dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
1049 arizona->pdata.hpdet_id_gpio, ret);
1050 goto err_register;
1051 }
1052 }
1053
1054 if (arizona->pdata.micd_bias_start_time)
1055 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
1056 ARIZONA_MICD_BIAS_STARTTIME_MASK,
1057 arizona->pdata.micd_bias_start_time
1058 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT);
1059
1060 if (arizona->pdata.micd_rate)
1061 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
1062 ARIZONA_MICD_RATE_MASK,
1063 arizona->pdata.micd_rate
1064 << ARIZONA_MICD_RATE_SHIFT);
1065
1066 if (arizona->pdata.micd_dbtime)
1067 regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
1068 ARIZONA_MICD_DBTIME_MASK,
1069 arizona->pdata.micd_dbtime
1070 << ARIZONA_MICD_DBTIME_SHIFT);
1071
1072 /*
1073 * If we have a clamp use it, activating in conjunction with
1074 * GPIO5 if that is connected for jack detect operation.
1075 */
1076 if (info->micd_clamp) {
1077 if (arizona->pdata.jd_gpio5) {
1078 /* Put the GPIO into input mode */
1079 regmap_write(arizona->regmap, ARIZONA_GPIO5_CTRL,
1080 0xc101);
1081
1082 regmap_update_bits(arizona->regmap,
1083 ARIZONA_MICD_CLAMP_CONTROL,
1084 ARIZONA_MICD_CLAMP_MODE_MASK, 0x9);
1085 } else {
1086 regmap_update_bits(arizona->regmap,
1087 ARIZONA_MICD_CLAMP_CONTROL,
1088 ARIZONA_MICD_CLAMP_MODE_MASK, 0x4);
1089 }
1090
1091 regmap_update_bits(arizona->regmap,
1092 ARIZONA_JACK_DETECT_DEBOUNCE,
1093 ARIZONA_MICD_CLAMP_DB,
1094 ARIZONA_MICD_CLAMP_DB);
1095 }
1096
1097 arizona_extcon_set_mode(info, 0);
1098
1099 info->input = devm_input_allocate_device(&pdev->dev);
1100 if (!info->input) {
1101 dev_err(arizona->dev, "Can't allocate input dev\n");
1102 ret = -ENOMEM;
1103 goto err_register;
1104 }
1105
1106 for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
1107 input_set_capability(info->input, EV_KEY,
1108 arizona_lvl_to_key[i].report);
1109 info->input->name = "Headset";
1110 info->input->phys = "arizona/extcon";
1111 info->input->dev.parent = &pdev->dev;
1112
1113 pm_runtime_enable(&pdev->dev);
1114 pm_runtime_idle(&pdev->dev);
1115 pm_runtime_get_sync(&pdev->dev);
1116
1117 if (arizona->pdata.jd_gpio5) {
1118 jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
1119 jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
1120 } else {
1121 jack_irq_rise = ARIZONA_IRQ_JD_RISE;
1122 jack_irq_fall = ARIZONA_IRQ_JD_FALL;
1123 }
1124
1125 ret = arizona_request_irq(arizona, jack_irq_rise,
1126 "JACKDET rise", arizona_jackdet, info);
1127 if (ret != 0) {
1128 dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
1129 ret);
1130 goto err_input;
1131 }
1132
1133 ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1);
1134 if (ret != 0) {
1135 dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
1136 ret);
1137 goto err_rise;
1138 }
1139
1140 ret = arizona_request_irq(arizona, jack_irq_fall,
1141 "JACKDET fall", arizona_jackdet, info);
1142 if (ret != 0) {
1143 dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
1144 goto err_rise_wake;
1145 }
1146
1147 ret = arizona_set_irq_wake(arizona, jack_irq_fall, 1);
1148 if (ret != 0) {
1149 dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
1150 ret);
1151 goto err_fall;
1152 }
1153
1154 ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
1155 "MICDET", arizona_micdet, info);
1156 if (ret != 0) {
1157 dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
1158 goto err_fall_wake;
1159 }
1160
1161 ret = arizona_request_irq(arizona, ARIZONA_IRQ_HPDET,
1162 "HPDET", arizona_hpdet_irq, info);
1163 if (ret != 0) {
1164 dev_err(&pdev->dev, "Failed to get HPDET IRQ: %d\n", ret);
1165 goto err_micdet;
1166 }
1167
1168 arizona_clk32k_enable(arizona);
1169 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
1170 ARIZONA_JD1_DB, ARIZONA_JD1_DB);
1171 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
1172 ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
1173
1174 ret = regulator_allow_bypass(info->micvdd, true);
1175 if (ret != 0)
1176 dev_warn(arizona->dev, "Failed to set MICVDD to bypass: %d\n",
1177 ret);
1178
1179 pm_runtime_put(&pdev->dev);
1180
1181 ret = input_register_device(info->input);
1182 if (ret) {
1183 dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
1184 goto err_hpdet;
1185 }
1186
1187 return 0;
1188
1189err_hpdet:
1190 arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
1191err_micdet:
1192 arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
1193err_fall_wake:
1194 arizona_set_irq_wake(arizona, jack_irq_fall, 0);
1195err_fall:
1196 arizona_free_irq(arizona, jack_irq_fall, info);
1197err_rise_wake:
1198 arizona_set_irq_wake(arizona, jack_irq_rise, 0);
1199err_rise:
1200 arizona_free_irq(arizona, jack_irq_rise, info);
1201err_input:
1202err_register:
1203 pm_runtime_disable(&pdev->dev);
1204 extcon_dev_unregister(&info->edev);
1205err:
1206 return ret;
1207}
1208
1209static int arizona_extcon_remove(struct platform_device *pdev)
1210{
1211 struct arizona_extcon_info *info = platform_get_drvdata(pdev);
1212 struct arizona *arizona = info->arizona;
1213 int jack_irq_rise, jack_irq_fall;
1214
1215 pm_runtime_disable(&pdev->dev);
1216
1217 regmap_update_bits(arizona->regmap,
1218 ARIZONA_MICD_CLAMP_CONTROL,
1219 ARIZONA_MICD_CLAMP_MODE_MASK, 0);
1220
1221 if (arizona->pdata.jd_gpio5) {
1222 jack_irq_rise = ARIZONA_IRQ_MICD_CLAMP_RISE;
1223 jack_irq_fall = ARIZONA_IRQ_MICD_CLAMP_FALL;
1224 } else {
1225 jack_irq_rise = ARIZONA_IRQ_JD_RISE;
1226 jack_irq_fall = ARIZONA_IRQ_JD_FALL;
1227 }
1228
1229 arizona_set_irq_wake(arizona, jack_irq_rise, 0);
1230 arizona_set_irq_wake(arizona, jack_irq_fall, 0);
1231 arizona_free_irq(arizona, ARIZONA_IRQ_HPDET, info);
1232 arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
1233 arizona_free_irq(arizona, jack_irq_rise, info);
1234 arizona_free_irq(arizona, jack_irq_fall, info);
1235 cancel_delayed_work_sync(&info->hpdet_work);
1236 regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
1237 ARIZONA_JD1_ENA, 0);
1238 arizona_clk32k_disable(arizona);
1239 extcon_dev_unregister(&info->edev);
1240
1241 return 0;
1242}
1243
1244static struct platform_driver arizona_extcon_driver = {
1245 .driver = {
1246 .name = "arizona-extcon",
1247 .owner = THIS_MODULE,
1248 },
1249 .probe = arizona_extcon_probe,
1250 .remove = arizona_extcon_remove,
1251};
1252
1253module_platform_driver(arizona_extcon_driver);
1254
1255MODULE_DESCRIPTION("Arizona Extcon driver");
1256MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
1257MODULE_LICENSE("GPL");
1258MODULE_ALIAS("platform:extcon-arizona");