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Linux/sound/pci/hda/hda_jack.c

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  1 /*
  2  * Jack-detection handling for HD-audio
  3  *
  4  * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
  5  *
  6  * This driver 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 
 12 #include <linux/init.h>
 13 #include <linux/slab.h>
 14 #include <linux/export.h>
 15 #include <sound/core.h>
 16 #include <sound/control.h>
 17 #include <sound/jack.h>
 18 #include "hda_codec.h"
 19 #include "hda_local.h"
 20 #include "hda_auto_parser.h"
 21 #include "hda_jack.h"
 22 
 23 /**
 24  * is_jack_detectable - Check whether the given pin is jack-detectable
 25  * @codec: the HDA codec
 26  * @nid: pin NID
 27  *
 28  * Check whether the given pin is capable to report the jack detection.
 29  * The jack detection might not work by various reasons, e.g. the jack
 30  * detection is prohibited in the codec level, the pin config has
 31  * AC_DEFCFG_MISC_NO_PRESENCE bit, no unsol support, etc.
 32  */
 33 bool is_jack_detectable(struct hda_codec *codec, hda_nid_t nid)
 34 {
 35         if (codec->no_jack_detect)
 36                 return false;
 37         if (!(snd_hda_query_pin_caps(codec, nid) & AC_PINCAP_PRES_DETECT))
 38                 return false;
 39         if (get_defcfg_misc(snd_hda_codec_get_pincfg(codec, nid)) &
 40              AC_DEFCFG_MISC_NO_PRESENCE)
 41                 return false;
 42         if (!(get_wcaps(codec, nid) & AC_WCAP_UNSOL_CAP) &&
 43             !codec->jackpoll_interval)
 44                 return false;
 45         return true;
 46 }
 47 EXPORT_SYMBOL_GPL(is_jack_detectable);
 48 
 49 /* execute pin sense measurement */
 50 static u32 read_pin_sense(struct hda_codec *codec, hda_nid_t nid)
 51 {
 52         u32 pincap;
 53         u32 val;
 54 
 55         if (!codec->no_trigger_sense) {
 56                 pincap = snd_hda_query_pin_caps(codec, nid);
 57                 if (pincap & AC_PINCAP_TRIG_REQ) /* need trigger? */
 58                         snd_hda_codec_read(codec, nid, 0,
 59                                         AC_VERB_SET_PIN_SENSE, 0);
 60         }
 61         val = snd_hda_codec_read(codec, nid, 0,
 62                                   AC_VERB_GET_PIN_SENSE, 0);
 63         if (codec->inv_jack_detect)
 64                 val ^= AC_PINSENSE_PRESENCE;
 65         return val;
 66 }
 67 
 68 /**
 69  * snd_hda_jack_tbl_get - query the jack-table entry for the given NID
 70  * @codec: the HDA codec
 71  * @nid: pin NID to refer to
 72  */
 73 struct hda_jack_tbl *
 74 snd_hda_jack_tbl_get(struct hda_codec *codec, hda_nid_t nid)
 75 {
 76         struct hda_jack_tbl *jack = codec->jacktbl.list;
 77         int i;
 78 
 79         if (!nid || !jack)
 80                 return NULL;
 81         for (i = 0; i < codec->jacktbl.used; i++, jack++)
 82                 if (jack->nid == nid)
 83                         return jack;
 84         return NULL;
 85 }
 86 EXPORT_SYMBOL_GPL(snd_hda_jack_tbl_get);
 87 
 88 /**
 89  * snd_hda_jack_tbl_get_from_tag - query the jack-table entry for the given tag
 90  * @codec: the HDA codec
 91  * @tag: tag value to refer to
 92  */
 93 struct hda_jack_tbl *
 94 snd_hda_jack_tbl_get_from_tag(struct hda_codec *codec, unsigned char tag)
 95 {
 96         struct hda_jack_tbl *jack = codec->jacktbl.list;
 97         int i;
 98 
 99         if (!tag || !jack)
100                 return NULL;
101         for (i = 0; i < codec->jacktbl.used; i++, jack++)
102                 if (jack->tag == tag)
103                         return jack;
104         return NULL;
105 }
106 EXPORT_SYMBOL_GPL(snd_hda_jack_tbl_get_from_tag);
107 
108 /**
109  * snd_hda_jack_tbl_new - create a jack-table entry for the given NID
110  * @codec: the HDA codec
111  * @nid: pin NID to assign
112  */
113 static struct hda_jack_tbl *
114 snd_hda_jack_tbl_new(struct hda_codec *codec, hda_nid_t nid)
115 {
116         struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
117         if (jack)
118                 return jack;
119         jack = snd_array_new(&codec->jacktbl);
120         if (!jack)
121                 return NULL;
122         jack->nid = nid;
123         jack->jack_dirty = 1;
124         jack->tag = codec->jacktbl.used;
125         return jack;
126 }
127 
128 void snd_hda_jack_tbl_clear(struct hda_codec *codec)
129 {
130         struct hda_jack_tbl *jack = codec->jacktbl.list;
131         int i;
132 
133         for (i = 0; i < codec->jacktbl.used; i++, jack++) {
134                 struct hda_jack_callback *cb, *next;
135 #ifdef CONFIG_SND_HDA_INPUT_JACK
136                 /* free jack instances manually when clearing/reconfiguring */
137                 if (!codec->bus->shutdown && jack->jack)
138                         snd_device_free(codec->card, jack->jack);
139 #endif
140                 for (cb = jack->callback; cb; cb = next) {
141                         next = cb->next;
142                         kfree(cb);
143                 }
144         }
145         snd_array_free(&codec->jacktbl);
146 }
147 
148 #define get_jack_plug_state(sense) !!(sense & AC_PINSENSE_PRESENCE)
149 
150 /* update the cached value and notification flag if needed */
151 static void jack_detect_update(struct hda_codec *codec,
152                                struct hda_jack_tbl *jack)
153 {
154         if (!jack->jack_dirty)
155                 return;
156 
157         if (jack->phantom_jack)
158                 jack->pin_sense = AC_PINSENSE_PRESENCE;
159         else
160                 jack->pin_sense = read_pin_sense(codec, jack->nid);
161 
162         /* A gating jack indicates the jack is invalid if gating is unplugged */
163         if (jack->gating_jack && !snd_hda_jack_detect(codec, jack->gating_jack))
164                 jack->pin_sense &= ~AC_PINSENSE_PRESENCE;
165 
166         jack->jack_dirty = 0;
167 
168         /* If a jack is gated by this one update it. */
169         if (jack->gated_jack) {
170                 struct hda_jack_tbl *gated =
171                         snd_hda_jack_tbl_get(codec, jack->gated_jack);
172                 if (gated) {
173                         gated->jack_dirty = 1;
174                         jack_detect_update(codec, gated);
175                 }
176         }
177 }
178 
179 /**
180  * snd_hda_set_dirty_all - Mark all the cached as dirty
181  * @codec: the HDA codec
182  *
183  * This function sets the dirty flag to all entries of jack table.
184  * It's called from the resume path in hda_codec.c.
185  */
186 void snd_hda_jack_set_dirty_all(struct hda_codec *codec)
187 {
188         struct hda_jack_tbl *jack = codec->jacktbl.list;
189         int i;
190 
191         for (i = 0; i < codec->jacktbl.used; i++, jack++)
192                 if (jack->nid)
193                         jack->jack_dirty = 1;
194 }
195 EXPORT_SYMBOL_GPL(snd_hda_jack_set_dirty_all);
196 
197 /**
198  * snd_hda_pin_sense - execute pin sense measurement
199  * @codec: the CODEC to sense
200  * @nid: the pin NID to sense
201  *
202  * Execute necessary pin sense measurement and return its Presence Detect,
203  * Impedance, ELD Valid etc. status bits.
204  */
205 u32 snd_hda_pin_sense(struct hda_codec *codec, hda_nid_t nid)
206 {
207         struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
208         if (jack) {
209                 jack_detect_update(codec, jack);
210                 return jack->pin_sense;
211         }
212         return read_pin_sense(codec, nid);
213 }
214 EXPORT_SYMBOL_GPL(snd_hda_pin_sense);
215 
216 /**
217  * snd_hda_jack_detect_state - query pin Presence Detect status
218  * @codec: the CODEC to sense
219  * @nid: the pin NID to sense
220  *
221  * Query and return the pin's Presence Detect status, as either
222  * HDA_JACK_NOT_PRESENT, HDA_JACK_PRESENT or HDA_JACK_PHANTOM.
223  */
224 int snd_hda_jack_detect_state(struct hda_codec *codec, hda_nid_t nid)
225 {
226         struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid);
227         if (jack && jack->phantom_jack)
228                 return HDA_JACK_PHANTOM;
229         else if (snd_hda_pin_sense(codec, nid) & AC_PINSENSE_PRESENCE)
230                 return HDA_JACK_PRESENT;
231         else
232                 return HDA_JACK_NOT_PRESENT;
233 }
234 EXPORT_SYMBOL_GPL(snd_hda_jack_detect_state);
235 
236 /**
237  * snd_hda_jack_detect_enable - enable the jack-detection
238  * @codec: the HDA codec
239  * @nid: pin NID to enable
240  * @func: callback function to register
241  *
242  * In the case of error, the return value will be a pointer embedded with
243  * errno.  Check and handle the return value appropriately with standard
244  * macros such as @IS_ERR() and @PTR_ERR().
245  */
246 struct hda_jack_callback *
247 snd_hda_jack_detect_enable_callback(struct hda_codec *codec, hda_nid_t nid,
248                                     hda_jack_callback_fn func)
249 {
250         struct hda_jack_tbl *jack;
251         struct hda_jack_callback *callback = NULL;
252         int err;
253 
254         jack = snd_hda_jack_tbl_new(codec, nid);
255         if (!jack)
256                 return ERR_PTR(-ENOMEM);
257         if (func) {
258                 callback = kzalloc(sizeof(*callback), GFP_KERNEL);
259                 if (!callback)
260                         return ERR_PTR(-ENOMEM);
261                 callback->func = func;
262                 callback->nid = jack->nid;
263                 callback->next = jack->callback;
264                 jack->callback = callback;
265         }
266 
267         if (jack->jack_detect)
268                 return callback; /* already registered */
269         jack->jack_detect = 1;
270         if (codec->jackpoll_interval > 0)
271                 return callback; /* No unsol if we're polling instead */
272         err = snd_hda_codec_write_cache(codec, nid, 0,
273                                          AC_VERB_SET_UNSOLICITED_ENABLE,
274                                          AC_USRSP_EN | jack->tag);
275         if (err < 0)
276                 return ERR_PTR(err);
277         return callback;
278 }
279 EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable_callback);
280 
281 /**
282  * snd_hda_jack_detect_enable - Enable the jack detection on the given pin
283  * @codec: the HDA codec
284  * @nid: pin NID to enable jack detection
285  *
286  * Enable the jack detection with the default callback.  Returns zero if
287  * successful or a negative error code.
288  */
289 int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid)
290 {
291         return PTR_ERR_OR_ZERO(snd_hda_jack_detect_enable_callback(codec, nid, NULL));
292 }
293 EXPORT_SYMBOL_GPL(snd_hda_jack_detect_enable);
294 
295 /**
296  * snd_hda_jack_set_gating_jack - Set gating jack.
297  * @codec: the HDA codec
298  * @gated_nid: gated pin NID
299  * @gating_nid: gating pin NID
300  *
301  * Indicates the gated jack is only valid when the gating jack is plugged.
302  */
303 int snd_hda_jack_set_gating_jack(struct hda_codec *codec, hda_nid_t gated_nid,
304                                  hda_nid_t gating_nid)
305 {
306         struct hda_jack_tbl *gated = snd_hda_jack_tbl_new(codec, gated_nid);
307         struct hda_jack_tbl *gating = snd_hda_jack_tbl_new(codec, gating_nid);
308 
309         if (!gated || !gating)
310                 return -EINVAL;
311 
312         gated->gating_jack = gating_nid;
313         gating->gated_jack = gated_nid;
314 
315         return 0;
316 }
317 EXPORT_SYMBOL_GPL(snd_hda_jack_set_gating_jack);
318 
319 /**
320  * snd_hda_jack_report_sync - sync the states of all jacks and report if changed
321  * @codec: the HDA codec
322  */
323 void snd_hda_jack_report_sync(struct hda_codec *codec)
324 {
325         struct hda_jack_tbl *jack;
326         int i, state;
327 
328         /* update all jacks at first */
329         jack = codec->jacktbl.list;
330         for (i = 0; i < codec->jacktbl.used; i++, jack++)
331                 if (jack->nid)
332                         jack_detect_update(codec, jack);
333 
334         /* report the updated jacks; it's done after updating all jacks
335          * to make sure that all gating jacks properly have been set
336          */
337         jack = codec->jacktbl.list;
338         for (i = 0; i < codec->jacktbl.used; i++, jack++)
339                 if (jack->nid) {
340                         if (!jack->kctl || jack->block_report)
341                                 continue;
342                         state = get_jack_plug_state(jack->pin_sense);
343                         snd_kctl_jack_report(codec->card, jack->kctl, state);
344 #ifdef CONFIG_SND_HDA_INPUT_JACK
345                         if (jack->jack)
346                                 snd_jack_report(jack->jack,
347                                                 state ? jack->type : 0);
348 #endif
349                 }
350 }
351 EXPORT_SYMBOL_GPL(snd_hda_jack_report_sync);
352 
353 #ifdef CONFIG_SND_HDA_INPUT_JACK
354 /* guess the jack type from the pin-config */
355 static int get_input_jack_type(struct hda_codec *codec, hda_nid_t nid)
356 {
357         unsigned int def_conf = snd_hda_codec_get_pincfg(codec, nid);
358         switch (get_defcfg_device(def_conf)) {
359         case AC_JACK_LINE_OUT:
360         case AC_JACK_SPEAKER:
361                 return SND_JACK_LINEOUT;
362         case AC_JACK_HP_OUT:
363                 return SND_JACK_HEADPHONE;
364         case AC_JACK_SPDIF_OUT:
365         case AC_JACK_DIG_OTHER_OUT:
366                 return SND_JACK_AVOUT;
367         case AC_JACK_MIC_IN:
368                 return SND_JACK_MICROPHONE;
369         default:
370                 return SND_JACK_LINEIN;
371         }
372 }
373 
374 static void hda_free_jack_priv(struct snd_jack *jack)
375 {
376         struct hda_jack_tbl *jacks = jack->private_data;
377         jacks->nid = 0;
378         jacks->jack = NULL;
379 }
380 #endif
381 
382 /**
383  * snd_hda_jack_add_kctl - Add a kctl for the given pin
384  * @codec: the HDA codec
385  * @nid: pin NID to assign
386  * @name: string name for the jack
387  * @idx: index number for the jack
388  * @phantom_jack: flag to deal as a phantom jack
389  *
390  * This assigns a jack-detection kctl to the given pin.  The kcontrol
391  * will have the given name and index.
392  */
393 static int __snd_hda_jack_add_kctl(struct hda_codec *codec, hda_nid_t nid,
394                           const char *name, int idx, bool phantom_jack)
395 {
396         struct hda_jack_tbl *jack;
397         struct snd_kcontrol *kctl;
398         int err, state;
399 
400         jack = snd_hda_jack_tbl_new(codec, nid);
401         if (!jack)
402                 return 0;
403         if (jack->kctl)
404                 return 0; /* already created */
405         kctl = snd_kctl_jack_new(name, idx, codec);
406         if (!kctl)
407                 return -ENOMEM;
408         err = snd_hda_ctl_add(codec, nid, kctl);
409         if (err < 0)
410                 return err;
411         jack->kctl = kctl;
412         jack->phantom_jack = !!phantom_jack;
413 
414         state = snd_hda_jack_detect(codec, nid);
415         snd_kctl_jack_report(codec->card, kctl, state);
416 #ifdef CONFIG_SND_HDA_INPUT_JACK
417         if (!phantom_jack) {
418                 jack->type = get_input_jack_type(codec, nid);
419                 err = snd_jack_new(codec->card, name, jack->type,
420                                    &jack->jack);
421                 if (err < 0)
422                         return err;
423                 jack->jack->private_data = jack;
424                 jack->jack->private_free = hda_free_jack_priv;
425                 snd_jack_report(jack->jack, state ? jack->type : 0);
426         }
427 #endif
428         return 0;
429 }
430 
431 /**
432  * snd_hda_jack_add_kctl - Add a jack kctl for the given pin
433  * @codec: the HDA codec
434  * @nid: pin NID
435  * @name: the name string for the jack ctl
436  * @idx: the ctl index for the jack ctl
437  *
438  * This is a simple helper calling __snd_hda_jack_add_kctl().
439  */
440 int snd_hda_jack_add_kctl(struct hda_codec *codec, hda_nid_t nid,
441                           const char *name, int idx)
442 {
443         return __snd_hda_jack_add_kctl(codec, nid, name, idx, false);
444 }
445 EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctl);
446 
447 /* get the unique index number for the given kctl name */
448 static int get_unique_index(struct hda_codec *codec, const char *name, int idx)
449 {
450         struct hda_jack_tbl *jack;
451         int i, len = strlen(name);
452  again:
453         jack = codec->jacktbl.list;
454         for (i = 0; i < codec->jacktbl.used; i++, jack++) {
455                 /* jack->kctl.id contains "XXX Jack" name string with index */
456                 if (jack->kctl &&
457                     !strncmp(name, jack->kctl->id.name, len) &&
458                     !strcmp(" Jack", jack->kctl->id.name + len) &&
459                     jack->kctl->id.index == idx) {
460                         idx++;
461                         goto again;
462                 }
463         }
464         return idx;
465 }
466 
467 static int add_jack_kctl(struct hda_codec *codec, hda_nid_t nid,
468                          const struct auto_pin_cfg *cfg,
469                          const char *base_name)
470 {
471         unsigned int def_conf, conn;
472         char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
473         int idx, err;
474         bool phantom_jack;
475 
476         if (!nid)
477                 return 0;
478         def_conf = snd_hda_codec_get_pincfg(codec, nid);
479         conn = get_defcfg_connect(def_conf);
480         if (conn == AC_JACK_PORT_NONE)
481                 return 0;
482         phantom_jack = (conn != AC_JACK_PORT_COMPLEX) ||
483                        !is_jack_detectable(codec, nid);
484 
485         if (base_name) {
486                 strlcpy(name, base_name, sizeof(name));
487                 idx = 0;
488         } else
489                 snd_hda_get_pin_label(codec, nid, cfg, name, sizeof(name), &idx);
490         if (phantom_jack)
491                 /* Example final name: "Internal Mic Phantom Jack" */
492                 strncat(name, " Phantom", sizeof(name) - strlen(name) - 1);
493         idx = get_unique_index(codec, name, idx);
494         err = __snd_hda_jack_add_kctl(codec, nid, name, idx, phantom_jack);
495         if (err < 0)
496                 return err;
497 
498         if (!phantom_jack)
499                 return snd_hda_jack_detect_enable(codec, nid);
500         return 0;
501 }
502 
503 /**
504  * snd_hda_jack_add_kctls - Add kctls for all pins included in the given pincfg
505  * @codec: the HDA codec
506  * @cfg: pin config table to parse
507  */
508 int snd_hda_jack_add_kctls(struct hda_codec *codec,
509                            const struct auto_pin_cfg *cfg)
510 {
511         const hda_nid_t *p;
512         int i, err;
513 
514         for (i = 0; i < cfg->num_inputs; i++) {
515                 /* If we have headphone mics; make sure they get the right name
516                    before grabbed by output pins */
517                 if (cfg->inputs[i].is_headphone_mic) {
518                         if (auto_cfg_hp_outs(cfg) == 1)
519                                 err = add_jack_kctl(codec, auto_cfg_hp_pins(cfg)[0],
520                                                     cfg, "Headphone Mic");
521                         else
522                                 err = add_jack_kctl(codec, cfg->inputs[i].pin,
523                                                     cfg, "Headphone Mic");
524                 } else
525                         err = add_jack_kctl(codec, cfg->inputs[i].pin, cfg,
526                                             NULL);
527                 if (err < 0)
528                         return err;
529         }
530 
531         for (i = 0, p = cfg->line_out_pins; i < cfg->line_outs; i++, p++) {
532                 err = add_jack_kctl(codec, *p, cfg, NULL);
533                 if (err < 0)
534                         return err;
535         }
536         for (i = 0, p = cfg->hp_pins; i < cfg->hp_outs; i++, p++) {
537                 if (*p == *cfg->line_out_pins) /* might be duplicated */
538                         break;
539                 err = add_jack_kctl(codec, *p, cfg, NULL);
540                 if (err < 0)
541                         return err;
542         }
543         for (i = 0, p = cfg->speaker_pins; i < cfg->speaker_outs; i++, p++) {
544                 if (*p == *cfg->line_out_pins) /* might be duplicated */
545                         break;
546                 err = add_jack_kctl(codec, *p, cfg, NULL);
547                 if (err < 0)
548                         return err;
549         }
550         for (i = 0, p = cfg->dig_out_pins; i < cfg->dig_outs; i++, p++) {
551                 err = add_jack_kctl(codec, *p, cfg, NULL);
552                 if (err < 0)
553                         return err;
554         }
555         err = add_jack_kctl(codec, cfg->dig_in_pin, cfg, NULL);
556         if (err < 0)
557                 return err;
558         err = add_jack_kctl(codec, cfg->mono_out_pin, cfg, NULL);
559         if (err < 0)
560                 return err;
561         return 0;
562 }
563 EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctls);
564 
565 static void call_jack_callback(struct hda_codec *codec,
566                                struct hda_jack_tbl *jack)
567 {
568         struct hda_jack_callback *cb;
569 
570         for (cb = jack->callback; cb; cb = cb->next)
571                 cb->func(codec, cb);
572         if (jack->gated_jack) {
573                 struct hda_jack_tbl *gated =
574                         snd_hda_jack_tbl_get(codec, jack->gated_jack);
575                 if (gated) {
576                         for (cb = gated->callback; cb; cb = cb->next)
577                                 cb->func(codec, cb);
578                 }
579         }
580 }
581 
582 /**
583  * snd_hda_jack_unsol_event - Handle an unsolicited event
584  * @codec: the HDA codec
585  * @res: the unsolicited event data
586  */
587 void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res)
588 {
589         struct hda_jack_tbl *event;
590         int tag = (res >> AC_UNSOL_RES_TAG_SHIFT) & 0x7f;
591 
592         event = snd_hda_jack_tbl_get_from_tag(codec, tag);
593         if (!event)
594                 return;
595         event->jack_dirty = 1;
596 
597         call_jack_callback(codec, event);
598         snd_hda_jack_report_sync(codec);
599 }
600 EXPORT_SYMBOL_GPL(snd_hda_jack_unsol_event);
601 
602 /**
603  * snd_hda_jack_poll_all - Poll all jacks
604  * @codec: the HDA codec
605  *
606  * Poll all detectable jacks with dirty flag, update the status, call
607  * callbacks and call snd_hda_jack_report_sync() if any changes are found.
608  */
609 void snd_hda_jack_poll_all(struct hda_codec *codec)
610 {
611         struct hda_jack_tbl *jack = codec->jacktbl.list;
612         int i, changes = 0;
613 
614         for (i = 0; i < codec->jacktbl.used; i++, jack++) {
615                 unsigned int old_sense;
616                 if (!jack->nid || !jack->jack_dirty || jack->phantom_jack)
617                         continue;
618                 old_sense = get_jack_plug_state(jack->pin_sense);
619                 jack_detect_update(codec, jack);
620                 if (old_sense == get_jack_plug_state(jack->pin_sense))
621                         continue;
622                 changes = 1;
623                 call_jack_callback(codec, jack);
624         }
625         if (changes)
626                 snd_hda_jack_report_sync(codec);
627 }
628 EXPORT_SYMBOL_GPL(snd_hda_jack_poll_all);
629 
630 

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