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TOMOYO Linux Cross Reference
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 
136                 /* free jack instances manually when clearing/reconfiguring */
137                 if (!codec->bus->shutdown && jack->jack)
138                         snd_device_free(codec->card, jack->jack);
139 
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->jack || jack->block_report)
341                                 continue;
342                         state = get_jack_plug_state(jack->pin_sense);
343                         snd_jack_report(jack->jack,
344                                         state ? jack->type : 0);
345                 }
346 }
347 EXPORT_SYMBOL_GPL(snd_hda_jack_report_sync);
348 
349 /* guess the jack type from the pin-config */
350 static int get_input_jack_type(struct hda_codec *codec, hda_nid_t nid)
351 {
352         unsigned int def_conf = snd_hda_codec_get_pincfg(codec, nid);
353         switch (get_defcfg_device(def_conf)) {
354         case AC_JACK_LINE_OUT:
355         case AC_JACK_SPEAKER:
356                 return SND_JACK_LINEOUT;
357         case AC_JACK_HP_OUT:
358                 return SND_JACK_HEADPHONE;
359         case AC_JACK_SPDIF_OUT:
360         case AC_JACK_DIG_OTHER_OUT:
361                 return SND_JACK_AVOUT;
362         case AC_JACK_MIC_IN:
363                 return SND_JACK_MICROPHONE;
364         default:
365                 return SND_JACK_LINEIN;
366         }
367 }
368 
369 static void hda_free_jack_priv(struct snd_jack *jack)
370 {
371         struct hda_jack_tbl *jacks = jack->private_data;
372         jacks->nid = 0;
373         jacks->jack = NULL;
374 }
375 
376 /**
377  * snd_hda_jack_add_kctl - Add a kctl for the given pin
378  * @codec: the HDA codec
379  * @nid: pin NID to assign
380  * @name: string name for the jack
381  * @phantom_jack: flag to deal as a phantom jack
382  *
383  * This assigns a jack-detection kctl to the given pin.  The kcontrol
384  * will have the given name and index.
385  */
386 int snd_hda_jack_add_kctl(struct hda_codec *codec, hda_nid_t nid,
387                           const char *name, bool phantom_jack)
388 {
389         struct hda_jack_tbl *jack;
390         int err, state, type;
391 
392         jack = snd_hda_jack_tbl_new(codec, nid);
393         if (!jack)
394                 return 0;
395         if (jack->jack)
396                 return 0; /* already created */
397 
398         type = get_input_jack_type(codec, nid);
399         err = snd_jack_new(codec->card, name, type,
400                            &jack->jack, true, phantom_jack);
401         if (err < 0)
402                 return err;
403 
404         jack->phantom_jack = !!phantom_jack;
405         jack->type = type;
406         jack->jack->private_data = jack;
407         jack->jack->private_free = hda_free_jack_priv;
408         state = snd_hda_jack_detect(codec, nid);
409         snd_jack_report(jack->jack, state ? jack->type : 0);
410 
411         return 0;
412 }
413 EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctl);
414 
415 static int add_jack_kctl(struct hda_codec *codec, hda_nid_t nid,
416                          const struct auto_pin_cfg *cfg,
417                          const char *base_name)
418 {
419         unsigned int def_conf, conn;
420         char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
421         int err;
422         bool phantom_jack;
423 
424         if (!nid)
425                 return 0;
426         def_conf = snd_hda_codec_get_pincfg(codec, nid);
427         conn = get_defcfg_connect(def_conf);
428         if (conn == AC_JACK_PORT_NONE)
429                 return 0;
430         phantom_jack = (conn != AC_JACK_PORT_COMPLEX) ||
431                        !is_jack_detectable(codec, nid);
432 
433         if (base_name)
434                 strlcpy(name, base_name, sizeof(name));
435         else
436                 snd_hda_get_pin_label(codec, nid, cfg, name, sizeof(name), NULL);
437         if (phantom_jack)
438                 /* Example final name: "Internal Mic Phantom Jack" */
439                 strncat(name, " Phantom", sizeof(name) - strlen(name) - 1);
440         err = snd_hda_jack_add_kctl(codec, nid, name, phantom_jack);
441         if (err < 0)
442                 return err;
443 
444         if (!phantom_jack)
445                 return snd_hda_jack_detect_enable(codec, nid);
446         return 0;
447 }
448 
449 /**
450  * snd_hda_jack_add_kctls - Add kctls for all pins included in the given pincfg
451  * @codec: the HDA codec
452  * @cfg: pin config table to parse
453  */
454 int snd_hda_jack_add_kctls(struct hda_codec *codec,
455                            const struct auto_pin_cfg *cfg)
456 {
457         const hda_nid_t *p;
458         int i, err;
459 
460         for (i = 0; i < cfg->num_inputs; i++) {
461                 /* If we have headphone mics; make sure they get the right name
462                    before grabbed by output pins */
463                 if (cfg->inputs[i].is_headphone_mic) {
464                         if (auto_cfg_hp_outs(cfg) == 1)
465                                 err = add_jack_kctl(codec, auto_cfg_hp_pins(cfg)[0],
466                                                     cfg, "Headphone Mic");
467                         else
468                                 err = add_jack_kctl(codec, cfg->inputs[i].pin,
469                                                     cfg, "Headphone Mic");
470                 } else
471                         err = add_jack_kctl(codec, cfg->inputs[i].pin, cfg,
472                                             NULL);
473                 if (err < 0)
474                         return err;
475         }
476 
477         for (i = 0, p = cfg->line_out_pins; i < cfg->line_outs; i++, p++) {
478                 err = add_jack_kctl(codec, *p, cfg, NULL);
479                 if (err < 0)
480                         return err;
481         }
482         for (i = 0, p = cfg->hp_pins; i < cfg->hp_outs; i++, p++) {
483                 if (*p == *cfg->line_out_pins) /* might be duplicated */
484                         break;
485                 err = add_jack_kctl(codec, *p, cfg, NULL);
486                 if (err < 0)
487                         return err;
488         }
489         for (i = 0, p = cfg->speaker_pins; i < cfg->speaker_outs; i++, p++) {
490                 if (*p == *cfg->line_out_pins) /* might be duplicated */
491                         break;
492                 err = add_jack_kctl(codec, *p, cfg, NULL);
493                 if (err < 0)
494                         return err;
495         }
496         for (i = 0, p = cfg->dig_out_pins; i < cfg->dig_outs; i++, p++) {
497                 err = add_jack_kctl(codec, *p, cfg, NULL);
498                 if (err < 0)
499                         return err;
500         }
501         err = add_jack_kctl(codec, cfg->dig_in_pin, cfg, NULL);
502         if (err < 0)
503                 return err;
504         err = add_jack_kctl(codec, cfg->mono_out_pin, cfg, NULL);
505         if (err < 0)
506                 return err;
507         return 0;
508 }
509 EXPORT_SYMBOL_GPL(snd_hda_jack_add_kctls);
510 
511 static void call_jack_callback(struct hda_codec *codec,
512                                struct hda_jack_tbl *jack)
513 {
514         struct hda_jack_callback *cb;
515 
516         for (cb = jack->callback; cb; cb = cb->next)
517                 cb->func(codec, cb);
518         if (jack->gated_jack) {
519                 struct hda_jack_tbl *gated =
520                         snd_hda_jack_tbl_get(codec, jack->gated_jack);
521                 if (gated) {
522                         for (cb = gated->callback; cb; cb = cb->next)
523                                 cb->func(codec, cb);
524                 }
525         }
526 }
527 
528 /**
529  * snd_hda_jack_unsol_event - Handle an unsolicited event
530  * @codec: the HDA codec
531  * @res: the unsolicited event data
532  */
533 void snd_hda_jack_unsol_event(struct hda_codec *codec, unsigned int res)
534 {
535         struct hda_jack_tbl *event;
536         int tag = (res >> AC_UNSOL_RES_TAG_SHIFT) & 0x7f;
537 
538         event = snd_hda_jack_tbl_get_from_tag(codec, tag);
539         if (!event)
540                 return;
541         event->jack_dirty = 1;
542 
543         call_jack_callback(codec, event);
544         snd_hda_jack_report_sync(codec);
545 }
546 EXPORT_SYMBOL_GPL(snd_hda_jack_unsol_event);
547 
548 /**
549  * snd_hda_jack_poll_all - Poll all jacks
550  * @codec: the HDA codec
551  *
552  * Poll all detectable jacks with dirty flag, update the status, call
553  * callbacks and call snd_hda_jack_report_sync() if any changes are found.
554  */
555 void snd_hda_jack_poll_all(struct hda_codec *codec)
556 {
557         struct hda_jack_tbl *jack = codec->jacktbl.list;
558         int i, changes = 0;
559 
560         for (i = 0; i < codec->jacktbl.used; i++, jack++) {
561                 unsigned int old_sense;
562                 if (!jack->nid || !jack->jack_dirty || jack->phantom_jack)
563                         continue;
564                 old_sense = get_jack_plug_state(jack->pin_sense);
565                 jack_detect_update(codec, jack);
566                 if (old_sense == get_jack_plug_state(jack->pin_sense))
567                         continue;
568                 changes = 1;
569                 call_jack_callback(codec, jack);
570         }
571         if (changes)
572                 snd_hda_jack_report_sync(codec);
573 }
574 EXPORT_SYMBOL_GPL(snd_hda_jack_poll_all);
575 
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