diff options
Diffstat (limited to 'sound/pci/hda/hda_jack.c')
| -rw-r--r-- | sound/pci/hda/hda_jack.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_jack.c b/sound/pci/hda/hda_jack.c new file mode 100644 index 0000000..64b78a2 --- /dev/null +++ b/sound/pci/hda/hda_jack.c @@ -0,0 +1,148 @@ +/* + * Jack-detection handling for HD-audio + * + * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de> + * + * This driver is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/init.h> +#include <linux/slab.h> +#include <sound/core.h> +#include "hda_codec.h" +#include "hda_local.h" +#include "hda_jack.h" + +/* execute pin sense measurement */ +static u32 read_pin_sense(struct hda_codec *codec, hda_nid_t nid) +{ + u32 pincap; + + if (!codec->no_trigger_sense) { + pincap = snd_hda_query_pin_caps(codec, nid); + if (pincap & AC_PINCAP_TRIG_REQ) /* need trigger? */ + snd_hda_codec_read(codec, nid, 0, + AC_VERB_SET_PIN_SENSE, 0); + } + return snd_hda_codec_read(codec, nid, 0, + AC_VERB_GET_PIN_SENSE, 0); +} + +/** + * snd_hda_jack_tbl_get - query the jack-table entry for the given NID + */ +struct hda_jack_tbl * +snd_hda_jack_tbl_get(struct hda_codec *codec, hda_nid_t nid) +{ + struct hda_jack_tbl *jack = codec->jacktbl.list; + int i; + + if (!nid || !jack) + return NULL; + for (i = 0; i < codec->jacktbl.used; i++, jack++) + if (jack->nid == nid) + return jack; + return NULL; +} +EXPORT_SYMBOL_HDA(snd_hda_jack_tbl_get); + +/** + * snd_hda_jack_tbl_new - create a jack-table entry for the given NID + */ +struct hda_jack_tbl * +snd_hda_jack_tbl_new(struct hda_codec *codec, hda_nid_t nid) +{ + struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid); + if (jack) + return jack; + snd_array_init(&codec->jacktbl, sizeof(*jack), 16); + jack = snd_array_new(&codec->jacktbl); + if (!jack) + return NULL; + jack->nid = nid; + jack->jack_dirty = 1; + return jack; +} + +void snd_hda_jack_tbl_clear(struct hda_codec *codec) +{ + snd_array_free(&codec->jacktbl); +} + +/* update the cached value and notification flag if needed */ +static void jack_detect_update(struct hda_codec *codec, + struct hda_jack_tbl *jack) +{ + if (jack->jack_dirty) { + jack->pin_sense = read_pin_sense(codec, jack->nid); + jack->jack_dirty = 0; + } +} + +/** + * snd_hda_set_dirty_all - Mark all the cached as dirty + * + * This function sets the dirty flag to all entries of jack table. + * It's called from the resume path in hda_codec.c. + */ +void snd_hda_jack_set_dirty_all(struct hda_codec *codec) +{ + struct hda_jack_tbl *jack = codec->jacktbl.list; + int i; + + for (i = 0; i < codec->jacktbl.used; i++, jack++) + if (jack->nid) + jack->jack_dirty = 1; +} +EXPORT_SYMBOL_HDA(snd_hda_jack_set_dirty_all); + +/** + * snd_hda_pin_sense - execute pin sense measurement + * @codec: the CODEC to sense + * @nid: the pin NID to sense + * + * Execute necessary pin sense measurement and return its Presence Detect, + * Impedance, ELD Valid etc. status bits. + */ +u32 snd_hda_pin_sense(struct hda_codec *codec, hda_nid_t nid) +{ + struct hda_jack_tbl *jack = snd_hda_jack_tbl_get(codec, nid); + if (jack) { + jack_detect_update(codec, jack); + return jack->pin_sense; + } + return read_pin_sense(codec, nid); +} +EXPORT_SYMBOL_HDA(snd_hda_pin_sense); + +/** + * snd_hda_jack_detect - query pin Presence Detect status + * @codec: the CODEC to sense + * @nid: the pin NID to sense + * + * Query and return the pin's Presence Detect status. + */ +int snd_hda_jack_detect(struct hda_codec *codec, hda_nid_t nid) +{ + u32 sense = snd_hda_pin_sense(codec, nid); + return !!(sense & AC_PINSENSE_PRESENCE); +} +EXPORT_SYMBOL_HDA(snd_hda_jack_detect); + +/** + * snd_hda_jack_detect_enable - enable the jack-detection + */ +int snd_hda_jack_detect_enable(struct hda_codec *codec, hda_nid_t nid, + unsigned int tag) +{ + struct hda_jack_tbl *jack = snd_hda_jack_tbl_new(codec, nid); + if (!jack) + return -ENOMEM; + return snd_hda_codec_write_cache(codec, nid, 0, + AC_VERB_SET_UNSOLICITED_ENABLE, + AC_USRSP_EN | tag); +} +EXPORT_SYMBOL_HDA(snd_hda_jack_detect_enable); |
