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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/hda/codecs/cmedia.c
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// SPDX-License-Identifier: GPL-2.0-or-later

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/*

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 * Universal codec driver for Intel High Definition Audio Codec

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 *

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 * HD audio codec driver for C-Media CMI9880

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 *

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 * Copyright (c) 2004 Takashi Iwai <[email protected]>

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 */

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#include <linux/init.h>

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#include <linux/slab.h>

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#include <linux/module.h>

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#include <sound/core.h>

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#include <sound/hda_codec.h>

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#include "hda_local.h"

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#include "hda_auto_parser.h"

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#include "hda_jack.h"

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#include "generic.h"

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static int cmedia_probe(struct hda_codec *codec, const struct hda_device_id *id)

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{

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	struct hda_gen_spec *spec;

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	struct auto_pin_cfg *cfg;

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	bool is_cmi8888 = id->vendor_id == 0x13f68888;

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	int err;

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	spec = kzalloc(sizeof(*spec), GFP_KERNEL);

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	if (spec == NULL)

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		return -ENOMEM;

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	codec->spec = spec;

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	cfg = &spec->autocfg;

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	snd_hda_gen_spec_init(spec);

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	if (is_cmi8888) {

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		/* mask NID 0x10 from the playback volume selection;

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		 * it's a headphone boost volume handled manually below

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		 */

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		spec->out_vol_mask = (1ULL << 0x10);

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	}

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	err = snd_hda_parse_pin_defcfg(codec, cfg, NULL, 0);

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	if (err < 0)

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		goto error;

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	err = snd_hda_gen_parse_auto_config(codec, cfg);

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	if (err < 0)

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		goto error;

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	err = snd_hda_parse_pin_defcfg(codec, cfg, NULL, 0);

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	if (err < 0)

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		goto error;

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	err = snd_hda_gen_parse_auto_config(codec, cfg);

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	if (err < 0)

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		goto error;

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	if (is_cmi8888) {

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		if (get_defcfg_device(snd_hda_codec_get_pincfg(codec, 0x10)) ==

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		    AC_JACK_HP_OUT) {

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			static const struct snd_kcontrol_new amp_kctl =

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				HDA_CODEC_VOLUME("Headphone Amp Playback Volume",

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						 0x10, 0, HDA_OUTPUT);

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			if (!snd_hda_gen_add_kctl(spec, NULL, &amp_kctl)) {

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				err = -ENOMEM;

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				goto error;

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			}

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		}

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	}

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	return 0;

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 error:

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	snd_hda_gen_remove(codec);

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	return err;

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}

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static const struct hda_codec_ops cmedia_codec_ops = {

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	.probe = cmedia_probe,

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	.remove = snd_hda_gen_remove,

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	.build_controls = snd_hda_gen_build_controls,

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	.build_pcms = snd_hda_gen_build_pcms,

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	.init = snd_hda_gen_init,

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	.unsol_event = snd_hda_jack_unsol_event,

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	.check_power_status = snd_hda_gen_check_power_status,

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	.stream_pm = snd_hda_gen_stream_pm,

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};

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/*

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 * driver entries

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 */

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static const struct hda_device_id snd_hda_id_cmedia[] = {

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	HDA_CODEC_ID(0x13f68888, "CMI8888"),

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	HDA_CODEC_ID(0x13f69880, "CMI9880"),

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	HDA_CODEC_ID(0x434d4980, "CMI9880"),

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	{} /* terminator */

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};

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MODULE_DEVICE_TABLE(hdaudio, snd_hda_id_cmedia);

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MODULE_LICENSE("GPL");

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MODULE_DESCRIPTION("C-Media HD-audio codec");

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static struct hda_codec_driver cmedia_driver = {

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	.id = snd_hda_id_cmedia,

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	.ops = &cmedia_codec_ops,

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};

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module_hda_codec_driver(cmedia_driver);

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