pci/hda/hda_beep.c

24 static void generate_tone(struct hda_beep *beep, int tone)
26 	struct hda_codec *codec = beep->codec;
28 	if (tone && !beep->playing) {
30 		if (beep->power_hook)
31 			beep->power_hook(beep, true);
32 		beep->playing = 1;
34 	snd_hda_codec_write(codec, beep->nid, 0,
36 	if (!tone && beep->playing) {
37 		beep->playing = 0;
38 		if (beep->power_hook)
39 			beep->power_hook(beep, false);
46 	struct hda_beep *beep =
49 	if (beep->enabled)
50 		generate_tone(beep, beep->tone);
53 /* (non-standard) Linear beep tone calculation for IDT/STAC codecs
55  * The tone frequency of beep generator on IDT/STAC codecs is
60 static int beep_linear_tone(struct hda_beep *beep, int hz)
68 		hz = 0; /* turn off PC beep*/
78 /* HD-audio standard beep tone parameter calculation
84 static int beep_standard_tone(struct hda_beep *beep, int hz)
99 	struct hda_beep *beep = input_get_drvdata(dev);
107 		if (beep->linear_tone)
108 			beep->tone = beep_linear_tone(beep, hz);
110 			beep->tone = beep_standard_tone(beep, hz);
116 	/* schedule beep event */
117 	schedule_work(&beep->beep_work);
121 static void turn_on_beep(struct hda_beep *beep)
123 	if (beep->keep_power_at_enable)
124 		snd_hda_power_up_pm(beep->codec);
127 static void turn_off_beep(struct hda_beep *beep)
129 	cancel_work_sync(&beep->beep_work);
130 	if (beep->playing) {
131 		/* turn off beep */
132 		generate_tone(beep, 0);
134 	if (beep->keep_power_at_enable)
135 		snd_hda_power_down_pm(beep->codec);
139  * snd_hda_enable_beep_device - Turn on/off beep sound
145 	struct hda_beep *beep = codec->beep;
146 	if (!beep)
149 	if (beep->enabled != enable) {
150 		beep->enabled = enable;
152 			turn_on_beep(beep);
154 			turn_off_beep(beep);
163 	struct hda_beep *beep = device->device_data;
166 	err = input_register_device(beep->dev);
168 		beep->registered = true;
174 	struct hda_beep *beep = device->device_data;
176 	if (beep->registered)
177 		input_unregister_device(beep->dev);
179 		input_free_device(beep->dev);
180 	if (beep->enabled)
181 		turn_off_beep(beep);
187 	struct hda_beep *beep = device->device_data;
189 	beep->codec->beep = NULL;
190 	kfree(beep);
195  * snd_hda_attach_beep_device - Attach a beep input device
197  * @nid: beep NID
199  * Attach a beep object to the given widget.  If beep hint is turned off
202  * Currently, only one beep device is allowed to each codec.
212 	struct hda_beep *beep;
215 	if (!snd_hda_get_bool_hint(codec, "beep"))
220 	beep = kzalloc(sizeof(*beep), GFP_KERNEL);
221 	if (beep == NULL)
223 	snprintf(beep->phys, sizeof(beep->phys),
229 	beep->nid = nid;
230 	beep->codec = codec;
231 	codec->beep = beep;
233 	INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
241 	/* setup digital beep device */
243 	input_dev->phys = beep->phys;
254 	input_set_drvdata(input_dev, beep);
256 	beep->dev = input_dev;
258 	err = snd_device_new(codec->card, SNDRV_DEV_JACK, beep, &ops);
265 	input_free_device(beep->dev);
267 	kfree(beep);
268 	codec->beep = NULL;
274  * snd_hda_detach_beep_device - Detach the beep device
279 	if (!codec->bus->shutdown && codec->beep)
280 		snd_device_free(codec->card, codec->beep);
291 /* get/put callbacks for beep mute mixer switches */
294  * snd_hda_mixer_amp_switch_get_beep - Get callback for beep controls
302 	struct hda_beep *beep = codec->beep;
305 	if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) {
307 			ucontrol->value.integer.value[0] = beep->enabled;
309 			ucontrol->value.integer.value[1] = beep->enabled;
317  * snd_hda_mixer_amp_switch_put_beep - Put callback for beep controls
325 	struct hda_beep *beep = codec->beep;
326 	if (beep) {