1 // SPDX-License-Identifier: GPL-2.0+
3  * Digital Beep Input Interface for HD-audio codec
18 	DIGBEEP_HZ_STEP = 46875,	/* 46.875 Hz */
19 	DIGBEEP_HZ_MIN = 93750,		/* 93.750 Hz */
26 	struct hda_codec *codec = beep->codec;  in generate_tone()
28 	if (tone && !beep->playing) {  in generate_tone()
30 		if (beep->power_hook)  in generate_tone()
31 			beep->power_hook(beep, true);  in generate_tone()
32 		beep->playing = 1;  in generate_tone()
34 	snd_hda_codec_write(codec, beep->nid, 0,  in generate_tone()
36 	if (!tone && beep->playing) {  in generate_tone()
37 		beep->playing = 0;  in generate_tone()
38 		if (beep->power_hook)  in generate_tone()
39 			beep->power_hook(beep, false);  in generate_tone()
49 	if (beep->enabled)  in snd_hda_generate_beep()
50 		generate_tone(beep, beep->tone);  in snd_hda_generate_beep()
53 /* (non-standard) Linear beep tone calculation for IDT/STAC codecs 
55  * The tone frequency of beep generator on IDT/STAC codecs is
56  * defined from the 8bit tone parameter, in Hz,
57  *    freq = 48000 * (257 - tone) / 1024
58  * that is from 12kHz to 93.75Hz in steps of 46.875 Hz
60 static int beep_linear_tone(struct hda_beep *beep, int hz)  in beep_linear_tone()  argument
62 	if (hz <= 0)  in beep_linear_tone()
64 	hz *= 1000; /* fixed point */  in beep_linear_tone()
65 	hz = hz - DIGBEEP_HZ_MIN  in beep_linear_tone()
67 	if (hz < 0)  in beep_linear_tone()
68 		hz = 0; /* turn off PC beep*/  in beep_linear_tone()
69 	else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))  in beep_linear_tone()
70 		hz = 1; /* max frequency */  in beep_linear_tone()
72 		hz /= DIGBEEP_HZ_STEP;  in beep_linear_tone()
73 		hz = 255 - hz;  in beep_linear_tone()
75 	return hz;  in beep_linear_tone()
78 /* HD-audio standard beep tone parameter calculation
80  * The tone frequency in Hz is calculated as
82  * from 47Hz to 12kHz
84 static int beep_standard_tone(struct hda_beep *beep, int hz)  in beep_standard_tone()  argument
86 	if (hz <= 0)  in beep_standard_tone()
88 	hz = 12000 / hz;  in beep_standard_tone()
89 	if (hz > 0xff)  in beep_standard_tone()
91 	if (hz <= 0)  in beep_standard_tone()
93 	return hz;  in beep_standard_tone()
97 				unsigned int code, int hz)  in snd_hda_beep_event()  argument
101 	switch (code) {  in snd_hda_beep_event()
103 		if (hz)  in snd_hda_beep_event()
104 			hz = 1000;  in snd_hda_beep_event()
107 		if (beep->linear_tone)  in snd_hda_beep_event()
108 			beep->tone = beep_linear_tone(beep, hz);  in snd_hda_beep_event()
110 			beep->tone = beep_standard_tone(beep, hz);  in snd_hda_beep_event()
113 		return -1;  in snd_hda_beep_event()
117 	schedule_work(&beep->beep_work);  in snd_hda_beep_event()
123 	cancel_work_sync(&beep->beep_work);  in turn_off_beep()
124 	if (beep->playing) {  in turn_off_beep()
131  * snd_hda_enable_beep_device - Turn on/off beep sound
137 	struct hda_beep *beep = codec->beep;  in snd_hda_enable_beep_device()
141 	if (beep->enabled != enable) {  in snd_hda_enable_beep_device()
142 		beep->enabled = enable;  in snd_hda_enable_beep_device()
153 	struct hda_beep *beep = device->device_data;  in beep_dev_register()
156 	err = input_register_device(beep->dev);  in beep_dev_register()
158 		beep->registered = true;  in beep_dev_register()
164 	struct hda_beep *beep = device->device_data;  in beep_dev_disconnect()
166 	if (beep->registered)  in beep_dev_disconnect()
167 		input_unregister_device(beep->dev);  in beep_dev_disconnect()
169 		input_free_device(beep->dev);  in beep_dev_disconnect()
176 	struct hda_beep *beep = device->device_data;  in beep_dev_free()
178 	beep->codec->beep = NULL;  in beep_dev_free()
184  * snd_hda_attach_beep_device - Attach a beep input device
206 	if (codec->beep_mode == HDA_BEEP_MODE_OFF)  in snd_hda_attach_beep_device()
211 		return -ENOMEM;  in snd_hda_attach_beep_device()
212 	snprintf(beep->phys, sizeof(beep->phys),  in snd_hda_attach_beep_device()
213 		"card%d/codec#%d/beep0", codec->card->number, codec->addr);  in snd_hda_attach_beep_device()
218 	beep->nid = nid;  in snd_hda_attach_beep_device()
219 	beep->codec = codec;  in snd_hda_attach_beep_device()
220 	codec->beep = beep;  in snd_hda_attach_beep_device()
222 	INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);  in snd_hda_attach_beep_device()
223 	mutex_init(&beep->mutex);  in snd_hda_attach_beep_device()
227 		err = -ENOMEM;  in snd_hda_attach_beep_device()
232 	input_dev->name = "HDA Digital PCBeep";  in snd_hda_attach_beep_device()
233 	input_dev->phys = beep->phys;  in snd_hda_attach_beep_device()
234 	input_dev->id.bustype = BUS_PCI;  in snd_hda_attach_beep_device()
235 	input_dev->dev.parent = &codec->card->card_dev;  in snd_hda_attach_beep_device()
237 	input_dev->id.vendor = codec->core.vendor_id >> 16;  in snd_hda_attach_beep_device()
238 	input_dev->id.product = codec->core.vendor_id & 0xffff;  in snd_hda_attach_beep_device()
239 	input_dev->id.version = 0x01;  in snd_hda_attach_beep_device()
241 	input_dev->evbit[0] = BIT_MASK(EV_SND);  in snd_hda_attach_beep_device()
242 	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);  in snd_hda_attach_beep_device()
243 	input_dev->event = snd_hda_beep_event;  in snd_hda_attach_beep_device()
246 	beep->dev = input_dev;  in snd_hda_attach_beep_device()
248 	err = snd_device_new(codec->card, SNDRV_DEV_JACK, beep, &ops);  in snd_hda_attach_beep_device()
255 	input_free_device(beep->dev);  in snd_hda_attach_beep_device()
258 	codec->beep = NULL;  in snd_hda_attach_beep_device()
264  * snd_hda_detach_beep_device - Detach the beep device
269 	if (!codec->bus->shutdown && codec->beep)  in snd_hda_detach_beep_device()
270 		snd_device_free(codec->card, codec->beep);  in snd_hda_detach_beep_device()
284  * snd_hda_mixer_amp_switch_get_beep - Get callback for beep controls
292 	struct hda_beep *beep = codec->beep;  in snd_hda_mixer_amp_switch_get_beep()
295 	if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) {  in snd_hda_mixer_amp_switch_get_beep()
297 			ucontrol->value.integer.value[0] = beep->enabled;  in snd_hda_mixer_amp_switch_get_beep()
299 			ucontrol->value.integer.value[1] = beep->enabled;  in snd_hda_mixer_amp_switch_get_beep()
307  * snd_hda_mixer_amp_switch_put_beep - Put callback for beep controls
315 	struct hda_beep *beep = codec->beep;  in snd_hda_mixer_amp_switch_put_beep()
319 		long *valp = ucontrol->value.integer.value;  in snd_hda_mixer_amp_switch_put_beep()