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path: root/sound/pci/hda/hda_beep.c
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Diffstat (limited to 'sound/pci/hda/hda_beep.c')
-rw-r--r--sound/pci/hda/hda_beep.c240
1 files changed, 202 insertions, 38 deletions
diff --git a/sound/pci/hda/hda_beep.c b/sound/pci/hda/hda_beep.c
index 960fd797038..8c6c50afc0b 100644
--- a/sound/pci/hda/hda_beep.c
+++ b/sound/pci/hda/hda_beep.c
@@ -20,10 +20,12 @@
*/
#include <linux/input.h>
-#include <linux/pci.h>
+#include <linux/slab.h>
#include <linux/workqueue.h>
+#include <linux/export.h>
#include <sound/core.h>
#include "hda_beep.h"
+#include "hda_local.h"
enum {
DIGBEEP_HZ_STEP = 46875, /* 46.875 Hz */
@@ -36,13 +38,66 @@ static void snd_hda_generate_beep(struct work_struct *work)
struct hda_beep *beep =
container_of(work, struct hda_beep, beep_work);
struct hda_codec *codec = beep->codec;
+ int tone;
if (!beep->enabled)
return;
+ tone = beep->tone;
+ if (tone && !beep->playing) {
+ snd_hda_power_up(codec);
+ beep->playing = 1;
+ }
/* generate tone */
- snd_hda_codec_write_cache(codec, beep->nid, 0,
- AC_VERB_SET_BEEP_CONTROL, beep->tone);
+ snd_hda_codec_write(codec, beep->nid, 0,
+ AC_VERB_SET_BEEP_CONTROL, tone);
+ if (!tone && beep->playing) {
+ beep->playing = 0;
+ snd_hda_power_down(codec);
+ }
+}
+
+/* (non-standard) Linear beep tone calculation for IDT/STAC codecs
+ *
+ * The tone frequency of beep generator on IDT/STAC codecs is
+ * defined from the 8bit tone parameter, in Hz,
+ * freq = 48000 * (257 - tone) / 1024
+ * that is from 12kHz to 93.75Hz in steps of 46.875 Hz
+ */
+static int beep_linear_tone(struct hda_beep *beep, int hz)
+{
+ if (hz <= 0)
+ return 0;
+ hz *= 1000; /* fixed point */
+ hz = hz - DIGBEEP_HZ_MIN
+ + DIGBEEP_HZ_STEP / 2; /* round to nearest step */
+ if (hz < 0)
+ hz = 0; /* turn off PC beep*/
+ else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))
+ hz = 1; /* max frequency */
+ else {
+ hz /= DIGBEEP_HZ_STEP;
+ hz = 255 - hz;
+ }
+ return hz;
+}
+
+/* HD-audio standard beep tone parameter calculation
+ *
+ * The tone frequency in Hz is calculated as
+ * freq = 48000 / (tone * 4)
+ * from 47Hz to 12kHz
+ */
+static int beep_standard_tone(struct hda_beep *beep, int hz)
+{
+ if (hz <= 0)
+ return 0; /* disabled */
+ hz = 12000 / hz;
+ if (hz > 0xff)
+ return 0xff;
+ if (hz <= 0)
+ return 1;
+ return hz;
}
static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
@@ -54,44 +109,52 @@ static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
case SND_BELL:
if (hz)
hz = 1000;
+ /* fallthru */
case SND_TONE:
- hz *= 1000; /* fixed point */
- hz = hz - DIGBEEP_HZ_MIN;
- if (hz < 0)
- hz = 0; /* turn off PC beep*/
- else if (hz >= (DIGBEEP_HZ_MAX - DIGBEEP_HZ_MIN))
- hz = 0xff;
- else {
- hz /= DIGBEEP_HZ_STEP;
- hz++;
- }
+ if (beep->linear_tone)
+ beep->tone = beep_linear_tone(beep, hz);
+ else
+ beep->tone = beep_standard_tone(beep, hz);
break;
default:
return -1;
}
- beep->tone = hz;
/* schedule beep event */
schedule_work(&beep->beep_work);
return 0;
}
-int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
+static void turn_off_beep(struct hda_beep *beep)
+{
+ cancel_work_sync(&beep->beep_work);
+ if (beep->playing) {
+ /* turn off beep */
+ snd_hda_codec_write(beep->codec, beep->nid, 0,
+ AC_VERB_SET_BEEP_CONTROL, 0);
+ beep->playing = 0;
+ snd_hda_power_down(beep->codec);
+ }
+}
+
+static void snd_hda_do_detach(struct hda_beep *beep)
+{
+ if (beep->registered)
+ input_unregister_device(beep->dev);
+ else
+ input_free_device(beep->dev);
+ beep->dev = NULL;
+ turn_off_beep(beep);
+}
+
+static int snd_hda_do_attach(struct hda_beep *beep)
{
struct input_dev *input_dev;
- struct hda_beep *beep;
- int err;
+ struct hda_codec *codec = beep->codec;
- beep = kzalloc(sizeof(*beep), GFP_KERNEL);
- if (beep == NULL)
- return -ENOMEM;
- snprintf(beep->phys, sizeof(beep->phys),
- "card%d/codec#%d/beep0", codec->bus->card->number, codec->addr);
input_dev = input_allocate_device();
- if (!input_dev) {
- kfree(beep);
+ if (!input_dev)
return -ENOMEM;
- }
/* setup digital beep device */
input_dev->name = "HDA Digital PCBeep";
@@ -105,39 +168,140 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
input_dev->evbit[0] = BIT_MASK(EV_SND);
input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
input_dev->event = snd_hda_beep_event;
- input_dev->dev.parent = &codec->bus->pci->dev;
+ input_dev->dev.parent = &codec->dev;
input_set_drvdata(input_dev, beep);
- err = input_register_device(input_dev);
- if (err < 0) {
- input_free_device(input_dev);
- kfree(beep);
- return err;
+ beep->dev = input_dev;
+ return 0;
+}
+
+int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
+{
+ struct hda_beep *beep = codec->beep;
+ if (!beep)
+ return 0;
+ enable = !!enable;
+ if (beep->enabled != enable) {
+ beep->enabled = enable;
+ if (!enable)
+ turn_off_beep(beep);
+ return 1;
}
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hda_enable_beep_device);
+int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
+{
+ struct hda_beep *beep;
+ int err;
+
+ if (!snd_hda_get_bool_hint(codec, "beep"))
+ return 0; /* disabled explicitly by hints */
+ if (codec->beep_mode == HDA_BEEP_MODE_OFF)
+ return 0; /* disabled by module option */
+
+ beep = kzalloc(sizeof(*beep), GFP_KERNEL);
+ if (beep == NULL)
+ return -ENOMEM;
+ snprintf(beep->phys, sizeof(beep->phys),
+ "card%d/codec#%d/beep0", codec->bus->card->number, codec->addr);
/* enable linear scale */
- snd_hda_codec_write(codec, nid, 0,
+ snd_hda_codec_write_cache(codec, nid, 0,
AC_VERB_SET_DIGI_CONVERT_2, 0x01);
beep->nid = nid;
- beep->dev = input_dev;
beep->codec = codec;
- beep->enabled = 1;
codec->beep = beep;
INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
+ mutex_init(&beep->mutex);
+
+ err = snd_hda_do_attach(beep);
+ if (err < 0) {
+ kfree(beep);
+ codec->beep = NULL;
+ return err;
+ }
+
return 0;
}
-EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device);
+EXPORT_SYMBOL_GPL(snd_hda_attach_beep_device);
void snd_hda_detach_beep_device(struct hda_codec *codec)
{
struct hda_beep *beep = codec->beep;
if (beep) {
- cancel_work_sync(&beep->beep_work);
+ if (beep->dev)
+ snd_hda_do_detach(beep);
+ codec->beep = NULL;
+ kfree(beep);
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hda_detach_beep_device);
- input_unregister_device(beep->dev);
+int snd_hda_register_beep_device(struct hda_codec *codec)
+{
+ struct hda_beep *beep = codec->beep;
+ int err;
+
+ if (!beep || !beep->dev)
+ return 0;
+
+ err = input_register_device(beep->dev);
+ if (err < 0) {
+ codec_err(codec, "hda_beep: unable to register input device\n");
+ input_free_device(beep->dev);
+ codec->beep = NULL;
kfree(beep);
+ return err;
+ }
+ beep->registered = true;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hda_register_beep_device);
+
+static bool ctl_has_mute(struct snd_kcontrol *kcontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ return query_amp_caps(codec, get_amp_nid(kcontrol),
+ get_amp_direction(kcontrol)) & AC_AMPCAP_MUTE;
+}
+
+/* get/put callbacks for beep mute mixer switches */
+int snd_hda_mixer_amp_switch_get_beep(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct hda_beep *beep = codec->beep;
+ if (beep && (!beep->enabled || !ctl_has_mute(kcontrol))) {
+ ucontrol->value.integer.value[0] =
+ ucontrol->value.integer.value[1] = beep->enabled;
+ return 0;
+ }
+ return snd_hda_mixer_amp_switch_get(kcontrol, ucontrol);
+}
+EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_get_beep);
+
+int snd_hda_mixer_amp_switch_put_beep(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ struct hda_beep *beep = codec->beep;
+ if (beep) {
+ u8 chs = get_amp_channels(kcontrol);
+ int enable = 0;
+ long *valp = ucontrol->value.integer.value;
+ if (chs & 1) {
+ enable |= *valp;
+ valp++;
+ }
+ if (chs & 2)
+ enable |= *valp;
+ snd_hda_enable_beep_device(codec, enable);
}
+ if (!ctl_has_mute(kcontrol))
+ return 0;
+ return snd_hda_mixer_amp_switch_put(kcontrol, ucontrol);
}
-EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device);
+EXPORT_SYMBOL_GPL(snd_hda_mixer_amp_switch_put_beep);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-11 14:47:00 +0000