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Diffstat (limited to 'sound/pci/hda/hda_beep.c')
-rw-r--r--sound/pci/hda/hda_beep.c114
1 files changed, 96 insertions, 18 deletions
diff --git a/sound/pci/hda/hda_beep.c b/sound/pci/hda/hda_beep.c
index 3f51a981e604..5fe34a8d8c81 100644
--- a/sound/pci/hda/hda_beep.c
+++ b/sound/pci/hda/hda_beep.c
@@ -113,23 +113,25 @@ static int snd_hda_beep_event(struct input_dev *dev, unsigned int type,
return 0;
}
-int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
+static void snd_hda_do_detach(struct hda_beep *beep)
+{
+ input_unregister_device(beep->dev);
+ beep->dev = NULL;
+ cancel_work_sync(&beep->beep_work);
+ /* turn off beep for sure */
+ snd_hda_codec_write_cache(beep->codec, beep->nid, 0,
+ AC_VERB_SET_BEEP_CONTROL, 0);
+}
+
+static int snd_hda_do_attach(struct hda_beep *beep)
{
struct input_dev *input_dev;
- struct hda_beep *beep;
+ struct hda_codec *codec = beep->codec;
int err;
- if (!snd_hda_get_bool_hint(codec, "beep"))
- return 0; /* disabled explicitly */
-
- 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);
+ printk(KERN_INFO "hda_beep: unable to allocate input device\n");
return -ENOMEM;
}
@@ -151,21 +153,96 @@ int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
err = input_register_device(input_dev);
if (err < 0) {
input_free_device(input_dev);
- kfree(beep);
+ printk(KERN_INFO "hda_beep: unable to register input device\n");
return err;
}
+ beep->dev = input_dev;
+ return 0;
+}
+
+static void snd_hda_do_register(struct work_struct *work)
+{
+ struct hda_beep *beep =
+ container_of(work, struct hda_beep, register_work);
+
+ mutex_lock(&beep->mutex);
+ if (beep->enabled && !beep->dev)
+ snd_hda_do_attach(beep);
+ mutex_unlock(&beep->mutex);
+}
+
+static void snd_hda_do_unregister(struct work_struct *work)
+{
+ struct hda_beep *beep =
+ container_of(work, struct hda_beep, unregister_work.work);
+
+ mutex_lock(&beep->mutex);
+ if (!beep->enabled && beep->dev)
+ snd_hda_do_detach(beep);
+ mutex_unlock(&beep->mutex);
+}
+int snd_hda_enable_beep_device(struct hda_codec *codec, int enable)
+{
+ struct hda_beep *beep = codec->beep;
+ enable = !!enable;
+ if (beep == NULL)
+ return 0;
+ if (beep->enabled != enable) {
+ beep->enabled = enable;
+ if (!enable) {
+ /* turn off beep */
+ snd_hda_codec_write_cache(beep->codec, beep->nid, 0,
+ AC_VERB_SET_BEEP_CONTROL, 0);
+ }
+ if (beep->mode == HDA_BEEP_MODE_SWREG) {
+ if (enable) {
+ cancel_delayed_work(&beep->unregister_work);
+ schedule_work(&beep->register_work);
+ } else {
+ schedule_delayed_work(&beep->unregister_work,
+ HZ);
+ }
+ }
+ return 1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_HDA(snd_hda_enable_beep_device);
+
+int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
+{
+ struct hda_beep *beep;
+
+ 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,
AC_VERB_SET_DIGI_CONVERT_2, 0x01);
beep->nid = nid;
- beep->dev = input_dev;
beep->codec = codec;
- beep->enabled = 1;
+ beep->mode = codec->beep_mode;
codec->beep = beep;
+ INIT_WORK(&beep->register_work, &snd_hda_do_register);
+ INIT_DELAYED_WORK(&beep->unregister_work, &snd_hda_do_unregister);
INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
+ mutex_init(&beep->mutex);
+
+ if (beep->mode == HDA_BEEP_MODE_ON) {
+ beep->enabled = 1;
+ snd_hda_do_register(&beep->register_work);
+ }
+
return 0;
}
EXPORT_SYMBOL_HDA(snd_hda_attach_beep_device);
@@ -174,11 +251,12 @@ void snd_hda_detach_beep_device(struct hda_codec *codec)
{
struct hda_beep *beep = codec->beep;
if (beep) {
- cancel_work_sync(&beep->beep_work);
-
- input_unregister_device(beep->dev);
- kfree(beep);
+ cancel_work_sync(&beep->register_work);
+ cancel_delayed_work(&beep->unregister_work);
+ if (beep->enabled)
+ snd_hda_do_detach(beep);
codec->beep = NULL;
+ kfree(beep);
}
}
EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device);