#include <linux/workqueue.h>
#include <sound/core.h>
#include "hda_beep.h"
+#include "hda_local.h"
enum {
DIGBEEP_HZ_STEP = 46875, /* 46.875 Hz */
return;
/* generate tone */
- snd_hda_codec_write_cache(codec, beep->nid, 0,
+ snd_hda_codec_write(codec, beep->nid, 0,
AC_VERB_SET_BEEP_CONTROL, beep->tone);
}
+/* (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,
unsigned int code, int hz)
{
if (hz)
hz = 1000;
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 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(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;
- 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;
}
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(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) {
+ int 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);
void snd_hda_detach_beep_device(struct hda_codec *codec)
{
struct hda_beep *beep = codec->beep;
if (beep) {
- cancel_work_sync(&beep->beep_work);
- flush_scheduled_work();
-
- input_unregister_device(beep->dev);
+ cancel_work_sync(&beep->register_work);
+ cancel_delayed_work(&beep->unregister_work);
+ if (beep->dev)
+ snd_hda_do_detach(beep);
+ codec->beep = NULL;
kfree(beep);
}
}
+EXPORT_SYMBOL_HDA(snd_hda_detach_beep_device);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff