summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/sound/pci/hda/hda_beep.c
diff options
context:
space:
mode:
Diffstat (limited to 'ANDROID_3.4.5/sound/pci/hda/hda_beep.c')
-rw-r--r--ANDROID_3.4.5/sound/pci/hda/hda_beep.c268
1 files changed, 0 insertions, 268 deletions
diff --git a/ANDROID_3.4.5/sound/pci/hda/hda_beep.c b/ANDROID_3.4.5/sound/pci/hda/hda_beep.c
deleted file mode 100644
index 60738e52..00000000
--- a/ANDROID_3.4.5/sound/pci/hda/hda_beep.c
+++ /dev/null
@@ -1,268 +0,0 @@
-/*
- * Digital Beep Input Interface for HD-audio codec
- *
- * Author: Matthew Ranostay <mranostay@embeddedalley.com>
- * Copyright (c) 2008 Embedded Alley Solutions Inc
- *
- * This driver is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This driver is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#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 */
- DIGBEEP_HZ_MIN = 93750, /* 93.750 Hz */
- DIGBEEP_HZ_MAX = 12000000, /* 12 KHz */
-};
-
-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;
-
- if (!beep->enabled)
- return;
-
- /* generate tone */
- 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)
-{
- struct hda_beep *beep = input_get_drvdata(dev);
-
- switch (code) {
- case SND_BELL:
- if (hz)
- hz = 1000;
- case SND_TONE:
- if (beep->linear_tone)
- beep->tone = beep_linear_tone(beep, hz);
- else
- beep->tone = beep_standard_tone(beep, hz);
- break;
- default:
- return -1;
- }
-
- /* schedule beep event */
- schedule_work(&beep->beep_work);
- return 0;
-}
-
-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_codec *codec = beep->codec;
- int err;
-
- input_dev = input_allocate_device();
- if (!input_dev) {
- printk(KERN_INFO "hda_beep: unable to allocate input device\n");
- return -ENOMEM;
- }
-
- /* setup digital beep device */
- input_dev->name = "HDA Digital PCBeep";
- input_dev->phys = beep->phys;
- input_dev->id.bustype = BUS_PCI;
-
- input_dev->id.vendor = codec->vendor_id >> 16;
- input_dev->id.product = codec->vendor_id & 0xffff;
- input_dev->id.version = 0x01;
-
- 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_set_drvdata(input_dev, beep);
-
- err = input_register_device(input_dev);
- if (err < 0) {
- input_free_device(input_dev);
- 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->codec = codec;
- 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->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);
generated by cgit (git 2.34.1) at 2024-12-21 18:37:43 +0000