mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 09:02:00 +00:00
1289e9e8b4
Split the monolithc HD-audio driver into several pieces: - snd-hda-intel HD-audio PCI controller driver; loaded via udev - snd-hda-codec HD-audio codec bus driver - snd-hda-codec-* Specific HD-audio codec drivers When built as modules, snd-hda-codec (that is invoked by snd-hda-intel) looks up the codec vendor ID and loads the corresponding codec module automatically via request_module(). When built in a kernel, each codec drivers are statically hooked up before probing the PCI. This patch adds appropriate EXPORT_SYMBOL_GPL()'s and the module information for each driver, and driver-linking codes between codec-bus and codec drivers. TODO: - Avoid EXPORT_SYMBOL*() when built-in kernel - Restore __devinit appropriately depending on the condition Signed-off-by: Takashi Iwai <tiwai@suse.de>
145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/*
|
|
* 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/workqueue.h>
|
|
#include <sound/core.h>
|
|
#include "hda_beep.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_cache(codec, beep->nid, 0,
|
|
AC_VERB_SET_BEEP_CONTROL, beep->tone);
|
|
}
|
|
|
|
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:
|
|
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++;
|
|
}
|
|
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)
|
|
{
|
|
struct input_dev *input_dev;
|
|
struct hda_beep *beep;
|
|
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);
|
|
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);
|
|
kfree(beep);
|
|
return err;
|
|
}
|
|
|
|
/* 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;
|
|
codec->beep = beep;
|
|
|
|
INIT_WORK(&beep->beep_work, &snd_hda_generate_beep);
|
|
return 0;
|
|
}
|
|
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);
|
|
flush_scheduled_work();
|
|
|
|
input_unregister_device(beep->dev);
|
|
kfree(beep);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(snd_hda_detach_beep_device);
|