/*
* This program 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 program 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/init.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
#include <linux/usb/audio-v3.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include "usbaudio.h"
#include "card.h"
#include "proc.h"
#include "quirks.h"
#include "endpoint.h"
#include "pcm.h"
#include "helper.h"
#include "format.h"
#include "clock.h"
#include "stream.h"
/*
* free a substream
*/
static void free_substream(struct snd_usb_substream *subs)
{
struct audioformat *fp, *n;
if (!subs->num_formats)
return; /* not initialized */
list_for_each_entry_safe(fp, n, &subs->fmt_list, list) {
kfree(fp->rate_table);
kfree(fp->chmap);
kfree(fp);
}
kfree(subs->rate_list.list);
}
/*
* free a usb stream instance
*/
static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
{
free_substream(&stream->substream[0]);
free_substream(&stream->substream[1]);
list_del(&stream->list);
kfree(stream);
}
static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
{
struct snd_usb_stream *stream = pcm->private_data;
if (stream) {
stream->pcm = NULL;
snd_usb_audio_stream_free(stream);
}
}
/*
* initialize the substream instance.
*/
static void snd_usb_init_substream(struct snd_usb_stream *as,
int stream,
struct audioformat *fp)
{
struct snd_usb_substream *subs = &as->substream[stream];
INIT_LIST_HEAD(&subs->fmt_list);
spin_lock_init(&subs->lock);
subs->stream = as;
subs->direction = stream;
subs->dev = as->chip->dev;
subs->txfr_quirk = as->chip->txfr_quirk;
subs->tx_length_quirk = as->chip->tx_length_quirk;
subs->speed = snd_usb_get_speed(subs->dev);
subs->pkt_offset_adj = 0;
snd_usb_set_pcm_ops(as->pcm, stream);
list_add_tail(&fp->list, &subs->fmt_list);
subs->formats |= fp->formats;
subs->num_formats++;
subs->fmt_type = fp->fmt_type;
subs->ep_num = fp->endpoint;
if (fp->channels > subs->channels_max)
subs->channels_max = fp->channels;
}
/* kctl callbacks for usb-audio channel maps */
static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct snd_usb_substream *subs = info->private_data;
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = subs->channels_max;
uinfo->value.integer.min = 0;
uinfo->value.integer.max = SNDRV_CHMAP_LAST;
return 0;
}
/* check whether a duplicated entry exists in the audiofmt list */
static bool have_dup_chmap(struct snd_usb_substream *subs,
struct audioformat *fp)
{
struct audioformat *prev = fp;
list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) {
if (prev->chmap &&
!memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap)))
return true;
}
return false;
}
static int usb_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
unsigned int size, unsigned int __user *tlv)
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
struct snd_usb_substream *subs = info->private_data;
struct audioformat *fp;
unsigned int __user *dst;
int count = 0;
if (size < 8)
return -