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path: root/drivers/media/video/em28xx/em28xx-audio.c
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Diffstat (limited to 'drivers/media/video/em28xx/em28xx-audio.c')
-rw-r--r--drivers/media/video/em28xx/em28xx-audio.c751
1 files changed, 0 insertions, 751 deletions
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c
deleted file mode 100644
index 2fdb66ee44ab..000000000000
--- a/drivers/media/video/em28xx/em28xx-audio.c
+++ /dev/null
@@ -1,751 +0,0 @@
-/*
- * Empiatech em28x1 audio extension
- *
- * Copyright (C) 2006 Markus Rechberger <mrechberger@gmail.com>
- *
- * Copyright (C) 2007-2011 Mauro Carvalho Chehab <mchehab@redhat.com>
- * - Port to work with the in-kernel driver
- * - Cleanups, fixes, alsa-controls, etc.
- *
- * This driver is based on my previous au600 usb pstn audio driver
- * and inherits all the copyrights
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/usb.h>
-#include <linux/init.h>
-#include <linux/sound.h>
-#include <linux/spinlock.h>
-#include <linux/soundcard.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/proc_fs.h>
-#include <linux/module.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/info.h>
-#include <sound/initval.h>
-#include <sound/control.h>
-#include <sound/tlv.h>
-#include <sound/ac97_codec.h>
-#include <media/v4l2-common.h>
-#include "em28xx.h"
-
-static int debug;
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "activates debug info");
-
-#define dprintk(fmt, arg...) do { \
- if (debug) \
- printk(KERN_INFO "em28xx-audio %s: " fmt, \
- __func__, ##arg); \
- } while (0)
-
-static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
-
-static int em28xx_deinit_isoc_audio(struct em28xx *dev)
-{
- int i;
-
- dprintk("Stopping isoc\n");
- for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
- if (!irqs_disabled())
- usb_kill_urb(dev->adev.urb[i]);
- else
- usb_unlink_urb(dev->adev.urb[i]);
-
- usb_free_urb(dev->adev.urb[i]);
- dev->adev.urb[i] = NULL;
-
- kfree(dev->adev.transfer_buffer[i]);
- dev->adev.transfer_buffer[i] = NULL;
- }
-
- return 0;
-}
-
-static void em28xx_audio_isocirq(struct urb *urb)
-{
- struct em28xx *dev = urb->context;
- int i;
- unsigned int oldptr;
- int period_elapsed = 0;
- int status;
- unsigned char *cp;
- unsigned int stride;
- struct snd_pcm_substream *substream;
- struct snd_pcm_runtime *runtime;
-
- switch (urb->status) {
- case 0: /* success */
- case -ETIMEDOUT: /* NAK */
- break;
- case -ECONNRESET: /* kill */
- case -ENOENT:
- case -ESHUTDOWN:
- return;
- default: /* error */
- dprintk("urb completition error %d.\n", urb->status);
- break;
- }
-
- if (atomic_read(&dev->stream_started) == 0)
- return;
-
- if (dev->adev.capture_pcm_substream) {
- substream = dev->adev.capture_pcm_substream;
- runtime = substream->runtime;
- stride = runtime->frame_bits >> 3;
-
- for (i = 0; i < urb->number_of_packets; i++) {
- int length =
- urb->iso_frame_desc[i].actual_length / stride;
- cp = (unsigned char *)urb->transfer_buffer +
- urb->iso_frame_desc[i].offset;
-
- if (!length)
- continue;
-
- oldptr = dev->adev.hwptr_done_capture;
- if (oldptr + length >= runtime->buffer_size) {
- unsigned int cnt =
- runtime->buffer_size - oldptr;
- memcpy(runtime->dma_area + oldptr * stride, cp,
- cnt * stride);
- memcpy(runtime->dma_area, cp + cnt * stride,
- length * stride - cnt * stride);
- } else {
- memcpy(runtime->dma_area + oldptr * stride, cp,
- length * stride);
- }
-
- snd_pcm_stream_lock(substream);
-
- dev->adev.hwptr_done_capture += length;
- if (dev->adev.hwptr_done_capture >=
- runtime->buffer_size)
- dev->adev.hwptr_done_capture -=
- runtime->buffer_size;
-
- dev->adev.capture_transfer_done += length;
- if (dev->adev.capture_transfer_done >=
- runtime->period_size) {
- dev->adev.capture_transfer_done -=
- runtime->period_size;
- period_elapsed = 1;
- }
-
- snd_pcm_stream_unlock(substream);
- }
- if (period_elapsed)
- snd_pcm_period_elapsed(substream);
- }
- urb->status = 0;
-
- status = usb_submit_urb(urb, GFP_ATOMIC);
- if (status < 0) {
- em28xx_errdev("resubmit of audio urb failed (error=%i)\n",
- status);
- }
- return;
-}
-
-static int em28xx_init_audio_isoc(struct em28xx *dev)
-{
- int i, errCode;
- const int sb_size = EM28XX_NUM_AUDIO_PACKETS *
- EM28XX_AUDIO_MAX_PACKET_SIZE;
-
- dprintk("Starting isoc transfers\n");
-
- for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
- struct urb *urb;
- int j, k;
-
- dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
- if (!dev->adev.transfer_buffer[i])
- return -ENOMEM;
-
- memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
- urb = usb_alloc_urb(EM28XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
- if (!urb) {
- em28xx_errdev("usb_alloc_urb failed!\n");
- for (j = 0; j < i; j++) {
- usb_free_urb(dev->adev.urb[j]);
- kfree(dev->adev.transfer_buffer[j]);
- }
- return -ENOMEM;
- }
-
- urb->dev = dev->udev;
- urb->context = dev;
- urb->pipe = usb_rcvisocpipe(dev->udev, EM28XX_EP_AUDIO);
- urb->transfer_flags = URB_ISO_ASAP;
- urb->transfer_buffer = dev->adev.transfer_buffer[i];
- urb->interval = 1;
- urb->complete = em28xx_audio_isocirq;
- urb->number_of_packets = EM28XX_NUM_AUDIO_PACKETS;
- urb->transfer_buffer_length = sb_size;
-
- for (j = k = 0; j < EM28XX_NUM_AUDIO_PACKETS;
- j++, k += EM28XX_AUDIO_MAX_PACKET_SIZE) {
- urb->iso_frame_desc[j].offset = k;
- urb->iso_frame_desc[j].length =
- EM28XX_AUDIO_MAX_PACKET_SIZE;
- }
- dev->adev.urb[i] = urb;
- }
-
- for (i = 0; i < EM28XX_AUDIO_BUFS; i++) {
- errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
- if (errCode) {
- em28xx_errdev("submit of audio urb failed\n");
- em28xx_deinit_isoc_audio(dev);
- atomic_set(&dev->stream_started, 0);
- return errCode;
- }
-
- }
-
- return 0;
-}
-
-static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
- size_t size)
-{
- struct snd_pcm_runtime *runtime = subs->runtime;
-
- dprintk("Allocating vbuffer\n");
- if (runtime->dma_area) {
- if (runtime->dma_bytes > size)
- return 0;
-
- vfree(runtime->dma_area);
- }
- runtime->dma_area = vmalloc(size);
- if (!runtime->dma_area)
- return -ENOMEM;
-
- runtime->dma_bytes = size;
-
- return 0;
-}
-
-static struct snd_pcm_hardware snd_em28xx_hw_capture = {
- .info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
- SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_BATCH |
- SNDRV_PCM_INFO_MMAP_VALID,
-
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
-
- .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
-
- .rate_min = 48000,
- .rate_max = 48000,
- .channels_min = 2,
- .channels_max = 2,
- .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
- .period_bytes_min = 64, /* 12544/2, */
- .period_bytes_max = 12544,
- .periods_min = 2,
- .periods_max = 98, /* 12544, */
-};
-
-static int snd_em28xx_capture_open(struct snd_pcm_substream *substream)
-{
- struct em28xx *dev = snd_pcm_substream_chip(substream);
- struct snd_pcm_runtime *runtime = substream->runtime;
- int ret = 0;
-
- dprintk("opening device and trying to acquire exclusive lock\n");
-
- if (!dev) {
- em28xx_err("BUG: em28xx can't find device struct."
- " Can't proceed with open\n");
- return -ENODEV;
- }
-
- runtime->hw = snd_em28xx_hw_capture;
- if ((dev->alt == 0 || dev->audio_ifnum) && dev->adev.users == 0) {
- if (dev->audio_ifnum)
- dev->alt = 1;
- else
- dev->alt = 7;
-
- dprintk("changing alternate number on interface %d to %d\n",
- dev->audio_ifnum, dev->alt);
- usb_set_interface(dev->udev, dev->audio_ifnum, dev->alt);
-
- /* Sets volume, mute, etc */
- dev->mute = 0;
- mutex_lock(&dev->lock);
- ret = em28xx_audio_analog_set(dev);
- if (ret < 0)
- goto err;
-
- dev->adev.users++;
- mutex_unlock(&dev->lock);
- }
-
- snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
- dev->adev.capture_pcm_substream = substream;
-
- return 0;
-err:
- mutex_unlock(&dev->lock);
-
- em28xx_err("Error while configuring em28xx mixer\n");
- return ret;
-}
-
-static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)
-{
- struct em28xx *dev = snd_pcm_substream_chip(substream);
-
- dprintk("closing device\n");
-
- dev->mute = 1;
- mutex_lock(&dev->lock);
- dev->adev.users--;
- if (atomic_read(&dev->stream_started) > 0) {
- atomic_set(&dev->stream_started, 0);
- schedule_work(&dev->wq_trigger);
- }
-
- em28xx_audio_analog_set(dev);
- if (substream->runtime->dma_area) {
- dprintk("freeing\n");
- vfree(substream->runtime->dma_area);
- substream->runtime->dma_area = NULL;
- }
- mutex_unlock(&dev->lock);
-
- return 0;
-}
-
-static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- int ret;
-
- dprintk("Setting capture parameters\n");
-
- ret = snd_pcm_alloc_vmalloc_buffer(substream,
- params_buffer_bytes(hw_params));
- if (ret < 0)
- return ret;
-#if 0
- /* TODO: set up em28xx audio chip to deliver the correct audio format,
- current default is 48000hz multiplexed => 96000hz mono
- which shouldn't matter since analogue TV only supports mono */
- unsigned int channels, rate, format;
-
- format = params_format(hw_params);
- rate = params_rate(hw_params);
- channels = params_channels(hw_params);
-#endif
-
- return 0;
-}
-
-static int snd_em28xx_hw_capture_free(struct snd_pcm_substream *substream)
-{
- struct em28xx *dev = snd_pcm_substream_chip(substream);
-
- dprintk("Stop capture, if needed\n");
-
- if (atomic_read(&dev->stream_started) > 0) {
- atomic_set(&dev->stream_started, 0);
- schedule_work(&dev->wq_trigger);
- }
-
- return 0;
-}
-
-static int snd_em28xx_prepare(struct snd_pcm_substream *substream)
-{
- struct em28xx *dev = snd_pcm_substream_chip(substream);
-
- dev->adev.hwptr_done_capture = 0;
- dev->adev.capture_transfer_done = 0;
-
- return 0;
-}
-
-static void audio_trigger(struct work_struct *work)
-{
- struct em28xx *dev = container_of(work, struct em28xx, wq_trigger);
-
- if (atomic_read(&dev->stream_started)) {
- dprintk("starting capture");
- em28xx_init_audio_isoc(dev);
- } else {
- dprintk("stopping capture");
- em28xx_deinit_isoc_audio(dev);
- }
-}
-
-static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream,
- int cmd)
-{
- struct em28xx *dev = snd_pcm_substream_chip(substream);
- int retval = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
- case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
- case SNDRV_PCM_TRIGGER_START:
- atomic_set(&dev->stream_started, 1);
- break;
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
- case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
- case SNDRV_PCM_TRIGGER_STOP:
- atomic_set(&dev->stream_started, 0);
- break;
- default:
- retval = -EINVAL;
- }
- schedule_work(&dev->wq_trigger);
- return retval;
-}
-
-static snd_pcm_uframes_t snd_em28xx_capture_pointer(struct snd_pcm_substream
- *substream)
-{
- unsigned long flags;
- struct em28xx *dev;
- snd_pcm_uframes_t hwptr_done;
-
- dev = snd_pcm_substream_chip(substream);
- spin_lock_irqsave(&dev->adev.slock, flags);
- hwptr_done = dev->adev.hwptr_done_capture;
- spin_unlock_irqrestore(&dev->adev.slock, flags);
-
- return hwptr_done;
-}
-
-static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
- unsigned long offset)
-{
- void *pageptr = subs->runtime->dma_area + offset;
-
- return vmalloc_to_page(pageptr);
-}
-
-/*
- * AC97 volume control support
- */
-static int em28xx_vol_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *info)
-{
- info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
- info->count = 2;
- info->value.integer.min = 0;
- info->value.integer.max = 0x1f;
-
- return 0;
-}
-
-static int em28xx_vol_put(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *value)
-{
- struct em28xx *dev = snd_kcontrol_chip(kcontrol);
- u16 val = (0x1f - (value->value.integer.value[0] & 0x1f)) |
- (0x1f - (value->value.integer.value[1] & 0x1f)) << 8;
- int rc;
-
- mutex_lock(&dev->lock);
- rc = em28xx_read_ac97(dev, kcontrol->private_value);
- if (rc < 0)
- goto err;
-
- val |= rc & 0x8000; /* Preserve the mute flag */
-
- rc = em28xx_write_ac97(dev, kcontrol->private_value, val);
- if (rc < 0)
- goto err;
-
- dprintk("%sleft vol %d, right vol %d (0x%04x) to ac97 volume control 0x%04x\n",
- (val & 0x8000) ? "muted " : "",
- 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f),
- val, (int)kcontrol->private_value);
-
-err:
- mutex_unlock(&dev->lock);
- return rc;
-}
-
-static int em28xx_vol_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *value)
-{
- struct em28xx *dev = snd_kcontrol_chip(kcontrol);
- int val;
-
- mutex_lock(&dev->lock);
- val = em28xx_read_ac97(dev, kcontrol->private_value);
- mutex_unlock(&dev->lock);
- if (val < 0)
- return val;
-
- dprintk("%sleft vol %d, right vol %d (0x%04x) from ac97 volume control 0x%04x\n",
- (val & 0x8000) ? "muted " : "",
- 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f),
- val, (int)kcontrol->private_value);
-
- value->value.integer.value[0] = 0x1f - (val & 0x1f);
- value->value.integer.value[1] = 0x1f - ((val << 8) & 0x1f);
-
- return 0;
-}
-
-static int em28xx_vol_put_mute(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *value)
-{
- struct em28xx *dev = snd_kcontrol_chip(kcontrol);
- u16 val = value->value.integer.value[0];
- int rc;
-
- mutex_lock(&dev->lock);
- rc = em28xx_read_ac97(dev, kcontrol->private_value);
- if (rc < 0)
- goto err;
-
- if (val)
- rc &= 0x1f1f;
- else
- rc |= 0x8000;
-
- rc = em28xx_write_ac97(dev, kcontrol->private_value, rc);
- if (rc < 0)
- goto err;
-
- dprintk("%sleft vol %d, right vol %d (0x%04x) to ac97 volume control 0x%04x\n",
- (val & 0x8000) ? "muted " : "",
- 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f),
- val, (int)kcontrol->private_value);
-
-err:
- mutex_unlock(&dev->lock);
- return rc;
-}
-
-static int em28xx_vol_get_mute(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *value)
-{
- struct em28xx *dev = snd_kcontrol_chip(kcontrol);
- int val;
-
- mutex_lock(&dev->lock);
- val = em28xx_read_ac97(dev, kcontrol->private_value);
- mutex_unlock(&dev->lock);
- if (val < 0)
- return val;
-
- if (val & 0x8000)
- value->value.integer.value[0] = 0;
- else
- value->value.integer.value[0] = 1;
-
- dprintk("%sleft vol %d, right vol %d (0x%04x) from ac97 volume control 0x%04x\n",
- (val & 0x8000) ? "muted " : "",
- 0x1f - ((val >> 8) & 0x1f), 0x1f - (val & 0x1f),
- val, (int)kcontrol->private_value);
-
- return 0;
-}
-
-static const DECLARE_TLV_DB_SCALE(em28xx_db_scale, -3450, 150, 0);
-
-static int em28xx_cvol_new(struct snd_card *card, struct em28xx *dev,
- char *name, int id)
-{
- int err;
- char ctl_name[44];
- struct snd_kcontrol *kctl;
- struct snd_kcontrol_new tmp;
-
- memset (&tmp, 0, sizeof(tmp));
- tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
- tmp.private_value = id,
- tmp.name = ctl_name,
-
- /* Add Mute Control */
- sprintf(ctl_name, "%s Switch", name);
- tmp.get = em28xx_vol_get_mute;
- tmp.put = em28xx_vol_put_mute;
- tmp.info = snd_ctl_boolean_mono_info;
- kctl = snd_ctl_new1(&tmp, dev);
- err = snd_ctl_add(card, kctl);
- if (err < 0)
- return err;
- dprintk("Added control %s for ac97 volume control 0x%04x\n",
- ctl_name, id);
-
- memset (&tmp, 0, sizeof(tmp));
- tmp.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
- tmp.private_value = id,
- tmp.name = ctl_name,
-
- /* Add Volume Control */
- sprintf(ctl_name, "%s Volume", name);
- tmp.get = em28xx_vol_get;
- tmp.put = em28xx_vol_put;
- tmp.info = em28xx_vol_info;
- tmp.tlv.p = em28xx_db_scale,
- kctl = snd_ctl_new1(&tmp, dev);
- err = snd_ctl_add(card, kctl);
- if (err < 0)
- return err;
- dprintk("Added control %s for ac97 volume control 0x%04x\n",
- ctl_name, id);
-
- return 0;
-}
-
-/*
- * register/unregister code and data
- */
-static struct snd_pcm_ops snd_em28xx_pcm_capture = {
- .open = snd_em28xx_capture_open,
- .close = snd_em28xx_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = snd_em28xx_hw_capture_params,
- .hw_free = snd_em28xx_hw_capture_free,
- .prepare = snd_em28xx_prepare,
- .trigger = snd_em28xx_capture_trigger,
- .pointer = snd_em28xx_capture_pointer,
- .page = snd_pcm_get_vmalloc_page,
-};
-
-static int em28xx_audio_init(struct em28xx *dev)
-{
- struct em28xx_audio *adev = &dev->adev;
- struct snd_pcm *pcm;
- struct snd_card *card;
- static int devnr;
- int err;
-
- if (!dev->has_alsa_audio || dev->audio_ifnum < 0) {
- /* This device does not support the extension (in this case
- the device is expecting the snd-usb-audio module or
- doesn't have analog audio support at all) */
- return 0;
- }
-
- printk(KERN_INFO "em28xx-audio.c: probing for em28xx Audio Vendor Class\n");
- printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2006 Markus "
- "Rechberger\n");
- printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2007-2011 Mauro Carvalho Chehab\n");
-
- err = snd_card_create(index[devnr], "Em28xx Audio", THIS_MODULE, 0,
- &card);
- if (err < 0)
- return err;
-
- spin_lock_init(&adev->slock);
- err = snd_pcm_new(card, "Em28xx Audio", 0, 0, 1, &pcm);
- if (err < 0) {
- snd_card_free(card);
- return err;
- }
-
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_em28xx_pcm_capture);
- pcm->info_flags = 0;
- pcm->private_data = dev;
- strcpy(pcm->name, "Empia 28xx Capture");
-
- snd_card_set_dev(card, &dev->udev->dev);
- strcpy(card->driver, "Em28xx-Audio");
- strcpy(card->shortname, "Em28xx Audio");
- strcpy(card->longname, "Empia Em28xx Audio");
-
- INIT_WORK(&dev->wq_trigger, audio_trigger);
-
- if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
- em28xx_cvol_new(card, dev, "Video", AC97_VIDEO);
- em28xx_cvol_new(card, dev, "Line In", AC97_LINE);
- em28xx_cvol_new(card, dev, "Phone", AC97_PHONE);
- em28xx_cvol_new(card, dev, "Microphone", AC97_MIC);
- em28xx_cvol_new(card, dev, "CD", AC97_CD);
- em28xx_cvol_new(card, dev, "AUX", AC97_AUX);
- em28xx_cvol_new(card, dev, "PCM", AC97_PCM);
-
- em28xx_cvol_new(card, dev, "Master", AC97_MASTER);
- em28xx_cvol_new(card, dev, "Line", AC97_HEADPHONE);
- em28xx_cvol_new(card, dev, "Mono", AC97_MASTER_MONO);
- em28xx_cvol_new(card, dev, "LFE", AC97_CENTER_LFE_MASTER);
- em28xx_cvol_new(card, dev, "Surround", AC97_SURROUND_MASTER);
- }
-
- err = snd_card_register(card);
- if (err < 0) {
- snd_card_free(card);
- return err;
- }
- adev->sndcard = card;
- adev->udev = dev->udev;
-
- return 0;
-}
-
-static int em28xx_audio_fini(struct em28xx *dev)
-{
- if (dev == NULL)
- return 0;
-
- if (dev->has_alsa_audio != 1) {
- /* This device does not support the extension (in this case
- the device is expecting the snd-usb-audio module or
- doesn't have analog audio support at all) */
- return 0;
- }
-
- if (dev->adev.sndcard) {
- snd_card_free(dev->adev.sndcard);
- dev->adev.sndcard = NULL;
- }
-
- return 0;
-}
-
-static struct em28xx_ops audio_ops = {
- .id = EM28XX_AUDIO,
- .name = "Em28xx Audio Extension",
- .init = em28xx_audio_init,
- .fini = em28xx_audio_fini,
-};
-
-static int __init em28xx_alsa_register(void)
-{
- return em28xx_register_extension(&audio_ops);
-}
-
-static void __exit em28xx_alsa_unregister(void)
-{
- em28xx_unregister_extension(&audio_ops);
-}
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Markus Rechberger <mrechberger@gmail.com>");
-MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
-MODULE_DESCRIPTION("Em28xx Audio driver");
-
-module_init(em28xx_alsa_register);
-module_exit(em28xx_alsa_unregister);
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-02 14:22:22 +0300