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Diffstat (limited to 'drivers/media/video/em28xx/em28xx-audio.c')
-rw-r--r--drivers/media/video/em28xx/em28xx-audio.c526
1 files changed, 0 insertions, 526 deletions
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c
deleted file mode 100644
index 2ac738fa6a0..00000000000
--- a/drivers/media/video/em28xx/em28xx-audio.c
+++ /dev/null
@@ -1,526 +0,0 @@
-/*
- * Empiatech em28x1 audio extension
- *
- * Copyright (C) 2006 Markus Rechberger <mrechberger@gmail.com>
- *
- * Copyright (C) 2007 Mauro Carvalho Chehab <mchehab@infradead.org>
- * - Port to work with the in-kernel driver
- * - Several cleanups
- *
- * 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 <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_isoc_audio_deinit(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;
- 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;
-
- if (dev->adev.shutdown)
- return;
-
- 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, 0x83);
- 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_isoc_audio_deinit(dev);
-
- return errCode;
- }
- }
-
- return 0;
-}
-
-static int em28xx_cmd(struct em28xx *dev, int cmd, int arg)
-{
- dprintk("%s transfer\n", (dev->adev.capture_stream == STREAM_ON) ?
- "stop" : "start");
-
- switch (cmd) {
- case EM28XX_CAPTURE_STREAM_EN:
- if (dev->adev.capture_stream == STREAM_OFF && arg == 1) {
- dev->adev.capture_stream = STREAM_ON;
- em28xx_init_audio_isoc(dev);
- } else if (dev->adev.capture_stream == STREAM_ON && arg == 0) {
- dev->adev.capture_stream = STREAM_OFF;
- em28xx_isoc_audio_deinit(dev);
- } else {
- printk(KERN_ERR "An underrun very likely occurred. "
- "Ignoring it.\n");
- }
- return 0;
- default:
- return -EINVAL;
- }
-}
-
-static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
- size_t size)
-{
- struct snd_pcm_runtime *runtime = subs->runtime;
-
- dprintk("Alocating 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_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) {
- printk(KERN_ERR "BUG: em28xx can't find device struct."
- " Can't proceed with open\n");
- return -ENODEV;
- }
-
- /* Sets volume, mute, etc */
-
- dev->mute = 0;
- mutex_lock(&dev->lock);
- ret = em28xx_audio_analog_set(dev);
- mutex_unlock(&dev->lock);
- if (ret < 0)
- goto err;
-
- runtime->hw = snd_em28xx_hw_capture;
- if (dev->alt == 0 && dev->adev.users == 0) {
- int errCode;
- dev->alt = 7;
- errCode = usb_set_interface(dev->udev, 0, 7);
- dprintk("changing alternate number to 7\n");
- }
-
- dev->adev.users++;
-
- snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
- dev->adev.capture_pcm_substream = substream;
- runtime->private_data = dev;
-
- return 0;
-err:
- printk(KERN_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);
- dev->adev.users--;
-
- dprintk("closing device\n");
-
- dev->mute = 1;
- mutex_lock(&dev->lock);
- em28xx_audio_analog_set(dev);
- mutex_unlock(&dev->lock);
-
- if (dev->adev.users == 0 && dev->adev.shutdown == 1) {
- dprintk("audio users: %d\n", dev->adev.users);
- dprintk("disabling audio stream!\n");
- dev->adev.shutdown = 0;
- dprintk("released lock\n");
- em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 0);
- }
- return 0;
-}
-
-static int snd_em28xx_hw_capture_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- unsigned int channels, rate, format;
- int ret;
-
- dprintk("Setting capture parameters\n");
-
- ret = snd_pcm_alloc_vmalloc_buffer(substream,
- params_buffer_bytes(hw_params));
- format = params_format(hw_params);
- rate = params_rate(hw_params);
- channels = params_channels(hw_params);
-
- /* 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 */
- 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 (dev->adev.capture_stream == STREAM_ON)
- em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 0);
-
- return 0;
-}
-
-static int snd_em28xx_prepare(struct snd_pcm_substream *substream)
-{
- return 0;
-}
-
-static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream,
- int cmd)
-{
- struct em28xx *dev = snd_pcm_substream_chip(substream);
-
- dprintk("Should %s capture\n", (cmd == SNDRV_PCM_TRIGGER_START)?
- "start": "stop");
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- em28xx_cmd(dev, EM28XX_CAPTURE_STREAM_EN, 1);
- return 0;
- case SNDRV_PCM_TRIGGER_STOP:
- dev->adev.shutdown = 1;
- return 0;
- default:
- return -EINVAL;
- }
-}
-
-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);
-}
-
-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 != 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;
- }
-
- printk(KERN_INFO "em28xx-audio.c: probing for em28x1 "
- "non standard usbaudio\n");
- printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2006 Markus "
- "Rechberger\n");
-
- card = snd_card_new(index[devnr], "Em28xx Audio", THIS_MODULE, 0);
- if (card == NULL)
- return -ENOMEM;
-
- 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, "Empia Em28xx Audio");
- strcpy(card->shortname, "Em28xx Audio");
- strcpy(card->longname, "Empia Em28xx Audio");
-
- 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@infradead.org>");
-MODULE_DESCRIPTION("Em28xx Audio driver");
-
-module_init(em28xx_alsa_register);
-module_exit(em28xx_alsa_unregister);
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