704 lines
17 KiB
C
704 lines
17 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Conexant Cx231xx audio extension
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*
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* Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
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* Based on em28xx driver
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*/
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#include "cx231xx.h"
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sound.h>
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#include <linux/spinlock.h>
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#include <linux/soundcard.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/info.h>
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#include <sound/initval.h>
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#include <sound/control.h>
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#include <media/v4l2-common.h>
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "activates debug info");
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
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static int cx231xx_isoc_audio_deinit(struct cx231xx *dev)
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{
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int i;
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dev_dbg(dev->dev, "Stopping isoc\n");
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
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if (dev->adev.urb[i]) {
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if (!irqs_disabled())
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usb_kill_urb(dev->adev.urb[i]);
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else
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usb_unlink_urb(dev->adev.urb[i]);
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usb_free_urb(dev->adev.urb[i]);
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dev->adev.urb[i] = NULL;
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kfree(dev->adev.transfer_buffer[i]);
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dev->adev.transfer_buffer[i] = NULL;
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}
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}
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return 0;
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}
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static int cx231xx_bulk_audio_deinit(struct cx231xx *dev)
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{
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int i;
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dev_dbg(dev->dev, "Stopping bulk\n");
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
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if (dev->adev.urb[i]) {
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if (!irqs_disabled())
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usb_kill_urb(dev->adev.urb[i]);
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else
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usb_unlink_urb(dev->adev.urb[i]);
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usb_free_urb(dev->adev.urb[i]);
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dev->adev.urb[i] = NULL;
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kfree(dev->adev.transfer_buffer[i]);
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dev->adev.transfer_buffer[i] = NULL;
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}
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}
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return 0;
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}
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static void cx231xx_audio_isocirq(struct urb *urb)
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{
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struct cx231xx *dev = urb->context;
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int i;
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unsigned int oldptr;
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int period_elapsed = 0;
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int status;
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unsigned char *cp;
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unsigned int stride;
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struct snd_pcm_substream *substream;
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struct snd_pcm_runtime *runtime;
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if (dev->state & DEV_DISCONNECTED)
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return;
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switch (urb->status) {
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case 0: /* success */
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case -ETIMEDOUT: /* NAK */
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break;
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case -ECONNRESET: /* kill */
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case -ENOENT:
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case -ESHUTDOWN:
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return;
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default: /* error */
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dev_dbg(dev->dev, "urb completion error %d.\n",
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urb->status);
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break;
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}
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if (atomic_read(&dev->stream_started) == 0)
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return;
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if (dev->adev.capture_pcm_substream) {
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substream = dev->adev.capture_pcm_substream;
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runtime = substream->runtime;
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stride = runtime->frame_bits >> 3;
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for (i = 0; i < urb->number_of_packets; i++) {
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unsigned long flags;
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int length = urb->iso_frame_desc[i].actual_length /
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stride;
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cp = (unsigned char *)urb->transfer_buffer +
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urb->iso_frame_desc[i].offset;
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if (!length)
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continue;
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oldptr = dev->adev.hwptr_done_capture;
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if (oldptr + length >= runtime->buffer_size) {
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unsigned int cnt;
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cnt = runtime->buffer_size - oldptr;
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memcpy(runtime->dma_area + oldptr * stride, cp,
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cnt * stride);
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memcpy(runtime->dma_area, cp + cnt * stride,
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length * stride - cnt * stride);
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} else {
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memcpy(runtime->dma_area + oldptr * stride, cp,
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length * stride);
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}
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snd_pcm_stream_lock_irqsave(substream, flags);
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dev->adev.hwptr_done_capture += length;
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if (dev->adev.hwptr_done_capture >=
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runtime->buffer_size)
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dev->adev.hwptr_done_capture -=
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runtime->buffer_size;
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dev->adev.capture_transfer_done += length;
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if (dev->adev.capture_transfer_done >=
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runtime->period_size) {
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dev->adev.capture_transfer_done -=
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runtime->period_size;
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period_elapsed = 1;
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}
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snd_pcm_stream_unlock_irqrestore(substream, flags);
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}
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if (period_elapsed)
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snd_pcm_period_elapsed(substream);
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}
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urb->status = 0;
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status = usb_submit_urb(urb, GFP_ATOMIC);
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if (status < 0) {
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dev_err(dev->dev,
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"resubmit of audio urb failed (error=%i)\n",
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status);
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}
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return;
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}
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static void cx231xx_audio_bulkirq(struct urb *urb)
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{
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struct cx231xx *dev = urb->context;
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unsigned int oldptr;
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int period_elapsed = 0;
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int status;
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unsigned char *cp;
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unsigned int stride;
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struct snd_pcm_substream *substream;
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struct snd_pcm_runtime *runtime;
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if (dev->state & DEV_DISCONNECTED)
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return;
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switch (urb->status) {
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case 0: /* success */
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case -ETIMEDOUT: /* NAK */
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break;
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case -ECONNRESET: /* kill */
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case -ENOENT:
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case -ESHUTDOWN:
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return;
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default: /* error */
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dev_dbg(dev->dev, "urb completion error %d.\n",
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urb->status);
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break;
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}
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if (atomic_read(&dev->stream_started) == 0)
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return;
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if (dev->adev.capture_pcm_substream) {
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substream = dev->adev.capture_pcm_substream;
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runtime = substream->runtime;
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stride = runtime->frame_bits >> 3;
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if (1) {
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unsigned long flags;
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int length = urb->actual_length /
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stride;
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cp = (unsigned char *)urb->transfer_buffer;
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oldptr = dev->adev.hwptr_done_capture;
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if (oldptr + length >= runtime->buffer_size) {
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unsigned int cnt;
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cnt = runtime->buffer_size - oldptr;
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memcpy(runtime->dma_area + oldptr * stride, cp,
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cnt * stride);
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memcpy(runtime->dma_area, cp + cnt * stride,
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length * stride - cnt * stride);
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} else {
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memcpy(runtime->dma_area + oldptr * stride, cp,
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length * stride);
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}
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snd_pcm_stream_lock_irqsave(substream, flags);
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dev->adev.hwptr_done_capture += length;
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if (dev->adev.hwptr_done_capture >=
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runtime->buffer_size)
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dev->adev.hwptr_done_capture -=
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runtime->buffer_size;
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dev->adev.capture_transfer_done += length;
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if (dev->adev.capture_transfer_done >=
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runtime->period_size) {
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dev->adev.capture_transfer_done -=
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runtime->period_size;
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period_elapsed = 1;
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}
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snd_pcm_stream_unlock_irqrestore(substream, flags);
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}
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if (period_elapsed)
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snd_pcm_period_elapsed(substream);
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}
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urb->status = 0;
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status = usb_submit_urb(urb, GFP_ATOMIC);
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if (status < 0) {
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dev_err(dev->dev,
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"resubmit of audio urb failed (error=%i)\n",
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status);
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}
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return;
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}
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static int cx231xx_init_audio_isoc(struct cx231xx *dev)
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{
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int i, errCode;
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int sb_size;
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dev_dbg(dev->dev,
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"%s: Starting ISO AUDIO transfers\n", __func__);
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if (dev->state & DEV_DISCONNECTED)
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return -ENODEV;
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sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
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struct urb *urb;
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int j, k;
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dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
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if (!dev->adev.transfer_buffer[i])
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return -ENOMEM;
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memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
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urb = usb_alloc_urb(CX231XX_ISO_NUM_AUDIO_PACKETS, GFP_ATOMIC);
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if (!urb) {
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for (j = 0; j < i; j++) {
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usb_free_urb(dev->adev.urb[j]);
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kfree(dev->adev.transfer_buffer[j]);
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}
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return -ENOMEM;
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}
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urb->dev = dev->udev;
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urb->context = dev;
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urb->pipe = usb_rcvisocpipe(dev->udev,
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dev->adev.end_point_addr);
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urb->transfer_flags = URB_ISO_ASAP;
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urb->transfer_buffer = dev->adev.transfer_buffer[i];
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urb->interval = 1;
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urb->complete = cx231xx_audio_isocirq;
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urb->number_of_packets = CX231XX_ISO_NUM_AUDIO_PACKETS;
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urb->transfer_buffer_length = sb_size;
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for (j = k = 0; j < CX231XX_ISO_NUM_AUDIO_PACKETS;
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j++, k += dev->adev.max_pkt_size) {
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urb->iso_frame_desc[j].offset = k;
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urb->iso_frame_desc[j].length = dev->adev.max_pkt_size;
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}
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dev->adev.urb[i] = urb;
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}
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
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errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
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if (errCode < 0) {
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cx231xx_isoc_audio_deinit(dev);
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return errCode;
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}
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}
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return errCode;
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}
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static int cx231xx_init_audio_bulk(struct cx231xx *dev)
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{
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int i, errCode;
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int sb_size;
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dev_dbg(dev->dev,
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"%s: Starting BULK AUDIO transfers\n", __func__);
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if (dev->state & DEV_DISCONNECTED)
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return -ENODEV;
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sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size;
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
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struct urb *urb;
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int j;
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dev->adev.transfer_buffer[i] = kmalloc(sb_size, GFP_ATOMIC);
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if (!dev->adev.transfer_buffer[i])
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return -ENOMEM;
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memset(dev->adev.transfer_buffer[i], 0x80, sb_size);
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urb = usb_alloc_urb(CX231XX_NUM_AUDIO_PACKETS, GFP_ATOMIC);
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if (!urb) {
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for (j = 0; j < i; j++) {
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usb_free_urb(dev->adev.urb[j]);
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kfree(dev->adev.transfer_buffer[j]);
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}
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return -ENOMEM;
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}
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urb->dev = dev->udev;
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urb->context = dev;
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urb->pipe = usb_rcvbulkpipe(dev->udev,
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dev->adev.end_point_addr);
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urb->transfer_flags = 0;
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urb->transfer_buffer = dev->adev.transfer_buffer[i];
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urb->complete = cx231xx_audio_bulkirq;
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urb->transfer_buffer_length = sb_size;
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dev->adev.urb[i] = urb;
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}
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for (i = 0; i < CX231XX_AUDIO_BUFS; i++) {
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errCode = usb_submit_urb(dev->adev.urb[i], GFP_ATOMIC);
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if (errCode < 0) {
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cx231xx_bulk_audio_deinit(dev);
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return errCode;
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}
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}
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return errCode;
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}
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static const struct snd_pcm_hardware snd_cx231xx_hw_capture = {
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.info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_MMAP_VALID,
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|
.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_cx231xx_capture_open(struct snd_pcm_substream *substream)
|
||
|
|
{
|
||
|
|
struct cx231xx *dev = snd_pcm_substream_chip(substream);
|
||
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
||
|
|
int ret = 0;
|
||
|
|
|
||
|
|
dev_dbg(dev->dev,
|
||
|
|
"opening device and trying to acquire exclusive lock\n");
|
||
|
|
|
||
|
|
if (dev->state & DEV_DISCONNECTED) {
|
||
|
|
dev_err(dev->dev,
|
||
|
|
"Can't open. the device was removed.\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set alternate setting for audio interface */
|
||
|
|
/* 1 - 48000 samples per sec */
|
||
|
|
mutex_lock(&dev->lock);
|
||
|
|
if (dev->USE_ISO)
|
||
|
|
ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1);
|
||
|
|
else
|
||
|
|
ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
|
||
|
|
mutex_unlock(&dev->lock);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(dev->dev,
|
||
|
|
"failed to set alternate setting !\n");
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
runtime->hw = snd_cx231xx_hw_capture;
|
||
|
|
|
||
|
|
mutex_lock(&dev->lock);
|
||
|
|
/* inform hardware to start streaming */
|
||
|
|
ret = cx231xx_capture_start(dev, 1, Audio);
|
||
|
|
|
||
|
|
dev->adev.users++;
|
||
|
|
mutex_unlock(&dev->lock);
|
||
|
|
|
||
|
|
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
|
||
|
|
dev->adev.capture_pcm_substream = substream;
|
||
|
|
runtime->private_data = dev;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct cx231xx *dev = snd_pcm_substream_chip(substream);
|
||
|
|
|
||
|
|
dev_dbg(dev->dev, "closing device\n");
|
||
|
|
|
||
|
|
/* inform hardware to stop streaming */
|
||
|
|
mutex_lock(&dev->lock);
|
||
|
|
ret = cx231xx_capture_start(dev, 0, Audio);
|
||
|
|
|
||
|
|
/* set alternate setting for audio interface */
|
||
|
|
/* 1 - 48000 samples per sec */
|
||
|
|
ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(dev->dev,
|
||
|
|
"failed to set alternate setting !\n");
|
||
|
|
|
||
|
|
mutex_unlock(&dev->lock);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev->adev.users--;
|
||
|
|
mutex_unlock(&dev->lock);
|
||
|
|
|
||
|
|
if (dev->adev.users == 0 && dev->adev.shutdown == 1) {
|
||
|
|
dev_dbg(dev->dev, "audio users: %d\n", dev->adev.users);
|
||
|
|
dev_dbg(dev->dev, "disabling audio stream!\n");
|
||
|
|
dev->adev.shutdown = 0;
|
||
|
|
dev_dbg(dev->dev, "released lock\n");
|
||
|
|
if (atomic_read(&dev->stream_started) > 0) {
|
||
|
|
atomic_set(&dev->stream_started, 0);
|
||
|
|
schedule_work(&dev->wq_trigger);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_cx231xx_prepare(struct snd_pcm_substream *substream)
|
||
|
|
{
|
||
|
|
struct cx231xx *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 cx231xx *dev = container_of(work, struct cx231xx, wq_trigger);
|
||
|
|
|
||
|
|
if (atomic_read(&dev->stream_started)) {
|
||
|
|
dev_dbg(dev->dev, "starting capture");
|
||
|
|
if (is_fw_load(dev) == 0)
|
||
|
|
cx25840_call(dev, core, load_fw);
|
||
|
|
if (dev->USE_ISO)
|
||
|
|
cx231xx_init_audio_isoc(dev);
|
||
|
|
else
|
||
|
|
cx231xx_init_audio_bulk(dev);
|
||
|
|
} else {
|
||
|
|
dev_dbg(dev->dev, "stopping capture");
|
||
|
|
cx231xx_isoc_audio_deinit(dev);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream,
|
||
|
|
int cmd)
|
||
|
|
{
|
||
|
|
struct cx231xx *dev = snd_pcm_substream_chip(substream);
|
||
|
|
int retval = 0;
|
||
|
|
|
||
|
|
if (dev->state & DEV_DISCONNECTED)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
spin_lock(&dev->adev.slock);
|
||
|
|
switch (cmd) {
|
||
|
|
case SNDRV_PCM_TRIGGER_START:
|
||
|
|
atomic_set(&dev->stream_started, 1);
|
||
|
|
break;
|
||
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
||
|
|
atomic_set(&dev->stream_started, 0);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
retval = -EINVAL;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
spin_unlock(&dev->adev.slock);
|
||
|
|
|
||
|
|
schedule_work(&dev->wq_trigger);
|
||
|
|
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
static snd_pcm_uframes_t snd_cx231xx_capture_pointer(struct snd_pcm_substream
|
||
|
|
*substream)
|
||
|
|
{
|
||
|
|
struct cx231xx *dev;
|
||
|
|
unsigned long flags;
|
||
|
|
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 const struct snd_pcm_ops snd_cx231xx_pcm_capture = {
|
||
|
|
.open = snd_cx231xx_capture_open,
|
||
|
|
.close = snd_cx231xx_pcm_close,
|
||
|
|
.prepare = snd_cx231xx_prepare,
|
||
|
|
.trigger = snd_cx231xx_capture_trigger,
|
||
|
|
.pointer = snd_cx231xx_capture_pointer,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int cx231xx_audio_init(struct cx231xx *dev)
|
||
|
|
{
|
||
|
|
struct cx231xx_audio *adev = &dev->adev;
|
||
|
|
struct snd_pcm *pcm;
|
||
|
|
struct snd_card *card;
|
||
|
|
static int devnr;
|
||
|
|
int err;
|
||
|
|
struct usb_interface *uif;
|
||
|
|
int i, isoc_pipe = 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_dbg(dev->dev,
|
||
|
|
"probing for cx231xx non standard usbaudio\n");
|
||
|
|
|
||
|
|
err = snd_card_new(dev->dev, index[devnr], "Cx231xx Audio",
|
||
|
|
THIS_MODULE, 0, &card);
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
spin_lock_init(&adev->slock);
|
||
|
|
err = snd_pcm_new(card, "Cx231xx Audio", 0, 0, 1, &pcm);
|
||
|
|
if (err < 0)
|
||
|
|
goto err_free_card;
|
||
|
|
|
||
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
||
|
|
&snd_cx231xx_pcm_capture);
|
||
|
|
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
|
||
|
|
pcm->info_flags = 0;
|
||
|
|
pcm->private_data = dev;
|
||
|
|
strscpy(pcm->name, "Conexant cx231xx Capture", sizeof(pcm->name));
|
||
|
|
strscpy(card->driver, "Cx231xx-Audio", sizeof(card->driver));
|
||
|
|
strscpy(card->shortname, "Cx231xx Audio", sizeof(card->shortname));
|
||
|
|
strscpy(card->longname, "Conexant cx231xx Audio", sizeof(card->longname));
|
||
|
|
|
||
|
|
INIT_WORK(&dev->wq_trigger, audio_trigger);
|
||
|
|
|
||
|
|
err = snd_card_register(card);
|
||
|
|
if (err < 0)
|
||
|
|
goto err_free_card;
|
||
|
|
|
||
|
|
adev->sndcard = card;
|
||
|
|
adev->udev = dev->udev;
|
||
|
|
|
||
|
|
/* compute alternate max packet sizes for Audio */
|
||
|
|
uif =
|
||
|
|
dev->udev->actconfig->interface[dev->current_pcb_config.
|
||
|
|
hs_config_info[0].interface_info.
|
||
|
|
audio_index + 1];
|
||
|
|
|
||
|
|
if (uif->altsetting[0].desc.bNumEndpoints < isoc_pipe + 1) {
|
||
|
|
err = -ENODEV;
|
||
|
|
goto err_free_card;
|
||
|
|
}
|
||
|
|
|
||
|
|
adev->end_point_addr =
|
||
|
|
uif->altsetting[0].endpoint[isoc_pipe].desc.
|
||
|
|
bEndpointAddress;
|
||
|
|
|
||
|
|
adev->num_alt = uif->num_altsetting;
|
||
|
|
dev_info(dev->dev,
|
||
|
|
"audio EndPoint Addr 0x%x, Alternate settings: %i\n",
|
||
|
|
adev->end_point_addr, adev->num_alt);
|
||
|
|
adev->alt_max_pkt_size = kmalloc_array(32, adev->num_alt, GFP_KERNEL);
|
||
|
|
if (!adev->alt_max_pkt_size) {
|
||
|
|
err = -ENOMEM;
|
||
|
|
goto err_free_card;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < adev->num_alt; i++) {
|
||
|
|
u16 tmp;
|
||
|
|
|
||
|
|
if (uif->altsetting[i].desc.bNumEndpoints < isoc_pipe + 1) {
|
||
|
|
err = -ENODEV;
|
||
|
|
goto err_free_pkt_size;
|
||
|
|
}
|
||
|
|
|
||
|
|
tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
|
||
|
|
wMaxPacketSize);
|
||
|
|
adev->alt_max_pkt_size[i] =
|
||
|
|
(tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
|
||
|
|
dev_dbg(dev->dev,
|
||
|
|
"audio alternate setting %i, max size= %i\n", i,
|
||
|
|
adev->alt_max_pkt_size[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_free_pkt_size:
|
||
|
|
kfree(adev->alt_max_pkt_size);
|
||
|
|
err_free_card:
|
||
|
|
snd_card_free(card);
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cx231xx_audio_fini(struct cx231xx *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_when_closed(dev->adev.sndcard);
|
||
|
|
kfree(dev->adev.alt_max_pkt_size);
|
||
|
|
dev->adev.sndcard = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct cx231xx_ops audio_ops = {
|
||
|
|
.id = CX231XX_AUDIO,
|
||
|
|
.name = "Cx231xx Audio Extension",
|
||
|
|
.init = cx231xx_audio_init,
|
||
|
|
.fini = cx231xx_audio_fini,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init cx231xx_alsa_register(void)
|
||
|
|
{
|
||
|
|
return cx231xx_register_extension(&audio_ops);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit cx231xx_alsa_unregister(void)
|
||
|
|
{
|
||
|
|
cx231xx_unregister_extension(&audio_ops);
|
||
|
|
}
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
|
||
|
|
MODULE_DESCRIPTION("Cx231xx Audio driver");
|
||
|
|
|
||
|
|
module_init(cx231xx_alsa_register);
|
||
|
|
module_exit(cx231xx_alsa_unregister);
|