mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 23:15:26 +07:00
a7deca6fa7
Commit 7a6f6c29d2
(cx231xx: use
URB_NO_TRANSFER_DMA_MAP) was intended to avoid mapping the DMA buffer
for URB twice. This works for the URBs allocated with usb_alloc_urb(),
as those are allocated from cohernent DMA pools, but the flag was also
added for the VBI and audio URBs, which have a manually allocated area.
This leaves the random trash in the structure after allocation as the
DMA address, corrupting memory and preventing VBI and audio from
working. Letting the USB core map the buffers solves the problem.
Cc: stable@kernel.org
Signed-off-by: David Dillow <dave@thedillows.org>
Cc: Sri Deevi <srinivasa.deevi@conexant.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
781 lines
19 KiB
C
781 lines
19 KiB
C
/*
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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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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/usb.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/vmalloc.h>
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#include <linux/proc_fs.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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#include "cx231xx.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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#define dprintk(fmt, arg...) do { \
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if (debug) \
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printk(KERN_INFO "cx231xx-audio %s: " fmt, \
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__func__, ##arg); \
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} while (0)
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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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dprintk("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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dprintk("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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dprintk("urb completition error %d.\n", 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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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(substream);
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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(substream);
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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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cx231xx_errdev("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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dprintk("urb completition error %d.\n", 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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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(substream);
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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(substream);
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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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cx231xx_errdev("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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cx231xx_info("%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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cx231xx_errdev("usb_alloc_urb failed!\n");
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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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cx231xx_info("%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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cx231xx_errdev("usb_alloc_urb failed!\n");
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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 int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
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size_t size)
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{
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struct snd_pcm_runtime *runtime = subs->runtime;
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dprintk("Allocating vbuffer\n");
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if (runtime->dma_area) {
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if (runtime->dma_bytes > size)
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return 0;
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vfree(runtime->dma_area);
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}
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runtime->dma_area = vmalloc(size);
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if (!runtime->dma_area)
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return -ENOMEM;
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runtime->dma_bytes = size;
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return 0;
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}
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static 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,
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.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT,
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.rate_min = 48000,
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.rate_max = 48000,
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.channels_min = 2,
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.channels_max = 2,
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.buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */
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.period_bytes_min = 64, /* 12544/2, */
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.period_bytes_max = 12544,
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.periods_min = 2,
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.periods_max = 98, /* 12544, */
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};
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static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream)
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{
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struct cx231xx *dev = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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int ret = 0;
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dprintk("opening device and trying to acquire exclusive lock\n");
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if (!dev) {
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cx231xx_errdev("BUG: cx231xx can't find device struct."
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" Can't proceed with open\n");
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return -ENODEV;
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}
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if (dev->state & DEV_DISCONNECTED) {
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cx231xx_errdev("Can't open. the device was removed.\n");
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return -ENODEV;
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}
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/* Sets volume, mute, etc */
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dev->mute = 0;
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/* set alternate setting for audio interface */
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/* 1 - 48000 samples per sec */
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mutex_lock(&dev->lock);
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if (dev->USE_ISO)
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ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 1);
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else
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ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
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mutex_unlock(&dev->lock);
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if (ret < 0) {
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cx231xx_errdev("failed to set alternate setting !\n");
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return ret;
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}
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runtime->hw = snd_cx231xx_hw_capture;
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mutex_lock(&dev->lock);
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/* inform hardware to start streaming */
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ret = cx231xx_capture_start(dev, 1, Audio);
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dev->adev.users++;
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mutex_unlock(&dev->lock);
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snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
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dev->adev.capture_pcm_substream = substream;
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runtime->private_data = dev;
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return 0;
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}
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static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
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{
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int ret;
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struct cx231xx *dev = snd_pcm_substream_chip(substream);
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dprintk("closing device\n");
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/* inform hardware to stop streaming */
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mutex_lock(&dev->lock);
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ret = cx231xx_capture_start(dev, 0, Audio);
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/* set alternate setting for audio interface */
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/* 1 - 48000 samples per sec */
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ret = cx231xx_set_alt_setting(dev, INDEX_AUDIO, 0);
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if (ret < 0) {
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cx231xx_errdev("failed to set alternate setting !\n");
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mutex_unlock(&dev->lock);
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return ret;
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}
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dev->mute = 1;
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dev->adev.users--;
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mutex_unlock(&dev->lock);
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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");
|
|
if (atomic_read(&dev->stream_started) > 0) {
|
|
atomic_set(&dev->stream_started, 0);
|
|
schedule_work(&dev->wq_trigger);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_cx231xx_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 0
|
|
/* TODO: set up cx231xx 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 ret;
|
|
}
|
|
|
|
static int snd_cx231xx_hw_capture_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct cx231xx *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_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)) {
|
|
dprintk("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 {
|
|
dprintk("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 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_cx231xx_pcm_capture = {
|
|
.open = snd_cx231xx_capture_open,
|
|
.close = snd_cx231xx_pcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = snd_cx231xx_hw_capture_params,
|
|
.hw_free = snd_cx231xx_hw_capture_free,
|
|
.prepare = snd_cx231xx_prepare,
|
|
.trigger = snd_cx231xx_capture_trigger,
|
|
.pointer = snd_cx231xx_capture_pointer,
|
|
.page = snd_pcm_get_vmalloc_page,
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
cx231xx_info("cx231xx-audio.c: probing for cx231xx "
|
|
"non standard usbaudio\n");
|
|
|
|
err = snd_card_create(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) {
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
|
&snd_cx231xx_pcm_capture);
|
|
pcm->info_flags = 0;
|
|
pcm->private_data = dev;
|
|
strcpy(pcm->name, "Conexant cx231xx Capture");
|
|
snd_card_set_dev(card, &dev->udev->dev);
|
|
strcpy(card->driver, "Cx231xx-Audio");
|
|
strcpy(card->shortname, "Cx231xx Audio");
|
|
strcpy(card->longname, "Conexant cx231xx Audio");
|
|
|
|
INIT_WORK(&dev->wq_trigger, audio_trigger);
|
|
|
|
err = snd_card_register(card);
|
|
if (err < 0) {
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
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];
|
|
|
|
adev->end_point_addr =
|
|
le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.
|
|
bEndpointAddress);
|
|
|
|
adev->num_alt = uif->num_altsetting;
|
|
cx231xx_info("EndPoint Addr 0x%x, Alternate settings: %i\n",
|
|
adev->end_point_addr, adev->num_alt);
|
|
adev->alt_max_pkt_size = kmalloc(32 * adev->num_alt, GFP_KERNEL);
|
|
|
|
if (adev->alt_max_pkt_size == NULL) {
|
|
cx231xx_errdev("out of memory!\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = 0; i < adev->num_alt; i++) {
|
|
u16 tmp =
|
|
le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].desc.
|
|
wMaxPacketSize);
|
|
adev->alt_max_pkt_size[i] =
|
|
(tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
|
|
cx231xx_info("Alternate setting %i, max size= %i\n", i,
|
|
adev->alt_max_pkt_size[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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(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);
|