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![Tomas Winkler](/assets/img/avatar_default.png)
Reshuffle error handling to reduce indentation nesting This reduce number of lines exceeding 80 characters from 41 to 15 use: if (error) (return, goto, continue) CODE instead of: if (good) <CODE> else <EXCEPTION HANDLING> Cc: Dan Carpenter <error27@gmail.com> Cc: Mike Thomas <rmthomas@sciolus.org> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
854 lines
24 KiB
C
854 lines
24 KiB
C
/******************************************************************************
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* *
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* easycap_sound.c *
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* *
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* Audio driver for EasyCAP USB2.0 Video Capture Device DC60 *
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* *
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* *
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******************************************************************************/
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/*
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*
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* Copyright (C) 2010 R.M. Thomas <rmthomas@sciolus.org>
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*
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*
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* This 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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* The software 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 software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*****************************************************************************/
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#include "easycap.h"
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#ifndef CONFIG_EASYCAP_OSS
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/*--------------------------------------------------------------------------*/
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/*
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* PARAMETERS USED WHEN REGISTERING THE AUDIO INTERFACE
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*/
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/*--------------------------------------------------------------------------*/
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static const struct snd_pcm_hardware alsa_hardware = {
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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_32000 | SNDRV_PCM_RATE_48000,
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.rate_min = 32000,
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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 = PAGE_SIZE *
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PAGES_PER_AUDIO_FRAGMENT *
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AUDIO_FRAGMENT_MANY,
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.period_bytes_min = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT,
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.period_bytes_max = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT * 2,
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.periods_min = AUDIO_FRAGMENT_MANY,
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.periods_max = AUDIO_FRAGMENT_MANY * 2,
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};
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/*****************************************************************************/
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/*---------------------------------------------------------------------------*/
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/*
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* ON COMPLETION OF AN AUDIO URB ITS DATA IS COPIED TO THE DAM BUFFER
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* PROVIDED peasycap->audio_idle IS ZERO. REGARDLESS OF THIS BEING TRUE,
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* IT IS RESUBMITTED PROVIDED peasycap->audio_isoc_streaming IS NOT ZERO.
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*/
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/*---------------------------------------------------------------------------*/
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void
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easycap_alsa_complete(struct urb *purb)
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{
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struct easycap *peasycap;
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struct snd_pcm_substream *pss;
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struct snd_pcm_runtime *prt;
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int dma_bytes, fragment_bytes;
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int isfragment;
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u8 *p1, *p2;
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s16 tmp;
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int i, j, more, much, rc;
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#ifdef UPSAMPLE
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int k;
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s16 oldaudio, newaudio, delta;
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#endif /*UPSAMPLE*/
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JOT(16, "\n");
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if (!purb) {
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SAY("ERROR: purb is NULL\n");
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return;
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}
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peasycap = purb->context;
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if (!peasycap) {
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SAY("ERROR: peasycap is NULL\n");
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return;
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}
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if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
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SAY("ERROR: bad peasycap\n");
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return;
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}
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much = 0;
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if (peasycap->audio_idle) {
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JOM(16, "%i=audio_idle %i=audio_isoc_streaming\n",
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peasycap->audio_idle, peasycap->audio_isoc_streaming);
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if (peasycap->audio_isoc_streaming)
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goto resubmit;
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}
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/*---------------------------------------------------------------------------*/
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pss = peasycap->psubstream;
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if (!pss)
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goto resubmit;
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prt = pss->runtime;
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if (!prt)
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goto resubmit;
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dma_bytes = (int)prt->dma_bytes;
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if (0 == dma_bytes)
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goto resubmit;
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fragment_bytes = 4 * ((int)prt->period_size);
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if (0 == fragment_bytes)
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goto resubmit;
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/* -------------------------------------------------------------------------*/
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if (purb->status) {
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if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) {
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JOM(16, "urb status -ESHUTDOWN or -ENOENT\n");
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return;
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}
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SAM("ERROR: non-zero urb status: -%s: %d\n",
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strerror(purb->status), purb->status);
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goto resubmit;
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}
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/*---------------------------------------------------------------------------*/
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/*
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* PROCEED HERE WHEN NO ERROR
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*/
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/*---------------------------------------------------------------------------*/
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#ifdef UPSAMPLE
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oldaudio = peasycap->oldaudio;
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#endif /*UPSAMPLE*/
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for (i = 0; i < purb->number_of_packets; i++) {
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if (purb->iso_frame_desc[i].status < 0) {
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SAM("-%s: %d\n",
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strerror(purb->iso_frame_desc[i].status),
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purb->iso_frame_desc[i].status);
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}
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if (purb->iso_frame_desc[i].status) {
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JOM(12, "discarding audio samples because "
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"%i=purb->iso_frame_desc[i].status\n",
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purb->iso_frame_desc[i].status);
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continue;
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}
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more = purb->iso_frame_desc[i].actual_length;
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if (more == 0) {
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peasycap->audio_mt++;
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continue;
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}
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if (0 > more) {
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SAM("MISTAKE: more is negative\n");
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return;
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}
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if (peasycap->audio_mt) {
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JOM(12, "%4i empty audio urb frames\n",
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peasycap->audio_mt);
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peasycap->audio_mt = 0;
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}
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p1 = (u8 *)(purb->transfer_buffer +
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purb->iso_frame_desc[i].offset);
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/*
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* COPY more BYTES FROM ISOC BUFFER
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* TO THE DMA BUFFER, CONVERTING
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* 8-BIT MONO TO 16-BIT SIGNED
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* LITTLE-ENDIAN SAMPLES IF NECESSARY
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*/
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while (more) {
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much = dma_bytes - peasycap->dma_fill;
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if (0 > much) {
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SAM("MISTAKE: much is negative\n");
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return;
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}
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if (0 == much) {
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peasycap->dma_fill = 0;
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peasycap->dma_next = fragment_bytes;
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JOM(8, "wrapped dma buffer\n");
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}
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if (!peasycap->microphone) {
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if (much > more)
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much = more;
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memcpy(prt->dma_area + peasycap->dma_fill,
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p1, much);
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p1 += much;
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more -= much;
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} else {
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#ifdef UPSAMPLE
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if (much % 16)
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JOM(8, "MISTAKE? much"
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" is not divisible by 16\n");
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if (much > (16 * more))
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much = 16 * more;
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p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
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for (j = 0; j < (much / 16); j++) {
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newaudio = ((int) *p1) - 128;
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newaudio = 128 * newaudio;
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delta = (newaudio - oldaudio) / 4;
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tmp = oldaudio + delta;
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for (k = 0; k < 4; k++) {
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*p2 = (0x00FF & tmp);
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*(p2 + 1) = (0xFF00 & tmp) >> 8;
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p2 += 2;
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*p2 = (0x00FF & tmp);
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*(p2 + 1) = (0xFF00 & tmp) >> 8;
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p2 += 2;
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tmp += delta;
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}
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p1++;
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more--;
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oldaudio = tmp;
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}
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#else /*!UPSAMPLE*/
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if (much > (2 * more))
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much = 2 * more;
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p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
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for (j = 0; j < (much / 2); j++) {
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tmp = ((int) *p1) - 128;
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tmp = 128 * tmp;
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*p2 = (0x00FF & tmp);
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*(p2 + 1) = (0xFF00 & tmp) >> 8;
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p1++;
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p2 += 2;
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more--;
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}
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#endif /*UPSAMPLE*/
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}
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peasycap->dma_fill += much;
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if (peasycap->dma_fill >= peasycap->dma_next) {
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isfragment = peasycap->dma_fill / fragment_bytes;
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if (0 > isfragment) {
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SAM("MISTAKE: isfragment is negative\n");
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return;
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}
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peasycap->dma_read = (isfragment - 1) * fragment_bytes;
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peasycap->dma_next = (isfragment + 1) * fragment_bytes;
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if (dma_bytes < peasycap->dma_next)
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peasycap->dma_next = fragment_bytes;
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if (0 <= peasycap->dma_read) {
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JOM(8, "snd_pcm_period_elapsed(), %i="
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"isfragment\n", isfragment);
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snd_pcm_period_elapsed(pss);
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}
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}
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}
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#ifdef UPSAMPLE
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peasycap->oldaudio = oldaudio;
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#endif /*UPSAMPLE*/
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}
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/*---------------------------------------------------------------------------*/
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/*
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* RESUBMIT THIS URB
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*/
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/*---------------------------------------------------------------------------*/
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resubmit:
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if (peasycap->audio_isoc_streaming == 0)
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return;
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rc = usb_submit_urb(purb, GFP_ATOMIC);
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if (rc) {
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if ((-ENODEV != rc) && (-ENOENT != rc)) {
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SAM("ERROR: while %i=audio_idle, usb_submit_urb failed "
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"with rc: -%s :%d\n",
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peasycap->audio_idle, strerror(rc), rc);
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}
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if (0 < peasycap->audio_isoc_streaming)
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peasycap->audio_isoc_streaming--;
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}
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return;
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}
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/*****************************************************************************/
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static int easycap_alsa_open(struct snd_pcm_substream *pss)
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{
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struct snd_pcm *psnd_pcm;
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struct snd_card *psnd_card;
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struct easycap *peasycap;
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JOT(4, "\n");
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if (!pss) {
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SAY("ERROR: pss is NULL\n");
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return -EFAULT;
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}
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psnd_pcm = pss->pcm;
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if (!psnd_pcm) {
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SAY("ERROR: psnd_pcm is NULL\n");
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return -EFAULT;
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}
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psnd_card = psnd_pcm->card;
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if (!psnd_card) {
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SAY("ERROR: psnd_card is NULL\n");
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return -EFAULT;
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}
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peasycap = psnd_card->private_data;
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if (!peasycap) {
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SAY("ERROR: peasycap is NULL\n");
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return -EFAULT;
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}
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if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
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SAY("ERROR: bad peasycap\n");
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return -EFAULT;
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}
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if (peasycap->psnd_card != psnd_card) {
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SAM("ERROR: bad peasycap->psnd_card\n");
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return -EFAULT;
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}
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if (peasycap->psubstream) {
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SAM("ERROR: bad peasycap->psubstream\n");
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return -EFAULT;
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}
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pss->private_data = peasycap;
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peasycap->psubstream = pss;
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pss->runtime->hw = peasycap->alsa_hardware;
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pss->runtime->private_data = peasycap;
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pss->private_data = peasycap;
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if (0 != easycap_sound_setup(peasycap)) {
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JOM(4, "ending unsuccessfully\n");
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return -EFAULT;
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}
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JOM(4, "ending successfully\n");
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return 0;
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}
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/*****************************************************************************/
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static int easycap_alsa_close(struct snd_pcm_substream *pss)
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{
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struct easycap *peasycap;
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JOT(4, "\n");
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if (!pss) {
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SAY("ERROR: pss is NULL\n");
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return -EFAULT;
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}
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peasycap = snd_pcm_substream_chip(pss);
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if (!peasycap) {
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SAY("ERROR: peasycap is NULL\n");
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return -EFAULT;
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}
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if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
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SAY("ERROR: bad peasycap\n");
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return -EFAULT;
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}
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pss->private_data = NULL;
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peasycap->psubstream = NULL;
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JOT(4, "ending successfully\n");
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return 0;
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}
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/*****************************************************************************/
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static int easycap_alsa_vmalloc(struct snd_pcm_substream *pss, size_t sz)
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{
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struct snd_pcm_runtime *prt;
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JOT(4, "\n");
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if (!pss) {
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SAY("ERROR: pss is NULL\n");
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return -EFAULT;
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}
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prt = pss->runtime;
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if (!prt) {
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SAY("ERROR: substream.runtime is NULL\n");
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return -EFAULT;
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}
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if (prt->dma_area) {
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if (prt->dma_bytes > sz)
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return 0;
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vfree(prt->dma_area);
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}
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prt->dma_area = vmalloc(sz);
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if (!prt->dma_area)
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return -ENOMEM;
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prt->dma_bytes = sz;
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return 0;
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}
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/*****************************************************************************/
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static int easycap_alsa_hw_params(struct snd_pcm_substream *pss,
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struct snd_pcm_hw_params *phw)
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{
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int rc;
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JOT(4, "%i\n", (params_buffer_bytes(phw)));
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if (!pss) {
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SAY("ERROR: pss is NULL\n");
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return -EFAULT;
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}
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rc = easycap_alsa_vmalloc(pss, params_buffer_bytes(phw));
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if (rc)
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return rc;
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return 0;
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}
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/*****************************************************************************/
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static int easycap_alsa_hw_free(struct snd_pcm_substream *pss)
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{
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struct snd_pcm_runtime *prt;
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JOT(4, "\n");
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if (!pss) {
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SAY("ERROR: pss is NULL\n");
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return -EFAULT;
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}
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prt = pss->runtime;
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if (!prt) {
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SAY("ERROR: substream.runtime is NULL\n");
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return -EFAULT;
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}
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if (prt->dma_area) {
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JOT(8, "prt->dma_area = %p\n", prt->dma_area);
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vfree(prt->dma_area);
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prt->dma_area = NULL;
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} else
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JOT(8, "dma_area already freed\n");
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return 0;
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}
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/*****************************************************************************/
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static int easycap_alsa_prepare(struct snd_pcm_substream *pss)
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{
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struct easycap *peasycap;
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struct snd_pcm_runtime *prt;
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JOT(4, "\n");
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if (!pss) {
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SAY("ERROR: pss is NULL\n");
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return -EFAULT;
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}
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prt = pss->runtime;
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peasycap = snd_pcm_substream_chip(pss);
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if (!peasycap) {
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SAY("ERROR: peasycap is NULL\n");
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return -EFAULT;
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}
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if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
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SAY("ERROR: bad peasycap\n");
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return -EFAULT;
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}
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JOM(16, "ALSA decides %8i Hz=rate\n", pss->runtime->rate);
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JOM(16, "ALSA decides %8ld =period_size\n", pss->runtime->period_size);
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JOM(16, "ALSA decides %8i =periods\n", pss->runtime->periods);
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JOM(16, "ALSA decides %8ld =buffer_size\n", pss->runtime->buffer_size);
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JOM(16, "ALSA decides %8zd =dma_bytes\n", pss->runtime->dma_bytes);
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JOM(16, "ALSA decides %8ld =boundary\n", pss->runtime->boundary);
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JOM(16, "ALSA decides %8i =period_step\n", pss->runtime->period_step);
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JOM(16, "ALSA decides %8i =sample_bits\n", pss->runtime->sample_bits);
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JOM(16, "ALSA decides %8i =frame_bits\n", pss->runtime->frame_bits);
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JOM(16, "ALSA decides %8ld =min_align\n", pss->runtime->min_align);
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JOM(12, "ALSA decides %8ld =hw_ptr_base\n", pss->runtime->hw_ptr_base);
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JOM(12, "ALSA decides %8ld =hw_ptr_interrupt\n",
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pss->runtime->hw_ptr_interrupt);
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if (prt->dma_bytes != 4 * ((int)prt->period_size) * ((int)prt->periods)) {
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SAY("MISTAKE: unexpected ALSA parameters\n");
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return -ENOENT;
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}
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return 0;
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}
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/*****************************************************************************/
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static int easycap_alsa_ack(struct snd_pcm_substream *pss)
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{
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return 0;
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}
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/*****************************************************************************/
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static int easycap_alsa_trigger(struct snd_pcm_substream *pss, int cmd)
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{
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struct easycap *peasycap;
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int retval;
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JOT(4, "%i=cmd cf %i=START %i=STOP\n", cmd, SNDRV_PCM_TRIGGER_START,
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SNDRV_PCM_TRIGGER_STOP);
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if (!pss) {
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SAY("ERROR: pss is NULL\n");
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return -EFAULT;
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}
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peasycap = snd_pcm_substream_chip(pss);
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if (!peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
SAY("ERROR: bad peasycap\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START: {
|
|
peasycap->audio_idle = 0;
|
|
break;
|
|
}
|
|
case SNDRV_PCM_TRIGGER_STOP: {
|
|
peasycap->audio_idle = 1;
|
|
break;
|
|
}
|
|
default:
|
|
retval = -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|
|
static snd_pcm_uframes_t easycap_alsa_pointer(struct snd_pcm_substream *pss)
|
|
{
|
|
struct easycap *peasycap;
|
|
snd_pcm_uframes_t offset;
|
|
|
|
JOT(16, "\n");
|
|
if (!pss) {
|
|
SAY("ERROR: pss is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
peasycap = snd_pcm_substream_chip(pss);
|
|
if (!peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
SAY("ERROR: bad peasycap\n");
|
|
return -EFAULT;
|
|
}
|
|
if ((0 != peasycap->audio_eof) || (0 != peasycap->audio_idle)) {
|
|
JOM(8, "returning -EIO because "
|
|
"%i=audio_idle %i=audio_eof\n",
|
|
peasycap->audio_idle, peasycap->audio_eof);
|
|
return -EIO;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
if (0 > peasycap->dma_read) {
|
|
JOM(8, "returning -EBUSY\n");
|
|
return -EBUSY;
|
|
}
|
|
offset = ((snd_pcm_uframes_t)peasycap->dma_read)/4;
|
|
JOM(8, "ALSA decides %8i =hw_ptr_base\n", (int)pss->runtime->hw_ptr_base);
|
|
JOM(8, "ALSA decides %8i =hw_ptr_interrupt\n",
|
|
(int)pss->runtime->hw_ptr_interrupt);
|
|
JOM(8, "%7i=offset %7i=dma_read %7i=dma_next\n",
|
|
(int)offset, peasycap->dma_read, peasycap->dma_next);
|
|
return offset;
|
|
}
|
|
/*****************************************************************************/
|
|
static struct page *
|
|
easycap_alsa_page(struct snd_pcm_substream *pss, unsigned long offset)
|
|
{
|
|
return vmalloc_to_page(pss->runtime->dma_area + offset);
|
|
}
|
|
/*****************************************************************************/
|
|
|
|
static struct snd_pcm_ops easycap_alsa_pcm_ops = {
|
|
.open = easycap_alsa_open,
|
|
.close = easycap_alsa_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = easycap_alsa_hw_params,
|
|
.hw_free = easycap_alsa_hw_free,
|
|
.prepare = easycap_alsa_prepare,
|
|
.ack = easycap_alsa_ack,
|
|
.trigger = easycap_alsa_trigger,
|
|
.pointer = easycap_alsa_pointer,
|
|
.page = easycap_alsa_page,
|
|
};
|
|
|
|
/*****************************************************************************/
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* THE FUNCTION snd_card_create() HAS THIS_MODULE AS AN ARGUMENT. THIS
|
|
* MEANS MODULE easycap. BEWARE.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
int easycap_alsa_probe(struct easycap *peasycap)
|
|
{
|
|
int rc;
|
|
struct snd_card *psnd_card;
|
|
struct snd_pcm *psnd_pcm;
|
|
|
|
if (!peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
return -ENODEV;
|
|
}
|
|
if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
|
|
SAY("ERROR: bad peasycap\n");
|
|
return -EFAULT;
|
|
}
|
|
if (0 > peasycap->minor) {
|
|
SAY("ERROR: no minor\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
peasycap->alsa_hardware = alsa_hardware;
|
|
if (peasycap->microphone) {
|
|
peasycap->alsa_hardware.rates = SNDRV_PCM_RATE_32000;
|
|
peasycap->alsa_hardware.rate_min = 32000;
|
|
peasycap->alsa_hardware.rate_max = 32000;
|
|
} else {
|
|
peasycap->alsa_hardware.rates = SNDRV_PCM_RATE_48000;
|
|
peasycap->alsa_hardware.rate_min = 48000;
|
|
peasycap->alsa_hardware.rate_max = 48000;
|
|
}
|
|
|
|
if (0 != snd_card_create(SNDRV_DEFAULT_IDX1, "easycap_alsa",
|
|
THIS_MODULE, 0, &psnd_card)) {
|
|
SAY("ERROR: Cannot do ALSA snd_card_create()\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
sprintf(&psnd_card->id[0], "EasyALSA%i", peasycap->minor);
|
|
strcpy(&psnd_card->driver[0], EASYCAP_DRIVER_DESCRIPTION);
|
|
strcpy(&psnd_card->shortname[0], "easycap_alsa");
|
|
sprintf(&psnd_card->longname[0], "%s", &psnd_card->shortname[0]);
|
|
|
|
psnd_card->dev = &peasycap->pusb_device->dev;
|
|
psnd_card->private_data = peasycap;
|
|
peasycap->psnd_card = psnd_card;
|
|
|
|
rc = snd_pcm_new(psnd_card, "easycap_pcm", 0, 0, 1, &psnd_pcm);
|
|
if (rc) {
|
|
SAM("ERROR: Cannot do ALSA snd_pcm_new()\n");
|
|
snd_card_free(psnd_card);
|
|
return -EFAULT;
|
|
}
|
|
|
|
snd_pcm_set_ops(psnd_pcm, SNDRV_PCM_STREAM_CAPTURE,
|
|
&easycap_alsa_pcm_ops);
|
|
psnd_pcm->info_flags = 0;
|
|
strcpy(&psnd_pcm->name[0], &psnd_card->id[0]);
|
|
psnd_pcm->private_data = peasycap;
|
|
peasycap->psnd_pcm = psnd_pcm;
|
|
peasycap->psubstream = NULL;
|
|
|
|
rc = snd_card_register(psnd_card);
|
|
if (rc) {
|
|
SAM("ERROR: Cannot do ALSA snd_card_register()\n");
|
|
snd_card_free(psnd_card);
|
|
return -EFAULT;
|
|
}
|
|
|
|
SAM("registered %s\n", &psnd_card->id[0]);
|
|
return 0;
|
|
}
|
|
#endif /*! CONFIG_EASYCAP_OSS */
|
|
|
|
/*****************************************************************************/
|
|
/*****************************************************************************/
|
|
/*****************************************************************************/
|
|
/*****************************************************************************/
|
|
/*****************************************************************************/
|
|
/*****************************************************************************/
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* COMMON AUDIO INITIALIZATION
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
easycap_sound_setup(struct easycap *peasycap)
|
|
{
|
|
int rc;
|
|
|
|
JOM(4, "starting initialization\n");
|
|
|
|
if (!peasycap) {
|
|
SAY("ERROR: peasycap is NULL.\n");
|
|
return -EFAULT;
|
|
}
|
|
if (!peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device is NULL\n");
|
|
return -ENODEV;
|
|
}
|
|
JOM(16, "0x%08lX=peasycap->pusb_device\n", (long int)peasycap->pusb_device);
|
|
|
|
rc = audio_setup(peasycap);
|
|
JOM(8, "audio_setup() returned %i\n", rc);
|
|
|
|
if (!peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device has become NULL\n");
|
|
return -ENODEV;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
if (!peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device has become NULL\n");
|
|
return -ENODEV;
|
|
}
|
|
rc = usb_set_interface(peasycap->pusb_device, peasycap->audio_interface,
|
|
peasycap->audio_altsetting_on);
|
|
JOM(8, "usb_set_interface(.,%i,%i) returned %i\n", peasycap->audio_interface,
|
|
peasycap->audio_altsetting_on, rc);
|
|
|
|
rc = wakeup_device(peasycap->pusb_device);
|
|
JOM(8, "wakeup_device() returned %i\n", rc);
|
|
|
|
peasycap->audio_eof = 0;
|
|
peasycap->audio_idle = 0;
|
|
|
|
peasycap->timeval1.tv_sec = 0;
|
|
peasycap->timeval1.tv_usec = 0;
|
|
|
|
submit_audio_urbs(peasycap);
|
|
|
|
JOM(4, "finished initialization\n");
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* SUBMIT ALL AUDIO URBS.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
submit_audio_urbs(struct easycap *peasycap)
|
|
{
|
|
struct data_urb *pdata_urb;
|
|
struct urb *purb;
|
|
struct list_head *plist_head;
|
|
int j, isbad, nospc, m, rc;
|
|
int isbuf;
|
|
|
|
if (!peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
if (!peasycap->purb_audio_head) {
|
|
SAM("ERROR: peasycap->urb_audio_head uninitialized\n");
|
|
return -EFAULT;
|
|
}
|
|
if (!peasycap->pusb_device) {
|
|
SAM("ERROR: peasycap->pusb_device is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (peasycap->audio_isoc_streaming) {
|
|
JOM(4, "already streaming audio urbs\n");
|
|
return 0;
|
|
}
|
|
|
|
JOM(4, "initial submission of all audio urbs\n");
|
|
rc = usb_set_interface(peasycap->pusb_device,
|
|
peasycap->audio_interface,
|
|
peasycap->audio_altsetting_on);
|
|
JOM(8, "usb_set_interface(.,%i,%i) returned %i\n",
|
|
peasycap->audio_interface,
|
|
peasycap->audio_altsetting_on, rc);
|
|
|
|
isbad = 0;
|
|
nospc = 0;
|
|
m = 0;
|
|
list_for_each(plist_head, peasycap->purb_audio_head) {
|
|
pdata_urb = list_entry(plist_head, struct data_urb, list_head);
|
|
if (pdata_urb && pdata_urb->purb) {
|
|
purb = pdata_urb->purb;
|
|
isbuf = pdata_urb->isbuf;
|
|
|
|
purb->interval = 1;
|
|
purb->dev = peasycap->pusb_device;
|
|
purb->pipe = usb_rcvisocpipe(peasycap->pusb_device,
|
|
peasycap->audio_endpointnumber);
|
|
purb->transfer_flags = URB_ISO_ASAP;
|
|
purb->transfer_buffer = peasycap->audio_isoc_buffer[isbuf].pgo;
|
|
purb->transfer_buffer_length = peasycap->audio_isoc_buffer_size;
|
|
#ifdef CONFIG_EASYCAP_OSS
|
|
purb->complete = easyoss_complete;
|
|
#else /* CONFIG_EASYCAP_OSS */
|
|
purb->complete = easycap_alsa_complete;
|
|
#endif /* CONFIG_EASYCAP_OSS */
|
|
purb->context = peasycap;
|
|
purb->start_frame = 0;
|
|
purb->number_of_packets = peasycap->audio_isoc_framesperdesc;
|
|
for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) {
|
|
purb->iso_frame_desc[j].offset = j * peasycap->audio_isoc_maxframesize;
|
|
purb->iso_frame_desc[j].length = peasycap->audio_isoc_maxframesize;
|
|
}
|
|
|
|
rc = usb_submit_urb(purb, GFP_KERNEL);
|
|
if (rc) {
|
|
isbad++;
|
|
SAM("ERROR: usb_submit_urb() failed"
|
|
" for urb with rc: -%s: %d\n",
|
|
strerror(rc), rc);
|
|
} else {
|
|
m++;
|
|
}
|
|
} else {
|
|
isbad++;
|
|
}
|
|
}
|
|
if (nospc) {
|
|
SAM("-ENOSPC=usb_submit_urb() for %i urbs\n", nospc);
|
|
SAM("..... possibly inadequate USB bandwidth\n");
|
|
peasycap->audio_eof = 1;
|
|
}
|
|
if (isbad) {
|
|
JOM(4, "attempting cleanup instead of submitting\n");
|
|
list_for_each(plist_head, (peasycap->purb_audio_head)) {
|
|
pdata_urb = list_entry(plist_head, struct data_urb, list_head);
|
|
if (pdata_urb && pdata_urb->purb)
|
|
usb_kill_urb(pdata_urb->purb);
|
|
}
|
|
peasycap->audio_isoc_streaming = 0;
|
|
} else {
|
|
peasycap->audio_isoc_streaming = m;
|
|
JOM(4, "submitted %i audio urbs\n", m);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|
|
/*---------------------------------------------------------------------------*/
|
|
/*
|
|
* KILL ALL AUDIO URBS.
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
int
|
|
kill_audio_urbs(struct easycap *peasycap)
|
|
{
|
|
int m;
|
|
struct list_head *plist_head;
|
|
struct data_urb *pdata_urb;
|
|
|
|
if (!peasycap) {
|
|
SAY("ERROR: peasycap is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (!peasycap->audio_isoc_streaming) {
|
|
JOM(8, "%i=audio_isoc_streaming, no audio urbs killed\n",
|
|
peasycap->audio_isoc_streaming);
|
|
return 0;
|
|
}
|
|
|
|
if (!peasycap->purb_audio_head) {
|
|
SAM("ERROR: peasycap->purb_audio_head is NULL\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
peasycap->audio_isoc_streaming = 0;
|
|
JOM(4, "killing audio urbs\n");
|
|
m = 0;
|
|
list_for_each(plist_head, (peasycap->purb_audio_head)) {
|
|
pdata_urb = list_entry(plist_head, struct data_urb, list_head);
|
|
if (pdata_urb && pdata_urb->purb) {
|
|
usb_kill_urb(pdata_urb->purb);
|
|
m++;
|
|
}
|
|
}
|
|
JOM(4, "%i audio urbs killed\n", m);
|
|
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|