[staging-next 2/5] staging/easycap: add first level indentation to easycap_sound.c
Tomas Winkler
tomas.winkler at intel.com
Mon Feb 28 17:27:07 UTC 2011
Add the first level indentation to easycap_sound.c with astyle -t8.
41 lines over 80 characters were left out for further fix
Cc: Mike Thomas <rmthomas at sciolus.org>
Signed-off-by: Tomas Winkler <tomas.winkler at intel.com>
---
drivers/staging/easycap/easycap_sound.c | 1744 +++++++++++++++----------------
1 files changed, 862 insertions(+), 882 deletions(-)
rewrite drivers/staging/easycap/easycap_sound.c (62%)
diff --git a/drivers/staging/easycap/easycap_sound.c b/drivers/staging/easycap/easycap_sound.c
dissimilarity index 62%
index 0d647c8..86b9ae0 100644
--- a/drivers/staging/easycap/easycap_sound.c
+++ b/drivers/staging/easycap/easycap_sound.c
@@ -1,882 +1,862 @@
-/******************************************************************************
-* *
-* easycap_sound.c *
-* *
-* Audio driver for EasyCAP USB2.0 Video Capture Device DC60 *
-* *
-* *
-******************************************************************************/
-/*
- *
- * Copyright (C) 2010 R.M. Thomas <rmthomas at sciolus.org>
- *
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * The software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
-*/
-/*****************************************************************************/
-
-#include "easycap.h"
-
-#ifndef CONFIG_EASYCAP_OSS
-/*--------------------------------------------------------------------------*/
-/*
- * PARAMETERS USED WHEN REGISTERING THE AUDIO INTERFACE
- */
-/*--------------------------------------------------------------------------*/
-static const struct snd_pcm_hardware alsa_hardware = {
- .info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
- SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_MMAP_VALID,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
- .rate_min = 32000,
- .rate_max = 48000,
- .channels_min = 2,
- .channels_max = 2,
- .buffer_bytes_max = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT *
- AUDIO_FRAGMENT_MANY,
- .period_bytes_min = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT,
- .period_bytes_max = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT * 2,
- .periods_min = AUDIO_FRAGMENT_MANY,
- .periods_max = AUDIO_FRAGMENT_MANY * 2,
-};
-
-
-/*****************************************************************************/
-/*---------------------------------------------------------------------------*/
-/*
- * ON COMPLETION OF AN AUDIO URB ITS DATA IS COPIED TO THE DAM BUFFER
- * PROVIDED peasycap->audio_idle IS ZERO. REGARDLESS OF THIS BEING TRUE,
- * IT IS RESUBMITTED PROVIDED peasycap->audio_isoc_streaming IS NOT ZERO.
- */
-/*---------------------------------------------------------------------------*/
-void
-easycap_alsa_complete(struct urb *purb)
-{
-struct easycap *peasycap;
-struct snd_pcm_substream *pss;
-struct snd_pcm_runtime *prt;
-int dma_bytes, fragment_bytes;
-int isfragment;
-u8 *p1, *p2;
-s16 tmp;
-int i, j, more, much, rc;
-#ifdef UPSAMPLE
-int k;
-s16 oldaudio, newaudio, delta;
-#endif /*UPSAMPLE*/
-
-JOT(16, "\n");
-
-if (NULL == purb) {
- SAY("ERROR: purb is NULL\n");
- return;
-}
-peasycap = purb->context;
-if (NULL == peasycap) {
- SAY("ERROR: peasycap is NULL\n");
- return;
-}
-if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
- SAY("ERROR: bad peasycap\n");
- return;
-}
-much = 0;
-if (peasycap->audio_idle) {
- JOM(16, "%i=audio_idle %i=audio_isoc_streaming\n",
- peasycap->audio_idle, peasycap->audio_isoc_streaming);
- if (peasycap->audio_isoc_streaming)
- goto resubmit;
-}
-/*---------------------------------------------------------------------------*/
-pss = peasycap->psubstream;
-if (NULL == pss)
- goto resubmit;
-prt = pss->runtime;
-if (NULL == prt)
- goto resubmit;
-dma_bytes = (int)prt->dma_bytes;
-if (0 == dma_bytes)
- goto resubmit;
-fragment_bytes = 4 * ((int)prt->period_size);
-if (0 == fragment_bytes)
- goto resubmit;
-/* -------------------------------------------------------------------------*/
-if (purb->status) {
- if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) {
- JOM(16, "urb status -ESHUTDOWN or -ENOENT\n");
- return;
- }
- SAM("ERROR: non-zero urb status: -%s: %d\n",
- strerror(purb->status), purb->status);
- goto resubmit;
-}
-/*---------------------------------------------------------------------------*/
-/*
- * PROCEED HERE WHEN NO ERROR
- */
-/*---------------------------------------------------------------------------*/
-
-#ifdef UPSAMPLE
-oldaudio = peasycap->oldaudio;
-#endif /*UPSAMPLE*/
-
-for (i = 0; i < purb->number_of_packets; i++) {
- if (purb->iso_frame_desc[i].status < 0) {
- SAM("-%s: %d\n",
- strerror(purb->iso_frame_desc[i].status),
- purb->iso_frame_desc[i].status);
- }
- if (!purb->iso_frame_desc[i].status) {
- more = purb->iso_frame_desc[i].actual_length;
- if (!more)
- peasycap->audio_mt++;
- else {
- if (peasycap->audio_mt) {
- JOM(12, "%4i empty audio urb frames\n",
- peasycap->audio_mt);
- peasycap->audio_mt = 0;
- }
-
- p1 = (u8 *)(purb->transfer_buffer +
- purb->iso_frame_desc[i].offset);
-
-/*---------------------------------------------------------------------------*/
-/*
- * COPY more BYTES FROM ISOC BUFFER TO THE DMA BUFFER,
- * CONVERTING 8-BIT MONO TO 16-BIT SIGNED LITTLE-ENDIAN SAMPLES IF NECESSARY
- */
-/*---------------------------------------------------------------------------*/
- while (more) {
- if (0 > more) {
- SAM("MISTAKE: more is negative\n");
- return;
- }
- much = dma_bytes - peasycap->dma_fill;
- if (0 > much) {
- SAM("MISTAKE: much is negative\n");
- return;
- }
- if (0 == much) {
- peasycap->dma_fill = 0;
- peasycap->dma_next = fragment_bytes;
- JOM(8, "wrapped dma buffer\n");
- }
- if (false == peasycap->microphone) {
- if (much > more)
- much = more;
- memcpy(prt->dma_area +
- peasycap->dma_fill,
- p1, much);
- p1 += much;
- more -= much;
- } else {
-#ifdef UPSAMPLE
- if (much % 16)
- JOM(8, "MISTAKE? much"
- " is not divisible by 16\n");
- if (much > (16 *
- more))
- much = 16 *
- more;
- p2 = (u8 *)(prt->dma_area +
- peasycap->dma_fill);
-
- for (j = 0; j < (much/16); j++) {
- newaudio = ((int) *p1) - 128;
- newaudio = 128 *
- newaudio;
-
- delta = (newaudio - oldaudio)
- / 4;
- tmp = oldaudio + delta;
-
- for (k = 0; k < 4; k++) {
- *p2 = (0x00FF & tmp);
- *(p2 + 1) = (0xFF00 &
- tmp) >> 8;
- p2 += 2;
- *p2 = (0x00FF & tmp);
- *(p2 + 1) = (0xFF00 &
- tmp) >> 8;
- p2 += 2;
- tmp += delta;
- }
- p1++;
- more--;
- oldaudio = tmp;
- }
-#else /*!UPSAMPLE*/
- if (much > (2 * more))
- much = 2 * more;
- p2 = (u8 *)(prt->dma_area +
- peasycap->dma_fill);
-
- for (j = 0; j < (much / 2); j++) {
- tmp = ((int) *p1) - 128;
- tmp = 128 * tmp;
- *p2 = (0x00FF & tmp);
- *(p2 + 1) = (0xFF00 & tmp) >>
- 8;
- p1++; p2 += 2;
- more--;
- }
-#endif /*UPSAMPLE*/
- }
- peasycap->dma_fill += much;
- if (peasycap->dma_fill >= peasycap->dma_next) {
- isfragment = peasycap->dma_fill /
- fragment_bytes;
- if (0 > isfragment) {
- SAM("MISTAKE: isfragment is "
- "negative\n");
- return;
- }
- peasycap->dma_read = (isfragment
- - 1) * fragment_bytes;
- peasycap->dma_next = (isfragment
- + 1) * fragment_bytes;
- if (dma_bytes < peasycap->dma_next) {
- peasycap->dma_next =
- fragment_bytes;
- }
- if (0 <= peasycap->dma_read) {
- JOM(8, "snd_pcm_period_elap"
- "sed(), %i="
- "isfragment\n",
- isfragment);
- snd_pcm_period_elapsed(pss);
- }
- }
- }
- }
- } else {
- JOM(12, "discarding audio samples because "
- "%i=purb->iso_frame_desc[i].status\n",
- purb->iso_frame_desc[i].status);
- }
-
-#ifdef UPSAMPLE
-peasycap->oldaudio = oldaudio;
-#endif /*UPSAMPLE*/
-
-}
-/*---------------------------------------------------------------------------*/
-/*
- * RESUBMIT THIS URB
- */
-/*---------------------------------------------------------------------------*/
-resubmit:
-if (peasycap->audio_isoc_streaming) {
- rc = usb_submit_urb(purb, GFP_ATOMIC);
- if (rc) {
- if ((-ENODEV != rc) && (-ENOENT != rc)) {
- SAM("ERROR: while %i=audio_idle, "
- "usb_submit_urb() failed "
- "with rc: -%s :%d\n", peasycap->audio_idle,
- strerror(rc), rc);
- }
- if (0 < peasycap->audio_isoc_streaming)
- (peasycap->audio_isoc_streaming)--;
- }
-}
-return;
-}
-/*****************************************************************************/
-static int easycap_alsa_open(struct snd_pcm_substream *pss)
-{
-struct snd_pcm *psnd_pcm;
-struct snd_card *psnd_card;
-struct easycap *peasycap;
-
-JOT(4, "\n");
-if (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-psnd_pcm = pss->pcm;
-if (NULL == psnd_pcm) {
- SAY("ERROR: psnd_pcm is NULL\n");
- return -EFAULT;
-}
-psnd_card = psnd_pcm->card;
-if (NULL == psnd_card) {
- SAY("ERROR: psnd_card is NULL\n");
- return -EFAULT;
-}
-
-peasycap = psnd_card->private_data;
-if (NULL == 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 (peasycap->psnd_card != psnd_card) {
- SAM("ERROR: bad peasycap->psnd_card\n");
- return -EFAULT;
-}
-if (NULL != peasycap->psubstream) {
- SAM("ERROR: bad peasycap->psubstream\n");
- return -EFAULT;
-}
-pss->private_data = peasycap;
-peasycap->psubstream = pss;
-pss->runtime->hw = peasycap->alsa_hardware;
-pss->runtime->private_data = peasycap;
-pss->private_data = peasycap;
-
-if (0 != easycap_sound_setup(peasycap)) {
- JOM(4, "ending unsuccessfully\n");
- return -EFAULT;
-}
-JOM(4, "ending successfully\n");
-return 0;
-}
-/*****************************************************************************/
-static int easycap_alsa_close(struct snd_pcm_substream *pss)
-{
-struct easycap *peasycap;
-
-JOT(4, "\n");
-if (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-peasycap = snd_pcm_substream_chip(pss);
-if (NULL == peasycap) {
- SAY("ERROR: peasycap is NULL\n");
- return -EFAULT;
-}
-if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
- SAY("ERROR: bad peasycap\n");
- return -EFAULT;
-}
-pss->private_data = NULL;
-peasycap->psubstream = NULL;
-JOT(4, "ending successfully\n");
-return 0;
-}
-/*****************************************************************************/
-static int easycap_alsa_vmalloc(struct snd_pcm_substream *pss, size_t sz)
-{
-struct snd_pcm_runtime *prt;
-JOT(4, "\n");
-
-if (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-prt = pss->runtime;
-if (NULL == prt) {
- SAY("ERROR: substream.runtime is NULL\n");
- return -EFAULT;
-}
-if (prt->dma_area) {
- if (prt->dma_bytes > sz)
- return 0;
- vfree(prt->dma_area);
-}
-prt->dma_area = vmalloc(sz);
-if (NULL == prt->dma_area)
- return -ENOMEM;
-prt->dma_bytes = sz;
-return 0;
-}
-/*****************************************************************************/
-static int easycap_alsa_hw_params(struct snd_pcm_substream *pss,
- struct snd_pcm_hw_params *phw)
-{
-int rc;
-
-JOT(4, "%i\n", (params_buffer_bytes(phw)));
-if (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-rc = easycap_alsa_vmalloc(pss, params_buffer_bytes(phw));
-if (rc)
- return rc;
-return 0;
-}
-/*****************************************************************************/
-static int easycap_alsa_hw_free(struct snd_pcm_substream *pss)
-{
-struct snd_pcm_runtime *prt;
-JOT(4, "\n");
-
-if (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-prt = pss->runtime;
-if (NULL == prt) {
- SAY("ERROR: substream.runtime is NULL\n");
- return -EFAULT;
-}
-if (NULL != prt->dma_area) {
- JOT(8, "prt->dma_area = %p\n", prt->dma_area);
- vfree(prt->dma_area);
- prt->dma_area = NULL;
-} else
- JOT(8, "dma_area already freed\n");
-return 0;
-}
-/*****************************************************************************/
-static int easycap_alsa_prepare(struct snd_pcm_substream *pss)
-{
-struct easycap *peasycap;
-struct snd_pcm_runtime *prt;
-
-JOT(4, "\n");
-if (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-prt = pss->runtime;
-peasycap = snd_pcm_substream_chip(pss);
-if (NULL == peasycap) {
- SAY("ERROR: peasycap is NULL\n");
- return -EFAULT;
-}
-if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
- SAY("ERROR: bad peasycap\n");
- return -EFAULT;
-}
-
-JOM(16, "ALSA decides %8i Hz=rate\n", (int)pss->runtime->rate);
-JOM(16, "ALSA decides %8i =period_size\n", (int)pss->runtime->period_size);
-JOM(16, "ALSA decides %8i =periods\n", (int)pss->runtime->periods);
-JOM(16, "ALSA decides %8i =buffer_size\n", (int)pss->runtime->buffer_size);
-JOM(16, "ALSA decides %8i =dma_bytes\n", (int)pss->runtime->dma_bytes);
-JOM(16, "ALSA decides %8i =boundary\n", (int)pss->runtime->boundary);
-JOM(16, "ALSA decides %8i =period_step\n", (int)pss->runtime->period_step);
-JOM(16, "ALSA decides %8i =sample_bits\n", (int)pss->runtime->sample_bits);
-JOM(16, "ALSA decides %8i =frame_bits\n", (int)pss->runtime->frame_bits);
-JOM(16, "ALSA decides %8i =min_align\n", (int)pss->runtime->min_align);
-JOM(12, "ALSA decides %8i =hw_ptr_base\n", (int)pss->runtime->hw_ptr_base);
-JOM(12, "ALSA decides %8i =hw_ptr_interrupt\n",
- (int)pss->runtime->hw_ptr_interrupt);
-if (prt->dma_bytes != 4 * ((int)prt->period_size) * ((int)prt->periods)) {
- SAY("MISTAKE: unexpected ALSA parameters\n");
- return -ENOENT;
-}
-return 0;
-}
-/*****************************************************************************/
-static int easycap_alsa_ack(struct snd_pcm_substream *pss)
-{
- return 0;
-}
-/*****************************************************************************/
-static int easycap_alsa_trigger(struct snd_pcm_substream *pss, int cmd)
-{
-struct easycap *peasycap;
-int retval;
-
-JOT(4, "%i=cmd cf %i=START %i=STOP\n", cmd, SNDRV_PCM_TRIGGER_START,
- SNDRV_PCM_TRIGGER_STOP);
-if (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-peasycap = snd_pcm_substream_chip(pss);
-if (NULL == 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 (NULL == pss) {
- SAY("ERROR: pss is NULL\n");
- return -EFAULT;
-}
-peasycap = snd_pcm_substream_chip(pss);
-if (NULL == 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 (NULL == 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 (true == 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;
- } else {
- ;
- 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 (NULL == peasycap) {
- SAY("ERROR: peasycap is NULL.\n");
- return -EFAULT;
-}
-if (NULL == 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 (NULL == peasycap->pusb_device) {
- SAM("ERROR: peasycap->pusb_device has become NULL\n");
- return -ENODEV;
-}
-/*---------------------------------------------------------------------------*/
-if (NULL == 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 (NULL == peasycap) {
- SAY("ERROR: peasycap is NULL\n");
- return -EFAULT;
-}
-if (NULL == peasycap->purb_audio_head) {
- SAM("ERROR: peasycap->urb_audio_head uninitialized\n");
- return -EFAULT;
-}
-if (NULL == peasycap->pusb_device) {
- SAM("ERROR: peasycap->pusb_device is NULL\n");
- return -EFAULT;
-}
-if (!peasycap->audio_isoc_streaming) {
- 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 (NULL != pdata_urb) {
- purb = pdata_urb->purb;
- if (NULL != 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++;
- }
- } 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 (NULL != pdata_urb) {
- purb = pdata_urb->purb;
- if (NULL != purb)
- usb_kill_urb(purb);
- }
- }
- peasycap->audio_isoc_streaming = 0;
- } else {
- peasycap->audio_isoc_streaming = m;
- JOM(4, "submitted %i audio urbs\n", m);
- }
-} else
- JOM(4, "already streaming audio urbs\n");
-
-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 (NULL == peasycap) {
- SAY("ERROR: peasycap is NULL\n");
- return -EFAULT;
-}
-if (peasycap->audio_isoc_streaming) {
- if (NULL != peasycap->purb_audio_head) {
- 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 (NULL != pdata_urb) {
- if (NULL != pdata_urb->purb) {
- usb_kill_urb(pdata_urb->purb);
- m++;
- }
- }
- }
- JOM(4, "%i audio urbs killed\n", m);
- } else {
- SAM("ERROR: peasycap->purb_audio_head is NULL\n");
- return -EFAULT;
- }
-} else {
- JOM(8, "%i=audio_isoc_streaming, no audio urbs killed\n",
- peasycap->audio_isoc_streaming);
-}
-return 0;
-}
-/*****************************************************************************/
+/******************************************************************************
+* *
+* easycap_sound.c *
+* *
+* Audio driver for EasyCAP USB2.0 Video Capture Device DC60 *
+* *
+* *
+******************************************************************************/
+/*
+ *
+ * Copyright (C) 2010 R.M. Thomas <rmthomas at sciolus.org>
+ *
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * The software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+*/
+/*****************************************************************************/
+
+#include "easycap.h"
+
+#ifndef CONFIG_EASYCAP_OSS
+/*--------------------------------------------------------------------------*/
+/*
+ * PARAMETERS USED WHEN REGISTERING THE AUDIO INTERFACE
+ */
+/*--------------------------------------------------------------------------*/
+static const struct snd_pcm_hardware alsa_hardware = {
+ .info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP_VALID,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
+ .rate_min = 32000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = PAGE_SIZE *
+ PAGES_PER_AUDIO_FRAGMENT *
+ AUDIO_FRAGMENT_MANY,
+ .period_bytes_min = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT,
+ .period_bytes_max = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT * 2,
+ .periods_min = AUDIO_FRAGMENT_MANY,
+ .periods_max = AUDIO_FRAGMENT_MANY * 2,
+};
+
+
+/*****************************************************************************/
+/*---------------------------------------------------------------------------*/
+/*
+ * ON COMPLETION OF AN AUDIO URB ITS DATA IS COPIED TO THE DAM BUFFER
+ * PROVIDED peasycap->audio_idle IS ZERO. REGARDLESS OF THIS BEING TRUE,
+ * IT IS RESUBMITTED PROVIDED peasycap->audio_isoc_streaming IS NOT ZERO.
+ */
+/*---------------------------------------------------------------------------*/
+void
+easycap_alsa_complete(struct urb *purb)
+{
+ struct easycap *peasycap;
+ struct snd_pcm_substream *pss;
+ struct snd_pcm_runtime *prt;
+ int dma_bytes, fragment_bytes;
+ int isfragment;
+ u8 *p1, *p2;
+ s16 tmp;
+ int i, j, more, much, rc;
+#ifdef UPSAMPLE
+ int k;
+ s16 oldaudio, newaudio, delta;
+#endif /*UPSAMPLE*/
+
+ JOT(16, "\n");
+
+ if (NULL == purb) {
+ SAY("ERROR: purb is NULL\n");
+ return;
+ }
+ peasycap = purb->context;
+ if (NULL == peasycap) {
+ SAY("ERROR: peasycap is NULL\n");
+ return;
+ }
+ if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
+ SAY("ERROR: bad peasycap\n");
+ return;
+ }
+ much = 0;
+ if (peasycap->audio_idle) {
+ JOM(16, "%i=audio_idle %i=audio_isoc_streaming\n",
+ peasycap->audio_idle, peasycap->audio_isoc_streaming);
+ if (peasycap->audio_isoc_streaming)
+ goto resubmit;
+ }
+/*---------------------------------------------------------------------------*/
+ pss = peasycap->psubstream;
+ if (NULL == pss)
+ goto resubmit;
+ prt = pss->runtime;
+ if (NULL == prt)
+ goto resubmit;
+ dma_bytes = (int)prt->dma_bytes;
+ if (0 == dma_bytes)
+ goto resubmit;
+ fragment_bytes = 4 * ((int)prt->period_size);
+ if (0 == fragment_bytes)
+ goto resubmit;
+/* -------------------------------------------------------------------------*/
+ if (purb->status) {
+ if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) {
+ JOM(16, "urb status -ESHUTDOWN or -ENOENT\n");
+ return;
+ }
+ SAM("ERROR: non-zero urb status: -%s: %d\n",
+ strerror(purb->status), purb->status);
+ goto resubmit;
+ }
+/*---------------------------------------------------------------------------*/
+/*
+ * PROCEED HERE WHEN NO ERROR
+ */
+/*---------------------------------------------------------------------------*/
+
+#ifdef UPSAMPLE
+ oldaudio = peasycap->oldaudio;
+#endif /*UPSAMPLE*/
+
+ for (i = 0; i < purb->number_of_packets; i++) {
+ if (purb->iso_frame_desc[i].status < 0) {
+ SAM("-%s: %d\n",
+ strerror(purb->iso_frame_desc[i].status),
+ purb->iso_frame_desc[i].status);
+ }
+ if (!purb->iso_frame_desc[i].status) {
+ more = purb->iso_frame_desc[i].actual_length;
+ if (!more)
+ peasycap->audio_mt++;
+ else {
+ if (peasycap->audio_mt) {
+ JOM(12, "%4i empty audio urb frames\n",
+ peasycap->audio_mt);
+ peasycap->audio_mt = 0;
+ }
+
+ p1 = (u8 *)(purb->transfer_buffer +
+ purb->iso_frame_desc[i].offset);
+
+ /*
+ * COPY more BYTES FROM ISOC BUFFER
+ * TO THE DMA BUFFER, CONVERTING
+ * 8-BIT MONO TO 16-BIT SIGNED
+ * LITTLE-ENDIAN SAMPLES IF NECESSARY
+ */
+ while (more) {
+ if (0 > more) {
+ SAM("MISTAKE: more is negative\n");
+ return;
+ }
+ much = dma_bytes - peasycap->dma_fill;
+ if (0 > much) {
+ SAM("MISTAKE: much is negative\n");
+ return;
+ }
+ if (0 == much) {
+ peasycap->dma_fill = 0;
+ peasycap->dma_next = fragment_bytes;
+ JOM(8, "wrapped dma buffer\n");
+ }
+ if (false == peasycap->microphone) {
+ if (much > more)
+ much = more;
+ memcpy(prt->dma_area +
+ peasycap->dma_fill,
+ p1, much);
+ p1 += much;
+ more -= much;
+ } else {
+#ifdef UPSAMPLE
+ if (much % 16)
+ JOM(8, "MISTAKE? much"
+ " is not divisible by 16\n");
+ if (much > (16 * more))
+ much = 16 *
+ more;
+ p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
+
+ for (j = 0; j < (much/16); j++) {
+ newaudio = ((int) *p1) - 128;
+ newaudio = 128 * newaudio;
+
+ delta = (newaudio - oldaudio) / 4;
+ tmp = oldaudio + delta;
+
+ for (k = 0; k < 4; k++) {
+ *p2 = (0x00FF & tmp);
+ *(p2 + 1) = (0xFF00 & tmp) >> 8;
+ p2 += 2;
+ *p2 = (0x00FF & tmp);
+ *(p2 + 1) = (0xFF00 & tmp) >> 8;
+ p2 += 2;
+ tmp += delta;
+ }
+ p1++;
+ more--;
+ oldaudio = tmp;
+ }
+#else /*!UPSAMPLE*/
+ if (much > (2 * more))
+ much = 2 * more;
+ p2 = (u8 *)(prt->dma_area + peasycap->dma_fill);
+
+ for (j = 0; j < (much / 2); j++) {
+ tmp = ((int) *p1) - 128;
+ tmp = 128 * tmp;
+ *p2 = (0x00FF & tmp);
+ *(p2 + 1) = (0xFF00 & tmp) >> 8;
+ p1++;
+ p2 += 2;
+ more--;
+ }
+#endif /*UPSAMPLE*/
+ }
+ peasycap->dma_fill += much;
+ if (peasycap->dma_fill >= peasycap->dma_next) {
+ isfragment = peasycap->dma_fill / fragment_bytes;
+ if (0 > isfragment) {
+ SAM("MISTAKE: isfragment is "
+ "negative\n");
+ return;
+ }
+ peasycap->dma_read = (isfragment - 1) * fragment_bytes;
+ peasycap->dma_next = (isfragment + 1) * fragment_bytes;
+ if (dma_bytes < peasycap->dma_next)
+ peasycap->dma_next = fragment_bytes;
+
+ if (0 <= peasycap->dma_read) {
+ JOM(8, "snd_pcm_period_elap"
+ "sed(), %i="
+ "isfragment\n",
+ isfragment);
+ snd_pcm_period_elapsed(pss);
+ }
+ }
+ }
+ }
+ } else {
+ JOM(12, "discarding audio samples because "
+ "%i=purb->iso_frame_desc[i].status\n",
+ purb->iso_frame_desc[i].status);
+ }
+
+#ifdef UPSAMPLE
+ peasycap->oldaudio = oldaudio;
+#endif /*UPSAMPLE*/
+
+ }
+/*---------------------------------------------------------------------------*/
+/*
+ * RESUBMIT THIS URB
+ */
+/*---------------------------------------------------------------------------*/
+resubmit:
+ if (peasycap->audio_isoc_streaming) {
+ rc = usb_submit_urb(purb, GFP_ATOMIC);
+ if (rc) {
+ if ((-ENODEV != rc) && (-ENOENT != rc)) {
+ SAM("ERROR: while %i=audio_idle, "
+ "usb_submit_urb() failed "
+ "with rc: -%s :%d\n", peasycap->audio_idle,
+ strerror(rc), rc);
+ }
+ if (0 < peasycap->audio_isoc_streaming)
+ (peasycap->audio_isoc_streaming)--;
+ }
+ }
+ return;
+}
+/*****************************************************************************/
+static int easycap_alsa_open(struct snd_pcm_substream *pss)
+{
+ struct snd_pcm *psnd_pcm;
+ struct snd_card *psnd_card;
+ struct easycap *peasycap;
+
+ JOT(4, "\n");
+ if (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ psnd_pcm = pss->pcm;
+ if (NULL == psnd_pcm) {
+ SAY("ERROR: psnd_pcm is NULL\n");
+ return -EFAULT;
+ }
+ psnd_card = psnd_pcm->card;
+ if (NULL == psnd_card) {
+ SAY("ERROR: psnd_card is NULL\n");
+ return -EFAULT;
+ }
+
+ peasycap = psnd_card->private_data;
+ if (NULL == 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 (peasycap->psnd_card != psnd_card) {
+ SAM("ERROR: bad peasycap->psnd_card\n");
+ return -EFAULT;
+ }
+ if (NULL != peasycap->psubstream) {
+ SAM("ERROR: bad peasycap->psubstream\n");
+ return -EFAULT;
+ }
+ pss->private_data = peasycap;
+ peasycap->psubstream = pss;
+ pss->runtime->hw = peasycap->alsa_hardware;
+ pss->runtime->private_data = peasycap;
+ pss->private_data = peasycap;
+
+ if (0 != easycap_sound_setup(peasycap)) {
+ JOM(4, "ending unsuccessfully\n");
+ return -EFAULT;
+ }
+ JOM(4, "ending successfully\n");
+ return 0;
+}
+/*****************************************************************************/
+static int easycap_alsa_close(struct snd_pcm_substream *pss)
+{
+ struct easycap *peasycap;
+
+ JOT(4, "\n");
+ if (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ peasycap = snd_pcm_substream_chip(pss);
+ if (NULL == peasycap) {
+ SAY("ERROR: peasycap is NULL\n");
+ return -EFAULT;
+ }
+ if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
+ SAY("ERROR: bad peasycap\n");
+ return -EFAULT;
+ }
+ pss->private_data = NULL;
+ peasycap->psubstream = NULL;
+ JOT(4, "ending successfully\n");
+ return 0;
+}
+/*****************************************************************************/
+static int easycap_alsa_vmalloc(struct snd_pcm_substream *pss, size_t sz)
+{
+ struct snd_pcm_runtime *prt;
+ JOT(4, "\n");
+
+ if (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ prt = pss->runtime;
+ if (NULL == prt) {
+ SAY("ERROR: substream.runtime is NULL\n");
+ return -EFAULT;
+ }
+ if (prt->dma_area) {
+ if (prt->dma_bytes > sz)
+ return 0;
+ vfree(prt->dma_area);
+ }
+ prt->dma_area = vmalloc(sz);
+ if (NULL == prt->dma_area)
+ return -ENOMEM;
+ prt->dma_bytes = sz;
+ return 0;
+}
+/*****************************************************************************/
+static int easycap_alsa_hw_params(struct snd_pcm_substream *pss,
+ struct snd_pcm_hw_params *phw)
+{
+ int rc;
+
+ JOT(4, "%i\n", (params_buffer_bytes(phw)));
+ if (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ rc = easycap_alsa_vmalloc(pss, params_buffer_bytes(phw));
+ if (rc)
+ return rc;
+ return 0;
+}
+/*****************************************************************************/
+static int easycap_alsa_hw_free(struct snd_pcm_substream *pss)
+{
+ struct snd_pcm_runtime *prt;
+ JOT(4, "\n");
+
+ if (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ prt = pss->runtime;
+ if (NULL == prt) {
+ SAY("ERROR: substream.runtime is NULL\n");
+ return -EFAULT;
+ }
+ if (NULL != prt->dma_area) {
+ JOT(8, "prt->dma_area = %p\n", prt->dma_area);
+ vfree(prt->dma_area);
+ prt->dma_area = NULL;
+ } else
+ JOT(8, "dma_area already freed\n");
+ return 0;
+}
+/*****************************************************************************/
+static int easycap_alsa_prepare(struct snd_pcm_substream *pss)
+{
+ struct easycap *peasycap;
+ struct snd_pcm_runtime *prt;
+
+ JOT(4, "\n");
+ if (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ prt = pss->runtime;
+ peasycap = snd_pcm_substream_chip(pss);
+ if (NULL == peasycap) {
+ SAY("ERROR: peasycap is NULL\n");
+ return -EFAULT;
+ }
+ if (memcmp(&peasycap->telltale[0], TELLTALE, strlen(TELLTALE))) {
+ SAY("ERROR: bad peasycap\n");
+ return -EFAULT;
+ }
+
+ JOM(16, "ALSA decides %8i Hz=rate\n", pss->runtime->rate);
+ JOM(16, "ALSA decides %8ld =period_size\n", pss->runtime->period_size);
+ JOM(16, "ALSA decides %8i =periods\n", pss->runtime->periods);
+ JOM(16, "ALSA decides %8ld =buffer_size\n", pss->runtime->buffer_size);
+ JOM(16, "ALSA decides %8zd =dma_bytes\n", pss->runtime->dma_bytes);
+ JOM(16, "ALSA decides %8ld =boundary\n", pss->runtime->boundary);
+ JOM(16, "ALSA decides %8i =period_step\n", pss->runtime->period_step);
+ JOM(16, "ALSA decides %8i =sample_bits\n", pss->runtime->sample_bits);
+ JOM(16, "ALSA decides %8i =frame_bits\n", pss->runtime->frame_bits);
+ JOM(16, "ALSA decides %8ld =min_align\n", pss->runtime->min_align);
+ JOM(12, "ALSA decides %8ld =hw_ptr_base\n", pss->runtime->hw_ptr_base);
+ JOM(12, "ALSA decides %8ld =hw_ptr_interrupt\n",
+ pss->runtime->hw_ptr_interrupt);
+
+ if (prt->dma_bytes != 4 * ((int)prt->period_size) * ((int)prt->periods)) {
+ SAY("MISTAKE: unexpected ALSA parameters\n");
+ return -ENOENT;
+ }
+ return 0;
+}
+/*****************************************************************************/
+static int easycap_alsa_ack(struct snd_pcm_substream *pss)
+{
+ return 0;
+}
+/*****************************************************************************/
+static int easycap_alsa_trigger(struct snd_pcm_substream *pss, int cmd)
+{
+ struct easycap *peasycap;
+ int retval;
+
+ JOT(4, "%i=cmd cf %i=START %i=STOP\n", cmd, SNDRV_PCM_TRIGGER_START,
+ SNDRV_PCM_TRIGGER_STOP);
+ if (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ peasycap = snd_pcm_substream_chip(pss);
+ if (NULL == 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 (NULL == pss) {
+ SAY("ERROR: pss is NULL\n");
+ return -EFAULT;
+ }
+ peasycap = snd_pcm_substream_chip(pss);
+ if (NULL == 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 (NULL == 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 (true == 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;
+ } else {
+ ;
+ 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 (NULL == peasycap) {
+ SAY("ERROR: peasycap is NULL.\n");
+ return -EFAULT;
+ }
+ if (NULL == 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 (NULL == peasycap->pusb_device) {
+ SAM("ERROR: peasycap->pusb_device has become NULL\n");
+ return -ENODEV;
+ }
+/*---------------------------------------------------------------------------*/
+ if (NULL == 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 (NULL == peasycap) {
+ SAY("ERROR: peasycap is NULL\n");
+ return -EFAULT;
+ }
+ if (NULL == peasycap->purb_audio_head) {
+ SAM("ERROR: peasycap->urb_audio_head uninitialized\n");
+ return -EFAULT;
+ }
+ if (NULL == peasycap->pusb_device) {
+ SAM("ERROR: peasycap->pusb_device is NULL\n");
+ return -EFAULT;
+ }
+ if (!peasycap->audio_isoc_streaming) {
+ 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 (NULL != pdata_urb) {
+ purb = pdata_urb->purb;
+ if (NULL != 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++;
+ }
+ } 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 (NULL != pdata_urb) {
+ purb = pdata_urb->purb;
+ if (NULL != purb)
+ usb_kill_urb(purb);
+ }
+ }
+ peasycap->audio_isoc_streaming = 0;
+ } else {
+ peasycap->audio_isoc_streaming = m;
+ JOM(4, "submitted %i audio urbs\n", m);
+ }
+ } else
+ JOM(4, "already streaming audio urbs\n");
+
+ 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 (NULL == peasycap) {
+ SAY("ERROR: peasycap is NULL\n");
+ return -EFAULT;
+ }
+ if (peasycap->audio_isoc_streaming) {
+ if (NULL != peasycap->purb_audio_head) {
+ 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 (NULL != pdata_urb) {
+ if (NULL != pdata_urb->purb) {
+ usb_kill_urb(pdata_urb->purb);
+ m++;
+ }
+ }
+ }
+ JOM(4, "%i audio urbs killed\n", m);
+ } else {
+ SAM("ERROR: peasycap->purb_audio_head is NULL\n");
+ return -EFAULT;
+ }
+ } else {
+ JOM(8, "%i=audio_isoc_streaming, no audio urbs killed\n",
+ peasycap->audio_isoc_streaming);
+ }
+ return 0;
+}
+/*****************************************************************************/
--
1.7.4
---------------------------------------------------------------------
Intel Israel (74) Limited
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