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* Copyright (c) 2002-2004 by Karsten Wiese
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* (Tentative) USB Audio Driver for ALSA
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* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
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* Many codes borrowed from audio.c by
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* Alan Cox (alan@lxorguk.ukuu.org.uk)
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* Thomas Sailer (sailer@ife.ee.ethz.ch)
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/moduleparam.h>
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#include <sound/core.h>
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#include <sound/info.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb.
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1 to 4 have been tested ok on uhci.
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To use 3 on ohci, you'd need a patch:
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look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
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"https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
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1, 2 and 4 work out of the box on ohci, if I recall correctly.
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Bigger is safer operation,
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smaller gives lower latencies.
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#define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter
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nrpacks set to 1, you might as well comment
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this #define out, and thereby produce smaller, faster code.
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You'd also set USX2Y_NRPACKS to 1 then.
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#ifdef USX2Y_NRPACKS_VARIABLE
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static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
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#define nr_of_packs() nrpacks
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module_param(nrpacks, int, 0444);
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MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
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#define nr_of_packs() USX2Y_NRPACKS
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static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
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struct urb *urb = subs->completed_urb;
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struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
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int i, len, lens = 0, hwptr_done = subs->hwptr_done;
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struct usX2Ydev *usX2Y = subs->usX2Y;
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for (i = 0; i < nr_of_packs(); i++) {
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cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
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if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
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snd_printk(KERN_ERR "active frame status %i. "
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"Most propably some hardware problem.\n",
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urb->iso_frame_desc[i].status);
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return urb->iso_frame_desc[i].status;
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len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
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snd_printd("0 == len ERROR!\n");
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/* copy a data chunk */
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if ((hwptr_done + len) > runtime->buffer_size) {
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int cnt = runtime->buffer_size - hwptr_done;
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int blen = cnt * usX2Y->stride;
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memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
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memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
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memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
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len * usX2Y->stride);
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if ((hwptr_done += len) >= runtime->buffer_size)
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hwptr_done -= runtime->buffer_size;
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subs->hwptr_done = hwptr_done;
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subs->transfer_done += lens;
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/* update the pointer, call callback if necessary */
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if (subs->transfer_done >= runtime->period_size) {
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subs->transfer_done -= runtime->period_size;
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snd_pcm_period_elapsed(subs->pcm_substream);
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* prepare urb for playback data pipe
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* we copy the data directly from the pcm buffer.
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* the current position to be copied is held in hwptr field.
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* since a urb can handle only a single linear buffer, if the total
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* transferred area overflows the buffer boundary, we cannot send
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* it directly from the buffer. thus the data is once copied to
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* a temporary buffer and urb points to that.
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static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
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int count, counts, pack;
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struct usX2Ydev *usX2Y = subs->usX2Y;
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struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
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for (pack = 0; pack < nr_of_packs(); pack++) {
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/* calculate the size of a packet */
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counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
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if (counts < 43 || counts > 50) {
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snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
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/* set up descriptor */
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urb->iso_frame_desc[pack].offset = pack ?
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urb->iso_frame_desc[pack - 1].offset +
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urb->iso_frame_desc[pack - 1].length :
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urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
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if (atomic_read(&subs->state) >= state_PRERUNNING)
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if (subs->hwptr + count > runtime->buffer_size) {
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/* err, the transferred area goes over buffer boundary.
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* copy the data to the temp buffer.
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len = runtime->buffer_size - subs->hwptr;
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urb->transfer_buffer = subs->tmpbuf;
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memcpy(subs->tmpbuf, runtime->dma_area +
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subs->hwptr * usX2Y->stride, len * usX2Y->stride);
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memcpy(subs->tmpbuf + len * usX2Y->stride,
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runtime->dma_area, (count - len) * usX2Y->stride);
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subs->hwptr += count;
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subs->hwptr -= runtime->buffer_size;
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/* set the buffer pointer */
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urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
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if ((subs->hwptr += count) >= runtime->buffer_size)
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subs->hwptr -= runtime->buffer_size;
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urb->transfer_buffer = subs->tmpbuf;
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urb->transfer_buffer_length = count * usX2Y->stride;
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* process after playback data complete
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* update the current position and call callback if a period is processed.
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static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
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struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
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int len = urb->actual_length / subs->usX2Y->stride;
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subs->transfer_done += len;
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subs->hwptr_done += len;
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if (subs->hwptr_done >= runtime->buffer_size)
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subs->hwptr_done -= runtime->buffer_size;
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if (subs->transfer_done >= runtime->period_size) {
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subs->transfer_done -= runtime->period_size;
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snd_pcm_period_elapsed(subs->pcm_substream);
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static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
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urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
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urb->dev = subs->usX2Y->dev; /* we need to set this at each time */
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if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
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snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
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static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
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struct snd_usX2Y_substream *playbacksubs,
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struct urb *urb = playbacksubs->completed_urb;
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state = atomic_read(&playbacksubs->state);
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if (state == state_RUNNING)
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usX2Y_urb_play_retire(playbacksubs, urb);
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else if (state >= state_PRERUNNING)
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atomic_inc(&playbacksubs->state);
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case state_STARTING1:
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urb = playbacksubs->urb[0];
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atomic_inc(&playbacksubs->state);
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case state_STARTING2:
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urb = playbacksubs->urb[1];
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atomic_inc(&playbacksubs->state);
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if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
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(err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
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playbacksubs->completed_urb = NULL;
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state = atomic_read(&capsubs->state);
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if (state >= state_PREPARED) {
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if (state == state_RUNNING) {
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if ((err = usX2Y_urb_capt_retire(capsubs)))
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} else if (state >= state_PRERUNNING)
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atomic_inc(&capsubs->state);
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if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
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capsubs->completed_urb = NULL;
261
static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
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for (s = 0; s < 4; s++) {
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struct snd_usX2Y_substream *subs = usX2Y->subs[s];
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snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
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atomic_set(&subs->state, state_STOPPED);
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for (s = 0; s < 4; s++) {
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struct snd_usX2Y_substream *subs = usX2Y->subs[s];
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if (atomic_read(&subs->state) >= state_PRERUNNING) {
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snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
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for (u = 0; u < NRURBS; u++) {
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struct urb *urb = subs->urb[u];
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snd_printdd("%i status=%i start_frame=%i\n",
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u, urb->status, urb->start_frame);
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usX2Y->prepare_subs = NULL;
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wake_up(&usX2Y->prepare_wait_queue);
290
static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
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struct snd_usX2Y_substream *subs, struct urb *urb)
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snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
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usX2Y_clients_stop(usX2Y);
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static void usX2Y_error_sequence(struct usX2Ydev *usX2Y,
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struct snd_usX2Y_substream *subs, struct urb *urb)
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"Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
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"Most propably some urb of usb-frame %i is still missing.\n"
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"Cause could be too long delays in usb-hcd interrupt handling.\n",
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usb_get_current_frame_number(usX2Y->dev),
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subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
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usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame);
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usX2Y_clients_stop(usX2Y);
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static void i_usX2Y_urb_complete(struct urb *urb)
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struct snd_usX2Y_substream *subs = urb->context;
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struct usX2Ydev *usX2Y = subs->usX2Y;
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if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
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snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
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usb_get_current_frame_number(usX2Y->dev),
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subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
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urb->status, urb->start_frame);
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if (unlikely(urb->status)) {
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usX2Y_error_urb_status(usX2Y, subs, urb);
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if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF)))
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subs->completed_urb = urb;
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usX2Y_error_sequence(usX2Y, subs, urb);
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struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
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*playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
336
if (capsubs->completed_urb &&
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atomic_read(&capsubs->state) >= state_PREPARED &&
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(playbacksubs->completed_urb ||
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atomic_read(&playbacksubs->state) < state_PREPARED)) {
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if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
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usX2Y->wait_iso_frame += nr_of_packs();
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usX2Y_clients_stop(usX2Y);
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static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
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void (*complete)(struct urb *))
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for (s = 0; s < 4; s++) {
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struct snd_usX2Y_substream *subs = usX2Y->subs[s];
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for (u = 0; u < NRURBS; u++) {
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struct urb * urb = subs->urb[u];
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urb->complete = complete;
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static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
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usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
368
usX2Y->prepare_subs = NULL;
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static void i_usX2Y_subs_startup(struct urb *urb)
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struct snd_usX2Y_substream *subs = urb->context;
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struct usX2Ydev *usX2Y = subs->usX2Y;
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struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
376
if (NULL != prepare_subs)
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if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
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usX2Y_subs_startup_finish(usX2Y);
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atomic_inc(&prepare_subs->state);
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wake_up(&usX2Y->prepare_wait_queue);
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i_usX2Y_urb_complete(urb);
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static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
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snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
389
subs, subs->endpoint, subs->urb[0], subs->urb[1]);
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/* reset the pointer */
392
subs->hwptr_done = 0;
393
subs->transfer_done = 0;
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static void usX2Y_urb_release(struct urb **urb, int free_tb)
402
kfree((*urb)->transfer_buffer);
408
* release a substreams urbs
410
static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
413
snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
414
for (i = 0; i < NRURBS; i++)
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usX2Y_urb_release(subs->urb + i,
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subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
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* initialize a substream's urbs
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static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
428
int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
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struct usb_device *dev = subs->usX2Y->dev;
431
pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
432
usb_rcvisocpipe(dev, subs->endpoint);
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subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
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if (!subs->maxpacksize)
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if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
438
subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
439
if (NULL == subs->tmpbuf) {
440
snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
444
/* allocate and initialize data urbs */
445
for (i = 0; i < NRURBS; i++) {
446
struct urb **purb = subs->urb + i;
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*purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
453
usX2Y_urbs_release(subs);
456
if (!is_playback && !(*purb)->transfer_buffer) {
457
/* allocate a capture buffer per urb */
458
(*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
459
if (NULL == (*purb)->transfer_buffer) {
460
usX2Y_urbs_release(subs);
465
(*purb)->pipe = pipe;
466
(*purb)->number_of_packets = nr_of_packs();
467
(*purb)->context = subs;
468
(*purb)->interval = 1;
469
(*purb)->complete = i_usX2Y_subs_startup;
474
static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
476
struct usX2Ydev *usX2Y = subs->usX2Y;
477
usX2Y->prepare_subs = subs;
478
subs->urb[0]->start_frame = -1;
480
usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
483
static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
486
struct usX2Ydev *usX2Y = subs->usX2Y;
488
if ((err = usX2Y_urbs_allocate(subs)) < 0)
490
subs->completed_urb = NULL;
491
for (i = 0; i < 4; i++) {
492
struct snd_usX2Y_substream *subs = usX2Y->subs[i];
493
if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
498
usX2Y_subs_startup(subs);
499
for (i = 0; i < NRURBS; i++) {
500
struct urb *urb = subs->urb[i];
501
if (usb_pipein(urb->pipe)) {
504
atomic_set(&subs->state, state_STARTING3);
505
urb->dev = usX2Y->dev;
506
urb->transfer_flags = URB_ISO_ASAP;
507
for (pack = 0; pack < nr_of_packs(); pack++) {
508
urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
509
urb->iso_frame_desc[pack].length = subs->maxpacksize;
511
urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
512
if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
513
snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
518
usX2Y->wait_iso_frame = urb->start_frame;
519
urb->transfer_flags = 0;
521
atomic_set(&subs->state, state_STARTING1);
526
wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
527
if (atomic_read(&subs->state) != state_PREPARED)
532
usX2Y_subs_startup_finish(usX2Y);
533
usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
539
* return the current pcm pointer. just return the hwptr_done value.
541
static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
543
struct snd_usX2Y_substream *subs = substream->runtime->private_data;
544
return subs->hwptr_done;
547
* start/stop substream
549
static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
551
struct snd_usX2Y_substream *subs = substream->runtime->private_data;
554
case SNDRV_PCM_TRIGGER_START:
555
snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
556
if (atomic_read(&subs->state) == state_PREPARED &&
557
atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
558
atomic_set(&subs->state, state_PRERUNNING);
564
case SNDRV_PCM_TRIGGER_STOP:
565
snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
566
if (atomic_read(&subs->state) >= state_PRERUNNING)
567
atomic_set(&subs->state, state_PREPARED);
577
* allocate a buffer, setup samplerate
579
* so far we use a physically linear buffer although packetize transfer
580
* doesn't need a continuous area.
581
* if sg buffer is supported on the later version of alsa, we'll follow
590
{ 0x14, 0x08}, // this line sets 44100, well actually a little less
591
{ 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
624
static struct s_c2 SetRate48000[] =
626
{ 0x14, 0x09}, // this line sets 48000, well actually a little less
627
{ 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
660
#define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
662
static void i_usX2Y_04Int(struct urb *urb)
664
struct usX2Ydev *usX2Y = urb->context;
667
snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
668
if (0 == --usX2Y->US04->len)
669
wake_up(&usX2Y->In04WaitQueue);
672
static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
675
struct snd_usX2Y_urbSeq *us = NULL;
677
struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
679
if (usX2Y->rate != rate) {
680
us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
685
usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL);
686
if (NULL == usbdata) {
690
for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
691
if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
695
((char*)(usbdata + i))[0] = ra[i].c1;
696
((char*)(usbdata + i))[1] = ra[i].c2;
697
usb_fill_bulk_urb(us->urb[i], usX2Y->dev, usb_sndbulkpipe(usX2Y->dev, 4),
698
usbdata + i, 2, i_usX2Y_04Int, usX2Y);
700
us->urb[i]->transfer_flags = USB_QUEUE_BULK;
704
us->len = NOOF_SETRATE_URBS;
706
wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
712
us->submitted = 2*NOOF_SETRATE_URBS;
713
for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
714
struct urb *urb = us->urb[i];
734
static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
738
if (format == SNDRV_PCM_FORMAT_S24_3LE) {
745
list_for_each(p, &usX2Y->midi_list) {
746
snd_usbmidi_input_stop(p);
748
usb_kill_urb(usX2Y->In04urb);
749
if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) {
750
snd_printk(KERN_ERR "usb_set_interface error \n");
753
usX2Y->In04urb->dev = usX2Y->dev;
754
err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
755
list_for_each(p, &usX2Y->midi_list) {
756
snd_usbmidi_input_start(p);
758
usX2Y->format = format;
764
static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
765
struct snd_pcm_hw_params *hw_params)
768
unsigned int rate = params_rate(hw_params);
769
snd_pcm_format_t format = params_format(hw_params);
770
struct snd_card *card = substream->pstr->pcm->card;
771
struct list_head *list;
773
snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
774
// all pcm substreams off one usX2Y have to operate at the same rate & format
775
list_for_each(list, &card->devices) {
776
struct snd_device *dev;
779
dev = snd_device(list);
780
if (dev->type != SNDRV_DEV_PCM)
782
pcm = dev->device_data;
783
for (s = 0; s < 2; ++s) {
784
struct snd_pcm_substream *test_substream;
785
test_substream = pcm->streams[s].substream;
786
if (test_substream && test_substream != substream &&
787
test_substream->runtime &&
788
((test_substream->runtime->format &&
789
test_substream->runtime->format != format) ||
790
(test_substream->runtime->rate &&
791
test_substream->runtime->rate != rate)))
795
if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
796
snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
797
substream, params_buffer_bytes(hw_params), err);
806
static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
808
struct snd_pcm_runtime *runtime = substream->runtime;
809
struct snd_usX2Y_substream *subs = runtime->private_data;
810
mutex_lock(&subs->usX2Y->prepare_mutex);
811
snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
813
if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
814
struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
815
atomic_set(&subs->state, state_STOPPED);
816
usX2Y_urbs_release(subs);
817
if (!cap_subs->pcm_substream ||
818
!cap_subs->pcm_substream->runtime ||
819
!cap_subs->pcm_substream->runtime->status ||
820
cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
821
atomic_set(&cap_subs->state, state_STOPPED);
822
usX2Y_urbs_release(cap_subs);
825
struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
826
if (atomic_read(&playback_subs->state) < state_PREPARED) {
827
atomic_set(&subs->state, state_STOPPED);
828
usX2Y_urbs_release(subs);
831
mutex_unlock(&subs->usX2Y->prepare_mutex);
832
return snd_pcm_lib_free_pages(substream);
837
* set format and initialize urbs
839
static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
841
struct snd_pcm_runtime *runtime = substream->runtime;
842
struct snd_usX2Y_substream *subs = runtime->private_data;
843
struct usX2Ydev *usX2Y = subs->usX2Y;
844
struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
846
snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
848
mutex_lock(&usX2Y->prepare_mutex);
849
usX2Y_subs_prepare(subs);
850
// Start hardware streams
851
// SyncStream first....
852
if (atomic_read(&capsubs->state) < state_PREPARED) {
853
if (usX2Y->format != runtime->format)
854
if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
855
goto up_prepare_mutex;
856
if (usX2Y->rate != runtime->rate)
857
if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
858
goto up_prepare_mutex;
859
snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
860
if (0 > (err = usX2Y_urbs_start(capsubs)))
861
goto up_prepare_mutex;
864
if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
865
err = usX2Y_urbs_start(subs);
868
mutex_unlock(&usX2Y->prepare_mutex);
872
static struct snd_pcm_hardware snd_usX2Y_2c =
874
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
875
SNDRV_PCM_INFO_BLOCK_TRANSFER |
876
SNDRV_PCM_INFO_MMAP_VALID |
877
SNDRV_PCM_INFO_BATCH),
878
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
879
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
884
.buffer_bytes_max = (2*128*1024),
885
.period_bytes_min = 64,
886
.period_bytes_max = (128*1024),
894
static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
896
struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **)
897
snd_pcm_substream_chip(substream))[substream->stream];
898
struct snd_pcm_runtime *runtime = substream->runtime;
900
if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
903
runtime->hw = snd_usX2Y_2c;
904
runtime->private_data = subs;
905
subs->pcm_substream = substream;
906
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
912
static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
914
struct snd_pcm_runtime *runtime = substream->runtime;
915
struct snd_usX2Y_substream *subs = runtime->private_data;
917
subs->pcm_substream = NULL;
923
static struct snd_pcm_ops snd_usX2Y_pcm_ops =
925
.open = snd_usX2Y_pcm_open,
926
.close = snd_usX2Y_pcm_close,
927
.ioctl = snd_pcm_lib_ioctl,
928
.hw_params = snd_usX2Y_pcm_hw_params,
929
.hw_free = snd_usX2Y_pcm_hw_free,
930
.prepare = snd_usX2Y_pcm_prepare,
931
.trigger = snd_usX2Y_pcm_trigger,
932
.pointer = snd_usX2Y_pcm_pointer,
937
* free a usb stream instance
939
static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
941
kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
942
usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
944
kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
945
usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
948
static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
950
struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
952
usX2Y_audio_stream_free(usX2Y_stream);
955
static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
959
struct snd_usX2Y_substream **usX2Y_substream =
960
usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs;
962
for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
963
i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
964
usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
965
if (NULL == usX2Y_substream[i]) {
966
snd_printk(KERN_ERR "cannot malloc\n");
969
usX2Y_substream[i]->usX2Y = usX2Y(card);
972
if (playback_endpoint)
973
usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
974
usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
976
err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs,
977
playback_endpoint ? 1 : 0, 1,
980
usX2Y_audio_stream_free(usX2Y_substream);
984
if (playback_endpoint)
985
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
986
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
988
pcm->private_data = usX2Y_substream;
989
pcm->private_free = snd_usX2Y_pcm_private_free;
992
sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs);
994
if ((playback_endpoint &&
995
0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
996
SNDRV_DMA_TYPE_CONTINUOUS,
997
snd_dma_continuous_data(GFP_KERNEL),
998
64*1024, 128*1024))) ||
999
0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
1000
SNDRV_DMA_TYPE_CONTINUOUS,
1001
snd_dma_continuous_data(GFP_KERNEL),
1002
64*1024, 128*1024))) {
1003
snd_usX2Y_pcm_private_free(pcm);
1006
usX2Y(card)->pcm_devs++;
1012
* create a chip instance and set its names.
1014
int usX2Y_audio_create(struct snd_card *card)
1018
INIT_LIST_HEAD(&usX2Y(card)->pcm_list);
1020
if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
1022
if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428)
1023
if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
1025
if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122)
1026
err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.