// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* US-X2Y AUDIO
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* Copyright (c) 2002-2004 by Karsten Wiese
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*
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* based on
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*
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* (Tentative) USB Audio Driver for ALSA
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*
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* Main and PCM part
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*
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* Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
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*
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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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*/
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|
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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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#include "usx2y.h"
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#include "usbusx2y.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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.
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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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*/
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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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*/
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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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#else
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#define nr_of_packs() USX2Y_NRPACKS
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#endif
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static int usx2y_urb_capt_retire(struct snd_usx2y_substream *subs)
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{
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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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unsigned char *cp;
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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 probably 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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}
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len = urb->iso_frame_desc[i].actual_length / usx2y->stride;
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if (! len) {
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snd_printd("0 == len ERROR!\n");
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continue;
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}
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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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} else {
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memcpy(runtime->dma_area + hwptr_done * usx2y->stride, cp,
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len * usx2y->stride);
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}
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lens += len;
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if ((hwptr_done += len) >= runtime->buffer_size)
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hwptr_done -= runtime->buffer_size;
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}
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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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}
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return 0;
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}
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/*
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* prepare urb for playback data pipe
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*
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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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*/
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static int usx2y_urb_play_prepare(struct snd_usx2y_substream *subs,
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struct urb *cap_urb,
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struct urb *urb)
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{
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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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count = 0;
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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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count += counts;
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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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return -EPIPE;
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}
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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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0;
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urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
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}
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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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*/
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int len;
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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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} else {
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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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}
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else
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urb->transfer_buffer = subs->tmpbuf;
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urb->transfer_buffer_length = count * usx2y->stride;
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return 0;
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}
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/*
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* process after playback data complete
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*
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* update the current position and call callback if a period is processed.
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*/
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static void usx2y_urb_play_retire(struct snd_usx2y_substream *subs, struct urb *urb)
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{
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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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}
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}
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static int usx2y_urb_submit(struct snd_usx2y_substream *subs, struct urb *urb, int frame)
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{
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int err;
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if (!urb)
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return -ENODEV;
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urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
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urb->hcpriv = NULL;
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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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return err;
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}
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return 0;
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}
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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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int frame)
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{
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int err, state;
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struct urb *urb = playbacksubs->completed_urb;
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state = atomic_read(&playbacksubs->state);
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if (NULL != urb) {
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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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} else {
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switch (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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break;
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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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break;
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}
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}
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if (urb) {
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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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return err;
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}
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}
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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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return err;
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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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return err;
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}
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capsubs->completed_urb = NULL;
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return 0;
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}
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static void usx2y_clients_stop(struct usx2ydev *usx2y)
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{
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int s, u;
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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 (subs) {
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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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}
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}
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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 (subs) {
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if (atomic_read(&subs->state) >= STATE_PRERUNNING)
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snd_pcm_stop_xrun(subs->pcm_substream);
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for (u = 0; u < NRURBS; u++) {
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struct urb *urb = subs->urb[u];
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if (NULL != urb)
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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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}
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}
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}
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usx2y->prepare_subs = NULL;
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wake_up(&usx2y->prepare_wait_queue);
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}
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|
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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urb->status = 0;
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usx2y_clients_stop(usx2y);
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}
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static void i_usx2y_urb_complete(struct urb *urb)
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{
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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",
|
urb->status, urb->start_frame);
|
return;
|
}
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if (unlikely(urb->status)) {
|
usx2y_error_urb_status(usx2y, subs, urb);
|
return;
|
}
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subs->completed_urb = urb;
|
|
{
|
struct snd_usx2y_substream *capsubs = usx2y->subs[SNDRV_PCM_STREAM_CAPTURE],
|
*playbacksubs = usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK];
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if (capsubs->completed_urb &&
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atomic_read(&capsubs->state) >= STATE_PREPARED &&
|
(playbacksubs->completed_urb ||
|
atomic_read(&playbacksubs->state) < STATE_PREPARED)) {
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if (!usx2y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
|
usx2y->wait_iso_frame += nr_of_packs();
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else {
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snd_printdd("\n");
|
usx2y_clients_stop(usx2y);
|
}
|
}
|
}
|
}
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|
static void usx2y_urbs_set_complete(struct usx2ydev * usx2y,
|
void (*complete)(struct urb *))
|
{
|
int s, u;
|
for (s = 0; s < 4; s++) {
|
struct snd_usx2y_substream *subs = usx2y->subs[s];
|
if (NULL != subs)
|
for (u = 0; u < NRURBS; u++) {
|
struct urb * urb = subs->urb[u];
|
if (NULL != urb)
|
urb->complete = complete;
|
}
|
}
|
}
|
|
static void usx2y_subs_startup_finish(struct usx2ydev * usx2y)
|
{
|
usx2y_urbs_set_complete(usx2y, i_usx2y_urb_complete);
|
usx2y->prepare_subs = NULL;
|
}
|
|
static void i_usx2y_subs_startup(struct urb *urb)
|
{
|
struct snd_usx2y_substream *subs = urb->context;
|
struct usx2ydev *usx2y = subs->usx2y;
|
struct snd_usx2y_substream *prepare_subs = usx2y->prepare_subs;
|
if (NULL != prepare_subs)
|
if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
|
usx2y_subs_startup_finish(usx2y);
|
atomic_inc(&prepare_subs->state);
|
wake_up(&usx2y->prepare_wait_queue);
|
}
|
|
i_usx2y_urb_complete(urb);
|
}
|
|
static void usx2y_subs_prepare(struct snd_usx2y_substream *subs)
|
{
|
snd_printdd("usx2y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
|
subs, subs->endpoint, subs->urb[0], subs->urb[1]);
|
/* reset the pointer */
|
subs->hwptr = 0;
|
subs->hwptr_done = 0;
|
subs->transfer_done = 0;
|
}
|
|
|
static void usx2y_urb_release(struct urb **urb, int free_tb)
|
{
|
if (*urb) {
|
usb_kill_urb(*urb);
|
if (free_tb)
|
kfree((*urb)->transfer_buffer);
|
usb_free_urb(*urb);
|
*urb = NULL;
|
}
|
}
|
/*
|
* release a substreams urbs
|
*/
|
static void usx2y_urbs_release(struct snd_usx2y_substream *subs)
|
{
|
int i;
|
snd_printdd("usx2y_urbs_release() %i\n", subs->endpoint);
|
for (i = 0; i < NRURBS; i++)
|
usx2y_urb_release(subs->urb + i,
|
subs != subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
|
|
kfree(subs->tmpbuf);
|
subs->tmpbuf = NULL;
|
}
|
/*
|
* initialize a substream's urbs
|
*/
|
static int usx2y_urbs_allocate(struct snd_usx2y_substream *subs)
|
{
|
int i;
|
unsigned int pipe;
|
int is_playback = subs == subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK];
|
struct usb_device *dev = subs->usx2y->dev;
|
|
pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
|
usb_rcvisocpipe(dev, subs->endpoint);
|
subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
|
if (!subs->maxpacksize)
|
return -EINVAL;
|
|
if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
|
subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
|
if (!subs->tmpbuf)
|
return -ENOMEM;
|
}
|
/* allocate and initialize data urbs */
|
for (i = 0; i < NRURBS; i++) {
|
struct urb **purb = subs->urb + i;
|
if (*purb) {
|
usb_kill_urb(*purb);
|
continue;
|
}
|
*purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
|
if (NULL == *purb) {
|
usx2y_urbs_release(subs);
|
return -ENOMEM;
|
}
|
if (!is_playback && !(*purb)->transfer_buffer) {
|
/* allocate a capture buffer per urb */
|
(*purb)->transfer_buffer =
|
kmalloc_array(subs->maxpacksize,
|
nr_of_packs(), GFP_KERNEL);
|
if (NULL == (*purb)->transfer_buffer) {
|
usx2y_urbs_release(subs);
|
return -ENOMEM;
|
}
|
}
|
(*purb)->dev = dev;
|
(*purb)->pipe = pipe;
|
(*purb)->number_of_packets = nr_of_packs();
|
(*purb)->context = subs;
|
(*purb)->interval = 1;
|
(*purb)->complete = i_usx2y_subs_startup;
|
}
|
return 0;
|
}
|
|
static void usx2y_subs_startup(struct snd_usx2y_substream *subs)
|
{
|
struct usx2ydev *usx2y = subs->usx2y;
|
usx2y->prepare_subs = subs;
|
subs->urb[0]->start_frame = -1;
|
wmb();
|
usx2y_urbs_set_complete(usx2y, i_usx2y_subs_startup);
|
}
|
|
static int usx2y_urbs_start(struct snd_usx2y_substream *subs)
|
{
|
int i, err;
|
struct usx2ydev *usx2y = subs->usx2y;
|
|
if ((err = usx2y_urbs_allocate(subs)) < 0)
|
return err;
|
subs->completed_urb = NULL;
|
for (i = 0; i < 4; i++) {
|
struct snd_usx2y_substream *subs = usx2y->subs[i];
|
if (subs != NULL && atomic_read(&subs->state) >= STATE_PREPARED)
|
goto start;
|
}
|
|
start:
|
usx2y_subs_startup(subs);
|
for (i = 0; i < NRURBS; i++) {
|
struct urb *urb = subs->urb[i];
|
if (usb_pipein(urb->pipe)) {
|
unsigned long pack;
|
if (0 == i)
|
atomic_set(&subs->state, STATE_STARTING3);
|
urb->dev = usx2y->dev;
|
for (pack = 0; pack < nr_of_packs(); pack++) {
|
urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
|
urb->iso_frame_desc[pack].length = subs->maxpacksize;
|
}
|
urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
|
if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
|
snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
|
err = -EPIPE;
|
goto cleanup;
|
} else
|
if (i == 0)
|
usx2y->wait_iso_frame = urb->start_frame;
|
urb->transfer_flags = 0;
|
} else {
|
atomic_set(&subs->state, STATE_STARTING1);
|
break;
|
}
|
}
|
err = 0;
|
wait_event(usx2y->prepare_wait_queue, NULL == usx2y->prepare_subs);
|
if (atomic_read(&subs->state) != STATE_PREPARED)
|
err = -EPIPE;
|
|
cleanup:
|
if (err) {
|
usx2y_subs_startup_finish(usx2y);
|
usx2y_clients_stop(usx2y); // something is completely wroong > stop evrything
|
}
|
return err;
|
}
|
|
/*
|
* return the current pcm pointer. just return the hwptr_done value.
|
*/
|
static snd_pcm_uframes_t snd_usx2y_pcm_pointer(struct snd_pcm_substream *substream)
|
{
|
struct snd_usx2y_substream *subs = substream->runtime->private_data;
|
return subs->hwptr_done;
|
}
|
/*
|
* start/stop substream
|
*/
|
static int snd_usx2y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
{
|
struct snd_usx2y_substream *subs = substream->runtime->private_data;
|
|
switch (cmd) {
|
case SNDRV_PCM_TRIGGER_START:
|
snd_printdd("snd_usx2y_pcm_trigger(START)\n");
|
if (atomic_read(&subs->state) == STATE_PREPARED &&
|
atomic_read(&subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= STATE_PREPARED) {
|
atomic_set(&subs->state, STATE_PRERUNNING);
|
} else {
|
snd_printdd("\n");
|
return -EPIPE;
|
}
|
break;
|
case SNDRV_PCM_TRIGGER_STOP:
|
snd_printdd("snd_usx2y_pcm_trigger(STOP)\n");
|
if (atomic_read(&subs->state) >= STATE_PRERUNNING)
|
atomic_set(&subs->state, STATE_PREPARED);
|
break;
|
default:
|
return -EINVAL;
|
}
|
return 0;
|
}
|
|
|
/*
|
* allocate a buffer, setup samplerate
|
*
|
* so far we use a physically linear buffer although packetize transfer
|
* doesn't need a continuous area.
|
* if sg buffer is supported on the later version of alsa, we'll follow
|
* that.
|
*/
|
static const struct s_c2
|
{
|
char c1, c2;
|
}
|
setrate_44100[] =
|
{
|
{ 0x14, 0x08}, // this line sets 44100, well actually a little less
|
{ 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
|
{ 0x18, 0x42},
|
{ 0x18, 0x45},
|
{ 0x18, 0x46},
|
{ 0x18, 0x48},
|
{ 0x18, 0x4A},
|
{ 0x18, 0x4C},
|
{ 0x18, 0x4E},
|
{ 0x18, 0x50},
|
{ 0x18, 0x52},
|
{ 0x18, 0x54},
|
{ 0x18, 0x56},
|
{ 0x18, 0x58},
|
{ 0x18, 0x5A},
|
{ 0x18, 0x5C},
|
{ 0x18, 0x5E},
|
{ 0x18, 0x60},
|
{ 0x18, 0x62},
|
{ 0x18, 0x64},
|
{ 0x18, 0x66},
|
{ 0x18, 0x68},
|
{ 0x18, 0x6A},
|
{ 0x18, 0x6C},
|
{ 0x18, 0x6E},
|
{ 0x18, 0x70},
|
{ 0x18, 0x72},
|
{ 0x18, 0x74},
|
{ 0x18, 0x76},
|
{ 0x18, 0x78},
|
{ 0x18, 0x7A},
|
{ 0x18, 0x7C},
|
{ 0x18, 0x7E}
|
};
|
static const struct s_c2 setrate_48000[] =
|
{
|
{ 0x14, 0x09}, // this line sets 48000, well actually a little less
|
{ 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
|
{ 0x18, 0x42},
|
{ 0x18, 0x45},
|
{ 0x18, 0x46},
|
{ 0x18, 0x48},
|
{ 0x18, 0x4A},
|
{ 0x18, 0x4C},
|
{ 0x18, 0x4E},
|
{ 0x18, 0x50},
|
{ 0x18, 0x52},
|
{ 0x18, 0x54},
|
{ 0x18, 0x56},
|
{ 0x18, 0x58},
|
{ 0x18, 0x5A},
|
{ 0x18, 0x5C},
|
{ 0x18, 0x5E},
|
{ 0x18, 0x60},
|
{ 0x18, 0x62},
|
{ 0x18, 0x64},
|
{ 0x18, 0x66},
|
{ 0x18, 0x68},
|
{ 0x18, 0x6A},
|
{ 0x18, 0x6C},
|
{ 0x18, 0x6E},
|
{ 0x18, 0x70},
|
{ 0x18, 0x73},
|
{ 0x18, 0x74},
|
{ 0x18, 0x76},
|
{ 0x18, 0x78},
|
{ 0x18, 0x7A},
|
{ 0x18, 0x7C},
|
{ 0x18, 0x7E}
|
};
|
#define NOOF_SETRATE_URBS ARRAY_SIZE(setrate_48000)
|
|
static void i_usx2y_04int(struct urb *urb)
|
{
|
struct usx2ydev *usx2y = urb->context;
|
|
if (urb->status)
|
snd_printk(KERN_ERR "snd_usx2y_04int() urb->status=%i\n", urb->status);
|
if (0 == --usx2y->us04->len)
|
wake_up(&usx2y->in04_wait_queue);
|
}
|
|
static int usx2y_rate_set(struct usx2ydev *usx2y, int rate)
|
{
|
int err = 0, i;
|
struct snd_usx2y_urb_seq *us = NULL;
|
int *usbdata = NULL;
|
const struct s_c2 *ra = rate == 48000 ? setrate_48000 : setrate_44100;
|
|
if (usx2y->rate != rate) {
|
us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
|
if (NULL == us) {
|
err = -ENOMEM;
|
goto cleanup;
|
}
|
usbdata = kmalloc_array(NOOF_SETRATE_URBS, sizeof(int),
|
GFP_KERNEL);
|
if (NULL == usbdata) {
|
err = -ENOMEM;
|
goto cleanup;
|
}
|
for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
|
if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
|
err = -ENOMEM;
|
goto cleanup;
|
}
|
((char*)(usbdata + i))[0] = ra[i].c1;
|
((char*)(usbdata + i))[1] = ra[i].c2;
|
usb_fill_bulk_urb(us->urb[i], usx2y->dev, usb_sndbulkpipe(usx2y->dev, 4),
|
usbdata + i, 2, i_usx2y_04int, usx2y);
|
}
|
err = usb_urb_ep_type_check(us->urb[0]);
|
if (err < 0)
|
goto cleanup;
|
us->submitted = 0;
|
us->len = NOOF_SETRATE_URBS;
|
usx2y->us04 = us;
|
wait_event_timeout(usx2y->in04_wait_queue, 0 == us->len, HZ);
|
usx2y->us04 = NULL;
|
if (us->len)
|
err = -ENODEV;
|
cleanup:
|
if (us) {
|
us->submitted = 2*NOOF_SETRATE_URBS;
|
for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
|
struct urb *urb = us->urb[i];
|
if (!urb)
|
continue;
|
if (urb->status) {
|
if (!err)
|
err = -ENODEV;
|
usb_kill_urb(urb);
|
}
|
usb_free_urb(urb);
|
}
|
usx2y->us04 = NULL;
|
kfree(usbdata);
|
kfree(us);
|
if (!err)
|
usx2y->rate = rate;
|
}
|
}
|
|
return err;
|
}
|
|
|
static int usx2y_format_set(struct usx2ydev *usx2y, snd_pcm_format_t format)
|
{
|
int alternate, err;
|
struct list_head* p;
|
if (format == SNDRV_PCM_FORMAT_S24_3LE) {
|
alternate = 2;
|
usx2y->stride = 6;
|
} else {
|
alternate = 1;
|
usx2y->stride = 4;
|
}
|
list_for_each(p, &usx2y->midi_list) {
|
snd_usbmidi_input_stop(p);
|
}
|
usb_kill_urb(usx2y->in04_urb);
|
if ((err = usb_set_interface(usx2y->dev, 0, alternate))) {
|
snd_printk(KERN_ERR "usb_set_interface error \n");
|
return err;
|
}
|
usx2y->in04_urb->dev = usx2y->dev;
|
err = usb_submit_urb(usx2y->in04_urb, GFP_KERNEL);
|
list_for_each(p, &usx2y->midi_list) {
|
snd_usbmidi_input_start(p);
|
}
|
usx2y->format = format;
|
usx2y->rate = 0;
|
return err;
|
}
|
|
|
static int snd_usx2y_pcm_hw_params(struct snd_pcm_substream *substream,
|
struct snd_pcm_hw_params *hw_params)
|
{
|
int err = 0;
|
unsigned int rate = params_rate(hw_params);
|
snd_pcm_format_t format = params_format(hw_params);
|
struct snd_card *card = substream->pstr->pcm->card;
|
struct usx2ydev *dev = usx2y(card);
|
int i;
|
|
mutex_lock(&usx2y(card)->pcm_mutex);
|
snd_printdd("snd_usx2y_hw_params(%p, %p)\n", substream, hw_params);
|
/* all pcm substreams off one usx2y have to operate at the same
|
* rate & format
|
*/
|
for (i = 0; i < dev->pcm_devs * 2; i++) {
|
struct snd_usx2y_substream *subs = dev->subs[i];
|
struct snd_pcm_substream *test_substream;
|
|
if (!subs)
|
continue;
|
test_substream = subs->pcm_substream;
|
if (!test_substream || test_substream == substream ||
|
!test_substream->runtime)
|
continue;
|
if ((test_substream->runtime->format &&
|
test_substream->runtime->format != format) ||
|
(test_substream->runtime->rate &&
|
test_substream->runtime->rate != rate)) {
|
err = -EINVAL;
|
goto error;
|
}
|
}
|
|
error:
|
mutex_unlock(&usx2y(card)->pcm_mutex);
|
return err;
|
}
|
|
/*
|
* free the buffer
|
*/
|
static int snd_usx2y_pcm_hw_free(struct snd_pcm_substream *substream)
|
{
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
struct snd_usx2y_substream *subs = runtime->private_data;
|
mutex_lock(&subs->usx2y->pcm_mutex);
|
snd_printdd("snd_usx2y_hw_free(%p)\n", substream);
|
|
if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
|
struct snd_usx2y_substream *cap_subs = subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE];
|
atomic_set(&subs->state, STATE_STOPPED);
|
usx2y_urbs_release(subs);
|
if (!cap_subs->pcm_substream ||
|
!cap_subs->pcm_substream->runtime ||
|
!cap_subs->pcm_substream->runtime->status ||
|
cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
|
atomic_set(&cap_subs->state, STATE_STOPPED);
|
usx2y_urbs_release(cap_subs);
|
}
|
} else {
|
struct snd_usx2y_substream *playback_subs = subs->usx2y->subs[SNDRV_PCM_STREAM_PLAYBACK];
|
if (atomic_read(&playback_subs->state) < STATE_PREPARED) {
|
atomic_set(&subs->state, STATE_STOPPED);
|
usx2y_urbs_release(subs);
|
}
|
}
|
mutex_unlock(&subs->usx2y->pcm_mutex);
|
return 0;
|
}
|
/*
|
* prepare callback
|
*
|
* set format and initialize urbs
|
*/
|
static int snd_usx2y_pcm_prepare(struct snd_pcm_substream *substream)
|
{
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
struct snd_usx2y_substream *subs = runtime->private_data;
|
struct usx2ydev *usx2y = subs->usx2y;
|
struct snd_usx2y_substream *capsubs = subs->usx2y->subs[SNDRV_PCM_STREAM_CAPTURE];
|
int err = 0;
|
snd_printdd("snd_usx2y_pcm_prepare(%p)\n", substream);
|
|
mutex_lock(&usx2y->pcm_mutex);
|
usx2y_subs_prepare(subs);
|
// Start hardware streams
|
// SyncStream first....
|
if (atomic_read(&capsubs->state) < STATE_PREPARED) {
|
if (usx2y->format != runtime->format)
|
if ((err = usx2y_format_set(usx2y, runtime->format)) < 0)
|
goto up_prepare_mutex;
|
if (usx2y->rate != runtime->rate)
|
if ((err = usx2y_rate_set(usx2y, runtime->rate)) < 0)
|
goto up_prepare_mutex;
|
snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
|
if (0 > (err = usx2y_urbs_start(capsubs)))
|
goto up_prepare_mutex;
|
}
|
|
if (subs != capsubs && atomic_read(&subs->state) < STATE_PREPARED)
|
err = usx2y_urbs_start(subs);
|
|
up_prepare_mutex:
|
mutex_unlock(&usx2y->pcm_mutex);
|
return err;
|
}
|
|
static const struct snd_pcm_hardware snd_usx2y_2c =
|
{
|
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
|
SNDRV_PCM_INFO_BLOCK_TRANSFER |
|
SNDRV_PCM_INFO_MMAP_VALID |
|
SNDRV_PCM_INFO_BATCH),
|
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
|
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
|
.rate_min = 44100,
|
.rate_max = 48000,
|
.channels_min = 2,
|
.channels_max = 2,
|
.buffer_bytes_max = (2*128*1024),
|
.period_bytes_min = 64,
|
.period_bytes_max = (128*1024),
|
.periods_min = 2,
|
.periods_max = 1024,
|
.fifo_size = 0
|
};
|
|
|
|
static int snd_usx2y_pcm_open(struct snd_pcm_substream *substream)
|
{
|
struct snd_usx2y_substream *subs = ((struct snd_usx2y_substream **)
|
snd_pcm_substream_chip(substream))[substream->stream];
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
if (subs->usx2y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
|
return -EBUSY;
|
|
runtime->hw = snd_usx2y_2c;
|
runtime->private_data = subs;
|
subs->pcm_substream = substream;
|
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
|
return 0;
|
}
|
|
|
|
static int snd_usx2y_pcm_close(struct snd_pcm_substream *substream)
|
{
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
struct snd_usx2y_substream *subs = runtime->private_data;
|
|
subs->pcm_substream = NULL;
|
|
return 0;
|
}
|
|
|
static const struct snd_pcm_ops snd_usx2y_pcm_ops =
|
{
|
.open = snd_usx2y_pcm_open,
|
.close = snd_usx2y_pcm_close,
|
.hw_params = snd_usx2y_pcm_hw_params,
|
.hw_free = snd_usx2y_pcm_hw_free,
|
.prepare = snd_usx2y_pcm_prepare,
|
.trigger = snd_usx2y_pcm_trigger,
|
.pointer = snd_usx2y_pcm_pointer,
|
};
|
|
|
/*
|
* free a usb stream instance
|
*/
|
static void usx2y_audio_stream_free(struct snd_usx2y_substream **usx2y_substream)
|
{
|
int stream;
|
|
for_each_pcm_streams(stream) {
|
kfree(usx2y_substream[stream]);
|
usx2y_substream[stream] = NULL;
|
}
|
}
|
|
static void snd_usx2y_pcm_private_free(struct snd_pcm *pcm)
|
{
|
struct snd_usx2y_substream **usx2y_stream = pcm->private_data;
|
if (usx2y_stream)
|
usx2y_audio_stream_free(usx2y_stream);
|
}
|
|
static int usx2y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
|
{
|
struct snd_pcm *pcm;
|
int err, i;
|
struct snd_usx2y_substream **usx2y_substream =
|
usx2y(card)->subs + 2 * usx2y(card)->pcm_devs;
|
|
for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
|
i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
|
usx2y_substream[i] = kzalloc(sizeof(struct snd_usx2y_substream), GFP_KERNEL);
|
if (!usx2y_substream[i])
|
return -ENOMEM;
|
|
usx2y_substream[i]->usx2y = usx2y(card);
|
}
|
|
if (playback_endpoint)
|
usx2y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
|
usx2y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
|
|
err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usx2y(card)->pcm_devs,
|
playback_endpoint ? 1 : 0, 1,
|
&pcm);
|
if (err < 0) {
|
usx2y_audio_stream_free(usx2y_substream);
|
return err;
|
}
|
|
if (playback_endpoint)
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usx2y_pcm_ops);
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usx2y_pcm_ops);
|
|
pcm->private_data = usx2y_substream;
|
pcm->private_free = snd_usx2y_pcm_private_free;
|
pcm->info_flags = 0;
|
|
sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usx2y(card)->pcm_devs);
|
|
if (playback_endpoint) {
|
snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
|
SNDRV_DMA_TYPE_CONTINUOUS,
|
NULL,
|
64*1024, 128*1024);
|
}
|
|
snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
|
SNDRV_DMA_TYPE_CONTINUOUS,
|
NULL,
|
64*1024, 128*1024);
|
usx2y(card)->pcm_devs++;
|
|
return 0;
|
}
|
|
/*
|
* create a chip instance and set its names.
|
*/
|
int usx2y_audio_create(struct snd_card *card)
|
{
|
int err = 0;
|
|
INIT_LIST_HEAD(&usx2y(card)->pcm_list);
|
|
if (0 > (err = usx2y_audio_stream_new(card, 0xA, 0x8)))
|
return err;
|
if (le16_to_cpu(usx2y(card)->dev->descriptor.idProduct) == USB_ID_US428)
|
if (0 > (err = usx2y_audio_stream_new(card, 0, 0xA)))
|
return err;
|
if (le16_to_cpu(usx2y(card)->dev->descriptor.idProduct) != USB_ID_US122)
|
err = usx2y_rate_set(usx2y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.
|
return err;
|
}
|
