mirror of https://gitee.com/openkylin/linux.git
795 lines
24 KiB
C
795 lines
24 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* USX2Y "rawusb" aka hwdep_pcm implementation
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Its usb's unableness to atomically handle power of 2 period sized data chuncs
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at standard samplerates,
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what led to this part of the usx2y module:
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It provides the alsa kernel half of the usx2y-alsa-jack driver pair.
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The pair uses a hardware dependent alsa-device for mmaped pcm transport.
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Advantage achieved:
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The usb_hc moves pcm data from/into memory via DMA.
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That memory is mmaped by jack's usx2y driver.
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Jack's usx2y driver is the first/last to read/write pcm data.
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Read/write is a combination of power of 2 period shaping and
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float/int conversation.
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Compared to mainline alsa/jack we leave out power of 2 period shaping inside
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snd-usb-usx2y which needs memcpy() and additional buffers.
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As a side effect possible unwanted pcm-data coruption resulting of
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standard alsa's snd-usb-usx2y period shaping scheme falls away.
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Result is sane jack operation at buffering schemes down to 128frames,
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2 periods.
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plain usx2y alsa mode is able to achieve 64frames, 4periods, but only at the
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cost of easier triggered i.e. aeolus xruns (128 or 256frames,
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2periods works but is useless cause of crackling).
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This is a first "proof of concept" implementation.
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Later, functionalities should migrate to more appropriate places:
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Userland:
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- The jackd could mmap its float-pcm buffers directly from alsa-lib.
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- alsa-lib could provide power of 2 period sized shaping combined with int/float
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conversation.
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Currently the usx2y jack driver provides above 2 services.
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Kernel:
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- rawusb dma pcm buffer transport should go to snd-usb-lib, so also snd-usb-audio
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devices can use it.
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Currently rawusb dma pcm buffer transport (this file) is only available to snd-usb-usx2y.
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*/
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#include <linux/delay.h>
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#include <linux/gfp.h>
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#include "usbusx2yaudio.c"
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#if defined(USX2Y_NRPACKS_VARIABLE) || USX2Y_NRPACKS == 1
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#include <sound/hwdep.h>
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static int usX2Y_usbpcm_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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int i, lens = 0, hwptr_done = subs->hwptr_done;
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struct usX2Ydev *usX2Y = subs->usX2Y;
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if (0 > usX2Y->hwdep_pcm_shm->capture_iso_start) { //FIXME
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int head = usX2Y->hwdep_pcm_shm->captured_iso_head + 1;
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if (head >= ARRAY_SIZE(usX2Y->hwdep_pcm_shm->captured_iso))
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head = 0;
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usX2Y->hwdep_pcm_shm->capture_iso_start = head;
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snd_printdd("cap start %i\n", head);
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}
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for (i = 0; i < nr_of_packs(); i++) {
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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. Most probably some hardware problem.\n", 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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lens += urb->iso_frame_desc[i].actual_length / usX2Y->stride;
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}
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if ((hwptr_done += lens) >= 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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}
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return 0;
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}
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static inline int usX2Y_iso_frames_per_buffer(struct snd_pcm_runtime *runtime,
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struct usX2Ydev * usX2Y)
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{
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return (runtime->buffer_size * 1000) / usX2Y->rate + 1; //FIXME: so far only correct period_size == 2^x ?
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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_hwdep_urb_play_prepare(struct snd_usX2Y_substream *subs,
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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_usX2Y_hwdep_pcm_shm *shm = usX2Y->hwdep_pcm_shm;
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struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
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if (0 > shm->playback_iso_start) {
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shm->playback_iso_start = shm->captured_iso_head -
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usX2Y_iso_frames_per_buffer(runtime, usX2Y);
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if (0 > shm->playback_iso_start)
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shm->playback_iso_start += ARRAY_SIZE(shm->captured_iso);
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shm->playback_iso_head = shm->playback_iso_start;
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}
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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 = shm->captured_iso[shm->playback_iso_head].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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return -EPIPE;
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}
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/* set up descriptor */
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urb->iso_frame_desc[pack].offset = shm->captured_iso[shm->playback_iso_head].offset;
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urb->iso_frame_desc[pack].length = shm->captured_iso[shm->playback_iso_head].length;
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if (atomic_read(&subs->state) != state_RUNNING)
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memset((char *)urb->transfer_buffer + urb->iso_frame_desc[pack].offset, 0,
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urb->iso_frame_desc[pack].length);
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if (++shm->playback_iso_head >= ARRAY_SIZE(shm->captured_iso))
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shm->playback_iso_head = 0;
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count += counts;
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}
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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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static inline void usX2Y_usbpcm_urb_capt_iso_advance(struct snd_usX2Y_substream *subs,
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struct urb *urb)
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{
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int pack;
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for (pack = 0; pack < nr_of_packs(); ++pack) {
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struct usb_iso_packet_descriptor *desc = urb->iso_frame_desc + pack;
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if (NULL != subs) {
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struct snd_usX2Y_hwdep_pcm_shm *shm = subs->usX2Y->hwdep_pcm_shm;
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int head = shm->captured_iso_head + 1;
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if (head >= ARRAY_SIZE(shm->captured_iso))
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head = 0;
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shm->captured_iso[head].frame = urb->start_frame + pack;
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shm->captured_iso[head].offset = desc->offset;
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shm->captured_iso[head].length = desc->actual_length;
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shm->captured_iso_head = head;
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shm->captured_iso_frames++;
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}
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if ((desc->offset += desc->length * NRURBS*nr_of_packs()) +
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desc->length >= SSS)
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desc->offset -= (SSS - desc->length);
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}
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}
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static inline int usX2Y_usbpcm_usbframe_complete(struct snd_usX2Y_substream *capsubs,
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struct snd_usX2Y_substream *capsubs2,
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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_hwdep_urb_play_prepare(playbacksubs, 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_usbpcm_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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usX2Y_usbpcm_urb_capt_iso_advance(capsubs, capsubs->completed_urb);
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if (NULL != capsubs2)
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usX2Y_usbpcm_urb_capt_iso_advance(NULL, capsubs2->completed_urb);
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if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
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return err;
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if (NULL != capsubs2)
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if ((err = usX2Y_urb_submit(capsubs2, capsubs2->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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if (NULL != capsubs2)
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capsubs2->completed_urb = NULL;
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return 0;
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}
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static void i_usX2Y_usbpcm_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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struct snd_usX2Y_substream *capsubs, *capsubs2, *playbacksubs;
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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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return;
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}
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if (unlikely(urb->status)) {
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usX2Y_error_urb_status(usX2Y, subs, urb);
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return;
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}
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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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else {
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usX2Y_error_sequence(usX2Y, subs, urb);
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return;
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}
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capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
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capsubs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
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playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
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if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED &&
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(NULL == capsubs2 || capsubs2->completed_urb) &&
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(playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) {
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if (!usX2Y_usbpcm_usbframe_complete(capsubs, capsubs2, playbacksubs, urb->start_frame))
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usX2Y->wait_iso_frame += nr_of_packs();
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else {
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snd_printdd("\n");
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usX2Y_clients_stop(usX2Y);
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}
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}
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}
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static void usX2Y_hwdep_urb_release(struct urb **urb)
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{
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usb_kill_urb(*urb);
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usb_free_urb(*urb);
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*urb = NULL;
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}
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/*
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* release a substream
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*/
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static void usX2Y_usbpcm_urbs_release(struct snd_usX2Y_substream *subs)
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{
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int i;
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snd_printdd("snd_usX2Y_urbs_release() %i\n", subs->endpoint);
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for (i = 0; i < NRURBS; i++)
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usX2Y_hwdep_urb_release(subs->urb + i);
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}
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static void usX2Y_usbpcm_subs_startup_finish(struct usX2Ydev * usX2Y)
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{
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usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_urb_complete);
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usX2Y->prepare_subs = NULL;
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}
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static void i_usX2Y_usbpcm_subs_startup(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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struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
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if (NULL != prepare_subs &&
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urb->start_frame == prepare_subs->urb[0]->start_frame) {
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atomic_inc(&prepare_subs->state);
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if (prepare_subs == usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]) {
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struct snd_usX2Y_substream *cap_subs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
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if (cap_subs2 != NULL)
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atomic_inc(&cap_subs2->state);
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}
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usX2Y_usbpcm_subs_startup_finish(usX2Y);
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wake_up(&usX2Y->prepare_wait_queue);
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}
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i_usX2Y_usbpcm_urb_complete(urb);
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}
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/*
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* initialize a substream's urbs
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*/
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static int usX2Y_usbpcm_urbs_allocate(struct snd_usX2Y_substream *subs)
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{
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int i;
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unsigned int pipe;
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int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
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struct usb_device *dev = subs->usX2Y->dev;
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pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
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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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return -EINVAL;
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/* allocate and initialize data urbs */
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for (i = 0; i < NRURBS; i++) {
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struct urb **purb = subs->urb + i;
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if (*purb) {
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usb_kill_urb(*purb);
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continue;
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}
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*purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
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if (NULL == *purb) {
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usX2Y_usbpcm_urbs_release(subs);
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return -ENOMEM;
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}
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(*purb)->transfer_buffer = is_playback ?
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subs->usX2Y->hwdep_pcm_shm->playback : (
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subs->endpoint == 0x8 ?
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subs->usX2Y->hwdep_pcm_shm->capture0x8 :
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subs->usX2Y->hwdep_pcm_shm->capture0xA);
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(*purb)->dev = dev;
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(*purb)->pipe = pipe;
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(*purb)->number_of_packets = nr_of_packs();
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(*purb)->context = subs;
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(*purb)->interval = 1;
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(*purb)->complete = i_usX2Y_usbpcm_subs_startup;
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}
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return 0;
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}
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/*
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* free the buffer
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*/
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static int snd_usX2Y_usbpcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_usX2Y_substream *subs = runtime->private_data,
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*cap_subs2 = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
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mutex_lock(&subs->usX2Y->prepare_mutex);
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snd_printdd("snd_usX2Y_usbpcm_hw_free(%p)\n", substream);
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if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
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struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
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atomic_set(&subs->state, state_STOPPED);
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usX2Y_usbpcm_urbs_release(subs);
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if (!cap_subs->pcm_substream ||
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!cap_subs->pcm_substream->runtime ||
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!cap_subs->pcm_substream->runtime->status ||
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cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
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atomic_set(&cap_subs->state, state_STOPPED);
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if (NULL != cap_subs2)
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atomic_set(&cap_subs2->state, state_STOPPED);
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usX2Y_usbpcm_urbs_release(cap_subs);
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if (NULL != cap_subs2)
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usX2Y_usbpcm_urbs_release(cap_subs2);
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}
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} else {
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struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
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if (atomic_read(&playback_subs->state) < state_PREPARED) {
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atomic_set(&subs->state, state_STOPPED);
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if (NULL != cap_subs2)
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atomic_set(&cap_subs2->state, state_STOPPED);
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usX2Y_usbpcm_urbs_release(subs);
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if (NULL != cap_subs2)
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usX2Y_usbpcm_urbs_release(cap_subs2);
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}
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}
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mutex_unlock(&subs->usX2Y->prepare_mutex);
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return snd_pcm_lib_free_pages(substream);
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}
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static void usX2Y_usbpcm_subs_startup(struct snd_usX2Y_substream *subs)
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{
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struct usX2Ydev * usX2Y = subs->usX2Y;
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usX2Y->prepare_subs = subs;
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subs->urb[0]->start_frame = -1;
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smp_wmb(); // Make sure above modifications are seen by i_usX2Y_subs_startup()
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usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_subs_startup);
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}
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static int usX2Y_usbpcm_urbs_start(struct snd_usX2Y_substream *subs)
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{
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int p, u, err,
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stream = subs->pcm_substream->stream;
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struct usX2Ydev *usX2Y = subs->usX2Y;
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if (SNDRV_PCM_STREAM_CAPTURE == stream) {
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usX2Y->hwdep_pcm_shm->captured_iso_head = -1;
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usX2Y->hwdep_pcm_shm->captured_iso_frames = 0;
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|
}
|
|
|
|
for (p = 0; 3 >= (stream + p); p += 2) {
|
|
struct snd_usX2Y_substream *subs = usX2Y->subs[stream + p];
|
|
if (subs != NULL) {
|
|
if ((err = usX2Y_usbpcm_urbs_allocate(subs)) < 0)
|
|
return err;
|
|
subs->completed_urb = NULL;
|
|
}
|
|
}
|
|
|
|
for (p = 0; p < 4; p++) {
|
|
struct snd_usX2Y_substream *subs = usX2Y->subs[p];
|
|
if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
|
|
goto start;
|
|
}
|
|
|
|
start:
|
|
usX2Y_usbpcm_subs_startup(subs);
|
|
for (u = 0; u < NRURBS; u++) {
|
|
for (p = 0; 3 >= (stream + p); p += 2) {
|
|
struct snd_usX2Y_substream *subs = usX2Y->subs[stream + p];
|
|
if (subs != NULL) {
|
|
struct urb *urb = subs->urb[u];
|
|
if (usb_pipein(urb->pipe)) {
|
|
unsigned long pack;
|
|
if (0 == u)
|
|
atomic_set(&subs->state, state_STARTING3);
|
|
urb->dev = usX2Y->dev;
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
for (pack = 0; pack < nr_of_packs(); pack++) {
|
|
urb->iso_frame_desc[pack].offset = subs->maxpacksize * (pack + u * nr_of_packs());
|
|
urb->iso_frame_desc[pack].length = subs->maxpacksize;
|
|
}
|
|
urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
|
|
if ((err = usb_submit_urb(urb, GFP_KERNEL)) < 0) {
|
|
snd_printk (KERN_ERR "cannot usb_submit_urb() for urb %d, err = %d\n", u, err);
|
|
err = -EPIPE;
|
|
goto cleanup;
|
|
} else {
|
|
snd_printdd("%i\n", urb->start_frame);
|
|
if (u == 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); // Call it now
|
|
usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* prepare callback
|
|
*
|
|
* set format and initialize urbs
|
|
*/
|
|
static int snd_usX2Y_usbpcm_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);
|
|
|
|
if (NULL == usX2Y->hwdep_pcm_shm) {
|
|
if (NULL == (usX2Y->hwdep_pcm_shm = snd_malloc_pages(sizeof(struct snd_usX2Y_hwdep_pcm_shm), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
memset(usX2Y->hwdep_pcm_shm, 0, sizeof(struct snd_usX2Y_hwdep_pcm_shm));
|
|
}
|
|
|
|
mutex_lock(&usX2Y->prepare_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_usbpcm_urbs_start(capsubs)))
|
|
goto up_prepare_mutex;
|
|
}
|
|
|
|
if (subs != capsubs) {
|
|
usX2Y->hwdep_pcm_shm->playback_iso_start = -1;
|
|
if (atomic_read(&subs->state) < state_PREPARED) {
|
|
while (usX2Y_iso_frames_per_buffer(runtime, usX2Y) >
|
|
usX2Y->hwdep_pcm_shm->captured_iso_frames) {
|
|
snd_printdd("Wait: iso_frames_per_buffer=%i,"
|
|
"captured_iso_frames=%i\n",
|
|
usX2Y_iso_frames_per_buffer(runtime, usX2Y),
|
|
usX2Y->hwdep_pcm_shm->captured_iso_frames);
|
|
if (msleep_interruptible(10)) {
|
|
err = -ERESTARTSYS;
|
|
goto up_prepare_mutex;
|
|
}
|
|
}
|
|
if (0 > (err = usX2Y_usbpcm_urbs_start(subs)))
|
|
goto up_prepare_mutex;
|
|
}
|
|
snd_printdd("Ready: iso_frames_per_buffer=%i,captured_iso_frames=%i\n",
|
|
usX2Y_iso_frames_per_buffer(runtime, usX2Y),
|
|
usX2Y->hwdep_pcm_shm->captured_iso_frames);
|
|
} else
|
|
usX2Y->hwdep_pcm_shm->capture_iso_start = -1;
|
|
|
|
up_prepare_mutex:
|
|
mutex_unlock(&usX2Y->prepare_mutex);
|
|
return err;
|
|
}
|
|
|
|
static struct snd_pcm_hardware snd_usX2Y_4c =
|
|
{
|
|
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
|
|
SNDRV_PCM_INFO_BLOCK_TRANSFER |
|
|
SNDRV_PCM_INFO_MMAP_VALID),
|
|
.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 = 4,
|
|
.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_usbpcm_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 = SNDRV_PCM_STREAM_PLAYBACK == substream->stream ? snd_usX2Y_2c :
|
|
(subs->usX2Y->subs[3] ? snd_usX2Y_4c : 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_usbpcm_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 struct snd_pcm_ops snd_usX2Y_usbpcm_ops =
|
|
{
|
|
.open = snd_usX2Y_usbpcm_open,
|
|
.close = snd_usX2Y_usbpcm_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = snd_usX2Y_pcm_hw_params,
|
|
.hw_free = snd_usX2Y_usbpcm_hw_free,
|
|
.prepare = snd_usX2Y_usbpcm_prepare,
|
|
.trigger = snd_usX2Y_pcm_trigger,
|
|
.pointer = snd_usX2Y_pcm_pointer,
|
|
};
|
|
|
|
|
|
static int usX2Y_pcms_lock_check(struct snd_card *card)
|
|
{
|
|
struct list_head *list;
|
|
struct snd_device *dev;
|
|
struct snd_pcm *pcm;
|
|
int err = 0;
|
|
list_for_each(list, &card->devices) {
|
|
dev = snd_device(list);
|
|
if (dev->type != SNDRV_DEV_PCM)
|
|
continue;
|
|
pcm = dev->device_data;
|
|
mutex_lock(&pcm->open_mutex);
|
|
}
|
|
list_for_each(list, &card->devices) {
|
|
int s;
|
|
dev = snd_device(list);
|
|
if (dev->type != SNDRV_DEV_PCM)
|
|
continue;
|
|
pcm = dev->device_data;
|
|
for (s = 0; s < 2; ++s) {
|
|
struct snd_pcm_substream *substream;
|
|
substream = pcm->streams[s].substream;
|
|
if (substream && SUBSTREAM_BUSY(substream))
|
|
err = -EBUSY;
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
|
|
static void usX2Y_pcms_unlock(struct snd_card *card)
|
|
{
|
|
struct list_head *list;
|
|
struct snd_device *dev;
|
|
struct snd_pcm *pcm;
|
|
list_for_each(list, &card->devices) {
|
|
dev = snd_device(list);
|
|
if (dev->type != SNDRV_DEV_PCM)
|
|
continue;
|
|
pcm = dev->device_data;
|
|
mutex_unlock(&pcm->open_mutex);
|
|
}
|
|
}
|
|
|
|
|
|
static int snd_usX2Y_hwdep_pcm_open(struct snd_hwdep *hw, struct file *file)
|
|
{
|
|
// we need to be the first
|
|
struct snd_card *card = hw->card;
|
|
int err = usX2Y_pcms_lock_check(card);
|
|
if (0 == err)
|
|
usX2Y(card)->chip_status |= USX2Y_STAT_CHIP_MMAP_PCM_URBS;
|
|
usX2Y_pcms_unlock(card);
|
|
return err;
|
|
}
|
|
|
|
|
|
static int snd_usX2Y_hwdep_pcm_release(struct snd_hwdep *hw, struct file *file)
|
|
{
|
|
struct snd_card *card = hw->card;
|
|
int err = usX2Y_pcms_lock_check(card);
|
|
if (0 == err)
|
|
usX2Y(hw->card)->chip_status &= ~USX2Y_STAT_CHIP_MMAP_PCM_URBS;
|
|
usX2Y_pcms_unlock(card);
|
|
return err;
|
|
}
|
|
|
|
|
|
static void snd_usX2Y_hwdep_pcm_vm_open(struct vm_area_struct *area)
|
|
{
|
|
}
|
|
|
|
|
|
static void snd_usX2Y_hwdep_pcm_vm_close(struct vm_area_struct *area)
|
|
{
|
|
}
|
|
|
|
|
|
static int snd_usX2Y_hwdep_pcm_vm_fault(struct vm_area_struct *area,
|
|
struct vm_fault *vmf)
|
|
{
|
|
unsigned long offset;
|
|
void *vaddr;
|
|
|
|
offset = vmf->pgoff << PAGE_SHIFT;
|
|
vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->hwdep_pcm_shm + offset;
|
|
vmf->page = virt_to_page(vaddr);
|
|
get_page(vmf->page);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = {
|
|
.open = snd_usX2Y_hwdep_pcm_vm_open,
|
|
.close = snd_usX2Y_hwdep_pcm_vm_close,
|
|
.fault = snd_usX2Y_hwdep_pcm_vm_fault,
|
|
};
|
|
|
|
|
|
static int snd_usX2Y_hwdep_pcm_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)
|
|
{
|
|
unsigned long size = (unsigned long)(area->vm_end - area->vm_start);
|
|
struct usX2Ydev *usX2Y = hw->private_data;
|
|
|
|
if (!(usX2Y->chip_status & USX2Y_STAT_CHIP_INIT))
|
|
return -EBUSY;
|
|
|
|
/* if userspace tries to mmap beyond end of our buffer, fail */
|
|
if (size > PAGE_ALIGN(sizeof(struct snd_usX2Y_hwdep_pcm_shm))) {
|
|
snd_printd("%lu > %lu\n", size, (unsigned long)sizeof(struct snd_usX2Y_hwdep_pcm_shm));
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!usX2Y->hwdep_pcm_shm) {
|
|
return -ENODEV;
|
|
}
|
|
area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops;
|
|
area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
|
|
area->vm_private_data = hw->private_data;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void snd_usX2Y_hwdep_pcm_private_free(struct snd_hwdep *hwdep)
|
|
{
|
|
struct usX2Ydev *usX2Y = hwdep->private_data;
|
|
if (NULL != usX2Y->hwdep_pcm_shm)
|
|
snd_free_pages(usX2Y->hwdep_pcm_shm, sizeof(struct snd_usX2Y_hwdep_pcm_shm));
|
|
}
|
|
|
|
|
|
int usX2Y_hwdep_pcm_new(struct snd_card *card)
|
|
{
|
|
int err;
|
|
struct snd_hwdep *hw;
|
|
struct snd_pcm *pcm;
|
|
struct usb_device *dev = usX2Y(card)->dev;
|
|
if (1 != nr_of_packs())
|
|
return 0;
|
|
|
|
if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0)
|
|
return err;
|
|
|
|
hw->iface = SNDRV_HWDEP_IFACE_USX2Y_PCM;
|
|
hw->private_data = usX2Y(card);
|
|
hw->private_free = snd_usX2Y_hwdep_pcm_private_free;
|
|
hw->ops.open = snd_usX2Y_hwdep_pcm_open;
|
|
hw->ops.release = snd_usX2Y_hwdep_pcm_release;
|
|
hw->ops.mmap = snd_usX2Y_hwdep_pcm_mmap;
|
|
hw->exclusive = 1;
|
|
sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm", dev->bus->busnum, dev->devnum);
|
|
|
|
err = snd_pcm_new(card, NAME_ALLCAPS" hwdep Audio", 2, 1, 1, &pcm);
|
|
if (err < 0) {
|
|
return err;
|
|
}
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_usbpcm_ops);
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_usbpcm_ops);
|
|
|
|
pcm->private_data = usX2Y(card)->subs;
|
|
pcm->info_flags = 0;
|
|
|
|
sprintf(pcm->name, NAME_ALLCAPS" hwdep Audio");
|
|
if (0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
|
|
SNDRV_DMA_TYPE_CONTINUOUS,
|
|
snd_dma_continuous_data(GFP_KERNEL),
|
|
64*1024, 128*1024)) ||
|
|
0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
|
|
SNDRV_DMA_TYPE_CONTINUOUS,
|
|
snd_dma_continuous_data(GFP_KERNEL),
|
|
64*1024, 128*1024))) {
|
|
return err;
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
int usX2Y_hwdep_pcm_new(struct snd_card *card)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|