--- /dev/null
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* USX2Y "rawusb" aka hwdep_pcm implementation
+
+ Its usb's unableness to atomically handle power of 2 period sized data chuncs
+ at standard samplerates,
+ what led to this part of the usx2y module:
+ It provides the alsa kernel half of the usx2y-alsa-jack driver pair.
+ The pair uses a hardware dependant alsa-device for mmaped pcm transport.
+ Advantage achieved:
+ The usb_hc moves pcm data from/into memory via DMA.
+ That memory is mmaped by jack's usx2y driver.
+ Jack's usx2y driver is the first/last to read/write pcm data.
+ Read/write is a combination of power of 2 period shaping and
+ float/int conversation.
+ Compared to mainline alsa/jack we leave out power of 2 period shaping inside
+ snd-usb-usx2y which needs memcpy() and additional buffers.
+ As a side effect possible unwanted pcm-data coruption resulting of
+ standard alsa's snd-usb-usx2y period shaping scheme falls away.
+ Result is sane jack operation at buffering schemes down to 128frames,
+ 2 periods.
+ plain usx2y alsa mode is able to achieve 64frames, 4periods, but only at the
+ cost of easier triggered i.e. aeolus xruns (128 or 256frames,
+ 2periods works but is useless cause of crackling).
+
+ This is a first "proof of concept" implementation.
+ Later, funcionalities should migrate to more apropriate places:
+ Userland:
+ - The jackd could mmap its float-pcm buffers directly from alsa-lib.
+ - alsa-lib could provide power of 2 period sized shaping combined with int/float
+ conversation.
+ Currently the usx2y jack driver provides above 2 services.
+ Kernel:
+ - rawusb dma pcm buffer transport should go to snd-usb-lib, so also snd-usb-audio
+ devices can use it.
+ Currently rawusb dma pcm buffer transport (this file) is only available to snd-usb-usx2y.
+*/
+
+#include "usbusx2yaudio.c"
+
+#if defined(USX2Y_NRPACKS_VARIABLE) || (!defined(USX2Y_NRPACKS_VARIABLE) && USX2Y_NRPACKS == 1)
+
+#include <sound/hwdep.h>
+
+
+static int usX2Y_usbpcm_urb_capt_retire(snd_usX2Y_substream_t *subs)
+{
+ struct urb *urb = subs->completed_urb;
+ snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+ int i, lens = 0, hwptr_done = subs->hwptr_done;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+ if (0 > usX2Y->hwdep_pcm_shm->capture_iso_start) { //FIXME
+ int head = usX2Y->hwdep_pcm_shm->captured_iso_head + 1;
+ if (head >= ARRAY_SIZE(usX2Y->hwdep_pcm_shm->captured_iso))
+ head = 0;
+ usX2Y->hwdep_pcm_shm->capture_iso_start = head;
+ snd_printdd("cap start %i\n", head);
+ }
+ for (i = 0; i < nr_of_packs(); i++) {
+ if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
+ snd_printk("activ frame status %i. Most propably some hardware problem.\n", urb->iso_frame_desc[i].status);
+ return urb->iso_frame_desc[i].status;
+ }
+ lens += urb->iso_frame_desc[i].actual_length / usX2Y->stride;
+ }
+ if ((hwptr_done += lens) >= runtime->buffer_size)
+ hwptr_done -= runtime->buffer_size;
+ subs->hwptr_done = hwptr_done;
+ subs->transfer_done += lens;
+ /* update the pointer, call callback if necessary */
+ if (subs->transfer_done >= runtime->period_size) {
+ subs->transfer_done -= runtime->period_size;
+ snd_pcm_period_elapsed(subs->pcm_substream);
+ }
+ return 0;
+}
+
+static inline int usX2Y_iso_frames_per_buffer(snd_pcm_runtime_t *runtime, usX2Ydev_t * usX2Y)
+{
+ return (runtime->buffer_size * 1000) / usX2Y->rate + 1; //FIXME: so far only correct period_size == 2^x ?
+}
+
+/*
+ * prepare urb for playback data pipe
+ *
+ * we copy the data directly from the pcm buffer.
+ * the current position to be copied is held in hwptr field.
+ * since a urb can handle only a single linear buffer, if the total
+ * transferred area overflows the buffer boundary, we cannot send
+ * it directly from the buffer. thus the data is once copied to
+ * a temporary buffer and urb points to that.
+ */
+static int usX2Y_hwdep_urb_play_prepare(snd_usX2Y_substream_t *subs,
+ struct urb *urb)
+{
+ int count, counts, pack;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+ struct snd_usX2Y_hwdep_pcm_shm *shm = usX2Y->hwdep_pcm_shm;
+ snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+
+ if (0 > shm->playback_iso_start) {
+ shm->playback_iso_start = shm->captured_iso_head -
+ usX2Y_iso_frames_per_buffer(runtime, usX2Y);
+ if (0 > shm->playback_iso_start)
+ shm->playback_iso_start += ARRAY_SIZE(shm->captured_iso);
+ shm->playback_iso_head = shm->playback_iso_start;
+ }
+
+ count = 0;
+ for (pack = 0; pack < nr_of_packs(); pack++) {
+ /* calculate the size of a packet */
+ counts = shm->captured_iso[shm->playback_iso_head].length / usX2Y->stride;
+ if (counts < 43 || counts > 50) {
+ snd_printk("should not be here with counts=%i\n", counts);
+ return -EPIPE;
+ }
+ /* set up descriptor */
+ urb->iso_frame_desc[pack].offset = shm->captured_iso[shm->playback_iso_head].offset;
+ urb->iso_frame_desc[pack].length = shm->captured_iso[shm->playback_iso_head].length;
+ if (atomic_read(&subs->state) != state_RUNNING)
+ memset((char *)urb->transfer_buffer + urb->iso_frame_desc[pack].offset, 0,
+ urb->iso_frame_desc[pack].length);
+ if (++shm->playback_iso_head >= ARRAY_SIZE(shm->captured_iso))
+ shm->playback_iso_head = 0;
+ count += counts;
+ }
+ urb->transfer_buffer_length = count * usX2Y->stride;
+ return 0;
+}
+
+
+static inline void usX2Y_usbpcm_urb_capt_iso_advance(snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+ int pack;
+ for (pack = 0; pack < nr_of_packs(); ++pack) {
+ struct usb_iso_packet_descriptor *desc = urb->iso_frame_desc + pack;
+ if (NULL != subs) {
+ snd_usX2Y_hwdep_pcm_shm_t *shm = subs->usX2Y->hwdep_pcm_shm;
+ int head = shm->captured_iso_head + 1;
+ if (head >= ARRAY_SIZE(shm->captured_iso))
+ head = 0;
+ shm->captured_iso[head].frame = urb->start_frame + pack;
+ shm->captured_iso[head].offset = desc->offset;
+ shm->captured_iso[head].length = desc->actual_length;
+ shm->captured_iso_head = head;
+ shm->captured_iso_frames++;
+ }
+ if ((desc->offset += desc->length * NRURBS*nr_of_packs()) +
+ desc->length >= SSS)
+ desc->offset -= (SSS - desc->length);
+ }
+}
+
+static inline int usX2Y_usbpcm_usbframe_complete(snd_usX2Y_substream_t *capsubs,
+ snd_usX2Y_substream_t *capsubs2,
+ snd_usX2Y_substream_t *playbacksubs, int frame)
+{
+ int err, state;
+ struct urb *urb = playbacksubs->completed_urb;
+
+ state = atomic_read(&playbacksubs->state);
+ if (NULL != urb) {
+ if (state == state_RUNNING)
+ usX2Y_urb_play_retire(playbacksubs, urb);
+ else
+ if (state >= state_PRERUNNING) {
+ atomic_inc(&playbacksubs->state);
+ }
+ } else {
+ switch (state) {
+ case state_STARTING1:
+ urb = playbacksubs->urb[0];
+ atomic_inc(&playbacksubs->state);
+ break;
+ case state_STARTING2:
+ urb = playbacksubs->urb[1];
+ atomic_inc(&playbacksubs->state);
+ break;
+ }
+ }
+ if (urb) {
+ if ((err = usX2Y_hwdep_urb_play_prepare(playbacksubs, urb)) ||
+ (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
+ return err;
+ }
+ }
+
+ playbacksubs->completed_urb = NULL;
+
+ state = atomic_read(&capsubs->state);
+ if (state >= state_PREPARED) {
+ if (state == state_RUNNING) {
+ if ((err = usX2Y_usbpcm_urb_capt_retire(capsubs)))
+ return err;
+ } else {
+ if (state >= state_PRERUNNING)
+ atomic_inc(&capsubs->state);
+ }
+ usX2Y_usbpcm_urb_capt_iso_advance(capsubs, capsubs->completed_urb);
+ if (NULL != capsubs2)
+ usX2Y_usbpcm_urb_capt_iso_advance(NULL, capsubs2->completed_urb);
+ if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
+ return err;
+ if (NULL != capsubs2)
+ if ((err = usX2Y_urb_submit(capsubs2, capsubs2->completed_urb, frame)))
+ return err;
+ }
+ capsubs->completed_urb = NULL;
+ if (NULL != capsubs2)
+ capsubs2->completed_urb = NULL;
+ return 0;
+}
+
+
+static void i_usX2Y_usbpcm_urb_complete(struct urb *urb, struct pt_regs *regs)
+{
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+ snd_usX2Y_substream_t *capsubs, *capsubs2, *playbacksubs;
+
+ if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
+ snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", usb_get_current_frame_number(usX2Y->chip.dev), subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", urb->status, urb->start_frame);
+ return;
+ }
+ if (unlikely(urb->status)) {
+ usX2Y_error_urb_status(usX2Y, subs, urb);
+ return;
+ }
+ if (likely((0xFFFF & urb->start_frame) == usX2Y->wait_iso_frame))
+ subs->completed_urb = urb;
+ else {
+ usX2Y_error_sequence(usX2Y, subs, urb);
+ return;
+ }
+
+ capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+ capsubs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
+ playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+ if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED &&
+ (NULL == capsubs2 || capsubs2->completed_urb) &&
+ (playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) {
+ if (!usX2Y_usbpcm_usbframe_complete(capsubs, capsubs2, playbacksubs, urb->start_frame)) {
+ if (nr_of_packs() <= urb->start_frame &&
+ urb->start_frame <= (2 * nr_of_packs() - 1)) // uhci and ohci
+ usX2Y->wait_iso_frame = urb->start_frame - nr_of_packs();
+ else
+ usX2Y->wait_iso_frame += nr_of_packs();
+ } else {
+ snd_printdd("\n");
+ usX2Y_clients_stop(usX2Y);
+ }
+ }
+}
+
+
+static void usX2Y_hwdep_urb_release(struct urb** urb)
+{
+ usb_kill_urb(*urb);
+ usb_free_urb(*urb);
+ *urb = NULL;
+}
+
+/*
+ * release a substream
+ */
+static void usX2Y_usbpcm_urbs_release(snd_usX2Y_substream_t *subs)
+{
+ int i;
+ snd_printdd("snd_usX2Y_urbs_release() %i\n", subs->endpoint);
+ for (i = 0; i < NRURBS; i++)
+ usX2Y_hwdep_urb_release(subs->urb + i);
+}
+
+static void usX2Y_usbpcm_subs_startup_finish(usX2Ydev_t * usX2Y)
+{
+ usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_urb_complete);
+ usX2Y->prepare_subs = NULL;
+}
+
+static void i_usX2Y_usbpcm_subs_startup(struct urb *urb, struct pt_regs *regs)
+{
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+ snd_usX2Y_substream_t *prepare_subs = usX2Y->prepare_subs;
+ if (NULL != prepare_subs &&
+ urb->start_frame == prepare_subs->urb[0]->start_frame) {
+ atomic_inc(&prepare_subs->state);
+ if (prepare_subs == usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]) {
+ snd_usX2Y_substream_t *cap_subs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
+ if (cap_subs2 != NULL)
+ atomic_inc(&cap_subs2->state);
+ }
+ usX2Y_usbpcm_subs_startup_finish(usX2Y);
+ wake_up(&usX2Y->prepare_wait_queue);
+ }
+
+ i_usX2Y_usbpcm_urb_complete(urb, regs);
+}
+
+/*
+ * initialize a substream's urbs
+ */
+static int usX2Y_usbpcm_urbs_allocate(snd_usX2Y_substream_t *subs)
+{
+ int i;
+ unsigned int pipe;
+ int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+ struct usb_device *dev = subs->usX2Y->chip.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;
+
+ /* 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_usbpcm_urbs_release(subs);
+ return -ENOMEM;
+ }
+ (*purb)->transfer_buffer = is_playback ?
+ subs->usX2Y->hwdep_pcm_shm->playback : (
+ subs->endpoint == 0x8 ?
+ subs->usX2Y->hwdep_pcm_shm->capture0x8 :
+ subs->usX2Y->hwdep_pcm_shm->capture0xA);
+
+ (*purb)->dev = dev;
+ (*purb)->pipe = pipe;
+ (*purb)->number_of_packets = nr_of_packs();
+ (*purb)->context = subs;
+ (*purb)->interval = 1;
+ (*purb)->complete = i_usX2Y_usbpcm_subs_startup;
+ }
+ return 0;
+}
+
+/*
+ * free the buffer
+ */
+static int snd_usX2Y_usbpcm_hw_free(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data,
+ *cap_subs2 = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
+ down(&subs->usX2Y->prepare_mutex);
+ snd_printdd("snd_usX2Y_usbpcm_hw_free(%p)\n", substream);
+
+ if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
+ snd_usX2Y_substream_t *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+ atomic_set(&subs->state, state_STOPPED);
+ usX2Y_usbpcm_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);
+ if (NULL != cap_subs2)
+ atomic_set(&cap_subs2->state, state_STOPPED);
+ usX2Y_usbpcm_urbs_release(cap_subs);
+ if (NULL != cap_subs2)
+ usX2Y_usbpcm_urbs_release(cap_subs2);
+ }
+ } else {
+ snd_usX2Y_substream_t *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+ if (atomic_read(&playback_subs->state) < state_PREPARED) {
+ atomic_set(&subs->state, state_STOPPED);
+ if (NULL != cap_subs2)
+ atomic_set(&cap_subs2->state, state_STOPPED);
+ usX2Y_usbpcm_urbs_release(subs);
+ if (NULL != cap_subs2)
+ usX2Y_usbpcm_urbs_release(cap_subs2);
+ }
+ }
+ up(&subs->usX2Y->prepare_mutex);
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static void usX2Y_usbpcm_subs_startup(snd_usX2Y_substream_t *subs)
+{
+ usX2Ydev_t * usX2Y = subs->usX2Y;
+ usX2Y->prepare_subs = subs;
+ subs->urb[0]->start_frame = -1;
+ smp_wmb(); // Make shure above modifications are seen by i_usX2Y_subs_startup()
+ usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_subs_startup);
+}
+
+static int usX2Y_usbpcm_urbs_start(snd_usX2Y_substream_t *subs)
+{
+ int p, u, err,
+ stream = subs->pcm_substream->stream;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+
+ if (SNDRV_PCM_STREAM_CAPTURE == stream) {
+ usX2Y->hwdep_pcm_shm->captured_iso_head = -1;
+ usX2Y->hwdep_pcm_shm->captured_iso_frames = 0;
+ }
+
+ for (p = 0; 3 >= (stream + p); p += 2) {
+ snd_usX2Y_substream_t *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++) {
+ snd_usX2Y_substream_t *subs = usX2Y->subs[p];
+ if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
+ goto start;
+ }
+ usX2Y->wait_iso_frame = -1;
+
+ start:
+ usX2Y_usbpcm_subs_startup(subs);
+ for (u = 0; u < NRURBS; u++) {
+ for (p = 0; 3 >= (stream + p); p += 2) {
+ snd_usX2Y_substream_t *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->chip.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 (0 > usX2Y->wait_iso_frame)
+ 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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+ snd_usX2Y_substream_t *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(snd_usX2Y_hwdep_pcm_shm_t), GFP_KERNEL)))
+ return -ENOMEM;
+ memset(usX2Y->hwdep_pcm_shm, 0, sizeof(snd_usX2Y_hwdep_pcm_shm_t));
+ }
+
+ down(&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) {
+ signed long timeout;
+ snd_printd("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);
+ set_current_state(TASK_INTERRUPTIBLE);
+ timeout = schedule_timeout(HZ/100 + 1);
+ if (signal_pending(current)) {
+ err = -ERESTARTSYS;
+ goto up_prepare_mutex;
+ }
+ }
+ if (0 > (err = usX2Y_usbpcm_urbs_start(subs)))
+ goto up_prepare_mutex;
+ }
+ snd_printd("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:
+ up(&usX2Y->prepare_mutex);
+ return err;
+}
+
+static snd_pcm_hardware_t 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(snd_pcm_substream_t *substream)
+{
+ snd_usX2Y_substream_t *subs = ((snd_usX2Y_substream_t **)
+ snd_pcm_substream_chip(substream))[substream->stream];
+ snd_pcm_runtime_t *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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+ int err = 0;
+ snd_printd("\n");
+ subs->pcm_substream = NULL;
+ return err;
+}
+
+
+static snd_pcm_ops_t 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(snd_card_t *card)
+{
+ struct list_head *list;
+ snd_device_t *dev;
+ snd_pcm_t *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;
+ down(&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) {
+ snd_pcm_substream_t *substream;
+ substream = pcm->streams[s].substream;
+ if (substream && substream->open_flag)
+ err = -EBUSY;
+ }
+ }
+ return err;
+}
+
+
+static void usX2Y_pcms_unlock(snd_card_t *card)
+{
+ struct list_head *list;
+ snd_device_t *dev;
+ snd_pcm_t *pcm;
+ list_for_each(list, &card->devices) {
+ dev = snd_device(list);
+ if (dev->type != SNDRV_DEV_PCM)
+ continue;
+ pcm = dev->device_data;
+ up(&pcm->open_mutex);
+ }
+}
+
+
+static int snd_usX2Y_hwdep_pcm_open(snd_hwdep_t *hw, struct file *file)
+{
+ // we need to be the first
+ snd_card_t *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(snd_hwdep_t *hw, struct file *file)
+{
+ snd_card_t *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 struct page * snd_usX2Y_hwdep_pcm_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type)
+{
+ unsigned long offset;
+ struct page *page;
+ void *vaddr;
+
+ offset = area->vm_pgoff << PAGE_SHIFT;
+ offset += address - area->vm_start;
+ snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
+ vaddr = (char*)((usX2Ydev_t*)area->vm_private_data)->hwdep_pcm_shm + offset;
+ page = virt_to_page(vaddr);
+
+ if (type)
+ *type = VM_FAULT_MINOR;
+
+ return page;
+}
+
+
+static struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = {
+ .open = snd_usX2Y_hwdep_pcm_vm_open,
+ .close = snd_usX2Y_hwdep_pcm_vm_close,
+ .nopage = snd_usX2Y_hwdep_pcm_vm_nopage,
+};
+
+
+static int snd_usX2Y_hwdep_pcm_mmap(snd_hwdep_t * hw, struct file *filp, struct vm_area_struct *area)
+{
+ unsigned long size = (unsigned long)(area->vm_end - area->vm_start);
+ usX2Ydev_t *usX2Y = (usX2Ydev_t*)hw->private_data;
+
+ if (!(((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT))
+ return -EBUSY;
+
+ /* if userspace tries to mmap beyond end of our buffer, fail */
+ if (size > PAGE_ALIGN(sizeof(snd_usX2Y_hwdep_pcm_shm_t))) {
+ snd_printd("%lu > %lu\n", size, (unsigned long)sizeof(snd_usX2Y_hwdep_pcm_shm_t));
+ return -EINVAL;
+ }
+
+ if (!usX2Y->hwdep_pcm_shm) {
+ return -ENODEV;
+ }
+ area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops;
+ area->vm_flags |= VM_RESERVED;
+ snd_printd("vm_flags=0x%lX\n", area->vm_flags);
+ area->vm_private_data = hw->private_data;
+ return 0;
+}
+
+
+static void snd_usX2Y_hwdep_pcm_private_free(snd_hwdep_t *hwdep)
+{
+ usX2Ydev_t *usX2Y = (usX2Ydev_t *)hwdep->private_data;
+ if (NULL != usX2Y->hwdep_pcm_shm)
+ snd_free_pages(usX2Y->hwdep_pcm_shm, sizeof(snd_usX2Y_hwdep_pcm_shm_t));
+}
+
+
+static void snd_usX2Y_usbpcm_private_free(snd_pcm_t *pcm)
+{
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+
+int usX2Y_hwdep_pcm_new(snd_card_t* card)
+{
+ int err;
+ snd_hwdep_t *hw;
+ snd_pcm_t *pcm;
+ struct usb_device *dev = usX2Y(card)->chip.dev;
+ if (1 != nr_of_packs())
+ return 0;
+
+ if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0) {
+ snd_printd("\n");
+ 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->private_free = snd_usX2Y_usbpcm_private_free;
+ 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))) {
+ snd_usX2Y_usbpcm_private_free(pcm);
+ return err;
+ }
+
+
+ return 0;
+}
+
+#else
+
+int usX2Y_hwdep_pcm_new(snd_card_t* card)
+{
+ return 0;
+}
+
+#endif
git://git.onelab.eu / linux-2.6.git / blobdiff