--- /dev/null
+/*
+ * Edirol UA-101 driver
+ * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
+ *
+ * This driver is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2.
+ *
+ * This driver 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 driver. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/usb/audio.h>
+#include <linux/vmalloc.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "usbaudio.h"
+
+MODULE_DESCRIPTION("Edirol UA-101 driver");
+MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
+MODULE_LICENSE("GPL v2");
+MODULE_SUPPORTED_DEVICE("{{Edirol,UA-101}}");
+
+/* I use my UA-1A for testing because I don't have a UA-101 ... */
+#define UA1A_HACK
+
+/*
+ * Should not be lower than the minimum scheduling delay of the host
+ * controller. Some Intel controllers need more than one frame; as long as
+ * that driver doesn't tell us about this, use 1.5 frames just to be sure.
+ */
+#define MIN_QUEUE_LENGTH 12
+/* Somewhat random. */
+#define MAX_QUEUE_LENGTH 30
+/*
+ * This magic value optimizes memory usage efficiency for the UA-101's packet
+ * sizes at all sample rates, taking into account the stupid cache pool sizes
+ * that usb_buffer_alloc() uses.
+ */
+#define DEFAULT_QUEUE_LENGTH 21
+
+#define MAX_PACKET_SIZE 672 /* hardware specific */
+#define MAX_MEMORY_BUFFERS DIV_ROUND_UP(MAX_QUEUE_LENGTH, \
+ PAGE_SIZE / MAX_PACKET_SIZE)
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+static unsigned int queue_length = 21;
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "card index");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "enable card");
+module_param(queue_length, uint, 0644);
+MODULE_PARM_DESC(queue_length, "USB queue length in microframes, "
+ __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH));
+
+enum {
+ INTF_PLAYBACK,
+ INTF_CAPTURE,
+ INTF_MIDI,
+
+ INTF_COUNT
+};
+
+/* bits in struct ua101::states */
+enum {
+ USB_CAPTURE_RUNNING,
+ USB_PLAYBACK_RUNNING,
+ ALSA_CAPTURE_OPEN,
+ ALSA_PLAYBACK_OPEN,
+ ALSA_CAPTURE_RUNNING,
+ ALSA_PLAYBACK_RUNNING,
+ CAPTURE_URB_COMPLETED,
+ PLAYBACK_URB_COMPLETED,
+ DISCONNECTED,
+};
+
+struct ua101 {
+ struct usb_device *dev;
+ struct snd_card *card;
+ struct usb_interface *intf[INTF_COUNT];
+ int card_index;
+ struct snd_pcm *pcm;
+ struct list_head midi_list;
+ u64 format_bit;
+ unsigned int rate;
+ unsigned int packets_per_second;
+ spinlock_t lock;
+ struct mutex mutex;
+ unsigned long states;
+
+ /* FIFO to synchronize playback rate to capture rate */
+ unsigned int rate_feedback_start;
+ unsigned int rate_feedback_count;
+ u8 rate_feedback[MAX_QUEUE_LENGTH];
+
+ struct list_head ready_playback_urbs;
+ struct tasklet_struct playback_tasklet;
+ wait_queue_head_t alsa_capture_wait;
+ wait_queue_head_t rate_feedback_wait;
+ wait_queue_head_t alsa_playback_wait;
+ struct ua101_stream {
+ struct snd_pcm_substream *substream;
+ unsigned int usb_pipe;
+ unsigned int channels;
+ unsigned int frame_bytes;
+ unsigned int max_packet_bytes;
+ unsigned int period_pos;
+ unsigned int buffer_pos;
+ unsigned int queue_length;
+ struct ua101_urb {
+ struct urb urb;
+ struct usb_iso_packet_descriptor iso_frame_desc[1];
+ struct list_head ready_list;
+ } *urbs[MAX_QUEUE_LENGTH];
+ struct {
+ unsigned int size;
+ void *addr;
+ dma_addr_t dma;
+ } buffers[MAX_MEMORY_BUFFERS];
+ } capture, playback;
+
+ unsigned int fps[10];
+ unsigned int frame_counter;
+};
+
+static DEFINE_MUTEX(devices_mutex);
+static unsigned int devices_used;
+static struct usb_driver ua101_driver;
+
+static void abort_alsa_playback(struct ua101 *ua);
+static void abort_alsa_capture(struct ua101 *ua);
+
+/* allocate virtual buffer; may be called more than once */
+static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs,
+ size_t size)
+{
+ struct snd_pcm_runtime *runtime = subs->runtime;
+
+ if (runtime->dma_area) {
+ if (runtime->dma_bytes >= size)
+ return 0; /* already large enough */
+ vfree(runtime->dma_area);
+ }
+ runtime->dma_area = vmalloc_user(size);
+ if (!runtime->dma_area)
+ return -ENOMEM;
+ runtime->dma_bytes = size;
+ return 0;
+}
+
+/* free virtual buffer; may be called more than once */
+static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
+{
+ struct snd_pcm_runtime *runtime = subs->runtime;
+
+ vfree(runtime->dma_area);
+ runtime->dma_area = NULL;
+ return 0;
+}
+
+/* get the physical page pointer at the given offset */
+static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
+ unsigned long offset)
+{
+ void *pageptr = subs->runtime->dma_area + offset;
+ return vmalloc_to_page(pageptr);
+}
+
+static const char *usb_error_string(int err)
+{
+ switch (err) {
+ case -ENODEV:
+ return "no device";
+ case -ENOENT:
+ return "endpoint not enabled";
+ case -EPIPE:
+ return "endpoint stalled";
+ case -ENOSPC:
+ return "not enough bandwidth";
+ case -ESHUTDOWN:
+ return "device disabled";
+ case -EHOSTUNREACH:
+ return "device suspended";
+ case -EINVAL:
+ case -EAGAIN:
+ case -EFBIG:
+ case -EMSGSIZE:
+ return "internal error";
+ default:
+ return "unknown error";
+ }
+}
+
+static void abort_usb_capture(struct ua101 *ua)
+{
+ if (test_and_clear_bit(USB_CAPTURE_RUNNING, &ua->states)) {
+ wake_up(&ua->alsa_capture_wait);
+ wake_up(&ua->rate_feedback_wait);
+ }
+}
+
+static void abort_usb_playback(struct ua101 *ua)
+{
+ if (test_and_clear_bit(USB_PLAYBACK_RUNNING, &ua->states))
+ wake_up(&ua->alsa_playback_wait);
+}
+
+static void playback_urb_complete(struct urb *usb_urb)
+{
+ struct ua101_urb *urb = (struct ua101_urb *)usb_urb;
+ struct ua101 *ua = urb->urb.context;
+ unsigned long flags;
+
+ if (unlikely(urb->urb.status == -ENOENT || /* unlinked */
+ urb->urb.status == -ENODEV || /* device removed */
+ urb->urb.status == -ECONNRESET || /* unlinked */
+ urb->urb.status == -ESHUTDOWN)) { /* device disabled */
+ abort_usb_playback(ua);
+ abort_alsa_playback(ua);
+ return;
+ }
+
+ if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) {
+ /* append URB to FIFO */
+ spin_lock_irqsave(&ua->lock, flags);
+ list_add_tail(&urb->ready_list, &ua->ready_playback_urbs);
+ if (ua->rate_feedback_count > 0)
+ tasklet_schedule(&ua->playback_tasklet);
+ ua->playback.substream->runtime->delay -=
+ urb->urb.iso_frame_desc[0].length /
+ ua->playback.frame_bytes;
+ spin_unlock_irqrestore(&ua->lock, flags);
+ }
+}
+
+static void first_playback_urb_complete(struct urb *urb)
+{
+ struct ua101 *ua = urb->context;
+
+ urb->complete = playback_urb_complete;
+ playback_urb_complete(urb);
+
+ set_bit(PLAYBACK_URB_COMPLETED, &ua->states);
+ wake_up(&ua->alsa_playback_wait);
+}
+
+/* copy data from the ALSA ring buffer into the URB buffer */
+static bool copy_playback_data(struct ua101_stream *stream, struct urb *urb,
+ unsigned int frames)
+{
+ struct snd_pcm_runtime *runtime;
+ unsigned int frame_bytes, frames1;
+ const u8 *source;
+
+ runtime = stream->substream->runtime;
+ frame_bytes = stream->frame_bytes;
+ source = runtime->dma_area + stream->buffer_pos * frame_bytes;
+ if (stream->buffer_pos + frames <= runtime->buffer_size) {
+ memcpy(urb->transfer_buffer, source, frames * frame_bytes);
+ } else {
+ /* wrap around at end of ring buffer */
+ frames1 = runtime->buffer_size - stream->buffer_pos;
+ memcpy(urb->transfer_buffer, source, frames1 * frame_bytes);
+ memcpy(urb->transfer_buffer + frames1 * frame_bytes,
+ runtime->dma_area, (frames - frames1) * frame_bytes);
+ }
+
+ stream->buffer_pos += frames;
+ if (stream->buffer_pos >= runtime->buffer_size)
+ stream->buffer_pos -= runtime->buffer_size;
+ stream->period_pos += frames;
+ if (stream->period_pos >= runtime->period_size) {
+ stream->period_pos -= runtime->period_size;
+ return true;
+ }
+ return false;
+}
+
+static inline void add_with_wraparound(struct ua101 *ua,
+ unsigned int *value, unsigned int add)
+{
+ *value += add;
+ if (*value >= ua->playback.queue_length)
+ *value -= ua->playback.queue_length;
+}
+
+static void playback_tasklet(unsigned long data)
+{
+ struct ua101 *ua = (void *)data;
+ unsigned long flags;
+ unsigned int frames;
+ struct ua101_urb *urb;
+ bool do_period_elapsed = false;
+ int err;
+
+ if (unlikely(!test_bit(USB_PLAYBACK_RUNNING, &ua->states)))
+ return;
+
+ /*
+ * Synchronizing the playback rate to the capture rate is done by using
+ * the same sequence of packet sizes for both streams.
+ * Submitting a playback URB therefore requires both a ready URB and
+ * the size of the corresponding capture packet, i.e., both playback
+ * and capture URBs must have been completed. Since the USB core does
+ * not guarantee that playback and capture complete callbacks are
+ * called alternately, we use two FIFOs for packet sizes and read URBs;
+ * submitting playback URBs is possible as long as both FIFOs are
+ * nonempty.
+ */
+ spin_lock_irqsave(&ua->lock, flags);
+ while (ua->rate_feedback_count > 0 &&
+ !list_empty(&ua->ready_playback_urbs)) {
+ /* take packet size out of FIFO */
+ frames = ua->rate_feedback[ua->rate_feedback_start];
+ add_with_wraparound(ua, &ua->rate_feedback_start, 1);
+ ua->rate_feedback_count--;
+
+ /* take URB out of FIFO */
+ urb = list_first_entry(&ua->ready_playback_urbs,
+ struct ua101_urb, ready_list);
+ list_del(&urb->ready_list);
+
+ /* fill packet with data or silence */
+ urb->urb.iso_frame_desc[0].length =
+ frames * ua->playback.frame_bytes;
+ if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
+ do_period_elapsed |= copy_playback_data(&ua->playback,
+ &urb->urb,
+ frames);
+ else
+ memset(urb->urb.transfer_buffer, 0,
+ urb->urb.iso_frame_desc[0].length);
+
+ /* and off you go ... */
+ err = usb_submit_urb(&urb->urb, GFP_ATOMIC);
+ if (unlikely(err < 0)) {
+ spin_unlock_irqrestore(&ua->lock, flags);
+ abort_usb_playback(ua);
+ abort_alsa_playback(ua);
+ dev_err(&ua->dev->dev, "USB request error %d: %s\n",
+ err, usb_error_string(err));
+ return;
+ }
+ ua->playback.substream->runtime->delay += frames;
+ }
+ spin_unlock_irqrestore(&ua->lock, flags);
+ if (do_period_elapsed)
+ snd_pcm_period_elapsed(ua->playback.substream);
+}
+
+/* copy data from the URB buffer into the ALSA ring buffer */
+static bool copy_capture_data(struct ua101_stream *stream, struct urb *urb,
+ unsigned int frames)
+{
+ struct snd_pcm_runtime *runtime;
+ unsigned int frame_bytes, frames1;
+ u8 *dest;
+
+ runtime = stream->substream->runtime;
+ frame_bytes = stream->frame_bytes;
+ dest = runtime->dma_area + stream->buffer_pos * frame_bytes;
+ if (stream->buffer_pos + frames <= runtime->buffer_size) {
+ memcpy(dest, urb->transfer_buffer, frames * frame_bytes);
+ } else {
+ /* wrap around at end of ring buffer */
+ frames1 = runtime->buffer_size - stream->buffer_pos;
+ memcpy(dest, urb->transfer_buffer, frames1 * frame_bytes);
+ memcpy(runtime->dma_area,
+ urb->transfer_buffer + frames1 * frame_bytes,
+ (frames - frames1) * frame_bytes);
+ }
+
+ stream->buffer_pos += frames;
+ if (stream->buffer_pos >= runtime->buffer_size)
+ stream->buffer_pos -= runtime->buffer_size;
+ stream->period_pos += frames;
+ if (stream->period_pos >= runtime->period_size) {
+ stream->period_pos -= runtime->period_size;
+ return true;
+ }
+ return false;
+}
+
+static void capture_urb_complete(struct urb *urb)
+{
+ struct ua101 *ua = urb->context;
+ struct ua101_stream *stream = &ua->capture;
+ unsigned long flags;
+ unsigned int frames, write_ptr;
+ bool do_period_elapsed;
+ int err;
+
+ if (unlikely(urb->status == -ENOENT || /* unlinked */
+ urb->status == -ENODEV || /* device removed */
+ urb->status == -ECONNRESET || /* unlinked */
+ urb->status == -ESHUTDOWN)) /* device disabled */
+ goto stream_stopped;
+
+ if (urb->status >= 0 && urb->iso_frame_desc[0].status >= 0)
+ frames = urb->iso_frame_desc[0].actual_length /
+ stream->frame_bytes;
+ else
+ frames = 0;
+
+ spin_lock_irqsave(&ua->lock, flags);
+
+ if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
+ do_period_elapsed = copy_capture_data(stream, urb, frames);
+ else
+ do_period_elapsed = false;
+
+ if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (unlikely(err < 0)) {
+ spin_unlock_irqrestore(&ua->lock, flags);
+ dev_err(&ua->dev->dev, "USB request error %d: %s\n",
+ err, usb_error_string(err));
+ goto stream_stopped;
+ }
+
+ /* append packet size to FIFO */
+ write_ptr = ua->rate_feedback_start;
+ add_with_wraparound(ua, &write_ptr, ua->rate_feedback_count);
+ ua->rate_feedback[write_ptr] = frames;
+ if (ua->rate_feedback_count < ua->playback.queue_length) {
+ ua->rate_feedback_count++;
+ if (ua->rate_feedback_count ==
+ ua->playback.queue_length)
+ wake_up(&ua->rate_feedback_wait);
+ } else {
+ /*
+ * Ring buffer overflow; this happens when the playback
+ * stream is not running. Throw away the oldest entry,
+ * so that the playback stream, when it starts, sees
+ * the most recent packet sizes.
+ */
+ add_with_wraparound(ua, &ua->rate_feedback_start, 1);
+ }
+ if (test_bit(USB_PLAYBACK_RUNNING, &ua->states) &&
+ !list_empty(&ua->ready_playback_urbs))
+ tasklet_schedule(&ua->playback_tasklet);
+ }
+
+ spin_unlock_irqrestore(&ua->lock, flags);
+
+ if (do_period_elapsed)
+ snd_pcm_period_elapsed(stream->substream);
+
+ /* for debugging: measure the sample rate relative to the USB clock */
+ ua->fps[ua->frame_counter++ / ua->packets_per_second] += frames;
+ if (ua->frame_counter >= ARRAY_SIZE(ua->fps) * ua->packets_per_second) {
+ printk(KERN_DEBUG "capture rate:");
+ for (frames = 0; frames < ARRAY_SIZE(ua->fps); ++frames)
+ printk(KERN_CONT " %u", ua->fps[frames]);
+ printk(KERN_CONT "\n");
+ memset(ua->fps, 0, sizeof(ua->fps));
+ ua->frame_counter = 0;
+ }
+ return;
+
+stream_stopped:
+ abort_usb_playback(ua);
+ abort_usb_capture(ua);
+ abort_alsa_playback(ua);
+ abort_alsa_capture(ua);
+}
+
+static void first_capture_urb_complete(struct urb *urb)
+{
+ struct ua101 *ua = urb->context;
+
+ urb->complete = capture_urb_complete;
+ capture_urb_complete(urb);
+
+ set_bit(CAPTURE_URB_COMPLETED, &ua->states);
+ wake_up(&ua->alsa_capture_wait);
+}
+
+static int submit_stream_urbs(struct ua101 *ua, struct ua101_stream *stream)
+{
+ unsigned int i;
+
+ for (i = 0; i < stream->queue_length; ++i) {
+ int err = usb_submit_urb(&stream->urbs[i]->urb, GFP_KERNEL);
+ if (err < 0) {
+ dev_err(&ua->dev->dev, "USB request error %d: %s\n",
+ err, usb_error_string(err));
+ return err;
+ }
+ }
+ return 0;
+}
+
+static void kill_stream_urbs(struct ua101_stream *stream)
+{
+ unsigned int i;
+
+ for (i = 0; i < stream->queue_length; ++i)
+ usb_kill_urb(&stream->urbs[i]->urb);
+}
+
+static int enable_iso_interface(struct ua101 *ua, unsigned int intf_index)
+{
+ struct usb_host_interface *alts;
+
+ alts = ua->intf[intf_index]->cur_altsetting;
+ if (alts->desc.bAlternateSetting != 1) {
+ int err = usb_set_interface(ua->dev,
+ alts->desc.bInterfaceNumber, 1);
+ if (err < 0) {
+ dev_err(&ua->dev->dev,
+ "cannot initialize interface; error %d: %s\n",
+ err, usb_error_string(err));
+ return err;
+ }
+ }
+ return 0;
+}
+
+static void disable_iso_interface(struct ua101 *ua, unsigned int intf_index)
+{
+ struct usb_host_interface *alts;
+
+ alts = ua->intf[intf_index]->cur_altsetting;
+ if (alts->desc.bAlternateSetting != 0) {
+ int err = usb_set_interface(ua->dev,
+ alts->desc.bInterfaceNumber, 0);
+ if (err < 0 && !test_bit(DISCONNECTED, &ua->states))
+ dev_warn(&ua->dev->dev,
+ "interface reset failed; error %d: %s\n",
+ err, usb_error_string(err));
+ }
+}
+
+static void stop_usb_capture(struct ua101 *ua)
+{
+ clear_bit(USB_CAPTURE_RUNNING, &ua->states);
+
+ kill_stream_urbs(&ua->capture);
+
+ disable_iso_interface(ua, INTF_CAPTURE);
+}
+
+static int start_usb_capture(struct ua101 *ua)
+{
+ int err;
+
+ if (test_bit(DISCONNECTED, &ua->states))
+ return -ENODEV;
+
+ if (test_bit(USB_CAPTURE_RUNNING, &ua->states))
+ return 0;
+
+ kill_stream_urbs(&ua->capture);
+
+ err = enable_iso_interface(ua, INTF_CAPTURE);
+ if (err < 0)
+ return err;
+
+ clear_bit(CAPTURE_URB_COMPLETED, &ua->states);
+ ua->capture.urbs[0]->urb.complete = first_capture_urb_complete;
+ ua->rate_feedback_start = 0;
+ ua->rate_feedback_count = 0;
+
+ set_bit(USB_CAPTURE_RUNNING, &ua->states);
+ err = submit_stream_urbs(ua, &ua->capture);
+ if (err < 0)
+ stop_usb_capture(ua);
+ return err;
+}
+
+static void stop_usb_playback(struct ua101 *ua)
+{
+ clear_bit(USB_PLAYBACK_RUNNING, &ua->states);
+
+ kill_stream_urbs(&ua->playback);
+
+ tasklet_kill(&ua->playback_tasklet);
+
+ disable_iso_interface(ua, INTF_PLAYBACK);
+}
+
+static int start_usb_playback(struct ua101 *ua)
+{
+ unsigned int i, frames;
+ struct urb *urb;
+ int err = 0;
+
+ if (test_bit(DISCONNECTED, &ua->states))
+ return -ENODEV;
+
+ if (test_bit(USB_PLAYBACK_RUNNING, &ua->states))
+ return 0;
+
+ kill_stream_urbs(&ua->playback);
+ tasklet_kill(&ua->playback_tasklet);
+
+ err = enable_iso_interface(ua, INTF_PLAYBACK);
+ if (err < 0)
+ return err;
+
+ clear_bit(PLAYBACK_URB_COMPLETED, &ua->states);
+ ua->playback.urbs[0]->urb.complete =
+ first_playback_urb_complete;
+ spin_lock_irq(&ua->lock);
+ INIT_LIST_HEAD(&ua->ready_playback_urbs);
+ spin_unlock_irq(&ua->lock);
+
+ /*
+ * We submit the initial URBs all at once, so we have to wait for the
+ * packet size FIFO to be full.
+ */
+ wait_event(ua->rate_feedback_wait,
+ ua->rate_feedback_count >= ua->playback.queue_length ||
+ !test_bit(USB_CAPTURE_RUNNING, &ua->states) ||
+ test_bit(DISCONNECTED, &ua->states));
+ if (test_bit(DISCONNECTED, &ua->states)) {
+ stop_usb_playback(ua);
+ return -ENODEV;
+ }
+ if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
+ stop_usb_playback(ua);
+ return -EIO;
+ }
+
+ for (i = 0; i < ua->playback.queue_length; ++i) {
+ /* all initial URBs contain silence */
+ spin_lock_irq(&ua->lock);
+ frames = ua->rate_feedback[ua->rate_feedback_start];
+ add_with_wraparound(ua, &ua->rate_feedback_start, 1);
+ ua->rate_feedback_count--;
+ spin_unlock_irq(&ua->lock);
+ urb = &ua->playback.urbs[i]->urb;
+ urb->iso_frame_desc[0].length =
+ frames * ua->playback.frame_bytes;
+ memset(urb->transfer_buffer, 0,
+ urb->iso_frame_desc[0].length);
+ }
+
+ set_bit(USB_PLAYBACK_RUNNING, &ua->states);
+ err = submit_stream_urbs(ua, &ua->playback);
+ if (err < 0)
+ stop_usb_playback(ua);
+ return err;
+}
+
+static void abort_alsa_capture(struct ua101 *ua)
+{
+ if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
+ snd_pcm_stop(ua->capture.substream, SNDRV_PCM_STATE_XRUN);
+}
+
+static void abort_alsa_playback(struct ua101 *ua)
+{
+ if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
+ snd_pcm_stop(ua->playback.substream, SNDRV_PCM_STATE_XRUN);
+}
+
+static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream,
+ unsigned int channels)
+{
+ int err;
+
+ substream->runtime->hw.info =
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_BATCH |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_FIFO_IN_FRAMES;
+ substream->runtime->hw.formats = ua->format_bit;
+ substream->runtime->hw.rates = snd_pcm_rate_to_rate_bit(ua->rate);
+ substream->runtime->hw.rate_min = ua->rate;
+ substream->runtime->hw.rate_max = ua->rate;
+ substream->runtime->hw.channels_min = channels;
+ substream->runtime->hw.channels_max = channels;
+ substream->runtime->hw.buffer_bytes_max = 45000 * 1024;
+ substream->runtime->hw.period_bytes_min = 1;
+ substream->runtime->hw.period_bytes_max = UINT_MAX;
+ substream->runtime->hw.periods_min = 2;
+ substream->runtime->hw.periods_max = UINT_MAX;
+ err = snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_PERIOD_TIME,
+ 1500000 / ua->packets_per_second,
+ 8192000);
+ if (err < 0)
+ return err;
+ err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
+ return err;
+}
+
+static int capture_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct ua101 *ua = substream->private_data;
+ int err;
+
+ ua->capture.substream = substream;
+ err = set_stream_hw(ua, substream, ua->capture.channels);
+ if (err < 0)
+ return err;
+ substream->runtime->hw.fifo_size =
+ DIV_ROUND_CLOSEST(ua->rate, ua->packets_per_second);
+ substream->runtime->delay = substream->runtime->hw.fifo_size;
+
+ mutex_lock(&ua->mutex);
+ err = start_usb_capture(ua);
+ if (err >= 0)
+ set_bit(ALSA_CAPTURE_OPEN, &ua->states);
+ mutex_unlock(&ua->mutex);
+ return err;
+}
+
+static int playback_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct ua101 *ua = substream->private_data;
+ int err;
+
+ ua->playback.substream = substream;
+ err = set_stream_hw(ua, substream, ua->playback.channels);
+ if (err < 0)
+ return err;
+ substream->runtime->hw.fifo_size =
+ DIV_ROUND_CLOSEST(ua->rate * ua->playback.queue_length,
+ ua->packets_per_second);
+
+ mutex_lock(&ua->mutex);
+ err = start_usb_capture(ua);
+ if (err < 0)
+ goto error;
+ err = start_usb_playback(ua);
+ if (err < 0) {
+ if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
+ stop_usb_capture(ua);
+ goto error;
+ }
+ set_bit(ALSA_PLAYBACK_OPEN, &ua->states);
+error:
+ mutex_unlock(&ua->mutex);
+ return err;
+}
+
+static int capture_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct ua101 *ua = substream->private_data;
+
+ mutex_lock(&ua->mutex);
+ clear_bit(ALSA_CAPTURE_OPEN, &ua->states);
+ if (!test_bit(ALSA_PLAYBACK_OPEN, &ua->states))
+ stop_usb_capture(ua);
+ mutex_unlock(&ua->mutex);
+ return 0;
+}
+
+static int playback_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct ua101 *ua = substream->private_data;
+
+ mutex_lock(&ua->mutex);
+ stop_usb_playback(ua);
+ clear_bit(ALSA_PLAYBACK_OPEN, &ua->states);
+ if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states))
+ stop_usb_capture(ua);
+ mutex_unlock(&ua->mutex);
+ return 0;
+}
+
+static int capture_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct ua101 *ua = substream->private_data;
+ int err;
+
+ mutex_lock(&ua->mutex);
+ err = start_usb_capture(ua);
+ mutex_unlock(&ua->mutex);
+ if (err < 0)
+ return err;
+
+ return snd_pcm_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(hw_params));
+}
+
+static int playback_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct ua101 *ua = substream->private_data;
+ int err;
+
+ mutex_lock(&ua->mutex);
+ err = start_usb_capture(ua);
+ if (err >= 0)
+ err = start_usb_playback(ua);
+ mutex_unlock(&ua->mutex);
+ if (err < 0)
+ return err;
+
+ return snd_pcm_alloc_vmalloc_buffer(substream,
+ params_buffer_bytes(hw_params));
+}
+
+static int ua101_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ snd_pcm_free_vmalloc_buffer(substream);
+ return 0;
+}
+
+static int capture_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct ua101 *ua = substream->private_data;
+ int err;
+
+ mutex_lock(&ua->mutex);
+ err = start_usb_capture(ua);
+ mutex_unlock(&ua->mutex);
+ if (err < 0)
+ return err;
+
+ /*
+ * The EHCI driver schedules the first packet of an iso stream at 10 ms
+ * in the future, i.e., no data is actually captured for that long.
+ * Take the wait here so that the stream is known to be actually
+ * running when the start trigger has been called.
+ */
+ wait_event(ua->alsa_capture_wait,
+ test_bit(CAPTURE_URB_COMPLETED, &ua->states) ||
+ !test_bit(USB_CAPTURE_RUNNING, &ua->states));
+ if (test_bit(DISCONNECTED, &ua->states))
+ return -ENODEV;
+ if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
+ return -EIO;
+
+ ua->capture.period_pos = 0;
+ ua->capture.buffer_pos = 0;
+ return 0;
+}
+
+static int playback_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct ua101 *ua = substream->private_data;
+ int err;
+
+ mutex_lock(&ua->mutex);
+ err = start_usb_capture(ua);
+ if (err >= 0)
+ err = start_usb_playback(ua);
+ mutex_unlock(&ua->mutex);
+ if (err < 0)
+ return err;
+
+ /* see the comment in capture_pcm_prepare() */
+ wait_event(ua->alsa_playback_wait,
+ test_bit(PLAYBACK_URB_COMPLETED, &ua->states) ||
+ !test_bit(USB_PLAYBACK_RUNNING, &ua->states));
+ if (test_bit(DISCONNECTED, &ua->states))
+ return -ENODEV;
+ if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states))
+ return -EIO;
+
+ substream->runtime->delay = 0;
+ ua->playback.period_pos = 0;
+ ua->playback.buffer_pos = 0;
+ return 0;
+}
+
+static int capture_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct ua101 *ua = substream->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ if (!test_bit(USB_CAPTURE_RUNNING, &ua->states))
+ return -EIO;
+ set_bit(ALSA_CAPTURE_RUNNING, &ua->states);
+ return 0;
+ case SNDRV_PCM_TRIGGER_STOP:
+ clear_bit(ALSA_CAPTURE_RUNNING, &ua->states);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int playback_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct ua101 *ua = substream->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states))
+ return -EIO;
+ set_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
+ return 0;
+ case SNDRV_PCM_TRIGGER_STOP:
+ clear_bit(ALSA_PLAYBACK_RUNNING, &ua->states);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static inline snd_pcm_uframes_t ua101_pcm_pointer(struct ua101 *ua,
+ struct ua101_stream *stream)
+{
+ unsigned long flags;
+ unsigned int pos;
+
+ spin_lock_irqsave(&ua->lock, flags);
+ pos = stream->buffer_pos;
+ spin_unlock_irqrestore(&ua->lock, flags);
+ return pos;
+}
+
+static snd_pcm_uframes_t capture_pcm_pointer(struct snd_pcm_substream *subs)
+{
+ struct ua101 *ua = subs->private_data;
+
+ return ua101_pcm_pointer(ua, &ua->capture);
+}
+
+static snd_pcm_uframes_t playback_pcm_pointer(struct snd_pcm_substream *subs)
+{
+ struct ua101 *ua = subs->private_data;
+
+ return ua101_pcm_pointer(ua, &ua->playback);
+}
+
+static struct snd_pcm_ops capture_pcm_ops = {
+ .open = capture_pcm_open,
+ .close = capture_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = capture_pcm_hw_params,
+ .hw_free = ua101_pcm_hw_free,
+ .prepare = capture_pcm_prepare,
+ .trigger = capture_pcm_trigger,
+ .pointer = capture_pcm_pointer,
+ .page = snd_pcm_get_vmalloc_page,
+};
+
+static struct snd_pcm_ops playback_pcm_ops = {
+ .open = playback_pcm_open,
+ .close = playback_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = playback_pcm_hw_params,
+ .hw_free = ua101_pcm_hw_free,
+ .prepare = playback_pcm_prepare,
+ .trigger = playback_pcm_trigger,
+ .pointer = playback_pcm_pointer,
+ .page = snd_pcm_get_vmalloc_page,
+};
+
+static const struct uac_format_type_i_discrete_descriptor *
+find_format_descriptor(struct usb_interface *interface)
+{
+ struct usb_host_interface *alt;
+ u8 *extra;
+ int extralen;
+
+ if (interface->num_altsetting != 2) {
+ dev_err(&interface->dev, "invalid num_altsetting\n");
+ return NULL;
+ }
+
+ alt = &interface->altsetting[0];
+ if (alt->desc.bNumEndpoints != 0) {
+ dev_err(&interface->dev, "invalid bNumEndpoints\n");
+ return NULL;
+ }
+
+ alt = &interface->altsetting[1];
+ if (alt->desc.bNumEndpoints != 1) {
+ dev_err(&interface->dev, "invalid bNumEndpoints\n");
+ return NULL;
+ }
+
+ extra = alt->extra;
+ extralen = alt->extralen;
+ while (extralen >= sizeof(struct usb_descriptor_header)) {
+ struct uac_format_type_i_discrete_descriptor *desc;
+
+ desc = (struct uac_format_type_i_discrete_descriptor *)extra;
+ if (desc->bLength > extralen) {
+ dev_err(&interface->dev, "descriptor overflow\n");
+ return NULL;
+ }
+ if (desc->bLength == UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1) &&
+ desc->bDescriptorType == USB_DT_CS_INTERFACE &&
+ desc->bDescriptorSubtype == UAC_FORMAT_TYPE) {
+ if (desc->bFormatType != UAC_FORMAT_TYPE_I_PCM ||
+ desc->bSamFreqType != 1) {
+ dev_err(&interface->dev,
+ "invalid format type\n");
+ return NULL;
+ }
+ return desc;
+ }
+ extralen -= desc->bLength;
+ extra += desc->bLength;
+ }
+ dev_err(&interface->dev, "sample format descriptor not found\n");
+ return NULL;
+}
+
+static int detect_usb_format(struct ua101 *ua)
+{
+ const struct uac_format_type_i_discrete_descriptor *fmt_capture;
+ const struct uac_format_type_i_discrete_descriptor *fmt_playback;
+ const struct usb_endpoint_descriptor *epd;
+ unsigned int rate2;
+
+ fmt_capture = find_format_descriptor(ua->intf[INTF_CAPTURE]);
+ fmt_playback = find_format_descriptor(ua->intf[INTF_PLAYBACK]);
+ if (!fmt_capture || !fmt_playback)
+ return -ENXIO;
+
+ switch (fmt_capture->bSubframeSize) {
+ case 3:
+ ua->format_bit = SNDRV_PCM_FMTBIT_S24_3LE;
+ break;
+ case 4:
+ ua->format_bit = SNDRV_PCM_FMTBIT_S32_LE;
+ break;
+ default:
+ dev_err(&ua->dev->dev, "sample width is not 24 or 32 bits\n");
+ return -ENXIO;
+ }
+ if (fmt_capture->bSubframeSize != fmt_playback->bSubframeSize) {
+ dev_err(&ua->dev->dev,
+ "playback/capture sample widths do not match\n");
+ return -ENXIO;
+ }
+
+ if (fmt_capture->bBitResolution != 24 ||
+ fmt_playback->bBitResolution != 24) {
+ dev_err(&ua->dev->dev, "sample width is not 24 bits\n");
+ return -ENXIO;
+ }
+
+ ua->rate = combine_triple(fmt_capture->tSamFreq[0]);
+ rate2 = combine_triple(fmt_playback->tSamFreq[0]);
+ if (ua->rate != rate2) {
+ dev_err(&ua->dev->dev,
+ "playback/capture rates do not match: %u/%u\n",
+ rate2, ua->rate);
+ return -ENXIO;
+ }
+
+ switch (ua->dev->speed) {
+ case USB_SPEED_FULL:
+ ua->packets_per_second = 1000;
+ break;
+ case USB_SPEED_HIGH:
+ ua->packets_per_second = 8000;
+ break;
+ default:
+ dev_err(&ua->dev->dev, "unknown device speed\n");
+ return -ENXIO;
+ }
+
+ ua->capture.channels = fmt_capture->bNrChannels;
+ ua->playback.channels = fmt_playback->bNrChannels;
+ ua->capture.frame_bytes =
+ fmt_capture->bSubframeSize * ua->capture.channels;
+ ua->playback.frame_bytes =
+ fmt_playback->bSubframeSize * ua->playback.channels;
+
+ epd = &ua->intf[INTF_CAPTURE]->altsetting[1].endpoint[0].desc;
+ if (!usb_endpoint_is_isoc_in(epd)) {
+ dev_err(&ua->dev->dev, "invalid capture endpoint\n");
+ return -ENXIO;
+ }
+ ua->capture.usb_pipe = usb_rcvisocpipe(ua->dev, usb_endpoint_num(epd));
+ ua->capture.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize);
+
+ epd = &ua->intf[INTF_PLAYBACK]->altsetting[1].endpoint[0].desc;
+ if (!usb_endpoint_is_isoc_out(epd)) {
+ dev_err(&ua->dev->dev, "invalid playback endpoint\n");
+ return -ENXIO;
+ }
+ ua->playback.usb_pipe = usb_sndisocpipe(ua->dev, usb_endpoint_num(epd));
+ ua->playback.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize);
+ return 0;
+}
+
+static int alloc_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
+{
+ unsigned int remaining_packets, packets, packets_per_page, i;
+ size_t size;
+
+ stream->queue_length = queue_length;
+ stream->queue_length = max(stream->queue_length,
+ (unsigned int)MIN_QUEUE_LENGTH);
+ stream->queue_length = min(stream->queue_length,
+ (unsigned int)MAX_QUEUE_LENGTH);
+
+ /*
+ * The cache pool sizes used by usb_buffer_alloc() (128, 512, 2048) are
+ * quite bad when used with the packet sizes of this device (e.g. 280,
+ * 520, 624). Therefore, we allocate and subdivide entire pages, using
+ * a smaller buffer only for the last chunk.
+ */
+ remaining_packets = stream->queue_length;
+ packets_per_page = PAGE_SIZE / stream->max_packet_bytes;
+ for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) {
+ packets = min(remaining_packets, packets_per_page);
+ size = packets * stream->max_packet_bytes;
+ stream->buffers[i].addr =
+ usb_buffer_alloc(ua->dev, size, GFP_KERNEL,
+ &stream->buffers[i].dma);
+ if (!stream->buffers[i].addr)
+ return -ENOMEM;
+ stream->buffers[i].size = size;
+ remaining_packets -= packets;
+ if (!remaining_packets)
+ break;
+ }
+ if (remaining_packets) {
+ dev_err(&ua->dev->dev, "too many packets\n");
+ return -ENXIO;
+ }
+ return 0;
+}
+
+static void free_stream_buffers(struct ua101 *ua, struct ua101_stream *stream)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i)
+ usb_buffer_free(ua->dev,
+ stream->buffers[i].size,
+ stream->buffers[i].addr,
+ stream->buffers[i].dma);
+}
+
+static int alloc_stream_urbs(struct ua101 *ua, struct ua101_stream *stream,
+ void (*urb_complete)(struct urb *))
+{
+ unsigned max_packet_size = stream->max_packet_bytes;
+ struct ua101_urb *urb;
+ unsigned int b, u = 0;
+
+ for (b = 0; b < ARRAY_SIZE(stream->buffers); ++b) {
+ unsigned int size = stream->buffers[b].size;
+ u8 *addr = stream->buffers[b].addr;
+ dma_addr_t dma = stream->buffers[b].dma;
+
+ while (size >= max_packet_size) {
+ if (u >= stream->queue_length)
+ goto bufsize_error;
+ urb = kmalloc(sizeof(*urb), GFP_KERNEL);
+ if (!urb)
+ return -ENOMEM;
+ usb_init_urb(&urb->urb);
+ urb->urb.dev = ua->dev;
+ urb->urb.pipe = stream->usb_pipe;
+ urb->urb.transfer_flags = URB_ISO_ASAP |
+ URB_NO_TRANSFER_DMA_MAP;
+ urb->urb.transfer_buffer = addr;
+ urb->urb.transfer_dma = dma;
+ urb->urb.transfer_buffer_length = max_packet_size;
+ urb->urb.number_of_packets = 1;
+ urb->urb.interval = 1;
+ urb->urb.context = ua;
+ urb->urb.complete = urb_complete;
+ urb->urb.iso_frame_desc[0].offset = 0;
+ urb->urb.iso_frame_desc[0].length = max_packet_size;
+ stream->urbs[u++] = urb;
+ size -= max_packet_size;
+ addr += max_packet_size;
+ dma += max_packet_size;
+ }
+ }
+ if (u == stream->queue_length)
+ return 0;
+bufsize_error:
+ dev_err(&ua->dev->dev, "internal buffer size error\n");
+ return -ENXIO;
+}
+
+static void free_stream_urbs(struct ua101_stream *stream)
+{
+ unsigned int i;
+
+ for (i = 0; i < stream->queue_length; ++i)
+ kfree(stream->urbs[i]);
+}
+
+static void free_usb_related_resources(struct ua101 *ua,
+ struct usb_interface *interface)
+{
+ unsigned int i;
+
+ free_stream_urbs(&ua->capture);
+ free_stream_urbs(&ua->playback);
+ free_stream_buffers(ua, &ua->capture);
+ free_stream_buffers(ua, &ua->playback);
+
+ for (i = 0; i < ARRAY_SIZE(ua->intf); ++i)
+ if (ua->intf[i]) {
+ usb_set_intfdata(ua->intf[i], NULL);
+ if (ua->intf[i] != interface)
+ usb_driver_release_interface(&ua101_driver,
+ ua->intf[i]);
+ }
+}
+
+static void ua101_card_free(struct snd_card *card)
+{
+ struct ua101 *ua = card->private_data;
+
+ mutex_destroy(&ua->mutex);
+}
+
+static int ua101_probe(struct usb_interface *interface,
+ const struct usb_device_id *usb_id)
+{
+ static const struct snd_usb_midi_endpoint_info midi_ep = {
+ .out_cables = 0x0001,
+ .in_cables = 0x0001
+ };
+ static const struct snd_usb_audio_quirk midi_quirk = {
+ .type = QUIRK_MIDI_FIXED_ENDPOINT,
+ .data = &midi_ep
+ };
+ struct snd_card *card;
+ struct ua101 *ua;
+ unsigned int card_index, i;
+ char usb_path[32];
+ int err;
+
+ if (interface->altsetting->desc.bInterfaceNumber != 0)
+ return -ENODEV;
+
+ mutex_lock(&devices_mutex);
+
+ for (card_index = 0; card_index < SNDRV_CARDS; ++card_index)
+ if (enable[card_index] && !(devices_used & (1 << card_index)))
+ break;
+ if (card_index >= SNDRV_CARDS) {
+ mutex_unlock(&devices_mutex);
+ return -ENOENT;
+ }
+ err = snd_card_create(index[card_index], id[card_index], THIS_MODULE,
+ sizeof(*ua), &card);
+ if (err < 0) {
+ mutex_unlock(&devices_mutex);
+ return err;
+ }
+ card->private_free = ua101_card_free;
+ ua = card->private_data;
+ ua->dev = interface_to_usbdev(interface);
+ ua->card = card;
+ ua->card_index = card_index;
+ INIT_LIST_HEAD(&ua->midi_list);
+ spin_lock_init(&ua->lock);
+ mutex_init(&ua->mutex);
+ INIT_LIST_HEAD(&ua->ready_playback_urbs);
+ tasklet_init(&ua->playback_tasklet,
+ playback_tasklet, (unsigned long)ua);
+ init_waitqueue_head(&ua->alsa_capture_wait);
+ init_waitqueue_head(&ua->rate_feedback_wait);
+ init_waitqueue_head(&ua->alsa_playback_wait);
+
+#ifdef UA1A_HACK
+ if (ua->dev->descriptor.idProduct == cpu_to_le16(0x0018)) {
+ ua->intf[2] = interface;
+ ua->intf[0] = usb_ifnum_to_if(ua->dev, 1);
+ ua->intf[1] = usb_ifnum_to_if(ua->dev, 2);
+ usb_driver_claim_interface(&ua101_driver, ua->intf[0], ua);
+ usb_driver_claim_interface(&ua101_driver, ua->intf[1], ua);
+ } else {
+#endif
+ ua->intf[0] = interface;
+ for (i = 1; i < ARRAY_SIZE(ua->intf); ++i) {
+ ua->intf[i] = usb_ifnum_to_if(ua->dev, i);
+ if (!ua->intf[i]) {
+ dev_err(&ua->dev->dev, "interface %u not found\n", i);
+ err = -ENXIO;
+ goto probe_error;
+ }
+ err = usb_driver_claim_interface(&ua101_driver,
+ ua->intf[i], ua);
+ if (err < 0) {
+ ua->intf[i] = NULL;
+ err = -EBUSY;
+ goto probe_error;
+ }
+ }
+#ifdef UA1A_HACK
+ }
+#endif
+
+ snd_card_set_dev(card, &interface->dev);
+
+#ifdef UA1A_HACK
+ if (ua->dev->descriptor.idProduct == cpu_to_le16(0x0018)) {
+ ua->format_bit = SNDRV_PCM_FMTBIT_S16_LE;
+ ua->rate = 44100;
+ ua->packets_per_second = 1000;
+ ua->capture.channels = 2;
+ ua->playback.channels = 2;
+ ua->capture.frame_bytes = 4;
+ ua->playback.frame_bytes = 4;
+ ua->capture.usb_pipe = usb_rcvisocpipe(ua->dev, 2);
+ ua->playback.usb_pipe = usb_sndisocpipe(ua->dev, 1);
+ ua->capture.max_packet_bytes = 192;
+ ua->playback.max_packet_bytes = 192;
+ } else {
+#endif
+ err = detect_usb_format(ua);
+ if (err < 0)
+ goto probe_error;
+#ifdef UA1A_HACK
+ }
+#endif
+
+ strcpy(card->driver, "UA-101");
+ strcpy(card->shortname, "UA-101");
+ usb_make_path(ua->dev, usb_path, sizeof(usb_path));
+ snprintf(ua->card->longname, sizeof(ua->card->longname),
+ "EDIROL UA-101 (serial %s), %u Hz at %s, %s speed",
+ ua->dev->serial ? ua->dev->serial : "?", ua->rate, usb_path,
+ ua->dev->speed == USB_SPEED_HIGH ? "high" : "full");
+
+ err = alloc_stream_buffers(ua, &ua->capture);
+ if (err < 0)
+ goto probe_error;
+ err = alloc_stream_buffers(ua, &ua->playback);
+ if (err < 0)
+ goto probe_error;
+
+ err = alloc_stream_urbs(ua, &ua->capture, capture_urb_complete);
+ if (err < 0)
+ goto probe_error;
+ err = alloc_stream_urbs(ua, &ua->playback, playback_urb_complete);
+ if (err < 0)
+ goto probe_error;
+
+ err = snd_pcm_new(card, "UA-101", 0, 1, 1, &ua->pcm);
+ if (err < 0)
+ goto probe_error;
+ ua->pcm->private_data = ua;
+ strcpy(ua->pcm->name, "UA-101");
+ snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_pcm_ops);
+ snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_pcm_ops);
+
+#ifdef UA1A_HACK
+ if (ua->dev->descriptor.idProduct != cpu_to_le16(0x0018)) {
+#endif
+ err = snd_usbmidi_create(card, ua->intf[INTF_MIDI],
+ &ua->midi_list, &midi_quirk);
+ if (err < 0)
+ goto probe_error;
+#ifdef UA1A_HACK
+ }
+#endif
+
+ err = snd_card_register(card);
+ if (err < 0)
+ goto probe_error;
+
+ usb_set_intfdata(interface, ua);
+ devices_used |= 1 << card_index;
+
+ mutex_unlock(&devices_mutex);
+ return 0;
+
+probe_error:
+ free_usb_related_resources(ua, interface);
+ snd_card_free(card);
+ mutex_unlock(&devices_mutex);
+ return err;
+}
+
+static void ua101_disconnect(struct usb_interface *interface)
+{
+ struct ua101 *ua = usb_get_intfdata(interface);
+ struct list_head *midi;
+
+ if (!ua)
+ return;
+
+ mutex_lock(&devices_mutex);
+
+ set_bit(DISCONNECTED, &ua->states);
+ wake_up(&ua->rate_feedback_wait);
+
+ /* make sure that userspace cannot create new requests */
+ snd_card_disconnect(ua->card);
+
+ /* make sure that there are no pending USB requests */
+ __list_for_each(midi, &ua->midi_list)
+ snd_usbmidi_disconnect(midi);
+ abort_alsa_playback(ua);
+ abort_alsa_capture(ua);
+ mutex_lock(&ua->mutex);
+ stop_usb_playback(ua);
+ stop_usb_capture(ua);
+ mutex_unlock(&ua->mutex);
+
+ free_usb_related_resources(ua, interface);
+
+ devices_used &= ~(1 << ua->card_index);
+
+ snd_card_free_when_closed(ua->card);
+
+ mutex_unlock(&devices_mutex);
+}
+
+static struct usb_device_id ua101_ids[] = {
+#ifdef UA1A_HACK
+ { USB_DEVICE(0x0582, 0x0018) },
+#endif
+ { USB_DEVICE(0x0582, 0x007d) },
+ { USB_DEVICE(0x0582, 0x008d) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, ua101_ids);
+
+static struct usb_driver ua101_driver = {
+ .name = "snd-ua101",
+ .id_table = ua101_ids,
+ .probe = ua101_probe,
+ .disconnect = ua101_disconnect,
+#if 0
+ .suspend = ua101_suspend,
+ .resume = ua101_resume,
+#endif
+};
+
+static int __init alsa_card_ua101_init(void)
+{
+ return usb_register(&ua101_driver);
+}
+
+static void __exit alsa_card_ua101_exit(void)
+{
+ usb_deregister(&ua101_driver);
+ mutex_destroy(&devices_mutex);
+}
+
+module_init(alsa_card_ua101_init);
+module_exit(alsa_card_ua101_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff