[ALSA] Add Native Instrument usb audio device support
Add snd-usb-caiaq driver to support caiaq usb-audio devices from
Native Instrument:
* Native Instruments RigKontrol2
* Native Instruments Kore Controller
* Native Instruments Audio Kontrol 1
* Native Instruments Audio 8 DJ
Signed-off-by: Daniel Mack <daniel@caiaq.org>
Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/usb/caiaq/caiaq-audio.c b/sound/usb/caiaq/caiaq-audio.c
new file mode 100644
index 0000000..e80c8db
--- /dev/null
+++ b/sound/usb/caiaq/caiaq-audio.c
@@ -0,0 +1,706 @@
+/*
+ * Copyright (c) 2006,2007 Daniel Mack, Karsten Wiese
+ *
+ * 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
+*/
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <linux/spinlock.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/rawmidi.h>
+#ifdef CONFIG_SND_USB_CAIAQ_INPUT
+#include <linux/input.h>
+#endif
+
+#include "caiaq-device.h"
+#include "caiaq-audio.h"
+
+#define N_URBS 32
+#define CLOCK_DRIFT_TOLERANCE 5
+#define FRAMES_PER_URB 8
+#define BYTES_PER_FRAME 512
+#define CHANNELS_PER_STREAM 2
+#define BYTES_PER_SAMPLE 3
+#define BYTES_PER_SAMPLE_USB 4
+#define MAX_BUFFER_SIZE (128*1024)
+
+#define ENDPOINT_CAPTURE 2
+#define ENDPOINT_PLAYBACK 6
+
+#define MAKE_CHECKBYTE(dev,stream,i) \
+ (stream << 1) | (~(i / (dev->n_streams * BYTES_PER_SAMPLE_USB)) & 1)
+
+static struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = {
+ .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER),
+ .formats = SNDRV_PCM_FMTBIT_S24_3BE,
+ .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
+ SNDRV_PCM_RATE_96000),
+ .rate_min = 44100,
+ .rate_max = 0, /* will overwrite later */
+ .channels_min = CHANNELS_PER_STREAM,
+ .channels_max = CHANNELS_PER_STREAM,
+ .buffer_bytes_max = MAX_BUFFER_SIZE,
+ .period_bytes_min = 4096,
+ .period_bytes_max = MAX_BUFFER_SIZE,
+ .periods_min = 1,
+ .periods_max = 1024,
+};
+
+static void
+activate_substream(struct snd_usb_caiaqdev *dev,
+ struct snd_pcm_substream *sub)
+{
+ if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dev->sub_playback[sub->number] = sub;
+ else
+ dev->sub_capture[sub->number] = sub;
+}
+
+static void
+deactivate_substream(struct snd_usb_caiaqdev *dev,
+ struct snd_pcm_substream *sub)
+{
+ if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dev->sub_playback[sub->number] = NULL;
+ else
+ dev->sub_capture[sub->number] = NULL;
+}
+
+static int
+all_substreams_zero(struct snd_pcm_substream **subs)
+{
+ int i;
+ for (i = 0; i < MAX_STREAMS; i++)
+ if (subs[i] != NULL)
+ return 0;
+ return 1;
+}
+
+static int stream_start(struct snd_usb_caiaqdev *dev)
+{
+ int i, ret;
+
+ debug("stream_start(%p)\n", dev);
+ spin_lock_irq(&dev->spinlock);
+ if (dev->streaming) {
+ spin_unlock_irq(&dev->spinlock);
+ return -EINVAL;
+ }
+
+ dev->input_panic = 0;
+ dev->output_panic = 0;
+ dev->first_packet = 1;
+ dev->streaming = 1;
+
+ for (i = 0; i < N_URBS; i++) {
+ ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
+ if (ret) {
+ log("unable to trigger initial read #%d! (ret = %d)\n",
+ i, ret);
+ dev->streaming = 0;
+ spin_unlock_irq(&dev->spinlock);
+ return -EPIPE;
+ }
+ }
+
+ spin_unlock_irq(&dev->spinlock);
+ return 0;
+}
+
+static void stream_stop(struct snd_usb_caiaqdev *dev)
+{
+ int i;
+
+ debug("stream_stop(%p)\n", dev);
+ if (!dev->streaming)
+ return;
+
+ dev->streaming = 0;
+ for (i = 0; i < N_URBS; i++) {
+ usb_unlink_urb(dev->data_urbs_in[i]);
+ usb_unlink_urb(dev->data_urbs_out[i]);
+ }
+}
+
+static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
+{
+ struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
+ debug("snd_usb_caiaq_substream_open(%p)\n", substream);
+ substream->runtime->hw = dev->pcm_info;
+ snd_pcm_limit_hw_rates(substream->runtime);
+ return 0;
+}
+
+static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream)
+{
+ struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
+
+ debug("snd_usb_caiaq_substream_close(%p)\n", substream);
+ if (all_substreams_zero(dev->sub_playback) &&
+ all_substreams_zero(dev->sub_capture)) {
+ /* when the last client has stopped streaming,
+ * all sample rates are allowed again */
+ stream_stop(dev);
+ dev->pcm_info.rates = dev->samplerates;
+ }
+
+ return 0;
+}
+
+static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
+ struct snd_pcm_hw_params *hw_params)
+{
+ debug("snd_usb_caiaq_pcm_hw_params(%p)\n", sub);
+ return snd_pcm_lib_malloc_pages(sub, params_buffer_bytes(hw_params));
+}
+
+static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
+{
+ struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
+ debug("snd_usb_caiaq_pcm_hw_free(%p)\n", sub);
+ spin_lock_irq(&dev->spinlock);
+ deactivate_substream(dev, sub);
+ spin_unlock_irq(&dev->spinlock);
+ return snd_pcm_lib_free_pages(sub);
+}
+
+/* this should probably go upstream */
+#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
+#error "Change this table"
+#endif
+
+static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
+ 48000, 64000, 88200, 96000, 176400, 192000 };
+
+static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ int bytes_per_sample, bpp, ret, i;
+ int index = substream->number;
+ struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ debug("snd_usb_caiaq_pcm_prepare(%p)\n", substream);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ dev->audio_out_buf_pos[index] = BYTES_PER_SAMPLE + 1;
+ else
+ dev->audio_in_buf_pos[index] = 0;
+
+ if (dev->streaming)
+ return 0;
+
+ /* the first client that opens a stream defines the sample rate
+ * setting for all subsequent calls, until the last client closed. */
+ for (i=0; i < ARRAY_SIZE(rates); i++)
+ if (runtime->rate == rates[i])
+ dev->pcm_info.rates = 1 << i;
+
+ snd_pcm_limit_hw_rates(runtime);
+
+ bytes_per_sample = BYTES_PER_SAMPLE;
+ if (dev->spec.data_alignment == 2)
+ bytes_per_sample++;
+
+ bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
+ * bytes_per_sample * CHANNELS_PER_STREAM * dev->n_streams;
+
+ ret = snd_usb_caiaq_set_audio_params(dev, runtime->rate,
+ runtime->sample_bits, bpp);
+ if (ret)
+ return ret;
+
+ ret = stream_start(dev);
+ if (ret)
+ return ret;
+
+ dev->output_running = 0;
+ wait_event_timeout(dev->prepare_wait_queue, dev->output_running, HZ);
+ if (!dev->output_running) {
+ stream_stop(dev);
+ return -EPIPE;
+ }
+
+ return 0;
+}
+
+static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
+{
+ struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ spin_lock(&dev->spinlock);
+ activate_substream(dev, sub);
+ spin_unlock(&dev->spinlock);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ spin_lock(&dev->spinlock);
+ deactivate_substream(dev, sub);
+ spin_unlock(&dev->spinlock);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static snd_pcm_uframes_t
+snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
+{
+ int index = sub->number;
+ struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
+
+ if (dev->input_panic || dev->output_panic)
+ return SNDRV_PCM_POS_XRUN;
+
+ if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ return bytes_to_frames(sub->runtime,
+ dev->audio_out_buf_pos[index]);
+ else
+ return bytes_to_frames(sub->runtime,
+ dev->audio_in_buf_pos[index]);
+}
+
+/* operators for both playback and capture */
+static struct snd_pcm_ops snd_usb_caiaq_ops = {
+ .open = snd_usb_caiaq_substream_open,
+ .close = snd_usb_caiaq_substream_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_usb_caiaq_pcm_hw_params,
+ .hw_free = snd_usb_caiaq_pcm_hw_free,
+ .prepare = snd_usb_caiaq_pcm_prepare,
+ .trigger = snd_usb_caiaq_pcm_trigger,
+ .pointer = snd_usb_caiaq_pcm_pointer
+};
+
+static void check_for_elapsed_periods(struct snd_usb_caiaqdev *dev,
+ struct snd_pcm_substream **subs)
+{
+ int stream, pb, *cnt;
+ struct snd_pcm_substream *sub;
+
+ for (stream = 0; stream < dev->n_streams; stream++) {
+ sub = subs[stream];
+ if (!sub)
+ continue;
+
+ pb = frames_to_bytes(sub->runtime,
+ sub->runtime->period_size);
+ cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ &dev->period_out_count[stream] :
+ &dev->period_in_count[stream];
+
+ if (*cnt >= pb) {
+ snd_pcm_period_elapsed(sub);
+ *cnt %= pb;
+ }
+ }
+}
+
+static void read_in_urb_mode0(struct snd_usb_caiaqdev *dev,
+ const struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
+ struct snd_pcm_substream *sub;
+ int stream, i;
+
+ if (all_substreams_zero(dev->sub_capture))
+ return;
+
+ spin_lock(&dev->spinlock);
+
+ for (i = 0; i < iso->actual_length;) {
+ for (stream = 0; stream < dev->n_streams; stream++, i++) {
+ sub = dev->sub_capture[stream];
+ if (sub) {
+ struct snd_pcm_runtime *rt = sub->runtime;
+ char *audio_buf = rt->dma_area;
+ int sz = frames_to_bytes(rt, rt->buffer_size);
+ audio_buf[dev->audio_in_buf_pos[stream]++]
+ = usb_buf[i];
+ dev->period_in_count[stream]++;
+ if (dev->audio_in_buf_pos[stream] == sz)
+ dev->audio_in_buf_pos[stream] = 0;
+ }
+ }
+ }
+
+ spin_unlock(&dev->spinlock);
+}
+
+static void read_in_urb_mode2(struct snd_usb_caiaqdev *dev,
+ const struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
+ unsigned char check_byte;
+ struct snd_pcm_substream *sub;
+ int stream, i;
+
+ spin_lock(&dev->spinlock);
+
+ for (i = 0; i < iso->actual_length;) {
+ if (i % (dev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
+ for (stream = 0;
+ stream < dev->n_streams;
+ stream++, i++) {
+ if (dev->first_packet)
+ continue;
+
+ check_byte = MAKE_CHECKBYTE(dev, stream, i);
+
+ if ((usb_buf[i] & 0x3f) != check_byte)
+ dev->input_panic = 1;
+
+ if (usb_buf[i] & 0x80)
+ dev->output_panic = 1;
+ }
+ }
+ dev->first_packet = 0;
+
+ for (stream = 0; stream < dev->n_streams; stream++, i++) {
+ sub = dev->sub_capture[stream];
+ if (sub) {
+ struct snd_pcm_runtime *rt = sub->runtime;
+ char *audio_buf = rt->dma_area;
+ int sz = frames_to_bytes(rt, rt->buffer_size);
+ audio_buf[dev->audio_in_buf_pos[stream]++]
+ = usb_buf[i];
+ dev->period_in_count[stream]++;
+ if (dev->audio_in_buf_pos[stream] == sz)
+ dev->audio_in_buf_pos[stream] = 0;
+ }
+ }
+ }
+
+ spin_unlock(&dev->spinlock);
+}
+
+static void read_in_urb(struct snd_usb_caiaqdev *dev,
+ const struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ if (!dev->streaming)
+ return;
+
+ switch (dev->spec.data_alignment) {
+ case 0:
+ read_in_urb_mode0(dev, urb, iso);
+ break;
+ case 2:
+ read_in_urb_mode2(dev, urb, iso);
+ break;
+ }
+
+ if (dev->input_panic || dev->output_panic) {
+ debug("streaming error detected %s %s\n",
+ dev->input_panic ? "(input)" : "",
+ dev->output_panic ? "(output)" : "");
+ }
+
+ check_for_elapsed_periods(dev, dev->sub_capture);
+}
+
+static void fill_out_urb(struct snd_usb_caiaqdev *dev,
+ struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
+ struct snd_pcm_substream *sub;
+ int stream, i;
+
+ spin_lock(&dev->spinlock);
+
+ for (i = 0; i < iso->length;) {
+ for (stream = 0; stream < dev->n_streams; stream++) {
+ sub = dev->sub_playback[stream];
+ if (sub) {
+ struct snd_pcm_runtime *rt = sub->runtime;
+ char *audio_buf = rt->dma_area;
+ int sz = frames_to_bytes(rt, rt->buffer_size);
+ usb_buf[i++]
+ = audio_buf[dev->audio_out_buf_pos[stream]++];
+ dev->audio_out_buf_pos[stream]++;
+ if (dev->audio_out_buf_pos[stream] == sz)
+ dev->audio_out_buf_pos[stream] = 0;
+ } else
+ usb_buf[i++] = 0;
+
+ /* fill in the check bytes */
+ if (dev->spec.data_alignment == 2 &&
+ i % (dev->n_streams * BYTES_PER_SAMPLE_USB) ==
+ (dev->n_streams * CHANNELS_PER_STREAM))
+ for (stream = 0; stream < dev->n_streams; stream++, i++)
+ usb_buf[i] = MAKE_CHECKBYTE(dev, stream, i);
+ }
+ }
+
+ spin_unlock(&dev->spinlock);
+ check_for_elapsed_periods(dev, dev->sub_playback);
+}
+
+static void read_completed(struct urb *urb)
+{
+ struct snd_usb_caiaq_cb_info *info = urb->context;
+ struct snd_usb_caiaqdev *dev;
+ struct urb *out;
+ int frame, len, send_it = 0, outframe = 0;
+
+ if (urb->status || !info)
+ return;
+
+ dev = info->dev;
+ if (!dev->streaming)
+ return;
+
+ out = dev->data_urbs_out[info->index];
+
+ /* read the recently received packet and send back one which has
+ * the same layout */
+ for (frame = 0; frame < FRAMES_PER_URB; frame++) {
+ if (urb->iso_frame_desc[frame].status)
+ continue;
+
+ len = urb->iso_frame_desc[outframe].actual_length;
+ out->iso_frame_desc[outframe].length = len;
+ out->iso_frame_desc[outframe].actual_length = 0;
+ out->iso_frame_desc[outframe].offset = BYTES_PER_FRAME * frame;
+
+ if (len > 0) {
+ fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
+ read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
+ send_it = 1;
+ }
+
+ outframe++;
+ }
+
+ if (send_it) {
+ out->number_of_packets = FRAMES_PER_URB;
+ out->transfer_flags = URB_ISO_ASAP;
+ usb_submit_urb(out, GFP_ATOMIC);
+ }
+
+ /* re-submit inbound urb */
+ for (frame = 0; frame < FRAMES_PER_URB; frame++) {
+ urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame;
+ urb->iso_frame_desc[frame].length = BYTES_PER_FRAME;
+ urb->iso_frame_desc[frame].actual_length = 0;
+ }
+
+ urb->number_of_packets = FRAMES_PER_URB;
+ urb->transfer_flags = URB_ISO_ASAP;
+ usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+static void write_completed(struct urb *urb)
+{
+ struct snd_usb_caiaq_cb_info *info = urb->context;
+ struct snd_usb_caiaqdev *dev = info->dev;
+
+ if (!dev->output_running) {
+ dev->output_running = 1;
+ wake_up(&dev->prepare_wait_queue);
+ }
+}
+
+static struct urb **alloc_urbs(struct snd_usb_caiaqdev *dev, int dir, int *ret)
+{
+ int i, frame;
+ struct urb **urbs;
+ struct usb_device *usb_dev = dev->chip.dev;
+ unsigned int pipe;
+
+ pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ?
+ usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) :
+ usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE);
+
+ urbs = kmalloc(N_URBS * sizeof(*urbs), GFP_KERNEL);
+ if (!urbs) {
+ log("unable to kmalloc() urbs, OOM!?\n");
+ *ret = -ENOMEM;
+ return NULL;
+ }
+
+ for (i = 0; i < N_URBS; i++) {
+ urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL);
+ if (!urbs[i]) {
+ log("unable to usb_alloc_urb(), OOM!?\n");
+ *ret = -ENOMEM;
+ return urbs;
+ }
+
+ urbs[i]->transfer_buffer =
+ kmalloc(FRAMES_PER_URB * BYTES_PER_FRAME, GFP_KERNEL);
+ if (!urbs[i]->transfer_buffer) {
+ log("unable to kmalloc() transfer buffer, OOM!?\n");
+ *ret = -ENOMEM;
+ return urbs;
+ }
+
+ for (frame = 0; frame < FRAMES_PER_URB; frame++) {
+ struct usb_iso_packet_descriptor *iso =
+ &urbs[i]->iso_frame_desc[frame];
+
+ iso->offset = BYTES_PER_FRAME * frame;
+ iso->length = BYTES_PER_FRAME;
+ }
+
+ urbs[i]->dev = usb_dev;
+ urbs[i]->pipe = pipe;
+ urbs[i]->transfer_buffer_length = FRAMES_PER_URB
+ * BYTES_PER_FRAME;
+ urbs[i]->context = &dev->data_cb_info[i];
+ urbs[i]->interval = 1;
+ urbs[i]->transfer_flags = URB_ISO_ASAP;
+ urbs[i]->number_of_packets = FRAMES_PER_URB;
+ urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
+ read_completed : write_completed;
+ }
+
+ *ret = 0;
+ return urbs;
+}
+
+static void free_urbs(struct urb **urbs)
+{
+ int i;
+
+ if (!urbs)
+ return;
+
+ for (i = 0; i < N_URBS; i++) {
+ if (!urbs[i])
+ continue;
+
+ usb_kill_urb(urbs[i]);
+ kfree(urbs[i]->transfer_buffer);
+ usb_free_urb(urbs[i]);
+ }
+
+ kfree(urbs);
+}
+
+int __devinit snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
+{
+ int i, ret;
+
+ dev->n_audio_in = max(dev->spec.num_analog_audio_in,
+ dev->spec.num_digital_audio_in) /
+ CHANNELS_PER_STREAM;
+ dev->n_audio_out = max(dev->spec.num_analog_audio_out,
+ dev->spec.num_digital_audio_out) /
+ CHANNELS_PER_STREAM;
+ dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
+
+ debug("dev->n_audio_in = %d\n", dev->n_audio_in);
+ debug("dev->n_audio_out = %d\n", dev->n_audio_out);
+ debug("dev->n_streams = %d\n", dev->n_streams);
+
+ if (dev->n_streams > MAX_STREAMS) {
+ log("unable to initialize device, too many streams.\n");
+ return -EINVAL;
+ }
+
+ ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
+ dev->n_audio_out, dev->n_audio_in, &dev->pcm);
+
+ if (ret < 0) {
+ log("snd_pcm_new() returned %d\n", ret);
+ return ret;
+ }
+
+ dev->pcm->private_data = dev;
+ strcpy(dev->pcm->name, dev->product_name);
+
+ memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
+ memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
+
+ memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
+ sizeof(snd_usb_caiaq_pcm_hardware));
+
+ /* setup samplerates */
+ dev->samplerates = dev->pcm_info.rates;
+ switch (dev->chip.usb_id) {
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
+ dev->samplerates |= SNDRV_PCM_RATE_88200;
+ dev->samplerates |= SNDRV_PCM_RATE_192000;
+ break;
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
+ dev->samplerates |= SNDRV_PCM_RATE_88200;
+ break;
+ }
+
+ snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &snd_usb_caiaq_ops);
+ snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_usb_caiaq_ops);
+
+ snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
+ SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL),
+ MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
+
+ dev->data_cb_info =
+ kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
+ GFP_KERNEL);
+
+ if (!dev->data_cb_info)
+ return -ENOMEM;
+
+ for (i = 0; i < N_URBS; i++) {
+ dev->data_cb_info[i].dev = dev;
+ dev->data_cb_info[i].index = i;
+ }
+
+ dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
+ if (ret < 0) {
+ kfree(dev->data_cb_info);
+ free_urbs(dev->data_urbs_in);
+ return ret;
+ }
+
+ dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
+ if (ret < 0) {
+ kfree(dev->data_cb_info);
+ free_urbs(dev->data_urbs_in);
+ free_urbs(dev->data_urbs_out);
+ return ret;
+ }
+
+ return 0;
+}
+
+void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
+{
+ debug("snd_usb_caiaq_audio_free (%p)\n", dev);
+ stream_stop(dev);
+ free_urbs(dev->data_urbs_in);
+ free_urbs(dev->data_urbs_out);
+ kfree(dev->data_cb_info);
+}
+