--- /dev/null
+/*
+ * Copyright (c) 2006-2008 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 <linux/device.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include "device.h"
+#include "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 MAX_ENDPOINT_SIZE 512
+
+#define ENDPOINT_CAPTURE 2
+#define ENDPOINT_PLAYBACK 6
+
+#define MAKE_CHECKBYTE(cdev,stream,i) \
+ (stream << 1) | (~(i / (cdev->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 = 128,
+ .period_bytes_max = MAX_BUFFER_SIZE,
+ .periods_min = 1,
+ .periods_max = 1024,
+};
+
+static void
+activate_substream(struct snd_usb_caiaqdev *cdev,
+ struct snd_pcm_substream *sub)
+{
+ spin_lock(&cdev->spinlock);
+
+ if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ cdev->sub_playback[sub->number] = sub;
+ else
+ cdev->sub_capture[sub->number] = sub;
+
+ spin_unlock(&cdev->spinlock);
+}
+
+static void
+deactivate_substream(struct snd_usb_caiaqdev *cdev,
+ struct snd_pcm_substream *sub)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&cdev->spinlock, flags);
+
+ if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ cdev->sub_playback[sub->number] = NULL;
+ else
+ cdev->sub_capture[sub->number] = NULL;
+
+ spin_unlock_irqrestore(&cdev->spinlock, flags);
+}
+
+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 *cdev)
+{
+ int i, ret;
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ dev_dbg(dev, "%s(%p)\n", __func__, cdev);
+
+ if (cdev->streaming)
+ return -EINVAL;
+
+ memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
+ memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
+ cdev->input_panic = 0;
+ cdev->output_panic = 0;
+ cdev->first_packet = 4;
+ cdev->streaming = 1;
+ cdev->warned = 0;
+
+ for (i = 0; i < N_URBS; i++) {
+ ret = usb_submit_urb(cdev->data_urbs_in[i], GFP_ATOMIC);
+ if (ret) {
+ dev_err(dev, "unable to trigger read #%d! (ret %d)\n",
+ i, ret);
+ cdev->streaming = 0;
+ return -EPIPE;
+ }
+ }
+
+ return 0;
+}
+
+static void stream_stop(struct snd_usb_caiaqdev *cdev)
+{
+ int i;
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ dev_dbg(dev, "%s(%p)\n", __func__, cdev);
+ if (!cdev->streaming)
+ return;
+
+ cdev->streaming = 0;
+
+ for (i = 0; i < N_URBS; i++) {
+ usb_kill_urb(cdev->data_urbs_in[i]);
+
+ if (test_bit(i, &cdev->outurb_active_mask))
+ usb_kill_urb(cdev->data_urbs_out[i]);
+ }
+
+ cdev->outurb_active_mask = 0;
+}
+
+static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
+{
+ struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream);
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ dev_dbg(dev, "%s(%p)\n", __func__, substream);
+ substream->runtime->hw = cdev->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 *cdev = snd_pcm_substream_chip(substream);
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ dev_dbg(dev, "%s(%p)\n", __func__, substream);
+ if (all_substreams_zero(cdev->sub_playback) &&
+ all_substreams_zero(cdev->sub_capture)) {
+ /* when the last client has stopped streaming,
+ * all sample rates are allowed again */
+ stream_stop(cdev);
+ cdev->pcm_info.rates = cdev->samplerates;
+ }
+
+ return 0;
+}
+
+static int snd_usb_caiaq_pcm_hw_params(struct snd_pcm_substream *sub,
+ struct snd_pcm_hw_params *hw_params)
+{
+ return snd_pcm_lib_alloc_vmalloc_buffer(sub,
+ params_buffer_bytes(hw_params));
+}
+
+static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub)
+{
+ struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
+ deactivate_substream(cdev, sub);
+ return snd_pcm_lib_free_vmalloc_buffer(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 *cdev = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ dev_dbg(dev, "%s(%p)\n", __func__, substream);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ int out_pos;
+
+ switch (cdev->spec.data_alignment) {
+ case 0:
+ case 2:
+ out_pos = BYTES_PER_SAMPLE + 1;
+ break;
+ case 3:
+ default:
+ out_pos = 0;
+ break;
+ }
+
+ cdev->period_out_count[index] = out_pos;
+ cdev->audio_out_buf_pos[index] = out_pos;
+ } else {
+ int in_pos;
+
+ switch (cdev->spec.data_alignment) {
+ case 0:
+ in_pos = BYTES_PER_SAMPLE + 2;
+ break;
+ case 2:
+ in_pos = BYTES_PER_SAMPLE;
+ break;
+ case 3:
+ default:
+ in_pos = 0;
+ break;
+ }
+
+ cdev->period_in_count[index] = in_pos;
+ cdev->audio_in_buf_pos[index] = in_pos;
+ }
+
+ if (cdev->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])
+ cdev->pcm_info.rates = 1 << i;
+
+ snd_pcm_limit_hw_rates(runtime);
+
+ bytes_per_sample = BYTES_PER_SAMPLE;
+ if (cdev->spec.data_alignment >= 2)
+ bytes_per_sample++;
+
+ bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE)
+ * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams;
+
+ if (bpp > MAX_ENDPOINT_SIZE)
+ bpp = MAX_ENDPOINT_SIZE;
+
+ ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate,
+ runtime->sample_bits, bpp);
+ if (ret)
+ return ret;
+
+ ret = stream_start(cdev);
+ if (ret)
+ return ret;
+
+ cdev->output_running = 0;
+ wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ);
+ if (!cdev->output_running) {
+ stream_stop(cdev);
+ return -EPIPE;
+ }
+
+ return 0;
+}
+
+static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd)
+{
+ struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub);
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ activate_substream(cdev, sub);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ deactivate_substream(cdev, sub);
+ 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 *cdev = snd_pcm_substream_chip(sub);
+ snd_pcm_uframes_t ptr;
+
+ spin_lock(&cdev->spinlock);
+
+ if (cdev->input_panic || cdev->output_panic) {
+ ptr = SNDRV_PCM_POS_XRUN;
+ goto unlock;
+ }
+
+ if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ ptr = bytes_to_frames(sub->runtime,
+ cdev->audio_out_buf_pos[index]);
+ else
+ ptr = bytes_to_frames(sub->runtime,
+ cdev->audio_in_buf_pos[index]);
+
+unlock:
+ spin_unlock(&cdev->spinlock);
+ return ptr;
+}
+
+/* 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,
+ .page = snd_pcm_lib_get_vmalloc_page,
+ .mmap = snd_pcm_lib_mmap_vmalloc,
+};
+
+static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev,
+ struct snd_pcm_substream **subs)
+{
+ int stream, pb, *cnt;
+ struct snd_pcm_substream *sub;
+
+ for (stream = 0; stream < cdev->n_streams; stream++) {
+ sub = subs[stream];
+ if (!sub)
+ continue;
+
+ pb = snd_pcm_lib_period_bytes(sub);
+ cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+ &cdev->period_out_count[stream] :
+ &cdev->period_in_count[stream];
+
+ if (*cnt >= pb) {
+ snd_pcm_period_elapsed(sub);
+ *cnt %= pb;
+ }
+ }
+}
+
+static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev,
+ 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(cdev->sub_capture))
+ return;
+
+ for (i = 0; i < iso->actual_length;) {
+ for (stream = 0; stream < cdev->n_streams; stream++, i++) {
+ sub = cdev->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[cdev->audio_in_buf_pos[stream]++]
+ = usb_buf[i];
+ cdev->period_in_count[stream]++;
+ if (cdev->audio_in_buf_pos[stream] == sz)
+ cdev->audio_in_buf_pos[stream] = 0;
+ }
+ }
+ }
+}
+
+static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev,
+ 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;
+
+ for (i = 0; i < iso->actual_length;) {
+ if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) {
+ for (stream = 0;
+ stream < cdev->n_streams;
+ stream++, i++) {
+ if (cdev->first_packet)
+ continue;
+
+ check_byte = MAKE_CHECKBYTE(cdev, stream, i);
+
+ if ((usb_buf[i] & 0x3f) != check_byte)
+ cdev->input_panic = 1;
+
+ if (usb_buf[i] & 0x80)
+ cdev->output_panic = 1;
+ }
+ }
+ cdev->first_packet = 0;
+
+ for (stream = 0; stream < cdev->n_streams; stream++, i++) {
+ sub = cdev->sub_capture[stream];
+ if (cdev->input_panic)
+ usb_buf[i] = 0;
+
+ 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[cdev->audio_in_buf_pos[stream]++] =
+ usb_buf[i];
+ cdev->period_in_count[stream]++;
+ if (cdev->audio_in_buf_pos[stream] == sz)
+ cdev->audio_in_buf_pos[stream] = 0;
+ }
+ }
+ }
+}
+
+static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev,
+ const struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
+ struct device *dev = caiaqdev_to_dev(cdev);
+ int stream, i;
+
+ /* paranoia check */
+ if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM))
+ return;
+
+ for (i = 0; i < iso->actual_length;) {
+ for (stream = 0; stream < cdev->n_streams; stream++) {
+ struct snd_pcm_substream *sub = cdev->sub_capture[stream];
+ char *audio_buf = NULL;
+ int c, n, sz = 0;
+
+ if (sub && !cdev->input_panic) {
+ struct snd_pcm_runtime *rt = sub->runtime;
+ audio_buf = rt->dma_area;
+ sz = frames_to_bytes(rt, rt->buffer_size);
+ }
+
+ for (c = 0; c < CHANNELS_PER_STREAM; c++) {
+ /* 3 audio data bytes, followed by 1 check byte */
+ if (audio_buf) {
+ for (n = 0; n < BYTES_PER_SAMPLE; n++) {
+ audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
+
+ if (cdev->audio_in_buf_pos[stream] == sz)
+ cdev->audio_in_buf_pos[stream] = 0;
+ }
+
+ cdev->period_in_count[stream] += BYTES_PER_SAMPLE;
+ }
+
+ i += BYTES_PER_SAMPLE;
+
+ if (usb_buf[i] != ((stream << 1) | c) &&
+ !cdev->first_packet) {
+ if (!cdev->input_panic)
+ dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
+ ((stream << 1) | c), usb_buf[i], c, stream, i);
+ cdev->input_panic = 1;
+ }
+
+ i++;
+ }
+ }
+ }
+
+ if (cdev->first_packet > 0)
+ cdev->first_packet--;
+}
+
+static void read_in_urb(struct snd_usb_caiaqdev *cdev,
+ const struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ if (!cdev->streaming)
+ return;
+
+ if (iso->actual_length < cdev->bpp)
+ return;
+
+ switch (cdev->spec.data_alignment) {
+ case 0:
+ read_in_urb_mode0(cdev, urb, iso);
+ break;
+ case 2:
+ read_in_urb_mode2(cdev, urb, iso);
+ break;
+ case 3:
+ read_in_urb_mode3(cdev, urb, iso);
+ break;
+ }
+
+ if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) {
+ dev_warn(dev, "streaming error detected %s %s\n",
+ cdev->input_panic ? "(input)" : "",
+ cdev->output_panic ? "(output)" : "");
+ cdev->warned = 1;
+ }
+}
+
+static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev,
+ 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;
+
+ for (i = 0; i < iso->length;) {
+ for (stream = 0; stream < cdev->n_streams; stream++, i++) {
+ sub = cdev->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[cdev->audio_out_buf_pos[stream]];
+ cdev->period_out_count[stream]++;
+ cdev->audio_out_buf_pos[stream]++;
+ if (cdev->audio_out_buf_pos[stream] == sz)
+ cdev->audio_out_buf_pos[stream] = 0;
+ } else
+ usb_buf[i] = 0;
+ }
+
+ /* fill in the check bytes */
+ if (cdev->spec.data_alignment == 2 &&
+ i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) ==
+ (cdev->n_streams * CHANNELS_PER_STREAM))
+ for (stream = 0; stream < cdev->n_streams; stream++, i++)
+ usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i);
+ }
+}
+
+static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev,
+ struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ unsigned char *usb_buf = urb->transfer_buffer + iso->offset;
+ int stream, i;
+
+ for (i = 0; i < iso->length;) {
+ for (stream = 0; stream < cdev->n_streams; stream++) {
+ struct snd_pcm_substream *sub = cdev->sub_playback[stream];
+ char *audio_buf = NULL;
+ int c, n, sz = 0;
+
+ if (sub) {
+ struct snd_pcm_runtime *rt = sub->runtime;
+ audio_buf = rt->dma_area;
+ sz = frames_to_bytes(rt, rt->buffer_size);
+ }
+
+ for (c = 0; c < CHANNELS_PER_STREAM; c++) {
+ for (n = 0; n < BYTES_PER_SAMPLE; n++) {
+ if (audio_buf) {
+ usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++];
+
+ if (cdev->audio_out_buf_pos[stream] == sz)
+ cdev->audio_out_buf_pos[stream] = 0;
+ } else {
+ usb_buf[i+n] = 0;
+ }
+ }
+
+ if (audio_buf)
+ cdev->period_out_count[stream] += BYTES_PER_SAMPLE;
+
+ i += BYTES_PER_SAMPLE;
+
+ /* fill in the check byte pattern */
+ usb_buf[i++] = (stream << 1) | c;
+ }
+ }
+ }
+}
+
+static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev,
+ struct urb *urb,
+ const struct usb_iso_packet_descriptor *iso)
+{
+ switch (cdev->spec.data_alignment) {
+ case 0:
+ case 2:
+ fill_out_urb_mode_0(cdev, urb, iso);
+ break;
+ case 3:
+ fill_out_urb_mode_3(cdev, urb, iso);
+ break;
+ }
+}
+
+static void read_completed(struct urb *urb)
+{
+ struct snd_usb_caiaq_cb_info *info = urb->context;
+ struct snd_usb_caiaqdev *cdev;
+ struct device *dev;
+ struct urb *out = NULL;
+ int i, frame, len, send_it = 0, outframe = 0;
+ size_t offset = 0;
+
+ if (urb->status || !info)
+ return;
+
+ cdev = info->cdev;
+ dev = caiaqdev_to_dev(cdev);
+
+ if (!cdev->streaming)
+ return;
+
+ /* find an unused output urb that is unused */
+ for (i = 0; i < N_URBS; i++)
+ if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) {
+ out = cdev->data_urbs_out[i];
+ break;
+ }
+
+ if (!out) {
+ dev_err(dev, "Unable to find an output urb to use\n");
+ goto requeue;
+ }
+
+ /* 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 = offset;
+ offset += len;
+
+ if (len > 0) {
+ spin_lock(&cdev->spinlock);
+ fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]);
+ read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]);
+ spin_unlock(&cdev->spinlock);
+ check_for_elapsed_periods(cdev, cdev->sub_playback);
+ check_for_elapsed_periods(cdev, cdev->sub_capture);
+ send_it = 1;
+ }
+
+ outframe++;
+ }
+
+ if (send_it) {
+ out->number_of_packets = outframe;
+ usb_submit_urb(out, GFP_ATOMIC);
+ } else {
+ struct snd_usb_caiaq_cb_info *oinfo = out->context;
+ clear_bit(oinfo->index, &cdev->outurb_active_mask);
+ }
+
+requeue:
+ /* 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;
+ 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 *cdev = info->cdev;
+
+ if (!cdev->output_running) {
+ cdev->output_running = 1;
+ wake_up(&cdev->prepare_wait_queue);
+ }
+
+ clear_bit(info->index, &cdev->outurb_active_mask);
+}
+
+static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret)
+{
+ int i, frame;
+ struct urb **urbs;
+ struct usb_device *usb_dev = cdev->chip.dev;
+ struct device *dev = caiaqdev_to_dev(cdev);
+ 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) {
+ dev_err(dev, "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]) {
+ dev_err(dev, "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) {
+ dev_err(dev, "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 = &cdev->data_cb_info[i];
+ urbs[i]->interval = 1;
+ 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 snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev)
+{
+ int i, ret;
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ cdev->n_audio_in = max(cdev->spec.num_analog_audio_in,
+ cdev->spec.num_digital_audio_in) /
+ CHANNELS_PER_STREAM;
+ cdev->n_audio_out = max(cdev->spec.num_analog_audio_out,
+ cdev->spec.num_digital_audio_out) /
+ CHANNELS_PER_STREAM;
+ cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out);
+
+ dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in);
+ dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out);
+ dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams);
+
+ if (cdev->n_streams > MAX_STREAMS) {
+ dev_err(dev, "unable to initialize device, too many streams.\n");
+ return -EINVAL;
+ }
+
+ if (cdev->n_streams < 1) {
+ dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams);
+ return -EINVAL;
+ }
+
+ ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0,
+ cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm);
+
+ if (ret < 0) {
+ dev_err(dev, "snd_pcm_new() returned %d\n", ret);
+ return ret;
+ }
+
+ cdev->pcm->private_data = cdev;
+ strlcpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name));
+
+ memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback));
+ memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture));
+
+ memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware,
+ sizeof(snd_usb_caiaq_pcm_hardware));
+
+ /* setup samplerates */
+ cdev->samplerates = cdev->pcm_info.rates;
+ switch (cdev->chip.usb_id) {
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
+ cdev->samplerates |= SNDRV_PCM_RATE_192000;
+ /* fall thru */
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
+ case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2):
+ cdev->samplerates |= SNDRV_PCM_RATE_88200;
+ break;
+ }
+
+ snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &snd_usb_caiaq_ops);
+ snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &snd_usb_caiaq_ops);
+
+ cdev->data_cb_info =
+ kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
+ GFP_KERNEL);
+
+ if (!cdev->data_cb_info)
+ return -ENOMEM;
+
+ cdev->outurb_active_mask = 0;
+ BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8));
+
+ for (i = 0; i < N_URBS; i++) {
+ cdev->data_cb_info[i].cdev = cdev;
+ cdev->data_cb_info[i].index = i;
+ }
+
+ cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret);
+ if (ret < 0) {
+ kfree(cdev->data_cb_info);
+ free_urbs(cdev->data_urbs_in);
+ return ret;
+ }
+
+ cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
+ if (ret < 0) {
+ kfree(cdev->data_cb_info);
+ free_urbs(cdev->data_urbs_in);
+ free_urbs(cdev->data_urbs_out);
+ return ret;
+ }
+
+ return 0;
+}
+
+void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev)
+{
+ struct device *dev = caiaqdev_to_dev(cdev);
+
+ dev_dbg(dev, "%s(%p)\n", __func__, cdev);
+ stream_stop(cdev);
+ free_urbs(cdev->data_urbs_in);
+ free_urbs(cdev->data_urbs_out);
+ kfree(cdev->data_cb_info);
+}
+
Code Review / kvmfornfv.git / blobdiff