![Mark Hills](/assets/img/avatar_default.png)
Commit 3702b08
added a lock, but did not account for the case of
SNDRV_PCM_POS_XRUN, which would get immediately overwritten.
This could be bundled into one if-else-if statement, but the goto
helps to clarify the 'exceptional' case.
Thanks to Andreas Pape for spotting this.
Signed-off-by: Mark Hills <mark@pogo.org.uk>
Acked-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
890 lines
22 KiB
C
890 lines
22 KiB
C
/*
|
|
* 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/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(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 = 128,
|
|
.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)
|
|
{
|
|
spin_lock(&dev->spinlock);
|
|
|
|
if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
dev->sub_playback[sub->number] = sub;
|
|
else
|
|
dev->sub_capture[sub->number] = sub;
|
|
|
|
spin_unlock(&dev->spinlock);
|
|
}
|
|
|
|
static void
|
|
deactivate_substream(struct snd_usb_caiaqdev *dev,
|
|
struct snd_pcm_substream *sub)
|
|
{
|
|
unsigned long flags;
|
|
spin_lock_irqsave(&dev->spinlock, flags);
|
|
|
|
if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
dev->sub_playback[sub->number] = NULL;
|
|
else
|
|
dev->sub_capture[sub->number] = NULL;
|
|
|
|
spin_unlock_irqrestore(&dev->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 *dev)
|
|
{
|
|
int i, ret;
|
|
|
|
debug("%s(%p)\n", __func__, dev);
|
|
|
|
if (dev->streaming)
|
|
return -EINVAL;
|
|
|
|
memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
|
|
memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
|
|
dev->input_panic = 0;
|
|
dev->output_panic = 0;
|
|
dev->first_packet = 4;
|
|
dev->streaming = 1;
|
|
dev->warned = 0;
|
|
|
|
for (i = 0; i < N_URBS; i++) {
|
|
ret = usb_submit_urb(dev->data_urbs_in[i], GFP_ATOMIC);
|
|
if (ret) {
|
|
log("unable to trigger read #%d! (ret %d)\n", i, ret);
|
|
dev->streaming = 0;
|
|
return -EPIPE;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void stream_stop(struct snd_usb_caiaqdev *dev)
|
|
{
|
|
int i;
|
|
|
|
debug("%s(%p)\n", __func__, dev);
|
|
if (!dev->streaming)
|
|
return;
|
|
|
|
dev->streaming = 0;
|
|
|
|
for (i = 0; i < N_URBS; i++) {
|
|
usb_kill_urb(dev->data_urbs_in[i]);
|
|
|
|
if (test_bit(i, &dev->outurb_active_mask))
|
|
usb_kill_urb(dev->data_urbs_out[i]);
|
|
}
|
|
|
|
dev->outurb_active_mask = 0;
|
|
}
|
|
|
|
static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(substream);
|
|
debug("%s(%p)\n", __func__, 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("%s(%p)\n", __func__, 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("%s(%p)\n", __func__, 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("%s(%p)\n", __func__, sub);
|
|
deactivate_substream(dev, sub);
|
|
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("%s(%p)\n", __func__, substream);
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
int out_pos;
|
|
|
|
switch (dev->spec.data_alignment) {
|
|
case 0:
|
|
case 2:
|
|
out_pos = BYTES_PER_SAMPLE + 1;
|
|
break;
|
|
case 3:
|
|
default:
|
|
out_pos = 0;
|
|
break;
|
|
}
|
|
|
|
dev->period_out_count[index] = out_pos;
|
|
dev->audio_out_buf_pos[index] = out_pos;
|
|
} else {
|
|
int in_pos;
|
|
|
|
switch (dev->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;
|
|
}
|
|
|
|
dev->period_in_count[index] = in_pos;
|
|
dev->audio_in_buf_pos[index] = in_pos;
|
|
}
|
|
|
|
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;
|
|
|
|
if (bpp > MAX_ENDPOINT_SIZE)
|
|
bpp = MAX_ENDPOINT_SIZE;
|
|
|
|
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);
|
|
|
|
debug("%s(%p) cmd %d\n", __func__, sub, cmd);
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
activate_substream(dev, sub);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
deactivate_substream(dev, 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 *dev = snd_pcm_substream_chip(sub);
|
|
snd_pcm_uframes_t ptr;
|
|
|
|
spin_lock(&dev->spinlock);
|
|
|
|
if (dev->input_panic || dev->output_panic) {
|
|
ptr = SNDRV_PCM_POS_XRUN;
|
|
goto unlock;
|
|
}
|
|
|
|
if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
ptr = bytes_to_frames(sub->runtime,
|
|
dev->audio_out_buf_pos[index]);
|
|
else
|
|
ptr = bytes_to_frames(sub->runtime,
|
|
dev->audio_in_buf_pos[index]);
|
|
|
|
unlock:
|
|
spin_unlock(&dev->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
|
|
};
|
|
|
|
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 = snd_pcm_lib_period_bytes(sub);
|
|
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;
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
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 (dev->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[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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void read_in_urb_mode3(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;
|
|
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 < dev->n_streams; stream++) {
|
|
struct snd_pcm_substream *sub = dev->sub_capture[stream];
|
|
char *audio_buf = NULL;
|
|
int c, n, sz = 0;
|
|
|
|
if (sub && !dev->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[dev->audio_in_buf_pos[stream]++] = usb_buf[i+n];
|
|
|
|
if (dev->audio_in_buf_pos[stream] == sz)
|
|
dev->audio_in_buf_pos[stream] = 0;
|
|
}
|
|
|
|
dev->period_in_count[stream] += BYTES_PER_SAMPLE;
|
|
}
|
|
|
|
i += BYTES_PER_SAMPLE;
|
|
|
|
if (usb_buf[i] != ((stream << 1) | c) &&
|
|
!dev->first_packet) {
|
|
if (!dev->input_panic)
|
|
printk(" EXPECTED: %02x got %02x, c %d, stream %d, i %d\n",
|
|
((stream << 1) | c), usb_buf[i], c, stream, i);
|
|
dev->input_panic = 1;
|
|
}
|
|
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dev->first_packet > 0)
|
|
dev->first_packet--;
|
|
}
|
|
|
|
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;
|
|
|
|
if (iso->actual_length < dev->bpp)
|
|
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;
|
|
case 3:
|
|
read_in_urb_mode3(dev, urb, iso);
|
|
break;
|
|
}
|
|
|
|
if ((dev->input_panic || dev->output_panic) && !dev->warned) {
|
|
debug("streaming error detected %s %s\n",
|
|
dev->input_panic ? "(input)" : "",
|
|
dev->output_panic ? "(output)" : "");
|
|
dev->warned = 1;
|
|
}
|
|
}
|
|
|
|
static void fill_out_urb_mode_0(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;
|
|
|
|
for (i = 0; i < iso->length;) {
|
|
for (stream = 0; stream < dev->n_streams; stream++, i++) {
|
|
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->period_out_count[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);
|
|
}
|
|
}
|
|
|
|
static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *dev,
|
|
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 < dev->n_streams; stream++) {
|
|
struct snd_pcm_substream *sub = dev->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[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+n] = 0;
|
|
}
|
|
}
|
|
|
|
if (audio_buf)
|
|
dev->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 *dev,
|
|
struct urb *urb,
|
|
const struct usb_iso_packet_descriptor *iso)
|
|
{
|
|
switch (dev->spec.data_alignment) {
|
|
case 0:
|
|
case 2:
|
|
fill_out_urb_mode_0(dev, urb, iso);
|
|
break;
|
|
case 3:
|
|
fill_out_urb_mode_3(dev, urb, iso);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void read_completed(struct urb *urb)
|
|
{
|
|
struct snd_usb_caiaq_cb_info *info = urb->context;
|
|
struct snd_usb_caiaqdev *dev;
|
|
struct urb *out = NULL;
|
|
int i, frame, len, send_it = 0, outframe = 0;
|
|
size_t offset = 0;
|
|
|
|
if (urb->status || !info)
|
|
return;
|
|
|
|
dev = info->dev;
|
|
|
|
if (!dev->streaming)
|
|
return;
|
|
|
|
/* find an unused output urb that is unused */
|
|
for (i = 0; i < N_URBS; i++)
|
|
if (test_and_set_bit(i, &dev->outurb_active_mask) == 0) {
|
|
out = dev->data_urbs_out[i];
|
|
break;
|
|
}
|
|
|
|
if (!out) {
|
|
log("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(&dev->spinlock);
|
|
fill_out_urb(dev, out, &out->iso_frame_desc[outframe]);
|
|
read_in_urb(dev, urb, &urb->iso_frame_desc[frame]);
|
|
spin_unlock(&dev->spinlock);
|
|
check_for_elapsed_periods(dev, dev->sub_playback);
|
|
check_for_elapsed_periods(dev, dev->sub_capture);
|
|
send_it = 1;
|
|
}
|
|
|
|
outframe++;
|
|
}
|
|
|
|
if (send_it) {
|
|
out->number_of_packets = outframe;
|
|
out->transfer_flags = URB_ISO_ASAP;
|
|
usb_submit_urb(out, GFP_ATOMIC);
|
|
} else {
|
|
struct snd_usb_caiaq_cb_info *oinfo = out->context;
|
|
clear_bit(oinfo->index, &dev->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;
|
|
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);
|
|
}
|
|
|
|
clear_bit(info->index, &dev->outurb_active_mask);
|
|
}
|
|
|
|
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 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;
|
|
strlcpy(dev->pcm->name, dev->product_name, sizeof(dev->pcm->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):
|
|
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):
|
|
dev->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):
|
|
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;
|
|
|
|
dev->outurb_active_mask = 0;
|
|
BUILD_BUG_ON(N_URBS > (sizeof(dev->outurb_active_mask) * 8));
|
|
|
|
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("%s(%p)\n", __func__, dev);
|
|
stream_stop(dev);
|
|
free_urbs(dev->data_urbs_in);
|
|
free_urbs(dev->data_urbs_out);
|
|
kfree(dev->data_cb_info);
|
|
}
|
|
|