- 根目录:
- sound
- usb
- caiaq
- audio.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/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;
}
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);
}