mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 22:45:23 +07:00
d8131e67f0
The codes to unlink and sync URBs are identical for both playback and capture streams. Consolidate to single helper functions. Tested-by: Chris Rorvick <chris@rorvick.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
358 lines
8.5 KiB
C
358 lines
8.5 KiB
C
/*
|
|
* Line 6 Linux USB driver
|
|
*
|
|
* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
|
|
*
|
|
* 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, version 2.
|
|
*
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
|
|
#include "capture.h"
|
|
#include "driver.h"
|
|
#include "pcm.h"
|
|
|
|
/*
|
|
Find a free URB and submit it.
|
|
*/
|
|
static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm)
|
|
{
|
|
int index;
|
|
unsigned long flags;
|
|
int i, urb_size;
|
|
int ret;
|
|
struct urb *urb_in;
|
|
|
|
spin_lock_irqsave(&line6pcm->in.lock, flags);
|
|
index =
|
|
find_first_zero_bit(&line6pcm->in.active_urbs, LINE6_ISO_BUFFERS);
|
|
|
|
if (index < 0 || index >= LINE6_ISO_BUFFERS) {
|
|
spin_unlock_irqrestore(&line6pcm->in.lock, flags);
|
|
dev_err(line6pcm->line6->ifcdev, "no free URB found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
urb_in = line6pcm->in.urbs[index];
|
|
urb_size = 0;
|
|
|
|
for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
|
|
struct usb_iso_packet_descriptor *fin =
|
|
&urb_in->iso_frame_desc[i];
|
|
fin->offset = urb_size;
|
|
fin->length = line6pcm->max_packet_size;
|
|
urb_size += line6pcm->max_packet_size;
|
|
}
|
|
|
|
urb_in->transfer_buffer =
|
|
line6pcm->in.buffer +
|
|
index * LINE6_ISO_PACKETS * line6pcm->max_packet_size;
|
|
urb_in->transfer_buffer_length = urb_size;
|
|
urb_in->context = line6pcm;
|
|
|
|
ret = usb_submit_urb(urb_in, GFP_ATOMIC);
|
|
|
|
if (ret == 0)
|
|
set_bit(index, &line6pcm->in.active_urbs);
|
|
else
|
|
dev_err(line6pcm->line6->ifcdev,
|
|
"URB in #%d submission failed (%d)\n", index, ret);
|
|
|
|
spin_unlock_irqrestore(&line6pcm->in.lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
Submit all currently available capture URBs.
|
|
*/
|
|
int line6_submit_audio_in_all_urbs(struct snd_line6_pcm *line6pcm)
|
|
{
|
|
int ret, i;
|
|
|
|
for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {
|
|
ret = submit_audio_in_urb(line6pcm);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
Copy data into ALSA capture buffer.
|
|
*/
|
|
void line6_capture_copy(struct snd_line6_pcm *line6pcm, char *fbuf, int fsize)
|
|
{
|
|
struct snd_pcm_substream *substream =
|
|
get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE);
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
const int bytes_per_frame = line6pcm->properties->bytes_per_frame;
|
|
int frames = fsize / bytes_per_frame;
|
|
|
|
if (runtime == NULL)
|
|
return;
|
|
|
|
if (line6pcm->in.pos_done + frames > runtime->buffer_size) {
|
|
/*
|
|
The transferred area goes over buffer boundary,
|
|
copy two separate chunks.
|
|
*/
|
|
int len;
|
|
|
|
len = runtime->buffer_size - line6pcm->in.pos_done;
|
|
|
|
if (len > 0) {
|
|
memcpy(runtime->dma_area +
|
|
line6pcm->in.pos_done * bytes_per_frame, fbuf,
|
|
len * bytes_per_frame);
|
|
memcpy(runtime->dma_area, fbuf + len * bytes_per_frame,
|
|
(frames - len) * bytes_per_frame);
|
|
} else {
|
|
/* this is somewhat paranoid */
|
|
dev_err(line6pcm->line6->ifcdev,
|
|
"driver bug: len = %d\n", len);
|
|
}
|
|
} else {
|
|
/* copy single chunk */
|
|
memcpy(runtime->dma_area +
|
|
line6pcm->in.pos_done * bytes_per_frame, fbuf, fsize);
|
|
}
|
|
|
|
line6pcm->in.pos_done += frames;
|
|
if (line6pcm->in.pos_done >= runtime->buffer_size)
|
|
line6pcm->in.pos_done -= runtime->buffer_size;
|
|
}
|
|
|
|
void line6_capture_check_period(struct snd_line6_pcm *line6pcm, int length)
|
|
{
|
|
struct snd_pcm_substream *substream =
|
|
get_substream(line6pcm, SNDRV_PCM_STREAM_CAPTURE);
|
|
|
|
line6pcm->in.bytes += length;
|
|
if (line6pcm->in.bytes >= line6pcm->in.period) {
|
|
line6pcm->in.bytes %= line6pcm->in.period;
|
|
snd_pcm_period_elapsed(substream);
|
|
}
|
|
}
|
|
|
|
void line6_free_capture_buffer(struct snd_line6_pcm *line6pcm)
|
|
{
|
|
kfree(line6pcm->in.buffer);
|
|
line6pcm->in.buffer = NULL;
|
|
}
|
|
|
|
/*
|
|
* Callback for completed capture URB.
|
|
*/
|
|
static void audio_in_callback(struct urb *urb)
|
|
{
|
|
int i, index, length = 0, shutdown = 0;
|
|
unsigned long flags;
|
|
|
|
struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context;
|
|
|
|
line6pcm->in.last_frame = urb->start_frame;
|
|
|
|
/* find index of URB */
|
|
for (index = 0; index < LINE6_ISO_BUFFERS; ++index)
|
|
if (urb == line6pcm->in.urbs[index])
|
|
break;
|
|
|
|
spin_lock_irqsave(&line6pcm->in.lock, flags);
|
|
|
|
for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
|
|
char *fbuf;
|
|
int fsize;
|
|
struct usb_iso_packet_descriptor *fin = &urb->iso_frame_desc[i];
|
|
|
|
if (fin->status == -EXDEV) {
|
|
shutdown = 1;
|
|
break;
|
|
}
|
|
|
|
fbuf = urb->transfer_buffer + fin->offset;
|
|
fsize = fin->actual_length;
|
|
|
|
if (fsize > line6pcm->max_packet_size) {
|
|
dev_err(line6pcm->line6->ifcdev,
|
|
"driver and/or device bug: packet too large (%d > %d)\n",
|
|
fsize, line6pcm->max_packet_size);
|
|
}
|
|
|
|
length += fsize;
|
|
|
|
/* the following assumes LINE6_ISO_PACKETS == 1: */
|
|
line6pcm->prev_fbuf = fbuf;
|
|
line6pcm->prev_fsize = fsize;
|
|
|
|
if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE))
|
|
if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM,
|
|
&line6pcm->flags) && (fsize > 0))
|
|
line6_capture_copy(line6pcm, fbuf, fsize);
|
|
}
|
|
|
|
clear_bit(index, &line6pcm->in.active_urbs);
|
|
|
|
if (test_and_clear_bit(index, &line6pcm->in.unlink_urbs))
|
|
shutdown = 1;
|
|
|
|
spin_unlock_irqrestore(&line6pcm->in.lock, flags);
|
|
|
|
if (!shutdown) {
|
|
submit_audio_in_urb(line6pcm);
|
|
|
|
if (!(line6pcm->flags & LINE6_BITS_PCM_IMPULSE))
|
|
if (test_bit(LINE6_INDEX_PCM_ALSA_CAPTURE_STREAM,
|
|
&line6pcm->flags))
|
|
line6_capture_check_period(line6pcm, length);
|
|
}
|
|
}
|
|
|
|
/* open capture callback */
|
|
static int snd_line6_capture_open(struct snd_pcm_substream *substream)
|
|
{
|
|
int err;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
|
|
|
|
err = snd_pcm_hw_constraint_ratdens(runtime, 0,
|
|
SNDRV_PCM_HW_PARAM_RATE,
|
|
(&line6pcm->
|
|
properties->snd_line6_rates));
|
|
if (err < 0)
|
|
return err;
|
|
|
|
runtime->hw = line6pcm->properties->snd_line6_capture_hw;
|
|
return 0;
|
|
}
|
|
|
|
/* close capture callback */
|
|
static int snd_line6_capture_close(struct snd_pcm_substream *substream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* hw_params capture callback */
|
|
static int snd_line6_capture_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *hw_params)
|
|
{
|
|
int ret;
|
|
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
|
|
|
|
ret = line6_pcm_acquire(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = snd_pcm_lib_malloc_pages(substream,
|
|
params_buffer_bytes(hw_params));
|
|
if (ret < 0) {
|
|
line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
|
|
return ret;
|
|
}
|
|
|
|
line6pcm->in.period = params_period_bytes(hw_params);
|
|
return 0;
|
|
}
|
|
|
|
/* hw_free capture callback */
|
|
static int snd_line6_capture_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
|
|
|
|
line6_pcm_release(line6pcm, LINE6_BIT_PCM_ALSA_CAPTURE_BUFFER);
|
|
return snd_pcm_lib_free_pages(substream);
|
|
}
|
|
|
|
/* trigger callback */
|
|
int snd_line6_capture_trigger(struct snd_line6_pcm *line6pcm, int cmd)
|
|
{
|
|
int err;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
err = line6_pcm_acquire(line6pcm,
|
|
LINE6_BIT_PCM_ALSA_CAPTURE_STREAM);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
err = line6_pcm_release(line6pcm,
|
|
LINE6_BIT_PCM_ALSA_CAPTURE_STREAM);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* capture pointer callback */
|
|
static snd_pcm_uframes_t
|
|
snd_line6_capture_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
|
|
|
|
return line6pcm->in.pos_done;
|
|
}
|
|
|
|
/* capture operators */
|
|
struct snd_pcm_ops snd_line6_capture_ops = {
|
|
.open = snd_line6_capture_open,
|
|
.close = snd_line6_capture_close,
|
|
.ioctl = snd_pcm_lib_ioctl,
|
|
.hw_params = snd_line6_capture_hw_params,
|
|
.hw_free = snd_line6_capture_hw_free,
|
|
.prepare = snd_line6_prepare,
|
|
.trigger = snd_line6_trigger,
|
|
.pointer = snd_line6_capture_pointer,
|
|
};
|
|
|
|
int line6_create_audio_in_urbs(struct snd_line6_pcm *line6pcm)
|
|
{
|
|
struct usb_line6 *line6 = line6pcm->line6;
|
|
int i;
|
|
|
|
/* create audio URBs and fill in constant values: */
|
|
for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {
|
|
struct urb *urb;
|
|
|
|
/* URB for audio in: */
|
|
urb = line6pcm->in.urbs[i] =
|
|
usb_alloc_urb(LINE6_ISO_PACKETS, GFP_KERNEL);
|
|
|
|
if (urb == NULL)
|
|
return -ENOMEM;
|
|
|
|
urb->dev = line6->usbdev;
|
|
urb->pipe =
|
|
usb_rcvisocpipe(line6->usbdev,
|
|
line6->properties->ep_audio_r &
|
|
USB_ENDPOINT_NUMBER_MASK);
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
|
urb->start_frame = -1;
|
|
urb->number_of_packets = LINE6_ISO_PACKETS;
|
|
urb->interval = LINE6_ISO_INTERVAL;
|
|
urb->error_count = 0;
|
|
urb->complete = audio_in_callback;
|
|
}
|
|
|
|
return 0;
|
|
}
|