aboutsummaryrefslogtreecommitdiffstats
path: root/sound/usb/line6/pcm.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/usb/line6/pcm.c')
-rw-r--r--sound/usb/line6/pcm.c83
1 files changed, 56 insertions, 27 deletions
diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c
index 41aa3355e920..fab53f58d447 100644
--- a/sound/usb/line6/pcm.c
+++ b/sound/usb/line6/pcm.c
@@ -52,7 +52,7 @@ static int snd_line6_impulse_volume_put(struct snd_kcontrol *kcontrol,
line6pcm->impulse_volume = value;
if (value > 0) {
- err = line6_pcm_acquire(line6pcm, LINE6_STREAM_IMPULSE);
+ err = line6_pcm_acquire(line6pcm, LINE6_STREAM_IMPULSE, true);
if (err < 0) {
line6pcm->impulse_volume = 0;
return err;
@@ -104,7 +104,7 @@ static void line6_unlink_audio_urbs(struct snd_line6_pcm *line6pcm,
{
int i;
- for (i = 0; i < LINE6_ISO_BUFFERS; i++) {
+ for (i = 0; i < line6pcm->line6->iso_buffers; i++) {
if (test_bit(i, &pcms->active_urbs)) {
if (!test_and_set_bit(i, &pcms->unlink_urbs))
usb_unlink_urb(pcms->urbs[i]);
@@ -124,7 +124,7 @@ static void line6_wait_clear_audio_urbs(struct snd_line6_pcm *line6pcm,
do {
alive = 0;
- for (i = 0; i < LINE6_ISO_BUFFERS; i++) {
+ for (i = 0; i < line6pcm->line6->iso_buffers; i++) {
if (test_bit(i, &pcms->active_urbs))
alive++;
}
@@ -146,15 +146,20 @@ get_stream(struct snd_line6_pcm *line6pcm, int direction)
}
/* allocate a buffer if not opened yet;
- * call this in line6pcm.state_change mutex
+ * call this in line6pcm.state_mutex
*/
static int line6_buffer_acquire(struct snd_line6_pcm *line6pcm,
- struct line6_pcm_stream *pstr, int type)
+ struct line6_pcm_stream *pstr, int direction, int type)
{
+ const int pkt_size =
+ (direction == SNDRV_PCM_STREAM_PLAYBACK) ?
+ line6pcm->max_packet_size_out :
+ line6pcm->max_packet_size_in;
+
/* Invoked multiple times in a row so allocate once only */
if (!test_and_set_bit(type, &pstr->opened) && !pstr->buffer) {
- pstr->buffer = kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
- line6pcm->max_packet_size, GFP_KERNEL);
+ pstr->buffer = kmalloc(line6pcm->line6->iso_buffers *
+ LINE6_ISO_PACKETS * pkt_size, GFP_KERNEL);
if (!pstr->buffer)
return -ENOMEM;
}
@@ -162,12 +167,11 @@ static int line6_buffer_acquire(struct snd_line6_pcm *line6pcm,
}
/* free a buffer if all streams are closed;
- * call this in line6pcm.state_change mutex
+ * call this in line6pcm.state_mutex
*/
static void line6_buffer_release(struct snd_line6_pcm *line6pcm,
struct line6_pcm_stream *pstr, int type)
{
-
clear_bit(type, &pstr->opened);
if (!pstr->opened) {
line6_wait_clear_audio_urbs(line6pcm, pstr);
@@ -194,6 +198,7 @@ static int line6_stream_start(struct snd_line6_pcm *line6pcm, int direction,
else
ret = line6_submit_audio_in_all_urbs(line6pcm);
}
+
if (ret < 0)
clear_bit(type, &pstr->running);
spin_unlock_irqrestore(&pstr->lock, flags);
@@ -237,6 +242,14 @@ int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
+ if (s->stream == SNDRV_PCM_STREAM_CAPTURE &&
+ (line6pcm->line6->properties->capabilities &
+ LINE6_CAP_IN_NEEDS_OUT)) {
+ err = line6_stream_start(line6pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ LINE6_STREAM_CAPTURE_HELPER);
+ if (err < 0)
+ return err;
+ }
err = line6_stream_start(line6pcm, s->stream,
LINE6_STREAM_PCM);
if (err < 0)
@@ -245,6 +258,12 @@ int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
+ if (s->stream == SNDRV_PCM_STREAM_CAPTURE &&
+ (line6pcm->line6->properties->capabilities &
+ LINE6_CAP_IN_NEEDS_OUT)) {
+ line6_stream_stop(line6pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ LINE6_STREAM_CAPTURE_HELPER);
+ }
line6_stream_stop(line6pcm, s->stream,
LINE6_STREAM_PCM);
break;
@@ -278,27 +297,30 @@ snd_pcm_uframes_t snd_line6_pointer(struct snd_pcm_substream *substream)
return pstr->pos_done;
}
-/* Acquire and start duplex streams:
+/* Acquire and optionally start duplex streams:
* type is either LINE6_STREAM_IMPULSE or LINE6_STREAM_MONITOR
*/
-int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int type)
+int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int type, bool start)
{
struct line6_pcm_stream *pstr;
int ret = 0, dir;
+ /* TODO: We should assert SNDRV_PCM_STREAM_PLAYBACK/CAPTURE == 0/1 */
mutex_lock(&line6pcm->state_mutex);
for (dir = 0; dir < 2; dir++) {
pstr = get_stream(line6pcm, dir);
- ret = line6_buffer_acquire(line6pcm, pstr, type);
+ ret = line6_buffer_acquire(line6pcm, pstr, dir, type);
if (ret < 0)
goto error;
if (!pstr->running)
line6_wait_clear_audio_urbs(line6pcm, pstr);
}
- for (dir = 0; dir < 2; dir++) {
- ret = line6_stream_start(line6pcm, dir, type);
- if (ret < 0)
- goto error;
+ if (start) {
+ for (dir = 0; dir < 2; dir++) {
+ ret = line6_stream_start(line6pcm, dir, type);
+ if (ret < 0)
+ goto error;
+ }
}
error:
mutex_unlock(&line6pcm->state_mutex);
@@ -334,7 +356,8 @@ int snd_line6_hw_params(struct snd_pcm_substream *substream,
struct line6_pcm_stream *pstr = get_stream(line6pcm, substream->stream);
mutex_lock(&line6pcm->state_mutex);
- ret = line6_buffer_acquire(line6pcm, pstr, LINE6_STREAM_PCM);
+ ret = line6_buffer_acquire(line6pcm, pstr, substream->stream,
+ LINE6_STREAM_PCM);
if (ret < 0)
goto error;
@@ -434,24 +457,30 @@ static struct snd_kcontrol_new line6_controls[] = {
/*
Cleanup the PCM device.
*/
-static void cleanup_urbs(struct line6_pcm_stream *pcms)
+static void cleanup_urbs(struct line6_pcm_stream *pcms, int iso_buffers)
{
int i;
- for (i = 0; i < LINE6_ISO_BUFFERS; i++) {
+ /* Most likely impossible in current code... */
+ if (pcms->urbs == NULL)
+ return;
+
+ for (i = 0; i < iso_buffers; i++) {
if (pcms->urbs[i]) {
usb_kill_urb(pcms->urbs[i]);
usb_free_urb(pcms->urbs[i]);
}
}
+ kfree(pcms->urbs);
+ pcms->urbs = NULL;
}
static void line6_cleanup_pcm(struct snd_pcm *pcm)
{
struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
- cleanup_urbs(&line6pcm->out);
- cleanup_urbs(&line6pcm->in);
+ cleanup_urbs(&line6pcm->out, line6pcm->line6->iso_buffers);
+ cleanup_urbs(&line6pcm->in, line6pcm->line6->iso_buffers);
kfree(line6pcm);
}
@@ -523,12 +552,12 @@ int line6_init_pcm(struct usb_line6 *line6,
line6pcm->volume_monitor = 255;
line6pcm->line6 = line6;
- /* Read and write buffers are sized identically, so choose minimum */
- line6pcm->max_packet_size = min(
- usb_maxpacket(line6->usbdev,
- usb_rcvisocpipe(line6->usbdev, ep_read), 0),
- usb_maxpacket(line6->usbdev,
- usb_sndisocpipe(line6->usbdev, ep_write), 1));
+ line6pcm->max_packet_size_in =
+ usb_maxpacket(line6->usbdev,
+ usb_rcvisocpipe(line6->usbdev, ep_read), 0);
+ line6pcm->max_packet_size_out =
+ usb_maxpacket(line6->usbdev,
+ usb_sndisocpipe(line6->usbdev, ep_write), 1);
spin_lock_init(&line6pcm->out.lock);
spin_lock_init(&line6pcm->in.lock);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.