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Commit b2233d97 authored by Andrej Krutak's avatar Andrej Krutak Committed by Takashi Iwai
Browse files

ALSA: line6: Enable different number of URBs for frame transfers 



This basically changes LINE6_ISO_BUFFERS constant to a configurable
iso_buffers property.

Signed-off-by: default avatarAndrej Krutak <dev@andree.sk>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent c5a905d3

sound/usb/line6/capture.c

+11 −6
Original line number Diff line number Diff line
@@ -29,10 +29,10 @@ static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm) 
	int ret;

	struct urb *urb_in;



	index =

	    find_first_zero_bit(&line6pcm->in.active_urbs, LINE6_ISO_BUFFERS);

	index = find_first_zero_bit(&line6pcm->in.active_urbs,

				    line6pcm->line6->iso_buffers);



	if (index < 0 || index >= LINE6_ISO_BUFFERS) {

	if (index < 0 || index >= line6pcm->line6->iso_buffers) {

		dev_err(line6pcm->line6->ifcdev, "no free URB found\n");

		return -EINVAL;

	}
@@ -73,7 +73,7 @@ int line6_submit_audio_in_all_urbs(struct snd_line6_pcm *line6pcm) 
{

	int ret = 0, i;



	for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {

	for (i = 0; i < line6pcm->line6->iso_buffers; ++i) {

		ret = submit_audio_in_urb(line6pcm);

		if (ret < 0)

			break;
@@ -154,7 +154,7 @@ static void audio_in_callback(struct urb *urb) 
	line6pcm->in.last_frame = urb->start_frame;



	/* find index of URB */

	for (index = 0; index < LINE6_ISO_BUFFERS; ++index)

	for (index = 0; index < line6pcm->line6->iso_buffers; ++index)

		if (urb == line6pcm->in.urbs[index])

			break;
@@ -247,8 +247,13 @@ int line6_create_audio_in_urbs(struct snd_line6_pcm *line6pcm) 
	struct usb_line6 *line6 = line6pcm->line6;

	int i;



	line6pcm->in.urbs = kzalloc(

		sizeof(struct urb *) * line6->iso_buffers, GFP_KERNEL);

	if (line6pcm->in.urbs == NULL)

		return -ENOMEM;



	/* create audio URBs and fill in constant values: */

	for (i = 0; i < LINE6_ISO_BUFFERS; ++i) {

	for (i = 0; i < line6->iso_buffers; ++i) {

		struct urb *urb;



		/* URB for audio in: */

sound/usb/line6/driver.c

+1 −0
Original line number Diff line number Diff line
@@ -467,6 +467,7 @@ static void line6_get_interval(struct usb_line6 *line6) 
	unsigned epnum = usb_pipeendpoint(pipe);



	ep = usbdev->ep_in[epnum];

	line6->iso_buffers = LINE6_ISO_BUFFERS;

	if (ep) {

		line6->interval = ep->desc.bInterval;

		line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);

sound/usb/line6/driver.h

+2 −0
Original line number Diff line number Diff line
@@ -111,6 +111,8 @@ struct usb_line6 { 


	/* Interval (ms) */

	int interval;

	/* Number of isochronous URBs used for frame transfers */

	int iso_buffers;



	/* Maximum size of USB packet */

	int max_packet_size;

sound/usb/line6/pcm.c

+14 −7
Original line number Diff line number Diff line
@@ -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++;

		}
@@ -153,7 +153,8 @@ static int line6_buffer_acquire(struct snd_line6_pcm *line6pcm, 
{

	/* 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 *

		pstr->buffer = kmalloc(line6pcm->line6->iso_buffers *

				       LINE6_ISO_PACKETS *

				       line6pcm->max_packet_size, GFP_KERNEL);

		if (!pstr->buffer)

			return -ENOMEM;
@@ -434,24 +435,30 @@ 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);

}

sound/usb/line6/pcm.h

+1 −1
Original line number Diff line number Diff line
@@ -90,7 +90,7 @@ struct line6_pcm_properties { 


struct line6_pcm_stream {

	/* allocated URBs */

	struct urb *urbs[LINE6_ISO_BUFFERS];

	struct urb **urbs;



	/* Temporary buffer;

	 * Since the packet size is not known in advance, this buffer is