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Commit 7811a3ad authored by Andrej Krutak's avatar Andrej Krutak Committed by Takashi Iwai
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ALSA: line6: Allow processing of raw incoming messages 



Not all PODs use MIDI via USB data interface, thus allow avoiding
that code and instead using direct processing.

Signed-off-by: default avatarAndrej Krutak <dev@andree.sk>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 174e1fc0

sound/usb/line6/driver.c

+34 −25
Original line number Diff line number Diff line
@@ -290,6 +290,7 @@ static void line6_data_received(struct urb *urb) 
	if (urb->status == -ESHUTDOWN)

		return;



	if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {

		done =

			line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
@@ -313,6 +314,10 @@ static void line6_data_received(struct urb *urb) 
			if (line6->process_message)

				line6->process_message(line6);

		}

	} else {

		if (line6->process_message)

			line6->process_message(line6);

	}



	line6_start_listen(line6);

}
@@ -469,7 +474,9 @@ static void line6_destruct(struct snd_card *card) 
	struct usb_device *usbdev = line6->usbdev;



	/* free buffer memory first: */

	if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)

		kfree(line6->buffer_message);



	kfree(line6->buffer_listen);



	/* then free URBs: */
@@ -515,7 +522,7 @@ static void line6_get_interval(struct usb_line6 *line6) 
	}

}



static int line6_init_cap_control_midi(struct usb_line6 *line6)

static int line6_init_cap_control(struct usb_line6 *line6)

{

	int ret;
@@ -524,14 +531,16 @@ static int line6_init_cap_control_midi(struct usb_line6 *line6) 
	if (!line6->buffer_listen)

		return -ENOMEM;



	line6->buffer_message = kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL);

	if (!line6->buffer_message)

		return -ENOMEM;



	line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);

	if (!line6->urb_listen)

		return -ENOMEM;



	if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {

		line6->buffer_message = kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL);

		if (!line6->buffer_message)

			return -ENOMEM;

	}



	ret = line6_start_listen(line6);

	if (ret < 0) {

		dev_err(line6->ifcdev, "cannot start listening: %d\n", ret);
@@ -605,8 +614,8 @@ int line6_probe(struct usb_interface *interface, 


	line6_get_interval(line6);



	if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {

		ret = line6_init_cap_control_midi(line6);

	if (properties->capabilities & LINE6_CAP_CONTROL) {

		ret = line6_init_cap_control(line6);

		if (ret < 0)

			goto error;

	}
@@ -676,7 +685,7 @@ int line6_suspend(struct usb_interface *interface, pm_message_t message) 


	snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot);



	if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)

	if (line6->properties->capabilities & LINE6_CAP_CONTROL)

		line6_stop_listen(line6);



	if (line6pcm != NULL) {
@@ -695,7 +704,7 @@ int line6_resume(struct usb_interface *interface) 
{

	struct usb_line6 *line6 = usb_get_intfdata(interface);



	if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)

	if (line6->properties->capabilities & LINE6_CAP_CONTROL)

		line6_start_listen(line6);



	snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0);

sound/usb/line6/driver.h

+6 −3
Original line number Diff line number Diff line
@@ -147,15 +147,18 @@ struct usb_line6 { 
	/* URB for listening to POD data endpoint */

	struct urb *urb_listen;



	/* Buffer for listening to POD data endpoint */

	/* Buffer for incoming data from POD data endpoint */

	unsigned char *buffer_listen;



	/* Buffer for message to be processed */

	/* Buffer for message to be processed, generated from MIDI layer */

	unsigned char *buffer_message;



	/* Length of message to be processed */

	/* Length of message to be processed, generated from MIDI layer  */

	int message_length;



	/* If MIDI is supported, buffer_message contains the pre-processed data;

	 * otherwise the data is only in urb_listen (buffer_incoming).

	 */

	void (*process_message)(struct usb_line6 *);

	void (*disconnect)(struct usb_line6 *line6);

};

sound/usb/line6/midi.c

+1 −1
Original line number Diff line number Diff line
@@ -258,7 +258,7 @@ int line6_init_midi(struct usb_line6 *line6) 
	struct snd_rawmidi *rmidi;

	struct snd_line6_midi *line6midi;



	if (!(line6->properties->capabilities & LINE6_CAP_CONTROL)) {

	if (!(line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI)) {

		/* skip MIDI initialization and report success */

		return 0;

	}