[deliverable/linux.git] / drivers / staging / line6 / midi.c

/*
 * Line6 Linux USB driver - 0.9.0
 *
 * 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 <linux/usb.h>
#include <sound/core.h>
#include <sound/rawmidi.h>

#include "audio.h"
#include "driver.h"
#include "midi.h"
#include "pod.h"
#include "usbdefs.h"


#define line6_rawmidi_substream_midi(substream) \
	((struct snd_line6_midi *)((substream)->rmidi->private_data))


static int send_midi_async(struct usb_line6 *line6, unsigned char *data,
			   int length);


/*
	Pass data received via USB to MIDI.
*/
void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
			int length)
{
	if (line6->line6midi->substream_receive)
		snd_rawmidi_receive(line6->line6midi->substream_receive,
				    data, length);
}

/*
	Read data from MIDI buffer and transmit them via USB.
*/
static void line6_midi_transmit(struct snd_rawmidi_substream *substream)
{
	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;
	struct snd_line6_midi *line6midi = line6->line6midi;
	struct MidiBuffer *mb = &line6midi->midibuf_out;
	unsigned long flags;
	unsigned char chunk[line6->max_packet_size];
	int req, done;

	spin_lock_irqsave(&line6->line6midi->midi_transmit_lock, flags);

	for (;;) {
		req = min(line6_midibuf_bytes_free(mb), line6->max_packet_size);
		done = snd_rawmidi_transmit_peek(substream, chunk, req);

		if (done == 0)
			break;

#ifdef CONFIG_LINE6_USB_DUMP_MIDI
		line6_write_hexdump(line6, 's', chunk, done);
#endif
		line6_midibuf_write(mb, chunk, done);
		snd_rawmidi_transmit_ack(substream, done);
	}

	for (;;) {
		done = line6_midibuf_read(mb, chunk, line6->max_packet_size);

		if (done == 0)
			break;

		if (line6_midibuf_skip_message(mb, line6midi->midi_mask_transmit))
			continue;

		send_midi_async(line6, chunk, done);
	}

	spin_unlock_irqrestore(&line6->line6midi->midi_transmit_lock, flags);
}

/*
	Notification of completion of MIDI transmission.
*/
static void midi_sent(struct urb *urb)
{
	unsigned long flags;
	int status;
	int num;
	struct usb_line6 *line6 = (struct usb_line6 *)urb->context;

	status = urb->status;
	kfree(urb->transfer_buffer);
	usb_free_urb(urb);

	if (status == -ESHUTDOWN)
		return;

	spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags);
	num = --line6->line6midi->num_active_send_urbs;

	if (num == 0) {
		line6_midi_transmit(line6->line6midi->substream_transmit);
		num = line6->line6midi->num_active_send_urbs;
	}

	if (num == 0)
		wake_up(&line6->line6midi->send_wait);

	spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags);
}

/*
	Send an asynchronous MIDI message.
	Assumes that line6->line6midi->send_urb_lock is held
	(i.e., this function is serialized).
*/
static int send_midi_async(struct usb_line6 *line6, unsigned char *data,
			   int length)
{
	struct urb *urb;
	int retval;
	unsigned char *transfer_buffer;

	urb = usb_alloc_urb(0, GFP_ATOMIC);

	if (urb == 0) {
		dev_err(line6->ifcdev, "Out of memory\n");
		return -ENOMEM;
	}

#ifdef CONFIG_LINE6_USB_DUMP_CTRL
	line6_write_hexdump(line6, 'S', data, length);
#endif

	transfer_buffer = kmalloc(length, GFP_ATOMIC);

	if (transfer_buffer == 0) {
		usb_free_urb(urb);
		dev_err(line6->ifcdev, "Out of memory\n");
		return -ENOMEM;
	}

	memcpy(transfer_buffer, data, length);
	usb_fill_int_urb(urb, line6->usbdev,
			 usb_sndbulkpipe(line6->usbdev,
					 line6->ep_control_write),
			 transfer_buffer, length, midi_sent, line6,
			 line6->interval);
	urb->actual_length = 0;
	retval = usb_submit_urb(urb, GFP_ATOMIC);

	if (retval < 0) {
		dev_err(line6->ifcdev, "usb_submit_urb failed\n");
		usb_free_urb(urb);
		return -EINVAL;
	}

	++line6->line6midi->num_active_send_urbs;

	switch (line6->usbdev->descriptor.idProduct) {
	case LINE6_DEVID_BASSPODXT:
	case LINE6_DEVID_BASSPODXTLIVE:
	case LINE6_DEVID_BASSPODXTPRO:
	case LINE6_DEVID_PODXT:
	case LINE6_DEVID_PODXTLIVE:
	case LINE6_DEVID_PODXTPRO:
	case LINE6_DEVID_POCKETPOD:
		line6_pod_midi_postprocess((struct usb_line6_pod *)line6, data,
					   length);
		break;

	default:
		MISSING_CASE;
	}

	return 0;
}

static int line6_midi_output_open(struct snd_rawmidi_substream *substream)
{
	return 0;
}

static int line6_midi_output_close(struct snd_rawmidi_substream *substream)
{
	return 0;
}

static void line6_midi_output_trigger(struct snd_rawmidi_substream *substream,
				      int up)
{
	unsigned long flags;
	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;

	line6->line6midi->substream_transmit = substream;
	spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags);

	if (line6->line6midi->num_active_send_urbs == 0)
		line6_midi_transmit(substream);

	spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags);
}

static void line6_midi_output_drain(struct snd_rawmidi_substream *substream)
{
	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;
	struct snd_line6_midi *midi = line6->line6midi;
	wait_event_interruptible(midi->send_wait, midi->num_active_send_urbs == 0);
}

static int line6_midi_input_open(struct snd_rawmidi_substream *substream)
{
	return 0;
}

static int line6_midi_input_close(struct snd_rawmidi_substream *substream)
{
	return 0;
}

static void line6_midi_input_trigger(struct snd_rawmidi_substream *substream,
				     int up)
{
	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;

	if (up)
		line6->line6midi->substream_receive = substream;
	else
		line6->line6midi->substream_receive = 0;
}

static struct snd_rawmidi_ops line6_midi_output_ops = {
	.open = line6_midi_output_open,
	.close = line6_midi_output_close,
	.trigger = line6_midi_output_trigger,
	.drain = line6_midi_output_drain,
};

static struct snd_rawmidi_ops line6_midi_input_ops = {
	.open = line6_midi_input_open,
	.close = line6_midi_input_close,
	.trigger = line6_midi_input_trigger,
};

/*
	Cleanup the Line6 MIDI device.
*/
static void line6_cleanup_midi(struct snd_rawmidi *rmidi)
{
}

/* Create a MIDI device */
static int snd_line6_new_midi(struct snd_line6_midi *line6midi)
{
	struct snd_rawmidi *rmidi;
	int err;

	err = snd_rawmidi_new(line6midi->line6->card, "Line6 MIDI", 0, 1, 1,
			      &rmidi);
	if (err < 0)
		return err;

	rmidi->private_data = line6midi;
	rmidi->private_free = line6_cleanup_midi;
	strcpy(rmidi->id, line6midi->line6->properties->id);
	strcpy(rmidi->name, line6midi->line6->properties->name);

	rmidi->info_flags =
		SNDRV_RAWMIDI_INFO_OUTPUT |
		SNDRV_RAWMIDI_INFO_INPUT |
		SNDRV_RAWMIDI_INFO_DUPLEX;

	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
			    &line6_midi_output_ops);
	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
			    &line6_midi_input_ops);
	return 0;
}

/*
	"read" request on "midi_mask_transmit" special file.
*/
static ssize_t midi_get_midi_mask_transmit(struct device *dev,
					   struct device_attribute *attr,
					   char *buf)
{
	struct usb_interface *interface = to_usb_interface(dev);
	struct usb_line6 *line6 = usb_get_intfdata(interface);
	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_transmit);
}

/*
	"write" request on "midi_mask" special file.
*/
static ssize_t midi_set_midi_mask_transmit(struct device *dev,
					   struct device_attribute *attr,
					   const char *buf, size_t count)
{
	struct usb_interface *interface = to_usb_interface(dev);
	struct usb_line6 *line6 = usb_get_intfdata(interface);
	unsigned long value;
	int ret;

	ret = strict_strtoul(buf, 10, &value);
	if (ret)
		return ret;

	line6->line6midi->midi_mask_transmit = value;
	return count;
}

/*
	"read" request on "midi_mask_receive" special file.
*/
static ssize_t midi_get_midi_mask_receive(struct device *dev,
					  struct device_attribute *attr,
					  char *buf)
{
	struct usb_interface *interface = to_usb_interface(dev);
	struct usb_line6 *line6 = usb_get_intfdata(interface);
	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_receive);
}

/*
	"write" request on "midi_mask" special file.
*/
static ssize_t midi_set_midi_mask_receive(struct device *dev,
					  struct device_attribute *attr,
					  const char *buf, size_t count)
{
	struct usb_interface *interface = to_usb_interface(dev);
	struct usb_line6 *line6 = usb_get_intfdata(interface);
	unsigned long value;
	int ret;

	ret = strict_strtoul(buf, 10, &value);
	if (ret)
		return ret;

	line6->line6midi->midi_mask_receive = value;
	return count;
}

static DEVICE_ATTR(midi_mask_transmit, S_IWUGO | S_IRUGO, midi_get_midi_mask_transmit, midi_set_midi_mask_transmit);
static DEVICE_ATTR(midi_mask_receive, S_IWUGO | S_IRUGO, midi_get_midi_mask_receive, midi_set_midi_mask_receive);

/* MIDI device destructor */
static int snd_line6_midi_free(struct snd_device *device)
{
	struct snd_line6_midi *line6midi = device->device_data;
	device_remove_file(line6midi->line6->ifcdev, &dev_attr_midi_mask_transmit);
	device_remove_file(line6midi->line6->ifcdev, &dev_attr_midi_mask_receive);
	line6_midibuf_destroy(&line6midi->midibuf_in);
	line6_midibuf_destroy(&line6midi->midibuf_out);
	return 0;
}

/*
	Initialize the Line6 MIDI subsystem.
*/
int line6_init_midi(struct usb_line6 *line6)
{
	static struct snd_device_ops midi_ops = {
		.dev_free = snd_line6_midi_free,
	};

	int err;
	struct snd_line6_midi *line6midi;

	if (!(line6->properties->capabilities & LINE6_BIT_CONTROL))
		return 0;  /* skip MIDI initialization and report success */

	line6midi = kzalloc(sizeof(struct snd_line6_midi), GFP_KERNEL);

	if (line6midi == NULL)
		return -ENOMEM;

	err = line6_midibuf_init(&line6midi->midibuf_in, MIDI_BUFFER_SIZE, 0);
	if (err < 0)
		return err;

	err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1);
	if (err < 0)
		return err;

	line6midi->line6 = line6;
	line6midi->midi_mask_transmit = 1;
	line6midi->midi_mask_receive = 4;
	line6->line6midi = line6midi;

	err = snd_device_new(line6->card, SNDRV_DEV_RAWMIDI, line6midi,
			     &midi_ops);
	if (err < 0)
		return err;

	snd_card_set_dev(line6->card, line6->ifcdev);

	err = snd_line6_new_midi(line6midi);
	if (err < 0)
		return err;

	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_transmit);
	if (err < 0)
		return err;

	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_receive);
	if (err < 0)
		return err;

	init_waitqueue_head(&line6midi->send_wait);
	spin_lock_init(&line6midi->send_urb_lock);
	spin_lock_init(&line6midi->midi_transmit_lock);
	return 0;
}
Commit	Line	Data
705ececd	1	/*
1027f476	2	* Line6 Linux USB driver - 0.9.0
705ececd	3	*
1027f476	4	* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
705ececd MG	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License as
	8	* published by the Free Software Foundation, version 2.
	9	*
	10	*/
	11
5a0e3ad6	12	#include <linux/slab.h>
1027f476	13	#include <linux/usb.h>
705ececd MG	14	#include <sound/core.h>
	15	#include <sound/rawmidi.h>
	16
	17	#include "audio.h"
1027f476	18	#include "driver.h"
705ececd MG	19	#include "midi.h"
	20	#include "pod.h"
	21	#include "usbdefs.h"
	22
	23
d7e37336 GKH	24	#define line6_rawmidi_substream_midi(substream) \
d7e37336 GKH	25	((struct snd_line6_midi *)((substream)->rmidi->private_data))
705ececd MG	26
705ececd MG	27
d7e37336 GKH	28	static int send_midi_async(struct usb_line6 line6, unsigned char data,
d7e37336 GKH	29	int length);
705ececd MG	30
	31
	32	/*
	33	Pass data received via USB to MIDI.
	34	*/
d7e37336 GKH	35	void line6_midi_receive(struct usb_line6 line6, unsigned char data,
d7e37336 GKH	36	int length)
705ececd	37	{
d7e37336 GKH	38	if (line6->line6midi->substream_receive)
	39	snd_rawmidi_receive(line6->line6midi->substream_receive,
	40	data, length);
705ececd MG	41	}
	42
	43	/*
	44	Read data from MIDI buffer and transmit them via USB.
	45	*/
	46	static void line6_midi_transmit(struct snd_rawmidi_substream *substream)
	47	{
	48	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;
	49	struct snd_line6_midi *line6midi = line6->line6midi;
	50	struct MidiBuffer *mb = &line6midi->midibuf_out;
	51	unsigned long flags;
	52	unsigned char chunk[line6->max_packet_size];
	53	int req, done;
	54
	55	spin_lock_irqsave(&line6->line6midi->midi_transmit_lock, flags);
	56
d7e37336	57	for (;;) {
1027f476	58	req = min(line6_midibuf_bytes_free(mb), line6->max_packet_size);
705ececd MG	59	done = snd_rawmidi_transmit_peek(substream, chunk, req);
705ececd MG	60
d7e37336	61	if (done == 0)
705ececd MG	62	break;
705ececd MG	63
1027f476	64	#ifdef CONFIG_LINE6_USB_DUMP_MIDI
705ececd MG	65	line6_write_hexdump(line6, 's', chunk, done);
705ececd MG	66	#endif
1027f476	67	line6_midibuf_write(mb, chunk, done);
705ececd MG	68	snd_rawmidi_transmit_ack(substream, done);
	69	}
	70
d7e37336	71	for (;;) {
1027f476	72	done = line6_midibuf_read(mb, chunk, line6->max_packet_size);
705ececd	73
d7e37336	74	if (done == 0)
705ececd MG	75	break;
705ececd MG	76
1027f476	77	if (line6_midibuf_skip_message(mb, line6midi->midi_mask_transmit))
705ececd MG	78	continue;
	79
	80	send_midi_async(line6, chunk, done);
	81	}
	82
	83	spin_unlock_irqrestore(&line6->line6midi->midi_transmit_lock, flags);
	84	}
	85
	86	/*
	87	Notification of completion of MIDI transmission.
	88	*/
0c7ab158	89	static void midi_sent(struct urb *urb)
705ececd MG	90	{
	91	unsigned long flags;
	92	int status;
	93	int num;
	94	struct usb_line6 line6 = (struct usb_line6 )urb->context;
	95
	96	status = urb->status;
	97	kfree(urb->transfer_buffer);
	98	usb_free_urb(urb);
	99
d7e37336	100	if (status == -ESHUTDOWN)
705ececd MG	101	return;
	102
	103	spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags);
	104	num = --line6->line6midi->num_active_send_urbs;
	105
d7e37336	106	if (num == 0) {
705ececd MG	107	line6_midi_transmit(line6->line6midi->substream_transmit);
	108	num = line6->line6midi->num_active_send_urbs;
	109	}
	110
d7e37336	111	if (num == 0)
1027f476	112	wake_up(&line6->line6midi->send_wait);
705ececd MG	113
	114	spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags);
	115	}
	116
	117	/*
	118	Send an asynchronous MIDI message.
	119	Assumes that line6->line6midi->send_urb_lock is held
	120	(i.e., this function is serialized).
	121	*/
d7e37336 GKH	122	static int send_midi_async(struct usb_line6 line6, unsigned char data,
d7e37336 GKH	123	int length)
705ececd MG	124	{
	125	struct urb *urb;
	126	int retval;
	127	unsigned char *transfer_buffer;
	128
	129	urb = usb_alloc_urb(0, GFP_ATOMIC);
	130
d7e37336	131	if (urb == 0) {
705ececd MG	132	dev_err(line6->ifcdev, "Out of memory\n");
	133	return -ENOMEM;
	134	}
	135
1027f476	136	#ifdef CONFIG_LINE6_USB_DUMP_CTRL
705ececd MG	137	line6_write_hexdump(line6, 'S', data, length);
	138	#endif
	139
d7e37336	140	transfer_buffer = kmalloc(length, GFP_ATOMIC);
705ececd	141
d7e37336	142	if (transfer_buffer == 0) {
705ececd MG	143	usb_free_urb(urb);
	144	dev_err(line6->ifcdev, "Out of memory\n");
	145	return -ENOMEM;
	146	}
	147
	148	memcpy(transfer_buffer, data, length);
d7e37336 GKH	149	usb_fill_int_urb(urb, line6->usbdev,
	150	usb_sndbulkpipe(line6->usbdev,
	151	line6->ep_control_write),
	152	transfer_buffer, length, midi_sent, line6,
	153	line6->interval);
705ececd MG	154	urb->actual_length = 0;
	155	retval = usb_submit_urb(urb, GFP_ATOMIC);
	156
d7e37336	157	if (retval < 0) {
705ececd MG	158	dev_err(line6->ifcdev, "usb_submit_urb failed\n");
	159	usb_free_urb(urb);
	160	return -EINVAL;
	161	}
	162
	163	++line6->line6midi->num_active_send_urbs;
	164
d7e37336	165	switch (line6->usbdev->descriptor.idProduct) {
705ececd MG	166	case LINE6_DEVID_BASSPODXT:
	167	case LINE6_DEVID_BASSPODXTLIVE:
	168	case LINE6_DEVID_BASSPODXTPRO:
	169	case LINE6_DEVID_PODXT:
	170	case LINE6_DEVID_PODXTLIVE:
	171	case LINE6_DEVID_PODXTPRO:
	172	case LINE6_DEVID_POCKETPOD:
1027f476 MG	173	line6_pod_midi_postprocess((struct usb_line6_pod *)line6, data,
1027f476 MG	174	length);
705ececd MG	175	break;
	176
	177	default:
	178	MISSING_CASE;
	179	}
	180
	181	return 0;
	182	}
	183
	184	static int line6_midi_output_open(struct snd_rawmidi_substream *substream)
	185	{
	186	return 0;
	187	}
	188
	189	static int line6_midi_output_close(struct snd_rawmidi_substream *substream)
	190	{
	191	return 0;
	192	}
	193
d7e37336 GKH	194	static void line6_midi_output_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	195	int up)
705ececd MG	196	{
	197	unsigned long flags;
	198	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;
	199
	200	line6->line6midi->substream_transmit = substream;
	201	spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags);
	202
d7e37336	203	if (line6->line6midi->num_active_send_urbs == 0)
705ececd MG	204	line6_midi_transmit(substream);
	205
	206	spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags);
	207	}
	208
	209	static void line6_midi_output_drain(struct snd_rawmidi_substream *substream)
	210	{
	211	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;
1027f476 MG	212	struct snd_line6_midi *midi = line6->line6midi;
1027f476 MG	213	wait_event_interruptible(midi->send_wait, midi->num_active_send_urbs == 0);
705ececd MG	214	}
	215
	216	static int line6_midi_input_open(struct snd_rawmidi_substream *substream)
	217	{
	218	return 0;
	219	}
	220
	221	static int line6_midi_input_close(struct snd_rawmidi_substream *substream)
	222	{
	223	return 0;
	224	}
	225
d7e37336 GKH	226	static void line6_midi_input_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	227	int up)
705ececd MG	228	{
	229	struct usb_line6 *line6 = line6_rawmidi_substream_midi(substream)->line6;
	230
d7e37336	231	if (up)
705ececd MG	232	line6->line6midi->substream_receive = substream;
	233	else
	234	line6->line6midi->substream_receive = 0;
	235	}
	236
	237	static struct snd_rawmidi_ops line6_midi_output_ops = {
	238	.open = line6_midi_output_open,
	239	.close = line6_midi_output_close,
	240	.trigger = line6_midi_output_trigger,
	241	.drain = line6_midi_output_drain,
	242	};
	243
	244	static struct snd_rawmidi_ops line6_midi_input_ops = {
	245	.open = line6_midi_input_open,
	246	.close = line6_midi_input_close,
	247	.trigger = line6_midi_input_trigger,
	248	};
	249
	250	/*
	251	Cleanup the Line6 MIDI device.
	252	*/
	253	static void line6_cleanup_midi(struct snd_rawmidi *rmidi)
	254	{
	255	}
	256
	257	/* Create a MIDI device */
	258	static int snd_line6_new_midi(struct snd_line6_midi *line6midi)
	259	{
	260	struct snd_rawmidi *rmidi;
	261	int err;
	262
d7e37336 GKH	263	err = snd_rawmidi_new(line6midi->line6->card, "Line6 MIDI", 0, 1, 1,
	264	&rmidi);
	265	if (err < 0)
705ececd MG	266	return err;
	267
	268	rmidi->private_data = line6midi;
	269	rmidi->private_free = line6_cleanup_midi;
1027f476	270	strcpy(rmidi->id, line6midi->line6->properties->id);
705ececd MG	271	strcpy(rmidi->name, line6midi->line6->properties->name);
	272
	273	rmidi->info_flags =
	274	SNDRV_RAWMIDI_INFO_OUTPUT \|
	275	SNDRV_RAWMIDI_INFO_INPUT \|
	276	SNDRV_RAWMIDI_INFO_DUPLEX;
	277
d7e37336 GKH	278	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
	279	&line6_midi_output_ops);
	280	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
	281	&line6_midi_input_ops);
705ececd MG	282	return 0;
	283	}
	284
	285	/*
	286	"read" request on "midi_mask_transmit" special file.
	287	*/
77491e52 GKH	288	static ssize_t midi_get_midi_mask_transmit(struct device *dev,
	289	struct device_attribute *attr,
	290	char *buf)
705ececd MG	291	{
	292	struct usb_interface *interface = to_usb_interface(dev);
	293	struct usb_line6 *line6 = usb_get_intfdata(interface);
	294	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_transmit);
	295	}
	296
	297	/*
	298	"write" request on "midi_mask" special file.
	299	*/
77491e52 GKH	300	static ssize_t midi_set_midi_mask_transmit(struct device *dev,
	301	struct device_attribute *attr,
	302	const char *buf, size_t count)
705ececd MG	303	{
	304	struct usb_interface *interface = to_usb_interface(dev);
	305	struct usb_line6 *line6 = usb_get_intfdata(interface);
334a33d8 SB	306	unsigned long value;
	307	int ret;
	308
	309	ret = strict_strtoul(buf, 10, &value);
	310	if (ret)
	311	return ret;
	312
705ececd MG	313	line6->line6midi->midi_mask_transmit = value;
	314	return count;
	315	}
	316
	317	/*
	318	"read" request on "midi_mask_receive" special file.
	319	*/
77491e52 GKH	320	static ssize_t midi_get_midi_mask_receive(struct device *dev,
	321	struct device_attribute *attr,
	322	char *buf)
705ececd MG	323	{
	324	struct usb_interface *interface = to_usb_interface(dev);
	325	struct usb_line6 *line6 = usb_get_intfdata(interface);
	326	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_receive);
	327	}
	328
	329	/*
	330	"write" request on "midi_mask" special file.
	331	*/
77491e52 GKH	332	static ssize_t midi_set_midi_mask_receive(struct device *dev,
	333	struct device_attribute *attr,
	334	const char *buf, size_t count)
705ececd MG	335	{
	336	struct usb_interface *interface = to_usb_interface(dev);
	337	struct usb_line6 *line6 = usb_get_intfdata(interface);
334a33d8 SB	338	unsigned long value;
	339	int ret;
	340
	341	ret = strict_strtoul(buf, 10, &value);
	342	if (ret)
	343	return ret;
	344
705ececd MG	345	line6->line6midi->midi_mask_receive = value;
	346	return count;
	347	}
	348
	349	static DEVICE_ATTR(midi_mask_transmit, S_IWUGO \| S_IRUGO, midi_get_midi_mask_transmit, midi_set_midi_mask_transmit);
	350	static DEVICE_ATTR(midi_mask_receive, S_IWUGO \| S_IRUGO, midi_get_midi_mask_receive, midi_set_midi_mask_receive);
	351
	352	/* MIDI device destructor */
	353	static int snd_line6_midi_free(struct snd_device *device)
	354	{
	355	struct snd_line6_midi *line6midi = device->device_data;
	356	device_remove_file(line6midi->line6->ifcdev, &dev_attr_midi_mask_transmit);
	357	device_remove_file(line6midi->line6->ifcdev, &dev_attr_midi_mask_receive);
1027f476 MG	358	line6_midibuf_destroy(&line6midi->midibuf_in);
1027f476 MG	359	line6_midibuf_destroy(&line6midi->midibuf_out);
705ececd MG	360	return 0;
	361	}
	362
	363	/*
	364	Initialize the Line6 MIDI subsystem.
	365	*/
	366	int line6_init_midi(struct usb_line6 *line6)
	367	{
	368	static struct snd_device_ops midi_ops = {
	369	.dev_free = snd_line6_midi_free,
	370	};
	371
	372	int err;
	373	struct snd_line6_midi *line6midi;
	374
d7e37336	375	if (!(line6->properties->capabilities & LINE6_BIT_CONTROL))
705ececd MG	376	return 0; /* skip MIDI initialization and report success */
	377
	378	line6midi = kzalloc(sizeof(struct snd_line6_midi), GFP_KERNEL);
	379
d7e37336	380	if (line6midi == NULL)
705ececd MG	381	return -ENOMEM;
705ececd MG	382
1027f476	383	err = line6_midibuf_init(&line6midi->midibuf_in, MIDI_BUFFER_SIZE, 0);
d7e37336	384	if (err < 0)
705ececd MG	385	return err;
705ececd MG	386
1027f476	387	err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1);
d7e37336	388	if (err < 0)
705ececd MG	389	return err;
	390
	391	line6midi->line6 = line6;
	392	line6midi->midi_mask_transmit = 1;
	393	line6midi->midi_mask_receive = 4;
	394	line6->line6midi = line6midi;
	395
d7e37336 GKH	396	err = snd_device_new(line6->card, SNDRV_DEV_RAWMIDI, line6midi,
	397	&midi_ops);
	398	if (err < 0)
705ececd MG	399	return err;
	400
	401	snd_card_set_dev(line6->card, line6->ifcdev);
	402
d7e37336 GKH	403	err = snd_line6_new_midi(line6midi);
d7e37336 GKH	404	if (err < 0)
705ececd MG	405	return err;
705ececd MG	406
d7e37336 GKH	407	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_transmit);
d7e37336 GKH	408	if (err < 0)
705ececd MG	409	return err;
705ececd MG	410
d7e37336 GKH	411	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_receive);
d7e37336 GKH	412	if (err < 0)
705ececd MG	413	return err;
	414
	415	init_waitqueue_head(&line6midi->send_wait);
	416	spin_lock_init(&line6midi->send_urb_lock);
	417	spin_lock_init(&line6midi->midi_transmit_lock);
	418	return 0;
	419	}