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

/*
 * Line6 Linux USB driver - 0.9.1beta
 *
 * 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;

	case LINE6_DEVID_VARIAX:
		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_IWUSR | S_IRUGO,
		   midi_get_midi_mask_transmit, midi_set_midi_mask_transmit);
static DEVICE_ATTR(midi_mask_receive, S_IWUSR | 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)) {
		/* skip MIDI initialization and report success */
		return 0;
	}

	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	/*
e1a164d7	2	* Line6 Linux USB driver - 0.9.1beta
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
d7e37336 GKH	23	#define line6_rawmidi_substream_midi(substream) \
d7e37336 GKH	24	((struct snd_line6_midi *)((substream)->rmidi->private_data))
705ececd	25
d7e37336 GKH	26	static int send_midi_async(struct usb_line6 line6, unsigned char data,
d7e37336 GKH	27	int length);
705ececd	28
705ececd MG	29	/*
	30	Pass data received via USB to MIDI.
	31	*/
d7e37336 GKH	32	void line6_midi_receive(struct usb_line6 line6, unsigned char data,
d7e37336 GKH	33	int length)
705ececd	34	{
d7e37336 GKH	35	if (line6->line6midi->substream_receive)
	36	snd_rawmidi_receive(line6->line6midi->substream_receive,
	37	data, length);
705ececd MG	38	}
	39
	40	/*
	41	Read data from MIDI buffer and transmit them via USB.
	42	*/
	43	static void line6_midi_transmit(struct snd_rawmidi_substream *substream)
	44	{
e1a164d7 MG	45	struct usb_line6 *line6 =
e1a164d7 MG	46	line6_rawmidi_substream_midi(substream)->line6;
705ececd MG	47	struct snd_line6_midi *line6midi = line6->line6midi;
	48	struct MidiBuffer *mb = &line6midi->midibuf_out;
	49	unsigned long flags;
	50	unsigned char chunk[line6->max_packet_size];
	51	int req, done;
	52
	53	spin_lock_irqsave(&line6->line6midi->midi_transmit_lock, flags);
	54
d7e37336	55	for (;;) {
1027f476	56	req = min(line6_midibuf_bytes_free(mb), line6->max_packet_size);
705ececd MG	57	done = snd_rawmidi_transmit_peek(substream, chunk, req);
705ececd MG	58
d7e37336	59	if (done == 0)
705ececd MG	60	break;
705ececd MG	61
1027f476	62	#ifdef CONFIG_LINE6_USB_DUMP_MIDI
705ececd MG	63	line6_write_hexdump(line6, 's', chunk, done);
705ececd MG	64	#endif
1027f476	65	line6_midibuf_write(mb, chunk, done);
705ececd MG	66	snd_rawmidi_transmit_ack(substream, done);
	67	}
	68
d7e37336	69	for (;;) {
1027f476	70	done = line6_midibuf_read(mb, chunk, line6->max_packet_size);
705ececd	71
d7e37336	72	if (done == 0)
705ececd MG	73	break;
705ececd MG	74
e1a164d7 MG	75	if (line6_midibuf_skip_message
e1a164d7 MG	76	(mb, line6midi->midi_mask_transmit))
705ececd MG	77	continue;
	78
	79	send_midi_async(line6, chunk, done);
	80	}
	81
	82	spin_unlock_irqrestore(&line6->line6midi->midi_transmit_lock, flags);
	83	}
	84
	85	/*
	86	Notification of completion of MIDI transmission.
	87	*/
0c7ab158	88	static void midi_sent(struct urb *urb)
705ececd MG	89	{
	90	unsigned long flags;
	91	int status;
	92	int num;
	93	struct usb_line6 line6 = (struct usb_line6 )urb->context;
	94
	95	status = urb->status;
	96	kfree(urb->transfer_buffer);
	97	usb_free_urb(urb);
	98
d7e37336	99	if (status == -ESHUTDOWN)
705ececd MG	100	return;
	101
	102	spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags);
	103	num = --line6->line6midi->num_active_send_urbs;
	104
d7e37336	105	if (num == 0) {
705ececd MG	106	line6_midi_transmit(line6->line6midi->substream_transmit);
	107	num = line6->line6midi->num_active_send_urbs;
	108	}
	109
d7e37336	110	if (num == 0)
1027f476	111	wake_up(&line6->line6midi->send_wait);
705ececd MG	112
	113	spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags);
	114	}
	115
	116	/*
	117	Send an asynchronous MIDI message.
	118	Assumes that line6->line6midi->send_urb_lock is held
	119	(i.e., this function is serialized).
	120	*/
d7e37336 GKH	121	static int send_midi_async(struct usb_line6 line6, unsigned char data,
d7e37336 GKH	122	int length)
705ececd MG	123	{
	124	struct urb *urb;
	125	int retval;
	126	unsigned char *transfer_buffer;
	127
	128	urb = usb_alloc_urb(0, GFP_ATOMIC);
	129
d7e37336	130	if (urb == 0) {
705ececd MG	131	dev_err(line6->ifcdev, "Out of memory\n");
	132	return -ENOMEM;
	133	}
1027f476	134	#ifdef CONFIG_LINE6_USB_DUMP_CTRL
705ececd MG	135	line6_write_hexdump(line6, 'S', data, length);
	136	#endif
	137
d7e37336	138	transfer_buffer = kmalloc(length, GFP_ATOMIC);
705ececd	139
d7e37336	140	if (transfer_buffer == 0) {
705ececd MG	141	usb_free_urb(urb);
	142	dev_err(line6->ifcdev, "Out of memory\n");
	143	return -ENOMEM;
	144	}
	145
	146	memcpy(transfer_buffer, data, length);
d7e37336 GKH	147	usb_fill_int_urb(urb, line6->usbdev,
	148	usb_sndbulkpipe(line6->usbdev,
	149	line6->ep_control_write),
	150	transfer_buffer, length, midi_sent, line6,
	151	line6->interval);
705ececd MG	152	urb->actual_length = 0;
	153	retval = usb_submit_urb(urb, GFP_ATOMIC);
	154
d7e37336	155	if (retval < 0) {
705ececd MG	156	dev_err(line6->ifcdev, "usb_submit_urb failed\n");
	157	usb_free_urb(urb);
	158	return -EINVAL;
	159	}
	160
	161	++line6->line6midi->num_active_send_urbs;
	162
d7e37336	163	switch (line6->usbdev->descriptor.idProduct) {
705ececd MG	164	case LINE6_DEVID_BASSPODXT:
	165	case LINE6_DEVID_BASSPODXTLIVE:
	166	case LINE6_DEVID_BASSPODXTPRO:
	167	case LINE6_DEVID_PODXT:
	168	case LINE6_DEVID_PODXTLIVE:
	169	case LINE6_DEVID_PODXTPRO:
	170	case LINE6_DEVID_POCKETPOD:
1027f476 MG	171	line6_pod_midi_postprocess((struct usb_line6_pod *)line6, data,
1027f476 MG	172	length);
705ececd MG	173	break;
705ececd MG	174
e1a164d7 MG	175	case LINE6_DEVID_VARIAX:
	176	break;
	177
705ececd MG	178	default:
	179	MISSING_CASE;
	180	}
	181
	182	return 0;
	183	}
	184
	185	static int line6_midi_output_open(struct snd_rawmidi_substream *substream)
	186	{
	187	return 0;
	188	}
	189
	190	static int line6_midi_output_close(struct snd_rawmidi_substream *substream)
	191	{
	192	return 0;
	193	}
	194
d7e37336 GKH	195	static void line6_midi_output_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	196	int up)
705ececd MG	197	{
705ececd MG	198	unsigned long flags;
e1a164d7 MG	199	struct usb_line6 *line6 =
e1a164d7 MG	200	line6_rawmidi_substream_midi(substream)->line6;
705ececd MG	201
	202	line6->line6midi->substream_transmit = substream;
	203	spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags);
	204
d7e37336	205	if (line6->line6midi->num_active_send_urbs == 0)
705ececd MG	206	line6_midi_transmit(substream);
	207
	208	spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags);
	209	}
	210
	211	static void line6_midi_output_drain(struct snd_rawmidi_substream *substream)
	212	{
e1a164d7 MG	213	struct usb_line6 *line6 =
e1a164d7 MG	214	line6_rawmidi_substream_midi(substream)->line6;
1027f476	215	struct snd_line6_midi *midi = line6->line6midi;
e1a164d7 MG	216	wait_event_interruptible(midi->send_wait,
e1a164d7 MG	217	midi->num_active_send_urbs == 0);
705ececd MG	218	}
	219
	220	static int line6_midi_input_open(struct snd_rawmidi_substream *substream)
	221	{
	222	return 0;
	223	}
	224
	225	static int line6_midi_input_close(struct snd_rawmidi_substream *substream)
	226	{
	227	return 0;
	228	}
	229
d7e37336 GKH	230	static void line6_midi_input_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	231	int up)
705ececd	232	{
e1a164d7 MG	233	struct usb_line6 *line6 =
e1a164d7 MG	234	line6_rawmidi_substream_midi(substream)->line6;
705ececd	235
d7e37336	236	if (up)
705ececd MG	237	line6->line6midi->substream_receive = substream;
	238	else
	239	line6->line6midi->substream_receive = 0;
	240	}
	241
	242	static struct snd_rawmidi_ops line6_midi_output_ops = {
	243	.open = line6_midi_output_open,
	244	.close = line6_midi_output_close,
	245	.trigger = line6_midi_output_trigger,
	246	.drain = line6_midi_output_drain,
	247	};
	248
	249	static struct snd_rawmidi_ops line6_midi_input_ops = {
	250	.open = line6_midi_input_open,
	251	.close = line6_midi_input_close,
	252	.trigger = line6_midi_input_trigger,
	253	};
	254
	255	/*
	256	Cleanup the Line6 MIDI device.
	257	*/
	258	static void line6_cleanup_midi(struct snd_rawmidi *rmidi)
	259	{
	260	}
	261
	262	/* Create a MIDI device */
	263	static int snd_line6_new_midi(struct snd_line6_midi *line6midi)
	264	{
	265	struct snd_rawmidi *rmidi;
	266	int err;
	267
d7e37336 GKH	268	err = snd_rawmidi_new(line6midi->line6->card, "Line6 MIDI", 0, 1, 1,
	269	&rmidi);
	270	if (err < 0)
705ececd MG	271	return err;
	272
	273	rmidi->private_data = line6midi;
	274	rmidi->private_free = line6_cleanup_midi;
1027f476	275	strcpy(rmidi->id, line6midi->line6->properties->id);
705ececd MG	276	strcpy(rmidi->name, line6midi->line6->properties->name);
	277
	278	rmidi->info_flags =
e1a164d7 MG	279	SNDRV_RAWMIDI_INFO_OUTPUT \|
e1a164d7 MG	280	SNDRV_RAWMIDI_INFO_INPUT \| SNDRV_RAWMIDI_INFO_DUPLEX;
705ececd	281
d7e37336 GKH	282	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
	283	&line6_midi_output_ops);
	284	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
	285	&line6_midi_input_ops);
705ececd MG	286	return 0;
	287	}
	288
	289	/*
	290	"read" request on "midi_mask_transmit" special file.
	291	*/
77491e52 GKH	292	static ssize_t midi_get_midi_mask_transmit(struct device *dev,
	293	struct device_attribute *attr,
	294	char *buf)
705ececd MG	295	{
	296	struct usb_interface *interface = to_usb_interface(dev);
	297	struct usb_line6 *line6 = usb_get_intfdata(interface);
	298	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_transmit);
	299	}
	300
	301	/*
	302	"write" request on "midi_mask" special file.
	303	*/
77491e52 GKH	304	static ssize_t midi_set_midi_mask_transmit(struct device *dev,
	305	struct device_attribute *attr,
	306	const char *buf, size_t count)
705ececd MG	307	{
	308	struct usb_interface *interface = to_usb_interface(dev);
	309	struct usb_line6 *line6 = usb_get_intfdata(interface);
334a33d8 SB	310	unsigned long value;
	311	int ret;
	312
	313	ret = strict_strtoul(buf, 10, &value);
	314	if (ret)
	315	return ret;
	316
705ececd MG	317	line6->line6midi->midi_mask_transmit = value;
	318	return count;
	319	}
	320
	321	/*
	322	"read" request on "midi_mask_receive" special file.
	323	*/
77491e52 GKH	324	static ssize_t midi_get_midi_mask_receive(struct device *dev,
	325	struct device_attribute *attr,
	326	char *buf)
705ececd MG	327	{
	328	struct usb_interface *interface = to_usb_interface(dev);
	329	struct usb_line6 *line6 = usb_get_intfdata(interface);
	330	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_receive);
	331	}
	332
	333	/*
	334	"write" request on "midi_mask" special file.
	335	*/
77491e52 GKH	336	static ssize_t midi_set_midi_mask_receive(struct device *dev,
	337	struct device_attribute *attr,
	338	const char *buf, size_t count)
705ececd MG	339	{
	340	struct usb_interface *interface = to_usb_interface(dev);
	341	struct usb_line6 *line6 = usb_get_intfdata(interface);
334a33d8 SB	342	unsigned long value;
	343	int ret;
	344
	345	ret = strict_strtoul(buf, 10, &value);
	346	if (ret)
	347	return ret;
	348
705ececd MG	349	line6->line6midi->midi_mask_receive = value;
	350	return count;
	351	}
	352
a3a972a0	353	static DEVICE_ATTR(midi_mask_transmit, S_IWUSR \| S_IRUGO,
e1a164d7	354	midi_get_midi_mask_transmit, midi_set_midi_mask_transmit);
a3a972a0	355	static DEVICE_ATTR(midi_mask_receive, S_IWUSR \| S_IRUGO,
e1a164d7	356	midi_get_midi_mask_receive, midi_set_midi_mask_receive);
705ececd MG	357
	358	/* MIDI device destructor */
	359	static int snd_line6_midi_free(struct snd_device *device)
	360	{
	361	struct snd_line6_midi *line6midi = device->device_data;
e1a164d7 MG	362	device_remove_file(line6midi->line6->ifcdev,
	363	&dev_attr_midi_mask_transmit);
	364	device_remove_file(line6midi->line6->ifcdev,
	365	&dev_attr_midi_mask_receive);
1027f476 MG	366	line6_midibuf_destroy(&line6midi->midibuf_in);
1027f476 MG	367	line6_midibuf_destroy(&line6midi->midibuf_out);
705ececd MG	368	return 0;
	369	}
	370
	371	/*
	372	Initialize the Line6 MIDI subsystem.
	373	*/
	374	int line6_init_midi(struct usb_line6 *line6)
	375	{
	376	static struct snd_device_ops midi_ops = {
	377	.dev_free = snd_line6_midi_free,
	378	};
	379
	380	int err;
	381	struct snd_line6_midi *line6midi;
	382
027360c5 GKH	383	if (!(line6->properties->capabilities & LINE6_BIT_CONTROL)) {
	384	/* skip MIDI initialization and report success */
	385	return 0;
	386	}
705ececd MG	387
	388	line6midi = kzalloc(sizeof(struct snd_line6_midi), GFP_KERNEL);
	389
d7e37336	390	if (line6midi == NULL)
705ececd MG	391	return -ENOMEM;
705ececd MG	392
1027f476	393	err = line6_midibuf_init(&line6midi->midibuf_in, MIDI_BUFFER_SIZE, 0);
d7e37336	394	if (err < 0)
705ececd MG	395	return err;
705ececd MG	396
1027f476	397	err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1);
d7e37336	398	if (err < 0)
705ececd MG	399	return err;
	400
	401	line6midi->line6 = line6;
	402	line6midi->midi_mask_transmit = 1;
	403	line6midi->midi_mask_receive = 4;
	404	line6->line6midi = line6midi;
	405
d7e37336 GKH	406	err = snd_device_new(line6->card, SNDRV_DEV_RAWMIDI, line6midi,
	407	&midi_ops);
	408	if (err < 0)
705ececd MG	409	return err;
	410
	411	snd_card_set_dev(line6->card, line6->ifcdev);
	412
d7e37336 GKH	413	err = snd_line6_new_midi(line6midi);
d7e37336 GKH	414	if (err < 0)
705ececd MG	415	return err;
705ececd MG	416
d7e37336 GKH	417	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_transmit);
d7e37336 GKH	418	if (err < 0)
705ececd MG	419	return err;
705ececd MG	420
d7e37336 GKH	421	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_receive);
d7e37336 GKH	422	if (err < 0)
705ececd MG	423	return err;
	424
	425	init_waitqueue_head(&line6midi->send_wait);
	426	spin_lock_init(&line6midi->send_urb_lock);
	427	spin_lock_init(&line6midi->midi_transmit_lock);
	428	return 0;
	429	}