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

	transfer_buffer = kmemdup(data, length, GFP_ATOMIC);

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

	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:
	case LINE6_DEVID_PODHD300:
	case LINE6_DEVID_PODHD500:
		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 short value;
	int ret;

	ret = kstrtou16(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 short value;
	int ret;

	ret = kstrtou16(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) {
		kfree(line6midi);
		return err;
	}

	err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1);
	if (err < 0) {
		kfree(line6midi->midibuf_in.buf);
		kfree(line6midi);
		return err;
	}

	line6midi->line6 = line6;

	switch (line6->product) {
	case LINE6_DEVID_PODHD300:
	case LINE6_DEVID_PODHD500:
		line6midi->midi_mask_transmit = 1;
		line6midi->midi_mask_receive = 1;
		break;

	default:
		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
597a1e7c	130	if (urb == NULL) {
705ececd MG	131	dev_err(line6->ifcdev, "Out of memory\n");
	132	return -ENOMEM;
	133	}
705ececd	134
cff86387	135	transfer_buffer = kmemdup(data, length, GFP_ATOMIC);
705ececd	136
597a1e7c	137	if (transfer_buffer == NULL) {
705ececd MG	138	usb_free_urb(urb);
	139	dev_err(line6->ifcdev, "Out of memory\n");
	140	return -ENOMEM;
	141	}
	142
d7e37336 GKH	143	usb_fill_int_urb(urb, line6->usbdev,
	144	usb_sndbulkpipe(line6->usbdev,
	145	line6->ep_control_write),
	146	transfer_buffer, length, midi_sent, line6,
	147	line6->interval);
705ececd MG	148	urb->actual_length = 0;
	149	retval = usb_submit_urb(urb, GFP_ATOMIC);
	150
d7e37336	151	if (retval < 0) {
705ececd MG	152	dev_err(line6->ifcdev, "usb_submit_urb failed\n");
	153	usb_free_urb(urb);
	154	return -EINVAL;
	155	}
	156
	157	++line6->line6midi->num_active_send_urbs;
	158
d7e37336	159	switch (line6->usbdev->descriptor.idProduct) {
705ececd MG	160	case LINE6_DEVID_BASSPODXT:
	161	case LINE6_DEVID_BASSPODXTLIVE:
	162	case LINE6_DEVID_BASSPODXTPRO:
	163	case LINE6_DEVID_PODXT:
	164	case LINE6_DEVID_PODXTLIVE:
	165	case LINE6_DEVID_PODXTPRO:
	166	case LINE6_DEVID_POCKETPOD:
1027f476 MG	167	line6_pod_midi_postprocess((struct usb_line6_pod *)line6, data,
1027f476 MG	168	length);
705ececd MG	169	break;
705ececd MG	170
e1a164d7	171	case LINE6_DEVID_VARIAX:
1dc403ff	172	case LINE6_DEVID_PODHD300:
4c6fb5fc	173	case LINE6_DEVID_PODHD500:
e1a164d7 MG	174	break;
e1a164d7 MG	175
705ececd MG	176	default:
	177	MISSING_CASE;
	178	}
	179
	180	return 0;
	181	}
	182
	183	static int line6_midi_output_open(struct snd_rawmidi_substream *substream)
	184	{
	185	return 0;
	186	}
	187
	188	static int line6_midi_output_close(struct snd_rawmidi_substream *substream)
	189	{
	190	return 0;
	191	}
	192
d7e37336 GKH	193	static void line6_midi_output_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	194	int up)
705ececd MG	195	{
705ececd MG	196	unsigned long flags;
e1a164d7 MG	197	struct usb_line6 *line6 =
e1a164d7 MG	198	line6_rawmidi_substream_midi(substream)->line6;
705ececd MG	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	{
e1a164d7 MG	211	struct usb_line6 *line6 =
e1a164d7 MG	212	line6_rawmidi_substream_midi(substream)->line6;
1027f476	213	struct snd_line6_midi *midi = line6->line6midi;
e1a164d7 MG	214	wait_event_interruptible(midi->send_wait,
e1a164d7 MG	215	midi->num_active_send_urbs == 0);
705ececd MG	216	}
	217
	218	static int line6_midi_input_open(struct snd_rawmidi_substream *substream)
	219	{
	220	return 0;
	221	}
	222
	223	static int line6_midi_input_close(struct snd_rawmidi_substream *substream)
	224	{
	225	return 0;
	226	}
	227
d7e37336 GKH	228	static void line6_midi_input_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	229	int up)
705ececd	230	{
e1a164d7 MG	231	struct usb_line6 *line6 =
e1a164d7 MG	232	line6_rawmidi_substream_midi(substream)->line6;
705ececd	233
d7e37336	234	if (up)
705ececd MG	235	line6->line6midi->substream_receive = substream;
	236	else
	237	line6->line6midi->substream_receive = 0;
	238	}
	239
	240	static struct snd_rawmidi_ops line6_midi_output_ops = {
	241	.open = line6_midi_output_open,
	242	.close = line6_midi_output_close,
	243	.trigger = line6_midi_output_trigger,
	244	.drain = line6_midi_output_drain,
	245	};
	246
	247	static struct snd_rawmidi_ops line6_midi_input_ops = {
	248	.open = line6_midi_input_open,
	249	.close = line6_midi_input_close,
	250	.trigger = line6_midi_input_trigger,
	251	};
	252
	253	/*
	254	Cleanup the Line6 MIDI device.
	255	*/
	256	static void line6_cleanup_midi(struct snd_rawmidi *rmidi)
	257	{
	258	}
	259
	260	/* Create a MIDI device */
	261	static int snd_line6_new_midi(struct snd_line6_midi *line6midi)
	262	{
	263	struct snd_rawmidi *rmidi;
	264	int err;
	265
d7e37336 GKH	266	err = snd_rawmidi_new(line6midi->line6->card, "Line6 MIDI", 0, 1, 1,
	267	&rmidi);
	268	if (err < 0)
705ececd MG	269	return err;
	270
	271	rmidi->private_data = line6midi;
	272	rmidi->private_free = line6_cleanup_midi;
1027f476	273	strcpy(rmidi->id, line6midi->line6->properties->id);
705ececd MG	274	strcpy(rmidi->name, line6midi->line6->properties->name);
	275
	276	rmidi->info_flags =
e1a164d7 MG	277	SNDRV_RAWMIDI_INFO_OUTPUT \|
e1a164d7 MG	278	SNDRV_RAWMIDI_INFO_INPUT \| SNDRV_RAWMIDI_INFO_DUPLEX;
705ececd	279
d7e37336 GKH	280	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
	281	&line6_midi_output_ops);
	282	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
	283	&line6_midi_input_ops);
705ececd MG	284	return 0;
	285	}
	286
	287	/*
	288	"read" request on "midi_mask_transmit" special file.
	289	*/
77491e52 GKH	290	static ssize_t midi_get_midi_mask_transmit(struct device *dev,
	291	struct device_attribute *attr,
	292	char *buf)
705ececd MG	293	{
	294	struct usb_interface *interface = to_usb_interface(dev);
	295	struct usb_line6 *line6 = usb_get_intfdata(interface);
	296	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_transmit);
	297	}
	298
	299	/*
	300	"write" request on "midi_mask" special file.
	301	*/
77491e52 GKH	302	static ssize_t midi_set_midi_mask_transmit(struct device *dev,
	303	struct device_attribute *attr,
	304	const char *buf, size_t count)
705ececd MG	305	{
	306	struct usb_interface *interface = to_usb_interface(dev);
	307	struct usb_line6 *line6 = usb_get_intfdata(interface);
4d85fae0	308	unsigned short value;
334a33d8 SB	309	int ret;
334a33d8 SB	310
4d85fae0	311	ret = kstrtou16(buf, 10, &value);
334a33d8 SB	312	if (ret)
	313	return ret;
	314
705ececd MG	315	line6->line6midi->midi_mask_transmit = value;
	316	return count;
	317	}
	318
	319	/*
	320	"read" request on "midi_mask_receive" special file.
	321	*/
77491e52 GKH	322	static ssize_t midi_get_midi_mask_receive(struct device *dev,
	323	struct device_attribute *attr,
	324	char *buf)
705ececd MG	325	{
	326	struct usb_interface *interface = to_usb_interface(dev);
	327	struct usb_line6 *line6 = usb_get_intfdata(interface);
	328	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_receive);
	329	}
	330
	331	/*
	332	"write" request on "midi_mask" special file.
	333	*/
77491e52 GKH	334	static ssize_t midi_set_midi_mask_receive(struct device *dev,
	335	struct device_attribute *attr,
	336	const char *buf, size_t count)
705ececd MG	337	{
	338	struct usb_interface *interface = to_usb_interface(dev);
	339	struct usb_line6 *line6 = usb_get_intfdata(interface);
251c3948	340	unsigned short value;
334a33d8 SB	341	int ret;
334a33d8 SB	342
251c3948	343	ret = kstrtou16(buf, 10, &value);
334a33d8 SB	344	if (ret)
	345	return ret;
	346
705ececd MG	347	line6->line6midi->midi_mask_receive = value;
	348	return count;
	349	}
	350
a3a972a0	351	static DEVICE_ATTR(midi_mask_transmit, S_IWUSR \| S_IRUGO,
e1a164d7	352	midi_get_midi_mask_transmit, midi_set_midi_mask_transmit);
a3a972a0	353	static DEVICE_ATTR(midi_mask_receive, S_IWUSR \| S_IRUGO,
e1a164d7	354	midi_get_midi_mask_receive, midi_set_midi_mask_receive);
705ececd MG	355
	356	/* MIDI device destructor */
	357	static int snd_line6_midi_free(struct snd_device *device)
	358	{
	359	struct snd_line6_midi *line6midi = device->device_data;
e1a164d7 MG	360	device_remove_file(line6midi->line6->ifcdev,
	361	&dev_attr_midi_mask_transmit);
	362	device_remove_file(line6midi->line6->ifcdev,
	363	&dev_attr_midi_mask_receive);
1027f476 MG	364	line6_midibuf_destroy(&line6midi->midibuf_in);
1027f476 MG	365	line6_midibuf_destroy(&line6midi->midibuf_out);
705ececd MG	366	return 0;
	367	}
	368
	369	/*
	370	Initialize the Line6 MIDI subsystem.
	371	*/
	372	int line6_init_midi(struct usb_line6 *line6)
	373	{
	374	static struct snd_device_ops midi_ops = {
	375	.dev_free = snd_line6_midi_free,
	376	};
	377
	378	int err;
	379	struct snd_line6_midi *line6midi;
	380
027360c5 GKH	381	if (!(line6->properties->capabilities & LINE6_BIT_CONTROL)) {
	382	/* skip MIDI initialization and report success */
	383	return 0;
	384	}
705ececd MG	385
	386	line6midi = kzalloc(sizeof(struct snd_line6_midi), GFP_KERNEL);
	387
d7e37336	388	if (line6midi == NULL)
705ececd MG	389	return -ENOMEM;
705ececd MG	390
1027f476	391	err = line6_midibuf_init(&line6midi->midibuf_in, MIDI_BUFFER_SIZE, 0);
982d6ab5 JJ	392	if (err < 0) {
982d6ab5 JJ	393	kfree(line6midi);
705ececd	394	return err;
982d6ab5	395	}
705ececd	396
1027f476	397	err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1);
982d6ab5 JJ	398	if (err < 0) {
	399	kfree(line6midi->midibuf_in.buf);
	400	kfree(line6midi);
705ececd	401	return err;
982d6ab5	402	}
705ececd MG	403
705ececd MG	404	line6midi->line6 = line6;
4c6fb5fc	405
bc8fa144	406	switch (line6->product) {
4c6fb5fc MG	407	case LINE6_DEVID_PODHD300:
	408	case LINE6_DEVID_PODHD500:
	409	line6midi->midi_mask_transmit = 1;
	410	line6midi->midi_mask_receive = 1;
	411	break;
	412
	413	default:
	414	line6midi->midi_mask_transmit = 1;
	415	line6midi->midi_mask_receive = 4;
	416	}
	417
705ececd MG	418	line6->line6midi = line6midi;
705ececd MG	419
d7e37336 GKH	420	err = snd_device_new(line6->card, SNDRV_DEV_RAWMIDI, line6midi,
	421	&midi_ops);
	422	if (err < 0)
705ececd MG	423	return err;
	424
	425	snd_card_set_dev(line6->card, line6->ifcdev);
	426
d7e37336 GKH	427	err = snd_line6_new_midi(line6midi);
d7e37336 GKH	428	if (err < 0)
705ececd MG	429	return err;
705ececd MG	430
d7e37336 GKH	431	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_transmit);
d7e37336 GKH	432	if (err < 0)
705ececd MG	433	return err;
705ececd MG	434
d7e37336 GKH	435	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_receive);
d7e37336 GKH	436	if (err < 0)
705ececd MG	437	return err;
	438
	439	init_waitqueue_head(&line6midi->send_wait);
	440	spin_lock_init(&line6midi->send_urb_lock);
	441	spin_lock_init(&line6midi->midi_transmit_lock);
	442	return 0;
	443	}