[GitHub/mt8127/android_kernel_alcatel_ttab.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;
	}
#ifdef CONFIG_LINE6_USB_DUMP_CTRL
	line6_write_hexdump(line6, 'S', data, length);
#endif

	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	}
1027f476	134	#ifdef CONFIG_LINE6_USB_DUMP_CTRL
705ececd MG	135	line6_write_hexdump(line6, 'S', data, length);
	136	#endif
	137
cff86387	138	transfer_buffer = kmemdup(data, length, GFP_ATOMIC);
705ececd	139
597a1e7c	140	if (transfer_buffer == NULL) {
705ececd MG	141	usb_free_urb(urb);
	142	dev_err(line6->ifcdev, "Out of memory\n");
	143	return -ENOMEM;
	144	}
	145
d7e37336 GKH	146	usb_fill_int_urb(urb, line6->usbdev,
	147	usb_sndbulkpipe(line6->usbdev,
	148	line6->ep_control_write),
	149	transfer_buffer, length, midi_sent, line6,
	150	line6->interval);
705ececd MG	151	urb->actual_length = 0;
	152	retval = usb_submit_urb(urb, GFP_ATOMIC);
	153
d7e37336	154	if (retval < 0) {
705ececd MG	155	dev_err(line6->ifcdev, "usb_submit_urb failed\n");
	156	usb_free_urb(urb);
	157	return -EINVAL;
	158	}
	159
	160	++line6->line6midi->num_active_send_urbs;
	161
d7e37336	162	switch (line6->usbdev->descriptor.idProduct) {
705ececd MG	163	case LINE6_DEVID_BASSPODXT:
	164	case LINE6_DEVID_BASSPODXTLIVE:
	165	case LINE6_DEVID_BASSPODXTPRO:
	166	case LINE6_DEVID_PODXT:
	167	case LINE6_DEVID_PODXTLIVE:
	168	case LINE6_DEVID_PODXTPRO:
	169	case LINE6_DEVID_POCKETPOD:
1027f476 MG	170	line6_pod_midi_postprocess((struct usb_line6_pod *)line6, data,
1027f476 MG	171	length);
705ececd MG	172	break;
705ececd MG	173
e1a164d7	174	case LINE6_DEVID_VARIAX:
1dc403ff	175	case LINE6_DEVID_PODHD300:
4c6fb5fc	176	case LINE6_DEVID_PODHD500:
e1a164d7 MG	177	break;
e1a164d7 MG	178
705ececd MG	179	default:
	180	MISSING_CASE;
	181	}
	182
	183	return 0;
	184	}
	185
	186	static int line6_midi_output_open(struct snd_rawmidi_substream *substream)
	187	{
	188	return 0;
	189	}
	190
	191	static int line6_midi_output_close(struct snd_rawmidi_substream *substream)
	192	{
	193	return 0;
	194	}
	195
d7e37336 GKH	196	static void line6_midi_output_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	197	int up)
705ececd MG	198	{
705ececd MG	199	unsigned long flags;
e1a164d7 MG	200	struct usb_line6 *line6 =
e1a164d7 MG	201	line6_rawmidi_substream_midi(substream)->line6;
705ececd MG	202
	203	line6->line6midi->substream_transmit = substream;
	204	spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags);
	205
d7e37336	206	if (line6->line6midi->num_active_send_urbs == 0)
705ececd MG	207	line6_midi_transmit(substream);
	208
	209	spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags);
	210	}
	211
	212	static void line6_midi_output_drain(struct snd_rawmidi_substream *substream)
	213	{
e1a164d7 MG	214	struct usb_line6 *line6 =
e1a164d7 MG	215	line6_rawmidi_substream_midi(substream)->line6;
1027f476	216	struct snd_line6_midi *midi = line6->line6midi;
e1a164d7 MG	217	wait_event_interruptible(midi->send_wait,
e1a164d7 MG	218	midi->num_active_send_urbs == 0);
705ececd MG	219	}
	220
	221	static int line6_midi_input_open(struct snd_rawmidi_substream *substream)
	222	{
	223	return 0;
	224	}
	225
	226	static int line6_midi_input_close(struct snd_rawmidi_substream *substream)
	227	{
	228	return 0;
	229	}
	230
d7e37336 GKH	231	static void line6_midi_input_trigger(struct snd_rawmidi_substream *substream,
d7e37336 GKH	232	int up)
705ececd	233	{
e1a164d7 MG	234	struct usb_line6 *line6 =
e1a164d7 MG	235	line6_rawmidi_substream_midi(substream)->line6;
705ececd	236
d7e37336	237	if (up)
705ececd MG	238	line6->line6midi->substream_receive = substream;
	239	else
	240	line6->line6midi->substream_receive = 0;
	241	}
	242
	243	static struct snd_rawmidi_ops line6_midi_output_ops = {
	244	.open = line6_midi_output_open,
	245	.close = line6_midi_output_close,
	246	.trigger = line6_midi_output_trigger,
	247	.drain = line6_midi_output_drain,
	248	};
	249
	250	static struct snd_rawmidi_ops line6_midi_input_ops = {
	251	.open = line6_midi_input_open,
	252	.close = line6_midi_input_close,
	253	.trigger = line6_midi_input_trigger,
	254	};
	255
	256	/*
	257	Cleanup the Line6 MIDI device.
	258	*/
	259	static void line6_cleanup_midi(struct snd_rawmidi *rmidi)
	260	{
	261	}
	262
	263	/* Create a MIDI device */
	264	static int snd_line6_new_midi(struct snd_line6_midi *line6midi)
	265	{
	266	struct snd_rawmidi *rmidi;
	267	int err;
	268
d7e37336 GKH	269	err = snd_rawmidi_new(line6midi->line6->card, "Line6 MIDI", 0, 1, 1,
	270	&rmidi);
	271	if (err < 0)
705ececd MG	272	return err;
	273
	274	rmidi->private_data = line6midi;
	275	rmidi->private_free = line6_cleanup_midi;
1027f476	276	strcpy(rmidi->id, line6midi->line6->properties->id);
705ececd MG	277	strcpy(rmidi->name, line6midi->line6->properties->name);
	278
	279	rmidi->info_flags =
e1a164d7 MG	280	SNDRV_RAWMIDI_INFO_OUTPUT \|
e1a164d7 MG	281	SNDRV_RAWMIDI_INFO_INPUT \| SNDRV_RAWMIDI_INFO_DUPLEX;
705ececd	282
d7e37336 GKH	283	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
	284	&line6_midi_output_ops);
	285	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
	286	&line6_midi_input_ops);
705ececd MG	287	return 0;
	288	}
	289
	290	/*
	291	"read" request on "midi_mask_transmit" special file.
	292	*/
77491e52 GKH	293	static ssize_t midi_get_midi_mask_transmit(struct device *dev,
	294	struct device_attribute *attr,
	295	char *buf)
705ececd MG	296	{
	297	struct usb_interface *interface = to_usb_interface(dev);
	298	struct usb_line6 *line6 = usb_get_intfdata(interface);
	299	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_transmit);
	300	}
	301
	302	/*
	303	"write" request on "midi_mask" special file.
	304	*/
77491e52 GKH	305	static ssize_t midi_set_midi_mask_transmit(struct device *dev,
	306	struct device_attribute *attr,
	307	const char *buf, size_t count)
705ececd MG	308	{
	309	struct usb_interface *interface = to_usb_interface(dev);
	310	struct usb_line6 *line6 = usb_get_intfdata(interface);
4d85fae0	311	unsigned short value;
334a33d8 SB	312	int ret;
334a33d8 SB	313
4d85fae0	314	ret = kstrtou16(buf, 10, &value);
334a33d8 SB	315	if (ret)
	316	return ret;
	317
705ececd MG	318	line6->line6midi->midi_mask_transmit = value;
	319	return count;
	320	}
	321
	322	/*
	323	"read" request on "midi_mask_receive" special file.
	324	*/
77491e52 GKH	325	static ssize_t midi_get_midi_mask_receive(struct device *dev,
	326	struct device_attribute *attr,
	327	char *buf)
705ececd MG	328	{
	329	struct usb_interface *interface = to_usb_interface(dev);
	330	struct usb_line6 *line6 = usb_get_intfdata(interface);
	331	return sprintf(buf, "%d\n", line6->line6midi->midi_mask_receive);
	332	}
	333
	334	/*
	335	"write" request on "midi_mask" special file.
	336	*/
77491e52 GKH	337	static ssize_t midi_set_midi_mask_receive(struct device *dev,
	338	struct device_attribute *attr,
	339	const char *buf, size_t count)
705ececd MG	340	{
	341	struct usb_interface *interface = to_usb_interface(dev);
	342	struct usb_line6 *line6 = usb_get_intfdata(interface);
251c3948	343	unsigned short value;
334a33d8 SB	344	int ret;
334a33d8 SB	345
251c3948	346	ret = kstrtou16(buf, 10, &value);
334a33d8 SB	347	if (ret)
	348	return ret;
	349
705ececd MG	350	line6->line6midi->midi_mask_receive = value;
	351	return count;
	352	}
	353
a3a972a0	354	static DEVICE_ATTR(midi_mask_transmit, S_IWUSR \| S_IRUGO,
e1a164d7	355	midi_get_midi_mask_transmit, midi_set_midi_mask_transmit);
a3a972a0	356	static DEVICE_ATTR(midi_mask_receive, S_IWUSR \| S_IRUGO,
e1a164d7	357	midi_get_midi_mask_receive, midi_set_midi_mask_receive);
705ececd MG	358
	359	/* MIDI device destructor */
	360	static int snd_line6_midi_free(struct snd_device *device)
	361	{
	362	struct snd_line6_midi *line6midi = device->device_data;
e1a164d7 MG	363	device_remove_file(line6midi->line6->ifcdev,
	364	&dev_attr_midi_mask_transmit);
	365	device_remove_file(line6midi->line6->ifcdev,
	366	&dev_attr_midi_mask_receive);
1027f476 MG	367	line6_midibuf_destroy(&line6midi->midibuf_in);
1027f476 MG	368	line6_midibuf_destroy(&line6midi->midibuf_out);
705ececd MG	369	return 0;
	370	}
	371
	372	/*
	373	Initialize the Line6 MIDI subsystem.
	374	*/
	375	int line6_init_midi(struct usb_line6 *line6)
	376	{
	377	static struct snd_device_ops midi_ops = {
	378	.dev_free = snd_line6_midi_free,
	379	};
	380
	381	int err;
	382	struct snd_line6_midi *line6midi;
	383
027360c5 GKH	384	if (!(line6->properties->capabilities & LINE6_BIT_CONTROL)) {
	385	/* skip MIDI initialization and report success */
	386	return 0;
	387	}
705ececd MG	388
	389	line6midi = kzalloc(sizeof(struct snd_line6_midi), GFP_KERNEL);
	390
d7e37336	391	if (line6midi == NULL)
705ececd MG	392	return -ENOMEM;
705ececd MG	393
1027f476	394	err = line6_midibuf_init(&line6midi->midibuf_in, MIDI_BUFFER_SIZE, 0);
982d6ab5 JJ	395	if (err < 0) {
982d6ab5 JJ	396	kfree(line6midi);
705ececd	397	return err;
982d6ab5	398	}
705ececd	399
1027f476	400	err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1);
982d6ab5 JJ	401	if (err < 0) {
	402	kfree(line6midi->midibuf_in.buf);
	403	kfree(line6midi);
705ececd	404	return err;
982d6ab5	405	}
705ececd MG	406
705ececd MG	407	line6midi->line6 = line6;
4c6fb5fc	408
bc8fa144	409	switch (line6->product) {
4c6fb5fc MG	410	case LINE6_DEVID_PODHD300:
	411	case LINE6_DEVID_PODHD500:
	412	line6midi->midi_mask_transmit = 1;
	413	line6midi->midi_mask_receive = 1;
	414	break;
	415
	416	default:
	417	line6midi->midi_mask_transmit = 1;
	418	line6midi->midi_mask_receive = 4;
	419	}
	420
705ececd MG	421	line6->line6midi = line6midi;
705ececd MG	422
d7e37336 GKH	423	err = snd_device_new(line6->card, SNDRV_DEV_RAWMIDI, line6midi,
	424	&midi_ops);
	425	if (err < 0)
705ececd MG	426	return err;
	427
	428	snd_card_set_dev(line6->card, line6->ifcdev);
	429
d7e37336 GKH	430	err = snd_line6_new_midi(line6midi);
d7e37336 GKH	431	if (err < 0)
705ececd MG	432	return err;
705ececd MG	433
d7e37336 GKH	434	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_transmit);
d7e37336 GKH	435	if (err < 0)
705ececd MG	436	return err;
705ececd MG	437
d7e37336 GKH	438	err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_receive);
d7e37336 GKH	439	if (err < 0)
705ececd MG	440	return err;
	441
	442	init_waitqueue_head(&line6midi->send_wait);
	443	spin_lock_init(&line6midi->send_urb_lock);
	444	spin_lock_init(&line6midi->midi_transmit_lock);
	445	return 0;
	446	}