Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2154 insertions, 0 deletions

diff --git a/drivers/usb/class/usb-midi.c b/drivers/usb/class/usb-midi.c
new file mode 100644
index 00000000000..5f8af35e763
--- /dev/null
+++ b/drivers/usb/class/usb-midi.c
@@ -0,0 +1,2154 @@
+/*
+  usb-midi.c  --  USB-MIDI driver
+
+  Copyright (C) 2001 
+      NAGANO Daisuke <breeze.nagano@nifty.ne.jp>
+
+  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; either version 2, or (at your option)
+  any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+  This driver is based on:
+    - 'Universal Serial Bus Device Class Definition for MIDI Device'
+    - linux/drivers/sound/es1371.c, linux/drivers/usb/audio.c
+    - alsa/lowlevel/pci/cs64xx.c
+    - umidi.c for NetBSD
+ */
+
+/* ------------------------------------------------------------------------- */
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/poll.h>
+#include <linux/sound.h>
+#include <linux/init.h>
+#include <asm/semaphore.h>
+
+#include "usb-midi.h"
+
+/* ------------------------------------------------------------------------- */
+
+/* More verbose on syslog */
+#undef MIDI_DEBUG
+
+#define MIDI_IN_BUFSIZ 1024
+
+#define HAVE_SUPPORT_USB_MIDI_CLASS
+
+#undef HAVE_SUPPORT_ALSA
+
+/* ------------------------------------------------------------------------- */
+
+static int singlebyte = 0;
+module_param(singlebyte, int, 0);
+MODULE_PARM_DESC(singlebyte,"Enable sending MIDI messages with single message packet");
+
+static int maxdevices = 4;
+module_param(maxdevices, int, 0);
+MODULE_PARM_DESC(maxdevices,"Max number of allocatable MIDI device");
+
+static int uvendor     = -1;
+module_param(uvendor, int, 0);
+MODULE_PARM_DESC(uvendor, "The USB Vendor ID of a semi-compliant interface");
+
+static int uproduct    = -1;
+module_param(uproduct, int, 0);
+MODULE_PARM_DESC(uproduct, "The USB Product ID of a semi-compliant interface");
+
+static int uinterface  = -1;
+module_param(uinterface, int, 0);
+MODULE_PARM_DESC(uinterface, "The Interface number of a semi-compliant interface");
+
+static int ualt        = -1;
+module_param(ualt, int, 0);
+MODULE_PARM_DESC(ualt, "The optional alternative setting of a semi-compliant interface");
+
+static int umin        = -1;
+module_param(umin, int, 0);
+MODULE_PARM_DESC(umin, "The input endpoint of a semi-compliant interface");
+
+static int umout       = -1;
+module_param(umout, int, 0);
+MODULE_PARM_DESC(umout, "The output endpoint of a semi-compliant interface");
+
+static int ucable      = -1;
+module_param(ucable, int, 0);
+MODULE_PARM_DESC(ucable, "The cable number used for a semi-compliant interface");
+
+/** Note -- the usb_string() returns only Latin-1 characters.
+ * (unicode chars <= 255). To support Japanese, a unicode16LE-to-EUC or
+ * unicode16LE-to-JIS routine is needed to wrap around usb_get_string().
+ **/
+static unsigned short ulangid      = 0x0409; /** 0x0411 for Japanese **/
+module_param(ulangid, ushort, 0);
+MODULE_PARM_DESC(ulangid, "The optional preferred USB Language ID for all devices");
+
+MODULE_AUTHOR("NAGANO Daisuke <breeze.nagano@nifty.ne.jp>");
+MODULE_DESCRIPTION("USB-MIDI driver");
+MODULE_LICENSE("GPL");
+
+/* ------------------------------------------------------------------------- */
+
+/** MIDIStreaming Class-Specific Interface Descriptor Subtypes **/
+
+#define MS_DESCRIPTOR_UNDEFINED	0
+#define MS_HEADER		1
+#define MIDI_IN_JACK		2
+#define MIDI_OUT_JACK		3
+/* Spec reads: ELEMENT */
+#define ELEMENT_DESCRIPTOR   	4
+
+#define MS_HEADER_LENGTH	7
+
+/** MIDIStreaming Class-Specific Endpoint Descriptor Subtypes **/
+
+#define DESCRIPTOR_UNDEFINED	0
+/* Spec reads: MS_GENERAL */
+#define MS_GENERAL_ENDPOINT	1
+
+/** MIDIStreaming MIDI IN and OUT Jack Types **/
+
+#define JACK_TYPE_UNDEFINED	0
+/* Spec reads: EMBEDDED */
+#define EMBEDDED_JACK		1
+/* Spec reads: EXTERNAL */
+#define EXTERNAL_JACK		2
+
+
+/* structure summary
+  
+      usb_midi_state     usb_device
+       |         |
+      *|        *|       per ep
+     in_ep     out_ep
+       |         |
+      *|        *|       per cable
+      min       mout
+       |         |       (cable to device pairing magic)
+       |         |
+       usb_midi_dev      dev_id (major,minor) == file->private_data
+
+*/
+
+/* usb_midi_state: corresponds to a USB-MIDI module */
+struct usb_midi_state {
+	struct list_head   mididev;
+	
+	struct usb_device *usbdev;
+	
+	struct list_head   midiDevList;
+	struct list_head   inEndpointList;
+	struct list_head   outEndpointList;
+	
+	spinlock_t         lock;
+	
+	unsigned int       count; /* usage counter */
+};
+
+/* midi_out_endpoint: corresponds to an output endpoint */
+struct midi_out_endpoint {
+	struct list_head  list;
+	
+	struct usb_device *usbdev;
+	int                endpoint;
+	spinlock_t         lock;
+	wait_queue_head_t  wait;
+	
+	unsigned char     *buf;
+	int                bufWrPtr;
+	int                bufSize;
+	
+	struct urb       *urb;
+};
+
+/* midi_in_endpoint: corresponds to an input endpoint */
+struct midi_in_endpoint {
+	struct list_head   list;
+
+	struct usb_device *usbdev;
+	int                endpoint;
+	spinlock_t         lock;
+	wait_queue_head_t  wait;
+
+	struct usb_mididev *cables[16];	// cables open for read
+	int                 readers;	// number of cables open for read
+
+	struct urb        *urb;
+	unsigned char     *recvBuf;
+	int                recvBufSize;
+	int                urbSubmitted;	//FIXME: == readers > 0
+};
+
+/* usb_mididev: corresponds to a logical device */
+struct usb_mididev {
+	struct list_head       list;
+
+	struct usb_midi_state *midi;
+	int                    dev_midi;
+	mode_t                 open_mode;
+
+	struct {
+		struct midi_in_endpoint *ep;
+		int              cableId;
+		
+// as we are pushing data from usb_bulk_read to usb_midi_read,
+// we need a larger, cyclic buffer here.
+		unsigned char    buf[MIDI_IN_BUFSIZ];
+		int              bufRdPtr;
+		int              bufWrPtr;
+		int              bufRemains;
+	} min;
+
+	struct {
+		struct midi_out_endpoint *ep;
+		int              cableId;
+		
+		unsigned char    buf[3];
+		int              bufPtr;
+		int              bufRemains;
+		
+		int              isInExclusive;
+		unsigned char    lastEvent;
+	} mout;
+
+	int singlebyte;
+};
+
+/** Map the high nybble of MIDI voice messages to number of Message bytes.
+ * High nyble ranges from 0x8 to 0xe
+ */
+
+static int remains_80e0[] = {
+	3,	/** 0x8X Note Off **/
+	3,	/** 0x9X Note On **/
+	3,	/** 0xAX Poly-key pressure **/
+	3,	/** 0xBX Control Change **/
+	2,	/** 0xCX Program Change **/
+	2,	/** 0xDX Channel pressure **/
+	3 	/** 0xEX PitchBend Change **/
+};
+
+/** Map the messages to a number of Message bytes.
+ *
+ **/
+static int remains_f0f6[] = {
+	0,	/** 0xF0 **/
+	2,	/** 0XF1 **/
+	3,	/** 0XF2 **/
+	2,	/** 0XF3 **/
+	2,	/** 0XF4 (Undefined by MIDI Spec, and subject to change) **/
+	2,	/** 0XF5 (Undefined by MIDI Spec, and subject to change) **/
+	1	/** 0XF6 **/
+};
+
+/** Map the messages to a CIN (Code Index Number).
+ *
+ **/
+static int cin_f0ff[] = {
+	4,	/** 0xF0 System Exclusive Message Start (special cases may be 6 or 7) */
+	2,	/** 0xF1 **/
+	3,	/** 0xF2 **/
+	2,	/** 0xF3 **/
+	2,	/** 0xF4 **/
+	2,	/** 0xF5 **/
+	5,	/** 0xF6 **/
+	5,	/** 0xF7 End of System Exclusive Message (May be 6 or 7) **/
+	5,	/** 0xF8 **/
+	5,	/** 0xF9 **/
+	5,	/** 0xFA **/
+	5,	/** 0xFB **/
+	5,	/** 0xFC **/
+	5,	/** 0xFD **/
+	5,	/** 0xFE **/
+	5	/** 0xFF **/
+};
+
+/** Map MIDIStreaming Event packet Code Index Number (low nybble of byte 0)
+ * to the number of bytes of valid MIDI data.
+ *
+ * CIN of 0 and 1 are NOT USED in MIDIStreaming 1.0.
+ *
+ **/
+static int cin_to_len[] = {
+	0, 0, 2, 3,
+	3, 1, 2, 3,
+	3, 3, 3, 3,
+	2, 2, 3, 1
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+static struct list_head mididevs = LIST_HEAD_INIT(mididevs);
+
+static DECLARE_MUTEX(open_sem);
+static DECLARE_WAIT_QUEUE_HEAD(open_wait);
+
+
+/* ------------------------------------------------------------------------- */
+
+static void usb_write_callback(struct urb *urb, struct pt_regs *regs)
+{
+	struct midi_out_endpoint *ep = (struct midi_out_endpoint *)urb->context;
+
+	if ( waitqueue_active( &ep->wait ) )
+		wake_up_interruptible( &ep->wait );
+}
+
+
+static int usb_write( struct midi_out_endpoint *ep, unsigned char *buf, int len )
+{
+	struct usb_device *d;
+	int pipe;
+	int ret = 0;
+	int status;
+	int maxretry = 50;
+	
+	DECLARE_WAITQUEUE(wait,current);
+	init_waitqueue_head(&ep->wait);
+
+	d = ep->usbdev;
+	pipe = usb_sndbulkpipe(d, ep->endpoint);
+	usb_fill_bulk_urb( ep->urb, d, pipe, (unsigned char*)buf, len,
+		       usb_write_callback, ep );
+
+	status = usb_submit_urb(ep->urb, GFP_KERNEL);
+    
+	if (status) {
+		printk(KERN_ERR "usbmidi: Cannot submit urb (%d)\n",status);
+		ret = -EIO;
+		goto error;
+	}
+
+	add_wait_queue( &ep->wait, &wait );
+	set_current_state( TASK_INTERRUPTIBLE );
+
+	while( ep->urb->status == -EINPROGRESS ) {
+		if ( maxretry-- < 0 ) {
+			printk(KERN_ERR "usbmidi: usb_bulk_msg timed out\n");
+			ret = -ETIME;
+			break;
+		}
+		interruptible_sleep_on_timeout( &ep->wait, 10 );
+	}
+	set_current_state( TASK_RUNNING );
+	remove_wait_queue( &ep->wait, &wait );
+
+error:
+	return ret;
+}
+
+
+/** Copy data from URB to In endpoint buf.
+ * Discard if CIN == 0 or CIN = 1.
+ *
+ *
+ **/
+
+static void usb_bulk_read(struct urb *urb, struct pt_regs *regs)
+{
+	struct midi_in_endpoint *ep = (struct midi_in_endpoint *)(urb->context);
+	unsigned char *data = urb->transfer_buffer;
+	int i, j, wake;
+
+	if ( !ep->urbSubmitted ) {
+		return;
+	}
+
+	if ( (urb->status == 0) && (urb->actual_length > 0) ) {
+		wake = 0;
+		spin_lock( &ep->lock );
+
+		for(j = 0; j < urb->actual_length; j += 4) {
+			int cin = (data[j]>>0)&0xf;
+			int cab = (data[j]>>4)&0xf;
+			struct usb_mididev *cable = ep->cables[cab];
+			if ( cable ) {
+				int len = cin_to_len[cin]; /** length of MIDI data **/
+				for (i = 0; i < len; i++) {
+					cable->min.buf[cable->min.bufWrPtr] = data[1+i+j];
+					cable->min.bufWrPtr = (cable->min.bufWrPtr+1)%MIDI_IN_BUFSIZ;
+					if (cable->min.bufRemains < MIDI_IN_BUFSIZ)
+						cable->min.bufRemains += 1;
+					else /** need to drop data **/
+						cable->min.bufRdPtr += (cable->min.bufRdPtr+1)%MIDI_IN_BUFSIZ;
+					wake = 1;
+				}
+			}
+		}
+
+		spin_unlock ( &ep->lock );
+		if ( wake ) {
+			wake_up( &ep->wait );
+		}
+	}
+
+	/* urb->dev must be reinitialized on 2.4.x kernels */
+	urb->dev = ep->usbdev;
+
+	urb->actual_length = 0;
+	usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+
+
+/* ------------------------------------------------------------------------- */
+
+/* This routine must be called with spin_lock */
+
+/** Wrapper around usb_write().
+ *  This routine must be called with spin_lock held on ep.
+ *  Called by midiWrite(), putOneMidiEvent(), and  usb_midi_write();
+ **/
+static int flush_midi_buffer( struct midi_out_endpoint *ep )
+{
+	int ret=0;
+
+	if ( ep->bufWrPtr > 0 ) {
+		ret = usb_write( ep, ep->buf, ep->bufWrPtr );
+		ep->bufWrPtr = 0;
+	}
+
+	return ret;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/** Given a MIDI Event, determine size of data to be attached to 
+ * USB-MIDI packet.
+ * Returns 1, 2 or 3.
+ * Called by midiWrite();
+ * Uses remains_80e0 and remains_f0f6;
+ **/
+static int get_remains(int event)
+{
+	int ret;
+
+	if ( event  < 0x80 ) {
+		ret = 1;
+	} else if ( event < 0xf0 ) {
+		ret = remains_80e0[((event-0x80)>>4)&0x0f];
+	} else if ( event < 0xf7 ) {
+		ret = remains_f0f6[event-0xf0];
+	} else {
+		ret = 1;
+	}
+
+	return ret;
+}
+
+/** Given the output MIDI data in the output buffer, computes a reasonable 
+ * CIN.
+ * Called by putOneMidiEvent().
+ **/
+static int get_CIN( struct usb_mididev *m )
+{
+	int cin;
+
+	if ( m->mout.buf[0] == 0xf7 ) {
+		cin = 5;
+	}
+	else if ( m->mout.buf[1] == 0xf7 ) {
+		cin = 6;
+	}
+	else if ( m->mout.buf[2] == 0xf7 ) {
+		cin = 7;
+	}
+	else {
+		if ( m->mout.isInExclusive == 1 ) {
+			cin = 4;
+		} else if ( m->mout.buf[0] < 0x80 ) {
+			/** One byte that we know nothing about. **/
+			cin = 0xF; 
+		} else if ( m->mout.buf[0] < 0xf0 ) {
+			/** MIDI Voice messages 0x8X to 0xEX map to cin 0x8 to 0xE. **/
+			cin = (m->mout.buf[0]>>4)&0x0f; 
+		}
+		else {
+			/** Special lookup table exists for real-time events. **/
+			cin = cin_f0ff[m->mout.buf[0]-0xf0];
+		}
+	}
+
+	return cin;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+
+/** Move data to USB endpoint buffer.
+ *
+ **/
+static int put_one_midi_event(struct usb_mididev *m)
+{
+	int cin;
+	unsigned long flags;
+	struct midi_out_endpoint *ep = m->mout.ep;
+	int ret=0;
+
+	cin = get_CIN( m );
+	if ( cin > 0x0f || cin < 0 ) {
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave( &ep->lock, flags );
+	ep->buf[ep->bufWrPtr++] = (m->mout.cableId<<4) | cin;
+	ep->buf[ep->bufWrPtr++] = m->mout.buf[0];
+	ep->buf[ep->bufWrPtr++] = m->mout.buf[1];
+	ep->buf[ep->bufWrPtr++] = m->mout.buf[2];
+	if ( ep->bufWrPtr >= ep->bufSize ) {
+		ret = flush_midi_buffer( ep );
+	}
+	spin_unlock_irqrestore( &ep->lock, flags);
+
+	m->mout.buf[0] = m->mout.buf[1] = m->mout.buf[2] = 0;
+	m->mout.bufPtr = 0;
+
+	return ret;
+}
+
+/** Write the MIDI message v on the midi device.
+ *  Called by usb_midi_write();
+ *  Responsible for packaging a MIDI data stream into USB-MIDI packets.
+ **/
+
+static int midi_write( struct usb_mididev *m, int v )
+{
+	unsigned long flags;
+	struct midi_out_endpoint *ep = m->mout.ep;
+	int ret=0;
+	unsigned char c = (unsigned char)v;
+	unsigned char sysrt_buf[4];
+
+	if ( m->singlebyte != 0 ) {
+		/** Simple code to handle the single-byte USB-MIDI protocol. */
+		spin_lock_irqsave( &ep->lock, flags );
+		if ( ep->bufWrPtr+4 > ep->bufSize ) {
+			ret = flush_midi_buffer( ep );
+			if ( !ret ) {
+				spin_unlock_irqrestore( &ep->lock, flags );
+				return ret;
+			}
+		}
+		ep->buf[ep->bufWrPtr++] = (m->mout.cableId<<4) |  0x0f; /* single byte */
+		ep->buf[ep->bufWrPtr++] = c;
+		ep->buf[ep->bufWrPtr++] = 0;
+		ep->buf[ep->bufWrPtr++] = 0;
+		if ( ep->bufWrPtr >= ep->bufSize ) {
+			ret = flush_midi_buffer( ep );
+		}
+		spin_unlock_irqrestore( &ep->lock, flags );
+
+		return ret;
+	}
+	/** Normal USB-MIDI protocol begins here. */
+
+	if ( c > 0xf7 ) {	/* system: Realtime messages */
+		/** Realtime messages are written IMMEDIATELY. */
+		sysrt_buf[0] = (m->mout.cableId<<4) | 0x0f;
+		sysrt_buf[1] = c;
+		sysrt_buf[2] = 0;
+		sysrt_buf[3] = 0;
+		spin_lock_irqsave( &ep->lock, flags );
+		ret = usb_write( ep, sysrt_buf, 4 );
+		spin_unlock_irqrestore( &ep->lock, flags );
+		/* m->mout.lastEvent = 0; */
+
+		return ret;
+	}
+
+	if ( c >= 0x80 ) {
+		if ( c < 0xf0 ) {
+			m->mout.lastEvent = c;
+			m->mout.isInExclusive = 0;
+			m->mout.bufRemains = get_remains(c);
+		} else if ( c == 0xf0 ) {
+			/* m->mout.lastEvent = 0; */
+			m->mout.isInExclusive = 1;
+			m->mout.bufRemains = get_remains(c);
+		} else if ( c == 0xf7 && m->mout.isInExclusive == 1 ) {
+			/* m->mout.lastEvent = 0; */
+			m->mout.isInExclusive = 0;
+			m->mout.bufRemains = 1;
+		} else if ( c > 0xf0 ) {
+			/* m->mout.lastEvent = 0; */
+			m->mout.isInExclusive = 0;
+			m->mout.bufRemains = get_remains(c);
+		}
+    
+	} else if ( m->mout.bufRemains == 0 && m->mout.isInExclusive == 0 ) {
+		if ( m->mout.lastEvent == 0 ) {
+			return 0; /* discard, waiting for the first event */
+		}
+		/** track status **/
+		m->mout.buf[0] = m->mout.lastEvent;
+		m->mout.bufPtr = 1;
+		m->mout.bufRemains = get_remains(m->mout.lastEvent)-1;
+	}
+  
+	m->mout.buf[m->mout.bufPtr++] = c;
+	m->mout.bufRemains--;
+	if ( m->mout.bufRemains == 0 || m->mout.bufPtr >= 3) {
+		ret = put_one_midi_event(m);
+	}
+
+	return ret;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+/** Basic operation on /dev/midiXX as registered through struct file_operations.
+ *
+ *  Basic contract: Used to change the current read/write position in a file.
+ *  On success, the non-negative position is reported.
+ *  On failure, the negative of an error code is reported.
+ *
+ *  Because a MIDIStream is not a file, all seek operations are doomed to fail.
+ *
+ **/
+static loff_t usb_midi_llseek(struct file *file, loff_t offset, int origin)
+{
+	/** Tell user you cannot seek on a PIPE-like device. **/
+	return -ESPIPE;
+}
+
+
+/** Basic operation on /dev/midiXX as registered through struct file_operations.
+ *
+ * Basic contract: Block until count bytes have been read or an error occurs.
+ *
+ **/
+
+static ssize_t usb_midi_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
+{
+	struct usb_mididev *m = (struct usb_mididev *)file->private_data;
+	struct midi_in_endpoint *ep = m->min.ep;
+	ssize_t ret;
+	DECLARE_WAITQUEUE(wait, current);
+
+	if ( !access_ok(VERIFY_READ, buffer, count) ) {
+		return -EFAULT;
+	}
+	if ( count == 0 ) {
+		return 0;
+	}
+
+	add_wait_queue( &ep->wait, &wait );
+	ret = 0;
+	while( count > 0 ) {
+		int cnt;
+		int d = (int)count;
+
+		cnt = m->min.bufRemains;
+		if ( cnt > d ) {
+			cnt = d;
+		}
+
+		if ( cnt <= 0 ) {
+			if ( file->f_flags & O_NONBLOCK ) {
+				if (!ret) 
+					ret = -EAGAIN;
+				break;
+			}
+			__set_current_state(TASK_INTERRUPTIBLE);
+			schedule();
+			if (signal_pending(current)) {
+				if(!ret)
+					ret=-ERESTARTSYS;
+				break;
+			}
+			continue;
+		}
+
+		{
+			int i;
+			unsigned long flags; /* used to synchronize access to the endpoint */
+			spin_lock_irqsave( &ep->lock, flags );
+			for (i = 0; i < cnt; i++) {
+				if ( copy_to_user( buffer+i, m->min.buf+m->min.bufRdPtr, 1 ) ) {
+					if ( !ret )
+						ret = -EFAULT;
+					break;
+				}
+				m->min.bufRdPtr = (m->min.bufRdPtr+1)%MIDI_IN_BUFSIZ;
+				m->min.bufRemains -= 1;
+			}
+			spin_unlock_irqrestore( &ep->lock, flags );
+		}
+
+		count-=cnt;
+		buffer+=cnt;
+		ret+=cnt;
+
+		break;
+	}
+
+	remove_wait_queue( &ep->wait, &wait );
+	set_current_state(TASK_RUNNING);
+
+	return ret;
+}
+
+
+/** Basic operation on /dev/midiXX as registered through struct file_operations.
+ *
+ *  Basic Contract: Take MIDI data byte-by-byte and pass it to
+ *  writeMidi() which packages MIDI data into USB-MIDI stream.
+ *  Then flushMidiData() is called to ensure all bytes have been written
+ *  in a timely fashion.
+ *
+ **/
+
+static ssize_t usb_midi_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
+{
+	struct usb_mididev *m = (struct usb_mididev *)file->private_data;
+	ssize_t ret;
+	unsigned long int flags;
+
+	if ( !access_ok(VERIFY_READ, buffer, count) ) {
+		return -EFAULT;
+	}
+	if ( count == 0 ) {
+		return 0;
+	}
+
+	ret = 0;
+	while( count > 0 ) {
+		unsigned char c;
+
+		if (copy_from_user((unsigned char *)&c, buffer, 1)) {
+			if ( ret == 0 )
+				ret = -EFAULT;
+			break;
+		}
+		if( midi_write(m, (int)c) ) {
+			if ( ret == 0 )
+				ret = -EFAULT;
+			break;
+		}
+		count--;
+		buffer++;
+		ret++;
+	}
+
+	spin_lock_irqsave( &m->mout.ep->lock, flags );
+	if ( flush_midi_buffer(m->mout.ep) < 0 ) {
+		ret = -EFAULT;
+	}
+	spin_unlock_irqrestore( &m->mout.ep->lock, flags );
+
+	return ret;
+}
+
+/** Basic operation on /dev/midiXX as registered through struct file_operations.
+ *
+ * Basic contract:  Wait (spin) until ready to read or write on the file.
+ *
+ **/
+static unsigned int usb_midi_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct usb_mididev *m = (struct usb_mididev *)file->private_data;
+	struct midi_in_endpoint *iep = m->min.ep;
+	struct midi_out_endpoint *oep = m->mout.ep;
+	unsigned long flags;
+	unsigned int mask = 0;
+  
+	if ( file->f_mode & FMODE_READ ) {
+		poll_wait( file, &iep->wait, wait );
+		spin_lock_irqsave( &iep->lock, flags );
+		if ( m->min.bufRemains > 0 )
+			mask |= POLLIN | POLLRDNORM;
+		spin_unlock_irqrestore( &iep->lock, flags );
+	}
+
+	if ( file->f_mode & FMODE_WRITE ) {
+		poll_wait( file, &oep->wait, wait );
+		spin_lock_irqsave( &oep->lock, flags );
+		if ( oep->bufWrPtr < oep->bufSize )
+			mask |= POLLOUT | POLLWRNORM;
+		spin_unlock_irqrestore( &oep->lock, flags );
+	}
+
+	return mask;
+}
+
+
+/** Basic operation on /dev/midiXX as registered through struct file_operations.
+ *
+ * Basic contract: This is always the first operation performed on the
+ * device node. If no method is defined, the open succeeds without any
+ * notification given to the module.
+ *
+ **/
+
+static int usb_midi_open(struct inode *inode, struct file *file)
+{
+	int minor = iminor(inode);
+	DECLARE_WAITQUEUE(wait, current);
+	struct usb_midi_state *s;
+	struct usb_mididev    *m;
+	unsigned long flags;
+	int succeed = 0;
+
+#if 0
+	printk(KERN_INFO "usb-midi: Open minor= %d.\n", minor);
+#endif
+
+	for(;;) {
+		down(&open_sem);
+		list_for_each_entry(s, &mididevs, mididev) {
+			list_for_each_entry(m, &s->midiDevList, list) {
+				if ( !((m->dev_midi ^ minor) & ~0xf) )
+					goto device_found;
+			}
+		}
+		up(&open_sem);
+		return -ENODEV;
+
+	device_found:
+		if ( !s->usbdev ) {
+			up(&open_sem);
+			return -EIO;
+		}
+		if ( !(m->open_mode & file->f_mode) ) {
+			break;
+		}
+		if ( file->f_flags & O_NONBLOCK ) {
+			up(&open_sem);
+			return -EBUSY;
+		}
+		__set_current_state(TASK_INTERRUPTIBLE);
+		add_wait_queue( &open_wait, &wait );
+		up(&open_sem);
+		schedule();
+		remove_wait_queue( &open_wait, &wait );
+		if ( signal_pending(current) ) {
+			return -ERESTARTSYS;
+		}
+	}
+
+	file->private_data = m;
+	spin_lock_irqsave( &s->lock, flags );
+
+	if ( !(m->open_mode & (FMODE_READ | FMODE_WRITE)) ) {
+		//FIXME: intented semantics unclear here
+		m->min.bufRdPtr       = 0;
+		m->min.bufWrPtr       = 0;
+		m->min.bufRemains     = 0;
+		spin_lock_init(&m->min.ep->lock);
+
+		m->mout.bufPtr        = 0;
+		m->mout.bufRemains    = 0;
+		m->mout.isInExclusive = 0;
+		m->mout.lastEvent     = 0;
+		spin_lock_init(&m->mout.ep->lock);
+	}
+
+	if ( (file->f_mode & FMODE_READ) && m->min.ep != NULL ) {
+		unsigned long int flagsep;
+		spin_lock_irqsave( &m->min.ep->lock, flagsep );
+		m->min.ep->cables[m->min.cableId] = m;
+		m->min.ep->readers += 1;
+		m->min.bufRdPtr       = 0;
+		m->min.bufWrPtr       = 0;
+		m->min.bufRemains     = 0;
+		spin_unlock_irqrestore( &m->min.ep->lock, flagsep );
+
+		if ( !(m->min.ep->urbSubmitted)) {
+
+			/* urb->dev must be reinitialized on 2.4.x kernels */
+			m->min.ep->urb->dev = m->min.ep->usbdev;
+
+			if ( usb_submit_urb(m->min.ep->urb, GFP_ATOMIC) ) {
+				printk(KERN_ERR "usbmidi: Cannot submit urb for MIDI-IN\n");
+			}
+			m->min.ep->urbSubmitted = 1;
+		}
+		m->open_mode |= FMODE_READ;
+		succeed = 1;
+	}
+
+	if ( (file->f_mode & FMODE_WRITE) && m->mout.ep != NULL ) {
+		m->mout.bufPtr        = 0;
+		m->mout.bufRemains    = 0;
+		m->mout.isInExclusive = 0;
+		m->mout.lastEvent     = 0;
+		m->open_mode |= FMODE_WRITE;
+		succeed = 1;
+	}
+
+	spin_unlock_irqrestore( &s->lock, flags );
+
+	s->count++;
+	up(&open_sem);
+
+	/** Changed to prevent extra increments to USE_COUNT. **/
+	if (!succeed) {
+		return -EBUSY;
+	}
+
+#if 0
+	printk(KERN_INFO "usb-midi: Open Succeeded. minor= %d.\n", minor);
+#endif
+
+	return nonseekable_open(inode, file); /** Success. **/
+}
+
+
+/** Basic operation on /dev/midiXX as registered through struct file_operations.
+ *
+ *  Basic contract: Close an opened file and deallocate anything we allocated.
+ *  Like open(), this can be missing. If open set file->private_data,
+ *  release() must clear it.
+ *
+ **/
+
+static int usb_midi_release(struct inode *inode, struct file *file)
+{
+	struct usb_mididev *m = (struct usb_mididev *)file->private_data;
+	struct usb_midi_state *s = (struct usb_midi_state *)m->midi;
+
+#if 0
+	printk(KERN_INFO "usb-midi: Close.\n");
+#endif
+
+	down(&open_sem);
+
+	if ( m->open_mode & FMODE_WRITE ) {
+		m->open_mode &= ~FMODE_WRITE;
+		usb_kill_urb( m->mout.ep->urb );
+	}
+
+	if ( m->open_mode & FMODE_READ ) {
+	        unsigned long int flagsep;
+	        spin_lock_irqsave( &m->min.ep->lock, flagsep );
+                m->min.ep->cables[m->min.cableId] = NULL; // discard cable
+                m->min.ep->readers -= 1;
+		m->open_mode &= ~FMODE_READ;
+		if ( m->min.ep->readers == 0 &&
+                     m->min.ep->urbSubmitted ) {
+			m->min.ep->urbSubmitted = 0;
+			usb_kill_urb(m->min.ep->urb);
+		}
+	        spin_unlock_irqrestore( &m->min.ep->lock, flagsep );
+	}
+
+	s->count--;
+
+	up(&open_sem);
+	wake_up(&open_wait);
+
+	file->private_data = NULL;
+	return 0;
+}
+
+static struct file_operations usb_midi_fops = {
+	.owner =	THIS_MODULE,
+	.llseek =	usb_midi_llseek,
+	.read =		usb_midi_read,
+	.write =	usb_midi_write,
+	.poll =		usb_midi_poll,
+	.open =		usb_midi_open,
+	.release =	usb_midi_release,
+};
+
+/* ------------------------------------------------------------------------- */
+
+/** Returns filled midi_in_endpoint structure or null on failure.
+ *
+ * Parameters:
+ *	d        - a usb_device
+ *	endPoint - An usb endpoint in the range 0 to 15.
+ * Called by allocUsbMidiDev();
+ *
+ **/
+
+static struct midi_in_endpoint *alloc_midi_in_endpoint( struct usb_device *d, int endPoint )
+{
+	struct midi_in_endpoint *ep;
+	int bufSize;
+	int pipe;
+
+	endPoint &= 0x0f; /* Silently force endPoint to lie in range 0 to 15. */
+
+	pipe =  usb_rcvbulkpipe( d, endPoint );
+	bufSize = usb_maxpacket( d, pipe, 0 );
+	/* usb_pipein() = ! usb_pipeout() = true for an in Endpoint */
+
+	ep = (struct midi_in_endpoint *)kmalloc(sizeof(struct midi_in_endpoint), GFP_KERNEL);
+	if ( !ep ) {
+		printk(KERN_ERR "usbmidi: no memory for midi in-endpoint\n");
+		return NULL;
+	}
+	memset( ep, 0, sizeof(struct midi_in_endpoint) );
+//      this sets cables[] and readers to 0, too.
+//      for (i=0; i<16; i++) ep->cables[i] = 0; // discard cable
+//      ep->readers = 0;
+
+	ep->endpoint = endPoint;
+
+	ep->recvBuf = (unsigned char *)kmalloc(sizeof(unsigned char)*(bufSize), GFP_KERNEL);
+	if ( !ep->recvBuf ) {
+		printk(KERN_ERR "usbmidi: no memory for midi in-endpoint buffer\n");
+		kfree(ep);
+		return NULL;
+	}
+
+	ep->urb = usb_alloc_urb(0, GFP_KERNEL); /* no ISO */
+	if ( !ep->urb ) {
+		printk(KERN_ERR "usbmidi: no memory for midi in-endpoint urb\n");
+		kfree(ep->recvBuf);
+		kfree(ep);
+		return NULL;
+	}
+	usb_fill_bulk_urb( ep->urb, d, 
+		       usb_rcvbulkpipe(d, endPoint),
+		       (unsigned char *)ep->recvBuf, bufSize,
+		       usb_bulk_read, ep );
+
+	/* ep->bufRdPtr     = 0; */
+	/* ep->bufWrPtr     = 0; */
+	/* ep->bufRemains   = 0; */
+	/* ep->urbSubmitted = 0; */
+	ep->recvBufSize  = bufSize;
+
+	init_waitqueue_head(&ep->wait);
+
+	return ep;
+}
+
+static int remove_midi_in_endpoint( struct midi_in_endpoint *min )
+{
+	usb_kill_urb( min->urb );
+	usb_free_urb( min->urb );
+	kfree( min->recvBuf );
+	kfree( min );
+
+	return 0;
+}
+
+/** Returns filled midi_out_endpoint structure or null on failure.
+ *
+ * Parameters:
+ *	d        - a usb_device
+ *	endPoint - An usb endpoint in the range 0 to 15.
+ * Called by allocUsbMidiDev();
+ *
+ **/
+static struct midi_out_endpoint *alloc_midi_out_endpoint( struct usb_device *d, int endPoint )
+{
+	struct midi_out_endpoint *ep = NULL;
+	int pipe;
+	int bufSize;
+
+	endPoint &= 0x0f;
+	pipe =  usb_sndbulkpipe( d, endPoint );
+	bufSize = usb_maxpacket( d, pipe, 1 );
+
+	ep = (struct midi_out_endpoint *)kmalloc(sizeof(struct midi_out_endpoint), GFP_KERNEL);
+	if ( !ep ) {
+		printk(KERN_ERR "usbmidi: no memory for midi out-endpoint\n");
+		return NULL;
+	}
+	memset( ep, 0, sizeof(struct midi_out_endpoint) );
+
+	ep->endpoint = endPoint;
+	ep->buf = (unsigned char *)kmalloc(sizeof(unsigned char)*bufSize, GFP_KERNEL);
+	if ( !ep->buf ) {
+		printk(KERN_ERR "usbmidi: no memory for midi out-endpoint buffer\n");
+		kfree(ep);
+		return NULL;
+	}
+
+	ep->urb = usb_alloc_urb(0, GFP_KERNEL); /* no ISO */
+	if ( !ep->urb ) {
+		printk(KERN_ERR "usbmidi: no memory for midi out-endpoint urb\n");
+		kfree(ep->buf);
+		kfree(ep);
+		return NULL;
+	}
+
+	ep->bufSize       = bufSize;
+	/* ep->bufWrPtr      = 0; */
+
+	init_waitqueue_head(&ep->wait);
+
+	return ep;
+}
+
+
+static int remove_midi_out_endpoint( struct midi_out_endpoint *mout )
+{
+	usb_kill_urb( mout->urb );
+	usb_free_urb( mout->urb );
+	kfree( mout->buf );
+	kfree( mout );
+
+	return 0;
+}
+
+
+/** Returns a filled usb_mididev structure, registered as a Linux MIDI device.
+ *
+ * Returns null if memory is not available or the device cannot be registered.
+ * Called by allocUsbMidiDev();
+ *
+ **/
+static struct usb_mididev *allocMidiDev(
+	struct usb_midi_state *s,
+	struct midi_in_endpoint *min,
+	struct midi_out_endpoint *mout,
+	int inCableId,
+	int outCableId )
+{
+	struct usb_mididev *m;
+
+	m = (struct usb_mididev *)kmalloc(sizeof(struct usb_mididev), GFP_KERNEL);
+	if (!m) {
+		printk(KERN_ERR "usbmidi: no memory for midi device\n");
+		return NULL;
+	}
+
+	memset(m, 0, sizeof(struct usb_mididev));
+
+	if ((m->dev_midi = register_sound_midi(&usb_midi_fops, -1)) < 0) {
+		printk(KERN_ERR "usbmidi: cannot register midi device\n");
+		kfree(m);
+		return NULL;
+	}
+
+	m->midi               = s;
+	/* m->open_mode          = 0; */
+
+	if ( min ) {
+		m->min.ep             = min;
+		m->min.ep->usbdev     = s->usbdev;
+		m->min.cableId        = inCableId;
+	}
+	/* m->min.bufPtr         = 0; */
+	/* m->min.bufRemains     = 0; */
+
+	if ( mout ) {
+		m->mout.ep            = mout;
+		m->mout.ep->usbdev    = s->usbdev;
+		m->mout.cableId       = outCableId;
+	}
+	/* m->mout.bufPtr        = 0; */
+	/* m->mout.bufRemains    = 0; */
+	/* m->mout.isInExclusive = 0; */
+	/* m->mout.lastEvent     = 0; */
+
+	m->singlebyte         = singlebyte;
+
+	return m;
+}
+
+
+static void release_midi_device( struct usb_midi_state *s )
+{
+	struct usb_mididev *m;
+	struct midi_in_endpoint *min;
+	struct midi_out_endpoint *mout;
+
+	if ( s->count > 0 ) {
+		up(&open_sem);
+		return;
+	}
+	up( &open_sem );
+	wake_up( &open_wait );
+
+	while(!list_empty(&s->inEndpointList)) {
+		min = list_entry(s->inEndpointList.next, struct midi_in_endpoint, list);
+		list_del(&min->list);
+		remove_midi_in_endpoint(min);
+	}
+
+	while(!list_empty(&s->outEndpointList)) {
+		mout = list_entry(s->outEndpointList.next, struct midi_out_endpoint, list);
+		list_del(&mout->list);
+		remove_midi_out_endpoint(mout);
+	}
+
+	while(!list_empty(&s->midiDevList)) {
+		m = list_entry(s->midiDevList.next, struct usb_mididev, list);
+		list_del(&m->list);
+		kfree(m);
+	}
+
+	kfree(s);
+
+	return;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+/** Utility routine to find a descriptor in a dump of many descriptors.
+ * Returns start of descriptor or NULL if not found. 
+ * descStart pointer to list of interfaces.
+ * descLength length (in bytes) of dump
+ * after (ignored if NULL) this routine returns only descriptors after "after"
+ * dtype (mandatory) The descriptor type.
+ * iface (ignored if -1) returns descriptor at/following given interface
+ * altSetting (ignored if -1) returns descriptor at/following given altSetting
+ *
+ *
+ *  Called by parseDescriptor(), find_csinterface_descriptor();
+ *
+ */
+static void *find_descriptor( void *descStart, unsigned int descLength, void *after, unsigned char dtype, int iface, int altSetting )
+{
+	unsigned char *p, *end, *next;
+	int interfaceNumber = -1, altSet = -1;
+
+	p = descStart;
+	end = p + descLength;
+	for( ; p < end; ) {
+		if ( p[0] < 2 )
+			return NULL;
+		next = p + p[0];
+		if ( next > end )
+			return NULL;
+		if ( p[1] == USB_DT_INTERFACE ) {
+			if ( p[0] < USB_DT_INTERFACE_SIZE )
+				return NULL;
+			interfaceNumber = p[2];
+			altSet = p[3];
+		}
+		if ( p[1] == dtype &&
+		     ( !after || ( p > (unsigned char *)after) ) &&
+		     ( ( iface == -1) || (iface == interfaceNumber) ) &&
+		     ( (altSetting == -1) || (altSetting == altSet) )) {
+			return p;
+		}
+		p = next;
+	}
+	return NULL;
+}
+
+/** Utility to find a class-specific interface descriptor.
+ *  dsubtype is a descriptor subtype
+ *  Called by parseDescriptor();
+ **/
+static void *find_csinterface_descriptor(void *descStart, unsigned int descLength, void *after, u8 dsubtype, int iface, int altSetting)
+{
+	unsigned char *p;
+  
+	p = find_descriptor( descStart, descLength, after, USB_DT_CS_INTERFACE, iface, altSetting );
+	while ( p ) {
+		if ( p[0] >= 3 && p[2] == dsubtype )
+			return p;
+		p = find_descriptor( descStart, descLength, p, USB_DT_CS_INTERFACE, 
+				     iface, altSetting );
+	}
+	return NULL;
+}
+
+
+/** The magic of making a new usb_midi_device from config happens here.
+ *
+ * The caller is responsible for free-ing this return value (if not NULL).
+ *
+ **/
+static struct usb_midi_device *parse_descriptor( struct usb_device *d, unsigned char *buffer, int bufSize, unsigned int ifnum , unsigned int altSetting, int quirks)
+{
+	struct usb_midi_device *u;
+	unsigned char *p1;
+	unsigned char *p2;
+	unsigned char *next;
+	int iep, oep;
+	int length;
+	unsigned long longBits;
+	int pins, nbytes, offset, shift, jack;
+#ifdef HAVE_JACK_STRINGS
+	/** Jacks can have associated names.  **/
+	unsigned char jack2string[256];
+#endif
+
+	u = NULL;
+	/* find audiocontrol interface */
+	p1 = find_csinterface_descriptor( buffer, bufSize, NULL,
+					  MS_HEADER, ifnum, altSetting);
+
+	if ( !p1 ) {
+		goto error_end;
+	}
+
+	if ( p1[0] < MS_HEADER_LENGTH ) {
+		goto error_end;
+	}
+
+	/* Assume success. Since the device corresponds to USB-MIDI spec, we assume
+	   that the rest of the USB 2.0 spec is obeyed. */
+
+	u = (struct usb_midi_device *)kmalloc( sizeof(struct usb_midi_device), GFP_KERNEL );
+	if ( !u ) {
+		return NULL;
+	}
+	u->deviceName = NULL;
+	u->idVendor = le16_to_cpu(d->descriptor.idVendor);
+	u->idProduct = le16_to_cpu(d->descriptor.idProduct);
+	u->interface = ifnum;
+	u->altSetting = altSetting;
+	u->in[0].endpoint = -1;
+	u->in[0].cableId = -1;
+	u->out[0].endpoint = -1;
+	u->out[0].cableId = -1;
+
+
+	printk(KERN_INFO "usb-midi: Found MIDIStreaming device corresponding to Release %d.%02d of spec.\n",
+	       (p1[4] >> 4) * 10 + (p1[4] & 0x0f ),
+	       (p1[3] >> 4) * 10 + (p1[3] & 0x0f )
+		);
+
+	length = p1[5] | (p1[6] << 8);
+
+#ifdef HAVE_JACK_STRINGS
+	memset(jack2string, 0, sizeof(unsigned char) * 256);
+#endif
+
+	length -= p1[0];
+	for (p2 = p1 + p1[0]; length > 0; p2 = next) {
+		next = p2 + p2[0];
+		length -= p2[0];
+
+		if (p2[0] < 2 )
+			break;
+		if (p2[1] != USB_DT_CS_INTERFACE)
+			break;
+		if (p2[2] == MIDI_IN_JACK && p2[0] >= 6 ) {
+			jack = p2[4];
+#ifdef HAVE_JACK_STRINGS
+			jack2string[jack] = p2[5];
+#endif
+			printk(KERN_INFO "usb-midi: Found IN Jack 0x%02x %s\n",
+			       jack, (p2[3] == EMBEDDED_JACK)?"EMBEDDED":"EXTERNAL" );
+		} else if ( p2[2] == MIDI_OUT_JACK && p2[0] >= 6) {
+			pins = p2[5];
+			if ( p2[0] < (6 + 2 * pins) )
+				continue;
+			jack = p2[4];
+#ifdef HAVE_JACK_STRINGS
+			jack2string[jack] = p2[5 + 2 * pins];
+#endif
+			printk(KERN_INFO "usb-midi: Found OUT Jack 0x%02x %s, %d pins\n",
+			       jack, (p2[3] == EMBEDDED_JACK)?"EMBEDDED":"EXTERNAL", pins );
+		} else if ( p2[2] == ELEMENT_DESCRIPTOR  && p2[0]  >= 10) {
+			pins = p2[4];
+			if ( p2[0] < (9 + 2 * pins ) )
+				continue;
+			nbytes = p2[8 + 2 * pins ];
+			if ( p2[0] < (10 + 2 * pins + nbytes) )
+				continue;
+			longBits = 0L;
+			for ( offset = 0, shift = 0; offset < nbytes && offset < 8; offset ++, shift += 8) {
+				longBits |= ((long)(p2[9 + 2 * pins + offset])) << shift;
+			}
+			jack = p2[3];
+#ifdef HAVE_JACK_STRINGS
+			jack2string[jack] = p2[9 + 2 * pins + nbytes];
+#endif
+			printk(KERN_INFO "usb-midi: Found ELEMENT 0x%02x, %d/%d pins in/out, bits: 0x%016lx\n",
+			       jack, pins, (int)(p2[5 + 2 * pins]), (long)longBits );
+		} else {
+		}
+	}
+
+	iep=0;
+	oep=0;
+
+	if (quirks==0) {
+		/* MIDISTREAM */
+		p2 = NULL;
+		for (p1 = find_descriptor(buffer, bufSize, NULL, USB_DT_ENDPOINT,
+					  ifnum, altSetting ); p1; p1 = next ) {
+			next = find_descriptor(buffer, bufSize, p1, USB_DT_ENDPOINT,
+					       ifnum, altSetting ); 
+			p2 = find_descriptor(buffer, bufSize, p1, USB_DT_CS_ENDPOINT,
+					     ifnum, altSetting ); 
+
+			if ( p2 && next && ( p2 > next ) )
+				p2 = NULL;
+
+			if ( p1[0] < 9 || !p2 || p2[0] < 4 )
+				continue;
+
+			if ( (p1[2] & 0x80) == 0x80 ) {
+				if ( iep < 15 ) {
+					pins = p2[3]; /* not pins -- actually "cables" */
+					if ( pins > 16 )
+						pins = 16;
+					u->in[iep].endpoint = p1[2];
+					u->in[iep].cableId = ( 1 << pins ) - 1;
+					if ( u->in[iep].cableId )
+						iep ++;
+					if ( iep < 15 ) {
+						u->in[iep].endpoint = -1;
+						u->in[iep].cableId = -1;
+					}
+				}
+			} else {
+				if ( oep < 15 ) {
+					pins = p2[3]; /* not pins -- actually "cables" */
+					if ( pins > 16 )
+						pins = 16;
+					u->out[oep].endpoint = p1[2];
+					u->out[oep].cableId = ( 1 << pins ) - 1;
+					if ( u->out[oep].cableId )
+						oep ++;
+					if ( oep < 15 ) {
+						u->out[oep].endpoint = -1;
+						u->out[oep].cableId = -1;
+					}
+				}
+			}
+	
+		}
+	} else if (quirks==1) {
+		/* YAMAHA quirks */
+		for (p1 = find_descriptor(buffer, bufSize, NULL, USB_DT_ENDPOINT,
+					  ifnum, altSetting ); p1; p1 = next ) {
+			next = find_descriptor(buffer, bufSize, p1, USB_DT_ENDPOINT,
+					       ifnum, altSetting ); 
+	
+			if ( p1[0] < 7 )
+				continue;
+
+			if ( (p1[2] & 0x80) == 0x80 ) {
+				if ( iep < 15 ) {
+					pins = iep+1;
+					if ( pins > 16 )
+						pins = 16;
+					u->in[iep].endpoint = p1[2];
+					u->in[iep].cableId = ( 1 << pins ) - 1;
+					if ( u->in[iep].cableId )
+						iep ++;
+					if ( iep < 15 ) {
+						u->in[iep].endpoint = -1;
+						u->in[iep].cableId = -1;
+					}
+				}
+			} else {
+				if ( oep < 15 ) {
+					pins = oep+1;
+					u->out[oep].endpoint = p1[2];
+					u->out[oep].cableId = ( 1 << pins ) - 1;
+					if ( u->out[oep].cableId )
+						oep ++;
+					if ( oep < 15 ) {
+						u->out[oep].endpoint = -1;
+						u->out[oep].cableId = -1;
+					}
+				}
+			}
+	
+		}
+	}
+
+	if ( !iep && ! oep ) {
+		goto error_end;
+	}
+
+	return u;
+
+error_end:
+	kfree(u);
+	return NULL;
+}
+
+/* ------------------------------------------------------------------------- */
+
+/** Returns number between 0 and 16.
+ *
+ **/
+static int on_bits( unsigned short v )
+{
+	int i;
+	int ret=0;
+
+	for ( i=0 ; i<16 ; i++ ) {
+		if ( v & (1<<i) )
+			ret++;
+	}
+
+	return ret;
+}
+
+
+/** USB-device will be interrogated for altSetting.
+ *
+ * Returns negative on error.
+ * Called by allocUsbMidiDev();
+ *
+ **/
+
+static int get_alt_setting( struct usb_device *d, int ifnum )
+{
+	int alts, alt=0;
+	struct usb_interface *iface;
+	struct usb_host_interface *interface;
+	struct usb_endpoint_descriptor *ep;
+	int epin, epout;
+	int i;
+
+	iface = usb_ifnum_to_if( d, ifnum );
+	alts = iface->num_altsetting;
+
+	for ( alt=0 ; alt<alts ; alt++ ) {
+		interface = &iface->altsetting[alt];
+		epin = -1;
+		epout = -1;
+
+		for ( i=0 ; i<interface->desc.bNumEndpoints ; i++ ) {
+			ep = &interface->endpoint[i].desc;
+			if ( (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ) {
+				continue;
+			}
+			if ( (ep->bEndpointAddress & USB_DIR_IN) && epin < 0 ) {
+				epin = i;
+			} else if ( epout < 0 ) {
+				epout = i;
+			}
+			if ( epin >= 0 && epout >= 0 ) {
+				return interface->desc.bAlternateSetting;
+			}
+		}
+	}
+
+	return -ENODEV;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/** Returns 0 if successful in allocating and registering internal structures.
+ * Returns negative on failure.
+ * Calls allocMidiDev which additionally registers /dev/midiXX devices.
+ * Writes messages on success to indicate which /dev/midiXX is which physical
+ * endpoint.
+ *
+ **/
+static int alloc_usb_midi_device( struct usb_device *d, struct usb_midi_state *s, struct usb_midi_device *u )
+{
+	struct usb_mididev **mdevs=NULL;
+	struct midi_in_endpoint *mins[15], *min;
+	struct midi_out_endpoint *mouts[15], *mout;
+	int inDevs=0, outDevs=0;
+	int inEndpoints=0, outEndpoints=0;
+	int inEndpoint, outEndpoint;
+	int inCableId, outCableId;
+	int i;
+	int devices = 0;
+	int alt = 0;
+
+	/* Obtain altSetting or die.. */
+	alt = u->altSetting;
+	if ( alt < 0 ) {
+		alt = get_alt_setting( d, u->interface );
+	}
+	if ( alt < 0 )
+		return -ENXIO;
+
+	/* Configure interface */
+	if ( usb_set_interface( d, u->interface, alt ) < 0 ) {
+		return -ENXIO;
+	}
+
+	for ( i = 0 ; i < 15 ; i++ ) {
+		mins[i] = NULL;
+		mouts[i] = NULL;
+	}
+
+	/* Begin Allocation */
+	while( inEndpoints < 15
+	       && inDevs < maxdevices
+	       && u->in[inEndpoints].cableId >= 0 ) {
+		inDevs += on_bits((unsigned short)u->in[inEndpoints].cableId);
+		mins[inEndpoints] = alloc_midi_in_endpoint( d, u->in[inEndpoints].endpoint );
+		if ( mins[inEndpoints] == NULL )
+			goto error_end;
+		inEndpoints++;
+	}
+
+	while( outEndpoints < 15
+	       && outDevs < maxdevices
+	       && u->out[outEndpoints].cableId >= 0 ) {
+		outDevs += on_bits((unsigned short)u->out[outEndpoints].cableId);
+		mouts[outEndpoints] = alloc_midi_out_endpoint( d, u->out[outEndpoints].endpoint );
+		if ( mouts[outEndpoints] == NULL )
+			goto error_end;
+		outEndpoints++;
+	}
+
+	devices = inDevs > outDevs ? inDevs : outDevs;
+	devices = maxdevices > devices ? devices : maxdevices;
+
+	/* obtain space for device name (iProduct) if not known. */
+	if ( ! u->deviceName ) {
+		mdevs = (struct usb_mididev **)
+			kmalloc(sizeof(struct usb_mididevs *)*devices
+				+ sizeof(char) * 256, GFP_KERNEL);
+	} else {
+		mdevs = (struct usb_mididev **)
+			kmalloc(sizeof(struct usb_mididevs *)*devices, GFP_KERNEL);
+	}
+
+	if ( !mdevs ) {
+		/* devices = 0; */
+		/* mdevs = NULL; */
+		goto error_end;
+	}
+	for ( i=0 ; i<devices ; i++ ) {
+		mdevs[i] = NULL;
+	}
+
+	/* obtain device name (iProduct) if not known. */
+	if ( ! u->deviceName ) {
+		u->deviceName = (char *) (mdevs + devices);
+		if ( ! d->have_langid && d->descriptor.iProduct) {
+			alt = usb_get_string(d, 0, 0, u->deviceName, 250);
+			if (alt < 0) {
+				printk(KERN_INFO "error getting string descriptor 0 (error=%d)\n", alt);
+			} else if (u->deviceName[0] < 4) {
+				printk(KERN_INFO "string descriptor 0 too short (length = %d)\n", alt);
+			} else {
+				printk(KERN_INFO "string descriptor 0 found (length = %d)\n", alt);
+				for(; alt >= 4; alt -= 2) {
+					i = u->deviceName[alt-2] | (u->deviceName[alt-1]<< 8);
+					printk(KERN_INFO "usb-midi: langid(%d) 0x%04x\n",
+					       (alt-4) >> 1, i);
+					if ( ( ( i ^ ulangid ) & 0xff ) == 0 ) {
+						d->have_langid = 1;
+						d->string_langid = i;
+						printk(KERN_INFO "usb-midi: langid(match) 0x%04x\n", i);
+						if ( i == ulangid )
+							break;
+					}
+				}
+			}
+		}
+		u->deviceName[0] = (char) 0;
+		if (d->descriptor.iProduct) {
+			printk(KERN_INFO "usb-midi: fetchString(%d)\n", d->descriptor.iProduct);
+			alt = usb_string(d, d->descriptor.iProduct, u->deviceName, 255);
+			if( alt < 0 ) {
+				u->deviceName[0] = (char) 0;
+			}
+			printk(KERN_INFO "usb-midi: fetchString = %d\n", alt);
+		} 
+		/* Failsafe */
+		if ( !u->deviceName[0] ) {
+			if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_ROLAND ) {
+				strcpy(u->deviceName, "Unknown Roland");
+			} else if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_STEINBERG  ) {
+				strcpy(u->deviceName, "Unknown Steinberg");
+			} else if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_YAMAHA ) {
+				strcpy(u->deviceName, "Unknown Yamaha");
+			} else {
+				strcpy(u->deviceName, "Unknown");
+			}
+		}
+	}
+
+	inEndpoint  = 0; inCableId  = -1;
+	outEndpoint = 0; outCableId = -1;
+
+	for ( i=0 ; i<devices ; i++ ) {
+		for ( inCableId ++ ;
+		      inEndpoint <15
+			      && mins[inEndpoint] 
+			      && !(u->in[inEndpoint].cableId & (1<<inCableId)) ;
+		      inCableId++ ) {
+			if ( inCableId >= 16 ) {
+				inEndpoint  ++;
+				inCableId  = 0;
+			}
+		}
+		min  = mins[inEndpoint];
+		for ( outCableId ++ ;
+		      outEndpoint <15
+			      && mouts[outEndpoint] 
+			      && !(u->out[outEndpoint].cableId & (1<<outCableId)) ;
+		      outCableId++ ) {
+			if ( outCableId >= 16 ) {
+				outEndpoint  ++;
+				outCableId  = 0;
+			}
+		}
+		mout = mouts[outEndpoint];
+
+		mdevs[i] = allocMidiDev( s, min, mout, inCableId, outCableId );
+		if ( mdevs[i] == NULL )
+			goto error_end;
+
+	}
+
+	/* Success! */
+	for ( i=0 ; i<devices ; i++ ) {
+		list_add_tail( &mdevs[i]->list, &s->midiDevList );
+	}
+	for ( i=0 ; i<inEndpoints ; i++ ) {
+		list_add_tail( &mins[i]->list, &s->inEndpointList );
+	}
+	for ( i=0 ; i<outEndpoints ; i++ ) {
+		list_add_tail( &mouts[i]->list, &s->outEndpointList );
+	}
+
+	printk(KERN_INFO "usbmidi: found [ %s ] (0x%04x:0x%04x), attached:\n", u->deviceName, u->idVendor, u->idProduct );
+	for ( i=0 ; i<devices ; i++ ) {
+		int dm = (mdevs[i]->dev_midi-2)>>4;
+		if ( mdevs[i]->mout.ep != NULL && mdevs[i]->min.ep != NULL ) {
+			printk(KERN_INFO "usbmidi: /dev/midi%02d: in (ep:%02x cid:%2d bufsiz:%2d) out (ep:%02x cid:%2d bufsiz:%2d)\n", 
+			       dm,
+			       mdevs[i]->min.ep->endpoint|USB_DIR_IN, mdevs[i]->min.cableId, mdevs[i]->min.ep->recvBufSize,
+			       mdevs[i]->mout.ep->endpoint, mdevs[i]->mout.cableId, mdevs[i]->mout.ep->bufSize);
+		} else if ( mdevs[i]->min.ep != NULL ) {
+			printk(KERN_INFO "usbmidi: /dev/midi%02d: in (ep:%02x cid:%2d bufsiz:%02d)\n", 
+			       dm,
+			       mdevs[i]->min.ep->endpoint|USB_DIR_IN, mdevs[i]->min.cableId, mdevs[i]->min.ep->recvBufSize);
+		} else if ( mdevs[i]->mout.ep != NULL ) {
+			printk(KERN_INFO "usbmidi: /dev/midi%02d: out (ep:%02x cid:%2d bufsiz:%02d)\n", 
+			       dm,
+			       mdevs[i]->mout.ep->endpoint, mdevs[i]->mout.cableId, mdevs[i]->mout.ep->bufSize);
+		}
+	}
+
+	kfree(mdevs);
+	return 0;
+
+ error_end:
+	if ( mdevs != NULL ) {
+		for ( i=0 ; i<devices ; i++ ) {
+			if ( mdevs[i] != NULL ) {
+				unregister_sound_midi( mdevs[i]->dev_midi );
+				kfree(mdevs[i]);
+			}
+		}
+		kfree(mdevs);
+	}
+
+	for ( i=0 ; i<15 ; i++ ) {
+		if ( mins[i] != NULL ) {
+			remove_midi_in_endpoint( mins[i] );
+		}
+		if ( mouts[i] != NULL ) {
+			remove_midi_out_endpoint( mouts[i] );
+		}
+	}
+
+	return -ENOMEM;
+}
+
+/* ------------------------------------------------------------------------- */
+
+/** Attempt to scan YAMAHA's device descriptor and detect correct values of
+ *  them.
+ *  Return 0 on succes, negative on failure.
+ *  Called by usb_midi_probe();
+ **/
+
+static int detect_yamaha_device( struct usb_device *d,
+		struct usb_interface *iface, unsigned int ifnum,
+		struct usb_midi_state *s)
+{
+	struct usb_host_interface *interface;
+	struct usb_midi_device *u;
+	unsigned char *buffer;
+	int bufSize;
+	int i;
+	int alts=-1;
+	int ret;
+
+	if (le16_to_cpu(d->descriptor.idVendor) != USB_VENDOR_ID_YAMAHA) {
+		return -EINVAL;
+	}
+
+	for ( i=0 ; i < iface->num_altsetting; i++ ) {
+		interface = iface->altsetting + i;
+
+		if ( interface->desc.bInterfaceClass != 255 ||
+		     interface->desc.bInterfaceSubClass != 0 )
+			continue;
+		alts = interface->desc.bAlternateSetting;
+	}
+	if ( alts == -1 ) {
+		return -EINVAL;
+	}
+
+	printk(KERN_INFO "usb-midi: Found YAMAHA USB-MIDI device on dev %04x:%04x, iface %d\n",
+	       le16_to_cpu(d->descriptor.idVendor),
+	       le16_to_cpu(d->descriptor.idProduct), ifnum);
+
+	i = d->actconfig - d->config;
+	buffer = d->rawdescriptors[i];
+	bufSize = le16_to_cpu(d->actconfig->desc.wTotalLength);
+
+	u = parse_descriptor( d, buffer, bufSize, ifnum, alts, 1);
+	if ( u == NULL ) {
+		return -EINVAL;
+	}
+
+	ret = alloc_usb_midi_device( d, s, u );
+
+	kfree(u);
+
+	return ret;
+}
+
+
+/** Scan table of known devices which are only partially compliant with 
+ * the MIDIStreaming specification.
+ * Called by usb_midi_probe();
+ *
+ **/
+
+static int detect_vendor_specific_device( struct usb_device *d, unsigned int ifnum, struct usb_midi_state *s )
+{
+	struct usb_midi_device *u;
+	int i;
+	int ret = -ENXIO;
+
+	for ( i=0; i<VENDOR_SPECIFIC_USB_MIDI_DEVICES ; i++ ) {
+		u=&(usb_midi_devices[i]);
+    
+		if ( le16_to_cpu(d->descriptor.idVendor) != u->idVendor ||
+		     le16_to_cpu(d->descriptor.idProduct) != u->idProduct ||
+		     ifnum != u->interface )
+			continue;
+
+		ret = alloc_usb_midi_device( d, s, u );
+		break;
+	}
+
+	return ret;
+}
+
+
+/** Attempt to match any config of an interface to a MIDISTREAMING interface.
+ *  Returns 0 on success, negative on failure.
+ * Called by usb_midi_probe();
+ **/
+static int detect_midi_subclass(struct usb_device *d,
+		struct usb_interface *iface, unsigned int ifnum,
+		struct usb_midi_state *s)
+{
+	struct usb_host_interface *interface;
+	struct usb_midi_device *u;
+	unsigned char *buffer;
+	int bufSize;
+	int i;
+	int alts=-1;
+	int ret;
+
+	for ( i=0 ; i < iface->num_altsetting; i++ ) {
+		interface = iface->altsetting + i;
+
+		if ( interface->desc.bInterfaceClass != USB_CLASS_AUDIO ||
+		     interface->desc.bInterfaceSubClass != USB_SUBCLASS_MIDISTREAMING )
+			continue;
+		alts = interface->desc.bAlternateSetting;
+	}
+	if ( alts == -1 ) {
+		return -EINVAL;
+	}
+
+	printk(KERN_INFO "usb-midi: Found MIDISTREAMING on dev %04x:%04x, iface %d\n",
+	       le16_to_cpu(d->descriptor.idVendor), 
+	       le16_to_cpu(d->descriptor.idProduct), ifnum);
+
+
+	/* From USB Spec v2.0, Section 9.5.
+	   If the class or vendor specific descriptors use the same format
+	   as standard descriptors (e.g., start with a length byte and
+	   followed by a type byte), they must be returned interleaved with
+	   standard descriptors in the configuration information returned by
+	   a GetDescriptor(Configuration) request. In this case, the class
+	   or vendor-specific descriptors must follow a related standard
+	   descriptor they modify or extend.
+	*/
+
+	i = d->actconfig - d->config;
+	buffer = d->rawdescriptors[i];
+	bufSize = le16_to_cpu(d->actconfig->desc.wTotalLength);
+
+	u = parse_descriptor( d, buffer, bufSize, ifnum, alts, 0);
+	if ( u == NULL ) {
+		return -EINVAL;
+	}
+
+	ret = alloc_usb_midi_device( d, s, u );
+
+	kfree(u);
+
+	return ret;
+}
+
+
+/** When user has requested a specific device, match it exactly.
+ *
+ * Uses uvendor, uproduct, uinterface, ualt, umin, umout and ucable.
+ * Called by usb_midi_probe();
+ *
+ **/
+static int detect_by_hand(struct usb_device *d, unsigned int ifnum, struct usb_midi_state *s)
+{
+	struct usb_midi_device u;
+
+	if ( le16_to_cpu(d->descriptor.idVendor) != uvendor ||
+	     le16_to_cpu(d->descriptor.idProduct) != uproduct ||
+	     ifnum != uinterface ) {
+		return -EINVAL;
+	}
+
+	if ( ualt < 0 )
+		ualt = -1;
+
+	if ( umin   < 0 || umin   > 15 )
+		umin   = 0x01 | USB_DIR_IN;
+	if ( umout  < 0 || umout  > 15 )
+		umout  = 0x01;
+	if ( ucable < 0 || ucable > 15 )
+		ucable = 0;
+
+	u.deviceName = NULL; /* A flag for alloc_usb_midi_device to get device
+				name from device. */
+	u.idVendor   = uvendor;
+	u.idProduct  = uproduct;
+	u.interface  = uinterface;
+	u.altSetting = ualt;
+
+	u.in[0].endpoint    = umin;
+	u.in[0].cableId     = (1<<ucable);
+
+	u.out[0].endpoint   = umout;
+	u.out[0].cableId    = (1<<ucable);
+
+	return alloc_usb_midi_device( d, s, &u );
+}
+
+
+
+/* ------------------------------------------------------------------------- */
+
+static int usb_midi_probe(struct usb_interface *intf, 
+			  const struct usb_device_id *id)
+{
+	struct usb_midi_state *s;
+	struct usb_device *dev = interface_to_usbdev(intf);
+	int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
+
+	s = (struct usb_midi_state *)kmalloc(sizeof(struct usb_midi_state), GFP_KERNEL);
+	if ( !s )
+		return -ENOMEM;
+
+	memset( s, 0, sizeof(struct usb_midi_state) );
+	INIT_LIST_HEAD(&s->midiDevList);
+	INIT_LIST_HEAD(&s->inEndpointList);
+	INIT_LIST_HEAD(&s->outEndpointList);
+	s->usbdev = dev;
+	s->count  = 0;
+	spin_lock_init(&s->lock);
+
+	if (
+		detect_by_hand( dev, ifnum, s ) &&
+		detect_midi_subclass( dev, intf, ifnum, s ) &&
+		detect_vendor_specific_device( dev, ifnum, s ) &&
+		detect_yamaha_device( dev, intf, ifnum, s) ) {
+		kfree(s);
+		return -EIO;
+	}
+
+	down(&open_sem);
+	list_add_tail(&s->mididev, &mididevs);
+	up(&open_sem);
+
+	usb_set_intfdata (intf, s);
+	return 0;
+}
+
+
+static void usb_midi_disconnect(struct usb_interface *intf)
+{
+	struct usb_midi_state *s = usb_get_intfdata (intf);
+	struct usb_mididev    *m;
+
+	if ( !s )
+		return;
+
+	if ( s == (struct usb_midi_state *)-1 ) {
+		return;
+	}
+	if ( !s->usbdev ) {
+		return;
+	}
+	down(&open_sem);
+	list_del(&s->mididev);
+	INIT_LIST_HEAD(&s->mididev);
+	s->usbdev = NULL;
+	usb_set_intfdata (intf, NULL);
+
+	list_for_each_entry(m, &s->midiDevList, list) {
+		wake_up(&(m->min.ep->wait));
+		wake_up(&(m->mout.ep->wait));
+		if ( m->dev_midi >= 0 ) {
+			unregister_sound_midi(m->dev_midi);
+		}
+		m->dev_midi = -1;
+	}
+	release_midi_device(s);
+	wake_up(&open_wait);
+}
+
+/* we want to look at all devices by hand */
+static struct usb_device_id id_table[] = {
+	{.driver_info = 42},
+	{}
+};
+
+static struct usb_driver usb_midi_driver = {
+	.owner =	THIS_MODULE,
+	.name =		"midi",
+	.probe =	usb_midi_probe,
+	.disconnect =	usb_midi_disconnect,
+	.id_table =	id_table,
+};
+
+/* ------------------------------------------------------------------------- */
+
+static int __init usb_midi_init(void)
+{
+	return usb_register(&usb_midi_driver);
+}
+
+static void __exit usb_midi_exit(void)
+{
+	usb_deregister(&usb_midi_driver);
+}
+
+module_init(usb_midi_init) ;
+module_exit(usb_midi_exit) ;
+
+#ifdef HAVE_ALSA_SUPPORT
+#define SNDRV_MAIN_OBJECT_FILE
+#include "../../include/driver.h"
+#include "../../include/control.h"
+#include "../../include/info.h"
+#include "../../include/cs46xx.h"
+
+/* ------------------------------------------------------------------------- */
+
+static int snd_usbmidi_input_close(snd_rawmidi_substream_t * substream)
+{
+	return 0;
+}
+
+static int snd_usbmidi_input_open(snd_rawmidi_substream_t * substream )
+{
+	return 0;
+}
+
+static void snd_usbmidi_input_trigger(snd_rawmidi_substream_t * substream, int up)
+{
+	return 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+static int snd_usbmidi_output_close(snd_rawmidi_substream_t * substream)
+{
+	return 0;
+}
+
+static int snd_usbmidi_output_open(snd_rawmidi_substream_t * substream)
+{
+	return 0;
+}
+
+static void snd_usb_midi_output_trigger(snd_rawmidi_substream_t * substream,
+					int up)
+{
+	return 0;
+}
+
+/* ------------------------------------------------------------------------- */
+
+static snd_rawmidi_ops_t snd_usbmidi_output =
+{
+        .open =         snd_usbmidi_output_open,
+        .close =        snd_usbmidi_output_close,
+        .trigger =      snd_usbmidi_output_trigger,
+};
+static snd_rawmidi_ops_t snd_usbmidi_input =
+{
+        .open =         snd_usbmidi_input_open,
+        .close =        snd_usbmidi_input_close,
+        .trigger =      snd_usbmidi_input_trigger,
+};
+
+int snd_usbmidi_midi(cs46xx_t *chip, int device, snd_rawmidi_t **rrawmidi)
+{
+	snd_rawmidi_t *rmidi;
+	int err;
+
+	if (rrawmidi)
+		*rrawmidi = NULL;
+	if ((err = snd_rawmidi_new(chip->card, "USB-MIDI", device, 1, 1, &rmidi)) < 0)
+		return err;
+	strcpy(rmidi->name, "USB-MIDI");
+
+	snd_rawmidi_set_ops( rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output );
+	snd_rawmidi_set_ops( rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input );
+
+	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
+
+	rmidi->private_data = chip;
+	chip->rmidi = rmidi;
+	if (rrawmidi)
+		*rrawmidi = NULL;
+
+	return 0;
+}
+
+int snd_usbmidi_create( snd_card_t * card,
+			struct pci_dev * pci,
+			usbmidi_t ** rchip )
+{
+	usbmidi_t *chip;
+	int err, idx;
+	snd_region_t *region;
+	static snd_device_opt_t ops = {
+		.dev_free = snd_usbmidi_dev_free,
+	};
+
+	*rchip = NULL;
+	chip = snd_magic_kcalloc( usbmidi_t, 0, GFP_KERNEL );
+	if ( chip == NULL )
+		return -ENOMEM;
+}
+
+EXPORT_SYMBOL(snd_usbmidi_create);
+EXPORT_SYMBOL(snd_usbmidi_midi);
+#endif /* HAVE_ALSA_SUPPORT */
+