xref: /openbmc/linux/sound/drivers/mtpav.c (revision e23feb16)
1 /*
2  *      MOTU Midi Timepiece ALSA Main routines
3  *      Copyright by Michael T. Mayers (c) Jan 09, 2000
4  *      mail: michael@tweakoz.com
5  *      Thanks to John Galbraith
6  *
7  *      This program is free software; you can redistribute it and/or modify
8  *      it under the terms of the GNU General Public License as published by
9  *      the Free Software Foundation; either version 2 of the License, or
10  *      (at your option) any later version.
11  *
12  *      This program is distributed in the hope that it will be useful,
13  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *      GNU General Public License for more details.
16  *
17  *      You should have received a copy of the GNU General Public License
18  *      along with this program; if not, write to the Free Software
19  *      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20  *
21  *
22  *      This driver is for the 'Mark Of The Unicorn' (MOTU)
23  *      MidiTimePiece AV multiport MIDI interface
24  *
25  *      IOPORTS
26  *      -------
27  *      8 MIDI Ins and 8 MIDI outs
28  *      Video Sync In (BNC), Word Sync Out (BNC),
29  *      ADAT Sync Out (DB9)
30  *      SMPTE in/out (1/4")
31  *      2 programmable pedal/footswitch inputs and 4 programmable MIDI controller knobs.
32  *      Macintosh RS422 serial port
33  *      RS422 "network" port for ganging multiple MTP's
34  *      PC Parallel Port ( which this driver currently uses )
35  *
36  *      MISC FEATURES
37  *      -------------
38  *      Hardware MIDI routing, merging, and filtering
39  *      MIDI Synchronization to Video, ADAT, SMPTE and other Clock sources
40  *      128 'scene' memories, recallable from MIDI program change
41  *
42  *
43  * ChangeLog
44  * Jun 11 2001	Takashi Iwai <tiwai@suse.de>
45  *      - Recoded & debugged
46  *      - Added timer interrupt for midi outputs
47  *      - hwports is between 1 and 8, which specifies the number of hardware ports.
48  *        The three global ports, computer, adat and broadcast ports, are created
49  *        always after h/w and remote ports.
50  *
51  */
52 
53 #include <linux/init.h>
54 #include <linux/interrupt.h>
55 #include <linux/module.h>
56 #include <linux/err.h>
57 #include <linux/platform_device.h>
58 #include <linux/ioport.h>
59 #include <linux/io.h>
60 #include <linux/moduleparam.h>
61 #include <sound/core.h>
62 #include <sound/initval.h>
63 #include <sound/rawmidi.h>
64 #include <linux/delay.h>
65 
66 /*
67  *      globals
68  */
69 MODULE_AUTHOR("Michael T. Mayers");
70 MODULE_DESCRIPTION("MOTU MidiTimePiece AV multiport MIDI");
71 MODULE_LICENSE("GPL");
72 MODULE_SUPPORTED_DEVICE("{{MOTU,MidiTimePiece AV multiport MIDI}}");
73 
74 // io resources
75 #define MTPAV_IOBASE		0x378
76 #define MTPAV_IRQ		7
77 #define MTPAV_MAX_PORTS		8
78 
79 static int index = SNDRV_DEFAULT_IDX1;
80 static char *id = SNDRV_DEFAULT_STR1;
81 static long port = MTPAV_IOBASE;	/* 0x378, 0x278 */
82 static int irq = MTPAV_IRQ;		/* 7, 5 */
83 static int hwports = MTPAV_MAX_PORTS;	/* use hardware ports 1-8 */
84 
85 module_param(index, int, 0444);
86 MODULE_PARM_DESC(index, "Index value for MotuMTPAV MIDI.");
87 module_param(id, charp, 0444);
88 MODULE_PARM_DESC(id, "ID string for MotuMTPAV MIDI.");
89 module_param(port, long, 0444);
90 MODULE_PARM_DESC(port, "Parallel port # for MotuMTPAV MIDI.");
91 module_param(irq, int, 0444);
92 MODULE_PARM_DESC(irq, "Parallel IRQ # for MotuMTPAV MIDI.");
93 module_param(hwports, int, 0444);
94 MODULE_PARM_DESC(hwports, "Hardware ports # for MotuMTPAV MIDI.");
95 
96 static struct platform_device *device;
97 
98 /*
99  *      defines
100  */
101 //#define USE_FAKE_MTP //       don't actually read/write to MTP device (for debugging without an actual unit) (does not work yet)
102 
103 // parallel port usage masks
104 #define SIGS_BYTE 0x08
105 #define SIGS_RFD 0x80
106 #define SIGS_IRQ 0x40
107 #define SIGS_IN0 0x10
108 #define SIGS_IN1 0x20
109 
110 #define SIGC_WRITE 0x04
111 #define SIGC_READ 0x08
112 #define SIGC_INTEN 0x10
113 
114 #define DREG 0
115 #define SREG 1
116 #define CREG 2
117 
118 //
119 #define MTPAV_MODE_INPUT_OPENED		0x01
120 #define MTPAV_MODE_OUTPUT_OPENED	0x02
121 #define MTPAV_MODE_INPUT_TRIGGERED	0x04
122 #define MTPAV_MODE_OUTPUT_TRIGGERED	0x08
123 
124 #define NUMPORTS (0x12+1)
125 
126 
127 /*
128  */
129 
130 struct mtpav_port {
131 	u8 number;
132 	u8 hwport;
133 	u8 mode;
134 	u8 running_status;
135 	struct snd_rawmidi_substream *input;
136 	struct snd_rawmidi_substream *output;
137 };
138 
139 struct mtpav {
140 	struct snd_card *card;
141 	unsigned long port;
142 	struct resource *res_port;
143 	int irq;			/* interrupt (for inputs) */
144 	spinlock_t spinlock;
145 	int share_irq;			/* number of accesses to input interrupts */
146 	int istimer;			/* number of accesses to timer interrupts */
147 	struct timer_list timer;	/* timer interrupts for outputs */
148 	struct snd_rawmidi *rmidi;
149 	int num_ports;		/* number of hw ports (1-8) */
150 	struct mtpav_port ports[NUMPORTS];	/* all ports including computer, adat and bc */
151 
152 	u32 inmidiport;		/* selected input midi port */
153 	u32 inmidistate;	/* during midi command 0xf5 */
154 
155 	u32 outmidihwport;	/* selected output midi hw port */
156 };
157 
158 
159 /*
160  * possible hardware ports (selected by 0xf5 port message)
161  *      0x00		all ports
162  *      0x01 .. 0x08    this MTP's ports 1..8
163  *      0x09 .. 0x10    networked MTP's ports (9..16)
164  *      0x11            networked MTP's computer port
165  *      0x63            to ADAT
166  *
167  * mappig:
168  *  subdevice 0 - (X-1)    ports
169  *            X - (2*X-1)  networked ports
170  *            X            computer
171  *            X+1          ADAT
172  *            X+2          all ports
173  *
174  *  where X = chip->num_ports
175  */
176 
177 #define MTPAV_PIDX_COMPUTER	0
178 #define MTPAV_PIDX_ADAT		1
179 #define MTPAV_PIDX_BROADCAST	2
180 
181 
182 static int translate_subdevice_to_hwport(struct mtpav *chip, int subdev)
183 {
184 	if (subdev < 0)
185 		return 0x01; /* invalid - use port 0 as default */
186 	else if (subdev < chip->num_ports)
187 		return subdev + 1; /* single mtp port */
188 	else if (subdev < chip->num_ports * 2)
189 		return subdev - chip->num_ports + 0x09; /* remote port */
190 	else if (subdev == chip->num_ports * 2 + MTPAV_PIDX_COMPUTER)
191 		return 0x11; /* computer port */
192 	else if (subdev == chip->num_ports + MTPAV_PIDX_ADAT)
193 		return 0x63;		/* ADAT */
194 	return 0; /* all ports */
195 }
196 
197 static int translate_hwport_to_subdevice(struct mtpav *chip, int hwport)
198 {
199 	int p;
200 	if (hwport <= 0x00) /* all ports */
201 		return chip->num_ports + MTPAV_PIDX_BROADCAST;
202 	else if (hwport <= 0x08) { /* single port */
203 		p = hwport - 1;
204 		if (p >= chip->num_ports)
205 			p = 0;
206 		return p;
207 	} else if (hwport <= 0x10) { /* remote port */
208 		p = hwport - 0x09 + chip->num_ports;
209 		if (p >= chip->num_ports * 2)
210 			p = chip->num_ports;
211 		return p;
212 	} else if (hwport == 0x11)  /* computer port */
213 		return chip->num_ports + MTPAV_PIDX_COMPUTER;
214 	else  /* ADAT */
215 		return chip->num_ports + MTPAV_PIDX_ADAT;
216 }
217 
218 
219 /*
220  */
221 
222 static u8 snd_mtpav_getreg(struct mtpav *chip, u16 reg)
223 {
224 	u8 rval = 0;
225 
226 	if (reg == SREG) {
227 		rval = inb(chip->port + SREG);
228 		rval = (rval & 0xf8);
229 	} else if (reg == CREG) {
230 		rval = inb(chip->port + CREG);
231 		rval = (rval & 0x1c);
232 	}
233 
234 	return rval;
235 }
236 
237 /*
238  */
239 
240 static inline void snd_mtpav_mputreg(struct mtpav *chip, u16 reg, u8 val)
241 {
242 	if (reg == DREG || reg == CREG)
243 		outb(val, chip->port + reg);
244 }
245 
246 /*
247  */
248 
249 static void snd_mtpav_wait_rfdhi(struct mtpav *chip)
250 {
251 	int counts = 10000;
252 	u8 sbyte;
253 
254 	sbyte = snd_mtpav_getreg(chip, SREG);
255 	while (!(sbyte & SIGS_RFD) && counts--) {
256 		sbyte = snd_mtpav_getreg(chip, SREG);
257 		udelay(10);
258 	}
259 }
260 
261 static void snd_mtpav_send_byte(struct mtpav *chip, u8 byte)
262 {
263 	u8 tcbyt;
264 	u8 clrwrite;
265 	u8 setwrite;
266 
267 	snd_mtpav_wait_rfdhi(chip);
268 
269 	/////////////////
270 
271 	tcbyt = snd_mtpav_getreg(chip, CREG);
272 	clrwrite = tcbyt & (SIGC_WRITE ^ 0xff);
273 	setwrite = tcbyt | SIGC_WRITE;
274 
275 	snd_mtpav_mputreg(chip, DREG, byte);
276 	snd_mtpav_mputreg(chip, CREG, clrwrite);	// clear write bit
277 
278 	snd_mtpav_mputreg(chip, CREG, setwrite);	// set write bit
279 
280 }
281 
282 
283 /*
284  */
285 
286 /* call this with spin lock held */
287 static void snd_mtpav_output_port_write(struct mtpav *mtp_card,
288 					struct mtpav_port *portp,
289 					struct snd_rawmidi_substream *substream)
290 {
291 	u8 outbyte;
292 
293 	// Get the outbyte first, so we can emulate running status if
294 	// necessary
295 	if (snd_rawmidi_transmit(substream, &outbyte, 1) != 1)
296 		return;
297 
298 	// send port change command if necessary
299 
300 	if (portp->hwport != mtp_card->outmidihwport) {
301 		mtp_card->outmidihwport = portp->hwport;
302 
303 		snd_mtpav_send_byte(mtp_card, 0xf5);
304 		snd_mtpav_send_byte(mtp_card, portp->hwport);
305 		/*
306 		snd_printk(KERN_DEBUG "new outport: 0x%x\n",
307 			   (unsigned int) portp->hwport);
308 		*/
309 		if (!(outbyte & 0x80) && portp->running_status)
310 			snd_mtpav_send_byte(mtp_card, portp->running_status);
311 	}
312 
313 	// send data
314 
315 	do {
316 		if (outbyte & 0x80)
317 			portp->running_status = outbyte;
318 
319 		snd_mtpav_send_byte(mtp_card, outbyte);
320 	} while (snd_rawmidi_transmit(substream, &outbyte, 1) == 1);
321 }
322 
323 static void snd_mtpav_output_write(struct snd_rawmidi_substream *substream)
324 {
325 	struct mtpav *mtp_card = substream->rmidi->private_data;
326 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
327 	unsigned long flags;
328 
329 	spin_lock_irqsave(&mtp_card->spinlock, flags);
330 	snd_mtpav_output_port_write(mtp_card, portp, substream);
331 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
332 }
333 
334 
335 /*
336  *      mtpav control
337  */
338 
339 static void snd_mtpav_portscan(struct mtpav *chip)	// put mtp into smart routing mode
340 {
341 	u8 p;
342 
343 	for (p = 0; p < 8; p++) {
344 		snd_mtpav_send_byte(chip, 0xf5);
345 		snd_mtpav_send_byte(chip, p);
346 		snd_mtpav_send_byte(chip, 0xfe);
347 	}
348 }
349 
350 /*
351  */
352 
353 static int snd_mtpav_input_open(struct snd_rawmidi_substream *substream)
354 {
355 	struct mtpav *mtp_card = substream->rmidi->private_data;
356 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
357 	unsigned long flags;
358 
359 	spin_lock_irqsave(&mtp_card->spinlock, flags);
360 	portp->mode |= MTPAV_MODE_INPUT_OPENED;
361 	portp->input = substream;
362 	if (mtp_card->share_irq++ == 0)
363 		snd_mtpav_mputreg(mtp_card, CREG, (SIGC_INTEN | SIGC_WRITE));	// enable pport interrupts
364 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
365 	return 0;
366 }
367 
368 /*
369  */
370 
371 static int snd_mtpav_input_close(struct snd_rawmidi_substream *substream)
372 {
373 	struct mtpav *mtp_card = substream->rmidi->private_data;
374 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
375 	unsigned long flags;
376 
377 	spin_lock_irqsave(&mtp_card->spinlock, flags);
378 	portp->mode &= ~MTPAV_MODE_INPUT_OPENED;
379 	portp->input = NULL;
380 	if (--mtp_card->share_irq == 0)
381 		snd_mtpav_mputreg(mtp_card, CREG, 0);	// disable pport interrupts
382 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
383 	return 0;
384 }
385 
386 /*
387  */
388 
389 static void snd_mtpav_input_trigger(struct snd_rawmidi_substream *substream, int up)
390 {
391 	struct mtpav *mtp_card = substream->rmidi->private_data;
392 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
393 	unsigned long flags;
394 
395 	spin_lock_irqsave(&mtp_card->spinlock, flags);
396 	if (up)
397 		portp->mode |= MTPAV_MODE_INPUT_TRIGGERED;
398 	else
399 		portp->mode &= ~MTPAV_MODE_INPUT_TRIGGERED;
400 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
401 
402 }
403 
404 
405 /*
406  * timer interrupt for outputs
407  */
408 
409 static void snd_mtpav_output_timer(unsigned long data)
410 {
411 	unsigned long flags;
412 	struct mtpav *chip = (struct mtpav *)data;
413 	int p;
414 
415 	spin_lock_irqsave(&chip->spinlock, flags);
416 	/* reprogram timer */
417 	chip->timer.expires = 1 + jiffies;
418 	add_timer(&chip->timer);
419 	/* process each port */
420 	for (p = 0; p <= chip->num_ports * 2 + MTPAV_PIDX_BROADCAST; p++) {
421 		struct mtpav_port *portp = &chip->ports[p];
422 		if ((portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED) && portp->output)
423 			snd_mtpav_output_port_write(chip, portp, portp->output);
424 	}
425 	spin_unlock_irqrestore(&chip->spinlock, flags);
426 }
427 
428 /* spinlock held! */
429 static void snd_mtpav_add_output_timer(struct mtpav *chip)
430 {
431 	chip->timer.expires = 1 + jiffies;
432 	add_timer(&chip->timer);
433 }
434 
435 /* spinlock held! */
436 static void snd_mtpav_remove_output_timer(struct mtpav *chip)
437 {
438 	del_timer(&chip->timer);
439 }
440 
441 /*
442  */
443 
444 static int snd_mtpav_output_open(struct snd_rawmidi_substream *substream)
445 {
446 	struct mtpav *mtp_card = substream->rmidi->private_data;
447 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
448 	unsigned long flags;
449 
450 	spin_lock_irqsave(&mtp_card->spinlock, flags);
451 	portp->mode |= MTPAV_MODE_OUTPUT_OPENED;
452 	portp->output = substream;
453 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
454 	return 0;
455 };
456 
457 /*
458  */
459 
460 static int snd_mtpav_output_close(struct snd_rawmidi_substream *substream)
461 {
462 	struct mtpav *mtp_card = substream->rmidi->private_data;
463 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
464 	unsigned long flags;
465 
466 	spin_lock_irqsave(&mtp_card->spinlock, flags);
467 	portp->mode &= ~MTPAV_MODE_OUTPUT_OPENED;
468 	portp->output = NULL;
469 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
470 	return 0;
471 };
472 
473 /*
474  */
475 
476 static void snd_mtpav_output_trigger(struct snd_rawmidi_substream *substream, int up)
477 {
478 	struct mtpav *mtp_card = substream->rmidi->private_data;
479 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
480 	unsigned long flags;
481 
482 	spin_lock_irqsave(&mtp_card->spinlock, flags);
483 	if (up) {
484 		if (! (portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED)) {
485 			if (mtp_card->istimer++ == 0)
486 				snd_mtpav_add_output_timer(mtp_card);
487 			portp->mode |= MTPAV_MODE_OUTPUT_TRIGGERED;
488 		}
489 	} else {
490 		portp->mode &= ~MTPAV_MODE_OUTPUT_TRIGGERED;
491 		if (--mtp_card->istimer == 0)
492 			snd_mtpav_remove_output_timer(mtp_card);
493 	}
494 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
495 
496 	if (up)
497 		snd_mtpav_output_write(substream);
498 }
499 
500 /*
501  * midi interrupt for inputs
502  */
503 
504 static void snd_mtpav_inmidi_process(struct mtpav *mcrd, u8 inbyte)
505 {
506 	struct mtpav_port *portp;
507 
508 	if ((int)mcrd->inmidiport > mcrd->num_ports * 2 + MTPAV_PIDX_BROADCAST)
509 		return;
510 
511 	portp = &mcrd->ports[mcrd->inmidiport];
512 	if (portp->mode & MTPAV_MODE_INPUT_TRIGGERED)
513 		snd_rawmidi_receive(portp->input, &inbyte, 1);
514 }
515 
516 static void snd_mtpav_inmidi_h(struct mtpav *mcrd, u8 inbyte)
517 {
518 	if (inbyte >= 0xf8) {
519 		/* real-time midi code */
520 		snd_mtpav_inmidi_process(mcrd, inbyte);
521 		return;
522 	}
523 
524 	if (mcrd->inmidistate == 0) {	// awaiting command
525 		if (inbyte == 0xf5)	// MTP port #
526 			mcrd->inmidistate = 1;
527 		else
528 			snd_mtpav_inmidi_process(mcrd, inbyte);
529 	} else if (mcrd->inmidistate) {
530 		mcrd->inmidiport = translate_hwport_to_subdevice(mcrd, inbyte);
531 		mcrd->inmidistate = 0;
532 	}
533 }
534 
535 static void snd_mtpav_read_bytes(struct mtpav *mcrd)
536 {
537 	u8 clrread, setread;
538 	u8 mtp_read_byte;
539 	u8 sr, cbyt;
540 	int i;
541 
542 	u8 sbyt = snd_mtpav_getreg(mcrd, SREG);
543 
544 	/* printk(KERN_DEBUG "snd_mtpav_read_bytes() sbyt: 0x%x\n", sbyt); */
545 
546 	if (!(sbyt & SIGS_BYTE))
547 		return;
548 
549 	cbyt = snd_mtpav_getreg(mcrd, CREG);
550 	clrread = cbyt & (SIGC_READ ^ 0xff);
551 	setread = cbyt | SIGC_READ;
552 
553 	do {
554 
555 		mtp_read_byte = 0;
556 		for (i = 0; i < 4; i++) {
557 			snd_mtpav_mputreg(mcrd, CREG, setread);
558 			sr = snd_mtpav_getreg(mcrd, SREG);
559 			snd_mtpav_mputreg(mcrd, CREG, clrread);
560 
561 			sr &= SIGS_IN0 | SIGS_IN1;
562 			sr >>= 4;
563 			mtp_read_byte |= sr << (i * 2);
564 		}
565 
566 		snd_mtpav_inmidi_h(mcrd, mtp_read_byte);
567 
568 		sbyt = snd_mtpav_getreg(mcrd, SREG);
569 
570 	} while (sbyt & SIGS_BYTE);
571 }
572 
573 static irqreturn_t snd_mtpav_irqh(int irq, void *dev_id)
574 {
575 	struct mtpav *mcard = dev_id;
576 
577 	spin_lock(&mcard->spinlock);
578 	snd_mtpav_read_bytes(mcard);
579 	spin_unlock(&mcard->spinlock);
580 	return IRQ_HANDLED;
581 }
582 
583 /*
584  * get ISA resources
585  */
586 static int snd_mtpav_get_ISA(struct mtpav *mcard)
587 {
588 	if ((mcard->res_port = request_region(port, 3, "MotuMTPAV MIDI")) == NULL) {
589 		snd_printk(KERN_ERR "MTVAP port 0x%lx is busy\n", port);
590 		return -EBUSY;
591 	}
592 	mcard->port = port;
593 	if (request_irq(irq, snd_mtpav_irqh, 0, "MOTU MTPAV", mcard)) {
594 		snd_printk(KERN_ERR "MTVAP IRQ %d busy\n", irq);
595 		return -EBUSY;
596 	}
597 	mcard->irq = irq;
598 	return 0;
599 }
600 
601 
602 /*
603  */
604 
605 static struct snd_rawmidi_ops snd_mtpav_output = {
606 	.open =		snd_mtpav_output_open,
607 	.close =	snd_mtpav_output_close,
608 	.trigger =	snd_mtpav_output_trigger,
609 };
610 
611 static struct snd_rawmidi_ops snd_mtpav_input = {
612 	.open =		snd_mtpav_input_open,
613 	.close =	snd_mtpav_input_close,
614 	.trigger =	snd_mtpav_input_trigger,
615 };
616 
617 
618 /*
619  * get RAWMIDI resources
620  */
621 
622 static void snd_mtpav_set_name(struct mtpav *chip,
623 			       struct snd_rawmidi_substream *substream)
624 {
625 	if (substream->number >= 0 && substream->number < chip->num_ports)
626 		sprintf(substream->name, "MTP direct %d", (substream->number % chip->num_ports) + 1);
627 	else if (substream->number >= 8 && substream->number < chip->num_ports * 2)
628 		sprintf(substream->name, "MTP remote %d", (substream->number % chip->num_ports) + 1);
629 	else if (substream->number == chip->num_ports * 2)
630 		strcpy(substream->name, "MTP computer");
631 	else if (substream->number == chip->num_ports * 2 + 1)
632 		strcpy(substream->name, "MTP ADAT");
633 	else
634 		strcpy(substream->name, "MTP broadcast");
635 }
636 
637 static int snd_mtpav_get_RAWMIDI(struct mtpav *mcard)
638 {
639 	int rval;
640 	struct snd_rawmidi *rawmidi;
641 	struct snd_rawmidi_substream *substream;
642 	struct list_head *list;
643 
644 	if (hwports < 1)
645 		hwports = 1;
646 	else if (hwports > 8)
647 		hwports = 8;
648 	mcard->num_ports = hwports;
649 
650 	if ((rval = snd_rawmidi_new(mcard->card, "MotuMIDI", 0,
651 				    mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
652 				    mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
653 				    &mcard->rmidi)) < 0)
654 		return rval;
655 	rawmidi = mcard->rmidi;
656 	rawmidi->private_data = mcard;
657 
658 	list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
659 		substream = list_entry(list, struct snd_rawmidi_substream, list);
660 		snd_mtpav_set_name(mcard, substream);
661 		substream->ops = &snd_mtpav_input;
662 	}
663 	list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
664 		substream = list_entry(list, struct snd_rawmidi_substream, list);
665 		snd_mtpav_set_name(mcard, substream);
666 		substream->ops = &snd_mtpav_output;
667 		mcard->ports[substream->number].hwport = translate_subdevice_to_hwport(mcard, substream->number);
668 	}
669 	rawmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT |
670 			       SNDRV_RAWMIDI_INFO_DUPLEX;
671 	sprintf(rawmidi->name, "MTP AV MIDI");
672 	return 0;
673 }
674 
675 /*
676  */
677 
678 static void snd_mtpav_free(struct snd_card *card)
679 {
680 	struct mtpav *crd = card->private_data;
681 	unsigned long flags;
682 
683 	spin_lock_irqsave(&crd->spinlock, flags);
684 	if (crd->istimer > 0)
685 		snd_mtpav_remove_output_timer(crd);
686 	spin_unlock_irqrestore(&crd->spinlock, flags);
687 	if (crd->irq >= 0)
688 		free_irq(crd->irq, (void *)crd);
689 	release_and_free_resource(crd->res_port);
690 }
691 
692 /*
693  */
694 static int snd_mtpav_probe(struct platform_device *dev)
695 {
696 	struct snd_card *card;
697 	int err;
698 	struct mtpav *mtp_card;
699 
700 	err = snd_card_create(index, id, THIS_MODULE, sizeof(*mtp_card), &card);
701 	if (err < 0)
702 		return err;
703 
704 	mtp_card = card->private_data;
705 	spin_lock_init(&mtp_card->spinlock);
706 	init_timer(&mtp_card->timer);
707 	mtp_card->card = card;
708 	mtp_card->irq = -1;
709 	mtp_card->share_irq = 0;
710 	mtp_card->inmidistate = 0;
711 	mtp_card->outmidihwport = 0xffffffff;
712 	init_timer(&mtp_card->timer);
713 	mtp_card->timer.function = snd_mtpav_output_timer;
714 	mtp_card->timer.data = (unsigned long) mtp_card;
715 
716 	card->private_free = snd_mtpav_free;
717 
718 	err = snd_mtpav_get_RAWMIDI(mtp_card);
719 	if (err < 0)
720 		goto __error;
721 
722 	mtp_card->inmidiport = mtp_card->num_ports + MTPAV_PIDX_BROADCAST;
723 
724 	err = snd_mtpav_get_ISA(mtp_card);
725 	if (err < 0)
726 		goto __error;
727 
728 	strcpy(card->driver, "MTPAV");
729 	strcpy(card->shortname, "MTPAV on parallel port");
730 	snprintf(card->longname, sizeof(card->longname),
731 		 "MTPAV on parallel port at 0x%lx", port);
732 
733 	snd_mtpav_portscan(mtp_card);
734 
735 	snd_card_set_dev(card, &dev->dev);
736 	err = snd_card_register(mtp_card->card);
737 	if (err < 0)
738 		goto __error;
739 
740 	platform_set_drvdata(dev, card);
741 	printk(KERN_INFO "Motu MidiTimePiece on parallel port irq: %d ioport: 0x%lx\n", irq, port);
742 	return 0;
743 
744  __error:
745 	snd_card_free(card);
746 	return err;
747 }
748 
749 static int snd_mtpav_remove(struct platform_device *devptr)
750 {
751 	snd_card_free(platform_get_drvdata(devptr));
752 	return 0;
753 }
754 
755 #define SND_MTPAV_DRIVER	"snd_mtpav"
756 
757 static struct platform_driver snd_mtpav_driver = {
758 	.probe		= snd_mtpav_probe,
759 	.remove		= snd_mtpav_remove,
760 	.driver		= {
761 		.name	= SND_MTPAV_DRIVER,
762 		.owner	= THIS_MODULE,
763 	},
764 };
765 
766 static int __init alsa_card_mtpav_init(void)
767 {
768 	int err;
769 
770 	if ((err = platform_driver_register(&snd_mtpav_driver)) < 0)
771 		return err;
772 
773 	device = platform_device_register_simple(SND_MTPAV_DRIVER, -1, NULL, 0);
774 	if (!IS_ERR(device)) {
775 		if (platform_get_drvdata(device))
776 			return 0;
777 		platform_device_unregister(device);
778 		err = -ENODEV;
779 	} else
780 		err = PTR_ERR(device);
781 	platform_driver_unregister(&snd_mtpav_driver);
782 	return err;
783 }
784 
785 static void __exit alsa_card_mtpav_exit(void)
786 {
787 	platform_device_unregister(device);
788 	platform_driver_unregister(&snd_mtpav_driver);
789 }
790 
791 module_init(alsa_card_mtpav_init)
792 module_exit(alsa_card_mtpav_exit)
793