source: GPL/trunk/alsa-kernel/drivers/mtpav.c@ 695

Last change on this file since 695 was 695, checked in by David Azarewicz, 4 years ago

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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * MOTU Midi Timepiece ALSA Main routines
4 * Copyright by Michael T. Mayers (c) Jan 09, 2000
5 * mail: michael@tweakoz.com
6 * Thanks to John Galbraith
7 *
8 * This driver is for the 'Mark Of The Unicorn' (MOTU)
9 * MidiTimePiece AV multiport MIDI interface
10 *
11 * IOPORTS
12 * -------
13 * 8 MIDI Ins and 8 MIDI outs
14 * Video Sync In (BNC), Word Sync Out (BNC),
15 * ADAT Sync Out (DB9)
16 * SMPTE in/out (1/4")
17 * 2 programmable pedal/footswitch inputs and 4 programmable MIDI controller knobs.
18 * Macintosh RS422 serial port
19 * RS422 "network" port for ganging multiple MTP's
20 * PC Parallel Port ( which this driver currently uses )
21 *
22 * MISC FEATURES
23 * -------------
24 * Hardware MIDI routing, merging, and filtering
25 * MIDI Synchronization to Video, ADAT, SMPTE and other Clock sources
26 * 128 'scene' memories, recallable from MIDI program change
27 *
28 * ChangeLog
29 * Jun 11 2001 Takashi Iwai <tiwai@suse.de>
30 * - Recoded & debugged
31 * - Added timer interrupt for midi outputs
32 * - hwports is between 1 and 8, which specifies the number of hardware ports.
33 * The three global ports, computer, adat and broadcast ports, are created
34 * always after h/w and remote ports.
35 */
36
37#include <linux/init.h>
38#include <linux/interrupt.h>
39#include <linux/module.h>
40#include <linux/err.h>
41#include <linux/platform_device.h>
42#include <linux/ioport.h>
43#include <linux/io.h>
44#include <linux/moduleparam.h>
45#include <sound/core.h>
46#include <sound/initval.h>
47#include <sound/rawmidi.h>
48#include <linux/delay.h>
49
50/*
51 * globals
52 */
53MODULE_AUTHOR("Michael T. Mayers");
54MODULE_DESCRIPTION("MOTU MidiTimePiece AV multiport MIDI");
55MODULE_LICENSE("GPL");
56
57// io resources
58#define MTPAV_IOBASE 0x378
59#define MTPAV_IRQ 7
60#define MTPAV_MAX_PORTS 8
61
62static int index = SNDRV_DEFAULT_IDX1;
63static char *id = SNDRV_DEFAULT_STR1;
64static long port = MTPAV_IOBASE; /* 0x378, 0x278 */
65static int irq = MTPAV_IRQ; /* 7, 5 */
66static int hwports = MTPAV_MAX_PORTS; /* use hardware ports 1-8 */
67
68module_param(index, int, 0444);
69MODULE_PARM_DESC(index, "Index value for MotuMTPAV MIDI.");
70module_param(id, charp, 0444);
71MODULE_PARM_DESC(id, "ID string for MotuMTPAV MIDI.");
72module_param_hw(port, long, ioport, 0444);
73MODULE_PARM_DESC(port, "Parallel port # for MotuMTPAV MIDI.");
74module_param_hw(irq, int, irq, 0444);
75MODULE_PARM_DESC(irq, "Parallel IRQ # for MotuMTPAV MIDI.");
76module_param(hwports, int, 0444);
77MODULE_PARM_DESC(hwports, "Hardware ports # for MotuMTPAV MIDI.");
78
79static struct platform_device *device;
80
81/*
82 * defines
83 */
84//#define USE_FAKE_MTP // don't actually read/write to MTP device (for debugging without an actual unit) (does not work yet)
85
86// parallel port usage masks
87#define SIGS_BYTE 0x08
88#define SIGS_RFD 0x80
89#define SIGS_IRQ 0x40
90#define SIGS_IN0 0x10
91#define SIGS_IN1 0x20
92
93#define SIGC_WRITE 0x04
94#define SIGC_READ 0x08
95#define SIGC_INTEN 0x10
96
97#define DREG 0
98#define SREG 1
99#define CREG 2
100
101//
102#define MTPAV_MODE_INPUT_OPENED 0x01
103#define MTPAV_MODE_OUTPUT_OPENED 0x02
104#define MTPAV_MODE_INPUT_TRIGGERED 0x04
105#define MTPAV_MODE_OUTPUT_TRIGGERED 0x08
106
107#define NUMPORTS (0x12+1)
108
109
110/*
111 */
112
113struct mtpav_port {
114 u8 number;
115 u8 hwport;
116 u8 mode;
117 u8 running_status;
118 struct snd_rawmidi_substream *input;
119 struct snd_rawmidi_substream *output;
120};
121
122struct mtpav {
123 struct snd_card *card;
124 unsigned long port;
125 struct resource *res_port;
126 int irq; /* interrupt (for inputs) */
127 spinlock_t spinlock;
128 int share_irq; /* number of accesses to input interrupts */
129 int istimer; /* number of accesses to timer interrupts */
130 struct timer_list timer; /* timer interrupts for outputs */
131 struct snd_rawmidi *rmidi;
132 int num_ports; /* number of hw ports (1-8) */
133 struct mtpav_port ports[NUMPORTS]; /* all ports including computer, adat and bc */
134
135 u32 inmidiport; /* selected input midi port */
136 u32 inmidistate; /* during midi command 0xf5 */
137
138 u32 outmidihwport; /* selected output midi hw port */
139};
140
141
142/*
143 * possible hardware ports (selected by 0xf5 port message)
144 * 0x00 all ports
145 * 0x01 .. 0x08 this MTP's ports 1..8
146 * 0x09 .. 0x10 networked MTP's ports (9..16)
147 * 0x11 networked MTP's computer port
148 * 0x63 to ADAT
149 *
150 * mappig:
151 * subdevice 0 - (X-1) ports
152 * X - (2*X-1) networked ports
153 * X computer
154 * X+1 ADAT
155 * X+2 all ports
156 *
157 * where X = chip->num_ports
158 */
159
160#define MTPAV_PIDX_COMPUTER 0
161#define MTPAV_PIDX_ADAT 1
162#define MTPAV_PIDX_BROADCAST 2
163
164
165static int translate_subdevice_to_hwport(struct mtpav *chip, int subdev)
166{
167 if (subdev < 0)
168 return 0x01; /* invalid - use port 0 as default */
169 else if (subdev < chip->num_ports)
170 return subdev + 1; /* single mtp port */
171 else if (subdev < chip->num_ports * 2)
172 return subdev - chip->num_ports + 0x09; /* remote port */
173 else if (subdev == chip->num_ports * 2 + MTPAV_PIDX_COMPUTER)
174 return 0x11; /* computer port */
175 else if (subdev == chip->num_ports + MTPAV_PIDX_ADAT)
176 return 0x63; /* ADAT */
177 return 0; /* all ports */
178}
179
180static int translate_hwport_to_subdevice(struct mtpav *chip, int hwport)
181{
182 int p;
183 if (hwport <= 0x00) /* all ports */
184 return chip->num_ports + MTPAV_PIDX_BROADCAST;
185 else if (hwport <= 0x08) { /* single port */
186 p = hwport - 1;
187 if (p >= chip->num_ports)
188 p = 0;
189 return p;
190 } else if (hwport <= 0x10) { /* remote port */
191 p = hwport - 0x09 + chip->num_ports;
192 if (p >= chip->num_ports * 2)
193 p = chip->num_ports;
194 return p;
195 } else if (hwport == 0x11) /* computer port */
196 return chip->num_ports + MTPAV_PIDX_COMPUTER;
197 else /* ADAT */
198 return chip->num_ports + MTPAV_PIDX_ADAT;
199}
200
201
202/*
203 */
204
205static u8 snd_mtpav_getreg(struct mtpav *chip, u16 reg)
206{
207 u8 rval = 0;
208
209 if (reg == SREG) {
210 rval = inb(chip->port + SREG);
211 rval = (rval & 0xf8);
212 } else if (reg == CREG) {
213 rval = inb(chip->port + CREG);
214 rval = (rval & 0x1c);
215 }
216
217 return rval;
218}
219
220/*
221 */
222
223static inline void snd_mtpav_mputreg(struct mtpav *chip, u16 reg, u8 val)
224{
225 if (reg == DREG || reg == CREG)
226 outb(val, chip->port + reg);
227}
228
229/*
230 */
231
232static void snd_mtpav_wait_rfdhi(struct mtpav *chip)
233{
234 int counts = 10000;
235 u8 sbyte;
236
237 sbyte = snd_mtpav_getreg(chip, SREG);
238 while (!(sbyte & SIGS_RFD) && counts--) {
239 sbyte = snd_mtpav_getreg(chip, SREG);
240 udelay(10);
241 }
242}
243
244static void snd_mtpav_send_byte(struct mtpav *chip, u8 byte)
245{
246 u8 tcbyt;
247 u8 clrwrite;
248 u8 setwrite;
249
250 snd_mtpav_wait_rfdhi(chip);
251
252 /////////////////
253
254 tcbyt = snd_mtpav_getreg(chip, CREG);
255 clrwrite = tcbyt & (SIGC_WRITE ^ 0xff);
256 setwrite = tcbyt | SIGC_WRITE;
257
258 snd_mtpav_mputreg(chip, DREG, byte);
259 snd_mtpav_mputreg(chip, CREG, clrwrite); // clear write bit
260
261 snd_mtpav_mputreg(chip, CREG, setwrite); // set write bit
262
263}
264
265
266/*
267 */
268
269/* call this with spin lock held */
270static void snd_mtpav_output_port_write(struct mtpav *mtp_card,
271 struct mtpav_port *portp,
272 struct snd_rawmidi_substream *substream)
273{
274 u8 outbyte;
275
276 // Get the outbyte first, so we can emulate running status if
277 // necessary
278 if (snd_rawmidi_transmit(substream, &outbyte, 1) != 1)
279 return;
280
281 // send port change command if necessary
282
283 if (portp->hwport != mtp_card->outmidihwport) {
284 mtp_card->outmidihwport = portp->hwport;
285
286 snd_mtpav_send_byte(mtp_card, 0xf5);
287 snd_mtpav_send_byte(mtp_card, portp->hwport);
288 /*
289 snd_printk(KERN_DEBUG "new outport: 0x%x\n",
290 (unsigned int) portp->hwport);
291 */
292 if (!(outbyte & 0x80) && portp->running_status)
293 snd_mtpav_send_byte(mtp_card, portp->running_status);
294 }
295
296 // send data
297
298 do {
299 if (outbyte & 0x80)
300 portp->running_status = outbyte;
301
302 snd_mtpav_send_byte(mtp_card, outbyte);
303 } while (snd_rawmidi_transmit(substream, &outbyte, 1) == 1);
304}
305
306static void snd_mtpav_output_write(struct snd_rawmidi_substream *substream)
307{
308 struct mtpav *mtp_card = substream->rmidi->private_data;
309 struct mtpav_port *portp = &mtp_card->ports[substream->number];
310 unsigned long flags;
311
312 spin_lock_irqsave(&mtp_card->spinlock, flags);
313 snd_mtpav_output_port_write(mtp_card, portp, substream);
314 spin_unlock_irqrestore(&mtp_card->spinlock, flags);
315}
316
317
318/*
319 * mtpav control
320 */
321
322static void snd_mtpav_portscan(struct mtpav *chip) // put mtp into smart routing mode
323{
324 u8 p;
325
326 for (p = 0; p < 8; p++) {
327 snd_mtpav_send_byte(chip, 0xf5);
328 snd_mtpav_send_byte(chip, p);
329 snd_mtpav_send_byte(chip, 0xfe);
330 }
331}
332
333/*
334 */
335
336static int snd_mtpav_input_open(struct snd_rawmidi_substream *substream)
337{
338 struct mtpav *mtp_card = substream->rmidi->private_data;
339 struct mtpav_port *portp = &mtp_card->ports[substream->number];
340 unsigned long flags;
341
342 spin_lock_irqsave(&mtp_card->spinlock, flags);
343 portp->mode |= MTPAV_MODE_INPUT_OPENED;
344 portp->input = substream;
345 if (mtp_card->share_irq++ == 0)
346 snd_mtpav_mputreg(mtp_card, CREG, (SIGC_INTEN | SIGC_WRITE)); // enable pport interrupts
347 spin_unlock_irqrestore(&mtp_card->spinlock, flags);
348 return 0;
349}
350
351/*
352 */
353
354static int snd_mtpav_input_close(struct snd_rawmidi_substream *substream)
355{
356 struct mtpav *mtp_card = substream->rmidi->private_data;
357 struct mtpav_port *portp = &mtp_card->ports[substream->number];
358 unsigned long flags;
359
360 spin_lock_irqsave(&mtp_card->spinlock, flags);
361 portp->mode &= ~MTPAV_MODE_INPUT_OPENED;
362 portp->input = NULL;
363 if (--mtp_card->share_irq == 0)
364 snd_mtpav_mputreg(mtp_card, CREG, 0); // disable pport interrupts
365 spin_unlock_irqrestore(&mtp_card->spinlock, flags);
366 return 0;
367}
368
369/*
370 */
371
372static void snd_mtpav_input_trigger(struct snd_rawmidi_substream *substream, int up)
373{
374 struct mtpav *mtp_card = substream->rmidi->private_data;
375 struct mtpav_port *portp = &mtp_card->ports[substream->number];
376 unsigned long flags;
377
378 spin_lock_irqsave(&mtp_card->spinlock, flags);
379 if (up)
380 portp->mode |= MTPAV_MODE_INPUT_TRIGGERED;
381 else
382 portp->mode &= ~MTPAV_MODE_INPUT_TRIGGERED;
383 spin_unlock_irqrestore(&mtp_card->spinlock, flags);
384
385}
386
387
388/*
389 * timer interrupt for outputs
390 */
391
392static void snd_mtpav_output_timer(struct timer_list *t)
393{
394 unsigned long flags;
395 struct mtpav *chip = from_timer(chip, t, timer);
396 int p;
397
398 spin_lock_irqsave(&chip->spinlock, flags);
399 /* reprogram timer */
400 mod_timer(&chip->timer, 1 + jiffies);
401 /* process each port */
402 for (p = 0; p <= chip->num_ports * 2 + MTPAV_PIDX_BROADCAST; p++) {
403 struct mtpav_port *portp = &chip->ports[p];
404 if ((portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED) && portp->output)
405 snd_mtpav_output_port_write(chip, portp, portp->output);
406 }
407 spin_unlock_irqrestore(&chip->spinlock, flags);
408}
409
410/* spinlock held! */
411static void snd_mtpav_add_output_timer(struct mtpav *chip)
412{
413 mod_timer(&chip->timer, 1 + jiffies);
414}
415
416/* spinlock held! */
417static void snd_mtpav_remove_output_timer(struct mtpav *chip)
418{
419 del_timer(&chip->timer);
420}
421
422/*
423 */
424
425static int snd_mtpav_output_open(struct snd_rawmidi_substream *substream)
426{
427 struct mtpav *mtp_card = substream->rmidi->private_data;
428 struct mtpav_port *portp = &mtp_card->ports[substream->number];
429 unsigned long flags;
430
431 spin_lock_irqsave(&mtp_card->spinlock, flags);
432 portp->mode |= MTPAV_MODE_OUTPUT_OPENED;
433 portp->output = substream;
434 spin_unlock_irqrestore(&mtp_card->spinlock, flags);
435 return 0;
436};
437
438/*
439 */
440
441static int snd_mtpav_output_close(struct snd_rawmidi_substream *substream)
442{
443 struct mtpav *mtp_card = substream->rmidi->private_data;
444 struct mtpav_port *portp = &mtp_card->ports[substream->number];
445 unsigned long flags;
446
447 spin_lock_irqsave(&mtp_card->spinlock, flags);
448 portp->mode &= ~MTPAV_MODE_OUTPUT_OPENED;
449 portp->output = NULL;
450 spin_unlock_irqrestore(&mtp_card->spinlock, flags);
451 return 0;
452};
453
454/*
455 */
456
457static void snd_mtpav_output_trigger(struct snd_rawmidi_substream *substream, int up)
458{
459 struct mtpav *mtp_card = substream->rmidi->private_data;
460 struct mtpav_port *portp = &mtp_card->ports[substream->number];
461 unsigned long flags;
462
463 spin_lock_irqsave(&mtp_card->spinlock, flags);
464 if (up) {
465 if (! (portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED)) {
466 if (mtp_card->istimer++ == 0)
467 snd_mtpav_add_output_timer(mtp_card);
468 portp->mode |= MTPAV_MODE_OUTPUT_TRIGGERED;
469 }
470 } else {
471 portp->mode &= ~MTPAV_MODE_OUTPUT_TRIGGERED;
472 if (--mtp_card->istimer == 0)
473 snd_mtpav_remove_output_timer(mtp_card);
474 }
475 spin_unlock_irqrestore(&mtp_card->spinlock, flags);
476
477 if (up)
478 snd_mtpav_output_write(substream);
479}
480
481/*
482 * midi interrupt for inputs
483 */
484
485static void snd_mtpav_inmidi_process(struct mtpav *mcrd, u8 inbyte)
486{
487 struct mtpav_port *portp;
488
489 if ((int)mcrd->inmidiport > mcrd->num_ports * 2 + MTPAV_PIDX_BROADCAST)
490 return;
491
492 portp = &mcrd->ports[mcrd->inmidiport];
493 if (portp->mode & MTPAV_MODE_INPUT_TRIGGERED)
494 snd_rawmidi_receive(portp->input, &inbyte, 1);
495}
496
497static void snd_mtpav_inmidi_h(struct mtpav *mcrd, u8 inbyte)
498{
499 if (inbyte >= 0xf8) {
500 /* real-time midi code */
501 snd_mtpav_inmidi_process(mcrd, inbyte);
502 return;
503 }
504
505 if (mcrd->inmidistate == 0) { // awaiting command
506 if (inbyte == 0xf5) // MTP port #
507 mcrd->inmidistate = 1;
508 else
509 snd_mtpav_inmidi_process(mcrd, inbyte);
510 } else if (mcrd->inmidistate) {
511 mcrd->inmidiport = translate_hwport_to_subdevice(mcrd, inbyte);
512 mcrd->inmidistate = 0;
513 }
514}
515
516static void snd_mtpav_read_bytes(struct mtpav *mcrd)
517{
518 u8 clrread, setread;
519 u8 mtp_read_byte;
520 u8 sr, cbyt;
521 int i;
522
523 u8 sbyt = snd_mtpav_getreg(mcrd, SREG);
524
525 /* printk(KERN_DEBUG "snd_mtpav_read_bytes() sbyt: 0x%x\n", sbyt); */
526
527 if (!(sbyt & SIGS_BYTE))
528 return;
529
530 cbyt = snd_mtpav_getreg(mcrd, CREG);
531 clrread = cbyt & (SIGC_READ ^ 0xff);
532 setread = cbyt | SIGC_READ;
533
534 do {
535
536 mtp_read_byte = 0;
537 for (i = 0; i < 4; i++) {
538 snd_mtpav_mputreg(mcrd, CREG, setread);
539 sr = snd_mtpav_getreg(mcrd, SREG);
540 snd_mtpav_mputreg(mcrd, CREG, clrread);
541
542 sr &= SIGS_IN0 | SIGS_IN1;
543 sr >>= 4;
544 mtp_read_byte |= sr << (i * 2);
545 }
546
547 snd_mtpav_inmidi_h(mcrd, mtp_read_byte);
548
549 sbyt = snd_mtpav_getreg(mcrd, SREG);
550
551 } while (sbyt & SIGS_BYTE);
552}
553
554static irqreturn_t snd_mtpav_irqh(int irq, void *dev_id)
555{
556 struct mtpav *mcard = dev_id;
557
558 spin_lock(&mcard->spinlock);
559 snd_mtpav_read_bytes(mcard);
560 spin_unlock(&mcard->spinlock);
561 return IRQ_HANDLED;
562}
563
564/*
565 * get ISA resources
566 */
567static int snd_mtpav_get_ISA(struct mtpav *mcard)
568{
569 if ((mcard->res_port = request_region(port, 3, "MotuMTPAV MIDI")) == NULL) {
570 snd_printk(KERN_ERR "MTVAP port 0x%lx is busy\n", port);
571 return -EBUSY;
572 }
573 mcard->port = port;
574 if (request_irq(irq, snd_mtpav_irqh, 0, "MOTU MTPAV", mcard)) {
575 snd_printk(KERN_ERR "MTVAP IRQ %d busy\n", irq);
576 return -EBUSY;
577 }
578 mcard->irq = irq;
579 return 0;
580}
581
582
583/*
584 */
585
586static const struct snd_rawmidi_ops snd_mtpav_output = {
587 .open = snd_mtpav_output_open,
588 .close = snd_mtpav_output_close,
589 .trigger = snd_mtpav_output_trigger,
590};
591
592static const struct snd_rawmidi_ops snd_mtpav_input = {
593 .open = snd_mtpav_input_open,
594 .close = snd_mtpav_input_close,
595 .trigger = snd_mtpav_input_trigger,
596};
597
598
599/*
600 * get RAWMIDI resources
601 */
602
603static void snd_mtpav_set_name(struct mtpav *chip,
604 struct snd_rawmidi_substream *substream)
605{
606 if (substream->number >= 0 && substream->number < chip->num_ports)
607 sprintf(substream->name, "MTP direct %d", (substream->number % chip->num_ports) + 1);
608 else if (substream->number >= 8 && substream->number < chip->num_ports * 2)
609 sprintf(substream->name, "MTP remote %d", (substream->number % chip->num_ports) + 1);
610 else if (substream->number == chip->num_ports * 2)
611 strcpy(substream->name, "MTP computer");
612 else if (substream->number == chip->num_ports * 2 + 1)
613 strcpy(substream->name, "MTP ADAT");
614 else
615 strcpy(substream->name, "MTP broadcast");
616}
617
618static int snd_mtpav_get_RAWMIDI(struct mtpav *mcard)
619{
620 int rval;
621 struct snd_rawmidi *rawmidi;
622 struct snd_rawmidi_substream *substream;
623 struct list_head *list;
624
625 if (hwports < 1)
626 hwports = 1;
627 else if (hwports > 8)
628 hwports = 8;
629 mcard->num_ports = hwports;
630
631 if ((rval = snd_rawmidi_new(mcard->card, "MotuMIDI", 0,
632 mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
633 mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
634 &mcard->rmidi)) < 0)
635 return rval;
636 rawmidi = mcard->rmidi;
637 rawmidi->private_data = mcard;
638
639 list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
640 substream = list_entry(list, struct snd_rawmidi_substream, list);
641 snd_mtpav_set_name(mcard, substream);
642 substream->ops = &snd_mtpav_input;
643 }
644 list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
645 substream = list_entry(list, struct snd_rawmidi_substream, list);
646 snd_mtpav_set_name(mcard, substream);
647 substream->ops = &snd_mtpav_output;
648 mcard->ports[substream->number].hwport = translate_subdevice_to_hwport(mcard, substream->number);
649 }
650 rawmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT |
651 SNDRV_RAWMIDI_INFO_DUPLEX;
652 sprintf(rawmidi->name, "MTP AV MIDI");
653 return 0;
654}
655
656/*
657 */
658
659static void snd_mtpav_free(struct snd_card *card)
660{
661 struct mtpav *crd = card->private_data;
662 unsigned long flags;
663
664 spin_lock_irqsave(&crd->spinlock, flags);
665 if (crd->istimer > 0)
666 snd_mtpav_remove_output_timer(crd);
667 spin_unlock_irqrestore(&crd->spinlock, flags);
668 if (crd->irq >= 0)
669 free_irq(crd->irq, (void *)crd);
670 release_and_free_resource(crd->res_port);
671}
672
673/*
674 */
675static int snd_mtpav_probe(struct platform_device *dev)
676{
677 struct snd_card *card;
678 int err;
679 struct mtpav *mtp_card;
680
681 err = snd_card_new(&dev->dev, index, id, THIS_MODULE,
682 sizeof(*mtp_card), &card);
683 if (err < 0)
684 return err;
685
686 mtp_card = card->private_data;
687 spin_lock_init(&mtp_card->spinlock);
688 mtp_card->card = card;
689 mtp_card->irq = -1;
690 mtp_card->share_irq = 0;
691 mtp_card->inmidistate = 0;
692 mtp_card->outmidihwport = 0xffffffff;
693 timer_setup(&mtp_card->timer, snd_mtpav_output_timer, 0);
694
695 card->private_free = snd_mtpav_free;
696
697 err = snd_mtpav_get_RAWMIDI(mtp_card);
698 if (err < 0)
699 goto __error;
700
701 mtp_card->inmidiport = mtp_card->num_ports + MTPAV_PIDX_BROADCAST;
702
703 err = snd_mtpav_get_ISA(mtp_card);
704 if (err < 0)
705 goto __error;
706
707 strcpy(card->driver, "MTPAV");
708 strcpy(card->shortname, "MTPAV on parallel port");
709 snprintf(card->longname, sizeof(card->longname),
710 "MTPAV on parallel port at 0x%lx", port);
711
712 snd_mtpav_portscan(mtp_card);
713
714 err = snd_card_register(mtp_card->card);
715 if (err < 0)
716 goto __error;
717
718 platform_set_drvdata(dev, card);
719 printk(KERN_INFO "Motu MidiTimePiece on parallel port irq: %d ioport: 0x%lx\n", irq, port);
720 return 0;
721
722 __error:
723 snd_card_free(card);
724 return err;
725}
726
727static int snd_mtpav_remove(struct platform_device *devptr)
728{
729 snd_card_free(platform_get_drvdata(devptr));
730 return 0;
731}
732
733#define SND_MTPAV_DRIVER "snd_mtpav"
734
735static struct platform_driver snd_mtpav_driver = {
736 .probe = snd_mtpav_probe,
737 .remove = snd_mtpav_remove,
738 .driver = {
739 .name = SND_MTPAV_DRIVER,
740 },
741};
742
743static int __init alsa_card_mtpav_init(void)
744{
745 int err;
746
747 if ((err = platform_driver_register(&snd_mtpav_driver)) < 0)
748 return err;
749
750 device = platform_device_register_simple(SND_MTPAV_DRIVER, -1, NULL, 0);
751 if (!IS_ERR(device)) {
752 if (platform_get_drvdata(device))
753 return 0;
754 platform_device_unregister(device);
755 err = -ENODEV;
756 } else
757 err = PTR_ERR(device);
758 platform_driver_unregister(&snd_mtpav_driver);
759 return err;
760}
761
762static void __exit alsa_card_mtpav_exit(void)
763{
764 platform_device_unregister(device);
765 platform_driver_unregister(&snd_mtpav_driver);
766}
767
768module_init(alsa_card_mtpav_init)
769module_exit(alsa_card_mtpav_exit)
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