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Linux/sound/drivers/mtpav.c

  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_new(&dev->dev, index, id, THIS_MODULE,
701                            sizeof(*mtp_card), &card);
702         if (err < 0)
703                 return err;
704 
705         mtp_card = card->private_data;
706         spin_lock_init(&mtp_card->spinlock);
707         init_timer(&mtp_card->timer);
708         mtp_card->card = card;
709         mtp_card->irq = -1;
710         mtp_card->share_irq = 0;
711         mtp_card->inmidistate = 0;
712         mtp_card->outmidihwport = 0xffffffff;
713         init_timer(&mtp_card->timer);
714         mtp_card->timer.function = snd_mtpav_output_timer;
715         mtp_card->timer.data = (unsigned long) mtp_card;
716 
717         card->private_free = snd_mtpav_free;
718 
719         err = snd_mtpav_get_RAWMIDI(mtp_card);
720         if (err < 0)
721                 goto __error;
722 
723         mtp_card->inmidiport = mtp_card->num_ports + MTPAV_PIDX_BROADCAST;
724 
725         err = snd_mtpav_get_ISA(mtp_card);
726         if (err < 0)
727                 goto __error;
728 
729         strcpy(card->driver, "MTPAV");
730         strcpy(card->shortname, "MTPAV on parallel port");
731         snprintf(card->longname, sizeof(card->longname),
732                  "MTPAV on parallel port at 0x%lx", port);
733 
734         snd_mtpav_portscan(mtp_card);
735 
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 

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