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