linux/sound/drivers/mtpav.c
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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        mcard->res_port = devm_request_region(mcard->card->dev, port, 3,
 570                                              "MotuMTPAV MIDI");
 571        if (!mcard->res_port) {
 572                snd_printk(KERN_ERR "MTVAP port 0x%lx is busy\n", port);
 573                return -EBUSY;
 574        }
 575        mcard->port = port;
 576        if (devm_request_irq(mcard->card->dev, irq, snd_mtpav_irqh, 0,
 577                             "MOTU MTPAV", mcard)) {
 578                snd_printk(KERN_ERR "MTVAP IRQ %d busy\n", irq);
 579                return -EBUSY;
 580        }
 581        mcard->irq = irq;
 582        return 0;
 583}
 584
 585
 586/*
 587 */
 588
 589static const struct snd_rawmidi_ops snd_mtpav_output = {
 590        .open =         snd_mtpav_output_open,
 591        .close =        snd_mtpav_output_close,
 592        .trigger =      snd_mtpav_output_trigger,
 593};
 594
 595static const struct snd_rawmidi_ops snd_mtpav_input = {
 596        .open =         snd_mtpav_input_open,
 597        .close =        snd_mtpav_input_close,
 598        .trigger =      snd_mtpav_input_trigger,
 599};
 600
 601
 602/*
 603 * get RAWMIDI resources
 604 */
 605
 606static void snd_mtpav_set_name(struct mtpav *chip,
 607                               struct snd_rawmidi_substream *substream)
 608{
 609        if (substream->number >= 0 && substream->number < chip->num_ports)
 610                sprintf(substream->name, "MTP direct %d", (substream->number % chip->num_ports) + 1);
 611        else if (substream->number >= 8 && substream->number < chip->num_ports * 2)
 612                sprintf(substream->name, "MTP remote %d", (substream->number % chip->num_ports) + 1);
 613        else if (substream->number == chip->num_ports * 2)
 614                strcpy(substream->name, "MTP computer");
 615        else if (substream->number == chip->num_ports * 2 + 1)
 616                strcpy(substream->name, "MTP ADAT");
 617        else
 618                strcpy(substream->name, "MTP broadcast");
 619}
 620
 621static int snd_mtpav_get_RAWMIDI(struct mtpav *mcard)
 622{
 623        int rval;
 624        struct snd_rawmidi *rawmidi;
 625        struct snd_rawmidi_substream *substream;
 626        struct list_head *list;
 627
 628        if (hwports < 1)
 629                hwports = 1;
 630        else if (hwports > 8)
 631                hwports = 8;
 632        mcard->num_ports = hwports;
 633
 634        rval = snd_rawmidi_new(mcard->card, "MotuMIDI", 0,
 635                               mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
 636                               mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
 637                               &mcard->rmidi);
 638        if (rval < 0)
 639                return rval;
 640        rawmidi = mcard->rmidi;
 641        rawmidi->private_data = mcard;
 642
 643        list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
 644                substream = list_entry(list, struct snd_rawmidi_substream, list);
 645                snd_mtpav_set_name(mcard, substream);
 646                substream->ops = &snd_mtpav_input;
 647        }
 648        list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
 649                substream = list_entry(list, struct snd_rawmidi_substream, list);
 650                snd_mtpav_set_name(mcard, substream);
 651                substream->ops = &snd_mtpav_output;
 652                mcard->ports[substream->number].hwport = translate_subdevice_to_hwport(mcard, substream->number);
 653        }
 654        rawmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT |
 655                               SNDRV_RAWMIDI_INFO_DUPLEX;
 656        sprintf(rawmidi->name, "MTP AV MIDI");
 657        return 0;
 658}
 659
 660/*
 661 */
 662
 663static void snd_mtpav_free(struct snd_card *card)
 664{
 665        struct mtpav *crd = card->private_data;
 666        unsigned long flags;
 667
 668        spin_lock_irqsave(&crd->spinlock, flags);
 669        if (crd->istimer > 0)
 670                snd_mtpav_remove_output_timer(crd);
 671        spin_unlock_irqrestore(&crd->spinlock, flags);
 672}
 673
 674/*
 675 */
 676static int snd_mtpav_probe(struct platform_device *dev)
 677{
 678        struct snd_card *card;
 679        int err;
 680        struct mtpav *mtp_card;
 681
 682        err = snd_devm_card_new(&dev->dev, index, id, THIS_MODULE,
 683                                sizeof(*mtp_card), &card);
 684        if (err < 0)
 685                return err;
 686
 687        mtp_card = card->private_data;
 688        spin_lock_init(&mtp_card->spinlock);
 689        mtp_card->card = card;
 690        mtp_card->irq = -1;
 691        mtp_card->share_irq = 0;
 692        mtp_card->inmidistate = 0;
 693        mtp_card->outmidihwport = 0xffffffff;
 694        timer_setup(&mtp_card->timer, snd_mtpav_output_timer, 0);
 695
 696        err = snd_mtpav_get_RAWMIDI(mtp_card);
 697        if (err < 0)
 698                return err;
 699
 700        mtp_card->inmidiport = mtp_card->num_ports + MTPAV_PIDX_BROADCAST;
 701
 702        err = snd_mtpav_get_ISA(mtp_card);
 703        if (err < 0)
 704                return err;
 705
 706        strcpy(card->driver, "MTPAV");
 707        strcpy(card->shortname, "MTPAV on parallel port");
 708        snprintf(card->longname, sizeof(card->longname),
 709                 "MTPAV on parallel port at 0x%lx", port);
 710
 711        snd_mtpav_portscan(mtp_card);
 712
 713        err = snd_card_register(mtp_card->card);
 714        if (err < 0)
 715                return err;
 716
 717        card->private_free = snd_mtpav_free;
 718
 719        platform_set_drvdata(dev, card);
 720        printk(KERN_INFO "Motu MidiTimePiece on parallel port irq: %d ioport: 0x%lx\n", irq, port);
 721        return 0;
 722}
 723
 724#define SND_MTPAV_DRIVER        "snd_mtpav"
 725
 726static struct platform_driver snd_mtpav_driver = {
 727        .probe          = snd_mtpav_probe,
 728        .driver         = {
 729                .name   = SND_MTPAV_DRIVER,
 730        },
 731};
 732
 733static int __init alsa_card_mtpav_init(void)
 734{
 735        int err;
 736
 737        err = platform_driver_register(&snd_mtpav_driver);
 738        if (err < 0)
 739                return err;
 740
 741        device = platform_device_register_simple(SND_MTPAV_DRIVER, -1, NULL, 0);
 742        if (!IS_ERR(device)) {
 743                if (platform_get_drvdata(device))
 744                        return 0;
 745                platform_device_unregister(device);
 746                err = -ENODEV;
 747        } else
 748                err = PTR_ERR(device);
 749        platform_driver_unregister(&snd_mtpav_driver);
 750        return err;
 751}
 752
 753static void __exit alsa_card_mtpav_exit(void)
 754{
 755        platform_device_unregister(device);
 756        platform_driver_unregister(&snd_mtpav_driver);
 757}
 758
 759module_init(alsa_card_mtpav_init)
 760module_exit(alsa_card_mtpav_exit)
 761