linux/sound/drivers/mtpav.c
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   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 */
  70MODULE_AUTHOR("Michael T. Mayers");
  71MODULE_DESCRIPTION("MOTU MidiTimePiece AV multiport MIDI");
  72MODULE_LICENSE("GPL");
  73MODULE_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
  80static int index = SNDRV_DEFAULT_IDX1;
  81static char *id = SNDRV_DEFAULT_STR1;
  82static long port = MTPAV_IOBASE;        /* 0x378, 0x278 */
  83static int irq = MTPAV_IRQ;             /* 7, 5 */
  84static int hwports = MTPAV_MAX_PORTS;   /* use hardware ports 1-8 */
  85
  86module_param(index, int, 0444);
  87MODULE_PARM_DESC(index, "Index value for MotuMTPAV MIDI.");
  88module_param(id, charp, 0444);
  89MODULE_PARM_DESC(id, "ID string for MotuMTPAV MIDI.");
  90module_param(port, long, 0444);
  91MODULE_PARM_DESC(port, "Parallel port # for MotuMTPAV MIDI.");
  92module_param(irq, int, 0444);
  93MODULE_PARM_DESC(irq, "Parallel IRQ # for MotuMTPAV MIDI.");
  94module_param(hwports, int, 0444);
  95MODULE_PARM_DESC(hwports, "Hardware ports # for MotuMTPAV MIDI.");
  96
  97static 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
 131struct 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
 140struct 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
 183static 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
 198static 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
 223static 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
 241static 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
 250static 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
 262static 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 */
 288static 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
 324static 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
 340static 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
 354static 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
 372static 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
 390static 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
 410static 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! */
 430static 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! */
 437static void snd_mtpav_remove_output_timer(struct mtpav *chip)
 438{
 439        del_timer(&chip->timer);
 440}
 441
 442/*
 443 */
 444
 445static 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
 461static 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
 477static 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
 505static 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
 517static 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
 536static 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
 574static 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 */
 587static 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
 606static 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
 612static 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
 623static 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
 638static 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
 679static 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 */
 695static 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
 750static 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
 759static 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
 767static 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
 786static void __exit alsa_card_mtpav_exit(void)
 787{
 788        platform_device_unregister(device);
 789        platform_driver_unregister(&snd_mtpav_driver);
 790}
 791
 792module_init(alsa_card_mtpav_init)
 793module_exit(alsa_card_mtpav_exit)
 794