drivers/hid/hid-prodikeys.c

   1 /*
   2  *  HID driver for the Prodikeys PC-MIDI Keyboard
   3  *  providing midi & extra multimedia keys functionality
   4  *
   5  *  Copyright (c) 2009 Don Prince <dhprince.devel@yahoo.co.uk>
   6  *
   7  *  Controls for Octave Shift Up/Down, Channel, and
   8  *  Sustain Duration available via sysfs.
   9  *
  10  */
  11
  12 /*
  13  * This program is free software; you can redistribute it and/or modify it
  14  * under the terms of the GNU General Public License as published by the Free
  15  * Software Foundation; either version 2 of the License, or (at your option)
  16  * any later version.
  17  */
  18
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include <linux/device.h>
  22 #include <linux/module.h>
  23 #include <linux/usb.h>
  24 #include <linux/mutex.h>
  25 #include <linux/hid.h>
  26 #include <sound/core.h>
  27 #include <sound/initval.h>
  28 #include <sound/rawmidi.h>
  29 #include "hid-ids.h"
  30
  31
  32 #define pk_debug(format, arg...) \
  33         pr_debug("hid-prodikeys: " format "\n" , ## arg)
  34 #define pk_error(format, arg...) \
  35         pr_err("hid-prodikeys: " format "\n" , ## arg)
  36
  37 struct pcmidi_snd;
  38
  39 struct pk_device {
  40         unsigned long           quirks;
  41
  42         struct hid_device       *hdev;
  43         struct pcmidi_snd       *pm; /* pcmidi device context */
  44 };
  45
  46 struct pcmidi_sustain {
  47         unsigned long           in_use;
  48         struct pcmidi_snd       *pm;
  49         struct timer_list       timer;
  50         unsigned char           status;
  51         unsigned char           note;
  52         unsigned char           velocity;
  53 };
  54
  55 #define PCMIDI_SUSTAINED_MAX    32
  56 struct pcmidi_snd {
  57         struct pk_device                *pk;
  58         unsigned short                  ifnum;
  59         struct hid_report               *pcmidi_report6;
  60         struct input_dev                *input_ep82;
  61         unsigned short                  midi_mode;
  62         unsigned short                  midi_sustain_mode;
  63         unsigned short                  midi_sustain;
  64         unsigned short                  midi_channel;
  65         short                           midi_octave;
  66         struct pcmidi_sustain           sustained_notes[PCMIDI_SUSTAINED_MAX];
  67         unsigned short                  fn_state;
  68         unsigned short                  last_key[24];
  69         spinlock_t                      rawmidi_in_lock;
  70         struct snd_card                 *card;
  71         struct snd_rawmidi              *rwmidi;
  72         struct snd_rawmidi_substream    *in_substream;
  73         struct snd_rawmidi_substream    *out_substream;
  74         unsigned long                   in_triggered;
  75         unsigned long                   out_active;
  76 };
  77
  78 #define PK_QUIRK_NOGET  0x00010000
  79 #define PCMIDI_MIDDLE_C 60
  80 #define PCMIDI_CHANNEL_MIN 0
  81 #define PCMIDI_CHANNEL_MAX 15
  82 #define PCMIDI_OCTAVE_MIN (-2)
  83 #define PCMIDI_OCTAVE_MAX 2
  84 #define PCMIDI_SUSTAIN_MIN 0
  85 #define PCMIDI_SUSTAIN_MAX 5000
  86
  87 static const char shortname[] = "PC-MIDI";
  88 static const char longname[] = "Prodikeys PC-MIDI Keyboard";
  89
  90 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  91 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  92 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  93
  94 module_param_array(index, int, NULL, 0444);
  95 module_param_array(id, charp, NULL, 0444);
  96 module_param_array(enable, bool, NULL, 0444);
  97 MODULE_PARM_DESC(index, "Index value for the PC-MIDI virtual audio driver");
  98 MODULE_PARM_DESC(id, "ID string for the PC-MIDI virtual audio driver");
  99 MODULE_PARM_DESC(enable, "Enable for the PC-MIDI virtual audio driver");
 100
 101
 102 /* Output routine for the sysfs channel file */
 103 static ssize_t show_channel(struct device *dev,
 104         struct device_attribute *attr, char *buf)
 105 {
 106         struct hid_device *hdev = to_hid_device(dev);
 107         struct pk_device *pk = hid_get_drvdata(hdev);
 108
 109         dbg_hid("pcmidi sysfs read channel=%u\n", pk->pm->midi_channel);
 110
 111         return sprintf(buf, "%u (min:%u, max:%u)\n", pk->pm->midi_channel,
 112                 PCMIDI_CHANNEL_MIN, PCMIDI_CHANNEL_MAX);
 113 }
 114
 115 /* Input routine for the sysfs channel file */
 116 static ssize_t store_channel(struct device *dev,
 117         struct device_attribute *attr, const char *buf, size_t count)
 118 {
 119         struct hid_device *hdev = to_hid_device(dev);
 120         struct pk_device *pk = hid_get_drvdata(hdev);
 121
 122         unsigned channel = 0;
 123
 124         if (sscanf(buf, "%u", &channel) > 0 && channel <= PCMIDI_CHANNEL_MAX) {
 125                 dbg_hid("pcmidi sysfs write channel=%u\n", channel);
 126                 pk->pm->midi_channel = channel;
 127                 return strlen(buf);
 128         }
 129         return -EINVAL;
 130 }
 131
 132 static DEVICE_ATTR(channel, S_IRUGO | S_IWUSR | S_IWGRP , show_channel,
 133                 store_channel);
 134
 135 static struct device_attribute *sysfs_device_attr_channel = {
 136                 &dev_attr_channel,
 137                 };
 138
 139 /* Output routine for the sysfs sustain file */
 140 static ssize_t show_sustain(struct device *dev,
 141  struct device_attribute *attr, char *buf)
 142 {
 143         struct hid_device *hdev = to_hid_device(dev);
 144         struct pk_device *pk = hid_get_drvdata(hdev);
 145
 146         dbg_hid("pcmidi sysfs read sustain=%u\n", pk->pm->midi_sustain);
 147
 148         return sprintf(buf, "%u (off:%u, max:%u (ms))\n", pk->pm->midi_sustain,
 149                 PCMIDI_SUSTAIN_MIN, PCMIDI_SUSTAIN_MAX);
 150 }
 151
 152 /* Input routine for the sysfs sustain file */
 153 static ssize_t store_sustain(struct device *dev,
 154         struct device_attribute *attr, const char *buf, size_t count)
 155 {
 156         struct hid_device *hdev = to_hid_device(dev);
 157         struct pk_device *pk = hid_get_drvdata(hdev);
 158
 159         unsigned sustain = 0;
 160
 161         if (sscanf(buf, "%u", &sustain) > 0 && sustain <= PCMIDI_SUSTAIN_MAX) {
 162                 dbg_hid("pcmidi sysfs write sustain=%u\n", sustain);
 163                 pk->pm->midi_sustain = sustain;
 164                 pk->pm->midi_sustain_mode =
 165                         (0 == sustain || !pk->pm->midi_mode) ? 0 : 1;
 166                 return strlen(buf);
 167         }
 168         return -EINVAL;
 169 }
 170
 171 static DEVICE_ATTR(sustain, S_IRUGO | S_IWUSR | S_IWGRP, show_sustain,
 172                 store_sustain);
 173
 174 static struct device_attribute *sysfs_device_attr_sustain = {
 175                 &dev_attr_sustain,
 176                 };
 177
 178 /* Output routine for the sysfs octave file */
 179 static ssize_t show_octave(struct device *dev,
 180         struct device_attribute *attr, char *buf)
 181 {
 182         struct hid_device *hdev = to_hid_device(dev);
 183         struct pk_device *pk = hid_get_drvdata(hdev);
 184
 185         dbg_hid("pcmidi sysfs read octave=%d\n", pk->pm->midi_octave);
 186
 187         return sprintf(buf, "%d (min:%d, max:%d)\n", pk->pm->midi_octave,
 188                 PCMIDI_OCTAVE_MIN, PCMIDI_OCTAVE_MAX);
 189 }
 190
 191 /* Input routine for the sysfs octave file */
 192 static ssize_t store_octave(struct device *dev,
 193         struct device_attribute *attr, const char *buf, size_t count)
 194 {
 195         struct hid_device *hdev = to_hid_device(dev);
 196         struct pk_device *pk = hid_get_drvdata(hdev);
 197
 198         int octave = 0;
 199
 200         if (sscanf(buf, "%d", &octave) > 0 &&
 201                 octave >= PCMIDI_OCTAVE_MIN && octave <= PCMIDI_OCTAVE_MAX) {
 202                 dbg_hid("pcmidi sysfs write octave=%d\n", octave);
 203                 pk->pm->midi_octave = octave;
 204                 return strlen(buf);
 205         }
 206         return -EINVAL;
 207 }
 208
 209 static DEVICE_ATTR(octave, S_IRUGO | S_IWUSR | S_IWGRP, show_octave,
 210                 store_octave);
 211
 212 static struct device_attribute *sysfs_device_attr_octave = {
 213                 &dev_attr_octave,
 214                 };
 215
 216
 217 static void pcmidi_send_note(struct pcmidi_snd *pm,
 218         unsigned char status, unsigned char note, unsigned char velocity)
 219 {
 220         unsigned long flags;
 221         unsigned char buffer[3];
 222
 223         buffer[0] = status;
 224         buffer[1] = note;
 225         buffer[2] = velocity;
 226
 227         spin_lock_irqsave(&pm->rawmidi_in_lock, flags);
 228
 229         if (!pm->in_substream)
 230                 goto drop_note;
 231         if (!test_bit(pm->in_substream->number, &pm->in_triggered))
 232                 goto drop_note;
 233
 234         snd_rawmidi_receive(pm->in_substream, buffer, 3);
 235
 236 drop_note:
 237         spin_unlock_irqrestore(&pm->rawmidi_in_lock, flags);
 238
 239         return;
 240 }
 241
 242 static void pcmidi_sustained_note_release(unsigned long data)
 243 {
 244         struct pcmidi_sustain *pms = (struct pcmidi_sustain *)data;
 245
 246         pcmidi_send_note(pms->pm, pms->status, pms->note, pms->velocity);
 247         pms->in_use = 0;
 248 }
 249
 250 static void init_sustain_timers(struct pcmidi_snd *pm)
 251 {
 252         struct pcmidi_sustain *pms;
 253         unsigned i;
 254
 255         for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
 256                 pms = &pm->sustained_notes[i];
 257                 pms->in_use = 0;
 258                 pms->pm = pm;
 259                 setup_timer(&pms->timer, pcmidi_sustained_note_release,
 260                         (unsigned long)pms);
 261         }
 262 }
 263
 264 static void stop_sustain_timers(struct pcmidi_snd *pm)
 265 {
 266         struct pcmidi_sustain *pms;
 267         unsigned i;
 268
 269         for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
 270                 pms = &pm->sustained_notes[i];
 271                 pms->in_use = 1;
 272                 del_timer_sync(&pms->timer);
 273         }
 274 }
 275
 276 static int pcmidi_get_output_report(struct pcmidi_snd *pm)
 277 {
 278         struct hid_device *hdev = pm->pk->hdev;
 279         struct hid_report *report;
 280
 281         list_for_each_entry(report,
 282                 &hdev->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 283                 if (!(6 == report->id))
 284                         continue;
 285
 286                 if (report->maxfield < 1) {
 287                         hid_err(hdev, "output report is empty\n");
 288                         break;
 289                 }
 290                 if (report->field[0]->report_count != 2) {
 291                         hid_err(hdev, "field count too low\n");
 292                         break;
 293                 }
 294                 pm->pcmidi_report6 = report;
 295                 return 0;
 296         }
 297         /* should never get here */
 298         return -ENODEV;
 299 }
 300
 301 static void pcmidi_submit_output_report(struct pcmidi_snd *pm, int state)
 302 {
 303         struct hid_device *hdev = pm->pk->hdev;
 304         struct hid_report *report = pm->pcmidi_report6;
 305         report->field[0]->value[0] = 0x01;
 306         report->field[0]->value[1] = state;
 307
 308         hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
 309 }
 310
 311 static int pcmidi_handle_report1(struct pcmidi_snd *pm, u8 *data)
 312 {
 313         u32 bit_mask;
 314
 315         bit_mask = data[1];
 316         bit_mask = (bit_mask << 8) | data[2];
 317         bit_mask = (bit_mask << 8) | data[3];
 318
 319         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
 320
 321         /*KEY_MAIL or octave down*/
 322         if (pm->midi_mode && bit_mask == 0x004000) {
 323                 /* octave down */
 324                 pm->midi_octave--;
 325                 if (pm->midi_octave < -2)
 326                         pm->midi_octave = -2;
 327                 dbg_hid("pcmidi mode: %d octave: %d\n",
 328                         pm->midi_mode, pm->midi_octave);
 329                 return 1;
 330         }
 331         /*KEY_WWW or sustain*/
 332         else if (pm->midi_mode && bit_mask == 0x000004) {
 333                 /* sustain on/off*/
 334                 pm->midi_sustain_mode ^= 0x1;
 335                 return 1;
 336         }
 337
 338         return 0; /* continue key processing */
 339 }
 340
 341 static int pcmidi_handle_report3(struct pcmidi_snd *pm, u8 *data, int size)
 342 {
 343         struct pcmidi_sustain *pms;
 344         unsigned i, j;
 345         unsigned char status, note, velocity;
 346
 347         unsigned num_notes = (size-1)/2;
 348         for (j = 0; j < num_notes; j++) {
 349                 note = data[j*2+1];
 350                 velocity = data[j*2+2];
 351
 352                 if (note < 0x81) { /* note on */
 353                         status = 128 + 16 + pm->midi_channel; /* 1001nnnn */
 354                         note = note - 0x54 + PCMIDI_MIDDLE_C +
 355                                 (pm->midi_octave * 12);
 356                         if (0 == velocity)
 357                                 velocity = 1; /* force note on */
 358                 } else { /* note off */
 359                         status = 128 + pm->midi_channel; /* 1000nnnn */
 360                         note = note - 0x94 + PCMIDI_MIDDLE_C +
 361                                 (pm->midi_octave*12);
 362
 363                         if (pm->midi_sustain_mode) {
 364                                 for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
 365                                         pms = &pm->sustained_notes[i];
 366                                         if (!pms->in_use) {
 367                                                 pms->status = status;
 368                                                 pms->note = note;
 369                                                 pms->velocity = velocity;
 370                                                 pms->in_use = 1;
 371
 372                                                 mod_timer(&pms->timer,
 373                                                         jiffies +
 374                                         msecs_to_jiffies(pm->midi_sustain));
 375                                                 return 1;
 376                                         }
 377                                 }
 378                         }
 379                 }
 380                 pcmidi_send_note(pm, status, note, velocity);
 381         }
 382
 383         return 1;
 384 }
 385
 386 static int pcmidi_handle_report4(struct pcmidi_snd *pm, u8 *data)
 387 {
 388         unsigned        key;
 389         u32             bit_mask;
 390         u32             bit_index;
 391
 392         bit_mask = data[1];
 393         bit_mask = (bit_mask << 8) | data[2];
 394         bit_mask = (bit_mask << 8) | data[3];
 395
 396         /* break keys */
 397         for (bit_index = 0; bit_index < 24; bit_index++) {
 398                 if (!((0x01 << bit_index) & bit_mask)) {
 399                         input_event(pm->input_ep82, EV_KEY,
 400                                 pm->last_key[bit_index], 0);
 401                         pm->last_key[bit_index] = 0;
 402                 }
 403         }
 404
 405         /* make keys */
 406         for (bit_index = 0; bit_index < 24; bit_index++) {
 407                 key = 0;
 408                 switch ((0x01 << bit_index) & bit_mask) {
 409                 case 0x000010: /* Fn lock*/
 410                         pm->fn_state ^= 0x000010;
 411                         if (pm->fn_state)
 412                                 pcmidi_submit_output_report(pm, 0xc5);
 413                         else
 414                                 pcmidi_submit_output_report(pm, 0xc6);
 415                         continue;
 416                 case 0x020000: /* midi launcher..send a key (qwerty) or not? */
 417                         pcmidi_submit_output_report(pm, 0xc1);
 418                         pm->midi_mode ^= 0x01;
 419
 420                         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
 421                         continue;
 422                 case 0x100000: /* KEY_MESSENGER or octave up */
 423                         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
 424                         if (pm->midi_mode) {
 425                                 pm->midi_octave++;
 426                                 if (pm->midi_octave > 2)
 427                                         pm->midi_octave = 2;
 428                                 dbg_hid("pcmidi mode: %d octave: %d\n",
 429                                         pm->midi_mode, pm->midi_octave);
 430                                 continue;
 431                         } else
 432                                 key = KEY_MESSENGER;
 433                         break;
 434                 case 0x400000:
 435                         key = KEY_CALENDAR;
 436                         break;
 437                 case 0x080000:
 438                         key = KEY_ADDRESSBOOK;
 439                         break;
 440                 case 0x040000:
 441                         key = KEY_DOCUMENTS;
 442                         break;
 443                 case 0x800000:
 444                         key = KEY_WORDPROCESSOR;
 445                         break;
 446                 case 0x200000:
 447                         key = KEY_SPREADSHEET;
 448                         break;
 449                 case 0x010000:
 450                         key = KEY_COFFEE;
 451                         break;
 452                 case 0x000100:
 453                         key = KEY_HELP;
 454                         break;
 455                 case 0x000200:
 456                         key = KEY_SEND;
 457                         break;
 458                 case 0x000400:
 459                         key = KEY_REPLY;
 460                         break;
 461                 case 0x000800:
 462                         key = KEY_FORWARDMAIL;
 463                         break;
 464                 case 0x001000:
 465                         key = KEY_NEW;
 466                         break;
 467                 case 0x002000:
 468                         key = KEY_OPEN;
 469                         break;
 470                 case 0x004000:
 471                         key = KEY_CLOSE;
 472                         break;
 473                 case 0x008000:
 474                         key = KEY_SAVE;
 475                         break;
 476                 case 0x000001:
 477                         key = KEY_UNDO;
 478                         break;
 479                 case 0x000002:
 480                         key = KEY_REDO;
 481                         break;
 482                 case 0x000004:
 483                         key = KEY_SPELLCHECK;
 484                         break;
 485                 case 0x000008:
 486                         key = KEY_PRINT;
 487                         break;
 488                 }
 489                 if (key) {
 490                         input_event(pm->input_ep82, EV_KEY, key, 1);
 491                         pm->last_key[bit_index] = key;
 492                 }
 493         }
 494
 495         return 1;
 496 }
 497
 498 static int pcmidi_handle_report(
 499         struct pcmidi_snd *pm, unsigned report_id, u8 *data, int size)
 500 {
 501         int ret = 0;
 502
 503         switch (report_id) {
 504         case 0x01: /* midi keys (qwerty)*/
 505                 ret = pcmidi_handle_report1(pm, data);
 506                 break;
 507         case 0x03: /* midi keyboard (musical)*/
 508                 ret = pcmidi_handle_report3(pm, data, size);
 509                 break;
 510         case 0x04: /* multimedia/midi keys (qwerty)*/
 511                 ret = pcmidi_handle_report4(pm, data);
 512                 break;
 513         }
 514         return ret;
 515 }
 516
 517 static void pcmidi_setup_extra_keys(
 518         struct pcmidi_snd *pm, struct input_dev *input)
 519 {
 520         /* reassigned functionality for N/A keys
 521                 MY PICTURES =>  KEY_WORDPROCESSOR
 522                 MY MUSIC=>      KEY_SPREADSHEET
 523         */
 524         unsigned int keys[] = {
 525                 KEY_FN,
 526                 KEY_MESSENGER, KEY_CALENDAR,
 527                 KEY_ADDRESSBOOK, KEY_DOCUMENTS,
 528                 KEY_WORDPROCESSOR,
 529                 KEY_SPREADSHEET,
 530                 KEY_COFFEE,
 531                 KEY_HELP, KEY_SEND,
 532                 KEY_REPLY, KEY_FORWARDMAIL,
 533                 KEY_NEW, KEY_OPEN,
 534                 KEY_CLOSE, KEY_SAVE,
 535                 KEY_UNDO, KEY_REDO,
 536                 KEY_SPELLCHECK, KEY_PRINT,
 537                 0
 538         };
 539
 540         unsigned int *pkeys = &keys[0];
 541         unsigned short i;
 542
 543         if (pm->ifnum != 1)  /* only set up ONCE for interace 1 */
 544                 return;
 545
 546         pm->input_ep82 = input;
 547
 548         for (i = 0; i < 24; i++)
 549                 pm->last_key[i] = 0;
 550
 551         while (*pkeys != 0) {
 552                 set_bit(*pkeys, pm->input_ep82->keybit);
 553                 ++pkeys;
 554         }
 555 }
 556
 557 static int pcmidi_set_operational(struct pcmidi_snd *pm)
 558 {
 559         if (pm->ifnum != 1)
 560                 return 0; /* only set up ONCE for interace 1 */
 561
 562         pcmidi_get_output_report(pm);
 563         pcmidi_submit_output_report(pm, 0xc1);
 564         return 0;
 565 }
 566
 567 static int pcmidi_snd_free(struct snd_device *dev)
 568 {
 569         return 0;
 570 }
 571
 572 static int pcmidi_in_open(struct snd_rawmidi_substream *substream)
 573 {
 574         struct pcmidi_snd *pm = substream->rmidi->private_data;
 575
 576         dbg_hid("pcmidi in open\n");
 577         pm->in_substream = substream;
 578         return 0;
 579 }
 580
 581 static int pcmidi_in_close(struct snd_rawmidi_substream *substream)
 582 {
 583         dbg_hid("pcmidi in close\n");
 584         return 0;
 585 }
 586
 587 static void pcmidi_in_trigger(struct snd_rawmidi_substream *substream, int up)
 588 {
 589         struct pcmidi_snd *pm = substream->rmidi->private_data;
 590
 591         dbg_hid("pcmidi in trigger %d\n", up);
 592
 593         pm->in_triggered = up;
 594 }
 595
 596 static const struct snd_rawmidi_ops pcmidi_in_ops = {
 597         .open = pcmidi_in_open,
 598         .close = pcmidi_in_close,
 599         .trigger = pcmidi_in_trigger
 600 };
 601
 602 static int pcmidi_snd_initialise(struct pcmidi_snd *pm)
 603 {
 604         static int dev;
 605         struct snd_card *card;
 606         struct snd_rawmidi *rwmidi;
 607         int err;
 608
 609         static struct snd_device_ops ops = {
 610                 .dev_free = pcmidi_snd_free,
 611         };
 612
 613         if (pm->ifnum != 1)
 614                 return 0; /* only set up midi device ONCE for interace 1 */
 615
 616         if (dev >= SNDRV_CARDS)
 617                 return -ENODEV;
 618
 619         if (!enable[dev]) {
 620                 dev++;
 621                 return -ENOENT;
 622         }
 623
 624         /* Setup sound card */
 625
 626         err = snd_card_new(&pm->pk->hdev->dev, index[dev], id[dev],
 627                            THIS_MODULE, 0, &card);
 628         if (err < 0) {
 629                 pk_error("failed to create pc-midi sound card\n");
 630                 err = -ENOMEM;
 631                 goto fail;
 632         }
 633         pm->card = card;
 634
 635         /* Setup sound device */
 636         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pm, &ops);
 637         if (err < 0) {
 638                 pk_error("failed to create pc-midi sound device: error %d\n",
 639                         err);
 640                 goto fail;
 641         }
 642
 643         strncpy(card->driver, shortname, sizeof(card->driver));
 644         strncpy(card->shortname, shortname, sizeof(card->shortname));
 645         strncpy(card->longname, longname, sizeof(card->longname));
 646
 647         /* Set up rawmidi */
 648         err = snd_rawmidi_new(card, card->shortname, 0,
 649                               0, 1, &rwmidi);
 650         if (err < 0) {
 651                 pk_error("failed to create pc-midi rawmidi device: error %d\n",
 652                         err);
 653                 goto fail;
 654         }
 655         pm->rwmidi = rwmidi;
 656         strncpy(rwmidi->name, card->shortname, sizeof(rwmidi->name));
 657         rwmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT;
 658         rwmidi->private_data = pm;
 659
 660         snd_rawmidi_set_ops(rwmidi, SNDRV_RAWMIDI_STREAM_INPUT,
 661                 &pcmidi_in_ops);
 662
 663         /* create sysfs variables */
 664         err = device_create_file(&pm->pk->hdev->dev,
 665                                  sysfs_device_attr_channel);
 666         if (err < 0) {
 667                 pk_error("failed to create sysfs attribute channel: error %d\n",
 668                         err);
 669                 goto fail;
 670         }
 671
 672         err = device_create_file(&pm->pk->hdev->dev,
 673                                 sysfs_device_attr_sustain);
 674         if (err < 0) {
 675                 pk_error("failed to create sysfs attribute sustain: error %d\n",
 676                         err);
 677                 goto fail_attr_sustain;
 678         }
 679
 680         err = device_create_file(&pm->pk->hdev->dev,
 681                          sysfs_device_attr_octave);
 682         if (err < 0) {
 683                 pk_error("failed to create sysfs attribute octave: error %d\n",
 684                         err);
 685                 goto fail_attr_octave;
 686         }
 687
 688         spin_lock_init(&pm->rawmidi_in_lock);
 689
 690         init_sustain_timers(pm);
 691         pcmidi_set_operational(pm);
 692
 693         /* register it */
 694         err = snd_card_register(card);
 695         if (err < 0) {
 696                 pk_error("failed to register pc-midi sound card: error %d\n",
 697                          err);
 698                 goto fail_register;
 699         }
 700
 701         dbg_hid("pcmidi_snd_initialise finished ok\n");
 702         return 0;
 703
 704 fail_register:
 705         stop_sustain_timers(pm);
 706         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_octave);
 707 fail_attr_octave:
 708         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_sustain);
 709 fail_attr_sustain:
 710         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_channel);
 711 fail:
 712         if (pm->card) {
 713                 snd_card_free(pm->card);
 714                 pm->card = NULL;
 715         }
 716         return err;
 717 }
 718
 719 static int pcmidi_snd_terminate(struct pcmidi_snd *pm)
 720 {
 721         if (pm->card) {
 722                 stop_sustain_timers(pm);
 723
 724                 device_remove_file(&pm->pk->hdev->dev,
 725                         sysfs_device_attr_channel);
 726                 device_remove_file(&pm->pk->hdev->dev,
 727                         sysfs_device_attr_sustain);
 728                 device_remove_file(&pm->pk->hdev->dev,
 729                         sysfs_device_attr_octave);
 730
 731                 snd_card_disconnect(pm->card);
 732                 snd_card_free_when_closed(pm->card);
 733         }
 734
 735         return 0;
 736 }
 737
 738 /*
 739  * PC-MIDI report descriptor for report id is wrong.
 740  */
 741 static __u8 *pk_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 742                 unsigned int *rsize)
 743 {
 744         if (*rsize == 178 &&
 745               rdesc[111] == 0x06 && rdesc[112] == 0x00 &&
 746               rdesc[113] == 0xff) {
 747                 hid_info(hdev,
 748                          "fixing up pc-midi keyboard report descriptor\n");
 749
 750                 rdesc[144] = 0x18; /* report 4: was 0x10 report count */
 751         }
 752         return rdesc;
 753 }
 754
 755 static int pk_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 756                 struct hid_field *field, struct hid_usage *usage,
 757                 unsigned long **bit, int *max)
 758 {
 759         struct pk_device *pk = hid_get_drvdata(hdev);
 760         struct pcmidi_snd *pm;
 761
 762         pm = pk->pm;
 763
 764         if (HID_UP_MSVENDOR == (usage->hid & HID_USAGE_PAGE) &&
 765                 1 == pm->ifnum) {
 766                 pcmidi_setup_extra_keys(pm, hi->input);
 767                 return 0;
 768         }
 769
 770         return 0;
 771 }
 772
 773
 774 static int pk_raw_event(struct hid_device *hdev, struct hid_report *report,
 775         u8 *data, int size)
 776 {
 777         struct pk_device *pk = hid_get_drvdata(hdev);
 778         int ret = 0;
 779
 780         if (1 == pk->pm->ifnum) {
 781                 if (report->id == data[0])
 782                         switch (report->id) {
 783                         case 0x01: /* midi keys (qwerty)*/
 784                         case 0x03: /* midi keyboard (musical)*/
 785                         case 0x04: /* extra/midi keys (qwerty)*/
 786                                 ret = pcmidi_handle_report(pk->pm,
 787                                                 report->id, data, size);
 788                                 break;
 789                         }
 790         }
 791
 792         return ret;
 793 }
 794
 795 static int pk_probe(struct hid_device *hdev, const struct hid_device_id *id)
 796 {
 797         int ret;
 798         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 799         unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
 800         unsigned long quirks = id->driver_data;
 801         struct pk_device *pk;
 802         struct pcmidi_snd *pm = NULL;
 803
 804         pk = kzalloc(sizeof(*pk), GFP_KERNEL);
 805         if (pk == NULL) {
 806                 hid_err(hdev, "can't alloc descriptor\n");
 807                 return -ENOMEM;
 808         }
 809
 810         pk->hdev = hdev;
 811
 812         pm = kzalloc(sizeof(*pm), GFP_KERNEL);
 813         if (pm == NULL) {
 814                 hid_err(hdev, "can't alloc descriptor\n");
 815                 ret = -ENOMEM;
 816                 goto err_free_pk;
 817         }
 818
 819         pm->pk = pk;
 820         pk->pm = pm;
 821         pm->ifnum = ifnum;
 822
 823         hid_set_drvdata(hdev, pk);
 824
 825         ret = hid_parse(hdev);
 826         if (ret) {
 827                 hid_err(hdev, "hid parse failed\n");
 828                 goto err_free;
 829         }
 830
 831         if (quirks & PK_QUIRK_NOGET) { /* hid_parse cleared all the quirks */
 832                 hdev->quirks |= HID_QUIRK_NOGET;
 833         }
 834
 835         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 836         if (ret) {
 837                 hid_err(hdev, "hw start failed\n");
 838                 goto err_free;
 839         }
 840
 841         ret = pcmidi_snd_initialise(pm);
 842         if (ret < 0)
 843                 goto err_stop;
 844
 845         return 0;
 846 err_stop:
 847         hid_hw_stop(hdev);
 848 err_free:
 849         kfree(pm);
 850 err_free_pk:
 851         kfree(pk);
 852
 853         return ret;
 854 }
 855
 856 static void pk_remove(struct hid_device *hdev)
 857 {
 858         struct pk_device *pk = hid_get_drvdata(hdev);
 859         struct pcmidi_snd *pm;
 860
 861         pm = pk->pm;
 862         if (pm) {
 863                 pcmidi_snd_terminate(pm);
 864                 kfree(pm);
 865         }
 866
 867         hid_hw_stop(hdev);
 868
 869         kfree(pk);
 870 }
 871
 872 static const struct hid_device_id pk_devices[] = {
 873         {HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS,
 874                 USB_DEVICE_ID_PRODIKEYS_PCMIDI),
 875             .driver_data = PK_QUIRK_NOGET},
 876         { }
 877 };
 878 MODULE_DEVICE_TABLE(hid, pk_devices);
 879
 880 static struct hid_driver pk_driver = {
 881         .name = "prodikeys",
 882         .id_table = pk_devices,
 883         .report_fixup = pk_report_fixup,
 884         .input_mapping = pk_input_mapping,
 885         .raw_event = pk_raw_event,
 886         .probe = pk_probe,
 887         .remove = pk_remove,
 888 };
 889 module_hid_driver(pk_driver);
 890
 891 MODULE_LICENSE("GPL");