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 "usbhid/usbhid.h"
  30 #include "hid-ids.h"
  31
  32
  33 #define pk_debug(format, arg...) \
  34         pr_debug("hid-prodikeys: " format "\n" , ## arg)
  35 #define pk_error(format, arg...) \
  36         pr_err("hid-prodikeys: " format "\n" , ## arg)
  37
  38 struct pcmidi_snd;
  39
  40 struct pk_device {
  41         unsigned long           quirks;
  42
  43         struct hid_device       *hdev;
  44         struct pcmidi_snd       *pm; /* pcmidi device context */
  45 };
  46
  47 struct pcmidi_sustain {
  48         unsigned long           in_use;
  49         struct pcmidi_snd       *pm;
  50         struct timer_list       timer;
  51         unsigned char           status;
  52         unsigned char           note;
  53         unsigned char           velocity;
  54 };
  55
  56 #define PCMIDI_SUSTAINED_MAX    32
  57 struct pcmidi_snd {
  58         struct pk_device                *pk;
  59         unsigned short                  ifnum;
  60         struct hid_report               *pcmidi_report6;
  61         struct input_dev                *input_ep82;
  62         unsigned short                  midi_mode;
  63         unsigned short                  midi_sustain_mode;
  64         unsigned short                  midi_sustain;
  65         unsigned short                  midi_channel;
  66         short                           midi_octave;
  67         struct pcmidi_sustain           sustained_notes[PCMIDI_SUSTAINED_MAX];
  68         unsigned short                  fn_state;
  69         unsigned short                  last_key[24];
  70         spinlock_t                      rawmidi_in_lock;
  71         struct snd_card                 *card;
  72         struct snd_rawmidi              *rwmidi;
  73         struct snd_rawmidi_substream    *in_substream;
  74         struct snd_rawmidi_substream    *out_substream;
  75         unsigned long                   in_triggered;
  76         unsigned long                   out_active;
  77 };
  78
  79 #define PK_QUIRK_NOGET  0x00010000
  80 #define PCMIDI_MIDDLE_C 60
  81 #define PCMIDI_CHANNEL_MIN 0
  82 #define PCMIDI_CHANNEL_MAX 15
  83 #define PCMIDI_OCTAVE_MIN (-2)
  84 #define PCMIDI_OCTAVE_MAX 2
  85 #define PCMIDI_SUSTAIN_MIN 0
  86 #define PCMIDI_SUSTAIN_MAX 5000
  87
  88 static const char shortname[] = "PC-MIDI";
  89 static const char longname[] = "Prodikeys PC-MIDI Keyboard";
  90
  91 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
  92 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
  93 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  94
  95 module_param_array(index, int, NULL, 0444);
  96 module_param_array(id, charp, NULL, 0444);
  97 module_param_array(enable, bool, NULL, 0444);
  98 MODULE_PARM_DESC(index, "Index value for the PC-MIDI virtual audio driver");
  99 MODULE_PARM_DESC(id, "ID string for the PC-MIDI virtual audio driver");
 100 MODULE_PARM_DESC(enable, "Enable for the PC-MIDI virtual audio driver");
 101
 102
 103 /* Output routine for the sysfs channel file */
 104 static ssize_t show_channel(struct device *dev,
 105         struct device_attribute *attr, char *buf)
 106 {
 107         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 108         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 109
 110         dbg_hid("pcmidi sysfs read channel=%u\n", pk->pm->midi_channel);
 111
 112         return sprintf(buf, "%u (min:%u, max:%u)\n", pk->pm->midi_channel,
 113                 PCMIDI_CHANNEL_MIN, PCMIDI_CHANNEL_MAX);
 114 }
 115
 116 /* Input routine for the sysfs channel file */
 117 static ssize_t store_channel(struct device *dev,
 118         struct device_attribute *attr, const char *buf, size_t count)
 119 {
 120         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 121         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 122
 123         unsigned channel = 0;
 124
 125         if (sscanf(buf, "%u", &channel) > 0 && channel <= PCMIDI_CHANNEL_MAX) {
 126                 dbg_hid("pcmidi sysfs write channel=%u\n", channel);
 127                 pk->pm->midi_channel = channel;
 128                 return strlen(buf);
 129         }
 130         return -EINVAL;
 131 }
 132
 133 static DEVICE_ATTR(channel, S_IRUGO | S_IWUSR | S_IWGRP , show_channel,
 134                 store_channel);
 135
 136 static struct device_attribute *sysfs_device_attr_channel = {
 137                 &dev_attr_channel,
 138                 };
 139
 140 /* Output routine for the sysfs sustain file */
 141 static ssize_t show_sustain(struct device *dev,
 142  struct device_attribute *attr, char *buf)
 143 {
 144         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 145         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 146
 147         dbg_hid("pcmidi sysfs read sustain=%u\n", pk->pm->midi_sustain);
 148
 149         return sprintf(buf, "%u (off:%u, max:%u (ms))\n", pk->pm->midi_sustain,
 150                 PCMIDI_SUSTAIN_MIN, PCMIDI_SUSTAIN_MAX);
 151 }
 152
 153 /* Input routine for the sysfs sustain file */
 154 static ssize_t store_sustain(struct device *dev,
 155         struct device_attribute *attr, const char *buf, size_t count)
 156 {
 157         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 158         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 159
 160         unsigned sustain = 0;
 161
 162         if (sscanf(buf, "%u", &sustain) > 0 && sustain <= PCMIDI_SUSTAIN_MAX) {
 163                 dbg_hid("pcmidi sysfs write sustain=%u\n", sustain);
 164                 pk->pm->midi_sustain = sustain;
 165                 pk->pm->midi_sustain_mode =
 166                         (0 == sustain || !pk->pm->midi_mode) ? 0 : 1;
 167                 return strlen(buf);
 168         }
 169         return -EINVAL;
 170 }
 171
 172 static DEVICE_ATTR(sustain, S_IRUGO | S_IWUSR | S_IWGRP, show_sustain,
 173                 store_sustain);
 174
 175 static struct device_attribute *sysfs_device_attr_sustain = {
 176                 &dev_attr_sustain,
 177                 };
 178
 179 /* Output routine for the sysfs octave file */
 180 static ssize_t show_octave(struct device *dev,
 181         struct device_attribute *attr, char *buf)
 182 {
 183         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 184         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 185
 186         dbg_hid("pcmidi sysfs read octave=%d\n", pk->pm->midi_octave);
 187
 188         return sprintf(buf, "%d (min:%d, max:%d)\n", pk->pm->midi_octave,
 189                 PCMIDI_OCTAVE_MIN, PCMIDI_OCTAVE_MAX);
 190 }
 191
 192 /* Input routine for the sysfs octave file */
 193 static ssize_t store_octave(struct device *dev,
 194         struct device_attribute *attr, const char *buf, size_t count)
 195 {
 196         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 197         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 198
 199         int octave = 0;
 200
 201         if (sscanf(buf, "%d", &octave) > 0 &&
 202                 octave >= PCMIDI_OCTAVE_MIN && octave <= PCMIDI_OCTAVE_MAX) {
 203                 dbg_hid("pcmidi sysfs write octave=%d\n", octave);
 204                 pk->pm->midi_octave = octave;
 205                 return strlen(buf);
 206         }
 207         return -EINVAL;
 208 }
 209
 210 static DEVICE_ATTR(octave, S_IRUGO | S_IWUSR | S_IWGRP, show_octave,
 211                 store_octave);
 212
 213 static struct device_attribute *sysfs_device_attr_octave = {
 214                 &dev_attr_octave,
 215                 };
 216
 217
 218 static void pcmidi_send_note(struct pcmidi_snd *pm,
 219         unsigned char status, unsigned char note, unsigned char velocity)
 220 {
 221         unsigned long flags;
 222         unsigned char buffer[3];
 223
 224         buffer[0] = status;
 225         buffer[1] = note;
 226         buffer[2] = velocity;
 227
 228         spin_lock_irqsave(&pm->rawmidi_in_lock, flags);
 229
 230         if (!pm->in_substream)
 231                 goto drop_note;
 232         if (!test_bit(pm->in_substream->number, &pm->in_triggered))
 233                 goto drop_note;
 234
 235         snd_rawmidi_receive(pm->in_substream, buffer, 3);
 236
 237 drop_note:
 238         spin_unlock_irqrestore(&pm->rawmidi_in_lock, flags);
 239
 240         return;
 241 }
 242
 243 static void pcmidi_sustained_note_release(unsigned long data)
 244 {
 245         struct pcmidi_sustain *pms = (struct pcmidi_sustain *)data;
 246
 247         pcmidi_send_note(pms->pm, pms->status, pms->note, pms->velocity);
 248         pms->in_use = 0;
 249 }
 250
 251 static void init_sustain_timers(struct pcmidi_snd *pm)
 252 {
 253         struct pcmidi_sustain *pms;
 254         unsigned i;
 255
 256         for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
 257                 pms = &pm->sustained_notes[i];
 258                 pms->in_use = 0;
 259                 pms->pm = pm;
 260                 setup_timer(&pms->timer, pcmidi_sustained_note_release,
 261                         (unsigned long)pms);
 262         }
 263 }
 264
 265 static void stop_sustain_timers(struct pcmidi_snd *pm)
 266 {
 267         struct pcmidi_sustain *pms;
 268         unsigned i;
 269
 270         for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
 271                 pms = &pm->sustained_notes[i];
 272                 pms->in_use = 1;
 273                 del_timer_sync(&pms->timer);
 274         }
 275 }
 276
 277 static int pcmidi_get_output_report(struct pcmidi_snd *pm)
 278 {
 279         struct hid_device *hdev = pm->pk->hdev;
 280         struct hid_report *report;
 281
 282         list_for_each_entry(report,
 283                 &hdev->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 284                 if (!(6 == report->id))
 285                         continue;
 286
 287                 if (report->maxfield < 1) {
 288                         hid_err(hdev, "output report is empty\n");
 289                         break;
 290                 }
 291                 if (report->field[0]->report_count != 2) {
 292                         hid_err(hdev, "field count too low\n");
 293                         break;
 294                 }
 295                 pm->pcmidi_report6 = report;
 296                 return 0;
 297         }
 298         /* should never get here */
 299         return -ENODEV;
 300 }
 301
 302 static void pcmidi_submit_output_report(struct pcmidi_snd *pm, int state)
 303 {
 304         struct hid_device *hdev = pm->pk->hdev;
 305         struct hid_report *report = pm->pcmidi_report6;
 306         report->field[0]->value[0] = 0x01;
 307         report->field[0]->value[1] = state;
 308
 309         usbhid_submit_report(hdev, report, USB_DIR_OUT);
 310 }
 311
 312 static int pcmidi_handle_report1(struct pcmidi_snd *pm, u8 *data)
 313 {
 314         u32 bit_mask;
 315
 316         bit_mask = data[1];
 317         bit_mask = (bit_mask << 8) | data[2];
 318         bit_mask = (bit_mask << 8) | data[3];
 319
 320         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
 321
 322         /*KEY_MAIL or octave down*/
 323         if (pm->midi_mode && bit_mask == 0x004000) {
 324                 /* octave down */
 325                 pm->midi_octave--;
 326                 if (pm->midi_octave < -2)
 327                         pm->midi_octave = -2;
 328                 dbg_hid("pcmidi mode: %d octave: %d\n",
 329                         pm->midi_mode, pm->midi_octave);
 330                 return 1;
 331         }
 332         /*KEY_WWW or sustain*/
 333         else if (pm->midi_mode && bit_mask == 0x000004) {
 334                 /* sustain on/off*/
 335                 pm->midi_sustain_mode ^= 0x1;
 336                 return 1;
 337         }
 338
 339         return 0; /* continue key processing */
 340 }
 341
 342 static int pcmidi_handle_report3(struct pcmidi_snd *pm, u8 *data, int size)
 343 {
 344         struct pcmidi_sustain *pms;
 345         unsigned i, j;
 346         unsigned char status, note, velocity;
 347
 348         unsigned num_notes = (size-1)/2;
 349         for (j = 0; j < num_notes; j++) {
 350                 note = data[j*2+1];
 351                 velocity = data[j*2+2];
 352
 353                 if (note < 0x81) { /* note on */
 354                         status = 128 + 16 + pm->midi_channel; /* 1001nnnn */
 355                         note = note - 0x54 + PCMIDI_MIDDLE_C +
 356                                 (pm->midi_octave * 12);
 357                         if (0 == velocity)
 358                                 velocity = 1; /* force note on */
 359                 } else { /* note off */
 360                         status = 128 + pm->midi_channel; /* 1000nnnn */
 361                         note = note - 0x94 + PCMIDI_MIDDLE_C +
 362                                 (pm->midi_octave*12);
 363
 364                         if (pm->midi_sustain_mode) {
 365                                 for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
 366                                         pms = &pm->sustained_notes[i];
 367                                         if (!pms->in_use) {
 368                                                 pms->status = status;
 369                                                 pms->note = note;
 370                                                 pms->velocity = velocity;
 371                                                 pms->in_use = 1;
 372
 373                                                 mod_timer(&pms->timer,
 374                                                         jiffies +
 375                                         msecs_to_jiffies(pm->midi_sustain));
 376                                                 return 1;
 377                                         }
 378                                 }
 379                         }
 380                 }
 381                 pcmidi_send_note(pm, status, note, velocity);
 382         }
 383
 384         return 1;
 385 }
 386
 387 static int pcmidi_handle_report4(struct pcmidi_snd *pm, u8 *data)
 388 {
 389         unsigned        key;
 390         u32             bit_mask;
 391         u32             bit_index;
 392
 393         bit_mask = data[1];
 394         bit_mask = (bit_mask << 8) | data[2];
 395         bit_mask = (bit_mask << 8) | data[3];
 396
 397         /* break keys */
 398         for (bit_index = 0; bit_index < 24; bit_index++) {
 399                 key = pm->last_key[bit_index];
 400                 if (!((0x01 << bit_index) & bit_mask)) {
 401                         input_event(pm->input_ep82, EV_KEY,
 402                                 pm->last_key[bit_index], 0);
 403                                 pm->last_key[bit_index] = 0;
 404                 }
 405         }
 406
 407         /* make keys */
 408         for (bit_index = 0; bit_index < 24; bit_index++) {
 409                 key = 0;
 410                 switch ((0x01 << bit_index) & bit_mask) {
 411                 case 0x000010: /* Fn lock*/
 412                         pm->fn_state ^= 0x000010;
 413                         if (pm->fn_state)
 414                                 pcmidi_submit_output_report(pm, 0xc5);
 415                         else
 416                                 pcmidi_submit_output_report(pm, 0xc6);
 417                         continue;
 418                 case 0x020000: /* midi launcher..send a key (qwerty) or not? */
 419                         pcmidi_submit_output_report(pm, 0xc1);
 420                         pm->midi_mode ^= 0x01;
 421
 422                         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
 423                         continue;
 424                 case 0x100000: /* KEY_MESSENGER or octave up */
 425                         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
 426                         if (pm->midi_mode) {
 427                                 pm->midi_octave++;
 428                                 if (pm->midi_octave > 2)
 429                                         pm->midi_octave = 2;
 430                                 dbg_hid("pcmidi mode: %d octave: %d\n",
 431                                         pm->midi_mode, pm->midi_octave);
 432                             continue;
 433                         } else
 434                                 key = KEY_MESSENGER;
 435                         break;
 436                 case 0x400000:
 437                         key = KEY_CALENDAR;
 438                         break;
 439                 case 0x080000:
 440                         key = KEY_ADDRESSBOOK;
 441                         break;
 442                 case 0x040000:
 443                         key = KEY_DOCUMENTS;
 444                         break;
 445                 case 0x800000:
 446                         key = KEY_WORDPROCESSOR;
 447                         break;
 448                 case 0x200000:
 449                         key = KEY_SPREADSHEET;
 450                         break;
 451                 case 0x010000:
 452                         key = KEY_COFFEE;
 453                         break;
 454                 case 0x000100:
 455                         key = KEY_HELP;
 456                         break;
 457                 case 0x000200:
 458                         key = KEY_SEND;
 459                         break;
 460                 case 0x000400:
 461                         key = KEY_REPLY;
 462                         break;
 463                 case 0x000800:
 464                         key = KEY_FORWARDMAIL;
 465                         break;
 466                 case 0x001000:
 467                         key = KEY_NEW;
 468                         break;
 469                 case 0x002000:
 470                         key = KEY_OPEN;
 471                         break;
 472                 case 0x004000:
 473                         key = KEY_CLOSE;
 474                         break;
 475                 case 0x008000:
 476                         key = KEY_SAVE;
 477                         break;
 478                 case 0x000001:
 479                         key = KEY_UNDO;
 480                         break;
 481                 case 0x000002:
 482                         key = KEY_REDO;
 483                         break;
 484                 case 0x000004:
 485                         key = KEY_SPELLCHECK;
 486                         break;
 487                 case 0x000008:
 488                         key = KEY_PRINT;
 489                         break;
 490                 }
 491                 if (key) {
 492                         input_event(pm->input_ep82, EV_KEY, key, 1);
 493                         pm->last_key[bit_index] = key;
 494                 }
 495         }
 496
 497         return 1;
 498 }
 499
 500 static int pcmidi_handle_report(
 501         struct pcmidi_snd *pm, unsigned report_id, u8 *data, int size)
 502 {
 503         int ret = 0;
 504
 505         switch (report_id) {
 506         case 0x01: /* midi keys (qwerty)*/
 507                 ret = pcmidi_handle_report1(pm, data);
 508                 break;
 509         case 0x03: /* midi keyboard (musical)*/
 510                 ret = pcmidi_handle_report3(pm, data, size);
 511                 break;
 512         case 0x04: /* multimedia/midi keys (qwerty)*/
 513                 ret = pcmidi_handle_report4(pm, data);
 514                 break;
 515         }
 516         return ret;
 517 }
 518
 519 static void pcmidi_setup_extra_keys(
 520         struct pcmidi_snd *pm, struct input_dev *input)
 521 {
 522         /* reassigned functionality for N/A keys
 523                 MY PICTURES =>  KEY_WORDPROCESSOR
 524                 MY MUSIC=>      KEY_SPREADSHEET
 525         */
 526         unsigned int keys[] = {
 527                 KEY_FN,
 528                 KEY_MESSENGER, KEY_CALENDAR,
 529                 KEY_ADDRESSBOOK, KEY_DOCUMENTS,
 530                 KEY_WORDPROCESSOR,
 531                 KEY_SPREADSHEET,
 532                 KEY_COFFEE,
 533                 KEY_HELP, KEY_SEND,
 534                 KEY_REPLY, KEY_FORWARDMAIL,
 535                 KEY_NEW, KEY_OPEN,
 536                 KEY_CLOSE, KEY_SAVE,
 537                 KEY_UNDO, KEY_REDO,
 538                 KEY_SPELLCHECK, KEY_PRINT,
 539                 0
 540         };
 541
 542         unsigned int *pkeys = &keys[0];
 543         unsigned short i;
 544
 545         if (pm->ifnum != 1)  /* only set up ONCE for interace 1 */
 546                 return;
 547
 548         pm->input_ep82 = input;
 549
 550         for (i = 0; i < 24; i++)
 551                 pm->last_key[i] = 0;
 552
 553         while (*pkeys != 0) {
 554                 set_bit(*pkeys, pm->input_ep82->keybit);
 555                 ++pkeys;
 556         }
 557 }
 558
 559 static int pcmidi_set_operational(struct pcmidi_snd *pm)
 560 {
 561         if (pm->ifnum != 1)
 562                 return 0; /* only set up ONCE for interace 1 */
 563
 564         pcmidi_get_output_report(pm);
 565         pcmidi_submit_output_report(pm, 0xc1);
 566         return 0;
 567 }
 568
 569 static int pcmidi_snd_free(struct snd_device *dev)
 570 {
 571         return 0;
 572 }
 573
 574 static int pcmidi_in_open(struct snd_rawmidi_substream *substream)
 575 {
 576         struct pcmidi_snd *pm = substream->rmidi->private_data;
 577
 578         dbg_hid("pcmidi in open\n");
 579         pm->in_substream = substream;
 580         return 0;
 581 }
 582
 583 static int pcmidi_in_close(struct snd_rawmidi_substream *substream)
 584 {
 585         dbg_hid("pcmidi in close\n");
 586         return 0;
 587 }
 588
 589 static void pcmidi_in_trigger(struct snd_rawmidi_substream *substream, int up)
 590 {
 591         struct pcmidi_snd *pm = substream->rmidi->private_data;
 592
 593         dbg_hid("pcmidi in trigger %d\n", up);
 594
 595         pm->in_triggered = up;
 596 }
 597
 598 static struct snd_rawmidi_ops pcmidi_in_ops = {
 599         .open = pcmidi_in_open,
 600         .close = pcmidi_in_close,
 601         .trigger = pcmidi_in_trigger
 602 };
 603
 604 static int pcmidi_snd_initialise(struct pcmidi_snd *pm)
 605 {
 606         static int dev;
 607         struct snd_card *card;
 608         struct snd_rawmidi *rwmidi;
 609         int err;
 610
 611         static struct snd_device_ops ops = {
 612                 .dev_free = pcmidi_snd_free,
 613         };
 614
 615         if (pm->ifnum != 1)
 616                 return 0; /* only set up midi device ONCE for interace 1 */
 617
 618         if (dev >= SNDRV_CARDS)
 619                 return -ENODEV;
 620
 621         if (!enable[dev]) {
 622                 dev++;
 623                 return -ENOENT;
 624         }
 625
 626         /* Setup sound card */
 627
 628         err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 629         if (err < 0) {
 630                 pk_error("failed to create pc-midi sound card\n");
 631                 err = -ENOMEM;
 632                 goto fail;
 633         }
 634         pm->card = card;
 635
 636         /* Setup sound device */
 637         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pm, &ops);
 638         if (err < 0) {
 639                 pk_error("failed to create pc-midi sound device: error %d\n",
 640                         err);
 641                 goto fail;
 642         }
 643
 644         strncpy(card->driver, shortname, sizeof(card->driver));
 645         strncpy(card->shortname, shortname, sizeof(card->shortname));
 646         strncpy(card->longname, longname, sizeof(card->longname));
 647
 648         /* Set up rawmidi */
 649         err = snd_rawmidi_new(card, card->shortname, 0,
 650                               0, 1, &rwmidi);
 651         if (err < 0) {
 652                 pk_error("failed to create pc-midi rawmidi device: error %d\n",
 653                         err);
 654                 goto fail;
 655         }
 656         pm->rwmidi = rwmidi;
 657         strncpy(rwmidi->name, card->shortname, sizeof(rwmidi->name));
 658         rwmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT;
 659         rwmidi->private_data = pm;
 660
 661         snd_rawmidi_set_ops(rwmidi, SNDRV_RAWMIDI_STREAM_INPUT,
 662                 &pcmidi_in_ops);
 663
 664         snd_card_set_dev(card, &pm->pk->hdev->dev);
 665
 666         /* create sysfs variables */
 667         err = device_create_file(&pm->pk->hdev->dev,
 668                                  sysfs_device_attr_channel);
 669         if (err < 0) {
 670                 pk_error("failed to create sysfs attribute channel: error %d\n",
 671                         err);
 672                 goto fail;
 673         }
 674
 675         err = device_create_file(&pm->pk->hdev->dev,
 676                                 sysfs_device_attr_sustain);
 677         if (err < 0) {
 678                 pk_error("failed to create sysfs attribute sustain: error %d\n",
 679                         err);
 680                 goto fail_attr_sustain;
 681         }
 682
 683         err = device_create_file(&pm->pk->hdev->dev,
 684                          sysfs_device_attr_octave);
 685         if (err < 0) {
 686                 pk_error("failed to create sysfs attribute octave: error %d\n",
 687                         err);
 688                 goto fail_attr_octave;
 689         }
 690
 691         spin_lock_init(&pm->rawmidi_in_lock);
 692
 693         init_sustain_timers(pm);
 694         pcmidi_set_operational(pm);
 695
 696         /* register it */
 697         err = snd_card_register(card);
 698         if (err < 0) {
 699                 pk_error("failed to register pc-midi sound card: error %d\n",
 700                          err);
 701                          goto fail_register;
 702         }
 703
 704         dbg_hid("pcmidi_snd_initialise finished ok\n");
 705         return 0;
 706
 707 fail_register:
 708         stop_sustain_timers(pm);
 709         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_octave);
 710 fail_attr_octave:
 711         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_sustain);
 712 fail_attr_sustain:
 713         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_channel);
 714 fail:
 715         if (pm->card) {
 716                 snd_card_free(pm->card);
 717                 pm->card = NULL;
 718         }
 719         return err;
 720 }
 721
 722 static int pcmidi_snd_terminate(struct pcmidi_snd *pm)
 723 {
 724         if (pm->card) {
 725                 stop_sustain_timers(pm);
 726
 727                 device_remove_file(&pm->pk->hdev->dev,
 728                         sysfs_device_attr_channel);
 729                 device_remove_file(&pm->pk->hdev->dev,
 730                         sysfs_device_attr_sustain);
 731                 device_remove_file(&pm->pk->hdev->dev,
 732                         sysfs_device_attr_octave);
 733
 734                 snd_card_disconnect(pm->card);
 735                 snd_card_free_when_closed(pm->card);
 736         }
 737
 738         return 0;
 739 }
 740
 741 /*
 742  * PC-MIDI report descriptor for report id is wrong.
 743  */
 744 static __u8 *pk_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 745                 unsigned int *rsize)
 746 {
 747         if (*rsize == 178 &&
 748               rdesc[111] == 0x06 && rdesc[112] == 0x00 &&
 749               rdesc[113] == 0xff) {
 750                 hid_info(hdev,
 751                          "fixing up pc-midi keyboard report descriptor\n");
 752
 753                 rdesc[144] = 0x18; /* report 4: was 0x10 report count */
 754         }
 755         return rdesc;
 756 }
 757
 758 static int pk_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 759                 struct hid_field *field, struct hid_usage *usage,
 760                 unsigned long **bit, int *max)
 761 {
 762         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 763         struct pcmidi_snd *pm;
 764
 765         pm = pk->pm;
 766
 767         if (HID_UP_MSVENDOR == (usage->hid & HID_USAGE_PAGE) &&
 768                 1 == pm->ifnum) {
 769                 pcmidi_setup_extra_keys(pm, hi->input);
 770                 return 0;
 771         }
 772
 773         return 0;
 774 }
 775
 776
 777 static int pk_raw_event(struct hid_device *hdev, struct hid_report *report,
 778         u8 *data, int size)
 779 {
 780         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 781         int ret = 0;
 782
 783         if (1 == pk->pm->ifnum) {
 784                 if (report->id == data[0])
 785                         switch (report->id) {
 786                         case 0x01: /* midi keys (qwerty)*/
 787                         case 0x03: /* midi keyboard (musical)*/
 788                         case 0x04: /* extra/midi keys (qwerty)*/
 789                                 ret = pcmidi_handle_report(pk->pm,
 790                                                 report->id, data, size);
 791                                 break;
 792                         }
 793         }
 794
 795         return ret;
 796 }
 797
 798 static int pk_probe(struct hid_device *hdev, const struct hid_device_id *id)
 799 {
 800         int ret;
 801         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 802         unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
 803         unsigned long quirks = id->driver_data;
 804         struct pk_device *pk;
 805         struct pcmidi_snd *pm = NULL;
 806
 807         pk = kzalloc(sizeof(*pk), GFP_KERNEL);
 808         if (pk == NULL) {
 809                 hid_err(hdev, "can't alloc descriptor\n");
 810                 return -ENOMEM;
 811         }
 812
 813         pk->hdev = hdev;
 814
 815         pm = kzalloc(sizeof(*pm), GFP_KERNEL);
 816         if (pm == NULL) {
 817                 hid_err(hdev, "can't alloc descriptor\n");
 818                 ret = -ENOMEM;
 819                 goto err_free;
 820         }
 821
 822         pm->pk = pk;
 823         pk->pm = pm;
 824         pm->ifnum = ifnum;
 825
 826         hid_set_drvdata(hdev, pk);
 827
 828         ret = hid_parse(hdev);
 829         if (ret) {
 830                 hid_err(hdev, "hid parse failed\n");
 831                 goto err_free;
 832         }
 833
 834         if (quirks & PK_QUIRK_NOGET) { /* hid_parse cleared all the quirks */
 835                 hdev->quirks |= HID_QUIRK_NOGET;
 836         }
 837
 838         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 839         if (ret) {
 840                 hid_err(hdev, "hw start failed\n");
 841                 goto err_free;
 842         }
 843
 844         ret = pcmidi_snd_initialise(pm);
 845         if (ret < 0)
 846                 goto err_stop;
 847
 848         return 0;
 849 err_stop:
 850         hid_hw_stop(hdev);
 851 err_free:
 852         if (pm != NULL)
 853                 kfree(pm);
 854
 855         kfree(pk);
 856         return ret;
 857 }
 858
 859 static void pk_remove(struct hid_device *hdev)
 860 {
 861         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
 862         struct pcmidi_snd *pm;
 863
 864         pm = pk->pm;
 865         if (pm) {
 866                 pcmidi_snd_terminate(pm);
 867                 kfree(pm);
 868         }
 869
 870         hid_hw_stop(hdev);
 871
 872         kfree(pk);
 873 }
 874
 875 static const struct hid_device_id pk_devices[] = {
 876         {HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS,
 877                 USB_DEVICE_ID_PRODIKEYS_PCMIDI),
 878             .driver_data = PK_QUIRK_NOGET},
 879         { }
 880 };
 881 MODULE_DEVICE_TABLE(hid, pk_devices);
 882
 883 static struct hid_driver pk_driver = {
 884         .name = "prodikeys",
 885         .id_table = pk_devices,
 886         .report_fixup = pk_report_fixup,
 887         .input_mapping = pk_input_mapping,
 888         .raw_event = pk_raw_event,
 889         .probe = pk_probe,
 890         .remove = pk_remove,
 891 };
 892
 893 static int pk_init(void)
 894 {
 895         int ret;
 896
 897         ret = hid_register_driver(&pk_driver);
 898         if (ret)
 899                 pr_err("can't register prodikeys driver\n");
 900
 901         return ret;
 902 }
 903
 904 static void pk_exit(void)
 905 {
 906         hid_unregister_driver(&pk_driver);
 907 }
 908
 909 module_init(pk_init);
 910 module_exit(pk_exit);
 911 MODULE_LICENSE("GPL");