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   1 /*
   2  * Line6 Linux USB driver - 0.8.0
   3  *
   4  * Copyright (C) 2004-2009 Markus Grabner (grabner@icg.tugraz.at)
   5  *
   6  *      This program is free software; you can redistribute it and/or
   7  *      modify it under the terms of the GNU General Public License as
   8  *      published by the Free Software Foundation, version 2.
   9  *
  10  */
  11
  12 #include "driver.h"
  13
  14 #include <linux/slab.h>
  15
  16 #include "audio.h"
  17 #include "control.h"
  18 #include "variax.h"
  19
  20
  21 #define VARIAX_SYSEX_CODE 7
  22 #define VARIAX_SYSEX_PARAM 0x3b
  23 #define VARIAX_SYSEX_ACTIVATE 0x2a
  24 #define VARIAX_MODEL_HEADER_LENGTH 7
  25 #define VARIAX_MODEL_MESSAGE_LENGTH 199
  26 #define VARIAX_OFFSET_ACTIVATE 7
  27
  28
  29 static const char variax_activate[] = {
  30         0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x2a, 0x01,
  31         0xf7
  32 };
  33 static const char variax_request_bank[] = {
  34         0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x6d, 0xf7
  35 };
  36 static const char variax_request_model1[] = {
  37         0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x3c, 0x00,
  38         0x02, 0x00, 0x00, 0x00, 0x00, 0x03, 0x05, 0x03,
  39         0x00, 0x00, 0x00, 0xf7
  40 };
  41 static const char variax_request_model2[] = {
  42         0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x3c, 0x00,
  43         0x02, 0x00, 0x00, 0x00, 0x00, 0x03, 0x07, 0x03,
  44         0x00, 0x00, 0x00, 0xf7
  45 };
  46
  47
  48 /*
  49         Decode data transmitted by workbench.
  50 */
  51 static void variax_decode(const unsigned char *raw_data, unsigned char *data,
  52                           int raw_size)
  53 {
  54         for (; raw_size > 0; raw_size -= 6) {
  55                 data[2] = raw_data[0] | (raw_data[1] << 4);
  56                 data[1] = raw_data[2] | (raw_data[3] << 4);
  57                 data[0] = raw_data[4] | (raw_data[5] << 4);
  58                 raw_data += 6;
  59                 data += 3;
  60         }
  61 }
  62
  63 static void variax_activate_timeout(unsigned long arg)
  64 {
  65         struct usb_line6_variax *variax = (struct usb_line6_variax *)arg;
  66         variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = 1;
  67         line6_send_raw_message_async(&variax->line6, variax->buffer_activate,
  68                                      sizeof(variax_activate));
  69 }
  70
  71 /*
  72         Send an asynchronous activation request after a given interval.
  73 */
  74 static void variax_activate_delayed(struct usb_line6_variax *variax,
  75                                     int seconds)
  76 {
  77         variax->activate_timer.expires = jiffies + seconds * HZ;
  78         variax->activate_timer.function = variax_activate_timeout;
  79         variax->activate_timer.data = (unsigned long)variax;
  80         add_timer(&variax->activate_timer);
  81 }
  82
  83 static void variax_startup_timeout(unsigned long arg)
  84 {
  85         struct usb_line6_variax *variax = (struct usb_line6_variax *)arg;
  86
  87         if (variax->dumpreq.ok)
  88                 return;
  89
  90         line6_dump_request_async(&variax->dumpreq, &variax->line6, 0);
  91         line6_startup_delayed(&variax->dumpreq, 1, variax_startup_timeout,
  92                               variax);
  93 }
  94
  95 /*
  96         Process a completely received message.
  97 */
  98 void variax_process_message(struct usb_line6_variax *variax)
  99 {
 100         const unsigned char *buf = variax->line6.buffer_message;
 101
 102         switch (buf[0]) {
 103         case LINE6_PARAM_CHANGE | LINE6_CHANNEL_HOST:
 104                 switch (buf[1]) {
 105                 case VARIAXMIDI_volume:
 106                         variax->volume = buf[2];
 107                         break;
 108
 109                 case VARIAXMIDI_tone:
 110                         variax->tone = buf[2];
 111                 }
 112
 113                 break;
 114
 115         case LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_DEVICE:
 116         case LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_HOST:
 117                 variax->model = buf[1];
 118                 line6_dump_request_async(&variax->dumpreq, &variax->line6, 0);
 119                 break;
 120
 121         case LINE6_RESET:
 122                 dev_info(variax->line6.ifcdev, "VARIAX reset\n");
 123                 variax_activate_delayed(variax, VARIAX_ACTIVATE_DELAY);
 124                 break;
 125
 126         case LINE6_SYSEX_BEGIN:
 127                 if (memcmp(buf + 1, variax_request_model1 + 1,
 128                            VARIAX_MODEL_HEADER_LENGTH - 1) == 0) {
 129                         if (variax->line6.message_length ==
 130                             VARIAX_MODEL_MESSAGE_LENGTH) {
 131                                 switch (variax->dumpreq.in_progress) {
 132                                 case VARIAX_DUMP_PASS1:
 133                                         variax_decode(buf + VARIAX_MODEL_HEADER_LENGTH, (unsigned char *)&variax->model_data,
 134                                                                                                 (sizeof(variax->model_data.name) + sizeof(variax->model_data.control) / 2) * 2);
 135                                         line6_dump_request_async(&variax->dumpreq, &variax->line6, 1);
 136                                         line6_dump_started(&variax->dumpreq, VARIAX_DUMP_PASS2);
 137                                         break;
 138
 139                                 case VARIAX_DUMP_PASS2:
 140                                         /* model name is transmitted twice, so skip it here: */
 141                                         variax_decode(buf + VARIAX_MODEL_HEADER_LENGTH,
 142                                                       (unsigned char *)&variax->model_data.control + sizeof(variax->model_data.control) / 2,
 143                                                       sizeof(variax->model_data.control) / 2 * 2);
 144                                         variax->dumpreq.ok = 1;
 145                                         line6_dump_request_async(&variax->dumpreq, &variax->line6, 2);
 146                                         line6_dump_started(&variax->dumpreq, VARIAX_DUMP_PASS3);
 147                                 }
 148                         } else {
 149                                 DEBUG_MESSAGES(dev_err(variax->line6.ifcdev, "illegal length %d of model data\n", variax->line6.message_length));
 150                                 line6_dump_finished(&variax->dumpreq);
 151                         }
 152                 } else if (memcmp(buf + 1, variax_request_bank + 1,
 153                                 sizeof(variax_request_bank) - 2) == 0) {
 154                         memcpy(variax->bank,
 155                                buf + sizeof(variax_request_bank) - 1,
 156                                sizeof(variax->bank));
 157                         variax->dumpreq.ok = 1;
 158                         line6_dump_finished(&variax->dumpreq);
 159                 }
 160
 161                 break;
 162
 163         case LINE6_SYSEX_END:
 164                 break;
 165
 166         default:
 167                 DEBUG_MESSAGES(dev_err(variax->line6.ifcdev, "Variax: unknown message %02X\n", buf[0]));
 168         }
 169 }
 170
 171 /*
 172         "read" request on "volume" special file.
 173 */
 174 static ssize_t variax_get_volume(struct device *dev,
 175                                  struct device_attribute *attr, char *buf)
 176 {
 177         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 178         return sprintf(buf, "%d\n", variax->volume);
 179 }
 180
 181 /*
 182         "write" request on "volume" special file.
 183 */
 184 static ssize_t variax_set_volume(struct device *dev,
 185                                  struct device_attribute *attr,
 186                                  const char *buf, size_t count)
 187 {
 188         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 189         unsigned long value;
 190         int ret;
 191
 192         ret = strict_strtoul(buf, 10, &value);
 193         if (ret)
 194                 return ret;
 195
 196         if (line6_transmit_parameter(&variax->line6, VARIAXMIDI_volume,
 197                                      value) == 0)
 198                 variax->volume = value;
 199
 200         return count;
 201 }
 202
 203 /*
 204         "read" request on "model" special file.
 205 */
 206 static ssize_t variax_get_model(struct device *dev,
 207                                 struct device_attribute *attr, char *buf)
 208 {
 209         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 210         return sprintf(buf, "%d\n", variax->model);
 211 }
 212
 213 /*
 214         "write" request on "model" special file.
 215 */
 216 static ssize_t variax_set_model(struct device *dev,
 217                                 struct device_attribute *attr,
 218                                 const char *buf, size_t count)
 219 {
 220         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 221         unsigned long value;
 222         int ret;
 223
 224         ret = strict_strtoul(buf, 10, &value);
 225         if (ret)
 226                 return ret;
 227
 228         if (line6_send_program(&variax->line6, value) == 0)
 229                 variax->model = value;
 230
 231         return count;
 232 }
 233
 234 /*
 235         "read" request on "active" special file.
 236 */
 237 static ssize_t variax_get_active(struct device *dev,
 238                                  struct device_attribute *attr, char *buf)
 239 {
 240         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 241         return sprintf(buf, "%d\n", variax->buffer_activate[VARIAX_OFFSET_ACTIVATE]);
 242 }
 243
 244 /*
 245         "write" request on "active" special file.
 246 */
 247 static ssize_t variax_set_active(struct device *dev,
 248                                  struct device_attribute *attr,
 249                                  const char *buf, size_t count)
 250 {
 251         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 252         unsigned long value;
 253         int ret;
 254
 255         ret = strict_strtoul(buf, 10, &value);
 256         if (ret)
 257                 return ret;
 258
 259         variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = value ? 1 : 0;
 260         line6_send_raw_message_async(&variax->line6, variax->buffer_activate,
 261                                      sizeof(variax_activate));
 262         return count;
 263 }
 264
 265 /*
 266         "read" request on "tone" special file.
 267 */
 268 static ssize_t variax_get_tone(struct device *dev,
 269                                struct device_attribute *attr, char *buf)
 270 {
 271         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 272         return sprintf(buf, "%d\n", variax->tone);
 273 }
 274
 275 /*
 276         "write" request on "tone" special file.
 277 */
 278 static ssize_t variax_set_tone(struct device *dev,
 279                                struct device_attribute *attr,
 280                                const char *buf, size_t count)
 281 {
 282         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 283         unsigned long value;
 284         int ret;
 285
 286         ret = strict_strtoul(buf, 10, &value);
 287         if (ret)
 288                 return ret;
 289
 290         if (line6_transmit_parameter(&variax->line6, VARIAXMIDI_tone,
 291                                      value) == 0)
 292                 variax->tone = value;
 293
 294         return count;
 295 }
 296
 297 static ssize_t get_string(char *buf, const char *data, int length)
 298 {
 299         int i;
 300         memcpy(buf, data, length);
 301
 302         for (i = length; i--;) {
 303                 char c = buf[i];
 304
 305                 if ((c != 0) && (c != ' '))
 306                         break;
 307         }
 308
 309         buf[i + 1] = '\n';
 310         return i + 2;
 311 }
 312
 313 /*
 314         "read" request on "name" special file.
 315 */
 316 static ssize_t variax_get_name(struct device *dev,
 317                                struct device_attribute *attr, char *buf)
 318 {
 319         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 320         line6_wait_dump(&variax->dumpreq, 0);
 321         return get_string(buf, variax->model_data.name,
 322                           sizeof(variax->model_data.name));
 323 }
 324
 325 /*
 326         "read" request on "bank" special file.
 327 */
 328 static ssize_t variax_get_bank(struct device *dev,
 329                                struct device_attribute *attr, char *buf)
 330 {
 331         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 332         line6_wait_dump(&variax->dumpreq, 0);
 333         return get_string(buf, variax->bank, sizeof(variax->bank));
 334 }
 335
 336 /*
 337         "read" request on "dump" special file.
 338 */
 339 static ssize_t variax_get_dump(struct device *dev,
 340                                struct device_attribute *attr, char *buf)
 341 {
 342         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 343         int retval;
 344         retval = line6_wait_dump(&variax->dumpreq, 0);
 345         if (retval < 0)
 346                 return retval;
 347         memcpy(buf, &variax->model_data.control,
 348                sizeof(variax->model_data.control));
 349         return sizeof(variax->model_data.control);
 350 }
 351
 352 #if CREATE_RAW_FILE
 353
 354 /*
 355         "write" request on "raw" special file.
 356 */
 357 static ssize_t variax_set_raw2(struct device *dev,
 358                                struct device_attribute *attr,
 359                                const char *buf, size_t count)
 360 {
 361         struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
 362         int size;
 363         int i;
 364         char *sysex;
 365
 366         count -= count % 3;
 367         size = count * 2;
 368         sysex = variax_alloc_sysex_buffer(variax, VARIAX_SYSEX_PARAM, size);
 369
 370         if (!sysex)
 371                 return 0;
 372
 373         for (i = 0; i < count; i += 3) {
 374                 const unsigned char *p1 = buf + i;
 375                 char *p2 = sysex + SYSEX_DATA_OFS + i * 2;
 376                 p2[0] = p1[2] & 0x0f;
 377                 p2[1] = p1[2] >> 4;
 378                 p2[2] = p1[1] & 0x0f;
 379                 p2[3] = p1[1] >> 4;
 380                 p2[4] = p1[0] & 0x0f;
 381                 p2[5] = p1[0] >> 4;
 382         }
 383
 384         line6_send_sysex_message(&variax->line6, sysex, size);
 385         kfree(sysex);
 386         return count;
 387 }
 388
 389 #endif
 390
 391 /* Variax workbench special files: */
 392 static DEVICE_ATTR(model, S_IWUGO | S_IRUGO, variax_get_model, variax_set_model);
 393 static DEVICE_ATTR(volume, S_IWUGO | S_IRUGO, variax_get_volume, variax_set_volume);
 394 static DEVICE_ATTR(tone, S_IWUGO | S_IRUGO, variax_get_tone, variax_set_tone);
 395 static DEVICE_ATTR(name, S_IRUGO, variax_get_name, line6_nop_write);
 396 static DEVICE_ATTR(bank, S_IRUGO, variax_get_bank, line6_nop_write);
 397 static DEVICE_ATTR(dump, S_IRUGO, variax_get_dump, line6_nop_write);
 398 static DEVICE_ATTR(active, S_IWUGO | S_IRUGO, variax_get_active, variax_set_active);
 399
 400 #if CREATE_RAW_FILE
 401 static DEVICE_ATTR(raw, S_IWUGO, line6_nop_read, line6_set_raw);
 402 static DEVICE_ATTR(raw2, S_IWUGO, line6_nop_read, variax_set_raw2);
 403 #endif
 404
 405
 406 /*
 407         Variax destructor.
 408 */
 409 static void variax_destruct(struct usb_interface *interface)
 410 {
 411         struct usb_line6_variax *variax = usb_get_intfdata(interface);
 412         struct usb_line6 *line6;
 413
 414         if (variax == NULL)
 415                 return;
 416         line6 = &variax->line6;
 417         if (line6 == NULL)
 418                 return;
 419         line6_cleanup_audio(line6);
 420
 421         /* free dump request data: */
 422         line6_dumpreq_destructbuf(&variax->dumpreq, 2);
 423         line6_dumpreq_destructbuf(&variax->dumpreq, 1);
 424         line6_dumpreq_destruct(&variax->dumpreq);
 425
 426         kfree(variax->buffer_activate);
 427         del_timer_sync(&variax->activate_timer);
 428 }
 429
 430 /*
 431         Create sysfs entries.
 432 */
 433 static int variax_create_files2(struct device *dev)
 434 {
 435         int err;
 436         CHECK_RETURN(device_create_file(dev, &dev_attr_model));
 437         CHECK_RETURN(device_create_file(dev, &dev_attr_volume));
 438         CHECK_RETURN(device_create_file(dev, &dev_attr_tone));
 439         CHECK_RETURN(device_create_file(dev, &dev_attr_name));
 440         CHECK_RETURN(device_create_file(dev, &dev_attr_bank));
 441         CHECK_RETURN(device_create_file(dev, &dev_attr_dump));
 442         CHECK_RETURN(device_create_file(dev, &dev_attr_active));
 443 #if CREATE_RAW_FILE
 444         CHECK_RETURN(device_create_file(dev, &dev_attr_raw));
 445         CHECK_RETURN(device_create_file(dev, &dev_attr_raw2));
 446 #endif
 447         return 0;
 448 }
 449
 450 /*
 451          Init workbench device.
 452 */
 453 int variax_init(struct usb_interface *interface,
 454                 struct usb_line6_variax *variax)
 455 {
 456         int err;
 457
 458         if ((interface == NULL) || (variax == NULL))
 459                 return -ENODEV;
 460
 461         /* initialize USB buffers: */
 462         err = line6_dumpreq_init(&variax->dumpreq, variax_request_model1,
 463                                  sizeof(variax_request_model1));
 464
 465         if (err < 0) {
 466                 dev_err(&interface->dev, "Out of memory\n");
 467                 variax_destruct(interface);
 468                 return err;
 469         }
 470
 471         err = line6_dumpreq_initbuf(&variax->dumpreq, variax_request_model2,
 472                                     sizeof(variax_request_model2), 1);
 473
 474         if (err < 0) {
 475                 dev_err(&interface->dev, "Out of memory\n");
 476                 variax_destruct(interface);
 477                 return err;
 478         }
 479
 480         err = line6_dumpreq_initbuf(&variax->dumpreq, variax_request_bank,
 481                                     sizeof(variax_request_bank), 2);
 482
 483         if (err < 0) {
 484                 dev_err(&interface->dev, "Out of memory\n");
 485                 variax_destruct(interface);
 486                 return err;
 487         }
 488
 489         variax->buffer_activate = kmemdup(variax_activate,
 490                                           sizeof(variax_activate), GFP_KERNEL);
 491
 492         if (variax->buffer_activate == NULL) {
 493                 dev_err(&interface->dev, "Out of memory\n");
 494                 variax_destruct(interface);
 495                 return -ENOMEM;
 496         }
 497
 498         init_timer(&variax->activate_timer);
 499
 500         /* create sysfs entries: */
 501         err = variax_create_files(0, 0, &interface->dev);
 502         if (err < 0) {
 503                 variax_destruct(interface);
 504                 return err;
 505         }
 506
 507         err = variax_create_files2(&interface->dev);
 508         if (err < 0) {
 509                 variax_destruct(interface);
 510                 return err;
 511         }
 512
 513         /* initialize audio system: */
 514         err = line6_init_audio(&variax->line6);
 515         if (err < 0) {
 516                 variax_destruct(interface);
 517                 return err;
 518         }
 519
 520         /* initialize MIDI subsystem: */
 521         err = line6_init_midi(&variax->line6);
 522         if (err < 0) {
 523                 variax_destruct(interface);
 524                 return err;
 525         }
 526
 527         /* register audio system: */
 528         err = line6_register_audio(&variax->line6);
 529         if (err < 0) {
 530                 variax_destruct(interface);
 531                 return err;
 532         }
 533
 534         variax_activate_delayed(variax, VARIAX_ACTIVATE_DELAY);
 535         line6_startup_delayed(&variax->dumpreq, VARIAX_STARTUP_DELAY,
 536                               variax_startup_timeout, variax);
 537         return 0;
 538 }
 539
 540 /*
 541         Workbench device disconnected.
 542 */
 543 void variax_disconnect(struct usb_interface *interface)
 544 {
 545         struct device *dev;
 546
 547         if (interface == NULL)
 548                 return;
 549         dev = &interface->dev;
 550
 551         if (dev != NULL) {
 552                 /* remove sysfs entries: */
 553                 variax_remove_files(0, 0, dev);
 554                 device_remove_file(dev, &dev_attr_model);
 555                 device_remove_file(dev, &dev_attr_volume);
 556                 device_remove_file(dev, &dev_attr_tone);
 557                 device_remove_file(dev, &dev_attr_name);
 558                 device_remove_file(dev, &dev_attr_bank);
 559                 device_remove_file(dev, &dev_attr_dump);
 560                 device_remove_file(dev, &dev_attr_active);
 561 #if CREATE_RAW_FILE
 562                 device_remove_file(dev, &dev_attr_raw);
 563                 device_remove_file(dev, &dev_attr_raw2);
 564 #endif
 565         }
 566
 567         variax_destruct(interface);
 568 }