sound/usb/card.c

   1 /*
   2  *   (Tentative) USB Audio Driver for ALSA
   3  *
   4  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   5  *
   6  *   Many codes borrowed from audio.c by
   7  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
   8  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
   9  *
  10  *
  11  *   This program is free software; you can redistribute it and/or modify
  12  *   it under the terms of the GNU General Public License as published by
  13  *   the Free Software Foundation; either version 2 of the License, or
  14  *   (at your option) any later version.
  15  *
  16  *   This program is distributed in the hope that it will be useful,
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *   GNU General Public License for more details.
  20  *
  21  *   You should have received a copy of the GNU General Public License
  22  *   along with this program; if not, write to the Free Software
  23  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  24  *
  25  *
  26  *  NOTES:
  27  *
  28  *   - the linked URBs would be preferred but not used so far because of
  29  *     the instability of unlinking.
  30  *   - type II is not supported properly.  there is no device which supports
  31  *     this type *correctly*.  SB extigy looks as if it supports, but it's
  32  *     indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
  33  */
  34
  35
  36 #include <linux/bitops.h>
  37 #include <linux/init.h>
  38 #include <linux/list.h>
  39 #include <linux/slab.h>
  40 #include <linux/string.h>
  41 #include <linux/ctype.h>
  42 #include <linux/usb.h>
  43 #include <linux/moduleparam.h>
  44 #include <linux/mutex.h>
  45 #include <linux/usb/audio.h>
  46 #include <linux/usb/audio-v2.h>
  47 #include <linux/module.h>
  48 #ifdef CONFIG_SWITCH
  49 #include <linux/switch.h>
  50 #endif
  51
  52 #include <sound/control.h>
  53 #include <sound/core.h>
  54 #include <sound/info.h>
  55 #include <sound/pcm.h>
  56 #include <sound/pcm_params.h>
  57 #include <sound/initval.h>
  58
  59 #include "usbaudio.h"
  60 #include "card.h"
  61 #include "midi.h"
  62 #include "mixer.h"
  63 #include "proc.h"
  64 #include "quirks.h"
  65 #include "endpoint.h"
  66 #include "helper.h"
  67 #include "debug.h"
  68 #include "pcm.h"
  69 #include "format.h"
  70 #include "power.h"
  71 #include "stream.h"
  72
  73 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
  74 MODULE_DESCRIPTION("USB Audio");
  75 MODULE_LICENSE("GPL");
  76 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
  77
  78
  79 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  80 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  81 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
  82 /* Vendor/product IDs for this card */
  83 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
  84 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
  85 static int nrpacks = 8;         /* max. number of packets per urb */
  86 static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
  87 static bool ignore_ctl_error;
  88 static bool autoclock = true;
  89
  90 module_param_array(index, int, NULL, 0444);
  91 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
  92 module_param_array(id, charp, NULL, 0444);
  93 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
  94 module_param_array(enable, bool, NULL, 0444);
  95 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
  96 module_param_array(vid, int, NULL, 0444);
  97 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
  98 module_param_array(pid, int, NULL, 0444);
  99 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
 100 module_param(nrpacks, int, 0644);
 101 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
 102 module_param_array(device_setup, int, NULL, 0444);
 103 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
 104 module_param(ignore_ctl_error, bool, 0444);
 105 MODULE_PARM_DESC(ignore_ctl_error,
 106                  "Ignore errors from USB controller for mixer interfaces.");
 107 module_param(autoclock, bool, 0444);
 108 MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes).");
 109
 110 /*
 111  * we keep the snd_usb_audio_t instances by ourselves for merging
 112  * the all interfaces on the same card as one sound device.
 113  */
 114
 115 static DEFINE_MUTEX(register_mutex);
 116 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
 117 static struct usb_driver usb_audio_driver;
 118 #ifdef CONFIG_SND_RK_SOC
 119 #define USB_AUDIO_CARD_NUM      3
 120 struct switch_dev *usb_audio_sdev;
 121 #endif
 122
 123 #ifdef CONFIG_SWITCH
 124 //usb audio card will begin from RBASE_USB_AUDIO_IDX.
 125 #define RBASE_USB_AUDIO_IDX     (3)
 126 #define NO_USBAUDIO_PLAYBACK    (-1)
 127 #define NO_USBAUDIO_CAPTURE     (-1)
 128
 129 struct usb_audio_switch {
 130         int playback_switch_cur_state;
 131         int capture_switch_cur_state;
 132         struct switch_dev sUsbaudio_Playback;
 133         struct switch_dev sUsbaudio_Capture;
 134 };
 135
 136 // state: card*10 + device
 137 static struct usb_audio_switch sUsbaudio_Switch = {
 138         .playback_switch_cur_state = NO_USBAUDIO_PLAYBACK,
 139         .capture_switch_cur_state = NO_USBAUDIO_CAPTURE,
 140         .sUsbaudio_Playback = {
 141                 .name = "usb_audio_playback",
 142                 .state = NO_USBAUDIO_PLAYBACK, //this means no usb audio playback available
 143         },
 144
 145         .sUsbaudio_Capture = {
 146                 .name = "usb_audio_capture",
 147                 .state = NO_USBAUDIO_CAPTURE, //this means no usb audio capture available
 148         },
 149 };
 150 #endif
 151
 152 /*
 153  * disconnect streams
 154  * called from snd_usb_audio_disconnect()
 155  */
 156 static void snd_usb_stream_disconnect(struct list_head *head)
 157 {
 158         int idx;
 159         struct snd_usb_stream *as;
 160         struct snd_usb_substream *subs;
 161
 162         as = list_entry(head, struct snd_usb_stream, list);
 163         for (idx = 0; idx < 2; idx++) {
 164                 subs = &as->substream[idx];
 165                 if (!subs->num_formats)
 166                         continue;
 167                 subs->interface = -1;
 168                 subs->data_endpoint = NULL;
 169                 subs->sync_endpoint = NULL;
 170         }
 171 }
 172
 173 static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
 174 {
 175         struct usb_device *dev = chip->dev;
 176         struct usb_host_interface *alts;
 177         struct usb_interface_descriptor *altsd;
 178         struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
 179
 180         if (!iface) {
 181                 snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
 182                            dev->devnum, ctrlif, interface);
 183                 return -EINVAL;
 184         }
 185
 186         alts = &iface->altsetting[0];
 187         altsd = get_iface_desc(alts);
 188
 189         /*
 190          * Android with both accessory and audio interfaces enabled gets the
 191          * interface numbers wrong.
 192          */
 193         if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) ||
 194              chip->usb_id == USB_ID(0x18d1, 0x2d05)) &&
 195             interface == 0 &&
 196             altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
 197             altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) {
 198                 interface = 2;
 199                 iface = usb_ifnum_to_if(dev, interface);
 200                 if (!iface)
 201                         return -EINVAL;
 202                 alts = &iface->altsetting[0];
 203                 altsd = get_iface_desc(alts);
 204         }
 205
 206         if (usb_interface_claimed(iface)) {
 207                 snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n",
 208                                                 dev->devnum, ctrlif, interface);
 209                 return -EINVAL;
 210         }
 211
 212         if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
 213              altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
 214             altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) {
 215                 int err = snd_usbmidi_create(chip->card, iface,
 216                                              &chip->midi_list, NULL);
 217                 if (err < 0) {
 218                         snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n",
 219                                                 dev->devnum, ctrlif, interface);
 220                         return -EINVAL;
 221                 }
 222                 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
 223
 224                 return 0;
 225         }
 226
 227         if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
 228              altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
 229             altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
 230                 snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n",
 231                                         dev->devnum, ctrlif, interface, altsd->bInterfaceClass);
 232                 /* skip non-supported classes */
 233                 return -EINVAL;
 234         }
 235
 236         if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
 237                 snd_printk(KERN_ERR "low speed audio streaming not supported\n");
 238                 return -EINVAL;
 239         }
 240
 241         if (! snd_usb_parse_audio_interface(chip, interface)) {
 242                 usb_set_interface(dev, interface, 0); /* reset the current interface */
 243                 usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
 244                 return -EINVAL;
 245         }
 246
 247         return 0;
 248 }
 249
 250 /*
 251  * parse audio control descriptor and create pcm/midi streams
 252  */
 253 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 254 {
 255         struct usb_device *dev = chip->dev;
 256         struct usb_host_interface *host_iface;
 257         struct usb_interface_descriptor *altsd;
 258         void *control_header;
 259         int i, protocol;
 260
 261         /* find audiocontrol interface */
 262         host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
 263         control_header = snd_usb_find_csint_desc(host_iface->extra,
 264                                                  host_iface->extralen,
 265                                                  NULL, UAC_HEADER);
 266         altsd = get_iface_desc(host_iface);
 267         protocol = altsd->bInterfaceProtocol;
 268
 269         if (!control_header) {
 270                 snd_printk(KERN_ERR "cannot find UAC_HEADER\n");
 271                 return -EINVAL;
 272         }
 273
 274         switch (protocol) {
 275         default:
 276                 snd_printdd(KERN_WARNING "unknown interface protocol %#02x, assuming v1\n",
 277                             protocol);
 278                 /* fall through */
 279
 280         case UAC_VERSION_1: {
 281                 struct uac1_ac_header_descriptor *h1 = control_header;
 282
 283                 if (!h1->bInCollection) {
 284                         snd_printk(KERN_INFO "skipping empty audio interface (v1)\n");
 285                         return -EINVAL;
 286                 }
 287
 288                 if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
 289                         snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n");
 290                         return -EINVAL;
 291                 }
 292
 293                 for (i = 0; i < h1->bInCollection; i++)
 294                         snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
 295
 296                 break;
 297         }
 298
 299         case UAC_VERSION_2: {
 300                 struct usb_interface_assoc_descriptor *assoc =
 301                         usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
 302
 303                 if (!assoc) {
 304                         /*
 305                          * Firmware writers cannot count to three.  So to find
 306                          * the IAD on the NuForce UDH-100, also check the next
 307                          * interface.
 308                          */
 309                         struct usb_interface *iface =
 310                                 usb_ifnum_to_if(dev, ctrlif + 1);
 311                         if (iface &&
 312                             iface->intf_assoc &&
 313                             iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO &&
 314                             iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2)
 315                                 assoc = iface->intf_assoc;
 316                 }
 317
 318                 if (!assoc) {
 319                         snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n");
 320                         return -EINVAL;
 321                 }
 322
 323                 for (i = 0; i < assoc->bInterfaceCount; i++) {
 324                         int intf = assoc->bFirstInterface + i;
 325
 326                         if (intf != ctrlif)
 327                                 snd_usb_create_stream(chip, ctrlif, intf);
 328                 }
 329
 330                 break;
 331         }
 332         }
 333
 334         return 0;
 335 }
 336
 337 /*
 338  * free the chip instance
 339  *
 340  * here we have to do not much, since pcm and controls are already freed
 341  *
 342  */
 343
 344 static int snd_usb_audio_free(struct snd_usb_audio *chip)
 345 {
 346         mutex_destroy(&chip->mutex);
 347         kfree(chip);
 348         return 0;
 349 }
 350
 351 static int snd_usb_audio_dev_free(struct snd_device *device)
 352 {
 353         struct snd_usb_audio *chip = device->device_data;
 354         return snd_usb_audio_free(chip);
 355 }
 356
 357 static void remove_trailing_spaces(char *str)
 358 {
 359         char *p;
 360
 361         if (!*str)
 362                 return;
 363         for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--)
 364                 *p = 0;
 365 }
 366
 367 /*
 368  * create a chip instance and set its names.
 369  */
 370 static int snd_usb_audio_create(struct usb_device *dev, int idx,
 371                                 const struct snd_usb_audio_quirk *quirk,
 372                                 struct snd_usb_audio **rchip)
 373 {
 374         struct snd_card *card;
 375         struct snd_usb_audio *chip;
 376         int err, len;
 377         char component[14];
 378         static struct snd_device_ops ops = {
 379                 .dev_free =     snd_usb_audio_dev_free,
 380         };
 381
 382         *rchip = NULL;
 383
 384         switch (snd_usb_get_speed(dev)) {
 385         case USB_SPEED_LOW:
 386         case USB_SPEED_FULL:
 387         case USB_SPEED_HIGH:
 388         case USB_SPEED_SUPER:
 389                 break;
 390         default:
 391                 snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
 392                 return -ENXIO;
 393         }
 394 #ifdef CONFIG_SND_RK_SOC
 395         err = snd_card_create(USB_AUDIO_CARD_NUM, id[idx], THIS_MODULE, 0, &card);
 396 #else
 397         err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
 398 #endif
 399         if (err < 0) {
 400                 snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
 401                 return err;
 402         }
 403
 404         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 405         if (! chip) {
 406                 snd_card_free(card);
 407                 return -ENOMEM;
 408         }
 409
 410         mutex_init(&chip->mutex);
 411         init_rwsem(&chip->shutdown_rwsem);
 412         chip->index = idx;
 413         chip->dev = dev;
 414         chip->card = card;
 415         chip->setup = device_setup[idx];
 416         chip->nrpacks = nrpacks;
 417         chip->autoclock = autoclock;
 418         chip->probing = 1;
 419
 420         chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
 421                               le16_to_cpu(dev->descriptor.idProduct));
 422         INIT_LIST_HEAD(&chip->pcm_list);
 423         INIT_LIST_HEAD(&chip->ep_list);
 424         INIT_LIST_HEAD(&chip->midi_list);
 425         INIT_LIST_HEAD(&chip->mixer_list);
 426
 427         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 428                 snd_usb_audio_free(chip);
 429                 snd_card_free(card);
 430                 return err;
 431         }
 432
 433         strcpy(card->driver, "USB-Audio");
 434         sprintf(component, "USB%04x:%04x",
 435                 USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
 436         snd_component_add(card, component);
 437
 438         /* retrieve the device string as shortname */
 439         if (quirk && quirk->product_name && *quirk->product_name) {
 440                 strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
 441         } else {
 442                 if (!dev->descriptor.iProduct ||
 443                     usb_string(dev, dev->descriptor.iProduct,
 444                     card->shortname, sizeof(card->shortname)) <= 0) {
 445                         /* no name available from anywhere, so use ID */
 446                         sprintf(card->shortname, "USB Device %#04x:%#04x",
 447                                 USB_ID_VENDOR(chip->usb_id),
 448                                 USB_ID_PRODUCT(chip->usb_id));
 449                 }
 450         }
 451         remove_trailing_spaces(card->shortname);
 452
 453         /* retrieve the vendor and device strings as longname */
 454         if (quirk && quirk->vendor_name && *quirk->vendor_name) {
 455                 len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
 456         } else {
 457                 if (dev->descriptor.iManufacturer)
 458                         len = usb_string(dev, dev->descriptor.iManufacturer,
 459                                          card->longname, sizeof(card->longname));
 460                 else
 461                         len = 0;
 462                 /* we don't really care if there isn't any vendor string */
 463         }
 464         if (len > 0) {
 465                 remove_trailing_spaces(card->longname);
 466                 if (*card->longname)
 467                         strlcat(card->longname, " ", sizeof(card->longname));
 468         }
 469
 470         strlcat(card->longname, card->shortname, sizeof(card->longname));
 471
 472         len = strlcat(card->longname, " at ", sizeof(card->longname));
 473
 474         if (len < sizeof(card->longname))
 475                 usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
 476
 477         switch (snd_usb_get_speed(dev)) {
 478         case USB_SPEED_LOW:
 479                 strlcat(card->longname, ", low speed", sizeof(card->longname));
 480                 break;
 481         case USB_SPEED_FULL:
 482                 strlcat(card->longname, ", full speed", sizeof(card->longname));
 483                 break;
 484         case USB_SPEED_HIGH:
 485                 strlcat(card->longname, ", high speed", sizeof(card->longname));
 486                 break;
 487         case USB_SPEED_SUPER:
 488                 strlcat(card->longname, ", super speed", sizeof(card->longname));
 489                 break;
 490         default:
 491                 break;
 492         }
 493
 494         snd_usb_audio_create_proc(chip);
 495
 496         *rchip = chip;
 497         return 0;
 498 }
 499
 500 #ifdef CONFIG_SWITCH
 501 static int usb_audio_card_switch_state_update(struct snd_card *card, bool force){
 502         struct snd_device *dev;
 503     struct snd_pcm *pcm;
 504     struct snd_pcm_str *pstr;
 505
 506         if (snd_BUG_ON(!card))
 507                 return -EINVAL;
 508         //we use the latest devices
 509         list_for_each_entry(dev, &card->devices, list) {
 510                 if (dev->type == SNDRV_DEV_PCM && dev->state == SNDRV_DEV_REGISTERED) {
 511                         pcm = (struct snd_pcm*)dev->device_data;
 512                         if (NULL != pcm) {
 513                                 //playback available?
 514                                 pstr = &pcm->streams[SNDRV_PCM_STREAM_PLAYBACK];
 515                                 snd_printdd(KERN_INFO "playback substream_count: 0x%x\n", pstr->substream_count);
 516                                 if (pstr->substream_count > 0) {
 517                                         sUsbaudio_Switch.playback_switch_cur_state = card->number * 10;
 518                                 }
 519                                 //capture available?
 520                                 pstr = &pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
 521                                 snd_printdd(KERN_INFO "capture substream_count: 0x%x\n", pstr->substream_count);
 522                                 if (pstr->substream_count > 0) {
 523                                         sUsbaudio_Switch.capture_switch_cur_state = card->number * 10;
 524                                 }
 525                         }
 526                 }
 527         }
 528         if (force) {
 529                 switch_set_state(&sUsbaudio_Switch.sUsbaudio_Playback, sUsbaudio_Switch.playback_switch_cur_state);
 530                 switch_set_state(&sUsbaudio_Switch.sUsbaudio_Capture, sUsbaudio_Switch.capture_switch_cur_state);
 531         }
 532         return 0;
 533
 534 }
 535
 536 static void usb_audio_switch_state_update_all(void)
 537 {
 538         int index = 0;
 539         struct snd_card *card;
 540
 541         sUsbaudio_Switch.playback_switch_cur_state = NO_USBAUDIO_PLAYBACK;
 542         sUsbaudio_Switch.capture_switch_cur_state = NO_USBAUDIO_CAPTURE;
 543
 544         for (index = 0; index < SNDRV_CARDS; ++index) {
 545                 if (NULL != usb_chip[index]) {
 546                         card = usb_chip[index]->card;
 547                         usb_audio_card_switch_state_update(card, false);
 548                 }
 549         }
 550
 551         switch_set_state(&sUsbaudio_Switch.sUsbaudio_Playback,
 552                          sUsbaudio_Switch.playback_switch_cur_state);
 553         switch_set_state(&sUsbaudio_Switch.sUsbaudio_Capture,
 554                          sUsbaudio_Switch.capture_switch_cur_state);
 555 }
 556 #endif
 557
 558
 559 /*
 560  * probe the active usb device
 561  *
 562  * note that this can be called multiple times per a device, when it
 563  * includes multiple audio control interfaces.
 564  *
 565  * thus we check the usb device pointer and creates the card instance
 566  * only at the first time.  the successive calls of this function will
 567  * append the pcm interface to the corresponding card.
 568  */
 569 static struct snd_usb_audio *
 570 snd_usb_audio_probe(struct usb_device *dev,
 571                     struct usb_interface *intf,
 572                     const struct usb_device_id *usb_id)
 573 {
 574         const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
 575         int i, err;
 576         struct snd_usb_audio *chip;
 577         struct usb_host_interface *alts;
 578         int ifnum;
 579         u32 id;
 580
 581         alts = &intf->altsetting[0];
 582         ifnum = get_iface_desc(alts)->bInterfaceNumber;
 583         id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
 584                     le16_to_cpu(dev->descriptor.idProduct));
 585         if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
 586                 goto __err_val;
 587
 588         if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0)
 589                 goto __err_val;
 590
 591         /*
 592          * found a config.  now register to ALSA
 593          */
 594
 595         /* check whether it's already registered */
 596         chip = NULL;
 597         mutex_lock(&register_mutex);
 598         for (i = 0; i < SNDRV_CARDS; i++) {
 599                 if (usb_chip[i] && usb_chip[i]->dev == dev) {
 600                         if (usb_chip[i]->shutdown) {
 601                                 snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
 602                                 goto __error;
 603                         }
 604                         chip = usb_chip[i];
 605                         chip->probing = 1;
 606                         break;
 607                 }
 608         }
 609         if (! chip) {
 610                 /* it's a fresh one.
 611                  * now look for an empty slot and create a new card instance
 612                  */
 613                 // use RBASE_USB_AUDIO_IDX instead of zero, modify by zxg.
 614                 for (i = 0; i < SNDRV_CARDS; i++)
 615                         if (enable[i] && ! usb_chip[i] &&
 616                             (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
 617                             (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
 618                                 if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
 619                                         goto __error;
 620                                 }
 621                                 snd_card_set_dev(chip->card, &intf->dev);
 622                                 chip->pm_intf = intf;
 623                                 break;
 624                         }
 625                 if (!chip) {
 626                         printk(KERN_ERR "no available usb audio device\n");
 627                         goto __error;
 628                 }
 629         }
 630
 631         /*
 632          * For devices with more than one control interface, we assume the
 633          * first contains the audio controls. We might need a more specific
 634          * check here in the future.
 635          */
 636         if (!chip->ctrl_intf)
 637                 chip->ctrl_intf = alts;
 638
 639         chip->txfr_quirk = 0;
 640         err = 1; /* continue */
 641         if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
 642                 /* need some special handlings */
 643                 if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk)) < 0)
 644                         goto __error;
 645         }
 646
 647         if (err > 0) {
 648                 /* create normal USB audio interfaces */
 649                 if (snd_usb_create_streams(chip, ifnum) < 0 ||
 650                     snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
 651                         goto __error;
 652                 }
 653         }
 654
 655         /* we are allowed to call snd_card_register() many times */
 656         if (snd_card_register(chip->card) < 0) {
 657                 goto __error;
 658         }
 659 #ifdef CONFIG_SWITCH
 660         if (usb_audio_card_switch_state_update(chip->card, true) < 0) {
 661                 printk(KERN_ERR "usb_audio_card_switch_state_update failed!!!\n");
 662         goto __error;
 663         }
 664 #endif
 665         usb_chip[chip->index] = chip;
 666         chip->num_interfaces++;
 667         chip->probing = 0;
 668         mutex_unlock(&register_mutex);
 669         return chip;
 670
 671  __error:
 672         if (chip) {
 673                 if (!chip->num_interfaces)
 674                         snd_card_free(chip->card);
 675                 chip->probing = 0;
 676         }
 677         mutex_unlock(&register_mutex);
 678  __err_val:
 679         return NULL;
 680 }
 681
 682 /*
 683  * we need to take care of counter, since disconnection can be called also
 684  * many times as well as usb_audio_probe().
 685  */
 686 static void snd_usb_audio_disconnect(struct usb_device *dev,
 687                                      struct snd_usb_audio *chip)
 688 {
 689         struct snd_card *card;
 690         struct list_head *p, *n;
 691
 692         if (chip == (void *)-1L)
 693                 return;
 694
 695         card = chip->card;
 696         down_write(&chip->shutdown_rwsem);
 697         chip->shutdown = 1;
 698         up_write(&chip->shutdown_rwsem);
 699
 700         mutex_lock(&register_mutex);
 701         chip->num_interfaces--;
 702         if (chip->num_interfaces <= 0) {
 703                 snd_card_disconnect(card);
 704                 /* release the pcm resources */
 705                 list_for_each(p, &chip->pcm_list) {
 706                         snd_usb_stream_disconnect(p);
 707                 }
 708                 /* release the endpoint resources */
 709                 list_for_each_safe(p, n, &chip->ep_list) {
 710                         snd_usb_endpoint_free(p);
 711                 }
 712                 /* release the midi resources */
 713                 list_for_each(p, &chip->midi_list) {
 714                         snd_usbmidi_disconnect(p);
 715                 }
 716                 /* release mixer resources */
 717                 list_for_each(p, &chip->mixer_list) {
 718                         snd_usb_mixer_disconnect(p);
 719                 }
 720                 usb_chip[chip->index] = NULL;
 721                 mutex_unlock(&register_mutex);
 722                 snd_card_free_when_closed(card);
 723         } else {
 724                 mutex_unlock(&register_mutex);
 725         }
 726 #ifdef CONFIG_SWITCH
 727         usb_audio_switch_state_update_all();
 728 #endif
 729 }
 730
 731 /*
 732  * new 2.5 USB kernel API
 733  */
 734 static int usb_audio_probe(struct usb_interface *intf,
 735                            const struct usb_device_id *id)
 736 {
 737         struct snd_usb_audio *chip;
 738         chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
 739         if (chip) {
 740                 usb_set_intfdata(intf, chip);
 741 #ifdef CONFIG_SND_RK_SOC
 742                 switch_set_state(usb_audio_sdev, 1);
 743 #endif
 744                 return 0;
 745         } else
 746                 return -EIO;
 747 }
 748
 749 static void usb_audio_disconnect(struct usb_interface *intf)
 750 {
 751 #ifdef CONFIG_SND_RK_SOC
 752         switch_set_state(usb_audio_sdev, 0);
 753 #endif
 754         snd_usb_audio_disconnect(interface_to_usbdev(intf),
 755                                  usb_get_intfdata(intf));
 756 }
 757
 758 #ifdef CONFIG_PM
 759
 760 int snd_usb_autoresume(struct snd_usb_audio *chip)
 761 {
 762         int err = -ENODEV;
 763
 764         down_read(&chip->shutdown_rwsem);
 765         if (chip->probing)
 766                 err = 0;
 767         else if (!chip->shutdown)
 768                 err = usb_autopm_get_interface(chip->pm_intf);
 769         up_read(&chip->shutdown_rwsem);
 770
 771         return err;
 772 }
 773
 774 void snd_usb_autosuspend(struct snd_usb_audio *chip)
 775 {
 776         down_read(&chip->shutdown_rwsem);
 777         if (!chip->shutdown && !chip->probing)
 778                 usb_autopm_put_interface(chip->pm_intf);
 779         up_read(&chip->shutdown_rwsem);
 780 }
 781
 782 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
 783 {
 784         struct snd_usb_audio *chip = usb_get_intfdata(intf);
 785         struct snd_usb_stream *as;
 786         struct usb_mixer_interface *mixer;
 787
 788         if (chip == (void *)-1L)
 789                 return 0;
 790
 791         if (!PMSG_IS_AUTO(message)) {
 792                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
 793                 if (!chip->num_suspended_intf++) {
 794                         list_for_each_entry(as, &chip->pcm_list, list) {
 795                                 snd_pcm_suspend_all(as->pcm);
 796                                 as->substream[0].need_setup_ep =
 797                                         as->substream[1].need_setup_ep = true;
 798                         }
 799                 }
 800         } else {
 801                 /*
 802                  * otherwise we keep the rest of the system in the dark
 803                  * to keep this transparent
 804                  */
 805                 if (!chip->num_suspended_intf++)
 806                         chip->autosuspended = 1;
 807         }
 808
 809         list_for_each_entry(mixer, &chip->mixer_list, list)
 810                 snd_usb_mixer_inactivate(mixer);
 811
 812         return 0;
 813 }
 814
 815 static int usb_audio_resume(struct usb_interface *intf)
 816 {
 817         struct snd_usb_audio *chip = usb_get_intfdata(intf);
 818         struct usb_mixer_interface *mixer;
 819         int err = 0;
 820
 821         if (chip == (void *)-1L)
 822                 return 0;
 823         if (--chip->num_suspended_intf)
 824                 return 0;
 825         /*
 826          * ALSA leaves material resumption to user space
 827          * we just notify and restart the mixers
 828          */
 829         list_for_each_entry(mixer, &chip->mixer_list, list) {
 830                 err = snd_usb_mixer_activate(mixer);
 831                 if (err < 0)
 832                         goto err_out;
 833         }
 834
 835         if (!chip->autosuspended)
 836                 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
 837         chip->autosuspended = 0;
 838
 839 err_out:
 840         return err;
 841 }
 842 #else
 843 #define usb_audio_suspend       NULL
 844 #define usb_audio_resume        NULL
 845 #endif          /* CONFIG_PM */
 846
 847 static struct usb_device_id usb_audio_ids [] = {
 848 #include "quirks-table.h"
 849     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
 850       .bInterfaceClass = USB_CLASS_AUDIO,
 851       .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL },
 852     { }                                         /* Terminating entry */
 853 };
 854 MODULE_DEVICE_TABLE(usb, usb_audio_ids);
 855
 856 /*
 857  * entry point for linux usb interface
 858  */
 859
 860 static struct usb_driver usb_audio_driver = {
 861         .name =         "snd-usb-audio",
 862         .probe =        usb_audio_probe,
 863         .disconnect =   usb_audio_disconnect,
 864         .suspend =      usb_audio_suspend,
 865         .resume =       usb_audio_resume,
 866         .id_table =     usb_audio_ids,
 867         .supports_autosuspend = 1,
 868 };
 869
 870 static int __init snd_usb_audio_init(void)
 871 {
 872         int ret;
 873 #ifdef CONFIG_SWITCH
 874         int i;
 875         ret = switch_dev_register(&sUsbaudio_Switch.sUsbaudio_Playback);
 876         if (ret)
 877                 goto err;
 878         ret = switch_dev_register(&sUsbaudio_Switch.sUsbaudio_Capture);
 879         if (ret)
 880                 goto err_drv;
 881
 882         switch_set_state(&sUsbaudio_Switch.sUsbaudio_Playback, NO_USBAUDIO_PLAYBACK);
 883         switch_set_state(&sUsbaudio_Switch.sUsbaudio_Capture, NO_USBAUDIO_CAPTURE);
 884 #endif
 885
 886         if (nrpacks < 1 || nrpacks > MAX_PACKS) {
 887                 printk(KERN_WARNING "invalid nrpacks value.\n");
 888                 return -EINVAL;
 889         }
 890 #ifdef CONFIG_SND_RK_SOC
 891         usb_audio_sdev = kzalloc(sizeof(usb_audio_sdev), GFP_KERNEL);
 892         usb_audio_sdev->name = "usb_audio";
 893         switch_dev_register(usb_audio_sdev);
 894         if (!usb_audio_sdev) {
 895                 printk(KERN_WARNING "usb-audio kmalloc fail!");
 896                 return -ENOMEM;
 897         }
 898 #endif
 899
 900     //re initial array index for rebasing usb audio cards create, modify by zxg.
 901     for(i=0; i<SNDRV_CARDS; ++i){
 902         index[i] = i;
 903     }
 904
 905         return usb_register(&usb_audio_driver);
 906
 907 err_drv:
 908 #ifdef CONFIG_SWITCH
 909         switch_dev_unregister(&sUsbaudio_Switch.sUsbaudio_Playback);
 910 #endif
 911 err:
 912     return ret;
 913
 914 }
 915
 916 static void __exit snd_usb_audio_cleanup(void)
 917 {
 918         usb_deregister(&usb_audio_driver);
 919 #ifdef CONFIG_SND_RK_SOC
 920         kfree(usb_audio_sdev);
 921 #endif
 922         switch_dev_unregister(&sUsbaudio_Switch.sUsbaudio_Capture);
 923         switch_dev_unregister(&sUsbaudio_Switch.sUsbaudio_Playback);
 924 }
 925
 926 /*module_init(snd_usb_audio_init);*/
 927 /* use late initcall_sync instead of module_init,
 928  * make sure that usbaudio probe after board codec.
 929  * added by zxg@rock-chips.com
 930  */
 931 late_initcall_sync(snd_usb_audio_init);
 932 module_exit(snd_usb_audio_cleanup);