SAFE public projects git trees. - safe/jmp/linux-2.6/blob - sound/usb/endpoint.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License, or
   5  *   (at your option) any later version.
   6  *
   7  *   This program is distributed in the hope that it will be useful,
   8  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *   GNU General Public License for more details.
  11  *
  12  *   You should have received a copy of the GNU General Public License
  13  *   along with this program; if not, write to the Free Software
  14  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  15  *
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/usb.h>
  21 #include <linux/usb/audio.h>
  22 #include <linux/usb/audio-v2.h>
  23
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26
  27 #include "usbaudio.h"
  28 #include "card.h"
  29 #include "proc.h"
  30 #include "quirks.h"
  31 #include "endpoint.h"
  32 #include "urb.h"
  33 #include "pcm.h"
  34 #include "helper.h"
  35 #include "format.h"
  36
  37 /*
  38  * free a substream
  39  */
  40 static void free_substream(struct snd_usb_substream *subs)
  41 {
  42         struct list_head *p, *n;
  43
  44         if (!subs->num_formats)
  45                 return; /* not initialized */
  46         list_for_each_safe(p, n, &subs->fmt_list) {
  47                 struct audioformat *fp = list_entry(p, struct audioformat, list);
  48                 kfree(fp->rate_table);
  49                 kfree(fp);
  50         }
  51         kfree(subs->rate_list.list);
  52 }
  53
  54
  55 /*
  56  * free a usb stream instance
  57  */
  58 static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
  59 {
  60         free_substream(&stream->substream[0]);
  61         free_substream(&stream->substream[1]);
  62         list_del(&stream->list);
  63         kfree(stream);
  64 }
  65
  66 static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
  67 {
  68         struct snd_usb_stream *stream = pcm->private_data;
  69         if (stream) {
  70                 stream->pcm = NULL;
  71                 snd_usb_audio_stream_free(stream);
  72         }
  73 }
  74
  75
  76 /*
  77  * add this endpoint to the chip instance.
  78  * if a stream with the same endpoint already exists, append to it.
  79  * if not, create a new pcm stream.
  80  */
  81 int snd_usb_add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
  82 {
  83         struct list_head *p;
  84         struct snd_usb_stream *as;
  85         struct snd_usb_substream *subs;
  86         struct snd_pcm *pcm;
  87         int err;
  88
  89         list_for_each(p, &chip->pcm_list) {
  90                 as = list_entry(p, struct snd_usb_stream, list);
  91                 if (as->fmt_type != fp->fmt_type)
  92                         continue;
  93                 subs = &as->substream[stream];
  94                 if (!subs->endpoint)
  95                         continue;
  96                 if (subs->endpoint == fp->endpoint) {
  97                         list_add_tail(&fp->list, &subs->fmt_list);
  98                         subs->num_formats++;
  99                         subs->formats |= fp->formats;
 100                         return 0;
 101                 }
 102         }
 103         /* look for an empty stream */
 104         list_for_each(p, &chip->pcm_list) {
 105                 as = list_entry(p, struct snd_usb_stream, list);
 106                 if (as->fmt_type != fp->fmt_type)
 107                         continue;
 108                 subs = &as->substream[stream];
 109                 if (subs->endpoint)
 110                         continue;
 111                 err = snd_pcm_new_stream(as->pcm, stream, 1);
 112                 if (err < 0)
 113                         return err;
 114                 snd_usb_init_substream(as, stream, fp);
 115                 return 0;
 116         }
 117
 118         /* create a new pcm */
 119         as = kzalloc(sizeof(*as), GFP_KERNEL);
 120         if (!as)
 121                 return -ENOMEM;
 122         as->pcm_index = chip->pcm_devs;
 123         as->chip = chip;
 124         as->fmt_type = fp->fmt_type;
 125         err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
 126                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
 127                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
 128                           &pcm);
 129         if (err < 0) {
 130                 kfree(as);
 131                 return err;
 132         }
 133         as->pcm = pcm;
 134         pcm->private_data = as;
 135         pcm->private_free = snd_usb_audio_pcm_free;
 136         pcm->info_flags = 0;
 137         if (chip->pcm_devs > 0)
 138                 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
 139         else
 140                 strcpy(pcm->name, "USB Audio");
 141
 142         snd_usb_init_substream(as, stream, fp);
 143
 144         list_add(&as->list, &chip->pcm_list);
 145         chip->pcm_devs++;
 146
 147         snd_usb_proc_pcm_format_add(as);
 148
 149         return 0;
 150 }
 151
 152 static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
 153                                          struct usb_host_interface *alts,
 154                                          int protocol, int iface_no)
 155 {
 156         /* parsed with a v1 header here. that's ok as we only look at the
 157          * header first which is the same for both versions */
 158         struct uac_iso_endpoint_descriptor *csep;
 159         struct usb_interface_descriptor *altsd = get_iface_desc(alts);
 160         int attributes = 0;
 161
 162         csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
 163
 164         /* Creamware Noah has this descriptor after the 2nd endpoint */
 165         if (!csep && altsd->bNumEndpoints >= 2)
 166                 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
 167
 168         if (!csep || csep->bLength < 7 ||
 169             csep->bDescriptorSubtype != UAC_EP_GENERAL) {
 170                 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
 171                            " class specific endpoint descriptor\n",
 172                            chip->dev->devnum, iface_no,
 173                            altsd->bAlternateSetting);
 174                 return 0;
 175         }
 176
 177         if (protocol == UAC_VERSION_1) {
 178                 attributes = csep->bmAttributes;
 179         } else {
 180                 struct uac2_iso_endpoint_descriptor *csep2 =
 181                         (struct uac2_iso_endpoint_descriptor *) csep;
 182
 183                 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
 184
 185                 /* emulate the endpoint attributes of a v1 device */
 186                 if (csep2->bmControls & UAC2_CONTROL_PITCH)
 187                         attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
 188         }
 189
 190         return attributes;
 191 }
 192
 193 int snd_usb_parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
 194 {
 195         struct usb_device *dev;
 196         struct usb_interface *iface;
 197         struct usb_host_interface *alts;
 198         struct usb_interface_descriptor *altsd;
 199         int i, altno, err, stream;
 200         int format = 0, num_channels = 0;
 201         struct audioformat *fp = NULL;
 202         int num, protocol;
 203         struct uac_format_type_i_continuous_descriptor *fmt;
 204
 205         dev = chip->dev;
 206
 207         /* parse the interface's altsettings */
 208         iface = usb_ifnum_to_if(dev, iface_no);
 209
 210         num = iface->num_altsetting;
 211
 212         /*
 213          * Dallas DS4201 workaround: It presents 5 altsettings, but the last
 214          * one misses syncpipe, and does not produce any sound.
 215          */
 216         if (chip->usb_id == USB_ID(0x04fa, 0x4201))
 217                 num = 4;
 218
 219         for (i = 0; i < num; i++) {
 220                 alts = &iface->altsetting[i];
 221                 altsd = get_iface_desc(alts);
 222                 protocol = altsd->bInterfaceProtocol;
 223                 /* skip invalid one */
 224                 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
 225                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
 226                     (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
 227                      altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
 228                     altsd->bNumEndpoints < 1 ||
 229                     le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
 230                         continue;
 231                 /* must be isochronous */
 232                 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
 233                     USB_ENDPOINT_XFER_ISOC)
 234                         continue;
 235                 /* check direction */
 236                 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
 237                         SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 238                 altno = altsd->bAlternateSetting;
 239
 240                 if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
 241                         continue;
 242
 243                 /* get audio formats */
 244                 switch (protocol) {
 245                 case UAC_VERSION_1: {
 246                         struct uac_as_header_descriptor_v1 *as =
 247                                 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
 248
 249                         if (!as) {
 250                                 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
 251                                            dev->devnum, iface_no, altno);
 252                                 continue;
 253                         }
 254
 255                         if (as->bLength < sizeof(*as)) {
 256                                 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
 257                                            dev->devnum, iface_no, altno);
 258                                 continue;
 259                         }
 260
 261                         format = le16_to_cpu(as->wFormatTag); /* remember the format value */
 262                         break;
 263                 }
 264
 265                 case UAC_VERSION_2: {
 266                         struct uac_as_header_descriptor_v2 *as =
 267                                 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
 268
 269                         if (!as) {
 270                                 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
 271                                            dev->devnum, iface_no, altno);
 272                                 continue;
 273                         }
 274
 275                         if (as->bLength < sizeof(*as)) {
 276                                 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
 277                                            dev->devnum, iface_no, altno);
 278                                 continue;
 279                         }
 280
 281                         num_channels = as->bNrChannels;
 282                         format = le32_to_cpu(as->bmFormats);
 283
 284                         break;
 285                 }
 286
 287                 default:
 288                         snd_printk(KERN_ERR "%d:%u:%d : unknown interface protocol %04x\n",
 289                                    dev->devnum, iface_no, altno, protocol);
 290                         continue;
 291                 }
 292
 293                 /* get format type */
 294                 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
 295                 if (!fmt) {
 296                         snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n",
 297                                    dev->devnum, iface_no, altno);
 298                         continue;
 299                 }
 300                 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
 301                     ((protocol == UAC_VERSION_2) && (fmt->bLength != 6))) {
 302                         snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
 303                                    dev->devnum, iface_no, altno);
 304                         continue;
 305                 }
 306
 307                 /*
 308                  * Blue Microphones workaround: The last altsetting is identical
 309                  * with the previous one, except for a larger packet size, but
 310                  * is actually a mislabeled two-channel setting; ignore it.
 311                  */
 312                 if (fmt->bNrChannels == 1 &&
 313                     fmt->bSubframeSize == 2 &&
 314                     altno == 2 && num == 3 &&
 315                     fp && fp->altsetting == 1 && fp->channels == 1 &&
 316                     fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
 317                     protocol == UAC_VERSION_1 &&
 318                     le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
 319                                                         fp->maxpacksize * 2)
 320                         continue;
 321
 322                 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
 323                 if (! fp) {
 324                         snd_printk(KERN_ERR "cannot malloc\n");
 325                         return -ENOMEM;
 326                 }
 327
 328                 fp->iface = iface_no;
 329                 fp->altsetting = altno;
 330                 fp->altset_idx = i;
 331                 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 332                 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
 333                 fp->datainterval = snd_usb_parse_datainterval(chip, alts);
 334                 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 335                 /* num_channels is only set for v2 interfaces */
 336                 fp->channels = num_channels;
 337                 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
 338                         fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
 339                                         * (fp->maxpacksize & 0x7ff);
 340                 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
 341
 342                 /* some quirks for attributes here */
 343
 344                 switch (chip->usb_id) {
 345                 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
 346                         /* Optoplay sets the sample rate attribute although
 347                          * it seems not supporting it in fact.
 348                          */
 349                         fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
 350                         break;
 351                 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
 352                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
 353                 case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra 8 */
 354                 case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
 355                         /* doesn't set the sample rate attribute, but supports it */
 356                         fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
 357                         break;
 358                 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
 359                 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
 360                                                 an older model 77d:223) */
 361                 /*
 362                  * plantronics headset and Griffin iMic have set adaptive-in
 363                  * although it's really not...
 364                  */
 365                         fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
 366                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
 367                                 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
 368                         else
 369                                 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
 370                         break;
 371                 }
 372
 373                 /* ok, let's parse further... */
 374                 if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) {
 375                         kfree(fp->rate_table);
 376                         kfree(fp);
 377                         continue;
 378                 }
 379
 380                 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
 381                 err = snd_usb_add_audio_endpoint(chip, stream, fp);
 382                 if (err < 0) {
 383                         kfree(fp->rate_table);
 384                         kfree(fp);
 385                         return err;
 386                 }
 387                 /* try to set the interface... */
 388                 usb_set_interface(chip->dev, iface_no, altno);
 389                 snd_usb_init_pitch(chip, iface_no, alts, fp);
 390                 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
 391         }
 392         return 0;
 393 }
 394