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