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