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 "pcm.h" 33 #include "helper.h" 34 #include "format.h" 35 #include "clock.h" 36 #include "stream.h" 37 38 /* 39 * free a substream 40 */ 41 static void free_substream(struct snd_usb_substream *subs) 42 { 43 struct list_head *p, *n; 44 45 if (!subs->num_formats) 46 return; /* not initialized */ 47 list_for_each_safe(p, n, &subs->fmt_list) { 48 struct audioformat *fp = list_entry(p, struct audioformat, list); 49 kfree(fp->rate_table); 50 kfree(fp); 51 } 52 kfree(subs->rate_list.list); 53 } 54 55 56 /* 57 * free a usb stream instance 58 */ 59 static void snd_usb_audio_stream_free(struct snd_usb_stream *stream) 60 { 61 free_substream(&stream->substream[0]); 62 free_substream(&stream->substream[1]); 63 list_del(&stream->list); 64 kfree(stream); 65 } 66 67 static void snd_usb_audio_pcm_free(struct snd_pcm *pcm) 68 { 69 struct snd_usb_stream *stream = pcm->private_data; 70 if (stream) { 71 stream->pcm = NULL; 72 snd_usb_audio_stream_free(stream); 73 } 74 } 75 76 77 /* 78 * add this endpoint to the chip instance. 79 * if a stream with the same endpoint already exists, append to it. 80 * if not, create a new pcm stream. 81 */ 82 int snd_usb_add_audio_stream(struct snd_usb_audio *chip, 83 int stream, 84 struct audioformat *fp) 85 { 86 struct list_head *p; 87 struct snd_usb_stream *as; 88 struct snd_usb_substream *subs; 89 struct snd_pcm *pcm; 90 int err; 91 92 list_for_each(p, &chip->pcm_list) { 93 as = list_entry(p, struct snd_usb_stream, list); 94 if (as->fmt_type != fp->fmt_type) 95 continue; 96 subs = &as->substream[stream]; 97 if (!subs->endpoint) 98 continue; 99 if (subs->endpoint == fp->endpoint) { 100 list_add_tail(&fp->list, &subs->fmt_list); 101 subs->num_formats++; 102 subs->formats |= fp->formats; 103 return 0; 104 } 105 } 106 /* look for an empty stream */ 107 list_for_each(p, &chip->pcm_list) { 108 as = list_entry(p, struct snd_usb_stream, list); 109 if (as->fmt_type != fp->fmt_type) 110 continue; 111 subs = &as->substream[stream]; 112 if (subs->endpoint) 113 continue; 114 err = snd_pcm_new_stream(as->pcm, stream, 1); 115 if (err < 0) 116 return err; 117 snd_usb_init_substream(as, stream, fp); 118 return 0; 119 } 120 121 /* create a new pcm */ 122 as = kzalloc(sizeof(*as), GFP_KERNEL); 123 if (!as) 124 return -ENOMEM; 125 as->pcm_index = chip->pcm_devs; 126 as->chip = chip; 127 as->fmt_type = fp->fmt_type; 128 err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs, 129 stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0, 130 stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1, 131 &pcm); 132 if (err < 0) { 133 kfree(as); 134 return err; 135 } 136 as->pcm = pcm; 137 pcm->private_data = as; 138 pcm->private_free = snd_usb_audio_pcm_free; 139 pcm->info_flags = 0; 140 if (chip->pcm_devs > 0) 141 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs); 142 else 143 strcpy(pcm->name, "USB Audio"); 144 145 snd_usb_init_substream(as, stream, fp); 146 147 list_add(&as->list, &chip->pcm_list); 148 chip->pcm_devs++; 149 150 snd_usb_proc_pcm_format_add(as); 151 152 return 0; 153 } 154 155 static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip, 156 struct usb_host_interface *alts, 157 int protocol, int iface_no) 158 { 159 /* parsed with a v1 header here. that's ok as we only look at the 160 * header first which is the same for both versions */ 161 struct uac_iso_endpoint_descriptor *csep; 162 struct usb_interface_descriptor *altsd = get_iface_desc(alts); 163 int attributes = 0; 164 165 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT); 166 167 /* Creamware Noah has this descriptor after the 2nd endpoint */ 168 if (!csep && altsd->bNumEndpoints >= 2) 169 csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT); 170 171 if (!csep || csep->bLength < 7 || 172 csep->bDescriptorSubtype != UAC_EP_GENERAL) { 173 snd_printk(KERN_WARNING "%d:%u:%d : no or invalid" 174 " class specific endpoint descriptor\n", 175 chip->dev->devnum, iface_no, 176 altsd->bAlternateSetting); 177 return 0; 178 } 179 180 if (protocol == UAC_VERSION_1) { 181 attributes = csep->bmAttributes; 182 } else { 183 struct uac2_iso_endpoint_descriptor *csep2 = 184 (struct uac2_iso_endpoint_descriptor *) csep; 185 186 attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX; 187 188 /* emulate the endpoint attributes of a v1 device */ 189 if (csep2->bmControls & UAC2_CONTROL_PITCH) 190 attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL; 191 } 192 193 return attributes; 194 } 195 196 static struct uac2_input_terminal_descriptor * 197 snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface, 198 int terminal_id) 199 { 200 struct uac2_input_terminal_descriptor *term = NULL; 201 202 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, 203 ctrl_iface->extralen, 204 term, UAC_INPUT_TERMINAL))) { 205 if (term->bTerminalID == terminal_id) 206 return term; 207 } 208 209 return NULL; 210 } 211 212 static struct uac2_output_terminal_descriptor * 213 snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface, 214 int terminal_id) 215 { 216 struct uac2_output_terminal_descriptor *term = NULL; 217 218 while ((term = snd_usb_find_csint_desc(ctrl_iface->extra, 219 ctrl_iface->extralen, 220 term, UAC_OUTPUT_TERMINAL))) { 221 if (term->bTerminalID == terminal_id) 222 return term; 223 } 224 225 return NULL; 226 } 227 228 int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no) 229 { 230 struct usb_device *dev; 231 struct usb_interface *iface; 232 struct usb_host_interface *alts; 233 struct usb_interface_descriptor *altsd; 234 int i, altno, err, stream; 235 int format = 0, num_channels = 0; 236 struct audioformat *fp = NULL; 237 int num, protocol, clock = 0; 238 struct uac_format_type_i_continuous_descriptor *fmt; 239 240 dev = chip->dev; 241 242 /* parse the interface's altsettings */ 243 iface = usb_ifnum_to_if(dev, iface_no); 244 245 num = iface->num_altsetting; 246 247 /* 248 * Dallas DS4201 workaround: It presents 5 altsettings, but the last 249 * one misses syncpipe, and does not produce any sound. 250 */ 251 if (chip->usb_id == USB_ID(0x04fa, 0x4201)) 252 num = 4; 253 254 for (i = 0; i < num; i++) { 255 alts = &iface->altsetting[i]; 256 altsd = get_iface_desc(alts); 257 protocol = altsd->bInterfaceProtocol; 258 /* skip invalid one */ 259 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && 260 altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || 261 (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING && 262 altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) || 263 altsd->bNumEndpoints < 1 || 264 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0) 265 continue; 266 /* must be isochronous */ 267 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 268 USB_ENDPOINT_XFER_ISOC) 269 continue; 270 /* check direction */ 271 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ? 272 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; 273 altno = altsd->bAlternateSetting; 274 275 if (snd_usb_apply_interface_quirk(chip, iface_no, altno)) 276 continue; 277 278 /* get audio formats */ 279 switch (protocol) { 280 default: 281 snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n", 282 dev->devnum, iface_no, altno, protocol); 283 protocol = UAC_VERSION_1; 284 /* fall through */ 285 286 case UAC_VERSION_1: { 287 struct uac1_as_header_descriptor *as = 288 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); 289 290 if (!as) { 291 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", 292 dev->devnum, iface_no, altno); 293 continue; 294 } 295 296 if (as->bLength < sizeof(*as)) { 297 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", 298 dev->devnum, iface_no, altno); 299 continue; 300 } 301 302 format = le16_to_cpu(as->wFormatTag); /* remember the format value */ 303 break; 304 } 305 306 case UAC_VERSION_2: { 307 struct uac2_input_terminal_descriptor *input_term; 308 struct uac2_output_terminal_descriptor *output_term; 309 struct uac2_as_header_descriptor *as = 310 snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); 311 312 if (!as) { 313 snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", 314 dev->devnum, iface_no, altno); 315 continue; 316 } 317 318 if (as->bLength < sizeof(*as)) { 319 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", 320 dev->devnum, iface_no, altno); 321 continue; 322 } 323 324 num_channels = as->bNrChannels; 325 format = le32_to_cpu(as->bmFormats); 326 327 /* lookup the terminal associated to this interface 328 * to extract the clock */ 329 input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf, 330 as->bTerminalLink); 331 if (input_term) { 332 clock = input_term->bCSourceID; 333 break; 334 } 335 336 output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf, 337 as->bTerminalLink); 338 if (output_term) { 339 clock = output_term->bCSourceID; 340 break; 341 } 342 343 snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n", 344 dev->devnum, iface_no, altno, as->bTerminalLink); 345 continue; 346 } 347 } 348 349 /* get format type */ 350 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE); 351 if (!fmt) { 352 snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n", 353 dev->devnum, iface_no, altno); 354 continue; 355 } 356 if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) || 357 ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) { 358 snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n", 359 dev->devnum, iface_no, altno); 360 continue; 361 } 362 363 /* 364 * Blue Microphones workaround: The last altsetting is identical 365 * with the previous one, except for a larger packet size, but 366 * is actually a mislabeled two-channel setting; ignore it. 367 */ 368 if (fmt->bNrChannels == 1 && 369 fmt->bSubframeSize == 2 && 370 altno == 2 && num == 3 && 371 fp && fp->altsetting == 1 && fp->channels == 1 && 372 fp->formats == SNDRV_PCM_FMTBIT_S16_LE && 373 protocol == UAC_VERSION_1 && 374 le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 375 fp->maxpacksize * 2) 376 continue; 377 378 fp = kzalloc(sizeof(*fp), GFP_KERNEL); 379 if (! fp) { 380 snd_printk(KERN_ERR "cannot malloc\n"); 381 return -ENOMEM; 382 } 383 384 fp->iface = iface_no; 385 fp->altsetting = altno; 386 fp->altset_idx = i; 387 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; 388 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; 389 fp->datainterval = snd_usb_parse_datainterval(chip, alts); 390 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); 391 /* num_channels is only set for v2 interfaces */ 392 fp->channels = num_channels; 393 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH) 394 fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1) 395 * (fp->maxpacksize & 0x7ff); 396 fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no); 397 fp->clock = clock; 398 399 /* some quirks for attributes here */ 400 401 switch (chip->usb_id) { 402 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */ 403 /* Optoplay sets the sample rate attribute although 404 * it seems not supporting it in fact. 405 */ 406 fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE; 407 break; 408 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */ 409 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ 410 /* doesn't set the sample rate attribute, but supports it */ 411 fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE; 412 break; 413 case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */ 414 case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */ 415 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */ 416 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is 417 an older model 77d:223) */ 418 /* 419 * plantronics headset and Griffin iMic have set adaptive-in 420 * although it's really not... 421 */ 422 fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE; 423 if (stream == SNDRV_PCM_STREAM_PLAYBACK) 424 fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE; 425 else 426 fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC; 427 break; 428 } 429 430 /* ok, let's parse further... */ 431 if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) { 432 kfree(fp->rate_table); 433 kfree(fp); 434 fp = NULL; 435 continue; 436 } 437 438 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint); 439 err = snd_usb_add_audio_stream(chip, stream, fp); 440 if (err < 0) { 441 kfree(fp->rate_table); 442 kfree(fp); 443 return err; 444 } 445 /* try to set the interface... */ 446 usb_set_interface(chip->dev, iface_no, altno); 447 snd_usb_init_pitch(chip, iface_no, alts, fp); 448 snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max); 449 } 450 return 0; 451 } 452 453