Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
[sfrench/cifs-2.6.git] / sound / usb / usbaudio.c
1 /*
2  *   (Tentative) USB Audio Driver for ALSA
3  *
4  *   Main and PCM part
5  *
6  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
7  *
8  *   Many codes borrowed from audio.c by
9  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
10  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
11  *
12  *
13  *   This program is free software; you can redistribute it and/or modify
14  *   it under the terms of the GNU General Public License as published by
15  *   the Free Software Foundation; either version 2 of the License, or
16  *   (at your option) any later version.
17  *
18  *   This program is distributed in the hope that it will be useful,
19  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
20  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  *   GNU General Public License for more details.
22  *
23  *   You should have received a copy of the GNU General Public License
24  *   along with this program; if not, write to the Free Software
25  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
26  *
27  *
28  *  NOTES:
29  *
30  *   - async unlink should be used for avoiding the sleep inside lock.
31  *     2.4.22 usb-uhci seems buggy for async unlinking and results in
32  *     oops.  in such a cse, pass async_unlink=0 option.
33  *   - the linked URBs would be preferred but not used so far because of
34  *     the instability of unlinking.
35  *   - type II is not supported properly.  there is no device which supports
36  *     this type *correctly*.  SB extigy looks as if it supports, but it's
37  *     indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
38  */
39
40
41 #include <linux/bitops.h>
42 #include <linux/init.h>
43 #include <linux/list.h>
44 #include <linux/slab.h>
45 #include <linux/string.h>
46 #include <linux/usb.h>
47 #include <linux/vmalloc.h>
48 #include <linux/moduleparam.h>
49 #include <linux/mutex.h>
50 #include <sound/core.h>
51 #include <sound/info.h>
52 #include <sound/pcm.h>
53 #include <sound/pcm_params.h>
54 #include <sound/initval.h>
55
56 #include "usbaudio.h"
57
58
59 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
60 MODULE_DESCRIPTION("USB Audio");
61 MODULE_LICENSE("GPL");
62 MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
63
64
65 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
66 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
67 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
68 static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
69 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
70 static int nrpacks = 8;         /* max. number of packets per urb */
71 static int async_unlink = 1;
72 static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
73
74 module_param_array(index, int, NULL, 0444);
75 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
76 module_param_array(id, charp, NULL, 0444);
77 MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
78 module_param_array(enable, bool, NULL, 0444);
79 MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
80 module_param_array(vid, int, NULL, 0444);
81 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
82 module_param_array(pid, int, NULL, 0444);
83 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
84 module_param(nrpacks, int, 0644);
85 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
86 module_param(async_unlink, bool, 0444);
87 MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
88 module_param_array(device_setup, int, NULL, 0444);
89 MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
90
91
92 /*
93  * debug the h/w constraints
94  */
95 /* #define HW_CONST_DEBUG */
96
97
98 /*
99  *
100  */
101
102 #define MAX_PACKS       20
103 #define MAX_PACKS_HS    (MAX_PACKS * 8) /* in high speed mode */
104 #define MAX_URBS        8
105 #define SYNC_URBS       4       /* always four urbs for sync */
106 #define MIN_PACKS_URB   1       /* minimum 1 packet per urb */
107
108 struct audioformat {
109         struct list_head list;
110         snd_pcm_format_t format;        /* format type */
111         unsigned int channels;          /* # channels */
112         unsigned int fmt_type;          /* USB audio format type (1-3) */
113         unsigned int frame_size;        /* samples per frame for non-audio */
114         int iface;                      /* interface number */
115         unsigned char altsetting;       /* corresponding alternate setting */
116         unsigned char altset_idx;       /* array index of altenate setting */
117         unsigned char attributes;       /* corresponding attributes of cs endpoint */
118         unsigned char endpoint;         /* endpoint */
119         unsigned char ep_attr;          /* endpoint attributes */
120         unsigned int maxpacksize;       /* max. packet size */
121         unsigned int rates;             /* rate bitmasks */
122         unsigned int rate_min, rate_max;        /* min/max rates */
123         unsigned int nr_rates;          /* number of rate table entries */
124         unsigned int *rate_table;       /* rate table */
125 };
126
127 struct snd_usb_substream;
128
129 struct snd_urb_ctx {
130         struct urb *urb;
131         unsigned int buffer_size;       /* size of data buffer, if data URB */
132         struct snd_usb_substream *subs;
133         int index;      /* index for urb array */
134         int packets;    /* number of packets per urb */
135 };
136
137 struct snd_urb_ops {
138         int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
139         int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
140         int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
141         int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
142 };
143
144 struct snd_usb_substream {
145         struct snd_usb_stream *stream;
146         struct usb_device *dev;
147         struct snd_pcm_substream *pcm_substream;
148         int direction;  /* playback or capture */
149         int interface;  /* current interface */
150         int endpoint;   /* assigned endpoint */
151         struct audioformat *cur_audiofmt;       /* current audioformat pointer (for hw_params callback) */
152         unsigned int cur_rate;          /* current rate (for hw_params callback) */
153         unsigned int period_bytes;      /* current period bytes (for hw_params callback) */
154         unsigned int format;     /* USB data format */
155         unsigned int datapipe;   /* the data i/o pipe */
156         unsigned int syncpipe;   /* 1 - async out or adaptive in */
157         unsigned int datainterval;      /* log_2 of data packet interval */
158         unsigned int syncinterval;  /* P for adaptive mode, 0 otherwise */
159         unsigned int freqn;      /* nominal sampling rate in fs/fps in Q16.16 format */
160         unsigned int freqm;      /* momentary sampling rate in fs/fps in Q16.16 format */
161         unsigned int freqmax;    /* maximum sampling rate, used for buffer management */
162         unsigned int phase;      /* phase accumulator */
163         unsigned int maxpacksize;       /* max packet size in bytes */
164         unsigned int maxframesize;      /* max packet size in frames */
165         unsigned int curpacksize;       /* current packet size in bytes (for capture) */
166         unsigned int curframesize;      /* current packet size in frames (for capture) */
167         unsigned int fill_max: 1;       /* fill max packet size always */
168         unsigned int fmt_type;          /* USB audio format type (1-3) */
169         unsigned int packs_per_ms;      /* packets per millisecond (for playback) */
170
171         unsigned int running: 1;        /* running status */
172
173         unsigned int hwptr_done;                        /* processed frame position in the buffer */
174         unsigned int transfer_done;             /* processed frames since last period update */
175         unsigned long active_mask;      /* bitmask of active urbs */
176         unsigned long unlink_mask;      /* bitmask of unlinked urbs */
177
178         unsigned int nurbs;                     /* # urbs */
179         struct snd_urb_ctx dataurb[MAX_URBS];   /* data urb table */
180         struct snd_urb_ctx syncurb[SYNC_URBS];  /* sync urb table */
181         char *syncbuf;                          /* sync buffer for all sync URBs */
182         dma_addr_t sync_dma;                    /* DMA address of syncbuf */
183
184         u64 formats;                    /* format bitmasks (all or'ed) */
185         unsigned int num_formats;               /* number of supported audio formats (list) */
186         struct list_head fmt_list;      /* format list */
187         struct snd_pcm_hw_constraint_list rate_list;    /* limited rates */
188         spinlock_t lock;
189
190         struct snd_urb_ops ops;         /* callbacks (must be filled at init) */
191 };
192
193
194 struct snd_usb_stream {
195         struct snd_usb_audio *chip;
196         struct snd_pcm *pcm;
197         int pcm_index;
198         unsigned int fmt_type;          /* USB audio format type (1-3) */
199         struct snd_usb_substream substream[2];
200         struct list_head list;
201 };
202
203
204 /*
205  * we keep the snd_usb_audio_t instances by ourselves for merging
206  * the all interfaces on the same card as one sound device.
207  */
208
209 static DEFINE_MUTEX(register_mutex);
210 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
211
212
213 /*
214  * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
215  * this will overflow at approx 524 kHz
216  */
217 static inline unsigned get_usb_full_speed_rate(unsigned int rate)
218 {
219         return ((rate << 13) + 62) / 125;
220 }
221
222 /*
223  * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
224  * this will overflow at approx 4 MHz
225  */
226 static inline unsigned get_usb_high_speed_rate(unsigned int rate)
227 {
228         return ((rate << 10) + 62) / 125;
229 }
230
231 /* convert our full speed USB rate into sampling rate in Hz */
232 static inline unsigned get_full_speed_hz(unsigned int usb_rate)
233 {
234         return (usb_rate * 125 + (1 << 12)) >> 13;
235 }
236
237 /* convert our high speed USB rate into sampling rate in Hz */
238 static inline unsigned get_high_speed_hz(unsigned int usb_rate)
239 {
240         return (usb_rate * 125 + (1 << 9)) >> 10;
241 }
242
243
244 /*
245  * prepare urb for full speed capture sync pipe
246  *
247  * fill the length and offset of each urb descriptor.
248  * the fixed 10.14 frequency is passed through the pipe.
249  */
250 static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
251                                     struct snd_pcm_runtime *runtime,
252                                     struct urb *urb)
253 {
254         unsigned char *cp = urb->transfer_buffer;
255         struct snd_urb_ctx *ctx = urb->context;
256
257         urb->dev = ctx->subs->dev; /* we need to set this at each time */
258         urb->iso_frame_desc[0].length = 3;
259         urb->iso_frame_desc[0].offset = 0;
260         cp[0] = subs->freqn >> 2;
261         cp[1] = subs->freqn >> 10;
262         cp[2] = subs->freqn >> 18;
263         return 0;
264 }
265
266 /*
267  * prepare urb for high speed capture sync pipe
268  *
269  * fill the length and offset of each urb descriptor.
270  * the fixed 12.13 frequency is passed as 16.16 through the pipe.
271  */
272 static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
273                                        struct snd_pcm_runtime *runtime,
274                                        struct urb *urb)
275 {
276         unsigned char *cp = urb->transfer_buffer;
277         struct snd_urb_ctx *ctx = urb->context;
278
279         urb->dev = ctx->subs->dev; /* we need to set this at each time */
280         urb->iso_frame_desc[0].length = 4;
281         urb->iso_frame_desc[0].offset = 0;
282         cp[0] = subs->freqn;
283         cp[1] = subs->freqn >> 8;
284         cp[2] = subs->freqn >> 16;
285         cp[3] = subs->freqn >> 24;
286         return 0;
287 }
288
289 /*
290  * process after capture sync complete
291  * - nothing to do
292  */
293 static int retire_capture_sync_urb(struct snd_usb_substream *subs,
294                                    struct snd_pcm_runtime *runtime,
295                                    struct urb *urb)
296 {
297         return 0;
298 }
299
300 /*
301  * prepare urb for capture data pipe
302  *
303  * fill the offset and length of each descriptor.
304  *
305  * we use a temporary buffer to write the captured data.
306  * since the length of written data is determined by host, we cannot
307  * write onto the pcm buffer directly...  the data is thus copied
308  * later at complete callback to the global buffer.
309  */
310 static int prepare_capture_urb(struct snd_usb_substream *subs,
311                                struct snd_pcm_runtime *runtime,
312                                struct urb *urb)
313 {
314         int i, offs;
315         struct snd_urb_ctx *ctx = urb->context;
316
317         offs = 0;
318         urb->dev = ctx->subs->dev; /* we need to set this at each time */
319         for (i = 0; i < ctx->packets; i++) {
320                 urb->iso_frame_desc[i].offset = offs;
321                 urb->iso_frame_desc[i].length = subs->curpacksize;
322                 offs += subs->curpacksize;
323         }
324         urb->transfer_buffer_length = offs;
325         urb->number_of_packets = ctx->packets;
326         return 0;
327 }
328
329 /*
330  * process after capture complete
331  *
332  * copy the data from each desctiptor to the pcm buffer, and
333  * update the current position.
334  */
335 static int retire_capture_urb(struct snd_usb_substream *subs,
336                               struct snd_pcm_runtime *runtime,
337                               struct urb *urb)
338 {
339         unsigned long flags;
340         unsigned char *cp;
341         int i;
342         unsigned int stride, len, oldptr;
343         int period_elapsed = 0;
344
345         stride = runtime->frame_bits >> 3;
346
347         for (i = 0; i < urb->number_of_packets; i++) {
348                 cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
349                 if (urb->iso_frame_desc[i].status) {
350                         snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
351                         // continue;
352                 }
353                 len = urb->iso_frame_desc[i].actual_length / stride;
354                 if (! len)
355                         continue;
356                 /* update the current pointer */
357                 spin_lock_irqsave(&subs->lock, flags);
358                 oldptr = subs->hwptr_done;
359                 subs->hwptr_done += len;
360                 if (subs->hwptr_done >= runtime->buffer_size)
361                         subs->hwptr_done -= runtime->buffer_size;
362                 subs->transfer_done += len;
363                 if (subs->transfer_done >= runtime->period_size) {
364                         subs->transfer_done -= runtime->period_size;
365                         period_elapsed = 1;
366                 }
367                 spin_unlock_irqrestore(&subs->lock, flags);
368                 /* copy a data chunk */
369                 if (oldptr + len > runtime->buffer_size) {
370                         unsigned int cnt = runtime->buffer_size - oldptr;
371                         unsigned int blen = cnt * stride;
372                         memcpy(runtime->dma_area + oldptr * stride, cp, blen);
373                         memcpy(runtime->dma_area, cp + blen, len * stride - blen);
374                 } else {
375                         memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
376                 }
377         }
378         if (period_elapsed)
379                 snd_pcm_period_elapsed(subs->pcm_substream);
380         return 0;
381 }
382
383 /*
384  * Process after capture complete when paused.  Nothing to do.
385  */
386 static int retire_paused_capture_urb(struct snd_usb_substream *subs,
387                                      struct snd_pcm_runtime *runtime,
388                                      struct urb *urb)
389 {
390         return 0;
391 }
392
393
394 /*
395  * prepare urb for full speed playback sync pipe
396  *
397  * set up the offset and length to receive the current frequency.
398  */
399
400 static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
401                                      struct snd_pcm_runtime *runtime,
402                                      struct urb *urb)
403 {
404         struct snd_urb_ctx *ctx = urb->context;
405
406         urb->dev = ctx->subs->dev; /* we need to set this at each time */
407         urb->iso_frame_desc[0].length = 3;
408         urb->iso_frame_desc[0].offset = 0;
409         return 0;
410 }
411
412 /*
413  * prepare urb for high speed playback sync pipe
414  *
415  * set up the offset and length to receive the current frequency.
416  */
417
418 static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
419                                         struct snd_pcm_runtime *runtime,
420                                         struct urb *urb)
421 {
422         struct snd_urb_ctx *ctx = urb->context;
423
424         urb->dev = ctx->subs->dev; /* we need to set this at each time */
425         urb->iso_frame_desc[0].length = 4;
426         urb->iso_frame_desc[0].offset = 0;
427         return 0;
428 }
429
430 /*
431  * process after full speed playback sync complete
432  *
433  * retrieve the current 10.14 frequency from pipe, and set it.
434  * the value is referred in prepare_playback_urb().
435  */
436 static int retire_playback_sync_urb(struct snd_usb_substream *subs,
437                                     struct snd_pcm_runtime *runtime,
438                                     struct urb *urb)
439 {
440         unsigned int f;
441         unsigned long flags;
442
443         if (urb->iso_frame_desc[0].status == 0 &&
444             urb->iso_frame_desc[0].actual_length == 3) {
445                 f = combine_triple((u8*)urb->transfer_buffer) << 2;
446                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
447                         spin_lock_irqsave(&subs->lock, flags);
448                         subs->freqm = f;
449                         spin_unlock_irqrestore(&subs->lock, flags);
450                 }
451         }
452
453         return 0;
454 }
455
456 /*
457  * process after high speed playback sync complete
458  *
459  * retrieve the current 12.13 frequency from pipe, and set it.
460  * the value is referred in prepare_playback_urb().
461  */
462 static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
463                                        struct snd_pcm_runtime *runtime,
464                                        struct urb *urb)
465 {
466         unsigned int f;
467         unsigned long flags;
468
469         if (urb->iso_frame_desc[0].status == 0 &&
470             urb->iso_frame_desc[0].actual_length == 4) {
471                 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
472                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
473                         spin_lock_irqsave(&subs->lock, flags);
474                         subs->freqm = f;
475                         spin_unlock_irqrestore(&subs->lock, flags);
476                 }
477         }
478
479         return 0;
480 }
481
482 /*
483  * process after E-Mu 0202/0404 high speed playback sync complete
484  *
485  * These devices return the number of samples per packet instead of the number
486  * of samples per microframe.
487  */
488 static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs,
489                                            struct snd_pcm_runtime *runtime,
490                                            struct urb *urb)
491 {
492         unsigned int f;
493         unsigned long flags;
494
495         if (urb->iso_frame_desc[0].status == 0 &&
496             urb->iso_frame_desc[0].actual_length == 4) {
497                 f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
498                 f >>= subs->datainterval;
499                 if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
500                         spin_lock_irqsave(&subs->lock, flags);
501                         subs->freqm = f;
502                         spin_unlock_irqrestore(&subs->lock, flags);
503                 }
504         }
505
506         return 0;
507 }
508
509 /* determine the number of frames in the next packet */
510 static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
511 {
512         if (subs->fill_max)
513                 return subs->maxframesize;
514         else {
515                 subs->phase = (subs->phase & 0xffff)
516                         + (subs->freqm << subs->datainterval);
517                 return min(subs->phase >> 16, subs->maxframesize);
518         }
519 }
520
521 /*
522  * Prepare urb for streaming before playback starts or when paused.
523  *
524  * We don't have any data, so we send a frame of silence.
525  */
526 static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
527                                        struct snd_pcm_runtime *runtime,
528                                        struct urb *urb)
529 {
530         unsigned int i, offs, counts;
531         struct snd_urb_ctx *ctx = urb->context;
532         int stride = runtime->frame_bits >> 3;
533
534         offs = 0;
535         urb->dev = ctx->subs->dev;
536         urb->number_of_packets = subs->packs_per_ms;
537         for (i = 0; i < subs->packs_per_ms; ++i) {
538                 counts = snd_usb_audio_next_packet_size(subs);
539                 urb->iso_frame_desc[i].offset = offs * stride;
540                 urb->iso_frame_desc[i].length = counts * stride;
541                 offs += counts;
542         }
543         urb->transfer_buffer_length = offs * stride;
544         memset(urb->transfer_buffer,
545                subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
546                offs * stride);
547         return 0;
548 }
549
550 /*
551  * prepare urb for playback data pipe
552  *
553  * Since a URB can handle only a single linear buffer, we must use double
554  * buffering when the data to be transferred overflows the buffer boundary.
555  * To avoid inconsistencies when updating hwptr_done, we use double buffering
556  * for all URBs.
557  */
558 static int prepare_playback_urb(struct snd_usb_substream *subs,
559                                 struct snd_pcm_runtime *runtime,
560                                 struct urb *urb)
561 {
562         int i, stride, offs;
563         unsigned int counts;
564         unsigned long flags;
565         int period_elapsed = 0;
566         struct snd_urb_ctx *ctx = urb->context;
567
568         stride = runtime->frame_bits >> 3;
569
570         offs = 0;
571         urb->dev = ctx->subs->dev; /* we need to set this at each time */
572         urb->number_of_packets = 0;
573         spin_lock_irqsave(&subs->lock, flags);
574         for (i = 0; i < ctx->packets; i++) {
575                 counts = snd_usb_audio_next_packet_size(subs);
576                 /* set up descriptor */
577                 urb->iso_frame_desc[i].offset = offs * stride;
578                 urb->iso_frame_desc[i].length = counts * stride;
579                 offs += counts;
580                 urb->number_of_packets++;
581                 subs->transfer_done += counts;
582                 if (subs->transfer_done >= runtime->period_size) {
583                         subs->transfer_done -= runtime->period_size;
584                         period_elapsed = 1;
585                         if (subs->fmt_type == USB_FORMAT_TYPE_II) {
586                                 if (subs->transfer_done > 0) {
587                                         /* FIXME: fill-max mode is not
588                                          * supported yet */
589                                         offs -= subs->transfer_done;
590                                         counts -= subs->transfer_done;
591                                         urb->iso_frame_desc[i].length =
592                                                 counts * stride;
593                                         subs->transfer_done = 0;
594                                 }
595                                 i++;
596                                 if (i < ctx->packets) {
597                                         /* add a transfer delimiter */
598                                         urb->iso_frame_desc[i].offset =
599                                                 offs * stride;
600                                         urb->iso_frame_desc[i].length = 0;
601                                         urb->number_of_packets++;
602                                 }
603                                 break;
604                         }
605                 }
606                 /* finish at the frame boundary at/after the period boundary */
607                 if (period_elapsed &&
608                     (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
609                         break;
610         }
611         if (subs->hwptr_done + offs > runtime->buffer_size) {
612                 /* err, the transferred area goes over buffer boundary. */
613                 unsigned int len = runtime->buffer_size - subs->hwptr_done;
614                 memcpy(urb->transfer_buffer,
615                        runtime->dma_area + subs->hwptr_done * stride,
616                        len * stride);
617                 memcpy(urb->transfer_buffer + len * stride,
618                        runtime->dma_area,
619                        (offs - len) * stride);
620         } else {
621                 memcpy(urb->transfer_buffer,
622                        runtime->dma_area + subs->hwptr_done * stride,
623                        offs * stride);
624         }
625         subs->hwptr_done += offs;
626         if (subs->hwptr_done >= runtime->buffer_size)
627                 subs->hwptr_done -= runtime->buffer_size;
628         spin_unlock_irqrestore(&subs->lock, flags);
629         urb->transfer_buffer_length = offs * stride;
630         if (period_elapsed)
631                 snd_pcm_period_elapsed(subs->pcm_substream);
632         return 0;
633 }
634
635 /*
636  * process after playback data complete
637  * - nothing to do
638  */
639 static int retire_playback_urb(struct snd_usb_substream *subs,
640                                struct snd_pcm_runtime *runtime,
641                                struct urb *urb)
642 {
643         return 0;
644 }
645
646
647 /*
648  */
649 static struct snd_urb_ops audio_urb_ops[2] = {
650         {
651                 .prepare =      prepare_nodata_playback_urb,
652                 .retire =       retire_playback_urb,
653                 .prepare_sync = prepare_playback_sync_urb,
654                 .retire_sync =  retire_playback_sync_urb,
655         },
656         {
657                 .prepare =      prepare_capture_urb,
658                 .retire =       retire_capture_urb,
659                 .prepare_sync = prepare_capture_sync_urb,
660                 .retire_sync =  retire_capture_sync_urb,
661         },
662 };
663
664 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
665         {
666                 .prepare =      prepare_nodata_playback_urb,
667                 .retire =       retire_playback_urb,
668                 .prepare_sync = prepare_playback_sync_urb_hs,
669                 .retire_sync =  retire_playback_sync_urb_hs,
670         },
671         {
672                 .prepare =      prepare_capture_urb,
673                 .retire =       retire_capture_urb,
674                 .prepare_sync = prepare_capture_sync_urb_hs,
675                 .retire_sync =  retire_capture_sync_urb,
676         },
677 };
678
679 /*
680  * complete callback from data urb
681  */
682 static void snd_complete_urb(struct urb *urb)
683 {
684         struct snd_urb_ctx *ctx = urb->context;
685         struct snd_usb_substream *subs = ctx->subs;
686         struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
687         int err = 0;
688
689         if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
690             ! subs->running || /* can be stopped during retire callback */
691             (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
692             (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
693                 clear_bit(ctx->index, &subs->active_mask);
694                 if (err < 0) {
695                         snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
696                         snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
697                 }
698         }
699 }
700
701
702 /*
703  * complete callback from sync urb
704  */
705 static void snd_complete_sync_urb(struct urb *urb)
706 {
707         struct snd_urb_ctx *ctx = urb->context;
708         struct snd_usb_substream *subs = ctx->subs;
709         struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
710         int err = 0;
711
712         if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
713             ! subs->running || /* can be stopped during retire callback */
714             (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
715             (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
716                 clear_bit(ctx->index + 16, &subs->active_mask);
717                 if (err < 0) {
718                         snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
719                         snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
720                 }
721         }
722 }
723
724
725 /* get the physical page pointer at the given offset */
726 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
727                                              unsigned long offset)
728 {
729         void *pageptr = subs->runtime->dma_area + offset;
730         return vmalloc_to_page(pageptr);
731 }
732
733 /* allocate virtual buffer; may be called more than once */
734 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
735 {
736         struct snd_pcm_runtime *runtime = subs->runtime;
737         if (runtime->dma_area) {
738                 if (runtime->dma_bytes >= size)
739                         return 0; /* already large enough */
740                 vfree(runtime->dma_area);
741         }
742         runtime->dma_area = vmalloc(size);
743         if (! runtime->dma_area)
744                 return -ENOMEM;
745         runtime->dma_bytes = size;
746         return 0;
747 }
748
749 /* free virtual buffer; may be called more than once */
750 static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
751 {
752         struct snd_pcm_runtime *runtime = subs->runtime;
753
754         vfree(runtime->dma_area);
755         runtime->dma_area = NULL;
756         return 0;
757 }
758
759
760 /*
761  * unlink active urbs.
762  */
763 static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
764 {
765         unsigned int i;
766         int async;
767
768         subs->running = 0;
769
770         if (!force && subs->stream->chip->shutdown) /* to be sure... */
771                 return -EBADFD;
772
773         async = !can_sleep && async_unlink;
774
775         if (! async && in_interrupt())
776                 return 0;
777
778         for (i = 0; i < subs->nurbs; i++) {
779                 if (test_bit(i, &subs->active_mask)) {
780                         if (! test_and_set_bit(i, &subs->unlink_mask)) {
781                                 struct urb *u = subs->dataurb[i].urb;
782                                 if (async)
783                                         usb_unlink_urb(u);
784                                 else
785                                         usb_kill_urb(u);
786                         }
787                 }
788         }
789         if (subs->syncpipe) {
790                 for (i = 0; i < SYNC_URBS; i++) {
791                         if (test_bit(i+16, &subs->active_mask)) {
792                                 if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
793                                         struct urb *u = subs->syncurb[i].urb;
794                                         if (async)
795                                                 usb_unlink_urb(u);
796                                         else
797                                                 usb_kill_urb(u);
798                                 }
799                         }
800                 }
801         }
802         return 0;
803 }
804
805
806 static const char *usb_error_string(int err)
807 {
808         switch (err) {
809         case -ENODEV:
810                 return "no device";
811         case -ENOENT:
812                 return "endpoint not enabled";
813         case -EPIPE:
814                 return "endpoint stalled";
815         case -ENOSPC:
816                 return "not enough bandwidth";
817         case -ESHUTDOWN:
818                 return "device disabled";
819         case -EHOSTUNREACH:
820                 return "device suspended";
821 #ifndef CONFIG_USB_EHCI_SPLIT_ISO
822         case -ENOSYS:
823                 return "enable CONFIG_USB_EHCI_SPLIT_ISO to play through a hub";
824 #endif
825         case -EINVAL:
826         case -EAGAIN:
827         case -EFBIG:
828         case -EMSGSIZE:
829                 return "internal error";
830         default:
831                 return "unknown error";
832         }
833 }
834
835 /*
836  * set up and start data/sync urbs
837  */
838 static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
839 {
840         unsigned int i;
841         int err;
842
843         if (subs->stream->chip->shutdown)
844                 return -EBADFD;
845
846         for (i = 0; i < subs->nurbs; i++) {
847                 snd_assert(subs->dataurb[i].urb, return -EINVAL);
848                 if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
849                         snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
850                         goto __error;
851                 }
852         }
853         if (subs->syncpipe) {
854                 for (i = 0; i < SYNC_URBS; i++) {
855                         snd_assert(subs->syncurb[i].urb, return -EINVAL);
856                         if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
857                                 snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
858                                 goto __error;
859                         }
860                 }
861         }
862
863         subs->active_mask = 0;
864         subs->unlink_mask = 0;
865         subs->running = 1;
866         for (i = 0; i < subs->nurbs; i++) {
867                 err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
868                 if (err < 0) {
869                         snd_printk(KERN_ERR "cannot submit datapipe "
870                                    "for urb %d, error %d: %s\n",
871                                    i, err, usb_error_string(err));
872                         goto __error;
873                 }
874                 set_bit(i, &subs->active_mask);
875         }
876         if (subs->syncpipe) {
877                 for (i = 0; i < SYNC_URBS; i++) {
878                         err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
879                         if (err < 0) {
880                                 snd_printk(KERN_ERR "cannot submit syncpipe "
881                                            "for urb %d, error %d: %s\n",
882                                            i, err, usb_error_string(err));
883                                 goto __error;
884                         }
885                         set_bit(i + 16, &subs->active_mask);
886                 }
887         }
888         return 0;
889
890  __error:
891         // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
892         deactivate_urbs(subs, 0, 0);
893         return -EPIPE;
894 }
895
896
897 /*
898  *  wait until all urbs are processed.
899  */
900 static int wait_clear_urbs(struct snd_usb_substream *subs)
901 {
902         unsigned long end_time = jiffies + msecs_to_jiffies(1000);
903         unsigned int i;
904         int alive;
905
906         do {
907                 alive = 0;
908                 for (i = 0; i < subs->nurbs; i++) {
909                         if (test_bit(i, &subs->active_mask))
910                                 alive++;
911                 }
912                 if (subs->syncpipe) {
913                         for (i = 0; i < SYNC_URBS; i++) {
914                                 if (test_bit(i + 16, &subs->active_mask))
915                                         alive++;
916                         }
917                 }
918                 if (! alive)
919                         break;
920                 schedule_timeout_uninterruptible(1);
921         } while (time_before(jiffies, end_time));
922         if (alive)
923                 snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
924         return 0;
925 }
926
927
928 /*
929  * return the current pcm pointer.  just return the hwptr_done value.
930  */
931 static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
932 {
933         struct snd_usb_substream *subs;
934         snd_pcm_uframes_t hwptr_done;
935         
936         subs = (struct snd_usb_substream *)substream->runtime->private_data;
937         spin_lock(&subs->lock);
938         hwptr_done = subs->hwptr_done;
939         spin_unlock(&subs->lock);
940         return hwptr_done;
941 }
942
943
944 /*
945  * start/stop playback substream
946  */
947 static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
948                                         int cmd)
949 {
950         struct snd_usb_substream *subs = substream->runtime->private_data;
951
952         switch (cmd) {
953         case SNDRV_PCM_TRIGGER_START:
954         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
955                 subs->ops.prepare = prepare_playback_urb;
956                 return 0;
957         case SNDRV_PCM_TRIGGER_STOP:
958                 return deactivate_urbs(subs, 0, 0);
959         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
960                 subs->ops.prepare = prepare_nodata_playback_urb;
961                 return 0;
962         default:
963                 return -EINVAL;
964         }
965 }
966
967 /*
968  * start/stop capture substream
969  */
970 static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
971                                        int cmd)
972 {
973         struct snd_usb_substream *subs = substream->runtime->private_data;
974
975         switch (cmd) {
976         case SNDRV_PCM_TRIGGER_START:
977                 subs->ops.retire = retire_capture_urb;
978                 return start_urbs(subs, substream->runtime);
979         case SNDRV_PCM_TRIGGER_STOP:
980                 return deactivate_urbs(subs, 0, 0);
981         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
982                 subs->ops.retire = retire_paused_capture_urb;
983                 return 0;
984         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
985                 subs->ops.retire = retire_capture_urb;
986                 return 0;
987         default:
988                 return -EINVAL;
989         }
990 }
991
992
993 /*
994  * release a urb data
995  */
996 static void release_urb_ctx(struct snd_urb_ctx *u)
997 {
998         if (u->urb) {
999                 if (u->buffer_size)
1000                         usb_buffer_free(u->subs->dev, u->buffer_size,
1001                                         u->urb->transfer_buffer,
1002                                         u->urb->transfer_dma);
1003                 usb_free_urb(u->urb);
1004                 u->urb = NULL;
1005         }
1006 }
1007
1008 /*
1009  * release a substream
1010  */
1011 static void release_substream_urbs(struct snd_usb_substream *subs, int force)
1012 {
1013         int i;
1014
1015         /* stop urbs (to be sure) */
1016         deactivate_urbs(subs, force, 1);
1017         wait_clear_urbs(subs);
1018
1019         for (i = 0; i < MAX_URBS; i++)
1020                 release_urb_ctx(&subs->dataurb[i]);
1021         for (i = 0; i < SYNC_URBS; i++)
1022                 release_urb_ctx(&subs->syncurb[i]);
1023         usb_buffer_free(subs->dev, SYNC_URBS * 4,
1024                         subs->syncbuf, subs->sync_dma);
1025         subs->syncbuf = NULL;
1026         subs->nurbs = 0;
1027 }
1028
1029 /*
1030  * initialize a substream for plaback/capture
1031  */
1032 static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
1033                                unsigned int rate, unsigned int frame_bits)
1034 {
1035         unsigned int maxsize, n, i;
1036         int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1037         unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
1038
1039         /* calculate the frequency in 16.16 format */
1040         if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1041                 subs->freqn = get_usb_full_speed_rate(rate);
1042         else
1043                 subs->freqn = get_usb_high_speed_rate(rate);
1044         subs->freqm = subs->freqn;
1045         /* calculate max. frequency */
1046         if (subs->maxpacksize) {
1047                 /* whatever fits into a max. size packet */
1048                 maxsize = subs->maxpacksize;
1049                 subs->freqmax = (maxsize / (frame_bits >> 3))
1050                                 << (16 - subs->datainterval);
1051         } else {
1052                 /* no max. packet size: just take 25% higher than nominal */
1053                 subs->freqmax = subs->freqn + (subs->freqn >> 2);
1054                 maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
1055                                 >> (16 - subs->datainterval);
1056         }
1057         subs->phase = 0;
1058
1059         if (subs->fill_max)
1060                 subs->curpacksize = subs->maxpacksize;
1061         else
1062                 subs->curpacksize = maxsize;
1063
1064         if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
1065                 packs_per_ms = 8 >> subs->datainterval;
1066         else
1067                 packs_per_ms = 1;
1068         subs->packs_per_ms = packs_per_ms;
1069
1070         if (is_playback) {
1071                 urb_packs = nrpacks;
1072                 urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
1073                 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
1074         } else
1075                 urb_packs = 1;
1076         urb_packs *= packs_per_ms;
1077
1078         /* decide how many packets to be used */
1079         if (is_playback) {
1080                 unsigned int minsize;
1081                 /* determine how small a packet can be */
1082                 minsize = (subs->freqn >> (16 - subs->datainterval))
1083                           * (frame_bits >> 3);
1084                 /* with sync from device, assume it can be 12% lower */
1085                 if (subs->syncpipe)
1086                         minsize -= minsize >> 3;
1087                 minsize = max(minsize, 1u);
1088                 total_packs = (period_bytes + minsize - 1) / minsize;
1089                 /* round up to multiple of packs_per_ms */
1090                 total_packs = (total_packs + packs_per_ms - 1)
1091                                 & ~(packs_per_ms - 1);
1092                 /* we need at least two URBs for queueing */
1093                 if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
1094                         total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
1095         } else {
1096                 total_packs = MAX_URBS * urb_packs;
1097         }
1098         subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
1099         if (subs->nurbs > MAX_URBS) {
1100                 /* too much... */
1101                 subs->nurbs = MAX_URBS;
1102                 total_packs = MAX_URBS * urb_packs;
1103         }
1104         n = total_packs;
1105         for (i = 0; i < subs->nurbs; i++) {
1106                 npacks[i] = n > urb_packs ? urb_packs : n;
1107                 n -= urb_packs;
1108         }
1109         if (subs->nurbs <= 1) {
1110                 /* too little - we need at least two packets
1111                  * to ensure contiguous playback/capture
1112                  */
1113                 subs->nurbs = 2;
1114                 npacks[0] = (total_packs + 1) / 2;
1115                 npacks[1] = total_packs - npacks[0];
1116         } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
1117                 /* the last packet is too small.. */
1118                 if (subs->nurbs > 2) {
1119                         /* merge to the first one */
1120                         npacks[0] += npacks[subs->nurbs - 1];
1121                         subs->nurbs--;
1122                 } else {
1123                         /* divide to two */
1124                         subs->nurbs = 2;
1125                         npacks[0] = (total_packs + 1) / 2;
1126                         npacks[1] = total_packs - npacks[0];
1127                 }
1128         }
1129
1130         /* allocate and initialize data urbs */
1131         for (i = 0; i < subs->nurbs; i++) {
1132                 struct snd_urb_ctx *u = &subs->dataurb[i];
1133                 u->index = i;
1134                 u->subs = subs;
1135                 u->packets = npacks[i];
1136                 u->buffer_size = maxsize * u->packets;
1137                 if (subs->fmt_type == USB_FORMAT_TYPE_II)
1138                         u->packets++; /* for transfer delimiter */
1139                 u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
1140                 if (! u->urb)
1141                         goto out_of_memory;
1142                 u->urb->transfer_buffer =
1143                         usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
1144                                          &u->urb->transfer_dma);
1145                 if (! u->urb->transfer_buffer)
1146                         goto out_of_memory;
1147                 u->urb->pipe = subs->datapipe;
1148                 u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1149                 u->urb->interval = 1 << subs->datainterval;
1150                 u->urb->context = u;
1151                 u->urb->complete = snd_complete_urb;
1152         }
1153
1154         if (subs->syncpipe) {
1155                 /* allocate and initialize sync urbs */
1156                 subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
1157                                                  GFP_KERNEL, &subs->sync_dma);
1158                 if (! subs->syncbuf)
1159                         goto out_of_memory;
1160                 for (i = 0; i < SYNC_URBS; i++) {
1161                         struct snd_urb_ctx *u = &subs->syncurb[i];
1162                         u->index = i;
1163                         u->subs = subs;
1164                         u->packets = 1;
1165                         u->urb = usb_alloc_urb(1, GFP_KERNEL);
1166                         if (! u->urb)
1167                                 goto out_of_memory;
1168                         u->urb->transfer_buffer = subs->syncbuf + i * 4;
1169                         u->urb->transfer_dma = subs->sync_dma + i * 4;
1170                         u->urb->transfer_buffer_length = 4;
1171                         u->urb->pipe = subs->syncpipe;
1172                         u->urb->transfer_flags = URB_ISO_ASAP |
1173                                                  URB_NO_TRANSFER_DMA_MAP;
1174                         u->urb->number_of_packets = 1;
1175                         u->urb->interval = 1 << subs->syncinterval;
1176                         u->urb->context = u;
1177                         u->urb->complete = snd_complete_sync_urb;
1178                 }
1179         }
1180         return 0;
1181
1182 out_of_memory:
1183         release_substream_urbs(subs, 0);
1184         return -ENOMEM;
1185 }
1186
1187
1188 /*
1189  * find a matching audio format
1190  */
1191 static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
1192                                        unsigned int rate, unsigned int channels)
1193 {
1194         struct list_head *p;
1195         struct audioformat *found = NULL;
1196         int cur_attr = 0, attr;
1197
1198         list_for_each(p, &subs->fmt_list) {
1199                 struct audioformat *fp;
1200                 fp = list_entry(p, struct audioformat, list);
1201                 if (fp->format != format || fp->channels != channels)
1202                         continue;
1203                 if (rate < fp->rate_min || rate > fp->rate_max)
1204                         continue;
1205                 if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
1206                         unsigned int i;
1207                         for (i = 0; i < fp->nr_rates; i++)
1208                                 if (fp->rate_table[i] == rate)
1209                                         break;
1210                         if (i >= fp->nr_rates)
1211                                 continue;
1212                 }
1213                 attr = fp->ep_attr & EP_ATTR_MASK;
1214                 if (! found) {
1215                         found = fp;
1216                         cur_attr = attr;
1217                         continue;
1218                 }
1219                 /* avoid async out and adaptive in if the other method
1220                  * supports the same format.
1221                  * this is a workaround for the case like
1222                  * M-audio audiophile USB.
1223                  */
1224                 if (attr != cur_attr) {
1225                         if ((attr == EP_ATTR_ASYNC &&
1226                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1227                             (attr == EP_ATTR_ADAPTIVE &&
1228                              subs->direction == SNDRV_PCM_STREAM_CAPTURE))
1229                                 continue;
1230                         if ((cur_attr == EP_ATTR_ASYNC &&
1231                              subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
1232                             (cur_attr == EP_ATTR_ADAPTIVE &&
1233                              subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
1234                                 found = fp;
1235                                 cur_attr = attr;
1236                                 continue;
1237                         }
1238                 }
1239                 /* find the format with the largest max. packet size */
1240                 if (fp->maxpacksize > found->maxpacksize) {
1241                         found = fp;
1242                         cur_attr = attr;
1243                 }
1244         }
1245         return found;
1246 }
1247
1248
1249 /*
1250  * initialize the picth control and sample rate
1251  */
1252 static int init_usb_pitch(struct usb_device *dev, int iface,
1253                           struct usb_host_interface *alts,
1254                           struct audioformat *fmt)
1255 {
1256         unsigned int ep;
1257         unsigned char data[1];
1258         int err;
1259
1260         ep = get_endpoint(alts, 0)->bEndpointAddress;
1261         /* if endpoint has pitch control, enable it */
1262         if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
1263                 data[0] = 1;
1264                 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1265                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1266                                            PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
1267                         snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
1268                                    dev->devnum, iface, ep);
1269                         return err;
1270                 }
1271         }
1272         return 0;
1273 }
1274
1275 static int init_usb_sample_rate(struct usb_device *dev, int iface,
1276                                 struct usb_host_interface *alts,
1277                                 struct audioformat *fmt, int rate)
1278 {
1279         unsigned int ep;
1280         unsigned char data[3];
1281         int err;
1282
1283         ep = get_endpoint(alts, 0)->bEndpointAddress;
1284         /* if endpoint has sampling rate control, set it */
1285         if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
1286                 int crate;
1287                 data[0] = rate;
1288                 data[1] = rate >> 8;
1289                 data[2] = rate >> 16;
1290                 if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
1291                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
1292                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1293                         snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
1294                                    dev->devnum, iface, fmt->altsetting, rate, ep);
1295                         return err;
1296                 }
1297                 if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
1298                                            USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
1299                                            SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
1300                         snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
1301                                    dev->devnum, iface, fmt->altsetting, ep);
1302                         return 0; /* some devices don't support reading */
1303                 }
1304                 crate = data[0] | (data[1] << 8) | (data[2] << 16);
1305                 if (crate != rate) {
1306                         snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
1307                         // runtime->rate = crate;
1308                 }
1309         }
1310         return 0;
1311 }
1312
1313 /*
1314  * find a matching format and set up the interface
1315  */
1316 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
1317 {
1318         struct usb_device *dev = subs->dev;
1319         struct usb_host_interface *alts;
1320         struct usb_interface_descriptor *altsd;
1321         struct usb_interface *iface;
1322         unsigned int ep, attr;
1323         int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
1324         int err;
1325
1326         iface = usb_ifnum_to_if(dev, fmt->iface);
1327         snd_assert(iface, return -EINVAL);
1328         alts = &iface->altsetting[fmt->altset_idx];
1329         altsd = get_iface_desc(alts);
1330         snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
1331
1332         if (fmt == subs->cur_audiofmt)
1333                 return 0;
1334
1335         /* close the old interface */
1336         if (subs->interface >= 0 && subs->interface != fmt->iface) {
1337                 if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
1338                         snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
1339                                 dev->devnum, fmt->iface, fmt->altsetting);
1340                         return -EIO;
1341                 }
1342                 subs->interface = -1;
1343                 subs->format = 0;
1344         }
1345
1346         /* set interface */
1347         if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
1348                 if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
1349                         snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
1350                                    dev->devnum, fmt->iface, fmt->altsetting);
1351                         return -EIO;
1352                 }
1353                 snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
1354                 subs->interface = fmt->iface;
1355                 subs->format = fmt->altset_idx;
1356         }
1357
1358         /* create a data pipe */
1359         ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
1360         if (is_playback)
1361                 subs->datapipe = usb_sndisocpipe(dev, ep);
1362         else
1363                 subs->datapipe = usb_rcvisocpipe(dev, ep);
1364         if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
1365             get_endpoint(alts, 0)->bInterval >= 1 &&
1366             get_endpoint(alts, 0)->bInterval <= 4)
1367                 subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
1368         else
1369                 subs->datainterval = 0;
1370         subs->syncpipe = subs->syncinterval = 0;
1371         subs->maxpacksize = fmt->maxpacksize;
1372         subs->fill_max = 0;
1373
1374         /* we need a sync pipe in async OUT or adaptive IN mode */
1375         /* check the number of EP, since some devices have broken
1376          * descriptors which fool us.  if it has only one EP,
1377          * assume it as adaptive-out or sync-in.
1378          */
1379         attr = fmt->ep_attr & EP_ATTR_MASK;
1380         if (((is_playback && attr == EP_ATTR_ASYNC) ||
1381              (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
1382             altsd->bNumEndpoints >= 2) {
1383                 /* check sync-pipe endpoint */
1384                 /* ... and check descriptor size before accessing bSynchAddress
1385                    because there is a version of the SB Audigy 2 NX firmware lacking
1386                    the audio fields in the endpoint descriptors */
1387                 if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
1388                     (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1389                      get_endpoint(alts, 1)->bSynchAddress != 0)) {
1390                         snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1391                                    dev->devnum, fmt->iface, fmt->altsetting);
1392                         return -EINVAL;
1393                 }
1394                 ep = get_endpoint(alts, 1)->bEndpointAddress;
1395                 if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1396                     (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
1397                      (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
1398                         snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
1399                                    dev->devnum, fmt->iface, fmt->altsetting);
1400                         return -EINVAL;
1401                 }
1402                 ep &= USB_ENDPOINT_NUMBER_MASK;
1403                 if (is_playback)
1404                         subs->syncpipe = usb_rcvisocpipe(dev, ep);
1405                 else
1406                         subs->syncpipe = usb_sndisocpipe(dev, ep);
1407                 if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
1408                     get_endpoint(alts, 1)->bRefresh >= 1 &&
1409                     get_endpoint(alts, 1)->bRefresh <= 9)
1410                         subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
1411                 else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
1412                         subs->syncinterval = 1;
1413                 else if (get_endpoint(alts, 1)->bInterval >= 1 &&
1414                          get_endpoint(alts, 1)->bInterval <= 16)
1415                         subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
1416                 else
1417                         subs->syncinterval = 3;
1418         }
1419
1420         /* always fill max packet size */
1421         if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
1422                 subs->fill_max = 1;
1423
1424         if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
1425                 return err;
1426
1427         subs->cur_audiofmt = fmt;
1428
1429 #if 0
1430         printk("setting done: format = %d, rate = %d, channels = %d\n",
1431                fmt->format, fmt->rate, fmt->channels);
1432         printk("  datapipe = 0x%0x, syncpipe = 0x%0x\n",
1433                subs->datapipe, subs->syncpipe);
1434 #endif
1435
1436         return 0;
1437 }
1438
1439 /*
1440  * hw_params callback
1441  *
1442  * allocate a buffer and set the given audio format.
1443  *
1444  * so far we use a physically linear buffer although packetize transfer
1445  * doesn't need a continuous area.
1446  * if sg buffer is supported on the later version of alsa, we'll follow
1447  * that.
1448  */
1449 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
1450                              struct snd_pcm_hw_params *hw_params)
1451 {
1452         struct snd_usb_substream *subs = substream->runtime->private_data;
1453         struct audioformat *fmt;
1454         unsigned int channels, rate, format;
1455         int ret, changed;
1456
1457         ret = snd_pcm_alloc_vmalloc_buffer(substream,
1458                                            params_buffer_bytes(hw_params));
1459         if (ret < 0)
1460                 return ret;
1461
1462         format = params_format(hw_params);
1463         rate = params_rate(hw_params);
1464         channels = params_channels(hw_params);
1465         fmt = find_format(subs, format, rate, channels);
1466         if (! fmt) {
1467                 snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
1468                            format, rate, channels);
1469                 return -EINVAL;
1470         }
1471
1472         changed = subs->cur_audiofmt != fmt ||
1473                 subs->period_bytes != params_period_bytes(hw_params) ||
1474                 subs->cur_rate != rate;
1475         if ((ret = set_format(subs, fmt)) < 0)
1476                 return ret;
1477
1478         if (subs->cur_rate != rate) {
1479                 struct usb_host_interface *alts;
1480                 struct usb_interface *iface;
1481                 iface = usb_ifnum_to_if(subs->dev, fmt->iface);
1482                 alts = &iface->altsetting[fmt->altset_idx];
1483                 ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
1484                 if (ret < 0)
1485                         return ret;
1486                 subs->cur_rate = rate;
1487         }
1488
1489         if (changed) {
1490                 /* format changed */
1491                 release_substream_urbs(subs, 0);
1492                 /* influenced: period_bytes, channels, rate, format, */
1493                 ret = init_substream_urbs(subs, params_period_bytes(hw_params),
1494                                           params_rate(hw_params),
1495                                           snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
1496         }
1497
1498         return ret;
1499 }
1500
1501 /*
1502  * hw_free callback
1503  *
1504  * reset the audio format and release the buffer
1505  */
1506 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
1507 {
1508         struct snd_usb_substream *subs = substream->runtime->private_data;
1509
1510         subs->cur_audiofmt = NULL;
1511         subs->cur_rate = 0;
1512         subs->period_bytes = 0;
1513         if (!subs->stream->chip->shutdown)
1514                 release_substream_urbs(subs, 0);
1515         return snd_pcm_free_vmalloc_buffer(substream);
1516 }
1517
1518 /*
1519  * prepare callback
1520  *
1521  * only a few subtle things...
1522  */
1523 static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
1524 {
1525         struct snd_pcm_runtime *runtime = substream->runtime;
1526         struct snd_usb_substream *subs = runtime->private_data;
1527
1528         if (! subs->cur_audiofmt) {
1529                 snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
1530                 return -ENXIO;
1531         }
1532
1533         /* some unit conversions in runtime */
1534         subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
1535         subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
1536
1537         /* reset the pointer */
1538         subs->hwptr_done = 0;
1539         subs->transfer_done = 0;
1540         subs->phase = 0;
1541
1542         /* clear urbs (to be sure) */
1543         deactivate_urbs(subs, 0, 1);
1544         wait_clear_urbs(subs);
1545
1546         /* for playback, submit the URBs now; otherwise, the first hwptr_done
1547          * updates for all URBs would happen at the same time when starting */
1548         if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1549                 subs->ops.prepare = prepare_nodata_playback_urb;
1550                 return start_urbs(subs, runtime);
1551         } else
1552                 return 0;
1553 }
1554
1555 static struct snd_pcm_hardware snd_usb_hardware =
1556 {
1557         .info =                 SNDRV_PCM_INFO_MMAP |
1558                                 SNDRV_PCM_INFO_MMAP_VALID |
1559                                 SNDRV_PCM_INFO_BATCH |
1560                                 SNDRV_PCM_INFO_INTERLEAVED |
1561                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1562                                 SNDRV_PCM_INFO_PAUSE,
1563         .buffer_bytes_max =     1024 * 1024,
1564         .period_bytes_min =     64,
1565         .period_bytes_max =     512 * 1024,
1566         .periods_min =          2,
1567         .periods_max =          1024,
1568 };
1569
1570 /*
1571  * h/w constraints
1572  */
1573
1574 #ifdef HW_CONST_DEBUG
1575 #define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
1576 #else
1577 #define hwc_debug(fmt, args...) /**/
1578 #endif
1579
1580 static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
1581 {
1582         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1583         struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1584         struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1585
1586         /* check the format */
1587         if (! snd_mask_test(fmts, fp->format)) {
1588                 hwc_debug("   > check: no supported format %d\n", fp->format);
1589                 return 0;
1590         }
1591         /* check the channels */
1592         if (fp->channels < ct->min || fp->channels > ct->max) {
1593                 hwc_debug("   > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
1594                 return 0;
1595         }
1596         /* check the rate is within the range */
1597         if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
1598                 hwc_debug("   > check: rate_min %d > max %d\n", fp->rate_min, it->max);
1599                 return 0;
1600         }
1601         if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
1602                 hwc_debug("   > check: rate_max %d < min %d\n", fp->rate_max, it->min);
1603                 return 0;
1604         }
1605         return 1;
1606 }
1607
1608 static int hw_rule_rate(struct snd_pcm_hw_params *params,
1609                         struct snd_pcm_hw_rule *rule)
1610 {
1611         struct snd_usb_substream *subs = rule->private;
1612         struct list_head *p;
1613         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
1614         unsigned int rmin, rmax;
1615         int changed;
1616
1617         hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
1618         changed = 0;
1619         rmin = rmax = 0;
1620         list_for_each(p, &subs->fmt_list) {
1621                 struct audioformat *fp;
1622                 fp = list_entry(p, struct audioformat, list);
1623                 if (! hw_check_valid_format(params, fp))
1624                         continue;
1625                 if (changed++) {
1626                         if (rmin > fp->rate_min)
1627                                 rmin = fp->rate_min;
1628                         if (rmax < fp->rate_max)
1629                                 rmax = fp->rate_max;
1630                 } else {
1631                         rmin = fp->rate_min;
1632                         rmax = fp->rate_max;
1633                 }
1634         }
1635
1636         if (! changed) {
1637                 hwc_debug("  --> get empty\n");
1638                 it->empty = 1;
1639                 return -EINVAL;
1640         }
1641
1642         changed = 0;
1643         if (it->min < rmin) {
1644                 it->min = rmin;
1645                 it->openmin = 0;
1646                 changed = 1;
1647         }
1648         if (it->max > rmax) {
1649                 it->max = rmax;
1650                 it->openmax = 0;
1651                 changed = 1;
1652         }
1653         if (snd_interval_checkempty(it)) {
1654                 it->empty = 1;
1655                 return -EINVAL;
1656         }
1657         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1658         return changed;
1659 }
1660
1661
1662 static int hw_rule_channels(struct snd_pcm_hw_params *params,
1663                             struct snd_pcm_hw_rule *rule)
1664 {
1665         struct snd_usb_substream *subs = rule->private;
1666         struct list_head *p;
1667         struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
1668         unsigned int rmin, rmax;
1669         int changed;
1670
1671         hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
1672         changed = 0;
1673         rmin = rmax = 0;
1674         list_for_each(p, &subs->fmt_list) {
1675                 struct audioformat *fp;
1676                 fp = list_entry(p, struct audioformat, list);
1677                 if (! hw_check_valid_format(params, fp))
1678                         continue;
1679                 if (changed++) {
1680                         if (rmin > fp->channels)
1681                                 rmin = fp->channels;
1682                         if (rmax < fp->channels)
1683                                 rmax = fp->channels;
1684                 } else {
1685                         rmin = fp->channels;
1686                         rmax = fp->channels;
1687                 }
1688         }
1689
1690         if (! changed) {
1691                 hwc_debug("  --> get empty\n");
1692                 it->empty = 1;
1693                 return -EINVAL;
1694         }
1695
1696         changed = 0;
1697         if (it->min < rmin) {
1698                 it->min = rmin;
1699                 it->openmin = 0;
1700                 changed = 1;
1701         }
1702         if (it->max > rmax) {
1703                 it->max = rmax;
1704                 it->openmax = 0;
1705                 changed = 1;
1706         }
1707         if (snd_interval_checkempty(it)) {
1708                 it->empty = 1;
1709                 return -EINVAL;
1710         }
1711         hwc_debug("  --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
1712         return changed;
1713 }
1714
1715 static int hw_rule_format(struct snd_pcm_hw_params *params,
1716                           struct snd_pcm_hw_rule *rule)
1717 {
1718         struct snd_usb_substream *subs = rule->private;
1719         struct list_head *p;
1720         struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1721         u64 fbits;
1722         u32 oldbits[2];
1723         int changed;
1724
1725         hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
1726         fbits = 0;
1727         list_for_each(p, &subs->fmt_list) {
1728                 struct audioformat *fp;
1729                 fp = list_entry(p, struct audioformat, list);
1730                 if (! hw_check_valid_format(params, fp))
1731                         continue;
1732                 fbits |= (1ULL << fp->format);
1733         }
1734
1735         oldbits[0] = fmt->bits[0];
1736         oldbits[1] = fmt->bits[1];
1737         fmt->bits[0] &= (u32)fbits;
1738         fmt->bits[1] &= (u32)(fbits >> 32);
1739         if (! fmt->bits[0] && ! fmt->bits[1]) {
1740                 hwc_debug("  --> get empty\n");
1741                 return -EINVAL;
1742         }
1743         changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
1744         hwc_debug("  --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
1745         return changed;
1746 }
1747
1748 #define MAX_MASK        64
1749
1750 /*
1751  * check whether the registered audio formats need special hw-constraints
1752  */
1753 static int check_hw_params_convention(struct snd_usb_substream *subs)
1754 {
1755         int i;
1756         u32 *channels;
1757         u32 *rates;
1758         u32 cmaster, rmaster;
1759         u32 rate_min = 0, rate_max = 0;
1760         struct list_head *p;
1761         int err = 1;
1762
1763         channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1764         rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
1765
1766         list_for_each(p, &subs->fmt_list) {
1767                 struct audioformat *f;
1768                 f = list_entry(p, struct audioformat, list);
1769                 /* unconventional channels? */
1770                 if (f->channels > 32)
1771                         goto __out;
1772                 /* continuous rate min/max matches? */
1773                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1774                         if (rate_min && f->rate_min != rate_min)
1775                                 goto __out;
1776                         if (rate_max && f->rate_max != rate_max)
1777                                 goto __out;
1778                         rate_min = f->rate_min;
1779                         rate_max = f->rate_max;
1780                 }
1781                 /* combination of continuous rates and fixed rates? */
1782                 if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
1783                         if (f->rates != rates[f->format])
1784                                 goto __out;
1785                 }
1786                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
1787                         if (rates[f->format] && rates[f->format] != f->rates)
1788                                 goto __out;
1789                 }
1790                 channels[f->format] |= (1 << f->channels);
1791                 rates[f->format] |= f->rates;
1792                 /* needs knot? */
1793                 if (f->rates & SNDRV_PCM_RATE_KNOT)
1794                         goto __out;
1795         }
1796         /* check whether channels and rates match for all formats */
1797         cmaster = rmaster = 0;
1798         for (i = 0; i < MAX_MASK; i++) {
1799                 if (cmaster != channels[i] && cmaster && channels[i])
1800                         goto __out;
1801                 if (rmaster != rates[i] && rmaster && rates[i])
1802                         goto __out;
1803                 if (channels[i])
1804                         cmaster = channels[i];
1805                 if (rates[i])
1806                         rmaster = rates[i];
1807         }
1808         /* check whether channels match for all distinct rates */
1809         memset(channels, 0, MAX_MASK * sizeof(u32));
1810         list_for_each(p, &subs->fmt_list) {
1811                 struct audioformat *f;
1812                 f = list_entry(p, struct audioformat, list);
1813                 if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
1814                         continue;
1815                 for (i = 0; i < 32; i++) {
1816                         if (f->rates & (1 << i))
1817                                 channels[i] |= (1 << f->channels);
1818                 }
1819         }
1820         cmaster = 0;
1821         for (i = 0; i < 32; i++) {
1822                 if (cmaster != channels[i] && cmaster && channels[i])
1823                         goto __out;
1824                 if (channels[i])
1825                         cmaster = channels[i];
1826         }
1827         err = 0;
1828
1829  __out:
1830         kfree(channels);
1831         kfree(rates);
1832         return err;
1833 }
1834
1835 /*
1836  *  If the device supports unusual bit rates, does the request meet these?
1837  */
1838 static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
1839                                   struct snd_usb_substream *subs)
1840 {
1841         struct audioformat *fp;
1842         int count = 0, needs_knot = 0;
1843         int err;
1844
1845         list_for_each_entry(fp, &subs->fmt_list, list) {
1846                 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
1847                         return 0;
1848                 count += fp->nr_rates;
1849                 if (fp->rates & SNDRV_PCM_RATE_KNOT)
1850                         needs_knot = 1;
1851         }
1852         if (!needs_knot)
1853                 return 0;
1854
1855         subs->rate_list.count = count;
1856         subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
1857         subs->rate_list.mask = 0;
1858         count = 0;
1859         list_for_each_entry(fp, &subs->fmt_list, list) {
1860                 int i;
1861                 for (i = 0; i < fp->nr_rates; i++)
1862                         subs->rate_list.list[count++] = fp->rate_table[i];
1863         }
1864         err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1865                                          &subs->rate_list);
1866         if (err < 0)
1867                 return err;
1868
1869         return 0;
1870 }
1871
1872
1873 /*
1874  * set up the runtime hardware information.
1875  */
1876
1877 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
1878 {
1879         struct list_head *p;
1880         int err;
1881
1882         runtime->hw.formats = subs->formats;
1883
1884         runtime->hw.rate_min = 0x7fffffff;
1885         runtime->hw.rate_max = 0;
1886         runtime->hw.channels_min = 256;
1887         runtime->hw.channels_max = 0;
1888         runtime->hw.rates = 0;
1889         /* check min/max rates and channels */
1890         list_for_each(p, &subs->fmt_list) {
1891                 struct audioformat *fp;
1892                 fp = list_entry(p, struct audioformat, list);
1893                 runtime->hw.rates |= fp->rates;
1894                 if (runtime->hw.rate_min > fp->rate_min)
1895                         runtime->hw.rate_min = fp->rate_min;
1896                 if (runtime->hw.rate_max < fp->rate_max)
1897                         runtime->hw.rate_max = fp->rate_max;
1898                 if (runtime->hw.channels_min > fp->channels)
1899                         runtime->hw.channels_min = fp->channels;
1900                 if (runtime->hw.channels_max < fp->channels)
1901                         runtime->hw.channels_max = fp->channels;
1902                 if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
1903                         /* FIXME: there might be more than one audio formats... */
1904                         runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
1905                                 fp->frame_size;
1906                 }
1907         }
1908
1909         /* set the period time minimum 1ms */
1910         /* FIXME: high-speed mode allows 125us minimum period, but many parts
1911          * in the current code assume the 1ms period.
1912          */
1913         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1914                                      1000 * MIN_PACKS_URB,
1915                                      /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
1916
1917         if (check_hw_params_convention(subs)) {
1918                 hwc_debug("setting extra hw constraints...\n");
1919                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1920                                                hw_rule_rate, subs,
1921                                                SNDRV_PCM_HW_PARAM_FORMAT,
1922                                                SNDRV_PCM_HW_PARAM_CHANNELS,
1923                                                -1)) < 0)
1924                         return err;
1925                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1926                                                hw_rule_channels, subs,
1927                                                SNDRV_PCM_HW_PARAM_FORMAT,
1928                                                SNDRV_PCM_HW_PARAM_RATE,
1929                                                -1)) < 0)
1930                         return err;
1931                 if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1932                                                hw_rule_format, subs,
1933                                                SNDRV_PCM_HW_PARAM_RATE,
1934                                                SNDRV_PCM_HW_PARAM_CHANNELS,
1935                                                -1)) < 0)
1936                         return err;
1937                 if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
1938                         return err;
1939         }
1940         return 0;
1941 }
1942
1943 static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
1944 {
1945         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1946         struct snd_pcm_runtime *runtime = substream->runtime;
1947         struct snd_usb_substream *subs = &as->substream[direction];
1948
1949         subs->interface = -1;
1950         subs->format = 0;
1951         runtime->hw = snd_usb_hardware;
1952         runtime->private_data = subs;
1953         subs->pcm_substream = substream;
1954         return setup_hw_info(runtime, subs);
1955 }
1956
1957 static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
1958 {
1959         struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
1960         struct snd_usb_substream *subs = &as->substream[direction];
1961
1962         if (subs->interface >= 0) {
1963                 usb_set_interface(subs->dev, subs->interface, 0);
1964                 subs->interface = -1;
1965         }
1966         subs->pcm_substream = NULL;
1967         return 0;
1968 }
1969
1970 static int snd_usb_playback_open(struct snd_pcm_substream *substream)
1971 {
1972         return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
1973 }
1974
1975 static int snd_usb_playback_close(struct snd_pcm_substream *substream)
1976 {
1977         return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
1978 }
1979
1980 static int snd_usb_capture_open(struct snd_pcm_substream *substream)
1981 {
1982         return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
1983 }
1984
1985 static int snd_usb_capture_close(struct snd_pcm_substream *substream)
1986 {
1987         return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
1988 }
1989
1990 static struct snd_pcm_ops snd_usb_playback_ops = {
1991         .open =         snd_usb_playback_open,
1992         .close =        snd_usb_playback_close,
1993         .ioctl =        snd_pcm_lib_ioctl,
1994         .hw_params =    snd_usb_hw_params,
1995         .hw_free =      snd_usb_hw_free,
1996         .prepare =      snd_usb_pcm_prepare,
1997         .trigger =      snd_usb_pcm_playback_trigger,
1998         .pointer =      snd_usb_pcm_pointer,
1999         .page =         snd_pcm_get_vmalloc_page,
2000 };
2001
2002 static struct snd_pcm_ops snd_usb_capture_ops = {
2003         .open =         snd_usb_capture_open,
2004         .close =        snd_usb_capture_close,
2005         .ioctl =        snd_pcm_lib_ioctl,
2006         .hw_params =    snd_usb_hw_params,
2007         .hw_free =      snd_usb_hw_free,
2008         .prepare =      snd_usb_pcm_prepare,
2009         .trigger =      snd_usb_pcm_capture_trigger,
2010         .pointer =      snd_usb_pcm_pointer,
2011         .page =         snd_pcm_get_vmalloc_page,
2012 };
2013
2014
2015
2016 /*
2017  * helper functions
2018  */
2019
2020 /*
2021  * combine bytes and get an integer value
2022  */
2023 unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
2024 {
2025         switch (size) {
2026         case 1:  return *bytes;
2027         case 2:  return combine_word(bytes);
2028         case 3:  return combine_triple(bytes);
2029         case 4:  return combine_quad(bytes);
2030         default: return 0;
2031         }
2032 }
2033
2034 /*
2035  * parse descriptor buffer and return the pointer starting the given
2036  * descriptor type.
2037  */
2038 void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
2039 {
2040         u8 *p, *end, *next;
2041
2042         p = descstart;
2043         end = p + desclen;
2044         for (; p < end;) {
2045                 if (p[0] < 2)
2046                         return NULL;
2047                 next = p + p[0];
2048                 if (next > end)
2049                         return NULL;
2050                 if (p[1] == dtype && (!after || (void *)p > after)) {
2051                         return p;
2052                 }
2053                 p = next;
2054         }
2055         return NULL;
2056 }
2057
2058 /*
2059  * find a class-specified interface descriptor with the given subtype.
2060  */
2061 void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
2062 {
2063         unsigned char *p = after;
2064
2065         while ((p = snd_usb_find_desc(buffer, buflen, p,
2066                                       USB_DT_CS_INTERFACE)) != NULL) {
2067                 if (p[0] >= 3 && p[2] == dsubtype)
2068                         return p;
2069         }
2070         return NULL;
2071 }
2072
2073 /*
2074  * Wrapper for usb_control_msg().
2075  * Allocates a temp buffer to prevent dmaing from/to the stack.
2076  */
2077 int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
2078                     __u8 requesttype, __u16 value, __u16 index, void *data,
2079                     __u16 size, int timeout)
2080 {
2081         int err;
2082         void *buf = NULL;
2083
2084         if (size > 0) {
2085                 buf = kmemdup(data, size, GFP_KERNEL);
2086                 if (!buf)
2087                         return -ENOMEM;
2088         }
2089         err = usb_control_msg(dev, pipe, request, requesttype,
2090                               value, index, buf, size, timeout);
2091         if (size > 0) {
2092                 memcpy(data, buf, size);
2093                 kfree(buf);
2094         }
2095         return err;
2096 }
2097
2098
2099 /*
2100  * entry point for linux usb interface
2101  */
2102
2103 static int usb_audio_probe(struct usb_interface *intf,
2104                            const struct usb_device_id *id);
2105 static void usb_audio_disconnect(struct usb_interface *intf);
2106
2107 #ifdef CONFIG_PM
2108 static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
2109 static int usb_audio_resume(struct usb_interface *intf);
2110 #else
2111 #define usb_audio_suspend NULL
2112 #define usb_audio_resume NULL
2113 #endif
2114
2115 static struct usb_device_id usb_audio_ids [] = {
2116 #include "usbquirks.h"
2117     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
2118       .bInterfaceClass = USB_CLASS_AUDIO,
2119       .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
2120     { }                                         /* Terminating entry */
2121 };
2122
2123 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
2124
2125 static struct usb_driver usb_audio_driver = {
2126         .name =         "snd-usb-audio",
2127         .probe =        usb_audio_probe,
2128         .disconnect =   usb_audio_disconnect,
2129         .suspend =      usb_audio_suspend,
2130         .resume =       usb_audio_resume,
2131         .id_table =     usb_audio_ids,
2132 };
2133
2134
2135 #if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
2136
2137 /*
2138  * proc interface for list the supported pcm formats
2139  */
2140 static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
2141 {
2142         struct list_head *p;
2143         static char *sync_types[4] = {
2144                 "NONE", "ASYNC", "ADAPTIVE", "SYNC"
2145         };
2146
2147         list_for_each(p, &subs->fmt_list) {
2148                 struct audioformat *fp;
2149                 fp = list_entry(p, struct audioformat, list);
2150                 snd_iprintf(buffer, "  Interface %d\n", fp->iface);
2151                 snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
2152                 snd_iprintf(buffer, "    Format: 0x%x\n", fp->format);
2153                 snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
2154                 snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
2155                             fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
2156                             fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
2157                             sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
2158                 if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
2159                         snd_iprintf(buffer, "    Rates: %d - %d (continuous)\n",
2160                                     fp->rate_min, fp->rate_max);
2161                 } else {
2162                         unsigned int i;
2163                         snd_iprintf(buffer, "    Rates: ");
2164                         for (i = 0; i < fp->nr_rates; i++) {
2165                                 if (i > 0)
2166                                         snd_iprintf(buffer, ", ");
2167                                 snd_iprintf(buffer, "%d", fp->rate_table[i]);
2168                         }
2169                         snd_iprintf(buffer, "\n");
2170                 }
2171                 // snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
2172                 // snd_iprintf(buffer, "    EP Attribute = 0x%x\n", fp->attributes);
2173         }
2174 }
2175
2176 static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
2177 {
2178         if (subs->running) {
2179                 unsigned int i;
2180                 snd_iprintf(buffer, "  Status: Running\n");
2181                 snd_iprintf(buffer, "    Interface = %d\n", subs->interface);
2182                 snd_iprintf(buffer, "    Altset = %d\n", subs->format);
2183                 snd_iprintf(buffer, "    URBs = %d [ ", subs->nurbs);
2184                 for (i = 0; i < subs->nurbs; i++)
2185                         snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
2186                 snd_iprintf(buffer, "]\n");
2187                 snd_iprintf(buffer, "    Packet Size = %d\n", subs->curpacksize);
2188                 snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
2189                             snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
2190                             ? get_full_speed_hz(subs->freqm)
2191                             : get_high_speed_hz(subs->freqm),
2192                             subs->freqm >> 16, subs->freqm & 0xffff);
2193         } else {
2194                 snd_iprintf(buffer, "  Status: Stop\n");
2195         }
2196 }
2197
2198 static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
2199 {
2200         struct snd_usb_stream *stream = entry->private_data;
2201
2202         snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
2203
2204         if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
2205                 snd_iprintf(buffer, "\nPlayback:\n");
2206                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2207                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
2208         }
2209         if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
2210                 snd_iprintf(buffer, "\nCapture:\n");
2211                 proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2212                 proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
2213         }
2214 }
2215
2216 static void proc_pcm_format_add(struct snd_usb_stream *stream)
2217 {
2218         struct snd_info_entry *entry;
2219         char name[32];
2220         struct snd_card *card = stream->chip->card;
2221
2222         sprintf(name, "stream%d", stream->pcm_index);
2223         if (! snd_card_proc_new(card, name, &entry))
2224                 snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
2225 }
2226
2227 #else
2228
2229 static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
2230 {
2231 }
2232
2233 #endif
2234
2235 /*
2236  * initialize the substream instance.
2237  */
2238
2239 static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
2240 {
2241         struct snd_usb_substream *subs = &as->substream[stream];
2242
2243         INIT_LIST_HEAD(&subs->fmt_list);
2244         spin_lock_init(&subs->lock);
2245
2246         subs->stream = as;
2247         subs->direction = stream;
2248         subs->dev = as->chip->dev;
2249         if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) {
2250                 subs->ops = audio_urb_ops[stream];
2251         } else {
2252                 subs->ops = audio_urb_ops_high_speed[stream];
2253                 switch (as->chip->usb_id) {
2254                 case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
2255                 case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
2256                         subs->ops.retire_sync = retire_playback_sync_urb_hs_emu;
2257                         break;
2258                 }
2259         }
2260         snd_pcm_set_ops(as->pcm, stream,
2261                         stream == SNDRV_PCM_STREAM_PLAYBACK ?
2262                         &snd_usb_playback_ops : &snd_usb_capture_ops);
2263
2264         list_add_tail(&fp->list, &subs->fmt_list);
2265         subs->formats |= 1ULL << fp->format;
2266         subs->endpoint = fp->endpoint;
2267         subs->num_formats++;
2268         subs->fmt_type = fp->fmt_type;
2269 }
2270
2271
2272 /*
2273  * free a substream
2274  */
2275 static void free_substream(struct snd_usb_substream *subs)
2276 {
2277         struct list_head *p, *n;
2278
2279         if (! subs->num_formats)
2280                 return; /* not initialized */
2281         list_for_each_safe(p, n, &subs->fmt_list) {
2282                 struct audioformat *fp = list_entry(p, struct audioformat, list);
2283                 kfree(fp->rate_table);
2284                 kfree(fp);
2285         }
2286         kfree(subs->rate_list.list);
2287 }
2288
2289
2290 /*
2291  * free a usb stream instance
2292  */
2293 static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
2294 {
2295         free_substream(&stream->substream[0]);
2296         free_substream(&stream->substream[1]);
2297         list_del(&stream->list);
2298         kfree(stream);
2299 }
2300
2301 static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
2302 {
2303         struct snd_usb_stream *stream = pcm->private_data;
2304         if (stream) {
2305                 stream->pcm = NULL;
2306                 snd_usb_audio_stream_free(stream);
2307         }
2308 }
2309
2310
2311 /*
2312  * add this endpoint to the chip instance.
2313  * if a stream with the same endpoint already exists, append to it.
2314  * if not, create a new pcm stream.
2315  */
2316 static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
2317 {
2318         struct list_head *p;
2319         struct snd_usb_stream *as;
2320         struct snd_usb_substream *subs;
2321         struct snd_pcm *pcm;
2322         int err;
2323
2324         list_for_each(p, &chip->pcm_list) {
2325                 as = list_entry(p, struct snd_usb_stream, list);
2326                 if (as->fmt_type != fp->fmt_type)
2327                         continue;
2328                 subs = &as->substream[stream];
2329                 if (! subs->endpoint)
2330                         continue;
2331                 if (subs->endpoint == fp->endpoint) {
2332                         list_add_tail(&fp->list, &subs->fmt_list);
2333                         subs->num_formats++;
2334                         subs->formats |= 1ULL << fp->format;
2335                         return 0;
2336                 }
2337         }
2338         /* look for an empty stream */
2339         list_for_each(p, &chip->pcm_list) {
2340                 as = list_entry(p, struct snd_usb_stream, list);
2341                 if (as->fmt_type != fp->fmt_type)
2342                         continue;
2343                 subs = &as->substream[stream];
2344                 if (subs->endpoint)
2345                         continue;
2346                 err = snd_pcm_new_stream(as->pcm, stream, 1);
2347                 if (err < 0)
2348                         return err;
2349                 init_substream(as, stream, fp);
2350                 return 0;
2351         }
2352
2353         /* create a new pcm */
2354         as = kzalloc(sizeof(*as), GFP_KERNEL);
2355         if (! as)
2356                 return -ENOMEM;
2357         as->pcm_index = chip->pcm_devs;
2358         as->chip = chip;
2359         as->fmt_type = fp->fmt_type;
2360         err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
2361                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
2362                           stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
2363                           &pcm);
2364         if (err < 0) {
2365                 kfree(as);
2366                 return err;
2367         }
2368         as->pcm = pcm;
2369         pcm->private_data = as;
2370         pcm->private_free = snd_usb_audio_pcm_free;
2371         pcm->info_flags = 0;
2372         if (chip->pcm_devs > 0)
2373                 sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
2374         else
2375                 strcpy(pcm->name, "USB Audio");
2376
2377         init_substream(as, stream, fp);
2378
2379         list_add(&as->list, &chip->pcm_list);
2380         chip->pcm_devs++;
2381
2382         proc_pcm_format_add(as);
2383
2384         return 0;
2385 }
2386
2387
2388 /*
2389  * check if the device uses big-endian samples
2390  */
2391 static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
2392 {
2393         switch (chip->usb_id) {
2394         case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
2395                 if (fp->endpoint & USB_DIR_IN)
2396                         return 1;
2397                 break;
2398         case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2399                 if (device_setup[chip->index] == 0x00 ||
2400                     fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
2401                         return 1;
2402         }
2403         return 0;
2404 }
2405
2406 /*
2407  * parse the audio format type I descriptor
2408  * and returns the corresponding pcm format
2409  *
2410  * @dev: usb device
2411  * @fp: audioformat record
2412  * @format: the format tag (wFormatTag)
2413  * @fmt: the format type descriptor
2414  */
2415 static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
2416                                      int format, unsigned char *fmt)
2417 {
2418         int pcm_format;
2419         int sample_width, sample_bytes;
2420
2421         /* FIXME: correct endianess and sign? */
2422         pcm_format = -1;
2423         sample_width = fmt[6];
2424         sample_bytes = fmt[5];
2425         switch (format) {
2426         case 0: /* some devices don't define this correctly... */
2427                 snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
2428                             chip->dev->devnum, fp->iface, fp->altsetting);
2429                 /* fall-through */
2430         case USB_AUDIO_FORMAT_PCM:
2431                 if (sample_width > sample_bytes * 8) {
2432                         snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
2433                                    chip->dev->devnum, fp->iface, fp->altsetting,
2434                                    sample_width, sample_bytes);
2435                 }
2436                 /* check the format byte size */
2437                 switch (fmt[5]) {
2438                 case 1:
2439                         pcm_format = SNDRV_PCM_FORMAT_S8;
2440                         break;
2441                 case 2:
2442                         if (is_big_endian_format(chip, fp))
2443                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
2444                         else
2445                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2446                         break;
2447                 case 3:
2448                         if (is_big_endian_format(chip, fp))
2449                                 pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
2450                         else
2451                                 pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
2452                         break;
2453                 case 4:
2454                         pcm_format = SNDRV_PCM_FORMAT_S32_LE;
2455                         break;
2456                 default:
2457                         snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
2458                                    chip->dev->devnum, fp->iface,
2459                                    fp->altsetting, sample_width, sample_bytes);
2460                         break;
2461                 }
2462                 break;
2463         case USB_AUDIO_FORMAT_PCM8:
2464                 /* Dallas DS4201 workaround */
2465                 if (chip->usb_id == USB_ID(0x04fa, 0x4201))
2466                         pcm_format = SNDRV_PCM_FORMAT_S8;
2467                 else
2468                         pcm_format = SNDRV_PCM_FORMAT_U8;
2469                 break;
2470         case USB_AUDIO_FORMAT_IEEE_FLOAT:
2471                 pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
2472                 break;
2473         case USB_AUDIO_FORMAT_ALAW:
2474                 pcm_format = SNDRV_PCM_FORMAT_A_LAW;
2475                 break;
2476         case USB_AUDIO_FORMAT_MU_LAW:
2477                 pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
2478                 break;
2479         default:
2480                 snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
2481                            chip->dev->devnum, fp->iface, fp->altsetting, format);
2482                 break;
2483         }
2484         return pcm_format;
2485 }
2486
2487
2488 /*
2489  * parse the format descriptor and stores the possible sample rates
2490  * on the audioformat table.
2491  *
2492  * @dev: usb device
2493  * @fp: audioformat record
2494  * @fmt: the format descriptor
2495  * @offset: the start offset of descriptor pointing the rate type
2496  *          (7 for type I and II, 8 for type II)
2497  */
2498 static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
2499                                     unsigned char *fmt, int offset)
2500 {
2501         int nr_rates = fmt[offset];
2502
2503         if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
2504                 snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2505                                    chip->dev->devnum, fp->iface, fp->altsetting);
2506                 return -1;
2507         }
2508
2509         if (nr_rates) {
2510                 /*
2511                  * build the rate table and bitmap flags
2512                  */
2513                 int r, idx;
2514                 unsigned int nonzero_rates = 0;
2515
2516                 fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
2517                 if (fp->rate_table == NULL) {
2518                         snd_printk(KERN_ERR "cannot malloc\n");
2519                         return -1;
2520                 }
2521
2522                 fp->nr_rates = nr_rates;
2523                 fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
2524                 for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
2525                         unsigned int rate = combine_triple(&fmt[idx]);
2526                         /* C-Media CM6501 mislabels its 96 kHz altsetting */
2527                         if (rate == 48000 && nr_rates == 1 &&
2528                             chip->usb_id == USB_ID(0x0d8c, 0x0201) &&
2529                             fp->altsetting == 5 && fp->maxpacksize == 392)
2530                                 rate = 96000;
2531                         fp->rate_table[r] = rate;
2532                         nonzero_rates |= rate;
2533                         if (rate < fp->rate_min)
2534                                 fp->rate_min = rate;
2535                         else if (rate > fp->rate_max)
2536                                 fp->rate_max = rate;
2537                         fp->rates |= snd_pcm_rate_to_rate_bit(rate);
2538                 }
2539                 if (!nonzero_rates) {
2540                         hwc_debug("All rates were zero. Skipping format!\n");
2541                         return -1;
2542                 }
2543         } else {
2544                 /* continuous rates */
2545                 fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
2546                 fp->rate_min = combine_triple(&fmt[offset + 1]);
2547                 fp->rate_max = combine_triple(&fmt[offset + 4]);
2548         }
2549         return 0;
2550 }
2551
2552 /*
2553  * parse the format type I and III descriptors
2554  */
2555 static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
2556                                 int format, unsigned char *fmt)
2557 {
2558         int pcm_format;
2559
2560         if (fmt[3] == USB_FORMAT_TYPE_III) {
2561                 /* FIXME: the format type is really IECxxx
2562                  *        but we give normal PCM format to get the existing
2563                  *        apps working...
2564                  */
2565                 switch (chip->usb_id) {
2566
2567                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2568                         if (device_setup[chip->index] == 0x00 && 
2569                             fp->altsetting == 6)
2570                                 pcm_format = SNDRV_PCM_FORMAT_S16_BE;
2571                         else
2572                                 pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2573                         break;
2574                 default:
2575                         pcm_format = SNDRV_PCM_FORMAT_S16_LE;
2576                 }
2577         } else {
2578                 pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
2579                 if (pcm_format < 0)
2580                         return -1;
2581         }
2582         fp->format = pcm_format;
2583         fp->channels = fmt[4];
2584         if (fp->channels < 1) {
2585                 snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
2586                            chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
2587                 return -1;
2588         }
2589         return parse_audio_format_rates(chip, fp, fmt, 7);
2590 }
2591
2592 /*
2593  * prase the format type II descriptor
2594  */
2595 static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
2596                                  int format, unsigned char *fmt)
2597 {
2598         int brate, framesize;
2599         switch (format) {
2600         case USB_AUDIO_FORMAT_AC3:
2601                 /* FIXME: there is no AC3 format defined yet */
2602                 // fp->format = SNDRV_PCM_FORMAT_AC3;
2603                 fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
2604                 break;
2605         case USB_AUDIO_FORMAT_MPEG:
2606                 fp->format = SNDRV_PCM_FORMAT_MPEG;
2607                 break;
2608         default:
2609                 snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected.  processed as MPEG.\n",
2610                            chip->dev->devnum, fp->iface, fp->altsetting, format);
2611                 fp->format = SNDRV_PCM_FORMAT_MPEG;
2612                 break;
2613         }
2614         fp->channels = 1;
2615         brate = combine_word(&fmt[4]);  /* fmt[4,5] : wMaxBitRate (in kbps) */
2616         framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
2617         snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
2618         fp->frame_size = framesize;
2619         return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
2620 }
2621
2622 static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
2623                               int format, unsigned char *fmt, int stream)
2624 {
2625         int err;
2626
2627         switch (fmt[3]) {
2628         case USB_FORMAT_TYPE_I:
2629         case USB_FORMAT_TYPE_III:
2630                 err = parse_audio_format_i(chip, fp, format, fmt);
2631                 break;
2632         case USB_FORMAT_TYPE_II:
2633                 err = parse_audio_format_ii(chip, fp, format, fmt);
2634                 break;
2635         default:
2636                 snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
2637                            chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
2638                 return -1;
2639         }
2640         fp->fmt_type = fmt[3];
2641         if (err < 0)
2642                 return err;
2643 #if 1
2644         /* FIXME: temporary hack for extigy/audigy 2 nx/zs */
2645         /* extigy apparently supports sample rates other than 48k
2646          * but not in ordinary way.  so we enable only 48k atm.
2647          */
2648         if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
2649             chip->usb_id == USB_ID(0x041e, 0x3020) ||
2650             chip->usb_id == USB_ID(0x041e, 0x3061)) {
2651                 if (fmt[3] == USB_FORMAT_TYPE_I &&
2652                     fp->rates != SNDRV_PCM_RATE_48000 &&
2653                     fp->rates != SNDRV_PCM_RATE_96000)
2654                         return -1;
2655         }
2656 #endif
2657         return 0;
2658 }
2659
2660 static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
2661                                          int iface, int altno);
2662 static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
2663 {
2664         struct usb_device *dev;
2665         struct usb_interface *iface;
2666         struct usb_host_interface *alts;
2667         struct usb_interface_descriptor *altsd;
2668         int i, altno, err, stream;
2669         int format;
2670         struct audioformat *fp;
2671         unsigned char *fmt, *csep;
2672
2673         dev = chip->dev;
2674
2675         /* parse the interface's altsettings */
2676         iface = usb_ifnum_to_if(dev, iface_no);
2677         for (i = 0; i < iface->num_altsetting; i++) {
2678                 alts = &iface->altsetting[i];
2679                 altsd = get_iface_desc(alts);
2680                 /* skip invalid one */
2681                 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2682                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2683                     (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
2684                      altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
2685                     altsd->bNumEndpoints < 1 ||
2686                     le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
2687                         continue;
2688                 /* must be isochronous */
2689                 if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
2690                     USB_ENDPOINT_XFER_ISOC)
2691                         continue;
2692                 /* check direction */
2693                 stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
2694                         SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2695                 altno = altsd->bAlternateSetting;
2696         
2697                 /* audiophile usb: skip altsets incompatible with device_setup
2698                  */
2699                 if (chip->usb_id == USB_ID(0x0763, 0x2003) && 
2700                     audiophile_skip_setting_quirk(chip, iface_no, altno))
2701                         continue;
2702
2703                 /* get audio formats */
2704                 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
2705                 if (!fmt) {
2706                         snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
2707                                    dev->devnum, iface_no, altno);
2708                         continue;
2709                 }
2710
2711                 if (fmt[0] < 7) {
2712                         snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
2713                                    dev->devnum, iface_no, altno);
2714                         continue;
2715                 }
2716
2717                 format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
2718
2719                 /* get format type */
2720                 fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
2721                 if (!fmt) {
2722                         snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
2723                                    dev->devnum, iface_no, altno);
2724                         continue;
2725                 }
2726                 if (fmt[0] < 8) {
2727                         snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
2728                                    dev->devnum, iface_no, altno);
2729                         continue;
2730                 }
2731
2732                 csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
2733                 /* Creamware Noah has this descriptor after the 2nd endpoint */
2734                 if (!csep && altsd->bNumEndpoints >= 2)
2735                         csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
2736                 if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
2737                         snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
2738                                    " class specific endpoint descriptor\n",
2739                                    dev->devnum, iface_no, altno);
2740                         csep = NULL;
2741                 }
2742
2743                 fp = kzalloc(sizeof(*fp), GFP_KERNEL);
2744                 if (! fp) {
2745                         snd_printk(KERN_ERR "cannot malloc\n");
2746                         return -ENOMEM;
2747                 }
2748
2749                 fp->iface = iface_no;
2750                 fp->altsetting = altno;
2751                 fp->altset_idx = i;
2752                 fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
2753                 fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
2754                 fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
2755                 if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
2756                         fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
2757                                         * (fp->maxpacksize & 0x7ff);
2758                 fp->attributes = csep ? csep[3] : 0;
2759
2760                 /* some quirks for attributes here */
2761
2762                 switch (chip->usb_id) {
2763                 case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
2764                         /* Optoplay sets the sample rate attribute although
2765                          * it seems not supporting it in fact.
2766                          */
2767                         fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
2768                         break;
2769                 case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
2770                 case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
2771                         /* doesn't set the sample rate attribute, but supports it */
2772                         fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
2773                         break;
2774                 case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
2775                 case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
2776                                                 an older model 77d:223) */
2777                 /*
2778                  * plantronics headset and Griffin iMic have set adaptive-in
2779                  * although it's really not...
2780                  */
2781                         fp->ep_attr &= ~EP_ATTR_MASK;
2782                         if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2783                                 fp->ep_attr |= EP_ATTR_ADAPTIVE;
2784                         else
2785                                 fp->ep_attr |= EP_ATTR_SYNC;
2786                         break;
2787                 }
2788
2789                 /* ok, let's parse further... */
2790                 if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
2791                         kfree(fp->rate_table);
2792                         kfree(fp);
2793                         continue;
2794                 }
2795
2796                 snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, altno, fp->endpoint);
2797                 err = add_audio_endpoint(chip, stream, fp);
2798                 if (err < 0) {
2799                         kfree(fp->rate_table);
2800                         kfree(fp);
2801                         return err;
2802                 }
2803                 /* try to set the interface... */
2804                 usb_set_interface(chip->dev, iface_no, altno);
2805                 init_usb_pitch(chip->dev, iface_no, alts, fp);
2806                 init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
2807         }
2808         return 0;
2809 }
2810
2811
2812 /*
2813  * disconnect streams
2814  * called from snd_usb_audio_disconnect()
2815  */
2816 static void snd_usb_stream_disconnect(struct list_head *head)
2817 {
2818         int idx;
2819         struct snd_usb_stream *as;
2820         struct snd_usb_substream *subs;
2821
2822         as = list_entry(head, struct snd_usb_stream, list);
2823         for (idx = 0; idx < 2; idx++) {
2824                 subs = &as->substream[idx];
2825                 if (!subs->num_formats)
2826                         return;
2827                 release_substream_urbs(subs, 1);
2828                 subs->interface = -1;
2829         }
2830 }
2831
2832 /*
2833  * parse audio control descriptor and create pcm/midi streams
2834  */
2835 static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
2836 {
2837         struct usb_device *dev = chip->dev;
2838         struct usb_host_interface *host_iface;
2839         struct usb_interface *iface;
2840         unsigned char *p1;
2841         int i, j;
2842
2843         /* find audiocontrol interface */
2844         host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
2845         if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
2846                 snd_printk(KERN_ERR "cannot find HEADER\n");
2847                 return -EINVAL;
2848         }
2849         if (! p1[7] || p1[0] < 8 + p1[7]) {
2850                 snd_printk(KERN_ERR "invalid HEADER\n");
2851                 return -EINVAL;
2852         }
2853
2854         /*
2855          * parse all USB audio streaming interfaces
2856          */
2857         for (i = 0; i < p1[7]; i++) {
2858                 struct usb_host_interface *alts;
2859                 struct usb_interface_descriptor *altsd;
2860                 j = p1[8 + i];
2861                 iface = usb_ifnum_to_if(dev, j);
2862                 if (!iface) {
2863                         snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
2864                                    dev->devnum, ctrlif, j);
2865                         continue;
2866                 }
2867                 if (usb_interface_claimed(iface)) {
2868                         snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
2869                         continue;
2870                 }
2871                 alts = &iface->altsetting[0];
2872                 altsd = get_iface_desc(alts);
2873                 if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
2874                      altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
2875                     altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
2876                         if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
2877                                 snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
2878                                 continue;
2879                         }
2880                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2881                         continue;
2882                 }
2883                 if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
2884                      altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
2885                     altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
2886                         snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
2887                         /* skip non-supported classes */
2888                         continue;
2889                 }
2890                 if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
2891                         snd_printk(KERN_ERR "low speed audio streaming not supported\n");
2892                         continue;
2893                 }
2894                 if (! parse_audio_endpoints(chip, j)) {
2895                         usb_set_interface(dev, j, 0); /* reset the current interface */
2896                         usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
2897                 }
2898         }
2899
2900         return 0;
2901 }
2902
2903 /*
2904  * create a stream for an endpoint/altsetting without proper descriptors
2905  */
2906 static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
2907                                      struct usb_interface *iface,
2908                                      const struct snd_usb_audio_quirk *quirk)
2909 {
2910         struct audioformat *fp;
2911         struct usb_host_interface *alts;
2912         int stream, err;
2913         unsigned *rate_table = NULL;
2914
2915         fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
2916         if (! fp) {
2917                 snd_printk(KERN_ERR "cannot memdup\n");
2918                 return -ENOMEM;
2919         }
2920         if (fp->nr_rates > 0) {
2921                 rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
2922                 if (!rate_table) {
2923                         kfree(fp);
2924                         return -ENOMEM;
2925                 }
2926                 memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
2927                 fp->rate_table = rate_table;
2928         }
2929
2930         stream = (fp->endpoint & USB_DIR_IN)
2931                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
2932         err = add_audio_endpoint(chip, stream, fp);
2933         if (err < 0) {
2934                 kfree(fp);
2935                 kfree(rate_table);
2936                 return err;
2937         }
2938         if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
2939             fp->altset_idx >= iface->num_altsetting) {
2940                 kfree(fp);
2941                 kfree(rate_table);
2942                 return -EINVAL;
2943         }
2944         alts = &iface->altsetting[fp->altset_idx];
2945         usb_set_interface(chip->dev, fp->iface, 0);
2946         init_usb_pitch(chip->dev, fp->iface, alts, fp);
2947         init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
2948         return 0;
2949 }
2950
2951 /*
2952  * create a stream for an interface with proper descriptors
2953  */
2954 static int create_standard_audio_quirk(struct snd_usb_audio *chip,
2955                                        struct usb_interface *iface,
2956                                        const struct snd_usb_audio_quirk *quirk)
2957 {
2958         struct usb_host_interface *alts;
2959         struct usb_interface_descriptor *altsd;
2960         int err;
2961
2962         alts = &iface->altsetting[0];
2963         altsd = get_iface_desc(alts);
2964         err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
2965         if (err < 0) {
2966                 snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
2967                            altsd->bInterfaceNumber, err);
2968                 return err;
2969         }
2970         /* reset the current interface */
2971         usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
2972         return 0;
2973 }
2974
2975 /*
2976  * Create a stream for an Edirol UA-700/UA-25 interface.  The only way
2977  * to detect the sample rate is by looking at wMaxPacketSize.
2978  */
2979 static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
2980                                    struct usb_interface *iface,
2981                                    const struct snd_usb_audio_quirk *quirk)
2982 {
2983         static const struct audioformat ua_format = {
2984                 .format = SNDRV_PCM_FORMAT_S24_3LE,
2985                 .channels = 2,
2986                 .fmt_type = USB_FORMAT_TYPE_I,
2987                 .altsetting = 1,
2988                 .altset_idx = 1,
2989                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
2990         };
2991         struct usb_host_interface *alts;
2992         struct usb_interface_descriptor *altsd;
2993         struct audioformat *fp;
2994         int stream, err;
2995
2996         /* both PCM and MIDI interfaces have 2 altsettings */
2997         if (iface->num_altsetting != 2)
2998                 return -ENXIO;
2999         alts = &iface->altsetting[1];
3000         altsd = get_iface_desc(alts);
3001
3002         if (altsd->bNumEndpoints == 2) {
3003                 static const struct snd_usb_midi_endpoint_info ua700_ep = {
3004                         .out_cables = 0x0003,
3005                         .in_cables  = 0x0003
3006                 };
3007                 static const struct snd_usb_audio_quirk ua700_quirk = {
3008                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
3009                         .data = &ua700_ep
3010                 };
3011                 static const struct snd_usb_midi_endpoint_info ua25_ep = {
3012                         .out_cables = 0x0001,
3013                         .in_cables  = 0x0001
3014                 };
3015                 static const struct snd_usb_audio_quirk ua25_quirk = {
3016                         .type = QUIRK_MIDI_FIXED_ENDPOINT,
3017                         .data = &ua25_ep
3018                 };
3019                 if (chip->usb_id == USB_ID(0x0582, 0x002b))
3020                         return snd_usb_create_midi_interface(chip, iface,
3021                                                              &ua700_quirk);
3022                 else
3023                         return snd_usb_create_midi_interface(chip, iface,
3024                                                              &ua25_quirk);
3025         }
3026
3027         if (altsd->bNumEndpoints != 1)
3028                 return -ENXIO;
3029
3030         fp = kmalloc(sizeof(*fp), GFP_KERNEL);
3031         if (!fp)
3032                 return -ENOMEM;
3033         memcpy(fp, &ua_format, sizeof(*fp));
3034
3035         fp->iface = altsd->bInterfaceNumber;
3036         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3037         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3038         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3039
3040         switch (fp->maxpacksize) {
3041         case 0x120:
3042                 fp->rate_max = fp->rate_min = 44100;
3043                 break;
3044         case 0x138:
3045         case 0x140:
3046                 fp->rate_max = fp->rate_min = 48000;
3047                 break;
3048         case 0x258:
3049         case 0x260:
3050                 fp->rate_max = fp->rate_min = 96000;
3051                 break;
3052         default:
3053                 snd_printk(KERN_ERR "unknown sample rate\n");
3054                 kfree(fp);
3055                 return -ENXIO;
3056         }
3057
3058         stream = (fp->endpoint & USB_DIR_IN)
3059                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3060         err = add_audio_endpoint(chip, stream, fp);
3061         if (err < 0) {
3062                 kfree(fp);
3063                 return err;
3064         }
3065         usb_set_interface(chip->dev, fp->iface, 0);
3066         return 0;
3067 }
3068
3069 /*
3070  * Create a stream for an Edirol UA-1000 interface.
3071  */
3072 static int create_ua1000_quirk(struct snd_usb_audio *chip,
3073                                struct usb_interface *iface,
3074                                const struct snd_usb_audio_quirk *quirk)
3075 {
3076         static const struct audioformat ua1000_format = {
3077                 .format = SNDRV_PCM_FORMAT_S32_LE,
3078                 .fmt_type = USB_FORMAT_TYPE_I,
3079                 .altsetting = 1,
3080                 .altset_idx = 1,
3081                 .attributes = 0,
3082                 .rates = SNDRV_PCM_RATE_CONTINUOUS,
3083         };
3084         struct usb_host_interface *alts;
3085         struct usb_interface_descriptor *altsd;
3086         struct audioformat *fp;
3087         int stream, err;
3088
3089         if (iface->num_altsetting != 2)
3090                 return -ENXIO;
3091         alts = &iface->altsetting[1];
3092         altsd = get_iface_desc(alts);
3093         if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
3094             altsd->bNumEndpoints != 1)
3095                 return -ENXIO;
3096
3097         fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
3098         if (!fp)
3099                 return -ENOMEM;
3100
3101         fp->channels = alts->extra[4];
3102         fp->iface = altsd->bInterfaceNumber;
3103         fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
3104         fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
3105         fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
3106         fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
3107
3108         stream = (fp->endpoint & USB_DIR_IN)
3109                 ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
3110         err = add_audio_endpoint(chip, stream, fp);
3111         if (err < 0) {
3112                 kfree(fp);
3113                 return err;
3114         }
3115         /* FIXME: playback must be synchronized to capture */
3116         usb_set_interface(chip->dev, fp->iface, 0);
3117         return 0;
3118 }
3119
3120 /*