[ALSA] Remove xxx_t typedefs: USB-USX2Y
[linux-2.6.git] / sound / usb / usx2y / usbusx2yaudio.c
1 /*
2  *   US-X2Y AUDIO
3  *   Copyright (c) 2002-2004 by Karsten Wiese
4  *
5  *   based on
6  *
7  *   (Tentative) USB Audio Driver for ALSA
8  *
9  *   Main and PCM part
10  *
11  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
12  *
13  *   Many codes borrowed from audio.c by 
14  *          Alan Cox (alan@lxorguk.ukuu.org.uk)
15  *          Thomas Sailer (sailer@ife.ee.ethz.ch)
16  *
17  *
18  *   This program is free software; you can redistribute it and/or modify
19  *   it under the terms of the GNU General Public License as published by
20  *   the Free Software Foundation; either version 2 of the License, or
21  *   (at your option) any later version.
22  *
23  *   This program is distributed in the hope that it will be useful,
24  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
25  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
26  *   GNU General Public License for more details.
27  *
28  *   You should have received a copy of the GNU General Public License
29  *   along with this program; if not, write to the Free Software
30  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
31  */
32
33
34 #include <sound/driver.h>
35 #include <linux/interrupt.h>
36 #include <linux/usb.h>
37 #include <sound/core.h>
38 #include <sound/info.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include "usx2y.h"
42 #include "usbusx2y.h"
43
44 #define USX2Y_NRPACKS 4                 /* Default value used for nr of packs per urb.
45                                           1 to 4 have been tested ok on uhci.
46                                           To use 3 on ohci, you'd need a patch:
47                                           look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
48                                           "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
49                                           .
50                                           1, 2 and 4 work out of the box on ohci, if I recall correctly.
51                                           Bigger is safer operation,
52                                           smaller gives lower latencies.
53                                         */
54 #define USX2Y_NRPACKS_VARIABLE y        /* If your system works ok with this module's parameter
55                                            nrpacks set to 1, you might as well comment 
56                                            this #define out, and thereby produce smaller, faster code.
57                                            You'd also set USX2Y_NRPACKS to 1 then.
58                                         */
59
60 #ifdef USX2Y_NRPACKS_VARIABLE
61  static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
62  #define  nr_of_packs() nrpacks
63  module_param(nrpacks, int, 0444);
64  MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
65 #else
66  #define nr_of_packs() USX2Y_NRPACKS
67 #endif
68
69
70 static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
71 {
72         struct urb      *urb = subs->completed_urb;
73         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
74         unsigned char   *cp;
75         int             i, len, lens = 0, hwptr_done = subs->hwptr_done;
76         struct usX2Ydev *usX2Y = subs->usX2Y;
77
78         for (i = 0; i < nr_of_packs(); i++) {
79                 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
80                 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
81                         snd_printk(KERN_ERR "active frame status %i. "
82                                    "Most propably some hardware problem.\n",
83                                    urb->iso_frame_desc[i].status);
84                         return urb->iso_frame_desc[i].status;
85                 }
86                 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
87                 if (! len) {
88                         snd_printd("0 == len ERROR!\n");
89                         continue;
90                 }
91
92                 /* copy a data chunk */
93                 if ((hwptr_done + len) > runtime->buffer_size) {
94                         int cnt = runtime->buffer_size - hwptr_done;
95                         int blen = cnt * usX2Y->stride;
96                         memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
97                         memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
98                 } else {
99                         memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
100                                len * usX2Y->stride);
101                 }
102                 lens += len;
103                 if ((hwptr_done += len) >= runtime->buffer_size)
104                         hwptr_done -= runtime->buffer_size;
105         }
106
107         subs->hwptr_done = hwptr_done;
108         subs->transfer_done += lens;
109         /* update the pointer, call callback if necessary */
110         if (subs->transfer_done >= runtime->period_size) {
111                 subs->transfer_done -= runtime->period_size;
112                 snd_pcm_period_elapsed(subs->pcm_substream);
113         }
114         return 0;
115 }
116 /*
117  * prepare urb for playback data pipe
118  *
119  * we copy the data directly from the pcm buffer.
120  * the current position to be copied is held in hwptr field.
121  * since a urb can handle only a single linear buffer, if the total
122  * transferred area overflows the buffer boundary, we cannot send
123  * it directly from the buffer.  thus the data is once copied to
124  * a temporary buffer and urb points to that.
125  */
126 static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
127                                   struct urb *cap_urb,
128                                   struct urb *urb)
129 {
130         int count, counts, pack;
131         struct usX2Ydev *usX2Y = subs->usX2Y;
132         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
133
134         count = 0;
135         for (pack = 0; pack <  nr_of_packs(); pack++) {
136                 /* calculate the size of a packet */
137                 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
138                 count += counts;
139                 if (counts < 43 || counts > 50) {
140                         snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
141                         return -EPIPE;
142                 }
143                 /* set up descriptor */
144                 urb->iso_frame_desc[pack].offset = pack ?
145                         urb->iso_frame_desc[pack - 1].offset +
146                         urb->iso_frame_desc[pack - 1].length :
147                         0;
148                 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
149         }
150         if (atomic_read(&subs->state) >= state_PRERUNNING)
151                 if (subs->hwptr + count > runtime->buffer_size) {
152                         /* err, the transferred area goes over buffer boundary.
153                          * copy the data to the temp buffer.
154                          */
155                         int len;
156                         len = runtime->buffer_size - subs->hwptr;
157                         urb->transfer_buffer = subs->tmpbuf;
158                         memcpy(subs->tmpbuf, runtime->dma_area +
159                                subs->hwptr * usX2Y->stride, len * usX2Y->stride);
160                         memcpy(subs->tmpbuf + len * usX2Y->stride,
161                                runtime->dma_area, (count - len) * usX2Y->stride);
162                         subs->hwptr += count;
163                         subs->hwptr -= runtime->buffer_size;
164                 } else {
165                         /* set the buffer pointer */
166                         urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
167                         if ((subs->hwptr += count) >= runtime->buffer_size)
168                         subs->hwptr -= runtime->buffer_size;                    
169                 }
170         else
171                 urb->transfer_buffer = subs->tmpbuf;
172         urb->transfer_buffer_length = count * usX2Y->stride;
173         return 0;
174 }
175
176 /*
177  * process after playback data complete
178  *
179  * update the current position and call callback if a period is processed.
180  */
181 static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
182 {
183         struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
184         int             len = urb->actual_length / subs->usX2Y->stride;
185
186         subs->transfer_done += len;
187         subs->hwptr_done +=  len;
188         if (subs->hwptr_done >= runtime->buffer_size)
189                 subs->hwptr_done -= runtime->buffer_size;
190         if (subs->transfer_done >= runtime->period_size) {
191                 subs->transfer_done -= runtime->period_size;
192                 snd_pcm_period_elapsed(subs->pcm_substream);
193         }
194 }
195
196 static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
197 {
198         int err;
199         if (!urb)
200                 return -ENODEV;
201         urb->start_frame = (frame + NRURBS * nr_of_packs());  // let hcd do rollover sanity checks
202         urb->hcpriv = NULL;
203         urb->dev = subs->usX2Y->chip.dev; /* we need to set this at each time */
204         if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
205                 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
206                 return err;
207         }
208         return 0;
209 }
210
211 static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
212                                           struct snd_usX2Y_substream *playbacksubs,
213                                           int frame)
214 {
215         int err, state;
216         struct urb *urb = playbacksubs->completed_urb;
217
218         state = atomic_read(&playbacksubs->state);
219         if (NULL != urb) {
220                 if (state == state_RUNNING)
221                         usX2Y_urb_play_retire(playbacksubs, urb);
222                 else if (state >= state_PRERUNNING)
223                         atomic_inc(&playbacksubs->state);
224         } else {
225                 switch (state) {
226                 case state_STARTING1:
227                         urb = playbacksubs->urb[0];
228                         atomic_inc(&playbacksubs->state);
229                         break;
230                 case state_STARTING2:
231                         urb = playbacksubs->urb[1];
232                         atomic_inc(&playbacksubs->state);
233                         break;
234                 }
235         }
236         if (urb) {
237                 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
238                     (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
239                         return err;
240                 }
241         }
242
243         playbacksubs->completed_urb = NULL;
244
245         state = atomic_read(&capsubs->state);
246         if (state >= state_PREPARED) {
247                 if (state == state_RUNNING) {
248                         if ((err = usX2Y_urb_capt_retire(capsubs)))
249                                 return err;
250                 } else if (state >= state_PRERUNNING)
251                         atomic_inc(&capsubs->state);
252                 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
253                         return err;
254         }
255         capsubs->completed_urb = NULL;
256         return 0;
257 }
258
259
260 static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
261 {
262         int s, u;
263
264         for (s = 0; s < 4; s++) {
265                 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
266                 if (subs) {
267                         snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
268                         atomic_set(&subs->state, state_STOPPED);
269                 }
270         }
271         for (s = 0; s < 4; s++) {
272                 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
273                 if (subs) {
274                         if (atomic_read(&subs->state) >= state_PRERUNNING) {
275                                 snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
276                         }
277                         for (u = 0; u < NRURBS; u++) {
278                                 struct urb *urb = subs->urb[u];
279                                 if (NULL != urb)
280                                         snd_printdd("%i status=%i start_frame=%i\n",
281                                                     u, urb->status, urb->start_frame);
282                         }
283                 }
284         }
285         usX2Y->prepare_subs = NULL;
286         wake_up(&usX2Y->prepare_wait_queue);
287 }
288
289 static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
290                                    struct snd_usX2Y_substream *subs, struct urb *urb)
291 {
292         snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
293         urb->status = 0;
294         usX2Y_clients_stop(usX2Y);
295 }
296
297 static void usX2Y_error_sequence(struct usX2Ydev *usX2Y,
298                                  struct snd_usX2Y_substream *subs, struct urb *urb)
299 {
300         snd_printk(KERN_ERR "Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
301                    KERN_ERR "Most propably some urb of usb-frame %i is still missing.\n"
302                    KERN_ERR "Cause could be too long delays in usb-hcd interrupt handling.\n",
303                    usb_get_current_frame_number(usX2Y->chip.dev),
304                    subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
305                    usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame);
306         usX2Y_clients_stop(usX2Y);
307 }
308
309 static void i_usX2Y_urb_complete(struct urb *urb, struct pt_regs *regs)
310 {
311         struct snd_usX2Y_substream *subs = urb->context;
312         struct usX2Ydev *usX2Y = subs->usX2Y;
313
314         if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
315                 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
316                             usb_get_current_frame_number(usX2Y->chip.dev),
317                             subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
318                             urb->status, urb->start_frame);
319                 return;
320         }
321         if (unlikely(urb->status)) {
322                 usX2Y_error_urb_status(usX2Y, subs, urb);
323                 return;
324         }
325         if (likely((0xFFFF & urb->start_frame) == usX2Y->wait_iso_frame))
326                 subs->completed_urb = urb;
327         else {
328                 usX2Y_error_sequence(usX2Y, subs, urb);
329                 return;
330         }
331         {
332                 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
333                         *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
334                 if (capsubs->completed_urb &&
335                     atomic_read(&capsubs->state) >= state_PREPARED &&
336                     (playbacksubs->completed_urb ||
337                      atomic_read(&playbacksubs->state) < state_PREPARED)) {
338                         if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame)) {
339                                 if (nr_of_packs() <= urb->start_frame &&
340                                     urb->start_frame <= (2 * nr_of_packs() - 1))        // uhci and ohci
341                                         usX2Y->wait_iso_frame = urb->start_frame - nr_of_packs();
342                                 else
343                                         usX2Y->wait_iso_frame +=  nr_of_packs();
344                         } else {
345                                 snd_printdd("\n");
346                                 usX2Y_clients_stop(usX2Y);
347                         }
348                 }
349         }
350 }
351
352 static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
353                                     void (*complete)(struct urb *, struct pt_regs *))
354 {
355         int s, u;
356         for (s = 0; s < 4; s++) {
357                 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
358                 if (NULL != subs)
359                         for (u = 0; u < NRURBS; u++) {
360                                 struct urb * urb = subs->urb[u];
361                                 if (NULL != urb)
362                                         urb->complete = complete;
363                         }
364         }
365 }
366
367 static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
368 {
369         usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
370         usX2Y->prepare_subs = NULL;
371 }
372
373 static void i_usX2Y_subs_startup(struct urb *urb, struct pt_regs *regs)
374 {
375         struct snd_usX2Y_substream *subs = urb->context;
376         struct usX2Ydev *usX2Y = subs->usX2Y;
377         struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
378         if (NULL != prepare_subs)
379                 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
380                         usX2Y_subs_startup_finish(usX2Y);
381                         atomic_inc(&prepare_subs->state);
382                         wake_up(&usX2Y->prepare_wait_queue);
383                 }
384
385         i_usX2Y_urb_complete(urb, regs);
386 }
387
388 static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
389 {
390         snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
391                     subs, subs->endpoint, subs->urb[0], subs->urb[1]);
392         /* reset the pointer */
393         subs->hwptr = 0;
394         subs->hwptr_done = 0;
395         subs->transfer_done = 0;
396 }
397
398
399 static void usX2Y_urb_release(struct urb **urb, int free_tb)
400 {
401         if (*urb) {
402                 usb_kill_urb(*urb);
403                 if (free_tb)
404                         kfree((*urb)->transfer_buffer);
405                 usb_free_urb(*urb);
406                 *urb = NULL;
407         }
408 }
409 /*
410  * release a substreams urbs
411  */
412 static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
413 {
414         int i;
415         snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
416         for (i = 0; i < NRURBS; i++)
417                 usX2Y_urb_release(subs->urb + i,
418                                   subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
419
420         kfree(subs->tmpbuf);
421         subs->tmpbuf = NULL;
422 }
423 /*
424  * initialize a substream's urbs
425  */
426 static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
427 {
428         int i;
429         unsigned int pipe;
430         int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
431         struct usb_device *dev = subs->usX2Y->chip.dev;
432
433         pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
434                         usb_rcvisocpipe(dev, subs->endpoint);
435         subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
436         if (!subs->maxpacksize)
437                 return -EINVAL;
438
439         if (is_playback && NULL == subs->tmpbuf) {      /* allocate a temporary buffer for playback */
440                 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
441                 if (NULL == subs->tmpbuf) {
442                         snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
443                         return -ENOMEM;
444                 }
445         }
446         /* allocate and initialize data urbs */
447         for (i = 0; i < NRURBS; i++) {
448                 struct urb **purb = subs->urb + i;
449                 if (*purb) {
450                         usb_kill_urb(*purb);
451                         continue;
452                 }
453                 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
454                 if (NULL == *purb) {
455                         usX2Y_urbs_release(subs);
456                         return -ENOMEM;
457                 }
458                 if (!is_playback && !(*purb)->transfer_buffer) {
459                         /* allocate a capture buffer per urb */
460                         (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
461                         if (NULL == (*purb)->transfer_buffer) {
462                                 usX2Y_urbs_release(subs);
463                                 return -ENOMEM;
464                         }
465                 }
466                 (*purb)->dev = dev;
467                 (*purb)->pipe = pipe;
468                 (*purb)->number_of_packets = nr_of_packs();
469                 (*purb)->context = subs;
470                 (*purb)->interval = 1;
471                 (*purb)->complete = i_usX2Y_subs_startup;
472         }
473         return 0;
474 }
475
476 static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
477 {
478         struct usX2Ydev *usX2Y = subs->usX2Y;
479         usX2Y->prepare_subs = subs;
480         subs->urb[0]->start_frame = -1;
481         wmb();
482         usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
483 }
484
485 static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
486 {
487         int i, err;
488         struct usX2Ydev *usX2Y = subs->usX2Y;
489
490         if ((err = usX2Y_urbs_allocate(subs)) < 0)
491                 return err;
492         subs->completed_urb = NULL;
493         for (i = 0; i < 4; i++) {
494                 struct snd_usX2Y_substream *subs = usX2Y->subs[i];
495                 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
496                         goto start;
497         }
498         usX2Y->wait_iso_frame = -1;
499
500  start:
501         usX2Y_subs_startup(subs);
502         for (i = 0; i < NRURBS; i++) {
503                 struct urb *urb = subs->urb[i];
504                 if (usb_pipein(urb->pipe)) {
505                         unsigned long pack;
506                         if (0 == i)
507                                 atomic_set(&subs->state, state_STARTING3);
508                         urb->dev = usX2Y->chip.dev;
509                         urb->transfer_flags = URB_ISO_ASAP;
510                         for (pack = 0; pack < nr_of_packs(); pack++) {
511                                 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
512                                 urb->iso_frame_desc[pack].length = subs->maxpacksize;
513                         }
514                         urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); 
515                         if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
516                                 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
517                                 err = -EPIPE;
518                                 goto cleanup;
519                         } else {
520                                 if (0 > usX2Y->wait_iso_frame)
521                                         usX2Y->wait_iso_frame = urb->start_frame;
522                         }
523                         urb->transfer_flags = 0;
524                 } else {
525                         atomic_set(&subs->state, state_STARTING1);
526                         break;
527                 }
528         }
529         err = 0;
530         wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
531         if (atomic_read(&subs->state) != state_PREPARED)
532                 err = -EPIPE;
533
534  cleanup:
535         if (err) {
536                 usX2Y_subs_startup_finish(usX2Y);
537                 usX2Y_clients_stop(usX2Y);              // something is completely wroong > stop evrything
538         }
539         return err;
540 }
541
542 /*
543  * return the current pcm pointer.  just return the hwptr_done value.
544  */
545 static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
546 {
547         struct snd_usX2Y_substream *subs = substream->runtime->private_data;
548         return subs->hwptr_done;
549 }
550 /*
551  * start/stop substream
552  */
553 static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
554 {
555         struct snd_usX2Y_substream *subs = substream->runtime->private_data;
556
557         switch (cmd) {
558         case SNDRV_PCM_TRIGGER_START:
559                 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
560                 if (atomic_read(&subs->state) == state_PREPARED &&
561                     atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
562                         atomic_set(&subs->state, state_PRERUNNING);
563                 } else {
564                         snd_printdd("\n");
565                         return -EPIPE;
566                 }
567                 break;
568         case SNDRV_PCM_TRIGGER_STOP:
569                 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
570                 if (atomic_read(&subs->state) >= state_PRERUNNING)
571                         atomic_set(&subs->state, state_PREPARED);
572                 break;
573         default:
574                 return -EINVAL;
575         }
576         return 0;
577 }
578
579
580 /*
581  * allocate a buffer, setup samplerate
582  *
583  * so far we use a physically linear buffer although packetize transfer
584  * doesn't need a continuous area.
585  * if sg buffer is supported on the later version of alsa, we'll follow
586  * that.
587  */
588 static struct s_c2
589 {
590         char c1, c2;
591 }
592         SetRate44100[] =
593 {
594         { 0x14, 0x08},  // this line sets 44100, well actually a little less
595         { 0x18, 0x40},  // only tascam / frontier design knows the further lines .......
596         { 0x18, 0x42},
597         { 0x18, 0x45},
598         { 0x18, 0x46},
599         { 0x18, 0x48},
600         { 0x18, 0x4A},
601         { 0x18, 0x4C},
602         { 0x18, 0x4E},
603         { 0x18, 0x50},
604         { 0x18, 0x52},
605         { 0x18, 0x54},
606         { 0x18, 0x56},
607         { 0x18, 0x58},
608         { 0x18, 0x5A},
609         { 0x18, 0x5C},
610         { 0x18, 0x5E},
611         { 0x18, 0x60},
612         { 0x18, 0x62},
613         { 0x18, 0x64},
614         { 0x18, 0x66},
615         { 0x18, 0x68},
616         { 0x18, 0x6A},
617         { 0x18, 0x6C},
618         { 0x18, 0x6E},
619         { 0x18, 0x70},
620         { 0x18, 0x72},
621         { 0x18, 0x74},
622         { 0x18, 0x76},
623         { 0x18, 0x78},
624         { 0x18, 0x7A},
625         { 0x18, 0x7C},
626         { 0x18, 0x7E}
627 };
628 static struct s_c2 SetRate48000[] =
629 {
630         { 0x14, 0x09},  // this line sets 48000, well actually a little less
631         { 0x18, 0x40},  // only tascam / frontier design knows the further lines .......
632         { 0x18, 0x42},
633         { 0x18, 0x45},
634         { 0x18, 0x46},
635         { 0x18, 0x48},
636         { 0x18, 0x4A},
637         { 0x18, 0x4C},
638         { 0x18, 0x4E},
639         { 0x18, 0x50},
640         { 0x18, 0x52},
641         { 0x18, 0x54},
642         { 0x18, 0x56},
643         { 0x18, 0x58},
644         { 0x18, 0x5A},
645         { 0x18, 0x5C},
646         { 0x18, 0x5E},
647         { 0x18, 0x60},
648         { 0x18, 0x62},
649         { 0x18, 0x64},
650         { 0x18, 0x66},
651         { 0x18, 0x68},
652         { 0x18, 0x6A},
653         { 0x18, 0x6C},
654         { 0x18, 0x6E},
655         { 0x18, 0x70},
656         { 0x18, 0x73},
657         { 0x18, 0x74},
658         { 0x18, 0x76},
659         { 0x18, 0x78},
660         { 0x18, 0x7A},
661         { 0x18, 0x7C},
662         { 0x18, 0x7E}
663 };
664 #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
665
666 static void i_usX2Y_04Int(struct urb *urb, struct pt_regs *regs)
667 {
668         struct usX2Ydev *usX2Y = urb->context;
669         
670         if (urb->status)
671                 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
672         if (0 == --usX2Y->US04->len)
673                 wake_up(&usX2Y->In04WaitQueue);
674 }
675
676 static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
677 {
678         int                     err = 0, i;
679         struct snd_usX2Y_urbSeq *us = NULL;
680         int                     *usbdata = NULL;
681         struct s_c2             *ra = rate == 48000 ? SetRate48000 : SetRate44100;
682
683         if (usX2Y->rate != rate) {
684                 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
685                 if (NULL == us) {
686                         err = -ENOMEM;
687                         goto cleanup;
688                 }
689                 usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL);
690                 if (NULL == usbdata) {
691                         err = -ENOMEM;
692                         goto cleanup;
693                 }
694                 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
695                         if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
696                                 err = -ENOMEM;
697                                 goto cleanup;
698                         }
699                         ((char*)(usbdata + i))[0] = ra[i].c1;
700                         ((char*)(usbdata + i))[1] = ra[i].c2;
701                         usb_fill_bulk_urb(us->urb[i], usX2Y->chip.dev, usb_sndbulkpipe(usX2Y->chip.dev, 4),
702                                           usbdata + i, 2, i_usX2Y_04Int, usX2Y);
703 #ifdef OLD_USB
704                         us->urb[i]->transfer_flags = USB_QUEUE_BULK;
705 #endif
706                 }
707                 us->submitted = 0;
708                 us->len =       NOOF_SETRATE_URBS;
709                 usX2Y->US04 =   us;
710                 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
711                 usX2Y->US04 =   NULL;
712                 if (us->len)
713                         err = -ENODEV;
714         cleanup:
715                 if (us) {
716                         us->submitted = 2*NOOF_SETRATE_URBS;
717                         for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
718                                 struct urb *urb = us->urb[i];
719                                 if (urb->status) {
720                                         if (!err)
721                                                 err = -ENODEV;
722                                         usb_kill_urb(urb);
723                                 }
724                                 usb_free_urb(urb);
725                         }
726                         usX2Y->US04 = NULL;
727                         kfree(usbdata);
728                         kfree(us);
729                         if (!err)
730                                 usX2Y->rate = rate;
731                 }
732         }
733
734         return err;
735 }
736
737
738 static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
739 {
740         int alternate, err;
741         struct list_head* p;
742         if (format == SNDRV_PCM_FORMAT_S24_3LE) {
743                 alternate = 2;
744                 usX2Y->stride = 6;
745         } else {
746                 alternate = 1;
747                 usX2Y->stride = 4;
748         }
749         list_for_each(p, &usX2Y->chip.midi_list) {
750                 snd_usbmidi_input_stop(p);
751         }
752         usb_kill_urb(usX2Y->In04urb);
753         if ((err = usb_set_interface(usX2Y->chip.dev, 0, alternate))) {
754                 snd_printk(KERN_ERR "usb_set_interface error \n");
755                 return err;
756         }
757         usX2Y->In04urb->dev = usX2Y->chip.dev;
758         err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
759         list_for_each(p, &usX2Y->chip.midi_list) {
760                 snd_usbmidi_input_start(p);
761         }
762         usX2Y->format = format;
763         usX2Y->rate = 0;
764         return err;
765 }
766
767
768 static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
769                                    struct snd_pcm_hw_params *hw_params)
770 {
771         int                     err = 0;
772         unsigned int            rate = params_rate(hw_params);
773         snd_pcm_format_t        format = params_format(hw_params);
774         struct snd_card *card = substream->pstr->pcm->card;
775         struct list_head *list;
776
777         snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
778         // all pcm substreams off one usX2Y have to operate at the same rate & format
779         list_for_each(list, &card->devices) {
780                 struct snd_device *dev;
781                 struct snd_pcm *pcm;
782                 int s;
783                 dev = snd_device(list);
784                 if (dev->type != SNDRV_DEV_PCM)
785                         continue;
786                 pcm = dev->device_data;
787                 for (s = 0; s < 2; ++s) {
788                         struct snd_pcm_substream *test_substream;
789                         test_substream = pcm->streams[s].substream;
790                         if (test_substream && test_substream != substream  &&
791                             test_substream->runtime &&
792                             ((test_substream->runtime->format &&
793                               test_substream->runtime->format != format) ||
794                              (test_substream->runtime->rate &&
795                               test_substream->runtime->rate != rate)))
796                                 return -EINVAL;
797                 }
798         }
799         if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
800                 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
801                            substream, params_buffer_bytes(hw_params), err);
802                 return err;
803         }
804         return 0;
805 }
806
807 /*
808  * free the buffer
809  */
810 static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
811 {
812         struct snd_pcm_runtime *runtime = substream->runtime;
813         struct snd_usX2Y_substream *subs = runtime->private_data;
814         down(&subs->usX2Y->prepare_mutex);
815         snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
816
817         if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
818                 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
819                 atomic_set(&subs->state, state_STOPPED);
820                 usX2Y_urbs_release(subs);
821                 if (!cap_subs->pcm_substream ||
822                     !cap_subs->pcm_substream->runtime ||
823                     !cap_subs->pcm_substream->runtime->status ||
824                     cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
825                         atomic_set(&cap_subs->state, state_STOPPED);
826                         usX2Y_urbs_release(cap_subs);
827                 }
828         } else {
829                 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
830                 if (atomic_read(&playback_subs->state) < state_PREPARED) {
831                         atomic_set(&subs->state, state_STOPPED);
832                         usX2Y_urbs_release(subs);
833                 }
834         }
835         up(&subs->usX2Y->prepare_mutex);
836         return snd_pcm_lib_free_pages(substream);
837 }
838 /*
839  * prepare callback
840  *
841  * set format and initialize urbs
842  */
843 static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
844 {
845         struct snd_pcm_runtime *runtime = substream->runtime;
846         struct snd_usX2Y_substream *subs = runtime->private_data;
847         struct usX2Ydev *usX2Y = subs->usX2Y;
848         struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
849         int err = 0;
850         snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
851
852         down(&usX2Y->prepare_mutex);
853         usX2Y_subs_prepare(subs);
854 // Start hardware streams
855 // SyncStream first....
856         if (atomic_read(&capsubs->state) < state_PREPARED) {
857                 if (usX2Y->format != runtime->format)
858                         if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
859                                 goto up_prepare_mutex;
860                 if (usX2Y->rate != runtime->rate)
861                         if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
862                                 goto up_prepare_mutex;
863                 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
864                 if (0 > (err = usX2Y_urbs_start(capsubs)))
865                         goto up_prepare_mutex;
866         }
867
868         if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
869                 err = usX2Y_urbs_start(subs);
870
871  up_prepare_mutex:
872         up(&usX2Y->prepare_mutex);
873         return err;
874 }
875
876 static struct snd_pcm_hardware snd_usX2Y_2c =
877 {
878         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
879                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
880                                  SNDRV_PCM_INFO_MMAP_VALID),
881         .formats =                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
882         .rates =                   SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
883         .rate_min =                44100,
884         .rate_max =                48000,
885         .channels_min =            2,
886         .channels_max =            2,
887         .buffer_bytes_max =     (2*128*1024),
888         .period_bytes_min =     64,
889         .period_bytes_max =     (128*1024),
890         .periods_min =          2,
891         .periods_max =          1024,
892         .fifo_size =              0
893 };
894
895
896
897 static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
898 {
899         struct snd_usX2Y_substream      *subs = ((struct snd_usX2Y_substream **)
900                                          snd_pcm_substream_chip(substream))[substream->stream];
901         struct snd_pcm_runtime  *runtime = substream->runtime;
902
903         if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
904                 return -EBUSY;
905
906         runtime->hw = snd_usX2Y_2c;
907         runtime->private_data = subs;
908         subs->pcm_substream = substream;
909         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
910         return 0;
911 }
912
913
914
915 static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
916 {
917         struct snd_pcm_runtime *runtime = substream->runtime;
918         struct snd_usX2Y_substream *subs = runtime->private_data;
919
920         subs->pcm_substream = NULL;
921
922         return 0;
923 }
924
925
926 static struct snd_pcm_ops snd_usX2Y_pcm_ops = 
927 {
928         .open =         snd_usX2Y_pcm_open,
929         .close =        snd_usX2Y_pcm_close,
930         .ioctl =        snd_pcm_lib_ioctl,
931         .hw_params =    snd_usX2Y_pcm_hw_params,
932         .hw_free =      snd_usX2Y_pcm_hw_free,
933         .prepare =      snd_usX2Y_pcm_prepare,
934         .trigger =      snd_usX2Y_pcm_trigger,
935         .pointer =      snd_usX2Y_pcm_pointer,
936 };
937
938
939 /*
940  * free a usb stream instance
941  */
942 static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
943 {
944         if (NULL != usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]) {
945                 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
946                 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
947         }
948         kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
949         usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
950 }
951
952 static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
953 {
954         struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
955         if (usX2Y_stream)
956                 usX2Y_audio_stream_free(usX2Y_stream);
957 }
958
959 static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
960 {
961         struct snd_pcm *pcm;
962         int err, i;
963         struct snd_usX2Y_substream **usX2Y_substream =
964                 usX2Y(card)->subs + 2 * usX2Y(card)->chip.pcm_devs;
965
966         for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
967              i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
968                 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
969                 if (NULL == usX2Y_substream[i]) {
970                         snd_printk(KERN_ERR "cannot malloc\n");
971                         return -ENOMEM;
972                 }
973                 usX2Y_substream[i]->usX2Y = usX2Y(card);
974         }
975
976         if (playback_endpoint)
977                 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
978         usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
979
980         err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->chip.pcm_devs,
981                           playback_endpoint ? 1 : 0, 1,
982                           &pcm);
983         if (err < 0) {
984                 usX2Y_audio_stream_free(usX2Y_substream);
985                 return err;
986         }
987
988         if (playback_endpoint)
989                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
990         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
991
992         pcm->private_data = usX2Y_substream;
993         pcm->private_free = snd_usX2Y_pcm_private_free;
994         pcm->info_flags = 0;
995
996         sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->chip.pcm_devs);
997
998         if ((playback_endpoint &&
999              0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
1000                                                      SNDRV_DMA_TYPE_CONTINUOUS,
1001                                                      snd_dma_continuous_data(GFP_KERNEL),
1002                                                      64*1024, 128*1024))) ||
1003             0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
1004                                                      SNDRV_DMA_TYPE_CONTINUOUS,
1005                                                      snd_dma_continuous_data(GFP_KERNEL),
1006                                                      64*1024, 128*1024))) {
1007                 snd_usX2Y_pcm_private_free(pcm);
1008                 return err;
1009         }
1010         usX2Y(card)->chip.pcm_devs++;
1011
1012         return 0;
1013 }
1014
1015 /*
1016  * create a chip instance and set its names.
1017  */
1018 int usX2Y_audio_create(struct snd_card *card)
1019 {
1020         int err = 0;
1021         
1022         INIT_LIST_HEAD(&usX2Y(card)->chip.pcm_list);
1023
1024         if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
1025                 return err;
1026         if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) == USB_ID_US428)
1027              if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
1028                      return err;
1029         if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) != USB_ID_US122)
1030                 err = usX2Y_rate_set(usX2Y(card), 44100);       // Lets us428 recognize output-volume settings, disturbs us122.
1031         return err;
1032 }