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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
[linux-block.git] / sound / usb / usx2y / usbusx2yaudio.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4
LT		 2/*
3 * US-X2Y AUDIO
4 * Copyright (c) 2002-2004 by Karsten Wiese
5 *
6 * based on
7 *
8 * (Tentative) USB Audio Driver for ALSA
9 *
10 * Main and PCM part
11 *
12 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
13 *
14 * Many codes borrowed from audio.c by
15 * Alan Cox (alan@lxorguk.ukuu.org.uk)
16 * Thomas Sailer (sailer@ife.ee.ethz.ch)
1da177e4
LT		 17 */
18
19
1da177e4 20#include <linux/interrupt.h>
5a0e3ad6 21#include <linux/slab.h>
1da177e4 22#include <linux/usb.h>
31623caa 23#include <linux/moduleparam.h>
1da177e4
LT		 24#include <sound/core.h>
25#include <sound/info.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28#include "usx2y.h"
29#include "usbusx2y.h"
30
31#define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb.
32 1 to 4 have been tested ok on uhci.
33 To use 3 on ohci, you'd need a patch:
34 look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
35 "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
36 .
37 1, 2 and 4 work out of the box on ohci, if I recall correctly.
38 Bigger is safer operation,
39 smaller gives lower latencies.
40 */
41#define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter
42 nrpacks set to 1, you might as well comment
43 this #define out, and thereby produce smaller, faster code.
44 You'd also set USX2Y_NRPACKS to 1 then.
45 */
46
47#ifdef USX2Y_NRPACKS_VARIABLE
48 static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
49 #define nr_of_packs() nrpacks
50 module_param(nrpacks, int, 0444);
51 MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
52#else
53 #define nr_of_packs() USX2Y_NRPACKS
54#endif
55
56
bbe85bbd 57static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs)
1da177e4
LT		 58{
59 struct urb *urb = subs->completed_urb;
bbe85bbd 60 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1da177e4
LT		 61 unsigned char *cp;
62 int i, len, lens = 0, hwptr_done = subs->hwptr_done;
bbe85bbd 63 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 64
65 for (i = 0; i < nr_of_packs(); i++) {
66 cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
67 if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
bbe85bbd 68 snd_printk(KERN_ERR "active frame status %i. "
6e8d5d2f 69 "Most probably some hardware problem.\n",
bbe85bbd 70 urb->iso_frame_desc[i].status);
1da177e4
LT		 71 return urb->iso_frame_desc[i].status;
72 }
73 len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
74 if (! len) {
75 snd_printd("0 == len ERROR!\n");
76 continue;
77 }
78
79 /* copy a data chunk */
80 if ((hwptr_done + len) > runtime->buffer_size) {
81 int cnt = runtime->buffer_size - hwptr_done;
82 int blen = cnt * usX2Y->stride;
83 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
84 memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
85 } else {
bbe85bbd
TI		 86 memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp,
87 len * usX2Y->stride);
1da177e4
LT		 88 }
89 lens += len;
90 if ((hwptr_done += len) >= runtime->buffer_size)
91 hwptr_done -= runtime->buffer_size;
92 }
93
94 subs->hwptr_done = hwptr_done;
95 subs->transfer_done += lens;
96 /* update the pointer, call callback if necessary */
97 if (subs->transfer_done >= runtime->period_size) {
98 subs->transfer_done -= runtime->period_size;
99 snd_pcm_period_elapsed(subs->pcm_substream);
100 }
101 return 0;
102}
103/*
104 * prepare urb for playback data pipe
105 *
106 * we copy the data directly from the pcm buffer.
107 * the current position to be copied is held in hwptr field.
108 * since a urb can handle only a single linear buffer, if the total
109 * transferred area overflows the buffer boundary, we cannot send
110 * it directly from the buffer. thus the data is once copied to
111 * a temporary buffer and urb points to that.
112 */
bbe85bbd 113static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs,
1da177e4
LT		 114 struct urb *cap_urb,
115 struct urb *urb)
116{
117 int count, counts, pack;
bbe85bbd
TI		 118 struct usX2Ydev *usX2Y = subs->usX2Y;
119 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1da177e4
LT		 120
121 count = 0;
122 for (pack = 0; pack < nr_of_packs(); pack++) {
123 /* calculate the size of a packet */
124 counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
125 count += counts;
126 if (counts < 43 || counts > 50) {
d3d579f8 127 snd_printk(KERN_ERR "should not be here with counts=%i\n", counts);
1da177e4
LT		 128 return -EPIPE;
129 }
130 /* set up descriptor */
131 urb->iso_frame_desc[pack].offset = pack ?
bbe85bbd
TI		 132 urb->iso_frame_desc[pack - 1].offset +
133 urb->iso_frame_desc[pack - 1].length :
1da177e4
LT		 134 0;
135 urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
136 }
137 if (atomic_read(&subs->state) >= state_PRERUNNING)
138 if (subs->hwptr + count > runtime->buffer_size) {
139 /* err, the transferred area goes over buffer boundary.
140 * copy the data to the temp buffer.
141 */
142 int len;
143 len = runtime->buffer_size - subs->hwptr;
144 urb->transfer_buffer = subs->tmpbuf;
bbe85bbd
TI		 145 memcpy(subs->tmpbuf, runtime->dma_area +
146 subs->hwptr * usX2Y->stride, len * usX2Y->stride);
147 memcpy(subs->tmpbuf + len * usX2Y->stride,
148 runtime->dma_area, (count - len) * usX2Y->stride);
1da177e4
LT		 149 subs->hwptr += count;
150 subs->hwptr -= runtime->buffer_size;
151 } else {
152 /* set the buffer pointer */
153 urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
154 if ((subs->hwptr += count) >= runtime->buffer_size)
82bd59bc 155 subs->hwptr -= runtime->buffer_size;
1da177e4
LT		 156 }
157 else
158 urb->transfer_buffer = subs->tmpbuf;
159 urb->transfer_buffer_length = count * usX2Y->stride;
160 return 0;
161}
162
163/*
164 * process after playback data complete
165 *
166 * update the current position and call callback if a period is processed.
167 */
bbe85bbd 168static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb)
1da177e4 169{
bbe85bbd 170 struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
1da177e4
LT		 171 int len = urb->actual_length / subs->usX2Y->stride;
172
173 subs->transfer_done += len;
174 subs->hwptr_done += len;
175 if (subs->hwptr_done >= runtime->buffer_size)
176 subs->hwptr_done -= runtime->buffer_size;
177 if (subs->transfer_done >= runtime->period_size) {
178 subs->transfer_done -= runtime->period_size;
179 snd_pcm_period_elapsed(subs->pcm_substream);
180 }
181}
182
bbe85bbd 183static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame)
1da177e4
LT		 184{
185 int err;
186 if (!urb)
187 return -ENODEV;
188 urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks
189 urb->hcpriv = NULL;
a014bbad 190 urb->dev = subs->usX2Y->dev; /* we need to set this at each time */
1da177e4 191 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
d3d579f8 192 snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err);
1da177e4
LT		 193 return err;
194 }
195 return 0;
196}
197
bbe85bbd
TI		 198static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs,
199 struct snd_usX2Y_substream *playbacksubs,
200 int frame)
1da177e4
LT		 201{
202 int err, state;
cb432379
TI		 203 struct urb *urb = playbacksubs->completed_urb;
204
205 state = atomic_read(&playbacksubs->state);
206 if (NULL != urb) {
207 if (state == state_RUNNING)
208 usX2Y_urb_play_retire(playbacksubs, urb);
bbe85bbd
TI		 209 else if (state >= state_PRERUNNING)
210 atomic_inc(&playbacksubs->state);
cb432379
TI		 211 } else {
212 switch (state) {
213 case state_STARTING1:
214 urb = playbacksubs->urb[0];
215 atomic_inc(&playbacksubs->state);
216 break;
217 case state_STARTING2:
218 urb = playbacksubs->urb[1];
219 atomic_inc(&playbacksubs->state);
220 break;
1da177e4 221 }
1da177e4 222 }
cb432379
TI		 223 if (urb) {
224 if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
bbe85bbd 225 (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
cb432379 226 return err;
bbe85bbd 227 }
cb432379
TI		 228 }
229
230 playbacksubs->completed_urb = NULL;
231
1da177e4
LT		 232 state = atomic_read(&capsubs->state);
233 if (state >= state_PREPARED) {
234 if (state == state_RUNNING) {
235 if ((err = usX2Y_urb_capt_retire(capsubs)))
236 return err;
cb432379
TI		 237 } else if (state >= state_PRERUNNING)
238 atomic_inc(&capsubs->state);
1da177e4
LT		 239 if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
240 return err;
241 }
242 capsubs->completed_urb = NULL;
243 return 0;
244}
245
246
bbe85bbd 247static void usX2Y_clients_stop(struct usX2Ydev *usX2Y)
1da177e4
LT		 248{
249 int s, u;
bbe85bbd 250
1da177e4 251 for (s = 0; s < 4; s++) {
bbe85bbd 252 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
1da177e4
LT		 253 if (subs) {
254 snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
255 atomic_set(&subs->state, state_STOPPED);
256 }
257 }
258 for (s = 0; s < 4; s++) {
bbe85bbd 259 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
1da177e4 260 if (subs) {
1fb8510c
TI		 261 if (atomic_read(&subs->state) >= state_PRERUNNING)
262 snd_pcm_stop_xrun(subs->pcm_substream);
1da177e4
LT		 263 for (u = 0; u < NRURBS; u++) {
264 struct urb *urb = subs->urb[u];
265 if (NULL != urb)
bbe85bbd
TI		 266 snd_printdd("%i status=%i start_frame=%i\n",
267 u, urb->status, urb->start_frame);
1da177e4
LT		 268 }
269 }
270 }
271 usX2Y->prepare_subs = NULL;
272 wake_up(&usX2Y->prepare_wait_queue);
273}
274
bbe85bbd
TI		 275static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y,
276 struct snd_usX2Y_substream *subs, struct urb *urb)
1da177e4 277{
d3d579f8 278 snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
1da177e4
LT		 279 urb->status = 0;
280 usX2Y_clients_stop(usX2Y);
281}
282
7d12e780 283static void i_usX2Y_urb_complete(struct urb *urb)
1da177e4 284{
bbe85bbd
TI		 285 struct snd_usX2Y_substream *subs = urb->context;
286 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 287
288 if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
bbe85bbd 289 snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n",
a014bbad 290 usb_get_current_frame_number(usX2Y->dev),
bbe85bbd
TI		 291 subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out",
292 urb->status, urb->start_frame);
1da177e4
LT		 293 return;
294 }
295 if (unlikely(urb->status)) {
296 usX2Y_error_urb_status(usX2Y, subs, urb);
297 return;
298 }
a9d14bc0
DM		 299
300 subs->completed_urb = urb;
301
1da177e4 302 {
bbe85bbd 303 struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
1da177e4 304 *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
bbe85bbd
TI		 305 if (capsubs->completed_urb &&
306 atomic_read(&capsubs->state) >= state_PREPARED &&
307 (playbacksubs->completed_urb ||
308 atomic_read(&playbacksubs->state) < state_PREPARED)) {
635bbb35
KW		 309 if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame))
310 usX2Y->wait_iso_frame += nr_of_packs();
311 else {
1da177e4
LT		 312 snd_printdd("\n");
313 usX2Y_clients_stop(usX2Y);
314 }
315 }
316 }
317}
318
bbe85bbd 319static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y,
7d12e780 320 void (*complete)(struct urb *))
1da177e4
LT		 321{
322 int s, u;
323 for (s = 0; s < 4; s++) {
bbe85bbd 324 struct snd_usX2Y_substream *subs = usX2Y->subs[s];
1da177e4
LT		 325 if (NULL != subs)
326 for (u = 0; u < NRURBS; u++) {
327 struct urb * urb = subs->urb[u];
328 if (NULL != urb)
329 urb->complete = complete;
330 }
331 }
332}
333
bbe85bbd 334static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y)
1da177e4
LT		 335{
336 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
337 usX2Y->prepare_subs = NULL;
338}
339
7d12e780 340static void i_usX2Y_subs_startup(struct urb *urb)
1da177e4 341{
bbe85bbd
TI		 342 struct snd_usX2Y_substream *subs = urb->context;
343 struct usX2Ydev *usX2Y = subs->usX2Y;
344 struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs;
1da177e4
LT		 345 if (NULL != prepare_subs)
346 if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
347 usX2Y_subs_startup_finish(usX2Y);
348 atomic_inc(&prepare_subs->state);
349 wake_up(&usX2Y->prepare_wait_queue);
350 }
351
7d12e780 352 i_usX2Y_urb_complete(urb);
1da177e4
LT		 353}
354
bbe85bbd 355static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs)
1da177e4 356{
bbe85bbd
TI		 357 snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n",
358 subs, subs->endpoint, subs->urb[0], subs->urb[1]);
1da177e4
LT		 359 /* reset the pointer */
360 subs->hwptr = 0;
361 subs->hwptr_done = 0;
362 subs->transfer_done = 0;
363}
364
365
bbe85bbd 366static void usX2Y_urb_release(struct urb **urb, int free_tb)
1da177e4
LT		 367{
368 if (*urb) {
369 usb_kill_urb(*urb);
370 if (free_tb)
371 kfree((*urb)->transfer_buffer);
372 usb_free_urb(*urb);
373 *urb = NULL;
374 }
375}
376/*
377 * release a substreams urbs
378 */
bbe85bbd 379static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs)
1da177e4
LT		 380{
381 int i;
382 snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
383 for (i = 0; i < NRURBS; i++)
bbe85bbd
TI		 384 usX2Y_urb_release(subs->urb + i,
385 subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
1da177e4 386
4d572776
JJ		 387 kfree(subs->tmpbuf);
388 subs->tmpbuf = NULL;
1da177e4
LT		 389}
390/*
391 * initialize a substream's urbs
392 */
bbe85bbd 393static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs)
1da177e4
LT		 394{
395 int i;
396 unsigned int pipe;
397 int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
a014bbad 398 struct usb_device *dev = subs->usX2Y->dev;
1da177e4
LT		 399
400 pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
401 usb_rcvisocpipe(dev, subs->endpoint);
402 subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
403 if (!subs->maxpacksize)
404 return -EINVAL;
405
406 if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */
407 subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
6fd9ff7b 408 if (!subs->tmpbuf)
1da177e4 409 return -ENOMEM;
1da177e4
LT		 410 }
411 /* allocate and initialize data urbs */
412 for (i = 0; i < NRURBS; i++) {
cb432379 413 struct urb **purb = subs->urb + i;
1da177e4
LT		 414 if (*purb) {
415 usb_kill_urb(*purb);
416 continue;
417 }
418 *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
419 if (NULL == *purb) {
420 usX2Y_urbs_release(subs);
421 return -ENOMEM;
422 }
423 if (!is_playback && !(*purb)->transfer_buffer) {
424 /* allocate a capture buffer per urb */
6da2ec56
KC		 425 (*purb)->transfer_buffer =
426 kmalloc_array(subs->maxpacksize,
427 nr_of_packs(), GFP_KERNEL);
1da177e4
LT		 428 if (NULL == (*purb)->transfer_buffer) {
429 usX2Y_urbs_release(subs);
430 return -ENOMEM;
431 }
432 }
433 (*purb)->dev = dev;
434 (*purb)->pipe = pipe;
435 (*purb)->number_of_packets = nr_of_packs();
436 (*purb)->context = subs;
437 (*purb)->interval = 1;
438 (*purb)->complete = i_usX2Y_subs_startup;
439 }
440 return 0;
441}
442
bbe85bbd 443static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs)
1da177e4 444{
bbe85bbd 445 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 446 usX2Y->prepare_subs = subs;
447 subs->urb[0]->start_frame = -1;
448 wmb();
449 usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
450}
451
bbe85bbd 452static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs)
1da177e4
LT		 453{
454 int i, err;
bbe85bbd 455 struct usX2Ydev *usX2Y = subs->usX2Y;
1da177e4
LT		 456
457 if ((err = usX2Y_urbs_allocate(subs)) < 0)
458 return err;
459 subs->completed_urb = NULL;
460 for (i = 0; i < 4; i++) {
bbe85bbd 461 struct snd_usX2Y_substream *subs = usX2Y->subs[i];
1da177e4
LT		 462 if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
463 goto start;
464 }
cb432379 465
1da177e4 466 start:
cb432379
TI		 467 usX2Y_subs_startup(subs);
468 for (i = 0; i < NRURBS; i++) {
469 struct urb *urb = subs->urb[i];
470 if (usb_pipein(urb->pipe)) {
471 unsigned long pack;
472 if (0 == i)
473 atomic_set(&subs->state, state_STARTING3);
a014bbad 474 urb->dev = usX2Y->dev;
cb432379
TI		 475 for (pack = 0; pack < nr_of_packs(); pack++) {
476 urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
477 urb->iso_frame_desc[pack].length = subs->maxpacksize;
478 }
479 urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs();
480 if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
481 snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
482 err = -EPIPE;
483 goto cleanup;
635bbb35
KW		 484 } else
485 if (i == 0)
cb432379 486 usX2Y->wait_iso_frame = urb->start_frame;
cb432379
TI		 487 urb->transfer_flags = 0;
488 } else {
489 atomic_set(&subs->state, state_STARTING1);
490 break;
1da177e4 491 }
cb432379
TI		 492 }
493 err = 0;
494 wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
495 if (atomic_read(&subs->state) != state_PREPARED)
496 err = -EPIPE;
497
498 cleanup:
499 if (err) {
500 usX2Y_subs_startup_finish(usX2Y);
501 usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything
1da177e4
LT		 502 }
503 return err;
504}
505
506/*
507 * return the current pcm pointer. just return the hwptr_done value.
508 */
bbe85bbd 509static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream)
1da177e4 510{
bbe85bbd 511 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
1da177e4
LT		 512 return subs->hwptr_done;
513}
514/*
515 * start/stop substream
516 */
bbe85bbd 517static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
1da177e4 518{
bbe85bbd 519 struct snd_usX2Y_substream *subs = substream->runtime->private_data;
1da177e4
LT		 520
521 switch (cmd) {
522 case SNDRV_PCM_TRIGGER_START:
523 snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
524 if (atomic_read(&subs->state) == state_PREPARED &&
525 atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
526 atomic_set(&subs->state, state_PRERUNNING);
527 } else {
528 snd_printdd("\n");
529 return -EPIPE;
530 }
531 break;
532 case SNDRV_PCM_TRIGGER_STOP:
533 snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
534 if (atomic_read(&subs->state) >= state_PRERUNNING)
535 atomic_set(&subs->state, state_PREPARED);
536 break;
537 default:
538 return -EINVAL;
539 }
540 return 0;
541}
542
543
544/*
545 * allocate a buffer, setup samplerate
546 *
547 * so far we use a physically linear buffer although packetize transfer
548 * doesn't need a continuous area.
549 * if sg buffer is supported on the later version of alsa, we'll follow
550 * that.
551 */
552static struct s_c2
553{
554 char c1, c2;
555}
556 SetRate44100[] =
557{
558 { 0x14, 0x08}, // this line sets 44100, well actually a little less
559 { 0x18, 0x40}, // only tascam / frontier design knows the further lines .......
560 { 0x18, 0x42},
561 { 0x18, 0x45},
562 { 0x18, 0x46},
563 { 0x18, 0x48},
564 { 0x18, 0x4A},
565 { 0x18, 0x4C},
566 { 0x18, 0x4E},
567 { 0x18, 0x50},
568 { 0x18, 0x52},
569 { 0x18, 0x54},
570 { 0x18, 0x56},
571 { 0x18, 0x58},
572 { 0x18, 0x5A},
573 { 0x18, 0x5C},
574 { 0x18, 0x5E},
575 { 0x18, 0x60},
576 { 0x18, 0x62},
577 { 0x18, 0x64},
578 { 0x18, 0x66},
579 { 0x18, 0x68},
580 { 0x18, 0x6A},
581 { 0x18, 0x6C},
582 { 0x18, 0x6E},
583 { 0x18, 0x70},
584 { 0x18, 0x72},
585 { 0x18, 0x74},
586 { 0x18, 0x76},
587 { 0x18, 0x78},
588 { 0x18, 0x7A},
589 { 0x18, 0x7C},
590 { 0x18, 0x7E}
591};
592static struct s_c2 SetRate48000[] =
593{
594 { 0x14, 0x09}, // this line sets 48000, 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, 0x73},
621 { 0x18, 0x74},
622 { 0x18, 0x76},
623 { 0x18, 0x78},
624 { 0x18, 0x7A},
625 { 0x18, 0x7C},
626 { 0x18, 0x7E}
627};
628#define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
629
7d12e780 630static void i_usX2Y_04Int(struct urb *urb)
1da177e4 631{
bbe85bbd 632 struct usX2Ydev *usX2Y = urb->context;
1da177e4 633
d3d579f8
TI		 634 if (urb->status)
635 snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
1da177e4
LT		 636 if (0 == --usX2Y->US04->len)
637 wake_up(&usX2Y->In04WaitQueue);
638}
639
bbe85bbd 640static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate)
1da177e4
LT		 641{
642 int err = 0, i;
bbe85bbd 643 struct snd_usX2Y_urbSeq *us = NULL;
1da177e4
LT		 644 int *usbdata = NULL;
645 struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
646
647 if (usX2Y->rate != rate) {
cb432379 648 us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
1da177e4
LT		 649 if (NULL == us) {
650 err = -ENOMEM;
651 goto cleanup;
652 }
6da2ec56
KC		 653 usbdata = kmalloc_array(NOOF_SETRATE_URBS, sizeof(int),
654 GFP_KERNEL);
1da177e4
LT		 655 if (NULL == usbdata) {
656 err = -ENOMEM;
657 goto cleanup;
658 }
659 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
660 if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
661 err = -ENOMEM;
662 goto cleanup;
663 }
664 ((char*)(usbdata + i))[0] = ra[i].c1;
665 ((char*)(usbdata + i))[1] = ra[i].c2;
a014bbad 666 usb_fill_bulk_urb(us->urb[i], usX2Y->dev, usb_sndbulkpipe(usX2Y->dev, 4),
1da177e4 667 usbdata + i, 2, i_usX2Y_04Int, usX2Y);
1da177e4 668 }
1f100349
TI		 669 err = usb_urb_ep_type_check(us->urb[0]);
670 if (err < 0)
671 goto cleanup;
1da177e4
LT		 672 us->submitted = 0;
673 us->len = NOOF_SETRATE_URBS;
674 usX2Y->US04 = us;
675 wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
676 usX2Y->US04 = NULL;
677 if (us->len)
678 err = -ENODEV;
679 cleanup:
680 if (us) {
681 us->submitted = 2*NOOF_SETRATE_URBS;
682 for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
683 struct urb *urb = us->urb[i];
684 if (urb->status) {
685 if (!err)
686 err = -ENODEV;
687 usb_kill_urb(urb);
688 }
689 usb_free_urb(urb);
690 }
691 usX2Y->US04 = NULL;
692 kfree(usbdata);
693 kfree(us);
cb432379 694 if (!err)
1da177e4 695 usX2Y->rate = rate;
1da177e4
LT		 696 }
697 }
698
699 return err;
700}
701
702
bbe85bbd 703static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format)
1da177e4
LT		 704{
705 int alternate, err;
706 struct list_head* p;
707 if (format == SNDRV_PCM_FORMAT_S24_3LE) {
708 alternate = 2;
709 usX2Y->stride = 6;
710 } else {
711 alternate = 1;
712 usX2Y->stride = 4;
713 }
d82af9f9 714 list_for_each(p, &usX2Y->midi_list) {
1da177e4
LT		 715 snd_usbmidi_input_stop(p);
716 }
717 usb_kill_urb(usX2Y->In04urb);
a014bbad 718 if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) {
d3d579f8 719 snd_printk(KERN_ERR "usb_set_interface error \n");
1da177e4
LT		 720 return err;
721 }
a014bbad 722 usX2Y->In04urb->dev = usX2Y->dev;
1da177e4 723 err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
d82af9f9 724 list_for_each(p, &usX2Y->midi_list) {
1da177e4
LT		 725 snd_usbmidi_input_start(p);
726 }
727 usX2Y->format = format;
728 usX2Y->rate = 0;
729 return err;
730}
731
732
bbe85bbd
TI		 733static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream,
734 struct snd_pcm_hw_params *hw_params)
1da177e4
LT		 735{
736 int err = 0;
737 unsigned int rate = params_rate(hw_params);
738 snd_pcm_format_t format = params_format(hw_params);
bbe85bbd 739 struct snd_card *card = substream->pstr->pcm->card;
e2439a54
TI		 740 struct usX2Ydev *dev = usX2Y(card);
741 int i;
cb432379 742
e2439a54 743 mutex_lock(&usX2Y(card)->pcm_mutex);
cb432379 744 snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
e2439a54
TI		 745 /* all pcm substreams off one usX2Y have to operate at the same
746 * rate & format
747 */
748 for (i = 0; i < dev->pcm_devs * 2; i++) {
749 struct snd_usX2Y_substream *subs = dev->subs[i];
750 struct snd_pcm_substream *test_substream;
751
752 if (!subs)
753 continue;
754 test_substream = subs->pcm_substream;
755 if (!test_substream || test_substream == substream ||
756 !test_substream->runtime)
cb432379 757 continue;
e2439a54
TI		 758 if ((test_substream->runtime->format &&
759 test_substream->runtime->format != format) ||
760 (test_substream->runtime->rate &&
761 test_substream->runtime->rate != rate)) {
762 err = -EINVAL;
763 goto error;
1da177e4
LT		 764 }
765 }
e2439a54
TI		 766
767 err = snd_pcm_lib_malloc_pages(substream,
768 params_buffer_bytes(hw_params));
769 if (err < 0) {
bbe85bbd
TI		 770 snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n",
771 substream, params_buffer_bytes(hw_params), err);
e2439a54 772 goto error;
1da177e4 773 }
e2439a54
TI		 774
775 error:
776 mutex_unlock(&usX2Y(card)->pcm_mutex);
777 return err;
1da177e4
LT		 778}
779
780/*
781 * free the buffer
782 */
bbe85bbd 783static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream)
1da177e4 784{
bbe85bbd
TI		 785 struct snd_pcm_runtime *runtime = substream->runtime;
786 struct snd_usX2Y_substream *subs = runtime->private_data;
e2439a54 787 mutex_lock(&subs->usX2Y->pcm_mutex);
1da177e4
LT		 788 snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
789
790 if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
bbe85bbd 791 struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
1da177e4
LT		 792 atomic_set(&subs->state, state_STOPPED);
793 usX2Y_urbs_release(subs);
794 if (!cap_subs->pcm_substream ||
795 !cap_subs->pcm_substream->runtime ||
796 !cap_subs->pcm_substream->runtime->status ||
797 cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
798 atomic_set(&cap_subs->state, state_STOPPED);
799 usX2Y_urbs_release(cap_subs);
800 }
801 } else {
bbe85bbd 802 struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
1da177e4
LT		 803 if (atomic_read(&playback_subs->state) < state_PREPARED) {
804 atomic_set(&subs->state, state_STOPPED);
805 usX2Y_urbs_release(subs);
806 }
807 }
e2439a54 808 mutex_unlock(&subs->usX2Y->pcm_mutex);
1da177e4
LT		 809 return snd_pcm_lib_free_pages(substream);
810}
811/*
812 * prepare callback
813 *
814 * set format and initialize urbs
815 */
bbe85bbd 816static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream)
1da177e4 817{
bbe85bbd
TI		 818 struct snd_pcm_runtime *runtime = substream->runtime;
819 struct snd_usX2Y_substream *subs = runtime->private_data;
820 struct usX2Ydev *usX2Y = subs->usX2Y;
821 struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
1da177e4
LT		 822 int err = 0;
823 snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
824
e2439a54 825 mutex_lock(&usX2Y->pcm_mutex);
1da177e4
LT		 826 usX2Y_subs_prepare(subs);
827// Start hardware streams
828// SyncStream first....
829 if (atomic_read(&capsubs->state) < state_PREPARED) {
830 if (usX2Y->format != runtime->format)
831 if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
832 goto up_prepare_mutex;
833 if (usX2Y->rate != runtime->rate)
834 if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
835 goto up_prepare_mutex;
836 snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
837 if (0 > (err = usX2Y_urbs_start(capsubs)))
838 goto up_prepare_mutex;
839 }
840
841 if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
842 err = usX2Y_urbs_start(subs);
843
844 up_prepare_mutex:
e2439a54 845 mutex_unlock(&usX2Y->pcm_mutex);
1da177e4
LT		 846 return err;
847}
848
bbe85bbd 849static struct snd_pcm_hardware snd_usX2Y_2c =
1da177e4
LT		 850{
851 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
852 SNDRV_PCM_INFO_BLOCK_TRANSFER |
2008f137
TI		 853 SNDRV_PCM_INFO_MMAP_VALID |
854 SNDRV_PCM_INFO_BATCH),
1da177e4
LT		 855 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
856 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
857 .rate_min = 44100,
858 .rate_max = 48000,
859 .channels_min = 2,
860 .channels_max = 2,
861 .buffer_bytes_max = (2*128*1024),
862 .period_bytes_min = 64,
863 .period_bytes_max = (128*1024),
864 .periods_min = 2,
865 .periods_max = 1024,
866 .fifo_size = 0
867};
868
869
870
bbe85bbd 871static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream)
1da177e4 872{
bbe85bbd 873 struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **)
1da177e4 874 snd_pcm_substream_chip(substream))[substream->stream];
bbe85bbd 875 struct snd_pcm_runtime *runtime = substream->runtime;
1da177e4
LT		 876
877 if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
878 return -EBUSY;
879
880 runtime->hw = snd_usX2Y_2c;
881 runtime->private_data = subs;
882 subs->pcm_substream = substream;
883 snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
884 return 0;
885}
886
887
888
bbe85bbd 889static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream)
1da177e4 890{
bbe85bbd
TI		 891 struct snd_pcm_runtime *runtime = substream->runtime;
892 struct snd_usX2Y_substream *subs = runtime->private_data;
1da177e4
LT		 893
894 subs->pcm_substream = NULL;
895
bbe85bbd 896 return 0;
1da177e4
LT		 897}
898
899
31cb1fb4 900static const struct snd_pcm_ops snd_usX2Y_pcm_ops =
1da177e4
LT		 901{
902 .open = snd_usX2Y_pcm_open,
903 .close = snd_usX2Y_pcm_close,
904 .ioctl = snd_pcm_lib_ioctl,
905 .hw_params = snd_usX2Y_pcm_hw_params,
906 .hw_free = snd_usX2Y_pcm_hw_free,
907 .prepare = snd_usX2Y_pcm_prepare,
908 .trigger = snd_usX2Y_pcm_trigger,
909 .pointer = snd_usX2Y_pcm_pointer,
910};
911
912
913/*
914 * free a usb stream instance
915 */
bbe85bbd 916static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream)
1da177e4 917{
c111b8de
RK		 918 kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
919 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
920
1da177e4
LT		 921 kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
922 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
923}
924
bbe85bbd 925static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm)
1da177e4 926{
bbe85bbd 927 struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data;
c3e6f7d8 928 if (usX2Y_stream)
1da177e4 929 usX2Y_audio_stream_free(usX2Y_stream);
1da177e4
LT		 930}
931
bbe85bbd 932static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint)
1da177e4 933{
bbe85bbd 934 struct snd_pcm *pcm;
1da177e4 935 int err, i;
bbe85bbd 936 struct snd_usX2Y_substream **usX2Y_substream =
a014bbad 937 usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs;
1da177e4
LT		 938
939 for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
940 i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
bbe85bbd 941 usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL);
6fd9ff7b 942 if (!usX2Y_substream[i])
1da177e4 943 return -ENOMEM;
6fd9ff7b 944
1da177e4
LT		 945 usX2Y_substream[i]->usX2Y = usX2Y(card);
946 }
947
948 if (playback_endpoint)
949 usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
950 usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
951
a014bbad 952 err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs,
1da177e4
LT		 953 playback_endpoint ? 1 : 0, 1,
954 &pcm);
955 if (err < 0) {
956 usX2Y_audio_stream_free(usX2Y_substream);
957 return err;
958 }
959
960 if (playback_endpoint)
961 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
962 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
963
964 pcm->private_data = usX2Y_substream;
965 pcm->private_free = snd_usX2Y_pcm_private_free;
966 pcm->info_flags = 0;
967
a014bbad 968 sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs);
1da177e4 969
4d1b5303
TI		 970 if (playback_endpoint) {
971 snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
972 SNDRV_DMA_TYPE_CONTINUOUS,
973 snd_dma_continuous_data(GFP_KERNEL),
974 64*1024, 128*1024);
1da177e4 975 }
4d1b5303
TI		 976
977 snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
978 SNDRV_DMA_TYPE_CONTINUOUS,
979 snd_dma_continuous_data(GFP_KERNEL),
980 64*1024, 128*1024);
a014bbad 981 usX2Y(card)->pcm_devs++;
1da177e4
LT		 982
983 return 0;
984}
985
986/*
987 * create a chip instance and set its names.
988 */
bbe85bbd 989int usX2Y_audio_create(struct snd_card *card)
1da177e4
LT		 990{
991 int err = 0;
992
a014bbad 993 INIT_LIST_HEAD(&usX2Y(card)->pcm_list);
1da177e4
LT		 994
995 if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
996 return err;
a014bbad 997 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428)
1da177e4
LT		 998 if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
999 return err;
a014bbad 1000 if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122)
1da177e4
LT		 1001 err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.
1002 return err;
1003}
Linux 6.x block layer and io_uring tree(s)