Commit | Line | Data |
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132fcb46 JB |
1 | /* |
2 | * f_uac2.c -- USB Audio Class 2.0 Function | |
3 | * | |
4 | * Copyright (C) 2011 | |
5 | * Yadwinder Singh (yadi.brar01@gmail.com) | |
6 | * Jaswinder Singh (jaswinder.singh@linaro.org) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/usb/audio.h> | |
15 | #include <linux/usb/audio-v2.h> | |
16 | #include <linux/platform_device.h> | |
17 | #include <linux/module.h> | |
18 | ||
19 | #include <sound/core.h> | |
20 | #include <sound/pcm.h> | |
21 | #include <sound/pcm_params.h> | |
22 | ||
f8f93d24 AP |
23 | #include "u_uac2.h" |
24 | ||
132fcb46 JB |
25 | /* Keep everyone on toes */ |
26 | #define USB_XFERS 2 | |
27 | ||
28 | /* | |
29 | * The driver implements a simple UAC_2 topology. | |
30 | * USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture | |
31 | * ALSA_Playback -> IT_2 -> OT_4 -> USB-IN | |
32 | * Capture and Playback sampling rates are independently | |
33 | * controlled by two clock sources : | |
34 | * CLK_5 := c_srate, and CLK_6 := p_srate | |
35 | */ | |
36 | #define USB_OUT_IT_ID 1 | |
37 | #define IO_IN_IT_ID 2 | |
38 | #define IO_OUT_OT_ID 3 | |
39 | #define USB_IN_OT_ID 4 | |
40 | #define USB_OUT_CLK_ID 5 | |
41 | #define USB_IN_CLK_ID 6 | |
42 | ||
43 | #define CONTROL_ABSENT 0 | |
44 | #define CONTROL_RDONLY 1 | |
45 | #define CONTROL_RDWR 3 | |
46 | ||
47 | #define CLK_FREQ_CTRL 0 | |
48 | #define CLK_VLD_CTRL 2 | |
49 | ||
50 | #define COPY_CTRL 0 | |
51 | #define CONN_CTRL 2 | |
52 | #define OVRLD_CTRL 4 | |
53 | #define CLSTR_CTRL 6 | |
54 | #define UNFLW_CTRL 8 | |
55 | #define OVFLW_CTRL 10 | |
56 | ||
ef16e7c8 | 57 | static const char *uac2_name = "snd_uac2"; |
132fcb46 JB |
58 | |
59 | struct uac2_req { | |
60 | struct uac2_rtd_params *pp; /* parent param */ | |
61 | struct usb_request *req; | |
62 | }; | |
63 | ||
64 | struct uac2_rtd_params { | |
eb127cb5 | 65 | struct snd_uac2_chip *uac2; /* parent chip */ |
132fcb46 JB |
66 | bool ep_enabled; /* if the ep is enabled */ |
67 | /* Size of the ring buffer */ | |
68 | size_t dma_bytes; | |
69 | unsigned char *dma_area; | |
70 | ||
71 | struct snd_pcm_substream *ss; | |
72 | ||
73 | /* Ring buffer */ | |
74 | ssize_t hw_ptr; | |
75 | ||
76 | void *rbuf; | |
77 | ||
78 | size_t period_size; | |
79 | ||
80 | unsigned max_psize; | |
81 | struct uac2_req ureq[USB_XFERS]; | |
82 | ||
83 | spinlock_t lock; | |
84 | }; | |
85 | ||
86 | struct snd_uac2_chip { | |
87 | struct platform_device pdev; | |
88 | struct platform_driver pdrv; | |
89 | ||
90 | struct uac2_rtd_params p_prm; | |
91 | struct uac2_rtd_params c_prm; | |
92 | ||
93 | struct snd_card *card; | |
94 | struct snd_pcm *pcm; | |
9bb87f16 DM |
95 | |
96 | /* timekeeping for the playback endpoint */ | |
97 | unsigned int p_interval; | |
98 | unsigned int p_residue; | |
99 | ||
100 | /* pre-calculated values for playback iso completion */ | |
101 | unsigned int p_pktsize; | |
102 | unsigned int p_pktsize_residue; | |
103 | unsigned int p_framesize; | |
132fcb46 JB |
104 | }; |
105 | ||
106 | #define BUFF_SIZE_MAX (PAGE_SIZE * 16) | |
107 | #define PRD_SIZE_MAX PAGE_SIZE | |
108 | #define MIN_PERIODS 4 | |
109 | ||
110 | static struct snd_pcm_hardware uac2_pcm_hardware = { | |
111 | .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | |
112 | | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | |
113 | | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, | |
114 | .rates = SNDRV_PCM_RATE_CONTINUOUS, | |
115 | .periods_max = BUFF_SIZE_MAX / PRD_SIZE_MAX, | |
116 | .buffer_bytes_max = BUFF_SIZE_MAX, | |
117 | .period_bytes_max = PRD_SIZE_MAX, | |
118 | .periods_min = MIN_PERIODS, | |
119 | }; | |
120 | ||
121 | struct audio_dev { | |
4ce63571 SAS |
122 | u8 ac_intf, ac_alt; |
123 | u8 as_out_intf, as_out_alt; | |
124 | u8 as_in_intf, as_in_alt; | |
132fcb46 JB |
125 | |
126 | struct usb_ep *in_ep, *out_ep; | |
127 | struct usb_function func; | |
128 | ||
129 | /* The ALSA Sound Card it represents on the USB-Client side */ | |
130 | struct snd_uac2_chip uac2; | |
131 | }; | |
132 | ||
132fcb46 JB |
133 | static inline |
134 | struct audio_dev *func_to_agdev(struct usb_function *f) | |
135 | { | |
136 | return container_of(f, struct audio_dev, func); | |
137 | } | |
138 | ||
139 | static inline | |
140 | struct audio_dev *uac2_to_agdev(struct snd_uac2_chip *u) | |
141 | { | |
142 | return container_of(u, struct audio_dev, uac2); | |
143 | } | |
144 | ||
145 | static inline | |
146 | struct snd_uac2_chip *pdev_to_uac2(struct platform_device *p) | |
147 | { | |
148 | return container_of(p, struct snd_uac2_chip, pdev); | |
149 | } | |
150 | ||
254b3bf6 DM |
151 | static inline |
152 | struct f_uac2_opts *agdev_to_uac2_opts(struct audio_dev *agdev) | |
153 | { | |
154 | return container_of(agdev->func.fi, struct f_uac2_opts, func_inst); | |
155 | } | |
156 | ||
132fcb46 JB |
157 | static inline |
158 | uint num_channels(uint chanmask) | |
159 | { | |
160 | uint num = 0; | |
161 | ||
162 | while (chanmask) { | |
163 | num += (chanmask & 1); | |
164 | chanmask >>= 1; | |
165 | } | |
166 | ||
167 | return num; | |
168 | } | |
169 | ||
170 | static void | |
171 | agdev_iso_complete(struct usb_ep *ep, struct usb_request *req) | |
172 | { | |
173 | unsigned pending; | |
174 | unsigned long flags; | |
ec9e4313 | 175 | unsigned int hw_ptr; |
132fcb46 | 176 | bool update_alsa = false; |
132fcb46 JB |
177 | int status = req->status; |
178 | struct uac2_req *ur = req->context; | |
179 | struct snd_pcm_substream *substream; | |
180 | struct uac2_rtd_params *prm = ur->pp; | |
eb127cb5 | 181 | struct snd_uac2_chip *uac2 = prm->uac2; |
132fcb46 JB |
182 | |
183 | /* i/f shutting down */ | |
1ade5d7e | 184 | if (!prm->ep_enabled || req->status == -ESHUTDOWN) |
132fcb46 JB |
185 | return; |
186 | ||
187 | /* | |
188 | * We can't really do much about bad xfers. | |
189 | * Afterall, the ISOCH xfers could fail legitimately. | |
190 | */ | |
191 | if (status) | |
192 | pr_debug("%s: iso_complete status(%d) %d/%d\n", | |
193 | __func__, status, req->actual, req->length); | |
194 | ||
195 | substream = prm->ss; | |
196 | ||
197 | /* Do nothing if ALSA isn't active */ | |
198 | if (!substream) | |
199 | goto exit; | |
200 | ||
201 | spin_lock_irqsave(&prm->lock, flags); | |
202 | ||
9bb87f16 DM |
203 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
204 | /* | |
205 | * For each IN packet, take the quotient of the current data | |
206 | * rate and the endpoint's interval as the base packet size. | |
207 | * If there is a residue from this division, add it to the | |
208 | * residue accumulator. | |
209 | */ | |
210 | req->length = uac2->p_pktsize; | |
211 | uac2->p_residue += uac2->p_pktsize_residue; | |
212 | ||
213 | /* | |
214 | * Whenever there are more bytes in the accumulator than we | |
215 | * need to add one more sample frame, increase this packet's | |
216 | * size and decrease the accumulator. | |
217 | */ | |
218 | if (uac2->p_residue / uac2->p_interval >= uac2->p_framesize) { | |
219 | req->length += uac2->p_framesize; | |
220 | uac2->p_residue -= uac2->p_framesize * | |
221 | uac2->p_interval; | |
222 | } | |
223 | ||
132fcb46 | 224 | req->actual = req->length; |
9bb87f16 | 225 | } |
132fcb46 JB |
226 | |
227 | pending = prm->hw_ptr % prm->period_size; | |
228 | pending += req->actual; | |
229 | if (pending >= prm->period_size) | |
230 | update_alsa = true; | |
231 | ||
ec9e4313 | 232 | hw_ptr = prm->hw_ptr; |
132fcb46 JB |
233 | prm->hw_ptr = (prm->hw_ptr + req->actual) % prm->dma_bytes; |
234 | ||
235 | spin_unlock_irqrestore(&prm->lock, flags); | |
236 | ||
237 | /* Pack USB load in ALSA ring buffer */ | |
ec9e4313 DM |
238 | pending = prm->dma_bytes - hw_ptr; |
239 | ||
240 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
241 | if (unlikely(pending < req->actual)) { | |
242 | memcpy(req->buf, prm->dma_area + hw_ptr, pending); | |
243 | memcpy(req->buf + pending, prm->dma_area, | |
244 | req->actual - pending); | |
245 | } else { | |
246 | memcpy(req->buf, prm->dma_area + hw_ptr, req->actual); | |
247 | } | |
248 | } else { | |
249 | if (unlikely(pending < req->actual)) { | |
250 | memcpy(prm->dma_area + hw_ptr, req->buf, pending); | |
251 | memcpy(prm->dma_area, req->buf + pending, | |
252 | req->actual - pending); | |
253 | } else { | |
254 | memcpy(prm->dma_area + hw_ptr, req->buf, req->actual); | |
255 | } | |
256 | } | |
257 | ||
132fcb46 JB |
258 | exit: |
259 | if (usb_ep_queue(ep, req, GFP_ATOMIC)) | |
260 | dev_err(&uac2->pdev.dev, "%d Error!\n", __LINE__); | |
261 | ||
262 | if (update_alsa) | |
263 | snd_pcm_period_elapsed(substream); | |
264 | ||
265 | return; | |
266 | } | |
267 | ||
268 | static int | |
269 | uac2_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | |
270 | { | |
271 | struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream); | |
132fcb46 JB |
272 | struct uac2_rtd_params *prm; |
273 | unsigned long flags; | |
132fcb46 JB |
274 | int err = 0; |
275 | ||
b6424353 | 276 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
132fcb46 | 277 | prm = &uac2->p_prm; |
b6424353 | 278 | else |
132fcb46 | 279 | prm = &uac2->c_prm; |
132fcb46 JB |
280 | |
281 | spin_lock_irqsave(&prm->lock, flags); | |
282 | ||
283 | /* Reset */ | |
284 | prm->hw_ptr = 0; | |
285 | ||
286 | switch (cmd) { | |
287 | case SNDRV_PCM_TRIGGER_START: | |
288 | case SNDRV_PCM_TRIGGER_RESUME: | |
289 | prm->ss = substream; | |
290 | break; | |
291 | case SNDRV_PCM_TRIGGER_STOP: | |
292 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
293 | prm->ss = NULL; | |
294 | break; | |
295 | default: | |
296 | err = -EINVAL; | |
297 | } | |
298 | ||
299 | spin_unlock_irqrestore(&prm->lock, flags); | |
300 | ||
301 | /* Clear buffer after Play stops */ | |
302 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !prm->ss) | |
303 | memset(prm->rbuf, 0, prm->max_psize * USB_XFERS); | |
304 | ||
305 | return err; | |
306 | } | |
307 | ||
308 | static snd_pcm_uframes_t uac2_pcm_pointer(struct snd_pcm_substream *substream) | |
309 | { | |
310 | struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream); | |
311 | struct uac2_rtd_params *prm; | |
312 | ||
313 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
314 | prm = &uac2->p_prm; | |
315 | else | |
316 | prm = &uac2->c_prm; | |
317 | ||
318 | return bytes_to_frames(substream->runtime, prm->hw_ptr); | |
319 | } | |
320 | ||
321 | static int uac2_pcm_hw_params(struct snd_pcm_substream *substream, | |
322 | struct snd_pcm_hw_params *hw_params) | |
323 | { | |
324 | struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream); | |
325 | struct uac2_rtd_params *prm; | |
326 | int err; | |
327 | ||
328 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
329 | prm = &uac2->p_prm; | |
330 | else | |
331 | prm = &uac2->c_prm; | |
332 | ||
333 | err = snd_pcm_lib_malloc_pages(substream, | |
334 | params_buffer_bytes(hw_params)); | |
335 | if (err >= 0) { | |
336 | prm->dma_bytes = substream->runtime->dma_bytes; | |
337 | prm->dma_area = substream->runtime->dma_area; | |
338 | prm->period_size = params_period_bytes(hw_params); | |
339 | } | |
340 | ||
341 | return err; | |
342 | } | |
343 | ||
344 | static int uac2_pcm_hw_free(struct snd_pcm_substream *substream) | |
345 | { | |
346 | struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream); | |
347 | struct uac2_rtd_params *prm; | |
348 | ||
349 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
350 | prm = &uac2->p_prm; | |
351 | else | |
352 | prm = &uac2->c_prm; | |
353 | ||
354 | prm->dma_area = NULL; | |
355 | prm->dma_bytes = 0; | |
356 | prm->period_size = 0; | |
357 | ||
358 | return snd_pcm_lib_free_pages(substream); | |
359 | } | |
360 | ||
361 | static int uac2_pcm_open(struct snd_pcm_substream *substream) | |
362 | { | |
363 | struct snd_uac2_chip *uac2 = snd_pcm_substream_chip(substream); | |
364 | struct snd_pcm_runtime *runtime = substream->runtime; | |
f8f93d24 AP |
365 | struct audio_dev *audio_dev; |
366 | struct f_uac2_opts *opts; | |
367 | int p_ssize, c_ssize; | |
368 | int p_srate, c_srate; | |
369 | int p_chmask, c_chmask; | |
370 | ||
371 | audio_dev = uac2_to_agdev(uac2); | |
372 | opts = container_of(audio_dev->func.fi, struct f_uac2_opts, func_inst); | |
373 | p_ssize = opts->p_ssize; | |
374 | c_ssize = opts->c_ssize; | |
375 | p_srate = opts->p_srate; | |
376 | c_srate = opts->c_srate; | |
377 | p_chmask = opts->p_chmask; | |
378 | c_chmask = opts->c_chmask; | |
9bb87f16 | 379 | uac2->p_residue = 0; |
132fcb46 JB |
380 | |
381 | runtime->hw = uac2_pcm_hardware; | |
382 | ||
383 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
384 | spin_lock_init(&uac2->p_prm.lock); | |
385 | runtime->hw.rate_min = p_srate; | |
55f7840a SR |
386 | switch (p_ssize) { |
387 | case 3: | |
388 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S24_3LE; | |
389 | break; | |
390 | case 4: | |
391 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S32_LE; | |
392 | break; | |
393 | default: | |
394 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; | |
395 | break; | |
396 | } | |
132fcb46 JB |
397 | runtime->hw.channels_min = num_channels(p_chmask); |
398 | runtime->hw.period_bytes_min = 2 * uac2->p_prm.max_psize | |
399 | / runtime->hw.periods_min; | |
400 | } else { | |
401 | spin_lock_init(&uac2->c_prm.lock); | |
402 | runtime->hw.rate_min = c_srate; | |
55f7840a SR |
403 | switch (c_ssize) { |
404 | case 3: | |
405 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S24_3LE; | |
406 | break; | |
407 | case 4: | |
408 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S32_LE; | |
409 | break; | |
410 | default: | |
411 | runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE; | |
412 | break; | |
413 | } | |
132fcb46 JB |
414 | runtime->hw.channels_min = num_channels(c_chmask); |
415 | runtime->hw.period_bytes_min = 2 * uac2->c_prm.max_psize | |
416 | / runtime->hw.periods_min; | |
417 | } | |
418 | ||
419 | runtime->hw.rate_max = runtime->hw.rate_min; | |
420 | runtime->hw.channels_max = runtime->hw.channels_min; | |
421 | ||
422 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | /* ALSA cries without these function pointers */ | |
428 | static int uac2_pcm_null(struct snd_pcm_substream *substream) | |
429 | { | |
430 | return 0; | |
431 | } | |
432 | ||
433 | static struct snd_pcm_ops uac2_pcm_ops = { | |
434 | .open = uac2_pcm_open, | |
435 | .close = uac2_pcm_null, | |
436 | .ioctl = snd_pcm_lib_ioctl, | |
437 | .hw_params = uac2_pcm_hw_params, | |
438 | .hw_free = uac2_pcm_hw_free, | |
439 | .trigger = uac2_pcm_trigger, | |
440 | .pointer = uac2_pcm_pointer, | |
441 | .prepare = uac2_pcm_null, | |
442 | }; | |
443 | ||
41ac7b3a | 444 | static int snd_uac2_probe(struct platform_device *pdev) |
132fcb46 JB |
445 | { |
446 | struct snd_uac2_chip *uac2 = pdev_to_uac2(pdev); | |
447 | struct snd_card *card; | |
448 | struct snd_pcm *pcm; | |
f8f93d24 AP |
449 | struct audio_dev *audio_dev; |
450 | struct f_uac2_opts *opts; | |
132fcb46 | 451 | int err; |
f8f93d24 AP |
452 | int p_chmask, c_chmask; |
453 | ||
454 | audio_dev = uac2_to_agdev(uac2); | |
455 | opts = container_of(audio_dev->func.fi, struct f_uac2_opts, func_inst); | |
456 | p_chmask = opts->p_chmask; | |
457 | c_chmask = opts->c_chmask; | |
132fcb46 JB |
458 | |
459 | /* Choose any slot, with no id */ | |
13345095 | 460 | err = snd_card_new(&pdev->dev, -1, NULL, THIS_MODULE, 0, &card); |
132fcb46 JB |
461 | if (err < 0) |
462 | return err; | |
463 | ||
464 | uac2->card = card; | |
465 | ||
466 | /* | |
467 | * Create first PCM device | |
468 | * Create a substream only for non-zero channel streams | |
469 | */ | |
470 | err = snd_pcm_new(uac2->card, "UAC2 PCM", 0, | |
471 | p_chmask ? 1 : 0, c_chmask ? 1 : 0, &pcm); | |
472 | if (err < 0) | |
473 | goto snd_fail; | |
474 | ||
475 | strcpy(pcm->name, "UAC2 PCM"); | |
476 | pcm->private_data = uac2; | |
477 | ||
478 | uac2->pcm = pcm; | |
479 | ||
480 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &uac2_pcm_ops); | |
481 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &uac2_pcm_ops); | |
482 | ||
483 | strcpy(card->driver, "UAC2_Gadget"); | |
484 | strcpy(card->shortname, "UAC2_Gadget"); | |
485 | sprintf(card->longname, "UAC2_Gadget %i", pdev->id); | |
486 | ||
132fcb46 JB |
487 | snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, |
488 | snd_dma_continuous_data(GFP_KERNEL), 0, BUFF_SIZE_MAX); | |
489 | ||
490 | err = snd_card_register(card); | |
491 | if (!err) { | |
492 | platform_set_drvdata(pdev, card); | |
493 | return 0; | |
494 | } | |
495 | ||
496 | snd_fail: | |
497 | snd_card_free(card); | |
498 | ||
499 | uac2->pcm = NULL; | |
500 | uac2->card = NULL; | |
501 | ||
502 | return err; | |
503 | } | |
504 | ||
1e1a27c3 | 505 | static int snd_uac2_remove(struct platform_device *pdev) |
132fcb46 JB |
506 | { |
507 | struct snd_card *card = platform_get_drvdata(pdev); | |
508 | ||
132fcb46 JB |
509 | if (card) |
510 | return snd_card_free(card); | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
de1e6e79 FB |
515 | static void snd_uac2_release(struct device *dev) |
516 | { | |
517 | dev_dbg(dev, "releasing '%s'\n", dev_name(dev)); | |
518 | } | |
519 | ||
132fcb46 JB |
520 | static int alsa_uac2_init(struct audio_dev *agdev) |
521 | { | |
522 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
523 | int err; | |
524 | ||
525 | uac2->pdrv.probe = snd_uac2_probe; | |
526 | uac2->pdrv.remove = snd_uac2_remove; | |
527 | uac2->pdrv.driver.name = uac2_name; | |
528 | ||
529 | uac2->pdev.id = 0; | |
530 | uac2->pdev.name = uac2_name; | |
de1e6e79 | 531 | uac2->pdev.dev.release = snd_uac2_release; |
132fcb46 JB |
532 | |
533 | /* Register snd_uac2 driver */ | |
534 | err = platform_driver_register(&uac2->pdrv); | |
535 | if (err) | |
536 | return err; | |
537 | ||
538 | /* Register snd_uac2 device */ | |
539 | err = platform_device_register(&uac2->pdev); | |
540 | if (err) | |
541 | platform_driver_unregister(&uac2->pdrv); | |
542 | ||
543 | return err; | |
544 | } | |
545 | ||
546 | static void alsa_uac2_exit(struct audio_dev *agdev) | |
547 | { | |
548 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
549 | ||
550 | platform_driver_unregister(&uac2->pdrv); | |
551 | platform_device_unregister(&uac2->pdev); | |
552 | } | |
553 | ||
554 | ||
555 | /* --------- USB Function Interface ------------- */ | |
556 | ||
557 | enum { | |
558 | STR_ASSOC, | |
559 | STR_IF_CTRL, | |
560 | STR_CLKSRC_IN, | |
561 | STR_CLKSRC_OUT, | |
562 | STR_USB_IT, | |
563 | STR_IO_IT, | |
564 | STR_USB_OT, | |
565 | STR_IO_OT, | |
566 | STR_AS_OUT_ALT0, | |
567 | STR_AS_OUT_ALT1, | |
568 | STR_AS_IN_ALT0, | |
569 | STR_AS_IN_ALT1, | |
570 | }; | |
571 | ||
132fcb46 JB |
572 | static char clksrc_in[8]; |
573 | static char clksrc_out[8]; | |
132fcb46 JB |
574 | |
575 | static struct usb_string strings_fn[] = { | |
b36c3479 SAS |
576 | [STR_ASSOC].s = "Source/Sink", |
577 | [STR_IF_CTRL].s = "Topology Control", | |
132fcb46 JB |
578 | [STR_CLKSRC_IN].s = clksrc_in, |
579 | [STR_CLKSRC_OUT].s = clksrc_out, | |
b36c3479 SAS |
580 | [STR_USB_IT].s = "USBH Out", |
581 | [STR_IO_IT].s = "USBD Out", | |
582 | [STR_USB_OT].s = "USBH In", | |
583 | [STR_IO_OT].s = "USBD In", | |
584 | [STR_AS_OUT_ALT0].s = "Playback Inactive", | |
585 | [STR_AS_OUT_ALT1].s = "Playback Active", | |
586 | [STR_AS_IN_ALT0].s = "Capture Inactive", | |
587 | [STR_AS_IN_ALT1].s = "Capture Active", | |
132fcb46 JB |
588 | { }, |
589 | }; | |
590 | ||
591 | static struct usb_gadget_strings str_fn = { | |
592 | .language = 0x0409, /* en-us */ | |
593 | .strings = strings_fn, | |
594 | }; | |
595 | ||
596 | static struct usb_gadget_strings *fn_strings[] = { | |
597 | &str_fn, | |
598 | NULL, | |
599 | }; | |
600 | ||
601 | static struct usb_qualifier_descriptor devqual_desc = { | |
602 | .bLength = sizeof devqual_desc, | |
603 | .bDescriptorType = USB_DT_DEVICE_QUALIFIER, | |
604 | ||
605 | .bcdUSB = cpu_to_le16(0x200), | |
606 | .bDeviceClass = USB_CLASS_MISC, | |
607 | .bDeviceSubClass = 0x02, | |
608 | .bDeviceProtocol = 0x01, | |
609 | .bNumConfigurations = 1, | |
610 | .bRESERVED = 0, | |
611 | }; | |
612 | ||
613 | static struct usb_interface_assoc_descriptor iad_desc = { | |
614 | .bLength = sizeof iad_desc, | |
615 | .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, | |
616 | ||
617 | .bFirstInterface = 0, | |
618 | .bInterfaceCount = 3, | |
619 | .bFunctionClass = USB_CLASS_AUDIO, | |
620 | .bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED, | |
621 | .bFunctionProtocol = UAC_VERSION_2, | |
622 | }; | |
623 | ||
624 | /* Audio Control Interface */ | |
625 | static struct usb_interface_descriptor std_ac_if_desc = { | |
626 | .bLength = sizeof std_ac_if_desc, | |
627 | .bDescriptorType = USB_DT_INTERFACE, | |
628 | ||
629 | .bAlternateSetting = 0, | |
630 | .bNumEndpoints = 0, | |
631 | .bInterfaceClass = USB_CLASS_AUDIO, | |
632 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, | |
633 | .bInterfaceProtocol = UAC_VERSION_2, | |
634 | }; | |
635 | ||
636 | /* Clock source for IN traffic */ | |
ef16e7c8 | 637 | static struct uac_clock_source_descriptor in_clk_src_desc = { |
132fcb46 JB |
638 | .bLength = sizeof in_clk_src_desc, |
639 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
640 | ||
641 | .bDescriptorSubtype = UAC2_CLOCK_SOURCE, | |
642 | .bClockID = USB_IN_CLK_ID, | |
643 | .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, | |
644 | .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL), | |
645 | .bAssocTerminal = 0, | |
646 | }; | |
647 | ||
648 | /* Clock source for OUT traffic */ | |
ef16e7c8 | 649 | static struct uac_clock_source_descriptor out_clk_src_desc = { |
132fcb46 JB |
650 | .bLength = sizeof out_clk_src_desc, |
651 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
652 | ||
653 | .bDescriptorSubtype = UAC2_CLOCK_SOURCE, | |
654 | .bClockID = USB_OUT_CLK_ID, | |
655 | .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, | |
656 | .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL), | |
657 | .bAssocTerminal = 0, | |
658 | }; | |
659 | ||
660 | /* Input Terminal for USB_OUT */ | |
ef16e7c8 | 661 | static struct uac2_input_terminal_descriptor usb_out_it_desc = { |
132fcb46 JB |
662 | .bLength = sizeof usb_out_it_desc, |
663 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
664 | ||
665 | .bDescriptorSubtype = UAC_INPUT_TERMINAL, | |
666 | .bTerminalID = USB_OUT_IT_ID, | |
667 | .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), | |
668 | .bAssocTerminal = 0, | |
669 | .bCSourceID = USB_OUT_CLK_ID, | |
670 | .iChannelNames = 0, | |
671 | .bmControls = (CONTROL_RDWR << COPY_CTRL), | |
672 | }; | |
673 | ||
674 | /* Input Terminal for I/O-In */ | |
ef16e7c8 | 675 | static struct uac2_input_terminal_descriptor io_in_it_desc = { |
132fcb46 JB |
676 | .bLength = sizeof io_in_it_desc, |
677 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
678 | ||
679 | .bDescriptorSubtype = UAC_INPUT_TERMINAL, | |
680 | .bTerminalID = IO_IN_IT_ID, | |
681 | .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED), | |
682 | .bAssocTerminal = 0, | |
683 | .bCSourceID = USB_IN_CLK_ID, | |
684 | .iChannelNames = 0, | |
685 | .bmControls = (CONTROL_RDWR << COPY_CTRL), | |
686 | }; | |
687 | ||
688 | /* Ouput Terminal for USB_IN */ | |
ef16e7c8 | 689 | static struct uac2_output_terminal_descriptor usb_in_ot_desc = { |
132fcb46 JB |
690 | .bLength = sizeof usb_in_ot_desc, |
691 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
692 | ||
693 | .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, | |
694 | .bTerminalID = USB_IN_OT_ID, | |
695 | .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), | |
696 | .bAssocTerminal = 0, | |
697 | .bSourceID = IO_IN_IT_ID, | |
698 | .bCSourceID = USB_IN_CLK_ID, | |
699 | .bmControls = (CONTROL_RDWR << COPY_CTRL), | |
700 | }; | |
701 | ||
702 | /* Ouput Terminal for I/O-Out */ | |
ef16e7c8 | 703 | static struct uac2_output_terminal_descriptor io_out_ot_desc = { |
132fcb46 JB |
704 | .bLength = sizeof io_out_ot_desc, |
705 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
706 | ||
707 | .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, | |
708 | .bTerminalID = IO_OUT_OT_ID, | |
709 | .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED), | |
710 | .bAssocTerminal = 0, | |
711 | .bSourceID = USB_OUT_IT_ID, | |
712 | .bCSourceID = USB_OUT_CLK_ID, | |
713 | .bmControls = (CONTROL_RDWR << COPY_CTRL), | |
714 | }; | |
715 | ||
ef16e7c8 | 716 | static struct uac2_ac_header_descriptor ac_hdr_desc = { |
132fcb46 JB |
717 | .bLength = sizeof ac_hdr_desc, |
718 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
719 | ||
720 | .bDescriptorSubtype = UAC_MS_HEADER, | |
721 | .bcdADC = cpu_to_le16(0x200), | |
722 | .bCategory = UAC2_FUNCTION_IO_BOX, | |
723 | .wTotalLength = sizeof in_clk_src_desc + sizeof out_clk_src_desc | |
724 | + sizeof usb_out_it_desc + sizeof io_in_it_desc | |
725 | + sizeof usb_in_ot_desc + sizeof io_out_ot_desc, | |
726 | .bmControls = 0, | |
727 | }; | |
728 | ||
729 | /* Audio Streaming OUT Interface - Alt0 */ | |
730 | static struct usb_interface_descriptor std_as_out_if0_desc = { | |
731 | .bLength = sizeof std_as_out_if0_desc, | |
732 | .bDescriptorType = USB_DT_INTERFACE, | |
733 | ||
734 | .bAlternateSetting = 0, | |
735 | .bNumEndpoints = 0, | |
736 | .bInterfaceClass = USB_CLASS_AUDIO, | |
737 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, | |
738 | .bInterfaceProtocol = UAC_VERSION_2, | |
739 | }; | |
740 | ||
741 | /* Audio Streaming OUT Interface - Alt1 */ | |
742 | static struct usb_interface_descriptor std_as_out_if1_desc = { | |
743 | .bLength = sizeof std_as_out_if1_desc, | |
744 | .bDescriptorType = USB_DT_INTERFACE, | |
745 | ||
746 | .bAlternateSetting = 1, | |
747 | .bNumEndpoints = 1, | |
748 | .bInterfaceClass = USB_CLASS_AUDIO, | |
749 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, | |
750 | .bInterfaceProtocol = UAC_VERSION_2, | |
751 | }; | |
752 | ||
753 | /* Audio Stream OUT Intface Desc */ | |
ef16e7c8 | 754 | static struct uac2_as_header_descriptor as_out_hdr_desc = { |
132fcb46 JB |
755 | .bLength = sizeof as_out_hdr_desc, |
756 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
757 | ||
758 | .bDescriptorSubtype = UAC_AS_GENERAL, | |
759 | .bTerminalLink = USB_OUT_IT_ID, | |
760 | .bmControls = 0, | |
761 | .bFormatType = UAC_FORMAT_TYPE_I, | |
762 | .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), | |
763 | .iChannelNames = 0, | |
764 | }; | |
765 | ||
766 | /* Audio USB_OUT Format */ | |
ef16e7c8 | 767 | static struct uac2_format_type_i_descriptor as_out_fmt1_desc = { |
132fcb46 JB |
768 | .bLength = sizeof as_out_fmt1_desc, |
769 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
770 | .bDescriptorSubtype = UAC_FORMAT_TYPE, | |
771 | .bFormatType = UAC_FORMAT_TYPE_I, | |
772 | }; | |
773 | ||
774 | /* STD AS ISO OUT Endpoint */ | |
ef16e7c8 | 775 | static struct usb_endpoint_descriptor fs_epout_desc = { |
132fcb46 JB |
776 | .bLength = USB_DT_ENDPOINT_SIZE, |
777 | .bDescriptorType = USB_DT_ENDPOINT, | |
778 | ||
779 | .bEndpointAddress = USB_DIR_OUT, | |
780 | .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, | |
703a303c | 781 | .wMaxPacketSize = cpu_to_le16(1023), |
132fcb46 JB |
782 | .bInterval = 1, |
783 | }; | |
784 | ||
ef16e7c8 | 785 | static struct usb_endpoint_descriptor hs_epout_desc = { |
132fcb46 JB |
786 | .bLength = USB_DT_ENDPOINT_SIZE, |
787 | .bDescriptorType = USB_DT_ENDPOINT, | |
788 | ||
789 | .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, | |
703a303c | 790 | .wMaxPacketSize = cpu_to_le16(1024), |
132fcb46 JB |
791 | .bInterval = 4, |
792 | }; | |
793 | ||
794 | /* CS AS ISO OUT Endpoint */ | |
795 | static struct uac2_iso_endpoint_descriptor as_iso_out_desc = { | |
796 | .bLength = sizeof as_iso_out_desc, | |
797 | .bDescriptorType = USB_DT_CS_ENDPOINT, | |
798 | ||
799 | .bDescriptorSubtype = UAC_EP_GENERAL, | |
800 | .bmAttributes = 0, | |
801 | .bmControls = 0, | |
802 | .bLockDelayUnits = 0, | |
803 | .wLockDelay = 0, | |
804 | }; | |
805 | ||
806 | /* Audio Streaming IN Interface - Alt0 */ | |
807 | static struct usb_interface_descriptor std_as_in_if0_desc = { | |
808 | .bLength = sizeof std_as_in_if0_desc, | |
809 | .bDescriptorType = USB_DT_INTERFACE, | |
810 | ||
811 | .bAlternateSetting = 0, | |
812 | .bNumEndpoints = 0, | |
813 | .bInterfaceClass = USB_CLASS_AUDIO, | |
814 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, | |
815 | .bInterfaceProtocol = UAC_VERSION_2, | |
816 | }; | |
817 | ||
818 | /* Audio Streaming IN Interface - Alt1 */ | |
819 | static struct usb_interface_descriptor std_as_in_if1_desc = { | |
820 | .bLength = sizeof std_as_in_if1_desc, | |
821 | .bDescriptorType = USB_DT_INTERFACE, | |
822 | ||
823 | .bAlternateSetting = 1, | |
824 | .bNumEndpoints = 1, | |
825 | .bInterfaceClass = USB_CLASS_AUDIO, | |
826 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, | |
827 | .bInterfaceProtocol = UAC_VERSION_2, | |
828 | }; | |
829 | ||
830 | /* Audio Stream IN Intface Desc */ | |
ef16e7c8 | 831 | static struct uac2_as_header_descriptor as_in_hdr_desc = { |
132fcb46 JB |
832 | .bLength = sizeof as_in_hdr_desc, |
833 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
834 | ||
835 | .bDescriptorSubtype = UAC_AS_GENERAL, | |
836 | .bTerminalLink = USB_IN_OT_ID, | |
837 | .bmControls = 0, | |
838 | .bFormatType = UAC_FORMAT_TYPE_I, | |
839 | .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), | |
840 | .iChannelNames = 0, | |
841 | }; | |
842 | ||
843 | /* Audio USB_IN Format */ | |
ef16e7c8 | 844 | static struct uac2_format_type_i_descriptor as_in_fmt1_desc = { |
132fcb46 JB |
845 | .bLength = sizeof as_in_fmt1_desc, |
846 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
847 | .bDescriptorSubtype = UAC_FORMAT_TYPE, | |
848 | .bFormatType = UAC_FORMAT_TYPE_I, | |
849 | }; | |
850 | ||
851 | /* STD AS ISO IN Endpoint */ | |
ef16e7c8 | 852 | static struct usb_endpoint_descriptor fs_epin_desc = { |
132fcb46 JB |
853 | .bLength = USB_DT_ENDPOINT_SIZE, |
854 | .bDescriptorType = USB_DT_ENDPOINT, | |
855 | ||
856 | .bEndpointAddress = USB_DIR_IN, | |
857 | .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, | |
703a303c | 858 | .wMaxPacketSize = cpu_to_le16(1023), |
132fcb46 JB |
859 | .bInterval = 1, |
860 | }; | |
861 | ||
ef16e7c8 | 862 | static struct usb_endpoint_descriptor hs_epin_desc = { |
132fcb46 JB |
863 | .bLength = USB_DT_ENDPOINT_SIZE, |
864 | .bDescriptorType = USB_DT_ENDPOINT, | |
865 | ||
866 | .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, | |
703a303c | 867 | .wMaxPacketSize = cpu_to_le16(1024), |
132fcb46 JB |
868 | .bInterval = 4, |
869 | }; | |
870 | ||
871 | /* CS AS ISO IN Endpoint */ | |
872 | static struct uac2_iso_endpoint_descriptor as_iso_in_desc = { | |
873 | .bLength = sizeof as_iso_in_desc, | |
874 | .bDescriptorType = USB_DT_CS_ENDPOINT, | |
875 | ||
876 | .bDescriptorSubtype = UAC_EP_GENERAL, | |
877 | .bmAttributes = 0, | |
878 | .bmControls = 0, | |
879 | .bLockDelayUnits = 0, | |
880 | .wLockDelay = 0, | |
881 | }; | |
882 | ||
883 | static struct usb_descriptor_header *fs_audio_desc[] = { | |
884 | (struct usb_descriptor_header *)&iad_desc, | |
885 | (struct usb_descriptor_header *)&std_ac_if_desc, | |
886 | ||
887 | (struct usb_descriptor_header *)&ac_hdr_desc, | |
888 | (struct usb_descriptor_header *)&in_clk_src_desc, | |
889 | (struct usb_descriptor_header *)&out_clk_src_desc, | |
890 | (struct usb_descriptor_header *)&usb_out_it_desc, | |
891 | (struct usb_descriptor_header *)&io_in_it_desc, | |
892 | (struct usb_descriptor_header *)&usb_in_ot_desc, | |
893 | (struct usb_descriptor_header *)&io_out_ot_desc, | |
894 | ||
895 | (struct usb_descriptor_header *)&std_as_out_if0_desc, | |
896 | (struct usb_descriptor_header *)&std_as_out_if1_desc, | |
897 | ||
898 | (struct usb_descriptor_header *)&as_out_hdr_desc, | |
899 | (struct usb_descriptor_header *)&as_out_fmt1_desc, | |
900 | (struct usb_descriptor_header *)&fs_epout_desc, | |
901 | (struct usb_descriptor_header *)&as_iso_out_desc, | |
902 | ||
903 | (struct usb_descriptor_header *)&std_as_in_if0_desc, | |
904 | (struct usb_descriptor_header *)&std_as_in_if1_desc, | |
905 | ||
906 | (struct usb_descriptor_header *)&as_in_hdr_desc, | |
907 | (struct usb_descriptor_header *)&as_in_fmt1_desc, | |
908 | (struct usb_descriptor_header *)&fs_epin_desc, | |
909 | (struct usb_descriptor_header *)&as_iso_in_desc, | |
910 | NULL, | |
911 | }; | |
912 | ||
913 | static struct usb_descriptor_header *hs_audio_desc[] = { | |
914 | (struct usb_descriptor_header *)&iad_desc, | |
915 | (struct usb_descriptor_header *)&std_ac_if_desc, | |
916 | ||
917 | (struct usb_descriptor_header *)&ac_hdr_desc, | |
918 | (struct usb_descriptor_header *)&in_clk_src_desc, | |
919 | (struct usb_descriptor_header *)&out_clk_src_desc, | |
920 | (struct usb_descriptor_header *)&usb_out_it_desc, | |
921 | (struct usb_descriptor_header *)&io_in_it_desc, | |
922 | (struct usb_descriptor_header *)&usb_in_ot_desc, | |
923 | (struct usb_descriptor_header *)&io_out_ot_desc, | |
924 | ||
925 | (struct usb_descriptor_header *)&std_as_out_if0_desc, | |
926 | (struct usb_descriptor_header *)&std_as_out_if1_desc, | |
927 | ||
928 | (struct usb_descriptor_header *)&as_out_hdr_desc, | |
929 | (struct usb_descriptor_header *)&as_out_fmt1_desc, | |
930 | (struct usb_descriptor_header *)&hs_epout_desc, | |
931 | (struct usb_descriptor_header *)&as_iso_out_desc, | |
932 | ||
933 | (struct usb_descriptor_header *)&std_as_in_if0_desc, | |
934 | (struct usb_descriptor_header *)&std_as_in_if1_desc, | |
935 | ||
936 | (struct usb_descriptor_header *)&as_in_hdr_desc, | |
937 | (struct usb_descriptor_header *)&as_in_fmt1_desc, | |
938 | (struct usb_descriptor_header *)&hs_epin_desc, | |
939 | (struct usb_descriptor_header *)&as_iso_in_desc, | |
940 | NULL, | |
941 | }; | |
942 | ||
943 | struct cntrl_cur_lay3 { | |
944 | __u32 dCUR; | |
945 | }; | |
946 | ||
947 | struct cntrl_range_lay3 { | |
948 | __u16 wNumSubRanges; | |
949 | __u32 dMIN; | |
950 | __u32 dMAX; | |
951 | __u32 dRES; | |
952 | } __packed; | |
953 | ||
954 | static inline void | |
955 | free_ep(struct uac2_rtd_params *prm, struct usb_ep *ep) | |
956 | { | |
eb127cb5 | 957 | struct snd_uac2_chip *uac2 = prm->uac2; |
132fcb46 JB |
958 | int i; |
959 | ||
f3bb7b29 FB |
960 | if (!prm->ep_enabled) |
961 | return; | |
962 | ||
132fcb46 JB |
963 | prm->ep_enabled = false; |
964 | ||
965 | for (i = 0; i < USB_XFERS; i++) { | |
966 | if (prm->ureq[i].req) { | |
967 | usb_ep_dequeue(ep, prm->ureq[i].req); | |
968 | usb_ep_free_request(ep, prm->ureq[i].req); | |
969 | prm->ureq[i].req = NULL; | |
970 | } | |
971 | } | |
972 | ||
973 | if (usb_ep_disable(ep)) | |
974 | dev_err(&uac2->pdev.dev, | |
975 | "%s:%d Error!\n", __func__, __LINE__); | |
976 | } | |
977 | ||
913e4a90 PC |
978 | static void set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts, |
979 | struct usb_endpoint_descriptor *ep_desc, | |
980 | unsigned int factor, bool is_playback) | |
981 | { | |
982 | int chmask, srate, ssize; | |
983 | u16 max_packet_size; | |
984 | ||
985 | if (is_playback) { | |
986 | chmask = uac2_opts->p_chmask; | |
987 | srate = uac2_opts->p_srate; | |
988 | ssize = uac2_opts->p_ssize; | |
989 | } else { | |
990 | chmask = uac2_opts->c_chmask; | |
991 | srate = uac2_opts->c_srate; | |
992 | ssize = uac2_opts->c_ssize; | |
993 | } | |
994 | ||
995 | max_packet_size = num_channels(chmask) * ssize * | |
996 | DIV_ROUND_UP(srate, factor / (1 << (ep_desc->bInterval - 1))); | |
0f4315a8 | 997 | ep_desc->wMaxPacketSize = cpu_to_le16(min_t(u16, max_packet_size, |
913e4a90 PC |
998 | le16_to_cpu(ep_desc->wMaxPacketSize))); |
999 | } | |
1000 | ||
f8f93d24 | 1001 | static int |
132fcb46 JB |
1002 | afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) |
1003 | { | |
1004 | struct audio_dev *agdev = func_to_agdev(fn); | |
1005 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
1006 | struct usb_composite_dev *cdev = cfg->cdev; | |
1007 | struct usb_gadget *gadget = cdev->gadget; | |
a8147dab | 1008 | struct device *dev = &uac2->pdev.dev; |
132fcb46 | 1009 | struct uac2_rtd_params *prm; |
f8f93d24 | 1010 | struct f_uac2_opts *uac2_opts; |
f408757f | 1011 | struct usb_string *us; |
132fcb46 JB |
1012 | int ret; |
1013 | ||
f8f93d24 | 1014 | uac2_opts = container_of(fn->fi, struct f_uac2_opts, func_inst); |
f8f93d24 | 1015 | |
f408757f AP |
1016 | us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn)); |
1017 | if (IS_ERR(us)) | |
1018 | return PTR_ERR(us); | |
1019 | iad_desc.iFunction = us[STR_ASSOC].id; | |
1020 | std_ac_if_desc.iInterface = us[STR_IF_CTRL].id; | |
1021 | in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id; | |
1022 | out_clk_src_desc.iClockSource = us[STR_CLKSRC_OUT].id; | |
1023 | usb_out_it_desc.iTerminal = us[STR_USB_IT].id; | |
1024 | io_in_it_desc.iTerminal = us[STR_IO_IT].id; | |
1025 | usb_in_ot_desc.iTerminal = us[STR_USB_OT].id; | |
1026 | io_out_ot_desc.iTerminal = us[STR_IO_OT].id; | |
1027 | std_as_out_if0_desc.iInterface = us[STR_AS_OUT_ALT0].id; | |
1028 | std_as_out_if1_desc.iInterface = us[STR_AS_OUT_ALT1].id; | |
1029 | std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id; | |
1030 | std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id; | |
1031 | ||
f8f93d24 | 1032 | |
f8f93d24 AP |
1033 | /* Initialize the configurable parameters */ |
1034 | usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask); | |
1035 | usb_out_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); | |
1036 | io_in_it_desc.bNrChannels = num_channels(uac2_opts->p_chmask); | |
1037 | io_in_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); | |
1038 | as_out_hdr_desc.bNrChannels = num_channels(uac2_opts->c_chmask); | |
1039 | as_out_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); | |
1040 | as_in_hdr_desc.bNrChannels = num_channels(uac2_opts->p_chmask); | |
1041 | as_in_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); | |
1042 | as_out_fmt1_desc.bSubslotSize = uac2_opts->c_ssize; | |
1043 | as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8; | |
1044 | as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize; | |
1045 | as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8; | |
1046 | ||
1047 | snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", uac2_opts->p_srate); | |
1048 | snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", uac2_opts->c_srate); | |
f8f93d24 | 1049 | |
132fcb46 JB |
1050 | ret = usb_interface_id(cfg, fn); |
1051 | if (ret < 0) { | |
a8147dab | 1052 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
132fcb46 JB |
1053 | return ret; |
1054 | } | |
1055 | std_ac_if_desc.bInterfaceNumber = ret; | |
4ce63571 SAS |
1056 | agdev->ac_intf = ret; |
1057 | agdev->ac_alt = 0; | |
132fcb46 JB |
1058 | |
1059 | ret = usb_interface_id(cfg, fn); | |
1060 | if (ret < 0) { | |
a8147dab | 1061 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
132fcb46 JB |
1062 | return ret; |
1063 | } | |
1064 | std_as_out_if0_desc.bInterfaceNumber = ret; | |
1065 | std_as_out_if1_desc.bInterfaceNumber = ret; | |
4ce63571 SAS |
1066 | agdev->as_out_intf = ret; |
1067 | agdev->as_out_alt = 0; | |
132fcb46 JB |
1068 | |
1069 | ret = usb_interface_id(cfg, fn); | |
1070 | if (ret < 0) { | |
a8147dab | 1071 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
132fcb46 JB |
1072 | return ret; |
1073 | } | |
1074 | std_as_in_if0_desc.bInterfaceNumber = ret; | |
1075 | std_as_in_if1_desc.bInterfaceNumber = ret; | |
4ce63571 SAS |
1076 | agdev->as_in_intf = ret; |
1077 | agdev->as_in_alt = 0; | |
132fcb46 JB |
1078 | |
1079 | agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); | |
391aa852 | 1080 | if (!agdev->out_ep) { |
a8147dab | 1081 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
391aa852 SAS |
1082 | goto err; |
1083 | } | |
132fcb46 JB |
1084 | |
1085 | agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc); | |
391aa852 | 1086 | if (!agdev->in_ep) { |
a8147dab | 1087 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
391aa852 SAS |
1088 | goto err; |
1089 | } | |
132fcb46 | 1090 | |
eb127cb5 JB |
1091 | uac2->p_prm.uac2 = uac2; |
1092 | uac2->c_prm.uac2 = uac2; | |
1093 | ||
913e4a90 PC |
1094 | /* Calculate wMaxPacketSize according to audio bandwidth */ |
1095 | set_ep_max_packet_size(uac2_opts, &fs_epin_desc, 1000, true); | |
1096 | set_ep_max_packet_size(uac2_opts, &fs_epout_desc, 1000, false); | |
1097 | set_ep_max_packet_size(uac2_opts, &hs_epin_desc, 8000, true); | |
1098 | set_ep_max_packet_size(uac2_opts, &hs_epout_desc, 8000, false); | |
1099 | ||
132fcb46 | 1100 | hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; |
132fcb46 | 1101 | hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; |
132fcb46 | 1102 | |
eaef50c7 JY |
1103 | ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL, |
1104 | NULL); | |
10287bae SAS |
1105 | if (ret) |
1106 | goto err; | |
132fcb46 JB |
1107 | |
1108 | prm = &agdev->uac2.c_prm; | |
1109 | prm->max_psize = hs_epout_desc.wMaxPacketSize; | |
1110 | prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL); | |
1111 | if (!prm->rbuf) { | |
1112 | prm->max_psize = 0; | |
d12a8727 | 1113 | goto err_free_descs; |
132fcb46 JB |
1114 | } |
1115 | ||
1116 | prm = &agdev->uac2.p_prm; | |
1117 | prm->max_psize = hs_epin_desc.wMaxPacketSize; | |
1118 | prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL); | |
1119 | if (!prm->rbuf) { | |
1120 | prm->max_psize = 0; | |
d12a8727 | 1121 | goto err_free_descs; |
132fcb46 JB |
1122 | } |
1123 | ||
391aa852 SAS |
1124 | ret = alsa_uac2_init(agdev); |
1125 | if (ret) | |
d12a8727 | 1126 | goto err_free_descs; |
391aa852 | 1127 | return 0; |
d12a8727 PM |
1128 | |
1129 | err_free_descs: | |
1130 | usb_free_all_descriptors(fn); | |
391aa852 SAS |
1131 | err: |
1132 | kfree(agdev->uac2.p_prm.rbuf); | |
1133 | kfree(agdev->uac2.c_prm.rbuf); | |
391aa852 | 1134 | return -EINVAL; |
132fcb46 JB |
1135 | } |
1136 | ||
132fcb46 JB |
1137 | static int |
1138 | afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) | |
1139 | { | |
1140 | struct usb_composite_dev *cdev = fn->config->cdev; | |
1141 | struct audio_dev *agdev = func_to_agdev(fn); | |
1142 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
1143 | struct usb_gadget *gadget = cdev->gadget; | |
a8147dab | 1144 | struct device *dev = &uac2->pdev.dev; |
132fcb46 JB |
1145 | struct usb_request *req; |
1146 | struct usb_ep *ep; | |
1147 | struct uac2_rtd_params *prm; | |
9bb87f16 | 1148 | int req_len, i; |
132fcb46 JB |
1149 | |
1150 | /* No i/f has more than 2 alt settings */ | |
1151 | if (alt > 1) { | |
a8147dab | 1152 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
132fcb46 JB |
1153 | return -EINVAL; |
1154 | } | |
1155 | ||
4ce63571 | 1156 | if (intf == agdev->ac_intf) { |
132fcb46 JB |
1157 | /* Control I/f has only 1 AltSetting - 0 */ |
1158 | if (alt) { | |
a8147dab | 1159 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
132fcb46 JB |
1160 | return -EINVAL; |
1161 | } | |
1162 | return 0; | |
1163 | } | |
1164 | ||
4ce63571 | 1165 | if (intf == agdev->as_out_intf) { |
132fcb46 JB |
1166 | ep = agdev->out_ep; |
1167 | prm = &uac2->c_prm; | |
1168 | config_ep_by_speed(gadget, fn, ep); | |
4ce63571 | 1169 | agdev->as_out_alt = alt; |
9bb87f16 | 1170 | req_len = prm->max_psize; |
4ce63571 | 1171 | } else if (intf == agdev->as_in_intf) { |
9bb87f16 DM |
1172 | struct f_uac2_opts *opts = agdev_to_uac2_opts(agdev); |
1173 | unsigned int factor, rate; | |
1174 | struct usb_endpoint_descriptor *ep_desc; | |
1175 | ||
132fcb46 JB |
1176 | ep = agdev->in_ep; |
1177 | prm = &uac2->p_prm; | |
1178 | config_ep_by_speed(gadget, fn, ep); | |
4ce63571 | 1179 | agdev->as_in_alt = alt; |
9bb87f16 DM |
1180 | |
1181 | /* pre-calculate the playback endpoint's interval */ | |
1182 | if (gadget->speed == USB_SPEED_FULL) { | |
1183 | ep_desc = &fs_epin_desc; | |
1184 | factor = 1000; | |
1185 | } else { | |
1186 | ep_desc = &hs_epin_desc; | |
c41b7767 | 1187 | factor = 8000; |
9bb87f16 DM |
1188 | } |
1189 | ||
1190 | /* pre-compute some values for iso_complete() */ | |
1191 | uac2->p_framesize = opts->p_ssize * | |
1192 | num_channels(opts->p_chmask); | |
1193 | rate = opts->p_srate * uac2->p_framesize; | |
c41b7767 | 1194 | uac2->p_interval = factor / (1 << (ep_desc->bInterval - 1)); |
9bb87f16 DM |
1195 | uac2->p_pktsize = min_t(unsigned int, rate / uac2->p_interval, |
1196 | prm->max_psize); | |
1197 | ||
1198 | if (uac2->p_pktsize < prm->max_psize) | |
1199 | uac2->p_pktsize_residue = rate % uac2->p_interval; | |
1200 | else | |
1201 | uac2->p_pktsize_residue = 0; | |
1202 | ||
1203 | req_len = uac2->p_pktsize; | |
1204 | uac2->p_residue = 0; | |
132fcb46 | 1205 | } else { |
a8147dab | 1206 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
132fcb46 JB |
1207 | return -EINVAL; |
1208 | } | |
1209 | ||
1210 | if (alt == 0) { | |
1211 | free_ep(prm, ep); | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | prm->ep_enabled = true; | |
1216 | usb_ep_enable(ep); | |
1217 | ||
1218 | for (i = 0; i < USB_XFERS; i++) { | |
430fdbd3 DM |
1219 | if (!prm->ureq[i].req) { |
1220 | req = usb_ep_alloc_request(ep, GFP_ATOMIC); | |
1221 | if (req == NULL) | |
1222 | return -ENOMEM; | |
1223 | ||
1224 | prm->ureq[i].req = req; | |
1225 | prm->ureq[i].pp = prm; | |
1226 | ||
1227 | req->zero = 0; | |
1228 | req->context = &prm->ureq[i]; | |
9bb87f16 | 1229 | req->length = req_len; |
430fdbd3 | 1230 | req->complete = agdev_iso_complete; |
9bb87f16 | 1231 | req->buf = prm->rbuf + i * prm->max_psize; |
132fcb46 JB |
1232 | } |
1233 | ||
430fdbd3 | 1234 | if (usb_ep_queue(ep, prm->ureq[i].req, GFP_ATOMIC)) |
a8147dab | 1235 | dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
132fcb46 JB |
1236 | } |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | static int | |
1242 | afunc_get_alt(struct usb_function *fn, unsigned intf) | |
1243 | { | |
1244 | struct audio_dev *agdev = func_to_agdev(fn); | |
1245 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
1246 | ||
4ce63571 SAS |
1247 | if (intf == agdev->ac_intf) |
1248 | return agdev->ac_alt; | |
1249 | else if (intf == agdev->as_out_intf) | |
1250 | return agdev->as_out_alt; | |
1251 | else if (intf == agdev->as_in_intf) | |
1252 | return agdev->as_in_alt; | |
132fcb46 JB |
1253 | else |
1254 | dev_err(&uac2->pdev.dev, | |
1255 | "%s:%d Invalid Interface %d!\n", | |
1256 | __func__, __LINE__, intf); | |
1257 | ||
1258 | return -EINVAL; | |
1259 | } | |
1260 | ||
1261 | static void | |
1262 | afunc_disable(struct usb_function *fn) | |
1263 | { | |
1264 | struct audio_dev *agdev = func_to_agdev(fn); | |
1265 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
1266 | ||
1267 | free_ep(&uac2->p_prm, agdev->in_ep); | |
4ce63571 | 1268 | agdev->as_in_alt = 0; |
132fcb46 JB |
1269 | |
1270 | free_ep(&uac2->c_prm, agdev->out_ep); | |
4ce63571 | 1271 | agdev->as_out_alt = 0; |
132fcb46 JB |
1272 | } |
1273 | ||
1274 | static int | |
1275 | in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) | |
1276 | { | |
1277 | struct usb_request *req = fn->config->cdev->req; | |
1278 | struct audio_dev *agdev = func_to_agdev(fn); | |
1279 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
f8f93d24 | 1280 | struct f_uac2_opts *opts; |
132fcb46 JB |
1281 | u16 w_length = le16_to_cpu(cr->wLength); |
1282 | u16 w_index = le16_to_cpu(cr->wIndex); | |
1283 | u16 w_value = le16_to_cpu(cr->wValue); | |
1284 | u8 entity_id = (w_index >> 8) & 0xff; | |
1285 | u8 control_selector = w_value >> 8; | |
1286 | int value = -EOPNOTSUPP; | |
f8f93d24 AP |
1287 | int p_srate, c_srate; |
1288 | ||
254b3bf6 | 1289 | opts = agdev_to_uac2_opts(agdev); |
f8f93d24 AP |
1290 | p_srate = opts->p_srate; |
1291 | c_srate = opts->c_srate; | |
132fcb46 JB |
1292 | |
1293 | if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { | |
1294 | struct cntrl_cur_lay3 c; | |
1295 | ||
1296 | if (entity_id == USB_IN_CLK_ID) | |
1297 | c.dCUR = p_srate; | |
1298 | else if (entity_id == USB_OUT_CLK_ID) | |
1299 | c.dCUR = c_srate; | |
1300 | ||
1301 | value = min_t(unsigned, w_length, sizeof c); | |
1302 | memcpy(req->buf, &c, value); | |
1303 | } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) { | |
1304 | *(u8 *)req->buf = 1; | |
1305 | value = min_t(unsigned, w_length, 1); | |
1306 | } else { | |
1307 | dev_err(&uac2->pdev.dev, | |
1308 | "%s:%d control_selector=%d TODO!\n", | |
1309 | __func__, __LINE__, control_selector); | |
1310 | } | |
1311 | ||
1312 | return value; | |
1313 | } | |
1314 | ||
1315 | static int | |
1316 | in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) | |
1317 | { | |
1318 | struct usb_request *req = fn->config->cdev->req; | |
1319 | struct audio_dev *agdev = func_to_agdev(fn); | |
1320 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
f8f93d24 | 1321 | struct f_uac2_opts *opts; |
132fcb46 JB |
1322 | u16 w_length = le16_to_cpu(cr->wLength); |
1323 | u16 w_index = le16_to_cpu(cr->wIndex); | |
1324 | u16 w_value = le16_to_cpu(cr->wValue); | |
1325 | u8 entity_id = (w_index >> 8) & 0xff; | |
1326 | u8 control_selector = w_value >> 8; | |
1327 | struct cntrl_range_lay3 r; | |
1328 | int value = -EOPNOTSUPP; | |
f8f93d24 AP |
1329 | int p_srate, c_srate; |
1330 | ||
254b3bf6 | 1331 | opts = agdev_to_uac2_opts(agdev); |
f8f93d24 AP |
1332 | p_srate = opts->p_srate; |
1333 | c_srate = opts->c_srate; | |
132fcb46 JB |
1334 | |
1335 | if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { | |
1336 | if (entity_id == USB_IN_CLK_ID) | |
1337 | r.dMIN = p_srate; | |
1338 | else if (entity_id == USB_OUT_CLK_ID) | |
1339 | r.dMIN = c_srate; | |
1340 | else | |
1341 | return -EOPNOTSUPP; | |
1342 | ||
1343 | r.dMAX = r.dMIN; | |
1344 | r.dRES = 0; | |
1345 | r.wNumSubRanges = 1; | |
1346 | ||
1347 | value = min_t(unsigned, w_length, sizeof r); | |
1348 | memcpy(req->buf, &r, value); | |
1349 | } else { | |
1350 | dev_err(&uac2->pdev.dev, | |
1351 | "%s:%d control_selector=%d TODO!\n", | |
1352 | __func__, __LINE__, control_selector); | |
1353 | } | |
1354 | ||
1355 | return value; | |
1356 | } | |
1357 | ||
1358 | static int | |
1359 | ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr) | |
1360 | { | |
1361 | if (cr->bRequest == UAC2_CS_CUR) | |
1362 | return in_rq_cur(fn, cr); | |
1363 | else if (cr->bRequest == UAC2_CS_RANGE) | |
1364 | return in_rq_range(fn, cr); | |
1365 | else | |
1366 | return -EOPNOTSUPP; | |
1367 | } | |
1368 | ||
1369 | static int | |
1370 | out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) | |
1371 | { | |
1372 | u16 w_length = le16_to_cpu(cr->wLength); | |
1373 | u16 w_value = le16_to_cpu(cr->wValue); | |
1374 | u8 control_selector = w_value >> 8; | |
1375 | ||
1376 | if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) | |
1377 | return w_length; | |
1378 | ||
1379 | return -EOPNOTSUPP; | |
1380 | } | |
1381 | ||
1382 | static int | |
1383 | setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr) | |
1384 | { | |
1385 | struct audio_dev *agdev = func_to_agdev(fn); | |
1386 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
1387 | u16 w_index = le16_to_cpu(cr->wIndex); | |
1388 | u8 intf = w_index & 0xff; | |
1389 | ||
4ce63571 | 1390 | if (intf != agdev->ac_intf) { |
132fcb46 JB |
1391 | dev_err(&uac2->pdev.dev, |
1392 | "%s:%d Error!\n", __func__, __LINE__); | |
1393 | return -EOPNOTSUPP; | |
1394 | } | |
1395 | ||
1396 | if (cr->bRequestType & USB_DIR_IN) | |
1397 | return ac_rq_in(fn, cr); | |
1398 | else if (cr->bRequest == UAC2_CS_CUR) | |
1399 | return out_rq_cur(fn, cr); | |
1400 | ||
1401 | return -EOPNOTSUPP; | |
1402 | } | |
1403 | ||
1404 | static int | |
1405 | afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) | |
1406 | { | |
1407 | struct usb_composite_dev *cdev = fn->config->cdev; | |
1408 | struct audio_dev *agdev = func_to_agdev(fn); | |
1409 | struct snd_uac2_chip *uac2 = &agdev->uac2; | |
1410 | struct usb_request *req = cdev->req; | |
1411 | u16 w_length = le16_to_cpu(cr->wLength); | |
1412 | int value = -EOPNOTSUPP; | |
1413 | ||
1414 | /* Only Class specific requests are supposed to reach here */ | |
1415 | if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) | |
1416 | return -EOPNOTSUPP; | |
1417 | ||
1418 | if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE) | |
1419 | value = setup_rq_inf(fn, cr); | |
1420 | else | |
1421 | dev_err(&uac2->pdev.dev, "%s:%d Error!\n", __func__, __LINE__); | |
1422 | ||
1423 | if (value >= 0) { | |
1424 | req->length = value; | |
1425 | req->zero = value < w_length; | |
1426 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | |
1427 | if (value < 0) { | |
1428 | dev_err(&uac2->pdev.dev, | |
1429 | "%s:%d Error!\n", __func__, __LINE__); | |
1430 | req->status = 0; | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | return value; | |
1435 | } | |
1436 | ||
3aeea3c5 AP |
1437 | static inline struct f_uac2_opts *to_f_uac2_opts(struct config_item *item) |
1438 | { | |
1439 | return container_of(to_config_group(item), struct f_uac2_opts, | |
1440 | func_inst.group); | |
1441 | } | |
1442 | ||
3aeea3c5 AP |
1443 | static void f_uac2_attr_release(struct config_item *item) |
1444 | { | |
1445 | struct f_uac2_opts *opts = to_f_uac2_opts(item); | |
1446 | ||
1447 | usb_put_function_instance(&opts->func_inst); | |
1448 | } | |
1449 | ||
1450 | static struct configfs_item_operations f_uac2_item_ops = { | |
1451 | .release = f_uac2_attr_release, | |
3aeea3c5 AP |
1452 | }; |
1453 | ||
1454 | #define UAC2_ATTRIBUTE(name) \ | |
495702bc | 1455 | static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ |
3aeea3c5 AP |
1456 | char *page) \ |
1457 | { \ | |
495702bc | 1458 | struct f_uac2_opts *opts = to_f_uac2_opts(item); \ |
3aeea3c5 AP |
1459 | int result; \ |
1460 | \ | |
1461 | mutex_lock(&opts->lock); \ | |
1462 | result = sprintf(page, "%u\n", opts->name); \ | |
1463 | mutex_unlock(&opts->lock); \ | |
1464 | \ | |
1465 | return result; \ | |
1466 | } \ | |
1467 | \ | |
495702bc | 1468 | static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ |
3aeea3c5 AP |
1469 | const char *page, size_t len) \ |
1470 | { \ | |
495702bc | 1471 | struct f_uac2_opts *opts = to_f_uac2_opts(item); \ |
3aeea3c5 AP |
1472 | int ret; \ |
1473 | u32 num; \ | |
1474 | \ | |
1475 | mutex_lock(&opts->lock); \ | |
1476 | if (opts->refcnt) { \ | |
1477 | ret = -EBUSY; \ | |
1478 | goto end; \ | |
1479 | } \ | |
1480 | \ | |
1481 | ret = kstrtou32(page, 0, &num); \ | |
1482 | if (ret) \ | |
1483 | goto end; \ | |
1484 | \ | |
1485 | opts->name = num; \ | |
1486 | ret = len; \ | |
1487 | \ | |
1488 | end: \ | |
1489 | mutex_unlock(&opts->lock); \ | |
1490 | return ret; \ | |
1491 | } \ | |
1492 | \ | |
495702bc | 1493 | CONFIGFS_ATTR(f_uac2_opts_, name) |
3aeea3c5 AP |
1494 | |
1495 | UAC2_ATTRIBUTE(p_chmask); | |
1496 | UAC2_ATTRIBUTE(p_srate); | |
1497 | UAC2_ATTRIBUTE(p_ssize); | |
1498 | UAC2_ATTRIBUTE(c_chmask); | |
1499 | UAC2_ATTRIBUTE(c_srate); | |
1500 | UAC2_ATTRIBUTE(c_ssize); | |
1501 | ||
1502 | static struct configfs_attribute *f_uac2_attrs[] = { | |
495702bc CH |
1503 | &f_uac2_opts_attr_p_chmask, |
1504 | &f_uac2_opts_attr_p_srate, | |
1505 | &f_uac2_opts_attr_p_ssize, | |
1506 | &f_uac2_opts_attr_c_chmask, | |
1507 | &f_uac2_opts_attr_c_srate, | |
1508 | &f_uac2_opts_attr_c_ssize, | |
3aeea3c5 AP |
1509 | NULL, |
1510 | }; | |
1511 | ||
1512 | static struct config_item_type f_uac2_func_type = { | |
1513 | .ct_item_ops = &f_uac2_item_ops, | |
1514 | .ct_attrs = f_uac2_attrs, | |
1515 | .ct_owner = THIS_MODULE, | |
1516 | }; | |
1517 | ||
f8f93d24 AP |
1518 | static void afunc_free_inst(struct usb_function_instance *f) |
1519 | { | |
1520 | struct f_uac2_opts *opts; | |
1521 | ||
1522 | opts = container_of(f, struct f_uac2_opts, func_inst); | |
1523 | kfree(opts); | |
1524 | } | |
1525 | ||
1526 | static struct usb_function_instance *afunc_alloc_inst(void) | |
1527 | { | |
1528 | struct f_uac2_opts *opts; | |
1529 | ||
1530 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
1531 | if (!opts) | |
1532 | return ERR_PTR(-ENOMEM); | |
1533 | ||
3aeea3c5 | 1534 | mutex_init(&opts->lock); |
f8f93d24 AP |
1535 | opts->func_inst.free_func_inst = afunc_free_inst; |
1536 | ||
3aeea3c5 AP |
1537 | config_group_init_type_name(&opts->func_inst.group, "", |
1538 | &f_uac2_func_type); | |
1539 | ||
1540 | opts->p_chmask = UAC2_DEF_PCHMASK; | |
1541 | opts->p_srate = UAC2_DEF_PSRATE; | |
1542 | opts->p_ssize = UAC2_DEF_PSSIZE; | |
1543 | opts->c_chmask = UAC2_DEF_CCHMASK; | |
1544 | opts->c_srate = UAC2_DEF_CSRATE; | |
1545 | opts->c_ssize = UAC2_DEF_CSSIZE; | |
f8f93d24 AP |
1546 | return &opts->func_inst; |
1547 | } | |
1548 | ||
1549 | static void afunc_free(struct usb_function *f) | |
1550 | { | |
1551 | struct audio_dev *agdev; | |
3aeea3c5 | 1552 | struct f_uac2_opts *opts; |
f8f93d24 AP |
1553 | |
1554 | agdev = func_to_agdev(f); | |
3aeea3c5 | 1555 | opts = container_of(f->fi, struct f_uac2_opts, func_inst); |
f8f93d24 | 1556 | kfree(agdev); |
3aeea3c5 AP |
1557 | mutex_lock(&opts->lock); |
1558 | --opts->refcnt; | |
1559 | mutex_unlock(&opts->lock); | |
f8f93d24 AP |
1560 | } |
1561 | ||
1562 | static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) | |
1563 | { | |
1564 | struct audio_dev *agdev = func_to_agdev(f); | |
1565 | struct uac2_rtd_params *prm; | |
1566 | ||
1567 | alsa_uac2_exit(agdev); | |
1568 | ||
1569 | prm = &agdev->uac2.p_prm; | |
1570 | kfree(prm->rbuf); | |
1571 | ||
1572 | prm = &agdev->uac2.c_prm; | |
1573 | kfree(prm->rbuf); | |
1574 | usb_free_all_descriptors(f); | |
f8f93d24 AP |
1575 | } |
1576 | ||
ef16e7c8 | 1577 | static struct usb_function *afunc_alloc(struct usb_function_instance *fi) |
f8f93d24 AP |
1578 | { |
1579 | struct audio_dev *agdev; | |
1580 | struct f_uac2_opts *opts; | |
1581 | ||
1582 | agdev = kzalloc(sizeof(*agdev), GFP_KERNEL); | |
1583 | if (agdev == NULL) | |
1584 | return ERR_PTR(-ENOMEM); | |
1585 | ||
1586 | opts = container_of(fi, struct f_uac2_opts, func_inst); | |
3aeea3c5 AP |
1587 | mutex_lock(&opts->lock); |
1588 | ++opts->refcnt; | |
1589 | mutex_unlock(&opts->lock); | |
f8f93d24 AP |
1590 | |
1591 | agdev->func.name = "uac2_func"; | |
f8f93d24 AP |
1592 | agdev->func.bind = afunc_bind; |
1593 | agdev->func.unbind = afunc_unbind; | |
1594 | agdev->func.set_alt = afunc_set_alt; | |
1595 | agdev->func.get_alt = afunc_get_alt; | |
1596 | agdev->func.disable = afunc_disable; | |
1597 | agdev->func.setup = afunc_setup; | |
1598 | agdev->func.free_func = afunc_free; | |
1599 | ||
1600 | return &agdev->func; | |
1601 | } | |
1602 | ||
1603 | DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc); | |
1604 | MODULE_LICENSE("GPL"); | |
1605 | MODULE_AUTHOR("Yadwinder Singh"); | |
1606 | MODULE_AUTHOR("Jaswinder Singh"); |