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17#include <linux/usb/audio.h>
18#include <linux/module.h>
19
20#include "u_audio.h"
21#include "u_uac1.h"
22
23
24#define UAC1_CHANNEL_MASK 0x0FFF
25
26#define USB_OUT_FU_ID (out_feature_unit_desc->bUnitID)
27#define USB_IN_FU_ID (in_feature_unit_desc->bUnitID)
28
29#define EPIN_EN(_opts) ((_opts)->p_chmask != 0)
30#define EPOUT_EN(_opts) ((_opts)->c_chmask != 0)
31#define FUIN_EN(_opts) ((_opts)->p_mute_present \
32 || (_opts)->p_volume_present)
33#define FUOUT_EN(_opts) ((_opts)->c_mute_present \
34 || (_opts)->c_volume_present)
35
36struct f_uac1 {
37 struct g_audio g_audio;
38 u8 ac_intf, as_in_intf, as_out_intf;
39 u8 ac_alt, as_in_alt, as_out_alt;
40
41 struct usb_ctrlrequest setup_cr;
42
43
44 struct usb_ep *int_ep;
45 atomic_t int_count;
46 int ctl_id;
47 int c_srate;
48 int p_srate;
49};
50
51static inline struct f_uac1 *func_to_uac1(struct usb_function *f)
52{
53 return container_of(f, struct f_uac1, g_audio.func);
54}
55
56static inline struct f_uac1_opts *g_audio_to_uac1_opts(struct g_audio *audio)
57{
58 return container_of(audio->func.fi, struct f_uac1_opts, func_inst);
59}
60
61
62
63
64
65
66
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69
70
71
72
73
74
75static struct usb_interface_descriptor ac_interface_desc = {
76 .bLength = USB_DT_INTERFACE_SIZE,
77 .bDescriptorType = USB_DT_INTERFACE,
78
79 .bInterfaceClass = USB_CLASS_AUDIO,
80 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
81};
82
83
84static struct uac1_ac_header_descriptor *ac_header_desc;
85
86static struct uac_input_terminal_descriptor usb_out_it_desc = {
87 .bLength = UAC_DT_INPUT_TERMINAL_SIZE,
88 .bDescriptorType = USB_DT_CS_INTERFACE,
89 .bDescriptorSubtype = UAC_INPUT_TERMINAL,
90
91 .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
92 .bAssocTerminal = 0,
93 .wChannelConfig = cpu_to_le16(0x3),
94};
95
96static struct uac1_output_terminal_descriptor io_out_ot_desc = {
97 .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
98 .bDescriptorType = USB_DT_CS_INTERFACE,
99 .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
100
101 .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER),
102 .bAssocTerminal = 0,
103
104};
105
106static struct uac_input_terminal_descriptor io_in_it_desc = {
107 .bLength = UAC_DT_INPUT_TERMINAL_SIZE,
108 .bDescriptorType = USB_DT_CS_INTERFACE,
109 .bDescriptorSubtype = UAC_INPUT_TERMINAL,
110
111 .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE),
112 .bAssocTerminal = 0,
113 .wChannelConfig = cpu_to_le16(0x3),
114};
115
116static struct uac1_output_terminal_descriptor usb_in_ot_desc = {
117 .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
118 .bDescriptorType = USB_DT_CS_INTERFACE,
119 .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
120
121 .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
122 .bAssocTerminal = 0,
123
124};
125
126static struct uac_feature_unit_descriptor *in_feature_unit_desc;
127static struct uac_feature_unit_descriptor *out_feature_unit_desc;
128
129
130static struct usb_endpoint_descriptor ac_int_ep_desc = {
131 .bLength = USB_DT_ENDPOINT_SIZE,
132 .bDescriptorType = USB_DT_ENDPOINT,
133 .bEndpointAddress = USB_DIR_IN,
134 .bmAttributes = USB_ENDPOINT_XFER_INT,
135 .wMaxPacketSize = cpu_to_le16(2),
136 .bInterval = 4,
137};
138
139
140static struct usb_interface_descriptor as_out_interface_alt_0_desc = {
141 .bLength = USB_DT_INTERFACE_SIZE,
142 .bDescriptorType = USB_DT_INTERFACE,
143 .bAlternateSetting = 0,
144 .bNumEndpoints = 0,
145 .bInterfaceClass = USB_CLASS_AUDIO,
146 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
147};
148
149static struct usb_interface_descriptor as_out_interface_alt_1_desc = {
150 .bLength = USB_DT_INTERFACE_SIZE,
151 .bDescriptorType = USB_DT_INTERFACE,
152 .bAlternateSetting = 1,
153 .bNumEndpoints = 1,
154 .bInterfaceClass = USB_CLASS_AUDIO,
155 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
156};
157
158static struct usb_interface_descriptor as_in_interface_alt_0_desc = {
159 .bLength = USB_DT_INTERFACE_SIZE,
160 .bDescriptorType = USB_DT_INTERFACE,
161 .bAlternateSetting = 0,
162 .bNumEndpoints = 0,
163 .bInterfaceClass = USB_CLASS_AUDIO,
164 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
165};
166
167static struct usb_interface_descriptor as_in_interface_alt_1_desc = {
168 .bLength = USB_DT_INTERFACE_SIZE,
169 .bDescriptorType = USB_DT_INTERFACE,
170 .bAlternateSetting = 1,
171 .bNumEndpoints = 1,
172 .bInterfaceClass = USB_CLASS_AUDIO,
173 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
174};
175
176
177static struct uac1_as_header_descriptor as_out_header_desc = {
178 .bLength = UAC_DT_AS_HEADER_SIZE,
179 .bDescriptorType = USB_DT_CS_INTERFACE,
180 .bDescriptorSubtype = UAC_AS_GENERAL,
181
182 .bDelay = 1,
183 .wFormatTag = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM),
184};
185
186static struct uac1_as_header_descriptor as_in_header_desc = {
187 .bLength = UAC_DT_AS_HEADER_SIZE,
188 .bDescriptorType = USB_DT_CS_INTERFACE,
189 .bDescriptorSubtype = UAC_AS_GENERAL,
190
191 .bDelay = 1,
192 .wFormatTag = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM),
193};
194
195DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(UAC_MAX_RATES);
196#define uac_format_type_i_discrete_descriptor \
197 uac_format_type_i_discrete_descriptor_##UAC_MAX_RATES
198
199static struct uac_format_type_i_discrete_descriptor as_out_type_i_desc = {
200 .bLength = 0,
201 .bDescriptorType = USB_DT_CS_INTERFACE,
202 .bDescriptorSubtype = UAC_FORMAT_TYPE,
203 .bFormatType = UAC_FORMAT_TYPE_I,
204 .bSubframeSize = 2,
205 .bBitResolution = 16,
206 .bSamFreqType = 0,
207};
208
209
210static struct usb_endpoint_descriptor as_out_ep_desc = {
211 .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
212 .bDescriptorType = USB_DT_ENDPOINT,
213 .bEndpointAddress = USB_DIR_OUT,
214 .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE
215 | USB_ENDPOINT_XFER_ISOC,
216 .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
217 .bInterval = 4,
218};
219
220
221static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
222 .bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
223 .bDescriptorType = USB_DT_CS_ENDPOINT,
224 .bDescriptorSubtype = UAC_EP_GENERAL,
225 .bmAttributes = 1,
226 .bLockDelayUnits = 1,
227 .wLockDelay = cpu_to_le16(1),
228};
229
230static struct uac_format_type_i_discrete_descriptor as_in_type_i_desc = {
231 .bLength = 0,
232 .bDescriptorType = USB_DT_CS_INTERFACE,
233 .bDescriptorSubtype = UAC_FORMAT_TYPE,
234 .bFormatType = UAC_FORMAT_TYPE_I,
235 .bSubframeSize = 2,
236 .bBitResolution = 16,
237 .bSamFreqType = 0,
238};
239
240
241static struct usb_endpoint_descriptor as_in_ep_desc = {
242 .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
243 .bDescriptorType = USB_DT_ENDPOINT,
244 .bEndpointAddress = USB_DIR_IN,
245 .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
246 | USB_ENDPOINT_XFER_ISOC,
247 .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
248 .bInterval = 4,
249};
250
251
252static struct uac_iso_endpoint_descriptor as_iso_in_desc = {
253 .bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
254 .bDescriptorType = USB_DT_CS_ENDPOINT,
255 .bDescriptorSubtype = UAC_EP_GENERAL,
256 .bmAttributes = 1,
257 .bLockDelayUnits = 0,
258 .wLockDelay = 0,
259};
260
261static struct usb_descriptor_header *f_audio_desc[] = {
262 (struct usb_descriptor_header *)&ac_interface_desc,
263 (struct usb_descriptor_header *)&ac_header_desc,
264
265 (struct usb_descriptor_header *)&usb_out_it_desc,
266 (struct usb_descriptor_header *)&io_out_ot_desc,
267 (struct usb_descriptor_header *)&out_feature_unit_desc,
268
269 (struct usb_descriptor_header *)&io_in_it_desc,
270 (struct usb_descriptor_header *)&usb_in_ot_desc,
271 (struct usb_descriptor_header *)&in_feature_unit_desc,
272
273 (struct usb_descriptor_header *)&ac_int_ep_desc,
274
275 (struct usb_descriptor_header *)&as_out_interface_alt_0_desc,
276 (struct usb_descriptor_header *)&as_out_interface_alt_1_desc,
277 (struct usb_descriptor_header *)&as_out_header_desc,
278
279 (struct usb_descriptor_header *)&as_out_type_i_desc,
280
281 (struct usb_descriptor_header *)&as_out_ep_desc,
282 (struct usb_descriptor_header *)&as_iso_out_desc,
283
284 (struct usb_descriptor_header *)&as_in_interface_alt_0_desc,
285 (struct usb_descriptor_header *)&as_in_interface_alt_1_desc,
286 (struct usb_descriptor_header *)&as_in_header_desc,
287
288 (struct usb_descriptor_header *)&as_in_type_i_desc,
289
290 (struct usb_descriptor_header *)&as_in_ep_desc,
291 (struct usb_descriptor_header *)&as_iso_in_desc,
292 NULL,
293};
294
295enum {
296 STR_AC_IF,
297 STR_USB_OUT_IT,
298 STR_USB_OUT_IT_CH_NAMES,
299 STR_IO_OUT_OT,
300 STR_IO_IN_IT,
301 STR_IO_IN_IT_CH_NAMES,
302 STR_USB_IN_OT,
303 STR_FU_IN,
304 STR_FU_OUT,
305 STR_AS_OUT_IF_ALT0,
306 STR_AS_OUT_IF_ALT1,
307 STR_AS_IN_IF_ALT0,
308 STR_AS_IN_IF_ALT1,
309};
310
311static struct usb_string strings_uac1[] = {
312
313 [STR_USB_OUT_IT].s = "Playback Input terminal",
314 [STR_USB_OUT_IT_CH_NAMES].s = "Playback Channels",
315 [STR_IO_OUT_OT].s = "Playback Output terminal",
316 [STR_IO_IN_IT].s = "Capture Input terminal",
317 [STR_IO_IN_IT_CH_NAMES].s = "Capture Channels",
318 [STR_USB_IN_OT].s = "Capture Output terminal",
319 [STR_FU_IN].s = "Capture Volume",
320 [STR_FU_OUT].s = "Playback Volume",
321 [STR_AS_OUT_IF_ALT0].s = "Playback Inactive",
322 [STR_AS_OUT_IF_ALT1].s = "Playback Active",
323 [STR_AS_IN_IF_ALT0].s = "Capture Inactive",
324 [STR_AS_IN_IF_ALT1].s = "Capture Active",
325 { },
326};
327
328static struct usb_gadget_strings str_uac1 = {
329 .language = 0x0409,
330 .strings = strings_uac1,
331};
332
333static struct usb_gadget_strings *uac1_strings[] = {
334 &str_uac1,
335 NULL,
336};
337
338
339
340
341
342static void uac_cs_attr_sample_rate(struct usb_ep *ep, struct usb_request *req)
343{
344 struct usb_function *fn = ep->driver_data;
345 struct usb_composite_dev *cdev = fn->config->cdev;
346 struct g_audio *agdev = func_to_g_audio(fn);
347 struct f_uac1 *uac1 = func_to_uac1(fn);
348 u8 *buf = (u8 *)req->buf;
349 u32 val = 0;
350
351 if (req->actual != 3) {
352 WARN(cdev, "Invalid data size for UAC_EP_CS_ATTR_SAMPLE_RATE.\n");
353 return;
354 }
355
356 val = buf[0] | (buf[1] << 8) | (buf[2] << 16);
357 if (uac1->ctl_id == (USB_DIR_IN | 2)) {
358 uac1->p_srate = val;
359 u_audio_set_playback_srate(agdev, uac1->p_srate);
360 } else if (uac1->ctl_id == (USB_DIR_OUT | 1)) {
361 uac1->c_srate = val;
362 u_audio_set_capture_srate(agdev, uac1->c_srate);
363 }
364}
365
366static void audio_notify_complete(struct usb_ep *_ep, struct usb_request *req)
367{
368 struct g_audio *audio = req->context;
369 struct f_uac1 *uac1 = func_to_uac1(&audio->func);
370
371 atomic_dec(&uac1->int_count);
372 kfree(req->buf);
373 usb_ep_free_request(_ep, req);
374}
375
376static int audio_notify(struct g_audio *audio, int unit_id, int cs)
377{
378 struct f_uac1 *uac1 = func_to_uac1(&audio->func);
379 struct usb_request *req;
380 struct uac1_status_word *msg;
381 int ret;
382
383 if (!uac1->int_ep->enabled)
384 return 0;
385
386 if (atomic_inc_return(&uac1->int_count) > UAC1_DEF_INT_REQ_NUM) {
387 atomic_dec(&uac1->int_count);
388 return 0;
389 }
390
391 req = usb_ep_alloc_request(uac1->int_ep, GFP_ATOMIC);
392 if (req == NULL) {
393 ret = -ENOMEM;
394 goto err_dec_int_count;
395 }
396
397 msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
398 if (msg == NULL) {
399 ret = -ENOMEM;
400 goto err_free_request;
401 }
402
403 msg->bStatusType = UAC1_STATUS_TYPE_IRQ_PENDING
404 | UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF;
405 msg->bOriginator = unit_id;
406
407 req->length = sizeof(*msg);
408 req->buf = msg;
409 req->context = audio;
410 req->complete = audio_notify_complete;
411
412 ret = usb_ep_queue(uac1->int_ep, req, GFP_ATOMIC);
413
414 if (ret)
415 goto err_free_msg;
416
417 return 0;
418
419err_free_msg:
420 kfree(msg);
421err_free_request:
422 usb_ep_free_request(uac1->int_ep, req);
423err_dec_int_count:
424 atomic_dec(&uac1->int_count);
425
426 return ret;
427}
428
429static int
430in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
431{
432 struct usb_request *req = fn->config->cdev->req;
433 struct g_audio *audio = func_to_g_audio(fn);
434 struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
435 u16 w_length = le16_to_cpu(cr->wLength);
436 u16 w_index = le16_to_cpu(cr->wIndex);
437 u16 w_value = le16_to_cpu(cr->wValue);
438 u8 entity_id = (w_index >> 8) & 0xff;
439 u8 control_selector = w_value >> 8;
440 int value = -EOPNOTSUPP;
441
442 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
443 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
444 unsigned int is_playback = 0;
445
446 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
447 is_playback = 1;
448
449 if (control_selector == UAC_FU_MUTE) {
450 unsigned int mute;
451
452 u_audio_get_mute(audio, is_playback, &mute);
453
454 *(u8 *)req->buf = mute;
455 value = min_t(unsigned int, w_length, 1);
456 } else if (control_selector == UAC_FU_VOLUME) {
457 __le16 c;
458 s16 volume;
459
460 u_audio_get_volume(audio, is_playback, &volume);
461
462 c = cpu_to_le16(volume);
463
464 value = min_t(unsigned int, w_length, sizeof(c));
465 memcpy(req->buf, &c, value);
466 } else {
467 dev_err(&audio->gadget->dev,
468 "%s:%d control_selector=%d TODO!\n",
469 __func__, __LINE__, control_selector);
470 }
471 } else {
472 dev_err(&audio->gadget->dev,
473 "%s:%d entity_id=%d control_selector=%d TODO!\n",
474 __func__, __LINE__, entity_id, control_selector);
475 }
476
477 return value;
478}
479
480static int
481in_rq_min(struct usb_function *fn, const struct usb_ctrlrequest *cr)
482{
483 struct usb_request *req = fn->config->cdev->req;
484 struct g_audio *audio = func_to_g_audio(fn);
485 struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
486 u16 w_length = le16_to_cpu(cr->wLength);
487 u16 w_index = le16_to_cpu(cr->wIndex);
488 u16 w_value = le16_to_cpu(cr->wValue);
489 u8 entity_id = (w_index >> 8) & 0xff;
490 u8 control_selector = w_value >> 8;
491 int value = -EOPNOTSUPP;
492
493 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
494 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
495 unsigned int is_playback = 0;
496
497 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
498 is_playback = 1;
499
500 if (control_selector == UAC_FU_VOLUME) {
501 __le16 r;
502 s16 min_db;
503
504 if (is_playback)
505 min_db = opts->p_volume_min;
506 else
507 min_db = opts->c_volume_min;
508
509 r = cpu_to_le16(min_db);
510
511 value = min_t(unsigned int, w_length, sizeof(r));
512 memcpy(req->buf, &r, value);
513 } else {
514 dev_err(&audio->gadget->dev,
515 "%s:%d control_selector=%d TODO!\n",
516 __func__, __LINE__, control_selector);
517 }
518 } else {
519 dev_err(&audio->gadget->dev,
520 "%s:%d entity_id=%d control_selector=%d TODO!\n",
521 __func__, __LINE__, entity_id, control_selector);
522 }
523
524 return value;
525}
526
527static int
528in_rq_max(struct usb_function *fn, const struct usb_ctrlrequest *cr)
529{
530 struct usb_request *req = fn->config->cdev->req;
531 struct g_audio *audio = func_to_g_audio(fn);
532 struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
533 u16 w_length = le16_to_cpu(cr->wLength);
534 u16 w_index = le16_to_cpu(cr->wIndex);
535 u16 w_value = le16_to_cpu(cr->wValue);
536 u8 entity_id = (w_index >> 8) & 0xff;
537 u8 control_selector = w_value >> 8;
538 int value = -EOPNOTSUPP;
539
540 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
541 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
542 unsigned int is_playback = 0;
543
544 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
545 is_playback = 1;
546
547 if (control_selector == UAC_FU_VOLUME) {
548 __le16 r;
549 s16 max_db;
550
551 if (is_playback)
552 max_db = opts->p_volume_max;
553 else
554 max_db = opts->c_volume_max;
555
556 r = cpu_to_le16(max_db);
557
558 value = min_t(unsigned int, w_length, sizeof(r));
559 memcpy(req->buf, &r, value);
560 } else {
561 dev_err(&audio->gadget->dev,
562 "%s:%d control_selector=%d TODO!\n",
563 __func__, __LINE__, control_selector);
564 }
565 } else {
566 dev_err(&audio->gadget->dev,
567 "%s:%d entity_id=%d control_selector=%d TODO!\n",
568 __func__, __LINE__, entity_id, control_selector);
569 }
570
571 return value;
572}
573
574static int
575in_rq_res(struct usb_function *fn, const struct usb_ctrlrequest *cr)
576{
577 struct usb_request *req = fn->config->cdev->req;
578 struct g_audio *audio = func_to_g_audio(fn);
579 struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
580 u16 w_length = le16_to_cpu(cr->wLength);
581 u16 w_index = le16_to_cpu(cr->wIndex);
582 u16 w_value = le16_to_cpu(cr->wValue);
583 u8 entity_id = (w_index >> 8) & 0xff;
584 u8 control_selector = w_value >> 8;
585 int value = -EOPNOTSUPP;
586
587 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
588 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
589 unsigned int is_playback = 0;
590
591 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
592 is_playback = 1;
593
594 if (control_selector == UAC_FU_VOLUME) {
595 __le16 r;
596 s16 res_db;
597
598 if (is_playback)
599 res_db = opts->p_volume_res;
600 else
601 res_db = opts->c_volume_res;
602
603 r = cpu_to_le16(res_db);
604
605 value = min_t(unsigned int, w_length, sizeof(r));
606 memcpy(req->buf, &r, value);
607 } else {
608 dev_err(&audio->gadget->dev,
609 "%s:%d control_selector=%d TODO!\n",
610 __func__, __LINE__, control_selector);
611 }
612 } else {
613 dev_err(&audio->gadget->dev,
614 "%s:%d entity_id=%d control_selector=%d TODO!\n",
615 __func__, __LINE__, entity_id, control_selector);
616 }
617
618 return value;
619}
620
621static void
622out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req)
623{
624 struct g_audio *audio = req->context;
625 struct usb_composite_dev *cdev = audio->func.config->cdev;
626 struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
627 struct f_uac1 *uac1 = func_to_uac1(&audio->func);
628 struct usb_ctrlrequest *cr = &uac1->setup_cr;
629 u16 w_index = le16_to_cpu(cr->wIndex);
630 u16 w_value = le16_to_cpu(cr->wValue);
631 u8 entity_id = (w_index >> 8) & 0xff;
632 u8 control_selector = w_value >> 8;
633
634 if (req->status != 0) {
635 dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status);
636 return;
637 }
638
639 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
640 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
641 unsigned int is_playback = 0;
642
643 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
644 is_playback = 1;
645
646 if (control_selector == UAC_FU_MUTE) {
647 u8 mute = *(u8 *)req->buf;
648
649 u_audio_set_mute(audio, is_playback, mute);
650
651 return;
652 } else if (control_selector == UAC_FU_VOLUME) {
653 __le16 *c = req->buf;
654 s16 volume;
655
656 volume = le16_to_cpu(*c);
657 u_audio_set_volume(audio, is_playback, volume);
658
659 return;
660 } else {
661 dev_err(&audio->gadget->dev,
662 "%s:%d control_selector=%d TODO!\n",
663 __func__, __LINE__, control_selector);
664 usb_ep_set_halt(ep);
665 }
666 } else {
667 dev_err(&audio->gadget->dev,
668 "%s:%d entity_id=%d control_selector=%d TODO!\n",
669 __func__, __LINE__, entity_id, control_selector);
670 usb_ep_set_halt(ep);
671
672 }
673}
674
675static int
676out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
677{
678 struct usb_request *req = fn->config->cdev->req;
679 struct g_audio *audio = func_to_g_audio(fn);
680 struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
681 struct f_uac1 *uac1 = func_to_uac1(&audio->func);
682 u16 w_length = le16_to_cpu(cr->wLength);
683 u16 w_index = le16_to_cpu(cr->wIndex);
684 u16 w_value = le16_to_cpu(cr->wValue);
685 u8 entity_id = (w_index >> 8) & 0xff;
686 u8 control_selector = w_value >> 8;
687
688 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
689 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
690 memcpy(&uac1->setup_cr, cr, sizeof(*cr));
691 req->context = audio;
692 req->complete = out_rq_cur_complete;
693
694 return w_length;
695 } else {
696 dev_err(&audio->gadget->dev,
697 "%s:%d entity_id=%d control_selector=%d TODO!\n",
698 __func__, __LINE__, entity_id, control_selector);
699 }
700 return -EOPNOTSUPP;
701}
702
703static int ac_rq_in(struct usb_function *f,
704 const struct usb_ctrlrequest *ctrl)
705{
706 struct usb_composite_dev *cdev = f->config->cdev;
707 int value = -EOPNOTSUPP;
708 u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
709 u16 len = le16_to_cpu(ctrl->wLength);
710 u16 w_value = le16_to_cpu(ctrl->wValue);
711
712 DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
713 ctrl->bRequest, w_value, len, ep);
714
715 switch (ctrl->bRequest) {
716 case UAC_GET_CUR:
717 return in_rq_cur(f, ctrl);
718 case UAC_GET_MIN:
719 return in_rq_min(f, ctrl);
720 case UAC_GET_MAX:
721 return in_rq_max(f, ctrl);
722 case UAC_GET_RES:
723 return in_rq_res(f, ctrl);
724 case UAC_GET_MEM:
725 break;
726 case UAC_GET_STAT:
727 value = len;
728 break;
729 default:
730 break;
731 }
732
733 return value;
734}
735
736static int audio_set_endpoint_req(struct usb_function *f,
737 const struct usb_ctrlrequest *ctrl)
738{
739 struct usb_composite_dev *cdev = f->config->cdev;
740 struct usb_request *req = f->config->cdev->req;
741 struct f_uac1 *uac1 = func_to_uac1(f);
742 int value = -EOPNOTSUPP;
743 u16 ep = le16_to_cpu(ctrl->wIndex);
744 u16 len = le16_to_cpu(ctrl->wLength);
745 u16 w_value = le16_to_cpu(ctrl->wValue);
746 u8 cs = w_value >> 8;
747
748 DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
749 ctrl->bRequest, w_value, len, ep);
750
751 switch (ctrl->bRequest) {
752 case UAC_SET_CUR: {
753 if (cs == UAC_EP_CS_ATTR_SAMPLE_RATE) {
754 cdev->gadget->ep0->driver_data = f;
755 uac1->ctl_id = ep;
756 req->complete = uac_cs_attr_sample_rate;
757 }
758 value = len;
759 break;
760 }
761
762 case UAC_SET_MIN:
763 break;
764
765 case UAC_SET_MAX:
766 break;
767
768 case UAC_SET_RES:
769 break;
770
771 case UAC_SET_MEM:
772 break;
773
774 default:
775 break;
776 }
777
778 return value;
779}
780
781static int audio_get_endpoint_req(struct usb_function *f,
782 const struct usb_ctrlrequest *ctrl)
783{
784 struct usb_composite_dev *cdev = f->config->cdev;
785 struct usb_request *req = f->config->cdev->req;
786 struct f_uac1 *uac1 = func_to_uac1(f);
787 u8 *buf = (u8 *)req->buf;
788 int value = -EOPNOTSUPP;
789 u8 ep = le16_to_cpu(ctrl->wIndex);
790 u16 len = le16_to_cpu(ctrl->wLength);
791 u16 w_value = le16_to_cpu(ctrl->wValue);
792 u8 cs = w_value >> 8;
793 u32 val = 0;
794
795 DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
796 ctrl->bRequest, w_value, len, ep);
797
798 switch (ctrl->bRequest) {
799 case UAC_GET_CUR: {
800 if (cs == UAC_EP_CS_ATTR_SAMPLE_RATE) {
801 if (ep == (USB_DIR_IN | 2))
802 val = uac1->p_srate;
803 else if (ep == (USB_DIR_OUT | 1))
804 val = uac1->c_srate;
805 buf[2] = (val >> 16) & 0xff;
806 buf[1] = (val >> 8) & 0xff;
807 buf[0] = val & 0xff;
808 }
809 value = len;
810 break;
811 }
812 case UAC_GET_MIN:
813 case UAC_GET_MAX:
814 case UAC_GET_RES:
815 value = len;
816 break;
817 case UAC_GET_MEM:
818 break;
819 default:
820 break;
821 }
822
823 return value;
824}
825
826static int
827f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
828{
829 struct usb_composite_dev *cdev = f->config->cdev;
830 struct usb_request *req = cdev->req;
831 int value = -EOPNOTSUPP;
832 u16 w_index = le16_to_cpu(ctrl->wIndex);
833 u16 w_value = le16_to_cpu(ctrl->wValue);
834 u16 w_length = le16_to_cpu(ctrl->wLength);
835
836
837
838
839 switch (ctrl->bRequestType) {
840 case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
841 value = audio_set_endpoint_req(f, ctrl);
842 break;
843
844 case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
845 value = audio_get_endpoint_req(f, ctrl);
846 break;
847 case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
848 if (ctrl->bRequest == UAC_SET_CUR)
849 value = out_rq_cur(f, ctrl);
850 break;
851 case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
852 value = ac_rq_in(f, ctrl);
853 break;
854 default:
855 ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
856 ctrl->bRequestType, ctrl->bRequest,
857 w_value, w_index, w_length);
858 }
859
860
861 if (value >= 0) {
862 DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n",
863 ctrl->bRequestType, ctrl->bRequest,
864 w_value, w_index, w_length);
865 req->zero = 0;
866 req->length = value;
867 value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
868 if (value < 0)
869 ERROR(cdev, "audio response on err %d\n", value);
870 }
871
872
873 return value;
874}
875
876static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
877{
878 struct usb_composite_dev *cdev = f->config->cdev;
879 struct usb_gadget *gadget = cdev->gadget;
880 struct device *dev = &gadget->dev;
881 struct g_audio *audio = func_to_g_audio(f);
882 struct f_uac1 *uac1 = func_to_uac1(f);
883 int ret = 0;
884
885
886 if (alt > 1) {
887 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
888 return -EINVAL;
889 }
890
891 if (intf == uac1->ac_intf) {
892
893 if (alt) {
894 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
895 return -EINVAL;
896 }
897
898
899 if (uac1->int_ep) {
900 usb_ep_disable(uac1->int_ep);
901 config_ep_by_speed(gadget, &audio->func, uac1->int_ep);
902 usb_ep_enable(uac1->int_ep);
903 }
904
905 return 0;
906 }
907
908 if (intf == uac1->as_out_intf) {
909 uac1->as_out_alt = alt;
910
911 if (alt)
912 ret = u_audio_start_capture(&uac1->g_audio);
913 else
914 u_audio_stop_capture(&uac1->g_audio);
915 } else if (intf == uac1->as_in_intf) {
916 uac1->as_in_alt = alt;
917
918 if (alt)
919 ret = u_audio_start_playback(&uac1->g_audio);
920 else
921 u_audio_stop_playback(&uac1->g_audio);
922 } else {
923 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
924 return -EINVAL;
925 }
926
927 return ret;
928}
929
930static int f_audio_get_alt(struct usb_function *f, unsigned intf)
931{
932 struct usb_composite_dev *cdev = f->config->cdev;
933 struct usb_gadget *gadget = cdev->gadget;
934 struct device *dev = &gadget->dev;
935 struct f_uac1 *uac1 = func_to_uac1(f);
936
937 if (intf == uac1->ac_intf)
938 return uac1->ac_alt;
939 else if (intf == uac1->as_out_intf)
940 return uac1->as_out_alt;
941 else if (intf == uac1->as_in_intf)
942 return uac1->as_in_alt;
943 else
944 dev_err(dev, "%s:%d Invalid Interface %d!\n",
945 __func__, __LINE__, intf);
946
947 return -EINVAL;
948}
949
950
951static void f_audio_disable(struct usb_function *f)
952{
953 struct f_uac1 *uac1 = func_to_uac1(f);
954
955 uac1->as_out_alt = 0;
956 uac1->as_in_alt = 0;
957
958 u_audio_stop_playback(&uac1->g_audio);
959 u_audio_stop_capture(&uac1->g_audio);
960 if (uac1->int_ep)
961 usb_ep_disable(uac1->int_ep);
962}
963
964static void
965f_audio_suspend(struct usb_function *f)
966{
967 struct f_uac1 *uac1 = func_to_uac1(f);
968
969 u_audio_suspend(&uac1->g_audio);
970}
971
972
973static struct uac_feature_unit_descriptor *build_fu_desc(int chmask)
974{
975 struct uac_feature_unit_descriptor *fu_desc;
976 int channels = num_channels(chmask);
977 int fu_desc_size = UAC_DT_FEATURE_UNIT_SIZE(channels);
978
979 fu_desc = kzalloc(fu_desc_size, GFP_KERNEL);
980 if (!fu_desc)
981 return NULL;
982
983 fu_desc->bLength = fu_desc_size;
984 fu_desc->bDescriptorType = USB_DT_CS_INTERFACE;
985
986 fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT;
987 fu_desc->bControlSize = 2;
988
989
990
991 return fu_desc;
992}
993
994
995static struct
996uac1_ac_header_descriptor *build_ac_header_desc(struct f_uac1_opts *opts)
997{
998 struct uac1_ac_header_descriptor *ac_desc;
999 int ac_header_desc_size;
1000 int num_ifaces = 0;
1001
1002 if (EPOUT_EN(opts))
1003 num_ifaces++;
1004 if (EPIN_EN(opts))
1005 num_ifaces++;
1006
1007 ac_header_desc_size = UAC_DT_AC_HEADER_SIZE(num_ifaces);
1008
1009 ac_desc = kzalloc(ac_header_desc_size, GFP_KERNEL);
1010 if (!ac_desc)
1011 return NULL;
1012
1013 ac_desc->bLength = ac_header_desc_size;
1014 ac_desc->bDescriptorType = USB_DT_CS_INTERFACE;
1015 ac_desc->bDescriptorSubtype = UAC_HEADER;
1016 ac_desc->bcdADC = cpu_to_le16(0x0100);
1017 ac_desc->bInCollection = num_ifaces;
1018
1019
1020
1021 return ac_desc;
1022}
1023
1024
1025#define USBDHDR(p) (struct usb_descriptor_header *)(p)
1026
1027static void setup_descriptor(struct f_uac1_opts *opts)
1028{
1029
1030 int i = 1;
1031
1032 if (EPOUT_EN(opts))
1033 usb_out_it_desc.bTerminalID = i++;
1034 if (EPIN_EN(opts))
1035 io_in_it_desc.bTerminalID = i++;
1036 if (EPOUT_EN(opts))
1037 io_out_ot_desc.bTerminalID = i++;
1038 if (EPIN_EN(opts))
1039 usb_in_ot_desc.bTerminalID = i++;
1040 if (FUOUT_EN(opts))
1041 out_feature_unit_desc->bUnitID = i++;
1042 if (FUIN_EN(opts))
1043 in_feature_unit_desc->bUnitID = i++;
1044
1045 if (FUIN_EN(opts)) {
1046 usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID;
1047 in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID;
1048 } else {
1049 usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
1050 }
1051 if (FUOUT_EN(opts)) {
1052 io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID;
1053 out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID;
1054 } else {
1055 io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
1056 }
1057
1058 as_out_header_desc.bTerminalLink = usb_out_it_desc.bTerminalID;
1059 as_in_header_desc.bTerminalLink = usb_in_ot_desc.bTerminalID;
1060
1061 ac_header_desc->wTotalLength = cpu_to_le16(ac_header_desc->bLength);
1062
1063 if (EPIN_EN(opts)) {
1064 u16 len = le16_to_cpu(ac_header_desc->wTotalLength);
1065
1066 len += sizeof(usb_in_ot_desc);
1067 len += sizeof(io_in_it_desc);
1068 if (FUIN_EN(opts))
1069 len += in_feature_unit_desc->bLength;
1070 ac_header_desc->wTotalLength = cpu_to_le16(len);
1071 }
1072 if (EPOUT_EN(opts)) {
1073 u16 len = le16_to_cpu(ac_header_desc->wTotalLength);
1074
1075 len += sizeof(usb_out_it_desc);
1076 len += sizeof(io_out_ot_desc);
1077 if (FUOUT_EN(opts))
1078 len += out_feature_unit_desc->bLength;
1079 ac_header_desc->wTotalLength = cpu_to_le16(len);
1080 }
1081
1082 i = 0;
1083 f_audio_desc[i++] = USBDHDR(&ac_interface_desc);
1084 f_audio_desc[i++] = USBDHDR(ac_header_desc);
1085
1086 if (EPOUT_EN(opts)) {
1087 f_audio_desc[i++] = USBDHDR(&usb_out_it_desc);
1088 f_audio_desc[i++] = USBDHDR(&io_out_ot_desc);
1089 if (FUOUT_EN(opts))
1090 f_audio_desc[i++] = USBDHDR(out_feature_unit_desc);
1091 }
1092
1093 if (EPIN_EN(opts)) {
1094 f_audio_desc[i++] = USBDHDR(&io_in_it_desc);
1095 f_audio_desc[i++] = USBDHDR(&usb_in_ot_desc);
1096 if (FUIN_EN(opts))
1097 f_audio_desc[i++] = USBDHDR(in_feature_unit_desc);
1098 }
1099
1100 if (FUOUT_EN(opts) || FUIN_EN(opts))
1101 f_audio_desc[i++] = USBDHDR(&ac_int_ep_desc);
1102
1103 if (EPOUT_EN(opts)) {
1104 f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_0_desc);
1105 f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_1_desc);
1106 f_audio_desc[i++] = USBDHDR(&as_out_header_desc);
1107 f_audio_desc[i++] = USBDHDR(&as_out_type_i_desc);
1108 f_audio_desc[i++] = USBDHDR(&as_out_ep_desc);
1109 f_audio_desc[i++] = USBDHDR(&as_iso_out_desc);
1110 }
1111 if (EPIN_EN(opts)) {
1112 f_audio_desc[i++] = USBDHDR(&as_in_interface_alt_0_desc);
1113 f_audio_desc[i++] = USBDHDR(&as_in_interface_alt_1_desc);
1114 f_audio_desc[i++] = USBDHDR(&as_in_header_desc);
1115 f_audio_desc[i++] = USBDHDR(&as_in_type_i_desc);
1116 f_audio_desc[i++] = USBDHDR(&as_in_ep_desc);
1117 f_audio_desc[i++] = USBDHDR(&as_iso_in_desc);
1118 }
1119 f_audio_desc[i] = NULL;
1120}
1121
1122static int f_audio_validate_opts(struct g_audio *audio, struct device *dev)
1123{
1124 struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio);
1125
1126 if (!opts->p_chmask && !opts->c_chmask) {
1127 dev_err(dev, "Error: no playback and capture channels\n");
1128 return -EINVAL;
1129 } else if (opts->p_chmask & ~UAC1_CHANNEL_MASK) {
1130 dev_err(dev, "Error: unsupported playback channels mask\n");
1131 return -EINVAL;
1132 } else if (opts->c_chmask & ~UAC1_CHANNEL_MASK) {
1133 dev_err(dev, "Error: unsupported capture channels mask\n");
1134 return -EINVAL;
1135 } else if ((opts->p_ssize < 1) || (opts->p_ssize > 4)) {
1136 dev_err(dev, "Error: incorrect playback sample size\n");
1137 return -EINVAL;
1138 } else if ((opts->c_ssize < 1) || (opts->c_ssize > 4)) {
1139 dev_err(dev, "Error: incorrect capture sample size\n");
1140 return -EINVAL;
1141 } else if (!opts->p_srates[0]) {
1142 dev_err(dev, "Error: incorrect playback sampling rate\n");
1143 return -EINVAL;
1144 } else if (!opts->c_srates[0]) {
1145 dev_err(dev, "Error: incorrect capture sampling rate\n");
1146 return -EINVAL;
1147 }
1148
1149 if (opts->p_volume_max <= opts->p_volume_min) {
1150 dev_err(dev, "Error: incorrect playback volume max/min\n");
1151 return -EINVAL;
1152 } else if (opts->c_volume_max <= opts->c_volume_min) {
1153 dev_err(dev, "Error: incorrect capture volume max/min\n");
1154 return -EINVAL;
1155 } else if (opts->p_volume_res <= 0) {
1156 dev_err(dev, "Error: negative/zero playback volume resolution\n");
1157 return -EINVAL;
1158 } else if (opts->c_volume_res <= 0) {
1159 dev_err(dev, "Error: negative/zero capture volume resolution\n");
1160 return -EINVAL;
1161 }
1162
1163 if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) {
1164 dev_err(dev, "Error: incorrect playback volume resolution\n");
1165 return -EINVAL;
1166 } else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) {
1167 dev_err(dev, "Error: incorrect capture volume resolution\n");
1168 return -EINVAL;
1169 }
1170
1171 return 0;
1172}
1173
1174
1175static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
1176{
1177 struct usb_composite_dev *cdev = c->cdev;
1178 struct usb_gadget *gadget = cdev->gadget;
1179 struct device *dev = &gadget->dev;
1180 struct f_uac1 *uac1 = func_to_uac1(f);
1181 struct g_audio *audio = func_to_g_audio(f);
1182 struct f_uac1_opts *audio_opts;
1183 struct usb_ep *ep = NULL;
1184 struct usb_string *us;
1185 int ba_iface_id;
1186 int status;
1187 int idx, i;
1188
1189 status = f_audio_validate_opts(audio, dev);
1190 if (status)
1191 return status;
1192
1193 audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst);
1194
1195 strings_uac1[STR_AC_IF].s = audio_opts->function_name;
1196
1197 us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1));
1198 if (IS_ERR(us))
1199 return PTR_ERR(us);
1200
1201 ac_header_desc = build_ac_header_desc(audio_opts);
1202 if (!ac_header_desc)
1203 return -ENOMEM;
1204
1205 if (FUOUT_EN(audio_opts)) {
1206 out_feature_unit_desc = build_fu_desc(audio_opts->c_chmask);
1207 if (!out_feature_unit_desc) {
1208 status = -ENOMEM;
1209 goto fail;
1210 }
1211 }
1212 if (FUIN_EN(audio_opts)) {
1213 in_feature_unit_desc = build_fu_desc(audio_opts->p_chmask);
1214 if (!in_feature_unit_desc) {
1215 status = -ENOMEM;
1216 goto err_free_fu;
1217 }
1218 }
1219
1220 ac_interface_desc.iInterface = us[STR_AC_IF].id;
1221 usb_out_it_desc.iTerminal = us[STR_USB_OUT_IT].id;
1222 usb_out_it_desc.iChannelNames = us[STR_USB_OUT_IT_CH_NAMES].id;
1223 io_out_ot_desc.iTerminal = us[STR_IO_OUT_OT].id;
1224 as_out_interface_alt_0_desc.iInterface = us[STR_AS_OUT_IF_ALT0].id;
1225 as_out_interface_alt_1_desc.iInterface = us[STR_AS_OUT_IF_ALT1].id;
1226 io_in_it_desc.iTerminal = us[STR_IO_IN_IT].id;
1227 io_in_it_desc.iChannelNames = us[STR_IO_IN_IT_CH_NAMES].id;
1228 usb_in_ot_desc.iTerminal = us[STR_USB_IN_OT].id;
1229 as_in_interface_alt_0_desc.iInterface = us[STR_AS_IN_IF_ALT0].id;
1230 as_in_interface_alt_1_desc.iInterface = us[STR_AS_IN_IF_ALT1].id;
1231
1232 if (FUOUT_EN(audio_opts)) {
1233 u8 *i_feature;
1234
1235 i_feature = (u8 *)out_feature_unit_desc +
1236 out_feature_unit_desc->bLength - 1;
1237 *i_feature = us[STR_FU_OUT].id;
1238 }
1239 if (FUIN_EN(audio_opts)) {
1240 u8 *i_feature;
1241
1242 i_feature = (u8 *)in_feature_unit_desc +
1243 in_feature_unit_desc->bLength - 1;
1244 *i_feature = us[STR_FU_IN].id;
1245 }
1246
1247
1248 usb_out_it_desc.bNrChannels = num_channels(audio_opts->c_chmask);
1249 usb_out_it_desc.wChannelConfig = cpu_to_le16(audio_opts->c_chmask);
1250 as_out_type_i_desc.bNrChannels = num_channels(audio_opts->c_chmask);
1251 as_out_type_i_desc.bSubframeSize = audio_opts->c_ssize;
1252 as_out_type_i_desc.bBitResolution = audio_opts->c_ssize * 8;
1253 io_in_it_desc.bNrChannels = num_channels(audio_opts->p_chmask);
1254 io_in_it_desc.wChannelConfig = cpu_to_le16(audio_opts->p_chmask);
1255 as_in_type_i_desc.bNrChannels = num_channels(audio_opts->p_chmask);
1256 as_in_type_i_desc.bSubframeSize = audio_opts->p_ssize;
1257 as_in_type_i_desc.bBitResolution = audio_opts->p_ssize * 8;
1258
1259 if (FUOUT_EN(audio_opts)) {
1260 __le16 *bma = (__le16 *)&out_feature_unit_desc->bmaControls[0];
1261 u32 control = 0;
1262
1263 if (audio_opts->c_mute_present)
1264 control |= UAC_FU_MUTE;
1265 if (audio_opts->c_volume_present)
1266 control |= UAC_FU_VOLUME;
1267 *bma = cpu_to_le16(control);
1268 }
1269 if (FUIN_EN(audio_opts)) {
1270 __le16 *bma = (__le16 *)&in_feature_unit_desc->bmaControls[0];
1271 u32 control = 0;
1272
1273 if (audio_opts->p_mute_present)
1274 control |= UAC_FU_MUTE;
1275 if (audio_opts->p_volume_present)
1276 control |= UAC_FU_VOLUME;
1277 *bma = cpu_to_le16(control);
1278 }
1279
1280
1281 for (i = 0, idx = 0; i < UAC_MAX_RATES; i++) {
1282 if (audio_opts->c_srates[i] == 0)
1283 break;
1284 memcpy(as_out_type_i_desc.tSamFreq[idx++],
1285 &audio_opts->c_srates[i], 3);
1286 }
1287 as_out_type_i_desc.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(idx);
1288 as_out_type_i_desc.bSamFreqType = idx;
1289
1290 for (i = 0, idx = 0; i < UAC_MAX_RATES; i++) {
1291 if (audio_opts->p_srates[i] == 0)
1292 break;
1293 memcpy(as_in_type_i_desc.tSamFreq[idx++],
1294 &audio_opts->p_srates[i], 3);
1295 }
1296 as_in_type_i_desc.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(idx);
1297 as_in_type_i_desc.bSamFreqType = idx;
1298 uac1->p_srate = audio_opts->p_srates[0];
1299 uac1->c_srate = audio_opts->c_srates[0];
1300
1301
1302 status = usb_interface_id(c, f);
1303 if (status < 0)
1304 goto err_free_fu;
1305 ac_interface_desc.bInterfaceNumber = status;
1306 uac1->ac_intf = status;
1307 uac1->ac_alt = 0;
1308
1309 ba_iface_id = 0;
1310
1311 if (EPOUT_EN(audio_opts)) {
1312 status = usb_interface_id(c, f);
1313 if (status < 0)
1314 goto err_free_fu;
1315 as_out_interface_alt_0_desc.bInterfaceNumber = status;
1316 as_out_interface_alt_1_desc.bInterfaceNumber = status;
1317 ac_header_desc->baInterfaceNr[ba_iface_id++] = status;
1318 uac1->as_out_intf = status;
1319 uac1->as_out_alt = 0;
1320 }
1321
1322 if (EPIN_EN(audio_opts)) {
1323 status = usb_interface_id(c, f);
1324 if (status < 0)
1325 goto err_free_fu;
1326 as_in_interface_alt_0_desc.bInterfaceNumber = status;
1327 as_in_interface_alt_1_desc.bInterfaceNumber = status;
1328 ac_header_desc->baInterfaceNr[ba_iface_id++] = status;
1329 uac1->as_in_intf = status;
1330 uac1->as_in_alt = 0;
1331 }
1332
1333 audio->gadget = gadget;
1334
1335 status = -ENODEV;
1336
1337 ac_interface_desc.bNumEndpoints = 0;
1338
1339
1340 if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts)) {
1341 ep = usb_ep_autoconfig(cdev->gadget, &ac_int_ep_desc);
1342 if (!ep)
1343 goto err_free_fu;
1344 uac1->int_ep = ep;
1345 uac1->int_ep->desc = &ac_int_ep_desc;
1346
1347 ac_interface_desc.bNumEndpoints = 1;
1348 }
1349
1350
1351 if (EPOUT_EN(audio_opts)) {
1352 ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
1353 if (!ep)
1354 goto err_free_fu;
1355 audio->out_ep = ep;
1356 audio->out_ep->desc = &as_out_ep_desc;
1357 }
1358
1359 if (EPIN_EN(audio_opts)) {
1360 ep = usb_ep_autoconfig(cdev->gadget, &as_in_ep_desc);
1361 if (!ep)
1362 goto err_free_fu;
1363 audio->in_ep = ep;
1364 audio->in_ep->desc = &as_in_ep_desc;
1365 }
1366
1367 setup_descriptor(audio_opts);
1368
1369
1370 status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL,
1371 NULL);
1372 if (status)
1373 goto err_free_fu;
1374
1375 audio->out_ep_maxpsize = le16_to_cpu(as_out_ep_desc.wMaxPacketSize);
1376 audio->in_ep_maxpsize = le16_to_cpu(as_in_ep_desc.wMaxPacketSize);
1377 audio->params.c_chmask = audio_opts->c_chmask;
1378 memcpy(audio->params.c_srates, audio_opts->c_srates,
1379 sizeof(audio->params.c_srates));
1380 audio->params.c_ssize = audio_opts->c_ssize;
1381 if (FUIN_EN(audio_opts)) {
1382 audio->params.p_fu.id = USB_IN_FU_ID;
1383 audio->params.p_fu.mute_present = audio_opts->p_mute_present;
1384 audio->params.p_fu.volume_present =
1385 audio_opts->p_volume_present;
1386 audio->params.p_fu.volume_min = audio_opts->p_volume_min;
1387 audio->params.p_fu.volume_max = audio_opts->p_volume_max;
1388 audio->params.p_fu.volume_res = audio_opts->p_volume_res;
1389 }
1390 audio->params.p_chmask = audio_opts->p_chmask;
1391 memcpy(audio->params.p_srates, audio_opts->p_srates,
1392 sizeof(audio->params.p_srates));
1393 audio->params.p_ssize = audio_opts->p_ssize;
1394 if (FUOUT_EN(audio_opts)) {
1395 audio->params.c_fu.id = USB_OUT_FU_ID;
1396 audio->params.c_fu.mute_present = audio_opts->c_mute_present;
1397 audio->params.c_fu.volume_present =
1398 audio_opts->c_volume_present;
1399 audio->params.c_fu.volume_min = audio_opts->c_volume_min;
1400 audio->params.c_fu.volume_max = audio_opts->c_volume_max;
1401 audio->params.c_fu.volume_res = audio_opts->c_volume_res;
1402 }
1403 audio->params.req_number = audio_opts->req_number;
1404 audio->params.fb_max = FBACK_FAST_MAX;
1405 if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts))
1406 audio->notify = audio_notify;
1407
1408 status = g_audio_setup(audio, "UAC1_PCM", "UAC1_Gadget");
1409 if (status)
1410 goto err_card_register;
1411
1412 return 0;
1413
1414err_card_register:
1415 usb_free_all_descriptors(f);
1416err_free_fu:
1417 kfree(out_feature_unit_desc);
1418 out_feature_unit_desc = NULL;
1419 kfree(in_feature_unit_desc);
1420 in_feature_unit_desc = NULL;
1421fail:
1422 kfree(ac_header_desc);
1423 ac_header_desc = NULL;
1424 return status;
1425}
1426
1427
1428
1429static inline struct f_uac1_opts *to_f_uac1_opts(struct config_item *item)
1430{
1431 return container_of(to_config_group(item), struct f_uac1_opts,
1432 func_inst.group);
1433}
1434
1435static void f_uac1_attr_release(struct config_item *item)
1436{
1437 struct f_uac1_opts *opts = to_f_uac1_opts(item);
1438
1439 usb_put_function_instance(&opts->func_inst);
1440}
1441
1442static struct configfs_item_operations f_uac1_item_ops = {
1443 .release = f_uac1_attr_release,
1444};
1445
1446#define uac1_kstrtou32 kstrtou32
1447#define uac1_kstrtos16 kstrtos16
1448#define uac1_kstrtobool(s, base, res) kstrtobool((s), (res))
1449
1450static const char *u32_fmt = "%u\n";
1451static const char *s16_fmt = "%hd\n";
1452static const char *bool_fmt = "%u\n";
1453
1454#define UAC1_ATTRIBUTE(type, name) \
1455static ssize_t f_uac1_opts_##name##_show( \
1456 struct config_item *item, \
1457 char *page) \
1458{ \
1459 struct f_uac1_opts *opts = to_f_uac1_opts(item); \
1460 int result; \
1461 \
1462 mutex_lock(&opts->lock); \
1463 result = sprintf(page, type##_fmt, opts->name); \
1464 mutex_unlock(&opts->lock); \
1465 \
1466 return result; \
1467} \
1468 \
1469static ssize_t f_uac1_opts_##name##_store( \
1470 struct config_item *item, \
1471 const char *page, size_t len) \
1472{ \
1473 struct f_uac1_opts *opts = to_f_uac1_opts(item); \
1474 int ret; \
1475 type num; \
1476 \
1477 mutex_lock(&opts->lock); \
1478 if (opts->refcnt) { \
1479 ret = -EBUSY; \
1480 goto end; \
1481 } \
1482 \
1483 ret = uac1_kstrto##type(page, 0, &num); \
1484 if (ret) \
1485 goto end; \
1486 \
1487 opts->name = num; \
1488 ret = len; \
1489 \
1490end: \
1491 mutex_unlock(&opts->lock); \
1492 return ret; \
1493} \
1494 \
1495CONFIGFS_ATTR(f_uac1_opts_, name)
1496
1497#define UAC1_RATE_ATTRIBUTE(name) \
1498static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \
1499 char *page) \
1500{ \
1501 struct f_uac1_opts *opts = to_f_uac1_opts(item); \
1502 int result = 0; \
1503 int i; \
1504 \
1505 mutex_lock(&opts->lock); \
1506 page[0] = '\0'; \
1507 for (i = 0; i < UAC_MAX_RATES; i++) { \
1508 if (opts->name##s[i] == 0) \
1509 break; \
1510 result += sprintf(page + strlen(page), "%u,", \
1511 opts->name##s[i]); \
1512 } \
1513 if (strlen(page) > 0) \
1514 page[strlen(page) - 1] = '\n'; \
1515 mutex_unlock(&opts->lock); \
1516 \
1517 return result; \
1518} \
1519 \
1520static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \
1521 const char *page, size_t len) \
1522{ \
1523 struct f_uac1_opts *opts = to_f_uac1_opts(item); \
1524 char *split_page = NULL; \
1525 int ret = -EINVAL; \
1526 char *token; \
1527 u32 num; \
1528 int i; \
1529 \
1530 mutex_lock(&opts->lock); \
1531 if (opts->refcnt) { \
1532 ret = -EBUSY; \
1533 goto end; \
1534 } \
1535 \
1536 i = 0; \
1537 memset(opts->name##s, 0x00, sizeof(opts->name##s)); \
1538 split_page = kstrdup(page, GFP_KERNEL); \
1539 while ((token = strsep(&split_page, ",")) != NULL) { \
1540 ret = kstrtou32(token, 0, &num); \
1541 if (ret) \
1542 goto end; \
1543 \
1544 opts->name##s[i++] = num; \
1545 ret = len; \
1546 }; \
1547 \
1548end: \
1549 kfree(split_page); \
1550 mutex_unlock(&opts->lock); \
1551 return ret; \
1552} \
1553 \
1554CONFIGFS_ATTR(f_uac1_opts_, name)
1555
1556#define UAC1_ATTRIBUTE_STRING(name) \
1557static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \
1558 char *page) \
1559{ \
1560 struct f_uac1_opts *opts = to_f_uac1_opts(item); \
1561 int result; \
1562 \
1563 mutex_lock(&opts->lock); \
1564 result = snprintf(page, sizeof(opts->name), "%s", opts->name); \
1565 mutex_unlock(&opts->lock); \
1566 \
1567 return result; \
1568} \
1569 \
1570static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \
1571 const char *page, size_t len) \
1572{ \
1573 struct f_uac1_opts *opts = to_f_uac1_opts(item); \
1574 int ret = 0; \
1575 \
1576 mutex_lock(&opts->lock); \
1577 if (opts->refcnt) { \
1578 ret = -EBUSY; \
1579 goto end; \
1580 } \
1581 \
1582 ret = snprintf(opts->name, min(sizeof(opts->name), len), \
1583 "%s", page); \
1584 \
1585end: \
1586 mutex_unlock(&opts->lock); \
1587 return ret; \
1588} \
1589 \
1590CONFIGFS_ATTR(f_uac1_opts_, name)
1591
1592UAC1_ATTRIBUTE(u32, c_chmask);
1593UAC1_RATE_ATTRIBUTE(c_srate);
1594UAC1_ATTRIBUTE(u32, c_ssize);
1595UAC1_ATTRIBUTE(u32, p_chmask);
1596UAC1_RATE_ATTRIBUTE(p_srate);
1597UAC1_ATTRIBUTE(u32, p_ssize);
1598UAC1_ATTRIBUTE(u32, req_number);
1599
1600UAC1_ATTRIBUTE(bool, p_mute_present);
1601UAC1_ATTRIBUTE(bool, p_volume_present);
1602UAC1_ATTRIBUTE(s16, p_volume_min);
1603UAC1_ATTRIBUTE(s16, p_volume_max);
1604UAC1_ATTRIBUTE(s16, p_volume_res);
1605
1606UAC1_ATTRIBUTE(bool, c_mute_present);
1607UAC1_ATTRIBUTE(bool, c_volume_present);
1608UAC1_ATTRIBUTE(s16, c_volume_min);
1609UAC1_ATTRIBUTE(s16, c_volume_max);
1610UAC1_ATTRIBUTE(s16, c_volume_res);
1611UAC1_ATTRIBUTE_STRING(function_name);
1612
1613static struct configfs_attribute *f_uac1_attrs[] = {
1614 &f_uac1_opts_attr_c_chmask,
1615 &f_uac1_opts_attr_c_srate,
1616 &f_uac1_opts_attr_c_ssize,
1617 &f_uac1_opts_attr_p_chmask,
1618 &f_uac1_opts_attr_p_srate,
1619 &f_uac1_opts_attr_p_ssize,
1620 &f_uac1_opts_attr_req_number,
1621
1622 &f_uac1_opts_attr_p_mute_present,
1623 &f_uac1_opts_attr_p_volume_present,
1624 &f_uac1_opts_attr_p_volume_min,
1625 &f_uac1_opts_attr_p_volume_max,
1626 &f_uac1_opts_attr_p_volume_res,
1627
1628 &f_uac1_opts_attr_c_mute_present,
1629 &f_uac1_opts_attr_c_volume_present,
1630 &f_uac1_opts_attr_c_volume_min,
1631 &f_uac1_opts_attr_c_volume_max,
1632 &f_uac1_opts_attr_c_volume_res,
1633
1634 &f_uac1_opts_attr_function_name,
1635
1636 NULL,
1637};
1638
1639static const struct config_item_type f_uac1_func_type = {
1640 .ct_item_ops = &f_uac1_item_ops,
1641 .ct_attrs = f_uac1_attrs,
1642 .ct_owner = THIS_MODULE,
1643};
1644
1645static void f_audio_free_inst(struct usb_function_instance *f)
1646{
1647 struct f_uac1_opts *opts;
1648
1649 opts = container_of(f, struct f_uac1_opts, func_inst);
1650 kfree(opts);
1651}
1652
1653static struct usb_function_instance *f_audio_alloc_inst(void)
1654{
1655 struct f_uac1_opts *opts;
1656
1657 opts = kzalloc(sizeof(*opts), GFP_KERNEL);
1658 if (!opts)
1659 return ERR_PTR(-ENOMEM);
1660
1661 mutex_init(&opts->lock);
1662 opts->func_inst.free_func_inst = f_audio_free_inst;
1663
1664 config_group_init_type_name(&opts->func_inst.group, "",
1665 &f_uac1_func_type);
1666
1667 opts->c_chmask = UAC1_DEF_CCHMASK;
1668 opts->c_srates[0] = UAC1_DEF_CSRATE;
1669 opts->c_ssize = UAC1_DEF_CSSIZE;
1670 opts->p_chmask = UAC1_DEF_PCHMASK;
1671 opts->p_srates[0] = UAC1_DEF_PSRATE;
1672 opts->p_ssize = UAC1_DEF_PSSIZE;
1673
1674 opts->p_mute_present = UAC1_DEF_MUTE_PRESENT;
1675 opts->p_volume_present = UAC1_DEF_VOLUME_PRESENT;
1676 opts->p_volume_min = UAC1_DEF_MIN_DB;
1677 opts->p_volume_max = UAC1_DEF_MAX_DB;
1678 opts->p_volume_res = UAC1_DEF_RES_DB;
1679
1680 opts->c_mute_present = UAC1_DEF_MUTE_PRESENT;
1681 opts->c_volume_present = UAC1_DEF_VOLUME_PRESENT;
1682 opts->c_volume_min = UAC1_DEF_MIN_DB;
1683 opts->c_volume_max = UAC1_DEF_MAX_DB;
1684 opts->c_volume_res = UAC1_DEF_RES_DB;
1685
1686 opts->req_number = UAC1_DEF_REQ_NUM;
1687
1688 snprintf(opts->function_name, sizeof(opts->function_name), "AC Interface");
1689
1690 return &opts->func_inst;
1691}
1692
1693static void f_audio_free(struct usb_function *f)
1694{
1695 struct g_audio *audio;
1696 struct f_uac1_opts *opts;
1697
1698 audio = func_to_g_audio(f);
1699 opts = container_of(f->fi, struct f_uac1_opts, func_inst);
1700 kfree(audio);
1701 mutex_lock(&opts->lock);
1702 --opts->refcnt;
1703 mutex_unlock(&opts->lock);
1704}
1705
1706static void f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
1707{
1708 struct g_audio *audio = func_to_g_audio(f);
1709
1710 g_audio_cleanup(audio);
1711 usb_free_all_descriptors(f);
1712
1713 kfree(out_feature_unit_desc);
1714 out_feature_unit_desc = NULL;
1715 kfree(in_feature_unit_desc);
1716 in_feature_unit_desc = NULL;
1717
1718 kfree(ac_header_desc);
1719 ac_header_desc = NULL;
1720
1721 audio->gadget = NULL;
1722}
1723
1724static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
1725{
1726 struct f_uac1 *uac1;
1727 struct f_uac1_opts *opts;
1728
1729
1730 uac1 = kzalloc(sizeof(*uac1), GFP_KERNEL);
1731 if (!uac1)
1732 return ERR_PTR(-ENOMEM);
1733
1734 opts = container_of(fi, struct f_uac1_opts, func_inst);
1735 mutex_lock(&opts->lock);
1736 ++opts->refcnt;
1737 mutex_unlock(&opts->lock);
1738
1739 uac1->g_audio.func.name = "uac1_func";
1740 uac1->g_audio.func.bind = f_audio_bind;
1741 uac1->g_audio.func.unbind = f_audio_unbind;
1742 uac1->g_audio.func.set_alt = f_audio_set_alt;
1743 uac1->g_audio.func.get_alt = f_audio_get_alt;
1744 uac1->g_audio.func.setup = f_audio_setup;
1745 uac1->g_audio.func.disable = f_audio_disable;
1746 uac1->g_audio.func.suspend = f_audio_suspend;
1747 uac1->g_audio.func.free_func = f_audio_free;
1748
1749 return &uac1->g_audio.func;
1750}
1751
1752DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc);
1753MODULE_LICENSE("GPL");
1754MODULE_AUTHOR("Ruslan Bilovol");
1755
