diff options
Diffstat (limited to 'drivers/usb/gadget/function/f_uac1.c')
-rw-r--r-- | drivers/usb/gadget/function/f_uac1.c | 768 |
1 files changed, 768 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c new file mode 100644 index 000000000000..2b4c82d84bfc --- /dev/null +++ b/drivers/usb/gadget/function/f_uac1.c | |||
@@ -0,0 +1,768 @@ | |||
1 | /* | ||
2 | * f_audio.c -- USB Audio class function driver | ||
3 | * | ||
4 | * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org> | ||
5 | * Copyright (C) 2008 Analog Devices, Inc | ||
6 | * | ||
7 | * Enter bugs at http://blackfin.uclinux.org/ | ||
8 | * | ||
9 | * Licensed under the GPL-2 or later. | ||
10 | */ | ||
11 | |||
12 | #include <linux/slab.h> | ||
13 | #include <linux/kernel.h> | ||
14 | #include <linux/device.h> | ||
15 | #include <linux/atomic.h> | ||
16 | |||
17 | #include "u_uac1.h" | ||
18 | |||
19 | #define OUT_EP_MAX_PACKET_SIZE 200 | ||
20 | static int req_buf_size = OUT_EP_MAX_PACKET_SIZE; | ||
21 | module_param(req_buf_size, int, S_IRUGO); | ||
22 | MODULE_PARM_DESC(req_buf_size, "ISO OUT endpoint request buffer size"); | ||
23 | |||
24 | static int req_count = 256; | ||
25 | module_param(req_count, int, S_IRUGO); | ||
26 | MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count"); | ||
27 | |||
28 | static int audio_buf_size = 48000; | ||
29 | module_param(audio_buf_size, int, S_IRUGO); | ||
30 | MODULE_PARM_DESC(audio_buf_size, "Audio buffer size"); | ||
31 | |||
32 | static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value); | ||
33 | static int generic_get_cmd(struct usb_audio_control *con, u8 cmd); | ||
34 | |||
35 | /* | ||
36 | * DESCRIPTORS ... most are static, but strings and full | ||
37 | * configuration descriptors are built on demand. | ||
38 | */ | ||
39 | |||
40 | /* | ||
41 | * We have two interfaces- AudioControl and AudioStreaming | ||
42 | * TODO: only supcard playback currently | ||
43 | */ | ||
44 | #define F_AUDIO_AC_INTERFACE 0 | ||
45 | #define F_AUDIO_AS_INTERFACE 1 | ||
46 | #define F_AUDIO_NUM_INTERFACES 2 | ||
47 | |||
48 | /* B.3.1 Standard AC Interface Descriptor */ | ||
49 | static struct usb_interface_descriptor ac_interface_desc __initdata = { | ||
50 | .bLength = USB_DT_INTERFACE_SIZE, | ||
51 | .bDescriptorType = USB_DT_INTERFACE, | ||
52 | .bNumEndpoints = 0, | ||
53 | .bInterfaceClass = USB_CLASS_AUDIO, | ||
54 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, | ||
55 | }; | ||
56 | |||
57 | DECLARE_UAC_AC_HEADER_DESCRIPTOR(2); | ||
58 | |||
59 | #define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES) | ||
60 | /* 1 input terminal, 1 output terminal and 1 feature unit */ | ||
61 | #define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \ | ||
62 | + UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0)) | ||
63 | /* B.3.2 Class-Specific AC Interface Descriptor */ | ||
64 | static struct uac1_ac_header_descriptor_2 ac_header_desc = { | ||
65 | .bLength = UAC_DT_AC_HEADER_LENGTH, | ||
66 | .bDescriptorType = USB_DT_CS_INTERFACE, | ||
67 | .bDescriptorSubtype = UAC_HEADER, | ||
68 | .bcdADC = __constant_cpu_to_le16(0x0100), | ||
69 | .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH), | ||
70 | .bInCollection = F_AUDIO_NUM_INTERFACES, | ||
71 | .baInterfaceNr = { | ||
72 | [0] = F_AUDIO_AC_INTERFACE, | ||
73 | [1] = F_AUDIO_AS_INTERFACE, | ||
74 | } | ||
75 | }; | ||
76 | |||
77 | #define INPUT_TERMINAL_ID 1 | ||
78 | static struct uac_input_terminal_descriptor input_terminal_desc = { | ||
79 | .bLength = UAC_DT_INPUT_TERMINAL_SIZE, | ||
80 | .bDescriptorType = USB_DT_CS_INTERFACE, | ||
81 | .bDescriptorSubtype = UAC_INPUT_TERMINAL, | ||
82 | .bTerminalID = INPUT_TERMINAL_ID, | ||
83 | .wTerminalType = UAC_TERMINAL_STREAMING, | ||
84 | .bAssocTerminal = 0, | ||
85 | .wChannelConfig = 0x3, | ||
86 | }; | ||
87 | |||
88 | DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0); | ||
89 | |||
90 | #define FEATURE_UNIT_ID 2 | ||
91 | static struct uac_feature_unit_descriptor_0 feature_unit_desc = { | ||
92 | .bLength = UAC_DT_FEATURE_UNIT_SIZE(0), | ||
93 | .bDescriptorType = USB_DT_CS_INTERFACE, | ||
94 | .bDescriptorSubtype = UAC_FEATURE_UNIT, | ||
95 | .bUnitID = FEATURE_UNIT_ID, | ||
96 | .bSourceID = INPUT_TERMINAL_ID, | ||
97 | .bControlSize = 2, | ||
98 | .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME), | ||
99 | }; | ||
100 | |||
101 | static struct usb_audio_control mute_control = { | ||
102 | .list = LIST_HEAD_INIT(mute_control.list), | ||
103 | .name = "Mute Control", | ||
104 | .type = UAC_FU_MUTE, | ||
105 | /* Todo: add real Mute control code */ | ||
106 | .set = generic_set_cmd, | ||
107 | .get = generic_get_cmd, | ||
108 | }; | ||
109 | |||
110 | static struct usb_audio_control volume_control = { | ||
111 | .list = LIST_HEAD_INIT(volume_control.list), | ||
112 | .name = "Volume Control", | ||
113 | .type = UAC_FU_VOLUME, | ||
114 | /* Todo: add real Volume control code */ | ||
115 | .set = generic_set_cmd, | ||
116 | .get = generic_get_cmd, | ||
117 | }; | ||
118 | |||
119 | static struct usb_audio_control_selector feature_unit = { | ||
120 | .list = LIST_HEAD_INIT(feature_unit.list), | ||
121 | .id = FEATURE_UNIT_ID, | ||
122 | .name = "Mute & Volume Control", | ||
123 | .type = UAC_FEATURE_UNIT, | ||
124 | .desc = (struct usb_descriptor_header *)&feature_unit_desc, | ||
125 | }; | ||
126 | |||
127 | #define OUTPUT_TERMINAL_ID 3 | ||
128 | static struct uac1_output_terminal_descriptor output_terminal_desc = { | ||
129 | .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE, | ||
130 | .bDescriptorType = USB_DT_CS_INTERFACE, | ||
131 | .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, | ||
132 | .bTerminalID = OUTPUT_TERMINAL_ID, | ||
133 | .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER, | ||
134 | .bAssocTerminal = FEATURE_UNIT_ID, | ||
135 | .bSourceID = FEATURE_UNIT_ID, | ||
136 | }; | ||
137 | |||
138 | /* B.4.1 Standard AS Interface Descriptor */ | ||
139 | static struct usb_interface_descriptor as_interface_alt_0_desc = { | ||
140 | .bLength = USB_DT_INTERFACE_SIZE, | ||
141 | .bDescriptorType = USB_DT_INTERFACE, | ||
142 | .bAlternateSetting = 0, | ||
143 | .bNumEndpoints = 0, | ||
144 | .bInterfaceClass = USB_CLASS_AUDIO, | ||
145 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, | ||
146 | }; | ||
147 | |||
148 | static struct usb_interface_descriptor as_interface_alt_1_desc = { | ||
149 | .bLength = USB_DT_INTERFACE_SIZE, | ||
150 | .bDescriptorType = USB_DT_INTERFACE, | ||
151 | .bAlternateSetting = 1, | ||
152 | .bNumEndpoints = 1, | ||
153 | .bInterfaceClass = USB_CLASS_AUDIO, | ||
154 | .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, | ||
155 | }; | ||
156 | |||
157 | /* B.4.2 Class-Specific AS Interface Descriptor */ | ||
158 | static struct uac1_as_header_descriptor as_header_desc = { | ||
159 | .bLength = UAC_DT_AS_HEADER_SIZE, | ||
160 | .bDescriptorType = USB_DT_CS_INTERFACE, | ||
161 | .bDescriptorSubtype = UAC_AS_GENERAL, | ||
162 | .bTerminalLink = INPUT_TERMINAL_ID, | ||
163 | .bDelay = 1, | ||
164 | .wFormatTag = UAC_FORMAT_TYPE_I_PCM, | ||
165 | }; | ||
166 | |||
167 | DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1); | ||
168 | |||
169 | static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = { | ||
170 | .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1), | ||
171 | .bDescriptorType = USB_DT_CS_INTERFACE, | ||
172 | .bDescriptorSubtype = UAC_FORMAT_TYPE, | ||
173 | .bFormatType = UAC_FORMAT_TYPE_I, | ||
174 | .bSubframeSize = 2, | ||
175 | .bBitResolution = 16, | ||
176 | .bSamFreqType = 1, | ||
177 | }; | ||
178 | |||
179 | /* Standard ISO OUT Endpoint Descriptor */ | ||
180 | static struct usb_endpoint_descriptor as_out_ep_desc = { | ||
181 | .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, | ||
182 | .bDescriptorType = USB_DT_ENDPOINT, | ||
183 | .bEndpointAddress = USB_DIR_OUT, | ||
184 | .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE | ||
185 | | USB_ENDPOINT_XFER_ISOC, | ||
186 | .wMaxPacketSize = __constant_cpu_to_le16(OUT_EP_MAX_PACKET_SIZE), | ||
187 | .bInterval = 4, | ||
188 | }; | ||
189 | |||
190 | /* Class-specific AS ISO OUT Endpoint Descriptor */ | ||
191 | static struct uac_iso_endpoint_descriptor as_iso_out_desc __initdata = { | ||
192 | .bLength = UAC_ISO_ENDPOINT_DESC_SIZE, | ||
193 | .bDescriptorType = USB_DT_CS_ENDPOINT, | ||
194 | .bDescriptorSubtype = UAC_EP_GENERAL, | ||
195 | .bmAttributes = 1, | ||
196 | .bLockDelayUnits = 1, | ||
197 | .wLockDelay = __constant_cpu_to_le16(1), | ||
198 | }; | ||
199 | |||
200 | static struct usb_descriptor_header *f_audio_desc[] __initdata = { | ||
201 | (struct usb_descriptor_header *)&ac_interface_desc, | ||
202 | (struct usb_descriptor_header *)&ac_header_desc, | ||
203 | |||
204 | (struct usb_descriptor_header *)&input_terminal_desc, | ||
205 | (struct usb_descriptor_header *)&output_terminal_desc, | ||
206 | (struct usb_descriptor_header *)&feature_unit_desc, | ||
207 | |||
208 | (struct usb_descriptor_header *)&as_interface_alt_0_desc, | ||
209 | (struct usb_descriptor_header *)&as_interface_alt_1_desc, | ||
210 | (struct usb_descriptor_header *)&as_header_desc, | ||
211 | |||
212 | (struct usb_descriptor_header *)&as_type_i_desc, | ||
213 | |||
214 | (struct usb_descriptor_header *)&as_out_ep_desc, | ||
215 | (struct usb_descriptor_header *)&as_iso_out_desc, | ||
216 | NULL, | ||
217 | }; | ||
218 | |||
219 | /* | ||
220 | * This function is an ALSA sound card following USB Audio Class Spec 1.0. | ||
221 | */ | ||
222 | |||
223 | /*-------------------------------------------------------------------------*/ | ||
224 | struct f_audio_buf { | ||
225 | u8 *buf; | ||
226 | int actual; | ||
227 | struct list_head list; | ||
228 | }; | ||
229 | |||
230 | static struct f_audio_buf *f_audio_buffer_alloc(int buf_size) | ||
231 | { | ||
232 | struct f_audio_buf *copy_buf; | ||
233 | |||
234 | copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC); | ||
235 | if (!copy_buf) | ||
236 | return ERR_PTR(-ENOMEM); | ||
237 | |||
238 | copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC); | ||
239 | if (!copy_buf->buf) { | ||
240 | kfree(copy_buf); | ||
241 | return ERR_PTR(-ENOMEM); | ||
242 | } | ||
243 | |||
244 | return copy_buf; | ||
245 | } | ||
246 | |||
247 | static void f_audio_buffer_free(struct f_audio_buf *audio_buf) | ||
248 | { | ||
249 | kfree(audio_buf->buf); | ||
250 | kfree(audio_buf); | ||
251 | } | ||
252 | /*-------------------------------------------------------------------------*/ | ||
253 | |||
254 | struct f_audio { | ||
255 | struct gaudio card; | ||
256 | |||
257 | /* endpoints handle full and/or high speeds */ | ||
258 | struct usb_ep *out_ep; | ||
259 | |||
260 | spinlock_t lock; | ||
261 | struct f_audio_buf *copy_buf; | ||
262 | struct work_struct playback_work; | ||
263 | struct list_head play_queue; | ||
264 | |||
265 | /* Control Set command */ | ||
266 | struct list_head cs; | ||
267 | u8 set_cmd; | ||
268 | struct usb_audio_control *set_con; | ||
269 | }; | ||
270 | |||
271 | static inline struct f_audio *func_to_audio(struct usb_function *f) | ||
272 | { | ||
273 | return container_of(f, struct f_audio, card.func); | ||
274 | } | ||
275 | |||
276 | /*-------------------------------------------------------------------------*/ | ||
277 | |||
278 | static void f_audio_playback_work(struct work_struct *data) | ||
279 | { | ||
280 | struct f_audio *audio = container_of(data, struct f_audio, | ||
281 | playback_work); | ||
282 | struct f_audio_buf *play_buf; | ||
283 | |||
284 | spin_lock_irq(&audio->lock); | ||
285 | if (list_empty(&audio->play_queue)) { | ||
286 | spin_unlock_irq(&audio->lock); | ||
287 | return; | ||
288 | } | ||
289 | play_buf = list_first_entry(&audio->play_queue, | ||
290 | struct f_audio_buf, list); | ||
291 | list_del(&play_buf->list); | ||
292 | spin_unlock_irq(&audio->lock); | ||
293 | |||
294 | u_audio_playback(&audio->card, play_buf->buf, play_buf->actual); | ||
295 | f_audio_buffer_free(play_buf); | ||
296 | } | ||
297 | |||
298 | static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req) | ||
299 | { | ||
300 | struct f_audio *audio = req->context; | ||
301 | struct usb_composite_dev *cdev = audio->card.func.config->cdev; | ||
302 | struct f_audio_buf *copy_buf = audio->copy_buf; | ||
303 | int err; | ||
304 | |||
305 | if (!copy_buf) | ||
306 | return -EINVAL; | ||
307 | |||
308 | /* Copy buffer is full, add it to the play_queue */ | ||
309 | if (audio_buf_size - copy_buf->actual < req->actual) { | ||
310 | list_add_tail(©_buf->list, &audio->play_queue); | ||
311 | schedule_work(&audio->playback_work); | ||
312 | copy_buf = f_audio_buffer_alloc(audio_buf_size); | ||
313 | if (IS_ERR(copy_buf)) | ||
314 | return -ENOMEM; | ||
315 | } | ||
316 | |||
317 | memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual); | ||
318 | copy_buf->actual += req->actual; | ||
319 | audio->copy_buf = copy_buf; | ||
320 | |||
321 | err = usb_ep_queue(ep, req, GFP_ATOMIC); | ||
322 | if (err) | ||
323 | ERROR(cdev, "%s queue req: %d\n", ep->name, err); | ||
324 | |||
325 | return 0; | ||
326 | |||
327 | } | ||
328 | |||
329 | static void f_audio_complete(struct usb_ep *ep, struct usb_request *req) | ||
330 | { | ||
331 | struct f_audio *audio = req->context; | ||
332 | int status = req->status; | ||
333 | u32 data = 0; | ||
334 | struct usb_ep *out_ep = audio->out_ep; | ||
335 | |||
336 | switch (status) { | ||
337 | |||
338 | case 0: /* normal completion? */ | ||
339 | if (ep == out_ep) | ||
340 | f_audio_out_ep_complete(ep, req); | ||
341 | else if (audio->set_con) { | ||
342 | memcpy(&data, req->buf, req->length); | ||
343 | audio->set_con->set(audio->set_con, audio->set_cmd, | ||
344 | le16_to_cpu(data)); | ||
345 | audio->set_con = NULL; | ||
346 | } | ||
347 | break; | ||
348 | default: | ||
349 | break; | ||
350 | } | ||
351 | } | ||
352 | |||
353 | static int audio_set_intf_req(struct usb_function *f, | ||
354 | const struct usb_ctrlrequest *ctrl) | ||
355 | { | ||
356 | struct f_audio *audio = func_to_audio(f); | ||
357 | struct usb_composite_dev *cdev = f->config->cdev; | ||
358 | struct usb_request *req = cdev->req; | ||
359 | u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); | ||
360 | u16 len = le16_to_cpu(ctrl->wLength); | ||
361 | u16 w_value = le16_to_cpu(ctrl->wValue); | ||
362 | u8 con_sel = (w_value >> 8) & 0xFF; | ||
363 | u8 cmd = (ctrl->bRequest & 0x0F); | ||
364 | struct usb_audio_control_selector *cs; | ||
365 | struct usb_audio_control *con; | ||
366 | |||
367 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", | ||
368 | ctrl->bRequest, w_value, len, id); | ||
369 | |||
370 | list_for_each_entry(cs, &audio->cs, list) { | ||
371 | if (cs->id == id) { | ||
372 | list_for_each_entry(con, &cs->control, list) { | ||
373 | if (con->type == con_sel) { | ||
374 | audio->set_con = con; | ||
375 | break; | ||
376 | } | ||
377 | } | ||
378 | break; | ||
379 | } | ||
380 | } | ||
381 | |||
382 | audio->set_cmd = cmd; | ||
383 | req->context = audio; | ||
384 | req->complete = f_audio_complete; | ||
385 | |||
386 | return len; | ||
387 | } | ||
388 | |||
389 | static int audio_get_intf_req(struct usb_function *f, | ||
390 | const struct usb_ctrlrequest *ctrl) | ||
391 | { | ||
392 | struct f_audio *audio = func_to_audio(f); | ||
393 | struct usb_composite_dev *cdev = f->config->cdev; | ||
394 | struct usb_request *req = cdev->req; | ||
395 | int value = -EOPNOTSUPP; | ||
396 | u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); | ||
397 | u16 len = le16_to_cpu(ctrl->wLength); | ||
398 | u16 w_value = le16_to_cpu(ctrl->wValue); | ||
399 | u8 con_sel = (w_value >> 8) & 0xFF; | ||
400 | u8 cmd = (ctrl->bRequest & 0x0F); | ||
401 | struct usb_audio_control_selector *cs; | ||
402 | struct usb_audio_control *con; | ||
403 | |||
404 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", | ||
405 | ctrl->bRequest, w_value, len, id); | ||
406 | |||
407 | list_for_each_entry(cs, &audio->cs, list) { | ||
408 | if (cs->id == id) { | ||
409 | list_for_each_entry(con, &cs->control, list) { | ||
410 | if (con->type == con_sel && con->get) { | ||
411 | value = con->get(con, cmd); | ||
412 | break; | ||
413 | } | ||
414 | } | ||
415 | break; | ||
416 | } | ||
417 | } | ||
418 | |||
419 | req->context = audio; | ||
420 | req->complete = f_audio_complete; | ||
421 | len = min_t(size_t, sizeof(value), len); | ||
422 | memcpy(req->buf, &value, len); | ||
423 | |||
424 | return len; | ||
425 | } | ||
426 | |||
427 | static int audio_set_endpoint_req(struct usb_function *f, | ||
428 | const struct usb_ctrlrequest *ctrl) | ||
429 | { | ||
430 | struct usb_composite_dev *cdev = f->config->cdev; | ||
431 | int value = -EOPNOTSUPP; | ||
432 | u16 ep = le16_to_cpu(ctrl->wIndex); | ||
433 | u16 len = le16_to_cpu(ctrl->wLength); | ||
434 | u16 w_value = le16_to_cpu(ctrl->wValue); | ||
435 | |||
436 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", | ||
437 | ctrl->bRequest, w_value, len, ep); | ||
438 | |||
439 | switch (ctrl->bRequest) { | ||
440 | case UAC_SET_CUR: | ||
441 | value = len; | ||
442 | break; | ||
443 | |||
444 | case UAC_SET_MIN: | ||
445 | break; | ||
446 | |||
447 | case UAC_SET_MAX: | ||
448 | break; | ||
449 | |||
450 | case UAC_SET_RES: | ||
451 | break; | ||
452 | |||
453 | case UAC_SET_MEM: | ||
454 | break; | ||
455 | |||
456 | default: | ||
457 | break; | ||
458 | } | ||
459 | |||
460 | return value; | ||
461 | } | ||
462 | |||
463 | static int audio_get_endpoint_req(struct usb_function *f, | ||
464 | const struct usb_ctrlrequest *ctrl) | ||
465 | { | ||
466 | struct usb_composite_dev *cdev = f->config->cdev; | ||
467 | int value = -EOPNOTSUPP; | ||
468 | u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); | ||
469 | u16 len = le16_to_cpu(ctrl->wLength); | ||
470 | u16 w_value = le16_to_cpu(ctrl->wValue); | ||
471 | |||
472 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", | ||
473 | ctrl->bRequest, w_value, len, ep); | ||
474 | |||
475 | switch (ctrl->bRequest) { | ||
476 | case UAC_GET_CUR: | ||
477 | case UAC_GET_MIN: | ||
478 | case UAC_GET_MAX: | ||
479 | case UAC_GET_RES: | ||
480 | value = len; | ||
481 | break; | ||
482 | case UAC_GET_MEM: | ||
483 | break; | ||
484 | default: | ||
485 | break; | ||
486 | } | ||
487 | |||
488 | return value; | ||
489 | } | ||
490 | |||
491 | static int | ||
492 | f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) | ||
493 | { | ||
494 | struct usb_composite_dev *cdev = f->config->cdev; | ||
495 | struct usb_request *req = cdev->req; | ||
496 | int value = -EOPNOTSUPP; | ||
497 | u16 w_index = le16_to_cpu(ctrl->wIndex); | ||
498 | u16 w_value = le16_to_cpu(ctrl->wValue); | ||
499 | u16 w_length = le16_to_cpu(ctrl->wLength); | ||
500 | |||
501 | /* composite driver infrastructure handles everything; interface | ||
502 | * activation uses set_alt(). | ||
503 | */ | ||
504 | switch (ctrl->bRequestType) { | ||
505 | case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE: | ||
506 | value = audio_set_intf_req(f, ctrl); | ||
507 | break; | ||
508 | |||
509 | case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE: | ||
510 | value = audio_get_intf_req(f, ctrl); | ||
511 | break; | ||
512 | |||
513 | case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: | ||
514 | value = audio_set_endpoint_req(f, ctrl); | ||
515 | break; | ||
516 | |||
517 | case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: | ||
518 | value = audio_get_endpoint_req(f, ctrl); | ||
519 | break; | ||
520 | |||
521 | default: | ||
522 | ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", | ||
523 | ctrl->bRequestType, ctrl->bRequest, | ||
524 | w_value, w_index, w_length); | ||
525 | } | ||
526 | |||
527 | /* respond with data transfer or status phase? */ | ||
528 | if (value >= 0) { | ||
529 | DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n", | ||
530 | ctrl->bRequestType, ctrl->bRequest, | ||
531 | w_value, w_index, w_length); | ||
532 | req->zero = 0; | ||
533 | req->length = value; | ||
534 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | ||
535 | if (value < 0) | ||
536 | ERROR(cdev, "audio response on err %d\n", value); | ||
537 | } | ||
538 | |||
539 | /* device either stalls (value < 0) or reports success */ | ||
540 | return value; | ||
541 | } | ||
542 | |||
543 | static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | ||
544 | { | ||
545 | struct f_audio *audio = func_to_audio(f); | ||
546 | struct usb_composite_dev *cdev = f->config->cdev; | ||
547 | struct usb_ep *out_ep = audio->out_ep; | ||
548 | struct usb_request *req; | ||
549 | int i = 0, err = 0; | ||
550 | |||
551 | DBG(cdev, "intf %d, alt %d\n", intf, alt); | ||
552 | |||
553 | if (intf == 1) { | ||
554 | if (alt == 1) { | ||
555 | usb_ep_enable(out_ep); | ||
556 | out_ep->driver_data = audio; | ||
557 | audio->copy_buf = f_audio_buffer_alloc(audio_buf_size); | ||
558 | if (IS_ERR(audio->copy_buf)) | ||
559 | return -ENOMEM; | ||
560 | |||
561 | /* | ||
562 | * allocate a bunch of read buffers | ||
563 | * and queue them all at once. | ||
564 | */ | ||
565 | for (i = 0; i < req_count && err == 0; i++) { | ||
566 | req = usb_ep_alloc_request(out_ep, GFP_ATOMIC); | ||
567 | if (req) { | ||
568 | req->buf = kzalloc(req_buf_size, | ||
569 | GFP_ATOMIC); | ||
570 | if (req->buf) { | ||
571 | req->length = req_buf_size; | ||
572 | req->context = audio; | ||
573 | req->complete = | ||
574 | f_audio_complete; | ||
575 | err = usb_ep_queue(out_ep, | ||
576 | req, GFP_ATOMIC); | ||
577 | if (err) | ||
578 | ERROR(cdev, | ||
579 | "%s queue req: %d\n", | ||
580 | out_ep->name, err); | ||
581 | } else | ||
582 | err = -ENOMEM; | ||
583 | } else | ||
584 | err = -ENOMEM; | ||
585 | } | ||
586 | |||
587 | } else { | ||
588 | struct f_audio_buf *copy_buf = audio->copy_buf; | ||
589 | if (copy_buf) { | ||
590 | list_add_tail(©_buf->list, | ||
591 | &audio->play_queue); | ||
592 | schedule_work(&audio->playback_work); | ||
593 | } | ||
594 | } | ||
595 | } | ||
596 | |||
597 | return err; | ||
598 | } | ||
599 | |||
600 | static void f_audio_disable(struct usb_function *f) | ||
601 | { | ||
602 | return; | ||
603 | } | ||
604 | |||
605 | /*-------------------------------------------------------------------------*/ | ||
606 | |||
607 | static void f_audio_build_desc(struct f_audio *audio) | ||
608 | { | ||
609 | struct gaudio *card = &audio->card; | ||
610 | u8 *sam_freq; | ||
611 | int rate; | ||
612 | |||
613 | /* Set channel numbers */ | ||
614 | input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card); | ||
615 | as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card); | ||
616 | |||
617 | /* Set sample rates */ | ||
618 | rate = u_audio_get_playback_rate(card); | ||
619 | sam_freq = as_type_i_desc.tSamFreq[0]; | ||
620 | memcpy(sam_freq, &rate, 3); | ||
621 | |||
622 | /* Todo: Set Sample bits and other parameters */ | ||
623 | |||
624 | return; | ||
625 | } | ||
626 | |||
627 | /* audio function driver setup/binding */ | ||
628 | static int __init | ||
629 | f_audio_bind(struct usb_configuration *c, struct usb_function *f) | ||
630 | { | ||
631 | struct usb_composite_dev *cdev = c->cdev; | ||
632 | struct f_audio *audio = func_to_audio(f); | ||
633 | int status; | ||
634 | struct usb_ep *ep = NULL; | ||
635 | |||
636 | f_audio_build_desc(audio); | ||
637 | |||
638 | /* allocate instance-specific interface IDs, and patch descriptors */ | ||
639 | status = usb_interface_id(c, f); | ||
640 | if (status < 0) | ||
641 | goto fail; | ||
642 | ac_interface_desc.bInterfaceNumber = status; | ||
643 | |||
644 | status = usb_interface_id(c, f); | ||
645 | if (status < 0) | ||
646 | goto fail; | ||
647 | as_interface_alt_0_desc.bInterfaceNumber = status; | ||
648 | as_interface_alt_1_desc.bInterfaceNumber = status; | ||
649 | |||
650 | status = -ENODEV; | ||
651 | |||
652 | /* allocate instance-specific endpoints */ | ||
653 | ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc); | ||
654 | if (!ep) | ||
655 | goto fail; | ||
656 | audio->out_ep = ep; | ||
657 | audio->out_ep->desc = &as_out_ep_desc; | ||
658 | ep->driver_data = cdev; /* claim */ | ||
659 | |||
660 | status = -ENOMEM; | ||
661 | |||
662 | /* copy descriptors, and track endpoint copies */ | ||
663 | status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL); | ||
664 | if (status) | ||
665 | goto fail; | ||
666 | return 0; | ||
667 | |||
668 | fail: | ||
669 | if (ep) | ||
670 | ep->driver_data = NULL; | ||
671 | return status; | ||
672 | } | ||
673 | |||
674 | static void | ||
675 | f_audio_unbind(struct usb_configuration *c, struct usb_function *f) | ||
676 | { | ||
677 | struct f_audio *audio = func_to_audio(f); | ||
678 | |||
679 | usb_free_all_descriptors(f); | ||
680 | kfree(audio); | ||
681 | } | ||
682 | |||
683 | /*-------------------------------------------------------------------------*/ | ||
684 | |||
685 | static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value) | ||
686 | { | ||
687 | con->data[cmd] = value; | ||
688 | |||
689 | return 0; | ||
690 | } | ||
691 | |||
692 | static int generic_get_cmd(struct usb_audio_control *con, u8 cmd) | ||
693 | { | ||
694 | return con->data[cmd]; | ||
695 | } | ||
696 | |||
697 | /* Todo: add more control selecotor dynamically */ | ||
698 | static int __init control_selector_init(struct f_audio *audio) | ||
699 | { | ||
700 | INIT_LIST_HEAD(&audio->cs); | ||
701 | list_add(&feature_unit.list, &audio->cs); | ||
702 | |||
703 | INIT_LIST_HEAD(&feature_unit.control); | ||
704 | list_add(&mute_control.list, &feature_unit.control); | ||
705 | list_add(&volume_control.list, &feature_unit.control); | ||
706 | |||
707 | volume_control.data[UAC__CUR] = 0xffc0; | ||
708 | volume_control.data[UAC__MIN] = 0xe3a0; | ||
709 | volume_control.data[UAC__MAX] = 0xfff0; | ||
710 | volume_control.data[UAC__RES] = 0x0030; | ||
711 | |||
712 | return 0; | ||
713 | } | ||
714 | |||
715 | /** | ||
716 | * audio_bind_config - add USB audio function to a configuration | ||
717 | * @c: the configuration to supcard the USB audio function | ||
718 | * Context: single threaded during gadget setup | ||
719 | * | ||
720 | * Returns zero on success, else negative errno. | ||
721 | */ | ||
722 | static int __init audio_bind_config(struct usb_configuration *c) | ||
723 | { | ||
724 | struct f_audio *audio; | ||
725 | int status; | ||
726 | |||
727 | /* allocate and initialize one new instance */ | ||
728 | audio = kzalloc(sizeof *audio, GFP_KERNEL); | ||
729 | if (!audio) | ||
730 | return -ENOMEM; | ||
731 | |||
732 | audio->card.func.name = "g_audio"; | ||
733 | audio->card.gadget = c->cdev->gadget; | ||
734 | |||
735 | INIT_LIST_HEAD(&audio->play_queue); | ||
736 | spin_lock_init(&audio->lock); | ||
737 | |||
738 | /* set up ASLA audio devices */ | ||
739 | status = gaudio_setup(&audio->card); | ||
740 | if (status < 0) | ||
741 | goto setup_fail; | ||
742 | |||
743 | audio->card.func.strings = audio_strings; | ||
744 | audio->card.func.bind = f_audio_bind; | ||
745 | audio->card.func.unbind = f_audio_unbind; | ||
746 | audio->card.func.set_alt = f_audio_set_alt; | ||
747 | audio->card.func.setup = f_audio_setup; | ||
748 | audio->card.func.disable = f_audio_disable; | ||
749 | |||
750 | control_selector_init(audio); | ||
751 | |||
752 | INIT_WORK(&audio->playback_work, f_audio_playback_work); | ||
753 | |||
754 | status = usb_add_function(c, &audio->card.func); | ||
755 | if (status) | ||
756 | goto add_fail; | ||
757 | |||
758 | INFO(c->cdev, "audio_buf_size %d, req_buf_size %d, req_count %d\n", | ||
759 | audio_buf_size, req_buf_size, req_count); | ||
760 | |||
761 | return status; | ||
762 | |||
763 | add_fail: | ||
764 | gaudio_cleanup(); | ||
765 | setup_fail: | ||
766 | kfree(audio); | ||
767 | return status; | ||
768 | } | ||