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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 12 years 9 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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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 <asm/atomic.h> |
16 | |
17 | #include "u_audio.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 __initdata = { |
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 | /* string IDs are assigned dynamically */ |
220 | |
221 | #define STRING_MANUFACTURER_IDX 0 |
222 | #define STRING_PRODUCT_IDX 1 |
223 | |
224 | static char manufacturer[50]; |
225 | |
226 | static struct usb_string strings_dev[] = { |
227 | [STRING_MANUFACTURER_IDX].s = manufacturer, |
228 | [STRING_PRODUCT_IDX].s = DRIVER_DESC, |
229 | { } /* end of list */ |
230 | }; |
231 | |
232 | static struct usb_gadget_strings stringtab_dev = { |
233 | .language = 0x0409, /* en-us */ |
234 | .strings = strings_dev, |
235 | }; |
236 | |
237 | static struct usb_gadget_strings *audio_strings[] = { |
238 | &stringtab_dev, |
239 | NULL, |
240 | }; |
241 | |
242 | /* |
243 | * This function is an ALSA sound card following USB Audio Class Spec 1.0. |
244 | */ |
245 | |
246 | /*-------------------------------------------------------------------------*/ |
247 | struct f_audio_buf { |
248 | u8 *buf; |
249 | int actual; |
250 | struct list_head list; |
251 | }; |
252 | |
253 | static struct f_audio_buf *f_audio_buffer_alloc(int buf_size) |
254 | { |
255 | struct f_audio_buf *copy_buf; |
256 | |
257 | copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC); |
258 | if (!copy_buf) |
259 | return ERR_PTR(-ENOMEM); |
260 | |
261 | copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC); |
262 | if (!copy_buf->buf) { |
263 | kfree(copy_buf); |
264 | return ERR_PTR(-ENOMEM); |
265 | } |
266 | |
267 | return copy_buf; |
268 | } |
269 | |
270 | static void f_audio_buffer_free(struct f_audio_buf *audio_buf) |
271 | { |
272 | kfree(audio_buf->buf); |
273 | kfree(audio_buf); |
274 | } |
275 | /*-------------------------------------------------------------------------*/ |
276 | |
277 | struct f_audio { |
278 | struct gaudio card; |
279 | |
280 | /* endpoints handle full and/or high speeds */ |
281 | struct usb_ep *out_ep; |
282 | struct usb_endpoint_descriptor *out_desc; |
283 | |
284 | spinlock_t lock; |
285 | struct f_audio_buf *copy_buf; |
286 | struct work_struct playback_work; |
287 | struct list_head play_queue; |
288 | |
289 | /* Control Set command */ |
290 | struct list_head cs; |
291 | u8 set_cmd; |
292 | struct usb_audio_control *set_con; |
293 | }; |
294 | |
295 | static inline struct f_audio *func_to_audio(struct usb_function *f) |
296 | { |
297 | return container_of(f, struct f_audio, card.func); |
298 | } |
299 | |
300 | /*-------------------------------------------------------------------------*/ |
301 | |
302 | static void f_audio_playback_work(struct work_struct *data) |
303 | { |
304 | struct f_audio *audio = container_of(data, struct f_audio, |
305 | playback_work); |
306 | struct f_audio_buf *play_buf; |
307 | |
308 | spin_lock_irq(&audio->lock); |
309 | if (list_empty(&audio->play_queue)) { |
310 | spin_unlock_irq(&audio->lock); |
311 | return; |
312 | } |
313 | play_buf = list_first_entry(&audio->play_queue, |
314 | struct f_audio_buf, list); |
315 | list_del(&play_buf->list); |
316 | spin_unlock_irq(&audio->lock); |
317 | |
318 | u_audio_playback(&audio->card, play_buf->buf, play_buf->actual); |
319 | f_audio_buffer_free(play_buf); |
320 | } |
321 | |
322 | static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req) |
323 | { |
324 | struct f_audio *audio = req->context; |
325 | struct usb_composite_dev *cdev = audio->card.func.config->cdev; |
326 | struct f_audio_buf *copy_buf = audio->copy_buf; |
327 | int err; |
328 | |
329 | if (!copy_buf) |
330 | return -EINVAL; |
331 | |
332 | /* Copy buffer is full, add it to the play_queue */ |
333 | if (audio_buf_size - copy_buf->actual < req->actual) { |
334 | list_add_tail(©_buf->list, &audio->play_queue); |
335 | schedule_work(&audio->playback_work); |
336 | copy_buf = f_audio_buffer_alloc(audio_buf_size); |
337 | if (IS_ERR(copy_buf)) |
338 | return -ENOMEM; |
339 | } |
340 | |
341 | memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual); |
342 | copy_buf->actual += req->actual; |
343 | audio->copy_buf = copy_buf; |
344 | |
345 | err = usb_ep_queue(ep, req, GFP_ATOMIC); |
346 | if (err) |
347 | ERROR(cdev, "%s queue req: %d\n", ep->name, err); |
348 | |
349 | return 0; |
350 | |
351 | } |
352 | |
353 | static void f_audio_complete(struct usb_ep *ep, struct usb_request *req) |
354 | { |
355 | struct f_audio *audio = req->context; |
356 | int status = req->status; |
357 | u32 data = 0; |
358 | struct usb_ep *out_ep = audio->out_ep; |
359 | |
360 | switch (status) { |
361 | |
362 | case 0: /* normal completion? */ |
363 | if (ep == out_ep) |
364 | f_audio_out_ep_complete(ep, req); |
365 | else if (audio->set_con) { |
366 | memcpy(&data, req->buf, req->length); |
367 | audio->set_con->set(audio->set_con, audio->set_cmd, |
368 | le16_to_cpu(data)); |
369 | audio->set_con = NULL; |
370 | } |
371 | break; |
372 | default: |
373 | break; |
374 | } |
375 | } |
376 | |
377 | static int audio_set_intf_req(struct usb_function *f, |
378 | const struct usb_ctrlrequest *ctrl) |
379 | { |
380 | struct f_audio *audio = func_to_audio(f); |
381 | struct usb_composite_dev *cdev = f->config->cdev; |
382 | struct usb_request *req = cdev->req; |
383 | u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); |
384 | u16 len = le16_to_cpu(ctrl->wLength); |
385 | u16 w_value = le16_to_cpu(ctrl->wValue); |
386 | u8 con_sel = (w_value >> 8) & 0xFF; |
387 | u8 cmd = (ctrl->bRequest & 0x0F); |
388 | struct usb_audio_control_selector *cs; |
389 | struct usb_audio_control *con; |
390 | |
391 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", |
392 | ctrl->bRequest, w_value, len, id); |
393 | |
394 | list_for_each_entry(cs, &audio->cs, list) { |
395 | if (cs->id == id) { |
396 | list_for_each_entry(con, &cs->control, list) { |
397 | if (con->type == con_sel) { |
398 | audio->set_con = con; |
399 | break; |
400 | } |
401 | } |
402 | break; |
403 | } |
404 | } |
405 | |
406 | audio->set_cmd = cmd; |
407 | req->context = audio; |
408 | req->complete = f_audio_complete; |
409 | |
410 | return len; |
411 | } |
412 | |
413 | static int audio_get_intf_req(struct usb_function *f, |
414 | const struct usb_ctrlrequest *ctrl) |
415 | { |
416 | struct f_audio *audio = func_to_audio(f); |
417 | struct usb_composite_dev *cdev = f->config->cdev; |
418 | struct usb_request *req = cdev->req; |
419 | int value = -EOPNOTSUPP; |
420 | u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); |
421 | u16 len = le16_to_cpu(ctrl->wLength); |
422 | u16 w_value = le16_to_cpu(ctrl->wValue); |
423 | u8 con_sel = (w_value >> 8) & 0xFF; |
424 | u8 cmd = (ctrl->bRequest & 0x0F); |
425 | struct usb_audio_control_selector *cs; |
426 | struct usb_audio_control *con; |
427 | |
428 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", |
429 | ctrl->bRequest, w_value, len, id); |
430 | |
431 | list_for_each_entry(cs, &audio->cs, list) { |
432 | if (cs->id == id) { |
433 | list_for_each_entry(con, &cs->control, list) { |
434 | if (con->type == con_sel && con->get) { |
435 | value = con->get(con, cmd); |
436 | break; |
437 | } |
438 | } |
439 | break; |
440 | } |
441 | } |
442 | |
443 | req->context = audio; |
444 | req->complete = f_audio_complete; |
445 | memcpy(req->buf, &value, len); |
446 | |
447 | return len; |
448 | } |
449 | |
450 | static int audio_set_endpoint_req(struct usb_function *f, |
451 | const struct usb_ctrlrequest *ctrl) |
452 | { |
453 | struct usb_composite_dev *cdev = f->config->cdev; |
454 | int value = -EOPNOTSUPP; |
455 | u16 ep = le16_to_cpu(ctrl->wIndex); |
456 | u16 len = le16_to_cpu(ctrl->wLength); |
457 | u16 w_value = le16_to_cpu(ctrl->wValue); |
458 | |
459 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", |
460 | ctrl->bRequest, w_value, len, ep); |
461 | |
462 | switch (ctrl->bRequest) { |
463 | case UAC_SET_CUR: |
464 | value = 0; |
465 | break; |
466 | |
467 | case UAC_SET_MIN: |
468 | break; |
469 | |
470 | case UAC_SET_MAX: |
471 | break; |
472 | |
473 | case UAC_SET_RES: |
474 | break; |
475 | |
476 | case UAC_SET_MEM: |
477 | break; |
478 | |
479 | default: |
480 | break; |
481 | } |
482 | |
483 | return value; |
484 | } |
485 | |
486 | static int audio_get_endpoint_req(struct usb_function *f, |
487 | const struct usb_ctrlrequest *ctrl) |
488 | { |
489 | struct usb_composite_dev *cdev = f->config->cdev; |
490 | int value = -EOPNOTSUPP; |
491 | u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); |
492 | u16 len = le16_to_cpu(ctrl->wLength); |
493 | u16 w_value = le16_to_cpu(ctrl->wValue); |
494 | |
495 | DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", |
496 | ctrl->bRequest, w_value, len, ep); |
497 | |
498 | switch (ctrl->bRequest) { |
499 | case UAC_GET_CUR: |
500 | case UAC_GET_MIN: |
501 | case UAC_GET_MAX: |
502 | case UAC_GET_RES: |
503 | value = 3; |
504 | break; |
505 | case UAC_GET_MEM: |
506 | break; |
507 | default: |
508 | break; |
509 | } |
510 | |
511 | return value; |
512 | } |
513 | |
514 | static int |
515 | f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) |
516 | { |
517 | struct usb_composite_dev *cdev = f->config->cdev; |
518 | struct usb_request *req = cdev->req; |
519 | int value = -EOPNOTSUPP; |
520 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
521 | u16 w_value = le16_to_cpu(ctrl->wValue); |
522 | u16 w_length = le16_to_cpu(ctrl->wLength); |
523 | |
524 | /* composite driver infrastructure handles everything; interface |
525 | * activation uses set_alt(). |
526 | */ |
527 | switch (ctrl->bRequestType) { |
528 | case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
529 | value = audio_set_intf_req(f, ctrl); |
530 | break; |
531 | |
532 | case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
533 | value = audio_get_intf_req(f, ctrl); |
534 | break; |
535 | |
536 | case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: |
537 | value = audio_set_endpoint_req(f, ctrl); |
538 | break; |
539 | |
540 | case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: |
541 | value = audio_get_endpoint_req(f, ctrl); |
542 | break; |
543 | |
544 | default: |
545 | ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", |
546 | ctrl->bRequestType, ctrl->bRequest, |
547 | w_value, w_index, w_length); |
548 | } |
549 | |
550 | /* respond with data transfer or status phase? */ |
551 | if (value >= 0) { |
552 | DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n", |
553 | ctrl->bRequestType, ctrl->bRequest, |
554 | w_value, w_index, w_length); |
555 | req->zero = 0; |
556 | req->length = value; |
557 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); |
558 | if (value < 0) |
559 | ERROR(cdev, "audio response on err %d\n", value); |
560 | } |
561 | |
562 | /* device either stalls (value < 0) or reports success */ |
563 | return value; |
564 | } |
565 | |
566 | static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) |
567 | { |
568 | struct f_audio *audio = func_to_audio(f); |
569 | struct usb_composite_dev *cdev = f->config->cdev; |
570 | struct usb_ep *out_ep = audio->out_ep; |
571 | struct usb_request *req; |
572 | int i = 0, err = 0; |
573 | |
574 | DBG(cdev, "intf %d, alt %d\n", intf, alt); |
575 | |
576 | if (intf == 1) { |
577 | if (alt == 1) { |
578 | usb_ep_enable(out_ep, audio->out_desc); |
579 | out_ep->driver_data = audio; |
580 | audio->copy_buf = f_audio_buffer_alloc(audio_buf_size); |
581 | if (IS_ERR(audio->copy_buf)) |
582 | return -ENOMEM; |
583 | |
584 | /* |
585 | * allocate a bunch of read buffers |
586 | * and queue them all at once. |
587 | */ |
588 | for (i = 0; i < req_count && err == 0; i++) { |
589 | req = usb_ep_alloc_request(out_ep, GFP_ATOMIC); |
590 | if (req) { |
591 | req->buf = kzalloc(req_buf_size, |
592 | GFP_ATOMIC); |
593 | if (req->buf) { |
594 | req->length = req_buf_size; |
595 | req->context = audio; |
596 | req->complete = |
597 | f_audio_complete; |
598 | err = usb_ep_queue(out_ep, |
599 | req, GFP_ATOMIC); |
600 | if (err) |
601 | ERROR(cdev, |
602 | "%s queue req: %d\n", |
603 | out_ep->name, err); |
604 | } else |
605 | err = -ENOMEM; |
606 | } else |
607 | err = -ENOMEM; |
608 | } |
609 | |
610 | } else { |
611 | struct f_audio_buf *copy_buf = audio->copy_buf; |
612 | if (copy_buf) { |
613 | list_add_tail(©_buf->list, |
614 | &audio->play_queue); |
615 | schedule_work(&audio->playback_work); |
616 | } |
617 | } |
618 | } |
619 | |
620 | return err; |
621 | } |
622 | |
623 | static void f_audio_disable(struct usb_function *f) |
624 | { |
625 | return; |
626 | } |
627 | |
628 | /*-------------------------------------------------------------------------*/ |
629 | |
630 | static void f_audio_build_desc(struct f_audio *audio) |
631 | { |
632 | struct gaudio *card = &audio->card; |
633 | u8 *sam_freq; |
634 | int rate; |
635 | |
636 | /* Set channel numbers */ |
637 | input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card); |
638 | as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card); |
639 | |
640 | /* Set sample rates */ |
641 | rate = u_audio_get_playback_rate(card); |
642 | sam_freq = as_type_i_desc.tSamFreq[0]; |
643 | memcpy(sam_freq, &rate, 3); |
644 | |
645 | /* Todo: Set Sample bits and other parameters */ |
646 | |
647 | return; |
648 | } |
649 | |
650 | /* audio function driver setup/binding */ |
651 | static int __init |
652 | f_audio_bind(struct usb_configuration *c, struct usb_function *f) |
653 | { |
654 | struct usb_composite_dev *cdev = c->cdev; |
655 | struct f_audio *audio = func_to_audio(f); |
656 | int status; |
657 | struct usb_ep *ep; |
658 | |
659 | f_audio_build_desc(audio); |
660 | |
661 | /* allocate instance-specific interface IDs, and patch descriptors */ |
662 | status = usb_interface_id(c, f); |
663 | if (status < 0) |
664 | goto fail; |
665 | ac_interface_desc.bInterfaceNumber = status; |
666 | |
667 | status = usb_interface_id(c, f); |
668 | if (status < 0) |
669 | goto fail; |
670 | as_interface_alt_0_desc.bInterfaceNumber = status; |
671 | as_interface_alt_1_desc.bInterfaceNumber = status; |
672 | |
673 | status = -ENODEV; |
674 | |
675 | /* allocate instance-specific endpoints */ |
676 | ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc); |
677 | if (!ep) |
678 | goto fail; |
679 | audio->out_ep = ep; |
680 | ep->driver_data = cdev; /* claim */ |
681 | |
682 | status = -ENOMEM; |
683 | |
684 | /* supcard all relevant hardware speeds... we expect that when |
685 | * hardware is dual speed, all bulk-capable endpoints work at |
686 | * both speeds |
687 | */ |
688 | |
689 | /* copy descriptors, and track endpoint copies */ |
690 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
691 | c->highspeed = true; |
692 | f->hs_descriptors = usb_copy_descriptors(f_audio_desc); |
693 | } else |
694 | f->descriptors = usb_copy_descriptors(f_audio_desc); |
695 | |
696 | return 0; |
697 | |
698 | fail: |
699 | |
700 | return status; |
701 | } |
702 | |
703 | static void |
704 | f_audio_unbind(struct usb_configuration *c, struct usb_function *f) |
705 | { |
706 | struct f_audio *audio = func_to_audio(f); |
707 | |
708 | usb_free_descriptors(f->descriptors); |
709 | usb_free_descriptors(f->hs_descriptors); |
710 | kfree(audio); |
711 | } |
712 | |
713 | /*-------------------------------------------------------------------------*/ |
714 | |
715 | static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value) |
716 | { |
717 | con->data[cmd] = value; |
718 | |
719 | return 0; |
720 | } |
721 | |
722 | static int generic_get_cmd(struct usb_audio_control *con, u8 cmd) |
723 | { |
724 | return con->data[cmd]; |
725 | } |
726 | |
727 | /* Todo: add more control selecotor dynamically */ |
728 | int __init control_selector_init(struct f_audio *audio) |
729 | { |
730 | INIT_LIST_HEAD(&audio->cs); |
731 | list_add(&feature_unit.list, &audio->cs); |
732 | |
733 | INIT_LIST_HEAD(&feature_unit.control); |
734 | list_add(&mute_control.list, &feature_unit.control); |
735 | list_add(&volume_control.list, &feature_unit.control); |
736 | |
737 | volume_control.data[UAC__CUR] = 0xffc0; |
738 | volume_control.data[UAC__MIN] = 0xe3a0; |
739 | volume_control.data[UAC__MAX] = 0xfff0; |
740 | volume_control.data[UAC__RES] = 0x0030; |
741 | |
742 | return 0; |
743 | } |
744 | |
745 | /** |
746 | * audio_bind_config - add USB audio function to a configuration |
747 | * @c: the configuration to supcard the USB audio function |
748 | * Context: single threaded during gadget setup |
749 | * |
750 | * Returns zero on success, else negative errno. |
751 | */ |
752 | int __init audio_bind_config(struct usb_configuration *c) |
753 | { |
754 | struct f_audio *audio; |
755 | int status; |
756 | |
757 | /* allocate and initialize one new instance */ |
758 | audio = kzalloc(sizeof *audio, GFP_KERNEL); |
759 | if (!audio) |
760 | return -ENOMEM; |
761 | |
762 | audio->card.func.name = "g_audio"; |
763 | audio->card.gadget = c->cdev->gadget; |
764 | |
765 | INIT_LIST_HEAD(&audio->play_queue); |
766 | spin_lock_init(&audio->lock); |
767 | |
768 | /* set up ASLA audio devices */ |
769 | status = gaudio_setup(&audio->card); |
770 | if (status < 0) |
771 | goto setup_fail; |
772 | |
773 | audio->card.func.strings = audio_strings; |
774 | audio->card.func.bind = f_audio_bind; |
775 | audio->card.func.unbind = f_audio_unbind; |
776 | audio->card.func.set_alt = f_audio_set_alt; |
777 | audio->card.func.setup = f_audio_setup; |
778 | audio->card.func.disable = f_audio_disable; |
779 | audio->out_desc = &as_out_ep_desc; |
780 | |
781 | control_selector_init(audio); |
782 | |
783 | INIT_WORK(&audio->playback_work, f_audio_playback_work); |
784 | |
785 | status = usb_add_function(c, &audio->card.func); |
786 | if (status) |
787 | goto add_fail; |
788 | |
789 | INFO(c->cdev, "audio_buf_size %d, req_buf_size %d, req_count %d\n", |
790 | audio_buf_size, req_buf_size, req_count); |
791 | |
792 | return status; |
793 | |
794 | add_fail: |
795 | gaudio_cleanup(); |
796 | setup_fail: |
797 | kfree(audio); |
798 | return status; |
799 | } |
800 |
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9