Commit | Line | Data |
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c6994e6f BW |
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 | ||
5a0e3ad6 | 12 | #include <linux/slab.h> |
c6994e6f BW |
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 | ||
b95cd7ec LP |
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 | ||
c6994e6f BW |
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 | ||
512ad27d | 57 | DECLARE_UAC_AC_HEADER_DESCRIPTOR(2); |
c6994e6f | 58 | |
512ad27d | 59 | #define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES) |
d16f1726 CC |
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)) | |
c6994e6f | 63 | /* B.3.2 Class-Specific AC Interface Descriptor */ |
69da9bcb | 64 | static struct uac1_ac_header_descriptor_2 ac_header_desc = { |
512ad27d | 65 | .bLength = UAC_DT_AC_HEADER_LENGTH, |
c6994e6f | 66 | .bDescriptorType = USB_DT_CS_INTERFACE, |
512ad27d | 67 | .bDescriptorSubtype = UAC_HEADER, |
c6994e6f | 68 | .bcdADC = __constant_cpu_to_le16(0x0100), |
d16f1726 | 69 | .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH), |
c6994e6f BW |
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 | |
512ad27d LP |
78 | static struct uac_input_terminal_descriptor input_terminal_desc = { |
79 | .bLength = UAC_DT_INPUT_TERMINAL_SIZE, | |
c6994e6f | 80 | .bDescriptorType = USB_DT_CS_INTERFACE, |
512ad27d | 81 | .bDescriptorSubtype = UAC_INPUT_TERMINAL, |
c6994e6f | 82 | .bTerminalID = INPUT_TERMINAL_ID, |
512ad27d | 83 | .wTerminalType = UAC_TERMINAL_STREAMING, |
c6994e6f BW |
84 | .bAssocTerminal = 0, |
85 | .wChannelConfig = 0x3, | |
86 | }; | |
87 | ||
512ad27d | 88 | DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0); |
c6994e6f BW |
89 | |
90 | #define FEATURE_UNIT_ID 2 | |
512ad27d LP |
91 | static struct uac_feature_unit_descriptor_0 feature_unit_desc = { |
92 | .bLength = UAC_DT_FEATURE_UNIT_SIZE(0), | |
c6994e6f | 93 | .bDescriptorType = USB_DT_CS_INTERFACE, |
512ad27d | 94 | .bDescriptorSubtype = UAC_FEATURE_UNIT, |
c6994e6f BW |
95 | .bUnitID = FEATURE_UNIT_ID, |
96 | .bSourceID = INPUT_TERMINAL_ID, | |
97 | .bControlSize = 2, | |
512ad27d | 98 | .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME), |
c6994e6f BW |
99 | }; |
100 | ||
101 | static struct usb_audio_control mute_control = { | |
102 | .list = LIST_HEAD_INIT(mute_control.list), | |
103 | .name = "Mute Control", | |
f07ff97b | 104 | .type = UAC_FU_MUTE, |
c6994e6f BW |
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", | |
f07ff97b | 113 | .type = UAC_FU_VOLUME, |
c6994e6f BW |
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", | |
512ad27d | 123 | .type = UAC_FEATURE_UNIT, |
c6994e6f BW |
124 | .desc = (struct usb_descriptor_header *)&feature_unit_desc, |
125 | }; | |
126 | ||
127 | #define OUTPUT_TERMINAL_ID 3 | |
69da9bcb | 128 | static struct uac1_output_terminal_descriptor output_terminal_desc = { |
512ad27d | 129 | .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE, |
c6994e6f | 130 | .bDescriptorType = USB_DT_CS_INTERFACE, |
512ad27d | 131 | .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, |
c6994e6f | 132 | .bTerminalID = OUTPUT_TERMINAL_ID, |
512ad27d | 133 | .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER, |
c6994e6f BW |
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 */ | |
69da9bcb | 158 | static struct uac1_as_header_descriptor as_header_desc = { |
512ad27d | 159 | .bLength = UAC_DT_AS_HEADER_SIZE, |
c6994e6f | 160 | .bDescriptorType = USB_DT_CS_INTERFACE, |
512ad27d | 161 | .bDescriptorSubtype = UAC_AS_GENERAL, |
c6994e6f BW |
162 | .bTerminalLink = INPUT_TERMINAL_ID, |
163 | .bDelay = 1, | |
512ad27d | 164 | .wFormatTag = UAC_FORMAT_TYPE_I_PCM, |
c6994e6f BW |
165 | }; |
166 | ||
512ad27d | 167 | DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1); |
c6994e6f | 168 | |
512ad27d LP |
169 | static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = { |
170 | .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1), | |
c6994e6f | 171 | .bDescriptorType = USB_DT_CS_INTERFACE, |
512ad27d LP |
172 | .bDescriptorSubtype = UAC_FORMAT_TYPE, |
173 | .bFormatType = UAC_FORMAT_TYPE_I, | |
c6994e6f BW |
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, | |
85e08ca5 | 184 | .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE |
c6994e6f BW |
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 */ | |
512ad27d LP |
191 | static struct uac_iso_endpoint_descriptor as_iso_out_desc __initdata = { |
192 | .bLength = UAC_ISO_ENDPOINT_DESC_SIZE, | |
c6994e6f | 193 | .bDescriptorType = USB_DT_CS_ENDPOINT, |
512ad27d | 194 | .bDescriptorSubtype = UAC_EP_GENERAL, |
c6994e6f BW |
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) | |
ff3b968c | 259 | return ERR_PTR(-ENOMEM); |
c6994e6f BW |
260 | |
261 | copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC); | |
262 | if (!copy_buf->buf) { | |
263 | kfree(copy_buf); | |
ff3b968c | 264 | return ERR_PTR(-ENOMEM); |
c6994e6f BW |
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); | |
c6994e6f BW |
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); | |
ff3b968c | 337 | if (IS_ERR(copy_buf)) |
c6994e6f BW |
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 | ||
0ad72524 LP |
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 | ||
c6994e6f BW |
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 | ||
0ad72524 LP |
524 | /* composite driver infrastructure handles everything; interface |
525 | * activation uses set_alt(). | |
c6994e6f BW |
526 | */ |
527 | switch (ctrl->bRequestType) { | |
512ad27d | 528 | case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
c6994e6f BW |
529 | value = audio_set_intf_req(f, ctrl); |
530 | break; | |
531 | ||
512ad27d | 532 | case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
c6994e6f BW |
533 | value = audio_get_intf_req(f, ctrl); |
534 | break; | |
535 | ||
0ad72524 LP |
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 | ||
c6994e6f BW |
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); | |
ff3b968c JL |
581 | if (IS_ERR(audio->copy_buf)) |
582 | return -ENOMEM; | |
c6994e6f BW |
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 | kfree(audio); | |
710 | } | |
711 | ||
712 | /*-------------------------------------------------------------------------*/ | |
713 | ||
b95cd7ec LP |
714 | static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value) |
715 | { | |
716 | con->data[cmd] = value; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
721 | static int generic_get_cmd(struct usb_audio_control *con, u8 cmd) | |
722 | { | |
723 | return con->data[cmd]; | |
724 | } | |
725 | ||
c6994e6f BW |
726 | /* Todo: add more control selecotor dynamically */ |
727 | int __init control_selector_init(struct f_audio *audio) | |
728 | { | |
729 | INIT_LIST_HEAD(&audio->cs); | |
730 | list_add(&feature_unit.list, &audio->cs); | |
731 | ||
732 | INIT_LIST_HEAD(&feature_unit.control); | |
733 | list_add(&mute_control.list, &feature_unit.control); | |
734 | list_add(&volume_control.list, &feature_unit.control); | |
735 | ||
512ad27d LP |
736 | volume_control.data[UAC__CUR] = 0xffc0; |
737 | volume_control.data[UAC__MIN] = 0xe3a0; | |
738 | volume_control.data[UAC__MAX] = 0xfff0; | |
739 | volume_control.data[UAC__RES] = 0x0030; | |
c6994e6f BW |
740 | |
741 | return 0; | |
742 | } | |
743 | ||
744 | /** | |
25985edc | 745 | * audio_bind_config - add USB audio function to a configuration |
c6994e6f BW |
746 | * @c: the configuration to supcard the USB audio function |
747 | * Context: single threaded during gadget setup | |
748 | * | |
749 | * Returns zero on success, else negative errno. | |
750 | */ | |
751 | int __init audio_bind_config(struct usb_configuration *c) | |
752 | { | |
753 | struct f_audio *audio; | |
754 | int status; | |
755 | ||
756 | /* allocate and initialize one new instance */ | |
757 | audio = kzalloc(sizeof *audio, GFP_KERNEL); | |
758 | if (!audio) | |
759 | return -ENOMEM; | |
760 | ||
761 | audio->card.func.name = "g_audio"; | |
762 | audio->card.gadget = c->cdev->gadget; | |
763 | ||
764 | INIT_LIST_HEAD(&audio->play_queue); | |
765 | spin_lock_init(&audio->lock); | |
766 | ||
767 | /* set up ASLA audio devices */ | |
768 | status = gaudio_setup(&audio->card); | |
769 | if (status < 0) | |
770 | goto setup_fail; | |
771 | ||
772 | audio->card.func.strings = audio_strings; | |
773 | audio->card.func.bind = f_audio_bind; | |
774 | audio->card.func.unbind = f_audio_unbind; | |
775 | audio->card.func.set_alt = f_audio_set_alt; | |
776 | audio->card.func.setup = f_audio_setup; | |
777 | audio->card.func.disable = f_audio_disable; | |
778 | audio->out_desc = &as_out_ep_desc; | |
779 | ||
780 | control_selector_init(audio); | |
781 | ||
782 | INIT_WORK(&audio->playback_work, f_audio_playback_work); | |
783 | ||
784 | status = usb_add_function(c, &audio->card.func); | |
785 | if (status) | |
786 | goto add_fail; | |
787 | ||
788 | INFO(c->cdev, "audio_buf_size %d, req_buf_size %d, req_count %d\n", | |
789 | audio_buf_size, req_buf_size, req_count); | |
790 | ||
791 | return status; | |
792 | ||
793 | add_fail: | |
feef1d95 | 794 | gaudio_cleanup(); |
c6994e6f BW |
795 | setup_fail: |
796 | kfree(audio); | |
797 | return status; | |
798 | } |