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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | UsbIo.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | USB I/O Abstraction Driver\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | \r | |
24 | #include "usbbus.h"\r | |
25 | \r | |
26 | //\r | |
27 | // USB I/O Support Function Prototypes\r | |
28 | //\r | |
29 | STATIC\r | |
30 | EFI_STATUS\r | |
31 | EFIAPI\r | |
32 | UsbControlTransfer (\r | |
33 | IN EFI_USB_IO_PROTOCOL *This,\r | |
34 | IN EFI_USB_DEVICE_REQUEST *Request,\r | |
35 | IN EFI_USB_DATA_DIRECTION Direction,\r | |
36 | IN UINT32 Timeout,\r | |
37 | IN OUT VOID *Data, OPTIONAL\r | |
38 | IN UINTN DataLength, OPTIONAL\r | |
39 | OUT UINT32 *Status\r | |
40 | );\r | |
41 | \r | |
42 | STATIC\r | |
43 | EFI_STATUS\r | |
44 | EFIAPI\r | |
45 | UsbBulkTransfer (\r | |
46 | IN EFI_USB_IO_PROTOCOL *This,\r | |
47 | IN UINT8 DeviceEndpoint,\r | |
48 | IN OUT VOID *Data,\r | |
49 | IN OUT UINTN *DataLength,\r | |
50 | IN UINTN Timeout,\r | |
51 | OUT UINT32 *Status\r | |
52 | );\r | |
53 | \r | |
54 | STATIC\r | |
55 | EFI_STATUS\r | |
56 | EFIAPI\r | |
57 | UsbAsyncInterruptTransfer (\r | |
58 | IN EFI_USB_IO_PROTOCOL * This,\r | |
59 | IN UINT8 DeviceEndpoint,\r | |
60 | IN BOOLEAN IsNewTransfer,\r | |
61 | IN UINTN PollingInterval, OPTIONAL\r | |
62 | IN UINTN DataLength, OPTIONAL\r | |
63 | IN EFI_ASYNC_USB_TRANSFER_CALLBACK InterruptCallBack, OPTIONAL\r | |
64 | IN VOID *Context OPTIONAL\r | |
65 | );\r | |
66 | \r | |
67 | STATIC\r | |
68 | EFI_STATUS\r | |
69 | EFIAPI\r | |
70 | UsbSyncInterruptTransfer (\r | |
71 | IN EFI_USB_IO_PROTOCOL *This,\r | |
72 | IN UINT8 DeviceEndpoint,\r | |
73 | IN OUT VOID *Data,\r | |
74 | IN OUT UINTN *DataLength,\r | |
75 | IN UINTN Timeout,\r | |
76 | OUT UINT32 *Status\r | |
77 | );\r | |
78 | \r | |
79 | STATIC\r | |
80 | EFI_STATUS\r | |
81 | EFIAPI\r | |
82 | UsbIsochronousTransfer (\r | |
83 | IN EFI_USB_IO_PROTOCOL *This,\r | |
84 | IN UINT8 DeviceEndpoint,\r | |
85 | IN OUT VOID *Data,\r | |
86 | IN UINTN DataLength,\r | |
87 | OUT UINT32 *Status\r | |
88 | );\r | |
89 | \r | |
90 | STATIC\r | |
91 | EFI_STATUS\r | |
92 | EFIAPI\r | |
93 | UsbAsyncIsochronousTransfer (\r | |
94 | IN EFI_USB_IO_PROTOCOL * This,\r | |
95 | IN UINT8 DeviceEndpoint,\r | |
96 | IN OUT VOID *Data,\r | |
97 | IN UINTN DataLength,\r | |
98 | IN EFI_ASYNC_USB_TRANSFER_CALLBACK IsochronousCallBack,\r | |
99 | IN VOID *Context OPTIONAL\r | |
100 | );\r | |
101 | \r | |
102 | extern\r | |
103 | EFI_STATUS\r | |
104 | EFIAPI\r | |
105 | UsbPortReset (\r | |
106 | IN EFI_USB_IO_PROTOCOL *This\r | |
107 | );\r | |
108 | \r | |
109 | STATIC\r | |
110 | EFI_STATUS\r | |
111 | EFIAPI\r | |
112 | UsbGetDeviceDescriptor (\r | |
113 | IN EFI_USB_IO_PROTOCOL *This,\r | |
114 | OUT EFI_USB_DEVICE_DESCRIPTOR *DeviceDescriptor\r | |
115 | );\r | |
116 | \r | |
117 | STATIC\r | |
118 | EFI_STATUS\r | |
119 | EFIAPI\r | |
120 | UsbGetActiveConfigDescriptor (\r | |
121 | IN EFI_USB_IO_PROTOCOL *This,\r | |
122 | OUT EFI_USB_CONFIG_DESCRIPTOR *ConfigurationDescriptor\r | |
123 | );\r | |
124 | \r | |
125 | STATIC\r | |
126 | EFI_STATUS\r | |
127 | EFIAPI\r | |
128 | UsbGetInterfaceDescriptor (\r | |
129 | IN EFI_USB_IO_PROTOCOL *This,\r | |
130 | OUT EFI_USB_INTERFACE_DESCRIPTOR *InterfaceDescriptor\r | |
131 | );\r | |
132 | \r | |
133 | STATIC\r | |
134 | EFI_STATUS\r | |
135 | EFIAPI\r | |
136 | UsbGetEndpointDescriptor (\r | |
137 | IN EFI_USB_IO_PROTOCOL *This,\r | |
138 | IN UINT8 EndpointIndex,\r | |
139 | OUT EFI_USB_ENDPOINT_DESCRIPTOR *EndpointDescriptor\r | |
140 | );\r | |
141 | \r | |
142 | STATIC\r | |
143 | EFI_STATUS\r | |
144 | EFIAPI\r | |
145 | UsbGetStringDescriptor (\r | |
146 | IN EFI_USB_IO_PROTOCOL *This,\r | |
147 | IN UINT16 LangID,\r | |
148 | IN UINT8 StringIndex,\r | |
149 | OUT CHAR16 **String\r | |
150 | );\r | |
151 | \r | |
152 | STATIC\r | |
153 | EFI_STATUS\r | |
154 | EFIAPI\r | |
155 | UsbGetSupportedLanguages (\r | |
156 | IN EFI_USB_IO_PROTOCOL *This,\r | |
157 | OUT UINT16 **LangIDTable,\r | |
158 | OUT UINT16 *TableSize\r | |
159 | );\r | |
160 | \r | |
161 | //\r | |
162 | // USB I/O Interface structure\r | |
163 | //\r | |
164 | STATIC EFI_USB_IO_PROTOCOL UsbIoInterface = {\r | |
165 | UsbControlTransfer,\r | |
166 | UsbBulkTransfer,\r | |
167 | UsbAsyncInterruptTransfer,\r | |
168 | UsbSyncInterruptTransfer,\r | |
169 | UsbIsochronousTransfer,\r | |
170 | UsbAsyncIsochronousTransfer,\r | |
171 | UsbGetDeviceDescriptor,\r | |
172 | UsbGetActiveConfigDescriptor,\r | |
173 | UsbGetInterfaceDescriptor,\r | |
174 | UsbGetEndpointDescriptor,\r | |
175 | UsbGetStringDescriptor,\r | |
176 | UsbGetSupportedLanguages,\r | |
177 | UsbPortReset\r | |
178 | };\r | |
179 | \r | |
180 | VOID\r | |
181 | InitializeUsbIoInstance (\r | |
182 | IN USB_IO_CONTROLLER_DEVICE *UsbIoController\r | |
183 | )\r | |
184 | /*++\r | |
185 | \r | |
186 | Routine Description:\r | |
187 | \r | |
188 | Initialize the instance of UsbIo controller\r | |
189 | \r | |
190 | Arguments:\r | |
191 | \r | |
192 | UsbIoController - A pointer to controller structure of UsbIo\r | |
193 | \r | |
194 | Returns:\r | |
195 | \r | |
196 | --*/\r | |
197 | {\r | |
198 | //\r | |
199 | // Copy EFI_USB_IO protocol instance\r | |
200 | //\r | |
201 | CopyMem (\r | |
202 | &UsbIoController->UsbIo,\r | |
203 | &UsbIoInterface,\r | |
204 | sizeof (EFI_USB_IO_PROTOCOL)\r | |
205 | );\r | |
206 | }\r | |
207 | //\r | |
208 | // Implementation\r | |
209 | //\r | |
210 | STATIC\r | |
211 | EFI_STATUS\r | |
212 | EFIAPI\r | |
213 | UsbControlTransfer (\r | |
214 | IN EFI_USB_IO_PROTOCOL *This,\r | |
215 | IN EFI_USB_DEVICE_REQUEST *Request,\r | |
216 | IN EFI_USB_DATA_DIRECTION Direction,\r | |
217 | IN UINT32 Timeout,\r | |
218 | IN OUT VOID *Data, OPTIONAL\r | |
219 | IN UINTN DataLength, OPTIONAL\r | |
220 | OUT UINT32 *Status\r | |
221 | )\r | |
222 | /*++\r | |
223 | \r | |
224 | Routine Description:\r | |
225 | This function is used to manage a USB device with a control transfer pipe.\r | |
226 | \r | |
227 | Arguments:\r | |
228 | This - Indicates calling context.\r | |
229 | Request - A pointer to the USB device request that will be sent to\r | |
230 | the USB device.\r | |
231 | Direction - Indicates the data direction.\r | |
232 | Data - A pointer to the buffer of data that will be transmitted\r | |
233 | to USB device or received from USB device.\r | |
234 | Timeout - Indicates the transfer should be completed within this time\r | |
235 | frame.\r | |
236 | DataLength - The size, in bytes, of the data buffer specified by Data.\r | |
237 | Status - A pointer to the result of the USB transfer.\r | |
238 | \r | |
239 | Returns:\r | |
240 | EFI_SUCCESS\r | |
241 | EFI_INVALID_PARAMETER\r | |
242 | EFI_OUT_OF_RESOURCES\r | |
243 | EFI_TIMEOUT\r | |
244 | EFI_DEVICE_ERROR\r | |
245 | \r | |
246 | --*/\r | |
247 | {\r | |
248 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
249 | \r | |
250 | EFI_STATUS RetStatus;\r | |
251 | USB_IO_DEVICE *UsbIoDev;\r | |
252 | UINT8 MaxPacketLength;\r | |
253 | UINT32 TransferResult;\r | |
254 | BOOLEAN Disconnected;\r | |
255 | //\r | |
256 | // Parameters Checking\r | |
257 | //\r | |
258 | if (Status == NULL) {\r | |
259 | return EFI_INVALID_PARAMETER;\r | |
260 | }\r | |
261 | \r | |
262 | //\r | |
263 | // leave the HostController's ControlTransfer\r | |
264 | // to perform other parameters checking\r | |
265 | //\r | |
266 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
267 | UsbIoDev = UsbIoController->UsbDevice;\r | |
268 | \r | |
269 | MaxPacketLength = UsbIoDev->DeviceDescriptor.MaxPacketSize0;\r | |
270 | \r | |
271 | \r | |
272 | if (Request->Request == USB_DEV_CLEAR_FEATURE && \r | |
273 | Request->RequestType == 0x02 && \r | |
274 | Request->Value == EfiUsbEndpointHalt) {\r | |
275 | //\r | |
276 | //Reduce the remove delay time for system response\r | |
277 | //\r | |
278 | IsDeviceDisconnected (UsbIoController, &Disconnected);\r | |
279 | if (!EFI_ERROR (Status) && Disconnected == TRUE) {\r | |
280 | DEBUG ((gUSBErrorLevel, "Device is disconnected when trying reset\n"));\r | |
281 | return EFI_DEVICE_ERROR;\r | |
282 | }\r | |
283 | }\r | |
284 | //\r | |
285 | // using HostController's ControlTransfer to complete the request\r | |
286 | //\r | |
287 | RetStatus = UsbVirtualHcControlTransfer (\r | |
288 | UsbIoDev->BusController,\r | |
289 | UsbIoDev->DeviceAddress,\r | |
290 | UsbIoDev->DeviceSpeed,\r | |
291 | MaxPacketLength,\r | |
292 | Request,\r | |
293 | Direction,\r | |
294 | Data,\r | |
295 | &DataLength,\r | |
296 | (UINTN) Timeout,\r | |
297 | UsbIoDev->Translator,\r | |
298 | &TransferResult\r | |
299 | );\r | |
300 | \r | |
301 | *Status = TransferResult;\r | |
302 | \r | |
303 | if (Request->Request == USB_DEV_CLEAR_FEATURE && \r | |
304 | Request->RequestType == 0x02 && \r | |
305 | Request->Value == EfiUsbEndpointHalt) {\r | |
306 | //\r | |
307 | // This is a UsbClearEndpointHalt request\r | |
308 | // Need to clear data toggle\r | |
309 | // Request.Index == EndpointAddress\r | |
310 | //\r | |
311 | if (!EFI_ERROR (RetStatus) && TransferResult == EFI_USB_NOERROR) {\r | |
312 | SetDataToggleBit (\r | |
313 | This,\r | |
314 | (UINT8) Request->Index,\r | |
315 | 0\r | |
316 | );\r | |
317 | }\r | |
318 | }\r | |
319 | return RetStatus;\r | |
320 | }\r | |
321 | \r | |
322 | STATIC\r | |
323 | EFI_STATUS\r | |
324 | EFIAPI\r | |
325 | UsbBulkTransfer (\r | |
326 | IN EFI_USB_IO_PROTOCOL *This,\r | |
327 | IN UINT8 DeviceEndpoint,\r | |
328 | IN OUT VOID *Data,\r | |
329 | IN OUT UINTN *DataLength,\r | |
330 | IN UINTN Timeout,\r | |
331 | OUT UINT32 *Status\r | |
332 | )\r | |
333 | /*++\r | |
334 | \r | |
335 | Routine Description:\r | |
336 | This function is used to manage a USB device with the bulk transfer pipe.\r | |
337 | \r | |
338 | Arguments:\r | |
339 | This - Indicates calling context.\r | |
340 | DeviceEndpoint - The destination USB device endpoint to which the device\r | |
341 | request is being sent.\r | |
342 | Data - A pointer to the buffer of data that will be transmitted\r | |
343 | to USB device or received from USB device.\r | |
344 | DataLength - On input, the size, in bytes, of the data buffer\r | |
345 | specified by Data. On output, the number of bytes that\r | |
346 | were actually transferred.\r | |
347 | Timeout - Indicates the transfer should be completed within this\r | |
348 | time frame.\r | |
349 | Status - This parameter indicates the USB transfer status.\r | |
350 | \r | |
351 | Returns:\r | |
352 | EFI_SUCCESS\r | |
353 | EFI_INVALID_PARAMETER\r | |
354 | EFI_OUT_OF_RESOURCES\r | |
355 | EFI_TIMEOUT\r | |
356 | EFI_DEVICE_ERROR\r | |
357 | \r | |
358 | --*/\r | |
359 | {\r | |
360 | USB_IO_DEVICE *UsbIoDev;\r | |
361 | UINTN MaxPacketLength;\r | |
362 | UINT8 DataToggle;\r | |
363 | UINT8 OldToggle;\r | |
364 | EFI_STATUS RetStatus;\r | |
365 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
366 | ENDPOINT_DESC_LIST_ENTRY *EndPointListEntry;\r | |
367 | UINT8 DataBuffersNumber;\r | |
368 | UINT32 TransferResult;\r | |
369 | \r | |
370 | DataBuffersNumber = 1;\r | |
371 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
372 | UsbIoDev = UsbIoController->UsbDevice;\r | |
373 | \r | |
374 | //\r | |
375 | // Parameters Checking\r | |
376 | //\r | |
377 | if ((DeviceEndpoint & 0x7F) == 0) {\r | |
378 | return EFI_INVALID_PARAMETER;\r | |
379 | }\r | |
380 | \r | |
381 | if ((DeviceEndpoint & 0x7F) > 15) {\r | |
382 | return EFI_INVALID_PARAMETER;\r | |
383 | }\r | |
384 | \r | |
385 | if (Status == NULL) {\r | |
386 | return EFI_INVALID_PARAMETER;\r | |
387 | }\r | |
388 | \r | |
389 | EndPointListEntry = FindEndPointListEntry (\r | |
390 | This,\r | |
391 | DeviceEndpoint\r | |
392 | );\r | |
393 | \r | |
394 | if (EndPointListEntry == NULL) {\r | |
395 | return EFI_INVALID_PARAMETER;\r | |
396 | }\r | |
397 | \r | |
398 | if ((EndPointListEntry->EndpointDescriptor.Attributes & 0x03) != 0x02) {\r | |
399 | return EFI_INVALID_PARAMETER;\r | |
400 | }\r | |
401 | \r | |
402 | //\r | |
403 | // leave the HostController's BulkTransfer\r | |
404 | // to perform other parameters checking\r | |
405 | //\r | |
406 | GetDeviceEndPointMaxPacketLength (\r | |
407 | This,\r | |
408 | DeviceEndpoint,\r | |
409 | &MaxPacketLength\r | |
410 | );\r | |
411 | \r | |
412 | GetDataToggleBit (\r | |
413 | This,\r | |
414 | DeviceEndpoint,\r | |
415 | &DataToggle\r | |
416 | );\r | |
417 | \r | |
418 | OldToggle = DataToggle;\r | |
419 | \r | |
420 | //\r | |
421 | // using HostController's BulkTransfer to complete the request\r | |
422 | //\r | |
423 | RetStatus = UsbVirtualHcBulkTransfer (\r | |
424 | UsbIoDev->BusController,\r | |
425 | UsbIoDev->DeviceAddress,\r | |
426 | DeviceEndpoint,\r | |
427 | UsbIoDev->DeviceSpeed,\r | |
428 | MaxPacketLength,\r | |
429 | DataBuffersNumber,\r | |
430 | &Data,\r | |
431 | DataLength,\r | |
432 | &DataToggle,\r | |
433 | Timeout,\r | |
434 | UsbIoDev->Translator,\r | |
435 | &TransferResult\r | |
436 | );\r | |
437 | \r | |
438 | if (OldToggle != DataToggle) {\r | |
439 | //\r | |
440 | // Write the toggle back\r | |
441 | //\r | |
442 | SetDataToggleBit (\r | |
443 | This,\r | |
444 | DeviceEndpoint,\r | |
445 | DataToggle\r | |
446 | );\r | |
447 | }\r | |
448 | \r | |
449 | *Status = TransferResult;\r | |
450 | \r | |
451 | return RetStatus;\r | |
452 | }\r | |
453 | \r | |
454 | STATIC\r | |
455 | EFI_STATUS\r | |
456 | EFIAPI\r | |
457 | UsbSyncInterruptTransfer (\r | |
458 | IN EFI_USB_IO_PROTOCOL *This,\r | |
459 | IN UINT8 DeviceEndpoint,\r | |
460 | IN OUT VOID *Data,\r | |
461 | IN OUT UINTN *DataLength,\r | |
462 | IN UINTN Timeout,\r | |
463 | OUT UINT32 *Status\r | |
464 | )\r | |
465 | /*++\r | |
466 | \r | |
467 | Routine Description:\r | |
468 | Usb Sync Interrupt Transfer\r | |
469 | \r | |
470 | Arguments:\r | |
471 | This - Indicates calling context.\r | |
472 | DeviceEndpoint - The destination USB device endpoint to which the device\r | |
473 | request is being sent.\r | |
474 | Data - A pointer to the buffer of data that will be transmitted\r | |
475 | to USB device or received from USB device.\r | |
476 | DataLength - On input, the size, in bytes, of the data buffer\r | |
477 | specified by Data. On output, the number of bytes that\r | |
478 | were actually transferred.\r | |
479 | Timeout - Indicates the transfer should be completed within this\r | |
480 | time frame.\r | |
481 | Status - This parameter indicates the USB transfer status.\r | |
482 | \r | |
483 | Returns:\r | |
484 | EFI_SUCCESS\r | |
485 | EFI_INVALID_PARAMETER\r | |
486 | EFI_OUT_OF_RESOURCES\r | |
487 | EFI_TIMEOUT\r | |
488 | EFI_DEVICE_ERROR\r | |
489 | \r | |
490 | --*/\r | |
491 | {\r | |
492 | USB_IO_DEVICE *UsbIoDev;\r | |
493 | UINTN MaxPacketLength;\r | |
494 | UINT8 DataToggle;\r | |
495 | UINT8 OldToggle;\r | |
496 | EFI_STATUS RetStatus;\r | |
497 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
498 | ENDPOINT_DESC_LIST_ENTRY *EndPointListEntry;\r | |
499 | \r | |
500 | //\r | |
501 | // Parameters Checking\r | |
502 | //\r | |
503 | if ((DeviceEndpoint & 0x7F) == 0) {\r | |
504 | return EFI_INVALID_PARAMETER;\r | |
505 | }\r | |
506 | \r | |
507 | if ((DeviceEndpoint & 0x7F) > 15) {\r | |
508 | return EFI_INVALID_PARAMETER;\r | |
509 | }\r | |
510 | \r | |
511 | if (Status == NULL) {\r | |
512 | return EFI_INVALID_PARAMETER;\r | |
513 | }\r | |
514 | \r | |
515 | EndPointListEntry = FindEndPointListEntry (\r | |
516 | This,\r | |
517 | DeviceEndpoint\r | |
518 | );\r | |
519 | \r | |
520 | if (EndPointListEntry == NULL) {\r | |
521 | return EFI_INVALID_PARAMETER;\r | |
522 | }\r | |
523 | \r | |
524 | if ((EndPointListEntry->EndpointDescriptor.Attributes & 0x03) != 0x03) {\r | |
525 | return EFI_INVALID_PARAMETER;\r | |
526 | }\r | |
527 | \r | |
528 | //\r | |
529 | // leave the HostController's SyncInterruptTransfer\r | |
530 | // to perform other parameters checking\r | |
531 | //\r | |
532 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
533 | UsbIoDev = UsbIoController->UsbDevice;\r | |
534 | GetDeviceEndPointMaxPacketLength (\r | |
535 | This,\r | |
536 | DeviceEndpoint,\r | |
537 | &MaxPacketLength\r | |
538 | );\r | |
539 | \r | |
540 | GetDataToggleBit (\r | |
541 | This,\r | |
542 | DeviceEndpoint,\r | |
543 | &DataToggle\r | |
544 | );\r | |
545 | \r | |
546 | OldToggle = DataToggle;\r | |
547 | //\r | |
548 | // using HostController's SyncInterruptTransfer to complete the request\r | |
549 | //\r | |
550 | RetStatus = UsbVirtualHcSyncInterruptTransfer (\r | |
551 | UsbIoDev->BusController,\r | |
552 | UsbIoDev->DeviceAddress,\r | |
553 | DeviceEndpoint,\r | |
554 | UsbIoDev->DeviceSpeed,\r | |
555 | MaxPacketLength,\r | |
556 | Data,\r | |
557 | DataLength,\r | |
558 | &DataToggle,\r | |
559 | Timeout,\r | |
560 | UsbIoDev->Translator,\r | |
561 | Status\r | |
562 | );\r | |
563 | \r | |
564 | if (OldToggle != DataToggle) {\r | |
565 | //\r | |
566 | // Write the toggle back\r | |
567 | //\r | |
568 | SetDataToggleBit (\r | |
569 | This,\r | |
570 | DeviceEndpoint,\r | |
571 | DataToggle\r | |
572 | );\r | |
573 | }\r | |
574 | \r | |
575 | return RetStatus;\r | |
576 | }\r | |
577 | \r | |
578 | STATIC\r | |
579 | EFI_STATUS\r | |
580 | EFIAPI\r | |
581 | UsbAsyncInterruptTransfer (\r | |
582 | IN EFI_USB_IO_PROTOCOL *This,\r | |
583 | IN UINT8 DeviceEndpoint,\r | |
584 | IN BOOLEAN IsNewTransfer,\r | |
585 | IN UINTN PollingInterval, OPTIONAL\r | |
586 | IN UINTN DataLength, OPTIONAL\r | |
587 | IN EFI_ASYNC_USB_TRANSFER_CALLBACK InterruptCallBack, OPTIONAL\r | |
588 | IN VOID *Context OPTIONAL\r | |
589 | )\r | |
590 | /*++\r | |
591 | \r | |
592 | Routine Description:\r | |
593 | Usb Async Interrput Transfer\r | |
594 | \r | |
595 | Arguments:\r | |
596 | This - Indicates calling context.\r | |
597 | DeviceEndpoint - The destination USB device endpoint to which the\r | |
598 | device request is being sent.\r | |
599 | IsNewTransfer - If TRUE, a new transfer will be submitted to USB\r | |
600 | controller. If FALSE, the interrupt transfer is\r | |
601 | deleted from the device's interrupt transfer queue.\r | |
602 | PollingInterval - Indicates the periodic rate, in milliseconds, that\r | |
603 | the transfer is to be executed.\r | |
604 | DataLength - Specifies the length, in bytes, of the data to be\r | |
605 | received from the USB device.\r | |
606 | InterruptCallBack - The Callback function. This function is called if\r | |
607 | the asynchronous interrupt transfer is completed.\r | |
608 | Context - Passed to InterruptCallback \r | |
609 | Returns:\r | |
610 | EFI_SUCCESS\r | |
611 | EFI_INVALID_PARAMETER\r | |
612 | EFI_OUT_OF_RESOURCES\r | |
613 | \r | |
614 | --*/\r | |
615 | {\r | |
616 | USB_IO_DEVICE *UsbIoDev;\r | |
617 | UINTN MaxPacketLength;\r | |
618 | UINT8 DataToggle;\r | |
619 | EFI_STATUS RetStatus;\r | |
620 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
621 | ENDPOINT_DESC_LIST_ENTRY *EndpointListEntry;\r | |
622 | \r | |
623 | //\r | |
624 | // Check endpoint\r | |
625 | //\r | |
626 | if ((DeviceEndpoint & 0x7F) == 0) {\r | |
627 | return EFI_INVALID_PARAMETER;\r | |
628 | }\r | |
629 | \r | |
630 | if ((DeviceEndpoint & 0x7F) > 15) {\r | |
631 | return EFI_INVALID_PARAMETER;\r | |
632 | }\r | |
633 | \r | |
634 | EndpointListEntry = FindEndPointListEntry (\r | |
635 | This,\r | |
636 | DeviceEndpoint\r | |
637 | );\r | |
638 | \r | |
639 | if (EndpointListEntry == NULL) {\r | |
640 | return EFI_INVALID_PARAMETER;\r | |
641 | }\r | |
642 | \r | |
643 | if ((EndpointListEntry->EndpointDescriptor.Attributes & 0x03) != 0x03) {\r | |
644 | return EFI_INVALID_PARAMETER;\r | |
645 | }\r | |
646 | \r | |
647 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
648 | UsbIoDev = UsbIoController->UsbDevice;\r | |
649 | \r | |
650 | if (!IsNewTransfer) {\r | |
651 | //\r | |
652 | // Delete this transfer\r | |
653 | //\r | |
654 | UsbVirtualHcAsyncInterruptTransfer (\r | |
655 | UsbIoDev->BusController,\r | |
656 | UsbIoDev->DeviceAddress,\r | |
657 | DeviceEndpoint,\r | |
658 | UsbIoDev->DeviceSpeed,\r | |
659 | 0,\r | |
660 | FALSE,\r | |
661 | &DataToggle,\r | |
662 | PollingInterval,\r | |
663 | DataLength,\r | |
664 | UsbIoDev->Translator,\r | |
665 | NULL,\r | |
666 | NULL\r | |
667 | );\r | |
668 | \r | |
669 | //\r | |
670 | // We need to store the toggle value\r | |
671 | //\r | |
672 | SetDataToggleBit (\r | |
673 | This,\r | |
674 | DeviceEndpoint,\r | |
675 | DataToggle\r | |
676 | );\r | |
677 | \r | |
678 | return EFI_SUCCESS;\r | |
679 | }\r | |
680 | \r | |
681 | GetDeviceEndPointMaxPacketLength (\r | |
682 | This,\r | |
683 | DeviceEndpoint,\r | |
684 | &MaxPacketLength\r | |
685 | );\r | |
686 | \r | |
687 | GetDataToggleBit (\r | |
688 | This,\r | |
689 | DeviceEndpoint,\r | |
690 | &DataToggle\r | |
691 | );\r | |
692 | \r | |
693 | RetStatus = UsbVirtualHcAsyncInterruptTransfer (\r | |
694 | UsbIoDev->BusController,\r | |
695 | UsbIoDev->DeviceAddress,\r | |
696 | DeviceEndpoint,\r | |
697 | UsbIoDev->DeviceSpeed,\r | |
698 | MaxPacketLength,\r | |
699 | TRUE,\r | |
700 | &DataToggle,\r | |
701 | PollingInterval,\r | |
702 | DataLength,\r | |
703 | UsbIoDev->Translator,\r | |
704 | InterruptCallBack,\r | |
705 | Context\r | |
706 | );\r | |
707 | \r | |
708 | return RetStatus;\r | |
709 | }\r | |
710 | \r | |
711 | STATIC\r | |
712 | EFI_STATUS\r | |
713 | EFIAPI\r | |
714 | UsbIsochronousTransfer (\r | |
715 | IN EFI_USB_IO_PROTOCOL *This,\r | |
716 | IN UINT8 DeviceEndpoint,\r | |
717 | IN OUT VOID *Data,\r | |
718 | IN UINTN DataLength,\r | |
719 | OUT UINT32 *Status\r | |
720 | )\r | |
721 | /*++\r | |
722 | \r | |
723 | Routine Description:\r | |
724 | Usb Isochronous Transfer\r | |
725 | \r | |
726 | Arguments:\r | |
727 | This - Indicates calling context.\r | |
728 | DeviceEndpoint - The destination USB device endpoint to which the\r | |
729 | device request is being sent.\r | |
730 | Data - A pointer to the buffer of data that will be\r | |
731 | transmitted to USB device or received from USB device.\r | |
732 | DataLength - The size, in bytes, of the data buffer specified by\r | |
733 | Data.\r | |
734 | Status - This parameter indicates the USB transfer status.\r | |
735 | \r | |
736 | Returns:\r | |
737 | EFI_SUCCESS\r | |
738 | EFI_INVALID_PARAMETER\r | |
739 | EFI_OUT_OF_RESOURCES\r | |
740 | EFI_TIMEOUT\r | |
741 | EFI_DEVICE_ERROR\r | |
742 | EFI_UNSUPPORTED\r | |
743 | --*/\r | |
744 | {\r | |
745 | //\r | |
746 | // Currently we don't support this transfer\r | |
747 | //\r | |
748 | return EFI_UNSUPPORTED;\r | |
749 | }\r | |
750 | \r | |
751 | STATIC\r | |
752 | EFI_STATUS\r | |
753 | EFIAPI\r | |
754 | UsbAsyncIsochronousTransfer (\r | |
755 | IN EFI_USB_IO_PROTOCOL *This,\r | |
756 | IN UINT8 DeviceEndpoint,\r | |
757 | IN OUT VOID *Data,\r | |
758 | IN UINTN DataLength,\r | |
759 | IN EFI_ASYNC_USB_TRANSFER_CALLBACK IsochronousCallBack,\r | |
760 | IN VOID *Context OPTIONAL\r | |
761 | )\r | |
762 | /*++\r | |
763 | \r | |
764 | Routine Description:\r | |
765 | \r | |
766 | Usb Async Isochronous Transfer\r | |
767 | \r | |
768 | Arguments:\r | |
769 | \r | |
770 | This - EFI_USB_IO_PROTOCOL\r | |
771 | DeviceEndpoint - DeviceEndpoint number\r | |
772 | Data - Data to transfer\r | |
773 | DataLength - DataLength\r | |
774 | IsochronousCallBack - Isochronous CallBack function\r | |
775 | Context - Passed to IsochronousCallBack function\r | |
776 | Returns:\r | |
777 | \r | |
778 | EFI_UNSUPPORTED - Unsupported now\r | |
779 | \r | |
780 | --*/\r | |
781 | {\r | |
782 | //\r | |
783 | // Currently we don't support this transfer\r | |
784 | //\r | |
785 | return EFI_UNSUPPORTED;\r | |
786 | }\r | |
787 | //\r | |
788 | // Here is new definitions\r | |
789 | //\r | |
790 | STATIC\r | |
791 | EFI_STATUS\r | |
792 | EFIAPI\r | |
793 | UsbGetDeviceDescriptor (\r | |
794 | IN EFI_USB_IO_PROTOCOL *This,\r | |
795 | OUT EFI_USB_DEVICE_DESCRIPTOR *DeviceDescriptor\r | |
796 | )\r | |
797 | /*++\r | |
798 | \r | |
799 | Routine Description:\r | |
800 | Retrieves the USB Device Descriptor.\r | |
801 | \r | |
802 | Arguments:\r | |
803 | This - Indicates the calling context.\r | |
804 | DeviceDescriptor - A pointer to the caller allocated USB Device\r | |
805 | Descriptor.\r | |
806 | \r | |
807 | Returns:\r | |
808 | EFI_SUCCESS\r | |
809 | EFI_INVALID_PARAMETER\r | |
810 | EFI_NOT_FOUND\r | |
811 | \r | |
812 | --*/\r | |
813 | {\r | |
814 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
815 | USB_IO_DEVICE *UsbIoDev;\r | |
816 | \r | |
817 | //\r | |
818 | // This function just wrapps UsbGetDeviceDescriptor.\r | |
819 | //\r | |
820 | \r | |
821 | if (DeviceDescriptor == NULL) {\r | |
822 | return EFI_INVALID_PARAMETER;\r | |
823 | }\r | |
824 | \r | |
825 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
826 | UsbIoDev = UsbIoController->UsbDevice;\r | |
827 | \r | |
828 | if (!UsbIoDev->IsConfigured) {\r | |
829 | return EFI_NOT_FOUND;\r | |
830 | }\r | |
831 | \r | |
832 | CopyMem (\r | |
833 | DeviceDescriptor,\r | |
834 | &UsbIoDev->DeviceDescriptor,\r | |
835 | sizeof (EFI_USB_DEVICE_DESCRIPTOR)\r | |
836 | );\r | |
837 | \r | |
838 | return EFI_SUCCESS;\r | |
839 | }\r | |
840 | \r | |
841 | STATIC\r | |
842 | EFI_STATUS\r | |
843 | EFIAPI\r | |
844 | UsbGetActiveConfigDescriptor (\r | |
845 | IN EFI_USB_IO_PROTOCOL *This,\r | |
846 | OUT EFI_USB_CONFIG_DESCRIPTOR *ConfigurationDescriptor\r | |
847 | )\r | |
848 | /*++\r | |
849 | \r | |
850 | Routine Description:\r | |
851 | Retrieves the current USB configuration Descriptor.\r | |
852 | \r | |
853 | Arguments:\r | |
854 | This - Indicates the calling context.\r | |
855 | ConfigurationDescriptor - A pointer to the caller allocated USB active\r | |
856 | Configuration Descriptor.\r | |
857 | \r | |
858 | Returns:\r | |
859 | EFI_SUCCESS\r | |
860 | EFI_INVALID_PARAMETER\r | |
861 | EFI_NOT_FOUND\r | |
862 | \r | |
863 | --*/\r | |
864 | {\r | |
865 | USB_IO_DEVICE *UsbIoDev;\r | |
866 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
867 | \r | |
868 | //\r | |
869 | // This function just wrapps UsbGetActiveConfigDescriptor.\r | |
870 | //\r | |
871 | if (ConfigurationDescriptor == NULL) {\r | |
872 | return EFI_INVALID_PARAMETER;\r | |
873 | }\r | |
874 | \r | |
875 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
876 | UsbIoDev = UsbIoController->UsbDevice;\r | |
877 | \r | |
878 | if (!UsbIoDev->IsConfigured) {\r | |
879 | return EFI_NOT_FOUND;\r | |
880 | }\r | |
881 | \r | |
882 | CopyMem (\r | |
883 | ConfigurationDescriptor,\r | |
884 | &(UsbIoDev->ActiveConfig->CongfigDescriptor),\r | |
885 | sizeof (EFI_USB_CONFIG_DESCRIPTOR)\r | |
886 | );\r | |
887 | \r | |
888 | return EFI_SUCCESS;\r | |
889 | }\r | |
890 | \r | |
891 | STATIC\r | |
892 | EFI_STATUS\r | |
893 | EFIAPI\r | |
894 | UsbGetInterfaceDescriptor (\r | |
895 | IN EFI_USB_IO_PROTOCOL *This,\r | |
896 | OUT EFI_USB_INTERFACE_DESCRIPTOR *InterfaceDescriptor\r | |
897 | )\r | |
898 | /*++\r | |
899 | \r | |
900 | Routine Description:\r | |
901 | Retrieves the interface Descriptor for that controller.\r | |
902 | \r | |
903 | Arguments:\r | |
904 | This - Indicates the calling context.\r | |
905 | InterfaceDescriptor - A pointer to the caller allocated USB interface\r | |
906 | Descriptor.\r | |
907 | \r | |
908 | Returns:\r | |
909 | EFI_SUCCESS\r | |
910 | EFI_INVALID_PARAMETER\r | |
911 | EFI_NOT_FOUND\r | |
912 | \r | |
913 | --*/\r | |
914 | {\r | |
915 | INTERFACE_DESC_LIST_ENTRY *InterfaceListEntry;\r | |
916 | \r | |
917 | if (InterfaceDescriptor == NULL) {\r | |
918 | return EFI_INVALID_PARAMETER;\r | |
919 | }\r | |
920 | \r | |
921 | InterfaceListEntry = FindInterfaceListEntry (This);\r | |
922 | \r | |
923 | if (InterfaceListEntry == NULL) {\r | |
924 | return EFI_NOT_FOUND;\r | |
925 | }\r | |
926 | \r | |
927 | CopyMem (\r | |
928 | InterfaceDescriptor,\r | |
929 | &(InterfaceListEntry->InterfaceDescriptor),\r | |
930 | sizeof (EFI_USB_INTERFACE_DESCRIPTOR)\r | |
931 | );\r | |
932 | \r | |
933 | return EFI_SUCCESS;\r | |
934 | }\r | |
935 | \r | |
936 | STATIC\r | |
937 | EFI_STATUS\r | |
938 | EFIAPI\r | |
939 | UsbGetEndpointDescriptor (\r | |
940 | IN EFI_USB_IO_PROTOCOL *This,\r | |
941 | IN UINT8 EndpointIndex,\r | |
942 | OUT EFI_USB_ENDPOINT_DESCRIPTOR *EndpointDescriptor\r | |
943 | )\r | |
944 | /*++\r | |
945 | \r | |
946 | Routine Description:\r | |
947 | Retrieves the endpoint Descriptor for a given endpoint.\r | |
948 | \r | |
949 | Arguments:\r | |
950 | This - Indicates the calling context.\r | |
951 | EndpointIndex - Indicates which endpoint descriptor to retrieve.\r | |
952 | The valid range is 0..15.\r | |
953 | EndpointDescriptor - A pointer to the caller allocated USB Endpoint\r | |
954 | Descriptor of a USB controller.\r | |
955 | \r | |
956 | Returns:\r | |
957 | EFI_SUCCESS - The endpoint descriptor was retrieved successfully.\r | |
958 | EFI_INVALID_PARAMETER - EndpointIndex is not valid.\r | |
959 | - EndpointDescriptor is NULL.\r | |
960 | EFI_NOT_FOUND - The endpoint descriptor cannot be found.\r | |
961 | The device may not be correctly configured.\r | |
962 | \r | |
963 | --*/\r | |
964 | {\r | |
965 | INTERFACE_DESC_LIST_ENTRY *InterfaceListEntry;\r | |
966 | LIST_ENTRY *EndpointListHead;\r | |
967 | ENDPOINT_DESC_LIST_ENTRY *EndpointListEntry;\r | |
968 | \r | |
969 | if (EndpointDescriptor == NULL) {\r | |
970 | return EFI_INVALID_PARAMETER;\r | |
971 | }\r | |
972 | \r | |
973 | if (EndpointIndex > 15) {\r | |
974 | return EFI_INVALID_PARAMETER;\r | |
975 | }\r | |
976 | \r | |
977 | InterfaceListEntry = FindInterfaceListEntry (This);\r | |
978 | \r | |
979 | if (InterfaceListEntry == NULL) {\r | |
980 | return EFI_NOT_FOUND;\r | |
981 | }\r | |
982 | \r | |
983 | EndpointListHead = (LIST_ENTRY *) (&InterfaceListEntry->EndpointDescListHead);\r | |
984 | EndpointListEntry = (ENDPOINT_DESC_LIST_ENTRY *) (EndpointListHead->ForwardLink);\r | |
985 | \r | |
986 | if (EndpointIndex >= InterfaceListEntry->InterfaceDescriptor.NumEndpoints) {\r | |
987 | return EFI_NOT_FOUND;\r | |
988 | }\r | |
989 | //\r | |
990 | // Loop all endpoint descriptor to get match one.\r | |
991 | //\r | |
992 | while (EndpointIndex != 0) {\r | |
993 | EndpointListEntry = (ENDPOINT_DESC_LIST_ENTRY *) (EndpointListEntry->Link.ForwardLink);\r | |
994 | EndpointIndex--;\r | |
995 | }\r | |
996 | \r | |
997 | CopyMem (\r | |
998 | EndpointDescriptor,\r | |
999 | &EndpointListEntry->EndpointDescriptor,\r | |
1000 | sizeof (EFI_USB_ENDPOINT_DESCRIPTOR)\r | |
1001 | );\r | |
1002 | \r | |
1003 | return EFI_SUCCESS;\r | |
1004 | }\r | |
1005 | \r | |
1006 | STATIC\r | |
1007 | EFI_STATUS\r | |
1008 | EFIAPI\r | |
1009 | UsbGetSupportedLanguages (\r | |
1010 | IN EFI_USB_IO_PROTOCOL *This,\r | |
1011 | OUT UINT16 **LangIDTable,\r | |
1012 | OUT UINT16 *TableSize\r | |
1013 | )\r | |
1014 | /*++\r | |
1015 | \r | |
1016 | Routine Description:\r | |
1017 | Get all the languages that the USB device supports\r | |
1018 | \r | |
1019 | Arguments:\r | |
1020 | This - Indicates the calling context.\r | |
1021 | LangIDTable - Language ID for the string the caller wants to get.\r | |
1022 | TableSize - The size, in bytes, of the table LangIDTable.\r | |
1023 | \r | |
1024 | Returns:\r | |
1025 | EFI_SUCCESS\r | |
1026 | EFI_NOT_FOUND\r | |
1027 | \r | |
1028 | --*/\r | |
1029 | {\r | |
1030 | USB_IO_DEVICE *UsbIoDev;\r | |
1031 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
1032 | UINTN Index;\r | |
1033 | BOOLEAN Found;\r | |
1034 | \r | |
1035 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
1036 | UsbIoDev = UsbIoController->UsbDevice;\r | |
1037 | \r | |
1038 | Found = FALSE;\r | |
1039 | Index = 0;\r | |
1040 | //\r | |
1041 | // Loop language table\r | |
1042 | //\r | |
1043 | while (UsbIoDev->LangID[Index]) {\r | |
1044 | Found = TRUE;\r | |
1045 | Index++;\r | |
1046 | }\r | |
1047 | \r | |
1048 | if (!Found) {\r | |
1049 | return EFI_NOT_FOUND;\r | |
1050 | }\r | |
1051 | \r | |
1052 | *LangIDTable = UsbIoDev->LangID;\r | |
1053 | *TableSize = (UINT16) Index;\r | |
1054 | \r | |
1055 | return EFI_SUCCESS;\r | |
1056 | }\r | |
1057 | \r | |
1058 | STATIC\r | |
1059 | EFI_STATUS\r | |
1060 | EFIAPI\r | |
1061 | UsbGetStringDescriptor (\r | |
1062 | IN EFI_USB_IO_PROTOCOL *This,\r | |
1063 | IN UINT16 LangID,\r | |
1064 | IN UINT8 StringIndex,\r | |
1065 | OUT CHAR16 **String\r | |
1066 | )\r | |
1067 | /*++\r | |
1068 | \r | |
1069 | Routine Description:\r | |
1070 | Get a given string descriptor\r | |
1071 | \r | |
1072 | Arguments:\r | |
1073 | This - Indicates the calling context.\r | |
1074 | LangID - The Language ID for the string being retrieved.\r | |
1075 | StringIndex - The ID of the string being retrieved.\r | |
1076 | String - A pointer to a buffer allocated by this function\r | |
1077 | with AllocatePool() to store the string. If this\r | |
1078 | function returns EFI_SUCCESS, it stores the string\r | |
1079 | the caller wants to get. The caller should release\r | |
1080 | the string buffer with FreePool() after the string\r | |
1081 | is not used any more.\r | |
1082 | Returns:\r | |
1083 | EFI_SUCCESS\r | |
1084 | EFI_NOT_FOUND\r | |
1085 | EFI_OUT_OF_RESOURCES\r | |
1086 | EFI_UNSUPPORTED\r | |
1087 | \r | |
1088 | --*/\r | |
1089 | {\r | |
1090 | UINT32 Status;\r | |
1091 | EFI_STATUS Result;\r | |
1092 | EFI_USB_STRING_DESCRIPTOR *StrDescriptor;\r | |
1093 | UINT8 *Buffer;\r | |
1094 | CHAR16 *UsbString;\r | |
1095 | UINT16 TempBuffer;\r | |
1096 | USB_IO_DEVICE *UsbIoDev;\r | |
1097 | UINT8 Index;\r | |
1098 | BOOLEAN Found;\r | |
1099 | USB_IO_CONTROLLER_DEVICE *UsbIoController;\r | |
1100 | \r | |
1101 | if (StringIndex == 0) {\r | |
1102 | return EFI_NOT_FOUND;\r | |
1103 | }\r | |
1104 | //\r | |
1105 | // Search LanguageID, check if it is supported by this device\r | |
1106 | //\r | |
1107 | if (LangID == 0) {\r | |
1108 | return EFI_NOT_FOUND;\r | |
1109 | }\r | |
1110 | \r | |
1111 | UsbIoController = USB_IO_CONTROLLER_DEVICE_FROM_USB_IO_THIS (This);\r | |
1112 | UsbIoDev = UsbIoController->UsbDevice;\r | |
1113 | \r | |
1114 | Found = FALSE;\r | |
1115 | Index = 0;\r | |
1116 | while (UsbIoDev->LangID[Index]) {\r | |
1117 | if (UsbIoDev->LangID[Index] == LangID) {\r | |
1118 | Found = TRUE;\r | |
1119 | break;\r | |
1120 | }\r | |
1121 | \r | |
1122 | Index++;\r | |
1123 | }\r | |
1124 | \r | |
1125 | if (!Found) {\r | |
1126 | return EFI_NOT_FOUND;\r | |
1127 | }\r | |
1128 | //\r | |
1129 | // Get String Length\r | |
1130 | //\r | |
1131 | Result = UsbGetString (\r | |
1132 | This,\r | |
1133 | LangID,\r | |
1134 | StringIndex,\r | |
1135 | &TempBuffer,\r | |
1136 | 2,\r | |
1137 | &Status\r | |
1138 | );\r | |
1139 | if (EFI_ERROR (Result)) {\r | |
1140 | return EFI_NOT_FOUND;\r | |
1141 | }\r | |
1142 | \r | |
1143 | StrDescriptor = (EFI_USB_STRING_DESCRIPTOR *) &TempBuffer;\r | |
1144 | \r | |
1145 | if (StrDescriptor->Length == 0) {\r | |
1146 | return EFI_UNSUPPORTED;\r | |
1147 | }\r | |
1148 | \r | |
1149 | Buffer = AllocateZeroPool (StrDescriptor->Length);\r | |
1150 | if (Buffer == NULL) {\r | |
1151 | return EFI_OUT_OF_RESOURCES;\r | |
1152 | }\r | |
1153 | \r | |
1154 | Result = UsbGetString (\r | |
1155 | This,\r | |
1156 | LangID,\r | |
1157 | StringIndex,\r | |
1158 | Buffer,\r | |
1159 | StrDescriptor->Length,\r | |
1160 | &Status\r | |
1161 | );\r | |
1162 | \r | |
1163 | if (EFI_ERROR (Result)) {\r | |
1164 | gBS->FreePool (Buffer);\r | |
1165 | return EFI_NOT_FOUND;\r | |
1166 | }\r | |
1167 | \r | |
1168 | StrDescriptor = (EFI_USB_STRING_DESCRIPTOR *) Buffer;\r | |
1169 | \r | |
1170 | //\r | |
1171 | // UsbString is a UNICODE string\r | |
1172 | //\r | |
1173 | UsbString = AllocateZeroPool (StrDescriptor->Length);\r | |
1174 | if (UsbString == NULL) {\r | |
1175 | gBS->FreePool (Buffer);\r | |
1176 | return EFI_OUT_OF_RESOURCES;\r | |
1177 | }\r | |
1178 | \r | |
1179 | CopyMem (\r | |
1180 | (VOID *) UsbString,\r | |
1181 | Buffer + 2,\r | |
1182 | StrDescriptor->Length - 2\r | |
1183 | );\r | |
1184 | \r | |
1185 | *String = UsbString;\r | |
1186 | \r | |
1187 | gBS->FreePool (Buffer);\r | |
1188 | \r | |
1189 | return EFI_SUCCESS;\r | |
1190 | }\r |