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1 | /** @file\r | |
2 | Implementation of the USB mass storage Bulk-Only Transport protocol,\r | |
3 | according to USB Mass Storage Class Bulk-Only Transport, Revision 1.0.\r | |
4 | \r | |
5 | Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include "UsbMassBoot.h"\r | |
17 | #include "UsbMassBot.h"\r | |
18 | \r | |
19 | //\r | |
20 | // Definition of USB BOT Transport Protocol\r | |
21 | //\r | |
22 | USB_MASS_TRANSPORT mUsbBotTransport = {\r | |
23 | USB_MASS_STORE_BOT,\r | |
24 | UsbBotInit,\r | |
25 | UsbBotExecCommand,\r | |
26 | UsbBotResetDevice,\r | |
27 | UsbBotGetMaxLun,\r | |
28 | UsbBotCleanUp\r | |
29 | };\r | |
30 | \r | |
31 | /**\r | |
32 | Initializes USB BOT protocol.\r | |
33 | \r | |
34 | This function initializes the USB mass storage class BOT protocol.\r | |
35 | It will save its context which is a USB_BOT_PROTOCOL structure\r | |
36 | in the Context if Context isn't NULL.\r | |
37 | \r | |
38 | @param UsbIo The USB I/O Protocol instance\r | |
39 | @param Context The buffer to save the context to\r | |
40 | \r | |
41 | @retval EFI_SUCCESS The device is successfully initialized.\r | |
42 | @retval EFI_UNSUPPORTED The transport protocol doesn't support the device.\r | |
43 | @retval Other The USB BOT initialization fails.\r | |
44 | \r | |
45 | **/\r | |
46 | EFI_STATUS\r | |
47 | UsbBotInit (\r | |
48 | IN EFI_USB_IO_PROTOCOL *UsbIo,\r | |
49 | OUT VOID **Context OPTIONAL\r | |
50 | )\r | |
51 | {\r | |
52 | USB_BOT_PROTOCOL *UsbBot;\r | |
53 | EFI_USB_INTERFACE_DESCRIPTOR *Interface;\r | |
54 | EFI_USB_ENDPOINT_DESCRIPTOR EndPoint;\r | |
55 | EFI_STATUS Status;\r | |
56 | UINT8 Index;\r | |
57 | \r | |
58 | //\r | |
59 | // Allocate the BOT context for USB_BOT_PROTOCOL and two endpoint descriptors.\r | |
60 | //\r | |
61 | UsbBot = AllocateZeroPool (sizeof (USB_BOT_PROTOCOL) + 2 * sizeof (EFI_USB_ENDPOINT_DESCRIPTOR));\r | |
62 | ASSERT (UsbBot != NULL);\r | |
63 | \r | |
64 | UsbBot->UsbIo = UsbIo;\r | |
65 | \r | |
66 | //\r | |
67 | // Get the interface descriptor and validate that it\r | |
68 | // is a USB Mass Storage BOT interface.\r | |
69 | //\r | |
70 | Status = UsbIo->UsbGetInterfaceDescriptor (UsbIo, &UsbBot->Interface);\r | |
71 | \r | |
72 | if (EFI_ERROR (Status)) {\r | |
73 | goto ON_ERROR;\r | |
74 | }\r | |
75 | \r | |
76 | Interface = &UsbBot->Interface;\r | |
77 | \r | |
78 | if (Interface->InterfaceProtocol != USB_MASS_STORE_BOT) {\r | |
79 | Status = EFI_UNSUPPORTED;\r | |
80 | goto ON_ERROR;\r | |
81 | }\r | |
82 | \r | |
83 | //\r | |
84 | // Locate and save the first bulk-in and bulk-out endpoint\r | |
85 | //\r | |
86 | for (Index = 0; Index < Interface->NumEndpoints; Index++) {\r | |
87 | Status = UsbIo->UsbGetEndpointDescriptor (UsbIo, Index, &EndPoint);\r | |
88 | \r | |
89 | if (EFI_ERROR (Status) || !USB_IS_BULK_ENDPOINT (EndPoint.Attributes)) {\r | |
90 | continue;\r | |
91 | }\r | |
92 | \r | |
93 | if (USB_IS_IN_ENDPOINT (EndPoint.EndpointAddress) &&\r | |
94 | (UsbBot->BulkInEndpoint == NULL)) {\r | |
95 | \r | |
96 | UsbBot->BulkInEndpoint = (EFI_USB_ENDPOINT_DESCRIPTOR *) (UsbBot + 1);\r | |
97 | CopyMem(UsbBot->BulkInEndpoint, &EndPoint, sizeof (EndPoint));\r | |
98 | }\r | |
99 | \r | |
100 | if (USB_IS_OUT_ENDPOINT (EndPoint.EndpointAddress) &&\r | |
101 | (UsbBot->BulkOutEndpoint == NULL)) {\r | |
102 | \r | |
103 | UsbBot->BulkOutEndpoint = (EFI_USB_ENDPOINT_DESCRIPTOR *) (UsbBot + 1) + 1;\r | |
104 | CopyMem (UsbBot->BulkOutEndpoint, &EndPoint, sizeof(EndPoint));\r | |
105 | }\r | |
106 | }\r | |
107 | \r | |
108 | //\r | |
109 | // If bulk-in or bulk-out endpoint is not found, report error.\r | |
110 | //\r | |
111 | if ((UsbBot->BulkInEndpoint == NULL) || (UsbBot->BulkOutEndpoint == NULL)) {\r | |
112 | Status = EFI_UNSUPPORTED;\r | |
113 | goto ON_ERROR;\r | |
114 | }\r | |
115 | \r | |
116 | //\r | |
117 | // The USB BOT protocol uses CBWTag to match the CBW and CSW.\r | |
118 | //\r | |
119 | UsbBot->CbwTag = 0x01;\r | |
120 | \r | |
121 | if (Context != NULL) {\r | |
122 | *Context = UsbBot;\r | |
123 | } else {\r | |
124 | FreePool (UsbBot);\r | |
125 | }\r | |
126 | \r | |
127 | return EFI_SUCCESS;\r | |
128 | \r | |
129 | ON_ERROR:\r | |
130 | FreePool (UsbBot);\r | |
131 | return Status;\r | |
132 | }\r | |
133 | \r | |
134 | /**\r | |
135 | Send the command to the device using Bulk-Out endpoint.\r | |
136 | \r | |
137 | This function sends the command to the device using Bulk-Out endpoint.\r | |
138 | BOT transfer is composed of three phases: Command, Data, and Status.\r | |
139 | This is the Command phase.\r | |
140 | \r | |
141 | @param UsbBot The USB BOT device\r | |
142 | @param Cmd The command to transfer to device\r | |
143 | @param CmdLen The length of the command\r | |
144 | @param DataDir The direction of the data\r | |
145 | @param TransLen The expected length of the data\r | |
146 | @param Lun The number of logic unit\r | |
147 | \r | |
148 | @retval EFI_SUCCESS The command is sent to the device.\r | |
149 | @retval EFI_NOT_READY The device return NAK to the transfer\r | |
150 | @retval Others Failed to send the command to device\r | |
151 | \r | |
152 | **/\r | |
153 | EFI_STATUS\r | |
154 | UsbBotSendCommand (\r | |
155 | IN USB_BOT_PROTOCOL *UsbBot,\r | |
156 | IN UINT8 *Cmd,\r | |
157 | IN UINT8 CmdLen,\r | |
158 | IN EFI_USB_DATA_DIRECTION DataDir,\r | |
159 | IN UINT32 TransLen,\r | |
160 | IN UINT8 Lun\r | |
161 | )\r | |
162 | {\r | |
163 | USB_BOT_CBW Cbw;\r | |
164 | EFI_STATUS Status;\r | |
165 | UINT32 Result;\r | |
166 | UINTN DataLen;\r | |
167 | UINTN Timeout;\r | |
168 | \r | |
169 | ASSERT ((CmdLen > 0) && (CmdLen <= USB_BOT_MAX_CMDLEN));\r | |
170 | \r | |
171 | //\r | |
172 | // Fill in the Command Block Wrapper.\r | |
173 | //\r | |
174 | Cbw.Signature = USB_BOT_CBW_SIGNATURE;\r | |
175 | Cbw.Tag = UsbBot->CbwTag;\r | |
176 | Cbw.DataLen = TransLen;\r | |
177 | Cbw.Flag = (UINT8) ((DataDir == EfiUsbDataIn) ? BIT7 : 0);\r | |
178 | Cbw.Lun = Lun;\r | |
179 | Cbw.CmdLen = CmdLen;\r | |
180 | \r | |
181 | ZeroMem (Cbw.CmdBlock, USB_BOT_MAX_CMDLEN);\r | |
182 | CopyMem (Cbw.CmdBlock, Cmd, CmdLen);\r | |
183 | \r | |
184 | Result = 0;\r | |
185 | DataLen = sizeof (USB_BOT_CBW);\r | |
186 | Timeout = USB_BOT_SEND_CBW_TIMEOUT / USB_MASS_1_MILLISECOND;\r | |
187 | \r | |
188 | //\r | |
189 | // Use USB I/O Protocol to send the Command Block Wrapper to the device.\r | |
190 | //\r | |
191 | Status = UsbBot->UsbIo->UsbBulkTransfer (\r | |
192 | UsbBot->UsbIo,\r | |
193 | UsbBot->BulkOutEndpoint->EndpointAddress,\r | |
194 | &Cbw,\r | |
195 | &DataLen,\r | |
196 | Timeout,\r | |
197 | &Result\r | |
198 | );\r | |
199 | if (EFI_ERROR (Status)) {\r | |
200 | if (USB_IS_ERROR (Result, EFI_USB_ERR_STALL) && DataDir == EfiUsbDataOut) {\r | |
201 | //\r | |
202 | // Respond to Bulk-Out endpoint stall with a Reset Recovery,\r | |
203 | // according to section 5.3.1 of USB Mass Storage Class Bulk-Only Transport Spec, v1.0.\r | |
204 | //\r | |
205 | UsbBotResetDevice (UsbBot, FALSE);\r | |
206 | } else if (USB_IS_ERROR (Result, EFI_USB_ERR_NAK)) {\r | |
207 | Status = EFI_NOT_READY;\r | |
208 | }\r | |
209 | }\r | |
210 | \r | |
211 | return Status;\r | |
212 | }\r | |
213 | \r | |
214 | \r | |
215 | /**\r | |
216 | Transfer the data between the device and host.\r | |
217 | \r | |
218 | This function transfers the data between the device and host.\r | |
219 | BOT transfer is composed of three phases: Command, Data, and Status.\r | |
220 | This is the Data phase.\r | |
221 | \r | |
222 | @param UsbBot The USB BOT device\r | |
223 | @param DataDir The direction of the data\r | |
224 | @param Data The buffer to hold data\r | |
225 | @param TransLen The expected length of the data\r | |
226 | @param Timeout The time to wait the command to complete\r | |
227 | \r | |
228 | @retval EFI_SUCCESS The data is transferred\r | |
229 | @retval EFI_SUCCESS No data to transfer\r | |
230 | @retval EFI_NOT_READY The device return NAK to the transfer\r | |
231 | @retval Others Failed to transfer data\r | |
232 | \r | |
233 | **/\r | |
234 | EFI_STATUS\r | |
235 | UsbBotDataTransfer (\r | |
236 | IN USB_BOT_PROTOCOL *UsbBot,\r | |
237 | IN EFI_USB_DATA_DIRECTION DataDir,\r | |
238 | IN OUT UINT8 *Data,\r | |
239 | IN OUT UINTN *TransLen,\r | |
240 | IN UINT32 Timeout\r | |
241 | )\r | |
242 | {\r | |
243 | EFI_USB_ENDPOINT_DESCRIPTOR *Endpoint;\r | |
244 | EFI_STATUS Status;\r | |
245 | UINT32 Result;\r | |
246 | \r | |
247 | //\r | |
248 | // If no data to transfer, just return EFI_SUCCESS.\r | |
249 | //\r | |
250 | if ((DataDir == EfiUsbNoData) || (*TransLen == 0)) {\r | |
251 | return EFI_SUCCESS;\r | |
252 | }\r | |
253 | \r | |
254 | //\r | |
255 | // Select the endpoint then issue the transfer\r | |
256 | //\r | |
257 | if (DataDir == EfiUsbDataIn) {\r | |
258 | Endpoint = UsbBot->BulkInEndpoint;\r | |
259 | } else {\r | |
260 | Endpoint = UsbBot->BulkOutEndpoint;\r | |
261 | }\r | |
262 | \r | |
263 | Result = 0;\r | |
264 | Timeout = Timeout / USB_MASS_1_MILLISECOND;\r | |
265 | \r | |
266 | Status = UsbBot->UsbIo->UsbBulkTransfer (\r | |
267 | UsbBot->UsbIo,\r | |
268 | Endpoint->EndpointAddress,\r | |
269 | Data,\r | |
270 | TransLen,\r | |
271 | Timeout,\r | |
272 | &Result\r | |
273 | );\r | |
274 | if (EFI_ERROR (Status)) {\r | |
275 | if (USB_IS_ERROR (Result, EFI_USB_ERR_STALL)) {\r | |
276 | DEBUG ((EFI_D_INFO, "UsbBotDataTransfer: (%r)\n", Status)); \r | |
277 | DEBUG ((EFI_D_INFO, "UsbBotDataTransfer: DataIn Stall\n"));\r | |
278 | UsbClearEndpointStall (UsbBot->UsbIo, Endpoint->EndpointAddress);\r | |
279 | } else if (USB_IS_ERROR (Result, EFI_USB_ERR_NAK)) {\r | |
280 | Status = EFI_NOT_READY;\r | |
281 | } else {\r | |
282 | DEBUG ((EFI_D_ERROR, "UsbBotDataTransfer: (%r)\n", Status));\r | |
283 | }\r | |
284 | if(Status == EFI_TIMEOUT){\r | |
285 | UsbBotResetDevice(UsbBot, FALSE);\r | |
286 | }\r | |
287 | }\r | |
288 | \r | |
289 | return Status;\r | |
290 | }\r | |
291 | \r | |
292 | \r | |
293 | /**\r | |
294 | Get the command execution status from device.\r | |
295 | \r | |
296 | This function gets the command execution status from device.\r | |
297 | BOT transfer is composed of three phases: Command, Data, and Status.\r | |
298 | This is the Status phase.\r | |
299 | \r | |
300 | This function returns the transfer status of the BOT's CSW status,\r | |
301 | and returns the high level command execution result in Result. So\r | |
302 | even if EFI_SUCCESS is returned, the command may still have failed.\r | |
303 | \r | |
304 | @param UsbBot The USB BOT device.\r | |
305 | @param TransLen The expected length of the data.\r | |
306 | @param CmdStatus The result of the command execution.\r | |
307 | \r | |
308 | @retval EFI_SUCCESS Command execute result is retrieved and in the Result.\r | |
309 | @retval Other Error occurred when trying to get status.\r | |
310 | \r | |
311 | **/\r | |
312 | EFI_STATUS\r | |
313 | UsbBotGetStatus (\r | |
314 | IN USB_BOT_PROTOCOL *UsbBot,\r | |
315 | IN UINT32 TransLen,\r | |
316 | OUT UINT8 *CmdStatus\r | |
317 | )\r | |
318 | {\r | |
319 | USB_BOT_CSW Csw;\r | |
320 | UINTN Len;\r | |
321 | UINT8 Endpoint;\r | |
322 | EFI_STATUS Status;\r | |
323 | UINT32 Result;\r | |
324 | EFI_USB_IO_PROTOCOL *UsbIo;\r | |
325 | UINT32 Index;\r | |
326 | UINTN Timeout;\r | |
327 | \r | |
328 | *CmdStatus = USB_BOT_COMMAND_ERROR;\r | |
329 | Status = EFI_DEVICE_ERROR;\r | |
330 | Endpoint = UsbBot->BulkInEndpoint->EndpointAddress;\r | |
331 | UsbIo = UsbBot->UsbIo;\r | |
332 | Timeout = USB_BOT_RECV_CSW_TIMEOUT / USB_MASS_1_MILLISECOND;\r | |
333 | \r | |
334 | for (Index = 0; Index < USB_BOT_RECV_CSW_RETRY; Index++) {\r | |
335 | //\r | |
336 | // Attemp to the read Command Status Wrapper from bulk in endpoint\r | |
337 | //\r | |
338 | ZeroMem (&Csw, sizeof (USB_BOT_CSW));\r | |
339 | Result = 0;\r | |
340 | Len = sizeof (USB_BOT_CSW);\r | |
341 | Status = UsbIo->UsbBulkTransfer (\r | |
342 | UsbIo,\r | |
343 | Endpoint,\r | |
344 | &Csw,\r | |
345 | &Len,\r | |
346 | Timeout,\r | |
347 | &Result\r | |
348 | );\r | |
349 | if (EFI_ERROR(Status)) {\r | |
350 | if (USB_IS_ERROR (Result, EFI_USB_ERR_STALL)) {\r | |
351 | UsbClearEndpointStall (UsbIo, Endpoint);\r | |
352 | }\r | |
353 | continue;\r | |
354 | }\r | |
355 | \r | |
356 | if (Csw.Signature != USB_BOT_CSW_SIGNATURE) {\r | |
357 | //\r | |
358 | // CSW is invalid, so perform reset recovery\r | |
359 | //\r | |
360 | Status = UsbBotResetDevice (UsbBot, FALSE);\r | |
361 | } else if (Csw.CmdStatus == USB_BOT_COMMAND_ERROR) {\r | |
362 | //\r | |
363 | // Respond phase error also needs reset recovery\r | |
364 | //\r | |
365 | Status = UsbBotResetDevice (UsbBot, FALSE);\r | |
366 | } else {\r | |
367 | *CmdStatus = Csw.CmdStatus;\r | |
368 | break;\r | |
369 | }\r | |
370 | }\r | |
371 | //\r | |
372 | //The tag is increased even if there is an error.\r | |
373 | //\r | |
374 | UsbBot->CbwTag++;\r | |
375 | \r | |
376 | return Status;\r | |
377 | }\r | |
378 | \r | |
379 | \r | |
380 | /**\r | |
381 | Call the USB Mass Storage Class BOT protocol to issue\r | |
382 | the command/data/status circle to execute the commands.\r | |
383 | \r | |
384 | @param Context The context of the BOT protocol, that is,\r | |
385 | USB_BOT_PROTOCOL\r | |
386 | @param Cmd The high level command\r | |
387 | @param CmdLen The command length\r | |
388 | @param DataDir The direction of the data transfer\r | |
389 | @param Data The buffer to hold data\r | |
390 | @param DataLen The length of the data\r | |
391 | @param Lun The number of logic unit\r | |
392 | @param Timeout The time to wait command\r | |
393 | @param CmdStatus The result of high level command execution\r | |
394 | \r | |
395 | @retval EFI_SUCCESS The command is executed successfully.\r | |
396 | @retval Other Failed to excute command\r | |
397 | \r | |
398 | **/\r | |
399 | EFI_STATUS\r | |
400 | UsbBotExecCommand (\r | |
401 | IN VOID *Context,\r | |
402 | IN VOID *Cmd,\r | |
403 | IN UINT8 CmdLen,\r | |
404 | IN EFI_USB_DATA_DIRECTION DataDir,\r | |
405 | IN VOID *Data,\r | |
406 | IN UINT32 DataLen,\r | |
407 | IN UINT8 Lun,\r | |
408 | IN UINT32 Timeout,\r | |
409 | OUT UINT32 *CmdStatus\r | |
410 | )\r | |
411 | {\r | |
412 | USB_BOT_PROTOCOL *UsbBot;\r | |
413 | EFI_STATUS Status;\r | |
414 | UINTN TransLen;\r | |
415 | UINT8 Result;\r | |
416 | \r | |
417 | *CmdStatus = USB_MASS_CMD_FAIL;\r | |
418 | UsbBot = (USB_BOT_PROTOCOL *) Context;\r | |
419 | \r | |
420 | //\r | |
421 | // Send the command to the device. Return immediately if device\r | |
422 | // rejects the command.\r | |
423 | //\r | |
424 | Status = UsbBotSendCommand (UsbBot, Cmd, CmdLen, DataDir, DataLen, Lun);\r | |
425 | if (EFI_ERROR (Status)) {\r | |
426 | DEBUG ((EFI_D_ERROR, "UsbBotExecCommand: UsbBotSendCommand (%r)\n", Status));\r | |
427 | return Status;\r | |
428 | }\r | |
429 | \r | |
430 | //\r | |
431 | // Transfer the data. Don't return immediately even data transfer\r | |
432 | // failed. The host should attempt to receive the CSW no matter\r | |
433 | // whether it succeeds or fails.\r | |
434 | //\r | |
435 | TransLen = (UINTN) DataLen;\r | |
436 | UsbBotDataTransfer (UsbBot, DataDir, Data, &TransLen, Timeout);\r | |
437 | \r | |
438 | //\r | |
439 | // Get the status, if that succeeds, interpret the result\r | |
440 | //\r | |
441 | Status = UsbBotGetStatus (UsbBot, DataLen, &Result);\r | |
442 | if (EFI_ERROR (Status)) {\r | |
443 | DEBUG ((EFI_D_ERROR, "UsbBotExecCommand: UsbBotGetStatus (%r)\n", Status));\r | |
444 | return Status;\r | |
445 | }\r | |
446 | \r | |
447 | if (Result == 0) {\r | |
448 | *CmdStatus = USB_MASS_CMD_SUCCESS;\r | |
449 | }\r | |
450 | \r | |
451 | return EFI_SUCCESS;\r | |
452 | }\r | |
453 | \r | |
454 | \r | |
455 | /**\r | |
456 | Reset the USB mass storage device by BOT protocol.\r | |
457 | \r | |
458 | @param Context The context of the BOT protocol, that is,\r | |
459 | USB_BOT_PROTOCOL.\r | |
460 | @param ExtendedVerification If FALSE, just issue Bulk-Only Mass Storage Reset request.\r | |
461 | If TRUE, additionally reset parent hub port.\r | |
462 | \r | |
463 | @retval EFI_SUCCESS The device is reset.\r | |
464 | @retval Others Failed to reset the device..\r | |
465 | \r | |
466 | **/\r | |
467 | EFI_STATUS\r | |
468 | UsbBotResetDevice (\r | |
469 | IN VOID *Context,\r | |
470 | IN BOOLEAN ExtendedVerification\r | |
471 | )\r | |
472 | {\r | |
473 | USB_BOT_PROTOCOL *UsbBot;\r | |
474 | EFI_USB_DEVICE_REQUEST Request;\r | |
475 | EFI_STATUS Status;\r | |
476 | UINT32 Result;\r | |
477 | UINT32 Timeout;\r | |
478 | \r | |
479 | UsbBot = (USB_BOT_PROTOCOL *) Context;\r | |
480 | \r | |
481 | if (ExtendedVerification) {\r | |
482 | //\r | |
483 | // If we need to do strictly reset, reset its parent hub port\r | |
484 | //\r | |
485 | Status = UsbBot->UsbIo->UsbPortReset (UsbBot->UsbIo);\r | |
486 | if (EFI_ERROR (Status)) {\r | |
487 | return EFI_DEVICE_ERROR;\r | |
488 | }\r | |
489 | }\r | |
490 | \r | |
491 | //\r | |
492 | // Issue a class specific Bulk-Only Mass Storage Reset request,\r | |
493 | // according to section 3.1 of USB Mass Storage Class Bulk-Only Transport Spec, v1.0.\r | |
494 | //\r | |
495 | Request.RequestType = 0x21;\r | |
496 | Request.Request = USB_BOT_RESET_REQUEST;\r | |
497 | Request.Value = 0;\r | |
498 | Request.Index = UsbBot->Interface.InterfaceNumber;\r | |
499 | Request.Length = 0;\r | |
500 | Timeout = USB_BOT_RESET_DEVICE_TIMEOUT / USB_MASS_1_MILLISECOND;\r | |
501 | \r | |
502 | Status = UsbBot->UsbIo->UsbControlTransfer (\r | |
503 | UsbBot->UsbIo,\r | |
504 | &Request,\r | |
505 | EfiUsbNoData,\r | |
506 | Timeout,\r | |
507 | NULL,\r | |
508 | 0,\r | |
509 | &Result\r | |
510 | );\r | |
511 | \r | |
512 | if (EFI_ERROR (Status)) {\r | |
513 | return EFI_DEVICE_ERROR;\r | |
514 | }\r | |
515 | \r | |
516 | //\r | |
517 | // The device shall NAK the host's request until the reset is\r | |
518 | // complete. We can use this to sync the device and host. For\r | |
519 | // now just stall 100ms to wait for the device.\r | |
520 | //\r | |
521 | gBS->Stall (USB_BOT_RESET_DEVICE_STALL);\r | |
522 | \r | |
523 | //\r | |
524 | // Clear the Bulk-In and Bulk-Out stall condition.\r | |
525 | //\r | |
526 | UsbClearEndpointStall (UsbBot->UsbIo, UsbBot->BulkInEndpoint->EndpointAddress);\r | |
527 | UsbClearEndpointStall (UsbBot->UsbIo, UsbBot->BulkOutEndpoint->EndpointAddress);\r | |
528 | \r | |
529 | return Status;\r | |
530 | }\r | |
531 | \r | |
532 | \r | |
533 | /**\r | |
534 | Get the max LUN (Logical Unit Number) of USB mass storage device.\r | |
535 | \r | |
536 | @param Context The context of the BOT protocol, that is, USB_BOT_PROTOCOL\r | |
537 | @param MaxLun Return pointer to the max number of LUN. (e.g. MaxLun=1 means LUN0 and\r | |
538 | LUN1 in all.)\r | |
539 | \r | |
540 | @retval EFI_SUCCESS Max LUN is got successfully.\r | |
541 | @retval Others Fail to execute this request.\r | |
542 | \r | |
543 | **/\r | |
544 | EFI_STATUS\r | |
545 | UsbBotGetMaxLun (\r | |
546 | IN VOID *Context,\r | |
547 | OUT UINT8 *MaxLun\r | |
548 | )\r | |
549 | {\r | |
550 | USB_BOT_PROTOCOL *UsbBot;\r | |
551 | EFI_USB_DEVICE_REQUEST Request;\r | |
552 | EFI_STATUS Status;\r | |
553 | UINT32 Result;\r | |
554 | UINT32 Timeout;\r | |
555 | \r | |
556 | ASSERT (Context);\r | |
557 | \r | |
558 | UsbBot = (USB_BOT_PROTOCOL *) Context;\r | |
559 | \r | |
560 | //\r | |
561 | // Issue a class specific Bulk-Only Mass Storage get max lun reqest.\r | |
562 | // according to section 3.2 of USB Mass Storage Class Bulk-Only Transport Spec, v1.0.\r | |
563 | //\r | |
564 | Request.RequestType = 0xA1;\r | |
565 | Request.Request = USB_BOT_GETLUN_REQUEST;\r | |
566 | Request.Value = 0;\r | |
567 | Request.Index = UsbBot->Interface.InterfaceNumber;\r | |
568 | Request.Length = 1;\r | |
569 | Timeout = USB_BOT_RESET_DEVICE_TIMEOUT / USB_MASS_1_MILLISECOND;\r | |
570 | \r | |
571 | Status = UsbBot->UsbIo->UsbControlTransfer (\r | |
572 | UsbBot->UsbIo,\r | |
573 | &Request,\r | |
574 | EfiUsbDataIn,\r | |
575 | Timeout,\r | |
576 | (VOID *) MaxLun,\r | |
577 | 1,\r | |
578 | &Result\r | |
579 | );\r | |
580 | \r | |
581 | return Status;\r | |
582 | }\r | |
583 | \r | |
584 | /**\r | |
585 | Clean up the resource used by this BOT protocol.\r | |
586 | \r | |
587 | @param Context The context of the BOT protocol, that is, USB_BOT_PROTOCOL.\r | |
588 | \r | |
589 | @retval EFI_SUCCESS The resource is cleaned up.\r | |
590 | \r | |
591 | **/\r | |
592 | EFI_STATUS\r | |
593 | UsbBotCleanUp (\r | |
594 | IN VOID *Context\r | |
595 | )\r | |
596 | {\r | |
597 | FreePool (Context);\r | |
598 | return EFI_SUCCESS;\r | |
599 | }\r | |
600 | \r |