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a5cc178a HW |
1 | /** @file\r |
2 | The SioBusDxe driver is used to create child devices on the ISA bus and\r | |
3 | installs the Super I/O protocols on them.\r | |
4 | \r | |
5 | Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>\r | |
6 | \r | |
b26f0cf9 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
a5cc178a HW |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #include "SioBusDxe.h"\r | |
12 | \r | |
13 | //\r | |
14 | // SioBus Driver Binding Protocol\r | |
15 | //\r | |
ac0a286f | 16 | EFI_DRIVER_BINDING_PROTOCOL gSioBusDriverBinding = {\r |
a5cc178a HW |
17 | SioBusDriverBindingSupported,\r |
18 | SioBusDriverBindingStart,\r | |
19 | SioBusDriverBindingStop,\r | |
20 | 0x10,\r | |
21 | NULL,\r | |
22 | NULL\r | |
23 | };\r | |
24 | \r | |
a5cc178a HW |
25 | /**\r |
26 | Tests to see if this driver supports a given controller. If a child device is\r | |
27 | provided, it further tests to see if this driver supports creating a handle\r | |
28 | for the specified child device.\r | |
29 | \r | |
30 | This function checks to see if the driver specified by This supports the\r | |
31 | device specified by ControllerHandle. Drivers will typically use the device\r | |
32 | path attached to ControllerHandle and/or the services from the bus I/O\r | |
33 | abstraction attached to ControllerHandle to determine if the driver supports\r | |
34 | ControllerHandle. This function may be called many times during platform\r | |
35 | initialization. In order to reduce boot times, the tests performed by this\r | |
36 | function must be very small, and take as little time as possible to execute.\r | |
37 | This function must not change the state of any hardware devices, and this\r | |
38 | function must be aware that the device specified by ControllerHandle may\r | |
39 | already be managed by the same driver or a different driver. This function\r | |
40 | must match its calls to AllocatePages() with FreePages(), AllocatePool() with\r | |
41 | FreePool(), and OpenProtocol() with CloseProtocol(). Since ControllerHandle\r | |
42 | may have been previously started by the same driver, if a protocol is already\r | |
43 | in the opened state, then it must not be closed with CloseProtocol(). This is\r | |
44 | required to guarantee the state of ControllerHandle is not modified by this\r | |
45 | function.\r | |
46 | \r | |
47 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL\r | |
48 | instance.\r | |
49 | @param[in] ControllerHandle The handle of the controller to test. This\r | |
50 | handle must support a protocol interface\r | |
51 | that supplies an I/O abstraction to the\r | |
52 | driver.\r | |
53 | @param[in] RemainingDevicePath A pointer to the remaining portion of a\r | |
54 | device path. This parameter is ignored by\r | |
55 | device drivers, and is optional for bus\r | |
56 | drivers. For bus drivers, if this parameter\r | |
57 | is not NULL, then the bus driver must\r | |
58 | determine if the bus controller specified by\r | |
59 | ControllerHandle and the child controller\r | |
60 | specified by RemainingDevicePath are both\r | |
61 | supported by this bus driver.\r | |
62 | \r | |
63 | @retval EFI_SUCCESS The device specified by ControllerHandle and\r | |
64 | RemainingDevicePath is supported by the\r | |
65 | driver specified by This.\r | |
66 | @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and\r | |
67 | RemainingDevicePath is already being managed\r | |
68 | by the driver specified by This.\r | |
69 | @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and\r | |
70 | RemainingDevicePath is already being managed\r | |
71 | by a different driver or an application that\r | |
72 | requires exclusive access.\r | |
73 | @retval EFI_UNSUPPORTED The device specified by ControllerHandle and\r | |
74 | RemainingDevicePath is not supported by the\r | |
75 | driver specified by This.\r | |
76 | \r | |
77 | **/\r | |
78 | EFI_STATUS\r | |
79 | EFIAPI\r | |
80 | SioBusDriverBindingSupported (\r | |
ac0a286f MK |
81 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
82 | IN EFI_HANDLE Controller,\r | |
83 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
a5cc178a HW |
84 | )\r |
85 | {\r | |
ac0a286f MK |
86 | EFI_STATUS Status;\r |
87 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
88 | PCI_TYPE00 Pci;\r | |
89 | UINTN SegmentNumber;\r | |
90 | UINTN BusNumber;\r | |
91 | UINTN DeviceNumber;\r | |
92 | UINTN FunctionNumber;\r | |
a5cc178a HW |
93 | \r |
94 | //\r | |
95 | // Get PciIo protocol instance\r | |
96 | //\r | |
97 | Status = gBS->OpenProtocol (\r | |
98 | Controller,\r | |
99 | &gEfiPciIoProtocolGuid,\r | |
ac0a286f | 100 | (VOID **)&PciIo,\r |
a5cc178a HW |
101 | This->DriverBindingHandle,\r |
102 | Controller,\r | |
103 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
104 | );\r | |
ac0a286f | 105 | if (EFI_ERROR (Status)) {\r |
a5cc178a HW |
106 | return Status;\r |
107 | }\r | |
108 | \r | |
109 | Status = PciIo->Pci.Read (\r | |
ac0a286f MK |
110 | PciIo,\r |
111 | EfiPciIoWidthUint32,\r | |
112 | 0,\r | |
113 | sizeof (Pci) / sizeof (UINT32),\r | |
114 | &Pci\r | |
115 | );\r | |
a5cc178a HW |
116 | \r |
117 | if (!EFI_ERROR (Status)) {\r | |
118 | Status = EFI_UNSUPPORTED;\r | |
119 | if ((Pci.Hdr.Command & 0x03) == 0x03) {\r | |
120 | if (Pci.Hdr.ClassCode[2] == PCI_CLASS_BRIDGE) {\r | |
121 | //\r | |
122 | // See if this is a standard PCI to ISA Bridge from the Base Code and\r | |
123 | // Class Code\r | |
124 | //\r | |
125 | if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA) {\r | |
126 | Status = EFI_SUCCESS;\r | |
127 | }\r | |
128 | \r | |
129 | //\r | |
130 | // See if this is an Intel PCI to ISA bridge in Positive Decode Mode\r | |
131 | //\r | |
ac0a286f MK |
132 | if ((Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA_PDECODE) &&\r |
133 | (Pci.Hdr.VendorId == 0x8086))\r | |
134 | {\r | |
a5cc178a HW |
135 | //\r |
136 | // See if this is on Function #0 to avoid false positives on\r | |
137 | // PCI_CLASS_BRIDGE_OTHER that has the same value as\r | |
138 | // PCI_CLASS_BRIDGE_ISA_PDECODE\r | |
139 | //\r | |
140 | Status = PciIo->GetLocation (\r | |
141 | PciIo,\r | |
142 | &SegmentNumber,\r | |
143 | &BusNumber,\r | |
144 | &DeviceNumber,\r | |
145 | &FunctionNumber\r | |
146 | );\r | |
ac0a286f | 147 | if (!EFI_ERROR (Status) && (FunctionNumber == 0)) {\r |
a5cc178a HW |
148 | Status = EFI_SUCCESS;\r |
149 | } else {\r | |
150 | Status = EFI_UNSUPPORTED;\r | |
151 | }\r | |
152 | }\r | |
153 | }\r | |
154 | }\r | |
155 | }\r | |
156 | \r | |
157 | gBS->CloseProtocol (\r | |
158 | Controller,\r | |
159 | &gEfiPciIoProtocolGuid,\r | |
160 | This->DriverBindingHandle,\r | |
161 | Controller\r | |
162 | );\r | |
163 | \r | |
164 | return Status;\r | |
165 | }\r | |
166 | \r | |
167 | /**\r | |
168 | Starts a device controller or a bus controller.\r | |
169 | \r | |
170 | The Start() function is designed to be invoked from the EFI boot service\r | |
171 | ConnectController(). As a result, much of the error checking on the\r | |
172 | parameters to Start() has been moved into this common boot service. It is\r | |
173 | legal to call Start() from other locations, but the following calling\r | |
174 | restrictions must be followed or the system behavior will not be\r | |
175 | deterministic.\r | |
176 | 1. ControllerHandle must be a valid EFI_HANDLE.\r | |
177 | 2. If RemainingDevicePath is not NULL, then it must be a pointer to a\r | |
178 | naturally aligned EFI_DEVICE_PATH_PROTOCOL.\r | |
179 | 3. Prior to calling Start(), the Supported() function for the driver\r | |
180 | specified by This must have been called with the same calling parameters,\r | |
181 | and Supported() must have returned EFI_SUCCESS.\r | |
182 | \r | |
183 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL\r | |
184 | instance.\r | |
185 | @param[in] ControllerHandle The handle of the controller to start. This\r | |
186 | handle must support a protocol interface\r | |
187 | that supplies an I/O abstraction to the\r | |
188 | driver.\r | |
189 | @param[in] RemainingDevicePath A pointer to the remaining portion of a\r | |
190 | device path. This parameter is ignored by\r | |
191 | device drivers, and is optional for bus\r | |
192 | drivers. For a bus driver, if this parameter\r | |
193 | is NULL, then handles for all the children\r | |
194 | of Controller are created by this driver. If\r | |
195 | this parameter is not NULL and the first\r | |
196 | Device Path Node is not the End of Device\r | |
197 | Path Node, then only the handle for the\r | |
198 | child device specified by the first Device\r | |
199 | Path Node of RemainingDevicePath is created\r | |
200 | by this driver. If the first Device Path\r | |
201 | Node of RemainingDevicePath is the End of\r | |
202 | Device Path Node, no child handle is created\r | |
203 | by this driver.\r | |
204 | \r | |
205 | @retval EFI_SUCCESS The device was started.\r | |
206 | @retval EFI_DEVICE_ERROR The device could not be started due to a\r | |
207 | device error.\r | |
208 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a\r | |
209 | lack of resources.\r | |
210 | @retval Others The driver failded to start the device.\r | |
211 | \r | |
212 | **/\r | |
213 | EFI_STATUS\r | |
214 | EFIAPI\r | |
215 | SioBusDriverBindingStart (\r | |
ac0a286f MK |
216 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
217 | IN EFI_HANDLE Controller,\r | |
218 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath\r | |
a5cc178a HW |
219 | )\r |
220 | {\r | |
ac0a286f MK |
221 | EFI_STATUS Status;\r |
222 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
223 | EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;\r | |
224 | UINT64 Supports;\r | |
225 | UINT64 OriginalAttributes;\r | |
226 | UINT64 Attributes;\r | |
227 | BOOLEAN Enabled;\r | |
228 | SIO_BUS_DRIVER_PRIVATE_DATA *Private;\r | |
229 | UINT32 ChildDeviceNumber;\r | |
a5cc178a HW |
230 | \r |
231 | Enabled = FALSE;\r | |
232 | Supports = 0;\r | |
233 | OriginalAttributes = 0;\r | |
234 | Private = NULL;\r | |
235 | \r | |
236 | //\r | |
237 | // Open the PCI I/O Protocol Interface\r | |
238 | //\r | |
ac0a286f | 239 | PciIo = NULL;\r |
a5cc178a HW |
240 | Status = gBS->OpenProtocol (\r |
241 | Controller,\r | |
242 | &gEfiPciIoProtocolGuid,\r | |
ac0a286f | 243 | (VOID **)&PciIo,\r |
a5cc178a HW |
244 | This->DriverBindingHandle,\r |
245 | Controller,\r | |
246 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
247 | );\r | |
248 | if (EFI_ERROR (Status)) {\r | |
249 | return Status;\r | |
250 | }\r | |
251 | \r | |
252 | //\r | |
253 | // Open Device Path Protocol\r | |
254 | //\r | |
255 | Status = gBS->OpenProtocol (\r | |
256 | Controller,\r | |
257 | &gEfiDevicePathProtocolGuid,\r | |
ac0a286f | 258 | (VOID **)&ParentDevicePath,\r |
a5cc178a HW |
259 | This->DriverBindingHandle,\r |
260 | Controller,\r | |
261 | EFI_OPEN_PROTOCOL_BY_DRIVER\r | |
262 | );\r | |
263 | if (EFI_ERROR (Status)) {\r | |
264 | gBS->CloseProtocol (\r | |
265 | Controller,\r | |
266 | &gEfiPciIoProtocolGuid,\r | |
267 | This->DriverBindingHandle,\r | |
268 | Controller\r | |
269 | );\r | |
270 | return Status;\r | |
271 | }\r | |
272 | \r | |
273 | //\r | |
274 | // Get supported PCI attributes\r | |
275 | //\r | |
276 | Status = PciIo->Attributes (\r | |
277 | PciIo,\r | |
278 | EfiPciIoAttributeOperationSupported,\r | |
279 | 0,\r | |
280 | &Supports\r | |
281 | );\r | |
282 | if (EFI_ERROR (Status)) {\r | |
283 | goto Done;\r | |
284 | }\r | |
285 | \r | |
ac0a286f MK |
286 | Supports &= (UINT64)(EFI_PCI_IO_ATTRIBUTE_ISA_IO |\r |
287 | EFI_PCI_IO_ATTRIBUTE_ISA_IO_16);\r | |
288 | if ((Supports == 0) ||\r | |
289 | (Supports == (EFI_PCI_IO_ATTRIBUTE_ISA_IO |\r | |
290 | EFI_PCI_IO_ATTRIBUTE_ISA_IO_16)))\r | |
291 | {\r | |
a5cc178a HW |
292 | Status = EFI_UNSUPPORTED;\r |
293 | goto Done;\r | |
294 | }\r | |
295 | \r | |
296 | Status = PciIo->Attributes (\r | |
297 | PciIo,\r | |
298 | EfiPciIoAttributeOperationGet,\r | |
299 | 0,\r | |
300 | &OriginalAttributes\r | |
301 | );\r | |
302 | if (EFI_ERROR (Status)) {\r | |
303 | goto Done;\r | |
304 | }\r | |
305 | \r | |
306 | Attributes = EFI_PCI_DEVICE_ENABLE |\r | |
307 | Supports |\r | |
308 | EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO;\r | |
309 | Status = PciIo->Attributes (\r | |
310 | PciIo,\r | |
311 | EfiPciIoAttributeOperationEnable,\r | |
312 | Attributes,\r | |
313 | NULL\r | |
314 | );\r | |
315 | if (EFI_ERROR (Status)) {\r | |
316 | goto Done;\r | |
317 | }\r | |
318 | \r | |
319 | Enabled = TRUE;\r | |
320 | \r | |
321 | //\r | |
322 | // Store the OriginalAttributes for the restore in BindingStop()\r | |
323 | //\r | |
324 | Private = AllocateZeroPool (sizeof (SIO_BUS_DRIVER_PRIVATE_DATA));\r | |
325 | if (Private == NULL) {\r | |
326 | Status = EFI_OUT_OF_RESOURCES;\r | |
327 | goto Done;\r | |
328 | }\r | |
ac0a286f | 329 | \r |
a5cc178a HW |
330 | Private->PciIo = PciIo;\r |
331 | Private->OriginalAttributes = OriginalAttributes;\r | |
332 | \r | |
333 | Status = gBS->InstallProtocolInterface (\r | |
334 | &Controller,\r | |
335 | &gEfiCallerIdGuid,\r | |
336 | EFI_NATIVE_INTERFACE,\r | |
337 | Private\r | |
338 | );\r | |
339 | if (EFI_ERROR (Status)) {\r | |
340 | goto Done;\r | |
341 | }\r | |
342 | \r | |
343 | //\r | |
344 | // Report status code for the start of general controller initialization\r | |
345 | //\r | |
346 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
347 | EFI_PROGRESS_CODE,\r | |
348 | (EFI_IO_BUS_LPC | EFI_IOB_PC_INIT),\r | |
349 | ParentDevicePath\r | |
350 | );\r | |
351 | \r | |
352 | //\r | |
353 | // Report status code for the start of enabling devices on the bus\r | |
354 | //\r | |
355 | REPORT_STATUS_CODE_WITH_DEVICE_PATH (\r | |
356 | EFI_PROGRESS_CODE,\r | |
357 | (EFI_IO_BUS_LPC | EFI_IOB_PC_ENABLE),\r | |
358 | ParentDevicePath\r | |
359 | );\r | |
360 | \r | |
361 | //\r | |
362 | // Create all the children upon the first entrance\r | |
363 | //\r | |
364 | ChildDeviceNumber = SioCreateAllChildDevices (\r | |
365 | This,\r | |
366 | Controller,\r | |
367 | PciIo,\r | |
368 | ParentDevicePath\r | |
369 | );\r | |
370 | if (ChildDeviceNumber == 0) {\r | |
371 | Status = EFI_DEVICE_ERROR;\r | |
372 | }\r | |
373 | \r | |
374 | Done:\r | |
375 | if (EFI_ERROR (Status)) {\r | |
ac0a286f | 376 | if ((PciIo != NULL) && Enabled) {\r |
a5cc178a HW |
377 | PciIo->Attributes (\r |
378 | PciIo,\r | |
379 | EfiPciIoAttributeOperationSet,\r | |
380 | OriginalAttributes,\r | |
381 | NULL\r | |
382 | );\r | |
383 | }\r | |
384 | \r | |
385 | gBS->CloseProtocol (\r | |
386 | Controller,\r | |
387 | &gEfiDevicePathProtocolGuid,\r | |
388 | This->DriverBindingHandle,\r | |
389 | Controller\r | |
390 | );\r | |
391 | \r | |
392 | gBS->CloseProtocol (\r | |
393 | Controller,\r | |
394 | &gEfiPciIoProtocolGuid,\r | |
395 | This->DriverBindingHandle,\r | |
396 | Controller\r | |
397 | );\r | |
398 | \r | |
399 | if (Private != NULL) {\r | |
400 | gBS->UninstallMultipleProtocolInterfaces (\r | |
401 | Controller,\r | |
402 | &gEfiCallerIdGuid,\r | |
403 | Private,\r | |
404 | NULL\r | |
405 | );\r | |
406 | FreePool (Private);\r | |
407 | }\r | |
408 | \r | |
409 | return Status;\r | |
410 | }\r | |
411 | \r | |
412 | return EFI_SUCCESS;\r | |
413 | }\r | |
414 | \r | |
415 | /**\r | |
416 | Stops a device controller or a bus controller.\r | |
417 | \r | |
418 | The Stop() function is designed to be invoked from the EFI boot service\r | |
419 | DisconnectController(). As a result, much of the error checking on the\r | |
420 | parameters to Stop() has been moved into this common boot service. It is\r | |
421 | legal to call Stop() from other locations, but the following calling\r | |
422 | restrictions must be followed or the system behavior will not be\r | |
423 | deterministic.\r | |
424 | 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous\r | |
425 | call to this same driver's Start() function.\r | |
426 | 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a\r | |
427 | valid EFI_HANDLE. In addition, all of these handles must have been created\r | |
428 | in this driver's Start() function, and the Start() function must have\r | |
429 | called OpenProtocol() on ControllerHandle with an Attribute of\r | |
430 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.\r | |
431 | \r | |
432 | @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL\r | |
433 | instance.\r | |
434 | @param[in] ControllerHandle A handle to the device being stopped. The\r | |
435 | handle must support a bus specific I/O\r | |
436 | protocol for the driver to use to stop the\r | |
437 | device.\r | |
438 | @param[in] NumberOfChildren The number of child device handles in\r | |
439 | ChildHandleBuffer.\r | |
440 | @param[in] ChildHandleBuffer An array of child handles to be freed. May be\r | |
441 | NULL if NumberOfChildren is 0.\r | |
442 | \r | |
443 | @retval EFI_SUCCESS The device was stopped.\r | |
444 | @retval EFI_DEVICE_ERROR The device could not be stopped due to a\r | |
445 | device error.\r | |
446 | \r | |
447 | **/\r | |
448 | EFI_STATUS\r | |
449 | EFIAPI\r | |
450 | SioBusDriverBindingStop (\r | |
ac0a286f MK |
451 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
452 | IN EFI_HANDLE Controller,\r | |
453 | IN UINTN NumberOfChildren,\r | |
454 | IN EFI_HANDLE *ChildHandleBuffer\r | |
a5cc178a HW |
455 | )\r |
456 | {\r | |
ac0a286f MK |
457 | EFI_STATUS Status;\r |
458 | SIO_BUS_DRIVER_PRIVATE_DATA *Private;\r | |
459 | UINTN Index;\r | |
460 | BOOLEAN AllChildrenStopped;\r | |
461 | EFI_SIO_PROTOCOL *Sio;\r | |
462 | SIO_DEV *SioDevice;\r | |
463 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
a5cc178a HW |
464 | \r |
465 | if (NumberOfChildren == 0) {\r | |
466 | //\r | |
467 | // Restore PCI attributes\r | |
468 | //\r | |
469 | Status = gBS->OpenProtocol (\r | |
470 | Controller,\r | |
471 | &gEfiCallerIdGuid,\r | |
ac0a286f | 472 | (VOID **)&Private,\r |
a5cc178a HW |
473 | This->DriverBindingHandle,\r |
474 | Controller,\r | |
475 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
476 | );\r | |
477 | if (EFI_ERROR (Status)) {\r | |
478 | return Status;\r | |
479 | }\r | |
480 | \r | |
481 | Status = Private->PciIo->Attributes (\r | |
482 | Private->PciIo,\r | |
483 | EfiPciIoAttributeOperationSet,\r | |
484 | Private->OriginalAttributes,\r | |
485 | NULL\r | |
486 | );\r | |
487 | if (EFI_ERROR (Status)) {\r | |
488 | return Status;\r | |
489 | }\r | |
490 | \r | |
491 | gBS->UninstallProtocolInterface (\r | |
ac0a286f MK |
492 | Controller,\r |
493 | &gEfiCallerIdGuid,\r | |
494 | Private\r | |
495 | );\r | |
a5cc178a HW |
496 | FreePool (Private);\r |
497 | \r | |
498 | //\r | |
499 | // Close the bus driver\r | |
500 | //\r | |
501 | Status = gBS->CloseProtocol (\r | |
502 | Controller,\r | |
503 | &gEfiDevicePathProtocolGuid,\r | |
504 | This->DriverBindingHandle,\r | |
505 | Controller\r | |
506 | );\r | |
507 | if (EFI_ERROR (Status)) {\r | |
508 | return Status;\r | |
509 | }\r | |
510 | \r | |
511 | Status = gBS->CloseProtocol (\r | |
512 | Controller,\r | |
513 | &gEfiPciIoProtocolGuid,\r | |
514 | This->DriverBindingHandle,\r | |
515 | Controller\r | |
516 | );\r | |
517 | if (EFI_ERROR (Status)) {\r | |
518 | return Status;\r | |
519 | }\r | |
520 | \r | |
521 | return EFI_SUCCESS;\r | |
522 | }\r | |
523 | \r | |
524 | //\r | |
525 | // Stop all the children\r | |
526 | //\r | |
527 | AllChildrenStopped = TRUE;\r | |
528 | \r | |
529 | for (Index = 0; Index < NumberOfChildren; Index++) {\r | |
530 | Status = gBS->OpenProtocol (\r | |
531 | ChildHandleBuffer[Index],\r | |
532 | &gEfiSioProtocolGuid,\r | |
ac0a286f | 533 | (VOID **)&Sio,\r |
a5cc178a HW |
534 | This->DriverBindingHandle,\r |
535 | Controller,\r | |
536 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
537 | );\r | |
538 | if (!EFI_ERROR (Status)) {\r | |
539 | SioDevice = SIO_DEV_FROM_SIO (Sio);\r | |
540 | \r | |
541 | //\r | |
542 | // Close the child handle\r | |
543 | //\r | |
544 | Status = gBS->CloseProtocol (\r | |
545 | Controller,\r | |
546 | &gEfiPciIoProtocolGuid,\r | |
547 | This->DriverBindingHandle,\r | |
548 | ChildHandleBuffer[Index]\r | |
549 | );\r | |
550 | Status = gBS->UninstallMultipleProtocolInterfaces (\r | |
551 | ChildHandleBuffer[Index],\r | |
552 | &gEfiDevicePathProtocolGuid,\r | |
553 | SioDevice->DevicePath,\r | |
554 | &gEfiSioProtocolGuid,\r | |
555 | &SioDevice->Sio,\r | |
556 | NULL\r | |
557 | );\r | |
558 | \r | |
559 | if (!EFI_ERROR (Status)) {\r | |
560 | FreePool (SioDevice->DevicePath);\r | |
561 | FreePool (SioDevice);\r | |
562 | } else {\r | |
563 | //\r | |
564 | // Re-open PCI IO Protocol on behalf of the child device\r | |
565 | // because of failure of destroying the child device handle\r | |
566 | //\r | |
567 | gBS->OpenProtocol (\r | |
568 | Controller,\r | |
569 | &gEfiPciIoProtocolGuid,\r | |
ac0a286f | 570 | (VOID **)&PciIo,\r |
a5cc178a HW |
571 | This->DriverBindingHandle,\r |
572 | ChildHandleBuffer[Index],\r | |
573 | EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER\r | |
574 | );\r | |
575 | }\r | |
576 | }\r | |
577 | \r | |
578 | if (EFI_ERROR (Status)) {\r | |
579 | AllChildrenStopped = FALSE;\r | |
580 | }\r | |
581 | }\r | |
582 | \r | |
583 | if (!AllChildrenStopped) {\r | |
584 | return EFI_DEVICE_ERROR;\r | |
585 | }\r | |
586 | \r | |
587 | return EFI_SUCCESS;\r | |
588 | }\r | |
589 | \r | |
590 | /**\r | |
591 | The entry point for the SioBusDxe driver.\r | |
592 | \r | |
593 | @param[in] ImageHandle The firmware allocated handle for the EFI image.\r | |
594 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
595 | \r | |
596 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
597 | @retval other Some error occurs when executing this entry point.\r | |
598 | \r | |
599 | **/\r | |
600 | EFI_STATUS\r | |
601 | EFIAPI\r | |
602 | SioBusDxeDriverEntryPoint (\r | |
ac0a286f MK |
603 | IN EFI_HANDLE ImageHandle,\r |
604 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
a5cc178a HW |
605 | )\r |
606 | {\r | |
607 | //\r | |
608 | // Install driver model protocol(s).\r | |
609 | //\r | |
610 | return EfiLibInstallDriverBindingComponentName2 (\r | |
611 | ImageHandle,\r | |
612 | SystemTable,\r | |
613 | &gSioBusDriverBinding,\r | |
614 | ImageHandle,\r | |
615 | &gSioBusComponentName,\r | |
616 | &gSioBusComponentName2\r | |
617 | );\r | |
618 | }\r |