1 // SPDX-License-Identifier: GPL-2.0+
8  * - creates a handle
9  * - installs the driver binding protocol
12  * binding protocol.
14  * In bind() and stop() it checks if the controller implements the protocol
23  * check_node_type() - check node type
35 	/* Open the device path protocol */  in check_node_type()
36 	r = EFI_CALL(systab.boottime->open_protocol(  in check_node_type()
40 		/* Get the last node */  in check_node_type()
41 		const struct efi_device_path *node = efi_dp_last_node(dp);  in check_node_type()  local
43 		if (!node || node->type == DEVICE_PATH_TYPE_MEDIA_DEVICE)  in check_node_type()
50  * efi_uc_supported() - check if the driver supports the controller
52  * @this:			driver binding protocol
70 	ret = EFI_CALL(systab.boottime->open_protocol(  in efi_uc_supported()
71 			controller_handle, bp->ops->protocol,  in efi_uc_supported()
72 			&interface, this->driver_binding_handle,  in efi_uc_supported()
87 	r = EFI_CALL(systab.boottime->close_protocol(  in efi_uc_supported()
88 				controller_handle, bp->ops->protocol,  in efi_uc_supported()
89 				this->driver_binding_handle,  in efi_uc_supported()
98  * efi_uc_start() - create child controllers and attach driver
100  * @this:			driver binding protocol
119 	ret = EFI_CALL(systab.boottime->open_protocol(  in efi_uc_start()
120 			controller_handle, bp->ops->protocol,  in efi_uc_start()
121 			&interface, this->driver_binding_handle,  in efi_uc_start()
135 		r = EFI_CALL(systab.boottime->close_protocol(  in efi_uc_start()
136 				controller_handle, bp->ops->protocol,  in efi_uc_start()
137 				this->driver_binding_handle,  in efi_uc_start()
145 	bp->ops->bind(controller_handle, interface);  in efi_uc_start()
152  * disconnect_child() - remove a single child controller from the parent
166 	ret = EFI_CALL(systab.boottime->close_protocol(  in disconnect_child()
170 		EFI_PRINT("Cannot close protocol\n");  in disconnect_child()
173 	ret = EFI_CALL(systab.boottime->uninstall_protocol_interface(  in disconnect_child()
176 		EFI_PRINT("Cannot uninstall protocol interface\n");  in disconnect_child()
183  * efi_uc_stop() - Remove child controllers and disconnect the controller
185  * @this:			driver binding protocol
219 	ret = EFI_CALL(systab.boottime->open_protocol_information(  in efi_uc_stop()
225 		if (entry_buffer[--count].attributes &  in efi_uc_stop()
234 	ret = EFI_CALL(systab.boottime->free_pool(entry_buffer));  in efi_uc_stop()
239 	ret = EFI_CALL(systab.boottime->close_protocol(  in efi_uc_stop()
241 			this->driver_binding_handle, controller_handle));  in efi_uc_stop()
247  * efi_add_driver() - add driver
255 	const struct efi_driver_ops *ops = drv->ops;  in efi_add_driver()
258 	debug("EFI: Adding driver '%s'\n", drv->name);  in efi_add_driver()
259 	if (!ops->protocol) {  in efi_add_driver()
260 		printf("EFI: ERROR: protocol GUID missing for driver '%s'\n",  in efi_add_driver()
261 		       drv->name);  in efi_add_driver()
268 	bp->bp.supported = efi_uc_supported;  in efi_add_driver()
269 	bp->bp.start = efi_uc_start;  in efi_add_driver()
270 	bp->bp.stop = efi_uc_stop;  in efi_add_driver()
271 	bp->bp.version = 0xffffffff;  in efi_add_driver()
272 	bp->ops = drv->ops;  in efi_add_driver()
274 	ret = efi_create_handle(&bp->bp.driver_binding_handle);  in efi_add_driver()
279 	bp->bp.image_handle = bp->bp.driver_binding_handle;  in efi_add_driver()
280 	ret = efi_add_protocol(bp->bp.driver_binding_handle,  in efi_add_driver()
283 		efi_delete_handle(bp->bp.driver_binding_handle);  in efi_add_driver()
292  * efi_driver_init() - initialize the EFI drivers
309 		if (drv->id == UCLASS_EFI) {  in efi_driver_init()
313 				       drv->name);  in efi_driver_init()
322  * efi_uc_init() - initialize the EFI uclass
334  * efi_uc_destroy() - destroy the EFI uclass