16494d708SSimon Glass /* 26494d708SSimon Glass * Copyright (c) 2013 Google, Inc 36494d708SSimon Glass * 46494d708SSimon Glass * (C) Copyright 2012 56494d708SSimon Glass * Pavel Herrmann <morpheus.ibis@gmail.com> 66494d708SSimon Glass * 76494d708SSimon Glass * SPDX-License-Identifier: GPL-2.0+ 86494d708SSimon Glass */ 96494d708SSimon Glass 106494d708SSimon Glass #include <common.h> 116494d708SSimon Glass #include <errno.h> 126494d708SSimon Glass #include <malloc.h> 136a6d8fbeSSimon Glass #include <libfdt.h> 146494d708SSimon Glass #include <dm/device.h> 156494d708SSimon Glass #include <dm/device-internal.h> 166494d708SSimon Glass #include <dm/lists.h> 176494d708SSimon Glass #include <dm/platdata.h> 18fd536d81SJeroen Hofstee #include <dm/root.h> 196494d708SSimon Glass #include <dm/uclass.h> 206494d708SSimon Glass #include <dm/util.h> 216494d708SSimon Glass #include <linux/list.h> 226494d708SSimon Glass 236494d708SSimon Glass DECLARE_GLOBAL_DATA_PTR; 246494d708SSimon Glass 256494d708SSimon Glass static const struct driver_info root_info = { 266494d708SSimon Glass .name = "root_driver", 276494d708SSimon Glass }; 286494d708SSimon Glass 2954c5d08aSHeiko Schocher struct udevice *dm_root(void) 306494d708SSimon Glass { 316494d708SSimon Glass if (!gd->dm_root) { 326494d708SSimon Glass dm_warn("Virtual root driver does not exist!\n"); 336494d708SSimon Glass return NULL; 346494d708SSimon Glass } 356494d708SSimon Glass 366494d708SSimon Glass return gd->dm_root; 376494d708SSimon Glass } 386494d708SSimon Glass 396494d708SSimon Glass int dm_init(void) 406494d708SSimon Glass { 416494d708SSimon Glass int ret; 426494d708SSimon Glass 436494d708SSimon Glass if (gd->dm_root) { 446494d708SSimon Glass dm_warn("Virtual root driver already exists!\n"); 456494d708SSimon Glass return -EINVAL; 466494d708SSimon Glass } 4789876a55SSimon Glass INIT_LIST_HEAD(&DM_UCLASS_ROOT_NON_CONST); 486494d708SSimon Glass 49*00606d7eSSimon Glass ret = device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST); 506494d708SSimon Glass if (ret) 516494d708SSimon Glass return ret; 527497812dSSimon Glass ret = device_probe(DM_ROOT_NON_CONST); 537497812dSSimon Glass if (ret) 547497812dSSimon Glass return ret; 556494d708SSimon Glass 566494d708SSimon Glass return 0; 576494d708SSimon Glass } 586494d708SSimon Glass 599adbd7a1SSimon Glass int dm_uninit(void) 609adbd7a1SSimon Glass { 619adbd7a1SSimon Glass device_remove(dm_root()); 629adbd7a1SSimon Glass device_unbind(dm_root()); 639adbd7a1SSimon Glass 649adbd7a1SSimon Glass return 0; 659adbd7a1SSimon Glass } 669adbd7a1SSimon Glass 67*00606d7eSSimon Glass int dm_scan_platdata(bool pre_reloc_only) 686494d708SSimon Glass { 696494d708SSimon Glass int ret; 706494d708SSimon Glass 71*00606d7eSSimon Glass ret = lists_bind_drivers(DM_ROOT_NON_CONST, pre_reloc_only); 726494d708SSimon Glass if (ret == -ENOENT) { 736494d708SSimon Glass dm_warn("Some drivers were not found\n"); 746494d708SSimon Glass ret = 0; 756494d708SSimon Glass } 766494d708SSimon Glass if (ret) 776494d708SSimon Glass return ret; 786494d708SSimon Glass 796494d708SSimon Glass return 0; 806494d708SSimon Glass } 816494d708SSimon Glass 826494d708SSimon Glass #ifdef CONFIG_OF_CONTROL 83*00606d7eSSimon Glass int dm_scan_fdt(const void *blob, bool pre_reloc_only) 846494d708SSimon Glass { 856494d708SSimon Glass int offset = 0; 866494d708SSimon Glass int ret = 0, err; 876494d708SSimon Glass int depth = 0; 886494d708SSimon Glass 896494d708SSimon Glass do { 906494d708SSimon Glass offset = fdt_next_node(blob, offset, &depth); 916494d708SSimon Glass if (offset > 0 && depth == 1) { 92*00606d7eSSimon Glass if (pre_reloc_only && 93*00606d7eSSimon Glass !fdt_getprop(blob, offset, "u-boot,dm-pre-reloc", NULL)) 94*00606d7eSSimon Glass continue; 956494d708SSimon Glass err = lists_bind_fdt(gd->dm_root, blob, offset); 966494d708SSimon Glass if (err && !ret) 976494d708SSimon Glass ret = err; 986494d708SSimon Glass } 996494d708SSimon Glass } while (offset > 0); 1006494d708SSimon Glass 1016494d708SSimon Glass if (ret) 1026494d708SSimon Glass dm_warn("Some drivers failed to bind\n"); 1036494d708SSimon Glass 1046494d708SSimon Glass return ret; 1056494d708SSimon Glass } 1066494d708SSimon Glass #endif 1076494d708SSimon Glass 1086494d708SSimon Glass /* This is the root driver - all drivers are children of this */ 1096494d708SSimon Glass U_BOOT_DRIVER(root_driver) = { 1106494d708SSimon Glass .name = "root_driver", 1116494d708SSimon Glass .id = UCLASS_ROOT, 1126494d708SSimon Glass }; 1136494d708SSimon Glass 1146494d708SSimon Glass /* This is the root uclass */ 1156494d708SSimon Glass UCLASS_DRIVER(root) = { 1166494d708SSimon Glass .name = "root", 1176494d708SSimon Glass .id = UCLASS_ROOT, 1186494d708SSimon Glass }; 119