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cmd/bind.c
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49c752c93 cmd: Add bind/unb... |
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// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2018 JJ Hiblot <jjhiblot@ti.com> */ #include <common.h> #include <dm.h> #include <dm/device-internal.h> #include <dm/lists.h> #include <dm/uclass-internal.h> static int bind_by_class_index(const char *uclass, int index, const char *drv_name) { static enum uclass_id uclass_id; struct udevice *dev; struct udevice *parent; int ret; struct driver *drv; drv = lists_driver_lookup_name(drv_name); if (!drv) { printf("Cannot find driver '%s' ", drv_name); return -ENOENT; } uclass_id = uclass_get_by_name(uclass); if (uclass_id == UCLASS_INVALID) { printf("%s is not a valid uclass ", uclass); return -EINVAL; } ret = uclass_find_device(uclass_id, index, &parent); if (!parent || ret) { printf("Cannot find device %d of class %s ", index, uclass); return ret; } ret = device_bind_with_driver_data(parent, drv, drv->name, 0, ofnode_null(), &dev); if (!dev || ret) { printf("Unable to bind. err:%d ", ret); return ret; } return 0; } static int find_dev(const char *uclass, int index, struct udevice **devp) { static enum uclass_id uclass_id; int rc; uclass_id = uclass_get_by_name(uclass); if (uclass_id == UCLASS_INVALID) { printf("%s is not a valid uclass ", uclass); return -EINVAL; } rc = uclass_find_device(uclass_id, index, devp); if (!*devp || rc) { printf("Cannot find device %d of class %s ", index, uclass); return rc; } return 0; } static int unbind_by_class_index(const char *uclass, int index) { int ret; struct udevice *dev; ret = find_dev(uclass, index, &dev); if (ret) return ret; ret = device_remove(dev, DM_REMOVE_NORMAL); if (ret) { printf("Unable to remove. err:%d ", ret); return ret; } ret = device_unbind(dev); if (ret) { printf("Unable to unbind. err:%d ", ret); return ret; } return 0; } static int unbind_child_by_class_index(const char *uclass, int index, const char *drv_name) { struct udevice *parent; int ret; struct driver *drv; drv = lists_driver_lookup_name(drv_name); if (!drv) { printf("Cannot find driver '%s' ", drv_name); return -ENOENT; } ret = find_dev(uclass, index, &parent); if (ret) return ret; ret = device_chld_remove(parent, drv, DM_REMOVE_NORMAL); if (ret) printf("Unable to remove all. err:%d ", ret); ret = device_chld_unbind(parent, drv); if (ret) printf("Unable to unbind all. err:%d ", ret); return ret; } static int bind_by_node_path(const char *path, const char *drv_name) { struct udevice *dev; struct udevice *parent = NULL; int ret; ofnode ofnode; struct driver *drv; drv = lists_driver_lookup_name(drv_name); if (!drv) { printf("%s is not a valid driver name ", drv_name); return -ENOENT; } ofnode = ofnode_path(path); if (!ofnode_valid(ofnode)) { printf("%s is not a valid node path ", path); return -EINVAL; } while (ofnode_valid(ofnode)) { if (!device_find_global_by_ofnode(ofnode, &parent)) break; ofnode = ofnode_get_parent(ofnode); } if (!parent) { printf("Cannot find a parent device for node path %s ", path); return -ENODEV; } ofnode = ofnode_path(path); ret = device_bind_with_driver_data(parent, drv, ofnode_get_name(ofnode), 0, ofnode, &dev); if (!dev || ret) { printf("Unable to bind. err:%d ", ret); return ret; } return 0; } static int unbind_by_node_path(const char *path) { struct udevice *dev; int ret; ofnode ofnode; ofnode = ofnode_path(path); if (!ofnode_valid(ofnode)) { printf("%s is not a valid node path ", path); return -EINVAL; } ret = device_find_global_by_ofnode(ofnode, &dev); if (!dev || ret) { printf("Cannot find a device with path %s ", path); return -ENODEV; } ret = device_remove(dev, DM_REMOVE_NORMAL); if (ret) { printf("Unable to remove. err:%d ", ret); return ret; } ret = device_unbind(dev); if (ret) { printf("Unable to unbind. err:%d ", ret); return ret; } return 0; } static int do_bind_unbind(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { int ret = 0; bool bind; bool by_node; if (argc < 2) return CMD_RET_USAGE; bind = (argv[0][0] == 'b'); by_node = (argv[1][0] == '/'); if (by_node && bind) { if (argc != 3) return CMD_RET_USAGE; ret = bind_by_node_path(argv[1], argv[2]); } else if (by_node && !bind) { if (argc != 2) return CMD_RET_USAGE; ret = unbind_by_node_path(argv[1]); } else if (!by_node && bind) { int index = (argc > 2) ? simple_strtoul(argv[2], NULL, 10) : 0; if (argc != 4) return CMD_RET_USAGE; ret = bind_by_class_index(argv[1], index, argv[3]); } else if (!by_node && !bind) { int index = (argc > 2) ? simple_strtoul(argv[2], NULL, 10) : 0; if (argc == 3) ret = unbind_by_class_index(argv[1], index); else if (argc == 4) ret = unbind_child_by_class_index(argv[1], index, argv[3]); else return CMD_RET_USAGE; } if (ret) return CMD_RET_FAILURE; else return CMD_RET_SUCCESS; } U_BOOT_CMD( bind, 4, 0, do_bind_unbind, "Bind a device to a driver", "<node path> <driver> " "bind <class> <index> <driver> " ); U_BOOT_CMD( unbind, 4, 0, do_bind_unbind, "Unbind a device from a driver", "<node path> " "unbind <class> <index> " "unbind <class> <index> <driver> " ); |