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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2018 JJ Hiblot <jjhiblot@ti.com>
- */
- #include <common.h>
- #include <command.h>
- #include <dm.h>
- #include <dm/device-internal.h>
- #include <dm/lists.h>
- #include <dm/root.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'\n", drv_name);
- return -ENOENT;
- }
- uclass_id = uclass_get_by_name(uclass);
- if (uclass_id == UCLASS_INVALID) {
- printf("%s is not a valid uclass\n", uclass);
- return -EINVAL;
- }
- ret = uclass_find_device(uclass_id, index, &parent);
- if (!parent || ret) {
- printf("Cannot find device %d of class %s\n", 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\n", 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\n", uclass);
- return -EINVAL;
- }
- rc = uclass_find_device(uclass_id, index, devp);
- if (!*devp || rc) {
- printf("Cannot find device %d of class %s\n", 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\n", ret);
- return ret;
- }
- ret = device_unbind(dev);
- if (ret) {
- printf("Unable to unbind. err:%d\n", 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'\n", 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\n", ret);
- ret = device_chld_unbind(parent, drv);
- if (ret)
- printf("Unable to unbind all. err:%d\n", 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\n", drv_name);
- return -ENOENT;
- }
- ofnode = ofnode_path(path);
- if (!ofnode_valid(ofnode)) {
- printf("%s is not a valid node path\n", 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\n", path);
- return -ENODEV;
- }
- ofnode = ofnode_path(path);
- ret = lists_bind_fdt(parent, ofnode, &dev, false);
- if (!dev || ret) {
- printf("Unable to bind. err:%d\n", 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\n", path);
- return -EINVAL;
- }
- ret = device_find_global_by_ofnode(ofnode, &dev);
- if (!dev || ret) {
- printf("Cannot find a device with path %s\n", path);
- return -ENODEV;
- }
- ret = device_remove(dev, DM_REMOVE_NORMAL);
- if (ret) {
- printf("Unable to remove. err:%d\n", ret);
- return ret;
- }
- ret = device_unbind(dev);
- if (ret) {
- printf("Unable to unbind. err:%d\n", ret);
- return ret;
- }
- return 0;
- }
- static int do_bind_unbind(struct cmd_tbl *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>\n"
- "bind <class> <index> <driver>\n"
- );
- U_BOOT_CMD(
- unbind, 4, 0, do_bind_unbind,
- "Unbind a device from a driver",
- "<node path>\n"
- "unbind <class> <index>\n"
- "unbind <class> <index> <driver>\n"
- );
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