diff options
Diffstat (limited to 'roms/u-boot/cmd/bind.c')
| -rw-r--r-- | roms/u-boot/cmd/bind.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/roms/u-boot/cmd/bind.c b/roms/u-boot/cmd/bind.c new file mode 100644 index 000000000..af2f22cc4 --- /dev/null +++ b/roms/u-boot/cmd/bind.c @@ -0,0 +1,257 @@ +// 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" +); |