1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/usb/composite.h>
24 		return -EINVAL;  in check_user_usb_string()
26 	stringtab_dev->language = num;  in check_user_usb_string()
47 	struct usb_composite_driver composite;  member
109 		return -EOVERFLOW;  in usb_string_copy()
116 			return -ENOMEM;  in usb_string_copy()
119 	if (str[ret - 1] == '\n')  in usb_string_copy()
120 		str[ret - 1] = '\0';  in usb_string_copy()
130 		to_gadget_info(item)->cdev.desc.__name); \
138 		le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \
151 	to_gadget_info(item)->cdev.desc._name = val;	\
164 	to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val);	\
184 		return -EINVAL;  in is_valid_bcd()
186 		return -EINVAL;  in is_valid_bcd()
188 		return -EINVAL;  in is_valid_bcd()
190 		return -EINVAL;  in is_valid_bcd()
207 	to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice);  in gadget_dev_desc_bcdDevice_store()
224 	to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB);  in gadget_dev_desc_bcdUSB_store()
234 	mutex_lock(&gi->lock);  in gadget_dev_desc_UDC_show()
235 	udc_name = gi->composite.gadget_driver.udc_name;  in gadget_dev_desc_UDC_show()
237 	mutex_unlock(&gi->lock);  in gadget_dev_desc_UDC_show()
246 	if (!gi->composite.gadget_driver.udc_name)  in unregister_gadget()
247 		return -ENODEV;  in unregister_gadget()
249 	ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver);  in unregister_gadget()
252 	kfree(gi->composite.gadget_driver.udc_name);  in unregister_gadget()
253 	gi->composite.gadget_driver.udc_name = NULL;  in unregister_gadget()
265 		return -EOVERFLOW;  in gadget_dev_desc_UDC_store()
269 		return -ENOMEM;  in gadget_dev_desc_UDC_store()
270 	if (name[len - 1] == '\n')  in gadget_dev_desc_UDC_store()
271 		name[len - 1] = '\0';  in gadget_dev_desc_UDC_store()
273 	mutex_lock(&gi->lock);  in gadget_dev_desc_UDC_store()
281 		if (gi->composite.gadget_driver.udc_name) {  in gadget_dev_desc_UDC_store()
282 			ret = -EBUSY;  in gadget_dev_desc_UDC_store()
285 		gi->composite.gadget_driver.udc_name = name;  in gadget_dev_desc_UDC_store()
286 		ret = usb_gadget_probe_driver(&gi->composite.gadget_driver);  in gadget_dev_desc_UDC_store()
288 			gi->composite.gadget_driver.udc_name = NULL;  in gadget_dev_desc_UDC_store()
292 	mutex_unlock(&gi->lock);  in gadget_dev_desc_UDC_store()
296 	mutex_unlock(&gi->lock);  in gadget_dev_desc_UDC_store()
303 	enum usb_device_speed speed = to_gadget_info(item)->composite.max_speed;  in gadget_dev_desc_max_speed_show()
313 	mutex_lock(&gi->lock);  in gadget_dev_desc_max_speed_store()
316 	if (gi->composite.gadget_driver.udc_name)  in gadget_dev_desc_max_speed_store()
319 	if (strncmp(page, "super-speed-plus", 16) == 0)  in gadget_dev_desc_max_speed_store()
320 		gi->composite.max_speed = USB_SPEED_SUPER_PLUS;  in gadget_dev_desc_max_speed_store()
321 	else if (strncmp(page, "super-speed", 11) == 0)  in gadget_dev_desc_max_speed_store()
322 		gi->composite.max_speed = USB_SPEED_SUPER;  in gadget_dev_desc_max_speed_store()
323 	else if (strncmp(page, "high-speed", 10) == 0)  in gadget_dev_desc_max_speed_store()
324 		gi->composite.max_speed = USB_SPEED_HIGH;  in gadget_dev_desc_max_speed_store()
325 	else if (strncmp(page, "full-speed", 10) == 0)  in gadget_dev_desc_max_speed_store()
326 		gi->composite.max_speed = USB_SPEED_FULL;  in gadget_dev_desc_max_speed_store()
327 	else if (strncmp(page, "low-speed", 9) == 0)  in gadget_dev_desc_max_speed_store()
328 		gi->composite.max_speed = USB_SPEED_LOW;  in gadget_dev_desc_max_speed_store()
332 	gi->composite.gadget_driver.max_speed = gi->composite.max_speed;  in gadget_dev_desc_max_speed_store()
334 	mutex_unlock(&gi->lock);  in gadget_dev_desc_max_speed_store()
337 	mutex_unlock(&gi->lock);  in gadget_dev_desc_max_speed_store()
338 	return -EINVAL;  in gadget_dev_desc_max_speed_store()
390 	WARN_ON(!list_empty(&gi->cdev.configs));  in gadget_info_attr_release()
391 	WARN_ON(!list_empty(&gi->string_list));  in gadget_info_attr_release()
392 	WARN_ON(!list_empty(&gi->available_func));  in gadget_info_attr_release()
393 	kfree(gi->composite.gadget_driver.function);  in gadget_info_attr_release()
405 	WARN_ON(!list_empty(&cfg->c.functions));  in gadget_config_attr_release()
406 	list_del(&cfg->c.list);  in gadget_config_attr_release()
407 	kfree(cfg->c.label);  in gadget_config_attr_release()
416 	struct usb_composite_dev *cdev = cfg->c.cdev;  in config_usb_cfg_link()
426 	mutex_lock(&gi->lock);  in config_usb_cfg_link()
432 	list_for_each_entry(a_fi, &gi->available_func, cfs_list) {  in config_usb_cfg_link()
437 		ret = -EINVAL;  in config_usb_cfg_link()
441 	list_for_each_entry(f, &cfg->func_list, list) {  in config_usb_cfg_link()
442 		if (f->fi == fi) {  in config_usb_cfg_link()
443 			ret = -EEXIST;  in config_usb_cfg_link()
455 	list_add_tail(&f->list, &cfg->func_list);  in config_usb_cfg_link()
458 	mutex_unlock(&gi->lock);  in config_usb_cfg_link()
467 	struct usb_composite_dev *cdev = cfg->c.cdev;  in config_usb_cfg_unlink()
481 	mutex_lock(&gi->lock);  in config_usb_cfg_unlink()
482 	if (gi->composite.gadget_driver.udc_name)  in config_usb_cfg_unlink()
484 	WARN_ON(gi->composite.gadget_driver.udc_name);  in config_usb_cfg_unlink()
486 	list_for_each_entry(f, &cfg->func_list, list) {  in config_usb_cfg_unlink()
487 		if (f->fi == fi) {  in config_usb_cfg_unlink()
488 			list_del(&f->list);  in config_usb_cfg_unlink()
490 			mutex_unlock(&gi->lock);  in config_usb_cfg_unlink()
494 	mutex_unlock(&gi->lock);  in config_usb_cfg_unlink()
508 	return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower);  in gadget_config_desc_MaxPower_show()
520 		return -ERANGE;  in gadget_config_desc_MaxPower_store()
521 	to_config_usb_cfg(item)->c.MaxPower = val;  in gadget_config_desc_MaxPower_store()
529 		to_config_usb_cfg(item)->c.bmAttributes);  in gadget_config_desc_bmAttributes_show()
541 		return -EINVAL;  in gadget_config_desc_bmAttributes_store()
544 		return -EINVAL;  in gadget_config_desc_bmAttributes_store()
545 	to_config_usb_cfg(item)->c.bmAttributes = val;  in gadget_config_desc_bmAttributes_store()
572 	spin_lock_init(&cdev->lock);  in composite_init_dev()
573 	INIT_LIST_HEAD(&cdev->configs);  in composite_init_dev()
574 	INIT_LIST_HEAD(&cdev->gstrings);  in composite_init_dev()
590 		return ERR_PTR(-ENAMETOOLONG);  in function_make()
595 		pr_err("Unable to locate . in FUNC.INSTANCE\n");  in function_make()
596 		return ERR_PTR(-EINVAL);  in function_make()
605 	ret = config_item_set_name(&fi->group.cg_item, "%s", name);  in function_make()
610 	if (fi->set_inst_name) {  in function_make()
611 		ret = fi->set_inst_name(fi, instance_name);  in function_make()
620 	mutex_lock(&gi->lock);  in function_make()
621 	list_add_tail(&fi->cfs_list, &gi->available_func);  in function_make()
622 	mutex_unlock(&gi->lock);  in function_make()
623 	return &fi->group;  in function_make()
635 	mutex_lock(&gi->lock);  in function_drop()
636 	list_del(&fi->cfs_list);  in function_drop()
637 	mutex_unlock(&gi->lock);  in function_drop()
662 	kfree(cn->configuration);  in gadget_config_name_attr_release()
664 	list_del(&cn->list);  in gadget_config_name_attr_release()
685 		return ERR_PTR(-ENAMETOOLONG);  in config_desc_make()
689 		pr_err("Unable to locate . in name.bConfigurationValue\n");  in config_desc_make()
690 		return ERR_PTR(-EINVAL);  in config_desc_make()
697 		return ERR_PTR(-EINVAL);  in config_desc_make()
705 		return ERR_PTR(-ENOMEM);  in config_desc_make()
706 	cfg->c.label = kstrdup(buf, GFP_KERNEL);  in config_desc_make()
707 	if (!cfg->c.label) {  in config_desc_make()
708 		ret = -ENOMEM;  in config_desc_make()
711 	cfg->c.bConfigurationValue = num;  in config_desc_make()
712 	cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW;  in config_desc_make()
713 	cfg->c.bmAttributes = USB_CONFIG_ATT_ONE;  in config_desc_make()
714 	INIT_LIST_HEAD(&cfg->string_list);  in config_desc_make()
715 	INIT_LIST_HEAD(&cfg->func_list);  in config_desc_make()
717 	config_group_init_type_name(&cfg->group, name,  in config_desc_make()
720 	config_group_init_type_name(&cfg->strings_group, "strings",  in config_desc_make()
722 	configfs_add_default_group(&cfg->strings_group, &cfg->group);  in config_desc_make()
724 	ret = usb_add_config_only(&gi->cdev, &cfg->c);  in config_desc_make()
728 	return &cfg->group;  in config_desc_make()
730 	kfree(cfg->c.label);  in config_desc_make()
767 	kfree(gs->manufacturer);  in gadget_strings_attr_release()
768 	kfree(gs->product);  in gadget_strings_attr_release()
769 	kfree(gs->serialnumber);  in gadget_strings_attr_release()
771 	list_del(&gs->list);  in gadget_strings_attr_release()
786 	return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent);  in os_desc_item_to_gadget_info()
792 			os_desc_item_to_gadget_info(item)->use_os_desc);  in os_desc_use_show()
802 	mutex_lock(&gi->lock);  in os_desc_use_store()
805 		gi->use_os_desc = use;  in os_desc_use_store()
808 	mutex_unlock(&gi->lock);  in os_desc_use_store()
816 			os_desc_item_to_gadget_info(item)->b_vendor_code);  in os_desc_b_vendor_code_show()
826 	mutex_lock(&gi->lock);  in os_desc_b_vendor_code_store()
829 		gi->b_vendor_code = b_vendor_code;  in os_desc_b_vendor_code_store()
832 	mutex_unlock(&gi->lock);  in os_desc_b_vendor_code_store()
842 	res = utf16s_to_utf8s((wchar_t *) gi->qw_sign, OS_STRING_QW_SIGN_LEN,  in os_desc_qw_sign_show()
843 			      UTF16_LITTLE_ENDIAN, page, PAGE_SIZE - 1);  in os_desc_qw_sign_show()
856 	if (page[l - 1] == '\n')  in os_desc_qw_sign_store()
857 		--l;  in os_desc_qw_sign_store()
859 	mutex_lock(&gi->lock);  in os_desc_qw_sign_store()
861 			      UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign,  in os_desc_qw_sign_store()
865 	mutex_unlock(&gi->lock);  in os_desc_qw_sign_store()
892 	struct usb_composite_dev *cdev = &gi->cdev;  in os_desc_link()
899 	mutex_lock(&gi->lock);  in os_desc_link()
900 	list_for_each_entry(c, &cdev->configs, list) {  in os_desc_link()
901 		if (c == &c_target->c)  in os_desc_link()
904 	if (c != &c_target->c) {  in os_desc_link()
905 		ret = -EINVAL;  in os_desc_link()
909 	if (cdev->os_desc_config) {  in os_desc_link()
910 		ret = -EBUSY;  in os_desc_link()
914 	cdev->os_desc_config = &c_target->c;  in os_desc_link()
918 	mutex_unlock(&gi->lock);  in os_desc_link()
927 	struct usb_composite_dev *cdev = &gi->cdev;  in os_desc_unlink()
929 	mutex_lock(&gi->lock);  in os_desc_unlink()
930 	if (gi->composite.gadget_driver.udc_name)  in os_desc_unlink()
932 	cdev->os_desc_config = NULL;  in os_desc_unlink()
933 	WARN_ON(gi->composite.gadget_driver.udc_name);  in os_desc_unlink()
934 	mutex_unlock(&gi->lock);  in os_desc_unlink()
957 	return sprintf(page, "%d\n", to_usb_os_desc_ext_prop(item)->type);  in ext_prop_type_show()
964 	struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent);  in ext_prop_type_store()
968 	if (desc->opts_mutex)  in ext_prop_type_store()
969 		mutex_lock(desc->opts_mutex);  in ext_prop_type_store()
974 		ret = -EINVAL;  in ext_prop_type_store()
978 	if ((ext_prop->type == USB_EXT_PROP_BINARY ||  in ext_prop_type_store()
979 	    ext_prop->type == USB_EXT_PROP_LE32 ||  in ext_prop_type_store()
980 	    ext_prop->type == USB_EXT_PROP_BE32) &&  in ext_prop_type_store()
984 		ext_prop->data_len <<= 1;  in ext_prop_type_store()
985 	else if ((ext_prop->type == USB_EXT_PROP_UNICODE ||  in ext_prop_type_store()
986 		   ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||  in ext_prop_type_store()
987 		   ext_prop->type == USB_EXT_PROP_UNICODE_LINK) &&  in ext_prop_type_store()
991 		ext_prop->data_len >>= 1;  in ext_prop_type_store()
992 	ext_prop->type = type;  in ext_prop_type_store()
996 	if (desc->opts_mutex)  in ext_prop_type_store()
997 		mutex_unlock(desc->opts_mutex);  in ext_prop_type_store()
1004 	int len = ext_prop->data_len;  in ext_prop_data_show()
1006 	if (ext_prop->type == USB_EXT_PROP_UNICODE ||  in ext_prop_data_show()
1007 	    ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||  in ext_prop_data_show()
1008 	    ext_prop->type == USB_EXT_PROP_UNICODE_LINK)  in ext_prop_data_show()
1010 	memcpy(page, ext_prop->data, len);  in ext_prop_data_show()
1019 	struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent);  in ext_prop_data_store()
1023 	if (page[len - 1] == '\n' || page[len - 1] == '\0')  in ext_prop_data_store()
1024 		--len;  in ext_prop_data_store()
1027 		return -ENOMEM;  in ext_prop_data_store()
1029 	if (desc->opts_mutex)  in ext_prop_data_store()
1030 		mutex_lock(desc->opts_mutex);  in ext_prop_data_store()
1031 	kfree(ext_prop->data);  in ext_prop_data_store()
1032 	ext_prop->data = new_data;  in ext_prop_data_store()
1033 	desc->ext_prop_len -= ext_prop->data_len;  in ext_prop_data_store()
1034 	ext_prop->data_len = len;  in ext_prop_data_store()
1035 	desc->ext_prop_len += ext_prop->data_len;  in ext_prop_data_store()
1036 	if (ext_prop->type == USB_EXT_PROP_UNICODE ||  in ext_prop_data_store()
1037 	    ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||  in ext_prop_data_store()
1038 	    ext_prop->type == USB_EXT_PROP_UNICODE_LINK) {  in ext_prop_data_store()
1039 		desc->ext_prop_len -= ext_prop->data_len;  in ext_prop_data_store()
1040 		ext_prop->data_len <<= 1;  in ext_prop_data_store()
1041 		ext_prop->data_len += 2;  in ext_prop_data_store()
1042 		desc->ext_prop_len += ext_prop->data_len;  in ext_prop_data_store()
1044 	if (desc->opts_mutex)  in ext_prop_data_store()
1045 		mutex_unlock(desc->opts_mutex);  in ext_prop_data_store()
1084 		return ERR_PTR(-ENOMEM);  in ext_prop_make()
1090 	ext_prop_type->ct_item_ops = &ext_prop_ops;  in ext_prop_make()
1091 	ext_prop_type->ct_attrs = ext_prop_attrs;  in ext_prop_make()
1092 	ext_prop_type->ct_owner = desc->owner;  in ext_prop_make()
1094 	config_item_init_type_name(&ext_prop->item, name, ext_prop_type);  in ext_prop_make()
1096 	ext_prop->name = kstrdup(name, GFP_KERNEL);  in ext_prop_make()
1097 	if (!ext_prop->name) {  in ext_prop_make()
1099 		return ERR_PTR(-ENOMEM);  in ext_prop_make()
1101 	desc->ext_prop_len += 14;  in ext_prop_make()
1102 	ext_prop->name_len = 2 * strlen(ext_prop->name) + 2;  in ext_prop_make()
1103 	if (desc->opts_mutex)  in ext_prop_make()
1104 		mutex_lock(desc->opts_mutex);  in ext_prop_make()
1105 	desc->ext_prop_len += ext_prop->name_len;  in ext_prop_make()
1106 	list_add_tail(&ext_prop->entry, &desc->ext_prop);  in ext_prop_make()
1107 	++desc->ext_prop_count;  in ext_prop_make()
1108 	if (desc->opts_mutex)  in ext_prop_make()
1109 		mutex_unlock(desc->opts_mutex);  in ext_prop_make()
1111 	return &ext_prop->item;  in ext_prop_make()
1117 	struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item);  in ext_prop_drop()
1119 	if (desc->opts_mutex)  in ext_prop_drop()
1120 		mutex_lock(desc->opts_mutex);  in ext_prop_drop()
1121 	list_del(&ext_prop->entry);  in ext_prop_drop()
1122 	--desc->ext_prop_count;  in ext_prop_drop()
1123 	kfree(ext_prop->name);  in ext_prop_drop()
1124 	desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14);  in ext_prop_drop()
1125 	if (desc->opts_mutex)  in ext_prop_drop()
1126 		mutex_unlock(desc->opts_mutex);  in ext_prop_drop()
1138 	memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8);  in interf_grp_compatible_id_show()
1149 	if (page[l - 1] == '\n')  in interf_grp_compatible_id_store()
1150 		--l;  in interf_grp_compatible_id_store()
1151 	if (desc->opts_mutex)  in interf_grp_compatible_id_store()
1152 		mutex_lock(desc->opts_mutex);  in interf_grp_compatible_id_store()
1153 	memcpy(desc->ext_compat_id, page, l);  in interf_grp_compatible_id_store()
1155 	if (desc->opts_mutex)  in interf_grp_compatible_id_store()
1156 		mutex_unlock(desc->opts_mutex);  in interf_grp_compatible_id_store()
1164 	memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8);  in interf_grp_sub_compatible_id_show()
1175 	if (page[l - 1] == '\n')  in interf_grp_sub_compatible_id_store()
1176 		--l;  in interf_grp_sub_compatible_id_store()
1177 	if (desc->opts_mutex)  in interf_grp_sub_compatible_id_store()
1178 		mutex_lock(desc->opts_mutex);  in interf_grp_sub_compatible_id_store()
1179 	memcpy(desc->ext_compat_id + 8, page, l);  in interf_grp_sub_compatible_id_store()
1181 	if (desc->opts_mutex)  in interf_grp_sub_compatible_id_store()
1182 		mutex_unlock(desc->opts_mutex);  in interf_grp_sub_compatible_id_store()
1213 		return ERR_PTR(-ENOMEM);  in usb_os_desc_prepare_interf_dir()
1219 	os_desc_type->ct_owner = owner;  in usb_os_desc_prepare_interf_dir()
1223 	interface_type->ct_group_ops = &interf_grp_ops;  in usb_os_desc_prepare_interf_dir()
1224 	interface_type->ct_attrs = interf_grp_attrs;  in usb_os_desc_prepare_interf_dir()
1225 	interface_type->ct_owner = owner;  in usb_os_desc_prepare_interf_dir()
1227 	while (n_interf--) {  in usb_os_desc_prepare_interf_dir()
1231 		d->owner = owner;  in usb_os_desc_prepare_interf_dir()
1232 		config_group_init_type_name(&d->group, "", interface_type);  in usb_os_desc_prepare_interf_dir()
1233 		config_item_set_name(&d->group.cg_item, "interface.%s",  in usb_os_desc_prepare_interf_dir()
1235 		configfs_add_default_group(&d->group, os_desc_group);  in usb_os_desc_prepare_interf_dir()
1245 	return -EINVAL;  in configfs_do_nothing()
1248 int composite_dev_prepare(struct usb_composite_driver *composite,
1258 	list_for_each_entry(c, &gi->cdev.configs, list) {  in purge_configs_funcs()
1264 		list_for_each_entry_safe_reverse(f, tmp, &c->functions, list) {  in purge_configs_funcs()
1266 			list_move(&f->list, &cfg->func_list);  in purge_configs_funcs()
1267 			if (f->unbind) {  in purge_configs_funcs()
1268 				dev_dbg(&gi->cdev.gadget->dev,  in purge_configs_funcs()
1270 					f->name, f);  in purge_configs_funcs()
1271 				f->unbind(c, f);  in purge_configs_funcs()
1274 		c->next_interface_id = 0;  in purge_configs_funcs()
1275 		memset(c->interface, 0, sizeof(c->interface));  in purge_configs_funcs()
1276 		c->superspeed_plus = 0;  in purge_configs_funcs()
1277 		c->superspeed = 0;  in purge_configs_funcs()
1278 		c->highspeed = 0;  in purge_configs_funcs()
1279 		c->fullspeed = 0;  in purge_configs_funcs()
1286 	struct usb_composite_driver     *composite = to_cdriver(gdriver);  in configfs_composite_bind()  local
1287 	struct gadget_info		*gi = container_of(composite,  in configfs_composite_bind()
1288 						struct gadget_info, composite);  in configfs_composite_bind()
1289 	struct usb_composite_dev	*cdev = &gi->cdev;  in configfs_composite_bind()
1295 	/* the gi->lock is hold by the caller */  in configfs_composite_bind()
1296 	gi->unbind = 0;  in configfs_composite_bind()
1297 	cdev->gadget = gadget;  in configfs_composite_bind()
1299 	ret = composite_dev_prepare(composite, cdev);  in configfs_composite_bind()
1303 	ret = -EINVAL;  in configfs_composite_bind()
1305 	if (list_empty(&gi->cdev.configs)) {  in configfs_composite_bind()
1306 		pr_err("Need at least one configuration in %s.\n",  in configfs_composite_bind()
1307 				gi->composite.name);  in configfs_composite_bind()
1312 	list_for_each_entry(c, &gi->cdev.configs, list) {  in configfs_composite_bind()
1316 		if (list_empty(&cfg->func_list)) {  in configfs_composite_bind()
1318 			      c->label, c->bConfigurationValue,  in configfs_composite_bind()
1319 			      gi->composite.name);  in configfs_composite_bind()
1325 	if (!list_empty(&gi->string_list)) {  in configfs_composite_bind()
1329 		list_for_each_entry(gs, &gi->string_list, list) {  in configfs_composite_bind()
1331 			gi->gstrings[i] = &gs->stringtab_dev;  in configfs_composite_bind()
1332 			gs->stringtab_dev.strings = gs->strings;  in configfs_composite_bind()
1333 			gs->strings[USB_GADGET_MANUFACTURER_IDX].s =  in configfs_composite_bind()
1334 				gs->manufacturer;  in configfs_composite_bind()
1335 			gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product;  in configfs_composite_bind()
1336 			gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber;  in configfs_composite_bind()
1339 		gi->gstrings[i] = NULL;  in configfs_composite_bind()
1340 		s = usb_gstrings_attach(&gi->cdev, gi->gstrings,  in configfs_composite_bind()
1347 		gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id;  in configfs_composite_bind()
1348 		gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id;  in configfs_composite_bind()
1349 		gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id;  in configfs_composite_bind()
1352 	if (gi->use_os_desc) {  in configfs_composite_bind()
1353 		cdev->use_os_string = true;  in configfs_composite_bind()
1354 		cdev->b_vendor_code = gi->b_vendor_code;  in configfs_composite_bind()
1355 		memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN);  in configfs_composite_bind()
1363 			ret = -ENOMEM;  in configfs_composite_bind()
1372 	list_for_each_entry(c, &gi->cdev.configs, list) {  in configfs_composite_bind()
1379 			c->descriptors = otg_desc;  in configfs_composite_bind()
1382 		if (!list_empty(&cfg->string_list)) {  in configfs_composite_bind()
1384 			list_for_each_entry(cn, &cfg->string_list, list) {  in configfs_composite_bind()
1385 				cfg->gstrings[i] = &cn->stringtab_dev;  in configfs_composite_bind()
1386 				cn->stringtab_dev.strings = &cn->strings;  in configfs_composite_bind()
1387 				cn->strings.s = cn->configuration;  in configfs_composite_bind()
1390 			cfg->gstrings[i] = NULL;  in configfs_composite_bind()
1391 			s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1);  in configfs_composite_bind()
1396 			c->iConfiguration = s[0].id;  in configfs_composite_bind()
1399 		list_for_each_entry_safe(f, tmp, &cfg->func_list, list) {  in configfs_composite_bind()
1400 			list_del(&f->list);  in configfs_composite_bind()
1403 				list_add(&f->list, &cfg->func_list);  in configfs_composite_bind()
1407 		ret = usb_gadget_check_config(cdev->gadget);  in configfs_composite_bind()
1411 		usb_ep_autoconfig_reset(cdev->gadget);  in configfs_composite_bind()
1413 	if (cdev->use_os_string) {  in configfs_composite_bind()
1414 		ret = composite_os_desc_req_prepare(cdev, gadget->ep0);  in configfs_composite_bind()
1419 	usb_ep_autoconfig_reset(cdev->gadget);  in configfs_composite_bind()
1435 	/* the gi->lock is hold by the caller */  in configfs_composite_unbind()
1439 	spin_lock_irqsave(&gi->spinlock, flags);  in configfs_composite_unbind()
1440 	gi->unbind = 1;  in configfs_composite_unbind()
1441 	spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_unbind()
1447 	usb_ep_autoconfig_reset(cdev->gadget);  in configfs_composite_unbind()
1448 	spin_lock_irqsave(&gi->spinlock, flags);  in configfs_composite_unbind()
1449 	cdev->gadget = NULL;  in configfs_composite_unbind()
1451 	spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_unbind()
1467 	spin_lock_irqsave(&gi->spinlock, flags);  in configfs_composite_setup()
1469 	if (!cdev || gi->unbind) {  in configfs_composite_setup()
1470 		spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_setup()
1475 	spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_setup()
1490 	spin_lock_irqsave(&gi->spinlock, flags);  in configfs_composite_disconnect()
1492 	if (!cdev || gi->unbind) {  in configfs_composite_disconnect()
1493 		spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_disconnect()
1498 	spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_disconnect()
1512 	spin_lock_irqsave(&gi->spinlock, flags);  in configfs_composite_reset()
1514 	if (!cdev || gi->unbind) {  in configfs_composite_reset()
1515 		spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_reset()
1520 	spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_reset()
1534 	spin_lock_irqsave(&gi->spinlock, flags);  in configfs_composite_suspend()
1536 	if (!cdev || gi->unbind) {  in configfs_composite_suspend()
1537 		spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_suspend()
1542 	spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_suspend()
1556 	spin_lock_irqsave(&gi->spinlock, flags);  in configfs_composite_resume()
1558 	if (!cdev || gi->unbind) {  in configfs_composite_resume()
1559 		spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_resume()
1564 	spin_unlock_irqrestore(&gi->spinlock, flags);  in configfs_composite_resume()
1581 		.name		= "configfs-gadget",
1594 		return ERR_PTR(-ENOMEM);  in gadgets_make()
1596 	config_group_init_type_name(&gi->group, name, &gadget_root_type);  in gadgets_make()
1598 	config_group_init_type_name(&gi->functions_group, "functions",  in gadgets_make()
1600 	configfs_add_default_group(&gi->functions_group, &gi->group);  in gadgets_make()
1602 	config_group_init_type_name(&gi->configs_group, "configs",  in gadgets_make()
1604 	configfs_add_default_group(&gi->configs_group, &gi->group);  in gadgets_make()
1606 	config_group_init_type_name(&gi->strings_group, "strings",  in gadgets_make()
1608 	configfs_add_default_group(&gi->strings_group, &gi->group);  in gadgets_make()
1610 	config_group_init_type_name(&gi->os_desc_group, "os_desc",  in gadgets_make()
1612 	configfs_add_default_group(&gi->os_desc_group, &gi->group);  in gadgets_make()
1614 	gi->composite.bind = configfs_do_nothing;  in gadgets_make()
1615 	gi->composite.unbind = configfs_do_nothing;  in gadgets_make()
1616 	gi->composite.suspend = NULL;  in gadgets_make()
1617 	gi->composite.resume = NULL;  in gadgets_make()
1618 	gi->composite.max_speed = USB_SPEED_SUPER_PLUS;  in gadgets_make()
1620 	spin_lock_init(&gi->spinlock);  in gadgets_make()
1621 	mutex_init(&gi->lock);  in gadgets_make()
1622 	INIT_LIST_HEAD(&gi->string_list);  in gadgets_make()
1623 	INIT_LIST_HEAD(&gi->available_func);  in gadgets_make()
1625 	composite_init_dev(&gi->cdev);  in gadgets_make()
1626 	gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE;  in gadgets_make()
1627 	gi->cdev.desc.bDescriptorType = USB_DT_DEVICE;  in gadgets_make()
1628 	gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice());  in gadgets_make()
1630 	gi->composite.gadget_driver = configfs_driver_template;  in gadgets_make()
1632 	gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL);  in gadgets_make()
1633 	gi->composite.name = gi->composite.gadget_driver.function;  in gadgets_make()
1635 	if (!gi->composite.gadget_driver.function)  in gadgets_make()
1638 	return &gi->group;  in gadgets_make()
1641 	return ERR_PTR(-ENOMEM);  in gadgets_make()
1673 	mutex_lock(&gi->lock);  in unregister_gadget_item()
1675 	mutex_unlock(&gi->lock);  in unregister_gadget_item()