From: Youngjae Cho Date: Tue, 12 Apr 2022 00:24:59 +0000 (-0700) Subject: usb-gadget: move usb-gadget to deviced X-Git-Tag: accepted/tizen/7.0/unified/20221110.062442^0 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=refs%2Fheads%2Faccepted%2Ftizen_7.0_unified_hotfix;p=platform%2Fhal%2Fbackend%2Fdevice-common.git usb-gadget: move usb-gadget to deviced Change-Id: I50188a374b64bf8e388668295756456f4afa7bbc Signed-off-by: Youngjae Cho --- diff --git a/CMakeLists.txt b/CMakeLists.txt index 2a9ed4d..305621a 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -4,9 +4,6 @@ PROJECT(hal-backend-device-common C) INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/include) SET(SRCS - src/usb_gadget/usb_gadget_common.c - src/usb_gadget/usb_client_common.c - src/usb_gadget/usb_cfs_client_common.c src/udev/udev.c ) @@ -32,7 +29,6 @@ TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${hal-backend-device-common_pkgs_LDFLAGS}) INSTALL(TARGETS ${PROJECT_NAME} DESTINATION ${HAL_LIB_DIR} COMPONENT RuntimeLibraries) INSTALL(FILES ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE.Apache-2.0 DESTINATION ${HAL_LICENSE_DIR}/${PROJECT_NAME}) -INSTALL(FILES ${CMAKE_CURRENT_SOURCE_DIR}/include/hal-backend-common-usb_gadget.h DESTINATION ${HAL_INCLUDE_DIR}/device) INSTALL(FILES ${CMAKE_CURRENT_SOURCE_DIR}/include/hal-backend-common.h DESTINATION ${HAL_INCLUDE_DIR}/device) INSTALL(FILES ${CMAKE_CURRENT_SOURCE_DIR}/include/hal-backend-common-udev.h DESTINATION ${HAL_INCLUDE_DIR}/device) diff --git a/include/hal-backend-common-usb_gadget.h b/include/hal-backend-common-usb_gadget.h deleted file mode 100644 index fd5f7f0..0000000 --- a/include/hal-backend-common-usb_gadget.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Copyright (c) 2021 Samsung Electronics Co., Ltd All Rights Reserved - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - - -#ifndef __HAL_BACKEND_COMMON_USB_GADGET_H__ -#define __HAL_BACKEND_COMMON_USB_GADGET_H__ - -#include - -#ifdef __cplusplus -extern "C" { -#endif - -int simple_translator_open(hal_backend_usb_gadget_funcs *usb_gadget_funcs); -int simple_translator_close(hal_backend_usb_gadget_funcs *usb_gadget_funcs); - -int hw_legacy_gadget_open(hal_backend_usb_gadget_funcs *usb_gadget_funcs); -int hw_legacy_gadget_close(hal_backend_usb_gadget_funcs *usb_gadget_funcs); - -int hw_cfs_gadget_open(hal_backend_usb_gadget_funcs *usb_gadget_funcs); -int hw_cfs_gadget_close(hal_backend_usb_gadget_funcs *usb_gadget_funcs); - -#ifdef __cplusplus -} -#endif -#endif /* __HAL_BACKEND_COMMON_USB_GADGET_H__ */ diff --git a/src/usb_gadget/usb_cfs_client_common.c b/src/usb_gadget/usb_cfs_client_common.c deleted file mode 100644 index 5f2f959..0000000 --- a/src/usb_gadget/usb_cfs_client_common.c +++ /dev/null @@ -1,637 +0,0 @@ -/* - * Copyright (c) 2018 Samsung Electronics Co., Ltd. - * - * Licensed under the Apache License, Version 2.0 (the License); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include -#include - -#include "usb_gadget.h" -#include "hal-backend-common.h" - -#define CONFIGFS_PATH "/sys/kernel/config" - -#define CONFIGFS_GADGET_NAME "hal-gadget" -#define CONFIGFS_CONFIG_LABEL "hal-config" - -#define NAME_INSTANCE_SEP '.' -#define MAX_INSTANCE_LEN 512 - -#define USB_FUNCS_PATH "/dev/usb-funcs" - -enum cfs_function_service_operation { - CFS_FUNCTION_SERVICE_START, - CFS_FUNCTION_SERVICE_STOP, - CFS_FUNCTION_SERVICE_POST_STOP, -}; - -struct cfs_client { - usbg_state *ctx; - usbg_gadget *gadget; - usbg_udc *udc; -}; - -/* Based on values in slp-gadget kernel module */ -struct usbg_gadget_attrs default_g_attrs = { - .idVendor = DEFAULT_VID, - .idProduct = DEFAULT_PID, - .bcdDevice = DEFAULT_BCD_DEVICE, -}; - -struct usbg_gadget_strs default_g_strs = { - .manufacturer = DEFAULT_MANUFACTURER, - .product = DEFAULT_PRODUCT, - .serial = DEFAULT_SERIAL, -}; - -struct cfs_client *g_cfs_client; - -static struct usb_function *cfs_find_usb_function(usbg_function *function) -{ - char *sep; - char buf[MAX_INSTANCE_LEN]; - const char *instance = usbg_get_function_instance(function); - const char *name = usbg_get_function_type_str(usbg_get_function_type(function)); - - /* Ex. name:"ffs", instance: "sdb.default" */ - if (strcmp(name, usbg_get_function_type_str(USBG_F_FFS)) == 0) { - strncpy(buf, instance, sizeof(buf) - 1); - buf[sizeof(buf) - 1] = '\0'; - - /* Ex. "sdb.default" ==> "sdb" + "default" */ - sep = strchr(buf, NAME_INSTANCE_SEP); - if (!sep || !sep[1]) - return NULL; - *sep = '\0'; - - name = buf; - instance = sep + 1; - } - - return find_usb_function_by_name_instance(name, instance); -} - -static bool cfs_is_function_supported(struct usb_function *func) -{ - char buf[PATH_MAX]; - - if (func->is_functionfs) { - /* functionfs must have a service */ - if (!func->service) - return false; - - snprintf(buf, sizeof(buf), "/usr/lib/systemd/system/%s.socket", func->service); - if (access(buf, F_OK)) - return false; - } else { - if (usbg_lookup_function_type(func->name) < 0) - return false; - } - - return true; -} - -static bool cfs_is_gadget_supported(struct usb_gadget *gadget) -{ - int i, j; - struct usb_configuration *config; - - if (!gadget || !gadget->configs || !gadget->configs[0] || !gadget->configs[0]->funcs[0]) - return false; - - if (!gadget->attrs.idVendor || !gadget->attrs.idProduct || !gadget->attrs.bcdDevice) - return false; - - /* only strings in US_en are allowed */ - if (gadget->strs.lang_code != DEFAULT_LANG) - return false; - - if (!gadget->strs.manufacturer || !gadget->strs.product || !gadget->strs.serial) - return false; - - for (j = 0; gadget->configs[j]; ++j) { - config = gadget->configs[j]; - - if (!config->funcs) - return false; - - for (i = 0; config->funcs[i]; ++i) - if (!cfs_is_function_supported(config->funcs[i])) - return false; - } - - return true; -} - -static int cfs_set_gadget_attrs(struct cfs_client *cfs_client, - struct usb_gadget_attrs *attrs) -{ - int ret; - struct usbg_gadget_attrs gadget_attrs; - - ret = usbg_get_gadget_attrs(cfs_client->gadget, &gadget_attrs); - if (ret) - return ret; - - gadget_attrs.bDeviceClass = attrs->bDeviceClass; - gadget_attrs.bDeviceSubClass = attrs->bDeviceSubClass; - gadget_attrs.bDeviceProtocol = attrs->bDeviceProtocol; - gadget_attrs.idVendor = attrs->idVendor; - gadget_attrs.idProduct = attrs->idProduct; - gadget_attrs.bcdDevice = attrs->bcdDevice; - - ret = usbg_set_gadget_attrs(cfs_client->gadget, &gadget_attrs); - - return ret; -} - -static int cfs_set_gadget_strs(struct cfs_client *cfs_client, struct usb_gadget_strings *strs) -{ - int ret; - - if (!strs->manufacturer || !strs->product || !strs->serial) - return -EINVAL; - - ret = usbg_set_gadget_str(cfs_client->gadget, USBG_STR_MANUFACTURER, strs->lang_code, strs->manufacturer); - if (ret) - return ret; - - ret = usbg_set_gadget_str(cfs_client->gadget, USBG_STR_PRODUCT, strs->lang_code, strs->product); - if (ret) - return ret; - - ret = usbg_set_gadget_str(cfs_client->gadget, USBG_STR_SERIAL_NUMBER, strs->lang_code, strs->serial); - if (ret) - return ret; - - return 0; -} - -static int cfs_ensure_dir(char *path) -{ - if (mkdir(path, 0770) < 0) - return (errno == EEXIST) ? 0 : -errno; - - return 0; -} - - -static int cfs_prep_ffs_service(struct usb_function *usb_func, usbg_function *function) -{ - int ret; - const char *name; - const char *service; - const char *instance; - const char *dev_name; - char buf[MAX_INSTANCE_LEN]; - - if (!usb_func || !function) - return -EINVAL; - - if (usbg_get_function_type(function) != USBG_F_FFS) - return -EINVAL; - - name = usb_func->name; - service = usb_func->service; - instance = usb_func->instance; - dev_name = usbg_get_function_instance(function); - - /* "/dev/usb-funcs" + "/" + "sdb" + "/" + "default" + '0' */ - if (strlen(USB_FUNCS_PATH) + strlen(name) + strlen(instance) + 3 > sizeof(buf)) - return -ENAMETOOLONG; - - /* mkdir /dev/usb-funcs */ - ret = cfs_ensure_dir(USB_FUNCS_PATH); - if (ret < 0) - return ret; - - /* mkdir /dev/usb-funcs/sdb */ - snprintf(buf, sizeof(buf), "%s/%s", USB_FUNCS_PATH, name); - ret = cfs_ensure_dir(buf); - if (ret < 0) - goto out_rmdir; - - /* mkdir /dev/usb-funcs/sdb/default */ - snprintf(buf, sizeof(buf), "%s/%s/%s", USB_FUNCS_PATH, name, instance); - ret = cfs_ensure_dir(buf); - if (ret < 0) - goto out_rmdir; - - /* mount -t functionfs sdb.default /dev/usb-funcs/sdb/default */ - ret = mount(dev_name, buf, "functionfs", 0, NULL); - if (ret < 0) - goto out_rmdir; - - /* start sdbd.socket */ - ret = systemd_start_unit_wait_started(service, ".socket", -1); - if (ret < 0) - goto out_unmount; - - return 0; - -out_unmount: - umount(buf); - -out_rmdir: - snprintf(buf, sizeof(buf), "%s/%s/%s", USB_FUNCS_PATH, name, instance); - rmdir(buf); - - snprintf(buf, sizeof(buf), "%s/%s", USB_FUNCS_PATH, name); - rmdir(buf); - - rmdir(USB_FUNCS_PATH); - - return ret; -} - -static int cfs_cleanup_ffs_service(usbg_function *function) -{ - int ret; - char buf[MAX_INSTANCE_LEN]; - struct usb_function *usb_function; - - if (!function) - return -EINVAL; - - usb_function = cfs_find_usb_function(function); - if (!usb_function) - return -ENOENT; - - /* stop .socket first and stop .service later becuase of socket activation */ - if (usb_function->service) { - (void)systemd_stop_unit_wait_stopped(usb_function->service, ".socket", -1); - (void)systemd_stop_unit_wait_stopped(usb_function->service, ".service", -1); - } - - /* umount /dev/usb-funcs/[sdb|mtp]/default and remove it's directory */ - ret = snprintf(buf, sizeof(buf), "%s/%s/%s", USB_FUNCS_PATH, usb_function->name, usb_function->instance); - if (ret < 0) - return ret; - - ret = umount(buf); - if (ret < 0) - return ret; - - ret = rmdir(buf); - if (ret < 0) - return ret; - - /* remove /dev/usb-funcs/[sdb|mtp] directory */ - ret = snprintf(buf, sizeof(buf), "%s/%s", USB_FUNCS_PATH, usb_function->name); - if (ret < 0) - return ret; - - ret = rmdir(buf); - if (ret < 0 && errno != ENOTEMPTY) - return ret; - - /* remove /dev/usb-funcs/ directory */ - ret = rmdir(USB_FUNCS_PATH); - if (ret < 0 && errno != ENOTEMPTY) - return ret; - - return 0; -} - - -static int cfs_set_rndis_mac_addr(usbg_gadget *gadget, usbg_function *func) -{ - int i, ret; - struct ether_addr ethaddr; - struct usbg_gadget_strs strs; - struct usbg_f_net *nf = usbg_to_net_function(func); - - if (!nf) - return -EINVAL; - - ret = usbg_get_gadget_strs(gadget, LANG_US_ENG, &strs); - if (ret != USBG_SUCCESS) - return ret; - - for (i = 0; i < ETHER_ADDR_LEN; i++) - ethaddr.ether_addr_octet[i] = 0; - - for (i = 0; (i < 256) && strs.serial[i]; i++) { - ethaddr.ether_addr_octet[i % (ETHER_ADDR_LEN - 1) + 1] ^= strs.serial[i]; - } - ethaddr.ether_addr_octet[0] &= 0xfe; /* clear multicast bit */ - ethaddr.ether_addr_octet[0] |= 0x02; /* set local assignment bit (IEEE802) */ - - usbg_free_gadget_strs(&strs); - - /* host_addr changes mac address */ - ret = usbg_f_net_set_host_addr(nf, ðaddr); - - return ret; -} - -static int cfs_cleanup_all_config_and_function(struct cfs_client *cfs_client) -{ - int ret; - usbg_config *config; - usbg_function *function; - - /* delete all configs */ -restart_rm_config: - usbg_for_each_config(config, cfs_client->gadget) { - ret = usbg_rm_config(config, USBG_RM_RECURSE); - if (ret) - return ret; - - goto restart_rm_config; /* You cannot delete a config directly in an iterator. */ - } - - /* delete all functions */ -restart_rm_function: - usbg_for_each_function(function, cfs_client->gadget) { - if (usbg_get_function_type(function) == USBG_F_FFS) { - ret = cfs_cleanup_ffs_service(function); - if (ret) - return ret; - } - - ret = usbg_rm_function(function, USBG_RM_RECURSE); - if (ret) - return ret; - - goto restart_rm_function; /* You cannot delete a function directly in an iterator. */ - } - - return 0; -} - -static int cfs_set_gadget_config(struct cfs_client *cfs_client, int config_id, struct usb_configuration *usb_config) -{ - int i; - int ret; - int function_type; - usbg_config *config; - usbg_function *function; - struct usb_function *usb_func; - char instance[MAX_INSTANCE_LEN]; - struct usbg_config_attrs cattrs = { - .bmAttributes = usb_config->attrs.bmAttributs, - .bMaxPower = usb_config->attrs.MaxPower/2, - }; - - if (!usb_config->funcs || !usb_config->funcs[0]) - return -EINVAL; - - ret = usbg_create_config(cfs_client->gadget, config_id, CONFIGFS_CONFIG_LABEL, &cattrs, NULL, &config); - if (ret) - return ret; - - if (usb_config->strs.config_str) { - ret = usbg_set_config_string(config, usb_config->strs.lang_code, usb_config->strs.config_str); - if (ret) - return ret; - } - - for (i = 0; usb_config->funcs[i]; ++i) { - usb_func = usb_config->funcs[i]; - - /* name("sdb") + NAME_INSTANCE_SEP(".") + instance("default") + '\0' */ - if (strlen(usb_func->name) + strlen(usb_func->instance) + 2 > sizeof(instance)) - return -ENAMETOOLONG; - - /* In functionfs, the instance is used in the format "[sdb|mtp].default" instead of "default" */ - if (usb_func->is_functionfs) { - function_type = USBG_F_FFS; - snprintf(instance, sizeof(instance), "%s%c%s", usb_func->name, NAME_INSTANCE_SEP, usb_func->instance); - } else { - function_type = usbg_lookup_function_type(usb_func->name); - strncpy(instance, usb_func->instance, sizeof(instance) - 1); - instance[sizeof(instance) - 1] = '\0'; - } - - function = usbg_get_function(cfs_client->gadget, function_type, instance); - if (!function) { - ret = usbg_create_function(cfs_client->gadget, function_type, instance, NULL, &function); - if (ret) - return ret; - - /* Setting rndis mac address. This should be done at this point, - * since the node host_addr changes to read only after the function - * is added to config. */ - if (usbg_get_function_type(function) == USBG_F_RNDIS) - (void)cfs_set_rndis_mac_addr(cfs_client->gadget, function); /* A random value is used if fails */ - - if (usbg_get_function_type(function) == USBG_F_FFS) { - ret = cfs_prep_ffs_service(usb_func, function); - if (ret) - return ret; - } - } - - ret = usbg_add_config_function(config, NULL, function); - if (ret) - return ret; - } - - return 0; -} - -static int cfs_reconfigure_gadget(struct usb_gadget *gadget) -{ - int i; - int ret; - - if (!g_cfs_client || !gadget) - return -EINVAL; - - /* Verify the gadget and check if function is supported */ - if (!cfs_is_gadget_supported(gadget)) - return -ENOTSUP; - - ret = cfs_set_gadget_attrs(g_cfs_client, &gadget->attrs); - if (ret) - return ret; - - ret = cfs_set_gadget_strs(g_cfs_client, &gadget->strs); - if (ret) - return ret; - - ret = cfs_cleanup_all_config_and_function(g_cfs_client); - if (ret) - return ret; - - for (i = 0; gadget->configs[i]; ++i) { - ret = cfs_set_gadget_config(g_cfs_client, i + 1, gadget->configs[i]); - if (ret) - return ret; - } - - return 0; -} - -static void cfs_start_stop_service_and_handler(usbg_gadget *gadget, enum cfs_function_service_operation operation) -{ - usbg_function *function; - struct usb_function *usb_function; - - usbg_for_each_function(function, gadget) { - usb_function = cfs_find_usb_function(function); - if (!usb_function) - continue; - - switch(operation) { - case CFS_FUNCTION_SERVICE_START: - if (usb_function->handler) - usb_function->handler(1); - - /* functionfs service is automatically started by socket activation */ - if (!usb_function->is_functionfs && usb_function->service) - (void)systemd_start_unit_wait_started(usb_function->service, ".service", -1); - break; - - case CFS_FUNCTION_SERVICE_STOP: - if (!usb_function->is_functionfs && usb_function->service && !usb_function->remain_after_disable) - (void)systemd_stop_unit_wait_stopped(usb_function->service, ".service", -1); - - if (usb_function->handler) - usb_function->handler(0); - break; - - case CFS_FUNCTION_SERVICE_POST_STOP: - if (usb_function->is_functionfs && usb_function->service && !usb_function->remain_after_disable) - (void)systemd_stop_unit_wait_stopped(usb_function->service, ".service", -1); - break; - - default: - break; - } - } -} - -static int cfs_enable(void) -{ - int ret; - - if (!g_cfs_client) - return -EINVAL; - - ret = usbg_enable_gadget(g_cfs_client->gadget, g_cfs_client->udc); - if (ret) - return ret; - - cfs_start_stop_service_and_handler(g_cfs_client->gadget, CFS_FUNCTION_SERVICE_START); - - return 0; -} - -static int cfs_disable(void) -{ - int ret; - - if (!g_cfs_client) - return -EINVAL; - - cfs_start_stop_service_and_handler(g_cfs_client->gadget, CFS_FUNCTION_SERVICE_STOP); - - ret = usbg_disable_gadget(g_cfs_client->gadget); /* ignore error checking */ - - /* - * Since functionfs service works with socket activation, you must stop it after disabling gadget. - * If usb data may come in after stopping functionfs service and before disabling gadget, - * functionfs service wakes up again by socket activation. - */ - cfs_start_stop_service_and_handler(g_cfs_client->gadget, CFS_FUNCTION_SERVICE_POST_STOP); - - return ret; -} - -EXPORT -int hw_cfs_gadget_open(hal_backend_usb_gadget_funcs *usb_gadget_funcs) -{ - int ret; - - if (!usb_gadget_funcs) - return -EINVAL; - - g_cfs_client = calloc(1, sizeof(*g_cfs_client)); - if (!g_cfs_client) - return -ENOMEM; - - ret = usbg_init(CONFIGFS_PATH, &g_cfs_client->ctx); - if (ret) - goto err_usbg_init; - - g_cfs_client->udc = usbg_get_first_udc(g_cfs_client->ctx); - if (!g_cfs_client->udc) { - ret = -ENODEV; - goto err_no_udc; - } - - ret = usbg_create_gadget(g_cfs_client->ctx, CONFIGFS_GADGET_NAME, - &default_g_attrs, &default_g_strs, &g_cfs_client->gadget); - if (ret) - goto err_create_gadget; - - usb_gadget_funcs->enable = cfs_enable; - usb_gadget_funcs->disable = cfs_disable; - usb_gadget_funcs->reconfigure_gadget = cfs_reconfigure_gadget; - - return 0; - -err_create_gadget: -err_no_udc: - usbg_cleanup(g_cfs_client->ctx); -err_usbg_init: - free(g_cfs_client); - - return ret; -} - -EXPORT -int hw_cfs_gadget_close(hal_backend_usb_gadget_funcs *usb_gadget_funcs) -{ - usbg_function *function; - struct usb_function *usb_func; - - if (!usb_gadget_funcs || !g_cfs_client) - return -EINVAL; - - usbg_for_each_function(function, g_cfs_client->gadget) { - usb_func = cfs_find_usb_function(function); - if (!usb_func) - continue; - - if (usb_func->is_functionfs && usb_func->service) { - (void)systemd_stop_unit_wait_stopped(usb_func->service, ".socket", -1); - (void)systemd_stop_unit_wait_stopped(usb_func->service, ".service", -1); - } - } - - /* - * For now we don't check for errors - * but we should somehow handle them - */ - usbg_rm_gadget(g_cfs_client->gadget, USBG_RM_RECURSE); - usbg_cleanup(g_cfs_client->ctx); - free(g_cfs_client); - - return 0; -} - diff --git a/src/usb_gadget/usb_client_common.c b/src/usb_gadget/usb_client_common.c deleted file mode 100644 index a4699f8..0000000 --- a/src/usb_gadget/usb_client_common.c +++ /dev/null @@ -1,366 +0,0 @@ -/* - * Copyright (c) 2018 Samsung Electronics Co., Ltd. - * - * Licensed under the Apache License, Version 2.0 (the License); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include -#include -#include -#include -#include - -#include -#include -#include - -#include "usb_gadget.h" -#include "hal-backend-common.h" - -#define MAX_GADGET_STR_LEN 256 - -#define LEGACY_ROOTPATH "/sys/class/usb_mode/usb0" - -/* Device descriptor values */ -#define LEGACY_ID_VENDOR_PATH LEGACY_ROOTPATH"/idVendor" -#define LEGACY_ID_PRODUCT_PATH LEGACY_ROOTPATH"/idProduct" -#define LEGACY_BCD_DEVICE_PATH LEGACY_ROOTPATH"/bcdDevice" -#define LEGACY_CLASS_PATH LEGACY_ROOTPATH"/bDeviceClass" -#define LEGACY_SUBCLASS_PATH LEGACY_ROOTPATH"/bDeviceSubClass" -#define LEGACY_PROTOCOL_PATH LEGACY_ROOTPATH"/bDeviceProtocol" - -/* Strings */ -#define LEGACY_IMANUFACTURER_PATH LEGACY_ROOTPATH"/iManufacturer" -#define LEGACY_IPRODUCT_PATH LEGACY_ROOTPATH"/iProduct" - -/* Functions in each config */ -#define LEGACY_CONFIG_1_PATH LEGACY_ROOTPATH"/funcs_fconf" -#define LEGACY_CONFIG_2_PATH LEGACY_ROOTPATH"/funcs_sconf" - -/* should be single char */ -#define LEGACY_FUNC_SEP "," - -/* ON/OFF switch */ -#define LEGACY_ENABLE_PATH LEGACY_ROOTPATH"/enable" -#define LEGACY_ENABLE "1" -#define LEGACY_DISABLE "0" - -static bool legacy_is_function_supported(struct usb_function *func) -{ - char buf[PATH_MAX]; - - snprintf (buf, sizeof(buf), "%s/f_%s", LEGACY_ROOTPATH, func->name); - if (access(buf, F_OK)) - return false; - - return true; -} - -static bool legacy_is_gadget_supported(struct usb_gadget *gadget) -{ - int i, j; - struct usb_configuration *config; - - if (!gadget || !gadget->configs || !gadget->configs[0] || !gadget->configs[0]->funcs[0]) - return false; - - if (!gadget->attrs.idVendor || !gadget->attrs.idProduct || !gadget->attrs.bcdDevice) - return false; - - /* only strings in US_en are allowed */ - if (gadget->strs.lang_code != DEFAULT_LANG) - return false; - - if (!gadget->strs.manufacturer || !gadget->strs.product) - return false; - - for (j = 0; gadget->configs[j]; ++j) { - config = gadget->configs[j]; - - if (!config->funcs) - return false; - - for (i = 0; config->funcs[i]; ++i) - if (!legacy_is_function_supported(config->funcs[i])) - return false; - } - - return true; -} - -/* TODO. Maybe move this to sys ? */ -static int legacy_set_int_hex(char *path, int val) -{ - int r; - char buf[MAX_GADGET_STR_LEN]; - - if (!path) - return -EINVAL; - - snprintf(buf, sizeof(buf), "%x", val); - r = sys_set_str(path, buf); - if (r < 0) - return r; - - return 0; -} - -static int legacy_set_gadget_attrs(struct usb_gadget_attrs *attrs) -{ - int ret; - - ret = sys_set_int(LEGACY_CLASS_PATH, attrs->bDeviceClass); - if (ret) - return ret; - - ret = sys_set_int(LEGACY_SUBCLASS_PATH, attrs->bDeviceSubClass); - if (ret) - return ret; - - ret = sys_set_int(LEGACY_PROTOCOL_PATH, attrs->bDeviceProtocol); - if (ret) - return ret; - - ret = legacy_set_int_hex(LEGACY_ID_VENDOR_PATH, attrs->idVendor); - if (ret) - return ret; - - ret = legacy_set_int_hex(LEGACY_ID_PRODUCT_PATH, attrs->idProduct); - if (ret) - return ret; - - ret = legacy_set_int_hex(LEGACY_BCD_DEVICE_PATH, attrs->bcdDevice); - if (ret) - return ret; - - return 0; -} - -static int legacy_set_gadget_strs(struct usb_gadget_strings *strs) -{ - int ret; - - if (!strs->manufacturer || !strs->product) - return -EINVAL; - - ret = sys_set_str(LEGACY_IMANUFACTURER_PATH, strs->manufacturer); - if (ret) - return ret; - - ret = sys_set_str(LEGACY_IPRODUCT_PATH, strs->product); - if (ret) - return ret; - - /* The serial is written by the slp gadget kernel driver */ - - return 0; -} - -static int legacy_set_gadget_config(char *cpath, - struct usb_configuration *config) -{ - char buf[MAX_GADGET_STR_LEN]; - int left = sizeof(buf); - char *pos = buf; - int ret; - int i; - - if (!config) { - buf[0] = '\n'; - buf[1] = '\0'; - goto empty_config; - } - - for (i = 0; config->funcs[i]; ++i) { - ret = snprintf(pos, left, "%s" LEGACY_FUNC_SEP, - config->funcs[i]->name); - if (ret >= left) - return -EOVERFLOW; - - pos += ret; - left -= ret; - } - - /* eliminate last separator */ - *(pos - 1) = '\0'; - -empty_config: - return sys_set_str(cpath, buf); -} - -static int legacy_reconfigure_gadget(struct usb_gadget *gadget) -{ - int ret; - - if (!gadget) - return -EINVAL; - - /* Verify the gadget and check if function is supported */ - if (!legacy_is_gadget_supported(gadget)) - return -ENOTSUP; - - ret = legacy_set_gadget_attrs(&gadget->attrs); - if (ret) - return ret; - - ret = legacy_set_gadget_strs(&gadget->strs); - if (ret) - return ret; - - ret = legacy_set_gadget_config(LEGACY_CONFIG_1_PATH, gadget->configs[0]); - if (ret) - return ret; - - ret = legacy_set_gadget_config(LEGACY_CONFIG_2_PATH, gadget->configs[1]); - if (ret) - return ret; - - return 0; -} - -static void legacy_start_stop_service_and_handler(bool start) -{ - int i; - int ret; - int n_func = 0; - char *ptr; - char *begin; - char *fname; - char *sep = LEGACY_FUNC_SEP; - char buf[MAX_GADGET_STR_LEN]; - struct usb_function *func; - struct usb_function *funcs[USB_FUNCTION_IDX_MAX]; - - /* SLP gadget uses two USB configuration. - * (/sys/class/usb_mode/usb0/funcs_fconf and /sys/class/usb_mode/usb0/funcs_sconf) - * - * One usb function can be included in two configurations simultaneously. - * In this situation, a handler associated with function can be called twice for a usb function. - * To prevent duplicate calls, - * Collect all functions and remove duplicates and process them. - */ - - /* First configuration */ - ret = sys_get_str(LEGACY_CONFIG_1_PATH, buf, sizeof(buf)); - if (ret) - goto second_configuration; - - /* Caution: buf ends with '\n' */ - ptr = strchr(buf, '\n'); - if (ptr) - *ptr = 0; - - begin = buf; - for (fname = strsep(&begin, sep); fname; fname = strsep(&begin, sep)) { - func = find_usb_function_by_name(fname); - if (!func) - continue; - - for (i = 0; i < n_func; i++) - if (funcs[i] == func) - continue; - - if(n_func >= USB_FUNCTION_IDX_MAX) /* What happen */ - break; - - funcs[n_func] = func; - n_func++; - } - - /* Second configuration */ -second_configuration: - ret = sys_get_str(LEGACY_CONFIG_2_PATH, buf, sizeof(buf)); - if (ret) - return; - - /* Caution: buf ends with '\n' */ - ptr = strchr(buf, '\n'); - if (ptr) - *ptr = 0; - - begin = buf; - for (fname = strsep(&begin, sep); fname; fname = strsep(&begin, sep)) { - func = find_usb_function_by_name(fname); - if (!func) - continue; - - for (i = 0; i < n_func; i++) - if (funcs[i] == func) - continue; - - if(n_func >= USB_FUNCTION_IDX_MAX) /* What happen */ - break; - - funcs[n_func] = func; - n_func++; - } - - for (i = 0; i < n_func; i++) { - if (start) { - if (funcs[i]->handler) - funcs[i]->handler(1); - - if (funcs[i]->service) - (void)systemd_start_unit_wait_started(funcs[i]->service, ".service", -1); - } else { - if (funcs[i]->service && !funcs[i]->remain_after_disable) - (void)systemd_stop_unit_wait_stopped(funcs[i]->service, ".service", -1); - - if (funcs[i]->handler) - funcs[i]->handler(0); - } - } -} - -static int legacy_enable(void) -{ - int ret; - - ret = sys_set_str(LEGACY_ENABLE_PATH, LEGACY_ENABLE); - if (ret < 0) - return ret; - - legacy_start_stop_service_and_handler(true); - - return 0; -} - -static int legacy_disable(void) -{ - legacy_start_stop_service_and_handler(false); - - return sys_set_str(LEGACY_ENABLE_PATH, LEGACY_DISABLE); -} - -EXPORT -int hw_legacy_gadget_open(hal_backend_usb_gadget_funcs *usb_gadget_funcs) -{ - if (!usb_gadget_funcs) - return -EINVAL; - - /* check if slp usb gadget exists */ - if (access("/sys/class/usb_mode/usb0/enable", F_OK)) - return -ENOENT; - - usb_gadget_funcs->enable = legacy_enable; - usb_gadget_funcs->disable = legacy_disable; - usb_gadget_funcs->reconfigure_gadget = legacy_reconfigure_gadget; - - return 0; -} - -EXPORT -int hw_legacy_gadget_close(hal_backend_usb_gadget_funcs *usb_gadget_funcs) -{ - return 0; -} diff --git a/src/usb_gadget/usb_gadget.h b/src/usb_gadget/usb_gadget.h deleted file mode 100644 index 466753f..0000000 --- a/src/usb_gadget/usb_gadget.h +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Copyright (c) 2016 Samsung Electronics Co., Ltd. - * - * Licensed under the Apache License, Version 2.0 (the License); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef __HW_USB_GADGET_H__ -#define __HW_USB_GADGET_H__ - - -struct usb_function *find_usb_function_by_id(int id); -struct usb_function *find_usb_function_by_name(const char *name); -struct usb_function *find_usb_function_by_name_instance(const char *name, const char *instance); - -#endif diff --git a/src/usb_gadget/usb_gadget_common.c b/src/usb_gadget/usb_gadget_common.c deleted file mode 100644 index 02a92ed..0000000 --- a/src/usb_gadget/usb_gadget_common.c +++ /dev/null @@ -1,468 +0,0 @@ -/* - * Copyright (c) 2018 Samsung Electronics Co., Ltd. - * - * Licensed under the Apache License, Version 2.0 (the License); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include -#include -#include -#include - -#include - -#include -#include -#include - -#include "usb_gadget.h" -#include "hal-backend-common.h" - -static struct usb_function *_available_funcs[]; - -/************************************** - * Those symbols must be initialized first in deviced - * - * The usb-gadget source code have been scattered throughout the deviced and device-common. - * Because of this, it might have been implemented that totally same data structure on the - * both side. To avoid this inefficiency, define/initialize the data structure on the - * deviced first, and device-common refer it through dlsym(). The deviced must have - * cflag -rdynamic or ldflag --export-dynamic so that the dlopen-ed device-common can refer - * those variables with dlsym(). - * - * Accessing symbol in this way would be removed when the usb-gadget of the device-common - * is integrated into the deviced. - */ -#include -#include - -struct _usb_mode_mapping_table { - int mode_v; /* Integer defined by vconf */ - unsigned int mode; /* Bitmap of usb function combination */ - struct usb_gadget_attrs attrs; -}; -static GList *usb_mode_mapping_table_custom; - -struct service_config { - char name[128]; - int remain_after_disable; -}; -static GList *service_config_list; -/**************************************/ - -struct usb_function *find_usb_function_by_id(int id); - -static void simple_cleanup_config(struct usb_configuration *config) -{ - if (!config) - return; - - free(config->strs.config_str); - - if (config->funcs) - free(config->funcs); - - free(config); -} - -static void cleanup_gadget(struct usb_gadget *gadget) -{ - int i; - - if (!gadget) - return; - - free(gadget->strs.manufacturer); - free(gadget->strs.product); - free(gadget->strs.serial); - - if (gadget->configs) { - for (i = 0; gadget->configs[i]; ++i) - simple_cleanup_config(gadget->configs[i]); - - free(gadget->configs); - } - - free(gadget); -} - -static int alloc_default_config(struct usb_configuration **_config) -{ - struct usb_configuration *config; - - config = calloc(1, sizeof(*config)); - if (!config) - return -ENOMEM; - - config->attrs.bmAttributs = DEFAULT_BMATTRIBUTES; - config->attrs.MaxPower = DEFAULT_MAX_POWER; - - /* TODO. Here is where to set the string used in config of configfs */ - - *_config = config; - - return 0; -} - -static int alloc_default_gadget(char *serial, struct usb_gadget **_gadget) -{ - struct usb_gadget *gadget; - struct usb_configuration **configs; - - gadget = calloc(1, sizeof(*gadget)); - if (!gadget) - goto out; - - gadget->attrs.idVendor = DEFAULT_VID; - gadget->attrs.idProduct = DEFAULT_PID; - gadget->attrs.bcdDevice = DEFAULT_BCD_DEVICE; - - gadget->strs.lang_code = DEFAULT_LANG; - gadget->strs.manufacturer = strdup(DEFAULT_MANUFACTURER); - gadget->strs.product = strdup(DEFAULT_PRODUCT); - gadget->strs.serial = strdup(serial); - - if (!gadget->strs.manufacturer || !gadget->strs.product || !gadget->strs.serial) - goto free_strs; - - /* slp-gadget use max 2 confiuration and NULL termination */ - configs = calloc(3, sizeof(*configs)); - if (!configs) - goto free_strs; - - gadget->configs = configs; - *_gadget = gadget; - - return 0; - -free_strs: - free(gadget->strs.manufacturer); - free(gadget->strs.product); - free(gadget->strs.serial); - free(gadget); -out: - return -ENOMEM; -} - -static int id_to_gadget(struct usb_gadget_id *gadget_id, char *serial, struct usb_gadget **_gadget) -{ - int ret; - int i, j; - int n_configs; - struct usb_gadget *gadget; - int functions[2][sizeof(gadget_id->function_mask)*8]; /* zero terminates */ - - GList *elem; - const struct _usb_mode_mapping_table *cm = NULL; - - if (!gadget_id || !serial || !_gadget) - return -EINVAL; - - ret = alloc_default_gadget(serial, &gadget); - if (ret) - goto out; - - /* find custom mode */ - SYS_G_LIST_FOREACH(usb_mode_mapping_table_custom, elem, cm) { - if (cm->mode == gadget_id->function_mask) - break; - } - - if (cm) { - int i, j; - - j = 0; - n_configs = 1; - for (i = 0; i < USB_FUNCTION_IDX_MAX; ++i) { - if (cm->mode & (1 << i)) - functions[0][j++] = (1 << i); - } - functions[0][j] = 0; - - if (cm->attrs.idVendor) - gadget->attrs.idVendor = cm->attrs.idVendor; - if (cm->attrs.idProduct) - gadget->attrs.idProduct = cm->attrs.idProduct; - - } else { - /* - * Currently all gadgets use inly single configuration but - * slp-gadget is capable to handle two of them - * - * Order of interfaces in configuration is significant - * so in this switch we sort our functions in a correct order - */ - switch (gadget_id->function_mask) { - /* MTP, ACM, SDB */ - case USB_FUNCTION_MTP | USB_FUNCTION_ACM: - n_configs = 1; - functions[0][0] = USB_FUNCTION_MTP; - functions[0][1] = USB_FUNCTION_ACM; - functions[0][2] = 0; - gadget->attrs.idProduct = 0x6860; - break; - - case USB_FUNCTION_MTP | USB_FUNCTION_ACM | USB_FUNCTION_SDB: - n_configs = 1; - functions[0][0] = USB_FUNCTION_MTP; - functions[0][1] = USB_FUNCTION_ACM; - functions[0][2] = USB_FUNCTION_SDB; - functions[0][3] = 0; - gadget->attrs.idProduct = 0x6860; - break; - - /* DIAG */ - case USB_FUNCTION_MTP | USB_FUNCTION_ACM | USB_FUNCTION_SDB | USB_FUNCTION_DIAG: - n_configs = 1; - functions[0][0] = USB_FUNCTION_MTP; - functions[0][1] = USB_FUNCTION_ACM; - functions[0][2] = USB_FUNCTION_SDB; - functions[0][3] = USB_FUNCTION_DIAG; - functions[0][4] = 0; - gadget->attrs.idProduct = 0x6860; - break; - - /* RNDIS */ - case USB_FUNCTION_RNDIS: - n_configs = 1; - functions[0][0] = USB_FUNCTION_RNDIS; - functions[0][1] = 0; - gadget->attrs.idProduct = 0x6863; - break; - - case USB_FUNCTION_RNDIS | USB_FUNCTION_DIAG: - n_configs = 1; - functions[0][0] = USB_FUNCTION_RNDIS; - functions[0][1] = USB_FUNCTION_DIAG; - functions[0][2] = 0; - gadget->attrs.idProduct = 0x6864; - break; - - case USB_FUNCTION_ACM | USB_FUNCTION_SDB | USB_FUNCTION_RNDIS: - n_configs = 1; - functions[0][0] = USB_FUNCTION_RNDIS; - functions[0][1] = USB_FUNCTION_ACM; - functions[0][2] = USB_FUNCTION_SDB; - functions[0][3] = 0; - gadget->attrs.idProduct = 0x6864; - break; - - /* RMNET */ - case USB_FUNCTION_DIAG | USB_FUNCTION_RMNET: - n_configs = 1; - functions[0][0] = USB_FUNCTION_DIAG; - functions[0][1] = USB_FUNCTION_RMNET; - functions[0][2] = 0; - gadget->attrs.idProduct = 0x685d; - break; - - /* DM */ - case USB_FUNCTION_ACM | USB_FUNCTION_SDB | USB_FUNCTION_DM: - n_configs = 1; - functions[0][0] = USB_FUNCTION_ACM; - functions[0][1] = USB_FUNCTION_SDB; - functions[0][2] = USB_FUNCTION_DM; - functions[0][3] = 0; - gadget->attrs.idProduct = 0x6860; - break; - - default: - ret = -EINVAL; - goto free_gadget; - }; - } - - for (j = 0; j < n_configs; ++j) { - int n_funcs_in_config; - struct usb_configuration *config; - - for (i = 0; functions[j][i]; ++i); - n_funcs_in_config = i; - - ret = alloc_default_config(&config); - if (ret) - goto free_configs; - - gadget->configs[j] = config; - config->funcs = calloc(n_funcs_in_config + 1, sizeof(void *)); - if (!config->funcs) - goto free_configs; - - for (i = 0; functions[j][i]; ++i) { - config->funcs[i] = find_usb_function_by_id(functions[j][i]); - if (!config->funcs[i]) - goto free_configs; - } - } - - *_gadget = gadget; - - return 0; - -free_configs: -free_gadget: - cleanup_gadget(gadget); -out: - return ret; -} - -void rndis_handler(int enable) -{ - if (enable) - (void)systemd_start_unit_wait_started("rndis.service", NULL, -1); - else - (void)systemd_stop_unit_wait_stopped("rndis.service", NULL, -1); -} - -#define DEFINE_USB_FUNCTION(_id, _name, _is_functionfs, _service, _handler) \ - static struct usb_function _##_name##_function = { \ - .id = _id, \ - .name = #_name, \ - .instance = "default", \ - .is_functionfs = _is_functionfs, \ - .service = _service, \ - .remain_after_disable = 0, \ - .handler = _handler, \ - } - -DEFINE_USB_FUNCTION(USB_FUNCTION_MTP, mtp, 1, "mtp-responder", NULL); -DEFINE_USB_FUNCTION(USB_FUNCTION_ACM, acm, 0, "data-router", NULL); -DEFINE_USB_FUNCTION(USB_FUNCTION_SDB, sdb, 1, "sdbd", NULL); -DEFINE_USB_FUNCTION(USB_FUNCTION_RNDIS, rndis, 0, "sshd", rndis_handler); -DEFINE_USB_FUNCTION(USB_FUNCTION_DIAG, diag, 1, "diag", NULL); -DEFINE_USB_FUNCTION(USB_FUNCTION_CONN_GADGET, conn_gadget, 0, NULL, NULL); -DEFINE_USB_FUNCTION(USB_FUNCTION_DM, dm, 0, NULL, NULL); -DEFINE_USB_FUNCTION(USB_FUNCTION_RMNET, rmnet, 0, NULL, NULL); - -#undef DEFINE_USB_FUNCTION - -/* Caution: index order of arrary is important, because simple_translator_open() uses it. */ -static struct usb_function *_available_funcs[] = { - [USB_FUNCTION_IDX_MTP] = &_mtp_function, - [USB_FUNCTION_IDX_ACM] = &_acm_function, - [USB_FUNCTION_IDX_SDB] = &_sdb_function, - [USB_FUNCTION_IDX_RNDIS] = &_rndis_function, - [USB_FUNCTION_IDX_DIAG] = &_diag_function, - [USB_FUNCTION_IDX_CONN_GADGET] = &_conn_gadget_function, - [USB_FUNCTION_IDX_DM] = &_dm_function, - [USB_FUNCTION_IDX_RMNET] = &_rmnet_function, - [USB_FUNCTION_IDX_MAX] = NULL /* An indicator to end the array */ -}; - -struct usb_function *find_usb_function_by_id(int id) -{ - int i; - - for (i = 0; _available_funcs[i]; i++) - if (_available_funcs[i]->id == id) - return _available_funcs[i]; - - return NULL; -} - -struct usb_function *find_usb_function_by_name(const char *name) -{ - int i; - - if(!name || !name[0]) - return NULL; - - for (i = 0; _available_funcs[i]; i++) - if (!strcmp(name, _available_funcs[i]->name)) - return _available_funcs[i]; - - return NULL; -} - -struct usb_function *find_usb_function_by_name_instance(const char *name, const char *instance) -{ - int i; - - if(!name || !name[0] || !instance || !instance[0]) - return NULL; - - for (i = 0; _available_funcs[i]; ++i) - if (!strcmp(name, _available_funcs[i]->name) && !strcmp(instance, _available_funcs[i]->instance)) - return _available_funcs[i]; - - return NULL; -} - -static void set_service_config(gpointer data, gpointer udata) -{ - struct service_config *svc = (struct service_config *) data; - int i; - - for (i = 0; _available_funcs[i]; ++i) { - if (!strcmp(svc->name, _available_funcs[i]->name)) { - _available_funcs[i]->remain_after_disable = svc->remain_after_disable; - _I("%s: remain_after_disable=%d", svc->name, svc->remain_after_disable); - } - } -} - -EXPORT -int simple_translator_open(hal_backend_usb_gadget_funcs *usb_gadget_funcs) -{ - char *dlerr; - - if (!usb_gadget_funcs) - return -EINVAL; - - dlerror(); // clear any existing dl error - - usb_mode_mapping_table_custom = *(GList **) dlsym(RTLD_DEFAULT, "usb_mode_mapping_table_custom"); - dlerr = dlerror(); - if (dlerr) { - _E("%s", dlerr); - return -ENOTSUP; - } - - service_config_list = *(GList **) dlsym(RTLD_DEFAULT, "service_config_list"); - dlerr = dlerror(); - if (dlerr) { - _E("%s", dlerror()); - return -ENOTSUP; - } - - /* e.g. - * /hal/etc/deviced/usb_gadget.conf - * - * [SystemdUnit] - * Name=diag.service - * RemainAfterDisable=yes - */ - g_list_foreach(service_config_list, set_service_config, NULL); - - usb_gadget_funcs->id_to_gadget = id_to_gadget; - usb_gadget_funcs->cleanup_gadget = cleanup_gadget; - - /* Use mtp-responder-dummy.socket when there is no mtp-responser.socket. - * - * The mtp-responder.socket is special in the configfs environment. - * If mtp-responder.socket is missing, gadget configuration will fail. - * As a result, all usb operations do not work properly. - * So in environments that mtp doesn't support, use dummy mtp. - */ - if (access("/usr/lib/systemd/system/mtp-responder.socket", F_OK)) { - _available_funcs[USB_FUNCTION_IDX_MTP]->service = "mtp-responder-dummy"; - } - - return 0; -} - -EXPORT -int simple_translator_close(hal_backend_usb_gadget_funcs *usb_gadget_funcs) -{ - return 0; -}