don't auto-enable USB port during normal boot on Tensor Pixel devices

USB port is now enabled only after checking USB port security policy, which is done later in USB HAL
and in system_server.

Requires corresponding patches to tcpci_max77759 kernel module.

This change doesn't apply to recovery and charger boot modes.

Author: muhomorr

init/first_stage_init.cpp

@@ -209,9 +209,9 @@ std::string GetModuleLoadList(BootMode boot_mode, const std::string& dir_path) {
 }
 
 #define MODULE_BASE_DIR "/lib/modules"
-bool LoadKernelModules(BootMode boot_mode, bool want_console, bool want_parallel,
+bool LoadKernelModules(BootMode boot_mode, bool want_console, bool want_parallel, bool disable_usb_port,
                        int& modules_loaded) {
-    struct utsname uts {};
+    struct utsname uts{};
     if (uname(&uts)) {
         LOG(FATAL) << "Failed to get kernel version.";
     }
@@ -267,7 +267,7 @@ bool LoadKernelModules(BootMode boot_mode, bool want_console, bool want_parallel
     for (const auto& module_dir : module_dirs) {
         std::string dir_path = MODULE_BASE_DIR "/";
         dir_path.append(module_dir);
-        Modprobe m({dir_path}, GetModuleLoadList(boot_mode, dir_path));
+        Modprobe m({dir_path}, GetModuleLoadList(boot_mode, dir_path), true, disable_usb_port);
         bool retval = m.LoadListedModules(!want_console);
         modules_loaded = m.GetModuleCount();
         if (modules_loaded > 0) {
@@ -276,7 +276,7 @@ bool LoadKernelModules(BootMode boot_mode, bool want_console, bool want_parallel
         }
     }
 
-    Modprobe m({MODULE_BASE_DIR}, GetModuleLoadList(boot_mode, MODULE_BASE_DIR));
+    Modprobe m({MODULE_BASE_DIR}, GetModuleLoadList(boot_mode, MODULE_BASE_DIR), true, disable_usb_port);
     bool retval = (want_parallel) ? m.LoadModulesParallel(std::thread::hardware_concurrency())
                                   : m.LoadListedModules(!want_console);
     modules_loaded = m.GetModuleCount();
@@ -432,8 +432,9 @@ int FirstStageMain(int argc, char** argv) {
     boot_clock::time_point module_start_time = boot_clock::now();
     int module_count = 0;
     BootMode boot_mode = GetBootMode(cmdline, bootconfig);
+    bool disable_usb_port = boot_mode == BootMode::NORMAL_MODE;
     if (!LoadKernelModules(boot_mode, want_console,
-                           want_parallel, module_count)) {
+                           want_parallel, disable_usb_port, module_count)) {
         if (want_console != FirstStageConsoleParam::DISABLED) {
             LOG(ERROR) << "Failed to load kernel modules, starting console";
         } else {

libmodprobe/include/modprobe/modprobe.h

@@ -28,7 +28,7 @@
 class Modprobe {
   public:
     Modprobe(const std::vector<std::string>&, const std::string load_file = "modules.load",
-             bool use_blocklist = true);
+             bool use_blocklist = true, bool disable_usb_port = false);
 
     bool LoadModulesParallel(int num_threads);
     bool LoadListedModules(bool strict = true);

libmodprobe/libmodprobe.cpp

@@ -316,7 +316,7 @@ void Modprobe::ParseKernelCmdlineOptions(void) {
 }
 
 Modprobe::Modprobe(const std::vector<std::string>& base_paths, const std::string load_file,
-                   bool use_blocklist)
+                   bool use_blocklist, bool disable_usb_port)
     : blocklist_enabled(use_blocklist) {
     using namespace std::placeholders;
 
@@ -341,6 +341,10 @@ Modprobe::Modprobe(const std::vector<std::string>& base_paths, const std::string
     }
 
     ParseKernelCmdlineOptions();
+
+    if (disable_usb_port) {
+        AddOption("tcpci_max77759", "disable_cc_toggling_by_default", "1");
+    }
 }
 
 std::vector<std::string> Modprobe::GetDependencies(const std::string& module) {