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initrd-usb: Implement android_usb gadget in task

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This commit is contained in:
Samuel Dionne-Riel 2020-01-13 14:55:47 -05:00
parent d913324948
commit 57a18403bd
2 changed files with 62 additions and 19 deletions
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4
modules/initrd-usb.nix
View File

@ -67,9 +67,9 @@ in
];
bootConfig = {
boot.usb.features = cfg.usb.features;
boot.usb.functions = builtins.listToAttrs (
boot.usb.functions = mkIf (device_info ? gadgetfs) (builtins.listToAttrs (
builtins.map (feature: { name = feature; value = device_info.gadgetfs.functions."${feature}"; }) cfg.usb.features
);
));
usb = {
inherit (config.mobile.usb) idVendor idProduct;
};

77
modules/stage-1/tasks/usb-gadget-task.rb
View File

@ -103,10 +103,57 @@ module System::ConfigFSUSB
end
end
# This task detects which gadget mode to use, and sets it up.
class Tasks::SetupGadgetMode < SingletonTask
class System::AndroidUSB
include Singleton
attr_accessor :features
ANDROID_USB = "/sys/class/android_usb"
def path_prefix()
File.join(ANDROID_USB, "android0")
end
def id_vendor=(value)
set_id("idVendor", value)
end
def id_product=(value)
set_id("idProduct", value)
end
def manufacturer=(value)
set_string("iManufacturer", value)
end
def product=(value)
set_string("iProduct", value)
end
def serial_number=(value)
set_string("iSerial", value)
end
def set_id(kind, value)
value = ["0", value.sub(/^0x/, "")].join("x")
File.write(File.join(path_prefix, kind), value)
end
def set_string(name, value)
File.write(File.join(path_prefix, name), value)
end
def activate!()
File.write(File.join(path_prefix, "enable"), "0")
File.write(File.join(path_prefix, "bDeviceClass"), "0")
File.write(File.join(path_prefix, "functions"), @features.join(","))
sleep(0.1)
File.write(File.join(path_prefix, "enable"), "1")
sleep(0.1)
end
end
# This task detects which gadget mode to use, and sets it up.
class Tasks::SetupGadgetMode < SingletonTask
def initialize()
add_dependency(:Mount, "/sys")
add_dependency(:Mount, System::ConfigFSUSB::CONFIGFS)
@ -119,18 +166,18 @@ class Tasks::SetupGadgetMode < SingletonTask
end
def run()
if File.exist?(System::ConfigFSUSB::CONFIGFS_USB)
run_configfs_usb
elsif File.exist?(ANDROID_USB)
run_androidusb
else
log("No way to configure USB Gadget found.")
end
end
gadget =
if File.exist?(System::ConfigFSUSB::CONFIGFS_USB)
log("Configuring CONFIGFS USB Gadget.")
gadget = System::ConfigFSUSB::Gadget.new("g1")
elsif File.exist?(System::AndroidUSB::ANDROID_USB)
log("Configuring ANDROID_USB Gadget.")
gadget = System::AndroidUSB.instance()
else
log("No way to configure USB Gadget found.")
return
end
def run_configfs_usb()
log("Configuring CONFIGFS USB Gadget.")
gadget = System::ConfigFSUSB::Gadget.new("g1")
gadget.id_vendor = Configuration["usb"]["idVendor"]
gadget.id_product = Configuration["usb"]["idProduct"]
gadget.product = Configuration["device"]["name"]
@ -140,8 +187,4 @@ class Tasks::SetupGadgetMode < SingletonTask
gadget.features = Configuration["boot"]["usb"]["features"]
gadget.activate!
end
def run_android_usb()
log("Configuring ANDROID_USB Gadget.")
end
end