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Kernel/Userland: Expose usb device address and use it in lsusb

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We now expose the `USBDevice`'s address in the SysFS object. This means
that device addresses are no longer determined by the name of the file
in the `/bus/usb/` directory. This was an incorrect way of determining
device address, as a standard PC can have multiple USB controllers
(and hence multiple buses) that can have overlapping device IDs.
This commit is contained in:
Jesse Buhagiar 2021-08-29 16:24:55 +10:00 • committed by Andreas Kling
parent 32b4470ea3
commit 59eab8148d
2 changed files with 4 additions and 3 deletions
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1
Kernel/Bus/USB/SysFSUSB.cpp
View file

@ -29,6 +29,7 @@ KResultOr<size_t> SysFSUSBDeviceInformation::read_bytes(off_t offset, size_t cou
JsonArraySerializer array { builder };
auto obj = array.add_object();
obj.add("device_address", m_device->address());
obj.add("usb_spec_compliance_bcd", m_device->device_descriptor().usb_spec_compliance_bcd);
obj.add("device_class", m_device->device_descriptor().device_class);
obj.add("device_sub_class", m_device->device_descriptor().device_sub_class);

6
Userland/Utilities/lsusb.cpp
View file

@ -53,7 +53,6 @@ int main(int argc, char** argv)
auto full_path = LexicalPath(usb_devices.next_full_path());
auto proc_usb_device = Core::File::construct(full_path.string());
auto bus_id = proc_usb_device->filename().split('/').last();
if (!proc_usb_device->open(Core::OpenMode::ReadOnly)) {
warnln("Failed to open {}: {}", proc_usb_device->name(), proc_usb_device->error_string());
continue;
@ -63,9 +62,10 @@ int main(int argc, char** argv)
auto json = JsonValue::from_string(contents);
VERIFY(json.has_value());
json.value().as_array().for_each([bus_id, usb_db](auto& value) {
json.value().as_array().for_each([usb_db](auto& value) {
auto& device_descriptor = value.as_object();
auto device_address = device_descriptor.get("device_address").to_u32();
auto vendor_id = device_descriptor.get("vendor_id").to_u32();
auto product_id = device_descriptor.get("product_id").to_u32();
@ -74,7 +74,7 @@ int main(int argc, char** argv)
if (device_string.is_empty())
device_string = "Unknown Device";
outln("Device {}: ID {:04x}:{:04x} {} {}", bus_id, vendor_id, product_id, vendor_string, device_string);
outln("Device {}: ID {:04x}:{:04x} {} {}", device_address, vendor_id, product_id, vendor_string, device_string);
});
}