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// Copyright 2019 Robin Krahl <robin.krahl@ireas.org>
// SPDX-License-Identifier: GPL-3.0-or-later
use usb_device::bus::{InterfaceNumber, StringIndex, UsbBus, UsbBusAllocator};
use usb_device::class::{ControlIn, ControlOut, UsbClass};
use usb_device::descriptor::DescriptorWriter;
use usb_device::endpoint::{EndpointAddress, EndpointIn};
use usb_device::Result;
const INTERFACE_CLASS_HID: u8 = 0x03;
enum_u8! {
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum Subclass {
None = 0x00,
BootInterface = 0x01,
}
}
enum_u8! {
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum Protocol {
None = 0x00,
Keyboard = 0x01,
Mouse = 0x02,
}
}
pub struct HidClass<'a, B: UsbBus> {
interface: InterfaceNumber,
endpoint_interrupt_in: EndpointIn<'a, B>,
expect_interrupt_in_complete: bool,
subclass: Subclass,
protocol: Protocol,
}
impl<B: UsbBus> HidClass<'_, B> {
pub fn new(
alloc: &UsbBusAllocator<B>,
subclass: Subclass,
protocol: Protocol,
) -> HidClass<'_, B> {
HidClass {
interface: alloc.interface(),
endpoint_interrupt_in: alloc.interrupt(8, 10),
expect_interrupt_in_complete: false,
subclass,
protocol,
}
}
}
impl<B: UsbBus> UsbClass<B> for HidClass<'_, B> {
fn poll(&mut self) {}
fn reset(&mut self) {
self.expect_interrupt_in_complete = false;
}
fn get_configuration_descriptors(&self, writer: &mut DescriptorWriter) -> Result<()> {
writer.interface(
self.interface,
INTERFACE_CLASS_HID,
self.subclass.into(),
self.protocol.into(),
)?;
writer.endpoint(&self.endpoint_interrupt_in)?;
Ok(())
}
fn get_string(&self, _index: StringIndex, _lang_id: u16) -> Option<&str> {
None
}
fn endpoint_in_complete(&mut self, addr: EndpointAddress) {
if addr == self.endpoint_interrupt_in.address() {
if self.expect_interrupt_in_complete {
self.expect_interrupt_in_complete = false;
} else {
panic!("unexpected endpoint_in_complete");
}
}
}
fn endpoint_out(&mut self, _addr: EndpointAddress) {}
fn control_in(&mut self, _xfer: ControlIn<B>) {}
fn control_out(&mut self, _xfer: ControlOut<B>) {}
}
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