diff --git a/embassy-nrf/src/usb.rs b/embassy-nrf/src/usb.rs index ed4d5cf3..6be4fec8 100644 --- a/embassy-nrf/src/usb.rs +++ b/embassy-nrf/src/usb.rs @@ -391,11 +391,6 @@ impl<'d, T: Instance, P: UsbSupply> driver::Bus for Bus<'d, T, P> { .await } - #[inline] - fn set_address(&mut self, _addr: u8) { - // Nothing to do, the peripheral handles this. - } - fn endpoint_set_stalled(&mut self, ep_addr: EndpointAddress, stalled: bool) { let regs = T::regs(); unsafe { @@ -841,6 +836,11 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> { let regs = T::regs(); regs.tasks_ep0stall.write(|w| w.tasks_ep0stall().bit(true)); } + + async fn accept_set_address(&mut self, _addr: u8) { + self.accept().await; + // Nothing to do, the peripheral handles this. + } } fn dma_start() { diff --git a/embassy-rp/src/usb.rs b/embassy-rp/src/usb.rs index 8361736a..2710c4ad 100644 --- a/embassy-rp/src/usb.rs +++ b/embassy-rp/src/usb.rs @@ -406,13 +406,6 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> { .await } - #[inline] - fn set_address(&mut self, addr: u8) { - let regs = T::regs(); - trace!("setting addr: {}", addr); - unsafe { regs.addr_endp().write(|w| w.set_address(addr)) } - } - fn endpoint_set_stalled(&mut self, _ep_addr: EndpointAddress, _stalled: bool) { todo!(); } @@ -812,4 +805,12 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> { T::dpram().ep_in_buffer_control(0).write(|w| w.set_stall(true)); } } + + async fn accept_set_address(&mut self, addr: u8) { + self.accept().await; + + let regs = T::regs(); + trace!("setting addr: {}", addr); + unsafe { regs.addr_endp().write(|w| w.set_address(addr)) } + } } diff --git a/embassy-stm32/src/usb/usb.rs b/embassy-stm32/src/usb/usb.rs index cba4915c..062c7ef7 100644 --- a/embassy-stm32/src/usb/usb.rs +++ b/embassy-stm32/src/usb/usb.rs @@ -489,18 +489,6 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> { .await } - #[inline] - fn set_address(&mut self, addr: u8) { - let regs = T::regs(); - trace!("setting addr: {}", addr); - unsafe { - regs.daddr().write(|w| { - w.set_ef(true); - w.set_add(addr); - }) - } - } - fn endpoint_set_stalled(&mut self, ep_addr: EndpointAddress, stalled: bool) { // This can race, so do a retry loop. let reg = T::regs().epr(ep_addr.index() as _); @@ -1017,4 +1005,17 @@ impl<'d, T: Instance> driver::ControlPipe for ControlPipe<'d, T> { }); } } + + async fn accept_set_address(&mut self, addr: u8) { + self.accept().await; + + let regs = T::regs(); + trace!("setting addr: {}", addr); + unsafe { + regs.daddr().write(|w| { + w.set_ef(true); + w.set_add(addr); + }) + } + } } diff --git a/embassy-usb-driver/src/lib.rs b/embassy-usb-driver/src/lib.rs index d7238dc7..64d64735 100644 --- a/embassy-usb-driver/src/lib.rs +++ b/embassy-usb-driver/src/lib.rs @@ -164,9 +164,6 @@ pub trait Bus { async fn poll(&mut self) -> Event; - /// Sets the device USB address to `addr`. - fn set_address(&mut self, addr: u8); - /// Enables or disables an endpoint. fn endpoint_set_enabled(&mut self, ep_addr: EndpointAddress, enabled: bool); @@ -306,6 +303,12 @@ pub trait ControlPipe { /// /// Sets a STALL condition on the pipe to indicate an error. async fn reject(&mut self); + + /// Accept SET_ADDRESS control and change bus address. + /// + /// For most drivers this function should firstly call `accept()` and then change the bus address. + /// However, there are peripherals (Synopsys USB OTG) that have reverse order. + async fn accept_set_address(&mut self, addr: u8); } pub trait EndpointIn: Endpoint { diff --git a/embassy-usb/src/lib.rs b/embassy-usb/src/lib.rs index 661b8411..096e8b07 100644 --- a/embassy-usb/src/lib.rs +++ b/embassy-usb/src/lib.rs @@ -122,10 +122,9 @@ struct Inner<'d, D: Driver<'d>> { /// Our device address, or 0 if none. address: u8, - /// When receiving a set addr control request, we have to apply it AFTER we've - /// finished handling the control request, as the status stage still has to be - /// handled with addr 0. - /// If true, do a set_addr after finishing the current control req. + /// SET_ADDRESS requests have special handling depending on the driver. + /// This flag indicates that requests must be handled by `ControlPipe::accept_set_address()` + /// instead of regular `accept()`. set_address_pending: bool, interfaces: Vec, MAX_INTERFACE_COUNT>, @@ -254,11 +253,6 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> { Direction::In => self.handle_control_in(req).await, Direction::Out => self.handle_control_out(req).await, } - - if self.inner.set_address_pending { - self.inner.bus.set_address(self.inner.address); - self.inner.set_address_pending = false; - } } async fn handle_control_in(&mut self, req: Request) { @@ -328,7 +322,14 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> { trace!(" control out data: {:02x?}", data); match self.inner.handle_control_out(req, data) { - OutResponse::Accepted => self.control.accept().await, + OutResponse::Accepted => { + if self.inner.set_address_pending { + self.control.accept_set_address(self.inner.address).await; + self.inner.set_address_pending = false; + } else { + self.control.accept().await + } + } OutResponse::Rejected => self.control.reject().await, } } @@ -655,7 +656,7 @@ impl<'d, D: Driver<'d>> Inner<'d, D> { buf[1] = descriptor_type::STRING; let mut pos = 2; for c in s.encode_utf16() { - if pos >= buf.len() { + if pos + 2 >= buf.len() { panic!("control buffer too small"); }