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[UCPD] Receive hard resets

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This commit is contained in:
Timo Kröger 2024-03-08 15:01:55 +01:00
parent b7972048a1
commit c1efcbba2d
1 changed files with 35 additions and 7 deletions
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42
embassy-stm32/src/ucpd.rs
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@ -181,8 +181,8 @@ impl<'d, T: Instance> Ucpd<'d, T> {
r.tx_ordsetr().write(|w| w.set_txordset(0b10001_11000_11000_11000));
r.cfgr1().modify(|w| {
// TODO: Currently only SOP messages are supported.
w.set_rxordseten(0x1);
// TODO: Currently only hard reset and SOP messages can be received.
w.set_rxordseten(0b1001);
// Enable DMA
w.set_txdmaen(true);
@ -195,6 +195,9 @@ impl<'d, T: Instance> Ucpd<'d, T> {
w.set_phyrxen(true);
});
// Enable hard reset receive interrupt.
r.imr().modify(|w| w.set_rxhrstdetie(true));
into_ref!(rx_dma, tx_dma);
let rx_dma_req = rx_dma.request();
let tx_dma_req = tx_dma.request();
@ -217,6 +220,9 @@ pub enum RxError {
/// Provided buffer was too small for the received message.
Overrun,
/// Hard Reset received before or during reception.
HardReset,
}
/// Transmit Error.
@ -225,6 +231,9 @@ pub enum RxError {
pub enum TxError {
/// Concurrent receive in progress or excessive noise on the line.
Discarded,
/// Hard Reset received before or during transmission.
HardReset,
}
/// Power Delivery (PD) PHY.
@ -252,7 +261,9 @@ impl<'d, T: Instance> PdPhy<'d, T> {
// Check if a message is already being received. If yes, wait until its
// done, ignore errors and try to receive the next message.
if r.sr().read().rxorddet() {
let _ = self.wait_rx_done().await;
if let Err(RxError::HardReset) = self.wait_rx_done().await {
return Err(RxError::HardReset);
}
r.rxdr().read(); // Clear the RX buffer.
}
@ -290,7 +301,12 @@ impl<'d, T: Instance> PdPhy<'d, T> {
poll_fn(|cx| {
let r = T::REGS;
let sr = r.sr().read();
if sr.rxmsgend() {
if sr.rxhrstdet() {
// Clean and re-enable hard reset receive interrupt.
r.icr().write(|w| w.set_rxhrstdetcf(true));
r.imr().modify(|w| w.set_rxhrstdetie(true));
Poll::Ready(Err(RxError::HardReset))
} else if sr.rxmsgend() {
let ret = if sr.rxovr() {
Err(RxError::Overrun)
} else if sr.rxerr() {
@ -326,7 +342,9 @@ impl<'d, T: Instance> PdPhy<'d, T> {
// might still be running because there is no way to abort an ongoing
// message transmission. Wait for it to finish but ignore errors.
if r.cr().read().txsend() {
let _ = self.wait_tx_done().await;
if let Err(TxError::HardReset) = self.wait_tx_done().await {
return Err(TxError::HardReset);
}
}
// Clear the TX interrupt flags.
@ -360,9 +378,15 @@ impl<'d, T: Instance> PdPhy<'d, T> {
let _on_drop = OnDrop::new(|| self.enable_tx_interrupts(false));
poll_fn(|cx| {
let r = T::REGS;
if r.sr().read().txmsgdisc() {
let sr = r.sr().read();
if sr.rxhrstdet() {
// Clean and re-enable hard reset receive interrupt.
r.icr().write(|w| w.set_rxhrstdetcf(true));
r.imr().modify(|w| w.set_rxhrstdetie(true));
Poll::Ready(Err(TxError::HardReset))
} else if sr.txmsgdisc() {
Poll::Ready(Err(TxError::Discarded))
} else if r.sr().read().txmsgsent() {
} else if sr.txmsgsent() {
Poll::Ready(Ok(()))
} else {
T::waker().register(cx.waker());
@ -398,6 +422,10 @@ impl<T: Instance> interrupt::typelevel::Handler<T::Interrupt> for InterruptHandl
});
}
if sr.rxhrstdet() {
r.imr().modify(|w| w.set_rxhrstdetie(false));
}
if sr.rxmsgend() {
r.imr().modify(|w| w.set_rxmsgendie(false));
}