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#![macro_use]
#[cfg_attr(any(eth_v1a, eth_v1b, eth_v1c), path = "v1/mod.rs")]
#[cfg_attr(eth_v2, path = "v2/mod.rs")]
mod _version;
pub mod generic_smi;
use core::mem::MaybeUninit;
use core::task::Context;
use embassy_net_driver::{Capabilities, HardwareAddress, LinkState};
use embassy_sync::waitqueue::AtomicWaker;
pub use self::_version::{InterruptHandler, *};
#[allow(unused)]
const MTU: usize = 1514;
const TX_BUFFER_SIZE: usize = 1514;
const RX_BUFFER_SIZE: usize = 1536;
#[repr(C, align(8))]
#[derive(Copy, Clone)]
pub(crate) struct Packet<const N: usize>([u8; N]);
pub struct PacketQueue<const TX: usize, const RX: usize> {
tx_desc: [TDes; TX],
rx_desc: [RDes; RX],
tx_buf: [Packet<TX_BUFFER_SIZE>; TX],
rx_buf: [Packet<RX_BUFFER_SIZE>; RX],
}
impl<const TX: usize, const RX: usize> PacketQueue<TX, RX> {
pub const fn new() -> Self {
const NEW_TDES: TDes = TDes::new();
const NEW_RDES: RDes = RDes::new();
Self {
tx_desc: [NEW_TDES; TX],
rx_desc: [NEW_RDES; RX],
tx_buf: [Packet([0; TX_BUFFER_SIZE]); TX],
rx_buf: [Packet([0; RX_BUFFER_SIZE]); RX],
}
}
// Allow to initialize a Self without requiring it to go on the stack
pub fn init(this: &mut MaybeUninit<Self>) {
unsafe {
this.as_mut_ptr().write_bytes(0u8, 1);
}
}
}
static WAKER: AtomicWaker = AtomicWaker::new();
impl<'d, T: Instance, P: PHY> embassy_net_driver::Driver for Ethernet<'d, T, P> {
type RxToken<'a> = RxToken<'a, 'd> where Self: 'a;
type TxToken<'a> = TxToken<'a, 'd> where Self: 'a;
fn receive(&mut self, cx: &mut Context) -> Option<(Self::RxToken<'_>, Self::TxToken<'_>)> {
WAKER.register(cx.waker());
if self.rx.available().is_some() && self.tx.available().is_some() {
Some((RxToken { rx: &mut self.rx }, TxToken { tx: &mut self.tx }))
} else {
None
}
}
fn transmit(&mut self, cx: &mut Context) -> Option<Self::TxToken<'_>> {
WAKER.register(cx.waker());
if self.tx.available().is_some() {
Some(TxToken { tx: &mut self.tx })
} else {
None
}
}
fn capabilities(&self) -> Capabilities {
let mut caps = Capabilities::default();
caps.max_transmission_unit = MTU;
caps.max_burst_size = Some(self.tx.len());
caps
}
fn link_state(&mut self, cx: &mut Context) -> LinkState {
if self.phy.poll_link(&mut self.station_management, cx) {
LinkState::Up
} else {
LinkState::Down
}
}
fn hardware_address(&self) -> HardwareAddress {
HardwareAddress::Ethernet(self.mac_addr)
}
}
pub struct RxToken<'a, 'd> {
rx: &'a mut RDesRing<'d>,
}
impl<'a, 'd> embassy_net_driver::RxToken for RxToken<'a, 'd> {
fn consume<R, F>(self, f: F) -> R
where
F: FnOnce(&mut [u8]) -> R,
{
// NOTE(unwrap): we checked the queue wasn't full when creating the token.
let pkt = unwrap!(self.rx.available());
let r = f(pkt);
self.rx.pop_packet();
r
}
}
pub struct TxToken<'a, 'd> {
tx: &'a mut TDesRing<'d>,
}
impl<'a, 'd> embassy_net_driver::TxToken for TxToken<'a, 'd> {
fn consume<R, F>(self, len: usize, f: F) -> R
where
F: FnOnce(&mut [u8]) -> R,
{
// NOTE(unwrap): we checked the queue wasn't full when creating the token.
let pkt = unwrap!(self.tx.available());
let r = f(&mut pkt[..len]);
self.tx.transmit(len);
r
}
}
/// Station Management Interface (SMI) on an ethernet PHY
///
/// # Safety
///
/// The methods cannot move out of self
pub unsafe trait StationManagement {
/// Read a register over SMI.
fn smi_read(&mut self, reg: u8) -> u16;
/// Write a register over SMI.
fn smi_write(&mut self, reg: u8, val: u16);
}
/// Traits for an Ethernet PHY
///
/// # Safety
///
/// The methods cannot move S
pub unsafe trait PHY {
/// Reset PHY and wait for it to come out of reset.
fn phy_reset<S: StationManagement>(&mut self, sm: &mut S);
/// PHY initialisation.
fn phy_init<S: StationManagement>(&mut self, sm: &mut S);
/// Poll link to see if it is up and FD with 100Mbps
fn poll_link<S: StationManagement>(&mut self, sm: &mut S, cx: &mut Context) -> bool;
}
pub(crate) mod sealed {
pub trait Instance {
fn regs() -> crate::pac::eth::Eth;
}
}
pub trait Instance: sealed::Instance + Send + 'static {}
impl sealed::Instance for crate::peripherals::ETH {
fn regs() -> crate::pac::eth::Eth {
crate::pac::ETH
}
}
impl Instance for crate::peripherals::ETH {}
pin_trait!(RefClkPin, Instance);
pin_trait!(MDIOPin, Instance);
pin_trait!(MDCPin, Instance);
pin_trait!(CRSPin, Instance);
pin_trait!(RXD0Pin, Instance);
pin_trait!(RXD1Pin, Instance);
pin_trait!(TXD0Pin, Instance);
pin_trait!(TXD1Pin, Instance);
pin_trait!(TXEnPin, Instance);
|
