eth: find Phy

This commit is contained in:
Astro 2019-06-19 00:21:17 +02:00
parent 54d0f3583d
commit b3b65f9b74
3 changed files with 82 additions and 8 deletions

28
src/eth/phy/id.rs Normal file
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@ -0,0 +1,28 @@
use bit_field::BitField;
use super::PhyAccess;
#[derive(Clone, Debug)]
pub struct PhyIdentifier {
pub oui: u32,
pub model: u8,
pub rev: u8,
}
pub fn identify_phy<PA: PhyAccess>(pa: &mut PA, addr: u8) -> Option<PhyIdentifier> {
let id1 = pa.read_phy(addr, 2);
let id2 = pa.read_phy(addr, 3);
if id1 != 0xFFFF || id2 != 0xFFFF {
let mut oui = 0;
oui.set_bits(6..=21, id1.get_bits(0..=15).into());
oui.set_bits(0..=5, id2.get_bits(10..=15).into());
Some(PhyIdentifier {
oui,
model: id2.get_bits(4..=9) as u8,
rev: id2.get_bits(0..=3) as u8,
})
} else {
None
}
}

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@ -1,8 +1,45 @@
pub mod id;
use id::{identify_phy, PhyIdentifier};
pub trait PhyAccess {
fn read_phy(&mut self, addr: u8, reg: u8) -> u16;
fn write_phy(&mut self, addr: u8, reg: u8, data: u16);
}
pub trait PhyDevice {
fn init() -> Self;
pub enum Phy {
Marvel88E1116R,
Rtl8211E,
}
const OUI_MARVEL: u32 = 0x005043;
const OUI_REALTEK: u32 = 0x000732;
impl Phy {
/// Probe all addresses on MDIO for a known PHY
pub fn find<PA: PhyAccess>(pa: &mut PA) -> Option<(u8, Phy)> {
for addr in 1..32 {
match identify_phy(pa, addr) {
Some(PhyIdentifier {
oui: OUI_MARVEL,
model: 36,
..
}) => return Some((addr, Phy::Marvel88E1116R)),
Some(PhyIdentifier {
oui: OUI_REALTEK,
model: 0b010001,
rev: 0b0101,
}) => return Some((addr, Phy::Rtl8211E)),
_ => {}
}
}
None
}
pub fn name(&self) -> &'static str {
match self {
Phy::Marvel88E1116R => &"Marvel 88E1116R",
Phy::Rtl8211E => &"RTL8211E",
}
}
}

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@ -79,12 +79,21 @@ fn main() {
let mut eth = eth::Eth::default([0x0, 0x17, 0xde, 0xea, 0xbe, 0xef]);
writeln!(uart, "Eth on\r");
match eth::phy::Phy::find(&mut eth) {
Some((addr, phy)) => {
writeln!(uart, "Found {} PHY at addr {}\r", phy.name(), addr);
}
None => {
use eth::phy::PhyAccess;
for addr in 1..=31 {
let detect = eth.read_phy(addr, 1);
let id1 = eth.read_phy(addr, 2);
let id2 = eth.read_phy(addr, 3);
writeln!(uart, "phy {}: {:04X} {:04X} {:04X}\r", addr, detect, id1, id2);
for addr in 1..32 {
match eth::phy::id::identify_phy(&mut eth, addr) {
Some(identifier) => {
writeln!(uart, "phy {}: {:?}\r", addr, identifier);
}
None => {}
}
}
}
}
while !uart.tx_fifo_empty() {}