83 lines
2.7 KiB
Rust
83 lines
2.7 KiB
Rust
//! Generic SMI Ethernet PHY
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use super::{StationManagement, PHY};
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#[allow(dead_code)]
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mod phy_consts {
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pub const PHY_REG_BCR: u8 = 0x00;
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pub const PHY_REG_BSR: u8 = 0x01;
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pub const PHY_REG_ID1: u8 = 0x02;
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pub const PHY_REG_ID2: u8 = 0x03;
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pub const PHY_REG_ANTX: u8 = 0x04;
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pub const PHY_REG_ANRX: u8 = 0x05;
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pub const PHY_REG_ANEXP: u8 = 0x06;
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pub const PHY_REG_ANNPTX: u8 = 0x07;
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pub const PHY_REG_ANNPRX: u8 = 0x08;
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pub const PHY_REG_CTL: u8 = 0x0D; // Ethernet PHY Register Control
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pub const PHY_REG_ADDAR: u8 = 0x0E; // Ethernet PHY Address or Data
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pub const PHY_REG_WUCSR: u16 = 0x8010;
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pub const PHY_REG_BCR_COLTEST: u16 = 1 << 7;
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pub const PHY_REG_BCR_FD: u16 = 1 << 8;
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pub const PHY_REG_BCR_ANRST: u16 = 1 << 9;
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pub const PHY_REG_BCR_ISOLATE: u16 = 1 << 10;
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pub const PHY_REG_BCR_POWERDN: u16 = 1 << 11;
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pub const PHY_REG_BCR_AN: u16 = 1 << 12;
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pub const PHY_REG_BCR_100M: u16 = 1 << 13;
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pub const PHY_REG_BCR_LOOPBACK: u16 = 1 << 14;
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pub const PHY_REG_BCR_RESET: u16 = 1 << 15;
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pub const PHY_REG_BSR_JABBER: u16 = 1 << 1;
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pub const PHY_REG_BSR_UP: u16 = 1 << 2;
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pub const PHY_REG_BSR_FAULT: u16 = 1 << 4;
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pub const PHY_REG_BSR_ANDONE: u16 = 1 << 5;
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}
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use self::phy_consts::*;
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/// Generic SMI Ethernet PHY
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pub struct GenericSMI;
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unsafe impl PHY for GenericSMI {
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/// Reset PHY and wait for it to come out of reset.
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fn phy_reset<S: StationManagement>(sm: &mut S) {
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sm.smi_write(PHY_REG_BCR, PHY_REG_BCR_RESET);
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while sm.smi_read(PHY_REG_BCR) & PHY_REG_BCR_RESET == PHY_REG_BCR_RESET {}
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}
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/// PHY initialisation.
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fn phy_init<S: StationManagement>(sm: &mut S) {
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// Clear WU CSR
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Self::smi_write_ext(sm, PHY_REG_WUCSR, 0);
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// Enable auto-negotiation
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sm.smi_write(PHY_REG_BCR, PHY_REG_BCR_AN | PHY_REG_BCR_ANRST | PHY_REG_BCR_100M);
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}
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fn poll_link<S: StationManagement>(sm: &mut S) -> bool {
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let bsr = sm.smi_read(PHY_REG_BSR);
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// No link without autonegotiate
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if bsr & PHY_REG_BSR_ANDONE == 0 {
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return false;
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}
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// No link if link is down
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if bsr & PHY_REG_BSR_UP == 0 {
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return false;
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}
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// Got link
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true
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}
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}
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/// Public functions for the PHY
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impl GenericSMI {
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// Writes a value to an extended PHY register in MMD address space
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fn smi_write_ext<S: StationManagement>(sm: &mut S, reg_addr: u16, reg_data: u16) {
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sm.smi_write(PHY_REG_CTL, 0x0003); // set address
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sm.smi_write(PHY_REG_ADDAR, reg_addr);
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sm.smi_write(PHY_REG_CTL, 0x4003); // set data
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sm.smi_write(PHY_REG_ADDAR, reg_data);
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}
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}
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