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zynq-rs
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eth: setup_gem0/1_clock()

This commit is contained in:
Astro 2019-06-25 21:50:15 +02:00
parent 5823d90db1
commit 9ab40daca2
1 changed files with 47 additions and 31 deletions
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78
src/eth/mod.rs
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@ -8,6 +8,7 @@ pub mod tx;
/// Size of all the buffers /// Size of all the buffers
pub const MTU: usize = 1536; pub const MTU: usize = 1536;
pub const IO_PLL: u32 = 1_000;
pub struct Eth<RX, TX> { pub struct Eth<RX, TX> {
regs: &'static mut regs::RegisterBlock, regs: &'static mut regs::RegisterBlock,
@ -140,43 +141,14 @@ impl Eth<(), ()> {
} }
pub fn gem0(macaddr: [u8; 6]) -> Self { pub fn gem0(macaddr: [u8; 6]) -> Self {
slcr::RegisterBlock::unlocked(|slcr| { Self::setup_gem0_clock(125);
slcr.gem0_clk_ctrl.write(
// 0x0050_0801: 8, 5: 100 Mb/s
slcr::ClkCtrl::zeroed()
.clkact(true)
.srcsel(slcr::PllSource::IoPll)
.divisor(8)
.divisor1(5)
);
// Enable gem0 ref clock
slcr.gem0_rclk_ctrl.write(
// 0x0000_0801
slcr::RclkCtrl::zeroed()
.clkact(true)
);
});
let regs = regs::RegisterBlock::gem0(); let regs = regs::RegisterBlock::gem0();
Self::from_regs(regs, macaddr) Self::from_regs(regs, macaddr)
} }
pub fn gem1(macaddr: [u8; 6]) -> Self { pub fn gem1(macaddr: [u8; 6]) -> Self {
slcr::RegisterBlock::unlocked(|slcr| { Self::setup_gem1_clock(125);
slcr.gem1_clk_ctrl.write(
// 0x0050_0801: 8, 5: 100 Mb/s
slcr::ClkCtrl::zeroed()
.clkact(true)
.srcsel(slcr::PllSource::IoPll)
.divisor(8)
.divisor1(5)
);
// Enable gem1 ref clock
slcr.gem1_rclk_ctrl.write(
slcr::RclkCtrl::zeroed()
.clkact(true)
);
});
let regs = regs::RegisterBlock::gem1(); let regs = regs::RegisterBlock::gem1();
Self::from_regs(regs, macaddr) Self::from_regs(regs, macaddr)
@ -194,6 +166,50 @@ impl Eth<(), ()> {
} }
impl<RX, TX> Eth<RX, TX> { impl<RX, TX> Eth<RX, TX> {
pub fn setup_gem0_clock(tx_clock: u32) {
let d0 = (IO_PLL / tx_clock).min(63);
let d1 = (IO_PLL / tx_clock / d0).min(63);
slcr::RegisterBlock::unlocked(|slcr| {
slcr.gem0_clk_ctrl.write(
// 0x0050_0801: 8, 5: 100 Mb/s
// ...: 8, 1: 1000 Mb/s
slcr::ClkCtrl::zeroed()
.clkact(true)
.srcsel(slcr::PllSource::IoPll)
.divisor(d0 as u8)
.divisor1(d1 as u8)
);
// Enable gem0 recv clock
slcr.gem0_rclk_ctrl.write(
// 0x0000_0801
slcr::RclkCtrl::zeroed()
.clkact(true)
);
});
}
pub fn setup_gem1_clock(tx_clock: u32) {
let d0 = (IO_PLL / tx_clock).min(63);
let d1 = (IO_PLL / tx_clock / d0).min(63);
slcr::RegisterBlock::unlocked(|slcr| {
slcr.gem1_clk_ctrl.write(
slcr::ClkCtrl::zeroed()
.clkact(true)
.srcsel(slcr::PllSource::IoPll)
.divisor(d0 as u8)
.divisor1(d1 as u8)
);
// Enable gem1 recv clock
slcr.gem1_rclk_ctrl.write(
// 0x0000_0801
slcr::RclkCtrl::zeroed()
.clkact(true)
);
});
}
fn init(mut self) -> Self { fn init(mut self) -> Self {
// Clear the Network Control register. // Clear the Network Control register.
self.regs.net_ctrl.write(regs::NetCtrl::zeroed()); self.regs.net_ctrl.write(regs::NetCtrl::zeroed());