forked from M-Labs/artiq-zynq
upgrade to new clock configuration system (#152)
As mentioned in https://github.com/m-labs/artiq/issues/1735 - this is the Zynq version. Reviewed-on: M-Labs/artiq-zynq#152 Co-authored-by: mwojcik <mw@m-labs.hk> Co-committed-by: mwojcik <mw@m-labs.hk>exception
parent
e8db2a4b49
commit
8be5048cd3
@ -0,0 +1,224 @@
|
||||
use log::{info, warn};
|
||||
use libboard_zynq::timer::GlobalTimer;
|
||||
use embedded_hal::blocking::delay::DelayMs;
|
||||
use libconfig::Config;
|
||||
use libboard_artiq::pl;
|
||||
#[cfg(has_si5324)]
|
||||
use libboard_zynq::i2c::I2c;
|
||||
#[cfg(has_si5324)]
|
||||
use crate::i2c;
|
||||
#[cfg(has_si5324)]
|
||||
use libboard_artiq::si5324;
|
||||
|
||||
#[derive(Debug, PartialEq, Copy, Clone)]
|
||||
#[allow(non_camel_case_types)]
|
||||
pub enum RtioClock {
|
||||
Default,
|
||||
Int_125,
|
||||
Int_100,
|
||||
Int_150,
|
||||
Ext0_Bypass,
|
||||
Ext0_Synth0_10to125,
|
||||
Ext0_Synth0_100to125,
|
||||
Ext0_Synth0_125to125,
|
||||
}
|
||||
|
||||
fn get_rtio_clock_cfg(cfg: &Config) -> RtioClock {
|
||||
let mut res = RtioClock::Default;
|
||||
if let Ok(clk) = cfg.read_str("rtio_clock") {
|
||||
res = match clk.as_ref() {
|
||||
"int_125" => RtioClock::Int_125,
|
||||
"int_100" => RtioClock::Int_100,
|
||||
"int_150" => RtioClock::Int_150,
|
||||
"ext0_bypass" => RtioClock::Ext0_Bypass,
|
||||
"ext0_bypass_125" => RtioClock::Ext0_Bypass,
|
||||
"ext0_bypass_100" => RtioClock::Ext0_Bypass,
|
||||
"ext0_synth0_10to125" => RtioClock::Ext0_Synth0_10to125,
|
||||
"ext0_synth0_100to125" => RtioClock::Ext0_Synth0_100to125,
|
||||
"ext0_synth0_125to125" => RtioClock::Ext0_Synth0_125to125,
|
||||
_ => {
|
||||
warn!("Unrecognised rtio_clock setting. Falling back to default.");
|
||||
RtioClock::Default
|
||||
}
|
||||
};
|
||||
}
|
||||
else {
|
||||
warn!("error reading configuration. Falling back to default.");
|
||||
}
|
||||
if res == RtioClock::Default {
|
||||
warn!("Using default configuration - internal 125MHz RTIO clock.");
|
||||
return RtioClock::Int_125;
|
||||
}
|
||||
res
|
||||
}
|
||||
|
||||
|
||||
fn init_rtio(timer: &mut GlobalTimer, _clk: RtioClock) {
|
||||
#[cfg(has_rtio_crg_clock_sel)]
|
||||
let clock_sel = match _clk {
|
||||
RtioClock::Ext0_Bypass => {
|
||||
info!("Using bypassed external clock");
|
||||
1
|
||||
},
|
||||
RtioClock::Int_125 => {
|
||||
info!("Using internal RTIO clock");
|
||||
0
|
||||
},
|
||||
_ => {
|
||||
warn!("rtio_clock setting '{:?}' is not supported. Using default internal RTIO clock instead", _clk);
|
||||
0
|
||||
}
|
||||
};
|
||||
|
||||
loop {
|
||||
unsafe {
|
||||
pl::csr::rtio_crg::pll_reset_write(1);
|
||||
#[cfg(has_rtio_crg_clock_sel)]
|
||||
pl::csr::rtio_crg::clock_sel_write(clock_sel);
|
||||
pl::csr::rtio_crg::pll_reset_write(0);
|
||||
}
|
||||
timer.delay_ms(1);
|
||||
let locked = unsafe { pl::csr::rtio_crg::pll_locked_read() != 0 };
|
||||
if locked {
|
||||
info!("RTIO PLL locked");
|
||||
break;
|
||||
} else {
|
||||
warn!("RTIO PLL failed to lock, retrying...");
|
||||
timer.delay_ms(500);
|
||||
}
|
||||
}
|
||||
|
||||
unsafe {
|
||||
pl::csr::rtio_core::reset_phy_write(1);
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(has_drtio)]
|
||||
fn init_drtio(timer: &mut GlobalTimer)
|
||||
{
|
||||
unsafe {
|
||||
pl::csr::drtio_transceiver::stable_clkin_write(1);
|
||||
}
|
||||
timer.delay_ms(2); // wait for CPLL/QPLL lock
|
||||
unsafe {
|
||||
pl::csr::drtio_transceiver::txenable_write(0xffffffffu32 as _);
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(has_si5324)]
|
||||
fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
|
||||
let si5324_settings = match clk {
|
||||
RtioClock::Ext0_Synth0_10to125 => { // 125 MHz output from 10 MHz CLKINx reference, 504 Hz BW
|
||||
info!("using 10MHz reference to make 125MHz RTIO clock with PLL");
|
||||
si5324::FrequencySettings {
|
||||
n1_hs : 10,
|
||||
nc1_ls : 4,
|
||||
n2_hs : 10,
|
||||
n2_ls : 300,
|
||||
n31 : 6,
|
||||
n32 : 6,
|
||||
bwsel : 4,
|
||||
crystal_ref: false
|
||||
}
|
||||
},
|
||||
RtioClock::Ext0_Synth0_100to125 => { // 125MHz output, from 100MHz CLKINx reference, 586 Hz loop bandwidth
|
||||
info!("using 10MHz reference to make 125MHz RTIO clock with PLL");
|
||||
si5324::FrequencySettings {
|
||||
n1_hs : 10,
|
||||
nc1_ls : 4,
|
||||
n2_hs : 10,
|
||||
n2_ls : 260,
|
||||
n31 : 52,
|
||||
n32 : 52,
|
||||
bwsel : 4,
|
||||
crystal_ref: false
|
||||
}
|
||||
},
|
||||
RtioClock::Ext0_Synth0_125to125 => { // 125MHz output, from 125MHz CLKINx reference, 606 Hz loop bandwidth
|
||||
info!("using 10MHz reference to make 125MHz RTIO clock with PLL");
|
||||
si5324::FrequencySettings {
|
||||
n1_hs : 5,
|
||||
nc1_ls : 8,
|
||||
n2_hs : 7,
|
||||
n2_ls : 360,
|
||||
n31 : 63,
|
||||
n32 : 63,
|
||||
bwsel : 4,
|
||||
crystal_ref: false
|
||||
}
|
||||
},
|
||||
RtioClock::Int_150 => { // 150MHz output, from crystal
|
||||
info!("using internal 150MHz RTIO clock");
|
||||
si5324::FrequencySettings {
|
||||
n1_hs : 9,
|
||||
nc1_ls : 4,
|
||||
n2_hs : 10,
|
||||
n2_ls : 33732,
|
||||
n31 : 7139,
|
||||
n32 : 7139,
|
||||
bwsel : 3,
|
||||
crystal_ref: true
|
||||
}
|
||||
},
|
||||
RtioClock::Int_100 => { // 100MHz output, from crystal.
|
||||
info!("using internal 100MHz RTIO clock");
|
||||
si5324::FrequencySettings {
|
||||
n1_hs : 9,
|
||||
nc1_ls : 6,
|
||||
n2_hs : 10,
|
||||
n2_ls : 33732,
|
||||
n31 : 7139,
|
||||
n32 : 7139,
|
||||
bwsel : 3,
|
||||
crystal_ref: true
|
||||
}
|
||||
},
|
||||
RtioClock::Int_125 => { // 125MHz output, from crystal, 7 Hz
|
||||
info!("using internal 125MHz RTIO clock");
|
||||
si5324::FrequencySettings {
|
||||
n1_hs : 10,
|
||||
nc1_ls : 4,
|
||||
n2_hs : 10,
|
||||
n2_ls : 19972,
|
||||
n31 : 4565,
|
||||
n32 : 4565,
|
||||
bwsel : 4,
|
||||
crystal_ref: true
|
||||
}
|
||||
}
|
||||
_ => { // same setting as Int_125, but fallback to default
|
||||
warn!("rtio_clock setting '{:?}' is unsupported. Falling back to default internal 125MHz RTIO clock.", clk);
|
||||
si5324::FrequencySettings {
|
||||
n1_hs : 10,
|
||||
nc1_ls : 4,
|
||||
n2_hs : 10,
|
||||
n2_ls : 19972,
|
||||
n31 : 4565,
|
||||
n32 : 4565,
|
||||
bwsel : 4,
|
||||
crystal_ref: true
|
||||
}
|
||||
}
|
||||
};
|
||||
let si5324_ref_input = si5324::Input::Ckin2;
|
||||
si5324::setup(i2c, &si5324_settings, si5324_ref_input, timer).expect("cannot initialize Si5324");
|
||||
}
|
||||
|
||||
pub fn init(timer: &mut GlobalTimer, cfg: &Config) {
|
||||
|
||||
let clk = get_rtio_clock_cfg(cfg);
|
||||
#[cfg(has_si5324)]
|
||||
{
|
||||
let i2c = unsafe { (&mut i2c::I2C_BUS).as_mut().unwrap() };
|
||||
let si5324_ext_input = si5324::Input::Ckin2;
|
||||
match clk {
|
||||
RtioClock::Ext0_Bypass => si5324::bypass(i2c, si5324_ext_input, timer).expect("cannot bypass Si5324"),
|
||||
_ => setup_si5324(i2c, timer, clk),
|
||||
}
|
||||
}
|
||||
#[cfg(has_drtio)]
|
||||
init_drtio(timer);
|
||||
|
||||
init_rtio(timer, clk);
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue