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Unify Si5324 setup code with main ARTIQ repository [nfc] 

I chose the version from the main repository for two
reasons:
 - Explicitly specifying si5324_ref_input every time would
   not work for the different Kasli/… hardware versions.
 - Having `crystal_ref` as a setting in the configuration
   is misleading if it does not actually activate the crystal
   for use as a reference (but rather does
   `route_crystal_to_ckin2`).

Related m-labs/artiq commits:
 - 740543d4e284245248e3ff838c46505938dcae7a
 - 3c7a394eff553ab75a7ea78bdd17830366504dc6
This commit is contained in:
David Nadlinger 2022-12-12 23:17:49 +00:00
parent c281505aa0
commit 5c054cc901
2 changed files with 85 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/libboard_artiq/src/si5324.rs
View File

@ -219,8 +219,11 @@ pub fn bypass(i2c: &mut I2c, input: Input, timer: &mut GlobalTimer) -> Result<()
Ok(())
}
pub fn setup(i2c: &mut I2c, settings: &FrequencySettings, input: Input, timer: &mut GlobalTimer) -> Result<()> {
pub fn setup(i2c: &mut I2c, settings: &FrequencySettings, ext_input: Input, timer: &mut GlobalTimer) -> Result<()> {
let s = map_frequency_settings(settings)?;
// FREE_RUN=1 routes XA/XB to CKIN2.
let input = if settings.crystal_ref { Input::Ckin2 } else { ext_input };
let cksel_reg = match input {
Input::Ckin1 => 0b00,
Input::Ckin2 => 0b01,

54
src/runtime/src/rtio_clocking.rs
View File

@ -115,12 +115,15 @@ fn init_drtio(timer: &mut GlobalTimer)
}
}
// Si5324 input to select for locking to an external clock.
#[cfg(has_si5324)]
const SI5324_EXT_INPUT: si5324::Input = si5324::Input::Ckin1;
#[cfg(has_si5324)]
fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
let (si5324_settings, si5324_ref_input) = match clk {
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,
@ -130,13 +133,10 @@ fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
n32 : 6,
bwsel : 4,
crystal_ref: false
},
si5324::Input::Ckin1
)
}
},
RtioClock::Ext0_Synth0_100to125 => { // 125MHz output, from 100MHz CLKINx reference, 586 Hz loop bandwidth
info!("using 100MHz reference to make 125MHz RTIO clock with PLL");
(
si5324::FrequencySettings {
n1_hs : 10,
nc1_ls : 4,
@ -146,13 +146,10 @@ fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
n32 : 52,
bwsel : 4,
crystal_ref: false
},
si5324::Input::Ckin1
)
}
},
RtioClock::Ext0_Synth0_125to125 => { // 125MHz output, from 125MHz CLKINx reference, 606 Hz loop bandwidth
info!("using 125MHz reference to make 125MHz RTIO clock with PLL");
(
si5324::FrequencySettings {
n1_hs : 5,
nc1_ls : 8,
@ -162,13 +159,10 @@ fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
n32 : 63,
bwsel : 4,
crystal_ref: false
},
si5324::Input::Ckin1
)
}
},
RtioClock::Int_150 => { // 150MHz output, from crystal
info!("using internal 150MHz RTIO clock");
(
si5324::FrequencySettings {
n1_hs : 9,
nc1_ls : 4,
@ -178,13 +172,10 @@ fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
n32 : 7139,
bwsel : 3,
crystal_ref: true
}
},
si5324::Input::Ckin2
)
},
RtioClock::Int_100 => { // 100MHz output, from crystal.
RtioClock::Int_100 => { // 100MHz output, from crystal
info!("using internal 100MHz RTIO clock");
(
si5324::FrequencySettings {
n1_hs : 9,
nc1_ls : 6,
@ -194,13 +185,10 @@ fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
n32 : 7139,
bwsel : 3,
crystal_ref: true
},
si5324::Input::Ckin2
)
}
},
RtioClock::Int_125 => { // 125MHz output, from crystal, 7 Hz
info!("using internal 125MHz RTIO clock");
(
si5324::FrequencySettings {
n1_hs : 10,
nc1_ls : 4,
@ -210,13 +198,10 @@ fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
n32 : 4565,
bwsel : 4,
crystal_ref: true
},
si5324::Input::Ckin2
)
},
_ => { // same setting as Int_125, but fallback to default
warn!("rtio_clock setting '{:?}' is unsupported. Falling back to default internal 125MHz RTIO clock.", clk);
(
}
}
_ => { // 125MHz output like above, default (if chosen option is not supported)
warn!("rtio_clock setting '{:?}' is not supported. Falling back to default internal 125MHz RTIO clock.", clk);
si5324::FrequencySettings {
n1_hs : 10,
nc1_ls : 4,
@ -226,12 +211,10 @@ fn setup_si5324(i2c: &mut I2c, timer: &mut GlobalTimer, clk: RtioClock) {
n32 : 4565,
bwsel : 4,
crystal_ref: true
},
si5324::Input::Ckin2
)
}
}
};
si5324::setup(i2c, &si5324_settings, si5324_ref_input, timer).expect("cannot initialize Si5324");
si5324::setup(i2c, &si5324_settings, SI5324_EXT_INPUT, timer).expect("cannot initialize Si5324");
}
pub fn init(timer: &mut GlobalTimer, cfg: &Config) {
@ -240,9 +223,8 @@ pub fn init(timer: &mut GlobalTimer, cfg: &Config) {
#[cfg(has_si5324)]
{
let i2c = unsafe { (&mut i2c::I2C_BUS).as_mut().unwrap() };
let si5324_ext_input = si5324::Input::Ckin1;
match clk {
RtioClock::Ext0_Bypass => si5324::bypass(i2c, si5324_ext_input, timer).expect("cannot bypass Si5324"),
RtioClock::Ext0_Bypass => si5324::bypass(i2c, SI5324_EXT_INPUT, timer).expect("cannot bypass Si5324"),
_ => setup_si5324(i2c, timer, clk),
}
}