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Firmware: runtime WRPLL

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runtime: enable WRPLL interrupt
runtime: add WRPLL interrupt handler
rtio_clocking: add main si549 setup
rtio_clocking: add 125Mhz wrpll refclk & helper si549 setup
This commit is contained in:
morgan 2024-05-24 11:17:50 +08:00 committed by Sébastien Bourdeauducq
parent 44cfacf2c4
commit 49e402780b
2 changed files with 183 additions and 9 deletions
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11
artiq/firmware/runtime/main.rs
View File

@ -44,6 +44,8 @@ use board_artiq::drtioaux;
use board_artiq::drtio_routing;
use board_artiq::{mailbox, rpc_queue};
use proto_artiq::{mgmt_proto, moninj_proto, rpc_proto, session_proto, kernel_proto};
#[cfg(has_wrpll)]
use board_artiq::si549;
#[cfg(has_drtio_eem)]
use board_artiq::drtio_eem;
#[cfg(has_rtio_analyzer)]
@ -269,6 +271,8 @@ pub extern fn main() -> i32 {
#[cfg(soc_platform = "kasli")]
irq::enable_interrupts();
#[cfg(has_wrpll)]
irq::enable(csr::WRPLL_INTERRUPT);
logger_artiq::BufferLogger::new(&mut LOG_BUFFER[..]).register(||
boot::start_user(startup as usize)
@ -304,8 +308,11 @@ pub extern fn exception(regs: *const TrapFrame) {
let pc = mepc::read();
let cause = mcause::read().cause();
match cause {
mcause::Trap::Interrupt(source) => {
info!("Called interrupt with {:?}", source);
mcause::Trap::Interrupt(_source) => {
#[cfg(has_wrpll)]
if irq::is_pending(csr::WRPLL_INTERRUPT) {
si549::wrpll::interrupt_handler();
}
},
mcause::Trap::Exception(mcause::Exception::UserEnvCall) => {

181
artiq/firmware/runtime/rtio_clocking.rs
View File

@ -1,8 +1,11 @@
use board_misoc::config;
#[cfg(has_si5324)]
use board_artiq::si5324;
#[cfg(has_si549)]
use board_artiq::si549;
use board_misoc::{csr, clock};
#[derive(Debug, PartialEq)]
#[derive(Debug, PartialEq, Copy, Clone)]
#[allow(non_camel_case_types)]
pub enum RtioClock {
Default,
@ -89,13 +92,14 @@ pub mod crg {
// Si5324 input to select for locking to an external clock (as opposed to
// a recovered link clock in DRTIO satellites, which is handled elsewhere).
#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
#[cfg(all(has_si5324, soc_platform = "kasli", hw_rev = "v2.0"))]
const SI5324_EXT_INPUT: si5324::Input = si5324::Input::Ckin1;
#[cfg(all(soc_platform = "kasli", not(hw_rev = "v2.0")))]
#[cfg(all(has_si5324, soc_platform = "kasli", not(hw_rev = "v2.0")))]
const SI5324_EXT_INPUT: si5324::Input = si5324::Input::Ckin2;
#[cfg(all(soc_platform = "kc705"))]
#[cfg(all(has_si5324, soc_platform = "kc705"))]
const SI5324_EXT_INPUT: si5324::Input = si5324::Input::Ckin2;
#[cfg(has_si5324)]
fn setup_si5324_pll(cfg: RtioClock) {
let (si5324_settings, si5324_ref_input) = match cfg {
RtioClock::Ext0_Synth0_10to125 => { // 125 MHz output from 10 MHz CLKINx reference, 504 Hz BW
@ -214,7 +218,7 @@ fn setup_si5324_pll(cfg: RtioClock) {
si5324::setup(&si5324_settings, si5324_ref_input).expect("cannot initialize Si5324");
}
fn setup_si5324(clock_cfg: RtioClock) {
fn sysclk_setup(clock_cfg: RtioClock) {
let switched = unsafe {
csr::crg::switch_done_read()
};
@ -222,6 +226,8 @@ fn setup_si5324(clock_cfg: RtioClock) {
info!("Clocking has already been set up.");
return;
}
#[cfg(has_si5324)]
match clock_cfg {
RtioClock::Ext0_Bypass => {
info!("using external RTIO clock with PLL bypass");
@ -230,7 +236,10 @@ fn setup_si5324(clock_cfg: RtioClock) {
_ => setup_si5324_pll(clock_cfg),
}
// switch sysclk source to si5324
#[cfg(has_si549)]
si549::main_setup(&get_si549_setting(clock_cfg)).expect("cannot initialize main Si549");
// switch sysclk source
#[cfg(not(has_drtio))]
{
info!("Switching sys clock, rebooting...");
@ -244,9 +253,153 @@ fn setup_si5324(clock_cfg: RtioClock) {
}
#[cfg(all(has_si549, has_wrpll))]
fn wrpll_setup(clk: RtioClock, si549_settings: &si549::FrequencySetting) {
// register values are directly copied from preconfigured mmcm
let (mmcm_setting, mmcm_bypass) = match clk {
RtioClock::Ext0_Synth0_10to125 => (
si549::wrpll_refclk::MmcmSetting {
// CLKFBOUT_MULT = 62.5, DIVCLK_DIVIDE = 1 , CLKOUT0_DIVIDE = 5
clkout0_reg1: 0x1083,
clkout0_reg2: 0x0080,
clkfbout_reg1: 0x179e,
clkfbout_reg2: 0x4c00,
div_reg: 0x1041,
lock_reg1: 0x00fa,
lock_reg2: 0x7c01,
lock_reg3: 0xffe9,
power_reg: 0x9900,
filt_reg1: 0x1008,
filt_reg2: 0x8800,
},
false,
),
RtioClock::Ext0_Synth0_80to125 => (
si549::wrpll_refclk::MmcmSetting {
// CLKFBOUT_MULT = 15.625, DIVCLK_DIVIDE = 1 , CLKOUT0_DIVIDE = 10
clkout0_reg1: 0x1145,
clkout0_reg2: 0x0000,
clkfbout_reg1: 0x11c7,
clkfbout_reg2: 0x5880,
div_reg: 0x1041,
lock_reg1: 0x028a,
lock_reg2: 0x7c01,
lock_reg3: 0xffe9,
power_reg: 0x9900,
filt_reg1: 0x9908,
filt_reg2: 0x8100,
},
false,
),
RtioClock::Ext0_Synth0_100to125 => (
si549::wrpll_refclk::MmcmSetting {
// CLKFBOUT_MULT = 12.5, DIVCLK_DIVIDE = 1 , CLKOUT0_DIVIDE = 10
clkout0_reg1: 0x1145,
clkout0_reg2: 0x0000,
clkfbout_reg1: 0x1145,
clkfbout_reg2: 0x4c00,
div_reg: 0x1041,
lock_reg1: 0x0339,
lock_reg2: 0x7c01,
lock_reg3: 0xffe9,
power_reg: 0x9900,
filt_reg1: 0x9108,
filt_reg2: 0x0100,
},
false,
),
RtioClock::Ext0_Synth0_125to125 => (
si549::wrpll_refclk::MmcmSetting {
// CLKFBOUT_MULT = 10, DIVCLK_DIVIDE = 1 , CLKOUT0_DIVIDE = 10
clkout0_reg1: 0x1145,
clkout0_reg2: 0x0000,
clkfbout_reg1: 0x1145,
clkfbout_reg2: 0x0000,
div_reg: 0x1041,
lock_reg1: 0x03e8,
lock_reg2: 0x7001,
lock_reg3: 0xf3e9,
power_reg: 0x0100,
filt_reg1: 0x9908,
filt_reg2: 0x1100,
},
true,
),
_ => unreachable!(),
};
si549::helper_setup(&si549_settings).expect("cannot initialize helper Si549");
si549::wrpll_refclk::setup(mmcm_setting, mmcm_bypass).expect("cannot initialize ref clk for wrpll");
si549::wrpll::select_recovered_clock(true);
}
#[cfg(has_si549)]
fn get_si549_setting(clk: RtioClock) -> si549::FrequencySetting {
match clk {
RtioClock::Ext0_Synth0_10to125 => {
info!("using 10MHz reference to make 125MHz RTIO clock with WRPLL");
}
RtioClock::Ext0_Synth0_80to125 => {
info!("using 80MHz reference to make 125MHz RTIO clock with WRPLL");
}
RtioClock::Ext0_Synth0_100to125 => {
info!("using 100MHz reference to make 125MHz RTIO clock with WRPLL");
}
RtioClock::Ext0_Synth0_125to125 => {
info!("using 125MHz reference to make 125MHz RTIO clock with WRPLL");
}
RtioClock::Int_100 => {
info!("using internal 100MHz RTIO clock");
}
RtioClock::Int_125 => {
info!("using internal 125MHz RTIO clock");
}
_ => {
warn!(
"rtio_clock setting '{:?}' is unsupported. Falling back to default internal 125MHz RTIO clock.",
clk
);
}
};
match clk {
RtioClock::Int_100 => {
si549::FrequencySetting {
main: si549::DividerConfig {
hsdiv: 0x06C,
lsdiv: 0,
fbdiv: 0x046C5F49797,
},
helper: si549::DividerConfig {
// 100MHz*32767/32768
hsdiv: 0x06C,
lsdiv: 0,
fbdiv: 0x046C5670BBD,
},
}
}
_ => {
// Everything else use 125MHz
si549::FrequencySetting {
main: si549::DividerConfig {
hsdiv: 0x058,
lsdiv: 0,
fbdiv: 0x04815791F25,
},
helper: si549::DividerConfig {
// 125MHz*32767/32768
hsdiv: 0x058,
lsdiv: 0,
fbdiv: 0x04814E8F442,
},
}
}
}
}
pub fn init() {
let clock_cfg = get_rtio_clock_cfg();
setup_si5324(clock_cfg);
sysclk_setup(clock_cfg);
#[cfg(has_drtio)]
{
@ -282,4 +435,18 @@ pub fn init() {
error!("RTIO clock failed");
}
}
#[cfg(all(has_si549, has_wrpll))]
{
// SYS CLK switch will reset CSRs that are used by WRPLL
match clock_cfg {
RtioClock::Ext0_Synth0_10to125
| RtioClock::Ext0_Synth0_80to125
| RtioClock::Ext0_Synth0_100to125
| RtioClock::Ext0_Synth0_125to125 => {
wrpll_setup(clock_cfg, &get_si549_setting(clock_cfg));
}
_ => {}
}
}
}