diff --git a/src/gateware/zc706.py b/src/gateware/zc706.py
index 3432b187..a60d72d4 100755
--- a/src/gateware/zc706.py
+++ b/src/gateware/zc706.py
@@ -456,6 +456,7 @@ class Satellite(SoCCore):
         self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
         self.csr_devices.append("si5324_rst_n")
         self.rustc_cfg["has_si5324"] = None
+        self.rustc_cfg["has_siphaser"] = None
 
         rtio_clk_period = 1e9/self.drtio_transceiver.rtio_clk_freq
         # Constrain TX & RX timing for the first transceiver channel
diff --git a/src/libboard_artiq/src/lib.rs b/src/libboard_artiq/src/lib.rs
index 0aca5b59..580ade71 100644
--- a/src/libboard_artiq/src/lib.rs
+++ b/src/libboard_artiq/src/lib.rs
@@ -33,9 +33,6 @@ pub mod logger;
 #[cfg(has_si5324)]
 pub mod si5324;
 
-#[cfg(has_siphaser)]
-pub mod siphaser;
-
 use core::{cmp, str};
 use libboard_zynq::slcr;
 use libregister::RegisterW;
diff --git a/src/libboard_artiq/src/si5324.rs b/src/libboard_artiq/src/si5324.rs
index f7fc683a..de11427a 100644
--- a/src/libboard_artiq/src/si5324.rs
+++ b/src/libboard_artiq/src/si5324.rs
@@ -279,16 +279,18 @@ pub mod siphaser {
     use pl::csr;
 
     pub fn select_recovered_clock(i2c: &mut I2c, rc: bool, timer: &mut GlobalTimer) -> Result<()> {
-        write(i2c, 3,   (read(3)? & 0xdf) | (1 << 5))?;  // DHOLD=1
+        let val = read(i2c, 3)?;
+        write(i2c, 3,   (val & 0xdf) | (1 << 5))?;  // DHOLD=1
         unsafe {
             csr::siphaser::switch_clocks_write(if rc { 1 } else { 0 });
         }
-        write(i2c, 3,   (read(3)? & 0xdf) | (0 << 5))?;  // DHOLD=0
-        monitor_lock(timer)?;
+        let val = read(i2c, 3)?;
+        write(i2c, 3,   (val & 0xdf) | (0 << 5))?;  // DHOLD=0
+        monitor_lock(i2c, timer)?;
         Ok(())
     }
 
-    fn phase_shift(direction: u8, timer: GlobalTimer) {
+    fn phase_shift(direction: u8, timer: &mut GlobalTimer) {
         unsafe {
             csr::siphaser::phase_shift_write(direction);
             while csr::siphaser::phase_shift_done_read() == 0 {}
@@ -297,7 +299,7 @@ pub mod siphaser {
         timer.delay_us(500);
     }
 
-    fn has_error(timer: GlobalTimer) -> bool {
+    fn has_error(timer: &mut GlobalTimer) -> bool {
         unsafe {
             csr::siphaser::error_write(1);
         }
diff --git a/src/satman/src/main.rs b/src/satman/src/main.rs
index 3a4f1884..0eeadf84 100644
--- a/src/satman/src/main.rs
+++ b/src/satman/src/main.rs
@@ -485,6 +485,11 @@ pub extern fn main_core0() -> i32 {
 
     let mut hardware_tick_ts = 0;
 
+    print!("all set");
+
+    unsafe {
+        info!("rx_disable_read: {}, rx_up_read: {}", csr::drtiosat::rx_disable_read(), csr::drtiosat::rx_up_read());
+    }
     loop {
         while !drtiosat_link_rx_up() {
             drtiosat_process_errors();
@@ -493,13 +498,17 @@ pub extern fn main_core0() -> i32 {
                 rep.service(&routing_table, rank, &mut timer);
             }
             hardware_tick(&mut hardware_tick_ts, &mut timer);
+            unsafe {
+                info!("rx_disable_read: {}, rx_up_read: {}", csr::drtiosat::rx_disable_read(), csr::drtiosat::rx_up_read());
+            }
+            timer.delay_us(1000_000);
         }
 
         info!("uplink is up, switching to recovered clock");
         #[cfg(has_siphaser)]
         {
-            si5324::siphaser::select_recovered_clock(true).expect("failed to switch clocks");
-            si5324::siphaser::calibrate_skew().expect("failed to calibrate skew");
+            si5324::siphaser::select_recovered_clock(&mut i2c, true, &mut timer).expect("failed to switch clocks");
+            si5324::siphaser::calibrate_skew(&mut timer).expect("failed to calibrate skew");
         }
 
         drtioaux::reset(0);
@@ -532,7 +541,7 @@ pub extern fn main_core0() -> i32 {
         drtiosat_tsc_loaded();
         info!("uplink is down, switching to local oscillator clock");
         #[cfg(has_siphaser)]
-        si5324::siphaser::select_recovered_clock(false).expect("failed to switch clocks");
+        si5324::siphaser::select_recovered_clock(&mut i2c, false, &mut timer).expect("failed to switch clocks");
     }
 }