diff --git a/artiq/runtime.rs/libksupport/ad9154.rs b/artiq/runtime.rs/libksupport/ad9154.rs
new file mode 100644
index 000000000..ab7026258
--- /dev/null
+++ b/artiq/runtime.rs/libksupport/ad9154.rs
@@ -0,0 +1,75 @@
+use board::csr;
+
+pub extern fn init() {
+    unsafe {
+        csr::ad9154::spi_offline_write(1);
+        csr::ad9154::spi_cs_polarity_write(0);
+        csr::ad9154::spi_clk_polarity_write(0);
+        csr::ad9154::spi_clk_phase_write(0);
+        csr::ad9154::spi_lsb_first_write(0);
+        csr::ad9154::spi_half_duplex_write(0);
+        csr::ad9154::spi_clk_div_write_write(16);
+        csr::ad9154::spi_clk_div_read_write(16);
+        csr::ad9154::spi_xfer_len_write_write(24);
+        csr::ad9154::spi_xfer_len_read_write(0);
+        csr::ad9154::spi_cs_write(csr::CONFIG_AD9154_DAC_CS);
+        csr::ad9154::spi_offline_write(0);
+    }
+}
+
+const AD9_READ: u16 = 1 << 15;
+
+pub extern fn dac_write(addr: u16, data: u8) {
+    unsafe {
+        csr::ad9154::spi_data_write_write(
+            ((addr as u32) << 16) | ((data as u32) << 8));
+        while csr::ad9154::spi_pending_read() != 0 {}
+        while csr::ad9154::spi_active_read() != 0 {}
+    }
+}
+
+pub extern fn dac_read(addr: u16) -> u8 {
+    unsafe {
+        dac_write(AD9_READ | addr, 0);
+        csr::ad9154::spi_data_read_read() as u8
+    }
+}
+
+pub extern fn clk_write(addr: u16, data: u8) {
+    unsafe {
+        csr::ad9154::spi_cs_write(csr::CONFIG_AD9154_CLK_CS);
+        dac_write(addr, data);
+        csr::ad9154::spi_cs_write(csr::CONFIG_AD9154_DAC_CS);
+    }
+}
+
+pub extern fn clk_read(addr: u16) -> u8 {
+    unsafe {
+        clk_write(AD9_READ | addr, 0);
+        csr::ad9154::spi_data_read_read() as u8
+    }
+}
+
+pub extern fn jesd_enable(en: u32) {
+    unsafe {
+        csr::ad9154::jesd_control_enable_write(en);
+    }
+}
+
+pub extern fn jesd_ready() {
+    unsafe {
+        csr::ad9154::jesd_control_ready_read();
+    }
+}
+
+pub extern fn jesd_prbs(p: u32) {
+    unsafe {
+        csr::ad9154::jesd_control_prbs_config_write(p);
+    }
+}
+
+pub extern fn jesd_stpl(en: u32) {
+    unsafe {
+        csr::ad9154::jesd_control_stpl_enable_write(en);
+    }
+}
diff --git a/artiq/runtime.rs/libksupport/api.rs b/artiq/runtime.rs/libksupport/api.rs
index f7dbf41c0..d27e8964f 100644
--- a/artiq/runtime.rs/libksupport/api.rs
+++ b/artiq/runtime.rs/libksupport/api.rs
@@ -117,17 +117,22 @@ static mut API: &'static [(&'static str, *const ())] = &[
     #[cfg(has_i2c)]
     api!(i2c_read = ::i2c::read),
 
-// #if (defined CONFIG_AD9154_CS)
-    api!(ad9154_init),
-    api!(ad9154_write),
-    api!(ad9154_read),
-
-    api!(ad9516_write),
-    api!(ad9516_read),
-
-    api!(ad9154_jesd_enable),
-    api!(ad9154_jesd_ready),
-    api!(ad9154_jesd_prbs),
-    api!(ad9154_jesd_stpl),
-// #endif
+    #[cfg(has_ad9154)]
+    api!(ad9154_init = ::ad9154::init),
+    #[cfg(has_ad9154)]
+    api!(ad9154_write = ::ad9154::dac_write),
+    #[cfg(has_ad9154)]
+    api!(ad9154_read = ::ad9154::dac_read),
+    #[cfg(has_ad9154)]
+    api!(ad9516_write = ::ad9154::clk_write),
+    #[cfg(has_ad9154)]
+    api!(ad9516_read = ::ad9154::clk_read),
+    #[cfg(has_ad9154)]
+    api!(ad9154_jesd_enable = ::ad9154::jesd_enable),
+    #[cfg(has_ad9154)]
+    api!(ad9154_jesd_ready = ::ad9154::jesd_ready),
+    #[cfg(has_ad9154)]
+    api!(ad9154_jesd_prbs = ::ad9154::jesd_prbs),
+    #[cfg(has_ad9154)]
+    api!(ad9154_jesd_stpl = ::ad9154::jesd_stpl),
 ];
diff --git a/artiq/runtime.rs/libksupport/lib.rs b/artiq/runtime.rs/libksupport/lib.rs
index 08673e759..66aecbe98 100644
--- a/artiq/runtime.rs/libksupport/lib.rs
+++ b/artiq/runtime.rs/libksupport/lib.rs
@@ -52,6 +52,8 @@ macro_rules! artiq_raise {
 mod rtio;
 #[cfg(has_i2c)]
 mod i2c;
+#[cfg(has_ad9154)]
+mod ad9154;
 
 use core::{mem, ptr, slice, str};
 use std::io::Cursor;
diff --git a/artiq/runtime/Makefile b/artiq/runtime/Makefile
index 853154c8a..a8387466b 100644
--- a/artiq/runtime/Makefile
+++ b/artiq/runtime/Makefile
@@ -4,7 +4,7 @@ include $(MISOC_DIRECTORY)/software/common.mak
 PYTHON ?= python3.5
 
 OBJECTS := flash_storage.o main.o
-OBJECTS_KSUPPORT := ksupport_glue.o artiq_personality.o ad9154.o
+OBJECTS_KSUPPORT := ksupport_glue.o artiq_personality.o
 
 RUSTOUT_DIRECTORY := cargo/or1k-unknown-none/debug
 CORE_IO_COMMIT := d40c593f42fafbac1ff3d827f6df96338b5b7d8b
diff --git a/artiq/runtime/ad9154.c b/artiq/runtime/ad9154.c
deleted file mode 100644
index 5bc5e49e2..000000000
--- a/artiq/runtime/ad9154.c
+++ /dev/null
@@ -1,77 +0,0 @@
-#include <generated/csr.h>
-
-#include <stdint.h>
-#include <stddef.h>
-
-#include "artiq_personality.h"
-#include "ad9154.h"
-
-#ifdef CONFIG_AD9154_DAC_CS
-
-void ad9154_init(void)
-{
-    ad9154_spi_offline_write(1);
-    ad9154_spi_cs_polarity_write(0);
-    ad9154_spi_clk_polarity_write(0);
-    ad9154_spi_clk_phase_write(0);
-    ad9154_spi_lsb_first_write(0);
-    ad9154_spi_half_duplex_write(0);
-    ad9154_spi_clk_div_write_write(16);
-    ad9154_spi_clk_div_read_write(16);
-    ad9154_spi_xfer_len_write_write(24);
-    ad9154_spi_xfer_len_read_write(0);
-    ad9154_spi_cs_write(CONFIG_AD9154_DAC_CS);
-    ad9154_spi_offline_write(0);
-}
-
-#define AD9_READ (1 << 15)
-#define AD9_XFER(w) ((w) << 13)
-
-void ad9154_write(uint16_t addr, uint8_t data)
-{
-    ad9154_spi_data_write_write(
-            ((AD9_XFER(0) | addr) << 16) | (data << 8));
-    while (ad9154_spi_pending_read());
-    while (ad9154_spi_active_read());
-}
-
-uint8_t ad9154_read(uint16_t addr)
-{
-    ad9154_write(AD9_READ | addr, 0);
-    return ad9154_spi_data_read_read();
-}
-
-void ad9516_write(uint16_t addr, uint8_t data)
-{
-    ad9154_spi_cs_write(CONFIG_AD9154_CLK_CS);
-    ad9154_write(addr, data);
-    ad9154_spi_cs_write(CONFIG_AD9154_DAC_CS);
-}
-
-uint8_t ad9516_read(uint16_t addr)
-{
-    ad9516_write(AD9_READ | addr, 0);
-    return ad9154_spi_data_read_read();
-}
-
-void ad9154_jesd_enable(int en)
-{
-    ad9154_jesd_control_enable_write(en);
-}
-
-int ad9154_jesd_ready(void)
-{
-    return ad9154_jesd_control_ready_read();
-}
-
-void ad9154_jesd_prbs(int p)
-{
-    ad9154_jesd_control_prbs_config_write(p);
-}
-
-void ad9154_jesd_stpl(int en)
-{
-    ad9154_jesd_control_stpl_enable_write(en);
-}
-
-#endif /* CONFIG_AD9154_DAC_CS */
diff --git a/artiq/runtime/ad9154.h b/artiq/runtime/ad9154.h
deleted file mode 100644
index d6fa93d85..000000000
--- a/artiq/runtime/ad9154.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#ifndef __AD9154_H
-#define __AD9154_H
-
-#ifdef CONFIG_AD9154_DAC_CS
-
-void ad9154_init(void);
-void ad9154_write(uint16_t addr, uint8_t data);
-uint8_t ad9154_read(uint16_t addr);
-
-void ad9516_write(uint16_t addr, uint8_t data);
-uint8_t ad9516_read(uint16_t addr);
-
-void ad9154_jesd_enable(int en);
-int ad9154_jesd_ready(void);
-void ad9154_jesd_prbs(int p);
-void ad9154_jesd_stpl(int en);
-
-#endif
-#endif