From c5137eeb623f5c2fa7c1a4e9dc15f2b62e74c6e4 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Fri, 20 Dec 2019 15:25:12 +0800
Subject: [PATCH] firmware: remove legacy hmc542 code

---
 artiq/firmware/libboard_artiq/hmc542.rs | 60 -------------------------
 artiq/firmware/libboard_artiq/lib.rs    |  2 -
 artiq/firmware/runtime/main.rs          |  2 -
 artiq/firmware/satman/main.rs           |  2 -
 4 files changed, 66 deletions(-)
 delete mode 100644 artiq/firmware/libboard_artiq/hmc542.rs

diff --git a/artiq/firmware/libboard_artiq/hmc542.rs b/artiq/firmware/libboard_artiq/hmc542.rs
deleted file mode 100644
index fed25a78e..000000000
--- a/artiq/firmware/libboard_artiq/hmc542.rs
+++ /dev/null
@@ -1,60 +0,0 @@
-use board_misoc::{csr, clock};
-
-const PIN_LE:    u32 = 1 << 0;
-const PIN_SIN:   u32 = 1 << 1;
-const PIN_CLK:   u32 = 1 << 2;
-const PIN_RST_N: u32 = 1 << 3;
-const PIN_RST:   u32 = PIN_RST_N;
-
-const CARDS:    usize = 4;
-const CHANNELS: usize = 2;
-
-fn set_pins(card_index: usize, chan_index: usize, pins: u32) {
-    let pins = pins ^ PIN_RST_N;
-    let shift = (card_index * 2 + chan_index)*4;
-    unsafe {
-        let state = csr::allaki_atts::out_read();
-        let state = state & !(0xf << shift);
-        let state = state | (pins << shift);
-        csr::allaki_atts::out_write(state);
-    }
-    clock::spin_us(100);
-}
-
-/// Attenuation is in units of 0.5 dB, from 0 dB (0) to 31.5 dB (63).
-pub fn program(card_index: usize, chan_index: usize, atten: u8) {
-    assert!(card_index < 4 && chan_index < 2);
-
-    info!("card {} channel {} set to {}{} dB",
-          card_index, chan_index,
-          atten / 2, if atten % 2 != 0 { ".5" } else { "" });
-
-    // 0b111111 = 0dB
-    // 0b111110 = 0.5dB
-    // 0b111101 = 1dB
-    // 0b111100 = 1.5dB
-    // ...
-    // 0b011111 = 16dB
-    // ...
-    // 0b000000 = 31.5dB
-    let atten = !atten << 2;
-
-    let set_pins = |pins| set_pins(card_index, chan_index, pins);
-    set_pins(PIN_RST);
-    set_pins(0);
-    for n in (0..8).rev() {
-        let sin = if atten & 1 << n != 0 { PIN_SIN } else { 0 };
-        set_pins(sin);
-        set_pins(sin | PIN_CLK);
-    }
-    set_pins(PIN_LE);
-}
-
-/// See `program`.
-pub fn program_all(atten: u8) {
-    for card in 0..CARDS {
-        for chan in 0..CHANNELS {
-            program(card, chan, atten)
-        }
-    }
-}
diff --git a/artiq/firmware/libboard_artiq/lib.rs b/artiq/firmware/libboard_artiq/lib.rs
index 0826ceac3..448b10f9e 100644
--- a/artiq/firmware/libboard_artiq/lib.rs
+++ b/artiq/firmware/libboard_artiq/lib.rs
@@ -35,8 +35,6 @@ pub mod hmc830_7043;
 mod ad9154_reg;
 #[cfg(has_ad9154)]
 pub mod ad9154;
-#[cfg(has_allaki_atts)]
-pub mod hmc542;
 
 #[cfg(has_grabber)]
 pub mod grabber;
diff --git a/artiq/firmware/runtime/main.rs b/artiq/firmware/runtime/main.rs
index d79c7b254..9cc34edc6 100644
--- a/artiq/firmware/runtime/main.rs
+++ b/artiq/firmware/runtime/main.rs
@@ -103,8 +103,6 @@ fn sayma_hw_init() {
             error!("failed to align SYSREF at DAC: {}", e);
         }
     }
-    #[cfg(has_allaki_atts)]
-    board_artiq::hmc542::program_all(8/*=4dB*/);
 }
 
 fn startup() {
diff --git a/artiq/firmware/satman/main.rs b/artiq/firmware/satman/main.rs
index fb738f057..5225eba1b 100644
--- a/artiq/firmware/satman/main.rs
+++ b/artiq/firmware/satman/main.rs
@@ -474,8 +474,6 @@ pub extern fn main() -> i32 {
             board_artiq::ad9154::reset_and_detect(dacno as u8).expect("AD9154 DAC not detected");
         }
     }
-    #[cfg(has_allaki_atts)]
-    board_artiq::hmc542::program_all(8/*=4dB*/);
 
     #[cfg(has_drtio_routing)]
     let mut repeaters = [repeater::Repeater::default(); csr::DRTIOREP.len()];