libboard_zynq: fix some hw setup

libboard_zynq/src/ddr/mod.rs

@@ -1,6 +1,6 @@
 use libregister::{RegisterR, RegisterW, RegisterRW};
 use crate::{print, println};
-use super::slcr;
+use super::slcr::{self, DdriobVrefSel};
 use super::clocks::{Clocks, source::{DdrPll, ClockSource}};
 
 mod regs;
@@ -174,21 +174,25 @@ impl DdrRam {
             );
             #[cfg(feature = "target_zc706")]
             slcr.ddriob_ddr_ctrl.modify(|_, w| w
-                    .vref_ext_en_lower(true)
+                    .vref_int_en(true)
-                    .vref_ext_en_upper(true)
+                    .vref_sel(DdriobVrefSel::Vref0_75V)
+                    .vref_ext_en_lower(false)
+                    .vref_ext_en_upper(false)
             );
         });
     }
 
     /// Reset DDR controller
     fn reset_ddrc(&mut self) {
-        self.regs.ddrc_ctrl.modify(|_, w| w
-            .soft_rstb(false)
-        );
         #[cfg(feature = "target_zc706")]
         let width = regs::DataBusWidth::Width32bit;
         #[cfg(feature = "target_cora_z7_10")]
         let width = regs::DataBusWidth::Width16bit;
+        self.regs.ddrc_ctrl.modify(|_, w| w
+            .soft_rstb(false)
+            .powerdown_en(false)
+            .data_bus_width(width)
+        );
         self.regs.ddrc_ctrl.modify(|_, w| w
             .soft_rstb(true)
             .powerdown_en(false)

libboard_zynq/src/ddr/regs.rs

@@ -3,6 +3,7 @@ use volatile_register::{RO, RW};
 use libregister::{register, register_bit, register_bits_typed};
 
 #[allow(unused)]
+#[derive(Clone, Copy)]
 #[repr(u8)]
 pub enum DataBusWidth {
     Width32bit = 0b00,

libboard_zynq/src/flash/mod.rs

@@ -184,7 +184,6 @@ impl Flash<()> {
                 slcr::MioPin00::zeroed()
                     .l0_sel(true)
                     .io_type(slcr::IoBufferType::Lvcmos18)
-                    .pullup(true)
             );
 
             // Option: Add Second Serial Clock
@@ -193,6 +192,7 @@ impl Flash<()> {
                 slcr::MioPin09::zeroed()
                     .l0_sel(true)
                     .io_type(slcr::IoBufferType::Lvcmos18)
+                    .pullup(true)
             );
 
             // Option: Add 4-bit Data
@@ -201,21 +201,25 @@ impl Flash<()> {
                 slcr::MioPin10::zeroed()
                     .l0_sel(true)
                     .io_type(slcr::IoBufferType::Lvcmos18)
+                    .pullup(true)
             );
             slcr.mio_pin_11.write(
                 slcr::MioPin11::zeroed()
                     .l0_sel(true)
                     .io_type(slcr::IoBufferType::Lvcmos18)
+                    .pullup(true)
             );
             slcr.mio_pin_12.write(
                 slcr::MioPin12::zeroed()
                     .l0_sel(true)
                     .io_type(slcr::IoBufferType::Lvcmos18)
+                    .pullup(true)
             );
             slcr.mio_pin_13.write(
                 slcr::MioPin13::zeroed()
                     .l0_sel(true)
                     .io_type(slcr::IoBufferType::Lvcmos18)
+                    .pullup(true)
             );
 
             // Option: Add Feedback Output Clock
@@ -224,6 +228,7 @@ impl Flash<()> {
                 slcr::MioPin08::zeroed()
                     .l0_sel(true)
                     .io_type(slcr::IoBufferType::Lvcmos18)
+                    .pullup(true)
             );
         });
     }

libboard_zynq/src/slcr.rs

@@ -626,7 +626,7 @@ register_bit!(ddriob_ddr_ctrl, refio_en, 9);
 
 register!(ddriob_dci_ctrl, DdriobDciCtrl, RW, u32);
 register_bit!(ddriob_dci_ctrl, reset, 0);
-register_bit!(ddriob_dci_ctrl, enable, 0);
+register_bit!(ddriob_dci_ctrl, enable, 1);
 register_bits!(ddriob_dci_ctrl, nref_opt1, u8, 6, 7);
 register_bits!(ddriob_dci_ctrl, nref_opt2, u8, 8, 10);
 register_bits!(ddriob_dci_ctrl, nref_opt4, u8, 11, 13);