milk-v/meles: WIP USB gadget

Signed-off-by: Daniel Maslowski <info@orangecms.org> Signed-off-by: Kanak Shilledar <kanakshilledar111@protonmail.com>
oreboot · kanakshilledar · Aug 17, 2024 · Aug 17, 2024 · Aug 22, 2024 · Aug 26, 2024
commit 6761dba1529215258ceb18b10e68728ec8a2724a
diff --git a/src/mainboard/milk-v/meles/bt0/src/dwc3.rs b/src/mainboard/milk-v/meles/bt0/src/dwc3.rs
@@ -0,0 +1,9 @@
+use crate::util::{read32, write32};
+
+const DWC3_DCTL: usize = 0xc704;
+const DWC3_DCTL_RUN_STOP: u32 = 1 << 31;
+
+pub fn dwc3_gadget_run(base: usize) {
+    println!("USB gadget run");
+    write32(base + DWC3_DCTL, DWC3_DCTL_RUN_STOP);
+}
diff --git a/src/mainboard/milk-v/meles/bt0/src/main.rs b/src/mainboard/milk-v/meles/bt0/src/main.rs
@@ -5,6 +5,7 @@
 // TODO: remove when done debugging crap
 #![allow(unused)]
 
+use dwc3::dwc3_gadget_run;
 use embedded_hal_nb::serial::Write;
 
 #[macro_use]
@@ -20,6 +21,7 @@ use core::{
 use riscv::register::{marchid, mhartid, mimpid, mip, mvendorid};
 
 mod dram;
+mod dwc3;
 mod uart;
 mod util;
 
@@ -236,6 +238,9 @@ fn main() {
 
     print_ids();
 
+    // Can we get this to work? :-)
+    dwc3_gadget_run(USB0_BASE);
+
     // util::dump_block(BROM_BASE, 0x1000, 32); // only gets 0000000...
     // util::dump_block(QSPI0_BASE, 0x100, 32); // hangs after 96 bytes