From 94b38449bd1e6d04a009700689d34ce1adf72c07 Mon Sep 17 00:00:00 2001
From: Rob Pilling <robpilling@gmail.com>
Date: Mon, 22 Apr 2024 22:16:25 +0100
Subject: [PATCH 1/2] rp usb: add stall implementation

---
 embassy-rp/src/usb.rs | 34 ++++++++++++++++++++++++++++++----
 1 file changed, 30 insertions(+), 4 deletions(-)

diff --git a/embassy-rp/src/usb.rs b/embassy-rp/src/usb.rs
index 37d37d6d9..99cba2d82 100644
--- a/embassy-rp/src/usb.rs
+++ b/embassy-rp/src/usb.rs
@@ -412,12 +412,38 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
         .await
     }
 
-    fn endpoint_set_stalled(&mut self, _ep_addr: EndpointAddress, _stalled: bool) {
-        todo!();
+    fn endpoint_set_stalled(&mut self, ep_addr: EndpointAddress, stalled: bool) {
+        let n = ep_addr.index();
+
+        if n == 0 {
+            T::regs().ep_stall_arm().modify(|w| {
+                if ep_addr.is_in() {
+                    w.set_ep0_in(stalled);
+                } else {
+                    w.set_ep0_out(stalled);
+                }
+            });
+        }
+
+        let ctrl = if ep_addr.is_in() {
+            T::dpram().ep_in_buffer_control(n)
+        } else {
+            T::dpram().ep_out_buffer_control(n)
+        };
+
+        ctrl.modify(|w| w.set_stall(stalled));
     }
 
-    fn endpoint_is_stalled(&mut self, _ep_addr: EndpointAddress) -> bool {
-        todo!();
+    fn endpoint_is_stalled(&mut self, ep_addr: EndpointAddress) -> bool {
+        let n = ep_addr.index();
+
+        let ctrl = if ep_addr.is_in() {
+            T::dpram().ep_in_buffer_control(n)
+        } else {
+            T::dpram().ep_out_buffer_control(n)
+        };
+
+        ctrl.read().stall()
     }
 
     fn endpoint_set_enabled(&mut self, ep_addr: EndpointAddress, enabled: bool) {

From 84cd0c672b2dd3754a36ae632bbe25845dbeeabc Mon Sep 17 00:00:00 2001
From: Rob Pilling <robpilling@gmail.com>
Date: Mon, 29 Apr 2024 16:23:42 +0100
Subject: [PATCH 2/2] rp usb: wake ep-wakers after stalling

---
 embassy-rp/src/usb.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/embassy-rp/src/usb.rs b/embassy-rp/src/usb.rs
index 99cba2d82..512271ae4 100644
--- a/embassy-rp/src/usb.rs
+++ b/embassy-rp/src/usb.rs
@@ -432,6 +432,9 @@ impl<'d, T: Instance> driver::Bus for Bus<'d, T> {
         };
 
         ctrl.modify(|w| w.set_stall(stalled));
+
+        let wakers = if ep_addr.is_in() { &EP_IN_WAKERS } else { &EP_OUT_WAKERS };
+        wakers[n].wake();
     }
 
     fn endpoint_is_stalled(&mut self, ep_addr: EndpointAddress) -> bool {