From 58af6b59db2590c00ccf896294345ba553d01aac Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@windfis.ch>
Date: Sun, 21 Mar 2021 23:00:15 +0100
Subject: [PATCH] Add control-buffer-512 and -1024 feature flags

---
 Cargo.toml          |  2 ++
 src/control_pipe.rs | 19 ++++++++++++++++---
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index d582a0f..79f4233 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,6 +16,8 @@ rand = "0.6.1"
 [features]
 # Use a 256 byte buffer for control transfers instead of 128.
 control-buffer-256 = []
+control-buffer-512 = []
+control-buffer-1024 = []
 
 # Use larger endpoint buffers for highspeed operation (default fullspeed)
 #
diff --git a/src/control_pipe.rs b/src/control_pipe.rs
index a38a0df..9f8d82b 100644
--- a/src/control_pipe.rs
+++ b/src/control_pipe.rs
@@ -21,10 +21,23 @@ enum ControlState {
 
 // Maximum length of control transfer data stage in bytes. 128 bytes by default. You can define the
 // feature "control-buffer-256" to make it 256 bytes if you have larger control transfers.
-#[cfg(not(feature = "control-buffer-256"))]
-const CONTROL_BUF_LEN: usize = 128;
-#[cfg(feature = "control-buffer-256")]
+
+#[cfg(feature = "control-buffer-1024")]
+const CONTROL_BUF_LEN: usize = 1024;
+#[cfg(all(not(feature = "control-buffer-1024"), feature = "control-buffer-512"))]
+const CONTROL_BUF_LEN: usize = 512;
+#[cfg(all(
+    not(feature = "control-buffer-1024"),
+    not(feature = "control-buffer-512"),
+    feature = "control-buffer-256"
+))]
 const CONTROL_BUF_LEN: usize = 256;
+#[cfg(all(
+    not(feature = "control-buffer-1024"),
+    not(feature = "control-buffer-512"),
+    not(feature = "control-buffer-256")
+))]
+const CONTROL_BUF_LEN: usize = 128;
 
 /// Buffers and parses USB control transfers.
 pub struct ControlPipe<'a, B: UsbBus> {