From: henryk@ploetzli.ch <henryk@ploetzli.ch@ef4ab9da-24cd-11de-8aaa-f3a34680c41f>
Date: Fri, 28 Aug 2009 00:44:09 +0000 (+0000)
Subject: Send Stall in response to USB SET FEATURE or CLEAR FEATURE requests. Speeds up device... 
X-Git-Tag: v1.0.0~510
X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/8e19377db1fccbb662fb6d579e5d6ad75c2c229e?ds=sidebyside

Send Stall in response to USB SET FEATURE or CLEAR FEATURE requests. Speeds up device enumeration on linux by 10s.
---

diff --git a/common/usb.c b/common/usb.c
index 50a9fc69..bef4d7e0 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -259,6 +259,19 @@ static void UsbSendZeroLength(void)
 		;
 }
 
+static void UsbSendStall(void)
+{
+	UDP_ENDPOINT_CSR(0) |= UDP_CSR_FORCE_STALL;
+
+	while(!(UDP_ENDPOINT_CSR(0) & UDP_CSR_STALL_SENT))
+		;
+
+	UDP_ENDPOINT_CSR(0) &= ~UDP_CSR_STALL_SENT;
+
+	while(UDP_ENDPOINT_CSR(0) & UDP_CSR_STALL_SENT)
+		;
+}
+
 static void HandleRxdSetupData(void)
 {
 	int i;
@@ -346,6 +359,8 @@ static void HandleRxdSetupData(void)
 
 		case USB_REQUEST_CLEAR_FEATURE:
 		case USB_REQUEST_SET_FEATURE:
+			UsbSendStall();
+			break;
 		case USB_REQUEST_SET_DESCRIPTOR:
 		case USB_REQUEST_SYNC_FRAME:
 		default: