From 3ea5d775acdbd62e1194c002c72b83b26052e1a3 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Sun, 18 Feb 2018 14:45:22 +0100
Subject: Added control requests to support autoupgrade.

---
 hidflash.py |  3 +++
 main.cpp    | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+)

diff --git a/hidflash.py b/hidflash.py
index a9df48c..a5b4197 100755
--- a/hidflash.py
+++ b/hidflash.py
@@ -13,6 +13,9 @@ for segment in sorted(e.iter_segments(), key = lambda x: x.header.p_paddr):
 	if segment.header.p_type != 'PT_LOAD':
 		continue
 	
+	if segment.header.p_paddr >= 0x20000000:
+		continue
+	
 	data = segment.data()
 	lma = segment.header.p_paddr
 	
diff --git a/main.cpp b/main.cpp
index 8e267bf..9aae4ee 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,6 +1,7 @@
 #include <rcc/flash.h>
 #include <rcc/rcc.h>
 #include <rcc/crs.h>
+#include <interrupt/interrupt.h>
 #include <syscfg/syscfg.h>
 #include <gpio/gpio.h>
 #include <os/time.h>
@@ -8,6 +9,17 @@
 #include <usb/usb.h>
 #include <usb/descriptor.h>
 
+const uint8_t fw_version = 1;
+
+uint32_t reset_reason __attribute__((section(".bootinfo")));
+
+static bool do_reset;
+
+void reset_bootloader() {
+	reset_reason = 0xb007;
+	SCB.AIRCR = (0x5fa << 16) | (1 << 2); // SYSRESETREQ
+}
+
 enum tag_type_t {
 	ISO15693,
 	ISO18092,
@@ -129,6 +141,52 @@ class USB_keypad : public USB_class_driver {
 
 USB_keypad usb_keypad(usb);
 
+class USB_fwver : public USB_class_driver {
+	private:
+		USB_generic& usb;
+		
+		bool reset_boot(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+			if(wValue != 0xb007) {
+				return false;
+			}
+			
+			do_reset = true;
+			
+			usb.write(0, nullptr, 0);
+			return true;
+		}
+		
+		bool get_version(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+			if(wLength < 1) {
+				return false;
+			}
+			
+			uint32_t buf = fw_version;
+			usb.write(0, &buf, 1);
+			return true;
+		}
+		
+	public:
+		USB_fwver(USB_generic& usbd) : usb(usbd) {
+			usb.register_driver(this);
+		}
+		
+	protected:
+		virtual SetupStatus handle_setup(uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+			if(bmRequestType == 0xc0 && bRequest == 0xf0) {
+				return get_version(wValue, wIndex, wLength) ? SetupStatus::Ok : SetupStatus::Stall;
+			}
+			
+			if(bmRequestType == 0x40 && bRequest == 0xff) {
+				return reset_boot(wValue, wIndex, wLength) ? SetupStatus::Ok : SetupStatus::Stall;
+			}
+			
+			return SetupStatus::Unhandled;
+		}
+};
+
+USB_fwver usb_fwver(usb);
+
 int main() {
 	rcc_init();
 	
@@ -269,6 +327,10 @@ int main() {
 			kp_last = kp_state;
 		}
 		
+		if(do_reset) {
+			Time::sleep(10);
+			reset_bootloader();
+		}
 		
 		usb.process();
 	}
-- 
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