From 1856d859f92dda40c41f85bbf4821cad6f32184b Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Wed, 29 Aug 2012 23:46:06 +0200
Subject: Attached i2c_read and jtag_shift to USB stack.

---
 laks     |   2 +-
 main.cpp | 109 +++++++++++++++++++++++++++++++++++++++++++--------------------
 2 files changed, 75 insertions(+), 36 deletions(-)

diff --git a/laks b/laks
index 0661001..8d68e3d 160000
--- a/laks
+++ b/laks
@@ -1 +1 @@
-Subproject commit 066100177770944a376e3a01cf4685ff9d2f562f
+Subproject commit 8d68e3d9823abe8a9ff6f8b0f6f4addee98bb260
diff --git a/main.cpp b/main.cpp
index c35ad7e..9aafa08 100644
--- a/main.cpp
+++ b/main.cpp
@@ -45,45 +45,81 @@ desc_t conf_desc_p = {sizeof(conf_desc), (void*)&conf_desc};
 
 USB_otg usb(OTG_HS, dev_desc_p, conf_desc_p);
 
-bool i2c_read(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
-	uint8_t buf[wLength];
-	I2C2.read_reg(wValue, wIndex, wLength, buf);
+class USB_I2C : public USB_class_driver {
+	private:
+		I2C_t& i2c;
+		
+		bool i2c_read(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+			uint8_t buf[wLength];
+			i2c.read_reg(wValue, wIndex, wLength, buf);
+			
+			usb.write(0, (uint32_t*)buf, wLength);
+			return true;
+		}
 	
-	usb.write(0, (uint32_t*)buf, wLength);
-	return true;
-}
-
-bool jtag_tick(bool tdi, bool tms) {
-	bool tdo = jtag_tdo.get();
-	jtag_tdi.set(tdi);
-	jtag_tms.set(tms);
-	jtag_tck.on();
-	for(uint32_t i = 0; i < 1000; i++) {
-		asm volatile("nop");
-	}
-	jtag_tck.off();
-	for(uint32_t i = 0; i < 1000; i++) {
-		asm volatile("nop");
-	}
-	return tdo;
-}
-
-bool jtag_shift(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
-	if(wLength > 16) {
-		return false;
-	}
+	public:
+		USB_I2C(I2C_t& i2c_bus) : i2c(i2c_bus) {}
 	
-	uint32_t tdo = 0;
+	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 i2c_read(wValue, wIndex, wLength) ? SetupStatus::Ok : SetupStatus::Stall;
+			}
+			
+			return SetupStatus::Unhandled;
+		}
+};
+
+USB_I2C usb_i2c(I2C2);
+
+class USB_JTAG : public USB_class_driver {
+	private:
+		bool jtag_tick(bool tdi, bool tms) {
+			bool tdo = jtag_tdo.get();
+			jtag_tdi.set(tdi);
+			jtag_tms.set(tms);
+			jtag_tck.on();
+			for(uint32_t i = 0; i < 1000; i++) {
+				asm volatile("nop");
+			}
+			jtag_tck.off();
+			for(uint32_t i = 0; i < 1000; i++) {
+				asm volatile("nop");
+			}
+			return tdo;
+		}
+		
+		bool jtag_shift(uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+			if(wLength > 16) {
+				return false;
+			}
+			
+			uint32_t tdo = 0;
+			
+			for(int16_t i = 0; i < wLength; i++) {
+				tdo |= jtag_tick(wValue & 1, wIndex & 1) ? 1 << i : 0;
+				wValue >>= 1;
+				wIndex >>= 1;
+			}
+			
+			usb.write(0, &tdo, (wLength + 7) >> 3);
+			return true;
+		}
 	
-	for(int16_t i = 0; i < wLength; i++) {
-		tdo |= jtag_tick(wValue & 1, wIndex & 1) ? 1 << i : 0;
-		wValue >>= 1;
-		wIndex >>= 1;
-	}
+	public:
+		USB_JTAG() {}
 	
-	usb.write(0, &tdo, (wLength + 7) >> 3);
-	return true;
-}
+	protected:
+		virtual SetupStatus handle_setup(uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+			if(bmRequestType == 0xc0 && bRequest == 0xff) {
+				return jtag_shift(wValue, wIndex, wLength) ? SetupStatus::Ok : SetupStatus::Stall;
+			}
+			
+			return SetupStatus::Unhandled;
+		}
+};
+
+USB_JTAG usb_jtag;
 
 template<>
 void interrupt<(Interrupt::IRQ)77>() {
@@ -145,6 +181,9 @@ int main() {
 	
 	usb_thread.start();
 	
+	usb.register_control_handler(&usb_i2c);
+	usb.register_control_handler(&usb_jtag);
+	
 	RCC.enable(RCC.SPI1);
 	
 	PA5.set_mode(Pin::AF);
-- 
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