fix: move exported stall commands to USBDevice

Author: mikesmitty

src/machine/machine_rp2_usb.go

@@ -150,8 +150,8 @@ func sendViaEPIn(ep uint32, data []byte, count int) {
 	_usbDPSRAM.EPxBufferControl[ep&0x7F].In.Set(val)
 }
 
-// Enable ENDPOINT_HALT/stall on a USB IN endpoint
-func SetStallEPIn(ep uint32) {
+// Set ENDPOINT_HALT/stall status on a USB IN endpoint
+func (dev *USBDevice) SetStallEPIn(ep uint32) {
 	// Prepare buffer control register value
 	if ep == 0 {
 		armEPZeroStall()
@@ -162,8 +162,8 @@ func SetStallEPIn(ep uint32) {
 	_usbDPSRAM.EPxBufferControl[ep&0x7F].In.Set(val)
 }
 
-// Enable ENDPOINT_HALT/stall on a USB OUT endpoint
-func SetStallEPOut(ep uint32) {
+// Set ENDPOINT_HALT/stall status on a USB OUT endpoint
+func (dev *USBDevice) SetStallEPOut(ep uint32) {
 	if ep == 0 {
 		panic("SetStallEPOut: EP0 OUT not valid")
 	}
@@ -172,7 +172,7 @@ func SetStallEPOut(ep uint32) {
 }
 
 // Clear the ENDPOINT_HALT/stall on a USB IN endpoint
-func ClearStallEPIn(ep uint32) {
+func (dev *USBDevice) ClearStallEPIn(ep uint32) {
 	ep = ep & 0x7F
 	val := uint32(usbBuf0CtrlStall)
 	_usbDPSRAM.EPxBufferControl[ep].In.ClearBits(val)
@@ -183,7 +183,7 @@ func ClearStallEPIn(ep uint32) {
 }
 
 // Clear the ENDPOINT_HALT/stall on a USB OUT endpoint
-func ClearStallEPOut(ep uint32) {
+func (dev *USBDevice) ClearStallEPOut(ep uint32) {
 	ep = ep & 0x7F
 	val := uint32(usbBuf0CtrlStall)
 	_usbDPSRAM.EPxBufferControl[ep].Out.ClearBits(val)