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machine/rp2: expose usb endpoint stall handling

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This commit is contained in:
Michael Smith
2025-04-16 21:16:51 -04:00
committed by Ron Evans
parent 0f06f59c6e
commit febb3906db
5 changed files with 74 additions and 12 deletions
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src/machine/machine_rp2_usb.go
+50 -5
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@@ -21,26 +21,33 @@ func initEndpoint(ep, config uint32) {
offset := ep*2*usbBufferLen + 0x100
val |= offset
// Bulk and interrupt endpoints must have their Packet ID reset to DATA0 when un-stalled.
epXPIDReset[ep] = false // Default to false in case an endpoint is re-initialized.
switch config {
case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointIn:
val |= usbEpControlEndpointTypeInterrupt
_usbDPSRAM.EPxControl[ep].In.Set(val)
epXPIDReset[ep] = true
case usb.ENDPOINT_TYPE_BULK | usb.EndpointOut:
val |= usbEpControlEndpointTypeBulk
_usbDPSRAM.EPxControl[ep].Out.Set(val)
_usbDPSRAM.EPxBufferControl[ep].Out.Set(usbBufferLen & usbBuf0CtrlLenMask)
_usbDPSRAM.EPxBufferControl[ep].Out.SetBits(usbBuf0CtrlAvail)
epXPIDReset[ep] = true
case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointOut:
val |= usbEpControlEndpointTypeInterrupt
_usbDPSRAM.EPxControl[ep].Out.Set(val)
_usbDPSRAM.EPxBufferControl[ep].Out.Set(usbBufferLen & usbBuf0CtrlLenMask)
_usbDPSRAM.EPxBufferControl[ep].Out.SetBits(usbBuf0CtrlAvail)
epXPIDReset[ep] = true
case usb.ENDPOINT_TYPE_BULK | usb.EndpointIn:
val |= usbEpControlEndpointTypeBulk
_usbDPSRAM.EPxControl[ep].In.Set(val)
epXPIDReset[ep] = true
case usb.ENDPOINT_TYPE_CONTROL:
val |= usbEpControlEndpointTypeControl
@@ -109,7 +116,12 @@ func handleEndpointRx(ep uint32) []byte {
}
func handleEndpointRxComplete(ep uint32) {
epXdata0[ep] = !epXdata0[ep]
setEPDataPID(ep, !epXdata0[ep])
}
// Set the USB endpoint Packet ID to DATA0 or DATA1.
func setEPDataPID(ep uint32, dataOne bool) {
epXdata0[ep] = dataOne
if epXdata0[ep] || ep == 0 {
_usbDPSRAM.EPxBufferControl[ep].Out.SetBits(usbBuf0CtrlData1Pid)
}
@@ -138,7 +150,8 @@ func sendViaEPIn(ep uint32, data []byte, count int) {
_usbDPSRAM.EPxBufferControl[ep&0x7F].In.Set(val)
}
func sendStallViaEPIn(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()
@@ -149,6 +162,37 @@ func sendStallViaEPIn(ep uint32) {
_usbDPSRAM.EPxBufferControl[ep&0x7F].In.Set(val)
}
// 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")
}
val := uint32(usbBuf0CtrlStall)
_usbDPSRAM.EPxBufferControl[ep&0x7F].Out.Set(val)
}
// Clear the ENDPOINT_HALT/stall on a USB IN endpoint.
func (dev *USBDevice) ClearStallEPIn(ep uint32) {
ep = ep & 0x7F
val := uint32(usbBuf0CtrlStall)
_usbDPSRAM.EPxBufferControl[ep].In.ClearBits(val)
if epXPIDReset[ep] {
// Reset the PID to DATA0
setEPDataPID(ep&0x7F, false)
}
}
// Clear the ENDPOINT_HALT/stall on a USB OUT endpoint.
func (dev *USBDevice) ClearStallEPOut(ep uint32) {
ep = ep & 0x7F
val := uint32(usbBuf0CtrlStall)
_usbDPSRAM.EPxBufferControl[ep].Out.ClearBits(val)
if epXPIDReset[ep] {
// Reset the PID to DATA0
setEPDataPID(ep, false)
}
}
type usbDPSRAM struct {
// Note that EPxControl[0] is not EP0Control but 8-byte setup data.
EPxControl [16]usbEndpointControlRegister
@@ -173,9 +217,10 @@ type usbBuffer struct {
}
var (
_usbDPSRAM = (*usbDPSRAM)(unsafe.Pointer(uintptr(0x50100000)))
epXdata0 [16]bool
setupBytes [8]byte
_usbDPSRAM = (*usbDPSRAM)(unsafe.Pointer(uintptr(0x50100000)))
epXdata0 [16]bool
epXPIDReset [16]bool
setupBytes [8]byte
)
func (d *usbDPSRAM) setupBytes() []byte {