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fix: don't hardcode success return state

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fix: validate bmRequestType\nfix: mimic tinyusb behavior in mscStateNeedReset\nfix: CLEAR_FEATURE requests to iface addr are against spec
This commit is contained in:
Michael Smith
2025-12-04 18:05:37 -05:00
committed by Ron Evans
parent 3afd2c3597
commit 39e0333663
1 changed files with 15 additions and 9 deletions
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src/machine/usb/msc/setup.go
+15 -9
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@@ -3,7 +3,6 @@ package msc
import (
"machine"
"machine/usb"
"machine/usb/msc/csw"
)
func setupPacketHandler(setup usb.Setup) bool {
@@ -18,11 +17,17 @@ func (m *msc) setupPacketHandler(setup usb.Setup) bool {
wValue := (uint16(setup.WValueH) << 8) | uint16(setup.WValueL)
switch setup.BRequest {
case usb.CLEAR_FEATURE:
ok = m.handleClearFeature(setup, wValue)
if setup.BmRequestType == 0x02 { // Host-to-Device | Standard | Endpoint
ok = m.handleClearFeature(setup, wValue)
}
case usb.GET_MAX_LUN:
ok = m.handleGetMaxLun(setup, wValue)
if setup.BmRequestType == 0xA1 { // Device-to-Host | Class | Interface
ok = m.handleGetMaxLun(setup, wValue)
}
case usb.MSC_RESET:
ok = m.handleReset(setup, wValue)
if setup.BmRequestType == 0x21 { // Host-to-Device | Class | Interface
ok = m.handleReset(setup, wValue)
}
}
return ok
}
@@ -53,24 +58,25 @@ func (m *msc) handleClearFeature(setup usb.Setup, wValue uint16) bool {
} else if wIndex == usb.MSC_ENDPOINT_OUT {
m.stallEndpoint(usb.MSC_ENDPOINT_OUT)
}
return ok
machine.SendZlp()
return true
}
// Clear the direction bit from the endpoint address for comparison
wIndex := setup.WIndex & 0x7F
// Clear the IN/OUT stalls if addressed to the endpoint, or both if addressed to the interface
if wIndex == usb.MSC_ENDPOINT_IN || wIndex == mscInterface {
// Clear the IN/OUT stalls if addressed to the endpoint
if wIndex == usb.MSC_ENDPOINT_IN {
m.clearStallEndpoint(usb.MSC_ENDPOINT_IN)
ok = true
}
if wIndex == usb.MSC_ENDPOINT_OUT || wIndex == mscInterface {
if wIndex == usb.MSC_ENDPOINT_OUT {
m.clearStallEndpoint(usb.MSC_ENDPOINT_OUT)
ok = true
}
// Send a CSW if needed to resume after the IN endpoint stall is cleared
if m.state == mscStateStatus && wIndex == usb.MSC_ENDPOINT_IN {
m.sendCSW(csw.StatusPassed)
m.sendCSW(m.respStatus)
ok = true
}