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samd21,samd51,nrf52840: move usbcdc to machine/usb/cdc (#2972)

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* samd21,samd51,nrf52840: move usbcdc to machine/usb/cdc
This commit is contained in:
sago35
2022-07-10 18:33:52 +09:00
committed by GitHub
parent 56780c2691
commit d434058aef
15 changed files with 662 additions and 839 deletions
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src/machine/machine_atsamd21_usb.go
+30 -229
View File
@@ -1,141 +1,14 @@
//go:build sam && atsamd21
// +build sam,atsamd21
// Peripheral abstraction layer for the atsamd21.
//
// Datasheet:
// http://ww1.microchip.com/downloads/en/DeviceDoc/SAMD21-Family-DataSheet-DS40001882D.pdf
//
package machine
import (
"device/sam"
"runtime/interrupt"
"runtime/volatile"
"unsafe"
)
// USBCDC is the USB CDC aka serial over USB interface on the SAMD21.
type USBCDC struct {
Buffer *RingBuffer
TxIdx volatile.Register8
waitTxc bool
waitTxcRetryCount uint8
sent bool
}
var (
USB = &USBCDC{Buffer: NewRingBuffer()}
waitHidTxc bool
)
const (
usbcdcTxSizeMask uint8 = 0x3F
usbcdcTxBankMask uint8 = ^usbcdcTxSizeMask
usbcdcTxBank1st uint8 = 0x00
usbcdcTxBank2nd uint8 = usbcdcTxSizeMask + 1
usbcdcTxMaxRetriesAllowed uint8 = 5
)
// Flush flushes buffered data.
func (usbcdc *USBCDC) Flush() error {
if usbLineInfo.lineState > 0 {
idx := usbcdc.TxIdx.Get()
sz := idx & usbcdcTxSizeMask
bk := idx & usbcdcTxBankMask
if 0 < sz {
if usbcdc.waitTxc {
// waiting for the next flush(), because the transmission is not complete
usbcdc.waitTxcRetryCount++
return nil
}
usbcdc.waitTxc = true
usbcdc.waitTxcRetryCount = 0
// set the data
usbEndpointDescriptors[usb_CDC_ENDPOINT_IN].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[usb_CDC_ENDPOINT_IN][bk]))))
if bk == usbcdcTxBank1st {
usbcdc.TxIdx.Set(usbcdcTxBank2nd)
} else {
usbcdc.TxIdx.Set(usbcdcTxBank1st)
}
// clean multi packet size of bytes already sent
usbEndpointDescriptors[usb_CDC_ENDPOINT_IN].DeviceDescBank[1].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Mask << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)
// set count of bytes to be sent
usbEndpointDescriptors[usb_CDC_ENDPOINT_IN].DeviceDescBank[1].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
usbEndpointDescriptors[usb_CDC_ENDPOINT_IN].DeviceDescBank[1].PCKSIZE.SetBits((uint32(sz) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask) << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
// clear transfer complete flag
setEPINTFLAG(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_EPINTFLAG_TRCPT1)
// send data by setting bank ready
setEPSTATUSSET(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_EPSTATUSSET_BK1RDY)
usbcdc.sent = true
}
}
return nil
}
// WriteByte writes a byte of data to the USB CDC interface.
func (usbcdc *USBCDC) WriteByte(c byte) error {
// Supposedly to handle problem with Windows USB serial ports?
if usbLineInfo.lineState > 0 {
ok := false
for {
mask := interrupt.Disable()
idx := usbcdc.TxIdx.Get()
if (idx & usbcdcTxSizeMask) < usbcdcTxSizeMask {
udd_ep_in_cache_buffer[usb_CDC_ENDPOINT_IN][idx] = c
usbcdc.TxIdx.Set(idx + 1)
ok = true
}
interrupt.Restore(mask)
if ok {
break
} else if usbcdcTxMaxRetriesAllowed < usbcdc.waitTxcRetryCount {
mask := interrupt.Disable()
usbcdc.waitTxc = false
usbcdc.waitTxcRetryCount = 0
usbcdc.TxIdx.Set(0)
usbLineInfo.lineState = 0
interrupt.Restore(mask)
break
} else {
mask := interrupt.Disable()
if usbcdc.sent {
if usbcdc.waitTxc {
if (getEPINTFLAG(usb_CDC_ENDPOINT_IN) & sam.USB_DEVICE_EPINTFLAG_TRCPT1) != 0 {
setEPSTATUSCLR(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_EPSTATUSCLR_BK1RDY)
setEPINTFLAG(usb_CDC_ENDPOINT_IN, sam.USB_DEVICE_EPINTFLAG_TRCPT1)
usbcdc.waitTxc = false
usbcdc.Flush()
}
} else {
usbcdc.Flush()
}
}
interrupt.Restore(mask)
}
}
}
return nil
}
func (usbcdc *USBCDC) DTR() bool {
return (usbLineInfo.lineState & usb_CDC_LINESTATE_DTR) > 0
}
func (usbcdc *USBCDC) RTS() bool {
return (usbLineInfo.lineState & usb_CDC_LINESTATE_RTS) > 0
}
const (
// these are SAMD21 specific.
usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos = 0
@@ -193,10 +66,6 @@ func (dev *USBDevice) Configure(config UARTConfig) {
dev.initcomplete = true
}
func (usbcdc *USBCDC) Configure(config UARTConfig) {
// dummy
}
func handlePadCalibration() {
// Load Pad Calibration data from non-volatile memory
// This requires registers that are not included in the SVD file.
@@ -258,11 +127,7 @@ func handleUSBIRQ(intr interrupt.Interrupt) {
// Start of frame
if (flags & sam.USB_DEVICE_INTFLAG_SOF) > 0 {
USB.Flush()
// if you want to blink LED showing traffic, this would be the place...
if hidCallback != nil && !waitHidTxc {
hidCallback()
}
}
// Endpoint 0 Setup interrupt
@@ -283,11 +148,8 @@ func handleUSBIRQ(intr interrupt.Interrupt) {
ok = handleStandardSetup(setup)
} else {
// Class Interface Requests
if setup.WIndex == usb_CDC_ACM_INTERFACE {
ok = cdcSetup(setup)
} else if setup.BmRequestType == usb_SET_REPORT_TYPE && setup.BRequest == usb_SET_IDLE {
SendZlp()
ok = true
if setup.WIndex < uint16(len(usbSetupHandler)) && usbSetupHandler[setup.WIndex] != nil {
ok = usbSetupHandler[setup.WIndex](setup)
}
}
@@ -313,22 +175,16 @@ func handleUSBIRQ(intr interrupt.Interrupt) {
for i = 1; i < uint32(len(endPoints)); i++ {
// Check if endpoint has a pending interrupt
epFlags := getEPINTFLAG(i)
if (epFlags&sam.USB_DEVICE_EPINTFLAG_TRCPT0) > 0 ||
(epFlags&sam.USB_DEVICE_EPINTFLAG_TRCPT1) > 0 {
switch i {
case usb_CDC_ENDPOINT_OUT:
handleEndpoint(i)
setEPINTFLAG(i, epFlags)
case usb_CDC_ENDPOINT_IN, usb_CDC_ENDPOINT_ACM:
setEPSTATUSCLR(i, sam.USB_DEVICE_EPSTATUSCLR_BK1RDY)
setEPINTFLAG(i, sam.USB_DEVICE_EPINTFLAG_TRCPT1)
if i == usb_CDC_ENDPOINT_IN {
USB.waitTxc = false
}
case usb_HID_ENDPOINT_IN:
setEPINTFLAG(i, sam.USB_DEVICE_EPINTFLAG_TRCPT1)
waitHidTxc = false
setEPINTFLAG(i, epFlags)
if (epFlags & sam.USB_DEVICE_EPINTFLAG_TRCPT0) > 0 {
buf := handleEndpointRx(i)
if usbRxHandler[i] != nil {
usbRxHandler[i](buf)
}
handleEndpointRxComplete(i)
} else if (epFlags & sam.USB_DEVICE_EPINTFLAG_TRCPT1) > 0 {
if usbTxHandler[i] != nil {
usbTxHandler[i]()
}
}
}
@@ -448,66 +304,8 @@ func handleUSBSetAddress(setup USBSetup) bool {
return true
}
func cdcSetup(setup USBSetup) bool {
if setup.BmRequestType == usb_REQUEST_DEVICETOHOST_CLASS_INTERFACE {
if setup.BRequest == usb_CDC_GET_LINE_CODING {
var b [cdcLineInfoSize]byte
b[0] = byte(usbLineInfo.dwDTERate)
b[1] = byte(usbLineInfo.dwDTERate >> 8)
b[2] = byte(usbLineInfo.dwDTERate >> 16)
b[3] = byte(usbLineInfo.dwDTERate >> 24)
b[4] = byte(usbLineInfo.bCharFormat)
b[5] = byte(usbLineInfo.bParityType)
b[6] = byte(usbLineInfo.bDataBits)
sendUSBPacket(0, b[:], setup.WLength)
return true
}
}
if setup.BmRequestType == usb_REQUEST_HOSTTODEVICE_CLASS_INTERFACE {
if setup.BRequest == usb_CDC_SET_LINE_CODING {
b, err := receiveUSBControlPacket()
if err != nil {
return false
}
usbLineInfo.dwDTERate = uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
usbLineInfo.bCharFormat = b[4]
usbLineInfo.bParityType = b[5]
usbLineInfo.bDataBits = b[6]
}
if setup.BRequest == usb_CDC_SET_CONTROL_LINE_STATE {
usbLineInfo.lineState = setup.WValueL
}
if setup.BRequest == usb_CDC_SET_LINE_CODING || setup.BRequest == usb_CDC_SET_CONTROL_LINE_STATE {
// auto-reset into the bootloader
if usbLineInfo.dwDTERate == 1200 && usbLineInfo.lineState&usb_CDC_LINESTATE_DTR == 0 {
EnterBootloader()
} else {
// TODO: cancel any reset
}
SendZlp()
}
if setup.BRequest == usb_CDC_SEND_BREAK {
// TODO: something with this value?
// breakValue = ((uint16_t)setup.wValueH << 8) | setup.wValueL;
// return false;
SendZlp()
}
return true
}
return false
}
// SendUSBHIDPacket sends a packet for USBHID (interrupt / in).
func SendUSBHIDPacket(ep uint32, data []byte) bool {
if waitHidTxc {
return false
}
// SendUSBInPacket sends a packet for USB (interrupt in / bulk in).
func SendUSBInPacket(ep uint32, data []byte) bool {
sendUSBPacket(ep, data, 0)
// clear transfer complete flag
@@ -516,8 +314,6 @@ func SendUSBHIDPacket(ep uint32, data []byte) bool {
// send data by setting bank ready
setEPSTATUSSET(ep, sam.USB_DEVICE_EPSTATUSSET_BK1RDY)
waitHidTxc = true
return true
}
@@ -527,10 +323,15 @@ func sendUSBPacket(ep uint32, data []byte, maxsize uint16) {
if 0 < maxsize && maxsize < l {
l = maxsize
}
copy(udd_ep_in_cache_buffer[ep][:], data[:l])
// Set endpoint address for sending data
usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep]))))
if ep == 0 {
copy(udd_ep_control_cache_buffer[:], data[:l])
usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_control_cache_buffer))))
} else {
copy(udd_ep_in_cache_buffer[ep][:], data[:l])
usbEndpointDescriptors[ep].DeviceDescBank[1].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_in_cache_buffer[ep]))))
}
// clear multi-packet size which is total bytes already sent
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Mask << usb_DEVICE_PCKSIZE_MULTI_PACKET_SIZE_Pos)
@@ -540,7 +341,7 @@ func sendUSBPacket(ep uint32, data []byte, maxsize uint16) {
usbEndpointDescriptors[ep].DeviceDescBank[1].PCKSIZE.SetBits((uint32(l) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask) << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
}
func receiveUSBControlPacket() ([cdcLineInfoSize]byte, error) {
func ReceiveUSBControlPacket() ([cdcLineInfoSize]byte, error) {
var b [cdcLineInfoSize]byte
// address
@@ -557,7 +358,7 @@ func receiveUSBControlPacket() ([cdcLineInfoSize]byte, error) {
for (getEPSTATUS(0) & sam.USB_DEVICE_EPSTATUS_BK0RDY) == 0 {
timeout--
if timeout == 0 {
return b, errUSBCDCReadTimeout
return b, ErrUSBReadTimeout
}
}
@@ -566,7 +367,7 @@ func receiveUSBControlPacket() ([cdcLineInfoSize]byte, error) {
for (getEPINTFLAG(0) & sam.USB_DEVICE_EPINTFLAG_TRCPT0) == 0 {
timeout--
if timeout == 0 {
return b, errUSBCDCReadTimeout
return b, ErrUSBReadTimeout
}
}
@@ -575,7 +376,7 @@ func receiveUSBControlPacket() ([cdcLineInfoSize]byte, error) {
usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask)
if bytesread != cdcLineInfoSize {
return b, errUSBCDCBytesRead
return b, ErrUSBBytesRead
}
copy(b[:7], udd_ep_out_cache_buffer[0][:7])
@@ -583,16 +384,15 @@ func receiveUSBControlPacket() ([cdcLineInfoSize]byte, error) {
return b, nil
}
func handleEndpoint(ep uint32) {
func handleEndpointRx(ep uint32) []byte {
// get data
count := int((usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.Get() >>
usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos) & usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask)
// move to ring buffer
for i := 0; i < count; i++ {
USB.Receive(byte((udd_ep_out_cache_buffer[ep][i] & 0xFF)))
}
return udd_ep_out_cache_buffer[ep][:count]
}
func handleEndpointRxComplete(ep uint32) {
// set byte count to zero
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)
@@ -601,6 +401,7 @@ func handleEndpoint(ep uint32) {
// set ready for next data
setEPSTATUSCLR(ep, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)
}
func SendZlp() {