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Apple_II_Keyboard/libraries/USB_Host_Shield_Library_2.0/cdcacm.cpp

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/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").
Contact information
-------------------
Circuits At Home, LTD
Web : http://www.circuitsathome.com
e-mail : support@circuitsathome.com
*/
#include "cdcacm.h"
const uint8_t ACM::epDataInIndex = 1;
const uint8_t ACM::epDataOutIndex = 2;
const uint8_t ACM::epInterruptInIndex = 3;
ACM::ACM(USB *p, CDCAsyncOper *pasync) :
pUsb(p),
pAsync(pasync),
bAddress(0),
bControlIface(0),
bDataIface(0),
bNumEP(1),
qNextPollTime(0),
bPollEnable(false),
ready(false) {
_enhanced_status = enhanced_features(); // Set up features
for(uint8_t i = 0; i < ACM_MAX_ENDPOINTS; i++) {
epInfo[i].epAddr = 0;
epInfo[i].maxPktSize = (i) ? 0 : 8;
epInfo[i].bmSndToggle = 0;
epInfo[i].bmRcvToggle = 0;
epInfo[i].bmNakPower = (i == epDataInIndex) ? USB_NAK_NOWAIT : USB_NAK_MAX_POWER;
}
if(pUsb)
pUsb->RegisterDeviceClass(this);
}
uint8_t ACM::Init(uint8_t parent, uint8_t port, bool lowspeed) {
const uint8_t constBufSize = sizeof (USB_DEVICE_DESCRIPTOR);
uint8_t buf[constBufSize];
USB_DEVICE_DESCRIPTOR * udd = reinterpret_cast<USB_DEVICE_DESCRIPTOR*>(buf);
uint8_t rcode;
UsbDevice *p = NULL;
EpInfo *oldep_ptr = NULL;
uint8_t num_of_conf; // number of configurations
AddressPool &addrPool = pUsb->GetAddressPool();
USBTRACE("ACM Init\r\n");
if(bAddress)
return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;
// Get pointer to pseudo device with address 0 assigned
p = addrPool.GetUsbDevicePtr(0);
if(!p)
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
if(!p->epinfo) {
USBTRACE("epinfo\r\n");
return USB_ERROR_EPINFO_IS_NULL;
}
// Save old pointer to EP_RECORD of address 0
oldep_ptr = p->epinfo;
// Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
p->epinfo = epInfo;
p->lowspeed = lowspeed;
// Get device descriptor
rcode = pUsb->getDevDescr(0, 0, constBufSize, (uint8_t*)buf);
// Restore p->epinfo
p->epinfo = oldep_ptr;
if(rcode)
goto FailGetDevDescr;
// Allocate new address according to device class
bAddress = addrPool.AllocAddress(parent, false, port);
if(!bAddress)
return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;
// Extract Max Packet Size from the device descriptor
epInfo[0].maxPktSize = udd->bMaxPacketSize0;
// Assign new address to the device
rcode = pUsb->setAddr(0, 0, bAddress);
if(rcode) {
p->lowspeed = false;
addrPool.FreeAddress(bAddress);
bAddress = 0;
USBTRACE2("setAddr:", rcode);
return rcode;
}
USBTRACE2("Addr:", bAddress);
p->lowspeed = false;
p = addrPool.GetUsbDevicePtr(bAddress);
if(!p)
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
p->lowspeed = lowspeed;
num_of_conf = udd->bNumConfigurations;
// Assign epInfo to epinfo pointer
rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);
if(rcode)
goto FailSetDevTblEntry;
USBTRACE2("NC:", num_of_conf);
for(uint8_t i = 0; i < num_of_conf; i++) {
ConfigDescParser< USB_CLASS_COM_AND_CDC_CTRL,
CDC_SUBCLASS_ACM,
CDC_PROTOCOL_ITU_T_V_250,
CP_MASK_COMPARE_CLASS |
CP_MASK_COMPARE_SUBCLASS |
CP_MASK_COMPARE_PROTOCOL > CdcControlParser(this);
ConfigDescParser<USB_CLASS_CDC_DATA, 0, 0,
CP_MASK_COMPARE_CLASS> CdcDataParser(this);
rcode = pUsb->getConfDescr(bAddress, 0, i, &CdcControlParser);
if(rcode)
goto FailGetConfDescr;
rcode = pUsb->getConfDescr(bAddress, 0, i, &CdcDataParser);
if(rcode)
goto FailGetConfDescr;
if(bNumEP > 1)
break;
} // for
if(bNumEP < 4)
return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;
// Assign epInfo to epinfo pointer
rcode = pUsb->setEpInfoEntry(bAddress, bNumEP, epInfo);
USBTRACE2("Conf:", bConfNum);
// Set Configuration Value
rcode = pUsb->setConf(bAddress, 0, bConfNum);
if(rcode)
goto FailSetConfDescr;
// Set up features status
_enhanced_status = enhanced_features();
half_duplex(false);
autoflowRTS(false);
autoflowDSR(false);
autoflowXON(false);
wide(false); // Always false, because this is only available in custom mode.
rcode = pAsync->OnInit(this);
if(rcode)
goto FailOnInit;
USBTRACE("ACM configured\r\n");
ready = true;
//bPollEnable = true;
//USBTRACE("Poll enabled\r\n");
return 0;
FailGetDevDescr:
#ifdef DEBUG_USB_HOST
NotifyFailGetDevDescr();
goto Fail;
#endif
FailSetDevTblEntry:
#ifdef DEBUG_USB_HOST
NotifyFailSetDevTblEntry();
goto Fail;
#endif
FailGetConfDescr:
#ifdef DEBUG_USB_HOST
NotifyFailGetConfDescr();
goto Fail;
#endif
FailSetConfDescr:
#ifdef DEBUG_USB_HOST
NotifyFailSetConfDescr();
goto Fail;
#endif
FailOnInit:
#ifdef DEBUG_USB_HOST
USBTRACE("OnInit:");
#endif
#ifdef DEBUG_USB_HOST
Fail:
NotifyFail(rcode);
#endif
Release();
return rcode;
}
void ACM::EndpointXtract(uint8_t conf, uint8_t iface __attribute__((unused)), uint8_t alt __attribute__((unused)), uint8_t proto __attribute__((unused)), const USB_ENDPOINT_DESCRIPTOR *pep) {
//ErrorMessage<uint8_t > (PSTR("Conf.Val"), conf);
//ErrorMessage<uint8_t > (PSTR("Iface Num"), iface);
//ErrorMessage<uint8_t > (PSTR("Alt.Set"), alt);
bConfNum = conf;
uint8_t index;
if((pep->bmAttributes & bmUSB_TRANSFER_TYPE) == USB_TRANSFER_TYPE_INTERRUPT && (pep->bEndpointAddress & 0x80) == 0x80)
index = epInterruptInIndex;
else if((pep->bmAttributes & bmUSB_TRANSFER_TYPE) == USB_TRANSFER_TYPE_BULK)
index = ((pep->bEndpointAddress & 0x80) == 0x80) ? epDataInIndex : epDataOutIndex;
else
return;
// Fill in the endpoint info structure
epInfo[index].epAddr = (pep->bEndpointAddress & 0x0F);
epInfo[index].maxPktSize = (uint8_t)pep->wMaxPacketSize;
epInfo[index].bmSndToggle = 0;
epInfo[index].bmRcvToggle = 0;
bNumEP++;
PrintEndpointDescriptor(pep);
}
uint8_t ACM::Release() {
ready = false;
pUsb->GetAddressPool().FreeAddress(bAddress);
bControlIface = 0;
bDataIface = 0;
bNumEP = 1;
bAddress = 0;
qNextPollTime = 0;
bPollEnable = false;
return 0;
}
uint8_t ACM::Poll() {
//uint8_t rcode = 0;
//if(!bPollEnable)
// return 0;
//return rcode;
return 0;
}
uint8_t ACM::RcvData(uint16_t *bytes_rcvd, uint8_t *dataptr) {
uint8_t rv = pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::SndData(uint16_t nbytes, uint8_t *dataptr) {
uint8_t rv = pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, nbytes, dataptr);
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::SetCommFeature(uint16_t fid, uint8_t nbytes, uint8_t *dataptr) {
uint8_t rv = ( pUsb->ctrlReq(bAddress, 0, bmREQ_CDCOUT, CDC_SET_COMM_FEATURE, (fid & 0xff), (fid >> 8), bControlIface, nbytes, nbytes, dataptr, NULL));
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::GetCommFeature(uint16_t fid, uint8_t nbytes, uint8_t *dataptr) {
uint8_t rv = ( pUsb->ctrlReq(bAddress, 0, bmREQ_CDCIN, CDC_GET_COMM_FEATURE, (fid & 0xff), (fid >> 8), bControlIface, nbytes, nbytes, dataptr, NULL));
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::ClearCommFeature(uint16_t fid) {
uint8_t rv = ( pUsb->ctrlReq(bAddress, 0, bmREQ_CDCOUT, CDC_CLEAR_COMM_FEATURE, (fid & 0xff), (fid >> 8), bControlIface, 0, 0, NULL, NULL));
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::SetLineCoding(const LINE_CODING *dataptr) {
uint8_t rv = ( pUsb->ctrlReq(bAddress, 0, bmREQ_CDCOUT, CDC_SET_LINE_CODING, 0x00, 0x00, bControlIface, sizeof (LINE_CODING), sizeof (LINE_CODING), (uint8_t*)dataptr, NULL));
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::GetLineCoding(LINE_CODING *dataptr) {
uint8_t rv = ( pUsb->ctrlReq(bAddress, 0, bmREQ_CDCIN, CDC_GET_LINE_CODING, 0x00, 0x00, bControlIface, sizeof (LINE_CODING), sizeof (LINE_CODING), (uint8_t*)dataptr, NULL));
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::SetControlLineState(uint8_t state) {
uint8_t rv = ( pUsb->ctrlReq(bAddress, 0, bmREQ_CDCOUT, CDC_SET_CONTROL_LINE_STATE, state, 0, bControlIface, 0, 0, NULL, NULL));
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
uint8_t ACM::SendBreak(uint16_t duration) {
uint8_t rv = ( pUsb->ctrlReq(bAddress, 0, bmREQ_CDCOUT, CDC_SEND_BREAK, (duration & 0xff), (duration >> 8), bControlIface, 0, 0, NULL, NULL));
if(rv && rv != hrNAK) {
Release();
}
return rv;
}
void ACM::PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr) {
Notify(PSTR("Endpoint descriptor:"), 0x80);
Notify(PSTR("\r\nLength:\t\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bLength, 0x80);
Notify(PSTR("\r\nType:\t\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bDescriptorType, 0x80);
Notify(PSTR("\r\nAddress:\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bEndpointAddress, 0x80);
Notify(PSTR("\r\nAttributes:\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bmAttributes, 0x80);
Notify(PSTR("\r\nMaxPktSize:\t"), 0x80);
D_PrintHex<uint16_t > (ep_ptr->wMaxPacketSize, 0x80);
Notify(PSTR("\r\nPoll Intrv:\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bInterval, 0x80);
Notify(PSTR("\r\n"), 0x80);
}
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