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Apple_II_Keyboard/libraries/USB_Host_Shield_Library_2.0/hiduniversal.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 "hiduniversal.h"
HIDUniversal::HIDUniversal(USB *p) :
USBHID(p),
qNextPollTime(0),
pollInterval(0),
bPollEnable(false),
bHasReportId(false) {
Initialize();
if(pUsb)
pUsb->RegisterDeviceClass(this);
}
uint16_t HIDUniversal::GetHidClassDescrLen(uint8_t type, uint8_t num) {
for(uint8_t i = 0, n = 0; i < HID_MAX_HID_CLASS_DESCRIPTORS; i++) {
if(descrInfo[i].bDescrType == type) {
if(n == num)
return descrInfo[i].wDescriptorLength;
n++;
}
}
return 0;
}
void HIDUniversal::Initialize() {
for(uint8_t i = 0; i < MAX_REPORT_PARSERS; i++) {
rptParsers[i].rptId = 0;
rptParsers[i].rptParser = NULL;
}
for(uint8_t i = 0; i < HID_MAX_HID_CLASS_DESCRIPTORS; i++) {
descrInfo[i].bDescrType = 0;
descrInfo[i].wDescriptorLength = 0;
}
for(uint8_t i = 0; i < maxHidInterfaces; i++) {
hidInterfaces[i].bmInterface = 0;
hidInterfaces[i].bmProtocol = 0;
for(uint8_t j = 0; j < maxEpPerInterface; j++)
hidInterfaces[i].epIndex[j] = 0;
}
for(uint8_t i = 0; i < totalEndpoints; i++) {
epInfo[i].epAddr = 0;
epInfo[i].maxPktSize = (i) ? 0 : 8;
epInfo[i].bmSndToggle = 0;
epInfo[i].bmRcvToggle = 0;
epInfo[i].bmNakPower = (i) ? USB_NAK_NOWAIT : USB_NAK_MAX_POWER;
}
bNumEP = 1;
bNumIface = 0;
bConfNum = 0;
pollInterval = 0;
ZeroMemory(constBuffLen, prevBuf);
}
bool HIDUniversal::SetReportParser(uint8_t id, HIDReportParser *prs) {
for(uint8_t i = 0; i < MAX_REPORT_PARSERS; i++) {
if(rptParsers[i].rptId == 0 && rptParsers[i].rptParser == NULL) {
rptParsers[i].rptId = id;
rptParsers[i].rptParser = prs;
return true;
}
}
return false;
}
HIDReportParser* HIDUniversal::GetReportParser(uint8_t id) {
if(!bHasReportId)
return ((rptParsers[0].rptParser) ? rptParsers[0].rptParser : NULL);
for(uint8_t i = 0; i < MAX_REPORT_PARSERS; i++) {
if(rptParsers[i].rptId == id)
return rptParsers[i].rptParser;
}
return NULL;
}
uint8_t HIDUniversal::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 len = 0;
uint8_t num_of_conf; // number of configurations
//uint8_t num_of_intf; // number of interfaces
AddressPool &addrPool = pUsb->GetAddressPool();
USBTRACE("HU 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, 8, (uint8_t*)buf);
if(!rcode)
len = (buf[0] > constBufSize) ? constBufSize : buf[0];
if(rcode) {
// Restore p->epinfo
p->epinfo = oldep_ptr;
goto FailGetDevDescr;
}
// Restore p->epinfo
p->epinfo = oldep_ptr;
// 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;
}
//delay(2); //per USB 2.0 sect.9.2.6.3
USBTRACE2("Addr:", bAddress);
p->lowspeed = false;
p = addrPool.GetUsbDevicePtr(bAddress);
if(!p)
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
p->lowspeed = lowspeed;
if(len)
rcode = pUsb->getDevDescr(bAddress, 0, len, (uint8_t*)buf);
if(rcode)
goto FailGetDevDescr;
VID = udd->idVendor; // Can be used by classes that inherits this class to check the VID and PID of the connected device
PID = udd->idProduct;
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++) {
//HexDumper<USBReadParser, uint16_t, uint16_t> HexDump;
ConfigDescParser<USB_CLASS_HID, 0, 0,
CP_MASK_COMPARE_CLASS> confDescrParser(this);
//rcode = pUsb->getConfDescr(bAddress, 0, i, &HexDump);
rcode = pUsb->getConfDescr(bAddress, 0, i, &confDescrParser);
if(rcode)
goto FailGetConfDescr;
if(bNumEP > 1)
break;
} // for
if(bNumEP < 2)
return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;
// Assign epInfo to epinfo pointer
rcode = pUsb->setEpInfoEntry(bAddress, bNumEP, epInfo);
USBTRACE2("Cnf:", bConfNum);
// Set Configuration Value
rcode = pUsb->setConf(bAddress, 0, bConfNum);
if(rcode)
goto FailSetConfDescr;
for(uint8_t i = 0; i < bNumIface; i++) {
if(hidInterfaces[i].epIndex[epInterruptInIndex] == 0)
continue;
rcode = SetIdle(hidInterfaces[i].bmInterface, 0, 0);
if(rcode && rcode != hrSTALL)
goto FailSetIdle;
}
USBTRACE("HU configured\r\n");
OnInitSuccessful();
bPollEnable = true;
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
FailSetIdle:
#ifdef DEBUG_USB_HOST
USBTRACE("SetIdle:");
#endif
#ifdef DEBUG_USB_HOST
Fail:
NotifyFail(rcode);
#endif
Release();
return rcode;
}
HIDUniversal::HIDInterface* HIDUniversal::FindInterface(uint8_t iface, uint8_t alt, uint8_t proto) {
for(uint8_t i = 0; i < bNumIface && i < maxHidInterfaces; i++)
if(hidInterfaces[i].bmInterface == iface && hidInterfaces[i].bmAltSet == alt
&& hidInterfaces[i].bmProtocol == proto)
return hidInterfaces + i;
return NULL;
}
void HIDUniversal::EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *pep) {
// If the first configuration satisfies, the others are not concidered.
if(bNumEP > 1 && conf != bConfNum)
return;
//ErrorMessage<uint8_t>(PSTR("\r\nConf.Val"), conf);
//ErrorMessage<uint8_t>(PSTR("Iface Num"), iface);
//ErrorMessage<uint8_t>(PSTR("Alt.Set"), alt);
bConfNum = conf;
uint8_t index = 0;
HIDInterface *piface = FindInterface(iface, alt, proto);
// Fill in interface structure in case of new interface
if(!piface) {
piface = hidInterfaces + bNumIface;
piface->bmInterface = iface;
piface->bmAltSet = alt;
piface->bmProtocol = proto;
bNumIface++;
}
if((pep->bmAttributes & bmUSB_TRANSFER_TYPE) == USB_TRANSFER_TYPE_INTERRUPT)
index = (pep->bEndpointAddress & 0x80) == 0x80 ? epInterruptInIndex : epInterruptOutIndex;
if(index) {
// Fill in the endpoint info structure
epInfo[bNumEP].epAddr = (pep->bEndpointAddress & 0x0F);
epInfo[bNumEP].maxPktSize = (uint8_t)pep->wMaxPacketSize;
epInfo[bNumEP].bmSndToggle = 0;
epInfo[bNumEP].bmRcvToggle = 0;
epInfo[bNumEP].bmNakPower = USB_NAK_NOWAIT;
// Fill in the endpoint index list
piface->epIndex[index] = bNumEP; //(pep->bEndpointAddress & 0x0F);
if(pollInterval < pep->bInterval) // Set the polling interval as the largest polling interval obtained from endpoints
pollInterval = pep->bInterval;
bNumEP++;
}
//PrintEndpointDescriptor(pep);
}
uint8_t HIDUniversal::Release() {
pUsb->GetAddressPool().FreeAddress(bAddress);
bNumEP = 1;
bAddress = 0;
qNextPollTime = 0;
bPollEnable = false;
return 0;
}
bool HIDUniversal::BuffersIdentical(uint8_t len, uint8_t *buf1, uint8_t *buf2) {
for(uint8_t i = 0; i < len; i++)
if(buf1[i] != buf2[i])
return false;
return true;
}
void HIDUniversal::ZeroMemory(uint8_t len, uint8_t *buf) {
for(uint8_t i = 0; i < len; i++)
buf[i] = 0;
}
void HIDUniversal::SaveBuffer(uint8_t len, uint8_t *src, uint8_t *dest) {
for(uint8_t i = 0; i < len; i++)
dest[i] = src[i];
}
uint8_t HIDUniversal::Poll() {
uint8_t rcode = 0;
if(!bPollEnable)
return 0;
if((int32_t)((uint32_t)millis() - qNextPollTime) >= 0L) {
qNextPollTime = (uint32_t)millis() + pollInterval;
uint8_t buf[constBuffLen];
for(uint8_t i = 0; i < bNumIface; i++) {
uint8_t index = hidInterfaces[i].epIndex[epInterruptInIndex];
uint16_t read = (uint16_t)epInfo[index].maxPktSize;
ZeroMemory(constBuffLen, buf);
uint8_t rcode = pUsb->inTransfer(bAddress, epInfo[index].epAddr, &read, buf);
if(rcode) {
if(rcode != hrNAK)
USBTRACE3("(hiduniversal.h) Poll:", rcode, 0x81);
return rcode;
}
if(read > constBuffLen)
read = constBuffLen;
bool identical = BuffersIdentical(read, buf, prevBuf);
SaveBuffer(read, buf, prevBuf);
if(identical)
return 0;
#if 0
Notify(PSTR("\r\nBuf: "), 0x80);
for(uint8_t i = 0; i < read; i++) {
D_PrintHex<uint8_t > (buf[i], 0x80);
Notify(PSTR(" "), 0x80);
}
Notify(PSTR("\r\n"), 0x80);
#endif
ParseHIDData(this, bHasReportId, (uint8_t)read, buf);
HIDReportParser *prs = GetReportParser(((bHasReportId) ? *buf : 0));
if(prs)
prs->Parse(this, bHasReportId, (uint8_t)read, buf);
}
}
return rcode;
}
// Send a report to interrupt out endpoint. This is NOT SetReport() request!
uint8_t HIDUniversal::SndRpt(uint16_t nbytes, uint8_t *dataptr) {
return pUsb->outTransfer(bAddress, epInfo[epInterruptOutIndex].epAddr, nbytes, dataptr);
}
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