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Apple_II_Keyboard/libraries/USB_Host_Shield_Library_2.0/adk.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
*/
/* Google ADK interface */
#include "adk.h"
const uint8_t ADK::epDataInIndex = 1;
const uint8_t ADK::epDataOutIndex = 2;
ADK::ADK(USB *p, const char* manufacturer,
const char* model,
const char* description,
const char* version,
const char* uri,
const char* serial) :
/* ADK ID Strings */
manufacturer(manufacturer),
model(model),
description(description),
version(version),
uri(uri),
serial(serial),
pUsb(p), //pointer to USB class instance - mandatory
bAddress(0), //device address - mandatory
bConfNum(0), //configuration number
bNumEP(1), //if config descriptor needs to be parsed
ready(false) {
// initialize endpoint data structures
for(uint8_t i = 0; i < ADK_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) ? USB_NAK_NOWAIT : USB_NAK_MAX_POWER;
}//for(uint8_t i=0; i<ADK_MAX_ENDPOINTS; i++...
// register in USB subsystem
if(pUsb) {
pUsb->RegisterDeviceClass(this); //set devConfig[] entry
}
}
uint8_t ADK::ConfigureDevice(uint8_t parent, uint8_t port, bool lowspeed) {
return Init(parent, port, lowspeed); // Just call Init. Yes, really!
}
/* Connection initialization of an Android phone */
uint8_t ADK::Init(uint8_t parent, uint8_t port, bool lowspeed) {
uint8_t buf[sizeof (USB_DEVICE_DESCRIPTOR)];
USB_DEVICE_DESCRIPTOR * udd = reinterpret_cast<USB_DEVICE_DESCRIPTOR*>(buf);
uint8_t rcode;
uint8_t num_of_conf; // number of configurations
UsbDevice *p = NULL;
EpInfo *oldep_ptr = NULL;
// get memory address of USB device address pool
AddressPool &addrPool = pUsb->GetAddressPool();
USBTRACE("\r\nADK Init");
// check if address has already been assigned to an instance
if(bAddress) {
USBTRACE("\r\nAddress in use");
return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;
}
// Get pointer to pseudo device with address 0 assigned
p = addrPool.GetUsbDevicePtr(0);
if(!p) {
USBTRACE("\r\nAddress not found");
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
}
if(!p->epinfo) {
USBTRACE("epinfo is null\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, sizeof (USB_DEVICE_DESCRIPTOR), (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);
// Extract Max Packet Size from 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;
}//if (rcode...
//USBTRACE2("\r\nAddr:", bAddress);
// Spec says you should wait at least 200ms.
//delay(300);
p->lowspeed = false;
//get pointer to assigned address record
p = addrPool.GetUsbDevicePtr(bAddress);
if(!p) {
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
}
p->lowspeed = lowspeed;
// Assign epInfo to epinfo pointer - only EP0 is known
rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);
if(rcode) {
goto FailSetDevTblEntry;
}
//check if ADK device is already in accessory mode; if yes, configure and exit
if(udd->idVendor == ADK_VID &&
(udd->idProduct == ADK_PID || udd->idProduct == ADB_PID)) {
USBTRACE("\r\nAcc.mode device detected");
/* go through configurations, find first bulk-IN, bulk-OUT EP, fill epInfo and quit */
num_of_conf = udd->bNumConfigurations;
//USBTRACE2("\r\nNC:",num_of_conf);
for(uint8_t i = 0; i < num_of_conf; i++) {
ConfigDescParser < 0, 0, 0, 0 > confDescrParser(this);
delay(1);
rcode = pUsb->getConfDescr(bAddress, 0, i, &confDescrParser);
#if defined(XOOM)
//added by Jaylen Scott Vanorden
if(rcode) {
USBTRACE2("\r\nGot 1st bad code for config: ", rcode);
// Try once more
rcode = pUsb->getConfDescr(bAddress, 0, i, &confDescrParser);
}
#endif
if(rcode) {
goto FailGetConfDescr;
}
if(bNumEP > 2) {
break;
}
} // for (uint8_t i=0; i<num_of_conf; i++...
if(bNumEP == 3) {
// Assign epInfo to epinfo pointer - this time all 3 endpoins
rcode = pUsb->setEpInfoEntry(bAddress, 3, epInfo);
if(rcode) {
goto FailSetDevTblEntry;
}
}
// Set Configuration Value
rcode = pUsb->setConf(bAddress, 0, bConfNum);
if(rcode) {
goto FailSetConfDescr;
}
/* print endpoint structure */
/*
USBTRACE("\r\nEndpoint Structure:");
USBTRACE("\r\nEP0:");
USBTRACE2("\r\nAddr: ", epInfo[0].epAddr);
USBTRACE2("\r\nMax.pkt.size: ", epInfo[0].maxPktSize);
USBTRACE2("\r\nAttr: ", epInfo[0].epAttribs);
USBTRACE("\r\nEpout:");
USBTRACE2("\r\nAddr: ", epInfo[epDataOutIndex].epAddr);
USBTRACE2("\r\nMax.pkt.size: ", epInfo[epDataOutIndex].maxPktSize);
USBTRACE2("\r\nAttr: ", epInfo[epDataOutIndex].epAttribs);
USBTRACE("\r\nEpin:");
USBTRACE2("\r\nAddr: ", epInfo[epDataInIndex].epAddr);
USBTRACE2("\r\nMax.pkt.size: ", epInfo[epDataInIndex].maxPktSize);
USBTRACE2("\r\nAttr: ", epInfo[epDataInIndex].epAttribs);
*/
USBTRACE("\r\nConfiguration successful");
ready = true;
return 0; //successful configuration
}//if( buf->idVendor == ADK_VID...
//probe device - get accessory protocol revision
{
uint16_t adkproto = -1;
delay(1);
rcode = getProto((uint8_t*) & adkproto);
#if defined(XOOM)
//added by Jaylen Scott Vanorden
if(rcode) {
USBTRACE2("\r\nGot 1st bad code for proto: ", rcode);
// Try once more
rcode = getProto((uint8_t*) & adkproto);
}
#endif
if(rcode) {
goto FailGetProto; //init fails
}
USBTRACE2("\r\nADK protocol rev. ", adkproto);
}
delay(100);
//sending ID strings
sendStr(ACCESSORY_STRING_MANUFACTURER, manufacturer);
delay(10);
sendStr(ACCESSORY_STRING_MODEL, model);
delay(10);
sendStr(ACCESSORY_STRING_DESCRIPTION, description);
delay(10);
sendStr(ACCESSORY_STRING_VERSION, version);
delay(10);
sendStr(ACCESSORY_STRING_URI, uri);
delay(10);
sendStr(ACCESSORY_STRING_SERIAL, serial);
delay(100);
//switch to accessory mode
//the Android phone will reset
rcode = switchAcc();
if(rcode) {
goto FailSwAcc; //init fails
}
rcode = USB_ERROR_CONFIG_REQUIRES_ADDITIONAL_RESET;
delay(100); // Give Android a chance to do its reset. This is a guess, and possibly could be lower.
goto SwAttempt; //switch to accessory mode attempted
/* diagnostic messages */
FailGetDevDescr:
#ifdef DEBUG_USB_HOST
NotifyFailGetDevDescr(rcode);
goto Fail;
#endif
FailSetDevTblEntry:
#ifdef DEBUG_USB_HOST
NotifyFailSetDevTblEntry(rcode);
goto Fail;
#endif
FailGetConfDescr:
#ifdef DEBUG_USB_HOST
NotifyFailGetConfDescr(rcode);
goto Fail;
#endif
FailSetConfDescr:
#ifdef DEBUG_USB_HOST
NotifyFailSetConfDescr(rcode);
goto Fail;
#endif
FailGetProto:
#ifdef DEBUG_USB_HOST
USBTRACE("\r\ngetProto:");
goto Fail;
#endif
FailSwAcc:
#ifdef DEBUG_USB_HOST
USBTRACE("\r\nswAcc:");
goto Fail;
#endif
//FailOnInit:
// USBTRACE("OnInit:");
// goto Fail;
//
SwAttempt:
#ifdef DEBUG_USB_HOST
USBTRACE("\r\nAccessory mode switch attempt");
Fail:
#endif
//USBTRACE2("\r\nADK Init Failed, error code: ", rcode);
//NotifyFail(rcode);
Release();
return rcode;
}
/* Extracts bulk-IN and bulk-OUT endpoint information from config descriptor */
void ADK::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);
//added by Yuuichi Akagawa
if(bNumEP == 3) {
return;
}
bConfNum = conf;
if((pep->bmAttributes & bmUSB_TRANSFER_TYPE) == USB_TRANSFER_TYPE_BULK) {
uint8_t index = ((pep->bEndpointAddress & 0x80) == 0x80) ? epDataInIndex : epDataOutIndex;
// Fill in the endpoint info structure
epInfo[index].epAddr = (pep->bEndpointAddress & 0x0F);
epInfo[index].maxPktSize = (uint8_t)pep->wMaxPacketSize;
bNumEP++;
//PrintEndpointDescriptor(pep);
}
}
/* Performs a cleanup after failed Init() attempt */
uint8_t ADK::Release() {
pUsb->GetAddressPool().FreeAddress(bAddress);
bNumEP = 1; //must have to be reset to 1
bAddress = 0;
ready = false;
return 0;
}
uint8_t ADK::RcvData(uint16_t *bytes_rcvd, uint8_t *dataptr) {
//USBTRACE2("\r\nAddr: ", bAddress );
//USBTRACE2("\r\nEP: ",epInfo[epDataInIndex].epAddr);
return pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
}
uint8_t ADK::SndData(uint16_t nbytes, uint8_t *dataptr) {
return pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, nbytes, dataptr);
}
void ADK::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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