mirror of
https://github.com/felis/USB_Host_Shield_2.0.git
synced 2024-03-22 11:31:26 +01:00
340 lines
9.7 KiB
C++
340 lines
9.7 KiB
C++
/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
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This software may be distributed and modified under the terms of the GNU
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General Public License version 2 (GPL2) as published by the Free Software
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Foundation and appearing in the file GPL2.TXT included in the packaging of
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this file. Please note that GPL2 Section 2[b] requires that all works based
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on this software must also be made publicly available under the terms of
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the GPL2 ("Copyleft").
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Contact information
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-------------------
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Circuits At Home, LTD
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Web : http://www.circuitsathome.com
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e-mail : support@circuitsathome.com
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*/
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/* Google ADK interface */
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#include "adk.h"
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const uint8_t ADK::epDataInIndex = 1;
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const uint8_t ADK::epDataOutIndex = 2;
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ADK::ADK(USB *p, const char* manufacturer,
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const char* model,
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const char* description,
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const char* version,
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const char* uri,
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const char* serial) :
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pUsb(p), //pointer to USB class instance - mandatory
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bAddress(0), //device address - mandatory
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bNumEP(1), //if config descriptor needs to be parsed
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ready(false),
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/* ADK ID Strings */
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manufacturer(manufacturer),
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model(model),
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description(description),
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version(version),
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uri(uri),
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serial(serial)
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{
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// initialize endpoint data structures
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for(uint8_t i=0; i<ADK_MAX_ENDPOINTS; i++) {
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epInfo[i].epAddr = 0;
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epInfo[i].maxPktSize = (i) ? 0 : 8;
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epInfo[i].epAttribs = 0;
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//epInfo[i].bmNakPower = (i) ? USB_NAK_NOWAIT : USB_NAK_MAX_POWER;
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epInfo[i].bmNakPower = USB_NAK_MAX_POWER;
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}//for(uint8_t i=0; i<ADK_MAX_ENDPOINTS; i++...
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// register in USB subsystem
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if (pUsb) {
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pUsb->RegisterDeviceClass(this); //set devConfig[] entry
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}
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}
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/* Connection initialization of an Android phone */
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uint8_t ADK::Init(uint8_t parent, uint8_t port, bool lowspeed)
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{
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uint8_t buf[sizeof(USB_DEVICE_DESCRIPTOR)];
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uint8_t rcode;
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UsbDevice *p = NULL;
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EpInfo *oldep_ptr = NULL;
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uint8_t num_of_conf; // number of configurations
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// get memory address of USB device address pool
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AddressPool &addrPool = pUsb->GetAddressPool();
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USBTRACE("\r\nADK Init");
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// check if address has already been assigned to an instance
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if (bAddress) {
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USBTRACE("\r\nAddress in use");
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return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;
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}
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// Get pointer to pseudo device with address 0 assigned
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p = addrPool.GetUsbDevicePtr(0);
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if (!p) {
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USBTRACE("\r\nAddress not found");
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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}
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if (!p->epinfo) {
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USBTRACE("epinfo is null\r\n");
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return USB_ERROR_EPINFO_IS_NULL;
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}
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// Save old pointer to EP_RECORD of address 0
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oldep_ptr = p->epinfo;
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// Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
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p->epinfo = epInfo;
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p->lowspeed = lowspeed;
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// Get device descriptor
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rcode = pUsb->getDevDescr( 0, 0, sizeof(USB_DEVICE_DESCRIPTOR), (uint8_t*)buf );
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// Restore p->epinfo
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p->epinfo = oldep_ptr;
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if( rcode ){
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goto FailGetDevDescr;
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}
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// Allocate new address according to device class
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bAddress = addrPool.AllocAddress(parent, false, port);
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// Extract Max Packet Size from device descriptor
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epInfo[0].maxPktSize = (uint8_t)((USB_DEVICE_DESCRIPTOR*)buf)->bMaxPacketSize0;
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// Assign new address to the device
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rcode = pUsb->setAddr( 0, 0, bAddress );
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if (rcode) {
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p->lowspeed = false;
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addrPool.FreeAddress(bAddress);
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bAddress = 0;
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//USBTRACE2("setAddr:",rcode);
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return rcode;
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}//if (rcode...
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//USBTRACE2("\r\nAddr:", bAddress);
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p->lowspeed = false;
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//get pointer to assigned address record
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p = addrPool.GetUsbDevicePtr(bAddress);
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if (!p) {
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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}
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p->lowspeed = lowspeed;
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// Assign epInfo to epinfo pointer - only EP0 is known
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rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);
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if (rcode) {
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goto FailSetDevTblEntry;
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}
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//check if ADK device is already in accessory mode; if yes, configure and exit
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if(((USB_DEVICE_DESCRIPTOR*)buf)->idVendor == ADK_VID &&
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(((USB_DEVICE_DESCRIPTOR*)buf)->idProduct == ADK_PID || ((USB_DEVICE_DESCRIPTOR*)buf)->idProduct == ADB_PID)) {
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USBTRACE("\r\nAcc.mode device detected");
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/* go through configurations, find first bulk-IN, bulk-OUT EP, fill epInfo and quit */
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num_of_conf = ((USB_DEVICE_DESCRIPTOR*)buf)->bNumConfigurations;
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//USBTRACE2("\r\nNC:",num_of_conf);
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for (uint8_t i=0; i<num_of_conf; i++) {
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ConfigDescParser<0, 0, 0, 0> confDescrParser(this);
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rcode = pUsb->getConfDescr(bAddress, 0, i, &confDescrParser);
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if( rcode ) {
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goto FailGetConfDescr;
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}
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if( bNumEP > 2 ) {
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break;
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}
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} // for (uint8_t i=0; i<num_of_conf; i++...
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if( bNumEP == 3 ) {
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// Assign epInfo to epinfo pointer - this time all 3 endpoins
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rcode = pUsb->setEpInfoEntry(bAddress, 3, epInfo);
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if (rcode) {
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goto FailSetDevTblEntry;
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}
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}
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// Set Configuration Value
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rcode = pUsb->setConf(bAddress, 0, bConfNum);
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if( rcode ){
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goto FailSetConf;
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}
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/* print endpoint structure */
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// USBTRACE("\r\nEndpoint Structure:");
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// USBTRACE("\r\nEP0:");
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// USBTRACE2("\r\nAddr: ", epInfo[0].epAddr );
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// USBTRACE2("\r\nMax.pkt.size: ", epInfo[0].maxPktSize );
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// USBTRACE2("\r\nAttr: ", epInfo[0].epAttribs );
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// USBTRACE("\r\nEpout:");
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// USBTRACE2("\r\nAddr: ", epInfo[epDataOutIndex].epAddr );
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// USBTRACE2("\r\nMax.pkt.size: ", epInfo[epDataOutIndex].maxPktSize );
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// USBTRACE2("\r\nAttr: ", epInfo[epDataOutIndex].epAttribs );
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// USBTRACE("\r\nEpin:");
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// USBTRACE2("\r\nAddr: ", epInfo[epDataInIndex].epAddr );
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// USBTRACE2("\r\nMax.pkt.size: ", epInfo[epDataInIndex].maxPktSize );
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// USBTRACE2("\r\nAttr: ", epInfo[epDataInIndex].epAttribs );
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USBTRACE("\r\nConfiguration successful");
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ready = true;
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return 0; //successful configuration
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}//if( buf->idVendor == ADK_VID...
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delay(20); //testing compatibility w/Motorola Xoom
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//probe device - get accessory protocol revision
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{
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uint16_t adkproto = -1;
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rcode = getProto((uint8_t*)&adkproto );
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if( rcode ){
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goto FailGetProto; //init fails
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}
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USBTRACE2("\r\nADK protocol rev. ", adkproto );
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}
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//sending ID strings
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sendStr( ACCESSORY_STRING_MANUFACTURER, manufacturer);
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sendStr( ACCESSORY_STRING_MODEL, model);
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sendStr( ACCESSORY_STRING_DESCRIPTION, description);
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sendStr( ACCESSORY_STRING_VERSION, version);
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sendStr( ACCESSORY_STRING_URI, uri);
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sendStr( ACCESSORY_STRING_SERIAL, serial);
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//switch to accessory mode
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//the Android phone will reset
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rcode = switchAcc();
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if( rcode ) {
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goto FailSwAcc; //init fails
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}
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rcode = -1;
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goto SwAttempt; //switch to accessory mode attempted
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/* diagnostic messages */
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FailGetDevDescr:
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USBTRACE("\r\ngetDevDescr:");
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goto Fail;
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FailSetDevTblEntry:
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USBTRACE("\r\nsetDevTblEn:");
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goto Fail;
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FailGetProto:
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USBTRACE("\r\ngetProto:");
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goto Fail;
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FailSwAcc:
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USBTRACE("\r\nswAcc:");
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goto Fail;
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SwAttempt:
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USBTRACE("\r\nAccessory mode switch attempt");
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goto Fail;
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FailGetConfDescr:
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// USBTRACE("getConf:");
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goto Fail;
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//
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FailSetConf:
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// USBTRACE("setConf:");
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goto Fail;
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//
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//FailOnInit:
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// USBTRACE("OnInit:");
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// goto Fail;
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//
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Fail:
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//USBTRACE2("\r\nADK Init Failed, error code: ", rcode);
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Release();
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return rcode;
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}
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/* Extracts bulk-IN and bulk-OUT endpoint information from config descriptor */
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void ADK::EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *pep)
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{
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//ErrorMessage<uint8_t>(PSTR("Conf.Val"), conf);
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//ErrorMessage<uint8_t>(PSTR("Iface Num"),iface);
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//ErrorMessage<uint8_t>(PSTR("Alt.Set"), alt);
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//added by Yuuichi Akagawa
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if( bNumEP == 3 ) {
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return;
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}
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bConfNum = conf;
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uint8_t index;
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if ((pep->bmAttributes & 0x02) == 2) {
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index = ((pep->bEndpointAddress & 0x80) == 0x80) ? epDataInIndex : epDataOutIndex;
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}
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// Fill in the endpoint info structure
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epInfo[index].epAddr = (pep->bEndpointAddress & 0x0F);
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epInfo[index].maxPktSize = (uint8_t)pep->wMaxPacketSize;
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bNumEP ++;
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//PrintEndpointDescriptor(pep);
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}
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/* Performs a cleanup after failed Init() attempt */
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uint8_t ADK::Release()
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{
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pUsb->GetAddressPool().FreeAddress(bAddress);
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bNumEP = 1; //must have to be reset to 1
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bAddress = 0;
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ready = false;
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return 0;
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}
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uint8_t ADK::RcvData(uint16_t *bytes_rcvd, uint8_t *dataptr)
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{
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//USBTRACE2("\r\nAddr: ", bAddress );
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//USBTRACE2("\r\nEP: ",epInfo[epDataInIndex].epAddr);
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return pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
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}
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uint8_t ADK::SndData(uint16_t nbytes, uint8_t *dataptr)
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{
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return pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, nbytes, dataptr);
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}
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void ADK::PrintEndpointDescriptor( const USB_ENDPOINT_DESCRIPTOR* ep_ptr )
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{
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Notify(PSTR("Endpoint descriptor:"));
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Notify(PSTR("\r\nLength:\t\t"));
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PrintHex<uint8_t>(ep_ptr->bLength);
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Notify(PSTR("\r\nType:\t\t"));
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PrintHex<uint8_t>(ep_ptr->bDescriptorType);
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Notify(PSTR("\r\nAddress:\t"));
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PrintHex<uint8_t>(ep_ptr->bEndpointAddress);
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Notify(PSTR("\r\nAttributes:\t"));
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PrintHex<uint8_t>(ep_ptr->bmAttributes);
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Notify(PSTR("\r\nMaxPktSize:\t"));
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PrintHex<uint16_t>(ep_ptr->wMaxPacketSize);
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Notify(PSTR("\r\nPoll Intrv:\t"));
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PrintHex<uint8_t>(ep_ptr->bInterval);
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Notify(PSTR("\r\n"));
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}
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