Diff: USB_Host/adk.cpp

Revision:

0:b1ce54272580

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USB_Host/adk.cpp	Sat Jan 18 15:06:35 2020 +0000
@@ -0,0 +1,373 @@
+/* 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);
+}
+