hidboot.h

/* 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
 */
#if !defined(__HIDBOOT_H__)
#define __HIDBOOT_H__

#include "usbhid.h"

#define UHS_HID_BOOT_KEY_ZERO           0x27
#define UHS_HID_BOOT_KEY_ENTER          0x28
#define UHS_HID_BOOT_KEY_SPACE          0x2c
#define UHS_HID_BOOT_KEY_CAPS_LOCK      0x39
#define UHS_HID_BOOT_KEY_SCROLL_LOCK    0x47
#define UHS_HID_BOOT_KEY_NUM_LOCK       0x53
#define UHS_HID_BOOT_KEY_ZERO2          0x62
#define UHS_HID_BOOT_KEY_PERIOD         0x63

// Don't worry, GCC will optimize the result to a final value.
#define bitsEndpoints(p) ((((p) & USB_HID_PROTOCOL_KEYBOARD)? 2 : 0) | (((p) & USB_HID_PROTOCOL_MOUSE)? 1 : 0))
#define totalEndpoints(p) ((bitsEndpoints(p) == 3) ? 3 : 2)
#define epMUL(p) ((((p) & USB_HID_PROTOCOL_KEYBOARD)? 1 : 0) + (((p) & USB_HID_PROTOCOL_MOUSE)? 1 : 0))

// Already defined in hid.h
// #define HID_MAX_HID_CLASS_DESCRIPTORS 5

struct MOUSEINFO {

        struct {
                uint8_t bmLeftButton : 1;
                uint8_t bmRightButton : 1;
                uint8_t bmMiddleButton : 1;
                uint8_t bmDummy : 5;
        };
        int8_t dX;
        int8_t dY;
};

class MouseReportParser : public HIDReportParser {

        union {
                MOUSEINFO mouseInfo;
                uint8_t bInfo[sizeof (MOUSEINFO)];
        } prevState;

public:
        void Parse(USBHID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf);

protected:

        virtual void OnMouseMove(MOUSEINFO *mi __attribute__((unused))) {
        };

        virtual void OnLeftButtonUp(MOUSEINFO *mi __attribute__((unused))) {
        };

        virtual void OnLeftButtonDown(MOUSEINFO *mi __attribute__((unused))) {
        };

        virtual void OnRightButtonUp(MOUSEINFO *mi __attribute__((unused))) {
        };

        virtual void OnRightButtonDown(MOUSEINFO *mi __attribute__((unused))) {
        };

        virtual void OnMiddleButtonUp(MOUSEINFO *mi __attribute__((unused))) {
        };

        virtual void OnMiddleButtonDown(MOUSEINFO *mi __attribute__((unused))) {
        };
};

struct MODIFIERKEYS {
        uint8_t bmLeftCtrl : 1;
        uint8_t bmLeftShift : 1;
        uint8_t bmLeftAlt : 1;
        uint8_t bmLeftGUI : 1;
        uint8_t bmRightCtrl : 1;
        uint8_t bmRightShift : 1;
        uint8_t bmRightAlt : 1;
        uint8_t bmRightGUI : 1;
};

struct KBDINFO {

        struct {
                uint8_t bmLeftCtrl : 1;
                uint8_t bmLeftShift : 1;
                uint8_t bmLeftAlt : 1;
                uint8_t bmLeftGUI : 1;
                uint8_t bmRightCtrl : 1;
                uint8_t bmRightShift : 1;
                uint8_t bmRightAlt : 1;
                uint8_t bmRightGUI : 1;
        };
        uint8_t bReserved;
        uint8_t Keys[6];
};

struct KBDLEDS {
        uint8_t bmNumLock : 1;
        uint8_t bmCapsLock : 1;
        uint8_t bmScrollLock : 1;
        uint8_t bmCompose : 1;
        uint8_t bmKana : 1;
        uint8_t bmReserved : 3;
};

class KeyboardReportParser : public HIDReportParser {
        static const uint8_t numKeys[10];
        static const uint8_t symKeysUp[12];
        static const uint8_t symKeysLo[12];
        static const uint8_t padKeys[5];

protected:

        union {
                KBDINFO kbdInfo;
                uint8_t bInfo[sizeof (KBDINFO)];
        } prevState;

        union {
                KBDLEDS kbdLeds;
                uint8_t bLeds;
        } kbdLockingKeys;

        uint8_t OemToAscii(uint8_t mod, uint8_t key);

public:

        KeyboardReportParser() {
                kbdLockingKeys.bLeds = 0;
        };

        void Parse(USBHID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf);

protected:

        virtual uint8_t HandleLockingKeys(USBHID* hid, uint8_t key) {
                uint8_t old_keys = kbdLockingKeys.bLeds;

                switch(key) {
                        case UHS_HID_BOOT_KEY_NUM_LOCK:
                                kbdLockingKeys.kbdLeds.bmNumLock = ~kbdLockingKeys.kbdLeds.bmNumLock;
                                break;
                        case UHS_HID_BOOT_KEY_CAPS_LOCK:
                                kbdLockingKeys.kbdLeds.bmCapsLock = ~kbdLockingKeys.kbdLeds.bmCapsLock;
                                break;
                        case UHS_HID_BOOT_KEY_SCROLL_LOCK:
                                kbdLockingKeys.kbdLeds.bmScrollLock = ~kbdLockingKeys.kbdLeds.bmScrollLock;
                                break;
                }

                if(old_keys != kbdLockingKeys.bLeds && hid) {
                        uint8_t lockLeds = kbdLockingKeys.bLeds;
                        return (hid->SetReport(0, 0/*hid->GetIface()*/, 2, 0, 1, &lockLeds));
                }

                return 0;
        };

        virtual void OnControlKeysChanged(uint8_t before __attribute__((unused)), uint8_t after __attribute__((unused))) {
        };

        virtual void OnKeyDown(uint8_t mod __attribute__((unused)), uint8_t key __attribute__((unused))) {
        };

        virtual void OnKeyUp(uint8_t mod __attribute__((unused)), uint8_t key __attribute__((unused))) {
        };

        virtual const uint8_t *getNumKeys() {
                return numKeys;
        };

        virtual const uint8_t *getSymKeysUp() {
                return symKeysUp;
        };

        virtual const uint8_t *getSymKeysLo() {
                return symKeysLo;
        };

        virtual const uint8_t *getPadKeys() {
                return padKeys;
        };
};

template <const uint8_t BOOT_PROTOCOL>
class HIDBoot : public USBHID //public USBDeviceConfig, public UsbConfigXtracter
{
        EpInfo epInfo[totalEndpoints(BOOT_PROTOCOL)];
        HIDReportParser *pRptParser[epMUL(BOOT_PROTOCOL)];

        uint8_t bConfNum; // configuration number
        uint8_t bIfaceNum; // Interface Number
        uint8_t bNumIface; // number of interfaces in the configuration
        uint8_t bNumEP; // total number of EP in the configuration
        uint32_t qNextPollTime; // next poll time
        bool bPollEnable; // poll enable flag
        uint8_t bInterval; // largest interval
        bool bRptProtoEnable; // Report Protocol enable flag

        void Initialize();

        virtual HIDReportParser* GetReportParser(uint8_t id) {
                return pRptParser[id];
        };

public:
        HIDBoot(USB *p, bool bRptProtoEnable = false);

        virtual bool SetReportParser(uint8_t id, HIDReportParser *prs) {
                pRptParser[id] = prs;
                return true;
        };

        // USBDeviceConfig implementation
        uint8_t Init(uint8_t parent, uint8_t port, bool lowspeed);
        uint8_t Release();
        uint8_t Poll();

        virtual uint8_t GetAddress() {
                return bAddress;
        };

        virtual bool isReady() {
                return bPollEnable;
        };

        // UsbConfigXtracter implementation
        // Method should be defined here if virtual.
        virtual void EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *ep);

        virtual bool DEVCLASSOK(uint8_t klass) {
                return (klass == USB_CLASS_HID);
        }

        virtual bool DEVSUBCLASSOK(uint8_t subklass) {
                return (subklass == BOOT_PROTOCOL);
        }
};

template <const uint8_t BOOT_PROTOCOL>
HIDBoot<BOOT_PROTOCOL>::HIDBoot(USB *p, bool bRptProtoEnable/* = false*/) :
USBHID(p),
qNextPollTime(0),
bPollEnable(false),
bRptProtoEnable(bRptProtoEnable) {
        Initialize();

        for(int i = 0; i < epMUL(BOOT_PROTOCOL); i++) {
                pRptParser[i] = NULL;
        }
        if(pUsb)
                pUsb->RegisterDeviceClass(this);
}

template <const uint8_t BOOT_PROTOCOL>
void HIDBoot<BOOT_PROTOCOL>::Initialize() {
        for(int i = 0; i < totalEndpoints(BOOT_PROTOCOL); 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;
}

template <const uint8_t BOOT_PROTOCOL>
uint8_t HIDBoot<BOOT_PROTOCOL>::Init(uint8_t parent, uint8_t port, bool lowspeed) {
        const uint8_t constBufSize = sizeof (USB_DEVICE_DESCRIPTOR);

        uint8_t buf[constBufSize];
        USB_DEVICE_DESCRIPTOR* device;
        uint8_t rcode;
        UsbDevice *p = NULL;
        EpInfo *oldep_ptr = NULL;
        uint8_t len = 0;
        //uint16_t cd_len = 0;

        uint8_t num_of_conf; // number of configurations
        //uint8_t num_of_intf; // number of interfaces

        AddressPool &addrPool = pUsb->GetAddressPool();

        USBTRACE("BM Init\r\n");
        //USBTRACE2("totalEndpoints:", (uint8_t) (totalEndpoints(BOOT_PROTOCOL)));
        //USBTRACE2("epMUL:", epMUL(BOOT_PROTOCOL));

        if(bAddress)
                return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;

        bInterval = 0;
        // 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];

        device = reinterpret_cast<USB_DEVICE_DESCRIPTOR*>(buf);

        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 = (uint8_t)(device->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;

        num_of_conf = device->bNumConfigurations;

        USBTRACE2("NC:", num_of_conf);

        // GCC will optimize unused stuff away.
        if((BOOT_PROTOCOL & (USB_HID_PROTOCOL_KEYBOARD | USB_HID_PROTOCOL_MOUSE)) == (USB_HID_PROTOCOL_KEYBOARD | USB_HID_PROTOCOL_MOUSE)) {
                USBTRACE("HID_PROTOCOL_KEYBOARD AND MOUSE\r\n");
                ConfigDescParser<
                        USB_CLASS_HID,
                        HID_BOOT_INTF_SUBCLASS,
                        USB_HID_PROTOCOL_KEYBOARD | USB_HID_PROTOCOL_MOUSE,
                        CP_MASK_COMPARE_ALL > confDescrParser(this);
                confDescrParser.SetOR(); // Use the OR variant.
                for(uint8_t i = 0; i < num_of_conf; i++) {
                        pUsb->getConfDescr(bAddress, 0, i, &confDescrParser);
                        if(bNumEP == (uint8_t)(totalEndpoints(BOOT_PROTOCOL)))
                                break;
                }
        } else {
                // GCC will optimize unused stuff away.
                if(BOOT_PROTOCOL & USB_HID_PROTOCOL_KEYBOARD) {
                        USBTRACE("HID_PROTOCOL_KEYBOARD\r\n");
                        for(uint8_t i = 0; i < num_of_conf; i++) {
                                ConfigDescParser<
                                        USB_CLASS_HID,
                                        HID_BOOT_INTF_SUBCLASS,
                                        USB_HID_PROTOCOL_KEYBOARD,
                                        CP_MASK_COMPARE_ALL> confDescrParserA(this);

                                pUsb->getConfDescr(bAddress, 0, i, &confDescrParserA);
                                if(bNumEP == (uint8_t)(totalEndpoints(BOOT_PROTOCOL)))
                                        break;
                        }
                }

                // GCC will optimize unused stuff away.
                if(BOOT_PROTOCOL & USB_HID_PROTOCOL_MOUSE) {
                        USBTRACE("HID_PROTOCOL_MOUSE\r\n");
                        for(uint8_t i = 0; i < num_of_conf; i++) {
                                ConfigDescParser<
                                        USB_CLASS_HID,
                                        HID_BOOT_INTF_SUBCLASS,
                                        USB_HID_PROTOCOL_MOUSE,
                                        CP_MASK_COMPARE_ALL> confDescrParserB(this);

                                pUsb->getConfDescr(bAddress, 0, i, &confDescrParserB);
                                if(bNumEP == ((uint8_t)(totalEndpoints(BOOT_PROTOCOL))))
                                        break;

                        }
                }
        }
        USBTRACE2("bNumEP:", bNumEP);

        if(bNumEP != (uint8_t)(totalEndpoints(BOOT_PROTOCOL))) {
                rcode = USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;
                goto Fail;
        }

        // Assign epInfo to epinfo pointer
        rcode = pUsb->setEpInfoEntry(bAddress, bNumEP, epInfo);
        //USBTRACE2("setEpInfoEntry returned ", rcode);
        USBTRACE2("Cnf:", bConfNum);

        delay(1000);

        // Set Configuration Value
        rcode = pUsb->setConf(bAddress, 0, bConfNum);

        if(rcode)
                goto FailSetConfDescr;

        delay(1000);

        USBTRACE2("bIfaceNum:", bIfaceNum);
        USBTRACE2("bNumIface:", bNumIface);

        // Yes, mouse wants SetProtocol and SetIdle too!
        for(uint8_t i = 0; i < epMUL(BOOT_PROTOCOL); i++) {
                USBTRACE2("\r\nInterface:", i);
                rcode = SetProtocol(i, bRptProtoEnable ? HID_RPT_PROTOCOL : USB_HID_BOOT_PROTOCOL);
                if(rcode) goto FailSetProtocol;
                USBTRACE2("PROTOCOL SET HID_BOOT rcode:", rcode);
                rcode = SetIdle(i, 0, 0);
                USBTRACE2("SET_IDLE rcode:", rcode);
                // if(rcode) goto FailSetIdle; This can fail.
                // Get the RPIPE and just throw it away.
                SinkParser<USBReadParser, uint16_t, uint16_t> sink;
                rcode = GetReportDescr(i, &sink);
                USBTRACE2("RPIPE rcode:", rcode);
        }

        // Get RPIPE and throw it away.

        if(BOOT_PROTOCOL & USB_HID_PROTOCOL_KEYBOARD) {
                // Wake keyboard interface by twinkling up to 5 LEDs that are in the spec.
                // kana, compose, scroll, caps, num
                rcode = 0x20; // Reuse rcode.
                while(rcode) {
                        rcode >>= 1;
                        // Ignore any error returned, we don't care if LED is not supported
                        SetReport(0, 0, 2, 0, 1, &rcode); // Eventually becomes zero (All off)
                        delay(25);
                }
        }
        USBTRACE("BM configured\r\n");

        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

FailSetProtocol:
#ifdef DEBUG_USB_HOST
        USBTRACE("SetProto:");
        goto Fail;
#endif

        //FailSetIdle:
        //#ifdef DEBUG_USB_HOST
        //        USBTRACE("SetIdle:");
        //#endif

Fail:
#ifdef DEBUG_USB_HOST
        NotifyFail(rcode);
#endif
        Release();

        return rcode;
}

template <const uint8_t BOOT_PROTOCOL>
void HIDBoot<BOOT_PROTOCOL>::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 considered.
        //if(bNumEP > 1 && conf != bConfNum)
        if(bNumEP == totalEndpoints(BOOT_PROTOCOL))
                return;

        bConfNum = conf;
        bIfaceNum = iface;

        if((pep->bmAttributes & bmUSB_TRANSFER_TYPE) == USB_TRANSFER_TYPE_INTERRUPT && (pep->bEndpointAddress & 0x80) == 0x80) {
                if(pep->bInterval > bInterval) bInterval = pep->bInterval;

                // 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;
                bNumEP++;

        }
}

template <const uint8_t BOOT_PROTOCOL>
uint8_t HIDBoot<BOOT_PROTOCOL>::Release() {
        pUsb->GetAddressPool().FreeAddress(bAddress);

        bConfNum = 0;
        bIfaceNum = 0;
        bNumEP = 1;
        bAddress = 0;
        qNextPollTime = 0;
        bPollEnable = false;

        return 0;
}

template <const uint8_t BOOT_PROTOCOL>
uint8_t HIDBoot<BOOT_PROTOCOL>::Poll() {
        uint8_t rcode = 0;

        if(bPollEnable && ((int32_t)((uint32_t)millis() - qNextPollTime) >= 0L)) {

                // To-do: optimize manually, using the for loop only if needed.
                for(int i = 0; i < epMUL(BOOT_PROTOCOL); i++) {
                        const uint16_t const_buff_len = 16;
                        uint8_t buf[const_buff_len];

                        USBTRACE3("(hidboot.h) i=", i, 0x81);
                        USBTRACE3("(hidboot.h) epInfo[epInterruptInIndex + i].epAddr=", epInfo[epInterruptInIndex + i].epAddr, 0x81);
                        USBTRACE3("(hidboot.h) epInfo[epInterruptInIndex + i].maxPktSize=", epInfo[epInterruptInIndex + i].maxPktSize, 0x81);
                        uint16_t read = (uint16_t)epInfo[epInterruptInIndex + i].maxPktSize;

                        rcode = pUsb->inTransfer(bAddress, epInfo[epInterruptInIndex + i].epAddr, &read, buf);
                        // SOME buggy dongles report extra keys (like sleep) using a 2 byte packet on the wrong endpoint.
                        // Since keyboard and mice must report at least 3 bytes, we ignore the extra data.
                        if(!rcode && read > 2) {
                                if(pRptParser[i])
                                        pRptParser[i]->Parse((USBHID*)this, 0, (uint8_t)read, buf);
#ifdef DEBUG_USB_HOST
                                // We really don't care about errors and anomalies unless we are debugging.
                        } else {
                                if(rcode != hrNAK) {
                                        USBTRACE3("(hidboot.h) Poll:", rcode, 0x81);
                                }
                                if(!rcode && read) {
                                        USBTRACE3("(hidboot.h) Strange read count: ", read, 0x80);
                                        USBTRACE3("(hidboot.h) Interface:", i, 0x80);
                                }
                        }

                        if(!rcode && read && (UsbDEBUGlvl > 0x7f)) {
                                for(uint8_t i = 0; i < read; i++) {
                                        PrintHex<uint8_t > (buf[i], 0x80);
                                        USBTRACE1(" ", 0x80);
                                }
                                if(read)
                                        USBTRACE1("\r\n", 0x80);
#endif
                        }

                }
                qNextPollTime = (uint32_t)millis() + bInterval;
        }
        return rcode;
}

#endif // __HIDBOOTMOUSE_H__