/* 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(_usb_h_) || defined(USBCORE_H)
#error "Never include UsbCore.h directly; include Usb.h instead"
#else
#define USBCORE_H

// Not used anymore? If anyone uses this, please let us know so that this may be
// moved to the proper place, settings.h.
//#define USB_METHODS_INLINE

/* shield pins. First parameter - SS pin, second parameter - INT pin */
#ifdef BOARD_BLACK_WIDDOW
typedef MAX3421e<P6, P3> MAX3421E; // Black Widow
#elif defined(CORE_TEENSY) && (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__))
#if EXT_RAM
typedef MAX3421e<P20, P7> MAX3421E; // Teensy++ 2.0 with XMEM2
#else
typedef MAX3421e<P9, P8> MAX3421E; // Teensy++ 1.0 and 2.0
#endif
#elif defined(BOARD_MEGA_ADK)
typedef MAX3421e<P53, P54> MAX3421E; // Arduino Mega ADK
#elif defined(ARDUINO_AVR_BALANDUINO)
typedef MAX3421e<P20, P19> MAX3421E; // Balanduino
#elif defined(__ARDUINO_X86__) && PLATFORM_ID == 0x06
typedef MAX3421e<P3, P2> MAX3421E; // The Intel Galileo supports much faster read and write speed at pin 2 and 3
#elif defined(ESP8266)
typedef MAX3421e<P15, P5> MAX3421E; // ESP8266 boards
#elif defined(ESP32)
typedef MAX3421e<P5, P17> MAX3421E; // ESP32 boards
#else
typedef MAX3421e<P10, P9> MAX3421E; // Official Arduinos (UNO, Duemilanove, Mega, 2560, Leonardo, Due etc.), Intel Edison, Intel Galileo 2 or Teensy 2.0 and 3.x
#endif

/* Common setup data constant combinations  */
#define bmREQ_GET_DESCR     USB_SETUP_DEVICE_TO_HOST|USB_SETUP_TYPE_STANDARD|USB_SETUP_RECIPIENT_DEVICE     //get descriptor request type
#define bmREQ_SET           USB_SETUP_HOST_TO_DEVICE|USB_SETUP_TYPE_STANDARD|USB_SETUP_RECIPIENT_DEVICE     //set request type for all but 'set feature' and 'set interface'
#define bmREQ_CL_GET_INTF   USB_SETUP_DEVICE_TO_HOST|USB_SETUP_TYPE_CLASS|USB_SETUP_RECIPIENT_INTERFACE     //get interface request type

// D7           data transfer direction (0 - host-to-device, 1 - device-to-host)
// D6-5         Type (0- standard, 1 - class, 2 - vendor, 3 - reserved)
// D4-0         Recipient (0 - device, 1 - interface, 2 - endpoint, 3 - other, 4..31 - reserved)

// USB Device Classes
#define USB_CLASS_USE_CLASS_INFO        0x00    // Use Class Info in the Interface Descriptors
#define USB_CLASS_AUDIO                 0x01    // Audio
#define USB_CLASS_COM_AND_CDC_CTRL      0x02    // Communications and CDC Control
#define USB_CLASS_HID                   0x03    // HID
#define USB_CLASS_PHYSICAL              0x05    // Physical
#define USB_CLASS_IMAGE                 0x06    // Image
#define USB_CLASS_PRINTER               0x07    // Printer
#define USB_CLASS_MASS_STORAGE          0x08    // Mass Storage
#define USB_CLASS_HUB                   0x09    // Hub
#define USB_CLASS_CDC_DATA              0x0a    // CDC-Data
#define USB_CLASS_SMART_CARD            0x0b    // Smart-Card
#define USB_CLASS_CONTENT_SECURITY      0x0d    // Content Security
#define USB_CLASS_VIDEO                 0x0e    // Video
#define USB_CLASS_PERSONAL_HEALTH       0x0f    // Personal Healthcare
#define USB_CLASS_DIAGNOSTIC_DEVICE     0xdc    // Diagnostic Device
#define USB_CLASS_WIRELESS_CTRL         0xe0    // Wireless Controller
#define USB_CLASS_MISC                  0xef    // Miscellaneous
#define USB_CLASS_APP_SPECIFIC          0xfe    // Application Specific
#define USB_CLASS_VENDOR_SPECIFIC       0xff    // Vendor Specific

// Additional Error Codes
#define USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED       0xD1
#define USB_DEV_CONFIG_ERROR_DEVICE_INIT_INCOMPLETE     0xD2
#define USB_ERROR_UNABLE_TO_REGISTER_DEVICE_CLASS       0xD3
#define USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL          0xD4
#define USB_ERROR_HUB_ADDRESS_OVERFLOW                  0xD5
#define USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL             0xD6
#define USB_ERROR_EPINFO_IS_NULL                        0xD7
#define USB_ERROR_INVALID_ARGUMENT                      0xD8
#define USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE         0xD9
#define USB_ERROR_INVALID_MAX_PKT_SIZE                  0xDA
#define USB_ERROR_EP_NOT_FOUND_IN_TBL                   0xDB
#define USB_ERROR_CONFIG_REQUIRES_ADDITIONAL_RESET      0xE0
#define USB_ERROR_FailGetDevDescr                       0xE1
#define USB_ERROR_FailSetDevTblEntry                    0xE2
#define USB_ERROR_FailGetConfDescr                      0xE3
#define USB_ERROR_TRANSFER_TIMEOUT                      0xFF

#define USB_XFER_TIMEOUT        5000    // (5000) USB transfer timeout in milliseconds, per section 9.2.6.1 of USB 2.0 spec
//#define USB_NAK_LIMIT         32000   // NAK limit for a transfer. 0 means NAKs are not counted
#define USB_RETRY_LIMIT         3       // 3 retry limit for a transfer
#define USB_SETTLE_DELAY        200     // settle delay in milliseconds

#define USB_NUMDEVICES          16      //number of USB devices
//#define HUB_MAX_HUBS          7       // maximum number of hubs that can be attached to the host controller
#define HUB_PORT_RESET_DELAY    20      // hub port reset delay 10 ms recomended, can be up to 20 ms

/* USB state machine states */
#define USB_STATE_MASK                                      0xf0

#define USB_STATE_DETACHED                                  0x10
#define USB_DETACHED_SUBSTATE_INITIALIZE                    0x11
#define USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE               0x12
#define USB_DETACHED_SUBSTATE_ILLEGAL                       0x13
#define USB_ATTACHED_SUBSTATE_SETTLE                        0x20
#define USB_ATTACHED_SUBSTATE_RESET_DEVICE                  0x30
#define USB_ATTACHED_SUBSTATE_WAIT_RESET_COMPLETE           0x40
#define USB_ATTACHED_SUBSTATE_WAIT_SOF                      0x50
#define USB_ATTACHED_SUBSTATE_WAIT_RESET                    0x51
#define USB_ATTACHED_SUBSTATE_GET_DEVICE_DESCRIPTOR_SIZE    0x60
#define USB_STATE_ADDRESSING                                0x70
#define USB_STATE_CONFIGURING                               0x80
#define USB_STATE_RUNNING                                   0x90
#define USB_STATE_ERROR                                     0xa0

class USBDeviceConfig {
public:

        virtual uint8_t Init(uint8_t parent __attribute__((unused)), uint8_t port __attribute__((unused)), bool lowspeed __attribute__((unused))) {
                return 0;
        }

        virtual uint8_t ConfigureDevice(uint8_t parent __attribute__((unused)), uint8_t port __attribute__((unused)), bool lowspeed __attribute__((unused))) {
                return 0;
        }

        virtual uint8_t Release() {
                return 0;
        }

        virtual uint8_t Poll() {
                return 0;
        }

        virtual uint8_t GetAddress() {
                return 0;
        }

        virtual void ResetHubPort(uint8_t port __attribute__((unused))) {
                return;
        } // Note used for hubs only!

        virtual bool VIDPIDOK(uint16_t vid __attribute__((unused)), uint16_t pid __attribute__((unused))) {
                return false;
        }

        virtual bool DEVCLASSOK(uint8_t klass __attribute__((unused))) {
                return false;
        }

        virtual bool DEVSUBCLASSOK(uint8_t subklass __attribute__((unused))) {
                return true;
        }

};

/* USB Setup Packet Structure   */
typedef struct {

        union { // offset   description
                uint8_t bmRequestType; //   0      Bit-map of request type

                struct {
                        uint8_t recipient : 5; //          Recipient of the request
                        uint8_t type : 2; //          Type of request
                        uint8_t direction : 1; //          Direction of data X-fer
                } __attribute__((packed));
        } ReqType_u;
        uint8_t bRequest; //   1      Request

        union {
                uint16_t wValue; //   2      Depends on bRequest

                struct {
                        uint8_t wValueLo;
                        uint8_t wValueHi;
                } __attribute__((packed));
        } wVal_u;
        uint16_t wIndex; //   4      Depends on bRequest
        uint16_t wLength; //   6      Depends on bRequest
} __attribute__((packed)) SETUP_PKT, *PSETUP_PKT;



// Base class for incoming data parser

class USBReadParser {
public:
        virtual void Parse(const uint16_t len, const uint8_t *pbuf, const uint16_t &offset) = 0;
};

class USB : public MAX3421E {
        AddressPoolImpl<USB_NUMDEVICES> addrPool;
        USBDeviceConfig* devConfig[USB_NUMDEVICES];
        uint8_t bmHubPre;

public:
        USB(void);

        void SetHubPreMask() {
                bmHubPre |= bmHUBPRE;
        };

        void ResetHubPreMask() {
                bmHubPre &= (~bmHUBPRE);
        };

        AddressPool& GetAddressPool() {
                return (AddressPool&)addrPool;
        };

        uint8_t RegisterDeviceClass(USBDeviceConfig *pdev) {
                for(uint8_t i = 0; i < USB_NUMDEVICES; i++) {
                        if(!devConfig[i]) {
                                devConfig[i] = pdev;
                                return 0;
                        }
                }
                return USB_ERROR_UNABLE_TO_REGISTER_DEVICE_CLASS;
        };

        void ForEachUsbDevice(UsbDeviceHandleFunc pfunc) {
                addrPool.ForEachUsbDevice(pfunc);
        };
        uint8_t getUsbTaskState(void);
        void setUsbTaskState(uint8_t state);

        EpInfo* getEpInfoEntry(uint8_t addr, uint8_t ep);
        uint8_t setEpInfoEntry(uint8_t addr, uint8_t epcount, EpInfo* eprecord_ptr);

        /* Control requests */
        uint8_t getDevDescr(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* dataptr);
        uint8_t getConfDescr(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t conf, uint8_t* dataptr);

        uint8_t getConfDescr(uint8_t addr, uint8_t ep, uint8_t conf, USBReadParser *p);

        uint8_t getStrDescr(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t index, uint16_t langid, uint8_t* dataptr);
        uint8_t setAddr(uint8_t oldaddr, uint8_t ep, uint8_t newaddr);
        uint8_t setConf(uint8_t addr, uint8_t ep, uint8_t conf_value);
        /**/
        uint8_t ctrlData(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* dataptr, bool direction);
        uint8_t ctrlStatus(uint8_t ep, bool direction, uint16_t nak_limit);
        uint8_t inTransfer(uint8_t addr, uint8_t ep, uint16_t *nbytesptr, uint8_t* data, uint8_t bInterval = 0);
        uint8_t outTransfer(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* data);
        uint8_t dispatchPkt(uint8_t token, uint8_t ep, uint16_t nak_limit);

        void Task(void);

        uint8_t DefaultAddressing(uint8_t parent, uint8_t port, bool lowspeed);
        uint8_t Configuring(uint8_t parent, uint8_t port, bool lowspeed);
        uint8_t ReleaseDevice(uint8_t addr);

        uint8_t ctrlReq(uint8_t addr, uint8_t ep, uint8_t bmReqType, uint8_t bRequest, uint8_t wValLo, uint8_t wValHi,
                uint16_t wInd, uint16_t total, uint16_t nbytes, uint8_t* dataptr, USBReadParser *p);

private:
        void init();
        uint8_t SetAddress(uint8_t addr, uint8_t ep, EpInfo **ppep, uint16_t *nak_limit);
        uint8_t OutTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t nbytes, uint8_t *data);
        uint8_t InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t *data, uint8_t bInterval = 0);
        uint8_t AttemptConfig(uint8_t driver, uint8_t parent, uint8_t port, bool lowspeed);
};

#if 0 //defined(USB_METHODS_INLINE)
//get device descriptor

inline uint8_t USB::getDevDescr(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* dataptr) {
        return ( ctrlReq(addr, ep, bmREQ_GET_DESCR, USB_REQUEST_GET_DESCRIPTOR, 0x00, USB_DESCRIPTOR_DEVICE, 0x0000, nbytes, dataptr));
}
//get configuration descriptor

inline uint8_t USB::getConfDescr(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t conf, uint8_t* dataptr) {
        return ( ctrlReq(addr, ep, bmREQ_GET_DESCR, USB_REQUEST_GET_DESCRIPTOR, conf, USB_DESCRIPTOR_CONFIGURATION, 0x0000, nbytes, dataptr));
}
//get string descriptor

inline uint8_t USB::getStrDescr(uint8_t addr, uint8_t ep, uint16_t nuint8_ts, uint8_t index, uint16_t langid, uint8_t* dataptr) {
        return ( ctrlReq(addr, ep, bmREQ_GET_DESCR, USB_REQUEST_GET_DESCRIPTOR, index, USB_DESCRIPTOR_STRING, langid, nuint8_ts, dataptr));
}
//set address

inline uint8_t USB::setAddr(uint8_t oldaddr, uint8_t ep, uint8_t newaddr) {
        return ( ctrlReq(oldaddr, ep, bmREQ_SET, USB_REQUEST_SET_ADDRESS, newaddr, 0x00, 0x0000, 0x0000, NULL));
}
//set configuration

inline uint8_t USB::setConf(uint8_t addr, uint8_t ep, uint8_t conf_value) {
        return ( ctrlReq(addr, ep, bmREQ_SET, USB_REQUEST_SET_CONFIGURATION, conf_value, 0x00, 0x0000, 0x0000, NULL));
}

#endif // defined(USB_METHODS_INLINE)

#endif /* USBCORE_H */
