/**
 *   libztex.h - headers for Ztex 1.15x fpga board support library
 *
 *   Copyright (c) 2012 nelisky.btc@gmail.com
 *
 *   This work is based upon the Java SDK provided by ztex which is
 *   Copyright (C) 2009-2011 ZTEX GmbH.
 *   http://www.ztex.de
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2 as
 *   published by the Free Software Foundation.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *   General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, see http://www.gnu.org/licenses/.
**/
#ifndef __LIBZTEX_H__
#define __LIBZTEX_H__

#include <libusb-1.0/libusb.h>

#define LIBZTEX_MAX_DESCRIPTORS 512
#define LIBZTEX_SNSTRING_LEN 10

#define LIBZTEX_IDVENDOR 0x221A
#define LIBZTEX_IDPRODUCT 0x0100

#define LIBZTEX_MAXMAXERRORRATE 0.05
#define LIBZTEX_ERRORHYSTERESIS 0.1
#define LIBZTEX_OVERHEATTHRESHOLD 0.5

struct libztex_fpgastate {
  bool fpgaConfigured;
  unsigned char fpgaChecksum;
  uint16_t fpgaBytes;
  unsigned char fpgaInitB;
  unsigned char fpgaFlashResult;
  bool fpgaFlashBitSwap;
};

struct libztex_device {
  bool valid;
  struct libusb_device_descriptor descriptor;
  libusb_device_handle *hndl; 
  unsigned char usbbus;
  unsigned char usbaddress;
  unsigned char snString[LIBZTEX_SNSTRING_LEN+1];
  unsigned char productId[4];
  unsigned char fwVersion;
  unsigned char interfaceVersion;
  unsigned char interfaceCapabilities[6];
  unsigned char moduleReserved[12];
  uint8_t numNonces;
  uint16_t offsNonces;
  uint16_t freqM1;  
  uint8_t freqM;
  uint8_t freqMaxM;
  uint8_t freqMDefault;
  char* bitFileName;

  double errorCount[256];
  double errorWeight[256];
  double errorRate[256];
  double maxErrorRate[256];

  char repr[64];
};

struct libztex_dev_list { 
  struct libztex_device *dev;
  struct libztex_dev_list *next;
};

struct libztex_hash_data {
  uint32_t goldenNonce;
  uint32_t nonce;
  uint32_t hash7;
};

extern int libztex_scanDevices (struct libztex_dev_list ***devs);
extern void libztex_freeDevList (struct libztex_dev_list **devs);
extern void libztex_destroy_device (struct libztex_device* ztex);
extern int libztex_configureFpga (struct libztex_device *dev);
extern int libztex_setFreq (struct libztex_device *ztex, uint16_t freq);
extern int libztex_sendHashData (struct libztex_device *ztex, unsigned char *sendbuf);
extern int libztex_readHashData (struct libztex_device *ztex, struct libztex_hash_data nonces[]);
extern int libztex_resetFpga (struct libztex_device *ztex);

#endif /* __LIBZTEX_H__ */