thodg/cgminer

diff --git a/Makefile.am b/Makefile.am
index 02ee6f0..f94eae3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -13,7 +13,7 @@ EXTRA_DIST	= example.conf m4/gnulib-cache.m4 linux-usb-cgminer \
 
 SUBDIRS		= lib compat ccan
 
-INCLUDES	= $(PTHREAD_FLAGS) -fno-strict-aliasing $(JANSSON_INCLUDES)
+INCLUDES	= $(PTHREAD_FLAGS) -fno-strict-aliasing $(JANSSON_INCLUDES) $(USB_FLAGS)
 
 bin_PROGRAMS	= cgminer
 
@@ -22,7 +22,7 @@ bin_SCRIPTS	= *.cl
 cgminer_LDFLAGS	= $(PTHREAD_FLAGS)
 cgminer_LDADD	= $(DLOPEN_FLAGS) @LIBCURL_LIBS@ @JANSSON_LIBS@ @PTHREAD_LIBS@ \
 		  @OPENCL_LIBS@ @NCURSES_LIBS@ @PDCURSES_LIBS@ @WS2_LIBS@ \
-		  @UDEV_LIBS@ \
+		  @UDEV_LIBS@ @USB_LIBS@ \
 		  @MATH_LIBS@ lib/libgnu.a ccan/libccan.a
 cgminer_CPPFLAGS = -I$(top_builddir)/lib -I$(top_srcdir)/lib @OPENCL_FLAGS@
 
@@ -74,3 +74,7 @@ endif
 if HAS_ICARUS
 cgminer_SOURCES += icarus.c
 endif
+
+if HAS_ZTEX
+cgminer_SOURCES += ztex.c libztex.c
+endif
diff --git a/bitstreams/LICENSE.txt b/bitstreams/LICENSE.txt
new file mode 100644
index 0000000..99cd2ed
--- /dev/null
+++ b/bitstreams/LICENSE.txt
@@ -0,0 +1,24 @@
+All the bitstream files included in this directory that follow the name pattern ztex_*.bit are:
+
+----
+
+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 3 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/.
+
+----
+
+You can find the original sources at the BTCMiner project home page: http://www.ztex.de/btcminer/
+
diff --git a/bitstreams/ztex_ufm1_15b1.bit b/bitstreams/ztex_ufm1_15b1.bit
new file mode 100644
index 0000000..4ed6f4c
Binary files /dev/null and b/bitstreams/ztex_ufm1_15b1.bit differ
diff --git a/bitstreams/ztex_ufm1_15d1.bit b/bitstreams/ztex_ufm1_15d1.bit
new file mode 100644
index 0000000..b87eaf4
Binary files /dev/null and b/bitstreams/ztex_ufm1_15d1.bit differ
diff --git a/bitstreams/ztex_ufm1_15d3.bit b/bitstreams/ztex_ufm1_15d3.bit
new file mode 100644
index 0000000..78157a5
Binary files /dev/null and b/bitstreams/ztex_ufm1_15d3.bit differ
diff --git a/cgminer.c b/cgminer.c
index 33203dc..1577dec 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -54,7 +54,6 @@
 	#include <sys/wait.h>
 #endif
 
-
 enum workio_commands {
 	WC_GET_WORK,
 	WC_SUBMIT_WORK,
@@ -1017,6 +1016,9 @@ static char *opt_verusage_and_exit(const char *extra)
 #ifdef USE_ICARUS
 		"icarus "
 #endif
+#ifdef USE_ZTEX
+		"ztex "
+#endif
 		"mining support.\n"
 		, packagename);
 	printf("%s", opt_usage(opt_argv0, extra));
@@ -1526,6 +1528,8 @@ static bool submit_upstream_work(const struct work *work)
 	res = json_object_get(val, "result");
 
 	if (!QUIET) {
+#ifndef MIPSEB
+// This one segfaults on my router for some reason
 		isblock = regeneratehash(work);
 		if (isblock)
 			found_blocks++;
@@ -1533,6 +1537,7 @@ static bool submit_upstream_work(const struct work *work)
 		sprintf(hashshow, "%08lx.%08lx.%08lx%s",
 			(unsigned long)(hash32[7]), (unsigned long)(hash32[6]), (unsigned long)(hash32[5]),
 			isblock ? " BLOCK!" : "");
+#endif
 	}
 
 	/* Theoretically threads could race when modifying accepted and
@@ -4130,6 +4135,9 @@ static void clean_up(void)
 #ifdef HAVE_OPENCL
 	clear_adl(nDevs);
 #endif
+#ifdef HAVE_LIBUSB
+        libusb_exit(NULL);
+#endif
 
 	gettimeofday(&total_tv_end, NULL);
 #ifdef HAVE_CURSES
@@ -4385,6 +4393,10 @@ extern struct device_api bitforce_api;
 extern struct device_api icarus_api;
 #endif
 
+#ifdef USE_ZTEX
+extern struct device_api ztex_api;
+#endif
+
 
 static int cgminer_id_count = 0;
 
@@ -4419,6 +4431,9 @@ int main(int argc, char *argv[])
 	for  (i = 0; i < argc; i++)
 		initial_args[i] = strdup(argv[i]);
 	initial_args[argc] = NULL;
+#ifdef HAVE_LIBUSB
+        libusb_init(NULL);
+#endif
 
 	mutex_init(&hash_lock);
 	mutex_init(&qd_lock);
@@ -4572,6 +4587,10 @@ int main(int argc, char *argv[])
 	icarus_api.api_detect();
 #endif
 
+#ifdef USE_ZTEX
+	ztex_api.api_detect();
+#endif
+
 #ifdef WANT_CPUMINE
 	cpu_api.api_detect();
 #endif
diff --git a/configure.ac b/configure.ac
index 4f7ed9a..16dc55a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -62,6 +62,8 @@ AC_FUNC_ALLOCA
 
 have_win32=false
 PTHREAD_FLAGS="-lpthread"
+USB_LIBS=""
+USB_FLAGS=""
 DLOPEN_FLAGS="-ldl"
 OPENCL_LIBS="-lOpenCL"
 WS2_LIBS=""
@@ -207,6 +209,16 @@ if test "x$icarus" = xyes; then
 fi
 AM_CONDITIONAL([HAS_ICARUS], [test x$icarus = xyes])
 
+ztex="no"
+
+AC_ARG_ENABLE([ztex],
+	[AC_HELP_STRING([--enable-ztex],[Compile support for Ztex (default disabled)])],
+	[ztex=$enableval]
+	)
+if test "x$ztex" = xyes; then
+	AC_DEFINE([USE_ZTEX], [1], [Defined to 1 if Ztex support is wanted])
+fi
+AM_CONDITIONAL([HAS_ZTEX], [test x$ztex = xyes])
 
 curses="auto"
 
@@ -301,6 +313,14 @@ if test "x$bitforce" != xno; then
 fi
 AM_CONDITIONAL([HAVE_LIBUDEV], [test x$libudev != xno])
 
+if test "x$ztex" != xno; then
+  AC_CHECK_LIB(usb-1.0, libusb_init, ,
+          AC_MSG_ERROR([Could not find usb library - please install libusb]))
+  AC_DEFINE([HAVE_LIBUSB], [1], [Defined to 1 if libusb is wanted])
+  USB_LIBS="-lusb-1.0"
+  USB_FLAGS=""
+fi
+
 PKG_PROG_PKG_CONFIG()
 
 PKG_CHECK_MODULES([LIBCURL], [libcurl >= 7.15.6], [AC_DEFINE([CURL_HAS_SOCKOPT], [1], [Defined if version of curl supports sockopts.])],
@@ -362,6 +382,8 @@ AC_SUBST(PDCURSES_LIBS)
 AC_SUBST(WS2_LIBS)
 AC_SUBST(MATH_LIBS)
 AC_SUBST(UDEV_LIBS)
+AC_SUBST(USB_LIBS)
+AC_SUBST(USB_FLAGS)
 
 AC_CONFIG_FILES([
 	Makefile
@@ -393,13 +415,13 @@ if test "x$opencl" != xno; then
 		echo "  OpenCL...............: FOUND. GPU mining support enabled"
 	else
 		echo "  OpenCL...............: NOT FOUND. GPU mining support DISABLED"
-		if test "x$cpumining$bitforce$icarus" = xnonono; then
+		if test "x$cpumining$bitforce$icarus$ztex" = xnononono; then
 			AC_MSG_ERROR([No mining configured in])
 		fi
 	fi
 else
 	echo "  OpenCL...............: Detection overrided. GPU mining support DISABLED"
-	if test "x$cpumining$bitforce$icarus" = xnonono; then
+	if test "x$cpumining$bitforce$icarus$ztex" = xnononono; then
 		AC_MSG_ERROR([No mining configured in])
 	fi
 fi
@@ -427,6 +449,12 @@ else
 	echo "  Icarus.FPGAs.........: Disabled"
 fi
 
+if test "x$ztex" = xyes; then
+	echo "  Ztex.FPGAs...........: Enabled"
+else
+	echo "  Ztex.FPGAs...........: Disabled"
+fi
+
 if test "x$bitforce" != xno; then
 	echo "  libudev.detection....: $libudev"
 fi
@@ -441,8 +469,8 @@ echo
 echo "Compilation............: make (or gmake)"
 echo "  CPPFLAGS.............: $CPPFLAGS"
 echo "  CFLAGS...............: $CFLAGS"
-echo "  LDFLAGS..............: $LDFLAGS $PTHREAD_FLAGS"
-echo "  LDADD................: $DLOPEN_FLAGS $LIBCURL_LIBS $JANSSON_LIBS $PTHREAD_LIBS $OPENCL_LIBS $NCURSES_LIBS $PDCURSES_LIBS $WS2_LIBS $MATH_LIBS $UDEV_LIBS"
+echo "  LDFLAGS..............: $LDFLAGS $PTHREAD_FLAGS $USB_FLAGS"
+echo "  LDADD................: $DLOPEN_FLAGS $LIBCURL_LIBS $JANSSON_LIBS $PTHREAD_LIBS $OPENCL_LIBS $NCURSES_LIBS $PDCURSES_LIBS $WS2_LIBS $MATH_LIBS $UDEV_LIBS $USB_LIBS"
 echo
 echo "Installation...........: make install (as root if needed, with 'su' or 'sudo')"
 echo "  prefix...............: $prefix"
diff --git a/libztex.c b/libztex.c
new file mode 100644
index 0000000..28716d6
--- /dev/null
+++ b/libztex.c
@@ -0,0 +1,459 @@
+/**
+ *   libztex.c - 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/.
+**/
+
+#include <stdio.h>
+#include <unistd.h>
+#include "miner.h"
+#include "libztex.h"
+
+#define BUFSIZE 256
+
+//* Capability index for EEPROM support.
+#define CAPABILITY_EEPROM 0,0
+//* Capability index for FPGA configuration support. 
+#define CAPABILITY_FPGA 0,1
+//* Capability index for FLASH memory support.
+#define CAPABILITY_FLASH 0,2
+//* Capability index for DEBUG helper support.
+#define CAPABILITY_DEBUG 0,3
+//* Capability index for AVR XMEGA support.
+#define CAPABILITY_XMEGA 0,4
+//* Capability index for AVR XMEGA support.
+#define CAPABILITY_HS_FPGA 0,5
+//* Capability index for AVR XMEGA support.
+#define CAPABILITY_MAC_EEPROM 0,6
+
+
+
+static bool libztex_checkDevice (struct libusb_device *dev) {
+	int err;
+
+	struct libusb_device_descriptor desc;
+	err = libusb_get_device_descriptor(dev, &desc);
+	if (unlikely(err != 0)) {
+		applog(LOG_ERR, "Ztex check device: Failed to open read descriptor with error %d", err);
+		return false;
+	}
+	if (!(desc.idVendor == LIBZTEX_IDVENDOR && desc.idProduct == LIBZTEX_IDPRODUCT)) {
+		applog(LOG_DEBUG, "Not a ZTEX device %0.4x:%0.4x", desc.idVendor, desc.idProduct);
+		return false;
+	}
+	return true;
+}
+
+static bool libztex_checkCapability (struct libztex_device *ztex, int i, int j) {
+	if (!((i>=0) && (i<=5) && (j>=0) && (j<8) &&
+	     (((ztex->interfaceCapabilities[i] & 255) & (1 << j)) != 0)))
+		applog(LOG_ERR, "%s: capability missing: %d %d", ztex->repr, i, i);
+	return true;
+}
+
+static int libztex_detectBitstreamBitOrder (const unsigned char *buf, int size) {
+	int i;
+	size -= 4;
+	for (i=0; i<size; i++) {
+		if ( ((buf[i] & 255)==0xaa) && ((buf[i+1] & 255)==0x99) && ((buf[i+2] & 255)==0x55) && ((buf[i+3] & 255)==0x66) )
+			return 1;
+		if ( ((buf[i] & 255)==0x55) && ((buf[i+1] & 255)==0x99) && ((buf[i+2] & 255)==0xaa) && ((buf[i+3] & 255)==0x66) )
+			return 0;
+	} 
+	applog(LOG_WARNING, "Unable to determine bitstream bit order: no signature found");
+	return 0;
+}
+
+static void libztex_swapBits (unsigned char *buf, int size) {
+	int i;
+	unsigned char c;
+	for (i=0; i<size; i++) {
+		c = buf[i];
+		buf[i] = ((c & 128) >> 7) |
+		         ((c & 64) >> 5) |
+		         ((c & 32) >> 3) |
+		         ((c & 16) >> 1) |
+		         ((c & 8) << 1) |
+		         ((c & 4) << 3) |
+		         ((c & 2) << 5) |
+		         ((c & 1) << 7);
+	}
+}
+
+static int libztex_getFpgaState (struct libztex_device *ztex, struct libztex_fpgastate *state) {
+	int cnt;
+	unsigned char buf[9];
+	if (!libztex_checkCapability(ztex, CAPABILITY_FPGA))
+		return -1;
+	cnt = libusb_control_transfer(ztex->hndl, 0xc0, 0x30, 0, 0, buf, 9, 1000);
+	if (unlikely(cnt < 0)) {
+		applog(LOG_ERR, "%s: Failed getFpgaState with err %d", ztex->repr, cnt);
+		return cnt;
+	}
+	state->fpgaConfigured = (buf[0] == 0);
+	state->fpgaChecksum = buf[1] & 0xff;
+	state->fpgaBytes = ((buf[5] & 0xff)<<24) | ((buf[4] & 0xff)<<16) | ((buf[3] & 0xff)<<8) | (buf[2] & 0xff);
+	state->fpgaInitB = buf[6] & 0xff;
+	state->fpgaFlashResult = buf[7];
+	state->fpgaFlashBitSwap = (buf[8] != 0);
+	return 0;
+}
+
+static int libztex_configureFpgaLS (struct libztex_device *ztex, const char* firmware, bool force, char bs) {
+	struct libztex_fpgastate state;
+	ssize_t pos=0;
+	int transactionBytes = 2048;
+	unsigned char buf[transactionBytes], cs;
+	int tries, cnt, buf_p, i;
+	FILE *fp;
+
+	if (!libztex_checkCapability(ztex, CAPABILITY_FPGA))
+		return -1;
+
+	libztex_getFpgaState(ztex, &state);
+	if (!force && state.fpgaConfigured) {
+		applog(LOG_DEBUG, "Bitstream already configured");
+		return 1;
+	}
+
+	for (tries=10; tries>0; tries--) {
+
+		fp = fopen(firmware, "rb");
+		if (!fp) {
+			applog(LOG_ERR, "%s: failed to read firmware '%s'", ztex->repr, firmware);
+			return -2;
+		}
+
+		cs = 0;
+		while (pos < transactionBytes && !feof(fp)) {
+			buf[pos] = getc(fp);
+			cs += buf[pos++];
+		};
+		if (feof(fp))
+			pos--;
+
+		if ( bs != 0 && bs != 1 )
+			bs = libztex_detectBitstreamBitOrder(buf, transactionBytes<pos ? transactionBytes : pos);
+
+		//* Reset fpga
+		cnt = libztex_resetFpga(ztex);
+		if (unlikely(cnt < 0)) {
+			applog(LOG_ERR, "%s: Failed reset fpga with err %d", ztex->repr, cnt);
+			continue;
+		}
+
+		if ( bs == 1 )
+			libztex_swapBits(buf, pos);
+	 
+		buf_p = pos;
+		while (1) {
+			i = 0;
+			while (i < buf_p) {
+				cnt = libusb_control_transfer(ztex->hndl, 0x40, 0x32, 0, 0, &buf[i], buf_p-i, 5000);
+				if (unlikely(cnt < 0)) {
+					applog(LOG_ERR, "%s: Failed send fpga data with err %d", ztex->repr, cnt);
+					break;
+				}
+				i += cnt;
+			}
+			if (i < buf_p || buf_p < transactionBytes)
+				break;
+			buf_p = 0;
+			while (buf_p < transactionBytes && !feof(fp)) {
+				buf[buf_p] = getc(fp);
+				cs += buf[buf_p++];
+			};
+			if (feof(fp))
+				buf_p--;
+			pos += buf_p;
+			if (buf_p == 0)
+				break;
+			if ( bs == 1 )
+				libztex_swapBits(buf, buf_p);
+		}
+		if (cnt >= 0)
+			tries = 0;
+
+		fclose(fp);
+	}
+	libztex_getFpgaState(ztex, &state);
+	if (!state.fpgaConfigured) {
+		applog(LOG_ERR, "%s: FPGA configuration failed: DONE pin does not go high", ztex->repr);
+		return 3;
+	}
+	usleep(200000);
+	applog(LOG_INFO, "%s: FPGA configuration done", ztex->repr);
+	return 0;
+}
+
+int libztex_configureFpga (struct libztex_device *ztex) {
+	int rv;
+	char buf[256] = "bitstreams/";
+	memset(&buf[11], 0, 245);
+	strcpy(&buf[11], ztex->bitFileName);
+	strcpy(&buf[strlen(buf)], ".bit");
+
+	rv = libztex_configureFpgaLS(ztex, buf, true, 2);
+	return rv;
+}
+
+int libztex_setFreq (struct libztex_device *ztex, uint16_t freq) {
+	int cnt;
+	if (freq > ztex->freqMaxM)
+		freq = ztex->freqMaxM;
+
+	cnt = libusb_control_transfer(ztex->hndl, 0x40, 0x83, freq, 0, NULL, 0, 500);
+	if (unlikely(cnt < 0)) {
+		applog(LOG_ERR, "Ztex check device: Failed to set frequency with err %d", cnt);
+		return cnt;
+	}
+	ztex->freqM = freq;
+	applog(LOG_WARNING, "%s: Frequency change to %0.2f Mhz", ztex->repr, ztex->freqM1 * (ztex->freqM + 1));
+
+	return 0;
+}
+
+int libztex_resetFpga (struct libztex_device *ztex) {
+	return libusb_control_transfer(ztex->hndl, 0x40, 0x31, 0, 0, NULL, 0, 1000);
+}
+
+int libztex_prepare_device (struct libusb_device *dev, struct libztex_device** ztex) {
+	struct libztex_device *newdev;
+	int cnt, err;
+	unsigned char buf[64];
+
+	newdev = malloc(sizeof(struct libztex_device));
+	newdev->valid = false;
+	newdev->hndl = NULL;
+	newdev->bitFileName = NULL;
+	*ztex = newdev;
+
+	err = libusb_get_device_descriptor(dev, &newdev->descriptor);
+	if (unlikely(err != 0)) {
+		applog(LOG_ERR, "Ztex check device: Failed to open read descriptor with error %d", err);
+		return err;
+	}
+
+	// Check vendorId and productId
+	if (!(newdev->descriptor.idVendor == LIBZTEX_IDVENDOR &&
+				newdev->descriptor.idProduct == LIBZTEX_IDPRODUCT)) {
+		applog(LOG_ERR, "Not a ztex device? %0.4X, %0.4X", newdev->descriptor.idVendor, newdev->descriptor.idProduct);
+		return 1;
+	}
+
+	err = libusb_open(dev, &newdev->hndl);
+	if (unlikely(err != 0)) {
+		applog(LOG_ERR, "Ztex check device: Failed to open handle with error %d", err);
+		return err;
+	}
+
+	cnt = libusb_get_string_descriptor_ascii (newdev->hndl, newdev->descriptor.iSerialNumber, newdev->snString,
+	                                          LIBZTEX_SNSTRING_LEN+1);
+	if (unlikely(cnt < 0)) {
+		applog(LOG_ERR, "Ztex check device: Failed to read device snString with err %d", cnt);
+		return cnt;
+	}
+
+	cnt = libusb_control_transfer(newdev->hndl, 0xc0, 0x22, 0, 0, buf, 40, 500);
+	if (unlikely(cnt < 0)) {
+		applog(LOG_ERR, "Ztex check device: Failed to read ztex descriptor with err %d", cnt);
+		return cnt;
+	}
+	
+	if ( buf[0]!=40 || buf[1]!=1 || buf[2]!='Z' || buf[3]!='T' || buf[4]!='E' || buf[5]!='X' ) {
+		applog(LOG_ERR, "Ztex check device: Error reading ztex descriptor");
+		return 2;
+	}
+
+	newdev->productId[0] = buf[6];
+	newdev->productId[1] = buf[7];
+	newdev->productId[2] = buf[8];
+	newdev->productId[3] = buf[9];
+	newdev->fwVersion = buf[10];
+	newdev->interfaceVersion = buf[11];
+	newdev->interfaceCapabilities[0] = buf[12];
+	newdev->interfaceCapabilities[1] = buf[13];
+	newdev->interfaceCapabilities[2] = buf[14];
+	newdev->interfaceCapabilities[3] = buf[15];
+	newdev->interfaceCapabilities[4] = buf[16];
+	newdev->interfaceCapabilities[5] = buf[17];
+	newdev->moduleReserved[0] = buf[18];
+	newdev->moduleReserved[1] = buf[19];
+	newdev->moduleReserved[2] = buf[20];
+	newdev->moduleReserved[3] = buf[21];
+	newdev->moduleReserved[4] = buf[22];
+	newdev->moduleReserved[5] = buf[23];
+	newdev->moduleReserved[6] = buf[24];
+	newdev->moduleReserved[7] = buf[25];
+	newdev->moduleReserved[8] = buf[26];
+	newdev->moduleReserved[9] = buf[27];
+	newdev->moduleReserved[10] = buf[28];
+	newdev->moduleReserved[11] = buf[29];
+
+
+	cnt = libusb_control_transfer(newdev->hndl, 0xc0, 0x82, 0, 0, buf, 64, 500);
+	if (unlikely(cnt < 0)) {
+		applog(LOG_ERR, "Ztex check device: Failed to read ztex descriptor with err %d", cnt);
+		return cnt;
+	}
+
+	if (unlikely(buf[0] != 4)) {
+		if (unlikely(buf[0] != 2)) {
+			applog(LOG_ERR, "Invalid BTCMiner descriptor version. Firmware must be updated (%d).", buf[0]);
+			return 3;
+		}
+		applog(LOG_WARNING, "Firmware out of date");
+	}
+
+	newdev->numNonces = buf[1] + 1;
+	newdev->offsNonces = ((buf[2] & 255) | ((buf[3] & 255) << 8)) - 10000;
+	newdev->freqM1 = ( (buf[4] & 255) | ((buf[5] & 255) << 8) ) * 0.01;
+	newdev->freqMaxM = (buf[7] & 255);
+	newdev->freqM = (buf[6] & 255);
+	newdev->freqMDefault = newdev->freqM;
+
+	for (cnt=0; cnt<255; cnt++) {
+		newdev->errorCount[cnt] = 0;
+		newdev->errorWeight[cnt] = 0;
+		newdev->errorRate[cnt] = 0;
+		newdev->maxErrorRate[cnt] = 0;
+	}
+
+	cnt = strlen((char *)&buf[buf[0]==4?10:8]);
+	newdev->bitFileName = malloc(sizeof(char)*(cnt+1));
+	memcpy(newdev->bitFileName, &buf[buf[0]==4?10:8], cnt+1);	
+
+	newdev->usbbus = libusb_get_bus_number(dev);
+	newdev->usbaddress = libusb_get_device_address(dev);
+	sprintf(newdev->repr, "ZTEX %.3d:%.3d-%s", newdev->usbbus, newdev->usbaddress, newdev->snString);
+	newdev->valid = true;
+	return 0;
+}
+
+void libztex_destroy_device (struct libztex_device* ztex) {
+	if (ztex->hndl != NULL) {
+		libusb_close(ztex->hndl);
+		ztex->hndl = NULL;
+	}
+	if (ztex->bitFileName != NULL) {
+		free(ztex->bitFileName);
+		ztex->bitFileName = NULL;
+	}
+	free(ztex);
+}
+
+int libztex_scanDevices (struct libztex_dev_list*** devs_p) {
+	libusb_device **list;
+	struct libztex_device *ztex;
+	ssize_t cnt = libusb_get_device_list(NULL, &list);
+	ssize_t i = 0;
+	int found = 0, pos = 0, err;
+	
+	if (unlikely(cnt < 0)) {
+		applog(LOG_ERR, "Ztex scan devices: Failed to list usb devices with err %d", cnt);
+		return 0;
+	}
+
+	int usbdevices[LIBZTEX_MAX_DESCRIPTORS];
+
+	for (i = 0; i < cnt; i++) {
+		if (libztex_checkDevice(list[i])) {
+			// Got one!
+			usbdevices[found] = i;
+			found++;
+		}
+	}
+
+	struct libztex_dev_list **devs;
+	devs = malloc(sizeof(struct libztex_dev_list *) * found);
+	if (devs == NULL) {
+		applog(LOG_ERR, "Ztex scan devices: Failed to allocate memory");
+		return 0;
+	}
+
+	for (i = 0; i < found; i++) {
+		err = libztex_prepare_device(list[usbdevices[i]], &ztex);
+		if (unlikely(err != 0))
+			applog(LOG_ERR, "prepare device: %d", err);
+		// check if valid
+		if (!ztex->valid) {
+			libztex_destroy_device(ztex);
+			continue;
+		}
+		devs[pos] = malloc(sizeof(struct libztex_dev_list));
+		devs[pos]->dev = ztex;
+		devs[pos]->next = NULL;
+		if (pos > 0)
+			devs[pos-1]->next = devs[pos];
+		pos++;
+	}
+
+	libusb_free_device_list(list, 1);
+	*devs_p = devs;
+	return pos;
+}
+
+int libztex_sendHashData (struct libztex_device *ztex, unsigned char *sendbuf) {
+	int cnt;
+	if (ztex == NULL || ztex->hndl == NULL)
+		return 0;
+	cnt = libusb_control_transfer(ztex->hndl, 0x40, 0x80, 0, 0, sendbuf, 44, 1000);
+	if (unlikely(cnt < 0))
+		applog(LOG_ERR, "%s: Failed sendHashData with err %d", ztex->repr, cnt);
+	
+	return cnt;
+}
+
+int libztex_readHashData (struct libztex_device *ztex, struct libztex_hash_data nonces[]) {
+	// length of buf must be 8 * (numNonces + 1)
+	unsigned char rbuf[12*8];
+	int cnt, i;
+
+	if (ztex->hndl == NULL)
+		return 0;
+	
+	cnt = libusb_control_transfer(ztex->hndl, 0xc0, 0x81, 0, 0, rbuf, 12*ztex->numNonces, 1000);
+	if (unlikely(cnt < 0)) {
+		applog(LOG_ERR, "%s: Failed readHashData with err %d", ztex->repr, cnt);
+		return cnt;
+	}
+
+	for (i=0; i<ztex->numNonces; i++) {
+		memcpy((char*)&nonces[i].goldenNonce, &rbuf[i*12], 4);
+		nonces[i].goldenNonce -= ztex->offsNonces;
+		memcpy((char*)&nonces[i].nonce, &rbuf[(i*12)+4], 4);
+		nonces[i].nonce -= ztex->offsNonces;
+		memcpy((char*)&nonces[i].hash7, &rbuf[(i*12)+8], 4);
+	}
+	
+	return cnt;
+}
+
+void libztex_freeDevList (struct libztex_dev_list **devs) {
+	ssize_t cnt = 0;
+	bool done = false;
+	while (!done) {
+		if (devs[cnt]->next == NULL)
+			done = true;
+		free(devs[cnt++]);
+	}
+	free(devs);
+}
+
+
diff --git a/libztex.h b/libztex.h
new file mode 100644
index 0000000..5f88af9
--- /dev/null
+++ b/libztex.h
@@ -0,0 +1,95 @@
+/**
+ *   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;
+	double 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 int libztex_prepare_device (struct libusb_device *dev, struct libztex_device** ztex);
+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__ */
diff --git a/miner.h b/miner.h
index 24a6ef3..69abfe7 100644
--- a/miner.h
+++ b/miner.h
@@ -61,6 +61,14 @@ void *alloca (size_t);
  #include "ADL_SDK/adl_sdk.h"
 #endif
 
+#ifdef HAVE_LIBUSB
+  #include <libusb-1.0/libusb.h>
+#endif
+
+#ifdef USE_ZTEX
+  #include "libztex.h"
+#endif
+
 #if !defined(WIN32) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
 #define bswap_16 __builtin_bswap16
 #define bswap_32 __builtin_bswap32
@@ -249,6 +257,9 @@ struct cgpu_info {
 	int device_id;
 	char *device_path;
 	FILE *device_file;
+#ifdef USE_ZTEX
+        struct libztex_device *device;
+#endif
 	int device_fd;
 
 	enum dev_enable deven;
diff --git a/mkinstalldirs b/mkinstalldirs
old mode 100644
new mode 100755
diff --git a/todo_ztex.txt b/todo_ztex.txt
new file mode 100644
index 0000000..4014b04
--- /dev/null
+++ b/todo_ztex.txt
@@ -0,0 +1,5 @@
+- verify setting cgpu.status=DEAD does in fact stop the thread
+- allow configuring bitstream directory
+- HS fpga config
+- allow configuring LIBZTEX_OVERHEATTHRESHOLD
+- hotplug support?
diff --git a/ztex.c b/ztex.c
new file mode 100644
index 0000000..e5ada7b
--- /dev/null
+++ b/ztex.c
@@ -0,0 +1,323 @@
+/**
+ *   ztex.c - cgminer worker for Ztex 1.15x fpga board
+ *
+ *   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 work is based upon the icarus.c worker which is
+ *   Copyright 2012 Luke Dashjr
+ *   Copyright 2012 Xiangfu <xiangfu@openmobilefree.com>
+ *
+ *   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/.
+**/
+#include <unistd.h>
+#include <sha2.h>
+#include "miner.h"
+#include "libztex.h"
+
+#define GOLDEN_BACKLOG 5
+
+struct device_api ztex_api, ztex_hotplug_api;
+
+// Forward declarations
+static void ztex_disable (struct thr_info* thr);
+static bool ztex_prepare(struct thr_info *thr);
+
+static void ztex_detect()
+{
+	int cnt;
+	int i;
+	struct libztex_dev_list **ztex_devices;
+
+	cnt = libztex_scanDevices(&ztex_devices);
+	applog(LOG_WARNING, "Found %d ztex board(s)", cnt);
+
+	for (i=0; i<cnt; i++) {
+		if (total_devices == MAX_DEVICES)
+			break;
+		struct cgpu_info *ztex;
+		ztex = calloc(1, sizeof(struct cgpu_info));
+		ztex->api = &ztex_api;
+		ztex->device_id = total_devices;
+		ztex->device = ztex_devices[i]->dev;
+		ztex->threads = 1;
+		devices[total_devices++] = ztex;
+
+		applog(LOG_WARNING,"%s: Found Ztex, mark as %d", ztex->device->repr, ztex->device_id);
+	}
+
+	if (cnt > 0)
+		libztex_freeDevList(ztex_devices);
+}
+
+static bool ztex_updateFreq (struct libztex_device* ztex)
+{
+	int i, maxM, bestM;
+	double bestR, r;
+
+	for (i=0; i<ztex->freqMaxM; i++)
+		if (ztex->maxErrorRate[i+1]*i < ztex->maxErrorRate[i]*(i+20))
+			ztex->maxErrorRate[i+1] = ztex->maxErrorRate[i]*(1.0+20.0/i);
+
+	maxM = 0;
+	while (maxM<ztex->freqMDefault && ztex->maxErrorRate[maxM+1]<LIBZTEX_MAXMAXERRORRATE)
+		maxM++;
+	while (maxM<ztex->freqMaxM && ztex->errorWeight[maxM]>150 && ztex->maxErrorRate[maxM+1]<LIBZTEX_MAXMAXERRORRATE)
+		maxM++;
+
+	bestM = 0;
+	bestR = 0;
+	for (i=0; i<=maxM; i++) {
+		r = (i + 1 + ( i == ztex->freqM ? LIBZTEX_ERRORHYSTERESIS : 0))*(1-ztex->maxErrorRate[i]);
+		if (r > bestR) {
+			bestM = i;
+			bestR = r;
+		}
+	}
+
+	if (bestM != ztex->freqM) 
+		libztex_setFreq(ztex, bestM);
+
+	maxM = ztex->freqMDefault;
+	while (maxM<ztex->freqMaxM && ztex->errorWeight[maxM+1] > 100)
+		maxM++;
+	if ((bestM < (1.0-LIBZTEX_OVERHEATTHRESHOLD) * maxM) && bestM < maxM - 1) {
+		libztex_resetFpga(ztex);
+		applog(LOG_ERR, "%s: frequency drop of %.1f%% detect. This may be caused by overheating. FPGA is shut down to prevent damage.", ztex->repr, (1.0-1.0*bestM/maxM)*100);
+		return false;
+	}
+	return true;
+}
+
+
+static bool ztex_checkNonce (struct libztex_device *ztex,
+                             struct work *work,
+                             struct libztex_hash_data *hdata)
+{
+	uint32_t *data32 = (uint32_t *)(work->data);
+	unsigned char swap[128];
+	uint32_t *swap32 = (uint32_t *)swap;
+	unsigned char hash1[32];
+	unsigned char hash2[32];
+	uint32_t *hash2_32 = (uint32_t *)hash2;
+	int i;
+
+#if defined(__BIGENDIAN__) || defined(MIPSEB)
+	hdata->nonce = swab32(hdata->nonce);
+	hdata->hash7 = swab32(hdata->hash7);
+#endif
+
+	work->data[64 + 12 + 0] = (hdata->nonce >> 0) & 0xff;
+	work->data[64 + 12 + 1] = (hdata->nonce >> 8) & 0xff;
+	work->data[64 + 12 + 2] = (hdata->nonce >> 16) & 0xff;
+	work->data[64 + 12 + 3] = (hdata->nonce >> 24) & 0xff;
+
+	for (i = 0; i < 80 / 4; i++)
+		swap32[i] = swab32(data32[i]);
+	
+	sha2(swap, 80, hash1, false);
+	sha2(hash1, 32, hash2, false);
+#if defined(__BIGENDIAN__) || defined(MIPSEB)
+	if (hash2_32[7] != ((hdata->hash7 + 0x5be0cd19) & 0xFFFFFFFF)) {
+#else
+	if (swab32(hash2_32[7]) != ((hdata->hash7 + 0x5be0cd19) & 0xFFFFFFFF)) {
+#endif
+		ztex->errorCount[ztex->freqM] += 1.0/ztex->numNonces;
+		applog(LOG_DEBUG, "%s: checkNonce failed for %0.8X", ztex->repr, hdata->nonce);
+		return false;
+	}
+	return true;
+}
+
+static uint64_t ztex_scanhash(struct thr_info *thr, struct work *work,
+                              __maybe_unused uint64_t max_nonce)
+{
+	struct libztex_device *ztex;
+	unsigned char sendbuf[44];
+	int i, j;
+	uint32_t backlog[GOLDEN_BACKLOG];
+	int backlog_p = 0;
+	uint32_t lastnonce[GOLDEN_BACKLOG], nonce, noncecnt = 0;
+	bool overflow, found, rv;
+	struct libztex_hash_data hdata[GOLDEN_BACKLOG];
+
+	ztex = thr->cgpu->device;
+
+	memcpy(sendbuf, work->data + 64, 12);
+	memcpy(sendbuf+12, work->midstate, 32);
+	memset(backlog, 0, sizeof(backlog));
+	i = libztex_sendHashData(ztex, sendbuf);
+	if (i < 0) {
+		// Something wrong happened in send
+		applog(LOG_ERR, "%s: Failed to send hash data with err %d, retrying", ztex->repr, i);
+		usleep(500000);
+		i = libztex_sendHashData(ztex, sendbuf);
+		if (i < 0) {
+			// And there's nothing we can do about it
+			ztex_disable(thr);
+			applog(LOG_ERR, "%s: Failed to send hash data with err %d, giving up", ztex->repr, i);
+			return 0;
+		}
+	}
+	
+	applog(LOG_DEBUG, "sent hashdata");
+
+	for (i=0; i<ztex->numNonces; i++)
+		lastnonce[i] = 0;
+
+	overflow = false;
+
+	while (!(overflow || work_restart[thr->id].restart)) {
+		usleep(250000);
+		if (work_restart[thr->id].restart) {
+			applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
+			break;
+		}
+		i = libztex_readHashData(ztex, &hdata[0]);
+		if (i < 0) {
+			// Something wrong happened in read
+			applog(LOG_ERR, "%s: Failed to read hash data with err %d, retrying", ztex->repr, i);
+			usleep(500000);
+			i = libztex_readHashData(ztex, &hdata[0]);
+			if (i < 0) {
+				// And there's nothing we can do about it
+				ztex_disable(thr);
+				applog(LOG_ERR, "%s: Failed to read hash data with err %d, giving up", ztex->repr, i);
+				return 0;
+			}
+		}
+
+		if (work_restart[thr->id].restart) {
+			applog(LOG_DEBUG, "%s: New work detected", ztex->repr);
+			break;
+		}
+
+		ztex->errorCount[ztex->freqM] *= 0.995;
+		ztex->errorWeight[ztex->freqM] = ztex->errorWeight[ztex->freqM] * 0.995 + 1.0;
+ 
+		for (i=0; i<ztex->numNonces; i++) {
+			nonce = hdata[i].nonce;
+#if defined(__BIGENDIAN__) || defined(MIPSEB)
+			nonce = swab32(nonce);
+#endif
+			if (nonce > noncecnt)
+				noncecnt = nonce;
+			if (((nonce & 0x7fffffff) >> 4) < ((lastnonce[i] & 0x7fffffff) >> 4)) {
+				applog(LOG_DEBUG, "%s: overflow nonce=%0.8x lastnonce=%0.8x", ztex->repr, nonce, lastnonce[i]);
+				overflow = true;
+			} else {
+				lastnonce[i] = nonce;
+			}
+#if !(defined(__BIGENDIAN__) || defined(MIPSEB))
+			nonce = swab32(nonce);
+#endif
+			if (!ztex_checkNonce(ztex, work, &hdata[i])) {
+				thr->cgpu->hw_errors++;
+				continue;
+			}
+			nonce = hdata[i].goldenNonce;
+			if (nonce > 0) {
+				found = false;
+				for (j=0; j<GOLDEN_BACKLOG; j++) {
+					if (backlog[j] == nonce) {
+						found = true;
+						break;
+					}
+				}
+				if (!found) {
+					applog(LOG_DEBUG, "%s: Share found", ztex->repr);
+					backlog[backlog_p++] = nonce;
+					if (backlog_p >= GOLDEN_BACKLOG)
+						backlog_p = 0;
+#if defined(__BIGENDIAN__) || defined(MIPSEB)
+					nonce = swab32(nonce);
+#endif
+					work->blk.nonce = 0xffffffff;
+					rv = submit_nonce(thr, work, nonce);
+					applog(LOG_DEBUG, "%s: submitted %0.8x %d", ztex->repr, nonce, rv);
+				}
+			}
+
+		}
+
+	}
+
+	ztex->errorRate[ztex->freqM] = ztex->errorCount[ztex->freqM] /	ztex->errorWeight[ztex->freqM] * (ztex->errorWeight[ztex->freqM]<100 ? ztex->errorWeight[ztex->freqM]*0.01 : 1.0);
+	if (ztex->errorRate[ztex->freqM] > ztex->maxErrorRate[ztex->freqM])
+		ztex->maxErrorRate[ztex->freqM] = ztex->errorRate[ztex->freqM];
+
+	if (!ztex_updateFreq(ztex))
+		// Something really serious happened, so mark this thread as dead!
+		return 0;
+
+	applog(LOG_DEBUG, "%s: exit %1.8X", ztex->repr, noncecnt);
+
+	work->blk.nonce = 0xffffffff;
+
+	return noncecnt > 0 ? noncecnt : 1;
+}
+
+static void ztex_statline_before(char *buf, struct cgpu_info *cgpu)
+{
+	if (cgpu->deven == DEV_ENABLED) {
+		tailsprintf(buf, "%s | ", cgpu->device->snString);
+		tailsprintf(buf, "%0.2fMhz | ", cgpu->device->freqM1 * (cgpu->device->freqM + 1));
+	}
+}
+
+static bool ztex_prepare(struct thr_info *thr)
+{
+	struct timeval now;
+	struct cgpu_info *ztex = thr->cgpu;
+
+	gettimeofday(&now, NULL);
+	get_datestamp(ztex->init, &now);
+
+	if (libztex_configureFpga(ztex->device) != 0)
+		return false;
+
+	ztex->device->freqM = -1;
+	ztex_updateFreq(ztex->device);
+
+	applog(LOG_DEBUG, "%s: prepare", ztex->device->repr);
+	return true;
+}
+
+static void ztex_shutdown(struct thr_info *thr)
+{
+	if (thr->cgpu->device != NULL) {
+		applog(LOG_DEBUG, "%s: shutdown", thr->cgpu->device->repr);
+		libztex_destroy_device(thr->cgpu->device);
+		thr->cgpu->device = NULL;
+	}
+}
+
+static void ztex_disable (struct thr_info *thr)
+{
+	applog(LOG_ERR, "%s: Disabling!", thr->cgpu->device->repr);
+	devices[thr->cgpu->device_id]->deven = DEV_DISABLED;
+	ztex_shutdown(thr);
+}
+
+struct device_api ztex_api = {
+	.name = "ZTX",
+	.api_detect = ztex_detect,
+	.get_statline_before = ztex_statline_before,
+	.thread_prepare = ztex_prepare,
+	.scanhash = ztex_scanhash,
+	.thread_shutdown = ztex_shutdown,
+};
+