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thodg/cgminer/usbutils.c

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  • Author : Kano
    Date : 2013-04-07 07:46:45
    Hash : b7b5b9de
    Message : usbutils more stats for bflsc

  • usbutils.c
  • /*
     * Copyright 2012-2013 Andrew Smith
     *
     * This program is free software; you can redistribute it and/or modify it
     * under the terms of the GNU General Public License as published by the Free
     * Software Foundation; either version 3 of the License, or (at your option)
     * any later version.  See COPYING for more details.
     */
    
    #include "config.h"
    
    #include <ctype.h>
    #include <stdint.h>
    #include <stdbool.h>
    
    #include "logging.h"
    #include "miner.h"
    #include "usbutils.h"
    
    #define NODEV(err) ((err) == LIBUSB_ERROR_NO_DEVICE || \
    			(err) == LIBUSB_ERROR_PIPE || \
    			(err) == LIBUSB_ERROR_OTHER)
    
    #ifdef USE_BFLSC
    #define DRV_BFLSC 1
    #endif
    
    #ifdef USE_BITFORCE
    #define DRV_BITFORCE 2
    #endif
    
    #ifdef USE_MODMINER
    #define DRV_MODMINER 3
    #endif
    
    #ifdef USE_ZTEX
    #define DRV_ZTEX 4
    #endif
    
    #ifdef USE_ICARUS
    #define DRV_ICARUS 5
    #endif
    
    #ifdef USE_AVALON
    #define DRV_AVALON 6
    #endif
    
    #define DRV_LAST -1
    
    #define USB_CONFIG 1
    
    #define EPI(x) (LIBUSB_ENDPOINT_IN | (unsigned char)(x))
    #define EPO(x) (LIBUSB_ENDPOINT_OUT | (unsigned char)(x))
    
    #ifdef WIN32
    #define BFLSC_TIMEOUT_MS 500
    #define BITFORCE_TIMEOUT_MS 999
    #define MODMINER_TIMEOUT_MS 200
    #define AVALON_TIMEOUT_MS 500
    #else
    #define BFLSC_TIMEOUT_MS 200
    #define BITFORCE_TIMEOUT_MS 200
    #define MODMINER_TIMEOUT_MS 100
    #define AVALON_TIMEOUT_MS 200
    #endif
    
    #ifdef USE_BFLSC
    // N.B. transfer size is 512 with USB2.0, but only 64 with USB1.1
    static struct usb_endpoints bas_eps[] = {
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPI(1), 0 },
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPO(2), 0 }
    };
    #endif
    
    #ifdef USE_BITFORCE
    // N.B. transfer size is 512 with USB2.0, but only 64 with USB1.1
    static struct usb_endpoints bfl_eps[] = {
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPI(1), 0 },
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPO(2), 0 }
    };
    #endif
    
    #ifdef USE_MODMINER
    static struct usb_endpoints mmq_eps[] = {
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPI(3), 0 },
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPO(3), 0 }
    };
    #endif
    
    #ifdef USE_AVALON
    static struct usb_endpoints ava_eps[] = {
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPI(1), 0 },
    	{ LIBUSB_TRANSFER_TYPE_BULK,	64,	EPO(2), 0 }
    };
    #endif
    
    // TODO: Add support for (at least) Isochronous endpoints
    static struct usb_find_devices find_dev[] = {
    /*
    #ifdef USE_ICARUS
    	{ DRV_ICARUS, 	"ICA",	0x067b,	0x0230,	true,	EPI(3),	EPO(2), 1 },
    	{ DRV_ICARUS, 	"LOT",	0x0403,	0x6001,	false,	EPI(0),	EPO(0), 1 },
    	{ DRV_ICARUS, 	"CM1",	0x067b,	0x0230,	false,	EPI(0),	EPO(0), 1 },
    #endif
    */
    #ifdef USE_BFLSC
    	{
    		.drv = DRV_BFLSC,
    		.name = "BAS",
    		.idVendor = 0x0403,
    		.idProduct = 0x6014,
    		.kernel = 0,
    		.config = 1,
    		.interface = 0,
    		.timeout = BFLSC_TIMEOUT_MS,
    		.epcount = ARRAY_SIZE(bas_eps),
    		.eps = bas_eps },
    #endif
    #ifdef USE_BITFORCE
    	{
    		.drv = DRV_BITFORCE,
    		.name = "BFL",
    		.idVendor = 0x0403,
    		.idProduct = 0x6014,
    		.kernel = 0,
    		.config = 1,
    		.interface = 0,
    		.timeout = BITFORCE_TIMEOUT_MS,
    		.epcount = ARRAY_SIZE(bfl_eps),
    		.eps = bfl_eps },
    #endif
    #ifdef USE_MODMINER
    	{
    		.drv = DRV_MODMINER,
    		.name = "MMQ",
    		.idVendor = 0x1fc9,
    		.idProduct = 0x0003,
    		.kernel = 0,
    		.config = 1,
    		.interface = 1,
    		.timeout = MODMINER_TIMEOUT_MS,
    		.epcount = ARRAY_SIZE(mmq_eps),
    		.eps = mmq_eps },
    #endif
    #ifdef USE_AVALON
    	{
    		.drv = DRV_AVALON,
    		.name = "AVA",
    		.idVendor = 0x0403,
    		.idProduct = 0x6001,
    		.kernel = 0,
    		.config = 1,
    		.interface = 1,
    		.timeout = AVALON_TIMEOUT_MS,
    		.epcount = ARRAY_SIZE(ava_eps),
    		.eps = ava_eps },
    #endif
    #ifdef USE_ZTEX
    // This is here so cgminer -n shows them
    // the ztex driver (as at 201303) doesn't use usbutils
    	{
    		.drv = DRV_ZTEX,
    		.name = "ZTX",
    		.idVendor = 0x221a,
    		.idProduct = 0x0100,
    		.kernel = 0,
    		.config = 1,
    		.interface = 1,
    		.timeout = 100,
    		.epcount = 0,
    		.eps = NULL },
    #endif
    	{ DRV_LAST, NULL, 0, 0, 0, 0, 0, 0, 0, NULL }
    };
    
    #ifdef USE_BFLSC
    extern struct device_drv bflsc_drv;
    #endif
    
    #ifdef USE_BITFORCE
    extern struct device_drv bitforce_drv;
    #endif
    
    #ifdef USE_MODMINER
    extern struct device_drv modminer_drv;
    #endif
    
    #ifdef USE_ICARUS
    extern struct device_drv icarus_drv;
    #endif
    
    #ifdef USE_AVALON
    extern struct device_drv avalon_drv;
    #endif
    
    #define STRBUFLEN 256
    static const char *BLANK = "";
    static const char *space = " ";
    static const char *nodatareturned = "no data returned ";
    
    // For device limits by driver
    static struct driver_count {
    	uint32_t count;
    	uint32_t limit;
    } drv_count[DRIVER_MAX];
    
    // For device limits by list of bus/dev
    static struct usb_busdev {
    	int bus_number;
    	int device_address;
    } *busdev;
    
    static int busdev_count = 0;
    
    // Total device limit
    static int total_count = 0;
    static int total_limit = 999999;
    
    static bool stats_initialised = false;
    
    struct cg_usb_stats_item {
    	uint64_t count;
    	double total_delay;
    	double min_delay;
    	double max_delay;
    	struct timeval first;
    	struct timeval last;
    };
    
    #define CMD_CMD 0
    #define CMD_TIMEOUT 1
    #define CMD_ERROR 2
    
    struct cg_usb_stats_details {
    	int seq;
    	struct cg_usb_stats_item item[CMD_ERROR+1];
    };
    
    struct cg_usb_stats {
    	char *name;
    	int device_id;
    	struct cg_usb_stats_details *details;
    };
    
    #define SEQ0 0
    #define SEQ1 1
    
    static struct cg_usb_stats *usb_stats = NULL;
    static int next_stat = 0;
    
    static const char **usb_commands;
    
    static const char *C_REJECTED_S = "RejectedNoDevice";
    static const char *C_PING_S = "Ping";
    static const char *C_CLEAR_S = "Clear";
    static const char *C_REQUESTVERSION_S = "RequestVersion";
    static const char *C_GETVERSION_S = "GetVersion";
    static const char *C_REQUESTFPGACOUNT_S = "RequestFPGACount";
    static const char *C_GETFPGACOUNT_S = "GetFPGACount";
    static const char *C_STARTPROGRAM_S = "StartProgram";
    static const char *C_STARTPROGRAMSTATUS_S = "StartProgramStatus";
    static const char *C_PROGRAM_S = "Program";
    static const char *C_PROGRAMSTATUS_S = "ProgramStatus";
    static const char *C_PROGRAMSTATUS2_S = "ProgramStatus2";
    static const char *C_FINALPROGRAMSTATUS_S = "FinalProgramStatus";
    static const char *C_SETCLOCK_S = "SetClock";
    static const char *C_REPLYSETCLOCK_S = "ReplySetClock";
    static const char *C_REQUESTUSERCODE_S = "RequestUserCode";
    static const char *C_GETUSERCODE_S = "GetUserCode";
    static const char *C_REQUESTTEMPERATURE_S = "RequestTemperature";
    static const char *C_GETTEMPERATURE_S = "GetTemperature";
    static const char *C_SENDWORK_S = "SendWork";
    static const char *C_SENDWORKSTATUS_S = "SendWorkStatus";
    static const char *C_REQUESTWORKSTATUS_S = "RequestWorkStatus";
    static const char *C_GETWORKSTATUS_S = "GetWorkStatus";
    static const char *C_REQUESTIDENTIFY_S = "RequestIdentify";
    static const char *C_GETIDENTIFY_S = "GetIdentify";
    static const char *C_REQUESTFLASH_S = "RequestFlash";
    static const char *C_REQUESTSENDWORK_S = "RequestSendWork";
    static const char *C_REQUESTSENDWORKSTATUS_S = "RequestSendWorkStatus";
    static const char *C_RESET_S = "Reset";
    static const char *C_SETBAUD_S = "SetBaud";
    static const char *C_SETDATA_S = "SetDataCtrl";
    static const char *C_SETFLOW_S = "SetFlowCtrl";
    static const char *C_SETMODEM_S = "SetModemCtrl";
    static const char *C_PURGERX_S = "PurgeRx";
    static const char *C_PURGETX_S = "PurgeTx";
    static const char *C_FLASHREPLY_S = "FlashReply";
    static const char *C_REQUESTDETAILS_S = "RequestDetails";
    static const char *C_GETDETAILS_S = "GetDetails";
    static const char *C_REQUESTRESULTS_S = "RequestResults";
    static const char *C_GETRESULTS_S = "GetResults";
    static const char *C_REQUESTQUEJOB_S = "RequestQueJob";
    static const char *C_REQUESTQUEJOBSTATUS_S = "RequestQueJobStatus";
    static const char *C_QUEJOB_S = "QueJob";
    static const char *C_QUEJOBSTATUS_S = "QueJobStatus";
    static const char *C_QUEFLUSH_S = "QueFlush";
    static const char *C_QUEFLUSHREPLY_S = "QueFlushReply";
    
    #ifdef EOL
    #undef EOL
    #endif
    #define EOL "\n"
    
    static const char *DESDEV = "Device";
    static const char *DESCON = "Config";
    static const char *DESSTR = "String";
    static const char *DESINT = "Interface";
    static const char *DESEP = "Endpoint";
    static const char *DESHID = "HID";
    static const char *DESRPT = "Report";
    static const char *DESPHY = "Physical";
    static const char *DESHUB = "Hub";
    
    static const char *EPIN = "In: ";
    static const char *EPOUT = "Out: ";
    static const char *EPX = "?: ";
    
    static const char *CONTROL = "Control";
    static const char *ISOCHRONOUS_X = "Isochronous+?";
    static const char *ISOCHRONOUS_N_X = "Isochronous+None+?";
    static const char *ISOCHRONOUS_N_D = "Isochronous+None+Data";
    static const char *ISOCHRONOUS_N_F = "Isochronous+None+Feedback";
    static const char *ISOCHRONOUS_N_I = "Isochronous+None+Implicit";
    static const char *ISOCHRONOUS_A_X = "Isochronous+Async+?";
    static const char *ISOCHRONOUS_A_D = "Isochronous+Async+Data";
    static const char *ISOCHRONOUS_A_F = "Isochronous+Async+Feedback";
    static const char *ISOCHRONOUS_A_I = "Isochronous+Async+Implicit";
    static const char *ISOCHRONOUS_D_X = "Isochronous+Adaptive+?";
    static const char *ISOCHRONOUS_D_D = "Isochronous+Adaptive+Data";
    static const char *ISOCHRONOUS_D_F = "Isochronous+Adaptive+Feedback";
    static const char *ISOCHRONOUS_D_I = "Isochronous+Adaptive+Implicit";
    static const char *ISOCHRONOUS_S_X = "Isochronous+Sync+?";
    static const char *ISOCHRONOUS_S_D = "Isochronous+Sync+Data";
    static const char *ISOCHRONOUS_S_F = "Isochronous+Sync+Feedback";
    static const char *ISOCHRONOUS_S_I = "Isochronous+Sync+Implicit";
    static const char *BULK = "Bulk";
    static const char *INTERRUPT = "Interrupt";
    static const char *UNKNOWN = "Unknown";
    
    static const char *err_io_str = " IO Error";
    static const char *err_access_str = " Access Denied-a";
    static const char *err_timeout_str = " Reply Timeout";
    static const char *err_pipe_str = " Access denied-p";
    static const char *err_other_str = " Access denied-o";
    
    static const char *usberrstr(int err)
    {
    	switch (err) {
    		case LIBUSB_ERROR_IO:
    			return err_io_str;
    		case LIBUSB_ERROR_ACCESS:
    			return err_access_str;
    		case LIBUSB_ERROR_TIMEOUT:
    			return err_timeout_str;
    		case LIBUSB_ERROR_PIPE:
    			return err_pipe_str;
    		case LIBUSB_ERROR_OTHER:
    			return err_other_str;
    	}
    	return BLANK;
    }
    
    static const char *destype(uint8_t bDescriptorType)
    {
    	switch (bDescriptorType) {
    		case LIBUSB_DT_DEVICE:
    			return DESDEV;
    		case LIBUSB_DT_CONFIG:
    			return DESCON;
    		case LIBUSB_DT_STRING:
    			return DESSTR;
    		case LIBUSB_DT_INTERFACE:
    			return DESINT;
    		case LIBUSB_DT_ENDPOINT:
    			return DESEP;
    		case LIBUSB_DT_HID:
    			return DESHID;
    		case LIBUSB_DT_REPORT:
    			return DESRPT;
    		case LIBUSB_DT_PHYSICAL:
    			return DESPHY;
    		case LIBUSB_DT_HUB:
    			return DESHUB;
    	}
    	return UNKNOWN;
    }
    
    static const char *epdir(uint8_t bEndpointAddress)
    {
    	switch (bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK) {
    		case LIBUSB_ENDPOINT_IN:
    			return EPIN;
    		case LIBUSB_ENDPOINT_OUT:
    			return EPOUT;
    	}
    	return EPX;
    }
    
    static const char *epatt(uint8_t bmAttributes)
    {
    	switch(bmAttributes & LIBUSB_TRANSFER_TYPE_MASK) {
    		case LIBUSB_TRANSFER_TYPE_CONTROL:
    			return CONTROL;
    		case LIBUSB_TRANSFER_TYPE_BULK:
    			return BULK;
    		case LIBUSB_TRANSFER_TYPE_INTERRUPT:
    			return INTERRUPT;
    		case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
    			switch(bmAttributes & LIBUSB_ISO_SYNC_TYPE_MASK) {
    				case LIBUSB_ISO_SYNC_TYPE_NONE:
    					switch(bmAttributes & LIBUSB_ISO_USAGE_TYPE_MASK) {
    						case LIBUSB_ISO_USAGE_TYPE_DATA:
    							return ISOCHRONOUS_N_D;
    						case LIBUSB_ISO_USAGE_TYPE_FEEDBACK:
    							return ISOCHRONOUS_N_F;
    						case LIBUSB_ISO_USAGE_TYPE_IMPLICIT:
    							return ISOCHRONOUS_N_I;
    					}
    					return ISOCHRONOUS_N_X;
    				case LIBUSB_ISO_SYNC_TYPE_ASYNC:
    					switch(bmAttributes & LIBUSB_ISO_USAGE_TYPE_MASK) {
    						case LIBUSB_ISO_USAGE_TYPE_DATA:
    							return ISOCHRONOUS_A_D;
    						case LIBUSB_ISO_USAGE_TYPE_FEEDBACK:
    							return ISOCHRONOUS_A_F;
    						case LIBUSB_ISO_USAGE_TYPE_IMPLICIT:
    							return ISOCHRONOUS_A_I;
    					}
    					return ISOCHRONOUS_A_X;
    				case LIBUSB_ISO_SYNC_TYPE_ADAPTIVE:
    					switch(bmAttributes & LIBUSB_ISO_USAGE_TYPE_MASK) {
    						case LIBUSB_ISO_USAGE_TYPE_DATA:
    							return ISOCHRONOUS_D_D;
    						case LIBUSB_ISO_USAGE_TYPE_FEEDBACK:
    							return ISOCHRONOUS_D_F;
    						case LIBUSB_ISO_USAGE_TYPE_IMPLICIT:
    							return ISOCHRONOUS_D_I;
    					}
    					return ISOCHRONOUS_D_X;
    				case LIBUSB_ISO_SYNC_TYPE_SYNC:
    					switch(bmAttributes & LIBUSB_ISO_USAGE_TYPE_MASK) {
    						case LIBUSB_ISO_USAGE_TYPE_DATA:
    							return ISOCHRONOUS_S_D;
    						case LIBUSB_ISO_USAGE_TYPE_FEEDBACK:
    							return ISOCHRONOUS_S_F;
    						case LIBUSB_ISO_USAGE_TYPE_IMPLICIT:
    							return ISOCHRONOUS_S_I;
    					}
    					return ISOCHRONOUS_S_X;
    			}
    			return ISOCHRONOUS_X;
    	}
    
    	return UNKNOWN;
    }
    
    static void append(char **buf, char *append, size_t *off, size_t *len)
    {
    	int new = strlen(append);
    	if ((new + *off) >= *len)
    	{
    		*len *= 2;
    		*buf = realloc(*buf, *len);
    	}
    
    	strcpy(*buf + *off, append);
    	*off += new;
    }
    
    static bool setgetdes(ssize_t count, libusb_device *dev, struct libusb_device_handle *handle, struct libusb_config_descriptor **config, int cd, char **buf, size_t *off, size_t *len)
    {
    	char tmp[512];
    	int err;
    
    	err = libusb_set_configuration(handle, cd);
    	if (err) {
    		sprintf(tmp, EOL "  ** dev %d: Failed to set config descriptor to %d, err %d",
    				(int)count, cd, err);
    		append(buf, tmp, off, len);
    		return false;
    	}
    
    	err = libusb_get_active_config_descriptor(dev, config);
    	if (err) {
    		sprintf(tmp, EOL "  ** dev %d: Failed to get active config descriptor set to %d, err %d",
    				(int)count, cd, err);
    		append(buf, tmp, off, len);
    		return false;
    	}
    
    	sprintf(tmp, EOL "  ** dev %d: Set & Got active config descriptor to %d, err %d",
    			(int)count, cd, err);
    	append(buf, tmp, off, len);
    	return true;
    }
    
    static void usb_full(ssize_t *count, libusb_device *dev, char **buf, size_t *off, size_t *len, int level)
    {
    	struct libusb_device_descriptor desc;
    	uint8_t bus_number;
    	uint8_t device_address;
    	struct libusb_device_handle *handle;
    	struct libusb_config_descriptor *config;
    	const struct libusb_interface_descriptor *idesc;
    	const struct libusb_endpoint_descriptor *epdesc;
    	unsigned char man[STRBUFLEN+1];
    	unsigned char prod[STRBUFLEN+1];
    	unsigned char ser[STRBUFLEN+1];
    	char tmp[512];
    	int err, i, j, k;
    
    	err = libusb_get_device_descriptor(dev, &desc);
    	if (opt_usb_list_all && err) {
    		sprintf(tmp, EOL ".USB dev %d: Failed to get descriptor, err %d",
    					(int)(++(*count)), err);
    		append(buf, tmp, off, len);
    		return;
    	}
    
    	bus_number = libusb_get_bus_number(dev);
    	device_address = libusb_get_device_address(dev);
    
    	if (!opt_usb_list_all) {
    		bool known = false;
    
    		for (i = 0; find_dev[i].drv != DRV_LAST; i++)
    			if ((find_dev[i].idVendor == desc.idVendor) &&
    			    (find_dev[i].idProduct == desc.idProduct)) {
    				known = true;
    				break;
    			}
    
    		if (!known)
    			return;
    	}
    
    	(*count)++;
    
    	if (level == 0) {
    		sprintf(tmp, EOL ".USB dev %d: Bus %d Device %d ID: %04x:%04x",
    				(int)(*count), (int)bus_number, (int)device_address,
    				desc.idVendor, desc.idProduct);
    	} else {
    		sprintf(tmp, EOL ".USB dev %d: Bus %d Device %d Device Descriptor:" EOL "\tLength: %d" EOL
    			"\tDescriptor Type: %s" EOL "\tUSB: %04x" EOL "\tDeviceClass: %d" EOL
    			"\tDeviceSubClass: %d" EOL "\tDeviceProtocol: %d" EOL "\tMaxPacketSize0: %d" EOL
    			"\tidVendor: %04x" EOL "\tidProduct: %04x" EOL "\tDeviceRelease: %x" EOL
    			"\tNumConfigurations: %d",
    				(int)(*count), (int)bus_number, (int)device_address,
    				(int)(desc.bLength), destype(desc.bDescriptorType),
    				desc.bcdUSB, (int)(desc.bDeviceClass), (int)(desc.bDeviceSubClass),
    				(int)(desc.bDeviceProtocol), (int)(desc.bMaxPacketSize0),
    				desc.idVendor, desc.idProduct, desc.bcdDevice,
    				(int)(desc.bNumConfigurations));
    	}
    	append(buf, tmp, off, len);
    
    	err = libusb_open(dev, &handle);
    	if (err) {
    		sprintf(tmp, EOL "  ** dev %d: Failed to open, err %d", (int)(*count), err);
    		append(buf, tmp, off, len);
    		return;
    	}
    
    	err = libusb_get_string_descriptor_ascii(handle, desc.iManufacturer, man, STRBUFLEN);
    	if (err < 0)
    		sprintf((char *)man, "** err(%d)%s", err, usberrstr(err));
    
    	err = libusb_get_string_descriptor_ascii(handle, desc.iProduct, prod, STRBUFLEN);
    	if (err < 0)
    		sprintf((char *)prod, "** err(%d)%s", err, usberrstr(err));
    
    	if (level == 0) {
    		libusb_close(handle);
    		sprintf(tmp, EOL "  Manufacturer: '%s'" EOL "  Product: '%s'", man, prod);
    		append(buf, tmp, off, len);
    		return;
    	}
    
    	if (libusb_kernel_driver_active(handle, 0) == 1) {
    		sprintf(tmp, EOL "   * dev %d: kernel attached", (int)(*count));
    		append(buf, tmp, off, len);
    	}
    
    	err = libusb_get_active_config_descriptor(dev, &config);
    	if (err) {
    		if (!setgetdes(*count, dev, handle, &config, 1, buf, off, len)
    		&&  !setgetdes(*count, dev, handle, &config, 0, buf, off, len)) {
    			libusb_close(handle);
    			sprintf(tmp, EOL "  ** dev %d: Failed to set config descriptor to %d or %d",
    					(int)(*count), 1, 0);
    			append(buf, tmp, off, len);
    			return;
    		}
    	}
    
    	sprintf(tmp, EOL "     dev %d: Active Config:" EOL "\tDescriptorType: %s" EOL
    			"\tNumInterfaces: %d" EOL "\tConfigurationValue: %d" EOL
    			"\tAttributes: %d" EOL "\tMaxPower: %d",
    				(int)(*count), destype(config->bDescriptorType),
    				(int)(config->bNumInterfaces), (int)(config->iConfiguration),
    				(int)(config->bmAttributes), (int)(config->MaxPower));
    	append(buf, tmp, off, len);
    
    	for (i = 0; i < (int)(config->bNumInterfaces); i++) {
    		for (j = 0; j < config->interface[i].num_altsetting; j++) {
    			idesc = &(config->interface[i].altsetting[j]);
    
    			sprintf(tmp, EOL "     _dev %d: Interface Descriptor %d:" EOL
    					"\tDescriptorType: %s" EOL "\tInterfaceNumber: %d" EOL
    					"\tNumEndpoints: %d" EOL "\tInterfaceClass: %d" EOL
    					"\tInterfaceSubClass: %d" EOL "\tInterfaceProtocol: %d",
    						(int)(*count), j, destype(idesc->bDescriptorType),
    						(int)(idesc->bInterfaceNumber),
    						(int)(idesc->bNumEndpoints),
    						(int)(idesc->bInterfaceClass),
    						(int)(idesc->bInterfaceSubClass),
    						(int)(idesc->bInterfaceProtocol));
    			append(buf, tmp, off, len);
    
    			for (k = 0; k < (int)(idesc->bNumEndpoints); k++) {
    				epdesc = &(idesc->endpoint[k]);
    
    				sprintf(tmp, EOL "     __dev %d: Interface %d Endpoint %d:" EOL
    						"\tDescriptorType: %s" EOL
    						"\tEndpointAddress: %s0x%x" EOL
    						"\tAttributes: %s" EOL "\tMaxPacketSize: %d" EOL
    						"\tInterval: %d" EOL "\tRefresh: %d",
    							(int)(*count), (int)(idesc->bInterfaceNumber), k,
    							destype(epdesc->bDescriptorType),
    							epdir(epdesc->bEndpointAddress),
    							(int)(epdesc->bEndpointAddress),
    							epatt(epdesc->bmAttributes),
    							epdesc->wMaxPacketSize,
    							(int)(epdesc->bInterval),
    							(int)(epdesc->bRefresh));
    				append(buf, tmp, off, len);
    			}
    		}
    	}
    
    	libusb_free_config_descriptor(config);
    	config = NULL;
    
    	err = libusb_get_string_descriptor_ascii(handle, desc.iSerialNumber, ser, STRBUFLEN);
    	if (err < 0)
    		sprintf((char *)ser, "** err(%d)%s", err, usberrstr(err));
    
    	sprintf(tmp, EOL "     dev %d: More Info:" EOL "\tManufacturer: '%s'" EOL
    			"\tProduct: '%s'" EOL "\tSerial '%s'",
    				(int)(*count), man, prod, ser);
    	append(buf, tmp, off, len);
    
    	libusb_close(handle);
    }
    
    // Function to dump all USB devices
    void usb_all(int level)
    {
    	libusb_device **list;
    	ssize_t count, i, j;
    	char *buf;
    	size_t len, off;
    
    	count = libusb_get_device_list(NULL, &list);
    	if (count < 0) {
    		applog(LOG_ERR, "USB all: failed, err %d%s", (int)count, usberrstr((int)count));
    		return;
    	}
    
    	if (count == 0)
    		applog(LOG_WARNING, "USB all: found no devices");
    	else
    	{
    		len = 10000;
    		buf = malloc(len+1);
    
    		sprintf(buf, "USB all: found %d devices", (int)count);
    		off = strlen(buf);
    
    		if (!opt_usb_list_all)
    			append(&buf, " - listing known devices", &off, &len);
    
    		j = -1;
    		for (i = 0; i < count; i++)
    			usb_full(&j, list[i], &buf, &off, &len, level);
    
    		applog(LOG_WARNING, "%s", buf);
    
    		free(buf);
    
    		if (j == -1)
    			applog(LOG_WARNING, "No known USB devices");
    		else
    			applog(LOG_WARNING, "%d %sUSB devices",
    				(int)(++j), opt_usb_list_all ? BLANK : "known ");
    
    	}
    
    	libusb_free_device_list(list, 1);
    }
    
    static void cgusb_check_init()
    {
    	mutex_lock(&cgusb_lock);
    
    	if (stats_initialised == false) {
    		// N.B. environment LIBUSB_DEBUG also sets libusb_set_debug()
    		if (opt_usbdump >= 0) {
    			libusb_set_debug(NULL, opt_usbdump);
    			usb_all(opt_usbdump);
    		}
    
    		usb_commands = malloc(sizeof(*usb_commands) * C_MAX);
    
    		// use constants so the stat generation is very quick
    		// and the association between number and name can't
    		// be missalined easily
    		usb_commands[C_REJECTED] = C_REJECTED_S;
    		usb_commands[C_PING] = C_PING_S;
    		usb_commands[C_CLEAR] = C_CLEAR_S;
    		usb_commands[C_REQUESTVERSION] = C_REQUESTVERSION_S;
    		usb_commands[C_GETVERSION] = C_GETVERSION_S;
    		usb_commands[C_REQUESTFPGACOUNT] = C_REQUESTFPGACOUNT_S;
    		usb_commands[C_GETFPGACOUNT] = C_GETFPGACOUNT_S;
    		usb_commands[C_STARTPROGRAM] = C_STARTPROGRAM_S;
    		usb_commands[C_STARTPROGRAMSTATUS] = C_STARTPROGRAMSTATUS_S;
    		usb_commands[C_PROGRAM] = C_PROGRAM_S;
    		usb_commands[C_PROGRAMSTATUS] = C_PROGRAMSTATUS_S;
    		usb_commands[C_PROGRAMSTATUS2] = C_PROGRAMSTATUS2_S;
    		usb_commands[C_FINALPROGRAMSTATUS] = C_FINALPROGRAMSTATUS_S;
    		usb_commands[C_SETCLOCK] = C_SETCLOCK_S;
    		usb_commands[C_REPLYSETCLOCK] = C_REPLYSETCLOCK_S;
    		usb_commands[C_REQUESTUSERCODE] = C_REQUESTUSERCODE_S;
    		usb_commands[C_GETUSERCODE] = C_GETUSERCODE_S;
    		usb_commands[C_REQUESTTEMPERATURE] = C_REQUESTTEMPERATURE_S;
    		usb_commands[C_GETTEMPERATURE] = C_GETTEMPERATURE_S;
    		usb_commands[C_SENDWORK] = C_SENDWORK_S;
    		usb_commands[C_SENDWORKSTATUS] = C_SENDWORKSTATUS_S;
    		usb_commands[C_REQUESTWORKSTATUS] = C_REQUESTWORKSTATUS_S;
    		usb_commands[C_GETWORKSTATUS] = C_GETWORKSTATUS_S;
    		usb_commands[C_REQUESTIDENTIFY] = C_REQUESTIDENTIFY_S;
    		usb_commands[C_GETIDENTIFY] = C_GETIDENTIFY_S;
    		usb_commands[C_REQUESTFLASH] = C_REQUESTFLASH_S;
    		usb_commands[C_REQUESTSENDWORK] = C_REQUESTSENDWORK_S;
    		usb_commands[C_REQUESTSENDWORKSTATUS] = C_REQUESTSENDWORKSTATUS_S;
    		usb_commands[C_RESET] = C_RESET_S;
    		usb_commands[C_SETBAUD] = C_SETBAUD_S;
    		usb_commands[C_SETDATA] = C_SETDATA_S;
    		usb_commands[C_SETFLOW] = C_SETFLOW_S;
    		usb_commands[C_SETMODEM] = C_SETMODEM_S;
    		usb_commands[C_PURGERX] = C_PURGERX_S;
    		usb_commands[C_PURGETX] = C_PURGETX_S;
    		usb_commands[C_FLASHREPLY] = C_FLASHREPLY_S;
    		usb_commands[C_REQUESTDETAILS] = C_REQUESTDETAILS_S;
    		usb_commands[C_GETDETAILS] = C_GETDETAILS_S;
    		usb_commands[C_REQUESTRESULTS] = C_REQUESTRESULTS_S;
    		usb_commands[C_GETRESULTS] = C_GETRESULTS_S;
    		usb_commands[C_REQUESTQUEJOB] = C_REQUESTQUEJOB_S;
    		usb_commands[C_REQUESTQUEJOBSTATUS] = C_REQUESTQUEJOBSTATUS_S;
    		usb_commands[C_QUEJOB] = C_QUEJOB_S;
    		usb_commands[C_QUEJOBSTATUS] = C_QUEJOBSTATUS_S;
    		usb_commands[C_QUEFLUSH] = C_QUEFLUSH_S;
    		usb_commands[C_QUEFLUSHREPLY] = C_QUEFLUSHREPLY_S;
    
    		stats_initialised = true;
    	}
    
    	mutex_unlock(&cgusb_lock);
    }
    
    const char *usb_cmdname(enum usb_cmds cmd)
    {
    	cgusb_check_init();
    
    	return usb_commands[cmd];
    }
    
    void usb_applog(struct cgpu_info *cgpu, enum usb_cmds cmd, char *msg, int amount, int err)
    {
    	if (msg && !*msg)
    		msg = NULL;
    
    	if (!msg && amount == 0 && err == LIBUSB_SUCCESS)
    		msg = (char *)nodatareturned;
    
            applog(LOG_ERR, "%s%i: %s failed%s%s (err=%d amt%d)",
                            cgpu->drv->name, cgpu->device_id,
                            usb_cmdname(cmd),
                            msg ? space : BLANK, msg ? msg : BLANK,
                            err, amount);
    }
    
    #ifndef WIN32
    #include <errno.h>
    #include <unistd.h>
    #include <sys/types.h>
    #include <sys/ipc.h>
    #include <sys/sem.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>
    
    union semun {
    	int sem;
    	struct semid_ds *seminfo;
    	ushort *all;
    };
    #endif
    
    // Any errors should always be printed since they will rarely if ever occur
    // and thus it is best to always display them
    static bool cgminer_usb_lock_bd(struct device_drv *drv, uint8_t bus_number, uint8_t device_address)
    {
    #ifdef WIN32
    	struct cgpu_info *cgpu;
    	HANDLE usbMutex;
    	char name[64];
    	DWORD res;
    	int i;
    
    	sprintf(name, "cgminer-usb-%d-%d", (int)bus_number, (int)device_address);
    
    	usbMutex = CreateMutex(NULL, FALSE, name);
    	if (usbMutex == NULL) {
    		applog(LOG_ERR,
    			"MTX: %s USB failed to get '%s' err (%d)",
    			drv->dname, name, GetLastError());
    		return false;
    	}
    
    	res = WaitForSingleObject(usbMutex, 0);
    	switch(res) {
    		case WAIT_OBJECT_0:
    		case WAIT_ABANDONED:
    			// Am I using it already?
    			for (i = 0; i < total_devices; i++) {
    				cgpu = get_devices(i);
    				if (cgpu->usbinfo.bus_number == bus_number &&
    				    cgpu->usbinfo.device_address == device_address &&
    				    cgpu->usbinfo.nodev == false) {
    					if (ReleaseMutex(usbMutex)) {
    						applog(LOG_WARNING,
    							"MTX: %s USB can't get '%s' - device in use",
    							drv->dname, name);
    						goto fail;
    					}
    					applog(LOG_ERR,
    						"MTX: %s USB can't get '%s' - device in use - failure (%d)",
    						drv->dname, name, GetLastError());
    					goto fail;
    				}
    			}
    			return true;
    		case WAIT_TIMEOUT:
    			if (!hotplug_mode)
    				applog(LOG_WARNING,
    					"MTX: %s USB failed to get '%s' - device in use",
    					drv->dname, name);
    			goto fail;
    		case WAIT_FAILED:
    			applog(LOG_ERR,
    				"MTX: %s USB failed to get '%s' err (%d)",
    				drv->dname, name, GetLastError());
    			goto fail;
    		default:
    			applog(LOG_ERR,
    				"MTX: %s USB failed to get '%s' unknown reply (%d)",
    				drv->dname, name, res);
    			goto fail;
    	}
    
    	CloseHandle(usbMutex);
    	return true;
    fail:
    	CloseHandle(usbMutex);
    	return false;
    #else
    	struct semid_ds seminfo;
    	union semun opt;
    	char name[64];
    	key_t key;
    	int fd, sem, count;
    
    	sprintf(name, "/tmp/cgminer-usb-%d-%d", (int)bus_number, (int)device_address);
    	fd = open(name, O_CREAT|O_RDONLY, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
    	if (fd == -1) {
    		applog(LOG_ERR,
    			"SEM: %s USB open failed '%s' err (%d) %s",
    			drv->dname, name, errno, strerror(errno));
    		return false;
    	}
    	close(fd);
    	key = ftok(name, 'K');
    	sem = semget(key, 1, IPC_CREAT | IPC_EXCL | 438);
    	if (sem < 0) {
    		if (errno != EEXIST) {
    			applog(LOG_ERR,
    				"SEM: %s USB failed to get '%s' err (%d) %s",
    				drv->dname, name, errno, strerror(errno));
    			return false;
    		}
    
    		sem = semget(key, 1, 0);
    		if (sem < 0) {
    			applog(LOG_ERR,
    				"SEM: %s USB failed to access '%s' err (%d) %s",
    				drv->dname, name, errno, strerror(errno));
    			return false;
    		}
    
    		opt.seminfo = &seminfo;
    		count = 0;
    		while (++count) {
    			// Should NEVER take 100ms
    			if (count > 99) {
    				applog(LOG_ERR,
    					"SEM: %s USB timeout waiting for (%d) '%s'",
    					drv->dname, sem, name);
    				return false;
    			}
    			if (semctl(sem, 0, IPC_STAT, opt) == -1) {
    				applog(LOG_ERR,
    					"SEM: %s USB failed to wait for (%d) '%s' count %d err (%d) %s",
    					drv->dname, sem, name, count, errno, strerror(errno));
    				return false;
    			}
    			if (opt.seminfo->sem_otime != 0)
    				break;
    			nmsleep(1);
    		}
    	}
    
    	struct sembuf sops[] = {
    		{ 0, 0, IPC_NOWAIT | SEM_UNDO },
    		{ 0, 1, IPC_NOWAIT | SEM_UNDO }
    	};
    
    	if (semop(sem, sops, 2)) {
    		if (errno == EAGAIN) {
    			if (!hotplug_mode)
    				applog(LOG_WARNING,
    					"SEM: %s USB failed to get (%d) '%s' - device in use",
    					drv->dname, sem, name);
    		} else {
    			applog(LOG_DEBUG,
    				"SEM: %s USB failed to get (%d) '%s' err (%d) %s",
    				drv->dname, sem, name, errno, strerror(errno));
    		}
    		return false;
    	}
    
    	return true;
    #endif
    }
    
    static bool cgminer_usb_lock(struct device_drv *drv, libusb_device *dev)
    {
    	return cgminer_usb_lock_bd(drv, libusb_get_bus_number(dev), libusb_get_device_address(dev));
    }
    
    // Any errors should always be printed since they will rarely if ever occur
    // and thus it is best to always display them
    static void cgminer_usb_unlock_bd(struct device_drv *drv, uint8_t bus_number, uint8_t device_address)
    {
    #ifdef WIN32
    	HANDLE usbMutex;
    	char name[64];
    
    	sprintf(name, "cgminer-usb-%d-%d", (int)bus_number, (int)device_address);
    
    	usbMutex = CreateMutex(NULL, FALSE, name);
    	if (usbMutex == NULL) {
    		applog(LOG_ERR,
    			"MTX: %s USB failed to get '%s' for release err (%d)",
    			drv->dname, name, GetLastError());
    		return;
    	}
    
    	if (!ReleaseMutex(usbMutex))
    		applog(LOG_ERR,
    			"MTX: %s USB failed to release '%s' err (%d)",
    			drv->dname, name, GetLastError());
    
    	CloseHandle(usbMutex);
    	return;
    #else
    	char name[64];
    	key_t key;
    	int fd, sem;
    
    	sprintf(name, "/tmp/cgminer-usb-%d-%d", (int)bus_number, (int)device_address);
    	fd = open(name, O_CREAT|O_RDONLY, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
    	if (fd == -1) {
    		applog(LOG_ERR,
    			"SEM: %s USB open failed '%s' for release err (%d) %s",
    			drv->dname, name, errno, strerror(errno));
    		return;
    	}
    	close(fd);
    	key = ftok(name, 'K');
    
    	sem = semget(key, 1, 0);
    	if (sem < 0) {
    		applog(LOG_ERR,
    			"SEM: %s USB failed to get '%s' for release err (%d) %s",
    			drv->dname, name, errno, strerror(errno));
    		return;
    	}
    
    	struct sembuf sops[] = {
    		{ 0, -1, SEM_UNDO }
    	};
    
    	// Allow a 10ms timeout
    	// exceeding this timeout means it would probably never succeed anyway
    	struct timespec timeout = { 0, 10000000 };
    
    	// Wait forever since we shoud be the one who has it
    	if (semtimedop(sem, sops, 1, &timeout)) {
    		applog(LOG_ERR,
    			"SEM: %d USB failed to release '%s' err (%d) %s",
    			drv->dname, name, errno, strerror(errno));
    	}
    
    	return;
    #endif
    }
    
    static void cgminer_usb_unlock(struct device_drv *drv, libusb_device *dev)
    {
    	cgminer_usb_unlock_bd(drv, libusb_get_bus_number(dev), libusb_get_device_address(dev));
    }
    
    static struct cg_usb_device *free_cgusb(struct cg_usb_device *cgusb)
    {
    	if (cgusb->serial_string && cgusb->serial_string != BLANK)
    		free(cgusb->serial_string);
    
    	if (cgusb->manuf_string && cgusb->manuf_string != BLANK)
    		free(cgusb->manuf_string);
    
    	if (cgusb->prod_string && cgusb->prod_string != BLANK)
    		free(cgusb->prod_string);
    
    	free(cgusb->descriptor);
    
    	free(cgusb->found);
    
    	free(cgusb);
    
    	return NULL;
    }
    
    void usb_uninit(struct cgpu_info *cgpu)
    {
    	// May have happened already during a failed initialisation
    	//  if release_cgpu() was called due to a USB NODEV(err)
    	if (!cgpu->usbdev)
    		return;
    	libusb_release_interface(cgpu->usbdev->handle, cgpu->usbdev->found->interface);
    	libusb_close(cgpu->usbdev->handle);
    	cgpu->usbdev = free_cgusb(cgpu->usbdev);
    }
    
    static void release_cgpu(struct cgpu_info *cgpu)
    {
    	struct cg_usb_device *cgusb = cgpu->usbdev;
    	struct cgpu_info *lookcgpu;
    	int i;
    
    	// It has already been done
    	if (cgpu->usbinfo.nodev)
    		return;
    
    	total_count--;
    	drv_count[cgpu->drv->drv_id].count--;
    
    	cgpu->usbinfo.nodev = true;
    	cgpu->usbinfo.nodev_count++;
    	gettimeofday(&(cgpu->usbinfo.last_nodev), NULL);
    
    	// Any devices sharing the same USB device should be marked also
    	// Currently only MMQ shares a USB device
    	for (i = 0; i < total_devices; i++) {
    		lookcgpu = get_devices(i);
    		if (lookcgpu != cgpu && lookcgpu->usbdev == cgusb) {
    			total_count--;
    			drv_count[lookcgpu->drv->drv_id].count--;
    
    			lookcgpu->usbinfo.nodev = true;
    			lookcgpu->usbinfo.nodev_count++;
    			memcpy(&(lookcgpu->usbinfo.last_nodev),
    				&(cgpu->usbinfo.last_nodev), sizeof(struct timeval));
    			lookcgpu->usbdev = NULL;
    		}
    	}
    
    	usb_uninit(cgpu);
    
    	cgminer_usb_unlock_bd(cgpu->drv, cgpu->usbinfo.bus_number, cgpu->usbinfo.device_address);
    }
    
    bool usb_init(struct cgpu_info *cgpu, struct libusb_device *dev, struct usb_find_devices *found)
    {
    	struct cg_usb_device *cgusb = NULL;
    	struct libusb_config_descriptor *config = NULL;
    	const struct libusb_interface_descriptor *idesc;
    	const struct libusb_endpoint_descriptor *epdesc;
    	unsigned char strbuf[STRBUFLEN+1];
    	char devstr[STRBUFLEN+1];
    	int err, i, j, k;
    
    	cgpu->usbinfo.bus_number = libusb_get_bus_number(dev);
    	cgpu->usbinfo.device_address = libusb_get_device_address(dev);
    
    	sprintf(devstr, "- %s device %d:%d", found->name,
    		cgpu->usbinfo.bus_number, cgpu->usbinfo.device_address);
    
    	cgusb = calloc(1, sizeof(*cgusb));
    	cgusb->found = found;
    
    	cgusb->descriptor = calloc(1, sizeof(*(cgusb->descriptor)));
    
    	err = libusb_get_device_descriptor(dev, cgusb->descriptor);
    	if (err) {
    		applog(LOG_DEBUG,
    			"USB init failed to get descriptor, err %d %s",
    			err, devstr);
    		goto dame;
    	}
    
    	err = libusb_open(dev, &(cgusb->handle));
    	if (err) {
    		switch (err) {
    			case LIBUSB_ERROR_ACCESS:
    				applog(LOG_ERR,
    					"USB init open device failed, err %d, "
    					"you dont have priviledge to access %s",
    					err, devstr);
    				break;
    #ifdef WIN32
    			// Windows specific message
    			case LIBUSB_ERROR_NOT_SUPPORTED:
    				applog(LOG_ERR,
    					"USB init, open device failed, err %d, "
    					"you need to install a Windows USB driver for %s",
    					err, devstr);
    				break;
    #endif
    			default:
    				applog(LOG_DEBUG,
    					"USB init, open failed, err %d %s",
    					err, devstr);
    		}
    		goto dame;
    	}
    
    #ifndef WIN32
    	if (libusb_kernel_driver_active(cgusb->handle, found->kernel) == 1) {
    		applog(LOG_DEBUG, "USB init, kernel attached ... %s", devstr);
    		err = libusb_detach_kernel_driver(cgusb->handle, found->kernel);
    		if (err == 0) {
    			applog(LOG_DEBUG,
    				"USB init, kernel detached successfully %s",
    				devstr);
    		} else {
    			applog(LOG_WARNING,
    				"USB init, kernel detach failed, err %d in use? %s",
    				err, devstr);
    			goto cldame;
    		}
    	}
    #endif
    
    	err = libusb_set_configuration(cgusb->handle, found->config);
    	if (err) {
    		switch(err) {
    			case LIBUSB_ERROR_BUSY:
    				applog(LOG_WARNING,
    					"USB init, set config %d in use %s",
    					found->config, devstr);
    				break;
    			default:
    				applog(LOG_DEBUG,
    					"USB init, failed to set config to %d, err %d %s",
    					found->config, err, devstr);
    		}
    		goto cldame;
    	}
    
    	err = libusb_get_active_config_descriptor(dev, &config);
    	if (err) {
    		applog(LOG_DEBUG,
    			"USB init, failed to get config descriptor, err %d %s",
    			err, devstr);
    		goto cldame;
    	}
    
    	if ((int)(config->bNumInterfaces) <= found->interface)
    		goto cldame;
    
    	for (i = 0; i < found->epcount; i++)
    		found->eps[i].found = false;
    
    	for (i = 0; i < config->interface[found->interface].num_altsetting; i++) {
    		idesc = &(config->interface[found->interface].altsetting[i]);
    		for (j = 0; j < (int)(idesc->bNumEndpoints); j++) {
    			epdesc = &(idesc->endpoint[j]);
    			for (k = 0; k < found->epcount; k++) {
    				if (!found->eps[k].found) {
    					if (epdesc->bmAttributes == found->eps[k].att
    					&&  epdesc->wMaxPacketSize >= found->eps[k].size
    					&&  epdesc->bEndpointAddress == found->eps[k].ep) {
    						found->eps[k].found = true;
    						break;
    					}
    				}
    			}
    		}
    	}
    
    	for (i = 0; i < found->epcount; i++)
    		if (found->eps[i].found == false)
    			goto cldame;
    
    	err = libusb_claim_interface(cgusb->handle, found->interface);
    	if (err) {
    		switch(err) {
    			case LIBUSB_ERROR_BUSY:
    				applog(LOG_WARNING,
    					"USB init, claim interface %d in use %s",
    					found->interface, devstr);
    				break;
    			default:
    				applog(LOG_DEBUG,
    					"USB init, claim interface %d failed, err %d %s",
    					found->interface, err, devstr);
    		}
    		goto cldame;
    	}
    
    	cgusb->usbver = cgusb->descriptor->bcdUSB;
    
    // TODO: allow this with the right version of the libusb include and running library
    //	cgusb->speed = libusb_get_device_speed(dev);
    
    	err = libusb_get_string_descriptor_ascii(cgusb->handle,
    				cgusb->descriptor->iProduct, strbuf, STRBUFLEN);
    	if (err > 0)
    		cgusb->prod_string = strdup((char *)strbuf);
    	else
    		cgusb->prod_string = (char *)BLANK;
    
    	err = libusb_get_string_descriptor_ascii(cgusb->handle,
    				cgusb->descriptor->iManufacturer, strbuf, STRBUFLEN);
    	if (err > 0)
    		cgusb->manuf_string = strdup((char *)strbuf);
    	else
    		cgusb->manuf_string = (char *)BLANK;
    
    	err = libusb_get_string_descriptor_ascii(cgusb->handle,
    				cgusb->descriptor->iSerialNumber, strbuf, STRBUFLEN);
    	if (err > 0)
    		cgusb->serial_string = strdup((char *)strbuf);
    	else
    		cgusb->serial_string = (char *)BLANK;
    
    // TODO: ?
    //	cgusb->fwVersion <- for temp1/temp2 decision? or serial? (driver-modminer.c)
    //	cgusb->interfaceVersion
    
    	applog(LOG_DEBUG,
    		"USB init %s usbver=%04x prod='%s' manuf='%s' serial='%s'",
    		devstr, cgusb->usbver, cgusb->prod_string,
    		cgusb->manuf_string, cgusb->serial_string);
    
    	cgpu->usbdev = cgusb;
    
    	libusb_free_config_descriptor(config);
    
    	// Allow a name change based on the idVendor+idProduct
    	// N.B. must be done before calling add_cgpu()
    	if (strcmp(cgpu->drv->name, found->name)) {
    		if (!cgpu->drv->copy)
    			cgpu->drv = copy_drv(cgpu->drv);
    		cgpu->drv->name = (char *)(found->name);
    	}
    
    	return true;
    
    cldame:
    
    	libusb_close(cgusb->handle);
    
    dame:
    
    	if (config)
    		libusb_free_config_descriptor(config);
    
    	cgusb = free_cgusb(cgusb);
    
    	return false;
    }
    
    static bool usb_check_device(struct device_drv *drv, struct libusb_device *dev, struct usb_find_devices *look)
    {
    	struct libusb_device_descriptor desc;
    	int bus_number, device_address;
    	int err, i;
    	bool ok;
    
    	err = libusb_get_device_descriptor(dev, &desc);
    	if (err) {
    		applog(LOG_DEBUG, "USB check device: Failed to get descriptor, err %d", err);
    		return false;
    	}
    
    	if (desc.idVendor != look->idVendor || desc.idProduct != look->idProduct) {
    		applog(LOG_DEBUG, "%s looking for %s %04x:%04x but found %04x:%04x instead",
    			drv->name, look->name, look->idVendor, look->idProduct, desc.idVendor, desc.idProduct);
    
    		return false;
    	}
    
    	if (busdev_count > 0) {
    		bus_number = (int)libusb_get_bus_number(dev);
    		device_address = (int)libusb_get_device_address(dev);
    		ok = false;
    		for (i = 0; i < busdev_count; i++) {
    			if (bus_number == busdev[i].bus_number) {
    				if (busdev[i].device_address == -1 ||
    				    device_address == busdev[i].device_address) {
    					ok = true;
    					break;
    				}
    			}
    		}
    		if (!ok) {
    			applog(LOG_DEBUG, "%s rejected %s %04x:%04x with bus:dev (%d:%d)",
    				drv->name, look->name, look->idVendor, look->idProduct,
    				bus_number, device_address);
    			return false;
    		}
    	}
    
    	applog(LOG_DEBUG, "%s looking for and found %s %04x:%04x",
    		drv->name, look->name, look->idVendor, look->idProduct);
    
    	return true;
    }
    
    static struct usb_find_devices *usb_check_each(int drvnum, struct device_drv *drv, struct libusb_device *dev)
    {
    	struct usb_find_devices *found;
    	int i;
    
    	for (i = 0; find_dev[i].drv != DRV_LAST; i++)
    		if (find_dev[i].drv == drvnum) {
    			if (usb_check_device(drv, dev, &(find_dev[i]))) {
    				found = malloc(sizeof(*found));
    				memcpy(found, &(find_dev[i]), sizeof(*found));
    				return found;
    			}
    		}
    
    	return NULL;
    }
    
    static struct usb_find_devices *usb_check(__maybe_unused struct device_drv *drv, __maybe_unused struct libusb_device *dev)
    {
    	if (drv_count[drv->drv_id].count >= drv_count[drv->drv_id].limit) {
    		applog(LOG_DEBUG,
    			"USB scan devices3: %s limit %d reached",
    			drv->dname, drv_count[drv->drv_id].limit);
    		return NULL;
    	}
    
    #ifdef USE_BFLSC
    	if (drv->drv_id == DRIVER_BFLSC)
    		return usb_check_each(DRV_BFLSC, drv, dev);
    #endif
    
    #ifdef USE_BITFORCE
    	if (drv->drv_id == DRIVER_BITFORCE)
    		return usb_check_each(DRV_BITFORCE, drv, dev);
    #endif
    
    #ifdef USE_ICARUS
    	if (drv->drv_id == DRIVER_ICARUS)
    		return usb_check_each(DRV_ICARUS, drv, dev);
    #endif
    
    #ifdef USE_MODMINER
    	if (drv->drv_id == DRIVER_MODMINER)
    		return usb_check_each(DRV_MODMINER, drv, dev);
    #endif
    
    #ifdef USE_AVALON
    	if (drv->drv_id == DRIVER_AVALON)
    		return usb_check_each(DRV_AVALON, drv, dev);
    #endif
    
    	return NULL;
    }
    
    void usb_detect(struct device_drv *drv, bool (*device_detect)(struct libusb_device *, struct usb_find_devices *))
    {
    	libusb_device **list;
    	ssize_t count, i;
    	struct usb_find_devices *found;
    
    	applog(LOG_DEBUG, "USB scan devices: checking for %s devices", drv->name);
    
    	if (total_count >= total_limit) {
    		applog(LOG_DEBUG, "USB scan devices: total limit %d reached", total_limit);
    		return;
    	}
    
    	if (drv_count[drv->drv_id].count >= drv_count[drv->drv_id].limit) {
    		applog(LOG_DEBUG,
    			"USB scan devices: %s limit %d reached",
    			drv->dname, drv_count[drv->drv_id].limit);
    		return;
    	}
    
    	count = libusb_get_device_list(NULL, &list);
    	if (count < 0) {
    		applog(LOG_DEBUG, "USB scan devices: failed, err %d", count);
    		return;
    	}
    
    	if (count == 0)
    		applog(LOG_DEBUG, "USB scan devices: found no devices");
    
    	for (i = 0; i < count; i++) {
    		if (total_count >= total_limit) {
    			applog(LOG_DEBUG, "USB scan devices2: total limit %d reached", total_limit);
    			break;
    		}
    
    		if (drv_count[drv->drv_id].count >= drv_count[drv->drv_id].limit) {
    			applog(LOG_DEBUG,
    				"USB scan devices2: %s limit %d reached",
    				drv->dname, drv_count[drv->drv_id].limit);
    			break;
    		}
    
    		found = usb_check(drv, list[i]);
    		if (found != NULL) {
    			if (cgminer_usb_lock(drv, list[i]) == false)
    				free(found);
    			else {
    				if (!device_detect(list[i], found))
    					cgminer_usb_unlock(drv, list[i]);
    				else {
    					total_count++;
    					drv_count[drv->drv_id].count++;
    				}
    			}
    		}
    	}
    
    	libusb_free_device_list(list, 1);
    }
    
    // Set this to 0 to remove stats processing
    #define DO_USB_STATS 1
    
    #if DO_USB_STATS
    #define USB_STATS(sgpu, sta, fin, err, cmd, seq) stats(cgpu, sta, fin, err, cmd, seq)
    #define STATS_TIMEVAL(tv) gettimeofday(tv, NULL)
    #else
    #define USB_STATS(sgpu, sta, fin, err, cmd, seq)
    #define STATS_TIMEVAL(tv)
    #endif
    
    // The stat data can be spurious due to not locking it before copying it -
    // however that would require the stat() function to also lock and release
    // a mutex every time a usb read or write is called which would slow
    // things down more
    struct api_data *api_usb_stats(__maybe_unused int *count)
    {
    #if DO_USB_STATS
    	struct cg_usb_stats_details *details;
    	struct cg_usb_stats *sta;
    	struct api_data *root = NULL;
    	int device;
    	int cmdseq;
    
    	if (next_stat == 0)
    		return NULL;
    
    	while (*count < next_stat * C_MAX * 2) {
    		device = *count / (C_MAX * 2);
    		cmdseq = *count % (C_MAX * 2);
    
    		(*count)++;
    
    		sta = &(usb_stats[device]);
    		details = &(sta->details[cmdseq]);
    
    		// Only show stats that have results
    		if (details->item[CMD_CMD].count == 0 &&
    		    details->item[CMD_TIMEOUT].count == 0 &&
    		    details->item[CMD_ERROR].count == 0)
    			continue;
    
    		root = api_add_string(root, "Name", sta->name, false);
    		root = api_add_int(root, "ID", &(sta->device_id), false);
    		root = api_add_const(root, "Stat", usb_commands[cmdseq/2], false);
    		root = api_add_int(root, "Seq", &(details->seq), true);
    		root = api_add_uint64(root, "Count",
    					&(details->item[CMD_CMD].count), true);
    		root = api_add_double(root, "Total Delay",
    					&(details->item[CMD_CMD].total_delay), true);
    		root = api_add_double(root, "Min Delay",
    					&(details->item[CMD_CMD].min_delay), true);
    		root = api_add_double(root, "Max Delay",
    					&(details->item[CMD_CMD].max_delay), true);
    		root = api_add_uint64(root, "Timeout Count",
    					&(details->item[CMD_TIMEOUT].count), true);
    		root = api_add_double(root, "Timeout Total Delay",
    					&(details->item[CMD_TIMEOUT].total_delay), true);
    		root = api_add_double(root, "Timeout Min Delay",
    					&(details->item[CMD_TIMEOUT].min_delay), true);
    		root = api_add_double(root, "Timeout Max Delay",
    					&(details->item[CMD_TIMEOUT].max_delay), true);
    		root = api_add_uint64(root, "Error Count",
    					&(details->item[CMD_ERROR].count), true);
    		root = api_add_double(root, "Error Total Delay",
    					&(details->item[CMD_ERROR].total_delay), true);
    		root = api_add_double(root, "Error Min Delay",
    					&(details->item[CMD_ERROR].min_delay), true);
    		root = api_add_double(root, "Error Max Delay",
    					&(details->item[CMD_ERROR].max_delay), true);
    		root = api_add_timeval(root, "First Command",
    					&(details->item[CMD_CMD].first), true);
    		root = api_add_timeval(root, "Last Command",
    					&(details->item[CMD_CMD].last), true);
    		root = api_add_timeval(root, "First Timeout",
    					&(details->item[CMD_TIMEOUT].first), true);
    		root = api_add_timeval(root, "Last Timeout",
    					&(details->item[CMD_TIMEOUT].last), true);
    		root = api_add_timeval(root, "First Error",
    					&(details->item[CMD_ERROR].first), true);
    		root = api_add_timeval(root, "Last Error",
    					&(details->item[CMD_ERROR].last), true);
    
    		return root;
    	}
    #endif
    	return NULL;
    }
    
    #if DO_USB_STATS
    static void newstats(struct cgpu_info *cgpu)
    {
    	int i;
    
    	mutex_lock(&cgusb_lock);
    	cgpu->usbinfo.usbstat = ++next_stat;
    	mutex_unlock(&cgusb_lock);
    
    	usb_stats = realloc(usb_stats, sizeof(*usb_stats) * next_stat);
    
    	usb_stats[next_stat-1].name = cgpu->drv->name;
    	usb_stats[next_stat-1].device_id = -1;
    	usb_stats[next_stat-1].details = calloc(1, sizeof(struct cg_usb_stats_details) * C_MAX * 2);
    	for (i = 1; i < C_MAX * 2; i += 2)
    		usb_stats[next_stat-1].details[i].seq = 1;
    }
    #endif
    
    void update_usb_stats(__maybe_unused struct cgpu_info *cgpu)
    {
    #if DO_USB_STATS
    	if (cgpu->usbinfo.usbstat < 1)
    		newstats(cgpu);
    
    	// we don't know the device_id until after add_cgpu()
    	usb_stats[cgpu->usbinfo.usbstat - 1].device_id = cgpu->device_id;
    #endif
    }
    
    #if DO_USB_STATS
    static void stats(struct cgpu_info *cgpu, struct timeval *tv_start, struct timeval *tv_finish, int err, enum usb_cmds cmd, int seq)
    {
    	struct cg_usb_stats_details *details;
    	double diff;
    	int item;
    
    	if (cgpu->usbinfo.usbstat < 1)
    		newstats(cgpu);
    
    	details = &(usb_stats[cgpu->usbinfo.usbstat - 1].details[cmd * 2 + seq]);
    
    	diff = tdiff(tv_finish, tv_start);
    
    	switch (err) {
    		case LIBUSB_SUCCESS:
    			item = CMD_CMD;
    			break;
    		case LIBUSB_ERROR_TIMEOUT:
    			item = CMD_TIMEOUT;
    			break;
    		default:
    			item = CMD_ERROR;
    			break;
    	}
    
    	if (details->item[item].count == 0) {
    		details->item[item].min_delay = diff;
    		memcpy(&(details->item[item].first), tv_start, sizeof(*tv_start));
    	} else if (diff < details->item[item].min_delay)
    		details->item[item].min_delay = diff;
    
    	if (diff > details->item[item].max_delay)
    		details->item[item].max_delay = diff;
    
    	details->item[item].total_delay += diff;
    	memcpy(&(details->item[item].last), tv_start, sizeof(*tv_start));
    	details->item[item].count++;
    }
    
    static void rejected_inc(struct cgpu_info *cgpu)
    {
    	struct cg_usb_stats_details *details;
    	int item = CMD_ERROR;
    
    	if (cgpu->usbinfo.usbstat < 1)
    		newstats(cgpu);
    
    	details = &(usb_stats[cgpu->usbinfo.usbstat - 1].details[C_REJECTED * 2 + 0]);
    
    	details->item[item].count++;
    }
    #endif
    
    #define USB_MAX_READ 8192
    
    int _usb_read(struct cgpu_info *cgpu, int ep, char *buf, size_t bufsiz, int *processed, unsigned int timeout, const char *end, enum usb_cmds cmd, bool ftdi)
    {
    	struct cg_usb_device *usbdev = cgpu->usbdev;
    #if DO_USB_STATS
    	struct timeval tv_start;
    #endif
    	struct timeval read_start, tv_finish;
    	unsigned int initial_timeout;
    	double max, done;
    	int err, got, tot;
    	bool first = true;
    	unsigned char *search;
    	int endlen;
    
    	// We add 4: 1 for null, 2 for FTDI status and 1 to round to 4 bytes
    	unsigned char usbbuf[USB_MAX_READ+4], *ptr;
    	size_t usbbufread;
    
    	if (bufsiz > USB_MAX_READ)
    		quit(1, "%s USB read request %d too large (max=%d)", cgpu->drv->name, bufsiz, USB_MAX_READ);
    
    	if (cgpu->usbinfo.nodev) {
    		*buf = '\0';
    		*processed = 0;
    #if DO_USB_STATS
    		rejected_inc(cgpu);
    #endif
    		return LIBUSB_ERROR_NO_DEVICE;
    	}
    
    	if (timeout == DEVTIMEOUT)
    		timeout = usbdev->found->timeout;
    
    	if (end == NULL) {
    		if (ftdi)
    			usbbufread = bufsiz + 2;
    		else
    			usbbufread = bufsiz;
    		got = 0;
    		STATS_TIMEVAL(&tv_start);
    		err = libusb_bulk_transfer(usbdev->handle,
    				usbdev->found->eps[ep].ep,
    				usbbuf, usbbufread, &got, timeout);
    		STATS_TIMEVAL(&tv_finish);
    		USB_STATS(cgpu, &tv_start, &tv_finish, err, cmd, SEQ0);
    		usbbuf[got] = '\0';
    
    		if (ftdi) {
    			// first 2 bytes returned are an FTDI status
    			if (got > 2) {
    				got -= 2;
    				memmove(usbbuf, usbbuf+2, got+1);
    			} else {
    				got = 0;
    				usbbuf[0] = '\0';
    			}
    		}
    
    		*processed = got;
    		memcpy((char *)buf, (const char *)usbbuf, (got < (int)bufsiz) ? got + 1 : (int)bufsiz);
    
    		if (NODEV(err))
    			release_cgpu(cgpu);
    
    		return err;
    	}
    
    	tot = 0;
    	ptr = usbbuf;
    	endlen = strlen(end);
    	err = LIBUSB_SUCCESS;
    	initial_timeout = timeout;
    	max = ((double)timeout) / 1000.0;
    	gettimeofday(&read_start, NULL);
    	while (bufsiz) {
    		if (ftdi)
    			usbbufread = bufsiz + 2;
    		else
    			usbbufread = bufsiz;
    		got = 0;
    		STATS_TIMEVAL(&tv_start);
    		err = libusb_bulk_transfer(usbdev->handle,
    				usbdev->found->eps[ep].ep,
    				ptr, usbbufread, &got, timeout);
    		gettimeofday(&tv_finish, NULL);
    		USB_STATS(cgpu, &tv_start, &tv_finish, err, cmd, first ? SEQ0 : SEQ1);
    		ptr[got] = '\0';
    
    		if (ftdi) {
    			// first 2 bytes returned are an FTDI status
    			if (got > 2) {
    				got -= 2;
    				memmove(ptr, ptr+2, got+1);
    			} else {
    				got = 0;
    				*ptr = '\0';
    			}
    		}
    
    		tot += got;
    
    		if (err)
    			break;
    
    		// WARNING - this will return data past END ('if' there is extra data)
    		if (endlen <= tot) {
    			// If END is only 1 char - do a faster search
    			if (endlen == 1) {
    				if (strchr((char *)ptr, *end))
    					break;
    			} else {
    				// must allow END to have been chopped in 2 transfers
    				if ((tot - got) >= (endlen - 1))
    					search = ptr - (endlen - 1);
    				else
    					search = ptr - (tot - got);
    
    				if (strstr((char *)search, end))
    					break;
    			}
    		}
    
    		ptr += got;
    		bufsiz -= got;
    
    		first = false;
    
    		done = tdiff(&tv_finish, &read_start);
    		// N.B. this is return LIBUSB_SUCCESS with whatever size has already been read
    		if (unlikely(done >= max))
    			break;
    
    		timeout = initial_timeout - (done * 1000);
    	}
    
    	*processed = tot;
    	memcpy((char *)buf, (const char *)usbbuf, (tot < (int)bufsiz) ? tot + 1 : (int)bufsiz);
    
    	if (NODEV(err))
    		release_cgpu(cgpu);
    
    	return err;
    }
    
    int _usb_write(struct cgpu_info *cgpu, int ep, char *buf, size_t bufsiz, int *processed, unsigned int timeout, enum usb_cmds cmd)
    {
    	struct cg_usb_device *usbdev = cgpu->usbdev;
    #if DO_USB_STATS
    	struct timeval tv_start, tv_finish;
    #endif
    	int err, sent;
    
    	if (cgpu->usbinfo.nodev) {
    		*processed = 0;
    #if DO_USB_STATS
    		rejected_inc(cgpu);
    #endif
    		return LIBUSB_ERROR_NO_DEVICE;
    	}
    
    	sent = 0;
    	STATS_TIMEVAL(&tv_start);
    	err = libusb_bulk_transfer(usbdev->handle,
    			usbdev->found->eps[ep].ep,
    			(unsigned char *)buf,
    			bufsiz, &sent,
    			timeout == DEVTIMEOUT ? usbdev->found->timeout : timeout);
    	STATS_TIMEVAL(&tv_finish);
    	USB_STATS(cgpu, &tv_start, &tv_finish, err, cmd, SEQ0);
    
    	*processed = sent;
    
    	if (NODEV(err))
    		release_cgpu(cgpu);
    
    	return err;
    }
    
    int _usb_transfer(struct cgpu_info *cgpu, uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, unsigned int timeout, enum usb_cmds cmd)
    {
    	struct cg_usb_device *usbdev = cgpu->usbdev;
    #if DO_USB_STATS
    	struct timeval tv_start, tv_finish;
    #endif
    	int err;
    
    	if (cgpu->usbinfo.nodev) {
    #if DO_USB_STATS
    		rejected_inc(cgpu);
    #endif
    		return LIBUSB_ERROR_NO_DEVICE;
    	}
    
    	STATS_TIMEVAL(&tv_start);
    	err = libusb_control_transfer(usbdev->handle, request_type,
    		bRequest, wValue, wIndex, NULL, 0,
    		timeout == DEVTIMEOUT ? usbdev->found->timeout : timeout);
    	STATS_TIMEVAL(&tv_finish);
    	USB_STATS(cgpu, &tv_start, &tv_finish, err, cmd, SEQ0);
    
    	if (NODEV(err))
    		release_cgpu(cgpu);
    
    	return err;
    }
    
    void usb_cleanup()
    {
    	struct cgpu_info *cgpu;
    	int i;
    
    	hotplug_time = 0;
    
    	nmsleep(10);
    
    	for (i = 0; i < total_devices; i++) {
    		cgpu = devices[i];
    		switch (cgpu->drv->drv_id) {
    			case DRIVER_BFLSC:
    			case DRIVER_BITFORCE:
    			case DRIVER_MODMINER:
    			case DRIVER_AVALON:
    				release_cgpu(cgpu);
    				break;
    			default:
    				break;
    		}
    	}
    }
    
    void usb_initialise()
    {
    	char *fre, *ptr, *comma, *colon;
    	int bus, dev, lim, i;
    	bool found;
    
    	for (i = 0; i < DRIVER_MAX; i++) {
    		drv_count[i].count = 0;
    		drv_count[i].limit = 999999;
    	}
    
    	cgusb_check_init();
    
    	if (opt_usb_select && *opt_usb_select) {
    		// Absolute device limit
    		if (*opt_usb_select == ':') {
    			total_limit = atoi(opt_usb_select+1);
    			if (total_limit < 0)
    				quit(1, "Invalid --usb total limit");
    		// Comma list of bus:dev devices to match
    		} else if (isdigit(*opt_usb_select)) {
    			fre = ptr = strdup(opt_usb_select);
    			do {
    				comma = strchr(ptr, ',');
    				if (comma)
    					*(comma++) = '\0';
    
    				colon = strchr(ptr, ':');
    				if (!colon)
    					quit(1, "Invalid --usb bus:dev missing ':'");
    
    				*(colon++) = '\0';
    
    				if (!isdigit(*ptr))
    					quit(1, "Invalid --usb bus:dev - bus must be a number");
    
    				if (!isdigit(*colon) && *colon != '*')
    					quit(1, "Invalid --usb bus:dev - dev must be a number or '*'");
    
    				bus = atoi(ptr);
    				if (bus <= 0)
    					quit(1, "Invalid --usb bus:dev - bus must be > 0");
    
    				if (!colon == '*')
    					dev = -1;
    				else {
    					dev = atoi(colon);
    					if (dev <= 0)
    						quit(1, "Invalid --usb bus:dev - dev must be > 0 or '*'");
    				}
    
    				busdev = realloc(busdev, sizeof(*busdev) * (++busdev_count));
    
    				busdev[busdev_count-1].bus_number = bus;
    				busdev[busdev_count-1].device_address = dev;
    
    				ptr = comma;
    			} while (ptr);
    			free(fre);
    		// Comma list of DRV:limit
    		} else {
    			fre = ptr = strdup(opt_usb_select);
    			do {
    				comma = strchr(ptr, ',');
    				if (comma)
    					*(comma++) = '\0';
    
    				colon = strchr(ptr, ':');
    				if (!colon)
    					quit(1, "Invalid --usb DRV:limit missing ':'");
    
    				*(colon++) = '\0';
    
    				if (!isdigit(*colon))
    					quit(1, "Invalid --usb DRV:limit - limit must be a number");
    
    				lim = atoi(colon);
    				if (lim < 0)
    					quit(1, "Invalid --usb DRV:limit - limit must be >= 0");
    
    				found = false;
    #ifdef USE_BFLSC
    				if (strcasecmp(ptr, bflsc_drv.name) == 0) {
    					drv_count[bflsc_drv.drv_id].limit = lim;
    					found = true;
    				}
    #endif
    #ifdef USE_BITFORCE
    				if (!found && strcasecmp(ptr, bitforce_drv.name) == 0) {
    					drv_count[bitforce_drv.drv_id].limit = lim;
    					found = true;
    				}
    #endif
    #ifdef USE_MODMINER
    				if (!found && strcasecmp(ptr, modminer_drv.name) == 0) {
    					drv_count[modminer_drv.drv_id].limit = lim;
    					found = true;
    				}
    #endif
    #ifdef USE_AVALON
    				if (!found && strcasecmp(ptr, avalon_drv.name) == 0) {
    					drv_count[avalon_drv.drv_id].limit = lim;
    					found = true;
    				}
    #endif
    				if (!found)
    					quit(1, "Invalid --usb DRV:limit - unknown DRV='%s'", ptr);
    
    				ptr = comma;
    			} while (ptr);
    			free(fre);
    		}
    	}
    }