thodg/cgminer

diff --git a/cgminer.c b/cgminer.c
index 3d7dce3..036045a 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -1075,6 +1075,9 @@ static struct opt_table opt_config_table[] = {
 	OPT_WITH_ARG("--avalon-temp",
 		     set_int_0_to_100, opt_show_intval, &opt_avalon_temp,
 		     "Set avalon target temperature"),
+	OPT_WITH_ARG("--bitburner-voltage",
+		     opt_set_intval, NULL, &opt_bitburner_core_voltage,
+		     "Set ASIC core voltage (for BitBurner boards only), in millivolts"),
 #endif
 	OPT_WITHOUT_ARG("--load-balance",
 		     set_loadbalance, &pool_strategy,
diff --git a/driver-avalon.c b/driver-avalon.c
index 57eae78..b8e5703 100644
--- a/driver-avalon.c
+++ b/driver-avalon.c
@@ -46,11 +46,17 @@ int opt_avalon_fan_min = AVALON_DEFAULT_FAN_MIN_PWM;
 int opt_avalon_fan_max = AVALON_DEFAULT_FAN_MAX_PWM;
 int opt_avalon_freq_min = AVALON_MIN_FREQUENCY;
 int opt_avalon_freq_max = AVALON_MAX_FREQUENCY;
+int opt_bitburner_core_voltage = BITBURNER_DEFAULT_CORE_VOLTAGE;
 bool opt_avalon_auto;
 
 static int option_offset = -1;
 struct device_drv avalon_drv;
 
+static int avalon_is_bitburner(struct cgpu_info *avalon)
+{
+	return strcmp(avalon->drv->name, "BTB") == 0;
+}
+
 static int avalon_init_task(struct avalon_task *at,
 			    uint8_t reset, uint8_t ff, uint8_t fan,
 			    uint8_t timeout, uint8_t asic_num,
@@ -291,7 +297,7 @@ static int avalon_reset(struct cgpu_info *avalon, bool initial)
 		return -1;
 
 	if (!initial) {
-		applog(LOG_ERR, "AVA%d reset sequence sent", avalon->device_id);
+		applog(LOG_ERR, "%s%d reset sequence sent", avalon->drv->name, avalon->device_id);
 		return 0;
 	}
 
@@ -308,7 +314,7 @@ static int avalon_reset(struct cgpu_info *avalon, bool initial)
 	spare = ret - 10;
 	buf = tmp = (uint8_t *)&ar;
 	if (opt_debug) {
-		applog(LOG_DEBUG, "AVA%d reset: get:", avalon->device_id);
+		applog(LOG_DEBUG, "%s%d reset: get:", avalon->drv->name, avalon->device_id);
 		hexdump(tmp, AVALON_READ_SIZE);
 	}
 
@@ -327,13 +333,13 @@ static int avalon_reset(struct cgpu_info *avalon, bool initial)
 	}
 
 	if (i != 11) {
-		applog(LOG_ERR, "AVA%d: Reset failed! not an Avalon?"
-		       " (%d: %02x %02x %02x %02x)", avalon->device_id,
+		applog(LOG_ERR, "%s%d: Reset failed! not an Avalon?"
+		       " (%d: %02x %02x %02x %02x)", avalon->drv->name, avalon->device_id,
 		       i, buf[0], buf[1], buf[2], buf[3]);
 		/* FIXME: return 1; */
 	} else
-		applog(LOG_WARNING, "AVA%d: Reset succeeded",
-		       avalon->device_id);
+		applog(LOG_WARNING, "%s%d: Reset succeeded",
+		       avalon->drv->name, avalon->device_id);
 
 	return 0;
 }
@@ -509,7 +515,7 @@ static void avalon_idle(struct cgpu_info *avalon, struct avalon_info *info)
 				 info->frequency);
 		avalon_send_task(&at, avalon);
 	}
-	applog(LOG_WARNING, "AVA%i: Idling %d miners", avalon->device_id, i);
+	applog(LOG_WARNING, "%s%i: Idling %d miners", avalon->drv->name, avalon->device_id, i);
 	wait_avalon_ready(avalon);
 }
 
@@ -601,6 +607,49 @@ static void avalon_initialise(struct cgpu_info *avalon)
 		avalon->drv->name, avalon->device_id, err);
 }
 
+static void bitburner_set_core_voltage(struct cgpu_info *avalon, int core_voltage)
+{
+	uint8_t buf[2];
+	int err;
+
+	if (avalon_is_bitburner(avalon)) {
+		buf[0] = (uint8_t)core_voltage;
+		buf[1] = (uint8_t)(core_voltage >> 8);
+		err = usb_transfer_data(avalon, FTDI_TYPE_OUT, BITBURNER_REQUEST,
+				BITBURNER_VALUE, BITBURNER_INDEX_SET_VOLTAGE,
+				(uint32_t *)buf, sizeof(buf), C_BB_SET_VOLTAGE);
+		if (unlikely(err < 0)) {
+			applog(LOG_ERR, "%s%i: SetCoreVoltage failed: err = %d",
+				avalon->drv->name, avalon->device_id, err);
+		} else {
+			applog(LOG_WARNING, "%s%i: Core voltage set to %d millivolts",
+				avalon->drv->name, avalon->device_id,
+				core_voltage);
+		}
+	}
+}
+
+static int bitburner_get_core_voltage(struct cgpu_info *avalon)
+{
+	uint8_t buf[2];
+	int err;
+	int amount;
+
+	if (avalon_is_bitburner(avalon)) {
+		err = usb_transfer_read(avalon, FTDI_TYPE_IN, BITBURNER_REQUEST,
+				BITBURNER_VALUE, BITBURNER_INDEX_GET_VOLTAGE,
+				(char *)buf, sizeof(buf), &amount,
+				C_BB_GET_VOLTAGE);
+		if (unlikely(err != 0 || amount != 2)) {
+			applog(LOG_ERR, "%s%i: GetCoreVoltage failed: err = %d, amount = %d",
+				avalon->drv->name, avalon->device_id, err, amount);
+			return 0;
+		} else {
+			return (int)(buf[0] + ((unsigned int)buf[1] << 8));
+		}
+	}
+}
+
 static bool avalon_detect_one(libusb_device *dev, struct usb_find_devices *found)
 {
 	int baud, miner_count, asic_count, timeout, frequency = 0;
@@ -672,6 +721,10 @@ static bool avalon_detect_one(libusb_device *dev, struct usb_find_devices *found
 	       avalon->device_path, info->miner_count, info->asic_count, info->timeout,
 	       info->frequency);
 
+	if (avalon_is_bitburner(avalon) &&
+	    opt_bitburner_core_voltage != BITBURNER_DEFAULT_CORE_VOLTAGE)
+		bitburner_set_core_voltage(avalon, opt_bitburner_core_voltage);
+
 	return true;
 
 unshin:
@@ -908,8 +961,8 @@ static void *avalon_send_tasks(void *userdata)
 			if (!info->optimal) {
 				if (info->fan_pwm >= opt_avalon_fan_max) {
 					applog(LOG_WARNING,
-					       "AVA%i: Above optimal temperature, throttling",
-					       avalon->device_id);
+					       "%s%i: Above optimal temperature, throttling",
+					       avalon->drv->name, avalon->device_id);
 					avalon_dec_freq(info);
 				}
 			} else if (info->auto_nonces >= (AVALON_AUTO_CYCLE * 19 / 20) &&
@@ -932,8 +985,8 @@ static void *avalon_send_tasks(void *userdata)
 		for (i = start_count, j = 0; i < end_count; i++, j++) {
 			if (avalon_buffer_full(avalon)) {
 				applog(LOG_INFO,
-				       "AVA%i: Buffer full after only %d of %d work queued",
-					avalon->device_id, j, avalon_get_work_count);
+				       "%s%i: Buffer full after only %d of %d work queued",
+					avalon->drv->name, avalon->device_id, j, avalon_get_work_count);
 				break;
 			}
 
@@ -961,8 +1014,8 @@ static void *avalon_send_tasks(void *userdata)
 			ret = avalon_send_task(&at, avalon);
 
 			if (unlikely(ret == AVA_SEND_ERROR)) {
-				applog(LOG_ERR, "AVA%i: Comms error(buffer)",
-				       avalon->device_id);
+				applog(LOG_ERR, "%s%i: Comms error(buffer)",
+				       avalon->drv->name, avalon->device_id);
 				dev_error(avalon, REASON_DEV_COMMS_ERROR);
 				info->reset = true;
 				break;
@@ -974,8 +1027,8 @@ static void *avalon_send_tasks(void *userdata)
 		mutex_unlock(&info->qlock);
 
 		if (unlikely(idled)) {
-			applog(LOG_WARNING, "AVA%i: Idled %d miners",
-			       avalon->device_id, idled);
+			applog(LOG_WARNING, "%s%i: Idled %d miners",
+			       avalon->drv->name, avalon->device_id, idled);
 		}
 	}
 	return NULL;
@@ -1129,16 +1182,19 @@ static void avalon_update_temps(struct cgpu_info *avalon, struct avalon_info *in
 	info->temp_sum += avalon->temp;
 	applog(LOG_DEBUG, "Avalon: temp_index: %d, temp_count: %d, temp_old: %d",
 		info->temp_history_index, info->temp_history_count, info->temp_old);
+	if (avalon_is_bitburner(avalon)) {
+		info->core_voltage = bitburner_get_core_voltage(avalon);
+	}
 	if (info->temp_history_index == info->temp_history_count) {
 		adjust_fan(info);
 		info->temp_history_index = 0;
 		info->temp_sum = 0;
 	}
 	if (unlikely(info->temp_old >= opt_avalon_overheat)) {
-		applog(LOG_WARNING, "AVA%d overheat! Idling", avalon->device_id);
+		applog(LOG_WARNING, "%s%d overheat! Idling", avalon->drv->name, avalon->device_id);
 		info->overheat = true;
 	} else if (info->overheat && info->temp_old <= opt_avalon_temp) {
-		applog(LOG_WARNING, "AVA%d cooled, restarting", avalon->device_id);
+		applog(LOG_WARNING, "%s%d cooled, restarting", avalon->drv->name, avalon->device_id);
 		info->overheat = false;
 	}
 }
@@ -1148,13 +1204,17 @@ static void get_avalon_statline_before(char *buf, size_t bufsiz, struct cgpu_inf
 	struct avalon_info *info = avalon->device_data;
 	int lowfan = 10000;
 
-	/* Find the lowest fan speed of the ASIC cooling fans. */
-	if (info->fan1 >= 0 && info->fan1 < lowfan)
-		lowfan = info->fan1;
-	if (info->fan2 >= 0 && info->fan2 < lowfan)
-		lowfan = info->fan2;
+	if (avalon_is_bitburner(avalon)) {
+		tailsprintf(buf, bufsiz, "%2d/%3dC %4dmV | ", info->temp0, info->temp2, info->core_voltage);
+	} else {
+		/* Find the lowest fan speed of the ASIC cooling fans. */
+		if (info->fan1 >= 0 && info->fan1 < lowfan)
+			lowfan = info->fan1;
+		if (info->fan2 >= 0 && info->fan2 < lowfan)
+			lowfan = info->fan2;
 
-	tailsprintf(buf, bufsiz, "%2d/%3dC %04dR | ", info->temp0, info->temp2, lowfan);
+		tailsprintf(buf, bufsiz, "%2d/%3dC %04dR | ", info->temp0, info->temp2, lowfan);
+	}
 }
 
 /* We use a replacement algorithm to only remove references to work done from
@@ -1231,15 +1291,17 @@ static int64_t avalon_scanhash(struct thr_info *thr)
 
 	/* Check for nothing but consecutive bad results or consistently less
 	 * results than we should be getting and reset the FPGA if necessary */
-	if (avalon->results < -miner_count && !info->reset) {
-		applog(LOG_ERR, "AVA%d: Result return rate low, resetting!",
-			avalon->device_id);
-		info->reset = true;
+	if (!avalon_is_bitburner(avalon)) {
+		if (avalon->results < -miner_count && !info->reset) {
+			applog(LOG_ERR, "%s%d: Result return rate low, resetting!",
+				avalon->drv->name, avalon->device_id);
+			info->reset = true;
+		}
 	}
 
 	if (unlikely(avalon->usbinfo.nodev)) {
-		applog(LOG_ERR, "AVA%d: Device disappeared, shutting down thread",
-		       avalon->device_id);
+		applog(LOG_ERR, "%s%d: Device disappeared, shutting down thread",
+		       avalon->drv->name, avalon->device_id);
 		avalon->shutdown = true;
 	}
 
@@ -1279,6 +1341,8 @@ static struct api_data *avalon_api_stats(struct cgpu_info *cgpu)
 	root = api_add_int(root, "temp3", &(info->temp2), false);
 	root = api_add_int(root, "temp_max", &(info->temp_max), false);
 
+	root = api_add_int(root, "core_voltage", &(info->core_voltage), false);
+
 	root = api_add_int(root, "no_matching_work", &(info->no_matching_work), false);
 	for (i = 0; i < info->miner_count; i++) {
 		char mcw[24];
diff --git a/driver-avalon.h b/driver-avalon.h
index 4202c06..4b08098 100644
--- a/driver-avalon.h
+++ b/driver-avalon.h
@@ -33,6 +33,8 @@
 #define AVALON_TEMP_HYSTERESIS 3
 #define AVALON_TEMP_OVERHEAT 60
 
+#define BITBURNER_DEFAULT_CORE_VOLTAGE 1200 /* in millivolts */
+
 #define AVALON_DEFAULT_TIMEOUT 0x2D
 #define AVALON_MIN_FREQUENCY 256
 #define AVALON_MAX_FREQUENCY 450
@@ -113,6 +115,8 @@ struct avalon_info {
 	int temp_old;
 	int fan_pwm;
 
+	int core_voltage;
+
 	int no_matching_work;
 	int matching_work[AVALON_DEFAULT_MINER_NUM];
 
@@ -161,6 +165,7 @@ extern int opt_avalon_fan_max;
 extern int opt_avalon_freq_min;
 extern int opt_avalon_freq_max;
 extern bool opt_avalon_auto;
+extern int opt_bitburner_core_voltage;
 extern char *set_avalon_fan(char *arg);
 extern char *set_avalon_freq(char *arg);
 
diff --git a/usbutils.c b/usbutils.c
index a0dbbe3..1dc5843 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -192,6 +192,21 @@ static struct usb_find_devices find_dev[] = {
 #ifdef USE_AVALON
 	{
 		.drv = DRV_AVALON,
+		.name = "BTB",
+		.ident = IDENT_BTB,
+		.idVendor = IDVENDOR_FTDI,
+		.idProduct = 0x6001,
+		.iManufacturer = "Burnin Electronics",
+		.iProduct = "BitBurner",
+		.kernel = 0,
+		.config = 1,
+		.interface = 0,
+		.timeout = AVALON_TIMEOUT_MS,
+		.latency = 10,
+		.epcount = ARRAY_SIZE(ava_eps),
+		.eps = ava_eps },
+	{
+		.drv = DRV_AVALON,
 		.name = "AVA",
 		.ident = IDENT_AVA,
 		.idVendor = IDVENDOR_FTDI,
@@ -535,6 +550,8 @@ static const char *C_AVALON_RESET_S = "AvalonReset";
 static const char *C_GET_AVALON_RESET_S = "GetAvalonReset";
 static const char *C_FTDI_STATUS_S = "FTDIStatus";
 static const char *C_ENABLE_UART_S = "EnableUART";
+static const char *C_BB_SET_VOLTAGE_S = "SetCoreVoltage";
+static const char *C_BB_GET_VOLTAGE_S = "GetCoreVoltage";
 
 #ifdef EOL
 #undef EOL
@@ -1023,6 +1040,8 @@ static void cgusb_check_init()
 		usb_commands[C_GET_AVALON_RESET] = C_GET_AVALON_RESET_S;
 		usb_commands[C_FTDI_STATUS] = C_FTDI_STATUS_S;
 		usb_commands[C_ENABLE_UART] = C_ENABLE_UART_S;
+		usb_commands[C_BB_SET_VOLTAGE] = C_BB_SET_VOLTAGE_S;
+		usb_commands[C_BB_GET_VOLTAGE] = C_BB_GET_VOLTAGE_S;
 
 		stats_initialised = true;
 	}
diff --git a/usbutils.h b/usbutils.h
index cc85577..b14709c 100644
--- a/usbutils.h
+++ b/usbutils.h
@@ -48,6 +48,12 @@
 
 #define FTDI_VALUE_DATA_AVA 8
 
+// BitBurner
+#define BITBURNER_REQUEST ((uint8_t)0x42)
+#define BITBURNER_VALUE 0x4242
+#define BITBURNER_INDEX_SET_VOLTAGE 1
+#define BITBURNER_INDEX_GET_VOLTAGE 2
+
 // CMR = 115200 & 57600
 #define FTDI_VALUE_BAUD_CMR_115 0xc068
 #define FTDI_INDEX_BAUD_CMR_115 0x0200
@@ -121,6 +127,7 @@ enum sub_ident {
 	IDENT_BFL,
 	IDENT_MMQ,
 	IDENT_AVA,
+	IDENT_BTB,
 	IDENT_ICA,
 	IDENT_AMU,
 	IDENT_BLT,
@@ -304,6 +311,8 @@ enum usb_cmds {
 	C_GET_AVALON_RESET,
 	C_FTDI_STATUS,
 	C_ENABLE_UART,
+	C_BB_SET_VOLTAGE,
+	C_BB_GET_VOLTAGE,
 	C_MAX
 };