widget-control.c

/* -*- mode: c; tab-width: 4; c-basic-offset: 4 -*- */
/*
** simple command line program to control SDRWidget features,
** as defined in src/features.h
**
** todo - make sure we don't try to print or set features
** if the feature_major or feature_minor is different from
** the one we were compiled with, since that would have
** very unpredictable effects.
*/
const char usage[] = {
	"usage: sudo ./widget-control [options] [values]\n"
	"options: -a = list the devices connected and their serialIds.\n"
	"         -d = print the default feature values.\n"
	//	"         -f = factory reset to image default values;\n"
	//	"           doesn't perform a reset, just marks the features\n"
	//	"           to be restored to original values on next reset.\n"
	"         -g = get the feature values from the widget nvram.\n"
	"         -l = list the possible feature values.\n"
	"         -m = get the feature values from the widget ram.\n"
	"         -r = reboot the widget.\n"
//	"         -s = set the feature values in the widget nvram.\n"
	"         -f <feature name> <feature value> set a feature to a value\n"
	"         -u <serialId> = open the device with the specified serialId.\n"
	"         -p = erase flash and reboot into DFU\n"
//	"The -s option takes values in the form printed by -d or -g or -m.\n"
	"The acceptable values for each feature are listed by -l.\n"
	"The major and minor version numbers are optional to -s, but\n"
	"if provided they must match the ones printed by -d, -g, -l, and -m,\n"
	"which should all match each other\n"
	"The -u option takes one value which is the serialId of the device you\n"
	"want to program.\n"
}; 

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libusb-1.0/libusb.h>
#include "src/features.h"

int verbose = 0;

/*
** features
*/
#define true_feature_major_index 0
#define true_feature_minor_index 1
int true_feature_end_index;
int true_feature_end_values;

// features_t features_default = { FEATURES_DEFAULT };
uint8_t *true_features_default;
//features_t features_nvram;
uint8_t *true_features_nvram;
//features_t features_mem;
uint8_t *true_features_mem;
//char *feature_index_names[] = { FEATURE_INDEX_NAMES };
char **true_feature_index_names;
//char *feature_value_names[] = { FEATURE_VALUE_NAMES };
char **true_feature_value_names;
//int feature_first_value[feature_end_index];
int *feature_first_value;
// int feature_last_value[feature_end_index];
int *feature_last_value;

void feature_first_and_last_init(void) {
	int i, j;
	feature_first_value[true_feature_major_index] = -1;
	feature_first_value[true_feature_minor_index] = -1;
	feature_last_value[true_feature_major_index] = -1;
	feature_last_value[true_feature_minor_index] = -1;
	if (true_feature_minor_index+1 < true_feature_end_index) { 
		feature_first_value[true_feature_minor_index+1] = 0;
		for (i = true_feature_minor_index+1; i < true_feature_end_index; i += 1) {
			for (j = feature_first_value[i]; j < true_feature_end_values && strcmp(true_feature_value_names[j], "end") != 0; j += 1);
			feature_last_value[i] = j-1;
			feature_first_value[i+1] = j+1;
		}
	}
}

int first_value(int index) {
	if (index > true_feature_minor_index && index < true_feature_end_index)
		return feature_first_value[index];
	return -1;
}

int last_value(int index) {
	if (index > true_feature_minor_index && index < true_feature_end_index)
		return feature_last_value[index];
	return -1;
}

int find_feature_value(int index, char *value) {
	int i;
	for (i = first_value(index); i <= last_value(index); i += 1)
		if (strcmp(true_feature_value_names[i], value) == 0)
			return i;
	return -1;
}

/*
** usb
*/
#define REQDIR_HOSTTODEVICE		(0 << 7)
#define REQDIR_DEVICETOHOST		(1 << 7)
#define REQTYPE_STANDARD		(0 << 5)
#define REQTYPE_CLASS			(1 << 5)
#define REQTYPE_VENDOR			(2 << 5)
#define REQREC_DEVICE			(0 << 0)
#define REQREC_INTERFACE		(1 << 0)
#define REQREC_ENDPOINT			(2 << 0)
#define REQREC_OTHER			(3 << 0)

#define WIDGET_RESET			0x0f
#define WIDGET_DFU			0x0e

#define DG8SAQ_VENDOR_ID	  0x16c0		//!  DG8SAQ device
#define DG8SAQ_PRODUCT_ID     0x05dc
#define AUDIO_VENDOR_ID		  0x16c0		//!  Internal Lab use
#define AUDIO_VENDOR_ID_3	  0x16d0
#define AUDIO_VENDOR_ID_4	  0x1209	// NBSDAC
#define AUDIO_PRODUCT_ID      0x03e8
#define AUDIO_PRODUCT_ID_UAC1 0x03e9        // BSB 20120426
#define HPSDR_VENDOR_ID       0xfffe		//! Ozy Device
#define HPSDR_PRODUCT_ID      0x0007
#define AUDIO_PRODUCT_ID_4	  0x0761		//!vendorid3 SDR-Widget UAC1
#define AUDIO_PRODUCT_ID_5	  0X0762		//!vendorid3 SDR-Widget UAC2
#define AUDIO_PRODUCT_ID_6	  0x0763 		//!vendorid3 USB9023 UAC1
#define AUDIO_PRODUCT_ID_7	  0x0764 		//!vendorid3 USB9023 UAC2
#define AUDIO_PRODUCT_ID_8 	  0x0765 		//!vendorid3 USB5102 UAC1
#define AUDIO_PRODUCT_ID_9	  0x0766 		//!vendorid3 USB5102 UAC2
#define AUDIO_PRODUCT_ID_10	  0x0767 		//!vendorid3 USB8741 UAC1
#define AUDIO_PRODUCT_ID_11   0x0768 		//!vendorid3 USB8741 UAC2
#define AUDIO_PRODUCT_ID_12   0x075C 		//!vendorid3 AB-1.x UAC1
#define AUDIO_PRODUCT_ID_13   0x075D 		//!vendorid3 AB-1.x UAC2
#define AUDIO_PRODUCT_ID_14   0x075E 		//!vendorid3 QNKTC future use UAC1
#define AUDIO_PRODUCT_ID_15   0x075F 		//!vendorid3 QNKTC future use UAC2
#define AUDIO_PRODUCT_ID_16   0x098B 		//!vendorid3 AMB UAC1
#define AUDIO_PRODUCT_ID_17   0x098C 		//!vendorid3 AMB UAC2
#define AUDIO_PRODUCT_ID_18   0x8242		// NBSDAC UAC1
#define AUDIO_PRODUCT_ID_19   0x8243		// NBSDAC UAC2

char *usb_serial_id = NULL;
libusb_device_handle *usb_handle;
char *usb_device = "none";
char usb_data[1024];
unsigned int usb_timeout = 2000;


char *error_string(int err) {
	switch (err) {
	case LIBUSB_SUCCESS: return "Success (no error).";
	case LIBUSB_ERROR_IO: return "Input/output error.";
	case LIBUSB_ERROR_INVALID_PARAM: return "Invalid parameter.";
	case LIBUSB_ERROR_ACCESS: return "Access denied (insufficient permissions).";
	case LIBUSB_ERROR_NO_DEVICE: return "No such device (it may have been disconnected).";
	case LIBUSB_ERROR_NOT_FOUND: return "Entity not found.";
	case LIBUSB_ERROR_BUSY: return "Resource busy.";
	case LIBUSB_ERROR_TIMEOUT: return "Operation timed out.";
	case LIBUSB_ERROR_OVERFLOW: return "Overflow.";
	case LIBUSB_ERROR_PIPE: return "Pipe error.";
	case LIBUSB_ERROR_INTERRUPTED: return "System call interrupted (perhaps due to signal).";
	case LIBUSB_ERROR_NO_MEM: return "Insufficient memory.";
	case LIBUSB_ERROR_NOT_SUPPORTED: return "Operation not supported or unimplemented on this platform.";
	case LIBUSB_ERROR_OTHER: return "Other error.";
	default: {
		static char buff[256];
		sprintf(buff, "undefined error %d", err);
		return buff;
	}
	}
}

int device_to_host_handle(libusb_device_handle *h, unsigned char request, unsigned short value, unsigned short index, unsigned short length) {
	return libusb_control_transfer(h, (REQDIR_DEVICETOHOST | REQTYPE_VENDOR | REQTYPE_STANDARD), request, value, index, usb_data, length, usb_timeout);
}
	
int device_to_host(unsigned char request, unsigned short value, unsigned short index, unsigned short length) {
	return device_to_host_handle(usb_handle, request, value, index, length);
}
	

// this needs modification to handle the -u usb_serial_id option
// must get the total list of devices and query matches for serial id
libusb_device_handle *find_device(int list_all) {
	libusb_device **list;
	ssize_t n_items = libusb_get_device_list(NULL, &list);
	int i;
	for (i = 0; i < n_items; i += 1) {
		libusb_device *d = list[i];
		struct libusb_device_descriptor desc;
		if (libusb_get_device_descriptor(d, &desc) != 0) {
			continue;
		}
		if ((desc.idVendor == DG8SAQ_VENDOR_ID && desc.idProduct == DG8SAQ_PRODUCT_ID) ||
			(desc.idVendor == AUDIO_VENDOR_ID && desc.idProduct == AUDIO_PRODUCT_ID) ||
			(desc.idVendor == AUDIO_VENDOR_ID && desc.idProduct == AUDIO_PRODUCT_ID_UAC1) || // BSB 20120426
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_4) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_5) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_6) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_7) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_8) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_9) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_10) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_11) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_12) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_13) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_14) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_15) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_16) ||
			(desc.idVendor == AUDIO_VENDOR_ID_3 && desc.idProduct == AUDIO_PRODUCT_ID_17) ||
			(desc.idVendor == AUDIO_VENDOR_ID_4 && desc.idProduct == AUDIO_PRODUCT_ID_18) ||
			(desc.idVendor == AUDIO_VENDOR_ID_4 && desc.idProduct == AUDIO_PRODUCT_ID_19) ||
			(desc.idVendor == HPSDR_VENDOR_ID && desc.idProduct == HPSDR_PRODUCT_ID)) {
			libusb_device_handle *h;
			int status;
			if ((status = libusb_open(d, &h)) != 0) {
				if (verbose)
					fprintf(stderr, "find_device: libusb_open(%04x:%04x, ...) failed: %s", desc.idVendor, desc.idProduct, error_string(status));
				continue;
			}
			if ((status = libusb_claim_interface(h, 0)) != 0) {
				if (verbose)
					fprintf(stderr, "find_device: libusb_claim_interface(%04x:%04x, ...) failed: %s", desc.idVendor, desc.idProduct, error_string(status));
				libusb_close(h);
				continue;
			}
			unsigned char serialId[1024];
			if ((status = libusb_get_string_descriptor_ascii(h, desc.iSerialNumber, serialId, sizeof(serialId))) <= 0) {
				if (verbose)
					if (status == 0)
						fprintf(stderr, "find_device: libusb_get_string_descriptor_ascii(%04x:%04x, ...) returned 0 bytes", desc.idVendor, desc.idProduct);
					else
						fprintf(stderr, "find_device: libusb_get_string_descriptor_ascii(%04x:%04x, ...) failed: %s", desc.idVendor, desc.idProduct, error_string(status));
				libusb_release_interface(h, 0);
				libusb_close(h);
				continue;
			}
			serialId[status] = 0;
			if ((status = libusb_release_interface(h, 0)) != 0) {
				if (verbose)
					fprintf(stderr, "find_device: libusb_release_interface(%04x:%04x, ...) failed: %s", desc.idVendor, desc.idProduct, error_string(status));
				libusb_close(h);
				continue;
			}
			if (usb_serial_id != NULL && strcmp(serialId, usb_serial_id) != 0) {
				libusb_close(h);
				continue;
			}
			if (list_all) {
				fprintf(stdout, "%04x:%04x %s\n", desc.idVendor, desc.idProduct, serialId);
				if (usb_handle == NULL)
					usb_handle = h;
				else
					libusb_close(h);
			} else {
				// one last check to see if this device implements the features api
				libusb_claim_interface(h, 0);
				status = device_to_host_handle(h, FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_NVRAM, true_feature_major_index, 8);
				libusb_release_interface(h, 0);
				if (status != 1 || (usb_data[0] & 0xff) == 0xff) { 
					if (verbose)
						fprintf(stderr, "find_device: %04x:%04x did not respond to features request\n", desc.idVendor, desc.idProduct);
					libusb_close(h);
					continue;
				}
				usb_handle = h;
				break;
			}
		}
	}
	libusb_free_device_list(list, 1);
	return usb_handle;
}

void setup() {
	libusb_init(NULL);
	usb_handle = find_device(0);
	if (usb_handle == NULL) {
		fprintf(stderr, "widget-control: failed to find device\n");
		libusb_exit(NULL);
		exit(1);
	}
	if ( verbose )
		fprintf(stdout, "widget-control: opened %s device\n", usb_device);
	if (libusb_claim_interface(usb_handle, 0) != 0) {
		fprintf(stderr, "widget-control: failed to claim interface 0\n");
		exit(finish(1));
	}
	{
		// read out the widget's major and minor version numbers
		int i, j, res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_NVRAM, true_feature_major_index, 8);
		if (res == 1)
		{
			true_feature_end_index = usb_data[0];
		}
		else {
			fprintf(stderr, "unable to read true feature_end_index\n");
			exit(finish(1));
		}
		res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_NVRAM, true_feature_minor_index, 8);
		if (res == 1)
		{
			true_feature_end_values = usb_data[0];
		}
		else {
			fprintf(stderr, "unable to read true feature_end_values\n");
			exit(finish(1));
		}
		// allocate arrays for feature values and names
		true_features_default = (uint8_t *)calloc(true_feature_end_index, sizeof(uint8_t));
		true_features_nvram = (uint8_t *)calloc(true_feature_end_index, sizeof(uint8_t));
		true_features_mem = (uint8_t *)calloc(true_feature_end_index, sizeof(uint8_t));
		true_feature_index_names = (char **)calloc(true_feature_end_index, sizeof(char *));
		true_feature_value_names = (char **)calloc(true_feature_end_values, sizeof(char *));
		feature_first_value = (int *)calloc(true_feature_end_index, sizeof(int));
		feature_last_value = (int *)calloc(true_feature_end_index, sizeof(int));
		if (true_features_default == NULL ||
			true_features_nvram == NULL ||
			true_features_mem == NULL ||
			true_feature_index_names == NULL ||
			true_feature_value_names == NULL ||
			feature_first_value == NULL ||
			feature_last_value == NULL) {
			fprintf(stderr, "unable to allocate memory for feature data\n");
			exit(finish(1));
		}
		// read out the widget's index and value names
		for (i = true_feature_major_index; i < true_feature_end_index; i += 1) {
			res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_INDEX_NAME, i, sizeof(usb_data));
			true_feature_index_names[i] = calloc(res+1, sizeof(char));
			if (true_feature_index_names[i] == NULL) {
				fprintf(stderr, "unable to allocate memory for feature data\n");
				exit(finish(1));
			}
			for (j = 0; j < res; j += 1) true_feature_index_names[i][res-j-1] = usb_data[j];
			// strncpy(true_feature_index_names[i], usb_data, res);
			true_feature_index_names[i][res] = 0;
			// fprintf(stderr, "retrieved '%s' for index name of %d\n", true_feature_index_names[i], i);
		}
		for (i = 0; i < true_feature_end_values; i += 1) {
			res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_VALUE_NAME, i, sizeof(usb_data));
			true_feature_value_names[i] = calloc(res+1, sizeof(char));
			if (true_feature_value_names[i] == NULL) {
				fprintf(stderr, "unable to allocate memory for feature data\n");
				exit(finish(1));
			}
			for (j = 0; j < res; j += 1) true_feature_value_names[i][res-j-1] = usb_data[j];
			// strncpy(true_feature_value_names[i], usb_data, res);
			true_feature_value_names[i][res] = 0;
			// fprintf(stderr, "retrieved '%s' for value name of %d\n", true_feature_value_names[i], i);
		}
		// set up index to value mapping
		feature_first_and_last_init();
		// fetch default values from image
		for (i = 0; i < true_feature_end_index; i += 1) {
			res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_DEFAULT, i, 8);
			if (res == 1)
				true_features_default[i] = usb_data[0];
			else {
				fprintf(stderr, "unable to read true features_default %d\n", i);
				exit(finish(1));
			}
		}
	}
}

int finish(int return_value) {
	if (usb_handle != NULL) {
		libusb_release_interface(usb_handle, 0);
		libusb_close(usb_handle);
	}
	libusb_exit(NULL);
	return return_value;
}

int get_all_devices() {
	libusb_init(NULL);
	usb_handle = find_device(1);
	return finish(0);
}

char* feature_name(char* buf, int nbuf, int index, int feature)
{
	char* feature_name = true_feature_index_names[index];
	int slen = strlen(feature_name);
	
	if (feature_name[slen-1] == '#')
	{
		snprintf(buf, nbuf, "%d", feature);
		return buf;
	}

	if (feature > feature_end_values)
	{
		snprintf(buf, nbuf, "Unknwon(%d)", feature);
		return buf;
	}

	return true_feature_value_names[feature];
}

/*
** functions
*/
void print_all_features(uint8_t *fp) {
	int j;
	char buf[256];
	fprintf(stdout, "%d %d", fp[true_feature_major_index], fp[true_feature_minor_index]);
	for (j = true_feature_minor_index+1; j < true_feature_end_index; j += 1)
	{
//		fprintf(stdout, " %s", feature_name(buf, sizeof(buf), fp[j]));
		fprintf(stdout, "%s: %s\n", true_feature_index_names[j], feature_name(buf, sizeof(buf), j, fp[j]));
	}
	//fprintf(stdout, "\n");
}

void list_all_features() {
	int j, k;
	setup();
	for (j = 0; j < true_feature_end_index; j += 1) {
		switch (j) {
		case true_feature_major_index:
		case true_feature_minor_index:
			fprintf(stdout, "%s %d\n", true_feature_index_names[j], true_features_default[j]);
			continue;
		default:
			fprintf(stdout, "%s = ", true_feature_index_names[j]);
			for (k = first_value(j); k <= last_value(j); k += 1)
				fprintf(stdout, " %s", true_feature_value_names[k]);
			fprintf(stdout, " \n");
		}
	}
}

int get_nvram() {
	int i;
	setup();
	for (i = true_feature_major_index; i < true_feature_end_index; i += 1) {
		int res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_NVRAM, i, 8);
		if (res == 1)
			true_features_nvram[i] = usb_data[0];
		else {
			fprintf(stderr, "widget-control: device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_NVRAM, %d, 0) returned %s?\n", i, error_string(res));
			exit(finish(1));
		}
	}
	print_all_features(true_features_nvram);
	return finish(0);
}

int get_mem() {
	int i;
	setup();
	for (i = true_feature_major_index; i < true_feature_end_index; i += 1) {
		int res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_RAM, i, 8);
		if (res == 1)
			true_features_mem[i] = usb_data[0];
		else {
			fprintf(stderr, "widget-control: device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_GET_RAM, %d, 0) returned %s?\n", i, error_string(res));
			exit(finish(1));
		}
	}
	print_all_features(true_features_mem);
	return finish(0);
}

int get_default() {
	setup();
	print_all_features(true_features_default);
	return finish(0);
}

int set_nvram(int argc, char *argv[]) {
	int i, j;
	uint8_t *features;
	setup();
	if (argc == true_feature_end_index - 2) {
		// major and minor are implicit
		argv -= 2;
		argc += 2;
	} else if (argc == true_feature_end_index) {
		// verify the major and minor
		if (atoi(argv[true_feature_major_index]) != true_feature_end_index) {
			fprintf(stderr, "widget-control: invalid major version number %s, should be %d\n", argv[true_feature_major_index], true_feature_end_index);
			exit(1);
		}
		if (atoi(argv[true_feature_minor_index]) != true_features_default[feature_minor_index]) {
			fprintf(stderr, "widget-control: invalid minor version number %s, should be %d\n", argv[true_feature_minor_index], true_feature_end_values);
			exit(1);
		}
	} else {
		// invalid number of features
		fprintf(stderr, "widget-control: wrong number (%d) of features specified, should be %d features to set\n", argc, true_feature_end_index);
		exit(1);
	}
	features = (uint8_t *)calloc(true_feature_major_index, sizeof(uint8_t));
	for (i = true_feature_minor_index+1; i < true_feature_end_index; i += 1) {
		j = find_feature_value(i, argv[i]);
		if (j >= first_value(i) && j <= last_value(i)) {
			features[i] = j;
		} else {
			free((void *)features);
			fprintf(stderr, "widget-control: %s is invalid value for %s\n", argv[i], true_feature_index_names[i]);
			exit(1);
		}
	}
	for (i = true_feature_minor_index+1; i < true_feature_end_index; i += 1) {
		int res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_SET_NVRAM, i | (features[i] << 8), 8);
		if (res != 1) {
			fprintf(stderr, "widget-control: device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_SET_NVRAM, %d | (%d << 8), 8) returned %s?\n",
					i, features[i], error_string(res));
			free((void *)features);
			exit(finish(1));
		}
	}
	free((void *)features);
	return finish(0);
}

int get_from_string(char** string_list, char* s, int start, int end)
{
	int i;
	for (i = start; i < end; i ++)
	{
		if (strcmp(s, string_list[i]) == 0)
		{
			return i;
		}  
	}

	return atoi(s);
}


int set_singlenvram(int argc, char *argv[])
{
	char *feature = argv[0];
	char *value = argv[1];

	setup();

	int feature_index = get_from_string(true_feature_index_names, feature, 1, true_feature_end_index);
	int value_index = get_from_string(true_feature_value_names, value, 0, true_feature_end_values);

	printf("Setting feature \"%s\"(%d) to \"%s\"(%d)\n", feature, feature_index, value, value_index);

	int res = device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_SET_NVRAM, feature_index | (value_index << 8), 8);
	if (res != 1)
	{
		fprintf(stderr, "widget-control: device_to_host(FEATURE_DG8SAQ_COMMAND, FEATURE_DG8SAQ_SET_NVRAM, %d | (%d << 8), 8) returned %s?\n",
				feature_index, value_index, error_string(res));
		return 1;
	}


	return 0;
}

int reset_widget() {
	setup();
	int res = device_to_host(WIDGET_RESET, 0, 0, 8);
	if (res != 1) {
		fprintf(stderr, "widget-control: device_to_host(WIDGET_RESET, 0, 0, 8) returned %s?\n", error_string(res));
		exit(finish(1));
	}
    return finish(0);
}

int dfu_widget() {
	setup();
	 device_to_host(WIDGET_DFU, 0, 0, 8);
    return finish(0);
}

int main(int argc, char *argv[]) {
	int i;
	for (i = 1; i < argc; i += 1) {
		if (strcmp(argv[i], "-u") == 0) { // specify usb serial id
			if (i + 1 >= argc) {
				fprintf(stderr, "widget-control: usb serial id for -u option\n");
				exit(finish(1));
			} else {
				usb_serial_id = argv[++i];
				continue;
			}
		}
		if (strcmp(argv[i], "-a") == 0) { // list all devices connected
			exit(get_all_devices());
		}
		if (strcmp(argv[i], "-v") == 0) { // be verbose
			verbose = 1;
			continue;
		}
		if (strcmp(argv[i], "-d") == 0) { // list default values
			exit(get_default());
		}
		if (strcmp(argv[i], "-l") == 0) { // list available features
			list_all_features();
			exit(0);
		}
		if (strcmp(argv[i], "-g") == 0) { // get feature(s)
			exit(get_nvram());
		}
		if (strcmp(argv[i], "-s") == 0) { // set feature(s)
			exit(set_nvram(argc-i-1, argv+i+1));
		}
		if (strcmp(argv[i], "-f") == 0) { // set feature(s)
			exit(set_singlenvram(argc-i-1, argv+i+1));
		}
		if (strcmp(argv[i], "-m") == 0) { // get feature(s) from memory
			exit(get_mem());
		}
		if (strcmp(argv[i], "-r") == 0) { // reboot widget
			exit(reset_widget());
		}
		if (strcmp(argv[i], "-p") == 0) { // DFU
			exit(dfu_widget());
		}
	}
	fprintf(stderr, usage);
	exit(1);
}