--- /dev/null
+.\"
+.\" Copyright © 2016 Keith Packard <keithp@keithp.com>
+.\"
+.\" 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 2 of the License, or
+.\" (at your option) any later version.
+.\"
+.\" This program is distributed in the hope that it will be useful, but
+.\" WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+.\" General Public License for more details.
+.\"
+.\" You should have received a copy of the GNU General Public License along
+.\" with this program; if not, write to the Free Software Foundation, Inc.,
+.\" 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+.\"
+.\"
+.TH AO-LOAD 1 "ao-chaosread" ""
+.SH NAME
+ao-chaosread \- read raw noise source from chaoskey
+.SH SYNOPSIS
+.B "ao-chaosread"
+.SH DESCRIPTION
+.I ao-chaosread
+reads ADC values from the noise source on the attached ChaosKey device.
+.SH OPTIONS
+.TP
+\-s serial | --serial serial
+This selects a ChaosKey by serial number instead of using the first
+one found.
+.SH USAGE
+.I ao-chaosread
+reads noise data.
+.SH AUTHOR
+Keith Packard
--- /dev/null
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <libusb.h>
+#include <getopt.h>
+#include <string.h>
+#include <strings.h>
+
+#define CHAOS_SIZE 64
+
+#define CHAOS_VENDOR 0x1d50
+#define CHAOS_PRODUCT 0x60c6
+
+struct chaoskey {
+ libusb_context *ctx;
+ libusb_device_handle *handle;
+ int kernel_active;
+};
+
+libusb_device_handle *
+chaoskey_match(libusb_device *dev, char *match_serial)
+{
+ struct libusb_device_descriptor desc;
+ int ret;
+ int match_len;
+ char *device_serial = NULL;
+ libusb_device_handle *handle = NULL;
+
+ ret = libusb_get_device_descriptor(dev, &desc);
+ if (ret < 0) {
+ fprintf(stderr, "failed to get device descriptor: %s\n", libusb_strerror(ret));
+ return 0;
+ }
+
+ if (desc.idVendor != CHAOS_VENDOR)
+ return NULL;
+ if (desc.idProduct != CHAOS_PRODUCT)
+ return NULL;
+
+ ret = libusb_open(dev, &handle);
+
+ if (match_serial == NULL)
+ return handle;
+
+ if (ret < 0) {
+ fprintf(stderr, "failed to open device: %s\n", libusb_strerror(ret));
+ return NULL;
+ }
+
+ match_len = strlen(match_serial);
+ device_serial = malloc(match_len + 2);
+
+ if (!device_serial) {
+ fprintf(stderr, "malloc failed\n");
+ goto out;
+ }
+
+ ret = libusb_get_string_descriptor_ascii(handle, desc.iSerialNumber, device_serial, match_len + 1);
+
+ if (ret < 0) {
+ fprintf(stderr, "failed to get serial number: %s\n", libusb_strerror(ret));
+ goto out;
+ }
+
+ device_serial[ret] = '\0';
+
+ ret = strcmp(device_serial, match_serial);
+ free(device_serial);
+ if (ret)
+ goto out;
+
+ return handle;
+
+out:
+ free(device_serial);
+ if (handle)
+ libusb_close(handle);
+ return 0;
+}
+
+struct chaoskey *
+chaoskey_open(char *serial)
+{
+ struct chaoskey *ck;
+ int ret;
+ ssize_t num;
+ libusb_device **list;
+ libusb_device *device = NULL;
+ int d;
+
+ ck = calloc(sizeof (struct chaoskey), 1);
+ if (!ck)
+ goto out;
+ ret = libusb_init(&ck->ctx);
+ if (ret ) {
+ fprintf(stderr, "libusb_init failed: %s\n", libusb_strerror(ret));
+ goto out;
+ }
+
+ num = libusb_get_device_list(ck->ctx, &list);
+ if (num < 0) {
+ fprintf(stderr, "libusb_get_device_list failed: %s\n", libusb_strerror(num));
+ goto out;
+ }
+
+ for (d = 0; d < num; d++) {
+ libusb_device_handle *handle;
+
+ handle = chaoskey_match(list[d], serial);
+ if (handle) {
+ ck->handle = handle;
+ break;
+ }
+ }
+
+ libusb_free_device_list(list, 1);
+
+ if (!ck->handle) {
+ if (serial)
+ fprintf (stderr, "No chaoskey matching %s\n", serial);
+ else
+ fprintf (stderr, "No chaoskey\n");
+ goto out;
+ }
+
+ ck->kernel_active = libusb_kernel_driver_active(ck->handle, 0);
+ if (ck->kernel_active) {
+ ret = libusb_detach_kernel_driver(ck->handle, 0);
+ if (ret)
+ goto out;
+ }
+
+ ret = libusb_claim_interface(ck->handle, 0);
+ if (ret)
+ goto out;
+
+ return ck;
+out:
+ if (ck->kernel_active)
+ libusb_attach_kernel_driver(ck->handle, 0);
+ if (ck->ctx)
+ libusb_exit(ck->ctx);
+ free(ck);
+ return NULL;
+}
+
+void
+chaoskey_close(struct chaoskey *ck)
+{
+ libusb_release_interface(ck->handle, 0);
+ if (ck->kernel_active)
+ libusb_attach_kernel_driver(ck->handle, 0);
+ libusb_close(ck->handle);
+ libusb_exit(ck->ctx);
+ free(ck);
+}
+
+void
+chaoskey_transfer_callback(struct libusb_transfer *transfer)
+{
+ struct chaoskey *ck = transfer->user_data;
+}
+
+#define ENDPOINT 0x86
+
+int
+chaoskey_read(struct chaoskey *ck, uint8_t *buffer, int len)
+{
+ int total = 0;
+
+ while (len) {
+ int ret;
+ int transferred;
+
+ ret = libusb_bulk_transfer(ck->handle, ENDPOINT, buffer, len, &transferred, 10000);
+ if (ret) {
+ if (total)
+ return total;
+ else {
+ errno = EIO;
+ return -1;
+ }
+ }
+ len -= transferred;
+ buffer += transferred;
+ }
+}
+
+static const struct option options[] = {
+ { .name = "serial", .has_arg = 1, .val = 's' },
+ { .name = "length", .has_arg = 1, .val = 'l' },
+ { 0, 0, 0, 0},
+};
+
+static void usage(char *program)
+{
+ fprintf(stderr, "usage: %s [--serial=<serial>] [--length=<length>[kMG]]\n", program);
+ exit(1);
+}
+
+int
+main (int argc, char **argv)
+{
+ struct chaoskey *ck;
+ char buf[1024];
+ int got;
+ int c;
+ char *serial = NULL;
+ char *length_string;
+ char *length_end;
+ unsigned long length = sizeof(buf);
+ int this_time;
+
+ while ((c = getopt_long(argc, argv, "s:l:", options, NULL)) != -1) {
+ switch (c) {
+ case 's':
+ serial = optarg;
+ break;
+ case 'l':
+ length_string = optarg;
+ length = strtoul(length_string, &length_end, 10);
+ if (!strcasecmp(length_end, "k"))
+ length *= 1024;
+ else if (!strcasecmp(length_end, "m"))
+ length *= 1024 * 1024;
+ else if (!strcasecmp(length_end, "g"))
+ length *= 1024 * 1024 * 1024;
+ else if (strlen(length_end))
+ usage(argv[0]);
+ break;
+ default:
+ usage(argv[0]);
+ break;
+ }
+ }
+
+ ck = chaoskey_open(serial);
+ if (!ck)
+ exit(1);
+
+ while (length) {
+ this_time = sizeof(buf);
+ if (length < sizeof(buf))
+ this_time = (int) length;
+ got = chaoskey_read(ck, buf, this_time);
+ if (got < 0) {
+ perror("read");
+ exit(1);
+ }
+ write(1, buf, got);
+ length -= got;
+ }
+ exit(0);
+}
projects / fw / altos / commitdiff