ao-tools: Add ao-usbtrng to dump RNG data for testing

[fw/altos] / ao-tools / ao-usbtrng / ao-usbtrng.c

diff --git a/ao-tools/ao-usbtrng/ao-usbtrng.c b/ao-tools/ao-usbtrng/ao-usbtrng.c
new file mode 100644 (file)
index 0000000..232f4e3
--- /dev/null
+++ b/ao-tools/ao-usbtrng/ao-usbtrng.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright © 2014 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 <err.h>
+#include <fcntl.h>
+#include <gelf.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sysexits.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <string.h>
+#include <stdbool.h>
+#include "ao-elf.h"
+#include "ccdbg.h"
+#include "cc-usb.h"
+#include "cc.h"
+#include "ao-verbose.h"
+
+static const struct option options[] = {
+       { .name = "tty", .has_arg = 1, .val = 'T' },
+       { .name = "device", .has_arg = 1, .val = 'D' },
+       { .name = "raw", .has_arg = 0, .val = 'r' },
+       { .name = "verbose", .has_arg = 1, .val = 'v' },
+       { 0, 0, 0, 0},
+};
+
+static void usage(char *program)
+{
+       fprintf(stderr, "usage: %s [--verbose=<verbose>] [--device=<device>] [-tty=<tty>] <kbytes>\n", program);
+       exit(1);
+}
+
+void
+done(struct cc_usb *cc, int code)
+{
+       cc_usb_close(cc);
+       exit (code);
+}
+
+int
+main (int argc, char **argv)
+{
+       char                    *device = NULL;
+       char                    *filename;
+       Elf                     *e;
+       unsigned int            s;
+       int                     i;
+       int                     c;
+       int                     tries;
+       struct cc_usb           *cc = NULL;
+       char                    *tty = NULL;
+       int                     success;
+       int                     verbose = 0;
+       int                     ret = 0;
+       int                     expected_size;
+       int                     kbytes;
+       uint8_t                 bits[1024];
+
+       while ((c = getopt_long(argc, argv, "rT:D:c:s:v:", options, NULL)) != -1) {
+               switch (c) {
+               case 'T':
+                       tty = optarg;
+                       break;
+               case 'D':
+                       device = optarg;
+                       break;
+               case 'v':
+                       verbose++;
+                       break;
+               default:
+                       usage(argv[0]);
+                       break;
+               }
+       }
+
+       if (!argv[optind])
+               usage(argv[0]);
+
+       kbytes = atoi(argv[optind]);
+       if (kbytes < 1)
+               kbytes = 1;
+
+       ao_verbose = verbose;
+
+       if (verbose > 1)
+               ccdbg_add_debug(CC_DEBUG_BITBANG);
+
+       if (!tty)
+               tty = cc_usbdevs_find_by_arg(device, "usbtrng");
+       if (!tty)
+               tty = getenv("ALTOS_TTY");
+       if (!tty)
+               tty="/dev/ttyACM0";
+
+       cc = cc_usb_open(tty);
+
+       if (!cc)
+               exit(1);
+
+       cc_usb_printf(cc, "f %d\n", kbytes);
+
+       while (kbytes--) {
+               int     i;
+               for (i = 0; i < 1024; i++)
+                       bits[i] = cc_usb_getchar(cc);
+               write(1, bits, 1024);
+       }
+
+       done(cc, ret);
+}