Merge branch 'master' of ssh://git.gag.com/scm/git/fw/altos
[fw/altos] / ao-tools / ao-usbtrng / ao-usbtrng.c
1 /*
2  * Copyright © 2014 Keith Packard <keithp@keithp.com>
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 2 of the License.
7  *
8  * This program is distributed in the hope that it will be useful, but
9  * WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
11  * General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License along
14  * with this program; if not, write to the Free Software Foundation, Inc.,
15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
16  */
17
18 #include <err.h>
19 #include <fcntl.h>
20 #include <gelf.h>
21 #include <stdio.h>
22 #include <stdint.h>
23 #include <stdlib.h>
24 #include <sysexits.h>
25 #include <unistd.h>
26 #include <getopt.h>
27 #include <string.h>
28 #include <stdbool.h>
29 #include "ao-elf.h"
30 #include "ccdbg.h"
31 #include "cc-usb.h"
32 #include "cc.h"
33 #include "ao-verbose.h"
34
35 static const struct option options[] = {
36         { .name = "tty", .has_arg = 1, .val = 'T' },
37         { .name = "device", .has_arg = 1, .val = 'D' },
38         { .name = "verbose", .has_arg = 0, .val = 'v' },
39         { 0, 0, 0, 0},
40 };
41
42 static void usage(char *program)
43 {
44         fprintf(stderr, "usage: %s [--verbose] [--device=<AltOS-device>] [-tty=<tty>] [<kbytes>]\n", program);
45         exit(1);
46 }
47
48 void
49 done(struct cc_usb *cc, int code)
50 {
51         cc_usb_close(cc);
52         exit (code);
53 }
54
55 int
56 main (int argc, char **argv)
57 {
58         char                    *device = NULL;
59         char                    *filename;
60         int                     i;
61         int                     c;
62         struct cc_usb           *cc = NULL;
63         char                    *tty = NULL;
64         int                     verbose = 0;
65         int                     ret = 0;
66         int                     kbytes = 0; /* 0 == continuous */
67         int                     written;
68         uint8_t                 bits[1024];
69
70         while ((c = getopt_long(argc, argv, "vT:D:", options, NULL)) != -1) {
71                 switch (c) {
72                 case 'T':
73                         tty = optarg;
74                         break;
75                 case 'D':
76                         device = optarg;
77                         break;
78                 case 'v':
79                         verbose++;
80                         break;
81                 default:
82                         usage(argv[0]);
83                         break;
84                 }
85         }
86
87         if (optind < argc)
88                 kbytes = atoi(argv[optind]);
89
90         ao_verbose = verbose;
91
92         if (verbose > 1)
93                 ccdbg_add_debug(CC_DEBUG_BITBANG);
94
95         if (!tty)
96                 tty = cc_usbdevs_find_by_arg(device, "usbtrng");
97         if (!tty)
98                 tty = getenv("ALTOS_TTY");
99         if (!tty)
100                 tty="/dev/ttyACM0";
101
102         cc = cc_usb_open(tty);
103
104         if (!cc)
105                 exit(1);
106
107         if (kbytes) {
108                 cc_usb_printf(cc, "f %d\n", kbytes);
109
110                 while (kbytes--) {
111                         for (i = 0; i < 1024; i++)
112                                 bits[i] = cc_usb_getchar(cc);
113                         write(1, bits, 1024);
114                 }
115         } else { /* 0 == continuous */
116                 written = 0;
117                 while (written >= 0) {
118                         cc_usb_printf(cc, "f 1\n");
119                         for (i = 0; i < 1024; i++)
120                                 bits[i] = cc_usb_getchar(cc);
121                         written = write(1, bits, 1024);
122                 }
123         }
124
125         done(cc, ret);
126 }