1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
From 059d5512e840fe68e2bb37add6c9208fa9c34d15 Mon Sep 17 00:00:00 2001
From: Sekhar Nori <nsekhar@ti.com>
Date: Tue, 24 Feb 2015 22:16:37 +0530
Subject: [PATCH 1/2] Add option to enable internal loopback
Upstream-status: Pending
---
serialcheck.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/serialcheck.c b/serialcheck.c
index 4f5b747..4100c37 100644
--- a/serialcheck.c
+++ b/serialcheck.c
@@ -12,6 +12,8 @@
#include <sys/ioctl.h>
#include <linux/serial.h>
+#define TIOCM_LOOP 0x8000
+
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
@@ -40,6 +42,7 @@ struct g_opt {
unsigned char hflow;
unsigned char do_termios;
unsigned char *cmp_buff;
+ unsigned char loopback;
};
/* name, key, arg, flags, doc, group */
@@ -51,6 +54,7 @@ static struct argp_option options[] = {
{"mode", 'm', "M", 0, "transfer mode (d = duplex, t = send r = receive)", 0},
{"loops", 'l', "NUM", 0, "loops to perform (0 => wait fot CTRL-C", 0},
{"no-termios", 'n', NULL, 0, "No termios change (baud rate etc. remains unchanged)", 0},
+ {"loopback", 'k', NULL, 0, "loopback mode", 0},
{NULL, 0, NULL, 0, NULL, 0}
};
@@ -67,6 +71,7 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state)
go->baudrate = 115200;
go->loops = UINT_MAX;
go->do_termios = 1;
+ go->loopback = 0;
break;
case ARGP_KEY_ARG:
ret = ARGP_ERR_UNKNOWN;
@@ -113,6 +118,9 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state)
} else
go->loops = num;
break;
+ case 'k':
+ go->loopback = 1;
+ break;
default:
ret = ARGP_ERR_UNKNOWN;
}
@@ -487,6 +495,21 @@ int main(int argc, char *argv[])
die("tcflush failed: %m\n");
}
+ if (opts.loopback) {
+ unsigned int mcr;
+
+ ret = ioctl(fd, TIOCMGET, &mcr);
+ if (ret < 0)
+ die("mcr get failed: %m\n");
+
+ mcr |= TIOCM_LOOP;
+
+ ret = ioctl(fd, TIOCMSET, &mcr);
+ if (ret < 0)
+ die ("mcr set failed: %m\n");
+
+ }
+
ret = fcntl(fd, F_SETFL, 0);
if (ret)
printf("Failed to remove nonblock mode\n");
--
1.9.1
|
