1 /***************************************************************************
2 * Copyright (C) 2011 by Richard Uhler *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
17 ***************************************************************************/
27 #include <jtag/interface.h>
30 /* arbitrary limit on host name length: */
31 #define REMOTE_BITBANG_HOST_MAX 255
33 #define REMOTE_BITBANG_RAISE_ERROR(expr ...) \
36 LOG_ERROR("Terminating openocd."); \
40 static char *remote_bitbang_host
;
41 static char *remote_bitbang_port
;
43 FILE *remote_bitbang_in
;
44 FILE *remote_bitbang_out
;
46 static void remote_bitbang_putc(int c
)
48 if (EOF
== fputc(c
, remote_bitbang_out
))
49 REMOTE_BITBANG_RAISE_ERROR("remote_bitbang_putc: %s", strerror(errno
));
52 static int remote_bitbang_quit(void)
54 if (EOF
== fputc('Q', remote_bitbang_out
)) {
55 LOG_ERROR("fputs: %s", strerror(errno
));
59 if (EOF
== fflush(remote_bitbang_out
)) {
60 LOG_ERROR("fflush: %s", strerror(errno
));
64 /* We only need to close one of the FILE*s, because they both use the same */
65 /* underlying file descriptor. */
66 if (EOF
== fclose(remote_bitbang_out
)) {
67 LOG_ERROR("fclose: %s", strerror(errno
));
71 free(remote_bitbang_host
);
72 free(remote_bitbang_port
);
74 LOG_INFO("remote_bitbang interface quit");
78 /* Get the next read response. */
79 static int remote_bitbang_rread(void)
81 if (EOF
== fflush(remote_bitbang_out
)) {
82 remote_bitbang_quit();
83 REMOTE_BITBANG_RAISE_ERROR("fflush: %s", strerror(errno
));
86 int c
= fgetc(remote_bitbang_in
);
93 remote_bitbang_quit();
94 REMOTE_BITBANG_RAISE_ERROR(
95 "remote_bitbang: invalid read response: %c(%i)", c
, c
);
99 static int remote_bitbang_read(void)
101 remote_bitbang_putc('R');
102 return remote_bitbang_rread();
105 static void remote_bitbang_write(int tck
, int tms
, int tdi
)
107 char c
= '0' + ((tck
? 0x4 : 0x0) | (tms
? 0x2 : 0x0) | (tdi
? 0x1 : 0x0));
108 remote_bitbang_putc(c
);
111 static void remote_bitbang_reset(int trst
, int srst
)
113 char c
= 'r' + ((trst
? 0x2 : 0x0) | (srst
? 0x1 : 0x0));
114 remote_bitbang_putc(c
);
117 static void remote_bitbang_blink(int on
)
119 char c
= on
? 'B' : 'b';
120 remote_bitbang_putc(c
);
123 static struct bitbang_interface remote_bitbang_bitbang
= {
124 .read
= &remote_bitbang_read
,
125 .write
= &remote_bitbang_write
,
126 .reset
= &remote_bitbang_reset
,
127 .blink
= &remote_bitbang_blink
,
130 static int remote_bitbang_init_tcp(void)
132 struct addrinfo hints
= { .ai_family
= AF_UNSPEC
, .ai_socktype
= SOCK_STREAM
};
133 struct addrinfo
*result
, *rp
;
136 LOG_INFO("Connecting to %s:%s",
137 remote_bitbang_host
? remote_bitbang_host
: "localhost",
138 remote_bitbang_port
);
140 /* Obtain address(es) matching host/port */
141 int s
= getaddrinfo(remote_bitbang_host
, remote_bitbang_port
, &hints
, &result
);
143 LOG_ERROR("getaddrinfo: %s\n", gai_strerror(s
));
147 /* getaddrinfo() returns a list of address structures.
148 Try each address until we successfully connect(2).
149 If socket(2) (or connect(2)) fails, we (close the socket
150 and) try the next address. */
152 for (rp
= result
; rp
!= NULL
; rp
= rp
->ai_next
) {
153 fd
= socket(rp
->ai_family
, rp
->ai_socktype
, rp
->ai_protocol
);
157 if (connect(fd
, rp
->ai_addr
, rp
->ai_addrlen
) != -1)
163 freeaddrinfo(result
); /* No longer needed */
165 if (rp
== NULL
) { /* No address succeeded */
166 LOG_ERROR("Failed to connect: %s", strerror(errno
));
173 static int remote_bitbang_init_unix(void)
175 if (remote_bitbang_host
== NULL
) {
176 LOG_ERROR("host/socket not specified");
180 LOG_INFO("Connecting to unix socket %s", remote_bitbang_host
);
181 int fd
= socket(PF_UNIX
, SOCK_STREAM
, 0);
183 LOG_ERROR("socket: %s", strerror(errno
));
187 struct sockaddr_un addr
;
188 addr
.sun_family
= AF_UNIX
;
189 strncpy(addr
.sun_path
, remote_bitbang_host
, sizeof(addr
.sun_path
));
190 addr
.sun_path
[sizeof(addr
.sun_path
)-1] = '\0';
192 if (connect(fd
, (struct sockaddr
*)&addr
, sizeof(struct sockaddr_un
)) < 0) {
193 LOG_ERROR("connect: %s", strerror(errno
));
200 static int remote_bitbang_init(void)
203 bitbang_interface
= &remote_bitbang_bitbang
;
205 LOG_INFO("Initializing remote_bitbang driver");
206 if (remote_bitbang_port
== NULL
)
207 fd
= remote_bitbang_init_unix();
209 fd
= remote_bitbang_init_tcp();
214 remote_bitbang_in
= fdopen(fd
, "r");
215 if (remote_bitbang_in
== NULL
) {
216 LOG_ERROR("fdopen: failed to open read stream");
221 remote_bitbang_out
= fdopen(fd
, "w");
222 if (remote_bitbang_out
== NULL
) {
223 LOG_ERROR("fdopen: failed to open write stream");
224 fclose(remote_bitbang_in
);
228 LOG_INFO("remote_bitbang driver initialized");
232 COMMAND_HANDLER(remote_bitbang_handle_remote_bitbang_port_command
)
236 COMMAND_PARSE_NUMBER(u16
, CMD_ARGV
[0], port
);
237 free(remote_bitbang_port
);
238 remote_bitbang_port
= port
== 0 ? NULL
: strdup(CMD_ARGV
[0]);
241 return ERROR_COMMAND_SYNTAX_ERROR
;
244 COMMAND_HANDLER(remote_bitbang_handle_remote_bitbang_host_command
)
247 free(remote_bitbang_host
);
248 remote_bitbang_host
= strdup(CMD_ARGV
[0]);
251 return ERROR_COMMAND_SYNTAX_ERROR
;
254 static const struct command_registration remote_bitbang_command_handlers
[] = {
256 .name
= "remote_bitbang_port",
257 .handler
= remote_bitbang_handle_remote_bitbang_port_command
,
258 .mode
= COMMAND_CONFIG
,
259 .help
= "Set the port to use to connect to the remote jtag.\n"
260 " if 0 or unset, use unix sockets to connect to the remote jtag.",
261 .usage
= "port_number",
264 .name
= "remote_bitbang_host",
265 .handler
= remote_bitbang_handle_remote_bitbang_host_command
,
266 .mode
= COMMAND_CONFIG
,
267 .help
= "Set the host to use to connect to the remote jtag.\n"
268 " if port is 0 or unset, this is the name of the unix socket to use.",
269 .usage
= "host_name",
271 COMMAND_REGISTRATION_DONE
,
274 struct jtag_interface remote_bitbang_interface
= {
275 .name
= "remote_bitbang",
276 .execute_queue
= &bitbang_execute_queue
,
277 .commands
= remote_bitbang_command_handlers
,
278 .init
= &remote_bitbang_init
,
279 .quit
= &remote_bitbang_quit
,
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