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-rw-r--r--src/jtag/drivers/Makefile.am3
-rw-r--r--src/jtag/drivers/remote_bitbang.c286
-rw-r--r--src/jtag/interfaces.c6
3 files changed, 295 insertions, 0 deletions
diff --git a/src/jtag/drivers/Makefile.am b/src/jtag/drivers/Makefile.am
index 805d1a49..408ea810 100644
--- a/src/jtag/drivers/Makefile.am
+++ b/src/jtag/drivers/Makefile.am
@@ -81,6 +81,9 @@ endif
if BUSPIRATE
DRIVERFILES += buspirate.c
endif
+if REMOTE_BITBANG
+DRIVERFILES += remote_bitbang.c
+endif
noinst_HEADERS = \
bitbang.h \
diff --git a/src/jtag/drivers/remote_bitbang.c b/src/jtag/drivers/remote_bitbang.c
new file mode 100644
index 00000000..d3ab1b11
--- /dev/null
+++ b/src/jtag/drivers/remote_bitbang.c
@@ -0,0 +1,286 @@
+/***************************************************************************
+ * Copyright (C) 2011 by Richard Uhler *
+ * ruhler@mit.edu *
+ * *
+ * 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. *
+ ***************************************************************************/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netdb.h>
+#include <jtag/interface.h>
+#include "bitbang.h"
+
+// from unix man page and sys/un.h:
+#define UNIX_PATH_MAX 108
+
+// arbitrary limit on host name length:
+#define REMOTE_BITBANG_HOST_MAX 255
+
+#define REMOTE_BITBANG_RAISE_ERROR(expr ...) \
+ LOG_ERROR(expr); LOG_ERROR("Terminating openocd."); exit(-1);
+
+static char remote_bitbang_host[REMOTE_BITBANG_HOST_MAX] = "openocd";
+static uint16_t remote_bitbang_port = 0;
+
+FILE* remote_bitbang_in;
+FILE* remote_bitbang_out;
+
+static void remote_bitbang_putc(int c)
+{
+ if (EOF == fputc(c, remote_bitbang_out)) {
+ REMOTE_BITBANG_RAISE_ERROR("remote_bitbang_putc: %s", strerror(errno));
+ }
+}
+
+static int remote_bitbang_quit(void)
+{
+ if (EOF == fputc('Q', remote_bitbang_out)) {
+ LOG_ERROR("fputs: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+
+ if (EOF == fflush(remote_bitbang_out)) {
+ LOG_ERROR("fflush: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+
+ // We only need to close one of the FILE*s, because they both use the same
+ // underlying file descriptor.
+ if (EOF == fclose(remote_bitbang_out)) {
+ LOG_ERROR("fclose: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+
+ LOG_INFO("remote_bitbang interface quit");
+ return ERROR_OK;
+}
+
+// Get the next read response.
+static int remote_bitbang_rread(void)
+{
+ if (EOF == fflush(remote_bitbang_out)) {
+ remote_bitbang_quit();
+ REMOTE_BITBANG_RAISE_ERROR("fflush: %s", strerror(errno));
+ }
+
+ int c = fgetc(remote_bitbang_in);
+ switch (c) {
+ case '0': return 0;
+ case '1': return 1;
+ default:
+ remote_bitbang_quit();
+ REMOTE_BITBANG_RAISE_ERROR(
+ "remote_bitbang: invalid read response: %c(%i)", c, c);
+ }
+}
+
+static int remote_bitbang_read(void)
+{
+ remote_bitbang_putc('R');
+ return remote_bitbang_rread();
+}
+
+static void remote_bitbang_write(int tck, int tms, int tdi)
+{
+ char c = '0' + ((tck ? 0x4 : 0x0) | (tms ? 0x2 : 0x0) | (tdi ? 0x1 : 0x0));
+ remote_bitbang_putc(c);
+}
+
+static void remote_bitbang_reset(int trst, int srst)
+{
+ char c = 'r' + ((trst ? 0x2 : 0x0) | (srst ? 0x1 : 0x0));
+ remote_bitbang_putc(c);
+}
+
+static void remote_bitbang_blink(int on)
+{
+ char c = on ? 'B' : 'b';
+ remote_bitbang_putc(c);
+}
+
+static struct bitbang_interface remote_bitbang_bitbang = {
+ .read = &remote_bitbang_read,
+ .write = &remote_bitbang_write,
+ .reset = &remote_bitbang_reset,
+ .blink = &remote_bitbang_blink,
+};
+
+static int remote_bitbang_speed(int speed)
+{
+ return ERROR_OK;
+}
+
+static int remote_bitbang_init_tcp(void)
+{
+ LOG_INFO("Connecting to %s:%i", remote_bitbang_host, remote_bitbang_port);
+ int fd = socket(PF_INET, SOCK_STREAM, 0);
+ if (fd < 0) {
+ LOG_ERROR("socket: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+
+ struct hostent* hent = gethostbyname(remote_bitbang_host);
+ if (hent == NULL) {
+ char* errorstr = "???";
+ switch (h_errno) {
+ case HOST_NOT_FOUND: errorstr = "host not found"; break;
+ case NO_ADDRESS: errorstr = "no address"; break;
+ case NO_RECOVERY: errorstr = "no recovery"; break;
+ case TRY_AGAIN: errorstr = "try again"; break;
+ }
+ LOG_ERROR("gethostbyname: %s", errorstr);
+ return ERROR_FAIL;
+ }
+
+ struct sockaddr_in addr;
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(remote_bitbang_port);
+ addr.sin_addr = *(struct in_addr*)hent->h_addr;
+ if (connect(fd, (struct sockaddr*)&addr, sizeof(struct sockaddr_in)) < 0) {
+ LOG_ERROR("connect: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+
+ remote_bitbang_in = fdopen(fd, "r");
+ if (remote_bitbang_in == NULL) {
+ LOG_ERROR("fdopen: failed to open read stream");
+ return ERROR_FAIL;
+ }
+
+ remote_bitbang_out = fdopen(fd, "w");
+ if (remote_bitbang_out == NULL) {
+ LOG_ERROR("fdopen: failed to open write stream");
+ return ERROR_FAIL;
+ }
+
+ LOG_INFO("remote_bitbang driver initialized");
+ return ERROR_OK;
+}
+
+static int remote_bitbang_init_unix(void)
+{
+ LOG_INFO("Connecting to unix socket %s", remote_bitbang_host);
+ int fd = socket(PF_UNIX, SOCK_STREAM, 0);
+ if (fd < 0) {
+ LOG_ERROR("socket: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+
+ struct sockaddr_un addr;
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, remote_bitbang_host, UNIX_PATH_MAX);
+ addr.sun_path[UNIX_PATH_MAX-1] = '\0';
+
+ if (connect(fd, (struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0) {
+ LOG_ERROR("connect: %s", strerror(errno));
+ return ERROR_FAIL;
+ }
+
+ remote_bitbang_in = fdopen(fd, "r");
+ if (remote_bitbang_in == NULL) {
+ LOG_ERROR("fdopen: failed to open read stream");
+ return ERROR_FAIL;
+ }
+
+ remote_bitbang_out = fdopen(fd, "w");
+ if (remote_bitbang_out == NULL) {
+ LOG_ERROR("fdopen: failed to open write stream");
+ return ERROR_FAIL;
+ }
+
+ LOG_INFO("remote_bitbang driver initialized");
+ return ERROR_OK;
+}
+
+static int remote_bitbang_init(void)
+{
+ bitbang_interface = &remote_bitbang_bitbang;
+
+ LOG_INFO("Initializing remote_bitbang driver");
+ if (remote_bitbang_port == 0) {
+ return remote_bitbang_init_unix();
+ }
+ return remote_bitbang_init_tcp();
+}
+
+static int remote_bitbang_khz(int khz, int* jtag_speed)
+{
+ *jtag_speed = 0;
+ return ERROR_OK;
+}
+
+static int remote_bitbang_speed_div(int speed, int* khz)
+{
+ // I don't think this really matters any.
+ *khz = 1;
+ return ERROR_OK;
+}
+
+
+COMMAND_HANDLER(remote_bitbang_handle_remote_bitbang_port_command)
+{
+ if (CMD_ARGC == 1) {
+ COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], remote_bitbang_port);
+ return ERROR_OK;
+ }
+ return ERROR_COMMAND_SYNTAX_ERROR;
+}
+
+COMMAND_HANDLER(remote_bitbang_handle_remote_bitbang_host_command)
+{
+ if (CMD_ARGC == 1) {
+ strncpy(remote_bitbang_host, CMD_ARGV[0], REMOTE_BITBANG_HOST_MAX);
+ remote_bitbang_host[REMOTE_BITBANG_HOST_MAX-1] = '\0';
+ return ERROR_OK;
+ }
+ return ERROR_COMMAND_SYNTAX_ERROR;
+}
+
+
+static const struct command_registration remote_bitbang_command_handlers[] = {
+ {
+ .name = "remote_bitbang_port",
+ .handler = remote_bitbang_handle_remote_bitbang_port_command,
+ .mode = COMMAND_CONFIG,
+ .help = "Set the port to use to connect to the remote jtag.\n"
+ " if 0, use unix sockets to connect to the remote jtag.",
+ .usage = "port_number",
+ },
+ {
+ .name = "remote_bitbang_host",
+ .handler = remote_bitbang_handle_remote_bitbang_host_command,
+ .mode = COMMAND_CONFIG,
+ .help = "Set the host to use to connect to the remote jtag.\n"
+ " if port is 0, this is the name of the unix socket to use.",
+ .usage = "host_name",
+ },
+ COMMAND_REGISTRATION_DONE,
+};
+
+struct jtag_interface remote_bitbang_interface = {
+ .name = "remote_bitbang",
+ .execute_queue = &bitbang_execute_queue,
+ .speed = &remote_bitbang_speed,
+ .commands = remote_bitbang_command_handlers,
+ .init = &remote_bitbang_init,
+ .quit = &remote_bitbang_quit,
+ .khz = &remote_bitbang_khz,
+ .speed_div = &remote_bitbang_speed_div,
+};
diff --git a/src/jtag/interfaces.c b/src/jtag/interfaces.c
index dbc69d07..76a4e8d1 100644
--- a/src/jtag/interfaces.c
+++ b/src/jtag/interfaces.c
@@ -97,6 +97,9 @@ extern struct jtag_interface armjtagew_interface;
#if BUILD_BUSPIRATE == 1
extern struct jtag_interface buspirate_interface;
#endif
+#if BUILD_REMOTE_BITBANG == 1
+extern struct jtag_interface remote_bitbang_interface;
+#endif
#endif // standard drivers
/**
@@ -163,6 +166,9 @@ struct jtag_interface *jtag_interfaces[] = {
#if BUILD_BUSPIRATE == 1
&buspirate_interface,
#endif
+#if BUILD_REMOTE_BITBANG == 1
+ &remote_bitbang_interface,
+#endif
#endif // standard drivers
NULL,
};
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-10-20 23:55:56 +0000