2011-08-25 20:29:33 +00:00
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/***************************************************************************
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* Copyright (C) 2011 by Richard Uhler *
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* ruhler@mit.edu *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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2016-05-16 20:41:00 +00:00
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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2011-08-25 20:29:33 +00:00
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***************************************************************************/
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2012-02-02 15:08:51 +00:00
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2011-08-25 20:29:33 +00:00
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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2012-05-17 10:54:04 +00:00
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#ifndef _WIN32
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2011-08-25 20:29:33 +00:00
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#include <sys/un.h>
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#include <netdb.h>
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2012-05-17 10:54:04 +00:00
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#endif
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2021-04-19 20:04:30 +00:00
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#include "helper/system.h"
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#include "helper/replacements.h"
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2011-08-25 20:29:33 +00:00
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#include <jtag/interface.h>
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#include "bitbang.h"
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2012-02-02 15:08:51 +00:00
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/* arbitrary limit on host name length: */
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2011-08-25 20:29:33 +00:00
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#define REMOTE_BITBANG_HOST_MAX 255
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2013-05-05 21:58:32 +00:00
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static char *remote_bitbang_host;
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static char *remote_bitbang_port;
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2011-08-25 20:29:33 +00:00
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2017-12-13 21:13:22 +00:00
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static int remote_bitbang_fd;
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/* Circular buffer. When start == end, the buffer is empty. */
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static char remote_bitbang_buf[64];
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static unsigned remote_bitbang_start;
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static unsigned remote_bitbang_end;
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static int remote_bitbang_buf_full(void)
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{
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return remote_bitbang_end ==
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((remote_bitbang_start + sizeof(remote_bitbang_buf) - 1) %
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sizeof(remote_bitbang_buf));
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}
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2011-08-25 20:29:33 +00:00
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2017-12-13 21:13:22 +00:00
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/* Read any incoming data, placing it into the buffer. */
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static int remote_bitbang_fill_buf(void)
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2011-08-25 20:29:33 +00:00
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{
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2017-12-13 21:13:22 +00:00
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socket_nonblock(remote_bitbang_fd);
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while (!remote_bitbang_buf_full()) {
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unsigned contiguous_available_space;
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if (remote_bitbang_end >= remote_bitbang_start) {
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contiguous_available_space = sizeof(remote_bitbang_buf) -
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remote_bitbang_end;
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if (remote_bitbang_start == 0)
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contiguous_available_space -= 1;
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} else {
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contiguous_available_space = remote_bitbang_start -
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remote_bitbang_end - 1;
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}
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2021-03-12 07:07:13 +00:00
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ssize_t count = read_socket(remote_bitbang_fd,
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2017-12-13 21:13:22 +00:00
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remote_bitbang_buf + remote_bitbang_end,
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contiguous_available_space);
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if (count > 0) {
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remote_bitbang_end += count;
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if (remote_bitbang_end == sizeof(remote_bitbang_buf))
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remote_bitbang_end = 0;
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} else if (count == 0) {
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return ERROR_OK;
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} else if (count < 0) {
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2021-03-12 07:07:13 +00:00
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#ifdef _WIN32
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if (WSAGetLastError() == WSAEWOULDBLOCK) {
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#else
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2017-12-13 21:13:22 +00:00
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if (errno == EAGAIN) {
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2021-03-12 07:07:13 +00:00
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#endif
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2017-12-13 21:13:22 +00:00
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return ERROR_OK;
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} else {
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2021-03-12 07:07:13 +00:00
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log_socket_error("remote_bitbang_fill_buf");
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2017-12-13 21:13:22 +00:00
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return ERROR_FAIL;
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}
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}
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}
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return ERROR_OK;
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}
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static int remote_bitbang_putc(int c)
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{
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2021-03-12 07:07:13 +00:00
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char buf = c;
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ssize_t count = write_socket(remote_bitbang_fd, &buf, sizeof(buf));
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if (count < 0) {
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log_socket_error("remote_bitbang_putc");
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2017-12-13 21:13:22 +00:00
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return ERROR_FAIL;
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}
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return ERROR_OK;
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2011-08-25 20:29:33 +00:00
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}
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static int remote_bitbang_quit(void)
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{
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2021-03-12 07:07:13 +00:00
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if (remote_bitbang_putc('Q') == ERROR_FAIL)
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2011-08-25 20:29:33 +00:00
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return ERROR_FAIL;
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2012-02-02 15:08:51 +00:00
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2021-03-12 07:07:13 +00:00
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if (close_socket(remote_bitbang_fd) != 0) {
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log_socket_error("close_socket");
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2011-08-25 20:29:33 +00:00
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return ERROR_FAIL;
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}
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2013-05-05 21:58:32 +00:00
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free(remote_bitbang_host);
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free(remote_bitbang_port);
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2011-08-25 20:29:33 +00:00
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LOG_INFO("remote_bitbang interface quit");
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return ERROR_OK;
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}
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2017-12-13 21:13:22 +00:00
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static bb_value_t char_to_int(int c)
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2011-08-25 20:29:33 +00:00
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{
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switch (c) {
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2012-02-02 15:08:51 +00:00
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case '0':
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2017-12-13 21:13:22 +00:00
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return BB_LOW;
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2012-02-02 15:08:51 +00:00
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case '1':
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2017-12-13 21:13:22 +00:00
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return BB_HIGH;
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2011-08-25 20:29:33 +00:00
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default:
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remote_bitbang_quit();
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2017-12-13 21:13:22 +00:00
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LOG_ERROR("remote_bitbang: invalid read response: %c(%i)", c, c);
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return BB_ERROR;
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}
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}
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/* Get the next read response. */
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static bb_value_t remote_bitbang_rread(void)
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{
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/* Enable blocking access. */
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socket_block(remote_bitbang_fd);
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char c;
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2021-03-12 07:07:13 +00:00
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ssize_t count = read_socket(remote_bitbang_fd, &c, 1);
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2017-12-13 21:13:22 +00:00
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if (count == 1) {
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return char_to_int(c);
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} else {
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remote_bitbang_quit();
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2021-03-12 07:07:13 +00:00
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LOG_ERROR("read_socket: count=%d", (int) count);
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log_socket_error("read_socket");
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2017-12-13 21:13:22 +00:00
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return BB_ERROR;
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2011-08-25 20:29:33 +00:00
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}
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}
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2017-12-13 21:13:22 +00:00
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static int remote_bitbang_sample(void)
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2011-08-25 20:29:33 +00:00
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{
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2017-12-13 21:13:22 +00:00
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if (remote_bitbang_fill_buf() != ERROR_OK)
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return ERROR_FAIL;
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assert(!remote_bitbang_buf_full());
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return remote_bitbang_putc('R');
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}
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static bb_value_t remote_bitbang_read_sample(void)
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{
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if (remote_bitbang_start != remote_bitbang_end) {
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int c = remote_bitbang_buf[remote_bitbang_start];
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remote_bitbang_start =
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(remote_bitbang_start + 1) % sizeof(remote_bitbang_buf);
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return char_to_int(c);
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}
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2011-08-25 20:29:33 +00:00
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return remote_bitbang_rread();
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}
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2017-12-13 21:13:22 +00:00
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static int remote_bitbang_write(int tck, int tms, int tdi)
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2011-08-25 20:29:33 +00:00
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{
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char c = '0' + ((tck ? 0x4 : 0x0) | (tms ? 0x2 : 0x0) | (tdi ? 0x1 : 0x0));
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2017-12-13 21:13:22 +00:00
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return remote_bitbang_putc(c);
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2011-08-25 20:29:33 +00:00
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}
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2017-12-13 21:13:22 +00:00
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static int remote_bitbang_reset(int trst, int srst)
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2011-08-25 20:29:33 +00:00
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{
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char c = 'r' + ((trst ? 0x2 : 0x0) | (srst ? 0x1 : 0x0));
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2017-12-13 21:13:22 +00:00
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return remote_bitbang_putc(c);
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2011-08-25 20:29:33 +00:00
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}
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2017-12-13 21:13:22 +00:00
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static int remote_bitbang_blink(int on)
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2011-08-25 20:29:33 +00:00
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{
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char c = on ? 'B' : 'b';
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2017-12-13 21:13:22 +00:00
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return remote_bitbang_putc(c);
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2011-08-25 20:29:33 +00:00
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}
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static struct bitbang_interface remote_bitbang_bitbang = {
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2017-12-13 21:13:22 +00:00
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.buf_size = sizeof(remote_bitbang_buf) - 1,
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.sample = &remote_bitbang_sample,
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.read_sample = &remote_bitbang_read_sample,
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2011-08-25 20:29:33 +00:00
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.write = &remote_bitbang_write,
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.blink = &remote_bitbang_blink,
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};
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static int remote_bitbang_init_tcp(void)
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{
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2013-05-05 21:58:32 +00:00
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struct addrinfo hints = { .ai_family = AF_UNSPEC, .ai_socktype = SOCK_STREAM };
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struct addrinfo *result, *rp;
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2017-12-13 21:13:22 +00:00
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int fd = 0;
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2013-05-05 21:58:32 +00:00
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LOG_INFO("Connecting to %s:%s",
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remote_bitbang_host ? remote_bitbang_host : "localhost",
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remote_bitbang_port);
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/* Obtain address(es) matching host/port */
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int s = getaddrinfo(remote_bitbang_host, remote_bitbang_port, &hints, &result);
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if (s != 0) {
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LOG_ERROR("getaddrinfo: %s\n", gai_strerror(s));
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2011-08-25 20:29:33 +00:00
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return ERROR_FAIL;
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}
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2013-05-05 21:58:32 +00:00
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/* getaddrinfo() returns a list of address structures.
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Try each address until we successfully connect(2).
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If socket(2) (or connect(2)) fails, we (close the socket
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and) try the next address. */
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for (rp = result; rp != NULL ; rp = rp->ai_next) {
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fd = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
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if (fd == -1)
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continue;
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if (connect(fd, rp->ai_addr, rp->ai_addrlen) != -1)
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break; /* Success */
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close(fd);
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2011-08-25 20:29:33 +00:00
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}
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2013-05-05 21:58:32 +00:00
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freeaddrinfo(result); /* No longer needed */
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if (rp == NULL) { /* No address succeeded */
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2021-03-12 07:07:13 +00:00
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log_socket_error("Failed to connect");
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2011-08-25 20:29:33 +00:00
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return ERROR_FAIL;
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}
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2013-05-05 22:09:03 +00:00
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return fd;
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2011-08-25 20:29:33 +00:00
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}
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static int remote_bitbang_init_unix(void)
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{
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2013-05-05 21:58:32 +00:00
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if (remote_bitbang_host == NULL) {
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LOG_ERROR("host/socket not specified");
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return ERROR_FAIL;
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}
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2011-08-25 20:29:33 +00:00
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LOG_INFO("Connecting to unix socket %s", remote_bitbang_host);
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int fd = socket(PF_UNIX, SOCK_STREAM, 0);
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if (fd < 0) {
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2021-03-12 07:07:13 +00:00
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log_socket_error("socket");
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2011-08-25 20:29:33 +00:00
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return ERROR_FAIL;
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}
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struct sockaddr_un addr;
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addr.sun_family = AF_UNIX;
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2014-04-06 04:36:37 +00:00
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strncpy(addr.sun_path, remote_bitbang_host, sizeof(addr.sun_path));
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addr.sun_path[sizeof(addr.sun_path)-1] = '\0';
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2011-08-25 20:29:33 +00:00
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2012-02-02 15:08:51 +00:00
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if (connect(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0) {
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2021-03-12 07:07:13 +00:00
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log_socket_error("connect");
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2011-08-25 20:29:33 +00:00
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return ERROR_FAIL;
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}
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2013-05-05 22:09:03 +00:00
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return fd;
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}
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static int remote_bitbang_init(void)
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{
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bitbang_interface = &remote_bitbang_bitbang;
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2017-12-13 21:13:22 +00:00
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remote_bitbang_start = 0;
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remote_bitbang_end = 0;
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2013-05-05 22:09:03 +00:00
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LOG_INFO("Initializing remote_bitbang driver");
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if (remote_bitbang_port == NULL)
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2017-12-13 21:13:22 +00:00
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remote_bitbang_fd = remote_bitbang_init_unix();
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2013-05-05 22:09:03 +00:00
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else
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2017-12-13 21:13:22 +00:00
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remote_bitbang_fd = remote_bitbang_init_tcp();
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2013-05-05 22:09:03 +00:00
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2017-12-13 21:13:22 +00:00
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if (remote_bitbang_fd < 0)
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return remote_bitbang_fd;
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2011-08-25 20:29:33 +00:00
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LOG_INFO("remote_bitbang driver initialized");
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return ERROR_OK;
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}
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COMMAND_HANDLER(remote_bitbang_handle_remote_bitbang_port_command)
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{
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if (CMD_ARGC == 1) {
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2013-05-05 21:58:32 +00:00
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uint16_t port;
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COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port);
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free(remote_bitbang_port);
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remote_bitbang_port = port == 0 ? NULL : strdup(CMD_ARGV[0]);
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2011-08-25 20:29:33 +00:00
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return ERROR_OK;
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}
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return ERROR_COMMAND_SYNTAX_ERROR;
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}
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COMMAND_HANDLER(remote_bitbang_handle_remote_bitbang_host_command)
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{
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|
if (CMD_ARGC == 1) {
|
2013-05-05 21:58:32 +00:00
|
|
|
free(remote_bitbang_host);
|
|
|
|
remote_bitbang_host = strdup(CMD_ARGV[0]);
|
2011-08-25 20:29:33 +00:00
|
|
|
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"
|
2013-05-05 21:58:32 +00:00
|
|
|
" if 0 or unset, use unix sockets to connect to the remote jtag.",
|
2011-08-25 20:29:33 +00:00
|
|
|
.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"
|
2013-05-05 21:58:32 +00:00
|
|
|
" if port is 0 or unset, this is the name of the unix socket to use.",
|
2011-08-25 20:29:33 +00:00
|
|
|
.usage = "host_name",
|
|
|
|
},
|
|
|
|
COMMAND_REGISTRATION_DONE,
|
|
|
|
};
|
|
|
|
|
2019-01-22 15:31:18 +00:00
|
|
|
static struct jtag_interface remote_bitbang_interface = {
|
2011-08-25 20:29:33 +00:00
|
|
|
.execute_queue = &bitbang_execute_queue,
|
2019-01-22 15:31:18 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
struct adapter_driver remote_bitbang_adapter_driver = {
|
|
|
|
.name = "remote_bitbang",
|
2019-01-22 15:03:15 +00:00
|
|
|
.transports = jtag_only,
|
2011-08-25 20:29:33 +00:00
|
|
|
.commands = remote_bitbang_command_handlers,
|
2019-01-22 15:31:18 +00:00
|
|
|
|
2011-08-25 20:29:33 +00:00
|
|
|
.init = &remote_bitbang_init,
|
|
|
|
.quit = &remote_bitbang_quit,
|
2019-09-04 14:47:24 +00:00
|
|
|
.reset = &remote_bitbang_reset,
|
2019-01-22 15:31:18 +00:00
|
|
|
|
|
|
|
.jtag_ops = &remote_bitbang_interface,
|
2011-08-25 20:29:33 +00:00
|
|
|
};
|