47a276cfae
Change-Id: I591308bd98810ef6361106c207c55b83c3a83890 Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk> Reviewed-on: http://openocd.zylin.com/647 Tested-by: jenkins Reviewed-by: Xiaofan <xiaofanc@gmail.com>
298 lines
8.1 KiB
C
298 lines
8.1 KiB
C
/***************************************************************************
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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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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netdb.h>
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#include <jtag/interface.h>
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#include "bitbang.h"
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/* from unix man page and sys/un.h: */
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#define UNIX_PATH_MAX 108
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/* arbitrary limit on host name length: */
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#define REMOTE_BITBANG_HOST_MAX 255
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#define REMOTE_BITBANG_RAISE_ERROR(expr ...) \
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do { \
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LOG_ERROR(expr); \
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LOG_ERROR("Terminating openocd."); \
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exit(-1); \
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} while (0)
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static char remote_bitbang_host[REMOTE_BITBANG_HOST_MAX] = "openocd";
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static uint16_t remote_bitbang_port;
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FILE *remote_bitbang_in;
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FILE *remote_bitbang_out;
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static void remote_bitbang_putc(int c)
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{
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if (EOF == fputc(c, remote_bitbang_out))
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REMOTE_BITBANG_RAISE_ERROR("remote_bitbang_putc: %s", strerror(errno));
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}
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static int remote_bitbang_quit(void)
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{
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if (EOF == fputc('Q', remote_bitbang_out)) {
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LOG_ERROR("fputs: %s", strerror(errno));
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return ERROR_FAIL;
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}
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if (EOF == fflush(remote_bitbang_out)) {
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LOG_ERROR("fflush: %s", strerror(errno));
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return ERROR_FAIL;
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}
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/* We only need to close one of the FILE*s, because they both use the same */
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/* underlying file descriptor. */
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if (EOF == fclose(remote_bitbang_out)) {
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LOG_ERROR("fclose: %s", strerror(errno));
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return ERROR_FAIL;
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}
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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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/* Get the next read response. */
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static int remote_bitbang_rread(void)
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{
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if (EOF == fflush(remote_bitbang_out)) {
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remote_bitbang_quit();
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REMOTE_BITBANG_RAISE_ERROR("fflush: %s", strerror(errno));
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}
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int c = fgetc(remote_bitbang_in);
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switch (c) {
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case '0':
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return 0;
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case '1':
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return 1;
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default:
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remote_bitbang_quit();
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REMOTE_BITBANG_RAISE_ERROR(
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"remote_bitbang: invalid read response: %c(%i)", c, c);
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}
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}
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static int remote_bitbang_read(void)
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{
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remote_bitbang_putc('R');
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return remote_bitbang_rread();
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}
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static void remote_bitbang_write(int tck, int tms, int tdi)
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{
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char c = '0' + ((tck ? 0x4 : 0x0) | (tms ? 0x2 : 0x0) | (tdi ? 0x1 : 0x0));
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remote_bitbang_putc(c);
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}
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static void remote_bitbang_reset(int trst, int srst)
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{
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char c = 'r' + ((trst ? 0x2 : 0x0) | (srst ? 0x1 : 0x0));
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remote_bitbang_putc(c);
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}
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static void remote_bitbang_blink(int on)
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{
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char c = on ? 'B' : 'b';
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remote_bitbang_putc(c);
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}
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static struct bitbang_interface remote_bitbang_bitbang = {
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.read = &remote_bitbang_read,
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.write = &remote_bitbang_write,
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.reset = &remote_bitbang_reset,
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.blink = &remote_bitbang_blink,
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};
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static int remote_bitbang_speed(int speed)
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{
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return ERROR_OK;
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}
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static int remote_bitbang_init_tcp(void)
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{
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LOG_INFO("Connecting to %s:%i", remote_bitbang_host, remote_bitbang_port);
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int fd = socket(PF_INET, SOCK_STREAM, 0);
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if (fd < 0) {
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LOG_ERROR("socket: %s", strerror(errno));
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return ERROR_FAIL;
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}
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struct hostent *hent = gethostbyname(remote_bitbang_host);
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if (hent == NULL) {
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char *errorstr = "???";
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switch (h_errno) {
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case HOST_NOT_FOUND:
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errorstr = "host not found";
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break;
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case NO_ADDRESS:
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errorstr = "no address";
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break;
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case NO_RECOVERY:
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errorstr = "no recovery";
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break;
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case TRY_AGAIN:
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errorstr = "try again";
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break;
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}
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LOG_ERROR("gethostbyname: %s", errorstr);
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return ERROR_FAIL;
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}
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struct sockaddr_in addr;
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addr.sin_family = AF_INET;
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addr.sin_port = htons(remote_bitbang_port);
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addr.sin_addr = *(struct in_addr *)hent->h_addr;
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if (connect(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr_in)) < 0) {
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LOG_ERROR("connect: %s", strerror(errno));
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return ERROR_FAIL;
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}
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remote_bitbang_in = fdopen(fd, "r");
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if (remote_bitbang_in == NULL) {
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LOG_ERROR("fdopen: failed to open read stream");
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return ERROR_FAIL;
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}
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remote_bitbang_out = fdopen(fd, "w");
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if (remote_bitbang_out == NULL) {
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LOG_ERROR("fdopen: failed to open write stream");
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return ERROR_FAIL;
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}
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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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static int remote_bitbang_init_unix(void)
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{
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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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LOG_ERROR("socket: %s", strerror(errno));
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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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strncpy(addr.sun_path, remote_bitbang_host, UNIX_PATH_MAX);
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addr.sun_path[UNIX_PATH_MAX-1] = '\0';
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if (connect(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr_un)) < 0) {
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LOG_ERROR("connect: %s", strerror(errno));
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return ERROR_FAIL;
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}
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remote_bitbang_in = fdopen(fd, "r");
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if (remote_bitbang_in == NULL) {
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LOG_ERROR("fdopen: failed to open read stream");
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return ERROR_FAIL;
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}
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remote_bitbang_out = fdopen(fd, "w");
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if (remote_bitbang_out == NULL) {
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LOG_ERROR("fdopen: failed to open write stream");
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return ERROR_FAIL;
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}
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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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static int remote_bitbang_init(void)
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{
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bitbang_interface = &remote_bitbang_bitbang;
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LOG_INFO("Initializing remote_bitbang driver");
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if (remote_bitbang_port == 0)
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return remote_bitbang_init_unix();
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return remote_bitbang_init_tcp();
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}
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static int remote_bitbang_khz(int khz, int *jtag_speed)
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{
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*jtag_speed = 0;
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return ERROR_OK;
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}
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static int remote_bitbang_speed_div(int speed, int *khz)
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{
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/* I don't think this really matters any. */
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*khz = 1;
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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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COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], remote_bitbang_port);
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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) {
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strncpy(remote_bitbang_host, CMD_ARGV[0], REMOTE_BITBANG_HOST_MAX);
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remote_bitbang_host[REMOTE_BITBANG_HOST_MAX-1] = '\0';
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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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static const struct command_registration remote_bitbang_command_handlers[] = {
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{
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.name = "remote_bitbang_port",
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.handler = remote_bitbang_handle_remote_bitbang_port_command,
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.mode = COMMAND_CONFIG,
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.help = "Set the port to use to connect to the remote jtag.\n"
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" if 0, use unix sockets to connect to the remote jtag.",
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.usage = "port_number",
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},
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{
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.name = "remote_bitbang_host",
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.handler = remote_bitbang_handle_remote_bitbang_host_command,
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.mode = COMMAND_CONFIG,
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.help = "Set the host to use to connect to the remote jtag.\n"
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" if port is 0, this is the name of the unix socket to use.",
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.usage = "host_name",
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},
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COMMAND_REGISTRATION_DONE,
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};
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struct jtag_interface remote_bitbang_interface = {
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.name = "remote_bitbang",
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.execute_queue = &bitbang_execute_queue,
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.speed = &remote_bitbang_speed,
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.commands = remote_bitbang_command_handlers,
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.init = &remote_bitbang_init,
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.quit = &remote_bitbang_quit,
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.khz = &remote_bitbang_khz,
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.speed_div = &remote_bitbang_speed_div,
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};
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