1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
732 lines
15 KiB
C
732 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2008-2009 Semihalf, Michal Hajduk and Bartlomiej Sieka
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <errno.h>
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#include <sysexits.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <dev/iicbus/iic.h>
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#define I2C_DEV "/dev/iic0"
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#define I2C_MODE_NOTSET 0
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#define I2C_MODE_NONE 1
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#define I2C_MODE_STOP_START 2
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#define I2C_MODE_REPEATED_START 3
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struct options {
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int width;
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int count;
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int verbose;
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int addr_set;
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int binary;
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int scan;
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int skip;
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int reset;
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int mode;
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char dir;
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uint32_t addr;
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uint32_t off;
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};
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struct skip_range {
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int start;
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int end;
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};
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__dead2 static void
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usage(void)
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{
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fprintf(stderr, "usage: %s -a addr [-f device] [-d [r|w]] [-o offset] "
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"[-w [0|8|16]] [-c count] [-m [ss|rs|no]] [-b] [-v]\n",
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getprogname());
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fprintf(stderr, " %s -s [-f device] [-n skip_addr] -v\n",
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getprogname());
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fprintf(stderr, " %s -r [-f device] -v\n", getprogname());
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exit(EX_USAGE);
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}
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static struct skip_range
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skip_get_range(char *skip_addr)
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{
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struct skip_range addr_range;
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char *token;
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addr_range.start = 0;
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addr_range.end = 0;
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token = strsep(&skip_addr, "..");
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if (token) {
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addr_range.start = strtoul(token, 0, 16);
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token = strsep(&skip_addr, "..");
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if ((token != NULL) && !atoi(token)) {
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token = strsep(&skip_addr, "..");
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if (token)
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addr_range.end = strtoul(token, 0, 16);
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}
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}
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return (addr_range);
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}
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/* Parse the string to get hex 7 bits addresses */
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static int
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skip_get_tokens(char *skip_addr, int *sk_addr, int max_index)
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{
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char *token;
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int i;
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for (i = 0; i < max_index; i++) {
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token = strsep(&skip_addr, ":");
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if (token == NULL)
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break;
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sk_addr[i] = strtoul(token, 0, 16);
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}
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return (i);
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}
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static int
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scan_bus(struct iiccmd cmd, char *dev, int skip, char *skip_addr)
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{
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struct iic_msg rdmsg;
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struct iic_rdwr_data rdwrdata;
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struct skip_range addr_range = { 0, 0 };
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int *tokens, fd, error, i, index, j;
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int len = 0, do_skip = 0, no_range = 1, num_found = 0, use_read_xfer = 0;
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uint8_t rdbyte;
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fd = open(dev, O_RDWR);
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if (fd == -1) {
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fprintf(stderr, "Error opening I2C controller (%s) for "
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"scanning: %s\n", dev, strerror(errno));
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return (EX_NOINPUT);
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}
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if (skip) {
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len = strlen(skip_addr);
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if (strstr(skip_addr, "..") != NULL) {
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addr_range = skip_get_range(skip_addr);
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no_range = 0;
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} else {
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tokens = (int *)malloc((len / 2 + 1) * sizeof(int));
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if (tokens == NULL) {
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fprintf(stderr, "Error allocating tokens "
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"buffer\n");
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error = -1;
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goto out;
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}
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index = skip_get_tokens(skip_addr, tokens,
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len / 2 + 1);
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}
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if (!no_range && (addr_range.start > addr_range.end)) {
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fprintf(stderr, "Skip address out of range\n");
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error = -1;
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goto out;
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}
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}
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printf("Scanning I2C devices on %s: ", dev);
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start_over:
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if (use_read_xfer) {
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fprintf(stderr,
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"Hardware may not support START/STOP scanning; "
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"trying less-reliable read method.\n");
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}
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for (i = 1; i < 127; i++) {
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if (skip && ( addr_range.start < addr_range.end)) {
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if (i >= addr_range.start && i <= addr_range.end)
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continue;
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} else if (skip && no_range)
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for (j = 0; j < index; j++) {
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if (tokens[j] == i) {
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do_skip = 1;
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break;
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}
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}
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if (do_skip) {
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do_skip = 0;
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continue;
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}
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cmd.slave = i << 1;
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cmd.last = 1;
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cmd.count = 0;
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error = ioctl(fd, I2CRSTCARD, &cmd);
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if (error) {
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fprintf(stderr, "Controller reset failed\n");
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goto out;
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}
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if (use_read_xfer) {
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rdmsg.buf = &rdbyte;
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rdmsg.len = 1;
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rdmsg.flags = IIC_M_RD;
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rdmsg.slave = i << 1;
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rdwrdata.msgs = &rdmsg;
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rdwrdata.nmsgs = 1;
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error = ioctl(fd, I2CRDWR, &rdwrdata);
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} else {
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cmd.slave = i << 1;
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cmd.last = 1;
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error = ioctl(fd, I2CSTART, &cmd);
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if (errno == ENODEV || errno == EOPNOTSUPP) {
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/* If START not supported try reading. */
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use_read_xfer = 1;
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goto start_over;
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}
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ioctl(fd, I2CSTOP);
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}
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if (error == 0) {
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++num_found;
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printf("%02x ", i);
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}
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}
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/*
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* If we found nothing, maybe START is not supported and returns a
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* generic error code such as EIO or ENXIO, so try again using reads.
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*/
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if (num_found == 0) {
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if (!use_read_xfer) {
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use_read_xfer = 1;
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goto start_over;
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}
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printf("<none found>");
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}
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printf("\n");
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error = ioctl(fd, I2CRSTCARD, &cmd);
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out:
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close(fd);
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if (skip && no_range)
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free(tokens);
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if (error) {
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fprintf(stderr, "Error scanning I2C controller (%s): %s\n",
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dev, strerror(errno));
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return (EX_NOINPUT);
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} else
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return (EX_OK);
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}
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static int
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reset_bus(struct iiccmd cmd, char *dev)
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{
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int fd, error;
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fd = open(dev, O_RDWR);
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if (fd == -1) {
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fprintf(stderr, "Error opening I2C controller (%s) for "
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"resetting: %s\n", dev, strerror(errno));
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return (EX_NOINPUT);
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}
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printf("Resetting I2C controller on %s: ", dev);
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error = ioctl(fd, I2CRSTCARD, &cmd);
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close (fd);
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if (error) {
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printf("error: %s\n", strerror(errno));
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return (EX_IOERR);
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} else {
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printf("OK\n");
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return (EX_OK);
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}
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}
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static char *
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prepare_buf(int size, uint32_t off)
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{
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char *buf;
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buf = malloc(size);
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if (buf == NULL)
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return (buf);
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if (size == 1)
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buf[0] = off & 0xff;
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else if (size == 2) {
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buf[0] = (off >> 8) & 0xff;
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buf[1] = off & 0xff;
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}
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return (buf);
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}
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static int
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i2c_write(char *dev, struct options i2c_opt, char *i2c_buf)
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{
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struct iiccmd cmd;
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int ch, i, error, fd, bufsize;
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char *err_msg, *buf;
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/*
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* Read data to be written to the chip from stdin
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*/
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if (i2c_opt.verbose && !i2c_opt.binary)
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fprintf(stderr, "Enter %u bytes of data: ", i2c_opt.count);
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for (i = 0; i < i2c_opt.count; i++) {
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ch = getchar();
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if (ch == EOF) {
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free(i2c_buf);
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err(1, "not enough data, exiting\n");
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}
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i2c_buf[i] = ch;
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}
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fd = open(dev, O_RDWR);
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if (fd == -1) {
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free(i2c_buf);
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err(1, "open failed");
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}
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cmd.slave = i2c_opt.addr;
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error = ioctl(fd, I2CSTART, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error sending start condition";
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goto err1;
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}
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if (i2c_opt.width) {
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bufsize = i2c_opt.width / 8;
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buf = prepare_buf(bufsize, i2c_opt.off);
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if (buf == NULL) {
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err_msg = "error: offset malloc";
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goto err1;
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}
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} else {
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bufsize = 0;
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buf = NULL;
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}
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switch(i2c_opt.mode) {
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case I2C_MODE_STOP_START:
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/*
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* Write offset where the data will go
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*/
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if (i2c_opt.width) {
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cmd.count = bufsize;
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cmd.buf = buf;
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error = ioctl(fd, I2CWRITE, &cmd);
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free(buf);
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if (error == -1) {
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err_msg = "ioctl: error writing offset";
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goto err1;
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}
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}
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error = ioctl(fd, I2CSTOP);
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if (error == -1) {
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err_msg = "ioctl: error sending stop condition";
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goto err2;
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}
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cmd.slave = i2c_opt.addr;
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error = ioctl(fd, I2CSTART, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error sending start condition";
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goto err1;
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}
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/*
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* Write the data
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*/
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cmd.count = i2c_opt.count;
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cmd.buf = i2c_buf;
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cmd.last = 0;
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error = ioctl(fd, I2CWRITE, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error writing";
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goto err1;
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}
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break;
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case I2C_MODE_REPEATED_START:
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/*
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* Write offset where the data will go
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*/
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if (i2c_opt.width) {
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cmd.count = bufsize;
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cmd.buf = buf;
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error = ioctl(fd, I2CWRITE, &cmd);
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free(buf);
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if (error == -1) {
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err_msg = "ioctl: error writing offset";
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goto err1;
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}
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}
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cmd.slave = i2c_opt.addr;
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error = ioctl(fd, I2CRPTSTART, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error sending repeated start "
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"condition";
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goto err1;
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}
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/*
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* Write the data
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*/
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cmd.count = i2c_opt.count;
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cmd.buf = i2c_buf;
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cmd.last = 0;
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error = ioctl(fd, I2CWRITE, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error writing";
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goto err1;
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}
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break;
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case I2C_MODE_NONE: /* fall through */
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default:
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buf = realloc(buf, bufsize + i2c_opt.count);
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if (buf == NULL) {
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err_msg = "error: data malloc";
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goto err1;
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}
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memcpy(buf + bufsize, i2c_buf, i2c_opt.count);
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/*
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* Write offset and data
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*/
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cmd.count = bufsize + i2c_opt.count;
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cmd.buf = buf;
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cmd.last = 0;
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error = ioctl(fd, I2CWRITE, &cmd);
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free(buf);
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if (error == -1) {
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err_msg = "ioctl: error writing";
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goto err1;
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}
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break;
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}
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error = ioctl(fd, I2CSTOP);
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if (error == -1) {
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err_msg = "ioctl: error sending stop condition";
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goto err2;
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}
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close(fd);
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return (0);
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err1:
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error = ioctl(fd, I2CSTOP);
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if (error == -1)
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fprintf(stderr, "error sending stop condition\n");
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err2:
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if (err_msg)
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fprintf(stderr, "%s\n", err_msg);
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close(fd);
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return (1);
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}
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static int
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i2c_read(char *dev, struct options i2c_opt, char *i2c_buf)
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{
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struct iiccmd cmd;
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int fd, error, bufsize;
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char *err_msg, data = 0, *buf;
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fd = open(dev, O_RDWR);
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if (fd == -1)
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err(1, "open failed");
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bzero(&cmd, sizeof(cmd));
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if (i2c_opt.width) {
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cmd.slave = i2c_opt.addr;
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cmd.count = 1;
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cmd.last = 0;
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cmd.buf = &data;
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error = ioctl(fd, I2CSTART, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error sending start condition";
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goto err1;
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}
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bufsize = i2c_opt.width / 8;
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buf = prepare_buf(bufsize, i2c_opt.off);
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if (buf == NULL) {
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err_msg = "error: offset malloc";
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goto err1;
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}
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cmd.count = bufsize;
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cmd.buf = buf;
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cmd.last = 0;
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error = ioctl(fd, I2CWRITE, &cmd);
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free(buf);
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if (error == -1) {
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err_msg = "ioctl: error writing offset";
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goto err1;
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}
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if (i2c_opt.mode == I2C_MODE_STOP_START) {
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error = ioctl(fd, I2CSTOP);
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if (error == -1) {
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err_msg = "error sending stop condition";
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goto err2;
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}
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}
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}
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cmd.slave = i2c_opt.addr | 1;
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cmd.count = 1;
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cmd.last = 0;
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cmd.buf = &data;
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if (i2c_opt.mode == I2C_MODE_STOP_START || i2c_opt.width == 0) {
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error = ioctl(fd, I2CSTART, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error sending start condition";
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goto err2;
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}
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} else if (i2c_opt.mode == I2C_MODE_REPEATED_START) {
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error = ioctl(fd, I2CRPTSTART, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error sending repeated start "
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"condition";
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goto err1;
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}
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}
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cmd.count = i2c_opt.count;
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cmd.buf = i2c_buf;
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cmd.last = 1;
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error = ioctl(fd, I2CREAD, &cmd);
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if (error == -1) {
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err_msg = "ioctl: error while reading";
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goto err1;
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}
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error = ioctl(fd, I2CSTOP);
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if (error == -1) {
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err_msg = "error sending stop condtion\n";
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goto err2;
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}
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|
|
|
close(fd);
|
|
return (0);
|
|
|
|
err1:
|
|
error = ioctl(fd, I2CSTOP);
|
|
if (error == -1)
|
|
fprintf(stderr, "error sending stop condition\n");
|
|
err2:
|
|
if (err_msg)
|
|
fprintf(stderr, "%s\n", err_msg);
|
|
|
|
close(fd);
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char** argv)
|
|
{
|
|
struct iiccmd cmd;
|
|
struct options i2c_opt;
|
|
char *dev, *skip_addr, *i2c_buf;
|
|
int error, chunk_size, i, j, ch;
|
|
|
|
errno = 0;
|
|
error = 0;
|
|
|
|
/* Line-break the output every chunk_size bytes */
|
|
chunk_size = 16;
|
|
|
|
dev = I2C_DEV;
|
|
|
|
/* Default values */
|
|
i2c_opt.addr_set = 0;
|
|
i2c_opt.off = 0;
|
|
i2c_opt.verbose = 0;
|
|
i2c_opt.dir = 'r'; /* direction = read */
|
|
i2c_opt.width = 8;
|
|
i2c_opt.count = 1;
|
|
i2c_opt.binary = 0; /* ASCII text output */
|
|
i2c_opt.scan = 0; /* no bus scan */
|
|
i2c_opt.skip = 0; /* scan all addresses */
|
|
i2c_opt.reset = 0; /* no bus reset */
|
|
i2c_opt.mode = I2C_MODE_NOTSET;
|
|
|
|
while ((ch = getopt(argc, argv, "a:f:d:o:w:c:m:n:sbvrh")) != -1) {
|
|
switch(ch) {
|
|
case 'a':
|
|
i2c_opt.addr = (strtoul(optarg, 0, 16) << 1);
|
|
if (i2c_opt.addr == 0 && errno == EINVAL)
|
|
i2c_opt.addr_set = 0;
|
|
else
|
|
i2c_opt.addr_set = 1;
|
|
break;
|
|
case 'f':
|
|
dev = optarg;
|
|
break;
|
|
case 'd':
|
|
i2c_opt.dir = optarg[0];
|
|
break;
|
|
case 'o':
|
|
i2c_opt.off = strtoul(optarg, 0, 16);
|
|
if (i2c_opt.off == 0 && errno == EINVAL)
|
|
error = 1;
|
|
break;
|
|
case 'w':
|
|
i2c_opt.width = atoi(optarg);
|
|
break;
|
|
case 'c':
|
|
i2c_opt.count = atoi(optarg);
|
|
break;
|
|
case 'm':
|
|
if (!strcmp(optarg, "no"))
|
|
i2c_opt.mode = I2C_MODE_NONE;
|
|
else if (!strcmp(optarg, "ss"))
|
|
i2c_opt.mode = I2C_MODE_STOP_START;
|
|
else if (!strcmp(optarg, "rs"))
|
|
i2c_opt.mode = I2C_MODE_REPEATED_START;
|
|
else
|
|
usage();
|
|
break;
|
|
case 'n':
|
|
i2c_opt.skip = 1;
|
|
skip_addr = optarg;
|
|
break;
|
|
case 's':
|
|
i2c_opt.scan = 1;
|
|
break;
|
|
case 'b':
|
|
i2c_opt.binary = 1;
|
|
break;
|
|
case 'v':
|
|
i2c_opt.verbose = 1;
|
|
break;
|
|
case 'r':
|
|
i2c_opt.reset = 1;
|
|
break;
|
|
case 'h':
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
/* Set default mode if option -m is not specified */
|
|
if (i2c_opt.mode == I2C_MODE_NOTSET) {
|
|
if (i2c_opt.dir == 'r')
|
|
i2c_opt.mode = I2C_MODE_STOP_START;
|
|
else if (i2c_opt.dir == 'w')
|
|
i2c_opt.mode = I2C_MODE_NONE;
|
|
}
|
|
|
|
/* Basic sanity check of command line arguments */
|
|
if (i2c_opt.scan) {
|
|
if (i2c_opt.addr_set)
|
|
usage();
|
|
} else if (i2c_opt.reset) {
|
|
if (i2c_opt.addr_set)
|
|
usage();
|
|
} else if (error) {
|
|
usage();
|
|
} else if ((i2c_opt.dir == 'r' || i2c_opt.dir == 'w')) {
|
|
if ((i2c_opt.addr_set == 0) ||
|
|
!(i2c_opt.width == 0 || i2c_opt.width == 8 ||
|
|
i2c_opt.width == 16))
|
|
usage();
|
|
}
|
|
|
|
if (i2c_opt.verbose)
|
|
fprintf(stderr, "dev: %s, addr: 0x%x, r/w: %c, "
|
|
"offset: 0x%02x, width: %u, count: %u\n", dev,
|
|
i2c_opt.addr >> 1, i2c_opt.dir, i2c_opt.off,
|
|
i2c_opt.width, i2c_opt.count);
|
|
|
|
if (i2c_opt.scan)
|
|
exit(scan_bus(cmd, dev, i2c_opt.skip, skip_addr));
|
|
|
|
if (i2c_opt.reset)
|
|
exit(reset_bus(cmd, dev));
|
|
|
|
i2c_buf = malloc(i2c_opt.count);
|
|
if (i2c_buf == NULL)
|
|
err(1, "data malloc");
|
|
|
|
if (i2c_opt.dir == 'w') {
|
|
error = i2c_write(dev, i2c_opt, i2c_buf);
|
|
if (error) {
|
|
free(i2c_buf);
|
|
return (1);
|
|
}
|
|
}
|
|
if (i2c_opt.dir == 'r') {
|
|
error = i2c_read(dev, i2c_opt, i2c_buf);
|
|
if (error) {
|
|
free(i2c_buf);
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
if (i2c_opt.verbose)
|
|
fprintf(stderr, "\nData %s (hex):\n", i2c_opt.dir == 'r' ?
|
|
"read" : "written");
|
|
|
|
i = 0;
|
|
j = 0;
|
|
while (i < i2c_opt.count) {
|
|
if (i2c_opt.verbose || (i2c_opt.dir == 'r' &&
|
|
!i2c_opt.binary))
|
|
fprintf (stderr, "%02hhx ", i2c_buf[i++]);
|
|
|
|
if (i2c_opt.dir == 'r' && i2c_opt.binary) {
|
|
fprintf(stdout, "%c", i2c_buf[j++]);
|
|
if(!i2c_opt.verbose)
|
|
i++;
|
|
}
|
|
if (!i2c_opt.verbose && (i2c_opt.dir == 'w'))
|
|
break;
|
|
if ((i % chunk_size) == 0)
|
|
fprintf(stderr, "\n");
|
|
}
|
|
if ((i % chunk_size) != 0)
|
|
fprintf(stderr, "\n");
|
|
|
|
free(i2c_buf);
|
|
return (0);
|
|
}
|