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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.
346 lines
8.5 KiB
C
346 lines
8.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2004 Joerg Wunsch
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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 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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* $FreeBSD$
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*/
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/*
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* Send or receive messages over an SMBus.
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*/
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#include <err.h>
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#include <errno.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 <sysexits.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <dev/smbus/smb.h>
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#include "pathnames.h"
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static const char *dev = PATH_DEFAULTSMBDEV;
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static const char *bytefmt = "0x%02x";
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static const char *wordfmt = "0x%04x";
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static const char *fmt;
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static int fd; /* file descriptor for /dev/smbX */
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static int cflag = -1; /* SMBus cmd */
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static int iflag = -1; /* input data */
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static int oflag = -1; /* output data */
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static int pflag; /* probe bus */
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static int slave = -1; /* slave address */
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static int wflag; /* word IO */
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static unsigned char ibuf[SMB_MAXBLOCKSIZE];
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static unsigned char obuf[SMB_MAXBLOCKSIZE];
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static unsigned short oword;
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/*
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* The I2C specs say that all addresses below 16 and above or equal
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* 240 are reserved. Address 0 is the global address, but we do not
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* care for this detail.
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*/
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#define MIN_I2C_ADDR 16
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#define MAX_I2C_ADDR 240
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static int do_io(void);
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static int getnum(const char *s);
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static void probe_i2c(void);
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static void usage(void);
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: smbmsg [-f dev] -p\n"
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" smbmsg [-f dev] -s slave [-F fmt] [-c cmd] [-w] "
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"[-i incnt] [-o outcnt] [outdata ...]\n");
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exit(EX_USAGE);
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}
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static int
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getnum(const char *s)
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{
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char *endp;
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unsigned long l;
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l = strtoul(s, &endp, 0);
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if (*s != '\0' && *endp == '\0')
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return (int)l;
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return (-1);
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}
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static void
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probe_i2c(void)
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{
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unsigned char addr;
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int flags;
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#define IS_READABLE 1
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#define IS_WRITEABLE 2
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struct smbcmd c;
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printf("Probing for devices on %s:\n", dev);
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for (addr = MIN_I2C_ADDR; addr < MAX_I2C_ADDR; addr += 2) {
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c.slave = addr;
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flags = 0;
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if (ioctl(fd, SMB_RECVB, &c) != -1)
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flags = IS_READABLE;
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if (ioctl(fd, SMB_QUICK_WRITE, &c) != -1)
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flags |= IS_WRITEABLE;
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if (flags != 0) {
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printf("Device @0x%02x: ", addr);
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if (flags & IS_READABLE)
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putchar('r');
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if (flags & IS_WRITEABLE)
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putchar('w');
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putchar('\n');
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}
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}
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}
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static int
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do_io(void)
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{
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struct smbcmd c;
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int i;
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c.slave = slave;
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c.cmd = cflag;
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c.rcount = 0;
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c.wcount = 0;
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if (fmt == NULL && iflag > 0)
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fmt = wflag? wordfmt: bytefmt;
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if (cflag == -1) {
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/* operations that do not require a command byte */
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if (iflag == -1 && oflag == 0)
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/* 0 bytes output: quick write operation */
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return (ioctl(fd, SMB_QUICK_WRITE, &c));
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else if (iflag == 0 && oflag == -1)
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/* 0 bytes input: quick read operation */
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return (ioctl(fd, SMB_QUICK_READ, &c));
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else if (iflag == 1 && oflag == -1) {
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/* no command, 1 byte input: receive byte op. */
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if (ioctl(fd, SMB_RECVB, &c) == -1)
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return (-1);
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printf(fmt, (unsigned char)c.cmd);
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putchar('\n');
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return (0);
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} else if (iflag == -1 && oflag == 1) {
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/* no command, 1 byte output: send byte op. */
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c.cmd = obuf[0];
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return (ioctl(fd, SMB_SENDB, &c));
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} else
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return (-2);
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}
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if (iflag == 1 && oflag == -1) {
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/* command + 1 byte input: read byte op. */
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if (ioctl(fd, SMB_READB, &c) == -1)
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return (-1);
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printf(fmt, (unsigned char)c.rdata.byte);
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putchar('\n');
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return (0);
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} else if (iflag == -1 && oflag == 1) {
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/* command + 1 byte output: write byte op. */
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c.wdata.byte = obuf[0];
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return (ioctl(fd, SMB_WRITEB, &c));
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} else if (wflag && iflag == 2 && oflag == -1) {
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/* command + 2 bytes input: read word op. */
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if (ioctl(fd, SMB_READW, &c) == -1)
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return (-1);
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printf(fmt, (unsigned short)c.rdata.word);
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putchar('\n');
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return (0);
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} else if (wflag && iflag == -1 && oflag == 2) {
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/* command + 2 bytes output: write word op. */
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c.wdata.word = oword;
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return (ioctl(fd, SMB_WRITEW, &c));
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} else if (wflag && iflag == 2 && oflag == 2) {
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/*
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* command + 2 bytes output + 2 bytes input:
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* "process call" op.
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*/
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c.wdata.word = oword;
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if (ioctl(fd, SMB_PCALL, &c) == -1)
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return (-1);
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printf(fmt, (unsigned short)c.rdata.word);
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putchar('\n');
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return (0);
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} else if (iflag > 1 && oflag == -1) {
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/* command + > 1 bytes of input: block read */
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c.rbuf = ibuf;
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c.rcount = iflag;
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if (ioctl(fd, SMB_BREAD, &c) == -1)
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return (-1);
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for (i = 0; i < c.rcount; i++) {
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if (i != 0)
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putchar(' ');
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printf(fmt, ibuf[i]);
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}
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putchar('\n');
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return (0);
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} else if (iflag == -1 && oflag > 1) {
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/* command + > 1 bytes of output: block write */
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c.wbuf = obuf;
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c.wcount = oflag;
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return (ioctl(fd, SMB_BWRITE, &c));
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}
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return (-2);
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}
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int
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main(int argc, char **argv)
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{
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int i, n, errs = 0;
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int savederrno;
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while ((i = getopt(argc, argv, "F:c:f:i:o:ps:w")) != -1)
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switch (i) {
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case 'F':
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fmt = optarg;
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break;
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case 'c':
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if ((cflag = getnum(optarg)) == -1)
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errx(EX_USAGE, "Invalid number: %s", optarg);
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if (cflag < 0 || cflag >= 256)
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errx(EX_USAGE,
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"CMD out of range: %d",
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cflag);
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break;
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case 'f':
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dev = optarg;
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break;
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case 'i':
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if ((iflag = getnum(optarg)) == -1)
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errx(EX_USAGE, "Invalid number: %s", optarg);
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if (iflag < 0 || iflag > SMB_MAXBLOCKSIZE)
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errx(EX_USAGE,
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"# input bytes out of range: %d",
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iflag);
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break;
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case 'o':
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if ((oflag = getnum(optarg)) == -1)
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errx(EX_USAGE, "Invalid number: %s", optarg);
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if (oflag < 0 || oflag > SMB_MAXBLOCKSIZE)
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errx(EX_USAGE,
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"# output bytes out of range: %d",
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oflag);
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break;
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case 'p':
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pflag = 1;
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break;
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case 's':
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if ((slave = getnum(optarg)) == -1)
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errx(EX_USAGE, "Invalid number: %s", optarg);
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if (slave < MIN_I2C_ADDR || slave >= MAX_I2C_ADDR)
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errx(EX_USAGE,
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"Slave address out of range: %d",
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slave);
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break;
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case 'w':
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wflag = 1;
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break;
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default:
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errs++;
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}
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argc -= optind;
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argv += optind;
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if (errs || (slave != -1 && pflag) || (slave == -1 && !pflag))
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usage();
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if (wflag &&
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!((iflag == 2 && oflag == -1) ||
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(iflag == -1 && oflag == 2) ||
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(iflag == 2 && oflag == 2)))
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errx(EX_USAGE, "Illegal # IO bytes for word IO");
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if (!pflag && iflag == -1 && oflag == -1)
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errx(EX_USAGE, "Nothing to do");
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if (pflag && (cflag != -1 || iflag != -1 || oflag != -1 || wflag != 0))
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usage();
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if (oflag > 0) {
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if (oflag == 2 && wflag) {
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if (argc == 0)
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errx(EX_USAGE, "Too few arguments for -o count");
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if ((n = getnum(*argv)) == -1)
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errx(EX_USAGE, "Invalid number: %s", *argv);
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if (n < 0 || n >= 65535)
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errx(EX_USAGE, "Value out of range: %d", n);
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oword = n;
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argc--;
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argv++;
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} else for (i = 0; i < oflag; i++, argv++, argc--) {
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if (argc == 0)
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errx(EX_USAGE, "Too few arguments for -o count");
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if ((n = getnum(*argv)) == -1)
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errx(EX_USAGE, "Invalid number: %s", *argv);
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if (n < 0 || n >= 256)
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errx(EX_USAGE, "Value out of range: %d", n);
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obuf[i] = n;
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}
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}
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if (argc != 0)
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usage();
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if ((fd = open(dev, O_RDWR)) == -1)
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err(EX_UNAVAILABLE, "Cannot open %s", dev);
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i = 0;
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if (pflag)
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probe_i2c();
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else
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i = do_io();
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savederrno = errno;
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close(fd);
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errno = savederrno;
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if (i == -1)
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err(EX_UNAVAILABLE, "Error performing SMBus IO");
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else if (i == -2)
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errx(EX_USAGE, "Invalid option combination");
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return (0);
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}
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