The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
346 lines
8.5 KiB
C
346 lines
8.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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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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