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-rw-r--r--usr.sbin/smbmsg/smbmsg.c347
1 files changed, 347 insertions, 0 deletions
diff --git a/usr.sbin/smbmsg/smbmsg.c b/usr.sbin/smbmsg/smbmsg.c
new file mode 100644
index 0000000..4e7e609
--- /dev/null
+++ b/usr.sbin/smbmsg/smbmsg.c
@@ -0,0 +1,347 @@
+/*-
+ * Copyright (C) 2004 Joerg Wunsch
+ * All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Send or receive messages over an SMBus.
+ */
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+
+#include <dev/smbus/smb.h>
+
+#include "pathnames.h"
+
+static const char *dev = PATH_DEFAULTSMBDEV;
+static const char *bytefmt = "0x%02x";
+static const char *wordfmt = "0x%04x";
+static const char *fmt;
+
+static int fd; /* file descriptor for /dev/smbX */
+static int cflag = -1; /* SMBus cmd */
+static int iflag = -1; /* input data */
+static int oflag = -1; /* output data */
+static int pflag; /* probe bus */
+static int slave = -1; /* slave address */
+static int wflag; /* word IO */
+
+static unsigned char ibuf[SMB_MAXBLOCKSIZE];
+static unsigned char obuf[SMB_MAXBLOCKSIZE];
+static unsigned short oword, iword;
+
+/*
+ * The I2C specs say that all addresses below 16 and above or equal
+ * 240 are reserved. Address 0 is the global address, but we do not
+ * care for this detail.
+ */
+#define MIN_I2C_ADDR 16
+#define MAX_I2C_ADDR 240
+
+static int do_io(void);
+static int getnum(const char *s);
+static void probe_i2c(void);
+static void usage(void);
+
+static void
+usage(void)
+{
+ fprintf(stderr,
+ "usage: smbmsg [-f dev] -p\n"
+ " smbmsg [-f dev] -s slave [-F fmt] [-c cmd] [-w] "
+ "[-i incnt] [-o outcnt] [outdata ...]\n");
+ exit(EX_USAGE);
+}
+
+static int
+getnum(const char *s)
+{
+ char *endp;
+ unsigned long l;
+
+ l = strtoul(s, &endp, 0);
+ if (*s != '\0' && *endp == '\0')
+ return (int)l;
+ return (-1);
+}
+
+static void
+probe_i2c(void)
+{
+ unsigned char addr;
+ int flags;
+#define IS_READABLE 1
+#define IS_WRITEABLE 2
+ struct smbcmd c;
+
+ printf("Probing for devices on %s:\n", dev);
+
+ for (addr = MIN_I2C_ADDR; addr < MAX_I2C_ADDR; addr += 2) {
+ c.slave = addr;
+ flags = 0;
+ if (ioctl(fd, SMB_RECVB, &c) != -1)
+ flags = IS_READABLE;
+ if (ioctl(fd, SMB_QUICK_WRITE, &c) != -1)
+ flags |= IS_WRITEABLE;
+ if (flags != 0) {
+ printf("Device @0x%02x: ", addr);
+ if (flags & IS_READABLE)
+ putchar('r');
+ if (flags & IS_WRITEABLE)
+ putchar('w');
+ putchar('\n');
+ }
+ }
+}
+
+static int
+do_io(void)
+{
+ struct smbcmd c;
+ int i;
+
+ c.slave = slave;
+ c.cmd = cflag;
+
+ if (fmt == NULL && iflag > 0)
+ fmt = wflag? wordfmt: bytefmt;
+
+ if (cflag == -1) {
+ /* operations that do not require a command byte */
+ if (iflag == -1 && oflag == 0)
+ /* 0 bytes output: quick write operation */
+ return (ioctl(fd, SMB_QUICK_WRITE, &c));
+ else if (iflag == 0 && oflag == -1)
+ /* 0 bytes input: quick read operation */
+ return (ioctl(fd, SMB_QUICK_READ, &c));
+ else if (iflag == 1 && oflag == -1) {
+ /* no command, 1 byte input: receive byte op. */
+ if (ioctl(fd, SMB_RECVB, &c) == -1)
+ return (-1);
+ printf(fmt, (unsigned char)c.cmd);
+ putchar('\n');
+ return (0);
+ } else if (iflag == -1 && oflag == 1) {
+ /* no command, 1 byte output: send byte op. */
+ c.cmd = obuf[0];
+ return (ioctl(fd, SMB_SENDB, &c));
+ } else
+ return (-2);
+ }
+ if (iflag == 1 && oflag == -1) {
+ /* command + 1 byte input: read byte op. */
+ c.rbuf = ibuf;
+ c.rcount = iflag;
+ if (ioctl(fd, SMB_READB, &c) == -1)
+ return (-1);
+ printf(fmt, (int)(unsigned char)ibuf[0]);
+ putchar('\n');
+ return (0);
+ } else if (iflag == -1 && oflag == 1) {
+ /* command + 1 byte output: write byte op. */
+ c.wdata.byte = obuf[0];
+ return (ioctl(fd, SMB_WRITEB, &c));
+ } else if (wflag && iflag == 2 && oflag == -1) {
+ /* command + 2 bytes input: read word op. */
+ c.rbuf = (char*) &iword;
+ c.rcount = iflag;
+ if (ioctl(fd, SMB_READW, &c) == -1)
+ return (-1);
+ printf(fmt, (int)(unsigned short)iword);
+ putchar('\n');
+ return (0);
+ } else if (wflag && iflag == -1 && oflag == 2) {
+ /* command + 2 bytes output: write word op. */
+ c.wdata.word = oword;
+ return (ioctl(fd, SMB_WRITEW, &c));
+ } else if (wflag && iflag == 2 && oflag == 2) {
+ /*
+ * command + 2 bytes output + 2 bytes input:
+ * "process call" op.
+ */
+ c.wdata.word = oword;
+ c.rbuf = (char*) &iword;
+ c.rcount = iflag;
+ if (ioctl(fd, SMB_PCALL, &c) == -1)
+ return (-1);
+ printf(fmt, (int)(unsigned short)iword);
+ putchar('\n');
+ return (0);
+ } else if (iflag > 1 && oflag == -1) {
+ /* command + > 1 bytes of input: block read */
+ c.rbuf = ibuf;
+ c.rcount = iflag;
+ if (ioctl(fd, SMB_BREAD, &c) == -1)
+ return (-1);
+ for (i = 0; i < iflag; i++) {
+ if (i != 0)
+ putchar(' ');
+ printf(fmt, ibuf[i]);
+ }
+ putchar('\n');
+ return (0);
+ } else if (iflag == -1 && oflag > 1) {
+ /* command + > 1 bytes of output: block write */
+ c.wbuf = obuf;
+ c.wcount = oflag;
+ return (ioctl(fd, SMB_BWRITE, &c));
+ }
+
+ return (-2);
+}
+
+
+int
+main(int argc, char **argv)
+{
+ int i, n, errs = 0;
+ int savederrno;
+
+ while ((i = getopt(argc, argv, "F:c:f:i:o:ps:w")) != -1)
+ switch (i) {
+ case 'F':
+ fmt = optarg;
+ break;
+
+ case 'c':
+ if ((cflag = getnum(optarg)) == -1)
+ errx(EX_USAGE, "Invalid number: %s", optarg);
+ if (cflag < 0 || cflag >= 256)
+ errx(EX_USAGE,
+ "CMD out of range: %d",
+ cflag);
+ break;
+
+ case 'f':
+ dev = optarg;
+ break;
+
+ case 'i':
+ if ((iflag = getnum(optarg)) == -1)
+ errx(EX_USAGE, "Invalid number: %s", optarg);
+ if (iflag < 0 || iflag > SMB_MAXBLOCKSIZE)
+ errx(EX_USAGE,
+ "# input bytes out of range: %d",
+ iflag);
+ break;
+
+ case 'o':
+ if ((oflag = getnum(optarg)) == -1)
+ errx(EX_USAGE, "Invalid number: %s", optarg);
+ if (oflag < 0 || oflag > SMB_MAXBLOCKSIZE)
+ errx(EX_USAGE,
+ "# output bytes out of range: %d",
+ oflag);
+ break;
+
+ case 'p':
+ pflag = 1;
+ break;
+
+ case 's':
+ if ((slave = getnum(optarg)) == -1)
+ errx(EX_USAGE, "Invalid number: %s", optarg);
+
+ if (slave < MIN_I2C_ADDR || slave >= MAX_I2C_ADDR)
+ errx(EX_USAGE,
+ "Slave address out of range: %d",
+ slave);
+ break;
+
+ case 'w':
+ wflag = 1;
+ break;
+
+ default:
+ errs++;
+ }
+ argc -= optind;
+ argv += optind;
+ if (errs || (slave != -1 && pflag) || (slave == -1 && !pflag))
+ usage();
+ if (wflag &&
+ !((iflag == 2 && oflag == -1) ||
+ (iflag == -1 && oflag == 2) ||
+ (iflag == 2 && oflag == 2)))
+ errx(EX_USAGE, "Illegal # IO bytes for word IO");
+ if (!pflag && iflag == -1 && oflag == -1)
+ errx(EX_USAGE, "Nothing to do");
+ if (pflag && (cflag != -1 || iflag != -1 || oflag != -1 || wflag != 0))
+ usage();
+ if (oflag > 0) {
+ if (oflag == 2 && wflag) {
+ if (argc == 0)
+ errx(EX_USAGE, "Too few arguments for -o count");
+ if ((n = getnum(*argv)) == -1)
+ errx(EX_USAGE, "Invalid number: %s", *argv);
+ if (n < 0 || n >= 65535)
+ errx(EX_USAGE, "Value out of range: %d", n);
+ oword = n;
+ argc--;
+ argv++;
+ } else for (i = 0; i < oflag; i++, argv++, argc--) {
+ if (argc == 0)
+ errx(EX_USAGE, "Too few arguments for -o count");
+ if ((n = getnum(*argv)) == -1)
+ errx(EX_USAGE, "Invalid number: %s", *argv);
+ if (n < 0 || n >= 256)
+ errx(EX_USAGE, "Value out of range: %d", n);
+ obuf[i] = n;
+ }
+ }
+ if (argc != 0)
+ usage();
+
+ if ((fd = open(dev, O_RDWR)) == -1)
+ err(EX_UNAVAILABLE, "Cannot open %s", dev);
+
+ i = 0;
+ if (pflag)
+ probe_i2c();
+ else
+ i = do_io();
+
+ savederrno = errno;
+ close(fd);
+ errno = savederrno;
+
+ if (i == -1)
+ err(EX_UNAVAILABLE, "Error performing SMBus IO");
+ else if (i == -2)
+ errx(EX_USAGE, "Invalid option combination");
+
+ return (0);
+}
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