1/*-
2 * Copyright (C) 2004 Joerg Wunsch
3 * All Rights Reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/smbmsg/smbmsg.c 129353 2004-05-17 19:19:08Z joerg $
27 */
28
29/*
30 * Send or receive messages over an SMBus.
31 */
32
33#include <err.h>
34#include <errno.h>
35#include <fcntl.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <sysexits.h>
40#include <unistd.h>
41
42#include <sys/types.h>
43#include <sys/ioctl.h>
44
45#include <dev/smbus/smb.h>
46
47#include "pathnames.h"
48
49static const char *dev = PATH_DEFAULTSMBDEV;
50static const char *bytefmt = "0x%02x";
51static const char *wordfmt = "0x%04x";
52static const char *fmt;
53
54static int fd; /* file descriptor for /dev/smbX */
55static int cflag = -1; /* SMBus cmd */
56static int iflag = -1; /* input data */
57static int oflag = -1; /* output data */
58static int pflag; /* probe bus */
59static int slave = -1; /* slave address */
60static int wflag; /* word IO */
61
62static unsigned char ibuf[SMB_MAXBLOCKSIZE];
63static unsigned char obuf[SMB_MAXBLOCKSIZE];
64static unsigned short oword, iword;
65
66/*
67 * The I2C specs say that all addresses below 16 and above or equal
68 * 240 are reserved. Address 0 is the global address, but we do not
69 * care for this detail.
70 */
71#define MIN_I2C_ADDR 16
72#define MAX_I2C_ADDR 240
73
74static int do_io(void);
75static int getnum(const char *s);
76static void probe_i2c(void);
77static void usage(void);
78
79static void
80usage(void)
81{
82 fprintf(stderr,
83 "usage: smbmsg [-f dev] -p\n"
84 " smbmsg [-f dev] -s slave [-F fmt] [-c cmd] [-w] "
85 "[-i incnt] [-o outcnt] [outdata ...]\n");
86 exit(EX_USAGE);
87}
88
89static int
90getnum(const char *s)
91{
92 char *endp;
93 unsigned long l;
94
95 l = strtoul(s, &endp, 0);
96 if (*s != '\0' && *endp == '\0')
97 return (int)l;
98 return (-1);
99}
100
101static void
102probe_i2c(void)
103{
104 unsigned char addr;
105 int flags;
106#define IS_READABLE 1
107#define IS_WRITEABLE 2
108 struct smbcmd c;
109
110 printf("Probing for devices on %s:\n", dev);
111
112 for (addr = MIN_I2C_ADDR; addr < MAX_I2C_ADDR; addr += 2) {
113 c.slave = addr;
114 flags = 0;
115 if (ioctl(fd, SMB_RECVB, &c) != -1)
116 flags = IS_READABLE;
117 if (ioctl(fd, SMB_QUICK_WRITE, &c) != -1)
118 flags |= IS_WRITEABLE;
119 if (flags != 0) {
120 printf("Device @0x%02x: ", addr);
121 if (flags & IS_READABLE)
122 putchar('r');
123 if (flags & IS_WRITEABLE)
124 putchar('w');
125 putchar('\n');
126 }
127 }
128}
129
130static int
131do_io(void)
132{
133 struct smbcmd c;
134 int i;
135
136 c.slave = slave;
137 c.cmd = cflag;
138
139 if (fmt == NULL && iflag > 0)
140 fmt = wflag? wordfmt: bytefmt;
141
142 if (cflag == -1) {
143 /* operations that do not require a command byte */
144 if (iflag == -1 && oflag == 0)
145 /* 0 bytes output: quick write operation */
146 return (ioctl(fd, SMB_QUICK_WRITE, &c));
147 else if (iflag == 0 && oflag == -1)
148 /* 0 bytes input: quick read operation */
149 return (ioctl(fd, SMB_QUICK_READ, &c));
150 else if (iflag == 1 && oflag == -1) {
151 /* no command, 1 byte input: receive byte op. */
152 if (ioctl(fd, SMB_RECVB, &c) == -1)
153 return (-1);
154 printf(fmt, (unsigned char)c.cmd);
155 putchar('\n');
156 return (0);
157 } else if (iflag == -1 && oflag == 1) {
158 /* no command, 1 byte output: send byte op. */
159 c.cmd = obuf[0];
160 return (ioctl(fd, SMB_SENDB, &c));
161 } else
162 return (-2);
163 }
164 if (iflag == 1 && oflag == -1) {
165 /* command + 1 byte input: read byte op. */
166 c.data.byte_ptr = ibuf;
167 if (ioctl(fd, SMB_READB, &c) == -1)
168 return (-1);
169 printf(fmt, (int)(unsigned char)ibuf[0]);
170 putchar('\n');
171 return (0);
172 } else if (iflag == -1 && oflag == 1) {
173 /* command + 1 byte output: write byte op. */
174 c.data.byte = obuf[0];
175 return (ioctl(fd, SMB_WRITEB, &c));
176 } else if (wflag && iflag == 2 && oflag == -1) {
177 /* command + 2 bytes input: read word op. */
178 c.data.word_ptr = &iword;
179 if (ioctl(fd, SMB_READW, &c) == -1)
180 return (-1);
181 printf(fmt, (int)(unsigned short)iword);
182 putchar('\n');
183 return (0);
184 } else if (wflag && iflag == -1 && oflag == 2) {
185 /* command + 2 bytes output: write word op. */
186 c.data.word = oword;
187 return (ioctl(fd, SMB_WRITEW, &c));
188 } else if (wflag && iflag == 2 && oflag == 2) {
189 /*
190 * command + 2 bytes output + 2 bytes input:
191 * "process call" op.
192 */
193 c.data.process.sdata = oword;
194 c.data.process.rdata = &iword;
195 if (ioctl(fd, SMB_PCALL, &c) == -1)
196 return (-1);
197 printf(fmt, (int)(unsigned short)iword);
198 putchar('\n');
199 return (0);
200 } else if (iflag > 1 && oflag == -1) {
201 /* command + > 1 bytes of input: block read */
202 c.data.byte_ptr = ibuf;
203 c.count = iflag;
204 if (ioctl(fd, SMB_BREAD, &c) == -1)
205 return (-1);
206 for (i = 0; i < iflag; i++) {
207 if (i != 0)
208 putchar(' ');
209 printf(fmt, ibuf[i]);
210 }
211 putchar('\n');
212 return (0);
213 } else if (iflag == -1 && oflag > 1) {
214 /* command + > 1 bytes of output: block write */
215 c.data.byte_ptr = obuf;
216 c.count = oflag;
217 return (ioctl(fd, SMB_BWRITE, &c));
218 }
219
220 return (-2);
221}
222
223
224int
225main(int argc, char **argv)
226{
227 int i, n, errs = 0;
228 int savederrno;
229
230 while ((i = getopt(argc, argv, "F:c:f:i:o:ps:w")) != -1)
231 switch (i) {
232 case 'F':
233 fmt = optarg;
234 break;
235
236 case 'c':
237 if ((cflag = getnum(optarg)) == -1)
238 errx(EX_USAGE, "Invalid number: %s", optarg);
239 if (cflag < 0 || cflag >= 256)
240 errx(EX_USAGE,
241 "CMD out of range: %d",
242 cflag);
243 break;
244
245 case 'f':
246 dev = optarg;
247 break;
248
249 case 'i':
250 if ((iflag = getnum(optarg)) == -1)
251 errx(EX_USAGE, "Invalid number: %s", optarg);
252 if (iflag < 0 || iflag >= SMB_MAXBLOCKSIZE)
253 errx(EX_USAGE,
254 "# input bytes out of range: %d",
255 iflag);
256 break;
257
258 case 'o':
259 if ((oflag = getnum(optarg)) == -1)
260 errx(EX_USAGE, "Invalid number: %s", optarg);
261 if (oflag < 0 || oflag >= SMB_MAXBLOCKSIZE)
262 errx(EX_USAGE,
263 "# output bytes out of range: %d",
264 oflag);
265 break;
266
267 case 'p':
268 pflag = 1;
269 break;
270
271 case 's':
272 if ((slave = getnum(optarg)) == -1)
273 errx(EX_USAGE, "Invalid number: %s", optarg);
274
275 if (slave < MIN_I2C_ADDR || slave >= MAX_I2C_ADDR)
276 errx(EX_USAGE,
277 "Slave address out of range: %d",
278 slave);
279 break;
280
281 case 'w':
282 wflag = 1;
283 break;
284
285 default:
286 errs++;
287 }
288 argc -= optind;
289 argv += optind;
290 if (errs || (slave != -1 && pflag) || (slave == -1 && !pflag))
291 usage();
292 if (wflag &&
293 !((iflag == 2 && oflag == -1) ||
294 (iflag == -1 && oflag == 2) ||
295 (iflag == 2 && oflag == 2)))
296 errx(EX_USAGE, "Illegal # IO bytes for word IO");
297 if (!pflag && iflag == -1 && oflag == -1)
298 errx(EX_USAGE, "Nothing to do");
299 if (pflag && (cflag != -1 || iflag != -1 || oflag != -1 || wflag != 0))
300 usage();
301 if (oflag > 0) {
302 if (oflag == 2 && wflag) {
303 if (argc == 0)
304 errx(EX_USAGE, "Too few arguments for -o count");
305 if ((n = getnum(*argv)) == -1)
306 errx(EX_USAGE, "Invalid number: %s", *argv);
307 if (n < 0 || n >= 65535)
308 errx(EX_USAGE, "Value out of range: %d", n);
309 oword = n;
310 argc--;
311 argv++;
312 } else for (i = 0; i < oflag; i++, argv++, argc--) {
313 if (argc == 0)
314 errx(EX_USAGE, "Too few arguments for -o count");
315 if ((n = getnum(*argv)) == -1)
316 errx(EX_USAGE, "Invalid number: %s", *argv);
317 if (n < 0 || n >= 256)
318 errx(EX_USAGE, "Value out of range: %d", n);
319 obuf[i] = n;
320 }
321 }
322 if (argc != 0)
323 usage();
324
325 if ((fd = open(dev, O_RDWR)) == -1)
326 err(EX_UNAVAILABLE, "Cannot open %s", dev);
327
328 i = 0;
329 if (pflag)
330 probe_i2c();
331 else
332 i = do_io();
333
334 savederrno = errno;
335 close(fd);
336 errno = savederrno;
337
338 if (i == -1)
339 err(EX_UNAVAILABLE, "Error performing SMBus IO");
340 else if (i == -2)
341 errx(EX_USAGE, "Invalid option combination");
342
343 return (0);
344}
2 * Copyright (C) 2004 Joerg Wunsch
3 * All Rights Reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/smbmsg/smbmsg.c 129353 2004-05-17 19:19:08Z joerg $
27 */
28
29/*
30 * Send or receive messages over an SMBus.
31 */
32
33#include <err.h>
34#include <errno.h>
35#include <fcntl.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <sysexits.h>
40#include <unistd.h>
41
42#include <sys/types.h>
43#include <sys/ioctl.h>
44
45#include <dev/smbus/smb.h>
46
47#include "pathnames.h"
48
49static const char *dev = PATH_DEFAULTSMBDEV;
50static const char *bytefmt = "0x%02x";
51static const char *wordfmt = "0x%04x";
52static const char *fmt;
53
54static int fd; /* file descriptor for /dev/smbX */
55static int cflag = -1; /* SMBus cmd */
56static int iflag = -1; /* input data */
57static int oflag = -1; /* output data */
58static int pflag; /* probe bus */
59static int slave = -1; /* slave address */
60static int wflag; /* word IO */
61
62static unsigned char ibuf[SMB_MAXBLOCKSIZE];
63static unsigned char obuf[SMB_MAXBLOCKSIZE];
64static unsigned short oword, iword;
65
66/*
67 * The I2C specs say that all addresses below 16 and above or equal
68 * 240 are reserved. Address 0 is the global address, but we do not
69 * care for this detail.
70 */
71#define MIN_I2C_ADDR 16
72#define MAX_I2C_ADDR 240
73
74static int do_io(void);
75static int getnum(const char *s);
76static void probe_i2c(void);
77static void usage(void);
78
79static void
80usage(void)
81{
82 fprintf(stderr,
83 "usage: smbmsg [-f dev] -p\n"
84 " smbmsg [-f dev] -s slave [-F fmt] [-c cmd] [-w] "
85 "[-i incnt] [-o outcnt] [outdata ...]\n");
86 exit(EX_USAGE);
87}
88
89static int
90getnum(const char *s)
91{
92 char *endp;
93 unsigned long l;
94
95 l = strtoul(s, &endp, 0);
96 if (*s != '\0' && *endp == '\0')
97 return (int)l;
98 return (-1);
99}
100
101static void
102probe_i2c(void)
103{
104 unsigned char addr;
105 int flags;
106#define IS_READABLE 1
107#define IS_WRITEABLE 2
108 struct smbcmd c;
109
110 printf("Probing for devices on %s:\n", dev);
111
112 for (addr = MIN_I2C_ADDR; addr < MAX_I2C_ADDR; addr += 2) {
113 c.slave = addr;
114 flags = 0;
115 if (ioctl(fd, SMB_RECVB, &c) != -1)
116 flags = IS_READABLE;
117 if (ioctl(fd, SMB_QUICK_WRITE, &c) != -1)
118 flags |= IS_WRITEABLE;
119 if (flags != 0) {
120 printf("Device @0x%02x: ", addr);
121 if (flags & IS_READABLE)
122 putchar('r');
123 if (flags & IS_WRITEABLE)
124 putchar('w');
125 putchar('\n');
126 }
127 }
128}
129
130static int
131do_io(void)
132{
133 struct smbcmd c;
134 int i;
135
136 c.slave = slave;
137 c.cmd = cflag;
138
139 if (fmt == NULL && iflag > 0)
140 fmt = wflag? wordfmt: bytefmt;
141
142 if (cflag == -1) {
143 /* operations that do not require a command byte */
144 if (iflag == -1 && oflag == 0)
145 /* 0 bytes output: quick write operation */
146 return (ioctl(fd, SMB_QUICK_WRITE, &c));
147 else if (iflag == 0 && oflag == -1)
148 /* 0 bytes input: quick read operation */
149 return (ioctl(fd, SMB_QUICK_READ, &c));
150 else if (iflag == 1 && oflag == -1) {
151 /* no command, 1 byte input: receive byte op. */
152 if (ioctl(fd, SMB_RECVB, &c) == -1)
153 return (-1);
154 printf(fmt, (unsigned char)c.cmd);
155 putchar('\n');
156 return (0);
157 } else if (iflag == -1 && oflag == 1) {
158 /* no command, 1 byte output: send byte op. */
159 c.cmd = obuf[0];
160 return (ioctl(fd, SMB_SENDB, &c));
161 } else
162 return (-2);
163 }
164 if (iflag == 1 && oflag == -1) {
165 /* command + 1 byte input: read byte op. */
166 c.data.byte_ptr = ibuf;
167 if (ioctl(fd, SMB_READB, &c) == -1)
168 return (-1);
169 printf(fmt, (int)(unsigned char)ibuf[0]);
170 putchar('\n');
171 return (0);
172 } else if (iflag == -1 && oflag == 1) {
173 /* command + 1 byte output: write byte op. */
174 c.data.byte = obuf[0];
175 return (ioctl(fd, SMB_WRITEB, &c));
176 } else if (wflag && iflag == 2 && oflag == -1) {
177 /* command + 2 bytes input: read word op. */
178 c.data.word_ptr = &iword;
179 if (ioctl(fd, SMB_READW, &c) == -1)
180 return (-1);
181 printf(fmt, (int)(unsigned short)iword);
182 putchar('\n');
183 return (0);
184 } else if (wflag && iflag == -1 && oflag == 2) {
185 /* command + 2 bytes output: write word op. */
186 c.data.word = oword;
187 return (ioctl(fd, SMB_WRITEW, &c));
188 } else if (wflag && iflag == 2 && oflag == 2) {
189 /*
190 * command + 2 bytes output + 2 bytes input:
191 * "process call" op.
192 */
193 c.data.process.sdata = oword;
194 c.data.process.rdata = &iword;
195 if (ioctl(fd, SMB_PCALL, &c) == -1)
196 return (-1);
197 printf(fmt, (int)(unsigned short)iword);
198 putchar('\n');
199 return (0);
200 } else if (iflag > 1 && oflag == -1) {
201 /* command + > 1 bytes of input: block read */
202 c.data.byte_ptr = ibuf;
203 c.count = iflag;
204 if (ioctl(fd, SMB_BREAD, &c) == -1)
205 return (-1);
206 for (i = 0; i < iflag; i++) {
207 if (i != 0)
208 putchar(' ');
209 printf(fmt, ibuf[i]);
210 }
211 putchar('\n');
212 return (0);
213 } else if (iflag == -1 && oflag > 1) {
214 /* command + > 1 bytes of output: block write */
215 c.data.byte_ptr = obuf;
216 c.count = oflag;
217 return (ioctl(fd, SMB_BWRITE, &c));
218 }
219
220 return (-2);
221}
222
223
224int
225main(int argc, char **argv)
226{
227 int i, n, errs = 0;
228 int savederrno;
229
230 while ((i = getopt(argc, argv, "F:c:f:i:o:ps:w")) != -1)
231 switch (i) {
232 case 'F':
233 fmt = optarg;
234 break;
235
236 case 'c':
237 if ((cflag = getnum(optarg)) == -1)
238 errx(EX_USAGE, "Invalid number: %s", optarg);
239 if (cflag < 0 || cflag >= 256)
240 errx(EX_USAGE,
241 "CMD out of range: %d",
242 cflag);
243 break;
244
245 case 'f':
246 dev = optarg;
247 break;
248
249 case 'i':
250 if ((iflag = getnum(optarg)) == -1)
251 errx(EX_USAGE, "Invalid number: %s", optarg);
252 if (iflag < 0 || iflag >= SMB_MAXBLOCKSIZE)
253 errx(EX_USAGE,
254 "# input bytes out of range: %d",
255 iflag);
256 break;
257
258 case 'o':
259 if ((oflag = getnum(optarg)) == -1)
260 errx(EX_USAGE, "Invalid number: %s", optarg);
261 if (oflag < 0 || oflag >= SMB_MAXBLOCKSIZE)
262 errx(EX_USAGE,
263 "# output bytes out of range: %d",
264 oflag);
265 break;
266
267 case 'p':
268 pflag = 1;
269 break;
270
271 case 's':
272 if ((slave = getnum(optarg)) == -1)
273 errx(EX_USAGE, "Invalid number: %s", optarg);
274
275 if (slave < MIN_I2C_ADDR || slave >= MAX_I2C_ADDR)
276 errx(EX_USAGE,
277 "Slave address out of range: %d",
278 slave);
279 break;
280
281 case 'w':
282 wflag = 1;
283 break;
284
285 default:
286 errs++;
287 }
288 argc -= optind;
289 argv += optind;
290 if (errs || (slave != -1 && pflag) || (slave == -1 && !pflag))
291 usage();
292 if (wflag &&
293 !((iflag == 2 && oflag == -1) ||
294 (iflag == -1 && oflag == 2) ||
295 (iflag == 2 && oflag == 2)))
296 errx(EX_USAGE, "Illegal # IO bytes for word IO");
297 if (!pflag && iflag == -1 && oflag == -1)
298 errx(EX_USAGE, "Nothing to do");
299 if (pflag && (cflag != -1 || iflag != -1 || oflag != -1 || wflag != 0))
300 usage();
301 if (oflag > 0) {
302 if (oflag == 2 && wflag) {
303 if (argc == 0)
304 errx(EX_USAGE, "Too few arguments for -o count");
305 if ((n = getnum(*argv)) == -1)
306 errx(EX_USAGE, "Invalid number: %s", *argv);
307 if (n < 0 || n >= 65535)
308 errx(EX_USAGE, "Value out of range: %d", n);
309 oword = n;
310 argc--;
311 argv++;
312 } else for (i = 0; i < oflag; i++, argv++, argc--) {
313 if (argc == 0)
314 errx(EX_USAGE, "Too few arguments for -o count");
315 if ((n = getnum(*argv)) == -1)
316 errx(EX_USAGE, "Invalid number: %s", *argv);
317 if (n < 0 || n >= 256)
318 errx(EX_USAGE, "Value out of range: %d", n);
319 obuf[i] = n;
320 }
321 }
322 if (argc != 0)
323 usage();
324
325 if ((fd = open(dev, O_RDWR)) == -1)
326 err(EX_UNAVAILABLE, "Cannot open %s", dev);
327
328 i = 0;
329 if (pflag)
330 probe_i2c();
331 else
332 i = do_io();
333
334 savederrno = errno;
335 close(fd);
336 errno = savederrno;
337
338 if (i == -1)
339 err(EX_UNAVAILABLE, "Error performing SMBus IO");
340 else if (i == -2)
341 errx(EX_USAGE, "Invalid option combination");
342
343 return (0);
344}