From: Thomas Cort Date: Mon, 15 Jul 2013 14:29:16 +0000 (-0400) Subject: Importing usr.sbin/i2cscan X-Git-Tag: v3.3.0~889 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=3c59273c97a8cdd3abaee6533c83da2d371abfff;p=minix.git Importing usr.sbin/i2cscan Change-Id: I7b776d6e5f3fe4f7a1af353b995ef9e2e752c7ea --- diff --git a/distrib/sets/lists/minix/mi b/distrib/sets/lists/minix/mi index e4a0ce613..fd849bda4 100644 --- a/distrib/sets/lists/minix/mi +++ b/distrib/sets/lists/minix/mi @@ -4241,6 +4241,7 @@ ./usr/man/man8/halt.8 minix-sys ./usr/man/man8/hgfs.8 minix-sys ./usr/man/man8/httpd.8 minix-sys +./usr/man/man8/i2cscan.8 minix-sys ./usr/man/man8/ifconfig.8 minix-sys ./usr/man/man8/inet.8 minix-sys ./usr/man/man8/in.httpd.8 minix-sys @@ -4315,6 +4316,7 @@ ./usr/sbin/groupdel minix-sys ./usr/sbin/groupinfo minix-sys ./usr/sbin/groupmod minix-sys +./usr/sbin/i2cscan minix-sys ./usr/sbin/inet minix-sys ./usr/sbin/init minix-sys ./usr/sbin/installboot_nbsd minix-sys diff --git a/releasetools/nbsd_ports b/releasetools/nbsd_ports index b2ee60e45..9fdc33558 100644 --- a/releasetools/nbsd_ports +++ b/releasetools/nbsd_ports @@ -183,6 +183,7 @@ 2012/10/17 12:00:00,usr.bin/xinstall 2013/03/15 12:00:00,usr.bin/yes 2012/02/10 16:16:12,usr.sbin/chroot +2013/07/10 15:18:55,usr.sbin/i2cscan 2011/11/03 20:46:41,usr.sbin/installboot 2012/10/17 12:00:00,usr.sbin/Makefile 2012/10/17 12:00:00,usr.sbin/Makefile.inc diff --git a/usr.sbin/Makefile b/usr.sbin/Makefile index ff33db3df..1e5fe653b 100644 --- a/usr.sbin/Makefile +++ b/usr.sbin/Makefile @@ -5,7 +5,7 @@ SUBDIR= \ chroot \ - installboot \ + i2cscan installboot \ mtree \ pwd_mkdb postinstall \ rdate user \ diff --git a/usr.sbin/i2cscan/Makefile b/usr.sbin/i2cscan/Makefile new file mode 100644 index 000000000..f03d9f92c --- /dev/null +++ b/usr.sbin/i2cscan/Makefile @@ -0,0 +1,6 @@ +# $NetBSD: Makefile,v 1.2 2011/10/06 12:38:58 wiz Exp $ + +PROG= i2cscan +MAN= i2cscan.8 + +.include diff --git a/usr.sbin/i2cscan/i2cscan.8 b/usr.sbin/i2cscan/i2cscan.8 new file mode 100644 index 000000000..c41bda5b0 --- /dev/null +++ b/usr.sbin/i2cscan/i2cscan.8 @@ -0,0 +1,66 @@ +.\" $NetBSD: i2cscan.8,v 1.3 2013/07/10 15:18:54 tcort Exp $ +.\" +.\" Copyright (c) 2011, 2013 The NetBSD Foundation, Inc. +.\" All rights reserved. +.\" +.\" This code is derived from software contributed to The NetBSD Foundation +.\" by Thomas Klausner. +.\" +.\" 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 THE NETBSD FOUNDATION, INC. 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 THE FOUNDATION 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. +.\" +.Dd July 10, 2013 +.Dt I2CSCAN 8 +.Os +.Sh NAME +.Nm i2cscan +.Nd scan an IIC bus for devices +.Sh SYNOPSIS +.Nm +.Op Fl r +.Ar i2cdev +.Sh DESCRIPTION +The +.Nm +utility scans the IIC bus +.Pq Xr iic 4 +specified by +.Ar i2cdev +to determine which addresses respond. +.Pp +Available options: +.Bl -tag -width Ds +.It Fl r +scan using 1 byte reads instead of quick writes. +.El +.Pp +.Em WARNING ! +Using this utility can access some devices in such a +manner as to leave them in an unstable or unusable state. +It can also lock up the entire +.Xr iic 4 +bus. +Don't use this utility unless you know what you're doing and can +accept all sorts of unforeseen consequences. +.Sh EXIT STATUS +.Ex -std i2cscan +.Sh SEE ALSO +.Xr iic 4 diff --git a/usr.sbin/i2cscan/i2cscan.c b/usr.sbin/i2cscan/i2cscan.c new file mode 100644 index 000000000..41d130adc --- /dev/null +++ b/usr.sbin/i2cscan/i2cscan.c @@ -0,0 +1,195 @@ +/* $NetBSD: i2cscan.c,v 1.4 2013/07/10 15:18:54 tcort Exp $ */ + +/*- + * Copyright (c) 2011, 2013 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Paul Goyette and Jared McNeill + * + * 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 THE NETBSD FOUNDATION, INC. 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 THE FOUNDATION 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. + */ + +#include +__RCSID("$NetBSD: i2cscan.c,v 1.4 2013/07/10 15:18:54 tcort Exp $"); + +#include +#include + +#include +#include +#include +#include +#include +#include + +#include + +#define MODE_DEFAULT 0 +#define MODE_READ 1 + +__dead static void +usage(void) +{ + fprintf(stderr, "usage: %s [-r] \n", getprogname()); + exit(EXIT_FAILURE); +} + +static int +iic_smbus_quick_write(int fd, i2c_addr_t addr, int flags) +{ + i2c_ioctl_exec_t iie; + + iie.iie_op = I2C_OP_WRITE_WITH_STOP; + iie.iie_addr = addr; + iie.iie_cmd = NULL; + iie.iie_cmdlen = 0; + iie.iie_buf = NULL; + iie.iie_buflen = 0; + + if (ioctl(fd, I2C_IOCTL_EXEC, &iie) == -1) + return errno; + return 0; +} + +static int +iic_smbus_receive_byte(int fd, i2c_addr_t addr, uint8_t *valp, int flags) +{ + i2c_ioctl_exec_t iie; + + iie.iie_op = I2C_OP_READ_WITH_STOP; + iie.iie_addr = addr; + iie.iie_cmd = NULL; + iie.iie_cmdlen = 0; + iie.iie_buf = valp; + iie.iie_buflen = 1; + + if (ioctl(fd, I2C_IOCTL_EXEC, &iie) == -1) + return errno; + return 0; + +} + +static void +do_i2c_scan(const char *dname, int fd, int mode) +{ + int error; + int found = 0; + i2c_addr_t addr; + uint8_t val; + + for (addr = 0x09; addr < 0x78; addr++) { + /* + * Skip certain i2c addresses: + * 0x00 General Call / START + * 0x01 CBUS Address + * 0x02 Different Bus format + * 0x03 - 0x07 Reserved + * 0x08 Host Address + * 0x0c Alert Response Address + * 0x28 ACCESS.Bus host + * 0x37 ACCESS.Bus default address + * 0x48 - 0x4b Prototypes + * 0x61 Device Default Address + * 0x78 - 0x7b 10-bit addresses + * 0x7c - 0x7f Reserved + * + * Some of these are skipped by judicious selection + * of the range of the above for (;;) statement. + * + * if (addr <= 0x08 || addr >= 0x78) + * continue; + */ + if (addr == 0x0c || addr == 0x28 || addr == 0x37 || + addr == 0x61 || (addr & 0x7c) == 0x48) + continue; + + /* + * Use SMBus quick_write command to detect most + * addresses; should avoid hanging the bus on + * some write-only devices (like clocks that show + * up at address 0x69) + * + * XXX The quick_write() is allegedly known to + * XXX corrupt the Atmel AT24RF08 EEPROM found + * XXX on some IBM Thinkpads! + */ + printf("\r%s: scanning 0x%02x", dname, addr); + fflush(stdout); + if ((addr & 0xf8) == 0x30 || + (addr & 0xf0) == 0x50 || + mode == MODE_READ) + error = iic_smbus_receive_byte(fd, addr, &val, 0); + else + error = iic_smbus_quick_write(fd, addr, 0); + if (error == 0) { + printf("\r%s: found device at 0x%02x\n", + dname, addr); + ++found; + } + } + if (found == 0) + printf("\r%s: no devices found\n", dname); + else + printf("\r%s: %d devices found\n", dname, found); +} + +int +main(int argc, char *argv[]) +{ + int fd; + int ch, rflag; + int mode; + + setprogname(*argv); + + rflag = 0; + + while ((ch = getopt(argc, argv, "r")) != -1) + switch (ch) { + case 'r': + rflag = 1; + break; + default: + break; + } + argv += optind; + argc -= optind; + + if (rflag) + mode = MODE_READ; + else + mode = MODE_DEFAULT; + + if (*argv == NULL) + usage(); + + fd = open(*argv, O_RDWR); + if (fd == -1) + err(EXIT_FAILURE, "couldn't open %s", *argv); + + do_i2c_scan(*argv, fd, mode); + + close(fd); + + return EXIT_SUCCESS; +}