Added a program to dump the registers of an SMBus device. Do not try

it yet; there are still bugs, which cause kernel oopses.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@163 7894878c-1315-0410-8ee3-d5d059ff63e0

prog/dump/Module.mk

@@ -22,8 +22,8 @@ MODULE_DIR := prog/dump
 
 # Regrettably, even 'simply expanded variables' will not put their currently
 # defined value verbatim into the command-list of rules...
-PROGDUMPTARGETS := $(MODULE_DIR)/isadump
-PROGDUMPSOURCES := $(MODULE_DIR)/isadump.c 
+PROGDUMPTARGETS := $(MODULE_DIR)/isadump $(MODULE_DIR)/i2cdump
+PROGDUMPSOURCES := $(MODULE_DIR)/isadump.c  $(MODULE_DIR)/i2cdump.c
 
 # Include all dependency files. We use '.rd' to indicate this will create
 # executables.

prog/dump/i2cdump.c

@@ -0,0 +1,133 @@
+/*
+    i2cdump.c - Part of i2cdump, a user-space program to dump I2C registers
+    Copyright (c) 1999  Frodo Looijaard <frodol@dds.nl>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include "src/i2c-dev.h"
+
+void help(void)
+{
+  fprintf(stderr,"Syntax: i2cdump I2CBUS ADDRESS MODE\n");
+  fprintf(stderr,"  MODE may be 'b' or 'w'\n");
+}
+
+int main(int argc, char *argv[])
+{
+  char *end;
+  int i,j,res,i2cbus,address,size,file;
+  char filename[20];
+  
+
+  if (argc < 2) {
+    fprintf(stderr,"Error: No i2c-bus specified!\n");
+    help();
+    exit(1);
+  }
+
+  i2cbus = strtol(argv[1],&end,0);
+  if (*end) {
+    fprintf(stderr,"Error: First argument not a number!\n");
+    help();
+    exit(1);
+  }
+  if ((i2cbus < 0) || (i2cbus > 0xff)) {
+    fprintf(stderr,"Error: I2CBUS argument out of range!\n");
+    help();
+  }
+
+  if (argc < 3) {
+    fprintf(stderr,"Error: No address specified!\n");
+    help();
+    exit(1);
+  }
+  address = strtol(argv[2],&end,0);
+  if (*end) {
+    fprintf(stderr,"Error: Second argument not a number!\n");
+    help();
+    exit(1);
+  }
+  if ((address < 0) || (address > 0x7f)) {
+    fprintf(stderr,"Error: Address out of range!\n");
+    help();
+  }
+
+  if (argc < 4) {
+    fprintf(stderr,"Warning: no size specified (using byte-data access)\n");
+    size = SMBUS_BYTE_DATA;
+  } else if (!strcmp(argv[3],"b"))
+    size = SMBUS_BYTE_DATA;
+  else if (!strcmp(argv[3],"w"))
+    size = SMBUS_WORD_DATA;
+  else {
+    fprintf(stderr,"Error: Third argument not recognized!\n");
+    help();
+    exit(1);
+  }
+
+  sprintf(filename,"/dev/i2c-%d",i2cbus);
+  if ((file = open(filename,O_RDWR)) < 0) {
+    fprintf(stderr,"Error: Could not open file `%s': %s\n",filename,
+            strerror(errno));
+    exit(1);
+  }
+  
+  if (ioctl(file,I2C_SLAVE,address) < 0) {
+    fprintf(stderr,"Error: Could not set address to %d: %s\n",address,
+            strerror(errno));
+    exit(1);
+  }
+ 
+  fprintf(stderr,"  WARNING! Running this program can confuse your I2C bus, "
+          "cause data loss and worse!\n");
+  fprintf(stderr,"  I will probe file %s, address %x, mode %s\n",
+          filename,address,size == SMBUS_BYTE_DATA?"byte":"word");
+  fprintf(stderr,"  You have five seconds to reconsider and press CTRL-C!\n\n");
+  sleep(5);
+
+  if (size == SMBUS_BYTE_DATA) {
+    printf("     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f\n");
+    for (i = 0; i < 256; i+=16) {
+      printf("%02x: ",i);
+      for(j = 0; j < 16; j++) {
+        res = i2c_smbus_read_byte_data(file,i+j);
+        if (res < 0)
+          printf("XX ");
+        else
+          printf("%02x ",res & 0xff);
+      }
+      printf("\n");
+    }
+  } else {
+    printf("     0,8  1,9  2,a  3,b  4,c  5,d  6,e  7,f\n");
+    for (i = 0; i < 256; i+=8) {
+      printf("%02x: ",i);
+      for(j = 0; j < 8; j++) {
+        res = i2c_smbus_read_byte_data(file,i+j);
+        if (res < 0)
+          printf("XXXX ");
+        else
+          printf("%04x ",res & 0xffff);
+      }
+      printf("\n");
+    }
+  }
+  exit(0);
+}