import
This commit is contained in:
parent
05a736de5b
commit
af0209486d
8 changed files with 944 additions and 0 deletions
189
24cXX.c
Normal file
189
24cXX.c
Normal file
|
@ -0,0 +1,189 @@
|
|||
/***************************************************************************
|
||||
copyright : (C) by 2003-2004 Stefano Barbato
|
||||
email : stefano@codesink.org
|
||||
|
||||
$Id: 24cXX.c,v 1.5 2004/02/29 11:05:28 tat Exp $
|
||||
***************************************************************************/
|
||||
|
||||
/***************************************************************************
|
||||
* *
|
||||
* 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. *
|
||||
* *
|
||||
***************************************************************************/
|
||||
#include <stdio.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <linux/fs.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <errno.h>
|
||||
#include <assert.h>
|
||||
#include <string.h>
|
||||
#include "24cXX.h"
|
||||
|
||||
static int i2c_write_1b(struct eeprom *e, __u8 buf)
|
||||
{
|
||||
int r;
|
||||
// we must simulate a plain I2C byte write with SMBus functions
|
||||
r = i2c_smbus_write_byte(e->fd, buf);
|
||||
if(r < 0)
|
||||
fprintf(stderr, "Error i2c_write_1b: %s\n", strerror(errno));
|
||||
usleep(10);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int i2c_write_2b(struct eeprom *e, __u8 buf[2])
|
||||
{
|
||||
int r;
|
||||
// we must simulate a plain I2C byte write with SMBus functions
|
||||
r = i2c_smbus_write_byte_data(e->fd, buf[0], buf[1]);
|
||||
if(r < 0)
|
||||
fprintf(stderr, "Error i2c_write_2b: %s\n", strerror(errno));
|
||||
usleep(10);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int i2c_write_3b(struct eeprom *e, __u8 buf[3])
|
||||
{
|
||||
int r;
|
||||
// we must simulate a plain I2C byte write with SMBus functions
|
||||
// the __u16 data field will be byte swapped by the SMBus protocol
|
||||
r = i2c_smbus_write_word_data(e->fd, buf[0], buf[2] << 8 | buf[1]);
|
||||
if(r < 0)
|
||||
fprintf(stderr, "Error i2c_write_3b: %s\n", strerror(errno));
|
||||
usleep(10);
|
||||
return r;
|
||||
}
|
||||
|
||||
|
||||
#define CHECK_I2C_FUNC( var, label ) \
|
||||
do { if(0 == (var & label)) { \
|
||||
fprintf(stderr, "\nError: " \
|
||||
#label " function is required. Program halted.\n\n"); \
|
||||
exit(1); } \
|
||||
} while(0);
|
||||
|
||||
int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom* e)
|
||||
{
|
||||
int funcs, fd, r;
|
||||
e->fd = e->addr = 0;
|
||||
e->dev = 0;
|
||||
|
||||
fd = open(dev_fqn, O_RDWR);
|
||||
if(fd <= 0)
|
||||
{
|
||||
fprintf(stderr, "Error eeprom_open: %s\n", strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
// get funcs list
|
||||
if((r = ioctl(fd, I2C_FUNCS, &funcs) < 0))
|
||||
{
|
||||
fprintf(stderr, "Error eeprom_open: %s\n", strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
// check for req funcs
|
||||
CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_BYTE );
|
||||
CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_BYTE );
|
||||
CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_BYTE_DATA );
|
||||
CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_BYTE_DATA );
|
||||
CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_READ_WORD_DATA );
|
||||
CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_WORD_DATA );
|
||||
|
||||
// set working device
|
||||
if( ( r = ioctl(fd, I2C_SLAVE, addr)) < 0)
|
||||
{
|
||||
fprintf(stderr, "Error eeprom_open: %s\n", strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
e->fd = fd;
|
||||
e->addr = addr;
|
||||
e->dev = dev_fqn;
|
||||
e->type = type;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int eeprom_close(struct eeprom *e)
|
||||
{
|
||||
close(e->fd);
|
||||
e->fd = -1;
|
||||
e->dev = 0;
|
||||
e->type = EEPROM_TYPE_UNKNOWN;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if 0
|
||||
int eeprom_24c32_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data)
|
||||
{
|
||||
__u8 buf[3] = { (mem_addr >> 8) & 0x00ff, mem_addr & 0x00ff, data };
|
||||
return i2c_write_3b(e, buf);
|
||||
}
|
||||
|
||||
|
||||
int eeprom_24c32_read_current_byte(struct eeprom* e)
|
||||
{
|
||||
ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
|
||||
return i2c_smbus_read_byte(e->fd);
|
||||
}
|
||||
|
||||
int eeprom_24c32_read_byte(struct eeprom* e, __u16 mem_addr)
|
||||
{
|
||||
int r;
|
||||
ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
|
||||
__u8 buf[2] = { (mem_addr >> 8) & 0x0ff, mem_addr & 0x0ff };
|
||||
r = i2c_write_2b(e, buf);
|
||||
if (r < 0)
|
||||
return r;
|
||||
r = i2c_smbus_read_byte(e->fd);
|
||||
return r;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
int eeprom_read_current_byte(struct eeprom* e)
|
||||
{
|
||||
ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
|
||||
return i2c_smbus_read_byte(e->fd);
|
||||
}
|
||||
|
||||
int eeprom_read_byte(struct eeprom* e, __u16 mem_addr)
|
||||
{
|
||||
int r;
|
||||
ioctl(e->fd, BLKFLSBUF); // clear kernel read buffer
|
||||
if(e->type == EEPROM_TYPE_8BIT_ADDR)
|
||||
{
|
||||
__u8 buf = mem_addr & 0x0ff;
|
||||
r = i2c_write_1b(e, buf);
|
||||
} else if(e->type == EEPROM_TYPE_16BIT_ADDR) {
|
||||
__u8 buf[2] = { (mem_addr >> 8) & 0x0ff, mem_addr & 0x0ff };
|
||||
r = i2c_write_2b(e, buf);
|
||||
} else {
|
||||
fprintf(stderr, "ERR: unknown eeprom type\n");
|
||||
return -1;
|
||||
}
|
||||
if (r < 0)
|
||||
return r;
|
||||
r = i2c_smbus_read_byte(e->fd);
|
||||
return r;
|
||||
}
|
||||
|
||||
int eeprom_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data)
|
||||
{
|
||||
if(e->type == EEPROM_TYPE_8BIT_ADDR) {
|
||||
__u8 buf[2] = { mem_addr & 0x00ff, data };
|
||||
return i2c_write_2b(e, buf);
|
||||
} else if(e->type == EEPROM_TYPE_16BIT_ADDR) {
|
||||
__u8 buf[3] =
|
||||
{ (mem_addr >> 8) & 0x00ff, mem_addr & 0x00ff, data };
|
||||
return i2c_write_3b(e, buf);
|
||||
}
|
||||
fprintf(stderr, "ERR: unknown eeprom type\n");
|
||||
return -1;
|
||||
}
|
||||
|
58
24cXX.h
Normal file
58
24cXX.h
Normal file
|
@ -0,0 +1,58 @@
|
|||
/***************************************************************************
|
||||
copyright : (C) by 2003-2004 Stefano Barbato
|
||||
email : stefano@codesink.org
|
||||
|
||||
$Id: 24cXX.h,v 1.6 2004/02/29 11:05:28 tat Exp $
|
||||
***************************************************************************/
|
||||
|
||||
/***************************************************************************
|
||||
* *
|
||||
* 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. *
|
||||
* *
|
||||
***************************************************************************/
|
||||
#ifndef _24CXX_H_
|
||||
#define _24CXX_H_
|
||||
#include "i2c-dev.h"
|
||||
|
||||
#define EEPROM_TYPE_UNKNOWN 0
|
||||
#define EEPROM_TYPE_8BIT_ADDR 1
|
||||
#define EEPROM_TYPE_16BIT_ADDR 2
|
||||
|
||||
struct eeprom
|
||||
{
|
||||
char *dev; // device file i.e. /dev/i2c-N
|
||||
int addr; // i2c address
|
||||
int fd; // file descriptor
|
||||
int type; // eeprom type
|
||||
};
|
||||
|
||||
/*
|
||||
* opens the eeprom device at [dev_fqn] (i.e. /dev/i2c-N) whose address is
|
||||
* [addr] and set the eeprom_24c32 [e]
|
||||
*/
|
||||
int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom*);
|
||||
/*
|
||||
* closees the eeprom device [e]
|
||||
*/
|
||||
int eeprom_close(struct eeprom *e);
|
||||
/*
|
||||
* read and returns the eeprom byte at memory address [mem_addr]
|
||||
* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
|
||||
*/
|
||||
int eeprom_read_byte(struct eeprom* e, __u16 mem_addr);
|
||||
/*
|
||||
* read the current byte
|
||||
* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
|
||||
*/
|
||||
int eeprom_read_current_byte(struct eeprom *e);
|
||||
/*
|
||||
* writes [data] at memory address [mem_addr]
|
||||
* Note: eeprom must have been selected by ioctl(fd,I2C_SLAVE,address)
|
||||
*/
|
||||
int eeprom_write_byte(struct eeprom *e, __u16 mem_addr, __u8 data);
|
||||
|
||||
#endif
|
||||
|
21
ChangeLog
Normal file
21
ChangeLog
Normal file
|
@ -0,0 +1,21 @@
|
|||
29.02.2004, 0.7.6
|
||||
- better error handling
|
||||
- read_from_eeprom bug fixed, thanks to Marek Michalkiewicz
|
||||
02.12.2003, 0.7.5
|
||||
- help switch (-h) added
|
||||
- 8bit addressing is now the default (safest)
|
||||
- 16bit mode switch added (-16)
|
||||
- quiet mode has been added (-q)
|
||||
28.11.2003, 0.7.4
|
||||
- force switch added (-f)
|
||||
- big warning will be displayed before reading/writing, user must
|
||||
confirm
|
||||
- i2c-dev.h has been (re)included into the distribution package because
|
||||
user space functions have been removed from the original i2c-dev.h
|
||||
by the dev team.
|
||||
21.11.2003, 0.7.3
|
||||
- ChangeLog added
|
||||
- WARNING file added
|
||||
- support for 8bit addressing EEPROMs (-8 command line switch)
|
||||
- better code documentation
|
||||
- i2c-dev.h is no more included into the dist package.
|
11
Makefile
Normal file
11
Makefile
Normal file
|
@ -0,0 +1,11 @@
|
|||
CFLAGS=-g -I. -Wall -O2
|
||||
|
||||
all: eeprog
|
||||
|
||||
clean:
|
||||
rm -f eeprog 24cXX.o
|
||||
|
||||
eeprog: eeprog.o 24cXX.o
|
||||
|
||||
eeprog-static: eeprog.o 24cXX.o
|
||||
$(CC) -static -o $@ $?
|
12
README
Normal file
12
README
Normal file
|
@ -0,0 +1,12 @@
|
|||
Important! See the WARNING file.
|
||||
|
||||
eeprog reads and writes 24Cxx EEPROMs connected to I2C serial bus.
|
||||
|
||||
It uses the SMBus protocol used by most of the recent chipsets. Don't forget to load
|
||||
your i2c chipset and the i2c-dev drivers.
|
||||
|
||||
Use -8 switch for EEPROM smaller then 24C16 (8bit addressing mode).
|
||||
|
||||
Again, it's really important that you read the WARNING file.
|
||||
|
||||
Type "make" to compile.
|
20
WARNING
Normal file
20
WARNING
Normal file
|
@ -0,0 +1,20 @@
|
|||
Writing on unknown EEPROMs can brake your computer.
|
||||
|
||||
DIMMs contain an EEPROM and if you overwrite it somehow your computer
|
||||
will not boot anymore.
|
||||
|
||||
Reading using 16bit addressing (i.e. not using the -8 switch) on a 8bit EEPROM
|
||||
can actually WRITE to the EEPROM. Be careful.
|
||||
|
||||
The following chips use 8bit mode:
|
||||
24C01
|
||||
24C02
|
||||
24C04
|
||||
24C08
|
||||
24C16
|
||||
|
||||
Bigger ones use 16bit addressing so you must not use -8.
|
||||
|
||||
More could need it, check data sheets.
|
||||
|
||||
If you are not sure about what you're doing DON'T use this tool.
|
272
eeprog.c
Normal file
272
eeprog.c
Normal file
|
@ -0,0 +1,272 @@
|
|||
/***************************************************************************
|
||||
copyright : (C) by 2003-2004 Stefano Barbato
|
||||
email : stefano@codesink.org
|
||||
|
||||
$Id: eeprog.c,v 1.28 2004/02/29 11:06:41 tat Exp $
|
||||
***************************************************************************/
|
||||
|
||||
/***************************************************************************
|
||||
* *
|
||||
* 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. *
|
||||
* *
|
||||
***************************************************************************/
|
||||
#include <stdio.h>
|
||||
#include <fcntl.h>
|
||||
#include <getopt.h>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <errno.h>
|
||||
#include <string.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include "24cXX.h"
|
||||
|
||||
#define VERSION "0.7.6"
|
||||
|
||||
#define ENV_DEV "EEPROG_DEV"
|
||||
#define ENV_I2C_ADDR "EEPROG_I2C_ADDR"
|
||||
|
||||
int g_quiet;
|
||||
|
||||
#define usage_if(a) do { do_usage_if( a , __LINE__); } while(0);
|
||||
void do_usage_if(int b, int line)
|
||||
{
|
||||
const static char *eeprog_usage =
|
||||
"eeprog " VERSION ", a 24Cxx EEPROM reader/writer\n"
|
||||
"Copyright (c) 2003-2004 by Stefano Barbato - All rights reserved.\n"
|
||||
"Usage: eeprog [-fqxdh] [-16|-8] [ -r addr[:count] | -w addr ] /dev/i2c-N i2c-address\n"
|
||||
"\n"
|
||||
" Address modes: \n"
|
||||
" -8 Use 8bit address mode for 24c0x...24C16 [default]\n"
|
||||
" -16 Use 16bit address mode for 24c32...24C256\n"
|
||||
" Actions: \n"
|
||||
" -r addr[:count] Read [count] (1 if omitted) bytes from [addr]\n"
|
||||
" and print them to the standard output\n"
|
||||
" -w addr Write input (stdin) at address [addr] of the EEPROM\n"
|
||||
" -h Print this help\n"
|
||||
" Options: \n"
|
||||
" -x Set hex output mode\n"
|
||||
" -d Dummy mode, display what *would* have been done\n"
|
||||
" -f Disable warnings and don't ask confirmation\n"
|
||||
" -q Quiet mode\n"
|
||||
"\n"
|
||||
"The following environment variables could be set instead of the command\n"
|
||||
"line arguments:\n"
|
||||
" EEPROG_DEV device name(/dev/i2c-N)\n"
|
||||
" EEPROG_I2C_ADDR i2c-address\n"
|
||||
"\n"
|
||||
" Examples\n"
|
||||
" 1- read 64 bytes from the EEPROM at address 0x54 on bus 0 starting\n"
|
||||
" at address 123 (decimal)\n"
|
||||
" eeprog /dev/i2c-0 0x54 -r 123:64\n"
|
||||
" 2- prints the hex codes of the first 32 bytes read from bus 1 \n"
|
||||
" at address 0x22\n"
|
||||
" eeprog /dev/i2c-1 0x51 -x -r 0x22:0x20\n"
|
||||
" 3- write the current timestamp at address 0x200 of the EEPROM on \n"
|
||||
" bus 0 at address 0x33 \n"
|
||||
" date | eeprog /dev/i2c-0 0x33 -w 0x200\n";
|
||||
|
||||
if(!b)
|
||||
return;
|
||||
fprintf(stderr, "%s\n[line %d]\n", eeprog_usage, line);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
|
||||
#define die_if(a, msg) do { do_die_if( a , msg, __LINE__); } while(0);
|
||||
void do_die_if(int b, char* msg, int line)
|
||||
{
|
||||
if(!b)
|
||||
return;
|
||||
fprintf(stderr, "Error at line %d: %s\n", line, msg);
|
||||
//fprintf(stderr, " sysmsg: %s\n", strerror(errno));
|
||||
exit(1);
|
||||
}
|
||||
|
||||
#define print_info(args...) do { if(!g_quiet) fprintf(stderr, args); } while(0);
|
||||
|
||||
void parse_arg(char *arg, int* paddr, int *psize)
|
||||
{
|
||||
char *end;
|
||||
*paddr = strtoul(arg, &end, 0);
|
||||
if(*end == ':')
|
||||
*psize = strtoul(++end, 0, 0);
|
||||
}
|
||||
|
||||
int confirm_action()
|
||||
{
|
||||
fprintf(stderr,
|
||||
"\n"
|
||||
"____________________________WARNING____________________________\n"
|
||||
"Erroneously writing to a system EEPROM (like DIMM SPD modules)\n"
|
||||
"can break your system. It will NOT boot anymore so you'll not\n"
|
||||
"be able to fix it.\n"
|
||||
"\n"
|
||||
"Reading from 8bit EEPROMs (like that in your DIMM) without using\n"
|
||||
"the -8 switch can also UNEXPECTEDLY write to them, so be sure to\n"
|
||||
"use the -8 command param when required.\n"
|
||||
"\n"
|
||||
"Use -f to disable this warning message\n"
|
||||
"\n"
|
||||
"Press ENTER to continue or hit CTRL-C to exit\n"
|
||||
"\n"
|
||||
);
|
||||
getchar();
|
||||
return 1;
|
||||
}
|
||||
|
||||
int read_from_eeprom(struct eeprom *e, int addr, int size, int hex)
|
||||
{
|
||||
int ch, i;
|
||||
for(i = 0; i < size; ++i, ++addr)
|
||||
{
|
||||
die_if((ch = eeprom_read_byte(e, addr)) < 0, "read error");
|
||||
if(hex)
|
||||
{
|
||||
if( (i % 16) == 0 )
|
||||
printf("\n %.4x| ", addr);
|
||||
else if( (i % 8) == 0 )
|
||||
printf(" ");
|
||||
printf("%.2x ", ch);
|
||||
} else
|
||||
putchar(ch);
|
||||
}
|
||||
if(hex)
|
||||
printf("\n\n");
|
||||
fflush(stdout);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int write_to_eeprom(struct eeprom *e, int addr)
|
||||
{
|
||||
int c;
|
||||
while((c = getchar()) != EOF)
|
||||
{
|
||||
print_info(".");
|
||||
fflush(stdout);
|
||||
die_if(eeprom_write_byte(e, addr++, c), "write error");
|
||||
}
|
||||
print_info("\n\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main(int argc, char** argv)
|
||||
{
|
||||
struct eeprom e;
|
||||
int ret, op, i2c_addr, memaddr, size, want_hex, dummy, force, sixteen;
|
||||
char *device, *arg = 0, *i2c_addr_s;
|
||||
struct stat st;
|
||||
int eeprom_type = 0;
|
||||
|
||||
op = want_hex = dummy = force = sixteen = 0;
|
||||
g_quiet = 0;
|
||||
|
||||
while((ret = getopt(argc, argv, "1:8fr:qhw:xd")) != -1)
|
||||
{
|
||||
switch(ret)
|
||||
{
|
||||
case '1':
|
||||
usage_if(*optarg != '6' || strlen(optarg) != 1);
|
||||
die_if(eeprom_type, "EEPROM type switch (-8 or -16) used twice");
|
||||
eeprom_type = EEPROM_TYPE_16BIT_ADDR;
|
||||
break;
|
||||
case 'x':
|
||||
want_hex++;
|
||||
break;
|
||||
case 'd':
|
||||
dummy++;
|
||||
break;
|
||||
case '8':
|
||||
die_if(eeprom_type, "EEPROM type switch (-8 or -16) used twice");
|
||||
eeprom_type = EEPROM_TYPE_8BIT_ADDR;
|
||||
break;
|
||||
case 'f':
|
||||
force++;
|
||||
break;
|
||||
case 'q':
|
||||
g_quiet++;
|
||||
break;
|
||||
case 'h':
|
||||
usage_if(1);
|
||||
break;
|
||||
default:
|
||||
die_if(op != 0, "Both read and write requested");
|
||||
arg = optarg;
|
||||
op = ret;
|
||||
}
|
||||
}
|
||||
if(!eeprom_type)
|
||||
eeprom_type = EEPROM_TYPE_8BIT_ADDR; // default
|
||||
|
||||
usage_if(op == 0); // no switches
|
||||
// set device and i2c_addr reading from cmdline or env
|
||||
device = i2c_addr_s = 0;
|
||||
switch(argc - optind)
|
||||
{
|
||||
case 0:
|
||||
device = getenv(ENV_DEV);
|
||||
i2c_addr_s = getenv(ENV_I2C_ADDR);
|
||||
break;
|
||||
case 1:
|
||||
if(stat(argv[optind], &st) != -1)
|
||||
{
|
||||
device = argv[optind];
|
||||
i2c_addr_s = getenv(ENV_I2C_ADDR);
|
||||
} else {
|
||||
device = getenv(ENV_DEV);
|
||||
i2c_addr_s = argv[optind];
|
||||
}
|
||||
break;
|
||||
case 2:
|
||||
device = argv[optind++];
|
||||
i2c_addr_s = argv[optind];
|
||||
break;
|
||||
default:
|
||||
usage_if(1);
|
||||
}
|
||||
usage_if(!device || !i2c_addr_s);
|
||||
i2c_addr = strtoul(i2c_addr_s, 0, 0);
|
||||
|
||||
print_info("eeprog %s, a 24Cxx EEPROM reader/writer\n", VERSION);
|
||||
print_info("Copyright (c) 2003-2004 by Stefano Barbato - All rights reserved.\n");
|
||||
print_info(" Bus: %s, Address: 0x%x, Mode: %dbit\n",
|
||||
device, i2c_addr,
|
||||
(eeprom_type == EEPROM_TYPE_8BIT_ADDR ? 8 : 16) );
|
||||
if(dummy)
|
||||
{
|
||||
fprintf(stderr, "Dummy mode selected, nothing done.\n");
|
||||
return 0;
|
||||
}
|
||||
die_if(eeprom_open(device, i2c_addr, eeprom_type, &e) < 0,
|
||||
"unable to open eeprom device file "
|
||||
"(check that the file exists and that it's readable)");
|
||||
switch(op)
|
||||
{
|
||||
case 'r':
|
||||
if(force == 0)
|
||||
confirm_action();
|
||||
size = 1; // default
|
||||
parse_arg(arg, &memaddr, &size);
|
||||
print_info(" Reading %d bytes from 0x%x\n", size, memaddr);
|
||||
read_from_eeprom(&e, memaddr, size, want_hex);
|
||||
break;
|
||||
case 'w':
|
||||
if(force == 0)
|
||||
confirm_action();
|
||||
parse_arg(arg, &memaddr, &size);
|
||||
print_info(" Writing stdin starting at address 0x%x\n",
|
||||
memaddr);
|
||||
write_to_eeprom(&e, memaddr);
|
||||
break;
|
||||
default:
|
||||
usage_if(1);
|
||||
exit(1);
|
||||
}
|
||||
eeprom_close(&e);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
361
i2c-dev.h
Normal file
361
i2c-dev.h
Normal file
|
@ -0,0 +1,361 @@
|
|||
/*
|
||||
i2c-dev.h - i2c-bus driver, char device interface
|
||||
|
||||
Copyright (C) 1995-97 Simon G. Vogl
|
||||
Copyright (C) 1998-99 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.
|
||||
*/
|
||||
|
||||
/* $Id: i2c-dev.h,v 1.4 2003/11/27 23:08:06 tat Exp $ */
|
||||
|
||||
#ifndef LIB_I2CDEV_H
|
||||
#define LIB_I2CDEV_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <sys/ioctl.h>
|
||||
|
||||
|
||||
/* -- i2c.h -- */
|
||||
|
||||
|
||||
/*
|
||||
* I2C Message - used for pure i2c transaction, also from /dev interface
|
||||
*/
|
||||
struct i2c_msg {
|
||||
__u16 addr; /* slave address */
|
||||
unsigned short flags;
|
||||
#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
|
||||
#define I2C_M_RD 0x01
|
||||
#define I2C_M_NOSTART 0x4000
|
||||
#define I2C_M_REV_DIR_ADDR 0x2000
|
||||
#define I2C_M_IGNORE_NAK 0x1000
|
||||
#define I2C_M_NO_RD_ACK 0x0800
|
||||
short len; /* msg length */
|
||||
char *buf; /* pointer to msg data */
|
||||
int err;
|
||||
short done;
|
||||
};
|
||||
|
||||
/* To determine what functionality is present */
|
||||
|
||||
#define I2C_FUNC_I2C 0x00000001
|
||||
#define I2C_FUNC_10BIT_ADDR 0x00000002
|
||||
#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
|
||||
#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
|
||||
#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
|
||||
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
|
||||
#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
|
||||
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
|
||||
#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
|
||||
#define I2C_FUNC_SMBUS_QUICK 0x00010000
|
||||
#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
|
||||
#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
|
||||
#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
|
||||
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
|
||||
#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
|
||||
#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
|
||||
#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
|
||||
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
|
||||
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
|
||||
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
|
||||
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
|
||||
#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
|
||||
#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
|
||||
#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
|
||||
#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
|
||||
|
||||
#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
|
||||
I2C_FUNC_SMBUS_WRITE_BYTE
|
||||
#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
|
||||
I2C_FUNC_SMBUS_WRITE_BYTE_DATA
|
||||
#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
|
||||
I2C_FUNC_SMBUS_WRITE_WORD_DATA
|
||||
#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
|
||||
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
|
||||
#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
|
||||
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
|
||||
#define I2C_FUNC_SMBUS_I2C_BLOCK_2 I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
|
||||
I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2
|
||||
#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
|
||||
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC
|
||||
#define I2C_FUNC_SMBUS_WORD_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
|
||||
I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC
|
||||
|
||||
#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
|
||||
#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
|
||||
#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
|
||||
#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
|
||||
#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
|
||||
#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
|
||||
|
||||
#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
|
||||
I2C_FUNC_SMBUS_BYTE | \
|
||||
I2C_FUNC_SMBUS_BYTE_DATA | \
|
||||
I2C_FUNC_SMBUS_WORD_DATA | \
|
||||
I2C_FUNC_SMBUS_PROC_CALL | \
|
||||
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
|
||||
I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
|
||||
I2C_FUNC_SMBUS_I2C_BLOCK
|
||||
|
||||
/*
|
||||
* Data for SMBus Messages
|
||||
*/
|
||||
#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
|
||||
#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
|
||||
union i2c_smbus_data {
|
||||
__u8 byte;
|
||||
__u16 word;
|
||||
__u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
|
||||
/* one more for read length in block process call */
|
||||
/* and one more for PEC */
|
||||
};
|
||||
|
||||
/* smbus_access read or write markers */
|
||||
#define I2C_SMBUS_READ 1
|
||||
#define I2C_SMBUS_WRITE 0
|
||||
|
||||
/* SMBus transaction types (size parameter in the above functions)
|
||||
Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
|
||||
#define I2C_SMBUS_QUICK 0
|
||||
#define I2C_SMBUS_BYTE 1
|
||||
#define I2C_SMBUS_BYTE_DATA 2
|
||||
#define I2C_SMBUS_WORD_DATA 3
|
||||
#define I2C_SMBUS_PROC_CALL 4
|
||||
#define I2C_SMBUS_BLOCK_DATA 5
|
||||
#define I2C_SMBUS_I2C_BLOCK_DATA 6
|
||||
#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
|
||||
#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
|
||||
|
||||
|
||||
/* ----- commands for the ioctl like i2c_command call:
|
||||
* note that additional calls are defined in the algorithm and hw
|
||||
* dependent layers - these can be listed here, or see the
|
||||
* corresponding header files.
|
||||
*/
|
||||
/* -> bit-adapter specific ioctls */
|
||||
#define I2C_RETRIES 0x0701 /* number of times a device address */
|
||||
/* should be polled when not */
|
||||
/* acknowledging */
|
||||
#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
|
||||
|
||||
|
||||
/* this is for i2c-dev.c */
|
||||
#define I2C_SLAVE 0x0703 /* Change slave address */
|
||||
/* Attn.: Slave address is 7 or 10 bits */
|
||||
#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
|
||||
/* Attn.: Slave address is 7 or 10 bits */
|
||||
/* This changes the address, even if it */
|
||||
/* is already taken! */
|
||||
#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
|
||||
|
||||
#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
|
||||
#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
|
||||
#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
|
||||
#if 0
|
||||
#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
|
||||
#endif
|
||||
|
||||
#define I2C_SMBUS 0x0720 /* SMBus-level access */
|
||||
|
||||
/* -- i2c.h -- */
|
||||
|
||||
|
||||
/* Note: 10-bit addresses are NOT supported! */
|
||||
|
||||
/* This is the structure as used in the I2C_SMBUS ioctl call */
|
||||
struct i2c_smbus_ioctl_data {
|
||||
char read_write;
|
||||
__u8 command;
|
||||
int size;
|
||||
union i2c_smbus_data *data;
|
||||
};
|
||||
|
||||
/* This is the structure as used in the I2C_RDWR ioctl call */
|
||||
struct i2c_rdwr_ioctl_data {
|
||||
struct i2c_msg *msgs; /* pointers to i2c_msgs */
|
||||
int nmsgs; /* number of i2c_msgs */
|
||||
};
|
||||
|
||||
|
||||
static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command,
|
||||
int size, union i2c_smbus_data *data)
|
||||
{
|
||||
struct i2c_smbus_ioctl_data args;
|
||||
|
||||
args.read_write = read_write;
|
||||
args.command = command;
|
||||
args.size = size;
|
||||
args.data = data;
|
||||
return ioctl(file,I2C_SMBUS,&args);
|
||||
}
|
||||
|
||||
|
||||
static inline __s32 i2c_smbus_write_quick(int file, __u8 value)
|
||||
{
|
||||
return i2c_smbus_access(file,value,0,I2C_SMBUS_QUICK,NULL);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_read_byte(int file)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,0,I2C_SMBUS_BYTE,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FF & data.byte;
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_byte(int file, __u8 value)
|
||||
{
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,value,
|
||||
I2C_SMBUS_BYTE,NULL);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_BYTE_DATA,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FF & data.byte;
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command,
|
||||
__u8 value)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
data.byte = value;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_BYTE_DATA, &data);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_read_word_data(int file, __u8 command)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_WORD_DATA,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FFFF & data.word;
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_word_data(int file, __u8 command,
|
||||
__u16 value)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
data.word = value;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_WORD_DATA, &data);
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
data.word = value;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_PROC_CALL,&data))
|
||||
return -1;
|
||||
else
|
||||
return 0x0FFFF & data.word;
|
||||
}
|
||||
|
||||
|
||||
/* Returns the number of read bytes */
|
||||
static inline __s32 i2c_smbus_read_block_data(int file, __u8 command,
|
||||
__u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_BLOCK_DATA,&data))
|
||||
return -1;
|
||||
else {
|
||||
for (i = 1; i <= data.block[0]; i++)
|
||||
values[i-1] = data.block[i];
|
||||
return data.block[0];
|
||||
}
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_block_data(int file, __u8 command,
|
||||
__u8 length, __u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (length > 32)
|
||||
length = 32;
|
||||
for (i = 1; i <= length; i++)
|
||||
data.block[i] = values[i-1];
|
||||
data.block[0] = length;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_BLOCK_DATA, &data);
|
||||
}
|
||||
|
||||
/* Returns the number of read bytes */
|
||||
static inline __s32 i2c_smbus_read_i2c_block_data(int file, __u8 command,
|
||||
__u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
|
||||
I2C_SMBUS_I2C_BLOCK_DATA,&data))
|
||||
return -1;
|
||||
else {
|
||||
for (i = 1; i <= data.block[0]; i++)
|
||||
values[i-1] = data.block[i];
|
||||
return data.block[0];
|
||||
}
|
||||
}
|
||||
|
||||
static inline __s32 i2c_smbus_write_i2c_block_data(int file, __u8 command,
|
||||
__u8 length, __u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (length > 32)
|
||||
length = 32;
|
||||
for (i = 1; i <= length; i++)
|
||||
data.block[i] = values[i-1];
|
||||
data.block[0] = length;
|
||||
return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_I2C_BLOCK_DATA, &data);
|
||||
}
|
||||
|
||||
/* Returns the number of read bytes */
|
||||
static inline __s32 i2c_smbus_block_process_call(int file, __u8 command,
|
||||
__u8 length, __u8 *values)
|
||||
{
|
||||
union i2c_smbus_data data;
|
||||
int i;
|
||||
if (length > 32)
|
||||
length = 32;
|
||||
for (i = 1; i <= length; i++)
|
||||
data.block[i] = values[i-1];
|
||||
data.block[0] = length;
|
||||
if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
|
||||
I2C_SMBUS_BLOCK_PROC_CALL,&data))
|
||||
return -1;
|
||||
else {
|
||||
for (i = 1; i <= data.block[0]; i++)
|
||||
values[i-1] = data.block[i];
|
||||
return data.block[0];
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#endif /* LIB_I2CDEV_H */
|
Loading…
Reference in a new issue