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Code Issues Releases Wiki Activity

add PEC support

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1445 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark D. Studebaker
2002-07-11 02:24:56 +00:00
parent ecc5086d39
commit 1a6cc8f95d
1 changed files with 78 additions and 22 deletions
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100
prog/dump/i2cdump.c
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@@ -1,6 +1,6 @@
/*
i2cdump.c - Part of i2cdump, a user-space program to dump I2C registers
Copyright (c) 2000 Frodo Looijaard <frodol@dds.nl>, and
Copyright (c) 2002 Frodo Looijaard <frodol@dds.nl>, and
Mark D. Studebaker <mdsxyz123@yahoo.com>
This program is free software; you can redistribute it and/or modify
@@ -37,6 +37,9 @@
#define USE_I2C_BLOCK 0
#endif
#ifdef I2C_FUNC_SMBUS_BLOCK_DATA_PEC
#define HAVE_PEC 1
#endif
void help(void)
{
@@ -45,6 +48,7 @@ void help(void)
fprintf(stderr,"Syntax: i2cdump I2CBUS ADDRESS [MODE] [BANK [BANKREG]]\n");
fprintf(stderr," MODE is 'b[yte]', 'w[ord]', 's[mbusblock], or 'i[2cblock]' (default b)\n");
fprintf(stderr," Append MODE with 'p' for PEC checking\n");
fprintf(stderr," I2CBUS is an integer\n");
fprintf(stderr," ADDRESS is an integer 0x00 - 0x7f\n");
fprintf(stderr," BANK and BANKREG are for byte and word accesses (default bank 0, reg 0x4e)\n");
@@ -70,6 +74,7 @@ int main(int argc, char *argv[])
long funcs;
unsigned char cblock[256];
int block[256];
int pec = 0;
if (argc < 2) {
fprintf(stderr,"Error: No i2c-bus specified!\n");
@@ -105,15 +110,18 @@ int main(int argc, char *argv[])
}
if (argc < 4) {
fprintf(stderr,"Warning: no size specified (using byte-data access)\n");
fprintf(stderr,"No size specified (using byte-data access)\n");
size = I2C_SMBUS_BYTE_DATA;
} else if (!strcmp(argv[3],"b"))
} else if (!strncmp(argv[3],"b",1)) {
size = I2C_SMBUS_BYTE_DATA;
else if (!strcmp(argv[3],"w"))
pec = argv[3][1] == 'p';
} else if (!strncmp(argv[3],"w",1)) {
size = I2C_SMBUS_WORD_DATA;
else if (!strcmp(argv[3],"s"))
pec = argv[3][1] == 'p';
} else if (!strncmp(argv[3],"s",1)) {
size = I2C_SMBUS_BLOCK_DATA;
else if (!strcmp(argv[3],"i"))
pec = argv[3][1] == 'p';
} else if (!strcmp(argv[3],"i"))
size = I2C_SMBUS_I2C_BLOCK_DATA;
else {
fprintf(stderr,"Error: Invalid mode!\n");
@@ -213,27 +221,60 @@ int main(int argc, char *argv[])
switch(size) {
case I2C_SMBUS_BYTE_DATA:
if (! (funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have byte read capability\n");
exit(1);
}
#ifdef HAVE_PEC
if(pec) {
if (! (funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have byte read w/ PEC capability\n");
exit(1);
}
} else
#endif
{
if (! (funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have byte read capability\n");
exit(1);
}
}
break;
case I2C_SMBUS_WORD_DATA:
if (! (funcs & I2C_FUNC_SMBUS_READ_WORD_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have word read capability\n");
exit(1);
}
#ifdef HAVE_PEC
if(pec) {
if (! (funcs & I2C_FUNC_SMBUS_READ_WORD_DATA_PEC)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have word read w/ PEC capability\n");
exit(1);
}
} else
#endif
{
if (! (funcs & I2C_FUNC_SMBUS_READ_WORD_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have word read capability\n");
exit(1);
}
}
break;
case I2C_SMBUS_BLOCK_DATA:
if (! (funcs & I2C_FUNC_SMBUS_READ_BLOCK_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have smbus block read capability\n");
exit(1);
}
#ifdef HAVE_PEC
if(pec) {
if (! (funcs & I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have smbus block read capability\n");
exit(1);
}
} else
#endif
{
if (! (funcs & I2C_FUNC_SMBUS_READ_BLOCK_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d", i2cbus);
fprintf(stderr, " does not have smbus block read w/ PEC capability\n");
exit(1);
}
}
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
@@ -253,18 +294,33 @@ int main(int argc, char *argv[])
exit(1);
}
if(pec) {
#ifdef HAVE_PEC
if (ioctl(file,I2C_PEC, 1) < 0) {
fprintf(stderr,"Error: Could not set PEC: %s\n", strerror(errno));
exit(1);
}
#else
fprintf(stderr,"Error: PEC not supported in your kernel\n");
exit(1);
#endif
}
fprintf(stderr," WARNING! This program can confuse your I2C bus, "
"cause data loss and worse!\n");
fprintf(stderr," I will probe file %s, address 0x%x, mode %s\n",
filename,address,size == I2C_SMBUS_BLOCK_DATA ? "smbus block" :
size == I2C_SMBUS_I2C_BLOCK_DATA ? "i2c block" :
size == I2C_SMBUS_BYTE_DATA ? "byte" : "word");
if(bank)
if(pec)
fprintf(stderr," with PEC checking.\n", bank);
if(bank) {
if(size == I2C_SMBUS_BLOCK_DATA)
fprintf(stderr," Using command 0x%02x.\n", bank);
else
fprintf(stderr," Probing bank %d using bank register 0x%02x.\n",
bank, bankreg);
}
fprintf(stderr," You have five seconds to reconsider and press CTRL-C!\n\n");
sleep(5);