static int confirm(const char *filename, int address, int size, int daddress,
int pec)
{
int dont = 0;
fprintf(stderr, "WARNING! This program can confuse your I2C "
"bus, cause data loss and worse!\n");
/* Don't let the user break his/her EEPROMs */
if (address >= 0x50 && address <= 0x57 && pec) {
fprintf(stderr, "STOP! EEPROMs are I2C devices, not "
"SMBus devices. Using PEC\non I2C devices may "
"result in unexpected results, such as\n"
"trashing the contents of EEPROMs. We can't "
"let you do that, sorry.\n");
return 0;
}
if (size == I2C_SMBUS_BYTE && daddress >= 0 && pec) {
fprintf(stderr, "WARNING! All I2C chips and some SMBus chips "
"will interpret a write\nbyte command with PEC as a"
"write byte data command, effectively writing a\n"
"value into a register!\n");
dont++;
}
fprintf(stderr, "I will read from device file %s, chip "
"address 0x%02x, ", filename, address);
if (daddress < 0)
fprintf(stderr, "current data\naddress");
else
fprintf(stderr, "data address\n0x%02x", daddress);
fprintf(stderr, ", using %s.\n",
size == I2C_SMBUS_BYTE ? (daddress < 0 ?
"read byte" : "write byte/read byte") :
size == I2C_SMBUS_BYTE_DATA ? "read byte data" :
"read word data");
if (pec)
fprintf(stderr, "PEC checking enabled.\n");
fprintf(stderr, "Continue? [%s] ", dont ? "y/N" : "Y/n");
fflush(stderr);
if (!user_ack(!dont)) {
fprintf(stderr, "Aborting on user request.\n");
return 0;
}
return 1;
}
static int confirm(const char *filename, int address, int size, int daddress,
int value, int vmask, const unsigned char *block, int len,
int pec)
{
int dont = 0;
fprintf(stderr, "WARNING! This program can confuse your I2C "
"bus, cause data loss and worse!\n");
if (address >= 0x50 && address <= 0x57) {
fprintf(stderr, "DANGEROUS! Writing to a serial "
"EEPROM on a memory DIMM\nmay render your "
"memory USELESS and make your system "
"UNBOOTABLE!\n");
dont++;
}
fprintf(stderr, "I will write to device file %s, chip address "
"0x%02x, data address\n0x%02x, ", filename, address, daddress);
if (size == I2C_SMBUS_BYTE)
fprintf(stderr, "no data.\n");
else if (size == I2C_SMBUS_BLOCK_DATA ||
size == I2C_SMBUS_I2C_BLOCK_DATA) {
int i;
fprintf(stderr, "data");
for (i = 0; i < len; i++)
fprintf(stderr, " 0x%02x", block[i]);
fprintf(stderr, ", mode %s.\n", size == I2C_SMBUS_BLOCK_DATA
? "smbus block" : "i2c block");
} else
fprintf(stderr, "data 0x%02x%s, mode %s.\n", value,
vmask ? " (masked)" : "",
size == I2C_SMBUS_BYTE_DATA ? "byte" : "word");
if (pec)
fprintf(stderr, "PEC checking enabled.\n");
fprintf(stderr, "Continue? [%s] ", dont ? "y/N" : "Y/n");
fflush(stderr);
if (!user_ack(!dont)) {
fprintf(stderr, "Aborting on user request.\n");
return 0;
}
return 1;
}
int main(int argc, char *argv[])
{
char *end;
const char *maskp = NULL;
int res, i2cbus, address, size, file;
int value, daddress, vmask = 0;
char filename[20];
int pec = 0;
int flags = 0;
int force = 0, yes = 0, version = 0, readback = 0;
unsigned char block[I2C_SMBUS_BLOCK_MAX];
int len;
/* handle (optional) flags first */
while (1+flags < argc && argv[1+flags][0] == '-') {
switch (argv[1+flags][1]) {
case 'V': version = 1; break;
case 'f': force = 1; break;
case 'y': yes = 1; break;
case 'm':
if (2+flags < argc)
maskp = argv[2+flags];
flags++;
break;
case 'r': readback = 1; break;
default:
fprintf(stderr, "Error: Unsupported option "
"\"%s\"!\n", argv[1+flags]);
help();
exit(1);
}
flags++;
}
if (version) {
fprintf(stderr, "i2cset version %s\n", VERSION);
exit(0);
}
if (argc < flags + 4)
help();
i2cbus = lookup_i2c_bus(argv[flags+1]);
if (i2cbus < 0)
help();
address = parse_i2c_address(argv[flags+2]);
if (address < 0)
help();
daddress = strtol(argv[flags+3], &end, 0);
if (*end || daddress < 0 || daddress > 0xff) {
fprintf(stderr, "Error: Data address invalid!\n");
help();
}
/* check for command/mode */
if (argc == flags + 4) {
/* Implicit "c" */
size = I2C_SMBUS_BYTE;
} else if (argc == flags + 5) {
/* "c", "cp", or implicit "b" */
if (!strcmp(argv[flags+4], "c")
|| !strcmp(argv[flags+4], "cp")) {
size = I2C_SMBUS_BYTE;
pec = argv[flags+4][1] == 'p';
} else {
size = I2C_SMBUS_BYTE_DATA;
}
} else {
/* All other commands */
if (strlen(argv[argc-1]) > 2
|| (strlen(argv[argc-1]) == 2 && argv[argc-1][1] != 'p')) {
fprintf(stderr, "Error: Invalid mode '%s'!\n", argv[argc-1]);
help();
}
switch (argv[argc-1][0]) {
case 'b': size = I2C_SMBUS_BYTE_DATA; break;
case 'w': size = I2C_SMBUS_WORD_DATA; break;
case 's': size = I2C_SMBUS_BLOCK_DATA; break;
case 'i': size = I2C_SMBUS_I2C_BLOCK_DATA; break;
default:
fprintf(stderr, "Error: Invalid mode '%s'!\n", argv[argc-1]);
help();
}
pec = argv[argc-1][1] == 'p';
if (size == I2C_SMBUS_BLOCK_DATA || size == I2C_SMBUS_I2C_BLOCK_DATA) {
if (pec && size == I2C_SMBUS_I2C_BLOCK_DATA) {
fprintf(stderr, "Error: PEC not supported for I2C block writes!\n");
help();
}
if (maskp) {
fprintf(stderr, "Error: Mask not supported for block writes!\n");
help();
}
if (argc > (int)sizeof(block) + flags + 5) {
fprintf(stderr, "Error: Too many arguments!\n");
help();
}
} else if (argc != flags + 6) {
fprintf(stderr, "Error: Too many arguments!\n");
help();
}
}
len = 0; /* Must always initialize len since it is passed to confirm() */
/* read values from command line */
switch (size) {
case I2C_SMBUS_BYTE_DATA:
case I2C_SMBUS_WORD_DATA:
value = strtol(argv[flags+4], &end, 0);
if (*end || value < 0) {
fprintf(stderr, "Error: Data value invalid!\n");
help();
}
if ((size == I2C_SMBUS_BYTE_DATA && value > 0xff)
|| (size == I2C_SMBUS_WORD_DATA && value > 0xffff)) {
fprintf(stderr, "Error: Data value out of range!\n");
help();
}
break;
case I2C_SMBUS_BLOCK_DATA:
case I2C_SMBUS_I2C_BLOCK_DATA:
for (len = 0; len + flags + 5 < argc; len++) {
value = strtol(argv[flags + len + 4], &end, 0);
if (*end || value < 0) {
fprintf(stderr, "Error: Data value invalid!\n");
help();
}
if (value > 0xff) {
fprintf(stderr, "Error: Data value out of range!\n");
help();
}
block[len] = value;
}
value = -1;
break;
default:
value = -1;
break;
}
if (maskp) {
vmask = strtol(maskp, &end, 0);
if (*end || vmask == 0) {
fprintf(stderr, "Error: Data value mask invalid!\n");
help();
}
if (((size == I2C_SMBUS_BYTE || size == I2C_SMBUS_BYTE_DATA)
&& vmask > 0xff) || vmask > 0xffff) {
fprintf(stderr, "Error: Data value mask out of range!\n");
help();
}
}
file = open_i2c_dev(i2cbus, filename, sizeof(filename), 0);
if (file < 0
|| check_funcs(file, size, pec)
|| set_slave_addr(file, address, force))
exit(1);
if (!yes && !confirm(filename, address, size, daddress,
value, vmask, block, len, pec))
exit(0);
if (vmask) {
int oldvalue;
switch (size) {
case I2C_SMBUS_BYTE:
oldvalue = i2c_smbus_read_byte(file);
break;
case I2C_SMBUS_WORD_DATA:
oldvalue = i2c_smbus_read_word_data(file, daddress);
break;
default:
oldvalue = i2c_smbus_read_byte_data(file, daddress);
}
if (oldvalue < 0) {
fprintf(stderr, "Error: Failed to read old value\n");
exit(1);
}
value = (value & vmask) | (oldvalue & ~vmask);
if (!yes) {
fprintf(stderr, "Old value 0x%0*x, write mask "
"0x%0*x: Will write 0x%0*x to register "
"0x%02x\n",
size == I2C_SMBUS_WORD_DATA ? 4 : 2, oldvalue,
size == I2C_SMBUS_WORD_DATA ? 4 : 2, vmask,
size == I2C_SMBUS_WORD_DATA ? 4 : 2, value,
daddress);
fprintf(stderr, "Continue? [Y/n] ");
fflush(stderr);
if (!user_ack(1)) {
fprintf(stderr, "Aborting on user request.\n");
exit(0);
}
}
}
if (pec && ioctl(file, I2C_PEC, 1) < 0) {
fprintf(stderr, "Error: Could not set PEC: %s\n",
strerror(errno));
close(file);
exit(1);
}
switch (size) {
case I2C_SMBUS_BYTE:
res = i2c_smbus_write_byte(file, daddress);
break;
case I2C_SMBUS_WORD_DATA:
res = i2c_smbus_write_word_data(file, daddress, value);
break;
case I2C_SMBUS_BLOCK_DATA:
res = i2c_smbus_write_block_data(file, daddress, len, block);
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
res = i2c_smbus_write_i2c_block_data(file, daddress, len, block);
break;
default: /* I2C_SMBUS_BYTE_DATA */
res = i2c_smbus_write_byte_data(file, daddress, value);
break;
}
if (res < 0) {
fprintf(stderr, "Error: Write failed\n");
close(file);
exit(1);
}
if (pec) {
if (ioctl(file, I2C_PEC, 0) < 0) {
fprintf(stderr, "Error: Could not clear PEC: %s\n",
strerror(errno));
close(file);
exit(1);
}
}
if (!readback) { /* We're done */
close(file);
exit(0);
}
switch (size) {
case I2C_SMBUS_BYTE:
res = i2c_smbus_read_byte(file);
value = daddress;
break;
case I2C_SMBUS_WORD_DATA:
res = i2c_smbus_read_word_data(file, daddress);
break;
default: /* I2C_SMBUS_BYTE_DATA */
res = i2c_smbus_read_byte_data(file, daddress);
}
close(file);
if (res < 0) {
printf("Warning - readback failed\n");
} else
if (res != value) {
printf("Warning - data mismatch - wrote "
"0x%0*x, read back 0x%0*x\n",
size == I2C_SMBUS_WORD_DATA ? 4 : 2, value,
size == I2C_SMBUS_WORD_DATA ? 4 : 2, res);
} else {
printf("Value 0x%0*x written, readback matched\n",
size == I2C_SMBUS_WORD_DATA ? 4 : 2, value);
}
exit(0);
}
int main(int argc, char *argv[])
{
char *end;
const char *maskp = NULL;
int res, i2cbus, address, size, file;
int value, daddress, vmask = 0;
char filename[20];
int pec = 0;
int flags = 0;
int force = 0, yes = 0, version = 0, readback = 0;
/* handle (optional) flags first */
while (1+flags < argc && argv[1+flags][0] == '-') {
switch (argv[1+flags][1]) {
case 'V': version = 1; break;
case 'f': force = 1; break;
case 'y': yes = 1; break;
case 'm':
if (2+flags < argc)
maskp = argv[2+flags];
flags++;
break;
case 'r': readback = 1; break;
default:
fprintf(stderr, "Error: Unsupported option "
"\"%s\"!\n", argv[1+flags]);
help();
exit(1);
}
flags++;
}
if (version) {
fprintf(stderr, "i2cset version %s\n", VERSION);
exit(0);
}
if (argc < flags + 4)
help();
i2cbus = lookup_i2c_bus(argv[flags+1]);
if (i2cbus < 0)
help();
address = parse_i2c_address(argv[flags+2]);
if (address < 0)
help();
daddress = strtol(argv[flags+3], &end, 0);
if (*end || daddress < 0 || daddress > 0xff) {
fprintf(stderr, "Error: Data address invalid!\n");
help();
}
if (argc > flags + 4) {
size = I2C_SMBUS_BYTE_DATA;
value = strtol(argv[flags+4], &end, 0);
if (*end || value < 0) {
fprintf(stderr, "Error: Data value invalid!\n");
help();
}
} else {
size = I2C_SMBUS_BYTE;
value = -1;
}
if (argc > flags + 5) {
switch (argv[flags+5][0]) {
case 'b': size = I2C_SMBUS_BYTE_DATA; break;
case 'w': size = I2C_SMBUS_WORD_DATA; break;
default:
fprintf(stderr, "Error: Invalid mode!\n");
help();
}
pec = argv[flags+5][1] == 'p';
}
/* Old method to provide the value mask, deprecated and no longer
documented but still supported for compatibility */
if (argc > flags + 6) {
if (maskp) {
fprintf(stderr, "Error: Data value mask provided twice!\n");
help();
}
fprintf(stderr, "Warning: Using deprecated way to set the data value mask!\n");
fprintf(stderr, " Please switch to using -m.\n");
maskp = argv[flags+6];
}
if (maskp) {
vmask = strtol(maskp, &end, 0);
if (*end || vmask == 0) {
fprintf(stderr, "Error: Data value mask invalid!\n");
help();
}
}
if ((size == I2C_SMBUS_BYTE_DATA && value > 0xff)
|| (size == I2C_SMBUS_WORD_DATA && value > 0xffff)) {
fprintf(stderr, "Error: Data value out of range!\n");
help();
}
file = open_i2c_dev(i2cbus, filename, 0);
if (file < 0
|| check_funcs(file, size, pec)
|| set_slave_addr(file, address, force))
exit(1);
if (!yes && !confirm(filename, address, size, daddress,
value, vmask, pec))
exit(0);
if (vmask) {
int oldvalue;
switch (size) {
case I2C_SMBUS_BYTE:
oldvalue = i2c_smbus_read_byte(file);
break;
case I2C_SMBUS_WORD_DATA:
oldvalue = i2c_smbus_read_word_data(file, daddress);
break;
default:
oldvalue = i2c_smbus_read_byte_data(file, daddress);
}
if (oldvalue < 0) {
fprintf(stderr, "Error: Failed to read old value\n");
exit(1);
}
value = (value & vmask) | (oldvalue & ~vmask);
if (!yes) {
fprintf(stderr, "Old value 0x%0*x, write mask "
"0x%0*x: Will write 0x%0*x to register "
"0x%02x\n",
size == I2C_SMBUS_WORD_DATA ? 4 : 2, oldvalue,
size == I2C_SMBUS_WORD_DATA ? 4 : 2, vmask,
size == I2C_SMBUS_WORD_DATA ? 4 : 2, value,
daddress);
fprintf(stderr, "Continue? [Y/n] ");
fflush(stderr);
if (!user_ack(1)) {
fprintf(stderr, "Aborting on user request.\n");
exit(0);
}
}
}
if (pec && ioctl(file, I2C_PEC, 1) < 0) {
fprintf(stderr, "Error: Could not set PEC: %s\n",
strerror(errno));
close(file);
exit(1);
}
switch (size) {
case I2C_SMBUS_BYTE:
res = i2c_smbus_write_byte(file, daddress);
break;
case I2C_SMBUS_WORD_DATA:
res = i2c_smbus_write_word_data(file, daddress, value);
break;
default: /* I2C_SMBUS_BYTE_DATA */
res = i2c_smbus_write_byte_data(file, daddress, value);
}
if (res < 0) {
fprintf(stderr, "Error: Write failed\n");
close(file);
exit(1);
}
if (pec) {
if (ioctl(file, I2C_PEC, 0) < 0) {
fprintf(stderr, "Error: Could not clear PEC: %s\n",
strerror(errno));
close(file);
exit(1);
}
}
if (!readback) { /* We're done */
close(file);
exit(0);
}
switch (size) {
case I2C_SMBUS_BYTE:
res = i2c_smbus_read_byte(file);
value = daddress;
break;
case I2C_SMBUS_WORD_DATA:
res = i2c_smbus_read_word_data(file, daddress);
break;
default: /* I2C_SMBUS_BYTE_DATA */
res = i2c_smbus_read_byte_data(file, daddress);
}
close(file);
if (res < 0) {
printf("Warning - readback failed\n");
} else
if (res != value) {
printf("Warning - data mismatch - wrote "
"0x%0*x, read back 0x%0*x\n",
size == I2C_SMBUS_WORD_DATA ? 4 : 2, value,
size == I2C_SMBUS_WORD_DATA ? 4 : 2, res);
} else {
printf("Value 0x%0*x written, readback matched\n",
size == I2C_SMBUS_WORD_DATA ? 4 : 2, value);
}
exit(0);
}
int main(int argc, char *argv[])
{
char *end;
int i, j, res, i2cbus, address, size, file;
int bank = 0, bankreg = 0x4E, old_bank = 0;
char filename[20];
int block[256], s_length = 0;
int pec = 0, even = 0;
int flags = 0;
int force = 0, yes = 0, version = 0;
const char *range = NULL;
int first = 0x00, last = 0xff;
/* handle (optional) flags first */
while (1+flags < argc && argv[1+flags][0] == '-') {
switch (argv[1+flags][1]) {
case 'V': version = 1; break;
case 'f': force = 1; break;
case 'r': range = argv[1+(++flags)]; break;
case 'y': yes = 1; break;
default:
fprintf(stderr, "Error: Unsupported option "
"\"%s\"!\n", argv[1+flags]);
help();
exit(1);
}
flags++;
}
if (version) {
fprintf(stderr, "i2cdump version %s\n", VERSION);
exit(0);
}
if (argc < flags + 2) {
fprintf(stderr, "Error: No i2c-bus specified!\n");
help();
exit(1);
}
i2cbus = lookup_i2c_bus(argv[flags+1]);
if (i2cbus < 0) {
help();
exit(1);
}
if (argc < flags + 3) {
fprintf(stderr, "Error: No address specified!\n");
help();
exit(1);
}
address = parse_i2c_address(argv[flags+2]);
if (address < 0) {
help();
exit(1);
}
if (argc < flags + 4) {
fprintf(stderr, "No size specified (using byte-data access)\n");
size = I2C_SMBUS_BYTE_DATA;
} else if (!strncmp(argv[flags+3], "b", 1)) {
size = I2C_SMBUS_BYTE_DATA;
pec = argv[flags+3][1] == 'p';
} else if (!strncmp(argv[flags+3], "w", 1)) {
size = I2C_SMBUS_WORD_DATA;
pec = argv[flags+3][1] == 'p';
} else if (!strncmp(argv[flags+3], "W", 1)) {
size = I2C_SMBUS_WORD_DATA;
even = 1;
} else if (!strncmp(argv[flags+3], "s", 1)) {
size = I2C_SMBUS_BLOCK_DATA;
pec = argv[flags+3][1] == 'p';
} else if (!strncmp(argv[flags+3], "c", 1)) {
size = I2C_SMBUS_BYTE;
pec = argv[flags+3][1] == 'p';
} else if (!strcmp(argv[flags+3], "i"))
size = I2C_SMBUS_I2C_BLOCK_DATA;
else {
fprintf(stderr, "Error: Invalid mode!\n");
help();
exit(1);
}
if (argc > flags + 4) {
bank = strtol(argv[flags+4], &end, 0);
if (*end || size == I2C_SMBUS_I2C_BLOCK_DATA) {
fprintf(stderr, "Error: Invalid bank number!\n");
help();
exit(1);
}
if ((size == I2C_SMBUS_BYTE_DATA || size == I2C_SMBUS_WORD_DATA)
&& (bank < 0 || bank > 15)) {
fprintf(stderr, "Error: bank out of range!\n");
help();
exit(1);
}
if (size == I2C_SMBUS_BLOCK_DATA
&& (bank < 0 || bank > 0xff)) {
fprintf(stderr, "Error: block command out of range!\n");
help();
exit(1);
}
if (argc > flags + 5) {
bankreg = strtol(argv[flags+5], &end, 0);
if (*end || size == I2C_SMBUS_BLOCK_DATA) {
fprintf(stderr, "Error: Invalid bank register "
"number!\n");
help();
exit(1);
}
if (bankreg < 0 || bankreg > 0xff) {
fprintf(stderr, "Error: bank out of range "
"(0-0xff)!\n");
help();
exit(1);
}
}
}
/* Parse optional range string */
if (range) {
char *dash;
first = strtol(range, &dash, 0);
if (dash == range || *dash != '-'
|| first < 0 || first > 0xff) {
fprintf(stderr, "Error: Invalid range parameter!\n");
exit(1);
}
last = strtol(++dash, &end, 0);
if (end == dash || *end != '\0'
|| last < first || last > 0xff) {
fprintf(stderr, "Error: Invalid range parameter!\n");
exit(1);
}
/* Check mode constraints */
switch (size) {
case I2C_SMBUS_BYTE:
case I2C_SMBUS_BYTE_DATA:
break;
case I2C_SMBUS_WORD_DATA:
if (!even || (!(first%2) && last%2))
break;
/* Fall through */
default:
fprintf(stderr,
"Error: Range parameter not compatible with selected mode!\n");
exit(1);
}
}
file = open_i2c_dev(i2cbus, filename, sizeof(filename), 0);
if (file < 0
|| check_funcs(file, size, pec)
|| set_slave_addr(file, address, force))
exit(1);
if (pec) {
if (ioctl(file, I2C_PEC, 1) < 0) {
fprintf(stderr, "Error: Could not set PEC: %s\n",
strerror(errno));
exit(1);
}
}
if (!yes) {
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 ? "byte consecutive read" :
size == I2C_SMBUS_BYTE_DATA ? "byte" : "word");
if (pec)
fprintf(stderr, "PEC checking enabled.\n");
if (even)
fprintf(stderr, "Only probing even register "
"addresses.\n");
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);
}
if (range) {
fprintf(stderr,
"Probe range limited to 0x%02x-0x%02x.\n",
first, last);
}
fprintf(stderr, "Continue? [Y/n] ");
fflush(stderr);
if (!user_ack(1)) {
fprintf(stderr, "Aborting on user request.\n");
exit(0);
}
}
/* See Winbond w83781d data sheet for bank details */
if (bank && size != I2C_SMBUS_BLOCK_DATA) {
res = i2c_smbus_read_byte_data(file, bankreg);
if (res >= 0) {
old_bank = res;
res = i2c_smbus_write_byte_data(file, bankreg,
bank | (old_bank & 0xf0));
}
if (res < 0) {
fprintf(stderr, "Error: Bank switching failed\n");
exit(1);
}
}
/* handle all but word data */
if (size != I2C_SMBUS_WORD_DATA || even) {
/* do the block transaction */
if (size == I2C_SMBUS_BLOCK_DATA
|| size == I2C_SMBUS_I2C_BLOCK_DATA) {
unsigned char cblock[288];
if (size == I2C_SMBUS_BLOCK_DATA) {
res = i2c_smbus_read_block_data(file, bank,
cblock);
/* Remember returned block length for a nicer
display later */
s_length = res;
} else {
for (res = 0; res < 256; res += i) {
i = i2c_smbus_read_i2c_block_data(file,
res, 32, cblock + res);
if (i <= 0) {
res = i;
break;
}
}
}
if (res <= 0) {
fprintf(stderr, "Error: Block read failed, "
"return code %d\n", res);
exit(1);
}
if (res >= 256)
res = 256;
for (i = 0; i < res; i++)
block[i] = cblock[i];
if (size != I2C_SMBUS_BLOCK_DATA)
for (i = res; i < 256; i++)
block[i] = -1;
}
if (size == I2C_SMBUS_BYTE) {
res = i2c_smbus_write_byte(file, first);
if(res != 0) {
fprintf(stderr, "Error: Write start address "
"failed, return code %d\n", res);
exit(1);
}
}
printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f"
" 0123456789abcdef\n");
for (i = 0; i < 256; i+=16) {
if (size == I2C_SMBUS_BLOCK_DATA && i >= s_length)
break;
if (i/16 < first/16)
continue;
if (i/16 > last/16)
break;
printf("%02x: ", i);
for (j = 0; j < 16; j++) {
fflush(stdout);
/* Skip unwanted registers */
if (i+j < first || i+j > last) {
printf(" ");
if (size == I2C_SMBUS_WORD_DATA) {
printf(" ");
j++;
}
continue;
}
if (size == I2C_SMBUS_BYTE_DATA) {
block[i+j] = res =
i2c_smbus_read_byte_data(file, i+j);
} else if (size == I2C_SMBUS_WORD_DATA) {
res = i2c_smbus_read_word_data(file,
i+j);
if (res < 0) {
block[i+j] = res;
block[i+j+1] = res;
} else {
block[i+j] = res & 0xff;
block[i+j+1] = res >> 8;
}
} else if (size == I2C_SMBUS_BYTE) {
block[i+j] = res =
i2c_smbus_read_byte(file);
} else
res = block[i+j];
if (size == I2C_SMBUS_BLOCK_DATA
&& i+j >= s_length) {
printf(" ");
} else if (res < 0) {
printf("XX ");
if (size == I2C_SMBUS_WORD_DATA)
printf("XX ");
} else {
printf("%02x ", block[i+j]);
if (size == I2C_SMBUS_WORD_DATA)
printf("%02x ", block[i+j+1]);
}
if (size == I2C_SMBUS_WORD_DATA)
j++;
}
printf(" ");
for (j = 0; j < 16; j++) {
if (size == I2C_SMBUS_BLOCK_DATA
&& i+j >= s_length)
break;
/* Skip unwanted registers */
if (i+j < first || i+j > last) {
printf(" ");
continue;
}
res = block[i+j];
if (res < 0)
printf("X");
else
if ((res & 0xff) == 0x00
|| (res & 0xff) == 0xff)
printf(".");
else
if ((res & 0xff) < 32
|| (res & 0xff) >= 127)
printf("?");
else
printf("%c", res & 0xff);
}
printf("\n");
}
int main(int argc, char *argv[])
{
char *end;
int i, j, res, i2cbus, address, size, file;
int bank = 0, bankreg = 0x4E, old_bank = 0;
char filename[20];
unsigned long funcs;
int block[256], s_length = 0;
int pec = 0, even = 0;
int flags = 0;
int force = 0, yes = 0, version = 0;
/* handle (optional) flags first */
while (1+flags < argc && argv[1+flags][0] == '-') {
switch (argv[1+flags][1]) {
case 'V': version = 1; break;
case 'f': force = 1; break;
case 'y': yes = 1; break;
default:
fprintf(stderr, "Warning: Unsupported flag "
"\"-%c\"!\n", argv[1+flags][1]);
help();
exit(1);
}
flags++;
}
if (version) {
fprintf(stderr, "i2cdump version %s\n", VERSION);
exit(0);
}
if (argc < flags + 2) {
fprintf(stderr, "Error: No i2c-bus specified!\n");
help();
exit(1);
}
i2cbus = strtol(argv[flags+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();
exit(1);
}
if (argc < flags + 3) {
fprintf(stderr, "Error: No address specified!\n");
help();
exit(1);
}
address = strtol(argv[flags+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();
exit(1);
}
if (argc < flags + 4) {
fprintf(stderr, "No size specified (using byte-data access)\n");
size = I2C_SMBUS_BYTE_DATA;
} else if (!strncmp(argv[flags+3], "b", 1)) {
size = I2C_SMBUS_BYTE_DATA;
pec = argv[flags+3][1] == 'p';
} else if (!strncmp(argv[flags+3], "w", 1)) {
size = I2C_SMBUS_WORD_DATA;
pec = argv[flags+3][1] == 'p';
} else if (!strncmp(argv[flags+3], "W", 1)) {
size = I2C_SMBUS_WORD_DATA;
even = 1;
} else if (!strncmp(argv[flags+3], "s", 1)) {
size = I2C_SMBUS_BLOCK_DATA;
pec = argv[flags+3][1] == 'p';
} else if (!strncmp(argv[flags+3], "c", 1)) {
size = I2C_SMBUS_BYTE;
pec = argv[flags+3][1] == 'p';
} else if (!strcmp(argv[flags+3], "i"))
size = I2C_SMBUS_I2C_BLOCK_DATA;
else {
fprintf(stderr, "Error: Invalid mode!\n");
help();
exit(1);
}
if (argc > flags + 4) {
bank = strtol(argv[flags+4], &end, 0);
if (*end || size == I2C_SMBUS_I2C_BLOCK_DATA) {
fprintf(stderr, "Error: Invalid bank number!\n");
help();
exit(1);
}
if ((size == I2C_SMBUS_BYTE_DATA || size == I2C_SMBUS_WORD_DATA)
&& (bank < 0 || bank > 15)) {
fprintf(stderr, "Error: bank out of range!\n");
help();
exit(1);
}
if (size == I2C_SMBUS_BLOCK_DATA
&& (bank < 0 || bank > 0xff)) {
fprintf(stderr, "Error: block command out of range!\n");
help();
exit(1);
}
if (argc > flags + 5) {
bankreg = strtol(argv[flags+5], &end, 0);
if (*end || size == I2C_SMBUS_BLOCK_DATA) {
fprintf(stderr, "Error: Invalid bank register "
"number!\n");
help();
exit(1);
}
if (bankreg < 0 || bankreg > 0xff) {
fprintf(stderr, "Error: bank out of range "
"(0-0xff)!\n");
help();
exit(1);
}
}
}
file = open_i2c_dev(i2cbus, filename, 0);
if (file < 0) {
exit(1);
}
/* check adapter functionality */
if (ioctl(file, I2C_FUNCS, &funcs) < 0) {
fprintf(stderr, "Error: Could not get the adapter "
"functionality matrix: %s\n", strerror(errno));
exit(1);
}
switch(size) {
case I2C_SMBUS_BYTE:
if (!((funcs & I2C_FUNC_SMBUS_BYTE) == I2C_FUNC_SMBUS_BYTE)) {
fprintf(stderr, "Error: Adapter for i2c bus %d does "
"not have byte capability\n", i2cbus);
exit(1);
}
break;
case I2C_SMBUS_BYTE_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d does "
"not have byte read capability\n", i2cbus);
exit(1);
}
break;
case I2C_SMBUS_WORD_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_WORD_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d does "
"not have word read capability\n", i2cbus);
exit(1);
}
break;
case I2C_SMBUS_BLOCK_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_BLOCK_DATA)) {
fprintf(stderr, "Error: Adapter for i2c bus %d does "
"not have smbus block read capability\n",
i2cbus);
exit(1);
}
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
fprintf(stderr, "Error: Adapter for i2c bus %d does "
"not have i2c block read capability\n",
i2cbus);
exit(1);
}
break;
}
if (set_slave_addr(file, address, force) < 0)
exit(1);
if (pec) {
if (ioctl(file, I2C_PEC, 1) < 0) {
fprintf(stderr, "Error: Could not set PEC: %s\n",
strerror(errno));
exit(1);
}
if (!(funcs & (I2C_FUNC_SMBUS_PEC | I2C_FUNC_I2C))) {
fprintf(stderr, "Warning: Adapter for i2c bus %d does "
"not seem to actually support PEC\n", i2cbus);
}
}
if (!yes) {
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 ? "byte consecutive read" :
size == I2C_SMBUS_BYTE_DATA ? "byte" : "word");
if (pec)
fprintf(stderr, "PEC checking enabled.\n");
if (even)
fprintf(stderr, "Only probing even register "
"addresses.\n");
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, "Continue? [Y/n] ");
fflush(stderr);
if (!user_ack(1)) {
fprintf(stderr, "Aborting on user request.\n");
exit(0);
}
}
/* See Winbond w83781d data sheet for bank details */
if (bank && size != I2C_SMBUS_BLOCK_DATA) {
res = i2c_smbus_read_byte_data(file, bankreg);
if (res >= 0) {
old_bank = res;
res = i2c_smbus_write_byte_data(file, bankreg,
bank | (old_bank & 0xf0));
}
if (res < 0) {
fprintf(stderr, "Error: Bank switching failed\n");
exit(1);
}
}
/* handle all but word data */
if (size != I2C_SMBUS_WORD_DATA || even) {
/* do the block transaction */
if (size == I2C_SMBUS_BLOCK_DATA
|| size == I2C_SMBUS_I2C_BLOCK_DATA) {
unsigned char cblock[288];
if (size == I2C_SMBUS_BLOCK_DATA) {
res = i2c_smbus_read_block_data(file, bank,
cblock);
/* Remember returned block length for a nicer
display later */
s_length = res;
} else {
for (res = 0; res < 256; res += i) {
i = i2c_smbus_read_i2c_block_data(file,
res, 32, cblock + res);
if (i <= 0)
break;
}
}
if (res <= 0) {
fprintf(stderr, "Error: Block read failed, "
"return code %d\n", res);
exit(1);
}
if (res >= 256)
res = 256;
for (i = 0; i < res; i++)
block[i] = cblock[i];
if (size != I2C_SMBUS_BLOCK_DATA)
for (i = res; i < 256; i++)
block[i] = -1;
}
if (size == I2C_SMBUS_BYTE) {
res = i2c_smbus_write_byte(file, 0);
if(res != 0) {
fprintf(stderr, "Error: Write start address "
"failed, return code %d\n", res);
exit(1);
}
}
printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f"
" 0123456789abcdef\n");
for (i = 0; i < 256; i+=16) {
if (size == I2C_SMBUS_BLOCK_DATA && i >= s_length)
break;
printf("%02x: ", i);
for (j = 0; j < 16; j++) {
fflush(stdout);
if (size == I2C_SMBUS_BYTE_DATA) {
block[i+j] = res =
i2c_smbus_read_byte_data(file, i+j);
} else if (size == I2C_SMBUS_WORD_DATA) {
res = i2c_smbus_read_word_data(file,
i+j);
if (res < 0) {
block[i+j] = res;
block[i+j+1] = res;
} else {
block[i+j] = res & 0xff;
block[i+j+1] = res >> 8;
}
} else if (size == I2C_SMBUS_BYTE) {
block[i+j] = res =
i2c_smbus_read_byte(file);
} else
res = block[i+j];
if (size == I2C_SMBUS_BLOCK_DATA
&& i+j >= s_length) {
printf(" ");
} else if (res < 0) {
printf("XX ");
if (size == I2C_SMBUS_WORD_DATA)
printf("XX ");
} else {
printf("%02x ", block[i+j]);
if (size == I2C_SMBUS_WORD_DATA)
printf("%02x ", block[i+j+1]);
}
if (size == I2C_SMBUS_WORD_DATA)
j++;
}
printf(" ");
for (j = 0; j < 16; j++) {
if (size == I2C_SMBUS_BLOCK_DATA
&& i+j >= s_length)
break;
res = block[i+j];
if (res < 0)
printf("X");
else
if ((res & 0xff) == 0x00
|| (res & 0xff) == 0xff)
printf(".");
else
if ((res & 0xff) < 32
|| (res & 0xff) >= 127)
printf("?");
else
printf("%c", res & 0xff);
}
printf("\n");
}
