busybox/miscutils/i2c_tools.c

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/* vi: set sw=4 ts=4: */
/*
* Minimal i2c-tools implementation for busybox.
* Parts of code ported from i2c-tools:
* http://www.lm-sensors.org/wiki/I2CTools.
*
* Copyright (C) 2014 by Bartosz Golaszewski <bartekgola@gmail.com>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config I2CGET
//config: bool "i2cget (5.5 kb)"
//config: default y
//config: help
//config: Read from I2C/SMBus chip registers.
//config:
//config:config I2CSET
//config: bool "i2cset (6.7 kb)"
//config: default y
//config: help
//config: Set I2C registers.
//config:
//config:config I2CDUMP
//config: bool "i2cdump (7.1 kb)"
//config: default y
//config: help
//config: Examine I2C registers.
//config:
//config:config I2CDETECT
//config: bool "i2cdetect (7.1 kb)"
//config: default y
//config: help
//config: Detect I2C chips.
//config:
//config:config I2CTRANSFER
//config: bool "i2ctransfer (4.0 kb)"
//config: default y
//config: help
//config: Send user-defined I2C messages in one transfer.
//config:
//applet:IF_I2CGET(APPLET(i2cget, BB_DIR_USR_SBIN, BB_SUID_DROP))
//applet:IF_I2CSET(APPLET(i2cset, BB_DIR_USR_SBIN, BB_SUID_DROP))
//applet:IF_I2CDUMP(APPLET(i2cdump, BB_DIR_USR_SBIN, BB_SUID_DROP))
//applet:IF_I2CDETECT(APPLET(i2cdetect, BB_DIR_USR_SBIN, BB_SUID_DROP))
//applet:IF_I2CTRANSFER(APPLET(i2ctransfer, BB_DIR_USR_SBIN, BB_SUID_DROP))
/* not NOEXEC: if hw operation stalls, use less memory in "hung" process */
//kbuild:lib-$(CONFIG_I2CGET) += i2c_tools.o
//kbuild:lib-$(CONFIG_I2CSET) += i2c_tools.o
//kbuild:lib-$(CONFIG_I2CDUMP) += i2c_tools.o
//kbuild:lib-$(CONFIG_I2CDETECT) += i2c_tools.o
//kbuild:lib-$(CONFIG_I2CTRANSFER) += i2c_tools.o
/*
* Unsupported stuff:
*
* - upstream i2c-tools can also look-up i2c busses by name, we only accept
* numbers,
* - bank and bankreg parameters for i2cdump are not supported because of
* their limited usefulness (see i2cdump manual entry for more info),
* - i2cdetect doesn't look for bus info in /proc as it does in upstream, but
* it shouldn't be a problem in modern kernels.
*/
#include "libbb.h"
#include <linux/i2c.h>
#define I2CDUMP_NUM_REGS 256
#define I2CDETECT_MODE_AUTO 0
#define I2CDETECT_MODE_QUICK 1
#define I2CDETECT_MODE_READ 2
/* linux/i2c-dev.h from i2c-tools overwrites the one from linux uapi
* and defines symbols already defined by linux/i2c.h.
* Also, it defines a bunch of static inlines which we would rather NOT
* inline. What a mess.
* We need only these definitions from linux/i2c-dev.h:
*/
#define I2C_SLAVE 0x0703
#define I2C_SLAVE_FORCE 0x0706
#define I2C_FUNCS 0x0705
#define I2C_PEC 0x0708
#define I2C_SMBUS 0x0720
#define I2C_RDWR 0x0707
#define I2C_RDWR_IOCTL_MAX_MSGS 42
#define I2C_RDWR_IOCTL_MAX_MSGS_STR "42"
struct i2c_smbus_ioctl_data {
__u8 read_write;
__u8 command;
__u32 size;
union i2c_smbus_data *data;
};
struct i2c_rdwr_ioctl_data {
struct i2c_msg *msgs; /* pointers to i2c_msgs */
__u32 nmsgs; /* number of i2c_msgs */
};
/* end linux/i2c-dev.h */
/*
* This is needed for ioctl_or_perror_and_die() since it only accepts pointers.
*/
static ALWAYS_INLINE void *itoptr(int i)
{
return (void*)(intptr_t)i;
}
static int32_t i2c_smbus_access(int fd, char read_write, uint8_t cmd,
int size, union i2c_smbus_data *data)
{
struct i2c_smbus_ioctl_data args;
args.read_write = read_write;
args.command = cmd;
args.size = size;
args.data = data;
return ioctl(fd, I2C_SMBUS, &args);
}
static int32_t i2c_smbus_read_byte(int fd)
{
union i2c_smbus_data data;
int err;
err = i2c_smbus_access(fd, I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &data);
if (err < 0)
return err;
return data.byte;
}
#if ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP
static int32_t i2c_smbus_write_byte(int fd, uint8_t val)
{
return i2c_smbus_access(fd, I2C_SMBUS_WRITE,
val, I2C_SMBUS_BYTE, NULL);
}
static int32_t i2c_smbus_read_byte_data(int fd, uint8_t cmd)
{
union i2c_smbus_data data;
int err;
err = i2c_smbus_access(fd, I2C_SMBUS_READ, cmd,
I2C_SMBUS_BYTE_DATA, &data);
if (err < 0)
return err;
return data.byte;
}
static int32_t i2c_smbus_read_word_data(int fd, uint8_t cmd)
{
union i2c_smbus_data data;
int err;
err = i2c_smbus_access(fd, I2C_SMBUS_READ, cmd,
I2C_SMBUS_WORD_DATA, &data);
if (err < 0)
return err;
return data.word;
}
#endif /* ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP */
#if ENABLE_I2CSET
static int32_t i2c_smbus_write_byte_data(int file,
uint8_t cmd, uint8_t value)
{
union i2c_smbus_data data;
data.byte = value;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, cmd,
I2C_SMBUS_BYTE_DATA, &data);
}
static int32_t i2c_smbus_write_word_data(int file, uint8_t cmd, uint16_t value)
{
union i2c_smbus_data data;
data.word = value;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, cmd,
I2C_SMBUS_WORD_DATA, &data);
}
static int32_t i2c_smbus_write_block_data(int file, uint8_t cmd,
uint8_t length, const uint8_t *values)
{
union i2c_smbus_data data;
if (length > I2C_SMBUS_BLOCK_MAX)
length = I2C_SMBUS_BLOCK_MAX;
memcpy(data.block+1, values, length);
data.block[0] = length;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, cmd,
I2C_SMBUS_BLOCK_DATA, &data);
}
static int32_t i2c_smbus_write_i2c_block_data(int file, uint8_t cmd,
uint8_t length, const uint8_t *values)
{
union i2c_smbus_data data;
if (length > I2C_SMBUS_BLOCK_MAX)
length = I2C_SMBUS_BLOCK_MAX;
memcpy(data.block+1, values, length);
data.block[0] = length;
return i2c_smbus_access(file, I2C_SMBUS_WRITE, cmd,
I2C_SMBUS_I2C_BLOCK_BROKEN, &data);
}
#endif /* ENABLE_I2CSET */
#if ENABLE_I2CDUMP
/*
* Returns the number of bytes read, vals must hold at
* least I2C_SMBUS_BLOCK_MAX bytes.
*/
static int32_t i2c_smbus_read_block_data(int fd, uint8_t cmd, uint8_t *vals)
{
union i2c_smbus_data data;
int i, err;
err = i2c_smbus_access(fd, I2C_SMBUS_READ, cmd,
I2C_SMBUS_BLOCK_DATA, &data);
if (err < 0)
return err;
for (i = 1; i <= data.block[0]; i++)
*vals++ = data.block[i];
return data.block[0];
}
static int32_t i2c_smbus_read_i2c_block_data(int fd, uint8_t cmd,
uint8_t len, uint8_t *vals)
{
union i2c_smbus_data data;
int i, err;
if (len > I2C_SMBUS_BLOCK_MAX)
len = I2C_SMBUS_BLOCK_MAX;
data.block[0] = len;
err = i2c_smbus_access(fd, I2C_SMBUS_READ, cmd,
len == 32 ? I2C_SMBUS_I2C_BLOCK_BROKEN :
I2C_SMBUS_I2C_BLOCK_DATA, &data);
if (err < 0)
return err;
for (i = 1; i <= data.block[0]; i++)
*vals++ = data.block[i];
return data.block[0];
}
#endif /* ENABLE_I2CDUMP */
#if ENABLE_I2CDETECT
static int32_t i2c_smbus_write_quick(int fd, uint8_t val)
{
return i2c_smbus_access(fd, val, 0, I2C_SMBUS_QUICK, NULL);
}
#endif /* ENABLE_I2CDETECT */
static int i2c_bus_lookup(const char *bus_str)
{
return xstrtou_range(bus_str, 10, 0, 0xfffff);
}
#if ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP
static int i2c_parse_bus_addr(const char *addr_str)
{
/* Slave address must be in range 0x03 - 0x77. */
return xstrtou_range(addr_str, 16, 0x03, 0x77);
}
static void i2c_set_pec(int fd, int pec)
{
ioctl_or_perror_and_die(fd, I2C_PEC,
itoptr(pec ? 1 : 0),
"can't set PEC");
}
#endif
#if ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP || ENABLE_I2CTRANSFER
static void i2c_set_slave_addr(int fd, int addr, int force)
{
ioctl_or_perror_and_die(fd, force ? I2C_SLAVE_FORCE : I2C_SLAVE,
itoptr(addr),
"can't set address to 0x%02x", addr);
}
#endif
#if ENABLE_I2CGET || ENABLE_I2CSET
static int i2c_parse_data_addr(const char *data_addr)
{
/* Data address must be an 8 bit integer. */
return xstrtou_range(data_addr, 16, 0, 0xff);
}
#endif /* ENABLE_I2CGET || ENABLE_I2CSET */
/*
* Opens the device file associated with given i2c bus.
*
* Upstream i2c-tools also support opening devices by i2c bus name
* but we drop it here for size reduction.
*/
static int i2c_dev_open(int i2cbus)
{
char filename[sizeof("/dev/i2c-%d") + sizeof(int)*3];
int fd;
sprintf(filename, "/dev/i2c-%d", i2cbus);
fd = open(filename, O_RDWR);
if (fd < 0) {
if (errno == ENOENT) {
filename[8] = '/'; /* change to "/dev/i2c/%d" */
fd = xopen(filename, O_RDWR);
} else {
bb_perror_msg_and_die("can't open '%s'", filename);
}
}
return fd;
}
/* Size reducing helpers for xxx_check_funcs(). */
static void get_funcs_matrix(int fd, unsigned long *funcs)
{
ioctl_or_perror_and_die(fd, I2C_FUNCS, funcs,
"can't get adapter functionality matrix");
}
#if ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP
static void check_funcs_test_end(int funcs, int pec, const char *err)
{
if (pec && !(funcs & (I2C_FUNC_SMBUS_PEC | I2C_FUNC_I2C)))
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg("warning: adapter does not support PEC");
if (err)
bb_error_msg_and_die(
"adapter has no %s capability", err);
}
#endif /* ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP */
/*
* The below functions emit an error message and exit if the adapter doesn't
* support desired functionalities.
*/
#if ENABLE_I2CGET || ENABLE_I2CDUMP
static void check_read_funcs(int fd, int mode, int data_addr, int pec)
{
unsigned long funcs;
const char *err = NULL;
get_funcs_matrix(fd, &funcs);
switch (mode) {
case I2C_SMBUS_BYTE:
if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
err = "SMBus receive byte";
break;
}
if (data_addr >= 0 && !(funcs & I2C_FUNC_SMBUS_WRITE_BYTE))
err = "SMBus send byte";
break;
case I2C_SMBUS_BYTE_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE_DATA))
err = "SMBus read byte";
break;
case I2C_SMBUS_WORD_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_WORD_DATA))
err = "SMBus read word";
break;
#if ENABLE_I2CDUMP
case I2C_SMBUS_BLOCK_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_BLOCK_DATA))
err = "SMBus block read";
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
if (!(funcs & I2C_FUNC_SMBUS_READ_I2C_BLOCK))
err = "I2C block read";
break;
#endif /* ENABLE_I2CDUMP */
default:
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("internal error");
}
check_funcs_test_end(funcs, pec, err);
}
#endif /* ENABLE_I2CGET || ENABLE_I2CDUMP */
#if ENABLE_I2CSET
static void check_write_funcs(int fd, int mode, int pec)
{
unsigned long funcs;
const char *err = NULL;
get_funcs_matrix(fd, &funcs);
switch (mode) {
case I2C_SMBUS_BYTE:
if (!(funcs & I2C_FUNC_SMBUS_WRITE_BYTE))
err = "SMBus send byte";
break;
case I2C_SMBUS_BYTE_DATA:
if (!(funcs & I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
err = "SMBus write byte";
break;
case I2C_SMBUS_WORD_DATA:
if (!(funcs & I2C_FUNC_SMBUS_WRITE_WORD_DATA))
err = "SMBus write word";
break;
case I2C_SMBUS_BLOCK_DATA:
if (!(funcs & I2C_FUNC_SMBUS_WRITE_BLOCK_DATA))
err = "SMBus block write";
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
if (!(funcs & I2C_FUNC_SMBUS_WRITE_I2C_BLOCK))
err = "I2C block write";
break;
}
check_funcs_test_end(funcs, pec, err);
}
#endif /* ENABLE_I2CSET */
static void confirm_or_abort(void)
{
fprintf(stderr, "Continue? [y/N] ");
if (!bb_ask_y_confirmation())
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("aborting");
}
/*
* Return only if user confirms the action, abort otherwise.
*
* The messages displayed here are much less elaborate than their i2c-tools
* counterparts - this is done for size reduction.
*/
static void confirm_action(int bus_addr, int mode, int data_addr, int pec)
{
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg("WARNING! This program can confuse your I2C bus");
/* Don't let the user break his/her EEPROMs */
if (bus_addr >= 0x50 && bus_addr <= 0x57 && pec) {
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("this is I2C not smbus - using PEC on I2C "
"devices may result in data loss, aborting");
}
if (mode == I2C_SMBUS_BYTE && data_addr >= 0 && pec)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg("WARNING! May interpret a write byte command "
"with PEC as a write byte data command");
if (pec)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg("PEC checking enabled");
confirm_or_abort();
}
#if ENABLE_I2CGET
//usage:#define i2cget_trivial_usage
//usage: "[-fy] BUS CHIP-ADDRESS [DATA-ADDRESS [MODE]]"
//usage:#define i2cget_full_usage "\n\n"
//usage: "Read from I2C/SMBus chip registers"
//usage: "\n"
//usage: "\n I2CBUS I2C bus number"
//usage: "\n ADDRESS 0x03-0x77"
//usage: "\nMODE is:"
//usage: "\n b Read byte data (default)"
//usage: "\n w Read word data"
//usage: "\n c Write byte/read byte"
//usage: "\n Append p for SMBus PEC"
//usage: "\n"
//usage: "\n -f Force access"
//usage: "\n -y Disable interactive mode"
int i2cget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int i2cget_main(int argc UNUSED_PARAM, char **argv)
{
const unsigned opt_f = (1 << 0), opt_y = (1 << 1);
int bus_num, bus_addr, data_addr = -1, status;
int mode = I2C_SMBUS_BYTE, pec = 0, fd;
unsigned opts;
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
opts = getopt32(argv, "^" "fy" "\0" "-2:?4"/*from 2 to 4 args*/);
argv += optind;
bus_num = i2c_bus_lookup(argv[0]);
bus_addr = i2c_parse_bus_addr(argv[1]);
if (argv[2]) {
data_addr = i2c_parse_data_addr(argv[2]);
mode = I2C_SMBUS_BYTE_DATA;
if (argv[3]) {
switch (argv[3][0]) {
case 'b': /* Already set */ break;
case 'w': mode = I2C_SMBUS_WORD_DATA; break;
case 'c': mode = I2C_SMBUS_BYTE; break;
default:
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg("invalid mode");
bb_show_usage();
}
pec = argv[3][1] == 'p';
}
}
fd = i2c_dev_open(bus_num);
check_read_funcs(fd, mode, data_addr, pec);
i2c_set_slave_addr(fd, bus_addr, opts & opt_f);
if (!(opts & opt_y))
confirm_action(bus_addr, mode, data_addr, pec);
if (pec)
i2c_set_pec(fd, 1);
switch (mode) {
case I2C_SMBUS_BYTE:
if (data_addr >= 0) {
status = i2c_smbus_write_byte(fd, data_addr);
if (status < 0)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg("warning - write failed");
}
status = i2c_smbus_read_byte(fd);
break;
case I2C_SMBUS_WORD_DATA:
status = i2c_smbus_read_word_data(fd, data_addr);
break;
default: /* I2C_SMBUS_BYTE_DATA */
status = i2c_smbus_read_byte_data(fd, data_addr);
}
close(fd);
if (status < 0)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg_and_die("read failed");
printf("0x%0*x\n", mode == I2C_SMBUS_WORD_DATA ? 4 : 2, status);
return 0;
}
#endif /* ENABLE_I2CGET */
#if ENABLE_I2CSET
//usage:#define i2cset_trivial_usage
//usage: "[-fy] [-m MASK] BUS CHIP-ADDRESS DATA-ADDRESS [VALUE] ... [MODE]"
//usage:#define i2cset_full_usage "\n\n"
//usage: "Set I2C registers"
//usage: "\n"
//usage: "\n I2CBUS I2C bus number"
//usage: "\n ADDRESS 0x03-0x77"
//usage: "\nMODE is:"
//usage: "\n c Byte, no value"
//usage: "\n b Byte data (default)"
//usage: "\n w Word data"
//usage: "\n i I2C block data"
//usage: "\n s SMBus block data"
//usage: "\n Append p for SMBus PEC"
//usage: "\n"
//usage: "\n -f Force access"
//usage: "\n -y Disable interactive mode"
//usage: "\n -r Read back and compare the result"
//usage: "\n -m MASK Mask specifying which bits to write"
int i2cset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int i2cset_main(int argc, char **argv)
{
const unsigned opt_f = (1 << 0), opt_y = (1 << 1),
opt_m = (1 << 2), opt_r = (1 << 3);
int bus_num, bus_addr, data_addr, mode = I2C_SMBUS_BYTE, pec = 0;
int val, blen, mask, fd, status;
unsigned char block[I2C_SMBUS_BLOCK_MAX];
char *opt_m_arg = NULL;
unsigned opts;
opts = getopt32(argv, "^"
"fym:r"
"\0" "-3", /* minimum 3 args */
&opt_m_arg
);
argv += optind;
argc -= optind;
argc--; /* now argv[argc] is last arg */
bus_num = i2c_bus_lookup(argv[0]);
bus_addr = i2c_parse_bus_addr(argv[1]);
data_addr = i2c_parse_data_addr(argv[2]);
if (argv[3]) {
if (!argv[4] && argv[3][0] != 'c') {
mode = I2C_SMBUS_BYTE_DATA; /* Implicit b */
} else {
switch (argv[argc][0]) {
case 'c': /* Already set */
break;
case 'b': mode = I2C_SMBUS_BYTE_DATA;
break;
case 'w': mode = I2C_SMBUS_WORD_DATA;
break;
case 's': mode = I2C_SMBUS_BLOCK_DATA;
break;
case 'i': mode = I2C_SMBUS_I2C_BLOCK_DATA;
break;
default:
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg("invalid mode");
bb_show_usage();
}
pec = (argv[argc][1] == 'p');
if (mode == I2C_SMBUS_BLOCK_DATA
|| mode == I2C_SMBUS_I2C_BLOCK_DATA
) {
if (pec && mode == I2C_SMBUS_I2C_BLOCK_DATA)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die(
"PEC not supported for I2C "
"block writes");
if (opts & opt_m)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die(
"mask not supported for block "
"writes");
}
}
}
/* Prepare the value(s) to be written according to current mode. */
mask = 0;
blen = 0;
switch (mode) {
case I2C_SMBUS_BYTE_DATA:
val = xstrtou_range(argv[3], 0, 0, 0xff);
break;
case I2C_SMBUS_WORD_DATA:
val = xstrtou_range(argv[3], 0, 0, 0xffff);
break;
case I2C_SMBUS_BLOCK_DATA:
case I2C_SMBUS_I2C_BLOCK_DATA:
for (blen = 3; blen < argc; blen++)
block[blen - 3] = xstrtou_range(argv[blen], 0, 0, 0xff);
blen -= 3;
val = -1;
break;
default:
val = -1;
break;
}
if (opts & opt_m) {
mask = xstrtou_range(opt_m_arg, 0, 0,
(mode == I2C_SMBUS_BYTE ||
mode == I2C_SMBUS_BYTE_DATA) ? 0xff : 0xffff);
}
fd = i2c_dev_open(bus_num);
check_write_funcs(fd, mode, pec);
i2c_set_slave_addr(fd, bus_addr, opts & opt_f);
if (!(opts & opt_y))
confirm_action(bus_addr, mode, data_addr, pec);
/*
* If we're using mask - read the current value here and adjust the
* value to be written.
*/
if (opts & opt_m) {
int tmpval;
switch (mode) {
case I2C_SMBUS_BYTE:
tmpval = i2c_smbus_read_byte(fd);
break;
case I2C_SMBUS_WORD_DATA:
tmpval = i2c_smbus_read_word_data(fd, data_addr);
break;
default:
tmpval = i2c_smbus_read_byte_data(fd, data_addr);
}
if (tmpval < 0)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg_and_die("can't read old value");
val = (val & mask) | (tmpval & ~mask);
if (!(opts & opt_y)) {
bb_error_msg("old value 0x%0*x, write mask "
"0x%0*x, will write 0x%0*x to register "
"0x%02x",
mode == I2C_SMBUS_WORD_DATA ? 4 : 2, tmpval,
mode == I2C_SMBUS_WORD_DATA ? 4 : 2, mask,
mode == I2C_SMBUS_WORD_DATA ? 4 : 2, val,
data_addr);
confirm_or_abort();
}
}
if (pec)
i2c_set_pec(fd, 1);
switch (mode) {
case I2C_SMBUS_BYTE:
status = i2c_smbus_write_byte(fd, data_addr);
break;
case I2C_SMBUS_WORD_DATA:
status = i2c_smbus_write_word_data(fd, data_addr, val);
break;
case I2C_SMBUS_BLOCK_DATA:
status = i2c_smbus_write_block_data(fd, data_addr,
blen, block);
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
status = i2c_smbus_write_i2c_block_data(fd, data_addr,
blen, block);
break;
default: /* I2C_SMBUS_BYTE_DATA */
status = i2c_smbus_write_byte_data(fd, data_addr, val);
break;
}
if (status < 0)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg_and_die("write failed");
if (pec)
i2c_set_pec(fd, 0); /* Clear PEC. */
/* No readback required - we're done. */
if (!(opts & opt_r))
return 0;
switch (mode) {
case I2C_SMBUS_BYTE:
status = i2c_smbus_read_byte(fd);
val = data_addr;
break;
case I2C_SMBUS_WORD_DATA:
status = i2c_smbus_read_word_data(fd, data_addr);
break;
default: /* I2C_SMBUS_BYTE_DATA */
status = i2c_smbus_read_byte_data(fd, data_addr);
}
if (status < 0) {
puts("Warning - readback failed");
} else
if (status != val) {
printf("Warning - data mismatch - wrote "
"0x%0*x, read back 0x%0*x\n",
mode == I2C_SMBUS_WORD_DATA ? 4 : 2, val,
mode == I2C_SMBUS_WORD_DATA ? 4 : 2, status);
} else {
printf("Value 0x%0*x written, readback matched\n",
mode == I2C_SMBUS_WORD_DATA ? 4 : 2, val);
}
return 0;
}
#endif /* ENABLE_I2CSET */
#if ENABLE_I2CDUMP
static int read_block_data(int buf_fd, int mode, int *block)
{
uint8_t cblock[I2C_SMBUS_BLOCK_MAX + I2CDUMP_NUM_REGS];
int res, blen = 0, tmp, i;
if (mode == I2C_SMBUS_BLOCK_DATA) {
blen = i2c_smbus_read_block_data(buf_fd, 0, cblock);
if (blen <= 0)
goto fail;
} else {
for (res = 0; res < I2CDUMP_NUM_REGS; res += tmp) {
tmp = i2c_smbus_read_i2c_block_data(
buf_fd, res, I2C_SMBUS_BLOCK_MAX,
cblock + res);
if (tmp <= 0) {
blen = tmp;
goto fail;
}
}
if (res >= I2CDUMP_NUM_REGS)
res = I2CDUMP_NUM_REGS;
for (i = 0; i < res; i++)
block[i] = cblock[i];
if (mode != I2C_SMBUS_BLOCK_DATA)
for (i = res; i < I2CDUMP_NUM_REGS; i++)
block[i] = -1;
}
return blen;
fail:
bb_error_msg_and_die("block read failed: %d", blen);
}
/* Dump all but word data. */
static void dump_data(int bus_fd, int mode, unsigned first,
unsigned last, int *block, int blen)
{
int i, j, res;
puts(" 0 1 2 3 4 5 6 7 8 9 a b c d e f"
" 0123456789abcdef");
for (i = 0; i < I2CDUMP_NUM_REGS; i += 0x10) {
if (mode == I2C_SMBUS_BLOCK_DATA && i >= blen)
break;
if (i/16 < first/16)
continue;
if (i/16 > last/16)
break;
printf("%02x: ", i);
for (j = 0; j < 16; j++) {
fflush_all();
/* Skip unwanted registers */
if (i+j < first || i+j > last) {
printf(" ");
if (mode == I2C_SMBUS_WORD_DATA) {
printf(" ");
j++;
}
continue;
}
switch (mode) {
case I2C_SMBUS_BYTE_DATA:
res = i2c_smbus_read_byte_data(bus_fd, i+j);
block[i+j] = res;
break;
case I2C_SMBUS_WORD_DATA:
res = i2c_smbus_read_word_data(bus_fd, 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;
}
break;
case I2C_SMBUS_BYTE:
res = i2c_smbus_read_byte(bus_fd);
block[i+j] = res;
break;
default:
res = block[i+j];
}
if (mode == I2C_SMBUS_BLOCK_DATA &&
i+j >= blen) {
printf(" ");
} else if (res < 0) {
printf("XX ");
if (mode == I2C_SMBUS_WORD_DATA)
printf("XX ");
} else {
printf("%02x ", block[i+j]);
if (mode == I2C_SMBUS_WORD_DATA)
printf("%02x ", block[i+j+1]);
}
if (mode == I2C_SMBUS_WORD_DATA)
j++;
}
printf(" ");
for (j = 0; j < 16; j++) {
if (mode == I2C_SMBUS_BLOCK_DATA && i+j >= blen)
break;
/* Skip unwanted registers */
if (i+j < first || i+j > last) {
bb_putchar(' ');
continue;
}
res = block[i+j];
if (res < 0) {
bb_putchar('X');
} else if (res == 0x00 || res == 0xff) {
bb_putchar('.');
} else if (res < 32 || res >= 127) {
bb_putchar('?');
} else {
bb_putchar(res);
}
}
bb_putchar('\n');
}
}
static void dump_word_data(int bus_fd, unsigned first, unsigned last)
{
int i, j, rv;
/* Word data. */
puts(" 0,8 1,9 2,a 3,b 4,c 5,d 6,e 7,f");
for (i = 0; i < 256; i += 8) {
if (i/8 < first/8)
continue;
if (i/8 > last/8)
break;
printf("%02x: ", i);
for (j = 0; j < 8; j++) {
/* Skip unwanted registers. */
if (i+j < first || i+j > last) {
printf(" ");
continue;
}
rv = i2c_smbus_read_word_data(bus_fd, i+j);
if (rv < 0)
printf("XXXX ");
else
printf("%04x ", rv & 0xffff);
}
bb_putchar('\n');
}
}
//usage:#define i2cdump_trivial_usage
//usage: "[-fy] [-r FIRST-LAST] BUS ADDR [MODE]"
//usage:#define i2cdump_full_usage "\n\n"
//usage: "Examine I2C registers"
//usage: "\n"
//usage: "\n I2CBUS I2C bus number"
//usage: "\n ADDRESS 0x03-0x77"
//usage: "\nMODE is:"
//usage: "\n b Byte (default)"
//usage: "\n w Word"
//usage: "\n W Word on even register addresses"
//usage: "\n i I2C block"
//usage: "\n s SMBus block"
//usage: "\n c Consecutive byte"
//usage: "\n Append p for SMBus PEC"
//usage: "\n"
//usage: "\n -f Force access"
//usage: "\n -y Disable interactive mode"
//usage: "\n -r Limit the number of registers being accessed"
int i2cdump_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int i2cdump_main(int argc UNUSED_PARAM, char **argv)
{
const unsigned opt_f = (1 << 0), opt_y = (1 << 1),
opt_r = (1 << 2);
int bus_num, bus_addr, mode = I2C_SMBUS_BYTE_DATA, even = 0, pec = 0;
unsigned first = 0x00, last = 0xff, opts;
int block[I2CDUMP_NUM_REGS];
char *opt_r_str, *dash;
int fd, res;
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
opts = getopt32(argv, "^"
"fyr:"
"\0" "-2:?3" /* from 2 to 3 args */,
&opt_r_str
);
argv += optind;
bus_num = i2c_bus_lookup(argv[0]);
bus_addr = i2c_parse_bus_addr(argv[1]);
if (argv[2]) {
switch (argv[2][0]) {
case 'b': /* Already set. */ break;
case 'c': mode = I2C_SMBUS_BYTE; break;
case 'w': mode = I2C_SMBUS_WORD_DATA; break;
case 'W':
mode = I2C_SMBUS_WORD_DATA;
even = 1;
break;
case 's': mode = I2C_SMBUS_BLOCK_DATA; break;
case 'i': mode = I2C_SMBUS_I2C_BLOCK_DATA; break;
default:
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("invalid mode");
}
if (argv[2][1] == 'p') {
if (argv[2][0] == 'W' || argv[2][0] == 'i') {
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die(
"pec not supported for -W and -i");
} else {
pec = 1;
}
}
}
if (opts & opt_r) {
first = strtol(opt_r_str, &dash, 0);
if (dash == opt_r_str || *dash != '-' || first > 0xff)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("invalid range");
last = xstrtou_range(++dash, 0, first, 0xff);
/* Range is not available for every mode. */
switch (mode) {
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:
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die(
"range not compatible with selected mode");
}
}
fd = i2c_dev_open(bus_num);
check_read_funcs(fd, mode, -1 /* data_addr */, pec);
i2c_set_slave_addr(fd, bus_addr, opts & opt_f);
if (pec)
i2c_set_pec(fd, 1);
if (!(opts & opt_y))
confirm_action(bus_addr, mode, -1 /* data_addr */, pec);
/* All but word data. */
if (mode != I2C_SMBUS_WORD_DATA || even) {
int blen = 0;
if (mode == I2C_SMBUS_BLOCK_DATA || mode == I2C_SMBUS_I2C_BLOCK_DATA)
blen = read_block_data(fd, mode, block);
if (mode == I2C_SMBUS_BYTE) {
res = i2c_smbus_write_byte(fd, first);
if (res < 0)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_perror_msg_and_die("write start address");
}
dump_data(fd, mode, first, last, block, blen);
} else {
dump_word_data(fd, first, last);
}
return 0;
}
#endif /* ENABLE_I2CDUMP */
#if ENABLE_I2CDETECT
enum adapter_type {
ADT_DUMMY = 0,
ADT_ISA,
ADT_I2C,
ADT_SMBUS,
};
struct adap_desc {
const char *funcs;
const char *algo;
};
static const struct adap_desc adap_descs[] ALIGN_PTR = {
{ .funcs = "dummy", .algo = "Dummy bus", },
{ .funcs = "isa", .algo = "ISA bus", },
{ .funcs = "i2c", .algo = "I2C adapter", },
{ .funcs = "smbus", .algo = "SMBus adapter", },
};
struct i2c_func {
long value;
const char* name;
};
static const struct i2c_func i2c_funcs_tab[] ALIGN_PTR = {
{ .value = I2C_FUNC_I2C,
.name = "I2C" },
{ .value = I2C_FUNC_SMBUS_QUICK,
.name = "SMBus quick command" },
{ .value = I2C_FUNC_SMBUS_WRITE_BYTE,
.name = "SMBus send byte" },
{ .value = I2C_FUNC_SMBUS_READ_BYTE,
.name = "SMBus receive byte" },
{ .value = I2C_FUNC_SMBUS_WRITE_BYTE_DATA,
.name = "SMBus write byte" },
{ .value = I2C_FUNC_SMBUS_READ_BYTE_DATA,
.name = "SMBus read byte" },
{ .value = I2C_FUNC_SMBUS_WRITE_WORD_DATA,
.name = "SMBus write word" },
{ .value = I2C_FUNC_SMBUS_READ_WORD_DATA,
.name = "SMBus read word" },
{ .value = I2C_FUNC_SMBUS_PROC_CALL,
.name = "SMBus process call" },
{ .value = I2C_FUNC_SMBUS_WRITE_BLOCK_DATA,
.name = "SMBus block write" },
{ .value = I2C_FUNC_SMBUS_READ_BLOCK_DATA,
.name = "SMBus block read" },
{ .value = I2C_FUNC_SMBUS_BLOCK_PROC_CALL,
.name = "SMBus block process call" },
{ .value = I2C_FUNC_SMBUS_PEC,
.name = "SMBus PEC" },
{ .value = I2C_FUNC_SMBUS_WRITE_I2C_BLOCK,
.name = "I2C block write" },
{ .value = I2C_FUNC_SMBUS_READ_I2C_BLOCK,
.name = "I2C block read" },
{ .value = 0, .name = NULL }
};
static enum adapter_type i2cdetect_get_funcs(int bus)
{
enum adapter_type ret;
unsigned long funcs;
int fd;
fd = i2c_dev_open(bus);
get_funcs_matrix(fd, &funcs);
if (funcs & I2C_FUNC_I2C)
ret = ADT_I2C;
else if (funcs & (I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
ret = ADT_SMBUS;
else
ret = ADT_DUMMY;
close(fd);
return ret;
}
static void NORETURN list_i2c_busses_and_exit(void)
{
const char *const i2cdev_path = "/sys/class/i2c-dev";
char path[NAME_MAX], name[128];
struct dirent *de, *subde;
enum adapter_type adt;
DIR *dir, *subdir;
int rv, bus;
char *pos;
FILE *fp;
/*
* XXX Upstream i2cdetect also looks for i2c bus info in /proc/bus/i2c,
* but we won't bother since it's only useful on older kernels (before
* 2.6.5). We expect sysfs to be present and mounted at /sys/.
*/
dir = xopendir(i2cdev_path);
while ((de = readdir(dir))) {
if (de->d_name[0] == '.')
continue;
/* Simple version for ISA chips. */
snprintf(path, NAME_MAX, "%s/%s/name",
i2cdev_path, de->d_name);
fp = fopen_for_read(path);
if (fp == NULL) {
snprintf(path, NAME_MAX,
"%s/%s/device/name",
i2cdev_path, de->d_name);
fp = fopen_for_read(path);
}
/* Non-ISA chips require the hard-way. */
if (fp == NULL) {
snprintf(path, NAME_MAX,
"%s/%s/device/name",
i2cdev_path, de->d_name);
subdir = opendir(path);
if (subdir == NULL)
continue;
while ((subde = readdir(subdir))) {
if (subde->d_name[0] == '.')
continue;
libbb: introduce and use is_prefixed_with() function old new delta is_prefixed_with - 18 +18 complete_username 78 77 -1 man_main 737 735 -2 fsck_device 429 427 -2 unpack_ar_archive 80 76 -4 strip_unsafe_prefix 105 101 -4 singlemount 1054 1050 -4 rtc_adjtime_is_utc 90 86 -4 resolve_mount_spec 88 84 -4 parse_one_line 1029 1025 -4 parse_conf 1460 1456 -4 may_wakeup 83 79 -4 loadkmap_main 219 215 -4 get_irqs_from_stat 103 99 -4 get_header_cpio 913 909 -4 findfs_main 79 75 -4 fbsplash_main 1230 1226 -4 load_crontab 776 771 -5 expand_vars_to_list 1151 1146 -5 date_main 881 876 -5 skip_dev_pfx 30 24 -6 make_device 2199 2193 -6 complete_cmd_dir_file 773 767 -6 run_applet_and_exit 715 708 -7 uudecode_main 321 313 -8 pwdx_main 197 189 -8 execute 568 560 -8 i2cdetect_main 1186 1176 -10 procps_scan 1242 1230 -12 procps_read_smaps 1017 1005 -12 process_module 746 734 -12 patch_main 1903 1891 -12 nfsmount 3572 3560 -12 stack_machine 126 112 -14 process_timer_stats 449 435 -14 match_fstype 111 97 -14 do_ipaddr 1344 1330 -14 open_list_and_close 359 343 -16 get_header_tar 1795 1779 -16 prepend_new_eth_table 340 323 -17 fsck_main 1811 1794 -17 find_iface_state 56 38 -18 dnsd_main 1321 1303 -18 base_device 179 158 -21 find_keyword 104 82 -22 handle_incoming_and_exit 2785 2762 -23 parse_and_put_prompt 774 746 -28 modinfo 347 317 -30 find_action 204 171 -33 update_passwd 1470 1436 -34 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-03-12 22:18:34 +05:30
if (is_prefixed_with(subde->d_name, "i2c-")) {
snprintf(path, NAME_MAX,
"%s/%s/device/%s/name",
i2cdev_path, de->d_name,
subde->d_name);
fp = fopen_for_read(path);
break;
}
}
}
if (fp != NULL) {
/*
* Get the rest of the info and display a line
* for a single bus.
*/
memset(name, 0, sizeof(name));
pos = fgets(name, sizeof(name), fp);
fclose(fp);
if (pos == NULL)
continue;
pos = strchr(name, '\n');
if (pos != NULL)
*pos = '\0';
rv = sscanf(de->d_name, "i2c-%d", &bus);
if (rv != 1)
continue;
libbb: introduce and use is_prefixed_with() function old new delta is_prefixed_with - 18 +18 complete_username 78 77 -1 man_main 737 735 -2 fsck_device 429 427 -2 unpack_ar_archive 80 76 -4 strip_unsafe_prefix 105 101 -4 singlemount 1054 1050 -4 rtc_adjtime_is_utc 90 86 -4 resolve_mount_spec 88 84 -4 parse_one_line 1029 1025 -4 parse_conf 1460 1456 -4 may_wakeup 83 79 -4 loadkmap_main 219 215 -4 get_irqs_from_stat 103 99 -4 get_header_cpio 913 909 -4 findfs_main 79 75 -4 fbsplash_main 1230 1226 -4 load_crontab 776 771 -5 expand_vars_to_list 1151 1146 -5 date_main 881 876 -5 skip_dev_pfx 30 24 -6 make_device 2199 2193 -6 complete_cmd_dir_file 773 767 -6 run_applet_and_exit 715 708 -7 uudecode_main 321 313 -8 pwdx_main 197 189 -8 execute 568 560 -8 i2cdetect_main 1186 1176 -10 procps_scan 1242 1230 -12 procps_read_smaps 1017 1005 -12 process_module 746 734 -12 patch_main 1903 1891 -12 nfsmount 3572 3560 -12 stack_machine 126 112 -14 process_timer_stats 449 435 -14 match_fstype 111 97 -14 do_ipaddr 1344 1330 -14 open_list_and_close 359 343 -16 get_header_tar 1795 1779 -16 prepend_new_eth_table 340 323 -17 fsck_main 1811 1794 -17 find_iface_state 56 38 -18 dnsd_main 1321 1303 -18 base_device 179 158 -21 find_keyword 104 82 -22 handle_incoming_and_exit 2785 2762 -23 parse_and_put_prompt 774 746 -28 modinfo 347 317 -30 find_action 204 171 -33 update_passwd 1470 1436 -34 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-03-12 22:18:34 +05:30
if (is_prefixed_with(name, "ISA"))
adt = ADT_ISA;
else
adt = i2cdetect_get_funcs(bus);
printf(
"i2c-%d\t%-10s\t%-32s\t%s\n",
bus, adap_descs[adt].funcs,
name, adap_descs[adt].algo);
}
}
exit(EXIT_SUCCESS);
}
static void NORETURN no_support(const char *cmd)
{
bb_error_msg_and_die("bus doesn't support %s", cmd);
}
static void will_skip(const char *cmd)
{
bb_error_msg(
"warning: can't use %s command, "
"will skip some addresses", cmd);
}
//usage:#define i2cdetect_trivial_usage
//usage: "-l | -F I2CBUS | [-ya] [-q|-r] I2CBUS [FIRST LAST]"
//usage:#define i2cdetect_full_usage "\n\n"
//usage: "Detect I2C chips"
//usage: "\n"
//usage: "\n -l List installed buses"
//usage: "\n -F BUS# List functionalities on this bus"
//usage: "\n -y Disable interactive mode"
//usage: "\n -a Force scanning of non-regular addresses"
//usage: "\n -q Use smbus quick write commands for probing (default)"
//usage: "\n -r Use smbus read byte commands for probing"
//usage: "\n FIRST and LAST limit probing range"
int i2cdetect_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int i2cdetect_main(int argc UNUSED_PARAM, char **argv)
{
const unsigned opt_y = (1 << 0), opt_a = (1 << 1),
opt_q = (1 << 2), opt_r = (1 << 3),
opt_F = (1 << 4), opt_l = (1 << 5);
int fd, bus_num, i, j, mode = I2CDETECT_MODE_AUTO, status, cmd;
unsigned first = 0x03, last = 0x77, opts;
unsigned long funcs;
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
opts = getopt32(argv, "^"
"yaqrFl"
"\0"
"q--r:r--q:"/*mutually exclusive*/
"?3"/*up to 3 args*/
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
);
argv += optind;
if (opts & opt_l)
list_i2c_busses_and_exit();
if (!argv[0])
bb_show_usage();
bus_num = i2c_bus_lookup(argv[0]);
fd = i2c_dev_open(bus_num);
get_funcs_matrix(fd, &funcs);
if (opts & opt_F) {
/* Only list the functionalities. */
printf("Functionalities implemented by bus #%d\n", bus_num);
for (i = 0; i2c_funcs_tab[i].value; i++) {
printf("%-32s %s\n", i2c_funcs_tab[i].name,
funcs & i2c_funcs_tab[i].value ? "yes" : "no");
}
return EXIT_SUCCESS;
}
if (opts & opt_r)
mode = I2CDETECT_MODE_READ;
else if (opts & opt_q)
mode = I2CDETECT_MODE_QUICK;
if (opts & opt_a) {
first = 0x00;
last = 0x7f;
}
/* Read address range. */
if (argv[1]) {
first = xstrtou_range(argv[1], 16, first, last);
if (argv[2])
last = xstrtou_range(argv[2], 16, first, last);
}
if (!(funcs & (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_READ_BYTE))) {
no_support("detection commands");
} else
if (mode == I2CDETECT_MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_QUICK)) {
no_support("SMBus quick write");
} else
if (mode == I2CDETECT_MODE_READ && !(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
no_support("SMBus receive byte");
}
if (mode == I2CDETECT_MODE_AUTO) {
if (!(funcs & I2C_FUNC_SMBUS_QUICK))
will_skip("SMBus quick write");
if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE))
will_skip("SMBus receive byte");
}
if (!(opts & opt_y))
confirm_action(-1, -1, -1, 0);
puts(" 0 1 2 3 4 5 6 7 8 9 a b c d e f");
for (i = 0; i < 128; i += 16) {
printf("%02x: ", i);
for (j = 0; j < 16; j++) {
fflush_all();
cmd = mode;
if (mode == I2CDETECT_MODE_AUTO) {
if ((i+j >= 0x30 && i+j <= 0x37) ||
(i+j >= 0x50 && i+j <= 0x5F))
cmd = I2CDETECT_MODE_READ;
else
cmd = I2CDETECT_MODE_QUICK;
}
/* Skip unwanted addresses. */
if (i+j < first
|| i+j > last
|| (cmd == I2CDETECT_MODE_READ && !(funcs & I2C_FUNC_SMBUS_READ_BYTE))
|| (cmd == I2CDETECT_MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_QUICK)))
{
printf(" ");
continue;
}
status = ioctl(fd, I2C_SLAVE, itoptr(i + j));
if (status < 0) {
if (errno == EBUSY) {
printf("UU ");
continue;
}
bb_perror_msg_and_die(
"can't set address to 0x%02x", i + j);
}
switch (cmd) {
case I2CDETECT_MODE_READ:
/*
* This is known to lock SMBus on various
* write-only chips (mainly clock chips).
*/
status = i2c_smbus_read_byte(fd);
break;
default: /* I2CDETECT_MODE_QUICK: */
/*
* This is known to corrupt the Atmel
* AT24RF08 EEPROM.
*/
status = i2c_smbus_write_quick(fd,
I2C_SMBUS_WRITE);
break;
}
if (status < 0)
printf("-- ");
else
printf("%02x ", i+j);
}
bb_putchar('\n');
}
return 0;
}
#endif /* ENABLE_I2CDETECT */
#if ENABLE_I2CTRANSFER
static void check_i2c_func(int fd)
{
unsigned long funcs;
get_funcs_matrix(fd, &funcs);
if (!(funcs & I2C_FUNC_I2C))
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("adapter does not support I2C transfers");
}
//usage:#define i2ctransfer_trivial_usage
//usage: "[-fay] I2CBUS {rLENGTH[@ADDR] | wLENGTH[@ADDR] DATA...}..."
//usage:#define i2ctransfer_full_usage "\n\n"
//usage: "Read/write I2C data in one transfer"
//usage: "\n"
//usage: "\n -f Force access to busy addresses"
//usage: "\n -a Force access to non-regular addresses"
//usage: "\n -y Disable interactive mode"
int i2ctransfer_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int i2ctransfer_main(int argc UNUSED_PARAM, char **argv)
{
enum {
opt_f = (1 << 0),
opt_y = (1 << 1),
opt_a = (1 << 2),
};
int bus_num, bus_addr;
int fd;
unsigned opts, first, last;
int nmsgs, nmsgs_sent, i;
struct i2c_msg msgs[I2C_RDWR_IOCTL_MAX_MSGS];
struct i2c_rdwr_ioctl_data rdwr;
memset(msgs, 0, sizeof(msgs));
opts = getopt32(argv, "^"
"fya"
"\0" "-2" /* minimum 2 args */
);
first = 0x03;
last = 0x77;
if (opts & opt_a) {
first = 0x00;
last = 0x7f;
}
argv += optind;
bus_num = i2c_bus_lookup(argv[0]);
fd = i2c_dev_open(bus_num);
check_i2c_func(fd);
bus_addr = -1;
nmsgs = 0;
while (*++argv) {
char *arg_ptr;
unsigned len;
uint16_t flags;
char *end;
if (nmsgs >= I2C_RDWR_IOCTL_MAX_MSGS)
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
bb_simple_error_msg_and_die("too many messages, max: "I2C_RDWR_IOCTL_MAX_MSGS_STR);
flags = 0;
arg_ptr = *argv;
switch (*arg_ptr++) {
case 'r': flags |= I2C_M_RD; break;
case 'w': break;
default:
bb_show_usage();
}
end = strchr(arg_ptr, '@');
if (end) *end = '\0';
len = xstrtou_range(arg_ptr, 0, 0, 0xffff);
if (end) {
bus_addr = xstrtou_range(end + 1, 0, first, last);
i2c_set_slave_addr(fd, bus_addr, (opts & opt_f));
} else {
/* Reuse last address if possible */
if (bus_addr < 0)
bb_error_msg_and_die("no address given in '%s'", *argv);
}
msgs[nmsgs].addr = bus_addr;
msgs[nmsgs].flags = flags;
msgs[nmsgs].len = len;
if (len)
msgs[nmsgs].buf = xzalloc(len);
if (!(flags & I2C_M_RD)) {
/* Consume DATA arg(s) */
unsigned buf_idx = 0;
while (buf_idx < len) {
uint8_t data8;
unsigned long data;
arg_ptr = *++argv;
if (!arg_ptr)
bb_show_usage();
data = strtoul(arg_ptr, &end, 0);
if (data > 0xff || arg_ptr == end)
bb_error_msg_and_die("invalid data byte '%s'", *argv);
data8 = data;
while (buf_idx < len) {
msgs[nmsgs].buf[buf_idx++] = data8;
if (!*end)
break;
switch (*end) {
/* Pseudo randomness (8 bit AXR with a=13 and b=27) */
case 'p':
data8 = (data8 ^ 27) + 13;
data8 = (data8 << 1) | (data8 >> 7);
break;
case '+': data8++; break;
case '-': data8--; break;
case '=': break;
default:
bb_error_msg_and_die("invalid data byte suffix: '%s'",
*argv);
}
}
}
}
nmsgs++;
}
if (!(opts & opt_y))
confirm_action(bus_addr, 0, 0, 0);
rdwr.msgs = msgs;
rdwr.nmsgs = nmsgs;
nmsgs_sent = ioctl_or_perror_and_die(fd, I2C_RDWR, &rdwr, "I2C_RDWR");
if (nmsgs_sent < nmsgs)
bb_error_msg("warning: only %u/%u messages sent", nmsgs_sent, nmsgs);
for (i = 0; i < nmsgs_sent; i++) {
if (msgs[i].len != 0 && (msgs[i].flags & I2C_M_RD)) {
int j;
for (j = 0; j < msgs[i].len - 1; j++)
printf("0x%02x ", msgs[i].buf[j]);
/* Print final byte with newline */
printf("0x%02x\n", msgs[i].buf[j]);
}
}
# if ENABLE_FEATURE_CLEAN_UP
close(fd);
for (i = 0; i < nmsgs; i++)
free(msgs[i].buf);
# endif
return 0;
}
#endif /* ENABLE_I2CTRANSFER */