*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
//config:config I2CGET
-//config: bool "i2cget"
+//config: bool "i2cget (5.5 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
-//config: Read from I2C/SMBus chip registers.
+//config: Read from I2C/SMBus chip registers.
//config:
//config:config I2CSET
-//config: bool "i2cset"
+//config: bool "i2cset (6.7 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
-//config: Set I2C registers.
+//config: Set I2C registers.
//config:
//config:config I2CDUMP
-//config: bool "i2cdump"
+//config: bool "i2cdump (7.1 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
-//config: Examine I2C registers.
+//config: Examine I2C registers.
//config:
//config:config I2CDETECT
-//config: bool "i2cdetect"
+//config: bool "i2cdetect (7.1 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
-//config: Detect I2C chips.
+//config: Detect I2C chips.
+//config:
+//config:config I2CTRANSFER
+//config: bool "i2ctransfer (4.0 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//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:
#include "libbb.h"
-/*
- * /dev/i2c-X ioctl commands. The ioctl's parameter is always an unsigned long,
- * except for:
- * - I2C_FUNCS, takes pointer to an unsigned long
- * - I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data
- * - I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data
- */
+#include <linux/i2c.h>
-/*
- * NOTE: Slave address is 7 or 10 bits, but 10-bit addresses
- * are not supported due to code brokenness.
- */
+#define I2CDUMP_NUM_REGS 256
-/* Use this slave address. */
-#define I2C_SLAVE 0x0703
-/* Use this slave address, even if it is already in use by a driver. */
-#define I2C_SLAVE_FORCE 0x0706
-/* 0 for 7 bit addrs, != 0 for 10 bit. */
-#define I2C_TENBIT 0x0704
-/* Get the adapter functionality mask. */
-#define I2C_FUNCS 0x0705
-/* Combined R/W transfer (one STOP only). */
-#define I2C_RDWR 0x0707
-/* != 0 to use PEC with SMBus. */
-#define I2C_PEC 0x0708
-/* SMBus transfer. */
-#define I2C_SMBUS 0x0720
-
-/* Structure used in the I2C_SMBUS ioctl call. */
+#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 {
- uint8_t read_write;
- uint8_t command;
- uint32_t size;
+ __u8 read_write;
+ __u8 command;
+ __u32 size;
union i2c_smbus_data *data;
};
-
-/* Structure used in the I2C_RDWR ioctl call. */
struct i2c_rdwr_ioctl_data {
- struct i2c_msg *msgs; /* Pointers to i2c_msgs. */
- uint32_t nmsgs; /* Number of i2c_msgs. */
-};
-
-/* As specified in SMBus standard. */
-#define I2C_SMBUS_BLOCK_MAX 32
-/* Not specified but we use same structure. */
-#define I2C_SMBUS_I2C_BLOCK_MAX 32
-
-/* Data for SMBus Messages. */
-union i2c_smbus_data {
- uint8_t byte;
- uint16_t word;
- /* block[0] is used for length and one more for PEC */
- uint8_t block[I2C_SMBUS_BLOCK_MAX + 2];
+ struct i2c_msg *msgs; /* pointers to i2c_msgs */
+ __u32 nmsgs; /* number of i2c_msgs */
};
-
-#define I2C_RDRW_IOCTL_MAX_MSGS 42
-#define I2C_MAX_REGS 256
-
-/* Smbus_access read or write markers. */
-#define I2C_SMBUS_READ 1
-#define I2C_SMBUS_WRITE 0
-
-/* SMBus transaction types (size parameter in the below functions). */
-#define I2C_SMBUS_QUICK 0
-#define I2C_SMBUS_BYTE 1
-#define I2C_SMBUS_BYTE_DATA 2
-#define I2C_SMBUS_WORD_DATA 3
-#define I2C_SMBUS_PROC_CALL 4
-#define I2C_SMBUS_BLOCK_DATA 5
-#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
-#define I2C_SMBUS_BLOCK_PROC_CALL 7
-#define I2C_SMBUS_I2C_BLOCK_DATA 8
-
-#define DETECT_MODE_AUTO 0
-#define DETECT_MODE_QUICK 1
-#define DETECT_MODE_READ 2
-
-/* Defines to determine what functionality is present. */
-#define I2C_FUNC_I2C 0x00000001
-#define I2C_FUNC_10BIT_ADDR 0x00000002
-#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004
-#define I2C_FUNC_SMBUS_PEC 0x00000008
-#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000
-#define I2C_FUNC_SMBUS_QUICK 0x00010000
-#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
-#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
-#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
-#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
-#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
-#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
-#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
-#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
-#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
-#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000
-#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000
-
-#define I2C_FUNC_SMBUS_BYTE (I2C_FUNC_SMBUS_READ_BYTE | \
- I2C_FUNC_SMBUS_WRITE_BYTE)
-#define I2C_FUNC_SMBUS_BYTE_DATA (I2C_FUNC_SMBUS_READ_BYTE_DATA | \
- I2C_FUNC_SMBUS_WRITE_BYTE_DATA)
-#define I2C_FUNC_SMBUS_WORD_DATA (I2C_FUNC_SMBUS_READ_WORD_DATA | \
- I2C_FUNC_SMBUS_WRITE_WORD_DATA)
-#define I2C_FUNC_SMBUS_BLOCK_DATA (I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
- I2C_FUNC_SMBUS_WRITE_BLOCK_DATA)
-#define I2C_FUNC_SMBUS_I2C_BLOCK (I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
- I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)
+/* end linux/i2c-dev.h */
/*
* This is needed for ioctl_or_perror_and_die() since it only accepts pointers.
return xstrtou_range(bus_str, 10, 0, 0xfffff);
}
-#if ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP
+#if ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP || ENABLE_I2CTRANSFER
static int i2c_parse_bus_addr(const char *addr_str)
{
/* Slave address must be in range 0x03 - 0x77. */
itoptr(pec ? 1 : 0),
"can't set PEC");
}
+
+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 /* ENABLE_I2CGET || ENABLE_I2CSET || ENABLE_I2CDUMP */
#if ENABLE_I2CGET || ENABLE_I2CSET
return fd;
}
-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);
-}
-
/* Size reducing helpers for xxx_check_funcs(). */
static void get_funcs_matrix(int fd, unsigned long *funcs)
{
static void check_funcs_test_end(int funcs, int pec, const char *err)
{
if (pec && !(funcs & (I2C_FUNC_SMBUS_PEC | I2C_FUNC_I2C)))
- bb_error_msg("warning: adapter does not support PEC");
+ bb_simple_error_msg("warning: adapter does not support PEC");
if (err)
bb_error_msg_and_die(
break;
#endif /* ENABLE_I2CDUMP */
default:
- bb_error_msg_and_die("Programmer goofed!");
+ bb_simple_error_msg_and_die("internal error");
}
check_funcs_test_end(funcs, pec, err);
}
static void confirm_or_abort(void)
{
fprintf(stderr, "Continue? [y/N] ");
- fflush_all();
- if (!bb_ask_confirmation())
- bb_error_msg_and_die("aborting");
+ if (!bb_ask_y_confirmation())
+ bb_simple_error_msg_and_die("aborting");
}
/*
*/
static void confirm_action(int bus_addr, int mode, int data_addr, int pec)
{
- bb_error_msg("WARNING! This program can confuse your I2C bus");
+ 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) {
- bb_error_msg_and_die("this is I2C not smbus - using PEC on I2C "
+ 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)
- bb_error_msg("WARNING! May interpret a write byte command "
+ bb_simple_error_msg("WARNING! May interpret a write byte command "
"with PEC as a write byte data command");
if (pec)
- bb_error_msg("PEC checking enabled");
+ bb_simple_error_msg("PEC checking enabled");
confirm_or_abort();
}
#if ENABLE_I2CGET
//usage:#define i2cget_trivial_usage
-//usage: "[-f] [-y] BUS CHIP-ADDRESS [DATA-ADDRESS [MODE]]"
+//usage: "[-fy] BUS CHIP-ADDRESS [DATA-ADDRESS [MODE]]"
//usage:#define i2cget_full_usage "\n\n"
-//usage: "Read from I2C/SMBus chip registers\n"
-//usage: "\n I2CBUS i2c bus number"
-//usage: "\n ADDRESS 0x03 - 0x77"
+//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 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"
+//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);
- const char *const optstr = "fy";
int bus_num, bus_addr, data_addr = -1, status;
int mode = I2C_SMBUS_BYTE, pec = 0, fd;
unsigned opts;
- opt_complementary = "-2:?4"; /* from 2 to 4 args */
- opts = getopt32(argv, optstr);
+ opts = getopt32(argv, "^" "fy" "\0" "-2:?4"/*from 2 to 4 args*/);
argv += optind;
bus_num = i2c_bus_lookup(argv[0]);
case 'w': mode = I2C_SMBUS_WORD_DATA; break;
case 'c': mode = I2C_SMBUS_BYTE; break;
default:
- bb_error_msg("invalid mode");
+ bb_simple_error_msg("invalid mode");
bb_show_usage();
}
pec = argv[3][1] == 'p';
if (data_addr >= 0) {
status = i2c_smbus_write_byte(fd, data_addr);
if (status < 0)
- bb_error_msg("warning - write failed");
+ bb_simple_error_msg("warning - write failed");
}
status = i2c_smbus_read_byte(fd);
break;
close(fd);
if (status < 0)
- bb_perror_msg_and_die("read failed");
+ bb_simple_perror_msg_and_die("read failed");
printf("0x%0*x\n", mode == I2C_SMBUS_WORD_DATA ? 4 : 2, status);
#if ENABLE_I2CSET
//usage:#define i2cset_trivial_usage
-//usage: "[-f] [-y] [-m MASK] BUS CHIP-ADDR DATA-ADDR [VALUE] ... [MODE]"
+//usage: "[-fy] [-m MASK] BUS CHIP-ADDRESS DATA-ADDRESS [VALUE] ... [MODE]"
//usage:#define i2cset_full_usage "\n\n"
-//usage: "Set I2C registers\n"
-//usage: "\n I2CBUS i2c bus number"
-//usage: "\n ADDRESS 0x03 - 0x77"
+//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 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"
+//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);
- const char *const optstr = "fym:r";
int bus_num, bus_addr, data_addr, mode = I2C_SMBUS_BYTE, pec = 0;
- int val, blen = 0, mask = 0, fd, status;
+ int val, blen, mask, fd, status;
unsigned char block[I2C_SMBUS_BLOCK_MAX];
char *opt_m_arg = NULL;
unsigned opts;
- opt_complementary = "-3"; /* from 3 to ? args */
- opts = getopt32(argv, optstr, &opt_m_arg);
+ 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]);
if (!argv[4] && argv[3][0] != 'c') {
mode = I2C_SMBUS_BYTE_DATA; /* Implicit b */
} else {
- switch (argv[argc-1][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;
+ 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:
- bb_error_msg("invalid mode");
+ bb_simple_error_msg("invalid mode");
bb_show_usage();
}
- pec = argv[argc-1][1] == 'p';
- if (mode == I2C_SMBUS_BLOCK_DATA ||
- mode == I2C_SMBUS_I2C_BLOCK_DATA) {
+ 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)
- bb_error_msg_and_die(
+ bb_simple_error_msg_and_die(
"PEC not supported for I2C "
"block writes");
if (opts & opt_m)
- bb_error_msg_and_die(
+ 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_BLOCK_DATA:
case I2C_SMBUS_I2C_BLOCK_DATA:
- for (blen = 3; blen < (argc - 1); blen++)
- block[blen] = xstrtou_range(argv[blen], 0, 0, 0xff);
+ for (blen = 3; blen < argc; blen++)
+ block[blen - 3] = xstrtou_range(argv[blen], 0, 0, 0xff);
+ blen -= 3;
val = -1;
break;
default:
}
if (tmpval < 0)
- bb_perror_msg_and_die("can't read old value");
+ bb_simple_perror_msg_and_die("can't read old value");
val = (val & mask) | (tmpval & ~mask);
break;
}
if (status < 0)
- bb_perror_msg_and_die("write failed");
+ bb_simple_perror_msg_and_die("write failed");
if (pec)
i2c_set_pec(fd, 0); /* Clear PEC. */
}
if (status < 0) {
- printf("Warning - readback failed\n");
+ puts("Warning - readback failed");
} else
if (status != val) {
printf("Warning - data mismatch - wrote "
#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: "[-f] [-r FIRST-LAST] [-y] BUS ADDR [MODE]"
+//usage: "[-fy] [-r FIRST-LAST] BUS ADDR [MODE]"
//usage:#define i2cdump_full_usage "\n\n"
-//usage: "Examine I2C registers\n"
-//usage: "\n I2CBUS i2c bus number"
-//usage: "\n ADDRESS 0x03 - 0x77"
+//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 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 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"
+//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);
- const char *const optstr = "fyr:";
int bus_num, bus_addr, mode = I2C_SMBUS_BYTE_DATA, even = 0, pec = 0;
- unsigned first = 0x00, last = 0xff;
- int fd, i, j, res, blen = 0, tmp;
- unsigned char cblock[I2C_SMBUS_BLOCK_MAX + I2C_MAX_REGS];
- unsigned char block[I2C_SMBUS_BLOCK_MAX];
+ unsigned first = 0x00, last = 0xff, opts;
+ int block[I2CDUMP_NUM_REGS];
char *opt_r_str, *dash;
- unsigned opts;
+ int fd, res;
- opt_complementary = "-2:?3"; /* from 2 to 3 args */
- opts = getopt32(argv, optstr, &opt_r_str);
+ opts = getopt32(argv, "^"
+ "fyr:"
+ "\0" "-2:?3" /* from 2 to 3 args */,
+ &opt_r_str
+ );
argv += optind;
bus_num = i2c_bus_lookup(argv[0]);
if (argv[2]) {
switch (argv[2][0]) {
- case 'b': /* Already set */ break;
+ case 'b': /* Already set. */ break;
case 'c': mode = I2C_SMBUS_BYTE; break;
case 'w': mode = I2C_SMBUS_WORD_DATA; break;
case 'W':
case 's': mode = I2C_SMBUS_BLOCK_DATA; break;
case 'i': mode = I2C_SMBUS_I2C_BLOCK_DATA; break;
default:
- bb_error_msg_and_die("invalid mode");
+ bb_simple_error_msg_and_die("invalid mode");
}
if (argv[2][1] == 'p') {
if (argv[2][0] == 'W' || argv[2][0] == 'i') {
- bb_error_msg_and_die(
+ 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)
- bb_error_msg_and_die("invalid range");
+ bb_simple_error_msg_and_die("invalid range");
last = xstrtou_range(++dash, 0, first, 0xff);
- /* Range is not available for every mode */
+ /* Range is not available for every mode. */
switch (mode) {
case I2C_SMBUS_BYTE:
case I2C_SMBUS_BYTE_DATA:
break;
/* Fall through */
default:
- bb_error_msg_and_die(
+ bb_simple_error_msg_and_die(
"range not compatible with selected mode");
}
}
if (!(opts & opt_y))
confirm_action(bus_addr, mode, -1 /* data_addr */, pec);
- /* All but word data */
+ /* All but word data. */
if (mode != I2C_SMBUS_WORD_DATA || even) {
- /*
- * FIXME This section has been ported from upstream i2cdump.
- * It has been reworked a bit but is still pretty spaghetti
- * and needs splitting into several functions.
- */
- if (mode == I2C_SMBUS_BLOCK_DATA ||
- mode == I2C_SMBUS_I2C_BLOCK_DATA) {
- res = i2c_smbus_read_block_data(fd, 0, cblock);
- blen = res;
- } else {
- for (res = 0; res < I2C_MAX_REGS; res += tmp) {
- tmp = i2c_smbus_read_i2c_block_data(
- fd, res, I2C_SMBUS_BLOCK_MAX,
- cblock + res);
- if (tmp < 0) {
- bb_error_msg_and_die(
- "block read failed");
- }
- }
- if (res >= I2C_MAX_REGS)
- res = I2C_MAX_REGS;
- for (i = 0; i < res; i++)
- block[i] = cblock[i];
- if (mode != I2C_SMBUS_BLOCK_DATA)
- for (i = res; i < I2C_MAX_REGS; i++)
- cblock[i] = -1;
- }
+ 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)
- bb_perror_msg_and_die(
- "write start address failed");
+ bb_simple_perror_msg_and_die("write start address");
}
- printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f"
- " 0123456789abcdef\n");
-
- for (i = 0; i < I2C_MAX_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(fd, i+j);
- block[i+j] = res;
- break;
- case I2C_SMBUS_WORD_DATA:
- res = i2c_smbus_read_word_data(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(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) {
- printf(" ");
- continue;
- }
-
- res = block[i+j];
- if (res < 0) {
-//FIXME: impossible, block[] is uchar[]
- printf("X");
- } else if (res == 0x00 || res == 0xff) {
- printf(".");
- } else if (res < 32 || res >= 127) {
- printf("?");
- } else {
- printf("%c", res);
- }
- }
- printf("\n");
- }
+ dump_data(fd, mode, first, last, block, blen);
} else {
- /* Word data. */
- printf(" 0,8 1,9 2,a 3,b 4,c 5,d 6,e 7,f\n");
- for (i = 0; i < 256; i += 8) {
- 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;
- }
-
- res = i2c_smbus_read_word_data(fd, i+j);
- if (res < 0)
- printf("XXXX ");
- else
- printf("%04x ", res & 0xffff);
- }
- printf("\n");
- }
+ dump_word_data(fd, first, last);
}
return 0;
{ .value = I2C_FUNC_I2C,
.name = "I2C" },
{ .value = I2C_FUNC_SMBUS_QUICK,
- .name = "SMBus Quick Command" },
+ .name = "SMBus quick command" },
{ .value = I2C_FUNC_SMBUS_WRITE_BYTE,
- .name = "SMBus Send Byte" },
+ .name = "SMBus send byte" },
{ .value = I2C_FUNC_SMBUS_READ_BYTE,
- .name = "SMBus Receive Byte" },
+ .name = "SMBus receive byte" },
{ .value = I2C_FUNC_SMBUS_WRITE_BYTE_DATA,
- .name = "SMBus Write Byte" },
+ .name = "SMBus write byte" },
{ .value = I2C_FUNC_SMBUS_READ_BYTE_DATA,
- .name = "SMBus Read Byte" },
+ .name = "SMBus read byte" },
{ .value = I2C_FUNC_SMBUS_WRITE_WORD_DATA,
- .name = "SMBus Write Word" },
+ .name = "SMBus write word" },
{ .value = I2C_FUNC_SMBUS_READ_WORD_DATA,
- .name = "SMBus Read Word" },
+ .name = "SMBus read word" },
{ .value = I2C_FUNC_SMBUS_PROC_CALL,
- .name = "SMBus Process Call" },
+ .name = "SMBus process call" },
{ .value = I2C_FUNC_SMBUS_WRITE_BLOCK_DATA,
- .name = "SMBus Block Write" },
+ .name = "SMBus block write" },
{ .value = I2C_FUNC_SMBUS_READ_BLOCK_DATA,
- .name = "SMBus Block Read" },
+ .name = "SMBus block read" },
{ .value = I2C_FUNC_SMBUS_BLOCK_PROC_CALL,
- .name = "SMBus Block Process 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" },
+ .name = "I2C block write" },
{ .value = I2C_FUNC_SMBUS_READ_I2C_BLOCK,
- .name = "I2C Block Read" },
+ .name = "I2C block read" },
{ .value = 0, .name = NULL }
};
i2cdev_path, de->d_name,
subde->d_name);
fp = fopen(path, "r");
- goto found;
+ break;
}
}
}
-found:
if (fp != NULL) {
/*
* Get the rest of the info and display a line
}
//usage:#define i2cdetect_trivial_usage
-//usage: "[-F I2CBUS] [-l] [-y] [-a] [-q|-r] I2CBUS [FIRST LAST]"
+//usage: "-l | -F I2CBUS | [-ya] [-q|-r] I2CBUS [FIRST LAST]"
//usage:#define i2cdetect_full_usage "\n\n"
-//usage: "Detect I2C chips.\n"
-//usage: "\n I2CBUS i2c bus number"
-//usage: "\n FIRST and LAST limit the probing range"
+//usage: "Detect I2C chips"
//usage: "\n"
-//usage: "\n -l output list of installed busses"
-//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 -F display list of functionalities"
+//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);
- const char *const optstr = "yaqrFl";
- int fd, bus_num, i, j, mode = DETECT_MODE_AUTO;
- int status;
- unsigned first = 0x00, last = 0x77;
+ int fd, bus_num, i, j, mode = I2CDETECT_MODE_AUTO, status, cmd;
+ unsigned first = 0x03, last = 0x77, opts;
unsigned long funcs;
- unsigned opts;
- opt_complementary = "q--r:r--q:" /* mutually exclusive */
- "?3"; /* up to 3 args */
- opts = getopt32(argv, optstr);
+ opts = getopt32(argv, "^"
+ "yaqrFl"
+ "\0"
+ "q--r:r--q:"/*mutually exclusive*/
+ "?3"/*up to 3 args*/
+ );
argv += optind;
if (opts & opt_l)
}
if (opts & opt_r)
- mode = DETECT_MODE_READ;
+ mode = I2CDETECT_MODE_READ;
else if (opts & opt_q)
- mode = DETECT_MODE_QUICK;
+ mode = I2CDETECT_MODE_QUICK;
- if (opts & opt_a)
+ if (opts & opt_a) {
+ first = 0x00;
last = 0x7f;
+ }
/* Read address range. */
if (argv[1]) {
if (!(funcs & (I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_READ_BYTE))) {
no_support("detection commands");
} else
- if (mode == DETECT_MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_QUICK)) {
- no_support("SMBus Quick Write command");
+ if (mode == I2CDETECT_MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_QUICK)) {
+ no_support("SMBus quick write");
} else
- if (mode == DETECT_MODE_READ && !(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
- no_support("SMBus Receive Byte command");
- } 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");
+ will_skip("SMBus quick write");
if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE))
- will_skip("SMBus Receive Byte");
+ will_skip("SMBus receive byte");
}
if (!(opts & opt_y))
confirm_action(-1, -1, -1, 0);
- printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\n");
+ 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++) {
+ for (j = 0; j < 16; j++) {
fflush_all();
- if (mode == DETECT_MODE_AUTO) {
+ cmd = mode;
+ if (mode == I2CDETECT_MODE_AUTO) {
if ((i+j >= 0x30 && i+j <= 0x37) ||
(i+j >= 0x50 && i+j <= 0x5F))
- mode = DETECT_MODE_READ;
+ cmd = I2CDETECT_MODE_READ;
else
- mode = DETECT_MODE_QUICK;
+ cmd = I2CDETECT_MODE_QUICK;
}
/* Skip unwanted addresses. */
if (i+j < first
|| i+j > last
- || (mode == DETECT_MODE_READ && !(funcs & I2C_FUNC_SMBUS_READ_BYTE))
- || (mode == DETECT_MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_QUICK)))
+ || (cmd == I2CDETECT_MODE_READ && !(funcs & I2C_FUNC_SMBUS_READ_BYTE))
+ || (cmd == I2CDETECT_MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_QUICK)))
{
printf(" ");
continue;
}
- i2c_set_slave_addr(fd, i + j, 0);
+ status = ioctl(fd, I2C_SLAVE, itoptr(i + j));
+ if (status < 0) {
+ if (errno == EBUSY) {
+ printf("UU ");
+ continue;
+ }
- switch (mode) {
- case DETECT_MODE_READ:
+ 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: /* DETECT_MODE_QUICK: */
+ default: /* I2CDETECT_MODE_QUICK: */
/*
* This is known to corrupt the Atmel
* AT24RF08 EEPROM.
else
printf("%02x ", i+j);
}
- printf("\n");
+ 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))
+ 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)
+ 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 */
projects / oweals / busybox.git / blobdiff