*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
//config:config I2CGET
-//config: bool "i2cget"
+//config: bool "i2cget (5.6 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 (6.9 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 (7.2 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 (7.2 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
-//config: Detect I2C chips.
+//config: Detect I2C chips.
//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))
+/* 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
#include "libbb.h"
#include <linux/i2c.h>
-#include <linux/i2c-dev.h>
#define I2CDUMP_NUM_REGS 256
#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
+struct i2c_smbus_ioctl_data {
+ __u8 read_write;
+ __u8 command;
+ __u32 size;
+ union i2c_smbus_data *data;
+};
+/* end linux/i2c-dev.h */
+
/*
* This is needed for ioctl_or_perror_and_die() since it only accepts pointers.
*/
break;
#endif /* ENABLE_I2CDUMP */
default:
- bb_error_msg_and_die("Programmer goofed!");
+ bb_error_msg_and_die("internal error");
}
check_funcs_test_end(funcs, pec, err);
}
#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]);
#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;
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"/*from 3 to ? args*/, &opt_m_arg);
argv += optind;
argc -= optind;
uint8_t cblock[I2C_SMBUS_BLOCK_MAX + I2CDUMP_NUM_REGS];
int res, blen = 0, tmp, i;
- if (mode == I2C_SMBUS_BLOCK_DATA || mode == I2C_SMBUS_I2C_BLOCK_DATA) {
- res = i2c_smbus_read_block_data(buf_fd, 0, cblock);
- blen = res;
+ 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) {
- bb_error_msg_and_die("block read failed");
+ if (tmp <= 0) {
+ blen = tmp;
+ goto fail;
}
}
}
return blen;
+
+ fail:
+ bb_error_msg_and_die("block read failed: %d", blen);
}
/* Dump all but word data. */
}
//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, opts;
- int *block = (int *)bb_common_bufsiz1;
+ int block[I2CDUMP_NUM_REGS];
char *opt_r_str, *dash;
- int fd, res, blen;
+ 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]);
/* All but word data. */
if (mode != I2C_SMBUS_WORD_DATA || even) {
- blen = read_block_data(fd, mode, block);
+ 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);
{ .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 }
};
}
//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 = I2CDETECT_MODE_AUTO, status;
+ int fd, bus_num, i, j, mode = I2CDETECT_MODE_AUTO, status, cmd;
unsigned first = 0x03, last = 0x77, opts;
unsigned long funcs;
- 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)
no_support("detection commands");
} else
if (mode == I2CDETECT_MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_QUICK)) {
- no_support("SMBus Quick Write command");
+ no_support("SMBus quick write");
} else
if (mode == I2CDETECT_MODE_READ && !(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
- no_support("SMBus Receive Byte command");
+ 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))
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();
+ cmd = mode;
if (mode == I2CDETECT_MODE_AUTO) {
if ((i+j >= 0x30 && i+j <= 0x37) ||
(i+j >= 0x50 && i+j <= 0x5F))
- mode = I2CDETECT_MODE_READ;
+ cmd = I2CDETECT_MODE_READ;
else
- mode = I2CDETECT_MODE_QUICK;
+ cmd = I2CDETECT_MODE_QUICK;
}
/* Skip unwanted addresses. */
if (i+j < first
|| i+j > last
- || (mode == I2CDETECT_MODE_READ && !(funcs & I2C_FUNC_SMBUS_READ_BYTE))
- || (mode == I2CDETECT_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;
"can't set address to 0x%02x", i + j);
}
- switch (mode) {
+ switch (cmd) {
case I2CDETECT_MODE_READ:
/*
* This is known to lock SMBus on various
projects / oweals / busybox.git / blobdiff