*/
//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))
*/
#include "libbb.h"
+#include "common_bufsiz.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>
+#include <linux/i2c-dev.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. */
-struct i2c_smbus_ioctl_data {
- uint8_t read_write;
- uint8_t command;
- uint32_t 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];
-};
-
-#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)
+#define I2CDETECT_MODE_AUTO 0
+#define I2CDETECT_MODE_QUICK 1
+#define I2CDETECT_MODE_READ 2
/*
* This is needed for ioctl_or_perror_and_die() since it only accepts pointers.
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
sprintf(filename, "/dev/i2c-%d", i2cbus);
fd = open(filename, O_RDWR);
if (fd < 0) {
- filename[8] = '/'; /* change to "/dev/i2c/%d" */
- fd = xopen(filename, O_RDWR);
+ 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;
}
-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)
{
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 (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:#define i2cdump_full_usage "\n\n"
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);
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':
bb_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:
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_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
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 */
- "-1:?3"; /* from 1 to 3 args */
+ "?3"; /* up to 3 args */
opts = getopt32(argv, optstr);
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_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;
+ }
+
+ bb_perror_msg_and_die(
+ "can't set address to 0x%02x", i + j);
+ }
- switch (mode) {
- case DETECT_MODE_READ:
+ 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;
projects / oweals / busybox.git / blobdiff