Initial commitHEADsubmit/tizen_common/20150126.093738submit/tizen_3.0_common/20161104.104000submit/2.0alpha/20130201.222745accepted/tizen/common/20150126.100451accepted/tizen/3.0/common/20161114.112238accepted/2.0alpha/20130201.222208tizen_3.0.m2tizen_3.0.2015.q2_commontizen_3.0.2014.q4_commonaccepted/tizen_commonaccepted/tizen_3.0_common2.0alpha

1 files changed, 357 insertions, 0 deletions

diff --git a/tools/i2cdetect.c b/tools/i2cdetect.c
new file mode 100644
index 0000000..4750db5
--- /dev/null
+++ b/tools/i2cdetect.c
@@ -0,0 +1,357 @@
+/*
+    i2cdetect.c - a user-space program to scan for I2C devices
+    Copyright (C) 1999-2004  Frodo Looijaard <frodol@dds.nl>,
+                             Mark D. Studebaker <mdsxyz123@yahoo.com> and
+                             Jean Delvare <khali@linux-fr.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+    MA 02110-1301 USA.
+*/
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <linux/i2c-dev.h>
+#include "i2cbusses.h"
+#include "../version.h"
+
+#define MODE_AUTO	0
+#define MODE_QUICK	1
+#define MODE_READ	2
+#define MODE_FUNC	3
+
+static void help(void)
+{
+	fprintf(stderr,
+		"Usage: i2cdetect [-y] [-a] [-q|-r] I2CBUS [FIRST LAST]\n"
+		"       i2cdetect -F I2CBUS\n"
+		"       i2cdetect -l\n"
+		"  I2CBUS is an integer or an I2C bus name\n"
+		"  If provided, FIRST and LAST limit the probing range.\n");
+}
+
+static int scan_i2c_bus(int file, int mode, int first, int last)
+{
+	int i, j;
+	int res;
+
+	printf("     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f\n");
+
+	for (i = 0; i < 128; i += 16) {
+		printf("%02x: ", i);
+		for(j = 0; j < 16; j++) {
+			fflush(stdout);
+
+			/* Skip unwanted addresses */
+			if (i+j < first || i+j > last) {
+				printf("   ");
+				continue;
+			}
+
+			/* Set slave address */
+			if (ioctl(file, I2C_SLAVE, i+j) < 0) {
+				if (errno == EBUSY) {
+					printf("UU ");
+					continue;
+				} else {
+					fprintf(stderr, "Error: Could not set "
+						"address to 0x%02x: %s\n", i+j,
+						strerror(errno));
+					return -1;
+				}
+			}
+
+			/* Probe this address */
+			switch (mode) {
+			case MODE_QUICK:
+				/* This is known to corrupt the Atmel AT24RF08
+				   EEPROM */
+				res = i2c_smbus_write_quick(file,
+				      I2C_SMBUS_WRITE);
+				break;
+			case MODE_READ:
+				/* This is known to lock SMBus on various
+				   write-only chips (mainly clock chips) */
+				res = i2c_smbus_read_byte(file);
+				break;
+			default:
+				if ((i+j >= 0x30 && i+j <= 0x37)
+				 || (i+j >= 0x50 && i+j <= 0x5F))
+					res = i2c_smbus_read_byte(file);
+				else
+					res = i2c_smbus_write_quick(file,
+					      I2C_SMBUS_WRITE);
+			}
+
+			if (res < 0)
+				printf("-- ");
+			else
+				printf("%02x ", i+j);
+		}
+		printf("\n");
+	}
+
+	return 0;
+}
+
+struct func
+{
+	long value;
+	const char* name;
+};
+
+static const struct func all_func[] = {
+	{ .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 = "" }
+};
+
+static void print_functionality(unsigned long funcs)
+{
+	int i;
+
+	for (i = 0; all_func[i].value; i++) {
+		printf("%-32s %s\n", all_func[i].name,
+		       (funcs & all_func[i].value) ? "yes" : "no");
+	}
+}
+
+/*
+ * Print the installed i2c busses. The format is those of Linux 2.4's
+ * /proc/bus/i2c for historical compatibility reasons.
+ */
+static void print_i2c_busses(void)
+{
+	struct i2c_adap *adapters;
+	int count;
+
+	adapters = gather_i2c_busses();
+	if (adapters == NULL) {
+		fprintf(stderr, "Error: Out of memory!\n");
+		return;
+	}
+
+	for (count = 0; adapters[count].name; count++) {
+		printf("i2c-%d\t%-10s\t%-32s\t%s\n",
+			adapters[count].nr, adapters[count].funcs,
+			adapters[count].name, adapters[count].algo);
+	}
+
+	free_adapters(adapters);
+}
+
+int main(int argc, char *argv[])
+{
+	char *end;
+	int i2cbus, file, res;
+	char filename[20];
+	unsigned long funcs;
+	int mode = MODE_AUTO;
+	int first = 0x03, last = 0x77;
+	int flags = 0;
+	int yes = 0, version = 0, list = 0;
+
+	/* handle (optional) flags first */
+	while (1+flags < argc && argv[1+flags][0] == '-') {
+		switch (argv[1+flags][1]) {
+		case 'V': version = 1; break;
+		case 'y': yes = 1; break;
+		case 'l': list = 1; break;
+		case 'F':
+			if (mode != MODE_AUTO && mode != MODE_FUNC) {
+				fprintf(stderr, "Error: Different modes "
+					"specified!\n");
+				exit(1);
+			}
+			mode = MODE_FUNC;
+			break;
+		case 'r':
+			if (mode == MODE_QUICK) {
+				fprintf(stderr, "Error: Different modes "
+					"specified!\n");
+				exit(1);
+			}
+			mode = MODE_READ;
+			break;
+		case 'q':
+			if (mode == MODE_READ) {
+				fprintf(stderr, "Error: Different modes "
+					"specified!\n");
+				exit(1);
+			}
+			mode = MODE_QUICK;
+			break;
+		case 'a':
+			first = 0x00;
+			last = 0x7F;
+			break;
+		default:
+			fprintf(stderr, "Error: Unsupported option "
+				"\"%s\"!\n", argv[1+flags]);
+			help();
+			exit(1);
+		}
+		flags++;
+	}
+
+	if (version) {
+		fprintf(stderr, "i2cdetect version %s\n", VERSION);
+		exit(0);
+	}
+
+	if (list) {
+		print_i2c_busses();
+		exit(0);
+	}
+
+	if (argc < flags + 2) {
+		fprintf(stderr, "Error: No i2c-bus specified!\n");
+		help();
+		exit(1);
+	}
+	i2cbus = lookup_i2c_bus(argv[flags+1]);
+	if (i2cbus < 0) {
+		help();
+		exit(1);
+	}
+
+	/* read address range if present */
+	if (argc == flags + 4 && mode != MODE_FUNC) {
+		int tmp;
+
+		tmp = strtol(argv[flags+2], &end, 0);
+		if (*end) {
+			fprintf(stderr, "Error: FIRST argment not a "
+				"number!\n");
+			help();
+			exit(1);
+		}
+		if (tmp < first || tmp > last) {
+			fprintf(stderr, "Error: FIRST argument out of range "
+				"(0x%02x-0x%02x)!\n", first, last);
+			help();
+			exit(1);
+		}
+		first = tmp;
+
+		tmp = strtol(argv[flags+3], &end, 0);
+		if (*end) {
+			fprintf(stderr, "Error: LAST argment not a "
+				"number!\n");
+			help();
+			exit(1);
+		}
+		if (tmp < first || tmp > last) {
+			fprintf(stderr, "Error: LAST argument out of range "
+				"(0x%02x-0x%02x)!\n", first, last);
+			help();
+			exit(1);
+		}
+		last = tmp;
+	} else if (argc != flags + 2) {
+		help();
+		exit(1);
+	}
+
+	file = open_i2c_dev(i2cbus, filename, 0);
+	if (file < 0) {
+		exit(1);
+	}
+
+	if (ioctl(file, I2C_FUNCS, &funcs) < 0) {
+		fprintf(stderr, "Error: Could not get the adapter "
+			"functionality matrix: %s\n", strerror(errno));
+		close(file);
+		exit(1);
+	}
+
+	/* Special case, we only list the implemented functionalities */
+	if (mode == MODE_FUNC) {
+		close(file);
+		printf("Functionalities implemented by %s:\n", filename);
+		print_functionality(funcs);
+		exit(0);
+	}
+
+	if (mode != MODE_READ && !(funcs & I2C_FUNC_SMBUS_QUICK)) {
+		fprintf(stderr, "Error: Can't use SMBus Quick Write command "
+			"on this bus (ISA bus?)\n");
+		close(file);
+		exit(1);
+	}
+	if (mode != MODE_QUICK && !(funcs & I2C_FUNC_SMBUS_READ_BYTE)) {
+		fprintf(stderr, "Error: Can't use SMBus Read Byte command "
+			"on this bus (ISA bus?)\n");
+		close(file);
+		exit(1);
+	}
+
+	if (!yes) {
+		char s[2];
+
+		fprintf(stderr, "WARNING! This program can confuse your I2C "
+			"bus, cause data loss and worse!\n");
+
+		fprintf(stderr, "I will probe file %s%s.\n", filename,
+			mode==MODE_QUICK?" using quick write commands":
+			mode==MODE_READ?" using read byte commands":"");
+		fprintf(stderr, "I will probe address range 0x%02x-0x%02x.\n",
+			first, last);
+
+		fprintf(stderr, "Continue? [Y/n] ");
+		fflush(stderr);
+		if (!fgets(s, 2, stdin)
+		 || (s[0] != '\n' && s[0] != 'y' && s[0] != 'Y')) {
+			fprintf(stderr, "Aborting on user request.\n");
+			exit(0);
+		}
+	}
+
+	res = scan_i2c_bus(file, mode, first, last);
+
+	close(file);
+
+	exit(res?1:0);
+}