From Jérôme Duval <jerome.duval@xxxxxxxxx>:
Jérôme Duval has uploaded this change for review. (
https://review.haiku-os.org/c/haiku/+/2459 ;)
Change subject: i2c: add diagnostic utility
......................................................................
i2c: add diagnostic utility
---
M src/bin/Jamfile
A src/bin/i2c/Jamfile
A src/bin/i2c/i2c.cpp
3 files changed, 113 insertions(+), 0 deletions(-)
git pull ssh://git.haiku-os.org:22/haiku refs/changes/59/2459/1
diff --git a/src/bin/Jamfile b/src/bin/Jamfile
index b21968c..64cdd49 100644
--- a/src/bin/Jamfile
+++ b/src/bin/Jamfile
@@ -251,6 +251,7 @@
SubInclude HAIKU_TOP src bin desklink ;
SubInclude HAIKU_TOP src bin fwcontrol ;
SubInclude HAIKU_TOP src bin hid_decode ;
+SubInclude HAIKU_TOP src bin i2c ;
SubInclude HAIKU_TOP src bin keymap ;
SubInclude HAIKU_TOP src bin keystore ;
SubInclude HAIKU_TOP src bin listdev ;
diff --git a/src/bin/i2c/Jamfile b/src/bin/i2c/Jamfile
new file mode 100644
index 0000000..49b5a5d
--- /dev/null
+++ b/src/bin/i2c/Jamfile
@@ -0,0 +1,7 @@
+SubDir HAIKU_TOP src bin i2c ;
+
+UsePrivateHeaders i2c shared ;
+
+BinCommand <bin>i2c :
+ i2c.cpp
+;
diff --git a/src/bin/i2c/i2c.cpp b/src/bin/i2c/i2c.cpp
new file mode 100644
index 0000000..6b4c7c0
--- /dev/null
+++ b/src/bin/i2c/i2c.cpp
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2020, Jérôme Duval, jerome.duval@xxxxxxxxx.
+ * Distributed under the terms of the MIT license.
+ */
+
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <Drivers.h>
+
+#include <AutoDeleter.h>
+
+#include "i2c.h"
+
+
+static struct option const kLongOptions[] = {
+ {"help", no_argument, 0, 'h'},
+ {NULL}
+};
+
+
+extern const char *__progname;
+static const char *kProgramName = __progname;
+
+
+void
+usage(int returnValue)
+{
+ fprintf(stderr, "Usage: %s <path-to-i2c-bus-device>\n", kProgramName);
+ exit(returnValue);
+}
+
+
+static int
+scan_bus(const char *path)
+{
+ int err = EXIT_SUCCESS;
+ int fd = open(path, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "%s: Could not access path: %s\n", kProgramName,
+ strerror(errno));
+ return EXIT_FAILURE;
+ }
+
+ setbuf(stdout, NULL);
+ printf("Scanning I2C bus: %s\n", path);
+ FileDescriptorCloser closer(fd);
+
+ printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\n");
+ for (int i = 0; i < 128; i+=16) {
+ printf("%02x: ", i);
+ for (int j = 0; j < 16; j++) {
+ uint16 addr = i + j;
+ uint8 cmd = 0;
+ uint8 data = 0;
+ i2c_ioctl_exec exec;
+ exec.addr = addr;
+ exec.op = I2C_OP_READ_STOP;
+ exec.cmdBuffer = &cmd;
+ exec.cmdLength = sizeof(cmd);
+ exec.buffer = &data;
+ exec.bufferLength = sizeof(data);
+ if (ioctl(fd, I2CEXEC, &exec, sizeof(exec)) == 0)
+ printf("%02x ", addr);
+ else
+ printf("-- ");
+ }
+ printf("\n");
+ }
+
+ close(fd);
+
+ return err;
+}
+
+
+int
+main(int argc, char** argv)
+{
+ int c;
+ while ((c = getopt_long(argc, argv, "h", kLongOptions, NULL)) != -1) {
+ switch (c) {
+ case 0:
+ break;
+ case 'h':
+ usage(0);
+ break;
+ default:
+ usage(1);
+ break;
+ }
+ }
+
+ if (argc - optind < 1)
+ usage(1);
+ const char* path = argv[optind++];
+
+ exit(scan_bus(path));
+}
--
To view, visit https://review.haiku-os.org/c/haiku/+/2459
To unsubscribe, or for help writing mail filters, visit
https://review.haiku-os.org/settings
Gerrit-Project: haiku
Gerrit-Branch: master
Gerrit-Change-Id: I7e87457ff6e4210e256f9e41e5555e2d0e1ba20d
Gerrit-Change-Number: 2459
Gerrit-PatchSet: 1
Gerrit-Owner: Jérôme Duval <jerome.duval@xxxxxxxxx>
Gerrit-MessageType: newchange
