Dump the HID descriptor when available.
Also, always print the input properties when -p is
specified.
Change-Id: Ibacb6dd26ccab68c85b76928df60fdc2a53c198c
diff --git a/toolbox/getevent.c b/toolbox/getevent.c
index c0ac94a..e3ab41a 100644
--- a/toolbox/getevent.c
+++ b/toolbox/getevent.c
@@ -25,8 +25,9 @@
PRINT_VERSION = 1U << 4,
PRINT_POSSIBLE_EVENTS = 1U << 5,
PRINT_INPUT_PROPS = 1U << 6,
+ PRINT_HID_DESCRIPTOR = 1U << 7,
- PRINT_ALL_INFO = (1U << 7) - 1,
+ PRINT_ALL_INFO = (1U << 8) - 1,
PRINT_LABELS = 1U << 16,
};
@@ -254,6 +255,40 @@
}
}
+static void print_hid_descriptor(int bus, int vendor, int product)
+{
+ const char *dirname = "/sys/kernel/debug/hid";
+ char prefix[16];
+ DIR *dir;
+ struct dirent *de;
+ char filename[PATH_MAX];
+ FILE *file;
+ char line[2048];
+
+ snprintf(prefix, sizeof(prefix), "%04X:%04X:%04X.", bus, vendor, product);
+
+ dir = opendir(dirname);
+ if(dir == NULL)
+ return;
+ while((de = readdir(dir))) {
+ if (strstr(de->d_name, prefix) == de->d_name) {
+ snprintf(filename, sizeof(filename), "%s/%s/rdesc", dirname, de->d_name);
+
+ file = fopen(filename, "r");
+ if (file) {
+ printf(" HID descriptor: %s\n\n", de->d_name);
+ while (fgets(line, sizeof(line), file)) {
+ fputs(" ", stdout);
+ fputs(line, stdout);
+ }
+ fclose(file);
+ puts("");
+ }
+ }
+ }
+ closedir(dir);
+}
+
static int open_device(const char *device, int print_flags)
{
int version;
@@ -335,6 +370,9 @@
if(print_flags & PRINT_INPUT_PROPS) {
print_input_props(fd);
}
+ if(print_flags & PRINT_HID_DESCRIPTOR) {
+ print_hid_descriptor(id.bustype, id.vendor, id.product);
+ }
ufds[nfds].fd = fd;
ufds[nfds].events = POLLIN;
@@ -432,12 +470,13 @@
static void usage(int argc, char *argv[])
{
- fprintf(stderr, "Usage: %s [-t] [-n] [-s switchmask] [-S] [-v [mask]] [-p] [-i] [-l] [-q] [-c count] [-r] [device]\n", argv[0]);
+ fprintf(stderr, "Usage: %s [-t] [-n] [-s switchmask] [-S] [-v [mask]] [-d] [-p] [-i] [-l] [-q] [-c count] [-r] [device]\n", argv[0]);
fprintf(stderr, " -t: show time stamps\n");
fprintf(stderr, " -n: don't print newlines\n");
fprintf(stderr, " -s: print switch states for given bits\n");
fprintf(stderr, " -S: print all switch states\n");
fprintf(stderr, " -v: verbosity mask (errs=1, dev=2, name=4, info=8, vers=16, pos. events=32, props=64)\n");
+ fprintf(stderr, " -d: show HID descriptor, if available\n");
fprintf(stderr, " -p: show possible events (errs, dev, name, pos. events)\n");
fprintf(stderr, " -i: show all device info and possible events\n");
fprintf(stderr, " -l: label event types and names in plain text\n");
@@ -469,7 +508,7 @@
opterr = 0;
do {
- c = getopt(argc, argv, "tns:Sv::pilqc:rh");
+ c = getopt(argc, argv, "tns:Sv::dpilqc:rh");
if (c == EOF)
break;
switch (c) {
@@ -496,8 +535,12 @@
print_flags |= PRINT_DEVICE | PRINT_DEVICE_NAME | PRINT_DEVICE_INFO | PRINT_VERSION;
print_flags_set = 1;
break;
+ case 'd':
+ print_flags |= PRINT_HID_DESCRIPTOR;
+ break;
case 'p':
- print_flags |= PRINT_DEVICE_ERRORS | PRINT_DEVICE | PRINT_DEVICE_NAME | PRINT_POSSIBLE_EVENTS;
+ print_flags |= PRINT_DEVICE_ERRORS | PRINT_DEVICE
+ | PRINT_DEVICE_NAME | PRINT_POSSIBLE_EVENTS | PRINT_INPUT_PROPS;
print_flags_set = 1;
if(dont_block == -1)
dont_block = 1;