Merge "Dump the HID descriptor when available." (2d3205d2) · Commits · e / os / android_system_core

toolbox/getevent.c

+47 −4

Original line number	Diff line number	Diff line
		@@ -25,8 +25,9 @@ enum {
		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_event(int type, int code, int value, int print_flags)
		}
		}

		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 @@ static int open_device(const char *device, int print_flags)
		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 int scan_dir(const char *dirname, int print_flags)

		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 @@ int getevent_main(int argc, char *argv[])

		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 @@ int getevent_main(int argc, char *argv[])
		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;