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Commit 4ac87154 authored by Jeff Brown's avatar Jeff Brown
Browse files

Dump the HID descriptor when available. 

Also, always print the input properties when -p is
specified.

Change-Id: Ibacb6dd26ccab68c85b76928df60fdc2a53c198c
parent 51009161

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;