lsraw

3 files changed, 152 insertions, 1 deletions

diff --git a/GNUmakefile b/GNUmakefile
index 6cce4fc..6cea92a 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -7,7 +7,7 @@ CFLAGS	+= -DVERSION='"$(VERSION)"'
 
 # build
 TARGETS	:= input-events input-kbd input-send input-recv
-TARGETS	+= lsinput emulate-key lircd.conf
+TARGETS	+= lsinput lsraw emulate-key lircd.conf
 HEADERS	:= EV.h REL.h ABS.h MSC.h LED.h SND.h REP.h KEY.h BTN.h BUS.h SW.h
 
 # default target
@@ -26,6 +26,7 @@ lircd.conf: lirc.sh
 	sh lirc.sh $@
 
 lsinput: lsinput.o input.o
+lsraw: lsraw.o
 input-events: input-events.o input.o
 input-kbd: input-kbd.o input.o
 input-send: input-send.o input.o tcp.o
diff --git a/lsraw.c b/lsraw.c
new file mode 100644
index 0000000..90cb803
--- /dev/null
+++ b/lsraw.c
@@ -0,0 +1,146 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <sys/ioctl.h>
+#include <linux/hidraw.h>
+
+/* ------------------------------------------------------------------ */
+
+static const char *tag_map[4][16] = {
+    {
+        /* main */
+        [  8 ] = "input",
+        [  9 ] = "output",
+        [ 11 ] = "feature",
+        [ 10 ] = "collection",
+        [ 12 ] = "end",
+    },{
+        /* global */
+        [  0 ] = "usage page",
+        [  1 ] = "logical min",
+        [  2 ] = "logical max",
+        [  3 ] = "physical min",
+        [  4 ] = "physical max",
+        [  5 ] = "unit exponent",
+        [  6 ] = "unit",
+        [  7 ] = "report size",
+        [  8 ] = "report id",
+        [  9 ] = "report count",
+        [ 10 ] = "push",
+        [ 11 ] = "pop",
+    },{
+        /* local */
+        [  0 ] = "usage",
+        [  1 ] = "usage min",
+        [  2 ] = "usage max",
+        [  3 ] = "desig index",
+        [  4 ] = "desig min",
+        [  5 ] = "desig max",
+        [  7 ] = "string index",
+        [  8 ] = "string min",
+        [  9 ] = "string max",
+        [ 10 ] = "delimiter",
+    },{
+        /* reserved */
+    }
+};
+static const char *type_map[4] = {
+    "main", "global", "local", "reserved"
+};
+static const int size_map[4] = {
+    0, 1, 2, 4
+};
+
+static void print_report(unsigned char *desc, int descsize)
+{
+    unsigned data;
+    int tag, type, size, bytes;
+    int i, off = 0;
+
+    while (off < descsize) {
+        if (desc[off] == 0xfe) {
+            printf("TODO: long item\n");
+            return;
+        } else {
+            tag  = (desc[off] >> 4) & 0x0f;
+            type = (desc[off] >> 2) & 0x03;
+            size = (desc[off] >> 0) & 0x03;
+            printf("  %-16s %-6s %d  --",
+                   tag_map[type][tag] ?: "?",
+                   type_map[type],
+                   size_map[size]);
+
+            data = 0;
+            for (i = 0; i < size_map[size]; i++)
+                data |= desc[off + 1 + i] << (8 * i);
+            printf("  %8x  -- ", data);
+
+            bytes = size_map[size] + 1;
+            for (i = 0; i < bytes && off + i < descsize; i++)
+                printf(" %02x", desc[off+i]);
+            printf("\n");
+
+            off += bytes;
+        }
+    }
+}
+
+static int usage(char *prog, int error)
+{
+    fprintf(error ? stderr : stdout,
+            "usage: %s"
+            " [ -h ]\n",
+            prog);
+    exit(error);
+}
+
+int main(int argc, char *argv[])
+{
+    struct hidraw_report_descriptor desc;
+    int i, c, fd, rc, size;
+    char devname[32];
+
+    for (;;) {
+        if (-1 == (c = getopt(argc, argv, "hv")))
+            break;
+        switch (c) {
+        case 'h':
+            usage(argv[0], 0);
+        default:
+            usage(argv[0], 1);
+        }
+    }
+
+    for (i = 0; i < HIDRAW_MAX_DEVICES; i++) {
+        snprintf(devname, sizeof(devname), "/dev/hidraw%d", i);
+        fd = open(devname, O_RDWR);
+        if (fd < 0) {
+            if (errno != ENOENT) {
+                fprintf(stderr, "%s: %s\n", devname, strerror(errno));
+                continue;
+            } else {
+                break;
+            }
+        }
+
+        rc = ioctl(fd, HIDIOCGRDESCSIZE, &size);
+
+        desc.size = size;
+        rc = ioctl(fd, HIDIOCGRDESC, &desc);
+        if (rc < 0) {
+            fprintf(stderr, "%s: HIDIOCGRDESC: %s\n", devname, strerror(errno));
+            continue;
+        }
+        close(fd);
+
+        printf("%s (%d)\n", devname, size);
+        print_report(desc.value, size);
+    }
+
+    return 0;
+}
diff --git a/meson.build b/meson.build
index cee9bdf..d1c17b5 100644
--- a/meson.build
+++ b/meson.build
@@ -21,6 +21,10 @@ executable('lsinput',
            install : true)
 install_man('lsinput.8')
 
+executable('lsraw',
+           sources : [ 'lsraw.c', headers ],
+           install : true)
+
 executable('input-events',
            sources : [ 'input-events.c', 'input.c', headers ],
            install : true)