dtbhtool: Split out dtimg components
Factor out DT image creation code into a small host
library.
Create a new host binary which allows us to create
device tree blob (DTB) images.
Change-Id: I5424684ad467b952df8b2ccf3afbacdec03e88c9
diff --git a/dtbhtool/mkdtbimg.c b/dtbhtool/mkdtbimg.c
new file mode 100644
index 0000000..d5fda12
--- /dev/null
+++ b/dtbhtool/mkdtbimg.c
@@ -0,0 +1,126 @@
+/* tools/mkbootimg/mkdtbimg.c
+**
+** Copyright 2016-2017, The LineageOS Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+**
+** December 2016, Christopher N. Hesse
+** Separate dt creation from mkbootimg program.
+**
+** January 2017, Christopher N. Hesse
+** Adjust to dtbToolCM call syntax.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <limits.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <assert.h>
+#include <dirent.h>
+#include <err.h>
+#include <stdint.h>
+
+#include <dtbimg.h>
+
+int usage(void)
+{
+ fprintf(stderr,"usage: mkdtimg\n"
+ " --dt_dir <dtb path>\n"
+ " -o|--output <filename>\n"
+ );
+ return 1;
+}
+
+
+
+int main(int argc, char **argv)
+{
+ char *dtimg = 0;
+ char *dt_dir = 0;
+ void *dt_data = 0;
+ unsigned pagesize = 0;
+ unsigned default_pagesize = 2048;
+ uint32_t dt_size;
+ int fd;
+ struct stat sbuf;
+
+ argc--;
+ argv++;
+
+ while(argc > 0){
+ char *arg = argv[0];
+ char *val = argv[1];
+ if(argc < 1) {
+ return usage();
+ }
+ argc -= 2;
+ argv += 2;
+ if(!strcmp(arg, "--output") || !strcmp(arg, "-o")) {
+ dtimg = val;
+ } else if (!strcmp(arg, "--dt_dir")) {
+ dt_dir = val;
+ } else if (!strcmp(arg, "-p")) {
+ // Ignore this parameter
+ } else if (!strcmp(arg, "-s")) {
+ pagesize = strtol(val, NULL, 10);
+ if (pagesize == 0)
+ pagesize = default_pagesize;
+ } else {
+ // Check if this is the dtb path
+ int err = stat(arg, &sbuf);
+ if (err != 0 || !S_ISDIR(sbuf.st_mode))
+ return usage();
+ dt_dir = arg;
+ }
+ }
+
+ if(dtimg == 0) {
+ fprintf(stderr,"error: no output filename specified\n");
+ return usage();
+ }
+
+ if(dt_dir == 0) {
+ fprintf(stderr,"error: no dtb path specified\n");
+ return usage();
+ }
+
+ dt_data = load_dtbh_block(dt_dir, pagesize, &dt_size);
+ if (dt_data == 0) {
+ fprintf(stderr, "error: could not load device tree blobs '%s'\n", dt_dir);
+ return 1;
+ }
+
+ fd = open(dtimg, O_CREAT | O_TRUNC | O_WRONLY, 0644);
+ if(fd < 0) {
+ fprintf(stderr,"error: could not create '%s'\n", dtimg);
+ return 1;
+ }
+
+ if(write(fd, dt_data, dt_size) != dt_size) goto fail;
+
+ return 0;
+
+fail:
+ unlink(dtimg);
+ close(fd);
+ fprintf(stderr,"error: failed writing '%s': %s\n", dtimg,
+ strerror(errno));
+ return 1;
+}