1 files changed, 50 insertions, 19 deletions

diff --git a/init/init.cpp b/init/init.cpp
index 41ceb0a..ddd6223 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -31,6 +31,9 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/un.h>
+#include <dirent.h>
+
+#include <memory>
 
 #include <selinux/selinux.h>
 #include <selinux/label.h>
@@ -45,6 +48,8 @@
 #include <cutils/fs.h>
 #include <private/android_filesystem_config.h>
 #include <termios.h>
+#include <utils/file.h>
+#include <utils/stringprintf.h>
 
 #include "devices.h"
 #include "init.h"
@@ -65,8 +70,6 @@ static int property_triggers_enabled = 0;
 
 static char console[32];
 static char bootmode[32];
-static char hardware[32];
-static unsigned revision = 0;
 static char qemu[32];
 
 static struct action *cur_action = NULL;
@@ -764,6 +767,8 @@ static void export_kernel_boot_props(void)
         { "ro.boot.mode", "ro.bootmode", "unknown", },
         { "ro.boot.baseband", "ro.baseband", "unknown", },
         { "ro.boot.bootloader", "ro.bootloader", "unknown", },
+        { "ro.boot.hardware", "ro.hardware", "unknown", },
+        { "ro.boot.revision", "ro.revision", "0", },
     };
 
     for (i = 0; i < ARRAY_SIZE(prop_map); i++) {
@@ -782,16 +787,6 @@ static void export_kernel_boot_props(void)
     property_get("ro.bootmode", tmp);
     strlcpy(bootmode, tmp, sizeof(bootmode));
 
-    /* if this was given on kernel command line, override what we read
-     * before (e.g. from /proc/cpuinfo), if anything */
-    ret = property_get("ro.boot.hardware", tmp);
-    if (ret)
-        strlcpy(hardware, tmp, sizeof(hardware));
-    property_set("ro.hardware", hardware);
-
-    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
-    property_set("ro.revision", tmp);
-
     /* TODO: these are obsolete. We should delete them */
     if (!strcmp(bootmode,"factory"))
         property_set("ro.factorytest", "1");
@@ -801,6 +796,40 @@ static void export_kernel_boot_props(void)
         property_set("ro.factorytest", "0");
 }
 
+static void process_kernel_dt(void)
+{
+    static const char android_dir[] = "/proc/device-tree/firmware/android";
+
+    std::string file_name = android::StringPrintf("%s/compatible", android_dir);
+
+    std::string dt_file;
+    android::ReadFileToString(file_name, &dt_file);
+    if (!dt_file.compare("android,firmware")) {
+        ERROR("firmware/android is not compatible with 'android,firmware'\n");
+        return;
+    }
+
+    std::unique_ptr<DIR, int(*)(DIR*)>dir(opendir(android_dir), closedir);
+    if (!dir)
+        return;
+
+    struct dirent *dp;
+    while ((dp = readdir(dir.get())) != NULL) {
+        if (dp->d_type != DT_REG || !strcmp(dp->d_name, "compatible"))
+            continue;
+
+        file_name = android::StringPrintf("%s/%s", android_dir, dp->d_name);
+
+        android::ReadFileToString(file_name, &dt_file);
+        std::replace(dt_file.begin(), dt_file.end(), ',', '.');
+
+        std::string property_name = android::StringPrintf("ro.boot.%s", dp->d_name);
+        if (property_set(property_name.c_str(), dt_file.c_str())) {
+            ERROR("Could not set property %s to value %s", property_name.c_str(), dt_file.c_str());
+        }
+    }
+}
+
 static void process_kernel_cmdline(void)
 {
     /* don't expose the raw commandline to nonpriv processes */
@@ -813,11 +842,6 @@ static void process_kernel_cmdline(void)
     import_kernel_cmdline(0, import_kernel_nv);
     if (qemu[0])
         import_kernel_cmdline(1, import_kernel_nv);
-
-    /* now propogate the info given on command line to internal variables
-     * used by init as well as the current required properties
-     */
-    export_kernel_boot_props();
 }
 
 static int property_service_init_action(int nargs, char **args)
@@ -1015,10 +1039,17 @@ int main(int argc, char **argv)
     klog_init();
     property_init();
 
-    get_hardware_name(hardware, &revision);
-
+    process_kernel_dt();
+    /* in case one is passing arguments both on the command line and in DT
+     * Properties set in DT always have priority over the command-line ones
+     */
     process_kernel_cmdline();
 
+    /* now propogate the kernel variables to internal variables
+     * used by init as well as the current required properties
+     */
+    export_kernel_boot_props();
+
     union selinux_callback cb;
     cb.func_log = log_callback;
     selinux_set_callback(SELINUX_CB_LOG, cb);