Initial modemloader service

Change-Id: Icef590f4af8032cb06dc2554c6c64d9db48b7c83

Android.mk

@@ -38,3 +38,7 @@ endif
 ifeq ($(BOARD_VENDOR),samsung)
 include $(SAM_ROOT)/ril/Android.mk
 endif
+
+ifneq ($(filter xmm6260 xmm6262 xmm6360 xmm7260 m7450,$(BOARD_MODEM_TYPE)),)
+include $(SAM_ROOT)/modemloader/Android.mk
+endif

modemloader/Android.mk

@@ -0,0 +1,26 @@
+# Copyright (C) 2015 The CyanogenMod 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.
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := modemloader.c
+
+LOCAL_SHARED_LIBRARIES := liblog libcutils
+
+LOCAL_MODULE := modemloader
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_EXECUTABLE)

modemloader/modemloader.c

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * Copyright (C) 2015 Christopher N. Hesse <raymanfx@gmail.com>
+ *
+ * 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.
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/un.h>
+
+#include <cutils/properties.h>
+#include <cutils/log.h>
+
+#define LOG_TAG "modemloader"
+#define LOG_NDEBUG 0
+
+void parse_hardware_revision(unsigned int *revision)
+{
+    const char *cpuinfo = "/proc/cpuinfo";
+    char *data = NULL;
+    size_t len = 0, limit = 1024;
+    int fd, n;
+    char *x, *rev;
+
+    fd = open(cpuinfo, O_RDONLY);
+    if (fd < 0) return;
+
+    for (;;) {
+        x = (char*)realloc(data, limit);
+        if (!x) {
+            ALOGE("Failed to allocate memory to read %s\n", cpuinfo);
+            goto done;
+        }
+        data = x;
+
+        n = read(fd, data + len, limit - len);
+        if (n < 0) {
+            ALOGE("Failed reading %s: %s (%d)\n", cpuinfo, strerror(errno), errno);
+            goto done;
+        }
+        len += n;
+
+        if (len < limit)
+            break;
+
+        /* We filled the buffer, so increase size and loop to read more */
+        limit *= 2;
+    }
+
+    data[len] = 0;
+    rev = strstr(data, "\nRevision");
+
+    if (rev) {
+        x = strstr(rev, ": ");
+        if (x) {
+            *revision = strtoul(x + 2, 0, 16);
+        }
+    }
+
+done:
+    close(fd);
+    free(data);
+}
+
+int main(void)
+{
+    unsigned int revision = 0;
+    char ro_revision[PROP_VALUE_MAX];
+
+    parse_hardware_revision(&revision);
+    snprintf(ro_revision, PROP_VALUE_MAX, "%d", revision);
+    property_set("ro.revision", ro_revision);
+
+    return 0;
+}