From b128f54d0daa749d301b99a6637f42aa35822a76 Mon Sep 17 00:00:00 2001
From: Doug Zongker <dougz@android.com>
Date: Thu, 18 Jun 2009 15:07:14 -0700
Subject: [PATCH] add function for device-specific wipe data features

Some devices want to do special things when recovery wipes data (eg,
wipe data in their baseband processor as well).  Add a hook in the
device-specific recovery library that gets called when data is wiped.

Also add an amend root for the "mbm" partition.
---
 default_recovery_ui.c | 4 ++++
 recovery.c            | 9 +++++++--
 recovery_ui.h         | 8 ++++++++
 roots.c               | 1 +
 4 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/default_recovery_ui.c b/default_recovery_ui.c
index 76fa43e..a2e4bea 100644
--- a/default_recovery_ui.c
+++ b/default_recovery_ui.c
@@ -59,3 +59,7 @@ int device_handle_key(int key_code, int visible) {
 int device_perform_action(int which) {
     return which;
 }
+
+int device_wipe_data() {
+    return 0;
+}
diff --git a/recovery.c b/recovery.c
index 8ad1339..499fda5 100644
--- a/recovery.c
+++ b/recovery.c
@@ -354,6 +354,7 @@ prompt_and_wait()
 
                 case ITEM_WIPE_DATA:
                     ui_print("\n-- Wiping data...\n");
+                    device_wipe_data();
                     erase_root("DATA:");
                     erase_root("CACHE:");
                     ui_print("Data wipe complete.\n");
@@ -463,10 +464,14 @@ main(int argc, char **argv)
     if (update_package != NULL) {
         status = install_package(update_package);
         if (status != INSTALL_SUCCESS) ui_print("Installation aborted.\n");
-    } else if (wipe_data || wipe_cache) {
-        if (wipe_data && erase_root("DATA:")) status = INSTALL_ERROR;
+    } else if (wipe_data) {
+        if (device_wipe_data()) status = INSTALL_ERROR;
+        if (erase_root("DATA:")) status = INSTALL_ERROR;
         if (wipe_cache && erase_root("CACHE:")) status = INSTALL_ERROR;
         if (status != INSTALL_SUCCESS) ui_print("Data wipe failed.\n");
+    } else if (wipe_cache) {
+        if (wipe_cache && erase_root("CACHE:")) status = INSTALL_ERROR;
+        if (status != INSTALL_SUCCESS) ui_print("Cache wipe failed.\n");
     } else {
         status = INSTALL_ERROR;  // No command specified
     }
diff --git a/recovery_ui.h b/recovery_ui.h
index 86f540b..671fe40 100644
--- a/recovery_ui.h
+++ b/recovery_ui.h
@@ -48,6 +48,14 @@ extern int device_handle_key(int key, int visible);
 // information to the screen.
 extern int device_perform_action(int which);
 
+// Called when we do a wipe data/factory reset operation (either via a
+// reboot from the main system with the --wipe_data flag, or when the
+// user boots into recovery manually and selects the option from the
+// menu.)  Can perform whatever device-specific wiping actions are
+// needed.  Return 0 on success.  The userdata and cache partitions
+// are erased after this returns (whether it returns success or not).
+int device_wipe_data();
+
 #define NO_ACTION           -1
 
 #define HIGHLIGHT_UP        -2
diff --git a/roots.c b/roots.c
index 6a6cf8a..8f8dace 100644
--- a/roots.c
+++ b/roots.c
@@ -52,6 +52,7 @@ static RootInfo g_roots[] = {
     { "RECOVERY:", g_mtd_device, NULL, "recovery", "/", g_raw },
     { "SDCARD:", "/dev/block/mmcblk0p1", "/dev/block/mmcblk0", NULL, "/sdcard", "vfat" },
     { "SYSTEM:", g_mtd_device, NULL, "system", "/system", "yaffs2" },
+    { "MBM:", g_mtd_device, NULL, "mbm", NULL, g_raw },
     { "TMP:", NULL, NULL, NULL, "/tmp", NULL },
 };
 #define NUM_ROOTS (sizeof(g_roots) / sizeof(g_roots[0]))