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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <linux/input.h>
     18 #include <sys/stat.h>
     19 #include <errno.h>
     20 #include <string.h>
     21 
     22 #include "recovery_ui.h"
     23 #include "common.h"
     24 
     25 char* MENU_HEADERS[] = { "Volume up/down to move highlight;",
     26                          "power button to select.",
     27                          "",
     28                          NULL };
     29 
     30 char* MENU_ITEMS[] = { "reboot system now",
     31                        "apply update from /sdcard",
     32                        "wipe data/factory reset",
     33                        "wipe cache partition",
     34                        NULL };
     35 
     36 int device_recovery_start() {
     37     // recovery can get started before the kernel has created the EMMC
     38     // devices, which will make the wipe_data operation fail (trying
     39     // to open a device that doesn't exist).  Hold up the start of
     40     // recovery for up to 5 seconds waiting for the userdata partition
     41     // block device to exist.
     42 
     43     const char* fn = "/dev/block/platform/s3c-sdhci.0/by-name/userdata";
     44 
     45     int tries = 0;
     46     int ret;
     47     struct stat buf;
     48     do {
     49         ++tries;
     50         ret = stat(fn, &buf);
     51         if (ret) {
     52             printf("try %d: %s\n", tries, strerror(errno));
     53             sleep(1);
     54         }
     55     } while (ret && tries < 5);
     56     if (!ret) {
     57         printf("stat() of %s succeeded on try %d\n", fn, tries);
     58     } else {
     59         printf("failed to stat %s\n", fn);
     60     }
     61 
     62     // We let recovery attempt to carry on even if the stat never
     63     // succeeded.
     64 
     65     return 0;
     66 }
     67 
     68 int device_toggle_display(volatile char* key_pressed, int key_code) {
     69     // hold power and press volume-up
     70     return key_pressed[KEY_POWER] && key_code == KEY_VOLUMEUP;
     71 }
     72 
     73 int device_reboot_now(volatile char* key_pressed, int key_code) {
     74     // Reboot if the power key is pressed five times in a row, with
     75     // no other keys in between.
     76     static int presses = 0;
     77     if (key_code == KEY_POWER) {   // power button
     78         ++presses;
     79         return presses == 5;
     80     } else {
     81         presses = 0;
     82         return 0;
     83     }
     84 }
     85 
     86 int device_handle_key(int key_code, int visible) {
     87     if (visible) {
     88         switch (key_code) {
     89             case KEY_DOWN:
     90             case KEY_VOLUMEDOWN:
     91                 return HIGHLIGHT_DOWN;
     92 
     93             case KEY_UP:
     94             case KEY_VOLUMEUP:
     95                 return HIGHLIGHT_UP;
     96 
     97             case KEY_ENTER:
     98             case KEY_POWER:   // crespo power
     99                 return SELECT_ITEM;
    100         }
    101     }
    102 
    103     return NO_ACTION;
    104 }
    105 
    106 int device_perform_action(int which) {
    107     return which;
    108 }
    109 
    110 int device_wipe_data() {
    111     return 0;
    112 }
    113