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      1 /*
      2  * Copyright (C) 2011 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 /cache",
     32                        "wipe data/factory reset",
     33                        "wipe cache partition",
     34                        NULL };
     35 
     36 void device_ui_init(UIParameters* ui_parameters) {
     37 }
     38 
     39 int device_recovery_start() {
     40     // recovery can get started before the kernel has created the EMMC
     41     // devices, which will make the wipe_data operation fail (trying
     42     // to open a device that doesn't exist).  Hold up the start of
     43     // recovery for up to 5 seconds waiting for the userdata partition
     44     // block device to exist.
     45 
     46     const char* fn = "/dev/block/platform/omap/omap_hsmmc.0/by-name/userdata";
     47 
     48     int tries = 0;
     49     int ret;
     50     struct stat buf;
     51     do {
     52         ++tries;
     53         ret = stat(fn, &buf);
     54         if (ret) {
     55             printf("try %d: %s\n", tries, strerror(errno));
     56             sleep(1);
     57         }
     58     } while (ret && tries < 5);
     59     if (!ret) {
     60         printf("stat() of %s succeeded on try %d\n", fn, tries);
     61     } else {
     62         printf("failed to stat %s\n", fn);
     63     }
     64 
     65     // We let recovery attempt to carry on even if the stat never
     66     // succeeded.
     67 
     68     return 0;
     69 }
     70 
     71 int device_toggle_display(volatile char* key_pressed, int key_code) {
     72     // hold power and press volume-up
     73     return key_pressed[KEY_POWER] && key_code == KEY_VOLUMEUP;
     74 }
     75 
     76 int device_reboot_now(volatile char* key_pressed, int key_code) {
     77     // Reboot if the power key is pressed five times in a row, with
     78     // no other keys in between.
     79     static int presses = 0;
     80     if (key_code == KEY_POWER) {   // power button
     81         ++presses;
     82         return presses == 5;
     83     } else {
     84         presses = 0;
     85         return 0;
     86     }
     87 }
     88 
     89 int device_handle_key(int key_code, int visible) {
     90     if (visible) {
     91         switch (key_code) {
     92             case KEY_DOWN:
     93             case KEY_VOLUMEDOWN:
     94                 return HIGHLIGHT_DOWN;
     95 
     96             case KEY_UP:
     97             case KEY_VOLUMEUP:
     98                 return HIGHLIGHT_UP;
     99 
    100             case KEY_ENTER:
    101             case KEY_POWER:   // crespo power
    102                 return SELECT_ITEM;
    103         }
    104     }
    105 
    106     return NO_ACTION;
    107 }
    108 
    109 int device_perform_action(int which) {
    110     return which == 1 ? ITEM_APPLY_CACHE : which;
    111 }
    112 
    113 int device_wipe_data() {
    114     return 0;
    115 }
    116