高通平台 按键 进入 fastboot/recovery/edl 模式

在大多数高通平台上，默认都提供以下的按键功能：

1. 按住 vol+ 键开机，进入 recovery 模式。
2. 按住 vol- 键开机，进入 fastboot 模式。
3. 按住 vol+ 键及 vol- 键开机，进入 edl（Emergency Download）模式。

高通方案的Android设备主要有以下几种开机模式，Android、EDL、Fastboot、Recovery和FFBM，其进入及退出的方式如下表。

refs:

https://nihil.cc/posts/qualcomm_edl_key/

https://www.cnblogs.com/schips/p/ways_to_enter_debug_mode_in_qualcoom_android_device.html

https://blog.csdn.net/jinron10/article/details/104691123

fastboot 刷机脚本：flash-all.sh

https://gist.github.com/Lomeli12/73825a287d3cf60414e244aece9b6bdf

#!/bin/bash
reset
set +x
echo "------- LE2117 to LE2115 Conversion Bash Script by Lomeli12@xda -------"
echo "Please make sure you are in bootloader, your screen should say \"Fastboot Mode\" in red."
echo "You should be using the latest Google platform tools from your system's package manager (Apt, Yay, Brew, Scoop, etc)."
echo -e "Do not continue if you are unsure. \n"

# Make sure the user knows the risk and wants to continue
while true; do
    read -p "Are you SURE you want to continue? Your warranty will be void and there's always the possibility you can soft-brick your phone (Y/N) " yn
    case $yn in
        [Yy]* ) 
            break
            ;;
        [Nn]* )
            echo "Conversion canceled"
            exit
            ;;
    esac
done

# Check if fastboot exists. If not, inform the user how to install it
if [ -z $(which fastboot) ]; then
    echo "Something went wrong!"
    echo "Please install Google Platform tools to get fastboot."
    echo "Debian/Ubuntu: apt install android-tools-fastboot"
    echo "macOS: brew install android-platform-tools"
    echo "Windows: scoop install adb"
    echo "Arch: AUR android-sdk-platform-tools (yay -S android-sdk-platform-tools)"
    echo "Conversion canceled"
    exit
fi

# Double check we have all the required images
files=( *."img" )
if [ ${#files[@]} -lt 34 ]; then
    echo "Something went wrong!"
    echo "Your working directory does not contain .img files. Make sure you are executing this script from the payload output directory (where all the .img files are)"
    echo "Conversion canceled"
    exit
fi

# Begin flashing. Cross your fingers nothing goes wrong
echo "Flashing... Your device will reboot a few times, don't panic"
echo "When reporting errors, make sure to include the output of \"fastboot --version\" and any outputs from this script."
set -x
fastboot flash dtbo dtbo.img
fastboot flash splash splash.img
fastboot flash modem modem.img
fastboot flash oplusstanvbk oplusstanvbk.img
fastboot flash oplus_sec oplus_sec.img
fastboot --disable-verity flash vbmeta vbmeta.img
fastboot --disable-verity flash vbmeta_system vbmeta_system.img
fastboot --disable-verity flash vbmeta_vendor vbmeta_vendor.img

fastboot reboot fastboot

fastboot flash aop aop.img
fastboot flash bluetooth bluetooth.img
fastboot flash dsp dsp.img
fastboot flash dtbo dtbo.img
fastboot flash splash splash.img
fastboot flash modem modem.img
fastboot flash oplusstanvbk oplusstanvbk.img
fastboot flash qupfw qupfw.img
fastboot flash oplus_sec oplus_sec.img
fastboot flash multiimgoem multiimgoem.img
fastboot flash uefisecapp uefisecapp.img
fastboot flash abl abl.img
fastboot flash bluetooth bluetooth.img
fastboot flash cpucp cpucp.img
fastboot flash devcfg devcfg.img
fastboot flash featenabler featenabler.img
fastboot flash hyp hyp.img
fastboot flash imagefv imagefv.img
fastboot flash keymaster keymaster.img
fastboot flash qweslicstore qweslicstore.img
fastboot flash shrm shrm.img
fastboot flash tz tz.img
fastboot flash vendor_boot vendor_boot.img
fastboot flash vm-bootsys vm-bootsys.img
fastboot flash xbl xbl.img
fastboot flash xbl_config xbl_config.img

fastboot reboot fastboot

fastboot flash product product.img
fastboot flash system system.img
fastboot flash system_ext system_ext.img
fastboot flash vendor vendor.img
fastboot flash odm odm.img

fastboot reboot bootloader
sleep 25
fastboot -w

set +x
echo -e "Done! \nPlease reboot to recovery via the menus and wipe everything prior to boot"
read -p "Press any key to continue..."