这个修改主要是在多个文件中增加了一个选项，当设备在恢复模式下并且特定的GPIO引脚被设置时，设备将进行强制的工厂重置。
修改的文件：
- bootable/recovery/recovery.cpp
- vendor/mediatek/proprietary/bootable/bootloader/lk/app/mt_boot/mt_boot.c
- vendor/mediatek/proprietary/bootable/bootloader/lk/platform/mt6735/platform.c
- vendor/mediatek/proprietary/bootable/bootloader/lk/target/XX8735/dct/dct/codegen.dws
- vendor/mediatek/proprietary/bootable/bootloader/preloader/custom/XX8735/dct/dct/codegen.dws
文件修改说明：
1. recovery.cpp
在这个文件中，增加了一个函数is_need_force_factory_reset()，该函数会检查/proc/cmdline中是否存在force_reset参数。如果存在，那么在恢复模式下，设备将进行强制的工厂重置。
2. mt_boot.c
在这个文件中，在恢复模式下检查了GPIO71的状态。如果GPIO71的状态为0，那么将在命令行参数中增加force_reset。
3. platform.c
在这个文件中，也检查了GPIO71的状态。如果GPIO71的状态为0，那么将设备的启动模式设置为恢复模式。
4. codegen.dws
这两个二进制文件被修改，但由于它们是二进制文件，无法提供具体的修改内容(实际上是笔记忘记截图了) 就是用dct mtk专用的gpio 修改工具把gpio 改吧改吧就欧克了。
--- bootable/recovery/recovery.cpp | 28 +++++++++++++++++- .../bootloader/lk/app/mt_boot/mt_boot.c | 8 ++++- .../bootloader/lk/platform/mt6735/platform.c | 4 +++ .../lk/target/XX8735/dct/dct/codegen.dws | Bin 29887 -> 29887 bytes .../custom/XX8735/dct/dct/codegen.dws | Bin 29938 -> 29887 bytes 5 files changed, 38 insertions(+), 2 deletions(-) diff --git a/bootable/recovery/recovery.cpp b/bootable/recovery/recovery.cpp index 736423e3644..823635b1872 100755 --- a/bootable/recovery/recovery.cpp +++ b/bootable/recovery/recovery.cpp @@ -116,6 +116,8 @@ static const char *TEMPORARY_LOG_FILE = "/tmp/recovery.log"; static const char *TEMPORARY_INSTALL_FILE = "/tmp/last_install"; static const char *LAST_KMSG_FILE = "/cache/recovery/last_kmsg"; static const char *LAST_LOG_FILE = "/cache/recovery/last_log"; + +static const char *COMMAND_LINE="/proc/cmdline"; // We will try to apply the update package 5 times at most in case of an I/O error or // bspatch | imgpatch error. static const int RETRY_LIMIT = 4; @@ -137,7 +139,7 @@ static bool has_cache = false; static bool has_nvdata = false; RecoveryUI* ui = nullptr; -bool modified_flash = false; +bool modified_flash = true; std::string stage; const char* reason = nullptr; struct selabel_handle* sehandle; @@ -1359,6 +1361,23 @@ static void log_failure_code(ErrorCode code, const char *update_package) { LOG(INFO) << log_content; } +int is_need_force_factory_reset() +{ + char param[1024]; + int fd, ret; + char *s=NULL; + + memset(param,0,1024); + fd= open("/proc/cmdline", O_RDONLY); + ret = read(fd, (char*)param, 1024); + printf("cmdline=%s\n",param); + s = strstr(param,"force_reset"); + if(s!= NULL) + return 1; + else + return 0; +} + int main(int argc, char **argv) { // We don't have logcat yet under recovery; so we'll print error on screen and // log to stdout (which is redirected to recovery.log) as we used to do. @@ -1422,6 +1441,11 @@ int main(int argc, char **argv) { int retry_count = 0; bool security_update = false; + if(args.size() == 1 && is_need_force_factory_reset() == 1){ + should_wipe_data = true; + should_wipe_cache=true; + printf("exec wipe_data \n"); + } int arg; int option_index; while ((arg = getopt_long(args_to_parse.size(), args_to_parse.data(), "", OPTIONS, @@ -1466,6 +1490,8 @@ int main(int argc, char **argv) { } } + //check_usbboot(); + printf("locale is [%s]\n", locale.c_str()); printf("stage is [%s]\n", stage.c_str()); printf("reason is [%s]\n", reason); diff --git a/vendor/mediatek/proprietary/bootable/bootloader/lk/app/mt_boot/mt_boot.c b/vendor/mediatek/proprietary/bootable/bootloader/lk/app/mt_boot/mt_boot.c index 55e5b07f6f2..ca1272c99cc 100755 --- a/vendor/mediatek/proprietary/bootable/bootloader/lk/app/mt_boot/mt_boot.c +++ b/vendor/mediatek/proprietary/bootable/bootloader/lk/app/mt_boot/mt_boot.c @@ -70,7 +70,7 @@ #include <iothread.h> #include <RoT.h> #include <odm_mdtbo.h> // for load_overlay_dtbo() - +#include <platform/mt_gpio.h> #include <profiling.h> #include <rnd.h> @@ -2322,6 +2322,12 @@ int boot_linux_from_storage(void) } } + if (g_boot_mode == RECOVERY_BOOT) { + if(mt_get_gpio_in(GPIO71) == 0){ + cmdline_append("force_reset"); + } + } + /* pass the meta_log_disable to user space logger, default is enable */ if (is_meta_log_disable && (is_meta_log_disable() == 1)) { cmdline_append("androidboot.meta_log_disable=1"); diff --git a/vendor/mediatek/proprietary/bootable/bootloader/lk/platform/mt6735/platform.c b/vendor/mediatek/proprietary/bootable/bootloader/lk/platform/mt6735/platform.c index 86b91982c49..8558d001389 100755 --- a/vendor/mediatek/proprietary/bootable/bootloader/lk/platform/mt6735/platform.c +++ b/vendor/mediatek/proprietary/bootable/bootloader/lk/platform/mt6735/platform.c @@ -652,6 +652,10 @@ static void lk_boot_mode_select(void) boot_mode_select(); + if(mt_get_gpio_in(GPIO71) == 0){ + g_boot_mode = RECOVERY_BOOT; + } + #ifdef CFG_DTB_EARLY_LOADER_SUPPORT /* reload dtb when boot mode = recovery */ if ((g_boot_mode == RECOVERY_BOOT) && (bldr_load_dtb("recovery") < 0)) diff --git a/vendor/mediatek/proprietary/bootable/bootloader/lk/target/XX8735/dct/dct/codegen.dws b/vendor/mediatek/proprietary/bootable/bootloader/lk/target/XX8735/dct/dct/codegen.dws index c9abb1bee0fb5c20e775dea9edabe6a4357b2ef8..b6c155e31d9c2720249aee4a1c8a55df1e1a2866 100755 GIT binary patch delta 34 scmV+-0Nww;=>fm#0k8ralWzn-lS>d7ldlX!lh7dqlb}o-v%VVvS@XsX2LJ#7 delta 49 zcmV-10M7rv=>fm#0k8ralfWMYlfD}ek{u9}AQ=dgARP#kuq-5#a3@5Q&>;kqpiCUI Hz8e8q%^(qn diff --git a/vendor/mediatek/proprietary/bootable/bootloader/preloader/custom/XX8735/dct/dct/codegen.dws b/vendor/mediatek/proprietary/bootable/bootloader/preloader/custom/XX8735/dct/dct/codegen.dws index 1d72e4a55831802a51a1be0da022bb3c563e0eb4..17f6b28bac9fa453429ea36d21625c1fdbe82ca7 100755 GIT binary patch delta 78 zcmezLl5zh_#tr|ZCMQU;OwMO<nCvZ}GC9CTV6uQD&*Xjqj>&q`5|i!SRVFt$2u%JV htpR2qkP(@DK!#<qf+WY}cXkq!KZx;fo+A?$0RVCv8|VN4 delta 109 zcmdo0lJV0^#tr|ZCV!BznEXIclEW*+(LFxI*?TghkisNcp2-I89Fwc0H70)$<b=w( lcp}T4bQPE!&nST`?+=lem?X<GSwWIxvVyGE<{X*e2mmY*B69!$ -- 2.29.0
