需要在fastboot里面添加功能用于保存，记录一下fastboot显示的过程。
android O新添加了选项，如下
platform/msm_shared/rules.mk
ifeq ($(ENABLE_FBCON_DISPLAY_MSG),1)
OBJS +=
$(LOCAL_DIR)/menu_keys_detect.o
$(LOCAL_DIR)/display_menu.o
endif
要显示fastboot的选项，需要打开ENABLE_FBCON_DISPLAY_MSG， FBCON_DISPLAY_MSG。
project/msm8953.mk
ifeq ($(VERIFIED_BOOT),1)
ENABLE_SECAPP_LOADER := 1
ENABLE_RPMB_SUPPORT := 1
ifneq (,$(findstring DISPLAY_SPLASH_SCREEN,$(DEFINES)))
#enable fbcon display menu
ENABLE_FBCON_DISPLAY_MSG := 1 ## 这个打开了才会显示fastboot的选项框
endif
endif
ifeq ($(ENABLE_FBCON_DISPLAY_MSG),1)
DEFINES += FBCON_DISPLAY_MSG=1 ## 代码中会用到
endif
app/aboot/aboot.c
void aboot_init()
{
fastboot:
/* We are here means regular boot did not happen. Start fastboot. */
/* register aboot specific fastboot commands */
aboot_fastboot_register_commands();
/* dump partition table for debug info */
partition_dump();
/* initialize and start fastboot */
fastboot_init(target_get_scratch_address(), target_get_max_flash_size());
#if DISPLAY_SPLASH_SCREEN
display_fastboot_on_screen();
#endif
#if FBCON_DISPLAY_MSG
display_fastboot_menu();
#endif
}
显示有两种情况，display_fastboot_on_screen()显示界面就是一个空白的界面，中间显示一个很小的"Fastboot Mode".
dev/fbcon/fbcon.c
void display_fastboot_on_screen(void)
{
unsigned count = config->width * config->height;
char *pixels;
char *draw_text = "Fastboot Mode";
char *c;
unsigned char_count, loop = 0, bpp;
bpp = (config->bpp) / 8;
// Draw White Background
memset(config->base, RGB565_WHITE, count * bpp);
// Draw
char_count = strlen(draw_text);
pixels = config->base;
pixels += ((config->height - FONT_HEIGHT) / 2) * config->width * bpp;
pixels += ((config->width - (FONT_WIDTH + 1)*char_count) / 2) * bpp;
c = draw_text;
while(loop < char_count)
{
fbcon_drawglyph_fastboot(pixels, config->width, bpp, font5x12 + (*c - 32) * 2);
loop++;
c++;
pixels += (FONT_WIDTH + 1) * bpp;
}
arch_clean_invalidate_cache_range((addr_t) config->base, (count * bpp));
fbcon_flush();
}
platform/msm_shared/display_menu.c
//fastboot显示出来的选项
static char *fastboot_option_menu[] = {
[0] = "START
",
[1] = "Restart bootloader
",
[2] = "Recovery mode
",
[3] = "Power off
",
[4] = "Boot to FFBM
"
};
void display_fastboot_menu()
{
struct select_msg_info *fastboot_menu_msg_info;
fastboot_menu_msg_info = &msg_info;
set_message_factor();
msg_lock_init();
mutex_acquire(&fastboot_menu_msg_info->msg_lock);
/* There are 4 pages for fastboot menu:
* Page: Start/Fastboot/Recovery/Poweroff
* The menu is switched base on the option index
* Initialize the option index and last_msg_type
*/
fastboot_menu_msg_info->info.option_index = 0;
fastboot_menu_msg_info->last_msg_type =
fastboot_menu_msg_info->info.msg_type;
display_fastboot_menu_renew(fastboot_menu_msg_info); // bootloader显示
mutex_release(&fastboot_menu_msg_info->msg_lock);
dprintf(INFO, "creating fastboot menu keys detect thread
");
display_menu_thread_start(fastboot_menu_msg_info); // 显示线程，检测按键按下，对应的显示
}
// fastboot显示的文本，每次都会更新
void display_fastboot_menu_renew(struct select_msg_info *fastboot_msg_info)
{
int len;
int msg_type = FBCON_COMMON_MSG;
char msg_buf[64];
char msg[128];
device_info device;
/* The fastboot menu is switched base on the option index
* So it's need to store the index for the menu switching
*/
uint32_t option_index = fastboot_msg_info->info.option_index;
fbcon_clear();
memset(&fastboot_msg_info->info, 0, sizeof(struct menu_info));
len = ARRAY_SIZE(fastboot_option_menu);
// 不同选项对应的字体颜色
switch(option_index) {
case 0:
msg_type = FBCON_GREEN_MSG;
break;
case 1:
case 2:
msg_type = FBCON_RED_MSG;
break;
case 3:
case 4:
msg_type = FBCON_COMMON_MSG;
break;
}
fbcon_draw_line(msg_type);
display_fbcon_menu_message(fastboot_option_menu[option_index],
msg_type, big_factor);
fbcon_draw_line(msg_type); // 显示文字
display_fbcon_menu_message("
Press volume key to select, and "
"press power key to select
", FBCON_COMMON_MSG, common_factor);
display_fbcon_menu_message("FASTBOOT MODE
", FBCON_RED_MSG, common_factor);
get_product_name((unsigned char *) msg_buf);
snprintf(msg, sizeof(msg), "PRODUCT_NAME - %s
", msg_buf);
display_fbcon_menu_message(msg, FBCON_COMMON_MSG, common_factor);
memset(msg_buf, 0, sizeof(msg_buf));
smem_get_hw_platform_name((unsigned char *) msg_buf, sizeof(msg_buf));
snprintf(msg, sizeof(msg), "VARIANT - %s %s
",
msg_buf, target_is_emmc_boot()? "eMMC":"UFS");
display_fbcon_menu_message(msg, FBCON_COMMON_MSG, common_factor);
memset(msg_buf, 0, sizeof(msg_buf));
get_bootloader_version((unsigned char *) msg_buf);
snprintf(msg, sizeof(msg), "BOOTLOADER VERSION - %s
",
msg_buf);
display_fbcon_menu_message(msg, FBCON_COMMON_MSG, common_factor);
memset(msg_buf, 0, sizeof(msg_buf));
get_baseband_version((unsigned char *) msg_buf);
snprintf(msg, sizeof(msg), "BASEBAND VERSION - %s
",
msg_buf);
display_fbcon_menu_message(msg, FBCON_COMMON_MSG, common_factor);
memset(msg_buf, 0, sizeof(msg_buf));
target_serialno((unsigned char *) msg_buf);
snprintf(msg, sizeof(msg), "SERIAL NUMBER - %s
", msg_buf);
display_fbcon_menu_message(msg, FBCON_COMMON_MSG, common_factor);
snprintf(msg, sizeof(msg), "SECURE BOOT - %s
",
is_secure_boot_enable()? "enabled":"disabled");
display_fbcon_menu_message(msg, FBCON_COMMON_MSG, common_factor);
snprintf(msg, sizeof(msg), "DEVICE STATE - %s
",
is_device_locked()? "locked":"unlocked");
display_fbcon_menu_message(msg, FBCON_RED_MSG, common_factor);
fastboot_msg_info->info.msg_type = DISPLAY_MENU_FASTBOOT;
fastboot_msg_info->info.option_num = len;
fastboot_msg_info->info.option_index = option_index;
}
按键线程
platform/msm_shared/menu_keys_detect.c
int select_msg_keys_detect(void *param) {
struct select_msg_info *msg_info = (struct select_msg_info*)param;
msg_lock_init();
keys_detect_init();
while(1) {
/* 1: update select option's index, default it is the total option number
* volume up: index decrease, the option will scroll up from
* the bottom to top if the key is pressed firstly.
* eg: 5->4->3->2->1->0
* volume down: index increase, the option will scroll down from
* the bottom to top if the key is pressed firstly.
* eg: 5->0
* 2: update device's status via select option's index
*/
if (is_key_pressed(VOLUME_UP)) {
mutex_acquire(&msg_info->msg_lock);
menu_pages_action[msg_info->info.msg_type].up_action_func(msg_info);
mutex_release(&msg_info->msg_lock);
} else if (is_key_pressed(VOLUME_DOWN)) { // VOLUME_DOWN
mutex_acquire(&msg_info->msg_lock);
menu_pages_action[msg_info->info.msg_type].down_action_func(msg_info);
mutex_release(&msg_info->msg_lock);
} else if (is_key_pressed(POWER_KEY)) {
mutex_acquire(&msg_info->msg_lock);
menu_pages_action[msg_info->info.msg_type].enter_action_func(msg_info);
mutex_release(&msg_info->msg_lock);
}
mutex_acquire(&msg_info->msg_lock);
/* Never time out if the timeout_time is 0 */
if(msg_info->info.timeout_time) {
if ((current_time() - before_time) > msg_info->info.timeout_time)
msg_info->info.is_exit = true;
}
if (msg_info->info.is_exit) {
msg_info->info.rel_exit = true;
mutex_release(&msg_info->msg_lock);
break;
}
mutex_release(&msg_info->msg_lock);
thread_sleep(KEY_DETECT_FREQUENCY);
}
return 0;
}
对应的结构体中的函数指针如下：
static struct pages_action menu_pages_action[] = {
[DISPLAY_MENU_UNLOCK] = {
menu_volume_up_func,
menu_volume_down_func,
power_key_func,
},
[DISPLAY_MENU_UNLOCK_CRITICAL] = {
menu_volume_up_func,
menu_volume_down_func,
power_key_func,
},
[DISPLAY_MENU_YELLOW] = {
boot_warning_volume_keys_func,
boot_warning_volume_keys_func,
power_key_func,
},
[DISPLAY_MENU_ORANGE] = {
boot_warning_volume_keys_func,
boot_warning_volume_keys_func,
power_key_func,
},
[DISPLAY_MENU_RED] = {
boot_warning_volume_keys_func,
boot_warning_volume_keys_func,
power_key_func,
},
[DISPLAY_MENU_LOGGING] = {
boot_warning_volume_keys_func,
boot_warning_volume_keys_func,
power_key_func,
},
[DISPLAY_MENU_EIO] = {
boot_warning_volume_keys_func,
boot_warning_volume_keys_func,
power_key_func,
}
分析其中的power按键功能
static void power_key_func(struct select_msg_info* msg_info)
{
int reason = -1;
switch (msg_info->info.msg_type) {
case DISPLAY_MENU_YELLOW:
case DISPLAY_MENU_ORANGE:
case DISPLAY_MENU_RED:
case DISPLAY_MENU_LOGGING:
reason = CONTINUE;
break;
case DISPLAY_MENU_EIO:
pwr_key_is_pressed = true;
reason = CONTINUE;
break;
case DISPLAY_MENU_MORE_OPTION:
if(msg_info->info.option_index < ARRAY_SIZE(verify_index_action))
reason = verify_index_action[msg_info->info.option_index];
break;
case DISPLAY_MENU_UNLOCK:
case DISPLAY_MENU_UNLOCK_CRITICAL:
if(msg_info->info.option_index < ARRAY_SIZE(unlock_index_action))
reason = unlock_index_action[msg_info->info.option_index];
break;
case DISPLAY_MENU_FASTBOOT:
if(msg_info->info.option_index < ARRAY_SIZE(fastboot_index_action))
reason = fastboot_index_action[msg_info->info.option_index];
break;
default:
dprintf(CRITICAL,"Unsupported menu type
");
break;
}
if (reason != -1) {
update_device_status(msg_info, reason); // 更新显示状态
}
}
}
static void update_device_status(struct select_msg_info* msg_info, int reason)
{
char ffbm_page_buffer[FFBM_MODE_BUF_SIZE];
fbcon_clear();
struct device_info device;
switch (reason) {
case RECOVER: // 根据选项进行设置
if (msg_info->info.msg_type == DISPLAY_MENU_UNLOCK) {
set_device_unlock_value(UNLOCK, TRUE);
} else if (msg_info->info.msg_type == DISPLAY_MENU_UNLOCK_CRITICAL) {
set_device_unlock_value(UNLOCK_CRITICAL, TRUE);
}
if (msg_info->info.msg_type == DISPLAY_MENU_UNLOCK ||
msg_info->info.msg_type == DISPLAY_MENU_UNLOCK_CRITICAL) {
/* wipe data */
struct recovery_message msg;
memset(&msg, 0, sizeof(msg));
snprintf(msg.recovery, sizeof(msg.recovery), "recovery
--wipe_data");
write_misc(0, &msg, sizeof(msg));
}
reboot_device(RECOVERY_MODE);
break;
case RESTART:
reboot_device(0);
break;
case POWEROFF:
shutdown_device();
break;
case FASTBOOT:
reboot_device(FASTBOOT_MODE);
break;
case CONTINUE:
display_image_on_screen();
/* Continue boot, no need to detect the keys'status */
msg_info->info.is_exit = true;
break;
case BACK:
display_bootverify_menu_renew(msg_info, msg_info->last_msg_type);
before_time = current_time();
break;
case FFBM:
memset(&ffbm_page_buffer, 0, sizeof(ffbm_page_buffer));
snprintf(ffbm_page_buffer, sizeof(ffbm_page_buffer), "ffbm-00");
write_misc(0, ffbm_page_buffer, sizeof(ffbm_page_buffer));
reboot_device(0);
break;
}
enum device_select_option {
POWEROFF = 0,
RESTART,
RECOVER,
FASTBOOT,
BACK,
CONTINUE,
FFBM,
};
Tony Liu
2018-2-2