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// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_rtc
*
* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* Test the real time clock runtime services.
*/
#include <efi_selftest.h>
#define EFI_ST_NO_RTC "Could not read real time clock\n"
#define EFI_ST_NO_RTC_SET "Could not set real time clock\n"
static struct efi_runtime_services *runtime;
/*
* Setup unit test.
*
* @handle: handle of the loaded image
* @systable: system table
* Return: EFI_ST_SUCCESS for success
*/
static int setup(const efi_handle_t handle,
const struct efi_system_table *systable)
{
runtime = systable->runtime;
return EFI_ST_SUCCESS;
}
/*
* Execute unit test.
*
* Read and display current time.
* Set a new value and read it back.
* Set the real time clock back the current time.
*
* Return: EFI_ST_SUCCESS for success
*/
static int execute(void)
{
efi_status_t ret;
struct efi_time tm_old;
#ifdef CONFIG_EFI_SET_TIME
struct efi_time tm, tm_new = {
.year = 2017,
.month = 5,
.day = 19,
.hour = 13,
.minute = 47,
.second = 53,
};
#endif
/* Display current time */
ret = runtime->get_time(&tm_old, NULL);
if (ret != EFI_SUCCESS) {
efi_st_error(EFI_ST_NO_RTC);
return EFI_ST_FAILURE;
}
efi_st_printf("Time according to real time clock: "
"%.4u-%.2u-%.2u %.2u:%.2u:%.2u\n",
tm_old.year, tm_old.month, tm_old.day,
tm_old.hour, tm_old.minute, tm_old.second);
#ifdef CONFIG_EFI_SET_TIME
ret = runtime->set_time(&tm_new);
if (ret != EFI_SUCCESS) {
efi_st_error(EFI_ST_NO_RTC_SET);
return EFI_ST_FAILURE;
}
ret = runtime->get_time(&tm, NULL);
if (ret != EFI_SUCCESS) {
efi_st_error(EFI_ST_NO_RTC);
return EFI_ST_FAILURE;
}
if (tm.year != tm_new.year ||
tm.month != tm_new.month ||
tm.day != tm_new.day ||
tm.hour != tm_new.hour ||
tm.minute != tm_new.minute ||
tm.second < tm_new.second ||
tm.second > tm_new.second + 2) {
efi_st_error(EFI_ST_NO_RTC_SET);
return EFI_ST_FAILURE;
}
/* Set time back to old value */
ret = runtime->set_time(&tm_old);
if (ret != EFI_SUCCESS) {
efi_st_error(EFI_ST_NO_RTC_SET);
return EFI_ST_FAILURE;
}
#endif
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(rtc) = {
.name = "real time clock",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
};
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