stm32mp1_private.c

/*
 * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>

#include <platform_def.h>

#include <drivers/st/stm32_iwdg.h>
#include <lib/xlat_tables/xlat_tables_v2.h>

#define MAP_SRAM	MAP_REGION_FLAT(STM32MP_SYSRAM_BASE, \
					STM32MP_SYSRAM_SIZE, \
					MT_MEMORY | \
					MT_RW | \
					MT_SECURE | \
					MT_EXECUTE_NEVER)

#define MAP_DEVICE1	MAP_REGION_FLAT(STM32MP1_DEVICE1_BASE, \
					STM32MP1_DEVICE1_SIZE, \
					MT_DEVICE | \
					MT_RW | \
					MT_SECURE | \
					MT_EXECUTE_NEVER)

#define MAP_DEVICE2	MAP_REGION_FLAT(STM32MP1_DEVICE2_BASE, \
					STM32MP1_DEVICE2_SIZE, \
					MT_DEVICE | \
					MT_RW | \
					MT_SECURE | \
					MT_EXECUTE_NEVER)

#if defined(IMAGE_BL2)
static const mmap_region_t stm32mp1_mmap[] = {
	MAP_SRAM,
	MAP_DEVICE1,
	MAP_DEVICE2,
	{0}
};
#endif
#if defined(IMAGE_BL32)
static const mmap_region_t stm32mp1_mmap[] = {
	MAP_SRAM,
	MAP_DEVICE1,
	MAP_DEVICE2,
	{0}
};
#endif

void configure_mmu(void)
{
	mmap_add(stm32mp1_mmap);
	init_xlat_tables();

	enable_mmu_svc_mon(0);
}

unsigned long stm32_get_gpio_bank_clock(unsigned int bank)
{
	if (bank == GPIO_BANK_Z) {
		return GPIOZ;
	}

	assert(GPIO_BANK_A == 0 && bank <= GPIO_BANK_K);

	return GPIOA + (bank - GPIO_BANK_A);
}

static int get_part_number(uint32_t *part_nb)
{
	uint32_t part_number;
	uint32_t dev_id;

	if (stm32mp1_dbgmcu_get_chip_dev_id(&dev_id) < 0) {
		return -1;
	}

	if (bsec_shadow_read_otp(&part_number, PART_NUMBER_OTP) != BSEC_OK) {
		ERROR("BSEC: PART_NUMBER_OTP Error\n");
		return -1;
	}

	part_number = (part_number & PART_NUMBER_OTP_PART_MASK) >>
		PART_NUMBER_OTP_PART_SHIFT;

	*part_nb = part_number | (dev_id << 16);

	return 0;
}

static int get_cpu_package(uint32_t *cpu_package)
{
	uint32_t package;

	if (bsec_shadow_read_otp(&package, PACKAGE_OTP) != BSEC_OK) {
		ERROR("BSEC: PACKAGE_OTP Error\n");
		return -1;
	}

	*cpu_package = (package & PACKAGE_OTP_PKG_MASK) >>
		PACKAGE_OTP_PKG_SHIFT;

	return 0;
}

void stm32mp_print_cpuinfo(void)
{
	const char *cpu_s, *cpu_r, *pkg;
	uint32_t part_number;
	uint32_t cpu_package;
	uint32_t chip_dev_id;
	int ret;

	/* MPUs Part Numbers */
	ret = get_part_number(&part_number);
	if (ret < 0) {
		WARN("Cannot get part number\n");
		return;
	}

	switch (part_number) {
	case STM32MP157C_PART_NB:
		cpu_s = "157C";
		break;
	case STM32MP157A_PART_NB:
		cpu_s = "157A";
		break;
	case STM32MP153C_PART_NB:
		cpu_s = "153C";
		break;
	case STM32MP153A_PART_NB:
		cpu_s = "153A";
		break;
	case STM32MP151C_PART_NB:
		cpu_s = "151C";
		break;
	case STM32MP151A_PART_NB:
		cpu_s = "151A";
		break;
	default:
		cpu_s = "????";
		break;
	}

	/* Package */
	ret = get_cpu_package(&cpu_package);
	if (ret < 0) {
		WARN("Cannot get CPU package\n");
		return;
	}

	switch (cpu_package) {
	case PKG_AA_LFBGA448:
		pkg = "AA";
		break;
	case PKG_AB_LFBGA354:
		pkg = "AB";
		break;
	case PKG_AC_TFBGA361:
		pkg = "AC";
		break;
	case PKG_AD_TFBGA257:
		pkg = "AD";
		break;
	default:
		pkg = "??";
		break;
	}

	/* REVISION */
	ret = stm32mp1_dbgmcu_get_chip_version(&chip_dev_id);
	if (ret < 0) {
		WARN("Cannot get CPU version\n");
		return;
	}

	switch (chip_dev_id) {
	case STM32MP1_REV_B:
		cpu_r = "B";
		break;
	default:
		cpu_r = "?";
		break;
	}

	NOTICE("CPU: STM32MP%s%s Rev.%s\n", cpu_s, pkg, cpu_r);
}

uint32_t stm32_iwdg_get_instance(uintptr_t base)
{
	switch (base) {
	case IWDG1_BASE:
		return IWDG1_INST;
	case IWDG2_BASE:
		return IWDG2_INST;
	default:
		panic();
	}
}

uint32_t stm32_iwdg_get_otp_config(uint32_t iwdg_inst)
{
	uint32_t iwdg_cfg = 0U;
	uint32_t otp_value;

#if defined(IMAGE_BL2)
	if (bsec_shadow_register(HW2_OTP) != BSEC_OK) {
		panic();
	}
#endif

	if (bsec_read_otp(&otp_value, HW2_OTP) != BSEC_OK) {
		panic();
	}

	if ((otp_value & BIT(iwdg_inst + HW2_OTP_IWDG_HW_POS)) != 0U) {
		iwdg_cfg |= IWDG_HW_ENABLED;
	}

	if ((otp_value & BIT(iwdg_inst + HW2_OTP_IWDG_FZ_STOP_POS)) != 0U) {
		iwdg_cfg |= IWDG_DISABLE_ON_STOP;
	}

	if ((otp_value & BIT(iwdg_inst + HW2_OTP_IWDG_FZ_STANDBY_POS)) != 0U) {
		iwdg_cfg |= IWDG_DISABLE_ON_STANDBY;
	}

	return iwdg_cfg;
}

#if defined(IMAGE_BL2)
uint32_t stm32_iwdg_shadow_update(uint32_t iwdg_inst, uint32_t flags)
{
	uint32_t otp;
	uint32_t result;

	if (bsec_shadow_read_otp(&otp, HW2_OTP) != BSEC_OK) {
		panic();
	}

	if ((flags & IWDG_DISABLE_ON_STOP) != 0U) {
		otp |= BIT(iwdg_inst + HW2_OTP_IWDG_FZ_STOP_POS);
	}

	if ((flags & IWDG_DISABLE_ON_STANDBY) != 0U) {
		otp |= BIT(iwdg_inst + HW2_OTP_IWDG_FZ_STANDBY_POS);
	}

	result = bsec_write_otp(otp, HW2_OTP);
	if (result != BSEC_OK) {
		return result;
	}

	/* Sticky lock OTP_IWDG (read and write) */
	if (!bsec_write_sr_lock(HW2_OTP, 1U) ||
	    !bsec_write_sw_lock(HW2_OTP, 1U)) {
		return BSEC_LOCK_FAIL;
	}

	return BSEC_OK;
}
#endif