hikey_bl2_setup.c

/*
 * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <arch_helpers.h>
#include <assert.h>
#include <bl_common.h>
#include <console.h>
#include <debug.h>
#include <desc_image_load.h>
#include <dw_mmc.h>
#include <emmc.h>
#include <errno.h>
#include <gpio.h>
#include <hi6220.h>
#include <hi6553.h>
#include <hisi_mcu.h>
#include <hisi_sram_map.h>
#include <mmio.h>
#ifdef SPD_opteed
#include <optee_utils.h>
#endif
#include <pl061_gpio.h>
#include <platform.h>
#include <platform_def.h>
#include <sp804_delay_timer.h>
#include <string.h>

#include "hikey_def.h"
#include "hikey_private.h"

/*
 * The next 2 constants identify the extents of the code & RO data region.
 * These addresses are used by the MMU setup code and therefore they must be
 * page-aligned.  It is the responsibility of the linker script to ensure that
 * __RO_START__ and __RO_END__ linker symbols refer to page-aligned addresses.
 */
#define BL2_RO_BASE (unsigned long)(&__RO_START__)
#define BL2_RO_LIMIT (unsigned long)(&__RO_END__)

#define BL2_RW_BASE		(BL2_RO_LIMIT)

/*
 * The next 2 constants identify the extents of the coherent memory region.
 * These addresses are used by the MMU setup code and therefore they must be
 * page-aligned.  It is the responsibility of the linker script to ensure that
 * __COHERENT_RAM_START__ and __COHERENT_RAM_END__ linker symbols refer to
 * page-aligned addresses.
 */
#define BL2_COHERENT_RAM_BASE (unsigned long)(&__COHERENT_RAM_START__)
#define BL2_COHERENT_RAM_LIMIT (unsigned long)(&__COHERENT_RAM_END__)

static meminfo_t bl2_el3_tzram_layout;

enum {
	BOOT_MODE_RECOVERY = 0,
	BOOT_MODE_NORMAL,
	BOOT_MODE_MASK = 1,
};

/*******************************************************************************
 * Transfer SCP_BL2 from Trusted RAM using the SCP Download protocol.
 * Return 0 on success, -1 otherwise.
 ******************************************************************************/
int plat_hikey_bl2_handle_scp_bl2(image_info_t *scp_bl2_image_info)
{
	/* Enable MCU SRAM */
	hisi_mcu_enable_sram();

	/* Load MCU binary into SRAM */
	hisi_mcu_load_image(scp_bl2_image_info->image_base,
			    scp_bl2_image_info->image_size);
	/* Let MCU running */
	hisi_mcu_start_run();

	INFO("%s: MCU PC is at 0x%x\n",
	     __func__, mmio_read_32(AO_SC_MCU_SUBSYS_STAT2));
	INFO("%s: AO_SC_PERIPH_CLKSTAT4 is 0x%x\n",
	     __func__, mmio_read_32(AO_SC_PERIPH_CLKSTAT4));
	return 0;
}

/*******************************************************************************
 * Gets SPSR for BL32 entry
 ******************************************************************************/
uint32_t hikey_get_spsr_for_bl32_entry(void)
{
	/*
	 * The Secure Payload Dispatcher service is responsible for
	 * setting the SPSR prior to entry into the BL3-2 image.
	 */
	return 0;
}

/*******************************************************************************
 * Gets SPSR for BL33 entry
 ******************************************************************************/
#ifndef AARCH32
uint32_t hikey_get_spsr_for_bl33_entry(void)
{
	unsigned int mode;
	uint32_t spsr;

	/* Figure out what mode we enter the non-secure world in */
	mode = EL_IMPLEMENTED(2) ? MODE_EL2 : MODE_EL1;

	/*
	 * TODO: Consider the possibility of specifying the SPSR in
	 * the FIP ToC and allowing the platform to have a say as
	 * well.
	 */
	spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
	return spsr;
}
#else
uint32_t hikey_get_spsr_for_bl33_entry(void)
{
	unsigned int hyp_status, mode, spsr;

	hyp_status = GET_VIRT_EXT(read_id_pfr1());

	mode = (hyp_status) ? MODE32_hyp : MODE32_svc;

	/*
	 * TODO: Consider the possibility of specifying the SPSR in
	 * the FIP ToC and allowing the platform to have a say as
	 * well.
	 */
	spsr = SPSR_MODE32(mode, plat_get_ns_image_entrypoint() & 0x1,
			SPSR_E_LITTLE, DISABLE_ALL_EXCEPTIONS);
	return spsr;
}
#endif /* AARCH32 */

int hikey_bl2_handle_post_image_load(unsigned int image_id)
{
	int err = 0;
	bl_mem_params_node_t *bl_mem_params = get_bl_mem_params_node(image_id);
#ifdef SPD_opteed
	bl_mem_params_node_t *pager_mem_params = NULL;
	bl_mem_params_node_t *paged_mem_params = NULL;
#endif
	assert(bl_mem_params);

	switch (image_id) {
#ifdef AARCH64
	case BL32_IMAGE_ID:
#ifdef SPD_opteed
		pager_mem_params = get_bl_mem_params_node(BL32_EXTRA1_IMAGE_ID);
		assert(pager_mem_params);

		paged_mem_params = get_bl_mem_params_node(BL32_EXTRA2_IMAGE_ID);
		assert(paged_mem_params);

		err = parse_optee_header(&bl_mem_params->ep_info,
				&pager_mem_params->image_info,
				&paged_mem_params->image_info);
		if (err != 0) {
			WARN("OPTEE header parse error.\n");
		}
#endif
		bl_mem_params->ep_info.spsr = hikey_get_spsr_for_bl32_entry();
		break;
#endif

	case BL33_IMAGE_ID:
		/* BL33 expects to receive the primary CPU MPID (through r0) */
		bl_mem_params->ep_info.args.arg0 = 0xffff & read_mpidr();
		bl_mem_params->ep_info.spsr = hikey_get_spsr_for_bl33_entry();
		break;

#ifdef SCP_BL2_BASE
	case SCP_BL2_IMAGE_ID:
		/* The subsequent handling of SCP_BL2 is platform specific */
		err = plat_hikey_bl2_handle_scp_bl2(&bl_mem_params->image_info);
		if (err) {
			WARN("Failure in platform-specific handling of SCP_BL2 image.\n");
		}
		break;
#endif
	}

	return err;
}

/*******************************************************************************
 * This function can be used by the platforms to update/use image
 * information for given `image_id`.
 ******************************************************************************/
int bl2_plat_handle_post_image_load(unsigned int image_id)
{
	return hikey_bl2_handle_post_image_load(image_id);
}

static void reset_dwmmc_clk(void)
{
	unsigned int data;

	/* disable mmc0 bus clock */
	mmio_write_32(PERI_SC_PERIPH_CLKDIS0, PERI_CLK0_MMC0);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (data & PERI_CLK0_MMC0);
	/* enable mmc0 bus clock */
	mmio_write_32(PERI_SC_PERIPH_CLKEN0, PERI_CLK0_MMC0);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (!(data & PERI_CLK0_MMC0));
	/* reset mmc0 clock domain */
	mmio_write_32(PERI_SC_PERIPH_RSTEN0, PERI_RST0_MMC0);

	/* bypass mmc0 clock phase */
	data = mmio_read_32(PERI_SC_PERIPH_CTRL2);
	data |= 3;
	mmio_write_32(PERI_SC_PERIPH_CTRL2, data);

	/* disable low power */
	data = mmio_read_32(PERI_SC_PERIPH_CTRL13);
	data |= 1 << 3;
	mmio_write_32(PERI_SC_PERIPH_CTRL13, data);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_RSTSTAT0);
	} while (!(data & PERI_RST0_MMC0));

	/* unreset mmc0 clock domain */
	mmio_write_32(PERI_SC_PERIPH_RSTDIS0, PERI_RST0_MMC0);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_RSTSTAT0);
	} while (data & PERI_RST0_MMC0);
}

static void hikey_boardid_init(void)
{
	u_register_t midr;

	midr = read_midr();
	mmio_write_32(MEMORY_AXI_CHIP_ADDR, midr);
	INFO("[BDID] [%x] midr: 0x%x\n", MEMORY_AXI_CHIP_ADDR,
	     (unsigned int)midr);

	mmio_write_32(MEMORY_AXI_BOARD_TYPE_ADDR, 0);
	mmio_write_32(MEMORY_AXI_BOARD_ID_ADDR, 0x2b);

	mmio_write_32(ACPU_ARM64_FLAGA, 0x1234);
	mmio_write_32(ACPU_ARM64_FLAGB, 0x5678);
}

static void hikey_sd_init(void)
{
	/* switch pinmux to SD */
	mmio_write_32(IOMG_SD_CLK, IOMG_MUX_FUNC0);
	mmio_write_32(IOMG_SD_CMD, IOMG_MUX_FUNC0);
	mmio_write_32(IOMG_SD_DATA0, IOMG_MUX_FUNC0);
	mmio_write_32(IOMG_SD_DATA1, IOMG_MUX_FUNC0);
	mmio_write_32(IOMG_SD_DATA2, IOMG_MUX_FUNC0);
	mmio_write_32(IOMG_SD_DATA3, IOMG_MUX_FUNC0);

	mmio_write_32(IOCG_SD_CLK, IOCG_INPUT_16MA);
	mmio_write_32(IOCG_SD_CMD, IOCG_INPUT_12MA);
	mmio_write_32(IOCG_SD_DATA0, IOCG_INPUT_12MA);
	mmio_write_32(IOCG_SD_DATA1, IOCG_INPUT_12MA);
	mmio_write_32(IOCG_SD_DATA2, IOCG_INPUT_12MA);
	mmio_write_32(IOCG_SD_DATA3, IOCG_INPUT_12MA);

	/* set SD Card detect as nopull */
	mmio_write_32(IOCG_GPIO8, 0);
}

static void hikey_jumper_init(void)
{
	/* set jumper detect as nopull */
	mmio_write_32(IOCG_GPIO24, 0);
	/* set jumper detect as GPIO */
	mmio_write_32(IOMG_GPIO24, IOMG_MUX_FUNC0);
}

static void hikey_sp804_init(void)
{
	uint32_t data;

	/* select the clock of dual timer0 */
	data = mmio_read_32(AO_SC_TIMER_EN0);
	while (data & 3) {
		data &= ~3;
		data |= 3 << 16;
		mmio_write_32(AO_SC_TIMER_EN0, data);
		data = mmio_read_32(AO_SC_TIMER_EN0);
	}
	/* enable the pclk of dual timer0 */
	data = mmio_read_32(AO_SC_PERIPH_CLKSTAT4);
	while (!(data & PCLK_TIMER1) || !(data & PCLK_TIMER0)) {
		mmio_write_32(AO_SC_PERIPH_CLKEN4, PCLK_TIMER1 | PCLK_TIMER0);
		data = mmio_read_32(AO_SC_PERIPH_CLKSTAT4);
	}
	/* reset dual timer0 */
	data = mmio_read_32(AO_SC_PERIPH_RSTSTAT4);
	mmio_write_32(AO_SC_PERIPH_RSTEN4, PCLK_TIMER1 | PCLK_TIMER0);
	do {
		data = mmio_read_32(AO_SC_PERIPH_RSTSTAT4);
	} while (!(data & PCLK_TIMER1) || !(data & PCLK_TIMER0));
	/* unreset dual timer0 */
	mmio_write_32(AO_SC_PERIPH_RSTDIS4, PCLK_TIMER1 | PCLK_TIMER0);
	do {
		data = mmio_read_32(AO_SC_PERIPH_RSTSTAT4);
	} while ((data & PCLK_TIMER1) || (data & PCLK_TIMER0));

	sp804_timer_init(SP804_TIMER0_BASE, 10, 192);
}

static void hikey_gpio_init(void)
{
	pl061_gpio_init();
	pl061_gpio_register(GPIO0_BASE, 0);
	pl061_gpio_register(GPIO1_BASE, 1);
	pl061_gpio_register(GPIO2_BASE, 2);
	pl061_gpio_register(GPIO3_BASE, 3);
	pl061_gpio_register(GPIO4_BASE, 4);
	pl061_gpio_register(GPIO5_BASE, 5);
	pl061_gpio_register(GPIO6_BASE, 6);
	pl061_gpio_register(GPIO7_BASE, 7);
	pl061_gpio_register(GPIO8_BASE, 8);
	pl061_gpio_register(GPIO9_BASE, 9);
	pl061_gpio_register(GPIO10_BASE, 10);
	pl061_gpio_register(GPIO11_BASE, 11);
	pl061_gpio_register(GPIO12_BASE, 12);
	pl061_gpio_register(GPIO13_BASE, 13);
	pl061_gpio_register(GPIO14_BASE, 14);
	pl061_gpio_register(GPIO15_BASE, 15);
	pl061_gpio_register(GPIO16_BASE, 16);
	pl061_gpio_register(GPIO17_BASE, 17);
	pl061_gpio_register(GPIO18_BASE, 18);
	pl061_gpio_register(GPIO19_BASE, 19);

	/* Power on indicator LED (USER_LED1). */
	gpio_set_direction(32, GPIO_DIR_OUT);	/* LED1 */
	gpio_set_value(32, GPIO_LEVEL_HIGH);
	gpio_set_direction(33, GPIO_DIR_OUT);	/* LED2 */
	gpio_set_value(33, GPIO_LEVEL_LOW);
	gpio_set_direction(34, GPIO_DIR_OUT);	/* LED3 */
	gpio_set_direction(35, GPIO_DIR_OUT);	/* LED4 */
}

static void hikey_pmussi_init(void)
{
	uint32_t data;

	/* Initialize PWR_HOLD GPIO */
	gpio_set_direction(0, GPIO_DIR_OUT);
	gpio_set_value(0, GPIO_LEVEL_LOW);

	/*
	 * After reset, PMUSSI stays in reset mode.
	 * Now make it out of reset.
	 */
	mmio_write_32(AO_SC_PERIPH_RSTDIS4,
		      AO_SC_PERIPH_RSTDIS4_PRESET_PMUSSI_N);
	do {
		data = mmio_read_32(AO_SC_PERIPH_RSTSTAT4);
	} while (data & AO_SC_PERIPH_RSTDIS4_PRESET_PMUSSI_N);

	/* Set PMUSSI clock latency for read operation. */
	data = mmio_read_32(AO_SC_MCU_SUBSYS_CTRL3);
	data &= ~AO_SC_MCU_SUBSYS_CTRL3_RCLK_MASK;
	data |= AO_SC_MCU_SUBSYS_CTRL3_RCLK_3;
	mmio_write_32(AO_SC_MCU_SUBSYS_CTRL3, data);

	/* enable PMUSSI clock */
	data = AO_SC_PERIPH_CLKEN5_PCLK_PMUSSI_CCPU |
	       AO_SC_PERIPH_CLKEN5_PCLK_PMUSSI_MCU;
	mmio_write_32(AO_SC_PERIPH_CLKEN5, data);
	data = AO_SC_PERIPH_CLKEN4_PCLK_PMUSSI;
	mmio_write_32(AO_SC_PERIPH_CLKEN4, data);

	gpio_set_value(0, GPIO_LEVEL_HIGH);
}

static void hikey_hi6553_init(void)
{
	uint8_t data;

	mmio_write_8(HI6553_PERI_EN_MARK, 0x1e);
	mmio_write_8(HI6553_NP_REG_ADJ1, 0);
	data = DISABLE6_XO_CLK_CONN | DISABLE6_XO_CLK_NFC |
		DISABLE6_XO_CLK_RF1 | DISABLE6_XO_CLK_RF2;
	mmio_write_8(HI6553_DISABLE6_XO_CLK, data);

	/* configure BUCK0 & BUCK1 */
	mmio_write_8(HI6553_BUCK01_CTRL2, 0x5e);
	mmio_write_8(HI6553_BUCK0_CTRL7, 0x10);
	mmio_write_8(HI6553_BUCK1_CTRL7, 0x10);
	mmio_write_8(HI6553_BUCK0_CTRL5, 0x1e);
	mmio_write_8(HI6553_BUCK1_CTRL5, 0x1e);
	mmio_write_8(HI6553_BUCK0_CTRL1, 0xfc);
	mmio_write_8(HI6553_BUCK1_CTRL1, 0xfc);

	/* configure BUCK2 */
	mmio_write_8(HI6553_BUCK2_REG1, 0x4f);
	mmio_write_8(HI6553_BUCK2_REG5, 0x99);
	mmio_write_8(HI6553_BUCK2_REG6, 0x45);
	mdelay(1);
	mmio_write_8(HI6553_VSET_BUCK2_ADJ, 0x22);
	mdelay(1);

	/* configure BUCK3 */
	mmio_write_8(HI6553_BUCK3_REG3, 0x02);
	mmio_write_8(HI6553_BUCK3_REG5, 0x99);
	mmio_write_8(HI6553_BUCK3_REG6, 0x41);
	mmio_write_8(HI6553_VSET_BUCK3_ADJ, 0x02);
	mdelay(1);

	/* configure BUCK4 */
	mmio_write_8(HI6553_BUCK4_REG2, 0x9a);
	mmio_write_8(HI6553_BUCK4_REG5, 0x99);
	mmio_write_8(HI6553_BUCK4_REG6, 0x45);

	/* configure LDO20 */
	mmio_write_8(HI6553_LDO20_REG_ADJ, 0x50);

	mmio_write_8(HI6553_NP_REG_CHG, 0x0f);
	mmio_write_8(HI6553_CLK_TOP0, 0x06);
	mmio_write_8(HI6553_CLK_TOP3, 0xc0);
	mmio_write_8(HI6553_CLK_TOP4, 0x00);

	/* configure LDO7 & LDO10 for SD slot */
	/* enable LDO7 */
	data = mmio_read_8(HI6553_LDO7_REG_ADJ);
	data = (data & 0xf8) | 0x2;
	mmio_write_8(HI6553_LDO7_REG_ADJ, data);
	mdelay(5);
	mmio_write_8(HI6553_ENABLE2_LDO1_8, 1 << 6);
	mdelay(5);
	/* enable LDO10 */
	data = mmio_read_8(HI6553_LDO10_REG_ADJ);
	data = (data & 0xf8) | 0x5;
	mmio_write_8(HI6553_LDO10_REG_ADJ, data);
	mdelay(5);
	mmio_write_8(HI6553_ENABLE3_LDO9_16, 1 << 1);
	mdelay(5);
	/* enable LDO15 */
	data = mmio_read_8(HI6553_LDO15_REG_ADJ);
	data = (data & 0xf8) | 0x4;
	mmio_write_8(HI6553_LDO15_REG_ADJ, data);
	mmio_write_8(HI6553_ENABLE3_LDO9_16, 1 << 6);
	mdelay(5);
	/* enable LDO19 */
	data = mmio_read_8(HI6553_LDO19_REG_ADJ);
	data |= 0x7;
	mmio_write_8(HI6553_LDO19_REG_ADJ, data);
	mmio_write_8(HI6553_ENABLE4_LDO17_22, 1 << 2);
	mdelay(5);
	/* enable LDO21 */
	data = mmio_read_8(HI6553_LDO21_REG_ADJ);
	data = (data & 0xf8) | 0x3;
	mmio_write_8(HI6553_LDO21_REG_ADJ, data);
	mmio_write_8(HI6553_ENABLE4_LDO17_22, 1 << 4);
	mdelay(5);
	/* enable LDO22 */
	data = mmio_read_8(HI6553_LDO22_REG_ADJ);
	data = (data & 0xf8) | 0x7;
	mmio_write_8(HI6553_LDO22_REG_ADJ, data);
	mmio_write_8(HI6553_ENABLE4_LDO17_22, 1 << 5);
	mdelay(5);

	/* select 32.764KHz */
	mmio_write_8(HI6553_CLK19M2_600_586_EN, 0x01);

	/* Disable vbus_det interrupts */
	data = mmio_read_8(HI6553_IRQ2_MASK);
	data = data | 0x3;
	mmio_write_8(HI6553_IRQ2_MASK, data);
}

static void init_mmc0_pll(void)
{
	unsigned int data;

	/* select SYSPLL as the source of MMC0 */
	/* select SYSPLL as the source of MUX1 (SC_CLK_SEL0) */
	mmio_write_32(PERI_SC_CLK_SEL0, 1 << 5 | 1 << 21);
	do {
		data = mmio_read_32(PERI_SC_CLK_SEL0);
	} while (!(data & (1 << 5)));
	/* select MUX1 as the source of MUX2 (SC_CLK_SEL0) */
	mmio_write_32(PERI_SC_CLK_SEL0, 1 << 29);
	do {
		data = mmio_read_32(PERI_SC_CLK_SEL0);
	} while (data & (1 << 13));

	mmio_write_32(PERI_SC_PERIPH_CLKEN0, (1 << 0));
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (!(data & (1 << 0)));

	data = mmio_read_32(PERI_SC_PERIPH_CLKEN12);
	data |= 1 << 1;
	mmio_write_32(PERI_SC_PERIPH_CLKEN12, data);

	do {
		mmio_write_32(PERI_SC_CLKCFG8BIT1, (1 << 7) | 0xb);
		data = mmio_read_32(PERI_SC_CLKCFG8BIT1);
	} while ((data & 0xb) != 0xb);
}

static void reset_mmc0_clk(void)
{
	unsigned int data;

	/* disable mmc0 bus clock */
	mmio_write_32(PERI_SC_PERIPH_CLKDIS0, PERI_CLK0_MMC0);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (data & PERI_CLK0_MMC0);
	/* enable mmc0 bus clock */
	mmio_write_32(PERI_SC_PERIPH_CLKEN0, PERI_CLK0_MMC0);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (!(data & PERI_CLK0_MMC0));
	/* reset mmc0 clock domain */
	mmio_write_32(PERI_SC_PERIPH_RSTEN0, PERI_RST0_MMC0);

	/* bypass mmc0 clock phase */
	data = mmio_read_32(PERI_SC_PERIPH_CTRL2);
	data |= 3;
	mmio_write_32(PERI_SC_PERIPH_CTRL2, data);

	/* disable low power */
	data = mmio_read_32(PERI_SC_PERIPH_CTRL13);
	data |= 1 << 3;
	mmio_write_32(PERI_SC_PERIPH_CTRL13, data);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_RSTSTAT0);
	} while (!(data & PERI_RST0_MMC0));

	/* unreset mmc0 clock domain */
	mmio_write_32(PERI_SC_PERIPH_RSTDIS0, PERI_RST0_MMC0);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_RSTSTAT0);
	} while (data & PERI_RST0_MMC0);
}

static void init_media_clk(void)
{
	unsigned int data, value;

	data = mmio_read_32(PMCTRL_MEDPLLCTRL);
	data |= 1;
	mmio_write_32(PMCTRL_MEDPLLCTRL, data);

	for (;;) {
		data = mmio_read_32(PMCTRL_MEDPLLCTRL);
		value = 1 << 28;
		if ((data & value) == value)
			break;
	}

	data = mmio_read_32(PERI_SC_PERIPH_CLKEN12);
	data = 1 << 10;
	mmio_write_32(PERI_SC_PERIPH_CLKEN12, data);
}

static void init_mmc1_pll(void)
{
	uint32_t data;

	/* select SYSPLL as the source of MMC1 */
	/* select SYSPLL as the source of MUX1 (SC_CLK_SEL0) */
	mmio_write_32(PERI_SC_CLK_SEL0, 1 << 11 | 1 << 27);
	do {
		data = mmio_read_32(PERI_SC_CLK_SEL0);
	} while (!(data & (1 << 11)));
	/* select MUX1 as the source of MUX2 (SC_CLK_SEL0) */
	mmio_write_32(PERI_SC_CLK_SEL0, 1 << 30);
	do {
		data = mmio_read_32(PERI_SC_CLK_SEL0);
	} while (data & (1 << 14));

	mmio_write_32(PERI_SC_PERIPH_CLKEN0, (1 << 1));
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (!(data & (1 << 1)));

	data = mmio_read_32(PERI_SC_PERIPH_CLKEN12);
	data |= 1 << 2;
	mmio_write_32(PERI_SC_PERIPH_CLKEN12, data);

	do {
		/* 1.2GHz / 50 = 24MHz */
		mmio_write_32(PERI_SC_CLKCFG8BIT2, 0x31 | (1 << 7));
		data = mmio_read_32(PERI_SC_CLKCFG8BIT2);
	} while ((data & 0x31) != 0x31);
}

static void reset_mmc1_clk(void)
{
	unsigned int data;

	/* disable mmc1 bus clock */
	mmio_write_32(PERI_SC_PERIPH_CLKDIS0, PERI_CLK0_MMC1);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (data & PERI_CLK0_MMC1);
	/* enable mmc1 bus clock */
	mmio_write_32(PERI_SC_PERIPH_CLKEN0, PERI_CLK0_MMC1);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_CLKSTAT0);
	} while (!(data & PERI_CLK0_MMC1));
	/* reset mmc1 clock domain */
	mmio_write_32(PERI_SC_PERIPH_RSTEN0, PERI_RST0_MMC1);

	/* bypass mmc1 clock phase */
	data = mmio_read_32(PERI_SC_PERIPH_CTRL2);
	data |= 3 << 2;
	mmio_write_32(PERI_SC_PERIPH_CTRL2, data);

	/* disable low power */
	data = mmio_read_32(PERI_SC_PERIPH_CTRL13);
	data |= 1 << 4;
	mmio_write_32(PERI_SC_PERIPH_CTRL13, data);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_RSTSTAT0);
	} while (!(data & PERI_RST0_MMC1));

	/* unreset mmc0 clock domain */
	mmio_write_32(PERI_SC_PERIPH_RSTDIS0, PERI_RST0_MMC1);
	do {
		data = mmio_read_32(PERI_SC_PERIPH_RSTSTAT0);
	} while (data & PERI_RST0_MMC1);
}

/* Initialize PLL of both eMMC and SD controllers. */
static void hikey_mmc_pll_init(void)
{
	init_mmc0_pll();
	reset_mmc0_clk();
	init_media_clk();

	dsb();

	init_mmc1_pll();
	reset_mmc1_clk();
}

static void hikey_rtc_init(void)
{
	uint32_t data;

	data = mmio_read_32(AO_SC_PERIPH_CLKEN4);
	data |= AO_SC_PERIPH_RSTDIS4_RESET_RTC0_N;
	mmio_write_32(AO_SC_PERIPH_CLKEN4, data);
}

void bl2_el3_early_platform_setup(u_register_t arg1, u_register_t arg2,
				  u_register_t arg3, u_register_t arg4)
{
	/* Initialize the console to provide early debug support */
	console_init(CONSOLE_BASE, PL011_UART_CLK_IN_HZ, PL011_BAUDRATE);
	/*
	 * Allow BL2 to see the whole Trusted RAM.
	 */
	bl2_el3_tzram_layout.total_base = BL2_RW_BASE;
	bl2_el3_tzram_layout.total_size = BL31_LIMIT - BL2_RW_BASE;
}

void bl2_el3_plat_arch_setup(void)
{
	hikey_init_mmu_el3(bl2_el3_tzram_layout.total_base,
			   bl2_el3_tzram_layout.total_size,
			   BL2_RO_BASE,
			   BL2_RO_LIMIT,
			   BL2_COHERENT_RAM_BASE,
			   BL2_COHERENT_RAM_LIMIT);
}

void bl2_platform_setup(void)
{
	dw_mmc_params_t params;

	hikey_sp804_init();
	hikey_gpio_init();
	hikey_pmussi_init();
	hikey_hi6553_init();

	dsb();
	hikey_ddr_init();
	hikey_security_setup();

	/* Clear SRAM since it'll be used by MCU right now. */
	memset((void *)SRAM_BASE, 0, SRAM_SIZE);
	clean_dcache_range(SRAM_BASE, SRAM_SIZE);

	hikey_boardid_init();
	init_acpu_dvfs();
	hikey_rtc_init();
	hikey_sd_init();
	hikey_jumper_init();

	hikey_mmc_pll_init();

	reset_dwmmc_clk();
	memset(&params, 0, sizeof(dw_mmc_params_t));
	params.reg_base = DWMMC0_BASE;
	params.desc_base = HIKEY_MMC_DESC_BASE;
	params.desc_size = 1 << 20;
	params.clk_rate = 24 * 1000 * 1000;
	params.bus_width = EMMC_BUS_WIDTH_8;
	params.flags = EMMC_FLAG_CMD23;
	dw_mmc_init(&params);

	hikey_io_setup();
}