/*
 * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>
#include <string.h>

#include <platform_def.h>

#include <arch_helpers.h>
#include <common/debug.h>
#include <drivers/io/io_block.h>
#include <drivers/io/io_driver.h>
#include <drivers/io/io_dummy.h>
#include <drivers/io/io_mtd.h>
#include <drivers/io/io_storage.h>
#include <drivers/mmc.h>
#include <drivers/partition/partition.h>
#include <drivers/raw_nand.h>
#include <drivers/spi_nand.h>
#include <drivers/spi_nor.h>
#include <drivers/st/io_mmc.h>
#include <drivers/st/io_stm32image.h>
#include <drivers/st/stm32_fmc2_nand.h>
#include <drivers/st/stm32_qspi.h>
#include <drivers/st/stm32_sdmmc2.h>
#include <lib/mmio.h>
#include <lib/utils.h>
#include <plat/common/platform.h>

/* IO devices */
#ifndef AARCH32_SP_OPTEE
static const io_dev_connector_t *dummy_dev_con;
static uintptr_t dummy_dev_handle;
static uintptr_t dummy_dev_spec;
#endif

static uintptr_t image_dev_handle;
static uintptr_t storage_dev_handle;

#if STM32MP_SDMMC || STM32MP_EMMC
static struct mmc_device_info mmc_info;
static io_block_spec_t gpt_block_spec = {
	.offset = 0,
	.length = 34 * MMC_BLOCK_SIZE, /* Size of GPT table */
};

static uint32_t block_buffer[MMC_BLOCK_SIZE] __aligned(MMC_BLOCK_SIZE);

static const io_block_dev_spec_t mmc_block_dev_spec = {
	/* It's used as temp buffer in block driver */
	.buffer = {
		.offset = (size_t)&block_buffer,
		.length = MMC_BLOCK_SIZE,
	},
	.ops = {
		.read = mmc_read_blocks,
		.write = NULL,
	},
	.block_size = MMC_BLOCK_SIZE,
};

#if STM32MP_EMMC_BOOT
static io_block_spec_t emmc_boot_ssbl_block_spec = {
	.offset = PLAT_EMMC_BOOT_SSBL_OFFSET,
	.length = MMC_BLOCK_SIZE, /* We are interested only in first 4 bytes */
};

static const io_block_dev_spec_t mmc_block_dev_boot_part_spec = {
	/* It's used as temp buffer in block driver */
	.buffer = {
		.offset = (size_t)&block_buffer,
		.length = MMC_BLOCK_SIZE,
	},
	.ops = {
		.read = mmc_boot_part_read_blocks,
		.write = NULL,
	},
	.block_size = MMC_BLOCK_SIZE,
};
#endif

static struct io_mmc_dev_spec mmc_device_spec = {
	.use_boot_part = false,
};

static const io_dev_connector_t *mmc_dev_con;
#endif /* STM32MP_SDMMC || STM32MP_EMMC */

#if STM32MP_SPI_NOR
static io_mtd_dev_spec_t spi_nor_dev_spec = {
	.ops = {
		.init = spi_nor_init,
		.read = spi_nor_read,
	},
};
#endif

#if STM32MP_RAW_NAND
static io_mtd_dev_spec_t nand_dev_spec = {
	.ops = {
		.init = nand_raw_init,
		.read = nand_read,
	},
};

static const io_dev_connector_t *nand_dev_con;
#endif

#if STM32MP_SPI_NAND
static io_mtd_dev_spec_t spi_nand_dev_spec = {
	.ops = {
		.init = spi_nand_init,
		.read = nand_read,
	},
};
#endif

#if STM32MP_SPI_NAND || STM32MP_SPI_NOR
static const io_dev_connector_t *spi_dev_con;
#endif

#ifdef AARCH32_SP_OPTEE
static const struct stm32image_part_info optee_header_partition_spec = {
	.name = OPTEE_HEADER_IMAGE_NAME,
	.binary_type = OPTEE_HEADER_BINARY_TYPE,
};

static const struct stm32image_part_info optee_core_partition_spec = {
	.name = OPTEE_CORE_IMAGE_NAME,
	.binary_type = OPTEE_CORE_BINARY_TYPE,
};

static const struct stm32image_part_info optee_paged_partition_spec = {
	.name = OPTEE_PAGED_IMAGE_NAME,
	.binary_type = OPTEE_PAGED_BINARY_TYPE,
};
#else
static const io_block_spec_t bl32_block_spec = {
	.offset = BL32_BASE,
	.length = STM32MP_BL32_SIZE
};
#endif

static const struct stm32image_part_info bl33_partition_spec = {
	.name = BL33_IMAGE_NAME,
	.binary_type = BL33_BINARY_TYPE,
};

enum {
	IMG_IDX_BL33,
#ifdef AARCH32_SP_OPTEE
	IMG_IDX_OPTEE_HEADER,
	IMG_IDX_OPTEE_CORE,
	IMG_IDX_OPTEE_PAGED,
#endif
	IMG_IDX_NUM
};

static struct stm32image_device_info stm32image_dev_info_spec __unused = {
	.lba_size = MMC_BLOCK_SIZE,
	.part_info[IMG_IDX_BL33] = {
		.name = BL33_IMAGE_NAME,
		.binary_type = BL33_BINARY_TYPE,
	},
#ifdef AARCH32_SP_OPTEE
	.part_info[IMG_IDX_OPTEE_HEADER] = {
		.name = OPTEE_HEADER_IMAGE_NAME,
		.binary_type = OPTEE_HEADER_BINARY_TYPE,
	},
	.part_info[IMG_IDX_OPTEE_CORE] = {
		.name = OPTEE_CORE_IMAGE_NAME,
		.binary_type = OPTEE_CORE_BINARY_TYPE,
	},
	.part_info[IMG_IDX_OPTEE_PAGED] = {
		.name = OPTEE_PAGED_IMAGE_NAME,
		.binary_type = OPTEE_PAGED_BINARY_TYPE,
	},
#endif
};

static io_block_spec_t stm32image_block_spec = {
	.offset = 0,
	.length = 0,
};

static const io_dev_connector_t *stm32image_dev_con __unused;

#ifndef AARCH32_SP_OPTEE
static int open_dummy(const uintptr_t spec);
#endif
static int open_image(const uintptr_t spec);
static int open_storage(const uintptr_t spec);

struct plat_io_policy {
	uintptr_t *dev_handle;
	uintptr_t image_spec;
	int (*check)(const uintptr_t spec);
};

static const struct plat_io_policy policies[] = {
#ifdef AARCH32_SP_OPTEE
	[BL32_IMAGE_ID] = {
		.dev_handle = &image_dev_handle,
		.image_spec = (uintptr_t)&optee_header_partition_spec,
		.check = open_image
	},
	[BL32_EXTRA1_IMAGE_ID] = {
		.dev_handle = &image_dev_handle,
		.image_spec = (uintptr_t)&optee_core_partition_spec,
		.check = open_image
	},
	[BL32_EXTRA2_IMAGE_ID] = {
		.dev_handle = &image_dev_handle,
		.image_spec = (uintptr_t)&optee_paged_partition_spec,
		.check = open_image
	},
#else
	[BL32_IMAGE_ID] = {
		.dev_handle = &dummy_dev_handle,
		.image_spec = (uintptr_t)&bl32_block_spec,
		.check = open_dummy
	},
#endif
	[BL33_IMAGE_ID] = {
		.dev_handle = &image_dev_handle,
		.image_spec = (uintptr_t)&bl33_partition_spec,
		.check = open_image
	},
#if STM32MP_SDMMC || STM32MP_EMMC
	[GPT_IMAGE_ID] = {
		.dev_handle = &storage_dev_handle,
		.image_spec = (uintptr_t)&gpt_block_spec,
		.check = open_storage
	},
#endif
	[STM32_IMAGE_ID] = {
		.dev_handle = &storage_dev_handle,
		.image_spec = (uintptr_t)&stm32image_block_spec,
		.check = open_storage
	}
};

#ifndef AARCH32_SP_OPTEE
static int open_dummy(const uintptr_t spec)
{
	return io_dev_init(dummy_dev_handle, 0);
}
#endif

static int open_image(const uintptr_t spec)
{
	return io_dev_init(image_dev_handle, 0);
}

static int open_storage(const uintptr_t spec)
{
	return io_dev_init(storage_dev_handle, 0);
}

#if STM32MP_EMMC_BOOT
static uint32_t get_boot_part_ssbl_header(void)
{
	uint32_t magic = 0;
	int io_result;
	size_t bytes_read;

	io_result = register_io_dev_block(&mmc_dev_con);
	if (io_result != 0) {
		panic();
	}

	io_result = io_dev_open(mmc_dev_con, (uintptr_t)&mmc_block_dev_boot_part_spec,
				&storage_dev_handle);
	assert(io_result == 0);

	io_result = io_open(storage_dev_handle, (uintptr_t) &emmc_boot_ssbl_block_spec,
			    &image_dev_handle);
	assert(io_result == 0);

	io_result = io_read(image_dev_handle, (uintptr_t) &magic, sizeof(magic),
			    &bytes_read);
	assert(io_result == 0);
	assert(bytes_read == sizeof(magic));

	io_result = io_dev_close(storage_dev_handle);
	assert(io_result == 0);

	return magic;
}
#endif

static void print_boot_device(boot_api_context_t *boot_context)
{
	switch (boot_context->boot_interface_selected) {
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_SD:
		INFO("Using SDMMC\n");
		break;
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_EMMC:
		INFO("Using EMMC\n");
		break;
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_NOR_QSPI:
		INFO("Using QSPI NOR\n");
		break;
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_NAND_FMC:
		INFO("Using FMC NAND\n");
		break;
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_NAND_QSPI:
		INFO("Using SPI NAND\n");
		break;
	default:
		ERROR("Boot interface not found\n");
		panic();
		break;
	}

	if (boot_context->boot_interface_instance != 0U) {
		INFO("  Instance %d\n", boot_context->boot_interface_instance);
	}
}

static void stm32image_io_setup(void)
{
	int io_result __unused;

	io_result = register_io_dev_stm32image(&stm32image_dev_con);
	assert(io_result == 0);

	io_result = io_dev_open(stm32image_dev_con,
				(uintptr_t)&stm32image_dev_info_spec,
				&image_dev_handle);
	assert(io_result == 0);
}

#if STM32MP_SDMMC || STM32MP_EMMC
static void boot_mmc(enum mmc_device_type mmc_dev_type,
		     uint16_t boot_interface_instance)
{
	int io_result __unused;
	uint8_t idx;
	struct stm32image_part_info *part;
	struct stm32_sdmmc2_params params;
	const partition_entry_t *entry __unused;
	uint32_t magic __unused;

	zeromem(&params, sizeof(struct stm32_sdmmc2_params));

	mmc_info.mmc_dev_type = mmc_dev_type;

	switch (boot_interface_instance) {
	case 1:
		params.reg_base = STM32MP_SDMMC1_BASE;
		break;
	case 2:
		params.reg_base = STM32MP_SDMMC2_BASE;
		break;
	case 3:
		params.reg_base = STM32MP_SDMMC3_BASE;
		break;
	default:
		WARN("SDMMC instance not found, using default\n");
		if (mmc_dev_type == MMC_IS_SD) {
			params.reg_base = STM32MP_SDMMC1_BASE;
		} else {
			params.reg_base = STM32MP_SDMMC2_BASE;
		}
		break;
	}

	params.device_info = &mmc_info;
	if (stm32_sdmmc2_mmc_init(&params) != 0) {
		ERROR("SDMMC%u init failed\n", boot_interface_instance);
		panic();
	}

	stm32image_dev_info_spec.device_size =
		stm32_sdmmc2_mmc_get_device_size();

#if STM32MP_EMMC_BOOT
	magic = get_boot_part_ssbl_header();

	if (magic == BOOT_API_IMAGE_HEADER_MAGIC_NB) {
		VERBOSE("%s, header found, jump to emmc load\n", __func__);
		idx = IMG_IDX_BL33;
		part = &stm32image_dev_info_spec.part_info[idx];
		part->part_offset = PLAT_EMMC_BOOT_SSBL_OFFSET;
		part->bkp_offset = 0U;
		mmc_device_spec.use_boot_part = true;

		goto emmc_boot;
	} else {
		WARN("%s: Can't find STM32 header on a boot partition\n", __func__);
	}
#endif

	/* Open MMC as a block device to read GPT table */
	io_result = register_io_dev_block(&mmc_dev_con);
	if (io_result != 0) {
		panic();
	}

	io_result = io_dev_open(mmc_dev_con, (uintptr_t)&mmc_block_dev_spec,
				&storage_dev_handle);
	assert(io_result == 0);

	partition_init(GPT_IMAGE_ID);

	io_result = io_dev_close(storage_dev_handle);
	assert(io_result == 0);

	for (idx = 0U; idx < IMG_IDX_NUM; idx++) {
		part = &stm32image_dev_info_spec.part_info[idx];
		entry = get_partition_entry(part->name);
		if (entry == NULL) {
			ERROR("Partition %s not found\n", part->name);
			panic();
		}

		part->part_offset = entry->start;
		part->bkp_offset = 0U;
	}

#if STM32MP_EMMC_BOOT
emmc_boot:
#endif
	/*
	 * Re-open MMC with io_mmc, for better perfs compared to
	 * io_block.
	 */
	io_result = register_io_dev_mmc(&mmc_dev_con);
	assert(io_result == 0);

	io_result = io_dev_open(mmc_dev_con, (uintptr_t)&mmc_device_spec,
				&storage_dev_handle);
	assert(io_result == 0);
}
#endif /* STM32MP_SDMMC || STM32MP_EMMC */

#if STM32MP_SPI_NOR
static void boot_spi_nor(boot_api_context_t *boot_context)
{
	int io_result __unused;
	uint8_t idx;
	struct stm32image_part_info *part;

	io_result = stm32_qspi_init();
	assert(io_result == 0);

	io_result = register_io_dev_mtd(&spi_dev_con);
	assert(io_result == 0);

	/* Open connections to device */
	io_result = io_dev_open(spi_dev_con,
				(uintptr_t)&spi_nor_dev_spec,
				&storage_dev_handle);
	assert(io_result == 0);

	stm32image_dev_info_spec.device_size = spi_nor_dev_spec.device_size;

	idx = IMG_IDX_BL33;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NOR_BL33_OFFSET;
	part->bkp_offset = 0U;

#ifdef AARCH32_SP_OPTEE
	idx = IMG_IDX_OPTEE_HEADER;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NOR_TEEH_OFFSET;
	part->bkp_offset = 0U;

	idx = IMG_IDX_OPTEE_PAGED;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NOR_TEED_OFFSET;
	part->bkp_offset = 0U;

	idx = IMG_IDX_OPTEE_CORE;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NOR_TEEX_OFFSET;
	part->bkp_offset = 0U;
#endif
}
#endif /* STM32MP_SPI_NOR */

#if STM32MP_RAW_NAND
static void boot_fmc2_nand(boot_api_context_t *boot_context)
{
	int io_result __unused;
	uint8_t idx;
	struct stm32image_part_info *part;

	io_result = stm32_fmc2_init();
	assert(io_result == 0);

	/* Register the IO device on this platform */
	io_result = register_io_dev_mtd(&nand_dev_con);
	assert(io_result == 0);

	/* Open connections to device */
	io_result = io_dev_open(nand_dev_con, (uintptr_t)&nand_dev_spec,
				&storage_dev_handle);
	assert(io_result == 0);

	stm32image_dev_info_spec.device_size = nand_dev_spec.device_size;

	idx = IMG_IDX_BL33;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_BL33_OFFSET;
	part->bkp_offset = nand_dev_spec.erase_size;

#ifdef AARCH32_SP_OPTEE
	idx = IMG_IDX_OPTEE_HEADER;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_TEEH_OFFSET;
	part->bkp_offset = nand_dev_spec.erase_size;

	idx = IMG_IDX_OPTEE_PAGED;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_TEED_OFFSET;
	part->bkp_offset = nand_dev_spec.erase_size;

	idx = IMG_IDX_OPTEE_CORE;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_TEEX_OFFSET;
	part->bkp_offset = nand_dev_spec.erase_size;
#endif
}
#endif /* STM32MP_RAW_NAND */

#if STM32MP_SPI_NAND
static void boot_spi_nand(boot_api_context_t *boot_context)
{
	int io_result __unused;
	uint8_t idx;
	struct stm32image_part_info *part;

	io_result = stm32_qspi_init();
	assert(io_result == 0);

	io_result = register_io_dev_mtd(&spi_dev_con);
	assert(io_result == 0);

	/* Open connections to device */
	io_result = io_dev_open(spi_dev_con,
				(uintptr_t)&spi_nand_dev_spec,
				&storage_dev_handle);
	assert(io_result == 0);

	stm32image_dev_info_spec.device_size =
		spi_nand_dev_spec.device_size;

	idx = IMG_IDX_BL33;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_BL33_OFFSET;
	part->bkp_offset = spi_nand_dev_spec.erase_size;

#ifdef AARCH32_SP_OPTEE
	idx = IMG_IDX_OPTEE_HEADER;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_TEEH_OFFSET;
	part->bkp_offset = spi_nand_dev_spec.erase_size;

	idx = IMG_IDX_OPTEE_PAGED;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_TEED_OFFSET;
	part->bkp_offset = spi_nand_dev_spec.erase_size;

	idx = IMG_IDX_OPTEE_CORE;
	part = &stm32image_dev_info_spec.part_info[idx];
	part->part_offset = STM32MP_NAND_TEEX_OFFSET;
	part->bkp_offset = spi_nand_dev_spec.erase_size;
#endif
}
#endif /* STM32MP_SPI_NAND */

void stm32mp_io_setup(void)
{
	int io_result __unused;
	boot_api_context_t *boot_context =
		(boot_api_context_t *)stm32mp_get_boot_ctx_address();

	print_boot_device(boot_context);

	if ((boot_context->boot_partition_used_toboot == 1U) ||
	    (boot_context->boot_partition_used_toboot == 2U)) {
		INFO("Boot used partition fsbl%d\n",
		     boot_context->boot_partition_used_toboot);
	}

#ifndef AARCH32_SP_OPTEE
	io_result = register_io_dev_dummy(&dummy_dev_con);
	assert(io_result == 0);

	io_result = io_dev_open(dummy_dev_con, dummy_dev_spec,
				&dummy_dev_handle);
	assert(io_result == 0);
#endif

	switch (boot_context->boot_interface_selected) {
#if STM32MP_SDMMC
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_SD:
		dmbsy();
		boot_mmc(MMC_IS_SD, boot_context->boot_interface_instance);
		stm32image_io_setup();
		break;
#endif
#if STM32MP_EMMC
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_EMMC:
		dmbsy();
		boot_mmc(MMC_IS_EMMC, boot_context->boot_interface_instance);
		stm32image_io_setup();
		break;
#endif
#if STM32MP_SPI_NOR
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_NOR_QSPI:
		dmbsy();
		boot_spi_nor(boot_context);
		stm32image_io_setup();
		break;
#endif
#if STM32MP_RAW_NAND
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_NAND_FMC:
		dmbsy();
		boot_fmc2_nand(boot_context);
		stm32image_io_setup();
		break;
#endif
#if STM32MP_SPI_NAND
	case BOOT_API_CTX_BOOT_INTERFACE_SEL_FLASH_NAND_QSPI:
		dmbsy();
		boot_spi_nand(boot_context);
		stm32image_io_setup();
		break;
#endif

	default:
		ERROR("Boot interface %d not supported\n",
		      boot_context->boot_interface_selected);
		panic();
		break;
	}
}

/*
 * Return an IO device handle and specification which can be used to access
 * an image. Use this to enforce platform load policy.
 */
int plat_get_image_source(unsigned int image_id, uintptr_t *dev_handle,
			  uintptr_t *image_spec)
{
	int rc;
	const struct plat_io_policy *policy;

	assert(image_id < ARRAY_SIZE(policies));

	policy = &policies[image_id];
	rc = policy->check(policy->image_spec);
	if (rc == 0) {
		*image_spec = policy->image_spec;
		*dev_handle = *(policy->dev_handle);
	}

	return rc;
}