plat/socionext/uniphier/uniphier_nand.c - filogic/atf - Gitiles

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

 #include <arch_helpers.h>
 #include <debug.h>
 #include <io/io_block.h>
 #include <mmio.h>
 #include <platform_def.h>
 #include <sys/types.h>
 #include <utils_def.h>

 #include "uniphier.h"

 #define DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))

 #define NAND_CMD_READ0		0
 #define NAND_CMD_READSTART	0x30

 #define DENALI_ECC_ENABLE			0x0e0
 #define DENALI_PAGES_PER_BLOCK			0x150
 #define DENALI_DEVICE_MAIN_AREA_SIZE		0x170
 #define DENALI_DEVICE_SPARE_AREA_SIZE		0x180
 #define DENALI_TWO_ROW_ADDR_CYCLES		0x190
 #define DENALI_INTR_STATUS0			0x410
 #define   DENALI_INTR_ECC_UNCOR_ERR			BIT(1)
 #define   DENALI_INTR_DMA_CMD_COMP			BIT(2)
 #define   DENALI_INTR_INT_ACT				BIT(12)

 #define DENALI_DMA_ENABLE			0x700

 #define DENALI_HOST_ADDR			0x00
 #define DENALI_HOST_DATA			0x10

 #define DENALI_MAP01				(1 << 26)
 #define DENALI_MAP10				(2 << 26)
 #define DENALI_MAP11				(3 << 26)

 #define DENALI_MAP11_CMD			((DENALI_MAP11) | 0)
 #define DENALI_MAP11_ADDR			((DENALI_MAP11) | 1)
 #define DENALI_MAP11_DATA			((DENALI_MAP11) | 2)

 #define DENALI_ACCESS_DEFAULT_AREA		0x42

 #define UNIPHIER_NAND_BBT_UNKNOWN		0xff

 struct uniphier_nand {
 	uintptr_t host_base;
 	uintptr_t reg_base;
 	int pages_per_block;
 	int page_size;
 	int two_row_addr_cycles;
 	uint8_t bbt[16];
 };

 struct uniphier_nand uniphier_nand;

 static void uniphier_nand_host_write(struct uniphier_nand *nand,
 				     uint32_t addr, uint32_t data)
 {
 	mmio_write_32(nand->host_base + DENALI_HOST_ADDR, addr);
 	mmio_write_32(nand->host_base + DENALI_HOST_DATA, data);
 }

 static uint32_t uniphier_nand_host_read(struct uniphier_nand *nand,
 					uint32_t addr)
 {
 	mmio_write_32(nand->host_base + DENALI_HOST_ADDR, addr);
 	return mmio_read_32(nand->host_base + DENALI_HOST_DATA);
 }

 static int uniphier_nand_block_isbad(struct uniphier_nand *nand, int block)
 {
 	int page = nand->pages_per_block * block;
 	int column = nand->page_size;
 	uint8_t bbm;
 	uint32_t status;
 	int is_bad;

 	/* use cache if available */
 	if (block < ARRAY_SIZE(nand->bbt) &&
 	    nand->bbt[block] != UNIPHIER_NAND_BBT_UNKNOWN)
 		return nand->bbt[block];

 	mmio_write_32(nand->reg_base + DENALI_ECC_ENABLE, 0);

 	mmio_write_32(nand->reg_base + DENALI_INTR_STATUS0, -1);

 	uniphier_nand_host_write(nand, DENALI_MAP11_CMD, NAND_CMD_READ0);
 	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, column & 0xff);
 	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, (column >> 8) & 0xff);
 	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, page & 0xff);
 	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, (page >> 8) & 0xff);
 	if (!nand->two_row_addr_cycles)
 		uniphier_nand_host_write(nand, DENALI_MAP11_ADDR,
 					 (page >> 16) & 0xff);
 	uniphier_nand_host_write(nand, DENALI_MAP11_CMD, NAND_CMD_READSTART);

 	do {
 		status = mmio_read_32(nand->reg_base + DENALI_INTR_STATUS0);
 	} while (!(status & DENALI_INTR_INT_ACT));

 	bbm = uniphier_nand_host_read(nand, DENALI_MAP11_DATA);

 	is_bad = bbm != 0xff;

 	/* save the result for future re-use */
 	nand->bbt[block] = is_bad;

 	if (is_bad)
 		WARN("found bad block at %d. skip.\n", block);

 	return is_bad;
 }

 static int uniphier_nand_read_pages(struct uniphier_nand *nand, uintptr_t buf,
 				    int page_start, int page_count)
 {
 	uint32_t status;

 	mmio_write_32(nand->reg_base + DENALI_ECC_ENABLE, 1);
 	mmio_write_32(nand->reg_base + DENALI_DMA_ENABLE, 1);

 	mmio_write_32(nand->reg_base + DENALI_INTR_STATUS0, -1);

 	/* use Data DMA (64bit) */
 	mmio_write_32(nand->host_base + DENALI_HOST_ADDR,
 		      DENALI_MAP10 | page_start);

 	/*
 	 * 1. setup transfer type, interrupt when complete,
 	 *    burst len = 64 bytes, the number of pages
 	 */
 	mmio_write_32(nand->host_base + DENALI_HOST_DATA,
 		      0x01002000 | (64 << 16) | page_count);

 	/* 2. set memory low address */
 	mmio_write_32(nand->host_base + DENALI_HOST_DATA, buf);

 	/* 3. set memory high address */
 	mmio_write_32(nand->host_base + DENALI_HOST_DATA, buf >> 32);

 	do {
 		status = mmio_read_32(nand->reg_base + DENALI_INTR_STATUS0);
 	} while (!(status & DENALI_INTR_DMA_CMD_COMP));

 	mmio_write_32(nand->reg_base + DENALI_DMA_ENABLE, 0);

 	if (status & DENALI_INTR_ECC_UNCOR_ERR) {
 		ERROR("uncorrectable error in page range %d-%d",
 		      page_start, page_start + page_count - 1);
 		return -EBADMSG;
 	}

 	return 0;
 }

 static size_t __uniphier_nand_read(struct uniphier_nand *nand, int lba,
 				   uintptr_t buf, size_t size)
 {
 	int pages_per_block = nand->pages_per_block;
 	int page_size = nand->page_size;
 	int blocks_to_skip = lba / pages_per_block;
 	int pages_to_read = DIV_ROUND_UP(size, page_size);
 	int page = lba % pages_per_block;
 	int block = 0;
 	uintptr_t p = buf;
 	int page_count, ret;

 	while (blocks_to_skip) {
 		ret = uniphier_nand_block_isbad(nand, block);
 		if (ret < 0)
 			goto out;

 		if (!ret)
 			blocks_to_skip--;

 		block++;
 	}

 	while (pages_to_read) {
 		ret = uniphier_nand_block_isbad(nand, block);
 		if (ret < 0)
 			goto out;

 		if (ret) {
 			block++;
 			continue;
 		}

 		page_count = MIN(pages_per_block - page, pages_to_read);

 		ret = uniphier_nand_read_pages(nand, p,
 					       block * pages_per_block + page,
 					       page_count);
 		if (ret)
 			goto out;

 		block++;
 		page = 0;
 		p += page_size * page_count;
 		pages_to_read -= page_count;
 	}

 out:
 	/* number of read bytes */
 	return MIN(size, p - buf);
 }

 static size_t uniphier_nand_read(int lba, uintptr_t buf, size_t size)
 {
 	size_t count;

 	inv_dcache_range(buf, size);

 	count = __uniphier_nand_read(&uniphier_nand, lba, buf, size);

 	inv_dcache_range(buf, size);

 	return count;
 }

 static struct io_block_dev_spec uniphier_nand_dev_spec = {
 	.buffer = {
 		.offset = UNIPHIER_BLOCK_BUF_BASE,
 		.length = UNIPHIER_BLOCK_BUF_SIZE,
 	},
 	.ops = {
 		.read = uniphier_nand_read,
 	},
 	/* fill .block_size at run-time */
 };

 static int uniphier_nand_hw_init(struct uniphier_nand *nand)
 {
 	int i;

 	for (i = 0; i < ARRAY_SIZE(nand->bbt); i++)
 		nand->bbt[i] = UNIPHIER_NAND_BBT_UNKNOWN;

 	nand->host_base = 0x68000000;
 	nand->reg_base = 0x68100000;

 	nand->pages_per_block =
 			mmio_read_32(nand->reg_base + DENALI_PAGES_PER_BLOCK);

 	nand->page_size =
 		mmio_read_32(nand->reg_base + DENALI_DEVICE_MAIN_AREA_SIZE);

 	if (mmio_read_32(nand->reg_base + DENALI_TWO_ROW_ADDR_CYCLES) & BIT(0))
 		nand->two_row_addr_cycles = 1;

 	uniphier_nand_host_write(nand, DENALI_MAP10,
 				 DENALI_ACCESS_DEFAULT_AREA);

 	return 0;
 }

 int uniphier_nand_init(uintptr_t *block_dev_spec)
 {
 	int ret;

 	ret = uniphier_nand_hw_init(&uniphier_nand);
 	if (ret)
 		return ret;

 	uniphier_nand_dev_spec.block_size = uniphier_nand.page_size;

 	*block_dev_spec = (uintptr_t)&uniphier_nand_dev_spec;

 	return 0;
 }
	/*
	* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#include <arch_helpers.h>
	#include <debug.h>
	#include <io/io_block.h>
	#include <mmio.h>
	#include <platform_def.h>
	#include <sys/types.h>
	#include <utils_def.h>

	#include "uniphier.h"

	#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))

	#define NAND_CMD_READ0 0
	#define NAND_CMD_READSTART 0x30

	#define DENALI_ECC_ENABLE 0x0e0
	#define DENALI_PAGES_PER_BLOCK 0x150
	#define DENALI_DEVICE_MAIN_AREA_SIZE 0x170
	#define DENALI_DEVICE_SPARE_AREA_SIZE 0x180
	#define DENALI_TWO_ROW_ADDR_CYCLES 0x190
	#define DENALI_INTR_STATUS0 0x410
	#define DENALI_INTR_ECC_UNCOR_ERR BIT(1)
	#define DENALI_INTR_DMA_CMD_COMP BIT(2)
	#define DENALI_INTR_INT_ACT BIT(12)

	#define DENALI_DMA_ENABLE 0x700

	#define DENALI_HOST_ADDR 0x00
	#define DENALI_HOST_DATA 0x10

	#define DENALI_MAP01 (1 << 26)
	#define DENALI_MAP10 (2 << 26)
	#define DENALI_MAP11 (3 << 26)

	#define DENALI_MAP11_CMD ((DENALI_MAP11) \| 0)
	#define DENALI_MAP11_ADDR ((DENALI_MAP11) \| 1)
	#define DENALI_MAP11_DATA ((DENALI_MAP11) \| 2)

	#define DENALI_ACCESS_DEFAULT_AREA 0x42

	#define UNIPHIER_NAND_BBT_UNKNOWN 0xff

	struct uniphier_nand {
	uintptr_t host_base;
	uintptr_t reg_base;
	int pages_per_block;
	int page_size;
	int two_row_addr_cycles;
	uint8_t bbt[16];
	};

	struct uniphier_nand uniphier_nand;

	static void uniphier_nand_host_write(struct uniphier_nand *nand,
	uint32_t addr, uint32_t data)
	{
	mmio_write_32(nand->host_base + DENALI_HOST_ADDR, addr);
	mmio_write_32(nand->host_base + DENALI_HOST_DATA, data);
	}

	static uint32_t uniphier_nand_host_read(struct uniphier_nand *nand,
	uint32_t addr)
	{
	mmio_write_32(nand->host_base + DENALI_HOST_ADDR, addr);
	return mmio_read_32(nand->host_base + DENALI_HOST_DATA);
	}

	static int uniphier_nand_block_isbad(struct uniphier_nand *nand, int block)
	{
	int page = nand->pages_per_block * block;
	int column = nand->page_size;
	uint8_t bbm;
	uint32_t status;
	int is_bad;

	/* use cache if available */
	if (block < ARRAY_SIZE(nand->bbt) &&
	nand->bbt[block] != UNIPHIER_NAND_BBT_UNKNOWN)
	return nand->bbt[block];

	mmio_write_32(nand->reg_base + DENALI_ECC_ENABLE, 0);

	mmio_write_32(nand->reg_base + DENALI_INTR_STATUS0, -1);

	uniphier_nand_host_write(nand, DENALI_MAP11_CMD, NAND_CMD_READ0);
	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, column & 0xff);
	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, (column >> 8) & 0xff);
	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, page & 0xff);
	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR, (page >> 8) & 0xff);
	if (!nand->two_row_addr_cycles)
	uniphier_nand_host_write(nand, DENALI_MAP11_ADDR,
	(page >> 16) & 0xff);
	uniphier_nand_host_write(nand, DENALI_MAP11_CMD, NAND_CMD_READSTART);

	do {
	status = mmio_read_32(nand->reg_base + DENALI_INTR_STATUS0);
	} while (!(status & DENALI_INTR_INT_ACT));

	bbm = uniphier_nand_host_read(nand, DENALI_MAP11_DATA);

	is_bad = bbm != 0xff;

	/* save the result for future re-use */
	nand->bbt[block] = is_bad;

	if (is_bad)
	WARN("found bad block at %d. skip.\n", block);

	return is_bad;
	}

	static int uniphier_nand_read_pages(struct uniphier_nand *nand, uintptr_t buf,
	int page_start, int page_count)
	{
	uint32_t status;

	mmio_write_32(nand->reg_base + DENALI_ECC_ENABLE, 1);
	mmio_write_32(nand->reg_base + DENALI_DMA_ENABLE, 1);

	mmio_write_32(nand->reg_base + DENALI_INTR_STATUS0, -1);

	/* use Data DMA (64bit) */
	mmio_write_32(nand->host_base + DENALI_HOST_ADDR,
	DENALI_MAP10 \| page_start);

	/*
	* 1. setup transfer type, interrupt when complete,
	* burst len = 64 bytes, the number of pages
	*/
	mmio_write_32(nand->host_base + DENALI_HOST_DATA,
	0x01002000 \| (64 << 16) \| page_count);

	/* 2. set memory low address */
	mmio_write_32(nand->host_base + DENALI_HOST_DATA, buf);

	/* 3. set memory high address */
	mmio_write_32(nand->host_base + DENALI_HOST_DATA, buf >> 32);

	do {
	status = mmio_read_32(nand->reg_base + DENALI_INTR_STATUS0);
	} while (!(status & DENALI_INTR_DMA_CMD_COMP));

	mmio_write_32(nand->reg_base + DENALI_DMA_ENABLE, 0);

	if (status & DENALI_INTR_ECC_UNCOR_ERR) {
	ERROR("uncorrectable error in page range %d-%d",
	page_start, page_start + page_count - 1);
	return -EBADMSG;
	}

	return 0;
	}

	static size_t __uniphier_nand_read(struct uniphier_nand *nand, int lba,
	uintptr_t buf, size_t size)
	{
	int pages_per_block = nand->pages_per_block;
	int page_size = nand->page_size;
	int blocks_to_skip = lba / pages_per_block;
	int pages_to_read = DIV_ROUND_UP(size, page_size);
	int page = lba % pages_per_block;
	int block = 0;
	uintptr_t p = buf;
	int page_count, ret;

	while (blocks_to_skip) {
	ret = uniphier_nand_block_isbad(nand, block);
	if (ret < 0)
	goto out;

	if (!ret)
	blocks_to_skip--;

	block++;
	}

	while (pages_to_read) {
	ret = uniphier_nand_block_isbad(nand, block);
	if (ret < 0)
	goto out;

	if (ret) {
	block++;
	continue;
	}

	page_count = MIN(pages_per_block - page, pages_to_read);

	ret = uniphier_nand_read_pages(nand, p,
	block * pages_per_block + page,
	page_count);
	if (ret)
	goto out;

	block++;
	page = 0;
	p += page_size * page_count;
	pages_to_read -= page_count;
	}

	out:
	/* number of read bytes */
	return MIN(size, p - buf);
	}

	static size_t uniphier_nand_read(int lba, uintptr_t buf, size_t size)
	{
	size_t count;

	inv_dcache_range(buf, size);

	count = __uniphier_nand_read(&uniphier_nand, lba, buf, size);

	inv_dcache_range(buf, size);

	return count;
	}

	static struct io_block_dev_spec uniphier_nand_dev_spec = {
	.buffer = {
	.offset = UNIPHIER_BLOCK_BUF_BASE,
	.length = UNIPHIER_BLOCK_BUF_SIZE,
	},
	.ops = {
	.read = uniphier_nand_read,
	},
	/* fill .block_size at run-time */
	};

	static int uniphier_nand_hw_init(struct uniphier_nand *nand)
	{
	int i;

	for (i = 0; i < ARRAY_SIZE(nand->bbt); i++)
	nand->bbt[i] = UNIPHIER_NAND_BBT_UNKNOWN;

	nand->host_base = 0x68000000;
	nand->reg_base = 0x68100000;

	nand->pages_per_block =
	mmio_read_32(nand->reg_base + DENALI_PAGES_PER_BLOCK);

	nand->page_size =
	mmio_read_32(nand->reg_base + DENALI_DEVICE_MAIN_AREA_SIZE);

	if (mmio_read_32(nand->reg_base + DENALI_TWO_ROW_ADDR_CYCLES) & BIT(0))
	nand->two_row_addr_cycles = 1;

	uniphier_nand_host_write(nand, DENALI_MAP10,
	DENALI_ACCESS_DEFAULT_AREA);

	return 0;
	}

	int uniphier_nand_init(uintptr_t *block_dev_spec)
	{
	int ret;

	ret = uniphier_nand_hw_init(&uniphier_nand);
	if (ret)
	return ret;

	uniphier_nand_dev_spec.block_size = uniphier_nand.page_size;

	*block_dev_spec = (uintptr_t)&uniphier_nand_dev_spec;

	return 0;
	}