// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hisilicon NAND Flash controller driver
*
* Copyright © 2012 - 2014 HiSilicon Technologies Co . , Ltd .
* http : //www.hisilicon.com
*
* Author : Zhou Wang < wangzhou . bry @ gmail . com >
* The initial developer of the original code is Zhiyong Cai
* < caizhiyong @ huawei . com >
*/
#include <linux/of.h>
#include <linux/mtd/mtd.h>
#include <linux/sizes.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mtd/rawnand.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#define HINFC504_MAX_CHIP (4 )
#define HINFC504_W_LATCH (5 )
#define HINFC504_R_LATCH (7 )
#define HINFC504_RW_LATCH (3 )
#define HINFC504_NFC_TIMEOUT (2 * HZ)
#define HINFC504_NFC_PM_TIMEOUT (1 * HZ)
#define HINFC504_NFC_DMA_TIMEOUT (5 * HZ)
#define HINFC504_CHIP_DELAY (25 )
#define HINFC504_REG_BASE_ADDRESS_LEN (0 x100)
#define HINFC504_BUFFER_BASE_ADDRESS_LEN (2048 + 128 )
#define HINFC504_ADDR_CYCLE_MASK 0 x4
#define HINFC504_CON 0 x00
#define HINFC504_CON_OP_MODE_NORMAL BIT(0 )
#define HINFC504_CON_PAGEISZE_SHIFT (1 )
#define HINFC504_CON_PAGESIZE_MASK (0 x07)
#define HINFC504_CON_BUS_WIDTH BIT(4 )
#define HINFC504_CON_READY_BUSY_SEL BIT(8 )
#define HINFC504_CON_ECCTYPE_SHIFT (9 )
#define HINFC504_CON_ECCTYPE_MASK (0 x07)
#define HINFC504_PWIDTH 0 x04
#define SET_HINFC504_PWIDTH(_w_lcnt, _r_lcnt, _rw_hcnt) \
((_w_lcnt) | (((_r_lcnt) & 0 x0F) << 4 ) | (((_rw_hcnt) & 0 x0F) << 8 ))
#define HINFC504_CMD 0 x0C
#define HINFC504_ADDRL 0 x10
#define HINFC504_ADDRH 0 x14
#define HINFC504_DATA_NUM 0 x18
#define HINFC504_OP 0 x1C
#define HINFC504_OP_READ_DATA_EN BIT(1 )
#define HINFC504_OP_WAIT_READY_EN BIT(2 )
#define HINFC504_OP_CMD2_EN BIT(3 )
#define HINFC504_OP_WRITE_DATA_EN BIT(4 )
#define HINFC504_OP_ADDR_EN BIT(5 )
#define HINFC504_OP_CMD1_EN BIT(6 )
#define HINFC504_OP_NF_CS_SHIFT (7 )
#define HINFC504_OP_NF_CS_MASK (3 )
#define HINFC504_OP_ADDR_CYCLE_SHIFT (9 )
#define HINFC504_OP_ADDR_CYCLE_MASK (7 )
#define HINFC504_STATUS 0 x20
#define HINFC504_READY BIT(0 )
#define HINFC504_INTEN 0 x24
#define HINFC504_INTEN_DMA BIT(9 )
#define HINFC504_INTEN_UE BIT(6 )
#define HINFC504_INTEN_CE BIT(5 )
#define HINFC504_INTS 0 x28
#define HINFC504_INTS_DMA BIT(9 )
#define HINFC504_INTS_UE BIT(6 )
#define HINFC504_INTS_CE BIT(5 )
#define HINFC504_INTCLR 0 x2C
#define HINFC504_INTCLR_DMA BIT(9 )
#define HINFC504_INTCLR_UE BIT(6 )
#define HINFC504_INTCLR_CE BIT(5 )
#define HINFC504_ECC_STATUS 0 x5C
#define HINFC504_ECC_16_BIT_SHIFT 12
#define HINFC504_DMA_CTRL 0 x60
#define HINFC504_DMA_CTRL_DMA_START BIT(0 )
#define HINFC504_DMA_CTRL_WE BIT(1 )
#define HINFC504_DMA_CTRL_DATA_AREA_EN BIT(2 )
#define HINFC504_DMA_CTRL_OOB_AREA_EN BIT(3 )
#define HINFC504_DMA_CTRL_BURST4_EN BIT(4 )
#define HINFC504_DMA_CTRL_BURST8_EN BIT(5 )
#define HINFC504_DMA_CTRL_BURST16_EN BIT(6 )
#define HINFC504_DMA_CTRL_ADDR_NUM_SHIFT (7 )
#define HINFC504_DMA_CTRL_ADDR_NUM_MASK (1 )
#define HINFC504_DMA_CTRL_CS_SHIFT (8 )
#define HINFC504_DMA_CTRL_CS_MASK (0 x03)
#define HINFC504_DMA_ADDR_DATA 0 x64
#define HINFC504_DMA_ADDR_OOB 0 x68
#define HINFC504_DMA_LEN 0 x6C
#define HINFC504_DMA_LEN_OOB_SHIFT (16 )
#define HINFC504_DMA_LEN_OOB_MASK (0 xFFF)
#define HINFC504_DMA_PARA 0 x70
#define HINFC504_DMA_PARA_DATA_RW_EN BIT(0 )
#define HINFC504_DMA_PARA_OOB_RW_EN BIT(1 )
#define HINFC504_DMA_PARA_DATA_EDC_EN BIT(2 )
#define HINFC504_DMA_PARA_OOB_EDC_EN BIT(3 )
#define HINFC504_DMA_PARA_DATA_ECC_EN BIT(4 )
#define HINFC504_DMA_PARA_OOB_ECC_EN BIT(5 )
#define HINFC_VERSION 0 x74
#define HINFC504_LOG_READ_ADDR 0 x7C
#define HINFC504_LOG_READ_LEN 0 x80
#define HINFC504_NANDINFO_LEN 0 x10
struct hinfc_host {
struct nand_chip chip;
struct device *dev;
void __iomem *iobase;
void __iomem *mmio;
struct completion cmd_complete;
unsigned int offset;
unsigned int command;
int chipselect;
unsigned int addr_cycle;
u32 addr_value[2 ];
u32 cache_addr_value[2 ];
char *buffer;
dma_addr_t dma_buffer;
dma_addr_t dma_oob;
int version;
unsigned int irq_status; /* interrupt status */
};
static inline unsigned int hinfc_read(struct hinfc_host *host, unsigned int reg)
{
return readl(host->iobase + reg);
}
static inline void hinfc_write(struct hinfc_host *host, unsigned int value,
unsigned int reg)
{
writel(value, host->iobase + reg);
}
static void wait_controller_finished(struct hinfc_host *host)
{
unsigned long timeout = jiffies + HINFC504_NFC_TIMEOUT;
int val;
while (time_before(jiffies, timeout)) {
val = hinfc_read(host, HINFC504_STATUS);
if (host->command == NAND_CMD_ERASE2) {
/* nfc is ready */
while (!(val & HINFC504_READY)) {
usleep_range(500 , 1000 );
val = hinfc_read(host, HINFC504_STATUS);
}
return ;
}
if (val & HINFC504_READY)
return ;
}
/* wait cmd timeout */
dev_err(host->dev, "Wait NAND controller exec cmd timeout.\n" );
}
static void hisi_nfc_dma_transfer(struct hinfc_host *host, int todev)
{
struct nand_chip *chip = &host->chip;
struct mtd_info *mtd = nand_to_mtd(chip);
unsigned long val;
int ret;
hinfc_write(host, host->dma_buffer, HINFC504_DMA_ADDR_DATA);
hinfc_write(host, host->dma_oob, HINFC504_DMA_ADDR_OOB);
if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_NONE) {
hinfc_write(host, ((mtd->oobsize & HINFC504_DMA_LEN_OOB_MASK)
<< HINFC504_DMA_LEN_OOB_SHIFT), HINFC504_DMA_LEN);
hinfc_write(host, HINFC504_DMA_PARA_DATA_RW_EN
| HINFC504_DMA_PARA_OOB_RW_EN, HINFC504_DMA_PARA);
} else {
if (host->command == NAND_CMD_READOOB)
hinfc_write(host, HINFC504_DMA_PARA_OOB_RW_EN
| HINFC504_DMA_PARA_OOB_EDC_EN
| HINFC504_DMA_PARA_OOB_ECC_EN, HINFC504_DMA_PARA);
else
hinfc_write(host, HINFC504_DMA_PARA_DATA_RW_EN
| HINFC504_DMA_PARA_OOB_RW_EN
| HINFC504_DMA_PARA_DATA_EDC_EN
| HINFC504_DMA_PARA_OOB_EDC_EN
| HINFC504_DMA_PARA_DATA_ECC_EN
| HINFC504_DMA_PARA_OOB_ECC_EN, HINFC504_DMA_PARA);
}
val = (HINFC504_DMA_CTRL_DMA_START | HINFC504_DMA_CTRL_BURST4_EN
| HINFC504_DMA_CTRL_BURST8_EN | HINFC504_DMA_CTRL_BURST16_EN
| HINFC504_DMA_CTRL_DATA_AREA_EN | HINFC504_DMA_CTRL_OOB_AREA_EN
| ((host->addr_cycle == 4 ? 1 : 0 )
<< HINFC504_DMA_CTRL_ADDR_NUM_SHIFT)
| ((host->chipselect & HINFC504_DMA_CTRL_CS_MASK)
<< HINFC504_DMA_CTRL_CS_SHIFT));
if (todev)
val |= HINFC504_DMA_CTRL_WE;
init_completion(&host->cmd_complete);
hinfc_write(host, val, HINFC504_DMA_CTRL);
ret = wait_for_completion_timeout(&host->cmd_complete,
HINFC504_NFC_DMA_TIMEOUT);
if (!ret) {
dev_err(host->dev, "DMA operation(irq) timeout!\n" );
/* sanity check */
val = hinfc_read(host, HINFC504_DMA_CTRL);
if (!(val & HINFC504_DMA_CTRL_DMA_START))
dev_err(host->dev, "DMA is already done but without irq ACK!\n" );
else
dev_err(host->dev, "DMA is really timeout!\n" );
}
}
static int hisi_nfc_send_cmd_pageprog(struct hinfc_host *host)
{
host->addr_value[0 ] &= 0 xffff0000;
hinfc_write(host, host->addr_value[0 ], HINFC504_ADDRL);
hinfc_write(host, host->addr_value[1 ], HINFC504_ADDRH);
hinfc_write(host, NAND_CMD_PAGEPROG << 8 | NAND_CMD_SEQIN,
HINFC504_CMD);
hisi_nfc_dma_transfer(host, 1 );
return 0 ;
}
static int hisi_nfc_send_cmd_readstart(struct hinfc_host *host)
{
struct mtd_info *mtd = nand_to_mtd(&host->chip);
if ((host->addr_value[0 ] == host->cache_addr_value[0 ]) &&
(host->addr_value[1 ] == host->cache_addr_value[1 ]))
return 0 ;
host->addr_value[0 ] &= 0 xffff0000;
hinfc_write(host, host->addr_value[0 ], HINFC504_ADDRL);
hinfc_write(host, host->addr_value[1 ], HINFC504_ADDRH);
hinfc_write(host, NAND_CMD_READSTART << 8 | NAND_CMD_READ0,
HINFC504_CMD);
hinfc_write(host, 0 , HINFC504_LOG_READ_ADDR);
hinfc_write(host, mtd->writesize + mtd->oobsize,
HINFC504_LOG_READ_LEN);
hisi_nfc_dma_transfer(host, 0 );
host->cache_addr_value[0 ] = host->addr_value[0 ];
host->cache_addr_value[1 ] = host->addr_value[1 ];
return 0 ;
}
static int hisi_nfc_send_cmd_erase(struct hinfc_host *host)
{
hinfc_write(host, host->addr_value[0 ], HINFC504_ADDRL);
hinfc_write(host, (NAND_CMD_ERASE2 << 8 ) | NAND_CMD_ERASE1,
HINFC504_CMD);
hinfc_write(host, HINFC504_OP_WAIT_READY_EN
| HINFC504_OP_CMD2_EN
| HINFC504_OP_CMD1_EN
| HINFC504_OP_ADDR_EN
| ((host->chipselect & HINFC504_OP_NF_CS_MASK)
<< HINFC504_OP_NF_CS_SHIFT)
| ((host->addr_cycle & HINFC504_OP_ADDR_CYCLE_MASK)
<< HINFC504_OP_ADDR_CYCLE_SHIFT),
HINFC504_OP);
wait_controller_finished(host);
return 0 ;
}
static int hisi_nfc_send_cmd_readid(struct hinfc_host *host)
{
hinfc_write(host, HINFC504_NANDINFO_LEN, HINFC504_DATA_NUM);
hinfc_write(host, NAND_CMD_READID, HINFC504_CMD);
hinfc_write(host, 0 , HINFC504_ADDRL);
hinfc_write(host, HINFC504_OP_CMD1_EN | HINFC504_OP_ADDR_EN
| HINFC504_OP_READ_DATA_EN
| ((host->chipselect & HINFC504_OP_NF_CS_MASK)
<< HINFC504_OP_NF_CS_SHIFT)
| 1 << HINFC504_OP_ADDR_CYCLE_SHIFT, HINFC504_OP);
wait_controller_finished(host);
return 0 ;
}
static int hisi_nfc_send_cmd_status(struct hinfc_host *host)
{
hinfc_write(host, HINFC504_NANDINFO_LEN, HINFC504_DATA_NUM);
hinfc_write(host, NAND_CMD_STATUS, HINFC504_CMD);
hinfc_write(host, HINFC504_OP_CMD1_EN
| HINFC504_OP_READ_DATA_EN
| ((host->chipselect & HINFC504_OP_NF_CS_MASK)
<< HINFC504_OP_NF_CS_SHIFT),
HINFC504_OP);
wait_controller_finished(host);
return 0 ;
}
static int hisi_nfc_send_cmd_reset(struct hinfc_host *host, int chipselect)
{
hinfc_write(host, NAND_CMD_RESET, HINFC504_CMD);
hinfc_write(host, HINFC504_OP_CMD1_EN
| ((chipselect & HINFC504_OP_NF_CS_MASK)
<< HINFC504_OP_NF_CS_SHIFT)
| HINFC504_OP_WAIT_READY_EN,
HINFC504_OP);
wait_controller_finished(host);
return 0 ;
}
static void hisi_nfc_select_chip(struct nand_chip *chip, int chipselect)
{
struct hinfc_host *host = nand_get_controller_data(chip);
if (chipselect < 0 )
return ;
host->chipselect = chipselect;
}
static uint8_t hisi_nfc_read_byte(struct nand_chip *chip)
{
struct hinfc_host *host = nand_get_controller_data(chip);
if (host->command == NAND_CMD_STATUS)
return *(uint8_t *)(host->mmio);
host->offset++;
if (host->command == NAND_CMD_READID)
return *(uint8_t *)(host->mmio + host->offset - 1 );
return *(uint8_t *)(host->buffer + host->offset - 1 );
}
static void
hisi_nfc_write_buf(struct nand_chip *chip, const uint8_t *buf, int len)
{
struct hinfc_host *host = nand_get_controller_data(chip);
memcpy(host->buffer + host->offset, buf, len);
host->offset += len;
}
static void hisi_nfc_read_buf(struct nand_chip *chip, uint8_t *buf, int len)
{
struct hinfc_host *host = nand_get_controller_data(chip);
memcpy(buf, host->buffer + host->offset, len);
host->offset += len;
}
static void set_addr(struct mtd_info *mtd, int column, int page_addr)
{
struct nand_chip *chip = mtd_to_nand(mtd);
struct hinfc_host *host = nand_get_controller_data(chip);
unsigned int command = host->command;
host->addr_cycle = 0 ;
host->addr_value[0 ] = 0 ;
host->addr_value[1 ] = 0 ;
/* Serially input address */
if (column != -1 ) {
/* Adjust columns for 16 bit buswidth */
if (chip->options & NAND_BUSWIDTH_16 &&
!nand_opcode_8bits(command))
column >>= 1 ;
host->addr_value[0 ] = column & 0 xffff;
host->addr_cycle = 2 ;
}
if (page_addr != -1 ) {
host->addr_value[0 ] |= (page_addr & 0 xffff)
<< (host->addr_cycle * 8 );
host->addr_cycle += 2 ;
if (chip->options & NAND_ROW_ADDR_3) {
host->addr_cycle += 1 ;
if (host->command == NAND_CMD_ERASE1)
host->addr_value[0 ] |= ((page_addr >> 16 ) & 0 xff) << 16 ;
else
host->addr_value[1 ] |= ((page_addr >> 16 ) & 0 xff);
}
}
}
static void hisi_nfc_cmdfunc(struct nand_chip *chip, unsigned command,
int column, int page_addr)
{
struct mtd_info *mtd = nand_to_mtd(chip);
struct hinfc_host *host = nand_get_controller_data(chip);
int is_cache_invalid = 1 ;
unsigned int flag = 0 ;
host->command = command;
switch (command) {
case NAND_CMD_READ0:
case NAND_CMD_READOOB:
if (command == NAND_CMD_READ0)
host->offset = column;
else
host->offset = column + mtd->writesize;
is_cache_invalid = 0 ;
set_addr(mtd, column, page_addr);
hisi_nfc_send_cmd_readstart(host);
break ;
case NAND_CMD_SEQIN:
host->offset = column;
set_addr(mtd, column, page_addr);
break ;
case NAND_CMD_ERASE1:
set_addr(mtd, column, page_addr);
break ;
case NAND_CMD_PAGEPROG:
hisi_nfc_send_cmd_pageprog(host);
break ;
case NAND_CMD_ERASE2:
hisi_nfc_send_cmd_erase(host);
break ;
case NAND_CMD_READID:
host->offset = column;
memset(host->mmio, 0 , 0 x10);
hisi_nfc_send_cmd_readid(host);
break ;
case NAND_CMD_STATUS:
flag = hinfc_read(host, HINFC504_CON);
if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST)
hinfc_write(host,
flag & ~(HINFC504_CON_ECCTYPE_MASK <<
HINFC504_CON_ECCTYPE_SHIFT), HINFC504_CON);
host->offset = 0 ;
memset(host->mmio, 0 , 0 x10);
hisi_nfc_send_cmd_status(host);
hinfc_write(host, flag, HINFC504_CON);
break ;
case NAND_CMD_RESET:
hisi_nfc_send_cmd_reset(host, host->chipselect);
break ;
default :
dev_err(host->dev, "Error: unsupported cmd(cmd=%x, col=%x, page=%x)\n" ,
command, column, page_addr);
}
if (is_cache_invalid) {
host->cache_addr_value[0 ] = ~0 ;
host->cache_addr_value[1 ] = ~0 ;
}
}
static irqreturn_t hinfc_irq_handle(int irq, void *devid)
{
struct hinfc_host *host = devid;
unsigned int flag;
flag = hinfc_read(host, HINFC504_INTS);
/* store interrupts state */
host->irq_status |= flag;
if (flag & HINFC504_INTS_DMA) {
hinfc_write(host, HINFC504_INTCLR_DMA, HINFC504_INTCLR);
complete(&host->cmd_complete);
} else if (flag & HINFC504_INTS_CE) {
hinfc_write(host, HINFC504_INTCLR_CE, HINFC504_INTCLR);
} else if (flag & HINFC504_INTS_UE) {
hinfc_write(host, HINFC504_INTCLR_UE, HINFC504_INTCLR);
}
return IRQ_HANDLED;
}
static int hisi_nand_read_page_hwecc(struct nand_chip *chip, uint8_t *buf,
int oob_required, int page)
{
struct mtd_info *mtd = nand_to_mtd(chip);
struct hinfc_host *host = nand_get_controller_data(chip);
int max_bitflips = 0 , stat = 0 , stat_max = 0 , status_ecc;
int stat_1, stat_2;
nand_read_page_op(chip, page, 0 , buf, mtd->writesize);
chip->legacy.read_buf(chip, chip->oob_poi, mtd->oobsize);
/* errors which can not be corrected by ECC */
if (host->irq_status & HINFC504_INTS_UE) {
mtd->ecc_stats.failed++;
} else if (host->irq_status & HINFC504_INTS_CE) {
/* TODO: need add other ECC modes! */
switch (chip->ecc.strength) {
case 16 :
status_ecc = hinfc_read(host, HINFC504_ECC_STATUS) >>
HINFC504_ECC_16_BIT_SHIFT & 0 x0fff;
stat_2 = status_ecc & 0 x3f;
stat_1 = status_ecc >> 6 & 0 x3f;
stat = stat_1 + stat_2;
stat_max = max_t(int , stat_1, stat_2);
}
mtd->ecc_stats.corrected += stat;
max_bitflips = max_t(int , max_bitflips, stat_max);
}
host->irq_status = 0 ;
return max_bitflips;
}
static int hisi_nand_read_oob(struct nand_chip *chip, int page)
{
struct mtd_info *mtd = nand_to_mtd(chip);
struct hinfc_host *host = nand_get_controller_data(chip);
nand_read_oob_op(chip, page, 0 , chip->oob_poi, mtd->oobsize);
if (host->irq_status & HINFC504_INTS_UE) {
host->irq_status = 0 ;
return -EBADMSG;
}
host->irq_status = 0 ;
return 0 ;
}
static int hisi_nand_write_page_hwecc(struct nand_chip *chip,
const uint8_t *buf, int oob_required,
int page)
{
struct mtd_info *mtd = nand_to_mtd(chip);
nand_prog_page_begin_op(chip, page, 0 , buf, mtd->writesize);
if (oob_required)
chip->legacy.write_buf(chip, chip->oob_poi, mtd->oobsize);
return nand_prog_page_end_op(chip);
}
static void hisi_nfc_host_init(struct hinfc_host *host)
{
struct nand_chip *chip = &host->chip;
unsigned int flag = 0 ;
host->version = hinfc_read(host, HINFC_VERSION);
host->addr_cycle = 0 ;
host->addr_value[0 ] = 0 ;
host->addr_value[1 ] = 0 ;
host->cache_addr_value[0 ] = ~0 ;
host->cache_addr_value[1 ] = ~0 ;
host->chipselect = 0 ;
/* default page size: 2K, ecc_none. need modify */
flag = HINFC504_CON_OP_MODE_NORMAL | HINFC504_CON_READY_BUSY_SEL
| ((0 x001 & HINFC504_CON_PAGESIZE_MASK)
<< HINFC504_CON_PAGEISZE_SHIFT)
| ((0 x0 & HINFC504_CON_ECCTYPE_MASK)
<< HINFC504_CON_ECCTYPE_SHIFT)
| ((chip->options & NAND_BUSWIDTH_16) ?
HINFC504_CON_BUS_WIDTH : 0 );
hinfc_write(host, flag, HINFC504_CON);
memset(host->mmio, 0 xff, HINFC504_BUFFER_BASE_ADDRESS_LEN);
hinfc_write(host, SET_HINFC504_PWIDTH(HINFC504_W_LATCH,
HINFC504_R_LATCH, HINFC504_RW_LATCH), HINFC504_PWIDTH);
/* enable DMA irq */
hinfc_write(host, HINFC504_INTEN_DMA, HINFC504_INTEN);
}
static int hisi_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
/* FIXME: add ECC bytes position */
return -ENOTSUPP;
}
static int hisi_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *oobregion)
{
if (section)
return -ERANGE;
oobregion->offset = 2 ;
oobregion->length = 6 ;
return 0 ;
}
static const struct mtd_ooblayout_ops hisi_ooblayout_ops = {
.ecc = hisi_ooblayout_ecc,
.free = hisi_ooblayout_free,
};
static int hisi_nfc_ecc_probe(struct hinfc_host *host)
{
unsigned int flag;
int size, strength, ecc_bits;
struct device *dev = host->dev;
struct nand_chip *chip = &host->chip;
struct mtd_info *mtd = nand_to_mtd(chip);
size = chip->ecc.size;
strength = chip->ecc.strength;
if (size != 1024 ) {
dev_err(dev, "error ecc size: %d\n" , size);
return -EINVAL;
}
if ((size == 1024 ) && ((strength != 8 ) && (strength != 16 ) &&
(strength != 24 ) && (strength != 40 ))) {
dev_err(dev, "ecc size and strength do not match\n" );
return -EINVAL;
}
chip->ecc.size = size;
chip->ecc.strength = strength;
chip->ecc.read_page = hisi_nand_read_page_hwecc;
chip->ecc.read_oob = hisi_nand_read_oob;
chip->ecc.write_page = hisi_nand_write_page_hwecc;
switch (chip->ecc.strength) {
case 16 :
ecc_bits = 6 ;
if (mtd->writesize == 2048 )
mtd_set_ooblayout(mtd, &hisi_ooblayout_ops);
/* TODO: add more page size support */
break ;
/* TODO: add more ecc strength support */
default :
dev_err(dev, "not support strength: %d\n" , chip->ecc.strength);
return -EINVAL;
}
flag = hinfc_read(host, HINFC504_CON);
/* add ecc type configure */
flag |= ((ecc_bits & HINFC504_CON_ECCTYPE_MASK)
<< HINFC504_CON_ECCTYPE_SHIFT);
hinfc_write(host, flag, HINFC504_CON);
/* enable ecc irq */
flag = hinfc_read(host, HINFC504_INTEN) & 0 xfff;
hinfc_write(host, flag | HINFC504_INTEN_UE | HINFC504_INTEN_CE,
HINFC504_INTEN);
return 0 ;
}
static int hisi_nfc_attach_chip(struct nand_chip *chip)
{
struct mtd_info *mtd = nand_to_mtd(chip);
struct hinfc_host *host = nand_get_controller_data(chip);
int flag;
host->buffer = dmam_alloc_coherent(host->dev,
mtd->writesize + mtd->oobsize,
&host->dma_buffer, GFP_KERNEL);
if (!host->buffer)
return -ENOMEM;
host->dma_oob = host->dma_buffer + mtd->writesize;
memset(host->buffer, 0 xff, mtd->writesize + mtd->oobsize);
flag = hinfc_read(host, HINFC504_CON);
flag &= ~(HINFC504_CON_PAGESIZE_MASK << HINFC504_CON_PAGEISZE_SHIFT);
switch (mtd->writesize) {
case 2048 :
flag |= (0 x001 << HINFC504_CON_PAGEISZE_SHIFT);
break ;
/*
* TODO : add more pagesize support ,
* default pagesize has been set in hisi_nfc_host_init
*/
default :
dev_err(host->dev, "NON-2KB page size nand flash\n" );
return -EINVAL;
}
hinfc_write(host, flag, HINFC504_CON);
if (chip->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST)
hisi_nfc_ecc_probe(host);
return 0 ;
}
static const struct nand_controller_ops hisi_nfc_controller_ops = {
.attach_chip = hisi_nfc_attach_chip,
};
static int hisi_nfc_probe(struct platform_device *pdev)
{
int ret = 0 , irq, max_chips = HINFC504_MAX_CHIP;
struct device *dev = &pdev->dev;
struct hinfc_host *host;
struct nand_chip *chip;
struct mtd_info *mtd;
struct device_node *np = dev->of_node;
host = devm_kzalloc(dev, sizeof (*host), GFP_KERNEL);
if (!host)
return -ENOMEM;
host->dev = dev;
platform_set_drvdata(pdev, host);
chip = &host->chip;
mtd = nand_to_mtd(chip);
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return -ENXIO;
host->iobase = devm_platform_ioremap_resource(pdev, 0 );
if (IS_ERR(host->iobase))
return PTR_ERR(host->iobase);
host->mmio = devm_platform_ioremap_resource(pdev, 1 );
if (IS_ERR(host->mmio))
return PTR_ERR(host->mmio);
mtd->name = "hisi_nand" ;
mtd->dev.parent = &pdev->dev;
nand_set_controller_data(chip, host);
nand_set_flash_node(chip, np);
chip->legacy.cmdfunc = hisi_nfc_cmdfunc;
chip->legacy.select_chip = hisi_nfc_select_chip;
chip->legacy.read_byte = hisi_nfc_read_byte;
chip->legacy.write_buf = hisi_nfc_write_buf;
chip->legacy.read_buf = hisi_nfc_read_buf;
chip->legacy.chip_delay = HINFC504_CHIP_DELAY;
chip->legacy.set_features = nand_get_set_features_notsupp;
chip->legacy.get_features = nand_get_set_features_notsupp;
hisi_nfc_host_init(host);
ret = devm_request_irq(dev, irq, hinfc_irq_handle, 0 x0, "nandc" , host);
if (ret) {
dev_err(dev, "failed to request IRQ\n" );
return ret;
}
chip->legacy.dummy_controller.ops = &hisi_nfc_controller_ops;
ret = nand_scan(chip, max_chips);
if (ret)
return ret;
ret = mtd_device_register(mtd, NULL, 0 );
if (ret) {
dev_err(dev, "Err MTD partition=%d\n" , ret);
nand_cleanup(chip);
return ret;
}
return 0 ;
}
static void hisi_nfc_remove(struct platform_device *pdev)
{
struct hinfc_host *host = platform_get_drvdata(pdev);
struct nand_chip *chip = &host->chip;
int ret;
ret = mtd_device_unregister(nand_to_mtd(chip));
WARN_ON(ret);
nand_cleanup(chip);
}
#ifdef CONFIG_PM_SLEEP
static int hisi_nfc_suspend(struct device *dev)
{
struct hinfc_host *host = dev_get_drvdata(dev);
unsigned long timeout = jiffies + HINFC504_NFC_PM_TIMEOUT;
while (time_before(jiffies, timeout)) {
if (((hinfc_read(host, HINFC504_STATUS) & 0 x1) == 0 x0) &&
(hinfc_read(host, HINFC504_DMA_CTRL) &
HINFC504_DMA_CTRL_DMA_START)) {
cond_resched();
return 0 ;
}
}
dev_err(host->dev, "nand controller suspend timeout.\n" );
return -EAGAIN;
}
static int hisi_nfc_resume(struct device *dev)
{
int cs;
struct hinfc_host *host = dev_get_drvdata(dev);
struct nand_chip *chip = &host->chip;
for (cs = 0 ; cs < nanddev_ntargets(&chip->base); cs++)
hisi_nfc_send_cmd_reset(host, cs);
hinfc_write(host, SET_HINFC504_PWIDTH(HINFC504_W_LATCH,
HINFC504_R_LATCH, HINFC504_RW_LATCH), HINFC504_PWIDTH);
return 0 ;
}
#endif
static SIMPLE_DEV_PM_OPS(hisi_nfc_pm_ops, hisi_nfc_suspend, hisi_nfc_resume);
static const struct of_device_id nfc_id_table[] = {
{ .compatible = "hisilicon,504-nfc" },
{}
};
MODULE_DEVICE_TABLE(of, nfc_id_table);
static struct platform_driver hisi_nfc_driver = {
.driver = {
.name = "hisi_nand" ,
.of_match_table = nfc_id_table,
.pm = &hisi_nfc_pm_ops,
},
.probe = hisi_nfc_probe,
.remove = hisi_nfc_remove,
};
module_platform_driver(hisi_nfc_driver);
MODULE_LICENSE("GPL" );
MODULE_AUTHOR("Zhou Wang" );
MODULE_AUTHOR("Zhiyong Cai" );
MODULE_DESCRIPTION("Hisilicon Nand Flash Controller Driver" );
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(vorverarbeitet am 2026-10-11)
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