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rt-thread/bsp/at91/at91sam9260/drivers/at91_nand.c

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-01-08 brightsally first version
*/
#include <rtdevice.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <at91sam926x.h>
#include "at91_nand.h"
static struct nand_chip_id *chip;
static unsigned int bufsize = 528;
static unsigned char pages_per_block = 32;
static unsigned char eccsize = 6;
static struct rt_mtd_nand_device _partition[2];
/*****************************************************************************
nand_calculate_ecc function copy from uboot
*****************************************************************************/
#define u_char unsigned char
/* Define default oob placement schemes for large and small page devices */
static struct nand_ecclayout nand_oob_16 =
{
.eccbytes = 6,
.eccpos = {0, 1, 2, 3, 6, 7},
.oobfree = {
{
.offset = 8,
. length = 8
}
}
};
static struct nand_ecclayout nand_oob_64 =
{
.eccbytes = 24,
.eccpos = {
40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55,
56, 57, 58, 59, 60, 61, 62, 63
},
.oobfree = {
{
.offset = 2,
.length = 38
}
}
};
/*
* Pre-calculated 256-way 1 byte column parity
*/
static const u_char nand_ecc_precalc_table[] =
{
0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00
};
/**
* nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256-byte block
* @mtd: MTD block structure
* @dat: raw data
* @ecc_code: buffer for ECC
*/
int nand_calculate_ecc(const u_char *dat, u_char *ecc_code)
{
uint8_t idx, reg1, reg2, reg3, tmp1, tmp2;
int i;
/* Initialize variables */
reg1 = reg2 = reg3 = 0;
/* Build up column parity */
for (i = 0; i < 256; i++)
{
/* Get CP0 - CP5 from table */
idx = nand_ecc_precalc_table[*dat++];
reg1 ^= (idx & 0x3f);
/* All bit XOR = 1 ? */
if (idx & 0x40)
{
reg3 ^= (uint8_t) i;
reg2 ^= ~((uint8_t) i);
}
}
/* Create non-inverted ECC code from line parity */
tmp1 = (reg3 & 0x80) >> 0; /* B7 -> B7 */
tmp1 |= (reg2 & 0x80) >> 1; /* B7 -> B6 */
tmp1 |= (reg3 & 0x40) >> 1; /* B6 -> B5 */
tmp1 |= (reg2 & 0x40) >> 2; /* B6 -> B4 */
tmp1 |= (reg3 & 0x20) >> 2; /* B5 -> B3 */
tmp1 |= (reg2 & 0x20) >> 3; /* B5 -> B2 */
tmp1 |= (reg3 & 0x10) >> 3; /* B4 -> B1 */
tmp1 |= (reg2 & 0x10) >> 4; /* B4 -> B0 */
tmp2 = (reg3 & 0x08) << 4; /* B3 -> B7 */
tmp2 |= (reg2 & 0x08) << 3; /* B3 -> B6 */
tmp2 |= (reg3 & 0x04) << 3; /* B2 -> B5 */
tmp2 |= (reg2 & 0x04) << 2; /* B2 -> B4 */
tmp2 |= (reg3 & 0x02) << 2; /* B1 -> B3 */
tmp2 |= (reg2 & 0x02) << 1; /* B1 -> B2 */
tmp2 |= (reg3 & 0x01) << 1; /* B0 -> B1 */
tmp2 |= (reg2 & 0x01) << 0; /* B7 -> B0 */
/* Calculate final ECC code */
#ifdef CONFIG_MTD_NAND_ECC_SMC
ecc_code[0] = ~tmp2;
ecc_code[1] = ~tmp1;
#else
ecc_code[0] = ~tmp1;
ecc_code[1] = ~tmp2;
#endif
ecc_code[2] = ((~reg1) << 2) | 0x03;
return 0;
}
/*********nand_calculate_ecc function copy from uboot end*********************/
static void at91_nand_udelay(rt_uint32_t us)
{
rt_uint32_t len;
for (; us > 0; us --)
for (len = 0; len < 10; len++);
}
static void wait_udelay()
{
if (chip->pagesize == 2048)at91_nand_udelay(2000);
else at91_nand_udelay(1);
}
void nand_enable_cs(void)
{
writel(0x00004000, 0xfffff834);
readl(0xfffff838);
//rt_kprintf("===i=0x%x\r\n",i);
wait_udelay();
}
void nand_disable_cs(void)
{
writeb(0xff, 0x40400000);
writel(0x00004000, 0xfffff830);
readl(0xfffff830);
wait_udelay();
}
void nand_write_cmd(unsigned char cmd)
{
writeb(cmd, CMD_REG);
wait_udelay();
}
void nand_write_addr(unsigned char addr)
{
writeb(addr, ADDR_REG);
wait_udelay();
}
void nand_write_data_byte(unsigned char data)
{
writeb(data, DATA_REG);
wait_udelay();
}
unsigned char nand_read_data_byte(void)
{
return readb(DATA_REG);
}
static int nand_wait_ready(void)
{
unsigned int timeout = 10000;
nand_write_cmd(CMD_STATUS);
while ((!(nand_read_data_byte() & STATUS_READY)) && timeout--);
if (!timeout)return -1;
return 0;
}
//----------------------------------------------------------------
/* read chip id */
static rt_err_t at9260_nand_read_id(struct rt_mtd_nand_device *device)
{
int manf_id, dev_id;
unsigned int chipid;
unsigned int i;
nand_enable_cs();
nand_write_cmd(CMD_READID);
nand_write_addr(CMD_READ_1);
manf_id = nand_read_data_byte();
dev_id = nand_read_data_byte();
nand_disable_cs();
chipid = (manf_id << 8) | dev_id;
for (i = 0; i < ARRAY_SIZE(nand_ids); i++)
{
if (chipid == nand_ids[i].chip_id)
break;
}
if (i == ARRAY_SIZE(nand_ids))
{
rt_kprintf("NAND: Not found Manufacturer ID: %x," \
"Chip ID: 0x%x\n", manf_id, dev_id);
return -1;
}
//find nand chip
rt_kprintf("NAND: Manufacturer ID: %x Chip ID: %x Total Block:%d\n", manf_id, dev_id, nand_ids[i].numblocks);
chip->numblocks = nand_ids[i].numblocks;
chip->pagesize = nand_ids[i].pagesize;
chip->blocksize = nand_ids[i].blocksize;
chip->oobsize = nand_ids[i].oobsize;
chip->buswidth = nand_ids[i].buswidth;
chip->numblocks = nand_ids[i].numblocks;
bufsize = chip->pagesize + chip->oobsize;
eccsize = (chip->pagesize) * 3 / 256;
if (chip->pagesize == 512)
{
pages_per_block = 32;
rt_kprintf("===small block pages===== \n");
}
else if (chip->pagesize == 2048)
{
pages_per_block = 64;
rt_kprintf("===big block pages===== \n");
}
return i;
}
int nand_read_page9260(unsigned int block, unsigned int page, unsigned char *data, rt_uint32_t data_len, unsigned char *spare, rt_uint32_t spare_len)
{
int i = 0;
unsigned int blockpage;
unsigned char buff1[bufsize];
blockpage = block * (pages_per_block) + page;
memset(buff1, 0xff, bufsize);
nand_enable_cs();
nand_write_cmd(CMD_READ_A0);
nand_write_addr(0);
if (bufsize == 2112)nand_write_addr(0);
nand_write_addr(blockpage & 0xff);
nand_write_addr((blockpage >> 8) & 0xff);
nand_write_addr((blockpage >> 16) & 0xff);
at91_nand_udelay(2000);
if (bufsize == 528)nand_write_cmd(CMD_READ_1);
else if (bufsize == 2112)nand_write_cmd(CMD_READ_2);
for (i = 0; i < chip->pagesize; i++)buff1[i] = nand_read_data_byte();
for (i = 0; i < chip->oobsize; i++)buff1[i + chip->pagesize] = nand_read_data_byte();
nand_wait_ready();
nand_disable_cs();
if (data != RT_NULL)
rt_memcpy(data, buff1, data_len);
if (spare != RT_NULL)
rt_memcpy(spare, &buff1[chip->pagesize], spare_len);
return 0x00;
}
//============================================================================
static rt_err_t at9260_nand_read_page(struct rt_mtd_nand_device *device,
rt_off_t page,
rt_uint8_t *data, rt_uint32_t data_len,
rt_uint8_t *spare, rt_uint32_t spare_len)
{
return nand_read_page9260(page / pages_per_block, page % pages_per_block, data, data_len, spare, spare_len);
}
int nand_write_page9260(unsigned int block, unsigned int page, unsigned char *data, rt_uint32_t data_len, unsigned char *spare, rt_uint32_t spare_len)
{
unsigned int blockpage;
unsigned char buff2[chip->pagesize];
unsigned char se[chip->oobsize];
unsigned char ecc_code[eccsize];
int i = 0;
blockpage = block * (pages_per_block) + page;
memset(buff2, 0xff, chip->pagesize);
memset(se, 0xff, chip->oobsize);
memset(ecc_code, 0xff, eccsize);
nand_enable_cs();
nand_write_cmd(CMD_WRITE_1);
nand_write_addr(0);
if (bufsize == 2112)nand_write_addr(0);
nand_write_addr(blockpage & 0xff);
nand_write_addr((blockpage >> 8) & 0xff);
nand_write_addr((blockpage >> 16) & 0xff);
at91_nand_udelay(2000);
for (i = 0; i < data_len; i++)buff2[i] = *(data + i);
for (i = 0; i < chip->pagesize; i++)
{
nand_write_data_byte(buff2[i]);
}
#ifndef RT_USING_DFS_UFFS
if (bufsize == 528)
{
//caclu ECC
nand_calculate_ecc(buff2, ecc_code);
nand_calculate_ecc(&buff2[256], &ecc_code[3]);
//use uboot MTD ECC layout
for (i = 0; i < 6; i++)
{
se[nand_oob_16.eccpos[i]] = ecc_code[i];
}
}
else if (bufsize == 2112)
{
//caclu ECC
for (i = 0; i < 8; i++)
{
nand_calculate_ecc(&buff2[256 * i], &(ecc_code[3 * i]));
}
//use uboot MTD ECC layout
for (i = 0; i < 24; i++)
{
se[nand_oob_64.eccpos[i]] = ecc_code[i];
}
}
#else
//UFFS do ECC
for (i = 0; i < chip->oobsize; i++)
{
se[i] = *(spare + i);
}
#endif
for (i = 0; i < chip->oobsize; i++)
{
nand_write_data_byte(se[i]);
}
nand_write_cmd(CMD_WRITE_2);
nand_wait_ready();
nand_disable_cs();
return RT_EOK;
}
//===========================================================================================
static rt_err_t at9260_nand_write_page(struct rt_mtd_nand_device *device,
rt_off_t page,
rt_uint8_t *data, rt_uint32_t data_len,
rt_uint8_t *oob, rt_uint32_t spare_len)
{
return nand_write_page9260(page / pages_per_block, page % pages_per_block, data, data_len, oob, spare_len);
}
//===========================================================================================
static rt_err_t at9260_nand_move_page(struct rt_mtd_nand_device *device, rt_off_t src_page, rt_off_t dst_page)
{
return RT_EOK;
}
//===========================================================================================
static long at9260_nand_isbad(struct rt_mtd_nand_device *nand, uint32_t blk)
{
int i = 0;
unsigned char buff2[bufsize];
unsigned int blockpage = blk * (chip->blocksize / chip->pagesize) + 0;
memset(buff2, 0xff, bufsize);
//read blk page 0
nand_enable_cs();
nand_write_cmd(CMD_READ_A0);
nand_write_addr(0);
if (bufsize == 2112)nand_write_addr(0);
nand_write_addr(blockpage & 0xff);
nand_write_addr((blockpage >> 8) & 0xff);
nand_write_addr((blockpage >> 16) & 0xff);
at91_nand_udelay(2000);
if (bufsize == 528)nand_write_cmd(CMD_READ_1);
else if (bufsize == 2112)nand_write_cmd(CMD_READ_2);
for (i = 0; i < bufsize; i++)
{
buff2[i] = nand_read_data_byte();
}
nand_disable_cs();
if (bufsize == 528)
{
if (buff2[5 + 512] != 0xff)
{
rt_kprintf("\r\n Bad Block=0x%x: Cannot read page #0 of block #%d,addr=0x%x \n\r", buff2[5 + 512], blk, blk * 512 * 32);
return buff2[5 + 512];
}
}
else if (bufsize == 2112)
{
if ((buff2[2048 + 0] != 0xff) && (buff2[2048 + 1] != 0xff))
{
rt_kprintf("\r\n Bad Block=0x%x: Cannot read page #0 of block #%d,addr=0x%x \n\r", buff2[0 + 2048], blk, blk * 2048 * 64);
return buff2[0 + 2048] << 8 | buff2[0 + 2048];
}
}
//read blk page 1
blockpage = blockpage + 1;
memset(buff2, 0xff, bufsize);
nand_enable_cs();
nand_write_cmd(CMD_READ_A0);
nand_write_addr(0);
if (bufsize == 2112)nand_write_addr(0);
nand_write_addr(blockpage & 0xff);
nand_write_addr((blockpage >> 8) & 0xff);
nand_write_addr((blockpage >> 16) & 0xff);
at91_nand_udelay(2000);
if (bufsize == 528)nand_write_cmd(CMD_READ_1);
else if (bufsize == 2112)nand_write_cmd(CMD_READ_2);
for (i = 0; i < bufsize; i++)
{
buff2[i] = nand_read_data_byte();
}
nand_disable_cs();
if (bufsize == 528)
{
if (buff2[5 + 512] != 0xff)
{
rt_kprintf("\r\n Bad Block=0x%x: Cannot read page #1 of block #%d,addr=0x%x \n\r", buff2[5 + 512], blk, blk * 512 * 32);
return buff2[5 + 512];
}
}
else if (bufsize == 2112)
{
if ((buff2[2048 + 0] != 0xff) && (buff2[2048 + 1] != 0xff))
{
rt_kprintf("\r\n Bad Block=0x%x: Cannot read page #1 of block #%d,addr=0x%x \n\r", buff2[0 + 2048], blk, blk * 2048 * 64);
return buff2[0 + 2048] << 8 | buff2[0 + 2048];
}
}
return GOODBLOCK;
}
static long at9260_nand_markbad(struct rt_mtd_nand_device *nand, uint32_t blk)
{
unsigned int i = 0;
unsigned int blockpage = blk * (chip->blocksize / chip->pagesize) + 0;
unsigned char bad_flag = 0xff;
long ret_bad;
ret_bad = at9260_nand_isbad(nand, blk);
if (bufsize == 528)bad_flag = ret_bad & 0xff;
else if (bufsize == 2112)
{
if (bad_flag == 0xff)bad_flag = (ret_bad >> 8) & 0xff;
}
if (bad_flag != 0xff)
{
nand_enable_cs();
nand_write_cmd(CMD_WRITE_1);
nand_write_addr(0);
if (bufsize == 2112)nand_write_addr(0);
nand_write_addr(blockpage & 0xff);
nand_write_addr((blockpage >> 8) & 0xff);
nand_write_addr((blockpage >> 16) & 0xff);
at91_nand_udelay(2000);
for (i = 0; i < bufsize; i++)
{
nand_write_data_byte(0x00);
}
nand_write_cmd(CMD_WRITE_2);
nand_wait_ready();
nand_disable_cs();
}
return RT_EOK;
}
//---------------------------------------------------------------------------------------------
/* erase block */
static rt_err_t at9260_nand_erase_block(struct rt_mtd_nand_device *device, rt_uint32_t block)
{
unsigned int row_address;
//Calculate address used for erase
row_address = (block) * (chip->blocksize / chip->pagesize);
nand_enable_cs();
nand_write_cmd(CMD_ERASE_1);
nand_write_addr(row_address & 0xff);
nand_write_addr((row_address >> 8) & 0xff);
nand_write_addr((row_address >> 16) & 0xff);
nand_write_cmd(CMD_ERASE_2);
at91_nand_udelay(2000);
nand_wait_ready();
nand_disable_cs();
return RT_EOK;
}
const static struct rt_mtd_nand_driver_ops _ops =
{
at9260_nand_read_id,
at9260_nand_read_page,
at9260_nand_write_page,
at9260_nand_move_page,
at9260_nand_erase_block,
#ifndef RT_USING_DFS_UFFS
at9260_nand_isbad,
at9260_nand_markbad,
#else
RT_NULL,
RT_NULL,
#endif
};
void nand_eraseall(void);
int rt_hw_mtd_nand_init(void)
{
unsigned int i, reg, index;
/* Setup Smart Media, first enable the address range of CS3 in HMATRIX user interface */
reg = readl(AT91C_BASE_CCFG + CCFG_EBICSA);
reg |= AT91C_EBI_CS3A_SM;
writel(reg, AT91C_BASE_CCFG + CCFG_EBICSA);
/* Configure SMC CS3 */
writel((AT91C_SMC_NWESETUP_(1) | AT91C_SMC_NCS_WRSETUP_(0) | AT91C_SMC_NRDSETUP_(1) | AT91C_SMC_NCS_RDSETUP_(0)), AT91C_BASE_SMC + SMC_SETUP3);
writel((AT91C_SMC_NWEPULSE_(3) | AT91C_SMC_NCS_WRPULSE_(3) | AT91C_SMC_NRDPULSE_(3) | AT91C_SMC_NCS_RDPULSE_(3)), AT91C_BASE_SMC + SMC_PULSE3);
writel((AT91C_SMC_NWECYCLE_(5) | AT91C_SMC_NRDCYCLE_(5)), AT91C_BASE_SMC + SMC_CYCLE3);
writel((AT91C_SMC_READMODE | AT91C_SMC_WRITEMODE | (0x0 << 5) | AT91C_SMC_DBW_WIDTH_BITS_8 | AT91_SMC_TDF_(2)), AT91C_BASE_SMC + SMC_CTRL3);
/* {"NANDCS", AT91C_PIN_PC(14), 1, PIO_PULLUP, PIO_OUTPUT} */
writel((0x01 << 14), 0xfffff800 + 0x0044);
writel((0x01 << 14), 0xfffff800 + 0x0060);
writel((0x01 << 14), 0xfffff800 + 0x0030);
writel((0x01 << 14), 0xfffff800 + 0x0010);
writel((0x01 << 14), 0xfffff800 + 0x0000);
/* enable PIOC clock */
writel(0x01 << 4, 0x10 + AT91C_BASE_PMC);
i = at9260_nand_read_id(RT_NULL);
index = i;
chip->pagesize = nand_ids[index].pagesize;
chip->blocksize = nand_ids[index].blocksize;
chip->oobsize = nand_ids[index].oobsize;
chip->buswidth = nand_ids[index].buswidth;
chip->numblocks = nand_ids[index].numblocks;
_partition[0].page_size = chip->pagesize;
_partition[1].page_size = chip->pagesize;
_partition[0].pages_per_block = chip->blocksize / chip->pagesize;
_partition[1].pages_per_block = chip->blocksize / chip->pagesize;
_partition[0].oob_size = _partition[1].oob_size = chip->oobsize;
_partition[0].oob_free = _partition[1].oob_free = chip->oobsize - (chip->pagesize / 256 * 3); //oob_free = oob_size - ecc_size
_partition[0].block_total = DATA_PART_ADDR / (chip->blocksize);
_partition[0].block_start = 0;
_partition[0].block_end = DATA_PART_ADDR / (chip->blocksize) - 1;
_partition[1].block_total = chip->numblocks - _partition[0].block_total;
_partition[1].block_start = _partition[0].block_end + 1;
_partition[1].block_end = chip->numblocks - 1;
_partition[0].ops = &_ops;
_partition[1].ops = &_ops;
rt_mtd_nand_register_device("nand0", &_partition[0]);
rt_mtd_nand_register_device("nand1", &_partition[1]);
return RT_EOK;
}
INIT_DEVICE_EXPORT(rt_hw_mtd_nand_init);
#if defined(RT_USING_FINSH)
#include <finsh.h>
void nand_eraseall()
{
int tmp=0;
int index=0;
if (chip->pagesize == 512)
tmp = (DATA_PART_ADDR / 0x4000); //0X4000=512*32=PAGER_SIZE*PAGES_PER_BLOCK
else if (chip->pagesize == 2048)
tmp = (DATA_PART_ADDR / 0x20000); //0X20000=2048*64
for (index=tmp; index < chip->numblocks; index ++)
{
at9260_nand_erase_block(RT_NULL, index);
}
}
FINSH_FUNCTION_EXPORT(nand_eraseall, erase all of block in the nand flash);
#endif //RT_USING_FINSH
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