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u-boot-brain/drivers/mtd/nand/atmel_nand.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2007-2008
* Stelian Pop <stelian@popies.net>
* Lead Tech Design <www.leadtechdesign.com>
*
* (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
*
* Add Programmable Multibit ECC support for various AT91 SoC
* (C) Copyright 2012 ATMEL, Hong Xu
*/
#include <common.h>
#include <asm/gpio.h>
#include <asm/arch/gpio.h>
#include <malloc.h>
#include <nand.h>
#include <watchdog.h>
#include <linux/mtd/nand_ecc.h>
#ifdef CONFIG_ATMEL_NAND_HWECC
/* Register access macros */
#define ecc_readl(add, reg) \
readl(add + ATMEL_ECC_##reg)
#define ecc_writel(add, reg, value) \
writel((value), add + ATMEL_ECC_##reg)
#include "atmel_nand_ecc.h" /* Hardware ECC registers */
#ifdef CONFIG_ATMEL_NAND_HW_PMECC
#ifdef CONFIG_SPL_BUILD
#undef CONFIG_SYS_NAND_ONFI_DETECTION
#endif
struct atmel_nand_host {
struct pmecc_regs __iomem *pmecc;
struct pmecc_errloc_regs __iomem *pmerrloc;
void __iomem *pmecc_rom_base;
u8 pmecc_corr_cap;
u16 pmecc_sector_size;
u32 pmecc_index_table_offset;
u32 pmecc_version;
int pmecc_bytes_per_sector;
int pmecc_sector_number;
int pmecc_degree; /* Degree of remainders */
int pmecc_cw_len; /* Length of codeword */
/* lookup table for alpha_to and index_of */
void __iomem *pmecc_alpha_to;
void __iomem *pmecc_index_of;
/* data for pmecc computation */
int16_t *pmecc_smu;
int16_t *pmecc_partial_syn;
int16_t *pmecc_si;
int16_t *pmecc_lmu; /* polynomal order */
int *pmecc_mu;
int *pmecc_dmu;
int *pmecc_delta;
};
static struct atmel_nand_host pmecc_host;
static struct nand_ecclayout atmel_pmecc_oobinfo;
/*
* Return number of ecc bytes per sector according to sector size and
* correction capability
*
* Following table shows what at91 PMECC supported:
* Correction Capability Sector_512_bytes Sector_1024_bytes
* ===================== ================ =================
* 2-bits 4-bytes 4-bytes
* 4-bits 7-bytes 7-bytes
* 8-bits 13-bytes 14-bytes
* 12-bits 20-bytes 21-bytes
* 24-bits 39-bytes 42-bytes
* 32-bits 52-bytes 56-bytes
*/
static int pmecc_get_ecc_bytes(int cap, int sector_size)
{
int m = 12 + sector_size / 512;
return (m * cap + 7) / 8;
}
static void pmecc_config_ecc_layout(struct nand_ecclayout *layout,
int oobsize, int ecc_len)
{
int i;
layout->eccbytes = ecc_len;
/* ECC will occupy the last ecc_len bytes continuously */
for (i = 0; i < ecc_len; i++)
layout->eccpos[i] = oobsize - ecc_len + i;
layout->oobfree[0].offset = 2;
layout->oobfree[0].length =
oobsize - ecc_len - layout->oobfree[0].offset;
}
static void __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host)
{
int table_size;
table_size = host->pmecc_sector_size == 512 ?
PMECC_INDEX_TABLE_SIZE_512 : PMECC_INDEX_TABLE_SIZE_1024;
/* the ALPHA lookup table is right behind the INDEX lookup table. */
return host->pmecc_rom_base + host->pmecc_index_table_offset +
table_size * sizeof(int16_t);
}
static void pmecc_data_free(struct atmel_nand_host *host)
{
free(host->pmecc_partial_syn);
free(host->pmecc_si);
free(host->pmecc_lmu);
free(host->pmecc_smu);
free(host->pmecc_mu);
free(host->pmecc_dmu);
free(host->pmecc_delta);
}
static int pmecc_data_alloc(struct atmel_nand_host *host)
{
const int cap = host->pmecc_corr_cap;
int size;
size = (2 * cap + 1) * sizeof(int16_t);
host->pmecc_partial_syn = malloc(size);
host->pmecc_si = malloc(size);
host->pmecc_lmu = malloc((cap + 1) * sizeof(int16_t));
host->pmecc_smu = malloc((cap + 2) * size);
size = (cap + 1) * sizeof(int);
host->pmecc_mu = malloc(size);
host->pmecc_dmu = malloc(size);
host->pmecc_delta = malloc(size);
if (host->pmecc_partial_syn &&
host->pmecc_si &&
host->pmecc_lmu &&
host->pmecc_smu &&
host->pmecc_mu &&
host->pmecc_dmu &&
host->pmecc_delta)
return 0;
/* error happened */
pmecc_data_free(host);
return -ENOMEM;
}
static void pmecc_gen_syndrome(struct mtd_info *mtd, int sector)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
int i;
uint32_t value;
/* Fill odd syndromes */
for (i = 0; i < host->pmecc_corr_cap; i++) {
value = pmecc_readl(host->pmecc, rem_port[sector].rem[i / 2]);
if (i & 1)
value >>= 16;
value &= 0xffff;
host->pmecc_partial_syn[(2 * i) + 1] = (int16_t)value;
}
}
static void pmecc_substitute(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
int16_t __iomem *alpha_to = host->pmecc_alpha_to;
int16_t __iomem *index_of = host->pmecc_index_of;
int16_t *partial_syn = host->pmecc_partial_syn;
const int cap = host->pmecc_corr_cap;
int16_t *si;
int i, j;
/* si[] is a table that holds the current syndrome value,
* an element of that table belongs to the field
*/
si = host->pmecc_si;
memset(&si[1], 0, sizeof(int16_t) * (2 * cap - 1));
/* Computation 2t syndromes based on S(x) */
/* Odd syndromes */
for (i = 1; i < 2 * cap; i += 2) {
for (j = 0; j < host->pmecc_degree; j++) {
if (partial_syn[i] & (0x1 << j))
si[i] = readw(alpha_to + i * j) ^ si[i];
}
}
/* Even syndrome = (Odd syndrome) ** 2 */
for (i = 2, j = 1; j <= cap; i = ++j << 1) {
if (si[j] == 0) {
si[i] = 0;
} else {
int16_t tmp;
tmp = readw(index_of + si[j]);
tmp = (tmp * 2) % host->pmecc_cw_len;
si[i] = readw(alpha_to + tmp);
}
}
}
/*
* This function defines a Berlekamp iterative procedure for
* finding the value of the error location polynomial.
* The input is si[], initialize by pmecc_substitute().
* The output is smu[][].
*
* This function is written according to chip datasheet Chapter:
* Find the Error Location Polynomial Sigma(x) of Section:
* Programmable Multibit ECC Control (PMECC).
*/
static void pmecc_get_sigma(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
int16_t *lmu = host->pmecc_lmu;
int16_t *si = host->pmecc_si;
int *mu = host->pmecc_mu;
int *dmu = host->pmecc_dmu; /* Discrepancy */
int *delta = host->pmecc_delta; /* Delta order */
int cw_len = host->pmecc_cw_len;
const int16_t cap = host->pmecc_corr_cap;
const int num = 2 * cap + 1;
int16_t __iomem *index_of = host->pmecc_index_of;
int16_t __iomem *alpha_to = host->pmecc_alpha_to;
int i, j, k;
uint32_t dmu_0_count, tmp;
int16_t *smu = host->pmecc_smu;
/* index of largest delta */
int ro;
int largest;
int diff;
/* Init the Sigma(x) */
memset(smu, 0, sizeof(int16_t) * ARRAY_SIZE(smu));
dmu_0_count = 0;
/* First Row */
/* Mu */
mu[0] = -1;
smu[0] = 1;
/* discrepancy set to 1 */
dmu[0] = 1;
/* polynom order set to 0 */
lmu[0] = 0;
/* delta[0] = (mu[0] * 2 - lmu[0]) >> 1; */
delta[0] = -1;
/* Second Row */
/* Mu */
mu[1] = 0;
/* Sigma(x) set to 1 */
smu[num] = 1;
/* discrepancy set to S1 */
dmu[1] = si[1];
/* polynom order set to 0 */
lmu[1] = 0;
/* delta[1] = (mu[1] * 2 - lmu[1]) >> 1; */
delta[1] = 0;
for (i = 1; i <= cap; i++) {
mu[i + 1] = i << 1;
/* Begin Computing Sigma (Mu+1) and L(mu) */
/* check if discrepancy is set to 0 */
if (dmu[i] == 0) {
dmu_0_count++;
tmp = ((cap - (lmu[i] >> 1) - 1) / 2);
if ((cap - (lmu[i] >> 1) - 1) & 0x1)
tmp += 2;
else
tmp += 1;
if (dmu_0_count == tmp) {
for (j = 0; j <= (lmu[i] >> 1) + 1; j++)
smu[(cap + 1) * num + j] =
smu[i * num + j];
lmu[cap + 1] = lmu[i];
return;
}
/* copy polynom */
for (j = 0; j <= lmu[i] >> 1; j++)
smu[(i + 1) * num + j] = smu[i * num + j];
/* copy previous polynom order to the next */
lmu[i + 1] = lmu[i];
} else {
ro = 0;
largest = -1;
/* find largest delta with dmu != 0 */
for (j = 0; j < i; j++) {
if ((dmu[j]) && (delta[j] > largest)) {
largest = delta[j];
ro = j;
}
}
/* compute difference */
diff = (mu[i] - mu[ro]);
/* Compute degree of the new smu polynomial */
if ((lmu[i] >> 1) > ((lmu[ro] >> 1) + diff))
lmu[i + 1] = lmu[i];
else
lmu[i + 1] = ((lmu[ro] >> 1) + diff) * 2;
/* Init smu[i+1] with 0 */
for (k = 0; k < num; k++)
smu[(i + 1) * num + k] = 0;
/* Compute smu[i+1] */
for (k = 0; k <= lmu[ro] >> 1; k++) {
int16_t a, b, c;
if (!(smu[ro * num + k] && dmu[i]))
continue;
a = readw(index_of + dmu[i]);
b = readw(index_of + dmu[ro]);
c = readw(index_of + smu[ro * num + k]);
tmp = a + (cw_len - b) + c;
a = readw(alpha_to + tmp % cw_len);
smu[(i + 1) * num + (k + diff)] = a;
}
for (k = 0; k <= lmu[i] >> 1; k++)
smu[(i + 1) * num + k] ^= smu[i * num + k];
}
/* End Computing Sigma (Mu+1) and L(mu) */
/* In either case compute delta */
delta[i + 1] = (mu[i + 1] * 2 - lmu[i + 1]) >> 1;
/* Do not compute discrepancy for the last iteration */
if (i >= cap)
continue;
for (k = 0; k <= (lmu[i + 1] >> 1); k++) {
tmp = 2 * (i - 1);
if (k == 0) {
dmu[i + 1] = si[tmp + 3];
} else if (smu[(i + 1) * num + k] && si[tmp + 3 - k]) {
int16_t a, b, c;
a = readw(index_of +
smu[(i + 1) * num + k]);
b = si[2 * (i - 1) + 3 - k];
c = readw(index_of + b);
tmp = a + c;
tmp %= cw_len;
dmu[i + 1] = readw(alpha_to + tmp) ^
dmu[i + 1];
}
}
}
}
static int pmecc_err_location(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
const int cap = host->pmecc_corr_cap;
const int num = 2 * cap + 1;
int sector_size = host->pmecc_sector_size;
int err_nbr = 0; /* number of error */
int roots_nbr; /* number of roots */
int i;
uint32_t val;
int16_t *smu = host->pmecc_smu;
int timeout = PMECC_MAX_TIMEOUT_US;
pmecc_writel(host->pmerrloc, eldis, PMERRLOC_DISABLE);
for (i = 0; i <= host->pmecc_lmu[cap + 1] >> 1; i++) {
pmecc_writel(host->pmerrloc, sigma[i],
smu[(cap + 1) * num + i]);
err_nbr++;
}
val = PMERRLOC_ELCFG_NUM_ERRORS(err_nbr - 1);
if (sector_size == 1024)
val |= PMERRLOC_ELCFG_SECTOR_1024;
pmecc_writel(host->pmerrloc, elcfg, val);
pmecc_writel(host->pmerrloc, elen,
sector_size * 8 + host->pmecc_degree * cap);
while (--timeout) {
if (pmecc_readl(host->pmerrloc, elisr) & PMERRLOC_CALC_DONE)
break;
WATCHDOG_RESET();
udelay(1);
}
if (!timeout) {
dev_err(host->dev, "atmel_nand : Timeout to calculate PMECC error location\n");
return -1;
}
roots_nbr = (pmecc_readl(host->pmerrloc, elisr) & PMERRLOC_ERR_NUM_MASK)
>> 8;
/* Number of roots == degree of smu hence <= cap */
if (roots_nbr == host->pmecc_lmu[cap + 1] >> 1)
return err_nbr - 1;
/* Number of roots does not match the degree of smu
* unable to correct error */
return -1;
}
static void pmecc_correct_data(struct mtd_info *mtd, uint8_t *buf, uint8_t *ecc,
int sector_num, int extra_bytes, int err_nbr)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
int i = 0;
int byte_pos, bit_pos, sector_size, pos;
uint32_t tmp;
uint8_t err_byte;
sector_size = host->pmecc_sector_size;
while (err_nbr) {
tmp = pmecc_readl(host->pmerrloc, el[i]) - 1;
byte_pos = tmp / 8;
bit_pos = tmp % 8;
if (byte_pos >= (sector_size + extra_bytes))
BUG(); /* should never happen */
if (byte_pos < sector_size) {
err_byte = *(buf + byte_pos);
*(buf + byte_pos) ^= (1 << bit_pos);
pos = sector_num * host->pmecc_sector_size + byte_pos;
dev_dbg(host->dev, "Bit flip in data area, byte_pos: %d, bit_pos: %d, 0x%02x -> 0x%02x\n",
pos, bit_pos, err_byte, *(buf + byte_pos));
} else {
/* Bit flip in OOB area */
tmp = sector_num * host->pmecc_bytes_per_sector
+ (byte_pos - sector_size);
err_byte = ecc[tmp];
ecc[tmp] ^= (1 << bit_pos);
pos = tmp + nand_chip->ecc.layout->eccpos[0];
dev_dbg(host->dev, "Bit flip in OOB, oob_byte_pos: %d, bit_pos: %d, 0x%02x -> 0x%02x\n",
pos, bit_pos, err_byte, ecc[tmp]);
}
i++;
err_nbr--;
}
return;
}
static int pmecc_correction(struct mtd_info *mtd, u32 pmecc_stat, uint8_t *buf,
u8 *ecc)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
int i, err_nbr, eccbytes;
uint8_t *buf_pos;
/* SAMA5D4 PMECC IP can correct errors for all 0xff page */
if (host->pmecc_version >= PMECC_VERSION_SAMA5D4)
goto normal_check;
eccbytes = nand_chip->ecc.bytes;
for (i = 0; i < eccbytes; i++)
if (ecc[i] != 0xff)
goto normal_check;
/* Erased page, return OK */
return 0;
normal_check:
for (i = 0; i < host->pmecc_sector_number; i++) {
err_nbr = 0;
if (pmecc_stat & 0x1) {
buf_pos = buf + i * host->pmecc_sector_size;
pmecc_gen_syndrome(mtd, i);
pmecc_substitute(mtd);
pmecc_get_sigma(mtd);
err_nbr = pmecc_err_location(mtd);
if (err_nbr == -1) {
dev_err(host->dev, "PMECC: Too many errors\n");
mtd->ecc_stats.failed++;
return -EBADMSG;
} else {
pmecc_correct_data(mtd, buf_pos, ecc, i,
host->pmecc_bytes_per_sector, err_nbr);
mtd->ecc_stats.corrected += err_nbr;
}
}
pmecc_stat >>= 1;
}
return 0;
}
static int atmel_nand_pmecc_read_page(struct mtd_info *mtd,
struct nand_chip *chip, uint8_t *buf, int oob_required, int page)
{
struct atmel_nand_host *host = nand_get_controller_data(chip);
int eccsize = chip->ecc.size;
uint8_t *oob = chip->oob_poi;
uint32_t *eccpos = chip->ecc.layout->eccpos;
uint32_t stat;
int timeout = PMECC_MAX_TIMEOUT_US;
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_RST);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DISABLE);
pmecc_writel(host->pmecc, cfg, ((pmecc_readl(host->pmecc, cfg))
& ~PMECC_CFG_WRITE_OP) | PMECC_CFG_AUTO_ENABLE);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_ENABLE);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DATA);
chip->read_buf(mtd, buf, eccsize);
chip->read_buf(mtd, oob, mtd->oobsize);
while (--timeout) {
if (!(pmecc_readl(host->pmecc, sr) & PMECC_SR_BUSY))
break;
WATCHDOG_RESET();
udelay(1);
}
if (!timeout) {
dev_err(host->dev, "atmel_nand : Timeout to read PMECC page\n");
return -1;
}
stat = pmecc_readl(host->pmecc, isr);
if (stat != 0)
if (pmecc_correction(mtd, stat, buf, &oob[eccpos[0]]) != 0)
return -EBADMSG;
return 0;
}
static int atmel_nand_pmecc_write_page(struct mtd_info *mtd,
struct nand_chip *chip, const uint8_t *buf,
int oob_required, int page)
{
struct atmel_nand_host *host = nand_get_controller_data(chip);
uint32_t *eccpos = chip->ecc.layout->eccpos;
int i, j;
int timeout = PMECC_MAX_TIMEOUT_US;
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_RST);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DISABLE);
pmecc_writel(host->pmecc, cfg, (pmecc_readl(host->pmecc, cfg) |
PMECC_CFG_WRITE_OP) & ~PMECC_CFG_AUTO_ENABLE);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_ENABLE);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DATA);
chip->write_buf(mtd, (u8 *)buf, mtd->writesize);
while (--timeout) {
if (!(pmecc_readl(host->pmecc, sr) & PMECC_SR_BUSY))
break;
WATCHDOG_RESET();
udelay(1);
}
if (!timeout) {
dev_err(host->dev, "atmel_nand : Timeout to read PMECC status, fail to write PMECC in oob\n");
goto out;
}
for (i = 0; i < host->pmecc_sector_number; i++) {
for (j = 0; j < host->pmecc_bytes_per_sector; j++) {
int pos;
pos = i * host->pmecc_bytes_per_sector + j;
chip->oob_poi[eccpos[pos]] =
pmecc_readb(host->pmecc, ecc_port[i].ecc[j]);
}
}
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
out:
return 0;
}
static void atmel_pmecc_core_init(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
struct atmel_nand_host *host = nand_get_controller_data(nand_chip);
uint32_t val = 0;
struct nand_ecclayout *ecc_layout;
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_RST);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_DISABLE);
switch (host->pmecc_corr_cap) {
case 2:
val = PMECC_CFG_BCH_ERR2;
break;
case 4:
val = PMECC_CFG_BCH_ERR4;
break;
case 8:
val = PMECC_CFG_BCH_ERR8;
break;
case 12:
val = PMECC_CFG_BCH_ERR12;
break;
case 24:
val = PMECC_CFG_BCH_ERR24;
break;
case 32:
val = PMECC_CFG_BCH_ERR32;
break;
}
if (host->pmecc_sector_size == 512)
val |= PMECC_CFG_SECTOR512;
else if (host->pmecc_sector_size == 1024)
val |= PMECC_CFG_SECTOR1024;
switch (host->pmecc_sector_number) {
case 1:
val |= PMECC_CFG_PAGE_1SECTOR;
break;
case 2:
val |= PMECC_CFG_PAGE_2SECTORS;
break;
case 4:
val |= PMECC_CFG_PAGE_4SECTORS;
break;
case 8:
val |= PMECC_CFG_PAGE_8SECTORS;
break;
}
val |= (PMECC_CFG_READ_OP | PMECC_CFG_SPARE_DISABLE
| PMECC_CFG_AUTO_DISABLE);
pmecc_writel(host->pmecc, cfg, val);
ecc_layout = nand_chip->ecc.layout;
pmecc_writel(host->pmecc, sarea, mtd->oobsize - 1);
pmecc_writel(host->pmecc, saddr, ecc_layout->eccpos[0]);
pmecc_writel(host->pmecc, eaddr,
ecc_layout->eccpos[ecc_layout->eccbytes - 1]);
/* See datasheet about PMECC Clock Control Register */
pmecc_writel(host->pmecc, clk, PMECC_CLK_133MHZ);
pmecc_writel(host->pmecc, idr, 0xff);
pmecc_writel(host->pmecc, ctrl, PMECC_CTRL_ENABLE);
}
#ifdef CONFIG_SYS_NAND_ONFI_DETECTION
/*
* pmecc_choose_ecc - Get ecc requirement from ONFI parameters. If
* pmecc_corr_cap or pmecc_sector_size is 0, then set it as
* ONFI ECC parameters.
* @host: point to an atmel_nand_host structure.
* if host->pmecc_corr_cap is 0 then set it as the ONFI ecc_bits.
* if host->pmecc_sector_size is 0 then set it as the ONFI sector_size.
* @chip: point to an nand_chip structure.
* @cap: store the ONFI ECC correct bits capbility
* @sector_size: in how many bytes that ONFI require to correct @ecc_bits
*
* Return 0 if success. otherwise return the error code.
*/
static int pmecc_choose_ecc(struct atmel_nand_host *host,
struct nand_chip *chip,
int *cap, int *sector_size)
{
/* Get ECC requirement from ONFI parameters */
*cap = *sector_size = 0;
if (chip->onfi_version) {
*cap = chip->ecc_strength_ds;
*sector_size = chip->ecc_step_ds;
pr_debug("ONFI params, minimum required ECC: %d bits in %d bytes\n",
*cap, *sector_size);
}
if (*cap == 0 && *sector_size == 0) {
/* Non-ONFI compliant */
dev_info(host->dev, "NAND chip is not ONFI compliant, assume ecc_bits is 2 in 512 bytes\n");
*cap = 2;
*sector_size = 512;
}
/* If head file doesn't specify then use the one in ONFI parameters */
if (host->pmecc_corr_cap == 0) {
/* use the most fitable ecc bits (the near bigger one ) */
if (*cap <= 2)
host->pmecc_corr_cap = 2;
else if (*cap <= 4)
host->pmecc_corr_cap = 4;
else if (*cap <= 8)
host->pmecc_corr_cap = 8;
else if (*cap <= 12)
host->pmecc_corr_cap = 12;
else if (*cap <= 24)
host->pmecc_corr_cap = 24;
else
#ifdef CONFIG_SAMA5D2
host->pmecc_corr_cap = 32;
#else
host->pmecc_corr_cap = 24;
#endif
}
if (host->pmecc_sector_size == 0) {
/* use the most fitable sector size (the near smaller one ) */
if (*sector_size >= 1024)
host->pmecc_sector_size = 1024;
else if (*sector_size >= 512)
host->pmecc_sector_size = 512;
else
return -EINVAL;
}
return 0;
}
#endif
#if defined(NO_GALOIS_TABLE_IN_ROM)
static uint16_t *pmecc_galois_table;
static inline int deg(unsigned int poly)
{
/* polynomial degree is the most-significant bit index */
return fls(poly) - 1;
}
static int build_gf_tables(int mm, unsigned int poly,
int16_t *index_of, int16_t *alpha_to)
{
unsigned int i, x = 1;
const unsigned int k = 1 << deg(poly);
unsigned int nn = (1 << mm) - 1;
/* primitive polynomial must be of degree m */
if (k != (1u << mm))
return -EINVAL;
for (i = 0; i < nn; i++) {
alpha_to[i] = x;
index_of[x] = i;
if (i && (x == 1))
/* polynomial is not primitive (a^i=1 with 0<i<2^m-1) */
return -EINVAL;
x <<= 1;
if (x & k)
x ^= poly;
}
alpha_to[nn] = 1;
index_of[0] = 0;
return 0;
}
static uint16_t *create_lookup_table(int sector_size)
{
int degree = (sector_size == 512) ?
PMECC_GF_DIMENSION_13 :
PMECC_GF_DIMENSION_14;
unsigned int poly = (sector_size == 512) ?
PMECC_GF_13_PRIMITIVE_POLY :
PMECC_GF_14_PRIMITIVE_POLY;
int table_size = (sector_size == 512) ?
PMECC_INDEX_TABLE_SIZE_512 :
PMECC_INDEX_TABLE_SIZE_1024;
int16_t *addr = kzalloc(2 * table_size * sizeof(uint16_t), GFP_KERNEL);
if (addr && build_gf_tables(degree, poly, addr, addr + table_size))
return NULL;
return (uint16_t *)addr;
}
#endif
static int atmel_pmecc_nand_init_params(struct nand_chip *nand,
struct mtd_info *mtd)
{
struct atmel_nand_host *host;
int cap, sector_size;
host = &pmecc_host;
nand_set_controller_data(nand, host);
nand->ecc.mode = NAND_ECC_HW;
nand->ecc.calculate = NULL;
nand->ecc.correct = NULL;
nand->ecc.hwctl = NULL;
#ifdef CONFIG_SYS_NAND_ONFI_DETECTION
host->pmecc_corr_cap = host->pmecc_sector_size = 0;
#ifdef CONFIG_PMECC_CAP
host->pmecc_corr_cap = CONFIG_PMECC_CAP;
#endif
#ifdef CONFIG_PMECC_SECTOR_SIZE
host->pmecc_sector_size = CONFIG_PMECC_SECTOR_SIZE;
#endif
/* Get ECC requirement of ONFI parameters. And if CONFIG_PMECC_CAP or
* CONFIG_PMECC_SECTOR_SIZE not defined, then use ecc_bits, sector_size
* from ONFI.
*/
if (pmecc_choose_ecc(host, nand, &cap, &sector_size)) {
dev_err(host->dev, "Required ECC %d bits in %d bytes not supported!\n",
cap, sector_size);
return -EINVAL;
}
if (cap > host->pmecc_corr_cap)
dev_info(host->dev, "WARNING: Using different ecc correct bits(%d bit) from Nand ONFI ECC reqirement (%d bit).\n",
host->pmecc_corr_cap, cap);
if (sector_size < host->pmecc_sector_size)
dev_info(host->dev, "WARNING: Using different ecc correct sector size (%d bytes) from Nand ONFI ECC reqirement (%d bytes).\n",
host->pmecc_sector_size, sector_size);
#else /* CONFIG_SYS_NAND_ONFI_DETECTION */
host->pmecc_corr_cap = CONFIG_PMECC_CAP;
host->pmecc_sector_size = CONFIG_PMECC_SECTOR_SIZE;
#endif
cap = host->pmecc_corr_cap;
sector_size = host->pmecc_sector_size;
/* TODO: need check whether cap & sector_size is validate */
#if defined(NO_GALOIS_TABLE_IN_ROM)
/*
* As pmecc_rom_base is the begin of the gallois field table, So the
* index offset just set as 0.
*/
host->pmecc_index_table_offset = 0;
#else
if (host->pmecc_sector_size == 512)
host->pmecc_index_table_offset = ATMEL_PMECC_INDEX_OFFSET_512;
else
host->pmecc_index_table_offset = ATMEL_PMECC_INDEX_OFFSET_1024;
#endif
pr_debug("Initialize PMECC params, cap: %d, sector: %d\n",
cap, sector_size);
host->pmecc = (struct pmecc_regs __iomem *) ATMEL_BASE_PMECC;
host->pmerrloc = (struct pmecc_errloc_regs __iomem *)
ATMEL_BASE_PMERRLOC;
#if defined(NO_GALOIS_TABLE_IN_ROM)
pmecc_galois_table = create_lookup_table(host->pmecc_sector_size);
if (!pmecc_galois_table) {
dev_err(host->dev, "out of memory\n");
return -ENOMEM;
}
host->pmecc_rom_base = (void __iomem *)pmecc_galois_table;
#else
host->pmecc_rom_base = (void __iomem *) ATMEL_BASE_ROM;
#endif
/* ECC is calculated for the whole page (1 step) */
nand->ecc.size = mtd->writesize;
/* set ECC page size and oob layout */
switch (mtd->writesize) {
case 2048:
case 4096:
case 8192:
host->pmecc_degree = (sector_size == 512) ?
PMECC_GF_DIMENSION_13 : PMECC_GF_DIMENSION_14;
host->pmecc_cw_len = (1 << host->pmecc_degree) - 1;
host->pmecc_sector_number = mtd->writesize / sector_size;
host->pmecc_bytes_per_sector = pmecc_get_ecc_bytes(
cap, sector_size);
host->pmecc_alpha_to = pmecc_get_alpha_to(host);
host->pmecc_index_of = host->pmecc_rom_base +
host->pmecc_index_table_offset;
nand->ecc.steps = 1;
nand->ecc.bytes = host->pmecc_bytes_per_sector *
host->pmecc_sector_number;
if (nand->ecc.bytes > MTD_MAX_ECCPOS_ENTRIES_LARGE) {
dev_err(host->dev, "too large eccpos entries. max support ecc.bytes is %d\n",
MTD_MAX_ECCPOS_ENTRIES_LARGE);
return -EINVAL;
}
if (nand->ecc.bytes > mtd->oobsize - PMECC_OOB_RESERVED_BYTES) {
dev_err(host->dev, "No room for ECC bytes\n");
return -EINVAL;
}
pmecc_config_ecc_layout(&atmel_pmecc_oobinfo,
mtd->oobsize,
nand->ecc.bytes);
nand->ecc.layout = &atmel_pmecc_oobinfo;
break;
case 512:
case 1024:
/* TODO */
dev_err(host->dev, "Unsupported page size for PMECC, use Software ECC\n");
default:
/* page size not handled by HW ECC */
/* switching back to soft ECC */
nand->ecc.mode = NAND_ECC_SOFT;
nand->ecc.read_page = NULL;
nand->ecc.postpad = 0;
nand->ecc.prepad = 0;
nand->ecc.bytes = 0;
return 0;
}
/* Allocate data for PMECC computation */
if (pmecc_data_alloc(host)) {
dev_err(host->dev, "Cannot allocate memory for PMECC computation!\n");
return -ENOMEM;
}
nand->options |= NAND_NO_SUBPAGE_WRITE;
nand->ecc.read_page = atmel_nand_pmecc_read_page;
nand->ecc.write_page = atmel_nand_pmecc_write_page;
nand->ecc.strength = cap;
/* Check the PMECC ip version */
host->pmecc_version = pmecc_readl(host->pmerrloc, version);
dev_dbg(host->dev, "PMECC IP version is: %x\n", host->pmecc_version);
atmel_pmecc_core_init(mtd);
return 0;
}
#else
/* oob layout for large page size
* bad block info is on bytes 0 and 1
* the bytes have to be consecutives to avoid
* several NAND_CMD_RNDOUT during read
*/
static struct nand_ecclayout atmel_oobinfo_large = {
.eccbytes = 4,
.eccpos = {60, 61, 62, 63},
.oobfree = {
{2, 58}
},
};
/* oob layout for small page size
* bad block info is on bytes 4 and 5
* the bytes have to be consecutives to avoid
* several NAND_CMD_RNDOUT during read
*/
static struct nand_ecclayout atmel_oobinfo_small = {
.eccbytes = 4,
.eccpos = {0, 1, 2, 3},
.oobfree = {
{6, 10}
},
};
/*
* Calculate HW ECC
*
* function called after a write
*
* mtd: MTD block structure
* dat: raw data (unused)
* ecc_code: buffer for ECC
*/
static int atmel_nand_calculate(struct mtd_info *mtd,
const u_char *dat, unsigned char *ecc_code)
{
unsigned int ecc_value;
/* get the first 2 ECC bytes */
ecc_value = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, PR);
ecc_code[0] = ecc_value & 0xFF;
ecc_code[1] = (ecc_value >> 8) & 0xFF;
/* get the last 2 ECC bytes */
ecc_value = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, NPR) & ATMEL_ECC_NPARITY;
ecc_code[2] = ecc_value & 0xFF;
ecc_code[3] = (ecc_value >> 8) & 0xFF;
return 0;
}
/*
* HW ECC read page function
*
* mtd: mtd info structure
* chip: nand chip info structure
* buf: buffer to store read data
* oob_required: caller expects OOB data read to chip->oob_poi
*/
static int atmel_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *buf, int oob_required, int page)
{
int eccsize = chip->ecc.size;
int eccbytes = chip->ecc.bytes;
uint32_t *eccpos = chip->ecc.layout->eccpos;
uint8_t *p = buf;
uint8_t *oob = chip->oob_poi;
uint8_t *ecc_pos;
int stat;
/* read the page */
chip->read_buf(mtd, p, eccsize);
/* move to ECC position if needed */
if (eccpos[0] != 0) {
/* This only works on large pages
* because the ECC controller waits for
* NAND_CMD_RNDOUTSTART after the
* NAND_CMD_RNDOUT.
* anyway, for small pages, the eccpos[0] == 0
*/
chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
mtd->writesize + eccpos[0], -1);
}
/* the ECC controller needs to read the ECC just after the data */
ecc_pos = oob + eccpos[0];
chip->read_buf(mtd, ecc_pos, eccbytes);
/* check if there's an error */
stat = chip->ecc.correct(mtd, p, oob, NULL);
if (stat < 0)
mtd->ecc_stats.failed++;
else
mtd->ecc_stats.corrected += stat;
/* get back to oob start (end of page) */
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1);
/* read the oob */
chip->read_buf(mtd, oob, mtd->oobsize);
return 0;
}
/*
* HW ECC Correction
*
* function called after a read
*
* mtd: MTD block structure
* dat: raw data read from the chip
* read_ecc: ECC from the chip (unused)
* isnull: unused
*
* Detect and correct a 1 bit error for a page
*/
static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat,
u_char *read_ecc, u_char *isnull)
{
struct nand_chip *nand_chip = mtd_to_nand(mtd);
unsigned int ecc_status;
unsigned int ecc_word, ecc_bit;
/* get the status from the Status Register */
ecc_status = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, SR);
/* if there's no error */
if (likely(!(ecc_status & ATMEL_ECC_RECERR)))
return 0;
/* get error bit offset (4 bits) */
ecc_bit = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, PR) & ATMEL_ECC_BITADDR;
/* get word address (12 bits) */
ecc_word = ecc_readl(CONFIG_SYS_NAND_ECC_BASE, PR) & ATMEL_ECC_WORDADDR;
ecc_word >>= 4;
/* if there are multiple errors */
if (ecc_status & ATMEL_ECC_MULERR) {
/* check if it is a freshly erased block
* (filled with 0xff) */
if ((ecc_bit == ATMEL_ECC_BITADDR)
&& (ecc_word == (ATMEL_ECC_WORDADDR >> 4))) {
/* the block has just been erased, return OK */
return 0;
}
/* it doesn't seems to be a freshly
* erased block.
* We can't correct so many errors */
dev_warn(host->dev, "atmel_nand : multiple errors detected."
" Unable to correct.\n");
return -EBADMSG;
}
/* if there's a single bit error : we can correct it */
if (ecc_status & ATMEL_ECC_ECCERR) {
/* there's nothing much to do here.
* the bit error is on the ECC itself.
*/
dev_warn(host->dev, "atmel_nand : one bit error on ECC code."
" Nothing to correct\n");
return 0;
}
dev_warn(host->dev, "atmel_nand : one bit error on data."
" (word offset in the page :"
" 0x%x bit offset : 0x%x)\n",
ecc_word, ecc_bit);
/* correct the error */
if (nand_chip->options & NAND_BUSWIDTH_16) {
/* 16 bits words */
((unsigned short *) dat)[ecc_word] ^= (1 << ecc_bit);
} else {
/* 8 bits words */
dat[ecc_word] ^= (1 << ecc_bit);
}
dev_warn(host->dev, "atmel_nand : error corrected\n");
return 1;
}
/*
* Enable HW ECC : unused on most chips
*/
static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
{
}
int atmel_hwecc_nand_init_param(struct nand_chip *nand, struct mtd_info *mtd)
{
nand->ecc.mode = NAND_ECC_HW;
nand->ecc.calculate = atmel_nand_calculate;
nand->ecc.correct = atmel_nand_correct;
nand->ecc.hwctl = atmel_nand_hwctl;
nand->ecc.read_page = atmel_nand_read_page;
nand->ecc.bytes = 4;
nand->ecc.strength = 4;
if (nand->ecc.mode == NAND_ECC_HW) {
/* ECC is calculated for the whole page (1 step) */
nand->ecc.size = mtd->writesize;
/* set ECC page size and oob layout */
switch (mtd->writesize) {
case 512:
nand->ecc.layout = &atmel_oobinfo_small;
ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR,
ATMEL_ECC_PAGESIZE_528);
break;
case 1024:
nand->ecc.layout = &atmel_oobinfo_large;
ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR,
ATMEL_ECC_PAGESIZE_1056);
break;
case 2048:
nand->ecc.layout = &atmel_oobinfo_large;
ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR,
ATMEL_ECC_PAGESIZE_2112);
break;
case 4096:
nand->ecc.layout = &atmel_oobinfo_large;
ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR,
ATMEL_ECC_PAGESIZE_4224);
break;
default:
/* page size not handled by HW ECC */
/* switching back to soft ECC */
nand->ecc.mode = NAND_ECC_SOFT;
nand->ecc.calculate = NULL;
nand->ecc.correct = NULL;
nand->ecc.hwctl = NULL;
nand->ecc.read_page = NULL;
nand->ecc.postpad = 0;
nand->ecc.prepad = 0;
nand->ecc.bytes = 0;
break;
}
}
return 0;
}
#endif /* CONFIG_ATMEL_NAND_HW_PMECC */
#endif /* CONFIG_ATMEL_NAND_HWECC */
static void at91_nand_hwcontrol(struct mtd_info *mtd,
int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtd_to_nand(mtd);
if (ctrl & NAND_CTRL_CHANGE) {
ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
IO_ADDR_W &= ~(CONFIG_SYS_NAND_MASK_ALE
| CONFIG_SYS_NAND_MASK_CLE);
if (ctrl & NAND_CLE)
IO_ADDR_W |= CONFIG_SYS_NAND_MASK_CLE;
if (ctrl & NAND_ALE)
IO_ADDR_W |= CONFIG_SYS_NAND_MASK_ALE;
#ifdef CONFIG_SYS_NAND_ENABLE_PIN
at91_set_gpio_value(CONFIG_SYS_NAND_ENABLE_PIN,
!(ctrl & NAND_NCE));
#endif
this->IO_ADDR_W = (void *) IO_ADDR_W;
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, this->IO_ADDR_W);
}
#ifdef CONFIG_SYS_NAND_READY_PIN
static int at91_nand_ready(struct mtd_info *mtd)
{
return at91_get_gpio_value(CONFIG_SYS_NAND_READY_PIN);
}
#endif
#ifdef CONFIG_SPL_BUILD
/* The following code is for SPL */
static struct mtd_info *mtd;
static struct nand_chip nand_chip;
static int nand_command(int block, int page, uint32_t offs, u8 cmd)
{
struct nand_chip *this = mtd_to_nand(mtd);
int page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT;
void (*hwctrl)(struct mtd_info *mtd, int cmd,
unsigned int ctrl) = this->cmd_ctrl;
while (!this->dev_ready(mtd))
;
if (cmd == NAND_CMD_READOOB) {
offs += CONFIG_SYS_NAND_PAGE_SIZE;
cmd = NAND_CMD_READ0;
}
hwctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
if ((this->options & NAND_BUSWIDTH_16) && !nand_opcode_8bits(cmd))
offs >>= 1;
hwctrl(mtd, offs & 0xff, NAND_CTRL_ALE | NAND_CTRL_CHANGE);
hwctrl(mtd, (offs >> 8) & 0xff, NAND_CTRL_ALE);
hwctrl(mtd, (page_addr & 0xff), NAND_CTRL_ALE);
hwctrl(mtd, ((page_addr >> 8) & 0xff), NAND_CTRL_ALE);
#ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE
hwctrl(mtd, (page_addr >> 16) & 0x0f, NAND_CTRL_ALE);
#endif
hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
hwctrl(mtd, NAND_CMD_READSTART, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
while (!this->dev_ready(mtd))
;
return 0;
}
static int nand_is_bad_block(int block)
{
struct nand_chip *this = mtd_to_nand(mtd);
nand_command(block, 0, CONFIG_SYS_NAND_BAD_BLOCK_POS, NAND_CMD_READOOB);
if (this->options & NAND_BUSWIDTH_16) {
if (readw(this->IO_ADDR_R) != 0xffff)
return 1;
} else {
if (readb(this->IO_ADDR_R) != 0xff)
return 1;
}
return 0;
}
#ifdef CONFIG_SPL_NAND_ECC
static int nand_ecc_pos[] = CONFIG_SYS_NAND_ECCPOS;
#define ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
CONFIG_SYS_NAND_ECCSIZE)
#define ECCTOTAL (ECCSTEPS * CONFIG_SYS_NAND_ECCBYTES)
static int nand_read_page(int block, int page, void *dst)
{
struct nand_chip *this = mtd_to_nand(mtd);
u_char ecc_calc[ECCTOTAL];
u_char ecc_code[ECCTOTAL];
u_char oob_data[CONFIG_SYS_NAND_OOBSIZE];
int eccsize = CONFIG_SYS_NAND_ECCSIZE;
int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
int eccsteps = ECCSTEPS;
int i;
uint8_t *p = dst;
nand_command(block, page, 0, NAND_CMD_READ0);
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
if (this->ecc.mode != NAND_ECC_SOFT)
this->ecc.hwctl(mtd, NAND_ECC_READ);
this->read_buf(mtd, p, eccsize);
this->ecc.calculate(mtd, p, &ecc_calc[i]);
}
this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
for (i = 0; i < ECCTOTAL; i++)
ecc_code[i] = oob_data[nand_ecc_pos[i]];
eccsteps = ECCSTEPS;
p = dst;
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
return 0;
}
int spl_nand_erase_one(int block, int page)
{
struct nand_chip *this = mtd_to_nand(mtd);
void (*hwctrl)(struct mtd_info *mtd, int cmd,
unsigned int ctrl) = this->cmd_ctrl;
int page_addr;
if (nand_chip.select_chip)
nand_chip.select_chip(mtd, 0);
page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT;
hwctrl(mtd, NAND_CMD_ERASE1, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
/* Row address */
hwctrl(mtd, (page_addr & 0xff), NAND_CTRL_ALE | NAND_CTRL_CHANGE);
hwctrl(mtd, ((page_addr >> 8) & 0xff),
NAND_CTRL_ALE | NAND_CTRL_CHANGE);
#ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE
/* One more address cycle for devices > 128MiB */
hwctrl(mtd, (page_addr >> 16) & 0x0f,
NAND_CTRL_ALE | NAND_CTRL_CHANGE);
#endif
hwctrl(mtd, NAND_CMD_ERASE2, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
while (!this->dev_ready(mtd))
;
nand_deselect();
return 0;
}
#else
static int nand_read_page(int block, int page, void *dst)
{
struct nand_chip *this = mtd_to_nand(mtd);
nand_command(block, page, 0, NAND_CMD_READ0);
atmel_nand_pmecc_read_page(mtd, this, dst, 0, page);
return 0;
}
#endif /* CONFIG_SPL_NAND_ECC */
int at91_nand_wait_ready(struct mtd_info *mtd)
{
struct nand_chip *this = mtd_to_nand(mtd);
udelay(this->chip_delay);
return 1;
}
int board_nand_init(struct nand_chip *nand)
{
int ret = 0;
nand->ecc.mode = NAND_ECC_SOFT;
#ifdef CONFIG_SYS_NAND_DBW_16
nand->options = NAND_BUSWIDTH_16;
nand->read_buf = nand_read_buf16;
#else
nand->read_buf = nand_read_buf;
#endif
nand->cmd_ctrl = at91_nand_hwcontrol;
#ifdef CONFIG_SYS_NAND_READY_PIN
nand->dev_ready = at91_nand_ready;
#else
nand->dev_ready = at91_nand_wait_ready;
#endif
nand->chip_delay = 20;
#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
nand->bbt_options |= NAND_BBT_USE_FLASH;
#endif
#ifdef CONFIG_ATMEL_NAND_HWECC
#ifdef CONFIG_ATMEL_NAND_HW_PMECC
ret = atmel_pmecc_nand_init_params(nand, mtd);
#endif
#endif
return ret;
}
void nand_init(void)
{
mtd = nand_to_mtd(&nand_chip);
mtd->writesize = CONFIG_SYS_NAND_PAGE_SIZE;
mtd->oobsize = CONFIG_SYS_NAND_OOBSIZE;
nand_chip.IO_ADDR_R = (void __iomem *)CONFIG_SYS_NAND_BASE;
nand_chip.IO_ADDR_W = (void __iomem *)CONFIG_SYS_NAND_BASE;
board_nand_init(&nand_chip);
#ifdef CONFIG_SPL_NAND_ECC
if (nand_chip.ecc.mode == NAND_ECC_SOFT) {
nand_chip.ecc.calculate = nand_calculate_ecc;
nand_chip.ecc.correct = nand_correct_data;
}
#endif
if (nand_chip.select_chip)
nand_chip.select_chip(mtd, 0);
}
void nand_deselect(void)
{
if (nand_chip.select_chip)
nand_chip.select_chip(mtd, -1);
}
#include "nand_spl_loaders.c"
#else
#ifndef CONFIG_SYS_NAND_BASE_LIST
#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
#endif
static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
static ulong base_addr[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST;
int atmel_nand_chip_init(int devnum, ulong base_addr)
{
int ret;
struct nand_chip *nand = &nand_chip[devnum];
struct mtd_info *mtd = nand_to_mtd(nand);
nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr;
#ifdef CONFIG_NAND_ECC_BCH
nand->ecc.mode = NAND_ECC_SOFT_BCH;
#else
nand->ecc.mode = NAND_ECC_SOFT;
#endif
#ifdef CONFIG_SYS_NAND_DBW_16
nand->options = NAND_BUSWIDTH_16;
#endif
nand->cmd_ctrl = at91_nand_hwcontrol;
#ifdef CONFIG_SYS_NAND_READY_PIN
nand->dev_ready = at91_nand_ready;
#endif
nand->chip_delay = 75;
#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
nand->bbt_options |= NAND_BBT_USE_FLASH;
#endif
ret = nand_scan_ident(mtd, CONFIG_SYS_NAND_MAX_CHIPS, NULL);
if (ret)
return ret;
#ifdef CONFIG_ATMEL_NAND_HWECC
#ifdef CONFIG_ATMEL_NAND_HW_PMECC
ret = atmel_pmecc_nand_init_params(nand, mtd);
#else
ret = atmel_hwecc_nand_init_param(nand, mtd);
#endif
if (ret)
return ret;
#endif
ret = nand_scan_tail(mtd);
if (!ret)
nand_register(devnum, mtd);
return ret;
}
void board_nand_init(void)
{
int i;
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
if (atmel_nand_chip_init(i, base_addr[i]))
dev_err(host->dev, "atmel_nand: Fail to initialize #%d chip",
i);
}
#endif /* CONFIG_SPL_BUILD */
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