* (C) Copyright 2006-2008
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <nand.h>
#include <asm/io.h>
-#define CONFIG_SYS_NAND_READ_DELAY \
- { volatile int dummy; int i; for (i=0; i<10000; i++) dummy = i; }
-
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)
+
+
#if (CONFIG_SYS_NAND_PAGE_SIZE <= 512)
/*
* NAND command for small page NAND devices (512)
struct nand_chip *this = mtd->priv;
int page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT;
- if (this->dev_ready)
- while (!this->dev_ready(mtd))
- ;
- else
- CONFIG_SYS_NAND_READ_DELAY;
+ while (!this->dev_ready(mtd))
+ ;
/* Begin command latch cycle */
this->cmd_ctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
/*
* Wait a while for the data to be ready
*/
- if (this->dev_ready)
- while (!this->dev_ready(mtd))
- ;
- else
- CONFIG_SYS_NAND_READ_DELAY;
+ while (!this->dev_ready(mtd))
+ ;
return 0;
}
void (*hwctrl)(struct mtd_info *mtd, int cmd,
unsigned int ctrl) = this->cmd_ctrl;
- if (this->dev_ready)
- while (!this->dev_ready(mtd))
- ;
- else
- CONFIG_SYS_NAND_READ_DELAY;
+ while (!this->dev_ready(mtd))
+ ;
/* Emulate NAND_CMD_READOOB */
if (cmd == NAND_CMD_READOOB) {
/*
* Wait a while for the data to be ready
*/
- if (this->dev_ready)
- while (!this->dev_ready(mtd))
- ;
- else
- CONFIG_SYS_NAND_READ_DELAY;
+ while (!this->dev_ready(mtd))
+ ;
return 0;
}
nand_command(mtd, block, 0, CONFIG_SYS_NAND_BAD_BLOCK_POS, NAND_CMD_READOOB);
/*
- * Read one byte
+ * Read one byte (or two if it's a 16 bit chip).
*/
- if (readb(this->IO_ADDR_R) != 0xff)
- return 1;
+ 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;
}
+#if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST)
static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
{
struct nand_chip *this = mtd->priv;
- u_char *ecc_calc;
- u_char *ecc_code;
- u_char *oob_data;
+ u_char ecc_calc[ECCTOTAL];
+ u_char ecc_code[ECCTOTAL];
+ u_char oob_data[CONFIG_SYS_NAND_OOBSIZE];
int i;
int eccsize = CONFIG_SYS_NAND_ECCSIZE;
int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
- int eccsteps = CONFIG_SYS_NAND_ECCSTEPS;
+ int eccsteps = ECCSTEPS;
uint8_t *p = dst;
- int stat;
+ nand_command(mtd, block, page, 0, NAND_CMD_READOOB);
+ this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
nand_command(mtd, block, page, 0, NAND_CMD_READ0);
- /* No malloc available for now, just use some temporary locations
- * in SDRAM
- */
- ecc_calc = (u_char *)(CONFIG_SYS_SDRAM_BASE + 0x10000);
- ecc_code = ecc_calc + 0x100;
- oob_data = ecc_calc + 0x200;
+ /* Pick the ECC bytes out of the oob data */
+ for (i = 0; i < ECCTOTAL; i++)
+ ecc_code[i] = oob_data[nand_ecc_pos[i]];
+
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ this->ecc.hwctl(mtd, NAND_ECC_READ);
+ this->read_buf(mtd, p, eccsize);
+ this->ecc.calculate(mtd, p, &ecc_calc[i]);
+ this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
+ }
+
+ return 0;
+}
+#else
+static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
+{
+ struct nand_chip *this = mtd->priv;
+ u_char ecc_calc[ECCTOTAL];
+ u_char ecc_code[ECCTOTAL];
+ u_char oob_data[CONFIG_SYS_NAND_OOBSIZE];
+ int i;
+ int eccsize = CONFIG_SYS_NAND_ECCSIZE;
+ int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
+ int eccsteps = ECCSTEPS;
+ uint8_t *p = dst;
+
+ nand_command(mtd, block, page, 0, NAND_CMD_READ0);
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
this->ecc.hwctl(mtd, NAND_ECC_READ);
this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
/* Pick the ECC bytes out of the oob data */
- for (i = 0; i < CONFIG_SYS_NAND_ECCTOTAL; i++)
+ for (i = 0; i < ECCTOTAL; i++)
ecc_code[i] = oob_data[nand_ecc_pos[i]];
- eccsteps = CONFIG_SYS_NAND_ECCSTEPS;
+ eccsteps = ECCSTEPS;
p = dst;
for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
* from correct_data(). We just hope that all possible errors
* are corrected by this routine.
*/
- stat = this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
+ this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
}
return 0;
}
+#endif /* #if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST) */
static int nand_load(struct mtd_info *mtd, unsigned int offs,
unsigned int uboot_size, uchar *dst)
{
struct nand_chip nand_chip;
nand_info_t nand_info;
- int ret;
__attribute__((noreturn)) void (*uboot)(void);
/*
/*
* Load U-Boot image from NAND into RAM
*/
- ret = nand_load(&nand_info, CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
- (uchar *)CONFIG_SYS_NAND_U_BOOT_DST);
+ nand_load(&nand_info, CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
+ (uchar *)CONFIG_SYS_NAND_U_BOOT_DST);
#ifdef CONFIG_NAND_ENV_DST
nand_load(&nand_info, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,