mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 11:00:15 +00:00
c05ed00afb
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
226 lines
5.4 KiB
C
226 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2012
|
|
* Konstantin Kozhevnikov, Cogent Embedded
|
|
*
|
|
* based on nand_spl_simple code
|
|
*
|
|
* (C) Copyright 2006-2008
|
|
* Stefan Roese, DENX Software Engineering, sr@denx.de.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <nand.h>
|
|
#include <asm/io.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/mtd/nand_ecc.h>
|
|
|
|
static int nand_ecc_pos[] = CONFIG_SYS_NAND_ECCPOS;
|
|
static struct mtd_info *mtd;
|
|
static struct nand_chip nand_chip;
|
|
|
|
#define ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
|
|
CONFIG_SYS_NAND_ECCSIZE)
|
|
#define ECCTOTAL (ECCSTEPS * CONFIG_SYS_NAND_ECCBYTES)
|
|
|
|
|
|
/*
|
|
* NAND command for large page NAND devices (2k)
|
|
*/
|
|
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))
|
|
;
|
|
|
|
/* Emulate NAND_CMD_READOOB */
|
|
if (cmd == NAND_CMD_READOOB) {
|
|
offs += CONFIG_SYS_NAND_PAGE_SIZE;
|
|
cmd = NAND_CMD_READ0;
|
|
}
|
|
|
|
/* Begin command latch cycle */
|
|
hwctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
|
|
|
|
if (cmd == NAND_CMD_RESET) {
|
|
hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
|
|
|
|
/*
|
|
* Apply this short delay always to ensure that we do wait
|
|
* tWB in any case on any machine.
|
|
*/
|
|
ndelay(150);
|
|
|
|
while (!this->dev_ready(mtd))
|
|
;
|
|
return 0;
|
|
}
|
|
|
|
/* Shift the offset from byte addressing to word addressing. */
|
|
if ((this->options & NAND_BUSWIDTH_16) && !nand_opcode_8bits(cmd))
|
|
offs >>= 1;
|
|
|
|
/* Set ALE and clear CLE to start address cycle */
|
|
/* Column address */
|
|
hwctrl(mtd, offs & 0xff,
|
|
NAND_CTRL_ALE | NAND_CTRL_CHANGE); /* A[7:0] */
|
|
hwctrl(mtd, (offs >> 8) & 0xff, NAND_CTRL_ALE); /* A[11:9] */
|
|
/* Row address */
|
|
if (cmd != NAND_CMD_RNDOUT) {
|
|
hwctrl(mtd, (page_addr & 0xff),
|
|
NAND_CTRL_ALE); /* A[19:12] */
|
|
hwctrl(mtd, ((page_addr >> 8) & 0xff),
|
|
NAND_CTRL_ALE); /* A[27:20] */
|
|
#ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE
|
|
/* One more address cycle for devices > 128MiB */
|
|
hwctrl(mtd, (page_addr >> 16) & 0x0f,
|
|
NAND_CTRL_ALE); /* A[31:28] */
|
|
#endif
|
|
}
|
|
|
|
hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
|
|
|
|
|
|
/*
|
|
* Program and erase have their own busy handlers status, sequential
|
|
* in and status need no delay.
|
|
*/
|
|
switch (cmd) {
|
|
case NAND_CMD_CACHEDPROG:
|
|
case NAND_CMD_PAGEPROG:
|
|
case NAND_CMD_ERASE1:
|
|
case NAND_CMD_ERASE2:
|
|
case NAND_CMD_SEQIN:
|
|
case NAND_CMD_RNDIN:
|
|
case NAND_CMD_STATUS:
|
|
return 0;
|
|
|
|
case NAND_CMD_RNDOUT:
|
|
/* No ready / busy check necessary */
|
|
hwctrl(mtd, NAND_CMD_RNDOUTSTART, NAND_CTRL_CLE |
|
|
NAND_CTRL_CHANGE);
|
|
hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
|
|
return 0;
|
|
|
|
case NAND_CMD_READ0:
|
|
/* Latch in address */
|
|
hwctrl(mtd, NAND_CMD_READSTART,
|
|
NAND_CTRL_CLE | NAND_CTRL_CHANGE);
|
|
hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
|
|
}
|
|
|
|
/*
|
|
* Apply this short delay always to ensure that we do wait tWB in
|
|
* any case on any machine.
|
|
*/
|
|
ndelay(150);
|
|
|
|
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);
|
|
|
|
/*
|
|
* Read one byte (or two if it's a 16 bit chip).
|
|
*/
|
|
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;
|
|
}
|
|
|
|
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 i;
|
|
int eccsize = CONFIG_SYS_NAND_ECCSIZE;
|
|
int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
|
|
int eccsteps = ECCSTEPS;
|
|
uint8_t *p = dst;
|
|
uint32_t data_pos = 0;
|
|
uint8_t *oob = &oob_data[0] + nand_ecc_pos[0];
|
|
uint32_t oob_pos = eccsize * eccsteps + nand_ecc_pos[0];
|
|
|
|
nand_command(block, page, 0, NAND_CMD_READ0);
|
|
|
|
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
|
|
this->ecc.hwctl(mtd, NAND_ECC_READ);
|
|
nand_command(block, page, data_pos, NAND_CMD_RNDOUT);
|
|
|
|
this->read_buf(mtd, p, eccsize);
|
|
|
|
nand_command(block, page, oob_pos, NAND_CMD_RNDOUT);
|
|
|
|
this->read_buf(mtd, oob, eccbytes);
|
|
this->ecc.calculate(mtd, p, &ecc_calc[i]);
|
|
|
|
data_pos += eccsize;
|
|
oob_pos += eccbytes;
|
|
oob += eccbytes;
|
|
}
|
|
|
|
/* Pick the ECC bytes out of the oob data */
|
|
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) {
|
|
/* No chance to do something with the possible error message
|
|
* from correct_data(). We just hope that all possible errors
|
|
* are corrected by this routine.
|
|
*/
|
|
this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* nand_init() - initialize data to make nand usable by SPL */
|
|
void nand_init(void)
|
|
{
|
|
/*
|
|
* Init board specific nand support
|
|
*/
|
|
mtd = nand_to_mtd(&nand_chip);
|
|
nand_chip.IO_ADDR_R = nand_chip.IO_ADDR_W =
|
|
(void __iomem *)CONFIG_SYS_NAND_BASE;
|
|
board_nand_init(&nand_chip);
|
|
|
|
if (nand_chip.select_chip)
|
|
nand_chip.select_chip(mtd, 0);
|
|
|
|
/* NAND chip may require reset after power-on */
|
|
nand_command(0, 0, 0, NAND_CMD_RESET);
|
|
}
|
|
|
|
/* Unselect after operation */
|
|
void nand_deselect(void)
|
|
{
|
|
if (nand_chip.select_chip)
|
|
nand_chip.select_chip(mtd, -1);
|
|
}
|
|
|
|
#include "nand_spl_loaders.c"
|