mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-26 05:34:30 +08:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
|
|
* (C) Copyright 2007
|
|
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
|
|
#if defined(CONFIG_CMD_NAND)
|
|
|
|
#include <nand.h>
|
|
#include <asm/processor.h>
|
|
|
|
#define readb(addr) *(volatile u_char *)(addr)
|
|
#define readl(addr) *(volatile u_long *)(addr)
|
|
#define writeb(d,addr) *(volatile u_char *)(addr) = (d)
|
|
|
|
#define SC3_NAND_ALE 29 /* GPIO PIN 3 */
|
|
#define SC3_NAND_CLE 30 /* GPIO PIN 2 */
|
|
#define SC3_NAND_CE 27 /* GPIO PIN 5 */
|
|
|
|
static void *sc3_io_base;
|
|
static void *sc3_control_base = (void *)0xEF600700;
|
|
|
|
static void sc3_nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
|
|
{
|
|
struct nand_chip *this = mtd->priv;
|
|
if (ctrl & NAND_CTRL_CHANGE) {
|
|
if ( ctrl & NAND_CLE )
|
|
set_bit (SC3_NAND_CLE, sc3_control_base);
|
|
else
|
|
clear_bit (SC3_NAND_CLE, sc3_control_base);
|
|
if ( ctrl & NAND_ALE )
|
|
set_bit (SC3_NAND_ALE, sc3_control_base);
|
|
else
|
|
clear_bit (SC3_NAND_ALE, sc3_control_base);
|
|
if ( ctrl & NAND_NCE )
|
|
set_bit (SC3_NAND_CE, sc3_control_base);
|
|
else
|
|
clear_bit (SC3_NAND_CE, sc3_control_base);
|
|
}
|
|
|
|
if (cmd != NAND_CMD_NONE)
|
|
writeb(cmd, this->IO_ADDR_W);
|
|
}
|
|
|
|
static int sc3_nand_dev_ready(struct mtd_info *mtd)
|
|
{
|
|
if (!(readl(sc3_control_base + 0x1C) & 0x4000))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void sc3_select_chip(struct mtd_info *mtd, int chip)
|
|
{
|
|
clear_bit (SC3_NAND_CE, sc3_control_base);
|
|
}
|
|
|
|
int board_nand_init(struct nand_chip *nand)
|
|
{
|
|
nand->ecc.mode = NAND_ECC_SOFT;
|
|
|
|
sc3_io_base = (void *) CONFIG_SYS_NAND_BASE;
|
|
/* Set address of NAND IO lines (Using Linear Data Access Region) */
|
|
nand->IO_ADDR_R = (void __iomem *) sc3_io_base;
|
|
nand->IO_ADDR_W = (void __iomem *) sc3_io_base;
|
|
/* Reference hardware control function */
|
|
nand->cmd_ctrl = sc3_nand_hwcontrol;
|
|
nand->dev_ready = sc3_nand_dev_ready;
|
|
nand->select_chip = sc3_select_chip;
|
|
return 0;
|
|
}
|
|
#endif
|