u-boot/board/cssi/MCR3000/nand.c
Christophe Leroy 53193a4f07 powerpc, 8xx: Add support for MCR3000 board from CSSI
CS Systemes d'Information (CSSI) manufactures two boards, named MCR3000
and CMPC885 which are respectively based on MPC866 and MPC885 processors.

This patch adds support for the first board.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
2017-07-08 15:56:06 -04:00

65 lines
1.5 KiB
C

/*
* Copyright (C) 2010-2017 CS Systemes d'Information
* Florent Trinh Thai <florent.trinh-thai@c-s.fr>
* Christophe Leroy <christophe.leroy@c-s.fr>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <config.h>
#include <common.h>
#include <nand.h>
#include <asm/io.h>
#define BIT_CLE ((unsigned short)0x0800)
#define BIT_ALE ((unsigned short)0x0400)
#define BIT_NCE ((unsigned short)0x1000)
static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtdinfo->priv;
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
unsigned short pddat = 0;
/* The hardware control change */
if (ctrl & NAND_CTRL_CHANGE) {
pddat = in_be16(&immr->im_ioport.iop_pddat);
/* Clearing ALE and CLE */
pddat &= ~(BIT_CLE | BIT_ALE);
/* Driving NCE pin */
if (ctrl & NAND_NCE)
pddat &= ~BIT_NCE;
else
pddat |= BIT_NCE;
/* Driving CLE and ALE pin */
if (ctrl & NAND_CLE)
pddat |= BIT_CLE;
if (ctrl & NAND_ALE)
pddat |= BIT_ALE;
out_be16(&immr->im_ioport.iop_pddat, pddat);
}
/* Writing the command */
if (cmd != NAND_CMD_NONE)
out_8(this->IO_ADDR_W, cmd);
}
int board_nand_init(struct nand_chip *nand)
{
immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
/* Set GPIO Port */
setbits_be16(&immr->im_ioport.iop_pddir, 0x1c00);
clrbits_be16(&immr->im_ioport.iop_pdpar, 0x1c00);
clrsetbits_be16(&immr->im_ioport.iop_pddat, 0x0c00, 0x1000);
nand->chip_delay = 60;
nand->ecc.mode = NAND_ECC_SOFT;
nand->cmd_ctrl = nand_hwcontrol;
return 0;
}