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https://github.com/AsahiLinux/u-boot
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47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2010-2020 CS Group
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* Florent Trinh Thai <florent.trinh-thai@c-s.fr>
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* Christophe Leroy <christophe.leroy@c-s.fr>
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* Charles Frey <charles.frey@c-s.fr>
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*/
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#include <config.h>
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#include <nand.h>
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#include <linux/bitops.h>
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#include <linux/mtd/rawnand.h>
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#include <asm/io.h>
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#define BIT_CLE BIT(3)
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#define BIT_ALE BIT(2)
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#define BIT_NCE BIT(0)
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static u32 nand_mask(unsigned int ctrl)
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{
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return ((ctrl & NAND_CLE) ? BIT_CLE : 0) |
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((ctrl & NAND_ALE) ? BIT_ALE : 0) |
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(!(ctrl & NAND_NCE) ? BIT_NCE : 0);
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}
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static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
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{
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immap_t __iomem *immr = (immap_t __iomem *)CONFIG_SYS_IMMR;
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struct nand_chip *chip = mtd_to_nand(mtdinfo);
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if (ctrl & NAND_CTRL_CHANGE)
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clrsetbits_be16(&immr->im_ioport.iop_pddat,
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BIT_CLE | BIT_ALE | BIT_NCE, nand_mask(ctrl));
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if (cmd != NAND_CMD_NONE)
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out_8(chip->IO_ADDR_W, cmd);
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}
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int board_nand_init(struct nand_chip *chip)
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{
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chip->chip_delay = 60;
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chip->ecc.mode = NAND_ECC_SOFT;
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chip->cmd_ctrl = nand_hwcontrol;
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return 0;
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}
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