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![Wolfgang Denk](/assets/img/avatar_default.png)
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
176 lines
4.4 KiB
C
176 lines
4.4 KiB
C
/*
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* (C) Copyright 2006 OpenMoko, Inc.
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* Author: Harald Welte <laforge@openmoko.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <nand.h>
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#include <asm/arch/s3c24x0_cpu.h>
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#include <asm/io.h>
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#define S3C2410_NFCONF_EN (1<<15)
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#define S3C2410_NFCONF_512BYTE (1<<14)
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#define S3C2410_NFCONF_4STEP (1<<13)
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#define S3C2410_NFCONF_INITECC (1<<12)
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#define S3C2410_NFCONF_nFCE (1<<11)
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#define S3C2410_NFCONF_TACLS(x) ((x)<<8)
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#define S3C2410_NFCONF_TWRPH0(x) ((x)<<4)
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#define S3C2410_NFCONF_TWRPH1(x) ((x)<<0)
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#define S3C2410_ADDR_NALE 4
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#define S3C2410_ADDR_NCLE 8
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#ifdef CONFIG_NAND_SPL
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/* in the early stage of NAND flash booting, printf() is not available */
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#define printf(fmt, args...)
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static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
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{
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int i;
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struct nand_chip *this = mtd->priv;
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for (i = 0; i < len; i++)
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buf[i] = readb(this->IO_ADDR_R);
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}
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#endif
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static void s3c2410_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
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{
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struct nand_chip *chip = mtd->priv;
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struct s3c2410_nand *nand = s3c2410_get_base_nand();
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debug("hwcontrol(): 0x%02x 0x%02x\n", cmd, ctrl);
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if (ctrl & NAND_CTRL_CHANGE) {
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ulong IO_ADDR_W = (ulong)nand;
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if (!(ctrl & NAND_CLE))
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IO_ADDR_W |= S3C2410_ADDR_NCLE;
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if (!(ctrl & NAND_ALE))
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IO_ADDR_W |= S3C2410_ADDR_NALE;
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chip->IO_ADDR_W = (void *)IO_ADDR_W;
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if (ctrl & NAND_NCE)
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writel(readl(&nand->nfconf) & ~S3C2410_NFCONF_nFCE,
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&nand->nfconf);
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else
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writel(readl(&nand->nfconf) | S3C2410_NFCONF_nFCE,
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&nand->nfconf);
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}
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if (cmd != NAND_CMD_NONE)
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writeb(cmd, chip->IO_ADDR_W);
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}
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static int s3c2410_dev_ready(struct mtd_info *mtd)
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{
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struct s3c2410_nand *nand = s3c2410_get_base_nand();
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debug("dev_ready\n");
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return readl(&nand->nfstat) & 0x01;
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}
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#ifdef CONFIG_S3C2410_NAND_HWECC
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void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode)
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{
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struct s3c2410_nand *nand = s3c2410_get_base_nand();
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debug("s3c2410_nand_enable_hwecc(%p, %d)\n", mtd, mode);
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writel(readl(&nand->nfconf) | S3C2410_NFCONF_INITECC, &nand->nfconf);
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}
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static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
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u_char *ecc_code)
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{
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struct s3c2410_nand *nand = s3c2410_get_base_nand();
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ecc_code[0] = readb(&nand->nfecc);
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ecc_code[1] = readb(&nand->nfecc + 1);
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ecc_code[2] = readb(&nand->nfecc + 2);
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debug("s3c2410_nand_calculate_hwecc(%p,): 0x%02x 0x%02x 0x%02x\n",
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mtd , ecc_code[0], ecc_code[1], ecc_code[2]);
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return 0;
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}
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static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
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u_char *read_ecc, u_char *calc_ecc)
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{
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if (read_ecc[0] == calc_ecc[0] &&
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read_ecc[1] == calc_ecc[1] &&
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read_ecc[2] == calc_ecc[2])
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return 0;
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printf("s3c2410_nand_correct_data: not implemented\n");
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return -1;
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}
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#endif
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int board_nand_init(struct nand_chip *nand)
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{
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u_int32_t cfg;
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u_int8_t tacls, twrph0, twrph1;
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struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
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struct s3c2410_nand *nand_reg = s3c2410_get_base_nand();
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debug("board_nand_init()\n");
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writel(readl(&clk_power->clkcon) | (1 << 4), &clk_power->clkcon);
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/* initialize hardware */
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#if defined(CONFIG_S3C24XX_CUSTOM_NAND_TIMING)
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tacls = CONFIG_S3C24XX_TACLS;
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twrph0 = CONFIG_S3C24XX_TWRPH0;
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twrph1 = CONFIG_S3C24XX_TWRPH1;
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#else
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tacls = 4;
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twrph0 = 8;
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twrph1 = 8;
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#endif
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cfg = S3C2410_NFCONF_EN;
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cfg |= S3C2410_NFCONF_TACLS(tacls - 1);
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cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1);
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cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1);
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writel(cfg, &nand_reg->nfconf);
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/* initialize nand_chip data structure */
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nand->IO_ADDR_R = (void *)&nand_reg->nfdata;
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nand->IO_ADDR_W = (void *)&nand_reg->nfdata;
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nand->select_chip = NULL;
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/* read_buf and write_buf are default */
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/* read_byte and write_byte are default */
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#ifdef CONFIG_NAND_SPL
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nand->read_buf = nand_read_buf;
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#endif
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/* hwcontrol always must be implemented */
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nand->cmd_ctrl = s3c2410_hwcontrol;
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nand->dev_ready = s3c2410_dev_ready;
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#ifdef CONFIG_S3C2410_NAND_HWECC
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nand->ecc.hwctl = s3c2410_nand_enable_hwecc;
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nand->ecc.calculate = s3c2410_nand_calculate_ecc;
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nand->ecc.correct = s3c2410_nand_correct_data;
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nand->ecc.mode = NAND_ECC_HW;
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nand->ecc.size = CONFIG_SYS_NAND_ECCSIZE;
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nand->ecc.bytes = CONFIG_SYS_NAND_ECCBYTES;
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nand->ecc.strength = 1;
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#else
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nand->ecc.mode = NAND_ECC_SOFT;
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#endif
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#ifdef CONFIG_S3C2410_NAND_BBT
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nand->bbt_options |= NAND_BBT_USE_FLASH;
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#endif
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debug("end of nand_init\n");
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return 0;
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}
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