mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-13 08:27:23 +00:00
ceee07b658
Updates the NAND code to match Linux v4.6. The previous sync was from
Linux v4.1 in commit d3963721d9.
Note that none of the individual NAND drivers tracked Linux closely
enough to be synced themselves, other than manually applying a few
cross-tree changes.
Signed-off-by: Scott Wood <oss@buserror.net>
Tested-by: Heiko Schocher <hs@denx.de>
175 lines
4.4 KiB
C
175 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_to_nand(mtd);
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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 s3c24x0_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
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{
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struct nand_chip *chip = mtd_to_nand(mtd);
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struct s3c24x0_nand *nand = s3c24x0_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 s3c24x0_dev_ready(struct mtd_info *mtd)
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{
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struct s3c24x0_nand *nand = s3c24x0_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 s3c24x0_nand_enable_hwecc(struct mtd_info *mtd, int mode)
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{
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struct s3c24x0_nand *nand = s3c24x0_get_base_nand();
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debug("s3c24x0_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 s3c24x0_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 s3c24x0_nand *nand = s3c24x0_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("s3c24x0_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 s3c24x0_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("s3c24x0_nand_correct_data: not implemented\n");
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return -EBADMSG;
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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 s3c24x0_nand *nand_reg = s3c24x0_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 = s3c24x0_hwcontrol;
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nand->dev_ready = s3c24x0_dev_ready;
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#ifdef CONFIG_S3C2410_NAND_HWECC
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nand->ecc.hwctl = s3c24x0_nand_enable_hwecc;
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nand->ecc.calculate = s3c24x0_nand_calculate_ecc;
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nand->ecc.correct = s3c24x0_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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