upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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159 lines
4.3 KiB
159 lines
4.3 KiB
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <nand.h>
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#include <s3c2410.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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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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debugX(1, "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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debugX(1, "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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debugX(1, "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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ecc_code[0] = NFECC0;
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ecc_code[1] = NFECC1;
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ecc_code[2] = NFECC2;
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debugX(1, "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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debugX(1, "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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twrph0 = 3;
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twrph1 = 0;
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tacls = 0;
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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 = nand->IO_ADDR_W = (void *)&nand_reg->NFDATA;
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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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/* 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_HW3_512;
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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->options = NAND_USE_FLASH_BBT;
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#else
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nand->options = 0;
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#endif
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debugX(1, "end of nand_init\n");
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return 0;
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}
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