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Diffstat (limited to 'drivers/mtd/nand/s3c64xx.c')
-rw-r--r--drivers/mtd/nand/s3c64xx.c295
1 files changed, 0 insertions, 295 deletions
diff --git a/drivers/mtd/nand/s3c64xx.c b/drivers/mtd/nand/s3c64xx.c
deleted file mode 100644
index 87f0341..0000000
--- a/drivers/mtd/nand/s3c64xx.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/*
- * (C) Copyright 2006 DENX Software Engineering
- *
- * Implementation for U-Boot 1.1.6 by Samsung
- *
- * (C) Copyright 2008
- * Guennadi Liakhovetki, DENX Software Engineering, <lg@denx.de>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-
-#include <nand.h>
-#include <linux/mtd/nand.h>
-
-#include <asm/arch/s3c6400.h>
-
-#include <asm/io.h>
-#include <asm/errno.h>
-
-#define MAX_CHIPS 2
-static int nand_cs[MAX_CHIPS] = {0, 1};
-
-#ifdef CONFIG_NAND_SPL
-#define printf(arg...) do {} while (0)
-#endif
-
-/* Nand flash definition values by jsgood */
-#ifdef S3C_NAND_DEBUG
-/*
- * Function to print out oob buffer for debugging
- * Written by jsgood
- */
-static void print_oob(const char *header, struct mtd_info *mtd)
-{
- int i;
- struct nand_chip *chip = mtd->priv;
-
- printf("%s:\t", header);
-
- for (i = 0; i < 64; i++)
- printf("%02x ", chip->oob_poi[i]);
-
- printf("\n");
-}
-#endif /* S3C_NAND_DEBUG */
-
-static void s3c_nand_select_chip(struct mtd_info *mtd, int chip)
-{
- int ctrl = readl(NFCONT);
-
- switch (chip) {
- case -1:
- ctrl |= 6;
- break;
- case 0:
- ctrl &= ~2;
- break;
- case 1:
- ctrl &= ~4;
- break;
- default:
- return;
- }
-
- writel(ctrl, NFCONT);
-}
-
-/*
- * Hardware specific access to control-lines function
- * Written by jsgood
- */
-static void s3c_nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- struct nand_chip *this = mtd->priv;
-
- if (ctrl & NAND_CTRL_CHANGE) {
- if (ctrl & NAND_CLE)
- this->IO_ADDR_W = (void __iomem *)NFCMMD;
- else if (ctrl & NAND_ALE)
- this->IO_ADDR_W = (void __iomem *)NFADDR;
- else
- this->IO_ADDR_W = (void __iomem *)NFDATA;
- if (ctrl & NAND_NCE)
- s3c_nand_select_chip(mtd, *(int *)this->priv);
- else
- s3c_nand_select_chip(mtd, -1);
- }
-
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, this->IO_ADDR_W);
-}
-
-/*
- * Function for checking device ready pin
- * Written by jsgood
- */
-static int s3c_nand_device_ready(struct mtd_info *mtdinfo)
-{
- return !!(readl(NFSTAT) & NFSTAT_RnB);
-}
-
-#ifdef CONFIG_SYS_S3C_NAND_HWECC
-/*
- * This function is called before encoding ecc codes to ready ecc engine.
- * Written by jsgood
- */
-static void s3c_nand_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- u_long nfcont, nfconf;
-
- /*
- * The original driver used 4-bit ECC for "new" MLC chips, i.e., for
- * those with non-zero ID[3][3:2], which anyway only holds for ST
- * (Numonyx) chips
- */
- nfconf = readl(NFCONF) & ~NFCONF_ECC_4BIT;
-
- writel(nfconf, NFCONF);
-
- /* Initialize & unlock */
- nfcont = readl(NFCONT);
- nfcont |= NFCONT_INITECC;
- nfcont &= ~NFCONT_MECCLOCK;
-
- if (mode == NAND_ECC_WRITE)
- nfcont |= NFCONT_ECC_ENC;
- else if (mode == NAND_ECC_READ)
- nfcont &= ~NFCONT_ECC_ENC;
-
- writel(nfcont, NFCONT);
-}
-
-/*
- * This function is called immediately after encoding ecc codes.
- * This function returns encoded ecc codes.
- * Written by jsgood
- */
-static int s3c_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
- u_char *ecc_code)
-{
- u_long nfcont, nfmecc0;
-
- /* Lock */
- nfcont = readl(NFCONT);
- nfcont |= NFCONT_MECCLOCK;
- writel(nfcont, NFCONT);
-
- nfmecc0 = readl(NFMECC0);
-
- ecc_code[0] = nfmecc0 & 0xff;
- ecc_code[1] = (nfmecc0 >> 8) & 0xff;
- ecc_code[2] = (nfmecc0 >> 16) & 0xff;
- ecc_code[3] = (nfmecc0 >> 24) & 0xff;
-
- return 0;
-}
-
-/*
- * This function determines whether read data is good or not.
- * If SLC, must write ecc codes to controller before reading status bit.
- * If MLC, status bit is already set, so only reading is needed.
- * If status bit is good, return 0.
- * If correctable errors occured, do that.
- * If uncorrectable errors occured, return -1.
- * Written by jsgood
- */
-static int s3c_nand_correct_data(struct mtd_info *mtd, u_char *dat,
- u_char *read_ecc, u_char *calc_ecc)
-{
- int ret = -1;
- u_long nfestat0, nfmeccdata0, nfmeccdata1, err_byte_addr;
- u_char err_type, repaired;
-
- /* SLC: Write ecc to compare */
- nfmeccdata0 = (calc_ecc[1] << 16) | calc_ecc[0];
- nfmeccdata1 = (calc_ecc[3] << 16) | calc_ecc[2];
- writel(nfmeccdata0, NFMECCDATA0);
- writel(nfmeccdata1, NFMECCDATA1);
-
- /* Read ecc status */
- nfestat0 = readl(NFESTAT0);
- err_type = nfestat0 & 0x3;
-
- switch (err_type) {
- case 0: /* No error */
- ret = 0;
- break;
-
- case 1:
- /*
- * 1 bit error (Correctable)
- * (nfestat0 >> 7) & 0x7ff :error byte number
- * (nfestat0 >> 4) & 0x7 :error bit number
- */
- err_byte_addr = (nfestat0 >> 7) & 0x7ff;
- repaired = dat[err_byte_addr] ^ (1 << ((nfestat0 >> 4) & 0x7));
-
- printf("S3C NAND: 1 bit error detected at byte %ld. "
- "Correcting from 0x%02x to 0x%02x...OK\n",
- err_byte_addr, dat[err_byte_addr], repaired);
-
- dat[err_byte_addr] = repaired;
-
- ret = 1;
- break;
-
- case 2: /* Multiple error */
- case 3: /* ECC area error */
- printf("S3C NAND: ECC uncorrectable error detected. "
- "Not correctable.\n");
- ret = -1;
- break;
- }
-
- return ret;
-}
-#endif /* CONFIG_SYS_S3C_NAND_HWECC */
-
-/*
- * Board-specific NAND initialization. The following members of the
- * argument are board-specific (per include/linux/mtd/nand.h):
- * - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
- * - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
- * - hwcontrol: hardwarespecific function for accesing control-lines
- * - dev_ready: hardwarespecific function for accesing device ready/busy line
- * - enable_hwecc?: function to enable (reset) hardware ecc generator. Must
- * only be provided if a hardware ECC is available
- * - eccmode: mode of ecc, see defines
- * - chip_delay: chip dependent delay for transfering data from array to
- * read regs (tR)
- * - options: various chip options. They can partly be set to inform
- * nand_scan about special functionality. See the defines for further
- * explanation
- * Members with a "?" were not set in the merged testing-NAND branch,
- * so they are not set here either.
- */
-int board_nand_init(struct nand_chip *nand)
-{
- static int chip_n;
-
- if (chip_n >= MAX_CHIPS)
- return -ENODEV;
-
- NFCONT_REG = (NFCONT_REG & ~NFCONT_WP) | NFCONT_ENABLE | 0x6;
-
- nand->IO_ADDR_R = (void __iomem *)NFDATA;
- nand->IO_ADDR_W = (void __iomem *)NFDATA;
- nand->cmd_ctrl = s3c_nand_hwcontrol;
- nand->dev_ready = s3c_nand_device_ready;
- nand->select_chip = s3c_nand_select_chip;
- nand->options = 0;
-#ifdef CONFIG_NAND_SPL
- nand->read_byte = nand_read_byte;
- nand->write_buf = nand_write_buf;
- nand->read_buf = nand_read_buf;
-#endif
-
-#ifdef CONFIG_SYS_S3C_NAND_HWECC
- nand->ecc.hwctl = s3c_nand_enable_hwecc;
- nand->ecc.calculate = s3c_nand_calculate_ecc;
- nand->ecc.correct = s3c_nand_correct_data;
-
- /*
- * If you get more than 1 NAND-chip with different page-sizes on the
- * board one day, it will get more complicated...
- */
- nand->ecc.mode = NAND_ECC_HW;
- nand->ecc.size = CONFIG_SYS_NAND_ECCSIZE;
- nand->ecc.bytes = CONFIG_SYS_NAND_ECCBYTES;
-#else
- nand->ecc.mode = NAND_ECC_SOFT;
-#endif /* ! CONFIG_SYS_S3C_NAND_HWECC */
-
- nand->priv = nand_cs + chip_n++;
-
- return 0;
-}