arm: Remove support for unused s3c64xx

Following the removal of the smdk6400 board, the s3c64xx SoC becomes unused, so
remove associated code. It will still be possible to restore it later from the
Git history if necessary.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>

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;
-}