drivers/mtd : move mtd drivers to drivers/mtd

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 0 insertions, 265 deletions

diff --git a/drivers/onenand/onenand_bbt.c b/drivers/onenand/onenand_bbt.c
deleted file mode 100644
index 5a610ee..0000000
--- a/drivers/onenand/onenand_bbt.c
+++ /dev/null
@@ -1,265 +0,0 @@
-/*
- *  linux/drivers/mtd/onenand/onenand_bbt.c
- *
- *  Bad Block Table support for the OneNAND driver
- *
- *  Copyright(c) 2005-2007 Samsung Electronics
- *  Kyungmin Park <kyungmin.park@samsung.com>
- *
- *  TODO:
- *    Split BBT core and chip specific BBT.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <common.h>
-
-#ifdef CONFIG_CMD_ONENAND
-
-#include <linux/mtd/compat.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/onenand.h>
-#include <malloc.h>
-
-#include <asm/errno.h>
-
-/**
- * check_short_pattern - [GENERIC] check if a pattern is in the buffer
- * @param buf		the buffer to search
- * @param len		the length of buffer to search
- * @param paglen	the pagelength
- * @param td		search pattern descriptor
- *
- * Check for a pattern at the given place. Used to search bad block
- * tables and good / bad block identifiers. Same as check_pattern, but
- * no optional empty check and the pattern is expected to start
- * at offset 0.
- */
-static int check_short_pattern(uint8_t * buf, int len, int paglen,
-			       struct nand_bbt_descr *td)
-{
-	int i;
-	uint8_t *p = buf;
-
-	/* Compare the pattern */
-	for (i = 0; i < td->len; i++) {
-		if (p[i] != td->pattern[i])
-			return -1;
-	}
-	return 0;
-}
-
-/**
- * create_bbt - [GENERIC] Create a bad block table by scanning the device
- * @param mtd		MTD device structure
- * @param buf		temporary buffer
- * @param bd		descriptor for the good/bad block search pattern
- * @param chip		create the table for a specific chip, -1 read all chips.
- *              Applies only if NAND_BBT_PERCHIP option is set
- *
- * Create a bad block table by scanning the device
- * for the given good/bad block identify pattern
- */
-static int create_bbt(struct mtd_info *mtd, uint8_t * buf,
-		      struct nand_bbt_descr *bd, int chip)
-{
-	struct onenand_chip *this = mtd->priv;
-	struct bbm_info *bbm = this->bbm;
-	int i, j, numblocks, len, scanlen;
-	int startblock;
-	loff_t from;
-	size_t readlen, ooblen;
-
-	printk(KERN_INFO "Scanning device for bad blocks\n");
-
-	len = 1;
-
-	/* We need only read few bytes from the OOB area */
-	scanlen = ooblen = 0;
-	readlen = bd->len;
-
-	/* chip == -1 case only */
-	/* Note that numblocks is 2 * (real numblocks) here;
-	 * see i += 2 below as it makses shifting and masking less painful
-	 */
-	numblocks = mtd->size >> (bbm->bbt_erase_shift - 1);
-	startblock = 0;
-	from = 0;
-
-	for (i = startblock; i < numblocks;) {
-		int ret;
-
-		for (j = 0; j < len; j++) {
-			size_t retlen;
-
-			/* No need to read pages fully,
-			 * just read required OOB bytes */
-			ret = onenand_read_oob(mtd,
-					     from + j * mtd->oobblock +
-					     bd->offs, readlen, &retlen,
-					     &buf[0]);
-
-			if (ret && ret != -EAGAIN) {
-				printk("ret = %d\n", ret);
-				return ret;
-			}
-
-			if (check_short_pattern
-			    (&buf[j * scanlen], scanlen, mtd->oobblock, bd)) {
-				bbm->bbt[i >> 3] |= 0x03 << (i & 0x6);
-				printk(KERN_WARNING
-				       "Bad eraseblock %d at 0x%08x\n", i >> 1,
-				       (unsigned int)from);
-				break;
-			}
-		}
-		i += 2;
-		from += (1 << bbm->bbt_erase_shift);
-	}
-
-	return 0;
-}
-
-/**
- * onenand_memory_bbt - [GENERIC] create a memory based bad block table
- * @param mtd		MTD device structure
- * @param bd		descriptor for the good/bad block search pattern
- *
- * The function creates a memory based bbt by scanning the device
- * for manufacturer / software marked good / bad blocks
- */
-static inline int onenand_memory_bbt(struct mtd_info *mtd,
-				     struct nand_bbt_descr *bd)
-{
-	unsigned char data_buf[MAX_ONENAND_PAGESIZE];
-
-	bd->options &= ~NAND_BBT_SCANEMPTY;
-	return create_bbt(mtd, data_buf, bd, -1);
-}
-
-/**
- * onenand_isbad_bbt - [OneNAND Interface] Check if a block is bad
- * @param mtd		MTD device structure
- * @param offs		offset in the device
- * @param allowbbt	allow access to bad block table region
- */
-static int onenand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
-{
-	struct onenand_chip *this = mtd->priv;
-	struct bbm_info *bbm = this->bbm;
-	int block;
-	uint8_t res;
-
-	/* Get block number * 2 */
-	block = (int)(offs >> (bbm->bbt_erase_shift - 1));
-	res = (bbm->bbt[block >> 3] >> (block & 0x06)) & 0x03;
-
-	DEBUG(MTD_DEBUG_LEVEL2,
-	      "onenand_isbad_bbt: bbt info for offs 0x%08x: (block %d) 0x%02x\n",
-	      (unsigned int)offs, block >> 1, res);
-
-	switch ((int)res) {
-	case 0x00:
-		return 0;
-	case 0x01:
-		return 1;
-	case 0x02:
-		return allowbbt ? 0 : 1;
-	}
-
-	return 1;
-}
-
-/**
- * onenand_scan_bbt - [OneNAND Interface] scan, find, read and maybe create bad block table(s)
- * @param mtd		MTD device structure
- * @param bd		descriptor for the good/bad block search pattern
- *
- * The function checks, if a bad block table(s) is/are already
- * available. If not it scans the device for manufacturer
- * marked good / bad blocks and writes the bad block table(s) to
- * the selected place.
- *
- * The bad block table memory is allocated here. It must be freed
- * by calling the onenand_free_bbt function.
- *
- */
-int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
-{
-	struct onenand_chip *this = mtd->priv;
-	struct bbm_info *bbm = this->bbm;
-	int len, ret = 0;
-
-	len = mtd->size >> (this->erase_shift + 2);
-	/* Allocate memory (2bit per block) */
-	bbm->bbt = malloc(len);
-	if (!bbm->bbt) {
-		printk(KERN_ERR "onenand_scan_bbt: Out of memory\n");
-		return -ENOMEM;
-	}
-	/* Clear the memory bad block table */
-	memset(bbm->bbt, 0x00, len);
-
-	/* Set the bad block position */
-	bbm->badblockpos = ONENAND_BADBLOCK_POS;
-
-	/* Set erase shift */
-	bbm->bbt_erase_shift = this->erase_shift;
-
-	if (!bbm->isbad_bbt)
-		bbm->isbad_bbt = onenand_isbad_bbt;
-
-	/* Scan the device to build a memory based bad block table */
-	if ((ret = onenand_memory_bbt(mtd, bd))) {
-		printk(KERN_ERR
-		       "onenand_scan_bbt: Can't scan flash and build the RAM-based BBT\n");
-		free(bbm->bbt);
-		bbm->bbt = NULL;
-	}
-
-	return ret;
-}
-
-/*
- * Define some generic bad / good block scan pattern which are used
- * while scanning a device for factory marked good / bad blocks.
- */
-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
-
-static struct nand_bbt_descr largepage_memorybased = {
-	.options = 0,
-	.offs = 0,
-	.len = 2,
-	.pattern = scan_ff_pattern,
-};
-
-/**
- * onenand_default_bbt - [OneNAND Interface] Select a default bad block table for the device
- * @param mtd		MTD device structure
- *
- * This function selects the default bad block table
- * support for the device and calls the onenand_scan_bbt function
- */
-int onenand_default_bbt(struct mtd_info *mtd)
-{
-	struct onenand_chip *this = mtd->priv;
-	struct bbm_info *bbm;
-
-	this->bbm = malloc(sizeof(struct bbm_info));
-	if (!this->bbm)
-		return -ENOMEM;
-
-	bbm = this->bbm;
-
-	memset(bbm, 0, sizeof(struct bbm_info));
-
-	/* 1KB page has same configuration as 2KB page */
-	if (!bbm->badblock_pattern)
-		bbm->badblock_pattern = &largepage_memorybased;
-
-	return onenand_scan_bbt(mtd, bbm->badblock_pattern);
-}
-
-#endif /* CFG_CMD_ONENAND */