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-rw-r--r--qemu/roms/u-boot/drivers/mtd/onenand/onenand_bbt.c266
1 files changed, 0 insertions, 266 deletions
diff --git a/qemu/roms/u-boot/drivers/mtd/onenand/onenand_bbt.c b/qemu/roms/u-boot/drivers/mtd/onenand/onenand_bbt.c
deleted file mode 100644
index 0267c2c5c..000000000
--- a/qemu/roms/u-boot/drivers/mtd/onenand/onenand_bbt.c
+++ /dev/null
@@ -1,266 +0,0 @@
-/*
- * linux/drivers/mtd/onenand/onenand_bbt.c
- *
- * Bad Block Table support for the OneNAND driver
- *
- * Copyright(c) 2005-2008 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>
-#include <linux/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;
- struct mtd_oob_ops ops;
- int rgn;
-
- 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 = this->chipsize >> (bbm->bbt_erase_shift - 1);
- startblock = 0;
- from = 0;
-
- ops.mode = MTD_OPS_PLACE_OOB;
- ops.ooblen = readlen;
- ops.oobbuf = buf;
- ops.len = ops.ooboffs = ops.retlen = ops.oobretlen = 0;
-
- for (i = startblock; i < numblocks;) {
- int ret;
-
- for (j = 0; j < len; j++) {
- /* No need to read pages fully,
- * just read required OOB bytes */
- ret = onenand_bbt_read_oob(mtd,
- from + j * mtd->writesize +
- bd->offs, &ops);
-
- /* If it is a initial bad block, just ignore it */
- if (ret == ONENAND_BBT_READ_FATAL_ERROR)
- return -EIO;
-
- if (ret || check_short_pattern
- (&buf[j * scanlen], scanlen, mtd->writesize, 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;
-
- if (FLEXONENAND(this)) {
- rgn = flexonenand_region(mtd, from);
- from += mtd->eraseregions[rgn].erasesize;
- } else
- 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) (onenand_block(this, offs) << 1);
- res = (bbm->bbt[block >> 3] >> (block & 0x06)) & 0x03;
-
- MTDDEBUG (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 = this->chipsize >> (this->erase_shift + 2);
- /* Allocate memory (2bit per block) */
- bbm->bbt = malloc(len);
- if (!bbm->bbt)
- 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);
-}