Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/mtd/nand_bbt.c |
| 3 | * |
| 4 | * Overview: |
| 5 | * Bad block table support for the NAND driver |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 6 | * |
Fabio Estevam | d159c4e | 2012-07-28 19:29:25 -0300 | [diff] [blame] | 7 | * Copyright © 2004 Thomas Gleixner (tglx@linutronix.de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * Description: |
| 14 | * |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 15 | * When nand_scan_bbt is called, then it tries to find the bad block table |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 16 | * depending on the options in the BBT descriptor(s). If no flash based BBT |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 17 | * (NAND_BBT_USE_FLASH) is specified then the device is scanned for factory |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 18 | * marked good / bad blocks. This information is used to create a memory BBT. |
| 19 | * Once a new bad block is discovered then the "factory" information is updated |
| 20 | * on the device. |
| 21 | * If a flash based BBT is specified then the function first tries to find the |
| 22 | * BBT on flash. If a BBT is found then the contents are read and the memory |
| 23 | * based BBT is created. If a mirrored BBT is selected then the mirror is |
| 24 | * searched too and the versions are compared. If the mirror has a greater |
Huang Shijie | 44ed0ff | 2012-07-03 16:44:15 +0800 | [diff] [blame] | 25 | * version number, then the mirror BBT is used to build the memory based BBT. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | * If the tables are not versioned, then we "or" the bad block information. |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 27 | * If one of the BBTs is out of date or does not exist it is (re)created. |
| 28 | * If no BBT exists at all then the device is scanned for factory marked |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 29 | * good / bad blocks and the bad block tables are created. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | * |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 31 | * For manufacturer created BBTs like the one found on M-SYS DOC devices |
| 32 | * the BBT is searched and read but never created |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | * |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 34 | * The auto generated bad block table is located in the last good blocks |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 35 | * of the device. The table is mirrored, so it can be updated eventually. |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 36 | * The table is marked in the OOB area with an ident pattern and a version |
| 37 | * number which indicates which of both tables is more up to date. If the NAND |
| 38 | * controller needs the complete OOB area for the ECC information then the |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 39 | * option NAND_BBT_NO_OOB should be used (along with NAND_BBT_USE_FLASH, of |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 40 | * course): it moves the ident pattern and the version byte into the data area |
| 41 | * and the OOB area will remain untouched. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | * |
| 43 | * The table uses 2 bits per block |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 44 | * 11b: block is good |
| 45 | * 00b: block is factory marked bad |
| 46 | * 01b, 10b: block is marked bad due to wear |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | * |
| 48 | * The memory bad block table uses the following scheme: |
| 49 | * 00b: block is good |
| 50 | * 01b: block is marked bad due to wear |
| 51 | * 10b: block is reserved (to protect the bbt area) |
| 52 | * 11b: block is factory marked bad |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 53 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | * Multichip devices like DOC store the bad block info per floor. |
| 55 | * |
| 56 | * Following assumptions are made: |
| 57 | * - bbts start at a page boundary, if autolocated on a block boundary |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 58 | * - the space necessary for a bbt in FLASH does not exceed a block boundary |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 59 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | */ |
| 61 | |
| 62 | #include <linux/slab.h> |
| 63 | #include <linux/types.h> |
| 64 | #include <linux/mtd/mtd.h> |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 65 | #include <linux/mtd/bbm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #include <linux/mtd/nand.h> |
| 67 | #include <linux/mtd/nand_ecc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #include <linux/bitops.h> |
| 69 | #include <linux/delay.h> |
David Woodhouse | c3f8abf | 2006-05-13 04:03:42 +0100 | [diff] [blame] | 70 | #include <linux/vmalloc.h> |
Paul Gortmaker | f3bcc01 | 2011-07-10 12:43:28 -0400 | [diff] [blame] | 71 | #include <linux/export.h> |
Brian Norris | 491ed06 | 2012-06-22 16:35:44 -0700 | [diff] [blame] | 72 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 74 | #define BBT_BLOCK_GOOD 0x00 |
| 75 | #define BBT_BLOCK_WORN 0x01 |
| 76 | #define BBT_BLOCK_RESERVED 0x02 |
| 77 | #define BBT_BLOCK_FACTORY_BAD 0x03 |
| 78 | |
| 79 | #define BBT_ENTRY_MASK 0x03 |
| 80 | #define BBT_ENTRY_SHIFT 2 |
| 81 | |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 82 | static int nand_update_bbt(struct mtd_info *mtd, loff_t offs); |
| 83 | |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 84 | static inline uint8_t bbt_get_entry(struct nand_chip *chip, int block) |
| 85 | { |
| 86 | uint8_t entry = chip->bbt[block >> BBT_ENTRY_SHIFT]; |
| 87 | entry >>= (block & BBT_ENTRY_MASK) * 2; |
| 88 | return entry & BBT_ENTRY_MASK; |
| 89 | } |
| 90 | |
| 91 | static inline void bbt_mark_entry(struct nand_chip *chip, int block, |
| 92 | uint8_t mark) |
| 93 | { |
| 94 | uint8_t msk = (mark & BBT_ENTRY_MASK) << ((block & BBT_ENTRY_MASK) * 2); |
| 95 | chip->bbt[block >> BBT_ENTRY_SHIFT] |= msk; |
| 96 | } |
| 97 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 98 | static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td) |
| 99 | { |
Brian Norris | 718894a | 2012-06-22 16:35:43 -0700 | [diff] [blame] | 100 | if (memcmp(buf, td->pattern, td->len)) |
| 101 | return -1; |
| 102 | return 0; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 103 | } |
| 104 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 105 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | * check_pattern - [GENERIC] check if a pattern is in the buffer |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 107 | * @buf: the buffer to search |
| 108 | * @len: the length of buffer to search |
| 109 | * @paglen: the pagelength |
| 110 | * @td: search pattern descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 112 | * Check for a pattern at the given place. Used to search bad block tables and |
Brian Norris | dad2256 | 2013-07-30 17:53:00 -0700 | [diff] [blame] | 113 | * good / bad block identifiers. |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 114 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 115 | static int check_pattern(uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 117 | if (td->options & NAND_BBT_NO_OOB) |
| 118 | return check_pattern_no_oob(buf, td); |
| 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | /* Compare the pattern */ |
Brian Norris | dad2256 | 2013-07-30 17:53:00 -0700 | [diff] [blame] | 121 | if (memcmp(buf + paglen + td->offs, td->pattern, td->len)) |
Brian Norris | 75b66d8 | 2011-09-07 13:13:41 -0700 | [diff] [blame] | 122 | return -1; |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | return 0; |
| 125 | } |
| 126 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 127 | /** |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 128 | * check_short_pattern - [GENERIC] check if a pattern is in the buffer |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 129 | * @buf: the buffer to search |
| 130 | * @td: search pattern descriptor |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 131 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 132 | * Check for a pattern at the given place. Used to search bad block tables and |
| 133 | * good / bad block identifiers. Same as check_pattern, but no optional empty |
| 134 | * check. |
| 135 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 136 | static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td) |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 137 | { |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 138 | /* Compare the pattern */ |
Brian Norris | 491ed06 | 2012-06-22 16:35:44 -0700 | [diff] [blame] | 139 | if (memcmp(buf + td->offs, td->pattern, td->len)) |
| 140 | return -1; |
Thomas Gleixner | c9e05365 | 2005-06-14 16:39:57 +0100 | [diff] [blame] | 141 | return 0; |
| 142 | } |
| 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | /** |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 145 | * add_marker_len - compute the length of the marker in data area |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 146 | * @td: BBT descriptor used for computation |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 147 | * |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 148 | * The length will be 0 if the marker is located in OOB area. |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 149 | */ |
| 150 | static u32 add_marker_len(struct nand_bbt_descr *td) |
| 151 | { |
| 152 | u32 len; |
| 153 | |
| 154 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 155 | return 0; |
| 156 | |
| 157 | len = td->len; |
| 158 | if (td->options & NAND_BBT_VERSION) |
| 159 | len++; |
| 160 | return len; |
| 161 | } |
| 162 | |
| 163 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | * read_bbt - [GENERIC] Read the bad block table starting from page |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 165 | * @mtd: MTD device structure |
| 166 | * @buf: temporary buffer |
| 167 | * @page: the starting page |
| 168 | * @num: the number of bbt descriptors to read |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 169 | * @td: the bbt describtion table |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 170 | * @offs: block number offset in the table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | * |
| 172 | * Read the bad block table starting from page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 174 | static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num, |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 175 | struct nand_bbt_descr *td, int offs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 177 | int res, ret = 0, i, j, act = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | struct nand_chip *this = mtd->priv; |
| 179 | size_t retlen, len, totlen; |
| 180 | loff_t from; |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 181 | int bits = td->options & NAND_BBT_NRBITS_MSK; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 182 | uint8_t msk = (uint8_t)((1 << bits) - 1); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 183 | u32 marker_len; |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 184 | int reserved_block_code = td->reserved_block_code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
| 186 | totlen = (num * bits) >> 3; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 187 | marker_len = add_marker_len(td); |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 188 | from = ((loff_t)page) << this->page_shift; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | while (totlen) { |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 191 | len = min(totlen, (size_t)(1 << this->bbt_erase_shift)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 192 | if (marker_len) { |
| 193 | /* |
| 194 | * In case the BBT marker is not in the OOB area it |
| 195 | * will be just in the first page. |
| 196 | */ |
| 197 | len -= marker_len; |
| 198 | from += marker_len; |
| 199 | marker_len = 0; |
| 200 | } |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 201 | res = mtd_read(mtd, from, len, &retlen, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | if (res < 0) { |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 203 | if (mtd_is_eccerr(res)) { |
| 204 | pr_info("nand_bbt: ECC error in BBT at " |
| 205 | "0x%012llx\n", from & ~mtd->writesize); |
| 206 | return res; |
| 207 | } else if (mtd_is_bitflip(res)) { |
| 208 | pr_info("nand_bbt: corrected error in BBT at " |
| 209 | "0x%012llx\n", from & ~mtd->writesize); |
| 210 | ret = res; |
| 211 | } else { |
| 212 | pr_info("nand_bbt: error reading BBT\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | return res; |
| 214 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 215 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
| 217 | /* Analyse data */ |
| 218 | for (i = 0; i < len; i++) { |
| 219 | uint8_t dat = buf[i]; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 220 | for (j = 0; j < 8; j += bits, act++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | uint8_t tmp = (dat >> j) & msk; |
| 222 | if (tmp == msk) |
| 223 | continue; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 224 | if (reserved_block_code && (tmp == reserved_block_code)) { |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 225 | pr_info("nand_read_bbt: reserved block at 0x%012llx\n", |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 226 | (loff_t)(offs + act) << |
| 227 | this->bbt_erase_shift); |
| 228 | bbt_mark_entry(this, offs + act, |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 229 | BBT_BLOCK_RESERVED); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 230 | mtd->ecc_stats.bbtblocks++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | continue; |
| 232 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 233 | /* |
| 234 | * Leave it for now, if it's matured we can |
Brian Norris | a0f5080 | 2011-07-19 10:06:06 -0700 | [diff] [blame] | 235 | * move this message to pr_debug. |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 236 | */ |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 237 | pr_info("nand_read_bbt: bad block at 0x%012llx\n", |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 238 | (loff_t)(offs + act) << |
| 239 | this->bbt_erase_shift); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 240 | /* Factory marked bad or worn out? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if (tmp == 0) |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 242 | bbt_mark_entry(this, offs + act, |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 243 | BBT_BLOCK_FACTORY_BAD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | else |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 245 | bbt_mark_entry(this, offs + act, |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 246 | BBT_BLOCK_WORN); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 247 | mtd->ecc_stats.badblocks++; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
| 250 | totlen -= len; |
| 251 | from += len; |
| 252 | } |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 253 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | /** |
| 257 | * read_abs_bbt - [GENERIC] Read the bad block table starting at a given page |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 258 | * @mtd: MTD device structure |
| 259 | * @buf: temporary buffer |
| 260 | * @td: descriptor for the bad block table |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 261 | * @chip: read the table for a specific chip, -1 read all chips; applies only if |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 262 | * NAND_BBT_PERCHIP option is set |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 264 | * Read the bad block table for all chips starting at a given page. We assume |
| 265 | * that the bbt bits are in consecutive order. |
| 266 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 267 | static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | { |
| 269 | struct nand_chip *this = mtd->priv; |
| 270 | int res = 0, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | if (td->options & NAND_BBT_PERCHIP) { |
| 273 | int offs = 0; |
| 274 | for (i = 0; i < this->numchips; i++) { |
| 275 | if (chip == -1 || chip == i) |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 276 | res = read_bbt(mtd, buf, td->pages[i], |
| 277 | this->chipsize >> this->bbt_erase_shift, |
| 278 | td, offs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | if (res) |
| 280 | return res; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 281 | offs += this->chipsize >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | } else { |
Sebastian Andrzej Siewior | df5b4e3 | 2010-09-29 19:43:51 +0200 | [diff] [blame] | 284 | res = read_bbt(mtd, buf, td->pages[0], |
| 285 | mtd->size >> this->bbt_erase_shift, td, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | if (res) |
| 287 | return res; |
| 288 | } |
| 289 | return 0; |
| 290 | } |
| 291 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 292 | /* BBT marker is in the first page, no OOB */ |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 293 | static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 294 | struct nand_bbt_descr *td) |
| 295 | { |
| 296 | size_t retlen; |
| 297 | size_t len; |
| 298 | |
| 299 | len = td->len; |
| 300 | if (td->options & NAND_BBT_VERSION) |
| 301 | len++; |
| 302 | |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 303 | return mtd_read(mtd, offs, len, &retlen, buf); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 304 | } |
| 305 | |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 306 | /** |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 307 | * scan_read_oob - [GENERIC] Scan data+OOB region to buffer |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 308 | * @mtd: MTD device structure |
| 309 | * @buf: temporary buffer |
| 310 | * @offs: offset at which to scan |
| 311 | * @len: length of data region to read |
| 312 | * |
| 313 | * Scan read data from data+OOB. May traverse multiple pages, interleaving |
| 314 | * page,OOB,page,OOB,... in buf. Completes transfer and returns the "strongest" |
| 315 | * ECC condition (error or bitflip). May quit on the first (non-ECC) error. |
| 316 | */ |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 317 | static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs, |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 318 | size_t len) |
| 319 | { |
| 320 | struct mtd_oob_ops ops; |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 321 | int res, ret = 0; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 322 | |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 323 | ops.mode = MTD_OPS_PLACE_OOB; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 324 | ops.ooboffs = 0; |
| 325 | ops.ooblen = mtd->oobsize; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 326 | |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 327 | while (len > 0) { |
Brian Norris | 105513c | 2011-09-07 13:13:28 -0700 | [diff] [blame] | 328 | ops.datbuf = buf; |
| 329 | ops.len = min(len, (size_t)mtd->writesize); |
| 330 | ops.oobbuf = buf + ops.len; |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 331 | |
Artem Bityutskiy | fd2819b | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 332 | res = mtd_read_oob(mtd, offs, &ops); |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 333 | if (res) { |
| 334 | if (!mtd_is_bitflip_or_eccerr(res)) |
| 335 | return res; |
| 336 | else if (mtd_is_eccerr(res) || !ret) |
| 337 | ret = res; |
| 338 | } |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 339 | |
| 340 | buf += mtd->oobsize + mtd->writesize; |
| 341 | len -= mtd->writesize; |
Dmitry Maluka | 34a5704 | 2012-05-11 20:51:51 +0300 | [diff] [blame] | 342 | offs += mtd->writesize; |
Maxim Levitsky | b64d39d | 2010-02-22 20:39:37 +0200 | [diff] [blame] | 343 | } |
Brian Norris | a7e6883 | 2012-06-22 16:35:45 -0700 | [diff] [blame] | 344 | return ret; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 345 | } |
| 346 | |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 347 | static int scan_read(struct mtd_info *mtd, uint8_t *buf, loff_t offs, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 348 | size_t len, struct nand_bbt_descr *td) |
| 349 | { |
| 350 | if (td->options & NAND_BBT_NO_OOB) |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 351 | return scan_read_data(mtd, buf, offs, td); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 352 | else |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 353 | return scan_read_oob(mtd, buf, offs, len); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 354 | } |
| 355 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 356 | /* Scan write data with oob to flash */ |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 357 | static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len, |
| 358 | uint8_t *buf, uint8_t *oob) |
| 359 | { |
| 360 | struct mtd_oob_ops ops; |
| 361 | |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 362 | ops.mode = MTD_OPS_PLACE_OOB; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 363 | ops.ooboffs = 0; |
| 364 | ops.ooblen = mtd->oobsize; |
| 365 | ops.datbuf = buf; |
| 366 | ops.oobbuf = oob; |
| 367 | ops.len = len; |
| 368 | |
Artem Bityutskiy | a2cc5ba | 2011-12-23 18:29:55 +0200 | [diff] [blame] | 369 | return mtd_write_oob(mtd, offs, &ops); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 370 | } |
| 371 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 372 | static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td) |
| 373 | { |
| 374 | u32 ver_offs = td->veroffs; |
| 375 | |
| 376 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 377 | ver_offs += mtd->writesize; |
| 378 | return ver_offs; |
| 379 | } |
| 380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | /** |
| 382 | * read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 383 | * @mtd: MTD device structure |
| 384 | * @buf: temporary buffer |
| 385 | * @td: descriptor for the bad block table |
| 386 | * @md: descriptor for the bad block table mirror |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 388 | * Read the bad block table(s) for all chips starting at a given page. We |
| 389 | * assume that the bbt bits are in consecutive order. |
| 390 | */ |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 391 | static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 392 | struct nand_bbt_descr *td, struct nand_bbt_descr *md) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | { |
| 394 | struct nand_chip *this = mtd->priv; |
| 395 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 396 | /* Read the primary version, if available */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | if (td->options & NAND_BBT_VERSION) { |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 398 | scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 399 | mtd->writesize, td); |
| 400 | td->version[0] = buf[bbt_get_ver_offs(mtd, td)]; |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 401 | pr_info("Bad block table at page %d, version 0x%02X\n", |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 402 | td->pages[0], td->version[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | } |
| 404 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 405 | /* Read the mirror version, if available */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | if (md && (md->options & NAND_BBT_VERSION)) { |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 407 | scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift, |
Shmulik Ladkani | 7bb9c75 | 2012-06-10 13:58:12 +0300 | [diff] [blame] | 408 | mtd->writesize, md); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 409 | md->version[0] = buf[bbt_get_ver_offs(mtd, md)]; |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 410 | pr_info("Bad block table at page %d, version 0x%02X\n", |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 411 | md->pages[0], md->version[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
| 414 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 415 | /* Scan a given block partially */ |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 416 | static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd, |
Shmulik Ladkani | eceb84b | 2012-08-20 16:29:15 +0300 | [diff] [blame] | 417 | loff_t offs, uint8_t *buf, int numpages) |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 418 | { |
| 419 | struct mtd_oob_ops ops; |
| 420 | int j, ret; |
| 421 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 422 | ops.ooblen = mtd->oobsize; |
| 423 | ops.oobbuf = buf; |
| 424 | ops.ooboffs = 0; |
| 425 | ops.datbuf = NULL; |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 426 | ops.mode = MTD_OPS_PLACE_OOB; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 427 | |
Shmulik Ladkani | eceb84b | 2012-08-20 16:29:15 +0300 | [diff] [blame] | 428 | for (j = 0; j < numpages; j++) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 429 | /* |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 430 | * Read the full oob until read_oob is fixed to handle single |
| 431 | * byte reads for 16 bit buswidth. |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 432 | */ |
Artem Bityutskiy | fd2819b | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 433 | ret = mtd_read_oob(mtd, offs, &ops); |
Brian Norris | 903cd06 | 2011-06-28 16:28:58 -0700 | [diff] [blame] | 434 | /* Ignore ECC errors when checking for BBM */ |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 435 | if (ret && !mtd_is_bitflip_or_eccerr(ret)) |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 436 | return ret; |
| 437 | |
| 438 | if (check_short_pattern(buf, bd)) |
| 439 | return 1; |
| 440 | |
| 441 | offs += mtd->writesize; |
| 442 | } |
| 443 | return 0; |
| 444 | } |
| 445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | /** |
| 447 | * create_bbt - [GENERIC] Create a bad block table by scanning the device |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 448 | * @mtd: MTD device structure |
| 449 | * @buf: temporary buffer |
| 450 | * @bd: descriptor for the good/bad block search pattern |
| 451 | * @chip: create the table for a specific chip, -1 read all chips; applies only |
| 452 | * if NAND_BBT_PERCHIP option is set |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 454 | * Create a bad block table by scanning the device for the given good/bad block |
| 455 | * identify pattern. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | */ |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 457 | static int create_bbt(struct mtd_info *mtd, uint8_t *buf, |
| 458 | struct nand_bbt_descr *bd, int chip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | { |
| 460 | struct nand_chip *this = mtd->priv; |
Brian Norris | 5961ad2 | 2013-10-30 00:41:30 -0400 | [diff] [blame] | 461 | int i, numblocks, numpages; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | int startblock; |
| 463 | loff_t from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 465 | pr_info("Scanning device for bad blocks\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | |
Brian Norris | 5961ad2 | 2013-10-30 00:41:30 -0400 | [diff] [blame] | 467 | if (bd->options & NAND_BBT_SCAN2NDPAGE) |
Shmulik Ladkani | eceb84b | 2012-08-20 16:29:15 +0300 | [diff] [blame] | 468 | numpages = 2; |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 469 | else |
Shmulik Ladkani | eceb84b | 2012-08-20 16:29:15 +0300 | [diff] [blame] | 470 | numpages = 1; |
Artem B. Bityuckiy | 171650a | 2005-02-16 17:09:39 +0000 | [diff] [blame] | 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | if (chip == -1) { |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 473 | numblocks = mtd->size >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | startblock = 0; |
| 475 | from = 0; |
| 476 | } else { |
| 477 | if (chip >= this->numchips) { |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 478 | pr_warn("create_bbt(): chipnr (%d) > available chips (%d)\n", |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 479 | chip + 1, this->numchips); |
Artem B. Bityuckiy | 171650a | 2005-02-16 17:09:39 +0000 | [diff] [blame] | 480 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 482 | numblocks = this->chipsize >> this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | startblock = chip * numblocks; |
| 484 | numblocks += startblock; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 485 | from = (loff_t)startblock << this->bbt_erase_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 487 | |
Brian Norris | 5fb1549 | 2011-05-31 16:31:21 -0700 | [diff] [blame] | 488 | if (this->bbt_options & NAND_BBT_SCANLASTPAGE) |
Shmulik Ladkani | eceb84b | 2012-08-20 16:29:15 +0300 | [diff] [blame] | 489 | from += mtd->erasesize - (mtd->writesize * numpages); |
Kevin Cernekee | b60b08b | 2010-05-04 20:58:10 -0700 | [diff] [blame] | 490 | |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 491 | for (i = startblock; i < numblocks; i++) { |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 492 | int ret; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 493 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 494 | BUG_ON(bd->options & NAND_BBT_NO_OOB); |
| 495 | |
Brian Norris | 5961ad2 | 2013-10-30 00:41:30 -0400 | [diff] [blame] | 496 | ret = scan_block_fast(mtd, bd, from, buf, numpages); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 497 | if (ret < 0) |
| 498 | return ret; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 499 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 500 | if (ret) { |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 501 | bbt_mark_entry(this, i, BBT_BLOCK_FACTORY_BAD); |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 502 | pr_warn("Bad eraseblock %d at 0x%012llx\n", |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 503 | i, (unsigned long long)from); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 504 | mtd->ecc_stats.badblocks++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | from += (1 << this->bbt_erase_shift); |
| 508 | } |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 509 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | |
| 512 | /** |
| 513 | * search_bbt - [GENERIC] scan the device for a specific bad block table |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 514 | * @mtd: MTD device structure |
| 515 | * @buf: temporary buffer |
| 516 | * @td: descriptor for the bad block table |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 518 | * Read the bad block table by searching for a given ident pattern. Search is |
| 519 | * preformed either from the beginning up or from the end of the device |
| 520 | * downwards. The search starts always at the start of a block. If the option |
| 521 | * NAND_BBT_PERCHIP is given, each chip is searched for a bbt, which contains |
| 522 | * the bad block information of this chip. This is necessary to provide support |
| 523 | * for certain DOC devices. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 525 | * The bbt ident pattern resides in the oob area of the first page in a block. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 527 | static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { |
| 529 | struct nand_chip *this = mtd->priv; |
| 530 | int i, chips; |
| 531 | int bits, startblock, block, dir; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 532 | int scanlen = mtd->writesize + mtd->oobsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | int bbtblocks; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 534 | int blocktopage = this->bbt_erase_shift - this->page_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 536 | /* Search direction top -> down? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | if (td->options & NAND_BBT_LASTBLOCK) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 538 | startblock = (mtd->size >> this->bbt_erase_shift) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | dir = -1; |
| 540 | } else { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 541 | startblock = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | dir = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 543 | } |
| 544 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 545 | /* Do we have a bbt per chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | if (td->options & NAND_BBT_PERCHIP) { |
| 547 | chips = this->numchips; |
| 548 | bbtblocks = this->chipsize >> this->bbt_erase_shift; |
| 549 | startblock &= bbtblocks - 1; |
| 550 | } else { |
| 551 | chips = 1; |
| 552 | bbtblocks = mtd->size >> this->bbt_erase_shift; |
| 553 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | /* Number of bits for each erase block in the bbt */ |
| 556 | bits = td->options & NAND_BBT_NRBITS_MSK; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | for (i = 0; i < chips; i++) { |
| 559 | /* Reset version information */ |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 560 | td->version[i] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | td->pages[i] = -1; |
| 562 | /* Scan the maximum number of blocks */ |
| 563 | for (block = 0; block < td->maxblocks; block++) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | int actblock = startblock + dir * block; |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 566 | loff_t offs = (loff_t)actblock << this->bbt_erase_shift; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | /* Read first page */ |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 569 | scan_read(mtd, buf, offs, mtd->writesize, td); |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 570 | if (!check_pattern(buf, scanlen, mtd->writesize, td)) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 571 | td->pages[i] = actblock << blocktopage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | if (td->options & NAND_BBT_VERSION) { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 573 | offs = bbt_get_ver_offs(mtd, td); |
| 574 | td->version[i] = buf[offs]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
| 576 | break; |
| 577 | } |
| 578 | } |
| 579 | startblock += this->chipsize >> this->bbt_erase_shift; |
| 580 | } |
| 581 | /* Check, if we found a bbt for each requested chip */ |
| 582 | for (i = 0; i < chips; i++) { |
| 583 | if (td->pages[i] == -1) |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 584 | pr_warn("Bad block table not found for chip %d\n", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | else |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 586 | pr_info("Bad block table found at page %d, version " |
| 587 | "0x%02X\n", td->pages[i], td->version[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 589 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | /** |
| 593 | * search_read_bbts - [GENERIC] scan the device for bad block table(s) |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 594 | * @mtd: MTD device structure |
| 595 | * @buf: temporary buffer |
| 596 | * @td: descriptor for the bad block table |
| 597 | * @md: descriptor for the bad block table mirror |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 599 | * Search and read the bad block table(s). |
| 600 | */ |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 601 | static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 602 | struct nand_bbt_descr *td, |
| 603 | struct nand_bbt_descr *md) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | { |
| 605 | /* Search the primary table */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 606 | search_bbt(mtd, buf, td); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 607 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | /* Search the mirror table */ |
| 609 | if (md) |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 610 | search_bbt(mtd, buf, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 611 | } |
| 612 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 613 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | * write_bbt - [GENERIC] (Re)write the bad block table |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 615 | * @mtd: MTD device structure |
| 616 | * @buf: temporary buffer |
| 617 | * @td: descriptor for the bad block table |
| 618 | * @md: descriptor for the bad block table mirror |
| 619 | * @chipsel: selector for a specific chip, -1 for all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 621 | * (Re)write the bad block table. |
| 622 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 623 | static int write_bbt(struct mtd_info *mtd, uint8_t *buf, |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 624 | struct nand_bbt_descr *td, struct nand_bbt_descr *md, |
| 625 | int chipsel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | { |
| 627 | struct nand_chip *this = mtd->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | struct erase_info einfo; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 629 | int i, res, chip = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | int bits, startblock, dir, page, offs, numblocks, sft, sftmsk; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 631 | int nrchips, pageoffs, ooboffs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | uint8_t msk[4]; |
| 633 | uint8_t rcode = td->reserved_block_code; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 634 | size_t retlen, len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | loff_t to; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 636 | struct mtd_oob_ops ops; |
| 637 | |
| 638 | ops.ooblen = mtd->oobsize; |
| 639 | ops.ooboffs = 0; |
| 640 | ops.datbuf = NULL; |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 641 | ops.mode = MTD_OPS_PLACE_OOB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
| 643 | if (!rcode) |
| 644 | rcode = 0xff; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 645 | /* Write bad block table per chip rather than per device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | if (td->options & NAND_BBT_PERCHIP) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 647 | numblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 648 | /* Full device write or specific chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | if (chipsel == -1) { |
| 650 | nrchips = this->numchips; |
| 651 | } else { |
| 652 | nrchips = chipsel + 1; |
| 653 | chip = chipsel; |
| 654 | } |
| 655 | } else { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 656 | numblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | nrchips = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 658 | } |
| 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | /* Loop through the chips */ |
| 661 | for (; chip < nrchips; chip++) { |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 662 | /* |
| 663 | * There was already a version of the table, reuse the page |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 664 | * This applies for absolute placement too, as we have the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | * page nr. in td->pages. |
| 666 | */ |
| 667 | if (td->pages[chip] != -1) { |
| 668 | page = td->pages[chip]; |
| 669 | goto write; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 670 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 672 | /* |
| 673 | * Automatic placement of the bad block table. Search direction |
| 674 | * top -> down? |
| 675 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | if (td->options & NAND_BBT_LASTBLOCK) { |
| 677 | startblock = numblocks * (chip + 1) - 1; |
| 678 | dir = -1; |
| 679 | } else { |
| 680 | startblock = chip * numblocks; |
| 681 | dir = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 682 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | |
| 684 | for (i = 0; i < td->maxblocks; i++) { |
| 685 | int block = startblock + dir * i; |
| 686 | /* Check, if the block is bad */ |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 687 | switch (bbt_get_entry(this, block)) { |
| 688 | case BBT_BLOCK_WORN: |
| 689 | case BBT_BLOCK_FACTORY_BAD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | continue; |
| 691 | } |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 692 | page = block << |
| 693 | (this->bbt_erase_shift - this->page_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | /* Check, if the block is used by the mirror table */ |
| 695 | if (!md || md->pages[chip] != page) |
| 696 | goto write; |
| 697 | } |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 698 | pr_err("No space left to write bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | return -ENOSPC; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 700 | write: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
| 702 | /* Set up shift count and masks for the flash table */ |
| 703 | bits = td->options & NAND_BBT_NRBITS_MSK; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 704 | msk[2] = ~rcode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | switch (bits) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 706 | case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; |
| 707 | msk[3] = 0x01; |
| 708 | break; |
| 709 | case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; |
| 710 | msk[3] = 0x03; |
| 711 | break; |
| 712 | case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; |
| 713 | msk[3] = 0x0f; |
| 714 | break; |
| 715 | case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; |
| 716 | msk[3] = 0xff; |
| 717 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | default: return -EINVAL; |
| 719 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 720 | |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 721 | to = ((loff_t)page) << this->page_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 723 | /* Must we save the block contents? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | if (td->options & NAND_BBT_SAVECONTENT) { |
| 725 | /* Make it block aligned */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 726 | to &= ~((loff_t)((1 << this->bbt_erase_shift) - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | len = 1 << this->bbt_erase_shift; |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 728 | res = mtd_read(mtd, to, len, &retlen, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | if (res < 0) { |
| 730 | if (retlen != len) { |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 731 | pr_info("nand_bbt: error reading block " |
| 732 | "for writing the bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | return res; |
| 734 | } |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 735 | pr_warn("nand_bbt: ECC error while reading " |
| 736 | "block for writing bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | } |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 738 | /* Read oob data */ |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 739 | ops.ooblen = (len >> this->page_shift) * mtd->oobsize; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 740 | ops.oobbuf = &buf[len]; |
Artem Bityutskiy | fd2819b | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 741 | res = mtd_read_oob(mtd, to + mtd->writesize, &ops); |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 742 | if (res < 0 || ops.oobretlen != ops.ooblen) |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 743 | goto outerr; |
| 744 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | /* Calc the byte offset in the buffer */ |
| 746 | pageoffs = page - (int)(to >> this->page_shift); |
| 747 | offs = pageoffs << this->page_shift; |
| 748 | /* Preset the bbt area with 0xff */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 749 | memset(&buf[offs], 0xff, (size_t)(numblocks >> sft)); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 750 | ooboffs = len + (pageoffs * mtd->oobsize); |
| 751 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 752 | } else if (td->options & NAND_BBT_NO_OOB) { |
| 753 | ooboffs = 0; |
| 754 | offs = td->len; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 755 | /* The version byte */ |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 756 | if (td->options & NAND_BBT_VERSION) |
| 757 | offs++; |
| 758 | /* Calc length */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 759 | len = (size_t)(numblocks >> sft); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 760 | len += offs; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 761 | /* Make it page aligned! */ |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 762 | len = ALIGN(len, mtd->writesize); |
| 763 | /* Preset the buffer with 0xff */ |
| 764 | memset(buf, 0xff, len); |
| 765 | /* Pattern is located at the begin of first page */ |
| 766 | memcpy(buf, td->pattern, td->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | } else { |
| 768 | /* Calc length */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 769 | len = (size_t)(numblocks >> sft); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 770 | /* Make it page aligned! */ |
Sebastian Andrzej Siewior | cda3209 | 2010-09-29 19:43:50 +0200 | [diff] [blame] | 771 | len = ALIGN(len, mtd->writesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | /* Preset the buffer with 0xff */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 773 | memset(buf, 0xff, len + |
| 774 | (len >> this->page_shift)* mtd->oobsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | offs = 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 776 | ooboffs = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | /* Pattern is located in oob area of first page */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 778 | memcpy(&buf[ooboffs + td->offs], td->pattern, td->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 780 | |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 781 | if (td->options & NAND_BBT_VERSION) |
| 782 | buf[ooboffs + td->veroffs] = td->version[chip]; |
| 783 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 784 | /* Walk through the memory table */ |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 785 | for (i = 0; i < numblocks; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | uint8_t dat; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 787 | int sftcnt = (i << (3 - sft)) & sftmsk; |
| 788 | dat = bbt_get_entry(this, chip * numblocks + i); |
| 789 | /* Do not store the reserved bbt blocks! */ |
| 790 | buf[offs + (i >> sft)] &= ~(msk[dat] << sftcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 792 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 793 | memset(&einfo, 0, sizeof(einfo)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | einfo.mtd = mtd; |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 795 | einfo.addr = to; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | einfo.len = 1 << this->bbt_erase_shift; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 797 | res = nand_erase_nand(mtd, &einfo, 1); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 798 | if (res < 0) |
| 799 | goto outerr; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 800 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 801 | res = scan_write_bbt(mtd, to, len, buf, |
| 802 | td->options & NAND_BBT_NO_OOB ? NULL : |
| 803 | &buf[len]); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 804 | if (res < 0) |
| 805 | goto outerr; |
| 806 | |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 807 | pr_info("Bad block table written to 0x%012llx, version 0x%02X\n", |
| 808 | (unsigned long long)to, td->version[chip]); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | /* Mark it as used */ |
| 811 | td->pages[chip] = page; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 812 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | return 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 814 | |
| 815 | outerr: |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 816 | pr_warn("nand_bbt: error while writing bad block table %d\n", res); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 817 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | } |
| 819 | |
| 820 | /** |
| 821 | * nand_memory_bbt - [GENERIC] create a memory based bad block table |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 822 | * @mtd: MTD device structure |
| 823 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 825 | * The function creates a memory based bbt by scanning the device for |
| 826 | * manufacturer / software marked good / bad blocks. |
| 827 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 828 | static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | { |
| 830 | struct nand_chip *this = mtd->priv; |
| 831 | |
David Woodhouse | 4bf63fc | 2006-09-25 17:08:04 +0100 | [diff] [blame] | 832 | return create_bbt(mtd, this->buffers->databuf, bd, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | /** |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 836 | * check_create - [GENERIC] create and write bbt(s) if necessary |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 837 | * @mtd: MTD device structure |
| 838 | * @buf: temporary buffer |
| 839 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 841 | * The function checks the results of the previous call to read_bbt and creates |
| 842 | * / updates the bbt(s) if necessary. Creation is necessary if no bbt was found |
| 843 | * for the chip/device. Update is necessary if one of the tables is missing or |
| 844 | * the version nr. of one table is less than the other. |
| 845 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 846 | static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | { |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 848 | int i, chips, writeops, create, chipsel, res, res2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | struct nand_chip *this = mtd->priv; |
| 850 | struct nand_bbt_descr *td = this->bbt_td; |
| 851 | struct nand_bbt_descr *md = this->bbt_md; |
| 852 | struct nand_bbt_descr *rd, *rd2; |
| 853 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 854 | /* Do we have a bbt per chip? */ |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 855 | if (td->options & NAND_BBT_PERCHIP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | chips = this->numchips; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 857 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | chips = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | for (i = 0; i < chips; i++) { |
| 861 | writeops = 0; |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 862 | create = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | rd = NULL; |
| 864 | rd2 = NULL; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 865 | res = res2 = 0; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 866 | /* Per chip or per device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 868 | /* Mirrored table available? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | if (md) { |
| 870 | if (td->pages[i] == -1 && md->pages[i] == -1) { |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 871 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | writeops = 0x03; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 873 | } else if (td->pages[i] == -1) { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 874 | rd = md; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 875 | writeops = 0x01; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 876 | } else if (md->pages[i] == -1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | rd = td; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 878 | writeops = 0x02; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 879 | } else if (td->version[i] == md->version[i]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | rd = td; |
| 881 | if (!(td->options & NAND_BBT_VERSION)) |
| 882 | rd2 = md; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 883 | } else if (((int8_t)(td->version[i] - md->version[i])) > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | rd = td; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 885 | writeops = 0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | } else { |
| 887 | rd = md; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 888 | writeops = 0x01; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } else { |
| 891 | if (td->pages[i] == -1) { |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 892 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | writeops = 0x01; |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 894 | } else { |
| 895 | rd = td; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 898 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 899 | if (create) { |
| 900 | /* Create the bad block table by scanning the device? */ |
| 901 | if (!(td->options & NAND_BBT_CREATE)) |
| 902 | continue; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 903 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 904 | /* Create the table in memory by scanning the chip(s) */ |
| 905 | if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY)) |
| 906 | create_bbt(mtd, buf, bd, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 908 | td->version[i] = 1; |
| 909 | if (md) |
| 910 | md->version[i] = 1; |
| 911 | } |
| 912 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 913 | /* Read back first? */ |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 914 | if (rd) { |
| 915 | res = read_abs_bbt(mtd, buf, rd, chipsel); |
| 916 | if (mtd_is_eccerr(res)) { |
| 917 | /* Mark table as invalid */ |
| 918 | rd->pages[i] = -1; |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 919 | rd->version[i] = 0; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 920 | i--; |
| 921 | continue; |
| 922 | } |
| 923 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 924 | /* If they weren't versioned, read both */ |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 925 | if (rd2) { |
| 926 | res2 = read_abs_bbt(mtd, buf, rd2, chipsel); |
| 927 | if (mtd_is_eccerr(res2)) { |
| 928 | /* Mark table as invalid */ |
| 929 | rd2->pages[i] = -1; |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 930 | rd2->version[i] = 0; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 931 | i--; |
| 932 | continue; |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | /* Scrub the flash table(s)? */ |
| 937 | if (mtd_is_bitflip(res) || mtd_is_bitflip(res2)) |
| 938 | writeops = 0x03; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 940 | /* Update version numbers before writing */ |
| 941 | if (md) { |
| 942 | td->version[i] = max(td->version[i], md->version[i]); |
| 943 | md->version[i] = td->version[i]; |
| 944 | } |
| 945 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 946 | /* Write the bad block table to the device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 948 | res = write_bbt(mtd, buf, td, md, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | if (res < 0) |
| 950 | return res; |
| 951 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 952 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 953 | /* Write the mirror bad block table to the device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 955 | res = write_bbt(mtd, buf, md, td, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | if (res < 0) |
| 957 | return res; |
| 958 | } |
| 959 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 960 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 964 | * mark_bbt_regions - [GENERIC] mark the bad block table regions |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 965 | * @mtd: MTD device structure |
| 966 | * @td: bad block table descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 968 | * The bad block table regions are marked as "bad" to prevent accidental |
| 969 | * erasures / writes. The regions are identified by the mark 0x02. |
| 970 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 971 | static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | { |
| 973 | struct nand_chip *this = mtd->priv; |
| 974 | int i, j, chips, block, nrblocks, update; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 975 | uint8_t oldval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 977 | /* Do we have a bbt per chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | if (td->options & NAND_BBT_PERCHIP) { |
| 979 | chips = this->numchips; |
| 980 | nrblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
| 981 | } else { |
| 982 | chips = 1; |
| 983 | nrblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 984 | } |
| 985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | for (i = 0; i < chips; i++) { |
| 987 | if ((td->options & NAND_BBT_ABSPAGE) || |
| 988 | !(td->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 989 | if (td->pages[i] == -1) |
| 990 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift); |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 992 | oldval = bbt_get_entry(this, block); |
| 993 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 994 | if ((oldval != BBT_BLOCK_RESERVED) && |
| 995 | td->reserved_block_code) |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 996 | nand_update_bbt(mtd, (loff_t)block << |
| 997 | this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | continue; |
| 999 | } |
| 1000 | update = 0; |
| 1001 | if (td->options & NAND_BBT_LASTBLOCK) |
| 1002 | block = ((i + 1) * nrblocks) - td->maxblocks; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1003 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | block = i * nrblocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | for (j = 0; j < td->maxblocks; j++) { |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1006 | oldval = bbt_get_entry(this, block); |
| 1007 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1008 | if (oldval != BBT_BLOCK_RESERVED) |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1009 | update = 1; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1010 | block++; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1011 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1012 | /* |
| 1013 | * If we want reserved blocks to be recorded to flash, and some |
| 1014 | * new ones have been marked, then we need to update the stored |
| 1015 | * bbts. This should only happen once. |
| 1016 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | if (update && td->reserved_block_code) |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1018 | nand_update_bbt(mtd, (loff_t)(block - 1) << |
| 1019 | this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | } |
| 1022 | |
| 1023 | /** |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1024 | * verify_bbt_descr - verify the bad block description |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1025 | * @mtd: MTD device structure |
| 1026 | * @bd: the table to verify |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1027 | * |
| 1028 | * This functions performs a few sanity checks on the bad block description |
| 1029 | * table. |
| 1030 | */ |
| 1031 | static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
| 1032 | { |
| 1033 | struct nand_chip *this = mtd->priv; |
Stanislav Fomichev | 7912a5e | 2011-02-07 23:48:25 +0300 | [diff] [blame] | 1034 | u32 pattern_len; |
| 1035 | u32 bits; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1036 | u32 table_size; |
| 1037 | |
| 1038 | if (!bd) |
| 1039 | return; |
Stanislav Fomichev | 7912a5e | 2011-02-07 23:48:25 +0300 | [diff] [blame] | 1040 | |
| 1041 | pattern_len = bd->len; |
| 1042 | bits = bd->options & NAND_BBT_NRBITS_MSK; |
| 1043 | |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1044 | BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) && |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1045 | !(this->bbt_options & NAND_BBT_USE_FLASH)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1046 | BUG_ON(!bits); |
| 1047 | |
| 1048 | if (bd->options & NAND_BBT_VERSION) |
| 1049 | pattern_len++; |
| 1050 | |
| 1051 | if (bd->options & NAND_BBT_NO_OOB) { |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1052 | BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH)); |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1053 | BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1054 | BUG_ON(bd->offs); |
| 1055 | if (bd->options & NAND_BBT_VERSION) |
| 1056 | BUG_ON(bd->veroffs != bd->len); |
| 1057 | BUG_ON(bd->options & NAND_BBT_SAVECONTENT); |
| 1058 | } |
| 1059 | |
| 1060 | if (bd->options & NAND_BBT_PERCHIP) |
| 1061 | table_size = this->chipsize >> this->bbt_erase_shift; |
| 1062 | else |
| 1063 | table_size = mtd->size >> this->bbt_erase_shift; |
| 1064 | table_size >>= 3; |
| 1065 | table_size *= bits; |
| 1066 | if (bd->options & NAND_BBT_NO_OOB) |
| 1067 | table_size += pattern_len; |
| 1068 | BUG_ON(table_size > (1 << this->bbt_erase_shift)); |
| 1069 | } |
| 1070 | |
| 1071 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | * nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s) |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1073 | * @mtd: MTD device structure |
| 1074 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1076 | * The function checks, if a bad block table(s) is/are already available. If |
| 1077 | * not it scans the device for manufacturer marked good / bad blocks and writes |
| 1078 | * the bad block table(s) to the selected place. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1080 | * The bad block table memory is allocated here. It must be freed by calling |
| 1081 | * the nand_free_bbt function. |
| 1082 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1083 | int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | { |
| 1085 | struct nand_chip *this = mtd->priv; |
| 1086 | int len, res = 0; |
| 1087 | uint8_t *buf; |
| 1088 | struct nand_bbt_descr *td = this->bbt_td; |
| 1089 | struct nand_bbt_descr *md = this->bbt_md; |
| 1090 | |
| 1091 | len = mtd->size >> (this->bbt_erase_shift + 2); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1092 | /* |
| 1093 | * Allocate memory (2bit per block) and clear the memory bad block |
| 1094 | * table. |
| 1095 | */ |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 1096 | this->bbt = kzalloc(len, GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1097 | if (!this->bbt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1100 | /* |
| 1101 | * If no primary table decriptor is given, scan the device to build a |
| 1102 | * memory based bad block table. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | */ |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 1104 | if (!td) { |
| 1105 | if ((res = nand_memory_bbt(mtd, bd))) { |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 1106 | pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n"); |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1107 | kfree(this->bbt); |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 1108 | this->bbt = NULL; |
| 1109 | } |
| 1110 | return res; |
| 1111 | } |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1112 | verify_bbt_descr(mtd, td); |
| 1113 | verify_bbt_descr(mtd, md); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
| 1115 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1116 | len = (1 << this->bbt_erase_shift); |
| 1117 | len += (len >> this->page_shift) * mtd->oobsize; |
David Woodhouse | c3f8abf | 2006-05-13 04:03:42 +0100 | [diff] [blame] | 1118 | buf = vmalloc(len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | if (!buf) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1120 | kfree(this->bbt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | this->bbt = NULL; |
| 1122 | return -ENOMEM; |
| 1123 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1124 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1125 | /* Is the bbt at a given page? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | if (td->options & NAND_BBT_ABSPAGE) { |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 1127 | read_abs_bbts(mtd, buf, td, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1128 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | /* Search the bad block table using a pattern in oob */ |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 1130 | search_read_bbts(mtd, buf, td, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1131 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 1133 | res = check_create(mtd, buf, bd); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | /* Prevent the bbt regions from erasing / writing */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1136 | mark_bbt_region(mtd, td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | if (md) |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1138 | mark_bbt_region(mtd, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1139 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1140 | vfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | return res; |
| 1142 | } |
| 1143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | /** |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1145 | * nand_update_bbt - update bad block table(s) |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1146 | * @mtd: MTD device structure |
| 1147 | * @offs: the offset of the newly marked block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1149 | * The function updates the bad block table(s). |
| 1150 | */ |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1151 | static int nand_update_bbt(struct mtd_info *mtd, loff_t offs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | { |
| 1153 | struct nand_chip *this = mtd->priv; |
Brian Norris | 1196ac5 | 2011-09-07 13:13:32 -0700 | [diff] [blame] | 1154 | int len, res = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | int chip, chipsel; |
| 1156 | uint8_t *buf; |
| 1157 | struct nand_bbt_descr *td = this->bbt_td; |
| 1158 | struct nand_bbt_descr *md = this->bbt_md; |
| 1159 | |
| 1160 | if (!this->bbt || !td) |
| 1161 | return -EINVAL; |
| 1162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1164 | len = (1 << this->bbt_erase_shift); |
| 1165 | len += (len >> this->page_shift) * mtd->oobsize; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1166 | buf = kmalloc(len, GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1167 | if (!buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | return -ENOMEM; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1169 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1170 | /* Do we have a bbt per chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | if (td->options & NAND_BBT_PERCHIP) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1172 | chip = (int)(offs >> this->chip_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | chipsel = chip; |
| 1174 | } else { |
| 1175 | chip = 0; |
| 1176 | chipsel = -1; |
| 1177 | } |
| 1178 | |
| 1179 | td->version[chip]++; |
| 1180 | if (md) |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1181 | md->version[chip]++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1183 | /* Write the bad block table to the device? */ |
Brian Norris | 1196ac5 | 2011-09-07 13:13:32 -0700 | [diff] [blame] | 1184 | if (td->options & NAND_BBT_WRITE) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1185 | res = write_bbt(mtd, buf, td, md, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | if (res < 0) |
| 1187 | goto out; |
| 1188 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1189 | /* Write the mirror bad block table to the device? */ |
Brian Norris | 1196ac5 | 2011-09-07 13:13:32 -0700 | [diff] [blame] | 1190 | if (md && (md->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1191 | res = write_bbt(mtd, buf, md, td, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | } |
| 1193 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1194 | out: |
| 1195 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | return res; |
| 1197 | } |
| 1198 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1199 | /* |
| 1200 | * Define some generic bad / good block scan pattern which are used |
| 1201 | * while scanning a device for factory marked good / bad blocks. |
| 1202 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; |
| 1204 | |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 1205 | /* Generic flash bbt descriptors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' }; |
| 1207 | static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' }; |
| 1208 | |
| 1209 | static struct nand_bbt_descr bbt_main_descr = { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1210 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1212 | .offs = 8, |
| 1213 | .len = 4, |
| 1214 | .veroffs = 12, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1215 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | .pattern = bbt_pattern |
| 1217 | }; |
| 1218 | |
| 1219 | static struct nand_bbt_descr bbt_mirror_descr = { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1220 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1222 | .offs = 8, |
| 1223 | .len = 4, |
| 1224 | .veroffs = 12, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1225 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | .pattern = mirror_pattern |
| 1227 | }; |
| 1228 | |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1229 | static struct nand_bbt_descr bbt_main_no_oob_descr = { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1230 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1231 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1232 | | NAND_BBT_NO_OOB, |
| 1233 | .len = 4, |
| 1234 | .veroffs = 4, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1235 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1236 | .pattern = bbt_pattern |
| 1237 | }; |
| 1238 | |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1239 | static struct nand_bbt_descr bbt_mirror_no_oob_descr = { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1240 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1241 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1242 | | NAND_BBT_NO_OOB, |
| 1243 | .len = 4, |
| 1244 | .veroffs = 4, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1245 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1246 | .pattern = mirror_pattern |
| 1247 | }; |
| 1248 | |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1249 | #define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1250 | /** |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1251 | * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1252 | * @this: NAND chip to create descriptor for |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1253 | * |
| 1254 | * This function allocates and initializes a nand_bbt_descr for BBM detection |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1255 | * based on the properties of @this. The new descriptor is stored in |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1256 | * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when |
| 1257 | * passed to this function. |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1258 | */ |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1259 | static int nand_create_badblock_pattern(struct nand_chip *this) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1260 | { |
| 1261 | struct nand_bbt_descr *bd; |
| 1262 | if (this->badblock_pattern) { |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1263 | pr_warn("Bad block pattern already allocated; not replacing\n"); |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1264 | return -EINVAL; |
| 1265 | } |
| 1266 | bd = kzalloc(sizeof(*bd), GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1267 | if (!bd) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1268 | return -ENOMEM; |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1269 | bd->options = this->bbt_options & BADBLOCK_SCAN_MASK; |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1270 | bd->offs = this->badblockpos; |
| 1271 | bd->len = (this->options & NAND_BUSWIDTH_16) ? 2 : 1; |
| 1272 | bd->pattern = scan_ff_pattern; |
| 1273 | bd->options |= NAND_BBT_DYNAMICSTRUCT; |
| 1274 | this->badblock_pattern = bd; |
| 1275 | return 0; |
| 1276 | } |
| 1277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1279 | * nand_default_bbt - [NAND Interface] Select a default bad block table for the device |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1280 | * @mtd: MTD device structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1282 | * This function selects the default bad block table support for the device and |
| 1283 | * calls the nand_scan_bbt function. |
| 1284 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1285 | int nand_default_bbt(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | { |
| 1287 | struct nand_chip *this = mtd->priv; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1288 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1289 | /* Is a flash based bad block table requested? */ |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1290 | if (this->bbt_options & NAND_BBT_USE_FLASH) { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1291 | /* Use the default pattern descriptors */ |
| 1292 | if (!this->bbt_td) { |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1293 | if (this->bbt_options & NAND_BBT_NO_OOB) { |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1294 | this->bbt_td = &bbt_main_no_oob_descr; |
| 1295 | this->bbt_md = &bbt_mirror_no_oob_descr; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1296 | } else { |
| 1297 | this->bbt_td = &bbt_main_descr; |
| 1298 | this->bbt_md = &bbt_mirror_descr; |
| 1299 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } else { |
| 1302 | this->bbt_td = NULL; |
| 1303 | this->bbt_md = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | } |
Brian Norris | a2f812d | 2011-03-18 21:53:42 -0700 | [diff] [blame] | 1305 | |
| 1306 | if (!this->badblock_pattern) |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1307 | nand_create_badblock_pattern(this); |
Brian Norris | a2f812d | 2011-03-18 21:53:42 -0700 | [diff] [blame] | 1308 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1309 | return nand_scan_bbt(mtd, this->badblock_pattern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | } |
| 1311 | |
| 1312 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1313 | * nand_isbad_bbt - [NAND Interface] Check if a block is bad |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1314 | * @mtd: MTD device structure |
| 1315 | * @offs: offset in the device |
| 1316 | * @allowbbt: allow access to bad block table region |
| 1317 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1318 | int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | { |
| 1320 | struct nand_chip *this = mtd->priv; |
Brian Norris | 39dbb02 | 2013-07-30 17:52:57 -0700 | [diff] [blame] | 1321 | int block, res; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1322 | |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1323 | block = (int)(offs >> this->bbt_erase_shift); |
| 1324 | res = bbt_get_entry(this, block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | |
Brian Norris | 289c052 | 2011-07-19 10:06:09 -0700 | [diff] [blame] | 1326 | pr_debug("nand_isbad_bbt(): bbt info for offs 0x%08x: " |
| 1327 | "(block %d) 0x%02x\n", |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1328 | (unsigned int)offs, block, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | |
Brian Norris | 39dbb02 | 2013-07-30 17:52:57 -0700 | [diff] [blame] | 1330 | switch (res) { |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1331 | case BBT_BLOCK_GOOD: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1332 | return 0; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1333 | case BBT_BLOCK_WORN: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1334 | return 1; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1335 | case BBT_BLOCK_RESERVED: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1336 | return allowbbt ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | } |
| 1338 | return 1; |
| 1339 | } |
| 1340 | |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1341 | /** |
| 1342 | * nand_markbad_bbt - [NAND Interface] Mark a block bad in the BBT |
| 1343 | * @mtd: MTD device structure |
| 1344 | * @offs: offset of the bad block |
| 1345 | */ |
| 1346 | int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs) |
| 1347 | { |
| 1348 | struct nand_chip *this = mtd->priv; |
| 1349 | int block, ret = 0; |
| 1350 | |
| 1351 | block = (int)(offs >> this->bbt_erase_shift); |
| 1352 | |
| 1353 | /* Mark bad block in memory */ |
| 1354 | bbt_mark_entry(this, block, BBT_BLOCK_WORN); |
| 1355 | |
| 1356 | /* Update flash-based bad block table */ |
| 1357 | if (this->bbt_options & NAND_BBT_USE_FLASH) |
| 1358 | ret = nand_update_bbt(mtd, offs); |
| 1359 | |
| 1360 | return ret; |
| 1361 | } |
| 1362 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1363 | EXPORT_SYMBOL(nand_scan_bbt); |