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Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 27 | * If one of the BBTs is out of date or does not exist it is (re)created.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)) { |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 204 | pr_info("nand_bbt: ECC error in BBT at 0x%012llx\n", |
| 205 | from & ~mtd->writesize); |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 206 | return res; |
| 207 | } else if (mtd_is_bitflip(res)) { |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 208 | pr_info("nand_bbt: corrected error in BBT at 0x%012llx\n", |
| 209 | from & ~mtd->writesize); |
Brian Norris | 167a8d5 | 2011-09-20 18:35:08 -0700 | [diff] [blame] | 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; |
Brian Norris | 930de53 | 2014-01-02 17:14:10 -0800 | [diff] [blame] | 531 | int 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 | for (i = 0; i < chips; i++) { |
| 556 | /* Reset version information */ |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 557 | td->version[i] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | td->pages[i] = -1; |
| 559 | /* Scan the maximum number of blocks */ |
| 560 | for (block = 0; block < td->maxblocks; block++) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | int actblock = startblock + dir * block; |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 563 | loff_t offs = (loff_t)actblock << this->bbt_erase_shift; |
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 | /* Read first page */ |
Brian Norris | af69dcd | 2012-06-22 16:35:42 -0700 | [diff] [blame] | 566 | scan_read(mtd, buf, offs, mtd->writesize, td); |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 567 | if (!check_pattern(buf, scanlen, mtd->writesize, td)) { |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 568 | td->pages[i] = actblock << blocktopage; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | if (td->options & NAND_BBT_VERSION) { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 570 | offs = bbt_get_ver_offs(mtd, td); |
| 571 | td->version[i] = buf[offs]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | } |
| 573 | break; |
| 574 | } |
| 575 | } |
| 576 | startblock += this->chipsize >> this->bbt_erase_shift; |
| 577 | } |
| 578 | /* Check, if we found a bbt for each requested chip */ |
| 579 | for (i = 0; i < chips; i++) { |
| 580 | if (td->pages[i] == -1) |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 581 | pr_warn("Bad block table not found for chip %d\n", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | else |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 583 | pr_info("Bad block table found at page %d, version 0x%02X\n", |
| 584 | td->pages[i], td->version[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 586 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | /** |
| 590 | * search_read_bbts - [GENERIC] scan the device for bad block table(s) |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 591 | * @mtd: MTD device structure |
| 592 | * @buf: temporary buffer |
| 593 | * @td: descriptor for the bad block table |
| 594 | * @md: descriptor for the bad block table mirror |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 596 | * Search and read the bad block table(s). |
| 597 | */ |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 598 | static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 599 | struct nand_bbt_descr *td, |
| 600 | struct nand_bbt_descr *md) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | { |
| 602 | /* Search the primary table */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 603 | search_bbt(mtd, buf, td); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | /* Search the mirror table */ |
| 606 | if (md) |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 607 | search_bbt(mtd, buf, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 608 | } |
| 609 | |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 610 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | * write_bbt - [GENERIC] (Re)write the bad block table |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 612 | * @mtd: MTD device structure |
| 613 | * @buf: temporary buffer |
| 614 | * @td: descriptor for the bad block table |
| 615 | * @md: descriptor for the bad block table mirror |
| 616 | * @chipsel: selector for a specific chip, -1 for all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 618 | * (Re)write the bad block table. |
| 619 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 620 | static int write_bbt(struct mtd_info *mtd, uint8_t *buf, |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 621 | struct nand_bbt_descr *td, struct nand_bbt_descr *md, |
| 622 | int chipsel) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | { |
| 624 | struct nand_chip *this = mtd->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | struct erase_info einfo; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 626 | int i, res, chip = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | int bits, startblock, dir, page, offs, numblocks, sft, sftmsk; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 628 | int nrchips, pageoffs, ooboffs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | uint8_t msk[4]; |
| 630 | uint8_t rcode = td->reserved_block_code; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 631 | size_t retlen, len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | loff_t to; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 633 | struct mtd_oob_ops ops; |
| 634 | |
| 635 | ops.ooblen = mtd->oobsize; |
| 636 | ops.ooboffs = 0; |
| 637 | ops.datbuf = NULL; |
Brian Norris | 0612b9d | 2011-08-30 18:45:40 -0700 | [diff] [blame] | 638 | ops.mode = MTD_OPS_PLACE_OOB; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
| 640 | if (!rcode) |
| 641 | rcode = 0xff; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 642 | /* Write bad block table per chip rather than per device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | if (td->options & NAND_BBT_PERCHIP) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 644 | numblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 645 | /* Full device write or specific chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | if (chipsel == -1) { |
| 647 | nrchips = this->numchips; |
| 648 | } else { |
| 649 | nrchips = chipsel + 1; |
| 650 | chip = chipsel; |
| 651 | } |
| 652 | } else { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 653 | numblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | nrchips = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 655 | } |
| 656 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | /* Loop through the chips */ |
| 658 | for (; chip < nrchips; chip++) { |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 659 | /* |
| 660 | * There was already a version of the table, reuse the page |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 661 | * This applies for absolute placement too, as we have the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | * page nr. in td->pages. |
| 663 | */ |
| 664 | if (td->pages[chip] != -1) { |
| 665 | page = td->pages[chip]; |
| 666 | goto write; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 667 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 669 | /* |
| 670 | * Automatic placement of the bad block table. Search direction |
| 671 | * top -> down? |
| 672 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | if (td->options & NAND_BBT_LASTBLOCK) { |
| 674 | startblock = numblocks * (chip + 1) - 1; |
| 675 | dir = -1; |
| 676 | } else { |
| 677 | startblock = chip * numblocks; |
| 678 | dir = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
| 681 | for (i = 0; i < td->maxblocks; i++) { |
| 682 | int block = startblock + dir * i; |
| 683 | /* Check, if the block is bad */ |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 684 | switch (bbt_get_entry(this, block)) { |
| 685 | case BBT_BLOCK_WORN: |
| 686 | case BBT_BLOCK_FACTORY_BAD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | continue; |
| 688 | } |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 689 | page = block << |
| 690 | (this->bbt_erase_shift - this->page_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | /* Check, if the block is used by the mirror table */ |
| 692 | if (!md || md->pages[chip] != page) |
| 693 | goto write; |
| 694 | } |
Brian Norris | 9a4d4d6 | 2011-07-19 10:06:07 -0700 | [diff] [blame] | 695 | pr_err("No space left to write bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | return -ENOSPC; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 697 | write: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | /* Set up shift count and masks for the flash table */ |
| 700 | bits = td->options & NAND_BBT_NRBITS_MSK; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 701 | msk[2] = ~rcode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | switch (bits) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 703 | case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; |
| 704 | msk[3] = 0x01; |
| 705 | break; |
| 706 | case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; |
| 707 | msk[3] = 0x03; |
| 708 | break; |
| 709 | case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; |
| 710 | msk[3] = 0x0f; |
| 711 | break; |
| 712 | case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; |
| 713 | msk[3] = 0xff; |
| 714 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | default: return -EINVAL; |
| 716 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 717 | |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 718 | to = ((loff_t)page) << this->page_shift; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 720 | /* Must we save the block contents? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | if (td->options & NAND_BBT_SAVECONTENT) { |
| 722 | /* Make it block aligned */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 723 | to &= ~((loff_t)((1 << this->bbt_erase_shift) - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | len = 1 << this->bbt_erase_shift; |
Artem Bityutskiy | 329ad39 | 2011-12-23 17:30:16 +0200 | [diff] [blame] | 725 | res = mtd_read(mtd, to, len, &retlen, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | if (res < 0) { |
| 727 | if (retlen != len) { |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 728 | pr_info("nand_bbt: error reading block for writing the bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | return res; |
| 730 | } |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 731 | pr_warn("nand_bbt: ECC error while reading block for writing bad block table\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 733 | /* Read oob data */ |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 734 | ops.ooblen = (len >> this->page_shift) * mtd->oobsize; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 735 | ops.oobbuf = &buf[len]; |
Artem Bityutskiy | fd2819b | 2011-12-23 18:27:05 +0200 | [diff] [blame] | 736 | res = mtd_read_oob(mtd, to + mtd->writesize, &ops); |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 737 | if (res < 0 || ops.oobretlen != ops.ooblen) |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 738 | goto outerr; |
| 739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | /* Calc the byte offset in the buffer */ |
| 741 | pageoffs = page - (int)(to >> this->page_shift); |
| 742 | offs = pageoffs << this->page_shift; |
| 743 | /* Preset the bbt area with 0xff */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 744 | memset(&buf[offs], 0xff, (size_t)(numblocks >> sft)); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 745 | ooboffs = len + (pageoffs * mtd->oobsize); |
| 746 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 747 | } else if (td->options & NAND_BBT_NO_OOB) { |
| 748 | ooboffs = 0; |
| 749 | offs = td->len; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 750 | /* The version byte */ |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 751 | if (td->options & NAND_BBT_VERSION) |
| 752 | offs++; |
| 753 | /* Calc length */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 754 | len = (size_t)(numblocks >> sft); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 755 | len += offs; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 756 | /* Make it page aligned! */ |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 757 | len = ALIGN(len, mtd->writesize); |
| 758 | /* Preset the buffer with 0xff */ |
| 759 | memset(buf, 0xff, len); |
| 760 | /* Pattern is located at the begin of first page */ |
| 761 | memcpy(buf, td->pattern, td->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | } else { |
| 763 | /* Calc length */ |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 764 | len = (size_t)(numblocks >> sft); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 765 | /* Make it page aligned! */ |
Sebastian Andrzej Siewior | cda3209 | 2010-09-29 19:43:50 +0200 | [diff] [blame] | 766 | len = ALIGN(len, mtd->writesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | /* Preset the buffer with 0xff */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 768 | memset(buf, 0xff, len + |
| 769 | (len >> this->page_shift)* mtd->oobsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | offs = 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 771 | ooboffs = len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | /* Pattern is located in oob area of first page */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 773 | memcpy(&buf[ooboffs + td->offs], td->pattern, td->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 775 | |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 776 | if (td->options & NAND_BBT_VERSION) |
| 777 | buf[ooboffs + td->veroffs] = td->version[chip]; |
| 778 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 779 | /* Walk through the memory table */ |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 780 | for (i = 0; i < numblocks; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | uint8_t dat; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 782 | int sftcnt = (i << (3 - sft)) & sftmsk; |
| 783 | dat = bbt_get_entry(this, chip * numblocks + i); |
| 784 | /* Do not store the reserved bbt blocks! */ |
| 785 | buf[offs + (i >> sft)] &= ~(msk[dat] << sftcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 787 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 788 | memset(&einfo, 0, sizeof(einfo)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | einfo.mtd = mtd; |
Adrian Hunter | 69423d9 | 2008-12-10 13:37:21 +0000 | [diff] [blame] | 790 | einfo.addr = to; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | einfo.len = 1 << this->bbt_erase_shift; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 792 | res = nand_erase_nand(mtd, &einfo, 1); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 793 | if (res < 0) |
| 794 | goto outerr; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 795 | |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 796 | res = scan_write_bbt(mtd, to, len, buf, |
| 797 | td->options & NAND_BBT_NO_OOB ? NULL : |
| 798 | &buf[len]); |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 799 | if (res < 0) |
| 800 | goto outerr; |
| 801 | |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 802 | pr_info("Bad block table written to 0x%012llx, version 0x%02X\n", |
| 803 | (unsigned long long)to, td->version[chip]); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | /* Mark it as used */ |
| 806 | td->pages[chip] = page; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 807 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | return 0; |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 809 | |
| 810 | outerr: |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 811 | 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] | 812 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | } |
| 814 | |
| 815 | /** |
| 816 | * nand_memory_bbt - [GENERIC] create a memory based bad block table |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 817 | * @mtd: MTD device structure |
| 818 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 820 | * The function creates a memory based bbt by scanning the device for |
| 821 | * manufacturer / software marked good / bad blocks. |
| 822 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 823 | 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] | 824 | { |
| 825 | struct nand_chip *this = mtd->priv; |
| 826 | |
David Woodhouse | 4bf63fc | 2006-09-25 17:08:04 +0100 | [diff] [blame] | 827 | return create_bbt(mtd, this->buffers->databuf, bd, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | /** |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 831 | * check_create - [GENERIC] create and write bbt(s) if necessary |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 832 | * @mtd: MTD device structure |
| 833 | * @buf: temporary buffer |
| 834 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 836 | * The function checks the results of the previous call to read_bbt and creates |
| 837 | * / updates the bbt(s) if necessary. Creation is necessary if no bbt was found |
| 838 | * for the chip/device. Update is necessary if one of the tables is missing or |
| 839 | * the version nr. of one table is less than the other. |
| 840 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 841 | 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] | 842 | { |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 843 | int i, chips, writeops, create, chipsel, res, res2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | struct nand_chip *this = mtd->priv; |
| 845 | struct nand_bbt_descr *td = this->bbt_td; |
| 846 | struct nand_bbt_descr *md = this->bbt_md; |
| 847 | struct nand_bbt_descr *rd, *rd2; |
| 848 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 849 | /* Do we have a bbt per chip? */ |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 850 | if (td->options & NAND_BBT_PERCHIP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | chips = this->numchips; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 852 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | chips = 1; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 854 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | for (i = 0; i < chips; i++) { |
| 856 | writeops = 0; |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 857 | create = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | rd = NULL; |
| 859 | rd2 = NULL; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 860 | res = res2 = 0; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 861 | /* Per chip or per device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1; |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 863 | /* Mirrored table available? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | if (md) { |
| 865 | if (td->pages[i] == -1 && md->pages[i] == -1) { |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 866 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | writeops = 0x03; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 868 | } else if (td->pages[i] == -1) { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 869 | rd = md; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 870 | writeops = 0x01; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 871 | } else if (md->pages[i] == -1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | rd = td; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 873 | writeops = 0x02; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 874 | } else if (td->version[i] == md->version[i]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | rd = td; |
| 876 | if (!(td->options & NAND_BBT_VERSION)) |
| 877 | rd2 = md; |
Brian Norris | c5e8ef9 | 2011-09-07 13:13:34 -0700 | [diff] [blame] | 878 | } else if (((int8_t)(td->version[i] - md->version[i])) > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | rd = td; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 880 | writeops = 0x02; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | } else { |
| 882 | rd = md; |
Brian Norris | 596d745 | 2011-09-07 13:13:33 -0700 | [diff] [blame] | 883 | writeops = 0x01; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | } else { |
| 886 | if (td->pages[i] == -1) { |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 887 | create = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | writeops = 0x01; |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 889 | } else { |
| 890 | rd = td; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 893 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 894 | if (create) { |
| 895 | /* Create the bad block table by scanning the device? */ |
| 896 | if (!(td->options & NAND_BBT_CREATE)) |
| 897 | continue; |
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 | /* Create the table in memory by scanning the chip(s) */ |
| 900 | if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY)) |
| 901 | create_bbt(mtd, buf, bd, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | |
Brian Norris | b61bf5b | 2011-09-07 13:13:35 -0700 | [diff] [blame] | 903 | td->version[i] = 1; |
| 904 | if (md) |
| 905 | md->version[i] = 1; |
| 906 | } |
| 907 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 908 | /* Read back first? */ |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 909 | if (rd) { |
| 910 | res = read_abs_bbt(mtd, buf, rd, chipsel); |
| 911 | if (mtd_is_eccerr(res)) { |
| 912 | /* Mark table as invalid */ |
| 913 | rd->pages[i] = -1; |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 914 | rd->version[i] = 0; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 915 | i--; |
| 916 | continue; |
| 917 | } |
| 918 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 919 | /* If they weren't versioned, read both */ |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 920 | if (rd2) { |
| 921 | res2 = read_abs_bbt(mtd, buf, rd2, chipsel); |
| 922 | if (mtd_is_eccerr(res2)) { |
| 923 | /* Mark table as invalid */ |
| 924 | rd2->pages[i] = -1; |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 925 | rd2->version[i] = 0; |
Brian Norris | 623978d | 2011-09-20 18:35:34 -0700 | [diff] [blame] | 926 | i--; |
| 927 | continue; |
| 928 | } |
| 929 | } |
| 930 | |
| 931 | /* Scrub the flash table(s)? */ |
| 932 | if (mtd_is_bitflip(res) || mtd_is_bitflip(res2)) |
| 933 | writeops = 0x03; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
Brian Norris | dadc17a | 2011-09-20 18:35:57 -0700 | [diff] [blame] | 935 | /* Update version numbers before writing */ |
| 936 | if (md) { |
| 937 | td->version[i] = max(td->version[i], md->version[i]); |
| 938 | md->version[i] = td->version[i]; |
| 939 | } |
| 940 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 941 | /* Write the bad block table to the device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 943 | res = write_bbt(mtd, buf, td, md, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | if (res < 0) |
| 945 | return res; |
| 946 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 947 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 948 | /* Write the mirror bad block table to the device? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 950 | res = write_bbt(mtd, buf, md, td, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | if (res < 0) |
| 952 | return res; |
| 953 | } |
| 954 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 955 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 959 | * mark_bbt_regions - [GENERIC] mark the bad block table regions |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 960 | * @mtd: MTD device structure |
| 961 | * @td: bad block table descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 963 | * The bad block table regions are marked as "bad" to prevent accidental |
| 964 | * erasures / writes. The regions are identified by the mark 0x02. |
| 965 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 966 | 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] | 967 | { |
| 968 | struct nand_chip *this = mtd->priv; |
| 969 | int i, j, chips, block, nrblocks, update; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 970 | uint8_t oldval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 972 | /* Do we have a bbt per chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | if (td->options & NAND_BBT_PERCHIP) { |
| 974 | chips = this->numchips; |
| 975 | nrblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
| 976 | } else { |
| 977 | chips = 1; |
| 978 | nrblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 979 | } |
| 980 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | for (i = 0; i < chips; i++) { |
| 982 | if ((td->options & NAND_BBT_ABSPAGE) || |
| 983 | !(td->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 984 | if (td->pages[i] == -1) |
| 985 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift); |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 987 | oldval = bbt_get_entry(this, block); |
| 988 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 989 | if ((oldval != BBT_BLOCK_RESERVED) && |
| 990 | td->reserved_block_code) |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 991 | nand_update_bbt(mtd, (loff_t)block << |
| 992 | this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | continue; |
| 994 | } |
| 995 | update = 0; |
| 996 | if (td->options & NAND_BBT_LASTBLOCK) |
| 997 | block = ((i + 1) * nrblocks) - td->maxblocks; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 998 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | block = i * nrblocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | for (j = 0; j < td->maxblocks; j++) { |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1001 | oldval = bbt_get_entry(this, block); |
| 1002 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1003 | if (oldval != BBT_BLOCK_RESERVED) |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1004 | update = 1; |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1005 | block++; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1006 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1007 | /* |
| 1008 | * If we want reserved blocks to be recorded to flash, and some |
| 1009 | * new ones have been marked, then we need to update the stored |
| 1010 | * bbts. This should only happen once. |
| 1011 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | if (update && td->reserved_block_code) |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1013 | nand_update_bbt(mtd, (loff_t)(block - 1) << |
| 1014 | this->bbt_erase_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | } |
| 1016 | } |
| 1017 | |
| 1018 | /** |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1019 | * verify_bbt_descr - verify the bad block description |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1020 | * @mtd: MTD device structure |
| 1021 | * @bd: the table to verify |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1022 | * |
| 1023 | * This functions performs a few sanity checks on the bad block description |
| 1024 | * table. |
| 1025 | */ |
| 1026 | static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
| 1027 | { |
| 1028 | struct nand_chip *this = mtd->priv; |
Stanislav Fomichev | 7912a5e | 2011-02-07 23:48:25 +0300 | [diff] [blame] | 1029 | u32 pattern_len; |
| 1030 | u32 bits; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1031 | u32 table_size; |
| 1032 | |
| 1033 | if (!bd) |
| 1034 | return; |
Stanislav Fomichev | 7912a5e | 2011-02-07 23:48:25 +0300 | [diff] [blame] | 1035 | |
| 1036 | pattern_len = bd->len; |
| 1037 | bits = bd->options & NAND_BBT_NRBITS_MSK; |
| 1038 | |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1039 | BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) && |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1040 | !(this->bbt_options & NAND_BBT_USE_FLASH)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1041 | BUG_ON(!bits); |
| 1042 | |
| 1043 | if (bd->options & NAND_BBT_VERSION) |
| 1044 | pattern_len++; |
| 1045 | |
| 1046 | if (bd->options & NAND_BBT_NO_OOB) { |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1047 | BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH)); |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1048 | BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB)); |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1049 | BUG_ON(bd->offs); |
| 1050 | if (bd->options & NAND_BBT_VERSION) |
| 1051 | BUG_ON(bd->veroffs != bd->len); |
| 1052 | BUG_ON(bd->options & NAND_BBT_SAVECONTENT); |
| 1053 | } |
| 1054 | |
| 1055 | if (bd->options & NAND_BBT_PERCHIP) |
| 1056 | table_size = this->chipsize >> this->bbt_erase_shift; |
| 1057 | else |
| 1058 | table_size = mtd->size >> this->bbt_erase_shift; |
| 1059 | table_size >>= 3; |
| 1060 | table_size *= bits; |
| 1061 | if (bd->options & NAND_BBT_NO_OOB) |
| 1062 | table_size += pattern_len; |
| 1063 | BUG_ON(table_size > (1 << this->bbt_erase_shift)); |
| 1064 | } |
| 1065 | |
| 1066 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | * 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] | 1068 | * @mtd: MTD device structure |
| 1069 | * @bd: descriptor for the good/bad block search pattern |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1071 | * The function checks, if a bad block table(s) is/are already available. If |
| 1072 | * not it scans the device for manufacturer marked good / bad blocks and writes |
| 1073 | * the bad block table(s) to the selected place. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1075 | * The bad block table memory is allocated here. It must be freed by calling |
| 1076 | * the nand_free_bbt function. |
| 1077 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1078 | 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] | 1079 | { |
| 1080 | struct nand_chip *this = mtd->priv; |
| 1081 | int len, res = 0; |
| 1082 | uint8_t *buf; |
| 1083 | struct nand_bbt_descr *td = this->bbt_td; |
| 1084 | struct nand_bbt_descr *md = this->bbt_md; |
| 1085 | |
| 1086 | len = mtd->size >> (this->bbt_erase_shift + 2); |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1087 | /* |
| 1088 | * Allocate memory (2bit per block) and clear the memory bad block |
| 1089 | * table. |
| 1090 | */ |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 1091 | this->bbt = kzalloc(len, GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1092 | if (!this->bbt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1095 | /* |
| 1096 | * If no primary table decriptor is given, scan the device to build a |
| 1097 | * memory based bad block table. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | */ |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 1099 | if (!td) { |
| 1100 | if ((res = nand_memory_bbt(mtd, bd))) { |
Brian Norris | d037021 | 2011-07-19 10:06:08 -0700 | [diff] [blame] | 1101 | 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] | 1102 | kfree(this->bbt); |
Artem B. Bityuckiy | eeada24 | 2005-02-11 10:14:15 +0000 | [diff] [blame] | 1103 | this->bbt = NULL; |
| 1104 | } |
| 1105 | return res; |
| 1106 | } |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1107 | verify_bbt_descr(mtd, td); |
| 1108 | verify_bbt_descr(mtd, md); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | |
| 1110 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1111 | len = (1 << this->bbt_erase_shift); |
| 1112 | len += (len >> this->page_shift) * mtd->oobsize; |
David Woodhouse | c3f8abf | 2006-05-13 04:03:42 +0100 | [diff] [blame] | 1113 | buf = vmalloc(len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | if (!buf) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1115 | kfree(this->bbt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | this->bbt = NULL; |
| 1117 | return -ENOMEM; |
| 1118 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1119 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1120 | /* Is the bbt at a given page? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | if (td->options & NAND_BBT_ABSPAGE) { |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 1122 | read_abs_bbts(mtd, buf, td, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1123 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | /* Search the bad block table using a pattern in oob */ |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 1125 | search_read_bbts(mtd, buf, td, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
Brian Norris | 7b5a2d4 | 2012-06-22 16:35:41 -0700 | [diff] [blame] | 1128 | res = check_create(mtd, buf, bd); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | /* Prevent the bbt regions from erasing / writing */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1131 | mark_bbt_region(mtd, td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | if (md) |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1133 | mark_bbt_region(mtd, md); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1134 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1135 | vfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | return res; |
| 1137 | } |
| 1138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | /** |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1140 | * nand_update_bbt - update bad block table(s) |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1141 | * @mtd: MTD device structure |
| 1142 | * @offs: the offset of the newly marked block |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1144 | * The function updates the bad block table(s). |
| 1145 | */ |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1146 | static int nand_update_bbt(struct mtd_info *mtd, loff_t offs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | { |
| 1148 | struct nand_chip *this = mtd->priv; |
Brian Norris | 1196ac5 | 2011-09-07 13:13:32 -0700 | [diff] [blame] | 1149 | int len, res = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | int chip, chipsel; |
| 1151 | uint8_t *buf; |
| 1152 | struct nand_bbt_descr *td = this->bbt_td; |
| 1153 | struct nand_bbt_descr *md = this->bbt_md; |
| 1154 | |
| 1155 | if (!this->bbt || !td) |
| 1156 | return -EINVAL; |
| 1157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1159 | len = (1 << this->bbt_erase_shift); |
| 1160 | len += (len >> this->page_shift) * mtd->oobsize; |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1161 | buf = kmalloc(len, GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1162 | if (!buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | return -ENOMEM; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1164 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1165 | /* Do we have a bbt per chip? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | if (td->options & NAND_BBT_PERCHIP) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1167 | chip = (int)(offs >> this->chip_shift); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | chipsel = chip; |
| 1169 | } else { |
| 1170 | chip = 0; |
| 1171 | chipsel = -1; |
| 1172 | } |
| 1173 | |
| 1174 | td->version[chip]++; |
| 1175 | if (md) |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1176 | md->version[chip]++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1178 | /* Write the bad block table to the device? */ |
Brian Norris | 1196ac5 | 2011-09-07 13:13:32 -0700 | [diff] [blame] | 1179 | if (td->options & NAND_BBT_WRITE) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1180 | res = write_bbt(mtd, buf, td, md, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | if (res < 0) |
| 1182 | goto out; |
| 1183 | } |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1184 | /* Write the mirror bad block table to the device? */ |
Brian Norris | 1196ac5 | 2011-09-07 13:13:32 -0700 | [diff] [blame] | 1185 | if (md && (md->options & NAND_BBT_WRITE)) { |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1186 | res = write_bbt(mtd, buf, md, td, chipsel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | } |
| 1188 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1189 | out: |
| 1190 | kfree(buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | return res; |
| 1192 | } |
| 1193 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1194 | /* |
| 1195 | * Define some generic bad / good block scan pattern which are used |
| 1196 | * while scanning a device for factory marked good / bad blocks. |
| 1197 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; |
| 1199 | |
Brian Norris | 7854d3f | 2011-06-23 14:12:08 -0700 | [diff] [blame] | 1200 | /* Generic flash bbt descriptors */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' }; |
| 1202 | static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' }; |
| 1203 | |
| 1204 | static struct nand_bbt_descr bbt_main_descr = { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1205 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1207 | .offs = 8, |
| 1208 | .len = 4, |
| 1209 | .veroffs = 12, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1210 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | .pattern = bbt_pattern |
| 1212 | }; |
| 1213 | |
| 1214 | static struct nand_bbt_descr bbt_mirror_descr = { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1215 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1217 | .offs = 8, |
| 1218 | .len = 4, |
| 1219 | .veroffs = 12, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1220 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | .pattern = mirror_pattern |
| 1222 | }; |
| 1223 | |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1224 | static struct nand_bbt_descr bbt_main_no_oob_descr = { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1225 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1226 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1227 | | NAND_BBT_NO_OOB, |
| 1228 | .len = 4, |
| 1229 | .veroffs = 4, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1230 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1231 | .pattern = bbt_pattern |
| 1232 | }; |
| 1233 | |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1234 | static struct nand_bbt_descr bbt_mirror_no_oob_descr = { |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1235 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1236 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1237 | | NAND_BBT_NO_OOB, |
| 1238 | .len = 4, |
| 1239 | .veroffs = 4, |
Richard Genoud | 61de9da | 2012-09-11 15:50:54 +0200 | [diff] [blame] | 1240 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1241 | .pattern = mirror_pattern |
| 1242 | }; |
| 1243 | |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1244 | #define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1245 | /** |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1246 | * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1247 | * @this: NAND chip to create descriptor for |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1248 | * |
| 1249 | * This function allocates and initializes a nand_bbt_descr for BBM detection |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1250 | * based on the properties of @this. The new descriptor is stored in |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1251 | * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when |
| 1252 | * passed to this function. |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1253 | */ |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1254 | static int nand_create_badblock_pattern(struct nand_chip *this) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1255 | { |
| 1256 | struct nand_bbt_descr *bd; |
| 1257 | if (this->badblock_pattern) { |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1258 | pr_warn("Bad block pattern already allocated; not replacing\n"); |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1259 | return -EINVAL; |
| 1260 | } |
| 1261 | bd = kzalloc(sizeof(*bd), GFP_KERNEL); |
Brian Norris | 0870066 | 2011-06-07 16:01:54 -0700 | [diff] [blame] | 1262 | if (!bd) |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1263 | return -ENOMEM; |
Brian Norris | 752ed6c | 2011-09-20 18:36:42 -0700 | [diff] [blame] | 1264 | bd->options = this->bbt_options & BADBLOCK_SCAN_MASK; |
Brian Norris | 58373ff | 2010-07-15 12:15:44 -0700 | [diff] [blame] | 1265 | bd->offs = this->badblockpos; |
| 1266 | bd->len = (this->options & NAND_BUSWIDTH_16) ? 2 : 1; |
| 1267 | bd->pattern = scan_ff_pattern; |
| 1268 | bd->options |= NAND_BBT_DYNAMICSTRUCT; |
| 1269 | this->badblock_pattern = bd; |
| 1270 | return 0; |
| 1271 | } |
| 1272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1274 | * 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] | 1275 | * @mtd: MTD device structure |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | * |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1277 | * This function selects the default bad block table support for the device and |
| 1278 | * calls the nand_scan_bbt function. |
| 1279 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1280 | int nand_default_bbt(struct mtd_info *mtd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | { |
| 1282 | struct nand_chip *this = mtd->priv; |
Brian Norris | abb9cf7 | 2014-05-20 22:34:40 -0700 | [diff] [blame] | 1283 | int ret; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1284 | |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1285 | /* Is a flash based bad block table requested? */ |
Brian Norris | bb9ebd4 | 2011-05-31 16:31:23 -0700 | [diff] [blame] | 1286 | if (this->bbt_options & NAND_BBT_USE_FLASH) { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1287 | /* Use the default pattern descriptors */ |
| 1288 | if (!this->bbt_td) { |
Brian Norris | a40f734 | 2011-05-31 16:31:22 -0700 | [diff] [blame] | 1289 | if (this->bbt_options & NAND_BBT_NO_OOB) { |
Brian Norris | 9fd6b37 | 2012-06-22 16:35:40 -0700 | [diff] [blame] | 1290 | this->bbt_td = &bbt_main_no_oob_descr; |
| 1291 | this->bbt_md = &bbt_mirror_no_oob_descr; |
Sebastian Andrzej Siewior | 7cba7b1 | 2010-09-30 21:28:01 +0200 | [diff] [blame] | 1292 | } else { |
| 1293 | this->bbt_td = &bbt_main_descr; |
| 1294 | this->bbt_md = &bbt_mirror_descr; |
| 1295 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | } else { |
| 1298 | this->bbt_td = NULL; |
| 1299 | this->bbt_md = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | } |
Brian Norris | a2f812d | 2011-03-18 21:53:42 -0700 | [diff] [blame] | 1301 | |
Brian Norris | abb9cf7 | 2014-05-20 22:34:40 -0700 | [diff] [blame] | 1302 | if (!this->badblock_pattern) { |
| 1303 | ret = nand_create_badblock_pattern(this); |
| 1304 | if (ret) |
| 1305 | return ret; |
| 1306 | } |
Brian Norris | a2f812d | 2011-03-18 21:53:42 -0700 | [diff] [blame] | 1307 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1308 | return nand_scan_bbt(mtd, this->badblock_pattern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | } |
| 1310 | |
| 1311 | /** |
Ezequiel Garcia | 8471bb7 | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 1312 | * nand_isreserved_bbt - [NAND Interface] Check if a block is reserved |
| 1313 | * @mtd: MTD device structure |
| 1314 | * @offs: offset in the device |
| 1315 | */ |
| 1316 | int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs) |
| 1317 | { |
| 1318 | struct nand_chip *this = mtd->priv; |
| 1319 | int block; |
| 1320 | |
| 1321 | block = (int)(offs >> this->bbt_erase_shift); |
| 1322 | return bbt_get_entry(this, block) == BBT_BLOCK_RESERVED; |
| 1323 | } |
| 1324 | |
| 1325 | /** |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1326 | * nand_isbad_bbt - [NAND Interface] Check if a block is bad |
Brian Norris | 8b6e50c | 2011-05-25 14:59:01 -0700 | [diff] [blame] | 1327 | * @mtd: MTD device structure |
| 1328 | * @offs: offset in the device |
| 1329 | * @allowbbt: allow access to bad block table region |
| 1330 | */ |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1331 | 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] | 1332 | { |
| 1333 | struct nand_chip *this = mtd->priv; |
Brian Norris | 39dbb02 | 2013-07-30 17:52:57 -0700 | [diff] [blame] | 1334 | int block, res; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame] | 1335 | |
Brian Norris | b4d20d6 | 2013-07-30 17:52:56 -0700 | [diff] [blame] | 1336 | block = (int)(offs >> this->bbt_erase_shift); |
| 1337 | res = bbt_get_entry(this, block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
Rafał Miłecki | 2ac63d9 | 2014-08-19 13:55:34 +0200 | [diff] [blame] | 1339 | pr_debug("nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n", |
| 1340 | (unsigned int)offs, block, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
Brian Norris | 39dbb02 | 2013-07-30 17:52:57 -0700 | [diff] [blame] | 1342 | switch (res) { |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1343 | case BBT_BLOCK_GOOD: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1344 | return 0; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1345 | case BBT_BLOCK_WORN: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1346 | return 1; |
Brian Norris | 771c568 | 2013-07-30 17:52:55 -0700 | [diff] [blame] | 1347 | case BBT_BLOCK_RESERVED: |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1348 | return allowbbt ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | } |
| 1350 | return 1; |
| 1351 | } |
| 1352 | |
Brian Norris | b32843b | 2013-07-30 17:52:59 -0700 | [diff] [blame] | 1353 | /** |
| 1354 | * nand_markbad_bbt - [NAND Interface] Mark a block bad in the BBT |
| 1355 | * @mtd: MTD device structure |
| 1356 | * @offs: offset of the bad block |
| 1357 | */ |
| 1358 | int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs) |
| 1359 | { |
| 1360 | struct nand_chip *this = mtd->priv; |
| 1361 | int block, ret = 0; |
| 1362 | |
| 1363 | block = (int)(offs >> this->bbt_erase_shift); |
| 1364 | |
| 1365 | /* Mark bad block in memory */ |
| 1366 | bbt_mark_entry(this, block, BBT_BLOCK_WORN); |
| 1367 | |
| 1368 | /* Update flash-based bad block table */ |
| 1369 | if (this->bbt_options & NAND_BBT_USE_FLASH) |
| 1370 | ret = nand_update_bbt(mtd, offs); |
| 1371 | |
| 1372 | return ret; |
| 1373 | } |
| 1374 | |
David Woodhouse | e0c7d76 | 2006-05-13 18:07:53 +0100 | [diff] [blame] | 1375 | EXPORT_SYMBOL(nand_scan_bbt); |