Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1 | /* |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2 | * Overview: |
| 3 | * Bad block table support for the NAND driver |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 4 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 5 | * Copyright © 2004 Thomas Gleixner (tglx@linutronix.de) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 6 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * Description: |
| 12 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 13 | * When nand_scan_bbt is called, then it tries to find the bad block table |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 14 | * depending on the options in the BBT descriptor(s). If no flash based BBT |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 15 | * (NAND_BBT_USE_FLASH) is specified then the device is scanned for factory |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 16 | * marked good / bad blocks. This information is used to create a memory BBT. |
| 17 | * Once a new bad block is discovered then the "factory" information is updated |
| 18 | * on the device. |
| 19 | * If a flash based BBT is specified then the function first tries to find the |
| 20 | * BBT on flash. If a BBT is found then the contents are read and the memory |
| 21 | * based BBT is created. If a mirrored BBT is selected then the mirror is |
| 22 | * searched too and the versions are compared. If the mirror has a greater |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 23 | * version number, then the mirror BBT is used to build the memory based BBT. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 24 | * If the tables are not versioned, then we "or" the bad block information. |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 25 | * If one of the BBTs is out of date or does not exist it is (re)created. |
| 26 | * If no BBT exists at all then the device is scanned for factory marked |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 27 | * good / bad blocks and the bad block tables are created. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 28 | * |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 29 | * For manufacturer created BBTs like the one found on M-SYS DOC devices |
| 30 | * the BBT is searched and read but never created |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 31 | * |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 32 | * The auto generated bad block table is located in the last good blocks |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 33 | * of the device. The table is mirrored, so it can be updated eventually. |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 34 | * The table is marked in the OOB area with an ident pattern and a version |
| 35 | * number which indicates which of both tables is more up to date. If the NAND |
| 36 | * controller needs the complete OOB area for the ECC information then the |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 37 | * option NAND_BBT_NO_OOB should be used (along with NAND_BBT_USE_FLASH, of |
| 38 | * course): it moves the ident pattern and the version byte into the data area |
| 39 | * and the OOB area will remain untouched. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 40 | * |
| 41 | * The table uses 2 bits per block |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 42 | * 11b: block is good |
| 43 | * 00b: block is factory marked bad |
Wolfgang Denk | a1be476 | 2008-05-20 16:00:29 +0200 | [diff] [blame] | 44 | * 01b, 10b: block is marked bad due to wear |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 45 | * |
| 46 | * The memory bad block table uses the following scheme: |
| 47 | * 00b: block is good |
| 48 | * 01b: block is marked bad due to wear |
| 49 | * 10b: block is reserved (to protect the bbt area) |
| 50 | * 11b: block is factory marked bad |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 51 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 52 | * Multichip devices like DOC store the bad block info per floor. |
| 53 | * |
| 54 | * Following assumptions are made: |
| 55 | * - bbts start at a page boundary, if autolocated on a block boundary |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 56 | * - the space necessary for a bbt in FLASH does not exceed a block boundary |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 57 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 58 | */ |
| 59 | |
Scott Wood | 831bbad | 2015-06-22 22:38:32 -0500 | [diff] [blame] | 60 | #include <common.h> |
| 61 | #include <malloc.h> |
| 62 | #include <linux/compat.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 63 | #include <linux/mtd/mtd.h> |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 64 | #include <linux/mtd/bbm.h> |
Masahiro Yamada | 2b7a873 | 2017-11-30 13:45:24 +0900 | [diff] [blame] | 65 | #include <linux/mtd/rawnand.h> |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 66 | #include <linux/bitops.h> |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 67 | #include <linux/string.h> |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 68 | |
| 69 | #define BBT_BLOCK_GOOD 0x00 |
| 70 | #define BBT_BLOCK_WORN 0x01 |
| 71 | #define BBT_BLOCK_RESERVED 0x02 |
| 72 | #define BBT_BLOCK_FACTORY_BAD 0x03 |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 73 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 74 | #define BBT_ENTRY_MASK 0x03 |
| 75 | #define BBT_ENTRY_SHIFT 2 |
| 76 | |
| 77 | static int nand_update_bbt(struct mtd_info *mtd, loff_t offs); |
| 78 | |
| 79 | static inline uint8_t bbt_get_entry(struct nand_chip *chip, int block) |
| 80 | { |
| 81 | uint8_t entry = chip->bbt[block >> BBT_ENTRY_SHIFT]; |
| 82 | entry >>= (block & BBT_ENTRY_MASK) * 2; |
| 83 | return entry & BBT_ENTRY_MASK; |
| 84 | } |
| 85 | |
| 86 | static inline void bbt_mark_entry(struct nand_chip *chip, int block, |
| 87 | uint8_t mark) |
| 88 | { |
| 89 | uint8_t msk = (mark & BBT_ENTRY_MASK) << ((block & BBT_ENTRY_MASK) * 2); |
| 90 | chip->bbt[block >> BBT_ENTRY_SHIFT] |= msk; |
| 91 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 92 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 93 | static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td) |
| 94 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 95 | if (memcmp(buf, td->pattern, td->len)) |
| 96 | return -1; |
| 97 | return 0; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 98 | } |
| 99 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 100 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 101 | * check_pattern - [GENERIC] check if a pattern is in the buffer |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 102 | * @buf: the buffer to search |
| 103 | * @len: the length of buffer to search |
| 104 | * @paglen: the pagelength |
| 105 | * @td: search pattern descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 106 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 107 | * Check for a pattern at the given place. Used to search bad block tables and |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 108 | * good / bad block identifiers. |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 109 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 110 | static int check_pattern(uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 111 | { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 112 | if (td->options & NAND_BBT_NO_OOB) |
| 113 | return check_pattern_no_oob(buf, td); |
| 114 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 115 | /* Compare the pattern */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 116 | if (memcmp(buf + paglen + td->offs, td->pattern, td->len)) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 117 | return -1; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 118 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 123 | * check_short_pattern - [GENERIC] check if a pattern is in the buffer |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 124 | * @buf: the buffer to search |
| 125 | * @td: search pattern descriptor |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 126 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 127 | * Check for a pattern at the given place. Used to search bad block tables and |
| 128 | * good / bad block identifiers. Same as check_pattern, but no optional empty |
| 129 | * check. |
| 130 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 131 | static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td) |
| 132 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 133 | /* Compare the pattern */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 134 | if (memcmp(buf + td->offs, td->pattern, td->len)) |
| 135 | return -1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | /** |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 140 | * add_marker_len - compute the length of the marker in data area |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 141 | * @td: BBT descriptor used for computation |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 142 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 143 | * The length will be 0 if the marker is located in OOB area. |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 144 | */ |
| 145 | static u32 add_marker_len(struct nand_bbt_descr *td) |
| 146 | { |
| 147 | u32 len; |
| 148 | |
| 149 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 150 | return 0; |
| 151 | |
| 152 | len = td->len; |
| 153 | if (td->options & NAND_BBT_VERSION) |
| 154 | len++; |
| 155 | return len; |
| 156 | } |
| 157 | |
| 158 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 159 | * read_bbt - [GENERIC] Read the bad block table starting from page |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 160 | * @mtd: MTD device structure |
| 161 | * @buf: temporary buffer |
| 162 | * @page: the starting page |
| 163 | * @num: the number of bbt descriptors to read |
| 164 | * @td: the bbt describtion table |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 165 | * @offs: block number offset in the table |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 166 | * |
| 167 | * Read the bad block table starting from page. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 168 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 169 | static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 170 | struct nand_bbt_descr *td, int offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 171 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 172 | int res, ret = 0, i, j, act = 0; |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 173 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 174 | size_t retlen, len, totlen; |
| 175 | loff_t from; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 176 | int bits = td->options & NAND_BBT_NRBITS_MSK; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 177 | uint8_t msk = (uint8_t)((1 << bits) - 1); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 178 | u32 marker_len; |
| 179 | int reserved_block_code = td->reserved_block_code; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 180 | |
| 181 | totlen = (num * bits) >> 3; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 182 | marker_len = add_marker_len(td); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 183 | from = ((loff_t)page) << this->page_shift; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 184 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 185 | while (totlen) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 186 | len = min(totlen, (size_t)(1 << this->bbt_erase_shift)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 187 | if (marker_len) { |
| 188 | /* |
| 189 | * In case the BBT marker is not in the OOB area it |
| 190 | * will be just in the first page. |
| 191 | */ |
| 192 | len -= marker_len; |
| 193 | from += marker_len; |
| 194 | marker_len = 0; |
| 195 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 196 | res = mtd_read(mtd, from, len, &retlen, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 197 | if (res < 0) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 198 | if (mtd_is_eccerr(res)) { |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 199 | pr_info("nand_bbt: ECC error in BBT at 0x%012llx\n", |
| 200 | from & ~mtd->writesize); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 201 | return res; |
| 202 | } else if (mtd_is_bitflip(res)) { |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 203 | pr_info("nand_bbt: corrected error in BBT at 0x%012llx\n", |
| 204 | from & ~mtd->writesize); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 205 | ret = res; |
| 206 | } else { |
| 207 | pr_info("nand_bbt: error reading BBT\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 208 | return res; |
| 209 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 210 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 211 | |
| 212 | /* Analyse data */ |
| 213 | for (i = 0; i < len; i++) { |
| 214 | uint8_t dat = buf[i]; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 215 | for (j = 0; j < 8; j += bits, act++) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 216 | uint8_t tmp = (dat >> j) & msk; |
| 217 | if (tmp == msk) |
| 218 | continue; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 219 | if (reserved_block_code && (tmp == reserved_block_code)) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 220 | pr_info("nand_read_bbt: reserved block at 0x%012llx\n", |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 221 | (loff_t)(offs + act) << |
| 222 | this->bbt_erase_shift); |
| 223 | bbt_mark_entry(this, offs + act, |
| 224 | BBT_BLOCK_RESERVED); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 225 | mtd->ecc_stats.bbtblocks++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 226 | continue; |
| 227 | } |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 228 | /* |
| 229 | * Leave it for now, if it's matured we can |
| 230 | * move this message to pr_debug. |
| 231 | */ |
| 232 | pr_info("nand_read_bbt: bad block at 0x%012llx\n", |
| 233 | (loff_t)(offs + act) << |
| 234 | this->bbt_erase_shift); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 235 | /* Factory marked bad or worn out? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 236 | if (tmp == 0) |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 237 | bbt_mark_entry(this, offs + act, |
| 238 | BBT_BLOCK_FACTORY_BAD); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 239 | else |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 240 | bbt_mark_entry(this, offs + act, |
| 241 | BBT_BLOCK_WORN); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 242 | mtd->ecc_stats.badblocks++; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 243 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 244 | } |
| 245 | totlen -= len; |
| 246 | from += len; |
| 247 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 248 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | /** |
| 252 | * read_abs_bbt - [GENERIC] Read the bad block table starting at a given page |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 253 | * @mtd: MTD device structure |
| 254 | * @buf: temporary buffer |
| 255 | * @td: descriptor for the bad block table |
| 256 | * @chip: read the table for a specific chip, -1 read all chips; applies only if |
| 257 | * NAND_BBT_PERCHIP option is set |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 258 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 259 | * Read the bad block table for all chips starting at a given page. We assume |
| 260 | * that the bbt bits are in consecutive order. |
| 261 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 262 | static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 263 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 264 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 265 | int res = 0, i; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 266 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 267 | if (td->options & NAND_BBT_PERCHIP) { |
| 268 | int offs = 0; |
| 269 | for (i = 0; i < this->numchips; i++) { |
| 270 | if (chip == -1 || chip == i) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 271 | res = read_bbt(mtd, buf, td->pages[i], |
| 272 | this->chipsize >> this->bbt_erase_shift, |
| 273 | td, offs); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 274 | if (res) |
| 275 | return res; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 276 | offs += this->chipsize >> this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 277 | } |
| 278 | } else { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 279 | res = read_bbt(mtd, buf, td->pages[0], |
| 280 | mtd->size >> this->bbt_erase_shift, td, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 281 | if (res) |
| 282 | return res; |
| 283 | } |
| 284 | return 0; |
| 285 | } |
| 286 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 287 | /* BBT marker is in the first page, no OOB */ |
| 288 | static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 289 | struct nand_bbt_descr *td) |
| 290 | { |
| 291 | size_t retlen; |
| 292 | size_t len; |
| 293 | |
| 294 | len = td->len; |
| 295 | if (td->options & NAND_BBT_VERSION) |
| 296 | len++; |
| 297 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 298 | return mtd_read(mtd, offs, len, &retlen, buf); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 299 | } |
| 300 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 301 | /** |
| 302 | * scan_read_oob - [GENERIC] Scan data+OOB region to buffer |
| 303 | * @mtd: MTD device structure |
| 304 | * @buf: temporary buffer |
| 305 | * @offs: offset at which to scan |
| 306 | * @len: length of data region to read |
| 307 | * |
| 308 | * Scan read data from data+OOB. May traverse multiple pages, interleaving |
| 309 | * page,OOB,page,OOB,... in buf. Completes transfer and returns the "strongest" |
| 310 | * ECC condition (error or bitflip). May quit on the first (non-ECC) error. |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 311 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 312 | static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs, |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 313 | size_t len) |
| 314 | { |
| 315 | struct mtd_oob_ops ops; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 316 | int res, ret = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 317 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 318 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 319 | ops.ooboffs = 0; |
| 320 | ops.ooblen = mtd->oobsize; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 321 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 322 | while (len > 0) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 323 | ops.datbuf = buf; |
| 324 | ops.len = min(len, (size_t)mtd->writesize); |
| 325 | ops.oobbuf = buf + ops.len; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 326 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 327 | res = mtd_read_oob(mtd, offs, &ops); |
| 328 | if (res) { |
| 329 | if (!mtd_is_bitflip_or_eccerr(res)) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 330 | return res; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 331 | else if (mtd_is_eccerr(res) || !ret) |
| 332 | ret = res; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | buf += mtd->oobsize + mtd->writesize; |
| 336 | len -= mtd->writesize; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 337 | offs += mtd->writesize; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 338 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 339 | return ret; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 340 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 341 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 342 | static int scan_read(struct mtd_info *mtd, uint8_t *buf, loff_t offs, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 343 | size_t len, struct nand_bbt_descr *td) |
| 344 | { |
| 345 | if (td->options & NAND_BBT_NO_OOB) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 346 | return scan_read_data(mtd, buf, offs, td); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 347 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 348 | return scan_read_oob(mtd, buf, offs, len); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 349 | } |
| 350 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 351 | /* Scan write data with oob to flash */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 352 | static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len, |
| 353 | uint8_t *buf, uint8_t *oob) |
| 354 | { |
| 355 | struct mtd_oob_ops ops; |
| 356 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 357 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 358 | ops.ooboffs = 0; |
| 359 | ops.ooblen = mtd->oobsize; |
| 360 | ops.datbuf = buf; |
| 361 | ops.oobbuf = oob; |
| 362 | ops.len = len; |
| 363 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 364 | return mtd_write_oob(mtd, offs, &ops); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 365 | } |
| 366 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 367 | static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td) |
| 368 | { |
| 369 | u32 ver_offs = td->veroffs; |
| 370 | |
| 371 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 372 | ver_offs += mtd->writesize; |
| 373 | return ver_offs; |
| 374 | } |
| 375 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 376 | /** |
| 377 | * read_abs_bbts - [GENERIC] Read the bad block table(s) for all chips starting at a given page |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 378 | * @mtd: MTD device structure |
| 379 | * @buf: temporary buffer |
| 380 | * @td: descriptor for the bad block table |
| 381 | * @md: descriptor for the bad block table mirror |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 382 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 383 | * Read the bad block table(s) for all chips starting at a given page. We |
| 384 | * assume that the bbt bits are in consecutive order. |
| 385 | */ |
| 386 | static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 387 | struct nand_bbt_descr *td, struct nand_bbt_descr *md) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 388 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 389 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 390 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 391 | /* Read the primary version, if available */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 392 | if (td->options & NAND_BBT_VERSION) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 393 | scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 394 | mtd->writesize, td); |
| 395 | td->version[0] = buf[bbt_get_ver_offs(mtd, td)]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 396 | pr_info("Bad block table at page %d, version 0x%02X\n", |
| 397 | td->pages[0], td->version[0]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 398 | } |
| 399 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 400 | /* Read the mirror version, if available */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 401 | if (md && (md->options & NAND_BBT_VERSION)) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 402 | scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift, |
| 403 | mtd->writesize, md); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 404 | md->version[0] = buf[bbt_get_ver_offs(mtd, md)]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 405 | pr_info("Bad block table at page %d, version 0x%02X\n", |
| 406 | md->pages[0], md->version[0]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 407 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 408 | } |
| 409 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 410 | /* Scan a given block partially */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 411 | static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 412 | loff_t offs, uint8_t *buf, int numpages) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 413 | { |
| 414 | struct mtd_oob_ops ops; |
| 415 | int j, ret; |
| 416 | |
| 417 | ops.ooblen = mtd->oobsize; |
| 418 | ops.oobbuf = buf; |
| 419 | ops.ooboffs = 0; |
| 420 | ops.datbuf = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 421 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 422 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 423 | for (j = 0; j < numpages; j++) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 424 | /* |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 425 | * Read the full oob until read_oob is fixed to handle single |
| 426 | * byte reads for 16 bit buswidth. |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 427 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 428 | ret = mtd_read_oob(mtd, offs, &ops); |
| 429 | /* Ignore ECC errors when checking for BBM */ |
| 430 | if (ret && !mtd_is_bitflip_or_eccerr(ret)) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 431 | return ret; |
| 432 | |
| 433 | if (check_short_pattern(buf, bd)) |
| 434 | return 1; |
| 435 | |
| 436 | offs += mtd->writesize; |
| 437 | } |
| 438 | return 0; |
| 439 | } |
| 440 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 441 | /** |
| 442 | * create_bbt - [GENERIC] Create a bad block table by scanning the device |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 443 | * @mtd: MTD device structure |
| 444 | * @buf: temporary buffer |
| 445 | * @bd: descriptor for the good/bad block search pattern |
| 446 | * @chip: create the table for a specific chip, -1 read all chips; applies only |
| 447 | * if NAND_BBT_PERCHIP option is set |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 448 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 449 | * Create a bad block table by scanning the device for the given good/bad block |
| 450 | * identify pattern. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 451 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 452 | static int create_bbt(struct mtd_info *mtd, uint8_t *buf, |
| 453 | struct nand_bbt_descr *bd, int chip) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 454 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 455 | struct nand_chip *this = mtd_to_nand(mtd); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 456 | int i, numblocks, numpages; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 457 | int startblock; |
| 458 | loff_t from; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 459 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 460 | pr_info("Scanning device for bad blocks\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 461 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 462 | if (bd->options & NAND_BBT_SCAN2NDPAGE) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 463 | numpages = 2; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 464 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 465 | numpages = 1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 466 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 467 | if (chip == -1) { |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 468 | numblocks = mtd->size >> this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 469 | startblock = 0; |
| 470 | from = 0; |
| 471 | } else { |
| 472 | if (chip >= this->numchips) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 473 | pr_warn("create_bbt(): chipnr (%d) > available chips (%d)\n", |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 474 | chip + 1, this->numchips); |
| 475 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 476 | } |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 477 | numblocks = this->chipsize >> this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 478 | startblock = chip * numblocks; |
| 479 | numblocks += startblock; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 480 | from = (loff_t)startblock << this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 481 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 482 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 483 | if (this->bbt_options & NAND_BBT_SCANLASTPAGE) |
| 484 | from += mtd->erasesize - (mtd->writesize * numpages); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 485 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 486 | for (i = startblock; i < numblocks; i++) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 487 | int ret; |
| 488 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 489 | BUG_ON(bd->options & NAND_BBT_NO_OOB); |
| 490 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 491 | ret = scan_block_fast(mtd, bd, from, buf, numpages); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 492 | if (ret < 0) |
| 493 | return ret; |
| 494 | |
| 495 | if (ret) { |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 496 | bbt_mark_entry(this, i, BBT_BLOCK_FACTORY_BAD); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 497 | pr_warn("Bad eraseblock %d at 0x%012llx\n", |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 498 | i, (unsigned long long)from); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 499 | mtd->ecc_stats.badblocks++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 500 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 501 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 502 | from += (1 << this->bbt_erase_shift); |
| 503 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 504 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | /** |
| 508 | * search_bbt - [GENERIC] scan the device for a specific bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 509 | * @mtd: MTD device structure |
| 510 | * @buf: temporary buffer |
| 511 | * @td: descriptor for the bad block table |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 512 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 513 | * Read the bad block table by searching for a given ident pattern. Search is |
| 514 | * preformed either from the beginning up or from the end of the device |
| 515 | * downwards. The search starts always at the start of a block. If the option |
| 516 | * NAND_BBT_PERCHIP is given, each chip is searched for a bbt, which contains |
| 517 | * the bad block information of this chip. This is necessary to provide support |
| 518 | * for certain DOC devices. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 519 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 520 | * The bbt ident pattern resides in the oob area of the first page in a block. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 521 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 522 | static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 523 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 524 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 525 | int i, chips; |
Marek Vasut | 15324ad | 2011-09-30 12:13:22 +0200 | [diff] [blame] | 526 | int startblock, block, dir; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 527 | int scanlen = mtd->writesize + mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 528 | int bbtblocks; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 529 | int blocktopage = this->bbt_erase_shift - this->page_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 530 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 531 | /* Search direction top -> down? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 532 | if (td->options & NAND_BBT_LASTBLOCK) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 533 | startblock = (mtd->size >> this->bbt_erase_shift) - 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 534 | dir = -1; |
| 535 | } else { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 536 | startblock = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 537 | dir = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 538 | } |
| 539 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 540 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 541 | if (td->options & NAND_BBT_PERCHIP) { |
| 542 | chips = this->numchips; |
| 543 | bbtblocks = this->chipsize >> this->bbt_erase_shift; |
| 544 | startblock &= bbtblocks - 1; |
| 545 | } else { |
| 546 | chips = 1; |
| 547 | bbtblocks = mtd->size >> this->bbt_erase_shift; |
| 548 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 549 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 550 | for (i = 0; i < chips; i++) { |
| 551 | /* Reset version information */ |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 552 | td->version[i] = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 553 | td->pages[i] = -1; |
| 554 | /* Scan the maximum number of blocks */ |
| 555 | for (block = 0; block < td->maxblocks; block++) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 556 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 557 | int actblock = startblock + dir * block; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 558 | loff_t offs = (loff_t)actblock << this->bbt_erase_shift; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 559 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 560 | /* Read first page */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 561 | scan_read(mtd, buf, offs, mtd->writesize, td); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 562 | if (!check_pattern(buf, scanlen, mtd->writesize, td)) { |
| 563 | td->pages[i] = actblock << blocktopage; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 564 | if (td->options & NAND_BBT_VERSION) { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 565 | offs = bbt_get_ver_offs(mtd, td); |
| 566 | td->version[i] = buf[offs]; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 567 | } |
| 568 | break; |
| 569 | } |
| 570 | } |
| 571 | startblock += this->chipsize >> this->bbt_erase_shift; |
| 572 | } |
| 573 | /* Check, if we found a bbt for each requested chip */ |
| 574 | for (i = 0; i < chips; i++) { |
| 575 | if (td->pages[i] == -1) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 576 | pr_warn("Bad block table not found for chip %d\n", i); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 577 | else |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 578 | pr_info("Bad block table found at page %d, version 0x%02X\n", |
| 579 | td->pages[i], td->version[i]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 580 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 581 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | /** |
| 585 | * search_read_bbts - [GENERIC] scan the device for bad block table(s) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 586 | * @mtd: MTD device structure |
| 587 | * @buf: temporary buffer |
| 588 | * @td: descriptor for the bad block table |
| 589 | * @md: descriptor for the bad block table mirror |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 590 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 591 | * Search and read the bad block table(s). |
| 592 | */ |
| 593 | static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 594 | struct nand_bbt_descr *td, |
| 595 | struct nand_bbt_descr *md) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 596 | { |
| 597 | /* Search the primary table */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 598 | search_bbt(mtd, buf, td); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 599 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 600 | /* Search the mirror table */ |
| 601 | if (md) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 602 | search_bbt(mtd, buf, md); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 603 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 604 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 605 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 606 | * write_bbt - [GENERIC] (Re)write the bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 607 | * @mtd: MTD device structure |
| 608 | * @buf: temporary buffer |
| 609 | * @td: descriptor for the bad block table |
| 610 | * @md: descriptor for the bad block table mirror |
| 611 | * @chipsel: selector for a specific chip, -1 for all |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 612 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 613 | * (Re)write the bad block table. |
| 614 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 615 | static int write_bbt(struct mtd_info *mtd, uint8_t *buf, |
| 616 | struct nand_bbt_descr *td, struct nand_bbt_descr *md, |
| 617 | int chipsel) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 618 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 619 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 620 | struct erase_info einfo; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 621 | int i, res, chip = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 622 | int bits, startblock, dir, page, offs, numblocks, sft, sftmsk; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 623 | int nrchips, pageoffs, ooboffs; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 624 | uint8_t msk[4]; |
| 625 | uint8_t rcode = td->reserved_block_code; |
| 626 | size_t retlen, len = 0; |
| 627 | loff_t to; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 628 | struct mtd_oob_ops ops; |
| 629 | |
| 630 | ops.ooblen = mtd->oobsize; |
| 631 | ops.ooboffs = 0; |
| 632 | ops.datbuf = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 633 | ops.mode = MTD_OPS_PLACE_OOB; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 634 | |
| 635 | if (!rcode) |
| 636 | rcode = 0xff; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 637 | /* Write bad block table per chip rather than per device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 638 | if (td->options & NAND_BBT_PERCHIP) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 639 | numblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 640 | /* Full device write or specific chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 641 | if (chipsel == -1) { |
| 642 | nrchips = this->numchips; |
| 643 | } else { |
| 644 | nrchips = chipsel + 1; |
| 645 | chip = chipsel; |
| 646 | } |
| 647 | } else { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 648 | numblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 649 | nrchips = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 650 | } |
| 651 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 652 | /* Loop through the chips */ |
| 653 | for (; chip < nrchips; chip++) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 654 | /* |
| 655 | * There was already a version of the table, reuse the page |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 656 | * This applies for absolute placement too, as we have the |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 657 | * page nr. in td->pages. |
| 658 | */ |
| 659 | if (td->pages[chip] != -1) { |
| 660 | page = td->pages[chip]; |
| 661 | goto write; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 662 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 663 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 664 | /* |
| 665 | * Automatic placement of the bad block table. Search direction |
| 666 | * top -> down? |
| 667 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 668 | if (td->options & NAND_BBT_LASTBLOCK) { |
| 669 | startblock = numblocks * (chip + 1) - 1; |
| 670 | dir = -1; |
| 671 | } else { |
| 672 | startblock = chip * numblocks; |
| 673 | dir = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 674 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 675 | |
| 676 | for (i = 0; i < td->maxblocks; i++) { |
| 677 | int block = startblock + dir * i; |
| 678 | /* Check, if the block is bad */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 679 | switch (bbt_get_entry(this, block)) { |
| 680 | case BBT_BLOCK_WORN: |
| 681 | case BBT_BLOCK_FACTORY_BAD: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 682 | continue; |
| 683 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 684 | page = block << |
| 685 | (this->bbt_erase_shift - this->page_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 686 | /* Check, if the block is used by the mirror table */ |
| 687 | if (!md || md->pages[chip] != page) |
| 688 | goto write; |
| 689 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 690 | pr_err("No space left to write bad block table\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 691 | return -ENOSPC; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 692 | write: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 693 | |
| 694 | /* Set up shift count and masks for the flash table */ |
| 695 | bits = td->options & NAND_BBT_NRBITS_MSK; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 696 | msk[2] = ~rcode; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 697 | switch (bits) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 698 | case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; |
| 699 | msk[3] = 0x01; |
| 700 | break; |
| 701 | case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; |
| 702 | msk[3] = 0x03; |
| 703 | break; |
| 704 | case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; |
| 705 | msk[3] = 0x0f; |
| 706 | break; |
| 707 | case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; |
| 708 | msk[3] = 0xff; |
| 709 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 710 | default: return -EINVAL; |
| 711 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 712 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 713 | to = ((loff_t)page) << this->page_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 714 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 715 | /* Must we save the block contents? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 716 | if (td->options & NAND_BBT_SAVECONTENT) { |
| 717 | /* Make it block aligned */ |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 718 | to &= ~(((loff_t)1 << this->bbt_erase_shift) - 1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 719 | len = 1 << this->bbt_erase_shift; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 720 | res = mtd_read(mtd, to, len, &retlen, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 721 | if (res < 0) { |
| 722 | if (retlen != len) { |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 723 | pr_info("nand_bbt: error reading block for writing the bad block table\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 724 | return res; |
| 725 | } |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 726 | pr_warn("nand_bbt: ECC error while reading block for writing bad block table\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 727 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 728 | /* Read oob data */ |
| 729 | ops.ooblen = (len >> this->page_shift) * mtd->oobsize; |
| 730 | ops.oobbuf = &buf[len]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 731 | res = mtd_read_oob(mtd, to + mtd->writesize, &ops); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 732 | if (res < 0 || ops.oobretlen != ops.ooblen) |
| 733 | goto outerr; |
| 734 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 735 | /* Calc the byte offset in the buffer */ |
| 736 | pageoffs = page - (int)(to >> this->page_shift); |
| 737 | offs = pageoffs << this->page_shift; |
| 738 | /* Preset the bbt area with 0xff */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 739 | memset(&buf[offs], 0xff, (size_t)(numblocks >> sft)); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 740 | ooboffs = len + (pageoffs * mtd->oobsize); |
| 741 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 742 | } else if (td->options & NAND_BBT_NO_OOB) { |
| 743 | ooboffs = 0; |
| 744 | offs = td->len; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 745 | /* The version byte */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 746 | if (td->options & NAND_BBT_VERSION) |
| 747 | offs++; |
| 748 | /* Calc length */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 749 | len = (size_t)(numblocks >> sft); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 750 | len += offs; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 751 | /* Make it page aligned! */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 752 | len = ALIGN(len, mtd->writesize); |
| 753 | /* Preset the buffer with 0xff */ |
| 754 | memset(buf, 0xff, len); |
| 755 | /* Pattern is located at the begin of first page */ |
| 756 | memcpy(buf, td->pattern, td->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 757 | } else { |
| 758 | /* Calc length */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 759 | len = (size_t)(numblocks >> sft); |
| 760 | /* Make it page aligned! */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 761 | len = ALIGN(len, mtd->writesize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 762 | /* Preset the buffer with 0xff */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 763 | memset(buf, 0xff, len + |
| 764 | (len >> this->page_shift)* mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 765 | offs = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 766 | ooboffs = len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 767 | /* Pattern is located in oob area of first page */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 768 | memcpy(&buf[ooboffs + td->offs], td->pattern, td->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 769 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 770 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 771 | if (td->options & NAND_BBT_VERSION) |
| 772 | buf[ooboffs + td->veroffs] = td->version[chip]; |
| 773 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 774 | /* Walk through the memory table */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 775 | for (i = 0; i < numblocks; i++) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 776 | uint8_t dat; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 777 | int sftcnt = (i << (3 - sft)) & sftmsk; |
| 778 | dat = bbt_get_entry(this, chip * numblocks + i); |
| 779 | /* Do not store the reserved bbt blocks! */ |
| 780 | buf[offs + (i >> sft)] &= ~(msk[dat] << sftcnt); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 781 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 782 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 783 | memset(&einfo, 0, sizeof(einfo)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 784 | einfo.mtd = mtd; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 785 | einfo.addr = to; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 786 | einfo.len = 1 << this->bbt_erase_shift; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 787 | res = nand_erase_nand(mtd, &einfo, 1); |
| 788 | if (res < 0) |
| 789 | goto outerr; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 790 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 791 | res = scan_write_bbt(mtd, to, len, buf, |
| 792 | td->options & NAND_BBT_NO_OOB ? NULL : |
| 793 | &buf[len]); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 794 | if (res < 0) |
| 795 | goto outerr; |
| 796 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 797 | pr_info("Bad block table written to 0x%012llx, version 0x%02X\n", |
| 798 | (unsigned long long)to, td->version[chip]); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 799 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 800 | /* Mark it as used */ |
| 801 | td->pages[chip] = page; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 802 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 803 | return 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 804 | |
| 805 | outerr: |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 806 | pr_warn("nand_bbt: error while writing bad block table %d\n", res); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 807 | return res; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 808 | } |
| 809 | |
| 810 | /** |
| 811 | * nand_memory_bbt - [GENERIC] create a memory based bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 812 | * @mtd: MTD device structure |
| 813 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 814 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 815 | * The function creates a memory based bbt by scanning the device for |
| 816 | * manufacturer / software marked good / bad blocks. |
| 817 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 818 | static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 819 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 820 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 821 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 822 | return create_bbt(mtd, this->buffers->databuf, bd, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 826 | * check_create - [GENERIC] create and write bbt(s) if necessary |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 827 | * @mtd: MTD device structure |
| 828 | * @buf: temporary buffer |
| 829 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 830 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 831 | * The function checks the results of the previous call to read_bbt and creates |
| 832 | * / updates the bbt(s) if necessary. Creation is necessary if no bbt was found |
| 833 | * for the chip/device. Update is necessary if one of the tables is missing or |
| 834 | * the version nr. of one table is less than the other. |
| 835 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 836 | static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 837 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 838 | int i, chips, writeops, create, chipsel, res, res2; |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 839 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 840 | struct nand_bbt_descr *td = this->bbt_td; |
| 841 | struct nand_bbt_descr *md = this->bbt_md; |
| 842 | struct nand_bbt_descr *rd, *rd2; |
| 843 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 844 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 845 | if (td->options & NAND_BBT_PERCHIP) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 846 | chips = this->numchips; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 847 | else |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 848 | chips = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 849 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 850 | for (i = 0; i < chips; i++) { |
| 851 | writeops = 0; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 852 | create = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 853 | rd = NULL; |
| 854 | rd2 = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 855 | res = res2 = 0; |
| 856 | /* Per chip or per device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 857 | chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 858 | /* Mirrored table available? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 859 | if (md) { |
| 860 | if (td->pages[i] == -1 && md->pages[i] == -1) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 861 | create = 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 862 | writeops = 0x03; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 863 | } else if (td->pages[i] == -1) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 864 | rd = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 865 | writeops = 0x01; |
| 866 | } else if (md->pages[i] == -1) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 867 | rd = td; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 868 | writeops = 0x02; |
| 869 | } else if (td->version[i] == md->version[i]) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 870 | rd = td; |
| 871 | if (!(td->options & NAND_BBT_VERSION)) |
| 872 | rd2 = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 873 | } else if (((int8_t)(td->version[i] - md->version[i])) > 0) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 874 | rd = td; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 875 | writeops = 0x02; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 876 | } else { |
| 877 | rd = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 878 | writeops = 0x01; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 879 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 880 | } else { |
| 881 | if (td->pages[i] == -1) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 882 | create = 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 883 | writeops = 0x01; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 884 | } else { |
| 885 | rd = td; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 886 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 887 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 888 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 889 | if (create) { |
| 890 | /* Create the bad block table by scanning the device? */ |
| 891 | if (!(td->options & NAND_BBT_CREATE)) |
| 892 | continue; |
| 893 | |
| 894 | /* Create the table in memory by scanning the chip(s) */ |
| 895 | if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY)) |
| 896 | create_bbt(mtd, buf, bd, chipsel); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 897 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 898 | td->version[i] = 1; |
| 899 | if (md) |
| 900 | md->version[i] = 1; |
| 901 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 902 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 903 | /* Read back first? */ |
| 904 | if (rd) { |
| 905 | res = read_abs_bbt(mtd, buf, rd, chipsel); |
| 906 | if (mtd_is_eccerr(res)) { |
| 907 | /* Mark table as invalid */ |
| 908 | rd->pages[i] = -1; |
| 909 | rd->version[i] = 0; |
| 910 | i--; |
| 911 | continue; |
| 912 | } |
| 913 | } |
| 914 | /* If they weren't versioned, read both */ |
| 915 | if (rd2) { |
| 916 | res2 = read_abs_bbt(mtd, buf, rd2, chipsel); |
| 917 | if (mtd_is_eccerr(res2)) { |
| 918 | /* Mark table as invalid */ |
| 919 | rd2->pages[i] = -1; |
| 920 | rd2->version[i] = 0; |
| 921 | i--; |
| 922 | continue; |
| 923 | } |
| 924 | } |
| 925 | |
| 926 | /* Scrub the flash table(s)? */ |
| 927 | if (mtd_is_bitflip(res) || mtd_is_bitflip(res2)) |
| 928 | writeops = 0x03; |
| 929 | |
| 930 | /* Update version numbers before writing */ |
| 931 | if (md) { |
| 932 | td->version[i] = max(td->version[i], md->version[i]); |
| 933 | md->version[i] = td->version[i]; |
| 934 | } |
| 935 | |
| 936 | /* Write the bad block table to the device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 937 | if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 938 | res = write_bbt(mtd, buf, td, md, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 939 | if (res < 0) |
| 940 | return res; |
| 941 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 942 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 943 | /* Write the mirror bad block table to the device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 944 | if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 945 | res = write_bbt(mtd, buf, md, td, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 946 | if (res < 0) |
| 947 | return res; |
| 948 | } |
| 949 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 950 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 954 | * mark_bbt_regions - [GENERIC] mark the bad block table regions |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 955 | * @mtd: MTD device structure |
| 956 | * @td: bad block table descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 957 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 958 | * The bad block table regions are marked as "bad" to prevent accidental |
| 959 | * erasures / writes. The regions are identified by the mark 0x02. |
| 960 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 961 | static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 962 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 963 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 964 | int i, j, chips, block, nrblocks, update; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 965 | uint8_t oldval; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 966 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 967 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 968 | if (td->options & NAND_BBT_PERCHIP) { |
| 969 | chips = this->numchips; |
| 970 | nrblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
| 971 | } else { |
| 972 | chips = 1; |
| 973 | nrblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 974 | } |
| 975 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 976 | for (i = 0; i < chips; i++) { |
| 977 | if ((td->options & NAND_BBT_ABSPAGE) || |
| 978 | !(td->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 979 | if (td->pages[i] == -1) |
| 980 | continue; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 981 | block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 982 | oldval = bbt_get_entry(this, block); |
| 983 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
| 984 | if ((oldval != BBT_BLOCK_RESERVED) && |
| 985 | td->reserved_block_code) |
| 986 | nand_update_bbt(mtd, (loff_t)block << |
| 987 | this->bbt_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 988 | continue; |
| 989 | } |
| 990 | update = 0; |
| 991 | if (td->options & NAND_BBT_LASTBLOCK) |
| 992 | block = ((i + 1) * nrblocks) - td->maxblocks; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 993 | else |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 994 | block = i * nrblocks; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 995 | for (j = 0; j < td->maxblocks; j++) { |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 996 | oldval = bbt_get_entry(this, block); |
| 997 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
| 998 | if (oldval != BBT_BLOCK_RESERVED) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 999 | update = 1; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1000 | block++; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1001 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1002 | /* |
| 1003 | * If we want reserved blocks to be recorded to flash, and some |
| 1004 | * new ones have been marked, then we need to update the stored |
| 1005 | * bbts. This should only happen once. |
| 1006 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1007 | if (update && td->reserved_block_code) |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1008 | nand_update_bbt(mtd, (loff_t)(block - 1) << |
| 1009 | this->bbt_erase_shift); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1010 | } |
| 1011 | } |
| 1012 | |
| 1013 | /** |
| 1014 | * verify_bbt_descr - verify the bad block description |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1015 | * @mtd: MTD device structure |
| 1016 | * @bd: the table to verify |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1017 | * |
| 1018 | * This functions performs a few sanity checks on the bad block description |
| 1019 | * table. |
| 1020 | */ |
| 1021 | static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
| 1022 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1023 | struct nand_chip *this = mtd_to_nand(mtd); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1024 | u32 pattern_len; |
| 1025 | u32 bits; |
| 1026 | u32 table_size; |
| 1027 | |
| 1028 | if (!bd) |
| 1029 | return; |
| 1030 | |
| 1031 | pattern_len = bd->len; |
| 1032 | bits = bd->options & NAND_BBT_NRBITS_MSK; |
| 1033 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1034 | BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) && |
| 1035 | !(this->bbt_options & NAND_BBT_USE_FLASH)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1036 | BUG_ON(!bits); |
| 1037 | |
| 1038 | if (bd->options & NAND_BBT_VERSION) |
| 1039 | pattern_len++; |
| 1040 | |
| 1041 | if (bd->options & NAND_BBT_NO_OOB) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1042 | BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH)); |
| 1043 | BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1044 | BUG_ON(bd->offs); |
| 1045 | if (bd->options & NAND_BBT_VERSION) |
| 1046 | BUG_ON(bd->veroffs != bd->len); |
| 1047 | BUG_ON(bd->options & NAND_BBT_SAVECONTENT); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1048 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1049 | |
| 1050 | if (bd->options & NAND_BBT_PERCHIP) |
| 1051 | table_size = this->chipsize >> this->bbt_erase_shift; |
| 1052 | else |
| 1053 | table_size = mtd->size >> this->bbt_erase_shift; |
| 1054 | table_size >>= 3; |
| 1055 | table_size *= bits; |
| 1056 | if (bd->options & NAND_BBT_NO_OOB) |
| 1057 | table_size += pattern_len; |
| 1058 | BUG_ON(table_size > (1 << this->bbt_erase_shift)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1059 | } |
| 1060 | |
| 1061 | /** |
| 1062 | * nand_scan_bbt - [NAND Interface] scan, find, read and maybe create bad block table(s) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1063 | * @mtd: MTD device structure |
| 1064 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1065 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1066 | * The function checks, if a bad block table(s) is/are already available. If |
| 1067 | * not it scans the device for manufacturer marked good / bad blocks and writes |
| 1068 | * the bad block table(s) to the selected place. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1069 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1070 | * The bad block table memory is allocated here. It must be freed by calling |
| 1071 | * the nand_free_bbt function. |
| 1072 | */ |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1073 | static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1074 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1075 | struct nand_chip *this = mtd_to_nand(mtd); |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1076 | int len, res; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1077 | uint8_t *buf; |
| 1078 | struct nand_bbt_descr *td = this->bbt_td; |
| 1079 | struct nand_bbt_descr *md = this->bbt_md; |
| 1080 | |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1081 | len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1082 | /* |
| 1083 | * Allocate memory (2bit per block) and clear the memory bad block |
| 1084 | * table. |
| 1085 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1086 | this->bbt = kzalloc(len, GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1087 | if (!this->bbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1088 | return -ENOMEM; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1089 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1090 | /* |
| 1091 | * If no primary table decriptor is given, scan the device to build a |
| 1092 | * memory based bad block table. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1093 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1094 | if (!td) { |
| 1095 | if ((res = nand_memory_bbt(mtd, bd))) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1096 | pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n"); |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1097 | goto err; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1098 | } |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1099 | return 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1100 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1101 | verify_bbt_descr(mtd, td); |
| 1102 | verify_bbt_descr(mtd, md); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1103 | |
| 1104 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1105 | len = (1 << this->bbt_erase_shift); |
| 1106 | len += (len >> this->page_shift) * mtd->oobsize; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1107 | buf = vmalloc(len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1108 | if (!buf) { |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1109 | res = -ENOMEM; |
| 1110 | goto err; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1111 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1112 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1113 | /* Is the bbt at a given page? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1114 | if (td->options & NAND_BBT_ABSPAGE) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1115 | read_abs_bbts(mtd, buf, td, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1116 | } else { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1117 | /* Search the bad block table using a pattern in oob */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1118 | search_read_bbts(mtd, buf, td, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1119 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1120 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1121 | res = check_create(mtd, buf, bd); |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1122 | if (res) |
| 1123 | goto err; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1124 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1125 | /* Prevent the bbt regions from erasing / writing */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1126 | mark_bbt_region(mtd, td); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1127 | if (md) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1128 | mark_bbt_region(mtd, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1129 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1130 | vfree(buf); |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1131 | return 0; |
| 1132 | |
| 1133 | err: |
| 1134 | kfree(this->bbt); |
| 1135 | this->bbt = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1136 | return res; |
| 1137 | } |
| 1138 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1139 | /** |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1140 | * nand_update_bbt - update bad block table(s) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1141 | * @mtd: MTD device structure |
| 1142 | * @offs: the offset of the newly marked block |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1143 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1144 | * The function updates the bad block table(s). |
| 1145 | */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1146 | static int nand_update_bbt(struct mtd_info *mtd, loff_t offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1147 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1148 | struct nand_chip *this = mtd_to_nand(mtd); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1149 | int len, res = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [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 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [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; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1161 | buf = kmalloc(len, GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1162 | if (!buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1163 | return -ENOMEM; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1164 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1165 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1166 | if (td->options & NAND_BBT_PERCHIP) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1167 | chip = (int)(offs >> this->chip_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1168 | chipsel = chip; |
| 1169 | } else { |
| 1170 | chip = 0; |
| 1171 | chipsel = -1; |
| 1172 | } |
| 1173 | |
| 1174 | td->version[chip]++; |
| 1175 | if (md) |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1176 | md->version[chip]++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1177 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1178 | /* Write the bad block table to the device? */ |
| 1179 | if (td->options & NAND_BBT_WRITE) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1180 | res = write_bbt(mtd, buf, td, md, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1181 | if (res < 0) |
| 1182 | goto out; |
| 1183 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1184 | /* Write the mirror bad block table to the device? */ |
| 1185 | if (md && (md->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1186 | res = write_bbt(mtd, buf, md, td, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1187 | } |
| 1188 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1189 | out: |
| 1190 | kfree(buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1191 | return res; |
| 1192 | } |
| 1193 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [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 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1198 | static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; |
| 1199 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1200 | /* Generic flash bbt descriptors */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [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 = { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1205 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1206 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1207 | .offs = 8, |
| 1208 | .len = 4, |
| 1209 | .veroffs = 12, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1210 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1211 | .pattern = bbt_pattern |
| 1212 | }; |
| 1213 | |
| 1214 | static struct nand_bbt_descr bbt_mirror_descr = { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1215 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1216 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1217 | .offs = 8, |
| 1218 | .len = 4, |
| 1219 | .veroffs = 12, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1220 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1221 | .pattern = mirror_pattern |
| 1222 | }; |
| 1223 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1224 | static struct nand_bbt_descr bbt_main_no_oob_descr = { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +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, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1230 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1231 | .pattern = bbt_pattern |
| 1232 | }; |
| 1233 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1234 | static struct nand_bbt_descr bbt_mirror_no_oob_descr = { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +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, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1240 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1241 | .pattern = mirror_pattern |
| 1242 | }; |
| 1243 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1244 | #define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1245 | /** |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1246 | * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure |
| 1247 | * @this: NAND chip to create descriptor for |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1248 | * |
| 1249 | * This function allocates and initializes a nand_bbt_descr for BBM detection |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1250 | * based on the properties of @this. The new descriptor is stored in |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1251 | * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when |
| 1252 | * passed to this function. |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1253 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1254 | static int nand_create_badblock_pattern(struct nand_chip *this) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1255 | { |
| 1256 | struct nand_bbt_descr *bd; |
| 1257 | if (this->badblock_pattern) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1258 | pr_warn("Bad block pattern already allocated; not replacing\n"); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1259 | return -EINVAL; |
| 1260 | } |
| 1261 | bd = kzalloc(sizeof(*bd), GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1262 | if (!bd) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1263 | return -ENOMEM; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1264 | bd->options = this->bbt_options & BADBLOCK_SCAN_MASK; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [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 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1273 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1274 | * nand_default_bbt - [NAND Interface] Select a default bad block table for the device |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1275 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1276 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1277 | * This function selects the default bad block table support for the device and |
| 1278 | * calls the nand_scan_bbt function. |
| 1279 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1280 | int nand_default_bbt(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1281 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1282 | struct nand_chip *this = mtd_to_nand(mtd); |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 1283 | int ret; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1284 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1285 | /* Is a flash based bad block table requested? */ |
| 1286 | if (this->bbt_options & NAND_BBT_USE_FLASH) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1287 | /* Use the default pattern descriptors */ |
| 1288 | if (!this->bbt_td) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1289 | if (this->bbt_options & NAND_BBT_NO_OOB) { |
| 1290 | this->bbt_td = &bbt_main_no_oob_descr; |
| 1291 | this->bbt_md = &bbt_mirror_no_oob_descr; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1292 | } else { |
| 1293 | this->bbt_td = &bbt_main_descr; |
| 1294 | this->bbt_md = &bbt_mirror_descr; |
| 1295 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1296 | } |
| 1297 | } else { |
| 1298 | this->bbt_td = NULL; |
| 1299 | this->bbt_md = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1300 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1301 | |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 1302 | if (!this->badblock_pattern) { |
| 1303 | ret = nand_create_badblock_pattern(this); |
| 1304 | if (ret) |
| 1305 | return ret; |
| 1306 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1307 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1308 | return nand_scan_bbt(mtd, this->badblock_pattern); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1309 | } |
| 1310 | |
| 1311 | /** |
Ezequiel Garcia | fc9d57c | 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 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1318 | struct nand_chip *this = mtd_to_nand(mtd); |
Ezequiel Garcia | fc9d57c | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 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 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1326 | * nand_isbad_bbt - [NAND Interface] Check if a block is bad |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1327 | * @mtd: MTD device structure |
| 1328 | * @offs: offset in the device |
| 1329 | * @allowbbt: allow access to bad block table region |
| 1330 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1331 | int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1332 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1333 | struct nand_chip *this = mtd_to_nand(mtd); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1334 | int block, res; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1335 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1336 | block = (int)(offs >> this->bbt_erase_shift); |
| 1337 | res = bbt_get_entry(this, block); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1338 | |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [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); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1341 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1342 | switch (res) { |
| 1343 | case BBT_BLOCK_GOOD: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1344 | return 0; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1345 | case BBT_BLOCK_WORN: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1346 | return 1; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1347 | case BBT_BLOCK_RESERVED: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1348 | return allowbbt ? 0 : 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1349 | } |
| 1350 | return 1; |
| 1351 | } |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1352 | |
| 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 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1360 | struct nand_chip *this = mtd_to_nand(mtd); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 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 | } |