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Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 25 | * If one of the BBTs is out of date or does not exist it is (re)created.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> |
Simon Glass | 0f2af88 | 2020-05-10 11:40:05 -0600 | [diff] [blame] | 61 | #include <log.h> |
Scott Wood | 831bbad | 2015-06-22 22:38:32 -0500 | [diff] [blame] | 62 | #include <malloc.h> |
Simon Glass | d66c5f7 | 2020-02-03 07:36:15 -0700 | [diff] [blame] | 63 | #include <dm/devres.h> |
Simon Glass | c06c1be | 2020-05-10 11:40:08 -0600 | [diff] [blame] | 64 | #include <linux/bug.h> |
Scott Wood | 831bbad | 2015-06-22 22:38:32 -0500 | [diff] [blame] | 65 | #include <linux/compat.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 66 | #include <linux/mtd/mtd.h> |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 67 | #include <linux/mtd/bbm.h> |
Masahiro Yamada | 2b7a873 | 2017-11-30 13:45:24 +0900 | [diff] [blame] | 68 | #include <linux/mtd/rawnand.h> |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 69 | #include <linux/bitops.h> |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 70 | #include <linux/string.h> |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 71 | |
| 72 | #define BBT_BLOCK_GOOD 0x00 |
| 73 | #define BBT_BLOCK_WORN 0x01 |
| 74 | #define BBT_BLOCK_RESERVED 0x02 |
| 75 | #define BBT_BLOCK_FACTORY_BAD 0x03 |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 76 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 77 | #define BBT_ENTRY_MASK 0x03 |
| 78 | #define BBT_ENTRY_SHIFT 2 |
| 79 | |
| 80 | static int nand_update_bbt(struct mtd_info *mtd, loff_t offs); |
| 81 | |
| 82 | static inline uint8_t bbt_get_entry(struct nand_chip *chip, int block) |
| 83 | { |
| 84 | uint8_t entry = chip->bbt[block >> BBT_ENTRY_SHIFT]; |
| 85 | entry >>= (block & BBT_ENTRY_MASK) * 2; |
| 86 | return entry & BBT_ENTRY_MASK; |
| 87 | } |
| 88 | |
| 89 | static inline void bbt_mark_entry(struct nand_chip *chip, int block, |
| 90 | uint8_t mark) |
| 91 | { |
| 92 | uint8_t msk = (mark & BBT_ENTRY_MASK) << ((block & BBT_ENTRY_MASK) * 2); |
| 93 | chip->bbt[block >> BBT_ENTRY_SHIFT] |= msk; |
| 94 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 95 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 96 | static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td) |
| 97 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 98 | if (memcmp(buf, td->pattern, td->len)) |
| 99 | return -1; |
| 100 | return 0; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 101 | } |
| 102 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 103 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 104 | * check_pattern - [GENERIC] check if a pattern is in the buffer |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 105 | * @buf: the buffer to search |
| 106 | * @len: the length of buffer to search |
| 107 | * @paglen: the pagelength |
| 108 | * @td: search pattern descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 109 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 110 | * 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] | 111 | * good / bad block identifiers. |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 112 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 113 | 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] | 114 | { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 115 | if (td->options & NAND_BBT_NO_OOB) |
| 116 | return check_pattern_no_oob(buf, td); |
| 117 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 118 | /* Compare the pattern */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 119 | if (memcmp(buf + paglen + td->offs, td->pattern, td->len)) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 120 | return -1; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 121 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 126 | * check_short_pattern - [GENERIC] check if a pattern is in the buffer |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 127 | * @buf: the buffer to search |
| 128 | * @td: search pattern descriptor |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 129 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 130 | * Check for a pattern at the given place. Used to search bad block tables and |
| 131 | * good / bad block identifiers. Same as check_pattern, but no optional empty |
| 132 | * check. |
| 133 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 134 | static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td) |
| 135 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 136 | /* Compare the pattern */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 137 | if (memcmp(buf + td->offs, td->pattern, td->len)) |
| 138 | return -1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | /** |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 143 | * add_marker_len - compute the length of the marker in data area |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 144 | * @td: BBT descriptor used for computation |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 145 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 146 | * 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] | 147 | */ |
| 148 | static u32 add_marker_len(struct nand_bbt_descr *td) |
| 149 | { |
| 150 | u32 len; |
| 151 | |
| 152 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 153 | return 0; |
| 154 | |
| 155 | len = td->len; |
| 156 | if (td->options & NAND_BBT_VERSION) |
| 157 | len++; |
| 158 | return len; |
| 159 | } |
| 160 | |
| 161 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 162 | * read_bbt - [GENERIC] Read the bad block table starting from page |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 163 | * @mtd: MTD device structure |
| 164 | * @buf: temporary buffer |
| 165 | * @page: the starting page |
| 166 | * @num: the number of bbt descriptors to read |
| 167 | * @td: the bbt describtion table |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 168 | * @offs: block number offset in the table |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 169 | * |
| 170 | * Read the bad block table starting from page. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 171 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 172 | 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] | 173 | struct nand_bbt_descr *td, int offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 174 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 175 | int res, ret = 0, i, j, act = 0; |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 176 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 177 | size_t retlen, len, totlen; |
| 178 | loff_t from; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 179 | int bits = td->options & NAND_BBT_NRBITS_MSK; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 180 | uint8_t msk = (uint8_t)((1 << bits) - 1); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 181 | u32 marker_len; |
| 182 | int reserved_block_code = td->reserved_block_code; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 183 | |
| 184 | totlen = (num * bits) >> 3; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 185 | marker_len = add_marker_len(td); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 186 | from = ((loff_t)page) << this->page_shift; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 187 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 188 | while (totlen) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 189 | len = min(totlen, (size_t)(1 << this->bbt_erase_shift)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 190 | if (marker_len) { |
| 191 | /* |
| 192 | * In case the BBT marker is not in the OOB area it |
| 193 | * will be just in the first page. |
| 194 | */ |
| 195 | len -= marker_len; |
| 196 | from += marker_len; |
| 197 | marker_len = 0; |
| 198 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 199 | res = mtd_read(mtd, from, len, &retlen, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 200 | if (res < 0) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 201 | if (mtd_is_eccerr(res)) { |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 202 | pr_info("nand_bbt: ECC error in BBT at 0x%012llx\n", |
| 203 | from & ~mtd->writesize); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 204 | return res; |
| 205 | } else if (mtd_is_bitflip(res)) { |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 206 | pr_info("nand_bbt: corrected error in BBT at 0x%012llx\n", |
| 207 | from & ~mtd->writesize); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 208 | ret = res; |
| 209 | } else { |
| 210 | pr_info("nand_bbt: error reading BBT\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 211 | return res; |
| 212 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 213 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 214 | |
| 215 | /* Analyse data */ |
| 216 | for (i = 0; i < len; i++) { |
| 217 | uint8_t dat = buf[i]; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 218 | for (j = 0; j < 8; j += bits, act++) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 219 | uint8_t tmp = (dat >> j) & msk; |
| 220 | if (tmp == msk) |
| 221 | continue; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 222 | if (reserved_block_code && (tmp == reserved_block_code)) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 223 | pr_info("nand_read_bbt: reserved block at 0x%012llx\n", |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 224 | (loff_t)(offs + act) << |
| 225 | this->bbt_erase_shift); |
| 226 | bbt_mark_entry(this, offs + act, |
| 227 | BBT_BLOCK_RESERVED); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 228 | mtd->ecc_stats.bbtblocks++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 229 | continue; |
| 230 | } |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 231 | /* |
| 232 | * Leave it for now, if it's matured we can |
| 233 | * move this message to pr_debug. |
| 234 | */ |
| 235 | pr_info("nand_read_bbt: bad block at 0x%012llx\n", |
| 236 | (loff_t)(offs + act) << |
| 237 | this->bbt_erase_shift); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 238 | /* Factory marked bad or worn out? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 239 | if (tmp == 0) |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 240 | bbt_mark_entry(this, offs + act, |
| 241 | BBT_BLOCK_FACTORY_BAD); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 242 | else |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 243 | bbt_mark_entry(this, offs + act, |
| 244 | BBT_BLOCK_WORN); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 245 | mtd->ecc_stats.badblocks++; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 246 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 247 | } |
| 248 | totlen -= len; |
| 249 | from += len; |
| 250 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 251 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | /** |
| 255 | * 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] | 256 | * @mtd: MTD device structure |
| 257 | * @buf: temporary buffer |
| 258 | * @td: descriptor for the bad block table |
| 259 | * @chip: read the table for a specific chip, -1 read all chips; applies only if |
| 260 | * NAND_BBT_PERCHIP option is set |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 261 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 262 | * Read the bad block table for all chips starting at a given page. We assume |
| 263 | * that the bbt bits are in consecutive order. |
| 264 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 265 | 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] | 266 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 267 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 268 | int res = 0, i; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 269 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 270 | if (td->options & NAND_BBT_PERCHIP) { |
| 271 | int offs = 0; |
| 272 | for (i = 0; i < this->numchips; i++) { |
| 273 | if (chip == -1 || chip == i) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 274 | res = read_bbt(mtd, buf, td->pages[i], |
| 275 | this->chipsize >> this->bbt_erase_shift, |
| 276 | td, offs); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 277 | if (res) |
| 278 | return res; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 279 | offs += this->chipsize >> this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 280 | } |
| 281 | } else { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 282 | res = read_bbt(mtd, buf, td->pages[0], |
| 283 | mtd->size >> this->bbt_erase_shift, td, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 284 | if (res) |
| 285 | return res; |
| 286 | } |
| 287 | return 0; |
| 288 | } |
| 289 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 290 | /* BBT marker is in the first page, no OOB */ |
| 291 | 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] | 292 | struct nand_bbt_descr *td) |
| 293 | { |
| 294 | size_t retlen; |
| 295 | size_t len; |
| 296 | |
| 297 | len = td->len; |
| 298 | if (td->options & NAND_BBT_VERSION) |
| 299 | len++; |
| 300 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 301 | return mtd_read(mtd, offs, len, &retlen, buf); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 302 | } |
| 303 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 304 | /** |
| 305 | * scan_read_oob - [GENERIC] Scan data+OOB region to buffer |
| 306 | * @mtd: MTD device structure |
| 307 | * @buf: temporary buffer |
| 308 | * @offs: offset at which to scan |
| 309 | * @len: length of data region to read |
| 310 | * |
| 311 | * Scan read data from data+OOB. May traverse multiple pages, interleaving |
| 312 | * page,OOB,page,OOB,... in buf. Completes transfer and returns the "strongest" |
| 313 | * 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] | 314 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 315 | 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] | 316 | size_t len) |
| 317 | { |
| 318 | struct mtd_oob_ops ops; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 319 | int res, ret = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 320 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 321 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 322 | ops.ooboffs = 0; |
| 323 | ops.ooblen = mtd->oobsize; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 324 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 325 | while (len > 0) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 326 | ops.datbuf = buf; |
| 327 | ops.len = min(len, (size_t)mtd->writesize); |
| 328 | ops.oobbuf = buf + ops.len; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 329 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 330 | res = mtd_read_oob(mtd, offs, &ops); |
| 331 | if (res) { |
| 332 | if (!mtd_is_bitflip_or_eccerr(res)) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 333 | return res; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 334 | else if (mtd_is_eccerr(res) || !ret) |
| 335 | ret = res; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | buf += mtd->oobsize + mtd->writesize; |
| 339 | len -= mtd->writesize; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 340 | offs += mtd->writesize; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 341 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 342 | return ret; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 343 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 344 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 345 | 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] | 346 | size_t len, struct nand_bbt_descr *td) |
| 347 | { |
| 348 | if (td->options & NAND_BBT_NO_OOB) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 349 | return scan_read_data(mtd, buf, offs, td); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 350 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 351 | return scan_read_oob(mtd, buf, offs, len); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 352 | } |
| 353 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 354 | /* Scan write data with oob to flash */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 355 | static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len, |
| 356 | uint8_t *buf, uint8_t *oob) |
| 357 | { |
| 358 | struct mtd_oob_ops ops; |
| 359 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 360 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 361 | ops.ooboffs = 0; |
| 362 | ops.ooblen = mtd->oobsize; |
| 363 | ops.datbuf = buf; |
| 364 | ops.oobbuf = oob; |
| 365 | ops.len = len; |
| 366 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 367 | return mtd_write_oob(mtd, offs, &ops); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 368 | } |
| 369 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 370 | static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td) |
| 371 | { |
| 372 | u32 ver_offs = td->veroffs; |
| 373 | |
| 374 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 375 | ver_offs += mtd->writesize; |
| 376 | return ver_offs; |
| 377 | } |
| 378 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 379 | /** |
| 380 | * 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] | 381 | * @mtd: MTD device structure |
| 382 | * @buf: temporary buffer |
| 383 | * @td: descriptor for the bad block table |
| 384 | * @md: descriptor for the bad block table mirror |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 385 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 386 | * Read the bad block table(s) for all chips starting at a given page. We |
| 387 | * assume that the bbt bits are in consecutive order. |
| 388 | */ |
| 389 | static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 390 | struct nand_bbt_descr *td, struct nand_bbt_descr *md) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 391 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 392 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 393 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 394 | /* Read the primary version, if available */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 395 | if (td->options & NAND_BBT_VERSION) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 396 | scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 397 | mtd->writesize, td); |
| 398 | td->version[0] = buf[bbt_get_ver_offs(mtd, td)]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 399 | pr_info("Bad block table at page %d, version 0x%02X\n", |
| 400 | td->pages[0], td->version[0]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 401 | } |
| 402 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 403 | /* Read the mirror version, if available */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 404 | if (md && (md->options & NAND_BBT_VERSION)) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 405 | scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift, |
| 406 | mtd->writesize, md); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 407 | md->version[0] = buf[bbt_get_ver_offs(mtd, md)]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 408 | pr_info("Bad block table at page %d, version 0x%02X\n", |
| 409 | md->pages[0], md->version[0]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 410 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 411 | } |
| 412 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 413 | /* Scan a given block partially */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 414 | 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] | 415 | loff_t offs, uint8_t *buf, int numpages) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 416 | { |
| 417 | struct mtd_oob_ops ops; |
| 418 | int j, ret; |
| 419 | |
| 420 | ops.ooblen = mtd->oobsize; |
| 421 | ops.oobbuf = buf; |
| 422 | ops.ooboffs = 0; |
| 423 | ops.datbuf = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 424 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 425 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 426 | for (j = 0; j < numpages; j++) { |
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 | * Read the full oob until read_oob is fixed to handle single |
| 429 | * byte reads for 16 bit buswidth. |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 430 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 431 | ret = mtd_read_oob(mtd, offs, &ops); |
| 432 | /* Ignore ECC errors when checking for BBM */ |
| 433 | if (ret && !mtd_is_bitflip_or_eccerr(ret)) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 434 | return ret; |
| 435 | |
| 436 | if (check_short_pattern(buf, bd)) |
| 437 | return 1; |
| 438 | |
| 439 | offs += mtd->writesize; |
| 440 | } |
| 441 | return 0; |
| 442 | } |
| 443 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 444 | /** |
| 445 | * create_bbt - [GENERIC] Create a bad block table by scanning the device |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 446 | * @mtd: MTD device structure |
| 447 | * @buf: temporary buffer |
| 448 | * @bd: descriptor for the good/bad block search pattern |
| 449 | * @chip: create the table for a specific chip, -1 read all chips; applies only |
| 450 | * if NAND_BBT_PERCHIP option is set |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 451 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 452 | * Create a bad block table by scanning the device for the given good/bad block |
| 453 | * identify pattern. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 454 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 455 | static int create_bbt(struct mtd_info *mtd, uint8_t *buf, |
| 456 | struct nand_bbt_descr *bd, int chip) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 457 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 458 | struct nand_chip *this = mtd_to_nand(mtd); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 459 | int i, numblocks, numpages; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 460 | int startblock; |
| 461 | loff_t from; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 462 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 463 | pr_info("Scanning device for bad blocks\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 464 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 465 | if (bd->options & NAND_BBT_SCAN2NDPAGE) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 466 | numpages = 2; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 467 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 468 | numpages = 1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 469 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 470 | if (chip == -1) { |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 471 | numblocks = mtd->size >> this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 472 | startblock = 0; |
| 473 | from = 0; |
| 474 | } else { |
| 475 | if (chip >= this->numchips) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 476 | pr_warn("create_bbt(): chipnr (%d) > available chips (%d)\n", |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 477 | chip + 1, this->numchips); |
| 478 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 479 | } |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 480 | numblocks = this->chipsize >> this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 481 | startblock = chip * numblocks; |
| 482 | numblocks += startblock; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 483 | from = (loff_t)startblock << this->bbt_erase_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 484 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 485 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 486 | if (this->bbt_options & NAND_BBT_SCANLASTPAGE) |
| 487 | from += mtd->erasesize - (mtd->writesize * numpages); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 488 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 489 | for (i = startblock; i < numblocks; i++) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 490 | int ret; |
| 491 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 492 | BUG_ON(bd->options & NAND_BBT_NO_OOB); |
| 493 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 494 | ret = scan_block_fast(mtd, bd, from, buf, numpages); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 495 | if (ret < 0) |
| 496 | return ret; |
| 497 | |
| 498 | if (ret) { |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 499 | bbt_mark_entry(this, i, BBT_BLOCK_FACTORY_BAD); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 500 | pr_warn("Bad eraseblock %d at 0x%012llx\n", |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 501 | i, (unsigned long long)from); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 502 | mtd->ecc_stats.badblocks++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 503 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 504 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 505 | from += (1 << this->bbt_erase_shift); |
| 506 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 507 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | /** |
| 511 | * search_bbt - [GENERIC] scan the device for a specific bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 512 | * @mtd: MTD device structure |
| 513 | * @buf: temporary buffer |
| 514 | * @td: descriptor for the bad block table |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 515 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 516 | * Read the bad block table by searching for a given ident pattern. Search is |
| 517 | * preformed either from the beginning up or from the end of the device |
| 518 | * downwards. The search starts always at the start of a block. If the option |
| 519 | * NAND_BBT_PERCHIP is given, each chip is searched for a bbt, which contains |
| 520 | * the bad block information of this chip. This is necessary to provide support |
| 521 | * for certain DOC devices. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 522 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 523 | * 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] | 524 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 525 | 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] | 526 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 527 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 528 | int i, chips; |
Marek Vasut | 15324ad | 2011-09-30 12:13:22 +0200 | [diff] [blame] | 529 | int startblock, block, dir; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 530 | int scanlen = mtd->writesize + mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 531 | int bbtblocks; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 532 | int blocktopage = this->bbt_erase_shift - this->page_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 533 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 534 | /* Search direction top -> down? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 535 | if (td->options & NAND_BBT_LASTBLOCK) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 536 | startblock = (mtd->size >> this->bbt_erase_shift) - 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 537 | dir = -1; |
| 538 | } else { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 539 | startblock = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 540 | dir = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 541 | } |
| 542 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 543 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 544 | if (td->options & NAND_BBT_PERCHIP) { |
| 545 | chips = this->numchips; |
| 546 | bbtblocks = this->chipsize >> this->bbt_erase_shift; |
| 547 | startblock &= bbtblocks - 1; |
| 548 | } else { |
| 549 | chips = 1; |
| 550 | bbtblocks = mtd->size >> this->bbt_erase_shift; |
| 551 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 552 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 553 | for (i = 0; i < chips; i++) { |
| 554 | /* Reset version information */ |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 555 | td->version[i] = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 556 | td->pages[i] = -1; |
| 557 | /* Scan the maximum number of blocks */ |
| 558 | for (block = 0; block < td->maxblocks; block++) { |
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 | int actblock = startblock + dir * block; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 561 | loff_t offs = (loff_t)actblock << this->bbt_erase_shift; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 562 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 563 | /* Read first page */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 564 | scan_read(mtd, buf, offs, mtd->writesize, td); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 565 | if (!check_pattern(buf, scanlen, mtd->writesize, td)) { |
| 566 | td->pages[i] = actblock << blocktopage; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 567 | if (td->options & NAND_BBT_VERSION) { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 568 | offs = bbt_get_ver_offs(mtd, td); |
| 569 | td->version[i] = buf[offs]; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 570 | } |
| 571 | break; |
| 572 | } |
| 573 | } |
| 574 | startblock += this->chipsize >> this->bbt_erase_shift; |
| 575 | } |
| 576 | /* Check, if we found a bbt for each requested chip */ |
| 577 | for (i = 0; i < chips; i++) { |
| 578 | if (td->pages[i] == -1) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 579 | pr_warn("Bad block table not found for chip %d\n", i); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 580 | else |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 581 | pr_info("Bad block table found at page %d, version 0x%02X\n", |
| 582 | td->pages[i], td->version[i]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 583 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 584 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | /** |
| 588 | * search_read_bbts - [GENERIC] scan the device for bad block table(s) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 589 | * @mtd: MTD device structure |
| 590 | * @buf: temporary buffer |
| 591 | * @td: descriptor for the bad block table |
| 592 | * @md: descriptor for the bad block table mirror |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 593 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 594 | * Search and read the bad block table(s). |
| 595 | */ |
| 596 | static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 597 | struct nand_bbt_descr *td, |
| 598 | struct nand_bbt_descr *md) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 599 | { |
| 600 | /* Search the primary table */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 601 | search_bbt(mtd, buf, td); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 602 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 603 | /* Search the mirror table */ |
| 604 | if (md) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 605 | search_bbt(mtd, buf, md); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 606 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 607 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 608 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 609 | * write_bbt - [GENERIC] (Re)write the bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 610 | * @mtd: MTD device structure |
| 611 | * @buf: temporary buffer |
| 612 | * @td: descriptor for the bad block table |
| 613 | * @md: descriptor for the bad block table mirror |
| 614 | * @chipsel: selector for a specific chip, -1 for all |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 615 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 616 | * (Re)write the bad block table. |
| 617 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 618 | static int write_bbt(struct mtd_info *mtd, uint8_t *buf, |
| 619 | struct nand_bbt_descr *td, struct nand_bbt_descr *md, |
| 620 | int chipsel) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 621 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 622 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 623 | struct erase_info einfo; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 624 | int i, res, chip = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 625 | int bits, startblock, dir, page, offs, numblocks, sft, sftmsk; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 626 | int nrchips, pageoffs, ooboffs; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 627 | uint8_t msk[4]; |
| 628 | uint8_t rcode = td->reserved_block_code; |
| 629 | size_t retlen, len = 0; |
| 630 | loff_t to; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 631 | struct mtd_oob_ops ops; |
| 632 | |
| 633 | ops.ooblen = mtd->oobsize; |
| 634 | ops.ooboffs = 0; |
| 635 | ops.datbuf = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 636 | ops.mode = MTD_OPS_PLACE_OOB; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 637 | |
| 638 | if (!rcode) |
| 639 | rcode = 0xff; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 640 | /* Write bad block table per chip rather than per device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 641 | if (td->options & NAND_BBT_PERCHIP) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 642 | numblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 643 | /* Full device write or specific chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 644 | if (chipsel == -1) { |
| 645 | nrchips = this->numchips; |
| 646 | } else { |
| 647 | nrchips = chipsel + 1; |
| 648 | chip = chipsel; |
| 649 | } |
| 650 | } else { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 651 | numblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 652 | nrchips = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 653 | } |
| 654 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 655 | /* Loop through the chips */ |
| 656 | for (; chip < nrchips; chip++) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 657 | /* |
| 658 | * There was already a version of the table, reuse the page |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 659 | * This applies for absolute placement too, as we have the |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 660 | * page nr. in td->pages. |
| 661 | */ |
| 662 | if (td->pages[chip] != -1) { |
| 663 | page = td->pages[chip]; |
| 664 | goto write; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 665 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 666 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 667 | /* |
| 668 | * Automatic placement of the bad block table. Search direction |
| 669 | * top -> down? |
| 670 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 671 | if (td->options & NAND_BBT_LASTBLOCK) { |
| 672 | startblock = numblocks * (chip + 1) - 1; |
| 673 | dir = -1; |
| 674 | } else { |
| 675 | startblock = chip * numblocks; |
| 676 | dir = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 677 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 678 | |
| 679 | for (i = 0; i < td->maxblocks; i++) { |
| 680 | int block = startblock + dir * i; |
| 681 | /* Check, if the block is bad */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 682 | switch (bbt_get_entry(this, block)) { |
| 683 | case BBT_BLOCK_WORN: |
| 684 | case BBT_BLOCK_FACTORY_BAD: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 685 | continue; |
| 686 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 687 | page = block << |
| 688 | (this->bbt_erase_shift - this->page_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 689 | /* Check, if the block is used by the mirror table */ |
| 690 | if (!md || md->pages[chip] != page) |
| 691 | goto write; |
| 692 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 693 | pr_err("No space left to write bad block table\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 694 | return -ENOSPC; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 695 | write: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 696 | |
| 697 | /* Set up shift count and masks for the flash table */ |
| 698 | bits = td->options & NAND_BBT_NRBITS_MSK; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 699 | msk[2] = ~rcode; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 700 | switch (bits) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 701 | case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; |
| 702 | msk[3] = 0x01; |
| 703 | break; |
| 704 | case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; |
| 705 | msk[3] = 0x03; |
| 706 | break; |
| 707 | case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; |
| 708 | msk[3] = 0x0f; |
| 709 | break; |
| 710 | case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; |
| 711 | msk[3] = 0xff; |
| 712 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 713 | default: return -EINVAL; |
| 714 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 715 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 716 | to = ((loff_t)page) << this->page_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 717 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 718 | /* Must we save the block contents? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 719 | if (td->options & NAND_BBT_SAVECONTENT) { |
| 720 | /* Make it block aligned */ |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 721 | to &= ~(((loff_t)1 << this->bbt_erase_shift) - 1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 722 | len = 1 << this->bbt_erase_shift; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 723 | res = mtd_read(mtd, to, len, &retlen, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 724 | if (res < 0) { |
| 725 | if (retlen != len) { |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 726 | 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] | 727 | return res; |
| 728 | } |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 729 | 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] | 730 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 731 | /* Read oob data */ |
| 732 | ops.ooblen = (len >> this->page_shift) * mtd->oobsize; |
| 733 | ops.oobbuf = &buf[len]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 734 | res = mtd_read_oob(mtd, to + mtd->writesize, &ops); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 735 | if (res < 0 || ops.oobretlen != ops.ooblen) |
| 736 | goto outerr; |
| 737 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 738 | /* Calc the byte offset in the buffer */ |
| 739 | pageoffs = page - (int)(to >> this->page_shift); |
| 740 | offs = pageoffs << this->page_shift; |
| 741 | /* Preset the bbt area with 0xff */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 742 | memset(&buf[offs], 0xff, (size_t)(numblocks >> sft)); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 743 | ooboffs = len + (pageoffs * mtd->oobsize); |
| 744 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 745 | } else if (td->options & NAND_BBT_NO_OOB) { |
| 746 | ooboffs = 0; |
| 747 | offs = td->len; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 748 | /* The version byte */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 749 | if (td->options & NAND_BBT_VERSION) |
| 750 | offs++; |
| 751 | /* Calc length */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 752 | len = (size_t)(numblocks >> sft); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 753 | len += offs; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 754 | /* Make it page aligned! */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 755 | len = ALIGN(len, mtd->writesize); |
| 756 | /* Preset the buffer with 0xff */ |
| 757 | memset(buf, 0xff, len); |
| 758 | /* Pattern is located at the begin of first page */ |
| 759 | memcpy(buf, td->pattern, td->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 760 | } else { |
| 761 | /* Calc length */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 762 | len = (size_t)(numblocks >> sft); |
| 763 | /* Make it page aligned! */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 764 | len = ALIGN(len, mtd->writesize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 765 | /* Preset the buffer with 0xff */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 766 | memset(buf, 0xff, len + |
| 767 | (len >> this->page_shift)* mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 768 | offs = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 769 | ooboffs = len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 770 | /* Pattern is located in oob area of first page */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 771 | memcpy(&buf[ooboffs + td->offs], td->pattern, td->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 772 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 773 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 774 | if (td->options & NAND_BBT_VERSION) |
| 775 | buf[ooboffs + td->veroffs] = td->version[chip]; |
| 776 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 777 | /* Walk through the memory table */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 778 | for (i = 0; i < numblocks; i++) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 779 | uint8_t dat; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 780 | int sftcnt = (i << (3 - sft)) & sftmsk; |
| 781 | dat = bbt_get_entry(this, chip * numblocks + i); |
| 782 | /* Do not store the reserved bbt blocks! */ |
| 783 | buf[offs + (i >> sft)] &= ~(msk[dat] << sftcnt); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 784 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 785 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 786 | memset(&einfo, 0, sizeof(einfo)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 787 | einfo.mtd = mtd; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 788 | einfo.addr = to; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 789 | einfo.len = 1 << this->bbt_erase_shift; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 790 | res = nand_erase_nand(mtd, &einfo, 1); |
| 791 | if (res < 0) |
| 792 | goto outerr; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 793 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 794 | res = scan_write_bbt(mtd, to, len, buf, |
| 795 | td->options & NAND_BBT_NO_OOB ? NULL : |
| 796 | &buf[len]); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 797 | if (res < 0) |
| 798 | goto outerr; |
| 799 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 800 | pr_info("Bad block table written to 0x%012llx, version 0x%02X\n", |
| 801 | (unsigned long long)to, td->version[chip]); |
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 | /* Mark it as used */ |
| 804 | td->pages[chip] = page; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 805 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 806 | return 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 807 | |
| 808 | outerr: |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 809 | 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] | 810 | return res; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | /** |
| 814 | * nand_memory_bbt - [GENERIC] create a memory based bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 815 | * @mtd: MTD device structure |
| 816 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 817 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 818 | * The function creates a memory based bbt by scanning the device for |
| 819 | * manufacturer / software marked good / bad blocks. |
| 820 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 821 | 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] | 822 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 823 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 824 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 825 | return create_bbt(mtd, this->buffers->databuf, bd, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 829 | * check_create - [GENERIC] create and write bbt(s) if necessary |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 830 | * @mtd: MTD device structure |
| 831 | * @buf: temporary buffer |
| 832 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 833 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 834 | * The function checks the results of the previous call to read_bbt and creates |
| 835 | * / updates the bbt(s) if necessary. Creation is necessary if no bbt was found |
| 836 | * for the chip/device. Update is necessary if one of the tables is missing or |
| 837 | * the version nr. of one table is less than the other. |
| 838 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 839 | 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] | 840 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 841 | int i, chips, writeops, create, chipsel, res, res2; |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 842 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 843 | struct nand_bbt_descr *td = this->bbt_td; |
| 844 | struct nand_bbt_descr *md = this->bbt_md; |
| 845 | struct nand_bbt_descr *rd, *rd2; |
| 846 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 847 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 848 | if (td->options & NAND_BBT_PERCHIP) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 849 | chips = this->numchips; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 850 | else |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 851 | chips = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 852 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 853 | for (i = 0; i < chips; i++) { |
| 854 | writeops = 0; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 855 | create = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 856 | rd = NULL; |
| 857 | rd2 = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 858 | res = res2 = 0; |
| 859 | /* Per chip or per device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 860 | chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 861 | /* Mirrored table available? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 862 | if (md) { |
| 863 | if (td->pages[i] == -1 && md->pages[i] == -1) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 864 | create = 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 865 | writeops = 0x03; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 866 | } else if (td->pages[i] == -1) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 867 | rd = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 868 | writeops = 0x01; |
| 869 | } else if (md->pages[i] == -1) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 870 | rd = td; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 871 | writeops = 0x02; |
| 872 | } else if (td->version[i] == md->version[i]) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 873 | rd = td; |
| 874 | if (!(td->options & NAND_BBT_VERSION)) |
| 875 | rd2 = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 876 | } else if (((int8_t)(td->version[i] - md->version[i])) > 0) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 877 | rd = td; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 878 | writeops = 0x02; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 879 | } else { |
| 880 | rd = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 881 | writeops = 0x01; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 882 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 883 | } else { |
| 884 | if (td->pages[i] == -1) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 885 | create = 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 886 | writeops = 0x01; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 887 | } else { |
| 888 | rd = td; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 889 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 890 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 891 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 892 | if (create) { |
| 893 | /* Create the bad block table by scanning the device? */ |
| 894 | if (!(td->options & NAND_BBT_CREATE)) |
| 895 | continue; |
| 896 | |
| 897 | /* Create the table in memory by scanning the chip(s) */ |
| 898 | if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY)) |
| 899 | create_bbt(mtd, buf, bd, chipsel); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 900 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 901 | td->version[i] = 1; |
| 902 | if (md) |
| 903 | md->version[i] = 1; |
| 904 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 905 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 906 | /* Read back first? */ |
| 907 | if (rd) { |
| 908 | res = read_abs_bbt(mtd, buf, rd, chipsel); |
| 909 | if (mtd_is_eccerr(res)) { |
| 910 | /* Mark table as invalid */ |
| 911 | rd->pages[i] = -1; |
| 912 | rd->version[i] = 0; |
| 913 | i--; |
| 914 | continue; |
| 915 | } |
| 916 | } |
| 917 | /* If they weren't versioned, read both */ |
| 918 | if (rd2) { |
| 919 | res2 = read_abs_bbt(mtd, buf, rd2, chipsel); |
| 920 | if (mtd_is_eccerr(res2)) { |
| 921 | /* Mark table as invalid */ |
| 922 | rd2->pages[i] = -1; |
| 923 | rd2->version[i] = 0; |
| 924 | i--; |
| 925 | continue; |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | /* Scrub the flash table(s)? */ |
| 930 | if (mtd_is_bitflip(res) || mtd_is_bitflip(res2)) |
| 931 | writeops = 0x03; |
| 932 | |
| 933 | /* Update version numbers before writing */ |
| 934 | if (md) { |
| 935 | td->version[i] = max(td->version[i], md->version[i]); |
| 936 | md->version[i] = td->version[i]; |
| 937 | } |
| 938 | |
| 939 | /* Write the bad block table to the device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 940 | if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 941 | res = write_bbt(mtd, buf, td, md, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 942 | if (res < 0) |
| 943 | return res; |
| 944 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 945 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 946 | /* Write the mirror bad block table to the device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 947 | if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 948 | res = write_bbt(mtd, buf, md, td, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 949 | if (res < 0) |
| 950 | return res; |
| 951 | } |
| 952 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 953 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 957 | * mark_bbt_regions - [GENERIC] mark the bad block table regions |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 958 | * @mtd: MTD device structure |
| 959 | * @td: bad block table descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 960 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 961 | * The bad block table regions are marked as "bad" to prevent accidental |
| 962 | * erasures / writes. The regions are identified by the mark 0x02. |
| 963 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 964 | 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] | 965 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 966 | struct nand_chip *this = mtd_to_nand(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 967 | int i, j, chips, block, nrblocks, update; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 968 | uint8_t oldval; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 969 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 970 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 971 | if (td->options & NAND_BBT_PERCHIP) { |
| 972 | chips = this->numchips; |
| 973 | nrblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
| 974 | } else { |
| 975 | chips = 1; |
| 976 | nrblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 977 | } |
| 978 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 979 | for (i = 0; i < chips; i++) { |
| 980 | if ((td->options & NAND_BBT_ABSPAGE) || |
| 981 | !(td->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 982 | if (td->pages[i] == -1) |
| 983 | continue; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 984 | block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 985 | oldval = bbt_get_entry(this, block); |
| 986 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
| 987 | if ((oldval != BBT_BLOCK_RESERVED) && |
| 988 | td->reserved_block_code) |
| 989 | nand_update_bbt(mtd, (loff_t)block << |
| 990 | this->bbt_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 991 | continue; |
| 992 | } |
| 993 | update = 0; |
| 994 | if (td->options & NAND_BBT_LASTBLOCK) |
| 995 | block = ((i + 1) * nrblocks) - td->maxblocks; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 996 | else |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 997 | block = i * nrblocks; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 998 | for (j = 0; j < td->maxblocks; j++) { |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 999 | oldval = bbt_get_entry(this, block); |
| 1000 | bbt_mark_entry(this, block, BBT_BLOCK_RESERVED); |
| 1001 | if (oldval != BBT_BLOCK_RESERVED) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1002 | update = 1; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1003 | block++; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1004 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1005 | /* |
| 1006 | * If we want reserved blocks to be recorded to flash, and some |
| 1007 | * new ones have been marked, then we need to update the stored |
| 1008 | * bbts. This should only happen once. |
| 1009 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1010 | if (update && td->reserved_block_code) |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1011 | nand_update_bbt(mtd, (loff_t)(block - 1) << |
| 1012 | this->bbt_erase_shift); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1013 | } |
| 1014 | } |
| 1015 | |
| 1016 | /** |
| 1017 | * verify_bbt_descr - verify the bad block description |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1018 | * @mtd: MTD device structure |
| 1019 | * @bd: the table to verify |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1020 | * |
| 1021 | * This functions performs a few sanity checks on the bad block description |
| 1022 | * table. |
| 1023 | */ |
| 1024 | static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
| 1025 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1026 | struct nand_chip *this = mtd_to_nand(mtd); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1027 | u32 pattern_len; |
| 1028 | u32 bits; |
| 1029 | u32 table_size; |
| 1030 | |
| 1031 | if (!bd) |
| 1032 | return; |
| 1033 | |
| 1034 | pattern_len = bd->len; |
| 1035 | bits = bd->options & NAND_BBT_NRBITS_MSK; |
| 1036 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1037 | BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) && |
| 1038 | !(this->bbt_options & NAND_BBT_USE_FLASH)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1039 | BUG_ON(!bits); |
| 1040 | |
| 1041 | if (bd->options & NAND_BBT_VERSION) |
| 1042 | pattern_len++; |
| 1043 | |
| 1044 | if (bd->options & NAND_BBT_NO_OOB) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1045 | BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH)); |
| 1046 | BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1047 | BUG_ON(bd->offs); |
| 1048 | if (bd->options & NAND_BBT_VERSION) |
| 1049 | BUG_ON(bd->veroffs != bd->len); |
| 1050 | BUG_ON(bd->options & NAND_BBT_SAVECONTENT); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1051 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1052 | |
| 1053 | if (bd->options & NAND_BBT_PERCHIP) |
| 1054 | table_size = this->chipsize >> this->bbt_erase_shift; |
| 1055 | else |
| 1056 | table_size = mtd->size >> this->bbt_erase_shift; |
| 1057 | table_size >>= 3; |
| 1058 | table_size *= bits; |
| 1059 | if (bd->options & NAND_BBT_NO_OOB) |
| 1060 | table_size += pattern_len; |
| 1061 | BUG_ON(table_size > (1 << this->bbt_erase_shift)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1062 | } |
| 1063 | |
| 1064 | /** |
| 1065 | * 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] | 1066 | * @mtd: MTD device structure |
| 1067 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1068 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1069 | * The function checks, if a bad block table(s) is/are already available. If |
| 1070 | * not it scans the device for manufacturer marked good / bad blocks and writes |
| 1071 | * the bad block table(s) to the selected place. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1072 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1073 | * The bad block table memory is allocated here. It must be freed by calling |
| 1074 | * the nand_free_bbt function. |
| 1075 | */ |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1076 | 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] | 1077 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1078 | struct nand_chip *this = mtd_to_nand(mtd); |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1079 | int len, res; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1080 | uint8_t *buf; |
| 1081 | struct nand_bbt_descr *td = this->bbt_td; |
| 1082 | struct nand_bbt_descr *md = this->bbt_md; |
| 1083 | |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1084 | len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1085 | /* |
| 1086 | * Allocate memory (2bit per block) and clear the memory bad block |
| 1087 | * table. |
| 1088 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1089 | this->bbt = kzalloc(len, GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1090 | if (!this->bbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1091 | return -ENOMEM; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1092 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1093 | /* |
| 1094 | * If no primary table decriptor is given, scan the device to build a |
| 1095 | * memory based bad block table. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1096 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1097 | if (!td) { |
| 1098 | if ((res = nand_memory_bbt(mtd, bd))) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1099 | 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] | 1100 | goto err; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1101 | } |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1102 | return 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1103 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1104 | verify_bbt_descr(mtd, td); |
| 1105 | verify_bbt_descr(mtd, md); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1106 | |
| 1107 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1108 | len = (1 << this->bbt_erase_shift); |
| 1109 | len += (len >> this->page_shift) * mtd->oobsize; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1110 | buf = vmalloc(len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1111 | if (!buf) { |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1112 | res = -ENOMEM; |
| 1113 | goto err; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1114 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1115 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1116 | /* Is the bbt at a given page? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1117 | if (td->options & NAND_BBT_ABSPAGE) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1118 | read_abs_bbts(mtd, buf, td, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1119 | } else { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1120 | /* Search the bad block table using a pattern in oob */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1121 | search_read_bbts(mtd, buf, td, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1122 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1123 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1124 | res = check_create(mtd, buf, bd); |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1125 | if (res) |
| 1126 | goto err; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1127 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1128 | /* Prevent the bbt regions from erasing / writing */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1129 | mark_bbt_region(mtd, td); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1130 | if (md) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1131 | mark_bbt_region(mtd, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1132 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1133 | vfree(buf); |
Scott Wood | 52ab7ce | 2016-05-30 13:57:58 -0500 | [diff] [blame] | 1134 | return 0; |
| 1135 | |
| 1136 | err: |
| 1137 | kfree(this->bbt); |
| 1138 | this->bbt = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1139 | return res; |
| 1140 | } |
| 1141 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1142 | /** |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1143 | * nand_update_bbt - update bad block table(s) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1144 | * @mtd: MTD device structure |
| 1145 | * @offs: the offset of the newly marked block |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1146 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1147 | * The function updates the bad block table(s). |
| 1148 | */ |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1149 | static int nand_update_bbt(struct mtd_info *mtd, loff_t offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1150 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1151 | struct nand_chip *this = mtd_to_nand(mtd); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1152 | int len, res = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1153 | int chip, chipsel; |
| 1154 | uint8_t *buf; |
| 1155 | struct nand_bbt_descr *td = this->bbt_td; |
| 1156 | struct nand_bbt_descr *md = this->bbt_md; |
| 1157 | |
| 1158 | if (!this->bbt || !td) |
| 1159 | return -EINVAL; |
| 1160 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1161 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1162 | len = (1 << this->bbt_erase_shift); |
| 1163 | len += (len >> this->page_shift) * mtd->oobsize; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1164 | buf = kmalloc(len, GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1165 | if (!buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1166 | return -ENOMEM; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1167 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1168 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1169 | if (td->options & NAND_BBT_PERCHIP) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1170 | chip = (int)(offs >> this->chip_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1171 | chipsel = chip; |
| 1172 | } else { |
| 1173 | chip = 0; |
| 1174 | chipsel = -1; |
| 1175 | } |
| 1176 | |
| 1177 | td->version[chip]++; |
| 1178 | if (md) |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1179 | md->version[chip]++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1180 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1181 | /* Write the bad block table to the device? */ |
| 1182 | if (td->options & NAND_BBT_WRITE) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1183 | res = write_bbt(mtd, buf, td, md, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1184 | if (res < 0) |
| 1185 | goto out; |
| 1186 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1187 | /* Write the mirror bad block table to the device? */ |
| 1188 | if (md && (md->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1189 | res = write_bbt(mtd, buf, md, td, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1190 | } |
| 1191 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1192 | out: |
| 1193 | kfree(buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1194 | return res; |
| 1195 | } |
| 1196 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1197 | /* |
| 1198 | * Define some generic bad / good block scan pattern which are used |
| 1199 | * while scanning a device for factory marked good / bad blocks. |
| 1200 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1201 | static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; |
| 1202 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1203 | /* Generic flash bbt descriptors */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1204 | static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' }; |
| 1205 | static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' }; |
| 1206 | |
| 1207 | static struct nand_bbt_descr bbt_main_descr = { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1208 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1209 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1210 | .offs = 8, |
| 1211 | .len = 4, |
| 1212 | .veroffs = 12, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1213 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1214 | .pattern = bbt_pattern |
| 1215 | }; |
| 1216 | |
| 1217 | static struct nand_bbt_descr bbt_mirror_descr = { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1218 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1219 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1220 | .offs = 8, |
| 1221 | .len = 4, |
| 1222 | .veroffs = 12, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1223 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1224 | .pattern = mirror_pattern |
| 1225 | }; |
| 1226 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1227 | static struct nand_bbt_descr bbt_main_no_oob_descr = { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1228 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1229 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1230 | | NAND_BBT_NO_OOB, |
| 1231 | .len = 4, |
| 1232 | .veroffs = 4, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1233 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1234 | .pattern = bbt_pattern |
| 1235 | }; |
| 1236 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1237 | static struct nand_bbt_descr bbt_mirror_no_oob_descr = { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1238 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1239 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1240 | | NAND_BBT_NO_OOB, |
| 1241 | .len = 4, |
| 1242 | .veroffs = 4, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1243 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1244 | .pattern = mirror_pattern |
| 1245 | }; |
| 1246 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1247 | #define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1248 | /** |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1249 | * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure |
| 1250 | * @this: NAND chip to create descriptor for |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1251 | * |
| 1252 | * This function allocates and initializes a nand_bbt_descr for BBM detection |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1253 | * based on the properties of @this. The new descriptor is stored in |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1254 | * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when |
| 1255 | * passed to this function. |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1256 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1257 | static int nand_create_badblock_pattern(struct nand_chip *this) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1258 | { |
| 1259 | struct nand_bbt_descr *bd; |
| 1260 | if (this->badblock_pattern) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1261 | pr_warn("Bad block pattern already allocated; not replacing\n"); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1262 | return -EINVAL; |
| 1263 | } |
| 1264 | bd = kzalloc(sizeof(*bd), GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1265 | if (!bd) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1266 | return -ENOMEM; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1267 | bd->options = this->bbt_options & BADBLOCK_SCAN_MASK; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1268 | bd->offs = this->badblockpos; |
| 1269 | bd->len = (this->options & NAND_BUSWIDTH_16) ? 2 : 1; |
| 1270 | bd->pattern = scan_ff_pattern; |
| 1271 | bd->options |= NAND_BBT_DYNAMICSTRUCT; |
| 1272 | this->badblock_pattern = bd; |
| 1273 | return 0; |
| 1274 | } |
| 1275 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1276 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1277 | * 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] | 1278 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1279 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1280 | * This function selects the default bad block table support for the device and |
| 1281 | * calls the nand_scan_bbt function. |
| 1282 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1283 | int nand_default_bbt(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1284 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1285 | struct nand_chip *this = mtd_to_nand(mtd); |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 1286 | int ret; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1287 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1288 | /* Is a flash based bad block table requested? */ |
| 1289 | if (this->bbt_options & NAND_BBT_USE_FLASH) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1290 | /* Use the default pattern descriptors */ |
| 1291 | if (!this->bbt_td) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1292 | if (this->bbt_options & NAND_BBT_NO_OOB) { |
| 1293 | this->bbt_td = &bbt_main_no_oob_descr; |
| 1294 | this->bbt_md = &bbt_mirror_no_oob_descr; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1295 | } else { |
| 1296 | this->bbt_td = &bbt_main_descr; |
| 1297 | this->bbt_md = &bbt_mirror_descr; |
| 1298 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1299 | } |
| 1300 | } else { |
| 1301 | this->bbt_td = NULL; |
| 1302 | this->bbt_md = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1303 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1304 | |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 1305 | if (!this->badblock_pattern) { |
| 1306 | ret = nand_create_badblock_pattern(this); |
| 1307 | if (ret) |
| 1308 | return ret; |
| 1309 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1310 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1311 | return nand_scan_bbt(mtd, this->badblock_pattern); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1312 | } |
| 1313 | |
| 1314 | /** |
Ezequiel Garcia | fc9d57c | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 1315 | * nand_isreserved_bbt - [NAND Interface] Check if a block is reserved |
| 1316 | * @mtd: MTD device structure |
| 1317 | * @offs: offset in the device |
| 1318 | */ |
| 1319 | int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs) |
| 1320 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1321 | struct nand_chip *this = mtd_to_nand(mtd); |
Ezequiel Garcia | fc9d57c | 2014-05-21 19:06:12 -0300 | [diff] [blame] | 1322 | int block; |
| 1323 | |
| 1324 | block = (int)(offs >> this->bbt_erase_shift); |
| 1325 | return bbt_get_entry(this, block) == BBT_BLOCK_RESERVED; |
| 1326 | } |
| 1327 | |
| 1328 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1329 | * nand_isbad_bbt - [NAND Interface] Check if a block is bad |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1330 | * @mtd: MTD device structure |
| 1331 | * @offs: offset in the device |
| 1332 | * @allowbbt: allow access to bad block table region |
Ashok Reddy Soma | 3b0d294 | 2023-01-05 02:46:20 -0700 | [diff] [blame^] | 1333 | * Return: 0 - good block, 1- bad block, 2 - reserved block |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1334 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1335 | 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] | 1336 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1337 | struct nand_chip *this = mtd_to_nand(mtd); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1338 | int block, res; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1339 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1340 | block = (int)(offs >> this->bbt_erase_shift); |
| 1341 | res = bbt_get_entry(this, block); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1342 | |
Scott Wood | 3ea94ed | 2015-06-26 19:03:26 -0500 | [diff] [blame] | 1343 | pr_debug("nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n", |
| 1344 | (unsigned int)offs, block, res); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1345 | |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1346 | switch (res) { |
| 1347 | case BBT_BLOCK_GOOD: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1348 | return 0; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1349 | case BBT_BLOCK_WORN: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1350 | return 1; |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1351 | case BBT_BLOCK_RESERVED: |
Ashok Reddy Soma | 3b0d294 | 2023-01-05 02:46:20 -0700 | [diff] [blame^] | 1352 | return allowbbt ? 0 : 2; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1353 | } |
| 1354 | return 1; |
| 1355 | } |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1356 | |
| 1357 | /** |
| 1358 | * nand_markbad_bbt - [NAND Interface] Mark a block bad in the BBT |
| 1359 | * @mtd: MTD device structure |
| 1360 | * @offs: offset of the bad block |
| 1361 | */ |
| 1362 | int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs) |
| 1363 | { |
Scott Wood | 17fed14 | 2016-05-30 13:57:56 -0500 | [diff] [blame] | 1364 | struct nand_chip *this = mtd_to_nand(mtd); |
Heiko Schocher | f5895d1 | 2014-06-24 10:10:04 +0200 | [diff] [blame] | 1365 | int block, ret = 0; |
| 1366 | |
| 1367 | block = (int)(offs >> this->bbt_erase_shift); |
| 1368 | |
| 1369 | /* Mark bad block in memory */ |
| 1370 | bbt_mark_entry(this, block, BBT_BLOCK_WORN); |
| 1371 | |
| 1372 | /* Update flash-based bad block table */ |
| 1373 | if (this->bbt_options & NAND_BBT_USE_FLASH) |
| 1374 | ret = nand_update_bbt(mtd, offs); |
| 1375 | |
| 1376 | return ret; |
| 1377 | } |