Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1 | /* |
| 2 | * drivers/mtd/nand_bbt.c |
| 3 | * |
| 4 | * Overview: |
| 5 | * Bad block table support for the NAND driver |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 6 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 7 | * Copyright © 2004 Thomas Gleixner (tglx@linutronix.de) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 8 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * Description: |
| 14 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 15 | * 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] | 16 | * 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] | 17 | * (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] | 18 | * marked good / bad blocks. This information is used to create a memory BBT. |
| 19 | * Once a new bad block is discovered then the "factory" information is updated |
| 20 | * on the device. |
| 21 | * If a flash based BBT is specified then the function first tries to find the |
| 22 | * BBT on flash. If a BBT is found then the contents are read and the memory |
| 23 | * based BBT is created. If a mirrored BBT is selected then the mirror is |
| 24 | * searched too and the versions are compared. If the mirror has a greater |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 25 | * 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] | 26 | * 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Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 27 | * If one of the BBTs is out of date or does not exist it is (re)created. |
| 28 | * If no BBT exists at all then the device is scanned for factory marked |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 29 | * good / bad blocks and the bad block tables are created. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 30 | * |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 31 | * For manufacturer created BBTs like the one found on M-SYS DOC devices |
| 32 | * the BBT is searched and read but never created |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 33 | * |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 34 | * 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] | 35 | * 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] | 36 | * The table is marked in the OOB area with an ident pattern and a version |
| 37 | * number which indicates which of both tables is more up to date. If the NAND |
| 38 | * controller needs the complete OOB area for the ECC information then the |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 39 | * option NAND_BBT_NO_OOB should be used (along with NAND_BBT_USE_FLASH, of |
| 40 | * course): it moves the ident pattern and the version byte into the data area |
| 41 | * and the OOB area will remain untouched. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 42 | * |
| 43 | * The table uses 2 bits per block |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 44 | * 11b: block is good |
| 45 | * 00b: block is factory marked bad |
Wolfgang Denk | a1be476 | 2008-05-20 16:00:29 +0200 | [diff] [blame] | 46 | * 01b, 10b: block is marked bad due to wear |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 47 | * |
| 48 | * The memory bad block table uses the following scheme: |
| 49 | * 00b: block is good |
| 50 | * 01b: block is marked bad due to wear |
| 51 | * 10b: block is reserved (to protect the bbt area) |
| 52 | * 11b: block is factory marked bad |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 53 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 54 | * Multichip devices like DOC store the bad block info per floor. |
| 55 | * |
| 56 | * Following assumptions are made: |
| 57 | * - bbts start at a page boundary, if autolocated on a block boundary |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 58 | * - 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] | 59 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 60 | */ |
| 61 | |
| 62 | #include <common.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 63 | #include <malloc.h> |
Mike Frysinger | 11d1a09 | 2012-04-09 13:39:55 +0000 | [diff] [blame] | 64 | #include <linux/compat.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 65 | #include <linux/mtd/mtd.h> |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 66 | #include <linux/mtd/bbm.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 67 | #include <linux/mtd/nand.h> |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 68 | #include <linux/mtd/nand_ecc.h> |
| 69 | #include <linux/bitops.h> |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 70 | #include <linux/string.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 71 | |
| 72 | #include <asm/errno.h> |
| 73 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 74 | static int check_pattern_no_oob(uint8_t *buf, struct nand_bbt_descr *td) |
| 75 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 76 | if (memcmp(buf, td->pattern, td->len)) |
| 77 | return -1; |
| 78 | return 0; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 79 | } |
| 80 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 81 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 82 | * check_pattern - [GENERIC] check if a pattern is in the buffer |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 83 | * @buf: the buffer to search |
| 84 | * @len: the length of buffer to search |
| 85 | * @paglen: the pagelength |
| 86 | * @td: search pattern descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 87 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 88 | * Check for a pattern at the given place. Used to search bad block tables and |
| 89 | * good / bad block identifiers. If the SCAN_EMPTY option is set then check, if |
| 90 | * all bytes except the pattern area contain 0xff. |
| 91 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 92 | 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] | 93 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 94 | int end = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 95 | uint8_t *p = buf; |
| 96 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 97 | if (td->options & NAND_BBT_NO_OOB) |
| 98 | return check_pattern_no_oob(buf, td); |
| 99 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 100 | end = paglen + td->offs; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 101 | if (td->options & NAND_BBT_SCANEMPTY) |
| 102 | if (memchr_inv(p, 0xff, end)) |
| 103 | return -1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 104 | p += end; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 105 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 106 | /* Compare the pattern */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 107 | if (memcmp(p, td->pattern, td->len)) |
| 108 | return -1; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 109 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 110 | if (td->options & NAND_BBT_SCANEMPTY) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 111 | p += td->len; |
| 112 | end += td->len; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 113 | if (memchr_inv(p, 0xff, len - end)) |
| 114 | return -1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 115 | } |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 120 | * check_short_pattern - [GENERIC] check if a pattern is in the buffer |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 121 | * @buf: the buffer to search |
| 122 | * @td: search pattern descriptor |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 123 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 124 | * Check for a pattern at the given place. Used to search bad block tables and |
| 125 | * good / bad block identifiers. Same as check_pattern, but no optional empty |
| 126 | * check. |
| 127 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 128 | static int check_short_pattern(uint8_t *buf, struct nand_bbt_descr *td) |
| 129 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 130 | /* Compare the pattern */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 131 | if (memcmp(buf + td->offs, td->pattern, td->len)) |
| 132 | return -1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 133 | return 0; |
| 134 | } |
| 135 | |
| 136 | /** |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 137 | * add_marker_len - compute the length of the marker in data area |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 138 | * @td: BBT descriptor used for computation |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 139 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 140 | * 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] | 141 | */ |
| 142 | static u32 add_marker_len(struct nand_bbt_descr *td) |
| 143 | { |
| 144 | u32 len; |
| 145 | |
| 146 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 147 | return 0; |
| 148 | |
| 149 | len = td->len; |
| 150 | if (td->options & NAND_BBT_VERSION) |
| 151 | len++; |
| 152 | return len; |
| 153 | } |
| 154 | |
| 155 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 156 | * read_bbt - [GENERIC] Read the bad block table starting from page |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 157 | * @mtd: MTD device structure |
| 158 | * @buf: temporary buffer |
| 159 | * @page: the starting page |
| 160 | * @num: the number of bbt descriptors to read |
| 161 | * @td: the bbt describtion table |
| 162 | * @offs: offset in the memory table |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 163 | * |
| 164 | * Read the bad block table starting from page. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 165 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 166 | 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] | 167 | struct nand_bbt_descr *td, int offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 168 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 169 | int res, ret = 0, i, j, act = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 170 | struct nand_chip *this = mtd->priv; |
| 171 | size_t retlen, len, totlen; |
| 172 | loff_t from; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 173 | int bits = td->options & NAND_BBT_NRBITS_MSK; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 174 | uint8_t msk = (uint8_t)((1 << bits) - 1); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 175 | u32 marker_len; |
| 176 | int reserved_block_code = td->reserved_block_code; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 177 | |
| 178 | totlen = (num * bits) >> 3; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 179 | marker_len = add_marker_len(td); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 180 | from = ((loff_t)page) << this->page_shift; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 181 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 182 | while (totlen) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 183 | len = min(totlen, (size_t)(1 << this->bbt_erase_shift)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 184 | if (marker_len) { |
| 185 | /* |
| 186 | * In case the BBT marker is not in the OOB area it |
| 187 | * will be just in the first page. |
| 188 | */ |
| 189 | len -= marker_len; |
| 190 | from += marker_len; |
| 191 | marker_len = 0; |
| 192 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 193 | res = mtd_read(mtd, from, len, &retlen, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 194 | if (res < 0) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 195 | if (mtd_is_eccerr(res)) { |
| 196 | pr_info("nand_bbt: ECC error in BBT at " |
| 197 | "0x%012llx\n", from & ~mtd->writesize); |
| 198 | return res; |
| 199 | } else if (mtd_is_bitflip(res)) { |
| 200 | pr_info("nand_bbt: corrected error in BBT at " |
| 201 | "0x%012llx\n", from & ~mtd->writesize); |
| 202 | ret = res; |
| 203 | } else { |
| 204 | pr_info("nand_bbt: error reading BBT\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 205 | return res; |
| 206 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 207 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 208 | |
| 209 | /* Analyse data */ |
| 210 | for (i = 0; i < len; i++) { |
| 211 | uint8_t dat = buf[i]; |
| 212 | for (j = 0; j < 8; j += bits, act += 2) { |
| 213 | uint8_t tmp = (dat >> j) & msk; |
| 214 | if (tmp == msk) |
| 215 | continue; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 216 | if (reserved_block_code && (tmp == reserved_block_code)) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 217 | pr_info("nand_read_bbt: reserved block at 0x%012llx\n", |
| 218 | (loff_t)((offs << 2) + (act >> 1)) << this->bbt_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 219 | this->bbt[offs + (act >> 3)] |= 0x2 << (act & 0x06); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 220 | mtd->ecc_stats.bbtblocks++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 221 | continue; |
| 222 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 223 | pr_info("nand_read_bbt: Bad block at 0x%012llx\n", |
Heiko Schocher | 435d351 | 2012-02-14 22:34:05 +0000 | [diff] [blame] | 224 | (loff_t)((offs << 2) + (act >> 1)) |
| 225 | << this->bbt_erase_shift); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 226 | /* Factory marked bad or worn out? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 227 | if (tmp == 0) |
| 228 | this->bbt[offs + (act >> 3)] |= 0x3 << (act & 0x06); |
| 229 | else |
| 230 | this->bbt[offs + (act >> 3)] |= 0x1 << (act & 0x06); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 231 | mtd->ecc_stats.badblocks++; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 232 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 233 | } |
| 234 | totlen -= len; |
| 235 | from += len; |
| 236 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 237 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | /** |
| 241 | * 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] | 242 | * @mtd: MTD device structure |
| 243 | * @buf: temporary buffer |
| 244 | * @td: descriptor for the bad block table |
| 245 | * @chip: read the table for a specific chip, -1 read all chips; applies only if |
| 246 | * NAND_BBT_PERCHIP option is set |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 247 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 248 | * Read the bad block table for all chips starting at a given page. We assume |
| 249 | * that the bbt bits are in consecutive order. |
| 250 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 251 | 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] | 252 | { |
| 253 | struct nand_chip *this = mtd->priv; |
| 254 | int res = 0, i; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 255 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 256 | if (td->options & NAND_BBT_PERCHIP) { |
| 257 | int offs = 0; |
| 258 | for (i = 0; i < this->numchips; i++) { |
| 259 | if (chip == -1 || chip == i) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 260 | res = read_bbt(mtd, buf, td->pages[i], |
| 261 | this->chipsize >> this->bbt_erase_shift, |
| 262 | td, offs); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 263 | if (res) |
| 264 | return res; |
| 265 | offs += this->chipsize >> (this->bbt_erase_shift + 2); |
| 266 | } |
| 267 | } else { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 268 | res = read_bbt(mtd, buf, td->pages[0], |
| 269 | mtd->size >> this->bbt_erase_shift, td, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 270 | if (res) |
| 271 | return res; |
| 272 | } |
| 273 | return 0; |
| 274 | } |
| 275 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 276 | /* BBT marker is in the first page, no OOB */ |
| 277 | 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] | 278 | struct nand_bbt_descr *td) |
| 279 | { |
| 280 | size_t retlen; |
| 281 | size_t len; |
| 282 | |
| 283 | len = td->len; |
| 284 | if (td->options & NAND_BBT_VERSION) |
| 285 | len++; |
| 286 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 287 | return mtd_read(mtd, offs, len, &retlen, buf); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 288 | } |
| 289 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 290 | /** |
| 291 | * scan_read_oob - [GENERIC] Scan data+OOB region to buffer |
| 292 | * @mtd: MTD device structure |
| 293 | * @buf: temporary buffer |
| 294 | * @offs: offset at which to scan |
| 295 | * @len: length of data region to read |
| 296 | * |
| 297 | * Scan read data from data+OOB. May traverse multiple pages, interleaving |
| 298 | * page,OOB,page,OOB,... in buf. Completes transfer and returns the "strongest" |
| 299 | * 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] | 300 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 301 | 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] | 302 | size_t len) |
| 303 | { |
| 304 | struct mtd_oob_ops ops; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 305 | int res, ret = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 306 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 307 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 308 | ops.ooboffs = 0; |
| 309 | ops.ooblen = mtd->oobsize; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 310 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 311 | while (len > 0) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 312 | ops.datbuf = buf; |
| 313 | ops.len = min(len, (size_t)mtd->writesize); |
| 314 | ops.oobbuf = buf + ops.len; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 315 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 316 | res = mtd_read_oob(mtd, offs, &ops); |
| 317 | if (res) { |
| 318 | if (!mtd_is_bitflip_or_eccerr(res)) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 319 | return res; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 320 | else if (mtd_is_eccerr(res) || !ret) |
| 321 | ret = res; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | buf += mtd->oobsize + mtd->writesize; |
| 325 | len -= mtd->writesize; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 326 | offs += mtd->writesize; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 327 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 328 | return ret; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 329 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 330 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 331 | 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] | 332 | size_t len, struct nand_bbt_descr *td) |
| 333 | { |
| 334 | if (td->options & NAND_BBT_NO_OOB) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 335 | return scan_read_data(mtd, buf, offs, td); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 336 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 337 | return scan_read_oob(mtd, buf, offs, len); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 338 | } |
| 339 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 340 | /* Scan write data with oob to flash */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 341 | static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len, |
| 342 | uint8_t *buf, uint8_t *oob) |
| 343 | { |
| 344 | struct mtd_oob_ops ops; |
| 345 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 346 | ops.mode = MTD_OPS_PLACE_OOB; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 347 | ops.ooboffs = 0; |
| 348 | ops.ooblen = mtd->oobsize; |
| 349 | ops.datbuf = buf; |
| 350 | ops.oobbuf = oob; |
| 351 | ops.len = len; |
| 352 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 353 | return mtd_write_oob(mtd, offs, &ops); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 354 | } |
| 355 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 356 | static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td) |
| 357 | { |
| 358 | u32 ver_offs = td->veroffs; |
| 359 | |
| 360 | if (!(td->options & NAND_BBT_NO_OOB)) |
| 361 | ver_offs += mtd->writesize; |
| 362 | return ver_offs; |
| 363 | } |
| 364 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 365 | /** |
| 366 | * 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] | 367 | * @mtd: MTD device structure |
| 368 | * @buf: temporary buffer |
| 369 | * @td: descriptor for the bad block table |
| 370 | * @md: descriptor for the bad block table mirror |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 371 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 372 | * Read the bad block table(s) for all chips starting at a given page. We |
| 373 | * assume that the bbt bits are in consecutive order. |
| 374 | */ |
| 375 | static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 376 | struct nand_bbt_descr *td, struct nand_bbt_descr *md) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 377 | { |
| 378 | struct nand_chip *this = mtd->priv; |
| 379 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 380 | /* Read the primary version, if available */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 381 | if (td->options & NAND_BBT_VERSION) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 382 | scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 383 | mtd->writesize, td); |
| 384 | td->version[0] = buf[bbt_get_ver_offs(mtd, td)]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 385 | pr_info("Bad block table at page %d, version 0x%02X\n", |
| 386 | td->pages[0], td->version[0]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 387 | } |
| 388 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 389 | /* Read the mirror version, if available */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 390 | if (md && (md->options & NAND_BBT_VERSION)) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 391 | scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift, |
| 392 | mtd->writesize, md); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 393 | md->version[0] = buf[bbt_get_ver_offs(mtd, md)]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 394 | pr_info("Bad block table at page %d, version 0x%02X\n", |
| 395 | md->pages[0], md->version[0]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 396 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 397 | } |
| 398 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 399 | /* Scan a given block full */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 400 | static int scan_block_full(struct mtd_info *mtd, struct nand_bbt_descr *bd, |
| 401 | loff_t offs, uint8_t *buf, size_t readlen, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 402 | int scanlen, int numpages) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 403 | { |
| 404 | int ret, j; |
| 405 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 406 | ret = scan_read_oob(mtd, buf, offs, readlen); |
| 407 | /* Ignore ECC errors when checking for BBM */ |
| 408 | if (ret && !mtd_is_bitflip_or_eccerr(ret)) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 409 | return ret; |
| 410 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 411 | for (j = 0; j < numpages; j++, buf += scanlen) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 412 | if (check_pattern(buf, scanlen, mtd->writesize, bd)) |
| 413 | return 1; |
| 414 | } |
| 415 | return 0; |
| 416 | } |
| 417 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 418 | /* Scan a given block partially */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 419 | 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] | 420 | loff_t offs, uint8_t *buf, int numpages) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 421 | { |
| 422 | struct mtd_oob_ops ops; |
| 423 | int j, ret; |
| 424 | |
| 425 | ops.ooblen = mtd->oobsize; |
| 426 | ops.oobbuf = buf; |
| 427 | ops.ooboffs = 0; |
| 428 | ops.datbuf = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 429 | ops.mode = MTD_OPS_PLACE_OOB; |
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 | for (j = 0; j < numpages; j++) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 432 | /* |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 433 | * Read the full oob until read_oob is fixed to handle single |
| 434 | * byte reads for 16 bit buswidth. |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 435 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 436 | ret = mtd_read_oob(mtd, offs, &ops); |
| 437 | /* Ignore ECC errors when checking for BBM */ |
| 438 | if (ret && !mtd_is_bitflip_or_eccerr(ret)) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 439 | return ret; |
| 440 | |
| 441 | if (check_short_pattern(buf, bd)) |
| 442 | return 1; |
| 443 | |
| 444 | offs += mtd->writesize; |
| 445 | } |
| 446 | return 0; |
| 447 | } |
| 448 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 449 | /** |
| 450 | * create_bbt - [GENERIC] Create a bad block table by scanning the device |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 451 | * @mtd: MTD device structure |
| 452 | * @buf: temporary buffer |
| 453 | * @bd: descriptor for the good/bad block search pattern |
| 454 | * @chip: create the table for a specific chip, -1 read all chips; applies only |
| 455 | * if NAND_BBT_PERCHIP option is set |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 456 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 457 | * Create a bad block table by scanning the device for the given good/bad block |
| 458 | * identify pattern. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 459 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 460 | static int create_bbt(struct mtd_info *mtd, uint8_t *buf, |
| 461 | struct nand_bbt_descr *bd, int chip) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 462 | { |
| 463 | struct nand_chip *this = mtd->priv; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 464 | int i, numblocks, numpages, scanlen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 465 | int startblock; |
| 466 | loff_t from; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 467 | size_t readlen; |
| 468 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 469 | pr_info("Scanning device for bad blocks\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 470 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 471 | if (bd->options & NAND_BBT_SCANALLPAGES) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 472 | numpages = 1 << (this->bbt_erase_shift - this->page_shift); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 473 | else if (bd->options & NAND_BBT_SCAN2NDPAGE) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 474 | numpages = 2; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 475 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 476 | numpages = 1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 477 | |
| 478 | if (!(bd->options & NAND_BBT_SCANEMPTY)) { |
| 479 | /* We need only read few bytes from the OOB area */ |
| 480 | scanlen = 0; |
| 481 | readlen = bd->len; |
| 482 | } else { |
| 483 | /* Full page content should be read */ |
| 484 | scanlen = mtd->writesize + mtd->oobsize; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 485 | readlen = numpages * mtd->writesize; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 486 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 487 | |
| 488 | if (chip == -1) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 489 | /* |
| 490 | * Note that numblocks is 2 * (real numblocks) here, see i+=2 |
| 491 | * below as it makes shifting and masking less painful |
| 492 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 493 | numblocks = mtd->size >> (this->bbt_erase_shift - 1); |
| 494 | startblock = 0; |
| 495 | from = 0; |
| 496 | } else { |
| 497 | if (chip >= this->numchips) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 498 | pr_warn("create_bbt(): chipnr (%d) > available chips (%d)\n", |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 499 | chip + 1, this->numchips); |
| 500 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 501 | } |
| 502 | numblocks = this->chipsize >> (this->bbt_erase_shift - 1); |
| 503 | startblock = chip * numblocks; |
| 504 | numblocks += startblock; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 505 | from = (loff_t)startblock << (this->bbt_erase_shift - 1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 506 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 507 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 508 | if (this->bbt_options & NAND_BBT_SCANLASTPAGE) |
| 509 | from += mtd->erasesize - (mtd->writesize * numpages); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 510 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 511 | for (i = startblock; i < numblocks;) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 512 | int ret; |
| 513 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 514 | BUG_ON(bd->options & NAND_BBT_NO_OOB); |
| 515 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 516 | if (bd->options & NAND_BBT_SCANALLPAGES) |
| 517 | ret = scan_block_full(mtd, bd, from, buf, readlen, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 518 | scanlen, numpages); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 519 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 520 | ret = scan_block_fast(mtd, bd, from, buf, numpages); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 521 | |
| 522 | if (ret < 0) |
| 523 | return ret; |
| 524 | |
| 525 | if (ret) { |
| 526 | this->bbt[i >> 3] |= 0x03 << (i & 0x6); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 527 | pr_warn("Bad eraseblock %d at 0x%012llx\n", |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 528 | i >> 1, (unsigned long long)from); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 529 | mtd->ecc_stats.badblocks++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 530 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 531 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 532 | i += 2; |
| 533 | from += (1 << this->bbt_erase_shift); |
| 534 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 535 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 536 | } |
| 537 | |
| 538 | /** |
| 539 | * search_bbt - [GENERIC] scan the device for a specific bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 540 | * @mtd: MTD device structure |
| 541 | * @buf: temporary buffer |
| 542 | * @td: descriptor for the bad block table |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 543 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 544 | * Read the bad block table by searching for a given ident pattern. Search is |
| 545 | * preformed either from the beginning up or from the end of the device |
| 546 | * downwards. The search starts always at the start of a block. If the option |
| 547 | * NAND_BBT_PERCHIP is given, each chip is searched for a bbt, which contains |
| 548 | * the bad block information of this chip. This is necessary to provide support |
| 549 | * for certain DOC devices. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 550 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 551 | * 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] | 552 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 553 | 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] | 554 | { |
| 555 | struct nand_chip *this = mtd->priv; |
| 556 | int i, chips; |
Marek Vasut | 15324ad | 2011-09-30 12:13:22 +0200 | [diff] [blame] | 557 | int startblock, block, dir; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 558 | int scanlen = mtd->writesize + mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 559 | int bbtblocks; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 560 | int blocktopage = this->bbt_erase_shift - this->page_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 561 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 562 | /* Search direction top -> down? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 563 | if (td->options & NAND_BBT_LASTBLOCK) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 564 | startblock = (mtd->size >> this->bbt_erase_shift) - 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 565 | dir = -1; |
| 566 | } else { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 567 | startblock = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 568 | dir = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 569 | } |
| 570 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 571 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 572 | if (td->options & NAND_BBT_PERCHIP) { |
| 573 | chips = this->numchips; |
| 574 | bbtblocks = this->chipsize >> this->bbt_erase_shift; |
| 575 | startblock &= bbtblocks - 1; |
| 576 | } else { |
| 577 | chips = 1; |
| 578 | bbtblocks = mtd->size >> this->bbt_erase_shift; |
| 579 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 580 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 581 | for (i = 0; i < chips; i++) { |
| 582 | /* Reset version information */ |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 583 | td->version[i] = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 584 | td->pages[i] = -1; |
| 585 | /* Scan the maximum number of blocks */ |
| 586 | for (block = 0; block < td->maxblocks; block++) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 587 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 588 | int actblock = startblock + dir * block; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 589 | loff_t offs = (loff_t)actblock << this->bbt_erase_shift; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 590 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 591 | /* Read first page */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 592 | scan_read(mtd, buf, offs, mtd->writesize, td); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 593 | if (!check_pattern(buf, scanlen, mtd->writesize, td)) { |
| 594 | td->pages[i] = actblock << blocktopage; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 595 | if (td->options & NAND_BBT_VERSION) { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 596 | offs = bbt_get_ver_offs(mtd, td); |
| 597 | td->version[i] = buf[offs]; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 598 | } |
| 599 | break; |
| 600 | } |
| 601 | } |
| 602 | startblock += this->chipsize >> this->bbt_erase_shift; |
| 603 | } |
| 604 | /* Check, if we found a bbt for each requested chip */ |
| 605 | for (i = 0; i < chips; i++) { |
| 606 | if (td->pages[i] == -1) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 607 | pr_warn("Bad block table not found for chip %d\n", i); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 608 | else |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 609 | pr_info("Bad block table found at page %d, version 0x%02X\n", td->pages[i], |
Heiko Schocher | 435d351 | 2012-02-14 22:34:05 +0000 | [diff] [blame] | 610 | td->version[i]); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 611 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 612 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 613 | } |
| 614 | |
| 615 | /** |
| 616 | * search_read_bbts - [GENERIC] scan the device for bad block table(s) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 617 | * @mtd: MTD device structure |
| 618 | * @buf: temporary buffer |
| 619 | * @td: descriptor for the bad block table |
| 620 | * @md: descriptor for the bad block table mirror |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 621 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 622 | * Search and read the bad block table(s). |
| 623 | */ |
| 624 | static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf, |
| 625 | struct nand_bbt_descr *td, |
| 626 | struct nand_bbt_descr *md) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 627 | { |
| 628 | /* Search the primary table */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 629 | search_bbt(mtd, buf, td); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 630 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 631 | /* Search the mirror table */ |
| 632 | if (md) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 633 | search_bbt(mtd, buf, md); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 634 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 635 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 636 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 637 | * write_bbt - [GENERIC] (Re)write the bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 638 | * @mtd: MTD device structure |
| 639 | * @buf: temporary buffer |
| 640 | * @td: descriptor for the bad block table |
| 641 | * @md: descriptor for the bad block table mirror |
| 642 | * @chipsel: selector for a specific chip, -1 for all |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 643 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 644 | * (Re)write the bad block table. |
| 645 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 646 | static int write_bbt(struct mtd_info *mtd, uint8_t *buf, |
| 647 | struct nand_bbt_descr *td, struct nand_bbt_descr *md, |
| 648 | int chipsel) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 649 | { |
| 650 | struct nand_chip *this = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 651 | struct erase_info einfo; |
| 652 | int i, j, res, chip = 0; |
| 653 | int bits, startblock, dir, page, offs, numblocks, sft, sftmsk; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 654 | int nrchips, bbtoffs, pageoffs, ooboffs; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 655 | uint8_t msk[4]; |
| 656 | uint8_t rcode = td->reserved_block_code; |
| 657 | size_t retlen, len = 0; |
| 658 | loff_t to; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 659 | struct mtd_oob_ops ops; |
| 660 | |
| 661 | ops.ooblen = mtd->oobsize; |
| 662 | ops.ooboffs = 0; |
| 663 | ops.datbuf = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 664 | ops.mode = MTD_OPS_PLACE_OOB; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 665 | |
| 666 | if (!rcode) |
| 667 | rcode = 0xff; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 668 | /* Write bad block table per chip rather than per device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 669 | if (td->options & NAND_BBT_PERCHIP) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 670 | numblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 671 | /* Full device write or specific chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 672 | if (chipsel == -1) { |
| 673 | nrchips = this->numchips; |
| 674 | } else { |
| 675 | nrchips = chipsel + 1; |
| 676 | chip = chipsel; |
| 677 | } |
| 678 | } else { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 679 | numblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 680 | nrchips = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 681 | } |
| 682 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 683 | /* Loop through the chips */ |
| 684 | for (; chip < nrchips; chip++) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 685 | /* |
| 686 | * There was already a version of the table, reuse the page |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 687 | * This applies for absolute placement too, as we have the |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 688 | * page nr. in td->pages. |
| 689 | */ |
| 690 | if (td->pages[chip] != -1) { |
| 691 | page = td->pages[chip]; |
| 692 | goto write; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 693 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 694 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 695 | /* |
| 696 | * Automatic placement of the bad block table. Search direction |
| 697 | * top -> down? |
| 698 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 699 | if (td->options & NAND_BBT_LASTBLOCK) { |
| 700 | startblock = numblocks * (chip + 1) - 1; |
| 701 | dir = -1; |
| 702 | } else { |
| 703 | startblock = chip * numblocks; |
| 704 | dir = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 705 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 706 | |
| 707 | for (i = 0; i < td->maxblocks; i++) { |
| 708 | int block = startblock + dir * i; |
| 709 | /* Check, if the block is bad */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 710 | switch ((this->bbt[block >> 2] >> |
| 711 | (2 * (block & 0x03))) & 0x03) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 712 | case 0x01: |
| 713 | case 0x03: |
| 714 | continue; |
| 715 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 716 | page = block << |
| 717 | (this->bbt_erase_shift - this->page_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 718 | /* Check, if the block is used by the mirror table */ |
| 719 | if (!md || md->pages[chip] != page) |
| 720 | goto write; |
| 721 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 722 | pr_err("No space left to write bad block table\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 723 | return -ENOSPC; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 724 | write: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 725 | |
| 726 | /* Set up shift count and masks for the flash table */ |
| 727 | bits = td->options & NAND_BBT_NRBITS_MSK; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 728 | msk[2] = ~rcode; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 729 | switch (bits) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 730 | case 1: sft = 3; sftmsk = 0x07; msk[0] = 0x00; msk[1] = 0x01; |
| 731 | msk[3] = 0x01; |
| 732 | break; |
| 733 | case 2: sft = 2; sftmsk = 0x06; msk[0] = 0x00; msk[1] = 0x01; |
| 734 | msk[3] = 0x03; |
| 735 | break; |
| 736 | case 4: sft = 1; sftmsk = 0x04; msk[0] = 0x00; msk[1] = 0x0C; |
| 737 | msk[3] = 0x0f; |
| 738 | break; |
| 739 | case 8: sft = 0; sftmsk = 0x00; msk[0] = 0x00; msk[1] = 0x0F; |
| 740 | msk[3] = 0xff; |
| 741 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 742 | default: return -EINVAL; |
| 743 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 744 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 745 | bbtoffs = chip * (numblocks >> 2); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 746 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 747 | to = ((loff_t)page) << this->page_shift; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 748 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 749 | /* Must we save the block contents? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 750 | if (td->options & NAND_BBT_SAVECONTENT) { |
| 751 | /* Make it block aligned */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 752 | to &= ~((loff_t)((1 << this->bbt_erase_shift) - 1)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 753 | len = 1 << this->bbt_erase_shift; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 754 | res = mtd_read(mtd, to, len, &retlen, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 755 | if (res < 0) { |
| 756 | if (retlen != len) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 757 | pr_info("nand_bbt: error reading block " |
| 758 | "for writing the bad block table\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 759 | return res; |
| 760 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 761 | pr_warn("nand_bbt: ECC error while reading " |
| 762 | "block for writing bad block table\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 763 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 764 | /* Read oob data */ |
| 765 | ops.ooblen = (len >> this->page_shift) * mtd->oobsize; |
| 766 | ops.oobbuf = &buf[len]; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 767 | res = mtd_read_oob(mtd, to + mtd->writesize, &ops); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 768 | if (res < 0 || ops.oobretlen != ops.ooblen) |
| 769 | goto outerr; |
| 770 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 771 | /* Calc the byte offset in the buffer */ |
| 772 | pageoffs = page - (int)(to >> this->page_shift); |
| 773 | offs = pageoffs << this->page_shift; |
| 774 | /* Preset the bbt area with 0xff */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 775 | memset(&buf[offs], 0xff, (size_t)(numblocks >> sft)); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 776 | ooboffs = len + (pageoffs * mtd->oobsize); |
| 777 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 778 | } else if (td->options & NAND_BBT_NO_OOB) { |
| 779 | ooboffs = 0; |
| 780 | offs = td->len; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 781 | /* The version byte */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 782 | if (td->options & NAND_BBT_VERSION) |
| 783 | offs++; |
| 784 | /* Calc length */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 785 | len = (size_t)(numblocks >> sft); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 786 | len += offs; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 787 | /* Make it page aligned! */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 788 | len = ALIGN(len, mtd->writesize); |
| 789 | /* Preset the buffer with 0xff */ |
| 790 | memset(buf, 0xff, len); |
| 791 | /* Pattern is located at the begin of first page */ |
| 792 | memcpy(buf, td->pattern, td->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 793 | } else { |
| 794 | /* Calc length */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 795 | len = (size_t)(numblocks >> sft); |
| 796 | /* Make it page aligned! */ |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 797 | len = ALIGN(len, mtd->writesize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 798 | /* Preset the buffer with 0xff */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 799 | memset(buf, 0xff, len + |
| 800 | (len >> this->page_shift)* mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 801 | offs = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 802 | ooboffs = len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 803 | /* Pattern is located in oob area of first page */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 804 | memcpy(&buf[ooboffs + td->offs], td->pattern, td->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 805 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 806 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 807 | if (td->options & NAND_BBT_VERSION) |
| 808 | buf[ooboffs + td->veroffs] = td->version[chip]; |
| 809 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 810 | /* Walk through the memory table */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 811 | for (i = 0; i < numblocks;) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 812 | uint8_t dat; |
| 813 | dat = this->bbt[bbtoffs + (i >> 2)]; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 814 | for (j = 0; j < 4; j++, i++) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 815 | int sftcnt = (i << (3 - sft)) & sftmsk; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 816 | /* Do not store the reserved bbt blocks! */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 817 | buf[offs + (i >> sft)] &= |
| 818 | ~(msk[dat & 0x03] << sftcnt); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 819 | dat >>= 2; |
| 820 | } |
| 821 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 822 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 823 | memset(&einfo, 0, sizeof(einfo)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 824 | einfo.mtd = mtd; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 825 | einfo.addr = to; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 826 | einfo.len = 1 << this->bbt_erase_shift; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 827 | res = nand_erase_nand(mtd, &einfo, 1); |
| 828 | if (res < 0) |
| 829 | goto outerr; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 830 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 831 | res = scan_write_bbt(mtd, to, len, buf, |
| 832 | td->options & NAND_BBT_NO_OOB ? NULL : |
| 833 | &buf[len]); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 834 | if (res < 0) |
| 835 | goto outerr; |
| 836 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 837 | pr_info("Bad block table written to 0x%012llx, version 0x%02X\n", |
| 838 | (unsigned long long)to, td->version[chip]); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 839 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 840 | /* Mark it as used */ |
| 841 | td->pages[chip] = page; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 842 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 843 | return 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 844 | |
| 845 | outerr: |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 846 | 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] | 847 | return res; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | /** |
| 851 | * nand_memory_bbt - [GENERIC] create a memory based bad block table |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 852 | * @mtd: MTD device structure |
| 853 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 854 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 855 | * The function creates a memory based bbt by scanning the device for |
| 856 | * manufacturer / software marked good / bad blocks. |
| 857 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 858 | 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] | 859 | { |
| 860 | struct nand_chip *this = mtd->priv; |
| 861 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 862 | bd->options &= ~NAND_BBT_SCANEMPTY; |
| 863 | return create_bbt(mtd, this->buffers->databuf, bd, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 864 | } |
| 865 | |
| 866 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 867 | * check_create - [GENERIC] create and write bbt(s) if necessary |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 868 | * @mtd: MTD device structure |
| 869 | * @buf: temporary buffer |
| 870 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 871 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 872 | * The function checks the results of the previous call to read_bbt and creates |
| 873 | * / updates the bbt(s) if necessary. Creation is necessary if no bbt was found |
| 874 | * for the chip/device. Update is necessary if one of the tables is missing or |
| 875 | * the version nr. of one table is less than the other. |
| 876 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 877 | 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] | 878 | { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 879 | int i, chips, writeops, create, chipsel, res, res2; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 880 | struct nand_chip *this = mtd->priv; |
| 881 | struct nand_bbt_descr *td = this->bbt_td; |
| 882 | struct nand_bbt_descr *md = this->bbt_md; |
| 883 | struct nand_bbt_descr *rd, *rd2; |
| 884 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 885 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 886 | if (td->options & NAND_BBT_PERCHIP) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 887 | chips = this->numchips; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 888 | else |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 889 | chips = 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 890 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 891 | for (i = 0; i < chips; i++) { |
| 892 | writeops = 0; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 893 | create = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 894 | rd = NULL; |
| 895 | rd2 = NULL; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 896 | res = res2 = 0; |
| 897 | /* Per chip or per device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 898 | chipsel = (td->options & NAND_BBT_PERCHIP) ? i : -1; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 899 | /* Mirrored table available? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 900 | if (md) { |
| 901 | if (td->pages[i] == -1 && md->pages[i] == -1) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 902 | create = 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 903 | writeops = 0x03; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 904 | } else if (td->pages[i] == -1) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 905 | rd = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 906 | writeops = 0x01; |
| 907 | } else if (md->pages[i] == -1) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 908 | rd = td; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 909 | writeops = 0x02; |
| 910 | } else if (td->version[i] == md->version[i]) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 911 | rd = td; |
| 912 | if (!(td->options & NAND_BBT_VERSION)) |
| 913 | rd2 = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 914 | } else if (((int8_t)(td->version[i] - md->version[i])) > 0) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 915 | rd = td; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 916 | writeops = 0x02; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 917 | } else { |
| 918 | rd = md; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 919 | writeops = 0x01; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 920 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 921 | } else { |
| 922 | if (td->pages[i] == -1) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 923 | create = 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 924 | writeops = 0x01; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 925 | } else { |
| 926 | rd = td; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 927 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 928 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 929 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 930 | if (create) { |
| 931 | /* Create the bad block table by scanning the device? */ |
| 932 | if (!(td->options & NAND_BBT_CREATE)) |
| 933 | continue; |
| 934 | |
| 935 | /* Create the table in memory by scanning the chip(s) */ |
| 936 | if (!(this->bbt_options & NAND_BBT_CREATE_EMPTY)) |
| 937 | create_bbt(mtd, buf, bd, chipsel); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 938 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 939 | td->version[i] = 1; |
| 940 | if (md) |
| 941 | md->version[i] = 1; |
| 942 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 943 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 944 | /* Read back first? */ |
| 945 | if (rd) { |
| 946 | res = read_abs_bbt(mtd, buf, rd, chipsel); |
| 947 | if (mtd_is_eccerr(res)) { |
| 948 | /* Mark table as invalid */ |
| 949 | rd->pages[i] = -1; |
| 950 | rd->version[i] = 0; |
| 951 | i--; |
| 952 | continue; |
| 953 | } |
| 954 | } |
| 955 | /* If they weren't versioned, read both */ |
| 956 | if (rd2) { |
| 957 | res2 = read_abs_bbt(mtd, buf, rd2, chipsel); |
| 958 | if (mtd_is_eccerr(res2)) { |
| 959 | /* Mark table as invalid */ |
| 960 | rd2->pages[i] = -1; |
| 961 | rd2->version[i] = 0; |
| 962 | i--; |
| 963 | continue; |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | /* Scrub the flash table(s)? */ |
| 968 | if (mtd_is_bitflip(res) || mtd_is_bitflip(res2)) |
| 969 | writeops = 0x03; |
| 970 | |
| 971 | /* Update version numbers before writing */ |
| 972 | if (md) { |
| 973 | td->version[i] = max(td->version[i], md->version[i]); |
| 974 | md->version[i] = td->version[i]; |
| 975 | } |
| 976 | |
| 977 | /* Write the bad block table to the device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 978 | if ((writeops & 0x01) && (td->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 979 | res = write_bbt(mtd, buf, td, md, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 980 | if (res < 0) |
| 981 | return res; |
| 982 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 983 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 984 | /* Write the mirror bad block table to the device? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 985 | if ((writeops & 0x02) && md && (md->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 986 | res = write_bbt(mtd, buf, md, td, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 987 | if (res < 0) |
| 988 | return res; |
| 989 | } |
| 990 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 991 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 995 | * mark_bbt_regions - [GENERIC] mark the bad block table regions |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 996 | * @mtd: MTD device structure |
| 997 | * @td: bad block table descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 998 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 999 | * The bad block table regions are marked as "bad" to prevent accidental |
| 1000 | * erasures / writes. The regions are identified by the mark 0x02. |
| 1001 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1002 | 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] | 1003 | { |
| 1004 | struct nand_chip *this = mtd->priv; |
| 1005 | int i, j, chips, block, nrblocks, update; |
| 1006 | uint8_t oldval, newval; |
| 1007 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1008 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1009 | if (td->options & NAND_BBT_PERCHIP) { |
| 1010 | chips = this->numchips; |
| 1011 | nrblocks = (int)(this->chipsize >> this->bbt_erase_shift); |
| 1012 | } else { |
| 1013 | chips = 1; |
| 1014 | nrblocks = (int)(mtd->size >> this->bbt_erase_shift); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1015 | } |
| 1016 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1017 | for (i = 0; i < chips; i++) { |
| 1018 | if ((td->options & NAND_BBT_ABSPAGE) || |
| 1019 | !(td->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1020 | if (td->pages[i] == -1) |
| 1021 | continue; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1022 | block = td->pages[i] >> (this->bbt_erase_shift - this->page_shift); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1023 | block <<= 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1024 | oldval = this->bbt[(block >> 3)]; |
| 1025 | newval = oldval | (0x2 << (block & 0x06)); |
| 1026 | this->bbt[(block >> 3)] = newval; |
| 1027 | if ((oldval != newval) && td->reserved_block_code) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1028 | nand_update_bbt(mtd, (loff_t)block << (this->bbt_erase_shift - 1)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1029 | continue; |
| 1030 | } |
| 1031 | update = 0; |
| 1032 | if (td->options & NAND_BBT_LASTBLOCK) |
| 1033 | block = ((i + 1) * nrblocks) - td->maxblocks; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1034 | else |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1035 | block = i * nrblocks; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1036 | block <<= 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1037 | for (j = 0; j < td->maxblocks; j++) { |
| 1038 | oldval = this->bbt[(block >> 3)]; |
| 1039 | newval = oldval | (0x2 << (block & 0x06)); |
| 1040 | this->bbt[(block >> 3)] = newval; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1041 | if (oldval != newval) |
| 1042 | update = 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1043 | block += 2; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1044 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1045 | /* |
| 1046 | * If we want reserved blocks to be recorded to flash, and some |
| 1047 | * new ones have been marked, then we need to update the stored |
| 1048 | * bbts. This should only happen once. |
| 1049 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1050 | if (update && td->reserved_block_code) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1051 | nand_update_bbt(mtd, (loff_t)(block - 2) << (this->bbt_erase_shift - 1)); |
| 1052 | } |
| 1053 | } |
| 1054 | |
| 1055 | /** |
| 1056 | * verify_bbt_descr - verify the bad block description |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1057 | * @mtd: MTD device structure |
| 1058 | * @bd: the table to verify |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1059 | * |
| 1060 | * This functions performs a few sanity checks on the bad block description |
| 1061 | * table. |
| 1062 | */ |
| 1063 | static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) |
| 1064 | { |
| 1065 | struct nand_chip *this = mtd->priv; |
| 1066 | u32 pattern_len; |
| 1067 | u32 bits; |
| 1068 | u32 table_size; |
| 1069 | |
| 1070 | if (!bd) |
| 1071 | return; |
| 1072 | |
| 1073 | pattern_len = bd->len; |
| 1074 | bits = bd->options & NAND_BBT_NRBITS_MSK; |
| 1075 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1076 | BUG_ON((this->bbt_options & NAND_BBT_NO_OOB) && |
| 1077 | !(this->bbt_options & NAND_BBT_USE_FLASH)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1078 | BUG_ON(!bits); |
| 1079 | |
| 1080 | if (bd->options & NAND_BBT_VERSION) |
| 1081 | pattern_len++; |
| 1082 | |
| 1083 | if (bd->options & NAND_BBT_NO_OOB) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1084 | BUG_ON(!(this->bbt_options & NAND_BBT_USE_FLASH)); |
| 1085 | BUG_ON(!(this->bbt_options & NAND_BBT_NO_OOB)); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1086 | BUG_ON(bd->offs); |
| 1087 | if (bd->options & NAND_BBT_VERSION) |
| 1088 | BUG_ON(bd->veroffs != bd->len); |
| 1089 | BUG_ON(bd->options & NAND_BBT_SAVECONTENT); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1090 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1091 | |
| 1092 | if (bd->options & NAND_BBT_PERCHIP) |
| 1093 | table_size = this->chipsize >> this->bbt_erase_shift; |
| 1094 | else |
| 1095 | table_size = mtd->size >> this->bbt_erase_shift; |
| 1096 | table_size >>= 3; |
| 1097 | table_size *= bits; |
| 1098 | if (bd->options & NAND_BBT_NO_OOB) |
| 1099 | table_size += pattern_len; |
| 1100 | BUG_ON(table_size > (1 << this->bbt_erase_shift)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1101 | } |
| 1102 | |
| 1103 | /** |
| 1104 | * 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] | 1105 | * @mtd: MTD device structure |
| 1106 | * @bd: descriptor for the good/bad block search pattern |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1107 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1108 | * The function checks, if a bad block table(s) is/are already available. If |
| 1109 | * not it scans the device for manufacturer marked good / bad blocks and writes |
| 1110 | * the bad block table(s) to the selected place. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1111 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1112 | * The bad block table memory is allocated here. It must be freed by calling |
| 1113 | * the nand_free_bbt function. |
| 1114 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1115 | 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] | 1116 | { |
| 1117 | struct nand_chip *this = mtd->priv; |
| 1118 | int len, res = 0; |
| 1119 | uint8_t *buf; |
| 1120 | struct nand_bbt_descr *td = this->bbt_td; |
| 1121 | struct nand_bbt_descr *md = this->bbt_md; |
| 1122 | |
| 1123 | len = mtd->size >> (this->bbt_erase_shift + 2); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1124 | /* |
| 1125 | * Allocate memory (2bit per block) and clear the memory bad block |
| 1126 | * table. |
| 1127 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1128 | this->bbt = kzalloc(len, GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1129 | if (!this->bbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1130 | return -ENOMEM; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1131 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1132 | /* |
| 1133 | * If no primary table decriptor is given, scan the device to build a |
| 1134 | * memory based bad block table. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1135 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1136 | if (!td) { |
| 1137 | if ((res = nand_memory_bbt(mtd, bd))) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1138 | pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n"); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1139 | kfree(this->bbt); |
| 1140 | this->bbt = NULL; |
| 1141 | } |
| 1142 | return res; |
| 1143 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1144 | verify_bbt_descr(mtd, td); |
| 1145 | verify_bbt_descr(mtd, md); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1146 | |
| 1147 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1148 | len = (1 << this->bbt_erase_shift); |
| 1149 | len += (len >> this->page_shift) * mtd->oobsize; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1150 | buf = vmalloc(len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1151 | if (!buf) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1152 | kfree(this->bbt); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1153 | this->bbt = NULL; |
| 1154 | return -ENOMEM; |
| 1155 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1156 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1157 | /* Is the bbt at a given page? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1158 | if (td->options & NAND_BBT_ABSPAGE) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1159 | read_abs_bbts(mtd, buf, td, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1160 | } else { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1161 | /* Search the bad block table using a pattern in oob */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1162 | search_read_bbts(mtd, buf, td, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1163 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1164 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1165 | res = check_create(mtd, buf, bd); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1166 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1167 | /* Prevent the bbt regions from erasing / writing */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1168 | mark_bbt_region(mtd, td); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1169 | if (md) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1170 | mark_bbt_region(mtd, md); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1171 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1172 | vfree(buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1173 | return res; |
| 1174 | } |
| 1175 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1176 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1177 | * nand_update_bbt - [NAND Interface] update bad block table(s) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1178 | * @mtd: MTD device structure |
| 1179 | * @offs: the offset of the newly marked block |
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 | * The function updates the bad block table(s). |
| 1182 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1183 | int nand_update_bbt(struct mtd_info *mtd, loff_t offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1184 | { |
| 1185 | struct nand_chip *this = mtd->priv; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1186 | int len, res = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1187 | int chip, chipsel; |
| 1188 | uint8_t *buf; |
| 1189 | struct nand_bbt_descr *td = this->bbt_td; |
| 1190 | struct nand_bbt_descr *md = this->bbt_md; |
| 1191 | |
| 1192 | if (!this->bbt || !td) |
| 1193 | return -EINVAL; |
| 1194 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1195 | /* Allocate a temporary buffer for one eraseblock incl. oob */ |
| 1196 | len = (1 << this->bbt_erase_shift); |
| 1197 | len += (len >> this->page_shift) * mtd->oobsize; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1198 | buf = kmalloc(len, GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1199 | if (!buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1200 | return -ENOMEM; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1201 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1202 | /* Do we have a bbt per chip? */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1203 | if (td->options & NAND_BBT_PERCHIP) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1204 | chip = (int)(offs >> this->chip_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1205 | chipsel = chip; |
| 1206 | } else { |
| 1207 | chip = 0; |
| 1208 | chipsel = -1; |
| 1209 | } |
| 1210 | |
| 1211 | td->version[chip]++; |
| 1212 | if (md) |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1213 | md->version[chip]++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1214 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1215 | /* Write the bad block table to the device? */ |
| 1216 | if (td->options & NAND_BBT_WRITE) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1217 | res = write_bbt(mtd, buf, td, md, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1218 | if (res < 0) |
| 1219 | goto out; |
| 1220 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1221 | /* Write the mirror bad block table to the device? */ |
| 1222 | if (md && (md->options & NAND_BBT_WRITE)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1223 | res = write_bbt(mtd, buf, md, td, chipsel); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1224 | } |
| 1225 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1226 | out: |
| 1227 | kfree(buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1228 | return res; |
| 1229 | } |
| 1230 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1231 | /* |
| 1232 | * Define some generic bad / good block scan pattern which are used |
| 1233 | * while scanning a device for factory marked good / bad blocks. |
| 1234 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1235 | static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; |
| 1236 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1237 | static uint8_t scan_agand_pattern[] = { 0x1C, 0x71, 0xC7, 0x1C, 0x71, 0xC7 }; |
| 1238 | |
| 1239 | static struct nand_bbt_descr agand_flashbased = { |
| 1240 | .options = NAND_BBT_SCANEMPTY | NAND_BBT_SCANALLPAGES, |
| 1241 | .offs = 0x20, |
| 1242 | .len = 6, |
| 1243 | .pattern = scan_agand_pattern |
| 1244 | }; |
| 1245 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1246 | /* Generic flash bbt descriptors */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1247 | static uint8_t bbt_pattern[] = {'B', 'b', 't', '0' }; |
| 1248 | static uint8_t mirror_pattern[] = {'1', 't', 'b', 'B' }; |
| 1249 | |
| 1250 | static struct nand_bbt_descr bbt_main_descr = { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1251 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1252 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1253 | .offs = 8, |
| 1254 | .len = 4, |
| 1255 | .veroffs = 12, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1256 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1257 | .pattern = bbt_pattern |
| 1258 | }; |
| 1259 | |
| 1260 | static struct nand_bbt_descr bbt_mirror_descr = { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1261 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1262 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, |
| 1263 | .offs = 8, |
| 1264 | .len = 4, |
| 1265 | .veroffs = 12, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1266 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1267 | .pattern = mirror_pattern |
| 1268 | }; |
| 1269 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1270 | static struct nand_bbt_descr bbt_main_no_oob_descr = { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1271 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1272 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1273 | | NAND_BBT_NO_OOB, |
| 1274 | .len = 4, |
| 1275 | .veroffs = 4, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1276 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1277 | .pattern = bbt_pattern |
| 1278 | }; |
| 1279 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1280 | static struct nand_bbt_descr bbt_mirror_no_oob_descr = { |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1281 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
| 1282 | | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP |
| 1283 | | NAND_BBT_NO_OOB, |
| 1284 | .len = 4, |
| 1285 | .veroffs = 4, |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1286 | .maxblocks = NAND_BBT_SCAN_MAXBLOCKS, |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1287 | .pattern = mirror_pattern |
| 1288 | }; |
| 1289 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1290 | #define BADBLOCK_SCAN_MASK (~NAND_BBT_NO_OOB) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1291 | /** |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1292 | * nand_create_badblock_pattern - [INTERN] Creates a BBT descriptor structure |
| 1293 | * @this: NAND chip to create descriptor for |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1294 | * |
| 1295 | * This function allocates and initializes a nand_bbt_descr for BBM detection |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1296 | * based on the properties of @this. The new descriptor is stored in |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1297 | * this->badblock_pattern. Thus, this->badblock_pattern should be NULL when |
| 1298 | * passed to this function. |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1299 | */ |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1300 | static int nand_create_badblock_pattern(struct nand_chip *this) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1301 | { |
| 1302 | struct nand_bbt_descr *bd; |
| 1303 | if (this->badblock_pattern) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1304 | pr_warn("Bad block pattern already allocated; not replacing\n"); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1305 | return -EINVAL; |
| 1306 | } |
| 1307 | bd = kzalloc(sizeof(*bd), GFP_KERNEL); |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1308 | if (!bd) |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1309 | return -ENOMEM; |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1310 | bd->options = this->bbt_options & BADBLOCK_SCAN_MASK; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1311 | bd->offs = this->badblockpos; |
| 1312 | bd->len = (this->options & NAND_BUSWIDTH_16) ? 2 : 1; |
| 1313 | bd->pattern = scan_ff_pattern; |
| 1314 | bd->options |= NAND_BBT_DYNAMICSTRUCT; |
| 1315 | this->badblock_pattern = bd; |
| 1316 | return 0; |
| 1317 | } |
| 1318 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1319 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1320 | * 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] | 1321 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1322 | * |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1323 | * This function selects the default bad block table support for the device and |
| 1324 | * calls the nand_scan_bbt function. |
| 1325 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1326 | int nand_default_bbt(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1327 | { |
| 1328 | struct nand_chip *this = mtd->priv; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1329 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1330 | /* |
| 1331 | * Default for AG-AND. We must use a flash based bad block table as the |
| 1332 | * devices have factory marked _good_ blocks. Erasing those blocks |
| 1333 | * leads to loss of the good / bad information, so we _must_ store this |
| 1334 | * information in a good / bad table during startup. |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1335 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1336 | if (this->options & NAND_IS_AND) { |
| 1337 | /* Use the default pattern descriptors */ |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1338 | if (!this->bbt_td) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1339 | this->bbt_td = &bbt_main_descr; |
| 1340 | this->bbt_md = &bbt_mirror_descr; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1341 | } |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1342 | this->bbt_options |= NAND_BBT_USE_FLASH; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1343 | return nand_scan_bbt(mtd, &agand_flashbased); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1344 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1345 | |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1346 | /* Is a flash based bad block table requested? */ |
| 1347 | if (this->bbt_options & NAND_BBT_USE_FLASH) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1348 | /* Use the default pattern descriptors */ |
| 1349 | if (!this->bbt_td) { |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1350 | if (this->bbt_options & NAND_BBT_NO_OOB) { |
| 1351 | this->bbt_td = &bbt_main_no_oob_descr; |
| 1352 | this->bbt_md = &bbt_mirror_no_oob_descr; |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1353 | } else { |
| 1354 | this->bbt_td = &bbt_main_descr; |
| 1355 | this->bbt_md = &bbt_mirror_descr; |
| 1356 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1357 | } |
| 1358 | } else { |
| 1359 | this->bbt_td = NULL; |
| 1360 | this->bbt_md = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1361 | } |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1362 | |
| 1363 | if (!this->badblock_pattern) |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1364 | nand_create_badblock_pattern(this); |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1365 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1366 | return nand_scan_bbt(mtd, this->badblock_pattern); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1367 | } |
| 1368 | |
| 1369 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1370 | * nand_isbad_bbt - [NAND Interface] Check if a block is bad |
Sergey Lapin | 3a38a55 | 2013-01-14 03:46:50 +0000 | [diff] [blame] | 1371 | * @mtd: MTD device structure |
| 1372 | * @offs: offset in the device |
| 1373 | * @allowbbt: allow access to bad block table region |
| 1374 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1375 | 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] | 1376 | { |
| 1377 | struct nand_chip *this = mtd->priv; |
| 1378 | int block; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1379 | uint8_t res; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1380 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1381 | /* Get block number * 2 */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1382 | block = (int)(offs >> (this->bbt_erase_shift - 1)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1383 | res = (this->bbt[block >> 3] >> (block & 0x06)) & 0x03; |
| 1384 | |
Christian Hitz | 24e6ea4 | 2011-10-12 09:32:04 +0200 | [diff] [blame] | 1385 | MTDDEBUG(MTD_DEBUG_LEVEL2, "nand_isbad_bbt(): bbt info for offs 0x%08x: (block %d) 0x%02x\n", |
| 1386 | (unsigned int)offs, block >> 1, res); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1387 | |
| 1388 | switch ((int)res) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1389 | case 0x00: |
| 1390 | return 0; |
| 1391 | case 0x01: |
| 1392 | return 1; |
| 1393 | case 0x02: |
| 1394 | return allowbbt ? 0 : 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1395 | } |
| 1396 | return 1; |
| 1397 | } |