Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1 | /* |
| 2 | * drivers/mtd/nand.c |
| 3 | * |
| 4 | * Overview: |
| 5 | * This is the generic MTD driver for NAND flash devices. It should be |
| 6 | * capable of working with almost all NAND chips currently available. |
| 7 | * Basic support for AG-AND chips is provided. |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 8 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 9 | * Additional technical information is available on |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 10 | * http://www.linux-mtd.infradead.org/doc/nand.html |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 11 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 12 | * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 13 | * 2002-2006 Thomas Gleixner (tglx@linutronix.de) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 14 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 15 | * Credits: |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 16 | * David Woodhouse for adding multichip support |
| 17 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 18 | * Aleph One Ltd. and Toby Churchill Ltd. for supporting the |
| 19 | * rework for 2K page size chips |
| 20 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 21 | * TODO: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 22 | * Enable cached programming for 2k page size chips |
| 23 | * Check, if mtd->ecctype should be set to MTD_ECC_HW |
| 24 | * if we have HW ecc support. |
| 25 | * The AG-AND chips have nice features for speed improvement, |
| 26 | * which are not supported yet. Read / program 4 pages in one go. |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 27 | * BBT table is not serialized, has to be fixed |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 28 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 29 | * This program is free software; you can redistribute it and/or modify |
| 30 | * it under the terms of the GNU General Public License version 2 as |
| 31 | * published by the Free Software Foundation. |
| 32 | * |
| 33 | */ |
| 34 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 35 | #include <common.h> |
Bartlomiej Sieka | 582f1a3 | 2006-03-05 18:57:33 +0100 | [diff] [blame] | 36 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 37 | #define ENOTSUPP 524 /* Operation is not supported */ |
| 38 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 39 | #include <malloc.h> |
| 40 | #include <watchdog.h> |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 41 | #include <linux/err.h> |
Mike Frysinger | 11d1a09 | 2012-04-09 13:39:55 +0000 | [diff] [blame] | 42 | #include <linux/compat.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 43 | #include <linux/mtd/mtd.h> |
| 44 | #include <linux/mtd/nand.h> |
| 45 | #include <linux/mtd/nand_ecc.h> |
Christian Hitz | 55f7bca | 2011-10-12 09:31:59 +0200 | [diff] [blame] | 46 | #include <linux/mtd/nand_bch.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 47 | |
Stefan Roese | fa252ea | 2009-04-24 15:58:33 +0200 | [diff] [blame] | 48 | #ifdef CONFIG_MTD_PARTITIONS |
| 49 | #include <linux/mtd/partitions.h> |
| 50 | #endif |
| 51 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 52 | #include <asm/io.h> |
| 53 | #include <asm/errno.h> |
| 54 | |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 55 | /* |
| 56 | * CONFIG_SYS_NAND_RESET_CNT is used as a timeout mechanism when resetting |
| 57 | * a flash. NAND flash is initialized prior to interrupts so standard timers |
| 58 | * can't be used. CONFIG_SYS_NAND_RESET_CNT should be set to a value |
| 59 | * which is greater than (max NAND reset time / NAND status read time). |
| 60 | * A conservative default of 200000 (500 us / 25 ns) is used as a default. |
| 61 | */ |
| 62 | #ifndef CONFIG_SYS_NAND_RESET_CNT |
| 63 | #define CONFIG_SYS_NAND_RESET_CNT 200000 |
| 64 | #endif |
| 65 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 66 | /* Define default oob placement schemes for large and small page devices */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 67 | static struct nand_ecclayout nand_oob_8 = { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 68 | .eccbytes = 3, |
| 69 | .eccpos = {0, 1, 2}, |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 70 | .oobfree = { |
| 71 | {.offset = 3, |
| 72 | .length = 2}, |
| 73 | {.offset = 6, |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 74 | .length = 2} } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 75 | }; |
| 76 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 77 | static struct nand_ecclayout nand_oob_16 = { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 78 | .eccbytes = 6, |
| 79 | .eccpos = {0, 1, 2, 3, 6, 7}, |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 80 | .oobfree = { |
| 81 | {.offset = 8, |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 82 | . length = 8} } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 83 | }; |
| 84 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 85 | static struct nand_ecclayout nand_oob_64 = { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 86 | .eccbytes = 24, |
| 87 | .eccpos = { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 88 | 40, 41, 42, 43, 44, 45, 46, 47, |
| 89 | 48, 49, 50, 51, 52, 53, 54, 55, |
| 90 | 56, 57, 58, 59, 60, 61, 62, 63}, |
| 91 | .oobfree = { |
| 92 | {.offset = 2, |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 93 | .length = 38} } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 94 | }; |
| 95 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 96 | static struct nand_ecclayout nand_oob_128 = { |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 97 | .eccbytes = 48, |
| 98 | .eccpos = { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 99 | 80, 81, 82, 83, 84, 85, 86, 87, |
| 100 | 88, 89, 90, 91, 92, 93, 94, 95, |
| 101 | 96, 97, 98, 99, 100, 101, 102, 103, |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 102 | 104, 105, 106, 107, 108, 109, 110, 111, |
| 103 | 112, 113, 114, 115, 116, 117, 118, 119, |
| 104 | 120, 121, 122, 123, 124, 125, 126, 127}, |
| 105 | .oobfree = { |
| 106 | {.offset = 2, |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 107 | .length = 78} } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 108 | }; |
| 109 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 110 | static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, |
| 111 | int new_state); |
| 112 | |
| 113 | static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, |
| 114 | struct mtd_oob_ops *ops); |
| 115 | |
| 116 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *this); |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 117 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 118 | static int check_offs_len(struct mtd_info *mtd, |
| 119 | loff_t ofs, uint64_t len) |
| 120 | { |
| 121 | struct nand_chip *chip = mtd->priv; |
| 122 | int ret = 0; |
| 123 | |
| 124 | /* Start address must align on block boundary */ |
| 125 | if (ofs & ((1 << chip->phys_erase_shift) - 1)) { |
| 126 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Unaligned address\n", __func__); |
| 127 | ret = -EINVAL; |
| 128 | } |
| 129 | |
| 130 | /* Length must align on block boundary */ |
| 131 | if (len & ((1 << chip->phys_erase_shift) - 1)) { |
| 132 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Length not block aligned\n", |
| 133 | __func__); |
| 134 | ret = -EINVAL; |
| 135 | } |
| 136 | |
| 137 | /* Do not allow past end of device */ |
| 138 | if (ofs + len > mtd->size) { |
| 139 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Past end of device\n", |
| 140 | __func__); |
| 141 | ret = -EINVAL; |
| 142 | } |
| 143 | |
| 144 | return ret; |
| 145 | } |
| 146 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 147 | /** |
| 148 | * nand_release_device - [GENERIC] release chip |
| 149 | * @mtd: MTD device structure |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 150 | * |
| 151 | * Deselect, release chip lock and wake up anyone waiting on the device |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 152 | */ |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 153 | static void nand_release_device(struct mtd_info *mtd) |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 154 | { |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 155 | struct nand_chip *chip = mtd->priv; |
| 156 | |
| 157 | /* De-select the NAND device */ |
| 158 | chip->select_chip(mtd, -1); |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 159 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 160 | |
| 161 | /** |
| 162 | * nand_read_byte - [DEFAULT] read one byte from the chip |
| 163 | * @mtd: MTD device structure |
| 164 | * |
| 165 | * Default read function for 8bit buswith |
| 166 | */ |
Simon Schwarz | 5a9fc19 | 2011-10-31 06:34:44 +0000 | [diff] [blame] | 167 | uint8_t nand_read_byte(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 168 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 169 | struct nand_chip *chip = mtd->priv; |
| 170 | return readb(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | /** |
| 174 | * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip |
| 175 | * @mtd: MTD device structure |
| 176 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 177 | * Default read function for 16bit buswith with |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 178 | * endianess conversion |
| 179 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 180 | static uint8_t nand_read_byte16(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 181 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 182 | struct nand_chip *chip = mtd->priv; |
| 183 | return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | /** |
| 187 | * nand_read_word - [DEFAULT] read one word from the chip |
| 188 | * @mtd: MTD device structure |
| 189 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 190 | * Default read function for 16bit buswith without |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 191 | * endianess conversion |
| 192 | */ |
| 193 | static u16 nand_read_word(struct mtd_info *mtd) |
| 194 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 195 | struct nand_chip *chip = mtd->priv; |
| 196 | return readw(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | /** |
| 200 | * nand_select_chip - [DEFAULT] control CE line |
| 201 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 202 | * @chipnr: chipnumber to select, -1 for deselect |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 203 | * |
| 204 | * Default select function for 1 chip devices. |
| 205 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 206 | static void nand_select_chip(struct mtd_info *mtd, int chipnr) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 207 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 208 | struct nand_chip *chip = mtd->priv; |
| 209 | |
| 210 | switch (chipnr) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 211 | case -1: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 212 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 213 | break; |
| 214 | case 0: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 215 | break; |
| 216 | |
| 217 | default: |
| 218 | BUG(); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * nand_write_buf - [DEFAULT] write buffer to chip |
| 224 | * @mtd: MTD device structure |
| 225 | * @buf: data buffer |
| 226 | * @len: number of bytes to write |
| 227 | * |
| 228 | * Default write function for 8bit buswith |
| 229 | */ |
Simon Schwarz | 5a9fc19 | 2011-10-31 06:34:44 +0000 | [diff] [blame] | 230 | void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 231 | { |
| 232 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 233 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 234 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 235 | for (i = 0; i < len; i++) |
| 236 | writeb(buf[i], chip->IO_ADDR_W); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 240 | * nand_read_buf - [DEFAULT] read chip data into buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 241 | * @mtd: MTD device structure |
| 242 | * @buf: buffer to store date |
| 243 | * @len: number of bytes to read |
| 244 | * |
| 245 | * Default read function for 8bit buswith |
| 246 | */ |
Simon Schwarz | 4f62e98 | 2011-09-14 15:30:16 -0400 | [diff] [blame] | 247 | void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 248 | { |
| 249 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 250 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 251 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 252 | for (i = 0; i < len; i++) |
| 253 | buf[i] = readb(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 257 | * nand_verify_buf - [DEFAULT] Verify chip data against buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 258 | * @mtd: MTD device structure |
| 259 | * @buf: buffer containing the data to compare |
| 260 | * @len: number of bytes to compare |
| 261 | * |
| 262 | * Default verify function for 8bit buswith |
| 263 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 264 | static int nand_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 265 | { |
| 266 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 267 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 268 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 269 | for (i = 0; i < len; i++) |
| 270 | if (buf[i] != readb(chip->IO_ADDR_R)) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 271 | return -EFAULT; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | /** |
| 276 | * nand_write_buf16 - [DEFAULT] write buffer to chip |
| 277 | * @mtd: MTD device structure |
| 278 | * @buf: data buffer |
| 279 | * @len: number of bytes to write |
| 280 | * |
| 281 | * Default write function for 16bit buswith |
| 282 | */ |
Simon Schwarz | 5a9fc19 | 2011-10-31 06:34:44 +0000 | [diff] [blame] | 283 | void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 284 | { |
| 285 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 286 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 287 | u16 *p = (u16 *) buf; |
| 288 | len >>= 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 289 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 290 | for (i = 0; i < len; i++) |
| 291 | writew(p[i], chip->IO_ADDR_W); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 292 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 296 | * nand_read_buf16 - [DEFAULT] read chip data into buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 297 | * @mtd: MTD device structure |
| 298 | * @buf: buffer to store date |
| 299 | * @len: number of bytes to read |
| 300 | * |
| 301 | * Default read function for 16bit buswith |
| 302 | */ |
Simon Schwarz | 4f62e98 | 2011-09-14 15:30:16 -0400 | [diff] [blame] | 303 | void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 304 | { |
| 305 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 306 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 307 | u16 *p = (u16 *) buf; |
| 308 | len >>= 1; |
| 309 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 310 | for (i = 0; i < len; i++) |
| 311 | p[i] = readw(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 315 | * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 316 | * @mtd: MTD device structure |
| 317 | * @buf: buffer containing the data to compare |
| 318 | * @len: number of bytes to compare |
| 319 | * |
| 320 | * Default verify function for 16bit buswith |
| 321 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 322 | static int nand_verify_buf16(struct mtd_info *mtd, const uint8_t *buf, int len) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 323 | { |
| 324 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 325 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 326 | u16 *p = (u16 *) buf; |
| 327 | len >>= 1; |
| 328 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 329 | for (i = 0; i < len; i++) |
| 330 | if (p[i] != readw(chip->IO_ADDR_R)) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 331 | return -EFAULT; |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | /** |
| 337 | * nand_block_bad - [DEFAULT] Read bad block marker from the chip |
| 338 | * @mtd: MTD device structure |
| 339 | * @ofs: offset from device start |
| 340 | * @getchip: 0, if the chip is already selected |
| 341 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 342 | * Check, if the block is bad. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 343 | */ |
| 344 | static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) |
| 345 | { |
| 346 | int page, chipnr, res = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 347 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 348 | u16 bad; |
| 349 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 350 | if (chip->options & NAND_BBT_SCANLASTPAGE) |
| 351 | ofs += mtd->erasesize - mtd->writesize; |
| 352 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 353 | page = (int)(ofs >> chip->page_shift) & chip->pagemask; |
Thomas Knobloch | 9e2aeaf | 2007-05-05 07:04:42 +0200 | [diff] [blame] | 354 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 355 | if (getchip) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 356 | chipnr = (int)(ofs >> chip->chip_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 357 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 358 | nand_get_device(chip, mtd, FL_READING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 359 | |
| 360 | /* Select the NAND device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 361 | chip->select_chip(mtd, chipnr); |
Thomas Knobloch | 9e2aeaf | 2007-05-05 07:04:42 +0200 | [diff] [blame] | 362 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 363 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 364 | if (chip->options & NAND_BUSWIDTH_16) { |
| 365 | chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE, |
| 366 | page); |
| 367 | bad = cpu_to_le16(chip->read_word(mtd)); |
| 368 | if (chip->badblockpos & 0x1) |
| 369 | bad >>= 8; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 370 | else |
| 371 | bad &= 0xFF; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 372 | } else { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 373 | chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, page); |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 374 | bad = chip->read_byte(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 375 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 376 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 377 | if (likely(chip->badblockbits == 8)) |
| 378 | res = bad != 0xFF; |
| 379 | else |
| 380 | res = hweight8(bad) < chip->badblockbits; |
| 381 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 382 | if (getchip) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 383 | nand_release_device(mtd); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 384 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 385 | return res; |
| 386 | } |
| 387 | |
| 388 | /** |
| 389 | * nand_default_block_markbad - [DEFAULT] mark a block bad |
| 390 | * @mtd: MTD device structure |
| 391 | * @ofs: offset from device start |
| 392 | * |
| 393 | * This is the default implementation, which can be overridden by |
| 394 | * a hardware specific driver. |
| 395 | */ |
| 396 | static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) |
| 397 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 398 | struct nand_chip *chip = mtd->priv; |
| 399 | uint8_t buf[2] = { 0, 0 }; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 400 | int block, ret, i = 0; |
| 401 | |
| 402 | if (chip->options & NAND_BBT_SCANLASTPAGE) |
| 403 | ofs += mtd->erasesize - mtd->writesize; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 404 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 405 | /* Get block number */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 406 | block = (int)(ofs >> chip->bbt_erase_shift); |
| 407 | if (chip->bbt) |
| 408 | chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 409 | |
| 410 | /* Do we have a flash based bad block table ? */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 411 | if (chip->options & NAND_USE_FLASH_BBT) |
| 412 | ret = nand_update_bbt(mtd, ofs); |
| 413 | else { |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 414 | nand_get_device(chip, mtd, FL_WRITING); |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 415 | |
| 416 | /* Write to first two pages and to byte 1 and 6 if necessary. |
| 417 | * If we write to more than one location, the first error |
| 418 | * encountered quits the procedure. We write two bytes per |
| 419 | * location, so we dont have to mess with 16 bit access. |
| 420 | */ |
| 421 | do { |
| 422 | chip->ops.len = chip->ops.ooblen = 2; |
| 423 | chip->ops.datbuf = NULL; |
| 424 | chip->ops.oobbuf = buf; |
| 425 | chip->ops.ooboffs = chip->badblockpos & ~0x01; |
| 426 | |
| 427 | ret = nand_do_write_oob(mtd, ofs, &chip->ops); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 428 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 429 | if (!ret && (chip->options & NAND_BBT_SCANBYTE1AND6)) { |
| 430 | chip->ops.ooboffs = NAND_SMALL_BADBLOCK_POS |
| 431 | & ~0x01; |
| 432 | ret = nand_do_write_oob(mtd, ofs, &chip->ops); |
| 433 | } |
| 434 | i++; |
| 435 | ofs += mtd->writesize; |
| 436 | } while (!ret && (chip->options & NAND_BBT_SCAN2NDPAGE) && |
| 437 | i < 2); |
| 438 | |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 439 | nand_release_device(mtd); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 440 | } |
| 441 | if (!ret) |
| 442 | mtd->ecc_stats.badblocks++; |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 443 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 444 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 445 | } |
| 446 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 447 | /** |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 448 | * nand_check_wp - [GENERIC] check if the chip is write protected |
| 449 | * @mtd: MTD device structure |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 450 | * Check, if the device is write protected |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 451 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 452 | * The function expects, that the device is already selected |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 453 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 454 | static int nand_check_wp(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 455 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 456 | struct nand_chip *chip = mtd->priv; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 457 | |
| 458 | /* broken xD cards report WP despite being writable */ |
| 459 | if (chip->options & NAND_BROKEN_XD) |
| 460 | return 0; |
| 461 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 462 | /* Check the WP bit */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 463 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
| 464 | return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 465 | } |
Markus Klotzbücher | 27eba14 | 2006-03-06 15:04:25 +0100 | [diff] [blame] | 466 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 467 | /** |
| 468 | * nand_block_checkbad - [GENERIC] Check if a block is marked bad |
| 469 | * @mtd: MTD device structure |
| 470 | * @ofs: offset from device start |
| 471 | * @getchip: 0, if the chip is already selected |
| 472 | * @allowbbt: 1, if its allowed to access the bbt area |
| 473 | * |
| 474 | * Check, if the block is bad. Either by reading the bad block table or |
| 475 | * calling of the scan function. |
| 476 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 477 | static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, |
| 478 | int allowbbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 479 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 480 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 481 | |
Scott Wood | f2f5c9e | 2012-02-20 14:50:39 -0600 | [diff] [blame] | 482 | if (!(chip->options & NAND_BBT_SCANNED)) { |
| 483 | chip->options |= NAND_BBT_SCANNED; |
| 484 | chip->scan_bbt(mtd); |
| 485 | } |
| 486 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 487 | if (!chip->bbt) |
| 488 | return chip->block_bad(mtd, ofs, getchip); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 489 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 490 | /* Return info from the table */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 491 | return nand_isbad_bbt(mtd, ofs, allowbbt); |
| 492 | } |
| 493 | |
| 494 | /* |
| 495 | * Wait for the ready pin, after a command |
| 496 | * The timeout is catched later. |
| 497 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 498 | void nand_wait_ready(struct mtd_info *mtd) |
| 499 | { |
| 500 | struct nand_chip *chip = mtd->priv; |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 501 | u32 timeo = (CONFIG_SYS_HZ * 20) / 1000; |
Reinhard Meyer | 4d1fb18 | 2010-11-18 03:14:26 +0000 | [diff] [blame] | 502 | u32 time_start; |
Stefan Roese | a5c312c | 2008-01-05 16:43:25 +0100 | [diff] [blame] | 503 | |
Reinhard Meyer | 4d1fb18 | 2010-11-18 03:14:26 +0000 | [diff] [blame] | 504 | time_start = get_timer(0); |
Stefan Roese | a5c312c | 2008-01-05 16:43:25 +0100 | [diff] [blame] | 505 | |
| 506 | /* wait until command is processed or timeout occures */ |
Reinhard Meyer | 4d1fb18 | 2010-11-18 03:14:26 +0000 | [diff] [blame] | 507 | while (get_timer(time_start) < timeo) { |
Stefan Roese | a5c312c | 2008-01-05 16:43:25 +0100 | [diff] [blame] | 508 | if (chip->dev_ready) |
| 509 | if (chip->dev_ready(mtd)) |
| 510 | break; |
| 511 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | /** |
| 515 | * nand_command - [DEFAULT] Send command to NAND device |
| 516 | * @mtd: MTD device structure |
| 517 | * @command: the command to be sent |
| 518 | * @column: the column address for this command, -1 if none |
| 519 | * @page_addr: the page address for this command, -1 if none |
| 520 | * |
| 521 | * Send command to NAND device. This function is used for small page |
| 522 | * devices (256/512 Bytes per page) |
| 523 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 524 | static void nand_command(struct mtd_info *mtd, unsigned int command, |
| 525 | int column, int page_addr) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 526 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 527 | register struct nand_chip *chip = mtd->priv; |
| 528 | int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE; |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 529 | uint32_t rst_sts_cnt = CONFIG_SYS_NAND_RESET_CNT; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 530 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 531 | /* |
| 532 | * Write out the command to the device. |
| 533 | */ |
| 534 | if (command == NAND_CMD_SEQIN) { |
| 535 | int readcmd; |
| 536 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 537 | if (column >= mtd->writesize) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 538 | /* OOB area */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 539 | column -= mtd->writesize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 540 | readcmd = NAND_CMD_READOOB; |
| 541 | } else if (column < 256) { |
| 542 | /* First 256 bytes --> READ0 */ |
| 543 | readcmd = NAND_CMD_READ0; |
| 544 | } else { |
| 545 | column -= 256; |
| 546 | readcmd = NAND_CMD_READ1; |
| 547 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 548 | chip->cmd_ctrl(mtd, readcmd, ctrl); |
| 549 | ctrl &= ~NAND_CTRL_CHANGE; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 550 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 551 | chip->cmd_ctrl(mtd, command, ctrl); |
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 | /* |
| 554 | * Address cycle, when necessary |
| 555 | */ |
| 556 | ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE; |
| 557 | /* Serially input address */ |
| 558 | if (column != -1) { |
| 559 | /* Adjust columns for 16 bit buswidth */ |
| 560 | if (chip->options & NAND_BUSWIDTH_16) |
| 561 | column >>= 1; |
| 562 | chip->cmd_ctrl(mtd, column, ctrl); |
| 563 | ctrl &= ~NAND_CTRL_CHANGE; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 564 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 565 | if (page_addr != -1) { |
| 566 | chip->cmd_ctrl(mtd, page_addr, ctrl); |
| 567 | ctrl &= ~NAND_CTRL_CHANGE; |
| 568 | chip->cmd_ctrl(mtd, page_addr >> 8, ctrl); |
| 569 | /* One more address cycle for devices > 32MiB */ |
| 570 | if (chip->chipsize > (32 << 20)) |
| 571 | chip->cmd_ctrl(mtd, page_addr >> 16, ctrl); |
| 572 | } |
| 573 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 574 | |
| 575 | /* |
| 576 | * program and erase have their own busy handlers |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 577 | * status and sequential in needs no delay |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 578 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 579 | switch (command) { |
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 | case NAND_CMD_PAGEPROG: |
| 582 | case NAND_CMD_ERASE1: |
| 583 | case NAND_CMD_ERASE2: |
| 584 | case NAND_CMD_SEQIN: |
| 585 | case NAND_CMD_STATUS: |
| 586 | return; |
| 587 | |
| 588 | case NAND_CMD_RESET: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 589 | if (chip->dev_ready) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 590 | break; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 591 | udelay(chip->chip_delay); |
| 592 | chip->cmd_ctrl(mtd, NAND_CMD_STATUS, |
| 593 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); |
| 594 | chip->cmd_ctrl(mtd, |
| 595 | NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 596 | while (!(chip->read_byte(mtd) & NAND_STATUS_READY) && |
| 597 | (rst_sts_cnt--)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 598 | return; |
| 599 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 600 | /* This applies to read commands */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 601 | default: |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 602 | /* |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 603 | * If we don't have access to the busy pin, we apply the given |
| 604 | * command delay |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 605 | */ |
| 606 | if (!chip->dev_ready) { |
| 607 | udelay(chip->chip_delay); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 608 | return; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 609 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 610 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 611 | /* Apply this short delay always to ensure that we do wait tWB in |
| 612 | * any case on any machine. */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 613 | ndelay(100); |
| 614 | |
| 615 | nand_wait_ready(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 616 | } |
| 617 | |
| 618 | /** |
| 619 | * nand_command_lp - [DEFAULT] Send command to NAND large page device |
| 620 | * @mtd: MTD device structure |
| 621 | * @command: the command to be sent |
| 622 | * @column: the column address for this command, -1 if none |
| 623 | * @page_addr: the page address for this command, -1 if none |
| 624 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 625 | * Send command to NAND device. This is the version for the new large page |
| 626 | * devices We dont have the separate regions as we have in the small page |
| 627 | * devices. We must emulate NAND_CMD_READOOB to keep the code compatible. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 628 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 629 | static void nand_command_lp(struct mtd_info *mtd, unsigned int command, |
| 630 | int column, int page_addr) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 631 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 632 | register struct nand_chip *chip = mtd->priv; |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 633 | uint32_t rst_sts_cnt = CONFIG_SYS_NAND_RESET_CNT; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 634 | |
| 635 | /* Emulate NAND_CMD_READOOB */ |
| 636 | if (command == NAND_CMD_READOOB) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 637 | column += mtd->writesize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 638 | command = NAND_CMD_READ0; |
| 639 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 640 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 641 | /* Command latch cycle */ |
| 642 | chip->cmd_ctrl(mtd, command & 0xff, |
| 643 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 644 | |
| 645 | if (column != -1 || page_addr != -1) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 646 | int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 647 | |
| 648 | /* Serially input address */ |
| 649 | if (column != -1) { |
| 650 | /* Adjust columns for 16 bit buswidth */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 651 | if (chip->options & NAND_BUSWIDTH_16) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 652 | column >>= 1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 653 | chip->cmd_ctrl(mtd, column, ctrl); |
| 654 | ctrl &= ~NAND_CTRL_CHANGE; |
| 655 | chip->cmd_ctrl(mtd, column >> 8, ctrl); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 656 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 657 | if (page_addr != -1) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 658 | chip->cmd_ctrl(mtd, page_addr, ctrl); |
| 659 | chip->cmd_ctrl(mtd, page_addr >> 8, |
| 660 | NAND_NCE | NAND_ALE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 661 | /* One more address cycle for devices > 128MiB */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 662 | if (chip->chipsize > (128 << 20)) |
| 663 | chip->cmd_ctrl(mtd, page_addr >> 16, |
| 664 | NAND_NCE | NAND_ALE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 665 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 666 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 667 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 668 | |
| 669 | /* |
| 670 | * program and erase have their own busy handlers |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 671 | * status, sequential in, and deplete1 need no delay |
| 672 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 673 | switch (command) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 674 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 675 | case NAND_CMD_CACHEDPROG: |
| 676 | case NAND_CMD_PAGEPROG: |
| 677 | case NAND_CMD_ERASE1: |
| 678 | case NAND_CMD_ERASE2: |
| 679 | case NAND_CMD_SEQIN: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 680 | case NAND_CMD_RNDIN: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 681 | case NAND_CMD_STATUS: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 682 | case NAND_CMD_DEPLETE1: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 683 | return; |
| 684 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 685 | /* |
| 686 | * read error status commands require only a short delay |
| 687 | */ |
| 688 | case NAND_CMD_STATUS_ERROR: |
| 689 | case NAND_CMD_STATUS_ERROR0: |
| 690 | case NAND_CMD_STATUS_ERROR1: |
| 691 | case NAND_CMD_STATUS_ERROR2: |
| 692 | case NAND_CMD_STATUS_ERROR3: |
| 693 | udelay(chip->chip_delay); |
| 694 | return; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 695 | |
| 696 | case NAND_CMD_RESET: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 697 | if (chip->dev_ready) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 698 | break; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 699 | udelay(chip->chip_delay); |
| 700 | chip->cmd_ctrl(mtd, NAND_CMD_STATUS, |
| 701 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
| 702 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, |
| 703 | NAND_NCE | NAND_CTRL_CHANGE); |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 704 | while (!(chip->read_byte(mtd) & NAND_STATUS_READY) && |
| 705 | (rst_sts_cnt--)); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 706 | return; |
| 707 | |
| 708 | case NAND_CMD_RNDOUT: |
| 709 | /* No ready / busy check necessary */ |
| 710 | chip->cmd_ctrl(mtd, NAND_CMD_RNDOUTSTART, |
| 711 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
| 712 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, |
| 713 | NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 714 | return; |
| 715 | |
| 716 | case NAND_CMD_READ0: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 717 | chip->cmd_ctrl(mtd, NAND_CMD_READSTART, |
| 718 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
| 719 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, |
| 720 | NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 721 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 722 | /* This applies to read commands */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 723 | default: |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 724 | /* |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 725 | * If we don't have access to the busy pin, we apply the given |
| 726 | * command delay |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 727 | */ |
| 728 | if (!chip->dev_ready) { |
| 729 | udelay(chip->chip_delay); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 730 | return; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 731 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 732 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 733 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 734 | /* Apply this short delay always to ensure that we do wait tWB in |
| 735 | * any case on any machine. */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 736 | ndelay(100); |
| 737 | |
| 738 | nand_wait_ready(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 739 | } |
| 740 | |
| 741 | /** |
| 742 | * nand_get_device - [GENERIC] Get chip for selected access |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 743 | * @chip: the nand chip descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 744 | * @mtd: MTD device structure |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 745 | * @new_state: the state which is requested |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 746 | * |
| 747 | * Get the device and lock it for exclusive access |
| 748 | */ |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 749 | static int |
| 750 | nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 751 | { |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 752 | chip->state = new_state; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 753 | return 0; |
| 754 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 755 | |
| 756 | /** |
| 757 | * nand_wait - [DEFAULT] wait until the command is done |
| 758 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 759 | * @chip: NAND chip structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 760 | * |
| 761 | * Wait for command done. This applies to erase and program only |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 762 | * Erase can take up to 400ms and program up to 20ms according to |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 763 | * general NAND and SmartMedia specs |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 764 | */ |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 765 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 766 | { |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 767 | unsigned long timeo; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 768 | int state = chip->state; |
Reinhard Meyer | 4d1fb18 | 2010-11-18 03:14:26 +0000 | [diff] [blame] | 769 | u32 time_start; |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 770 | |
| 771 | if (state == FL_ERASING) |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 772 | timeo = (CONFIG_SYS_HZ * 400) / 1000; |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 773 | else |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 774 | timeo = (CONFIG_SYS_HZ * 20) / 1000; |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 775 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 776 | if ((state == FL_ERASING) && (chip->options & NAND_IS_AND)) |
| 777 | chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 778 | else |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 779 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 780 | |
Reinhard Meyer | 4d1fb18 | 2010-11-18 03:14:26 +0000 | [diff] [blame] | 781 | time_start = get_timer(0); |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 782 | |
| 783 | while (1) { |
Reinhard Meyer | 4d1fb18 | 2010-11-18 03:14:26 +0000 | [diff] [blame] | 784 | if (get_timer(time_start) > timeo) { |
Bartlomiej Sieka | 6eed2ab | 2006-02-24 09:37:22 +0100 | [diff] [blame] | 785 | printf("Timeout!"); |
Stefan Roese | ef26d24 | 2006-11-27 17:22:19 +0100 | [diff] [blame] | 786 | return 0x01; |
| 787 | } |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 788 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 789 | if (chip->dev_ready) { |
| 790 | if (chip->dev_ready(mtd)) |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 791 | break; |
| 792 | } else { |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 793 | if (chip->read_byte(mtd) & NAND_STATUS_READY) |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 794 | break; |
| 795 | } |
| 796 | } |
Bartlomiej Sieka | 582f1a3 | 2006-03-05 18:57:33 +0100 | [diff] [blame] | 797 | #ifdef PPCHAMELON_NAND_TIMER_HACK |
Reinhard Meyer | 4d1fb18 | 2010-11-18 03:14:26 +0000 | [diff] [blame] | 798 | time_start = get_timer(0); |
| 799 | while (get_timer(time_start) < 10) |
| 800 | ; |
Bartlomiej Sieka | 582f1a3 | 2006-03-05 18:57:33 +0100 | [diff] [blame] | 801 | #endif /* PPCHAMELON_NAND_TIMER_HACK */ |
Bartlomiej Sieka | 6eed2ab | 2006-02-24 09:37:22 +0100 | [diff] [blame] | 802 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 803 | return (int)chip->read_byte(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 804 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 805 | |
| 806 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 807 | * nand_read_page_raw - [Intern] read raw page data without ecc |
| 808 | * @mtd: mtd info structure |
| 809 | * @chip: nand chip info structure |
| 810 | * @buf: buffer to store read data |
Sandeep Paulraj | 22bc7ba | 2009-11-07 14:24:50 -0500 | [diff] [blame] | 811 | * @page: page number to read |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 812 | * |
| 813 | * Not for syndrome calculating ecc controllers, which use a special oob layout |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 814 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 815 | static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, |
Sandeep Paulraj | 883189e | 2009-08-10 13:27:46 -0400 | [diff] [blame] | 816 | uint8_t *buf, int page) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 817 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 818 | chip->read_buf(mtd, buf, mtd->writesize); |
| 819 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 820 | return 0; |
| 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 | /** |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 824 | * nand_read_page_raw_syndrome - [Intern] read raw page data without ecc |
| 825 | * @mtd: mtd info structure |
| 826 | * @chip: nand chip info structure |
| 827 | * @buf: buffer to store read data |
| 828 | * @page: page number to read |
| 829 | * |
| 830 | * We need a special oob layout and handling even when OOB isn't used. |
| 831 | */ |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 832 | static int nand_read_page_raw_syndrome(struct mtd_info *mtd, |
| 833 | struct nand_chip *chip, |
| 834 | uint8_t *buf, int page) |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 835 | { |
| 836 | int eccsize = chip->ecc.size; |
| 837 | int eccbytes = chip->ecc.bytes; |
| 838 | uint8_t *oob = chip->oob_poi; |
| 839 | int steps, size; |
| 840 | |
| 841 | for (steps = chip->ecc.steps; steps > 0; steps--) { |
| 842 | chip->read_buf(mtd, buf, eccsize); |
| 843 | buf += eccsize; |
| 844 | |
| 845 | if (chip->ecc.prepad) { |
| 846 | chip->read_buf(mtd, oob, chip->ecc.prepad); |
| 847 | oob += chip->ecc.prepad; |
| 848 | } |
| 849 | |
| 850 | chip->read_buf(mtd, oob, eccbytes); |
| 851 | oob += eccbytes; |
| 852 | |
| 853 | if (chip->ecc.postpad) { |
| 854 | chip->read_buf(mtd, oob, chip->ecc.postpad); |
| 855 | oob += chip->ecc.postpad; |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | size = mtd->oobsize - (oob - chip->oob_poi); |
| 860 | if (size) |
| 861 | chip->read_buf(mtd, oob, size); |
| 862 | |
| 863 | return 0; |
| 864 | } |
| 865 | |
| 866 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 867 | * nand_read_page_swecc - [REPLACABLE] software ecc based page read function |
| 868 | * @mtd: mtd info structure |
| 869 | * @chip: nand chip info structure |
| 870 | * @buf: buffer to store read data |
Sandeep Paulraj | 22bc7ba | 2009-11-07 14:24:50 -0500 | [diff] [blame] | 871 | * @page: page number to read |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 872 | */ |
| 873 | static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, |
Sandeep Paulraj | 883189e | 2009-08-10 13:27:46 -0400 | [diff] [blame] | 874 | uint8_t *buf, int page) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 875 | { |
| 876 | int i, eccsize = chip->ecc.size; |
| 877 | int eccbytes = chip->ecc.bytes; |
| 878 | int eccsteps = chip->ecc.steps; |
| 879 | uint8_t *p = buf; |
| 880 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 881 | uint8_t *ecc_code = chip->buffers->ecccode; |
| 882 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 883 | |
Sandeep Paulraj | 883189e | 2009-08-10 13:27:46 -0400 | [diff] [blame] | 884 | chip->ecc.read_page_raw(mtd, chip, buf, page); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 885 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 886 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) |
| 887 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 888 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 889 | for (i = 0; i < chip->ecc.total; i++) |
| 890 | ecc_code[i] = chip->oob_poi[eccpos[i]]; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 891 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 892 | eccsteps = chip->ecc.steps; |
| 893 | p = buf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 894 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 895 | for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 896 | int stat; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 897 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 898 | stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 899 | if (stat < 0) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 900 | mtd->ecc_stats.failed++; |
| 901 | else |
| 902 | mtd->ecc_stats.corrected += stat; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 903 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 904 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 905 | } |
| 906 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 907 | /** |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 908 | * nand_read_subpage - [REPLACABLE] software ecc based sub-page read function |
| 909 | * @mtd: mtd info structure |
| 910 | * @chip: nand chip info structure |
Sandeep Paulraj | 22bc7ba | 2009-11-07 14:24:50 -0500 | [diff] [blame] | 911 | * @data_offs: offset of requested data within the page |
| 912 | * @readlen: data length |
| 913 | * @bufpoi: buffer to store read data |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 914 | */ |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 915 | static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, |
| 916 | uint32_t data_offs, uint32_t readlen, uint8_t *bufpoi) |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 917 | { |
| 918 | int start_step, end_step, num_steps; |
| 919 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
| 920 | uint8_t *p; |
| 921 | int data_col_addr, i, gaps = 0; |
| 922 | int datafrag_len, eccfrag_len, aligned_len, aligned_pos; |
| 923 | int busw = (chip->options & NAND_BUSWIDTH_16) ? 2 : 1; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 924 | int index = 0; |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 925 | |
| 926 | /* Column address wihin the page aligned to ECC size (256bytes). */ |
| 927 | start_step = data_offs / chip->ecc.size; |
| 928 | end_step = (data_offs + readlen - 1) / chip->ecc.size; |
| 929 | num_steps = end_step - start_step + 1; |
| 930 | |
| 931 | /* Data size aligned to ECC ecc.size*/ |
| 932 | datafrag_len = num_steps * chip->ecc.size; |
| 933 | eccfrag_len = num_steps * chip->ecc.bytes; |
| 934 | |
| 935 | data_col_addr = start_step * chip->ecc.size; |
| 936 | /* If we read not a page aligned data */ |
| 937 | if (data_col_addr != 0) |
| 938 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_col_addr, -1); |
| 939 | |
| 940 | p = bufpoi + data_col_addr; |
| 941 | chip->read_buf(mtd, p, datafrag_len); |
| 942 | |
| 943 | /* Calculate ECC */ |
| 944 | for (i = 0; i < eccfrag_len ; i += chip->ecc.bytes, p += chip->ecc.size) |
| 945 | chip->ecc.calculate(mtd, p, &chip->buffers->ecccalc[i]); |
| 946 | |
| 947 | /* The performance is faster if to position offsets |
| 948 | according to ecc.pos. Let make sure here that |
| 949 | there are no gaps in ecc positions */ |
| 950 | for (i = 0; i < eccfrag_len - 1; i++) { |
| 951 | if (eccpos[i + start_step * chip->ecc.bytes] + 1 != |
| 952 | eccpos[i + start_step * chip->ecc.bytes + 1]) { |
| 953 | gaps = 1; |
| 954 | break; |
| 955 | } |
| 956 | } |
| 957 | if (gaps) { |
| 958 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1); |
| 959 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 960 | } else { |
| 961 | /* send the command to read the particular ecc bytes */ |
| 962 | /* take care about buswidth alignment in read_buf */ |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 963 | index = start_step * chip->ecc.bytes; |
| 964 | |
| 965 | aligned_pos = eccpos[index] & ~(busw - 1); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 966 | aligned_len = eccfrag_len; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 967 | if (eccpos[index] & (busw - 1)) |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 968 | aligned_len++; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 969 | if (eccpos[index + (num_steps * chip->ecc.bytes)] & (busw - 1)) |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 970 | aligned_len++; |
| 971 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 972 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, |
| 973 | mtd->writesize + aligned_pos, -1); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 974 | chip->read_buf(mtd, &chip->oob_poi[aligned_pos], aligned_len); |
| 975 | } |
| 976 | |
| 977 | for (i = 0; i < eccfrag_len; i++) |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 978 | chip->buffers->ecccode[i] = chip->oob_poi[eccpos[i + index]]; |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 979 | |
| 980 | p = bufpoi + data_col_addr; |
| 981 | for (i = 0; i < eccfrag_len ; i += chip->ecc.bytes, p += chip->ecc.size) { |
| 982 | int stat; |
| 983 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 984 | stat = chip->ecc.correct(mtd, p, |
| 985 | &chip->buffers->ecccode[i], &chip->buffers->ecccalc[i]); |
| 986 | if (stat < 0) |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 987 | mtd->ecc_stats.failed++; |
| 988 | else |
| 989 | mtd->ecc_stats.corrected += stat; |
| 990 | } |
| 991 | return 0; |
| 992 | } |
| 993 | |
| 994 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 995 | * nand_read_page_hwecc - [REPLACABLE] hardware ecc based page read function |
| 996 | * @mtd: mtd info structure |
| 997 | * @chip: nand chip info structure |
| 998 | * @buf: buffer to store read data |
Sandeep Paulraj | 22bc7ba | 2009-11-07 14:24:50 -0500 | [diff] [blame] | 999 | * @page: page number to read |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1000 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1001 | * Not for syndrome calculating ecc controllers which need a special oob layout |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1002 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1003 | static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, |
Sandeep Paulraj | 883189e | 2009-08-10 13:27:46 -0400 | [diff] [blame] | 1004 | uint8_t *buf, int page) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1005 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1006 | int i, eccsize = chip->ecc.size; |
| 1007 | int eccbytes = chip->ecc.bytes; |
| 1008 | int eccsteps = chip->ecc.steps; |
| 1009 | uint8_t *p = buf; |
| 1010 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 1011 | uint8_t *ecc_code = chip->buffers->ecccode; |
| 1012 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1013 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1014 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1015 | chip->ecc.hwctl(mtd, NAND_ECC_READ); |
| 1016 | chip->read_buf(mtd, p, eccsize); |
| 1017 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
| 1018 | } |
| 1019 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1020 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1021 | for (i = 0; i < chip->ecc.total; i++) |
| 1022 | ecc_code[i] = chip->oob_poi[eccpos[i]]; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1023 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1024 | eccsteps = chip->ecc.steps; |
| 1025 | p = buf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1026 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1027 | for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1028 | int stat; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1029 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1030 | stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); |
Sandeep Paulraj | 16add23 | 2009-11-07 14:25:03 -0500 | [diff] [blame] | 1031 | if (stat < 0) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1032 | mtd->ecc_stats.failed++; |
| 1033 | else |
| 1034 | mtd->ecc_stats.corrected += stat; |
| 1035 | } |
| 1036 | return 0; |
| 1037 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1038 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1039 | /** |
Sandeep Paulraj | dea4070 | 2009-08-10 13:27:56 -0400 | [diff] [blame] | 1040 | * nand_read_page_hwecc_oob_first - [REPLACABLE] hw ecc, read oob first |
| 1041 | * @mtd: mtd info structure |
| 1042 | * @chip: nand chip info structure |
| 1043 | * @buf: buffer to store read data |
Sandeep Paulraj | 22bc7ba | 2009-11-07 14:24:50 -0500 | [diff] [blame] | 1044 | * @page: page number to read |
Sandeep Paulraj | dea4070 | 2009-08-10 13:27:56 -0400 | [diff] [blame] | 1045 | * |
| 1046 | * Hardware ECC for large page chips, require OOB to be read first. |
| 1047 | * For this ECC mode, the write_page method is re-used from ECC_HW. |
| 1048 | * These methods read/write ECC from the OOB area, unlike the |
| 1049 | * ECC_HW_SYNDROME support with multiple ECC steps, follows the |
| 1050 | * "infix ECC" scheme and reads/writes ECC from the data area, by |
| 1051 | * overwriting the NAND manufacturer bad block markings. |
| 1052 | */ |
| 1053 | static int nand_read_page_hwecc_oob_first(struct mtd_info *mtd, |
| 1054 | struct nand_chip *chip, uint8_t *buf, int page) |
| 1055 | { |
| 1056 | int i, eccsize = chip->ecc.size; |
| 1057 | int eccbytes = chip->ecc.bytes; |
| 1058 | int eccsteps = chip->ecc.steps; |
| 1059 | uint8_t *p = buf; |
| 1060 | uint8_t *ecc_code = chip->buffers->ecccode; |
| 1061 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
| 1062 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 1063 | |
| 1064 | /* Read the OOB area first */ |
| 1065 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); |
| 1066 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 1067 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); |
| 1068 | |
| 1069 | for (i = 0; i < chip->ecc.total; i++) |
| 1070 | ecc_code[i] = chip->oob_poi[eccpos[i]]; |
| 1071 | |
| 1072 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1073 | int stat; |
| 1074 | |
| 1075 | chip->ecc.hwctl(mtd, NAND_ECC_READ); |
| 1076 | chip->read_buf(mtd, p, eccsize); |
| 1077 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
| 1078 | |
| 1079 | stat = chip->ecc.correct(mtd, p, &ecc_code[i], NULL); |
| 1080 | if (stat < 0) |
| 1081 | mtd->ecc_stats.failed++; |
| 1082 | else |
| 1083 | mtd->ecc_stats.corrected += stat; |
| 1084 | } |
| 1085 | return 0; |
| 1086 | } |
| 1087 | |
| 1088 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1089 | * nand_read_page_syndrome - [REPLACABLE] hardware ecc syndrom based page read |
| 1090 | * @mtd: mtd info structure |
| 1091 | * @chip: nand chip info structure |
| 1092 | * @buf: buffer to store read data |
Sandeep Paulraj | 22bc7ba | 2009-11-07 14:24:50 -0500 | [diff] [blame] | 1093 | * @page: page number to read |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1094 | * |
| 1095 | * The hw generator calculates the error syndrome automatically. Therefor |
| 1096 | * we need a special oob layout and handling. |
| 1097 | */ |
| 1098 | static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, |
Sandeep Paulraj | 883189e | 2009-08-10 13:27:46 -0400 | [diff] [blame] | 1099 | uint8_t *buf, int page) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1100 | { |
| 1101 | int i, eccsize = chip->ecc.size; |
| 1102 | int eccbytes = chip->ecc.bytes; |
| 1103 | int eccsteps = chip->ecc.steps; |
| 1104 | uint8_t *p = buf; |
| 1105 | uint8_t *oob = chip->oob_poi; |
| 1106 | |
| 1107 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1108 | int stat; |
| 1109 | |
| 1110 | chip->ecc.hwctl(mtd, NAND_ECC_READ); |
| 1111 | chip->read_buf(mtd, p, eccsize); |
| 1112 | |
| 1113 | if (chip->ecc.prepad) { |
| 1114 | chip->read_buf(mtd, oob, chip->ecc.prepad); |
| 1115 | oob += chip->ecc.prepad; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1116 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1117 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1118 | chip->ecc.hwctl(mtd, NAND_ECC_READSYN); |
| 1119 | chip->read_buf(mtd, oob, eccbytes); |
| 1120 | stat = chip->ecc.correct(mtd, p, oob, NULL); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1121 | |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 1122 | if (stat < 0) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1123 | mtd->ecc_stats.failed++; |
| 1124 | else |
| 1125 | mtd->ecc_stats.corrected += stat; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1126 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1127 | oob += eccbytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1128 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1129 | if (chip->ecc.postpad) { |
| 1130 | chip->read_buf(mtd, oob, chip->ecc.postpad); |
| 1131 | oob += chip->ecc.postpad; |
| 1132 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1133 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1134 | |
| 1135 | /* Calculate remaining oob bytes */ |
| 1136 | i = mtd->oobsize - (oob - chip->oob_poi); |
| 1137 | if (i) |
| 1138 | chip->read_buf(mtd, oob, i); |
| 1139 | |
| 1140 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1141 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1142 | |
| 1143 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1144 | * nand_transfer_oob - [Internal] Transfer oob to client buffer |
| 1145 | * @chip: nand chip structure |
| 1146 | * @oob: oob destination address |
| 1147 | * @ops: oob ops structure |
| 1148 | * @len: size of oob to transfer |
| 1149 | */ |
| 1150 | static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, |
| 1151 | struct mtd_oob_ops *ops, size_t len) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1152 | { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1153 | switch (ops->mode) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1154 | |
| 1155 | case MTD_OOB_PLACE: |
| 1156 | case MTD_OOB_RAW: |
| 1157 | memcpy(oob, chip->oob_poi + ops->ooboffs, len); |
| 1158 | return oob + len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1159 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1160 | case MTD_OOB_AUTO: { |
| 1161 | struct nand_oobfree *free = chip->ecc.layout->oobfree; |
| 1162 | uint32_t boffs = 0, roffs = ops->ooboffs; |
| 1163 | size_t bytes = 0; |
| 1164 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1165 | for (; free->length && len; free++, len -= bytes) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1166 | /* Read request not from offset 0 ? */ |
| 1167 | if (unlikely(roffs)) { |
| 1168 | if (roffs >= free->length) { |
| 1169 | roffs -= free->length; |
| 1170 | continue; |
| 1171 | } |
| 1172 | boffs = free->offset + roffs; |
| 1173 | bytes = min_t(size_t, len, |
| 1174 | (free->length - roffs)); |
| 1175 | roffs = 0; |
| 1176 | } else { |
| 1177 | bytes = min_t(size_t, len, free->length); |
| 1178 | boffs = free->offset; |
| 1179 | } |
| 1180 | memcpy(oob, chip->oob_poi + boffs, bytes); |
| 1181 | oob += bytes; |
| 1182 | } |
| 1183 | return oob; |
| 1184 | } |
| 1185 | default: |
| 1186 | BUG(); |
| 1187 | } |
| 1188 | return NULL; |
| 1189 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1190 | |
| 1191 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1192 | * nand_do_read_ops - [Internal] Read data with ECC |
| 1193 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1194 | * @mtd: MTD device structure |
| 1195 | * @from: offset to read from |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1196 | * @ops: oob ops structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1197 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1198 | * Internal function. Called with chip held. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1199 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1200 | static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, |
| 1201 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1202 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1203 | int chipnr, page, realpage, col, bytes, aligned; |
| 1204 | struct nand_chip *chip = mtd->priv; |
| 1205 | struct mtd_ecc_stats stats; |
| 1206 | int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; |
| 1207 | int sndcmd = 1; |
| 1208 | int ret = 0; |
| 1209 | uint32_t readlen = ops->len; |
| 1210 | uint32_t oobreadlen = ops->ooblen; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1211 | uint32_t max_oobsize = ops->mode == MTD_OOB_AUTO ? |
| 1212 | mtd->oobavail : mtd->oobsize; |
| 1213 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1214 | uint8_t *bufpoi, *oob, *buf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1215 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1216 | stats = mtd->ecc_stats; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1217 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1218 | chipnr = (int)(from >> chip->chip_shift); |
| 1219 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1220 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1221 | realpage = (int)(from >> chip->page_shift); |
| 1222 | page = realpage & chip->pagemask; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1223 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1224 | col = (int)(from & (mtd->writesize - 1)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1225 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1226 | buf = ops->datbuf; |
| 1227 | oob = ops->oobbuf; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1228 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1229 | while (1) { |
Scott Wood | ea95b64 | 2011-02-02 18:15:57 -0600 | [diff] [blame] | 1230 | WATCHDOG_RESET(); |
| 1231 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1232 | bytes = min(mtd->writesize - col, readlen); |
| 1233 | aligned = (bytes == mtd->writesize); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1234 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1235 | /* Is the current page in the buffer ? */ |
| 1236 | if (realpage != chip->pagebuf || oob) { |
| 1237 | bufpoi = aligned ? buf : chip->buffers->databuf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1238 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1239 | if (likely(sndcmd)) { |
| 1240 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); |
| 1241 | sndcmd = 0; |
| 1242 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1243 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1244 | /* Now read the page into the buffer */ |
| 1245 | if (unlikely(ops->mode == MTD_OOB_RAW)) |
Sandeep Paulraj | 883189e | 2009-08-10 13:27:46 -0400 | [diff] [blame] | 1246 | ret = chip->ecc.read_page_raw(mtd, chip, |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1247 | bufpoi, page); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 1248 | else if (!aligned && NAND_SUBPAGE_READ(chip) && !oob) |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1249 | ret = chip->ecc.read_subpage(mtd, chip, |
| 1250 | col, bytes, bufpoi); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1251 | else |
Sandeep Paulraj | 883189e | 2009-08-10 13:27:46 -0400 | [diff] [blame] | 1252 | ret = chip->ecc.read_page(mtd, chip, bufpoi, |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1253 | page); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1254 | if (ret < 0) |
| 1255 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1256 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1257 | /* Transfer not aligned data */ |
| 1258 | if (!aligned) { |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1259 | if (!NAND_SUBPAGE_READ(chip) && !oob && |
| 1260 | !(mtd->ecc_stats.failed - stats.failed)) |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 1261 | chip->pagebuf = realpage; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1262 | memcpy(buf, chip->buffers->databuf + col, bytes); |
| 1263 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1264 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1265 | buf += bytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1266 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1267 | if (unlikely(oob)) { |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1268 | |
| 1269 | int toread = min(oobreadlen, max_oobsize); |
| 1270 | |
| 1271 | if (toread) { |
| 1272 | oob = nand_transfer_oob(chip, |
| 1273 | oob, ops, toread); |
| 1274 | oobreadlen -= toread; |
| 1275 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1276 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1277 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1278 | if (!(chip->options & NAND_NO_READRDY)) { |
| 1279 | /* |
| 1280 | * Apply delay or wait for ready/busy pin. Do |
| 1281 | * this before the AUTOINCR check, so no |
| 1282 | * problems arise if a chip which does auto |
| 1283 | * increment is marked as NOAUTOINCR by the |
| 1284 | * board driver. |
| 1285 | */ |
| 1286 | if (!chip->dev_ready) |
| 1287 | udelay(chip->chip_delay); |
| 1288 | else |
| 1289 | nand_wait_ready(mtd); |
| 1290 | } |
| 1291 | } else { |
| 1292 | memcpy(buf, chip->buffers->databuf + col, bytes); |
| 1293 | buf += bytes; |
| 1294 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1295 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1296 | readlen -= bytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1297 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1298 | if (!readlen) |
| 1299 | break; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1300 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1301 | /* For subsequent reads align to page boundary. */ |
| 1302 | col = 0; |
| 1303 | /* Increment page address */ |
| 1304 | realpage++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1305 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1306 | page = realpage & chip->pagemask; |
| 1307 | /* Check, if we cross a chip boundary */ |
| 1308 | if (!page) { |
| 1309 | chipnr++; |
| 1310 | chip->select_chip(mtd, -1); |
| 1311 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1312 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1313 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1314 | /* Check, if the chip supports auto page increment |
| 1315 | * or if we have hit a block boundary. |
| 1316 | */ |
| 1317 | if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) |
| 1318 | sndcmd = 1; |
| 1319 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1320 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1321 | ops->retlen = ops->len - (size_t) readlen; |
| 1322 | if (oob) |
| 1323 | ops->oobretlen = ops->ooblen - oobreadlen; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1324 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1325 | if (ret) |
| 1326 | return ret; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1327 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1328 | if (mtd->ecc_stats.failed - stats.failed) |
| 1329 | return -EBADMSG; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1330 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1331 | return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1332 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1333 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1334 | /** |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1335 | * nand_read - [MTD Interface] MTD compatibility function for nand_do_read_ecc |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1336 | * @mtd: MTD device structure |
| 1337 | * @from: offset to read from |
| 1338 | * @len: number of bytes to read |
| 1339 | * @retlen: pointer to variable to store the number of read bytes |
| 1340 | * @buf: the databuffer to put data |
| 1341 | * |
| 1342 | * Get hold of the chip and call nand_do_read |
| 1343 | */ |
| 1344 | static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 1345 | size_t *retlen, uint8_t *buf) |
| 1346 | { |
| 1347 | struct nand_chip *chip = mtd->priv; |
| 1348 | int ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1349 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1350 | /* Do not allow reads past end of device */ |
| 1351 | if ((from + len) > mtd->size) |
| 1352 | return -EINVAL; |
| 1353 | if (!len) |
| 1354 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1355 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1356 | nand_get_device(chip, mtd, FL_READING); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1357 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1358 | chip->ops.len = len; |
| 1359 | chip->ops.datbuf = buf; |
| 1360 | chip->ops.oobbuf = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1361 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1362 | ret = nand_do_read_ops(mtd, from, &chip->ops); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1363 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1364 | *retlen = chip->ops.retlen; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1365 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1366 | nand_release_device(mtd); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1367 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1368 | return ret; |
| 1369 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1370 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1371 | /** |
| 1372 | * nand_read_oob_std - [REPLACABLE] the most common OOB data read function |
| 1373 | * @mtd: mtd info structure |
| 1374 | * @chip: nand chip info structure |
| 1375 | * @page: page number to read |
| 1376 | * @sndcmd: flag whether to issue read command or not |
| 1377 | */ |
| 1378 | static int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, |
| 1379 | int page, int sndcmd) |
| 1380 | { |
| 1381 | if (sndcmd) { |
| 1382 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); |
| 1383 | sndcmd = 0; |
| 1384 | } |
| 1385 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 1386 | return sndcmd; |
| 1387 | } |
| 1388 | |
| 1389 | /** |
| 1390 | * nand_read_oob_syndrome - [REPLACABLE] OOB data read function for HW ECC |
| 1391 | * with syndromes |
| 1392 | * @mtd: mtd info structure |
| 1393 | * @chip: nand chip info structure |
| 1394 | * @page: page number to read |
| 1395 | * @sndcmd: flag whether to issue read command or not |
| 1396 | */ |
| 1397 | static int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip, |
| 1398 | int page, int sndcmd) |
| 1399 | { |
| 1400 | uint8_t *buf = chip->oob_poi; |
| 1401 | int length = mtd->oobsize; |
| 1402 | int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; |
| 1403 | int eccsize = chip->ecc.size; |
| 1404 | uint8_t *bufpoi = buf; |
| 1405 | int i, toread, sndrnd = 0, pos; |
| 1406 | |
| 1407 | chip->cmdfunc(mtd, NAND_CMD_READ0, chip->ecc.size, page); |
| 1408 | for (i = 0; i < chip->ecc.steps; i++) { |
| 1409 | if (sndrnd) { |
| 1410 | pos = eccsize + i * (eccsize + chunk); |
| 1411 | if (mtd->writesize > 512) |
| 1412 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, pos, -1); |
| 1413 | else |
| 1414 | chip->cmdfunc(mtd, NAND_CMD_READ0, pos, page); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1415 | } else |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1416 | sndrnd = 1; |
| 1417 | toread = min_t(int, length, chunk); |
| 1418 | chip->read_buf(mtd, bufpoi, toread); |
| 1419 | bufpoi += toread; |
| 1420 | length -= toread; |
| 1421 | } |
| 1422 | if (length > 0) |
| 1423 | chip->read_buf(mtd, bufpoi, length); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1424 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1425 | return 1; |
| 1426 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1427 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1428 | /** |
| 1429 | * nand_write_oob_std - [REPLACABLE] the most common OOB data write function |
| 1430 | * @mtd: mtd info structure |
| 1431 | * @chip: nand chip info structure |
| 1432 | * @page: page number to write |
| 1433 | */ |
| 1434 | static int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip, |
| 1435 | int page) |
| 1436 | { |
| 1437 | int status = 0; |
| 1438 | const uint8_t *buf = chip->oob_poi; |
| 1439 | int length = mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1440 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1441 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page); |
| 1442 | chip->write_buf(mtd, buf, length); |
| 1443 | /* Send command to program the OOB data */ |
| 1444 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1445 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1446 | status = chip->waitfunc(mtd, chip); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1447 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1448 | return status & NAND_STATUS_FAIL ? -EIO : 0; |
| 1449 | } |
| 1450 | |
| 1451 | /** |
| 1452 | * nand_write_oob_syndrome - [REPLACABLE] OOB data write function for HW ECC |
| 1453 | * with syndrome - only for large page flash ! |
| 1454 | * @mtd: mtd info structure |
| 1455 | * @chip: nand chip info structure |
| 1456 | * @page: page number to write |
| 1457 | */ |
| 1458 | static int nand_write_oob_syndrome(struct mtd_info *mtd, |
| 1459 | struct nand_chip *chip, int page) |
| 1460 | { |
| 1461 | int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; |
| 1462 | int eccsize = chip->ecc.size, length = mtd->oobsize; |
| 1463 | int i, len, pos, status = 0, sndcmd = 0, steps = chip->ecc.steps; |
| 1464 | const uint8_t *bufpoi = chip->oob_poi; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1465 | |
| 1466 | /* |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1467 | * data-ecc-data-ecc ... ecc-oob |
| 1468 | * or |
| 1469 | * data-pad-ecc-pad-data-pad .... ecc-pad-oob |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1470 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1471 | if (!chip->ecc.prepad && !chip->ecc.postpad) { |
| 1472 | pos = steps * (eccsize + chunk); |
| 1473 | steps = 0; |
| 1474 | } else |
| 1475 | pos = eccsize; |
| 1476 | |
| 1477 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page); |
| 1478 | for (i = 0; i < steps; i++) { |
| 1479 | if (sndcmd) { |
| 1480 | if (mtd->writesize <= 512) { |
| 1481 | uint32_t fill = 0xFFFFFFFF; |
| 1482 | |
| 1483 | len = eccsize; |
| 1484 | while (len > 0) { |
| 1485 | int num = min_t(int, len, 4); |
| 1486 | chip->write_buf(mtd, (uint8_t *)&fill, |
| 1487 | num); |
| 1488 | len -= num; |
| 1489 | } |
| 1490 | } else { |
| 1491 | pos = eccsize + i * (eccsize + chunk); |
| 1492 | chip->cmdfunc(mtd, NAND_CMD_RNDIN, pos, -1); |
| 1493 | } |
| 1494 | } else |
| 1495 | sndcmd = 1; |
| 1496 | len = min_t(int, length, chunk); |
| 1497 | chip->write_buf(mtd, bufpoi, len); |
| 1498 | bufpoi += len; |
| 1499 | length -= len; |
| 1500 | } |
| 1501 | if (length > 0) |
| 1502 | chip->write_buf(mtd, bufpoi, length); |
| 1503 | |
| 1504 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
| 1505 | status = chip->waitfunc(mtd, chip); |
| 1506 | |
| 1507 | return status & NAND_STATUS_FAIL ? -EIO : 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1508 | } |
| 1509 | |
| 1510 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1511 | * nand_do_read_oob - [Intern] NAND read out-of-band |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1512 | * @mtd: MTD device structure |
| 1513 | * @from: offset to read from |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1514 | * @ops: oob operations description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1515 | * |
| 1516 | * NAND read out-of-band data from the spare area |
| 1517 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1518 | static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, |
| 1519 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1520 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1521 | int page, realpage, chipnr, sndcmd = 1; |
| 1522 | struct nand_chip *chip = mtd->priv; |
| 1523 | int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; |
| 1524 | int readlen = ops->ooblen; |
| 1525 | int len; |
| 1526 | uint8_t *buf = ops->oobbuf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1527 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1528 | MTDDEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08Lx, len = %i\n", |
| 1529 | __func__, (unsigned long long)from, readlen); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1530 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1531 | if (ops->mode == MTD_OOB_AUTO) |
| 1532 | len = chip->ecc.layout->oobavail; |
| 1533 | else |
| 1534 | len = mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1535 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1536 | if (unlikely(ops->ooboffs >= len)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1537 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to start read " |
| 1538 | "outside oob\n", __func__); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1539 | return -EINVAL; |
| 1540 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1541 | |
| 1542 | /* Do not allow reads past end of device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1543 | if (unlikely(from >= mtd->size || |
| 1544 | ops->ooboffs + readlen > ((mtd->size >> chip->page_shift) - |
| 1545 | (from >> chip->page_shift)) * len)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1546 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt read beyond end " |
| 1547 | "of device\n", __func__); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1548 | return -EINVAL; |
| 1549 | } |
| 1550 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1551 | chipnr = (int)(from >> chip->chip_shift); |
| 1552 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1553 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1554 | /* Shift to get page */ |
| 1555 | realpage = (int)(from >> chip->page_shift); |
| 1556 | page = realpage & chip->pagemask; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1557 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1558 | while (1) { |
Scott Wood | ea95b64 | 2011-02-02 18:15:57 -0600 | [diff] [blame] | 1559 | WATCHDOG_RESET(); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1560 | sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1561 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1562 | len = min(len, readlen); |
| 1563 | buf = nand_transfer_oob(chip, buf, ops, len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1564 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1565 | if (!(chip->options & NAND_NO_READRDY)) { |
| 1566 | /* |
| 1567 | * Apply delay or wait for ready/busy pin. Do this |
| 1568 | * before the AUTOINCR check, so no problems arise if a |
| 1569 | * chip which does auto increment is marked as |
| 1570 | * NOAUTOINCR by the board driver. |
| 1571 | */ |
| 1572 | if (!chip->dev_ready) |
| 1573 | udelay(chip->chip_delay); |
| 1574 | else |
| 1575 | nand_wait_ready(mtd); |
| 1576 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1577 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1578 | readlen -= len; |
| 1579 | if (!readlen) |
| 1580 | break; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1581 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1582 | /* Increment page address */ |
| 1583 | realpage++; |
| 1584 | |
| 1585 | page = realpage & chip->pagemask; |
| 1586 | /* Check, if we cross a chip boundary */ |
| 1587 | if (!page) { |
| 1588 | chipnr++; |
| 1589 | chip->select_chip(mtd, -1); |
| 1590 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1591 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1592 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1593 | /* Check, if the chip supports auto page increment |
| 1594 | * or if we have hit a block boundary. |
| 1595 | */ |
| 1596 | if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) |
| 1597 | sndcmd = 1; |
| 1598 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1599 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1600 | ops->oobretlen = ops->ooblen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1601 | return 0; |
| 1602 | } |
| 1603 | |
| 1604 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1605 | * nand_read_oob - [MTD Interface] NAND read data and/or out-of-band |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1606 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1607 | * @from: offset to read from |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1608 | * @ops: oob operation description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1609 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1610 | * NAND read data and/or out-of-band data |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1611 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1612 | static int nand_read_oob(struct mtd_info *mtd, loff_t from, |
| 1613 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1614 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1615 | struct nand_chip *chip = mtd->priv; |
| 1616 | int ret = -ENOTSUPP; |
| 1617 | |
| 1618 | ops->retlen = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1619 | |
| 1620 | /* Do not allow reads past end of device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1621 | if (ops->datbuf && (from + ops->len) > mtd->size) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1622 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt read " |
| 1623 | "beyond end of device\n", __func__); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1624 | return -EINVAL; |
| 1625 | } |
| 1626 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1627 | nand_get_device(chip, mtd, FL_READING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1628 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1629 | switch (ops->mode) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1630 | case MTD_OOB_PLACE: |
| 1631 | case MTD_OOB_AUTO: |
| 1632 | case MTD_OOB_RAW: |
| 1633 | break; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1634 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1635 | default: |
| 1636 | goto out; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1637 | } |
| 1638 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1639 | if (!ops->datbuf) |
| 1640 | ret = nand_do_read_oob(mtd, from, ops); |
| 1641 | else |
| 1642 | ret = nand_do_read_ops(mtd, from, ops); |
| 1643 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1644 | out: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1645 | nand_release_device(mtd); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1646 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1647 | } |
| 1648 | |
| 1649 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1650 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1651 | * nand_write_page_raw - [Intern] raw page write function |
| 1652 | * @mtd: mtd info structure |
| 1653 | * @chip: nand chip info structure |
| 1654 | * @buf: data buffer |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 1655 | * |
| 1656 | * Not for syndrome calculating ecc controllers, which use a special oob layout |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1657 | */ |
| 1658 | static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, |
| 1659 | const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1660 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1661 | chip->write_buf(mtd, buf, mtd->writesize); |
| 1662 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 1663 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1664 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1665 | /** |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 1666 | * nand_write_page_raw_syndrome - [Intern] raw page write function |
| 1667 | * @mtd: mtd info structure |
| 1668 | * @chip: nand chip info structure |
| 1669 | * @buf: data buffer |
| 1670 | * |
| 1671 | * We need a special oob layout and handling even when ECC isn't checked. |
| 1672 | */ |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1673 | static void nand_write_page_raw_syndrome(struct mtd_info *mtd, |
| 1674 | struct nand_chip *chip, |
| 1675 | const uint8_t *buf) |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 1676 | { |
| 1677 | int eccsize = chip->ecc.size; |
| 1678 | int eccbytes = chip->ecc.bytes; |
| 1679 | uint8_t *oob = chip->oob_poi; |
| 1680 | int steps, size; |
| 1681 | |
| 1682 | for (steps = chip->ecc.steps; steps > 0; steps--) { |
| 1683 | chip->write_buf(mtd, buf, eccsize); |
| 1684 | buf += eccsize; |
| 1685 | |
| 1686 | if (chip->ecc.prepad) { |
| 1687 | chip->write_buf(mtd, oob, chip->ecc.prepad); |
| 1688 | oob += chip->ecc.prepad; |
| 1689 | } |
| 1690 | |
| 1691 | chip->read_buf(mtd, oob, eccbytes); |
| 1692 | oob += eccbytes; |
| 1693 | |
| 1694 | if (chip->ecc.postpad) { |
| 1695 | chip->write_buf(mtd, oob, chip->ecc.postpad); |
| 1696 | oob += chip->ecc.postpad; |
| 1697 | } |
| 1698 | } |
| 1699 | |
| 1700 | size = mtd->oobsize - (oob - chip->oob_poi); |
| 1701 | if (size) |
| 1702 | chip->write_buf(mtd, oob, size); |
| 1703 | } |
| 1704 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1705 | * nand_write_page_swecc - [REPLACABLE] software ecc based page write function |
| 1706 | * @mtd: mtd info structure |
| 1707 | * @chip: nand chip info structure |
| 1708 | * @buf: data buffer |
| 1709 | */ |
| 1710 | static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, |
| 1711 | const uint8_t *buf) |
| 1712 | { |
| 1713 | int i, eccsize = chip->ecc.size; |
| 1714 | int eccbytes = chip->ecc.bytes; |
| 1715 | int eccsteps = chip->ecc.steps; |
| 1716 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 1717 | const uint8_t *p = buf; |
| 1718 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1719 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1720 | /* Software ecc calculation */ |
| 1721 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) |
| 1722 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1723 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1724 | for (i = 0; i < chip->ecc.total; i++) |
| 1725 | chip->oob_poi[eccpos[i]] = ecc_calc[i]; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1726 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1727 | chip->ecc.write_page_raw(mtd, chip, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1728 | } |
| 1729 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1730 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1731 | * nand_write_page_hwecc - [REPLACABLE] hardware ecc based page write function |
| 1732 | * @mtd: mtd info structure |
| 1733 | * @chip: nand chip info structure |
| 1734 | * @buf: data buffer |
| 1735 | */ |
| 1736 | static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, |
| 1737 | const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1738 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1739 | int i, eccsize = chip->ecc.size; |
| 1740 | int eccbytes = chip->ecc.bytes; |
| 1741 | int eccsteps = chip->ecc.steps; |
| 1742 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 1743 | const uint8_t *p = buf; |
| 1744 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
| 1745 | |
| 1746 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1747 | chip->ecc.hwctl(mtd, NAND_ECC_WRITE); |
| 1748 | chip->write_buf(mtd, p, eccsize); |
| 1749 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
| 1750 | } |
| 1751 | |
| 1752 | for (i = 0; i < chip->ecc.total; i++) |
| 1753 | chip->oob_poi[eccpos[i]] = ecc_calc[i]; |
| 1754 | |
| 1755 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1756 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1757 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1758 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1759 | * nand_write_page_syndrome - [REPLACABLE] hardware ecc syndrom based page write |
| 1760 | * @mtd: mtd info structure |
| 1761 | * @chip: nand chip info structure |
| 1762 | * @buf: data buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1763 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1764 | * The hw generator calculates the error syndrome automatically. Therefor |
| 1765 | * we need a special oob layout and handling. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1766 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1767 | static void nand_write_page_syndrome(struct mtd_info *mtd, |
| 1768 | struct nand_chip *chip, const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1769 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1770 | int i, eccsize = chip->ecc.size; |
| 1771 | int eccbytes = chip->ecc.bytes; |
| 1772 | int eccsteps = chip->ecc.steps; |
| 1773 | const uint8_t *p = buf; |
| 1774 | uint8_t *oob = chip->oob_poi; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1775 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1776 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1777 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1778 | chip->ecc.hwctl(mtd, NAND_ECC_WRITE); |
| 1779 | chip->write_buf(mtd, p, eccsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1780 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1781 | if (chip->ecc.prepad) { |
| 1782 | chip->write_buf(mtd, oob, chip->ecc.prepad); |
| 1783 | oob += chip->ecc.prepad; |
| 1784 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1785 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1786 | chip->ecc.calculate(mtd, p, oob); |
| 1787 | chip->write_buf(mtd, oob, eccbytes); |
| 1788 | oob += eccbytes; |
| 1789 | |
| 1790 | if (chip->ecc.postpad) { |
| 1791 | chip->write_buf(mtd, oob, chip->ecc.postpad); |
| 1792 | oob += chip->ecc.postpad; |
| 1793 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1794 | } |
| 1795 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1796 | /* Calculate remaining oob bytes */ |
| 1797 | i = mtd->oobsize - (oob - chip->oob_poi); |
| 1798 | if (i) |
| 1799 | chip->write_buf(mtd, oob, i); |
| 1800 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1801 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1802 | /** |
| 1803 | * nand_write_page - [REPLACEABLE] write one page |
| 1804 | * @mtd: MTD device structure |
| 1805 | * @chip: NAND chip descriptor |
| 1806 | * @buf: the data to write |
| 1807 | * @page: page number to write |
| 1808 | * @cached: cached programming |
| 1809 | * @raw: use _raw version of write_page |
| 1810 | */ |
| 1811 | static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, |
| 1812 | const uint8_t *buf, int page, int cached, int raw) |
| 1813 | { |
| 1814 | int status; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1815 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1816 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); |
| 1817 | |
| 1818 | if (unlikely(raw)) |
| 1819 | chip->ecc.write_page_raw(mtd, chip, buf); |
| 1820 | else |
| 1821 | chip->ecc.write_page(mtd, chip, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1822 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1823 | /* |
| 1824 | * Cached progamming disabled for now, Not sure if its worth the |
| 1825 | * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s) |
| 1826 | */ |
| 1827 | cached = 0; |
| 1828 | |
| 1829 | if (!cached || !(chip->options & NAND_CACHEPRG)) { |
| 1830 | |
| 1831 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
| 1832 | status = chip->waitfunc(mtd, chip); |
| 1833 | /* |
| 1834 | * See if operation failed and additional status checks are |
| 1835 | * available |
| 1836 | */ |
| 1837 | if ((status & NAND_STATUS_FAIL) && (chip->errstat)) |
| 1838 | status = chip->errstat(mtd, chip, FL_WRITING, status, |
| 1839 | page); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1840 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1841 | if (status & NAND_STATUS_FAIL) |
| 1842 | return -EIO; |
| 1843 | } else { |
| 1844 | chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1); |
| 1845 | status = chip->waitfunc(mtd, chip); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1846 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1847 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1848 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE |
| 1849 | /* Send command to read back the data */ |
| 1850 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1851 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1852 | if (chip->verify_buf(mtd, buf, mtd->writesize)) |
| 1853 | return -EIO; |
| 1854 | #endif |
| 1855 | return 0; |
| 1856 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1857 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1858 | /** |
| 1859 | * nand_fill_oob - [Internal] Transfer client buffer to oob |
| 1860 | * @chip: nand chip structure |
| 1861 | * @oob: oob data buffer |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1862 | * @len: oob data write length |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1863 | * @ops: oob ops structure |
| 1864 | */ |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1865 | static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob, size_t len, |
| 1866 | struct mtd_oob_ops *ops) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1867 | { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1868 | switch (ops->mode) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1869 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1870 | case MTD_OOB_PLACE: |
| 1871 | case MTD_OOB_RAW: |
| 1872 | memcpy(chip->oob_poi + ops->ooboffs, oob, len); |
| 1873 | return oob + len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1874 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1875 | case MTD_OOB_AUTO: { |
| 1876 | struct nand_oobfree *free = chip->ecc.layout->oobfree; |
| 1877 | uint32_t boffs = 0, woffs = ops->ooboffs; |
| 1878 | size_t bytes = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1879 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1880 | for (; free->length && len; free++, len -= bytes) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1881 | /* Write request not from offset 0 ? */ |
| 1882 | if (unlikely(woffs)) { |
| 1883 | if (woffs >= free->length) { |
| 1884 | woffs -= free->length; |
| 1885 | continue; |
| 1886 | } |
| 1887 | boffs = free->offset + woffs; |
| 1888 | bytes = min_t(size_t, len, |
| 1889 | (free->length - woffs)); |
| 1890 | woffs = 0; |
| 1891 | } else { |
| 1892 | bytes = min_t(size_t, len, free->length); |
| 1893 | boffs = free->offset; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1894 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1895 | memcpy(chip->oob_poi + boffs, oob, bytes); |
| 1896 | oob += bytes; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1897 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1898 | return oob; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1899 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1900 | default: |
| 1901 | BUG(); |
| 1902 | } |
| 1903 | return NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1904 | } |
| 1905 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1906 | #define NOTALIGNED(x) ((x & (chip->subpagesize - 1)) != 0) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1907 | |
| 1908 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1909 | * nand_do_write_ops - [Internal] NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1910 | * @mtd: MTD device structure |
| 1911 | * @to: offset to write to |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1912 | * @ops: oob operations description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1913 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1914 | * NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1915 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1916 | static int nand_do_write_ops(struct mtd_info *mtd, loff_t to, |
| 1917 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1918 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1919 | int chipnr, realpage, page, blockmask, column; |
| 1920 | struct nand_chip *chip = mtd->priv; |
| 1921 | uint32_t writelen = ops->len; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1922 | |
| 1923 | uint32_t oobwritelen = ops->ooblen; |
| 1924 | uint32_t oobmaxlen = ops->mode == MTD_OOB_AUTO ? |
| 1925 | mtd->oobavail : mtd->oobsize; |
| 1926 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1927 | uint8_t *oob = ops->oobbuf; |
| 1928 | uint8_t *buf = ops->datbuf; |
| 1929 | int ret, subpage; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1930 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1931 | ops->retlen = 0; |
| 1932 | if (!writelen) |
| 1933 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1934 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1935 | column = to & (mtd->writesize - 1); |
| 1936 | subpage = column || (writelen & (mtd->writesize - 1)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1937 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1938 | if (subpage && oob) |
| 1939 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1940 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1941 | chipnr = (int)(to >> chip->chip_shift); |
| 1942 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1943 | |
| 1944 | /* Check, if it is write protected */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1945 | if (nand_check_wp(mtd)) { |
| 1946 | printk (KERN_NOTICE "nand_do_write_ops: Device is write protected\n"); |
| 1947 | return -EIO; |
| 1948 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1949 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1950 | realpage = (int)(to >> chip->page_shift); |
| 1951 | page = realpage & chip->pagemask; |
| 1952 | blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1953 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1954 | /* Invalidate the page cache, when we write to the cached page */ |
| 1955 | if (to <= (chip->pagebuf << chip->page_shift) && |
| 1956 | (chip->pagebuf << chip->page_shift) < (to + ops->len)) |
| 1957 | chip->pagebuf = -1; |
| 1958 | |
| 1959 | /* If we're not given explicit OOB data, let it be 0xFF */ |
| 1960 | if (likely(!oob)) |
| 1961 | memset(chip->oob_poi, 0xff, mtd->oobsize); |
| 1962 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1963 | /* Don't allow multipage oob writes with offset */ |
| 1964 | if (oob && ops->ooboffs && (ops->ooboffs + ops->ooblen > oobmaxlen)) |
| 1965 | return -EINVAL; |
| 1966 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 1967 | while (1) { |
Scott Wood | ea95b64 | 2011-02-02 18:15:57 -0600 | [diff] [blame] | 1968 | WATCHDOG_RESET(); |
| 1969 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1970 | int bytes = mtd->writesize; |
| 1971 | int cached = writelen > bytes && page != blockmask; |
| 1972 | uint8_t *wbuf = buf; |
| 1973 | |
| 1974 | /* Partial page write ? */ |
| 1975 | if (unlikely(column || writelen < (mtd->writesize - 1))) { |
| 1976 | cached = 0; |
| 1977 | bytes = min_t(int, bytes - column, (int) writelen); |
| 1978 | chip->pagebuf = -1; |
| 1979 | memset(chip->buffers->databuf, 0xff, mtd->writesize); |
| 1980 | memcpy(&chip->buffers->databuf[column], buf, bytes); |
| 1981 | wbuf = chip->buffers->databuf; |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 1982 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1983 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 1984 | if (unlikely(oob)) { |
| 1985 | size_t len = min(oobwritelen, oobmaxlen); |
| 1986 | oob = nand_fill_oob(chip, oob, len, ops); |
| 1987 | oobwritelen -= len; |
| 1988 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1989 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1990 | ret = chip->write_page(mtd, chip, wbuf, page, cached, |
| 1991 | (ops->mode == MTD_OOB_RAW)); |
| 1992 | if (ret) |
| 1993 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1994 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1995 | writelen -= bytes; |
| 1996 | if (!writelen) |
| 1997 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1998 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1999 | column = 0; |
| 2000 | buf += bytes; |
| 2001 | realpage++; |
| 2002 | |
| 2003 | page = realpage & chip->pagemask; |
| 2004 | /* Check, if we cross a chip boundary */ |
| 2005 | if (!page) { |
| 2006 | chipnr++; |
| 2007 | chip->select_chip(mtd, -1); |
| 2008 | chip->select_chip(mtd, chipnr); |
| 2009 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2010 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2011 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2012 | ops->retlen = ops->len - writelen; |
| 2013 | if (unlikely(oob)) |
| 2014 | ops->oobretlen = ops->ooblen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2015 | return ret; |
| 2016 | } |
| 2017 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2018 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2019 | * nand_write - [MTD Interface] NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2020 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2021 | * @to: offset to write to |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2022 | * @len: number of bytes to write |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2023 | * @retlen: pointer to variable to store the number of written bytes |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2024 | * @buf: the data to write |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2025 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2026 | * NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2027 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2028 | static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 2029 | size_t *retlen, const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2030 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2031 | struct nand_chip *chip = mtd->priv; |
| 2032 | int ret; |
| 2033 | |
Ben Gardiner | 2c489ac | 2011-05-24 10:18:34 -0400 | [diff] [blame] | 2034 | /* Do not allow writes past end of device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2035 | if ((to + len) > mtd->size) |
| 2036 | return -EINVAL; |
| 2037 | if (!len) |
| 2038 | return 0; |
| 2039 | |
| 2040 | nand_get_device(chip, mtd, FL_WRITING); |
| 2041 | |
| 2042 | chip->ops.len = len; |
| 2043 | chip->ops.datbuf = (uint8_t *)buf; |
| 2044 | chip->ops.oobbuf = NULL; |
| 2045 | |
| 2046 | ret = nand_do_write_ops(mtd, to, &chip->ops); |
| 2047 | |
| 2048 | *retlen = chip->ops.retlen; |
| 2049 | |
| 2050 | nand_release_device(mtd); |
| 2051 | |
| 2052 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2053 | } |
| 2054 | |
| 2055 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2056 | * nand_do_write_oob - [MTD Interface] NAND write out-of-band |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2057 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2058 | * @to: offset to write to |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2059 | * @ops: oob operation description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2060 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2061 | * NAND write out-of-band |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2062 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2063 | static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, |
| 2064 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2065 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2066 | int chipnr, page, status, len; |
| 2067 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2068 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2069 | MTDDEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n", |
| 2070 | __func__, (unsigned int)to, (int)ops->ooblen); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2071 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2072 | if (ops->mode == MTD_OOB_AUTO) |
| 2073 | len = chip->ecc.layout->oobavail; |
| 2074 | else |
| 2075 | len = mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2076 | |
| 2077 | /* Do not allow write past end of page */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2078 | if ((ops->ooboffs + ops->ooblen) > len) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2079 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to write " |
| 2080 | "past end of page\n", __func__); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2081 | return -EINVAL; |
| 2082 | } |
| 2083 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2084 | if (unlikely(ops->ooboffs >= len)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2085 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt to start " |
| 2086 | "write outside oob\n", __func__); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2087 | return -EINVAL; |
| 2088 | } |
| 2089 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2090 | /* Do not allow write past end of device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2091 | if (unlikely(to >= mtd->size || |
| 2092 | ops->ooboffs + ops->ooblen > |
| 2093 | ((mtd->size >> chip->page_shift) - |
| 2094 | (to >> chip->page_shift)) * len)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2095 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt write beyond " |
| 2096 | "end of device\n", __func__); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2097 | return -EINVAL; |
| 2098 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2099 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2100 | chipnr = (int)(to >> chip->chip_shift); |
| 2101 | chip->select_chip(mtd, chipnr); |
| 2102 | |
| 2103 | /* Shift to get page */ |
| 2104 | page = (int)(to >> chip->page_shift); |
| 2105 | |
| 2106 | /* |
| 2107 | * Reset the chip. Some chips (like the Toshiba TC5832DC found in one |
| 2108 | * of my DiskOnChip 2000 test units) will clear the whole data page too |
| 2109 | * if we don't do this. I have no clue why, but I seem to have 'fixed' |
| 2110 | * it in the doc2000 driver in August 1999. dwmw2. |
| 2111 | */ |
| 2112 | chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2113 | |
| 2114 | /* Check, if it is write protected */ |
| 2115 | if (nand_check_wp(mtd)) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2116 | return -EROFS; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2117 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2118 | /* Invalidate the page cache, if we write to the cached page */ |
| 2119 | if (page == chip->pagebuf) |
| 2120 | chip->pagebuf = -1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2121 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2122 | memset(chip->oob_poi, 0xff, mtd->oobsize); |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2123 | nand_fill_oob(chip, ops->oobbuf, ops->ooblen, ops); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2124 | status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask); |
| 2125 | memset(chip->oob_poi, 0xff, mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2126 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2127 | if (status) |
| 2128 | return status; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2129 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2130 | ops->oobretlen = ops->ooblen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2131 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2132 | return 0; |
| 2133 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2134 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2135 | /** |
| 2136 | * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band |
| 2137 | * @mtd: MTD device structure |
| 2138 | * @to: offset to write to |
| 2139 | * @ops: oob operation description structure |
| 2140 | */ |
| 2141 | static int nand_write_oob(struct mtd_info *mtd, loff_t to, |
| 2142 | struct mtd_oob_ops *ops) |
| 2143 | { |
| 2144 | struct nand_chip *chip = mtd->priv; |
| 2145 | int ret = -ENOTSUPP; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2146 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2147 | ops->retlen = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2148 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2149 | /* Do not allow writes past end of device */ |
| 2150 | if (ops->datbuf && (to + ops->len) > mtd->size) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2151 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Attempt write beyond " |
| 2152 | "end of device\n", __func__); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2153 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2154 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2155 | |
| 2156 | nand_get_device(chip, mtd, FL_WRITING); |
| 2157 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2158 | switch (ops->mode) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2159 | case MTD_OOB_PLACE: |
| 2160 | case MTD_OOB_AUTO: |
| 2161 | case MTD_OOB_RAW: |
| 2162 | break; |
| 2163 | |
| 2164 | default: |
| 2165 | goto out; |
| 2166 | } |
| 2167 | |
| 2168 | if (!ops->datbuf) |
| 2169 | ret = nand_do_write_oob(mtd, to, ops); |
| 2170 | else |
| 2171 | ret = nand_do_write_ops(mtd, to, ops); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2172 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2173 | out: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2174 | nand_release_device(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2175 | return ret; |
| 2176 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2177 | |
| 2178 | /** |
| 2179 | * single_erease_cmd - [GENERIC] NAND standard block erase command function |
| 2180 | * @mtd: MTD device structure |
| 2181 | * @page: the page address of the block which will be erased |
| 2182 | * |
| 2183 | * Standard erase command for NAND chips |
| 2184 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2185 | static void single_erase_cmd(struct mtd_info *mtd, int page) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2186 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2187 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2188 | /* Send commands to erase a block */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2189 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); |
| 2190 | chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2191 | } |
| 2192 | |
| 2193 | /** |
| 2194 | * multi_erease_cmd - [GENERIC] AND specific block erase command function |
| 2195 | * @mtd: MTD device structure |
| 2196 | * @page: the page address of the block which will be erased |
| 2197 | * |
| 2198 | * AND multi block erase command function |
| 2199 | * Erase 4 consecutive blocks |
| 2200 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2201 | static void multi_erase_cmd(struct mtd_info *mtd, int page) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2202 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2203 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2204 | /* Send commands to erase a block */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2205 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
| 2206 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
| 2207 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
| 2208 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); |
| 2209 | chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2210 | } |
| 2211 | |
| 2212 | /** |
| 2213 | * nand_erase - [MTD Interface] erase block(s) |
| 2214 | * @mtd: MTD device structure |
| 2215 | * @instr: erase instruction |
| 2216 | * |
| 2217 | * Erase one ore more blocks |
| 2218 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2219 | static int nand_erase(struct mtd_info *mtd, struct erase_info *instr) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2220 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2221 | return nand_erase_nand(mtd, instr, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2222 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2223 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2224 | #define BBT_PAGE_MASK 0xffffff3f |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2225 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2226 | * nand_erase_nand - [Internal] erase block(s) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2227 | * @mtd: MTD device structure |
| 2228 | * @instr: erase instruction |
| 2229 | * @allowbbt: allow erasing the bbt area |
| 2230 | * |
| 2231 | * Erase one ore more blocks |
| 2232 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2233 | int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, |
| 2234 | int allowbbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2235 | { |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 2236 | int page, status, pages_per_block, ret, chipnr; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2237 | struct nand_chip *chip = mtd->priv; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 2238 | loff_t rewrite_bbt[CONFIG_SYS_NAND_MAX_CHIPS] = {0}; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2239 | unsigned int bbt_masked_page = 0xffffffff; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 2240 | loff_t len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2241 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2242 | MTDDEBUG(MTD_DEBUG_LEVEL3, "%s: start = 0x%012llx, len = %llu\n", |
| 2243 | __func__, (unsigned long long)instr->addr, |
| 2244 | (unsigned long long)instr->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2245 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2246 | if (check_offs_len(mtd, instr->addr, instr->len)) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2247 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2248 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2249 | instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2250 | |
| 2251 | /* Grab the lock and see if the device is available */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2252 | nand_get_device(chip, mtd, FL_ERASING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2253 | |
| 2254 | /* Shift to get first page */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2255 | page = (int)(instr->addr >> chip->page_shift); |
| 2256 | chipnr = (int)(instr->addr >> chip->chip_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2257 | |
| 2258 | /* Calculate pages in each block */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2259 | pages_per_block = 1 << (chip->phys_erase_shift - chip->page_shift); |
William Juul | b76ec38 | 2007-11-08 10:39:53 +0100 | [diff] [blame] | 2260 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2261 | /* Select the NAND device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2262 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2263 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2264 | /* Check, if it is write protected */ |
| 2265 | if (nand_check_wp(mtd)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2266 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Device is write protected!!!\n", |
| 2267 | __func__); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2268 | instr->state = MTD_ERASE_FAILED; |
| 2269 | goto erase_exit; |
| 2270 | } |
| 2271 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2272 | /* |
| 2273 | * If BBT requires refresh, set the BBT page mask to see if the BBT |
| 2274 | * should be rewritten. Otherwise the mask is set to 0xffffffff which |
| 2275 | * can not be matched. This is also done when the bbt is actually |
| 2276 | * erased to avoid recusrsive updates |
| 2277 | */ |
| 2278 | if (chip->options & BBT_AUTO_REFRESH && !allowbbt) |
| 2279 | bbt_masked_page = chip->bbt_td->pages[chipnr] & BBT_PAGE_MASK; |
| 2280 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2281 | /* Loop through the pages */ |
| 2282 | len = instr->len; |
| 2283 | |
| 2284 | instr->state = MTD_ERASING; |
| 2285 | |
| 2286 | while (len) { |
Scott Wood | ea95b64 | 2011-02-02 18:15:57 -0600 | [diff] [blame] | 2287 | WATCHDOG_RESET(); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2288 | /* |
| 2289 | * heck if we have a bad block, we do not erase bad blocks ! |
| 2290 | */ |
Marek Vasut | 971d9a1 | 2011-09-12 06:04:06 +0200 | [diff] [blame] | 2291 | if (!instr->scrub && nand_block_checkbad(mtd, ((loff_t) page) << |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2292 | chip->page_shift, 0, allowbbt)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2293 | printk(KERN_WARNING "%s: attempt to erase a bad block " |
| 2294 | "at page 0x%08x\n", __func__, page); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2295 | instr->state = MTD_ERASE_FAILED; |
| 2296 | goto erase_exit; |
| 2297 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2298 | |
| 2299 | /* |
| 2300 | * Invalidate the page cache, if we erase the block which |
| 2301 | * contains the current cached page |
| 2302 | */ |
| 2303 | if (page <= chip->pagebuf && chip->pagebuf < |
| 2304 | (page + pages_per_block)) |
| 2305 | chip->pagebuf = -1; |
| 2306 | |
| 2307 | chip->erase_cmd(mtd, page & chip->pagemask); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2308 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2309 | status = chip->waitfunc(mtd, chip); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2310 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2311 | /* |
| 2312 | * See if operation failed and additional status checks are |
| 2313 | * available |
| 2314 | */ |
| 2315 | if ((status & NAND_STATUS_FAIL) && (chip->errstat)) |
| 2316 | status = chip->errstat(mtd, chip, FL_ERASING, |
| 2317 | status, page); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2318 | |
| 2319 | /* See if block erase succeeded */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2320 | if (status & NAND_STATUS_FAIL) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2321 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: Failed erase, " |
| 2322 | "page 0x%08x\n", __func__, page); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2323 | instr->state = MTD_ERASE_FAILED; |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2324 | instr->fail_addr = |
| 2325 | ((loff_t)page << chip->page_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2326 | goto erase_exit; |
| 2327 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2328 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2329 | /* |
| 2330 | * If BBT requires refresh, set the BBT rewrite flag to the |
| 2331 | * page being erased |
| 2332 | */ |
| 2333 | if (bbt_masked_page != 0xffffffff && |
| 2334 | (page & BBT_PAGE_MASK) == bbt_masked_page) |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 2335 | rewrite_bbt[chipnr] = |
| 2336 | ((loff_t)page << chip->page_shift); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2337 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2338 | /* Increment page address and decrement length */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2339 | len -= (1 << chip->phys_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2340 | page += pages_per_block; |
| 2341 | |
| 2342 | /* Check, if we cross a chip boundary */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2343 | if (len && !(page & chip->pagemask)) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2344 | chipnr++; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2345 | chip->select_chip(mtd, -1); |
| 2346 | chip->select_chip(mtd, chipnr); |
| 2347 | |
| 2348 | /* |
| 2349 | * If BBT requires refresh and BBT-PERCHIP, set the BBT |
| 2350 | * page mask to see if this BBT should be rewritten |
| 2351 | */ |
| 2352 | if (bbt_masked_page != 0xffffffff && |
| 2353 | (chip->bbt_td->options & NAND_BBT_PERCHIP)) |
| 2354 | bbt_masked_page = chip->bbt_td->pages[chipnr] & |
| 2355 | BBT_PAGE_MASK; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2356 | } |
| 2357 | } |
| 2358 | instr->state = MTD_ERASE_DONE; |
| 2359 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2360 | erase_exit: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2361 | |
| 2362 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2363 | |
| 2364 | /* Deselect and wake up anyone waiting on the device */ |
| 2365 | nand_release_device(mtd); |
| 2366 | |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2367 | /* Do call back function */ |
| 2368 | if (!ret) |
| 2369 | mtd_erase_callback(instr); |
| 2370 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2371 | /* |
| 2372 | * If BBT requires refresh and erase was successful, rewrite any |
| 2373 | * selected bad block tables |
| 2374 | */ |
| 2375 | if (bbt_masked_page == 0xffffffff || ret) |
| 2376 | return ret; |
| 2377 | |
| 2378 | for (chipnr = 0; chipnr < chip->numchips; chipnr++) { |
| 2379 | if (!rewrite_bbt[chipnr]) |
| 2380 | continue; |
| 2381 | /* update the BBT for chip */ |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2382 | MTDDEBUG(MTD_DEBUG_LEVEL0, "%s: nand_update_bbt " |
| 2383 | "(%d:0x%0llx 0x%0x)\n", __func__, chipnr, |
| 2384 | rewrite_bbt[chipnr], chip->bbt_td->pages[chipnr]); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2385 | nand_update_bbt(mtd, rewrite_bbt[chipnr]); |
| 2386 | } |
| 2387 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2388 | /* Return more or less happy */ |
| 2389 | return ret; |
| 2390 | } |
| 2391 | |
| 2392 | /** |
| 2393 | * nand_sync - [MTD Interface] sync |
| 2394 | * @mtd: MTD device structure |
| 2395 | * |
| 2396 | * Sync is actually a wait for chip ready function |
| 2397 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2398 | static void nand_sync(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2399 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2400 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2401 | |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2402 | MTDDEBUG(MTD_DEBUG_LEVEL3, "%s: called\n", __func__); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2403 | |
| 2404 | /* Grab the lock and see if the device is available */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2405 | nand_get_device(chip, mtd, FL_SYNCING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2406 | /* Release it and go back */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2407 | nand_release_device(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2408 | } |
| 2409 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2410 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2411 | * nand_block_isbad - [MTD Interface] Check if block at offset is bad |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2412 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2413 | * @offs: offset relative to mtd start |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2414 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2415 | static int nand_block_isbad(struct mtd_info *mtd, loff_t offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2416 | { |
| 2417 | /* Check for invalid offset */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2418 | if (offs > mtd->size) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2419 | return -EINVAL; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2420 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2421 | return nand_block_checkbad(mtd, offs, 1, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2422 | } |
| 2423 | |
| 2424 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2425 | * nand_block_markbad - [MTD Interface] Mark block at the given offset as bad |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2426 | * @mtd: MTD device structure |
| 2427 | * @ofs: offset relative to mtd start |
| 2428 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2429 | static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2430 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2431 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2432 | int ret; |
| 2433 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2434 | ret = nand_block_isbad(mtd, ofs); |
| 2435 | if (ret) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2436 | /* If it was bad already, return success and do nothing. */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2437 | if (ret > 0) |
| 2438 | return 0; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2439 | return ret; |
| 2440 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2441 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2442 | return chip->block_markbad(mtd, ofs); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2443 | } |
| 2444 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2445 | /* |
| 2446 | * Set default functions |
| 2447 | */ |
| 2448 | static void nand_set_defaults(struct nand_chip *chip, int busw) |
| 2449 | { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2450 | /* check for proper chip_delay setup, set 20us if not */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2451 | if (!chip->chip_delay) |
| 2452 | chip->chip_delay = 20; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2453 | |
| 2454 | /* check, if a user supplied command function given */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2455 | if (chip->cmdfunc == NULL) |
| 2456 | chip->cmdfunc = nand_command; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2457 | |
| 2458 | /* check, if a user supplied wait function given */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2459 | if (chip->waitfunc == NULL) |
| 2460 | chip->waitfunc = nand_wait; |
| 2461 | |
| 2462 | if (!chip->select_chip) |
| 2463 | chip->select_chip = nand_select_chip; |
| 2464 | if (!chip->read_byte) |
| 2465 | chip->read_byte = busw ? nand_read_byte16 : nand_read_byte; |
| 2466 | if (!chip->read_word) |
| 2467 | chip->read_word = nand_read_word; |
| 2468 | if (!chip->block_bad) |
| 2469 | chip->block_bad = nand_block_bad; |
| 2470 | if (!chip->block_markbad) |
| 2471 | chip->block_markbad = nand_default_block_markbad; |
| 2472 | if (!chip->write_buf) |
| 2473 | chip->write_buf = busw ? nand_write_buf16 : nand_write_buf; |
| 2474 | if (!chip->read_buf) |
| 2475 | chip->read_buf = busw ? nand_read_buf16 : nand_read_buf; |
| 2476 | if (!chip->verify_buf) |
| 2477 | chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; |
| 2478 | if (!chip->scan_bbt) |
| 2479 | chip->scan_bbt = nand_default_bbt; |
Scott Wood | da0f439 | 2010-08-25 17:42:49 -0500 | [diff] [blame] | 2480 | if (!chip->controller) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2481 | chip->controller = &chip->hwcontrol; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2482 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2483 | |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2484 | #ifdef CONFIG_SYS_NAND_ONFI_DETECTION |
Christian Hitz | 6f1c9e0 | 2011-10-12 09:32:05 +0200 | [diff] [blame] | 2485 | /* |
| 2486 | * sanitize ONFI strings so we can safely print them |
| 2487 | */ |
| 2488 | static void sanitize_string(char *s, size_t len) |
| 2489 | { |
| 2490 | ssize_t i; |
| 2491 | |
| 2492 | /* null terminate */ |
| 2493 | s[len - 1] = 0; |
| 2494 | |
| 2495 | /* remove non printable chars */ |
| 2496 | for (i = 0; i < len - 1; i++) { |
| 2497 | if (s[i] < ' ' || s[i] > 127) |
| 2498 | s[i] = '?'; |
| 2499 | } |
| 2500 | |
| 2501 | /* remove trailing spaces */ |
| 2502 | strim(s); |
| 2503 | } |
| 2504 | |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2505 | static u16 onfi_crc16(u16 crc, u8 const *p, size_t len) |
| 2506 | { |
| 2507 | int i; |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2508 | while (len--) { |
| 2509 | crc ^= *p++ << 8; |
| 2510 | for (i = 0; i < 8; i++) |
| 2511 | crc = (crc << 1) ^ ((crc & 0x8000) ? 0x8005 : 0); |
| 2512 | } |
| 2513 | |
| 2514 | return crc; |
| 2515 | } |
| 2516 | |
| 2517 | /* |
| 2518 | * Check if the NAND chip is ONFI compliant, returns 1 if it is, 0 otherwise |
| 2519 | */ |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2520 | static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2521 | int *busw) |
| 2522 | { |
| 2523 | struct nand_onfi_params *p = &chip->onfi_params; |
| 2524 | int i; |
| 2525 | int val; |
| 2526 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2527 | /* try ONFI for unknow chip or LP */ |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2528 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x20, -1); |
| 2529 | if (chip->read_byte(mtd) != 'O' || chip->read_byte(mtd) != 'N' || |
| 2530 | chip->read_byte(mtd) != 'F' || chip->read_byte(mtd) != 'I') |
| 2531 | return 0; |
| 2532 | |
Stefan Roese | 0643e43 | 2012-05-07 21:29:30 +0000 | [diff] [blame] | 2533 | MTDDEBUG(MTD_DEBUG_LEVEL0, "ONFI flash detected\n"); |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2534 | chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1); |
| 2535 | for (i = 0; i < 3; i++) { |
| 2536 | chip->read_buf(mtd, (uint8_t *)p, sizeof(*p)); |
| 2537 | if (onfi_crc16(ONFI_CRC_BASE, (uint8_t *)p, 254) == |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2538 | le16_to_cpu(p->crc)) { |
Stefan Roese | 0643e43 | 2012-05-07 21:29:30 +0000 | [diff] [blame] | 2539 | MTDDEBUG(MTD_DEBUG_LEVEL0, |
| 2540 | "ONFI param page %d valid\n", i); |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2541 | break; |
| 2542 | } |
| 2543 | } |
| 2544 | |
| 2545 | if (i == 3) |
| 2546 | return 0; |
| 2547 | |
| 2548 | /* check version */ |
| 2549 | val = le16_to_cpu(p->revision); |
Florian Fainelli | 3eb4fc6 | 2011-04-03 18:23:56 +0200 | [diff] [blame] | 2550 | if (val & (1 << 5)) |
| 2551 | chip->onfi_version = 23; |
| 2552 | else if (val & (1 << 4)) |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2553 | chip->onfi_version = 22; |
| 2554 | else if (val & (1 << 3)) |
| 2555 | chip->onfi_version = 21; |
| 2556 | else if (val & (1 << 2)) |
| 2557 | chip->onfi_version = 20; |
Florian Fainelli | 3eb4fc6 | 2011-04-03 18:23:56 +0200 | [diff] [blame] | 2558 | else if (val & (1 << 1)) |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2559 | chip->onfi_version = 10; |
Florian Fainelli | 3eb4fc6 | 2011-04-03 18:23:56 +0200 | [diff] [blame] | 2560 | else |
| 2561 | chip->onfi_version = 0; |
| 2562 | |
| 2563 | if (!chip->onfi_version) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2564 | printk(KERN_INFO "%s: unsupported ONFI version: %d\n", |
| 2565 | __func__, val); |
Florian Fainelli | 3eb4fc6 | 2011-04-03 18:23:56 +0200 | [diff] [blame] | 2566 | return 0; |
| 2567 | } |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2568 | |
Christian Hitz | 6f1c9e0 | 2011-10-12 09:32:05 +0200 | [diff] [blame] | 2569 | sanitize_string(p->manufacturer, sizeof(p->manufacturer)); |
| 2570 | sanitize_string(p->model, sizeof(p->model)); |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2571 | if (!mtd->name) |
| 2572 | mtd->name = p->model; |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2573 | mtd->writesize = le32_to_cpu(p->byte_per_page); |
| 2574 | mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize; |
| 2575 | mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page); |
Florian Fainelli | 963eb89 | 2011-04-03 18:23:52 +0200 | [diff] [blame] | 2576 | chip->chipsize = (uint64_t)le32_to_cpu(p->blocks_per_lun) * mtd->erasesize; |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2577 | *busw = 0; |
| 2578 | if (le16_to_cpu(p->features) & 1) |
| 2579 | *busw = NAND_BUSWIDTH_16; |
| 2580 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2581 | chip->options &= ~NAND_CHIPOPTIONS_MSK; |
| 2582 | chip->options |= (NAND_NO_READRDY | |
| 2583 | NAND_NO_AUTOINCR) & NAND_CHIPOPTIONS_MSK; |
| 2584 | |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2585 | return 1; |
| 2586 | } |
| 2587 | #else |
| 2588 | static inline int nand_flash_detect_onfi(struct mtd_info *mtd, |
| 2589 | struct nand_chip *chip, |
| 2590 | int *busw) |
| 2591 | { |
| 2592 | return 0; |
| 2593 | } |
| 2594 | #endif |
| 2595 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2596 | /* |
| 2597 | * Get the flash and manufacturer id and lookup if the type is supported |
| 2598 | */ |
Mike Frysinger | 6c285f6 | 2010-10-20 01:15:21 +0000 | [diff] [blame] | 2599 | static const struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2600 | struct nand_chip *chip, |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2601 | int busw, |
| 2602 | int *maf_id, int *dev_id, |
Lei Wen | 75bde94 | 2011-01-06 09:48:18 +0800 | [diff] [blame] | 2603 | const struct nand_flash_dev *type) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2604 | { |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2605 | int i, maf_idx; |
| 2606 | u8 id_data[8]; |
| 2607 | int ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2608 | |
| 2609 | /* Select the device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2610 | chip->select_chip(mtd, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2611 | |
Karl Beldan | b6322fc | 2008-09-15 16:08:03 +0200 | [diff] [blame] | 2612 | /* |
| 2613 | * Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx) |
| 2614 | * after power-up |
| 2615 | */ |
| 2616 | chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); |
| 2617 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2618 | /* Send the command for reading device ID */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2619 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2620 | |
| 2621 | /* Read manufacturer and device IDs */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2622 | *maf_id = chip->read_byte(mtd); |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2623 | *dev_id = chip->read_byte(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2624 | |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2625 | /* Try again to make sure, as some systems the bus-hold or other |
| 2626 | * interface concerns can cause random data which looks like a |
| 2627 | * possibly credible NAND flash to appear. If the two results do |
| 2628 | * not match, ignore the device completely. |
| 2629 | */ |
| 2630 | |
| 2631 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
| 2632 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2633 | for (i = 0; i < 2; i++) |
| 2634 | id_data[i] = chip->read_byte(mtd); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2635 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2636 | if (id_data[0] != *maf_id || id_data[1] != *dev_id) { |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2637 | printk(KERN_INFO "%s: second ID read did not match " |
| 2638 | "%02x,%02x against %02x,%02x\n", __func__, |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2639 | *maf_id, *dev_id, id_data[0], id_data[1]); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2640 | return ERR_PTR(-ENODEV); |
| 2641 | } |
| 2642 | |
Lei Wen | 75bde94 | 2011-01-06 09:48:18 +0800 | [diff] [blame] | 2643 | if (!type) |
| 2644 | type = nand_flash_ids; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2645 | |
Lei Wen | 75bde94 | 2011-01-06 09:48:18 +0800 | [diff] [blame] | 2646 | for (; type->name != NULL; type++) |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2647 | if (*dev_id == type->id) |
Wolfgang Denk | a4de835 | 2011-02-02 22:36:10 +0100 | [diff] [blame] | 2648 | break; |
Lei Wen | 75bde94 | 2011-01-06 09:48:18 +0800 | [diff] [blame] | 2649 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2650 | chip->onfi_version = 0; |
| 2651 | if (!type->name || !type->pagesize) { |
| 2652 | /* Check is chip is ONFI compliant */ |
| 2653 | ret = nand_flash_detect_onfi(mtd, chip, &busw); |
| 2654 | if (ret) |
| 2655 | goto ident_done; |
Florian Fainelli | d619189 | 2010-06-12 20:59:25 +0200 | [diff] [blame] | 2656 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2657 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2658 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
| 2659 | |
| 2660 | /* Read entire ID string */ |
| 2661 | |
| 2662 | for (i = 0; i < 8; i++) |
| 2663 | id_data[i] = chip->read_byte(mtd); |
| 2664 | |
| 2665 | if (!type->name) |
| 2666 | return ERR_PTR(-ENODEV); |
| 2667 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2668 | if (!mtd->name) |
| 2669 | mtd->name = type->name; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2670 | |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 2671 | chip->chipsize = (uint64_t)type->chipsize << 20; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2672 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2673 | if (!type->pagesize && chip->init_size) { |
| 2674 | /* set the pagesize, oobsize, erasesize by the driver*/ |
| 2675 | busw = chip->init_size(mtd, chip, id_data); |
| 2676 | } else if (!type->pagesize) { |
| 2677 | int extid; |
| 2678 | /* The 3rd id byte holds MLC / multichip data */ |
| 2679 | chip->cellinfo = id_data[2]; |
| 2680 | /* The 4th id byte is the important one */ |
| 2681 | extid = id_data[3]; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2682 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2683 | /* |
| 2684 | * Field definitions are in the following datasheets: |
| 2685 | * Old style (4,5 byte ID): Samsung K9GAG08U0M (p.32) |
| 2686 | * New style (6 byte ID): Samsung K9GBG08U0M (p.40) |
| 2687 | * |
| 2688 | * Check for wraparound + Samsung ID + nonzero 6th byte |
| 2689 | * to decide what to do. |
| 2690 | */ |
| 2691 | if (id_data[0] == id_data[6] && id_data[1] == id_data[7] && |
| 2692 | id_data[0] == NAND_MFR_SAMSUNG && |
| 2693 | (chip->cellinfo & NAND_CI_CELLTYPE_MSK) && |
| 2694 | id_data[5] != 0x00) { |
| 2695 | /* Calc pagesize */ |
| 2696 | mtd->writesize = 2048 << (extid & 0x03); |
| 2697 | extid >>= 2; |
| 2698 | /* Calc oobsize */ |
| 2699 | switch (extid & 0x03) { |
| 2700 | case 1: |
| 2701 | mtd->oobsize = 128; |
| 2702 | break; |
| 2703 | case 2: |
| 2704 | mtd->oobsize = 218; |
| 2705 | break; |
| 2706 | case 3: |
| 2707 | mtd->oobsize = 400; |
| 2708 | break; |
| 2709 | default: |
| 2710 | mtd->oobsize = 436; |
| 2711 | break; |
| 2712 | } |
| 2713 | extid >>= 2; |
| 2714 | /* Calc blocksize */ |
| 2715 | mtd->erasesize = (128 * 1024) << |
| 2716 | (((extid >> 1) & 0x04) | (extid & 0x03)); |
| 2717 | busw = 0; |
| 2718 | } else { |
| 2719 | /* Calc pagesize */ |
| 2720 | mtd->writesize = 1024 << (extid & 0x03); |
| 2721 | extid >>= 2; |
| 2722 | /* Calc oobsize */ |
| 2723 | mtd->oobsize = (8 << (extid & 0x01)) * |
| 2724 | (mtd->writesize >> 9); |
| 2725 | extid >>= 2; |
| 2726 | /* Calc blocksize. Blocksize is multiples of 64KiB */ |
| 2727 | mtd->erasesize = (64 * 1024) << (extid & 0x03); |
| 2728 | extid >>= 2; |
| 2729 | /* Get buswidth information */ |
| 2730 | busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; |
| 2731 | } |
| 2732 | } else { |
| 2733 | /* |
| 2734 | * Old devices have chip data hardcoded in the device id table |
| 2735 | */ |
| 2736 | mtd->erasesize = type->erasesize; |
| 2737 | mtd->writesize = type->pagesize; |
| 2738 | mtd->oobsize = mtd->writesize / 32; |
| 2739 | busw = type->options & NAND_BUSWIDTH_16; |
| 2740 | |
| 2741 | /* |
| 2742 | * Check for Spansion/AMD ID + repeating 5th, 6th byte since |
| 2743 | * some Spansion chips have erasesize that conflicts with size |
| 2744 | * listed in nand_ids table |
| 2745 | * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39) |
| 2746 | */ |
| 2747 | if (*maf_id == NAND_MFR_AMD && id_data[4] != 0x00 && |
| 2748 | id_data[5] == 0x00 && id_data[6] == 0x00 && |
| 2749 | id_data[7] == 0x00 && mtd->writesize == 512) { |
| 2750 | mtd->erasesize = 128 * 1024; |
| 2751 | mtd->erasesize <<= ((id_data[3] & 0x03) << 1); |
| 2752 | } |
| 2753 | } |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2754 | /* Get chip options, preserve non chip based options */ |
| 2755 | chip->options &= ~NAND_CHIPOPTIONS_MSK; |
| 2756 | chip->options |= type->options & NAND_CHIPOPTIONS_MSK; |
| 2757 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2758 | /* Check if chip is a not a samsung device. Do not clear the |
| 2759 | * options for chips which are not having an extended id. |
| 2760 | */ |
| 2761 | if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize) |
| 2762 | chip->options &= ~NAND_SAMSUNG_LP_OPTIONS; |
| 2763 | ident_done: |
| 2764 | |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2765 | /* |
| 2766 | * Set chip as a default. Board drivers can override it, if necessary |
| 2767 | */ |
| 2768 | chip->options |= NAND_NO_AUTOINCR; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2769 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2770 | /* Try to identify manufacturer */ |
| 2771 | for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_idx++) { |
| 2772 | if (nand_manuf_ids[maf_idx].id == *maf_id) |
| 2773 | break; |
| 2774 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2775 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2776 | /* |
| 2777 | * Check, if buswidth is correct. Hardware drivers should set |
| 2778 | * chip correct ! |
| 2779 | */ |
| 2780 | if (busw != (chip->options & NAND_BUSWIDTH_16)) { |
| 2781 | printk(KERN_INFO "NAND device: Manufacturer ID:" |
| 2782 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2783 | *dev_id, nand_manuf_ids[maf_idx].name, mtd->name); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2784 | printk(KERN_WARNING "NAND bus width %d instead %d bit\n", |
| 2785 | (chip->options & NAND_BUSWIDTH_16) ? 16 : 8, |
| 2786 | busw ? 16 : 8); |
| 2787 | return ERR_PTR(-EINVAL); |
| 2788 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2789 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2790 | /* Calculate the address shift from the page size */ |
| 2791 | chip->page_shift = ffs(mtd->writesize) - 1; |
| 2792 | /* Convert chipsize to number of pages per chip -1. */ |
| 2793 | chip->pagemask = (chip->chipsize >> chip->page_shift) - 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2794 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2795 | chip->bbt_erase_shift = chip->phys_erase_shift = |
| 2796 | ffs(mtd->erasesize) - 1; |
Sandeep Paulraj | eab580c | 2009-10-30 13:51:23 -0400 | [diff] [blame] | 2797 | if (chip->chipsize & 0xffffffff) |
Sandeep Paulraj | 1bc877c | 2009-11-07 14:24:06 -0500 | [diff] [blame] | 2798 | chip->chip_shift = ffs((unsigned)chip->chipsize) - 1; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2799 | else { |
| 2800 | chip->chip_shift = ffs((unsigned)(chip->chipsize >> 32)); |
| 2801 | chip->chip_shift += 32 - 1; |
| 2802 | } |
| 2803 | |
| 2804 | chip->badblockbits = 8; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2805 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2806 | /* Set the bad block position */ |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2807 | if (mtd->writesize > 512 || (busw & NAND_BUSWIDTH_16)) |
| 2808 | chip->badblockpos = NAND_LARGE_BADBLOCK_POS; |
| 2809 | else |
| 2810 | chip->badblockpos = NAND_SMALL_BADBLOCK_POS; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2811 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2812 | /* |
| 2813 | * Bad block marker is stored in the last page of each block |
| 2814 | * on Samsung and Hynix MLC devices; stored in first two pages |
| 2815 | * of each block on Micron devices with 2KiB pages and on |
| 2816 | * SLC Samsung, Hynix, Toshiba and AMD/Spansion. All others scan |
| 2817 | * only the first page. |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2818 | */ |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2819 | if ((chip->cellinfo & NAND_CI_CELLTYPE_MSK) && |
| 2820 | (*maf_id == NAND_MFR_SAMSUNG || |
| 2821 | *maf_id == NAND_MFR_HYNIX)) |
| 2822 | chip->options |= NAND_BBT_SCANLASTPAGE; |
| 2823 | else if ((!(chip->cellinfo & NAND_CI_CELLTYPE_MSK) && |
| 2824 | (*maf_id == NAND_MFR_SAMSUNG || |
| 2825 | *maf_id == NAND_MFR_HYNIX || |
| 2826 | *maf_id == NAND_MFR_TOSHIBA || |
| 2827 | *maf_id == NAND_MFR_AMD)) || |
| 2828 | (mtd->writesize == 2048 && |
| 2829 | *maf_id == NAND_MFR_MICRON)) |
| 2830 | chip->options |= NAND_BBT_SCAN2NDPAGE; |
| 2831 | |
| 2832 | /* |
| 2833 | * Numonyx/ST 2K pages, x8 bus use BOTH byte 1 and 6 |
| 2834 | */ |
| 2835 | if (!(busw & NAND_BUSWIDTH_16) && |
| 2836 | *maf_id == NAND_MFR_STMICRO && |
| 2837 | mtd->writesize == 2048) { |
| 2838 | chip->options |= NAND_BBT_SCANBYTE1AND6; |
| 2839 | chip->badblockpos = 0; |
| 2840 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2841 | |
| 2842 | /* Check for AND chips with 4 page planes */ |
| 2843 | if (chip->options & NAND_4PAGE_ARRAY) |
| 2844 | chip->erase_cmd = multi_erase_cmd; |
| 2845 | else |
| 2846 | chip->erase_cmd = single_erase_cmd; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2847 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2848 | /* Do not replace user supplied command function ! */ |
| 2849 | if (mtd->writesize > 512 && chip->cmdfunc == nand_command) |
| 2850 | chip->cmdfunc = nand_command_lp; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2851 | |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2852 | /* TODO onfi flash name */ |
Stefan Roese | 4fe7143 | 2008-01-10 18:47:33 +0100 | [diff] [blame] | 2853 | MTDDEBUG (MTD_DEBUG_LEVEL0, "NAND device: Manufacturer ID:" |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 2854 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, *dev_id, |
| 2855 | nand_manuf_ids[maf_idx].name, |
| 2856 | #ifdef CONFIG_SYS_NAND_ONFI_DETECTION |
| 2857 | chip->onfi_version ? chip->onfi_params.model : type->name); |
| 2858 | #else |
| 2859 | type->name); |
| 2860 | #endif |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2861 | |
| 2862 | return type; |
| 2863 | } |
| 2864 | |
| 2865 | /** |
| 2866 | * nand_scan_ident - [NAND Interface] Scan for the NAND device |
| 2867 | * @mtd: MTD device structure |
| 2868 | * @maxchips: Number of chips to scan for |
Lei Wen | 75bde94 | 2011-01-06 09:48:18 +0800 | [diff] [blame] | 2869 | * @table: Alternative NAND ID table |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2870 | * |
| 2871 | * This is the first phase of the normal nand_scan() function. It |
| 2872 | * reads the flash ID and sets up MTD fields accordingly. |
| 2873 | * |
| 2874 | * The mtd->owner field must be set to the module of the caller. |
| 2875 | */ |
Lei Wen | 75bde94 | 2011-01-06 09:48:18 +0800 | [diff] [blame] | 2876 | int nand_scan_ident(struct mtd_info *mtd, int maxchips, |
| 2877 | const struct nand_flash_dev *table) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2878 | { |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2879 | int i, busw, nand_maf_id, nand_dev_id; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2880 | struct nand_chip *chip = mtd->priv; |
Mike Frysinger | 6c285f6 | 2010-10-20 01:15:21 +0000 | [diff] [blame] | 2881 | const struct nand_flash_dev *type; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2882 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2883 | /* Get buswidth to select the correct functions */ |
| 2884 | busw = chip->options & NAND_BUSWIDTH_16; |
| 2885 | /* Set the default functions */ |
| 2886 | nand_set_defaults(chip, busw); |
| 2887 | |
| 2888 | /* Read the flash type */ |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2889 | type = nand_get_flash_type(mtd, chip, busw, |
| 2890 | &nand_maf_id, &nand_dev_id, table); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2891 | |
| 2892 | if (IS_ERR(type)) { |
Peter Tyser | f96047a | 2009-02-04 13:39:40 -0600 | [diff] [blame] | 2893 | #ifndef CONFIG_SYS_NAND_QUIET_TEST |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2894 | printk(KERN_WARNING "No NAND device found!!!\n"); |
Peter Tyser | f96047a | 2009-02-04 13:39:40 -0600 | [diff] [blame] | 2895 | #endif |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2896 | chip->select_chip(mtd, -1); |
| 2897 | return PTR_ERR(type); |
| 2898 | } |
| 2899 | |
| 2900 | /* Check for a chip array */ |
| 2901 | for (i = 1; i < maxchips; i++) { |
| 2902 | chip->select_chip(mtd, i); |
Karl Beldan | b6322fc | 2008-09-15 16:08:03 +0200 | [diff] [blame] | 2903 | /* See comment in nand_get_flash_type for reset */ |
| 2904 | chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2905 | /* Send the command for reading device ID */ |
| 2906 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2907 | /* Read manufacturer and device IDs */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2908 | if (nand_maf_id != chip->read_byte(mtd) || |
Florian Fainelli | c98a935 | 2011-02-25 00:01:34 +0000 | [diff] [blame] | 2909 | nand_dev_id != chip->read_byte(mtd)) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2910 | break; |
| 2911 | } |
Wolfgang Grandegger | b325d7e | 2009-02-11 18:38:20 +0100 | [diff] [blame] | 2912 | #ifdef DEBUG |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2913 | if (i > 1) |
| 2914 | printk(KERN_INFO "%d NAND chips detected\n", i); |
Wolfgang Grandegger | b325d7e | 2009-02-11 18:38:20 +0100 | [diff] [blame] | 2915 | #endif |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2916 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2917 | /* Store the number of chips and calc total size for mtd */ |
| 2918 | chip->numchips = i; |
| 2919 | mtd->size = i * chip->chipsize; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2920 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2921 | return 0; |
| 2922 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2923 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2924 | |
| 2925 | /** |
| 2926 | * nand_scan_tail - [NAND Interface] Scan for the NAND device |
| 2927 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2928 | * |
| 2929 | * This is the second phase of the normal nand_scan() function. It |
| 2930 | * fills out all the uninitialized function pointers with the defaults |
| 2931 | * and scans for a bad block table if appropriate. |
| 2932 | */ |
| 2933 | int nand_scan_tail(struct mtd_info *mtd) |
| 2934 | { |
| 2935 | int i; |
| 2936 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2937 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2938 | if (!(chip->options & NAND_OWN_BUFFERS)) |
Simon Glass | 7885179 | 2012-07-29 20:53:25 +0000 | [diff] [blame^] | 2939 | chip->buffers = memalign(ARCH_DMA_MINALIGN, |
| 2940 | sizeof(*chip->buffers)); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2941 | if (!chip->buffers) |
| 2942 | return -ENOMEM; |
| 2943 | |
| 2944 | /* Set the internal oob buffer location, just after the page data */ |
| 2945 | chip->oob_poi = chip->buffers->databuf + mtd->writesize; |
| 2946 | |
| 2947 | /* |
| 2948 | * If no default placement scheme is given, select an appropriate one |
| 2949 | */ |
Christian Hitz | 55f7bca | 2011-10-12 09:31:59 +0200 | [diff] [blame] | 2950 | if (!chip->ecc.layout && (chip->ecc.mode != NAND_ECC_SOFT_BCH)) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2951 | switch (mtd->oobsize) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2952 | case 8: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2953 | chip->ecc.layout = &nand_oob_8; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2954 | break; |
| 2955 | case 16: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2956 | chip->ecc.layout = &nand_oob_16; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2957 | break; |
| 2958 | case 64: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2959 | chip->ecc.layout = &nand_oob_64; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2960 | break; |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 2961 | case 128: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2962 | chip->ecc.layout = &nand_oob_128; |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 2963 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2964 | default: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2965 | printk(KERN_WARNING "No oob scheme defined for " |
| 2966 | "oobsize %d\n", mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2967 | } |
| 2968 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2969 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2970 | if (!chip->write_page) |
| 2971 | chip->write_page = nand_write_page; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2972 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2973 | /* |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2974 | * check ECC mode, default to software if 3byte/512byte hardware ECC is |
| 2975 | * selected and we have 256 byte pagesize fallback to software ECC |
| 2976 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2977 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2978 | switch (chip->ecc.mode) { |
Sandeep Paulraj | dea4070 | 2009-08-10 13:27:56 -0400 | [diff] [blame] | 2979 | case NAND_ECC_HW_OOB_FIRST: |
| 2980 | /* Similar to NAND_ECC_HW, but a separate read_page handle */ |
| 2981 | if (!chip->ecc.calculate || !chip->ecc.correct || |
| 2982 | !chip->ecc.hwctl) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 2983 | printk(KERN_WARNING "No ECC functions supplied; " |
Sandeep Paulraj | dea4070 | 2009-08-10 13:27:56 -0400 | [diff] [blame] | 2984 | "Hardware ECC not possible\n"); |
| 2985 | BUG(); |
| 2986 | } |
| 2987 | if (!chip->ecc.read_page) |
| 2988 | chip->ecc.read_page = nand_read_page_hwecc_oob_first; |
| 2989 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2990 | case NAND_ECC_HW: |
| 2991 | /* Use standard hwecc read page function ? */ |
| 2992 | if (!chip->ecc.read_page) |
| 2993 | chip->ecc.read_page = nand_read_page_hwecc; |
| 2994 | if (!chip->ecc.write_page) |
| 2995 | chip->ecc.write_page = nand_write_page_hwecc; |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 2996 | if (!chip->ecc.read_page_raw) |
| 2997 | chip->ecc.read_page_raw = nand_read_page_raw; |
| 2998 | if (!chip->ecc.write_page_raw) |
| 2999 | chip->ecc.write_page_raw = nand_write_page_raw; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3000 | if (!chip->ecc.read_oob) |
| 3001 | chip->ecc.read_oob = nand_read_oob_std; |
| 3002 | if (!chip->ecc.write_oob) |
| 3003 | chip->ecc.write_oob = nand_write_oob_std; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3004 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3005 | case NAND_ECC_HW_SYNDROME: |
Scott Wood | 5fd2c30 | 2008-03-18 15:29:14 -0500 | [diff] [blame] | 3006 | if ((!chip->ecc.calculate || !chip->ecc.correct || |
| 3007 | !chip->ecc.hwctl) && |
| 3008 | (!chip->ecc.read_page || |
| 3009 | chip->ecc.read_page == nand_read_page_hwecc || |
| 3010 | !chip->ecc.write_page || |
| 3011 | chip->ecc.write_page == nand_write_page_hwecc)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 3012 | printk(KERN_WARNING "No ECC functions supplied; " |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3013 | "Hardware ECC not possible\n"); |
| 3014 | BUG(); |
| 3015 | } |
| 3016 | /* Use standard syndrome read/write page function ? */ |
| 3017 | if (!chip->ecc.read_page) |
| 3018 | chip->ecc.read_page = nand_read_page_syndrome; |
| 3019 | if (!chip->ecc.write_page) |
| 3020 | chip->ecc.write_page = nand_write_page_syndrome; |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 3021 | if (!chip->ecc.read_page_raw) |
| 3022 | chip->ecc.read_page_raw = nand_read_page_raw_syndrome; |
| 3023 | if (!chip->ecc.write_page_raw) |
| 3024 | chip->ecc.write_page_raw = nand_write_page_raw_syndrome; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3025 | if (!chip->ecc.read_oob) |
| 3026 | chip->ecc.read_oob = nand_read_oob_syndrome; |
| 3027 | if (!chip->ecc.write_oob) |
| 3028 | chip->ecc.write_oob = nand_write_oob_syndrome; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 3029 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3030 | if (mtd->writesize >= chip->ecc.size) |
| 3031 | break; |
| 3032 | printk(KERN_WARNING "%d byte HW ECC not possible on " |
| 3033 | "%d byte page size, fallback to SW ECC\n", |
| 3034 | chip->ecc.size, mtd->writesize); |
| 3035 | chip->ecc.mode = NAND_ECC_SOFT; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 3036 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3037 | case NAND_ECC_SOFT: |
| 3038 | chip->ecc.calculate = nand_calculate_ecc; |
| 3039 | chip->ecc.correct = nand_correct_data; |
| 3040 | chip->ecc.read_page = nand_read_page_swecc; |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 3041 | chip->ecc.read_subpage = nand_read_subpage; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3042 | chip->ecc.write_page = nand_write_page_swecc; |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 3043 | chip->ecc.read_page_raw = nand_read_page_raw; |
| 3044 | chip->ecc.write_page_raw = nand_write_page_raw; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3045 | chip->ecc.read_oob = nand_read_oob_std; |
| 3046 | chip->ecc.write_oob = nand_write_oob_std; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 3047 | if (!chip->ecc.size) |
| 3048 | chip->ecc.size = 256; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3049 | chip->ecc.bytes = 3; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3050 | break; |
| 3051 | |
Christian Hitz | 55f7bca | 2011-10-12 09:31:59 +0200 | [diff] [blame] | 3052 | case NAND_ECC_SOFT_BCH: |
| 3053 | if (!mtd_nand_has_bch()) { |
| 3054 | printk(KERN_WARNING "CONFIG_MTD_ECC_BCH not enabled\n"); |
| 3055 | return -EINVAL; |
| 3056 | } |
| 3057 | chip->ecc.calculate = nand_bch_calculate_ecc; |
| 3058 | chip->ecc.correct = nand_bch_correct_data; |
| 3059 | chip->ecc.read_page = nand_read_page_swecc; |
| 3060 | chip->ecc.read_subpage = nand_read_subpage; |
| 3061 | chip->ecc.write_page = nand_write_page_swecc; |
| 3062 | chip->ecc.read_page_raw = nand_read_page_raw; |
| 3063 | chip->ecc.write_page_raw = nand_write_page_raw; |
| 3064 | chip->ecc.read_oob = nand_read_oob_std; |
| 3065 | chip->ecc.write_oob = nand_write_oob_std; |
| 3066 | /* |
| 3067 | * Board driver should supply ecc.size and ecc.bytes values to |
| 3068 | * select how many bits are correctable; see nand_bch_init() |
| 3069 | * for details. |
| 3070 | * Otherwise, default to 4 bits for large page devices |
| 3071 | */ |
| 3072 | if (!chip->ecc.size && (mtd->oobsize >= 64)) { |
| 3073 | chip->ecc.size = 512; |
| 3074 | chip->ecc.bytes = 7; |
| 3075 | } |
| 3076 | chip->ecc.priv = nand_bch_init(mtd, |
| 3077 | chip->ecc.size, |
| 3078 | chip->ecc.bytes, |
| 3079 | &chip->ecc.layout); |
| 3080 | if (!chip->ecc.priv) |
| 3081 | printk(KERN_WARNING "BCH ECC initialization failed!\n"); |
| 3082 | |
| 3083 | break; |
| 3084 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3085 | case NAND_ECC_NONE: |
| 3086 | printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " |
| 3087 | "This is not recommended !!\n"); |
| 3088 | chip->ecc.read_page = nand_read_page_raw; |
| 3089 | chip->ecc.write_page = nand_write_page_raw; |
| 3090 | chip->ecc.read_oob = nand_read_oob_std; |
David Brownell | ee86b8d | 2009-11-07 16:27:01 -0500 | [diff] [blame] | 3091 | chip->ecc.read_page_raw = nand_read_page_raw; |
| 3092 | chip->ecc.write_page_raw = nand_write_page_raw; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3093 | chip->ecc.write_oob = nand_write_oob_std; |
| 3094 | chip->ecc.size = mtd->writesize; |
| 3095 | chip->ecc.bytes = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3096 | break; |
| 3097 | |
| 3098 | default: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3099 | printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", |
| 3100 | chip->ecc.mode); |
| 3101 | BUG(); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3102 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 3103 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3104 | /* |
| 3105 | * The number of bytes available for a client to place data into |
| 3106 | * the out of band area |
| 3107 | */ |
| 3108 | chip->ecc.layout->oobavail = 0; |
Sandeep Paulraj | eec6cb3 | 2009-11-07 14:25:18 -0500 | [diff] [blame] | 3109 | for (i = 0; chip->ecc.layout->oobfree[i].length |
| 3110 | && i < ARRAY_SIZE(chip->ecc.layout->oobfree); i++) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3111 | chip->ecc.layout->oobavail += |
| 3112 | chip->ecc.layout->oobfree[i].length; |
| 3113 | mtd->oobavail = chip->ecc.layout->oobavail; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 3114 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3115 | /* |
| 3116 | * Set the number of read / write steps for one page depending on ECC |
| 3117 | * mode |
| 3118 | */ |
| 3119 | chip->ecc.steps = mtd->writesize / chip->ecc.size; |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 3120 | if (chip->ecc.steps * chip->ecc.size != mtd->writesize) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3121 | printk(KERN_WARNING "Invalid ecc parameters\n"); |
| 3122 | BUG(); |
| 3123 | } |
| 3124 | chip->ecc.total = chip->ecc.steps * chip->ecc.bytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 3125 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3126 | /* |
| 3127 | * Allow subpage writes up to ecc.steps. Not possible for MLC |
| 3128 | * FLASH. |
| 3129 | */ |
| 3130 | if (!(chip->options & NAND_NO_SUBPAGE_WRITE) && |
| 3131 | !(chip->cellinfo & NAND_CI_CELLTYPE_MSK)) { |
Christian Hitz | 13fc0e2 | 2011-10-12 09:32:01 +0200 | [diff] [blame] | 3132 | switch (chip->ecc.steps) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3133 | case 2: |
| 3134 | mtd->subpage_sft = 1; |
| 3135 | break; |
| 3136 | case 4: |
| 3137 | case 8: |
Sandeep Paulraj | fd9874d | 2009-11-07 14:24:34 -0500 | [diff] [blame] | 3138 | case 16: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3139 | mtd->subpage_sft = 2; |
| 3140 | break; |
| 3141 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3142 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3143 | chip->subpagesize = mtd->writesize >> mtd->subpage_sft; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3144 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3145 | /* Initialize state */ |
| 3146 | chip->state = FL_READY; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3147 | |
| 3148 | /* De-select the device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3149 | chip->select_chip(mtd, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3150 | |
| 3151 | /* Invalidate the pagebuffer reference */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3152 | chip->pagebuf = -1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3153 | |
| 3154 | /* Fill in remaining MTD driver data */ |
| 3155 | mtd->type = MTD_NANDFLASH; |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 3156 | mtd->flags = (chip->options & NAND_ROM) ? MTD_CAP_ROM : |
| 3157 | MTD_CAP_NANDFLASH; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3158 | mtd->erase = nand_erase; |
| 3159 | mtd->point = NULL; |
| 3160 | mtd->unpoint = NULL; |
| 3161 | mtd->read = nand_read; |
| 3162 | mtd->write = nand_write; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3163 | mtd->read_oob = nand_read_oob; |
| 3164 | mtd->write_oob = nand_write_oob; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3165 | mtd->sync = nand_sync; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3166 | mtd->lock = NULL; |
| 3167 | mtd->unlock = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3168 | mtd->block_isbad = nand_block_isbad; |
| 3169 | mtd->block_markbad = nand_block_markbad; |
| 3170 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3171 | /* propagate ecc.layout to mtd_info */ |
| 3172 | mtd->ecclayout = chip->ecc.layout; |
| 3173 | |
| 3174 | /* Check, if we should skip the bad block table scan */ |
| 3175 | if (chip->options & NAND_SKIP_BBTSCAN) |
Scott Wood | f2f5c9e | 2012-02-20 14:50:39 -0600 | [diff] [blame] | 3176 | chip->options |= NAND_BBT_SCANNED; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3177 | |
Scott Wood | f2f5c9e | 2012-02-20 14:50:39 -0600 | [diff] [blame] | 3178 | return 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3179 | } |
| 3180 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3181 | /** |
| 3182 | * nand_scan - [NAND Interface] Scan for the NAND device |
| 3183 | * @mtd: MTD device structure |
| 3184 | * @maxchips: Number of chips to scan for |
| 3185 | * |
| 3186 | * This fills out all the uninitialized function pointers |
| 3187 | * with the defaults. |
| 3188 | * The flash ID is read and the mtd/chip structures are |
| 3189 | * filled with the appropriate values. |
| 3190 | * The mtd->owner field must be set to the module of the caller |
| 3191 | * |
| 3192 | */ |
| 3193 | int nand_scan(struct mtd_info *mtd, int maxchips) |
| 3194 | { |
| 3195 | int ret; |
| 3196 | |
Lei Wen | 75bde94 | 2011-01-06 09:48:18 +0800 | [diff] [blame] | 3197 | ret = nand_scan_ident(mtd, maxchips, NULL); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3198 | if (!ret) |
| 3199 | ret = nand_scan_tail(mtd); |
| 3200 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3201 | } |
| 3202 | |
| 3203 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 3204 | * nand_release - [NAND Interface] Free resources held by the NAND device |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3205 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3206 | */ |
| 3207 | void nand_release(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3208 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3209 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3210 | |
Christian Hitz | 55f7bca | 2011-10-12 09:31:59 +0200 | [diff] [blame] | 3211 | if (chip->ecc.mode == NAND_ECC_SOFT_BCH) |
| 3212 | nand_bch_free((struct nand_bch_control *)chip->ecc.priv); |
| 3213 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3214 | #ifdef CONFIG_MTD_PARTITIONS |
| 3215 | /* Deregister partitions */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3216 | del_mtd_partitions(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 3217 | #endif |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3218 | |
| 3219 | /* Free bad block table memory */ |
| 3220 | kfree(chip->bbt); |
| 3221 | if (!(chip->options & NAND_OWN_BUFFERS)) |
| 3222 | kfree(chip->buffers); |
Christian Hitz | b8a6b37 | 2011-10-12 09:32:02 +0200 | [diff] [blame] | 3223 | |
| 3224 | /* Free bad block descriptor memory */ |
| 3225 | if (chip->badblock_pattern && chip->badblock_pattern->options |
| 3226 | & NAND_BBT_DYNAMICSTRUCT) |
| 3227 | kfree(chip->badblock_pattern); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 3228 | } |