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 | |
| 35 | /* XXX U-BOOT XXX */ |
| 36 | #if 0 |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 37 | #include <linux/module.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 38 | #include <linux/delay.h> |
| 39 | #include <linux/errno.h> |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 40 | #include <linux/err.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 41 | #include <linux/sched.h> |
| 42 | #include <linux/slab.h> |
| 43 | #include <linux/types.h> |
| 44 | #include <linux/mtd/mtd.h> |
| 45 | #include <linux/mtd/nand.h> |
| 46 | #include <linux/mtd/nand_ecc.h> |
| 47 | #include <linux/mtd/compatmac.h> |
| 48 | #include <linux/interrupt.h> |
| 49 | #include <linux/bitops.h> |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 50 | #include <linux/leds.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 51 | #include <asm/io.h> |
| 52 | |
| 53 | #ifdef CONFIG_MTD_PARTITIONS |
| 54 | #include <linux/mtd/partitions.h> |
| 55 | #endif |
| 56 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 57 | #endif |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 58 | |
| 59 | #include <common.h> |
Bartlomiej Sieka | 582f1a3 | 2006-03-05 18:57:33 +0100 | [diff] [blame] | 60 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 61 | #define ENOTSUPP 524 /* Operation is not supported */ |
| 62 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 63 | #include <malloc.h> |
| 64 | #include <watchdog.h> |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 65 | #include <linux/err.h> |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 66 | #include <linux/mtd/compat.h> |
| 67 | #include <linux/mtd/mtd.h> |
| 68 | #include <linux/mtd/nand.h> |
| 69 | #include <linux/mtd/nand_ecc.h> |
| 70 | |
Stefan Roese | fa252ea | 2009-04-24 15:58:33 +0200 | [diff] [blame] | 71 | #ifdef CONFIG_MTD_PARTITIONS |
| 72 | #include <linux/mtd/partitions.h> |
| 73 | #endif |
| 74 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 75 | #include <asm/io.h> |
| 76 | #include <asm/errno.h> |
| 77 | |
| 78 | #ifdef CONFIG_JFFS2_NAND |
| 79 | #include <jffs2/jffs2.h> |
| 80 | #endif |
| 81 | |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 82 | /* |
| 83 | * CONFIG_SYS_NAND_RESET_CNT is used as a timeout mechanism when resetting |
| 84 | * a flash. NAND flash is initialized prior to interrupts so standard timers |
| 85 | * can't be used. CONFIG_SYS_NAND_RESET_CNT should be set to a value |
| 86 | * which is greater than (max NAND reset time / NAND status read time). |
| 87 | * A conservative default of 200000 (500 us / 25 ns) is used as a default. |
| 88 | */ |
| 89 | #ifndef CONFIG_SYS_NAND_RESET_CNT |
| 90 | #define CONFIG_SYS_NAND_RESET_CNT 200000 |
| 91 | #endif |
| 92 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 93 | /* Define default oob placement schemes for large and small page devices */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 94 | static struct nand_ecclayout nand_oob_8 = { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 95 | .eccbytes = 3, |
| 96 | .eccpos = {0, 1, 2}, |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 97 | .oobfree = { |
| 98 | {.offset = 3, |
| 99 | .length = 2}, |
| 100 | {.offset = 6, |
| 101 | .length = 2}} |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 102 | }; |
| 103 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 104 | static struct nand_ecclayout nand_oob_16 = { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 105 | .eccbytes = 6, |
| 106 | .eccpos = {0, 1, 2, 3, 6, 7}, |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 107 | .oobfree = { |
| 108 | {.offset = 8, |
| 109 | . length = 8}} |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 110 | }; |
| 111 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 112 | static struct nand_ecclayout nand_oob_64 = { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 113 | .eccbytes = 24, |
| 114 | .eccpos = { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 115 | 40, 41, 42, 43, 44, 45, 46, 47, |
| 116 | 48, 49, 50, 51, 52, 53, 54, 55, |
| 117 | 56, 57, 58, 59, 60, 61, 62, 63}, |
| 118 | .oobfree = { |
| 119 | {.offset = 2, |
| 120 | .length = 38}} |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 121 | }; |
| 122 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 123 | static struct nand_ecclayout nand_oob_128 = { |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 124 | .eccbytes = 48, |
| 125 | .eccpos = { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 126 | 80, 81, 82, 83, 84, 85, 86, 87, |
| 127 | 88, 89, 90, 91, 92, 93, 94, 95, |
| 128 | 96, 97, 98, 99, 100, 101, 102, 103, |
| 129 | 104, 105, 106, 107, 108, 109, 110, 111, |
| 130 | 112, 113, 114, 115, 116, 117, 118, 119, |
| 131 | 120, 121, 122, 123, 124, 125, 126, 127}, |
| 132 | .oobfree = { |
| 133 | {.offset = 2, |
| 134 | .length = 78}} |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 135 | }; |
| 136 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 137 | |
| 138 | static int nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, |
| 139 | int new_state); |
| 140 | |
| 141 | static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, |
| 142 | struct mtd_oob_ops *ops); |
| 143 | |
| 144 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *this); |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 145 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 146 | /* |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 147 | * For devices which display every fart in the system on a separate LED. Is |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 148 | * compiled away when LED support is disabled. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 149 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 150 | /* XXX U-BOOT XXX */ |
| 151 | #if 0 |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 152 | DEFINE_LED_TRIGGER(nand_led_trigger); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 153 | #endif |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 154 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 155 | /** |
| 156 | * nand_release_device - [GENERIC] release chip |
| 157 | * @mtd: MTD device structure |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 158 | * |
| 159 | * Deselect, release chip lock and wake up anyone waiting on the device |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 160 | */ |
| 161 | /* XXX U-BOOT XXX */ |
| 162 | #if 0 |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 163 | static void nand_release_device(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 164 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 165 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 166 | |
| 167 | /* De-select the NAND device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 168 | chip->select_chip(mtd, -1); |
| 169 | |
| 170 | /* Release the controller and the chip */ |
| 171 | spin_lock(&chip->controller->lock); |
| 172 | chip->controller->active = NULL; |
| 173 | chip->state = FL_READY; |
| 174 | wake_up(&chip->controller->wq); |
| 175 | spin_unlock(&chip->controller->lock); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 176 | } |
| 177 | #else |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 178 | static void nand_release_device (struct mtd_info *mtd) |
| 179 | { |
| 180 | struct nand_chip *this = mtd->priv; |
| 181 | this->select_chip(mtd, -1); /* De-select the NAND device */ |
| 182 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 183 | #endif |
| 184 | |
| 185 | /** |
| 186 | * nand_read_byte - [DEFAULT] read one byte from the chip |
| 187 | * @mtd: MTD device structure |
| 188 | * |
| 189 | * Default read function for 8bit buswith |
| 190 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 191 | static uint8_t nand_read_byte(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 192 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 193 | struct nand_chip *chip = mtd->priv; |
| 194 | return readb(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /** |
| 198 | * nand_read_byte16 - [DEFAULT] read one byte endianess aware from the chip |
| 199 | * @mtd: MTD device structure |
| 200 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 201 | * Default read function for 16bit buswith with |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 202 | * endianess conversion |
| 203 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 204 | static uint8_t nand_read_byte16(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 205 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 206 | struct nand_chip *chip = mtd->priv; |
| 207 | return (uint8_t) cpu_to_le16(readw(chip->IO_ADDR_R)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /** |
| 211 | * nand_read_word - [DEFAULT] read one word from the chip |
| 212 | * @mtd: MTD device structure |
| 213 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 214 | * Default read function for 16bit buswith without |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 215 | * endianess conversion |
| 216 | */ |
| 217 | static u16 nand_read_word(struct mtd_info *mtd) |
| 218 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 219 | struct nand_chip *chip = mtd->priv; |
| 220 | return readw(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | /** |
| 224 | * nand_select_chip - [DEFAULT] control CE line |
| 225 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 226 | * @chipnr: chipnumber to select, -1 for deselect |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 227 | * |
| 228 | * Default select function for 1 chip devices. |
| 229 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 230 | static void nand_select_chip(struct mtd_info *mtd, int chipnr) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 231 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 232 | struct nand_chip *chip = mtd->priv; |
| 233 | |
| 234 | switch (chipnr) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 235 | case -1: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 236 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 237 | break; |
| 238 | case 0: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 239 | break; |
| 240 | |
| 241 | default: |
| 242 | BUG(); |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * nand_write_buf - [DEFAULT] write buffer to chip |
| 248 | * @mtd: MTD device structure |
| 249 | * @buf: data buffer |
| 250 | * @len: number of bytes to write |
| 251 | * |
| 252 | * Default write function for 8bit buswith |
| 253 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 254 | static 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] | 255 | { |
| 256 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 257 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 258 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 259 | for (i = 0; i < len; i++) |
| 260 | writeb(buf[i], chip->IO_ADDR_W); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 264 | * nand_read_buf - [DEFAULT] read chip data into buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 265 | * @mtd: MTD device structure |
| 266 | * @buf: buffer to store date |
| 267 | * @len: number of bytes to read |
| 268 | * |
| 269 | * Default read function for 8bit buswith |
| 270 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 271 | static 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] | 272 | { |
| 273 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 274 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 275 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 276 | for (i = 0; i < len; i++) |
| 277 | buf[i] = readb(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 281 | * nand_verify_buf - [DEFAULT] Verify chip data against buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 282 | * @mtd: MTD device structure |
| 283 | * @buf: buffer containing the data to compare |
| 284 | * @len: number of bytes to compare |
| 285 | * |
| 286 | * Default verify function for 8bit buswith |
| 287 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 288 | 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] | 289 | { |
| 290 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 291 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 292 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 293 | for (i = 0; i < len; i++) |
| 294 | if (buf[i] != readb(chip->IO_ADDR_R)) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 295 | return -EFAULT; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 296 | return 0; |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * nand_write_buf16 - [DEFAULT] write buffer to chip |
| 301 | * @mtd: MTD device structure |
| 302 | * @buf: data buffer |
| 303 | * @len: number of bytes to write |
| 304 | * |
| 305 | * Default write function for 16bit buswith |
| 306 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 307 | static 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] | 308 | { |
| 309 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 310 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 311 | u16 *p = (u16 *) buf; |
| 312 | len >>= 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 313 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 314 | for (i = 0; i < len; i++) |
| 315 | writew(p[i], chip->IO_ADDR_W); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 316 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 320 | * nand_read_buf16 - [DEFAULT] read chip data into buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 321 | * @mtd: MTD device structure |
| 322 | * @buf: buffer to store date |
| 323 | * @len: number of bytes to read |
| 324 | * |
| 325 | * Default read function for 16bit buswith |
| 326 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 327 | static 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] | 328 | { |
| 329 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 330 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 331 | u16 *p = (u16 *) buf; |
| 332 | len >>= 1; |
| 333 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 334 | for (i = 0; i < len; i++) |
| 335 | p[i] = readw(chip->IO_ADDR_R); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 339 | * nand_verify_buf16 - [DEFAULT] Verify chip data against buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 340 | * @mtd: MTD device structure |
| 341 | * @buf: buffer containing the data to compare |
| 342 | * @len: number of bytes to compare |
| 343 | * |
| 344 | * Default verify function for 16bit buswith |
| 345 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 346 | 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] | 347 | { |
| 348 | int i; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 349 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 350 | u16 *p = (u16 *) buf; |
| 351 | len >>= 1; |
| 352 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 353 | for (i = 0; i < len; i++) |
| 354 | if (p[i] != readw(chip->IO_ADDR_R)) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 355 | return -EFAULT; |
| 356 | |
| 357 | return 0; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * nand_block_bad - [DEFAULT] Read bad block marker from the chip |
| 362 | * @mtd: MTD device structure |
| 363 | * @ofs: offset from device start |
| 364 | * @getchip: 0, if the chip is already selected |
| 365 | * |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 366 | * Check, if the block is bad. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 367 | */ |
| 368 | static int nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) |
| 369 | { |
| 370 | int page, chipnr, res = 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 371 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 372 | u16 bad; |
| 373 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 374 | page = (int)(ofs >> chip->page_shift) & chip->pagemask; |
Thomas Knobloch | 9e2aeaf | 2007-05-05 07:04:42 +0200 | [diff] [blame] | 375 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 376 | if (getchip) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 377 | chipnr = (int)(ofs >> chip->chip_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 378 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 379 | nand_get_device(chip, mtd, FL_READING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 380 | |
| 381 | /* Select the NAND device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 382 | chip->select_chip(mtd, chipnr); |
Thomas Knobloch | 9e2aeaf | 2007-05-05 07:04:42 +0200 | [diff] [blame] | 383 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 384 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 385 | if (chip->options & NAND_BUSWIDTH_16) { |
| 386 | chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos & 0xFE, |
| 387 | page); |
| 388 | bad = cpu_to_le16(chip->read_word(mtd)); |
| 389 | if (chip->badblockpos & 0x1) |
| 390 | bad >>= 8; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 391 | if ((bad & 0xFF) != 0xff) |
| 392 | res = 1; |
| 393 | } else { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 394 | chip->cmdfunc(mtd, NAND_CMD_READOOB, chip->badblockpos, page); |
| 395 | if (chip->read_byte(mtd) != 0xff) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 396 | res = 1; |
| 397 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 398 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 399 | if (getchip) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 400 | nand_release_device(mtd); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 401 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 402 | return res; |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * nand_default_block_markbad - [DEFAULT] mark a block bad |
| 407 | * @mtd: MTD device structure |
| 408 | * @ofs: offset from device start |
| 409 | * |
| 410 | * This is the default implementation, which can be overridden by |
| 411 | * a hardware specific driver. |
| 412 | */ |
| 413 | static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) |
| 414 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 415 | struct nand_chip *chip = mtd->priv; |
| 416 | uint8_t buf[2] = { 0, 0 }; |
| 417 | int block, ret; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 418 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 419 | /* Get block number */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 420 | block = (int)(ofs >> chip->bbt_erase_shift); |
| 421 | if (chip->bbt) |
| 422 | chip->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 423 | |
| 424 | /* Do we have a flash based bad block table ? */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 425 | if (chip->options & NAND_USE_FLASH_BBT) |
| 426 | ret = nand_update_bbt(mtd, ofs); |
| 427 | else { |
| 428 | /* We write two bytes, so we dont have to mess with 16 bit |
| 429 | * access |
| 430 | */ |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 431 | nand_get_device(chip, mtd, FL_WRITING); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 432 | ofs += mtd->oobsize; |
| 433 | chip->ops.len = chip->ops.ooblen = 2; |
| 434 | chip->ops.datbuf = NULL; |
| 435 | chip->ops.oobbuf = buf; |
| 436 | chip->ops.ooboffs = chip->badblockpos & ~0x01; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 437 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 438 | ret = nand_do_write_oob(mtd, ofs, &chip->ops); |
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; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 457 | /* Check the WP bit */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 458 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
| 459 | return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 460 | } |
Markus Klotzbücher | 27eba14 | 2006-03-06 15:04:25 +0100 | [diff] [blame] | 461 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 462 | /** |
| 463 | * nand_block_checkbad - [GENERIC] Check if a block is marked bad |
| 464 | * @mtd: MTD device structure |
| 465 | * @ofs: offset from device start |
| 466 | * @getchip: 0, if the chip is already selected |
| 467 | * @allowbbt: 1, if its allowed to access the bbt area |
| 468 | * |
| 469 | * Check, if the block is bad. Either by reading the bad block table or |
| 470 | * calling of the scan function. |
| 471 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 472 | static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, |
| 473 | int allowbbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 474 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 475 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 476 | |
Ilya Yanok | a2d4dfe | 2008-06-30 15:34:40 +0200 | [diff] [blame] | 477 | if (!(chip->options & NAND_BBT_SCANNED)) { |
Ilya Yanok | a2d4dfe | 2008-06-30 15:34:40 +0200 | [diff] [blame] | 478 | chip->options |= NAND_BBT_SCANNED; |
Scott Wood | 11b12a3 | 2008-12-16 14:24:16 -0600 | [diff] [blame] | 479 | chip->scan_bbt(mtd); |
Ilya Yanok | a2d4dfe | 2008-06-30 15:34:40 +0200 | [diff] [blame] | 480 | } |
| 481 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 482 | if (!chip->bbt) |
| 483 | return chip->block_bad(mtd, ofs, getchip); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 484 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 485 | /* Return info from the table */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 486 | return nand_isbad_bbt(mtd, ofs, allowbbt); |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * Wait for the ready pin, after a command |
| 491 | * The timeout is catched later. |
| 492 | */ |
| 493 | /* XXX U-BOOT XXX */ |
| 494 | #if 0 |
| 495 | void nand_wait_ready(struct mtd_info *mtd) |
| 496 | { |
| 497 | struct nand_chip *chip = mtd->priv; |
| 498 | unsigned long timeo = jiffies + 2; |
| 499 | |
| 500 | led_trigger_event(nand_led_trigger, LED_FULL); |
| 501 | /* wait until command is processed or timeout occures */ |
| 502 | do { |
| 503 | if (chip->dev_ready(mtd)) |
| 504 | break; |
| 505 | touch_softlockup_watchdog(); |
| 506 | } while (time_before(jiffies, timeo)); |
| 507 | led_trigger_event(nand_led_trigger, LED_OFF); |
| 508 | } |
| 509 | EXPORT_SYMBOL_GPL(nand_wait_ready); |
| 510 | #else |
| 511 | void nand_wait_ready(struct mtd_info *mtd) |
| 512 | { |
| 513 | struct nand_chip *chip = mtd->priv; |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 514 | u32 timeo = (CONFIG_SYS_HZ * 20) / 1000; |
Stefan Roese | a5c312c | 2008-01-05 16:43:25 +0100 | [diff] [blame] | 515 | |
| 516 | reset_timer(); |
| 517 | |
| 518 | /* wait until command is processed or timeout occures */ |
| 519 | while (get_timer(0) < timeo) { |
| 520 | if (chip->dev_ready) |
| 521 | if (chip->dev_ready(mtd)) |
| 522 | break; |
| 523 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 524 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 525 | #endif |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 526 | |
| 527 | /** |
| 528 | * nand_command - [DEFAULT] Send command to NAND device |
| 529 | * @mtd: MTD device structure |
| 530 | * @command: the command to be sent |
| 531 | * @column: the column address for this command, -1 if none |
| 532 | * @page_addr: the page address for this command, -1 if none |
| 533 | * |
| 534 | * Send command to NAND device. This function is used for small page |
| 535 | * devices (256/512 Bytes per page) |
| 536 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 537 | static void nand_command(struct mtd_info *mtd, unsigned int command, |
| 538 | int column, int page_addr) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 539 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 540 | register struct nand_chip *chip = mtd->priv; |
| 541 | int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE; |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 542 | uint32_t rst_sts_cnt = CONFIG_SYS_NAND_RESET_CNT; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 543 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 544 | /* |
| 545 | * Write out the command to the device. |
| 546 | */ |
| 547 | if (command == NAND_CMD_SEQIN) { |
| 548 | int readcmd; |
| 549 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 550 | if (column >= mtd->writesize) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 551 | /* OOB area */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 552 | column -= mtd->writesize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 553 | readcmd = NAND_CMD_READOOB; |
| 554 | } else if (column < 256) { |
| 555 | /* First 256 bytes --> READ0 */ |
| 556 | readcmd = NAND_CMD_READ0; |
| 557 | } else { |
| 558 | column -= 256; |
| 559 | readcmd = NAND_CMD_READ1; |
| 560 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 561 | chip->cmd_ctrl(mtd, readcmd, ctrl); |
| 562 | ctrl &= ~NAND_CTRL_CHANGE; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 563 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 564 | chip->cmd_ctrl(mtd, command, ctrl); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 565 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 566 | /* |
| 567 | * Address cycle, when necessary |
| 568 | */ |
| 569 | ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE; |
| 570 | /* Serially input address */ |
| 571 | if (column != -1) { |
| 572 | /* Adjust columns for 16 bit buswidth */ |
| 573 | if (chip->options & NAND_BUSWIDTH_16) |
| 574 | column >>= 1; |
| 575 | chip->cmd_ctrl(mtd, column, ctrl); |
| 576 | ctrl &= ~NAND_CTRL_CHANGE; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 577 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 578 | if (page_addr != -1) { |
| 579 | chip->cmd_ctrl(mtd, page_addr, ctrl); |
| 580 | ctrl &= ~NAND_CTRL_CHANGE; |
| 581 | chip->cmd_ctrl(mtd, page_addr >> 8, ctrl); |
| 582 | /* One more address cycle for devices > 32MiB */ |
| 583 | if (chip->chipsize > (32 << 20)) |
| 584 | chip->cmd_ctrl(mtd, page_addr >> 16, ctrl); |
| 585 | } |
| 586 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 587 | |
| 588 | /* |
| 589 | * program and erase have their own busy handlers |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 590 | * status and sequential in needs no delay |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 591 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 592 | switch (command) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 593 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 594 | case NAND_CMD_PAGEPROG: |
| 595 | case NAND_CMD_ERASE1: |
| 596 | case NAND_CMD_ERASE2: |
| 597 | case NAND_CMD_SEQIN: |
| 598 | case NAND_CMD_STATUS: |
| 599 | return; |
| 600 | |
| 601 | case NAND_CMD_RESET: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 602 | if (chip->dev_ready) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 603 | break; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 604 | udelay(chip->chip_delay); |
| 605 | chip->cmd_ctrl(mtd, NAND_CMD_STATUS, |
| 606 | NAND_CTRL_CLE | NAND_CTRL_CHANGE); |
| 607 | chip->cmd_ctrl(mtd, |
| 608 | NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 609 | while (!(chip->read_byte(mtd) & NAND_STATUS_READY) && |
| 610 | (rst_sts_cnt--)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 611 | return; |
| 612 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 613 | /* This applies to read commands */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 614 | default: |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 615 | /* |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 616 | * If we don't have access to the busy pin, we apply the given |
| 617 | * command delay |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 618 | */ |
| 619 | if (!chip->dev_ready) { |
| 620 | udelay(chip->chip_delay); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 621 | return; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 622 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 623 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 624 | /* Apply this short delay always to ensure that we do wait tWB in |
| 625 | * any case on any machine. */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 626 | ndelay(100); |
| 627 | |
| 628 | nand_wait_ready(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | /** |
| 632 | * nand_command_lp - [DEFAULT] Send command to NAND large page device |
| 633 | * @mtd: MTD device structure |
| 634 | * @command: the command to be sent |
| 635 | * @column: the column address for this command, -1 if none |
| 636 | * @page_addr: the page address for this command, -1 if none |
| 637 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 638 | * Send command to NAND device. This is the version for the new large page |
| 639 | * devices We dont have the separate regions as we have in the small page |
| 640 | * devices. We must emulate NAND_CMD_READOOB to keep the code compatible. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 641 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 642 | static void nand_command_lp(struct mtd_info *mtd, unsigned int command, |
| 643 | int column, int page_addr) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 644 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 645 | register struct nand_chip *chip = mtd->priv; |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 646 | uint32_t rst_sts_cnt = CONFIG_SYS_NAND_RESET_CNT; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 647 | |
| 648 | /* Emulate NAND_CMD_READOOB */ |
| 649 | if (command == NAND_CMD_READOOB) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 650 | column += mtd->writesize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 651 | command = NAND_CMD_READ0; |
| 652 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 653 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 654 | /* Command latch cycle */ |
| 655 | chip->cmd_ctrl(mtd, command & 0xff, |
| 656 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 657 | |
| 658 | if (column != -1 || page_addr != -1) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 659 | int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 660 | |
| 661 | /* Serially input address */ |
| 662 | if (column != -1) { |
| 663 | /* Adjust columns for 16 bit buswidth */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 664 | if (chip->options & NAND_BUSWIDTH_16) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 665 | column >>= 1; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 666 | chip->cmd_ctrl(mtd, column, ctrl); |
| 667 | ctrl &= ~NAND_CTRL_CHANGE; |
| 668 | chip->cmd_ctrl(mtd, column >> 8, ctrl); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 669 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 670 | if (page_addr != -1) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 671 | chip->cmd_ctrl(mtd, page_addr, ctrl); |
| 672 | chip->cmd_ctrl(mtd, page_addr >> 8, |
| 673 | NAND_NCE | NAND_ALE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 674 | /* One more address cycle for devices > 128MiB */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 675 | if (chip->chipsize > (128 << 20)) |
| 676 | chip->cmd_ctrl(mtd, page_addr >> 16, |
| 677 | NAND_NCE | NAND_ALE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 678 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 679 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 680 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 681 | |
| 682 | /* |
| 683 | * program and erase have their own busy handlers |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 684 | * status, sequential in, and deplete1 need no delay |
| 685 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 686 | switch (command) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 687 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 688 | case NAND_CMD_CACHEDPROG: |
| 689 | case NAND_CMD_PAGEPROG: |
| 690 | case NAND_CMD_ERASE1: |
| 691 | case NAND_CMD_ERASE2: |
| 692 | case NAND_CMD_SEQIN: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 693 | case NAND_CMD_RNDIN: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 694 | case NAND_CMD_STATUS: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 695 | case NAND_CMD_DEPLETE1: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 696 | return; |
| 697 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 698 | /* |
| 699 | * read error status commands require only a short delay |
| 700 | */ |
| 701 | case NAND_CMD_STATUS_ERROR: |
| 702 | case NAND_CMD_STATUS_ERROR0: |
| 703 | case NAND_CMD_STATUS_ERROR1: |
| 704 | case NAND_CMD_STATUS_ERROR2: |
| 705 | case NAND_CMD_STATUS_ERROR3: |
| 706 | udelay(chip->chip_delay); |
| 707 | return; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 708 | |
| 709 | case NAND_CMD_RESET: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 710 | if (chip->dev_ready) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 711 | break; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 712 | udelay(chip->chip_delay); |
| 713 | chip->cmd_ctrl(mtd, NAND_CMD_STATUS, |
| 714 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
| 715 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, |
| 716 | NAND_NCE | NAND_CTRL_CHANGE); |
Peter Tyser | f9f3622 | 2009-02-04 13:47:22 -0600 | [diff] [blame] | 717 | while (!(chip->read_byte(mtd) & NAND_STATUS_READY) && |
| 718 | (rst_sts_cnt--)); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 719 | return; |
| 720 | |
| 721 | case NAND_CMD_RNDOUT: |
| 722 | /* No ready / busy check necessary */ |
| 723 | chip->cmd_ctrl(mtd, NAND_CMD_RNDOUTSTART, |
| 724 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
| 725 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, |
| 726 | NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 727 | return; |
| 728 | |
| 729 | case NAND_CMD_READ0: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 730 | chip->cmd_ctrl(mtd, NAND_CMD_READSTART, |
| 731 | NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); |
| 732 | chip->cmd_ctrl(mtd, NAND_CMD_NONE, |
| 733 | NAND_NCE | NAND_CTRL_CHANGE); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 734 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 735 | /* This applies to read commands */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 736 | default: |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 737 | /* |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 738 | * If we don't have access to the busy pin, we apply the given |
| 739 | * command delay |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 740 | */ |
| 741 | if (!chip->dev_ready) { |
| 742 | udelay(chip->chip_delay); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 743 | return; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 744 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 745 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 746 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 747 | /* Apply this short delay always to ensure that we do wait tWB in |
| 748 | * any case on any machine. */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 749 | ndelay(100); |
| 750 | |
| 751 | nand_wait_ready(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | /** |
| 755 | * nand_get_device - [GENERIC] Get chip for selected access |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 756 | * @chip: the nand chip descriptor |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 757 | * @mtd: MTD device structure |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 758 | * @new_state: the state which is requested |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 759 | * |
| 760 | * Get the device and lock it for exclusive access |
| 761 | */ |
| 762 | /* XXX U-BOOT XXX */ |
| 763 | #if 0 |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 764 | static int |
| 765 | nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 766 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 767 | spinlock_t *lock = &chip->controller->lock; |
| 768 | wait_queue_head_t *wq = &chip->controller->wq; |
| 769 | DECLARE_WAITQUEUE(wait, current); |
| 770 | retry: |
| 771 | spin_lock(lock); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 772 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 773 | /* Hardware controller shared among independend devices */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 774 | /* Hardware controller shared among independend devices */ |
| 775 | if (!chip->controller->active) |
| 776 | chip->controller->active = chip; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 777 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 778 | if (chip->controller->active == chip && chip->state == FL_READY) { |
| 779 | chip->state = new_state; |
| 780 | spin_unlock(lock); |
| 781 | return 0; |
| 782 | } |
| 783 | if (new_state == FL_PM_SUSPENDED) { |
| 784 | spin_unlock(lock); |
| 785 | return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 786 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 787 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 788 | add_wait_queue(wq, &wait); |
| 789 | spin_unlock(lock); |
| 790 | schedule(); |
| 791 | remove_wait_queue(wq, &wait); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 792 | goto retry; |
| 793 | } |
| 794 | #else |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 795 | static int nand_get_device (struct nand_chip *this, struct mtd_info *mtd, int new_state) |
| 796 | { |
Marcel Ziswiler | f30a2aa | 2008-06-22 16:30:06 +0200 | [diff] [blame] | 797 | this->state = new_state; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 798 | return 0; |
| 799 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 800 | #endif |
| 801 | |
| 802 | /** |
| 803 | * nand_wait - [DEFAULT] wait until the command is done |
| 804 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 805 | * @chip: NAND chip structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 806 | * |
| 807 | * Wait for command done. This applies to erase and program only |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 808 | * 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] | 809 | * general NAND and SmartMedia specs |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 810 | */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 811 | /* XXX U-BOOT XXX */ |
| 812 | #if 0 |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 813 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) |
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 | |
| 816 | unsigned long timeo = jiffies; |
| 817 | int status, state = chip->state; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 818 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 819 | if (state == FL_ERASING) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 820 | timeo += (HZ * 400) / 1000; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 821 | else |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 822 | timeo += (HZ * 20) / 1000; |
| 823 | |
| 824 | led_trigger_event(nand_led_trigger, LED_FULL); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 825 | |
| 826 | /* Apply this short delay always to ensure that we do wait tWB in |
| 827 | * any case on any machine. */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 828 | ndelay(100); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 829 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 830 | if ((state == FL_ERASING) && (chip->options & NAND_IS_AND)) |
| 831 | chip->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 832 | else |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 833 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 834 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 835 | while (time_before(jiffies, timeo)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 836 | if (chip->dev_ready) { |
| 837 | if (chip->dev_ready(mtd)) |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 838 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 839 | } else { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 840 | if (chip->read_byte(mtd) & NAND_STATUS_READY) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 841 | break; |
| 842 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 843 | cond_resched(); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 844 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 845 | led_trigger_event(nand_led_trigger, LED_OFF); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 846 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 847 | status = (int)chip->read_byte(mtd); |
| 848 | return status; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 849 | } |
| 850 | #else |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 851 | static int nand_wait(struct mtd_info *mtd, struct nand_chip *this) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 852 | { |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 853 | unsigned long timeo; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 854 | int state = this->state; |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 855 | |
| 856 | if (state == FL_ERASING) |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 857 | timeo = (CONFIG_SYS_HZ * 400) / 1000; |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 858 | else |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 859 | timeo = (CONFIG_SYS_HZ * 20) / 1000; |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 860 | |
| 861 | if ((state == FL_ERASING) && (this->options & NAND_IS_AND)) |
| 862 | this->cmdfunc(mtd, NAND_CMD_STATUS_MULTI, -1, -1); |
| 863 | else |
| 864 | this->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
| 865 | |
Bartlomiej Sieka | 6eed2ab | 2006-02-24 09:37:22 +0100 | [diff] [blame] | 866 | reset_timer(); |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 867 | |
| 868 | while (1) { |
Bartlomiej Sieka | 6eed2ab | 2006-02-24 09:37:22 +0100 | [diff] [blame] | 869 | if (get_timer(0) > timeo) { |
| 870 | printf("Timeout!"); |
Stefan Roese | ef26d24 | 2006-11-27 17:22:19 +0100 | [diff] [blame] | 871 | return 0x01; |
| 872 | } |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 873 | |
| 874 | if (this->dev_ready) { |
| 875 | if (this->dev_ready(mtd)) |
| 876 | break; |
| 877 | } else { |
| 878 | if (this->read_byte(mtd) & NAND_STATUS_READY) |
| 879 | break; |
| 880 | } |
| 881 | } |
Bartlomiej Sieka | 582f1a3 | 2006-03-05 18:57:33 +0100 | [diff] [blame] | 882 | #ifdef PPCHAMELON_NAND_TIMER_HACK |
Bartlomiej Sieka | 6eed2ab | 2006-02-24 09:37:22 +0100 | [diff] [blame] | 883 | reset_timer(); |
| 884 | while (get_timer(0) < 10); |
Bartlomiej Sieka | 582f1a3 | 2006-03-05 18:57:33 +0100 | [diff] [blame] | 885 | #endif /* PPCHAMELON_NAND_TIMER_HACK */ |
Bartlomiej Sieka | 6eed2ab | 2006-02-24 09:37:22 +0100 | [diff] [blame] | 886 | |
Wolfgang Denk | 9a08dd1 | 2005-11-02 14:29:12 +0100 | [diff] [blame] | 887 | return this->read_byte(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 888 | } |
| 889 | #endif |
| 890 | |
| 891 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 892 | * nand_read_page_raw - [Intern] read raw page data without ecc |
| 893 | * @mtd: mtd info structure |
| 894 | * @chip: nand chip info structure |
| 895 | * @buf: buffer to store read data |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 896 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 897 | static int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, |
| 898 | uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 899 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 900 | chip->read_buf(mtd, buf, mtd->writesize); |
| 901 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 902 | return 0; |
| 903 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 904 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 905 | /** |
| 906 | * nand_read_page_swecc - [REPLACABLE] software ecc based page read function |
| 907 | * @mtd: mtd info structure |
| 908 | * @chip: nand chip info structure |
| 909 | * @buf: buffer to store read data |
| 910 | */ |
| 911 | static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, |
| 912 | uint8_t *buf) |
| 913 | { |
| 914 | int i, eccsize = chip->ecc.size; |
| 915 | int eccbytes = chip->ecc.bytes; |
| 916 | int eccsteps = chip->ecc.steps; |
| 917 | uint8_t *p = buf; |
| 918 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 919 | uint8_t *ecc_code = chip->buffers->ecccode; |
| 920 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 921 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 922 | chip->ecc.read_page_raw(mtd, chip, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 923 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 924 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) |
| 925 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 926 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 927 | for (i = 0; i < chip->ecc.total; i++) |
| 928 | ecc_code[i] = chip->oob_poi[eccpos[i]]; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 929 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 930 | eccsteps = chip->ecc.steps; |
| 931 | p = buf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 932 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 933 | for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 934 | int stat; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 935 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 936 | stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 937 | if (stat < 0) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 938 | mtd->ecc_stats.failed++; |
| 939 | else |
| 940 | mtd->ecc_stats.corrected += stat; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 941 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 942 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 943 | } |
| 944 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 945 | /** |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 946 | * nand_read_subpage - [REPLACABLE] software ecc based sub-page read function |
| 947 | * @mtd: mtd info structure |
| 948 | * @chip: nand chip info structure |
| 949 | * @dataofs offset of requested data within the page |
| 950 | * @readlen data length |
| 951 | * @buf: buffer to store read data |
| 952 | */ |
| 953 | static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, uint32_t data_offs, uint32_t readlen, uint8_t *bufpoi) |
| 954 | { |
| 955 | int start_step, end_step, num_steps; |
| 956 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
| 957 | uint8_t *p; |
| 958 | int data_col_addr, i, gaps = 0; |
| 959 | int datafrag_len, eccfrag_len, aligned_len, aligned_pos; |
| 960 | int busw = (chip->options & NAND_BUSWIDTH_16) ? 2 : 1; |
| 961 | |
| 962 | /* Column address wihin the page aligned to ECC size (256bytes). */ |
| 963 | start_step = data_offs / chip->ecc.size; |
| 964 | end_step = (data_offs + readlen - 1) / chip->ecc.size; |
| 965 | num_steps = end_step - start_step + 1; |
| 966 | |
| 967 | /* Data size aligned to ECC ecc.size*/ |
| 968 | datafrag_len = num_steps * chip->ecc.size; |
| 969 | eccfrag_len = num_steps * chip->ecc.bytes; |
| 970 | |
| 971 | data_col_addr = start_step * chip->ecc.size; |
| 972 | /* If we read not a page aligned data */ |
| 973 | if (data_col_addr != 0) |
| 974 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_col_addr, -1); |
| 975 | |
| 976 | p = bufpoi + data_col_addr; |
| 977 | chip->read_buf(mtd, p, datafrag_len); |
| 978 | |
| 979 | /* Calculate ECC */ |
| 980 | for (i = 0; i < eccfrag_len ; i += chip->ecc.bytes, p += chip->ecc.size) |
| 981 | chip->ecc.calculate(mtd, p, &chip->buffers->ecccalc[i]); |
| 982 | |
| 983 | /* The performance is faster if to position offsets |
| 984 | according to ecc.pos. Let make sure here that |
| 985 | there are no gaps in ecc positions */ |
| 986 | for (i = 0; i < eccfrag_len - 1; i++) { |
| 987 | if (eccpos[i + start_step * chip->ecc.bytes] + 1 != |
| 988 | eccpos[i + start_step * chip->ecc.bytes + 1]) { |
| 989 | gaps = 1; |
| 990 | break; |
| 991 | } |
| 992 | } |
| 993 | if (gaps) { |
| 994 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1); |
| 995 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 996 | } else { |
| 997 | /* send the command to read the particular ecc bytes */ |
| 998 | /* take care about buswidth alignment in read_buf */ |
| 999 | aligned_pos = eccpos[start_step * chip->ecc.bytes] & ~(busw - 1); |
| 1000 | aligned_len = eccfrag_len; |
| 1001 | if (eccpos[start_step * chip->ecc.bytes] & (busw - 1)) |
| 1002 | aligned_len++; |
| 1003 | if (eccpos[(start_step + num_steps) * chip->ecc.bytes] & (busw - 1)) |
| 1004 | aligned_len++; |
| 1005 | |
| 1006 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize + aligned_pos, -1); |
| 1007 | chip->read_buf(mtd, &chip->oob_poi[aligned_pos], aligned_len); |
| 1008 | } |
| 1009 | |
| 1010 | for (i = 0; i < eccfrag_len; i++) |
| 1011 | chip->buffers->ecccode[i] = chip->oob_poi[eccpos[i + start_step * chip->ecc.bytes]]; |
| 1012 | |
| 1013 | p = bufpoi + data_col_addr; |
| 1014 | for (i = 0; i < eccfrag_len ; i += chip->ecc.bytes, p += chip->ecc.size) { |
| 1015 | int stat; |
| 1016 | |
| 1017 | stat = chip->ecc.correct(mtd, p, &chip->buffers->ecccode[i], &chip->buffers->ecccalc[i]); |
| 1018 | if (stat < 0) |
| 1019 | mtd->ecc_stats.failed++; |
| 1020 | else |
| 1021 | mtd->ecc_stats.corrected += stat; |
| 1022 | } |
| 1023 | return 0; |
| 1024 | } |
| 1025 | |
| 1026 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1027 | * nand_read_page_hwecc - [REPLACABLE] hardware ecc based page read function |
| 1028 | * @mtd: mtd info structure |
| 1029 | * @chip: nand chip info structure |
| 1030 | * @buf: buffer to store read data |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1031 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1032 | * Not for syndrome calculating ecc controllers which need a special oob layout |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1033 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1034 | static int nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, |
| 1035 | uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1036 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1037 | int i, eccsize = chip->ecc.size; |
| 1038 | int eccbytes = chip->ecc.bytes; |
| 1039 | int eccsteps = chip->ecc.steps; |
| 1040 | uint8_t *p = buf; |
| 1041 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 1042 | uint8_t *ecc_code = chip->buffers->ecccode; |
| 1043 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1044 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1045 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1046 | chip->ecc.hwctl(mtd, NAND_ECC_READ); |
| 1047 | chip->read_buf(mtd, p, eccsize); |
| 1048 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
| 1049 | } |
| 1050 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1051 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1052 | for (i = 0; i < chip->ecc.total; i++) |
| 1053 | ecc_code[i] = chip->oob_poi[eccpos[i]]; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1054 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1055 | eccsteps = chip->ecc.steps; |
| 1056 | p = buf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1057 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1058 | for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1059 | int stat; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1060 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1061 | stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]); |
| 1062 | if (stat == -1) |
| 1063 | mtd->ecc_stats.failed++; |
| 1064 | else |
| 1065 | mtd->ecc_stats.corrected += stat; |
| 1066 | } |
| 1067 | return 0; |
| 1068 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1069 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1070 | /** |
| 1071 | * nand_read_page_syndrome - [REPLACABLE] hardware ecc syndrom based page read |
| 1072 | * @mtd: mtd info structure |
| 1073 | * @chip: nand chip info structure |
| 1074 | * @buf: buffer to store read data |
| 1075 | * |
| 1076 | * The hw generator calculates the error syndrome automatically. Therefor |
| 1077 | * we need a special oob layout and handling. |
| 1078 | */ |
| 1079 | static int nand_read_page_syndrome(struct mtd_info *mtd, struct nand_chip *chip, |
| 1080 | uint8_t *buf) |
| 1081 | { |
| 1082 | int i, eccsize = chip->ecc.size; |
| 1083 | int eccbytes = chip->ecc.bytes; |
| 1084 | int eccsteps = chip->ecc.steps; |
| 1085 | uint8_t *p = buf; |
| 1086 | uint8_t *oob = chip->oob_poi; |
| 1087 | |
| 1088 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1089 | int stat; |
| 1090 | |
| 1091 | chip->ecc.hwctl(mtd, NAND_ECC_READ); |
| 1092 | chip->read_buf(mtd, p, eccsize); |
| 1093 | |
| 1094 | if (chip->ecc.prepad) { |
| 1095 | chip->read_buf(mtd, oob, chip->ecc.prepad); |
| 1096 | oob += chip->ecc.prepad; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1097 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1098 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1099 | chip->ecc.hwctl(mtd, NAND_ECC_READSYN); |
| 1100 | chip->read_buf(mtd, oob, eccbytes); |
| 1101 | stat = chip->ecc.correct(mtd, p, oob, NULL); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1102 | |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 1103 | if (stat < 0) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1104 | mtd->ecc_stats.failed++; |
| 1105 | else |
| 1106 | mtd->ecc_stats.corrected += stat; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1107 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1108 | oob += eccbytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1109 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1110 | if (chip->ecc.postpad) { |
| 1111 | chip->read_buf(mtd, oob, chip->ecc.postpad); |
| 1112 | oob += chip->ecc.postpad; |
| 1113 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1114 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1115 | |
| 1116 | /* Calculate remaining oob bytes */ |
| 1117 | i = mtd->oobsize - (oob - chip->oob_poi); |
| 1118 | if (i) |
| 1119 | chip->read_buf(mtd, oob, i); |
| 1120 | |
| 1121 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1122 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1123 | |
| 1124 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1125 | * nand_transfer_oob - [Internal] Transfer oob to client buffer |
| 1126 | * @chip: nand chip structure |
| 1127 | * @oob: oob destination address |
| 1128 | * @ops: oob ops structure |
| 1129 | * @len: size of oob to transfer |
| 1130 | */ |
| 1131 | static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, |
| 1132 | struct mtd_oob_ops *ops, size_t len) |
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 | switch(ops->mode) { |
| 1135 | |
| 1136 | case MTD_OOB_PLACE: |
| 1137 | case MTD_OOB_RAW: |
| 1138 | memcpy(oob, chip->oob_poi + ops->ooboffs, len); |
| 1139 | return oob + len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1140 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1141 | case MTD_OOB_AUTO: { |
| 1142 | struct nand_oobfree *free = chip->ecc.layout->oobfree; |
| 1143 | uint32_t boffs = 0, roffs = ops->ooboffs; |
| 1144 | size_t bytes = 0; |
| 1145 | |
| 1146 | for(; free->length && len; free++, len -= bytes) { |
| 1147 | /* Read request not from offset 0 ? */ |
| 1148 | if (unlikely(roffs)) { |
| 1149 | if (roffs >= free->length) { |
| 1150 | roffs -= free->length; |
| 1151 | continue; |
| 1152 | } |
| 1153 | boffs = free->offset + roffs; |
| 1154 | bytes = min_t(size_t, len, |
| 1155 | (free->length - roffs)); |
| 1156 | roffs = 0; |
| 1157 | } else { |
| 1158 | bytes = min_t(size_t, len, free->length); |
| 1159 | boffs = free->offset; |
| 1160 | } |
| 1161 | memcpy(oob, chip->oob_poi + boffs, bytes); |
| 1162 | oob += bytes; |
| 1163 | } |
| 1164 | return oob; |
| 1165 | } |
| 1166 | default: |
| 1167 | BUG(); |
| 1168 | } |
| 1169 | return NULL; |
| 1170 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1171 | |
| 1172 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1173 | * nand_do_read_ops - [Internal] Read data with ECC |
| 1174 | * |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1175 | * @mtd: MTD device structure |
| 1176 | * @from: offset to read from |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1177 | * @ops: oob ops structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1178 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1179 | * Internal function. Called with chip held. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1180 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1181 | static int nand_do_read_ops(struct mtd_info *mtd, loff_t from, |
| 1182 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1183 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1184 | int chipnr, page, realpage, col, bytes, aligned; |
| 1185 | struct nand_chip *chip = mtd->priv; |
| 1186 | struct mtd_ecc_stats stats; |
| 1187 | int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; |
| 1188 | int sndcmd = 1; |
| 1189 | int ret = 0; |
| 1190 | uint32_t readlen = ops->len; |
| 1191 | uint32_t oobreadlen = ops->ooblen; |
| 1192 | uint8_t *bufpoi, *oob, *buf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1193 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1194 | stats = mtd->ecc_stats; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1195 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1196 | chipnr = (int)(from >> chip->chip_shift); |
| 1197 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1198 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1199 | realpage = (int)(from >> chip->page_shift); |
| 1200 | page = realpage & chip->pagemask; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1201 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1202 | col = (int)(from & (mtd->writesize - 1)); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1203 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1204 | buf = ops->datbuf; |
| 1205 | oob = ops->oobbuf; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1206 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1207 | while(1) { |
| 1208 | bytes = min(mtd->writesize - col, readlen); |
| 1209 | aligned = (bytes == mtd->writesize); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1210 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1211 | /* Is the current page in the buffer ? */ |
| 1212 | if (realpage != chip->pagebuf || oob) { |
| 1213 | bufpoi = aligned ? buf : chip->buffers->databuf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1214 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1215 | if (likely(sndcmd)) { |
| 1216 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page); |
| 1217 | sndcmd = 0; |
| 1218 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1219 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1220 | /* Now read the page into the buffer */ |
| 1221 | if (unlikely(ops->mode == MTD_OOB_RAW)) |
| 1222 | ret = chip->ecc.read_page_raw(mtd, chip, bufpoi); |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 1223 | else if (!aligned && NAND_SUBPAGE_READ(chip) && !oob) |
| 1224 | ret = chip->ecc.read_subpage(mtd, chip, col, bytes, bufpoi); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1225 | else |
| 1226 | ret = chip->ecc.read_page(mtd, chip, bufpoi); |
| 1227 | if (ret < 0) |
| 1228 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1229 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1230 | /* Transfer not aligned data */ |
| 1231 | if (!aligned) { |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 1232 | if (!NAND_SUBPAGE_READ(chip) && !oob) |
| 1233 | chip->pagebuf = realpage; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1234 | memcpy(buf, chip->buffers->databuf + col, bytes); |
| 1235 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1236 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1237 | buf += bytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1238 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1239 | if (unlikely(oob)) { |
| 1240 | /* Raw mode does data:oob:data:oob */ |
| 1241 | if (ops->mode != MTD_OOB_RAW) { |
| 1242 | int toread = min(oobreadlen, |
| 1243 | chip->ecc.layout->oobavail); |
| 1244 | if (toread) { |
| 1245 | oob = nand_transfer_oob(chip, |
| 1246 | oob, ops, toread); |
| 1247 | oobreadlen -= toread; |
| 1248 | } |
| 1249 | } else |
| 1250 | buf = nand_transfer_oob(chip, |
| 1251 | buf, ops, mtd->oobsize); |
| 1252 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1253 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1254 | if (!(chip->options & NAND_NO_READRDY)) { |
| 1255 | /* |
| 1256 | * Apply delay or wait for ready/busy pin. Do |
| 1257 | * this before the AUTOINCR check, so no |
| 1258 | * problems arise if a chip which does auto |
| 1259 | * increment is marked as NOAUTOINCR by the |
| 1260 | * board driver. |
| 1261 | */ |
| 1262 | if (!chip->dev_ready) |
| 1263 | udelay(chip->chip_delay); |
| 1264 | else |
| 1265 | nand_wait_ready(mtd); |
| 1266 | } |
| 1267 | } else { |
| 1268 | memcpy(buf, chip->buffers->databuf + col, bytes); |
| 1269 | buf += bytes; |
| 1270 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1271 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1272 | readlen -= bytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1273 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1274 | if (!readlen) |
| 1275 | break; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1276 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1277 | /* For subsequent reads align to page boundary. */ |
| 1278 | col = 0; |
| 1279 | /* Increment page address */ |
| 1280 | realpage++; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1281 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1282 | page = realpage & chip->pagemask; |
| 1283 | /* Check, if we cross a chip boundary */ |
| 1284 | if (!page) { |
| 1285 | chipnr++; |
| 1286 | chip->select_chip(mtd, -1); |
| 1287 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1288 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1289 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1290 | /* Check, if the chip supports auto page increment |
| 1291 | * or if we have hit a block boundary. |
| 1292 | */ |
| 1293 | if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) |
| 1294 | sndcmd = 1; |
| 1295 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1296 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1297 | ops->retlen = ops->len - (size_t) readlen; |
| 1298 | if (oob) |
| 1299 | ops->oobretlen = ops->ooblen - oobreadlen; |
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 | if (ret) |
| 1302 | return ret; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1303 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1304 | if (mtd->ecc_stats.failed - stats.failed) |
| 1305 | return -EBADMSG; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1306 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1307 | return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; |
| 1308 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1309 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1310 | /** |
| 1311 | * nand_read - [MTD Interface] MTD compability function for nand_do_read_ecc |
| 1312 | * @mtd: MTD device structure |
| 1313 | * @from: offset to read from |
| 1314 | * @len: number of bytes to read |
| 1315 | * @retlen: pointer to variable to store the number of read bytes |
| 1316 | * @buf: the databuffer to put data |
| 1317 | * |
| 1318 | * Get hold of the chip and call nand_do_read |
| 1319 | */ |
| 1320 | static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 1321 | size_t *retlen, uint8_t *buf) |
| 1322 | { |
| 1323 | struct nand_chip *chip = mtd->priv; |
| 1324 | int ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1325 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1326 | /* Do not allow reads past end of device */ |
| 1327 | if ((from + len) > mtd->size) |
| 1328 | return -EINVAL; |
| 1329 | if (!len) |
| 1330 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1331 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1332 | nand_get_device(chip, mtd, FL_READING); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1333 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1334 | chip->ops.len = len; |
| 1335 | chip->ops.datbuf = buf; |
| 1336 | chip->ops.oobbuf = NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1337 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1338 | ret = nand_do_read_ops(mtd, from, &chip->ops); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1339 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1340 | *retlen = chip->ops.retlen; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1341 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1342 | nand_release_device(mtd); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1343 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1344 | return ret; |
| 1345 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1346 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1347 | /** |
| 1348 | * nand_read_oob_std - [REPLACABLE] the most common OOB data read function |
| 1349 | * @mtd: mtd info structure |
| 1350 | * @chip: nand chip info structure |
| 1351 | * @page: page number to read |
| 1352 | * @sndcmd: flag whether to issue read command or not |
| 1353 | */ |
| 1354 | static int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, |
| 1355 | int page, int sndcmd) |
| 1356 | { |
| 1357 | if (sndcmd) { |
| 1358 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); |
| 1359 | sndcmd = 0; |
| 1360 | } |
| 1361 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 1362 | return sndcmd; |
| 1363 | } |
| 1364 | |
| 1365 | /** |
| 1366 | * nand_read_oob_syndrome - [REPLACABLE] OOB data read function for HW ECC |
| 1367 | * with syndromes |
| 1368 | * @mtd: mtd info structure |
| 1369 | * @chip: nand chip info structure |
| 1370 | * @page: page number to read |
| 1371 | * @sndcmd: flag whether to issue read command or not |
| 1372 | */ |
| 1373 | static int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip, |
| 1374 | int page, int sndcmd) |
| 1375 | { |
| 1376 | uint8_t *buf = chip->oob_poi; |
| 1377 | int length = mtd->oobsize; |
| 1378 | int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; |
| 1379 | int eccsize = chip->ecc.size; |
| 1380 | uint8_t *bufpoi = buf; |
| 1381 | int i, toread, sndrnd = 0, pos; |
| 1382 | |
| 1383 | chip->cmdfunc(mtd, NAND_CMD_READ0, chip->ecc.size, page); |
| 1384 | for (i = 0; i < chip->ecc.steps; i++) { |
| 1385 | if (sndrnd) { |
| 1386 | pos = eccsize + i * (eccsize + chunk); |
| 1387 | if (mtd->writesize > 512) |
| 1388 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, pos, -1); |
| 1389 | else |
| 1390 | chip->cmdfunc(mtd, NAND_CMD_READ0, pos, page); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1391 | } else |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1392 | sndrnd = 1; |
| 1393 | toread = min_t(int, length, chunk); |
| 1394 | chip->read_buf(mtd, bufpoi, toread); |
| 1395 | bufpoi += toread; |
| 1396 | length -= toread; |
| 1397 | } |
| 1398 | if (length > 0) |
| 1399 | chip->read_buf(mtd, bufpoi, length); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1400 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1401 | return 1; |
| 1402 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1403 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1404 | /** |
| 1405 | * nand_write_oob_std - [REPLACABLE] the most common OOB data write function |
| 1406 | * @mtd: mtd info structure |
| 1407 | * @chip: nand chip info structure |
| 1408 | * @page: page number to write |
| 1409 | */ |
| 1410 | static int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip, |
| 1411 | int page) |
| 1412 | { |
| 1413 | int status = 0; |
| 1414 | const uint8_t *buf = chip->oob_poi; |
| 1415 | int length = mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1416 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1417 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page); |
| 1418 | chip->write_buf(mtd, buf, length); |
| 1419 | /* Send command to program the OOB data */ |
| 1420 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1421 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1422 | status = chip->waitfunc(mtd, chip); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1423 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1424 | return status & NAND_STATUS_FAIL ? -EIO : 0; |
| 1425 | } |
| 1426 | |
| 1427 | /** |
| 1428 | * nand_write_oob_syndrome - [REPLACABLE] OOB data write function for HW ECC |
| 1429 | * with syndrome - only for large page flash ! |
| 1430 | * @mtd: mtd info structure |
| 1431 | * @chip: nand chip info structure |
| 1432 | * @page: page number to write |
| 1433 | */ |
| 1434 | static int nand_write_oob_syndrome(struct mtd_info *mtd, |
| 1435 | struct nand_chip *chip, int page) |
| 1436 | { |
| 1437 | int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; |
| 1438 | int eccsize = chip->ecc.size, length = mtd->oobsize; |
| 1439 | int i, len, pos, status = 0, sndcmd = 0, steps = chip->ecc.steps; |
| 1440 | const uint8_t *bufpoi = chip->oob_poi; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1441 | |
| 1442 | /* |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1443 | * data-ecc-data-ecc ... ecc-oob |
| 1444 | * or |
| 1445 | * data-pad-ecc-pad-data-pad .... ecc-pad-oob |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1446 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1447 | if (!chip->ecc.prepad && !chip->ecc.postpad) { |
| 1448 | pos = steps * (eccsize + chunk); |
| 1449 | steps = 0; |
| 1450 | } else |
| 1451 | pos = eccsize; |
| 1452 | |
| 1453 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page); |
| 1454 | for (i = 0; i < steps; i++) { |
| 1455 | if (sndcmd) { |
| 1456 | if (mtd->writesize <= 512) { |
| 1457 | uint32_t fill = 0xFFFFFFFF; |
| 1458 | |
| 1459 | len = eccsize; |
| 1460 | while (len > 0) { |
| 1461 | int num = min_t(int, len, 4); |
| 1462 | chip->write_buf(mtd, (uint8_t *)&fill, |
| 1463 | num); |
| 1464 | len -= num; |
| 1465 | } |
| 1466 | } else { |
| 1467 | pos = eccsize + i * (eccsize + chunk); |
| 1468 | chip->cmdfunc(mtd, NAND_CMD_RNDIN, pos, -1); |
| 1469 | } |
| 1470 | } else |
| 1471 | sndcmd = 1; |
| 1472 | len = min_t(int, length, chunk); |
| 1473 | chip->write_buf(mtd, bufpoi, len); |
| 1474 | bufpoi += len; |
| 1475 | length -= len; |
| 1476 | } |
| 1477 | if (length > 0) |
| 1478 | chip->write_buf(mtd, bufpoi, length); |
| 1479 | |
| 1480 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
| 1481 | status = chip->waitfunc(mtd, chip); |
| 1482 | |
| 1483 | return status & NAND_STATUS_FAIL ? -EIO : 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1484 | } |
| 1485 | |
| 1486 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1487 | * nand_do_read_oob - [Intern] NAND read out-of-band |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1488 | * @mtd: MTD device structure |
| 1489 | * @from: offset to read from |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1490 | * @ops: oob operations description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1491 | * |
| 1492 | * NAND read out-of-band data from the spare area |
| 1493 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1494 | static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, |
| 1495 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1496 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1497 | int page, realpage, chipnr, sndcmd = 1; |
| 1498 | struct nand_chip *chip = mtd->priv; |
| 1499 | int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; |
| 1500 | int readlen = ops->ooblen; |
| 1501 | int len; |
| 1502 | uint8_t *buf = ops->oobbuf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1503 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1504 | MTDDEBUG (MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n", |
| 1505 | (unsigned long long)from, readlen); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1506 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1507 | if (ops->mode == MTD_OOB_AUTO) |
| 1508 | len = chip->ecc.layout->oobavail; |
| 1509 | else |
| 1510 | len = mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1511 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1512 | if (unlikely(ops->ooboffs >= len)) { |
| 1513 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_read_oob: " |
| 1514 | "Attempt to start read outside oob\n"); |
| 1515 | return -EINVAL; |
| 1516 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1517 | |
| 1518 | /* Do not allow reads past end of device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1519 | if (unlikely(from >= mtd->size || |
| 1520 | ops->ooboffs + readlen > ((mtd->size >> chip->page_shift) - |
| 1521 | (from >> chip->page_shift)) * len)) { |
| 1522 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_read_oob: " |
| 1523 | "Attempt read beyond end of device\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1524 | return -EINVAL; |
| 1525 | } |
| 1526 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1527 | chipnr = (int)(from >> chip->chip_shift); |
| 1528 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1529 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1530 | /* Shift to get page */ |
| 1531 | realpage = (int)(from >> chip->page_shift); |
| 1532 | page = realpage & chip->pagemask; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1533 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1534 | while(1) { |
| 1535 | sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1536 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1537 | len = min(len, readlen); |
| 1538 | buf = nand_transfer_oob(chip, buf, ops, len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1539 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1540 | if (!(chip->options & NAND_NO_READRDY)) { |
| 1541 | /* |
| 1542 | * Apply delay or wait for ready/busy pin. Do this |
| 1543 | * before the AUTOINCR check, so no problems arise if a |
| 1544 | * chip which does auto increment is marked as |
| 1545 | * NOAUTOINCR by the board driver. |
| 1546 | */ |
| 1547 | if (!chip->dev_ready) |
| 1548 | udelay(chip->chip_delay); |
| 1549 | else |
| 1550 | nand_wait_ready(mtd); |
| 1551 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1552 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1553 | readlen -= len; |
| 1554 | if (!readlen) |
| 1555 | break; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1556 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1557 | /* Increment page address */ |
| 1558 | realpage++; |
| 1559 | |
| 1560 | page = realpage & chip->pagemask; |
| 1561 | /* Check, if we cross a chip boundary */ |
| 1562 | if (!page) { |
| 1563 | chipnr++; |
| 1564 | chip->select_chip(mtd, -1); |
| 1565 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1566 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1567 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1568 | /* Check, if the chip supports auto page increment |
| 1569 | * or if we have hit a block boundary. |
| 1570 | */ |
| 1571 | if (!NAND_CANAUTOINCR(chip) || !(page & blkcheck)) |
| 1572 | sndcmd = 1; |
| 1573 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1574 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1575 | ops->oobretlen = ops->ooblen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1576 | return 0; |
| 1577 | } |
| 1578 | |
| 1579 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1580 | * 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] | 1581 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1582 | * @from: offset to read from |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1583 | * @ops: oob operation description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1584 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1585 | * NAND read data and/or out-of-band data |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1586 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1587 | static int nand_read_oob(struct mtd_info *mtd, loff_t from, |
| 1588 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1589 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1590 | struct nand_chip *chip = mtd->priv; |
| 1591 | int ret = -ENOTSUPP; |
| 1592 | |
| 1593 | ops->retlen = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1594 | |
| 1595 | /* Do not allow reads past end of device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1596 | if (ops->datbuf && (from + ops->len) > mtd->size) { |
| 1597 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_read_oob: " |
| 1598 | "Attempt read beyond end of device\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1599 | return -EINVAL; |
| 1600 | } |
| 1601 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1602 | nand_get_device(chip, mtd, FL_READING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1603 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1604 | switch(ops->mode) { |
| 1605 | case MTD_OOB_PLACE: |
| 1606 | case MTD_OOB_AUTO: |
| 1607 | case MTD_OOB_RAW: |
| 1608 | break; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1609 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1610 | default: |
| 1611 | goto out; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1612 | } |
| 1613 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1614 | if (!ops->datbuf) |
| 1615 | ret = nand_do_read_oob(mtd, from, ops); |
| 1616 | else |
| 1617 | ret = nand_do_read_ops(mtd, from, ops); |
| 1618 | |
| 1619 | out: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1620 | nand_release_device(mtd); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1621 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1622 | } |
| 1623 | |
| 1624 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1625 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1626 | * nand_write_page_raw - [Intern] raw page write function |
| 1627 | * @mtd: mtd info structure |
| 1628 | * @chip: nand chip info structure |
| 1629 | * @buf: data buffer |
| 1630 | */ |
| 1631 | static void nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, |
| 1632 | const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1633 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1634 | chip->write_buf(mtd, buf, mtd->writesize); |
| 1635 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 1636 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1637 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1638 | /** |
| 1639 | * nand_write_page_swecc - [REPLACABLE] software ecc based page write function |
| 1640 | * @mtd: mtd info structure |
| 1641 | * @chip: nand chip info structure |
| 1642 | * @buf: data buffer |
| 1643 | */ |
| 1644 | static void nand_write_page_swecc(struct mtd_info *mtd, struct nand_chip *chip, |
| 1645 | const uint8_t *buf) |
| 1646 | { |
| 1647 | int i, eccsize = chip->ecc.size; |
| 1648 | int eccbytes = chip->ecc.bytes; |
| 1649 | int eccsteps = chip->ecc.steps; |
| 1650 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 1651 | const uint8_t *p = buf; |
| 1652 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1653 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1654 | /* Software ecc calculation */ |
| 1655 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) |
| 1656 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1657 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1658 | for (i = 0; i < chip->ecc.total; i++) |
| 1659 | chip->oob_poi[eccpos[i]] = ecc_calc[i]; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1660 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1661 | chip->ecc.write_page_raw(mtd, chip, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1662 | } |
| 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 | * nand_write_page_hwecc - [REPLACABLE] hardware ecc based page write function |
| 1666 | * @mtd: mtd info structure |
| 1667 | * @chip: nand chip info structure |
| 1668 | * @buf: data buffer |
| 1669 | */ |
| 1670 | static void nand_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, |
| 1671 | const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1672 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1673 | int i, eccsize = chip->ecc.size; |
| 1674 | int eccbytes = chip->ecc.bytes; |
| 1675 | int eccsteps = chip->ecc.steps; |
| 1676 | uint8_t *ecc_calc = chip->buffers->ecccalc; |
| 1677 | const uint8_t *p = buf; |
| 1678 | uint32_t *eccpos = chip->ecc.layout->eccpos; |
| 1679 | |
| 1680 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
| 1681 | chip->ecc.hwctl(mtd, NAND_ECC_WRITE); |
| 1682 | chip->write_buf(mtd, p, eccsize); |
| 1683 | chip->ecc.calculate(mtd, p, &ecc_calc[i]); |
| 1684 | } |
| 1685 | |
| 1686 | for (i = 0; i < chip->ecc.total; i++) |
| 1687 | chip->oob_poi[eccpos[i]] = ecc_calc[i]; |
| 1688 | |
| 1689 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1690 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1691 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1692 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1693 | * nand_write_page_syndrome - [REPLACABLE] hardware ecc syndrom based page write |
| 1694 | * @mtd: mtd info structure |
| 1695 | * @chip: nand chip info structure |
| 1696 | * @buf: data buffer |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1697 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1698 | * The hw generator calculates the error syndrome automatically. Therefor |
| 1699 | * we need a special oob layout and handling. |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1700 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1701 | static void nand_write_page_syndrome(struct mtd_info *mtd, |
| 1702 | struct nand_chip *chip, const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1703 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1704 | int i, eccsize = chip->ecc.size; |
| 1705 | int eccbytes = chip->ecc.bytes; |
| 1706 | int eccsteps = chip->ecc.steps; |
| 1707 | const uint8_t *p = buf; |
| 1708 | uint8_t *oob = chip->oob_poi; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1709 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1710 | for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1711 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1712 | chip->ecc.hwctl(mtd, NAND_ECC_WRITE); |
| 1713 | chip->write_buf(mtd, p, eccsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1714 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1715 | if (chip->ecc.prepad) { |
| 1716 | chip->write_buf(mtd, oob, chip->ecc.prepad); |
| 1717 | oob += chip->ecc.prepad; |
| 1718 | } |
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 | chip->ecc.calculate(mtd, p, oob); |
| 1721 | chip->write_buf(mtd, oob, eccbytes); |
| 1722 | oob += eccbytes; |
| 1723 | |
| 1724 | if (chip->ecc.postpad) { |
| 1725 | chip->write_buf(mtd, oob, chip->ecc.postpad); |
| 1726 | oob += chip->ecc.postpad; |
| 1727 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1728 | } |
| 1729 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1730 | /* Calculate remaining oob bytes */ |
| 1731 | i = mtd->oobsize - (oob - chip->oob_poi); |
| 1732 | if (i) |
| 1733 | chip->write_buf(mtd, oob, i); |
| 1734 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1735 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1736 | /** |
| 1737 | * nand_write_page - [REPLACEABLE] write one page |
| 1738 | * @mtd: MTD device structure |
| 1739 | * @chip: NAND chip descriptor |
| 1740 | * @buf: the data to write |
| 1741 | * @page: page number to write |
| 1742 | * @cached: cached programming |
| 1743 | * @raw: use _raw version of write_page |
| 1744 | */ |
| 1745 | static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, |
| 1746 | const uint8_t *buf, int page, int cached, int raw) |
| 1747 | { |
| 1748 | int status; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1749 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1750 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); |
| 1751 | |
| 1752 | if (unlikely(raw)) |
| 1753 | chip->ecc.write_page_raw(mtd, chip, buf); |
| 1754 | else |
| 1755 | chip->ecc.write_page(mtd, chip, buf); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1756 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1757 | /* |
| 1758 | * Cached progamming disabled for now, Not sure if its worth the |
| 1759 | * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s) |
| 1760 | */ |
| 1761 | cached = 0; |
| 1762 | |
| 1763 | if (!cached || !(chip->options & NAND_CACHEPRG)) { |
| 1764 | |
| 1765 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); |
| 1766 | status = chip->waitfunc(mtd, chip); |
| 1767 | /* |
| 1768 | * See if operation failed and additional status checks are |
| 1769 | * available |
| 1770 | */ |
| 1771 | if ((status & NAND_STATUS_FAIL) && (chip->errstat)) |
| 1772 | status = chip->errstat(mtd, chip, FL_WRITING, status, |
| 1773 | page); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1774 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1775 | if (status & NAND_STATUS_FAIL) |
| 1776 | return -EIO; |
| 1777 | } else { |
| 1778 | chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1); |
| 1779 | status = chip->waitfunc(mtd, chip); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1780 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1781 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1782 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE |
| 1783 | /* Send command to read back the data */ |
| 1784 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1785 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1786 | if (chip->verify_buf(mtd, buf, mtd->writesize)) |
| 1787 | return -EIO; |
| 1788 | #endif |
| 1789 | return 0; |
| 1790 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1791 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1792 | /** |
| 1793 | * nand_fill_oob - [Internal] Transfer client buffer to oob |
| 1794 | * @chip: nand chip structure |
| 1795 | * @oob: oob data buffer |
| 1796 | * @ops: oob ops structure |
| 1797 | */ |
| 1798 | static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob, |
| 1799 | struct mtd_oob_ops *ops) |
| 1800 | { |
| 1801 | size_t len = ops->ooblen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1802 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1803 | switch(ops->mode) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1804 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1805 | case MTD_OOB_PLACE: |
| 1806 | case MTD_OOB_RAW: |
| 1807 | memcpy(chip->oob_poi + ops->ooboffs, oob, len); |
| 1808 | return oob + len; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1809 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1810 | case MTD_OOB_AUTO: { |
| 1811 | struct nand_oobfree *free = chip->ecc.layout->oobfree; |
| 1812 | uint32_t boffs = 0, woffs = ops->ooboffs; |
| 1813 | size_t bytes = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1814 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1815 | for(; free->length && len; free++, len -= bytes) { |
| 1816 | /* Write request not from offset 0 ? */ |
| 1817 | if (unlikely(woffs)) { |
| 1818 | if (woffs >= free->length) { |
| 1819 | woffs -= free->length; |
| 1820 | continue; |
| 1821 | } |
| 1822 | boffs = free->offset + woffs; |
| 1823 | bytes = min_t(size_t, len, |
| 1824 | (free->length - woffs)); |
| 1825 | woffs = 0; |
| 1826 | } else { |
| 1827 | bytes = min_t(size_t, len, free->length); |
| 1828 | boffs = free->offset; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1829 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1830 | memcpy(chip->oob_poi + boffs, oob, bytes); |
| 1831 | oob += bytes; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1832 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1833 | return oob; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1834 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1835 | default: |
| 1836 | BUG(); |
| 1837 | } |
| 1838 | return NULL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1839 | } |
| 1840 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1841 | #define NOTALIGNED(x) (x & (chip->subpagesize - 1)) != 0 |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1842 | |
| 1843 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1844 | * nand_do_write_ops - [Internal] NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1845 | * @mtd: MTD device structure |
| 1846 | * @to: offset to write to |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1847 | * @ops: oob operations description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1848 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1849 | * NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1850 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1851 | static int nand_do_write_ops(struct mtd_info *mtd, loff_t to, |
| 1852 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1853 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1854 | int chipnr, realpage, page, blockmask, column; |
| 1855 | struct nand_chip *chip = mtd->priv; |
| 1856 | uint32_t writelen = ops->len; |
| 1857 | uint8_t *oob = ops->oobbuf; |
| 1858 | uint8_t *buf = ops->datbuf; |
| 1859 | int ret, subpage; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1860 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1861 | ops->retlen = 0; |
| 1862 | if (!writelen) |
| 1863 | return 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1864 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1865 | /* reject writes, which are not page aligned */ |
| 1866 | if (NOTALIGNED(to) || NOTALIGNED(ops->len)) { |
| 1867 | printk(KERN_NOTICE "nand_write: " |
| 1868 | "Attempt to write not page aligned data\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1869 | return -EINVAL; |
| 1870 | } |
| 1871 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1872 | column = to & (mtd->writesize - 1); |
| 1873 | subpage = column || (writelen & (mtd->writesize - 1)); |
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 | if (subpage && oob) |
| 1876 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1877 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1878 | chipnr = (int)(to >> chip->chip_shift); |
| 1879 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1880 | |
| 1881 | /* Check, if it is write protected */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1882 | if (nand_check_wp(mtd)) { |
| 1883 | printk (KERN_NOTICE "nand_do_write_ops: Device is write protected\n"); |
| 1884 | return -EIO; |
| 1885 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 1886 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1887 | realpage = (int)(to >> chip->page_shift); |
| 1888 | page = realpage & chip->pagemask; |
| 1889 | blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1890 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1891 | /* Invalidate the page cache, when we write to the cached page */ |
| 1892 | if (to <= (chip->pagebuf << chip->page_shift) && |
| 1893 | (chip->pagebuf << chip->page_shift) < (to + ops->len)) |
| 1894 | chip->pagebuf = -1; |
| 1895 | |
| 1896 | /* If we're not given explicit OOB data, let it be 0xFF */ |
| 1897 | if (likely(!oob)) |
| 1898 | memset(chip->oob_poi, 0xff, mtd->oobsize); |
| 1899 | |
| 1900 | while(1) { |
| 1901 | int bytes = mtd->writesize; |
| 1902 | int cached = writelen > bytes && page != blockmask; |
| 1903 | uint8_t *wbuf = buf; |
| 1904 | |
| 1905 | /* Partial page write ? */ |
| 1906 | if (unlikely(column || writelen < (mtd->writesize - 1))) { |
| 1907 | cached = 0; |
| 1908 | bytes = min_t(int, bytes - column, (int) writelen); |
| 1909 | chip->pagebuf = -1; |
| 1910 | memset(chip->buffers->databuf, 0xff, mtd->writesize); |
| 1911 | memcpy(&chip->buffers->databuf[column], buf, bytes); |
| 1912 | wbuf = chip->buffers->databuf; |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 1913 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1914 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1915 | if (unlikely(oob)) |
| 1916 | oob = nand_fill_oob(chip, oob, ops); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1917 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1918 | ret = chip->write_page(mtd, chip, wbuf, page, cached, |
| 1919 | (ops->mode == MTD_OOB_RAW)); |
| 1920 | if (ret) |
| 1921 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1922 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1923 | writelen -= bytes; |
| 1924 | if (!writelen) |
| 1925 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1926 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1927 | column = 0; |
| 1928 | buf += bytes; |
| 1929 | realpage++; |
| 1930 | |
| 1931 | page = realpage & chip->pagemask; |
| 1932 | /* Check, if we cross a chip boundary */ |
| 1933 | if (!page) { |
| 1934 | chipnr++; |
| 1935 | chip->select_chip(mtd, -1); |
| 1936 | chip->select_chip(mtd, chipnr); |
| 1937 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1938 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1939 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1940 | ops->retlen = ops->len - writelen; |
| 1941 | if (unlikely(oob)) |
| 1942 | ops->oobretlen = ops->ooblen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1943 | return ret; |
| 1944 | } |
| 1945 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1946 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1947 | * nand_write - [MTD Interface] NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1948 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1949 | * @to: offset to write to |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1950 | * @len: number of bytes to write |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1951 | * @retlen: pointer to variable to store the number of written bytes |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1952 | * @buf: the data to write |
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 | * NAND write with ECC |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1955 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1956 | static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 1957 | size_t *retlen, const uint8_t *buf) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1958 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1959 | struct nand_chip *chip = mtd->priv; |
| 1960 | int ret; |
| 1961 | |
| 1962 | /* Do not allow reads past end of device */ |
| 1963 | if ((to + len) > mtd->size) |
| 1964 | return -EINVAL; |
| 1965 | if (!len) |
| 1966 | return 0; |
| 1967 | |
| 1968 | nand_get_device(chip, mtd, FL_WRITING); |
| 1969 | |
| 1970 | chip->ops.len = len; |
| 1971 | chip->ops.datbuf = (uint8_t *)buf; |
| 1972 | chip->ops.oobbuf = NULL; |
| 1973 | |
| 1974 | ret = nand_do_write_ops(mtd, to, &chip->ops); |
| 1975 | |
| 1976 | *retlen = chip->ops.retlen; |
| 1977 | |
| 1978 | nand_release_device(mtd); |
| 1979 | |
| 1980 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1981 | } |
| 1982 | |
| 1983 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1984 | * nand_do_write_oob - [MTD Interface] NAND write out-of-band |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1985 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1986 | * @to: offset to write to |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1987 | * @ops: oob operation description structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1988 | * |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1989 | * NAND write out-of-band |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1990 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1991 | static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, |
| 1992 | struct mtd_oob_ops *ops) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1993 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1994 | int chipnr, page, status, len; |
| 1995 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1996 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 1997 | MTDDEBUG (MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", |
| 1998 | (unsigned int)to, (int)ops->ooblen); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 1999 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2000 | if (ops->mode == MTD_OOB_AUTO) |
| 2001 | len = chip->ecc.layout->oobavail; |
| 2002 | else |
| 2003 | len = mtd->oobsize; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2004 | |
| 2005 | /* Do not allow write past end of page */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2006 | if ((ops->ooboffs + ops->ooblen) > len) { |
| 2007 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_write_oob: " |
| 2008 | "Attempt to write past end of page\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2009 | return -EINVAL; |
| 2010 | } |
| 2011 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2012 | if (unlikely(ops->ooboffs >= len)) { |
| 2013 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_read_oob: " |
| 2014 | "Attempt to start write outside oob\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2015 | return -EINVAL; |
| 2016 | } |
| 2017 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2018 | /* Do not allow reads past end of device */ |
| 2019 | if (unlikely(to >= mtd->size || |
| 2020 | ops->ooboffs + ops->ooblen > |
| 2021 | ((mtd->size >> chip->page_shift) - |
| 2022 | (to >> chip->page_shift)) * len)) { |
| 2023 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_read_oob: " |
| 2024 | "Attempt write beyond end of device\n"); |
| 2025 | return -EINVAL; |
| 2026 | } |
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 | chipnr = (int)(to >> chip->chip_shift); |
| 2029 | chip->select_chip(mtd, chipnr); |
| 2030 | |
| 2031 | /* Shift to get page */ |
| 2032 | page = (int)(to >> chip->page_shift); |
| 2033 | |
| 2034 | /* |
| 2035 | * Reset the chip. Some chips (like the Toshiba TC5832DC found in one |
| 2036 | * of my DiskOnChip 2000 test units) will clear the whole data page too |
| 2037 | * if we don't do this. I have no clue why, but I seem to have 'fixed' |
| 2038 | * it in the doc2000 driver in August 1999. dwmw2. |
| 2039 | */ |
| 2040 | chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2041 | |
| 2042 | /* Check, if it is write protected */ |
| 2043 | if (nand_check_wp(mtd)) |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2044 | return -EROFS; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2045 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2046 | /* Invalidate the page cache, if we write to the cached page */ |
| 2047 | if (page == chip->pagebuf) |
| 2048 | chip->pagebuf = -1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2049 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2050 | memset(chip->oob_poi, 0xff, mtd->oobsize); |
| 2051 | nand_fill_oob(chip, ops->oobbuf, ops); |
| 2052 | status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask); |
| 2053 | memset(chip->oob_poi, 0xff, mtd->oobsize); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2054 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2055 | if (status) |
| 2056 | return status; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2057 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2058 | ops->oobretlen = ops->ooblen; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2059 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2060 | return 0; |
| 2061 | } |
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 | /** |
| 2064 | * nand_write_oob - [MTD Interface] NAND write data and/or out-of-band |
| 2065 | * @mtd: MTD device structure |
| 2066 | * @to: offset to write to |
| 2067 | * @ops: oob operation description structure |
| 2068 | */ |
| 2069 | static int nand_write_oob(struct mtd_info *mtd, loff_t to, |
| 2070 | struct mtd_oob_ops *ops) |
| 2071 | { |
| 2072 | struct nand_chip *chip = mtd->priv; |
| 2073 | int ret = -ENOTSUPP; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2074 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2075 | ops->retlen = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2076 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2077 | /* Do not allow writes past end of device */ |
| 2078 | if (ops->datbuf && (to + ops->len) > mtd->size) { |
| 2079 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_read_oob: " |
| 2080 | "Attempt read beyond end of device\n"); |
| 2081 | return -EINVAL; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2082 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2083 | |
| 2084 | nand_get_device(chip, mtd, FL_WRITING); |
| 2085 | |
| 2086 | switch(ops->mode) { |
| 2087 | case MTD_OOB_PLACE: |
| 2088 | case MTD_OOB_AUTO: |
| 2089 | case MTD_OOB_RAW: |
| 2090 | break; |
| 2091 | |
| 2092 | default: |
| 2093 | goto out; |
| 2094 | } |
| 2095 | |
| 2096 | if (!ops->datbuf) |
| 2097 | ret = nand_do_write_oob(mtd, to, ops); |
| 2098 | else |
| 2099 | ret = nand_do_write_ops(mtd, to, ops); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2100 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2101 | out: |
| 2102 | nand_release_device(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2103 | return ret; |
| 2104 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2105 | |
| 2106 | /** |
| 2107 | * single_erease_cmd - [GENERIC] NAND standard block erase command function |
| 2108 | * @mtd: MTD device structure |
| 2109 | * @page: the page address of the block which will be erased |
| 2110 | * |
| 2111 | * Standard erase command for NAND chips |
| 2112 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2113 | static void single_erase_cmd(struct mtd_info *mtd, int page) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2114 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2115 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2116 | /* Send commands to erase a block */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2117 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); |
| 2118 | chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2119 | } |
| 2120 | |
| 2121 | /** |
| 2122 | * multi_erease_cmd - [GENERIC] AND specific block erase command function |
| 2123 | * @mtd: MTD device structure |
| 2124 | * @page: the page address of the block which will be erased |
| 2125 | * |
| 2126 | * AND multi block erase command function |
| 2127 | * Erase 4 consecutive blocks |
| 2128 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2129 | static void multi_erase_cmd(struct mtd_info *mtd, int page) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2130 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2131 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2132 | /* Send commands to erase a block */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2133 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
| 2134 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
| 2135 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page++); |
| 2136 | chip->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page); |
| 2137 | chip->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2138 | } |
| 2139 | |
| 2140 | /** |
| 2141 | * nand_erase - [MTD Interface] erase block(s) |
| 2142 | * @mtd: MTD device structure |
| 2143 | * @instr: erase instruction |
| 2144 | * |
| 2145 | * Erase one ore more blocks |
| 2146 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2147 | static int nand_erase(struct mtd_info *mtd, struct erase_info *instr) |
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 | return nand_erase_nand(mtd, instr, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2150 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2151 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2152 | #define BBT_PAGE_MASK 0xffffff3f |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2153 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2154 | * nand_erase_nand - [Internal] erase block(s) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2155 | * @mtd: MTD device structure |
| 2156 | * @instr: erase instruction |
| 2157 | * @allowbbt: allow erasing the bbt area |
| 2158 | * |
| 2159 | * Erase one ore more blocks |
| 2160 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2161 | int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, |
| 2162 | int allowbbt) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2163 | { |
| 2164 | int page, len, status, pages_per_block, ret, chipnr; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2165 | struct nand_chip *chip = mtd->priv; |
Wolfgang Grandegger | 0302550 | 2009-01-16 18:55:54 +0100 | [diff] [blame] | 2166 | int rewrite_bbt[CONFIG_SYS_NAND_MAX_CHIPS]={0}; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2167 | unsigned int bbt_masked_page = 0xffffffff; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2168 | |
Scott Wood | df83c47 | 2008-06-20 12:38:57 -0500 | [diff] [blame] | 2169 | MTDDEBUG (MTD_DEBUG_LEVEL3, "nand_erase: start = 0x%08x, len = %i\n", |
| 2170 | (unsigned int) instr->addr, (unsigned int) instr->len); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2171 | |
| 2172 | /* Start address must align on block boundary */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2173 | if (instr->addr & ((1 << chip->phys_erase_shift) - 1)) { |
Scott Wood | df83c47 | 2008-06-20 12:38:57 -0500 | [diff] [blame] | 2174 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_erase: Unaligned address\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2175 | return -EINVAL; |
| 2176 | } |
| 2177 | |
| 2178 | /* Length must align on block boundary */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2179 | if (instr->len & ((1 << chip->phys_erase_shift) - 1)) { |
Scott Wood | df83c47 | 2008-06-20 12:38:57 -0500 | [diff] [blame] | 2180 | MTDDEBUG (MTD_DEBUG_LEVEL0, |
| 2181 | "nand_erase: Length not block aligned\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2182 | return -EINVAL; |
| 2183 | } |
| 2184 | |
| 2185 | /* Do not allow erase past end of device */ |
| 2186 | if ((instr->len + instr->addr) > mtd->size) { |
Scott Wood | df83c47 | 2008-06-20 12:38:57 -0500 | [diff] [blame] | 2187 | MTDDEBUG (MTD_DEBUG_LEVEL0, |
| 2188 | "nand_erase: Erase past end of device\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2189 | return -EINVAL; |
| 2190 | } |
| 2191 | |
| 2192 | instr->fail_addr = 0xffffffff; |
| 2193 | |
| 2194 | /* Grab the lock and see if the device is available */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2195 | nand_get_device(chip, mtd, FL_ERASING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2196 | |
| 2197 | /* Shift to get first page */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2198 | page = (int)(instr->addr >> chip->page_shift); |
| 2199 | chipnr = (int)(instr->addr >> chip->chip_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2200 | |
| 2201 | /* Calculate pages in each block */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2202 | pages_per_block = 1 << (chip->phys_erase_shift - chip->page_shift); |
William Juul | b76ec38 | 2007-11-08 10:39:53 +0100 | [diff] [blame] | 2203 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2204 | /* Select the NAND device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2205 | chip->select_chip(mtd, chipnr); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2206 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2207 | /* Check, if it is write protected */ |
| 2208 | if (nand_check_wp(mtd)) { |
Scott Wood | df83c47 | 2008-06-20 12:38:57 -0500 | [diff] [blame] | 2209 | MTDDEBUG (MTD_DEBUG_LEVEL0, |
| 2210 | "nand_erase: Device is write protected!!!\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2211 | instr->state = MTD_ERASE_FAILED; |
| 2212 | goto erase_exit; |
| 2213 | } |
| 2214 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2215 | /* |
| 2216 | * If BBT requires refresh, set the BBT page mask to see if the BBT |
| 2217 | * should be rewritten. Otherwise the mask is set to 0xffffffff which |
| 2218 | * can not be matched. This is also done when the bbt is actually |
| 2219 | * erased to avoid recusrsive updates |
| 2220 | */ |
| 2221 | if (chip->options & BBT_AUTO_REFRESH && !allowbbt) |
| 2222 | bbt_masked_page = chip->bbt_td->pages[chipnr] & BBT_PAGE_MASK; |
| 2223 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2224 | /* Loop through the pages */ |
| 2225 | len = instr->len; |
| 2226 | |
| 2227 | instr->state = MTD_ERASING; |
| 2228 | |
| 2229 | while (len) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2230 | /* |
| 2231 | * heck if we have a bad block, we do not erase bad blocks ! |
| 2232 | */ |
| 2233 | if (nand_block_checkbad(mtd, ((loff_t) page) << |
| 2234 | chip->page_shift, 0, allowbbt)) { |
| 2235 | printk(KERN_WARNING "nand_erase: attempt to erase a " |
| 2236 | "bad block at page 0x%08x\n", page); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2237 | instr->state = MTD_ERASE_FAILED; |
| 2238 | goto erase_exit; |
| 2239 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2240 | |
| 2241 | /* |
| 2242 | * Invalidate the page cache, if we erase the block which |
| 2243 | * contains the current cached page |
| 2244 | */ |
| 2245 | if (page <= chip->pagebuf && chip->pagebuf < |
| 2246 | (page + pages_per_block)) |
| 2247 | chip->pagebuf = -1; |
| 2248 | |
| 2249 | chip->erase_cmd(mtd, page & chip->pagemask); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2250 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2251 | status = chip->waitfunc(mtd, chip); |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2252 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2253 | /* |
| 2254 | * See if operation failed and additional status checks are |
| 2255 | * available |
| 2256 | */ |
| 2257 | if ((status & NAND_STATUS_FAIL) && (chip->errstat)) |
| 2258 | status = chip->errstat(mtd, chip, FL_ERASING, |
| 2259 | status, page); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2260 | |
| 2261 | /* See if block erase succeeded */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2262 | if (status & NAND_STATUS_FAIL) { |
Scott Wood | df83c47 | 2008-06-20 12:38:57 -0500 | [diff] [blame] | 2263 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_erase: " |
| 2264 | "Failed erase, page 0x%08x\n", page); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2265 | instr->state = MTD_ERASE_FAILED; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2266 | instr->fail_addr = (page << chip->page_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2267 | goto erase_exit; |
| 2268 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2269 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2270 | /* |
| 2271 | * If BBT requires refresh, set the BBT rewrite flag to the |
| 2272 | * page being erased |
| 2273 | */ |
| 2274 | if (bbt_masked_page != 0xffffffff && |
| 2275 | (page & BBT_PAGE_MASK) == bbt_masked_page) |
| 2276 | rewrite_bbt[chipnr] = (page << chip->page_shift); |
| 2277 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2278 | /* Increment page address and decrement length */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2279 | len -= (1 << chip->phys_erase_shift); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2280 | page += pages_per_block; |
| 2281 | |
| 2282 | /* Check, if we cross a chip boundary */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2283 | if (len && !(page & chip->pagemask)) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2284 | chipnr++; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2285 | chip->select_chip(mtd, -1); |
| 2286 | chip->select_chip(mtd, chipnr); |
| 2287 | |
| 2288 | /* |
| 2289 | * If BBT requires refresh and BBT-PERCHIP, set the BBT |
| 2290 | * page mask to see if this BBT should be rewritten |
| 2291 | */ |
| 2292 | if (bbt_masked_page != 0xffffffff && |
| 2293 | (chip->bbt_td->options & NAND_BBT_PERCHIP)) |
| 2294 | bbt_masked_page = chip->bbt_td->pages[chipnr] & |
| 2295 | BBT_PAGE_MASK; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2296 | } |
| 2297 | } |
| 2298 | instr->state = MTD_ERASE_DONE; |
| 2299 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2300 | erase_exit: |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2301 | |
| 2302 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2303 | |
| 2304 | /* Deselect and wake up anyone waiting on the device */ |
| 2305 | nand_release_device(mtd); |
| 2306 | |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2307 | /* Do call back function */ |
| 2308 | if (!ret) |
| 2309 | mtd_erase_callback(instr); |
| 2310 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2311 | /* |
| 2312 | * If BBT requires refresh and erase was successful, rewrite any |
| 2313 | * selected bad block tables |
| 2314 | */ |
| 2315 | if (bbt_masked_page == 0xffffffff || ret) |
| 2316 | return ret; |
| 2317 | |
| 2318 | for (chipnr = 0; chipnr < chip->numchips; chipnr++) { |
| 2319 | if (!rewrite_bbt[chipnr]) |
| 2320 | continue; |
| 2321 | /* update the BBT for chip */ |
| 2322 | MTDDEBUG (MTD_DEBUG_LEVEL0, "nand_erase_nand: nand_update_bbt " |
| 2323 | "(%d:0x%0x 0x%0x)\n", chipnr, rewrite_bbt[chipnr], |
| 2324 | chip->bbt_td->pages[chipnr]); |
| 2325 | nand_update_bbt(mtd, rewrite_bbt[chipnr]); |
| 2326 | } |
| 2327 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2328 | /* Return more or less happy */ |
| 2329 | return ret; |
| 2330 | } |
| 2331 | |
| 2332 | /** |
| 2333 | * nand_sync - [MTD Interface] sync |
| 2334 | * @mtd: MTD device structure |
| 2335 | * |
| 2336 | * Sync is actually a wait for chip ready function |
| 2337 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2338 | static void nand_sync(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2339 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2340 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2341 | |
Scott Wood | df83c47 | 2008-06-20 12:38:57 -0500 | [diff] [blame] | 2342 | MTDDEBUG (MTD_DEBUG_LEVEL3, "nand_sync: called\n"); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2343 | |
| 2344 | /* Grab the lock and see if the device is available */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2345 | nand_get_device(chip, mtd, FL_SYNCING); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2346 | /* Release it and go back */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2347 | nand_release_device(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2348 | } |
| 2349 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2350 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2351 | * nand_block_isbad - [MTD Interface] Check if block at offset is bad |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2352 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2353 | * @offs: offset relative to mtd start |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2354 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2355 | static int nand_block_isbad(struct mtd_info *mtd, loff_t offs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2356 | { |
| 2357 | /* Check for invalid offset */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2358 | if (offs > mtd->size) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2359 | return -EINVAL; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2360 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2361 | return nand_block_checkbad(mtd, offs, 1, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2362 | } |
| 2363 | |
| 2364 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2365 | * 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] | 2366 | * @mtd: MTD device structure |
| 2367 | * @ofs: offset relative to mtd start |
| 2368 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2369 | static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2370 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2371 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2372 | int ret; |
| 2373 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2374 | if ((ret = nand_block_isbad(mtd, ofs))) { |
| 2375 | /* If it was bad already, return success and do nothing. */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2376 | if (ret > 0) |
| 2377 | return 0; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2378 | return ret; |
| 2379 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2380 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2381 | return chip->block_markbad(mtd, ofs); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2382 | } |
| 2383 | |
| 2384 | /** |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2385 | * nand_suspend - [MTD Interface] Suspend the NAND flash |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2386 | * @mtd: MTD device structure |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2387 | */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2388 | static int nand_suspend(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2389 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2390 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2391 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2392 | return nand_get_device(chip, mtd, FL_PM_SUSPENDED); |
| 2393 | } |
| 2394 | |
| 2395 | /** |
| 2396 | * nand_resume - [MTD Interface] Resume the NAND flash |
| 2397 | * @mtd: MTD device structure |
| 2398 | */ |
| 2399 | static void nand_resume(struct mtd_info *mtd) |
| 2400 | { |
| 2401 | struct nand_chip *chip = mtd->priv; |
| 2402 | |
| 2403 | if (chip->state == FL_PM_SUSPENDED) |
| 2404 | nand_release_device(mtd); |
| 2405 | else |
| 2406 | printk(KERN_ERR "nand_resume() called for a chip which is not " |
| 2407 | "in suspended state\n"); |
| 2408 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2409 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2410 | /* |
| 2411 | * Set default functions |
| 2412 | */ |
| 2413 | static void nand_set_defaults(struct nand_chip *chip, int busw) |
| 2414 | { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2415 | /* check for proper chip_delay setup, set 20us if not */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2416 | if (!chip->chip_delay) |
| 2417 | chip->chip_delay = 20; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2418 | |
| 2419 | /* check, if a user supplied command function given */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2420 | if (chip->cmdfunc == NULL) |
| 2421 | chip->cmdfunc = nand_command; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2422 | |
| 2423 | /* check, if a user supplied wait function given */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2424 | if (chip->waitfunc == NULL) |
| 2425 | chip->waitfunc = nand_wait; |
| 2426 | |
| 2427 | if (!chip->select_chip) |
| 2428 | chip->select_chip = nand_select_chip; |
| 2429 | if (!chip->read_byte) |
| 2430 | chip->read_byte = busw ? nand_read_byte16 : nand_read_byte; |
| 2431 | if (!chip->read_word) |
| 2432 | chip->read_word = nand_read_word; |
| 2433 | if (!chip->block_bad) |
| 2434 | chip->block_bad = nand_block_bad; |
| 2435 | if (!chip->block_markbad) |
| 2436 | chip->block_markbad = nand_default_block_markbad; |
| 2437 | if (!chip->write_buf) |
| 2438 | chip->write_buf = busw ? nand_write_buf16 : nand_write_buf; |
| 2439 | if (!chip->read_buf) |
| 2440 | chip->read_buf = busw ? nand_read_buf16 : nand_read_buf; |
| 2441 | if (!chip->verify_buf) |
| 2442 | chip->verify_buf = busw ? nand_verify_buf16 : nand_verify_buf; |
| 2443 | if (!chip->scan_bbt) |
| 2444 | chip->scan_bbt = nand_default_bbt; |
| 2445 | |
| 2446 | if (!chip->controller) { |
| 2447 | chip->controller = &chip->hwcontrol; |
| 2448 | |
| 2449 | /* XXX U-BOOT XXX */ |
| 2450 | #if 0 |
| 2451 | spin_lock_init(&chip->controller->lock); |
| 2452 | init_waitqueue_head(&chip->controller->wq); |
| 2453 | #endif |
| 2454 | } |
| 2455 | |
| 2456 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2457 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2458 | /* |
| 2459 | * Get the flash and manufacturer id and lookup if the type is supported |
| 2460 | */ |
| 2461 | static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, |
| 2462 | struct nand_chip *chip, |
| 2463 | int busw, int *maf_id) |
| 2464 | { |
| 2465 | struct nand_flash_dev *type = NULL; |
| 2466 | int i, dev_id, maf_idx; |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2467 | int tmp_id, tmp_manf; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2468 | |
| 2469 | /* Select the device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2470 | chip->select_chip(mtd, 0); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2471 | |
Karl Beldan | b6322fc | 2008-09-15 16:08:03 +0200 | [diff] [blame] | 2472 | /* |
| 2473 | * Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx) |
| 2474 | * after power-up |
| 2475 | */ |
| 2476 | chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); |
| 2477 | |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2478 | /* Send the command for reading device ID */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2479 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2480 | |
| 2481 | /* Read manufacturer and device IDs */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2482 | *maf_id = chip->read_byte(mtd); |
| 2483 | dev_id = chip->read_byte(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2484 | |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2485 | /* Try again to make sure, as some systems the bus-hold or other |
| 2486 | * interface concerns can cause random data which looks like a |
| 2487 | * possibly credible NAND flash to appear. If the two results do |
| 2488 | * not match, ignore the device completely. |
| 2489 | */ |
| 2490 | |
| 2491 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
| 2492 | |
| 2493 | /* Read manufacturer and device IDs */ |
| 2494 | |
| 2495 | tmp_manf = chip->read_byte(mtd); |
| 2496 | tmp_id = chip->read_byte(mtd); |
| 2497 | |
| 2498 | if (tmp_manf != *maf_id || tmp_id != dev_id) { |
| 2499 | printk(KERN_INFO "%s: second ID read did not match " |
| 2500 | "%02x,%02x against %02x,%02x\n", __func__, |
| 2501 | *maf_id, dev_id, tmp_manf, tmp_id); |
| 2502 | return ERR_PTR(-ENODEV); |
| 2503 | } |
| 2504 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2505 | /* Lookup the flash id */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2506 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2507 | if (dev_id == nand_flash_ids[i].id) { |
| 2508 | type = &nand_flash_ids[i]; |
| 2509 | break; |
| 2510 | } |
| 2511 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2512 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2513 | if (!type) |
| 2514 | return ERR_PTR(-ENODEV); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2515 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2516 | if (!mtd->name) |
| 2517 | mtd->name = type->name; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2518 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2519 | chip->chipsize = type->chipsize << 20; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2520 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2521 | /* Newer devices have all the information in additional id bytes */ |
| 2522 | if (!type->pagesize) { |
| 2523 | int extid; |
| 2524 | /* The 3rd id byte holds MLC / multichip data */ |
| 2525 | chip->cellinfo = chip->read_byte(mtd); |
| 2526 | /* The 4th id byte is the important one */ |
| 2527 | extid = chip->read_byte(mtd); |
| 2528 | /* Calc pagesize */ |
| 2529 | mtd->writesize = 1024 << (extid & 0x3); |
| 2530 | extid >>= 2; |
| 2531 | /* Calc oobsize */ |
| 2532 | mtd->oobsize = (8 << (extid & 0x01)) * (mtd->writesize >> 9); |
| 2533 | extid >>= 2; |
| 2534 | /* Calc blocksize. Blocksize is multiples of 64KiB */ |
| 2535 | mtd->erasesize = (64 * 1024) << (extid & 0x03); |
| 2536 | extid >>= 2; |
| 2537 | /* Get buswidth information */ |
| 2538 | busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2539 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2540 | } else { |
| 2541 | /* |
| 2542 | * Old devices have chip data hardcoded in the device id table |
| 2543 | */ |
| 2544 | mtd->erasesize = type->erasesize; |
| 2545 | mtd->writesize = type->pagesize; |
| 2546 | mtd->oobsize = mtd->writesize / 32; |
| 2547 | busw = type->options & NAND_BUSWIDTH_16; |
| 2548 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2549 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2550 | /* Try to identify manufacturer */ |
| 2551 | for (maf_idx = 0; nand_manuf_ids[maf_idx].id != 0x0; maf_idx++) { |
| 2552 | if (nand_manuf_ids[maf_idx].id == *maf_id) |
| 2553 | break; |
| 2554 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2555 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2556 | /* |
| 2557 | * Check, if buswidth is correct. Hardware drivers should set |
| 2558 | * chip correct ! |
| 2559 | */ |
| 2560 | if (busw != (chip->options & NAND_BUSWIDTH_16)) { |
| 2561 | printk(KERN_INFO "NAND device: Manufacturer ID:" |
| 2562 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, |
| 2563 | dev_id, nand_manuf_ids[maf_idx].name, mtd->name); |
| 2564 | printk(KERN_WARNING "NAND bus width %d instead %d bit\n", |
| 2565 | (chip->options & NAND_BUSWIDTH_16) ? 16 : 8, |
| 2566 | busw ? 16 : 8); |
| 2567 | return ERR_PTR(-EINVAL); |
| 2568 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2569 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2570 | /* Calculate the address shift from the page size */ |
| 2571 | chip->page_shift = ffs(mtd->writesize) - 1; |
| 2572 | /* Convert chipsize to number of pages per chip -1. */ |
| 2573 | chip->pagemask = (chip->chipsize >> chip->page_shift) - 1; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2574 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2575 | chip->bbt_erase_shift = chip->phys_erase_shift = |
| 2576 | ffs(mtd->erasesize) - 1; |
| 2577 | chip->chip_shift = ffs(chip->chipsize) - 1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2578 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2579 | /* Set the bad block position */ |
| 2580 | chip->badblockpos = mtd->writesize > 512 ? |
| 2581 | NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2582 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2583 | /* Get chip options, preserve non chip based options */ |
| 2584 | chip->options &= ~NAND_CHIPOPTIONS_MSK; |
| 2585 | chip->options |= type->options & NAND_CHIPOPTIONS_MSK; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2586 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2587 | /* |
| 2588 | * Set chip as a default. Board drivers can override it, if necessary |
| 2589 | */ |
| 2590 | chip->options |= NAND_NO_AUTOINCR; |
| 2591 | |
| 2592 | /* Check if chip is a not a samsung device. Do not clear the |
| 2593 | * options for chips which are not having an extended id. |
| 2594 | */ |
| 2595 | if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize) |
| 2596 | chip->options &= ~NAND_SAMSUNG_LP_OPTIONS; |
| 2597 | |
| 2598 | /* Check for AND chips with 4 page planes */ |
| 2599 | if (chip->options & NAND_4PAGE_ARRAY) |
| 2600 | chip->erase_cmd = multi_erase_cmd; |
| 2601 | else |
| 2602 | chip->erase_cmd = single_erase_cmd; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2603 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2604 | /* Do not replace user supplied command function ! */ |
| 2605 | if (mtd->writesize > 512 && chip->cmdfunc == nand_command) |
| 2606 | chip->cmdfunc = nand_command_lp; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2607 | |
Stefan Roese | 4fe7143 | 2008-01-10 18:47:33 +0100 | [diff] [blame] | 2608 | MTDDEBUG (MTD_DEBUG_LEVEL0, "NAND device: Manufacturer ID:" |
| 2609 | " 0x%02x, Chip ID: 0x%02x (%s %s)\n", *maf_id, dev_id, |
| 2610 | nand_manuf_ids[maf_idx].name, type->name); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2611 | |
| 2612 | return type; |
| 2613 | } |
| 2614 | |
| 2615 | /** |
| 2616 | * nand_scan_ident - [NAND Interface] Scan for the NAND device |
| 2617 | * @mtd: MTD device structure |
| 2618 | * @maxchips: Number of chips to scan for |
| 2619 | * |
| 2620 | * This is the first phase of the normal nand_scan() function. It |
| 2621 | * reads the flash ID and sets up MTD fields accordingly. |
| 2622 | * |
| 2623 | * The mtd->owner field must be set to the module of the caller. |
| 2624 | */ |
| 2625 | int nand_scan_ident(struct mtd_info *mtd, int maxchips) |
| 2626 | { |
| 2627 | int i, busw, nand_maf_id; |
| 2628 | struct nand_chip *chip = mtd->priv; |
| 2629 | struct nand_flash_dev *type; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2630 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2631 | /* Get buswidth to select the correct functions */ |
| 2632 | busw = chip->options & NAND_BUSWIDTH_16; |
| 2633 | /* Set the default functions */ |
| 2634 | nand_set_defaults(chip, busw); |
| 2635 | |
| 2636 | /* Read the flash type */ |
| 2637 | type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id); |
| 2638 | |
| 2639 | if (IS_ERR(type)) { |
Peter Tyser | f96047a | 2009-02-04 13:39:40 -0600 | [diff] [blame] | 2640 | #ifndef CONFIG_SYS_NAND_QUIET_TEST |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2641 | printk(KERN_WARNING "No NAND device found!!!\n"); |
Peter Tyser | f96047a | 2009-02-04 13:39:40 -0600 | [diff] [blame] | 2642 | #endif |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2643 | chip->select_chip(mtd, -1); |
| 2644 | return PTR_ERR(type); |
| 2645 | } |
| 2646 | |
| 2647 | /* Check for a chip array */ |
| 2648 | for (i = 1; i < maxchips; i++) { |
| 2649 | chip->select_chip(mtd, i); |
Karl Beldan | b6322fc | 2008-09-15 16:08:03 +0200 | [diff] [blame] | 2650 | /* See comment in nand_get_flash_type for reset */ |
| 2651 | chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2652 | /* Send the command for reading device ID */ |
| 2653 | chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2654 | /* Read manufacturer and device IDs */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2655 | if (nand_maf_id != chip->read_byte(mtd) || |
| 2656 | type->id != chip->read_byte(mtd)) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2657 | break; |
| 2658 | } |
Wolfgang Grandegger | b325d7e | 2009-02-11 18:38:20 +0100 | [diff] [blame] | 2659 | #ifdef DEBUG |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2660 | if (i > 1) |
| 2661 | printk(KERN_INFO "%d NAND chips detected\n", i); |
Wolfgang Grandegger | b325d7e | 2009-02-11 18:38:20 +0100 | [diff] [blame] | 2662 | #endif |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2663 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2664 | /* Store the number of chips and calc total size for mtd */ |
| 2665 | chip->numchips = i; |
| 2666 | mtd->size = i * chip->chipsize; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2667 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2668 | return 0; |
| 2669 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2670 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2671 | |
| 2672 | /** |
| 2673 | * nand_scan_tail - [NAND Interface] Scan for the NAND device |
| 2674 | * @mtd: MTD device structure |
| 2675 | * @maxchips: Number of chips to scan for |
| 2676 | * |
| 2677 | * This is the second phase of the normal nand_scan() function. It |
| 2678 | * fills out all the uninitialized function pointers with the defaults |
| 2679 | * and scans for a bad block table if appropriate. |
| 2680 | */ |
| 2681 | int nand_scan_tail(struct mtd_info *mtd) |
| 2682 | { |
| 2683 | int i; |
| 2684 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2685 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2686 | if (!(chip->options & NAND_OWN_BUFFERS)) |
| 2687 | chip->buffers = kmalloc(sizeof(*chip->buffers), GFP_KERNEL); |
| 2688 | if (!chip->buffers) |
| 2689 | return -ENOMEM; |
| 2690 | |
| 2691 | /* Set the internal oob buffer location, just after the page data */ |
| 2692 | chip->oob_poi = chip->buffers->databuf + mtd->writesize; |
| 2693 | |
| 2694 | /* |
| 2695 | * If no default placement scheme is given, select an appropriate one |
| 2696 | */ |
| 2697 | if (!chip->ecc.layout) { |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2698 | switch (mtd->oobsize) { |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2699 | case 8: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2700 | chip->ecc.layout = &nand_oob_8; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2701 | break; |
| 2702 | case 16: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2703 | chip->ecc.layout = &nand_oob_16; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2704 | break; |
| 2705 | case 64: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2706 | chip->ecc.layout = &nand_oob_64; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2707 | break; |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 2708 | case 128: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2709 | chip->ecc.layout = &nand_oob_128; |
Sergei Poselenov | 04fbaa0 | 2008-06-06 15:42:43 +0200 | [diff] [blame] | 2710 | break; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2711 | default: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2712 | printk(KERN_WARNING "No oob scheme defined for " |
| 2713 | "oobsize %d\n", mtd->oobsize); |
William Juul | 9e9c2c1 | 2007-11-09 13:32:30 +0100 | [diff] [blame] | 2714 | /* BUG(); */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2715 | } |
| 2716 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2717 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2718 | if (!chip->write_page) |
| 2719 | chip->write_page = nand_write_page; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2720 | |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2721 | /* |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2722 | * check ECC mode, default to software if 3byte/512byte hardware ECC is |
| 2723 | * selected and we have 256 byte pagesize fallback to software ECC |
| 2724 | */ |
| 2725 | if (!chip->ecc.read_page_raw) |
| 2726 | chip->ecc.read_page_raw = nand_read_page_raw; |
| 2727 | if (!chip->ecc.write_page_raw) |
| 2728 | chip->ecc.write_page_raw = nand_write_page_raw; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2729 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2730 | switch (chip->ecc.mode) { |
| 2731 | case NAND_ECC_HW: |
| 2732 | /* Use standard hwecc read page function ? */ |
| 2733 | if (!chip->ecc.read_page) |
| 2734 | chip->ecc.read_page = nand_read_page_hwecc; |
| 2735 | if (!chip->ecc.write_page) |
| 2736 | chip->ecc.write_page = nand_write_page_hwecc; |
| 2737 | if (!chip->ecc.read_oob) |
| 2738 | chip->ecc.read_oob = nand_read_oob_std; |
| 2739 | if (!chip->ecc.write_oob) |
| 2740 | chip->ecc.write_oob = nand_write_oob_std; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2741 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2742 | case NAND_ECC_HW_SYNDROME: |
Scott Wood | 5fd2c30 | 2008-03-18 15:29:14 -0500 | [diff] [blame] | 2743 | if ((!chip->ecc.calculate || !chip->ecc.correct || |
| 2744 | !chip->ecc.hwctl) && |
| 2745 | (!chip->ecc.read_page || |
| 2746 | chip->ecc.read_page == nand_read_page_hwecc || |
| 2747 | !chip->ecc.write_page || |
| 2748 | chip->ecc.write_page == nand_write_page_hwecc)) { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2749 | printk(KERN_WARNING "No ECC functions supplied, " |
| 2750 | "Hardware ECC not possible\n"); |
| 2751 | BUG(); |
| 2752 | } |
| 2753 | /* Use standard syndrome read/write page function ? */ |
| 2754 | if (!chip->ecc.read_page) |
| 2755 | chip->ecc.read_page = nand_read_page_syndrome; |
| 2756 | if (!chip->ecc.write_page) |
| 2757 | chip->ecc.write_page = nand_write_page_syndrome; |
| 2758 | if (!chip->ecc.read_oob) |
| 2759 | chip->ecc.read_oob = nand_read_oob_syndrome; |
| 2760 | if (!chip->ecc.write_oob) |
| 2761 | chip->ecc.write_oob = nand_write_oob_syndrome; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2762 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2763 | if (mtd->writesize >= chip->ecc.size) |
| 2764 | break; |
| 2765 | printk(KERN_WARNING "%d byte HW ECC not possible on " |
| 2766 | "%d byte page size, fallback to SW ECC\n", |
| 2767 | chip->ecc.size, mtd->writesize); |
| 2768 | chip->ecc.mode = NAND_ECC_SOFT; |
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 | case NAND_ECC_SOFT: |
| 2771 | chip->ecc.calculate = nand_calculate_ecc; |
| 2772 | chip->ecc.correct = nand_correct_data; |
| 2773 | chip->ecc.read_page = nand_read_page_swecc; |
Scott Wood | 3628f00 | 2008-10-24 16:20:43 -0500 | [diff] [blame] | 2774 | chip->ecc.read_subpage = nand_read_subpage; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2775 | chip->ecc.write_page = nand_write_page_swecc; |
| 2776 | chip->ecc.read_oob = nand_read_oob_std; |
| 2777 | chip->ecc.write_oob = nand_write_oob_std; |
| 2778 | chip->ecc.size = 256; |
| 2779 | chip->ecc.bytes = 3; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2780 | break; |
| 2781 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2782 | case NAND_ECC_NONE: |
| 2783 | printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " |
| 2784 | "This is not recommended !!\n"); |
| 2785 | chip->ecc.read_page = nand_read_page_raw; |
| 2786 | chip->ecc.write_page = nand_write_page_raw; |
| 2787 | chip->ecc.read_oob = nand_read_oob_std; |
| 2788 | chip->ecc.write_oob = nand_write_oob_std; |
| 2789 | chip->ecc.size = mtd->writesize; |
| 2790 | chip->ecc.bytes = 0; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2791 | break; |
| 2792 | |
| 2793 | default: |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2794 | printk(KERN_WARNING "Invalid NAND_ECC_MODE %d\n", |
| 2795 | chip->ecc.mode); |
| 2796 | BUG(); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2797 | } |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2798 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2799 | /* |
| 2800 | * The number of bytes available for a client to place data into |
| 2801 | * the out of band area |
| 2802 | */ |
| 2803 | chip->ecc.layout->oobavail = 0; |
| 2804 | for (i = 0; chip->ecc.layout->oobfree[i].length; i++) |
| 2805 | chip->ecc.layout->oobavail += |
| 2806 | chip->ecc.layout->oobfree[i].length; |
| 2807 | mtd->oobavail = chip->ecc.layout->oobavail; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2808 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2809 | /* |
| 2810 | * Set the number of read / write steps for one page depending on ECC |
| 2811 | * mode |
| 2812 | */ |
| 2813 | chip->ecc.steps = mtd->writesize / chip->ecc.size; |
| 2814 | if(chip->ecc.steps * chip->ecc.size != mtd->writesize) { |
| 2815 | printk(KERN_WARNING "Invalid ecc parameters\n"); |
| 2816 | BUG(); |
| 2817 | } |
| 2818 | chip->ecc.total = chip->ecc.steps * chip->ecc.bytes; |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2819 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2820 | /* |
| 2821 | * Allow subpage writes up to ecc.steps. Not possible for MLC |
| 2822 | * FLASH. |
| 2823 | */ |
| 2824 | if (!(chip->options & NAND_NO_SUBPAGE_WRITE) && |
| 2825 | !(chip->cellinfo & NAND_CI_CELLTYPE_MSK)) { |
| 2826 | switch(chip->ecc.steps) { |
| 2827 | case 2: |
| 2828 | mtd->subpage_sft = 1; |
| 2829 | break; |
| 2830 | case 4: |
| 2831 | case 8: |
| 2832 | mtd->subpage_sft = 2; |
| 2833 | break; |
| 2834 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2835 | } |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2836 | chip->subpagesize = mtd->writesize >> mtd->subpage_sft; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2837 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2838 | /* Initialize state */ |
| 2839 | chip->state = FL_READY; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2840 | |
| 2841 | /* De-select the device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2842 | chip->select_chip(mtd, -1); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2843 | |
| 2844 | /* Invalidate the pagebuffer reference */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2845 | chip->pagebuf = -1; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2846 | |
| 2847 | /* Fill in remaining MTD driver data */ |
| 2848 | mtd->type = MTD_NANDFLASH; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2849 | mtd->flags = MTD_CAP_NANDFLASH; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2850 | mtd->erase = nand_erase; |
| 2851 | mtd->point = NULL; |
| 2852 | mtd->unpoint = NULL; |
| 2853 | mtd->read = nand_read; |
| 2854 | mtd->write = nand_write; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2855 | mtd->read_oob = nand_read_oob; |
| 2856 | mtd->write_oob = nand_write_oob; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2857 | mtd->sync = nand_sync; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2858 | mtd->lock = NULL; |
| 2859 | mtd->unlock = NULL; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2860 | mtd->suspend = nand_suspend; |
| 2861 | mtd->resume = nand_resume; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2862 | mtd->block_isbad = nand_block_isbad; |
| 2863 | mtd->block_markbad = nand_block_markbad; |
| 2864 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2865 | /* propagate ecc.layout to mtd_info */ |
| 2866 | mtd->ecclayout = chip->ecc.layout; |
| 2867 | |
| 2868 | /* Check, if we should skip the bad block table scan */ |
| 2869 | if (chip->options & NAND_SKIP_BBTSCAN) |
Ilya Yanok | a2d4dfe | 2008-06-30 15:34:40 +0200 | [diff] [blame] | 2870 | chip->options |= NAND_BBT_SCANNED; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2871 | |
Ilya Yanok | a2d4dfe | 2008-06-30 15:34:40 +0200 | [diff] [blame] | 2872 | return 0; |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2873 | } |
| 2874 | |
| 2875 | /* module_text_address() isn't exported, and it's mostly a pointless |
| 2876 | test if this is a module _anyway_ -- they'd have to try _really_ hard |
| 2877 | to call us from in-kernel code if the core NAND support is modular. */ |
| 2878 | #ifdef MODULE |
| 2879 | #define caller_is_module() (1) |
| 2880 | #else |
| 2881 | #define caller_is_module() \ |
| 2882 | module_text_address((unsigned long)__builtin_return_address(0)) |
| 2883 | #endif |
| 2884 | |
| 2885 | /** |
| 2886 | * nand_scan - [NAND Interface] Scan for the NAND device |
| 2887 | * @mtd: MTD device structure |
| 2888 | * @maxchips: Number of chips to scan for |
| 2889 | * |
| 2890 | * This fills out all the uninitialized function pointers |
| 2891 | * with the defaults. |
| 2892 | * The flash ID is read and the mtd/chip structures are |
| 2893 | * filled with the appropriate values. |
| 2894 | * The mtd->owner field must be set to the module of the caller |
| 2895 | * |
| 2896 | */ |
| 2897 | int nand_scan(struct mtd_info *mtd, int maxchips) |
| 2898 | { |
| 2899 | int ret; |
| 2900 | |
| 2901 | /* Many callers got this wrong, so check for it for a while... */ |
| 2902 | /* XXX U-BOOT XXX */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2903 | #if 0 |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2904 | if (!mtd->owner && caller_is_module()) { |
| 2905 | printk(KERN_CRIT "nand_scan() called with NULL mtd->owner!\n"); |
| 2906 | BUG(); |
| 2907 | } |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2908 | #endif |
William Juul | b76ec38 | 2007-11-08 10:39:53 +0100 | [diff] [blame] | 2909 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2910 | ret = nand_scan_ident(mtd, maxchips); |
| 2911 | if (!ret) |
| 2912 | ret = nand_scan_tail(mtd); |
| 2913 | return ret; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2914 | } |
| 2915 | |
| 2916 | /** |
Wolfgang Denk | 7b9bc3a | 2005-09-14 23:53:32 +0200 | [diff] [blame] | 2917 | * nand_release - [NAND Interface] Free resources held by the NAND device |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2918 | * @mtd: MTD device structure |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2919 | */ |
| 2920 | void nand_release(struct mtd_info *mtd) |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2921 | { |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2922 | struct nand_chip *chip = mtd->priv; |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2923 | |
| 2924 | #ifdef CONFIG_MTD_PARTITIONS |
| 2925 | /* Deregister partitions */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2926 | del_mtd_partitions(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2927 | #endif |
| 2928 | /* Deregister the device */ |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2929 | /* XXX U-BOOT XXX */ |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2930 | #if 0 |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2931 | del_mtd_device(mtd); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2932 | #endif |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2933 | |
| 2934 | /* Free bad block table memory */ |
| 2935 | kfree(chip->bbt); |
| 2936 | if (!(chip->options & NAND_OWN_BUFFERS)) |
| 2937 | kfree(chip->buffers); |
| 2938 | } |
| 2939 | |
| 2940 | /* XXX U-BOOT XXX */ |
| 2941 | #if 0 |
| 2942 | EXPORT_SYMBOL_GPL(nand_scan); |
| 2943 | EXPORT_SYMBOL_GPL(nand_scan_ident); |
| 2944 | EXPORT_SYMBOL_GPL(nand_scan_tail); |
| 2945 | EXPORT_SYMBOL_GPL(nand_release); |
| 2946 | |
| 2947 | static int __init nand_base_init(void) |
| 2948 | { |
| 2949 | led_trigger_register_simple("nand-disk", &nand_led_trigger); |
| 2950 | return 0; |
| 2951 | } |
| 2952 | |
| 2953 | static void __exit nand_base_exit(void) |
| 2954 | { |
| 2955 | led_trigger_unregister_simple(nand_led_trigger); |
Wolfgang Denk | 2f9b7e4 | 2005-08-17 12:55:25 +0200 | [diff] [blame] | 2956 | } |
| 2957 | |
William Juul | 52c0796 | 2007-10-31 13:53:06 +0100 | [diff] [blame] | 2958 | module_init(nand_base_init); |
| 2959 | module_exit(nand_base_exit); |
| 2960 | |
| 2961 | MODULE_LICENSE("GPL"); |
| 2962 | MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>"); |
| 2963 | MODULE_DESCRIPTION("Generic NAND flash driver code"); |
| 2964 | #endif |