Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mtd/onenand/onenand_base.c |
| 3 | * |
| 4 | * Copyright (C) 2005 Samsung Electronics |
| 5 | * Kyungmin Park <kyungmin.park@samsung.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
Andrew Morton | 015953d | 2005-11-08 21:34:28 -0800 | [diff] [blame] | 15 | #include <linux/sched.h> |
| 16 | #include <linux/jiffies.h> |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 17 | #include <linux/mtd/mtd.h> |
| 18 | #include <linux/mtd/onenand.h> |
| 19 | #include <linux/mtd/partitions.h> |
| 20 | |
| 21 | #include <asm/io.h> |
| 22 | |
| 23 | /** |
| 24 | * onenand_oob_64 - oob info for large (2KB) page |
| 25 | */ |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 26 | static struct nand_ecclayout onenand_oob_64 = { |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 27 | .eccbytes = 20, |
| 28 | .eccpos = { |
| 29 | 8, 9, 10, 11, 12, |
| 30 | 24, 25, 26, 27, 28, |
| 31 | 40, 41, 42, 43, 44, |
| 32 | 56, 57, 58, 59, 60, |
| 33 | }, |
| 34 | .oobfree = { |
| 35 | {2, 3}, {14, 2}, {18, 3}, {30, 2}, |
Jarkko Lavinen | d9777f1 | 2006-05-12 17:02:35 +0300 | [diff] [blame] | 36 | {34, 3}, {46, 2}, {50, 3}, {62, 2} |
| 37 | } |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 38 | }; |
| 39 | |
| 40 | /** |
| 41 | * onenand_oob_32 - oob info for middle (1KB) page |
| 42 | */ |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 43 | static struct nand_ecclayout onenand_oob_32 = { |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 44 | .eccbytes = 10, |
| 45 | .eccpos = { |
| 46 | 8, 9, 10, 11, 12, |
| 47 | 24, 25, 26, 27, 28, |
| 48 | }, |
| 49 | .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} } |
| 50 | }; |
| 51 | |
| 52 | static const unsigned char ffchars[] = { |
| 53 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 54 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */ |
| 55 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 56 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */ |
| 57 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 58 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */ |
| 59 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 60 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */ |
| 61 | }; |
| 62 | |
| 63 | /** |
| 64 | * onenand_readw - [OneNAND Interface] Read OneNAND register |
| 65 | * @param addr address to read |
| 66 | * |
| 67 | * Read OneNAND register |
| 68 | */ |
| 69 | static unsigned short onenand_readw(void __iomem *addr) |
| 70 | { |
| 71 | return readw(addr); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * onenand_writew - [OneNAND Interface] Write OneNAND register with value |
| 76 | * @param value value to write |
| 77 | * @param addr address to write |
| 78 | * |
| 79 | * Write OneNAND register with value |
| 80 | */ |
| 81 | static void onenand_writew(unsigned short value, void __iomem *addr) |
| 82 | { |
| 83 | writew(value, addr); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * onenand_block_address - [DEFAULT] Get block address |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 88 | * @param this onenand chip data structure |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 89 | * @param block the block |
| 90 | * @return translated block address if DDP, otherwise same |
| 91 | * |
| 92 | * Setup Start Address 1 Register (F100h) |
| 93 | */ |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 94 | static int onenand_block_address(struct onenand_chip *this, int block) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 95 | { |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 96 | if (this->device_id & ONENAND_DEVICE_IS_DDP) { |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 97 | /* Device Flash Core select, NAND Flash Block Address */ |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 98 | int dfs = 0; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 99 | |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 100 | if (block & this->density_mask) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 101 | dfs = 1; |
| 102 | |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 103 | return (dfs << ONENAND_DDP_SHIFT) | |
| 104 | (block & (this->density_mask - 1)); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | return block; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * onenand_bufferram_address - [DEFAULT] Get bufferram address |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 112 | * @param this onenand chip data structure |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 113 | * @param block the block |
| 114 | * @return set DBS value if DDP, otherwise 0 |
| 115 | * |
| 116 | * Setup Start Address 2 Register (F101h) for DDP |
| 117 | */ |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 118 | static int onenand_bufferram_address(struct onenand_chip *this, int block) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 119 | { |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 120 | if (this->device_id & ONENAND_DEVICE_IS_DDP) { |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 121 | /* Device BufferRAM Select */ |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 122 | int dbs = 0; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 123 | |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 124 | if (block & this->density_mask) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 125 | dbs = 1; |
| 126 | |
| 127 | return (dbs << ONENAND_DDP_SHIFT); |
| 128 | } |
| 129 | |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * onenand_page_address - [DEFAULT] Get page address |
| 135 | * @param page the page address |
| 136 | * @param sector the sector address |
| 137 | * @return combined page and sector address |
| 138 | * |
| 139 | * Setup Start Address 8 Register (F107h) |
| 140 | */ |
| 141 | static int onenand_page_address(int page, int sector) |
| 142 | { |
| 143 | /* Flash Page Address, Flash Sector Address */ |
| 144 | int fpa, fsa; |
| 145 | |
| 146 | fpa = page & ONENAND_FPA_MASK; |
| 147 | fsa = sector & ONENAND_FSA_MASK; |
| 148 | |
| 149 | return ((fpa << ONENAND_FPA_SHIFT) | fsa); |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * onenand_buffer_address - [DEFAULT] Get buffer address |
| 154 | * @param dataram1 DataRAM index |
| 155 | * @param sectors the sector address |
| 156 | * @param count the number of sectors |
| 157 | * @return the start buffer value |
| 158 | * |
| 159 | * Setup Start Buffer Register (F200h) |
| 160 | */ |
| 161 | static int onenand_buffer_address(int dataram1, int sectors, int count) |
| 162 | { |
| 163 | int bsa, bsc; |
| 164 | |
| 165 | /* BufferRAM Sector Address */ |
| 166 | bsa = sectors & ONENAND_BSA_MASK; |
| 167 | |
| 168 | if (dataram1) |
| 169 | bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */ |
| 170 | else |
| 171 | bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */ |
| 172 | |
| 173 | /* BufferRAM Sector Count */ |
| 174 | bsc = count & ONENAND_BSC_MASK; |
| 175 | |
| 176 | return ((bsa << ONENAND_BSA_SHIFT) | bsc); |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * onenand_command - [DEFAULT] Send command to OneNAND device |
| 181 | * @param mtd MTD device structure |
| 182 | * @param cmd the command to be sent |
| 183 | * @param addr offset to read from or write to |
| 184 | * @param len number of bytes to read or write |
| 185 | * |
| 186 | * Send command to OneNAND device. This function is used for middle/large page |
| 187 | * devices (1KB/2KB Bytes per page) |
| 188 | */ |
| 189 | static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len) |
| 190 | { |
| 191 | struct onenand_chip *this = mtd->priv; |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 192 | int value, readcmd = 0, block_cmd = 0; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 193 | int block, page; |
| 194 | /* Now we use page size operation */ |
| 195 | int sectors = 4, count = 4; |
| 196 | |
| 197 | /* Address translation */ |
| 198 | switch (cmd) { |
| 199 | case ONENAND_CMD_UNLOCK: |
| 200 | case ONENAND_CMD_LOCK: |
| 201 | case ONENAND_CMD_LOCK_TIGHT: |
| 202 | block = -1; |
| 203 | page = -1; |
| 204 | break; |
| 205 | |
| 206 | case ONENAND_CMD_ERASE: |
| 207 | case ONENAND_CMD_BUFFERRAM: |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 208 | case ONENAND_CMD_OTP_ACCESS: |
| 209 | block_cmd = 1; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 210 | block = (int) (addr >> this->erase_shift); |
| 211 | page = -1; |
| 212 | break; |
| 213 | |
| 214 | default: |
| 215 | block = (int) (addr >> this->erase_shift); |
| 216 | page = (int) (addr >> this->page_shift); |
| 217 | page &= this->page_mask; |
| 218 | break; |
| 219 | } |
| 220 | |
| 221 | /* NOTE: The setting order of the registers is very important! */ |
| 222 | if (cmd == ONENAND_CMD_BUFFERRAM) { |
| 223 | /* Select DataRAM for DDP */ |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 224 | value = onenand_bufferram_address(this, block); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 225 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); |
| 226 | |
| 227 | /* Switch to the next data buffer */ |
| 228 | ONENAND_SET_NEXT_BUFFERRAM(this); |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | if (block != -1) { |
| 234 | /* Write 'DFS, FBA' of Flash */ |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 235 | value = onenand_block_address(this, block); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 236 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); |
Kyungmin Park | 3cecf69 | 2006-05-12 17:02:51 +0300 | [diff] [blame] | 237 | |
Kyungmin Park | 7528707 | 2006-05-12 17:03:23 +0300 | [diff] [blame] | 238 | if (block_cmd) { |
Kyungmin Park | 3cecf69 | 2006-05-12 17:02:51 +0300 | [diff] [blame] | 239 | /* Select DataRAM for DDP */ |
| 240 | value = onenand_bufferram_address(this, block); |
| 241 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); |
| 242 | } |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | if (page != -1) { |
| 246 | int dataram; |
| 247 | |
| 248 | switch (cmd) { |
| 249 | case ONENAND_CMD_READ: |
| 250 | case ONENAND_CMD_READOOB: |
| 251 | dataram = ONENAND_SET_NEXT_BUFFERRAM(this); |
| 252 | readcmd = 1; |
| 253 | break; |
| 254 | |
| 255 | default: |
| 256 | dataram = ONENAND_CURRENT_BUFFERRAM(this); |
| 257 | break; |
| 258 | } |
| 259 | |
| 260 | /* Write 'FPA, FSA' of Flash */ |
| 261 | value = onenand_page_address(page, sectors); |
| 262 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS8); |
| 263 | |
| 264 | /* Write 'BSA, BSC' of DataRAM */ |
| 265 | value = onenand_buffer_address(dataram, sectors, count); |
| 266 | this->write_word(value, this->base + ONENAND_REG_START_BUFFER); |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 267 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 268 | if (readcmd) { |
| 269 | /* Select DataRAM for DDP */ |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 270 | value = onenand_bufferram_address(this, block); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 271 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | /* Interrupt clear */ |
| 276 | this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT); |
| 277 | |
| 278 | /* Write command */ |
| 279 | this->write_word(cmd, this->base + ONENAND_REG_COMMAND); |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * onenand_wait - [DEFAULT] wait until the command is done |
| 286 | * @param mtd MTD device structure |
| 287 | * @param state state to select the max. timeout value |
| 288 | * |
| 289 | * Wait for command done. This applies to all OneNAND command |
| 290 | * Read can take up to 30us, erase up to 2ms and program up to 350us |
| 291 | * according to general OneNAND specs |
| 292 | */ |
| 293 | static int onenand_wait(struct mtd_info *mtd, int state) |
| 294 | { |
| 295 | struct onenand_chip * this = mtd->priv; |
| 296 | unsigned long timeout; |
| 297 | unsigned int flags = ONENAND_INT_MASTER; |
| 298 | unsigned int interrupt = 0; |
| 299 | unsigned int ctrl, ecc; |
| 300 | |
| 301 | /* The 20 msec is enough */ |
| 302 | timeout = jiffies + msecs_to_jiffies(20); |
| 303 | while (time_before(jiffies, timeout)) { |
| 304 | interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); |
| 305 | |
| 306 | if (interrupt & flags) |
| 307 | break; |
| 308 | |
| 309 | if (state != FL_READING) |
| 310 | cond_resched(); |
Kyungmin Park | 628bee6 | 2006-05-12 17:02:24 +0300 | [diff] [blame] | 311 | touch_softlockup_watchdog(); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 312 | } |
| 313 | /* To get correct interrupt status in timeout case */ |
| 314 | interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); |
| 315 | |
| 316 | ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS); |
| 317 | |
| 318 | if (ctrl & ONENAND_CTRL_ERROR) { |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 319 | /* It maybe occur at initial bad block */ |
| 320 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x\n", ctrl); |
| 321 | /* Clear other interrupt bits for preventing ECC error */ |
| 322 | interrupt &= ONENAND_INT_MASTER; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | if (ctrl & ONENAND_CTRL_LOCK) { |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 326 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error = 0x%04x\n", ctrl); |
| 327 | return -EACCES; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 328 | } |
| 329 | |
| 330 | if (interrupt & ONENAND_INT_READ) { |
| 331 | ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS); |
| 332 | if (ecc & ONENAND_ECC_2BIT_ALL) { |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 333 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 334 | return -EBADMSG; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * onenand_bufferram_offset - [DEFAULT] BufferRAM offset |
| 343 | * @param mtd MTD data structure |
| 344 | * @param area BufferRAM area |
| 345 | * @return offset given area |
| 346 | * |
| 347 | * Return BufferRAM offset given area |
| 348 | */ |
| 349 | static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area) |
| 350 | { |
| 351 | struct onenand_chip *this = mtd->priv; |
| 352 | |
| 353 | if (ONENAND_CURRENT_BUFFERRAM(this)) { |
| 354 | if (area == ONENAND_DATARAM) |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 355 | return mtd->writesize; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 356 | if (area == ONENAND_SPARERAM) |
| 357 | return mtd->oobsize; |
| 358 | } |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | /** |
| 364 | * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area |
| 365 | * @param mtd MTD data structure |
| 366 | * @param area BufferRAM area |
| 367 | * @param buffer the databuffer to put/get data |
| 368 | * @param offset offset to read from or write to |
| 369 | * @param count number of bytes to read/write |
| 370 | * |
| 371 | * Read the BufferRAM area |
| 372 | */ |
| 373 | static int onenand_read_bufferram(struct mtd_info *mtd, int area, |
| 374 | unsigned char *buffer, int offset, size_t count) |
| 375 | { |
| 376 | struct onenand_chip *this = mtd->priv; |
| 377 | void __iomem *bufferram; |
| 378 | |
| 379 | bufferram = this->base + area; |
| 380 | |
| 381 | bufferram += onenand_bufferram_offset(mtd, area); |
| 382 | |
Kyungmin Park | 9c01f87d | 2006-05-12 17:02:31 +0300 | [diff] [blame] | 383 | if (ONENAND_CHECK_BYTE_ACCESS(count)) { |
| 384 | unsigned short word; |
| 385 | |
| 386 | /* Align with word(16-bit) size */ |
| 387 | count--; |
| 388 | |
| 389 | /* Read word and save byte */ |
| 390 | word = this->read_word(bufferram + offset + count); |
| 391 | buffer[count] = (word & 0xff); |
| 392 | } |
| 393 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 394 | memcpy(buffer, bufferram + offset, count); |
| 395 | |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | /** |
Kyungmin Park | 52b0eea | 2005-09-03 07:07:19 +0100 | [diff] [blame] | 400 | * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode |
| 401 | * @param mtd MTD data structure |
| 402 | * @param area BufferRAM area |
| 403 | * @param buffer the databuffer to put/get data |
| 404 | * @param offset offset to read from or write to |
| 405 | * @param count number of bytes to read/write |
| 406 | * |
| 407 | * Read the BufferRAM area with Sync. Burst Mode |
| 408 | */ |
| 409 | static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area, |
| 410 | unsigned char *buffer, int offset, size_t count) |
| 411 | { |
| 412 | struct onenand_chip *this = mtd->priv; |
| 413 | void __iomem *bufferram; |
| 414 | |
| 415 | bufferram = this->base + area; |
| 416 | |
| 417 | bufferram += onenand_bufferram_offset(mtd, area); |
| 418 | |
| 419 | this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ); |
| 420 | |
Kyungmin Park | 9c01f87d | 2006-05-12 17:02:31 +0300 | [diff] [blame] | 421 | if (ONENAND_CHECK_BYTE_ACCESS(count)) { |
| 422 | unsigned short word; |
| 423 | |
| 424 | /* Align with word(16-bit) size */ |
| 425 | count--; |
| 426 | |
| 427 | /* Read word and save byte */ |
| 428 | word = this->read_word(bufferram + offset + count); |
| 429 | buffer[count] = (word & 0xff); |
| 430 | } |
| 431 | |
Kyungmin Park | 52b0eea | 2005-09-03 07:07:19 +0100 | [diff] [blame] | 432 | memcpy(buffer, bufferram + offset, count); |
| 433 | |
| 434 | this->mmcontrol(mtd, 0); |
| 435 | |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | /** |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 440 | * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area |
| 441 | * @param mtd MTD data structure |
| 442 | * @param area BufferRAM area |
| 443 | * @param buffer the databuffer to put/get data |
| 444 | * @param offset offset to read from or write to |
| 445 | * @param count number of bytes to read/write |
| 446 | * |
| 447 | * Write the BufferRAM area |
| 448 | */ |
| 449 | static int onenand_write_bufferram(struct mtd_info *mtd, int area, |
| 450 | const unsigned char *buffer, int offset, size_t count) |
| 451 | { |
| 452 | struct onenand_chip *this = mtd->priv; |
| 453 | void __iomem *bufferram; |
| 454 | |
| 455 | bufferram = this->base + area; |
| 456 | |
| 457 | bufferram += onenand_bufferram_offset(mtd, area); |
| 458 | |
Kyungmin Park | 9c01f87d | 2006-05-12 17:02:31 +0300 | [diff] [blame] | 459 | if (ONENAND_CHECK_BYTE_ACCESS(count)) { |
| 460 | unsigned short word; |
| 461 | int byte_offset; |
| 462 | |
| 463 | /* Align with word(16-bit) size */ |
| 464 | count--; |
| 465 | |
| 466 | /* Calculate byte access offset */ |
| 467 | byte_offset = offset + count; |
| 468 | |
| 469 | /* Read word and save byte */ |
| 470 | word = this->read_word(bufferram + byte_offset); |
| 471 | word = (word & ~0xff) | buffer[count]; |
| 472 | this->write_word(word, bufferram + byte_offset); |
| 473 | } |
| 474 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 475 | memcpy(bufferram + offset, buffer, count); |
| 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * onenand_check_bufferram - [GENERIC] Check BufferRAM information |
| 482 | * @param mtd MTD data structure |
| 483 | * @param addr address to check |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 484 | * @return 1 if there are valid data, otherwise 0 |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 485 | * |
| 486 | * Check bufferram if there is data we required |
| 487 | */ |
| 488 | static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr) |
| 489 | { |
| 490 | struct onenand_chip *this = mtd->priv; |
| 491 | int block, page; |
| 492 | int i; |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 493 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 494 | block = (int) (addr >> this->erase_shift); |
| 495 | page = (int) (addr >> this->page_shift); |
| 496 | page &= this->page_mask; |
| 497 | |
| 498 | i = ONENAND_CURRENT_BUFFERRAM(this); |
| 499 | |
| 500 | /* Is there valid data? */ |
| 501 | if (this->bufferram[i].block == block && |
| 502 | this->bufferram[i].page == page && |
| 503 | this->bufferram[i].valid) |
| 504 | return 1; |
| 505 | |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | /** |
| 510 | * onenand_update_bufferram - [GENERIC] Update BufferRAM information |
| 511 | * @param mtd MTD data structure |
| 512 | * @param addr address to update |
| 513 | * @param valid valid flag |
| 514 | * |
| 515 | * Update BufferRAM information |
| 516 | */ |
| 517 | static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr, |
| 518 | int valid) |
| 519 | { |
| 520 | struct onenand_chip *this = mtd->priv; |
| 521 | int block, page; |
| 522 | int i; |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 523 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 524 | block = (int) (addr >> this->erase_shift); |
| 525 | page = (int) (addr >> this->page_shift); |
| 526 | page &= this->page_mask; |
| 527 | |
| 528 | /* Invalidate BufferRAM */ |
| 529 | for (i = 0; i < MAX_BUFFERRAM; i++) { |
| 530 | if (this->bufferram[i].block == block && |
| 531 | this->bufferram[i].page == page) |
| 532 | this->bufferram[i].valid = 0; |
| 533 | } |
| 534 | |
| 535 | /* Update BufferRAM */ |
| 536 | i = ONENAND_CURRENT_BUFFERRAM(this); |
| 537 | this->bufferram[i].block = block; |
| 538 | this->bufferram[i].page = page; |
| 539 | this->bufferram[i].valid = valid; |
| 540 | |
| 541 | return 0; |
| 542 | } |
| 543 | |
| 544 | /** |
| 545 | * onenand_get_device - [GENERIC] Get chip for selected access |
| 546 | * @param mtd MTD device structure |
| 547 | * @param new_state the state which is requested |
| 548 | * |
| 549 | * Get the device and lock it for exclusive access |
| 550 | */ |
Kyungmin Park | a41371e | 2005-09-29 03:55:31 +0100 | [diff] [blame] | 551 | static int onenand_get_device(struct mtd_info *mtd, int new_state) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 552 | { |
| 553 | struct onenand_chip *this = mtd->priv; |
| 554 | DECLARE_WAITQUEUE(wait, current); |
| 555 | |
| 556 | /* |
| 557 | * Grab the lock and see if the device is available |
| 558 | */ |
| 559 | while (1) { |
| 560 | spin_lock(&this->chip_lock); |
| 561 | if (this->state == FL_READY) { |
| 562 | this->state = new_state; |
| 563 | spin_unlock(&this->chip_lock); |
| 564 | break; |
| 565 | } |
Kyungmin Park | a41371e | 2005-09-29 03:55:31 +0100 | [diff] [blame] | 566 | if (new_state == FL_PM_SUSPENDED) { |
| 567 | spin_unlock(&this->chip_lock); |
| 568 | return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; |
| 569 | } |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 570 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 571 | add_wait_queue(&this->wq, &wait); |
| 572 | spin_unlock(&this->chip_lock); |
| 573 | schedule(); |
| 574 | remove_wait_queue(&this->wq, &wait); |
| 575 | } |
Kyungmin Park | a41371e | 2005-09-29 03:55:31 +0100 | [diff] [blame] | 576 | |
| 577 | return 0; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | /** |
| 581 | * onenand_release_device - [GENERIC] release chip |
| 582 | * @param mtd MTD device structure |
| 583 | * |
| 584 | * Deselect, release chip lock and wake up anyone waiting on the device |
| 585 | */ |
| 586 | static void onenand_release_device(struct mtd_info *mtd) |
| 587 | { |
| 588 | struct onenand_chip *this = mtd->priv; |
| 589 | |
| 590 | /* Release the chip */ |
| 591 | spin_lock(&this->chip_lock); |
| 592 | this->state = FL_READY; |
| 593 | wake_up(&this->wq); |
| 594 | spin_unlock(&this->chip_lock); |
| 595 | } |
| 596 | |
| 597 | /** |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 598 | * onenand_read - [MTD Interface] Read data from flash |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 599 | * @param mtd MTD device structure |
| 600 | * @param from offset to read from |
| 601 | * @param len number of bytes to read |
| 602 | * @param retlen pointer to variable to store the number of read bytes |
| 603 | * @param buf the databuffer to put data |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 604 | * |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 605 | * Read with ecc |
| 606 | */ |
| 607 | static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 608 | size_t *retlen, u_char *buf) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 609 | { |
| 610 | struct onenand_chip *this = mtd->priv; |
| 611 | int read = 0, column; |
| 612 | int thislen; |
| 613 | int ret = 0; |
| 614 | |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 615 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_read: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 616 | |
| 617 | /* Do not allow reads past end of device */ |
| 618 | if ((from + len) > mtd->size) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 619 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read: Attempt read beyond end of device\n"); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 620 | *retlen = 0; |
| 621 | return -EINVAL; |
| 622 | } |
| 623 | |
| 624 | /* Grab the lock and see if the device is available */ |
| 625 | onenand_get_device(mtd, FL_READING); |
| 626 | |
| 627 | /* TODO handling oob */ |
| 628 | |
| 629 | while (read < len) { |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 630 | thislen = min_t(int, mtd->writesize, len - read); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 631 | |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 632 | column = from & (mtd->writesize - 1); |
| 633 | if (column + thislen > mtd->writesize) |
| 634 | thislen = mtd->writesize - column; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 635 | |
| 636 | if (!onenand_check_bufferram(mtd, from)) { |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 637 | this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 638 | |
| 639 | ret = this->wait(mtd, FL_READING); |
| 640 | /* First copy data and check return value for ECC handling */ |
| 641 | onenand_update_bufferram(mtd, from, 1); |
| 642 | } |
| 643 | |
| 644 | this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen); |
| 645 | |
| 646 | read += thislen; |
| 647 | |
| 648 | if (read == len) |
| 649 | break; |
| 650 | |
| 651 | if (ret) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 652 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read: read failed = %d\n", ret); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 653 | goto out; |
| 654 | } |
| 655 | |
| 656 | from += thislen; |
| 657 | buf += thislen; |
| 658 | } |
| 659 | |
| 660 | out: |
| 661 | /* Deselect and wake up anyone waiting on the device */ |
| 662 | onenand_release_device(mtd); |
| 663 | |
| 664 | /* |
| 665 | * Return success, if no ECC failures, else -EBADMSG |
| 666 | * fs driver will take care of that, because |
| 667 | * retlen == desired len and result == -EBADMSG |
| 668 | */ |
| 669 | *retlen = read; |
| 670 | return ret; |
| 671 | } |
| 672 | |
| 673 | /** |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 674 | * onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 675 | * @param mtd MTD device structure |
| 676 | * @param from offset to read from |
| 677 | * @param len number of bytes to read |
| 678 | * @param retlen pointer to variable to store the number of read bytes |
| 679 | * @param buf the databuffer to put data |
| 680 | * |
| 681 | * OneNAND read out-of-band data from the spare area |
| 682 | */ |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 683 | int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len, |
| 684 | size_t *retlen, u_char *buf) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 685 | { |
| 686 | struct onenand_chip *this = mtd->priv; |
| 687 | int read = 0, thislen, column; |
| 688 | int ret = 0; |
| 689 | |
| 690 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); |
| 691 | |
| 692 | /* Initialize return length value */ |
| 693 | *retlen = 0; |
| 694 | |
| 695 | /* Do not allow reads past end of device */ |
| 696 | if (unlikely((from + len) > mtd->size)) { |
| 697 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempt read beyond end of device\n"); |
| 698 | return -EINVAL; |
| 699 | } |
| 700 | |
| 701 | /* Grab the lock and see if the device is available */ |
| 702 | onenand_get_device(mtd, FL_READING); |
| 703 | |
| 704 | column = from & (mtd->oobsize - 1); |
| 705 | |
| 706 | while (read < len) { |
| 707 | thislen = mtd->oobsize - column; |
| 708 | thislen = min_t(int, thislen, len); |
| 709 | |
| 710 | this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize); |
| 711 | |
| 712 | onenand_update_bufferram(mtd, from, 0); |
| 713 | |
| 714 | ret = this->wait(mtd, FL_READING); |
| 715 | /* First copy data and check return value for ECC handling */ |
| 716 | |
| 717 | this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen); |
| 718 | |
| 719 | read += thislen; |
| 720 | |
| 721 | if (read == len) |
| 722 | break; |
| 723 | |
| 724 | if (ret) { |
| 725 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: read failed = %d\n", ret); |
| 726 | goto out; |
| 727 | } |
| 728 | |
| 729 | buf += thislen; |
| 730 | |
| 731 | /* Read more? */ |
| 732 | if (read < len) { |
| 733 | /* Page size */ |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 734 | from += mtd->writesize; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 735 | column = 0; |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | out: |
| 740 | /* Deselect and wake up anyone waiting on the device */ |
| 741 | onenand_release_device(mtd); |
| 742 | |
| 743 | *retlen = read; |
| 744 | return ret; |
| 745 | } |
| 746 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 747 | /** |
| 748 | * onenand_read_oob - [MTD Interface] NAND write data and/or out-of-band |
| 749 | * @mtd: MTD device structure |
| 750 | * @from: offset to read from |
| 751 | * @ops: oob operation description structure |
| 752 | */ |
| 753 | static int onenand_read_oob(struct mtd_info *mtd, loff_t from, |
| 754 | struct mtd_oob_ops *ops) |
| 755 | { |
| 756 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
| 757 | |
| 758 | return onenand_do_read_oob(mtd, from + ops->ooboffs, ops->len, |
| 759 | &ops->retlen, ops->oobbuf); |
| 760 | } |
| 761 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 762 | #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE |
| 763 | /** |
Kyungmin Park | 8e6ec69 | 2006-05-12 17:02:41 +0300 | [diff] [blame] | 764 | * onenand_verify_oob - [GENERIC] verify the oob contents after a write |
| 765 | * @param mtd MTD device structure |
| 766 | * @param buf the databuffer to verify |
| 767 | * @param to offset to read from |
| 768 | * @param len number of bytes to read and compare |
| 769 | * |
| 770 | */ |
| 771 | static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to, int len) |
| 772 | { |
| 773 | struct onenand_chip *this = mtd->priv; |
| 774 | char *readp = this->page_buf; |
| 775 | int column = to & (mtd->oobsize - 1); |
| 776 | int status, i; |
| 777 | |
| 778 | this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize); |
| 779 | onenand_update_bufferram(mtd, to, 0); |
| 780 | status = this->wait(mtd, FL_READING); |
| 781 | if (status) |
| 782 | return status; |
| 783 | |
| 784 | this->read_bufferram(mtd, ONENAND_SPARERAM, readp, column, len); |
| 785 | |
| 786 | for(i = 0; i < len; i++) |
| 787 | if (buf[i] != 0xFF && buf[i] != readp[i]) |
| 788 | return -EBADMSG; |
| 789 | |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | /** |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 794 | * onenand_verify_page - [GENERIC] verify the chip contents after a write |
| 795 | * @param mtd MTD device structure |
| 796 | * @param buf the databuffer to verify |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 797 | * |
| 798 | * Check DataRAM area directly |
| 799 | */ |
Kyungmin Park | d36d63d | 2005-09-03 07:36:21 +0100 | [diff] [blame] | 800 | static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 801 | { |
| 802 | struct onenand_chip *this = mtd->priv; |
| 803 | void __iomem *dataram0, *dataram1; |
| 804 | int ret = 0; |
| 805 | |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 806 | this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 807 | |
| 808 | ret = this->wait(mtd, FL_READING); |
| 809 | if (ret) |
| 810 | return ret; |
| 811 | |
| 812 | onenand_update_bufferram(mtd, addr, 1); |
| 813 | |
| 814 | /* Check, if the two dataram areas are same */ |
| 815 | dataram0 = this->base + ONENAND_DATARAM; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 816 | dataram1 = dataram0 + mtd->writesize; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 817 | |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 818 | if (memcmp(dataram0, dataram1, mtd->writesize)) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 819 | return -EBADMSG; |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 820 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 821 | return 0; |
| 822 | } |
| 823 | #else |
| 824 | #define onenand_verify_page(...) (0) |
Kyungmin Park | 8e6ec69 | 2006-05-12 17:02:41 +0300 | [diff] [blame] | 825 | #define onenand_verify_oob(...) (0) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 826 | #endif |
| 827 | |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 828 | #define NOTALIGNED(x) ((x & (mtd->writesize - 1)) != 0) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 829 | |
| 830 | /** |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 831 | * onenand_write - [MTD Interface] write buffer to FLASH |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 832 | * @param mtd MTD device structure |
| 833 | * @param to offset to write to |
| 834 | * @param len number of bytes to write |
| 835 | * @param retlen pointer to variable to store the number of written bytes |
| 836 | * @param buf the data to write |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 837 | * |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 838 | * Write with ECC |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 839 | */ |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 840 | static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, |
| 841 | size_t *retlen, const u_char *buf) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 842 | { |
| 843 | struct onenand_chip *this = mtd->priv; |
| 844 | int written = 0; |
| 845 | int ret = 0; |
| 846 | |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 847 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 848 | |
| 849 | /* Initialize retlen, in case of early exit */ |
| 850 | *retlen = 0; |
| 851 | |
| 852 | /* Do not allow writes past end of device */ |
| 853 | if (unlikely((to + len) > mtd->size)) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 854 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt write to past end of device\n"); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 855 | return -EINVAL; |
| 856 | } |
| 857 | |
| 858 | /* Reject writes, which are not page aligned */ |
| 859 | if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 860 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt to write not page aligned data\n"); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 861 | return -EINVAL; |
| 862 | } |
| 863 | |
| 864 | /* Grab the lock and see if the device is available */ |
| 865 | onenand_get_device(mtd, FL_WRITING); |
| 866 | |
| 867 | /* Loop until all data write */ |
| 868 | while (written < len) { |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 869 | int thislen = min_t(int, mtd->writesize, len - written); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 870 | |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 871 | this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->writesize); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 872 | |
| 873 | this->write_bufferram(mtd, ONENAND_DATARAM, buf, 0, thislen); |
| 874 | this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize); |
| 875 | |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 876 | this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 877 | |
| 878 | onenand_update_bufferram(mtd, to, 1); |
| 879 | |
| 880 | ret = this->wait(mtd, FL_WRITING); |
| 881 | if (ret) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 882 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: write filaed %d\n", ret); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 883 | goto out; |
| 884 | } |
| 885 | |
| 886 | written += thislen; |
| 887 | |
| 888 | /* Only check verify write turn on */ |
Kyungmin Park | d36d63d | 2005-09-03 07:36:21 +0100 | [diff] [blame] | 889 | ret = onenand_verify_page(mtd, (u_char *) buf, to); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 890 | if (ret) { |
Thomas Gleixner | 9223a45 | 2006-05-23 17:21:03 +0200 | [diff] [blame] | 891 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: verify failed %d\n", ret); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 892 | goto out; |
| 893 | } |
| 894 | |
| 895 | if (written == len) |
| 896 | break; |
| 897 | |
| 898 | to += thislen; |
| 899 | buf += thislen; |
| 900 | } |
| 901 | |
| 902 | out: |
| 903 | /* Deselect and wake up anyone waiting on the device */ |
| 904 | onenand_release_device(mtd); |
| 905 | |
| 906 | *retlen = written; |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 907 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 908 | return ret; |
| 909 | } |
| 910 | |
| 911 | /** |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 912 | * onenand_do_write_oob - [Internal] OneNAND write out-of-band |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 913 | * @param mtd MTD device structure |
| 914 | * @param to offset to write to |
| 915 | * @param len number of bytes to write |
| 916 | * @param retlen pointer to variable to store the number of written bytes |
| 917 | * @param buf the data to write |
| 918 | * |
| 919 | * OneNAND write out-of-band |
| 920 | */ |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 921 | static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len, |
| 922 | size_t *retlen, const u_char *buf) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 923 | { |
| 924 | struct onenand_chip *this = mtd->priv; |
Kyungmin Park | 8e6ec69 | 2006-05-12 17:02:41 +0300 | [diff] [blame] | 925 | int column, ret = 0; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 926 | int written = 0; |
| 927 | |
| 928 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); |
| 929 | |
| 930 | /* Initialize retlen, in case of early exit */ |
| 931 | *retlen = 0; |
| 932 | |
| 933 | /* Do not allow writes past end of device */ |
| 934 | if (unlikely((to + len) > mtd->size)) { |
| 935 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempt write to past end of device\n"); |
| 936 | return -EINVAL; |
| 937 | } |
| 938 | |
| 939 | /* Grab the lock and see if the device is available */ |
| 940 | onenand_get_device(mtd, FL_WRITING); |
| 941 | |
| 942 | /* Loop until all data write */ |
| 943 | while (written < len) { |
| 944 | int thislen = min_t(int, mtd->oobsize, len - written); |
| 945 | |
| 946 | column = to & (mtd->oobsize - 1); |
| 947 | |
| 948 | this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize); |
| 949 | |
Kyungmin Park | 34c1060 | 2006-05-12 17:02:46 +0300 | [diff] [blame] | 950 | /* We send data to spare ram with oobsize |
| 951 | * to prevent byte access */ |
| 952 | memset(this->page_buf, 0xff, mtd->oobsize); |
| 953 | memcpy(this->page_buf + column, buf, thislen); |
| 954 | this->write_bufferram(mtd, ONENAND_SPARERAM, this->page_buf, 0, mtd->oobsize); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 955 | |
| 956 | this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize); |
| 957 | |
| 958 | onenand_update_bufferram(mtd, to, 0); |
| 959 | |
Kyungmin Park | 8e6ec69 | 2006-05-12 17:02:41 +0300 | [diff] [blame] | 960 | ret = this->wait(mtd, FL_WRITING); |
| 961 | if (ret) { |
| 962 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: write filaed %d\n", ret); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 963 | goto out; |
Kyungmin Park | 8e6ec69 | 2006-05-12 17:02:41 +0300 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | ret = onenand_verify_oob(mtd, buf, to, thislen); |
| 967 | if (ret) { |
| 968 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: verify failed %d\n", ret); |
| 969 | goto out; |
| 970 | } |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 971 | |
| 972 | written += thislen; |
| 973 | |
| 974 | if (written == len) |
| 975 | break; |
| 976 | |
| 977 | to += thislen; |
| 978 | buf += thislen; |
| 979 | } |
| 980 | |
| 981 | out: |
| 982 | /* Deselect and wake up anyone waiting on the device */ |
| 983 | onenand_release_device(mtd); |
| 984 | |
| 985 | *retlen = written; |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 986 | |
Kyungmin Park | 8e6ec69 | 2006-05-12 17:02:41 +0300 | [diff] [blame] | 987 | return ret; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 988 | } |
| 989 | |
| 990 | /** |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 991 | * onenand_write_oob - [MTD Interface] NAND write data and/or out-of-band |
| 992 | * @mtd: MTD device structure |
| 993 | * @from: offset to read from |
| 994 | * @ops: oob operation description structure |
| 995 | */ |
| 996 | static int onenand_write_oob(struct mtd_info *mtd, loff_t to, |
| 997 | struct mtd_oob_ops *ops) |
| 998 | { |
| 999 | BUG_ON(ops->mode != MTD_OOB_PLACE); |
| 1000 | |
| 1001 | return onenand_do_write_oob(mtd, to + ops->ooboffs, ops->len, |
| 1002 | &ops->retlen, ops->oobbuf); |
| 1003 | } |
| 1004 | |
| 1005 | /** |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1006 | * onenand_block_checkbad - [GENERIC] Check if a block is marked bad |
| 1007 | * @param mtd MTD device structure |
| 1008 | * @param ofs offset from device start |
| 1009 | * @param getchip 0, if the chip is already selected |
| 1010 | * @param allowbbt 1, if its allowed to access the bbt area |
| 1011 | * |
| 1012 | * Check, if the block is bad. Either by reading the bad block table or |
| 1013 | * calling of the scan function. |
| 1014 | */ |
| 1015 | static int onenand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) |
| 1016 | { |
| 1017 | struct onenand_chip *this = mtd->priv; |
| 1018 | struct bbm_info *bbm = this->bbm; |
| 1019 | |
| 1020 | /* Return info from the table */ |
| 1021 | return bbm->isbad_bbt(mtd, ofs, allowbbt); |
| 1022 | } |
| 1023 | |
| 1024 | /** |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1025 | * onenand_erase - [MTD Interface] erase block(s) |
| 1026 | * @param mtd MTD device structure |
| 1027 | * @param instr erase instruction |
| 1028 | * |
| 1029 | * Erase one ore more blocks |
| 1030 | */ |
| 1031 | static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr) |
| 1032 | { |
| 1033 | struct onenand_chip *this = mtd->priv; |
| 1034 | unsigned int block_size; |
| 1035 | loff_t addr; |
| 1036 | int len; |
| 1037 | int ret = 0; |
| 1038 | |
| 1039 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr->addr, (unsigned int) instr->len); |
| 1040 | |
| 1041 | block_size = (1 << this->erase_shift); |
| 1042 | |
| 1043 | /* Start address must align on block boundary */ |
| 1044 | if (unlikely(instr->addr & (block_size - 1))) { |
| 1045 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Unaligned address\n"); |
| 1046 | return -EINVAL; |
| 1047 | } |
| 1048 | |
| 1049 | /* Length must align on block boundary */ |
| 1050 | if (unlikely(instr->len & (block_size - 1))) { |
| 1051 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Length not block aligned\n"); |
| 1052 | return -EINVAL; |
| 1053 | } |
| 1054 | |
| 1055 | /* Do not allow erase past end of device */ |
| 1056 | if (unlikely((instr->len + instr->addr) > mtd->size)) { |
| 1057 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Erase past end of device\n"); |
| 1058 | return -EINVAL; |
| 1059 | } |
| 1060 | |
| 1061 | instr->fail_addr = 0xffffffff; |
| 1062 | |
| 1063 | /* Grab the lock and see if the device is available */ |
| 1064 | onenand_get_device(mtd, FL_ERASING); |
| 1065 | |
| 1066 | /* Loop throught the pages */ |
| 1067 | len = instr->len; |
| 1068 | addr = instr->addr; |
| 1069 | |
| 1070 | instr->state = MTD_ERASING; |
| 1071 | |
| 1072 | while (len) { |
| 1073 | |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1074 | /* Check if we have a bad block, we do not erase bad blocks */ |
| 1075 | if (onenand_block_checkbad(mtd, addr, 0, 0)) { |
| 1076 | printk (KERN_WARNING "onenand_erase: attempt to erase a bad block at addr 0x%08x\n", (unsigned int) addr); |
| 1077 | instr->state = MTD_ERASE_FAILED; |
| 1078 | goto erase_exit; |
| 1079 | } |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1080 | |
| 1081 | this->command(mtd, ONENAND_CMD_ERASE, addr, block_size); |
| 1082 | |
| 1083 | ret = this->wait(mtd, FL_ERASING); |
| 1084 | /* Check, if it is write protected */ |
| 1085 | if (ret) { |
| 1086 | if (ret == -EPERM) |
| 1087 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Device is write protected!!!\n"); |
| 1088 | else |
| 1089 | DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift)); |
| 1090 | instr->state = MTD_ERASE_FAILED; |
| 1091 | instr->fail_addr = addr; |
| 1092 | goto erase_exit; |
| 1093 | } |
| 1094 | |
| 1095 | len -= block_size; |
| 1096 | addr += block_size; |
| 1097 | } |
| 1098 | |
| 1099 | instr->state = MTD_ERASE_DONE; |
| 1100 | |
| 1101 | erase_exit: |
| 1102 | |
| 1103 | ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; |
| 1104 | /* Do call back function */ |
| 1105 | if (!ret) |
| 1106 | mtd_erase_callback(instr); |
| 1107 | |
| 1108 | /* Deselect and wake up anyone waiting on the device */ |
| 1109 | onenand_release_device(mtd); |
| 1110 | |
| 1111 | return ret; |
| 1112 | } |
| 1113 | |
| 1114 | /** |
| 1115 | * onenand_sync - [MTD Interface] sync |
| 1116 | * @param mtd MTD device structure |
| 1117 | * |
| 1118 | * Sync is actually a wait for chip ready function |
| 1119 | */ |
| 1120 | static void onenand_sync(struct mtd_info *mtd) |
| 1121 | { |
| 1122 | DEBUG(MTD_DEBUG_LEVEL3, "onenand_sync: called\n"); |
| 1123 | |
| 1124 | /* Grab the lock and see if the device is available */ |
| 1125 | onenand_get_device(mtd, FL_SYNCING); |
| 1126 | |
| 1127 | /* Release it and go back */ |
| 1128 | onenand_release_device(mtd); |
| 1129 | } |
| 1130 | |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1131 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1132 | /** |
| 1133 | * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad |
| 1134 | * @param mtd MTD device structure |
| 1135 | * @param ofs offset relative to mtd start |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1136 | * |
| 1137 | * Check whether the block is bad |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1138 | */ |
| 1139 | static int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs) |
| 1140 | { |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1141 | /* Check for invalid offset */ |
| 1142 | if (ofs > mtd->size) |
| 1143 | return -EINVAL; |
| 1144 | |
| 1145 | return onenand_block_checkbad(mtd, ofs, 1, 0); |
| 1146 | } |
| 1147 | |
| 1148 | /** |
| 1149 | * onenand_default_block_markbad - [DEFAULT] mark a block bad |
| 1150 | * @param mtd MTD device structure |
| 1151 | * @param ofs offset from device start |
| 1152 | * |
| 1153 | * This is the default implementation, which can be overridden by |
| 1154 | * a hardware specific driver. |
| 1155 | */ |
| 1156 | static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) |
| 1157 | { |
| 1158 | struct onenand_chip *this = mtd->priv; |
| 1159 | struct bbm_info *bbm = this->bbm; |
| 1160 | u_char buf[2] = {0, 0}; |
| 1161 | size_t retlen; |
| 1162 | int block; |
| 1163 | |
| 1164 | /* Get block number */ |
| 1165 | block = ((int) ofs) >> bbm->bbt_erase_shift; |
| 1166 | if (bbm->bbt) |
| 1167 | bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); |
| 1168 | |
| 1169 | /* We write two bytes, so we dont have to mess with 16 bit access */ |
| 1170 | ofs += mtd->oobsize + (bbm->badblockpos & ~0x01); |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 1171 | return onenand_do_write_oob(mtd, ofs , 2, &retlen, buf); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1172 | } |
| 1173 | |
| 1174 | /** |
| 1175 | * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad |
| 1176 | * @param mtd MTD device structure |
| 1177 | * @param ofs offset relative to mtd start |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1178 | * |
| 1179 | * Mark the block as bad |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1180 | */ |
| 1181 | static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs) |
| 1182 | { |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1183 | struct onenand_chip *this = mtd->priv; |
| 1184 | int ret; |
| 1185 | |
| 1186 | ret = onenand_block_isbad(mtd, ofs); |
| 1187 | if (ret) { |
| 1188 | /* If it was bad already, return success and do nothing */ |
| 1189 | if (ret > 0) |
| 1190 | return 0; |
| 1191 | return ret; |
| 1192 | } |
| 1193 | |
| 1194 | return this->block_markbad(mtd, ofs); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1195 | } |
| 1196 | |
| 1197 | /** |
| 1198 | * onenand_unlock - [MTD Interface] Unlock block(s) |
| 1199 | * @param mtd MTD device structure |
| 1200 | * @param ofs offset relative to mtd start |
| 1201 | * @param len number of bytes to unlock |
| 1202 | * |
| 1203 | * Unlock one or more blocks |
| 1204 | */ |
| 1205 | static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) |
| 1206 | { |
| 1207 | struct onenand_chip *this = mtd->priv; |
| 1208 | int start, end, block, value, status; |
| 1209 | |
| 1210 | start = ofs >> this->erase_shift; |
| 1211 | end = len >> this->erase_shift; |
| 1212 | |
| 1213 | /* Continuous lock scheme */ |
| 1214 | if (this->options & ONENAND_CONT_LOCK) { |
| 1215 | /* Set start block address */ |
| 1216 | this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS); |
| 1217 | /* Set end block address */ |
| 1218 | this->write_word(end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS); |
| 1219 | /* Write unlock command */ |
| 1220 | this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0); |
| 1221 | |
| 1222 | /* There's no return value */ |
| 1223 | this->wait(mtd, FL_UNLOCKING); |
| 1224 | |
| 1225 | /* Sanity check */ |
| 1226 | while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) |
| 1227 | & ONENAND_CTRL_ONGO) |
| 1228 | continue; |
| 1229 | |
| 1230 | /* Check lock status */ |
| 1231 | status = this->read_word(this->base + ONENAND_REG_WP_STATUS); |
| 1232 | if (!(status & ONENAND_WP_US)) |
| 1233 | printk(KERN_ERR "wp status = 0x%x\n", status); |
| 1234 | |
| 1235 | return 0; |
| 1236 | } |
| 1237 | |
| 1238 | /* Block lock scheme */ |
| 1239 | for (block = start; block < end; block++) { |
Kyungmin Park | 20ba89a | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1240 | /* Set block address */ |
| 1241 | value = onenand_block_address(this, block); |
| 1242 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); |
| 1243 | /* Select DataRAM for DDP */ |
| 1244 | value = onenand_bufferram_address(this, block); |
| 1245 | this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1246 | /* Set start block address */ |
| 1247 | this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS); |
| 1248 | /* Write unlock command */ |
| 1249 | this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0); |
| 1250 | |
| 1251 | /* There's no return value */ |
| 1252 | this->wait(mtd, FL_UNLOCKING); |
| 1253 | |
| 1254 | /* Sanity check */ |
| 1255 | while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) |
| 1256 | & ONENAND_CTRL_ONGO) |
| 1257 | continue; |
| 1258 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1259 | /* Check lock status */ |
| 1260 | status = this->read_word(this->base + ONENAND_REG_WP_STATUS); |
| 1261 | if (!(status & ONENAND_WP_US)) |
| 1262 | printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status); |
| 1263 | } |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 1264 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1265 | return 0; |
| 1266 | } |
| 1267 | |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1268 | #ifdef CONFIG_MTD_ONENAND_OTP |
| 1269 | |
| 1270 | /* Interal OTP operation */ |
| 1271 | typedef int (*otp_op_t)(struct mtd_info *mtd, loff_t form, size_t len, |
| 1272 | size_t *retlen, u_char *buf); |
| 1273 | |
| 1274 | /** |
| 1275 | * do_otp_read - [DEFAULT] Read OTP block area |
| 1276 | * @param mtd MTD device structure |
| 1277 | * @param from The offset to read |
| 1278 | * @param len number of bytes to read |
| 1279 | * @param retlen pointer to variable to store the number of readbytes |
| 1280 | * @param buf the databuffer to put/get data |
| 1281 | * |
| 1282 | * Read OTP block area. |
| 1283 | */ |
| 1284 | static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len, |
| 1285 | size_t *retlen, u_char *buf) |
| 1286 | { |
| 1287 | struct onenand_chip *this = mtd->priv; |
| 1288 | int ret; |
| 1289 | |
| 1290 | /* Enter OTP access mode */ |
| 1291 | this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); |
| 1292 | this->wait(mtd, FL_OTPING); |
| 1293 | |
| 1294 | ret = mtd->read(mtd, from, len, retlen, buf); |
| 1295 | |
| 1296 | /* Exit OTP access mode */ |
| 1297 | this->command(mtd, ONENAND_CMD_RESET, 0, 0); |
| 1298 | this->wait(mtd, FL_RESETING); |
| 1299 | |
| 1300 | return ret; |
| 1301 | } |
| 1302 | |
| 1303 | /** |
| 1304 | * do_otp_write - [DEFAULT] Write OTP block area |
| 1305 | * @param mtd MTD device structure |
| 1306 | * @param from The offset to write |
| 1307 | * @param len number of bytes to write |
| 1308 | * @param retlen pointer to variable to store the number of write bytes |
| 1309 | * @param buf the databuffer to put/get data |
| 1310 | * |
| 1311 | * Write OTP block area. |
| 1312 | */ |
| 1313 | static int do_otp_write(struct mtd_info *mtd, loff_t from, size_t len, |
| 1314 | size_t *retlen, u_char *buf) |
| 1315 | { |
| 1316 | struct onenand_chip *this = mtd->priv; |
| 1317 | unsigned char *pbuf = buf; |
| 1318 | int ret; |
| 1319 | |
| 1320 | /* Force buffer page aligned */ |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1321 | if (len < mtd->writesize) { |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1322 | memcpy(this->page_buf, buf, len); |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1323 | memset(this->page_buf + len, 0xff, mtd->writesize - len); |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1324 | pbuf = this->page_buf; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1325 | len = mtd->writesize; |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1326 | } |
| 1327 | |
| 1328 | /* Enter OTP access mode */ |
| 1329 | this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); |
| 1330 | this->wait(mtd, FL_OTPING); |
| 1331 | |
| 1332 | ret = mtd->write(mtd, from, len, retlen, pbuf); |
| 1333 | |
| 1334 | /* Exit OTP access mode */ |
| 1335 | this->command(mtd, ONENAND_CMD_RESET, 0, 0); |
| 1336 | this->wait(mtd, FL_RESETING); |
| 1337 | |
| 1338 | return ret; |
| 1339 | } |
| 1340 | |
| 1341 | /** |
| 1342 | * do_otp_lock - [DEFAULT] Lock OTP block area |
| 1343 | * @param mtd MTD device structure |
| 1344 | * @param from The offset to lock |
| 1345 | * @param len number of bytes to lock |
| 1346 | * @param retlen pointer to variable to store the number of lock bytes |
| 1347 | * @param buf the databuffer to put/get data |
| 1348 | * |
| 1349 | * Lock OTP block area. |
| 1350 | */ |
| 1351 | static int do_otp_lock(struct mtd_info *mtd, loff_t from, size_t len, |
| 1352 | size_t *retlen, u_char *buf) |
| 1353 | { |
| 1354 | struct onenand_chip *this = mtd->priv; |
| 1355 | int ret; |
| 1356 | |
| 1357 | /* Enter OTP access mode */ |
| 1358 | this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); |
| 1359 | this->wait(mtd, FL_OTPING); |
| 1360 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame^] | 1361 | ret = onenand_do_write_oob(mtd, from, len, retlen, buf); |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1362 | |
| 1363 | /* Exit OTP access mode */ |
| 1364 | this->command(mtd, ONENAND_CMD_RESET, 0, 0); |
| 1365 | this->wait(mtd, FL_RESETING); |
| 1366 | |
| 1367 | return ret; |
| 1368 | } |
| 1369 | |
| 1370 | /** |
| 1371 | * onenand_otp_walk - [DEFAULT] Handle OTP operation |
| 1372 | * @param mtd MTD device structure |
| 1373 | * @param from The offset to read/write |
| 1374 | * @param len number of bytes to read/write |
| 1375 | * @param retlen pointer to variable to store the number of read bytes |
| 1376 | * @param buf the databuffer to put/get data |
| 1377 | * @param action do given action |
| 1378 | * @param mode specify user and factory |
| 1379 | * |
| 1380 | * Handle OTP operation. |
| 1381 | */ |
| 1382 | static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, |
| 1383 | size_t *retlen, u_char *buf, |
| 1384 | otp_op_t action, int mode) |
| 1385 | { |
| 1386 | struct onenand_chip *this = mtd->priv; |
| 1387 | int otp_pages; |
| 1388 | int density; |
| 1389 | int ret = 0; |
| 1390 | |
| 1391 | *retlen = 0; |
| 1392 | |
| 1393 | density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; |
| 1394 | if (density < ONENAND_DEVICE_DENSITY_512Mb) |
| 1395 | otp_pages = 20; |
| 1396 | else |
| 1397 | otp_pages = 10; |
| 1398 | |
| 1399 | if (mode == MTD_OTP_FACTORY) { |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1400 | from += mtd->writesize * otp_pages; |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1401 | otp_pages = 64 - otp_pages; |
| 1402 | } |
| 1403 | |
| 1404 | /* Check User/Factory boundary */ |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1405 | if (((mtd->writesize * otp_pages) - (from + len)) < 0) |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1406 | return 0; |
| 1407 | |
| 1408 | while (len > 0 && otp_pages > 0) { |
| 1409 | if (!action) { /* OTP Info functions */ |
| 1410 | struct otp_info *otpinfo; |
| 1411 | |
| 1412 | len -= sizeof(struct otp_info); |
| 1413 | if (len <= 0) |
| 1414 | return -ENOSPC; |
| 1415 | |
| 1416 | otpinfo = (struct otp_info *) buf; |
| 1417 | otpinfo->start = from; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1418 | otpinfo->length = mtd->writesize; |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1419 | otpinfo->locked = 0; |
| 1420 | |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1421 | from += mtd->writesize; |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1422 | buf += sizeof(struct otp_info); |
| 1423 | *retlen += sizeof(struct otp_info); |
| 1424 | } else { |
| 1425 | size_t tmp_retlen; |
| 1426 | int size = len; |
| 1427 | |
| 1428 | ret = action(mtd, from, len, &tmp_retlen, buf); |
| 1429 | |
| 1430 | buf += size; |
| 1431 | len -= size; |
| 1432 | *retlen += size; |
| 1433 | |
| 1434 | if (ret < 0) |
| 1435 | return ret; |
| 1436 | } |
| 1437 | otp_pages--; |
| 1438 | } |
| 1439 | |
| 1440 | return 0; |
| 1441 | } |
| 1442 | |
| 1443 | /** |
| 1444 | * onenand_get_fact_prot_info - [MTD Interface] Read factory OTP info |
| 1445 | * @param mtd MTD device structure |
| 1446 | * @param buf the databuffer to put/get data |
| 1447 | * @param len number of bytes to read |
| 1448 | * |
| 1449 | * Read factory OTP info. |
| 1450 | */ |
| 1451 | static int onenand_get_fact_prot_info(struct mtd_info *mtd, |
| 1452 | struct otp_info *buf, size_t len) |
| 1453 | { |
| 1454 | size_t retlen; |
| 1455 | int ret; |
| 1456 | |
| 1457 | ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_FACTORY); |
| 1458 | |
| 1459 | return ret ? : retlen; |
| 1460 | } |
| 1461 | |
| 1462 | /** |
| 1463 | * onenand_read_fact_prot_reg - [MTD Interface] Read factory OTP area |
| 1464 | * @param mtd MTD device structure |
| 1465 | * @param from The offset to read |
| 1466 | * @param len number of bytes to read |
| 1467 | * @param retlen pointer to variable to store the number of read bytes |
| 1468 | * @param buf the databuffer to put/get data |
| 1469 | * |
| 1470 | * Read factory OTP area. |
| 1471 | */ |
| 1472 | static int onenand_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, |
| 1473 | size_t len, size_t *retlen, u_char *buf) |
| 1474 | { |
| 1475 | return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_FACTORY); |
| 1476 | } |
| 1477 | |
| 1478 | /** |
| 1479 | * onenand_get_user_prot_info - [MTD Interface] Read user OTP info |
| 1480 | * @param mtd MTD device structure |
| 1481 | * @param buf the databuffer to put/get data |
| 1482 | * @param len number of bytes to read |
| 1483 | * |
| 1484 | * Read user OTP info. |
| 1485 | */ |
| 1486 | static int onenand_get_user_prot_info(struct mtd_info *mtd, |
| 1487 | struct otp_info *buf, size_t len) |
| 1488 | { |
| 1489 | size_t retlen; |
| 1490 | int ret; |
| 1491 | |
| 1492 | ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_USER); |
| 1493 | |
| 1494 | return ret ? : retlen; |
| 1495 | } |
| 1496 | |
| 1497 | /** |
| 1498 | * onenand_read_user_prot_reg - [MTD Interface] Read user OTP area |
| 1499 | * @param mtd MTD device structure |
| 1500 | * @param from The offset to read |
| 1501 | * @param len number of bytes to read |
| 1502 | * @param retlen pointer to variable to store the number of read bytes |
| 1503 | * @param buf the databuffer to put/get data |
| 1504 | * |
| 1505 | * Read user OTP area. |
| 1506 | */ |
| 1507 | static int onenand_read_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 1508 | size_t len, size_t *retlen, u_char *buf) |
| 1509 | { |
| 1510 | return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_USER); |
| 1511 | } |
| 1512 | |
| 1513 | /** |
| 1514 | * onenand_write_user_prot_reg - [MTD Interface] Write user OTP area |
| 1515 | * @param mtd MTD device structure |
| 1516 | * @param from The offset to write |
| 1517 | * @param len number of bytes to write |
| 1518 | * @param retlen pointer to variable to store the number of write bytes |
| 1519 | * @param buf the databuffer to put/get data |
| 1520 | * |
| 1521 | * Write user OTP area. |
| 1522 | */ |
| 1523 | static int onenand_write_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 1524 | size_t len, size_t *retlen, u_char *buf) |
| 1525 | { |
| 1526 | return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_write, MTD_OTP_USER); |
| 1527 | } |
| 1528 | |
| 1529 | /** |
| 1530 | * onenand_lock_user_prot_reg - [MTD Interface] Lock user OTP area |
| 1531 | * @param mtd MTD device structure |
| 1532 | * @param from The offset to lock |
| 1533 | * @param len number of bytes to unlock |
| 1534 | * |
| 1535 | * Write lock mark on spare area in page 0 in OTP block |
| 1536 | */ |
| 1537 | static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, |
| 1538 | size_t len) |
| 1539 | { |
| 1540 | unsigned char oob_buf[64]; |
| 1541 | size_t retlen; |
| 1542 | int ret; |
| 1543 | |
| 1544 | memset(oob_buf, 0xff, mtd->oobsize); |
| 1545 | /* |
| 1546 | * Note: OTP lock operation |
| 1547 | * OTP block : 0xXXFC |
| 1548 | * 1st block : 0xXXF3 (If chip support) |
| 1549 | * Both : 0xXXF0 (If chip support) |
| 1550 | */ |
| 1551 | oob_buf[ONENAND_OTP_LOCK_OFFSET] = 0xFC; |
| 1552 | |
| 1553 | /* |
| 1554 | * Write lock mark to 8th word of sector0 of page0 of the spare0. |
| 1555 | * We write 16 bytes spare area instead of 2 bytes. |
| 1556 | */ |
| 1557 | from = 0; |
| 1558 | len = 16; |
| 1559 | |
| 1560 | ret = onenand_otp_walk(mtd, from, len, &retlen, oob_buf, do_otp_lock, MTD_OTP_USER); |
| 1561 | |
| 1562 | return ret ? : retlen; |
| 1563 | } |
| 1564 | #endif /* CONFIG_MTD_ONENAND_OTP */ |
| 1565 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1566 | /** |
| 1567 | * onenand_print_device_info - Print device ID |
| 1568 | * @param device device ID |
| 1569 | * |
| 1570 | * Print device ID |
| 1571 | */ |
| 1572 | static void onenand_print_device_info(int device) |
| 1573 | { |
| 1574 | int vcc, demuxed, ddp, density; |
| 1575 | |
| 1576 | vcc = device & ONENAND_DEVICE_VCC_MASK; |
| 1577 | demuxed = device & ONENAND_DEVICE_IS_DEMUX; |
| 1578 | ddp = device & ONENAND_DEVICE_IS_DDP; |
| 1579 | density = device >> ONENAND_DEVICE_DENSITY_SHIFT; |
| 1580 | printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n", |
| 1581 | demuxed ? "" : "Muxed ", |
| 1582 | ddp ? "(DDP)" : "", |
| 1583 | (16 << density), |
| 1584 | vcc ? "2.65/3.3" : "1.8", |
| 1585 | device); |
| 1586 | } |
| 1587 | |
| 1588 | static const struct onenand_manufacturers onenand_manuf_ids[] = { |
| 1589 | {ONENAND_MFR_SAMSUNG, "Samsung"}, |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1590 | }; |
| 1591 | |
| 1592 | /** |
| 1593 | * onenand_check_maf - Check manufacturer ID |
| 1594 | * @param manuf manufacturer ID |
| 1595 | * |
| 1596 | * Check manufacturer ID |
| 1597 | */ |
| 1598 | static int onenand_check_maf(int manuf) |
| 1599 | { |
Kyungmin Park | 37b1cc3 | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1600 | int size = ARRAY_SIZE(onenand_manuf_ids); |
| 1601 | char *name; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1602 | int i; |
| 1603 | |
Kyungmin Park | 37b1cc3 | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1604 | for (i = 0; i < size; i++) |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1605 | if (manuf == onenand_manuf_ids[i].id) |
| 1606 | break; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1607 | |
Kyungmin Park | 37b1cc3 | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1608 | if (i < size) |
| 1609 | name = onenand_manuf_ids[i].name; |
| 1610 | else |
| 1611 | name = "Unknown"; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1612 | |
Kyungmin Park | 37b1cc3 | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1613 | printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf); |
| 1614 | |
| 1615 | return (i == size); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1616 | } |
| 1617 | |
| 1618 | /** |
| 1619 | * onenand_probe - [OneNAND Interface] Probe the OneNAND device |
| 1620 | * @param mtd MTD device structure |
| 1621 | * |
| 1622 | * OneNAND detection method: |
| 1623 | * Compare the the values from command with ones from register |
| 1624 | */ |
| 1625 | static int onenand_probe(struct mtd_info *mtd) |
| 1626 | { |
| 1627 | struct onenand_chip *this = mtd->priv; |
| 1628 | int bram_maf_id, bram_dev_id, maf_id, dev_id; |
| 1629 | int version_id; |
| 1630 | int density; |
| 1631 | |
| 1632 | /* Send the command for reading device ID from BootRAM */ |
| 1633 | this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM); |
| 1634 | |
| 1635 | /* Read manufacturer and device IDs from BootRAM */ |
| 1636 | bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0); |
| 1637 | bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2); |
| 1638 | |
| 1639 | /* Check manufacturer ID */ |
| 1640 | if (onenand_check_maf(bram_maf_id)) |
| 1641 | return -ENXIO; |
| 1642 | |
| 1643 | /* Reset OneNAND to read default register values */ |
| 1644 | this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM); |
| 1645 | |
| 1646 | /* Read manufacturer and device IDs from Register */ |
| 1647 | maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID); |
| 1648 | dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID); |
| 1649 | |
| 1650 | /* Check OneNAND device */ |
| 1651 | if (maf_id != bram_maf_id || dev_id != bram_dev_id) |
| 1652 | return -ENXIO; |
| 1653 | |
| 1654 | /* Flash device information */ |
| 1655 | onenand_print_device_info(dev_id); |
| 1656 | this->device_id = dev_id; |
| 1657 | |
| 1658 | density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; |
| 1659 | this->chipsize = (16 << density) << 20; |
Kyungmin Park | 83a3683 | 2005-09-29 04:53:16 +0100 | [diff] [blame] | 1660 | /* Set density mask. it is used for DDP */ |
| 1661 | this->density_mask = (1 << (density + 6)); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1662 | |
| 1663 | /* OneNAND page size & block size */ |
| 1664 | /* The data buffer size is equal to page size */ |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1665 | mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE); |
| 1666 | mtd->oobsize = mtd->writesize >> 5; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1667 | /* Pagers per block is always 64 in OneNAND */ |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1668 | mtd->erasesize = mtd->writesize << 6; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1669 | |
| 1670 | this->erase_shift = ffs(mtd->erasesize) - 1; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1671 | this->page_shift = ffs(mtd->writesize) - 1; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1672 | this->ppb_shift = (this->erase_shift - this->page_shift); |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1673 | this->page_mask = (mtd->erasesize / mtd->writesize) - 1; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1674 | |
| 1675 | /* REVIST: Multichip handling */ |
| 1676 | |
| 1677 | mtd->size = this->chipsize; |
| 1678 | |
| 1679 | /* Version ID */ |
| 1680 | version_id = this->read_word(this->base + ONENAND_REG_VERSION_ID); |
| 1681 | printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version_id); |
| 1682 | |
| 1683 | /* Lock scheme */ |
| 1684 | if (density <= ONENAND_DEVICE_DENSITY_512Mb && |
| 1685 | !(version_id >> ONENAND_VERSION_PROCESS_SHIFT)) { |
| 1686 | printk(KERN_INFO "Lock scheme is Continues Lock\n"); |
| 1687 | this->options |= ONENAND_CONT_LOCK; |
| 1688 | } |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 1689 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1690 | return 0; |
| 1691 | } |
| 1692 | |
Kyungmin Park | a41371e | 2005-09-29 03:55:31 +0100 | [diff] [blame] | 1693 | /** |
| 1694 | * onenand_suspend - [MTD Interface] Suspend the OneNAND flash |
| 1695 | * @param mtd MTD device structure |
| 1696 | */ |
| 1697 | static int onenand_suspend(struct mtd_info *mtd) |
| 1698 | { |
| 1699 | return onenand_get_device(mtd, FL_PM_SUSPENDED); |
| 1700 | } |
| 1701 | |
| 1702 | /** |
| 1703 | * onenand_resume - [MTD Interface] Resume the OneNAND flash |
| 1704 | * @param mtd MTD device structure |
| 1705 | */ |
| 1706 | static void onenand_resume(struct mtd_info *mtd) |
| 1707 | { |
| 1708 | struct onenand_chip *this = mtd->priv; |
| 1709 | |
| 1710 | if (this->state == FL_PM_SUSPENDED) |
| 1711 | onenand_release_device(mtd); |
| 1712 | else |
| 1713 | printk(KERN_ERR "resume() called for the chip which is not" |
| 1714 | "in suspended state\n"); |
| 1715 | } |
| 1716 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1717 | /** |
| 1718 | * onenand_scan - [OneNAND Interface] Scan for the OneNAND device |
| 1719 | * @param mtd MTD device structure |
| 1720 | * @param maxchips Number of chips to scan for |
| 1721 | * |
| 1722 | * This fills out all the not initialized function pointers |
| 1723 | * with the defaults. |
| 1724 | * The flash ID is read and the mtd/chip structures are |
| 1725 | * filled with the appropriate values. |
| 1726 | */ |
| 1727 | int onenand_scan(struct mtd_info *mtd, int maxchips) |
| 1728 | { |
| 1729 | struct onenand_chip *this = mtd->priv; |
| 1730 | |
| 1731 | if (!this->read_word) |
| 1732 | this->read_word = onenand_readw; |
| 1733 | if (!this->write_word) |
| 1734 | this->write_word = onenand_writew; |
| 1735 | |
| 1736 | if (!this->command) |
| 1737 | this->command = onenand_command; |
| 1738 | if (!this->wait) |
| 1739 | this->wait = onenand_wait; |
| 1740 | |
| 1741 | if (!this->read_bufferram) |
| 1742 | this->read_bufferram = onenand_read_bufferram; |
| 1743 | if (!this->write_bufferram) |
| 1744 | this->write_bufferram = onenand_write_bufferram; |
| 1745 | |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1746 | if (!this->block_markbad) |
| 1747 | this->block_markbad = onenand_default_block_markbad; |
| 1748 | if (!this->scan_bbt) |
| 1749 | this->scan_bbt = onenand_default_bbt; |
| 1750 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1751 | if (onenand_probe(mtd)) |
| 1752 | return -ENXIO; |
| 1753 | |
Kyungmin Park | 52b0eea | 2005-09-03 07:07:19 +0100 | [diff] [blame] | 1754 | /* Set Sync. Burst Read after probing */ |
| 1755 | if (this->mmcontrol) { |
| 1756 | printk(KERN_INFO "OneNAND Sync. Burst Read support\n"); |
| 1757 | this->read_bufferram = onenand_sync_read_bufferram; |
| 1758 | } |
| 1759 | |
Kyungmin Park | 532a37c | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1760 | /* Allocate buffers, if necessary */ |
| 1761 | if (!this->page_buf) { |
| 1762 | size_t len; |
Joern Engel | 2831877 | 2006-05-22 23:18:05 +0200 | [diff] [blame] | 1763 | len = mtd->writesize + mtd->oobsize; |
Kyungmin Park | 532a37c | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1764 | this->page_buf = kmalloc(len, GFP_KERNEL); |
| 1765 | if (!this->page_buf) { |
| 1766 | printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n"); |
| 1767 | return -ENOMEM; |
| 1768 | } |
| 1769 | this->options |= ONENAND_PAGEBUF_ALLOC; |
| 1770 | } |
| 1771 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1772 | this->state = FL_READY; |
| 1773 | init_waitqueue_head(&this->wq); |
| 1774 | spin_lock_init(&this->chip_lock); |
| 1775 | |
| 1776 | switch (mtd->oobsize) { |
| 1777 | case 64: |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 1778 | this->ecclayout = &onenand_oob_64; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1779 | break; |
| 1780 | |
| 1781 | case 32: |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 1782 | this->ecclayout = &onenand_oob_32; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1783 | break; |
| 1784 | |
| 1785 | default: |
| 1786 | printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n", |
| 1787 | mtd->oobsize); |
| 1788 | /* To prevent kernel oops */ |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 1789 | this->ecclayout = &onenand_oob_32; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1790 | break; |
| 1791 | } |
| 1792 | |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 1793 | mtd->ecclayout = this->ecclayout; |
Thomas Gleixner | d5c5e78 | 2005-11-07 11:15:51 +0000 | [diff] [blame] | 1794 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1795 | /* Fill in remaining MTD driver data */ |
| 1796 | mtd->type = MTD_NANDFLASH; |
Joern Engel | 5fa4339 | 2006-05-22 23:18:29 +0200 | [diff] [blame] | 1797 | mtd->flags = MTD_CAP_NANDFLASH; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1798 | mtd->ecctype = MTD_ECC_SW; |
| 1799 | mtd->erase = onenand_erase; |
| 1800 | mtd->point = NULL; |
| 1801 | mtd->unpoint = NULL; |
| 1802 | mtd->read = onenand_read; |
| 1803 | mtd->write = onenand_write; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1804 | mtd->read_oob = onenand_read_oob; |
| 1805 | mtd->write_oob = onenand_write_oob; |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 1806 | #ifdef CONFIG_MTD_ONENAND_OTP |
| 1807 | mtd->get_fact_prot_info = onenand_get_fact_prot_info; |
| 1808 | mtd->read_fact_prot_reg = onenand_read_fact_prot_reg; |
| 1809 | mtd->get_user_prot_info = onenand_get_user_prot_info; |
| 1810 | mtd->read_user_prot_reg = onenand_read_user_prot_reg; |
| 1811 | mtd->write_user_prot_reg = onenand_write_user_prot_reg; |
| 1812 | mtd->lock_user_prot_reg = onenand_lock_user_prot_reg; |
| 1813 | #endif |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1814 | mtd->sync = onenand_sync; |
| 1815 | mtd->lock = NULL; |
| 1816 | mtd->unlock = onenand_unlock; |
Kyungmin Park | a41371e | 2005-09-29 03:55:31 +0100 | [diff] [blame] | 1817 | mtd->suspend = onenand_suspend; |
| 1818 | mtd->resume = onenand_resume; |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1819 | mtd->block_isbad = onenand_block_isbad; |
| 1820 | mtd->block_markbad = onenand_block_markbad; |
| 1821 | mtd->owner = THIS_MODULE; |
| 1822 | |
| 1823 | /* Unlock whole block */ |
| 1824 | mtd->unlock(mtd, 0x0, this->chipsize); |
| 1825 | |
Kyungmin Park | cdc0013 | 2005-09-03 07:15:48 +0100 | [diff] [blame] | 1826 | return this->scan_bbt(mtd); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1827 | } |
| 1828 | |
| 1829 | /** |
| 1830 | * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device |
| 1831 | * @param mtd MTD device structure |
| 1832 | */ |
| 1833 | void onenand_release(struct mtd_info *mtd) |
| 1834 | { |
Kyungmin Park | 532a37c | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1835 | struct onenand_chip *this = mtd->priv; |
| 1836 | |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1837 | #ifdef CONFIG_MTD_PARTITIONS |
| 1838 | /* Deregister partitions */ |
| 1839 | del_mtd_partitions (mtd); |
| 1840 | #endif |
| 1841 | /* Deregister the device */ |
| 1842 | del_mtd_device (mtd); |
Kyungmin Park | 532a37c | 2005-12-16 11:17:29 +0900 | [diff] [blame] | 1843 | |
| 1844 | /* Free bad block table memory, if allocated */ |
| 1845 | if (this->bbm) |
| 1846 | kfree(this->bbm); |
| 1847 | /* Buffer allocated by onenand_scan */ |
| 1848 | if (this->options & ONENAND_PAGEBUF_ALLOC) |
| 1849 | kfree(this->page_buf); |
Kyungmin Park | cd5f634 | 2005-07-11 11:41:53 +0100 | [diff] [blame] | 1850 | } |
| 1851 | |
| 1852 | EXPORT_SYMBOL_GPL(onenand_scan); |
| 1853 | EXPORT_SYMBOL_GPL(onenand_release); |
| 1854 | |
| 1855 | MODULE_LICENSE("GPL"); |
| 1856 | MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); |
| 1857 | MODULE_DESCRIPTION("Generic OneNAND flash driver code"); |