1 /* 2 * linux/include/linux/mtd/nand.h 3 * 4 * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> 5 * Steven J. Hill <sjhill@realitydiluted.com> 6 * Thomas Gleixner <tglx@linutronix.de> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 * 10 * Info: 11 * Contains standard defines and IDs for NAND flash devices 12 * 13 * Changelog: 14 * See git changelog. 15 */ 16 #ifndef __LINUX_MTD_NAND_H 17 #define __LINUX_MTD_NAND_H 18 19 #include "config.h" 20 21 #include "linux/compat.h" 22 #include "linux/mtd/mtd.h" 23 #include "linux/mtd/flashchip.h" 24 #include "linux/mtd/bbm.h" 25 26 struct mtd_info; 27 struct nand_flash_dev; 28 /* Scan and identify a NAND device */ 29 extern int nand_scan(struct mtd_info *mtd, int max_chips); 30 /* 31 * Separate phases of nand_scan(), allowing board driver to intervene 32 * and override command or ECC setup according to flash type. 33 */ 34 extern int nand_scan_ident(struct mtd_info *mtd, int max_chips, 35 struct nand_flash_dev *table); 36 extern int nand_scan_tail(struct mtd_info *mtd); 37 38 /* Free resources held by the NAND device */ 39 extern void nand_release(struct mtd_info *mtd); 40 41 /* Internal helper for board drivers which need to override command function */ 42 extern void nand_wait_ready(struct mtd_info *mtd); 43 44 /* 45 * This constant declares the max. oobsize / page, which 46 * is supported now. If you add a chip with bigger oobsize/page 47 * adjust this accordingly. 48 */ 49 #define NAND_MAX_OOBSIZE 744 50 #define NAND_MAX_PAGESIZE 8192 51 52 /* 53 * Constants for hardware specific CLE/ALE/NCE function 54 * 55 * These are bits which can be or'ed to set/clear multiple 56 * bits in one go. 57 */ 58 /* Select the chip by setting nCE to low */ 59 #define NAND_NCE 0x01 60 /* Select the command latch by setting CLE to high */ 61 #define NAND_CLE 0x02 62 /* Select the address latch by setting ALE to high */ 63 #define NAND_ALE 0x04 64 65 #define NAND_CTRL_CLE (NAND_NCE | NAND_CLE) 66 #define NAND_CTRL_ALE (NAND_NCE | NAND_ALE) 67 #define NAND_CTRL_CHANGE 0x80 68 69 /* 70 * Standard NAND flash commands 71 */ 72 #define NAND_CMD_READ0 0 73 #define NAND_CMD_READ1 1 74 #define NAND_CMD_RNDOUT 5 75 #define NAND_CMD_PAGEPROG 0x10 76 #define NAND_CMD_READOOB 0x50 77 #define NAND_CMD_ERASE1 0x60 78 #define NAND_CMD_STATUS 0x70 79 #define NAND_CMD_SEQIN 0x80 80 #define NAND_CMD_RNDIN 0x85 81 #define NAND_CMD_READID 0x90 82 #define NAND_CMD_ERASE2 0xd0 83 #define NAND_CMD_PARAM 0xec 84 #define NAND_CMD_GET_FEATURES 0xee 85 #define NAND_CMD_SET_FEATURES 0xef 86 #define NAND_CMD_RESET 0xff 87 88 #define NAND_CMD_LOCK 0x2a 89 #define NAND_CMD_UNLOCK1 0x23 90 #define NAND_CMD_UNLOCK2 0x24 91 92 /* Extended commands for large page devices */ 93 #define NAND_CMD_READSTART 0x30 94 #define NAND_CMD_RNDOUTSTART 0xE0 95 #define NAND_CMD_CACHEDPROG 0x15 96 97 /* Extended commands for AG-AND device */ 98 /* 99 * Note: the command for NAND_CMD_DEPLETE1 is really 0x00 but 100 * there is no way to distinguish that from NAND_CMD_READ0 101 * until the remaining sequence of commands has been completed 102 * so add a high order bit and mask it off in the command. 103 */ 104 #define NAND_CMD_DEPLETE1 0x100 105 #define NAND_CMD_DEPLETE2 0x38 106 #define NAND_CMD_STATUS_MULTI 0x71 107 #define NAND_CMD_STATUS_ERROR 0x72 108 /* multi-bank error status (banks 0-3) */ 109 #define NAND_CMD_STATUS_ERROR0 0x73 110 #define NAND_CMD_STATUS_ERROR1 0x74 111 #define NAND_CMD_STATUS_ERROR2 0x75 112 #define NAND_CMD_STATUS_ERROR3 0x76 113 #define NAND_CMD_STATUS_RESET 0x7f 114 #define NAND_CMD_STATUS_CLEAR 0xff 115 116 #define NAND_CMD_NONE -1 117 118 /* Status bits */ 119 #define NAND_STATUS_FAIL 0x01 120 #define NAND_STATUS_FAIL_N1 0x02 121 #define NAND_STATUS_TRUE_READY 0x20 122 #define NAND_STATUS_READY 0x40 123 #define NAND_STATUS_WP 0x80 124 125 /* 126 * Constants for ECC_MODES 127 */ 128 typedef enum { 129 NAND_ECC_NONE, 130 NAND_ECC_SOFT, 131 NAND_ECC_HW, 132 NAND_ECC_HW_SYNDROME, 133 NAND_ECC_HW_OOB_FIRST, 134 NAND_ECC_SOFT_BCH, 135 } nand_ecc_modes_t; 136 137 /* 138 * Constants for Hardware ECC 139 */ 140 /* Reset Hardware ECC for read */ 141 #define NAND_ECC_READ 0 142 /* Reset Hardware ECC for write */ 143 #define NAND_ECC_WRITE 1 144 /* Enable Hardware ECC before syndrome is read back from flash */ 145 #define NAND_ECC_READSYN 2 146 147 /* Bit mask for flags passed to do_nand_read_ecc */ 148 #define NAND_GET_DEVICE 0x80 149 150 151 /* 152 * Option constants for bizarre disfunctionality and real 153 * features. 154 */ 155 /* Buswidth is 16 bit */ 156 #define NAND_BUSWIDTH_16 0x00000002 157 /* Device supports partial programming without padding */ 158 #define NAND_NO_PADDING 0x00000004 159 /* Chip has cache program function */ 160 #define NAND_CACHEPRG 0x00000008 161 /* Chip has copy back function */ 162 #define NAND_COPYBACK 0x00000010 163 /* 164 * Chip requires ready check on read (for auto-incremented sequential read). 165 * True only for small page devices; large page devices do not support 166 * autoincrement. 167 */ 168 #define NAND_NEED_READRDY 0x00000100 169 170 /* Chip does not allow subpage writes */ 171 #define NAND_NO_SUBPAGE_WRITE 0x00000200 172 173 /* Device is one of 'new' xD cards that expose fake nand command set */ 174 #define NAND_BROKEN_XD 0x00000400 175 176 /* Device behaves just like nand, but is readonly */ 177 #define NAND_ROM 0x00000800 178 179 /* Device supports subpage reads */ 180 #define NAND_SUBPAGE_READ 0x00001000 181 182 /* Options valid for Samsung large page devices */ 183 #define NAND_SAMSUNG_LP_OPTIONS NAND_CACHEPRG 184 185 /* Macros to identify the above */ 186 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG)) 187 #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ)) 188 189 /* Non chip related options */ 190 /* This option skips the bbt scan during initialization. */ 191 #define NAND_SKIP_BBTSCAN 0x00010000 192 /* 193 * This option is defined if the board driver allocates its own buffers 194 * (e.g. because it needs them DMA-coherent). 195 */ 196 #define NAND_OWN_BUFFERS 0x00020000 197 /* Chip may not exist, so silence any errors in scan */ 198 #define NAND_SCAN_SILENT_NODEV 0x00040000 199 /* 200 * Autodetect nand buswidth with readid/onfi. 201 * This suppose the driver will configure the hardware in 8 bits mode 202 * when calling nand_scan_ident, and update its configuration 203 * before calling nand_scan_tail. 204 */ 205 #define NAND_BUSWIDTH_AUTO 0x00080000 206 207 /* Options set by nand scan */ 208 /* bbt has already been read */ 209 #define NAND_BBT_SCANNED 0x40000000 210 /* Nand scan has allocated controller struct */ 211 #define NAND_CONTROLLER_ALLOC 0x80000000 212 213 /* Cell info constants */ 214 #define NAND_CI_CHIPNR_MSK 0x03 215 #define NAND_CI_CELLTYPE_MSK 0x0C 216 #define NAND_CI_CELLTYPE_SHIFT 2 217 218 /* Keep gcc happy */ 219 struct nand_chip; 220 221 /* ONFI features */ 222 #define ONFI_FEATURE_16_BIT_BUS (1 << 0) 223 #define ONFI_FEATURE_EXT_PARAM_PAGE (1 << 7) 224 225 /* ONFI timing mode, used in both asynchronous and synchronous mode */ 226 #define ONFI_TIMING_MODE_0 (1 << 0) 227 #define ONFI_TIMING_MODE_1 (1 << 1) 228 #define ONFI_TIMING_MODE_2 (1 << 2) 229 #define ONFI_TIMING_MODE_3 (1 << 3) 230 #define ONFI_TIMING_MODE_4 (1 << 4) 231 #define ONFI_TIMING_MODE_5 (1 << 5) 232 #define ONFI_TIMING_MODE_UNKNOWN (1 << 6) 233 234 /* ONFI feature address */ 235 #define ONFI_FEATURE_ADDR_TIMING_MODE 0x1 236 237 /* Vendor-specific feature address (Micron) */ 238 #define ONFI_FEATURE_ADDR_READ_RETRY 0x89 239 240 /* ONFI subfeature parameters length */ 241 #define ONFI_SUBFEATURE_PARAM_LEN 4 242 243 /* ONFI optional commands SET/GET FEATURES supported? */ 244 #define ONFI_OPT_CMD_SET_GET_FEATURES (1 << 2) 245 246 struct nand_onfi_params { 247 /* rev info and features block */ 248 /* 'O' 'N' 'F' 'I' */ 249 u8 sig[4]; 250 __le16 revision; 251 __le16 features; 252 __le16 opt_cmd; 253 u8 reserved0[2]; 254 __le16 ext_param_page_length; /* since ONFI 2.1 */ 255 u8 num_of_param_pages; /* since ONFI 2.1 */ 256 u8 reserved1[17]; 257 258 /* manufacturer information block */ 259 char manufacturer[12]; 260 char model[20]; 261 u8 jedec_id; 262 __le16 date_code; 263 u8 reserved2[13]; 264 265 /* memory organization block */ 266 __le32 byte_per_page; 267 __le16 spare_bytes_per_page; 268 __le32 data_bytes_per_ppage; 269 __le16 spare_bytes_per_ppage; 270 __le32 pages_per_block; 271 __le32 blocks_per_lun; 272 u8 lun_count; 273 u8 addr_cycles; 274 u8 bits_per_cell; 275 __le16 bb_per_lun; 276 __le16 block_endurance; 277 u8 guaranteed_good_blocks; 278 __le16 guaranteed_block_endurance; 279 u8 programs_per_page; 280 u8 ppage_attr; 281 u8 ecc_bits; 282 u8 interleaved_bits; 283 u8 interleaved_ops; 284 u8 reserved3[13]; 285 286 /* electrical parameter block */ 287 u8 io_pin_capacitance_max; 288 __le16 async_timing_mode; 289 __le16 program_cache_timing_mode; 290 __le16 t_prog; 291 __le16 t_bers; 292 __le16 t_r; 293 __le16 t_ccs; 294 __le16 src_sync_timing_mode; 295 __le16 src_ssync_features; 296 __le16 clk_pin_capacitance_typ; 297 __le16 io_pin_capacitance_typ; 298 __le16 input_pin_capacitance_typ; 299 u8 input_pin_capacitance_max; 300 u8 driver_strength_support; 301 __le16 t_int_r; 302 __le16 t_ald; 303 u8 reserved4[7]; 304 305 /* vendor */ 306 __le16 vendor_revision; 307 u8 vendor[88]; 308 309 __le16 crc; 310 } __packed; 311 312 #define ONFI_CRC_BASE 0x4F4E 313 314 /* Extended ECC information Block Definition (since ONFI 2.1) */ 315 struct onfi_ext_ecc_info { 316 u8 ecc_bits; 317 u8 codeword_size; 318 __le16 bb_per_lun; 319 __le16 block_endurance; 320 u8 reserved[2]; 321 } __packed; 322 323 #define ONFI_SECTION_TYPE_0 0 /* Unused section. */ 324 #define ONFI_SECTION_TYPE_1 1 /* for additional sections. */ 325 #define ONFI_SECTION_TYPE_2 2 /* for ECC information. */ 326 struct onfi_ext_section { 327 u8 type; 328 u8 length; 329 } __packed; 330 331 #define ONFI_EXT_SECTION_MAX 8 332 333 /* Extended Parameter Page Definition (since ONFI 2.1) */ 334 struct onfi_ext_param_page { 335 __le16 crc; 336 u8 sig[4]; /* 'E' 'P' 'P' 'S' */ 337 u8 reserved0[10]; 338 struct onfi_ext_section sections[ONFI_EXT_SECTION_MAX]; 339 340 /* 341 * The actual size of the Extended Parameter Page is in 342 * @ext_param_page_length of nand_onfi_params{}. 343 * The following are the variable length sections. 344 * So we do not add any fields below. Please see the ONFI spec. 345 */ 346 } __packed; 347 348 struct nand_onfi_vendor_micron { 349 u8 two_plane_read; 350 u8 read_cache; 351 u8 read_unique_id; 352 u8 dq_imped; 353 u8 dq_imped_num_settings; 354 u8 dq_imped_feat_addr; 355 u8 rb_pulldown_strength; 356 u8 rb_pulldown_strength_feat_addr; 357 u8 rb_pulldown_strength_num_settings; 358 u8 otp_mode; 359 u8 otp_page_start; 360 u8 otp_data_prot_addr; 361 u8 otp_num_pages; 362 u8 otp_feat_addr; 363 u8 read_retry_options; 364 u8 reserved[72]; 365 u8 param_revision; 366 } __packed; 367 368 struct jedec_ecc_info { 369 u8 ecc_bits; 370 u8 codeword_size; 371 __le16 bb_per_lun; 372 __le16 block_endurance; 373 u8 reserved[2]; 374 } __packed; 375 376 /* JEDEC features */ 377 #define JEDEC_FEATURE_16_BIT_BUS (1 << 0) 378 379 struct nand_jedec_params { 380 /* rev info and features block */ 381 /* 'J' 'E' 'S' 'D' */ 382 u8 sig[4]; 383 __le16 revision; 384 __le16 features; 385 u8 opt_cmd[3]; 386 __le16 sec_cmd; 387 u8 num_of_param_pages; 388 u8 reserved0[18]; 389 390 /* manufacturer information block */ 391 char manufacturer[12]; 392 char model[20]; 393 u8 jedec_id[6]; 394 u8 reserved1[10]; 395 396 /* memory organization block */ 397 __le32 byte_per_page; 398 __le16 spare_bytes_per_page; 399 u8 reserved2[6]; 400 __le32 pages_per_block; 401 __le32 blocks_per_lun; 402 u8 lun_count; 403 u8 addr_cycles; 404 u8 bits_per_cell; 405 u8 programs_per_page; 406 u8 multi_plane_addr; 407 u8 multi_plane_op_attr; 408 u8 reserved3[38]; 409 410 /* electrical parameter block */ 411 __le16 async_sdr_speed_grade; 412 __le16 toggle_ddr_speed_grade; 413 __le16 sync_ddr_speed_grade; 414 u8 async_sdr_features; 415 u8 toggle_ddr_features; 416 u8 sync_ddr_features; 417 __le16 t_prog; 418 __le16 t_bers; 419 __le16 t_r; 420 __le16 t_r_multi_plane; 421 __le16 t_ccs; 422 __le16 io_pin_capacitance_typ; 423 __le16 input_pin_capacitance_typ; 424 __le16 clk_pin_capacitance_typ; 425 u8 driver_strength_support; 426 __le16 t_ald; 427 u8 reserved4[36]; 428 429 /* ECC and endurance block */ 430 u8 guaranteed_good_blocks; 431 __le16 guaranteed_block_endurance; 432 struct jedec_ecc_info ecc_info[4]; 433 u8 reserved5[29]; 434 435 /* reserved */ 436 u8 reserved6[148]; 437 438 /* vendor */ 439 __le16 vendor_rev_num; 440 u8 reserved7[88]; 441 442 /* CRC for Parameter Page */ 443 __le16 crc; 444 } __packed; 445 446 /** 447 * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independent devices 448 * @lock: protection lock 449 * @active: the mtd device which holds the controller currently 450 * @wq: wait queue to sleep on if a NAND operation is in 451 * progress used instead of the per chip wait queue 452 * when a hw controller is available. 453 */ 454 struct nand_hw_control { 455 spinlock_t lock; 456 struct nand_chip *active; 457 }; 458 459 /** 460 * struct nand_ecc_ctrl - Control structure for ECC 461 * @mode: ECC mode 462 * @steps: number of ECC steps per page 463 * @size: data bytes per ECC step 464 * @bytes: ECC bytes per step 465 * @strength: max number of correctible bits per ECC step 466 * @total: total number of ECC bytes per page 467 * @prepad: padding information for syndrome based ECC generators 468 * @postpad: padding information for syndrome based ECC generators 469 * @layout: ECC layout control struct pointer 470 * @priv: pointer to private ECC control data 471 * @hwctl: function to control hardware ECC generator. Must only 472 * be provided if an hardware ECC is available 473 * @calculate: function for ECC calculation or readback from ECC hardware 474 * @correct: function for ECC correction, matching to ECC generator (sw/hw) 475 * @read_page_raw: function to read a raw page without ECC 476 * @write_page_raw: function to write a raw page without ECC 477 * @read_page: function to read a page according to the ECC generator 478 * requirements; returns maximum number of bitflips corrected in 479 * any single ECC step, 0 if bitflips uncorrectable, -EIO hw error 480 * @read_subpage: function to read parts of the page covered by ECC; 481 * returns same as read_page() 482 * @write_subpage: function to write parts of the page covered by ECC. 483 * @write_page: function to write a page according to the ECC generator 484 * requirements. 485 * @write_oob_raw: function to write chip OOB data without ECC 486 * @read_oob_raw: function to read chip OOB data without ECC 487 * @read_oob: function to read chip OOB data 488 * @write_oob: function to write chip OOB data 489 */ 490 struct nand_ecc_ctrl { 491 nand_ecc_modes_t mode; 492 int steps; 493 int size; 494 int bytes; 495 int total; 496 int strength; 497 int prepad; 498 int postpad; 499 struct nand_ecclayout *layout; 500 void *priv; 501 void (*hwctl)(struct mtd_info *mtd, int mode); 502 int (*calculate)(struct mtd_info *mtd, const uint8_t *dat, 503 uint8_t *ecc_code); 504 int (*correct)(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc, 505 uint8_t *calc_ecc); 506 int (*read_page_raw)(struct mtd_info *mtd, struct nand_chip *chip, 507 uint8_t *buf, int oob_required, int page); 508 int (*write_page_raw)(struct mtd_info *mtd, struct nand_chip *chip, 509 const uint8_t *buf, int oob_required); 510 int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, 511 uint8_t *buf, int oob_required, int page); 512 int (*read_subpage)(struct mtd_info *mtd, struct nand_chip *chip, 513 uint32_t offs, uint32_t len, uint8_t *buf, int page); 514 int (*write_subpage)(struct mtd_info *mtd, struct nand_chip *chip, 515 uint32_t offset, uint32_t data_len, 516 const uint8_t *data_buf, int oob_required); 517 int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, 518 const uint8_t *buf, int oob_required); 519 int (*write_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip, 520 int page); 521 int (*read_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip, 522 int page); 523 int (*read_oob)(struct mtd_info *mtd, struct nand_chip *chip, int page); 524 int (*write_oob)(struct mtd_info *mtd, struct nand_chip *chip, 525 int page); 526 }; 527 528 /** 529 * struct nand_buffers - buffer structure for read/write 530 * @ecccalc: buffer pointer for calculated ECC, size is oobsize. 531 * @ecccode: buffer pointer for ECC read from flash, size is oobsize. 532 * @databuf: buffer pointer for data, size is (page size + oobsize). 533 * 534 * Do not change the order of buffers. databuf and oobrbuf must be in 535 * consecutive order. 536 */ 537 struct nand_buffers { 538 uint8_t ecccalc[ALIGN(NAND_MAX_OOBSIZE, ARCH_DMA_MINALIGN)]; 539 uint8_t ecccode[ALIGN(NAND_MAX_OOBSIZE, ARCH_DMA_MINALIGN)]; 540 uint8_t databuf[ALIGN(NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE, 541 ARCH_DMA_MINALIGN)]; 542 }; 543 544 /** 545 * struct nand_chip - NAND Private Flash Chip Data 546 * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the 547 * flash device 548 * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the 549 * flash device. 550 * @read_byte: [REPLACEABLE] read one byte from the chip 551 * @read_word: [REPLACEABLE] read one word from the chip 552 * @write_byte: [REPLACEABLE] write a single byte to the chip on the 553 * low 8 I/O lines 554 * @write_buf: [REPLACEABLE] write data from the buffer to the chip 555 * @read_buf: [REPLACEABLE] read data from the chip into the buffer 556 * @select_chip: [REPLACEABLE] select chip nr 557 * @block_bad: [REPLACEABLE] check if a block is bad, using OOB markers 558 * @block_markbad: [REPLACEABLE] mark a block bad 559 * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific function for controlling 560 * ALE/CLE/nCE. Also used to write command and address 561 * @init_size: [BOARDSPECIFIC] hardwarespecific function for setting 562 * mtd->oobsize, mtd->writesize and so on. 563 * @id_data contains the 8 bytes values of NAND_CMD_READID. 564 * Return with the bus width. 565 * @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accessing 566 * device ready/busy line. If set to NULL no access to 567 * ready/busy is available and the ready/busy information 568 * is read from the chip status register. 569 * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing 570 * commands to the chip. 571 * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on 572 * ready. 573 * @setup_read_retry: [FLASHSPECIFIC] flash (vendor) specific function for 574 * setting the read-retry mode. Mostly needed for MLC NAND. 575 * @ecc: [BOARDSPECIFIC] ECC control structure 576 * @buffers: buffer structure for read/write 577 * @hwcontrol: platform-specific hardware control structure 578 * @erase_cmd: [INTERN] erase command write function, selectable due 579 * to AND support. 580 * @scan_bbt: [REPLACEABLE] function to scan bad block table 581 * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transferring 582 * data from array to read regs (tR). 583 * @state: [INTERN] the current state of the NAND device 584 * @oob_poi: "poison value buffer," used for laying out OOB data 585 * before writing 586 * @page_shift: [INTERN] number of address bits in a page (column 587 * address bits). 588 * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock 589 * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry 590 * @chip_shift: [INTERN] number of address bits in one chip 591 * @options: [BOARDSPECIFIC] various chip options. They can partly 592 * be set to inform nand_scan about special functionality. 593 * See the defines for further explanation. 594 * @bbt_options: [INTERN] bad block specific options. All options used 595 * here must come from bbm.h. By default, these options 596 * will be copied to the appropriate nand_bbt_descr's. 597 * @badblockpos: [INTERN] position of the bad block marker in the oob 598 * area. 599 * @badblockbits: [INTERN] minimum number of set bits in a good block's 600 * bad block marker position; i.e., BBM == 11110111b is 601 * not bad when badblockbits == 7 602 * @bits_per_cell: [INTERN] number of bits per cell. i.e., 1 means SLC. 603 * @ecc_strength_ds: [INTERN] ECC correctability from the datasheet. 604 * Minimum amount of bit errors per @ecc_step_ds guaranteed 605 * to be correctable. If unknown, set to zero. 606 * @ecc_step_ds: [INTERN] ECC step required by the @ecc_strength_ds, 607 * also from the datasheet. It is the recommended ECC step 608 * size, if known; if unknown, set to zero. 609 * @numchips: [INTERN] number of physical chips 610 * @chipsize: [INTERN] the size of one chip for multichip arrays 611 * @pagemask: [INTERN] page number mask = number of (pages / chip) - 1 612 * @pagebuf: [INTERN] holds the pagenumber which is currently in 613 * data_buf. 614 * @pagebuf_bitflips: [INTERN] holds the bitflip count for the page which is 615 * currently in data_buf. 616 * @subpagesize: [INTERN] holds the subpagesize 617 * @onfi_version: [INTERN] holds the chip ONFI version (BCD encoded), 618 * non 0 if ONFI supported. 619 * @jedec_version: [INTERN] holds the chip JEDEC version (BCD encoded), 620 * non 0 if JEDEC supported. 621 * @onfi_params: [INTERN] holds the ONFI page parameter when ONFI is 622 * supported, 0 otherwise. 623 * @jedec_params: [INTERN] holds the JEDEC parameter page when JEDEC is 624 * supported, 0 otherwise. 625 * @read_retries: [INTERN] the number of read retry modes supported 626 * @onfi_set_features: [REPLACEABLE] set the features for ONFI nand 627 * @onfi_get_features: [REPLACEABLE] get the features for ONFI nand 628 * @bbt: [INTERN] bad block table pointer 629 * @bbt_td: [REPLACEABLE] bad block table descriptor for flash 630 * lookup. 631 * @bbt_md: [REPLACEABLE] bad block table mirror descriptor 632 * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial 633 * bad block scan. 634 * @controller: [REPLACEABLE] a pointer to a hardware controller 635 * structure which is shared among multiple independent 636 * devices. 637 * @priv: [OPTIONAL] pointer to private chip data 638 * @errstat: [OPTIONAL] hardware specific function to perform 639 * additional error status checks (determine if errors are 640 * correctable). 641 * @write_page: [REPLACEABLE] High-level page write function 642 */ 643 644 struct nand_chip { 645 void __iomem *IO_ADDR_R; 646 void __iomem *IO_ADDR_W; 647 648 uint8_t (*read_byte)(struct mtd_info *mtd); 649 u16 (*read_word)(struct mtd_info *mtd); 650 void (*write_byte)(struct mtd_info *mtd, uint8_t byte); 651 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); 652 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len); 653 void (*select_chip)(struct mtd_info *mtd, int chip); 654 int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip); 655 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs); 656 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl); 657 int (*init_size)(struct mtd_info *mtd, struct nand_chip *this, 658 u8 *id_data); 659 int (*dev_ready)(struct mtd_info *mtd); 660 void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, 661 int page_addr); 662 int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this); 663 void (*erase_cmd)(struct mtd_info *mtd, int page); 664 int (*scan_bbt)(struct mtd_info *mtd); 665 int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, 666 int status, int page); 667 int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, 668 uint32_t offset, int data_len, const uint8_t *buf, 669 int oob_required, int page, int cached, int raw); 670 int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip, 671 int feature_addr, uint8_t *subfeature_para); 672 int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip, 673 int feature_addr, uint8_t *subfeature_para); 674 int (*setup_read_retry)(struct mtd_info *mtd, int retry_mode); 675 676 int chip_delay; 677 unsigned int options; 678 unsigned int bbt_options; 679 680 int page_shift; 681 int phys_erase_shift; 682 int bbt_erase_shift; 683 int chip_shift; 684 int numchips; 685 uint64_t chipsize; 686 int pagemask; 687 int pagebuf; 688 unsigned int pagebuf_bitflips; 689 int subpagesize; 690 uint8_t bits_per_cell; 691 uint16_t ecc_strength_ds; 692 uint16_t ecc_step_ds; 693 int badblockpos; 694 int badblockbits; 695 696 int onfi_version; 697 int jedec_version; 698 #ifdef CONFIG_SYS_NAND_ONFI_DETECTION 699 struct nand_onfi_params onfi_params; 700 #endif 701 struct nand_jedec_params jedec_params; 702 703 int read_retries; 704 705 flstate_t state; 706 707 uint8_t *oob_poi; 708 struct nand_hw_control *controller; 709 struct nand_ecclayout *ecclayout; 710 711 struct nand_ecc_ctrl ecc; 712 struct nand_buffers *buffers; 713 struct nand_hw_control hwcontrol; 714 715 uint8_t *bbt; 716 struct nand_bbt_descr *bbt_td; 717 struct nand_bbt_descr *bbt_md; 718 719 struct nand_bbt_descr *badblock_pattern; 720 721 void *priv; 722 }; 723 724 /* 725 * NAND Flash Manufacturer ID Codes 726 */ 727 #define NAND_MFR_TOSHIBA 0x98 728 #define NAND_MFR_SAMSUNG 0xec 729 #define NAND_MFR_FUJITSU 0x04 730 #define NAND_MFR_NATIONAL 0x8f 731 #define NAND_MFR_RENESAS 0x07 732 #define NAND_MFR_STMICRO 0x20 733 #define NAND_MFR_HYNIX 0xad 734 #define NAND_MFR_MICRON 0x2c 735 #define NAND_MFR_AMD 0x01 736 #define NAND_MFR_MACRONIX 0xc2 737 #define NAND_MFR_EON 0x92 738 #define NAND_MFR_SANDISK 0x45 739 #define NAND_MFR_INTEL 0x89 740 741 /* The maximum expected count of bytes in the NAND ID sequence */ 742 #define NAND_MAX_ID_LEN 8 743 744 /* 745 * A helper for defining older NAND chips where the second ID byte fully 746 * defined the chip, including the geometry (chip size, eraseblock size, page 747 * size). All these chips have 512 bytes NAND page size. 748 */ 749 #define LEGACY_ID_NAND(nm, devid, chipsz, erasesz, opts) \ 750 { .name = (nm), {{ .dev_id = (devid) }}, .pagesize = 512, \ 751 .chipsize = (chipsz), .erasesize = (erasesz), .options = (opts) } 752 753 /* 754 * A helper for defining newer chips which report their page size and 755 * eraseblock size via the extended ID bytes. 756 * 757 * The real difference between LEGACY_ID_NAND and EXTENDED_ID_NAND is that with 758 * EXTENDED_ID_NAND, manufacturers overloaded the same device ID so that the 759 * device ID now only represented a particular total chip size (and voltage, 760 * buswidth), and the page size, eraseblock size, and OOB size could vary while 761 * using the same device ID. 762 */ 763 #define EXTENDED_ID_NAND(nm, devid, chipsz, opts) \ 764 { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \ 765 .options = (opts) } 766 767 #define NAND_ECC_INFO(_strength, _step) \ 768 { .strength_ds = (_strength), .step_ds = (_step) } 769 #define NAND_ECC_STRENGTH(type) ((type)->ecc.strength_ds) 770 #define NAND_ECC_STEP(type) ((type)->ecc.step_ds) 771 772 /** 773 * struct nand_flash_dev - NAND Flash Device ID Structure 774 * @name: a human-readable name of the NAND chip 775 * @dev_id: the device ID (the second byte of the full chip ID array) 776 * @mfr_id: manufecturer ID part of the full chip ID array (refers the same 777 * memory address as @id[0]) 778 * @dev_id: device ID part of the full chip ID array (refers the same memory 779 * address as @id[1]) 780 * @id: full device ID array 781 * @pagesize: size of the NAND page in bytes; if 0, then the real page size (as 782 * well as the eraseblock size) is determined from the extended NAND 783 * chip ID array) 784 * @chipsize: total chip size in MiB 785 * @erasesize: eraseblock size in bytes (determined from the extended ID if 0) 786 * @options: stores various chip bit options 787 * @id_len: The valid length of the @id. 788 * @oobsize: OOB size 789 * @ecc.strength_ds: The ECC correctability from the datasheet, same as the 790 * @ecc_strength_ds in nand_chip{}. 791 * @ecc.step_ds: The ECC step required by the @ecc.strength_ds, same as the 792 * @ecc_step_ds in nand_chip{}, also from the datasheet. 793 * For example, the "4bit ECC for each 512Byte" can be set with 794 * NAND_ECC_INFO(4, 512). 795 */ 796 struct nand_flash_dev { 797 char *name; 798 union { 799 struct { 800 uint8_t mfr_id; 801 uint8_t dev_id; 802 }; 803 uint8_t id[NAND_MAX_ID_LEN]; 804 }; 805 unsigned int pagesize; 806 unsigned int chipsize; 807 unsigned int erasesize; 808 unsigned int options; 809 uint16_t id_len; 810 uint16_t oobsize; 811 struct { 812 uint16_t strength_ds; 813 uint16_t step_ds; 814 } ecc; 815 }; 816 817 /** 818 * struct nand_manufacturers - NAND Flash Manufacturer ID Structure 819 * @name: Manufacturer name 820 * @id: manufacturer ID code of device. 821 */ 822 struct nand_manufacturers { 823 int id; 824 char *name; 825 }; 826 827 extern struct nand_flash_dev nand_flash_ids[]; 828 extern struct nand_manufacturers nand_manuf_ids[]; 829 830 extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd); 831 extern int nand_default_bbt(struct mtd_info *mtd); 832 extern int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs); 833 extern int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs); 834 extern int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt); 835 extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, 836 int allowbbt); 837 extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len, 838 size_t *retlen, uint8_t *buf); 839 840 /* 841 * Constants for oob configuration 842 */ 843 #define NAND_SMALL_BADBLOCK_POS 5 844 #define NAND_LARGE_BADBLOCK_POS 0 845 846 /** 847 * struct platform_nand_chip - chip level device structure 848 * @nr_chips: max. number of chips to scan for 849 * @chip_offset: chip number offset 850 * @nr_partitions: number of partitions pointed to by partitions (or zero) 851 * @partitions: mtd partition list 852 * @chip_delay: R/B delay value in us 853 * @options: Option flags, e.g. 16bit buswidth 854 * @bbt_options: BBT option flags, e.g. NAND_BBT_USE_FLASH 855 * @ecclayout: ECC layout info structure 856 * @part_probe_types: NULL-terminated array of probe types 857 */ 858 struct platform_nand_chip { 859 int nr_chips; 860 int chip_offset; 861 int nr_partitions; 862 struct mtd_partition *partitions; 863 struct nand_ecclayout *ecclayout; 864 int chip_delay; 865 unsigned int options; 866 unsigned int bbt_options; 867 const char **part_probe_types; 868 }; 869 870 /* Keep gcc happy */ 871 struct platform_device; 872 873 /** 874 * struct platform_nand_ctrl - controller level device structure 875 * @probe: platform specific function to probe/setup hardware 876 * @remove: platform specific function to remove/teardown hardware 877 * @hwcontrol: platform specific hardware control structure 878 * @dev_ready: platform specific function to read ready/busy pin 879 * @select_chip: platform specific chip select function 880 * @cmd_ctrl: platform specific function for controlling 881 * ALE/CLE/nCE. Also used to write command and address 882 * @write_buf: platform specific function for write buffer 883 * @read_buf: platform specific function for read buffer 884 * @read_byte: platform specific function to read one byte from chip 885 * @priv: private data to transport driver specific settings 886 * 887 * All fields are optional and depend on the hardware driver requirements 888 */ 889 struct platform_nand_ctrl { 890 int (*probe)(struct platform_device *pdev); 891 void (*remove)(struct platform_device *pdev); 892 void (*hwcontrol)(struct mtd_info *mtd, int cmd); 893 int (*dev_ready)(struct mtd_info *mtd); 894 void (*select_chip)(struct mtd_info *mtd, int chip); 895 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl); 896 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); 897 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len); 898 unsigned char (*read_byte)(struct mtd_info *mtd); 899 void *priv; 900 }; 901 902 /** 903 * struct platform_nand_data - container structure for platform-specific data 904 * @chip: chip level chip structure 905 * @ctrl: controller level device structure 906 */ 907 struct platform_nand_data { 908 struct platform_nand_chip chip; 909 struct platform_nand_ctrl ctrl; 910 }; 911 912 /* Some helpers to access the data structures */ 913 static inline 914 struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd) 915 { 916 struct nand_chip *chip = mtd->priv; 917 918 return chip->priv; 919 } 920 921 #ifdef CONFIG_SYS_NAND_ONFI_DETECTION 922 /* return the supported features. */ 923 static inline int onfi_feature(struct nand_chip *chip) 924 { 925 return chip->onfi_version ? le16_to_cpu(chip->onfi_params.features) : 0; 926 } 927 928 /* return the supported asynchronous timing mode. */ 929 static inline int onfi_get_async_timing_mode(struct nand_chip *chip) 930 { 931 if (!chip->onfi_version) 932 return ONFI_TIMING_MODE_UNKNOWN; 933 return le16_to_cpu(chip->onfi_params.async_timing_mode); 934 } 935 936 /* return the supported synchronous timing mode. */ 937 static inline int onfi_get_sync_timing_mode(struct nand_chip *chip) 938 { 939 if (!chip->onfi_version) 940 return ONFI_TIMING_MODE_UNKNOWN; 941 return le16_to_cpu(chip->onfi_params.src_sync_timing_mode); 942 } 943 #endif 944 945 /* 946 * Check if it is a SLC nand. 947 * The !nand_is_slc() can be used to check the MLC/TLC nand chips. 948 * We do not distinguish the MLC and TLC now. 949 */ 950 static inline bool nand_is_slc(struct nand_chip *chip) 951 { 952 return chip->bits_per_cell == 1; 953 } 954 955 /** 956 * Check if the opcode's address should be sent only on the lower 8 bits 957 * @command: opcode to check 958 */ 959 static inline int nand_opcode_8bits(unsigned int command) 960 { 961 switch (command) { 962 case NAND_CMD_READID: 963 case NAND_CMD_PARAM: 964 case NAND_CMD_GET_FEATURES: 965 case NAND_CMD_SET_FEATURES: 966 return 1; 967 default: 968 break; 969 } 970 return 0; 971 } 972 973 /* return the supported JEDEC features. */ 974 static inline int jedec_feature(struct nand_chip *chip) 975 { 976 return chip->jedec_version ? le16_to_cpu(chip->jedec_params.features) 977 : 0; 978 } 979 980 /* Standard NAND functions from nand_base.c */ 981 void nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len); 982 void nand_write_buf16(struct mtd_info *mtd, const uint8_t *buf, int len); 983 void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len); 984 void nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int len); 985 uint8_t nand_read_byte(struct mtd_info *mtd); 986 #endif /* __LINUX_MTD_NAND_H */ 987