2 * linux/include/linux/mtd/nand.h
4 * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
5 * Steven J. Hill <sjhill@realitydiluted.com>
6 * Thomas Gleixner <tglx@linutronix.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 * Contains standard defines and IDs for NAND flash devices
18 #ifndef __LINUX_MTD_NAND_H
19 #define __LINUX_MTD_NAND_H
21 #include <linux/wait.h>
22 #include <linux/spinlock.h>
23 #include <linux/mtd/mtd.h>
24 #include <linux/mtd/flashchip.h>
25 #include <linux/mtd/bbm.h>
28 struct nand_flash_dev;
29 /* Scan and identify a NAND device */
30 extern int nand_scan(struct mtd_info *mtd, int max_chips);
32 * Separate phases of nand_scan(), allowing board driver to intervene
33 * and override command or ECC setup according to flash type.
35 extern int nand_scan_ident(struct mtd_info *mtd, int max_chips,
36 struct nand_flash_dev *table);
37 extern int nand_scan_tail(struct mtd_info *mtd);
39 /* Free resources held by the NAND device */
40 extern void nand_release(struct mtd_info *mtd);
42 /* Internal helper for board drivers which need to override command function */
43 extern void nand_wait_ready(struct mtd_info *mtd);
45 /* locks all blockes present in the device */
46 extern int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
48 /* unlocks specified locked blockes */
49 extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
51 /* The maximum number of NAND chips in an array */
52 #define NAND_MAX_CHIPS 8
55 * This constant declares the max. oobsize / page, which
56 * is supported now. If you add a chip with bigger oobsize/page
57 * adjust this accordingly.
59 #define NAND_MAX_OOBSIZE 576
60 #define NAND_MAX_PAGESIZE 8192
63 * Constants for hardware specific CLE/ALE/NCE function
65 * These are bits which can be or'ed to set/clear multiple
68 /* Select the chip by setting nCE to low */
70 /* Select the command latch by setting CLE to high */
72 /* Select the address latch by setting ALE to high */
75 #define NAND_CTRL_CLE (NAND_NCE | NAND_CLE)
76 #define NAND_CTRL_ALE (NAND_NCE | NAND_ALE)
77 #define NAND_CTRL_CHANGE 0x80
80 * Standard NAND flash commands
82 #define NAND_CMD_READ0 0
83 #define NAND_CMD_READ1 1
84 #define NAND_CMD_RNDOUT 5
85 #define NAND_CMD_PAGEPROG 0x10
86 #define NAND_CMD_READOOB 0x50
87 #define NAND_CMD_ERASE1 0x60
88 #define NAND_CMD_STATUS 0x70
89 #define NAND_CMD_STATUS_MULTI 0x71
90 #define NAND_CMD_SEQIN 0x80
91 #define NAND_CMD_RNDIN 0x85
92 #define NAND_CMD_READID 0x90
93 #define NAND_CMD_ERASE2 0xd0
94 #define NAND_CMD_PARAM 0xec
95 #define NAND_CMD_RESET 0xff
97 #define NAND_CMD_LOCK 0x2a
98 #define NAND_CMD_UNLOCK1 0x23
99 #define NAND_CMD_UNLOCK2 0x24
101 /* Extended commands for large page devices */
102 #define NAND_CMD_READSTART 0x30
103 #define NAND_CMD_RNDOUTSTART 0xE0
104 #define NAND_CMD_CACHEDPROG 0x15
106 /* Extended commands for AG-AND device */
108 * Note: the command for NAND_CMD_DEPLETE1 is really 0x00 but
109 * there is no way to distinguish that from NAND_CMD_READ0
110 * until the remaining sequence of commands has been completed
111 * so add a high order bit and mask it off in the command.
113 #define NAND_CMD_DEPLETE1 0x100
114 #define NAND_CMD_DEPLETE2 0x38
115 #define NAND_CMD_STATUS_MULTI 0x71
116 #define NAND_CMD_STATUS_ERROR 0x72
117 /* multi-bank error status (banks 0-3) */
118 #define NAND_CMD_STATUS_ERROR0 0x73
119 #define NAND_CMD_STATUS_ERROR1 0x74
120 #define NAND_CMD_STATUS_ERROR2 0x75
121 #define NAND_CMD_STATUS_ERROR3 0x76
122 #define NAND_CMD_STATUS_RESET 0x7f
123 #define NAND_CMD_STATUS_CLEAR 0xff
125 #define NAND_CMD_NONE -1
128 #define NAND_STATUS_FAIL 0x01
129 #define NAND_STATUS_FAIL_N1 0x02
130 #define NAND_STATUS_TRUE_READY 0x20
131 #define NAND_STATUS_READY 0x40
132 #define NAND_STATUS_WP 0x80
135 * Constants for ECC_MODES
141 NAND_ECC_HW_SYNDROME,
142 NAND_ECC_HW_OOB_FIRST,
147 * Constants for Hardware ECC
149 /* Reset Hardware ECC for read */
150 #define NAND_ECC_READ 0
151 /* Reset Hardware ECC for write */
152 #define NAND_ECC_WRITE 1
153 /* Enable Hardware ECC before syndrom is read back from flash */
154 #define NAND_ECC_READSYN 2
156 /* Bit mask for flags passed to do_nand_read_ecc */
157 #define NAND_GET_DEVICE 0x80
161 * Option constants for bizarre disfunctionality and real
164 /* Chip can not auto increment pages */
165 #define NAND_NO_AUTOINCR 0x00000001
166 /* Buswitdh is 16 bit */
167 #define NAND_BUSWIDTH_16 0x00000002
168 /* Device supports partial programming without padding */
169 #define NAND_NO_PADDING 0x00000004
170 /* Chip has cache program function */
171 #define NAND_CACHEPRG 0x00000008
172 /* Chip has copy back function */
173 #define NAND_COPYBACK 0x00000010
175 * AND Chip which has 4 banks and a confusing page / block
176 * assignment. See Renesas datasheet for further information.
178 #define NAND_IS_AND 0x00000020
180 * Chip has a array of 4 pages which can be read without
181 * additional ready /busy waits.
183 #define NAND_4PAGE_ARRAY 0x00000040
185 * Chip requires that BBT is periodically rewritten to prevent
186 * bits from adjacent blocks from 'leaking' in altering data.
187 * This happens with the Renesas AG-AND chips, possibly others.
189 #define BBT_AUTO_REFRESH 0x00000080
191 * Chip does not require ready check on read. True
192 * for all large page devices, as they do not support
195 #define NAND_NO_READRDY 0x00000100
196 /* Chip does not allow subpage writes */
197 #define NAND_NO_SUBPAGE_WRITE 0x00000200
199 /* Device is one of 'new' xD cards that expose fake nand command set */
200 #define NAND_BROKEN_XD 0x00000400
202 /* Device behaves just like nand, but is readonly */
203 #define NAND_ROM 0x00000800
205 /* Options valid for Samsung large page devices */
206 #define NAND_SAMSUNG_LP_OPTIONS \
207 (NAND_NO_PADDING | NAND_CACHEPRG | NAND_COPYBACK)
209 /* Macros to identify the above */
210 #define NAND_CANAUTOINCR(chip) (!(chip->options & NAND_NO_AUTOINCR))
211 #define NAND_MUST_PAD(chip) (!(chip->options & NAND_NO_PADDING))
212 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
213 #define NAND_HAS_COPYBACK(chip) ((chip->options & NAND_COPYBACK))
214 /* Large page NAND with SOFT_ECC should support subpage reads */
215 #define NAND_SUBPAGE_READ(chip) ((chip->ecc.mode == NAND_ECC_SOFT) \
216 && (chip->page_shift > 9))
218 /* Mask to zero out the chip options, which come from the id table */
219 #define NAND_CHIPOPTIONS_MSK (0x0000ffff & ~NAND_NO_AUTOINCR)
221 /* Non chip related options */
222 /* This option skips the bbt scan during initialization. */
223 #define NAND_SKIP_BBTSCAN 0x00020000
225 * This option is defined if the board driver allocates its own buffers
226 * (e.g. because it needs them DMA-coherent).
228 #define NAND_OWN_BUFFERS 0x00040000
229 /* Chip may not exist, so silence any errors in scan */
230 #define NAND_SCAN_SILENT_NODEV 0x00080000
231 /* Create an empty BBT with no vendor information if the BBT is available */
232 #define NAND_CREATE_EMPTY_BBT 0x01000000
234 /* Options set by nand scan */
235 /* Nand scan has allocated controller struct */
236 #define NAND_CONTROLLER_ALLOC 0x80000000
238 /* Cell info constants */
239 #define NAND_CI_CHIPNR_MSK 0x03
240 #define NAND_CI_CELLTYPE_MSK 0x0C
245 struct nand_onfi_params {
246 /* rev info and features block */
247 /* 'O' 'N' 'F' 'I' */
254 /* manufacturer information block */
255 char manufacturer[12];
261 /* memory organization block */
262 __le32 byte_per_page;
263 __le16 spare_bytes_per_page;
264 __le32 data_bytes_per_ppage;
265 __le16 spare_bytes_per_ppage;
266 __le32 pages_per_block;
267 __le32 blocks_per_lun;
272 __le16 block_endurance;
273 u8 guaranteed_good_blocks;
274 __le16 guaranteed_block_endurance;
275 u8 programs_per_page;
282 /* electrical parameter block */
283 u8 io_pin_capacitance_max;
284 __le16 async_timing_mode;
285 __le16 program_cache_timing_mode;
290 __le16 src_sync_timing_mode;
291 __le16 src_ssync_features;
292 __le16 clk_pin_capacitance_typ;
293 __le16 io_pin_capacitance_typ;
294 __le16 input_pin_capacitance_typ;
295 u8 input_pin_capacitance_max;
296 u8 driver_strenght_support;
305 } __attribute__((packed));
307 #define ONFI_CRC_BASE 0x4F4E
310 * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independent devices
311 * @lock: protection lock
312 * @active: the mtd device which holds the controller currently
313 * @wq: wait queue to sleep on if a NAND operation is in
314 * progress used instead of the per chip wait queue
315 * when a hw controller is available.
317 struct nand_hw_control {
319 struct nand_chip *active;
320 wait_queue_head_t wq;
324 * struct nand_ecc_ctrl - Control structure for ecc
326 * @steps: number of ecc steps per page
327 * @size: data bytes per ecc step
328 * @bytes: ecc bytes per step
329 * @total: total number of ecc bytes per page
330 * @prepad: padding information for syndrome based ecc generators
331 * @postpad: padding information for syndrome based ecc generators
332 * @layout: ECC layout control struct pointer
333 * @priv: pointer to private ecc control data
334 * @hwctl: function to control hardware ecc generator. Must only
335 * be provided if an hardware ECC is available
336 * @calculate: function for ecc calculation or readback from ecc hardware
337 * @correct: function for ecc correction, matching to ecc generator (sw/hw)
338 * @read_page_raw: function to read a raw page without ECC
339 * @write_page_raw: function to write a raw page without ECC
340 * @read_page: function to read a page according to the ecc generator
342 * @read_subpage: function to read parts of the page covered by ECC.
343 * @write_page: function to write a page according to the ecc generator
345 * @read_oob: function to read chip OOB data
346 * @write_oob: function to write chip OOB data
348 struct nand_ecc_ctrl {
349 nand_ecc_modes_t mode;
356 struct nand_ecclayout *layout;
358 void (*hwctl)(struct mtd_info *mtd, int mode);
359 int (*calculate)(struct mtd_info *mtd, const uint8_t *dat,
361 int (*correct)(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc,
363 int (*read_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
364 uint8_t *buf, int page);
365 void (*write_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
367 int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip,
368 uint8_t *buf, int page);
369 int (*read_subpage)(struct mtd_info *mtd, struct nand_chip *chip,
370 uint32_t offs, uint32_t len, uint8_t *buf);
371 void (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
373 int (*read_oob)(struct mtd_info *mtd, struct nand_chip *chip, int page,
375 int (*write_oob)(struct mtd_info *mtd, struct nand_chip *chip,
380 * struct nand_buffers - buffer structure for read/write
381 * @ecccalc: buffer for calculated ecc
382 * @ecccode: buffer for ecc read from flash
383 * @databuf: buffer for data - dynamically sized
385 * Do not change the order of buffers. databuf and oobrbuf must be in
388 struct nand_buffers {
389 uint8_t ecccalc[NAND_MAX_OOBSIZE];
390 uint8_t ecccode[NAND_MAX_OOBSIZE];
391 uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE];
395 * struct nand_chip - NAND Private Flash Chip Data
396 * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the
398 * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the
400 * @read_byte: [REPLACEABLE] read one byte from the chip
401 * @read_word: [REPLACEABLE] read one word from the chip
402 * @write_buf: [REPLACEABLE] write data from the buffer to the chip
403 * @read_buf: [REPLACEABLE] read data from the chip into the buffer
404 * @verify_buf: [REPLACEABLE] verify buffer contents against the chip
406 * @select_chip: [REPLACEABLE] select chip nr
407 * @block_bad: [REPLACEABLE] check, if the block is bad
408 * @block_markbad: [REPLACEABLE] mark the block bad
409 * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific function for controlling
410 * ALE/CLE/nCE. Also used to write command and address
411 * @init_size: [BOARDSPECIFIC] hardwarespecific function for setting
412 * mtd->oobsize, mtd->writesize and so on.
413 * @id_data contains the 8 bytes values of NAND_CMD_READID.
414 * Return with the bus width.
415 * @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accesing
416 * device ready/busy line. If set to NULL no access to
417 * ready/busy is available and the ready/busy information
418 * is read from the chip status register.
419 * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing
420 * commands to the chip.
421 * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on
423 * @ecc: [BOARDSPECIFIC] ecc control ctructure
424 * @buffers: buffer structure for read/write
425 * @hwcontrol: platform-specific hardware control structure
426 * @ops: oob operation operands
427 * @erase_cmd: [INTERN] erase command write function, selectable due
429 * @scan_bbt: [REPLACEABLE] function to scan bad block table
430 * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transferring
431 * data from array to read regs (tR).
432 * @state: [INTERN] the current state of the NAND device
433 * @oob_poi: poison value buffer
434 * @page_shift: [INTERN] number of address bits in a page (column
436 * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock
437 * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
438 * @chip_shift: [INTERN] number of address bits in one chip
439 * @options: [BOARDSPECIFIC] various chip options. They can partly
440 * be set to inform nand_scan about special functionality.
441 * See the defines for further explanation.
442 * @bbt_options: [INTERN] bad block specific options. All options used
443 * here must come from bbm.h. By default, these options
444 * will be copied to the appropriate nand_bbt_descr's.
445 * @badblockpos: [INTERN] position of the bad block marker in the oob
447 * @badblockbits: [INTERN] number of bits to left-shift the bad block
449 * @cellinfo: [INTERN] MLC/multichip data from chip ident
450 * @numchips: [INTERN] number of physical chips
451 * @chipsize: [INTERN] the size of one chip for multichip arrays
452 * @pagemask: [INTERN] page number mask = number of (pages / chip) - 1
453 * @pagebuf: [INTERN] holds the pagenumber which is currently in
455 * @subpagesize: [INTERN] holds the subpagesize
456 * @onfi_version: [INTERN] holds the chip ONFI version (BCD encoded),
457 * non 0 if ONFI supported.
458 * @onfi_params: [INTERN] holds the ONFI page parameter when ONFI is
459 * supported, 0 otherwise.
460 * @ecclayout: [REPLACEABLE] the default ecc placement scheme
461 * @bbt: [INTERN] bad block table pointer
462 * @bbt_td: [REPLACEABLE] bad block table descriptor for flash
464 * @bbt_md: [REPLACEABLE] bad block table mirror descriptor
465 * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial
467 * @controller: [REPLACEABLE] a pointer to a hardware controller
468 * structure which is shared among multiple independend
470 * @priv: [OPTIONAL] pointer to private chip date
471 * @errstat: [OPTIONAL] hardware specific function to perform
472 * additional error status checks (determine if errors are
474 * @write_page: [REPLACEABLE] High-level page write function
478 void __iomem *IO_ADDR_R;
479 void __iomem *IO_ADDR_W;
481 uint8_t (*read_byte)(struct mtd_info *mtd);
482 u16 (*read_word)(struct mtd_info *mtd);
483 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
484 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
485 int (*verify_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
486 void (*select_chip)(struct mtd_info *mtd, int chip);
487 int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip);
488 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
489 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
490 int (*init_size)(struct mtd_info *mtd, struct nand_chip *this,
492 int (*dev_ready)(struct mtd_info *mtd);
493 void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column,
495 int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
496 void (*erase_cmd)(struct mtd_info *mtd, int page);
497 int (*scan_bbt)(struct mtd_info *mtd);
498 int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state,
499 int status, int page);
500 int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
501 const uint8_t *buf, int page, int cached, int raw);
504 unsigned int options;
505 unsigned int bbt_options;
508 int phys_erase_shift;
521 struct nand_onfi_params onfi_params;
526 struct nand_hw_control *controller;
527 struct nand_ecclayout *ecclayout;
529 struct nand_ecc_ctrl ecc;
530 struct nand_buffers *buffers;
531 struct nand_hw_control hwcontrol;
533 struct mtd_oob_ops ops;
536 struct nand_bbt_descr *bbt_td;
537 struct nand_bbt_descr *bbt_md;
539 struct nand_bbt_descr *badblock_pattern;
545 * NAND Flash Manufacturer ID Codes
547 #define NAND_MFR_TOSHIBA 0x98
548 #define NAND_MFR_SAMSUNG 0xec
549 #define NAND_MFR_FUJITSU 0x04
550 #define NAND_MFR_NATIONAL 0x8f
551 #define NAND_MFR_RENESAS 0x07
552 #define NAND_MFR_STMICRO 0x20
553 #define NAND_MFR_HYNIX 0xad
554 #define NAND_MFR_MICRON 0x2c
555 #define NAND_MFR_AMD 0x01
558 * struct nand_flash_dev - NAND Flash Device ID Structure
559 * @name: Identify the device type
560 * @id: device ID code
561 * @pagesize: Pagesize in bytes. Either 256 or 512 or 0
562 * If the pagesize is 0, then the real pagesize
563 * and the eraseize are determined from the
564 * extended id bytes in the chip
565 * @erasesize: Size of an erase block in the flash device.
566 * @chipsize: Total chipsize in Mega Bytes
567 * @options: Bitfield to store chip relevant options
569 struct nand_flash_dev {
572 unsigned long pagesize;
573 unsigned long chipsize;
574 unsigned long erasesize;
575 unsigned long options;
579 * struct nand_manufacturers - NAND Flash Manufacturer ID Structure
580 * @name: Manufacturer name
581 * @id: manufacturer ID code of device.
583 struct nand_manufacturers {
588 extern struct nand_flash_dev nand_flash_ids[];
589 extern struct nand_manufacturers nand_manuf_ids[];
591 extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd);
592 extern int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
593 extern int nand_default_bbt(struct mtd_info *mtd);
594 extern int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt);
595 extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
597 extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
598 size_t *retlen, uint8_t *buf);
601 * struct platform_nand_chip - chip level device structure
602 * @nr_chips: max. number of chips to scan for
603 * @chip_offset: chip number offset
604 * @nr_partitions: number of partitions pointed to by partitions (or zero)
605 * @partitions: mtd partition list
606 * @chip_delay: R/B delay value in us
607 * @options: Option flags, e.g. 16bit buswidth
608 * @bbt_options: BBT option flags, e.g. NAND_BBT_USE_FLASH
609 * @ecclayout: ecc layout info structure
610 * @part_probe_types: NULL-terminated array of probe types
611 * @set_parts: platform specific function to set partitions
612 * @priv: hardware controller specific settings
614 struct platform_nand_chip {
618 struct mtd_partition *partitions;
619 struct nand_ecclayout *ecclayout;
621 unsigned int options;
622 unsigned int bbt_options;
623 const char **part_probe_types;
624 void (*set_parts)(uint64_t size, struct platform_nand_chip *chip);
629 struct platform_device;
632 * struct platform_nand_ctrl - controller level device structure
633 * @probe: platform specific function to probe/setup hardware
634 * @remove: platform specific function to remove/teardown hardware
635 * @hwcontrol: platform specific hardware control structure
636 * @dev_ready: platform specific function to read ready/busy pin
637 * @select_chip: platform specific chip select function
638 * @cmd_ctrl: platform specific function for controlling
639 * ALE/CLE/nCE. Also used to write command and address
640 * @write_buf: platform specific function for write buffer
641 * @read_buf: platform specific function for read buffer
642 * @priv: private data to transport driver specific settings
644 * All fields are optional and depend on the hardware driver requirements
646 struct platform_nand_ctrl {
647 int (*probe)(struct platform_device *pdev);
648 void (*remove)(struct platform_device *pdev);
649 void (*hwcontrol)(struct mtd_info *mtd, int cmd);
650 int (*dev_ready)(struct mtd_info *mtd);
651 void (*select_chip)(struct mtd_info *mtd, int chip);
652 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
653 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
654 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
659 * struct platform_nand_data - container structure for platform-specific data
660 * @chip: chip level chip structure
661 * @ctrl: controller level device structure
663 struct platform_nand_data {
664 struct platform_nand_chip chip;
665 struct platform_nand_ctrl ctrl;
668 /* Some helpers to access the data structures */
670 struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
672 struct nand_chip *chip = mtd->priv;
677 #endif /* __LINUX_MTD_NAND_H */