2 * linux/include/linux/mtd/nand.h
4 * Copyright (c) 2000 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
23 #include <linux/wait.h>
24 #include <linux/spinlock.h>
25 #include <linux/mtd/mtd.h>
30 #include "linux/mtd/compat.h"
31 #include "linux/mtd/mtd.h"
32 #include "linux/mtd/bbm.h"
36 /* Scan and identify a NAND device */
37 extern int nand_scan (struct mtd_info *mtd, int max_chips);
38 /* Separate phases of nand_scan(), allowing board driver to intervene
39 * and override command or ECC setup according to flash type */
40 extern int nand_scan_ident(struct mtd_info *mtd, int max_chips);
41 extern int nand_scan_tail(struct mtd_info *mtd);
43 /* Free resources held by the NAND device */
44 extern void nand_release (struct mtd_info *mtd);
46 /* Internal helper for board drivers which need to override command function */
47 extern void nand_wait_ready(struct mtd_info *mtd);
49 /* The maximum number of NAND chips in an array */
50 #ifndef NAND_MAX_CHIPS
51 #define NAND_MAX_CHIPS 8
54 /* This constant declares the max. oobsize / page, which
55 * is supported now. If you add a chip with bigger oobsize/page
56 * adjust this accordingly.
58 #define NAND_MAX_OOBSIZE 128
59 #define NAND_MAX_PAGESIZE 4096
62 * Constants for hardware specific CLE/ALE/NCE function
64 * These are bits which can be or'ed to set/clear multiple
67 /* Select the chip by setting nCE to low */
69 /* Select the command latch by setting CLE to high */
71 /* Select the address latch by setting ALE to high */
74 #define NAND_CTRL_CLE (NAND_NCE | NAND_CLE)
75 #define NAND_CTRL_ALE (NAND_NCE | NAND_ALE)
76 #define NAND_CTRL_CHANGE 0x80
79 * Standard NAND flash commands
81 #define NAND_CMD_READ0 0
82 #define NAND_CMD_READ1 1
83 #define NAND_CMD_RNDOUT 5
84 #define NAND_CMD_PAGEPROG 0x10
85 #define NAND_CMD_READOOB 0x50
86 #define NAND_CMD_ERASE1 0x60
87 #define NAND_CMD_STATUS 0x70
88 #define NAND_CMD_STATUS_MULTI 0x71
89 #define NAND_CMD_SEQIN 0x80
90 #define NAND_CMD_RNDIN 0x85
91 #define NAND_CMD_READID 0x90
92 #define NAND_CMD_ERASE2 0xd0
93 #define NAND_CMD_RESET 0xff
95 /* Extended commands for large page devices */
96 #define NAND_CMD_READSTART 0x30
97 #define NAND_CMD_RNDOUTSTART 0xE0
98 #define NAND_CMD_CACHEDPROG 0x15
100 /* Extended commands for AG-AND device */
102 * Note: the command for NAND_CMD_DEPLETE1 is really 0x00 but
103 * there is no way to distinguish that from NAND_CMD_READ0
104 * until the remaining sequence of commands has been completed
105 * so add a high order bit and mask it off in the command.
107 #define NAND_CMD_DEPLETE1 0x100
108 #define NAND_CMD_DEPLETE2 0x38
109 #define NAND_CMD_STATUS_MULTI 0x71
110 #define NAND_CMD_STATUS_ERROR 0x72
111 /* multi-bank error status (banks 0-3) */
112 #define NAND_CMD_STATUS_ERROR0 0x73
113 #define NAND_CMD_STATUS_ERROR1 0x74
114 #define NAND_CMD_STATUS_ERROR2 0x75
115 #define NAND_CMD_STATUS_ERROR3 0x76
116 #define NAND_CMD_STATUS_RESET 0x7f
117 #define NAND_CMD_STATUS_CLEAR 0xff
119 #define NAND_CMD_NONE -1
122 #define NAND_STATUS_FAIL 0x01
123 #define NAND_STATUS_FAIL_N1 0x02
124 #define NAND_STATUS_TRUE_READY 0x20
125 #define NAND_STATUS_READY 0x40
126 #define NAND_STATUS_WP 0x80
129 * Constants for ECC_MODES
135 NAND_ECC_HW_SYNDROME,
139 * Constants for Hardware ECC
141 /* Reset Hardware ECC for read */
142 #define NAND_ECC_READ 0
143 /* Reset Hardware ECC for write */
144 #define NAND_ECC_WRITE 1
145 /* Enable Hardware ECC before syndrom is read back from flash */
146 #define NAND_ECC_READSYN 2
148 /* Bit mask for flags passed to do_nand_read_ecc */
149 #define NAND_GET_DEVICE 0x80
152 /* Option constants for bizarre disfunctionality and real
155 /* Chip can not auto increment pages */
156 #define NAND_NO_AUTOINCR 0x00000001
157 /* Buswitdh is 16 bit */
158 #define NAND_BUSWIDTH_16 0x00000002
159 /* Device supports partial programming without padding */
160 #define NAND_NO_PADDING 0x00000004
161 /* Chip has cache program function */
162 #define NAND_CACHEPRG 0x00000008
163 /* Chip has copy back function */
164 #define NAND_COPYBACK 0x00000010
165 /* AND Chip which has 4 banks and a confusing page / block
166 * assignment. See Renesas datasheet for further information */
167 #define NAND_IS_AND 0x00000020
168 /* Chip has a array of 4 pages which can be read without
169 * additional ready /busy waits */
170 #define NAND_4PAGE_ARRAY 0x00000040
171 /* Chip requires that BBT is periodically rewritten to prevent
172 * bits from adjacent blocks from 'leaking' in altering data.
173 * This happens with the Renesas AG-AND chips, possibly others. */
174 #define BBT_AUTO_REFRESH 0x00000080
175 /* Chip does not require ready check on read. True
176 * for all large page devices, as they do not support
178 #define NAND_NO_READRDY 0x00000100
179 /* Chip does not allow subpage writes */
180 #define NAND_NO_SUBPAGE_WRITE 0x00000200
183 /* Options valid for Samsung large page devices */
184 #define NAND_SAMSUNG_LP_OPTIONS \
185 (NAND_NO_PADDING | NAND_CACHEPRG | NAND_COPYBACK)
187 /* Macros to identify the above */
188 #define NAND_CANAUTOINCR(chip) (!(chip->options & NAND_NO_AUTOINCR))
189 #define NAND_MUST_PAD(chip) (!(chip->options & NAND_NO_PADDING))
190 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
191 #define NAND_HAS_COPYBACK(chip) ((chip->options & NAND_COPYBACK))
192 /* Large page NAND with SOFT_ECC should support subpage reads */
193 #define NAND_SUBPAGE_READ(chip) ((chip->ecc.mode == NAND_ECC_SOFT) \
194 && (chip->page_shift > 9))
196 /* Mask to zero out the chip options, which come from the id table */
197 #define NAND_CHIPOPTIONS_MSK (0x0000ffff & ~NAND_NO_AUTOINCR)
199 /* Non chip related options */
200 /* Use a flash based bad block table. This option is passed to the
201 * default bad block table function. */
202 #define NAND_USE_FLASH_BBT 0x00010000
203 /* This option skips the bbt scan during initialization. */
204 #define NAND_SKIP_BBTSCAN 0x00020000
205 /* This option is defined if the board driver allocates its own buffers
206 (e.g. because it needs them DMA-coherent */
207 #define NAND_OWN_BUFFERS 0x00040000
208 /* Options set by nand scan */
209 /* bbt has already been read */
210 #define NAND_BBT_SCANNED 0x40000000
211 /* Nand scan has allocated controller struct */
212 #define NAND_CONTROLLER_ALLOC 0x80000000
214 /* Cell info constants */
215 #define NAND_CI_CHIPNR_MSK 0x03
216 #define NAND_CI_CELLTYPE_MSK 0x0C
222 * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independent devices
223 * @lock: protection lock
224 * @active: the mtd device which holds the controller currently
225 * @wq: wait queue to sleep on if a NAND operation is in progress
226 * used instead of the per chip wait queue when a hw controller is available
228 struct nand_hw_control {
232 wait_queue_head_t wq;
234 struct nand_chip *active;
238 * struct nand_ecc_ctrl - Control structure for ecc
240 * @steps: number of ecc steps per page
241 * @size: data bytes per ecc step
242 * @bytes: ecc bytes per step
243 * @total: total number of ecc bytes per page
244 * @prepad: padding information for syndrome based ecc generators
245 * @postpad: padding information for syndrome based ecc generators
246 * @layout: ECC layout control struct pointer
247 * @hwctl: function to control hardware ecc generator. Must only
248 * be provided if an hardware ECC is available
249 * @calculate: function for ecc calculation or readback from ecc hardware
250 * @correct: function for ecc correction, matching to ecc generator (sw/hw)
251 * @read_page_raw: function to read a raw page without ECC
252 * @write_page_raw: function to write a raw page without ECC
253 * @read_page: function to read a page according to the ecc generator requirements
254 * @write_page: function to write a page according to the ecc generator requirements
255 * @read_oob: function to read chip OOB data
256 * @write_oob: function to write chip OOB data
258 struct nand_ecc_ctrl {
259 nand_ecc_modes_t mode;
266 struct nand_ecclayout *layout;
267 void (*hwctl)(struct mtd_info *mtd, int mode);
268 int (*calculate)(struct mtd_info *mtd,
271 int (*correct)(struct mtd_info *mtd, uint8_t *dat,
274 int (*read_page_raw)(struct mtd_info *mtd,
275 struct nand_chip *chip,
277 void (*write_page_raw)(struct mtd_info *mtd,
278 struct nand_chip *chip,
280 int (*read_page)(struct mtd_info *mtd,
281 struct nand_chip *chip,
283 int (*read_subpage)(struct mtd_info *mtd,
284 struct nand_chip *chip,
285 uint32_t offs, uint32_t len,
287 void (*write_page)(struct mtd_info *mtd,
288 struct nand_chip *chip,
290 int (*read_oob)(struct mtd_info *mtd,
291 struct nand_chip *chip,
294 int (*write_oob)(struct mtd_info *mtd,
295 struct nand_chip *chip,
300 * struct nand_buffers - buffer structure for read/write
301 * @ecccalc: buffer for calculated ecc
302 * @ecccode: buffer for ecc read from flash
303 * @databuf: buffer for data - dynamically sized
305 * Do not change the order of buffers. databuf and oobrbuf must be in
308 struct nand_buffers {
309 uint8_t ecccalc[NAND_MAX_OOBSIZE];
310 uint8_t ecccode[NAND_MAX_OOBSIZE];
311 uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE];
315 * struct nand_chip - NAND Private Flash Chip Data
316 * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the flash device
317 * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the flash device
318 * @read_byte: [REPLACEABLE] read one byte from the chip
319 * @read_word: [REPLACEABLE] read one word from the chip
320 * @write_buf: [REPLACEABLE] write data from the buffer to the chip
321 * @read_buf: [REPLACEABLE] read data from the chip into the buffer
322 * @verify_buf: [REPLACEABLE] verify buffer contents against the chip data
323 * @select_chip: [REPLACEABLE] select chip nr
324 * @block_bad: [REPLACEABLE] check, if the block is bad
325 * @block_markbad: [REPLACEABLE] mark the block bad
326 * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific funtion for controlling
327 * ALE/CLE/nCE. Also used to write command and address
328 * @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accesing device ready/busy line
329 * If set to NULL no access to ready/busy is available and the ready/busy information
330 * is read from the chip status register
331 * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing commands to the chip
332 * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on ready
333 * @ecc: [BOARDSPECIFIC] ecc control ctructure
334 * @buffers: buffer structure for read/write
335 * @hwcontrol: platform-specific hardware control structure
336 * @ops: oob operation operands
337 * @erase_cmd: [INTERN] erase command write function, selectable due to AND support
338 * @scan_bbt: [REPLACEABLE] function to scan bad block table
339 * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transfering data from array to read regs (tR)
340 * @wq: [INTERN] wait queue to sleep on if a NAND operation is in progress
341 * @state: [INTERN] the current state of the NAND device
342 * @oob_poi: poison value buffer
343 * @page_shift: [INTERN] number of address bits in a page (column address bits)
344 * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock
345 * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
346 * @chip_shift: [INTERN] number of address bits in one chip
347 * @datbuf: [INTERN] internal buffer for one page + oob
348 * @oobbuf: [INTERN] oob buffer for one eraseblock
349 * @oobdirty: [INTERN] indicates that oob_buf must be reinitialized
350 * @data_poi: [INTERN] pointer to a data buffer
351 * @options: [BOARDSPECIFIC] various chip options. They can partly be set to inform nand_scan about
352 * special functionality. See the defines for further explanation
353 * @badblockpos: [INTERN] position of the bad block marker in the oob area
354 * @cellinfo: [INTERN] MLC/multichip data from chip ident
355 * @numchips: [INTERN] number of physical chips
356 * @chipsize: [INTERN] the size of one chip for multichip arrays
357 * @pagemask: [INTERN] page number mask = number of (pages / chip) - 1
358 * @pagebuf: [INTERN] holds the pagenumber which is currently in data_buf
359 * @subpagesize: [INTERN] holds the subpagesize
360 * @ecclayout: [REPLACEABLE] the default ecc placement scheme
361 * @bbt: [INTERN] bad block table pointer
362 * @bbt_td: [REPLACEABLE] bad block table descriptor for flash lookup
363 * @bbt_md: [REPLACEABLE] bad block table mirror descriptor
364 * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial bad block scan
365 * @controller: [REPLACEABLE] a pointer to a hardware controller structure
366 * which is shared among multiple independend devices
367 * @priv: [OPTIONAL] pointer to private chip date
368 * @errstat: [OPTIONAL] hardware specific function to perform additional error status checks
369 * (determine if errors are correctable)
370 * @write_page: [REPLACEABLE] High-level page write function
374 void __iomem *IO_ADDR_R;
375 void __iomem *IO_ADDR_W;
377 uint8_t (*read_byte)(struct mtd_info *mtd);
378 u16 (*read_word)(struct mtd_info *mtd);
379 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
380 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
381 int (*verify_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
382 void (*select_chip)(struct mtd_info *mtd, int chip);
383 int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip);
384 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
385 void (*cmd_ctrl)(struct mtd_info *mtd, int dat,
387 int (*dev_ready)(struct mtd_info *mtd);
388 void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, int page_addr);
389 int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
390 void (*erase_cmd)(struct mtd_info *mtd, int page);
391 int (*scan_bbt)(struct mtd_info *mtd);
392 int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);
393 int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
394 const uint8_t *buf, int page, int cached, int raw);
397 unsigned int options;
400 int phys_erase_shift;
404 unsigned long chipsize;
414 struct nand_hw_control *controller;
415 struct nand_ecclayout *ecclayout;
417 struct nand_ecc_ctrl ecc;
418 struct nand_buffers *buffers;
420 struct nand_hw_control hwcontrol;
422 struct mtd_oob_ops ops;
425 struct nand_bbt_descr *bbt_td;
426 struct nand_bbt_descr *bbt_md;
428 struct nand_bbt_descr *badblock_pattern;
434 * NAND Flash Manufacturer ID Codes
436 #define NAND_MFR_TOSHIBA 0x98
437 #define NAND_MFR_SAMSUNG 0xec
438 #define NAND_MFR_FUJITSU 0x04
439 #define NAND_MFR_NATIONAL 0x8f
440 #define NAND_MFR_RENESAS 0x07
441 #define NAND_MFR_STMICRO 0x20
442 #define NAND_MFR_HYNIX 0xad
443 #define NAND_MFR_MICRON 0x2c
444 #define NAND_MFR_AMD 0x01
447 * struct nand_flash_dev - NAND Flash Device ID Structure
448 * @name: Identify the device type
449 * @id: device ID code
450 * @pagesize: Pagesize in bytes. Either 256 or 512 or 0
451 * If the pagesize is 0, then the real pagesize
452 * and the eraseize are determined from the
453 * extended id bytes in the chip
454 * @erasesize: Size of an erase block in the flash device.
455 * @chipsize: Total chipsize in Mega Bytes
456 * @options: Bitfield to store chip relevant options
458 struct nand_flash_dev {
461 unsigned long pagesize;
462 unsigned long chipsize;
463 unsigned long erasesize;
464 unsigned long options;
468 * struct nand_manufacturers - NAND Flash Manufacturer ID Structure
469 * @name: Manufacturer name
470 * @id: manufacturer ID code of device.
472 struct nand_manufacturers {
477 extern struct nand_flash_dev nand_flash_ids[];
478 extern struct nand_manufacturers nand_manuf_ids[];
480 #ifndef NAND_MAX_CHIPS
481 #define NAND_MAX_CHIPS 8
484 extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd);
485 extern int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
486 extern int nand_default_bbt(struct mtd_info *mtd);
487 extern int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt);
488 extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
490 extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
491 size_t * retlen, uint8_t * buf);
494 * Constants for oob configuration
496 #define NAND_SMALL_BADBLOCK_POS 5
497 #define NAND_LARGE_BADBLOCK_POS 0
500 * struct platform_nand_chip - chip level device structure
501 * @nr_chips: max. number of chips to scan for
502 * @chip_offset: chip number offset
503 * @nr_partitions: number of partitions pointed to by partitions (or zero)
504 * @partitions: mtd partition list
505 * @chip_delay: R/B delay value in us
506 * @options: Option flags, e.g. 16bit buswidth
507 * @ecclayout: ecc layout info structure
508 * @part_probe_types: NULL-terminated array of probe types
509 * @priv: hardware controller specific settings
511 struct platform_nand_chip {
515 struct mtd_partition *partitions;
516 struct nand_ecclayout *ecclayout;
518 unsigned int options;
519 const char **part_probe_types;
524 * struct platform_nand_ctrl - controller level device structure
525 * @hwcontrol: platform specific hardware control structure
526 * @dev_ready: platform specific function to read ready/busy pin
527 * @select_chip: platform specific chip select function
528 * @cmd_ctrl: platform specific function for controlling
529 * ALE/CLE/nCE. Also used to write command and address
530 * @priv: private data to transport driver specific settings
532 * All fields are optional and depend on the hardware driver requirements
534 struct platform_nand_ctrl {
535 void (*hwcontrol)(struct mtd_info *mtd, int cmd);
536 int (*dev_ready)(struct mtd_info *mtd);
537 void (*select_chip)(struct mtd_info *mtd, int chip);
538 void (*cmd_ctrl)(struct mtd_info *mtd, int dat,
544 * struct platform_nand_data - container structure for platform-specific data
545 * @chip: chip level chip structure
546 * @ctrl: controller level device structure
548 struct platform_nand_data {
549 struct platform_nand_chip chip;
550 struct platform_nand_ctrl ctrl;
553 /* Some helpers to access the data structures */
555 struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
557 struct nand_chip *chip = mtd->priv;
562 #endif /* __LINUX_MTD_NAND_H */