2 * linux/include/linux/mtd/nand.h
4 * Copyright (c) 2000 David Woodhouse <dwmw2@mvhi.com>
5 * Steven J. Hill <sjhill@realitydiluted.com>
6 * Thomas Gleixner <tglx@linutronix.de>
8 * $Id: nand.h,v 1.74 2005/09/15 13:58:50 vwool Exp $
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 * Contains standard defines and IDs for NAND flash devices
20 #ifndef __LINUX_MTD_NAND_H
21 #define __LINUX_MTD_NAND_H
23 #include <linux/config.h>
24 #include <linux/wait.h>
25 #include <linux/spinlock.h>
26 #include <linux/mtd/mtd.h>
29 /* Scan and identify a NAND device */
30 extern int nand_scan (struct mtd_info *mtd, int max_chips);
31 /* Free resources held by the NAND device */
32 extern void nand_release (struct mtd_info *mtd);
34 /* Read raw data from the device without ECC */
35 extern int nand_read_raw (struct mtd_info *mtd, uint8_t *buf, loff_t from,
36 size_t len, size_t ooblen);
39 extern int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len,
40 size_t *retlen, uint8_t *buf, uint8_t *oob);
42 /* The maximum number of NAND chips in an array */
43 #define NAND_MAX_CHIPS 8
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.
49 #define NAND_MAX_OOBSIZE 64
52 * Constants for hardware specific CLE/ALE/NCE function
54 * These are bits which can be or'ed to set/clear multiple
57 /* Select the chip by setting nCE to low */
59 /* Select the command latch by setting CLE to high */
61 /* Select the address latch by setting ALE to high */
64 #define NAND_CTRL_CLE (NAND_NCE | NAND_CLE)
65 #define NAND_CTRL_ALE (NAND_NCE | NAND_ALE)
66 #define NAND_CTRL_CHANGE 0x80
69 * Standard NAND flash commands
71 #define NAND_CMD_READ0 0
72 #define NAND_CMD_READ1 1
73 #define NAND_CMD_PAGEPROG 0x10
74 #define NAND_CMD_READOOB 0x50
75 #define NAND_CMD_ERASE1 0x60
76 #define NAND_CMD_STATUS 0x70
77 #define NAND_CMD_STATUS_MULTI 0x71
78 #define NAND_CMD_SEQIN 0x80
79 #define NAND_CMD_READID 0x90
80 #define NAND_CMD_ERASE2 0xd0
81 #define NAND_CMD_RESET 0xff
83 /* Extended commands for large page devices */
84 #define NAND_CMD_READSTART 0x30
85 #define NAND_CMD_CACHEDPROG 0x15
87 /* Extended commands for AG-AND device */
89 * Note: the command for NAND_CMD_DEPLETE1 is really 0x00 but
90 * there is no way to distinguish that from NAND_CMD_READ0
91 * until the remaining sequence of commands has been completed
92 * so add a high order bit and mask it off in the command.
94 #define NAND_CMD_DEPLETE1 0x100
95 #define NAND_CMD_DEPLETE2 0x38
96 #define NAND_CMD_STATUS_MULTI 0x71
97 #define NAND_CMD_STATUS_ERROR 0x72
98 /* multi-bank error status (banks 0-3) */
99 #define NAND_CMD_STATUS_ERROR0 0x73
100 #define NAND_CMD_STATUS_ERROR1 0x74
101 #define NAND_CMD_STATUS_ERROR2 0x75
102 #define NAND_CMD_STATUS_ERROR3 0x76
103 #define NAND_CMD_STATUS_RESET 0x7f
104 #define NAND_CMD_STATUS_CLEAR 0xff
106 #define NAND_CMD_NONE -1
109 #define NAND_STATUS_FAIL 0x01
110 #define NAND_STATUS_FAIL_N1 0x02
111 #define NAND_STATUS_TRUE_READY 0x20
112 #define NAND_STATUS_READY 0x40
113 #define NAND_STATUS_WP 0x80
116 * Constants for ECC_MODES
122 NAND_ECC_HW_SYNDROME,
126 * Constants for Hardware ECC
128 /* Reset Hardware ECC for read */
129 #define NAND_ECC_READ 0
130 /* Reset Hardware ECC for write */
131 #define NAND_ECC_WRITE 1
132 /* Enable Hardware ECC before syndrom is read back from flash */
133 #define NAND_ECC_READSYN 2
135 /* Bit mask for flags passed to do_nand_read_ecc */
136 #define NAND_GET_DEVICE 0x80
139 /* Option constants for bizarre disfunctionality and real
142 /* Chip can not auto increment pages */
143 #define NAND_NO_AUTOINCR 0x00000001
144 /* Buswitdh is 16 bit */
145 #define NAND_BUSWIDTH_16 0x00000002
146 /* Device supports partial programming without padding */
147 #define NAND_NO_PADDING 0x00000004
148 /* Chip has cache program function */
149 #define NAND_CACHEPRG 0x00000008
150 /* Chip has copy back function */
151 #define NAND_COPYBACK 0x00000010
152 /* AND Chip which has 4 banks and a confusing page / block
153 * assignment. See Renesas datasheet for further information */
154 #define NAND_IS_AND 0x00000020
155 /* Chip has a array of 4 pages which can be read without
156 * additional ready /busy waits */
157 #define NAND_4PAGE_ARRAY 0x00000040
158 /* Chip requires that BBT is periodically rewritten to prevent
159 * bits from adjacent blocks from 'leaking' in altering data.
160 * This happens with the Renesas AG-AND chips, possibly others. */
161 #define BBT_AUTO_REFRESH 0x00000080
163 /* Options valid for Samsung large page devices */
164 #define NAND_SAMSUNG_LP_OPTIONS \
165 (NAND_NO_PADDING | NAND_CACHEPRG | NAND_COPYBACK)
167 /* Macros to identify the above */
168 #define NAND_CANAUTOINCR(chip) (!(chip->options & NAND_NO_AUTOINCR))
169 #define NAND_MUST_PAD(chip) (!(chip->options & NAND_NO_PADDING))
170 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
171 #define NAND_HAS_COPYBACK(chip) ((chip->options & NAND_COPYBACK))
173 /* Mask to zero out the chip options, which come from the id table */
174 #define NAND_CHIPOPTIONS_MSK (0x0000ffff & ~NAND_NO_AUTOINCR)
176 /* Non chip related options */
177 /* Use a flash based bad block table. This option is passed to the
178 * default bad block table function. */
179 #define NAND_USE_FLASH_BBT 0x00010000
180 /* The hw ecc generator provides a syndrome instead a ecc value on read
181 * This can only work if we have the ecc bytes directly behind the
182 * data bytes. Applies for DOC and AG-AND Renesas HW Reed Solomon generators */
183 #define NAND_HWECC_SYNDROME 0x00020000
184 /* This option skips the bbt scan during initialization. */
185 #define NAND_SKIP_BBTSCAN 0x00040000
187 /* Options set by nand scan */
188 /* Nand scan has allocated controller struct */
189 #define NAND_CONTROLLER_ALLOC 0x20000000
190 /* Nand scan has allocated oob_buf */
191 #define NAND_OOBBUF_ALLOC 0x40000000
192 /* Nand scan has allocated data_buf */
193 #define NAND_DATABUF_ALLOC 0x80000000
197 * nand_state_t - chip states
198 * Enumeration for NAND flash chip state
214 * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independend devices
215 * @lock: protection lock
216 * @active: the mtd device which holds the controller currently
217 * @wq: wait queue to sleep on if a NAND operation is in progress
218 * used instead of the per chip wait queue when a hw controller is available
220 struct nand_hw_control {
222 struct nand_chip *active;
223 wait_queue_head_t wq;
227 * struct nand_ecc_ctrl - Control structure for ecc
229 * @steps: number of ecc steps per page
230 * @size: data bytes per ecc step
231 * @bytes: ecc bytes per step
232 * @hwctl: function to control hardware ecc generator. Must only
233 * be provided if an hardware ECC is available
234 * @calculate: function for ecc calculation or readback from ecc hardware
235 * @correct: function for ecc correction, matching to ecc generator (sw/hw)
237 struct nand_ecc_ctrl {
238 nand_ecc_modes_t mode;
242 void (*hwctl)(struct mtd_info *mtd, int mode);
243 int (*calculate)(struct mtd_info *mtd,
246 int (*correct)(struct mtd_info *mtd, uint8_t *dat,
252 * struct nand_chip - NAND Private Flash Chip Data
253 * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the flash device
254 * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the flash device
255 * @read_byte: [REPLACEABLE] read one byte from the chip
256 * @write_byte: [REPLACEABLE] write one byte to the chip
257 * @read_word: [REPLACEABLE] read one word from the chip
258 * @write_word: [REPLACEABLE] write one word to the chip
259 * @write_buf: [REPLACEABLE] write data from the buffer to the chip
260 * @read_buf: [REPLACEABLE] read data from the chip into the buffer
261 * @verify_buf: [REPLACEABLE] verify buffer contents against the chip data
262 * @select_chip: [REPLACEABLE] select chip nr
263 * @block_bad: [REPLACEABLE] check, if the block is bad
264 * @block_markbad: [REPLACEABLE] mark the block bad
265 * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific funtion for controlling
266 * ALE/CLE/nCE. Also used to write command and address
267 * @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accesing device ready/busy line
268 * If set to NULL no access to ready/busy is available and the ready/busy information
269 * is read from the chip status register
270 * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing commands to the chip
271 * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on ready
272 * @ecc: [BOARDSPECIFIC] ecc control ctructure
273 * @erase_cmd: [INTERN] erase command write function, selectable due to AND support
274 * @scan_bbt: [REPLACEABLE] function to scan bad block table
275 * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transfering data from array to read regs (tR)
276 * @wq: [INTERN] wait queue to sleep on if a NAND operation is in progress
277 * @state: [INTERN] the current state of the NAND device
278 * @page_shift: [INTERN] number of address bits in a page (column address bits)
279 * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock
280 * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
281 * @chip_shift: [INTERN] number of address bits in one chip
282 * @data_buf: [INTERN] internal buffer for one page + oob
283 * @oob_buf: [INTERN] oob buffer for one eraseblock
284 * @oobdirty: [INTERN] indicates that oob_buf must be reinitialized
285 * @data_poi: [INTERN] pointer to a data buffer
286 * @options: [BOARDSPECIFIC] various chip options. They can partly be set to inform nand_scan about
287 * special functionality. See the defines for further explanation
288 * @badblockpos: [INTERN] position of the bad block marker in the oob area
289 * @numchips: [INTERN] number of physical chips
290 * @chipsize: [INTERN] the size of one chip for multichip arrays
291 * @pagemask: [INTERN] page number mask = number of (pages / chip) - 1
292 * @pagebuf: [INTERN] holds the pagenumber which is currently in data_buf
293 * @autooob: [REPLACEABLE] the default (auto)placement scheme
294 * @bbt: [INTERN] bad block table pointer
295 * @bbt_td: [REPLACEABLE] bad block table descriptor for flash lookup
296 * @bbt_md: [REPLACEABLE] bad block table mirror descriptor
297 * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial bad block scan
298 * @controller: [REPLACEABLE] a pointer to a hardware controller structure
299 * which is shared among multiple independend devices
300 * @priv: [OPTIONAL] pointer to private chip date
301 * @errstat: [OPTIONAL] hardware specific function to perform additional error status checks
302 * (determine if errors are correctable)
306 void __iomem *IO_ADDR_R;
307 void __iomem *IO_ADDR_W;
309 uint8_t (*read_byte)(struct mtd_info *mtd);
310 void (*write_byte)(struct mtd_info *mtd, uint8_t byte);
311 u16 (*read_word)(struct mtd_info *mtd);
312 void (*write_word)(struct mtd_info *mtd, u16 word);
314 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
315 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
316 int (*verify_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
317 void (*select_chip)(struct mtd_info *mtd, int chip);
318 int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip);
319 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
320 void (*cmd_ctrl)(struct mtd_info *mtd, int dat,
322 int (*dev_ready)(struct mtd_info *mtd);
323 void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, int page_addr);
324 int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this, int state);
325 void (*erase_cmd)(struct mtd_info *mtd, int page);
326 int (*scan_bbt)(struct mtd_info *mtd);
327 struct nand_ecc_ctrl ecc;
329 wait_queue_head_t wq;
332 int phys_erase_shift;
339 unsigned int options;
342 unsigned long chipsize;
345 struct nand_oobinfo *autooob;
347 struct nand_bbt_descr *bbt_td;
348 struct nand_bbt_descr *bbt_md;
349 struct nand_bbt_descr *badblock_pattern;
350 struct nand_hw_control *controller;
352 int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page);
356 * NAND Flash Manufacturer ID Codes
358 #define NAND_MFR_TOSHIBA 0x98
359 #define NAND_MFR_SAMSUNG 0xec
360 #define NAND_MFR_FUJITSU 0x04
361 #define NAND_MFR_NATIONAL 0x8f
362 #define NAND_MFR_RENESAS 0x07
363 #define NAND_MFR_STMICRO 0x20
364 #define NAND_MFR_HYNIX 0xad
367 * struct nand_flash_dev - NAND Flash Device ID Structure
369 * @name: Identify the device type
370 * @id: device ID code
371 * @pagesize: Pagesize in bytes. Either 256 or 512 or 0
372 * If the pagesize is 0, then the real pagesize
373 * and the eraseize are determined from the
374 * extended id bytes in the chip
375 * @erasesize: Size of an erase block in the flash device.
376 * @chipsize: Total chipsize in Mega Bytes
377 * @options: Bitfield to store chip relevant options
379 struct nand_flash_dev {
382 unsigned long pagesize;
383 unsigned long chipsize;
384 unsigned long erasesize;
385 unsigned long options;
389 * struct nand_manufacturers - NAND Flash Manufacturer ID Structure
390 * @name: Manufacturer name
391 * @id: manufacturer ID code of device.
393 struct nand_manufacturers {
398 extern struct nand_flash_dev nand_flash_ids[];
399 extern struct nand_manufacturers nand_manuf_ids[];
402 * struct nand_bbt_descr - bad block table descriptor
403 * @options: options for this descriptor
404 * @pages: the page(s) where we find the bbt, used with option BBT_ABSPAGE
405 * when bbt is searched, then we store the found bbts pages here.
406 * Its an array and supports up to 8 chips now
407 * @offs: offset of the pattern in the oob area of the page
408 * @veroffs: offset of the bbt version counter in the oob are of the page
409 * @version: version read from the bbt page during scan
410 * @len: length of the pattern, if 0 no pattern check is performed
411 * @maxblocks: maximum number of blocks to search for a bbt. This number of
412 * blocks is reserved at the end of the device where the tables are
414 * @reserved_block_code: if non-0, this pattern denotes a reserved (rather than
415 * bad) block in the stored bbt
416 * @pattern: pattern to identify bad block table or factory marked good /
417 * bad blocks, can be NULL, if len = 0
419 * Descriptor for the bad block table marker and the descriptor for the
420 * pattern which identifies good and bad blocks. The assumption is made
421 * that the pattern and the version count are always located in the oob area
422 * of the first block.
424 struct nand_bbt_descr {
426 int pages[NAND_MAX_CHIPS];
429 uint8_t version[NAND_MAX_CHIPS];
432 int reserved_block_code;
436 /* Options for the bad block table descriptors */
438 /* The number of bits used per block in the bbt on the device */
439 #define NAND_BBT_NRBITS_MSK 0x0000000F
440 #define NAND_BBT_1BIT 0x00000001
441 #define NAND_BBT_2BIT 0x00000002
442 #define NAND_BBT_4BIT 0x00000004
443 #define NAND_BBT_8BIT 0x00000008
444 /* The bad block table is in the last good block of the device */
445 #define NAND_BBT_LASTBLOCK 0x00000010
446 /* The bbt is at the given page, else we must scan for the bbt */
447 #define NAND_BBT_ABSPAGE 0x00000020
448 /* The bbt is at the given page, else we must scan for the bbt */
449 #define NAND_BBT_SEARCH 0x00000040
450 /* bbt is stored per chip on multichip devices */
451 #define NAND_BBT_PERCHIP 0x00000080
452 /* bbt has a version counter at offset veroffs */
453 #define NAND_BBT_VERSION 0x00000100
454 /* Create a bbt if none axists */
455 #define NAND_BBT_CREATE 0x00000200
456 /* Search good / bad pattern through all pages of a block */
457 #define NAND_BBT_SCANALLPAGES 0x00000400
458 /* Scan block empty during good / bad block scan */
459 #define NAND_BBT_SCANEMPTY 0x00000800
460 /* Write bbt if neccecary */
461 #define NAND_BBT_WRITE 0x00001000
462 /* Read and write back block contents when writing bbt */
463 #define NAND_BBT_SAVECONTENT 0x00002000
464 /* Search good / bad pattern on the first and the second page */
465 #define NAND_BBT_SCAN2NDPAGE 0x00004000
467 /* The maximum number of blocks to scan for a bbt */
468 #define NAND_BBT_SCAN_MAXBLOCKS 4
470 extern int nand_scan_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd);
471 extern int nand_update_bbt (struct mtd_info *mtd, loff_t offs);
472 extern int nand_default_bbt (struct mtd_info *mtd);
473 extern int nand_isbad_bbt (struct mtd_info *mtd, loff_t offs, int allowbbt);
474 extern int nand_erase_nand (struct mtd_info *mtd, struct erase_info *instr, int allowbbt);
475 extern int nand_do_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
476 size_t * retlen, uint8_t * buf, uint8_t * oob_buf,
477 struct nand_oobinfo *oobsel, int flags);
480 * Constants for oob configuration
482 #define NAND_SMALL_BADBLOCK_POS 5
483 #define NAND_LARGE_BADBLOCK_POS 0
486 * struct platform_nand_chip - chip level device structure
488 * @nr_chips: max. number of chips to scan for
489 * @chip_offs: chip number offset
490 * @nr_partitions: number of partitions pointed to be partitoons (or zero)
491 * @partitions: mtd partition list
492 * @chip_delay: R/B delay value in us
493 * @options: Option flags, e.g. 16bit buswidth
494 * @priv: hardware controller specific settings
496 struct platform_nand_chip {
500 struct mtd_partition *partitions;
502 unsigned int options;
507 * struct platform_nand_ctrl - controller level device structure
509 * @hwcontrol: platform specific hardware control structure
510 * @dev_ready: platform specific function to read ready/busy pin
511 * @select_chip: platform specific chip select function
512 * @priv_data: private data to transport driver specific settings
514 * All fields are optional and depend on the hardware driver requirements
516 struct platform_nand_ctrl {
517 void (*hwcontrol)(struct mtd_info *mtd, int cmd);
518 int (*dev_ready)(struct mtd_info *mtd);
519 void (*select_chip)(struct mtd_info *mtd, int chip);
523 /* Some helpers to access the data structures */
525 struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
527 struct nand_chip *chip = mtd->priv;
532 #endif /* __LINUX_MTD_NAND_H */