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 blocks present in the device */
46 extern int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
48 /* unlocks specified locked blocks */
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 640
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_SEQIN 0x80
90 #define NAND_CMD_RNDIN 0x85
91 #define NAND_CMD_READID 0x90
92 #define NAND_CMD_ERASE2 0xd0
93 #define NAND_CMD_PARAM 0xec
94 #define NAND_CMD_GET_FEATURES 0xee
95 #define NAND_CMD_SET_FEATURES 0xef
96 #define NAND_CMD_RESET 0xff
98 #define NAND_CMD_LOCK 0x2a
99 #define NAND_CMD_UNLOCK1 0x23
100 #define NAND_CMD_UNLOCK2 0x24
102 /* Extended commands for large page devices */
103 #define NAND_CMD_READSTART 0x30
104 #define NAND_CMD_RNDOUTSTART 0xE0
105 #define NAND_CMD_CACHEDPROG 0x15
107 #define NAND_CMD_NONE -1
110 #define NAND_STATUS_FAIL 0x01
111 #define NAND_STATUS_FAIL_N1 0x02
112 #define NAND_STATUS_TRUE_READY 0x20
113 #define NAND_STATUS_READY 0x40
114 #define NAND_STATUS_WP 0x80
117 * Constants for ECC_MODES
123 NAND_ECC_HW_SYNDROME,
124 NAND_ECC_HW_OOB_FIRST,
129 * Constants for Hardware ECC
131 /* Reset Hardware ECC for read */
132 #define NAND_ECC_READ 0
133 /* Reset Hardware ECC for write */
134 #define NAND_ECC_WRITE 1
135 /* Enable Hardware ECC before syndrome is read back from flash */
136 #define NAND_ECC_READSYN 2
138 /* Bit mask for flags passed to do_nand_read_ecc */
139 #define NAND_GET_DEVICE 0x80
143 * Option constants for bizarre disfunctionality and real
146 /* Buswidth is 16 bit */
147 #define NAND_BUSWIDTH_16 0x00000002
148 /* Chip has cache program function */
149 #define NAND_CACHEPRG 0x00000008
151 * Chip requires ready check on read (for auto-incremented sequential read).
152 * True only for small page devices; large page devices do not support
155 #define NAND_NEED_READRDY 0x00000100
157 /* Chip does not allow subpage writes */
158 #define NAND_NO_SUBPAGE_WRITE 0x00000200
160 /* Device is one of 'new' xD cards that expose fake nand command set */
161 #define NAND_BROKEN_XD 0x00000400
163 /* Device behaves just like nand, but is readonly */
164 #define NAND_ROM 0x00000800
166 /* Device supports subpage reads */
167 #define NAND_SUBPAGE_READ 0x00001000
169 /* Options valid for Samsung large page devices */
170 #define NAND_SAMSUNG_LP_OPTIONS NAND_CACHEPRG
172 /* Macros to identify the above */
173 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
174 #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
176 /* Non chip related options */
177 /* This option skips the bbt scan during initialization. */
178 #define NAND_SKIP_BBTSCAN 0x00010000
180 * This option is defined if the board driver allocates its own buffers
181 * (e.g. because it needs them DMA-coherent).
183 #define NAND_OWN_BUFFERS 0x00020000
184 /* Chip may not exist, so silence any errors in scan */
185 #define NAND_SCAN_SILENT_NODEV 0x00040000
187 * Autodetect nand buswidth with readid/onfi.
188 * This suppose the driver will configure the hardware in 8 bits mode
189 * when calling nand_scan_ident, and update its configuration
190 * before calling nand_scan_tail.
192 #define NAND_BUSWIDTH_AUTO 0x00080000
194 /* Options set by nand scan */
195 /* Nand scan has allocated controller struct */
196 #define NAND_CONTROLLER_ALLOC 0x80000000
198 /* Cell info constants */
199 #define NAND_CI_CHIPNR_MSK 0x03
200 #define NAND_CI_CELLTYPE_MSK 0x0C
205 /* ONFI timing mode, used in both asynchronous and synchronous mode */
206 #define ONFI_TIMING_MODE_0 (1 << 0)
207 #define ONFI_TIMING_MODE_1 (1 << 1)
208 #define ONFI_TIMING_MODE_2 (1 << 2)
209 #define ONFI_TIMING_MODE_3 (1 << 3)
210 #define ONFI_TIMING_MODE_4 (1 << 4)
211 #define ONFI_TIMING_MODE_5 (1 << 5)
212 #define ONFI_TIMING_MODE_UNKNOWN (1 << 6)
214 /* ONFI feature address */
215 #define ONFI_FEATURE_ADDR_TIMING_MODE 0x1
217 /* ONFI subfeature parameters length */
218 #define ONFI_SUBFEATURE_PARAM_LEN 4
220 struct nand_onfi_params {
221 /* rev info and features block */
222 /* 'O' 'N' 'F' 'I' */
229 /* manufacturer information block */
230 char manufacturer[12];
236 /* memory organization block */
237 __le32 byte_per_page;
238 __le16 spare_bytes_per_page;
239 __le32 data_bytes_per_ppage;
240 __le16 spare_bytes_per_ppage;
241 __le32 pages_per_block;
242 __le32 blocks_per_lun;
247 __le16 block_endurance;
248 u8 guaranteed_good_blocks;
249 __le16 guaranteed_block_endurance;
250 u8 programs_per_page;
257 /* electrical parameter block */
258 u8 io_pin_capacitance_max;
259 __le16 async_timing_mode;
260 __le16 program_cache_timing_mode;
265 __le16 src_sync_timing_mode;
266 __le16 src_ssync_features;
267 __le16 clk_pin_capacitance_typ;
268 __le16 io_pin_capacitance_typ;
269 __le16 input_pin_capacitance_typ;
270 u8 input_pin_capacitance_max;
271 u8 driver_strenght_support;
280 } __attribute__((packed));
282 #define ONFI_CRC_BASE 0x4F4E
285 * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independent devices
286 * @lock: protection lock
287 * @active: the mtd device which holds the controller currently
288 * @wq: wait queue to sleep on if a NAND operation is in
289 * progress used instead of the per chip wait queue
290 * when a hw controller is available.
292 struct nand_hw_control {
294 struct nand_chip *active;
295 wait_queue_head_t wq;
299 * struct nand_ecc_ctrl - Control structure for ECC
301 * @steps: number of ECC steps per page
302 * @size: data bytes per ECC step
303 * @bytes: ECC bytes per step
304 * @strength: max number of correctible bits per ECC step
305 * @total: total number of ECC bytes per page
306 * @prepad: padding information for syndrome based ECC generators
307 * @postpad: padding information for syndrome based ECC generators
308 * @layout: ECC layout control struct pointer
309 * @priv: pointer to private ECC control data
310 * @hwctl: function to control hardware ECC generator. Must only
311 * be provided if an hardware ECC is available
312 * @calculate: function for ECC calculation or readback from ECC hardware
313 * @correct: function for ECC correction, matching to ECC generator (sw/hw)
314 * @read_page_raw: function to read a raw page without ECC
315 * @write_page_raw: function to write a raw page without ECC
316 * @read_page: function to read a page according to the ECC generator
317 * requirements; returns maximum number of bitflips corrected in
318 * any single ECC step, 0 if bitflips uncorrectable, -EIO hw error
319 * @read_subpage: function to read parts of the page covered by ECC;
320 * returns same as read_page()
321 * @write_subpage: function to write parts of the page covered by ECC.
322 * @write_page: function to write a page according to the ECC generator
324 * @write_oob_raw: function to write chip OOB data without ECC
325 * @read_oob_raw: function to read chip OOB data without ECC
326 * @read_oob: function to read chip OOB data
327 * @write_oob: function to write chip OOB data
329 struct nand_ecc_ctrl {
330 nand_ecc_modes_t mode;
338 struct nand_ecclayout *layout;
340 void (*hwctl)(struct mtd_info *mtd, int mode);
341 int (*calculate)(struct mtd_info *mtd, const uint8_t *dat,
343 int (*correct)(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc,
345 int (*read_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
346 uint8_t *buf, int oob_required, int page);
347 int (*write_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
348 const uint8_t *buf, int oob_required);
349 int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip,
350 uint8_t *buf, int oob_required, int page);
351 int (*read_subpage)(struct mtd_info *mtd, struct nand_chip *chip,
352 uint32_t offs, uint32_t len, uint8_t *buf);
353 int (*write_subpage)(struct mtd_info *mtd, struct nand_chip *chip,
354 uint32_t offset, uint32_t data_len,
355 const uint8_t *data_buf, int oob_required);
356 int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
357 const uint8_t *buf, int oob_required);
358 int (*write_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,
360 int (*read_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,
362 int (*read_oob)(struct mtd_info *mtd, struct nand_chip *chip, int page);
363 int (*write_oob)(struct mtd_info *mtd, struct nand_chip *chip,
368 * struct nand_buffers - buffer structure for read/write
369 * @ecccalc: buffer for calculated ECC
370 * @ecccode: buffer for ECC read from flash
371 * @databuf: buffer for data - dynamically sized
373 * Do not change the order of buffers. databuf and oobrbuf must be in
376 struct nand_buffers {
377 uint8_t ecccalc[NAND_MAX_OOBSIZE];
378 uint8_t ecccode[NAND_MAX_OOBSIZE];
379 uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE];
383 * struct nand_chip - NAND Private Flash Chip Data
384 * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the
386 * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the
388 * @read_byte: [REPLACEABLE] read one byte from the chip
389 * @read_word: [REPLACEABLE] read one word from the chip
390 * @write_buf: [REPLACEABLE] write data from the buffer to the chip
391 * @read_buf: [REPLACEABLE] read data from the chip into the buffer
392 * @select_chip: [REPLACEABLE] select chip nr
393 * @block_bad: [REPLACEABLE] check, if the block is bad
394 * @block_markbad: [REPLACEABLE] mark the block bad
395 * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific function for controlling
396 * ALE/CLE/nCE. Also used to write command and address
397 * @init_size: [BOARDSPECIFIC] hardwarespecific function for setting
398 * mtd->oobsize, mtd->writesize and so on.
399 * @id_data contains the 8 bytes values of NAND_CMD_READID.
400 * Return with the bus width.
401 * @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accessing
402 * device ready/busy line. If set to NULL no access to
403 * ready/busy is available and the ready/busy information
404 * is read from the chip status register.
405 * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing
406 * commands to the chip.
407 * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on
409 * @ecc: [BOARDSPECIFIC] ECC control structure
410 * @buffers: buffer structure for read/write
411 * @hwcontrol: platform-specific hardware control structure
412 * @erase_cmd: [INTERN] erase command write function, selectable due
414 * @scan_bbt: [REPLACEABLE] function to scan bad block table
415 * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transferring
416 * data from array to read regs (tR).
417 * @state: [INTERN] the current state of the NAND device
418 * @oob_poi: "poison value buffer," used for laying out OOB data
420 * @page_shift: [INTERN] number of address bits in a page (column
422 * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock
423 * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
424 * @chip_shift: [INTERN] number of address bits in one chip
425 * @options: [BOARDSPECIFIC] various chip options. They can partly
426 * be set to inform nand_scan about special functionality.
427 * See the defines for further explanation.
428 * @bbt_options: [INTERN] bad block specific options. All options used
429 * here must come from bbm.h. By default, these options
430 * will be copied to the appropriate nand_bbt_descr's.
431 * @badblockpos: [INTERN] position of the bad block marker in the oob
433 * @badblockbits: [INTERN] minimum number of set bits in a good block's
434 * bad block marker position; i.e., BBM == 11110111b is
435 * not bad when badblockbits == 7
436 * @cellinfo: [INTERN] MLC/multichip data from chip ident
437 * @numchips: [INTERN] number of physical chips
438 * @chipsize: [INTERN] the size of one chip for multichip arrays
439 * @pagemask: [INTERN] page number mask = number of (pages / chip) - 1
440 * @pagebuf: [INTERN] holds the pagenumber which is currently in
442 * @pagebuf_bitflips: [INTERN] holds the bitflip count for the page which is
443 * currently in data_buf.
444 * @subpagesize: [INTERN] holds the subpagesize
445 * @onfi_version: [INTERN] holds the chip ONFI version (BCD encoded),
446 * non 0 if ONFI supported.
447 * @onfi_params: [INTERN] holds the ONFI page parameter when ONFI is
448 * supported, 0 otherwise.
449 * @onfi_set_features: [REPLACEABLE] set the features for ONFI nand
450 * @onfi_get_features: [REPLACEABLE] get the features for ONFI nand
451 * @ecclayout: [REPLACEABLE] the default ECC placement scheme
452 * @bbt: [INTERN] bad block table pointer
453 * @bbt_td: [REPLACEABLE] bad block table descriptor for flash
455 * @bbt_md: [REPLACEABLE] bad block table mirror descriptor
456 * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial
458 * @controller: [REPLACEABLE] a pointer to a hardware controller
459 * structure which is shared among multiple independent
461 * @priv: [OPTIONAL] pointer to private chip data
462 * @errstat: [OPTIONAL] hardware specific function to perform
463 * additional error status checks (determine if errors are
465 * @write_page: [REPLACEABLE] High-level page write function
469 void __iomem *IO_ADDR_R;
470 void __iomem *IO_ADDR_W;
472 uint8_t (*read_byte)(struct mtd_info *mtd);
473 u16 (*read_word)(struct mtd_info *mtd);
474 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
475 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
476 void (*select_chip)(struct mtd_info *mtd, int chip);
477 int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip);
478 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
479 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
480 int (*init_size)(struct mtd_info *mtd, struct nand_chip *this,
482 int (*dev_ready)(struct mtd_info *mtd);
483 void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column,
485 int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
486 void (*erase_cmd)(struct mtd_info *mtd, int page);
487 int (*scan_bbt)(struct mtd_info *mtd);
488 int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state,
489 int status, int page);
490 int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
491 uint32_t offset, int data_len, const uint8_t *buf,
492 int oob_required, int page, int cached, int raw);
493 int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
494 int feature_addr, uint8_t *subfeature_para);
495 int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
496 int feature_addr, uint8_t *subfeature_para);
499 unsigned int options;
500 unsigned int bbt_options;
503 int phys_erase_shift;
510 unsigned int pagebuf_bitflips;
517 struct nand_onfi_params onfi_params;
522 struct nand_hw_control *controller;
523 struct nand_ecclayout *ecclayout;
525 struct nand_ecc_ctrl ecc;
526 struct nand_buffers *buffers;
527 struct nand_hw_control hwcontrol;
530 struct nand_bbt_descr *bbt_td;
531 struct nand_bbt_descr *bbt_md;
533 struct nand_bbt_descr *badblock_pattern;
539 * NAND Flash Manufacturer ID Codes
541 #define NAND_MFR_TOSHIBA 0x98
542 #define NAND_MFR_SAMSUNG 0xec
543 #define NAND_MFR_FUJITSU 0x04
544 #define NAND_MFR_NATIONAL 0x8f
545 #define NAND_MFR_RENESAS 0x07
546 #define NAND_MFR_STMICRO 0x20
547 #define NAND_MFR_HYNIX 0xad
548 #define NAND_MFR_MICRON 0x2c
549 #define NAND_MFR_AMD 0x01
550 #define NAND_MFR_MACRONIX 0xc2
551 #define NAND_MFR_EON 0x92
553 /* The maximum expected count of bytes in the NAND ID sequence */
554 #define NAND_MAX_ID_LEN 8
557 * A helper for defining older NAND chips where the second ID byte fully
558 * defined the chip, including the geometry (chip size, eraseblock size, page
559 * size). All these chips have 512 bytes NAND page size.
561 #define LEGACY_ID_NAND(nm, devid, chipsz, erasesz, opts) \
562 { .name = (nm), {{ .dev_id = (devid) }}, .pagesize = 512, \
563 .chipsize = (chipsz), .erasesize = (erasesz), .options = (opts) }
566 * A helper for defining newer chips which report their page size and
567 * eraseblock size via the extended ID bytes.
569 * The real difference between LEGACY_ID_NAND and EXTENDED_ID_NAND is that with
570 * EXTENDED_ID_NAND, manufacturers overloaded the same device ID so that the
571 * device ID now only represented a particular total chip size (and voltage,
572 * buswidth), and the page size, eraseblock size, and OOB size could vary while
573 * using the same device ID.
575 #define EXTENDED_ID_NAND(nm, devid, chipsz, opts) \
576 { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \
580 * struct nand_flash_dev - NAND Flash Device ID Structure
581 * @name: a human-readable name of the NAND chip
582 * @dev_id: the device ID (the second byte of the full chip ID array)
583 * @mfr_id: manufecturer ID part of the full chip ID array (refers the same
584 * memory address as @id[0])
585 * @dev_id: device ID part of the full chip ID array (refers the same memory
587 * @id: full device ID array
588 * @pagesize: size of the NAND page in bytes; if 0, then the real page size (as
589 * well as the eraseblock size) is determined from the extended NAND
591 * @chipsize: total chip size in MiB
592 * @erasesize: eraseblock size in bytes (determined from the extended ID if 0)
593 * @options: stores various chip bit options
594 * @id_len: The valid length of the @id.
597 struct nand_flash_dev {
604 uint8_t id[NAND_MAX_ID_LEN];
606 unsigned int pagesize;
607 unsigned int chipsize;
608 unsigned int erasesize;
609 unsigned int options;
615 * struct nand_manufacturers - NAND Flash Manufacturer ID Structure
616 * @name: Manufacturer name
617 * @id: manufacturer ID code of device.
619 struct nand_manufacturers {
624 extern struct nand_flash_dev nand_flash_ids[];
625 extern struct nand_manufacturers nand_manuf_ids[];
627 extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd);
628 extern int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
629 extern int nand_default_bbt(struct mtd_info *mtd);
630 extern int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt);
631 extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
633 extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
634 size_t *retlen, uint8_t *buf);
637 * struct platform_nand_chip - chip level device structure
638 * @nr_chips: max. number of chips to scan for
639 * @chip_offset: chip number offset
640 * @nr_partitions: number of partitions pointed to by partitions (or zero)
641 * @partitions: mtd partition list
642 * @chip_delay: R/B delay value in us
643 * @options: Option flags, e.g. 16bit buswidth
644 * @bbt_options: BBT option flags, e.g. NAND_BBT_USE_FLASH
645 * @ecclayout: ECC layout info structure
646 * @part_probe_types: NULL-terminated array of probe types
648 struct platform_nand_chip {
652 struct mtd_partition *partitions;
653 struct nand_ecclayout *ecclayout;
655 unsigned int options;
656 unsigned int bbt_options;
657 const char **part_probe_types;
661 struct platform_device;
664 * struct platform_nand_ctrl - controller level device structure
665 * @probe: platform specific function to probe/setup hardware
666 * @remove: platform specific function to remove/teardown hardware
667 * @hwcontrol: platform specific hardware control structure
668 * @dev_ready: platform specific function to read ready/busy pin
669 * @select_chip: platform specific chip select function
670 * @cmd_ctrl: platform specific function for controlling
671 * ALE/CLE/nCE. Also used to write command and address
672 * @write_buf: platform specific function for write buffer
673 * @read_buf: platform specific function for read buffer
674 * @read_byte: platform specific function to read one byte from chip
675 * @priv: private data to transport driver specific settings
677 * All fields are optional and depend on the hardware driver requirements
679 struct platform_nand_ctrl {
680 int (*probe)(struct platform_device *pdev);
681 void (*remove)(struct platform_device *pdev);
682 void (*hwcontrol)(struct mtd_info *mtd, int cmd);
683 int (*dev_ready)(struct mtd_info *mtd);
684 void (*select_chip)(struct mtd_info *mtd, int chip);
685 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
686 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
687 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
688 unsigned char (*read_byte)(struct mtd_info *mtd);
693 * struct platform_nand_data - container structure for platform-specific data
694 * @chip: chip level chip structure
695 * @ctrl: controller level device structure
697 struct platform_nand_data {
698 struct platform_nand_chip chip;
699 struct platform_nand_ctrl ctrl;
702 /* Some helpers to access the data structures */
704 struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
706 struct nand_chip *chip = mtd->priv;
711 /* return the supported asynchronous timing mode. */
712 static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
714 if (!chip->onfi_version)
715 return ONFI_TIMING_MODE_UNKNOWN;
716 return le16_to_cpu(chip->onfi_params.async_timing_mode);
719 /* return the supported synchronous timing mode. */
720 static inline int onfi_get_sync_timing_mode(struct nand_chip *chip)
722 if (!chip->onfi_version)
723 return ONFI_TIMING_MODE_UNKNOWN;
724 return le16_to_cpu(chip->onfi_params.src_sync_timing_mode);
727 #endif /* __LINUX_MTD_NAND_H */