6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 * Contains standard defines and IDs for NAND flash devices
16 #ifndef __LINUX_MTD_RAWNAND_H
17 #define __LINUX_MTD_RAWNAND_H
19 #include <linux/wait.h>
20 #include <linux/spinlock.h>
21 #include <linux/mtd/mtd.h>
22 #include <linux/mtd/flashchip.h>
23 #include <linux/mtd/bbm.h>
24 #include <linux/types.h>
27 struct nand_flash_dev;
30 /* Scan and identify a NAND device */
31 int nand_scan_with_ids(struct mtd_info *mtd, int max_chips,
32 struct nand_flash_dev *ids);
34 static inline int nand_scan(struct mtd_info *mtd, int max_chips)
36 return nand_scan_with_ids(mtd, max_chips, NULL);
40 * Separate phases of nand_scan(), allowing board driver to intervene
41 * and override command or ECC setup according to flash type.
43 int nand_scan_ident(struct mtd_info *mtd, int max_chips,
44 struct nand_flash_dev *table);
45 int nand_scan_tail(struct mtd_info *mtd);
47 /* Unregister the MTD device and free resources held by the NAND device */
48 void nand_release(struct mtd_info *mtd);
50 /* Internal helper for board drivers which need to override command function */
51 void nand_wait_ready(struct mtd_info *mtd);
53 /* The maximum number of NAND chips in an array */
54 #define NAND_MAX_CHIPS 8
57 * Constants for hardware specific CLE/ALE/NCE function
59 * These are bits which can be or'ed to set/clear multiple
62 /* Select the chip by setting nCE to low */
64 /* Select the command latch by setting CLE to high */
66 /* Select the address latch by setting ALE to high */
69 #define NAND_CTRL_CLE (NAND_NCE | NAND_CLE)
70 #define NAND_CTRL_ALE (NAND_NCE | NAND_ALE)
71 #define NAND_CTRL_CHANGE 0x80
74 * Standard NAND flash commands
76 #define NAND_CMD_READ0 0
77 #define NAND_CMD_READ1 1
78 #define NAND_CMD_RNDOUT 5
79 #define NAND_CMD_PAGEPROG 0x10
80 #define NAND_CMD_READOOB 0x50
81 #define NAND_CMD_ERASE1 0x60
82 #define NAND_CMD_STATUS 0x70
83 #define NAND_CMD_SEQIN 0x80
84 #define NAND_CMD_RNDIN 0x85
85 #define NAND_CMD_READID 0x90
86 #define NAND_CMD_ERASE2 0xd0
87 #define NAND_CMD_PARAM 0xec
88 #define NAND_CMD_GET_FEATURES 0xee
89 #define NAND_CMD_SET_FEATURES 0xef
90 #define NAND_CMD_RESET 0xff
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
97 #define NAND_CMD_NONE -1
100 #define NAND_STATUS_FAIL 0x01
101 #define NAND_STATUS_FAIL_N1 0x02
102 #define NAND_STATUS_TRUE_READY 0x20
103 #define NAND_STATUS_READY 0x40
104 #define NAND_STATUS_WP 0x80
106 #define NAND_DATA_IFACE_CHECK_ONLY -1
109 * Constants for ECC_MODES
115 NAND_ECC_HW_SYNDROME,
116 NAND_ECC_HW_OOB_FIRST,
127 * Constants for Hardware ECC
129 /* Reset Hardware ECC for read */
130 #define NAND_ECC_READ 0
131 /* Reset Hardware ECC for write */
132 #define NAND_ECC_WRITE 1
133 /* Enable Hardware ECC before syndrome is read back from flash */
134 #define NAND_ECC_READSYN 2
137 * Enable generic NAND 'page erased' check. This check is only done when
138 * ecc.correct() returns -EBADMSG.
139 * Set this flag if your implementation does not fix bitflips in erased
140 * pages and you want to rely on the default implementation.
142 #define NAND_ECC_GENERIC_ERASED_CHECK BIT(0)
143 #define NAND_ECC_MAXIMIZE BIT(1)
145 /* Bit mask for flags passed to do_nand_read_ecc */
146 #define NAND_GET_DEVICE 0x80
150 * Option constants for bizarre disfunctionality and real
153 /* Buswidth is 16 bit */
154 #define NAND_BUSWIDTH_16 0x00000002
155 /* Chip has cache program function */
156 #define NAND_CACHEPRG 0x00000008
158 * Chip requires ready check on read (for auto-incremented sequential read).
159 * True only for small page devices; large page devices do not support
162 #define NAND_NEED_READRDY 0x00000100
164 /* Chip does not allow subpage writes */
165 #define NAND_NO_SUBPAGE_WRITE 0x00000200
167 /* Device is one of 'new' xD cards that expose fake nand command set */
168 #define NAND_BROKEN_XD 0x00000400
170 /* Device behaves just like nand, but is readonly */
171 #define NAND_ROM 0x00000800
173 /* Device supports subpage reads */
174 #define NAND_SUBPAGE_READ 0x00001000
177 * Some MLC NANDs need data scrambling to limit bitflips caused by repeated
180 #define NAND_NEED_SCRAMBLING 0x00002000
182 /* Device needs 3rd row address cycle */
183 #define NAND_ROW_ADDR_3 0x00004000
185 /* Options valid for Samsung large page devices */
186 #define NAND_SAMSUNG_LP_OPTIONS NAND_CACHEPRG
188 /* Macros to identify the above */
189 #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
190 #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
191 #define NAND_HAS_SUBPAGE_WRITE(chip) !((chip)->options & NAND_NO_SUBPAGE_WRITE)
193 /* Non chip related options */
194 /* This option skips the bbt scan during initialization. */
195 #define NAND_SKIP_BBTSCAN 0x00010000
196 /* Chip may not exist, so silence any errors in scan */
197 #define NAND_SCAN_SILENT_NODEV 0x00040000
199 * Autodetect nand buswidth with readid/onfi.
200 * This suppose the driver will configure the hardware in 8 bits mode
201 * when calling nand_scan_ident, and update its configuration
202 * before calling nand_scan_tail.
204 #define NAND_BUSWIDTH_AUTO 0x00080000
206 * This option could be defined by controller drivers to protect against
207 * kmap'ed, vmalloc'ed highmem buffers being passed from upper layers
209 #define NAND_USE_BOUNCE_BUFFER 0x00100000
212 * In case your controller is implementing ->cmd_ctrl() and is relying on the
213 * default ->cmdfunc() implementation, you may want to let the core handle the
214 * tCCS delay which is required when a column change (RNDIN or RNDOUT) is
216 * If your controller already takes care of this delay, you don't need to set
219 #define NAND_WAIT_TCCS 0x00200000
221 /* Options set by nand scan */
222 /* Nand scan has allocated controller struct */
223 #define NAND_CONTROLLER_ALLOC 0x80000000
225 /* Cell info constants */
226 #define NAND_CI_CHIPNR_MSK 0x03
227 #define NAND_CI_CELLTYPE_MSK 0x0C
228 #define NAND_CI_CELLTYPE_SHIFT 2
234 #define ONFI_FEATURE_16_BIT_BUS (1 << 0)
235 #define ONFI_FEATURE_EXT_PARAM_PAGE (1 << 7)
237 /* ONFI timing mode, used in both asynchronous and synchronous mode */
238 #define ONFI_TIMING_MODE_0 (1 << 0)
239 #define ONFI_TIMING_MODE_1 (1 << 1)
240 #define ONFI_TIMING_MODE_2 (1 << 2)
241 #define ONFI_TIMING_MODE_3 (1 << 3)
242 #define ONFI_TIMING_MODE_4 (1 << 4)
243 #define ONFI_TIMING_MODE_5 (1 << 5)
244 #define ONFI_TIMING_MODE_UNKNOWN (1 << 6)
246 /* ONFI feature number/address */
247 #define ONFI_FEATURE_NUMBER 256
248 #define ONFI_FEATURE_ADDR_TIMING_MODE 0x1
250 /* Vendor-specific feature address (Micron) */
251 #define ONFI_FEATURE_ADDR_READ_RETRY 0x89
252 #define ONFI_FEATURE_ON_DIE_ECC 0x90
253 #define ONFI_FEATURE_ON_DIE_ECC_EN BIT(3)
255 /* ONFI subfeature parameters length */
256 #define ONFI_SUBFEATURE_PARAM_LEN 4
258 /* ONFI optional commands SET/GET FEATURES supported? */
259 #define ONFI_OPT_CMD_SET_GET_FEATURES (1 << 2)
261 struct nand_onfi_params {
262 /* rev info and features block */
263 /* 'O' 'N' 'F' 'I' */
269 __le16 ext_param_page_length; /* since ONFI 2.1 */
270 u8 num_of_param_pages; /* since ONFI 2.1 */
273 /* manufacturer information block */
274 char manufacturer[12];
280 /* memory organization block */
281 __le32 byte_per_page;
282 __le16 spare_bytes_per_page;
283 __le32 data_bytes_per_ppage;
284 __le16 spare_bytes_per_ppage;
285 __le32 pages_per_block;
286 __le32 blocks_per_lun;
291 __le16 block_endurance;
292 u8 guaranteed_good_blocks;
293 __le16 guaranteed_block_endurance;
294 u8 programs_per_page;
301 /* electrical parameter block */
302 u8 io_pin_capacitance_max;
303 __le16 async_timing_mode;
304 __le16 program_cache_timing_mode;
309 __le16 src_sync_timing_mode;
310 u8 src_ssync_features;
311 __le16 clk_pin_capacitance_typ;
312 __le16 io_pin_capacitance_typ;
313 __le16 input_pin_capacitance_typ;
314 u8 input_pin_capacitance_max;
315 u8 driver_strength_support;
321 __le16 vendor_revision;
327 #define ONFI_CRC_BASE 0x4F4E
329 /* Extended ECC information Block Definition (since ONFI 2.1) */
330 struct onfi_ext_ecc_info {
334 __le16 block_endurance;
338 #define ONFI_SECTION_TYPE_0 0 /* Unused section. */
339 #define ONFI_SECTION_TYPE_1 1 /* for additional sections. */
340 #define ONFI_SECTION_TYPE_2 2 /* for ECC information. */
341 struct onfi_ext_section {
346 #define ONFI_EXT_SECTION_MAX 8
348 /* Extended Parameter Page Definition (since ONFI 2.1) */
349 struct onfi_ext_param_page {
351 u8 sig[4]; /* 'E' 'P' 'P' 'S' */
353 struct onfi_ext_section sections[ONFI_EXT_SECTION_MAX];
356 * The actual size of the Extended Parameter Page is in
357 * @ext_param_page_length of nand_onfi_params{}.
358 * The following are the variable length sections.
359 * So we do not add any fields below. Please see the ONFI spec.
363 struct jedec_ecc_info {
367 __le16 block_endurance;
372 #define JEDEC_FEATURE_16_BIT_BUS (1 << 0)
374 struct nand_jedec_params {
375 /* rev info and features block */
376 /* 'J' 'E' 'S' 'D' */
382 u8 num_of_param_pages;
385 /* manufacturer information block */
386 char manufacturer[12];
391 /* memory organization block */
392 __le32 byte_per_page;
393 __le16 spare_bytes_per_page;
395 __le32 pages_per_block;
396 __le32 blocks_per_lun;
400 u8 programs_per_page;
402 u8 multi_plane_op_attr;
405 /* electrical parameter block */
406 __le16 async_sdr_speed_grade;
407 __le16 toggle_ddr_speed_grade;
408 __le16 sync_ddr_speed_grade;
409 u8 async_sdr_features;
410 u8 toggle_ddr_features;
411 u8 sync_ddr_features;
415 __le16 t_r_multi_plane;
417 __le16 io_pin_capacitance_typ;
418 __le16 input_pin_capacitance_typ;
419 __le16 clk_pin_capacitance_typ;
420 u8 driver_strength_support;
424 /* ECC and endurance block */
425 u8 guaranteed_good_blocks;
426 __le16 guaranteed_block_endurance;
427 struct jedec_ecc_info ecc_info[4];
434 __le16 vendor_rev_num;
437 /* CRC for Parameter Page */
442 * struct onfi_params - ONFI specific parameters that will be reused
443 * @version: ONFI version (BCD encoded), 0 if ONFI is not supported
444 * @tPROG: Page program time
445 * @tBERS: Block erase time
446 * @tR: Page read time
447 * @tCCS: Change column setup time
448 * @async_timing_mode: Supported asynchronous timing mode
449 * @vendor_revision: Vendor specific revision number
450 * @vendor: Vendor specific data
458 u16 async_timing_mode;
464 * struct nand_parameters - NAND generic parameters from the parameter page
466 * @supports_set_get_features: The NAND chip supports setting/getting features
467 * @set_feature_list: Bitmap of features that can be set
468 * @get_feature_list: Bitmap of features that can be get
469 * @onfi: ONFI specific parameters
471 struct nand_parameters {
472 /* Generic parameters */
474 bool supports_set_get_features;
475 DECLARE_BITMAP(set_feature_list, ONFI_FEATURE_NUMBER);
476 DECLARE_BITMAP(get_feature_list, ONFI_FEATURE_NUMBER);
478 /* ONFI parameters */
479 struct onfi_params onfi;
482 /* The maximum expected count of bytes in the NAND ID sequence */
483 #define NAND_MAX_ID_LEN 8
486 * struct nand_id - NAND id structure
487 * @data: buffer containing the id bytes.
491 u8 data[NAND_MAX_ID_LEN];
496 * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independent devices
497 * @lock: protection lock
498 * @active: the mtd device which holds the controller currently
499 * @wq: wait queue to sleep on if a NAND operation is in
500 * progress used instead of the per chip wait queue
501 * when a hw controller is available.
503 struct nand_hw_control {
505 struct nand_chip *active;
506 wait_queue_head_t wq;
509 static inline void nand_hw_control_init(struct nand_hw_control *nfc)
512 spin_lock_init(&nfc->lock);
513 init_waitqueue_head(&nfc->wq);
517 * struct nand_ecc_step_info - ECC step information of ECC engine
518 * @stepsize: data bytes per ECC step
519 * @strengths: array of supported strengths
520 * @nstrengths: number of supported strengths
522 struct nand_ecc_step_info {
524 const int *strengths;
529 * struct nand_ecc_caps - capability of ECC engine
530 * @stepinfos: array of ECC step information
531 * @nstepinfos: number of ECC step information
532 * @calc_ecc_bytes: driver's hook to calculate ECC bytes per step
534 struct nand_ecc_caps {
535 const struct nand_ecc_step_info *stepinfos;
537 int (*calc_ecc_bytes)(int step_size, int strength);
540 /* a shorthand to generate struct nand_ecc_caps with only one ECC stepsize */
541 #define NAND_ECC_CAPS_SINGLE(__name, __calc, __step, ...) \
542 static const int __name##_strengths[] = { __VA_ARGS__ }; \
543 static const struct nand_ecc_step_info __name##_stepinfo = { \
544 .stepsize = __step, \
545 .strengths = __name##_strengths, \
546 .nstrengths = ARRAY_SIZE(__name##_strengths), \
548 static const struct nand_ecc_caps __name = { \
549 .stepinfos = &__name##_stepinfo, \
551 .calc_ecc_bytes = __calc, \
555 * struct nand_ecc_ctrl - Control structure for ECC
557 * @algo: ECC algorithm
558 * @steps: number of ECC steps per page
559 * @size: data bytes per ECC step
560 * @bytes: ECC bytes per step
561 * @strength: max number of correctible bits per ECC step
562 * @total: total number of ECC bytes per page
563 * @prepad: padding information for syndrome based ECC generators
564 * @postpad: padding information for syndrome based ECC generators
565 * @options: ECC specific options (see NAND_ECC_XXX flags defined above)
566 * @priv: pointer to private ECC control data
567 * @calc_buf: buffer for calculated ECC, size is oobsize.
568 * @code_buf: buffer for ECC read from flash, size is oobsize.
569 * @hwctl: function to control hardware ECC generator. Must only
570 * be provided if an hardware ECC is available
571 * @calculate: function for ECC calculation or readback from ECC hardware
572 * @correct: function for ECC correction, matching to ECC generator (sw/hw).
573 * Should return a positive number representing the number of
574 * corrected bitflips, -EBADMSG if the number of bitflips exceed
575 * ECC strength, or any other error code if the error is not
576 * directly related to correction.
577 * If -EBADMSG is returned the input buffers should be left
579 * @read_page_raw: function to read a raw page without ECC. This function
580 * should hide the specific layout used by the ECC
581 * controller and always return contiguous in-band and
582 * out-of-band data even if they're not stored
583 * contiguously on the NAND chip (e.g.
584 * NAND_ECC_HW_SYNDROME interleaves in-band and
586 * @write_page_raw: function to write a raw page without ECC. This function
587 * should hide the specific layout used by the ECC
588 * controller and consider the passed data as contiguous
589 * in-band and out-of-band data. ECC controller is
590 * responsible for doing the appropriate transformations
591 * to adapt to its specific layout (e.g.
592 * NAND_ECC_HW_SYNDROME interleaves in-band and
594 * @read_page: function to read a page according to the ECC generator
595 * requirements; returns maximum number of bitflips corrected in
596 * any single ECC step, -EIO hw error
597 * @read_subpage: function to read parts of the page covered by ECC;
598 * returns same as read_page()
599 * @write_subpage: function to write parts of the page covered by ECC.
600 * @write_page: function to write a page according to the ECC generator
602 * @write_oob_raw: function to write chip OOB data without ECC
603 * @read_oob_raw: function to read chip OOB data without ECC
604 * @read_oob: function to read chip OOB data
605 * @write_oob: function to write chip OOB data
607 struct nand_ecc_ctrl {
608 nand_ecc_modes_t mode;
609 enum nand_ecc_algo algo;
617 unsigned int options;
621 void (*hwctl)(struct mtd_info *mtd, int mode);
622 int (*calculate)(struct mtd_info *mtd, const uint8_t *dat,
624 int (*correct)(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc,
626 int (*read_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
627 uint8_t *buf, int oob_required, int page);
628 int (*write_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
629 const uint8_t *buf, int oob_required, int page);
630 int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip,
631 uint8_t *buf, int oob_required, int page);
632 int (*read_subpage)(struct mtd_info *mtd, struct nand_chip *chip,
633 uint32_t offs, uint32_t len, uint8_t *buf, int page);
634 int (*write_subpage)(struct mtd_info *mtd, struct nand_chip *chip,
635 uint32_t offset, uint32_t data_len,
636 const uint8_t *data_buf, int oob_required, int page);
637 int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
638 const uint8_t *buf, int oob_required, int page);
639 int (*write_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,
641 int (*read_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,
643 int (*read_oob)(struct mtd_info *mtd, struct nand_chip *chip, int page);
644 int (*write_oob)(struct mtd_info *mtd, struct nand_chip *chip,
649 * struct nand_sdr_timings - SDR NAND chip timings
651 * This struct defines the timing requirements of a SDR NAND chip.
652 * These information can be found in every NAND datasheets and the timings
653 * meaning are described in the ONFI specifications:
654 * www.onfi.org/~/media/ONFI/specs/onfi_3_1_spec.pdf (chapter 4.15 Timing
657 * All these timings are expressed in picoseconds.
659 * @tBERS_max: Block erase time
660 * @tCCS_min: Change column setup time
661 * @tPROG_max: Page program time
662 * @tR_max: Page read time
663 * @tALH_min: ALE hold time
664 * @tADL_min: ALE to data loading time
665 * @tALS_min: ALE setup time
666 * @tAR_min: ALE to RE# delay
667 * @tCEA_max: CE# access time
668 * @tCEH_min: CE# high hold time
669 * @tCH_min: CE# hold time
670 * @tCHZ_max: CE# high to output hi-Z
671 * @tCLH_min: CLE hold time
672 * @tCLR_min: CLE to RE# delay
673 * @tCLS_min: CLE setup time
674 * @tCOH_min: CE# high to output hold
675 * @tCS_min: CE# setup time
676 * @tDH_min: Data hold time
677 * @tDS_min: Data setup time
678 * @tFEAT_max: Busy time for Set Features and Get Features
679 * @tIR_min: Output hi-Z to RE# low
680 * @tITC_max: Interface and Timing Mode Change time
681 * @tRC_min: RE# cycle time
682 * @tREA_max: RE# access time
683 * @tREH_min: RE# high hold time
684 * @tRHOH_min: RE# high to output hold
685 * @tRHW_min: RE# high to WE# low
686 * @tRHZ_max: RE# high to output hi-Z
687 * @tRLOH_min: RE# low to output hold
688 * @tRP_min: RE# pulse width
689 * @tRR_min: Ready to RE# low (data only)
690 * @tRST_max: Device reset time, measured from the falling edge of R/B# to the
691 * rising edge of R/B#.
692 * @tWB_max: WE# high to SR[6] low
693 * @tWC_min: WE# cycle time
694 * @tWH_min: WE# high hold time
695 * @tWHR_min: WE# high to RE# low
696 * @tWP_min: WE# pulse width
697 * @tWW_min: WP# transition to WE# low
699 struct nand_sdr_timings {
741 * enum nand_data_interface_type - NAND interface timing type
742 * @NAND_SDR_IFACE: Single Data Rate interface
744 enum nand_data_interface_type {
749 * struct nand_data_interface - NAND interface timing
750 * @type: type of the timing
751 * @timings: The timing, type according to @type
752 * @timings.sdr: Use it when @type is %NAND_SDR_IFACE.
754 struct nand_data_interface {
755 enum nand_data_interface_type type;
757 struct nand_sdr_timings sdr;
762 * nand_get_sdr_timings - get SDR timing from data interface
763 * @conf: The data interface
765 static inline const struct nand_sdr_timings *
766 nand_get_sdr_timings(const struct nand_data_interface *conf)
768 if (conf->type != NAND_SDR_IFACE)
769 return ERR_PTR(-EINVAL);
771 return &conf->timings.sdr;
775 * struct nand_manufacturer_ops - NAND Manufacturer operations
776 * @detect: detect the NAND memory organization and capabilities
777 * @init: initialize all vendor specific fields (like the ->read_retry()
778 * implementation) if any.
779 * @cleanup: the ->init() function may have allocated resources, ->cleanup()
780 * is here to let vendor specific code release those resources.
782 struct nand_manufacturer_ops {
783 void (*detect)(struct nand_chip *chip);
784 int (*init)(struct nand_chip *chip);
785 void (*cleanup)(struct nand_chip *chip);
789 * struct nand_op_cmd_instr - Definition of a command instruction
790 * @opcode: the command to issue in one cycle
792 struct nand_op_cmd_instr {
797 * struct nand_op_addr_instr - Definition of an address instruction
798 * @naddrs: length of the @addrs array
799 * @addrs: array containing the address cycles to issue
801 struct nand_op_addr_instr {
807 * struct nand_op_data_instr - Definition of a data instruction
808 * @len: number of data bytes to move
809 * @buf: buffer to fill
810 * @buf.in: buffer to fill when reading from the NAND chip
811 * @buf.out: buffer to read from when writing to the NAND chip
812 * @force_8bit: force 8-bit access
814 * Please note that "in" and "out" are inverted from the ONFI specification
815 * and are from the controller perspective, so a "in" is a read from the NAND
816 * chip while a "out" is a write to the NAND chip.
818 struct nand_op_data_instr {
828 * struct nand_op_waitrdy_instr - Definition of a wait ready instruction
829 * @timeout_ms: maximum delay while waiting for the ready/busy pin in ms
831 struct nand_op_waitrdy_instr {
832 unsigned int timeout_ms;
836 * enum nand_op_instr_type - Definition of all instruction types
837 * @NAND_OP_CMD_INSTR: command instruction
838 * @NAND_OP_ADDR_INSTR: address instruction
839 * @NAND_OP_DATA_IN_INSTR: data in instruction
840 * @NAND_OP_DATA_OUT_INSTR: data out instruction
841 * @NAND_OP_WAITRDY_INSTR: wait ready instruction
843 enum nand_op_instr_type {
846 NAND_OP_DATA_IN_INSTR,
847 NAND_OP_DATA_OUT_INSTR,
848 NAND_OP_WAITRDY_INSTR,
852 * struct nand_op_instr - Instruction object
853 * @type: the instruction type
854 * @ctx: extra data associated to the instruction. You'll have to use the
855 * appropriate element depending on @type
856 * @ctx.cmd: use it if @type is %NAND_OP_CMD_INSTR
857 * @ctx.addr: use it if @type is %NAND_OP_ADDR_INSTR
858 * @ctx.data: use it if @type is %NAND_OP_DATA_IN_INSTR
859 * or %NAND_OP_DATA_OUT_INSTR
860 * @ctx.waitrdy: use it if @type is %NAND_OP_WAITRDY_INSTR
861 * @delay_ns: delay the controller should apply after the instruction has been
862 * issued on the bus. Most modern controllers have internal timings
863 * control logic, and in this case, the controller driver can ignore
866 struct nand_op_instr {
867 enum nand_op_instr_type type;
869 struct nand_op_cmd_instr cmd;
870 struct nand_op_addr_instr addr;
871 struct nand_op_data_instr data;
872 struct nand_op_waitrdy_instr waitrdy;
874 unsigned int delay_ns;
878 * Special handling must be done for the WAITRDY timeout parameter as it usually
879 * is either tPROG (after a prog), tR (before a read), tRST (during a reset) or
880 * tBERS (during an erase) which all of them are u64 values that cannot be
881 * divided by usual kernel macros and must be handled with the special
882 * DIV_ROUND_UP_ULL() macro.
884 * Cast to type of dividend is needed here to guarantee that the result won't
885 * be an unsigned long long when the dividend is an unsigned long (or smaller),
886 * which is what the compiler does when it sees ternary operator with 2
887 * different return types (picks the largest type to make sure there's no
890 #define __DIVIDE(dividend, divisor) ({ \
891 (__typeof__(dividend))(sizeof(dividend) <= sizeof(unsigned long) ? \
892 DIV_ROUND_UP(dividend, divisor) : \
893 DIV_ROUND_UP_ULL(dividend, divisor)); \
895 #define PSEC_TO_NSEC(x) __DIVIDE(x, 1000)
896 #define PSEC_TO_MSEC(x) __DIVIDE(x, 1000000000)
898 #define NAND_OP_CMD(id, ns) \
900 .type = NAND_OP_CMD_INSTR, \
901 .ctx.cmd.opcode = id, \
905 #define NAND_OP_ADDR(ncycles, cycles, ns) \
907 .type = NAND_OP_ADDR_INSTR, \
915 #define NAND_OP_DATA_IN(l, b, ns) \
917 .type = NAND_OP_DATA_IN_INSTR, \
921 .force_8bit = false, \
926 #define NAND_OP_DATA_OUT(l, b, ns) \
928 .type = NAND_OP_DATA_OUT_INSTR, \
932 .force_8bit = false, \
937 #define NAND_OP_8BIT_DATA_IN(l, b, ns) \
939 .type = NAND_OP_DATA_IN_INSTR, \
943 .force_8bit = true, \
948 #define NAND_OP_8BIT_DATA_OUT(l, b, ns) \
950 .type = NAND_OP_DATA_OUT_INSTR, \
954 .force_8bit = true, \
959 #define NAND_OP_WAIT_RDY(tout_ms, ns) \
961 .type = NAND_OP_WAITRDY_INSTR, \
962 .ctx.waitrdy.timeout_ms = tout_ms, \
967 * struct nand_subop - a sub operation
968 * @instrs: array of instructions
969 * @ninstrs: length of the @instrs array
970 * @first_instr_start_off: offset to start from for the first instruction
971 * of the sub-operation
972 * @last_instr_end_off: offset to end at (excluded) for the last instruction
973 * of the sub-operation
975 * Both @first_instr_start_off and @last_instr_end_off only apply to data or
976 * address instructions.
978 * When an operation cannot be handled as is by the NAND controller, it will
979 * be split by the parser into sub-operations which will be passed to the
983 const struct nand_op_instr *instrs;
984 unsigned int ninstrs;
985 unsigned int first_instr_start_off;
986 unsigned int last_instr_end_off;
989 int nand_subop_get_addr_start_off(const struct nand_subop *subop,
991 int nand_subop_get_num_addr_cyc(const struct nand_subop *subop,
993 int nand_subop_get_data_start_off(const struct nand_subop *subop,
995 int nand_subop_get_data_len(const struct nand_subop *subop,
999 * struct nand_op_parser_addr_constraints - Constraints for address instructions
1000 * @maxcycles: maximum number of address cycles the controller can issue in a
1003 struct nand_op_parser_addr_constraints {
1004 unsigned int maxcycles;
1008 * struct nand_op_parser_data_constraints - Constraints for data instructions
1009 * @maxlen: maximum data length that the controller can handle in a single step
1011 struct nand_op_parser_data_constraints {
1012 unsigned int maxlen;
1016 * struct nand_op_parser_pattern_elem - One element of a pattern
1017 * @type: the instructuction type
1018 * @optional: whether this element of the pattern is optional or mandatory
1019 * @ctx: address or data constraint
1020 * @ctx.addr: address constraint (number of cycles)
1021 * @ctx.data: data constraint (data length)
1023 struct nand_op_parser_pattern_elem {
1024 enum nand_op_instr_type type;
1027 struct nand_op_parser_addr_constraints addr;
1028 struct nand_op_parser_data_constraints data;
1032 #define NAND_OP_PARSER_PAT_CMD_ELEM(_opt) \
1034 .type = NAND_OP_CMD_INSTR, \
1038 #define NAND_OP_PARSER_PAT_ADDR_ELEM(_opt, _maxcycles) \
1040 .type = NAND_OP_ADDR_INSTR, \
1042 .ctx.addr.maxcycles = _maxcycles, \
1045 #define NAND_OP_PARSER_PAT_DATA_IN_ELEM(_opt, _maxlen) \
1047 .type = NAND_OP_DATA_IN_INSTR, \
1049 .ctx.data.maxlen = _maxlen, \
1052 #define NAND_OP_PARSER_PAT_DATA_OUT_ELEM(_opt, _maxlen) \
1054 .type = NAND_OP_DATA_OUT_INSTR, \
1056 .ctx.data.maxlen = _maxlen, \
1059 #define NAND_OP_PARSER_PAT_WAITRDY_ELEM(_opt) \
1061 .type = NAND_OP_WAITRDY_INSTR, \
1066 * struct nand_op_parser_pattern - NAND sub-operation pattern descriptor
1067 * @elems: array of pattern elements
1068 * @nelems: number of pattern elements in @elems array
1069 * @exec: the function that will issue a sub-operation
1071 * A pattern is a list of elements, each element reprensenting one instruction
1072 * with its constraints. The pattern itself is used by the core to match NAND
1073 * chip operation with NAND controller operations.
1074 * Once a match between a NAND controller operation pattern and a NAND chip
1075 * operation (or a sub-set of a NAND operation) is found, the pattern ->exec()
1076 * hook is called so that the controller driver can issue the operation on the
1079 * Controller drivers should declare as many patterns as they support and pass
1080 * this list of patterns (created with the help of the following macro) to
1081 * the nand_op_parser_exec_op() helper.
1083 struct nand_op_parser_pattern {
1084 const struct nand_op_parser_pattern_elem *elems;
1085 unsigned int nelems;
1086 int (*exec)(struct nand_chip *chip, const struct nand_subop *subop);
1089 #define NAND_OP_PARSER_PATTERN(_exec, ...) \
1092 .elems = (struct nand_op_parser_pattern_elem[]) { __VA_ARGS__ }, \
1093 .nelems = sizeof((struct nand_op_parser_pattern_elem[]) { __VA_ARGS__ }) / \
1094 sizeof(struct nand_op_parser_pattern_elem), \
1098 * struct nand_op_parser - NAND controller operation parser descriptor
1099 * @patterns: array of supported patterns
1100 * @npatterns: length of the @patterns array
1102 * The parser descriptor is just an array of supported patterns which will be
1103 * iterated by nand_op_parser_exec_op() everytime it tries to execute an
1104 * NAND operation (or tries to determine if a specific operation is supported).
1106 * It is worth mentioning that patterns will be tested in their declaration
1107 * order, and the first match will be taken, so it's important to order patterns
1108 * appropriately so that simple/inefficient patterns are placed at the end of
1109 * the list. Usually, this is where you put single instruction patterns.
1111 struct nand_op_parser {
1112 const struct nand_op_parser_pattern *patterns;
1113 unsigned int npatterns;
1116 #define NAND_OP_PARSER(...) \
1118 .patterns = (struct nand_op_parser_pattern[]) { __VA_ARGS__ }, \
1119 .npatterns = sizeof((struct nand_op_parser_pattern[]) { __VA_ARGS__ }) / \
1120 sizeof(struct nand_op_parser_pattern), \
1124 * struct nand_operation - NAND operation descriptor
1125 * @instrs: array of instructions to execute
1126 * @ninstrs: length of the @instrs array
1128 * The actual operation structure that will be passed to chip->exec_op().
1130 struct nand_operation {
1131 const struct nand_op_instr *instrs;
1132 unsigned int ninstrs;
1135 #define NAND_OPERATION(_instrs) \
1137 .instrs = _instrs, \
1138 .ninstrs = ARRAY_SIZE(_instrs), \
1141 int nand_op_parser_exec_op(struct nand_chip *chip,
1142 const struct nand_op_parser *parser,
1143 const struct nand_operation *op, bool check_only);
1146 * struct nand_chip - NAND Private Flash Chip Data
1147 * @mtd: MTD device registered to the MTD framework
1148 * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the
1150 * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the
1152 * @read_byte: [REPLACEABLE] read one byte from the chip
1153 * @read_word: [REPLACEABLE] read one word from the chip
1154 * @write_byte: [REPLACEABLE] write a single byte to the chip on the
1156 * @write_buf: [REPLACEABLE] write data from the buffer to the chip
1157 * @read_buf: [REPLACEABLE] read data from the chip into the buffer
1158 * @select_chip: [REPLACEABLE] select chip nr
1159 * @block_bad: [REPLACEABLE] check if a block is bad, using OOB markers
1160 * @block_markbad: [REPLACEABLE] mark a block bad
1161 * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific function for controlling
1162 * ALE/CLE/nCE. Also used to write command and address
1163 * @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accessing
1164 * device ready/busy line. If set to NULL no access to
1165 * ready/busy is available and the ready/busy information
1166 * is read from the chip status register.
1167 * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing
1168 * commands to the chip.
1169 * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on
1171 * @exec_op: controller specific method to execute NAND operations.
1172 * This method replaces ->cmdfunc(),
1173 * ->{read,write}_{buf,byte,word}(), ->dev_ready() and
1175 * @setup_read_retry: [FLASHSPECIFIC] flash (vendor) specific function for
1176 * setting the read-retry mode. Mostly needed for MLC NAND.
1177 * @ecc: [BOARDSPECIFIC] ECC control structure
1178 * @buf_align: minimum buffer alignment required by a platform
1179 * @hwcontrol: platform-specific hardware control structure
1180 * @erase: [REPLACEABLE] erase function
1181 * @scan_bbt: [REPLACEABLE] function to scan bad block table
1182 * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transferring
1183 * data from array to read regs (tR).
1184 * @state: [INTERN] the current state of the NAND device
1185 * @oob_poi: "poison value buffer," used for laying out OOB data
1187 * @page_shift: [INTERN] number of address bits in a page (column
1189 * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock
1190 * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
1191 * @chip_shift: [INTERN] number of address bits in one chip
1192 * @options: [BOARDSPECIFIC] various chip options. They can partly
1193 * be set to inform nand_scan about special functionality.
1194 * See the defines for further explanation.
1195 * @bbt_options: [INTERN] bad block specific options. All options used
1196 * here must come from bbm.h. By default, these options
1197 * will be copied to the appropriate nand_bbt_descr's.
1198 * @badblockpos: [INTERN] position of the bad block marker in the oob
1200 * @badblockbits: [INTERN] minimum number of set bits in a good block's
1201 * bad block marker position; i.e., BBM == 11110111b is
1202 * not bad when badblockbits == 7
1203 * @bits_per_cell: [INTERN] number of bits per cell. i.e., 1 means SLC.
1204 * @ecc_strength_ds: [INTERN] ECC correctability from the datasheet.
1205 * Minimum amount of bit errors per @ecc_step_ds guaranteed
1206 * to be correctable. If unknown, set to zero.
1207 * @ecc_step_ds: [INTERN] ECC step required by the @ecc_strength_ds,
1208 * also from the datasheet. It is the recommended ECC step
1209 * size, if known; if unknown, set to zero.
1210 * @onfi_timing_mode_default: [INTERN] default ONFI timing mode. This field is
1211 * set to the actually used ONFI mode if the chip is
1212 * ONFI compliant or deduced from the datasheet if
1213 * the NAND chip is not ONFI compliant.
1214 * @numchips: [INTERN] number of physical chips
1215 * @chipsize: [INTERN] the size of one chip for multichip arrays
1216 * @pagemask: [INTERN] page number mask = number of (pages / chip) - 1
1217 * @data_buf: [INTERN] buffer for data, size is (page size + oobsize).
1218 * @pagebuf: [INTERN] holds the pagenumber which is currently in
1220 * @pagebuf_bitflips: [INTERN] holds the bitflip count for the page which is
1221 * currently in data_buf.
1222 * @subpagesize: [INTERN] holds the subpagesize
1223 * @id: [INTERN] holds NAND ID
1224 * @parameters: [INTERN] holds generic parameters under an easily
1226 * @max_bb_per_die: [INTERN] the max number of bad blocks each die of a
1227 * this nand device will encounter their life times.
1228 * @blocks_per_die: [INTERN] The number of PEBs in a die
1229 * @data_interface: [INTERN] NAND interface timing information
1230 * @read_retries: [INTERN] the number of read retry modes supported
1231 * @set_features: [REPLACEABLE] set the NAND chip features
1232 * @get_features: [REPLACEABLE] get the NAND chip features
1233 * @setup_data_interface: [OPTIONAL] setup the data interface and timing. If
1234 * chipnr is set to %NAND_DATA_IFACE_CHECK_ONLY this
1235 * means the configuration should not be applied but
1237 * @bbt: [INTERN] bad block table pointer
1238 * @bbt_td: [REPLACEABLE] bad block table descriptor for flash
1240 * @bbt_md: [REPLACEABLE] bad block table mirror descriptor
1241 * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial
1243 * @controller: [REPLACEABLE] a pointer to a hardware controller
1244 * structure which is shared among multiple independent
1246 * @priv: [OPTIONAL] pointer to private chip data
1247 * @manufacturer: [INTERN] Contains manufacturer information
1248 * @manufacturer.desc: [INTERN] Contains manufacturer's description
1249 * @manufacturer.priv: [INTERN] Contains manufacturer private information
1253 struct mtd_info mtd;
1254 void __iomem *IO_ADDR_R;
1255 void __iomem *IO_ADDR_W;
1257 uint8_t (*read_byte)(struct mtd_info *mtd);
1258 u16 (*read_word)(struct mtd_info *mtd);
1259 void (*write_byte)(struct mtd_info *mtd, uint8_t byte);
1260 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
1261 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
1262 void (*select_chip)(struct mtd_info *mtd, int chip);
1263 int (*block_bad)(struct mtd_info *mtd, loff_t ofs);
1264 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
1265 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
1266 int (*dev_ready)(struct mtd_info *mtd);
1267 void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column,
1269 int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
1270 int (*exec_op)(struct nand_chip *chip,
1271 const struct nand_operation *op,
1273 int (*erase)(struct mtd_info *mtd, int page);
1274 int (*scan_bbt)(struct mtd_info *mtd);
1275 int (*set_features)(struct mtd_info *mtd, struct nand_chip *chip,
1276 int feature_addr, uint8_t *subfeature_para);
1277 int (*get_features)(struct mtd_info *mtd, struct nand_chip *chip,
1278 int feature_addr, uint8_t *subfeature_para);
1279 int (*setup_read_retry)(struct mtd_info *mtd, int retry_mode);
1280 int (*setup_data_interface)(struct mtd_info *mtd, int chipnr,
1281 const struct nand_data_interface *conf);
1284 unsigned int options;
1285 unsigned int bbt_options;
1288 int phys_erase_shift;
1289 int bbt_erase_shift;
1296 unsigned int pagebuf_bitflips;
1298 uint8_t bits_per_cell;
1299 uint16_t ecc_strength_ds;
1300 uint16_t ecc_step_ds;
1301 int onfi_timing_mode_default;
1306 struct nand_parameters parameters;
1310 struct nand_data_interface data_interface;
1317 struct nand_hw_control *controller;
1319 struct nand_ecc_ctrl ecc;
1320 unsigned long buf_align;
1321 struct nand_hw_control hwcontrol;
1324 struct nand_bbt_descr *bbt_td;
1325 struct nand_bbt_descr *bbt_md;
1327 struct nand_bbt_descr *badblock_pattern;
1332 const struct nand_manufacturer *desc;
1337 static inline int nand_exec_op(struct nand_chip *chip,
1338 const struct nand_operation *op)
1343 return chip->exec_op(chip, op, false);
1346 extern const struct mtd_ooblayout_ops nand_ooblayout_sp_ops;
1347 extern const struct mtd_ooblayout_ops nand_ooblayout_lp_ops;
1349 static inline void nand_set_flash_node(struct nand_chip *chip,
1350 struct device_node *np)
1352 mtd_set_of_node(&chip->mtd, np);
1355 static inline struct device_node *nand_get_flash_node(struct nand_chip *chip)
1357 return mtd_get_of_node(&chip->mtd);
1360 static inline struct nand_chip *mtd_to_nand(struct mtd_info *mtd)
1362 return container_of(mtd, struct nand_chip, mtd);
1365 static inline struct mtd_info *nand_to_mtd(struct nand_chip *chip)
1370 static inline void *nand_get_controller_data(struct nand_chip *chip)
1375 static inline void nand_set_controller_data(struct nand_chip *chip, void *priv)
1380 static inline void nand_set_manufacturer_data(struct nand_chip *chip,
1383 chip->manufacturer.priv = priv;
1386 static inline void *nand_get_manufacturer_data(struct nand_chip *chip)
1388 return chip->manufacturer.priv;
1392 * NAND Flash Manufacturer ID Codes
1394 #define NAND_MFR_TOSHIBA 0x98
1395 #define NAND_MFR_ESMT 0xc8
1396 #define NAND_MFR_SAMSUNG 0xec
1397 #define NAND_MFR_FUJITSU 0x04
1398 #define NAND_MFR_NATIONAL 0x8f
1399 #define NAND_MFR_RENESAS 0x07
1400 #define NAND_MFR_STMICRO 0x20
1401 #define NAND_MFR_HYNIX 0xad
1402 #define NAND_MFR_MICRON 0x2c
1403 #define NAND_MFR_AMD 0x01
1404 #define NAND_MFR_MACRONIX 0xc2
1405 #define NAND_MFR_EON 0x92
1406 #define NAND_MFR_SANDISK 0x45
1407 #define NAND_MFR_INTEL 0x89
1408 #define NAND_MFR_ATO 0x9b
1409 #define NAND_MFR_WINBOND 0xef
1413 * A helper for defining older NAND chips where the second ID byte fully
1414 * defined the chip, including the geometry (chip size, eraseblock size, page
1415 * size). All these chips have 512 bytes NAND page size.
1417 #define LEGACY_ID_NAND(nm, devid, chipsz, erasesz, opts) \
1418 { .name = (nm), {{ .dev_id = (devid) }}, .pagesize = 512, \
1419 .chipsize = (chipsz), .erasesize = (erasesz), .options = (opts) }
1422 * A helper for defining newer chips which report their page size and
1423 * eraseblock size via the extended ID bytes.
1425 * The real difference between LEGACY_ID_NAND and EXTENDED_ID_NAND is that with
1426 * EXTENDED_ID_NAND, manufacturers overloaded the same device ID so that the
1427 * device ID now only represented a particular total chip size (and voltage,
1428 * buswidth), and the page size, eraseblock size, and OOB size could vary while
1429 * using the same device ID.
1431 #define EXTENDED_ID_NAND(nm, devid, chipsz, opts) \
1432 { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \
1435 #define NAND_ECC_INFO(_strength, _step) \
1436 { .strength_ds = (_strength), .step_ds = (_step) }
1437 #define NAND_ECC_STRENGTH(type) ((type)->ecc.strength_ds)
1438 #define NAND_ECC_STEP(type) ((type)->ecc.step_ds)
1441 * struct nand_flash_dev - NAND Flash Device ID Structure
1442 * @name: a human-readable name of the NAND chip
1443 * @dev_id: the device ID (the second byte of the full chip ID array)
1444 * @mfr_id: manufecturer ID part of the full chip ID array (refers the same
1445 * memory address as @id[0])
1446 * @dev_id: device ID part of the full chip ID array (refers the same memory
1447 * address as @id[1])
1448 * @id: full device ID array
1449 * @pagesize: size of the NAND page in bytes; if 0, then the real page size (as
1450 * well as the eraseblock size) is determined from the extended NAND
1452 * @chipsize: total chip size in MiB
1453 * @erasesize: eraseblock size in bytes (determined from the extended ID if 0)
1454 * @options: stores various chip bit options
1455 * @id_len: The valid length of the @id.
1456 * @oobsize: OOB size
1457 * @ecc: ECC correctability and step information from the datasheet.
1458 * @ecc.strength_ds: The ECC correctability from the datasheet, same as the
1459 * @ecc_strength_ds in nand_chip{}.
1460 * @ecc.step_ds: The ECC step required by the @ecc.strength_ds, same as the
1461 * @ecc_step_ds in nand_chip{}, also from the datasheet.
1462 * For example, the "4bit ECC for each 512Byte" can be set with
1463 * NAND_ECC_INFO(4, 512).
1464 * @onfi_timing_mode_default: the default ONFI timing mode entered after a NAND
1465 * reset. Should be deduced from timings described
1469 struct nand_flash_dev {
1476 uint8_t id[NAND_MAX_ID_LEN];
1478 unsigned int pagesize;
1479 unsigned int chipsize;
1480 unsigned int erasesize;
1481 unsigned int options;
1485 uint16_t strength_ds;
1488 int onfi_timing_mode_default;
1492 * struct nand_manufacturer - NAND Flash Manufacturer structure
1493 * @name: Manufacturer name
1494 * @id: manufacturer ID code of device.
1495 * @ops: manufacturer operations
1497 struct nand_manufacturer {
1500 const struct nand_manufacturer_ops *ops;
1503 const struct nand_manufacturer *nand_get_manufacturer(u8 id);
1505 static inline const char *
1506 nand_manufacturer_name(const struct nand_manufacturer *manufacturer)
1508 return manufacturer ? manufacturer->name : "Unknown";
1511 extern struct nand_flash_dev nand_flash_ids[];
1513 extern const struct nand_manufacturer_ops toshiba_nand_manuf_ops;
1514 extern const struct nand_manufacturer_ops samsung_nand_manuf_ops;
1515 extern const struct nand_manufacturer_ops hynix_nand_manuf_ops;
1516 extern const struct nand_manufacturer_ops micron_nand_manuf_ops;
1517 extern const struct nand_manufacturer_ops amd_nand_manuf_ops;
1518 extern const struct nand_manufacturer_ops macronix_nand_manuf_ops;
1520 int nand_default_bbt(struct mtd_info *mtd);
1521 int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs);
1522 int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs);
1523 int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt);
1524 int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
1526 int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
1527 size_t *retlen, uint8_t *buf);
1530 * struct platform_nand_chip - chip level device structure
1531 * @nr_chips: max. number of chips to scan for
1532 * @chip_offset: chip number offset
1533 * @nr_partitions: number of partitions pointed to by partitions (or zero)
1534 * @partitions: mtd partition list
1535 * @chip_delay: R/B delay value in us
1536 * @options: Option flags, e.g. 16bit buswidth
1537 * @bbt_options: BBT option flags, e.g. NAND_BBT_USE_FLASH
1538 * @part_probe_types: NULL-terminated array of probe types
1540 struct platform_nand_chip {
1544 struct mtd_partition *partitions;
1546 unsigned int options;
1547 unsigned int bbt_options;
1548 const char **part_probe_types;
1551 /* Keep gcc happy */
1552 struct platform_device;
1555 * struct platform_nand_ctrl - controller level device structure
1556 * @probe: platform specific function to probe/setup hardware
1557 * @remove: platform specific function to remove/teardown hardware
1558 * @hwcontrol: platform specific hardware control structure
1559 * @dev_ready: platform specific function to read ready/busy pin
1560 * @select_chip: platform specific chip select function
1561 * @cmd_ctrl: platform specific function for controlling
1562 * ALE/CLE/nCE. Also used to write command and address
1563 * @write_buf: platform specific function for write buffer
1564 * @read_buf: platform specific function for read buffer
1565 * @read_byte: platform specific function to read one byte from chip
1566 * @priv: private data to transport driver specific settings
1568 * All fields are optional and depend on the hardware driver requirements
1570 struct platform_nand_ctrl {
1571 int (*probe)(struct platform_device *pdev);
1572 void (*remove)(struct platform_device *pdev);
1573 void (*hwcontrol)(struct mtd_info *mtd, int cmd);
1574 int (*dev_ready)(struct mtd_info *mtd);
1575 void (*select_chip)(struct mtd_info *mtd, int chip);
1576 void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
1577 void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
1578 void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
1579 unsigned char (*read_byte)(struct mtd_info *mtd);
1584 * struct platform_nand_data - container structure for platform-specific data
1585 * @chip: chip level chip structure
1586 * @ctrl: controller level device structure
1588 struct platform_nand_data {
1589 struct platform_nand_chip chip;
1590 struct platform_nand_ctrl ctrl;
1593 /* return the supported asynchronous timing mode. */
1594 static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
1596 if (!chip->parameters.onfi.version)
1597 return ONFI_TIMING_MODE_UNKNOWN;
1599 return chip->parameters.onfi.async_timing_mode;
1602 int onfi_fill_data_interface(struct nand_chip *chip,
1603 enum nand_data_interface_type type,
1607 * Check if it is a SLC nand.
1608 * The !nand_is_slc() can be used to check the MLC/TLC nand chips.
1609 * We do not distinguish the MLC and TLC now.
1611 static inline bool nand_is_slc(struct nand_chip *chip)
1613 WARN(chip->bits_per_cell == 0,
1614 "chip->bits_per_cell is used uninitialized\n");
1615 return chip->bits_per_cell == 1;
1619 * Check if the opcode's address should be sent only on the lower 8 bits
1620 * @command: opcode to check
1622 static inline int nand_opcode_8bits(unsigned int command)
1625 case NAND_CMD_READID:
1626 case NAND_CMD_PARAM:
1627 case NAND_CMD_GET_FEATURES:
1628 case NAND_CMD_SET_FEATURES:
1636 /* get timing characteristics from ONFI timing mode. */
1637 const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode);
1639 int nand_check_erased_ecc_chunk(void *data, int datalen,
1640 void *ecc, int ecclen,
1641 void *extraoob, int extraooblen,
1644 int nand_check_ecc_caps(struct nand_chip *chip,
1645 const struct nand_ecc_caps *caps, int oobavail);
1647 int nand_match_ecc_req(struct nand_chip *chip,
1648 const struct nand_ecc_caps *caps, int oobavail);
1650 int nand_maximize_ecc(struct nand_chip *chip,
1651 const struct nand_ecc_caps *caps, int oobavail);
1653 /* Default write_oob implementation */
1654 int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip, int page);
1656 /* Default write_oob syndrome implementation */
1657 int nand_write_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
1660 /* Default read_oob implementation */
1661 int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, int page);
1663 /* Default read_oob syndrome implementation */
1664 int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip,
1667 /* Wrapper to use in order for controllers/vendors to GET/SET FEATURES */
1668 int nand_get_features(struct nand_chip *chip, int addr, u8 *subfeature_param);
1669 int nand_set_features(struct nand_chip *chip, int addr, u8 *subfeature_param);
1670 /* Stub used by drivers that do not support GET/SET FEATURES operations */
1671 int nand_get_set_features_notsupp(struct mtd_info *mtd, struct nand_chip *chip,
1672 int addr, u8 *subfeature_param);
1674 /* Default read_page_raw implementation */
1675 int nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
1676 uint8_t *buf, int oob_required, int page);
1678 /* Default write_page_raw implementation */
1679 int nand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
1680 const uint8_t *buf, int oob_required, int page);
1682 /* Reset and initialize a NAND device */
1683 int nand_reset(struct nand_chip *chip, int chipnr);
1685 /* NAND operation helpers */
1686 int nand_reset_op(struct nand_chip *chip);
1687 int nand_readid_op(struct nand_chip *chip, u8 addr, void *buf,
1689 int nand_status_op(struct nand_chip *chip, u8 *status);
1690 int nand_exit_status_op(struct nand_chip *chip);
1691 int nand_erase_op(struct nand_chip *chip, unsigned int eraseblock);
1692 int nand_read_page_op(struct nand_chip *chip, unsigned int page,
1693 unsigned int offset_in_page, void *buf, unsigned int len);
1694 int nand_change_read_column_op(struct nand_chip *chip,
1695 unsigned int offset_in_page, void *buf,
1696 unsigned int len, bool force_8bit);
1697 int nand_read_oob_op(struct nand_chip *chip, unsigned int page,
1698 unsigned int offset_in_page, void *buf, unsigned int len);
1699 int nand_prog_page_begin_op(struct nand_chip *chip, unsigned int page,
1700 unsigned int offset_in_page, const void *buf,
1702 int nand_prog_page_end_op(struct nand_chip *chip);
1703 int nand_prog_page_op(struct nand_chip *chip, unsigned int page,
1704 unsigned int offset_in_page, const void *buf,
1706 int nand_change_write_column_op(struct nand_chip *chip,
1707 unsigned int offset_in_page, const void *buf,
1708 unsigned int len, bool force_8bit);
1709 int nand_read_data_op(struct nand_chip *chip, void *buf, unsigned int len,
1711 int nand_write_data_op(struct nand_chip *chip, const void *buf,
1712 unsigned int len, bool force_8bit);
1714 /* Free resources held by the NAND device */
1715 void nand_cleanup(struct nand_chip *chip);
1717 /* Default extended ID decoding function */
1718 void nand_decode_ext_id(struct nand_chip *chip);
1721 * External helper for controller drivers that have to implement the WAITRDY
1722 * instruction and have no physical pin to check it.
1724 int nand_soft_waitrdy(struct nand_chip *chip, unsigned long timeout_ms);
1726 #endif /* __LINUX_MTD_RAWNAND_H */