| /* |
| * linux/include/linux/mtd/nand.h |
| * |
| * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> |
| * Steven J. Hill <sjhill@realitydiluted.com> |
| * Thomas Gleixner <tglx@linutronix.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Info: |
| * Contains standard defines and IDs for NAND flash devices |
| * |
| * Changelog: |
| * See git changelog. |
| */ |
| #ifndef __LINUX_MTD_NAND_H |
| #define __LINUX_MTD_NAND_H |
| |
| #include <linux/wait.h> |
| #include <linux/spinlock.h> |
| #include <linux/mtd/mtd.h> |
| #include <linux/mtd/flashchip.h> |
| #include <linux/mtd/bbm.h> |
| |
| struct mtd_info; |
| struct nand_flash_dev; |
| /* Scan and identify a NAND device */ |
| extern int nand_scan(struct mtd_info *mtd, int max_chips); |
| /* |
| * Separate phases of nand_scan(), allowing board driver to intervene |
| * and override command or ECC setup according to flash type. |
| */ |
| extern int nand_scan_ident(struct mtd_info *mtd, int max_chips, |
| struct nand_flash_dev *table); |
| extern int nand_scan_tail(struct mtd_info *mtd); |
| |
| /* Free resources held by the NAND device */ |
| extern void nand_release(struct mtd_info *mtd); |
| |
| /* Internal helper for board drivers which need to override command function */ |
| extern void nand_wait_ready(struct mtd_info *mtd); |
| |
| /* locks all blocks present in the device */ |
| extern int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
| |
| /* unlocks specified locked blocks */ |
| extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
| |
| /* The maximum number of NAND chips in an array */ |
| #define NAND_MAX_CHIPS 8 |
| |
| /* |
| * This constant declares the max. oobsize / page, which |
| * is supported now. If you add a chip with bigger oobsize/page |
| * adjust this accordingly. |
| */ |
| #define NAND_MAX_OOBSIZE 640 |
| #define NAND_MAX_PAGESIZE 8192 |
| |
| /* |
| * Constants for hardware specific CLE/ALE/NCE function |
| * |
| * These are bits which can be or'ed to set/clear multiple |
| * bits in one go. |
| */ |
| /* Select the chip by setting nCE to low */ |
| #define NAND_NCE 0x01 |
| /* Select the command latch by setting CLE to high */ |
| #define NAND_CLE 0x02 |
| /* Select the address latch by setting ALE to high */ |
| #define NAND_ALE 0x04 |
| |
| #define NAND_CTRL_CLE (NAND_NCE | NAND_CLE) |
| #define NAND_CTRL_ALE (NAND_NCE | NAND_ALE) |
| #define NAND_CTRL_CHANGE 0x80 |
| |
| /* |
| * Standard NAND flash commands |
| */ |
| #define NAND_CMD_READ0 0 |
| #define NAND_CMD_READ1 1 |
| #define NAND_CMD_RNDOUT 5 |
| #define NAND_CMD_PAGEPROG 0x10 |
| #define NAND_CMD_READOOB 0x50 |
| #define NAND_CMD_ERASE1 0x60 |
| #define NAND_CMD_STATUS 0x70 |
| #define NAND_CMD_SEQIN 0x80 |
| #define NAND_CMD_RNDIN 0x85 |
| #define NAND_CMD_READID 0x90 |
| #define NAND_CMD_ERASE2 0xd0 |
| #define NAND_CMD_PARAM 0xec |
| #define NAND_CMD_GET_FEATURES 0xee |
| #define NAND_CMD_SET_FEATURES 0xef |
| #define NAND_CMD_RESET 0xff |
| |
| #define NAND_CMD_LOCK 0x2a |
| #define NAND_CMD_UNLOCK1 0x23 |
| #define NAND_CMD_UNLOCK2 0x24 |
| |
| /* Extended commands for large page devices */ |
| #define NAND_CMD_READSTART 0x30 |
| #define NAND_CMD_RNDOUTSTART 0xE0 |
| #define NAND_CMD_CACHEDPROG 0x15 |
| |
| #define NAND_CMD_NONE -1 |
| |
| /* Status bits */ |
| #define NAND_STATUS_FAIL 0x01 |
| #define NAND_STATUS_FAIL_N1 0x02 |
| #define NAND_STATUS_TRUE_READY 0x20 |
| #define NAND_STATUS_READY 0x40 |
| #define NAND_STATUS_WP 0x80 |
| |
| /* |
| * Constants for ECC_MODES |
| */ |
| typedef enum { |
| NAND_ECC_NONE, |
| NAND_ECC_SOFT, |
| NAND_ECC_HW, |
| NAND_ECC_HW_SYNDROME, |
| NAND_ECC_HW_OOB_FIRST, |
| NAND_ECC_SOFT_BCH, |
| } nand_ecc_modes_t; |
| |
| /* |
| * Constants for Hardware ECC |
| */ |
| /* Reset Hardware ECC for read */ |
| #define NAND_ECC_READ 0 |
| /* Reset Hardware ECC for write */ |
| #define NAND_ECC_WRITE 1 |
| /* Enable Hardware ECC before syndrome is read back from flash */ |
| #define NAND_ECC_READSYN 2 |
| |
| /* Bit mask for flags passed to do_nand_read_ecc */ |
| #define NAND_GET_DEVICE 0x80 |
| |
| |
| /* |
| * Option constants for bizarre disfunctionality and real |
| * features. |
| */ |
| /* Buswidth is 16 bit */ |
| #define NAND_BUSWIDTH_16 0x00000002 |
| /* Chip has cache program function */ |
| #define NAND_CACHEPRG 0x00000008 |
| /* |
| * Chip requires ready check on read (for auto-incremented sequential read). |
| * True only for small page devices; large page devices do not support |
| * autoincrement. |
| */ |
| #define NAND_NEED_READRDY 0x00000100 |
| |
| /* Chip does not allow subpage writes */ |
| #define NAND_NO_SUBPAGE_WRITE 0x00000200 |
| |
| /* Device is one of 'new' xD cards that expose fake nand command set */ |
| #define NAND_BROKEN_XD 0x00000400 |
| |
| /* Device behaves just like nand, but is readonly */ |
| #define NAND_ROM 0x00000800 |
| |
| /* Device supports subpage reads */ |
| #define NAND_SUBPAGE_READ 0x00001000 |
| |
| /* Options valid for Samsung large page devices */ |
| #define NAND_SAMSUNG_LP_OPTIONS NAND_CACHEPRG |
| |
| /* Macros to identify the above */ |
| #define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG)) |
| #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ)) |
| |
| /* Non chip related options */ |
| /* This option skips the bbt scan during initialization. */ |
| #define NAND_SKIP_BBTSCAN 0x00010000 |
| /* |
| * This option is defined if the board driver allocates its own buffers |
| * (e.g. because it needs them DMA-coherent). |
| */ |
| #define NAND_OWN_BUFFERS 0x00020000 |
| /* Chip may not exist, so silence any errors in scan */ |
| #define NAND_SCAN_SILENT_NODEV 0x00040000 |
| /* |
| * Autodetect nand buswidth with readid/onfi. |
| * This suppose the driver will configure the hardware in 8 bits mode |
| * when calling nand_scan_ident, and update its configuration |
| * before calling nand_scan_tail. |
| */ |
| #define NAND_BUSWIDTH_AUTO 0x00080000 |
| |
| /* Options set by nand scan */ |
| /* Nand scan has allocated controller struct */ |
| #define NAND_CONTROLLER_ALLOC 0x80000000 |
| |
| /* Cell info constants */ |
| #define NAND_CI_CHIPNR_MSK 0x03 |
| #define NAND_CI_CELLTYPE_MSK 0x0C |
| |
| /* Keep gcc happy */ |
| struct nand_chip; |
| |
| /* ONFI timing mode, used in both asynchronous and synchronous mode */ |
| #define ONFI_TIMING_MODE_0 (1 << 0) |
| #define ONFI_TIMING_MODE_1 (1 << 1) |
| #define ONFI_TIMING_MODE_2 (1 << 2) |
| #define ONFI_TIMING_MODE_3 (1 << 3) |
| #define ONFI_TIMING_MODE_4 (1 << 4) |
| #define ONFI_TIMING_MODE_5 (1 << 5) |
| #define ONFI_TIMING_MODE_UNKNOWN (1 << 6) |
| |
| /* ONFI feature address */ |
| #define ONFI_FEATURE_ADDR_TIMING_MODE 0x1 |
| |
| /* ONFI subfeature parameters length */ |
| #define ONFI_SUBFEATURE_PARAM_LEN 4 |
| |
| struct nand_onfi_params { |
| /* rev info and features block */ |
| /* 'O' 'N' 'F' 'I' */ |
| u8 sig[4]; |
| __le16 revision; |
| __le16 features; |
| __le16 opt_cmd; |
| u8 reserved[22]; |
| |
| /* manufacturer information block */ |
| char manufacturer[12]; |
| char model[20]; |
| u8 jedec_id; |
| __le16 date_code; |
| u8 reserved2[13]; |
| |
| /* memory organization block */ |
| __le32 byte_per_page; |
| __le16 spare_bytes_per_page; |
| __le32 data_bytes_per_ppage; |
| __le16 spare_bytes_per_ppage; |
| __le32 pages_per_block; |
| __le32 blocks_per_lun; |
| u8 lun_count; |
| u8 addr_cycles; |
| u8 bits_per_cell; |
| __le16 bb_per_lun; |
| __le16 block_endurance; |
| u8 guaranteed_good_blocks; |
| __le16 guaranteed_block_endurance; |
| u8 programs_per_page; |
| u8 ppage_attr; |
| u8 ecc_bits; |
| u8 interleaved_bits; |
| u8 interleaved_ops; |
| u8 reserved3[13]; |
| |
| /* electrical parameter block */ |
| u8 io_pin_capacitance_max; |
| __le16 async_timing_mode; |
| __le16 program_cache_timing_mode; |
| __le16 t_prog; |
| __le16 t_bers; |
| __le16 t_r; |
| __le16 t_ccs; |
| __le16 src_sync_timing_mode; |
| __le16 src_ssync_features; |
| __le16 clk_pin_capacitance_typ; |
| __le16 io_pin_capacitance_typ; |
| __le16 input_pin_capacitance_typ; |
| u8 input_pin_capacitance_max; |
| u8 driver_strenght_support; |
| __le16 t_int_r; |
| __le16 t_ald; |
| u8 reserved4[7]; |
| |
| /* vendor */ |
| u8 reserved5[90]; |
| |
| __le16 crc; |
| } __attribute__((packed)); |
| |
| #define ONFI_CRC_BASE 0x4F4E |
| |
| /** |
| * struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independent devices |
| * @lock: protection lock |
| * @active: the mtd device which holds the controller currently |
| * @wq: wait queue to sleep on if a NAND operation is in |
| * progress used instead of the per chip wait queue |
| * when a hw controller is available. |
| */ |
| struct nand_hw_control { |
| spinlock_t lock; |
| struct nand_chip *active; |
| wait_queue_head_t wq; |
| }; |
| |
| /** |
| * struct nand_ecc_ctrl - Control structure for ECC |
| * @mode: ECC mode |
| * @steps: number of ECC steps per page |
| * @size: data bytes per ECC step |
| * @bytes: ECC bytes per step |
| * @strength: max number of correctible bits per ECC step |
| * @total: total number of ECC bytes per page |
| * @prepad: padding information for syndrome based ECC generators |
| * @postpad: padding information for syndrome based ECC generators |
| * @layout: ECC layout control struct pointer |
| * @priv: pointer to private ECC control data |
| * @hwctl: function to control hardware ECC generator. Must only |
| * be provided if an hardware ECC is available |
| * @calculate: function for ECC calculation or readback from ECC hardware |
| * @correct: function for ECC correction, matching to ECC generator (sw/hw) |
| * @read_page_raw: function to read a raw page without ECC |
| * @write_page_raw: function to write a raw page without ECC |
| * @read_page: function to read a page according to the ECC generator |
| * requirements; returns maximum number of bitflips corrected in |
| * any single ECC step, 0 if bitflips uncorrectable, -EIO hw error |
| * @read_subpage: function to read parts of the page covered by ECC; |
| * returns same as read_page() |
| * @write_subpage: function to write parts of the page covered by ECC. |
| * @write_page: function to write a page according to the ECC generator |
| * requirements. |
| * @write_oob_raw: function to write chip OOB data without ECC |
| * @read_oob_raw: function to read chip OOB data without ECC |
| * @read_oob: function to read chip OOB data |
| * @write_oob: function to write chip OOB data |
| */ |
| struct nand_ecc_ctrl { |
| nand_ecc_modes_t mode; |
| int steps; |
| int size; |
| int bytes; |
| int total; |
| int strength; |
| int prepad; |
| int postpad; |
| struct nand_ecclayout *layout; |
| void *priv; |
| void (*hwctl)(struct mtd_info *mtd, int mode); |
| int (*calculate)(struct mtd_info *mtd, const uint8_t *dat, |
| uint8_t *ecc_code); |
| int (*correct)(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc, |
| uint8_t *calc_ecc); |
| int (*read_page_raw)(struct mtd_info *mtd, struct nand_chip *chip, |
| uint8_t *buf, int oob_required, int page); |
| int (*write_page_raw)(struct mtd_info *mtd, struct nand_chip *chip, |
| const uint8_t *buf, int oob_required); |
| int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip, |
| uint8_t *buf, int oob_required, int page); |
| int (*read_subpage)(struct mtd_info *mtd, struct nand_chip *chip, |
| uint32_t offs, uint32_t len, uint8_t *buf); |
| int (*write_subpage)(struct mtd_info *mtd, struct nand_chip *chip, |
| uint32_t offset, uint32_t data_len, |
| const uint8_t *data_buf, int oob_required); |
| int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, |
| const uint8_t *buf, int oob_required); |
| int (*write_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip, |
| int page); |
| int (*read_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip, |
| int page); |
| int (*read_oob)(struct mtd_info *mtd, struct nand_chip *chip, int page); |
| int (*write_oob)(struct mtd_info *mtd, struct nand_chip *chip, |
| int page); |
| }; |
| |
| /** |
| * struct nand_buffers - buffer structure for read/write |
| * @ecccalc: buffer for calculated ECC |
| * @ecccode: buffer for ECC read from flash |
| * @databuf: buffer for data - dynamically sized |
| * |
| * Do not change the order of buffers. databuf and oobrbuf must be in |
| * consecutive order. |
| */ |
| struct nand_buffers { |
| uint8_t ecccalc[NAND_MAX_OOBSIZE]; |
| uint8_t ecccode[NAND_MAX_OOBSIZE]; |
| uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE]; |
| }; |
| |
| /** |
| * struct nand_chip - NAND Private Flash Chip Data |
| * @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the |
| * flash device |
| * @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the |
| * flash device. |
| * @read_byte: [REPLACEABLE] read one byte from the chip |
| * @read_word: [REPLACEABLE] read one word from the chip |
| * @write_buf: [REPLACEABLE] write data from the buffer to the chip |
| * @read_buf: [REPLACEABLE] read data from the chip into the buffer |
| * @select_chip: [REPLACEABLE] select chip nr |
| * @block_bad: [REPLACEABLE] check, if the block is bad |
| * @block_markbad: [REPLACEABLE] mark the block bad |
| * @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific function for controlling |
| * ALE/CLE/nCE. Also used to write command and address |
| * @init_size: [BOARDSPECIFIC] hardwarespecific function for setting |
| * mtd->oobsize, mtd->writesize and so on. |
| * @id_data contains the 8 bytes values of NAND_CMD_READID. |
| * Return with the bus width. |
| * @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accessing |
| * device ready/busy line. If set to NULL no access to |
| * ready/busy is available and the ready/busy information |
| * is read from the chip status register. |
| * @cmdfunc: [REPLACEABLE] hardwarespecific function for writing |
| * commands to the chip. |
| * @waitfunc: [REPLACEABLE] hardwarespecific function for wait on |
| * ready. |
| * @ecc: [BOARDSPECIFIC] ECC control structure |
| * @buffers: buffer structure for read/write |
| * @hwcontrol: platform-specific hardware control structure |
| * @erase_cmd: [INTERN] erase command write function, selectable due |
| * to AND support. |
| * @scan_bbt: [REPLACEABLE] function to scan bad block table |
| * @chip_delay: [BOARDSPECIFIC] chip dependent delay for transferring |
| * data from array to read regs (tR). |
| * @state: [INTERN] the current state of the NAND device |
| * @oob_poi: "poison value buffer," used for laying out OOB data |
| * before writing |
| * @page_shift: [INTERN] number of address bits in a page (column |
| * address bits). |
| * @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock |
| * @bbt_erase_shift: [INTERN] number of address bits in a bbt entry |
| * @chip_shift: [INTERN] number of address bits in one chip |
| * @options: [BOARDSPECIFIC] various chip options. They can partly |
| * be set to inform nand_scan about special functionality. |
| * See the defines for further explanation. |
| * @bbt_options: [INTERN] bad block specific options. All options used |
| * here must come from bbm.h. By default, these options |
| * will be copied to the appropriate nand_bbt_descr's. |
| * @badblockpos: [INTERN] position of the bad block marker in the oob |
| * area. |
| * @badblockbits: [INTERN] minimum number of set bits in a good block's |
| * bad block marker position; i.e., BBM == 11110111b is |
| * not bad when badblockbits == 7 |
| * @cellinfo: [INTERN] MLC/multichip data from chip ident |
| * @numchips: [INTERN] number of physical chips |
| * @chipsize: [INTERN] the size of one chip for multichip arrays |
| * @pagemask: [INTERN] page number mask = number of (pages / chip) - 1 |
| * @pagebuf: [INTERN] holds the pagenumber which is currently in |
| * data_buf. |
| * @pagebuf_bitflips: [INTERN] holds the bitflip count for the page which is |
| * currently in data_buf. |
| * @subpagesize: [INTERN] holds the subpagesize |
| * @onfi_version: [INTERN] holds the chip ONFI version (BCD encoded), |
| * non 0 if ONFI supported. |
| * @onfi_params: [INTERN] holds the ONFI page parameter when ONFI is |
| * supported, 0 otherwise. |
| * @onfi_set_features: [REPLACEABLE] set the features for ONFI nand |
| * @onfi_get_features: [REPLACEABLE] get the features for ONFI nand |
| * @ecclayout: [REPLACEABLE] the default ECC placement scheme |
| * @bbt: [INTERN] bad block table pointer |
| * @bbt_td: [REPLACEABLE] bad block table descriptor for flash |
| * lookup. |
| * @bbt_md: [REPLACEABLE] bad block table mirror descriptor |
| * @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial |
| * bad block scan. |
| * @controller: [REPLACEABLE] a pointer to a hardware controller |
| * structure which is shared among multiple independent |
| * devices. |
| * @priv: [OPTIONAL] pointer to private chip data |
| * @errstat: [OPTIONAL] hardware specific function to perform |
| * additional error status checks (determine if errors are |
| * correctable). |
| * @write_page: [REPLACEABLE] High-level page write function |
| */ |
| |
| struct nand_chip { |
| void __iomem *IO_ADDR_R; |
| void __iomem *IO_ADDR_W; |
| |
| uint8_t (*read_byte)(struct mtd_info *mtd); |
| u16 (*read_word)(struct mtd_info *mtd); |
| void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); |
| void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len); |
| void (*select_chip)(struct mtd_info *mtd, int chip); |
| int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip); |
| int (*block_markbad)(struct mtd_info *mtd, loff_t ofs); |
| void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl); |
| int (*init_size)(struct mtd_info *mtd, struct nand_chip *this, |
| u8 *id_data); |
| int (*dev_ready)(struct mtd_info *mtd); |
| void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, |
| int page_addr); |
| int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this); |
| void (*erase_cmd)(struct mtd_info *mtd, int page); |
| int (*scan_bbt)(struct mtd_info *mtd); |
| int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, |
| int status, int page); |
| int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, |
| uint32_t offset, int data_len, const uint8_t *buf, |
| int oob_required, int page, int cached, int raw); |
| int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip, |
| int feature_addr, uint8_t *subfeature_para); |
| int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip, |
| int feature_addr, uint8_t *subfeature_para); |
| |
| int chip_delay; |
| unsigned int options; |
| unsigned int bbt_options; |
| |
| int page_shift; |
| int phys_erase_shift; |
| int bbt_erase_shift; |
| int chip_shift; |
| int numchips; |
| uint64_t chipsize; |
| int pagemask; |
| int pagebuf; |
| unsigned int pagebuf_bitflips; |
| int subpagesize; |
| uint8_t cellinfo; |
| int badblockpos; |
| int badblockbits; |
| |
| int onfi_version; |
| struct nand_onfi_params onfi_params; |
| |
| flstate_t state; |
| |
| uint8_t *oob_poi; |
| struct nand_hw_control *controller; |
| struct nand_ecclayout *ecclayout; |
| |
| struct nand_ecc_ctrl ecc; |
| struct nand_buffers *buffers; |
| struct nand_hw_control hwcontrol; |
| |
| uint8_t *bbt; |
| struct nand_bbt_descr *bbt_td; |
| struct nand_bbt_descr *bbt_md; |
| |
| struct nand_bbt_descr *badblock_pattern; |
| |
| void *priv; |
| }; |
| |
| /* |
| * NAND Flash Manufacturer ID Codes |
| */ |
| #define NAND_MFR_TOSHIBA 0x98 |
| #define NAND_MFR_SAMSUNG 0xec |
| #define NAND_MFR_FUJITSU 0x04 |
| #define NAND_MFR_NATIONAL 0x8f |
| #define NAND_MFR_RENESAS 0x07 |
| #define NAND_MFR_STMICRO 0x20 |
| #define NAND_MFR_HYNIX 0xad |
| #define NAND_MFR_MICRON 0x2c |
| #define NAND_MFR_AMD 0x01 |
| #define NAND_MFR_MACRONIX 0xc2 |
| #define NAND_MFR_EON 0x92 |
| |
| /* The maximum expected count of bytes in the NAND ID sequence */ |
| #define NAND_MAX_ID_LEN 8 |
| |
| /* |
| * A helper for defining older NAND chips where the second ID byte fully |
| * defined the chip, including the geometry (chip size, eraseblock size, page |
| * size). All these chips have 512 bytes NAND page size. |
| */ |
| #define LEGACY_ID_NAND(nm, devid, chipsz, erasesz, opts) \ |
| { .name = (nm), {{ .dev_id = (devid) }}, .pagesize = 512, \ |
| .chipsize = (chipsz), .erasesize = (erasesz), .options = (opts) } |
| |
| /* |
| * A helper for defining newer chips which report their page size and |
| * eraseblock size via the extended ID bytes. |
| * |
| * The real difference between LEGACY_ID_NAND and EXTENDED_ID_NAND is that with |
| * EXTENDED_ID_NAND, manufacturers overloaded the same device ID so that the |
| * device ID now only represented a particular total chip size (and voltage, |
| * buswidth), and the page size, eraseblock size, and OOB size could vary while |
| * using the same device ID. |
| */ |
| #define EXTENDED_ID_NAND(nm, devid, chipsz, opts) \ |
| { .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \ |
| .options = (opts) } |
| |
| /** |
| * struct nand_flash_dev - NAND Flash Device ID Structure |
| * @name: a human-readable name of the NAND chip |
| * @dev_id: the device ID (the second byte of the full chip ID array) |
| * @mfr_id: manufecturer ID part of the full chip ID array (refers the same |
| * memory address as @id[0]) |
| * @dev_id: device ID part of the full chip ID array (refers the same memory |
| * address as @id[1]) |
| * @id: full device ID array |
| * @pagesize: size of the NAND page in bytes; if 0, then the real page size (as |
| * well as the eraseblock size) is determined from the extended NAND |
| * chip ID array) |
| * @chipsize: total chip size in MiB |
| * @erasesize: eraseblock size in bytes (determined from the extended ID if 0) |
| * @options: stores various chip bit options |
| * @id_len: The valid length of the @id. |
| * @oobsize: OOB size |
| */ |
| struct nand_flash_dev { |
| char *name; |
| union { |
| struct { |
| uint8_t mfr_id; |
| uint8_t dev_id; |
| }; |
| uint8_t id[NAND_MAX_ID_LEN]; |
| }; |
| unsigned int pagesize; |
| unsigned int chipsize; |
| unsigned int erasesize; |
| unsigned int options; |
| uint16_t id_len; |
| uint16_t oobsize; |
| }; |
| |
| /** |
| * struct nand_manufacturers - NAND Flash Manufacturer ID Structure |
| * @name: Manufacturer name |
| * @id: manufacturer ID code of device. |
| */ |
| struct nand_manufacturers { |
| int id; |
| char *name; |
| }; |
| |
| extern struct nand_flash_dev nand_flash_ids[]; |
| extern struct nand_manufacturers nand_manuf_ids[]; |
| |
| extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd); |
| extern int nand_update_bbt(struct mtd_info *mtd, loff_t offs); |
| extern int nand_default_bbt(struct mtd_info *mtd); |
| extern int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt); |
| extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, |
| int allowbbt); |
| extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len, |
| size_t *retlen, uint8_t *buf); |
| |
| /** |
| * struct platform_nand_chip - chip level device structure |
| * @nr_chips: max. number of chips to scan for |
| * @chip_offset: chip number offset |
| * @nr_partitions: number of partitions pointed to by partitions (or zero) |
| * @partitions: mtd partition list |
| * @chip_delay: R/B delay value in us |
| * @options: Option flags, e.g. 16bit buswidth |
| * @bbt_options: BBT option flags, e.g. NAND_BBT_USE_FLASH |
| * @ecclayout: ECC layout info structure |
| * @part_probe_types: NULL-terminated array of probe types |
| */ |
| struct platform_nand_chip { |
| int nr_chips; |
| int chip_offset; |
| int nr_partitions; |
| struct mtd_partition *partitions; |
| struct nand_ecclayout *ecclayout; |
| int chip_delay; |
| unsigned int options; |
| unsigned int bbt_options; |
| const char **part_probe_types; |
| }; |
| |
| /* Keep gcc happy */ |
| struct platform_device; |
| |
| /** |
| * struct platform_nand_ctrl - controller level device structure |
| * @probe: platform specific function to probe/setup hardware |
| * @remove: platform specific function to remove/teardown hardware |
| * @hwcontrol: platform specific hardware control structure |
| * @dev_ready: platform specific function to read ready/busy pin |
| * @select_chip: platform specific chip select function |
| * @cmd_ctrl: platform specific function for controlling |
| * ALE/CLE/nCE. Also used to write command and address |
| * @write_buf: platform specific function for write buffer |
| * @read_buf: platform specific function for read buffer |
| * @read_byte: platform specific function to read one byte from chip |
| * @priv: private data to transport driver specific settings |
| * |
| * All fields are optional and depend on the hardware driver requirements |
| */ |
| struct platform_nand_ctrl { |
| int (*probe)(struct platform_device *pdev); |
| void (*remove)(struct platform_device *pdev); |
| void (*hwcontrol)(struct mtd_info *mtd, int cmd); |
| int (*dev_ready)(struct mtd_info *mtd); |
| void (*select_chip)(struct mtd_info *mtd, int chip); |
| void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl); |
| void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len); |
| void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len); |
| unsigned char (*read_byte)(struct mtd_info *mtd); |
| void *priv; |
| }; |
| |
| /** |
| * struct platform_nand_data - container structure for platform-specific data |
| * @chip: chip level chip structure |
| * @ctrl: controller level device structure |
| */ |
| struct platform_nand_data { |
| struct platform_nand_chip chip; |
| struct platform_nand_ctrl ctrl; |
| }; |
| |
| /* Some helpers to access the data structures */ |
| static inline |
| struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd) |
| { |
| struct nand_chip *chip = mtd->priv; |
| |
| return chip->priv; |
| } |
| |
| /* return the supported asynchronous timing mode. */ |
| static inline int onfi_get_async_timing_mode(struct nand_chip *chip) |
| { |
| if (!chip->onfi_version) |
| return ONFI_TIMING_MODE_UNKNOWN; |
| return le16_to_cpu(chip->onfi_params.async_timing_mode); |
| } |
| |
| /* return the supported synchronous timing mode. */ |
| static inline int onfi_get_sync_timing_mode(struct nand_chip *chip) |
| { |
| if (!chip->onfi_version) |
| return ONFI_TIMING_MODE_UNKNOWN; |
| return le16_to_cpu(chip->onfi_params.src_sync_timing_mode); |
| } |
| |
| #endif /* __LINUX_MTD_NAND_H */ |