include/linux/mtd/spinand.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2016-2017 Micron Technology, Inc.
   4  *
   5  *  Authors:
   6  *      Peter Pan <peterpandong@micron.com>
   7  */
   8 #ifndef __LINUX_MTD_SPINAND_H
   9 #define __LINUX_MTD_SPINAND_H
  10
  11 #include <linux/mutex.h>
  12 #include <linux/bitops.h>
  13 #include <linux/device.h>
  14 #include <linux/mtd/mtd.h>
  15 #include <linux/mtd/nand.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/spi/spi-mem.h>
  18
  19 /**
  20  * Standard SPI NAND flash operations
  21  */
  22
  23 #define SPINAND_RESET_OP                                                \
  24         SPI_MEM_OP(SPI_MEM_OP_CMD(0xff, 1),                             \
  25                    SPI_MEM_OP_NO_ADDR,                                  \
  26                    SPI_MEM_OP_NO_DUMMY,                                 \
  27                    SPI_MEM_OP_NO_DATA)
  28
  29 #define SPINAND_WR_EN_DIS_OP(enable)                                    \
  30         SPI_MEM_OP(SPI_MEM_OP_CMD((enable) ? 0x06 : 0x04, 1),           \
  31                    SPI_MEM_OP_NO_ADDR,                                  \
  32                    SPI_MEM_OP_NO_DUMMY,                                 \
  33                    SPI_MEM_OP_NO_DATA)
  34
  35 #define SPINAND_READID_OP(naddr, ndummy, buf, len)                      \
  36         SPI_MEM_OP(SPI_MEM_OP_CMD(0x9f, 1),                             \
  37                    SPI_MEM_OP_ADDR(naddr, 0, 1),                        \
  38                    SPI_MEM_OP_DUMMY(ndummy, 1),                         \
  39                    SPI_MEM_OP_DATA_IN(len, buf, 1))
  40
  41 #define SPINAND_SET_FEATURE_OP(reg, valptr)                             \
  42         SPI_MEM_OP(SPI_MEM_OP_CMD(0x1f, 1),                             \
  43                    SPI_MEM_OP_ADDR(1, reg, 1),                          \
  44                    SPI_MEM_OP_NO_DUMMY,                                 \
  45                    SPI_MEM_OP_DATA_OUT(1, valptr, 1))
  46
  47 #define SPINAND_GET_FEATURE_OP(reg, valptr)                             \
  48         SPI_MEM_OP(SPI_MEM_OP_CMD(0x0f, 1),                             \
  49                    SPI_MEM_OP_ADDR(1, reg, 1),                          \
  50                    SPI_MEM_OP_NO_DUMMY,                                 \
  51                    SPI_MEM_OP_DATA_IN(1, valptr, 1))
  52
  53 #define SPINAND_BLK_ERASE_OP(addr)                                      \
  54         SPI_MEM_OP(SPI_MEM_OP_CMD(0xd8, 1),                             \
  55                    SPI_MEM_OP_ADDR(3, addr, 1),                         \
  56                    SPI_MEM_OP_NO_DUMMY,                                 \
  57                    SPI_MEM_OP_NO_DATA)
  58
  59 #define SPINAND_PAGE_READ_OP(addr)                                      \
  60         SPI_MEM_OP(SPI_MEM_OP_CMD(0x13, 1),                             \
  61                    SPI_MEM_OP_ADDR(3, addr, 1),                         \
  62                    SPI_MEM_OP_NO_DUMMY,                                 \
  63                    SPI_MEM_OP_NO_DATA)
  64
  65 #define SPINAND_PAGE_READ_FROM_CACHE_OP(fast, addr, ndummy, buf, len)   \
  66         SPI_MEM_OP(SPI_MEM_OP_CMD(fast ? 0x0b : 0x03, 1),               \
  67                    SPI_MEM_OP_ADDR(2, addr, 1),                         \
  68                    SPI_MEM_OP_DUMMY(ndummy, 1),                         \
  69                    SPI_MEM_OP_DATA_IN(len, buf, 1))
  70
  71 #define SPINAND_PAGE_READ_FROM_CACHE_OP_3A(fast, addr, ndummy, buf, len) \
  72         SPI_MEM_OP(SPI_MEM_OP_CMD(fast ? 0x0b : 0x03, 1),               \
  73                    SPI_MEM_OP_ADDR(3, addr, 1),                         \
  74                    SPI_MEM_OP_DUMMY(ndummy, 1),                         \
  75                    SPI_MEM_OP_DATA_IN(len, buf, 1))
  76
  77 #define SPINAND_PAGE_READ_FROM_CACHE_X2_OP(addr, ndummy, buf, len)      \
  78         SPI_MEM_OP(SPI_MEM_OP_CMD(0x3b, 1),                             \
  79                    SPI_MEM_OP_ADDR(2, addr, 1),                         \
  80                    SPI_MEM_OP_DUMMY(ndummy, 1),                         \
  81                    SPI_MEM_OP_DATA_IN(len, buf, 2))
  82
  83 #define SPINAND_PAGE_READ_FROM_CACHE_X2_OP_3A(addr, ndummy, buf, len)   \
  84         SPI_MEM_OP(SPI_MEM_OP_CMD(0x3b, 1),                             \
  85                    SPI_MEM_OP_ADDR(3, addr, 1),                         \
  86                    SPI_MEM_OP_DUMMY(ndummy, 1),                         \
  87                    SPI_MEM_OP_DATA_IN(len, buf, 2))
  88
  89 #define SPINAND_PAGE_READ_FROM_CACHE_X4_OP(addr, ndummy, buf, len)      \
  90         SPI_MEM_OP(SPI_MEM_OP_CMD(0x6b, 1),                             \
  91                    SPI_MEM_OP_ADDR(2, addr, 1),                         \
  92                    SPI_MEM_OP_DUMMY(ndummy, 1),                         \
  93                    SPI_MEM_OP_DATA_IN(len, buf, 4))
  94
  95 #define SPINAND_PAGE_READ_FROM_CACHE_X4_OP_3A(addr, ndummy, buf, len)   \
  96         SPI_MEM_OP(SPI_MEM_OP_CMD(0x6b, 1),                             \
  97                    SPI_MEM_OP_ADDR(3, addr, 1),                         \
  98                    SPI_MEM_OP_DUMMY(ndummy, 1),                         \
  99                    SPI_MEM_OP_DATA_IN(len, buf, 4))
 100
 101 #define SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(addr, ndummy, buf, len)  \
 102         SPI_MEM_OP(SPI_MEM_OP_CMD(0xbb, 1),                             \
 103                    SPI_MEM_OP_ADDR(2, addr, 2),                         \
 104                    SPI_MEM_OP_DUMMY(ndummy, 2),                         \
 105                    SPI_MEM_OP_DATA_IN(len, buf, 2))
 106
 107 #define SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP_3A(addr, ndummy, buf, len) \
 108         SPI_MEM_OP(SPI_MEM_OP_CMD(0xbb, 1),                             \
 109                    SPI_MEM_OP_ADDR(3, addr, 2),                         \
 110                    SPI_MEM_OP_DUMMY(ndummy, 2),                         \
 111                    SPI_MEM_OP_DATA_IN(len, buf, 2))
 112
 113 #define SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(addr, ndummy, buf, len)  \
 114         SPI_MEM_OP(SPI_MEM_OP_CMD(0xeb, 1),                             \
 115                    SPI_MEM_OP_ADDR(2, addr, 4),                         \
 116                    SPI_MEM_OP_DUMMY(ndummy, 4),                         \
 117                    SPI_MEM_OP_DATA_IN(len, buf, 4))
 118
 119 #define SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP_3A(addr, ndummy, buf, len) \
 120         SPI_MEM_OP(SPI_MEM_OP_CMD(0xeb, 1),                             \
 121                    SPI_MEM_OP_ADDR(3, addr, 4),                         \
 122                    SPI_MEM_OP_DUMMY(ndummy, 4),                         \
 123                    SPI_MEM_OP_DATA_IN(len, buf, 4))
 124
 125 #define SPINAND_PROG_EXEC_OP(addr)                                      \
 126         SPI_MEM_OP(SPI_MEM_OP_CMD(0x10, 1),                             \
 127                    SPI_MEM_OP_ADDR(3, addr, 1),                         \
 128                    SPI_MEM_OP_NO_DUMMY,                                 \
 129                    SPI_MEM_OP_NO_DATA)
 130
 131 #define SPINAND_PROG_LOAD(reset, addr, buf, len)                        \
 132         SPI_MEM_OP(SPI_MEM_OP_CMD(reset ? 0x02 : 0x84, 1),              \
 133                    SPI_MEM_OP_ADDR(2, addr, 1),                         \
 134                    SPI_MEM_OP_NO_DUMMY,                                 \
 135                    SPI_MEM_OP_DATA_OUT(len, buf, 1))
 136
 137 #define SPINAND_PROG_LOAD_X4(reset, addr, buf, len)                     \
 138         SPI_MEM_OP(SPI_MEM_OP_CMD(reset ? 0x32 : 0x34, 1),              \
 139                    SPI_MEM_OP_ADDR(2, addr, 1),                         \
 140                    SPI_MEM_OP_NO_DUMMY,                                 \
 141                    SPI_MEM_OP_DATA_OUT(len, buf, 4))
 142
 143 /**
 144  * Standard SPI NAND flash commands
 145  */
 146 #define SPINAND_CMD_PROG_LOAD_X4                0x32
 147 #define SPINAND_CMD_PROG_LOAD_RDM_DATA_X4       0x34
 148
 149 /* feature register */
 150 #define REG_BLOCK_LOCK          0xa0
 151 #define BL_ALL_UNLOCKED         0x00
 152
 153 /* configuration register */
 154 #define REG_CFG                 0xb0
 155 #define CFG_OTP_ENABLE          BIT(6)
 156 #define CFG_ECC_ENABLE          BIT(4)
 157 #define CFG_QUAD_ENABLE         BIT(0)
 158
 159 /* status register */
 160 #define REG_STATUS              0xc0
 161 #define STATUS_BUSY             BIT(0)
 162 #define STATUS_ERASE_FAILED     BIT(2)
 163 #define STATUS_PROG_FAILED      BIT(3)
 164 #define STATUS_ECC_MASK         GENMASK(5, 4)
 165 #define STATUS_ECC_NO_BITFLIPS  (0 << 4)
 166 #define STATUS_ECC_HAS_BITFLIPS (1 << 4)
 167 #define STATUS_ECC_UNCOR_ERROR  (2 << 4)
 168
 169 struct spinand_op;
 170 struct spinand_device;
 171
 172 #define SPINAND_MAX_ID_LEN      4
 173 /*
 174  * For erase, write and read operation, we got the following timings :
 175  * tBERS (erase) 1ms to 4ms
 176  * tPROG 300us to 400us
 177  * tREAD 25us to 100us
 178  * In order to minimize latency, the min value is divided by 4 for the
 179  * initial delay, and dividing by 20 for the poll delay.
 180  * For reset, 5us/10us/500us if the device is respectively
 181  * reading/programming/erasing when the RESET occurs. Since we always
 182  * issue a RESET when the device is IDLE, 5us is selected for both initial
 183  * and poll delay.
 184  */
 185 #define SPINAND_READ_INITIAL_DELAY_US   6
 186 #define SPINAND_READ_POLL_DELAY_US      5
 187 #define SPINAND_RESET_INITIAL_DELAY_US  5
 188 #define SPINAND_RESET_POLL_DELAY_US     5
 189 #define SPINAND_WRITE_INITIAL_DELAY_US  75
 190 #define SPINAND_WRITE_POLL_DELAY_US     15
 191 #define SPINAND_ERASE_INITIAL_DELAY_US  250
 192 #define SPINAND_ERASE_POLL_DELAY_US     50
 193
 194 #define SPINAND_WAITRDY_TIMEOUT_MS      400
 195
 196 /**
 197  * struct spinand_id - SPI NAND id structure
 198  * @data: buffer containing the id bytes. Currently 4 bytes large, but can
 199  *        be extended if required
 200  * @len: ID length
 201  */
 202 struct spinand_id {
 203         u8 data[SPINAND_MAX_ID_LEN];
 204         int len;
 205 };
 206
 207 enum spinand_readid_method {
 208         SPINAND_READID_METHOD_OPCODE,
 209         SPINAND_READID_METHOD_OPCODE_ADDR,
 210         SPINAND_READID_METHOD_OPCODE_DUMMY,
 211 };
 212
 213 /**
 214  * struct spinand_devid - SPI NAND device id structure
 215  * @id: device id of current chip
 216  * @len: number of bytes in device id
 217  * @method: method to read chip id
 218  *          There are 3 possible variants:
 219  *          SPINAND_READID_METHOD_OPCODE: chip id is returned immediately
 220  *          after read_id opcode.
 221  *          SPINAND_READID_METHOD_OPCODE_ADDR: chip id is returned after
 222  *          read_id opcode + 1-byte address.
 223  *          SPINAND_READID_METHOD_OPCODE_DUMMY: chip id is returned after
 224  *          read_id opcode + 1 dummy byte.
 225  */
 226 struct spinand_devid {
 227         const u8 *id;
 228         const u8 len;
 229         const enum spinand_readid_method method;
 230 };
 231
 232 /**
 233  * struct manufacurer_ops - SPI NAND manufacturer specific operations
 234  * @init: initialize a SPI NAND device
 235  * @cleanup: cleanup a SPI NAND device
 236  *
 237  * Each SPI NAND manufacturer driver should implement this interface so that
 238  * NAND chips coming from this vendor can be initialized properly.
 239  */
 240 struct spinand_manufacturer_ops {
 241         int (*init)(struct spinand_device *spinand);
 242         void (*cleanup)(struct spinand_device *spinand);
 243 };
 244
 245 /**
 246  * struct spinand_manufacturer - SPI NAND manufacturer instance
 247  * @id: manufacturer ID
 248  * @name: manufacturer name
 249  * @devid_len: number of bytes in device ID
 250  * @chips: supported SPI NANDs under current manufacturer
 251  * @nchips: number of SPI NANDs available in chips array
 252  * @ops: manufacturer operations
 253  */
 254 struct spinand_manufacturer {
 255         u8 id;
 256         char *name;
 257         const struct spinand_info *chips;
 258         const size_t nchips;
 259         const struct spinand_manufacturer_ops *ops;
 260 };
 261
 262 /* SPI NAND manufacturers */
 263 extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
 264 extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 265 extern const struct spinand_manufacturer micron_spinand_manufacturer;
 266 extern const struct spinand_manufacturer paragon_spinand_manufacturer;
 267 extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
 268 extern const struct spinand_manufacturer winbond_spinand_manufacturer;
 269 extern const struct spinand_manufacturer xtx_spinand_manufacturer;
 270
 271 /**
 272  * struct spinand_op_variants - SPI NAND operation variants
 273  * @ops: the list of variants for a given operation
 274  * @nops: the number of variants
 275  *
 276  * Some operations like read-from-cache/write-to-cache have several variants
 277  * depending on the number of IO lines you use to transfer data or address
 278  * cycles. This structure is a way to describe the different variants supported
 279  * by a chip and let the core pick the best one based on the SPI mem controller
 280  * capabilities.
 281  */
 282 struct spinand_op_variants {
 283         const struct spi_mem_op *ops;
 284         unsigned int nops;
 285 };
 286
 287 #define SPINAND_OP_VARIANTS(name, ...)                                  \
 288         const struct spinand_op_variants name = {                       \
 289                 .ops = (struct spi_mem_op[]) { __VA_ARGS__ },           \
 290                 .nops = sizeof((struct spi_mem_op[]){ __VA_ARGS__ }) /  \
 291                         sizeof(struct spi_mem_op),                      \
 292         }
 293
 294 /**
 295  * spinand_ecc_info - description of the on-die ECC implemented by a SPI NAND
 296  *                    chip
 297  * @get_status: get the ECC status. Should return a positive number encoding
 298  *              the number of corrected bitflips if correction was possible or
 299  *              -EBADMSG if there are uncorrectable errors. I can also return
 300  *              other negative error codes if the error is not caused by
 301  *              uncorrectable bitflips
 302  * @ooblayout: the OOB layout used by the on-die ECC implementation
 303  */
 304 struct spinand_ecc_info {
 305         int (*get_status)(struct spinand_device *spinand, u8 status);
 306         const struct mtd_ooblayout_ops *ooblayout;
 307 };
 308
 309 #define SPINAND_HAS_QE_BIT              BIT(0)
 310 #define SPINAND_HAS_CR_FEAT_BIT         BIT(1)
 311
 312 /**
 313  * struct spinand_ondie_ecc_conf - private SPI-NAND on-die ECC engine structure
 314  * @status: status of the last wait operation that will be used in case
 315  *          ->get_status() is not populated by the spinand device.
 316  */
 317 struct spinand_ondie_ecc_conf {
 318         u8 status;
 319 };
 320
 321 /**
 322  * struct spinand_info - Structure used to describe SPI NAND chips
 323  * @model: model name
 324  * @devid: device ID
 325  * @flags: OR-ing of the SPINAND_XXX flags
 326  * @memorg: memory organization
 327  * @eccreq: ECC requirements
 328  * @eccinfo: on-die ECC info
 329  * @op_variants: operations variants
 330  * @op_variants.read_cache: variants of the read-cache operation
 331  * @op_variants.write_cache: variants of the write-cache operation
 332  * @op_variants.update_cache: variants of the update-cache operation
 333  * @select_target: function used to select a target/die. Required only for
 334  *                 multi-die chips
 335  *
 336  * Each SPI NAND manufacturer driver should have a spinand_info table
 337  * describing all the chips supported by the driver.
 338  */
 339 struct spinand_info {
 340         const char *model;
 341         struct spinand_devid devid;
 342         u32 flags;
 343         struct nand_memory_organization memorg;
 344         struct nand_ecc_props eccreq;
 345         struct spinand_ecc_info eccinfo;
 346         struct {
 347                 const struct spinand_op_variants *read_cache;
 348                 const struct spinand_op_variants *write_cache;
 349                 const struct spinand_op_variants *update_cache;
 350         } op_variants;
 351         int (*select_target)(struct spinand_device *spinand,
 352                              unsigned int target);
 353 };
 354
 355 #define SPINAND_ID(__method, ...)                                       \
 356         {                                                               \
 357                 .id = (const u8[]){ __VA_ARGS__ },                      \
 358                 .len = sizeof((u8[]){ __VA_ARGS__ }),                   \
 359                 .method = __method,                                     \
 360         }
 361
 362 #define SPINAND_INFO_OP_VARIANTS(__read, __write, __update)             \
 363         {                                                               \
 364                 .read_cache = __read,                                   \
 365                 .write_cache = __write,                                 \
 366                 .update_cache = __update,                               \
 367         }
 368
 369 #define SPINAND_ECCINFO(__ooblayout, __get_status)                      \
 370         .eccinfo = {                                                    \
 371                 .ooblayout = __ooblayout,                               \
 372                 .get_status = __get_status,                             \
 373         }
 374
 375 #define SPINAND_SELECT_TARGET(__func)                                   \
 376         .select_target = __func,
 377
 378 #define SPINAND_INFO(__model, __id, __memorg, __eccreq, __op_variants,  \
 379                      __flags, ...)                                      \
 380         {                                                               \
 381                 .model = __model,                                       \
 382                 .devid = __id,                                          \
 383                 .memorg = __memorg,                                     \
 384                 .eccreq = __eccreq,                                     \
 385                 .op_variants = __op_variants,                           \
 386                 .flags = __flags,                                       \
 387                 __VA_ARGS__                                             \
 388         }
 389
 390 struct spinand_dirmap {
 391         struct spi_mem_dirmap_desc *wdesc;
 392         struct spi_mem_dirmap_desc *rdesc;
 393         struct spi_mem_dirmap_desc *wdesc_ecc;
 394         struct spi_mem_dirmap_desc *rdesc_ecc;
 395 };
 396
 397 /**
 398  * struct spinand_device - SPI NAND device instance
 399  * @base: NAND device instance
 400  * @spimem: pointer to the SPI mem object
 401  * @lock: lock used to serialize accesses to the NAND
 402  * @id: NAND ID as returned by READ_ID
 403  * @flags: NAND flags
 404  * @op_templates: various SPI mem op templates
 405  * @op_templates.read_cache: read cache op template
 406  * @op_templates.write_cache: write cache op template
 407  * @op_templates.update_cache: update cache op template
 408  * @select_target: select a specific target/die. Usually called before sending
 409  *                 a command addressing a page or an eraseblock embedded in
 410  *                 this die. Only required if your chip exposes several dies
 411  * @cur_target: currently selected target/die
 412  * @eccinfo: on-die ECC information
 413  * @cfg_cache: config register cache. One entry per die
 414  * @databuf: bounce buffer for data
 415  * @oobbuf: bounce buffer for OOB data
 416  * @scratchbuf: buffer used for everything but page accesses. This is needed
 417  *              because the spi-mem interface explicitly requests that buffers
 418  *              passed in spi_mem_op be DMA-able, so we can't based the bufs on
 419  *              the stack
 420  * @manufacturer: SPI NAND manufacturer information
 421  * @priv: manufacturer private data
 422  */
 423 struct spinand_device {
 424         struct nand_device base;
 425         struct spi_mem *spimem;
 426         struct mutex lock;
 427         struct spinand_id id;
 428         u32 flags;
 429
 430         struct {
 431                 const struct spi_mem_op *read_cache;
 432                 const struct spi_mem_op *write_cache;
 433                 const struct spi_mem_op *update_cache;
 434         } op_templates;
 435
 436         struct spinand_dirmap *dirmaps;
 437
 438         int (*select_target)(struct spinand_device *spinand,
 439                              unsigned int target);
 440         unsigned int cur_target;
 441
 442         struct spinand_ecc_info eccinfo;
 443
 444         u8 *cfg_cache;
 445         u8 *databuf;
 446         u8 *oobbuf;
 447         u8 *scratchbuf;
 448         const struct spinand_manufacturer *manufacturer;
 449         void *priv;
 450 };
 451
 452 /**
 453  * mtd_to_spinand() - Get the SPI NAND device attached to an MTD instance
 454  * @mtd: MTD instance
 455  *
 456  * Return: the SPI NAND device attached to @mtd.
 457  */
 458 static inline struct spinand_device *mtd_to_spinand(struct mtd_info *mtd)
 459 {
 460         return container_of(mtd_to_nanddev(mtd), struct spinand_device, base);
 461 }
 462
 463 /**
 464  * spinand_to_mtd() - Get the MTD device embedded in a SPI NAND device
 465  * @spinand: SPI NAND device
 466  *
 467  * Return: the MTD device embedded in @spinand.
 468  */
 469 static inline struct mtd_info *spinand_to_mtd(struct spinand_device *spinand)
 470 {
 471         return nanddev_to_mtd(&spinand->base);
 472 }
 473
 474 /**
 475  * nand_to_spinand() - Get the SPI NAND device embedding an NAND object
 476  * @nand: NAND object
 477  *
 478  * Return: the SPI NAND device embedding @nand.
 479  */
 480 static inline struct spinand_device *nand_to_spinand(struct nand_device *nand)
 481 {
 482         return container_of(nand, struct spinand_device, base);
 483 }
 484
 485 /**
 486  * spinand_to_nand() - Get the NAND device embedded in a SPI NAND object
 487  * @spinand: SPI NAND device
 488  *
 489  * Return: the NAND device embedded in @spinand.
 490  */
 491 static inline struct nand_device *
 492 spinand_to_nand(struct spinand_device *spinand)
 493 {
 494         return &spinand->base;
 495 }
 496
 497 /**
 498  * spinand_set_of_node - Attach a DT node to a SPI NAND device
 499  * @spinand: SPI NAND device
 500  * @np: DT node
 501  *
 502  * Attach a DT node to a SPI NAND device.
 503  */
 504 static inline void spinand_set_of_node(struct spinand_device *spinand,
 505                                        struct device_node *np)
 506 {
 507         nanddev_set_of_node(&spinand->base, np);
 508 }
 509
 510 int spinand_match_and_init(struct spinand_device *spinand,
 511                            const struct spinand_info *table,
 512                            unsigned int table_size,
 513                            enum spinand_readid_method rdid_method);
 514
 515 int spinand_upd_cfg(struct spinand_device *spinand, u8 mask, u8 val);
 516 int spinand_select_target(struct spinand_device *spinand, unsigned int target);
 517
 518 #endif /* __LINUX_MTD_SPINAND_H */