1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (C) 2014 Freescale Semiconductor, Inc.
6 #ifndef __LINUX_MTD_SPI_NOR_H
7 #define __LINUX_MTD_SPI_NOR_H
9 #include <linux/bitops.h>
10 #include <linux/mtd/cfi.h>
11 #include <linux/mtd/mtd.h>
16 * The first byte returned from the flash after sending opcode SPINOR_OP_RDID.
17 * Sometimes these are the same as CFI IDs, but sometimes they aren't.
19 #define SNOR_MFR_ATMEL CFI_MFR_ATMEL
20 #define SNOR_MFR_GIGADEVICE 0xc8
21 #define SNOR_MFR_INTEL CFI_MFR_INTEL
22 #define SNOR_MFR_ST CFI_MFR_ST /* ST Micro */
23 #define SNOR_MFR_MICRON CFI_MFR_MICRON /* Micron */
24 #define SNOR_MFR_MACRONIX CFI_MFR_MACRONIX
25 #define SNOR_MFR_SPANSION CFI_MFR_AMD
26 #define SNOR_MFR_SST CFI_MFR_SST
27 #define SNOR_MFR_WINBOND 0xef /* Also used by some Spansion */
30 * Note on opcode nomenclature: some opcodes have a format like
31 * SPINOR_OP_FUNCTION{4,}_x_y_z. The numbers x, y, and z stand for the number
32 * of I/O lines used for the opcode, address, and data (respectively). The
33 * FUNCTION has an optional suffix of '4', to represent an opcode which
34 * requires a 4-byte (32-bit) address.
38 #define SPINOR_OP_WREN 0x06 /* Write enable */
39 #define SPINOR_OP_RDSR 0x05 /* Read status register */
40 #define SPINOR_OP_WRSR 0x01 /* Write status register 1 byte */
41 #define SPINOR_OP_RDSR2 0x3f /* Read status register 2 */
42 #define SPINOR_OP_WRSR2 0x3e /* Write status register 2 */
43 #define SPINOR_OP_READ 0x03 /* Read data bytes (low frequency) */
44 #define SPINOR_OP_READ_FAST 0x0b /* Read data bytes (high frequency) */
45 #define SPINOR_OP_READ_1_1_2 0x3b /* Read data bytes (Dual Output SPI) */
46 #define SPINOR_OP_READ_1_2_2 0xbb /* Read data bytes (Dual I/O SPI) */
47 #define SPINOR_OP_READ_1_1_4 0x6b /* Read data bytes (Quad Output SPI) */
48 #define SPINOR_OP_READ_1_4_4 0xeb /* Read data bytes (Quad I/O SPI) */
49 #define SPINOR_OP_READ_1_1_8 0x8b /* Read data bytes (Octal Output SPI) */
50 #define SPINOR_OP_READ_1_8_8 0xcb /* Read data bytes (Octal I/O SPI) */
51 #define SPINOR_OP_PP 0x02 /* Page program (up to 256 bytes) */
52 #define SPINOR_OP_PP_1_1_4 0x32 /* Quad page program */
53 #define SPINOR_OP_PP_1_4_4 0x38 /* Quad page program */
54 #define SPINOR_OP_PP_1_1_8 0x82 /* Octal page program */
55 #define SPINOR_OP_PP_1_8_8 0xc2 /* Octal page program */
56 #define SPINOR_OP_BE_4K 0x20 /* Erase 4KiB block */
57 #define SPINOR_OP_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips */
58 #define SPINOR_OP_BE_32K 0x52 /* Erase 32KiB block */
59 #define SPINOR_OP_CHIP_ERASE 0xc7 /* Erase whole flash chip */
60 #define SPINOR_OP_SE 0xd8 /* Sector erase (usually 64KiB) */
61 #define SPINOR_OP_RDID 0x9f /* Read JEDEC ID */
62 #define SPINOR_OP_RDSFDP 0x5a /* Read SFDP */
63 #define SPINOR_OP_RDCR 0x35 /* Read configuration register */
64 #define SPINOR_OP_RDFSR 0x70 /* Read flag status register */
65 #define SPINOR_OP_CLFSR 0x50 /* Clear flag status register */
66 #define SPINOR_OP_RDEAR 0xc8 /* Read Extended Address Register */
67 #define SPINOR_OP_WREAR 0xc5 /* Write Extended Address Register */
69 /* 4-byte address opcodes - used on Spansion and some Macronix flashes. */
70 #define SPINOR_OP_READ_4B 0x13 /* Read data bytes (low frequency) */
71 #define SPINOR_OP_READ_FAST_4B 0x0c /* Read data bytes (high frequency) */
72 #define SPINOR_OP_READ_1_1_2_4B 0x3c /* Read data bytes (Dual Output SPI) */
73 #define SPINOR_OP_READ_1_2_2_4B 0xbc /* Read data bytes (Dual I/O SPI) */
74 #define SPINOR_OP_READ_1_1_4_4B 0x6c /* Read data bytes (Quad Output SPI) */
75 #define SPINOR_OP_READ_1_4_4_4B 0xec /* Read data bytes (Quad I/O SPI) */
76 #define SPINOR_OP_READ_1_1_8_4B 0x7c /* Read data bytes (Octal Output SPI) */
77 #define SPINOR_OP_READ_1_8_8_4B 0xcc /* Read data bytes (Octal I/O SPI) */
78 #define SPINOR_OP_PP_4B 0x12 /* Page program (up to 256 bytes) */
79 #define SPINOR_OP_PP_1_1_4_4B 0x34 /* Quad page program */
80 #define SPINOR_OP_PP_1_4_4_4B 0x3e /* Quad page program */
81 #define SPINOR_OP_PP_1_1_8_4B 0x84 /* Octal page program */
82 #define SPINOR_OP_PP_1_8_8_4B 0x8e /* Octal page program */
83 #define SPINOR_OP_BE_4K_4B 0x21 /* Erase 4KiB block */
84 #define SPINOR_OP_BE_32K_4B 0x5c /* Erase 32KiB block */
85 #define SPINOR_OP_SE_4B 0xdc /* Sector erase (usually 64KiB) */
87 /* Double Transfer Rate opcodes - defined in JEDEC JESD216B. */
88 #define SPINOR_OP_READ_1_1_1_DTR 0x0d
89 #define SPINOR_OP_READ_1_2_2_DTR 0xbd
90 #define SPINOR_OP_READ_1_4_4_DTR 0xed
92 #define SPINOR_OP_READ_1_1_1_DTR_4B 0x0e
93 #define SPINOR_OP_READ_1_2_2_DTR_4B 0xbe
94 #define SPINOR_OP_READ_1_4_4_DTR_4B 0xee
96 /* Used for SST flashes only. */
97 #define SPINOR_OP_BP 0x02 /* Byte program */
98 #define SPINOR_OP_WRDI 0x04 /* Write disable */
99 #define SPINOR_OP_AAI_WP 0xad /* Auto address increment word program */
101 /* Used for S3AN flashes only */
102 #define SPINOR_OP_XSE 0x50 /* Sector erase */
103 #define SPINOR_OP_XPP 0x82 /* Page program */
104 #define SPINOR_OP_XRDSR 0xd7 /* Read status register */
106 #define XSR_PAGESIZE BIT(0) /* Page size in Po2 or Linear */
107 #define XSR_RDY BIT(7) /* Ready */
110 /* Used for Macronix and Winbond flashes. */
111 #define SPINOR_OP_EN4B 0xb7 /* Enter 4-byte mode */
112 #define SPINOR_OP_EX4B 0xe9 /* Exit 4-byte mode */
114 /* Used for Spansion flashes only. */
115 #define SPINOR_OP_BRWR 0x17 /* Bank register write */
116 #define SPINOR_OP_CLSR 0x30 /* Clear status register 1 */
118 /* Used for Micron flashes only. */
119 #define SPINOR_OP_RD_EVCR 0x65 /* Read EVCR register */
120 #define SPINOR_OP_WD_EVCR 0x61 /* Write EVCR register */
122 /* Status Register bits. */
123 #define SR_WIP BIT(0) /* Write in progress */
124 #define SR_WEL BIT(1) /* Write enable latch */
125 /* meaning of other SR_* bits may differ between vendors */
126 #define SR_BP0 BIT(2) /* Block protect 0 */
127 #define SR_BP1 BIT(3) /* Block protect 1 */
128 #define SR_BP2 BIT(4) /* Block protect 2 */
129 #define SR_TB BIT(5) /* Top/Bottom protect */
130 #define SR_SRWD BIT(7) /* SR write protect */
131 /* Spansion/Cypress specific status bits */
132 #define SR_E_ERR BIT(5)
133 #define SR_P_ERR BIT(6)
135 #define SR_QUAD_EN_MX BIT(6) /* Macronix Quad I/O */
137 /* Enhanced Volatile Configuration Register bits */
138 #define EVCR_QUAD_EN_MICRON BIT(7) /* Micron Quad I/O */
140 /* Flag Status Register bits */
141 #define FSR_READY BIT(7) /* Device status, 0 = Busy, 1 = Ready */
142 #define FSR_E_ERR BIT(5) /* Erase operation status */
143 #define FSR_P_ERR BIT(4) /* Program operation status */
144 #define FSR_PT_ERR BIT(1) /* Protection error bit */
146 /* Configuration Register bits. */
147 #define CR_QUAD_EN_SPAN BIT(1) /* Spansion Quad I/O */
149 /* Status Register 2 bits. */
150 #define SR2_QUAD_EN_BIT7 BIT(7)
152 /* Supported SPI protocols */
153 #define SNOR_PROTO_INST_MASK GENMASK(23, 16)
154 #define SNOR_PROTO_INST_SHIFT 16
155 #define SNOR_PROTO_INST(_nbits) \
156 ((((unsigned long)(_nbits)) << SNOR_PROTO_INST_SHIFT) & \
157 SNOR_PROTO_INST_MASK)
159 #define SNOR_PROTO_ADDR_MASK GENMASK(15, 8)
160 #define SNOR_PROTO_ADDR_SHIFT 8
161 #define SNOR_PROTO_ADDR(_nbits) \
162 ((((unsigned long)(_nbits)) << SNOR_PROTO_ADDR_SHIFT) & \
163 SNOR_PROTO_ADDR_MASK)
165 #define SNOR_PROTO_DATA_MASK GENMASK(7, 0)
166 #define SNOR_PROTO_DATA_SHIFT 0
167 #define SNOR_PROTO_DATA(_nbits) \
168 ((((unsigned long)(_nbits)) << SNOR_PROTO_DATA_SHIFT) & \
169 SNOR_PROTO_DATA_MASK)
171 #define SNOR_PROTO_IS_DTR BIT(24) /* Double Transfer Rate */
173 #define SNOR_PROTO_STR(_inst_nbits, _addr_nbits, _data_nbits) \
174 (SNOR_PROTO_INST(_inst_nbits) | \
175 SNOR_PROTO_ADDR(_addr_nbits) | \
176 SNOR_PROTO_DATA(_data_nbits))
177 #define SNOR_PROTO_DTR(_inst_nbits, _addr_nbits, _data_nbits) \
178 (SNOR_PROTO_IS_DTR | \
179 SNOR_PROTO_STR(_inst_nbits, _addr_nbits, _data_nbits))
181 enum spi_nor_protocol {
182 SNOR_PROTO_1_1_1 = SNOR_PROTO_STR(1, 1, 1),
183 SNOR_PROTO_1_1_2 = SNOR_PROTO_STR(1, 1, 2),
184 SNOR_PROTO_1_1_4 = SNOR_PROTO_STR(1, 1, 4),
185 SNOR_PROTO_1_1_8 = SNOR_PROTO_STR(1, 1, 8),
186 SNOR_PROTO_1_2_2 = SNOR_PROTO_STR(1, 2, 2),
187 SNOR_PROTO_1_4_4 = SNOR_PROTO_STR(1, 4, 4),
188 SNOR_PROTO_1_8_8 = SNOR_PROTO_STR(1, 8, 8),
189 SNOR_PROTO_2_2_2 = SNOR_PROTO_STR(2, 2, 2),
190 SNOR_PROTO_4_4_4 = SNOR_PROTO_STR(4, 4, 4),
191 SNOR_PROTO_8_8_8 = SNOR_PROTO_STR(8, 8, 8),
193 SNOR_PROTO_1_1_1_DTR = SNOR_PROTO_DTR(1, 1, 1),
194 SNOR_PROTO_1_2_2_DTR = SNOR_PROTO_DTR(1, 2, 2),
195 SNOR_PROTO_1_4_4_DTR = SNOR_PROTO_DTR(1, 4, 4),
196 SNOR_PROTO_1_8_8_DTR = SNOR_PROTO_DTR(1, 8, 8),
199 static inline bool spi_nor_protocol_is_dtr(enum spi_nor_protocol proto)
201 return !!(proto & SNOR_PROTO_IS_DTR);
204 static inline u8 spi_nor_get_protocol_inst_nbits(enum spi_nor_protocol proto)
206 return ((unsigned long)(proto & SNOR_PROTO_INST_MASK)) >>
207 SNOR_PROTO_INST_SHIFT;
210 static inline u8 spi_nor_get_protocol_addr_nbits(enum spi_nor_protocol proto)
212 return ((unsigned long)(proto & SNOR_PROTO_ADDR_MASK)) >>
213 SNOR_PROTO_ADDR_SHIFT;
216 static inline u8 spi_nor_get_protocol_data_nbits(enum spi_nor_protocol proto)
218 return ((unsigned long)(proto & SNOR_PROTO_DATA_MASK)) >>
219 SNOR_PROTO_DATA_SHIFT;
222 static inline u8 spi_nor_get_protocol_width(enum spi_nor_protocol proto)
224 return spi_nor_get_protocol_data_nbits(proto);
227 #define SPI_NOR_MAX_CMD_SIZE 8
229 SPI_NOR_OPS_READ = 0,
236 enum spi_nor_option_flags {
237 SNOR_F_USE_FSR = BIT(0),
238 SNOR_F_HAS_SR_TB = BIT(1),
239 SNOR_F_NO_OP_CHIP_ERASE = BIT(2),
240 SNOR_F_S3AN_ADDR_DEFAULT = BIT(3),
241 SNOR_F_READY_XSR_RDY = BIT(4),
242 SNOR_F_USE_CLSR = BIT(5),
243 SNOR_F_BROKEN_RESET = BIT(6),
244 SNOR_F_4B_OPCODES = BIT(7),
245 SNOR_F_HAS_4BAIT = BIT(8),
249 * struct spi_nor_erase_type - Structure to describe a SPI NOR erase type
250 * @size: the size of the sector/block erased by the erase type.
251 * JEDEC JESD216B imposes erase sizes to be a power of 2.
252 * @size_shift: @size is a power of 2, the shift is stored in
254 * @size_mask: the size mask based on @size_shift.
255 * @opcode: the SPI command op code to erase the sector/block.
256 * @idx: Erase Type index as sorted in the Basic Flash Parameter
257 * Table. It will be used to synchronize the supported
258 * Erase Types with the ones identified in the SFDP
261 struct spi_nor_erase_type {
270 * struct spi_nor_erase_command - Used for non-uniform erases
271 * The structure is used to describe a list of erase commands to be executed
272 * once we validate that the erase can be performed. The elements in the list
273 * are run-length encoded.
274 * @list: for inclusion into the list of erase commands.
275 * @count: how many times the same erase command should be
276 * consecutively used.
277 * @size: the size of the sector/block erased by the command.
278 * @opcode: the SPI command op code to erase the sector/block.
280 struct spi_nor_erase_command {
281 struct list_head list;
288 * struct spi_nor_erase_region - Structure to describe a SPI NOR erase region
289 * @offset: the offset in the data array of erase region start.
290 * LSB bits are used as a bitmask encoding flags to
291 * determine if this region is overlaid, if this region is
292 * the last in the SPI NOR flash memory and to indicate
293 * all the supported erase commands inside this region.
294 * The erase types are sorted in ascending order with the
295 * smallest Erase Type size being at BIT(0).
296 * @size: the size of the region in bytes.
298 struct spi_nor_erase_region {
303 #define SNOR_ERASE_TYPE_MAX 4
304 #define SNOR_ERASE_TYPE_MASK GENMASK_ULL(SNOR_ERASE_TYPE_MAX - 1, 0)
306 #define SNOR_LAST_REGION BIT(4)
307 #define SNOR_OVERLAID_REGION BIT(5)
309 #define SNOR_ERASE_FLAGS_MAX 6
310 #define SNOR_ERASE_FLAGS_MASK GENMASK_ULL(SNOR_ERASE_FLAGS_MAX - 1, 0)
313 * struct spi_nor_erase_map - Structure to describe the SPI NOR erase map
314 * @regions: array of erase regions. The regions are consecutive in
315 * address space. Walking through the regions is done
317 * @uniform_region: a pre-allocated erase region for SPI NOR with a uniform
318 * sector size (legacy implementation).
319 * @erase_type: an array of erase types shared by all the regions.
320 * The erase types are sorted in ascending order, with the
321 * smallest Erase Type size being the first member in the
323 * @uniform_erase_type: bitmask encoding erase types that can erase the
324 * entire memory. This member is completed at init by
325 * uniform and non-uniform SPI NOR flash memories if they
326 * support at least one erase type that can erase the
329 struct spi_nor_erase_map {
330 struct spi_nor_erase_region *regions;
331 struct spi_nor_erase_region uniform_region;
332 struct spi_nor_erase_type erase_type[SNOR_ERASE_TYPE_MAX];
333 u8 uniform_erase_type;
337 * struct flash_info - Forward declaration of a structure used internally by
343 * struct spi_nor - Structure for defining a the SPI NOR layer
344 * @mtd: point to a mtd_info structure
345 * @lock: the lock for the read/write/erase/lock/unlock operations
346 * @dev: point to a spi device, or a spi nor controller device.
347 * @info: spi-nor part JDEC MFR id and other info
348 * @page_size: the page size of the SPI NOR
349 * @addr_width: number of address bytes
350 * @erase_opcode: the opcode for erasing a sector
351 * @read_opcode: the read opcode
352 * @read_dummy: the dummy needed by the read operation
353 * @program_opcode: the program opcode
354 * @sst_write_second: used by the SST write operation
355 * @flags: flag options for the current SPI-NOR (SNOR_F_*)
356 * @read_proto: the SPI protocol for read operations
357 * @write_proto: the SPI protocol for write operations
358 * @reg_proto the SPI protocol for read_reg/write_reg/erase operations
359 * @cmd_buf: used by the write_reg
360 * @erase_map: the erase map of the SPI NOR
361 * @prepare: [OPTIONAL] do some preparations for the
362 * read/write/erase/lock/unlock operations
363 * @unprepare: [OPTIONAL] do some post work after the
364 * read/write/erase/lock/unlock operations
365 * @read_reg: [DRIVER-SPECIFIC] read out the register
366 * @write_reg: [DRIVER-SPECIFIC] write data to the register
367 * @read: [DRIVER-SPECIFIC] read data from the SPI NOR
368 * @write: [DRIVER-SPECIFIC] write data to the SPI NOR
369 * @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR
370 * at the offset @offs; if not provided by the driver,
371 * spi-nor will send the erase opcode via write_reg()
372 * @flash_lock: [FLASH-SPECIFIC] lock a region of the SPI NOR
373 * @flash_unlock: [FLASH-SPECIFIC] unlock a region of the SPI NOR
374 * @flash_is_locked: [FLASH-SPECIFIC] check if a region of the SPI NOR is
375 * @quad_enable: [FLASH-SPECIFIC] enables SPI NOR quad mode
376 * @clear_sr_bp: [FLASH-SPECIFIC] clears the Block Protection Bits from
377 * the SPI NOR Status Register.
379 * @priv: the private data
385 const struct flash_info *info;
392 enum spi_nor_protocol read_proto;
393 enum spi_nor_protocol write_proto;
394 enum spi_nor_protocol reg_proto;
395 bool sst_write_second;
397 u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
398 struct spi_nor_erase_map erase_map;
400 int (*prepare)(struct spi_nor *nor, enum spi_nor_ops ops);
401 void (*unprepare)(struct spi_nor *nor, enum spi_nor_ops ops);
402 int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len);
403 int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len);
405 ssize_t (*read)(struct spi_nor *nor, loff_t from,
406 size_t len, u_char *read_buf);
407 ssize_t (*write)(struct spi_nor *nor, loff_t to,
408 size_t len, const u_char *write_buf);
409 int (*erase)(struct spi_nor *nor, loff_t offs);
411 int (*flash_lock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
412 int (*flash_unlock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
413 int (*flash_is_locked)(struct spi_nor *nor, loff_t ofs, uint64_t len);
414 int (*quad_enable)(struct spi_nor *nor);
415 int (*clear_sr_bp)(struct spi_nor *nor);
420 static u64 __maybe_unused
421 spi_nor_region_is_last(const struct spi_nor_erase_region *region)
423 return region->offset & SNOR_LAST_REGION;
426 static u64 __maybe_unused
427 spi_nor_region_end(const struct spi_nor_erase_region *region)
429 return (region->offset & ~SNOR_ERASE_FLAGS_MASK) + region->size;
432 static void __maybe_unused
433 spi_nor_region_mark_end(struct spi_nor_erase_region *region)
435 region->offset |= SNOR_LAST_REGION;
438 static void __maybe_unused
439 spi_nor_region_mark_overlay(struct spi_nor_erase_region *region)
441 region->offset |= SNOR_OVERLAID_REGION;
444 static bool __maybe_unused spi_nor_has_uniform_erase(const struct spi_nor *nor)
446 return !!nor->erase_map.uniform_erase_type;
449 static inline void spi_nor_set_flash_node(struct spi_nor *nor,
450 struct device_node *np)
452 mtd_set_of_node(&nor->mtd, np);
455 static inline struct device_node *spi_nor_get_flash_node(struct spi_nor *nor)
457 return mtd_get_of_node(&nor->mtd);
461 * struct spi_nor_hwcaps - Structure for describing the hardware capabilies
462 * supported by the SPI controller (bus master).
463 * @mask: the bitmask listing all the supported hw capabilies
465 struct spi_nor_hwcaps {
470 *(Fast) Read capabilities.
471 * MUST be ordered by priority: the higher bit position, the higher priority.
472 * As a matter of performances, it is relevant to use Octal SPI protocols first,
473 * then Quad SPI protocols before Dual SPI protocols, Fast Read and lastly
476 #define SNOR_HWCAPS_READ_MASK GENMASK(14, 0)
477 #define SNOR_HWCAPS_READ BIT(0)
478 #define SNOR_HWCAPS_READ_FAST BIT(1)
479 #define SNOR_HWCAPS_READ_1_1_1_DTR BIT(2)
481 #define SNOR_HWCAPS_READ_DUAL GENMASK(6, 3)
482 #define SNOR_HWCAPS_READ_1_1_2 BIT(3)
483 #define SNOR_HWCAPS_READ_1_2_2 BIT(4)
484 #define SNOR_HWCAPS_READ_2_2_2 BIT(5)
485 #define SNOR_HWCAPS_READ_1_2_2_DTR BIT(6)
487 #define SNOR_HWCAPS_READ_QUAD GENMASK(10, 7)
488 #define SNOR_HWCAPS_READ_1_1_4 BIT(7)
489 #define SNOR_HWCAPS_READ_1_4_4 BIT(8)
490 #define SNOR_HWCAPS_READ_4_4_4 BIT(9)
491 #define SNOR_HWCAPS_READ_1_4_4_DTR BIT(10)
493 #define SNOR_HWCAPS_READ_OCTAL GENMASK(14, 11)
494 #define SNOR_HWCAPS_READ_1_1_8 BIT(11)
495 #define SNOR_HWCAPS_READ_1_8_8 BIT(12)
496 #define SNOR_HWCAPS_READ_8_8_8 BIT(13)
497 #define SNOR_HWCAPS_READ_1_8_8_DTR BIT(14)
500 * Page Program capabilities.
501 * MUST be ordered by priority: the higher bit position, the higher priority.
502 * Like (Fast) Read capabilities, Octal/Quad SPI protocols are preferred to the
503 * legacy SPI 1-1-1 protocol.
504 * Note that Dual Page Programs are not supported because there is no existing
505 * JEDEC/SFDP standard to define them. Also at this moment no SPI flash memory
506 * implements such commands.
508 #define SNOR_HWCAPS_PP_MASK GENMASK(22, 16)
509 #define SNOR_HWCAPS_PP BIT(16)
511 #define SNOR_HWCAPS_PP_QUAD GENMASK(19, 17)
512 #define SNOR_HWCAPS_PP_1_1_4 BIT(17)
513 #define SNOR_HWCAPS_PP_1_4_4 BIT(18)
514 #define SNOR_HWCAPS_PP_4_4_4 BIT(19)
516 #define SNOR_HWCAPS_PP_OCTAL GENMASK(22, 20)
517 #define SNOR_HWCAPS_PP_1_1_8 BIT(20)
518 #define SNOR_HWCAPS_PP_1_8_8 BIT(21)
519 #define SNOR_HWCAPS_PP_8_8_8 BIT(22)
522 * spi_nor_scan() - scan the SPI NOR
523 * @nor: the spi_nor structure
524 * @name: the chip type name
525 * @hwcaps: the hardware capabilities supported by the controller driver
527 * The drivers can use this fuction to scan the SPI NOR.
528 * In the scanning, it will try to get all the necessary information to
529 * fill the mtd_info{} and the spi_nor{}.
531 * The chip type name can be provided through the @name parameter.
533 * Return: 0 for success, others for failure.
535 int spi_nor_scan(struct spi_nor *nor, const char *name,
536 const struct spi_nor_hwcaps *hwcaps);
539 * spi_nor_restore_addr_mode() - restore the status of SPI NOR
540 * @nor: the spi_nor structure
542 void spi_nor_restore(struct spi_nor *nor);