1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2005, Intec Automation Inc.
4 * Copyright (C) 2014, Freescale Semiconductor, Inc.
7 #include <linux/bitfield.h>
8 #include <linux/slab.h>
9 #include <linux/sort.h>
10 #include <linux/mtd/spi-nor.h>
14 #define SFDP_PARAM_HEADER_ID(p) (((p)->id_msb << 8) | (p)->id_lsb)
15 #define SFDP_PARAM_HEADER_PTP(p) \
16 (((p)->parameter_table_pointer[2] << 16) | \
17 ((p)->parameter_table_pointer[1] << 8) | \
18 ((p)->parameter_table_pointer[0] << 0))
19 #define SFDP_PARAM_HEADER_PARAM_LEN(p) ((p)->length * 4)
21 #define SFDP_BFPT_ID 0xff00 /* Basic Flash Parameter Table */
22 #define SFDP_SECTOR_MAP_ID 0xff81 /* Sector Map Table */
23 #define SFDP_4BAIT_ID 0xff84 /* 4-byte Address Instruction Table */
24 #define SFDP_PROFILE1_ID 0xff05 /* xSPI Profile 1.0 table. */
25 #define SFDP_SCCR_MAP_ID 0xff87 /*
26 * Status, Control and Configuration
30 #define SFDP_SIGNATURE 0x50444653U
33 u32 signature; /* Ox50444653U <=> "SFDP" */
36 u8 nph; /* 0-base number of parameter headers */
39 /* Basic Flash Parameter Table. */
40 struct sfdp_parameter_header bfpt_header;
43 /* Fast Read settings. */
44 struct sfdp_bfpt_read {
45 /* The Fast Read x-y-z hardware capability in params->hwcaps.mask. */
49 * The <supported_bit> bit in <supported_dword> BFPT DWORD tells us
50 * whether the Fast Read x-y-z command is supported.
56 * The half-word at offset <setting_shift> in <setting_dword> BFPT DWORD
57 * encodes the op code, the number of mode clocks and the number of wait
58 * states to be used by Fast Read x-y-z command.
63 /* The SPI protocol for this Fast Read x-y-z command. */
64 enum spi_nor_protocol proto;
67 struct sfdp_bfpt_erase {
69 * The half-word at offset <shift> in DWORD <dword> encodes the
70 * op code and erase sector size to be used by Sector Erase commands.
76 #define SMPT_CMD_ADDRESS_LEN_MASK GENMASK(23, 22)
77 #define SMPT_CMD_ADDRESS_LEN_0 (0x0UL << 22)
78 #define SMPT_CMD_ADDRESS_LEN_3 (0x1UL << 22)
79 #define SMPT_CMD_ADDRESS_LEN_4 (0x2UL << 22)
80 #define SMPT_CMD_ADDRESS_LEN_USE_CURRENT (0x3UL << 22)
82 #define SMPT_CMD_READ_DUMMY_MASK GENMASK(19, 16)
83 #define SMPT_CMD_READ_DUMMY_SHIFT 16
84 #define SMPT_CMD_READ_DUMMY(_cmd) \
85 (((_cmd) & SMPT_CMD_READ_DUMMY_MASK) >> SMPT_CMD_READ_DUMMY_SHIFT)
86 #define SMPT_CMD_READ_DUMMY_IS_VARIABLE 0xfUL
88 #define SMPT_CMD_READ_DATA_MASK GENMASK(31, 24)
89 #define SMPT_CMD_READ_DATA_SHIFT 24
90 #define SMPT_CMD_READ_DATA(_cmd) \
91 (((_cmd) & SMPT_CMD_READ_DATA_MASK) >> SMPT_CMD_READ_DATA_SHIFT)
93 #define SMPT_CMD_OPCODE_MASK GENMASK(15, 8)
94 #define SMPT_CMD_OPCODE_SHIFT 8
95 #define SMPT_CMD_OPCODE(_cmd) \
96 (((_cmd) & SMPT_CMD_OPCODE_MASK) >> SMPT_CMD_OPCODE_SHIFT)
98 #define SMPT_MAP_REGION_COUNT_MASK GENMASK(23, 16)
99 #define SMPT_MAP_REGION_COUNT_SHIFT 16
100 #define SMPT_MAP_REGION_COUNT(_header) \
101 ((((_header) & SMPT_MAP_REGION_COUNT_MASK) >> \
102 SMPT_MAP_REGION_COUNT_SHIFT) + 1)
104 #define SMPT_MAP_ID_MASK GENMASK(15, 8)
105 #define SMPT_MAP_ID_SHIFT 8
106 #define SMPT_MAP_ID(_header) \
107 (((_header) & SMPT_MAP_ID_MASK) >> SMPT_MAP_ID_SHIFT)
109 #define SMPT_MAP_REGION_SIZE_MASK GENMASK(31, 8)
110 #define SMPT_MAP_REGION_SIZE_SHIFT 8
111 #define SMPT_MAP_REGION_SIZE(_region) \
112 (((((_region) & SMPT_MAP_REGION_SIZE_MASK) >> \
113 SMPT_MAP_REGION_SIZE_SHIFT) + 1) * 256)
115 #define SMPT_MAP_REGION_ERASE_TYPE_MASK GENMASK(3, 0)
116 #define SMPT_MAP_REGION_ERASE_TYPE(_region) \
117 ((_region) & SMPT_MAP_REGION_ERASE_TYPE_MASK)
119 #define SMPT_DESC_TYPE_MAP BIT(1)
120 #define SMPT_DESC_END BIT(0)
122 #define SFDP_4BAIT_DWORD_MAX 2
125 /* The hardware capability. */
129 * The <supported_bit> bit in DWORD1 of the 4BAIT tells us whether
130 * the associated 4-byte address op code is supported.
136 * spi_nor_read_raw() - raw read of serial flash memory. read_opcode,
137 * addr_nbytes and read_dummy members of the struct spi_nor
138 * should be previously set.
139 * @nor: pointer to a 'struct spi_nor'
140 * @addr: offset in the serial flash memory
141 * @len: number of bytes to read
142 * @buf: buffer where the data is copied into (dma-safe memory)
144 * Return: 0 on success, -errno otherwise.
146 static int spi_nor_read_raw(struct spi_nor *nor, u32 addr, size_t len, u8 *buf)
151 ret = spi_nor_read_data(nor, addr, len, buf);
154 if (!ret || ret > len)
165 * spi_nor_read_sfdp() - read Serial Flash Discoverable Parameters.
166 * @nor: pointer to a 'struct spi_nor'
167 * @addr: offset in the SFDP area to start reading data from
168 * @len: number of bytes to read
169 * @buf: buffer where the SFDP data are copied into (dma-safe memory)
171 * Whatever the actual numbers of bytes for address and dummy cycles are
172 * for (Fast) Read commands, the Read SFDP (5Ah) instruction is always
173 * followed by a 3-byte address and 8 dummy clock cycles.
175 * Return: 0 on success, -errno otherwise.
177 static int spi_nor_read_sfdp(struct spi_nor *nor, u32 addr,
178 size_t len, void *buf)
180 u8 addr_nbytes, read_opcode, read_dummy;
183 read_opcode = nor->read_opcode;
184 addr_nbytes = nor->addr_nbytes;
185 read_dummy = nor->read_dummy;
187 nor->read_opcode = SPINOR_OP_RDSFDP;
188 nor->addr_nbytes = 3;
191 ret = spi_nor_read_raw(nor, addr, len, buf);
193 nor->read_opcode = read_opcode;
194 nor->addr_nbytes = addr_nbytes;
195 nor->read_dummy = read_dummy;
201 * spi_nor_read_sfdp_dma_unsafe() - read Serial Flash Discoverable Parameters.
202 * @nor: pointer to a 'struct spi_nor'
203 * @addr: offset in the SFDP area to start reading data from
204 * @len: number of bytes to read
205 * @buf: buffer where the SFDP data are copied into
207 * Wrap spi_nor_read_sfdp() using a kmalloc'ed bounce buffer as @buf is now not
208 * guaranteed to be dma-safe.
210 * Return: -ENOMEM if kmalloc() fails, the return code of spi_nor_read_sfdp()
213 static int spi_nor_read_sfdp_dma_unsafe(struct spi_nor *nor, u32 addr,
214 size_t len, void *buf)
219 dma_safe_buf = kmalloc(len, GFP_KERNEL);
223 ret = spi_nor_read_sfdp(nor, addr, len, dma_safe_buf);
224 memcpy(buf, dma_safe_buf, len);
231 spi_nor_set_read_settings_from_bfpt(struct spi_nor_read_command *read,
233 enum spi_nor_protocol proto)
235 read->num_mode_clocks = (half >> 5) & 0x07;
236 read->num_wait_states = (half >> 0) & 0x1f;
237 read->opcode = (half >> 8) & 0xff;
241 static const struct sfdp_bfpt_read sfdp_bfpt_reads[] = {
242 /* Fast Read 1-1-2 */
244 SNOR_HWCAPS_READ_1_1_2,
245 BFPT_DWORD(1), BIT(16), /* Supported bit */
246 BFPT_DWORD(4), 0, /* Settings */
250 /* Fast Read 1-2-2 */
252 SNOR_HWCAPS_READ_1_2_2,
253 BFPT_DWORD(1), BIT(20), /* Supported bit */
254 BFPT_DWORD(4), 16, /* Settings */
258 /* Fast Read 2-2-2 */
260 SNOR_HWCAPS_READ_2_2_2,
261 BFPT_DWORD(5), BIT(0), /* Supported bit */
262 BFPT_DWORD(6), 16, /* Settings */
266 /* Fast Read 1-1-4 */
268 SNOR_HWCAPS_READ_1_1_4,
269 BFPT_DWORD(1), BIT(22), /* Supported bit */
270 BFPT_DWORD(3), 16, /* Settings */
274 /* Fast Read 1-4-4 */
276 SNOR_HWCAPS_READ_1_4_4,
277 BFPT_DWORD(1), BIT(21), /* Supported bit */
278 BFPT_DWORD(3), 0, /* Settings */
282 /* Fast Read 4-4-4 */
284 SNOR_HWCAPS_READ_4_4_4,
285 BFPT_DWORD(5), BIT(4), /* Supported bit */
286 BFPT_DWORD(7), 16, /* Settings */
291 static const struct sfdp_bfpt_erase sfdp_bfpt_erases[] = {
292 /* Erase Type 1 in DWORD8 bits[15:0] */
295 /* Erase Type 2 in DWORD8 bits[31:16] */
298 /* Erase Type 3 in DWORD9 bits[15:0] */
301 /* Erase Type 4 in DWORD9 bits[31:16] */
306 * spi_nor_set_erase_settings_from_bfpt() - set erase type settings from BFPT
307 * @erase: pointer to a structure that describes a SPI NOR erase type
308 * @size: the size of the sector/block erased by the erase type
309 * @opcode: the SPI command op code to erase the sector/block
310 * @i: erase type index as sorted in the Basic Flash Parameter Table
312 * The supported Erase Types will be sorted at init in ascending order, with
313 * the smallest Erase Type size being the first member in the erase_type array
314 * of the spi_nor_erase_map structure. Save the Erase Type index as sorted in
315 * the Basic Flash Parameter Table since it will be used later on to
316 * synchronize with the supported Erase Types defined in SFDP optional tables.
319 spi_nor_set_erase_settings_from_bfpt(struct spi_nor_erase_type *erase,
320 u32 size, u8 opcode, u8 i)
323 spi_nor_set_erase_type(erase, size, opcode);
327 * spi_nor_map_cmp_erase_type() - compare the map's erase types by size
328 * @l: member in the left half of the map's erase_type array
329 * @r: member in the right half of the map's erase_type array
331 * Comparison function used in the sort() call to sort in ascending order the
332 * map's erase types, the smallest erase type size being the first member in the
333 * sorted erase_type array.
335 * Return: the result of @l->size - @r->size
337 static int spi_nor_map_cmp_erase_type(const void *l, const void *r)
339 const struct spi_nor_erase_type *left = l, *right = r;
341 return left->size - right->size;
345 * spi_nor_sort_erase_mask() - sort erase mask
346 * @map: the erase map of the SPI NOR
347 * @erase_mask: the erase type mask to be sorted
349 * Replicate the sort done for the map's erase types in BFPT: sort the erase
350 * mask in ascending order with the smallest erase type size starting from
351 * BIT(0) in the sorted erase mask.
353 * Return: sorted erase mask.
355 static u8 spi_nor_sort_erase_mask(struct spi_nor_erase_map *map, u8 erase_mask)
357 struct spi_nor_erase_type *erase_type = map->erase_type;
359 u8 sorted_erase_mask = 0;
364 /* Replicate the sort done for the map's erase types. */
365 for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++)
366 if (erase_type[i].size && erase_mask & BIT(erase_type[i].idx))
367 sorted_erase_mask |= BIT(i);
369 return sorted_erase_mask;
373 * spi_nor_regions_sort_erase_types() - sort erase types in each region
374 * @map: the erase map of the SPI NOR
376 * Function assumes that the erase types defined in the erase map are already
377 * sorted in ascending order, with the smallest erase type size being the first
378 * member in the erase_type array. It replicates the sort done for the map's
379 * erase types. Each region's erase bitmask will indicate which erase types are
380 * supported from the sorted erase types defined in the erase map.
381 * Sort the all region's erase type at init in order to speed up the process of
382 * finding the best erase command at runtime.
384 static void spi_nor_regions_sort_erase_types(struct spi_nor_erase_map *map)
386 struct spi_nor_erase_region *region = map->regions;
387 u8 region_erase_mask, sorted_erase_mask;
390 region_erase_mask = region->offset & SNOR_ERASE_TYPE_MASK;
392 sorted_erase_mask = spi_nor_sort_erase_mask(map,
395 /* Overwrite erase mask. */
396 region->offset = (region->offset & ~SNOR_ERASE_TYPE_MASK) |
399 region = spi_nor_region_next(region);
404 * spi_nor_parse_bfpt() - read and parse the Basic Flash Parameter Table.
405 * @nor: pointer to a 'struct spi_nor'
406 * @bfpt_header: pointer to the 'struct sfdp_parameter_header' describing
407 * the Basic Flash Parameter Table length and version
409 * The Basic Flash Parameter Table is the main and only mandatory table as
410 * defined by the SFDP (JESD216) specification.
411 * It provides us with the total size (memory density) of the data array and
412 * the number of address bytes for Fast Read, Page Program and Sector Erase
414 * For Fast READ commands, it also gives the number of mode clock cycles and
415 * wait states (regrouped in the number of dummy clock cycles) for each
416 * supported instruction op code.
417 * For Page Program, the page size is now available since JESD216 rev A, however
418 * the supported instruction op codes are still not provided.
419 * For Sector Erase commands, this table stores the supported instruction op
420 * codes and the associated sector sizes.
421 * Finally, the Quad Enable Requirements (QER) are also available since JESD216
422 * rev A. The QER bits encode the manufacturer dependent procedure to be
423 * executed to set the Quad Enable (QE) bit in some internal register of the
424 * Quad SPI memory. Indeed the QE bit, when it exists, must be set before
425 * sending any Quad SPI command to the memory. Actually, setting the QE bit
426 * tells the memory to reassign its WP# and HOLD#/RESET# pins to functions IO2
427 * and IO3 hence enabling 4 (Quad) I/O lines.
429 * Return: 0 on success, -errno otherwise.
431 static int spi_nor_parse_bfpt(struct spi_nor *nor,
432 const struct sfdp_parameter_header *bfpt_header)
434 struct spi_nor_flash_parameter *params = nor->params;
435 struct spi_nor_erase_map *map = ¶ms->erase_map;
436 struct spi_nor_erase_type *erase_type = map->erase_type;
437 struct sfdp_bfpt bfpt;
444 /* JESD216 Basic Flash Parameter Table length is at least 9 DWORDs. */
445 if (bfpt_header->length < BFPT_DWORD_MAX_JESD216)
448 /* Read the Basic Flash Parameter Table. */
449 len = min_t(size_t, sizeof(bfpt),
450 bfpt_header->length * sizeof(u32));
451 addr = SFDP_PARAM_HEADER_PTP(bfpt_header);
452 memset(&bfpt, 0, sizeof(bfpt));
453 err = spi_nor_read_sfdp_dma_unsafe(nor, addr, len, &bfpt);
457 /* Fix endianness of the BFPT DWORDs. */
458 le32_to_cpu_array(bfpt.dwords, BFPT_DWORD_MAX);
460 /* Number of address bytes. */
461 switch (bfpt.dwords[BFPT_DWORD(1)] & BFPT_DWORD1_ADDRESS_BYTES_MASK) {
462 case BFPT_DWORD1_ADDRESS_BYTES_3_ONLY:
463 case BFPT_DWORD1_ADDRESS_BYTES_3_OR_4:
464 params->addr_nbytes = 3;
465 params->addr_mode_nbytes = 3;
468 case BFPT_DWORD1_ADDRESS_BYTES_4_ONLY:
469 params->addr_nbytes = 4;
470 params->addr_mode_nbytes = 4;
477 /* Flash Memory Density (in bits). */
478 val = bfpt.dwords[BFPT_DWORD(2)];
483 * Prevent overflows on params->size. Anyway, a NOR of 2^64
484 * bits is unlikely to exist so this error probably means
485 * the BFPT we are reading is corrupted/wrong.
490 params->size = 1ULL << val;
492 params->size = val + 1;
494 params->size >>= 3; /* Convert to bytes. */
496 /* Fast Read settings. */
497 for (i = 0; i < ARRAY_SIZE(sfdp_bfpt_reads); i++) {
498 const struct sfdp_bfpt_read *rd = &sfdp_bfpt_reads[i];
499 struct spi_nor_read_command *read;
501 if (!(bfpt.dwords[rd->supported_dword] & rd->supported_bit)) {
502 params->hwcaps.mask &= ~rd->hwcaps;
506 params->hwcaps.mask |= rd->hwcaps;
507 cmd = spi_nor_hwcaps_read2cmd(rd->hwcaps);
508 read = ¶ms->reads[cmd];
509 half = bfpt.dwords[rd->settings_dword] >> rd->settings_shift;
510 spi_nor_set_read_settings_from_bfpt(read, half, rd->proto);
514 * Sector Erase settings. Reinitialize the uniform erase map using the
515 * Erase Types defined in the bfpt table.
518 memset(¶ms->erase_map, 0, sizeof(params->erase_map));
519 for (i = 0; i < ARRAY_SIZE(sfdp_bfpt_erases); i++) {
520 const struct sfdp_bfpt_erase *er = &sfdp_bfpt_erases[i];
524 half = bfpt.dwords[er->dword] >> er->shift;
525 erasesize = half & 0xff;
527 /* erasesize == 0 means this Erase Type is not supported. */
531 erasesize = 1U << erasesize;
532 opcode = (half >> 8) & 0xff;
533 erase_mask |= BIT(i);
534 spi_nor_set_erase_settings_from_bfpt(&erase_type[i], erasesize,
537 spi_nor_init_uniform_erase_map(map, erase_mask, params->size);
539 * Sort all the map's Erase Types in ascending order with the smallest
540 * erase size being the first member in the erase_type array.
542 sort(erase_type, SNOR_ERASE_TYPE_MAX, sizeof(erase_type[0]),
543 spi_nor_map_cmp_erase_type, NULL);
545 * Sort the erase types in the uniform region in order to update the
546 * uniform_erase_type bitmask. The bitmask will be used later on when
547 * selecting the uniform erase.
549 spi_nor_regions_sort_erase_types(map);
550 map->uniform_erase_type = map->uniform_region.offset &
551 SNOR_ERASE_TYPE_MASK;
553 /* Stop here if not JESD216 rev A or later. */
554 if (bfpt_header->length == BFPT_DWORD_MAX_JESD216)
555 return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt);
557 /* Page size: this field specifies 'N' so the page size = 2^N bytes. */
558 val = bfpt.dwords[BFPT_DWORD(11)];
559 val &= BFPT_DWORD11_PAGE_SIZE_MASK;
560 val >>= BFPT_DWORD11_PAGE_SIZE_SHIFT;
561 params->page_size = 1U << val;
563 /* Quad Enable Requirements. */
564 switch (bfpt.dwords[BFPT_DWORD(15)] & BFPT_DWORD15_QER_MASK) {
565 case BFPT_DWORD15_QER_NONE:
566 params->quad_enable = NULL;
569 case BFPT_DWORD15_QER_SR2_BIT1_BUGGY:
571 * Writing only one byte to the Status Register has the
572 * side-effect of clearing Status Register 2.
574 case BFPT_DWORD15_QER_SR2_BIT1_NO_RD:
576 * Read Configuration Register (35h) instruction is not
579 nor->flags |= SNOR_F_HAS_16BIT_SR | SNOR_F_NO_READ_CR;
580 params->quad_enable = spi_nor_sr2_bit1_quad_enable;
583 case BFPT_DWORD15_QER_SR1_BIT6:
584 nor->flags &= ~SNOR_F_HAS_16BIT_SR;
585 params->quad_enable = spi_nor_sr1_bit6_quad_enable;
588 case BFPT_DWORD15_QER_SR2_BIT7:
589 nor->flags &= ~SNOR_F_HAS_16BIT_SR;
590 params->quad_enable = spi_nor_sr2_bit7_quad_enable;
593 case BFPT_DWORD15_QER_SR2_BIT1:
595 * JESD216 rev B or later does not specify if writing only one
596 * byte to the Status Register clears or not the Status
597 * Register 2, so let's be cautious and keep the default
598 * assumption of a 16-bit Write Status (01h) command.
600 nor->flags |= SNOR_F_HAS_16BIT_SR;
602 params->quad_enable = spi_nor_sr2_bit1_quad_enable;
606 dev_dbg(nor->dev, "BFPT QER reserved value used\n");
610 /* Soft Reset support. */
611 if (bfpt.dwords[BFPT_DWORD(16)] & BFPT_DWORD16_SWRST_EN_RST)
612 nor->flags |= SNOR_F_SOFT_RESET;
614 /* Stop here if not JESD216 rev C or later. */
615 if (bfpt_header->length == BFPT_DWORD_MAX_JESD216B)
616 return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt);
618 /* 8D-8D-8D command extension. */
619 switch (bfpt.dwords[BFPT_DWORD(18)] & BFPT_DWORD18_CMD_EXT_MASK) {
620 case BFPT_DWORD18_CMD_EXT_REP:
621 nor->cmd_ext_type = SPI_NOR_EXT_REPEAT;
624 case BFPT_DWORD18_CMD_EXT_INV:
625 nor->cmd_ext_type = SPI_NOR_EXT_INVERT;
628 case BFPT_DWORD18_CMD_EXT_RES:
629 dev_dbg(nor->dev, "Reserved command extension used\n");
632 case BFPT_DWORD18_CMD_EXT_16B:
633 dev_dbg(nor->dev, "16-bit opcodes not supported\n");
637 return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt);
641 * spi_nor_smpt_addr_nbytes() - return the number of address bytes used in the
642 * configuration detection command.
643 * @nor: pointer to a 'struct spi_nor'
644 * @settings: configuration detection command descriptor, dword1
646 static u8 spi_nor_smpt_addr_nbytes(const struct spi_nor *nor, const u32 settings)
648 switch (settings & SMPT_CMD_ADDRESS_LEN_MASK) {
649 case SMPT_CMD_ADDRESS_LEN_0:
651 case SMPT_CMD_ADDRESS_LEN_3:
653 case SMPT_CMD_ADDRESS_LEN_4:
655 case SMPT_CMD_ADDRESS_LEN_USE_CURRENT:
657 return nor->params->addr_mode_nbytes;
662 * spi_nor_smpt_read_dummy() - return the configuration detection command read
663 * latency, in clock cycles.
664 * @nor: pointer to a 'struct spi_nor'
665 * @settings: configuration detection command descriptor, dword1
667 * Return: the number of dummy cycles for an SMPT read
669 static u8 spi_nor_smpt_read_dummy(const struct spi_nor *nor, const u32 settings)
671 u8 read_dummy = SMPT_CMD_READ_DUMMY(settings);
673 if (read_dummy == SMPT_CMD_READ_DUMMY_IS_VARIABLE)
674 return nor->read_dummy;
679 * spi_nor_get_map_in_use() - get the configuration map in use
680 * @nor: pointer to a 'struct spi_nor'
681 * @smpt: pointer to the sector map parameter table
682 * @smpt_len: sector map parameter table length
684 * Return: pointer to the map in use, ERR_PTR(-errno) otherwise.
686 static const u32 *spi_nor_get_map_in_use(struct spi_nor *nor, const u32 *smpt,
694 u8 addr_nbytes, read_opcode, read_dummy;
695 u8 read_data_mask, map_id;
697 /* Use a kmalloc'ed bounce buffer to guarantee it is DMA-able. */
698 buf = kmalloc(sizeof(*buf), GFP_KERNEL);
700 return ERR_PTR(-ENOMEM);
702 addr_nbytes = nor->addr_nbytes;
703 read_dummy = nor->read_dummy;
704 read_opcode = nor->read_opcode;
707 /* Determine if there are any optional Detection Command Descriptors */
708 for (i = 0; i < smpt_len; i += 2) {
709 if (smpt[i] & SMPT_DESC_TYPE_MAP)
712 read_data_mask = SMPT_CMD_READ_DATA(smpt[i]);
713 nor->addr_nbytes = spi_nor_smpt_addr_nbytes(nor, smpt[i]);
714 nor->read_dummy = spi_nor_smpt_read_dummy(nor, smpt[i]);
715 nor->read_opcode = SMPT_CMD_OPCODE(smpt[i]);
718 err = spi_nor_read_raw(nor, addr, 1, buf);
725 * Build an index value that is used to select the Sector Map
726 * Configuration that is currently in use.
728 map_id = map_id << 1 | !!(*buf & read_data_mask);
732 * If command descriptors are provided, they always precede map
733 * descriptors in the table. There is no need to start the iteration
734 * over smpt array all over again.
736 * Find the matching configuration map.
738 ret = ERR_PTR(-EINVAL);
739 while (i < smpt_len) {
740 if (SMPT_MAP_ID(smpt[i]) == map_id) {
746 * If there are no more configuration map descriptors and no
747 * configuration ID matched the configuration identifier, the
748 * sector address map is unknown.
750 if (smpt[i] & SMPT_DESC_END)
753 /* increment the table index to the next map */
754 i += SMPT_MAP_REGION_COUNT(smpt[i]) + 1;
760 nor->addr_nbytes = addr_nbytes;
761 nor->read_dummy = read_dummy;
762 nor->read_opcode = read_opcode;
766 static void spi_nor_region_mark_end(struct spi_nor_erase_region *region)
768 region->offset |= SNOR_LAST_REGION;
771 static void spi_nor_region_mark_overlay(struct spi_nor_erase_region *region)
773 region->offset |= SNOR_OVERLAID_REGION;
777 * spi_nor_region_check_overlay() - set overlay bit when the region is overlaid
778 * @region: pointer to a structure that describes a SPI NOR erase region
779 * @erase: pointer to a structure that describes a SPI NOR erase type
780 * @erase_type: erase type bitmask
783 spi_nor_region_check_overlay(struct spi_nor_erase_region *region,
784 const struct spi_nor_erase_type *erase,
789 for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
790 if (!(erase[i].size && erase_type & BIT(erase[i].idx)))
792 if (region->size & erase[i].size_mask) {
793 spi_nor_region_mark_overlay(region);
800 * spi_nor_init_non_uniform_erase_map() - initialize the non-uniform erase map
801 * @nor: pointer to a 'struct spi_nor'
802 * @smpt: pointer to the sector map parameter table
804 * Return: 0 on success, -errno otherwise.
806 static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor,
809 struct spi_nor_erase_map *map = &nor->params->erase_map;
810 struct spi_nor_erase_type *erase = map->erase_type;
811 struct spi_nor_erase_region *region;
815 u8 uniform_erase_type, save_uniform_erase_type;
816 u8 erase_type, regions_erase_type;
818 region_count = SMPT_MAP_REGION_COUNT(*smpt);
820 * The regions will be freed when the driver detaches from the
823 region = devm_kcalloc(nor->dev, region_count, sizeof(*region),
827 map->regions = region;
829 uniform_erase_type = 0xff;
830 regions_erase_type = 0;
832 /* Populate regions. */
833 for (i = 0; i < region_count; i++) {
834 j = i + 1; /* index for the region dword */
835 region[i].size = SMPT_MAP_REGION_SIZE(smpt[j]);
836 erase_type = SMPT_MAP_REGION_ERASE_TYPE(smpt[j]);
837 region[i].offset = offset | erase_type;
839 spi_nor_region_check_overlay(®ion[i], erase, erase_type);
842 * Save the erase types that are supported in all regions and
843 * can erase the entire flash memory.
845 uniform_erase_type &= erase_type;
848 * regions_erase_type mask will indicate all the erase types
849 * supported in this configuration map.
851 regions_erase_type |= erase_type;
853 offset = (region[i].offset & ~SNOR_ERASE_FLAGS_MASK) +
856 spi_nor_region_mark_end(®ion[i - 1]);
858 save_uniform_erase_type = map->uniform_erase_type;
859 map->uniform_erase_type = spi_nor_sort_erase_mask(map,
862 if (!regions_erase_type) {
864 * Roll back to the previous uniform_erase_type mask, SMPT is
867 map->uniform_erase_type = save_uniform_erase_type;
872 * BFPT advertises all the erase types supported by all the possible
873 * map configurations. Mask out the erase types that are not supported
874 * by the current map configuration.
876 for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++)
877 if (!(regions_erase_type & BIT(erase[i].idx)))
878 spi_nor_set_erase_type(&erase[i], 0, 0xFF);
884 * spi_nor_parse_smpt() - parse Sector Map Parameter Table
885 * @nor: pointer to a 'struct spi_nor'
886 * @smpt_header: sector map parameter table header
888 * This table is optional, but when available, we parse it to identify the
889 * location and size of sectors within the main data array of the flash memory
890 * device and to identify which Erase Types are supported by each sector.
892 * Return: 0 on success, -errno otherwise.
894 static int spi_nor_parse_smpt(struct spi_nor *nor,
895 const struct sfdp_parameter_header *smpt_header)
897 const u32 *sector_map;
903 /* Read the Sector Map Parameter Table. */
904 len = smpt_header->length * sizeof(*smpt);
905 smpt = kmalloc(len, GFP_KERNEL);
909 addr = SFDP_PARAM_HEADER_PTP(smpt_header);
910 ret = spi_nor_read_sfdp(nor, addr, len, smpt);
914 /* Fix endianness of the SMPT DWORDs. */
915 le32_to_cpu_array(smpt, smpt_header->length);
917 sector_map = spi_nor_get_map_in_use(nor, smpt, smpt_header->length);
918 if (IS_ERR(sector_map)) {
919 ret = PTR_ERR(sector_map);
923 ret = spi_nor_init_non_uniform_erase_map(nor, sector_map);
927 spi_nor_regions_sort_erase_types(&nor->params->erase_map);
935 * spi_nor_parse_4bait() - parse the 4-Byte Address Instruction Table
936 * @nor: pointer to a 'struct spi_nor'.
937 * @param_header: pointer to the 'struct sfdp_parameter_header' describing
938 * the 4-Byte Address Instruction Table length and version.
940 * Return: 0 on success, -errno otherwise.
942 static int spi_nor_parse_4bait(struct spi_nor *nor,
943 const struct sfdp_parameter_header *param_header)
945 static const struct sfdp_4bait reads[] = {
946 { SNOR_HWCAPS_READ, BIT(0) },
947 { SNOR_HWCAPS_READ_FAST, BIT(1) },
948 { SNOR_HWCAPS_READ_1_1_2, BIT(2) },
949 { SNOR_HWCAPS_READ_1_2_2, BIT(3) },
950 { SNOR_HWCAPS_READ_1_1_4, BIT(4) },
951 { SNOR_HWCAPS_READ_1_4_4, BIT(5) },
952 { SNOR_HWCAPS_READ_1_1_1_DTR, BIT(13) },
953 { SNOR_HWCAPS_READ_1_2_2_DTR, BIT(14) },
954 { SNOR_HWCAPS_READ_1_4_4_DTR, BIT(15) },
956 static const struct sfdp_4bait programs[] = {
957 { SNOR_HWCAPS_PP, BIT(6) },
958 { SNOR_HWCAPS_PP_1_1_4, BIT(7) },
959 { SNOR_HWCAPS_PP_1_4_4, BIT(8) },
961 static const struct sfdp_4bait erases[SNOR_ERASE_TYPE_MAX] = {
962 { 0u /* not used */, BIT(9) },
963 { 0u /* not used */, BIT(10) },
964 { 0u /* not used */, BIT(11) },
965 { 0u /* not used */, BIT(12) },
967 struct spi_nor_flash_parameter *params = nor->params;
968 struct spi_nor_pp_command *params_pp = params->page_programs;
969 struct spi_nor_erase_map *map = ¶ms->erase_map;
970 struct spi_nor_erase_type *erase_type = map->erase_type;
973 u32 addr, discard_hwcaps, read_hwcaps, pp_hwcaps, erase_mask;
976 if (param_header->major != SFDP_JESD216_MAJOR ||
977 param_header->length < SFDP_4BAIT_DWORD_MAX)
980 /* Read the 4-byte Address Instruction Table. */
981 len = sizeof(*dwords) * SFDP_4BAIT_DWORD_MAX;
983 /* Use a kmalloc'ed bounce buffer to guarantee it is DMA-able. */
984 dwords = kmalloc(len, GFP_KERNEL);
988 addr = SFDP_PARAM_HEADER_PTP(param_header);
989 ret = spi_nor_read_sfdp(nor, addr, len, dwords);
993 /* Fix endianness of the 4BAIT DWORDs. */
994 le32_to_cpu_array(dwords, SFDP_4BAIT_DWORD_MAX);
997 * Compute the subset of (Fast) Read commands for which the 4-byte
998 * version is supported.
1002 for (i = 0; i < ARRAY_SIZE(reads); i++) {
1003 const struct sfdp_4bait *read = &reads[i];
1005 discard_hwcaps |= read->hwcaps;
1006 if ((params->hwcaps.mask & read->hwcaps) &&
1007 (dwords[0] & read->supported_bit))
1008 read_hwcaps |= read->hwcaps;
1012 * Compute the subset of Page Program commands for which the 4-byte
1013 * version is supported.
1016 for (i = 0; i < ARRAY_SIZE(programs); i++) {
1017 const struct sfdp_4bait *program = &programs[i];
1020 * The 4 Byte Address Instruction (Optional) Table is the only
1021 * SFDP table that indicates support for Page Program Commands.
1022 * Bypass the params->hwcaps.mask and consider 4BAIT the biggest
1023 * authority for specifying Page Program support.
1025 discard_hwcaps |= program->hwcaps;
1026 if (dwords[0] & program->supported_bit)
1027 pp_hwcaps |= program->hwcaps;
1031 * Compute the subset of Sector Erase commands for which the 4-byte
1032 * version is supported.
1035 for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
1036 const struct sfdp_4bait *erase = &erases[i];
1038 if (dwords[0] & erase->supported_bit)
1039 erase_mask |= BIT(i);
1042 /* Replicate the sort done for the map's erase types in BFPT. */
1043 erase_mask = spi_nor_sort_erase_mask(map, erase_mask);
1046 * We need at least one 4-byte op code per read, program and erase
1047 * operation; the .read(), .write() and .erase() hooks share the
1048 * nor->addr_nbytes value.
1050 if (!read_hwcaps || !pp_hwcaps || !erase_mask)
1054 * Discard all operations from the 4-byte instruction set which are
1055 * not supported by this memory.
1057 params->hwcaps.mask &= ~discard_hwcaps;
1058 params->hwcaps.mask |= (read_hwcaps | pp_hwcaps);
1060 /* Use the 4-byte address instruction set. */
1061 for (i = 0; i < SNOR_CMD_READ_MAX; i++) {
1062 struct spi_nor_read_command *read_cmd = ¶ms->reads[i];
1064 read_cmd->opcode = spi_nor_convert_3to4_read(read_cmd->opcode);
1067 /* 4BAIT is the only SFDP table that indicates page program support. */
1068 if (pp_hwcaps & SNOR_HWCAPS_PP) {
1069 spi_nor_set_pp_settings(¶ms_pp[SNOR_CMD_PP],
1070 SPINOR_OP_PP_4B, SNOR_PROTO_1_1_1);
1072 * Since xSPI Page Program opcode is backward compatible with
1073 * Legacy SPI, use Legacy SPI opcode there as well.
1075 spi_nor_set_pp_settings(¶ms_pp[SNOR_CMD_PP_8_8_8_DTR],
1076 SPINOR_OP_PP_4B, SNOR_PROTO_8_8_8_DTR);
1078 if (pp_hwcaps & SNOR_HWCAPS_PP_1_1_4)
1079 spi_nor_set_pp_settings(¶ms_pp[SNOR_CMD_PP_1_1_4],
1080 SPINOR_OP_PP_1_1_4_4B,
1082 if (pp_hwcaps & SNOR_HWCAPS_PP_1_4_4)
1083 spi_nor_set_pp_settings(¶ms_pp[SNOR_CMD_PP_1_4_4],
1084 SPINOR_OP_PP_1_4_4_4B,
1087 for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
1088 if (erase_mask & BIT(i))
1089 erase_type[i].opcode = (dwords[1] >>
1090 erase_type[i].idx * 8) & 0xFF;
1092 spi_nor_set_erase_type(&erase_type[i], 0u, 0xFF);
1096 * We set SNOR_F_HAS_4BAIT in order to skip spi_nor_set_4byte_opcodes()
1097 * later because we already did the conversion to 4byte opcodes. Also,
1098 * this latest function implements a legacy quirk for the erase size of
1099 * Spansion memory. However this quirk is no longer needed with new
1100 * SFDP compliant memories.
1102 params->addr_nbytes = 4;
1103 nor->flags |= SNOR_F_4B_OPCODES | SNOR_F_HAS_4BAIT;
1111 #define PROFILE1_DWORD1_RDSR_ADDR_BYTES BIT(29)
1112 #define PROFILE1_DWORD1_RDSR_DUMMY BIT(28)
1113 #define PROFILE1_DWORD1_RD_FAST_CMD GENMASK(15, 8)
1114 #define PROFILE1_DWORD4_DUMMY_200MHZ GENMASK(11, 7)
1115 #define PROFILE1_DWORD5_DUMMY_166MHZ GENMASK(31, 27)
1116 #define PROFILE1_DWORD5_DUMMY_133MHZ GENMASK(21, 17)
1117 #define PROFILE1_DWORD5_DUMMY_100MHZ GENMASK(11, 7)
1120 * spi_nor_parse_profile1() - parse the xSPI Profile 1.0 table
1121 * @nor: pointer to a 'struct spi_nor'
1122 * @profile1_header: pointer to the 'struct sfdp_parameter_header' describing
1123 * the Profile 1.0 Table length and version.
1125 * Return: 0 on success, -errno otherwise.
1127 static int spi_nor_parse_profile1(struct spi_nor *nor,
1128 const struct sfdp_parameter_header *profile1_header)
1135 len = profile1_header->length * sizeof(*dwords);
1136 dwords = kmalloc(len, GFP_KERNEL);
1140 addr = SFDP_PARAM_HEADER_PTP(profile1_header);
1141 ret = spi_nor_read_sfdp(nor, addr, len, dwords);
1145 le32_to_cpu_array(dwords, profile1_header->length);
1147 /* Get 8D-8D-8D fast read opcode and dummy cycles. */
1148 opcode = FIELD_GET(PROFILE1_DWORD1_RD_FAST_CMD, dwords[0]);
1150 /* Set the Read Status Register dummy cycles and dummy address bytes. */
1151 if (dwords[0] & PROFILE1_DWORD1_RDSR_DUMMY)
1152 nor->params->rdsr_dummy = 8;
1154 nor->params->rdsr_dummy = 4;
1156 if (dwords[0] & PROFILE1_DWORD1_RDSR_ADDR_BYTES)
1157 nor->params->rdsr_addr_nbytes = 4;
1159 nor->params->rdsr_addr_nbytes = 0;
1162 * We don't know what speed the controller is running at. Find the
1163 * dummy cycles for the fastest frequency the flash can run at to be
1164 * sure we are never short of dummy cycles. A value of 0 means the
1165 * frequency is not supported.
1167 * Default to PROFILE1_DUMMY_DEFAULT if we don't find anything, and let
1168 * flashes set the correct value if needed in their fixup hooks.
1170 dummy = FIELD_GET(PROFILE1_DWORD4_DUMMY_200MHZ, dwords[3]);
1172 dummy = FIELD_GET(PROFILE1_DWORD5_DUMMY_166MHZ, dwords[4]);
1174 dummy = FIELD_GET(PROFILE1_DWORD5_DUMMY_133MHZ, dwords[4]);
1176 dummy = FIELD_GET(PROFILE1_DWORD5_DUMMY_100MHZ, dwords[4]);
1179 "Can't find dummy cycles from Profile 1.0 table\n");
1181 /* Round up to an even value to avoid tripping controllers up. */
1182 dummy = round_up(dummy, 2);
1184 /* Update the fast read settings. */
1185 nor->params->hwcaps.mask |= SNOR_HWCAPS_READ_8_8_8_DTR;
1186 spi_nor_set_read_settings(&nor->params->reads[SNOR_CMD_READ_8_8_8_DTR],
1188 SNOR_PROTO_8_8_8_DTR);
1191 * Page Program is "Required Command" in the xSPI Profile 1.0. Update
1192 * the params->hwcaps.mask here.
1194 nor->params->hwcaps.mask |= SNOR_HWCAPS_PP_8_8_8_DTR;
1201 #define SCCR_DWORD22_OCTAL_DTR_EN_VOLATILE BIT(31)
1204 * spi_nor_parse_sccr() - Parse the Status, Control and Configuration Register
1206 * @nor: pointer to a 'struct spi_nor'
1207 * @sccr_header: pointer to the 'struct sfdp_parameter_header' describing
1208 * the SCCR Map table length and version.
1210 * Return: 0 on success, -errno otherwise.
1212 static int spi_nor_parse_sccr(struct spi_nor *nor,
1213 const struct sfdp_parameter_header *sccr_header)
1219 len = sccr_header->length * sizeof(*dwords);
1220 dwords = kmalloc(len, GFP_KERNEL);
1224 addr = SFDP_PARAM_HEADER_PTP(sccr_header);
1225 ret = spi_nor_read_sfdp(nor, addr, len, dwords);
1229 le32_to_cpu_array(dwords, sccr_header->length);
1231 if (FIELD_GET(SCCR_DWORD22_OCTAL_DTR_EN_VOLATILE, dwords[22]))
1232 nor->flags |= SNOR_F_IO_MODE_EN_VOLATILE;
1240 * spi_nor_post_sfdp_fixups() - Updates the flash's parameters and settings
1241 * after SFDP has been parsed. Called only for flashes that define JESD216 SFDP
1243 * @nor: pointer to a 'struct spi_nor'
1245 * Used to tweak various flash parameters when information provided by the SFDP
1248 static void spi_nor_post_sfdp_fixups(struct spi_nor *nor)
1250 if (nor->manufacturer && nor->manufacturer->fixups &&
1251 nor->manufacturer->fixups->post_sfdp)
1252 nor->manufacturer->fixups->post_sfdp(nor);
1254 if (nor->info->fixups && nor->info->fixups->post_sfdp)
1255 nor->info->fixups->post_sfdp(nor);
1259 * spi_nor_check_sfdp_signature() - check for a valid SFDP signature
1260 * @nor: pointer to a 'struct spi_nor'
1262 * Used to detect if the flash supports the RDSFDP command as well as the
1263 * presence of a valid SFDP table.
1265 * Return: 0 on success, -errno otherwise.
1267 int spi_nor_check_sfdp_signature(struct spi_nor *nor)
1272 /* Get the SFDP header. */
1273 err = spi_nor_read_sfdp_dma_unsafe(nor, 0, sizeof(signature),
1278 /* Check the SFDP signature. */
1279 if (le32_to_cpu(signature) != SFDP_SIGNATURE)
1286 * spi_nor_parse_sfdp() - parse the Serial Flash Discoverable Parameters.
1287 * @nor: pointer to a 'struct spi_nor'
1289 * The Serial Flash Discoverable Parameters are described by the JEDEC JESD216
1290 * specification. This is a standard which tends to supported by almost all
1291 * (Q)SPI memory manufacturers. Those hard-coded tables allow us to learn at
1292 * runtime the main parameters needed to perform basic SPI flash operations such
1293 * as Fast Read, Page Program or Sector Erase commands.
1295 * Return: 0 on success, -errno otherwise.
1297 int spi_nor_parse_sfdp(struct spi_nor *nor)
1299 const struct sfdp_parameter_header *param_header, *bfpt_header;
1300 struct sfdp_parameter_header *param_headers = NULL;
1301 struct sfdp_header header;
1302 struct device *dev = nor->dev;
1308 /* Get the SFDP header. */
1309 err = spi_nor_read_sfdp_dma_unsafe(nor, 0, sizeof(header), &header);
1313 /* Check the SFDP header version. */
1314 if (le32_to_cpu(header.signature) != SFDP_SIGNATURE ||
1315 header.major != SFDP_JESD216_MAJOR)
1319 * Verify that the first and only mandatory parameter header is a
1320 * Basic Flash Parameter Table header as specified in JESD216.
1322 bfpt_header = &header.bfpt_header;
1323 if (SFDP_PARAM_HEADER_ID(bfpt_header) != SFDP_BFPT_ID ||
1324 bfpt_header->major != SFDP_JESD216_MAJOR)
1327 sfdp_size = SFDP_PARAM_HEADER_PTP(bfpt_header) +
1328 SFDP_PARAM_HEADER_PARAM_LEN(bfpt_header);
1331 * Allocate memory then read all parameter headers with a single
1332 * Read SFDP command. These parameter headers will actually be parsed
1333 * twice: a first time to get the latest revision of the basic flash
1334 * parameter table, then a second time to handle the supported optional
1336 * Hence we read the parameter headers once for all to reduce the
1337 * processing time. Also we use kmalloc() instead of devm_kmalloc()
1338 * because we don't need to keep these parameter headers: the allocated
1339 * memory is always released with kfree() before exiting this function.
1342 psize = header.nph * sizeof(*param_headers);
1344 param_headers = kmalloc(psize, GFP_KERNEL);
1348 err = spi_nor_read_sfdp(nor, sizeof(header),
1349 psize, param_headers);
1351 dev_dbg(dev, "failed to read SFDP parameter headers\n");
1357 * Cache the complete SFDP data. It is not (easily) possible to fetch
1358 * SFDP after probe time and we need it for the sysfs access.
1360 for (i = 0; i < header.nph; i++) {
1361 param_header = ¶m_headers[i];
1362 sfdp_size = max_t(size_t, sfdp_size,
1363 SFDP_PARAM_HEADER_PTP(param_header) +
1364 SFDP_PARAM_HEADER_PARAM_LEN(param_header));
1368 * Limit the total size to a reasonable value to avoid allocating too
1369 * much memory just of because the flash returned some insane values.
1371 if (sfdp_size > PAGE_SIZE) {
1372 dev_dbg(dev, "SFDP data (%zu) too big, truncating\n",
1374 sfdp_size = PAGE_SIZE;
1377 sfdp = devm_kzalloc(dev, sizeof(*sfdp), GFP_KERNEL);
1384 * The SFDP is organized in chunks of DWORDs. Thus, in theory, the
1385 * sfdp_size should be a multiple of DWORDs. But in case a flash
1386 * is not spec compliant, make sure that we have enough space to store
1387 * the complete SFDP data.
1389 sfdp->num_dwords = DIV_ROUND_UP(sfdp_size, sizeof(*sfdp->dwords));
1390 sfdp->dwords = devm_kcalloc(dev, sfdp->num_dwords,
1391 sizeof(*sfdp->dwords), GFP_KERNEL);
1392 if (!sfdp->dwords) {
1394 devm_kfree(dev, sfdp);
1398 err = spi_nor_read_sfdp(nor, 0, sfdp_size, sfdp->dwords);
1400 dev_dbg(dev, "failed to read SFDP data\n");
1401 devm_kfree(dev, sfdp->dwords);
1402 devm_kfree(dev, sfdp);
1409 * Check other parameter headers to get the latest revision of
1410 * the basic flash parameter table.
1412 for (i = 0; i < header.nph; i++) {
1413 param_header = ¶m_headers[i];
1415 if (SFDP_PARAM_HEADER_ID(param_header) == SFDP_BFPT_ID &&
1416 param_header->major == SFDP_JESD216_MAJOR &&
1417 (param_header->minor > bfpt_header->minor ||
1418 (param_header->minor == bfpt_header->minor &&
1419 param_header->length > bfpt_header->length)))
1420 bfpt_header = param_header;
1423 err = spi_nor_parse_bfpt(nor, bfpt_header);
1427 /* Parse optional parameter tables. */
1428 for (i = 0; i < header.nph; i++) {
1429 param_header = ¶m_headers[i];
1431 switch (SFDP_PARAM_HEADER_ID(param_header)) {
1432 case SFDP_SECTOR_MAP_ID:
1433 err = spi_nor_parse_smpt(nor, param_header);
1437 err = spi_nor_parse_4bait(nor, param_header);
1440 case SFDP_PROFILE1_ID:
1441 err = spi_nor_parse_profile1(nor, param_header);
1444 case SFDP_SCCR_MAP_ID:
1445 err = spi_nor_parse_sccr(nor, param_header);
1453 dev_warn(dev, "Failed to parse optional parameter table: %04x\n",
1454 SFDP_PARAM_HEADER_ID(param_header));
1456 * Let's not drop all information we extracted so far
1457 * if optional table parsers fail. In case of failing,
1458 * each optional parser is responsible to roll back to
1459 * the previously known spi_nor data.
1465 spi_nor_post_sfdp_fixups(nor);
1467 kfree(param_headers);