1 // SPDX-License-Identifier: GPL-2.0
3 * Based on m25p80.c, by Mike Lavender (mike@steroidmicros.com), with
4 * influence from lart.c (Abraham Van Der Merwe) and mtd_dataflash.c
6 * Copyright (C) 2005, Intec Automation Inc.
7 * Copyright (C) 2014, Freescale Semiconductor, Inc.
9 * Synced from Linux v4.19
13 #include <linux/err.h>
14 #include <linux/errno.h>
15 #include <linux/log2.h>
16 #include <linux/math64.h>
17 #include <linux/sizes.h>
19 #include <linux/mtd/mtd.h>
20 #include <linux/mtd/spi-nor.h>
24 #include "sf_internal.h"
26 /* Define max times to check status register before we give up. */
29 * For everything but full-chip erase; probably could be much smaller, but kept
30 * around for safety for now
33 #define HZ CONFIG_SYS_HZ
35 #define DEFAULT_READY_WAIT_JIFFIES (40UL * HZ)
37 static int spi_nor_read_write_reg(struct spi_nor *nor, struct spi_mem_op
40 if (op->data.dir == SPI_MEM_DATA_IN)
41 op->data.buf.in = buf;
43 op->data.buf.out = buf;
44 return spi_mem_exec_op(nor->spi, op);
47 static int spi_nor_read_reg(struct spi_nor *nor, u8 code, u8 *val, int len)
49 struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(code, 1),
52 SPI_MEM_OP_DATA_IN(len, NULL, 1));
55 ret = spi_nor_read_write_reg(nor, &op, val);
57 dev_dbg(&flash->spimem->spi->dev, "error %d reading %x\n", ret,
63 static int spi_nor_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
65 struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(opcode, 1),
68 SPI_MEM_OP_DATA_OUT(len, NULL, 1));
70 return spi_nor_read_write_reg(nor, &op, buf);
73 static ssize_t spi_nor_read_data(struct spi_nor *nor, loff_t from, size_t len,
76 struct spi_mem_op op =
77 SPI_MEM_OP(SPI_MEM_OP_CMD(nor->read_opcode, 1),
78 SPI_MEM_OP_ADDR(nor->addr_width, from, 1),
79 SPI_MEM_OP_DUMMY(nor->read_dummy, 1),
80 SPI_MEM_OP_DATA_IN(len, buf, 1));
81 size_t remaining = len;
84 /* get transfer protocols. */
85 op.cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->read_proto);
86 op.addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->read_proto);
87 op.dummy.buswidth = op.addr.buswidth;
88 op.data.buswidth = spi_nor_get_protocol_data_nbits(nor->read_proto);
90 /* convert the dummy cycles to the number of bytes */
91 op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8;
94 op.data.nbytes = remaining < UINT_MAX ? remaining : UINT_MAX;
95 ret = spi_mem_adjust_op_size(nor->spi, &op);
99 ret = spi_mem_exec_op(nor->spi, &op);
103 op.addr.val += op.data.nbytes;
104 remaining -= op.data.nbytes;
105 op.data.buf.in += op.data.nbytes;
111 static ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len,
114 struct spi_mem_op op =
115 SPI_MEM_OP(SPI_MEM_OP_CMD(nor->program_opcode, 1),
116 SPI_MEM_OP_ADDR(nor->addr_width, to, 1),
118 SPI_MEM_OP_DATA_OUT(len, buf, 1));
119 size_t remaining = len;
122 /* get transfer protocols. */
123 op.cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->write_proto);
124 op.addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->write_proto);
125 op.data.buswidth = spi_nor_get_protocol_data_nbits(nor->write_proto);
127 if (nor->program_opcode == SPINOR_OP_AAI_WP && nor->sst_write_second)
131 op.data.nbytes = remaining < UINT_MAX ? remaining : UINT_MAX;
132 ret = spi_mem_adjust_op_size(nor->spi, &op);
136 ret = spi_mem_exec_op(nor->spi, &op);
140 op.addr.val += op.data.nbytes;
141 remaining -= op.data.nbytes;
142 op.data.buf.out += op.data.nbytes;
149 * Read the status register, returning its value in the location
150 * Return the status register value.
151 * Returns negative if error occurred.
153 static int read_sr(struct spi_nor *nor)
158 ret = nor->read_reg(nor, SPINOR_OP_RDSR, &val, 1);
160 pr_debug("error %d reading SR\n", (int)ret);
168 * Read the flag status register, returning its value in the location
169 * Return the status register value.
170 * Returns negative if error occurred.
172 static int read_fsr(struct spi_nor *nor)
177 ret = nor->read_reg(nor, SPINOR_OP_RDFSR, &val, 1);
179 pr_debug("error %d reading FSR\n", ret);
187 * Read configuration register, returning its value in the
188 * location. Return the configuration register value.
189 * Returns negative if error occurred.
191 #if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
192 static int read_cr(struct spi_nor *nor)
197 ret = nor->read_reg(nor, SPINOR_OP_RDCR, &val, 1);
199 dev_dbg(nor->dev, "error %d reading CR\n", ret);
208 * Write status register 1 byte
209 * Returns negative if error occurred.
211 static int write_sr(struct spi_nor *nor, u8 val)
213 nor->cmd_buf[0] = val;
214 return nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1);
218 * Set write enable latch with Write Enable command.
219 * Returns negative if error occurred.
221 static int write_enable(struct spi_nor *nor)
223 return nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0);
227 * Send write disable instruction to the chip.
229 static int write_disable(struct spi_nor *nor)
231 return nor->write_reg(nor, SPINOR_OP_WRDI, NULL, 0);
234 static struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
239 #ifndef CONFIG_SPI_FLASH_BAR
240 static u8 spi_nor_convert_opcode(u8 opcode, const u8 table[][2], size_t size)
244 for (i = 0; i < size; i++)
245 if (table[i][0] == opcode)
248 /* No conversion found, keep input op code. */
252 static u8 spi_nor_convert_3to4_read(u8 opcode)
254 static const u8 spi_nor_3to4_read[][2] = {
255 { SPINOR_OP_READ, SPINOR_OP_READ_4B },
256 { SPINOR_OP_READ_FAST, SPINOR_OP_READ_FAST_4B },
257 { SPINOR_OP_READ_1_1_2, SPINOR_OP_READ_1_1_2_4B },
258 { SPINOR_OP_READ_1_2_2, SPINOR_OP_READ_1_2_2_4B },
259 { SPINOR_OP_READ_1_1_4, SPINOR_OP_READ_1_1_4_4B },
260 { SPINOR_OP_READ_1_4_4, SPINOR_OP_READ_1_4_4_4B },
262 { SPINOR_OP_READ_1_1_1_DTR, SPINOR_OP_READ_1_1_1_DTR_4B },
263 { SPINOR_OP_READ_1_2_2_DTR, SPINOR_OP_READ_1_2_2_DTR_4B },
264 { SPINOR_OP_READ_1_4_4_DTR, SPINOR_OP_READ_1_4_4_DTR_4B },
267 return spi_nor_convert_opcode(opcode, spi_nor_3to4_read,
268 ARRAY_SIZE(spi_nor_3to4_read));
271 static u8 spi_nor_convert_3to4_program(u8 opcode)
273 static const u8 spi_nor_3to4_program[][2] = {
274 { SPINOR_OP_PP, SPINOR_OP_PP_4B },
275 { SPINOR_OP_PP_1_1_4, SPINOR_OP_PP_1_1_4_4B },
276 { SPINOR_OP_PP_1_4_4, SPINOR_OP_PP_1_4_4_4B },
279 return spi_nor_convert_opcode(opcode, spi_nor_3to4_program,
280 ARRAY_SIZE(spi_nor_3to4_program));
283 static u8 spi_nor_convert_3to4_erase(u8 opcode)
285 static const u8 spi_nor_3to4_erase[][2] = {
286 { SPINOR_OP_BE_4K, SPINOR_OP_BE_4K_4B },
287 { SPINOR_OP_BE_32K, SPINOR_OP_BE_32K_4B },
288 { SPINOR_OP_SE, SPINOR_OP_SE_4B },
291 return spi_nor_convert_opcode(opcode, spi_nor_3to4_erase,
292 ARRAY_SIZE(spi_nor_3to4_erase));
295 static void spi_nor_set_4byte_opcodes(struct spi_nor *nor,
296 const struct flash_info *info)
298 /* Do some manufacturer fixups first */
299 switch (JEDEC_MFR(info)) {
300 case SNOR_MFR_SPANSION:
301 /* No small sector erase for 4-byte command set */
302 nor->erase_opcode = SPINOR_OP_SE;
303 nor->mtd.erasesize = info->sector_size;
310 nor->read_opcode = spi_nor_convert_3to4_read(nor->read_opcode);
311 nor->program_opcode = spi_nor_convert_3to4_program(nor->program_opcode);
312 nor->erase_opcode = spi_nor_convert_3to4_erase(nor->erase_opcode);
314 #endif /* !CONFIG_SPI_FLASH_BAR */
316 /* Enable/disable 4-byte addressing mode. */
317 static int set_4byte(struct spi_nor *nor, const struct flash_info *info,
321 bool need_wren = false;
324 switch (JEDEC_MFR(info)) {
326 case SNOR_MFR_MICRON:
327 /* Some Micron need WREN command; all will accept it */
329 case SNOR_MFR_MACRONIX:
330 case SNOR_MFR_WINBOND:
334 cmd = enable ? SPINOR_OP_EN4B : SPINOR_OP_EX4B;
335 status = nor->write_reg(nor, cmd, NULL, 0);
339 if (!status && !enable &&
340 JEDEC_MFR(info) == SNOR_MFR_WINBOND) {
342 * On Winbond W25Q256FV, leaving 4byte mode causes
343 * the Extended Address Register to be set to 1, so all
344 * 3-byte-address reads come from the second 16M.
345 * We must clear the register to enable normal behavior.
349 nor->write_reg(nor, SPINOR_OP_WREAR, nor->cmd_buf, 1);
356 nor->cmd_buf[0] = enable << 7;
357 return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1);
361 static int spi_nor_sr_ready(struct spi_nor *nor)
363 int sr = read_sr(nor);
368 if (nor->flags & SNOR_F_USE_CLSR && sr & (SR_E_ERR | SR_P_ERR)) {
370 dev_dbg(nor->dev, "Erase Error occurred\n");
372 dev_dbg(nor->dev, "Programming Error occurred\n");
374 nor->write_reg(nor, SPINOR_OP_CLSR, NULL, 0);
378 return !(sr & SR_WIP);
381 static int spi_nor_fsr_ready(struct spi_nor *nor)
383 int fsr = read_fsr(nor);
388 if (fsr & (FSR_E_ERR | FSR_P_ERR)) {
390 dev_dbg(nor->dev, "Erase operation failed.\n");
392 dev_dbg(nor->dev, "Program operation failed.\n");
394 if (fsr & FSR_PT_ERR)
396 "Attempted to modify a protected sector.\n");
398 nor->write_reg(nor, SPINOR_OP_CLFSR, NULL, 0);
402 return fsr & FSR_READY;
405 static int spi_nor_ready(struct spi_nor *nor)
409 sr = spi_nor_sr_ready(nor);
412 fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
419 * Service routine to read status register until ready, or timeout occurs.
420 * Returns non-zero if error.
422 static int spi_nor_wait_till_ready_with_timeout(struct spi_nor *nor,
423 unsigned long timeout)
425 unsigned long timebase;
428 timebase = get_timer(0);
430 while (get_timer(timebase) < timeout) {
431 ret = spi_nor_ready(nor);
438 dev_err(nor->dev, "flash operation timed out\n");
443 static int spi_nor_wait_till_ready(struct spi_nor *nor)
445 return spi_nor_wait_till_ready_with_timeout(nor,
446 DEFAULT_READY_WAIT_JIFFIES);
449 #ifdef CONFIG_SPI_FLASH_BAR
451 * This "clean_bar" is necessary in a situation when one was accessing
452 * spi flash memory > 16 MiB by using Bank Address Register's BA24 bit.
454 * After it the BA24 bit shall be cleared to allow access to correct
455 * memory region after SW reset (by calling "reset" command).
457 * Otherwise, the BA24 bit may be left set and then after reset, the
458 * ROM would read/write/erase SPL from 16 MiB * bank_sel address.
460 static int clean_bar(struct spi_nor *nor)
462 u8 cmd, bank_sel = 0;
464 if (nor->bank_curr == 0)
466 cmd = nor->bank_write_cmd;
470 return nor->write_reg(nor, cmd, &bank_sel, 1);
473 static int write_bar(struct spi_nor *nor, u32 offset)
478 bank_sel = offset / SZ_16M;
479 if (bank_sel == nor->bank_curr)
482 cmd = nor->bank_write_cmd;
484 ret = nor->write_reg(nor, cmd, &bank_sel, 1);
486 debug("SF: fail to write bank register\n");
491 nor->bank_curr = bank_sel;
492 return nor->bank_curr;
495 static int read_bar(struct spi_nor *nor, const struct flash_info *info)
500 switch (JEDEC_MFR(info)) {
501 case SNOR_MFR_SPANSION:
502 nor->bank_read_cmd = SPINOR_OP_BRRD;
503 nor->bank_write_cmd = SPINOR_OP_BRWR;
506 nor->bank_read_cmd = SPINOR_OP_RDEAR;
507 nor->bank_write_cmd = SPINOR_OP_WREAR;
510 ret = nor->read_reg(nor, nor->bank_read_cmd,
513 debug("SF: fail to read bank addr register\n");
516 nor->bank_curr = curr_bank;
523 * Initiate the erasure of a single sector
525 static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
527 u8 buf[SPI_NOR_MAX_ADDR_WIDTH];
531 return nor->erase(nor, addr);
534 * Default implementation, if driver doesn't have a specialized HW
537 for (i = nor->addr_width - 1; i >= 0; i--) {
538 buf[i] = addr & 0xff;
542 return nor->write_reg(nor, nor->erase_opcode, buf, nor->addr_width);
546 * Erase an address range on the nor chip. The address range may extend
547 * one or more erase sectors. Return an error is there is a problem erasing.
549 static int spi_nor_erase(struct mtd_info *mtd, struct erase_info *instr)
551 struct spi_nor *nor = mtd_to_spi_nor(mtd);
555 dev_dbg(nor->dev, "at 0x%llx, len %lld\n", (long long)instr->addr,
556 (long long)instr->len);
558 div_u64_rem(instr->len, mtd->erasesize, &rem);
566 #ifdef CONFIG_SPI_FLASH_BAR
567 ret = write_bar(nor, addr);
573 ret = spi_nor_erase_sector(nor, addr);
577 addr += mtd->erasesize;
578 len -= mtd->erasesize;
580 ret = spi_nor_wait_till_ready(nor);
586 #ifdef CONFIG_SPI_FLASH_BAR
587 ret = clean_bar(nor);
594 #if defined(CONFIG_SPI_FLASH_STMICRO) || defined(CONFIG_SPI_FLASH_SST)
595 /* Write status register and ensure bits in mask match written values */
596 static int write_sr_and_check(struct spi_nor *nor, u8 status_new, u8 mask)
601 ret = write_sr(nor, status_new);
605 ret = spi_nor_wait_till_ready(nor);
613 return ((ret & mask) != (status_new & mask)) ? -EIO : 0;
616 static void stm_get_locked_range(struct spi_nor *nor, u8 sr, loff_t *ofs,
619 struct mtd_info *mtd = &nor->mtd;
620 u8 mask = SR_BP2 | SR_BP1 | SR_BP0;
621 int shift = ffs(mask) - 1;
629 pow = ((sr & mask) ^ mask) >> shift;
630 *len = mtd->size >> pow;
631 if (nor->flags & SNOR_F_HAS_SR_TB && sr & SR_TB)
634 *ofs = mtd->size - *len;
639 * Return 1 if the entire region is locked (if @locked is true) or unlocked (if
640 * @locked is false); 0 otherwise
642 static int stm_check_lock_status_sr(struct spi_nor *nor, loff_t ofs, u64 len,
651 stm_get_locked_range(nor, sr, &lock_offs, &lock_len);
654 /* Requested range is a sub-range of locked range */
655 return (ofs + len <= lock_offs + lock_len) && (ofs >= lock_offs);
657 /* Requested range does not overlap with locked range */
658 return (ofs >= lock_offs + lock_len) || (ofs + len <= lock_offs);
661 static int stm_is_locked_sr(struct spi_nor *nor, loff_t ofs, uint64_t len,
664 return stm_check_lock_status_sr(nor, ofs, len, sr, true);
667 static int stm_is_unlocked_sr(struct spi_nor *nor, loff_t ofs, uint64_t len,
670 return stm_check_lock_status_sr(nor, ofs, len, sr, false);
674 * Lock a region of the flash. Compatible with ST Micro and similar flash.
675 * Supports the block protection bits BP{0,1,2} in the status register
676 * (SR). Does not support these features found in newer SR bitfields:
677 * - SEC: sector/block protect - only handle SEC=0 (block protect)
678 * - CMP: complement protect - only support CMP=0 (range is not complemented)
680 * Support for the following is provided conditionally for some flash:
681 * - TB: top/bottom protect
683 * Sample table portion for 8MB flash (Winbond w25q64fw):
685 * SEC | TB | BP2 | BP1 | BP0 | Prot Length | Protected Portion
686 * --------------------------------------------------------------------------
687 * X | X | 0 | 0 | 0 | NONE | NONE
688 * 0 | 0 | 0 | 0 | 1 | 128 KB | Upper 1/64
689 * 0 | 0 | 0 | 1 | 0 | 256 KB | Upper 1/32
690 * 0 | 0 | 0 | 1 | 1 | 512 KB | Upper 1/16
691 * 0 | 0 | 1 | 0 | 0 | 1 MB | Upper 1/8
692 * 0 | 0 | 1 | 0 | 1 | 2 MB | Upper 1/4
693 * 0 | 0 | 1 | 1 | 0 | 4 MB | Upper 1/2
694 * X | X | 1 | 1 | 1 | 8 MB | ALL
695 * ------|-------|-------|-------|-------|---------------|-------------------
696 * 0 | 1 | 0 | 0 | 1 | 128 KB | Lower 1/64
697 * 0 | 1 | 0 | 1 | 0 | 256 KB | Lower 1/32
698 * 0 | 1 | 0 | 1 | 1 | 512 KB | Lower 1/16
699 * 0 | 1 | 1 | 0 | 0 | 1 MB | Lower 1/8
700 * 0 | 1 | 1 | 0 | 1 | 2 MB | Lower 1/4
701 * 0 | 1 | 1 | 1 | 0 | 4 MB | Lower 1/2
703 * Returns negative on errors, 0 on success.
705 static int stm_lock(struct spi_nor *nor, loff_t ofs, uint64_t len)
707 struct mtd_info *mtd = &nor->mtd;
708 int status_old, status_new;
709 u8 mask = SR_BP2 | SR_BP1 | SR_BP0;
710 u8 shift = ffs(mask) - 1, pow, val;
712 bool can_be_top = true, can_be_bottom = nor->flags & SNOR_F_HAS_SR_TB;
715 status_old = read_sr(nor);
719 /* If nothing in our range is unlocked, we don't need to do anything */
720 if (stm_is_locked_sr(nor, ofs, len, status_old))
723 /* If anything below us is unlocked, we can't use 'bottom' protection */
724 if (!stm_is_locked_sr(nor, 0, ofs, status_old))
725 can_be_bottom = false;
727 /* If anything above us is unlocked, we can't use 'top' protection */
728 if (!stm_is_locked_sr(nor, ofs + len, mtd->size - (ofs + len),
732 if (!can_be_bottom && !can_be_top)
735 /* Prefer top, if both are valid */
736 use_top = can_be_top;
738 /* lock_len: length of region that should end up locked */
740 lock_len = mtd->size - ofs;
742 lock_len = ofs + len;
745 * Need smallest pow such that:
747 * 1 / (2^pow) <= (len / size)
749 * so (assuming power-of-2 size) we do:
751 * pow = ceil(log2(size / len)) = log2(size) - floor(log2(len))
753 pow = ilog2(mtd->size) - ilog2(lock_len);
754 val = mask - (pow << shift);
757 /* Don't "lock" with no region! */
761 status_new = (status_old & ~mask & ~SR_TB) | val;
763 /* Disallow further writes if WP pin is asserted */
764 status_new |= SR_SRWD;
769 /* Don't bother if they're the same */
770 if (status_new == status_old)
773 /* Only modify protection if it will not unlock other areas */
774 if ((status_new & mask) < (status_old & mask))
777 return write_sr_and_check(nor, status_new, mask);
781 * Unlock a region of the flash. See stm_lock() for more info
783 * Returns negative on errors, 0 on success.
785 static int stm_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len)
787 struct mtd_info *mtd = &nor->mtd;
788 int status_old, status_new;
789 u8 mask = SR_BP2 | SR_BP1 | SR_BP0;
790 u8 shift = ffs(mask) - 1, pow, val;
792 bool can_be_top = true, can_be_bottom = nor->flags & SNOR_F_HAS_SR_TB;
795 status_old = read_sr(nor);
799 /* If nothing in our range is locked, we don't need to do anything */
800 if (stm_is_unlocked_sr(nor, ofs, len, status_old))
803 /* If anything below us is locked, we can't use 'top' protection */
804 if (!stm_is_unlocked_sr(nor, 0, ofs, status_old))
807 /* If anything above us is locked, we can't use 'bottom' protection */
808 if (!stm_is_unlocked_sr(nor, ofs + len, mtd->size - (ofs + len),
810 can_be_bottom = false;
812 if (!can_be_bottom && !can_be_top)
815 /* Prefer top, if both are valid */
816 use_top = can_be_top;
818 /* lock_len: length of region that should remain locked */
820 lock_len = mtd->size - (ofs + len);
825 * Need largest pow such that:
827 * 1 / (2^pow) >= (len / size)
829 * so (assuming power-of-2 size) we do:
831 * pow = floor(log2(size / len)) = log2(size) - ceil(log2(len))
833 pow = ilog2(mtd->size) - order_base_2(lock_len);
835 val = 0; /* fully unlocked */
837 val = mask - (pow << shift);
838 /* Some power-of-two sizes are not supported */
843 status_new = (status_old & ~mask & ~SR_TB) | val;
845 /* Don't protect status register if we're fully unlocked */
847 status_new &= ~SR_SRWD;
852 /* Don't bother if they're the same */
853 if (status_new == status_old)
856 /* Only modify protection if it will not lock other areas */
857 if ((status_new & mask) > (status_old & mask))
860 return write_sr_and_check(nor, status_new, mask);
864 * Check if a region of the flash is (completely) locked. See stm_lock() for
867 * Returns 1 if entire region is locked, 0 if any portion is unlocked, and
868 * negative on errors.
870 static int stm_is_locked(struct spi_nor *nor, loff_t ofs, uint64_t len)
874 status = read_sr(nor);
878 return stm_is_locked_sr(nor, ofs, len, status);
880 #endif /* CONFIG_SPI_FLASH_STMICRO */
882 /* Used when the "_ext_id" is two bytes at most */
883 #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
885 ((_jedec_id) >> 16) & 0xff, \
886 ((_jedec_id) >> 8) & 0xff, \
887 (_jedec_id) & 0xff, \
888 ((_ext_id) >> 8) & 0xff, \
891 .id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))), \
892 .sector_size = (_sector_size), \
893 .n_sectors = (_n_sectors), \
897 #define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
899 ((_jedec_id) >> 16) & 0xff, \
900 ((_jedec_id) >> 8) & 0xff, \
901 (_jedec_id) & 0xff, \
902 ((_ext_id) >> 16) & 0xff, \
903 ((_ext_id) >> 8) & 0xff, \
907 .sector_size = (_sector_size), \
908 .n_sectors = (_n_sectors), \
912 /* NOTE: double check command sets and memory organization when you add
913 * more nor chips. This current list focusses on newer chips, which
914 * have been converging on command sets which including JEDEC ID.
916 * All newly added entries should describe *hardware* and should use SECT_4K
917 * (or SECT_4K_PMC) if hardware supports erasing 4 KiB sectors. For usage
918 * scenarios excluding small sectors there is config option that can be
919 * disabled: CONFIG_MTD_SPI_NOR_USE_4K_SECTORS.
920 * For historical (and compatibility) reasons (before we got above config) some
921 * old entries may be missing 4K flag.
923 const struct flash_info spi_nor_ids[] = {
924 #ifdef CONFIG_SPI_FLASH_ATMEL /* ATMEL */
925 /* Atmel -- some are (confusingly) marketed as "DataFlash" */
926 { "at26df321", INFO(0x1f4700, 0, 64 * 1024, 64, SECT_4K) },
927 { "at25df321a", INFO(0x1f4701, 0, 64 * 1024, 64, SECT_4K) },
929 { "at45db011d", INFO(0x1f2200, 0, 64 * 1024, 4, SECT_4K) },
930 { "at45db021d", INFO(0x1f2300, 0, 64 * 1024, 8, SECT_4K) },
931 { "at45db041d", INFO(0x1f2400, 0, 64 * 1024, 8, SECT_4K) },
932 { "at45db081d", INFO(0x1f2500, 0, 64 * 1024, 16, SECT_4K) },
933 { "at45db161d", INFO(0x1f2600, 0, 64 * 1024, 32, SECT_4K) },
934 { "at45db321d", INFO(0x1f2700, 0, 64 * 1024, 64, SECT_4K) },
935 { "at45db641d", INFO(0x1f2800, 0, 64 * 1024, 128, SECT_4K) },
936 { "at26df081a", INFO(0x1f4501, 0, 64 * 1024, 16, SECT_4K) },
938 #ifdef CONFIG_SPI_FLASH_EON /* EON */
940 { "en25q32b", INFO(0x1c3016, 0, 64 * 1024, 64, 0) },
941 { "en25q64", INFO(0x1c3017, 0, 64 * 1024, 128, SECT_4K) },
942 { "en25qh128", INFO(0x1c7018, 0, 64 * 1024, 256, 0) },
943 { "en25s64", INFO(0x1c3817, 0, 64 * 1024, 128, SECT_4K) },
945 #ifdef CONFIG_SPI_FLASH_GIGADEVICE /* GIGADEVICE */
948 "gd25q16", INFO(0xc84015, 0, 64 * 1024, 32,
949 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
950 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
953 "gd25q32", INFO(0xc84016, 0, 64 * 1024, 64,
954 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
955 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
958 "gd25lq32", INFO(0xc86016, 0, 64 * 1024, 64,
959 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
960 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
963 "gd25q64", INFO(0xc84017, 0, 64 * 1024, 128,
964 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
965 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
968 #ifdef CONFIG_SPI_FLASH_ISSI /* ISSI */
970 { "is25lq040b", INFO(0x9d4013, 0, 64 * 1024, 8,
971 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
972 { "is25lp032", INFO(0x9d6016, 0, 64 * 1024, 64, 0) },
973 { "is25lp064", INFO(0x9d6017, 0, 64 * 1024, 128, 0) },
974 { "is25lp128", INFO(0x9d6018, 0, 64 * 1024, 256,
975 SECT_4K | SPI_NOR_DUAL_READ) },
976 { "is25lp256", INFO(0x9d6019, 0, 64 * 1024, 512,
977 SECT_4K | SPI_NOR_DUAL_READ) },
978 { "is25wp032", INFO(0x9d7016, 0, 64 * 1024, 64,
979 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
980 { "is25wp064", INFO(0x9d7017, 0, 64 * 1024, 128,
981 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
982 { "is25wp128", INFO(0x9d7018, 0, 64 * 1024, 256,
983 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
985 #ifdef CONFIG_SPI_FLASH_MACRONIX /* MACRONIX */
987 { "mx25l2005a", INFO(0xc22012, 0, 64 * 1024, 4, SECT_4K) },
988 { "mx25l4005a", INFO(0xc22013, 0, 64 * 1024, 8, SECT_4K) },
989 { "mx25l8005", INFO(0xc22014, 0, 64 * 1024, 16, 0) },
990 { "mx25l1606e", INFO(0xc22015, 0, 64 * 1024, 32, SECT_4K) },
991 { "mx25l3205d", INFO(0xc22016, 0, 64 * 1024, 64, SECT_4K) },
992 { "mx25l6405d", INFO(0xc22017, 0, 64 * 1024, 128, SECT_4K) },
993 { "mx25u2033e", INFO(0xc22532, 0, 64 * 1024, 4, SECT_4K) },
994 { "mx25u1635e", INFO(0xc22535, 0, 64 * 1024, 32, SECT_4K) },
995 { "mx25u6435f", INFO(0xc22537, 0, 64 * 1024, 128, SECT_4K) },
996 { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
997 { "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
998 { "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
999 { "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
1000 { "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
1001 { "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
1002 { "mx66u51235f", INFO(0xc2253a, 0, 64 * 1024, 1024, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
1003 { "mx66l1g45g", INFO(0xc2201b, 0, 64 * 1024, 2048, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1004 { "mx25l1633e", INFO(0xc22415, 0, 64 * 1024, 32, SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES | SECT_4K) },
1007 #ifdef CONFIG_SPI_FLASH_STMICRO /* STMICRO */
1009 { "n25q016a", INFO(0x20bb15, 0, 64 * 1024, 32, SECT_4K | SPI_NOR_QUAD_READ) },
1010 { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, SPI_NOR_QUAD_READ) },
1011 { "n25q032a", INFO(0x20bb16, 0, 64 * 1024, 64, SPI_NOR_QUAD_READ) },
1012 { "n25q064", INFO(0x20ba17, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_QUAD_READ) },
1013 { "n25q064a", INFO(0x20bb17, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_QUAD_READ) },
1014 { "n25q128a11", INFO(0x20bb18, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_QUAD_READ) },
1015 { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_QUAD_READ) },
1016 { "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1017 { "n25q256ax1", INFO(0x20bb19, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_QUAD_READ) },
1018 { "n25q512a", INFO(0x20bb20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
1019 { "n25q512ax3", INFO(0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
1020 { "n25q00", INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
1021 { "n25q00a", INFO(0x20bb21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
1022 { "mt25qu02g", INFO(0x20bb22, 0, 64 * 1024, 4096, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
1024 #ifdef CONFIG_SPI_FLASH_SPANSION /* SPANSION */
1025 /* Spansion/Cypress -- single (large) sector size only, at least
1026 * for the chips listed here (without boot sectors).
1028 { "s25sl032p", INFO(0x010215, 0x4d00, 64 * 1024, 64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1029 { "s25sl064p", INFO(0x010216, 0x4d00, 64 * 1024, 128, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1030 { "s25fl256s0", INFO(0x010219, 0x4d00, 256 * 1024, 128, USE_CLSR) },
1031 { "s25fl256s1", INFO(0x010219, 0x4d01, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1032 { "s25fl512s", INFO6(0x010220, 0x4d0081, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1033 { "s25fl512s_256k", INFO(0x010220, 0x4d00, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1034 { "s25fl512s_64k", INFO(0x010220, 0x4d01, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1035 { "s25fl512s_512k", INFO(0x010220, 0x4f00, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1036 { "s25sl12800", INFO(0x012018, 0x0300, 256 * 1024, 64, 0) },
1037 { "s25sl12801", INFO(0x012018, 0x0301, 64 * 1024, 256, 0) },
1038 { "s25fl128s", INFO6(0x012018, 0x4d0180, 64 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1039 { "s25fl129p0", INFO(0x012018, 0x4d00, 256 * 1024, 64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1040 { "s25fl129p1", INFO(0x012018, 0x4d01, 64 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
1041 { "s25sl008a", INFO(0x010213, 0, 64 * 1024, 16, 0) },
1042 { "s25sl016a", INFO(0x010214, 0, 64 * 1024, 32, 0) },
1043 { "s25sl032a", INFO(0x010215, 0, 64 * 1024, 64, 0) },
1044 { "s25sl064a", INFO(0x010216, 0, 64 * 1024, 128, 0) },
1045 { "s25fl116k", INFO(0x014015, 0, 64 * 1024, 32, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1046 { "s25fl164k", INFO(0x014017, 0, 64 * 1024, 128, SECT_4K) },
1047 { "s25fl208k", INFO(0x014014, 0, 64 * 1024, 16, SECT_4K | SPI_NOR_DUAL_READ) },
1048 { "s25fl128l", INFO(0x016018, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
1050 #ifdef CONFIG_SPI_FLASH_SST /* SST */
1051 /* SST -- large erase sizes are "overlays", "sectors" are 4K */
1052 { "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024, 8, SECT_4K | SST_WRITE) },
1053 { "sst25vf080b", INFO(0xbf258e, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
1054 { "sst25vf016b", INFO(0xbf2541, 0, 64 * 1024, 32, SECT_4K | SST_WRITE) },
1055 { "sst25vf032b", INFO(0xbf254a, 0, 64 * 1024, 64, SECT_4K | SST_WRITE) },
1056 { "sst25vf064c", INFO(0xbf254b, 0, 64 * 1024, 128, SECT_4K) },
1057 { "sst25wf512", INFO(0xbf2501, 0, 64 * 1024, 1, SECT_4K | SST_WRITE) },
1058 { "sst25wf010", INFO(0xbf2502, 0, 64 * 1024, 2, SECT_4K | SST_WRITE) },
1059 { "sst25wf020", INFO(0xbf2503, 0, 64 * 1024, 4, SECT_4K | SST_WRITE) },
1060 { "sst25wf020a", INFO(0x621612, 0, 64 * 1024, 4, SECT_4K) },
1061 { "sst25wf040b", INFO(0x621613, 0, 64 * 1024, 8, SECT_4K) },
1062 { "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8, SECT_4K | SST_WRITE) },
1063 { "sst25wf080", INFO(0xbf2505, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
1064 { "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1065 { "sst26wf016", INFO(0xbf2651, 0, 64 * 1024, 32, SECT_4K) },
1066 { "sst26wf032", INFO(0xbf2622, 0, 64 * 1024, 64, SECT_4K) },
1067 { "sst26wf064", INFO(0xbf2643, 0, 64 * 1024, 128, SECT_4K) },
1069 #ifdef CONFIG_SPI_FLASH_STMICRO /* STMICRO */
1070 /* ST Microelectronics -- newer production may have feature updates */
1071 { "m25p10", INFO(0x202011, 0, 32 * 1024, 4, 0) },
1072 { "m25p20", INFO(0x202012, 0, 64 * 1024, 4, 0) },
1073 { "m25p40", INFO(0x202013, 0, 64 * 1024, 8, 0) },
1074 { "m25p80", INFO(0x202014, 0, 64 * 1024, 16, 0) },
1075 { "m25p16", INFO(0x202015, 0, 64 * 1024, 32, 0) },
1076 { "m25p32", INFO(0x202016, 0, 64 * 1024, 64, 0) },
1077 { "m25p64", INFO(0x202017, 0, 64 * 1024, 128, 0) },
1078 { "m25p128", INFO(0x202018, 0, 256 * 1024, 64, 0) },
1079 { "m25pe16", INFO(0x208015, 0, 64 * 1024, 32, SECT_4K) },
1080 { "m25px16", INFO(0x207115, 0, 64 * 1024, 32, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1081 { "m25px64", INFO(0x207117, 0, 64 * 1024, 128, 0) },
1083 #ifdef CONFIG_SPI_FLASH_WINBOND /* WINBOND */
1084 /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
1085 { "w25x05", INFO(0xef3010, 0, 64 * 1024, 1, SECT_4K) },
1086 { "w25x10", INFO(0xef3011, 0, 64 * 1024, 2, SECT_4K) },
1087 { "w25x20", INFO(0xef3012, 0, 64 * 1024, 4, SECT_4K) },
1088 { "w25x40", INFO(0xef3013, 0, 64 * 1024, 8, SECT_4K) },
1089 { "w25x80", INFO(0xef3014, 0, 64 * 1024, 16, SECT_4K) },
1090 { "w25x16", INFO(0xef3015, 0, 64 * 1024, 32, SECT_4K) },
1092 "w25q16dw", INFO(0xef6015, 0, 64 * 1024, 32,
1093 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
1094 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
1096 { "w25x32", INFO(0xef3016, 0, 64 * 1024, 64, SECT_4K) },
1097 { "w25q20cl", INFO(0xef4012, 0, 64 * 1024, 4, SECT_4K) },
1098 { "w25q20bw", INFO(0xef5012, 0, 64 * 1024, 4, SECT_4K) },
1099 { "w25q20ew", INFO(0xef6012, 0, 64 * 1024, 4, SECT_4K) },
1100 { "w25q32", INFO(0xef4016, 0, 64 * 1024, 64, SECT_4K) },
1102 "w25q32dw", INFO(0xef6016, 0, 64 * 1024, 64,
1103 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
1104 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
1107 "w25q32jv", INFO(0xef7016, 0, 64 * 1024, 64,
1108 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
1109 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
1111 { "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) },
1112 { "w25q64", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) },
1114 "w25q64dw", INFO(0xef6017, 0, 64 * 1024, 128,
1115 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
1116 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
1119 "w25q128fw", INFO(0xef6018, 0, 64 * 1024, 256,
1120 SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
1121 SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
1123 { "w25q80", INFO(0xef5014, 0, 64 * 1024, 16, SECT_4K) },
1124 { "w25q80bl", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) },
1125 { "w25q128", INFO(0xef4018, 0, 64 * 1024, 256, SECT_4K) },
1126 { "w25q256", INFO(0xef4019, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1127 { "w25m512jv", INFO(0xef7119, 0, 64 * 1024, 1024,
1128 SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_DUAL_READ) },
1130 #ifdef CONFIG_SPI_FLASH_XMC
1131 /* XMC (Wuhan Xinxin Semiconductor Manufacturing Corp.) */
1132 { "XM25QH64A", INFO(0x207017, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1133 { "XM25QH128A", INFO(0x207018, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
1138 static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
1141 u8 id[SPI_NOR_MAX_ID_LEN];
1142 const struct flash_info *info;
1144 if (!ARRAY_SIZE(spi_nor_ids))
1145 return ERR_PTR(-ENODEV);
1147 tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, SPI_NOR_MAX_ID_LEN);
1149 dev_dbg(nor->dev, "error %d reading JEDEC ID\n", tmp);
1150 return ERR_PTR(tmp);
1153 for (tmp = 0; tmp < ARRAY_SIZE(spi_nor_ids) - 1; tmp++) {
1154 info = &spi_nor_ids[tmp];
1156 if (!memcmp(info->id, id, info->id_len))
1157 return &spi_nor_ids[tmp];
1160 dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %02x, %02x\n",
1161 id[0], id[1], id[2]);
1162 return ERR_PTR(-ENODEV);
1165 static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
1166 size_t *retlen, u_char *buf)
1168 struct spi_nor *nor = mtd_to_spi_nor(mtd);
1171 dev_dbg(nor->dev, "from 0x%08x, len %zd\n", (u32)from, len);
1175 size_t read_len = len;
1177 #ifdef CONFIG_SPI_FLASH_BAR
1180 ret = write_bar(nor, addr);
1182 return log_ret(ret);
1183 remain_len = (SZ_16M * (nor->bank_curr + 1)) - addr;
1185 if (len < remain_len)
1188 read_len = remain_len;
1191 ret = nor->read(nor, addr, read_len, buf);
1193 /* We shouldn't see 0-length reads */
1208 #ifdef CONFIG_SPI_FLASH_BAR
1209 ret = clean_bar(nor);
1214 #ifdef CONFIG_SPI_FLASH_SST
1215 static int sst_write_byteprogram(struct spi_nor *nor, loff_t to, size_t len,
1216 size_t *retlen, const u_char *buf)
1221 for (actual = 0; actual < len; actual++) {
1222 nor->program_opcode = SPINOR_OP_BP;
1225 /* write one byte. */
1226 ret = nor->write(nor, to, 1, buf + actual);
1229 ret = spi_nor_wait_till_ready(nor);
1240 static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
1241 size_t *retlen, const u_char *buf)
1243 struct spi_nor *nor = mtd_to_spi_nor(mtd);
1244 struct spi_slave *spi = nor->spi;
1248 dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);
1249 if (spi->mode & SPI_TX_BYTE)
1250 return sst_write_byteprogram(nor, to, len, retlen, buf);
1254 nor->sst_write_second = false;
1257 /* Start write from odd address. */
1259 nor->program_opcode = SPINOR_OP_BP;
1261 /* write one byte. */
1262 ret = nor->write(nor, to, 1, buf);
1265 ret = spi_nor_wait_till_ready(nor);
1271 /* Write out most of the data here. */
1272 for (; actual < len - 1; actual += 2) {
1273 nor->program_opcode = SPINOR_OP_AAI_WP;
1275 /* write two bytes. */
1276 ret = nor->write(nor, to, 2, buf + actual);
1279 ret = spi_nor_wait_till_ready(nor);
1283 nor->sst_write_second = true;
1285 nor->sst_write_second = false;
1288 ret = spi_nor_wait_till_ready(nor);
1292 /* Write out trailing byte if it exists. */
1293 if (actual != len) {
1296 nor->program_opcode = SPINOR_OP_BP;
1297 ret = nor->write(nor, to, 1, buf + actual);
1300 ret = spi_nor_wait_till_ready(nor);
1312 * Write an address range to the nor chip. Data must be written in
1313 * FLASH_PAGESIZE chunks. The address range may be any size provided
1314 * it is within the physical boundaries.
1316 static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
1317 size_t *retlen, const u_char *buf)
1319 struct spi_nor *nor = mtd_to_spi_nor(mtd);
1320 size_t page_offset, page_remain, i;
1323 dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);
1325 for (i = 0; i < len; ) {
1327 loff_t addr = to + i;
1330 * If page_size is a power of two, the offset can be quickly
1331 * calculated with an AND operation. On the other cases we
1332 * need to do a modulus operation (more expensive).
1333 * Power of two numbers have only one bit set and we can use
1334 * the instruction hweight32 to detect if we need to do a
1335 * modulus (do_div()) or not.
1337 if (hweight32(nor->page_size) == 1) {
1338 page_offset = addr & (nor->page_size - 1);
1342 page_offset = do_div(aux, nor->page_size);
1344 /* the size of data remaining on the first page */
1345 page_remain = min_t(size_t,
1346 nor->page_size - page_offset, len - i);
1348 #ifdef CONFIG_SPI_FLASH_BAR
1349 ret = write_bar(nor, addr);
1354 ret = nor->write(nor, addr, page_remain, buf + i);
1359 ret = spi_nor_wait_till_ready(nor);
1364 if (written != page_remain) {
1371 #ifdef CONFIG_SPI_FLASH_BAR
1372 ret = clean_bar(nor);
1377 #ifdef CONFIG_SPI_FLASH_MACRONIX
1379 * macronix_quad_enable() - set QE bit in Status Register.
1380 * @nor: pointer to a 'struct spi_nor'
1382 * Set the Quad Enable (QE) bit in the Status Register.
1384 * bit 6 of the Status Register is the QE bit for Macronix like QSPI memories.
1386 * Return: 0 on success, -errno otherwise.
1388 static int macronix_quad_enable(struct spi_nor *nor)
1395 if (val & SR_QUAD_EN_MX)
1400 write_sr(nor, val | SR_QUAD_EN_MX);
1402 ret = spi_nor_wait_till_ready(nor);
1407 if (!(ret > 0 && (ret & SR_QUAD_EN_MX))) {
1408 dev_err(nor->dev, "Macronix Quad bit not set\n");
1416 #if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
1418 * Write status Register and configuration register with 2 bytes
1419 * The first byte will be written to the status register, while the
1420 * second byte will be written to the configuration register.
1421 * Return negative if error occurred.
1423 static int write_sr_cr(struct spi_nor *nor, u8 *sr_cr)
1429 ret = nor->write_reg(nor, SPINOR_OP_WRSR, sr_cr, 2);
1432 "error while writing configuration register\n");
1436 ret = spi_nor_wait_till_ready(nor);
1439 "timeout while writing configuration register\n");
1447 * spansion_read_cr_quad_enable() - set QE bit in Configuration Register.
1448 * @nor: pointer to a 'struct spi_nor'
1450 * Set the Quad Enable (QE) bit in the Configuration Register.
1451 * This function should be used with QSPI memories supporting the Read
1452 * Configuration Register (35h) instruction.
1454 * bit 1 of the Configuration Register is the QE bit for Spansion like QSPI
1457 * Return: 0 on success, -errno otherwise.
1459 static int spansion_read_cr_quad_enable(struct spi_nor *nor)
1464 /* Check current Quad Enable bit value. */
1467 dev_dbg(dev, "error while reading configuration register\n");
1471 if (ret & CR_QUAD_EN_SPAN)
1474 sr_cr[1] = ret | CR_QUAD_EN_SPAN;
1476 /* Keep the current value of the Status Register. */
1479 dev_dbg(dev, "error while reading status register\n");
1484 ret = write_sr_cr(nor, sr_cr);
1488 /* Read back and check it. */
1490 if (!(ret > 0 && (ret & CR_QUAD_EN_SPAN))) {
1491 dev_dbg(nor->dev, "Spansion Quad bit not set\n");
1498 #if CONFIG_IS_ENABLED(SPI_FLASH_SFDP_SUPPORT)
1500 * spansion_no_read_cr_quad_enable() - set QE bit in Configuration Register.
1501 * @nor: pointer to a 'struct spi_nor'
1503 * Set the Quad Enable (QE) bit in the Configuration Register.
1504 * This function should be used with QSPI memories not supporting the Read
1505 * Configuration Register (35h) instruction.
1507 * bit 1 of the Configuration Register is the QE bit for Spansion like QSPI
1510 * Return: 0 on success, -errno otherwise.
1512 static int spansion_no_read_cr_quad_enable(struct spi_nor *nor)
1517 /* Keep the current value of the Status Register. */
1520 dev_dbg(nor->dev, "error while reading status register\n");
1524 sr_cr[1] = CR_QUAD_EN_SPAN;
1526 return write_sr_cr(nor, sr_cr);
1529 #endif /* CONFIG_SPI_FLASH_SFDP_SUPPORT */
1530 #endif /* CONFIG_SPI_FLASH_SPANSION */
1532 struct spi_nor_read_command {
1536 enum spi_nor_protocol proto;
1539 struct spi_nor_pp_command {
1541 enum spi_nor_protocol proto;
1544 enum spi_nor_read_command_index {
1547 SNOR_CMD_READ_1_1_1_DTR,
1550 SNOR_CMD_READ_1_1_2,
1551 SNOR_CMD_READ_1_2_2,
1552 SNOR_CMD_READ_2_2_2,
1553 SNOR_CMD_READ_1_2_2_DTR,
1556 SNOR_CMD_READ_1_1_4,
1557 SNOR_CMD_READ_1_4_4,
1558 SNOR_CMD_READ_4_4_4,
1559 SNOR_CMD_READ_1_4_4_DTR,
1562 SNOR_CMD_READ_1_1_8,
1563 SNOR_CMD_READ_1_8_8,
1564 SNOR_CMD_READ_8_8_8,
1565 SNOR_CMD_READ_1_8_8_DTR,
1570 enum spi_nor_pp_command_index {
1586 struct spi_nor_flash_parameter {
1590 struct spi_nor_hwcaps hwcaps;
1591 struct spi_nor_read_command reads[SNOR_CMD_READ_MAX];
1592 struct spi_nor_pp_command page_programs[SNOR_CMD_PP_MAX];
1594 int (*quad_enable)(struct spi_nor *nor);
1598 spi_nor_set_read_settings(struct spi_nor_read_command *read,
1602 enum spi_nor_protocol proto)
1604 read->num_mode_clocks = num_mode_clocks;
1605 read->num_wait_states = num_wait_states;
1606 read->opcode = opcode;
1607 read->proto = proto;
1611 spi_nor_set_pp_settings(struct spi_nor_pp_command *pp,
1613 enum spi_nor_protocol proto)
1615 pp->opcode = opcode;
1619 #if CONFIG_IS_ENABLED(SPI_FLASH_SFDP_SUPPORT)
1621 * Serial Flash Discoverable Parameters (SFDP) parsing.
1625 * spi_nor_read_sfdp() - read Serial Flash Discoverable Parameters.
1626 * @nor: pointer to a 'struct spi_nor'
1627 * @addr: offset in the SFDP area to start reading data from
1628 * @len: number of bytes to read
1629 * @buf: buffer where the SFDP data are copied into (dma-safe memory)
1631 * Whatever the actual numbers of bytes for address and dummy cycles are
1632 * for (Fast) Read commands, the Read SFDP (5Ah) instruction is always
1633 * followed by a 3-byte address and 8 dummy clock cycles.
1635 * Return: 0 on success, -errno otherwise.
1637 static int spi_nor_read_sfdp(struct spi_nor *nor, u32 addr,
1638 size_t len, void *buf)
1640 u8 addr_width, read_opcode, read_dummy;
1643 read_opcode = nor->read_opcode;
1644 addr_width = nor->addr_width;
1645 read_dummy = nor->read_dummy;
1647 nor->read_opcode = SPINOR_OP_RDSFDP;
1648 nor->addr_width = 3;
1649 nor->read_dummy = 8;
1652 ret = nor->read(nor, addr, len, (u8 *)buf);
1653 if (!ret || ret > len) {
1667 nor->read_opcode = read_opcode;
1668 nor->addr_width = addr_width;
1669 nor->read_dummy = read_dummy;
1674 struct sfdp_parameter_header {
1678 u8 length; /* in double words */
1679 u8 parameter_table_pointer[3]; /* byte address */
1683 #define SFDP_PARAM_HEADER_ID(p) (((p)->id_msb << 8) | (p)->id_lsb)
1684 #define SFDP_PARAM_HEADER_PTP(p) \
1685 (((p)->parameter_table_pointer[2] << 16) | \
1686 ((p)->parameter_table_pointer[1] << 8) | \
1687 ((p)->parameter_table_pointer[0] << 0))
1689 #define SFDP_BFPT_ID 0xff00 /* Basic Flash Parameter Table */
1690 #define SFDP_SECTOR_MAP_ID 0xff81 /* Sector Map Table */
1692 #define SFDP_SIGNATURE 0x50444653U
1693 #define SFDP_JESD216_MAJOR 1
1694 #define SFDP_JESD216_MINOR 0
1695 #define SFDP_JESD216A_MINOR 5
1696 #define SFDP_JESD216B_MINOR 6
1698 struct sfdp_header {
1699 u32 signature; /* Ox50444653U <=> "SFDP" */
1702 u8 nph; /* 0-base number of parameter headers */
1705 /* Basic Flash Parameter Table. */
1706 struct sfdp_parameter_header bfpt_header;
1709 /* Basic Flash Parameter Table */
1712 * JESD216 rev B defines a Basic Flash Parameter Table of 16 DWORDs.
1713 * They are indexed from 1 but C arrays are indexed from 0.
1715 #define BFPT_DWORD(i) ((i) - 1)
1716 #define BFPT_DWORD_MAX 16
1718 /* The first version of JESB216 defined only 9 DWORDs. */
1719 #define BFPT_DWORD_MAX_JESD216 9
1722 #define BFPT_DWORD1_FAST_READ_1_1_2 BIT(16)
1723 #define BFPT_DWORD1_ADDRESS_BYTES_MASK GENMASK(18, 17)
1724 #define BFPT_DWORD1_ADDRESS_BYTES_3_ONLY (0x0UL << 17)
1725 #define BFPT_DWORD1_ADDRESS_BYTES_3_OR_4 (0x1UL << 17)
1726 #define BFPT_DWORD1_ADDRESS_BYTES_4_ONLY (0x2UL << 17)
1727 #define BFPT_DWORD1_DTR BIT(19)
1728 #define BFPT_DWORD1_FAST_READ_1_2_2 BIT(20)
1729 #define BFPT_DWORD1_FAST_READ_1_4_4 BIT(21)
1730 #define BFPT_DWORD1_FAST_READ_1_1_4 BIT(22)
1733 #define BFPT_DWORD5_FAST_READ_2_2_2 BIT(0)
1734 #define BFPT_DWORD5_FAST_READ_4_4_4 BIT(4)
1737 #define BFPT_DWORD11_PAGE_SIZE_SHIFT 4
1738 #define BFPT_DWORD11_PAGE_SIZE_MASK GENMASK(7, 4)
1743 * (from JESD216 rev B)
1744 * Quad Enable Requirements (QER):
1745 * - 000b: Device does not have a QE bit. Device detects 1-1-4 and 1-4-4
1746 * reads based on instruction. DQ3/HOLD# functions are hold during
1747 * instruction phase.
1748 * - 001b: QE is bit 1 of status register 2. It is set via Write Status with
1749 * two data bytes where bit 1 of the second byte is one.
1751 * Writing only one byte to the status register has the side-effect of
1752 * clearing status register 2, including the QE bit. The 100b code is
1753 * used if writing one byte to the status register does not modify
1754 * status register 2.
1755 * - 010b: QE is bit 6 of status register 1. It is set via Write Status with
1756 * one data byte where bit 6 is one.
1758 * - 011b: QE is bit 7 of status register 2. It is set via Write status
1759 * register 2 instruction 3Eh with one data byte where bit 7 is one.
1761 * The status register 2 is read using instruction 3Fh.
1762 * - 100b: QE is bit 1 of status register 2. It is set via Write Status with
1763 * two data bytes where bit 1 of the second byte is one.
1765 * In contrast to the 001b code, writing one byte to the status
1766 * register does not modify status register 2.
1767 * - 101b: QE is bit 1 of status register 2. Status register 1 is read using
1768 * Read Status instruction 05h. Status register2 is read using
1769 * instruction 35h. QE is set via Writ Status instruction 01h with
1770 * two data bytes where bit 1 of the second byte is one.
1773 #define BFPT_DWORD15_QER_MASK GENMASK(22, 20)
1774 #define BFPT_DWORD15_QER_NONE (0x0UL << 20) /* Micron */
1775 #define BFPT_DWORD15_QER_SR2_BIT1_BUGGY (0x1UL << 20)
1776 #define BFPT_DWORD15_QER_SR1_BIT6 (0x2UL << 20) /* Macronix */
1777 #define BFPT_DWORD15_QER_SR2_BIT7 (0x3UL << 20)
1778 #define BFPT_DWORD15_QER_SR2_BIT1_NO_RD (0x4UL << 20)
1779 #define BFPT_DWORD15_QER_SR2_BIT1 (0x5UL << 20) /* Spansion */
1782 u32 dwords[BFPT_DWORD_MAX];
1785 /* Fast Read settings. */
1788 spi_nor_set_read_settings_from_bfpt(struct spi_nor_read_command *read,
1790 enum spi_nor_protocol proto)
1792 read->num_mode_clocks = (half >> 5) & 0x07;
1793 read->num_wait_states = (half >> 0) & 0x1f;
1794 read->opcode = (half >> 8) & 0xff;
1795 read->proto = proto;
1798 struct sfdp_bfpt_read {
1799 /* The Fast Read x-y-z hardware capability in params->hwcaps.mask. */
1803 * The <supported_bit> bit in <supported_dword> BFPT DWORD tells us
1804 * whether the Fast Read x-y-z command is supported.
1806 u32 supported_dword;
1810 * The half-word at offset <setting_shift> in <setting_dword> BFPT DWORD
1811 * encodes the op code, the number of mode clocks and the number of wait
1812 * states to be used by Fast Read x-y-z command.
1817 /* The SPI protocol for this Fast Read x-y-z command. */
1818 enum spi_nor_protocol proto;
1821 static const struct sfdp_bfpt_read sfdp_bfpt_reads[] = {
1822 /* Fast Read 1-1-2 */
1824 SNOR_HWCAPS_READ_1_1_2,
1825 BFPT_DWORD(1), BIT(16), /* Supported bit */
1826 BFPT_DWORD(4), 0, /* Settings */
1830 /* Fast Read 1-2-2 */
1832 SNOR_HWCAPS_READ_1_2_2,
1833 BFPT_DWORD(1), BIT(20), /* Supported bit */
1834 BFPT_DWORD(4), 16, /* Settings */
1838 /* Fast Read 2-2-2 */
1840 SNOR_HWCAPS_READ_2_2_2,
1841 BFPT_DWORD(5), BIT(0), /* Supported bit */
1842 BFPT_DWORD(6), 16, /* Settings */
1846 /* Fast Read 1-1-4 */
1848 SNOR_HWCAPS_READ_1_1_4,
1849 BFPT_DWORD(1), BIT(22), /* Supported bit */
1850 BFPT_DWORD(3), 16, /* Settings */
1854 /* Fast Read 1-4-4 */
1856 SNOR_HWCAPS_READ_1_4_4,
1857 BFPT_DWORD(1), BIT(21), /* Supported bit */
1858 BFPT_DWORD(3), 0, /* Settings */
1862 /* Fast Read 4-4-4 */
1864 SNOR_HWCAPS_READ_4_4_4,
1865 BFPT_DWORD(5), BIT(4), /* Supported bit */
1866 BFPT_DWORD(7), 16, /* Settings */
1871 struct sfdp_bfpt_erase {
1873 * The half-word at offset <shift> in DWORD <dwoard> encodes the
1874 * op code and erase sector size to be used by Sector Erase commands.
1880 static const struct sfdp_bfpt_erase sfdp_bfpt_erases[] = {
1881 /* Erase Type 1 in DWORD8 bits[15:0] */
1884 /* Erase Type 2 in DWORD8 bits[31:16] */
1885 {BFPT_DWORD(8), 16},
1887 /* Erase Type 3 in DWORD9 bits[15:0] */
1890 /* Erase Type 4 in DWORD9 bits[31:16] */
1891 {BFPT_DWORD(9), 16},
1894 static int spi_nor_hwcaps_read2cmd(u32 hwcaps);
1897 * spi_nor_parse_bfpt() - read and parse the Basic Flash Parameter Table.
1898 * @nor: pointer to a 'struct spi_nor'
1899 * @bfpt_header: pointer to the 'struct sfdp_parameter_header' describing
1900 * the Basic Flash Parameter Table length and version
1901 * @params: pointer to the 'struct spi_nor_flash_parameter' to be
1904 * The Basic Flash Parameter Table is the main and only mandatory table as
1905 * defined by the SFDP (JESD216) specification.
1906 * It provides us with the total size (memory density) of the data array and
1907 * the number of address bytes for Fast Read, Page Program and Sector Erase
1909 * For Fast READ commands, it also gives the number of mode clock cycles and
1910 * wait states (regrouped in the number of dummy clock cycles) for each
1911 * supported instruction op code.
1912 * For Page Program, the page size is now available since JESD216 rev A, however
1913 * the supported instruction op codes are still not provided.
1914 * For Sector Erase commands, this table stores the supported instruction op
1915 * codes and the associated sector sizes.
1916 * Finally, the Quad Enable Requirements (QER) are also available since JESD216
1917 * rev A. The QER bits encode the manufacturer dependent procedure to be
1918 * executed to set the Quad Enable (QE) bit in some internal register of the
1919 * Quad SPI memory. Indeed the QE bit, when it exists, must be set before
1920 * sending any Quad SPI command to the memory. Actually, setting the QE bit
1921 * tells the memory to reassign its WP# and HOLD#/RESET# pins to functions IO2
1922 * and IO3 hence enabling 4 (Quad) I/O lines.
1924 * Return: 0 on success, -errno otherwise.
1926 static int spi_nor_parse_bfpt(struct spi_nor *nor,
1927 const struct sfdp_parameter_header *bfpt_header,
1928 struct spi_nor_flash_parameter *params)
1930 struct mtd_info *mtd = &nor->mtd;
1931 struct sfdp_bfpt bfpt;
1937 /* JESD216 Basic Flash Parameter Table length is at least 9 DWORDs. */
1938 if (bfpt_header->length < BFPT_DWORD_MAX_JESD216)
1941 /* Read the Basic Flash Parameter Table. */
1942 len = min_t(size_t, sizeof(bfpt),
1943 bfpt_header->length * sizeof(u32));
1944 addr = SFDP_PARAM_HEADER_PTP(bfpt_header);
1945 memset(&bfpt, 0, sizeof(bfpt));
1946 err = spi_nor_read_sfdp(nor, addr, len, &bfpt);
1950 /* Fix endianness of the BFPT DWORDs. */
1951 for (i = 0; i < BFPT_DWORD_MAX; i++)
1952 bfpt.dwords[i] = le32_to_cpu(bfpt.dwords[i]);
1954 /* Number of address bytes. */
1955 switch (bfpt.dwords[BFPT_DWORD(1)] & BFPT_DWORD1_ADDRESS_BYTES_MASK) {
1956 case BFPT_DWORD1_ADDRESS_BYTES_3_ONLY:
1957 nor->addr_width = 3;
1960 case BFPT_DWORD1_ADDRESS_BYTES_4_ONLY:
1961 nor->addr_width = 4;
1968 /* Flash Memory Density (in bits). */
1969 params->size = bfpt.dwords[BFPT_DWORD(2)];
1970 if (params->size & BIT(31)) {
1971 params->size &= ~BIT(31);
1974 * Prevent overflows on params->size. Anyway, a NOR of 2^64
1975 * bits is unlikely to exist so this error probably means
1976 * the BFPT we are reading is corrupted/wrong.
1978 if (params->size > 63)
1981 params->size = 1ULL << params->size;
1985 params->size >>= 3; /* Convert to bytes. */
1987 /* Fast Read settings. */
1988 for (i = 0; i < ARRAY_SIZE(sfdp_bfpt_reads); i++) {
1989 const struct sfdp_bfpt_read *rd = &sfdp_bfpt_reads[i];
1990 struct spi_nor_read_command *read;
1992 if (!(bfpt.dwords[rd->supported_dword] & rd->supported_bit)) {
1993 params->hwcaps.mask &= ~rd->hwcaps;
1997 params->hwcaps.mask |= rd->hwcaps;
1998 cmd = spi_nor_hwcaps_read2cmd(rd->hwcaps);
1999 read = ¶ms->reads[cmd];
2000 half = bfpt.dwords[rd->settings_dword] >> rd->settings_shift;
2001 spi_nor_set_read_settings_from_bfpt(read, half, rd->proto);
2004 /* Sector Erase settings. */
2005 for (i = 0; i < ARRAY_SIZE(sfdp_bfpt_erases); i++) {
2006 const struct sfdp_bfpt_erase *er = &sfdp_bfpt_erases[i];
2010 half = bfpt.dwords[er->dword] >> er->shift;
2011 erasesize = half & 0xff;
2013 /* erasesize == 0 means this Erase Type is not supported. */
2017 erasesize = 1U << erasesize;
2018 opcode = (half >> 8) & 0xff;
2019 #ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
2020 if (erasesize == SZ_4K) {
2021 nor->erase_opcode = opcode;
2022 mtd->erasesize = erasesize;
2026 if (!mtd->erasesize || mtd->erasesize < erasesize) {
2027 nor->erase_opcode = opcode;
2028 mtd->erasesize = erasesize;
2032 /* Stop here if not JESD216 rev A or later. */
2033 if (bfpt_header->length < BFPT_DWORD_MAX)
2036 /* Page size: this field specifies 'N' so the page size = 2^N bytes. */
2037 params->page_size = bfpt.dwords[BFPT_DWORD(11)];
2038 params->page_size &= BFPT_DWORD11_PAGE_SIZE_MASK;
2039 params->page_size >>= BFPT_DWORD11_PAGE_SIZE_SHIFT;
2040 params->page_size = 1U << params->page_size;
2042 /* Quad Enable Requirements. */
2043 switch (bfpt.dwords[BFPT_DWORD(15)] & BFPT_DWORD15_QER_MASK) {
2044 case BFPT_DWORD15_QER_NONE:
2045 params->quad_enable = NULL;
2047 #if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
2048 case BFPT_DWORD15_QER_SR2_BIT1_BUGGY:
2049 case BFPT_DWORD15_QER_SR2_BIT1_NO_RD:
2050 params->quad_enable = spansion_no_read_cr_quad_enable;
2053 #ifdef CONFIG_SPI_FLASH_MACRONIX
2054 case BFPT_DWORD15_QER_SR1_BIT6:
2055 params->quad_enable = macronix_quad_enable;
2058 #if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
2059 case BFPT_DWORD15_QER_SR2_BIT1:
2060 params->quad_enable = spansion_read_cr_quad_enable;
2071 * spi_nor_parse_sfdp() - parse the Serial Flash Discoverable Parameters.
2072 * @nor: pointer to a 'struct spi_nor'
2073 * @params: pointer to the 'struct spi_nor_flash_parameter' to be
2076 * The Serial Flash Discoverable Parameters are described by the JEDEC JESD216
2077 * specification. This is a standard which tends to supported by almost all
2078 * (Q)SPI memory manufacturers. Those hard-coded tables allow us to learn at
2079 * runtime the main parameters needed to perform basic SPI flash operations such
2080 * as Fast Read, Page Program or Sector Erase commands.
2082 * Return: 0 on success, -errno otherwise.
2084 static int spi_nor_parse_sfdp(struct spi_nor *nor,
2085 struct spi_nor_flash_parameter *params)
2087 const struct sfdp_parameter_header *param_header, *bfpt_header;
2088 struct sfdp_parameter_header *param_headers = NULL;
2089 struct sfdp_header header;
2093 /* Get the SFDP header. */
2094 err = spi_nor_read_sfdp(nor, 0, sizeof(header), &header);
2098 /* Check the SFDP header version. */
2099 if (le32_to_cpu(header.signature) != SFDP_SIGNATURE ||
2100 header.major != SFDP_JESD216_MAJOR)
2104 * Verify that the first and only mandatory parameter header is a
2105 * Basic Flash Parameter Table header as specified in JESD216.
2107 bfpt_header = &header.bfpt_header;
2108 if (SFDP_PARAM_HEADER_ID(bfpt_header) != SFDP_BFPT_ID ||
2109 bfpt_header->major != SFDP_JESD216_MAJOR)
2113 * Allocate memory then read all parameter headers with a single
2114 * Read SFDP command. These parameter headers will actually be parsed
2115 * twice: a first time to get the latest revision of the basic flash
2116 * parameter table, then a second time to handle the supported optional
2118 * Hence we read the parameter headers once for all to reduce the
2119 * processing time. Also we use kmalloc() instead of devm_kmalloc()
2120 * because we don't need to keep these parameter headers: the allocated
2121 * memory is always released with kfree() before exiting this function.
2124 psize = header.nph * sizeof(*param_headers);
2126 param_headers = kmalloc(psize, GFP_KERNEL);
2130 err = spi_nor_read_sfdp(nor, sizeof(header),
2131 psize, param_headers);
2133 dev_err(dev, "failed to read SFDP parameter headers\n");
2139 * Check other parameter headers to get the latest revision of
2140 * the basic flash parameter table.
2142 for (i = 0; i < header.nph; i++) {
2143 param_header = ¶m_headers[i];
2145 if (SFDP_PARAM_HEADER_ID(param_header) == SFDP_BFPT_ID &&
2146 param_header->major == SFDP_JESD216_MAJOR &&
2147 (param_header->minor > bfpt_header->minor ||
2148 (param_header->minor == bfpt_header->minor &&
2149 param_header->length > bfpt_header->length)))
2150 bfpt_header = param_header;
2153 err = spi_nor_parse_bfpt(nor, bfpt_header, params);
2157 /* Parse other parameter headers. */
2158 for (i = 0; i < header.nph; i++) {
2159 param_header = ¶m_headers[i];
2161 switch (SFDP_PARAM_HEADER_ID(param_header)) {
2162 case SFDP_SECTOR_MAP_ID:
2163 dev_info(dev, "non-uniform erase sector maps are not supported yet.\n");
2175 kfree(param_headers);
2179 static int spi_nor_parse_sfdp(struct spi_nor *nor,
2180 struct spi_nor_flash_parameter *params)
2184 #endif /* SPI_FLASH_SFDP_SUPPORT */
2186 static int spi_nor_init_params(struct spi_nor *nor,
2187 const struct flash_info *info,
2188 struct spi_nor_flash_parameter *params)
2190 /* Set legacy flash parameters as default. */
2191 memset(params, 0, sizeof(*params));
2193 /* Set SPI NOR sizes. */
2194 params->size = info->sector_size * info->n_sectors;
2195 params->page_size = info->page_size;
2197 /* (Fast) Read settings. */
2198 params->hwcaps.mask |= SNOR_HWCAPS_READ;
2199 spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ],
2200 0, 0, SPINOR_OP_READ,
2203 if (!(info->flags & SPI_NOR_NO_FR)) {
2204 params->hwcaps.mask |= SNOR_HWCAPS_READ_FAST;
2205 spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_FAST],
2206 0, 8, SPINOR_OP_READ_FAST,
2210 if (info->flags & SPI_NOR_DUAL_READ) {
2211 params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_2;
2212 spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_1_1_2],
2213 0, 8, SPINOR_OP_READ_1_1_2,
2217 if (info->flags & SPI_NOR_QUAD_READ) {
2218 params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
2219 spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_1_1_4],
2220 0, 8, SPINOR_OP_READ_1_1_4,
2224 /* Page Program settings. */
2225 params->hwcaps.mask |= SNOR_HWCAPS_PP;
2226 spi_nor_set_pp_settings(¶ms->page_programs[SNOR_CMD_PP],
2227 SPINOR_OP_PP, SNOR_PROTO_1_1_1);
2229 if (info->flags & SPI_NOR_QUAD_READ) {
2230 params->hwcaps.mask |= SNOR_HWCAPS_PP_1_1_4;
2231 spi_nor_set_pp_settings(¶ms->page_programs[SNOR_CMD_PP_1_1_4],
2232 SPINOR_OP_PP_1_1_4, SNOR_PROTO_1_1_4);
2235 /* Select the procedure to set the Quad Enable bit. */
2236 if (params->hwcaps.mask & (SNOR_HWCAPS_READ_QUAD |
2237 SNOR_HWCAPS_PP_QUAD)) {
2238 switch (JEDEC_MFR(info)) {
2239 #ifdef CONFIG_SPI_FLASH_MACRONIX
2240 case SNOR_MFR_MACRONIX:
2241 params->quad_enable = macronix_quad_enable;
2245 case SNOR_MFR_MICRON:
2249 #if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
2250 /* Kept only for backward compatibility purpose. */
2251 params->quad_enable = spansion_read_cr_quad_enable;
2257 /* Override the parameters with data read from SFDP tables. */
2258 nor->addr_width = 0;
2259 nor->mtd.erasesize = 0;
2260 if ((info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) &&
2261 !(info->flags & SPI_NOR_SKIP_SFDP)) {
2262 struct spi_nor_flash_parameter sfdp_params;
2264 memcpy(&sfdp_params, params, sizeof(sfdp_params));
2265 if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
2266 nor->addr_width = 0;
2267 nor->mtd.erasesize = 0;
2269 memcpy(params, &sfdp_params, sizeof(*params));
2276 static int spi_nor_hwcaps2cmd(u32 hwcaps, const int table[][2], size_t size)
2280 for (i = 0; i < size; i++)
2281 if (table[i][0] == (int)hwcaps)
2287 static int spi_nor_hwcaps_read2cmd(u32 hwcaps)
2289 static const int hwcaps_read2cmd[][2] = {
2290 { SNOR_HWCAPS_READ, SNOR_CMD_READ },
2291 { SNOR_HWCAPS_READ_FAST, SNOR_CMD_READ_FAST },
2292 { SNOR_HWCAPS_READ_1_1_1_DTR, SNOR_CMD_READ_1_1_1_DTR },
2293 { SNOR_HWCAPS_READ_1_1_2, SNOR_CMD_READ_1_1_2 },
2294 { SNOR_HWCAPS_READ_1_2_2, SNOR_CMD_READ_1_2_2 },
2295 { SNOR_HWCAPS_READ_2_2_2, SNOR_CMD_READ_2_2_2 },
2296 { SNOR_HWCAPS_READ_1_2_2_DTR, SNOR_CMD_READ_1_2_2_DTR },
2297 { SNOR_HWCAPS_READ_1_1_4, SNOR_CMD_READ_1_1_4 },
2298 { SNOR_HWCAPS_READ_1_4_4, SNOR_CMD_READ_1_4_4 },
2299 { SNOR_HWCAPS_READ_4_4_4, SNOR_CMD_READ_4_4_4 },
2300 { SNOR_HWCAPS_READ_1_4_4_DTR, SNOR_CMD_READ_1_4_4_DTR },
2301 { SNOR_HWCAPS_READ_1_1_8, SNOR_CMD_READ_1_1_8 },
2302 { SNOR_HWCAPS_READ_1_8_8, SNOR_CMD_READ_1_8_8 },
2303 { SNOR_HWCAPS_READ_8_8_8, SNOR_CMD_READ_8_8_8 },
2304 { SNOR_HWCAPS_READ_1_8_8_DTR, SNOR_CMD_READ_1_8_8_DTR },
2307 return spi_nor_hwcaps2cmd(hwcaps, hwcaps_read2cmd,
2308 ARRAY_SIZE(hwcaps_read2cmd));
2311 static int spi_nor_hwcaps_pp2cmd(u32 hwcaps)
2313 static const int hwcaps_pp2cmd[][2] = {
2314 { SNOR_HWCAPS_PP, SNOR_CMD_PP },
2315 { SNOR_HWCAPS_PP_1_1_4, SNOR_CMD_PP_1_1_4 },
2316 { SNOR_HWCAPS_PP_1_4_4, SNOR_CMD_PP_1_4_4 },
2317 { SNOR_HWCAPS_PP_4_4_4, SNOR_CMD_PP_4_4_4 },
2318 { SNOR_HWCAPS_PP_1_1_8, SNOR_CMD_PP_1_1_8 },
2319 { SNOR_HWCAPS_PP_1_8_8, SNOR_CMD_PP_1_8_8 },
2320 { SNOR_HWCAPS_PP_8_8_8, SNOR_CMD_PP_8_8_8 },
2323 return spi_nor_hwcaps2cmd(hwcaps, hwcaps_pp2cmd,
2324 ARRAY_SIZE(hwcaps_pp2cmd));
2327 static int spi_nor_select_read(struct spi_nor *nor,
2328 const struct spi_nor_flash_parameter *params,
2331 int cmd, best_match = fls(shared_hwcaps & SNOR_HWCAPS_READ_MASK) - 1;
2332 const struct spi_nor_read_command *read;
2337 cmd = spi_nor_hwcaps_read2cmd(BIT(best_match));
2341 read = ¶ms->reads[cmd];
2342 nor->read_opcode = read->opcode;
2343 nor->read_proto = read->proto;
2346 * In the spi-nor framework, we don't need to make the difference
2347 * between mode clock cycles and wait state clock cycles.
2348 * Indeed, the value of the mode clock cycles is used by a QSPI
2349 * flash memory to know whether it should enter or leave its 0-4-4
2350 * (Continuous Read / XIP) mode.
2351 * eXecution In Place is out of the scope of the mtd sub-system.
2352 * Hence we choose to merge both mode and wait state clock cycles
2353 * into the so called dummy clock cycles.
2355 nor->read_dummy = read->num_mode_clocks + read->num_wait_states;
2359 static int spi_nor_select_pp(struct spi_nor *nor,
2360 const struct spi_nor_flash_parameter *params,
2363 int cmd, best_match = fls(shared_hwcaps & SNOR_HWCAPS_PP_MASK) - 1;
2364 const struct spi_nor_pp_command *pp;
2369 cmd = spi_nor_hwcaps_pp2cmd(BIT(best_match));
2373 pp = ¶ms->page_programs[cmd];
2374 nor->program_opcode = pp->opcode;
2375 nor->write_proto = pp->proto;
2379 static int spi_nor_select_erase(struct spi_nor *nor,
2380 const struct flash_info *info)
2382 struct mtd_info *mtd = &nor->mtd;
2384 /* Do nothing if already configured from SFDP. */
2388 #ifdef CONFIG_SPI_FLASH_USE_4K_SECTORS
2389 /* prefer "small sector" erase if possible */
2390 if (info->flags & SECT_4K) {
2391 nor->erase_opcode = SPINOR_OP_BE_4K;
2392 mtd->erasesize = 4096;
2393 } else if (info->flags & SECT_4K_PMC) {
2394 nor->erase_opcode = SPINOR_OP_BE_4K_PMC;
2395 mtd->erasesize = 4096;
2399 nor->erase_opcode = SPINOR_OP_SE;
2400 mtd->erasesize = info->sector_size;
2405 static int spi_nor_setup(struct spi_nor *nor, const struct flash_info *info,
2406 const struct spi_nor_flash_parameter *params,
2407 const struct spi_nor_hwcaps *hwcaps)
2409 u32 ignored_mask, shared_mask;
2410 bool enable_quad_io;
2414 * Keep only the hardware capabilities supported by both the SPI
2415 * controller and the SPI flash memory.
2417 shared_mask = hwcaps->mask & params->hwcaps.mask;
2419 /* SPI n-n-n protocols are not supported yet. */
2420 ignored_mask = (SNOR_HWCAPS_READ_2_2_2 |
2421 SNOR_HWCAPS_READ_4_4_4 |
2422 SNOR_HWCAPS_READ_8_8_8 |
2423 SNOR_HWCAPS_PP_4_4_4 |
2424 SNOR_HWCAPS_PP_8_8_8);
2425 if (shared_mask & ignored_mask) {
2427 "SPI n-n-n protocols are not supported yet.\n");
2428 shared_mask &= ~ignored_mask;
2431 /* Select the (Fast) Read command. */
2432 err = spi_nor_select_read(nor, params, shared_mask);
2435 "can't select read settings supported by both the SPI controller and memory.\n");
2439 /* Select the Page Program command. */
2440 err = spi_nor_select_pp(nor, params, shared_mask);
2443 "can't select write settings supported by both the SPI controller and memory.\n");
2447 /* Select the Sector Erase command. */
2448 err = spi_nor_select_erase(nor, info);
2451 "can't select erase settings supported by both the SPI controller and memory.\n");
2455 /* Enable Quad I/O if needed. */
2456 enable_quad_io = (spi_nor_get_protocol_width(nor->read_proto) == 4 ||
2457 spi_nor_get_protocol_width(nor->write_proto) == 4);
2458 if (enable_quad_io && params->quad_enable)
2459 nor->quad_enable = params->quad_enable;
2461 nor->quad_enable = NULL;
2466 static int spi_nor_init(struct spi_nor *nor)
2471 * Atmel, SST, Intel/Numonyx, and others serial NOR tend to power up
2472 * with the software protection bits set
2474 if (JEDEC_MFR(nor->info) == SNOR_MFR_ATMEL ||
2475 JEDEC_MFR(nor->info) == SNOR_MFR_INTEL ||
2476 JEDEC_MFR(nor->info) == SNOR_MFR_SST ||
2477 nor->info->flags & SPI_NOR_HAS_LOCK) {
2480 spi_nor_wait_till_ready(nor);
2483 if (nor->quad_enable) {
2484 err = nor->quad_enable(nor);
2486 dev_dbg(nor->dev, "quad mode not supported\n");
2491 if (nor->addr_width == 4 &&
2492 (JEDEC_MFR(nor->info) != SNOR_MFR_SPANSION) &&
2493 !(nor->info->flags & SPI_NOR_4B_OPCODES)) {
2495 * If the RESET# pin isn't hooked up properly, or the system
2496 * otherwise doesn't perform a reset command in the boot
2497 * sequence, it's impossible to 100% protect against unexpected
2498 * reboots (e.g., crashes). Warn the user (or hopefully, system
2499 * designer) that this is bad.
2501 if (nor->flags & SNOR_F_BROKEN_RESET)
2502 printf("enabling reset hack; may not recover from unexpected reboots\n");
2503 set_4byte(nor, nor->info, 1);
2509 int spi_nor_scan(struct spi_nor *nor)
2511 struct spi_nor_flash_parameter params;
2512 const struct flash_info *info = NULL;
2513 struct mtd_info *mtd = &nor->mtd;
2514 struct spi_nor_hwcaps hwcaps = {
2515 .mask = SNOR_HWCAPS_READ |
2516 SNOR_HWCAPS_READ_FAST |
2519 struct spi_slave *spi = nor->spi;
2522 /* Reset SPI protocol for all commands. */
2523 nor->reg_proto = SNOR_PROTO_1_1_1;
2524 nor->read_proto = SNOR_PROTO_1_1_1;
2525 nor->write_proto = SNOR_PROTO_1_1_1;
2526 nor->read = spi_nor_read_data;
2527 nor->write = spi_nor_write_data;
2528 nor->read_reg = spi_nor_read_reg;
2529 nor->write_reg = spi_nor_write_reg;
2531 if (spi->mode & SPI_RX_QUAD) {
2532 hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
2534 if (spi->mode & SPI_TX_QUAD)
2535 hwcaps.mask |= (SNOR_HWCAPS_READ_1_4_4 |
2536 SNOR_HWCAPS_PP_1_1_4 |
2537 SNOR_HWCAPS_PP_1_4_4);
2538 } else if (spi->mode & SPI_RX_DUAL) {
2539 hwcaps.mask |= SNOR_HWCAPS_READ_1_1_2;
2541 if (spi->mode & SPI_TX_DUAL)
2542 hwcaps.mask |= SNOR_HWCAPS_READ_1_2_2;
2545 info = spi_nor_read_id(nor);
2546 if (IS_ERR_OR_NULL(info))
2548 /* Parse the Serial Flash Discoverable Parameters table. */
2549 ret = spi_nor_init_params(nor, info, ¶ms);
2554 mtd->name = info->name;
2556 mtd->type = MTD_NORFLASH;
2558 mtd->flags = MTD_CAP_NORFLASH;
2559 mtd->size = params.size;
2560 mtd->_erase = spi_nor_erase;
2561 mtd->_read = spi_nor_read;
2563 #if defined(CONFIG_SPI_FLASH_STMICRO) || defined(CONFIG_SPI_FLASH_SST)
2564 /* NOR protection support for STmicro/Micron chips and similar */
2565 if (JEDEC_MFR(info) == SNOR_MFR_ST ||
2566 JEDEC_MFR(info) == SNOR_MFR_MICRON ||
2567 JEDEC_MFR(info) == SNOR_MFR_SST ||
2568 info->flags & SPI_NOR_HAS_LOCK) {
2569 nor->flash_lock = stm_lock;
2570 nor->flash_unlock = stm_unlock;
2571 nor->flash_is_locked = stm_is_locked;
2575 #ifdef CONFIG_SPI_FLASH_SST
2576 /* sst nor chips use AAI word program */
2577 if (info->flags & SST_WRITE)
2578 mtd->_write = sst_write;
2581 mtd->_write = spi_nor_write;
2583 if (info->flags & USE_FSR)
2584 nor->flags |= SNOR_F_USE_FSR;
2585 if (info->flags & SPI_NOR_HAS_TB)
2586 nor->flags |= SNOR_F_HAS_SR_TB;
2587 if (info->flags & NO_CHIP_ERASE)
2588 nor->flags |= SNOR_F_NO_OP_CHIP_ERASE;
2589 if (info->flags & USE_CLSR)
2590 nor->flags |= SNOR_F_USE_CLSR;
2592 if (info->flags & SPI_NOR_NO_ERASE)
2593 mtd->flags |= MTD_NO_ERASE;
2595 nor->page_size = params.page_size;
2596 mtd->writebufsize = nor->page_size;
2598 /* Some devices cannot do fast-read, no matter what DT tells us */
2599 if ((info->flags & SPI_NOR_NO_FR) || (spi->mode & SPI_RX_SLOW))
2600 params.hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST;
2603 * Configure the SPI memory:
2604 * - select op codes for (Fast) Read, Page Program and Sector Erase.
2605 * - set the number of dummy cycles (mode cycles + wait states).
2606 * - set the SPI protocols for register and memory accesses.
2607 * - set the Quad Enable bit if needed (required by SPI x-y-4 protos).
2609 ret = spi_nor_setup(nor, info, ¶ms, &hwcaps);
2613 if (nor->addr_width) {
2614 /* already configured from SFDP */
2615 } else if (info->addr_width) {
2616 nor->addr_width = info->addr_width;
2617 } else if (mtd->size > SZ_16M) {
2618 #ifndef CONFIG_SPI_FLASH_BAR
2619 /* enable 4-byte addressing if the device exceeds 16MiB */
2620 nor->addr_width = 4;
2621 if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
2622 info->flags & SPI_NOR_4B_OPCODES)
2623 spi_nor_set_4byte_opcodes(nor, info);
2625 /* Configure the BAR - discover bank cmds and read current bank */
2626 nor->addr_width = 3;
2627 ret = read_bar(nor, info);
2632 nor->addr_width = 3;
2635 if (nor->addr_width > SPI_NOR_MAX_ADDR_WIDTH) {
2636 dev_dbg(dev, "address width is too large: %u\n",
2641 /* Send all the required SPI flash commands to initialize device */
2643 ret = spi_nor_init(nor);
2647 nor->name = mtd->name;
2648 nor->size = mtd->size;
2649 nor->erase_size = mtd->erasesize;
2650 nor->sector_size = mtd->erasesize;
2652 #ifndef CONFIG_SPL_BUILD
2653 printf("SF: Detected %s with page size ", nor->name);
2654 print_size(nor->page_size, ", erase size ");
2655 print_size(nor->erase_size, ", total ");
2656 print_size(nor->size, "");
2663 /* U-Boot specific functions, need to extend MTD to support these */
2664 int spi_flash_cmd_get_sw_write_prot(struct spi_nor *nor)
2666 int sr = read_sr(nor);
2671 return (sr >> 2) & 7;