forked from Minki/linux
cb481b92d1
It makes the core file a bit smaller and provides better separation between the SFDP parsing and core logic. Keep the core.h and sfdp.h definitions private in drivers/mtd/spi-nor/. Both expose just the definitions that are required by the core and manufacturer drivers. None of the SPI NOR controller drivers should include them. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
99 lines
3.5 KiB
C
99 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2005, Intec Automation Inc.
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* Copyright (C) 2014, Freescale Semiconductor, Inc.
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*/
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#ifndef __LINUX_MTD_SFDP_H
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#define __LINUX_MTD_SFDP_H
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/* Basic Flash Parameter Table */
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/*
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* JESD216 rev B defines a Basic Flash Parameter Table of 16 DWORDs.
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* They are indexed from 1 but C arrays are indexed from 0.
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*/
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#define BFPT_DWORD(i) ((i) - 1)
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#define BFPT_DWORD_MAX 16
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struct sfdp_bfpt {
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u32 dwords[BFPT_DWORD_MAX];
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};
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/* The first version of JESD216 defined only 9 DWORDs. */
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#define BFPT_DWORD_MAX_JESD216 9
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/* 1st DWORD. */
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#define BFPT_DWORD1_FAST_READ_1_1_2 BIT(16)
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#define BFPT_DWORD1_ADDRESS_BYTES_MASK GENMASK(18, 17)
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#define BFPT_DWORD1_ADDRESS_BYTES_3_ONLY (0x0UL << 17)
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#define BFPT_DWORD1_ADDRESS_BYTES_3_OR_4 (0x1UL << 17)
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#define BFPT_DWORD1_ADDRESS_BYTES_4_ONLY (0x2UL << 17)
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#define BFPT_DWORD1_DTR BIT(19)
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#define BFPT_DWORD1_FAST_READ_1_2_2 BIT(20)
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#define BFPT_DWORD1_FAST_READ_1_4_4 BIT(21)
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#define BFPT_DWORD1_FAST_READ_1_1_4 BIT(22)
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/* 5th DWORD. */
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#define BFPT_DWORD5_FAST_READ_2_2_2 BIT(0)
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#define BFPT_DWORD5_FAST_READ_4_4_4 BIT(4)
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/* 11th DWORD. */
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#define BFPT_DWORD11_PAGE_SIZE_SHIFT 4
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#define BFPT_DWORD11_PAGE_SIZE_MASK GENMASK(7, 4)
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/* 15th DWORD. */
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/*
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* (from JESD216 rev B)
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* Quad Enable Requirements (QER):
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* - 000b: Device does not have a QE bit. Device detects 1-1-4 and 1-4-4
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* reads based on instruction. DQ3/HOLD# functions are hold during
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* instruction phase.
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* - 001b: QE is bit 1 of status register 2. It is set via Write Status with
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* two data bytes where bit 1 of the second byte is one.
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* [...]
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* Writing only one byte to the status register has the side-effect of
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* clearing status register 2, including the QE bit. The 100b code is
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* used if writing one byte to the status register does not modify
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* status register 2.
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* - 010b: QE is bit 6 of status register 1. It is set via Write Status with
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* one data byte where bit 6 is one.
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* [...]
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* - 011b: QE is bit 7 of status register 2. It is set via Write status
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* register 2 instruction 3Eh with one data byte where bit 7 is one.
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* [...]
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* The status register 2 is read using instruction 3Fh.
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* - 100b: QE is bit 1 of status register 2. It is set via Write Status with
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* two data bytes where bit 1 of the second byte is one.
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* [...]
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* In contrast to the 001b code, writing one byte to the status
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* register does not modify status register 2.
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* - 101b: QE is bit 1 of status register 2. Status register 1 is read using
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* Read Status instruction 05h. Status register2 is read using
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* instruction 35h. QE is set via Write Status instruction 01h with
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* two data bytes where bit 1 of the second byte is one.
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* [...]
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*/
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#define BFPT_DWORD15_QER_MASK GENMASK(22, 20)
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#define BFPT_DWORD15_QER_NONE (0x0UL << 20) /* Micron */
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#define BFPT_DWORD15_QER_SR2_BIT1_BUGGY (0x1UL << 20)
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#define BFPT_DWORD15_QER_SR1_BIT6 (0x2UL << 20) /* Macronix */
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#define BFPT_DWORD15_QER_SR2_BIT7 (0x3UL << 20)
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#define BFPT_DWORD15_QER_SR2_BIT1_NO_RD (0x4UL << 20)
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#define BFPT_DWORD15_QER_SR2_BIT1 (0x5UL << 20) /* Spansion */
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struct sfdp_parameter_header {
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u8 id_lsb;
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u8 minor;
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u8 major;
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u8 length; /* in double words */
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u8 parameter_table_pointer[3]; /* byte address */
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u8 id_msb;
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};
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int spi_nor_parse_sfdp(struct spi_nor *nor,
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struct spi_nor_flash_parameter *params);
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#endif /* __LINUX_MTD_SFDP_H */
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