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spi-nor.h
/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (C) 2014 Freescale Semiconductor, Inc. */ #ifndef __LINUX_MTD_SPI_NOR_H #define __LINUX_MTD_SPI_NOR_H #include <linux/bitops.h> #include <linux/mtd/mtd.h> #include <linux/spi/spi-mem.h> /* * Note on opcode nomenclature: some opcodes have a format like * SPINOR_OP_FUNCTION{4,}_x_y_z. The numbers x, y, and z stand for the number * of I/O lines used for the opcode, address, and data (respectively). The * FUNCTION has an optional suffix of '4', to represent an opcode which * requires a 4-byte (32-bit) address. */ /* Flash opcodes. */ #define SPINOR_OP_WRDI 0x04 /* Write disable */ #define SPINOR_OP_WREN 0x06 /* Write enable */ #define SPINOR_OP_RDSR 0x05 /* Read status register */ #define SPINOR_OP_WRSR 0x01 /* Write status register 1 byte */ #define SPINOR_OP_RDSR2 0x3f /* Read status register 2 */ #define SPINOR_OP_WRSR2 0x3e /* Write status register 2 */ #define SPINOR_OP_READ 0x03 /* Read data bytes (low frequency) */ #define SPINOR_OP_READ_FAST 0x0b /* Read data bytes (high frequency) */ #define SPINOR_OP_READ_1_1_2 0x3b /* Read data bytes (Dual Output SPI) */ #define SPINOR_OP_READ_1_2_2 0xbb /* Read data bytes (Dual I/O SPI) */ #define SPINOR_OP_READ_1_1_4 0x6b /* Read data bytes (Quad Output SPI) */ #define SPINOR_OP_READ_1_4_4 0xeb /* Read data bytes (Quad I/O SPI) */ #define SPINOR_OP_READ_1_1_8 0x8b /* Read data bytes (Octal Output SPI) */ #define SPINOR_OP_READ_1_8_8 0xcb /* Read data bytes (Octal I/O SPI) */ #define SPINOR_OP_PP 0x02 /* Page program (up to 256 bytes) */ #define SPINOR_OP_PP_1_1_4 0x32 /* Quad page program */ #define SPINOR_OP_PP_1_4_4 0x38 /* Quad page program */ #define SPINOR_OP_PP_1_1_8 0x82 /* Octal page program */ #define SPINOR_OP_PP_1_8_8 0xc2 /* Octal page program */ #define SPINOR_OP_BE_4K 0x20 /* Erase 4KiB block */ #define SPINOR_OP_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips */ #define SPINOR_OP_BE_32K 0x52 /* Erase 32KiB block */ #define SPINOR_OP_CHIP_ERASE 0xc7 /* Erase whole flash chip */ #define SPINOR_OP_SE 0xd8 /* Sector erase (usually 64KiB) */ #define SPINOR_OP_RDID 0x9f /* Read JEDEC ID */ #define SPINOR_OP_RDSFDP 0x5a /* Read SFDP */ #define SPINOR_OP_RDCR 0x35 /* Read configuration register */ #define SPINOR_OP_SRSTEN 0x66 /* Software Reset Enable */ #define SPINOR_OP_SRST 0x99 /* Software Reset */ #define SPINOR_OP_GBULK 0x98 /* Global Block Unlock */ /* 4-byte address opcodes - used on Spansion and some Macronix flashes. */ #define SPINOR_OP_READ_4B 0x13 /* Read data bytes (low frequency) */ #define SPINOR_OP_READ_FAST_4B 0x0c /* Read data bytes (high frequency) */ #define SPINOR_OP_READ_1_1_2_4B 0x3c /* Read data bytes (Dual Output SPI) */ #define SPINOR_OP_READ_1_2_2_4B 0xbc /* Read data bytes (Dual I/O SPI) */ #define SPINOR_OP_READ_1_1_4_4B 0x6c /* Read data bytes (Quad Output SPI) */ #define SPINOR_OP_READ_1_4_4_4B 0xec /* Read data bytes (Quad I/O SPI) */ #define SPINOR_OP_READ_1_1_8_4B 0x7c /* Read data bytes (Octal Output SPI) */ #define SPINOR_OP_READ_1_8_8_4B 0xcc /* Read data bytes (Octal I/O SPI) */ #define SPINOR_OP_PP_4B 0x12 /* Page program (up to 256 bytes) */ #define SPINOR_OP_PP_1_1_4_4B 0x34 /* Quad page program */ #define SPINOR_OP_PP_1_4_4_4B 0x3e /* Quad page program */ #define SPINOR_OP_PP_1_1_8_4B 0x84 /* Octal page program */ #define SPINOR_OP_PP_1_8_8_4B 0x8e /* Octal page program */ #define SPINOR_OP_BE_4K_4B 0x21 /* Erase 4KiB block */ #define SPINOR_OP_BE_32K_4B 0x5c /* Erase 32KiB block */ #define SPINOR_OP_SE_4B 0xdc /* Sector erase (usually 64KiB) */ /* Double Transfer Rate opcodes - defined in JEDEC JESD216B. */ #define SPINOR_OP_READ_1_1_1_DTR 0x0d #define SPINOR_OP_READ_1_2_2_DTR 0xbd #define SPINOR_OP_READ_1_4_4_DTR 0xed #define SPINOR_OP_READ_1_1_1_DTR_4B 0x0e #define SPINOR_OP_READ_1_2_2_DTR_4B 0xbe #define SPINOR_OP_READ_1_4_4_DTR_4B 0xee /* Used for SST flashes only. */ #define SPINOR_OP_BP 0x02 /* Byte program */ #define SPINOR_OP_AAI_WP 0xad /* Auto address increment word program */ /* Used for Macronix and Winbond flashes. */ #define SPINOR_OP_EN4B 0xb7 /* Enter 4-byte mode */ #define SPINOR_OP_EX4B 0xe9 /* Exit 4-byte mode */ /* Used for Spansion flashes only. */ #define SPINOR_OP_BRWR 0x17 /* Bank register write */ /* Used for Micron flashes only. */ #define SPINOR_OP_RD_EVCR 0x65 /* Read EVCR register */ #define SPINOR_OP_WD_EVCR 0x61 /* Write EVCR register */ /* Used for GigaDevices and Winbond flashes. */ #define SPINOR_OP_ESECR 0x44 /* Erase Security registers */ #define SPINOR_OP_PSECR 0x42 /* Program Security registers */ #define SPINOR_OP_RSECR 0x48 /* Read Security registers */ /* Status Register bits. */ #define SR_WIP BIT(0) /* Write in progress */ #define SR_WEL BIT(1) /* Write enable latch */ /* meaning of other SR_* bits may differ between vendors */ #define SR_BP0 BIT(2) /* Block protect 0 */ #define SR_BP1 BIT(3) /* Block protect 1 */ #define SR_BP2 BIT(4) /* Block protect 2 */ #define SR_BP3 BIT(5) /* Block protect 3 */ #define SR_TB_BIT5 BIT(5) /* Top/Bottom protect */ #define SR_BP3_BIT6 BIT(6) /* Block protect 3 */ #define SR_TB_BIT6 BIT(6) /* Top/Bottom protect */ #define SR_SRWD BIT(7) /* SR write protect */ /* Spansion/Cypress specific status bits */ #define SR_E_ERR BIT(5) #define SR_P_ERR BIT(6) #define SR1_QUAD_EN_BIT6 BIT(6) #define SR_BP_SHIFT 2 /* Enhanced Volatile Configuration Register bits */ #define EVCR_QUAD_EN_MICRON BIT(7) /* Micron Quad I/O */ /* Status Register 2 bits. */ #define SR2_QUAD_EN_BIT1 BIT(1) #define SR2_LB1 BIT(3) /* Security Register Lock Bit 1 */ #define SR2_LB2 BIT(4) /* Security Register Lock Bit 2 */ #define SR2_LB3 BIT(5) /* Security Register Lock Bit 3 */ #define SR2_QUAD_EN_BIT7 BIT(7) /* Supported SPI protocols */ #define SNOR_PROTO_INST_MASK GENMASK(23, 16) #define SNOR_PROTO_INST_SHIFT 16 #define SNOR_PROTO_INST(_nbits) \ ((((unsigned long)(_nbits)) << SNOR_PROTO_INST_SHIFT) & \ SNOR_PROTO_INST_MASK) #define SNOR_PROTO_ADDR_MASK GENMASK(15, 8) #define SNOR_PROTO_ADDR_SHIFT 8 #define SNOR_PROTO_ADDR(_nbits) \ ((((unsigned long)(_nbits)) << SNOR_PROTO_ADDR_SHIFT) & \ SNOR_PROTO_ADDR_MASK) #define SNOR_PROTO_DATA_MASK GENMASK(7, 0) #define SNOR_PROTO_DATA_SHIFT 0 #define SNOR_PROTO_DATA(_nbits) \ ((((unsigned long)(_nbits)) << SNOR_PROTO_DATA_SHIFT) & \ SNOR_PROTO_DATA_MASK) #define SNOR_PROTO_IS_DTR BIT(24) /* Double Transfer Rate */ #define SNOR_PROTO_STR(_inst_nbits, _addr_nbits, _data_nbits) \ (SNOR_PROTO_INST(_inst_nbits) | \ SNOR_PROTO_ADDR(_addr_nbits) | \ SNOR_PROTO_DATA(_data_nbits)) #define SNOR_PROTO_DTR(_inst_nbits, _addr_nbits, _data_nbits) \ (SNOR_PROTO_IS_DTR | \ SNOR_PROTO_STR(_inst_nbits, _addr_nbits, _data_nbits)) enum spi_nor_protocol { SNOR_PROTO_1_1_1 = SNOR_PROTO_STR(1, 1, 1), SNOR_PROTO_1_1_2 = SNOR_PROTO_STR(1, 1, 2), SNOR_PROTO_1_1_4 = SNOR_PROTO_STR(1, 1, 4), SNOR_PROTO_1_1_8 = SNOR_PROTO_STR(1, 1, 8), SNOR_PROTO_1_2_2 = SNOR_PROTO_STR(1, 2, 2), SNOR_PROTO_1_4_4 = SNOR_PROTO_STR(1, 4, 4), SNOR_PROTO_1_8_8 = SNOR_PROTO_STR(1, 8, 8), SNOR_PROTO_2_2_2 = SNOR_PROTO_STR(2, 2, 2), SNOR_PROTO_4_4_4 = SNOR_PROTO_STR(4, 4, 4), SNOR_PROTO_8_8_8 = SNOR_PROTO_STR(8, 8, 8), SNOR_PROTO_1_1_1_DTR = SNOR_PROTO_DTR(1, 1, 1), SNOR_PROTO_1_2_2_DTR = SNOR_PROTO_DTR(1, 2, 2), SNOR_PROTO_1_4_4_DTR = SNOR_PROTO_DTR(1, 4, 4), SNOR_PROTO_1_8_8_DTR = SNOR_PROTO_DTR(1, 8, 8), SNOR_PROTO_8_8_8_DTR = SNOR_PROTO_DTR(8, 8, 8), }; static inline bool spi_nor_protocol_is_dtr(enum spi_nor_protocol proto) { return !!(proto & SNOR_PROTO_IS_DTR); } static inline u8 spi_nor_get_protocol_inst_nbits(enum spi_nor_protocol proto) { return ((unsigned long)(proto & SNOR_PROTO_INST_MASK)) >> SNOR_PROTO_INST_SHIFT; } static inline u8 spi_nor_get_protocol_addr_nbits(enum spi_nor_protocol proto) { return ((unsigned long)(proto & SNOR_PROTO_ADDR_MASK)) >> SNOR_PROTO_ADDR_SHIFT; } static inline u8 spi_nor_get_protocol_data_nbits(enum spi_nor_protocol proto) { return ((unsigned long)(proto & SNOR_PROTO_DATA_MASK)) >> SNOR_PROTO_DATA_SHIFT; } static inline u8 spi_nor_get_protocol_width(enum spi_nor_protocol proto) { return spi_nor_get_protocol_data_nbits(proto); } /** * struct spi_nor_hwcaps - Structure for describing the hardware capabilies * supported by the SPI controller (bus master). * @mask: the bitmask listing all the supported hw capabilies */ struct spi_nor_hwcaps { u32 mask; }; /* *(Fast) Read capabilities. * MUST be ordered by priority: the higher bit position, the higher priority. * As a matter of performances, it is relevant to use Octal SPI protocols first, * then Quad SPI protocols before Dual SPI protocols, Fast Read and lastly * (Slow) Read. */ #define SNOR_HWCAPS_READ_MASK GENMASK(15, 0) #define SNOR_HWCAPS_READ BIT(0) #define SNOR_HWCAPS_READ_FAST BIT(1) #define SNOR_HWCAPS_READ_1_1_1_DTR BIT(2) #define SNOR_HWCAPS_READ_DUAL GENMASK(6, 3) #define SNOR_HWCAPS_READ_1_1_2 BIT(3) #define SNOR_HWCAPS_READ_1_2_2 BIT(4) #define SNOR_HWCAPS_READ_2_2_2 BIT(5) #define SNOR_HWCAPS_READ_1_2_2_DTR BIT(6) #define SNOR_HWCAPS_READ_QUAD GENMASK(10, 7) #define SNOR_HWCAPS_READ_1_1_4 BIT(7) #define SNOR_HWCAPS_READ_1_4_4 BIT(8) #define SNOR_HWCAPS_READ_4_4_4 BIT(9) #define SNOR_HWCAPS_READ_1_4_4_DTR BIT(10) #define SNOR_HWCAPS_READ_OCTAL GENMASK(15, 11) #define SNOR_HWCAPS_READ_1_1_8 BIT(11) #define SNOR_HWCAPS_READ_1_8_8 BIT(12) #define SNOR_HWCAPS_READ_8_8_8 BIT(13) #define SNOR_HWCAPS_READ_1_8_8_DTR BIT(14) #define SNOR_HWCAPS_READ_8_8_8_DTR BIT(15) /* * Page Program capabilities. * MUST be ordered by priority: the higher bit position, the higher priority. * Like (Fast) Read capabilities, Octal/Quad SPI protocols are preferred to the * legacy SPI 1-1-1 protocol. * Note that Dual Page Programs are not supported because there is no existing * JEDEC/SFDP standard to define them. Also at this moment no SPI flash memory * implements such commands. */ #define SNOR_HWCAPS_PP_MASK GENMASK(23, 16) #define SNOR_HWCAPS_PP BIT(16) #define SNOR_HWCAPS_PP_QUAD GENMASK(19, 17) #define SNOR_HWCAPS_PP_1_1_4 BIT(17) #define SNOR_HWCAPS_PP_1_4_4 BIT(18) #define SNOR_HWCAPS_PP_4_4_4 BIT(19) #define SNOR_HWCAPS_PP_OCTAL GENMASK(23, 20) #define SNOR_HWCAPS_PP_1_1_8 BIT(20) #define SNOR_HWCAPS_PP_1_8_8 BIT(21) #define SNOR_HWCAPS_PP_8_8_8 BIT(22) #define SNOR_HWCAPS_PP_8_8_8_DTR BIT(23) #define SNOR_HWCAPS_X_X_X (SNOR_HWCAPS_READ_2_2_2 | \ SNOR_HWCAPS_READ_4_4_4 | \ SNOR_HWCAPS_READ_8_8_8 | \ SNOR_HWCAPS_PP_4_4_4 | \ SNOR_HWCAPS_PP_8_8_8) #define SNOR_HWCAPS_X_X_X_DTR (SNOR_HWCAPS_READ_8_8_8_DTR | \ SNOR_HWCAPS_PP_8_8_8_DTR) #define SNOR_HWCAPS_DTR (SNOR_HWCAPS_READ_1_1_1_DTR | \ SNOR_HWCAPS_READ_1_2_2_DTR | \ SNOR_HWCAPS_READ_1_4_4_DTR | \ SNOR_HWCAPS_READ_1_8_8_DTR | \ SNOR_HWCAPS_READ_8_8_8_DTR) #define SNOR_HWCAPS_ALL (SNOR_HWCAPS_READ_MASK | \ SNOR_HWCAPS_PP_MASK) /* Forward declaration that is used in 'struct spi_nor_controller_ops' */ struct spi_nor; /** * struct spi_nor_controller_ops - SPI NOR controller driver specific * operations. * @prepare: [OPTIONAL] do some preparations for the * read/write/erase/lock/unlock operations. * @unprepare: [OPTIONAL] do some post work after the * read/write/erase/lock/unlock operations. * @read_reg: read out the register. * @write_reg: write data to the register. * @read: read data from the SPI NOR. * @write: write data to the SPI NOR. * @erase: erase a sector of the SPI NOR at the offset @offs; if * not provided by the driver, SPI NOR will send the erase * opcode via write_reg(). */ struct spi_nor_controller_ops { int (*prepare)(struct spi_nor *nor); void (*unprepare)(struct spi_nor *nor); int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, size_t len); int (*write_reg)(struct spi_nor *nor, u8 opcode, const u8 *buf, size_t len); ssize_t (*read)(struct spi_nor *nor, loff_t from, size_t len, u8 *buf); ssize_t (*write)(struct spi_nor *nor, loff_t to, size_t len, const u8 *buf); int (*erase)(struct spi_nor *nor, loff_t offs); }; /** * enum spi_nor_cmd_ext - describes the command opcode extension in DTR mode * @SPI_NOR_EXT_NONE: no extension. This is the default, and is used in Legacy * SPI mode * @SPI_NOR_EXT_REPEAT: the extension is same as the opcode * @SPI_NOR_EXT_INVERT: the extension is the bitwise inverse of the opcode * @SPI_NOR_EXT_HEX: the extension is any hex value. The command and opcode * combine to form a 16-bit opcode. */ enum spi_nor_cmd_ext { SPI_NOR_EXT_NONE = 0, SPI_NOR_EXT_REPEAT, SPI_NOR_EXT_INVERT, SPI_NOR_EXT_HEX, }; /* * Forward declarations that are used internally by the core and manufacturer * drivers. */ struct flash_info; struct spi_nor_manufacturer; struct spi_nor_flash_parameter; /** * struct spi_nor - Structure for defining the SPI NOR layer * @mtd: an mtd_info structure * @lock: the lock for the read/write/erase/lock/unlock operations * @rww: Read-While-Write (RWW) sync lock * @rww.wait: wait queue for the RWW sync * @rww.ongoing_io: the bus is busy * @rww.ongoing_rd: a read is ongoing on the chip * @rww.ongoing_pe: a program/erase is ongoing on the chip * @rww.used_banks: bitmap of the banks in use * @dev: pointer to an SPI device or an SPI NOR controller device * @spimem: pointer to the SPI memory device * @bouncebuf: bounce buffer used when the buffer passed by the MTD * layer is not DMA-able * @bouncebuf_size: size of the bounce buffer * @id: The flash's ID bytes. Always contains * SPI_NOR_MAX_ID_LEN bytes. * @info: SPI NOR part JEDEC MFR ID and other info * @manufacturer: SPI NOR manufacturer * @addr_nbytes: number of address bytes * @erase_opcode: the opcode for erasing a sector * @read_opcode: the read opcode * @read_dummy: the dummy needed by the read operation * @program_opcode: the program opcode * @sst_write_second: used by the SST write operation * @flags: flag options for the current SPI NOR (SNOR_F_*) * @cmd_ext_type: the command opcode extension type for DTR mode. * @read_proto: the SPI protocol for read operations * @write_proto: the SPI protocol for write operations * @reg_proto: the SPI protocol for read_reg/write_reg/erase operations * @sfdp: the SFDP data of the flash * @debugfs_root: pointer to the debugfs directory * @controller_ops: SPI NOR controller driver specific operations. * @params: [FLASH-SPECIFIC] SPI NOR flash parameters and settings. * The structure includes legacy flash parameters and * settings that can be overwritten by the spi_nor_fixups * hooks, or dynamically when parsing the SFDP tables. * @dirmap: pointers to struct spi_mem_dirmap_desc for reads/writes. * @priv: pointer to the private data */ struct spi_nor { struct mtd_info mtd; struct mutex lock; struct spi_nor_rww { wait_queue_head_t wait; bool ongoing_io; bool ongoing_rd; bool ongoing_pe; unsigned int used_banks; } rww; struct device *dev; struct spi_mem *spimem; u8 *bouncebuf; size_t bouncebuf_size; u8 *id; const struct flash_info *info; const struct spi_nor_manufacturer *manufacturer; u8 addr_nbytes; u8 erase_opcode; u8 read_opcode; u8 read_dummy; u8 program_opcode; enum spi_nor_protocol read_proto; enum spi_nor_protocol write_proto; enum spi_nor_protocol reg_proto; bool sst_write_second; u32 flags; enum spi_nor_cmd_ext cmd_ext_type; struct sfdp *sfdp; struct dentry *debugfs_root; const struct spi_nor_controller_ops *controller_ops; struct spi_nor_flash_parameter *params; struct { struct spi_mem_dirmap_desc *rdesc; struct spi_mem_dirmap_desc *wdesc; } dirmap; void *priv; }; static inline void spi_nor_set_flash_node(struct spi_nor *nor, struct device_node *np) { mtd_set_of_node(&nor->mtd, np); } static inline struct device_node *spi_nor_get_flash_node(struct spi_nor *nor) { return mtd_get_of_node(&nor->mtd); } /** * spi_nor_scan() - scan the SPI NOR * @nor: the spi_nor structure * @name: the chip type name * @hwcaps: the hardware capabilities supported by the controller driver * * The drivers can use this function to scan the SPI NOR. * In the scanning, it will try to get all the necessary information to * fill the mtd_info{} and the spi_nor{}. * * The chip type name can be provided through the @name parameter. * * Return: 0 for success, others for failure. */ int spi_nor_scan(struct spi_nor *nor, const char *name, const struct spi_nor_hwcaps *hwcaps); #endif
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