1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (C) 2014 Freescale Semiconductor, Inc.
6 #ifndef __LINUX_MTD_SPI_NOR_H
7 #define __LINUX_MTD_SPI_NOR_H
9 #include <linux/bitops.h>
10 #include <linux/mtd/cfi.h>
11 #include <linux/mtd/mtd.h>
12 #include <linux/spi/spi-mem.h>
15 * Note on opcode nomenclature: some opcodes have a format like
16 * SPINOR_OP_FUNCTION{4,}_x_y_z. The numbers x, y, and z stand for the number
17 * of I/O lines used for the opcode, address, and data (respectively). The
18 * FUNCTION has an optional suffix of '4', to represent an opcode which
19 * requires a 4-byte (32-bit) address.
23 #define SPINOR_OP_WRDI 0x04 /* Write disable */
24 #define SPINOR_OP_WREN 0x06 /* Write enable */
25 #define SPINOR_OP_RDSR 0x05 /* Read status register */
26 #define SPINOR_OP_WRSR 0x01 /* Write status register 1 byte */
27 #define SPINOR_OP_RDSR2 0x3f /* Read status register 2 */
28 #define SPINOR_OP_WRSR2 0x3e /* Write status register 2 */
29 #define SPINOR_OP_READ 0x03 /* Read data bytes (low frequency) */
30 #define SPINOR_OP_READ_FAST 0x0b /* Read data bytes (high frequency) */
31 #define SPINOR_OP_READ_1_1_2 0x3b /* Read data bytes (Dual Output SPI) */
32 #define SPINOR_OP_READ_1_2_2 0xbb /* Read data bytes (Dual I/O SPI) */
33 #define SPINOR_OP_READ_1_1_4 0x6b /* Read data bytes (Quad Output SPI) */
34 #define SPINOR_OP_READ_1_4_4 0xeb /* Read data bytes (Quad I/O SPI) */
35 #define SPINOR_OP_READ_1_1_8 0x8b /* Read data bytes (Octal Output SPI) */
36 #define SPINOR_OP_READ_1_8_8 0xcb /* Read data bytes (Octal I/O SPI) */
37 #define SPINOR_OP_PP 0x02 /* Page program (up to 256 bytes) */
38 #define SPINOR_OP_PP_1_1_4 0x32 /* Quad page program */
39 #define SPINOR_OP_PP_1_4_4 0x38 /* Quad page program */
40 #define SPINOR_OP_PP_1_1_8 0x82 /* Octal page program */
41 #define SPINOR_OP_PP_1_8_8 0xc2 /* Octal page program */
42 #define SPINOR_OP_BE_4K 0x20 /* Erase 4KiB block */
43 #define SPINOR_OP_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips */
44 #define SPINOR_OP_BE_32K 0x52 /* Erase 32KiB block */
45 #define SPINOR_OP_CHIP_ERASE 0xc7 /* Erase whole flash chip */
46 #define SPINOR_OP_SE 0xd8 /* Sector erase (usually 64KiB) */
47 #define SPINOR_OP_RDID 0x9f /* Read JEDEC ID */
48 #define SPINOR_OP_RDSFDP 0x5a /* Read SFDP */
49 #define SPINOR_OP_RDCR 0x35 /* Read configuration register */
50 #define SPINOR_OP_RDFSR 0x70 /* Read flag status register */
51 #define SPINOR_OP_CLFSR 0x50 /* Clear flag status register */
52 #define SPINOR_OP_RDEAR 0xc8 /* Read Extended Address Register */
53 #define SPINOR_OP_WREAR 0xc5 /* Write Extended Address Register */
54 #define SPINOR_OP_SRSTEN 0x66 /* Software Reset Enable */
55 #define SPINOR_OP_SRST 0x99 /* Software Reset */
57 /* 4-byte address opcodes - used on Spansion and some Macronix flashes. */
58 #define SPINOR_OP_READ_4B 0x13 /* Read data bytes (low frequency) */
59 #define SPINOR_OP_READ_FAST_4B 0x0c /* Read data bytes (high frequency) */
60 #define SPINOR_OP_READ_1_1_2_4B 0x3c /* Read data bytes (Dual Output SPI) */
61 #define SPINOR_OP_READ_1_2_2_4B 0xbc /* Read data bytes (Dual I/O SPI) */
62 #define SPINOR_OP_READ_1_1_4_4B 0x6c /* Read data bytes (Quad Output SPI) */
63 #define SPINOR_OP_READ_1_4_4_4B 0xec /* Read data bytes (Quad I/O SPI) */
64 #define SPINOR_OP_READ_1_1_8_4B 0x7c /* Read data bytes (Octal Output SPI) */
65 #define SPINOR_OP_READ_1_8_8_4B 0xcc /* Read data bytes (Octal I/O SPI) */
66 #define SPINOR_OP_PP_4B 0x12 /* Page program (up to 256 bytes) */
67 #define SPINOR_OP_PP_1_1_4_4B 0x34 /* Quad page program */
68 #define SPINOR_OP_PP_1_4_4_4B 0x3e /* Quad page program */
69 #define SPINOR_OP_PP_1_1_8_4B 0x84 /* Octal page program */
70 #define SPINOR_OP_PP_1_8_8_4B 0x8e /* Octal page program */
71 #define SPINOR_OP_BE_4K_4B 0x21 /* Erase 4KiB block */
72 #define SPINOR_OP_BE_32K_4B 0x5c /* Erase 32KiB block */
73 #define SPINOR_OP_SE_4B 0xdc /* Sector erase (usually 64KiB) */
75 /* Double Transfer Rate opcodes - defined in JEDEC JESD216B. */
76 #define SPINOR_OP_READ_1_1_1_DTR 0x0d
77 #define SPINOR_OP_READ_1_2_2_DTR 0xbd
78 #define SPINOR_OP_READ_1_4_4_DTR 0xed
80 #define SPINOR_OP_READ_1_1_1_DTR_4B 0x0e
81 #define SPINOR_OP_READ_1_2_2_DTR_4B 0xbe
82 #define SPINOR_OP_READ_1_4_4_DTR_4B 0xee
84 /* Used for SST flashes only. */
85 #define SPINOR_OP_BP 0x02 /* Byte program */
86 #define SPINOR_OP_AAI_WP 0xad /* Auto address increment word program */
88 /* Used for S3AN flashes only */
89 #define SPINOR_OP_XSE 0x50 /* Sector erase */
90 #define SPINOR_OP_XPP 0x82 /* Page program */
91 #define SPINOR_OP_XRDSR 0xd7 /* Read status register */
93 #define XSR_PAGESIZE BIT(0) /* Page size in Po2 or Linear */
94 #define XSR_RDY BIT(7) /* Ready */
97 /* Used for Macronix and Winbond flashes. */
98 #define SPINOR_OP_EN4B 0xb7 /* Enter 4-byte mode */
99 #define SPINOR_OP_EX4B 0xe9 /* Exit 4-byte mode */
101 /* Used for Spansion flashes only. */
102 #define SPINOR_OP_BRWR 0x17 /* Bank register write */
103 #define SPINOR_OP_CLSR 0x30 /* Clear status register 1 */
105 /* Used for Micron flashes only. */
106 #define SPINOR_OP_RD_EVCR 0x65 /* Read EVCR register */
107 #define SPINOR_OP_WD_EVCR 0x61 /* Write EVCR register */
109 /* Status Register bits. */
110 #define SR_WIP BIT(0) /* Write in progress */
111 #define SR_WEL BIT(1) /* Write enable latch */
112 /* meaning of other SR_* bits may differ between vendors */
113 #define SR_BP0 BIT(2) /* Block protect 0 */
114 #define SR_BP1 BIT(3) /* Block protect 1 */
115 #define SR_BP2 BIT(4) /* Block protect 2 */
116 #define SR_BP3 BIT(5) /* Block protect 3 */
117 #define SR_TB_BIT5 BIT(5) /* Top/Bottom protect */
118 #define SR_BP3_BIT6 BIT(6) /* Block protect 3 */
119 #define SR_TB_BIT6 BIT(6) /* Top/Bottom protect */
120 #define SR_SRWD BIT(7) /* SR write protect */
121 /* Spansion/Cypress specific status bits */
122 #define SR_E_ERR BIT(5)
123 #define SR_P_ERR BIT(6)
125 #define SR1_QUAD_EN_BIT6 BIT(6)
127 #define SR_BP_SHIFT 2
129 /* Enhanced Volatile Configuration Register bits */
130 #define EVCR_QUAD_EN_MICRON BIT(7) /* Micron Quad I/O */
132 /* Flag Status Register bits */
133 #define FSR_READY BIT(7) /* Device status, 0 = Busy, 1 = Ready */
134 #define FSR_E_ERR BIT(5) /* Erase operation status */
135 #define FSR_P_ERR BIT(4) /* Program operation status */
136 #define FSR_PT_ERR BIT(1) /* Protection error bit */
138 /* Status Register 2 bits. */
139 #define SR2_QUAD_EN_BIT1 BIT(1)
140 #define SR2_QUAD_EN_BIT7 BIT(7)
142 /* Supported SPI protocols */
143 #define SNOR_PROTO_INST_MASK GENMASK(23, 16)
144 #define SNOR_PROTO_INST_SHIFT 16
145 #define SNOR_PROTO_INST(_nbits) \
146 ((((unsigned long)(_nbits)) << SNOR_PROTO_INST_SHIFT) & \
147 SNOR_PROTO_INST_MASK)
149 #define SNOR_PROTO_ADDR_MASK GENMASK(15, 8)
150 #define SNOR_PROTO_ADDR_SHIFT 8
151 #define SNOR_PROTO_ADDR(_nbits) \
152 ((((unsigned long)(_nbits)) << SNOR_PROTO_ADDR_SHIFT) & \
153 SNOR_PROTO_ADDR_MASK)
155 #define SNOR_PROTO_DATA_MASK GENMASK(7, 0)
156 #define SNOR_PROTO_DATA_SHIFT 0
157 #define SNOR_PROTO_DATA(_nbits) \
158 ((((unsigned long)(_nbits)) << SNOR_PROTO_DATA_SHIFT) & \
159 SNOR_PROTO_DATA_MASK)
161 #define SNOR_PROTO_IS_DTR BIT(24) /* Double Transfer Rate */
163 #define SNOR_PROTO_STR(_inst_nbits, _addr_nbits, _data_nbits) \
164 (SNOR_PROTO_INST(_inst_nbits) | \
165 SNOR_PROTO_ADDR(_addr_nbits) | \
166 SNOR_PROTO_DATA(_data_nbits))
167 #define SNOR_PROTO_DTR(_inst_nbits, _addr_nbits, _data_nbits) \
168 (SNOR_PROTO_IS_DTR | \
169 SNOR_PROTO_STR(_inst_nbits, _addr_nbits, _data_nbits))
171 enum spi_nor_protocol {
172 SNOR_PROTO_1_1_1 = SNOR_PROTO_STR(1, 1, 1),
173 SNOR_PROTO_1_1_2 = SNOR_PROTO_STR(1, 1, 2),
174 SNOR_PROTO_1_1_4 = SNOR_PROTO_STR(1, 1, 4),
175 SNOR_PROTO_1_1_8 = SNOR_PROTO_STR(1, 1, 8),
176 SNOR_PROTO_1_2_2 = SNOR_PROTO_STR(1, 2, 2),
177 SNOR_PROTO_1_4_4 = SNOR_PROTO_STR(1, 4, 4),
178 SNOR_PROTO_1_8_8 = SNOR_PROTO_STR(1, 8, 8),
179 SNOR_PROTO_2_2_2 = SNOR_PROTO_STR(2, 2, 2),
180 SNOR_PROTO_4_4_4 = SNOR_PROTO_STR(4, 4, 4),
181 SNOR_PROTO_8_8_8 = SNOR_PROTO_STR(8, 8, 8),
183 SNOR_PROTO_1_1_1_DTR = SNOR_PROTO_DTR(1, 1, 1),
184 SNOR_PROTO_1_2_2_DTR = SNOR_PROTO_DTR(1, 2, 2),
185 SNOR_PROTO_1_4_4_DTR = SNOR_PROTO_DTR(1, 4, 4),
186 SNOR_PROTO_1_8_8_DTR = SNOR_PROTO_DTR(1, 8, 8),
187 SNOR_PROTO_8_8_8_DTR = SNOR_PROTO_DTR(8, 8, 8),
190 static inline bool spi_nor_protocol_is_dtr(enum spi_nor_protocol proto)
192 return !!(proto & SNOR_PROTO_IS_DTR);
195 static inline u8 spi_nor_get_protocol_inst_nbits(enum spi_nor_protocol proto)
197 return ((unsigned long)(proto & SNOR_PROTO_INST_MASK)) >>
198 SNOR_PROTO_INST_SHIFT;
201 static inline u8 spi_nor_get_protocol_addr_nbits(enum spi_nor_protocol proto)
203 return ((unsigned long)(proto & SNOR_PROTO_ADDR_MASK)) >>
204 SNOR_PROTO_ADDR_SHIFT;
207 static inline u8 spi_nor_get_protocol_data_nbits(enum spi_nor_protocol proto)
209 return ((unsigned long)(proto & SNOR_PROTO_DATA_MASK)) >>
210 SNOR_PROTO_DATA_SHIFT;
213 static inline u8 spi_nor_get_protocol_width(enum spi_nor_protocol proto)
215 return spi_nor_get_protocol_data_nbits(proto);
219 * struct spi_nor_hwcaps - Structure for describing the hardware capabilies
220 * supported by the SPI controller (bus master).
221 * @mask: the bitmask listing all the supported hw capabilies
223 struct spi_nor_hwcaps {
228 *(Fast) Read capabilities.
229 * MUST be ordered by priority: the higher bit position, the higher priority.
230 * As a matter of performances, it is relevant to use Octal SPI protocols first,
231 * then Quad SPI protocols before Dual SPI protocols, Fast Read and lastly
234 #define SNOR_HWCAPS_READ_MASK GENMASK(15, 0)
235 #define SNOR_HWCAPS_READ BIT(0)
236 #define SNOR_HWCAPS_READ_FAST BIT(1)
237 #define SNOR_HWCAPS_READ_1_1_1_DTR BIT(2)
239 #define SNOR_HWCAPS_READ_DUAL GENMASK(6, 3)
240 #define SNOR_HWCAPS_READ_1_1_2 BIT(3)
241 #define SNOR_HWCAPS_READ_1_2_2 BIT(4)
242 #define SNOR_HWCAPS_READ_2_2_2 BIT(5)
243 #define SNOR_HWCAPS_READ_1_2_2_DTR BIT(6)
245 #define SNOR_HWCAPS_READ_QUAD GENMASK(10, 7)
246 #define SNOR_HWCAPS_READ_1_1_4 BIT(7)
247 #define SNOR_HWCAPS_READ_1_4_4 BIT(8)
248 #define SNOR_HWCAPS_READ_4_4_4 BIT(9)
249 #define SNOR_HWCAPS_READ_1_4_4_DTR BIT(10)
251 #define SNOR_HWCAPS_READ_OCTAL GENMASK(15, 11)
252 #define SNOR_HWCAPS_READ_1_1_8 BIT(11)
253 #define SNOR_HWCAPS_READ_1_8_8 BIT(12)
254 #define SNOR_HWCAPS_READ_8_8_8 BIT(13)
255 #define SNOR_HWCAPS_READ_1_8_8_DTR BIT(14)
256 #define SNOR_HWCAPS_READ_8_8_8_DTR BIT(15)
259 * Page Program capabilities.
260 * MUST be ordered by priority: the higher bit position, the higher priority.
261 * Like (Fast) Read capabilities, Octal/Quad SPI protocols are preferred to the
262 * legacy SPI 1-1-1 protocol.
263 * Note that Dual Page Programs are not supported because there is no existing
264 * JEDEC/SFDP standard to define them. Also at this moment no SPI flash memory
265 * implements such commands.
267 #define SNOR_HWCAPS_PP_MASK GENMASK(23, 16)
268 #define SNOR_HWCAPS_PP BIT(16)
270 #define SNOR_HWCAPS_PP_QUAD GENMASK(19, 17)
271 #define SNOR_HWCAPS_PP_1_1_4 BIT(17)
272 #define SNOR_HWCAPS_PP_1_4_4 BIT(18)
273 #define SNOR_HWCAPS_PP_4_4_4 BIT(19)
275 #define SNOR_HWCAPS_PP_OCTAL GENMASK(23, 20)
276 #define SNOR_HWCAPS_PP_1_1_8 BIT(20)
277 #define SNOR_HWCAPS_PP_1_8_8 BIT(21)
278 #define SNOR_HWCAPS_PP_8_8_8 BIT(22)
279 #define SNOR_HWCAPS_PP_8_8_8_DTR BIT(23)
281 #define SNOR_HWCAPS_X_X_X (SNOR_HWCAPS_READ_2_2_2 | \
282 SNOR_HWCAPS_READ_4_4_4 | \
283 SNOR_HWCAPS_READ_8_8_8 | \
284 SNOR_HWCAPS_PP_4_4_4 | \
285 SNOR_HWCAPS_PP_8_8_8)
287 #define SNOR_HWCAPS_X_X_X_DTR (SNOR_HWCAPS_READ_8_8_8_DTR | \
288 SNOR_HWCAPS_PP_8_8_8_DTR)
290 #define SNOR_HWCAPS_DTR (SNOR_HWCAPS_READ_1_1_1_DTR | \
291 SNOR_HWCAPS_READ_1_2_2_DTR | \
292 SNOR_HWCAPS_READ_1_4_4_DTR | \
293 SNOR_HWCAPS_READ_1_8_8_DTR | \
294 SNOR_HWCAPS_READ_8_8_8_DTR)
296 #define SNOR_HWCAPS_ALL (SNOR_HWCAPS_READ_MASK | \
299 /* Forward declaration that is used in 'struct spi_nor_controller_ops' */
303 * struct spi_nor_controller_ops - SPI NOR controller driver specific
305 * @prepare: [OPTIONAL] do some preparations for the
306 * read/write/erase/lock/unlock operations.
307 * @unprepare: [OPTIONAL] do some post work after the
308 * read/write/erase/lock/unlock operations.
309 * @read_reg: read out the register.
310 * @write_reg: write data to the register.
311 * @read: read data from the SPI NOR.
312 * @write: write data to the SPI NOR.
313 * @erase: erase a sector of the SPI NOR at the offset @offs; if
314 * not provided by the driver, SPI NOR will send the erase
315 * opcode via write_reg().
317 struct spi_nor_controller_ops {
318 int (*prepare)(struct spi_nor *nor);
319 void (*unprepare)(struct spi_nor *nor);
320 int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, size_t len);
321 int (*write_reg)(struct spi_nor *nor, u8 opcode, const u8 *buf,
324 ssize_t (*read)(struct spi_nor *nor, loff_t from, size_t len, u8 *buf);
325 ssize_t (*write)(struct spi_nor *nor, loff_t to, size_t len,
327 int (*erase)(struct spi_nor *nor, loff_t offs);
331 * enum spi_nor_cmd_ext - describes the command opcode extension in DTR mode
332 * @SPI_NOR_EXT_NONE: no extension. This is the default, and is used in Legacy
334 * @SPI_NOR_EXT_REPEAT: the extension is same as the opcode
335 * @SPI_NOR_EXT_INVERT: the extension is the bitwise inverse of the opcode
336 * @SPI_NOR_EXT_HEX: the extension is any hex value. The command and opcode
337 * combine to form a 16-bit opcode.
339 enum spi_nor_cmd_ext {
340 SPI_NOR_EXT_NONE = 0,
347 * Forward declarations that are used internally by the core and manufacturer
351 struct spi_nor_manufacturer;
352 struct spi_nor_flash_parameter;
355 * struct spi_nor - Structure for defining the SPI NOR layer
356 * @mtd: an mtd_info structure
357 * @lock: the lock for the read/write/erase/lock/unlock operations
358 * @dev: pointer to an SPI device or an SPI NOR controller device
359 * @spimem: pointer to the SPI memory device
360 * @bouncebuf: bounce buffer used when the buffer passed by the MTD
361 * layer is not DMA-able
362 * @bouncebuf_size: size of the bounce buffer
363 * @info: SPI NOR part JEDEC MFR ID and other info
364 * @manufacturer: SPI NOR manufacturer
365 * @page_size: the page size of the SPI NOR
366 * @addr_width: number of address bytes
367 * @erase_opcode: the opcode for erasing a sector
368 * @read_opcode: the read opcode
369 * @read_dummy: the dummy needed by the read operation
370 * @program_opcode: the program opcode
371 * @sst_write_second: used by the SST write operation
372 * @flags: flag options for the current SPI NOR (SNOR_F_*)
373 * @cmd_ext_type: the command opcode extension type for DTR mode.
374 * @read_proto: the SPI protocol for read operations
375 * @write_proto: the SPI protocol for write operations
376 * @reg_proto: the SPI protocol for read_reg/write_reg/erase operations
377 * @controller_ops: SPI NOR controller driver specific operations.
378 * @params: [FLASH-SPECIFIC] SPI NOR flash parameters and settings.
379 * The structure includes legacy flash parameters and
380 * settings that can be overwritten by the spi_nor_fixups
381 * hooks, or dynamically when parsing the SFDP tables.
382 * @dirmap: pointers to struct spi_mem_dirmap_desc for reads/writes.
383 * @priv: pointer to the private data
389 struct spi_mem *spimem;
391 size_t bouncebuf_size;
392 const struct flash_info *info;
393 const struct spi_nor_manufacturer *manufacturer;
400 enum spi_nor_protocol read_proto;
401 enum spi_nor_protocol write_proto;
402 enum spi_nor_protocol reg_proto;
403 bool sst_write_second;
405 enum spi_nor_cmd_ext cmd_ext_type;
407 const struct spi_nor_controller_ops *controller_ops;
409 struct spi_nor_flash_parameter *params;
412 struct spi_mem_dirmap_desc *rdesc;
413 struct spi_mem_dirmap_desc *wdesc;
419 static inline void spi_nor_set_flash_node(struct spi_nor *nor,
420 struct device_node *np)
422 mtd_set_of_node(&nor->mtd, np);
425 static inline struct device_node *spi_nor_get_flash_node(struct spi_nor *nor)
427 return mtd_get_of_node(&nor->mtd);
431 * spi_nor_scan() - scan the SPI NOR
432 * @nor: the spi_nor structure
433 * @name: the chip type name
434 * @hwcaps: the hardware capabilities supported by the controller driver
436 * The drivers can use this function to scan the SPI NOR.
437 * In the scanning, it will try to get all the necessary information to
438 * fill the mtd_info{} and the spi_nor{}.
440 * The chip type name can be provided through the @name parameter.
442 * Return: 0 for success, others for failure.
444 int spi_nor_scan(struct spi_nor *nor, const char *name,
445 const struct spi_nor_hwcaps *hwcaps);
448 * spi_nor_restore_addr_mode() - restore the status of SPI NOR
449 * @nor: the spi_nor structure
451 void spi_nor_restore(struct spi_nor *nor);