2 * Common SPI flash Interface
4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * version 2 as published by the Free Software Foundation.
19 #include <linux/types.h>
20 #include <linux/compiler.h>
23 #define SECT_4K 1 << 1
24 #define SECT_32K 1 << 2
28 /* Enum list - Full read commands */
31 DUAL_OUTPUT_FAST = 1 << 1,
32 DUAL_IO_FAST = 1 << 2,
33 QUAD_OUTPUT_FAST = 1 << 3,
34 QUAD_IO_FAST = 1 << 4,
36 #define RD_EXTN ARRAY_SLOW | DUAL_OUTPUT_FAST | DUAL_IO_FAST
37 #define RD_FULL RD_EXTN | QUAD_OUTPUT_FAST | QUAD_IO_FAST
39 /* Dual SPI flash memories */
42 SF_DUAL_STACKED_FLASH = 1 << 0,
43 SF_DUAL_PARALLEL_FLASH = 1 << 1,
47 * struct spi_flash_params - SPI/QSPI flash device params structure
49 * @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO])
50 * @jedec: Device jedec ID (0x[1byte_manuf_id][2byte_dev_id])
51 * @ext_jedec: Device ext_jedec ID
52 * @sector_size: Sector size of this device
53 * @nr_sectors: No.of sectors on this device
54 * @e_rd_cmd: Enum list for read commands
55 * @flags: Importent param, for flash specific behaviour
57 struct spi_flash_params {
67 extern const struct spi_flash_params spi_flash_params_table[];
70 * struct spi_flash - SPI flash structure
73 * @name: Name of SPI flash
74 * @dual_flash: Indicates dual flash memories - dual stacked, parallel
75 * @shift: Flash shift useful in dual parallel
76 * @size: Total flash size
77 * @page_size: Write (page) size
78 * @sector_size: Sector size
79 * @erase_size: Erase size
80 * @bank_read_cmd: Bank read cmd
81 * @bank_write_cmd: Bank write cmd
82 * @bank_curr: Current flash bank
83 * @poll_cmd: Poll cmd - for flash erase/program
84 * @erase_cmd: Erase cmd 4K, 32K, 64K
85 * @read_cmd: Read cmd - Array Fast, Extn read and quad read.
86 * @write_cmd: Write cmd - page and quad program.
87 * @dummy_byte: Dummy cycles for read operation.
88 * @memory_map: Address of read-only SPI flash access
89 * @read: Flash read ops: Read len bytes at offset into buf
90 * Supported cmds: Fast Array Read
91 * @write: Flash write ops: Write len bytes from buf into offeset
92 * Supported cmds: Page Program
93 * @erase: Flash erase ops: Erase len bytes from offset
94 * Supported cmds: Sector erase 4K, 32K, 64K
95 * return 0 - Sucess, 1 - Failure
98 struct spi_slave *spi;
107 #ifdef CONFIG_SPI_FLASH_BAR
119 int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);
120 int (*write)(struct spi_flash *flash, u32 offset, size_t len,
122 int (*erase)(struct spi_flash *flash, u32 offset, size_t len);
125 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
126 unsigned int max_hz, unsigned int spi_mode);
129 * Set up a new SPI flash from an fdt node
131 * @param blob Device tree blob
132 * @param slave_node Pointer to this SPI slave node in the device tree
133 * @param spi_node Cached pointer to the SPI interface this node belongs
135 * @return 0 if ok, -1 on error
137 struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
140 void spi_flash_free(struct spi_flash *flash);
142 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
143 size_t len, void *buf)
145 return flash->read(flash, offset, len, buf);
148 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
149 size_t len, const void *buf)
151 return flash->write(flash, offset, len, buf);
154 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
157 return flash->erase(flash, offset, len);
160 void spi_boot(void) __noreturn;
162 #endif /* _SPI_FLASH_H_ */