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>
22 /* No enum list for write commands only QPP */
25 /* Enum list - Full read commands */
28 DUAL_OUTPUT_FAST = 1 << 1,
29 DUAL_IO_FAST = 1 << 2,
30 QUAD_OUTPUT_FAST = 1 << 3,
32 #define RD_EXTN ARRAY_SLOW | DUAL_OUTPUT_FAST | DUAL_IO_FAST
33 #define RD_FULL RD_EXTN | QUAD_OUTPUT_FAST
36 * struct spi_flash - SPI flash structure
39 * @name: Name of SPI flash
40 * @size: Total flash size
41 * @page_size: Write (page) size
42 * @sector_size: Sector size
43 * @erase_size: Erase size
44 * @bank_read_cmd: Bank read cmd
45 * @bank_write_cmd: Bank write cmd
46 * @bank_curr: Current flash bank
47 * @poll_cmd: Poll cmd - for flash erase/program
48 * @erase_cmd: Erase cmd 4K, 32K, 64K
49 * @read_cmd: Read cmd - Array Fast, Extn read and quad read.
50 * @write_cmd: Write cmd - page and quad program.
51 * @memory_map: Address of read-only SPI flash access
52 * @read: Flash read ops: Read len bytes at offset into buf
53 * Supported cmds: Fast Array Read
54 * @write: Flash write ops: Write len bytes from buf into offeset
55 * Supported cmds: Page Program
56 * @erase: Flash erase ops: Erase len bytes from offset
57 * Supported cmds: Sector erase 4K, 32K, 64K
58 * return 0 - Sucess, 1 - Failure
61 struct spi_slave *spi;
68 #ifdef CONFIG_SPI_FLASH_BAR
79 int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);
80 int (*write)(struct spi_flash *flash, u32 offset, size_t len,
82 int (*erase)(struct spi_flash *flash, u32 offset, size_t len);
85 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
86 unsigned int max_hz, unsigned int spi_mode);
89 * Set up a new SPI flash from an fdt node
91 * @param blob Device tree blob
92 * @param slave_node Pointer to this SPI slave node in the device tree
93 * @param spi_node Cached pointer to the SPI interface this node belongs
95 * @return 0 if ok, -1 on error
97 struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
100 void spi_flash_free(struct spi_flash *flash);
102 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
103 size_t len, void *buf)
105 return flash->read(flash, offset, len, buf);
108 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
109 size_t len, const void *buf)
111 return flash->write(flash, offset, len, buf);
114 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
117 return flash->erase(flash, offset, len);
120 void spi_boot(void) __noreturn;
122 #endif /* _SPI_FLASH_H_ */