2 * SPI flash internal definitions
4 * Copyright (C) 2008 Atmel Corporation
7 /* Common parameters -- kind of high, but they should only occur when there
8 * is a problem (and well your system already is broken), so err on the side
9 * of caution in case we're dealing with slower SPI buses and/or processors.
11 #define SPI_FLASH_PROG_TIMEOUT (2 * CONFIG_SYS_HZ)
12 #define SPI_FLASH_PAGE_ERASE_TIMEOUT (5 * CONFIG_SYS_HZ)
13 #define SPI_FLASH_SECTOR_ERASE_TIMEOUT (10 * CONFIG_SYS_HZ)
16 #define CMD_READ_ID 0x9f
18 #define CMD_READ_ARRAY_SLOW 0x03
19 #define CMD_READ_ARRAY_FAST 0x0b
20 #define CMD_READ_ARRAY_LEGACY 0xe8
22 #define CMD_READ_STATUS 0x05
23 #define CMD_WRITE_ENABLE 0x06
26 #define STATUS_WIP 0x01
28 /* Send a single-byte command to the device and read the response */
29 int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len);
32 * Send a multi-byte command to the device and read the response. Used
33 * for flash array reads, etc.
35 int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
36 size_t cmd_len, void *data, size_t data_len);
38 int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
39 size_t len, void *data);
42 * Send a multi-byte command to the device followed by (optional)
43 * data. Used for programming the flash array, etc.
45 int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
46 const void *data, size_t data_len);
49 * Enable writing on the SPI flash.
51 static inline int spi_flash_cmd_write_enable(struct spi_flash *flash)
53 return spi_flash_cmd(flash->spi, CMD_WRITE_ENABLE, NULL, 0);
57 * Same as spi_flash_cmd_read() except it also claims/releases the SPI
58 * bus. Used as common part of the ->read() operation.
60 int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
61 size_t cmd_len, void *data, size_t data_len);
63 /* Send a command to the device and wait for some bit to clear itself. */
64 int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
68 * Send the read status command to the device and wait for the wip
69 * (write-in-progress) bit to clear itself.
71 int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout);
74 int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
75 u32 offset, size_t len);
77 /* Manufacturer-specific probe functions */
78 struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
79 struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode);
80 struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode);
81 struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode);
82 struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode);
83 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode);
84 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode);
85 struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode);