| /* |
| * SPI flash internal definitions |
| * |
| * Copyright (C) 2008 Atmel Corporation |
| */ |
| |
| /* Common parameters -- kind of high, but they should only occur when there |
| * is a problem (and well your system already is broken), so err on the side |
| * of caution in case we're dealing with slower SPI buses and/or processors. |
| */ |
| #define SPI_FLASH_PROG_TIMEOUT (2 * CONFIG_SYS_HZ) |
| #define SPI_FLASH_PAGE_ERASE_TIMEOUT (5 * CONFIG_SYS_HZ) |
| #define SPI_FLASH_SECTOR_ERASE_TIMEOUT (10 * CONFIG_SYS_HZ) |
| |
| /* Common commands */ |
| #define CMD_READ_ID 0x9f |
| |
| #define CMD_READ_ARRAY_SLOW 0x03 |
| #define CMD_READ_ARRAY_FAST 0x0b |
| |
| #define CMD_WRITE_STATUS 0x01 |
| #define CMD_PAGE_PROGRAM 0x02 |
| #define CMD_WRITE_DISABLE 0x04 |
| #define CMD_READ_STATUS 0x05 |
| #define CMD_WRITE_ENABLE 0x06 |
| #define CMD_ERASE_4K 0x20 |
| #define CMD_ERASE_32K 0x52 |
| #define CMD_ERASE_64K 0xd8 |
| #define CMD_ERASE_CHIP 0xc7 |
| |
| /* Common status */ |
| #define STATUS_WIP 0x01 |
| |
| /* Send a single-byte command to the device and read the response */ |
| int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len); |
| |
| /* |
| * Send a multi-byte command to the device and read the response. Used |
| * for flash array reads, etc. |
| */ |
| int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, |
| size_t cmd_len, void *data, size_t data_len); |
| |
| int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, |
| size_t len, void *data); |
| |
| /* |
| * Send a multi-byte command to the device followed by (optional) |
| * data. Used for programming the flash array, etc. |
| */ |
| int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, |
| const void *data, size_t data_len); |
| |
| /* |
| * Write the requested data out breaking it up into multiple write |
| * commands as needed per the write size. |
| */ |
| int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset, |
| size_t len, const void *buf); |
| |
| /* |
| * Enable writing on the SPI flash. |
| */ |
| static inline int spi_flash_cmd_write_enable(struct spi_flash *flash) |
| { |
| return spi_flash_cmd(flash->spi, CMD_WRITE_ENABLE, NULL, 0); |
| } |
| |
| /* |
| * Disable writing on the SPI flash. |
| */ |
| static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) |
| { |
| return spi_flash_cmd(flash->spi, CMD_WRITE_DISABLE, NULL, 0); |
| } |
| |
| /* Program the status register. */ |
| int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); |
| |
| /* |
| * Same as spi_flash_cmd_read() except it also claims/releases the SPI |
| * bus. Used as common part of the ->read() operation. |
| */ |
| int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, |
| size_t cmd_len, void *data, size_t data_len); |
| |
| /* Send a command to the device and wait for some bit to clear itself. */ |
| int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout, |
| u8 cmd, u8 poll_bit); |
| |
| /* |
| * Send the read status command to the device and wait for the wip |
| * (write-in-progress) bit to clear itself. |
| */ |
| int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout); |
| |
| /* Erase sectors. */ |
| int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len); |
| |
| /* Manufacturer-specific probe functions */ |
| struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode); |
| struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode); |