diff options
Diffstat (limited to 'u-boot/drivers/mtd/spi/spi_flash_internal.h')
| -rw-r--r-- | u-boot/drivers/mtd/spi/spi_flash_internal.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/u-boot/drivers/mtd/spi/spi_flash_internal.h b/u-boot/drivers/mtd/spi/spi_flash_internal.h new file mode 100644 index 0000000..68dcffb --- /dev/null +++ b/u-boot/drivers/mtd/spi/spi_flash_internal.h @@ -0,0 +1,54 @@ +/* + * 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_READ_ARRAY_LEGACY 0xe8 + +/* 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); + +/* + * 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); + +/* + * 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); + +/* 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); |