From 1c56d9b1029b344b92bc1cd1acb2fe52ce0c0e2d Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Thu, 10 May 2012 11:27:32 -0700 Subject: Add SPI flash driver This driver is taken from u-boot and adapted to match coreboot. It still contains some hacks and is ICH specific at places. Change-Id: I97dd8096f7db3b62f8f4f4e4d08bdee10d88f689 Signed-off-by: Patrick Georgi Reviewed-on: http://review.coreboot.org/997 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich --- src/drivers/spi/spi_flash_internal.h | 81 ++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 src/drivers/spi/spi_flash_internal.h (limited to 'src/drivers/spi/spi_flash_internal.h') diff --git a/src/drivers/spi/spi_flash_internal.h b/src/drivers/spi/spi_flash_internal.h new file mode 100644 index 0000000000..b895e2b4f3 --- /dev/null +++ b/src/drivers/spi/spi_flash_internal.h @@ -0,0 +1,81 @@ +/* + * 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 CONFIG_SYS_HZ 100 +#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 + +#define CMD_READ_STATUS 0x05 +#define CMD_WRITE_ENABLE 0x06 + +/* 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); + +int spi_flash_cmd_read_slow(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); + +/* + * 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, u8 erase_cmd, + 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); -- cgit v1.2.3