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/include/spi_flash.h | 91 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 src/include/spi_flash.h (limited to 'src/include/spi_flash.h') diff --git a/src/include/spi_flash.h b/src/include/spi_flash.h new file mode 100644 index 0000000000..2a1dcd4632 --- /dev/null +++ b/src/include/spi_flash.h @@ -0,0 +1,91 @@ +/* + * Interface to SPI flash + * + * Copyright (C) 2008 Atmel Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ +#ifndef _SPI_FLASH_H_ +#define _SPI_FLASH_H_ + +#include +#include +#include +#include + +/** + * container_of - cast a member of a structure out to the containing structure + * @ptr: the pointer to the member. + * @type: the type of the container struct this is embedded in. + * @member: the name of the member within the struct. + * + */ +#define container_of(ptr, type, member) ({ \ + const typeof( ((type *)0)->member ) *__mptr = (ptr); \ + (type *)( (char *)__mptr - offsetof(type,member) );}) + +#define min(a, b) ((a)<(b)?(a):(b)) + +#define CONFIG_ICH_SPI +#ifdef CONFIG_ICH_SPI +#define CONTROLLER_PAGE_LIMIT 64 +#else +/* any number larger than 4K would do, actually */ +#define CONTROLLER_PAGE_LIMIT ((int)(~0U>>1)) +#endif + +struct spi_flash { + struct spi_slave *spi; + + const char *name; + + u32 size; + + u32 sector_size; + + int (*read)(struct spi_flash *flash, u32 offset, + size_t len, void *buf); + int (*write)(struct spi_flash *flash, u32 offset, + size_t len, const void *buf); + int (*erase)(struct spi_flash *flash, u32 offset, + size_t len); +}; + +struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int spi_mode); +void spi_flash_free(struct spi_flash *flash); + +static inline int spi_flash_read(struct spi_flash *flash, u32 offset, + size_t len, void *buf) +{ + return flash->read(flash, offset, len, buf); +} + +static inline int spi_flash_write(struct spi_flash *flash, u32 offset, + size_t len, const void *buf) +{ + return flash->write(flash, offset, len, buf); +} + +static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, + size_t len) +{ + return flash->erase(flash, offset, len); +} + +#endif /* _SPI_FLASH_H_ */ -- cgit v1.2.3