diff options
author | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-05-16 11:10:33 +0200 |
---|---|---|
committer | Wolfgang Denk <wd@denx.de> | 2008-06-03 20:31:34 +0200 |
commit | d25ce7d24cc0f93881559f4009175ea305af65e8 (patch) | |
tree | 5f06370563f9a19fa0d0d266035d136e7688b487 /include | |
parent | 60445cb5c3eb77ed1a07f2d908eef09174483698 (diff) | |
download | u-boot-imx-d25ce7d24cc0f93881559f4009175ea305af65e8.zip u-boot-imx-d25ce7d24cc0f93881559f4009175ea305af65e8.tar.gz u-boot-imx-d25ce7d24cc0f93881559f4009175ea305af65e8.tar.bz2 |
SPI Flash subsystem
This adds a new SPI flash subsystem.
Currently, only AT45 DataFlash in non-power-of-two mode is supported,
but some preliminary support for other flash types is in place as
well.
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/spi_flash.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/include/spi_flash.h b/include/spi_flash.h new file mode 100644 index 0000000..de4f174 --- /dev/null +++ b/include/spi_flash.h @@ -0,0 +1,70 @@ +/* + * 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 <spi.h> + +struct spi_flash_region { + unsigned int count; + unsigned int size; +}; + +struct spi_flash { + struct spi_slave *spi; + + const char *name; + + u32 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_ */ |