mirror of
https://github.com/AsahiLinux/u-boot
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d25ce7d24c
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>
70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
/*
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* Interface to SPI flash
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*
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* Copyright (C) 2008 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _SPI_FLASH_H_
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#define _SPI_FLASH_H_
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#include <spi.h>
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struct spi_flash_region {
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unsigned int count;
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unsigned int size;
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};
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struct spi_flash {
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struct spi_slave *spi;
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const char *name;
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u32 size;
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int (*read)(struct spi_flash *flash, u32 offset,
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size_t len, void *buf);
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int (*write)(struct spi_flash *flash, u32 offset,
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size_t len, const void *buf);
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int (*erase)(struct spi_flash *flash, u32 offset,
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size_t len);
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};
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struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode);
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void spi_flash_free(struct spi_flash *flash);
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static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
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size_t len, void *buf)
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{
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return flash->read(flash, offset, len, buf);
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}
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static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
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size_t len, const void *buf)
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{
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return flash->write(flash, offset, len, buf);
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}
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static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
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size_t len)
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{
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return flash->erase(flash, offset, len);
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}
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#endif /* _SPI_FLASH_H_ */
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