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>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
|
|
* 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_ */
|