include/spi_flash.h

   1 /*
   2  * Interface to SPI flash
   3  *
   4  * Copyright (C) 2008 Atmel Corporation
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23 #ifndef _SPI_FLASH_H_
  24 #define _SPI_FLASH_H_
  25
  26 #include <spi.h>
  27 #include <linux/types.h>
  28
  29 struct spi_flash {
  30         struct spi_slave *spi;
  31
  32         const char      *name;
  33
  34         u32             size;
  35
  36         u32             sector_size;
  37
  38         int             (*read)(struct spi_flash *flash, u32 offset,
  39                                 size_t len, void *buf);
  40         int             (*write)(struct spi_flash *flash, u32 offset,
  41                                 size_t len, const void *buf);
  42         int             (*erase)(struct spi_flash *flash, u32 offset,
  43                                 size_t len);
  44 };
  45
  46 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  47                 unsigned int max_hz, unsigned int spi_mode);
  48 void spi_flash_free(struct spi_flash *flash);
  49
  50 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
  51                 size_t len, void *buf)
  52 {
  53         return flash->read(flash, offset, len, buf);
  54 }
  55
  56 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
  57                 size_t len, const void *buf)
  58 {
  59         return flash->write(flash, offset, len, buf);
  60 }
  61
  62 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
  63                 size_t len)
  64 {
  65         return flash->erase(flash, offset, len);
  66 }
  67
  68 #endif /* _SPI_FLASH_H_ */