LXR uboot/include/spi

   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#include <linux/compiler.h>
  29
  30struct spi_flash {
  31        struct spi_slave *spi;
  32
  33        const char      *name;
  34
  35        /* Total flash size */
  36        u32             size;
  37        /* Write (page) size */
  38        u32             page_size;
  39        /* Erase (sector) size */
  40        u32             sector_size;
  41
  42        int             (*read)(struct spi_flash *flash, u32 offset,
  43                                size_t len, void *buf);
  44        int             (*write)(struct spi_flash *flash, u32 offset,
  45                                size_t len, const void *buf);
  46        int             (*erase)(struct spi_flash *flash, u32 offset,
  47                                size_t len);
  48};
  49
  50struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
  51                unsigned int max_hz, unsigned int spi_mode);
  52void spi_flash_free(struct spi_flash *flash);
  53
  54static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
  55                size_t len, void *buf)
  56{
  57        return flash->read(flash, offset, len, buf);
  58}
  59
  60static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
  61                size_t len, const void *buf)
  62{
  63        return flash->write(flash, offset, len, buf);
  64}
  65
  66static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
  67                size_t len)
  68{
  69        return flash->erase(flash, offset, len);
  70}
  71
  72void spi_boot(void) __noreturn;
  73
  74#endif /* _SPI_FLASH_H_ */
  75