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