1d25ce7d2SHaavard Skinnemoen /* 2d25ce7d2SHaavard Skinnemoen * Interface to SPI flash 3d25ce7d2SHaavard Skinnemoen * 4d25ce7d2SHaavard Skinnemoen * Copyright (C) 2008 Atmel Corporation 5d25ce7d2SHaavard Skinnemoen * 6d25ce7d2SHaavard Skinnemoen * See file CREDITS for list of people who contributed to this 7d25ce7d2SHaavard Skinnemoen * project. 8d25ce7d2SHaavard Skinnemoen * 9d25ce7d2SHaavard Skinnemoen * This program is free software; you can redistribute it and/or 10d25ce7d2SHaavard Skinnemoen * modify it under the terms of the GNU General Public License 11d25ce7d2SHaavard Skinnemoen * version 2 as published by the Free Software Foundation. 12d25ce7d2SHaavard Skinnemoen * 13d25ce7d2SHaavard Skinnemoen * This program is distributed in the hope that it will be useful, 14d25ce7d2SHaavard Skinnemoen * but WITHOUT ANY WARRANTY; without even the implied warranty of 15d25ce7d2SHaavard Skinnemoen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16d25ce7d2SHaavard Skinnemoen * GNU General Public License for more details. 17d25ce7d2SHaavard Skinnemoen * 18d25ce7d2SHaavard Skinnemoen * You should have received a copy of the GNU General Public License 19d25ce7d2SHaavard Skinnemoen * along with this program; if not, write to the Free Software 20d25ce7d2SHaavard Skinnemoen * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21d25ce7d2SHaavard Skinnemoen * MA 02111-1307 USA 22d25ce7d2SHaavard Skinnemoen */ 23d25ce7d2SHaavard Skinnemoen #ifndef _SPI_FLASH_H_ 24d25ce7d2SHaavard Skinnemoen #define _SPI_FLASH_H_ 25d25ce7d2SHaavard Skinnemoen 26d25ce7d2SHaavard Skinnemoen #include <spi.h> 27e06ab654SMike Frysinger #include <linux/types.h> 28*32b11273SChristian Riesch #include <linux/compiler.h> 29d25ce7d2SHaavard Skinnemoen 30d25ce7d2SHaavard Skinnemoen struct spi_flash { 31d25ce7d2SHaavard Skinnemoen struct spi_slave *spi; 32d25ce7d2SHaavard Skinnemoen 33d25ce7d2SHaavard Skinnemoen const char *name; 34d25ce7d2SHaavard Skinnemoen 35d4aa5009SMike Frysinger /* Total flash size */ 36d25ce7d2SHaavard Skinnemoen u32 size; 37d4aa5009SMike Frysinger /* Write (page) size */ 38d4aa5009SMike Frysinger u32 page_size; 39d4aa5009SMike Frysinger /* Erase (sector) size */ 404e6a5158SRichard Retanubun u32 sector_size; 414e6a5158SRichard Retanubun 42d25ce7d2SHaavard Skinnemoen int (*read)(struct spi_flash *flash, u32 offset, 43d25ce7d2SHaavard Skinnemoen size_t len, void *buf); 44d25ce7d2SHaavard Skinnemoen int (*write)(struct spi_flash *flash, u32 offset, 45d25ce7d2SHaavard Skinnemoen size_t len, const void *buf); 46d25ce7d2SHaavard Skinnemoen int (*erase)(struct spi_flash *flash, u32 offset, 47d25ce7d2SHaavard Skinnemoen size_t len); 48d25ce7d2SHaavard Skinnemoen }; 49d25ce7d2SHaavard Skinnemoen 50d25ce7d2SHaavard Skinnemoen struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, 51d25ce7d2SHaavard Skinnemoen unsigned int max_hz, unsigned int spi_mode); 52d25ce7d2SHaavard Skinnemoen void spi_flash_free(struct spi_flash *flash); 53d25ce7d2SHaavard Skinnemoen 54d25ce7d2SHaavard Skinnemoen static inline int spi_flash_read(struct spi_flash *flash, u32 offset, 55d25ce7d2SHaavard Skinnemoen size_t len, void *buf) 56d25ce7d2SHaavard Skinnemoen { 57d25ce7d2SHaavard Skinnemoen return flash->read(flash, offset, len, buf); 58d25ce7d2SHaavard Skinnemoen } 59d25ce7d2SHaavard Skinnemoen 60d25ce7d2SHaavard Skinnemoen static inline int spi_flash_write(struct spi_flash *flash, u32 offset, 61d25ce7d2SHaavard Skinnemoen size_t len, const void *buf) 62d25ce7d2SHaavard Skinnemoen { 63d25ce7d2SHaavard Skinnemoen return flash->write(flash, offset, len, buf); 64d25ce7d2SHaavard Skinnemoen } 65d25ce7d2SHaavard Skinnemoen 66d25ce7d2SHaavard Skinnemoen static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, 67d25ce7d2SHaavard Skinnemoen size_t len) 68d25ce7d2SHaavard Skinnemoen { 69d25ce7d2SHaavard Skinnemoen return flash->erase(flash, offset, len); 70d25ce7d2SHaavard Skinnemoen } 71d25ce7d2SHaavard Skinnemoen 72*32b11273SChristian Riesch void spi_boot(void) __noreturn; 73*32b11273SChristian Riesch 74d25ce7d2SHaavard Skinnemoen #endif /* _SPI_FLASH_H_ */ 75