src/flash/nor/spi.h

   1 /***************************************************************************
   2  *   Copyright (C) 2012 by George Harris                                   *
   3  *   george@luminairecoffee.com                                            *
   4  *                                                                         *
   5  *   Copyright (C) 2010 by Antonio Borneo                                  *
   6  *   borneo.antonio@gmail.com                                              *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  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                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23
  24 /* data structure to maintain flash ids from different vendors */
  25 struct flash_device {
  26         char *name;
  27         uint8_t erase_cmd;
  28         uint8_t chip_erase_cmd;
  29         uint32_t device_id;
  30         uint32_t pagesize;
  31         unsigned long sectorsize;
  32         unsigned long size_in_bytes;
  33 };
  34
  35 #define FLASH_ID(n, es, ces, id, psize, ssize, size) \
  36 {                               \
  37         .name = n,              \
  38         .erase_cmd = es,        \
  39         .chip_erase_cmd = ces,  \
  40         .device_id = id,        \
  41         .pagesize = psize,      \
  42         .sectorsize = ssize,    \
  43         .size_in_bytes = size   \
  44 }
  45
  46 extern struct flash_device flash_devices[];
  47
  48 /* fields in SPI flash status register */
  49 #define SPIFLASH_BSY_BIT                0x00000001 /* WIP Bit of SPI SR on SMI SR */
  50 #define SPIFLASH_WE_BIT                 0x00000002 /* WEL Bit of SPI SR on SMI SR */
  51
  52 /* SPI Flash Commands */
  53 #define SPIFLASH_READ_ID                0x9F /* Read Flash Identification */
  54 #define SPIFLASH_READ_STATUS    0x05 /* Read Status Register */
  55 #define SPIFLASH_WRITE_ENABLE   0x06 /* Write Enable */
  56 #define SPIFLASH_PAGE_PROGRAM   0x02 /* Page Program */
  57 #define SPIFLASH_FAST_READ              0x0B /* Fast Read */
  58 #define SPIFLASH_READ                   0x03 /* Normal Read */