src/flash/faux.c

   1 /***************************************************************************
   2  *   Copyright (C) 2009 Øyvind Harboe                                      *
   3  *   oyvind.harboe@zylin.com                                               *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "flash.h"
  25 #include "image.h"
  26
  27
  28 struct faux_flash_bank
  29 {
  30         struct target *target;
  31         uint8_t *memory;
  32         uint32_t start_address;
  33 };
  34
  35 static const int sectorSize = 0x10000;
  36
  37
  38 /* flash bank faux <base> <size> <chip_width> <bus_width> <target#> <driverPath>
  39  */
  40 FLASH_BANK_COMMAND_HANDLER(faux_flash_bank_command)
  41 {
  42         struct faux_flash_bank *info;
  43
  44         if (CMD_ARGC < 6)
  45         {
  46                 LOG_WARNING("incomplete flash_bank faux configuration");
  47                 return ERROR_FLASH_BANK_INVALID;
  48         }
  49
  50         info = malloc(sizeof(struct faux_flash_bank));
  51         if (info == NULL)
  52         {
  53                 LOG_ERROR("no memory for flash bank info");
  54                 return ERROR_FAIL;
  55         }
  56         info->memory = malloc(bank->size);
  57         if (info == NULL)
  58         {
  59                 free(info);
  60                 LOG_ERROR("no memory for flash bank info");
  61                 return ERROR_FAIL;
  62         }
  63         bank->driver_priv = info;
  64
  65         /* Use 0x10000 as a fixed sector size. */
  66         int i = 0;
  67         uint32_t offset = 0;
  68         bank->num_sectors = bank->size/sectorSize;
  69         bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
  70         for (i = 0; i < bank->num_sectors; i++)
  71         {
  72                 bank->sectors[i].offset = offset;
  73                 bank->sectors[i].size = sectorSize;
  74                 offset += bank->sectors[i].size;
  75                 bank->sectors[i].is_erased = -1;
  76                 bank->sectors[i].is_protected = 0;
  77         }
  78
  79         info->target = get_target(CMD_ARGV[5]);
  80         if (info->target == NULL)
  81         {
  82                 LOG_ERROR("target '%s' not defined", CMD_ARGV[5]);
  83                 free(info->memory);
  84                 free(info);
  85                 return ERROR_FAIL;
  86         }
  87         return ERROR_OK;
  88 }
  89
  90 static int faux_erase(struct flash_bank *bank, int first, int last)
  91 {
  92         struct faux_flash_bank *info = bank->driver_priv;
  93         memset(info->memory + first*sectorSize, 0xff, sectorSize*(last-first + 1));
  94         return ERROR_OK;
  95 }
  96
  97 static int faux_protect(struct flash_bank *bank, int set, int first, int last)
  98 {
  99         LOG_USER("set protection sector %d to %d to %s", first, last, set?"on":"off");
 100         return ERROR_OK;
 101 }
 102
 103 static int faux_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 104 {
 105         struct faux_flash_bank *info = bank->driver_priv;
 106         memcpy(info->memory + offset, buffer, count);
 107         return ERROR_OK;
 108 }
 109
 110 static int faux_protect_check(struct flash_bank *bank)
 111 {
 112         return ERROR_OK;
 113 }
 114
 115 static int faux_info(struct flash_bank *bank, char *buf, int buf_size)
 116 {
 117         snprintf(buf, buf_size, "faux flash driver");
 118         return ERROR_OK;
 119 }
 120
 121 static int faux_probe(struct flash_bank *bank)
 122 {
 123         return ERROR_OK;
 124 }
 125
 126 struct flash_driver faux_flash = {
 127                 .name = "faux",
 128                 .flash_bank_command = &faux_flash_bank_command,
 129                 .erase = &faux_erase,
 130                 .protect = &faux_protect,
 131                 .write = &faux_write,
 132                 .probe = &faux_probe,
 133                 .auto_probe = &faux_probe,
 134                 .erase_check = &default_flash_blank_check,
 135                 .protect_check = &faux_protect_check,
 136                 .info = &faux_info
 137         };