src/flash/nor/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/flash.h>
  25 #include <target/image.h>
  26 #include "../hello.h"
  27
  28
  29 struct faux_flash_bank
  30 {
  31         struct target *target;
  32         uint8_t *memory;
  33         uint32_t start_address;
  34 };
  35
  36 static const int sectorSize = 0x10000;
  37
  38
  39 /* flash bank faux <base> <size> <chip_width> <bus_width> <target#> <driverPath>
  40  */
  41 FLASH_BANK_COMMAND_HANDLER(faux_flash_bank_command)
  42 {
  43         struct faux_flash_bank *info;
  44
  45         if (CMD_ARGC < 6)
  46         {
  47                 LOG_WARNING("incomplete flash_bank faux configuration");
  48                 return ERROR_FLASH_BANK_INVALID;
  49         }
  50
  51         info = malloc(sizeof(struct faux_flash_bank));
  52         if (info == NULL)
  53         {
  54                 LOG_ERROR("no memory for flash bank info");
  55                 return ERROR_FAIL;
  56         }
  57         info->memory = malloc(bank->size);
  58         if (info == NULL)
  59         {
  60                 free(info);
  61                 LOG_ERROR("no memory for flash bank info");
  62                 return ERROR_FAIL;
  63         }
  64         bank->driver_priv = info;
  65
  66         /* Use 0x10000 as a fixed sector size. */
  67         int i = 0;
  68         uint32_t offset = 0;
  69         bank->num_sectors = bank->size/sectorSize;
  70         bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
  71         for (i = 0; i < bank->num_sectors; i++)
  72         {
  73                 bank->sectors[i].offset = offset;
  74                 bank->sectors[i].size = sectorSize;
  75                 offset += bank->sectors[i].size;
  76                 bank->sectors[i].is_erased = -1;
  77                 bank->sectors[i].is_protected = 0;
  78         }
  79
  80         info->target = get_target(CMD_ARGV[5]);
  81         if (info->target == NULL)
  82         {
  83                 LOG_ERROR("target '%s' not defined", CMD_ARGV[5]);
  84                 free(info->memory);
  85                 free(info);
  86                 return ERROR_FAIL;
  87         }
  88         return ERROR_OK;
  89 }
  90
  91 static int faux_erase(struct flash_bank *bank, int first, int last)
  92 {
  93         struct faux_flash_bank *info = bank->driver_priv;
  94         memset(info->memory + first*sectorSize, 0xff, sectorSize*(last-first + 1));
  95         return ERROR_OK;
  96 }
  97
  98 static int faux_protect(struct flash_bank *bank, int set, int first, int last)
  99 {
 100         LOG_USER("set protection sector %d to %d to %s", first, last, set?"on":"off");
 101         return ERROR_OK;
 102 }
 103
 104 static int faux_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 105 {
 106         struct faux_flash_bank *info = bank->driver_priv;
 107         memcpy(info->memory + offset, buffer, count);
 108         return ERROR_OK;
 109 }
 110
 111 static int faux_protect_check(struct flash_bank *bank)
 112 {
 113         return ERROR_OK;
 114 }
 115
 116 static int faux_info(struct flash_bank *bank, char *buf, int buf_size)
 117 {
 118         snprintf(buf, buf_size, "faux flash driver");
 119         return ERROR_OK;
 120 }
 121
 122 static int faux_probe(struct flash_bank *bank)
 123 {
 124         return ERROR_OK;
 125 }
 126
 127 static const struct command_registration faux_command_handlers[] = {
 128         {
 129                 .name = "faux",
 130                 .mode = COMMAND_ANY,
 131                 .help = "faux flash command group",
 132                 .chain = hello_command_handlers,
 133         },
 134         COMMAND_REGISTRATION_DONE
 135 };
 136
 137 struct flash_driver faux_flash = {
 138                 .name = "faux",
 139                 .commands = faux_command_handlers,
 140                 .flash_bank_command = &faux_flash_bank_command,
 141                 .erase = &faux_erase,
 142                 .protect = &faux_protect,
 143                 .write = &faux_write,
 144                 .probe = &faux_probe,
 145                 .auto_probe = &faux_probe,
 146                 .erase_check = &default_flash_blank_check,
 147                 .protect_check = &faux_protect_check,
 148                 .info = &faux_info
 149         };