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 static int faux_register_commands(struct command_context_s *cmd_ctx);
  29 static int faux_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank);
  30 static int faux_erase(struct flash_bank_s *bank, int first, int last);
  31 static int faux_protect(struct flash_bank_s *bank, int set, int first, int last);
  32 static int faux_write(struct flash_bank_s *bank, uint8_t *buffer, uint32_t offset, uint32_t count);
  33 static int faux_probe(struct flash_bank_s *bank);
  34 static int faux_protect_check(struct flash_bank_s *bank);
  35 static int faux_info(struct flash_bank_s *bank, char *buf, int buf_size);
  36
  37 flash_driver_t faux_flash =
  38 {
  39         .name = "faux",
  40         .register_commands = faux_register_commands,
  41         .flash_bank_command = faux_flash_bank_command,
  42         .erase = faux_erase,
  43         .protect = faux_protect,
  44         .write = faux_write,
  45         .probe = faux_probe,
  46         .auto_probe = faux_probe,
  47         .erase_check = default_flash_blank_check,
  48         .protect_check = faux_protect_check,
  49         .info = faux_info
  50 };
  51
  52 typedef struct faux_flash_bank_s
  53 {
  54         struct target_s *target;
  55         uint8_t *memory;
  56         uint32_t start_address;
  57 } faux_flash_bank_t;
  58
  59 static const int sectorSize = 0x10000;
  60
  61
  62 /* flash bank faux <base> <size> <chip_width> <bus_width> <target#> <driverPath>
  63  */
  64 static int faux_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank)
  65 {
  66         faux_flash_bank_t *info;
  67
  68         if (argc < 6)
  69         {
  70                 LOG_WARNING("incomplete flash_bank faux configuration");
  71                 return ERROR_FLASH_BANK_INVALID;
  72         }
  73
  74         info = malloc(sizeof(faux_flash_bank_t));
  75         if (info == NULL)
  76         {
  77                 LOG_ERROR("no memory for flash bank info");
  78                 return ERROR_FAIL;
  79         }
  80         info->memory = malloc(bank->size);
  81         if (info == NULL)
  82         {
  83                 free(info);
  84                 LOG_ERROR("no memory for flash bank info");
  85                 return ERROR_FAIL;
  86         }
  87         bank->driver_priv = info;
  88
  89         /* Use 0x10000 as a fixed sector size. */
  90         int i = 0;
  91         uint32_t offset = 0;
  92         bank->num_sectors = bank->size/sectorSize;
  93         bank->sectors = malloc(sizeof(flash_sector_t) * bank->num_sectors);
  94         for (i = 0; i < bank->num_sectors; i++)
  95         {
  96                 bank->sectors[i].offset = offset;
  97                 bank->sectors[i].size = sectorSize;
  98                 offset += bank->sectors[i].size;
  99                 bank->sectors[i].is_erased = -1;
 100                 bank->sectors[i].is_protected = 0;
 101         }
 102
 103         info->target = get_target(args[5]);
 104         if (info->target == NULL)
 105         {
 106                 LOG_ERROR("target '%s' not defined", args[5]);
 107                 free(info->memory);
 108                 free(info);
 109                 return ERROR_FAIL;
 110         }
 111         return ERROR_OK;
 112 }
 113
 114 static int faux_register_commands(struct command_context_s *cmd_ctx)
 115 {
 116         return ERROR_OK;
 117 }
 118
 119 static int faux_erase(struct flash_bank_s *bank, int first, int last)
 120 {
 121         faux_flash_bank_t *info = bank->driver_priv;
 122         memset(info->memory + first*sectorSize, 0xff, sectorSize*(last-first + 1));
 123         return ERROR_OK;
 124 }
 125
 126 static int faux_protect(struct flash_bank_s *bank, int set, int first, int last)
 127 {
 128         LOG_USER("set protection sector %d to %d to %s", first, last, set?"on":"off");
 129         return ERROR_OK;
 130 }
 131
 132 static int faux_write(struct flash_bank_s *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
 133 {
 134         faux_flash_bank_t *info = bank->driver_priv;
 135         memcpy(info->memory + offset, buffer, count);
 136         return ERROR_OK;
 137 }
 138
 139 static int faux_protect_check(struct flash_bank_s *bank)
 140 {
 141         return ERROR_OK;
 142 }
 143
 144 static int faux_info(struct flash_bank_s *bank, char *buf, int buf_size)
 145 {
 146         snprintf(buf, buf_size, "faux flash driver");
 147         return ERROR_OK;
 148 }
 149
 150 static int faux_probe(struct flash_bank_s *bank)
 151 {
 152         return ERROR_OK;
 153 }