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
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "imp.h"
  26 #include <target/image.h>
  27 #include "hello.h"
  28
  29 struct faux_flash_bank {
  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                 return ERROR_COMMAND_SYNTAX_ERROR;
  46
  47         info = malloc(sizeof(struct faux_flash_bank));
  48         if (info == NULL) {
  49                 LOG_ERROR("no memory for flash bank info");
  50                 return ERROR_FAIL;
  51         }
  52         info->memory = malloc(bank->size);
  53         if (info == NULL) {
  54                 free(info);
  55                 LOG_ERROR("no memory for flash bank info");
  56                 return ERROR_FAIL;
  57         }
  58         bank->driver_priv = info;
  59
  60         /* Use 0x10000 as a fixed sector size. */
  61         int i = 0;
  62         uint32_t offset = 0;
  63         bank->num_sectors = bank->size/sectorSize;
  64         bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
  65         for (i = 0; i < bank->num_sectors; i++) {
  66                 bank->sectors[i].offset = offset;
  67                 bank->sectors[i].size = sectorSize;
  68                 offset += bank->sectors[i].size;
  69                 bank->sectors[i].is_erased = -1;
  70                 bank->sectors[i].is_protected = 0;
  71         }
  72
  73         info->target = get_target(CMD_ARGV[5]);
  74         if (info->target == NULL) {
  75                 LOG_ERROR("target '%s' not defined", CMD_ARGV[5]);
  76                 free(info->memory);
  77                 free(info);
  78                 return ERROR_FAIL;
  79         }
  80         return ERROR_OK;
  81 }
  82
  83 static int faux_erase(struct flash_bank *bank, int first, int last)
  84 {
  85         struct faux_flash_bank *info = bank->driver_priv;
  86         memset(info->memory + first*sectorSize, 0xff, sectorSize*(last-first + 1));
  87         return ERROR_OK;
  88 }
  89
  90 static int faux_protect(struct flash_bank *bank, int set, int first, int last)
  91 {
  92         LOG_USER("set protection sector %d to %d to %s", first, last, set ? "on" : "off");
  93         return ERROR_OK;
  94 }
  95
  96 static int faux_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
  97 {
  98         struct faux_flash_bank *info = bank->driver_priv;
  99         memcpy(info->memory + offset, buffer, count);
 100         return ERROR_OK;
 101 }
 102
 103 static int faux_protect_check(struct flash_bank *bank)
 104 {
 105         return ERROR_OK;
 106 }
 107
 108 static int faux_info(struct flash_bank *bank, char *buf, int buf_size)
 109 {
 110         snprintf(buf, buf_size, "faux flash driver");
 111         return ERROR_OK;
 112 }
 113
 114 static int faux_probe(struct flash_bank *bank)
 115 {
 116         return ERROR_OK;
 117 }
 118
 119 static const struct command_registration faux_command_handlers[] = {
 120         {
 121                 .name = "faux",
 122                 .mode = COMMAND_ANY,
 123                 .help = "faux flash command group",
 124                 .chain = hello_command_handlers,
 125         },
 126         COMMAND_REGISTRATION_DONE
 127 };
 128
 129 struct flash_driver faux_flash = {
 130         .name = "faux",
 131         .commands = faux_command_handlers,
 132         .flash_bank_command = faux_flash_bank_command,
 133         .erase = faux_erase,
 134         .protect = faux_protect,
 135         .write = faux_write,
 136         .read = default_flash_read,
 137         .probe = faux_probe,
 138         .auto_probe = faux_probe,
 139         .erase_check = default_flash_blank_check,
 140         .protect_check = faux_protect_check,
 141         .info = faux_info
 142 };