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, see <http://www.gnu.org/licenses/>. *
  17  ***************************************************************************/
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include "imp.h"
  24 #include <target/image.h>
  25 #include "hello.h"
  26
  27 struct faux_flash_bank {
  28         struct target *target;
  29         uint8_t *memory;
  30         uint32_t start_address;
  31 };
  32
  33 static const int sectorSize = 0x10000;
  34
  35
  36 /* flash bank faux <base> <size> <chip_width> <bus_width> <target#> <driverPath>
  37  */
  38 FLASH_BANK_COMMAND_HANDLER(faux_flash_bank_command)
  39 {
  40         struct faux_flash_bank *info;
  41
  42         if (CMD_ARGC < 6)
  43                 return ERROR_COMMAND_SYNTAX_ERROR;
  44
  45         info = malloc(sizeof(struct faux_flash_bank));
  46         if (info == NULL) {
  47                 LOG_ERROR("no memory for flash bank info");
  48                 return ERROR_FAIL;
  49         }
  50         info->memory = malloc(bank->size);
  51         if (info->memory == NULL) {
  52                 free(info);
  53                 LOG_ERROR("no memory for flash bank info");
  54                 return ERROR_FAIL;
  55         }
  56         bank->driver_priv = info;
  57
  58         /* Use 0x10000 as a fixed sector size. */
  59         int i = 0;
  60         uint32_t offset = 0;
  61         bank->num_sectors = bank->size/sectorSize;
  62         bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
  63         for (i = 0; i < bank->num_sectors; i++) {
  64                 bank->sectors[i].offset = offset;
  65                 bank->sectors[i].size = sectorSize;
  66                 offset += bank->sectors[i].size;
  67                 bank->sectors[i].is_erased = -1;
  68                 bank->sectors[i].is_protected = 0;
  69         }
  70
  71         info->target = get_target(CMD_ARGV[5]);
  72         if (info->target == NULL) {
  73                 LOG_ERROR("target '%s' not defined", CMD_ARGV[5]);
  74                 free(info->memory);
  75                 free(info);
  76                 return ERROR_FAIL;
  77         }
  78         return ERROR_OK;
  79 }
  80
  81 static int faux_erase(struct flash_bank *bank, int first, int last)
  82 {
  83         struct faux_flash_bank *info = bank->driver_priv;
  84         memset(info->memory + first*sectorSize, 0xff, sectorSize*(last-first + 1));
  85         return ERROR_OK;
  86 }
  87
  88 static int faux_protect(struct flash_bank *bank, int set, int first, int last)
  89 {
  90         LOG_USER("set protection sector %d to %d to %s", first, last, set ? "on" : "off");
  91         return ERROR_OK;
  92 }
  93
  94 static int faux_write(struct flash_bank *bank, const uint8_t *buffer, uint32_t offset, uint32_t count)
  95 {
  96         struct faux_flash_bank *info = bank->driver_priv;
  97         memcpy(info->memory + offset, buffer, count);
  98         return ERROR_OK;
  99 }
 100
 101 static int faux_protect_check(struct flash_bank *bank)
 102 {
 103         return ERROR_OK;
 104 }
 105
 106 static int faux_info(struct flash_bank *bank, char *buf, int buf_size)
 107 {
 108         snprintf(buf, buf_size, "faux flash driver");
 109         return ERROR_OK;
 110 }
 111
 112 static int faux_probe(struct flash_bank *bank)
 113 {
 114         return ERROR_OK;
 115 }
 116
 117 static const struct command_registration faux_command_handlers[] = {
 118         {
 119                 .name = "faux",
 120                 .mode = COMMAND_ANY,
 121                 .help = "faux flash command group",
 122                 .chain = hello_command_handlers,
 123         },
 124         COMMAND_REGISTRATION_DONE
 125 };
 126
 127 struct flash_driver faux_flash = {
 128         .name = "faux",
 129         .commands = faux_command_handlers,
 130         .flash_bank_command = faux_flash_bank_command,
 131         .erase = faux_erase,
 132         .protect = faux_protect,
 133         .write = faux_write,
 134         .read = default_flash_read,
 135         .probe = faux_probe,
 136         .auto_probe = faux_probe,
 137         .erase_check = default_flash_blank_check,
 138         .protect_check = faux_protect_check,
 139         .info = faux_info
 140 };