src/flash/nor/virtual.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2010 by Spencer Oliver                                  *
   5  *   spen@spen-soft.co.uk                                                  *
   6  ***************************************************************************/
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include "config.h"
  10 #endif
  11
  12 #include "imp.h"
  13
  14 static struct flash_bank *virtual_get_master_bank(struct flash_bank *bank)
  15 {
  16         struct flash_bank *master_bank;
  17
  18         master_bank = get_flash_bank_by_name_noprobe(bank->driver_priv);
  19         if (!master_bank)
  20                 LOG_ERROR("master flash bank '%s' does not exist", (char *)bank->driver_priv);
  21
  22         return master_bank;
  23 }
  24
  25 static void virtual_update_bank_info(struct flash_bank *bank)
  26 {
  27         struct flash_bank *master_bank = virtual_get_master_bank(bank);
  28
  29         if (!master_bank)
  30                 return;
  31
  32         /* update the info we do not have */
  33         bank->size = master_bank->size;
  34         bank->chip_width = master_bank->chip_width;
  35         bank->bus_width = master_bank->bus_width;
  36         bank->erased_value = master_bank->erased_value;
  37         bank->default_padded_value = master_bank->default_padded_value;
  38         bank->write_start_alignment = master_bank->write_start_alignment;
  39         bank->write_end_alignment = master_bank->write_end_alignment;
  40         bank->minimal_write_gap = master_bank->minimal_write_gap;
  41         bank->num_sectors = master_bank->num_sectors;
  42         bank->sectors = master_bank->sectors;
  43         bank->num_prot_blocks = master_bank->num_prot_blocks;
  44         bank->prot_blocks = master_bank->prot_blocks;
  45 }
  46
  47 FLASH_BANK_COMMAND_HANDLER(virtual_flash_bank_command)
  48 {
  49         if (CMD_ARGC < 7)
  50                 return ERROR_COMMAND_SYNTAX_ERROR;
  51
  52         /* get the master flash bank */
  53         const char *bank_name = CMD_ARGV[6];
  54         struct flash_bank *master_bank = get_flash_bank_by_name_noprobe(bank_name);
  55
  56         if (!master_bank) {
  57                 LOG_ERROR("master flash bank '%s' does not exist", bank_name);
  58                 return ERROR_FLASH_OPERATION_FAILED;
  59         }
  60
  61         /* save master bank name - use this to get settings later */
  62         bank->driver_priv = strdup(bank_name);
  63
  64         return ERROR_OK;
  65 }
  66
  67 static int virtual_protect(struct flash_bank *bank, int set, unsigned int first,
  68                 unsigned int last)
  69 {
  70         struct flash_bank *master_bank = virtual_get_master_bank(bank);
  71
  72         if (!master_bank)
  73                 return ERROR_FLASH_OPERATION_FAILED;
  74
  75         return flash_driver_protect(master_bank, set, first, last);
  76 }
  77
  78 static int virtual_protect_check(struct flash_bank *bank)
  79 {
  80         struct flash_bank *master_bank = virtual_get_master_bank(bank);
  81
  82         if (!master_bank)
  83                 return ERROR_FLASH_OPERATION_FAILED;
  84
  85         if (!master_bank->driver->protect_check)
  86                 return ERROR_FLASH_OPER_UNSUPPORTED;
  87
  88         /* call master handler */
  89         return master_bank->driver->protect_check(master_bank);
  90 }
  91
  92 static int virtual_erase(struct flash_bank *bank, unsigned int first,
  93                 unsigned int last)
  94 {
  95         struct flash_bank *master_bank = virtual_get_master_bank(bank);
  96         int retval;
  97
  98         if (!master_bank)
  99                 return ERROR_FLASH_OPERATION_FAILED;
 100
 101         /* call master handler */
 102         retval = master_bank->driver->erase(master_bank, first, last);
 103         if (retval != ERROR_OK)
 104                 return retval;
 105
 106         return ERROR_OK;
 107 }
 108
 109 static int virtual_write(struct flash_bank *bank, const uint8_t *buffer,
 110                 uint32_t offset, uint32_t count)
 111 {
 112         struct flash_bank *master_bank = virtual_get_master_bank(bank);
 113         int retval;
 114
 115         if (!master_bank)
 116                 return ERROR_FLASH_OPERATION_FAILED;
 117
 118         /* call master handler */
 119         retval = master_bank->driver->write(master_bank, buffer, offset, count);
 120         if (retval != ERROR_OK)
 121                 return retval;
 122
 123         return ERROR_OK;
 124 }
 125
 126 static int virtual_probe(struct flash_bank *bank)
 127 {
 128         struct flash_bank *master_bank = virtual_get_master_bank(bank);
 129         int retval;
 130
 131         if (!master_bank)
 132                 return ERROR_FLASH_OPERATION_FAILED;
 133
 134         /* call master handler */
 135         retval = master_bank->driver->probe(master_bank);
 136         if (retval != ERROR_OK)
 137                 return retval;
 138
 139         /* update the info we do not have */
 140         virtual_update_bank_info(bank);
 141
 142         return ERROR_OK;
 143 }
 144
 145 static int virtual_auto_probe(struct flash_bank *bank)
 146 {
 147         struct flash_bank *master_bank = virtual_get_master_bank(bank);
 148         int retval;
 149
 150         if (!master_bank)
 151                 return ERROR_FLASH_OPERATION_FAILED;
 152
 153         /* call master handler */
 154         retval = master_bank->driver->auto_probe(master_bank);
 155         if (retval != ERROR_OK)
 156                 return retval;
 157
 158         /* update the info we do not have */
 159         virtual_update_bank_info(bank);
 160
 161         return ERROR_OK;
 162 }
 163
 164 static int virtual_info(struct flash_bank *bank, struct command_invocation *cmd)
 165 {
 166         struct flash_bank *master_bank = virtual_get_master_bank(bank);
 167
 168         if (!master_bank)
 169                 return ERROR_FLASH_OPERATION_FAILED;
 170
 171         command_print_sameline(cmd, "%s driver for flash bank %s at " TARGET_ADDR_FMT,
 172                         bank->driver->name, master_bank->name, master_bank->base);
 173
 174         return ERROR_OK;
 175 }
 176
 177 static int virtual_blank_check(struct flash_bank *bank)
 178 {
 179         struct flash_bank *master_bank = virtual_get_master_bank(bank);
 180         int retval;
 181
 182         if (!master_bank)
 183                 return ERROR_FLASH_OPERATION_FAILED;
 184
 185         /* call master handler */
 186         retval = master_bank->driver->erase_check(master_bank);
 187         if (retval != ERROR_OK)
 188                 return retval;
 189
 190         return ERROR_OK;
 191 }
 192
 193 static int virtual_flash_read(struct flash_bank *bank,
 194                 uint8_t *buffer, uint32_t offset, uint32_t count)
 195 {
 196         struct flash_bank *master_bank = virtual_get_master_bank(bank);
 197         int retval;
 198
 199         if (!master_bank)
 200                 return ERROR_FLASH_OPERATION_FAILED;
 201
 202         /* call master handler */
 203         retval = master_bank->driver->read(master_bank, buffer, offset, count);
 204         if (retval != ERROR_OK)
 205                 return retval;
 206
 207         return ERROR_OK;
 208 }
 209
 210 const struct flash_driver virtual_flash = {
 211         .name = "virtual",
 212         .flash_bank_command = virtual_flash_bank_command,
 213         .erase = virtual_erase,
 214         .protect = virtual_protect,
 215         .write = virtual_write,
 216         .read = virtual_flash_read,
 217         .probe = virtual_probe,
 218         .auto_probe = virtual_auto_probe,
 219         .erase_check = virtual_blank_check,
 220         .protect_check = virtual_protect_check,
 221         .info = virtual_info,
 222         .free_driver_priv = default_flash_free_driver_priv,
 223 };