env/sf.c

   1 /*
   2  * (C) Copyright 2000-2010
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   6  * Andreas Heppel <aheppel@sysgo.de>
   7  *
   8  * (C) Copyright 2008 Atmel Corporation
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12 #include <common.h>
  13 #include <dm.h>
  14 #include <environment.h>
  15 #include <malloc.h>
  16 #include <spi.h>
  17 #include <spi_flash.h>
  18 #include <search.h>
  19 #include <errno.h>
  20 #include <dm/device-internal.h>
  21
  22 #ifndef CONFIG_ENV_SPI_BUS
  23 # define CONFIG_ENV_SPI_BUS     CONFIG_SF_DEFAULT_BUS
  24 #endif
  25 #ifndef CONFIG_ENV_SPI_CS
  26 # define CONFIG_ENV_SPI_CS      CONFIG_SF_DEFAULT_CS
  27 #endif
  28 #ifndef CONFIG_ENV_SPI_MAX_HZ
  29 # define CONFIG_ENV_SPI_MAX_HZ  CONFIG_SF_DEFAULT_SPEED
  30 #endif
  31 #ifndef CONFIG_ENV_SPI_MODE
  32 # define CONFIG_ENV_SPI_MODE    CONFIG_SF_DEFAULT_MODE
  33 #endif
  34
  35 #ifndef CONFIG_SPL_BUILD
  36 #define CMD_SAVEENV
  37 #define INITENV
  38 #endif
  39
  40 #ifdef CONFIG_ENV_OFFSET_REDUND
  41 #ifdef CMD_SAVEENV
  42 static ulong env_offset         = CONFIG_ENV_OFFSET;
  43 static ulong env_new_offset     = CONFIG_ENV_OFFSET_REDUND;
  44 #endif
  45
  46 #define ACTIVE_FLAG     1
  47 #define OBSOLETE_FLAG   0
  48 #endif /* CONFIG_ENV_OFFSET_REDUND */
  49
  50 DECLARE_GLOBAL_DATA_PTR;
  51
  52 static struct spi_flash *env_flash;
  53
  54 static int setup_flash_device(void)
  55 {
  56 #ifdef CONFIG_DM_SPI_FLASH
  57         struct udevice *new;
  58         int     ret;
  59
  60         /* speed and mode will be read from DT */
  61         ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
  62                                      0, 0, &new);
  63         if (ret) {
  64                 set_default_env("!spi_flash_probe_bus_cs() failed");
  65                 return ret;
  66         }
  67
  68         env_flash = dev_get_uclass_priv(new);
  69 #else
  70
  71         if (!env_flash) {
  72                 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS,
  73                         CONFIG_ENV_SPI_CS,
  74                         CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
  75                 if (!env_flash) {
  76                         set_default_env("!spi_flash_probe() failed");
  77                         return -EIO;
  78                 }
  79         }
  80 #endif
  81         return 0;
  82 }
  83
  84 #if defined(CONFIG_ENV_OFFSET_REDUND)
  85 #ifdef CMD_SAVEENV
  86 static int env_sf_save(void)
  87 {
  88         env_t   env_new;
  89         char    *saved_buffer = NULL, flag = OBSOLETE_FLAG;
  90         u32     saved_size, saved_offset, sector;
  91         int     ret;
  92
  93         ret = setup_flash_device();
  94         if (ret)
  95                 return ret;
  96
  97         ret = env_export(&env_new);
  98         if (ret)
  99                 return -EIO;
 100         env_new.flags   = ACTIVE_FLAG;
 101
 102         if (gd->env_valid == ENV_VALID) {
 103                 env_new_offset = CONFIG_ENV_OFFSET_REDUND;
 104                 env_offset = CONFIG_ENV_OFFSET;
 105         } else {
 106                 env_new_offset = CONFIG_ENV_OFFSET;
 107                 env_offset = CONFIG_ENV_OFFSET_REDUND;
 108         }
 109
 110         /* Is the sector larger than the env (i.e. embedded) */
 111         if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
 112                 saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
 113                 saved_offset = env_new_offset + CONFIG_ENV_SIZE;
 114                 saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
 115                 if (!saved_buffer) {
 116                         ret = -ENOMEM;
 117                         goto done;
 118                 }
 119                 ret = spi_flash_read(env_flash, saved_offset,
 120                                         saved_size, saved_buffer);
 121                 if (ret)
 122                         goto done;
 123         }
 124
 125         sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
 126
 127         puts("Erasing SPI flash...");
 128         ret = spi_flash_erase(env_flash, env_new_offset,
 129                                 sector * CONFIG_ENV_SECT_SIZE);
 130         if (ret)
 131                 goto done;
 132
 133         puts("Writing to SPI flash...");
 134
 135         ret = spi_flash_write(env_flash, env_new_offset,
 136                 CONFIG_ENV_SIZE, &env_new);
 137         if (ret)
 138                 goto done;
 139
 140         if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
 141                 ret = spi_flash_write(env_flash, saved_offset,
 142                                         saved_size, saved_buffer);
 143                 if (ret)
 144                         goto done;
 145         }
 146
 147         ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
 148                                 sizeof(env_new.flags), &flag);
 149         if (ret)
 150                 goto done;
 151
 152         puts("done\n");
 153
 154         gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
 155
 156         printf("Valid environment: %d\n", (int)gd->env_valid);
 157
 158  done:
 159         if (saved_buffer)
 160                 free(saved_buffer);
 161
 162         return ret;
 163 }
 164 #endif /* CMD_SAVEENV */
 165
 166 static int env_sf_load(void)
 167 {
 168         int ret;
 169         int read1_fail, read2_fail;
 170         env_t *tmp_env1, *tmp_env2;
 171
 172         tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
 173                         CONFIG_ENV_SIZE);
 174         tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
 175                         CONFIG_ENV_SIZE);
 176         if (!tmp_env1 || !tmp_env2) {
 177                 set_default_env("!malloc() failed");
 178                 ret = -EIO;
 179                 goto out;
 180         }
 181
 182         ret = setup_flash_device();
 183         if (ret)
 184                 goto out;
 185
 186         read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
 187                                     CONFIG_ENV_SIZE, tmp_env1);
 188         read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
 189                                     CONFIG_ENV_SIZE, tmp_env2);
 190
 191         ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
 192                                 read2_fail);
 193
 194         spi_flash_free(env_flash);
 195         env_flash = NULL;
 196 out:
 197         free(tmp_env1);
 198         free(tmp_env2);
 199
 200         return ret;
 201 }
 202 #else
 203 #ifdef CMD_SAVEENV
 204 static int env_sf_save(void)
 205 {
 206         u32     saved_size, saved_offset, sector;
 207         char    *saved_buffer = NULL;
 208         int     ret = 1;
 209         env_t   env_new;
 210
 211         ret = setup_flash_device();
 212         if (ret)
 213                 return ret;
 214
 215         /* Is the sector larger than the env (i.e. embedded) */
 216         if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
 217                 saved_size = CONFIG_ENV_SECT_SIZE - CONFIG_ENV_SIZE;
 218                 saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
 219                 saved_buffer = malloc(saved_size);
 220                 if (!saved_buffer)
 221                         goto done;
 222
 223                 ret = spi_flash_read(env_flash, saved_offset,
 224                         saved_size, saved_buffer);
 225                 if (ret)
 226                         goto done;
 227         }
 228
 229         ret = env_export(&env_new);
 230         if (ret)
 231                 goto done;
 232
 233         sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, CONFIG_ENV_SECT_SIZE);
 234
 235         puts("Erasing SPI flash...");
 236         ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
 237                 sector * CONFIG_ENV_SECT_SIZE);
 238         if (ret)
 239                 goto done;
 240
 241         puts("Writing to SPI flash...");
 242         ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
 243                 CONFIG_ENV_SIZE, &env_new);
 244         if (ret)
 245                 goto done;
 246
 247         if (CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE) {
 248                 ret = spi_flash_write(env_flash, saved_offset,
 249                         saved_size, saved_buffer);
 250                 if (ret)
 251                         goto done;
 252         }
 253
 254         ret = 0;
 255         puts("done\n");
 256
 257  done:
 258         if (saved_buffer)
 259                 free(saved_buffer);
 260
 261         return ret;
 262 }
 263 #endif /* CMD_SAVEENV */
 264
 265 static int env_sf_load(void)
 266 {
 267         int ret;
 268         char *buf = NULL;
 269
 270         buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
 271         if (!buf) {
 272                 set_default_env("!malloc() failed");
 273                 return -EIO;
 274         }
 275
 276         ret = setup_flash_device();
 277         if (ret)
 278                 goto out;
 279
 280         ret = spi_flash_read(env_flash,
 281                 CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
 282         if (ret) {
 283                 set_default_env("!spi_flash_read() failed");
 284                 goto err_read;
 285         }
 286
 287         ret = env_import(buf, 1);
 288         if (!ret)
 289                 gd->env_valid = ENV_VALID;
 290
 291 err_read:
 292         spi_flash_free(env_flash);
 293         env_flash = NULL;
 294 out:
 295         free(buf);
 296
 297         return ret;
 298 }
 299 #endif
 300
 301 #if defined(INITENV) && defined(CONFIG_ENV_ADDR)
 302 static int env_sf_init(void)
 303 {
 304         env_t *env_ptr = (env_t *)(CONFIG_ENV_ADDR);
 305
 306         if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
 307                 gd->env_addr    = (ulong)&(env_ptr->data);
 308                 gd->env_valid   = 1;
 309         } else {
 310                 gd->env_addr = (ulong)&default_environment[0];
 311                 gd->env_valid = 1;
 312         }
 313
 314         return 0;
 315 }
 316 #endif
 317
 318 U_BOOT_ENV_LOCATION(sf) = {
 319         .location       = ENVL_SPI_FLASH,
 320         ENV_NAME("SPI Flash")
 321         .load           = env_sf_load,
 322 #ifdef CMD_SAVEENV
 323         .save           = env_save_ptr(env_sf_save),
 324 #endif
 325 #if defined(INITENV) && defined(CONFIG_ENV_ADDR)
 326         .init           = env_sf_init,
 327 #endif
 328 };