+ struct sandbox_mmc_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ if (plat->fname) {
+ ret = os_map_file(plat->fname, OS_O_RDWR | OS_O_CREAT,
+ (void **)&priv->buf, &priv->size);
+ if (ret) {
+ log_err("%s: Unable to map file '%s'\n", dev->name,
+ plat->fname);
+ return ret;
+ }
+ priv->csize = priv->size / SIZE_MULTIPLE - 1;
+ } else {
+ priv->csize = 0;
+ priv->size = (priv->csize + 1) * SIZE_MULTIPLE; /* 1 MiB */
+
+ priv->buf = malloc(priv->size);
+ if (!priv->buf) {
+ log_err("%s: Not enough memory (%x bytes)\n",
+ dev->name, priv->size);
+ return -ENOMEM;
+ }
+ }