dm: Adjust lists_bind_fdt() to return the bound device

[karo-tx-uboot.git] / common / env_dataflash.c

diff --git a/common/env_dataflash.c b/common/env_dataflash.c
index 27a3bbcca03fba009cdcc3357ab0940e7af43b72..034e3231693e3b751dc41f6e181a9672f03d6540 100644 (file)
--- a/common/env_dataflash.c
+++ b/common/env_dataflash.c
@@ -1,98 +1,84 @@
-/* LowLevel function for DataFlash environment support
+/*
+ * LowLevel function for DataFlash environment support
  * Author : Gilles Gastaldi (Atmel)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 #include <common.h>
 #include <command.h>
 #include <environment.h>
 #include <linux/stddef.h>
 #include <dataflash.h>
+#include <search.h>
+#include <errno.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-env_t *env_ptr = NULL;
-
-char * env_name_spec = "dataflash";
+env_t *env_ptr;
 
-extern int read_dataflash (unsigned long addr, unsigned long size, char
-*result);
-extern int write_dataflash (unsigned long addr_dest, unsigned long addr_src,
-                    unsigned long size);
-extern int AT91F_DataflashInit (void);
-extern uchar default_environment[];
+char *env_name_spec = "dataflash";
 
-
-uchar env_get_char_spec (int index)
+uchar env_get_char_spec(int index)
 {
        uchar c;
-       read_dataflash(CONFIG_ENV_ADDR + index + offsetof(env_t,data),
-       1, (char *)&c);
-       return (c);
+
+       read_dataflash(CONFIG_ENV_ADDR + index + offsetof(env_t, data),
+                       1, (char *)&c);
+       return c;
 }
 
-void env_relocate_spec (void)
+void env_relocate_spec(void)
 {
-       read_dataflash(CONFIG_ENV_ADDR, CONFIG_ENV_SIZE, (char *)env_ptr);
+       ulong crc, new = 0;
+       unsigned off;
+       char buf[CONFIG_ENV_SIZE];
+
+       /* Read old CRC */
+       read_dataflash(CONFIG_ENV_ADDR + offsetof(env_t, crc),
+                      sizeof(ulong), (char *)&crc);
+
+       /* Read whole environment */
+       read_dataflash(CONFIG_ENV_ADDR, CONFIG_ENV_SIZE, buf);
+
+       /* Calculate the CRC */
+       off = offsetof(env_t, data);
+       new = crc32(new, (unsigned char *)(buf + off), ENV_SIZE);
+
+       if (crc == new)
+               env_import(buf, 1);
+       else
+               set_default_env("!bad CRC");
 }
 
+#ifdef CONFIG_ENV_OFFSET_REDUND
+#error No support for redundant environment on dataflash yet!
+#endif
+
 int saveenv(void)
 {
-       /* env must be copied to do not alter env structure in memory*/
-       unsigned char temp[CONFIG_ENV_SIZE];
-       memcpy(temp, env_ptr, CONFIG_ENV_SIZE);
-       return write_dataflash(CONFIG_ENV_ADDR, (unsigned long)temp, CONFIG_ENV_SIZE);
+       env_t env_new;
+       int ret;
+
+       ret = env_export(&env_new);
+       if (ret)
+               return ret;
+
+       return write_dataflash(CONFIG_ENV_ADDR,
+                               (unsigned long)&env_new,
+                               CONFIG_ENV_SIZE);
 }
 
-/************************************************************************
- * Initialize Environment use
+/*
+ * Initialize environment use
  *
- * We are still running from ROM, so data use is limited
+ * We are still running from ROM, so data use is limited.
  * Use a (moderately small) buffer on the stack
  */
 int env_init(void)
 {
-       ulong crc, len, new;
-       unsigned off;
-       uchar buf[64];
-       if (gd->env_valid == 0){
-               AT91F_DataflashInit();  /* prepare for DATAFLASH read/write */
-
-               /* read old CRC */
-               read_dataflash(CONFIG_ENV_ADDR + offsetof(env_t, crc),
-                       sizeof(ulong), (char *)&crc);
-               new = 0;
-               len = ENV_SIZE;
-               off = offsetof(env_t,data);
-               while (len > 0) {
-                       int n = (len > sizeof(buf)) ? sizeof(buf) : len;
-                       read_dataflash(CONFIG_ENV_ADDR + off, n, (char *)buf);
-                       new = crc32 (new, buf, n);
-                       len -= n;
-                       off += n;
-               }
-               if (crc == new) {
-                       gd->env_addr  = offsetof(env_t,data);
-                       gd->env_valid = 1;
-               } else {
-                       gd->env_addr  = (ulong)&default_environment[0];
-                       gd->env_valid = 0;
-               }
-       }
-
-       return (0);
+       /* use default */
+       gd->env_addr = (ulong)&default_environment[0];
+       gd->env_valid = 1;
+
+       return 0;
 }