X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=env%2Fenv.c;h=dcc25c030b239944ccea2c05e4ed4a93b1ecdcc7;hb=4cc24aeaf420f33f7ee92f76e025a86fc9aaefec;hp=3795dbc24e2bcbb80b066146021f8ea085867a32;hpb=7961b9f6db19d039b4e6e9c21a9715b6d5b92393;p=oweals%2Fu-boot.git

diff --git a/env/env.c b/env/env.c
index 3795dbc24e..dcc25c030b 100644
--- a/env/env.c
+++ b/env/env.c
@@ -1,15 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier:     GPL-2.0+
  */
 
 #include <common.h>
-#include <environment.h>
+#include <env.h>
+#include <env_internal.h>
+#include <log.h>
+#include <linux/bitops.h>
+#include <linux/bug.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+void env_fix_drivers(void)
+{
+	struct env_driver *drv;
+	const int n_ents = ll_entry_count(struct env_driver, env_driver);
+	struct env_driver *entry;
+
+	drv = ll_entry_start(struct env_driver, env_driver);
+	for (entry = drv; entry != drv + n_ents; entry++) {
+		if (entry->name)
+			entry->name += gd->reloc_off;
+		if (entry->load)
+			entry->load += gd->reloc_off;
+		if (entry->save)
+			entry->save += gd->reloc_off;
+		if (entry->erase)
+			entry->erase += gd->reloc_off;
+		if (entry->init)
+			entry->init += gd->reloc_off;
+	}
+}
+#endif
+
 static struct env_driver *_env_driver_lookup(enum env_location loc)
 {
 	struct env_driver *drv;
@@ -51,6 +77,9 @@ static enum env_location env_locations[] = {
 #ifdef CONFIG_ENV_IS_IN_REMOTE
 	ENVL_REMOTE,
 #endif
+#ifdef CONFIG_ENV_IS_IN_SATA
+	ENVL_ESATA,
+#endif
 #ifdef CONFIG_ENV_IS_IN_SPI_FLASH
 	ENVL_SPI_FLASH,
 #endif
@@ -99,21 +128,12 @@ static void env_set_inited(enum env_location location)
  */
 __weak enum env_location env_get_location(enum env_operation op, int prio)
 {
-	switch (op) {
-	case ENVOP_GET_CHAR:
-	case ENVOP_INIT:
-	case ENVOP_LOAD:
-		if (prio >= ARRAY_SIZE(env_locations))
-			return ENVL_UNKNOWN;
-
-		gd->env_load_location = env_locations[prio];
-		return gd->env_load_location;
-
-	case ENVOP_SAVE:
-		return gd->env_load_location;
-	}
+	if (prio >= ARRAY_SIZE(env_locations))
+		return ENVL_UNKNOWN;
+
+	gd->env_load_prio = prio;
 
-	return ENVL_UNKNOWN;
+	return env_locations[prio];
 }
 
 
@@ -163,6 +183,7 @@ int env_get_char(int index)
 int env_load(void)
 {
 	struct env_driver *drv;
+	int best_prio = -1;
 	int prio;
 
 	for (prio = 0; (drv = env_driver_lookup(ENVOP_LOAD, prio)); prio++) {
@@ -175,7 +196,58 @@ int env_load(void)
 			continue;
 
 		printf("Loading Environment from %s... ", drv->name);
+		/*
+		 * In error case, the error message must be printed during
+		 * drv->load() in some underlying API, and it must be exactly
+		 * one message.
+		 */
 		ret = drv->load();
+		if (!ret) {
+			printf("OK\n");
+			return 0;
+		} else if (ret == -ENOMSG) {
+			/* Handle "bad CRC" case */
+			if (best_prio == -1)
+				best_prio = prio;
+		} else {
+			debug("Failed (%d)\n", ret);
+		}
+	}
+
+	/*
+	 * In case of invalid environment, we set the 'default' env location
+	 * to the best choice, i.e.:
+	 *   1. Environment location with bad CRC, if such location was found
+	 *   2. Otherwise use the location with highest priority
+	 *
+	 * This way, next calls to env_save() will restore the environment
+	 * at the right place.
+	 */
+	if (best_prio >= 0)
+		debug("Selecting environment with bad CRC\n");
+	else
+		best_prio = 0;
+	env_get_location(ENVOP_LOAD, best_prio);
+
+	return -ENODEV;
+}
+
+int env_save(void)
+{
+	struct env_driver *drv;
+
+	drv = env_driver_lookup(ENVOP_SAVE, gd->env_load_prio);
+	if (drv) {
+		int ret;
+
+		if (!drv->save)
+			return -ENODEV;
+
+		if (!env_has_inited(drv->location))
+			return -ENODEV;
+
+		printf("Saving Environment to %s... ", drv->name);
+		ret = drv->save();
 		if (ret)
 			printf("Failed (%d)\n", ret);
 		else
@@ -188,22 +260,22 @@ int env_load(void)
 	return -ENODEV;
 }
 
-int env_save(void)
+int env_erase(void)
 {
 	struct env_driver *drv;
-	int prio;
 
-	for (prio = 0; (drv = env_driver_lookup(ENVOP_SAVE, prio)); prio++) {
+	drv = env_driver_lookup(ENVOP_ERASE, gd->env_load_prio);
+	if (drv) {
 		int ret;
 
-		if (!drv->save)
-			continue;
+		if (!drv->erase)
+			return -ENODEV;
 
 		if (!env_has_inited(drv->location))
-			continue;
+			return -ENODEV;
 
-		printf("Saving Environment to %s... ", drv->name);
-		ret = drv->save();
+		printf("Erasing Environment on %s... ", drv->name);
+		ret = drv->erase();
 		if (ret)
 			printf("Failed (%d)\n", ret);
 		else