Move environment files from common/ to env/

About a quarter of the files in common/ relate to the environment. It
seems better to put these into their own subdirectory and remove the
prefix.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

1 files changed, 338 insertions, 0 deletions

diff --git a/env/flash.c b/env/flash.c
new file mode 100644
index 0000000000..004e8849a7
--- /dev/null
+++ b/env/flash.c
@@ -0,0 +1,338 @@
+/*
+ * (C) Copyright 2000-2010
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+#include <search.h>
+#include <errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
+#define CMD_SAVEENV
+#elif defined(CONFIG_ENV_ADDR_REDUND)
+#error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
+#endif
+
+#if defined(CONFIG_ENV_SIZE_REDUND) &&	\
+	(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
+#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
+#endif
+
+char *env_name_spec = "Flash";
+
+#ifdef ENV_IS_EMBEDDED
+env_t *env_ptr = &environment;
+
+static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
+
+#else /* ! ENV_IS_EMBEDDED */
+
+env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
+static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
+#endif /* ENV_IS_EMBEDDED */
+
+#if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
+/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
+static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
+#endif
+
+#ifdef CONFIG_ENV_ADDR_REDUND
+static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
+
+/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
+static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
+#endif /* CONFIG_ENV_ADDR_REDUND */
+
+
+#ifdef CONFIG_ENV_ADDR_REDUND
+int env_init(void)
+{
+	int crc1_ok = 0, crc2_ok = 0;
+
+	uchar flag1 = flash_addr->flags;
+	uchar flag2 = flash_addr_new->flags;
+
+	ulong addr_default = (ulong)&default_environment[0];
+	ulong addr1 = (ulong)&(flash_addr->data);
+	ulong addr2 = (ulong)&(flash_addr_new->data);
+
+	crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
+	crc2_ok =
+		crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
+
+	if (crc1_ok && !crc2_ok) {
+		gd->env_addr	= addr1;
+		gd->env_valid	= 1;
+	} else if (!crc1_ok && crc2_ok) {
+		gd->env_addr	= addr2;
+		gd->env_valid	= 1;
+	} else if (!crc1_ok && !crc2_ok) {
+		gd->env_addr	= addr_default;
+		gd->env_valid	= 0;
+	} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
+		gd->env_addr	= addr1;
+		gd->env_valid	= 1;
+	} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
+		gd->env_addr	= addr2;
+		gd->env_valid	= 1;
+	} else if (flag1 == flag2) {
+		gd->env_addr	= addr1;
+		gd->env_valid	= 2;
+	} else if (flag1 == 0xFF) {
+		gd->env_addr	= addr1;
+		gd->env_valid	= 2;
+	} else if (flag2 == 0xFF) {
+		gd->env_addr	= addr2;
+		gd->env_valid	= 2;
+	}
+
+	return 0;
+}
+
+#ifdef CMD_SAVEENV
+int saveenv(void)
+{
+	env_t	env_new;
+	char	*saved_data = NULL;
+	char	flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
+	int	rc = 1;
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+	ulong	up_data = 0;
+#endif
+
+	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
+
+	if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
+		goto done;
+
+	debug("Protect off %08lX ... %08lX\n",
+		(ulong)flash_addr_new, end_addr_new);
+
+	if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
+		goto done;
+
+	rc = env_export(&env_new);
+	if (rc)
+		return rc;
+	env_new.flags	= new_flag;
+
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+	up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
+	debug("Data to save 0x%lX\n", up_data);
+	if (up_data) {
+		saved_data = malloc(up_data);
+		if (saved_data == NULL) {
+			printf("Unable to save the rest of sector (%ld)\n",
+				up_data);
+			goto done;
+		}
+		memcpy(saved_data,
+			(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
+			up_data);
+		debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
+			(long)flash_addr_new + CONFIG_ENV_SIZE,
+			up_data, saved_data);
+	}
+#endif
+	puts("Erasing Flash...");
+	debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
+
+	if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
+		goto done;
+
+	puts("Writing to Flash... ");
+	debug(" %08lX ... %08lX ...",
+		(ulong)&(flash_addr_new->data),
+		sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
+	rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
+			 sizeof(env_new));
+	if (rc)
+		goto perror;
+
+	rc = flash_write(&flag, (ulong)&(flash_addr->flags),
+			 sizeof(flash_addr->flags));
+	if (rc)
+		goto perror;
+
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+	if (up_data) { /* restore the rest of sector */
+		debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
+			(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
+		if (flash_write(saved_data,
+				(long)flash_addr_new + CONFIG_ENV_SIZE,
+				up_data))
+			goto perror;
+	}
+#endif
+	puts("done\n");
+
+	{
+		env_t *etmp = flash_addr;
+		ulong ltmp = end_addr;
+
+		flash_addr = flash_addr_new;
+		flash_addr_new = etmp;
+
+		end_addr = end_addr_new;
+		end_addr_new = ltmp;
+	}
+
+	rc = 0;
+	goto done;
+perror:
+	flash_perror(rc);
+done:
+	if (saved_data)
+		free(saved_data);
+	/* try to re-protect */
+	flash_sect_protect(1, (ulong)flash_addr, end_addr);
+	flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
+
+	return rc;
+}
+#endif /* CMD_SAVEENV */
+
+#else /* ! CONFIG_ENV_ADDR_REDUND */
+
+int env_init(void)
+{
+	if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
+		gd->env_addr	= (ulong)&(env_ptr->data);
+		gd->env_valid	= 1;
+		return 0;
+	}
+
+	gd->env_addr	= (ulong)&default_environment[0];
+	gd->env_valid	= 0;
+	return 0;
+}
+
+#ifdef CMD_SAVEENV
+int saveenv(void)
+{
+	env_t	env_new;
+	int	rc = 1;
+	char	*saved_data = NULL;
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+	ulong	up_data = 0;
+
+	up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
+	debug("Data to save 0x%lx\n", up_data);
+	if (up_data) {
+		saved_data = malloc(up_data);
+		if (saved_data == NULL) {
+			printf("Unable to save the rest of sector (%ld)\n",
+				up_data);
+			goto done;
+		}
+		memcpy(saved_data,
+			(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
+		debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
+			(ulong)flash_addr + CONFIG_ENV_SIZE,
+			up_data,
+			(ulong)saved_data);
+	}
+#endif	/* CONFIG_ENV_SECT_SIZE */
+
+	debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
+
+	if (flash_sect_protect(0, (long)flash_addr, end_addr))
+		goto done;
+
+	rc = env_export(&env_new);
+	if (rc)
+		goto done;
+
+	puts("Erasing Flash...");
+	if (flash_sect_erase((long)flash_addr, end_addr))
+		goto done;
+
+	puts("Writing to Flash... ");
+	rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
+	if (rc != 0)
+		goto perror;
+
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+	if (up_data) {	/* restore the rest of sector */
+		debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
+			(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
+		if (flash_write(saved_data,
+				(long)flash_addr + CONFIG_ENV_SIZE,
+				up_data))
+			goto perror;
+	}
+#endif
+	puts("done\n");
+	rc = 0;
+	goto done;
+perror:
+	flash_perror(rc);
+done:
+	if (saved_data)
+		free(saved_data);
+	/* try to re-protect */
+	flash_sect_protect(1, (long)flash_addr, end_addr);
+	return rc;
+}
+#endif /* CMD_SAVEENV */
+
+#endif /* CONFIG_ENV_ADDR_REDUND */
+
+void env_relocate_spec(void)
+{
+#ifdef CONFIG_ENV_ADDR_REDUND
+	if (gd->env_addr != (ulong)&(flash_addr->data)) {
+		env_t *etmp = flash_addr;
+		ulong ltmp = end_addr;
+
+		flash_addr = flash_addr_new;
+		flash_addr_new = etmp;
+
+		end_addr = end_addr_new;
+		end_addr_new = ltmp;
+	}
+
+	if (flash_addr_new->flags != OBSOLETE_FLAG &&
+	    crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
+		char flag = OBSOLETE_FLAG;
+
+		gd->env_valid = 2;
+		flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
+		flash_write(&flag,
+			    (ulong)&(flash_addr_new->flags),
+			    sizeof(flash_addr_new->flags));
+		flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
+	}
+
+	if (flash_addr->flags != ACTIVE_FLAG &&
+	    (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
+		char flag = ACTIVE_FLAG;
+
+		gd->env_valid = 2;
+		flash_sect_protect(0, (ulong)flash_addr, end_addr);
+		flash_write(&flag,
+			    (ulong)&(flash_addr->flags),
+			    sizeof(flash_addr->flags));
+		flash_sect_protect(1, (ulong)flash_addr, end_addr);
+	}
+
+	if (gd->env_valid == 2)
+		puts("*** Warning - some problems detected "
+		     "reading environment; recovered successfully\n\n");
+#endif /* CONFIG_ENV_ADDR_REDUND */
+
+	env_import((char *)flash_addr, 1);
+}