ENGR00137358: Add saving environment to sata device support

Add saving environment to sata device support.

Signed-off-by: Terry Lv <r65388@freescale.com>

1 files changed, 162 insertions, 0 deletions

diff --git a/common/env_sata.c b/common/env_sata.c
new file mode 100755
index 0000000000..522a335bc3
--- /dev/null
+++ b/common/env_sata.c
@@ -0,0 +1,162 @@
+/*
+ * (C) Copyright 2010-2011 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <sata.h>
+
+/* references to names in env_common.c */
+extern uchar default_environment[];
+
+char *env_name_spec = "SATA";
+
+#ifdef ENV_IS_EMBEDDED
+extern uchar environment[];
+env_t *env_ptr = (env_t *)(&environment[0]);
+#else /* ! ENV_IS_EMBEDDED */
+env_t *env_ptr;
+#endif /* ENV_IS_EMBEDDED */
+
+extern int sata_curr_device;
+
+/* local functions */
+#if !defined(ENV_IS_EMBEDDED)
+static void use_default(void);
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+uchar env_get_char_spec(int index)
+{
+	return *((uchar *)(gd->env_addr + index));
+}
+
+int env_init(void)
+{
+	/* use default */
+	gd->env_addr = (ulong)&default_environment[0];
+	gd->env_valid = 1;
+
+	return 0;
+}
+
+#ifdef CONFIG_CMD_SAVEENV
+
+inline int write_env(block_dev_desc_t *sata, unsigned long size,
+			unsigned long offset, const void *buffer)
+{
+	uint blk_start, blk_cnt, n;
+
+	blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
+	blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
+
+	n = sata->block_write(sata_curr_device, blk_start,
+					blk_cnt, (u_char *)buffer);
+
+	return (n == blk_cnt) ? 0 : -1;
+}
+
+int saveenv(void)
+{
+	struct block_dev_desc_t *sata = NULL;
+
+	if (sata_curr_device == -1) {
+		if (sata_initialize())
+			return 1;
+		sata_curr_device = CONFIG_SATA_ENV_DEV;
+	}
+
+	if (sata_curr_device >= CONFIG_SYS_SATA_MAX_DEVICE) {
+		printf("Unknown SATA(%d) device for environment!\n",
+			sata_curr_device);
+		return 1;
+	}
+
+	sata = sata_get_dev(sata_curr_device);
+
+	printf("Writing to SATA(%d)... ", sata_curr_device);
+	if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, env_ptr)) {
+		puts("failed\n");
+		return 1;
+	}
+
+	puts("done\n");
+	return 0;
+}
+#endif /* CONFIG_CMD_SAVEENV */
+
+inline int read_env(block_dev_desc_t *sata, unsigned long size,
+			unsigned long offset, const void *buffer)
+{
+	uint blk_start, blk_cnt, n;
+
+	blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
+	blk_cnt   = ALIGN(size, sata->blksz) / sata->blksz;
+
+	n = sata->block_read(sata_curr_device, blk_start,
+					blk_cnt, (uchar *)buffer);
+
+	return (n == blk_cnt) ? 0 : -1;
+}
+
+void env_relocate_spec(void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+	struct block_dev_desc_t *sata = NULL;
+	int i = 0;
+
+	if (sata_curr_device == -1) {
+		if (sata_initialize())
+			return 1;
+		sata_curr_device = CONFIG_SATA_ENV_DEV;
+	}
+
+	if (sata_curr_device >= CONFIG_SYS_SATA_MAX_DEVICE) {
+		printf("Unknown SATA(%d) device for environment!\n",
+			sata_curr_device);
+		return 1;
+	}
+	sata = sata_get_dev(sata_curr_device);
+
+	if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, env_ptr))
+		return use_default();
+
+	if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
+		return use_default();
+
+	gd->env_valid = 1;
+#endif
+}
+
+#if !defined(ENV_IS_EMBEDDED)
+static void use_default()
+{
+	puts("*** Warning - bad CRC or MMC, using default environment\n\n");
+	set_default_env();
+}
+#endif
+