Merge branch 'master' of ssh://mercury/home/wd/git/u-boot/master

1 files changed, 131 insertions, 0 deletions

diff --git a/common/env_sf.c b/common/env_sf.c
new file mode 100644
index 0000000..d641a9a
--- /dev/null
+++ b/common/env_sf.c
@@ -0,0 +1,131 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+ *
+ * (C) Copyright 2008 Atmel Corporation
+ *
+ * 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
+ */
+#include <common.h>
+
+#ifdef CFG_ENV_IS_IN_SPI_FLASH
+
+#include <environment.h>
+#include <spi_flash.h>
+
+#ifndef CFG_ENV_SPI_BUS
+# define CFG_ENV_SPI_BUS	0
+#endif
+#ifndef CFG_ENV_SPI_CS
+# define CFG_ENV_SPI_CS		0
+#endif
+#ifndef CFG_ENV_SPI_MAX_HZ
+# define CFG_ENV_SPI_MAX_HZ	1000000
+#endif
+#ifndef CFG_ENV_SPI_MODE
+# define CFG_ENV_SPI_MODE	SPI_MODE_3
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* references to names in env_common.c */
+extern uchar default_environment[];
+extern int default_environment_size;
+
+char * env_name_spec = "SPI Flash";
+env_t *env_ptr;
+
+static struct spi_flash *env_flash;
+
+uchar env_get_char_spec(int index)
+{
+	return *((uchar *)(gd->env_addr + index));
+}
+
+int saveenv(void)
+{
+	if (!env_flash) {
+		puts("Environment SPI flash not initialized\n");
+		return 1;
+	}
+
+	puts("Erasing SPI flash...");
+	if (spi_flash_erase(env_flash, CFG_ENV_OFFSET, CFG_ENV_SIZE))
+		return 1;
+
+	puts("Writing to SPI flash...");
+	if (spi_flash_write(env_flash, CFG_ENV_OFFSET, CFG_ENV_SIZE, env_ptr))
+		return 1;
+
+	puts("done\n");
+	return 0;
+}
+
+void env_relocate_spec(void)
+{
+	int ret;
+
+	env_flash = spi_flash_probe(CFG_ENV_SPI_BUS, CFG_ENV_SPI_CS,
+			CFG_ENV_SPI_MAX_HZ, CFG_ENV_SPI_MODE);
+	if (!env_flash)
+		goto err_probe;
+
+	ret = spi_flash_read(env_flash, CFG_ENV_OFFSET, CFG_ENV_SIZE, env_ptr);
+	if (ret)
+		goto err_read;
+
+	if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
+		goto err_crc;
+
+	gd->env_valid = 1;
+
+	return;
+
+err_read:
+	spi_flash_free(env_flash);
+	env_flash = NULL;
+err_probe:
+err_crc:
+	puts("*** Warning - bad CRC, using default environment\n\n");
+
+	if (default_environment_size > CFG_ENV_SIZE) {
+		gd->env_valid = 0;
+		puts("*** Error - default environment is too large\n\n");
+		return;
+	}
+
+	memset(env_ptr, 0, sizeof(env_t));
+	memcpy(env_ptr->data, default_environment, default_environment_size);
+	env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
+	gd->env_valid = 1;
+}
+
+int env_init(void)
+{
+	/* SPI flash isn't usable before relocation */
+	gd->env_addr = (ulong)&default_environment[0];
+	gd->env_valid = 1;
+
+	return 0;
+}
+
+#endif /* CFG_ENV_IS_IN_SPI_FLASH */