Saves the boot source into an environment variable so env scripts
can more easily use boot source information. We could also
look at the extra information in the MEM_TYPE bits if needed in future,
but this is good enough for my purposes.
Note only tested on imx35. I haven't added support for any other variants
because I'm not familiar with them. (And can't test them anyway).
Signed-off-by: Marc Reilly <marc@xxxxxxxxxxxxxxx>
---
arch/arm/mach-imx/Makefile | 1 +
arch/arm/mach-imx/boot.c | 61 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 62 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-imx/boot.c
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index d000683..3b2deaf 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -11,3 +11,4 @@ obj-$(CONFIG_IMX_IIM) += iim.o
obj-$(CONFIG_NAND_IMX) += nand.o
obj-y += speed.o
obj-y += devices.o
+obj-y += boot.o
diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c
new file mode 100644
index 0000000..560fc76
--- /dev/null
+++ b/arch/arm/mach-imx/boot.c
@@ -0,0 +1,61 @@
+/*
+ * 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>
+#include <environment.h>
+#include <init.h>
+
+#include <asm/io.h>
+#include <mach/imx-regs.h>
+
+#if defined(CONFIG_ARCH_IMX25) || defined(CONFIG_ARCH_IMX35)
+static int imx_boot_save_loc(void)
+{
+ const char *bootloc = NULL;
+ uint32_t reg;
+
+ reg = readl(IMX_CCM_BASE + CCM_RCSR);
+
+ switch ((reg >> CCM_RCSR_MEM_CTRL_SHIFT) & 0x3) {
+ case 0x03: /* SD/MMC, I2C, SPI is the source */
+ bootloc = "expansion";
+ break;
+ case 0x01: /* NAND is the source */
+ bootloc = "nand";
+ break;
+ case 0x00: /* NOR, OneNand is the source */
+ bootloc = "weim";
+ break;
+ default:
+ break;
+ }
+
+ if (bootloc) {
+ setenv("boot_loc", bootloc);
+ export("boot_loc");
+ }
+
+ return 0;
+}
+
+/*
+ * This can only be called after env_push_context() has been called
+ * so it is a late_initcall.
+ */
+late_initcall(imx_boot_save_loc);
+
+#endif
--
1.7.1
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