This introduces code to read the value of the SYS_BOOT pins on the OMAP5, as
well as the memory-preferred scheme for the interpretation of each value.
Signed-off-by: Paul Kocialkowski <cont...@paulk.fr>
---
arch/arm/cpu/armv7/omap5/Makefile | 1 +
arch/arm/cpu/armv7/omap5/boot.c | 45 +++++++++++++++++++++++++++++++++++++++
2 files changed, 46 insertions(+)
create mode 100644 arch/arm/cpu/armv7/omap5/boot.c
diff --git a/arch/arm/cpu/armv7/omap5/Makefile
b/arch/arm/cpu/armv7/omap5/Makefile
index 64c6879..6b8c683 100644
--- a/arch/arm/cpu/armv7/omap5/Makefile
+++ b/arch/arm/cpu/armv7/omap5/Makefile
@@ -5,6 +5,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-y += boot.o
obj-y += hwinit.o
obj-y += emif.o
obj-y += sdram.o
diff --git a/arch/arm/cpu/armv7/omap5/boot.c b/arch/arm/cpu/armv7/omap5/boot.c
new file mode 100644
index 0000000..eb7fee2
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap5/boot.c
@@ -0,0 +1,45 @@
+/*
+ * OMAP5 boot
+ *
+ * Copyright (C) 2015 Paul Kocialkowski <cont...@paulk.fr>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/omap_common.h>
+#include <spl.h>
+
+static u32 boot_devices[] = {
+ /* AM57XX */
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_SATA,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_SPI,
+ BOOT_DEVICE_SPI,
+ /* OMAP5 */
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_SATA,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_XIPWAIT,
+};
+
+u32 omap_sys_boot_device(void)
+{
+ u32 sys_boot;
+
+ /* Grab the first 4 bits of the status register for SYS_BOOT. */
+ sys_boot = readl((u32 *) (*ctrl)->control_status) & ((1 << 4) - 1);
+
+ if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
+ return BOOT_DEVICE_NONE;
+
+ return boot_devices[sys_boot];
+}
--
1.9.1
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