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authorPaul Kocialkowski <contact@paulk.fr>2015-07-15 16:02:25 +0200
committerTom Rini <trini@konsulko.com>2015-07-27 15:02:08 -0400
commit94fc751d8af74ed7ebb8da9537ab685c9a6d0b95 (patch)
tree4052445c4106a0572ac1923632729f2e124fc0ad /arch/arm/cpu/armv7/omap4
parentcfac375616c218d35a649240c5487b9331f50252 (diff)
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omap4: Definitions for SYS_BOOT-based fallback boot device selection
This introduces code to read the value of the SYS_BOOT pins on the OMAP4, as well as the memory-preferred scheme for the interpretation of each value. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Diffstat (limited to 'arch/arm/cpu/armv7/omap4')
-rw-r--r--arch/arm/cpu/armv7/omap4/Makefile1
-rw-r--r--arch/arm/cpu/armv7/omap4/boot.c60
-rw-r--r--arch/arm/cpu/armv7/omap4/prcm-regs.c1
3 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/omap4/Makefile b/arch/arm/cpu/armv7/omap4/Makefile
index 76a032a2d9..564f1f632f 100644
--- a/arch/arm/cpu/armv7/omap4/Makefile
+++ b/arch/arm/cpu/armv7/omap4/Makefile
@@ -5,6 +5,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-y += boot.o
obj-y += sdram_elpida.o
obj-y += hwinit.o
obj-y += emif.o
diff --git a/arch/arm/cpu/armv7/omap4/boot.c b/arch/arm/cpu/armv7/omap4/boot.c
new file mode 100644
index 0000000000..4b5aa770e7
--- /dev/null
+++ b/arch/arm/cpu/armv7/omap4/boot.c
@@ -0,0 +1,60 @@
+/*
+ * OMAP4 boot
+ *
+ * Copyright (C) 2015 Paul Kocialkowski <contact@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[] = {
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_NONE,
+ BOOT_DEVICE_XIPWAIT,
+};
+
+u32 omap_sys_boot_device(void)
+{
+ u32 sys_boot;
+
+ /* Grab the first 5 bits of the status register for SYS_BOOT. */
+ sys_boot = readl((u32 *) (*ctrl)->control_status) & ((1 << 5) - 1);
+
+ if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
+ return BOOT_DEVICE_NONE;
+
+ return boot_devices[sys_boot];
+}
diff --git a/arch/arm/cpu/armv7/omap4/prcm-regs.c b/arch/arm/cpu/armv7/omap4/prcm-regs.c
index 1ed146b445..8698ec7a48 100644
--- a/arch/arm/cpu/armv7/omap4/prcm-regs.c
+++ b/arch/arm/cpu/armv7/omap4/prcm-regs.c
@@ -279,6 +279,7 @@ struct prcm_regs const omap4_prcm = {
};
struct omap_sys_ctrl_regs const omap4_ctrl = {
+ .control_status = 0x4A0022C4,
.control_id_code = 0x4A002204,
.control_std_fuse_opp_bgap = 0x4a002260,
.control_status = 0x4a0022c4,
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