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authorStefan Roese <sr@denx.de>2016-01-07 14:09:09 +0100
committerStefan Roese <sr@denx.de>2016-01-14 14:08:59 +0100
commita5f88877af9ae7d9f462efcbc5cb6fd7be9af106 (patch)
tree5f8f4c2f483262df1ac439e67ce1a417cd2b514a /arch/arm
parenta9fc5a247c2d9dc00de9b96234f4d597836af8bb (diff)
arm: mvebu: Add runtime boot-device detection
This patch adds runtime boot-device detection to SPL U-Boot. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Luka Perkov <luka.perkov@sartura.hr> Cc: Dirk Eibach <dirk.eibach@gdsys.cc> Cc: Phil Sutter <phil@nwl.cc> Cc: Kevin Smith <kevin.smith@elecsyscorp.com>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-mvebu/include/mach/soc.h16
-rw-r--r--arch/arm/mach-mvebu/spl.c30
2 files changed, 39 insertions, 7 deletions
diff --git a/arch/arm/mach-mvebu/include/mach/soc.h b/arch/arm/mach-mvebu/include/mach/soc.h
index f2cbd71602..e27a36db1c 100644
--- a/arch/arm/mach-mvebu/include/mach/soc.h
+++ b/arch/arm/mach-mvebu/include/mach/soc.h
@@ -99,14 +99,24 @@
#if defined(CONFIG_ARMADA_38X)
/* SAR values for Armada 38x */
#define CONFIG_SAR_REG (MVEBU_REGISTER(0x18600))
+
#define SAR_CPU_FREQ_OFFS 10
#define SAR_CPU_FREQ_MASK (0x1f << SAR_CPU_FREQ_OFFS)
#define SAR_BOOT_DEVICE_OFFS 4
#define SAR_BOOT_DEVICE_MASK (0x1f << SAR_BOOT_DEVICE_OFFS)
+
+#define BOOT_DEV_SEL_OFFS 4
+#define BOOT_DEV_SEL_MASK (0x1f << BOOT_DEV_SEL_OFFS)
+
+#define BOOT_FROM_UART 0x28
+#define BOOT_FROM_SPI 0x32
+#define BOOT_FROM_MMC 0x30
+#define BOOT_FROM_MMC_ALT 0x31
#else
/* SAR values for Armada XP */
#define CONFIG_SAR_REG (MVEBU_REGISTER(0x18230))
#define CONFIG_SAR2_REG (MVEBU_REGISTER(0x18234))
+
#define SAR_CPU_FREQ_OFFS 21
#define SAR_CPU_FREQ_MASK (0x7 << SAR_CPU_FREQ_OFFS)
#define SAR_FFC_FREQ_OFFS 24
@@ -115,6 +125,12 @@
#define SAR2_CPU_FREQ_MASK (0x1 << SAR2_CPU_FREQ_OFFS)
#define SAR_BOOT_DEVICE_OFFS 5
#define SAR_BOOT_DEVICE_MASK (0xf << SAR_BOOT_DEVICE_OFFS)
+
+#define BOOT_DEV_SEL_OFFS 5
+#define BOOT_DEV_SEL_MASK (0xf << BOOT_DEV_SEL_OFFS)
+
+#define BOOT_FROM_UART 0x2
+#define BOOT_FROM_SPI 0x3
#endif
#endif /* _MVEBU_SOC_H */
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index 832df0a004..778996eff5 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2014-2015 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
@@ -15,14 +15,30 @@
DECLARE_GLOBAL_DATA_PTR;
-u32 spl_boot_device(void)
+static u32 get_boot_device(void)
{
-#if defined(CONFIG_SPL_SPI_FLASH_SUPPORT)
- return BOOT_DEVICE_SPI;
-#endif
-#if defined(CONFIG_SPL_MMC_SUPPORT)
- return BOOT_DEVICE_MMC1;
+ u32 val;
+ u32 boot_device;
+
+ val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
+ boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS;
+ switch (boot_device) {
+#ifdef CONFIG_SPL_MMC_SUPPORT
+ case BOOT_FROM_MMC:
+ case BOOT_FROM_MMC_ALT:
+ return BOOT_DEVICE_MMC1;
#endif
+ case BOOT_FROM_UART:
+ return BOOT_DEVICE_UART;
+ case BOOT_FROM_SPI:
+ default:
+ return BOOT_DEVICE_SPI;
+ };
+}
+
+u32 spl_boot_device(void)
+{
+ return get_boot_device();
}
#ifdef CONFIG_SPL_MMC_SUPPORT