[U-Boot] [PATCH v4 01/15] imx6: Add imx6_src_get_boot_mode

Jagan Teki
2017-02-24T10:15:12Z

For i.MX6, the bootmode determine code is part of spl_boot_device,
but there is might be a possibility for other part the code need to
check the desired boot mode for adding new functionalities like
modeboot env variable, or changing boot order etc.

So introduced imx6_src_get_boot_mode which actually reading the
boot mode register for desired modes.

More cleanup will be add in future patches.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@openedev.com>
---
arch/arm/imx-common/init.c | 12 ++++++++++++
arch/arm/imx-common/spl.c | 4 ++--
arch/arm/include/asm/imx-common/sys_proto.h | 14 ++++++++++++++
3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/arch/arm/imx-common/init.c b/arch/arm/imx-common/init.c
index e5dbd93..036ebb2 100644
--- a/arch/arm/imx-common/init.c
+++ b/arch/arm/imx-common/init.c
@@ -115,3 +115,15 @@ void boot_mode_apply(unsigned cfg_val)
writel(reg, &psrc->gpr10);
}
#endif
+
+#if defined(CONFIG_MX6)
+u32 imx6_src_get_boot_mode(void)
+{
+ struct src *psrc = (struct src *)SRC_BASE_ADDR;
+
+ if (imx6_is_bmode_from_gpr9())
+ return readl(&psrc->gpr9);
+ else
+ return readl(&psrc->sbmr1);
+}
+#endif
diff --git a/arch/arm/imx-common/spl.c b/arch/arm/imx-common/spl.c
index 46325ec..6c20f28 100644
--- a/arch/arm/imx-common/spl.c
+++ b/arch/arm/imx-common/spl.c
@@ -10,6 +10,7 @@
#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
#include <asm/spl.h>
#include <spl.h>
#include <asm/imx-common/hab.h>
@@ -19,9 +20,8 @@
u32 spl_boot_device(void)
{
struct src *psrc = (struct src *)SRC_BASE_ADDR;
- unsigned int gpr10_boot = readl(&psrc->gpr10) & (1 << 28);
- unsigned reg = gpr10_boot ? readl(&psrc->gpr9) : readl(&psrc->sbmr1);
unsigned int bmode = readl(&psrc->sbmr2);
+ u32 reg = imx6_src_get_boot_mode();

/*
* Check for BMODE if serial downloader is enabled
diff --git a/arch/arm/include/asm/imx-common/sys_proto.h b/arch/arm/include/asm/imx-common/sys_proto.h
index 539d34b..99e3869 100644
--- a/arch/arm/include/asm/imx-common/sys_proto.h
+++ b/arch/arm/include/asm/imx-common/sys_proto.h
@@ -8,6 +8,7 @@
#ifndef _SYS_PROTO_H_
#define _SYS_PROTO_H_

+#include <asm/io.h>
#include <asm/imx-common/regs-common.h>
#include <common.h>
#include "../arch-imx/cpu.h"
@@ -38,6 +39,19 @@
#define is_mx6ull() (is_cpu_type(MXC_CPU_MX6ULL))
#define is_mx6sll() (is_cpu_type(MXC_CPU_MX6SLL))

+#ifdef CONFIG_MX6
+#define IMX6_SRC_GPR10_BMODE BIT(28)
+
+static inline u8 imx6_is_bmode_from_gpr9(void)
+{
+ struct src *psrc = (struct src *)SRC_BASE_ADDR;
+
+ return readl(&psrc->gpr10) & IMX6_SRC_GPR10_BMODE;
+}
+
+u32 imx6_src_get_boot_mode(void);
+#endif /* CONFIG_MX6 */
+
u32 get_nr_cpus(void);
u32 get_cpu_rev(void);
u32 get_cpu_speed_grade_hz(void);
--
1.9.1