From: Przemyslaw Marczak <p.marczak@samsung.com>
Date: Mon, 1 Sep 2014 11:50:44 +0000 (+0200)
Subject: arch:exynos: boot mode: add get_boot_mode(), code cleanup
X-Git-Tag: submit/tizen/20160419.084959~23
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cd337b54e11bad0a74755ac86abdd25c0ac3cb8a;p=profile%2Fcommon%2Fplatform%2Fkernel%2Fu-boot-artik.git

arch:exynos: boot mode: add get_boot_mode(), code cleanup

This patch introduces code clean-up for exynos boot mode check.
It includes:
- removal of typedef: boot_mode
- move the boot mode enum to arch-exynos/power.h
- add bootmode for sequence: eMMC 4.4 ch4 / SD ch2
- add new function: get_boot_mode() for OM[5:1] pin check
- update spl boot code

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>

Changes v5:
- exynos: boot mode: add missing bootmode (1st:EMMC 4.4 / 2nd:SD ch2)

Changes v6:
- none

changes v7:
- change boot mode name: BOOT_MODE_MMC to BOOT_MODE_SD
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

Conflicts:
	arch/arm/cpu/armv7/exynos/spl_boot.c
	arch/arm/include/asm/arch-exynos/spl.h

Change-Id: Ia91a5e251c476ee97bdd4921f602a5d737b6db10
---

diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index ffc6c45f5..9c6adb809 100644
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/arch/arm/cpu/armv7/exynos/power.c
@@ -212,3 +212,10 @@ void power_exit_wakeup(void)
 	else
 		exynos4_power_exit_wakeup();
 }
+
+unsigned int get_boot_mode(void)
+{
+	unsigned int om_pin = samsung_get_base_power();
+
+	return readl(om_pin) & OM_PIN_MASK;
+}
diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index b26a6ddb0..5d2d59a9c 100644
--- a/arch/arm/include/asm/arch-exynos/power.h
+++ b/arch/arm/include/asm/arch-exynos/power.h
@@ -901,6 +901,27 @@ struct exynos5430_power {
 };
 #endif	/* __ASSEMBLY__ */
 
+#define OM_PIN_BITS	0x1f
+#define OM_PIN_SHIFT	0x1
+#define OM_PIN_MASK	(OM_PIN_BITS << OM_PIN_SHIFT)
+
+enum {
+	/*
+	 * Assign the OM pin values for respective boot modes.
+	 * Exynos4 does not support spi boot and the mmc boot OM
+	 * pin values are the same across Exynos4 and Exynos5.
+	 */
+	BOOT_MODE_SD = 4,      /* SD_CH2  | USB */
+	BOOT_MODE_EMMC = 8,     /* EMMC4.4 | USB */
+	BOOT_MODE_EMMC_SD = 40, /* EMMC4.4 | SD_CH2 */
+	BOOT_MODE_SERIAL = 20,
+	/* Boot based on Operating Mode pin settings */
+	BOOT_MODE_OM = 32,
+	BOOT_MODE_USB,	/* Boot using USB download */
+};
+
+unsigned int get_boot_mode(void);
+
 void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable);
 
 #define EXYNOS_MIPI_PHY_ENABLE		(1 << 0)