armv7R: K3: j721e: Add support for boot device detection

J721E allows for booting from primary or backup boot media.
Both media can be chosen individually based on switch settings.
ROM looks for a valid image in primary boot media, if not found
then looks in backup boot media. In order to pass this boot media
information to boot loader, ROM stores a value at a particular
address. Add support for reading this information and determining
the boot media correctly.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>

4 files changed, 88 insertions, 0 deletions

diff --git a/arch/arm/mach-k3/include/mach/hardware.h b/arch/arm/mach-k3/include/mach/hardware.h
index b39f780d26..4e629822aa 100644
--- a/arch/arm/mach-k3/include/mach/hardware.h
+++ b/arch/arm/mach-k3/include/mach/hardware.h
@@ -9,4 +9,8 @@
 #ifdef CONFIG_SOC_K3_AM6
 #include "am6_hardware.h"
 #endif
+
+#ifdef CONFIG_SOC_K3_J721E
+#include "j721e_hardware.h"
+#endif
 #endif /* _ASM_ARCH_HARDWARE_H_ */
diff --git a/arch/arm/mach-k3/include/mach/j721e_hardware.h b/arch/arm/mach-k3/include/mach/j721e_hardware.h
new file mode 100644
index 0000000000..8d429772b5
--- /dev/null
+++ b/arch/arm/mach-k3/include/mach/j721e_hardware.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * K3: J721E SoC definitions, structures etc.
+ *
+ * (C) Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
+ */
+#ifndef __ASM_ARCH_J721E_HARDWARE_H
+#define __ASM_ARCH_J721E_HARDWARE_H
+
+#include <config.h>
+
+#define CTRL_MMR0_BASE					0x00100000
+#define CTRLMMR_MAIN_DEVSTAT				(CTRL_MMR0_BASE + 0x30)
+
+#define MAIN_DEVSTAT_BOOT_MODE_B_MASK		BIT(0)
+#define MAIN_DEVSTAT_BOOT_MODE_B_SHIFT		0
+#define MAIN_DEVSTAT_BKUP_BOOTMODE_MASK		GENMASK(3, 1)
+#define MAIN_DEVSTAT_BKUP_BOOTMODE_SHIFT	1
+#define MAIN_DEVSTAT_PRIM_BOOTMODE_MMC_PORT_MASK	BIT(6)
+#define MAIN_DEVSTAT_PRIM_BOOTMODE_PORT_SHIFT		6
+
+#define WKUP_CTRL_MMR0_BASE				0x43000000
+#define MCU_CTRL_MMR0_BASE				0x40f00000
+
+#define CTRLMMR_WKUP_DEVSTAT			(WKUP_CTRL_MMR0_BASE + 0x30)
+#define WKUP_DEVSTAT_PRIMARY_BOOTMODE_MASK	GENMASK(5, 3)
+#define WKUP_DEVSTAT_PRIMARY_BOOTMODE_SHIFT	3
+#define WKUP_DEVSTAT_MCU_OMLY_MASK		BIT(6)
+#define WKUP_DEVSTAT_MCU_ONLY_SHIFT		6
+
+/*
+ * The CTRL_MMR0 memory space is divided into several equally-spaced
+ * partitions, so defining the partition size allows us to determine
+ * register addresses common to those partitions.
+ */
+#define CTRL_MMR0_PARTITION_SIZE			0x4000
+
+/*
+ * CTRL_MMR0, WKUP_CTRL_MMR0, and MCU_CTR_MMR0 lock/kick-mechanism
+ * shared register definitions.
+ */
+#define CTRLMMR_LOCK_KICK0				0x01008
+#define CTRLMMR_LOCK_KICK0_UNLOCK_VAL			0x68ef3490
+#define CTRLMMR_LOCK_KICK0_UNLOCKED_MASK		BIT(0)
+#define CTRLMMR_LOCK_KICK0_UNLOCKED_SHIFT		0
+#define CTRLMMR_LOCK_KICK1				0x0100c
+#define CTRLMMR_LOCK_KICK1_UNLOCK_VAL			0xd172bc5a
+
+#endif /* __ASM_ARCH_J721E_HARDWARE_H */
diff --git a/arch/arm/mach-k3/include/mach/j721e_spl.h b/arch/arm/mach-k3/include/mach/j721e_spl.h
new file mode 100644
index 0000000000..2b52faf944
--- /dev/null
+++ b/arch/arm/mach-k3/include/mach/j721e_spl.h
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2018-2019 Texas Instruments Incorporated - http://www.ti.com/
+ *	Lokesh Vutla <lokeshvutla@ti.com>
+ */
+#ifndef _ASM_ARCH_J721E_SPL_H_
+#define _ASM_ARCH_J721E_SPL_H_
+
+/* With BootMode B = 0 */
+#define BOOT_DEVICE_HYPERFLASH		0x00
+#define BOOT_DEVICE_OSPI		0x01
+#define BOOT_DEVICE_QSPI		0x02
+#define BOOT_DEVICE_SPI			0x03
+#define BOOT_DEVICE_ETHERNET		0x04
+#define BOOT_DEVICE_I2C			0x06
+#define BOOT_DEVICE_UART		0x07
+
+/* With BootMode B = 1 */
+#define BOOT_DEVICE_MMC2		0x10
+#define BOOT_DEVICE_MMC1		0x11
+#define BOOT_DEVICE_USB			0x12
+#define BOOT_DEVICE_UFS			0x13
+#define BOOT_DEVIE_GPMC			0x14
+#define BOOT_DEVICE_PCIE		0x15
+#define BOOT_DEVICE_MMC2_2		0x16
+#define BOOT_DEVICE_RAM			0x17
+
+#define BOOT_MODE_B_SHIFT		4
+#define BOOT_MODE_B_MASK		BIT(4)
+
+#endif
diff --git a/arch/arm/mach-k3/include/mach/spl.h b/arch/arm/mach-k3/include/mach/spl.h
index 2d435aec17..a26c8ecdd5 100644
--- a/arch/arm/mach-k3/include/mach/spl.h
+++ b/arch/arm/mach-k3/include/mach/spl.h
@@ -9,4 +9,8 @@
 #ifdef CONFIG_SOC_K3_AM6
 #include "am6_spl.h"
 #endif
+
+#ifdef CONFIG_SOC_K3_J721E
+#include "j721e_spl.h"
+#endif
 #endif /* _ASM_ARCH_SPL_H_ */