board: asus: transformer: add ASUS Transformer Pad TF701T support

The ASUS Transformer Pad TF701T is an Android tablet computer made by
ASUS, successor to the ASUS Transformer Pad Infinity. The tablet includes
a Tegra 4 T114 processor clocked at 1.9 GHz, and an upgraded 2560×1600
pixel resolution screen, increasing the pixel density to 300 PPI and
a mobile dock. Transformers (t114) board derives from Nvidia Macallan
development board.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

arch/arm/dts/Makefile

@@ -118,6 +118,7 @@ dtb-$(CONFIG_ARCH_TEGRA) += \
 	tegra30-ouya.dtb \
 	tegra30-tec-ng.dtb \
 	tegra30-wexler-qc750.dtb \
+	tegra114-asus-tf701t.dtb \
 	tegra114-dalmore.dtb \
 	tegra124-apalis.dtb \
 	tegra124-jetson-tk1.dtb \

arch/arm/mach-tegra/tegra114/Kconfig

@@ -8,11 +8,16 @@ config TARGET_DALMORE
 	bool "NVIDIA Tegra114 Dalmore evaluation board"
 	select BOARD_LATE_INIT
 
+config TARGET_TRANSFORMER_T114
+	bool "ASUS Tegra114 Transformer board"
+	select BOARD_LATE_INIT
+
 endchoice
 
 config SYS_SOC
 	default "tegra114"
 
 source "board/nvidia/dalmore/Kconfig"
+source "board/asus/transformer-t114/Kconfig"
 
 endif

board/asus/transformer-t114/Kconfig

@@ -0,0 +1,16 @@
+if TARGET_TRANSFORMER_T114
+
+config SYS_BOARD
+	default "transformer-t114"
+
+config SYS_VENDOR
+	default "asus"
+
+config SYS_CONFIG_NAME
+	default "transformer-t114"
+
+config TEGRA_BOARD_STRING
+	string "Default Tegra board name"
+	default "ASUS Transformer T114"
+
+endif

board/asus/transformer-t114/MAINTAINERS

@@ -0,0 +1,8 @@
+TRANSFORMER T114 BOARD
+M:	Svyatoslav Ryhel <clamor95@gmail.com>
+S:	Maintained
+F:	arch/arm/dts/tegra114-asus-tf701t.dts
+F:	board/asus/transformer-t114/
+F:	configs/tf701t_defconfig
+F:	doc/board/asus/transformer_t114.rst
+F:	include/configs/transformer-t114.h

board/asus/transformer-t114/Makefile

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c) 2010-2013, NVIDIA CORPORATION.  All rights reserved.
+#
+# Copyright (c) 2023, Svyatoslav Ryhel <clamor95@gmail.com>
+#
+
+obj-$(CONFIG_XPL_BUILD) += transformer-t114-spl.o
+
+obj-y += transformer-t114.o

board/asus/transformer-t114/transformer-t114-spl.c

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  T114 Transformers SPL stage configuration
+ *
+ *  (C) Copyright 2010-2013
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ *  (C) Copyright 2023
+ *  Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <asm/arch/tegra.h>
+#include <asm/arch-tegra/tegra_i2c.h>
+#include <linux/delay.h>
+
+#define TPS65913_I2C_ADDR		(0x58 << 1)
+
+#define TPS65913_SMPS12_CTRL		0x20
+#define TPS65913_SMPS12_VOLTAGE		0x23
+#define TPS65913_SMPS45_CTRL		0x28
+#define TPS65913_SMPS45_VOLTAGE		0x2B
+
+#define TPS65913_SMPS12_CTRL_DATA	(0x5100 | TPS65913_SMPS12_CTRL)
+#define TPS65913_SMPS12_VOLTAGE_DATA	(0x3900 | TPS65913_SMPS12_VOLTAGE)
+#define TPS65913_SMPS45_CTRL_DATA	(0x5100 | TPS65913_SMPS45_CTRL)
+#define TPS65913_SMPS45_VOLTAGE_DATA	(0x4c00 | TPS65913_SMPS45_VOLTAGE)
+
+void pmic_enable_cpu_vdd(void)
+{
+	/* Set CORE VDD to 1.200V. */
+	tegra_i2c_ll_write(TPS65913_I2C_ADDR, TPS65913_SMPS45_VOLTAGE_DATA);
+	udelay(1000);
+	tegra_i2c_ll_write(TPS65913_I2C_ADDR, TPS65913_SMPS45_CTRL_DATA);
+
+	udelay(1000);
+
+	/* Set CPU VDD to 1.0125V. */
+	tegra_i2c_ll_write(TPS65913_I2C_ADDR, TPS65913_SMPS12_VOLTAGE_DATA);
+	udelay(1000);
+	tegra_i2c_ll_write(TPS65913_I2C_ADDR, TPS65913_SMPS12_CTRL_DATA);
+	udelay(10 * 1000);
+}

board/asus/transformer-t114/transformer-t114.c

@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  (C) Copyright 2010-2013
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ *  (C) Copyright 2023
+ *  Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+/* T114 Transformers derive from Macallan board */
+
+#include <dm.h>
+#include <fdt_support.h>
+#include <i2c.h>
+#include <log.h>
+
+#ifdef CONFIG_MMC_SDHCI_TEGRA
+
+#define TPS65913_I2C_ADDRESS			0x58
+#define TPS65913_PRIMARY_SECONDARY_PAD2		0xfb
+#define   GPIO_4				BIT(0)
+#define TPS65913_PRIMARY_SECONDARY_PAD3		0xfe
+#define   DVFS2					BIT(1)
+#define   DVFS1					BIT(0)
+
+/* We are using this function only till palmas pinctrl driver is available */
+void pin_mux_mmc(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(0, TPS65913_I2C_ADDRESS, 1, &dev);
+	if (ret) {
+		log_debug("%s: cannot find PMIC I2C chip\n", __func__);
+		return;
+	}
+
+	/* GPIO4 function has to be GPIO */
+	dm_i2c_reg_clrset(dev, TPS65913_PRIMARY_SECONDARY_PAD2,
+			  GPIO_4, 0);
+
+	/* DVFS1 is enabled, DVFS2 is disabled */
+	dm_i2c_reg_clrset(dev, TPS65913_PRIMARY_SECONDARY_PAD3,
+			  DVFS2 | DVFS1, DVFS1);
+}
+#endif
+
+#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	/* Remove TrustZone nodes */
+	fdt_del_node_and_alias(blob, "/firmware");
+	fdt_del_node_and_alias(blob, "/reserved-memory/trustzone@bfe00000");
+
+	return 0;
+}
+#endif

board/asus/transformer-t114/transformer-t114.env

@@ -0,0 +1,15 @@
+button_cmd_0_name=Volume Down
+button_cmd_0=bootmenu
+button_cmd_1_name=Hall Sensor
+button_cmd_1=poweroff
+
+fastboot_partition_alias_boot=CAC
+fastboot_partition_alias_root=UDA
+
+bootmenu_0=mount internal storage=usb start && ums 0 mmc 0:e; bootmenu
+bootmenu_1=mount external storage=usb start && ums 0 mmc 1; bootmenu
+bootmenu_2=fastboot=echo Starting Fastboot protocol ...; fastboot usb 0; bootmenu
+bootmenu_3=reboot RCM=enterrcm
+bootmenu_4=reboot=reset
+bootmenu_5=power off=poweroff
+bootmenu_delay=-1

configs/tf701t_defconfig

@@ -0,0 +1,89 @@
+CONFIG_ARM=y
+CONFIG_ARCH_TEGRA=y
+CONFIG_SUPPORT_PASSING_ATAGS=y
+CONFIG_CMDLINE_TAG=y
+CONFIG_INITRD_TAG=y
+CONFIG_TEXT_BASE=0x80110000
+CONFIG_SYS_MALLOC_LEN=0x2500000
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_ENV_SOURCE_FILE="transformer-t114"
+CONFIG_ENV_SIZE=0x3000
+CONFIG_ENV_OFFSET=0xFFFFD000
+CONFIG_DEFAULT_DEVICE_TREE="tegra114-asus-tf701t"
+CONFIG_SPL_STACK=0x800ffffc
+CONFIG_SPL_TEXT_BASE=0x80108000
+CONFIG_SYS_LOAD_ADDR=0x82000000
+CONFIG_TEGRA114=y
+CONFIG_TARGET_TRANSFORMER_T114=y
+CONFIG_TEGRA_ENABLE_UARTD=y
+CONFIG_BUTTON_CMD=y
+CONFIG_BOOTDELAY=0
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_KEYED_CTRLC=y
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_OF_SYSTEM_SETUP=y
+CONFIG_BOOTCOMMAND="bootflow scan; echo 'Boot configuration not found... Power off in 3 sec'; sleep 3; poweroff"
+CONFIG_SYS_PBSIZE=2086
+CONFIG_SPL_FOOTPRINT_LIMIT=y
+CONFIG_SPL_MAX_FOOTPRINT=0x8000
+# CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
+CONFIG_SPL_HAVE_INIT_STACK=y
+CONFIG_SPL_SYS_MALLOC=y
+CONFIG_SPL_HAS_CUSTOM_MALLOC_START=y
+CONFIG_SPL_CUSTOM_SYS_MALLOC_ADDR=0x80090000
+CONFIG_SPL_SYS_MALLOC_SIZE=0x10000
+CONFIG_SYS_PROMPT="Tegra114 (Transformer) # "
+# CONFIG_CMD_BOOTEFI_BOOTMGR is not set
+CONFIG_CMD_BOOTMENU=y
+# CONFIG_CMD_IMI is not set
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_POWEROFF=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_USB_MASS_STORAGE=y
+CONFIG_CMD_UMS_ABORT_KEYED=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_PAUSE=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_TEGRA_PARTITION=y
+# CONFIG_SPL_DOS_PARTITION is not set
+# CONFIG_SPL_EFI_PARTITION is not set
+CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SYS_MMC_ENV_PART=2
+CONFIG_BUTTON=y
+CONFIG_USB_FUNCTION_FASTBOOT=y
+CONFIG_FASTBOOT_BUF_ADDR=0x91000000
+CONFIG_FASTBOOT_BUF_SIZE=0x10000000
+CONFIG_FASTBOOT_FLASH=y
+CONFIG_FASTBOOT_FLASH_MMC_DEV=0
+CONFIG_PALMAS_GPIO=y
+CONFIG_SYS_I2C_TEGRA=y
+CONFIG_BUTTON_KEYBOARD=y
+CONFIG_DM_PMIC=y
+CONFIG_PMIC_PALMAS=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_PALMAS=y
+CONFIG_PWM_TEGRA=y
+CONFIG_SYS_NS16550=y
+CONFIG_SYSRESET_PALMAS=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_TEGRA=y
+CONFIG_USB_KEYBOARD=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_MANUFACTURER="ASUS"
+CONFIG_USB_GADGET_VENDOR_NUM=0x0b05
+CONFIG_USB_GADGET_PRODUCT_NUM=0x4daf
+CONFIG_CI_UDC=y
+CONFIG_VIDEO=y
+# CONFIG_VIDEO_FONT_8X16 is not set
+CONFIG_VIDEO_FONT_16X32=y
+# CONFIG_VIDEO_LOGO is not set
+CONFIG_VIDEO_LCD_SHARP_LQ101R1SX01=y
+CONFIG_VIDEO_BRIDGE=y
+CONFIG_VIDEO_DSI_TEGRA=y

doc/board/asus/index.rst

@@ -9,3 +9,4 @@ ASUS
    grouper
    transformer_t20
    transformer_t30
+   transformer_t114

doc/board/asus/transformer_t114.rst

@@ -0,0 +1,74 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+U-Boot for the ASUS Transformer device family
+=============================================
+
+Quick Start
+-----------
+
+- Build U-Boot
+- Boot U-Boot by loading it into RAM (coldboot)
+- Chainloading U-Boot from the vendor bootloader
+- Boot
+
+Build U-Boot
+------------
+
+U-Boot can be built in two forms: U-Boot with SPL, which is used for booting
+by loading directly into RAM and U-Boot without SPL, which can be flashed
+and chainloaded from the vendor bootloader.
+
+To build U-Boot with SPL proseed:
+
+.. code-block:: bash
+
+    $ export CROSS_COMPILE=arm-none-eabi-
+    $ make tf701t_defconfig
+    $ make
+
+After the build succeeds, you will obtain the final ``u-boot-dtb-tegra.bin``
+file, ready for cold booting by loading into RAM.
+
+To build U-Boot without SPL adjust tf701t_defconfig:
+
+.. code-block::
+
+  CONFIG_TEXT_BASE=0x80A00000
+  CONFIG_SKIP_LOWLEVEL_INIT=y
+  # CONFIG_OF_BOARD_SETUP is not set
+  CONFIG_TEGRA_SUPPORT_NON_SECURE=y
+
+After the build succeeds, you will obtain the final ``u-boot-dtb.bin`` file,
+ready for booting with fastboot boot or which can be further processed into
+a flashable boot.img.
+
+Boot U-Boot by loading it into RAM (coldboot)
+---------------------------------------------
+
+Done fairly simply by using fusee-tools (using run_bootloader.sh) and placing
+``u-boot-dtb-tegra.bin`` generated on the previous step into fusee-tools dir.
+This method requires constant access to the host PC or payloader and can fully
+eliminate influence of the vendor bootloader onto the boot process.
+
+.. code-block:: bash
+
+    $ ./run_bootloader.sh -s T114 -t ./bct/tf701t.bct
+
+Chainloading U-Boot from the vendor bootloader
+----------------------------------------------
+
+``u-boot-dtb.bin`` has to be further packed into Android boot image form,
+where ``u-boot-dtb.bin`` acts as kernel, while dtb and ramdisk parts should
+not be included. Then the generated boot image can be flashed into the /boot
+partition of the tablet using vendor bootloader's fastboot and will act as
+the bootloader of the last stage.
+
+Boot
+----
+In both cases after U-Boot obtains control it performs search of extlinux.conf
+first on the dock USB device is available, then on MicroSD card if available
+and lastly on eMMC. If none of the devices above are present, then the device
+is turned off.
+
+If during boot of U-Boot Volume Down button is pressed, the device will enter
+U-Boot bootmenu.

include/configs/transformer-t114.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2010-2013, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Copyright (c) 2023, Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#include "tegra114-common.h"
+
+#ifdef CONFIG_TEGRA_SUPPORT_NON_SECURE
+  #define CFG_PRAM			0x20000	/* 128 MB */
+#endif
+
+#include "tegra-common-post.h"
+
+#endif /* __CONFIG_H */