mainboard/pine64/rockpro64: Add initial ROCKPro64 support

This adds initial support for the Pine64 ROCKPro64 board.

The ROCKPro64 (http://pine64.org/rockpro64) is a SBC using the
RK3399 SoC with up to 4GB LPDDR4.

So far only the bootblock part works, the romstage starts to execute,
though.

For ramstage to work we'll need to port some of the changes required
for LPDDR4 vs LPDDR3. This will be addressed in follow up changes.

UART2 on the PI-2 connector can be used as a coreboot console.

  GND is pin 6
  TXD is pin 8
  RXD is pin 10

Flashing:
  I used an OpenWRT nightly for the ROCKPro64 and its builtin tool.

  $ mtd write coreboot.rom /dev/mtd0

Recovering from a bad flash:
  To recover from a bad flash bridging pins 23 and 25 on the PI-2
  connector will make the board boot from SD card.

Signed-off-by: Moritz Fischer <moritzf@google.com>
Change-Id: I47d0031fff8ee10b11ad74935eaeb05f1f7eb4b3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50625
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/pine64/Kconfig

@@ -0,0 +1,17 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+if VENDOR_PINE64
+
+choice
+	prompt "Mainboard model"
+
+source "src/mainboard/pine64/*/Kconfig.name"
+
+endchoice
+
+source "src/mainboard/pine64/*/Kconfig"
+
+config MAINBOARD_VENDOR
+	default "Pine64"
+
+endif # VENDOR_PINE64

src/mainboard/pine64/Kconfig.name

@@ -0,0 +1,2 @@
+config VENDOR_PINE64
+	bool "Pine64"

src/mainboard/pine64/rockpro64/Kconfig

@@ -0,0 +1,36 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+if BOARD_PINE64_ROCKPRO64
+
+config BOARD_SPECIFIC_OPTIONS
+	def_bool y
+	select BOARD_ROMSIZE_KB_16384
+	select COMMON_CBFS_SPI_WRAPPER
+	select SOC_ROCKCHIP_RK3399
+	select SPI_FLASH
+	select SPI_FLASH_GIGADEVICE
+
+config MAINBOARD_DIR
+	string
+	default "pine64/rockpro64"
+
+config BOOT_DEVICE_SPI_FLASH_BUS
+	int
+	default 1
+
+config CONSOLE_SERIAL_UART_ADDRESS
+	hex
+	depends on DRIVERS_UART
+	default 0xFF1A0000
+
+##########################################################
+#### Update below when adding a new derivative board. ####
+##########################################################
+config DEVICETREE
+	string
+	default "devicetree.cb" if BOARD_PINE64_ROCKPRO64
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "ROCKPro64" if BOARD_PINE64_ROCKPRO64
+endif # BOARD_PINE64_ROCKPRO64

src/mainboard/pine64/rockpro64/Kconfig.name

@@ -0,0 +1,2 @@
+config BOARD_PINE64_ROCKPRO64
+	bool "ROCKPro64"

src/mainboard/pine64/rockpro64/Makefile.inc

@@ -0,0 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+all-y += reset.c
+
+bootblock-y += bootblock.c

src/mainboard/pine64/rockpro64/board.h

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __COREBOOT_SRC_MAINBOARD_PINE64_ROCKPRO64_BOARD_H
+#define __COREBOOT_SRC_MAINBOARD_PINE64_ROCKPRO64_BOARD_H
+
+#include <gpio.h>
+
+#define GPIO_RESET	GPIO(1, A, 6)
+
+#endif  /* ! __COREBOOT_SRC_MAINBOARD_PINE64_ROCKPRO64_BOARD_H */

src/mainboard/pine64/rockpro64/board_info.txt

@@ -0,0 +1,6 @@
+Vendor name: Pine64
+Board name: ROCKPro64
+Category: sbc
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: n

src/mainboard/pine64/rockpro64/bootblock.c

@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/mmio.h>
+#include <bootblock_common.h>
+#include <soc/grf.h>
+#include <gpio.h>
+#include <soc/spi.h>
+
+void bootblock_mainboard_early_init(void)
+{
+	if (CONFIG(CONSOLE_SERIAL)) {
+		_Static_assert(CONFIG_CONSOLE_SERIAL_UART_ADDRESS == UART2_BASE,
+			       "CONSOLE_SERIAL_UART should be UART2");
+
+		/* iomux: select gpio4c[4:3] as uart2 dbg port */
+		write32(&rk3399_grf->iomux_uart2c, IOMUX_UART2C);
+
+		/* grf soc_con7[11:10] use for uart2 select */
+		write32(&rk3399_grf->soc_con7, UART2C_SEL);
+	}
+}
+
+static void configure_spi_flash(void)
+{
+	gpio_input(GPIO(1, A, 7)); /* SPI1_MISO remove pull-up */
+	gpio_input(GPIO(1, B, 0)); /* SPI1_MOSI remove pull-up */
+	gpio_input(GPIO(1, B, 1)); /* SPI1_CLK remove pull-up */
+	gpio_input(GPIO(1, B, 2)); /* SPI1_CS remove pull-up */
+
+	rockchip_spi_init(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, 33 * MHz);
+	rockchip_spi_set_sample_delay(CONFIG_BOOT_DEVICE_SPI_FLASH_BUS, 5);
+
+	write32(&rk3399_pmugrf->spi1_rxd, IOMUX_SPI1_RX);
+	write32(&rk3399_pmugrf->spi1_csclktx, IOMUX_SPI1_CSCLKTX);
+}
+
+void bootblock_mainboard_init(void)
+{
+	configure_spi_flash();
+}

src/mainboard/pine64/rockpro64/devicetree.cb

@@ -0,0 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+chip soc/rockchip/rk3399
+	device cpu_cluster 0 on end
+end

src/mainboard/pine64/rockpro64/reset.c

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <gpio.h>
+#include <reset.h>
+
+#include "board.h"
+
+void do_board_reset(void)
+{
+	gpio_output(GPIO_RESET, 1);
+}