ARM: novena: Add Kosagi Novena board

The Kosagi Novena is an open source laptop released in 2014.

This patch adds the initial project skeleton for running the PBL
and debugging over the UART2 port (labeled DEBUG on the board.)

Signed-off-by: John Watts <contact@jookia.org>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
Link: https://lore.barebox.org/20230202075741.2350028-2-contact@jookia.org
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

10 files changed, 118 insertions, 0 deletions

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index f47aea6602..50088886eb 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_MACH_BEAGLEBONE)			+= beaglebone/
 obj-$(CONFIG_MACH_CANON_A1100)			+= canon-a1100/
 obj-$(CONFIG_MACH_CM_FX6)			+= cm-fx6/
 obj-$(CONFIG_MACH_NITROGEN6)			+= boundarydevices-nitrogen6/
+obj-$(CONFIG_MACH_NOVENA)			+= novena/
 obj-$(CONFIG_MACH_CCMX51)			+= ccxmx51/
 obj-$(CONFIG_MACH_CCMX53)			+= ccxmx53/
 obj-$(CONFIG_MACH_CFA10036)			+= crystalfontz-cfa10036/
diff --git a/arch/arm/boards/novena/Makefile b/arch/arm/boards/novena/Makefile
new file mode 100644
index 0000000000..3111392bf9
--- /dev/null
+++ b/arch/arm/boards/novena/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+obj-y += board.o
+lwl-y += lowlevel.o
diff --git a/arch/arm/boards/novena/board.c b/arch/arm/boards/novena/board.c
new file mode 100644
index 0000000000..e41ea10f8d
--- /dev/null
+++ b/arch/arm/boards/novena/board.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// SPDX-FileCopyrightText: 2023 John Watts <contact@jookia.org>
+
+#include <common.h>
+#include <deep-probe.h>
+
+static int novena_probe(struct device *dev)
+{
+	return 0;
+}
+
+static const struct of_device_id novena_of_match[] = {
+	{ .compatible = "kosagi,imx6q-novena", },
+	{ /* sentinel */ }
+};
+
+static struct driver novena_board_driver = {
+	.name = "board-novena",
+	.probe = novena_probe,
+	.of_compatible = novena_of_match,
+};
+coredevice_platform_driver(novena_board_driver);
+
+BAREBOX_DEEP_PROBE_ENABLE(novena_of_match);
diff --git a/arch/arm/boards/novena/flash-header-novena.imxcfg b/arch/arm/boards/novena/flash-header-novena.imxcfg
new file mode 100644
index 0000000000..0612542c19
--- /dev/null
+++ b/arch/arm/boards/novena/flash-header-novena.imxcfg
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+loadaddr 0x00907000
+soc imx6
+max_load_size 0x11000
+ivtofs 0x400
diff --git a/arch/arm/boards/novena/lowlevel.c b/arch/arm/boards/novena/lowlevel.c
new file mode 100644
index 0000000000..5782e598c7
--- /dev/null
+++ b/arch/arm/boards/novena/lowlevel.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// SPDX-FileCopyrightText: 2023 John Watts <contact@jookia.org>
+
+#include <asm/barebox-arm.h>
+#include <common.h>
+#include <debug_ll.h>
+#include <mach/esdctl.h>
+#include <mach/generic.h>
+#include <mach/imx6.h>
+#include <mach/iomux-mx6.h>
+#include <mach/xload.h>
+#include <soc/fsl/fsl_udc.h>
+
+#define STACK_TOP (MX6_OCRAM_BASE_ADDR + MX6_OCRAM_MAX_SIZE)
+
+extern char __dtb_z_imx6q_novena_start[];
+
+static bool running_from_ram(void)
+{
+	return (get_pc() >= MX6_MMDC_PORT01_BASE_ADDR);
+}
+
+static void setup_uart(void)
+{
+	void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR);
+	void __iomem *uart2base = IOMEM(MX6_UART2_BASE_ADDR);
+
+	/* NOTE: RX is needed for TX to work on this board */
+	imx_setup_pad(iomuxbase, MX6Q_PAD_EIM_D26__UART2_RXD);
+	imx_setup_pad(iomuxbase, MX6Q_PAD_EIM_D27__UART2_TXD);
+
+	imx6_uart_setup(uart2base);
+	pbl_set_putc(imx_uart_putc, uart2base);
+
+	pr_debug(">");
+}
+
+static void load_barebox(void)
+{
+	enum bootsource bootsrc;
+	int bootinstance;
+
+	imx6_get_boot_source(&bootsrc, &bootinstance);
+
+	if (bootsrc == BOOTSOURCE_SERIAL)
+		imx6_barebox_start_usb(IOMEM(MX6_MMDC_PORT01_BASE_ADDR));
+	else if (bootsrc == BOOTSOURCE_MMC)
+		imx6_esdhc_start_image(bootinstance);
+
+	pr_err("Unsupported boot source %i instance %i\n",
+	        bootsrc, bootinstance);
+	hang();
+}
+
+ENTRY_FUNCTION_WITHSTACK(start_imx6q_novena, STACK_TOP, r0, r1, r2)
+{
+	imx6_cpu_lowlevel_init();
+	relocate_to_current_adr();
+	setup_c();
+
+	imx6_ungate_all_peripherals();
+	setup_uart();
+
+	if (!running_from_ram())
+		load_barebox();
+	else
+		imx6q_barebox_entry(__dtb_z_imx6q_novena_start);
+}
diff --git a/arch/arm/configs/imx_v7_defconfig b/arch/arm/configs/imx_v7_defconfig
index 6110a52e48..f8deca324a 100644
--- a/arch/arm/configs/imx_v7_defconfig
+++ b/arch/arm/configs/imx_v7_defconfig
@@ -25,6 +25,7 @@ CONFIG_MACH_SABRELITE=y
 CONFIG_MACH_SABRESD=y
 CONFIG_MACH_FREESCALE_IMX6SX_SABRESDB=y
 CONFIG_MACH_NITROGEN6=y
+CONFIG_MACH_NOVENA=y
 CONFIG_MACH_SOLIDRUN_MICROSOM=y
 CONFIG_MACH_TECHNEXION_PICO_HOBBIT=y
 CONFIG_MACH_TECHNEXION_WANDBOARD=y
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 26c4a8ab99..a01ee19f68 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -46,6 +46,7 @@ lwl-$(CONFIG_MACH_MYIRTECH_X335X) += am335x-myirtech-myd.dtb.o
 lwl-$(CONFIG_MACH_NETGEAR_RN104) += armada-370-rn104-bb.dtb.o
 lwl-$(CONFIG_MACH_NETGEAR_RN2120) += armada-xp-rn2120-bb.dtb.o
 lwl-$(CONFIG_MACH_NITROGEN6) += imx6q-nitrogen6x.dtb.o imx6dl-nitrogen6x.dtb.o imx6qp-nitrogen6_max.dtb.o
+lwl-$(CONFIG_MACH_NOVENA) += imx6q-novena.dtb.o
 lwl-$(CONFIG_MACH_NVIDIA_BEAVER) += tegra30-beaver.dtb.o
 lwl-$(CONFIG_MACH_NVIDIA_JETSON) += tegra124-jetson-tk1.dtb.o
 lwl-$(CONFIG_MACH_PCA100) += imx27-phytec-phycard-s-rdk-bb.dtb.o
diff --git a/arch/arm/dts/imx6q-novena.dts b/arch/arm/dts/imx6q-novena.dts
new file mode 100644
index 0000000000..12bade849c
--- /dev/null
+++ b/arch/arm/dts/imx6q-novena.dts
@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR X11
+// SPDX-FileCopyrightText: 2023 John Watts <contact@jookia.org>
+
+#include <arm/imx6q-novena.dts>
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 774c4cacb7..912eef8290 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -434,6 +434,13 @@ config MACH_NITROGEN6
 	bool "BoundaryDevices Nitrogen6 boards"
 	select ARCH_IMX6
 
+config MACH_NOVENA
+	bool "Kosagi Novena board"
+	select ARCH_IMX6
+	select ARM_USE_COMPRESSED_DTB
+	select MCI_IMX_ESDHC_PBL
+	select USB_GADGET_DRIVER_ARC_PBL
+
 config MACH_SOLIDRUN_MICROSOM
 	bool "SolidRun MicroSOM based devices"
 	select ARCH_IMX6
diff --git a/images/Makefile.imx b/images/Makefile.imx
index e9f4ba64e4..65914212bf 100644
--- a/images/Makefile.imx
+++ b/images/Makefile.imx
@@ -258,6 +258,8 @@ $(call build_imx_habv4img, CONFIG_MACH_NITROGEN6, start_imx6dl_nitrogen6x_2g, bo
 
 $(call build_imx_habv4img, CONFIG_MACH_NITROGEN6, start_imx6qp_nitrogen6_max, boundarydevices-nitrogen6/flash-header-nitrogen6qp-max, boundarydevices-imx6qp-nitrogen6_max)
 
+$(call build_imx_habv4img, CONFIG_MACH_NOVENA, start_imx6q_novena, novena/flash-header-novena, imx6q-novena)
+
 $(call build_imx_habv4img, CONFIG_MACH_TX6X, start_imx6dl_tx6x_512m, karo-tx6x/flash-header-tx6dl-512m, karo-imx6dl-tx6x-512m)
 
 $(call build_imx_habv4img, CONFIG_MACH_TX6X, start_imx6dl_tx6x_1g, karo-tx6x/flash-header-tx6dl-1g, karo-imx6dl-tx6x-1g)