ARM: imx6: add Embest MarSBoard support

This board is produced by Embest/Element 14 and is based on i.MX6 Dual.

For more informations on this board :
http://www.embest-tech.com/shop/star/marsboard.html

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Tested-by: Stefan Lengfeld <contact@stefanchrist.eu>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

6 files changed, 214 insertions, 0 deletions

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index a814ab8239..10cd0c413d 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_MACH_EDB9315A)			+= edb93xx/
 obj-$(CONFIG_MACH_EDB9315)			+= edb93xx/
 obj-$(CONFIG_MACH_EFIKA_MX_SMARTBOOK)		+= efika-mx-smartbook/
 obj-$(CONFIG_MACH_EMBEDSKY_E9)			+= embedsky-e9/
+obj-$(CONFIG_MACH_EMBEST_MARSBOARD)		+= embest-marsboard/
 obj-$(CONFIG_MACH_EMBEST_RIOTBOARD)		+= embest-riotboard/
 obj-$(CONFIG_MACH_EUKREA_CPUIMX25)		+= eukrea_cpuimx25/
 obj-$(CONFIG_MACH_EUKREA_CPUIMX27)		+= eukrea_cpuimx27/
diff --git a/arch/arm/boards/embest-marsboard/Makefile b/arch/arm/boards/embest-marsboard/Makefile
new file mode 100644
index 0000000000..ef5219444c
--- /dev/null
+++ b/arch/arm/boards/embest-marsboard/Makefile
@@ -0,0 +1,3 @@
+obj-y += board.o
+lwl-y += lowlevel.o
+bbenv-y += defaultenv-mars
diff --git a/arch/arm/boards/embest-marsboard/board.c b/arch/arm/boards/embest-marsboard/board.c
new file mode 100644
index 0000000000..66893434c2
--- /dev/null
+++ b/arch/arm/boards/embest-marsboard/board.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2013 Lucas Stach <l.stach@pengutronix.de>
+ * Copyright (C) 2014 Eric Bénard <eric@eukrea.com>
+ * Copyright (C) 2019 Ahmad Fatoum <a.fatoum@pengutronix.de>
+ */
+
+#include <common.h>
+#include <init.h>
+#include <envfs.h>
+#include <mach/bbu.h>
+#include <linux/phy.h>
+
+static int ar8035_phy_fixup(struct phy_device *dev)
+{
+	u16 val;
+
+	/* Ar803x phy SmartEEE feature cause link status generates glitch,
+	 * which cause ethernet link down/up issue, so disable SmartEEE
+	 */
+	phy_write(dev, 0xd, 0x3);
+	phy_write(dev, 0xe, 0x805d);
+	phy_write(dev, 0xd, 0x4003);
+
+	val = phy_read(dev, 0xe);
+	phy_write(dev, 0xe, val & ~(1 << 8));
+
+	/* To enable AR8031 ouput a 125MHz clk from CLK_25M */
+	phy_write(dev, 0xd, 0x7);
+	phy_write(dev, 0xe, 0x8016);
+	phy_write(dev, 0xd, 0x4007);
+
+	val = phy_read(dev, 0xe);
+	val &= 0xffe3;
+	val |= 0x18;
+	phy_write(dev, 0xe, val);
+
+	/* introduce tx clock delay */
+	phy_write(dev, 0x1d, 0x5);
+	val = phy_read(dev, 0x1e);
+	val |= 0x0100;
+	phy_write(dev, 0x1e, val);
+
+	return 0;
+}
+
+static int marsboard_device_init(void)
+{
+	if (!of_machine_is_compatible("embest,imx6q-marsboard"))
+		return 0;
+
+	barebox_set_hostname("marsboard");
+
+	phy_register_fixup_for_uid(0x004dd072, 0xffffffef, ar8035_phy_fixup);
+
+	imx6_bbu_internal_spi_i2c_register_handler("spiflash",
+		"/dev/m25p0.barebox", BBU_HANDLER_FLAG_DEFAULT);
+
+	defaultenv_append_directory(defaultenv_mars);
+
+	return 0;
+}
+device_initcall(marsboard_device_init);
diff --git a/arch/arm/boards/embest-marsboard/defaultenv-mars/init/fastboot b/arch/arm/boards/embest-marsboard/defaultenv-mars/init/fastboot
new file mode 100644
index 0000000000..9c784fb73b
--- /dev/null
+++ b/arch/arm/boards/embest-marsboard/defaultenv-mars/init/fastboot
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ "$bootsource" != "serial" ]; then
+    exit 0
+fi
+
+usbgadget -a -A "" -b
diff --git a/arch/arm/boards/embest-marsboard/flash-header-embest-marsboard.imxcfg b/arch/arm/boards/embest-marsboard/flash-header-embest-marsboard.imxcfg
new file mode 100644
index 0000000000..bdaf60cb4a
--- /dev/null
+++ b/arch/arm/boards/embest-marsboard/flash-header-embest-marsboard.imxcfg
@@ -0,0 +1,99 @@
+soc imx6
+loadaddr 0x20000000
+dcdofs 0x400
+
+wm 32 0x020e05a8 0x00000030
+wm 32 0x020e05b0 0x00000030
+wm 32 0x020e0524 0x00000030
+wm 32 0x020e051c 0x00000030
+wm 32 0x020e0518 0x00000030
+wm 32 0x020e050c 0x00000030
+wm 32 0x020e05b8 0x00000030
+wm 32 0x020e05c0 0x00000030
+wm 32 0x020e05ac 0x00020030
+wm 32 0x020e05b4 0x00020030
+wm 32 0x020e0528 0x00020030
+wm 32 0x020e0520 0x00020030
+wm 32 0x020e0514 0x00020030
+wm 32 0x020e0510 0x00020030
+wm 32 0x020e05bc 0x00020030
+wm 32 0x020e05c4 0x00020030
+wm 32 0x020e056c 0x00020030
+wm 32 0x020e0578 0x00020030
+wm 32 0x020e0588 0x00020030
+wm 32 0x020e0594 0x00020030
+wm 32 0x020e057c 0x00020030
+wm 32 0x020e0590 0x00003000
+wm 32 0x020e0598 0x00003000
+wm 32 0x020e058c 0x00000000
+wm 32 0x020e059c 0x00003030
+wm 32 0x020e05a0 0x00003030
+wm 32 0x020e0784 0x00000030
+wm 32 0x020e0788 0x00000030
+wm 32 0x020e0794 0x00000030
+wm 32 0x020e079c 0x00000030
+wm 32 0x020e07a0 0x00000030
+wm 32 0x020e07a4 0x00000030
+wm 32 0x020e07a8 0x00000030
+wm 32 0x020e0748 0x00000030
+wm 32 0x020e074c 0x00000030
+wm 32 0x020e0750 0x00020000
+wm 32 0x020e0758 0x00000000
+wm 32 0x020e0774 0x00020000
+wm 32 0x020e078c 0x00000030
+wm 32 0x020e0798 0x000c0000
+wm 32 0x021b081c 0x33333333
+wm 32 0x021b0820 0x33333333
+wm 32 0x021b0824 0x33333333
+wm 32 0x021b0828 0x33333333
+wm 32 0x021b481c 0x33333333
+wm 32 0x021b4820 0x33333333
+wm 32 0x021b4824 0x33333333
+wm 32 0x021b4828 0x33333333
+wm 32 0x021b0018 0x00081740
+wm 32 0x021b001c 0x00008000
+wm 32 0x021b000c 0x555a7975
+wm 32 0x021b0010 0xff538e64
+wm 32 0x021b0014 0x01ff00db
+wm 32 0x021b002c 0x000026d2
+wm 32 0x021b0030 0x005b0e21
+wm 32 0x021b0008 0x09444040
+wm 32 0x021b0004 0x00025576
+wm 32 0x021b0040 0x00000027
+wm 32 0x021b0000 0x831a0000
+wm 32 0x021b001c 0x04088032
+wm 32 0x021b001c 0x0408803a
+wm 32 0x021b001c 0x00008033
+wm 32 0x021b001c 0x0000803b
+wm 32 0x021b001c 0x00428031
+wm 32 0x021b001c 0x00428039
+wm 32 0x021b001c 0x09408030
+wm 32 0x021b001c 0x09408038
+wm 32 0x021b001c 0x04008040
+wm 32 0x021b001c 0x04008048
+wm 32 0x021b0800 0xa1380003
+wm 32 0x021b4800 0xa1380003
+wm 32 0x021b0020 0x00005800
+wm 32 0x021b0818 0x00022227
+wm 32 0x021b4818 0x00022227
+wm 32 0x021b083c 0x434b0350
+wm 32 0x021b0840 0x034c0359
+wm 32 0x021b483c 0x434b0350
+wm 32 0x021b4840 0x03650348
+wm 32 0x021b0848 0x4436383b
+wm 32 0x021b4848 0x39393341
+wm 32 0x021b0850 0x35373933
+wm 32 0x021b4850 0x48254A36
+wm 32 0x021b080c 0x001f001f
+wm 32 0x021b0810 0x001f001f
+wm 32 0x021b480c 0x00440044
+wm 32 0x021b4810 0x00440044
+wm 32 0x021b08b8 0x00000800
+wm 32 0x021b48b8 0x00000800
+wm 32 0x021b001c 0x00000000
+wm 32 0x021b0404 0x00011006
+wm 32 0x020c4068 0x00c03f3f
+wm 32 0x020c406c 0x0030fc03
+wm 32 0x020c4070 0x0fffc000
+wm 32 0x020c4074 0x3ff00000
+wm 32 0x020c4078 0x00fff300
diff --git a/arch/arm/boards/embest-marsboard/lowlevel.c b/arch/arm/boards/embest-marsboard/lowlevel.c
new file mode 100644
index 0000000000..9e20a2ec06
--- /dev/null
+++ b/arch/arm/boards/embest-marsboard/lowlevel.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Ahmad Fatoum - Pengutronix
+ */
+
+#include <common.h>
+#include <io.h>
+#include <asm/barebox-arm.h>
+#include <mach/imx6.h>
+#include <mach/esdctl.h>
+#include <mach/iomux-mx6.h>
+#include <debug_ll.h>
+
+static inline void setup_uart(void)
+{
+	void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR);
+
+	imx6_ungate_all_peripherals();
+
+	imx_setup_pad(iomuxbase, MX6Q_PAD_EIM_D26__UART2_TXD);
+
+	imx6_uart_setup_ll();
+
+	putc_ll('>');
+}
+
+extern char __dtb_z_imx6q_marsboard_start[];
+
+ENTRY_FUNCTION(start_imx6q_marsboard, r0, r1, r2)
+{
+	void *fdt;
+
+	imx6_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	fdt = __dtb_z_imx6q_marsboard_start + get_runtime_offset();
+
+	imx6q_barebox_entry(fdt);
+}