gemini: add 4.14 support

This adds the patches to get fairly complete Gemini support
using kernel v4.14. It is mainly a backport of patches from
kernel v4.16 with omissions of things like graphics that require
substantial changes and will be better handled once we move
to the v4.16 kernel proper.
On top of this are some WIP patches for USB support.

Tested on Raidsonic NAS4220B and D-link DNS-313.

ChangeLog v4->v5:
- Fix ethernet single gmac usecase
- Fix USB reset (patch from Hans)
- Fix Raidsonic ethernet skew delay
- Fix kernel config (bridge, squashfs, jffs2, usb)
- Disable second usb port on Raidsonic board until fotg210_hcd is fixed

ChangeLog v3->v4:
- Make sure to use tabs rather than spaces in base-files.
- Use the dns313 image tool from the firmware-utils.
- Break out the addition of the v4.14 patches and the removal
  of the v4.4 patches to separate (big) patches.

ChangeLog v2->v3:
- Update the kernel config as indicated by Hauke Martens:
- Regenerate again after rebasing using kernel_oldconfig
  dropping a few optimization settings that are now generic
- Drop CFG80211 stuff (module)
- Drop CIFS stuff (module)
- Drop MAC80211 (module)
- Drop wireless drivers (module)
- Enabled OverlayFS
- Added proper DNS-313 boot image generation with the special
  file header tool.
- Disable CMA in the kernel
- Enable LZMA compression of the kernel
- Consequently name the nas4220b images nas4220b
- Update preinit MAC detection script to handle also DNS-313
- Add board.d/03_hdparm to set the disk to spin down after
  1 minute by default, if we have the hdparm tool installed

ChangeLog v1->v2:
- Processed config through kernel_oldconfig
- Processed patches through make target/linux/{clean,refresh} V=99

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Roman Yeryomin <roman@advem.lv>

1 files changed, 113 insertions, 0 deletions

diff --git a/target/linux/gemini/patches-4.14/0020-soc-Add-SoC-driver-for-Gemini.patch b/target/linux/gemini/patches-4.14/0020-soc-Add-SoC-driver-for-Gemini.patch
new file mode 100644
index 0000000000..f1bbe0a15f
--- /dev/null
+++ b/target/linux/gemini/patches-4.14/0020-soc-Add-SoC-driver-for-Gemini.patch
@@ -0,0 +1,113 @@
+From b0a88a861b036124ef2d6acfe6dd87cfde63e750 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Fri, 22 Dec 2017 00:19:08 +0100
+Subject: [PATCH 20/31] soc: Add SoC driver for Gemini
+
+This adds an SoC driver for the Gemini. Currently there
+is only one thing not fitting into any other framework,
+and that is the bus arbitration setting.
+
+All Gemini vendor trees seem to be setting this register to
+exactly the same arbitration so we just add a small code
+snippet to do this at subsys_init() time before any other
+drivers kick in.
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+---
+ drivers/soc/Makefile            |  1 +
+ drivers/soc/gemini/Makefile     |  2 ++
+ drivers/soc/gemini/soc-gemini.c | 71 +++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 74 insertions(+)
+ create mode 100644 drivers/soc/gemini/Makefile
+ create mode 100644 drivers/soc/gemini/soc-gemini.c
+
+--- a/drivers/soc/Makefile
++++ b/drivers/soc/Makefile
+@@ -9,6 +9,7 @@ obj-y				+= bcm/
+ obj-$(CONFIG_ARCH_DOVE)		+= dove/
+ obj-$(CONFIG_MACH_DOVE)		+= dove/
+ obj-y				+= fsl/
++obj-$(CONFIG_ARCH_GEMINI)	+= gemini/
+ obj-$(CONFIG_ARCH_MXC)		+= imx/
+ obj-$(CONFIG_SOC_XWAY)		+= lantiq/
+ obj-$(CONFIG_ARCH_MEDIATEK)	+= mediatek/
+--- /dev/null
++++ b/drivers/soc/gemini/Makefile
+@@ -0,0 +1,2 @@
++# SPDX-License-Identifier: GPL-2.0
++obj-y	+= soc-gemini.o
+--- /dev/null
++++ b/drivers/soc/gemini/soc-gemini.c
+@@ -0,0 +1,71 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * Copyright (C) 2017 Linaro Ltd.
++ *
++ * Author: Linus Walleij <linus.walleij@linaro.org>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2, as
++ * published by the Free Software Foundation.
++ *
++ */
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/mfd/syscon.h>
++#include <linux/regmap.h>
++#include <linux/of.h>
++
++#define GLOBAL_WORD_ID				0x00
++#define GEMINI_GLOBAL_ARB1_CTRL			0x2c
++#define GEMINI_ARB1_BURST_MASK			GENMASK(21, 16)
++#define GEMINI_ARB1_BURST_SHIFT			16
++/* These all define the priority on the BUS2 backplane */
++#define GEMINI_ARB1_PRIO_MASK			GENMASK(9, 0)
++#define GEMINI_ARB1_DMAC_HIGH_PRIO		BIT(0)
++#define GEMINI_ARB1_IDE_HIGH_PRIO		BIT(1)
++#define GEMINI_ARB1_RAID_HIGH_PRIO		BIT(2)
++#define GEMINI_ARB1_SECURITY_HIGH_PRIO		BIT(3)
++#define GEMINI_ARB1_GMAC0_HIGH_PRIO		BIT(4)
++#define GEMINI_ARB1_GMAC1_HIGH_PRIO		BIT(5)
++#define GEMINI_ARB1_USB0_HIGH_PRIO		BIT(6)
++#define GEMINI_ARB1_USB1_HIGH_PRIO		BIT(7)
++#define GEMINI_ARB1_PCI_HIGH_PRIO		BIT(8)
++#define GEMINI_ARB1_TVE_HIGH_PRIO		BIT(9)
++
++#define GEMINI_DEFAULT_BURST_SIZE		0x20
++#define GEMINI_DEFAULT_PRIO			(GEMINI_ARB1_GMAC0_HIGH_PRIO | \
++						 GEMINI_ARB1_GMAC1_HIGH_PRIO)
++
++static int __init gemini_soc_init(void)
++{
++	struct regmap *map;
++	u32 rev;
++	u32 val;
++	int ret;
++
++	/* Multiplatform guard, only proceed on Gemini */
++	if (!of_machine_is_compatible("cortina,gemini"))
++		return 0;
++
++	map = syscon_regmap_lookup_by_compatible("cortina,gemini-syscon");
++	if (IS_ERR(map))
++		return PTR_ERR(map);
++	ret = regmap_read(map, GLOBAL_WORD_ID, &rev);
++	if (ret)
++		return ret;
++
++	val = (GEMINI_DEFAULT_BURST_SIZE << GEMINI_ARB1_BURST_SHIFT) |
++		GEMINI_DEFAULT_PRIO;
++
++	/* Set up system arbitration */
++	regmap_update_bits(map,
++			   GEMINI_GLOBAL_ARB1_CTRL,
++			   GEMINI_ARB1_BURST_MASK | GEMINI_ARB1_PRIO_MASK,
++			   val);
++
++	pr_info("Gemini SoC %04x revision %02x, set arbitration %08x\n",
++		rev >> 8, rev & 0xff, val);
++
++	return 0;
++}
++subsys_initcall(gemini_soc_init);