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, 131 insertions, 0 deletions

diff --git a/target/linux/gemini/patches-4.14/0030-usb-host-fotg2-add-Gemini-specific-handling.patch b/target/linux/gemini/patches-4.14/0030-usb-host-fotg2-add-Gemini-specific-handling.patch
new file mode 100644
index 0000000000..2e781e403d
--- /dev/null
+++ b/target/linux/gemini/patches-4.14/0030-usb-host-fotg2-add-Gemini-specific-handling.patch
@@ -0,0 +1,131 @@
+From e8ede0f62b39a3d3b06ae3dc04a74680a1f0a64b Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Fri, 21 Apr 2017 22:19:00 +0200
+Subject: [PATCH 30/31] usb: host: fotg2: add Gemini-specific handling
+
+The Cortina Systems Gemini has bolted on a PHY inside the
+silicon that can be handled by six bits in a MISC register in
+the system controller.
+
+If we are running on Gemini, look up a syscon regmap through
+a phandle and enable VBUS and optionally the Mini-B connector.
+
+If the device is flagged as "wakeup-source" using the standard
+DT bindings, we also enable this in the global controller for
+respective port.
+
+Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
+---
+ drivers/usb/host/Kconfig       |  1 +
+ drivers/usb/host/fotg210-hcd.c | 76 ++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 77 insertions(+)
+
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -375,6 +375,7 @@ config USB_ISP1362_HCD
+ config USB_FOTG210_HCD
+ 	tristate "FOTG210 HCD support"
+ 	depends on USB && HAS_DMA && HAS_IOMEM
++	select MFD_SYSCON
+ 	---help---
+ 	  Faraday FOTG210 is an OTG controller which can be configured as
+ 	  an USB2.0 host. It is designed to meet USB2.0 EHCI specification
+--- a/drivers/usb/host/fotg210-hcd.c
++++ b/drivers/usb/host/fotg210-hcd.c
+@@ -46,6 +46,10 @@
+ #include <linux/platform_device.h>
+ #include <linux/io.h>
+ #include <linux/clk.h>
++#include <linux/bitops.h>
++/* For Cortina Gemini */
++#include <linux/mfd/syscon.h>
++#include <linux/regmap.h>
+ 
+ #include <asm/byteorder.h>
+ #include <asm/irq.h>
+@@ -5583,6 +5587,72 @@ static void fotg210_init(struct fotg210_
+ 	iowrite32(value, &fotg210->regs->otgcsr);
+ }
+ 
++/*
++ * Gemini-specific initialization function, only executed on the
++ * Gemini SoC using the global misc control register.
++ */
++#define GEMINI_GLOBAL_MISC_CTRL		0x30
++#define GEMINI_MISC_USB0_WAKEUP		BIT(14)
++#define GEMINI_MISC_USB1_WAKEUP		BIT(15)
++#define GEMINI_MISC_USB0_VBUS_ON	BIT(22)
++#define GEMINI_MISC_USB1_VBUS_ON	BIT(23)
++#define GEMINI_MISC_USB0_MINI_B		BIT(29)
++#define GEMINI_MISC_USB1_MINI_B		BIT(30)
++
++static int fotg210_gemini_init(struct device *dev, struct usb_hcd *hcd)
++{
++	struct device_node *np = dev->of_node;
++	struct regmap *map;
++	bool mini_b;
++	bool wakeup;
++	u32 mask, val;
++	int ret;
++
++	map = syscon_regmap_lookup_by_phandle(np, "syscon");
++	if (IS_ERR(map)) {
++		dev_err(dev, "no syscon\n");
++		return PTR_ERR(map);
++	}
++	mini_b = of_property_read_bool(np, "cortina,gemini-mini-b");
++	wakeup = of_property_read_bool(np, "wakeup-source");
++
++	/*
++	 * Figure out if this is USB0 or USB1 by simply checking the
++	 * physical base address.
++	 */
++	mask = 0;
++	if (hcd->rsrc_start == 0x69000000) {
++		val = GEMINI_MISC_USB1_VBUS_ON;
++		if (mini_b)
++			val |= GEMINI_MISC_USB1_MINI_B;
++		else
++			mask |= GEMINI_MISC_USB1_MINI_B;
++		if (wakeup)
++			val |= GEMINI_MISC_USB1_WAKEUP;
++		else
++			mask |= GEMINI_MISC_USB1_WAKEUP;
++	} else {
++		val = GEMINI_MISC_USB0_VBUS_ON;
++		if (mini_b)
++			val |= GEMINI_MISC_USB0_MINI_B;
++		else
++			mask |= GEMINI_MISC_USB0_MINI_B;
++		if (wakeup)
++			val |= GEMINI_MISC_USB0_WAKEUP;
++		else
++			mask |= GEMINI_MISC_USB0_WAKEUP;
++	}
++
++	ret = regmap_update_bits(map, GEMINI_GLOBAL_MISC_CTRL, mask, val);
++	if (ret) {
++		dev_err(dev, "failed to initialize Gemini PHY\n");
++		return ret;
++	}
++
++	dev_info(dev, "initialized Gemini PHY\n");
++	return 0;
++}
++
+ /**
+  * fotg210_hcd_probe - initialize faraday FOTG210 HCDs
+  *
+@@ -5662,6 +5732,12 @@ static int fotg210_hcd_probe(struct plat
+ 
+ 	fotg210_init(fotg210);
+ 
++	if (of_device_is_compatible(dev->of_node, "cortina,gemini-usb")) {
++		retval = fotg210_gemini_init(dev, hcd);
++		if (retval)
++			goto failed_dis_clk;
++	}
++
+ 	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ 	if (retval) {
+ 		dev_err(dev, "failed to add hcd with err %d\n", retval);