ipq806x: switch to upstream usb driver and backport fixes

Also removing fifo-resize property drom DT as it has been removed from the driver.

Signed-off-by: Pavel Kubelun <be.dissent@gmail.com>

18 files changed, 1094 insertions, 23 deletions

diff --git a/target/linux/ipq806x/Makefile b/target/linux/ipq806x/Makefile
index 27ad6a4a06..3a65d334aa 100644
--- a/target/linux/ipq806x/Makefile
+++ b/target/linux/ipq806x/Makefile
@@ -19,7 +19,7 @@ DEFAULT_PACKAGES += \
 	kmod-leds-gpio kmod-gpio-button-hotplug swconfig \
 	kmod-ata-core kmod-ata-ahci kmod-ata-ahci-platform \
 	kmod-usb-core kmod-usb-ohci kmod-usb2 kmod-usb-ledtrig-usbport \
-	kmod-usb3 kmod-usb-dwc3-qcom kmod-usb-phy-qcom-dwc3 \
+	kmod-usb3 kmod-usb-dwc3-of-simple kmod-usb-phy-qcom-dwc3 \
 	kmod-ath10k wpad-mini \
 	uboot-envtools
 
diff --git a/target/linux/ipq806x/files/arch/arm/boot/dts/qcom-ipq8065.dtsi b/target/linux/ipq806x/files/arch/arm/boot/dts/qcom-ipq8065.dtsi
index 435692b183..e0ba99a41c 100644
--- a/target/linux/ipq806x/files/arch/arm/boot/dts/qcom-ipq8065.dtsi
+++ b/target/linux/ipq806x/files/arch/arm/boot/dts/qcom-ipq8065.dtsi
@@ -790,7 +790,6 @@
 				interrupts = <0 110 0x4>;
 				phys = <&hs_phy_0>, <&ss_phy_0>;
 				phy-names = "usb2-phy", "usb3-phy";
-				tx-fifo-resize;
 				dr_mode = "host";
 			};
 		};
@@ -812,7 +811,6 @@
 				interrupts = <0 205 0x4>;
 				phys = <&hs_phy_1>, <&ss_phy_1>;
 				phy-names = "usb2-phy", "usb3-phy";
-				tx-fifo-resize;
 				dr_mode = "host";
 			};
 		};
diff --git a/target/linux/ipq806x/modules.mk b/target/linux/ipq806x/modules.mk
index 38dd195902..6f1ca2d2a4 100644
--- a/target/linux/ipq806x/modules.mk
+++ b/target/linux/ipq806x/modules.mk
@@ -29,20 +29,3 @@ define KernelPackage/usb-phy-qcom-dwc3/description
 endef
 
 $(eval $(call KernelPackage,usb-phy-qcom-dwc3))
-
-
-define KernelPackage/usb-dwc3-qcom
-  TITLE:=DWC3 USB QCOM controller driver
-  DEPENDS:=@TARGET_ipq806x +kmod-usb-dwc3 +kmod-usb-phy-qcom-dwc3
-  KCONFIG:= CONFIG_USB_DWC3_QCOM
-  FILES:= $(LINUX_DIR)/drivers/usb/dwc3/dwc3-qcom.ko
-  AUTOLOAD:=$(call AutoLoad,53,dwc3-qcom,1)
-  $(call AddDepends/usb)
-endef
-
-define KernelPackage/usb-dwc3-qcom/description
- This driver provides support for the integrated DesignWare
- USB3 IP Core within the QCOM SoCs.
-endef
-
-$(eval $(call KernelPackage,usb-dwc3-qcom))
diff --git a/target/linux/ipq806x/patches-4.4/096-01-usb-dwc3-core-purge-dev_dbg-calls.patch b/target/linux/ipq806x/patches-4.4/096-01-usb-dwc3-core-purge-dev_dbg-calls.patch
new file mode 100644
index 0000000000..b940827529
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-01-usb-dwc3-core-purge-dev_dbg-calls.patch
@@ -0,0 +1,46 @@
+From 1407bf13e3bf5f1168484c3e68b6ef9d8cf2bc72 Mon Sep 17 00:00:00 2001
+From: Felipe Balbi <balbi@ti.com>
+Date: Mon, 16 Nov 2015 16:06:37 -0600
+Subject: usb: dwc3: core: purge dev_dbg() calls
+
+The last few dev_dbg() messages are converted to
+tracepoints and we can finally ignore dev_dbg()
+messages during debug sessions.
+
+Signed-off-by: Felipe Balbi <balbi@ti.com>
+---
+ drivers/usb/dwc3/core.c | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index 22b47973..de5e01f 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -272,7 +272,8 @@ static int dwc3_event_buffers_setup(struct dwc3 *dwc)
+ 
+ 	for (n = 0; n < dwc->num_event_buffers; n++) {
+ 		evt = dwc->ev_buffs[n];
+-		dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n",
++		dwc3_trace(trace_dwc3_core,
++				"Event buf %p dma %08llx length %d\n",
+ 				evt->buf, (unsigned long long) evt->dma,
+ 				evt->length);
+ 
+@@ -608,12 +609,13 @@ static int dwc3_core_init(struct dwc3 *dwc)
+ 		reg |= DWC3_GCTL_GBLHIBERNATIONEN;
+ 		break;
+ 	default:
+-		dev_dbg(dwc->dev, "No power optimization available\n");
++		dwc3_trace(trace_dwc3_core, "No power optimization available\n");
+ 	}
+ 
+ 	/* check if current dwc3 is on simulation board */
+ 	if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) {
+-		dev_dbg(dwc->dev, "it is on FPGA board\n");
++		dwc3_trace(trace_dwc3_core,
++				"running on FPGA platform\n");
+ 		dwc->is_fpga = true;
+ 	}
+ 
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-02-usb-dwc3-Update-maximum_speed-for-SuperSpeedPlus.patch b/target/linux/ipq806x/patches-4.4/096-02-usb-dwc3-Update-maximum_speed-for-SuperSpeedPlus.patch
new file mode 100644
index 0000000000..9575166f74
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-02-usb-dwc3-Update-maximum_speed-for-SuperSpeedPlus.patch
@@ -0,0 +1,56 @@
+From 2c7f1bd9127a1a49ee25d9c2b2ce17b11c7fb05f Mon Sep 17 00:00:00 2001
+From: John Youn <John.Youn@synopsys.com>
+Date: Fri, 5 Feb 2016 17:08:59 -0800
+Subject: usb: dwc3: Update maximum_speed for SuperSpeedPlus
+
+If the maximum_speed is not set, set it to a known value, either
+SuperSpeed or SuperSpeedPlus based on the type of controller we are
+using. If we are on DWC_usb31 controller, check the PHY interface to see
+if it is capable of SuperSpeedPlus.
+
+Also this check is moved after dwc3_core_init() so that we can check
+dwc->revision.
+
+Signed-off-by: John Youn <johnyoun@synopsys.com>
+Signed-off-by: Felipe Balbi <balbi@kernel.org>
+---
+ drivers/usb/dwc3/core.c | 17 +++++++++++++----
+ 1 file changed, 13 insertions(+), 4 deletions(-)
+
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index de5e01f..001c755 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -962,10 +962,6 @@ static int dwc3_probe(struct platform_device *pdev)
+ 		fladj = pdata->fladj_value;
+ 	}
+ 
+-	/* default to superspeed if no maximum_speed passed */
+-	if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
+-		dwc->maximum_speed = USB_SPEED_SUPER;
+-
+ 	dwc->lpm_nyet_threshold = lpm_nyet_threshold;
+ 	dwc->tx_de_emphasis = tx_de_emphasis;
+ 
+@@ -1016,6 +1012,19 @@ static int dwc3_probe(struct platform_device *pdev)
+ 		goto err1;
+ 	}
+ 
++	/* default to superspeed if no maximum_speed passed */
++	if (dwc->maximum_speed == USB_SPEED_UNKNOWN) {
++		dwc->maximum_speed = USB_SPEED_SUPER;
++
++		/*
++		 * default to superspeed plus if we are capable.
++		 */
++		if (dwc3_is_usb31(dwc) &&
++		    (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
++		     DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
++			dwc->maximum_speed = USB_SPEED_SUPER_PLUS;
++	}
++
+ 	/* Adjust Frame Length */
+ 	dwc3_frame_length_adjustment(dwc, fladj);
+ 
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-03-usb-dwc3-Validate-the-maximum_speed-parameter.patch b/target/linux/ipq806x/patches-4.4/096-03-usb-dwc3-Validate-the-maximum_speed-parameter.patch
new file mode 100644
index 0000000000..43821266a1
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-03-usb-dwc3-Validate-the-maximum_speed-parameter.patch
@@ -0,0 +1,74 @@
+From 77966eb85e6d988a6daaf8ac14ac33026ceb3ab7 Mon Sep 17 00:00:00 2001
+From: John Youn <John.Youn@synopsys.com>
+Date: Fri, 19 Feb 2016 17:31:01 -0800
+Subject: usb: dwc3: Validate the maximum_speed parameter
+
+Check that dwc->maximum_speed is set to a valid value. Also add an error
+when we use it later if we encounter an invalid value.
+
+Signed-off-by: John Youn <johnyoun@synopsys.com>
+Signed-off-by: Felipe Balbi <balbi@kernel.org>
+---
+ drivers/usb/dwc3/core.c   | 18 ++++++++++++++++--
+ drivers/usb/dwc3/gadget.c |  9 ++++++---
+ 2 files changed, 22 insertions(+), 5 deletions(-)
+
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index 001c755..17fd814 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -1012,8 +1012,20 @@ static int dwc3_probe(struct platform_device *pdev)
+ 		goto err1;
+ 	}
+ 
+-	/* default to superspeed if no maximum_speed passed */
+-	if (dwc->maximum_speed == USB_SPEED_UNKNOWN) {
++	/* Check the maximum_speed parameter */
++	switch (dwc->maximum_speed) {
++	case USB_SPEED_LOW:
++	case USB_SPEED_FULL:
++	case USB_SPEED_HIGH:
++	case USB_SPEED_SUPER:
++	case USB_SPEED_SUPER_PLUS:
++		break;
++	default:
++		dev_err(dev, "invalid maximum_speed parameter %d\n",
++			dwc->maximum_speed);
++		/* fall through */
++	case USB_SPEED_UNKNOWN:
++		/* default to superspeed */
+ 		dwc->maximum_speed = USB_SPEED_SUPER;
+ 
+ 		/*
+@@ -1023,6 +1035,8 @@ static int dwc3_probe(struct platform_device *pdev)
+ 		    (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
+ 		     DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
+ 			dwc->maximum_speed = USB_SPEED_SUPER_PLUS;
++
++		break;
+ 	}
+ 
+ 	/* Adjust Frame Length */
+diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
+index 482e6a1..3ac170f 100644
+--- a/drivers/usb/dwc3/gadget.c
++++ b/drivers/usb/dwc3/gadget.c
+@@ -1670,10 +1670,13 @@ static int dwc3_gadget_start(struct usb_gadget *g,
+ 		case USB_SPEED_SUPER_PLUS:
+ 			reg |= DWC3_DSTS_SUPERSPEED_PLUS;
+ 			break;
+-		case USB_SPEED_SUPER:	/* FALLTHROUGH */
+-		case USB_SPEED_UNKNOWN:	/* FALTHROUGH */
+ 		default:
+-			reg |= DWC3_DSTS_SUPERSPEED;
++			dev_err(dwc->dev, "invalid dwc->maximum_speed (%d)\n",
++				dwc->maximum_speed);
++			/* fall through */
++		case USB_SPEED_SUPER:
++			reg |= DWC3_DCFG_SUPERSPEED;
++			break;
+ 		}
+ 	}
+ 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-04-usb-dwc3-DWC_usb31-controller-check.patch b/target/linux/ipq806x/patches-4.4/096-04-usb-dwc3-DWC_usb31-controller-check.patch
new file mode 100644
index 0000000000..47278d40c5
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-04-usb-dwc3-DWC_usb31-controller-check.patch
@@ -0,0 +1,32 @@
+From c4137a9c841ec7fb300782d211f2d6907f4d6e20 Mon Sep 17 00:00:00 2001
+From: John Youn <John.Youn@synopsys.com>
+Date: Fri, 5 Feb 2016 17:08:18 -0800
+Subject: usb: dwc3: DWC_usb31 controller check
+
+Add a convenience function to check if the controller is DWC_usb31.
+
+Signed-off-by: John Youn <johnyoun@synopsys.com>
+Signed-off-by: Felipe Balbi <balbi@kernel.org>
+---
+ drivers/usb/dwc3/core.h | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
+index e4f8b90..c0520d67 100644
+--- a/drivers/usb/dwc3/core.h
++++ b/drivers/usb/dwc3/core.h
+@@ -1024,6 +1024,12 @@ struct dwc3_gadget_ep_cmd_params {
+ void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
+ int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc);
+ 
++/* check whether we are on the DWC_usb31 core */
++static inline bool dwc3_is_usb31(struct dwc3 *dwc)
++{
++	return !!(dwc->revision & DWC3_REVISION_IS_DWC31);
++}
++
+ #if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
+ int dwc3_host_init(struct dwc3 *dwc);
+ void dwc3_host_exit(struct dwc3 *dwc);
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-05-usb-dwc3-Update-register-fields-for-SuperSpeedPlus.patch b/target/linux/ipq806x/patches-4.4/096-05-usb-dwc3-Update-register-fields-for-SuperSpeedPlus.patch
new file mode 100644
index 0000000000..e4805db0b4
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-05-usb-dwc3-Update-register-fields-for-SuperSpeedPlus.patch
@@ -0,0 +1,46 @@
+From 1f38f88a24c86d46cf47782ffabd5457f231f8ca Mon Sep 17 00:00:00 2001
+From: John Youn <John.Youn@synopsys.com>
+Date: Fri, 5 Feb 2016 17:08:31 -0800
+Subject: usb: dwc3: Update register fields for SuperSpeedPlus
+
+Update various registers fields definitions for the DWC_usb31 controller
+for SuperSpeedPlus support.
+
+Signed-off-by: John Youn <johnyoun@synopsys.com>
+Signed-off-by: Felipe Balbi <balbi@kernel.org>
+---
+ drivers/usb/dwc3/core.h | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
+index c0520d67..6254b2f 100644
+--- a/drivers/usb/dwc3/core.h
++++ b/drivers/usb/dwc3/core.h
+@@ -223,7 +223,8 @@
+ /* Global HWPARAMS3 Register */
+ #define DWC3_GHWPARAMS3_SSPHY_IFC(n)		((n) & 3)
+ #define DWC3_GHWPARAMS3_SSPHY_IFC_DIS		0
+-#define DWC3_GHWPARAMS3_SSPHY_IFC_ENA		1
++#define DWC3_GHWPARAMS3_SSPHY_IFC_GEN1		1
++#define DWC3_GHWPARAMS3_SSPHY_IFC_GEN2		2 /* DWC_usb31 only */
+ #define DWC3_GHWPARAMS3_HSPHY_IFC(n)		(((n) & (3 << 2)) >> 2)
+ #define DWC3_GHWPARAMS3_HSPHY_IFC_DIS		0
+ #define DWC3_GHWPARAMS3_HSPHY_IFC_UTMI		1
+@@ -249,6 +250,7 @@
+ #define DWC3_DCFG_DEVADDR_MASK	DWC3_DCFG_DEVADDR(0x7f)
+ 
+ #define DWC3_DCFG_SPEED_MASK	(7 << 0)
++#define DWC3_DCFG_SUPERSPEED_PLUS (5 << 0)  /* DWC_usb31 only */
+ #define DWC3_DCFG_SUPERSPEED	(4 << 0)
+ #define DWC3_DCFG_HIGHSPEED	(0 << 0)
+ #define DWC3_DCFG_FULLSPEED2	(1 << 0)
+@@ -339,6 +341,7 @@
+ 
+ #define DWC3_DSTS_CONNECTSPD		(7 << 0)
+ 
++#define DWC3_DSTS_SUPERSPEED_PLUS	(5 << 0) /* DWC_usb31 only */
+ #define DWC3_DSTS_SUPERSPEED		(4 << 0)
+ #define DWC3_DSTS_HIGHSPEED		(0 << 0)
+ #define DWC3_DSTS_FULLSPEED2		(1 << 0)
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-06-usb-dwc3-core-improve-reset-sequence.patch b/target/linux/ipq806x/patches-4.4/096-06-usb-dwc3-core-improve-reset-sequence.patch
new file mode 100644
index 0000000000..197dd057d2
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-06-usb-dwc3-core-improve-reset-sequence.patch
@@ -0,0 +1,101 @@
+From f59dcab176293b646e1358144c93c58c3cda2813 Mon Sep 17 00:00:00 2001
+From: Felipe Balbi <felipe.balbi@linux.intel.com>
+Date: Fri, 11 Mar 2016 10:51:52 +0200
+Subject: usb: dwc3: core: improve reset sequence
+
+According to Synopsys Databook, we shouldn't be
+relying on GCTL.CORESOFTRESET bit as that's only for
+debugging purposes. Instead, let's use DCTL.CSFTRST
+if we're OTG or PERIPHERAL mode.
+
+Host side block will be reset by XHCI driver if
+necessary. Note that this reduces amount of time
+spent on dwc3_probe() by a long margin.
+
+We're still gonna wait for reset to finish for a
+long time (default to 1ms max), but tests show that
+the reset polling loop executed at most 19 times
+(modprobe dwc3 && modprobe -r dwc3 executed 1000
+times in a row).
+
+Suggested-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ drivers/usb/dwc3/core.c | 48 ++++++++++++++++++------------------------------
+ 1 file changed, 18 insertions(+), 30 deletions(-)
+
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index 17fd814..fa20f5a9 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -67,23 +67,9 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
+ static int dwc3_core_soft_reset(struct dwc3 *dwc)
+ {
+ 	u32		reg;
++	int		retries = 1000;
+ 	int		ret;
+ 
+-	/* Before Resetting PHY, put Core in Reset */
+-	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+-	reg |= DWC3_GCTL_CORESOFTRESET;
+-	dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+-
+-	/* Assert USB3 PHY reset */
+-	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
+-	reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
+-	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+-
+-	/* Assert USB2 PHY reset */
+-	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
+-	reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
+-	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+-
+ 	usb_phy_init(dwc->usb2_phy);
+ 	usb_phy_init(dwc->usb3_phy);
+ 	ret = phy_init(dwc->usb2_generic_phy);
+@@ -95,26 +81,28 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
+ 		phy_exit(dwc->usb2_generic_phy);
+ 		return ret;
+ 	}
+-	mdelay(100);
+ 
+-	/* Clear USB3 PHY reset */
+-	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
+-	reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
+-	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
++	/*
++	 * We're resetting only the device side because, if we're in host mode,
++	 * XHCI driver will reset the host block. If dwc3 was configured for
++	 * host-only mode, then we can return early.
++	 */
++	if (dwc->dr_mode == USB_DR_MODE_HOST)
++		return 0;
+ 
+-	/* Clear USB2 PHY reset */
+-	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
+-	reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
+-	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
++	reg = dwc3_readl(dwc->regs, DWC3_DCTL);
++	reg |= DWC3_DCTL_CSFTRST;
++	dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ 
+-	mdelay(100);
++	do {
++		reg = dwc3_readl(dwc->regs, DWC3_DCTL);
++		if (!(reg & DWC3_DCTL_CSFTRST))
++			return 0;
+ 
+-	/* After PHYs are stable we can take Core out of reset state */
+-	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+-	reg &= ~DWC3_GCTL_CORESOFTRESET;
+-	dwc3_writel(dwc->regs, DWC3_GCTL, reg);
++		udelay(1);
++	} while (--retries);
+ 
+-	return 0;
++	return -ETIMEDOUT;
+ }
+ 
+ /**
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch b/target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch
new file mode 100644
index 0000000000..9b6026d914
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch
@@ -0,0 +1,258 @@
+From bc5081617faeb3b2f0c126dc37264b87af7da47f Mon Sep 17 00:00:00 2001
+From: Felipe Balbi <felipe.balbi@linux.intel.com>
+Date: Thu, 4 Feb 2016 14:18:01 +0200
+Subject: usb: dwc3: drop FIFO resizing logic
+
+That FIFO resizing logic was added to support OMAP5
+ES1.0 which had a bogus default FIFO size. I can't
+remember the exact size of default FIFO, but it was
+less than one bulk superspeed packet (<1024) which
+would prevent USB3 from ever working on OMAP5 ES1.0.
+
+However, OMAP5 ES1.0 support has been dropped by
+commit aa2f4b16f830 ("ARM: OMAP5: id: Remove ES1.0
+support") which renders FIFO resizing unnecessary.
+
+Tested-by: Kishon Vijay Abraham I <kishon@ti.com>
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ Documentation/devicetree/bindings/usb/dwc3.txt     |  4 +-
+ .../devicetree/bindings/usb/qcom,dwc3.txt          |  1 -
+ drivers/usb/dwc3/core.c                            |  4 -
+ drivers/usb/dwc3/core.h                            |  5 --
+ drivers/usb/dwc3/ep0.c                             |  9 ---
+ drivers/usb/dwc3/gadget.c                          | 86 ----------------------
+ drivers/usb/dwc3/platform_data.h                   |  1 -
+ 7 files changed, 2 insertions(+), 108 deletions(-)
+
+diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
+index fb2ad0a..1569568 100644
+--- a/Documentation/devicetree/bindings/usb/dwc3.txt
++++ b/Documentation/devicetree/bindings/usb/dwc3.txt
+@@ -14,7 +14,6 @@ Optional properties:
+    the second element is expected to be a handle to the USB3/SS PHY
+  - phys: from the *Generic PHY* bindings
+  - phy-names: from the *Generic PHY* bindings
+- - tx-fifo-resize: determines if the FIFO *has* to be reallocated.
+  - snps,usb3_lpm_capable: determines if platform is USB3 LPM capable
+  - snps,disable_scramble_quirk: true when SW should disable data scrambling.
+ 	Only really useful for FPGA builds.
+@@ -47,6 +46,8 @@ Optional properties:
+ 	register for post-silicon frame length adjustment when the
+ 	fladj_30mhz_sdbnd signal is invalid or incorrect.
+ 
++ - <DEPRECATED> tx-fifo-resize: determines if the FIFO *has* to be reallocated.
++
+ This is usually a subnode to DWC3 glue to which it is connected.
+ 
+ dwc3@4a030000 {
+@@ -54,5 +55,4 @@ dwc3@4a030000 {
+ 	reg = <0x4a030000 0xcfff>;
+ 	interrupts = <0 92 4>
+ 	usb-phy = <&usb2_phy>, <&usb3,phy>;
+-	tx-fifo-resize;
+ };
+diff --git a/Documentation/devicetree/bindings/usb/qcom,dwc3.txt b/Documentation/devicetree/bindings/usb/qcom,dwc3.txt
+index ca164e7..39acb08 100644
+--- a/Documentation/devicetree/bindings/usb/qcom,dwc3.txt
++++ b/Documentation/devicetree/bindings/usb/qcom,dwc3.txt
+@@ -59,7 +59,6 @@ Example device nodes:
+ 				interrupts = <0 205 0x4>;
+ 				phys = <&hs_phy>, <&ss_phy>;
+ 				phy-names = "usb2-phy", "usb3-phy";
+-				tx-fifo-resize;
+ 				dr_mode = "host";
+ 			};
+ 		};
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index fa20f5a9..67d183a 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -882,9 +882,6 @@ static int dwc3_probe(struct platform_device *pdev)
+ 	dwc->usb3_lpm_capable = device_property_read_bool(dev,
+ 				"snps,usb3_lpm_capable");
+ 
+-	dwc->needs_fifo_resize = device_property_read_bool(dev,
+-				"tx-fifo-resize");
+-
+ 	dwc->disable_scramble_quirk = device_property_read_bool(dev,
+ 				"snps,disable_scramble_quirk");
+ 	dwc->u2exit_lfps_quirk = device_property_read_bool(dev,
+@@ -926,7 +923,6 @@ static int dwc3_probe(struct platform_device *pdev)
+ 		if (pdata->hird_threshold)
+ 			hird_threshold = pdata->hird_threshold;
+ 
+-		dwc->needs_fifo_resize = pdata->tx_fifo_resize;
+ 		dwc->usb3_lpm_capable = pdata->usb3_lpm_capable;
+ 		dwc->dr_mode = pdata->dr_mode;
+ 
+diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
+index 6254b2f..7cbe9e9 100644
+--- a/drivers/usb/dwc3/core.h
++++ b/drivers/usb/dwc3/core.h
+@@ -709,9 +709,7 @@ struct dwc3_scratchpad_array {
+  * 	0	- utmi_sleep_n
+  * 	1	- utmi_l1_suspend_n
+  * @is_fpga: true when we are using the FPGA board
+- * @needs_fifo_resize: not all users might want fifo resizing, flag it
+  * @pullups_connected: true when Run/Stop bit is set
+- * @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes.
+  * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
+  * @start_config_issued: true when StartConfig command has been issued
+  * @three_stage_setup: set if we perform a three phase setup
+@@ -855,9 +853,7 @@ struct dwc3 {
+ 	unsigned		has_lpm_erratum:1;
+ 	unsigned		is_utmi_l1_suspend:1;
+ 	unsigned		is_fpga:1;
+-	unsigned		needs_fifo_resize:1;
+ 	unsigned		pullups_connected:1;
+-	unsigned		resize_fifos:1;
+ 	unsigned		setup_packet_pending:1;
+ 	unsigned		three_stage_setup:1;
+ 	unsigned		usb3_lpm_capable:1;
+@@ -1025,7 +1021,6 @@ struct dwc3_gadget_ep_cmd_params {
+ 
+ /* prototypes */
+ void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
+-int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc);
+ 
+ /* check whether we are on the DWC_usb31 core */
+ static inline bool dwc3_is_usb31(struct dwc3 *dwc)
+diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
+index eca2e6d..4454de0 100644
+--- a/drivers/usb/dwc3/ep0.c
++++ b/drivers/usb/dwc3/ep0.c
+@@ -586,9 +586,6 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
+ 			reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+ 			reg |= (DWC3_DCTL_ACCEPTU1ENA | DWC3_DCTL_ACCEPTU2ENA);
+ 			dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+-
+-			dwc->resize_fifos = true;
+-			dwc3_trace(trace_dwc3_ep0, "resize FIFOs flag SET");
+ 		}
+ 		break;
+ 
+@@ -1027,12 +1024,6 @@ static int dwc3_ep0_start_control_status(struct dwc3_ep *dep)
+ 
+ static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep)
+ {
+-	if (dwc->resize_fifos) {
+-		dwc3_trace(trace_dwc3_ep0, "Resizing FIFOs");
+-		dwc3_gadget_resize_tx_fifos(dwc);
+-		dwc->resize_fifos = 0;
+-	}
+-
+ 	WARN_ON(dwc3_ep0_start_control_status(dep));
+ }
+ 
+diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
+index d54a028..3a5c271 100644
+--- a/drivers/usb/dwc3/gadget.c
++++ b/drivers/usb/dwc3/gadget.c
+@@ -145,92 +145,6 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)
+ 	return -ETIMEDOUT;
+ }
+ 
+-/**
+- * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case
+- * @dwc: pointer to our context structure
+- *
+- * This function will a best effort FIFO allocation in order
+- * to improve FIFO usage and throughput, while still allowing
+- * us to enable as many endpoints as possible.
+- *
+- * Keep in mind that this operation will be highly dependent
+- * on the configured size for RAM1 - which contains TxFifo -,
+- * the amount of endpoints enabled on coreConsultant tool, and
+- * the width of the Master Bus.
+- *
+- * In the ideal world, we would always be able to satisfy the
+- * following equation:
+- *
+- * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \
+- * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes
+- *
+- * Unfortunately, due to many variables that's not always the case.
+- */
+-int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc)
+-{
+-	int		last_fifo_depth = 0;
+-	int		ram1_depth;
+-	int		fifo_size;
+-	int		mdwidth;
+-	int		num;
+-
+-	if (!dwc->needs_fifo_resize)
+-		return 0;
+-
+-	ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);
+-	mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
+-
+-	/* MDWIDTH is represented in bits, we need it in bytes */
+-	mdwidth >>= 3;
+-
+-	/*
+-	 * FIXME For now we will only allocate 1 wMaxPacketSize space
+-	 * for each enabled endpoint, later patches will come to
+-	 * improve this algorithm so that we better use the internal
+-	 * FIFO space
+-	 */
+-	for (num = 0; num < dwc->num_in_eps; num++) {
+-		/* bit0 indicates direction; 1 means IN ep */
+-		struct dwc3_ep	*dep = dwc->eps[(num << 1) | 1];
+-		int		mult = 1;
+-		int		tmp;
+-
+-		if (!(dep->flags & DWC3_EP_ENABLED))
+-			continue;
+-
+-		if (usb_endpoint_xfer_bulk(dep->endpoint.desc)
+-				|| usb_endpoint_xfer_isoc(dep->endpoint.desc))
+-			mult = 3;
+-
+-		/*
+-		 * REVISIT: the following assumes we will always have enough
+-		 * space available on the FIFO RAM for all possible use cases.
+-		 * Make sure that's true somehow and change FIFO allocation
+-		 * accordingly.
+-		 *
+-		 * If we have Bulk or Isochronous endpoints, we want
+-		 * them to be able to be very, very fast. So we're giving
+-		 * those endpoints a fifo_size which is enough for 3 full
+-		 * packets
+-		 */
+-		tmp = mult * (dep->endpoint.maxpacket + mdwidth);
+-		tmp += mdwidth;
+-
+-		fifo_size = DIV_ROUND_UP(tmp, mdwidth);
+-
+-		fifo_size |= (last_fifo_depth << 16);
+-
+-		dwc3_trace(trace_dwc3_gadget, "%s: Fifo Addr %04x Size %d",
+-				dep->name, last_fifo_depth, fifo_size & 0xffff);
+-
+-		dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num), fifo_size);
+-
+-		last_fifo_depth += (fifo_size & 0xffff);
+-	}
+-
+-	return 0;
+-}
+-
+ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
+ 		int status)
+ {
+diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
+index 2bb4d3a..aaa6f00 100644
+--- a/drivers/usb/dwc3/platform_data.h
++++ b/drivers/usb/dwc3/platform_data.h
+@@ -23,7 +23,6 @@
+ struct dwc3_platform_data {
+ 	enum usb_device_speed maximum_speed;
+ 	enum usb_dr_mode dr_mode;
+-	bool tx_fifo_resize;
+ 	bool usb3_lpm_capable;
+ 
+ 	unsigned is_utmi_l1_suspend:1;
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-08-usb-dwc3-remove-num_event_buffers.patch b/target/linux/ipq806x/patches-4.4/096-08-usb-dwc3-remove-num_event_buffers.patch
new file mode 100644
index 0000000000..8bc0b9817f
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-08-usb-dwc3-remove-num_event_buffers.patch
@@ -0,0 +1,273 @@
+From 660e9bde74d6915227d7ee3485b11e5f52637b26 Mon Sep 17 00:00:00 2001
+From: Felipe Balbi <felipe.balbi@linux.intel.com>
+Date: Wed, 30 Mar 2016 09:26:24 +0300
+Subject: usb: dwc3: remove num_event_buffers
+
+We never, ever route any of the other event buffers
+so we might as well drop support for them.
+
+Until someone has a real, proper benefit for
+multiple event buffers, we will rely on a single
+one. This also helps reduce memory footprint of
+dwc3.ko which won't allocate memory for the extra
+event buffers.
+
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ drivers/usb/dwc3/core.c   | 81 +++++++++++++++++++----------------------------
+ drivers/usb/dwc3/core.h   |  2 --
+ drivers/usb/dwc3/gadget.c | 38 +++++++---------------
+ 3 files changed, 44 insertions(+), 77 deletions(-)
+
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index 67d183a..9e5c57c7 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -203,13 +203,10 @@ static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc,
+ static void dwc3_free_event_buffers(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer	*evt;
+-	int i;
+ 
+-	for (i = 0; i < dwc->num_event_buffers; i++) {
+-		evt = dwc->ev_buffs[i];
+-		if (evt)
+-			dwc3_free_one_event_buffer(dwc, evt);
+-	}
++	evt = dwc->ev_buffs[0];
++	if (evt)
++		dwc3_free_one_event_buffer(dwc, evt);
+ }
+ 
+ /**
+@@ -222,27 +219,19 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
+  */
+ static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
+ {
+-	int			num;
+-	int			i;
+-
+-	num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
+-	dwc->num_event_buffers = num;
++	struct dwc3_event_buffer *evt;
+ 
+-	dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num,
++	dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs),
+ 			GFP_KERNEL);
+ 	if (!dwc->ev_buffs)
+ 		return -ENOMEM;
+ 
+-	for (i = 0; i < num; i++) {
+-		struct dwc3_event_buffer	*evt;
+-
+-		evt = dwc3_alloc_one_event_buffer(dwc, length);
+-		if (IS_ERR(evt)) {
+-			dev_err(dwc->dev, "can't allocate event buffer\n");
+-			return PTR_ERR(evt);
+-		}
+-		dwc->ev_buffs[i] = evt;
++	evt = dwc3_alloc_one_event_buffer(dwc, length);
++	if (IS_ERR(evt)) {
++		dev_err(dwc->dev, "can't allocate event buffer\n");
++		return PTR_ERR(evt);
+ 	}
++	dwc->ev_buffs[0] = evt;
+ 
+ 	return 0;
+ }
+@@ -256,25 +245,22 @@ static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
+ static int dwc3_event_buffers_setup(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer	*evt;
+-	int				n;
+ 
+-	for (n = 0; n < dwc->num_event_buffers; n++) {
+-		evt = dwc->ev_buffs[n];
+-		dwc3_trace(trace_dwc3_core,
+-				"Event buf %p dma %08llx length %d\n",
+-				evt->buf, (unsigned long long) evt->dma,
+-				evt->length);
+-
+-		evt->lpos = 0;
+-
+-		dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n),
+-				lower_32_bits(evt->dma));
+-		dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n),
+-				upper_32_bits(evt->dma));
+-		dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n),
+-				DWC3_GEVNTSIZ_SIZE(evt->length));
+-		dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0);
+-	}
++	evt = dwc->ev_buffs[0];
++	dwc3_trace(trace_dwc3_core,
++			"Event buf %p dma %08llx length %d\n",
++			evt->buf, (unsigned long long) evt->dma,
++			evt->length);
++
++	evt->lpos = 0;
++
++	dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0),
++			lower_32_bits(evt->dma));
++	dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0),
++			upper_32_bits(evt->dma));
++	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),
++			DWC3_GEVNTSIZ_SIZE(evt->length));
++	dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
+ 
+ 	return 0;
+ }
+@@ -282,19 +268,16 @@ static int dwc3_event_buffers_setup(struct dwc3 *dwc)
+ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer	*evt;
+-	int				n;
+ 
+-	for (n = 0; n < dwc->num_event_buffers; n++) {
+-		evt = dwc->ev_buffs[n];
++	evt = dwc->ev_buffs[0];
+ 
+-		evt->lpos = 0;
++	evt->lpos = 0;
+ 
+-		dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0);
+-		dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0);
+-		dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), DWC3_GEVNTSIZ_INTMASK
+-				| DWC3_GEVNTSIZ_SIZE(0));
+-		dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0);
+-	}
++	dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 0);
++	dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 0);
++	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_INTMASK
++			| DWC3_GEVNTSIZ_SIZE(0));
++	dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
+ }
+ 
+ static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc)
+diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
+index 4ea4b51..be03999 100644
+--- a/drivers/usb/dwc3/core.h
++++ b/drivers/usb/dwc3/core.h
+@@ -667,7 +667,6 @@ struct dwc3_scratchpad_array {
+  * @regs: base address for our registers
+  * @regs_size: address space size
+  * @nr_scratch: number of scratch buffers
+- * @num_event_buffers: calculated number of event buffers
+  * @u1u2: only used on revisions <1.83a for workaround
+  * @maximum_speed: maximum speed requested (mainly for testing purposes)
+  * @revision: revision register contents
+@@ -778,7 +777,6 @@ struct dwc3 {
+ 	u32			gctl;
+ 
+ 	u32			nr_scratch;
+-	u32			num_event_buffers;
+ 	u32			u1u2;
+ 	u32			maximum_speed;
+ 
+diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
+index e6bd3a9..5e6a495 100644
+--- a/drivers/usb/dwc3/gadget.c
++++ b/drivers/usb/dwc3/gadget.c
+@@ -2602,14 +2602,14 @@ static void dwc3_process_event_entry(struct dwc3 *dwc,
+ 	}
+ }
+ 
+-static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf)
++static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer *evt;
+ 	irqreturn_t ret = IRQ_NONE;
+ 	int left;
+ 	u32 reg;
+ 
+-	evt = dwc->ev_buffs[buf];
++	evt = dwc->ev_buffs[0];
+ 	left = evt->count;
+ 
+ 	if (!(evt->flags & DWC3_EVENT_PENDING))
+@@ -2634,7 +2634,7 @@ static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf)
+ 		evt->lpos = (evt->lpos + 4) % DWC3_EVENT_BUFFERS_SIZE;
+ 		left -= 4;
+ 
+-		dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(buf), 4);
++		dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 4);
+ 	}
+ 
+ 	evt->count = 0;
+@@ -2642,9 +2642,9 @@ static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc, u32 buf)
+ 	ret = IRQ_HANDLED;
+ 
+ 	/* Unmask interrupt */
+-	reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf));
++	reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(0));
+ 	reg &= ~DWC3_GEVNTSIZ_INTMASK;
+-	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg);
++	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), reg);
+ 
+ 	return ret;
+ }
+@@ -2654,27 +2654,23 @@ static irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc)
+ 	struct dwc3 *dwc = _dwc;
+ 	unsigned long flags;
+ 	irqreturn_t ret = IRQ_NONE;
+-	int i;
+ 
+ 	spin_lock_irqsave(&dwc->lock, flags);
+-
+-	for (i = 0; i < dwc->num_event_buffers; i++)
+-		ret |= dwc3_process_event_buf(dwc, i);
+-
++	ret = dwc3_process_event_buf(dwc);
+ 	spin_unlock_irqrestore(&dwc->lock, flags);
+ 
+ 	return ret;
+ }
+ 
+-static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf)
++static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer *evt;
+ 	u32 count;
+ 	u32 reg;
+ 
+-	evt = dwc->ev_buffs[buf];
++	evt = dwc->ev_buffs[0];
+ 
+-	count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(buf));
++	count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));
+ 	count &= DWC3_GEVNTCOUNT_MASK;
+ 	if (!count)
+ 		return IRQ_NONE;
+@@ -2683,9 +2679,9 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf)
+ 	evt->flags |= DWC3_EVENT_PENDING;
+ 
+ 	/* Mask interrupt */
+-	reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(buf));
++	reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(0));
+ 	reg |= DWC3_GEVNTSIZ_INTMASK;
+-	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(buf), reg);
++	dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), reg);
+ 
+ 	return IRQ_WAKE_THREAD;
+ }
+@@ -2693,18 +2689,8 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc, u32 buf)
+ static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
+ {
+ 	struct dwc3			*dwc = _dwc;
+-	int				i;
+-	irqreturn_t			ret = IRQ_NONE;
+-
+-	for (i = 0; i < dwc->num_event_buffers; i++) {
+-		irqreturn_t status;
+ 
+-		status = dwc3_check_event_buf(dwc, i);
+-		if (status == IRQ_WAKE_THREAD)
+-			ret = status;
+-	}
+-
+-	return ret;
++	return dwc3_check_event_buf(dwc);
+ }
+ 
+ /**
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-09-usb-dwc3-drop-ev_buffs-array.patch b/target/linux/ipq806x/patches-4.4/096-09-usb-dwc3-drop-ev_buffs-array.patch
new file mode 100644
index 0000000000..64d796cf38
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-09-usb-dwc3-drop-ev_buffs-array.patch
@@ -0,0 +1,104 @@
+From 696c8b1282205caa5206264449f80ef756f14ef7 Mon Sep 17 00:00:00 2001
+From: Felipe Balbi <felipe.balbi@linux.intel.com>
+Date: Wed, 30 Mar 2016 09:37:03 +0300
+Subject: usb: dwc3: drop ev_buffs array
+
+we will be using a single event buffer and that
+renders ev_buffs array unnecessary. Let's remove it
+in favor of a single pointer to a single event
+buffer.
+
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ drivers/usb/dwc3/core.c   | 13 ++++---------
+ drivers/usb/dwc3/core.h   |  2 +-
+ drivers/usb/dwc3/gadget.c |  4 ++--
+ 3 files changed, 7 insertions(+), 12 deletions(-)
+
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index 9e5c57c7..05b7ec3 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -204,7 +204,7 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer	*evt;
+ 
+-	evt = dwc->ev_buffs[0];
++	evt = dwc->ev_buf;
+ 	if (evt)
+ 		dwc3_free_one_event_buffer(dwc, evt);
+ }
+@@ -221,17 +221,12 @@ static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
+ {
+ 	struct dwc3_event_buffer *evt;
+ 
+-	dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs),
+-			GFP_KERNEL);
+-	if (!dwc->ev_buffs)
+-		return -ENOMEM;
+-
+ 	evt = dwc3_alloc_one_event_buffer(dwc, length);
+ 	if (IS_ERR(evt)) {
+ 		dev_err(dwc->dev, "can't allocate event buffer\n");
+ 		return PTR_ERR(evt);
+ 	}
+-	dwc->ev_buffs[0] = evt;
++	dwc->ev_buf = evt;
+ 
+ 	return 0;
+ }
+@@ -246,7 +241,7 @@ static int dwc3_event_buffers_setup(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer	*evt;
+ 
+-	evt = dwc->ev_buffs[0];
++	evt = dwc->ev_buf;
+ 	dwc3_trace(trace_dwc3_core,
+ 			"Event buf %p dma %08llx length %d\n",
+ 			evt->buf, (unsigned long long) evt->dma,
+@@ -269,7 +264,7 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
+ {
+ 	struct dwc3_event_buffer	*evt;
+ 
+-	evt = dwc->ev_buffs[0];
++	evt = dwc->ev_buf;
+ 
+ 	evt->lpos = 0;
+ 
+diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
+index be03999..df72234a 100644
+--- a/drivers/usb/dwc3/core.h
++++ b/drivers/usb/dwc3/core.h
+@@ -753,7 +753,7 @@ struct dwc3 {
+ 	struct platform_device	*xhci;
+ 	struct resource		xhci_resources[DWC3_XHCI_RESOURCES_NUM];
+ 
+-	struct dwc3_event_buffer **ev_buffs;
++	struct dwc3_event_buffer *ev_buf;
+ 	struct dwc3_ep		*eps[DWC3_ENDPOINTS_NUM];
+ 
+ 	struct usb_gadget	gadget;
+diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
+index 5e6a495..96dfde0 100644
+--- a/drivers/usb/dwc3/gadget.c
++++ b/drivers/usb/dwc3/gadget.c
+@@ -2609,7 +2609,7 @@ static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc)
+ 	int left;
+ 	u32 reg;
+ 
+-	evt = dwc->ev_buffs[0];
++	evt = dwc->ev_buf;
+ 	left = evt->count;
+ 
+ 	if (!(evt->flags & DWC3_EVENT_PENDING))
+@@ -2668,7 +2668,7 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc)
+ 	u32 count;
+ 	u32 reg;
+ 
+-	evt = dwc->ev_buffs[0];
++	evt = dwc->ev_buf;
+ 
+ 	count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));
+ 	count &= DWC3_GEVNTCOUNT_MASK;
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/096-10-usb-dwc3-core-fix-PHY-handling-during-suspend.patch b/target/linux/ipq806x/patches-4.4/096-10-usb-dwc3-core-fix-PHY-handling-during-suspend.patch
new file mode 100644
index 0000000000..87f1562cc6
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/096-10-usb-dwc3-core-fix-PHY-handling-during-suspend.patch
@@ -0,0 +1,71 @@
+From 5c4ad318de3b8e8680d654c82a254c4b65243739 Mon Sep 17 00:00:00 2001
+From: Felipe Balbi <balbi@kernel.org>
+Date: Mon, 11 Apr 2016 17:12:34 +0300
+Subject: usb: dwc3: core: fix PHY handling during suspend
+
+we need to power off the PHY during suspend and
+power it back on during resume.
+
+Signed-off-by: Felipe Balbi <balbi@kernel.org>
+[nsekhar@ti.com: fix call to usb_phy_set_suspend() in dwc3_suspend()]
+Signed-off-by: Sekhar Nori <nsekhar@ti.com>
+Signed-off-by: Roger Quadros <rogerq@ti.com>
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ drivers/usb/dwc3/core.c | 23 ++++++++++++++++++++++-
+ 1 file changed, 22 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
+index fa20f5a9..34277ce 100644
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -1150,6 +1150,11 @@ static int dwc3_suspend(struct device *dev)
+ 	phy_exit(dwc->usb2_generic_phy);
+ 	phy_exit(dwc->usb3_generic_phy);
+ 
++	usb_phy_set_suspend(dwc->usb2_phy, 1);
++	usb_phy_set_suspend(dwc->usb3_phy, 1);
++	WARN_ON(phy_power_off(dwc->usb2_generic_phy) < 0);
++	WARN_ON(phy_power_off(dwc->usb3_generic_phy) < 0);
++
+ 	pinctrl_pm_select_sleep_state(dev);
+ 
+ 	return 0;
+@@ -1163,11 +1168,21 @@ static int dwc3_resume(struct device *dev)
+ 
+ 	pinctrl_pm_select_default_state(dev);
+ 
++	usb_phy_set_suspend(dwc->usb2_phy, 0);
++	usb_phy_set_suspend(dwc->usb3_phy, 0);
++	ret = phy_power_on(dwc->usb2_generic_phy);
++	if (ret < 0)
++		return ret;
++
++	ret = phy_power_on(dwc->usb3_generic_phy);
++	if (ret < 0)
++		goto err_usb2phy_power;
++
+ 	usb_phy_init(dwc->usb3_phy);
+ 	usb_phy_init(dwc->usb2_phy);
+ 	ret = phy_init(dwc->usb2_generic_phy);
+ 	if (ret < 0)
+-		return ret;
++		goto err_usb3phy_power;
+ 
+ 	ret = phy_init(dwc->usb3_generic_phy);
+ 	if (ret < 0)
+@@ -1200,6 +1215,12 @@ static int dwc3_resume(struct device *dev)
+ err_usb2phy_init:
+ 	phy_exit(dwc->usb2_generic_phy);
+ 
++err_usb3phy_power:
++	phy_power_off(dwc->usb3_generic_phy);
++
++err_usb2phy_power:
++	phy_power_off(dwc->usb2_generic_phy);
++
+ 	return ret;
+ }
+ 
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/097-usb-dwc3-add-generic-OF-glue-layer.patch b/target/linux/ipq806x/patches-4.4/097-1-usb-dwc3-add-generic-OF-glue-layer.patch
index 214bedc95a..214bedc95a 100644
--- a/target/linux/ipq806x/patches-4.4/097-usb-dwc3-add-generic-OF-glue-layer.patch
+++ b/target/linux/ipq806x/patches-4.4/097-1-usb-dwc3-add-generic-OF-glue-layer.patch
diff --git a/target/linux/ipq806x/patches-4.4/098-usb-dwc3-of-simple-fix-build-warning-on-PM.patch b/target/linux/ipq806x/patches-4.4/097-2-usb-dwc3-of-simple-fix-build-warning-on-PM.patch
index b982c82367..b982c82367 100644
--- a/target/linux/ipq806x/patches-4.4/098-usb-dwc3-of-simple-fix-build-warning-on-PM.patch
+++ b/target/linux/ipq806x/patches-4.4/097-2-usb-dwc3-of-simple-fix-build-warning-on-PM.patch
diff --git a/target/linux/ipq806x/patches-4.4/099-usb-dwc3-Remove-impossible-check-for-of_clk_get_pare.patch b/target/linux/ipq806x/patches-4.4/097-3-usb-dwc3-Remove-impossible-check-for-of_clk_get_pare.patch
index 32f9e34177..32f9e34177 100644
--- a/target/linux/ipq806x/patches-4.4/099-usb-dwc3-Remove-impossible-check-for-of_clk_get_pare.patch
+++ b/target/linux/ipq806x/patches-4.4/097-3-usb-dwc3-Remove-impossible-check-for-of_clk_get_pare.patch
diff --git a/target/linux/ipq806x/patches-4.4/097-4-usb-dwc3-fix-missing-platform_set_drvdata-in-dwc3_of_simple_probe.patch b/target/linux/ipq806x/patches-4.4/097-4-usb-dwc3-fix-missing-platform_set_drvdata-in-dwc3_of_simple_probe.patch
new file mode 100644
index 0000000000..2aeadc30ed
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/097-4-usb-dwc3-fix-missing-platform_set_drvdata-in-dwc3_of_simple_probe.patch
@@ -0,0 +1,31 @@
+From 4c4f106c032ff32b89c98a4d819e68e6e643c14e Mon Sep 17 00:00:00 2001
+From: Wei Yongjun <weiyj.lk@gmail.com>
+Date: Tue, 26 Jul 2016 14:47:00 +0000
+Subject: usb: dwc3: fix missing platform_set_drvdata() in
+ dwc3_of_simple_probe()
+
+Add missing platform_set_drvdata() in dwc3_of_simple_probe(), otherwise
+calling platform_get_drvdata() in remove returns NULL.
+
+This is detected by Coccinelle semantic patch.
+
+Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com>
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ drivers/usb/dwc3/dwc3-of-simple.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
+index 9743353..e56d59b 100644
+--- a/drivers/usb/dwc3/dwc3-of-simple.c
++++ b/drivers/usb/dwc3/dwc3-of-simple.c
+@@ -61,6 +61,7 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
+ 	if (!simple->clks)
+ 		return -ENOMEM;
+ 
++	platform_set_drvdata(pdev, simple);
+ 	simple->dev = dev;
+ 
+ 	for (i = 0; i < simple->num_clocks; i++) {
+-- 
+cgit v0.12
diff --git a/target/linux/ipq806x/patches-4.4/101-ARM-qcom-add-USB-nodes-to-ipq806x-ap148.patch b/target/linux/ipq806x/patches-4.4/101-ARM-qcom-add-USB-nodes-to-ipq806x-ap148.patch
index 6e6f10d549..d1f19c367e 100644
--- a/target/linux/ipq806x/patches-4.4/101-ARM-qcom-add-USB-nodes-to-ipq806x-ap148.patch
+++ b/target/linux/ipq806x/patches-4.4/101-ARM-qcom-add-USB-nodes-to-ipq806x-ap148.patch
@@ -32,7 +32,7 @@
  };
 --- a/arch/arm/boot/dts/qcom-ipq8064.dtsi
 +++ b/arch/arm/boot/dts/qcom-ipq8064.dtsi
-@@ -333,6 +333,90 @@
+@@ -333,6 +333,88 @@
  			compatible = "syscon";
  			reg = <0x01200600 0x100>;
  		};
@@ -94,7 +94,6 @@
 +				interrupts = <0 110 0x4>;
 +				phys = <&hs_phy_0>, <&ss_phy_0>;
 +				phy-names = "usb2-phy", "usb3-phy";
-+				tx-fifo-resize;
 +				dr_mode = "host";
 +			};
 +		};
@@ -116,7 +115,6 @@
 +				interrupts = <0 205 0x4>;
 +				phys = <&hs_phy_1>, <&ss_phy_1>;
 +				phy-names = "usb2-phy", "usb3-phy";
-+				tx-fifo-resize;
 +				dr_mode = "host";
 +			};
 +		};