brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 152 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0313-usb-dwc2-Fix-disable-all-EP-s-on-disconnect.patch b/target/linux/brcm2708/patches-4.19/950-0313-usb-dwc2-Fix-disable-all-EP-s-on-disconnect.patch
new file mode 100644
index 0000000000..a0b0cad315
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0313-usb-dwc2-Fix-disable-all-EP-s-on-disconnect.patch
@@ -0,0 +1,152 @@
+From c28c22b965a3c129fd4ba70a5e6b1b2353282d46 Mon Sep 17 00:00:00 2001
+From: Minas Harutyunyan <minas.harutyunyan@synopsys.com>
+Date: Mon, 10 Dec 2018 18:09:32 +0400
+Subject: [PATCH 313/703] usb: dwc2: Fix disable all EP's on disconnect
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+commit 4fe4f9fecc36956fd53c8edf96dd0c691ef98ff9 upstream.
+
+Disabling all EP's allow to reset EP's to initial state.
+Introduced new function dwc2_hsotg_ep_disable_lock() which
+before calling dwc2_hsotg_ep_disable() function acquire
+hsotg->lock and release on exiting.
+From dwc2_hsotg_ep_disable() function removed acquiring
+hsotg->lock.
+In dwc2_hsotg_core_init_disconnected() function when USB
+reset interrupt asserted disabling all ep’s by
+dwc2_hsotg_ep_disable() function.
+This updates eliminating sparse imbalance warnings.
+
+Reverted changes in dwc2_hostg_disconnect() function.
+Introduced new function dwc2_hsotg_ep_disable_lock().
+Changed dwc2_hsotg_ep_ops. Now disable point to
+dwc2_hsotg_ep_disable_lock() function.
+In functions dwc2_hsotg_udc_stop() and dwc2_hsotg_suspend()
+dwc2_hsotg_ep_disable() function replaced by
+dwc2_hsotg_ep_disable_lock() function.
+In dwc2_hsotg_ep_disable() function removed acquiring
+of hsotg->lock.
+
+Fixes: dccf1bad4be7 ("usb: dwc2: Disable all EP's on disconnect")
+Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ drivers/usb/dwc2/gadget.c | 41 ++++++++++++++++++++++-----------------
+ 1 file changed, 23 insertions(+), 18 deletions(-)
+
+--- a/drivers/usb/dwc2/gadget.c
++++ b/drivers/usb/dwc2/gadget.c
+@@ -3107,8 +3107,6 @@ static void kill_all_requests(struct dwc
+ 		dwc2_hsotg_txfifo_flush(hsotg, ep->fifo_index);
+ }
+ 
+-static int dwc2_hsotg_ep_disable(struct usb_ep *ep);
+-
+ /**
+  * dwc2_hsotg_disconnect - disconnect service
+  * @hsotg: The device state.
+@@ -3130,9 +3128,11 @@ void dwc2_hsotg_disconnect(struct dwc2_h
+ 	/* all endpoints should be shutdown */
+ 	for (ep = 0; ep < hsotg->num_of_eps; ep++) {
+ 		if (hsotg->eps_in[ep])
+-			dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
++			kill_all_requests(hsotg, hsotg->eps_in[ep],
++					  -ESHUTDOWN);
+ 		if (hsotg->eps_out[ep])
+-			dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
++			kill_all_requests(hsotg, hsotg->eps_out[ep],
++					  -ESHUTDOWN);
+ 	}
+ 
+ 	call_gadget(hsotg, disconnect);
+@@ -3176,6 +3176,7 @@ static void dwc2_hsotg_irq_fifoempty(str
+ 			GINTSTS_PTXFEMP |  \
+ 			GINTSTS_RXFLVL)
+ 
++static int dwc2_hsotg_ep_disable(struct usb_ep *ep);
+ /**
+  * dwc2_hsotg_core_init - issue softreset to the core
+  * @hsotg: The device state
+@@ -4004,10 +4005,8 @@ static int dwc2_hsotg_ep_disable(struct
+ 	struct dwc2_hsotg *hsotg = hs_ep->parent;
+ 	int dir_in = hs_ep->dir_in;
+ 	int index = hs_ep->index;
+-	unsigned long flags;
+ 	u32 epctrl_reg;
+ 	u32 ctrl;
+-	int locked;
+ 
+ 	dev_dbg(hsotg->dev, "%s(ep %p)\n", __func__, ep);
+ 
+@@ -4023,10 +4022,6 @@ static int dwc2_hsotg_ep_disable(struct
+ 
+ 	epctrl_reg = dir_in ? DIEPCTL(index) : DOEPCTL(index);
+ 
+-	locked = spin_is_locked(&hsotg->lock);
+-	if (!locked)
+-		spin_lock_irqsave(&hsotg->lock, flags);
+-
+ 	ctrl = dwc2_readl(hsotg, epctrl_reg);
+ 
+ 	if (ctrl & DXEPCTL_EPENA)
+@@ -4049,12 +4044,22 @@ static int dwc2_hsotg_ep_disable(struct
+ 	hs_ep->fifo_index = 0;
+ 	hs_ep->fifo_size = 0;
+ 
+-	if (!locked)
+-		spin_unlock_irqrestore(&hsotg->lock, flags);
+-
+ 	return 0;
+ }
+ 
++static int dwc2_hsotg_ep_disable_lock(struct usb_ep *ep)
++{
++	struct dwc2_hsotg_ep *hs_ep = our_ep(ep);
++	struct dwc2_hsotg *hsotg = hs_ep->parent;
++	unsigned long flags;
++	int ret;
++
++	spin_lock_irqsave(&hsotg->lock, flags);
++	ret = dwc2_hsotg_ep_disable(ep);
++	spin_unlock_irqrestore(&hsotg->lock, flags);
++	return ret;
++}
++
+ /**
+  * on_list - check request is on the given endpoint
+  * @ep: The endpoint to check.
+@@ -4202,7 +4207,7 @@ static int dwc2_hsotg_ep_sethalt_lock(st
+ 
+ static const struct usb_ep_ops dwc2_hsotg_ep_ops = {
+ 	.enable		= dwc2_hsotg_ep_enable,
+-	.disable	= dwc2_hsotg_ep_disable,
++	.disable	= dwc2_hsotg_ep_disable_lock,
+ 	.alloc_request	= dwc2_hsotg_ep_alloc_request,
+ 	.free_request	= dwc2_hsotg_ep_free_request,
+ 	.queue		= dwc2_hsotg_ep_queue_lock,
+@@ -4342,9 +4347,9 @@ static int dwc2_hsotg_udc_stop(struct us
+ 	/* all endpoints should be shutdown */
+ 	for (ep = 1; ep < hsotg->num_of_eps; ep++) {
+ 		if (hsotg->eps_in[ep])
+-			dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
++			dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep);
+ 		if (hsotg->eps_out[ep])
+-			dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
++			dwc2_hsotg_ep_disable_lock(&hsotg->eps_out[ep]->ep);
+ 	}
+ 
+ 	spin_lock_irqsave(&hsotg->lock, flags);
+@@ -4792,9 +4797,9 @@ int dwc2_hsotg_suspend(struct dwc2_hsotg
+ 
+ 		for (ep = 0; ep < hsotg->num_of_eps; ep++) {
+ 			if (hsotg->eps_in[ep])
+-				dwc2_hsotg_ep_disable(&hsotg->eps_in[ep]->ep);
++				dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep);
+ 			if (hsotg->eps_out[ep])
+-				dwc2_hsotg_ep_disable(&hsotg->eps_out[ep]->ep);
++				dwc2_hsotg_ep_disable_lock(&hsotg->eps_out[ep]->ep);
+ 		}
+ 	}
+