libreCMC/target/linux/ar71xx/patches-4.4/490-usb-ehci-add-quirks-for-qca-socs.patch

--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -252,6 +252,37 @@ int ehci_reset(struct ehci_hcd *ehci)
 	command |= CMD_RESET;
 	dbg_cmd (ehci, "reset", command);
 	ehci_writel(ehci, command, &ehci->regs->command);
+
+	if (ehci->qca_force_host_mode) {
+		u32 usbmode;
+
+		udelay(1000);
+
+		usbmode = ehci_readl(ehci, &ehci->regs->usbmode);
+		usbmode |= USBMODE_CM_HC | (1 << 4);
+		ehci_writel(ehci, usbmode, &ehci->regs->usbmode);
+
+		ehci_dbg(ehci, "forced host mode, usbmode: %08x\n",
+			 ehci_readl(ehci, &ehci->regs->usbmode));
+	}
+
+	if (ehci->qca_force_16bit_ptw) {
+		u32 port_status;
+
+		udelay(1000);
+
+		/* enable 16-bit UTMI interface */
+		port_status = ehci_readl(ehci, &ehci->regs->port_status[0]);
+		port_status |= BIT(28);
+		ehci_writel(ehci, port_status, &ehci->regs->port_status[0]);
+
+		ehci_dbg(ehci, "16-bit UTMI interface enabled, status: %08x\n",
+			 ehci_readl(ehci, &ehci->regs->port_status[0]));
+	}
+
+	if (ehci->reset_notifier)
+		ehci->reset_notifier(ehci_to_hcd(ehci));
+
 	ehci->rh_state = EHCI_RH_HALTED;
 	ehci->next_statechange = jiffies;
 	retval = ehci_handshake(ehci, &ehci->regs->command,
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -228,6 +228,10 @@ struct ehci_hcd {			/* one per controlle
 	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
 	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
 	unsigned		ignore_oc:1;
+	unsigned		qca_force_host_mode:1;
+	unsigned		qca_force_16bit_ptw:1; /* force 16 bit UTMI */
+
+	void (*reset_notifier)(struct usb_hcd *hcd);
 
 	/* required for usb32 quirk */
 	#define OHCI_CTRL_HCFS          (3 << 6)
--- a/include/linux/usb/ehci_pdriver.h
+++ b/include/linux/usb/ehci_pdriver.h
@@ -50,6 +50,8 @@ struct usb_ehci_pdata {
 	unsigned	reset_on_resume:1;
 	unsigned	dma_mask_64:1;
 	unsigned	ignore_oc:1;
+	unsigned	qca_force_host_mode:1;
+	unsigned	qca_force_16bit_ptw:1;
 
 	/* Turn on all power and clocks */
 	int (*power_on)(struct platform_device *pdev);
@@ -59,6 +61,7 @@ struct usb_ehci_pdata {
 	 * turn off everything else */
 	void (*power_suspend)(struct platform_device *pdev);
 	int (*pre_setup)(struct usb_hcd *hcd);
+	void (*reset_notifier)(struct platform_device *pdev);
 };
 
 #endif /* __USB_CORE_EHCI_PDRIVER_H */
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -51,6 +51,14 @@ struct ehci_platform_priv {
 
 static const char hcd_name[] = "ehci-platform";
 
+static void ehci_platform_reset_notifier(struct usb_hcd *hcd)
+{
+	struct platform_device *pdev = to_platform_device(hcd->self.controller);
+	struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
+
+	pdata->reset_notifier(pdev);
+}
+
 static int ehci_platform_reset(struct usb_hcd *hcd)
 {
 	struct platform_device *pdev = to_platform_device(hcd->self.controller);
@@ -256,6 +264,13 @@ static int ehci_platform_probe(struct pl
 		priv->reset_on_resume = true;
 	if (pdata->ignore_oc)
 		ehci->ignore_oc = 1;
+	if (pdata->qca_force_host_mode)
+		ehci->qca_force_host_mode = 1;
+	if (pdata->qca_force_16bit_ptw)
+		ehci->qca_force_16bit_ptw = 1;
+
+	if (pdata->reset_notifier)
+		ehci->reset_notifier = ehci_platform_reset_notifier;
 
 #ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
 	if (ehci->big_endian_mmio) {