--- zzzz-none-000/linux-4.4.271/drivers/usb/host/ehci-hcd.c	2021-06-03 06:22:09.000000000 +0000
+++ dakota-7530ac-750/linux-4.4.271/drivers/usb/host/ehci-hcd.c	2023-01-11 09:25:42.000000000 +0000
@@ -103,6 +103,12 @@
 module_param (ignore_oc, bool, S_IRUGO);
 MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications");
 
+#if defined(CONFIG_SOC_QCA955X) || defined(CONFIG_SOC_QCA956X)
+static unsigned int fatal_counter = 0;
+module_param (fatal_counter, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC (fatal_counter, "number of fatal errors");
+#endif
+
 #define	INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT)
 
 /*-------------------------------------------------------------------------*/
@@ -253,6 +259,37 @@
 	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,
@@ -652,7 +689,7 @@
 		"USB %x.%x started, EHCI %x.%02x%s\n",
 		((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f),
 		temp >> 8, temp & 0xff,
-		ignore_oc ? ", overcurrent ignored" : "");
+		(ignore_oc || ehci->ignore_oc) ? ", overcurrent ignored" : "");
 
 	ehci_writel(ehci, INTR_MASK,
 		    &ehci->regs->intr_enable); /* Turn On Interrupts */
@@ -739,6 +776,21 @@
 	cmd = ehci_readl(ehci, &ehci->regs->command);
 	bh = 0;
 
+#if defined(CONFIG_SOC_QCA955X) || defined(CONFIG_SOC_QCA956X)
+#define STS_RX_OVERFLOW STS_FATAL
+	/* AVM/BC 25.03.2014: Atheros BSP */
+	if (unlikely ((status & STS_RX_OVERFLOW) != 0)) {
+		fatal_counter++;
+		//ehci_dbg(ehci, "Rx Overflow encountered\n");
+		printk(KERN_INFO "%s Rx Overflow encountered\n", __FUNCTION__);
+		ehci_writel(ehci, cmd | CMD_RUN, &ehci->regs->command);
+		status &= ~STS_RX_OVERFLOW;
+		udelay(5);
+	}
+	#undef STS_RX_OVERFLOW
+
+#endif /* CONFIG_MACH_AR934x */
+
 	/* normal [4.15.1.2] or error [4.15.1.1] completion */
 	if (likely ((status & (STS_INT|STS_ERR)) != 0)) {
 		if (likely ((status & STS_ERR) == 0))