From: Florian Fainelli <florian@openwrt.org>
Subject: USB: EHCI: add ignore_oc flag to disable overcurrent checking

This patch adds an ignore_oc flag which can be set by EHCI controller
not supporting or wanting to disable overcurrent checking. The EHCI
platform data in include/linux/usb/ehci_pdriver.h is also augmented to
take advantage of this new flag.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
---
 drivers/usb/host/ehci-hcd.c      |    2 +-
 drivers/usb/host/ehci-hub.c      |    4 ++--
 drivers/usb/host/ehci-platform.c |    1 +
 drivers/usb/host/ehci.h          |    1 +
 include/linux/usb/ehci_pdriver.h |    1 +
 5 files changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -652,7 +652,7 @@ static int ehci_run (struct usb_hcd *hcd
 		"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 */
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -637,7 +637,7 @@ ehci_hub_status_data (struct usb_hcd *hc
 	 * always set, seem to clear PORT_OCC and PORT_CSC when writing to
 	 * PORT_POWER; that's surprising, but maybe within-spec.
 	 */
-	if (!ignore_oc)
+	if (!ignore_oc && !ehci->ignore_oc)
 		mask = PORT_CSC | PORT_PEC | PORT_OCC;
 	else
 		mask = PORT_CSC | PORT_PEC;
@@ -1007,7 +1007,7 @@ int ehci_hub_control(
 		if (temp & PORT_PEC)
 			status |= USB_PORT_STAT_C_ENABLE << 16;
 
-		if ((temp & PORT_OCC) && !ignore_oc){
+		if ((temp & PORT_OCC) && (!ignore_oc && !ehci->ignore_oc)){
 			status |= USB_PORT_STAT_C_OVERCURRENT << 16;
 
 			/*
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -259,6 +259,8 @@ static int ehci_platform_probe(struct pl
 		hcd->has_tt = 1;
 	if (pdata->reset_on_resume)
 		priv->reset_on_resume = true;
+	if (pdata->ignore_oc)
+		ehci->ignore_oc = 1;
 
 #ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
 	if (ehci->big_endian_mmio) {
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -230,6 +230,7 @@ struct ehci_hcd {			/* one per controlle
 	unsigned		frame_index_bug:1; /* MosChip (AKA NetMos) */
 	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
 	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
+	unsigned		ignore_oc:1;
 
 	/* required for usb32 quirk */
 	#define OHCI_CTRL_HCFS          (3 << 6)
--- a/include/linux/usb/ehci_pdriver.h
+++ b/include/linux/usb/ehci_pdriver.h
@@ -49,6 +49,7 @@ struct usb_ehci_pdata {
 	unsigned	no_io_watchdog:1;
 	unsigned	reset_on_resume:1;
 	unsigned	dma_mask_64:1;
+	unsigned	ignore_oc:1;
 
 	/* Turn on all power and clocks */
 	int (*power_on)(struct platform_device *pdev);
