ohci-platform: Add support for controllers with big-endian regs / descriptors

Note this commit uses the same devicetree booleans for this as the ones
already existing in the usb-ehci bindings, see:
Documentation/devicetree/bindings/usb/usb-ehci.txt

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 30 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/usb-ohci.txt b/Documentation/devicetree/bindings/usb/usb-ohci.txt
index 6ba38d990d16..6933b0c6487d 100644
--- a/Documentation/devicetree/bindings/usb/usb-ohci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-ohci.txt
@@ -6,6 +6,9 @@ Required properties:
 - interrupts : ohci controller interrupt
 
 Optional properties:
+- big-endian-regs : boolean, set this for hcds with big-endian registers
+- big-endian-desc : boolean, set this for hcds with big-endian descriptors
+- big-endian : boolean, for hcds with big-endian-regs + big-endian-desc
 - clocks : a list of phandle + clock specifier pairs
 - phys : phandle + phy specifier pair
 - phy-names : "usb"
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 49304ddde422..e2c28fd03484 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -128,6 +128,7 @@ static int ohci_platform_probe(struct platform_device *dev)
         struct resource *res_mem;
         struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
         struct ohci_platform_priv *priv;
+        struct ohci_hcd *ohci;
         int err, irq, clk = 0;
 
         if (usb_disabled())
@@ -164,8 +165,34 @@ static int ohci_platform_probe(struct platform_device *dev)
         platform_set_drvdata(dev, hcd);
         dev->dev.platform_data = pdata;
         priv = hcd_to_ohci_priv(hcd);
+        ohci = hcd_to_ohci(hcd);
 
         if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
+                if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
+                        ohci->flags |= OHCI_QUIRK_BE_MMIO;
+
+                if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
+                        ohci->flags |= OHCI_QUIRK_BE_DESC;
+
+                if (of_property_read_bool(dev->dev.of_node, "big-endian"))
+                        ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
+
+#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
+                if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
+                        dev_err(&dev->dev,
+                                "Error big-endian-regs not compiled in\n");
+                        err = -EINVAL;
+                        goto err_put_hcd;
+                }
+#endif
+#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
+                if (ohci->flags & OHCI_QUIRK_BE_DESC) {
+                        dev_err(&dev->dev,
+                                "Error big-endian-desc not compiled in\n");
+                        err = -EINVAL;
+                        goto err_put_hcd;
+                }
+#endif
                 priv->phy = devm_phy_get(&dev->dev, "usb");
                 if (IS_ERR(priv->phy)) {
                         err = PTR_ERR(priv->phy);