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>

diff --git a/Documentation/devicetree/bindings/usb/usb-ohci.txt b/Documentation/devicetree/bindings/usb/usb-ohci.txt
index 6ba38d9..6933b0c 100644 (file)
--- 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 49304dd..e2c28fd 100644 (file)
--- 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);