USB: ohci-pxa27x: add DT bindings

Add DT bindings to the ohci-pxa27x driver and some documentation.

Successfully tested on a PXA3xx board.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/usb/pxa-usb.txt b/Documentation/devicetree/bindings/usb/pxa-usb.txt
new file mode 100644 (file)
index 0000000..79729a9
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/pxa-usb.txt
@@ -0,0 +1,31 @@
+PXA USB controllers
+
+OHCI
+
+Required properties:
+ - compatible: Should be "marvell,pxa-ohci" for USB controllers
+   used in host mode.
+
+Optional properties:
+ - "marvell,enable-port1", "marvell,enable-port2", "marvell,enable-port3"
+   If present, enables the appropriate USB port of the controller.
+ - "marvell,port-mode" selects the mode of the ports:
+       1 = PMM_NPS_MODE
+       2 = PMM_GLOBAL_MODE
+       3 = PMM_PERPORT_MODE
+ - "marvell,power-sense-low" - power sense pin is low-active.
+ - "marvell,power-control-low" - power control pin is low-active.
+ - "marvell,no-oc-protection" - disable over-current protection.
+ - "marvell,oc-mode-perport" - enable per-port over-current protection.
+ - "marvell,power_on_delay" Power On to Power Good time - in ms.
+
+Example:
+
+       usb0: ohci@4c000000 {
+               compatible = "marvell,pxa-ohci", "usb-ohci";
+               reg = <0x4c000000 0x100000>;
+               interrupts = <18>;
+               marvell,enable-port1;
+               marvell,port-mode = <2>; /* PMM_GLOBAL_MODE */
+       };
+

diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index e1a3cc6..77f4402 100644 (file)
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -23,6 +23,8 @@
 #include <linux/signal.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
 #include <mach/hardware.h>
 #include <mach/ohci.h>
 #include <mach/pxa3xx-u2d.h>
@@ -272,6 +274,67 @@ static void pxa27x_stop_hc(struct pxa27x_ohci *ohci, struct device *dev)
        clk_disable_unprepare(ohci->clk);
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id pxa_ohci_dt_ids[] = {
+       { .compatible = "marvell,pxa-ohci" },
+       { }
+};
+
+MODULE_DEVICE_TABLE(of, pxa_ohci_dt_ids);
+
+static u64 pxa_ohci_dma_mask = DMA_BIT_MASK(32);
+
+static int __devinit ohci_pxa_of_init(struct platform_device *pdev)
+{
+       struct device_node *np = pdev->dev.of_node;
+       struct pxaohci_platform_data *pdata;
+       u32 tmp;
+
+       if (!np)
+               return 0;
+
+       /* Right now device-tree probed devices don't get dma_mask set.
+        * Since shared usb code relies on it, set it here for now.
+        * Once we have dma capability bindings this can go away.
+        */
+       if (!pdev->dev.dma_mask)
+               pdev->dev.dma_mask = &pxa_ohci_dma_mask;
+
+       pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+       if (!pdata)
+               return -ENOMEM;
+
+       if (of_get_property(np, "marvell,enable-port1", NULL))
+               pdata->flags |= ENABLE_PORT1;
+       if (of_get_property(np, "marvell,enable-port2", NULL))
+               pdata->flags |= ENABLE_PORT2;
+       if (of_get_property(np, "marvell,enable-port3", NULL))
+               pdata->flags |= ENABLE_PORT3;
+       if (of_get_property(np, "marvell,port-sense-low", NULL))
+               pdata->flags |= POWER_SENSE_LOW;
+       if (of_get_property(np, "marvell,power-control-low", NULL))
+               pdata->flags |= POWER_CONTROL_LOW;
+       if (of_get_property(np, "marvell,no-oc-protection", NULL))
+               pdata->flags |= NO_OC_PROTECTION;
+       if (of_get_property(np, "marvell,oc-mode-perport", NULL))
+               pdata->flags |= OC_MODE_PERPORT;
+       if (!of_property_read_u32(np, "marvell,power-on-delay", &tmp))
+               pdata->power_on_delay = tmp;
+       if (!of_property_read_u32(np, "marvell,port-mode", &tmp))
+               pdata->port_mode = tmp;
+       if (!of_property_read_u32(np, "marvell,power-budget", &tmp))
+               pdata->power_budget = tmp;
+
+       pdev->dev.platform_data = pdata;
+
+       return 0;
+}
+#else
+static int __devinit ohci_pxa_of_init(struct platform_device *pdev)
+{
+       return 0;
+}
+#endif
 
 /*-------------------------------------------------------------------------*/
 
@@ -297,6 +360,10 @@ int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device
        struct resource *r;
        struct clk *usb_clk;
 
+       retval = ohci_pxa_of_init(pdev);
+       if (retval)
+               return retval;
+
        inf = pdev->dev.platform_data;
 
        if (!inf)
@@ -544,6 +611,7 @@ static struct platform_driver ohci_hcd_pxa27x_driver = {
        .driver         = {
                .name   = "pxa27x-ohci",
                .owner  = THIS_MODULE,
+               .of_match_table = of_match_ptr(pxa_ohci_dt_ids),
 #ifdef CONFIG_PM
                .pm     = &ohci_hcd_pxa27x_pm_ops,
 #endif