Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / usb / host / uhci-platform.c

diff --git a/kernel/drivers/usb/host/uhci-platform.c b/kernel/drivers/usb/host/uhci-platform.c
new file mode 100644 (file)
index 0000000..3a3e3ee
--- /dev/null
+++ b/kernel/drivers/usb/host/uhci-platform.c
@@ -0,0 +1,152 @@
+/*
+ * Generic UHCI HCD (Host Controller Driver) for Platform Devices
+ *
+ * Copyright (c) 2011 Tony Prisk <linux@prisktech.co.nz>
+ *
+ * This file is based on uhci-grlib.c
+ * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
+ */
+
+#include <linux/of.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+
+static int uhci_platform_init(struct usb_hcd *hcd)
+{
+       struct uhci_hcd *uhci = hcd_to_uhci(hcd);
+
+       uhci->rh_numports = uhci_count_ports(hcd);
+
+       /* Set up pointers to to generic functions */
+       uhci->reset_hc = uhci_generic_reset_hc;
+       uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
+
+       /* No special actions need to be taken for the functions below */
+       uhci->configure_hc = NULL;
+       uhci->resume_detect_interrupts_are_broken = NULL;
+       uhci->global_suspend_mode_is_broken = NULL;
+
+       /* Reset if the controller isn't already safely quiescent. */
+       check_and_reset_hc(uhci);
+       return 0;
+}
+
+static const struct hc_driver uhci_platform_hc_driver = {
+       .description =          hcd_name,
+       .product_desc =         "Generic UHCI Host Controller",
+       .hcd_priv_size =        sizeof(struct uhci_hcd),
+
+       /* Generic hardware linkage */
+       .irq =                  uhci_irq,
+       .flags =                HCD_MEMORY | HCD_USB11,
+
+       /* Basic lifecycle operations */
+       .reset =                uhci_platform_init,
+       .start =                uhci_start,
+#ifdef CONFIG_PM
+       .pci_suspend =          NULL,
+       .pci_resume =           NULL,
+       .bus_suspend =          uhci_rh_suspend,
+       .bus_resume =           uhci_rh_resume,
+#endif
+       .stop =                 uhci_stop,
+
+       .urb_enqueue =          uhci_urb_enqueue,
+       .urb_dequeue =          uhci_urb_dequeue,
+
+       .endpoint_disable =     uhci_hcd_endpoint_disable,
+       .get_frame_number =     uhci_hcd_get_frame_number,
+
+       .hub_status_data =      uhci_hub_status_data,
+       .hub_control =          uhci_hub_control,
+};
+
+static int uhci_hcd_platform_probe(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd;
+       struct uhci_hcd *uhci;
+       struct resource *res;
+       int ret;
+
+       if (usb_disabled())
+               return -ENODEV;
+
+       /*
+        * 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.
+        */
+       ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+       if (ret)
+               return ret;
+
+       hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
+                       pdev->name);
+       if (!hcd)
+               return -ENOMEM;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(hcd->regs)) {
+               ret = PTR_ERR(hcd->regs);
+               goto err_rmr;
+       }
+       hcd->rsrc_start = res->start;
+       hcd->rsrc_len = resource_size(res);
+
+       uhci = hcd_to_uhci(hcd);
+
+       uhci->regs = hcd->regs;
+
+       ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
+       if (ret)
+               goto err_rmr;
+
+       device_wakeup_enable(hcd->self.controller);
+       return 0;
+
+err_rmr:
+       usb_put_hcd(hcd);
+
+       return ret;
+}
+
+static int uhci_hcd_platform_remove(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+       usb_remove_hcd(hcd);
+       usb_put_hcd(hcd);
+
+       return 0;
+}
+
+/* Make sure the controller is quiescent and that we're not using it
+ * any more.  This is mainly for the benefit of programs which, like kexec,
+ * expect the hardware to be idle: not doing DMA or generating IRQs.
+ *
+ * This routine may be called in a damaged or failing kernel.  Hence we
+ * do not acquire the spinlock before shutting down the controller.
+ */
+static void uhci_hcd_platform_shutdown(struct platform_device *op)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(op);
+
+       uhci_hc_died(hcd_to_uhci(hcd));
+}
+
+static const struct of_device_id platform_uhci_ids[] = {
+       { .compatible = "generic-uhci", },
+       { .compatible = "platform-uhci", },
+       {}
+};
+
+static struct platform_driver uhci_platform_driver = {
+       .probe          = uhci_hcd_platform_probe,
+       .remove         = uhci_hcd_platform_remove,
+       .shutdown       = uhci_hcd_platform_shutdown,
+       .driver = {
+               .name = "platform-uhci",
+               .of_match_table = platform_uhci_ids,
+       },
+};