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path: root/drivers/usb/host/xhci-plat.c
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Diffstat (limited to 'drivers/usb/host/xhci-plat.c')
-rw-r--r--drivers/usb/host/xhci-plat.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
new file mode 100644
index 000000000000..689bc18b051d
--- /dev/null
+++ b/drivers/usb/host/xhci-plat.c
@@ -0,0 +1,205 @@
+/*
+ * xhci-plat.c - xHCI host controller driver platform Bus Glue.
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ *
+ * A lot of code borrowed from the Linux xHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "xhci.h"
+
+static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
+{
+ /*
+ * As of now platform drivers don't provide MSI support so we ensure
+ * here that the generic code does not try to make a pci_dev from our
+ * dev struct in order to setup MSI
+ */
+ xhci->quirks |= XHCI_BROKEN_MSI;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_plat_setup(struct usb_hcd *hcd)
+{
+ return xhci_gen_setup(hcd, xhci_plat_quirks);
+}
+
+static const struct hc_driver xhci_plat_xhci_driver = {
+ .description = "xhci-hcd",
+ .product_desc = "xHCI Host Controller",
+ .hcd_priv_size = sizeof(struct xhci_hcd *),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = xhci_irq,
+ .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = xhci_plat_setup,
+ .start = xhci_run,
+ .stop = xhci_stop,
+ .shutdown = xhci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = xhci_urb_enqueue,
+ .urb_dequeue = xhci_urb_dequeue,
+ .alloc_dev = xhci_alloc_dev,
+ .free_dev = xhci_free_dev,
+ .alloc_streams = xhci_alloc_streams,
+ .free_streams = xhci_free_streams,
+ .add_endpoint = xhci_add_endpoint,
+ .drop_endpoint = xhci_drop_endpoint,
+ .endpoint_reset = xhci_endpoint_reset,
+ .check_bandwidth = xhci_check_bandwidth,
+ .reset_bandwidth = xhci_reset_bandwidth,
+ .address_device = xhci_address_device,
+ .update_hub_device = xhci_update_hub_device,
+ .reset_device = xhci_discover_or_reset_device,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = xhci_get_frame,
+
+ /* Root hub support */
+ .hub_control = xhci_hub_control,
+ .hub_status_data = xhci_hub_status_data,
+ .bus_suspend = xhci_bus_suspend,
+ .bus_resume = xhci_bus_resume,
+};
+
+static int xhci_plat_probe(struct platform_device *pdev)
+{
+ const struct hc_driver *driver;
+ struct xhci_hcd *xhci;
+ struct resource *res;
+ struct usb_hcd *hcd;
+ int ret;
+ int irq;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ driver = &xhci_plat_xhci_driver;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+ driver->description)) {
+ dev_dbg(&pdev->dev, "controller already in use\n");
+ ret = -EBUSY;
+ goto put_hcd;
+ }
+
+ hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+ if (!hcd->regs) {
+ dev_dbg(&pdev->dev, "error mapping memory\n");
+ ret = -EFAULT;
+ goto release_mem_region;
+ }
+
+ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto unmap_registers;
+
+ /* USB 2.0 roothub is stored in the platform_device now. */
+ hcd = dev_get_drvdata(&pdev->dev);
+ xhci = hcd_to_xhci(hcd);
+ xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
+ dev_name(&pdev->dev), hcd);
+ if (!xhci->shared_hcd) {
+ ret = -ENOMEM;
+ goto dealloc_usb2_hcd;
+ }
+
+ /*
+ * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
+ * is called by usb_add_hcd().
+ */
+ *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
+
+ ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto put_usb3_hcd;
+
+ return 0;
+
+put_usb3_hcd:
+ usb_put_hcd(xhci->shared_hcd);
+
+dealloc_usb2_hcd:
+ usb_remove_hcd(hcd);
+
+unmap_registers:
+ iounmap(hcd->regs);
+
+release_mem_region:
+ release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+
+put_hcd:
+ usb_put_hcd(hcd);
+
+ return ret;
+}
+
+static int xhci_plat_remove(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ usb_remove_hcd(xhci->shared_hcd);
+ usb_put_hcd(xhci->shared_hcd);
+
+ usb_remove_hcd(hcd);
+ iounmap(hcd->regs);
+ usb_put_hcd(hcd);
+ kfree(xhci);
+
+ return 0;
+}
+
+static struct platform_driver usb_xhci_driver = {
+ .probe = xhci_plat_probe,
+ .remove = xhci_plat_remove,
+ .driver = {
+ .name = "xhci-hcd",
+ },
+};
+MODULE_ALIAS("platform:xhci-hcd");
+
+int xhci_register_plat(void)
+{
+ return platform_driver_register(&usb_xhci_driver);
+}
+
+void xhci_unregister_plat(void)
+{
+ platform_driver_unregister(&usb_xhci_driver);
+}