| /* |
| * 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_nocache(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); |
| } |