/* * Generic platform ohci driver * * Copyright 2007 Michael Buesch <m@bues.ch> * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de> * * Derived from the OCHI-SSB driver * Derived from the OHCI-PCI driver * Copyright 1999 Roman Weissgaerber * Copyright 2000-2002 David Brownell * Copyright 1999 Linus Torvalds * Copyright 1999 Gregory P. Smith * * Licensed under the GNU/GPL. See COPYING for details. */ #include <linux/platform_device.h> #include <linux/usb/ohci_pdriver.h> static int ohci_platform_reset(struct usb_hcd *hcd) { struct platform_device *pdev = to_platform_device(hcd->self.controller); struct usb_ohci_pdata *pdata = pdev->dev.platform_data; struct ohci_hcd *ohci = hcd_to_ohci(hcd); int err; if (pdata->big_endian_desc) ohci->flags |= OHCI_QUIRK_BE_DESC; if (pdata->big_endian_mmio) ohci->flags |= OHCI_QUIRK_BE_MMIO; if (pdata->no_big_frame_no) ohci->flags |= OHCI_QUIRK_FRAME_NO; ohci_hcd_init(ohci); err = ohci_init(ohci); return err; } static int ohci_platform_start(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); int err; err = ohci_run(ohci); if (err < 0) { ohci_err(ohci, "can't start\n"); ohci_stop(hcd); } return err; } static const struct hc_driver ohci_platform_hc_driver = { .description = hcd_name, .product_desc = "Generic Platform OHCI Controller", .hcd_priv_size = sizeof(struct ohci_hcd), .irq = ohci_irq, .flags = HCD_MEMORY | HCD_USB11, .reset = ohci_platform_reset, .start = ohci_platform_start, .stop = ohci_stop, .shutdown = ohci_shutdown, .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, .get_frame_number = ohci_get_frame, .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; static int __devinit ohci_platform_probe(struct platform_device *dev) { struct usb_hcd *hcd; struct resource *res_mem; int irq; int err = -ENOMEM; BUG_ON(!dev->dev.platform_data); if (usb_disabled()) return -ENODEV; irq = platform_get_irq(dev, 0); if (irq < 0) { pr_err("no irq provided"); return irq; } res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0); if (!res_mem) { pr_err("no memory recourse provided"); return -ENXIO; } hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev, dev_name(&dev->dev)); if (!hcd) return -ENOMEM; hcd->rsrc_start = res_mem->start; hcd->rsrc_len = resource_size(res_mem); if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { pr_err("controller already in use"); err = -EBUSY; goto err_put_hcd; } hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) goto err_release_region; err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) goto err_iounmap; platform_set_drvdata(dev, hcd); return err; err_iounmap: iounmap(hcd->regs); err_release_region: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err_put_hcd: usb_put_hcd(hcd); return err; } static int __devexit ohci_platform_remove(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); usb_remove_hcd(hcd); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); platform_set_drvdata(dev, NULL); return 0; } #ifdef CONFIG_PM static int ohci_platform_suspend(struct device *dev) { return 0; } static int ohci_platform_resume(struct device *dev) { struct usb_hcd *hcd = dev_get_drvdata(dev); ohci_finish_controller_resume(hcd); return 0; } #else /* !CONFIG_PM */ #define ohci_platform_suspend NULL #define ohci_platform_resume NULL #endif /* CONFIG_PM */ static const struct platform_device_id ohci_platform_table[] = { { "ohci-platform", 0 }, { } }; MODULE_DEVICE_TABLE(platform, ohci_platform_table); static const struct dev_pm_ops ohci_platform_pm_ops = { .suspend = ohci_platform_suspend, .resume = ohci_platform_resume, }; static struct platform_driver ohci_platform_driver = { .id_table = ohci_platform_table, .probe = ohci_platform_probe, .remove = __devexit_p(ohci_platform_remove), .shutdown = usb_hcd_platform_shutdown, .driver = { .owner = THIS_MODULE, .name = "ohci-platform", .pm = &ohci_platform_pm_ops, } };