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