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- /*
- * 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/hrtimer.h>
- #include <linux/io.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/err.h>
- #include <linux/platform_device.h>
- #include <linux/usb/ohci_pdriver.h>
- #include <linux/usb.h>
- #include <linux/usb/hcd.h>
- #include "ohci.h"
- #define DRIVER_DESC "OHCI generic platform driver"
- static const char hcd_name[] = "ohci-platform";
- 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);
- 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;
- if (pdata->num_ports)
- ohci->num_ports = pdata->num_ports;
- return ohci_setup(hcd);
- }
- static struct hc_driver __read_mostly ohci_platform_hc_driver;
- static const struct ohci_driver_overrides platform_overrides __initconst = {
- .product_desc = "Generic Platform OHCI controller",
- .reset = ohci_platform_reset,
- };
- static int ohci_platform_probe(struct platform_device *dev)
- {
- struct usb_hcd *hcd;
- struct resource *res_mem;
- struct usb_ohci_pdata *pdata = dev->dev.platform_data;
- int irq;
- int err = -ENOMEM;
- if (!pdata) {
- WARN_ON(1);
- return -ENODEV;
- }
- if (usb_disabled())
- return -ENODEV;
- irq = platform_get_irq(dev, 0);
- if (irq < 0) {
- dev_err(&dev->dev, "no irq provided");
- return irq;
- }
- res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!res_mem) {
- dev_err(&dev->dev, "no memory resource provided");
- return -ENXIO;
- }
- if (pdata->power_on) {
- err = pdata->power_on(dev);
- if (err < 0)
- return err;
- }
- hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
- dev_name(&dev->dev));
- if (!hcd) {
- err = -ENOMEM;
- goto err_power;
- }
- hcd->rsrc_start = res_mem->start;
- hcd->rsrc_len = resource_size(res_mem);
- hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
- if (IS_ERR(hcd->regs)) {
- err = PTR_ERR(hcd->regs);
- goto err_put_hcd;
- }
- err = usb_add_hcd(hcd, irq, IRQF_SHARED);
- if (err)
- goto err_put_hcd;
- platform_set_drvdata(dev, hcd);
- return err;
- err_put_hcd:
- usb_put_hcd(hcd);
- err_power:
- if (pdata->power_off)
- pdata->power_off(dev);
- return err;
- }
- static int ohci_platform_remove(struct platform_device *dev)
- {
- struct usb_hcd *hcd = platform_get_drvdata(dev);
- struct usb_ohci_pdata *pdata = dev->dev.platform_data;
- usb_remove_hcd(hcd);
- usb_put_hcd(hcd);
- if (pdata->power_off)
- pdata->power_off(dev);
- return 0;
- }
- #ifdef CONFIG_PM
- static int ohci_platform_suspend(struct device *dev)
- {
- struct usb_ohci_pdata *pdata = dev->platform_data;
- struct platform_device *pdev =
- container_of(dev, struct platform_device, dev);
- if (pdata->power_suspend)
- pdata->power_suspend(pdev);
- return 0;
- }
- static int ohci_platform_resume(struct device *dev)
- {
- struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct usb_ohci_pdata *pdata = dev->platform_data;
- struct platform_device *pdev =
- container_of(dev, struct platform_device, dev);
- if (pdata->power_on) {
- int err = pdata->power_on(pdev);
- if (err < 0)
- return err;
- }
- ohci_resume(hcd, false);
- 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 = ohci_platform_remove,
- .shutdown = usb_hcd_platform_shutdown,
- .driver = {
- .owner = THIS_MODULE,
- .name = "ohci-platform",
- .pm = &ohci_platform_pm_ops,
- }
- };
- static int __init ohci_platform_init(void)
- {
- if (usb_disabled())
- return -ENODEV;
- pr_info("%s: " DRIVER_DESC "\n", hcd_name);
- ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
- return platform_driver_register(&ohci_platform_driver);
- }
- module_init(ohci_platform_init);
- static void __exit ohci_platform_cleanup(void)
- {
- platform_driver_unregister(&ohci_platform_driver);
- }
- module_exit(ohci_platform_cleanup);
- MODULE_DESCRIPTION(DRIVER_DESC);
- MODULE_AUTHOR("Hauke Mehrtens");
- MODULE_AUTHOR("Alan Stern");
- MODULE_LICENSE("GPL");
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