2 * Generic platform ehci driver
4 * Copyright 2007 Steven Brown <sbrown@cortland.com>
5 * Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
7 * Derived from the ohci-ssb driver
8 * Copyright 2007 Michael Buesch <m@bues.ch>
10 * Derived from the EHCI-PCI driver
11 * Copyright (c) 2000-2004 by David Brownell
13 * Derived from the ohci-pci driver
14 * Copyright 1999 Roman Weissgaerber
15 * Copyright 2000-2002 David Brownell
16 * Copyright 1999 Linus Torvalds
17 * Copyright 1999 Gregory P. Smith
19 * Licensed under the GNU/GPL. See COPYING for details.
21 #include <linux/err.h>
22 #include <linux/kernel.h>
23 #include <linux/hrtimer.h>
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/usb.h>
28 #include <linux/usb/hcd.h>
29 #include <linux/usb/ehci_pdriver.h>
33 #define DRIVER_DESC "EHCI generic platform driver"
35 static const char hcd_name[] = "ehci-platform";
37 static int ehci_platform_reset(struct usb_hcd *hcd)
39 struct platform_device *pdev = to_platform_device(hcd->self.controller);
40 struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
41 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
44 hcd->has_tt = pdata->has_tt;
45 ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
46 ehci->big_endian_desc = pdata->big_endian_desc;
47 ehci->big_endian_mmio = pdata->big_endian_mmio;
49 ehci->caps = hcd->regs + pdata->caps_offset;
50 retval = ehci_setup(hcd);
54 if (pdata->no_io_watchdog)
55 ehci->need_io_watchdog = 0;
59 static struct hc_driver __read_mostly ehci_platform_hc_driver;
61 static const struct ehci_driver_overrides platform_overrides __initdata = {
62 .reset = ehci_platform_reset,
65 static int ehci_platform_probe(struct platform_device *dev)
68 struct resource *res_mem;
69 struct usb_ehci_pdata *pdata = dev->dev.platform_data;
81 irq = platform_get_irq(dev, 0);
83 dev_err(&dev->dev, "no irq provided");
86 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
88 dev_err(&dev->dev, "no memory resource provided");
92 if (pdata->power_on) {
93 err = pdata->power_on(dev);
98 hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
105 hcd->rsrc_start = res_mem->start;
106 hcd->rsrc_len = resource_size(res_mem);
108 hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
109 if (IS_ERR(hcd->regs)) {
110 err = PTR_ERR(hcd->regs);
113 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
117 platform_set_drvdata(dev, hcd);
124 if (pdata->power_off)
125 pdata->power_off(dev);
130 static int ehci_platform_remove(struct platform_device *dev)
132 struct usb_hcd *hcd = platform_get_drvdata(dev);
133 struct usb_ehci_pdata *pdata = dev->dev.platform_data;
137 platform_set_drvdata(dev, NULL);
139 if (pdata->power_off)
140 pdata->power_off(dev);
147 static int ehci_platform_suspend(struct device *dev)
149 struct usb_hcd *hcd = dev_get_drvdata(dev);
150 struct usb_ehci_pdata *pdata = dev->platform_data;
151 struct platform_device *pdev =
152 container_of(dev, struct platform_device, dev);
153 bool do_wakeup = device_may_wakeup(dev);
156 ret = ehci_suspend(hcd, do_wakeup);
158 if (pdata->power_suspend)
159 pdata->power_suspend(pdev);
164 static int ehci_platform_resume(struct device *dev)
166 struct usb_hcd *hcd = dev_get_drvdata(dev);
167 struct usb_ehci_pdata *pdata = dev->platform_data;
168 struct platform_device *pdev =
169 container_of(dev, struct platform_device, dev);
171 if (pdata->power_on) {
172 int err = pdata->power_on(pdev);
177 ehci_resume(hcd, false);
181 #else /* !CONFIG_PM */
182 #define ehci_platform_suspend NULL
183 #define ehci_platform_resume NULL
184 #endif /* CONFIG_PM */
186 static const struct platform_device_id ehci_platform_table[] = {
187 { "ehci-platform", 0 },
190 MODULE_DEVICE_TABLE(platform, ehci_platform_table);
192 static const struct dev_pm_ops ehci_platform_pm_ops = {
193 .suspend = ehci_platform_suspend,
194 .resume = ehci_platform_resume,
197 static struct platform_driver ehci_platform_driver = {
198 .id_table = ehci_platform_table,
199 .probe = ehci_platform_probe,
200 .remove = ehci_platform_remove,
201 .shutdown = usb_hcd_platform_shutdown,
203 .owner = THIS_MODULE,
204 .name = "ehci-platform",
205 .pm = &ehci_platform_pm_ops,
209 static int __init ehci_platform_init(void)
214 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
216 ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides);
217 return platform_driver_register(&ehci_platform_driver);
219 module_init(ehci_platform_init);
221 static void __exit ehci_platform_cleanup(void)
223 platform_driver_unregister(&ehci_platform_driver);
225 module_exit(ehci_platform_cleanup);
227 MODULE_DESCRIPTION(DRIVER_DESC);
228 MODULE_AUTHOR("Hauke Mehrtens");
229 MODULE_AUTHOR("Alan Stern");
230 MODULE_LICENSE("GPL");