1 // SPDX-License-Identifier: GPL-2.0+
3  * (C) Copyright David Brownell 2000-2002
23 /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
38 	return pdev->class == CL_OHCI || pdev->class == CL_UHCI;  in is_ohci_or_uhci()
50 	unsigned int		slot = PCI_SLOT(pdev->devfn);  in for_each_companion()
59 		if (companion->bus != pdev->bus ||  in for_each_companion()
60 				PCI_SLOT(companion->devfn) != slot)  in for_each_companion()
67 		if (companion->class != CL_UHCI && companion->class != CL_OHCI &&  in for_each_companion()
68 				companion->class != CL_EHCI)  in for_each_companion()
72 		if (!companion_hcd || !companion_hcd->self.root_hub)  in for_each_companion()
90 		udev = companion_hcd->self.root_hub;  in ehci_pre_add()
107 		if (dev_get_drvdata(&pdev->dev)) {	/* Succeeded */  in ehci_post_add()
108 			dev_dbg(&pdev->dev, "HS companion for %s\n",  in ehci_post_add()
109 					dev_name(&companion->dev));  in ehci_post_add()
110 			companion_hcd->self.hs_companion = &hcd->self;  in ehci_post_add()
112 		udev = companion_hcd->self.root_hub;  in ehci_post_add()
119  * We just added a non-EHCI controller.  Find the EHCI controller to
125 	if (is_ohci_or_uhci(pdev) && companion->class == CL_EHCI) {  in non_ehci_add()
126 		dev_dbg(&pdev->dev, "FS/LS companion for %s\n",  in non_ehci_add()
127 				dev_name(&companion->dev));  in non_ehci_add()
128 		hcd->self.hs_companion = &companion_hcd->self;  in non_ehci_add()
137 		companion_hcd->self.hs_companion = NULL;  in ehci_remove()
147 		device_pm_wait_for_dev(&pdev->dev, &companion->dev);  in ehci_wait_for_companions()
152 /*-------------------------------------------------------------------------*/
158  * usb_hcd_pci_probe - initialize PCI-based HCDs
179 		return -ENODEV;  in usb_hcd_pci_probe()
182 		return -EINVAL;  in usb_hcd_pci_probe()
185 		return -ENODEV;  in usb_hcd_pci_probe()
188 	 * The xHCI driver has its own irq management  in usb_hcd_pci_probe()
189 	 * make sure irq setup is not touched for xhci in generic hcd code  in usb_hcd_pci_probe()
191 	if ((driver->flags & HCD_MASK) < HCD_USB3) {  in usb_hcd_pci_probe()
194 			dev_err(&dev->dev,  in usb_hcd_pci_probe()
197 			retval = -ENODEV;  in usb_hcd_pci_probe()
203 	hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));  in usb_hcd_pci_probe()
205 		retval = -ENOMEM;  in usb_hcd_pci_probe()
209 	hcd->amd_resume_bug = usb_hcd_amd_resume_bug(dev, driver);  in usb_hcd_pci_probe()
211 	if (driver->flags & HCD_MEMORY) {  in usb_hcd_pci_probe()
213 		hcd->rsrc_start = pci_resource_start(dev, 0);  in usb_hcd_pci_probe()
214 		hcd->rsrc_len = pci_resource_len(dev, 0);  in usb_hcd_pci_probe()
215 		if (!devm_request_mem_region(&dev->dev, hcd->rsrc_start,  in usb_hcd_pci_probe()
216 				hcd->rsrc_len, driver->description)) {  in usb_hcd_pci_probe()
217 			dev_dbg(&dev->dev, "controller already in use\n");  in usb_hcd_pci_probe()
218 			retval = -EBUSY;  in usb_hcd_pci_probe()
221 		hcd->regs = devm_ioremap(&dev->dev, hcd->rsrc_start,  in usb_hcd_pci_probe()
222 				hcd->rsrc_len);  in usb_hcd_pci_probe()
223 		if (hcd->regs == NULL) {  in usb_hcd_pci_probe()
224 			dev_dbg(&dev->dev, "error mapping memory\n");  in usb_hcd_pci_probe()
225 			retval = -EFAULT;  in usb_hcd_pci_probe()
238 			hcd->rsrc_start = pci_resource_start(dev, region);  in usb_hcd_pci_probe()
239 			hcd->rsrc_len = pci_resource_len(dev, region);  in usb_hcd_pci_probe()
240 			if (devm_request_region(&dev->dev, hcd->rsrc_start,  in usb_hcd_pci_probe()
241 					hcd->rsrc_len, driver->description))  in usb_hcd_pci_probe()
245 			dev_dbg(&dev->dev, "no i/o regions available\n");  in usb_hcd_pci_probe()
246 			retval = -EBUSY;  in usb_hcd_pci_probe()
254 	if (dev->class == CL_EHCI) {  in usb_hcd_pci_probe()
256 		dev_set_drvdata(&dev->dev, hcd);  in usb_hcd_pci_probe()
260 			dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_probe()
265 		dev_set_drvdata(&dev->dev, hcd);  in usb_hcd_pci_probe()
268 			dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_probe()
276 	device_wakeup_enable(hcd->self.controller);  in usb_hcd_pci_probe()
279 		pm_runtime_put_noidle(&dev->dev);  in usb_hcd_pci_probe()
285 	if ((driver->flags & HCD_MASK) < HCD_USB3)  in usb_hcd_pci_probe()
289 	dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);  in usb_hcd_pci_probe()
299  * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
319 	hcd_driver_flags = hcd->driver->flags;  in usb_hcd_pci_remove()
322 		pm_runtime_get_noresume(&dev->dev);  in usb_hcd_pci_remove()
333 	if (dev->class == CL_EHCI) {  in usb_hcd_pci_remove()
337 		dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_remove()
342 		hcd->self.hs_companion = NULL;  in usb_hcd_pci_remove()
344 		dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_remove()
355  * usb_hcd_pci_shutdown - shutdown host controller
366 	if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&  in usb_hcd_pci_shutdown()
367 			hcd->driver->shutdown) {  in usb_hcd_pci_shutdown()
368 		hcd->driver->shutdown(hcd);  in usb_hcd_pci_shutdown()
369 		if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)  in usb_hcd_pci_shutdown()
370 			free_irq(hcd->irq, hcd);  in usb_hcd_pci_shutdown()
405 		return -EBUSY;  in check_root_hub_suspended()
407 	if (hcd->shared_hcd) {  in check_root_hub_suspended()
408 		hcd = hcd->shared_hcd;  in check_root_hub_suspended()
411 			return -EBUSY;  in check_root_hub_suspended()
435 	if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {  in suspend_common()
436 		/* Optimization: Don't suspend if a root-hub wakeup is  in suspend_common()
440 			return -EBUSY;  in suspend_common()
441 		if (do_wakeup && hcd->shared_hcd &&  in suspend_common()
442 				HCD_WAKEUP_PENDING(hcd->shared_hcd))  in suspend_common()
443 			return -EBUSY;  in suspend_common()
444 		retval = hcd->driver->pci_suspend(hcd, do_wakeup);  in suspend_common()
445 		suspend_report_result(dev, hcd->driver->pci_suspend, retval);  in suspend_common()
449 				(retval == 0 && do_wakeup && hcd->shared_hcd &&  in suspend_common()
450 				 HCD_WAKEUP_PENDING(hcd->shared_hcd))) {  in suspend_common()
451 			if (hcd->driver->pci_resume)  in suspend_common()
452 				hcd->driver->pci_resume(hcd, msg);  in suspend_common()
453 			retval = -EBUSY;  in suspend_common()
459 	/* If MSI-X is enabled, the driver will have synchronized all vectors  in suspend_common()
463 	if (!hcd->msix_enabled)  in suspend_common()
482 			(hcd->shared_hcd &&  in resume_common()
483 			 HCD_RH_RUNNING(hcd->shared_hcd))) {  in resume_common()
490 		dev_err(dev, "can't re-enable after resume, %d!\n", retval);  in resume_common()
496 	if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {  in resume_common()
503 		if (pci_dev->class == CL_EHCI && msg.event != PM_EVENT_AUTO_RESUME)  in resume_common()
507 		retval = hcd->driver->pci_resume(hcd, msg);  in resume_common()
509 			dev_err(dev, "PCI post-resume error %d!\n", retval);  in resume_common()
544 	 * choose the appropriate low-power state, and go to that state.  in hcd_pci_suspend_noirq()
547 	if (retval == -EIO) {		/* Low-power not supported */  in hcd_pci_suspend_noirq()
548 		dev_dbg(dev, "--> PCI D0 legacy\n");  in hcd_pci_suspend_noirq()
551 		dev_dbg(dev, "--> PCI %s\n",  in hcd_pci_suspend_noirq()
552 				pci_power_name(pci_dev->current_state));  in hcd_pci_suspend_noirq()
567 	if (hcd->driver->pci_poweroff_late && !HCD_DEAD(hcd))  in hcd_pci_poweroff_late()
568 		return hcd->driver->pci_poweroff_late(hcd, device_may_wakeup(dev));  in hcd_pci_poweroff_late()