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()
195 			dev_err(&dev->dev,  in usb_hcd_pci_probe()
198 			retval = -ENODEV;  in usb_hcd_pci_probe()
204 	hcd = usb_create_hcd(driver, &dev->dev, pci_name(dev));  in usb_hcd_pci_probe()
206 		retval = -ENOMEM;  in usb_hcd_pci_probe()
210 	hcd->amd_resume_bug = usb_hcd_amd_resume_bug(dev, driver);  in usb_hcd_pci_probe()
212 	if (driver->flags & HCD_MEMORY) {  in usb_hcd_pci_probe()
214 		hcd->rsrc_start = pci_resource_start(dev, 0);  in usb_hcd_pci_probe()
215 		hcd->rsrc_len = pci_resource_len(dev, 0);  in usb_hcd_pci_probe()
216 		if (!devm_request_mem_region(&dev->dev, hcd->rsrc_start,  in usb_hcd_pci_probe()
217 				hcd->rsrc_len, driver->description)) {  in usb_hcd_pci_probe()
218 			dev_dbg(&dev->dev, "controller already in use\n");  in usb_hcd_pci_probe()
219 			retval = -EBUSY;  in usb_hcd_pci_probe()
222 		hcd->regs = devm_ioremap(&dev->dev, hcd->rsrc_start,  in usb_hcd_pci_probe()
223 				hcd->rsrc_len);  in usb_hcd_pci_probe()
224 		if (hcd->regs == NULL) {  in usb_hcd_pci_probe()
225 			dev_dbg(&dev->dev, "error mapping memory\n");  in usb_hcd_pci_probe()
226 			retval = -EFAULT;  in usb_hcd_pci_probe()
239 			hcd->rsrc_start = pci_resource_start(dev, region);  in usb_hcd_pci_probe()
240 			hcd->rsrc_len = pci_resource_len(dev, region);  in usb_hcd_pci_probe()
241 			if (devm_request_region(&dev->dev, hcd->rsrc_start,  in usb_hcd_pci_probe()
242 					hcd->rsrc_len, driver->description))  in usb_hcd_pci_probe()
246 			dev_dbg(&dev->dev, "no i/o regions available\n");  in usb_hcd_pci_probe()
247 			retval = -EBUSY;  in usb_hcd_pci_probe()
255 	if (dev->class == CL_EHCI) {  in usb_hcd_pci_probe()
257 		dev_set_drvdata(&dev->dev, hcd);  in usb_hcd_pci_probe()
261 			dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_probe()
266 		dev_set_drvdata(&dev->dev, hcd);  in usb_hcd_pci_probe()
269 			dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_probe()
277 	device_wakeup_enable(hcd->self.controller);  in usb_hcd_pci_probe()
280 		pm_runtime_put_noidle(&dev->dev);  in usb_hcd_pci_probe()
286 	if ((driver->flags & HCD_MASK) < HCD_USB3)  in usb_hcd_pci_probe()
290 	dev_err(&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);  in usb_hcd_pci_probe()
300  * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
320 	hcd_driver_flags = hcd->driver->flags;  in usb_hcd_pci_remove()
323 		pm_runtime_get_noresume(&dev->dev);  in usb_hcd_pci_remove()
334 	if (dev->class == CL_EHCI) {  in usb_hcd_pci_remove()
338 		dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_remove()
343 		hcd->self.hs_companion = NULL;  in usb_hcd_pci_remove()
345 		dev_set_drvdata(&dev->dev, NULL);  in usb_hcd_pci_remove()
356  * usb_hcd_pci_shutdown - shutdown host controller
367 	if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) &&  in usb_hcd_pci_shutdown()
368 			hcd->driver->shutdown) {  in usb_hcd_pci_shutdown()
369 		hcd->driver->shutdown(hcd);  in usb_hcd_pci_shutdown()
370 		if (usb_hcd_is_primary_hcd(hcd) && hcd->irq > 0)  in usb_hcd_pci_shutdown()
371 			free_irq(hcd->irq, hcd);  in usb_hcd_pci_shutdown()
406 		return -EBUSY;  in check_root_hub_suspended()
408 	if (hcd->shared_hcd) {  in check_root_hub_suspended()
409 		hcd = hcd->shared_hcd;  in check_root_hub_suspended()
412 			return -EBUSY;  in check_root_hub_suspended()
441 	if (hcd->driver->pci_suspend && !HCD_DEAD(hcd)) {  in suspend_common()
442 		/* Optimization: Don't suspend if a root-hub wakeup is  in suspend_common()
446 			return -EBUSY;  in suspend_common()
447 		if (do_wakeup && hcd->shared_hcd &&  in suspend_common()
448 				HCD_WAKEUP_PENDING(hcd->shared_hcd))  in suspend_common()
449 			return -EBUSY;  in suspend_common()
450 		retval = hcd->driver->pci_suspend(hcd, do_wakeup);  in suspend_common()
451 		suspend_report_result(dev, hcd->driver->pci_suspend, retval);  in suspend_common()
455 				(retval == 0 && do_wakeup && hcd->shared_hcd &&  in suspend_common()
456 				 HCD_WAKEUP_PENDING(hcd->shared_hcd))) {  in suspend_common()
457 			if (hcd->driver->pci_resume)  in suspend_common()
458 				hcd->driver->pci_resume(hcd, msg);  in suspend_common()
459 			retval = -EBUSY;  in suspend_common()
465 	/* If MSI-X is enabled, the driver will have synchronized all vectors  in suspend_common()
469 	if (!hcd->msix_enabled)  in suspend_common()
488 			(hcd->shared_hcd &&  in resume_common()
489 			 HCD_RH_RUNNING(hcd->shared_hcd))) {  in resume_common()
496 		dev_err(dev, "can't re-enable after resume, %d!\n", retval);  in resume_common()
502 	if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {  in resume_common()
509 		if (pci_dev->class == CL_EHCI && msg.event != PM_EVENT_AUTO_RESUME)  in resume_common()
513 		retval = hcd->driver->pci_resume(hcd, msg);  in resume_common()
515 			dev_err(dev, "PCI post-resume error %d!\n", retval);  in resume_common()
555 	 * choose the appropriate low-power state, and go to that state.  in hcd_pci_suspend_noirq()
558 	if (retval == -EIO) {		/* Low-power not supported */  in hcd_pci_suspend_noirq()
559 		dev_dbg(dev, "--> PCI D0 legacy\n");  in hcd_pci_suspend_noirq()
562 		dev_dbg(dev, "--> PCI %s\n",  in hcd_pci_suspend_noirq()
563 				pci_power_name(pci_dev->current_state));  in hcd_pci_suspend_noirq()
578 	if (hcd->driver->pci_poweroff_late && !HCD_DEAD(hcd))  in hcd_pci_poweroff_late()
579 		return hcd->driver->pci_poweroff_late(hcd, device_may_wakeup(dev));  in hcd_pci_poweroff_late()