1 // SPDX-License-Identifier: GPL-2.0
3  * UHCI HCD (Host Controller Driver) PCI Bus Glue.
5  * Extracted from uhci-hcd.c:
9  * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
16  *               support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
17  * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
18  * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
21 #include "pci-quirks.h"
27 static void uhci_pci_reset_hc(struct uhci_hcd *uhci)  in uhci_pci_reset_hc()  argument
29 	uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);  in uhci_pci_reset_hc()
38 static int uhci_pci_check_and_reset_hc(struct uhci_hcd *uhci)  in uhci_pci_check_and_reset_hc()  argument
40 	return uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)),  in uhci_pci_check_and_reset_hc()
41 				uhci->io_addr);  in uhci_pci_check_and_reset_hc()
46  * This function is called at the end of configure_hc in uhci-hcd.c.
48 static void uhci_pci_configure_hc(struct uhci_hcd *uhci)  in uhci_pci_configure_hc()  argument
50 	struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));  in uhci_pci_configure_hc()
55 	/* Disable platform-specific non-PME# wakeup */  in uhci_pci_configure_hc()
56 	if (pdev->vendor == PCI_VENDOR_ID_INTEL)  in uhci_pci_configure_hc()
60 static int uhci_pci_resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)  in uhci_pci_resume_detect_interrupts_are_broken()  argument
64 	switch (to_pci_dev(uhci_dev(uhci))->vendor) {  in uhci_pci_resume_detect_interrupts_are_broken()
70 		 * resume-detect interrupts.  in uhci_pci_resume_detect_interrupts_are_broken()
76 		 * resume-detect interrupts if any port has an over-current  in uhci_pci_resume_detect_interrupts_are_broken()
78 		 * hardwire unused USB ports' over-current inputs active!  in uhci_pci_resume_detect_interrupts_are_broken()
79 		 * To prevent problems, we will not enable resume-detect  in uhci_pci_resume_detect_interrupts_are_broken()
82 		for (port = 0; port < uhci->rh_numports; ++port) {  in uhci_pci_resume_detect_interrupts_are_broken()
83 			if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &  in uhci_pci_resume_detect_interrupts_are_broken()
92 static int uhci_pci_global_suspend_mode_is_broken(struct uhci_hcd *uhci)  in uhci_pci_global_suspend_mode_is_broken()  argument
99 	 * wake up immediately from suspend-to-RAM if any of the ports  in uhci_pci_global_suspend_mode_is_broken()
104 		for (port = 0; port < uhci->rh_numports; ++port) {  in uhci_pci_global_suspend_mode_is_broken()
105 			if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &  in uhci_pci_global_suspend_mode_is_broken()
116 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);  in uhci_pci_init()  local
118 	uhci->io_addr = (unsigned long) hcd->rsrc_start;  in uhci_pci_init()
120 	uhci->rh_numports = uhci_count_ports(hcd);  in uhci_pci_init()
125 	 * the bit value.  (It's not standardized in the UHCI spec.)  in uhci_pci_init()
127 	if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA ||  in uhci_pci_init()
128 			to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_ZHAOXIN)  in uhci_pci_init()
129 		uhci->oc_low = 1;  in uhci_pci_init()
132 	if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_HP)  in uhci_pci_init()
133 		uhci->wait_for_hp = 1;  in uhci_pci_init()
135 	/* Intel controllers use non-PME wakeup signalling */  in uhci_pci_init()
136 	if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_INTEL)  in uhci_pci_init()
137 		device_set_wakeup_capable(uhci_dev(uhci), true);  in uhci_pci_init()
139 	/* Set up pointers to PCI-specific functions */  in uhci_pci_init()
140 	uhci->reset_hc = uhci_pci_reset_hc;  in uhci_pci_init()
141 	uhci->check_and_reset_hc = uhci_pci_check_and_reset_hc;  in uhci_pci_init()
142 	uhci->configure_hc = uhci_pci_configure_hc;  in uhci_pci_init()
143 	uhci->resume_detect_interrupts_are_broken =  in uhci_pci_init()
145 	uhci->global_suspend_mode_is_broken =  in uhci_pci_init()
152 	check_and_reset_hc(uhci);  in uhci_pci_init()
176 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);  in uhci_pci_suspend()  local
177 	struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));  in uhci_pci_suspend()
180 	dev_dbg(uhci_dev(uhci), "%s\n", __func__);  in uhci_pci_suspend()
182 	spin_lock_irq(&uhci->lock);  in uhci_pci_suspend()
183 	if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)  in uhci_pci_suspend()
190 	clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);  in uhci_pci_suspend()
192 	/* Enable platform-specific non-PME# wakeup */  in uhci_pci_suspend()
194 		if (pdev->vendor == PCI_VENDOR_ID_INTEL)  in uhci_pci_suspend()
200 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);  in uhci_pci_suspend()
201 	spin_unlock_irq(&uhci->lock);  in uhci_pci_suspend()
203 	synchronize_irq(hcd->irq);  in uhci_pci_suspend()
208 		rc = -EBUSY;  in uhci_pci_suspend()
216 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);  in uhci_pci_resume()  local
218 	dev_dbg(uhci_dev(uhci), "%s\n", __func__);  in uhci_pci_resume()
223 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);  in uhci_pci_resume()
225 	spin_lock_irq(&uhci->lock);  in uhci_pci_resume()
227 	/* Make sure resume from hibernation re-enumerates everything */  in uhci_pci_resume()
229 		uhci->reset_hc(uhci);  in uhci_pci_resume()
230 		finish_reset(uhci);  in uhci_pci_resume()
237 		check_and_reset_hc(uhci);  in uhci_pci_resume()
239 	configure_hc(uhci);  in uhci_pci_resume()
242 	if (uhci->rh_state == UHCI_RH_RESET)  in uhci_pci_resume()
243 		usb_root_hub_lost_power(hcd->self.root_hub);  in uhci_pci_resume()
245 	spin_unlock_irq(&uhci->lock);  in uhci_pci_resume()
250 	if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup)  in uhci_pci_resume()
251 		set_bit(HCD_FLAG_POLL_RH, &hcd->flags);  in uhci_pci_resume()
262 	.product_desc =		"UHCI Host Controller",
265 	/* Generic hardware linkage */
291 	/* handle any USB UHCI controller */