Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/*
 * UHCI HCD (Host Controller Driver) PCI Bus Glue.
 *
 * Extracted from uhci-hcd.c:
 * Maintainer: Alan Stern <stern@rowland.harvard.edu>
 *
 * (C) Copyright 1999 Linus Torvalds
 * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
 * (C) Copyright 1999 Randy Dunlap
 * (C) Copyright 1999 Georg Acher, acher@in.tum.de
 * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
 * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
 * (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at
 * (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
 *               support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
 * (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
 * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
 */
 
#include "pci-quirks.h"
 
/*
 * Make sure the controller is completely inactive, unable to
 * generate interrupts or do DMA.
 */
static void uhci_pci_reset_hc(struct uhci_hcd *uhci)
{
<------>uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
}
 
/*
 * Initialize a controller that was newly discovered or has just been
 * resumed.  In either case we can't be sure of its previous state.
 *
 * Returns: 1 if the controller was reset, 0 otherwise.
 */
static int uhci_pci_check_and_reset_hc(struct uhci_hcd *uhci)
{
<------>return uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)),
<------><------><------><------>uhci->io_addr);
}
 
/*
 * Store the basic register settings needed by the controller.
 * This function is called at the end of configure_hc in uhci-hcd.c.
 */
static void uhci_pci_configure_hc(struct uhci_hcd *uhci)
{
<------>struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
 
<------>/* Enable PIRQ */
<------>pci_write_config_word(pdev, USBLEGSUP, USBLEGSUP_DEFAULT);
 
<------>/* Disable platform-specific non-PME# wakeup */
<------>if (pdev->vendor == PCI_VENDOR_ID_INTEL)
<------><------>pci_write_config_byte(pdev, USBRES_INTEL, 0);
}
 
static int uhci_pci_resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
{
<------>int port;
 
<------>switch (to_pci_dev(uhci_dev(uhci))->vendor) {
<------>default:
<------><------>break;
 
<------>case PCI_VENDOR_ID_GENESYS:
<------><------>/* Genesys Logic's GL880S controllers don't generate
<------><------> * resume-detect interrupts.
<------><------> */
<------><------>return 1;
 
<------>case PCI_VENDOR_ID_INTEL:
<------><------>/* Some of Intel's USB controllers have a bug that causes
<------><------> * resume-detect interrupts if any port has an over-current
<------><------> * condition.  To make matters worse, some motherboards
<------><------> * hardwire unused USB ports' over-current inputs active!
<------><------> * To prevent problems, we will not enable resume-detect
<------><------> * interrupts if any ports are OC.
<------><------> */
<------><------>for (port = 0; port < uhci->rh_numports; ++port) {
<------><------><------>if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
<------><------><------><------><------>USBPORTSC_OC)
<------><------><------><------>return 1;
<------><------>}
<------><------>break;
<------>}
<------>return 0;
}
 
static int uhci_pci_global_suspend_mode_is_broken(struct uhci_hcd *uhci)
{
<------>int port;
<------>const char *sys_info;
<------>static const char bad_Asus_board[] = "A7V8X";
 
<------>/* One of Asus's motherboards has a bug which causes it to
<------> * wake up immediately from suspend-to-RAM if any of the ports
<------> * are connected.  In such cases we will not set EGSM.
<------> */
<------>sys_info = dmi_get_system_info(DMI_BOARD_NAME);
<------>if (sys_info && !strcmp(sys_info, bad_Asus_board)) {
<------><------>for (port = 0; port < uhci->rh_numports; ++port) {
<------><------><------>if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
<------><------><------><------><------>USBPORTSC_CCS)
<------><------><------><------>return 1;
<------><------>}
<------>}
 
<------>return 0;
}
 
static int uhci_pci_init(struct usb_hcd *hcd)
{
<------>struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 
<------>uhci->io_addr = (unsigned long) hcd->rsrc_start;
 
<------>uhci->rh_numports = uhci_count_ports(hcd);
 
<------>/* Intel controllers report the OverCurrent bit active on.
<------> * VIA controllers report it active off, so we'll adjust the
<------> * bit value.  (It's not standardized in the UHCI spec.)
<------> */
<------>if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA)
<------><------>uhci->oc_low = 1;
 
<------>/* HP's server management chip requires a longer port reset delay. */
<------>if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_HP)
<------><------>uhci->wait_for_hp = 1;
 
<------>/* Intel controllers use non-PME wakeup signalling */
<------>if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_INTEL)
<------><------>device_set_wakeup_capable(uhci_dev(uhci), true);
 
<------>/* Set up pointers to PCI-specific functions */
<------>uhci->reset_hc = uhci_pci_reset_hc;
<------>uhci->check_and_reset_hc = uhci_pci_check_and_reset_hc;
<------>uhci->configure_hc = uhci_pci_configure_hc;
<------>uhci->resume_detect_interrupts_are_broken =
<------><------>uhci_pci_resume_detect_interrupts_are_broken;
<------>uhci->global_suspend_mode_is_broken =
<------><------>uhci_pci_global_suspend_mode_is_broken;
 
 
<------>/* Kick BIOS off this hardware and reset if the controller
<------> * isn't already safely quiescent.
<------> */
<------>check_and_reset_hc(uhci);
<------>return 0;
}
 
/* Make sure the controller is quiescent and that we're not using it
 * any more.  This is mainly for the benefit of programs which, like kexec,
 * expect the hardware to be idle: not doing DMA or generating IRQs.
 *
 * This routine may be called in a damaged or failing kernel.  Hence we
 * do not acquire the spinlock before shutting down the controller.
 */
static void uhci_shutdown(struct pci_dev *pdev)
{
<------>struct usb_hcd *hcd = pci_get_drvdata(pdev);
 
<------>uhci_hc_died(hcd_to_uhci(hcd));
}
 
#ifdef CONFIG_PM
 
static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated);
 
static int uhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
<------>struct uhci_hcd *uhci = hcd_to_uhci(hcd);
<------>struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
<------>int rc = 0;
 
<------>dev_dbg(uhci_dev(uhci), "%s\n", __func__);
 
<------>spin_lock_irq(&uhci->lock);
<------>if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
<------><------>goto done_okay;		/* Already suspended or dead */
 
<------>/* All PCI host controllers are required to disable IRQ generation
<------> * at the source, so we must turn off PIRQ.
<------> */
<------>pci_write_config_word(pdev, USBLEGSUP, 0);
<------>clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 
<------>/* Enable platform-specific non-PME# wakeup */
<------>if (do_wakeup) {
<------><------>if (pdev->vendor == PCI_VENDOR_ID_INTEL)
<------><------><------>pci_write_config_byte(pdev, USBRES_INTEL,
<------><------><------><------><------>USBPORT1EN | USBPORT2EN);
<------>}
 
done_okay:
<------>clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
<------>spin_unlock_irq(&uhci->lock);
 
<------>synchronize_irq(hcd->irq);
 
<------>/* Check for race with a wakeup request */
<------>if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
<------><------>uhci_pci_resume(hcd, false);
<------><------>rc = -EBUSY;
<------>}
<------>return rc;
}
 
static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
{
<------>struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 
<------>dev_dbg(uhci_dev(uhci), "%s\n", __func__);
 
<------>/* Since we aren't in D3 any more, it's safe to set this flag
<------> * even if the controller was dead.
<------> */
<------>set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 
<------>spin_lock_irq(&uhci->lock);
 
<------>/* Make sure resume from hibernation re-enumerates everything */
<------>if (hibernated) {
<------><------>uhci->reset_hc(uhci);
<------><------>finish_reset(uhci);
<------>}
 
<------>/* The firmware may have changed the controller settings during
<------> * a system wakeup.  Check it and reconfigure to avoid problems.
<------> */
<------>else {
<------><------>check_and_reset_hc(uhci);
<------>}
<------>configure_hc(uhci);
 
<------>/* Tell the core if the controller had to be reset */
<------>if (uhci->rh_state == UHCI_RH_RESET)
<------><------>usb_root_hub_lost_power(hcd->self.root_hub);
 
<------>spin_unlock_irq(&uhci->lock);
 
<------>/* If interrupts don't work and remote wakeup is enabled then
<------> * the suspended root hub needs to be polled.
<------> */
<------>if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup)
<------><------>set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
 
<------>/* Does the root hub have a port wakeup pending? */
<------>usb_hcd_poll_rh_status(hcd);
<------>return 0;
}
 
#endif
 
static const struct hc_driver uhci_driver = {
<------>.description =		hcd_name,
<------>.product_desc =		"UHCI Host Controller",
<------>.hcd_priv_size =	sizeof(struct uhci_hcd),
 
<------>/* Generic hardware linkage */
<------>.irq =			uhci_irq,
<------>.flags =		HCD_DMA | HCD_USB11,
 
<------>/* Basic lifecycle operations */
<------>.reset =		uhci_pci_init,
<------>.start =		uhci_start,
#ifdef CONFIG_PM
<------>.pci_suspend =		uhci_pci_suspend,
<------>.pci_resume =		uhci_pci_resume,
<------>.bus_suspend =		uhci_rh_suspend,
<------>.bus_resume =		uhci_rh_resume,
#endif
<------>.stop =			uhci_stop,
 
<------>.urb_enqueue =		uhci_urb_enqueue,
<------>.urb_dequeue =		uhci_urb_dequeue,
 
<------>.endpoint_disable =	uhci_hcd_endpoint_disable,
<------>.get_frame_number =	uhci_hcd_get_frame_number,
 
<------>.hub_status_data =	uhci_hub_status_data,
<------>.hub_control =		uhci_hub_control,
};
 
static const struct pci_device_id uhci_pci_ids[] = { {
<------>/* handle any USB UHCI controller */
<------>PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
<------>}, { /* end: all zeroes */ }
};
 
MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
 
static int uhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
<------>return usb_hcd_pci_probe(dev, id, &uhci_driver);
}
 
static struct pci_driver uhci_pci_driver = {
<------>.name =		hcd_name,
<------>.id_table =	uhci_pci_ids,
 
<------>.probe =	uhci_pci_probe,
<------>.remove =	usb_hcd_pci_remove,
<------>.shutdown =	uhci_shutdown,
 
#ifdef CONFIG_PM
<------>.driver =	{
<------><------>.pm =	&usb_hcd_pci_pm_ops
<------>},
#endif
};
 
MODULE_SOFTDEP("pre: ehci_pci");