1 files changed, 301 insertions, 0 deletions

diff --git a/drivers/usb/host/uhci-pci.c b/drivers/usb/host/uhci-pci.c
new file mode 100644
index 00000000000..c300bd2f7d1
--- /dev/null
+++ b/drivers/usb/host/uhci-pci.c
@@ -0,0 +1,301 @@
+/*
+ * 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;
+
+        /* 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_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 */
+
+        if (uhci->rh_state > UHCI_RH_SUSPENDED) {
+                dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
+                rc = -EBUSY;
+                goto done;
+        };
+
+        /* 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);
+done:
+        spin_unlock_irq(&uhci->lock);
+        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_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 DEFINE_PCI_DEVICE_TABLE(uhci_pci_ids) = { {
+        /* handle any USB UHCI controller */
+        PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
+        .driver_data =  (unsigned long) &uhci_driver,
+        }, { /* end: all zeroes */ }
+};
+
+MODULE_DEVICE_TABLE(pci, uhci_pci_ids);
+
+static struct pci_driver uhci_pci_driver = {
+        .name =         (char *)hcd_name,
+        .id_table =     uhci_pci_ids,
+
+        .probe =        usb_hcd_pci_probe,
+        .remove =       usb_hcd_pci_remove,
+        .shutdown =     uhci_shutdown,
+
+#ifdef CONFIG_PM_SLEEP
+        .driver =       {
+                .pm =   &usb_hcd_pci_pm_ops
+        },
+#endif
+};