mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 13:43:55 +08:00
c31a65f869
This patch is part of a series that extend the UHCI HCD to support non-PCI controllers. This patch moves PCI specific functions to uhci-pci.c and includes this file in uhci-hcd.c. It also renames the function uhci_init to uhci_pci_init. uhci_init/uhci_pci_init is modified so that the port-detection logic is kept in a new separate function uhci_count_ports() in uhci-hcd.c. Signed-off-by: Jan Andersson <jan@gaisler.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
302 lines
8.2 KiB
C
302 lines
8.2 KiB
C
/*
|
|
* 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
|
|
};
|