/*
* OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
*
* [ Initialisation is based on Linus' ]
* [ uhci code and gregs ohci fragments ]
* [ (C) Copyright 1999 Linus Torvalds ]
* [ (C) Copyright 1999 Gregory P. Smith]
*
* PCI Bus Glue
*
* This file is licenced under the GPL.
*/
#ifndef CONFIG_PCI
#error "This file is PCI bus glue. CONFIG_PCI must be defined."
#endif
/*-------------------------------------------------------------------------*/
static int
ohci_pci_reset (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
ohci_hcd_init (ohci);
return ohci_init (ohci);
}
static int __devinit
ohci_pci_start (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
int ret;
/* REVISIT this whole block should move to reset(), which handles
* all the other one-time init.
*/
if (hcd->self.controller) {
struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
/* AMD 756, for most chips (early revs), corrupts register
* values on read ... so enable the vendor workaround.
*/
if (pdev->vendor == PCI_VENDOR_ID_AMD
&& pdev->device == 0x740c) {
ohci->flags = OHCI_QUIRK_AMD756;
ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
/* also erratum 10 (suspend/resume issues) */
device_init_wakeup(&hcd->self.root_hub->dev, 0);
}
/* FIXME for some of the early AMD 760 southbridges, OHCI
* won't work at all. blacklist them.
*/
/* Apple's OHCI driver has a lot of bizarre workarounds
* for this chip. Evidently control and bulk lists
* can get confused. (B&W G3 models, and ...)
*/
else if (pdev->vendor == PCI_VENDOR_ID_OPTI
&& pdev->device == 0xc861) {
ohci_dbg (ohci,
"WARNING: OPTi workarounds unavailable\n");
}
/* Check for NSC87560. We have to look at the bridge (fn1) to
* identify the USB (fn2). This quirk might apply to more or
* even all NSC stuff.
*/
else if (pdev->vendor == PCI_VENDOR_ID_NS) {
struct pci_dev *b;
b = pci_get_slot (pdev->bus,
PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
&& b->vendor == PCI_VENDOR_ID_NS) {
ohci->flags |= OHCI_QUIRK_SUPERIO;
ohci_dbg (ohci, "Using NSC SuperIO setup\n");
}
pci_dev_put(b);
}
/* Check for Compaq's ZFMicro chipset, which needs short
* delays before control or bulk queues get re-activated
* in finish_unlinks()
*/
else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
&& pdev->device == 0xa0f8) {
ohci->flags |= OHCI_QUIRK_ZFMICRO;
ohci_dbg (ohci,
"enabled Compaq ZFMicro chipset quirk\n");
}
/* RWC may not be set for add-in PCI cards, since boot
* firmware probably ignored them. This transfers PCI
* PM wakeup capabilities (once the PCI layer is fixed).
*/
if (device_may_wakeup(&pdev->dev))
ohci->hc_control |= OHCI_CTRL_RWC;
}
/* NOTE: there may have already been a first reset, to
* keep bios/smm irqs from making trouble
*/
if ((ret = ohci_run (ohci)) < 0) {
ohci_err (ohci, "can't start\n");
ohci_stop (hcd);
return ret;
}
return 0;
}
#ifdef CONFIG_PM
static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
{
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
unsigned long flags;
int rc = 0;
/* Root hub was already suspended. Disable irq emission and
* mark HW unaccessible, bail out if RH has been resumed. Use
* the spinlock to properly synchronize with possible pending
* RH suspend or resume activity.
*
* This is still racy as hcd->state is manipulated outside of
* any locks =P But that will be a different fix.
*/
spin_lock_irqsave (&ohci->lock, flags);
if (hcd->state != HC_STATE_SUSPENDED) {
rc = -EINVAL;
goto bail;
}
ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
(void)ohci_readl(ohci, &ohci->regs->intrdisable);
/* make sure snapshot being resumed re-enumerates everything */
if (message.event == PM_EVENT_PRETHAW)
ohci_usb_reset(ohci);
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
bail:
spin_unlock_irqrestore (&ohci->lock, flags);
return rc;
}
static int ohci_pci_resume (struct usb_hcd *hcd)
{
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
usb_hcd_resume_root_hub(hcd);
return 0;
}
#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
static const struct hc_driver ohci_pci_hc_driver = {
.description = hcd_name,
.product_desc = "OHCI Host Controller",
.hcd_priv_size = sizeof(struct ohci_hcd),
/*
* generic hardware linkage
*/
.irq = ohci_irq,
.flags = HCD_MEMORY | HCD_USB11,
/*
* basic lifecycle operations
*/
.reset = ohci_pci_reset,
.start = ohci_pci_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
#ifdef CONFIG_PM
/* these suspend/resume entries are for upstream PCI glue ONLY */
.suspend = ohci_pci_suspend,
.resume = ohci_pci_resume,
#endif
/*
* managing i/o requests and associated device resources
*/
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ohci_get_frame,
/*
* root hub support
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
.hub_irq_enable = ohci_rhsc_enable,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
/*-------------------------------------------------------------------------*/
static const struct pci_device_id pci_ids [] = { {
/* handle any USB OHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
.driver_data = (unsigned long) &ohci_pci_hc_driver,
}, { /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE (pci, pci_ids);
/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver ohci_pci_driver = {
.name = (char *) hcd_name,
.id_table = pci_ids,
.probe = usb_hcd_pci_probe,
.remove = usb_hcd_pci_remove,
#ifdef CONFIG_PM
.suspend = usb_hcd_pci_suspend,
.resume = usb_hcd_pci_resume,
#endif
.shutdown = usb_hcd_pci_shutdown,
};
static int __init ohci_hcd_pci_init (void)
{
printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
if (usb_disabled())
return -ENODEV;
pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
sizeof (struct ed), sizeof (struct td));
return pci_register_driver (&ohci_pci_driver);
}
module_init (ohci_hcd_pci_init);
/*-------------------------------------------------------------------------*/
static void __exit ohci_hcd_pci_cleanup (void)
{
pci_unregister_driver (&ohci_pci_driver);
}
module_exit (ohci_hcd_pci_cleanup);
