2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
7 * [ Initialisation is based on Linus' ]
8 * [ uhci code and gregs ohci fragments ]
9 * [ (C) Copyright 1999 Linus Torvalds ]
10 * [ (C) Copyright 1999 Gregory P. Smith]
14 * This file is licenced under the GPL.
18 #error "This file is PCI bus glue. CONFIG_PCI must be defined."
21 /*-------------------------------------------------------------------------*/
24 ohci_pci_reset (struct usb_hcd *hcd)
26 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
29 return ohci_init (ohci);
33 ohci_pci_start (struct usb_hcd *hcd)
35 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
38 /* REVISIT this whole block should move to reset(), which handles
39 * all the other one-time init.
41 if (hcd->self.controller) {
42 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
44 /* AMD 756, for most chips (early revs), corrupts register
45 * values on read ... so enable the vendor workaround.
47 if (pdev->vendor == PCI_VENDOR_ID_AMD
48 && pdev->device == 0x740c) {
49 ohci->flags = OHCI_QUIRK_AMD756;
50 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
51 /* also erratum 10 (suspend/resume issues) */
52 device_init_wakeup(&hcd->self.root_hub->dev, 0);
55 /* FIXME for some of the early AMD 760 southbridges, OHCI
56 * won't work at all. blacklist them.
59 /* Apple's OHCI driver has a lot of bizarre workarounds
60 * for this chip. Evidently control and bulk lists
61 * can get confused. (B&W G3 models, and ...)
63 else if (pdev->vendor == PCI_VENDOR_ID_OPTI
64 && pdev->device == 0xc861) {
66 "WARNING: OPTi workarounds unavailable\n");
69 /* Check for NSC87560. We have to look at the bridge (fn1) to
70 * identify the USB (fn2). This quirk might apply to more or
73 else if (pdev->vendor == PCI_VENDOR_ID_NS) {
76 b = pci_get_slot (pdev->bus,
77 PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
78 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
79 && b->vendor == PCI_VENDOR_ID_NS) {
80 ohci->flags |= OHCI_QUIRK_SUPERIO;
81 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
86 /* Check for Compaq's ZFMicro chipset, which needs short
87 * delays before control or bulk queues get re-activated
90 else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
91 && pdev->device == 0xa0f8) {
92 ohci->flags |= OHCI_QUIRK_ZFMICRO;
94 "enabled Compaq ZFMicro chipset quirk\n");
97 /* RWC may not be set for add-in PCI cards, since boot
98 * firmware probably ignored them. This transfers PCI
99 * PM wakeup capabilities (once the PCI layer is fixed).
101 if (device_may_wakeup(&pdev->dev))
102 ohci->hc_control |= OHCI_CTRL_RWC;
105 /* NOTE: there may have already been a first reset, to
106 * keep bios/smm irqs from making trouble
108 if ((ret = ohci_run (ohci)) < 0) {
109 ohci_err (ohci, "can't start\n");
118 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
120 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
124 /* Root hub was already suspended. Disable irq emission and
125 * mark HW unaccessible, bail out if RH has been resumed. Use
126 * the spinlock to properly synchronize with possible pending
127 * RH suspend or resume activity.
129 * This is still racy as hcd->state is manipulated outside of
130 * any locks =P But that will be a different fix.
132 spin_lock_irqsave (&ohci->lock, flags);
133 if (hcd->state != HC_STATE_SUSPENDED) {
137 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
138 (void)ohci_readl(ohci, &ohci->regs->intrdisable);
140 /* make sure snapshot being resumed re-enumerates everything */
141 if (message.event == PM_EVENT_PRETHAW)
142 ohci_usb_reset(ohci);
144 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
146 spin_unlock_irqrestore (&ohci->lock, flags);
152 static int ohci_pci_resume (struct usb_hcd *hcd)
154 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
155 usb_hcd_resume_root_hub(hcd);
159 #endif /* CONFIG_PM */
162 /*-------------------------------------------------------------------------*/
164 static const struct hc_driver ohci_pci_hc_driver = {
165 .description = hcd_name,
166 .product_desc = "OHCI Host Controller",
167 .hcd_priv_size = sizeof(struct ohci_hcd),
170 * generic hardware linkage
173 .flags = HCD_MEMORY | HCD_USB11,
176 * basic lifecycle operations
178 .reset = ohci_pci_reset,
179 .start = ohci_pci_start,
181 .shutdown = ohci_shutdown,
184 /* these suspend/resume entries are for upstream PCI glue ONLY */
185 .suspend = ohci_pci_suspend,
186 .resume = ohci_pci_resume,
190 * managing i/o requests and associated device resources
192 .urb_enqueue = ohci_urb_enqueue,
193 .urb_dequeue = ohci_urb_dequeue,
194 .endpoint_disable = ohci_endpoint_disable,
199 .get_frame_number = ohci_get_frame,
204 .hub_status_data = ohci_hub_status_data,
205 .hub_control = ohci_hub_control,
206 .hub_irq_enable = ohci_rhsc_enable,
208 .bus_suspend = ohci_bus_suspend,
209 .bus_resume = ohci_bus_resume,
211 .start_port_reset = ohci_start_port_reset,
214 /*-------------------------------------------------------------------------*/
217 static const struct pci_device_id pci_ids [] = { {
218 /* handle any USB OHCI controller */
219 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
220 .driver_data = (unsigned long) &ohci_pci_hc_driver,
221 }, { /* end: all zeroes */ }
223 MODULE_DEVICE_TABLE (pci, pci_ids);
225 /* pci driver glue; this is a "new style" PCI driver module */
226 static struct pci_driver ohci_pci_driver = {
227 .name = (char *) hcd_name,
230 .probe = usb_hcd_pci_probe,
231 .remove = usb_hcd_pci_remove,
234 .suspend = usb_hcd_pci_suspend,
235 .resume = usb_hcd_pci_resume,
238 .shutdown = usb_hcd_pci_shutdown,
242 static int __init ohci_hcd_pci_init (void)
244 printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
248 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
249 sizeof (struct ed), sizeof (struct td));
250 return pci_register_driver (&ohci_pci_driver);
252 module_init (ohci_hcd_pci_init);
254 /*-------------------------------------------------------------------------*/
256 static void __exit ohci_hcd_pci_cleanup (void)
258 pci_unregister_driver (&ohci_pci_driver);
260 module_exit (ohci_hcd_pci_cleanup);