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_find_slot (pdev->bus->number,
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");
85 /* Check for Compaq's ZFMicro chipset, which needs short
86 * delays before control or bulk queues get re-activated
89 else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
90 && pdev->device == 0xa0f8) {
91 ohci->flags |= OHCI_QUIRK_ZFMICRO;
93 "enabled Compaq ZFMicro chipset quirk\n");
96 /* RWC may not be set for add-in PCI cards, since boot
97 * firmware probably ignored them. This transfers PCI
98 * PM wakeup capabilities (once the PCI layer is fixed).
100 if (device_may_wakeup(&pdev->dev))
101 ohci->hc_control |= OHCI_CTRL_RWC;
104 /* NOTE: there may have already been a first reset, to
105 * keep bios/smm irqs from making trouble
107 if ((ret = ohci_run (ohci)) < 0) {
108 ohci_err (ohci, "can't start\n");
117 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
119 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
123 /* Root hub was already suspended. Disable irq emission and
124 * mark HW unaccessible, bail out if RH has been resumed. Use
125 * the spinlock to properly synchronize with possible pending
126 * RH suspend or resume activity.
128 * This is still racy as hcd->state is manipulated outside of
129 * any locks =P But that will be a different fix.
131 spin_lock_irqsave (&ohci->lock, flags);
132 if (hcd->state != HC_STATE_SUSPENDED) {
136 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
137 (void)ohci_readl(ohci, &ohci->regs->intrdisable);
139 /* make sure snapshot being resumed re-enumerates everything */
140 if (message.event == PM_EVENT_PRETHAW)
141 ohci_usb_reset(ohci);
143 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
145 spin_unlock_irqrestore (&ohci->lock, flags);
151 static int ohci_pci_resume (struct usb_hcd *hcd)
153 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
154 usb_hcd_resume_root_hub(hcd);
158 #endif /* CONFIG_PM */
161 /*-------------------------------------------------------------------------*/
163 static const struct hc_driver ohci_pci_hc_driver = {
164 .description = hcd_name,
165 .product_desc = "OHCI Host Controller",
166 .hcd_priv_size = sizeof(struct ohci_hcd),
169 * generic hardware linkage
172 .flags = HCD_MEMORY | HCD_USB11,
175 * basic lifecycle operations
177 .reset = ohci_pci_reset,
178 .start = ohci_pci_start,
182 /* these suspend/resume entries are for upstream PCI glue ONLY */
183 .suspend = ohci_pci_suspend,
184 .resume = ohci_pci_resume,
188 * managing i/o requests and associated device resources
190 .urb_enqueue = ohci_urb_enqueue,
191 .urb_dequeue = ohci_urb_dequeue,
192 .endpoint_disable = ohci_endpoint_disable,
197 .get_frame_number = ohci_get_frame,
202 .hub_status_data = ohci_hub_status_data,
203 .hub_control = ohci_hub_control,
204 .hub_irq_enable = ohci_rhsc_enable,
206 .bus_suspend = ohci_bus_suspend,
207 .bus_resume = ohci_bus_resume,
209 .start_port_reset = ohci_start_port_reset,
212 /*-------------------------------------------------------------------------*/
215 static const struct pci_device_id pci_ids [] = { {
216 /* handle any USB OHCI controller */
217 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
218 .driver_data = (unsigned long) &ohci_pci_hc_driver,
219 }, { /* end: all zeroes */ }
221 MODULE_DEVICE_TABLE (pci, pci_ids);
223 /* pci driver glue; this is a "new style" PCI driver module */
224 static struct pci_driver ohci_pci_driver = {
225 .name = (char *) hcd_name,
228 .probe = usb_hcd_pci_probe,
229 .remove = usb_hcd_pci_remove,
232 .suspend = usb_hcd_pci_suspend,
233 .resume = usb_hcd_pci_resume,
238 static int __init ohci_hcd_pci_init (void)
240 printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
244 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
245 sizeof (struct ed), sizeof (struct td));
246 return pci_register_driver (&ohci_pci_driver);
248 module_init (ohci_hcd_pci_init);
250 /*-------------------------------------------------------------------------*/
252 static void __exit ohci_hcd_pci_cleanup (void)
254 pci_unregister_driver (&ohci_pci_driver);
256 module_exit (ohci_hcd_pci_cleanup);