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 if(hcd->self.controller && hcd->self.controller->bus == &pci_bus_type) {
39 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
41 /* AMD 756, for most chips (early revs), corrupts register
42 * values on read ... so enable the vendor workaround.
44 if (pdev->vendor == PCI_VENDOR_ID_AMD
45 && pdev->device == 0x740c) {
46 ohci->flags = OHCI_QUIRK_AMD756;
47 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
48 // also somewhat erratum 10 (suspend/resume issues)
51 /* FIXME for some of the early AMD 760 southbridges, OHCI
52 * won't work at all. blacklist them.
55 /* Apple's OHCI driver has a lot of bizarre workarounds
56 * for this chip. Evidently control and bulk lists
57 * can get confused. (B&W G3 models, and ...)
59 else if (pdev->vendor == PCI_VENDOR_ID_OPTI
60 && pdev->device == 0xc861) {
62 "WARNING: OPTi workarounds unavailable\n");
65 /* Check for NSC87560. We have to look at the bridge (fn1) to
66 * identify the USB (fn2). This quirk might apply to more or
69 else if (pdev->vendor == PCI_VENDOR_ID_NS) {
72 b = pci_find_slot (pdev->bus->number,
73 PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
74 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
75 && b->vendor == PCI_VENDOR_ID_NS) {
76 ohci->flags |= OHCI_QUIRK_SUPERIO;
77 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
81 /* Check for Compaq's ZFMicro chipset, which needs short
82 * delays before control or bulk queues get re-activated
85 else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
86 && pdev->device == 0xa0f8) {
87 ohci->flags |= OHCI_QUIRK_ZFMICRO;
89 "enabled Compaq ZFMicro chipset quirk\n");
93 /* NOTE: there may have already been a first reset, to
94 * keep bios/smm irqs from making trouble
96 if ((ret = ohci_run (ohci)) < 0) {
97 ohci_err (ohci, "can't start\n");
106 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
108 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
112 /* Root hub was already suspended. Disable irq emission and
113 * mark HW unaccessible, bail out if RH has been resumed. Use
114 * the spinlock to properly synchronize with possible pending
115 * RH suspend or resume activity.
117 * This is still racy as hcd->state is manipulated outside of
118 * any locks =P But that will be a different fix.
120 spin_lock_irqsave (&ohci->lock, flags);
121 if (hcd->state != HC_STATE_SUSPENDED) {
125 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
126 (void)ohci_readl(ohci, &ohci->regs->intrdisable);
127 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
129 spin_unlock_irqrestore (&ohci->lock, flags);
135 static int ohci_pci_resume (struct usb_hcd *hcd)
137 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
138 usb_hcd_resume_root_hub(hcd);
142 #endif /* CONFIG_PM */
145 /*-------------------------------------------------------------------------*/
147 static const struct hc_driver ohci_pci_hc_driver = {
148 .description = hcd_name,
149 .product_desc = "OHCI Host Controller",
150 .hcd_priv_size = sizeof(struct ohci_hcd),
153 * generic hardware linkage
156 .flags = HCD_MEMORY | HCD_USB11,
159 * basic lifecycle operations
161 .reset = ohci_pci_reset,
162 .start = ohci_pci_start,
164 .suspend = ohci_pci_suspend,
165 .resume = ohci_pci_resume,
170 * managing i/o requests and associated device resources
172 .urb_enqueue = ohci_urb_enqueue,
173 .urb_dequeue = ohci_urb_dequeue,
174 .endpoint_disable = ohci_endpoint_disable,
179 .get_frame_number = ohci_get_frame,
184 .hub_status_data = ohci_hub_status_data,
185 .hub_control = ohci_hub_control,
187 .bus_suspend = ohci_bus_suspend,
188 .bus_resume = ohci_bus_resume,
190 .start_port_reset = ohci_start_port_reset,
193 /*-------------------------------------------------------------------------*/
196 static const struct pci_device_id pci_ids [] = { {
197 /* handle any USB OHCI controller */
198 PCI_DEVICE_CLASS((PCI_CLASS_SERIAL_USB << 8) | 0x10, ~0),
199 .driver_data = (unsigned long) &ohci_pci_hc_driver,
200 }, { /* end: all zeroes */ }
202 MODULE_DEVICE_TABLE (pci, pci_ids);
204 /* pci driver glue; this is a "new style" PCI driver module */
205 static struct pci_driver ohci_pci_driver = {
206 .name = (char *) hcd_name,
209 .probe = usb_hcd_pci_probe,
210 .remove = usb_hcd_pci_remove,
213 .suspend = usb_hcd_pci_suspend,
214 .resume = usb_hcd_pci_resume,
219 static int __init ohci_hcd_pci_init (void)
221 printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
225 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
226 sizeof (struct ed), sizeof (struct td));
227 return pci_register_driver (&ohci_pci_driver);
229 module_init (ohci_hcd_pci_init);
231 /*-------------------------------------------------------------------------*/
233 static void __exit ohci_hcd_pci_cleanup (void)
235 pci_unregister_driver (&ohci_pci_driver);
237 module_exit (ohci_hcd_pci_cleanup);