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.
17 #ifdef CONFIG_PMAC_PBOOK
18 #include <asm/machdep.h>
19 #include <asm/pmac_feature.h>
20 #include <asm/pci-bridge.h>
28 #error "This file is PCI bus glue. CONFIG_PCI must be defined."
31 /*-------------------------------------------------------------------------*/
34 ohci_pci_reset (struct usb_hcd *hcd)
36 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
39 return ohci_init (ohci);
43 ohci_pci_start (struct usb_hcd *hcd)
45 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
48 if(hcd->self.controller && hcd->self.controller->bus == &pci_bus_type) {
49 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
51 /* AMD 756, for most chips (early revs), corrupts register
52 * values on read ... so enable the vendor workaround.
54 if (pdev->vendor == PCI_VENDOR_ID_AMD
55 && pdev->device == 0x740c) {
56 ohci->flags = OHCI_QUIRK_AMD756;
57 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
58 // also somewhat erratum 10 (suspend/resume issues)
61 /* FIXME for some of the early AMD 760 southbridges, OHCI
62 * won't work at all. blacklist them.
65 /* Apple's OHCI driver has a lot of bizarre workarounds
66 * for this chip. Evidently control and bulk lists
67 * can get confused. (B&W G3 models, and ...)
69 else if (pdev->vendor == PCI_VENDOR_ID_OPTI
70 && pdev->device == 0xc861) {
72 "WARNING: OPTi workarounds unavailable\n");
75 /* Check for NSC87560. We have to look at the bridge (fn1) to
76 * identify the USB (fn2). This quirk might apply to more or
79 else if (pdev->vendor == PCI_VENDOR_ID_NS) {
82 b = pci_find_slot (pdev->bus->number,
83 PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
84 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
85 && b->vendor == PCI_VENDOR_ID_NS) {
86 ohci->flags |= OHCI_QUIRK_SUPERIO;
87 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
91 /* Check for Compaq's ZFMicro chipset, which needs short
92 * delays before control or bulk queues get re-activated
95 else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
96 && pdev->device == 0xa0f8) {
97 ohci->flags |= OHCI_QUIRK_ZFMICRO;
99 "enabled Compaq ZFMicro chipset quirk\n");
103 /* NOTE: there may have already been a first reset, to
104 * keep bios/smm irqs from making trouble
106 if ((ret = ohci_run (ohci)) < 0) {
107 ohci_err (ohci, "can't start\n");
116 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
118 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
120 /* suspend root hub, hoping it keeps power during suspend */
121 if (time_before (jiffies, ohci->next_statechange))
124 #ifdef CONFIG_USB_SUSPEND
125 (void) usb_suspend_device (hcd->self.root_hub, message);
127 usb_lock_device (hcd->self.root_hub);
128 (void) ohci_hub_suspend (hcd);
129 usb_unlock_device (hcd->self.root_hub);
132 /* let things settle down a bit */
135 #ifdef CONFIG_PMAC_PBOOK
136 if (_machine == _MACH_Pmac) {
137 struct device_node *of_node;
139 /* Disable USB PAD & cell clock */
140 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
142 pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
144 #endif /* CONFIG_PMAC_PBOOK */
149 static int ohci_pci_resume (struct usb_hcd *hcd)
151 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
154 #ifdef CONFIG_PMAC_PBOOK
155 if (_machine == _MACH_Pmac) {
156 struct device_node *of_node;
158 /* Re-enable USB PAD & cell clock */
159 of_node = pci_device_to_OF_node (to_pci_dev(hcd->self.controller));
161 pmac_call_feature (PMAC_FTR_USB_ENABLE, of_node, 0, 1);
163 #endif /* CONFIG_PMAC_PBOOK */
165 /* resume root hub */
166 if (time_before (jiffies, ohci->next_statechange))
168 #ifdef CONFIG_USB_SUSPEND
169 /* get extra cleanup even if remote wakeup isn't in use */
170 retval = usb_resume_device (hcd->self.root_hub);
172 usb_lock_device (hcd->self.root_hub);
173 retval = ohci_hub_resume (hcd);
174 usb_unlock_device (hcd->self.root_hub);
180 #endif /* CONFIG_PM */
183 /*-------------------------------------------------------------------------*/
185 static const struct hc_driver ohci_pci_hc_driver = {
186 .description = hcd_name,
187 .product_desc = "OHCI Host Controller",
188 .hcd_priv_size = sizeof(struct ohci_hcd),
191 * generic hardware linkage
194 .flags = HCD_MEMORY | HCD_USB11,
197 * basic lifecycle operations
199 .reset = ohci_pci_reset,
200 .start = ohci_pci_start,
202 .suspend = ohci_pci_suspend,
203 .resume = ohci_pci_resume,
208 * managing i/o requests and associated device resources
210 .urb_enqueue = ohci_urb_enqueue,
211 .urb_dequeue = ohci_urb_dequeue,
212 .endpoint_disable = ohci_endpoint_disable,
217 .get_frame_number = ohci_get_frame,
222 .hub_status_data = ohci_hub_status_data,
223 .hub_control = ohci_hub_control,
224 #ifdef CONFIG_USB_SUSPEND
225 .hub_suspend = ohci_hub_suspend,
226 .hub_resume = ohci_hub_resume,
228 .start_port_reset = ohci_start_port_reset,
231 /*-------------------------------------------------------------------------*/
234 static const struct pci_device_id pci_ids [] = { {
235 /* handle any USB OHCI controller */
236 PCI_DEVICE_CLASS((PCI_CLASS_SERIAL_USB << 8) | 0x10, ~0),
237 .driver_data = (unsigned long) &ohci_pci_hc_driver,
238 }, { /* end: all zeroes */ }
240 MODULE_DEVICE_TABLE (pci, pci_ids);
242 /* pci driver glue; this is a "new style" PCI driver module */
243 static struct pci_driver ohci_pci_driver = {
244 .name = (char *) hcd_name,
247 .probe = usb_hcd_pci_probe,
248 .remove = usb_hcd_pci_remove,
251 .suspend = usb_hcd_pci_suspend,
252 .resume = usb_hcd_pci_resume,
257 static int __init ohci_hcd_pci_init (void)
259 printk (KERN_DEBUG "%s: " DRIVER_INFO " (PCI)\n", hcd_name);
263 pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
264 sizeof (struct ed), sizeof (struct td));
265 return pci_register_driver (&ohci_pci_driver);
267 module_init (ohci_hcd_pci_init);
269 /*-------------------------------------------------------------------------*/
271 static void __exit ohci_hcd_pci_cleanup (void)
273 pci_unregister_driver (&ohci_pci_driver);
275 module_exit (ohci_hcd_pci_cleanup);