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 /*-------------------------------------------------------------------------*/
23 static int broken_suspend(struct usb_hcd *hcd)
25 device_init_wakeup(&hcd->self.root_hub->dev, 0);
29 /* AMD 756, for most chips (early revs), corrupts register
30 * values on read ... so enable the vendor workaround.
32 static int ohci_quirk_amd756(struct usb_hcd *hcd)
34 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
36 ohci->flags = OHCI_QUIRK_AMD756;
37 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
39 /* also erratum 10 (suspend/resume issues) */
40 return broken_suspend(hcd);
43 /* Apple's OHCI driver has a lot of bizarre workarounds
44 * for this chip. Evidently control and bulk lists
45 * can get confused. (B&W G3 models, and ...)
47 static int ohci_quirk_opti(struct usb_hcd *hcd)
49 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
51 ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n");
56 /* Check for NSC87560. We have to look at the bridge (fn1) to
57 * identify the USB (fn2). This quirk might apply to more or
60 static int ohci_quirk_ns(struct usb_hcd *hcd)
62 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
65 b = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
66 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
67 && b->vendor == PCI_VENDOR_ID_NS) {
68 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
70 ohci->flags |= OHCI_QUIRK_SUPERIO;
71 ohci_dbg (ohci, "Using NSC SuperIO setup\n");
78 /* Check for Compaq's ZFMicro chipset, which needs short
79 * delays before control or bulk queues get re-activated
82 static int ohci_quirk_zfmicro(struct usb_hcd *hcd)
84 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
86 ohci->flags |= OHCI_QUIRK_ZFMICRO;
87 ohci_dbg (ohci, "enabled Compaq ZFMicro chipset quirk\n");
92 /* Check for Toshiba SCC OHCI which has big endian registers
93 * and little endian in memory data structures
95 static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd)
97 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
99 /* That chip is only present in the southbridge of some
100 * cell based platforms which are supposed to select
101 * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if
102 * that was the case though.
104 #ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
105 ohci->flags |= OHCI_QUIRK_BE_MMIO;
106 ohci_dbg (ohci, "enabled big endian Toshiba quirk\n");
109 ohci_err (ohci, "unsupported big endian Toshiba quirk\n");
114 /* Check for NEC chip and apply quirk for allegedly lost interrupts.
116 static int ohci_quirk_nec(struct usb_hcd *hcd)
118 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
120 ohci->flags |= OHCI_QUIRK_NEC;
121 ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n");
126 /* List of quirks for OHCI */
127 static const struct pci_device_id ohci_pci_quirks[] = {
129 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
130 .driver_data = (unsigned long)ohci_quirk_amd756,
133 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
134 .driver_data = (unsigned long)ohci_quirk_opti,
137 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
138 .driver_data = (unsigned long)ohci_quirk_ns,
141 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
142 .driver_data = (unsigned long)ohci_quirk_zfmicro,
145 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
146 .driver_data = (unsigned long)ohci_quirk_toshiba_scc,
149 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
150 .driver_data = (unsigned long)ohci_quirk_nec,
153 /* Toshiba portege 4000 */
154 .vendor = PCI_VENDOR_ID_AL,
156 .subvendor = PCI_VENDOR_ID_TOSHIBA,
158 .driver_data = (unsigned long) broken_suspend,
161 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
162 .driver_data = (unsigned long) broken_suspend,
164 /* FIXME for some of the early AMD 760 southbridges, OHCI
165 * won't work at all. blacklist them.
171 static int ohci_pci_reset (struct usb_hcd *hcd)
173 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
176 if (hcd->self.controller) {
177 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
178 const struct pci_device_id *quirk_id;
180 quirk_id = pci_match_id(ohci_pci_quirks, pdev);
181 if (quirk_id != NULL) {
182 int (*quirk)(struct usb_hcd *ohci);
183 quirk = (void *)quirk_id->driver_data;
188 ohci_hcd_init (ohci);
189 return ohci_init (ohci);
195 static int __devinit ohci_pci_start (struct usb_hcd *hcd)
197 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
200 #ifdef CONFIG_PM /* avoid warnings about unused pdev */
201 if (hcd->self.controller) {
202 struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
204 /* RWC may not be set for add-in PCI cards, since boot
205 * firmware probably ignored them. This transfers PCI
206 * PM wakeup capabilities (once the PCI layer is fixed).
208 if (device_may_wakeup(&pdev->dev))
209 ohci->hc_control |= OHCI_CTRL_RWC;
211 #endif /* CONFIG_PM */
213 ret = ohci_run (ohci);
215 ohci_err (ohci, "can't start\n");
221 #if defined(CONFIG_USB_PERSIST) && (defined(CONFIG_USB_EHCI_HCD) || \
222 defined(CONFIG_USB_EHCI_HCD_MODULE))
224 /* Following a power loss, we must prepare to regain control of the ports
225 * we used to own. This means turning on the port power before ehci-hcd
226 * tries to switch ownership.
228 * This isn't a 100% perfect solution. On most systems the OHCI controllers
229 * lie at lower PCI addresses than the EHCI controller, so they will be
230 * discovered (and hence resumed) first. But there is no guarantee things
231 * will always work this way. If the EHCI controller is resumed first and
232 * the OHCI ports are unpowered, then the handover will fail.
234 static void prepare_for_handover(struct usb_hcd *hcd)
236 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
239 /* Here we "know" root ports should always stay powered */
240 ohci_dbg(ohci, "powerup ports\n");
241 for (port = 0; port < ohci->num_ports; port++)
242 ohci_writel(ohci, RH_PS_PPS,
243 &ohci->regs->roothub.portstatus[port]);
245 /* Flush those writes */
246 ohci_readl(ohci, &ohci->regs->control);
252 static inline void prepare_for_handover(struct usb_hcd *hcd)
255 #endif /* CONFIG_USB_PERSIST etc. */
259 static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
261 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
265 /* Root hub was already suspended. Disable irq emission and
266 * mark HW unaccessible, bail out if RH has been resumed. Use
267 * the spinlock to properly synchronize with possible pending
268 * RH suspend or resume activity.
270 * This is still racy as hcd->state is manipulated outside of
271 * any locks =P But that will be a different fix.
273 spin_lock_irqsave (&ohci->lock, flags);
274 if (hcd->state != HC_STATE_SUSPENDED) {
278 ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
279 (void)ohci_readl(ohci, &ohci->regs->intrdisable);
281 /* make sure snapshot being resumed re-enumerates everything */
282 if (message.event == PM_EVENT_PRETHAW)
283 ohci_usb_reset(ohci);
285 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
287 spin_unlock_irqrestore (&ohci->lock, flags);
293 static int ohci_pci_resume (struct usb_hcd *hcd)
295 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
297 /* FIXME: we should try to detect loss of VBUS power here */
298 prepare_for_handover(hcd);
303 #endif /* CONFIG_PM */
306 /*-------------------------------------------------------------------------*/
308 static const struct hc_driver ohci_pci_hc_driver = {
309 .description = hcd_name,
310 .product_desc = "OHCI Host Controller",
311 .hcd_priv_size = sizeof(struct ohci_hcd),
314 * generic hardware linkage
317 .flags = HCD_MEMORY | HCD_USB11,
320 * basic lifecycle operations
322 .reset = ohci_pci_reset,
323 .start = ohci_pci_start,
325 .shutdown = ohci_shutdown,
328 /* these suspend/resume entries are for upstream PCI glue ONLY */
329 .suspend = ohci_pci_suspend,
330 .resume = ohci_pci_resume,
334 * managing i/o requests and associated device resources
336 .urb_enqueue = ohci_urb_enqueue,
337 .urb_dequeue = ohci_urb_dequeue,
338 .endpoint_disable = ohci_endpoint_disable,
343 .get_frame_number = ohci_get_frame,
348 .hub_status_data = ohci_hub_status_data,
349 .hub_control = ohci_hub_control,
350 .hub_irq_enable = ohci_rhsc_enable,
352 .bus_suspend = ohci_bus_suspend,
353 .bus_resume = ohci_bus_resume,
355 .start_port_reset = ohci_start_port_reset,
358 /*-------------------------------------------------------------------------*/
361 static const struct pci_device_id pci_ids [] = { {
362 /* handle any USB OHCI controller */
363 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
364 .driver_data = (unsigned long) &ohci_pci_hc_driver,
365 }, { /* end: all zeroes */ }
367 MODULE_DEVICE_TABLE (pci, pci_ids);
369 /* pci driver glue; this is a "new style" PCI driver module */
370 static struct pci_driver ohci_pci_driver = {
371 .name = (char *) hcd_name,
374 .probe = usb_hcd_pci_probe,
375 .remove = usb_hcd_pci_remove,
378 .suspend = usb_hcd_pci_suspend,
379 .resume = usb_hcd_pci_resume,
382 .shutdown = usb_hcd_pci_shutdown,