/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * * [ Initialisation is based on Linus' ] * [ uhci code and gregs ohci fragments ] * [ (C) Copyright 1999 Linus Torvalds ] * [ (C) Copyright 1999 Gregory P. Smith] * * PCI Bus Glue * * This file is licenced under the GPL. */ #ifndef CONFIG_PCI #error "This file is PCI bus glue. CONFIG_PCI must be defined." #endif /*-------------------------------------------------------------------------*/ static int broken_suspend(struct usb_hcd *hcd) { device_init_wakeup(&hcd->self.root_hub->dev, 0); return 0; } /* AMD 756, for most chips (early revs), corrupts register * values on read ... so enable the vendor workaround. */ static int ohci_quirk_amd756(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); ohci->flags = OHCI_QUIRK_AMD756; ohci_dbg (ohci, "AMD756 erratum 4 workaround\n"); /* also erratum 10 (suspend/resume issues) */ return broken_suspend(hcd); } /* Apple's OHCI driver has a lot of bizarre workarounds * for this chip. Evidently control and bulk lists * can get confused. (B&W G3 models, and ...) */ static int ohci_quirk_opti(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n"); return 0; } /* Check for NSC87560. We have to look at the bridge (fn1) to * identify the USB (fn2). This quirk might apply to more or * even all NSC stuff. */ static int ohci_quirk_ns(struct usb_hcd *hcd) { struct pci_dev *pdev = to_pci_dev(hcd->self.controller); struct pci_dev *b; b = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1)); if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO && b->vendor == PCI_VENDOR_ID_NS) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); ohci->flags |= OHCI_QUIRK_SUPERIO; ohci_dbg (ohci, "Using NSC SuperIO setup\n"); } pci_dev_put(b); return 0; } /* Check for Compaq's ZFMicro chipset, which needs short * delays before control or bulk queues get re-activated * in finish_unlinks() */ static int ohci_quirk_zfmicro(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); ohci->flags |= OHCI_QUIRK_ZFMICRO; ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n"); return 0; } /* Check for Toshiba SCC OHCI which has big endian registers * and little endian in memory data structures */ static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); /* That chip is only present in the southbridge of some * cell based platforms which are supposed to select * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if * that was the case though. */ #ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO ohci->flags |= OHCI_QUIRK_BE_MMIO; ohci_dbg (ohci, "enabled big endian Toshiba quirk\n"); return 0; #else ohci_err (ohci, "unsupported big endian Toshiba quirk\n"); return -ENXIO; #endif } /* Check for NEC chip and apply quirk for allegedly lost interrupts. */ static void ohci_quirk_nec_worker(struct work_struct *work) { struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work); int status; status = ohci_init(ohci); if (status != 0) { ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n", "ohci_init", status); return; } status = ohci_restart(ohci); if (status != 0) ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n", "ohci_restart", status); } static int ohci_quirk_nec(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); ohci->flags |= OHCI_QUIRK_NEC; INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker); ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n"); return 0; } /* List of quirks for OHCI */ static const struct pci_device_id ohci_pci_quirks[] = { { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c), .driver_data = (unsigned long)ohci_quirk_amd756, }, { PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861), .driver_data = (unsigned long)ohci_quirk_opti, }, { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID), .driver_data = (unsigned long)ohci_quirk_ns, }, { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8), .driver_data = (unsigned long)ohci_quirk_zfmicro, }, { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6), .driver_data = (unsigned long)ohci_quirk_toshiba_scc, }, { PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB), .driver_data = (unsigned long)ohci_quirk_nec, }, { /* Toshiba portege 4000 */ .vendor = PCI_VENDOR_ID_AL, .device = 0x5237, .subvendor = PCI_VENDOR_ID_TOSHIBA, .subdevice = 0x0004, .driver_data = (unsigned long) broken_suspend, }, { PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152), .driver_data = (unsigned long) broken_suspend, }, /* FIXME for some of the early AMD 760 southbridges, OHCI * won't work at all. blacklist them. */ {}, }; static int ohci_pci_reset (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret = 0; if (hcd->self.controller) { struct pci_dev *pdev = to_pci_dev(hcd->self.controller); const struct pci_device_id *quirk_id; quirk_id = pci_match_id(ohci_pci_quirks, pdev); if (quirk_id != NULL) { int (*quirk)(struct usb_hcd *ohci); quirk = (void *)quirk_id->driver_data; ret = quirk(hcd); } } if (ret == 0) { ohci_hcd_init (ohci); return ohci_init (ohci); } return ret; } static int __devinit ohci_pci_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; #ifdef CONFIG_PM /* avoid warnings about unused pdev */ if (hcd->self.controller) { struct pci_dev *pdev = to_pci_dev(hcd->self.controller); /* RWC may not be set for add-in PCI cards, since boot * firmware probably ignored them. This transfers PCI * PM wakeup capabilities (once the PCI layer is fixed). */ if (device_may_wakeup(&pdev->dev)) ohci->hc_control |= OHCI_CTRL_RWC; } #endif /* CONFIG_PM */ ret = ohci_run (ohci); if (ret < 0) { ohci_err (ohci, "can't start\n"); ohci_stop (hcd); } return ret; } #if defined(CONFIG_USB_PERSIST) && (defined(CONFIG_USB_EHCI_HCD) || \ defined(CONFIG_USB_EHCI_HCD_MODULE)) /* Following a power loss, we must prepare to regain control of the ports * we used to own. This means turning on the port power before ehci-hcd * tries to switch ownership. * * This isn't a 100% perfect solution. On most systems the OHCI controllers * lie at lower PCI addresses than the EHCI controller, so they will be * discovered (and hence resumed) first. But there is no guarantee things * will always work this way. If the EHCI controller is resumed first and * the OHCI ports are unpowered, then the handover will fail. */ static void prepare_for_handover(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); int port; /* Here we "know" root ports should always stay powered */ ohci_dbg(ohci, "powerup ports\n"); for (port = 0; port < ohci->num_ports; port++) ohci_writel(ohci, RH_PS_PPS, &ohci->regs->roothub.portstatus[port]); /* Flush those writes */ ohci_readl(ohci, &ohci->regs->control); msleep(20); } #else static inline void prepare_for_handover(struct usb_hcd *hcd) { } #endif /* CONFIG_USB_PERSIST etc. */ #ifdef CONFIG_PM static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); unsigned long flags; int rc = 0; /* Root hub was already suspended. Disable irq emission and * mark HW unaccessible, bail out if RH has been resumed. Use * the spinlock to properly synchronize with possible pending * RH suspend or resume activity. * * This is still racy as hcd->state is manipulated outside of * any locks =P But that will be a different fix. */ spin_lock_irqsave (&ohci->lock, flags); if (hcd->state != HC_STATE_SUSPENDED) { rc = -EINVAL; goto bail; } ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); (void)ohci_readl(ohci, &ohci->regs->intrdisable); /* make sure snapshot being resumed re-enumerates everything */ if (message.event == PM_EVENT_PRETHAW) ohci_usb_reset(ohci); clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); bail: spin_unlock_irqrestore (&ohci->lock, flags); return rc; } static int ohci_pci_resume (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); /* FIXME: we should try to detect loss of VBUS power here */ prepare_for_handover(hcd); ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrenable); return 0; } #endif /* CONFIG_PM */ /*-------------------------------------------------------------------------*/ static const struct hc_driver ohci_pci_hc_driver = { .description = hcd_name, .product_desc = "OHCI Host Controller", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_MEMORY | HCD_USB11, /* * basic lifecycle operations */ .reset = ohci_pci_reset, .start = ohci_pci_start, .stop = ohci_stop, .shutdown = ohci_shutdown, #ifdef CONFIG_PM /* these suspend/resume entries are for upstream PCI glue ONLY */ .suspend = ohci_pci_suspend, .resume = ohci_pci_resume, #endif /* * managing i/o requests and associated device resources */ .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, /* * scheduling support */ .get_frame_number = ohci_get_frame, /* * root hub support */ .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, .hub_irq_enable = ohci_rhsc_enable, #ifdef CONFIG_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; /*-------------------------------------------------------------------------*/ static const struct pci_device_id pci_ids [] = { { /* handle any USB OHCI controller */ PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0), .driver_data = (unsigned long) &ohci_pci_hc_driver, }, { /* end: all zeroes */ } }; MODULE_DEVICE_TABLE (pci, pci_ids); /* pci driver glue; this is a "new style" PCI driver module */ static struct pci_driver ohci_pci_driver = { .name = (char *) hcd_name, .id_table = pci_ids, .probe = usb_hcd_pci_probe, .remove = usb_hcd_pci_remove, #ifdef CONFIG_PM .suspend = usb_hcd_pci_suspend, .resume = usb_hcd_pci_resume, #endif .shutdown = usb_hcd_pci_shutdown, };