diff options
Diffstat (limited to 'drivers/usb/host/pci-quirks.c')
-rw-r--r-- | drivers/usb/host/pci-quirks.c | 77 |
1 files changed, 46 insertions, 31 deletions
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index a495d48..7fec8bd 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -36,6 +36,7 @@ #define OHCI_INTRENABLE 0x10 #define OHCI_INTRDISABLE 0x14 #define OHCI_FMINTERVAL 0x34 +#define OHCI_HCFS (3 << 6) /* hc functional state */ #define OHCI_HCR (1 << 0) /* host controller reset */ #define OHCI_OCR (1 << 3) /* ownership change request */ #define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */ @@ -465,6 +466,8 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) { void __iomem *base; u32 control; + u32 fminterval; + int cnt; if (!mmio_resource_enabled(pdev, 0)) return; @@ -497,41 +500,32 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) } #endif - /* reset controller, preserving RWC (and possibly IR) */ - writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL); - readl(base + OHCI_CONTROL); + /* disable interrupts */ + writel((u32) ~0, base + OHCI_INTRDISABLE); - /* Some NVIDIA controllers stop working if kept in RESET for too long */ - if (pdev->vendor == PCI_VENDOR_ID_NVIDIA) { - u32 fminterval; - int cnt; + /* Reset the USB bus, if the controller isn't already in RESET */ + if (control & OHCI_HCFS) { + /* Go into RESET, preserving RWC (and possibly IR) */ + writel(control & OHCI_CTRL_MASK, base + OHCI_CONTROL); + readl(base + OHCI_CONTROL); - /* drive reset for at least 50 ms (7.1.7.5) */ + /* drive bus reset for at least 50 ms (7.1.7.5) */ msleep(50); + } - /* software reset of the controller, preserving HcFmInterval */ - fminterval = readl(base + OHCI_FMINTERVAL); - writel(OHCI_HCR, base + OHCI_CMDSTATUS); - - /* reset requires max 10 us delay */ - for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */ - if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0) - break; - udelay(1); - } - writel(fminterval, base + OHCI_FMINTERVAL); + /* software reset of the controller, preserving HcFmInterval */ + fminterval = readl(base + OHCI_FMINTERVAL); + writel(OHCI_HCR, base + OHCI_CMDSTATUS); - /* Now we're in the SUSPEND state with all devices reset - * and wakeups and interrupts disabled - */ + /* reset requires max 10 us delay */ + for (cnt = 30; cnt > 0; --cnt) { /* ... allow extra time */ + if ((readl(base + OHCI_CMDSTATUS) & OHCI_HCR) == 0) + break; + udelay(1); } + writel(fminterval, base + OHCI_FMINTERVAL); - /* - * disable interrupts - */ - writel(~(u32)0, base + OHCI_INTRDISABLE); - writel(~(u32)0, base + OHCI_INTRSTATUS); - + /* Now the controller is safely in SUSPEND and nothing can wake it up */ iounmap(base); } @@ -830,9 +824,13 @@ static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev) } } - /* Disable any BIOS SMIs */ - writel(XHCI_LEGACY_DISABLE_SMI, - base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); + val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); + /* Mask off (turn off) any enabled SMIs */ + val &= XHCI_LEGACY_DISABLE_SMI; + /* Mask all SMI events bits, RW1C */ + val |= XHCI_LEGACY_SMI_EVENTS; + /* Disable any BIOS SMIs and clear all SMI events*/ + writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); if (usb_is_intel_switchable_xhci(pdev)) usb_enable_xhci_ports(pdev); @@ -872,6 +870,22 @@ hc_init: static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev) { + /* Skip Netlogic mips SoC's internal PCI USB controller. + * This device does not need/support EHCI/OHCI handoff + */ + if (pdev->vendor == 0x184e) /* vendor Netlogic */ + return; + if (pdev->class != PCI_CLASS_SERIAL_USB_UHCI && + pdev->class != PCI_CLASS_SERIAL_USB_OHCI && + pdev->class != PCI_CLASS_SERIAL_USB_EHCI && + pdev->class != PCI_CLASS_SERIAL_USB_XHCI) + return; + + if (pci_enable_device(pdev) < 0) { + dev_warn(&pdev->dev, "Can't enable PCI device, " + "BIOS handoff failed.\n"); + return; + } if (pdev->class == PCI_CLASS_SERIAL_USB_UHCI) quirk_usb_handoff_uhci(pdev); else if (pdev->class == PCI_CLASS_SERIAL_USB_OHCI) @@ -880,5 +894,6 @@ static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev) quirk_usb_disable_ehci(pdev); else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI) quirk_usb_handoff_xhci(pdev); + pci_disable_device(pdev); } DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_usb_early_handoff); |