diff options
Diffstat (limited to 'drivers/usb/host/pci-quirks.c')
| -rw-r--r-- | drivers/usb/host/pci-quirks.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index b7fd3f644e1e..b1aa350fd32f 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -138,11 +138,23 @@ reset_needed: } EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc); +static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask) +{ + u16 cmd; + return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask); +} + +#define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO) +#define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY) + static void __devinit quirk_usb_handoff_uhci(struct pci_dev *pdev) { unsigned long base = 0; int i; + if (!pio_enabled(pdev)) + return; + for (i = 0; i < PCI_ROM_RESOURCE; i++) if ((pci_resource_flags(pdev, i) & IORESOURCE_IO)) { base = pci_resource_start(pdev, i); @@ -153,12 +165,20 @@ static void __devinit quirk_usb_handoff_uhci(struct pci_dev *pdev) uhci_check_and_reset_hc(pdev, base); } +static int __devinit mmio_resource_enabled(struct pci_dev *pdev, int idx) +{ + return pci_resource_start(pdev, idx) && mmio_enabled(pdev); +} + static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) { void __iomem *base; int wait_time; u32 control; + if (!mmio_resource_enabled(pdev, 0)) + return; + base = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); if (base == NULL) return; @@ -201,6 +221,9 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev) u32 hcc_params, val, temp; u8 cap_length; + if (!mmio_resource_enabled(pdev, 0)) + return; + base = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); if (base == NULL) return; |