diff options
| -rw-r--r-- | drivers/usb/host/ohci-hub.c | 18 | ||||
| -rw-r--r-- | drivers/usb/host/ohci-pci.c | 1 | ||||
| -rw-r--r-- | drivers/usb/host/ohci.h | 2 |
3 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c index c81c8721cc5a..cd871b895013 100644 --- a/drivers/usb/host/ohci-hub.c +++ b/drivers/usb/host/ohci-hub.c @@ -90,6 +90,24 @@ __acquires(ohci->lock) dl_done_list (ohci); finish_unlinks (ohci, ohci_frame_no(ohci)); + /* + * Some controllers don't handle "global" suspend properly if + * there are unsuspended ports. For these controllers, put all + * the enabled ports into suspend before suspending the root hub. + */ + if (ohci->flags & OHCI_QUIRK_GLOBAL_SUSPEND) { + __hc32 __iomem *portstat = ohci->regs->roothub.portstatus; + int i; + unsigned temp; + + for (i = 0; i < ohci->num_ports; (++i, ++portstat)) { + temp = ohci_readl(ohci, portstat); + if ((temp & (RH_PS_PES | RH_PS_PSS)) == + RH_PS_PES) + ohci_writel(ohci, RH_PS_PSS, portstat); + } + } + /* maybe resume can wake root hub */ if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) { ohci->hc_control |= OHCI_CTRL_RWE; diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c index 90879e9ccbec..bb1509675727 100644 --- a/drivers/usb/host/ohci-pci.c +++ b/drivers/usb/host/ohci-pci.c @@ -160,6 +160,7 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd) ohci_dbg(ohci, "enabled AMD prefetch quirk\n"); } + ohci->flags |= OHCI_QUIRK_GLOBAL_SUSPEND; return 0; } diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h index 9250cada13f0..4550ce05af7f 100644 --- a/drivers/usb/host/ohci.h +++ b/drivers/usb/host/ohci.h @@ -405,6 +405,8 @@ struct ohci_hcd { #define OHCI_QUIRK_HUB_POWER 0x100 /* distrust firmware power/oc setup */ #define OHCI_QUIRK_AMD_PLL 0x200 /* AMD PLL quirk*/ #define OHCI_QUIRK_AMD_PREFETCH 0x400 /* pre-fetch for ISO transfer */ +#define OHCI_QUIRK_GLOBAL_SUSPEND 0x800 /* must suspend ports */ + // there are also chip quirks/bugs in init logic struct work_struct nec_work; /* Worker for NEC quirk */ |