diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 10 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 18 |
2 files changed, 23 insertions, 5 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 9030994aba98..f2ceb5fdbeb7 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -126,6 +126,11 @@ static unsigned park = 0; module_param (park, uint, S_IRUGO); MODULE_PARM_DESC (park, "park setting; 1-3 back-to-back async packets"); +/* for flakey hardware, ignore overcurrent indicators */ +static int ignore_oc = 0; +module_param (ignore_oc, bool, S_IRUGO); +MODULE_PARM_DESC (ignore_oc, "ignore bogus hardware overcurrent indications"); + #define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT) /*-------------------------------------------------------------------------*/ @@ -541,9 +546,10 @@ static int ehci_run (struct usb_hcd *hcd) temp = HC_VERSION(readl (&ehci->caps->hc_capbase)); ehci_info (ehci, - "USB %x.%x started, EHCI %x.%02x, driver %s\n", + "USB %x.%x started, EHCI %x.%02x, driver %s%s\n", ((ehci->sbrn & 0xf0)>>4), (ehci->sbrn & 0x0f), - temp >> 8, temp & 0xff, DRIVER_VERSION); + temp >> 8, temp & 0xff, DRIVER_VERSION, + ignore_oc ? ", overcurrent ignored" : ""); writel (INTR_MASK, &ehci->regs->intr_enable); /* Turn On Interrupts */ diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 7c170a29f959..0a56dfa2745d 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -218,6 +218,7 @@ ehci_hub_status_data (struct usb_hcd *hcd, char *buf) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); u32 temp, status = 0; + u32 mask; int ports, i, retval = 1; unsigned long flags; @@ -233,6 +234,18 @@ ehci_hub_status_data (struct usb_hcd *hcd, char *buf) retval++; } + /* Some boards (mostly VIA?) report bogus overcurrent indications, + * causing massive log spam unless we completely ignore them. It + * may be relevant that VIA VT8235 controlers, where PORT_POWER is + * always set, seem to clear PORT_OCC and PORT_CSC when writing to + * PORT_POWER; that's surprising, but maybe within-spec. + */ + if (!ignore_oc) + mask = PORT_CSC | PORT_PEC | PORT_OCC; + else + mask = PORT_CSC | PORT_PEC; + // PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND + /* no hub change reports (bit 0) for now (power, ...) */ /* port N changes (bit N)? */ @@ -250,8 +263,7 @@ ehci_hub_status_data (struct usb_hcd *hcd, char *buf) } if (!(temp & PORT_CONNECT)) ehci->reset_done [i] = 0; - if ((temp & (PORT_CSC | PORT_PEC | PORT_OCC)) != 0 - // PORT_STAT_C_SUSPEND? + if ((temp & mask) != 0 || ((temp & PORT_RESUME) != 0 && time_after (jiffies, ehci->reset_done [i]))) { @@ -418,7 +430,7 @@ static int ehci_hub_control ( status |= 1 << USB_PORT_FEAT_C_CONNECTION; if (temp & PORT_PEC) status |= 1 << USB_PORT_FEAT_C_ENABLE; - if (temp & PORT_OCC) + if ((temp & PORT_OCC) && !ignore_oc) status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; /* whoever resumes must GetPortStatus to complete it!! */ |