diff options
Diffstat (limited to 'sys/dev/usb2/controller/uhci2.c')
| -rw-r--r-- | sys/dev/usb2/controller/uhci2.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sys/dev/usb2/controller/uhci2.c b/sys/dev/usb2/controller/uhci2.c index e393218..e967a9e 100644 --- a/sys/dev/usb2/controller/uhci2.c +++ b/sys/dev/usb2/controller/uhci2.c @@ -2396,6 +2396,24 @@ uhci_portreset(uhci_softc_t *sc, uint16_t index, uint8_t use_polling) else return (USB_ERR_IOERROR); + /* + * Before we do anything, turn on SOF messages on the USB + * BUS. Some USB devices do not cope without them! + */ + if (!(UREAD2(sc, UHCI_CMD) & UHCI_CMD_RS)) { + + DPRINTF("Activating SOFs!\n"); + + UHCICMD(sc, (UHCI_CMD_MAXP | UHCI_CMD_RS)); + + /* wait a little bit */ + if (use_polling) { + DELAY(10000); + } else { + usb2_pause_mtx(&sc->sc_bus.bus_mtx, 10); + } + } + x = URWMASK(UREAD2(sc, port)); UWRITE2(sc, port, x | UHCI_PORTSC_PR); @@ -3320,7 +3338,13 @@ uhci_set_hw_power(struct usb2_bus *bus) flags = bus->hw_power_state; + /* + * WARNING: Some FULL speed USB devices require periodic SOF + * messages! If any USB devices are connected through the + * UHCI, power save will be disabled! + */ if (flags & (USB_HW_POWER_CONTROL | + USB_HW_POWER_NON_ROOT_HUB | USB_HW_POWER_BULK | USB_HW_POWER_INTERRUPT | USB_HW_POWER_ISOC)) { |
