diff options
| -rw-r--r-- | sys/dev/usb/controller/ehci.c | 62 |
1 files changed, 54 insertions, 8 deletions
diff --git a/sys/dev/usb/controller/ehci.c b/sys/dev/usb/controller/ehci.c index bb0d941..ad3a3fc 100644 --- a/sys/dev/usb/controller/ehci.c +++ b/sys/dev/usb/controller/ehci.c @@ -2261,10 +2261,26 @@ ehci_device_bulk_enter(struct usb_xfer *xfer) } static void +ehci_doorbell_async(struct ehci_softc *sc) +{ + uint32_t temp; + + /* + * XXX Performance quirk: Some Host Controllers have a too low + * interrupt rate. Issue an IAAD to stimulate the Host + * Controller after queueing the BULK transfer. + * + * XXX Force the host controller to refresh any QH caches. + */ + temp = EOREAD4(sc, EHCI_USBCMD); + if (!(temp & EHCI_CMD_IAAD)) + EOWRITE4(sc, EHCI_USBCMD, temp | EHCI_CMD_IAAD); +} + +static void ehci_device_bulk_start(struct usb_xfer *xfer) { ehci_softc_t *sc = EHCI_BUS2SC(xfer->xroot->bus); - uint32_t temp; /* setup TD's and QH */ ehci_setup_standard_chain(xfer, &sc->sc_async_p_last); @@ -2279,13 +2295,7 @@ ehci_device_bulk_start(struct usb_xfer *xfer) if (sc->sc_flags & EHCI_SCFLG_IAADBUG) return; - /* XXX Performance quirk: Some Host Controllers have a too low - * interrupt rate. Issue an IAAD to stimulate the Host - * Controller after queueing the BULK transfer. - */ - temp = EOREAD4(sc, EHCI_USBCMD); - if (!(temp & EHCI_CMD_IAAD)) - EOWRITE4(sc, EHCI_USBCMD, temp | EHCI_CMD_IAAD); + ehci_doorbell_async(sc); } static const struct usb_pipe_methods ehci_device_bulk_methods = @@ -3902,6 +3912,41 @@ ehci_set_hw_power(struct usb_bus *bus) return; } +static void +ehci_start_dma_delay_second(struct usb_xfer *xfer) +{ + struct ehci_softc *sc = EHCI_BUS2SC(xfer->xroot->bus); + + DPRINTF("\n"); + + /* trigger doorbell */ + ehci_doorbell_async(sc); + + /* give the doorbell 4ms */ + usbd_transfer_timeout_ms(xfer, + (void (*)(void *))&usb_dma_delay_done_cb, 4); +} + +/* + * Ring the doorbell twice before freeing any DMA descriptors. Some host + * controllers apparently cache the QH descriptors and need a message + * that the cache needs to be discarded. + */ +static void +ehci_start_dma_delay(struct usb_xfer *xfer) +{ + struct ehci_softc *sc = EHCI_BUS2SC(xfer->xroot->bus); + + DPRINTF("\n"); + + /* trigger doorbell */ + ehci_doorbell_async(sc); + + /* give the doorbell 4ms */ + usbd_transfer_timeout_ms(xfer, + (void (*)(void *))&ehci_start_dma_delay_second, 4); +} + static const struct usb_bus_methods ehci_bus_methods = { .endpoint_init = ehci_ep_init, @@ -3914,4 +3959,5 @@ static const struct usb_bus_methods ehci_bus_methods = .set_hw_power_sleep = ehci_set_hw_power_sleep, .roothub_exec = ehci_roothub_exec, .xfer_poll = ehci_do_poll, + .start_dma_delay = ehci_start_dma_delay, }; |
