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usb: dwc3: implement hw.usb.xhci.use_polling

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Polling is currently only implemented in the xhci pci attachment.
Adding it to dwc3 doesn't make it much uglier, and supporting it can be
useful for confirming that hardware's otherwise functional when
interrupts are apparently not firing.

Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D38816
This commit is contained in:
Kyle Evans 2023-02-27 19:59:43 -06:00
parent dc8616edc5
commit 5e54bb1ea9
1 changed files with 28 additions and 6 deletions
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34
sys/dev/usb/controller/dwc3.c
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@ -103,6 +103,17 @@ struct snps_dwc3_softc {
#define IS_DMA_32B 1
static void
xhci_interrupt_poll(void *_sc)
{
struct xhci_softc *sc = _sc;
USB_BUS_UNLOCK(&sc->sc_bus);
xhci_interrupt(sc);
USB_BUS_LOCK(&sc->sc_bus);
usb_callout_reset(&sc->sc_callout, 1, (void *)&xhci_interrupt_poll, sc);
}
static int
snps_dwc3_attach_xhci(device_t dev)
{
@ -133,12 +144,14 @@ snps_dwc3_attach_xhci(device_t dev)
sprintf(sc->sc_vendor, "Synopsys");
device_set_desc(sc->sc_bus.bdev, "Synopsys");
err = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
NULL, (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
if (err != 0) {
device_printf(dev, "Failed to setup IRQ, %d\n", err);
sc->sc_intr_hdl = NULL;
return (err);
if (xhci_use_polling() == 0) {
err = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
NULL, (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
if (err != 0) {
device_printf(dev, "Failed to setup IRQ, %d\n", err);
sc->sc_intr_hdl = NULL;
return (err);
}
}
err = xhci_init(sc, dev, IS_DMA_32B);
@ -147,6 +160,15 @@ snps_dwc3_attach_xhci(device_t dev)
return (ENXIO);
}
usb_callout_init_mtx(&sc->sc_callout, &sc->sc_bus.bus_mtx, 0);
if (xhci_use_polling() != 0) {
device_printf(dev, "Interrupt polling at %dHz\n", hz);
USB_BUS_LOCK(&sc->sc_bus);
xhci_interrupt_poll(sc);
USB_BUS_UNLOCK(&sc->sc_bus);
}
err = xhci_start_controller(sc);
if (err != 0) {
device_printf(dev, "Failed to start XHCI controller, with error %d\n", err);