318 lines
7.8 KiB
C
318 lines
7.8 KiB
C
/*-
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* Copyright (c) 2010 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <sys/sysctl.h>
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#include <sys/sx.h>
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#include <sys/unistd.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/priv.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usb_core.h>
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#include <dev/usb/usb_busdma.h>
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#include <dev/usb/usb_process.h>
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#include <dev/usb/usb_util.h>
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#include <dev/usb/usb_controller.h>
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#include <dev/usb/usb_bus.h>
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#include <dev/usb/usb_pci.h>
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#include <dev/usb/controller/xhci.h>
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#include <dev/usb/controller/xhcireg.h>
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static device_probe_t xhci_pci_probe;
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static device_attach_t xhci_pci_attach;
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static device_detach_t xhci_pci_detach;
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static device_suspend_t xhci_pci_suspend;
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static device_resume_t xhci_pci_resume;
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static device_shutdown_t xhci_pci_shutdown;
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static void xhci_pci_takecontroller(device_t);
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static device_method_t xhci_device_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, xhci_pci_probe),
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DEVMETHOD(device_attach, xhci_pci_attach),
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DEVMETHOD(device_detach, xhci_pci_detach),
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DEVMETHOD(device_suspend, xhci_pci_suspend),
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DEVMETHOD(device_resume, xhci_pci_resume),
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DEVMETHOD(device_shutdown, xhci_pci_shutdown),
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/* bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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{0, 0}
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};
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static driver_t xhci_driver = {
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.name = "xhci",
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.methods = xhci_device_methods,
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.size = sizeof(struct xhci_softc),
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};
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static devclass_t xhci_devclass;
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DRIVER_MODULE(xhci, pci, xhci_driver, xhci_devclass, 0, 0);
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MODULE_DEPEND(xhci, usb, 1, 1, 1);
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static int
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xhci_pci_suspend(device_t self)
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{
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struct xhci_softc *sc = device_get_softc(self);
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int err;
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err = bus_generic_suspend(self);
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if (err)
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return (err);
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xhci_suspend(sc);
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return (0);
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}
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static int
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xhci_pci_resume(device_t self)
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{
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struct xhci_softc *sc = device_get_softc(self);
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xhci_pci_takecontroller(self);
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xhci_resume(sc);
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bus_generic_resume(self);
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return (0);
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}
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static int
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xhci_pci_shutdown(device_t self)
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{
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struct xhci_softc *sc = device_get_softc(self);
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int err;
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err = bus_generic_shutdown(self);
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if (err)
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return (err);
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xhci_shutdown(sc);
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return (0);
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}
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static const char *
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xhci_pci_match(device_t self)
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{
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if ((pci_get_class(self) == PCIC_SERIALBUS)
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&& (pci_get_subclass(self) == PCIS_SERIALBUS_USB)
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&& (pci_get_progif(self) == PCI_INTERFACE_XHCI)) {
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return ("XHCI (generic) USB 3.0 controller");
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}
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return (NULL); /* dunno */
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}
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static int
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xhci_pci_probe(device_t self)
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{
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const char *desc = xhci_pci_match(self);
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if (desc) {
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device_set_desc(self, desc);
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return (0);
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} else {
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return (ENXIO);
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}
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}
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static int
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xhci_pci_attach(device_t self)
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{
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struct xhci_softc *sc = device_get_softc(self);
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int err;
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int rid;
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/* XXX check for 64-bit capability */
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if (xhci_init(sc, self)) {
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device_printf(self, "Could not initialize softc\n");
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goto error;
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}
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pci_enable_busmaster(self);
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rid = PCI_XHCI_CBMEM;
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sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (!sc->sc_io_res) {
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device_printf(self, "Could not map memory\n");
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goto error;
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}
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sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
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sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
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sc->sc_io_size = rman_get_size(sc->sc_io_res);
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rid = 0;
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sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE);
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if (sc->sc_irq_res == NULL) {
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device_printf(self, "Could not allocate IRQ\n");
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goto error;
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}
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sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
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if (sc->sc_bus.bdev == NULL) {
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device_printf(self, "Could not add USB device\n");
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goto error;
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}
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device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
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sprintf(sc->sc_vendor, "0x%04x", pci_get_vendor(self));
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#if (__FreeBSD_version >= 700031)
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err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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NULL, (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
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#else
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err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
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(driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
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#endif
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if (err) {
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device_printf(self, "Could not setup IRQ, err=%d\n", err);
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sc->sc_intr_hdl = NULL;
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goto error;
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}
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xhci_pci_takecontroller(self);
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err = xhci_halt_controller(sc);
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if (err == 0)
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err = xhci_start_controller(sc);
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if (err == 0)
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err = device_probe_and_attach(sc->sc_bus.bdev);
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if (err) {
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device_printf(self, "XHCI halt/start/probe failed err=%d\n", err);
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goto error;
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}
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return (0);
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error:
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xhci_pci_detach(self);
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return (ENXIO);
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}
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static int
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xhci_pci_detach(device_t self)
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{
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struct xhci_softc *sc = device_get_softc(self);
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device_t bdev;
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if (sc->sc_bus.bdev != NULL) {
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bdev = sc->sc_bus.bdev;
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device_detach(bdev);
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device_delete_child(self, bdev);
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}
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/* during module unload there are lots of children leftover */
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device_delete_all_children(self);
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pci_disable_busmaster(self);
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if (sc->sc_irq_res && sc->sc_intr_hdl) {
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xhci_halt_controller(sc);
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bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
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sc->sc_intr_hdl = NULL;
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}
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if (sc->sc_irq_res) {
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bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
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sc->sc_irq_res = NULL;
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}
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if (sc->sc_io_res) {
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bus_release_resource(self, SYS_RES_MEMORY, PCI_XHCI_CBMEM,
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sc->sc_io_res);
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sc->sc_io_res = NULL;
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}
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xhci_uninit(sc);
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return (0);
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}
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static void
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xhci_pci_takecontroller(device_t self)
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{
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struct xhci_softc *sc = device_get_softc(self);
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uint32_t cparams;
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uint32_t eecp;
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uint32_t eec;
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uint16_t to;
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uint8_t bios_sem;
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cparams = XREAD4(sc, capa, XHCI_HCSPARAMS0);
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eec = -1;
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/* Synchronise with the BIOS if it owns the controller. */
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for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
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eecp += XHCI_XECP_NEXT(eec) << 2) {
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eec = XREAD4(sc, capa, eecp);
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if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
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continue;
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bios_sem = XREAD1(sc, capa, eecp +
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XHCI_XECP_BIOS_SEM);
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if (bios_sem == 0)
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continue;
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device_printf(sc->sc_bus.bdev, "waiting for BIOS "
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"to give up control\n");
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XWRITE1(sc, capa, eecp +
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XHCI_XECP_OS_SEM, 1);
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to = 500;
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while (1) {
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bios_sem = XREAD1(sc, capa, eecp +
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XHCI_XECP_BIOS_SEM);
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if (bios_sem == 0)
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break;
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if (--to == 0) {
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device_printf(sc->sc_bus.bdev,
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"timed out waiting for BIOS\n");
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break;
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}
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usb_pause_mtx(NULL, hz / 100); /* wait 10ms */
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}
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}
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}
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