/* $OpenBSD: ehci_pci.c,v 1.13 2008/04/09 19:03:54 deraadt Exp $ */ /* $NetBSD: ehci_pci.c,v 1.15 2004/04/23 21:13:06 itojun Exp $ */ /* * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Lennart Augustsson (lennart@augustsson.net). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef EHCI_DEBUG #define DPRINTF(x) if (ehcidebug) printf x extern int ehcidebug; #else #define DPRINTF(x) #endif struct ehci_pci_softc { ehci_softc_t sc; pci_chipset_tag_t sc_pc; pcitag_t sc_tag; void *sc_ih; /* interrupt vectoring */ }; int ehci_pci_match(struct device *, void *, void *); void ehci_pci_attach(struct device *, struct device *, void *); int ehci_pci_detach(struct device *, int); void ehci_pci_givecontroller(struct ehci_pci_softc *); void ehci_pci_takecontroller(struct ehci_pci_softc *); void ehci_pci_shutdown(void *); struct cfattach ehci_pci_ca = { sizeof(struct ehci_pci_softc), ehci_pci_match, ehci_pci_attach, ehci_pci_detach, ehci_activate }; int ehci_pci_match(struct device *parent, void *match, void *aux) { struct pci_attach_args *pa = (struct pci_attach_args *) aux; if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB && PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_EHCI) return (1); return (0); } void ehci_pci_attach(struct device *parent, struct device *self, void *aux) { struct ehci_pci_softc *sc = (struct ehci_pci_softc *)self; struct pci_attach_args *pa = (struct pci_attach_args *)aux; pci_chipset_tag_t pc = pa->pa_pc; pcitag_t tag = pa->pa_tag; char const *intrstr; pci_intr_handle_t ih; const char *vendor; char *devname = sc->sc.sc_bus.bdev.dv_xname; usbd_status r; int s; /* Map I/O registers */ if (pci_mapreg_map(pa, PCI_CBMEM, PCI_MAPREG_TYPE_MEM, 0, &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size, 0)) { printf(": can't map memory space\n"); return; } sc->sc_pc = pc; sc->sc_tag = tag; sc->sc.sc_bus.dmatag = pa->pa_dmat; /* Disable interrupts, so we don't get any spurious ones. */ s = splhardusb(); sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH); DPRINTF(("%s: offs=%d\n", devname, sc->sc.sc_offs)); EOWRITE2(&sc->sc, EHCI_USBINTR, 0); /* Map and establish the interrupt. */ if (pci_intr_map(pa, &ih)) { printf(": couldn't map interrupt\n"); goto unmap_ret; } intrstr = pci_intr_string(pc, ih); sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, ehci_intr, sc, devname); if (sc->sc_ih == NULL) { printf(": couldn't establish interrupt"); if (intrstr != NULL) printf(" at %s", intrstr); printf("\n"); goto unmap_ret; } printf(": %s\n", intrstr); switch(pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) { case PCI_USBREV_PRE_1_0: case PCI_USBREV_1_0: case PCI_USBREV_1_1: sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; printf("%s: pre-2.0 USB rev\n", devname); goto unmap_ret; case PCI_USBREV_2_0: sc->sc.sc_bus.usbrev = USBREV_2_0; break; default: sc->sc.sc_bus.usbrev = USBREV_UNKNOWN; break; } /* Figure out vendor for root hub descriptor. */ vendor = pci_findvendor(pa->pa_id); sc->sc.sc_id_vendor = PCI_VENDOR(pa->pa_id); if (vendor) strlcpy(sc->sc.sc_vendor, vendor, sizeof(sc->sc.sc_vendor)); else snprintf(sc->sc.sc_vendor, sizeof(sc->sc.sc_vendor), "vendor 0x%04x", PCI_VENDOR(pa->pa_id)); /* Enable workaround for dropped interrupts as required */ if (sc->sc.sc_id_vendor == PCI_VENDOR_VIATECH) sc->sc.sc_flags |= EHCIF_DROPPED_INTR_WORKAROUND; ehci_pci_takecontroller(sc); r = ehci_init(&sc->sc); if (r != USBD_NORMAL_COMPLETION) { printf("%s: init failed, error=%d\n", devname, r); goto unmap_ret; } sc->sc.sc_shutdownhook = shutdownhook_establish(ehci_pci_shutdown, sc); splx(s); /* Attach usb device. */ sc->sc.sc_child = config_found((void *)sc, &sc->sc.sc_bus, usbctlprint); return; unmap_ret: bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); splx(s); } int ehci_pci_detach(struct device *self, int flags) { struct ehci_pci_softc *sc = (struct ehci_pci_softc *)self; int rv; rv = ehci_detach(&sc->sc, flags); if (rv) return (rv); if (sc->sc_ih != NULL) { pci_intr_disestablish(sc->sc_pc, sc->sc_ih); sc->sc_ih = NULL; } if (sc->sc.sc_size) { bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size); sc->sc.sc_size = 0; } return (0); } #if 0 /* not used */ void ehci_pci_givecontroller(struct ehci_pci_softc *sc) { u_int32_t cparams, eec, legsup; int eecp; cparams = EREAD4(&sc->sc, EHCI_HCCPARAMS); for (eecp = EHCI_HCC_EECP(cparams); eecp != 0; eecp = EHCI_EECP_NEXT(eec)) { eec = pci_conf_read(sc->sc_pc, sc->sc_tag, eecp); if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) continue; legsup = eec; pci_conf_write(sc->sc_pc, sc->sc_tag, eecp, legsup & ~EHCI_LEGSUP_OSOWNED); } } #endif void ehci_pci_takecontroller(struct ehci_pci_softc *sc) { u_int32_t cparams, eec, legsup; int eecp, i; cparams = EREAD4(&sc->sc, EHCI_HCCPARAMS); /* Synchronise with the BIOS if it owns the controller. */ for (eecp = EHCI_HCC_EECP(cparams); eecp != 0; eecp = EHCI_EECP_NEXT(eec)) { eec = pci_conf_read(sc->sc_pc, sc->sc_tag, eecp); if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) continue; legsup = eec; if (legsup & EHCI_LEGSUP_BIOSOWNED) { pci_conf_write(sc->sc_pc, sc->sc_tag, eecp, legsup | EHCI_LEGSUP_OSOWNED); DPRINTF(("%s: waiting for BIOS to give up control\n", sc->sc.sc_bus.bdev.dv_xname)); for (i = 0; i < 5000; i++) { legsup = pci_conf_read(sc->sc_pc, sc->sc_tag, eecp); if ((legsup & EHCI_LEGSUP_BIOSOWNED) == 0) break; DELAY(1000); } if (legsup & EHCI_LEGSUP_BIOSOWNED) printf("%s: timed out waiting for BIOS\n", sc->sc.sc_bus.bdev.dv_xname); } } } void ehci_pci_shutdown(void *v) { struct ehci_pci_softc *sc = (struct ehci_pci_softc *)v; ehci_shutdown(&sc->sc); #if 0 /* best not to do this anymore; BIOS SMM spins? */ ehci_pci_givecontroller(sc); #endif }