Annotation of sys/dev/pci/ehci_pci.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ehci_pci.c,v 1.12 2007/06/10 14:49:01 mbalmer Exp $ */
! 2: /* $NetBSD: ehci_pci.c,v 1.15 2004/04/23 21:13:06 itojun Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Lennart Augustsson (lennart@augustsson.net).
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: #include <sys/param.h>
! 41: #include <sys/systm.h>
! 42: #include <sys/kernel.h>
! 43: #include <sys/rwlock.h>
! 44: #include <sys/device.h>
! 45: #include <sys/proc.h>
! 46: #include <sys/queue.h>
! 47:
! 48: #include <machine/bus.h>
! 49:
! 50: #include <dev/pci/pcidevs.h>
! 51: #include <dev/pci/pcivar.h>
! 52:
! 53: #include <dev/usb/usb.h>
! 54: #include <dev/usb/usbdi.h>
! 55: #include <dev/usb/usbdivar.h>
! 56: #include <dev/usb/usb_mem.h>
! 57:
! 58: #include <dev/usb/ehcireg.h>
! 59: #include <dev/usb/ehcivar.h>
! 60:
! 61: #ifdef EHCI_DEBUG
! 62: #define DPRINTF(x) if (ehcidebug) printf x
! 63: extern int ehcidebug;
! 64: #else
! 65: #define DPRINTF(x)
! 66: #endif
! 67:
! 68: struct ehci_pci_softc {
! 69: ehci_softc_t sc;
! 70: pci_chipset_tag_t sc_pc;
! 71: pcitag_t sc_tag;
! 72: void *sc_ih; /* interrupt vectoring */
! 73: };
! 74:
! 75: int ehci_pci_match(struct device *, void *, void *);
! 76: void ehci_pci_attach(struct device *, struct device *, void *);
! 77: int ehci_pci_detach(struct device *, int);
! 78: void ehci_pci_givecontroller(struct ehci_pci_softc *);
! 79: void ehci_pci_takecontroller(struct ehci_pci_softc *);
! 80: void ehci_pci_shutdown(void *);
! 81:
! 82: struct cfattach ehci_pci_ca = {
! 83: sizeof(struct ehci_pci_softc), ehci_pci_match, ehci_pci_attach,
! 84: ehci_pci_detach, ehci_activate
! 85: };
! 86:
! 87:
! 88: int
! 89: ehci_pci_match(struct device *parent, void *match, void *aux)
! 90: {
! 91: struct pci_attach_args *pa = (struct pci_attach_args *) aux;
! 92:
! 93: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_SERIALBUS &&
! 94: PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_SERIALBUS_USB &&
! 95: PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_EHCI)
! 96: return (1);
! 97:
! 98: return (0);
! 99: }
! 100:
! 101: void
! 102: ehci_pci_attach(struct device *parent, struct device *self, void *aux)
! 103: {
! 104: struct ehci_pci_softc *sc = (struct ehci_pci_softc *)self;
! 105: struct pci_attach_args *pa = (struct pci_attach_args *)aux;
! 106: pci_chipset_tag_t pc = pa->pa_pc;
! 107: pcitag_t tag = pa->pa_tag;
! 108: char const *intrstr;
! 109: pci_intr_handle_t ih;
! 110: const char *vendor;
! 111: char *devname = sc->sc.sc_bus.bdev.dv_xname;
! 112: usbd_status r;
! 113: int s;
! 114:
! 115: /* Map I/O registers */
! 116: if (pci_mapreg_map(pa, PCI_CBMEM, PCI_MAPREG_TYPE_MEM, 0,
! 117: &sc->sc.iot, &sc->sc.ioh, NULL, &sc->sc.sc_size, 0)) {
! 118: printf(": can't map memory space\n");
! 119: return;
! 120: }
! 121:
! 122: sc->sc_pc = pc;
! 123: sc->sc_tag = tag;
! 124: sc->sc.sc_bus.dmatag = pa->pa_dmat;
! 125:
! 126: /* Disable interrupts, so we don't get any spurious ones. */
! 127: s = splhardusb();
! 128: sc->sc.sc_offs = EREAD1(&sc->sc, EHCI_CAPLENGTH);
! 129: DPRINTF(("%s: offs=%d\n", devname, sc->sc.sc_offs));
! 130: EOWRITE2(&sc->sc, EHCI_USBINTR, 0);
! 131:
! 132: /* Map and establish the interrupt. */
! 133: if (pci_intr_map(pa, &ih)) {
! 134: printf(": couldn't map interrupt\n");
! 135: goto unmap_ret;
! 136: }
! 137: intrstr = pci_intr_string(pc, ih);
! 138: sc->sc_ih = pci_intr_establish(pc, ih, IPL_USB, ehci_intr, sc, devname);
! 139: if (sc->sc_ih == NULL) {
! 140: printf(": couldn't establish interrupt");
! 141: if (intrstr != NULL)
! 142: printf(" at %s", intrstr);
! 143: printf("\n");
! 144: goto unmap_ret;
! 145: }
! 146: printf(": %s\n", intrstr);
! 147:
! 148: switch(pci_conf_read(pc, tag, PCI_USBREV) & PCI_USBREV_MASK) {
! 149: case PCI_USBREV_PRE_1_0:
! 150: case PCI_USBREV_1_0:
! 151: case PCI_USBREV_1_1:
! 152: sc->sc.sc_bus.usbrev = USBREV_UNKNOWN;
! 153: printf("%s: pre-2.0 USB rev\n", devname);
! 154: goto unmap_ret;
! 155: case PCI_USBREV_2_0:
! 156: sc->sc.sc_bus.usbrev = USBREV_2_0;
! 157: break;
! 158: default:
! 159: sc->sc.sc_bus.usbrev = USBREV_UNKNOWN;
! 160: break;
! 161: }
! 162:
! 163: /* Figure out vendor for root hub descriptor. */
! 164: vendor = pci_findvendor(pa->pa_id);
! 165: sc->sc.sc_id_vendor = PCI_VENDOR(pa->pa_id);
! 166: if (vendor)
! 167: strlcpy(sc->sc.sc_vendor, vendor, sizeof(sc->sc.sc_vendor));
! 168: else
! 169: snprintf(sc->sc.sc_vendor, sizeof(sc->sc.sc_vendor),
! 170: "vendor 0x%04x", PCI_VENDOR(pa->pa_id));
! 171:
! 172: /* Enable workaround for dropped interrupts as required */
! 173: if (sc->sc.sc_id_vendor == PCI_VENDOR_VIATECH)
! 174: sc->sc.sc_flags |= EHCIF_DROPPED_INTR_WORKAROUND;
! 175:
! 176: ehci_pci_takecontroller(sc);
! 177: r = ehci_init(&sc->sc);
! 178: if (r != USBD_NORMAL_COMPLETION) {
! 179: printf("%s: init failed, error=%d\n", devname, r);
! 180: goto unmap_ret;
! 181: }
! 182:
! 183: sc->sc.sc_shutdownhook = shutdownhook_establish(ehci_pci_shutdown, sc);
! 184: splx(s);
! 185:
! 186: /* Attach usb device. */
! 187: sc->sc.sc_child = config_found((void *)sc, &sc->sc.sc_bus,
! 188: usbctlprint);
! 189:
! 190: return;
! 191:
! 192: unmap_ret:
! 193: bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
! 194: splx(s);
! 195: }
! 196:
! 197: int
! 198: ehci_pci_detach(struct device *self, int flags)
! 199: {
! 200: struct ehci_pci_softc *sc = (struct ehci_pci_softc *)self;
! 201: int rv;
! 202:
! 203: rv = ehci_detach(&sc->sc, flags);
! 204: if (rv)
! 205: return (rv);
! 206: if (sc->sc_ih != NULL) {
! 207: pci_intr_disestablish(sc->sc_pc, sc->sc_ih);
! 208: sc->sc_ih = NULL;
! 209: }
! 210: if (sc->sc.sc_size) {
! 211: bus_space_unmap(sc->sc.iot, sc->sc.ioh, sc->sc.sc_size);
! 212: sc->sc.sc_size = 0;
! 213: }
! 214: return (0);
! 215: }
! 216:
! 217: void
! 218: ehci_pci_givecontroller(struct ehci_pci_softc *sc)
! 219: {
! 220: u_int32_t cparams, eec, legsup;
! 221: int eecp;
! 222:
! 223: cparams = EREAD4(&sc->sc, EHCI_HCCPARAMS);
! 224: for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
! 225: eecp = EHCI_EECP_NEXT(eec)) {
! 226: eec = pci_conf_read(sc->sc_pc, sc->sc_tag, eecp);
! 227: if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP)
! 228: continue;
! 229: legsup = eec;
! 230: pci_conf_write(sc->sc_pc, sc->sc_tag, eecp,
! 231: legsup & ~EHCI_LEGSUP_OSOWNED);
! 232: }
! 233: }
! 234:
! 235: void
! 236: ehci_pci_takecontroller(struct ehci_pci_softc *sc)
! 237: {
! 238: u_int32_t cparams, eec, legsup;
! 239: int eecp, i;
! 240:
! 241: cparams = EREAD4(&sc->sc, EHCI_HCCPARAMS);
! 242: /* Synchronise with the BIOS if it owns the controller. */
! 243: for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
! 244: eecp = EHCI_EECP_NEXT(eec)) {
! 245: eec = pci_conf_read(sc->sc_pc, sc->sc_tag, eecp);
! 246: if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP)
! 247: continue;
! 248: legsup = eec;
! 249: pci_conf_write(sc->sc_pc, sc->sc_tag, eecp,
! 250: legsup | EHCI_LEGSUP_OSOWNED);
! 251: if (legsup & EHCI_LEGSUP_BIOSOWNED) {
! 252: DPRINTF(("%s: waiting for BIOS to give up control\n",
! 253: sc->sc.sc_bus.bdev.dv_xname));
! 254: for (i = 0; i < 5000; i++) {
! 255: legsup = pci_conf_read(sc->sc_pc, sc->sc_tag,
! 256: eecp);
! 257: if ((legsup & EHCI_LEGSUP_BIOSOWNED) == 0)
! 258: break;
! 259: DELAY(1000);
! 260: }
! 261: if (legsup & EHCI_LEGSUP_BIOSOWNED)
! 262: printf("%s: timed out waiting for BIOS\n",
! 263: sc->sc.sc_bus.bdev.dv_xname);
! 264: }
! 265: }
! 266: }
! 267:
! 268: void
! 269: ehci_pci_shutdown(void *v)
! 270: {
! 271: struct ehci_pci_softc *sc = (struct ehci_pci_softc *)v;
! 272:
! 273: ehci_shutdown(&sc->sc);
! 274: ehci_pci_givecontroller(sc);
! 275: }
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