Annotation of sys/dev/pci/iop_pci.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: iop_pci.c,v 1.5 2005/08/09 04:10:12 mickey Exp $ */
! 2: /* $NetBSD: iop_pci.c,v 1.4 2001/03/20 13:21:00 ad Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 2000 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Andrew Doran.
! 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: /*
! 41: * PCI front-end for `iop' driver.
! 42: */
! 43:
! 44: #include <sys/param.h>
! 45: #include <sys/systm.h>
! 46: #include <sys/kernel.h>
! 47: #include <sys/device.h>
! 48: #include <sys/queue.h>
! 49: #include <sys/proc.h>
! 50:
! 51: #include <machine/endian.h>
! 52: #include <machine/bus.h>
! 53:
! 54: #include <dev/pci/pcidevs.h>
! 55: #include <dev/pci/pcivar.h>
! 56:
! 57: #include <dev/i2o/i2o.h>
! 58: #include <dev/i2o/iopreg.h>
! 59: #include <dev/i2o/iopio.h>
! 60: #include <dev/i2o/iopvar.h>
! 61:
! 62: #define PCI_INTERFACE_I2O_POLLED 0x00
! 63: #define PCI_INTERFACE_I2O_INTRDRIVEN 0x01
! 64:
! 65: void iop_pci_attach(struct device *, struct device *, void *);
! 66: int iop_pci_match(struct device *, void *, void *);
! 67:
! 68: struct cfattach iop_pci_ca = {
! 69: sizeof(struct iop_softc), iop_pci_match, iop_pci_attach
! 70: };
! 71:
! 72: int
! 73: iop_pci_match(parent, match, aux)
! 74: struct device *parent;
! 75: void *match;
! 76: void *aux;
! 77: {
! 78: struct pci_attach_args *pa;
! 79:
! 80: pa = aux;
! 81:
! 82: /*
! 83: * Look for an "intelligent I/O processor" that adheres to the I2O
! 84: * specification. Ignore the device if it doesn't support interrupt
! 85: * driven operation.
! 86: */
! 87: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O &&
! 88: PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD &&
! 89: PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN)
! 90: return (1);
! 91:
! 92: return (0);
! 93: }
! 94:
! 95: void
! 96: iop_pci_attach(struct device *parent, struct device *self, void *aux)
! 97: {
! 98: struct pci_attach_args *pa;
! 99: struct iop_softc *sc;
! 100: pci_chipset_tag_t pc;
! 101: pci_intr_handle_t ih;
! 102: const char *intrstr;
! 103: pcireg_t reg;
! 104: int i;
! 105:
! 106: sc = (struct iop_softc *)self;
! 107: pa = (struct pci_attach_args *)aux;
! 108: pc = pa->pa_pc;
! 109: printf(": ");
! 110:
! 111: /*
! 112: * The kernel always uses the first memory mapping to communicate
! 113: * with the IOP.
! 114: */
! 115: for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) {
! 116: reg = pci_conf_read(pc, pa->pa_tag, i);
! 117: if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM)
! 118: break;
! 119: }
! 120: if (i == PCI_MAPREG_END) {
! 121: printf("can't find mapping\n");
! 122: return;
! 123: }
! 124:
! 125: /* Map the register window. */
! 126: if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot,
! 127: &sc->sc_ioh, NULL, NULL, 0x40000)) {
! 128: printf("%s: can't map register window\n", sc->sc_dv.dv_xname);
! 129: return;
! 130: }
! 131:
! 132: sc->sc_dmat = pa->pa_dmat;
! 133: sc->sc_bus_memt = pa->pa_memt;
! 134: sc->sc_bus_iot = pa->pa_iot;
! 135:
! 136: /* Map and establish the interrupt. XXX IPL_BIO. */
! 137: if (pci_intr_map(pa, &ih)) {
! 138: printf("can't map interrupt\n");
! 139: return;
! 140: }
! 141: intrstr = pci_intr_string(pc, ih);
! 142: sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc,
! 143: sc->sc_dv.dv_xname);
! 144: if (sc->sc_ih == NULL) {
! 145: printf("can't establish interrupt");
! 146: if (intrstr != NULL)
! 147: printf(" at %s", intrstr);
! 148: printf("\n");
! 149: return;
! 150: }
! 151:
! 152: /* Attach to the bus-independent code. */
! 153: iop_init(sc, intrstr);
! 154: }
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