164 lines
5.0 KiB
C
164 lines
5.0 KiB
C
/* $NetBSD: iop_pci.c,v 1.7 2001/11/13 07:48:45 lukem Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* PCI front-end for `iop' driver.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: iop_pci.c,v 1.7 2001/11/13 07:48:45 lukem Exp $");
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#include "opt_i2o.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/queue.h>
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#include <sys/proc.h>
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#include <machine/endian.h>
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#include <machine/bus.h>
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#include <dev/pci/pcidevs.h>
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#include <dev/pci/pcivar.h>
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#include <dev/i2o/i2o.h>
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#include <dev/i2o/iopreg.h>
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#include <dev/i2o/iopio.h>
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#include <dev/i2o/iopvar.h>
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#define PCI_INTERFACE_I2O_POLLED 0x00
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#define PCI_INTERFACE_I2O_INTRDRIVEN 0x01
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static void iop_pci_attach(struct device *, struct device *, void *);
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static int iop_pci_match(struct device *, struct cfdata *, void *);
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struct cfattach iop_pci_ca = {
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sizeof(struct iop_softc), iop_pci_match, iop_pci_attach
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};
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static int
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iop_pci_match(struct device *parent, struct cfdata *match, void *aux)
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{
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struct pci_attach_args *pa;
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pa = aux;
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/*
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* Look for an "intelligent I/O processor" that adheres to the I2O
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* specification. Ignore the device if it doesn't support interrupt
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* driven operation.
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*/
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if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O &&
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PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD &&
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PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN)
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return (1);
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return (0);
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}
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static void
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iop_pci_attach(struct device *parent, struct device *self, void *aux)
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{
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struct pci_attach_args *pa;
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struct iop_softc *sc;
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pci_chipset_tag_t pc;
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pci_intr_handle_t ih;
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const char *intrstr;
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pcireg_t reg;
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int i;
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sc = (struct iop_softc *)self;
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pa = (struct pci_attach_args *)aux;
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pc = pa->pa_pc;
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printf(": ");
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/*
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* The kernel always uses the first memory mapping to communicate
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* with the IOP.
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*/
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for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) {
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reg = pci_conf_read(pc, pa->pa_tag, i);
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if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) {
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sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg);
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break;
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}
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}
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if (i == PCI_MAPREG_END) {
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printf("can't find mapping\n");
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return;
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}
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/* Map the register window. */
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if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot,
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&sc->sc_ioh, NULL, NULL)) {
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printf("%s: can't map register window\n", sc->sc_dv.dv_xname);
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return;
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}
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sc->sc_pcibus = pa->pa_bus;
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sc->sc_pcidev = pa->pa_device;
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sc->sc_dmat = pa->pa_dmat;
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sc->sc_bus_memt = pa->pa_memt;
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sc->sc_bus_iot = pa->pa_iot;
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/* Enable the device. */
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reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
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pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
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reg | PCI_COMMAND_MASTER_ENABLE);
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/* Map and establish the interrupt. XXX IPL_BIO. */
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if (pci_intr_map(pa, &ih)) {
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printf("can't map interrupt\n");
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return;
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}
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intrstr = pci_intr_string(pc, ih);
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sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc);
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if (sc->sc_ih == NULL) {
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printf("can't establish interrupt");
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if (intrstr != NULL)
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printf(" at %s", intrstr);
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printf("\n");
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return;
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}
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/* Attach to the bus-independent code. */
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iop_init(sc, intrstr);
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}
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