FreeBSD/Linux Kernel Cross Reference
sys/mips/malta/obio.c

     /*      $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $  */
     
     /*-
      * SPDX-License-Identifier: BSD-4-Clause
      *
      * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
      * All rights reserved.
      *
      * Written by Jason R. Thorpe for Wasabi Systems, Inc.
     *
     * 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 for the NetBSD Project by
     *      Wasabi Systems, Inc.
     * 4. The name of Wasabi Systems, Inc. may not be used to endorse
     *    or promote products derived from this software without specific prior
     *    written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
     * 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.
     */
    
    /*
     * On-board device autoconfiguration support for Intel IQ80321
     * evaluation boards.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    #include <sys/malloc.h>
    
    #include <machine/bus.h>
    
    #include <mips/malta/maltareg.h>
    #include <mips/malta/obiovar.h>
    
    int     obio_probe(device_t);
    int     obio_attach(device_t);
    
    /*
     * A bit tricky and hackish. Since we need OBIO to rely
     * on PCI we make it pseudo-pci device. But there should 
     * be only one such device, so we use this static flag 
     * to prevent false positives on every real PCI device probe.
     */
    static int have_one = 0;
    
    int
    obio_probe(device_t dev)
    {
            if (!have_one) {
                    have_one = 1;
                    return 0;
            }
            return (ENXIO);
    }
    
    int
    obio_attach(device_t dev)
    {
            struct obio_softc *sc = device_get_softc(dev);
    
            sc->oba_st = mips_bus_space_generic;
            sc->oba_addr = MIPS_PHYS_TO_KSEG1(MALTA_UART0ADR);
            sc->oba_size = MALTA_PCIMEM3_SIZE;
            sc->oba_rman.rm_type = RMAN_ARRAY;
            sc->oba_rman.rm_descr = "OBIO I/O";
            if (rman_init(&sc->oba_rman) != 0 ||
                rman_manage_region(&sc->oba_rman,
                sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
                    panic("obio_attach: failed to set up I/O rman");
            sc->oba_irq_rman.rm_type = RMAN_ARRAY;
            sc->oba_irq_rman.rm_descr = "OBIO IRQ";
    
            /* 
            * This module is intended for UART purposes only and
            * it's IRQ is 4
            */
           if (rman_init(&sc->oba_irq_rman) != 0 ||
               rman_manage_region(&sc->oba_irq_rman, 4, 4) != 0)
                   panic("obio_attach: failed to set up IRQ rman");
   
           device_add_child(dev, "uart", 0);
           bus_generic_probe(dev);
           bus_generic_attach(dev);
   
           return (0);
   }
   
   static struct resource *
   obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
       rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
   {
           struct resource *rv;
           struct rman *rm;
           bus_space_tag_t bt = 0;
           bus_space_handle_t bh = 0;
           struct obio_softc *sc = device_get_softc(bus);
   
           switch (type) {
           case SYS_RES_IRQ:
                   rm = &sc->oba_irq_rman;
                   break;
           case SYS_RES_MEMORY:
                   return (NULL);
           case SYS_RES_IOPORT:
                   rm = &sc->oba_rman;
                   bt = sc->oba_st;
                   bh = sc->oba_addr;
                   start = bh;
                   break;
           default:
                   return (NULL);
           }
   
           rv = rman_reserve_resource(rm, start, end, count, flags, child);
           if (rv == NULL) 
                   return (NULL);
           if (type == SYS_RES_IRQ)
                   return (rv);
           rman_set_rid(rv, *rid);
           rman_set_bustag(rv, bt);
           rman_set_bushandle(rv, bh);
   
           if (0) {
                   if (bus_activate_resource(child, type, *rid, rv)) {
                           rman_release_resource(rv);
                           return (NULL);
                   }
           }
           return (rv);
   
   }
   
   static int
   obio_activate_resource(device_t bus, device_t child, int type, int rid,
       struct resource *r)
   {
           return (0);
   }
   static device_method_t obio_methods[] = {
           DEVMETHOD(device_probe, obio_probe),
           DEVMETHOD(device_attach, obio_attach),
   
           DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
           DEVMETHOD(bus_activate_resource, obio_activate_resource),
           DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
           DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   
           {0, 0},
   };
   
   static driver_t obio_driver = {
           "obio",
           obio_methods,
           sizeof(struct obio_softc),
   };
   static devclass_t obio_devclass;
   
   DRIVER_MODULE(obio, pci, obio_driver, obio_devclass, 0, 0);

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