sys/arch/powerpc/ibm4xx/dev/plb.c

   1 /* $NetBSD: plb.c,v 1.8.2.4 2005/11/10 13:58:26 skrll Exp $ */
   2
   3 /*
   4  * Copyright 2001 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  * 1. Redistributions of source code must retain the above copyright
  45  *    notice, this list of conditions and the following disclaimer.
  46  * 2. Redistributions in binary form must reproduce the above copyright
  47  *    notice, this list of conditions and the following disclaimer in the
  48  *    documentation and/or other materials provided with the distribution.
  49  * 3. All advertising materials mentioning features or use of this software
  50  *    must display the following acknowledgement:
  51  *      This product includes software developed by Christopher G. Demetriou
  52  *      for the NetBSD Project.
  53  * 4. The name of the author may not be used to endorse or promote products
  54  *    derived from this software without specific prior written permission
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  57  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  58  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  59  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  60  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  61  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  62  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  63  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  64  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  65  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  66  */
  67
  68 #include <sys/cdefs.h>
  69 __KERNEL_RCSID(0, "$NetBSD: plb.c,v 1.8.2.4 2005/11/10 13:58:26 skrll Exp $");
  70
  71 #include "locators.h"
  72
  73 #include <sys/param.h>
  74 #include <sys/systm.h>
  75 #include <sys/device.h>
  76 #include <sys/extent.h>
  77 #include <sys/malloc.h>
  78
  79 #define _POWERPC_BUS_DMA_PRIVATE
  80 #include <machine/bus.h>
  81
  82 #include <powerpc/ibm4xx/dev/plbvar.h>
  83 #include <powerpc/ibm4xx/ibm405gp.h>
  84
  85 /*
  86  * The devices that attach to the processor local bus on the 405GP CPU.
  87  */
  88 const struct plb_dev plb_devs [] = {
  89         { "cpu", },
  90         { "ecc", },
  91         { "opb", },
  92         { "pchb", },
  93         { NULL }
  94 };
  95
  96 static int      plb_match(struct device *, struct cfdata *, void *);
  97 static void     plb_attach(struct device *, struct device *, void *);
  98 static int      plb_print(void *, const char *);
  99
 100 CFATTACH_DECL(plb, sizeof(struct device),
 101     plb_match, plb_attach, NULL, NULL);
 102
 103 /*
 104  * "generic" DMA struct, nothing special.
 105  */
 106 struct powerpc_bus_dma_tag ibm4xx_default_bus_dma_tag = {
 107         0,                      /* _bounce_thresh */
 108         _bus_dmamap_create,
 109         _bus_dmamap_destroy,
 110         _bus_dmamap_load,
 111         _bus_dmamap_load_mbuf,
 112         _bus_dmamap_load_uio,
 113         _bus_dmamap_load_raw,
 114         _bus_dmamap_unload,
 115         _bus_dmamap_sync,
 116         _bus_dmamem_alloc,
 117         _bus_dmamem_free,
 118         _bus_dmamem_map,
 119         _bus_dmamem_unmap,
 120         _bus_dmamem_mmap,
 121         _bus_dma_phys_to_bus_mem_generic,
 122         _bus_dma_bus_mem_to_phys_generic,
 123 };
 124
 125 /*
 126  * Probe for the plb; always succeeds.
 127  */
 128 static int
 129 plb_match(struct device *parent, struct cfdata *cf, void *aux)
 130 {
 131
 132         return (1);
 133 }
 134
 135 /*
 136  * Attach the processor local bus.
 137  */
 138 static void
 139 plb_attach(struct device *parent, struct device *self, void *aux)
 140 {
 141         struct plb_attach_args paa;
 142         struct plb_dev *local_plb_devs = aux;
 143         int i;
 144
 145         printf("\n");
 146
 147         for (i = 0; plb_devs[i].plb_name != NULL; i++) {
 148                 paa.plb_name = plb_devs[i].plb_name;
 149                 paa.plb_dmat = &ibm4xx_default_bus_dma_tag;
 150                 paa.plb_irq = PLBCF_IRQ_DEFAULT;
 151
 152                 (void) config_found_ia(self, "plb", &paa, plb_print);
 153         }
 154
 155         while (local_plb_devs && local_plb_devs->plb_name != NULL) {
 156                 paa.plb_name = local_plb_devs->plb_name;
 157                 paa.plb_dmat = &ibm4xx_default_bus_dma_tag;
 158                 paa.plb_irq = PLBCF_IRQ_DEFAULT;
 159
 160                 (void) config_found_ia(self, "plb", &paa, plb_print);
 161                 local_plb_devs++;
 162         }
 163 }
 164
 165 static int
 166 plb_print(void *aux, const char *pnp)
 167 {
 168         struct plb_attach_args *paa = aux;
 169
 170         if (pnp)
 171                 aprint_normal("%s at %s", paa->plb_name, pnp);
 172         if (paa->plb_irq != PLBCF_IRQ_DEFAULT)
 173                 aprint_normal(" irq %d", paa->plb_irq);
 174
 175         return (UNCONF);
 176 }