sys/dev/marvell/obio.c

   1 /*      $NetBSD: obio.c,v 1.11 2009/05/12 12:18:45 cegger Exp $ */
   2
   3 /*
   4  * Copyright (c) 2002 Allegro Networks, Inc., Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed for the NetBSD Project by
  18  *      Allegro Networks, Inc., and Wasabi Systems, Inc.
  19  * 4. The name of Allegro Networks, Inc. may not be used to endorse
  20  *    or promote products derived from this software without specific prior
  21  *    written permission.
  22  * 5. The name of Wasabi Systems, Inc. may not be used to endorse
  23  *    or promote products derived from this software without specific prior
  24  *    written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY ALLEGRO NETWORKS, INC. AND
  27  * WASABI SYSTEMS, INC. ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  28  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  29  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  30  * IN NO EVENT SHALL EITHER ALLEGRO NETWORKS, INC. OR WASABI SYSTEMS, INC.
  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  * gt.c -- GT system controller driver
  42  */
  43
  44 #include <sys/cdefs.h>
  45 __KERNEL_RCSID(0, "$NetBSD: obio.c,v 1.11 2009/05/12 12:18:45 cegger Exp $");
  46
  47 #include "opt_marvell.h"
  48
  49 #include <sys/param.h>
  50 #include <sys/types.h>
  51 #include <sys/extent.h>
  52 #include <sys/device.h>
  53 #include <sys/kernel.h>
  54 #include <sys/malloc.h>
  55
  56 #define _BUS_SPACE_PRIVATE
  57 #define _BUS_DMA_PRIVATE
  58 #include <sys/bus.h>
  59
  60 #include <powerpc/spr.h>
  61 #include <powerpc/oea/hid.h>
  62
  63 #include <dev/pci/pcivar.h>
  64 #include <dev/marvell/gtreg.h>
  65 #include <dev/marvell/gtvar.h>
  66
  67 #ifdef DEBUG
  68 #include <sys/systm.h>  /* for Debugger() */
  69 #endif
  70
  71 #include "locators.h"
  72
  73 static int obio_cfprint(void *, const char *);
  74 static int obio_cfmatch(device_t, cfdata_t, void *);
  75 static int obio_cfsearch(device_t, cfdata_t,
  76                          const int *, void *);
  77 static void obio_cfattach(device_t, device_t, void *);
  78
  79 struct obio_softc {
  80         struct device sc_dev;
  81         bus_space_tag_t sc_memt;
  82         bus_space_tag_t sc_gt_memt;
  83         bus_space_tag_t sc_gt_memh;
  84 };
  85
  86 CFATTACH_DECL(obio, sizeof(struct obio_softc),
  87     obio_cfmatch, obio_cfattach, NULL, NULL);
  88
  89 extern struct cfdriver obio_cd;
  90
  91 static const struct {
  92     bus_addr_t low_decode;
  93     bus_addr_t high_decode;
  94 } obio_info[5] = {
  95     { GT_CS0_Low_Decode, GT_CS0_High_Decode, },
  96     { GT_CS1_Low_Decode, GT_CS1_High_Decode, },
  97     { GT_CS2_Low_Decode, GT_CS2_High_Decode, },
  98     { GT_CS3_Low_Decode, GT_CS3_High_Decode, },
  99     { GT_BootCS_Low_Decode, GT_BootCS_High_Decode, },
 100 };
 101
 102 extern bus_space_tag_t obio_bs_tags[5];
 103
 104 int
 105 obio_cfprint(void *aux, const char *pnp)
 106 {
 107         struct obio_attach_args *oa = aux;
 108
 109         if (pnp) {
 110                 aprint_normal("%s at %s", oa->oa_name, pnp);
 111         }
 112         aprint_normal(" offset %#x size %#x", oa->oa_offset, oa->oa_size);
 113         if (oa->oa_irq != OBIOCF_IRQ_DEFAULT)
 114                 aprint_normal(" irq %d", oa->oa_irq);
 115
 116         return (UNCONF);
 117 }
 118
 119
 120 int
 121 obio_cfsearch(device_t parent, cfdata_t cf,
 122               const int *ldesc, void *aux)
 123 {
 124         struct obio_softc *sc = (struct obio_softc *) parent;
 125         struct obio_attach_args oa;
 126
 127         oa.oa_name = cf->cf_name;
 128         oa.oa_memt = sc->sc_memt;
 129         oa.oa_offset = cf->cf_loc[OBIOCF_OFFSET];
 130         oa.oa_size = cf->cf_loc[OBIOCF_SIZE];
 131         oa.oa_irq = cf->cf_loc[OBIOCF_IRQ];
 132
 133         if (config_match(parent, cf, &oa) > 0)
 134                 config_attach(parent, cf, &oa, obio_cfprint);
 135
 136         return (0);
 137 }
 138
 139 int
 140 obio_cfmatch(device_t parent, cfdata_t cf, void *aux)
 141 {
 142         struct gt_softc * const gt = (struct gt_softc *)parent;
 143         struct gt_attach_args * const ga = aux;
 144
 145         return GT_OBIOOK(gt, ga, &obio_cd);
 146 }
 147
 148 void
 149 obio_cfattach(device_t parent, device_t self, void *aux)
 150 {
 151         struct gt_softc * const gt = device_private(parent);
 152         struct obio_softc *sc = device_private(self);
 153         struct gt_attach_args *ga = aux;
 154         uint32_t datal, datah;
 155
 156         GT_OBIOFOUND(gt, ga);
 157
 158         datal = bus_space_read_4(ga->ga_memt, ga->ga_memh,
 159             obio_info[ga->ga_unit].low_decode);
 160         datah = bus_space_read_4(ga->ga_memt, ga->ga_memh,
 161             obio_info[ga->ga_unit].high_decode);
 162
 163         if (GT_LowAddr_GET(datal) > GT_HighAddr_GET(datah)) {
 164                 aprint_normal(": disabled\n");
 165                 return;
 166         }
 167
 168         sc->sc_memt = obio_bs_tags[ga->ga_unit];
 169         if (sc->sc_memt == NULL) {
 170                 aprint_normal(": unused\n");
 171                 return;
 172         }
 173
 174         aprint_normal(": addr %#x-%#x, %s-endian\n",
 175             GT_LowAddr_GET(datal), GT_HighAddr_GET(datah),
 176             GT_PCISwap_GET(datal) == 1 ? "little" : "big");
 177
 178         config_search_ia(obio_cfsearch, &sc->sc_dev, "obio", NULL);
 179 }