sys/arch/arm/omap/omap_tipb.c

   1 /*      $NetBSD: omap_tipb.c,v 1.3 2008/11/21 17:13:07 matt Exp $ */
   2
   3 /*
   4  * Autoconfiguration support for the Texas Instruments OMAP TIPB.
   5  * Based on arm/xscale/pxa2x0.c which in turn was derived from
   6  * arm/sa11x0/sa11x0.c.  The code to do the early attach was initially derived
   7  * from arch/sparc/dev/obio.c.
   8  *
   9  * Copyright (c) 2002, 2005  Genetec Corporation.  All rights reserved.
  10  * Written by Hiroyuki Bessho for Genetec Corporation.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed for the NetBSD Project by
  23  *      Genetec Corporation.
  24  * 4. The name of Genetec Corporation may not be used to endorse or
  25  *    promote products derived from this software without specific prior
  26  *    written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GENETEC CORPORATION
  32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38  * POSSIBILITY OF SUCH DAMAGE.
  39  *
  40  * Copyright (c) 1997, 1998, 2001, The NetBSD Foundation, Inc.
  41  * All rights reserved.
  42  *
  43  * This code is derived from software contributed to The NetBSD Foundation
  44  * by IWAMOTO Toshihiro, Ichiro FUKUHARA and Paul Kranenburg.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  56  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  57  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  58  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  59  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  60  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  61  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  62  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  63  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  64  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  65  * POSSIBILITY OF SUCH DAMAGE.
  66  *
  67  * Copyright (c) 1999
  68  *         Shin Takemura and PocketBSD Project. All rights reserved.
  69  *
  70  * Redistribution and use in source and binary forms, with or without
  71  * modification, are permitted provided that the following conditions
  72  * are met:
  73  * 1. Redistributions of source code must retain the above copyright
  74  *    notice, this list of conditions and the following disclaimer.
  75  * 2. Redistributions in binary form must reproduce the above copyright
  76  *    notice, this list of conditions and the following disclaimer in the
  77  *    documentation and/or other materials provided with the distribution.
  78  * 3. All advertising materials mentioning features or use of this software
  79  *    must display the following acknowledgement:
  80  *      This product includes software developed by the PocketBSD project
  81  *      and its contributors.
  82  * 4. Neither the name of the project nor the names of its contributors
  83  *    may be used to endorse or promote products derived from this software
  84  *    without specific prior written permission.
  85  *
  86  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  87  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  88  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  89  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  90  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  91  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  92  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  93  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  94  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  95  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  96  * SUCH DAMAGE.
  97  */
  98
  99 #include <sys/cdefs.h>
 100 __KERNEL_RCSID(0, "$NetBSD: omap_tipb.c,v 1.3 2008/11/21 17:13:07 matt Exp $");
 101
 102 #include "locators.h"
 103
 104 #include <sys/param.h>
 105 #include <sys/systm.h>
 106 #include <sys/device.h>
 107 #include <sys/kernel.h>
 108 #include <sys/reboot.h>
 109
 110 #include <machine/cpu.h>
 111 #include <machine/bus.h>
 112
 113 #include <arm/cpufunc.h>
 114 #include <arm/mainbus/mainbus.h>
 115 #include <arm/omap/omap_reg.h>
 116 #include <arm/omap/omap_tipb.h>
 117
 118 struct tipb_softc {
 119         device_t sc_dev;
 120         bus_dma_tag_t sc_dmac;
 121 };
 122
 123 /* prototypes */
 124 static int      tipb_match(device_t, cfdata_t, void *);
 125 static void     tipb_attach(device_t, device_t, void *);
 126 static int      tipb_search(device_t, cfdata_t, const int *, void *);
 127 static int      tipb_print(void *, const char *);
 128
 129 /* attach structures */
 130 CFATTACH_DECL_NEW(tipb, sizeof(struct tipb_softc),
 131     tipb_match, tipb_attach, NULL, NULL);
 132
 133 static int tipb_attached;
 134
 135 /*
 136  * There are some devices that need to be set up before all the others.  The
 137  * earlies array contains their names.  tipb_attach() and tipb_search() work
 138  * together to attach these devices in the order they appear in this array
 139  * before any other TIPB devices are attached.
 140  */
 141 static const char * const earlies[] = {
 142         OMAP_INTC_DEVICE,
 143         "omapmputmr",
 144         NULL
 145 };
 146
 147 static int
 148 tipb_match(device_t parent, cfdata_t match, void *aux)
 149 {
 150         if (tipb_attached)
 151                 return 0;
 152         return 1;
 153 }
 154
 155 static void
 156 tipb_attach(device_t parent, device_t self, void *aux)
 157 {
 158         struct tipb_softc *sc = device_private(self);
 159
 160         tipb_attached = 1;
 161
 162 #if NOMAPDMAC > 0
 163 #error DMA not implemented
 164         sc->sc_dmac = &omap_bus_dma_tag;
 165 #else
 166         sc->sc_dmac = NULL;
 167 #endif
 168
 169         aprint_normal(": Texas Instruments Peripheral Bus\n");
 170         aprint_naive("\n");
 171
 172         /*
 173          * There are some devices that need to be set up before all the
 174          * others.  The earlies array contains their names.  Find them and
 175          * attach them in the order they appear in the array.
 176          */
 177         const char *const *earlyp;
 178         for (earlyp = earlies; *earlyp != NULL; earlyp++)
 179                 /*
 180                  * The bus search function is passed an aux argument that
 181                  * "describes the device that has been found".  The type of it
 182                  * is void *.  However, I want to pass a constant string, so
 183                  * use __UNCONST to convince the compiler that this is ok.
 184                  */
 185                 config_search_ia(tipb_search, self, "tipb",
 186                                  __UNCONST(*earlyp));
 187
 188         /*
 189          * Attach all other devices
 190          */
 191         config_search_ia(tipb_search, self, "tipb", NULL);
 192 }
 193
 194 static int
 195 tipb_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
 196 {
 197         struct tipb_softc *sc = device_private(parent);
 198         struct tipb_attach_args aa;
 199         const char *const name = (const char *const)aux;
 200
 201         /* Check whether we're looking for a specifically named device */
 202         if (name != NULL && strcmp(name, cf->cf_name) != 0)
 203                 return (0);
 204
 205         switch (cf->cf_loc[TIPBCF_MULT]) {
 206         case 1:
 207                 aa.tipb_iot = &omap_bs_tag;
 208                 break;
 209         case 2:
 210                 aa.tipb_iot = &omap_a2x_bs_tag;
 211                 break;
 212         case 4:
 213                 aa.tipb_iot = &omap_a4x_bs_tag;
 214                 break;
 215         default:
 216                 panic("Unsupported TIPB multiplier.");
 217                 break;
 218         }
 219         aa.tipb_dmac = sc->sc_dmac;
 220         aa.tipb_addr = cf->cf_loc[TIPBCF_ADDR];
 221         aa.tipb_size = cf->cf_loc[TIPBCF_SIZE];
 222         aa.tipb_intr = cf->cf_loc[TIPBCF_INTR];
 223         aa.tipb_mult = cf->cf_loc[TIPBCF_MULT];
 224
 225         if (config_match(parent, cf, &aa))
 226                 config_attach(parent, cf, &aa, tipb_print);
 227
 228         return 0;
 229 }
 230
 231 static int
 232 tipb_print(void *aux, const char *name)
 233 {
 234         struct tipb_attach_args *sa = (struct tipb_attach_args*)aux;
 235
 236         if (sa->tipb_addr != TIPBCF_ADDR_DEFAULT) {
 237                 aprint_normal(" addr 0x%08lx", sa->tipb_addr);
 238                 if (sa->tipb_size > TIPBCF_SIZE_DEFAULT)
 239                         aprint_normal("-0x%08lx", sa->tipb_addr + sa->tipb_size-1);
 240         }
 241         if (sa->tipb_intr != TIPBCF_INTR_DEFAULT)
 242                 aprint_normal(" intr %d", sa->tipb_intr);
 243
 244         return (UNCONF);
 245 }