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

   1 /* $NetBSD: opb.c,v 1.22 2006/02/21 04:25:29 thorpej Exp $ */
   2
   3 /*
   4  * Copyright 2001,2002 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: opb.c,v 1.22 2006/02/21 04:25:29 thorpej 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
  78 #include <powerpc/spr.h>
  79 #include <powerpc/ibm4xx/dev/opbvar.h>
  80 #include <powerpc/ibm4xx/dev/plbvar.h>
  81 #include <powerpc/ibm4xx/ibm405gp.h>
  82
  83 /*
  84  * The devices on the On-chip Peripheral Bus to the 405GP CPU.
  85  */
  86 const struct opb_dev {
  87         int pvr;
  88         const char *name;
  89         bus_addr_t addr;
  90         int instance;
  91         int irq;
  92 } opb_devs [] = {
  93         /* IBM405GP */
  94         { IBM405GP,     "com",  IBM405GP_UART0_BASE,     0, 0 },
  95         { IBM405GP,     "com",  IBM405GP_UART1_BASE,     1, 1 },
  96         { IBM405GP,     "emac", IBM405GP_EMAC0_BASE,     0, 9 }, /* XXX: really irq 9..15 */
  97         { IBM405GP,     "opbgpio",      IBM405GP_GPIO0_BASE,    0, -1 },
  98         { IBM405GP,     "gpiic",IBM405GP_IIC0_BASE,     0,  2 },
  99         { IBM405GP,     "wdog", -1,                     0, -1 },
 100
 101         /* IBM405GPR */
 102         { IBM405GPR,    "com",  IBM405GP_UART0_BASE,     0, 0 },
 103         { IBM405GPR,    "com",  IBM405GP_UART1_BASE,     1, 1 },
 104         { IBM405GPR,    "emac", IBM405GP_EMAC0_BASE,     0, 9 }, /* XXX: really irq 9..15 */
 105         { IBM405GPR,    "opbgpio",      IBM405GP_GPIO0_BASE,    0, -1 },
 106         { IBM405GPR,    "gpiic",IBM405GP_IIC0_BASE,     0, 2 },
 107         { IBM405GPR,    "wdog", -1,                     0, -1 },
 108         { 0,             NULL }
 109 };
 110
 111 const struct opb_limit {
 112         int pvr;
 113         bus_addr_t base;
 114         bus_addr_t limit;
 115 } opb_limits[] = {
 116         { IBM405GP,     IBM405GP_UART0_BASE,    IBM405GP_UART0_BASE + 0xfff },
 117         { IBM405GPR,    IBM405GP_UART0_BASE,    IBM405GP_UART0_BASE + 0xfff },
 118         { 0,            0,                      0 }
 119 };
 120
 121 static int      opb_match(struct device *, struct cfdata *, void *);
 122 static void     opb_attach(struct device *, struct device *, void *);
 123 static int      opb_submatch(struct device *, struct cfdata *,
 124                              const int *, void *);
 125 static int      opb_print(void *, const char *);
 126
 127 CFATTACH_DECL(opb, sizeof(struct device),
 128     opb_match, opb_attach, NULL, NULL);
 129
 130 static struct powerpc_bus_space opb_tag = {
 131         _BUS_SPACE_BIG_ENDIAN|_BUS_SPACE_MEM_TYPE,
 132         0x0, IBM405GP_UART0_BASE, 0x1000
 133 };
 134 static char ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)]
 135     __attribute__((aligned(8)));
 136 static int opb_tag_init_done;
 137
 138 /*
 139  * Probe for the opb; always succeeds.
 140  */
 141 static int
 142 opb_match(struct device *parent, struct cfdata *cf, void *aux)
 143 {
 144         struct opb_attach_args *oaa = aux;
 145
 146         /* match only opb devices */
 147         if (strcmp(oaa->opb_name, cf->cf_name) != 0)
 148                 return (0);
 149
 150         return (1);
 151 }
 152
 153 static int
 154 opb_submatch(struct device *parent, struct cfdata *cf,
 155              const int *ldesc, void *aux)
 156 {
 157         struct opb_attach_args *oaa = aux;
 158
 159         if (cf->cf_loc[OPBCF_ADDR] != OPBCF_ADDR_DEFAULT &&
 160             cf->cf_loc[OPBCF_ADDR] != oaa->opb_addr)
 161                 return (0);
 162
 163         return (config_match(parent, cf, aux));
 164 }
 165
 166 /*
 167  * Attach the on-chip peripheral bus.
 168  */
 169 static void
 170 opb_attach(struct device *parent, struct device *self, void *aux)
 171 {
 172         struct plb_attach_args *paa = aux;
 173         struct opb_attach_args oaa;
 174         bus_space_tag_t tag;
 175         int i, pvr;
 176
 177         printf("\n");
 178         pvr = mfpvr() >> 16;
 179
 180         tag = opb_get_bus_space_tag();
 181
 182         for (i = 0; opb_devs[i].name != NULL; i++) {
 183                 if (opb_devs[i].pvr != pvr)
 184                         continue;
 185                 oaa.opb_name = opb_devs[i].name;
 186                 oaa.opb_addr = opb_devs[i].addr;
 187                 oaa.opb_instance = opb_devs[i].instance;
 188                 oaa.opb_irq = opb_devs[i].irq;
 189                 oaa.opb_bt = tag;
 190                 oaa.opb_dmat = paa->plb_dmat;
 191
 192                 (void) config_found_sm_loc(self, "opb", NULL, &oaa, opb_print,
 193                                            opb_submatch);
 194         }
 195 }
 196
 197 static int
 198 opb_print(void *aux, const char *pnp)
 199 {
 200         struct opb_attach_args *oaa = aux;
 201
 202         if (pnp)
 203                 aprint_normal("%s at %s", oaa->opb_name, pnp);
 204
 205         if (oaa->opb_addr != OPBCF_ADDR_DEFAULT)
 206                 aprint_normal(" addr 0x%08lx", oaa->opb_addr);
 207         if (oaa->opb_irq != OPBCF_IRQ_DEFAULT)
 208                 aprint_normal(" irq %d", oaa->opb_irq);
 209
 210         return (UNCONF);
 211 }
 212
 213 bus_space_tag_t
 214 opb_get_bus_space_tag(void)
 215 {
 216         int i, pvr;
 217
 218         if (!opb_tag_init_done) {
 219                 pvr = mfpvr() >> 16;
 220
 221                 for (i = 0; opb_limits[i].pvr && opb_limits[i].pvr != pvr; i++)
 222                         ;
 223                 if (opb_limits[i].pvr == 0)
 224                         panic("opb_get_bus_space_tag: no limits for this CPU!");
 225
 226                 opb_tag.pbs_base = opb_limits[i].base;
 227                 opb_tag.pbs_limit = opb_limits[i].limit;
 228
 229                 if (bus_space_init(&opb_tag, "opbtag",
 230                     ex_storage, sizeof(ex_storage)))
 231                         panic("opb_attach: Failed to initialise opb_tag");
 232                 opb_tag_init_done = 1;
 233         }
 234
 235         return (&opb_tag);
 236 }