sys/arch/vax/uba/uba_mainbus.c

   1 /*      $NetBSD: uba_mainbus.c,v 1.8 2005/12/11 12:19:36 christos Exp $    */
   2 /*
   3  * Copyright (c) 1982, 1986 The Regents of the University of California.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the University nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  *      @(#)uba.c       7.10 (Berkeley) 12/16/90
  31  *      @(#)autoconf.c  7.20 (Berkeley) 5/9/91
  32  */
  33
  34 /*
  35  * Copyright (c) 1996 Jonathan Stone.
  36  * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)uba.c       7.10 (Berkeley) 12/16/90
  67  *      @(#)autoconf.c  7.20 (Berkeley) 5/9/91
  68  */
  69
  70 #include <sys/cdefs.h>
  71 __KERNEL_RCSID(0, "$NetBSD: uba_mainbus.c,v 1.8 2005/12/11 12:19:36 christos Exp $");
  72
  73 #include <sys/param.h>
  74 #include <sys/device.h>
  75 #include <sys/systm.h>
  76
  77 #define _VAX_BUS_DMA_PRIVATE
  78 #include <machine/bus.h>
  79 #include <machine/mtpr.h>
  80 #include <machine/nexus.h>
  81 #include <machine/cpu.h>
  82 #include <machine/sgmap.h>
  83 #include <machine/mainbus.h>
  84
  85 #include <dev/qbus/ubavar.h>
  86
  87 #include <vax/uba/uba_common.h>
  88
  89 #include "ioconf.h"
  90
  91 /* Some Qbus-specific defines */
  92 #define QBASIZE (8192 * VAX_NBPG)
  93 #define QBAMAP  0x20088000
  94 #define QIOPAGE 0x20000000
  95
  96 /*
  97  * The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems.
  98  * It has an address space of 4MB (22 address bits), therefore the name,
  99  * and is hardware compatible with all 16 and 18 bits Q-bus devices.
 100  */
 101 static  int     qba_match(device_t, cfdata_t, void *);
 102 static  void    qba_attach(device_t, device_t, void *);
 103 static  void    qba_beforescan(struct uba_softc*);
 104 static  void    qba_init(struct uba_softc*);
 105
 106 CFATTACH_DECL_NEW(uba_mainbus, sizeof(struct uba_vsoftc),
 107     qba_match, qba_attach, NULL, NULL);
 108
 109 extern  struct vax_bus_space vax_mem_bus_space;
 110
 111 int
 112 qba_match(device_t parent, cfdata_t cf, void *aux)
 113 {
 114         struct mainbus_attach_args * const ma = aux;
 115
 116         return !strcmp(uba_cd.cd_name, ma->ma_type);
 117 }
 118
 119 void
 120 qba_attach(device_t parent, device_t self, void *aux)
 121 {
 122         struct mainbus_attach_args * const ma = aux;
 123         struct uba_vsoftc * const sc = device_private(self);
 124
 125         aprint_normal(": Q22\n");
 126
 127         sc->uv_sc.uh_dev = self;
 128         /*
 129          * Fill in bus specific data.
 130          */
 131         sc->uv_sc.uh_beforescan = qba_beforescan;
 132         sc->uv_sc.uh_ubainit = qba_init;
 133         sc->uv_sc.uh_iot = ma->ma_iot;
 134         sc->uv_sc.uh_dmat = &sc->uv_dmat;
 135
 136         /*
 137          * Fill in variables used by the sgmap system.
 138          */
 139         sc->uv_size = QBASIZE;  /* Size in bytes of Qbus space */
 140         sc->uv_addr = QBAMAP;   /* Physical address of map registers */
 141
 142         uba_dma_init(sc);
 143         uba_attach(&sc->uv_sc, QIOPAGE);
 144 }
 145
 146 /*
 147  * Called when the QBA is set up; to enable DMA access from
 148  * QBA devices to main memory.
 149  */
 150 void
 151 qba_beforescan(struct uba_softc *sc)
 152 {
 153 #define QIPCR   0x1f40
 154 #define Q_LMEAE 0x20
 155         bus_space_write_2(sc->uh_tag, sc->uh_ioh, QIPCR, Q_LMEAE);
 156 }
 157
 158 void
 159 qba_init(struct uba_softc *sc)
 160 {
 161         mtpr(0, PR_IUR);
 162         DELAY(500000);
 163         qba_beforescan(sc);
 164 }