sys/arch/sun3/dev/sebuf.c

   1 /*      $NetBSD: sebuf.c,v 1.16 2008/04/28 20:23:37 martin Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Gordon W. Ross.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Sun3/E SCSI/Ethernet board.  This is a VME board with some memory,
  34  * an Intel Ether, and an NCR5380 SCSI with a cheap DMA engine.
  35  * Note that the SCSI DMA engine can ONLY access the memory on
  36  * the SE board, NOT the main memory, because it can not master
  37  * VME transfers.
  38  *
  39  * This driver ("sebuf") is the parent of two child drivers:
  40  *   se: yet another variant of NCR 5380 SCSI H/W
  41  *   ie: yet anotehr variant of Intel 82586 Ethernet
  42  *
  43  * The job of this parent is to map the memory and partition it for
  44  * the two children.  This driver has no device nodes.
  45  */
  46
  47 #include <sys/cdefs.h>
  48 __KERNEL_RCSID(0, "$NetBSD: sebuf.c,v 1.16 2008/04/28 20:23:37 martin Exp $");
  49
  50 #include <sys/param.h>
  51 #include <sys/systm.h>
  52 #include <sys/conf.h>
  53 #include <sys/device.h>
  54 #include <sys/ioctl.h>
  55 #include <sys/malloc.h>
  56 #include <sys/mman.h>
  57 #include <sys/proc.h>
  58 #include <sys/tty.h>
  59
  60 #include <uvm/uvm_extern.h>
  61
  62 #include <machine/autoconf.h>
  63 #include <machine/cpu.h>
  64
  65 #include "sereg.h"
  66 #include "sevar.h"
  67
  68 struct sebuf_softc {
  69         device_t sc_dev;                /* base device (required) */
  70         struct sebuf_regs *sc_regs;
  71 };
  72
  73 /*
  74  * Autoconfig attachment
  75  */
  76
  77 static int  sebuf_match(device_t, cfdata_t, void *);
  78 static void sebuf_attach(device_t, device_t, void *);
  79 static int  sebuf_print(void *, const char *);
  80
  81 CFATTACH_DECL_NEW(sebuf, sizeof(struct sebuf_softc),
  82     sebuf_match, sebuf_attach, NULL, NULL);
  83
  84 static int
  85 sebuf_match(device_t parent, cfdata_t cf, void *args)
  86 {
  87         struct confargs *ca = args;
  88         struct se_regs *sreg;
  89         struct ie_regs *ereg;
  90         int pa, x;
  91
  92         if (ca->ca_paddr == -1)
  93                 return 0;
  94
  95         /* Is it there at all? */
  96         pa = ca->ca_paddr;
  97         x = bus_peek(ca->ca_bustype, pa, 2);
  98         if (x == -1)
  99                 return 0;
 100
 101         /* Look at the CSR for the SCSI part. */
 102         pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_scsi_regs);
 103         sreg = bus_tmapin(ca->ca_bustype, pa);
 104         /* Write some bits that are wired to zero. */
 105         sreg->se_csr = 0xFFF3;
 106         x = peek_word((void *)(&sreg->se_csr));
 107         bus_tmapout(sreg);
 108         if ((x == -1) || (x & 0xFCF0)) {
 109 #ifdef  DEBUG
 110                 aprint_debug("%s: SCSI csr=0x%x\n", __func__, x);
 111 #endif
 112                 return 0;
 113         }
 114
 115         /* Look at the CSR for the Ethernet part. */
 116         pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_eth_regs);
 117         ereg = bus_tmapin(ca->ca_bustype, pa);
 118         /* Write some bits that are wired to zero. */
 119         ereg->ie_csr = 0x0FFF;
 120         x = peek_word((void *)(&ereg->ie_csr));
 121         bus_tmapout(ereg);
 122         if ((x == -1) || (x & 0xFFF)) {
 123 #ifdef  DEBUG
 124                 printf("%s: Ether csr=0x%x\n", __func__, x);
 125 #endif
 126                 return 0;
 127         }
 128
 129         /* Default interrupt priority always splbio==2 */
 130         if (ca->ca_intpri == -1)
 131                 ca->ca_intpri = 2;
 132
 133         return 1;
 134 }
 135
 136 static void
 137 sebuf_attach(device_t parent, device_t self, void *args)
 138 {
 139         struct sebuf_softc *sc = device_private(self);
 140         struct confargs *ca = args;
 141         struct sebuf_attach_args aa;
 142         struct sebuf_regs *regs;
 143
 144         sc->sc_dev = self;
 145         aprint_normal("\n");
 146
 147         if (ca->ca_intpri != 2)
 148                 panic("sebuf: bad level");
 149
 150         /* Map in the whole board. */
 151         regs = (struct sebuf_regs *)bus_mapin(ca->ca_bustype, ca->ca_paddr,
 152             sizeof(struct sebuf_regs));
 153         if (regs == NULL)
 154                 panic("%s", __func__);
 155         sc->sc_regs = regs;
 156
 157         /* Attach the SCSI child. */
 158         aa.ca = *ca;    /* structure copy */
 159         aa.ca.ca_paddr = 0; /* prevent misuse */
 160         aa.name = "se";
 161         aa.buf  = &regs->se_scsi_buf[0];
 162         aa.blen = SE_NCRBUFSIZE;
 163         aa.regs = &regs->se_scsi_regs;
 164         (void)config_found(self, (void *)&aa, sebuf_print);
 165
 166         /* Attach the Ethernet child. */
 167         aa.ca.ca_intpri++;
 168         aa.ca.ca_intvec++;
 169         aa.name = "ie";
 170         aa.buf  = &regs->se_eth_buf[0];
 171         aa.blen = SE_IEBUFSIZE;
 172         aa.regs = &regs->se_eth_regs;
 173         (void)config_found(self, (void *)&aa, sebuf_print);
 174 }
 175
 176 static int
 177 sebuf_print(void *aux, const char *name)
 178 {
 179
 180         if (name != NULL)
 181                 aprint_normal("%s: ", name);
 182
 183         return UNCONF;
 184 }