sebuf.c revision 1.11
1 /* $NetBSD: sebuf.c,v 1.11 2003/01/01 02:26:13 thorpej 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Sun3/E SCSI/Ethernet board. This is a VME board with some memory, 41 * an Intel Ether, and an NCR5380 SCSI with a cheap DMA engine. 42 * Note that the SCSI DMA engine can ONLY access the memory on 43 * the SE board, NOT the main memory, because it can not master 44 * VME transfers. 45 * 46 * This driver ("sebuf") is the parent of two child drivers: 47 * se: yet another variant of NCR 5380 SCSI H/W 48 * ie: yet anotehr variant of Intel 82586 Ethernet 49 * 50 * The job of this parent is to map the memory and partition it for 51 * the two children. This driver has no device nodes. 52 */ 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/conf.h> 57 #include <sys/device.h> 58 #include <sys/ioctl.h> 59 #include <sys/malloc.h> 60 #include <sys/mman.h> 61 #include <sys/proc.h> 62 #include <sys/tty.h> 63 64 #include <uvm/uvm_extern.h> 65 66 #include <machine/autoconf.h> 67 #include <machine/cpu.h> 68 69 #include "sereg.h" 70 #include "sevar.h" 71 72 struct sebuf_softc { 73 struct device sc_dev; /* base device (required) */ 74 struct sebuf_regs *sc_regs; 75 }; 76 77 /* 78 * Autoconfig attachment 79 */ 80 81 static int sebuf_match __P((struct device *, struct cfdata *, void *)); 82 static void sebuf_attach __P((struct device *, struct device *, void *)); 83 static int sebuf_print __P((void *, const char *)); 84 85 CFATTACH_DECL(sebuf, sizeof(struct sebuf_softc), 86 sebuf_match, sebuf_attach, NULL, NULL); 87 88 static int 89 sebuf_match(parent, cf, args) 90 struct device *parent; 91 struct cfdata *cf; 92 void *args; 93 { 94 struct confargs *ca = args; 95 struct se_regs *sreg; 96 struct ie_regs *ereg; 97 int pa, x; 98 99 if (ca->ca_paddr == -1) 100 return (0); 101 102 /* Is it there at all? */ 103 pa = ca->ca_paddr; 104 x = bus_peek(ca->ca_bustype, pa, 2); 105 if (x == -1) 106 return (0); 107 108 /* Look at the CSR for the SCSI part. */ 109 pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_scsi_regs); 110 sreg = bus_tmapin(ca->ca_bustype, pa); 111 /* Write some bits that are wired to zero. */ 112 sreg->se_csr = 0xFFF3; 113 x = peek_word((caddr_t)(&sreg->se_csr)); 114 bus_tmapout(sreg); 115 if ((x == -1) || (x & 0xFCF0)) { 116 #ifdef DEBUG 117 printf("sebuf_match: SCSI csr=0x%x\n", x); 118 #endif 119 return (0); 120 } 121 122 /* Look at the CSR for the Ethernet part. */ 123 pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_eth_regs); 124 ereg = bus_tmapin(ca->ca_bustype, pa); 125 /* Write some bits that are wired to zero. */ 126 ereg->ie_csr = 0x0FFF; 127 x = peek_word((caddr_t)(&ereg->ie_csr)); 128 bus_tmapout(ereg); 129 if ((x == -1) || (x & 0xFFF)) { 130 #ifdef DEBUG 131 printf("sebuf_match: Ether csr=0x%x\n", x); 132 #endif 133 return (0); 134 } 135 136 /* Default interrupt priority always splbio==2 */ 137 if (ca->ca_intpri == -1) 138 ca->ca_intpri = 2; 139 140 return (1); 141 } 142 143 static void 144 sebuf_attach(parent, self, args) 145 struct device *parent, *self; 146 void *args; 147 { 148 struct sebuf_softc *sc = (struct sebuf_softc *)self; 149 struct confargs *ca = args; 150 struct sebuf_attach_args aa; 151 struct sebuf_regs *regs; 152 153 printf("\n"); 154 155 if (ca->ca_intpri != 2) 156 panic("sebuf: bad level"); 157 158 /* Map in the whole board. */ 159 regs = (struct sebuf_regs *) 160 bus_mapin(ca->ca_bustype, ca->ca_paddr, 161 sizeof(struct sebuf_regs)); 162 if (regs == NULL) 163 panic("sebuf_attach"); 164 sc->sc_regs = regs; 165 166 /* Attach the SCSI child. */ 167 aa.ca = *ca; /* structure copy */ 168 aa.ca.ca_paddr = 0; /* prevent misuse */ 169 aa.name = "se"; 170 aa.buf = ®s->se_scsi_buf[0]; 171 aa.blen = SE_NCRBUFSIZE; 172 aa.regs = ®s->se_scsi_regs; 173 (void) config_found(self, (void *) &aa, sebuf_print); 174 175 /* Attach the Ethernet child. */ 176 aa.ca.ca_intpri++; 177 aa.ca.ca_intvec++; 178 aa.name = "ie"; 179 aa.buf = ®s->se_eth_buf[0]; 180 aa.blen = SE_IEBUFSIZE; 181 aa.regs = ®s->se_eth_regs; 182 (void) config_found(self, (void *) &aa, sebuf_print); 183 } 184 185 static int 186 sebuf_print(aux, name) 187 void *aux; 188 const char *name; 189 { 190 191 if (name != NULL) 192 aprint_normal("%s: ", name); 193 194 return UNCONF; 195 } 196
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