sebuf.c revision 1.21
1 /* $NetBSD: sebuf.c,v 1.21 2024/12/20 23:52:00 tsutsui 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 1.21 2024/12/20 23:52:00 tsutsui 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/mman.h> 56 #include <sys/proc.h> 57 #include <sys/tty.h> 58 59 #include <uvm/uvm_extern.h> 60 61 #include <machine/autoconf.h> 62 #include <machine/cpu.h> 63 64 #include "sereg.h" 65 #include "sevar.h" 66 67 struct sebuf_softc { 68 device_t sc_dev; /* base device (required) */ 69 struct sebuf_regs *sc_regs; 70 }; 71 72 /* 73 * Autoconfig attachment 74 */ 75 76 static int sebuf_match(device_t, cfdata_t, void *); 77 static void sebuf_attach(device_t, device_t, void *); 78 static int sebuf_print(void *, const char *); 79 80 CFATTACH_DECL_NEW(sebuf, sizeof(struct sebuf_softc), 81 sebuf_match, sebuf_attach, NULL, NULL); 82 83 static int 84 sebuf_match(device_t parent, cfdata_t cf, void *args) 85 { 86 struct confargs *ca = args; 87 struct se_regs *sreg; 88 struct ie_regs *ereg; 89 int pa, x; 90 91 if (ca->ca_paddr == -1) 92 return 0; 93 94 /* Is it there at all? */ 95 pa = ca->ca_paddr; 96 x = bus_peek(ca->ca_bustype, pa, 2); 97 if (x == -1) 98 return 0; 99 100 /* Look at the CSR for the SCSI part. */ 101 pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_scsi_regs); 102 sreg = bus_tmapin(ca->ca_bustype, pa); 103 /* Write some bits that are wired to zero. */ 104 sreg->se_csr = 0xFFF3; 105 x = peek_word((void *)(&sreg->se_csr)); 106 bus_tmapout(sreg); 107 if ((x == -1) || (x & 0xFCF0)) { 108 #ifdef DEBUG 109 aprint_debug("%s: SCSI csr=0x%x\n", __func__, x); 110 #endif 111 return 0; 112 } 113 114 /* Look at the CSR for the Ethernet part. */ 115 pa = ca->ca_paddr + offsetof(struct sebuf_regs, se_eth_regs); 116 ereg = bus_tmapin(ca->ca_bustype, pa); 117 /* Write some bits that are wired to zero. */ 118 ereg->ie_csr = 0x0FFF; 119 x = peek_word((void *)(&ereg->ie_csr)); 120 bus_tmapout(ereg); 121 if ((x == -1) || (x & 0xFFF)) { 122 #ifdef DEBUG 123 printf("%s: Ether csr=0x%x\n", __func__, x); 124 #endif 125 return 0; 126 } 127 128 /* Default interrupt priority always splbio==2 */ 129 if (ca->ca_intpri == -1) 130 ca->ca_intpri = 2; 131 132 return 1; 133 } 134 135 static void 136 sebuf_attach(device_t parent, device_t self, void *args) 137 { 138 struct sebuf_softc *sc = device_private(self); 139 struct confargs *ca = args; 140 struct sebuf_attach_args aa; 141 struct sebuf_regs *regs; 142 143 sc->sc_dev = self; 144 aprint_normal("\n"); 145 146 if (ca->ca_intpri != 2) 147 panic("sebuf: bad level"); 148 149 /* Map in the whole board. */ 150 regs = (struct sebuf_regs *)bus_mapin(ca->ca_bustype, ca->ca_paddr, 151 sizeof(struct sebuf_regs)); 152 if (regs == NULL) 153 panic("%s", __func__); 154 sc->sc_regs = regs; 155 156 /* Attach the SCSI child. */ 157 aa.ca = *ca; /* structure copy */ 158 aa.ca.ca_paddr = 0; /* prevent misuse */ 159 aa.name = "se"; 160 aa.buf = ®s->se_scsi_buf[0]; 161 aa.blen = SE_NCRBUFSIZE; 162 aa.regs = ®s->se_scsi_regs; 163 (void)config_found(self, (void *)&aa, sebuf_print, CFARGS_NONE); 164 165 /* Attach the Ethernet child. */ 166 aa.ca.ca_intpri++; 167 aa.ca.ca_intvec++; 168 aa.name = "ie"; 169 aa.buf = ®s->se_eth_buf[0]; 170 aa.blen = SE_IEBUFSIZE; 171 aa.regs = ®s->se_eth_regs; 172 (void)config_found(self, (void *)&aa, sebuf_print, CFARGS_NONE); 173 } 174 175 static int 176 sebuf_print(void *aux, const char *name) 177 { 178 179 if (name != NULL) 180 aprint_normal("%s: ", name); 181 182 return UNCONF; 183 } 184
Indexes created Wed Sep 24 02:09:48 GMT 2025