1 /* $NetBSD: sc_vme.c,v 1.2 2001/06/27 20:17:20 fredette Exp $ */ 2 3 /*- 4 * Copyright (c) 1996,2000,2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass, David Jones, Gordon W. Ross, Jason R. Thorpe, 9 * Paul Kranenburg, and Matt Fredette. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * This file contains VME bus-dependent of the `sc' SCSI adapter. 42 * This hardware is frequently found on Sun 2, Sun 3, and Sun 4 machines. 43 * 44 * The SCSI machinery on this adapter is implemented by an Sun custom 45 * chipset, which is handled by the chipset driver in /sys/dev/ic/sunscpal.c 46 */ 47 48 /* 49 * This driver originated as an MD implementation for the `si' VME driver. 50 * The notes pertaining to that history are included below. 51 * 52 * David Jones wrote the initial version of this module for NetBSD/sun3, 53 * which included support for the VME adapter only. (no reselection). 54 * 55 * Gordon Ross added support for the Sun 3 OBIO adapter, and re-worked 56 * both the VME and OBIO code to support disconnect/reselect. 57 * (Required figuring out the hardware "features" noted above.) 58 * 59 * The autoconfiguration boilerplate came from Adam Glass. 60 * 61 * Jason R. Thorpe ported the autoconfiguration and VME portions to 62 * NetBSD/sparc, and added initial support for the 4/100 "SCSI Weird", 63 * a wacky OBIO variant of the VME SCSI-3. Many thanks to Chuck Cranor 64 * for lots of helpful tips and suggestions. Thanks also to Paul Kranenburg 65 * and Chris Torek for bits of insight needed along the way. Thanks to 66 * David Gilbert and Andrew Gillham who risked filesystem life-and-limb 67 * for the sake of testing. Andrew Gillham helped work out the bugs 68 * the 4/100 DMA code. 69 */ 70 71 #include "opt_ddb.h" 72 73 #include <sys/types.h> 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/malloc.h> 78 #include <sys/errno.h> 79 #include <sys/device.h> 80 #include <sys/buf.h> 81 82 #include <machine/bus.h> 83 #include <machine/intr.h> 84 85 #include <dev/vme/vmereg.h> 86 #include <dev/vme/vmevar.h> 87 88 #include <dev/scsipi/scsi_all.h> 89 #include <dev/scsipi/scsipi_all.h> 90 #include <dev/scsipi/scsipi_debug.h> 91 #include <dev/scsipi/scsiconf.h> 92 93 #if !defined(DDB) && !defined(Debugger) 94 #define Debugger() 95 #endif 96 97 #ifndef DEBUG 98 #define DEBUG XXX 99 #endif 100 101 #include <dev/ic/sunscpalvar.h> 102 103 #include <dev/vme/screg.h> 104 105 /* 106 * Transfers smaller than this are done using PIO 107 * (on assumption they're not worth DMA overhead) 108 */ 109 #define MIN_DMA_LEN 128 110 111 int sunsc_vme_options = 0; 112 113 static int sc_vme_match __P((struct device *, struct cfdata *, void *)); 114 static void sc_vme_attach __P((struct device *, struct device *, void *)); 115 static int sc_vme_intr __P((void *)); 116 117 /* Auto-configuration glue. */ 118 struct cfattach sc_vme_ca = { 119 sizeof(struct sunscpal_softc), sc_vme_match, sc_vme_attach 120 }; 121 122 static int 123 sc_vme_match(parent, cf, aux) 124 struct device *parent; 125 struct cfdata *cf; 126 void *aux; 127 { 128 struct vme_attach_args *va = aux; 129 vme_chipset_tag_t ct = va->va_vct; 130 vme_am_t mod; 131 vme_addr_t vme_addr; 132 133 /* Make sure there is something there... */ 134 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 135 vme_addr = va->r[0].offset; 136 137 if (vme_probe(ct, vme_addr, 1, mod, VME_D8, NULL, 0) != 0) 138 return (0); 139 140 /* 141 * If this is a VME SCSI board, we have to determine whether 142 * it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can 143 * be determined using the fact that the "sc" board occupies 144 * 4K bytes in VME space but the "si" board occupies 2K bytes. 145 */ 146 return (vme_probe(ct, vme_addr + 0x801, 1, mod, VME_D8, NULL, 0) == 0); 147 } 148 149 static void 150 sc_vme_attach(parent, self, aux) 151 struct device *parent, *self; 152 void *aux; 153 { 154 struct sunscpal_softc *sc = (struct sunscpal_softc *) self; 155 struct vme_attach_args *va = aux; 156 vme_chipset_tag_t ct = va->va_vct; 157 bus_space_tag_t bt; 158 bus_space_handle_t bh; 159 vme_mapresc_t resc; 160 vme_intr_handle_t ih; 161 vme_am_t mod; 162 int i; 163 164 sc->sunscpal_dmat = va->va_bdt; 165 166 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 167 168 if (vme_space_map(ct, va->r[0].offset, SCREG_BANK_SZ, 169 mod, VME_D8, 0, &bt, &bh, &resc) != 0) 170 panic("%s: vme_space_map", sc->sc_dev.dv_xname); 171 172 sc->sunscpal_regt = bt; 173 sc->sunscpal_regh = bh; 174 175 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 176 vme_intr_establish(ct, ih, IPL_BIO, sc_vme_intr, sc); 177 178 printf("\n"); 179 180 /* 181 * Initialize fields used by the MI code 182 */ 183 184 /* PAL register bank offsets */ 185 sc->sunscpal_data = SCREG_DATA; 186 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 187 sc->sunscpal_icr = SCREG_ICR; 188 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 189 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 190 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 191 sc->sunscpal_intvec = SCREG_INTVEC; 192 193 /* Miscellaneous. */ 194 sc->sc_min_dma_len = MIN_DMA_LEN; 195 sc->sc_rev = SUNSCPAL_VARIANT_501_1045; 196 197 /* 198 * Allocate DMA handles. 199 */ 200 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 201 sc->sc_dma_handles = (struct sunscpal_dma_handle *)malloc(i, M_DEVBUF, M_NOWAIT); 202 if (sc->sc_dma_handles == NULL) 203 panic("sc: dma handle malloc failed\n"); 204 205 for (i = 0; i < SUNSCPAL_OPENINGS; i++) { 206 sc->sc_dma_handles[i].dh_flags = 0; 207 208 /* Allocate a DMA handle */ 209 if (vme_dmamap_create( 210 ct, /* VME chip tag */ 211 SUNSCPAL_MAX_DMA_LEN, /* size */ 212 VME_AM_A24, /* address modifier */ 213 VME_D16, /* data size */ 214 0, /* swap */ 215 1, /* nsegments */ 216 SUNSCPAL_MAX_DMA_LEN, /* maxsegsz */ 217 0, /* boundary */ 218 BUS_DMA_NOWAIT, 219 &sc->sc_dma_handles[i].dh_dmamap) != 0) { 220 221 printf("%s: DMA buffer map create error\n", 222 sc->sc_dev.dv_xname); 223 return; 224 } 225 } 226 227 /* 228 * Set up interrupts on the board. 229 */ 230 SUNSCPAL_WRITE_1(sc, sunscpal_intvec, va->ivector & 0xFF); 231 232 /* Do the common attach stuff. */ 233 printf("%s", sc->sc_dev.dv_xname); 234 sunscpal_attach(sc, (sc->sc_dev.dv_cfdata->cf_flags ? sc->sc_dev.dv_cfdata->cf_flags : sunsc_vme_options)); 235 } 236 237 static int 238 sc_vme_intr(void *arg) 239 { 240 struct sunscpal_softc *sc = arg; 241 int claimed; 242 243 claimed = sunscpal_intr(sc); 244 #ifdef DEBUG 245 if (!claimed) { 246 printf("sc_vme_intr: spurious from SBC\n"); 247 } 248 #endif 249 /* Yes, we DID cause this interrupt. */ 250 claimed = 1; 251 252 return (claimed); 253 } 254 255