1 /* $NetBSD: sc_vme.c,v 1.3 2001/11/13 06:17:07 lukem 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 <sys/cdefs.h> 72 __KERNEL_RCSID(0, "$NetBSD: sc_vme.c,v 1.3 2001/11/13 06:17:07 lukem Exp $"); 73 74 #include "opt_ddb.h" 75 76 #include <sys/types.h> 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/malloc.h> 81 #include <sys/errno.h> 82 #include <sys/device.h> 83 #include <sys/buf.h> 84 85 #include <machine/bus.h> 86 #include <machine/intr.h> 87 88 #include <dev/vme/vmereg.h> 89 #include <dev/vme/vmevar.h> 90 91 #include <dev/scsipi/scsi_all.h> 92 #include <dev/scsipi/scsipi_all.h> 93 #include <dev/scsipi/scsipi_debug.h> 94 #include <dev/scsipi/scsiconf.h> 95 96 #if !defined(DDB) && !defined(Debugger) 97 #define Debugger() 98 #endif 99 100 #ifndef DEBUG 101 #define DEBUG XXX 102 #endif 103 104 #include <dev/ic/sunscpalvar.h> 105 106 #include <dev/vme/screg.h> 107 108 /* 109 * Transfers smaller than this are done using PIO 110 * (on assumption they're not worth DMA overhead) 111 */ 112 #define MIN_DMA_LEN 128 113 114 int sunsc_vme_options = 0; 115 116 static int sc_vme_match __P((struct device *, struct cfdata *, void *)); 117 static void sc_vme_attach __P((struct device *, struct device *, void *)); 118 static int sc_vme_intr __P((void *)); 119 120 /* Auto-configuration glue. */ 121 struct cfattach sc_vme_ca = { 122 sizeof(struct sunscpal_softc), sc_vme_match, sc_vme_attach 123 }; 124 125 static int 126 sc_vme_match(parent, cf, aux) 127 struct device *parent; 128 struct cfdata *cf; 129 void *aux; 130 { 131 struct vme_attach_args *va = aux; 132 vme_chipset_tag_t ct = va->va_vct; 133 vme_am_t mod; 134 vme_addr_t vme_addr; 135 136 /* Make sure there is something there... */ 137 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 138 vme_addr = va->r[0].offset; 139 140 if (vme_probe(ct, vme_addr, 1, mod, VME_D8, NULL, 0) != 0) 141 return (0); 142 143 /* 144 * If this is a VME SCSI board, we have to determine whether 145 * it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can 146 * be determined using the fact that the "sc" board occupies 147 * 4K bytes in VME space but the "si" board occupies 2K bytes. 148 */ 149 return (vme_probe(ct, vme_addr + 0x801, 1, mod, VME_D8, NULL, 0) == 0); 150 } 151 152 static void 153 sc_vme_attach(parent, self, aux) 154 struct device *parent, *self; 155 void *aux; 156 { 157 struct sunscpal_softc *sc = (struct sunscpal_softc *) self; 158 struct vme_attach_args *va = aux; 159 vme_chipset_tag_t ct = va->va_vct; 160 bus_space_tag_t bt; 161 bus_space_handle_t bh; 162 vme_mapresc_t resc; 163 vme_intr_handle_t ih; 164 vme_am_t mod; 165 int i; 166 167 sc->sunscpal_dmat = va->va_bdt; 168 169 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 170 171 if (vme_space_map(ct, va->r[0].offset, SCREG_BANK_SZ, 172 mod, VME_D8, 0, &bt, &bh, &resc) != 0) 173 panic("%s: vme_space_map", sc->sc_dev.dv_xname); 174 175 sc->sunscpal_regt = bt; 176 sc->sunscpal_regh = bh; 177 178 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 179 vme_intr_establish(ct, ih, IPL_BIO, sc_vme_intr, sc); 180 181 printf("\n"); 182 183 /* 184 * Initialize fields used by the MI code 185 */ 186 187 /* PAL register bank offsets */ 188 sc->sunscpal_data = SCREG_DATA; 189 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 190 sc->sunscpal_icr = SCREG_ICR; 191 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 192 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 193 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 194 sc->sunscpal_intvec = SCREG_INTVEC; 195 196 /* Miscellaneous. */ 197 sc->sc_min_dma_len = MIN_DMA_LEN; 198 sc->sc_rev = SUNSCPAL_VARIANT_501_1045; 199 200 /* 201 * Allocate DMA handles. 202 */ 203 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 204 sc->sc_dma_handles = (struct sunscpal_dma_handle *)malloc(i, M_DEVBUF, M_NOWAIT); 205 if (sc->sc_dma_handles == NULL) 206 panic("sc: dma handle malloc failed\n"); 207 208 for (i = 0; i < SUNSCPAL_OPENINGS; i++) { 209 sc->sc_dma_handles[i].dh_flags = 0; 210 211 /* Allocate a DMA handle */ 212 if (vme_dmamap_create( 213 ct, /* VME chip tag */ 214 SUNSCPAL_MAX_DMA_LEN, /* size */ 215 VME_AM_A24, /* address modifier */ 216 VME_D16, /* data size */ 217 0, /* swap */ 218 1, /* nsegments */ 219 SUNSCPAL_MAX_DMA_LEN, /* maxsegsz */ 220 0, /* boundary */ 221 BUS_DMA_NOWAIT, 222 &sc->sc_dma_handles[i].dh_dmamap) != 0) { 223 224 printf("%s: DMA buffer map create error\n", 225 sc->sc_dev.dv_xname); 226 return; 227 } 228 } 229 230 /* 231 * Set up interrupts on the board. 232 */ 233 SUNSCPAL_WRITE_1(sc, sunscpal_intvec, va->ivector & 0xFF); 234 235 /* Do the common attach stuff. */ 236 printf("%s", sc->sc_dev.dv_xname); 237 sunscpal_attach(sc, (sc->sc_dev.dv_cfdata->cf_flags ? sc->sc_dev.dv_cfdata->cf_flags : sunsc_vme_options)); 238 } 239 240 static int 241 sc_vme_intr(void *arg) 242 { 243 struct sunscpal_softc *sc = arg; 244 int claimed; 245 246 claimed = sunscpal_intr(sc); 247 #ifdef DEBUG 248 if (!claimed) { 249 printf("sc_vme_intr: spurious from SBC\n"); 250 } 251 #endif 252 /* Yes, we DID cause this interrupt. */ 253 claimed = 1; 254 255 return (claimed); 256 } 257 258