1 /* $NetBSD: sc_vme.c,v 1.4 2001/11/15 09:48:19 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 1.4 2001/11/15 09:48:19 lukem Exp $"); 73 74 #include "opt_ddb.h" 75 76 #include <sys/param.h> 77 #include <sys/systm.h> 78 #include <sys/kernel.h> 79 #include <sys/malloc.h> 80 #include <sys/errno.h> 81 #include <sys/device.h> 82 #include <sys/buf.h> 83 84 #include <machine/bus.h> 85 #include <machine/intr.h> 86 87 #include <dev/vme/vmereg.h> 88 #include <dev/vme/vmevar.h> 89 90 #include <dev/scsipi/scsi_all.h> 91 #include <dev/scsipi/scsipi_all.h> 92 #include <dev/scsipi/scsipi_debug.h> 93 #include <dev/scsipi/scsiconf.h> 94 95 #if !defined(DDB) && !defined(Debugger) 96 #define Debugger() 97 #endif 98 99 #ifndef DEBUG 100 #define DEBUG XXX 101 #endif 102 103 #include <dev/ic/sunscpalvar.h> 104 105 #include <dev/vme/screg.h> 106 107 /* 108 * Transfers smaller than this are done using PIO 109 * (on assumption they're not worth DMA overhead) 110 */ 111 #define MIN_DMA_LEN 128 112 113 int sunsc_vme_options = 0; 114 115 static int sc_vme_match __P((struct device *, struct cfdata *, void *)); 116 static void sc_vme_attach __P((struct device *, struct device *, void *)); 117 static int sc_vme_intr __P((void *)); 118 119 /* Auto-configuration glue. */ 120 struct cfattach sc_vme_ca = { 121 sizeof(struct sunscpal_softc), sc_vme_match, sc_vme_attach 122 }; 123 124 static int 125 sc_vme_match(parent, cf, aux) 126 struct device *parent; 127 struct cfdata *cf; 128 void *aux; 129 { 130 struct vme_attach_args *va = aux; 131 vme_chipset_tag_t ct = va->va_vct; 132 vme_am_t mod; 133 vme_addr_t vme_addr; 134 135 /* Make sure there is something there... */ 136 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 137 vme_addr = va->r[0].offset; 138 139 if (vme_probe(ct, vme_addr, 1, mod, VME_D8, NULL, 0) != 0) 140 return (0); 141 142 /* 143 * If this is a VME SCSI board, we have to determine whether 144 * it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can 145 * be determined using the fact that the "sc" board occupies 146 * 4K bytes in VME space but the "si" board occupies 2K bytes. 147 */ 148 return (vme_probe(ct, vme_addr + 0x801, 1, mod, VME_D8, NULL, 0) == 0); 149 } 150 151 static void 152 sc_vme_attach(parent, self, aux) 153 struct device *parent, *self; 154 void *aux; 155 { 156 struct sunscpal_softc *sc = (struct sunscpal_softc *) self; 157 struct vme_attach_args *va = aux; 158 vme_chipset_tag_t ct = va->va_vct; 159 bus_space_tag_t bt; 160 bus_space_handle_t bh; 161 vme_mapresc_t resc; 162 vme_intr_handle_t ih; 163 vme_am_t mod; 164 int i; 165 166 sc->sunscpal_dmat = va->va_bdt; 167 168 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 169 170 if (vme_space_map(ct, va->r[0].offset, SCREG_BANK_SZ, 171 mod, VME_D8, 0, &bt, &bh, &resc) != 0) 172 panic("%s: vme_space_map", sc->sc_dev.dv_xname); 173 174 sc->sunscpal_regt = bt; 175 sc->sunscpal_regh = bh; 176 177 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 178 vme_intr_establish(ct, ih, IPL_BIO, sc_vme_intr, sc); 179 180 printf("\n"); 181 182 /* 183 * Initialize fields used by the MI code 184 */ 185 186 /* PAL register bank offsets */ 187 sc->sunscpal_data = SCREG_DATA; 188 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 189 sc->sunscpal_icr = SCREG_ICR; 190 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 191 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 192 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 193 sc->sunscpal_intvec = SCREG_INTVEC; 194 195 /* Miscellaneous. */ 196 sc->sc_min_dma_len = MIN_DMA_LEN; 197 sc->sc_rev = SUNSCPAL_VARIANT_501_1045; 198 199 /* 200 * Allocate DMA handles. 201 */ 202 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 203 sc->sc_dma_handles = (struct sunscpal_dma_handle *)malloc(i, M_DEVBUF, M_NOWAIT); 204 if (sc->sc_dma_handles == NULL) 205 panic("sc: dma handle malloc failed\n"); 206 207 for (i = 0; i < SUNSCPAL_OPENINGS; i++) { 208 sc->sc_dma_handles[i].dh_flags = 0; 209 210 /* Allocate a DMA handle */ 211 if (vme_dmamap_create( 212 ct, /* VME chip tag */ 213 SUNSCPAL_MAX_DMA_LEN, /* size */ 214 VME_AM_A24, /* address modifier */ 215 VME_D16, /* data size */ 216 0, /* swap */ 217 1, /* nsegments */ 218 SUNSCPAL_MAX_DMA_LEN, /* maxsegsz */ 219 0, /* boundary */ 220 BUS_DMA_NOWAIT, 221 &sc->sc_dma_handles[i].dh_dmamap) != 0) { 222 223 printf("%s: DMA buffer map create error\n", 224 sc->sc_dev.dv_xname); 225 return; 226 } 227 } 228 229 /* 230 * Set up interrupts on the board. 231 */ 232 SUNSCPAL_WRITE_1(sc, sunscpal_intvec, va->ivector & 0xFF); 233 234 /* Do the common attach stuff. */ 235 printf("%s", sc->sc_dev.dv_xname); 236 sunscpal_attach(sc, (sc->sc_dev.dv_cfdata->cf_flags ? sc->sc_dev.dv_cfdata->cf_flags : sunsc_vme_options)); 237 } 238 239 static int 240 sc_vme_intr(void *arg) 241 { 242 struct sunscpal_softc *sc = arg; 243 int claimed; 244 245 claimed = sunscpal_intr(sc); 246 #ifdef DEBUG 247 if (!claimed) { 248 printf("sc_vme_intr: spurious from SBC\n"); 249 } 250 #endif 251 /* Yes, we DID cause this interrupt. */ 252 claimed = 1; 253 254 return (claimed); 255 } 256 257