1 /* $NetBSD: sc_vme.c,v 1.8 2002/10/02 16:53:12 thorpej 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 1.8 2002/10/02 16:53:12 thorpej 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 CFATTACH_DECL(sc_vme, sizeof(struct sunscpal_softc), 121 sc_vme_match, sc_vme_attach, NULL, NULL); 122 123 static int 124 sc_vme_match(parent, cf, aux) 125 struct device *parent; 126 struct cfdata *cf; 127 void *aux; 128 { 129 struct vme_attach_args *va = aux; 130 vme_chipset_tag_t ct = va->va_vct; 131 vme_am_t mod; 132 vme_addr_t vme_addr; 133 134 /* Make sure there is something there... */ 135 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 136 vme_addr = va->r[0].offset; 137 138 if (vme_probe(ct, vme_addr, 1, mod, VME_D8, NULL, 0) != 0) 139 return (0); 140 141 /* 142 * If this is a VME SCSI board, we have to determine whether 143 * it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can 144 * be determined using the fact that the "sc" board occupies 145 * 4K bytes in VME space but the "si" board occupies 2K bytes. 146 */ 147 return (vme_probe(ct, vme_addr + 0x801, 1, mod, VME_D8, NULL, 0) == 0); 148 } 149 150 static void 151 sc_vme_attach(parent, self, aux) 152 struct device *parent, *self; 153 void *aux; 154 { 155 struct sunscpal_softc *sc = (struct sunscpal_softc *) self; 156 struct vme_attach_args *va = aux; 157 vme_chipset_tag_t ct = va->va_vct; 158 bus_space_tag_t bt; 159 bus_space_handle_t bh; 160 vme_mapresc_t resc; 161 vme_intr_handle_t ih; 162 vme_am_t mod; 163 int i; 164 165 sc->sunscpal_dmat = va->va_bdt; 166 167 mod = VME_AM_A24 | VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA; 168 169 if (vme_space_map(ct, va->r[0].offset, SCREG_BANK_SZ, 170 mod, VME_D8, 0, &bt, &bh, &resc) != 0) 171 panic("%s: vme_space_map", sc->sc_dev.dv_xname); 172 173 sc->sunscpal_regt = bt; 174 sc->sunscpal_regh = bh; 175 176 vme_intr_map(ct, va->ilevel, va->ivector, &ih); 177 vme_intr_establish(ct, ih, IPL_BIO, sc_vme_intr, sc); 178 179 printf("\n"); 180 181 /* 182 * Initialize fields used by the MI code 183 */ 184 185 /* PAL register bank offsets */ 186 sc->sunscpal_data = SCREG_DATA; 187 sc->sunscpal_cmd_stat = SCREG_CMD_STAT; 188 sc->sunscpal_icr = SCREG_ICR; 189 sc->sunscpal_dma_addr_h = SCREG_DMA_ADDR_H; 190 sc->sunscpal_dma_addr_l = SCREG_DMA_ADDR_L; 191 sc->sunscpal_dma_count = SCREG_DMA_COUNT; 192 sc->sunscpal_intvec = SCREG_INTVEC; 193 194 /* Miscellaneous. */ 195 sc->sc_min_dma_len = MIN_DMA_LEN; 196 sc->sc_rev = SUNSCPAL_VARIANT_501_1045; 197 198 /* 199 * Allocate DMA handles. 200 */ 201 i = SUNSCPAL_OPENINGS * sizeof(struct sunscpal_dma_handle); 202 sc->sc_dma_handles = (struct sunscpal_dma_handle *)malloc(i, M_DEVBUF, M_NOWAIT); 203 if (sc->sc_dma_handles == NULL) 204 panic("sc: dma handle malloc failed"); 205 206 for (i = 0; i < SUNSCPAL_OPENINGS; i++) { 207 sc->sc_dma_handles[i].dh_flags = 0; 208 209 /* Allocate a DMA handle */ 210 if (vme_dmamap_create( 211 ct, /* VME chip tag */ 212 SUNSCPAL_MAX_DMA_LEN, /* size */ 213 VME_AM_A24, /* address modifier */ 214 VME_D16, /* data size */ 215 0, /* swap */ 216 1, /* nsegments */ 217 SUNSCPAL_MAX_DMA_LEN, /* maxsegsz */ 218 0, /* boundary */ 219 BUS_DMA_NOWAIT, 220 &sc->sc_dma_handles[i].dh_dmamap) != 0) { 221 222 printf("%s: DMA buffer map create error\n", 223 sc->sc_dev.dv_xname); 224 return; 225 } 226 } 227 228 /* 229 * Set up interrupts on the board. 230 */ 231 SUNSCPAL_WRITE_1(sc, sunscpal_intvec, va->ivector & 0xFF); 232 233 /* Do the common attach stuff. */ 234 printf("%s", sc->sc_dev.dv_xname); 235 sunscpal_attach(sc, (sc->sc_dev.dv_cfdata->cf_flags ? sc->sc_dev.dv_cfdata->cf_flags : sunsc_vme_options)); 236 } 237 238 static int 239 sc_vme_intr(void *arg) 240 { 241 struct sunscpal_softc *sc = arg; 242 int claimed; 243 244 claimed = sunscpal_intr(sc); 245 #ifdef DEBUG 246 if (!claimed) { 247 printf("sc_vme_intr: spurious from SBC\n"); 248 } 249 #endif 250 /* Yes, we DID cause this interrupt. */ 251 claimed = 1; 252 253 return (claimed); 254 } 255 256