asc_vsbus.c revision 1.3
1 /* $NetBSD: asc_vsbus.c,v 1.3 2000/03/04 18:20:53 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 40 41 __KERNEL_RCSID(0, "$NetBSD: asc_vsbus.c,v 1.3 2000/03/04 18:20:53 matt Exp $"); 42 43 #include <sys/types.h> 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/errno.h> 48 #include <sys/ioctl.h> 49 #include <sys/device.h> 50 #include <sys/buf.h> 51 #include <sys/proc.h> 52 #include <sys/user.h> 53 #include <sys/reboot.h> 54 #include <sys/queue.h> 55 56 #include <dev/scsipi/scsi_all.h> 57 #include <dev/scsipi/scsipi_all.h> 58 #include <dev/scsipi/scsiconf.h> 59 #include <dev/scsipi/scsi_message.h> 60 61 #include <machine/bus.h> 62 63 #include <dev/ic/ncr53c9xreg.h> 64 #include <dev/ic/ncr53c9xvar.h> 65 66 #include <machine/cpu.h> 67 #include <machine/sid.h> 68 #include <machine/rpb.h> 69 #include <machine/scb.h> 70 #include <machine/vsbus.h> 71 72 struct asc_vsbus_softc { 73 struct ncr53c9x_softc sc_ncr53c9x; /* Must be first */ 74 bus_space_tag_t sc_bst; /* bus space tag */ 75 bus_space_handle_t sc_bsh; /* bus space handle */ 76 bus_dma_tag_t sc_dmat; /* bus dma tag */ 77 bus_dmamap_t sc_dmamap; 78 caddr_t *sc_dmaaddr; 79 size_t *sc_dmalen; 80 size_t sc_dmasize; 81 unsigned int sc_flags; 82 #define ASC_DMAACTIVE 0x0001 83 #define ASC_ISWRITE 0x0002 84 #define ASC_INTR 0x0004 85 }; 86 87 #define ASC_REG_ADR 0x0000 88 #define ASC_REG_DIR 0x000C 89 #define ASC_REG_NCR 0x0080 90 #define ASC_REG_END 0x00B0 91 92 #define ASC_DIR_TO_MEMORY 0x0000 93 #define ASC_DIR_FROM_MEMORY 0x0001 94 95 #define ASC_MAXXFERSIZE 65536 96 #define ASC_FREQUENCY 20000000 97 98 static int asc_vsbus_match __P((struct device *, struct cfdata *, void *)); 99 static void asc_vsbus_attach __P((struct device *, struct device *, void *)); 100 static void ascintr __P((void *)); 101 102 struct cfattach asc_vsbus_ca = { 103 sizeof(struct asc_vsbus_softc), asc_vsbus_match, asc_vsbus_attach 104 }; 105 106 static struct scsipi_device asc_vsbus_dev = { 107 NULL, /* Use the default error handler */ 108 NULL, /* have a queue, served by this */ 109 NULL, /* have no async handler */ 110 NULL, /* use the default done handler */ 111 }; 112 113 /* 114 * Functions and the switch for the MI code 115 */ 116 static u_char asc_vsbus_read_reg __P((struct ncr53c9x_softc *, int)); 117 static void asc_vsbus_write_reg __P((struct ncr53c9x_softc *, int, u_char)); 118 static int asc_vsbus_dma_isintr __P((struct ncr53c9x_softc *)); 119 static void asc_vsbus_dma_reset __P((struct ncr53c9x_softc *)); 120 static int asc_vsbus_dma_intr __P((struct ncr53c9x_softc *)); 121 static int asc_vsbus_dma_setup __P((struct ncr53c9x_softc *, caddr_t *, 122 size_t *, int, size_t *)); 123 static void asc_vsbus_dma_go __P((struct ncr53c9x_softc *)); 124 static void asc_vsbus_dma_stop __P((struct ncr53c9x_softc *)); 125 static int asc_vsbus_dma_isactive __P((struct ncr53c9x_softc *)); 126 static void asc_vsbus_clear_latched_intr __P((struct ncr53c9x_softc *)); 127 128 static struct ncr53c9x_glue asc_vsbus_glue = { 129 asc_vsbus_read_reg, 130 asc_vsbus_write_reg, 131 asc_vsbus_dma_isintr, 132 asc_vsbus_dma_reset, 133 asc_vsbus_dma_intr, 134 asc_vsbus_dma_setup, 135 asc_vsbus_dma_go, 136 asc_vsbus_dma_stop, 137 asc_vsbus_dma_isactive, 138 asc_vsbus_clear_latched_intr, 139 }; 140 141 static int 142 asc_vsbus_match( struct device *parent, struct cfdata *cf, void *aux) 143 { 144 struct vsbus_attach_args *va = aux; 145 int dummy; 146 volatile u_int8_t *ncr_regs; 147 148 if (vax_boardtype != VAX_BTYP_46 149 && vax_boardtype != VAX_BTYP_48 150 && vax_boardtype != VAX_BTYP_49) 151 return 0; 152 153 ncr_regs = (volatile u_int8_t *) va->va_addr; 154 155 /* *** need to generate an interrupt here 156 * From trial and error, I've determined that an INT is generated 157 * only when the following sequence of events occurs: 158 * 1) The interrupt status register (0x05) must be read. 159 * 2) SCSI bus reset interrupt must be enabled 160 * 3) SCSI bus reset command must be sent 161 * 4) NOP command must be sent 162 */ 163 164 dummy = ncr_regs[NCR_INTR << 2] & 0xFF; 165 ncr_regs[NCR_CFG1 << 2] = 0x07; /* we're ID 7, turn on INT for SCSI reset */ 166 ncr_regs[NCR_CMD << 2] = NCRCMD_RSTSCSI; /* send the reset */ 167 ncr_regs[NCR_CMD << 2] = NCRCMD_NOP; /* send a NOP */ 168 DELAY(10000); 169 170 dummy = ncr_regs[NCR_INTR << 2] & 0xFF; 171 return (dummy & NCRINTR_SBR) != 0; 172 } 173 174 175 /* 176 * Attach this instance, and then all the sub-devices 177 */ 178 static void 179 asc_vsbus_attach(struct device *parent, struct device *self, void *aux) 180 { 181 struct vsbus_attach_args *va = aux; 182 struct asc_vsbus_softc *asc = (void *)self; 183 struct ncr53c9x_softc *sc = &asc->sc_ncr53c9x; 184 int error; 185 186 /* 187 * Set up glue for MI code early; we use some of it here. 188 */ 189 sc->sc_glue = &asc_vsbus_glue; 190 191 asc->sc_bst = va->va_iot; 192 asc->sc_dmat = va->va_dmat; 193 194 error = bus_space_map(asc->sc_bst, va->va_paddr - ASC_REG_NCR, 195 ASC_REG_END, 0, &asc->sc_bsh); 196 if (error) { 197 printf(": failed to map registers: error=%d\n", error); 198 return; 199 } 200 201 sc->sc_id = 7; /* XXX need to get this from VMB */ 202 sc->sc_freq = ASC_FREQUENCY; 203 204 /* gimme Mhz */ 205 sc->sc_freq /= 1000000; 206 207 scb_vecalloc(va->va_cvec, ascintr, asc, SCB_ISTACK); 208 209 /* 210 * XXX More of this should be in ncr53c9x_attach(), but 211 * XXX should we really poke around the chip that much in 212 * XXX the MI code? Think about this more... 213 */ 214 215 /* 216 * Set up static configuration info. 217 */ 218 sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB; 219 sc->sc_cfg2 = NCRCFG2_SCSI2; 220 sc->sc_cfg3 = NCRCFG3_CDB; 221 sc->sc_rev = NCR_VARIANT_NCR53C94; 222 223 /* 224 * XXX minsync and maxxfer _should_ be set up in MI code, 225 * XXX but it appears to have some dependency on what sort 226 * XXX of DMA we're hooked up to, etc. 227 */ 228 229 /* 230 * This is the value used to start sync negotiations 231 * Note that the NCR register "SYNCTP" is programmed 232 * in "clocks per byte", and has a minimum value of 4. 233 * The SCSI period used in negotiation is one-fourth 234 * of the time (in nanoseconds) needed to transfer one byte. 235 * Since the chip's clock is given in MHz, we have the following 236 * formula: 4 * period = (1000 / freq) * 4 237 */ 238 sc->sc_minsync = (1000 / sc->sc_freq); 239 sc->sc_maxxfer = 64 * 1024; 240 241 printf("\n%s", self->dv_xname); /* Pretty print */ 242 243 /* Do the common parts of attachment. */ 244 sc->sc_adapter.scsipi_cmd = ncr53c9x_scsi_cmd; 245 sc->sc_adapter.scsipi_minphys = minphys; 246 ncr53c9x_attach(sc, &asc_vsbus_dev); 247 248 /* 249 * Register this device as boot device if we booted from it. 250 * This will fail if there are more than one le in a machine, 251 * fortunately there may be only one. 252 */ 253 if (B_TYPE(bootdev) == BDEV_SD) 254 booted_from = self; 255 } 256 257 static void 258 ascintr(void *arg) 259 { 260 struct asc_vsbus_softc *asc = arg; 261 asc->sc_flags |= ASC_INTR; 262 ncr53c9x_intr(&asc->sc_ncr53c9x); 263 asc->sc_flags &= ~ASC_INTR; 264 } 265 266 /* 267 * Glue functions. 268 */ 269 270 static u_char 271 asc_vsbus_read_reg(struct ncr53c9x_softc *sc, int reg) 272 { 273 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 274 u_char v; 275 276 v = bus_space_read_1(asc->sc_bst, asc->sc_bsh, 277 ASC_REG_NCR + reg * sizeof(u_int32_t)); 278 279 return (v); 280 } 281 282 static void 283 asc_vsbus_write_reg(sc, reg, val) 284 struct ncr53c9x_softc *sc; 285 int reg; 286 u_char val; 287 { 288 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 289 290 bus_space_write_1(asc->sc_bst, asc->sc_bsh, 291 ASC_REG_NCR + reg * sizeof(u_int32_t), val); 292 } 293 294 static int 295 asc_vsbus_dma_isintr(sc) 296 struct ncr53c9x_softc *sc; 297 { 298 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 299 int isintr = (asc->sc_flags & ASC_INTR); 300 asc->sc_flags &= ~ASC_INTR; 301 return isintr; /* this is the only reason */ 302 } 303 304 static void 305 asc_vsbus_dma_reset(sc) 306 struct ncr53c9x_softc *sc; 307 { 308 #if 0 309 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 310 #endif 311 312 /* nothing to do */ 313 } 314 315 static int 316 asc_vsbus_dma_intr(sc) 317 struct ncr53c9x_softc *sc; 318 { 319 #if 0 320 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 321 #endif 322 323 return 0; 324 } 325 326 static int 327 asc_vsbus_dma_setup(struct ncr53c9x_softc *sc, caddr_t *addr, size_t *len, 328 int datain, size_t *dmasize) 329 { 330 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 331 332 asc->sc_dmaaddr = addr; 333 asc->sc_dmalen = len; 334 if (datain) { 335 asc->sc_flags |= ASC_ISWRITE; 336 } else { 337 asc->sc_flags &= ~ASC_ISWRITE; 338 } 339 340 NCR_DMA(("%s: start %d@%p,%d\n", sc->sc_dev.dv_xname, 341 (int)*asc->sc_dmalen, *asc->sc_dmaaddr, (asc->sc_flags & ASC_ISWRITE))); 342 *dmasize = asc->sc_dmasize = min(*dmasize, ASC_MAXXFERSIZE); 343 344 if (asc->sc_dmasize) { 345 if (bus_dmamap_load(asc->sc_dmat, asc->sc_dmamap, 346 *asc->sc_dmaaddr, asc->sc_dmasize, 347 NULL /* kernel address */, 348 BUS_DMA_NOWAIT)) 349 panic("%s: cannot load dma map", sc->sc_dev.dv_xname); 350 bus_dmamap_sync(asc->sc_dmat, asc->sc_dmamap, 351 0, asc->sc_dmasize, datain 352 ? BUS_DMASYNC_PREREAD 353 : BUS_DMASYNC_PREWRITE); 354 bus_space_write_4(asc->sc_bst, asc->sc_bsh, ASC_REG_ADR, 355 asc->sc_dmamap->dm_segs[0].ds_addr); 356 bus_space_write_4(asc->sc_bst, asc->sc_bsh, ASC_REG_DIR, 357 datain ? 0 : 1); 358 } 359 360 361 return 0; 362 } 363 364 static void 365 asc_vsbus_dma_go(struct ncr53c9x_softc *sc) 366 { 367 #if 0 368 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 369 #endif 370 371 /* Nothing to do */ 372 } 373 374 static void 375 asc_vsbus_dma_stop(struct ncr53c9x_softc *sc) 376 { 377 #if 0 378 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 379 #endif 380 381 /* 382 * XXX STOP DMA HERE! 383 */ 384 } 385 386 static int 387 asc_vsbus_dma_isactive(struct ncr53c9x_softc *sc) 388 { 389 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 390 391 return (asc->sc_flags & ASC_DMAACTIVE) != 0; 392 } 393 394 static void 395 asc_vsbus_clear_latched_intr(struct ncr53c9x_softc *sc) 396 { 397 #if 0 398 struct asc_vsbus_softc *asc = (struct asc_vsbus_softc *)sc; 399 #endif 400 } 401
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