uha_isa.c revision 1.20
1 /* $NetBSD: uha_isa.c,v 1.20 2001/11/13 08:01:33 lukem 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> 40 __KERNEL_RCSID(0, "$NetBSD: uha_isa.c,v 1.20 2001/11/13 08:01:33 lukem Exp $"); 41 42 #include "opt_ddb.h" 43 44 #include <sys/types.h> 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/device.h> 48 #include <sys/kernel.h> 49 #include <sys/proc.h> 50 #include <sys/user.h> 51 52 #include <machine/bus.h> 53 #include <machine/intr.h> 54 55 #include <dev/scsipi/scsi_all.h> 56 #include <dev/scsipi/scsipi_all.h> 57 #include <dev/scsipi/scsiconf.h> 58 59 #include <dev/isa/isavar.h> 60 #include <dev/isa/isadmavar.h> 61 62 #include <dev/ic/uhareg.h> 63 #include <dev/ic/uhavar.h> 64 65 #define UHA_ISA_IOSIZE 16 66 67 int uha_isa_probe __P((struct device *, struct cfdata *, void *)); 68 void uha_isa_attach __P((struct device *, struct device *, void *)); 69 70 struct cfattach uha_isa_ca = { 71 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 72 }; 73 74 #ifndef DDB 75 #define Debugger() panic("should call debugger here (uha_isa.c)") 76 #endif /* ! DDB */ 77 78 int u14_find __P((bus_space_tag_t, bus_space_handle_t, 79 struct uha_probe_data *)); 80 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 81 int u14_poll __P((struct uha_softc *, struct scsipi_xfer *, int)); 82 int u14_intr __P((void *)); 83 void u14_init __P((struct uha_softc *)); 84 85 /* 86 * Check the slots looking for a board we recognise 87 * If we find one, note it's address (slot) and call 88 * the actual probe routine to check it out. 89 */ 90 int 91 uha_isa_probe(parent, match, aux) 92 struct device *parent; 93 struct cfdata *match; 94 void *aux; 95 { 96 struct isa_attach_args *ia = aux; 97 bus_space_tag_t iot = ia->ia_iot; 98 bus_space_handle_t ioh; 99 struct uha_probe_data upd; 100 int rv; 101 102 /* Disallow wildcarded i/o address. */ 103 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 104 return (0); 105 106 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 107 return (0); 108 109 rv = u14_find(iot, ioh, &upd); 110 111 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 112 113 if (rv) { 114 if (ia->ia_irq != -1 && ia->ia_irq != upd.sc_irq) 115 return (0); 116 if (ia->ia_drq != -1 && ia->ia_drq != upd.sc_drq) 117 return (0); 118 ia->ia_irq = upd.sc_irq; 119 ia->ia_drq = upd.sc_drq; 120 ia->ia_msize = 0; 121 ia->ia_iosize = UHA_ISA_IOSIZE; 122 } 123 return (rv); 124 } 125 126 /* 127 * Attach all the sub-devices we can find 128 */ 129 void 130 uha_isa_attach(parent, self, aux) 131 struct device *parent, *self; 132 void *aux; 133 { 134 struct isa_attach_args *ia = aux; 135 struct uha_softc *sc = (void *)self; 136 bus_space_tag_t iot = ia->ia_iot; 137 bus_dma_tag_t dmat = ia->ia_dmat; 138 bus_space_handle_t ioh; 139 struct uha_probe_data upd; 140 isa_chipset_tag_t ic = ia->ia_ic; 141 int error; 142 143 printf("\n"); 144 145 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) { 146 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 147 return; 148 } 149 150 sc->sc_iot = iot; 151 sc->sc_ioh = ioh; 152 sc->sc_dmat = dmat; 153 if (!u14_find(iot, ioh, &upd)) { 154 printf("%s: u14_find failed\n", sc->sc_dev.dv_xname); 155 return; 156 } 157 158 if (upd.sc_drq != -1) { 159 sc->sc_dmaflags = 0; 160 if ((error = isa_dmacascade(ic, upd.sc_drq)) != 0) { 161 printf("%s: unable to cascade DRQ, error = %d\n", 162 sc->sc_dev.dv_xname, error); 163 return; 164 } 165 } else { 166 /* 167 * We have a VLB controller, and can do 32-bit DMA. 168 */ 169 sc->sc_dmaflags = ISABUS_DMA_32BIT; 170 } 171 172 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 173 u14_intr, sc); 174 if (sc->sc_ih == NULL) { 175 printf("%s: couldn't establish interrupt\n", 176 sc->sc_dev.dv_xname); 177 return; 178 } 179 180 /* Save function pointers for later use. */ 181 sc->start_mbox = u14_start_mbox; 182 sc->poll = u14_poll; 183 sc->init = u14_init; 184 185 uha_attach(sc, &upd); 186 } 187 188 /* 189 * Start the board, ready for normal operation 190 */ 191 int 192 u14_find(iot, ioh, sc) 193 bus_space_tag_t iot; 194 bus_space_handle_t ioh; 195 struct uha_probe_data *sc; 196 { 197 u_int16_t model, config; 198 int irq, drq; 199 int resetcount = 4000; /* 4 secs? */ 200 201 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 202 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 203 if ((model & 0xfff0) != 0x5640) 204 return (0); 205 206 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 207 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 208 209 switch (model & 0x000f) { 210 case 0x0000: 211 switch (config & U14_DMA_MASK) { 212 case U14_DMA_CH5: 213 drq = 5; 214 break; 215 case U14_DMA_CH6: 216 drq = 6; 217 break; 218 case U14_DMA_CH7: 219 drq = 7; 220 break; 221 default: 222 printf("u14_find: illegal drq setting %x\n", 223 config & U14_DMA_MASK); 224 return (0); 225 } 226 break; 227 case 0x0001: 228 /* This is a 34f, and doesn't need an ISA DMA channel. */ 229 drq = -1; 230 break; 231 default: 232 printf("u14_find: unknown model %x\n", model); 233 return (0); 234 } 235 236 switch (config & U14_IRQ_MASK) { 237 case U14_IRQ10: 238 irq = 10; 239 break; 240 case U14_IRQ11: 241 irq = 11; 242 break; 243 case U14_IRQ14: 244 irq = 14; 245 break; 246 case U14_IRQ15: 247 irq = 15; 248 break; 249 default: 250 printf("u14_find: illegal irq setting %x\n", 251 config & U14_IRQ_MASK); 252 return (0); 253 } 254 255 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 256 257 while (--resetcount) { 258 if (bus_space_read_1(iot, ioh, U14_LINT)) 259 break; 260 delay(1000); /* 1 mSec per loop */ 261 } 262 if (!resetcount) { 263 printf("u14_find: board timed out during reset\n"); 264 return (0); 265 } 266 267 /* if we want to fill in softc, do so now */ 268 if (sc) { 269 sc->sc_irq = irq; 270 sc->sc_drq = drq; 271 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 272 } 273 274 return (1); 275 } 276 277 /* 278 * Function to send a command out through a mailbox 279 */ 280 void 281 u14_start_mbox(sc, mscp) 282 struct uha_softc *sc; 283 struct uha_mscp *mscp; 284 { 285 bus_space_tag_t iot = sc->sc_iot; 286 bus_space_handle_t ioh = sc->sc_ioh; 287 int spincount = 100000; /* 1s should be enough */ 288 289 while (--spincount) { 290 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 291 break; 292 delay(100); 293 } 294 if (!spincount) { 295 printf("%s: uha_start_mbox, board not responding\n", 296 sc->sc_dev.dv_xname); 297 Debugger(); 298 } 299 300 bus_space_write_4(iot, ioh, U14_OGMPTR, 301 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 302 if (mscp->flags & MSCP_ABORT) 303 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 304 else 305 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 306 307 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 308 callout_reset(&mscp->xs->xs_callout, 309 (mscp->timeout * hz) / 1000, uha_timeout, mscp); 310 } 311 312 /* 313 * Function to poll for command completion when in poll mode. 314 * 315 * wait = timeout in msec 316 */ 317 int 318 u14_poll(sc, xs, count) 319 struct uha_softc *sc; 320 struct scsipi_xfer *xs; 321 int count; 322 { 323 bus_space_tag_t iot = sc->sc_iot; 324 bus_space_handle_t ioh = sc->sc_ioh; 325 326 while (count) { 327 /* 328 * If we had interrupts enabled, would we 329 * have got an interrupt? 330 */ 331 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 332 u14_intr(sc); 333 if (xs->xs_status & XS_STS_DONE) 334 return (0); 335 delay(1000); 336 count--; 337 } 338 return (1); 339 } 340 341 /* 342 * Catch an interrupt from the adaptor 343 */ 344 int 345 u14_intr(arg) 346 void *arg; 347 { 348 struct uha_softc *sc = arg; 349 bus_space_tag_t iot = sc->sc_iot; 350 bus_space_handle_t ioh = sc->sc_ioh; 351 struct uha_mscp *mscp; 352 u_char uhastat; 353 u_long mboxval; 354 355 #ifdef UHADEBUG 356 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 357 #endif /*UHADEBUG */ 358 359 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 360 return (0); 361 362 for (;;) { 363 /* 364 * First get all the information and then 365 * acknowledge the interrupt 366 */ 367 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 368 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 369 /* XXX Send an ABORT_ACK instead? */ 370 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 371 372 #ifdef UHADEBUG 373 printf("status = 0x%x ", uhastat); 374 #endif /*UHADEBUG*/ 375 376 /* 377 * Process the completed operation 378 */ 379 mscp = uha_mscp_phys_kv(sc, mboxval); 380 if (!mscp) { 381 printf("%s: BAD MSCP RETURNED!\n", 382 sc->sc_dev.dv_xname); 383 continue; /* whatever it was, it'll timeout */ 384 } 385 386 callout_stop(&mscp->xs->xs_callout); 387 uha_done(sc, mscp); 388 389 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 390 return (1); 391 } 392 } 393 394 void 395 u14_init(sc) 396 struct uha_softc *sc; 397 { 398 bus_space_tag_t iot = sc->sc_iot; 399 bus_space_handle_t ioh = sc->sc_ioh; 400 401 /* make sure interrupts are enabled */ 402 #ifdef UHADEBUG 403 printf("u14_init: lmask=%02x, smask=%02x\n", 404 bus_space_read_1(iot, ioh, U14_LMASK), 405 bus_space_read_1(iot, ioh, U14_SMASK)); 406 #endif 407 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 408 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 409 } 410
Indexes created Tue Sep 30 20:09:53 GMT 2025