uha_isa.c revision 1.23
1 /* $NetBSD: uha_isa.c,v 1.23 2002/04/05 18:27:55 bouyer 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 1.23 2002/04/05 18:27:55 bouyer Exp $"); 41 42 #include "opt_ddb.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 #include <sys/kernel.h> 48 #include <sys/proc.h> 49 #include <sys/user.h> 50 51 #include <machine/bus.h> 52 #include <machine/intr.h> 53 54 #include <dev/scsipi/scsi_all.h> 55 #include <dev/scsipi/scsipi_all.h> 56 #include <dev/scsipi/scsiconf.h> 57 58 #include <dev/isa/isavar.h> 59 #include <dev/isa/isadmavar.h> 60 61 #include <dev/ic/uhareg.h> 62 #include <dev/ic/uhavar.h> 63 64 #define UHA_ISA_IOSIZE 16 65 66 int uha_isa_probe __P((struct device *, struct cfdata *, void *)); 67 void uha_isa_attach __P((struct device *, struct device *, void *)); 68 69 struct cfattach uha_isa_ca = { 70 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 71 }; 72 73 #ifndef DDB 74 #define Debugger() panic("should call debugger here (uha_isa.c)") 75 #endif /* ! DDB */ 76 77 int u14_find __P((bus_space_tag_t, bus_space_handle_t, 78 struct uha_probe_data *)); 79 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 80 int u14_poll __P((struct uha_softc *, struct scsipi_xfer *, int)); 81 int u14_intr __P((void *)); 82 void u14_init __P((struct uha_softc *)); 83 84 /* 85 * Check the slots looking for a board we recognise 86 * If we find one, note it's address (slot) and call 87 * the actual probe routine to check it out. 88 */ 89 int 90 uha_isa_probe(parent, match, aux) 91 struct device *parent; 92 struct cfdata *match; 93 void *aux; 94 { 95 struct isa_attach_args *ia = aux; 96 bus_space_tag_t iot = ia->ia_iot; 97 bus_space_handle_t ioh; 98 struct uha_probe_data upd; 99 int rv; 100 101 if (ia->ia_nio < 1) 102 return (0); 103 if (ia->ia_nirq < 1) 104 return (0); 105 if (ia->ia_ndrq < 1) 106 return (0); 107 108 if (ISA_DIRECT_CONFIG(ia)) 109 return (0); 110 111 /* Disallow wildcarded i/o address. */ 112 if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT) 113 return (0); 114 115 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) 116 return (0); 117 118 rv = u14_find(iot, ioh, &upd); 119 120 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 121 122 if (rv) { 123 if (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT && 124 ia->ia_irq[0].ir_irq != upd.sc_irq) 125 return (0); 126 if (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT && 127 ia->ia_drq[0].ir_drq != upd.sc_drq) 128 return (0); 129 130 ia->ia_nio = 1; 131 ia->ia_io[0].ir_size = UHA_ISA_IOSIZE; 132 133 ia->ia_nirq = 1; 134 ia->ia_irq[0].ir_irq = upd.sc_irq; 135 136 ia->ia_ndrq = 1; 137 ia->ia_drq[0].ir_drq = upd.sc_drq; 138 139 ia->ia_niomem = 0; 140 } 141 return (rv); 142 } 143 144 /* 145 * Attach all the sub-devices we can find 146 */ 147 void 148 uha_isa_attach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151 { 152 struct isa_attach_args *ia = aux; 153 struct uha_softc *sc = (void *)self; 154 bus_space_tag_t iot = ia->ia_iot; 155 bus_dma_tag_t dmat = ia->ia_dmat; 156 bus_space_handle_t ioh; 157 struct uha_probe_data upd; 158 isa_chipset_tag_t ic = ia->ia_ic; 159 int error; 160 161 printf("\n"); 162 163 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) { 164 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 165 return; 166 } 167 168 sc->sc_iot = iot; 169 sc->sc_ioh = ioh; 170 sc->sc_dmat = dmat; 171 if (!u14_find(iot, ioh, &upd)) { 172 printf("%s: u14_find failed\n", sc->sc_dev.dv_xname); 173 return; 174 } 175 176 if (upd.sc_drq != -1) { 177 sc->sc_dmaflags = 0; 178 if ((error = isa_dmacascade(ic, upd.sc_drq)) != 0) { 179 printf("%s: unable to cascade DRQ, error = %d\n", 180 sc->sc_dev.dv_xname, error); 181 return; 182 } 183 } else { 184 /* 185 * We have a VLB controller, and can do 32-bit DMA. 186 */ 187 sc->sc_dmaflags = ISABUS_DMA_32BIT; 188 } 189 190 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 191 u14_intr, sc); 192 if (sc->sc_ih == NULL) { 193 printf("%s: couldn't establish interrupt\n", 194 sc->sc_dev.dv_xname); 195 return; 196 } 197 198 /* Save function pointers for later use. */ 199 sc->start_mbox = u14_start_mbox; 200 sc->poll = u14_poll; 201 sc->init = u14_init; 202 203 uha_attach(sc, &upd); 204 } 205 206 /* 207 * Start the board, ready for normal operation 208 */ 209 int 210 u14_find(iot, ioh, sc) 211 bus_space_tag_t iot; 212 bus_space_handle_t ioh; 213 struct uha_probe_data *sc; 214 { 215 u_int16_t model, config; 216 int irq, drq; 217 int resetcount = 4000; /* 4 secs? */ 218 219 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 220 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 221 if ((model & 0xfff0) != 0x5640) 222 return (0); 223 224 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 225 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 226 227 switch (model & 0x000f) { 228 case 0x0000: 229 switch (config & U14_DMA_MASK) { 230 case U14_DMA_CH5: 231 drq = 5; 232 break; 233 case U14_DMA_CH6: 234 drq = 6; 235 break; 236 case U14_DMA_CH7: 237 drq = 7; 238 break; 239 default: 240 printf("u14_find: illegal drq setting %x\n", 241 config & U14_DMA_MASK); 242 return (0); 243 } 244 break; 245 case 0x0001: 246 /* This is a 34f, and doesn't need an ISA DMA channel. */ 247 drq = -1; 248 break; 249 default: 250 printf("u14_find: unknown model %x\n", model); 251 return (0); 252 } 253 254 switch (config & U14_IRQ_MASK) { 255 case U14_IRQ10: 256 irq = 10; 257 break; 258 case U14_IRQ11: 259 irq = 11; 260 break; 261 case U14_IRQ14: 262 irq = 14; 263 break; 264 case U14_IRQ15: 265 irq = 15; 266 break; 267 default: 268 printf("u14_find: illegal irq setting %x\n", 269 config & U14_IRQ_MASK); 270 return (0); 271 } 272 273 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 274 275 while (--resetcount) { 276 if (bus_space_read_1(iot, ioh, U14_LINT)) 277 break; 278 delay(1000); /* 1 mSec per loop */ 279 } 280 if (!resetcount) { 281 printf("u14_find: board timed out during reset\n"); 282 return (0); 283 } 284 285 /* if we want to fill in softc, do so now */ 286 if (sc) { 287 sc->sc_irq = irq; 288 sc->sc_drq = drq; 289 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 290 } 291 292 return (1); 293 } 294 295 /* 296 * Function to send a command out through a mailbox 297 */ 298 void 299 u14_start_mbox(sc, mscp) 300 struct uha_softc *sc; 301 struct uha_mscp *mscp; 302 { 303 bus_space_tag_t iot = sc->sc_iot; 304 bus_space_handle_t ioh = sc->sc_ioh; 305 int spincount = 100000; /* 1s should be enough */ 306 307 while (--spincount) { 308 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 309 break; 310 delay(100); 311 } 312 if (!spincount) { 313 printf("%s: uha_start_mbox, board not responding\n", 314 sc->sc_dev.dv_xname); 315 Debugger(); 316 } 317 318 bus_space_write_4(iot, ioh, U14_OGMPTR, 319 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 320 if (mscp->flags & MSCP_ABORT) 321 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 322 else 323 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 324 325 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 326 callout_reset(&mscp->xs->xs_callout, 327 mstohz(mscp->timeout), uha_timeout, mscp); 328 } 329 330 /* 331 * Function to poll for command completion when in poll mode. 332 * 333 * wait = timeout in msec 334 */ 335 int 336 u14_poll(sc, xs, count) 337 struct uha_softc *sc; 338 struct scsipi_xfer *xs; 339 int count; 340 { 341 bus_space_tag_t iot = sc->sc_iot; 342 bus_space_handle_t ioh = sc->sc_ioh; 343 344 while (count) { 345 /* 346 * If we had interrupts enabled, would we 347 * have got an interrupt? 348 */ 349 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 350 u14_intr(sc); 351 if (xs->xs_status & XS_STS_DONE) 352 return (0); 353 delay(1000); 354 count--; 355 } 356 return (1); 357 } 358 359 /* 360 * Catch an interrupt from the adaptor 361 */ 362 int 363 u14_intr(arg) 364 void *arg; 365 { 366 struct uha_softc *sc = arg; 367 bus_space_tag_t iot = sc->sc_iot; 368 bus_space_handle_t ioh = sc->sc_ioh; 369 struct uha_mscp *mscp; 370 u_char uhastat; 371 u_long mboxval; 372 373 #ifdef UHADEBUG 374 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 375 #endif /*UHADEBUG */ 376 377 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 378 return (0); 379 380 for (;;) { 381 /* 382 * First get all the information and then 383 * acknowledge the interrupt 384 */ 385 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 386 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 387 /* XXX Send an ABORT_ACK instead? */ 388 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 389 390 #ifdef UHADEBUG 391 printf("status = 0x%x ", uhastat); 392 #endif /*UHADEBUG*/ 393 394 /* 395 * Process the completed operation 396 */ 397 mscp = uha_mscp_phys_kv(sc, mboxval); 398 if (!mscp) { 399 printf("%s: BAD MSCP RETURNED!\n", 400 sc->sc_dev.dv_xname); 401 continue; /* whatever it was, it'll timeout */ 402 } 403 404 callout_stop(&mscp->xs->xs_callout); 405 uha_done(sc, mscp); 406 407 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 408 return (1); 409 } 410 } 411 412 void 413 u14_init(sc) 414 struct uha_softc *sc; 415 { 416 bus_space_tag_t iot = sc->sc_iot; 417 bus_space_handle_t ioh = sc->sc_ioh; 418 419 /* make sure interrupts are enabled */ 420 #ifdef UHADEBUG 421 printf("u14_init: lmask=%02x, smask=%02x\n", 422 bus_space_read_1(iot, ioh, U14_LMASK), 423 bus_space_read_1(iot, ioh, U14_SMASK)); 424 #endif 425 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 426 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 427 } 428
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