uha_isa.c revision 1.28
1 /* $NetBSD: uha_isa.c,v 1.28 2005/02/04 02:10:41 perry 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 1.28 2005/02/04 02:10:41 perry 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(struct device *, struct cfdata *, void *); 67 void uha_isa_attach(struct device *, struct device *, void *); 68 69 CFATTACH_DECL(uha_isa, sizeof(struct uha_softc), 70 uha_isa_probe, uha_isa_attach, NULL, NULL); 71 72 #ifndef DDB 73 #define Debugger() panic("should call debugger here (uha_isa.c)") 74 #endif /* ! DDB */ 75 76 int u14_find(bus_space_tag_t, bus_space_handle_t, struct uha_probe_data *); 77 void u14_start_mbox(struct uha_softc *, struct uha_mscp *); 78 int u14_poll(struct uha_softc *, struct scsipi_xfer *, int); 79 int u14_intr(void *); 80 void u14_init(struct uha_softc *); 81 82 /* 83 * Check the slots looking for a board we recognise 84 * If we find one, note it's address (slot) and call 85 * the actual probe routine to check it out. 86 */ 87 int 88 uha_isa_probe(parent, match, aux) 89 struct device *parent; 90 struct cfdata *match; 91 void *aux; 92 { 93 struct isa_attach_args *ia = aux; 94 bus_space_tag_t iot = ia->ia_iot; 95 bus_space_handle_t ioh; 96 struct uha_probe_data upd; 97 int rv; 98 99 if (ia->ia_nio < 1) 100 return (0); 101 if (ia->ia_nirq < 1) 102 return (0); 103 if (ia->ia_ndrq < 1) 104 return (0); 105 106 if (ISA_DIRECT_CONFIG(ia)) 107 return (0); 108 109 /* Disallow wildcarded i/o address. */ 110 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 111 return (0); 112 113 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) 114 return (0); 115 116 rv = u14_find(iot, ioh, &upd); 117 118 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 119 120 if (rv) { 121 if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && 122 ia->ia_irq[0].ir_irq != upd.sc_irq) 123 return (0); 124 if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ && 125 ia->ia_drq[0].ir_drq != upd.sc_drq) 126 return (0); 127 128 ia->ia_nio = 1; 129 ia->ia_io[0].ir_size = UHA_ISA_IOSIZE; 130 131 ia->ia_nirq = 1; 132 ia->ia_irq[0].ir_irq = upd.sc_irq; 133 134 ia->ia_ndrq = 1; 135 ia->ia_drq[0].ir_drq = upd.sc_drq; 136 137 ia->ia_niomem = 0; 138 } 139 return (rv); 140 } 141 142 /* 143 * Attach all the sub-devices we can find 144 */ 145 void 146 uha_isa_attach(parent, self, aux) 147 struct device *parent, *self; 148 void *aux; 149 { 150 struct isa_attach_args *ia = aux; 151 struct uha_softc *sc = (void *)self; 152 bus_space_tag_t iot = ia->ia_iot; 153 bus_dma_tag_t dmat = ia->ia_dmat; 154 bus_space_handle_t ioh; 155 struct uha_probe_data upd; 156 isa_chipset_tag_t ic = ia->ia_ic; 157 int error; 158 159 printf("\n"); 160 161 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) { 162 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 163 return; 164 } 165 166 sc->sc_iot = iot; 167 sc->sc_ioh = ioh; 168 sc->sc_dmat = dmat; 169 if (!u14_find(iot, ioh, &upd)) { 170 printf("%s: u14_find failed\n", sc->sc_dev.dv_xname); 171 return; 172 } 173 174 if (upd.sc_drq != -1) { 175 sc->sc_dmaflags = 0; 176 if ((error = isa_dmacascade(ic, upd.sc_drq)) != 0) { 177 printf("%s: unable to cascade DRQ, error = %d\n", 178 sc->sc_dev.dv_xname, error); 179 return; 180 } 181 } else { 182 /* 183 * We have a VLB controller, and can do 32-bit DMA. 184 */ 185 sc->sc_dmaflags = ISABUS_DMA_32BIT; 186 } 187 188 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 189 u14_intr, sc); 190 if (sc->sc_ih == NULL) { 191 printf("%s: couldn't establish interrupt\n", 192 sc->sc_dev.dv_xname); 193 return; 194 } 195 196 /* Save function pointers for later use. */ 197 sc->start_mbox = u14_start_mbox; 198 sc->poll = u14_poll; 199 sc->init = u14_init; 200 201 uha_attach(sc, &upd); 202 } 203 204 /* 205 * Start the board, ready for normal operation 206 */ 207 int 208 u14_find(iot, ioh, sc) 209 bus_space_tag_t iot; 210 bus_space_handle_t ioh; 211 struct uha_probe_data *sc; 212 { 213 u_int16_t model, config; 214 int irq, drq; 215 int resetcount = 4000; /* 4 secs? */ 216 217 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 218 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 219 if ((model & 0xfff0) != 0x5640) 220 return (0); 221 222 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 223 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 224 225 switch (model & 0x000f) { 226 case 0x0000: 227 switch (config & U14_DMA_MASK) { 228 case U14_DMA_CH5: 229 drq = 5; 230 break; 231 case U14_DMA_CH6: 232 drq = 6; 233 break; 234 case U14_DMA_CH7: 235 drq = 7; 236 break; 237 default: 238 printf("u14_find: illegal drq setting %x\n", 239 config & U14_DMA_MASK); 240 return (0); 241 } 242 break; 243 case 0x0001: 244 /* This is a 34f, and doesn't need an ISA DMA channel. */ 245 drq = -1; 246 break; 247 default: 248 printf("u14_find: unknown model %x\n", model); 249 return (0); 250 } 251 252 switch (config & U14_IRQ_MASK) { 253 case U14_IRQ10: 254 irq = 10; 255 break; 256 case U14_IRQ11: 257 irq = 11; 258 break; 259 case U14_IRQ14: 260 irq = 14; 261 break; 262 case U14_IRQ15: 263 irq = 15; 264 break; 265 default: 266 printf("u14_find: illegal irq setting %x\n", 267 config & U14_IRQ_MASK); 268 return (0); 269 } 270 271 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 272 273 while (--resetcount) { 274 if (bus_space_read_1(iot, ioh, U14_LINT)) 275 break; 276 delay(1000); /* 1 mSec per loop */ 277 } 278 if (!resetcount) { 279 printf("u14_find: board timed out during reset\n"); 280 return (0); 281 } 282 283 /* if we want to fill in softc, do so now */ 284 if (sc) { 285 sc->sc_irq = irq; 286 sc->sc_drq = drq; 287 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 288 } 289 290 return (1); 291 } 292 293 /* 294 * Function to send a command out through a mailbox 295 */ 296 void 297 u14_start_mbox(sc, mscp) 298 struct uha_softc *sc; 299 struct uha_mscp *mscp; 300 { 301 bus_space_tag_t iot = sc->sc_iot; 302 bus_space_handle_t ioh = sc->sc_ioh; 303 int spincount = 100000; /* 1s should be enough */ 304 305 while (--spincount) { 306 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 307 break; 308 delay(100); 309 } 310 if (!spincount) { 311 printf("%s: uha_start_mbox, board not responding\n", 312 sc->sc_dev.dv_xname); 313 Debugger(); 314 } 315 316 bus_space_write_4(iot, ioh, U14_OGMPTR, 317 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 318 if (mscp->flags & MSCP_ABORT) 319 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 320 else 321 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 322 323 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 324 callout_reset(&mscp->xs->xs_callout, 325 mstohz(mscp->timeout), uha_timeout, mscp); 326 } 327 328 /* 329 * Function to poll for command completion when in poll mode. 330 * 331 * wait = timeout in msec 332 */ 333 int 334 u14_poll(sc, xs, count) 335 struct uha_softc *sc; 336 struct scsipi_xfer *xs; 337 int count; 338 { 339 bus_space_tag_t iot = sc->sc_iot; 340 bus_space_handle_t ioh = sc->sc_ioh; 341 342 while (count) { 343 /* 344 * If we had interrupts enabled, would we 345 * have got an interrupt? 346 */ 347 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 348 u14_intr(sc); 349 if (xs->xs_status & XS_STS_DONE) 350 return (0); 351 delay(1000); 352 count--; 353 } 354 return (1); 355 } 356 357 /* 358 * Catch an interrupt from the adaptor 359 */ 360 int 361 u14_intr(arg) 362 void *arg; 363 { 364 struct uha_softc *sc = arg; 365 bus_space_tag_t iot = sc->sc_iot; 366 bus_space_handle_t ioh = sc->sc_ioh; 367 struct uha_mscp *mscp; 368 u_char uhastat; 369 u_long mboxval; 370 371 #ifdef UHADEBUG 372 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 373 #endif /*UHADEBUG */ 374 375 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 376 return (0); 377 378 for (;;) { 379 /* 380 * First get all the information and then 381 * acknowledge the interrupt 382 */ 383 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 384 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 385 /* XXX Send an ABORT_ACK instead? */ 386 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 387 388 #ifdef UHADEBUG 389 printf("status = 0x%x ", uhastat); 390 #endif /*UHADEBUG*/ 391 392 /* 393 * Process the completed operation 394 */ 395 mscp = uha_mscp_phys_kv(sc, mboxval); 396 if (!mscp) { 397 printf("%s: BAD MSCP RETURNED!\n", 398 sc->sc_dev.dv_xname); 399 continue; /* whatever it was, it'll timeout */ 400 } 401 402 callout_stop(&mscp->xs->xs_callout); 403 uha_done(sc, mscp); 404 405 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 406 return (1); 407 } 408 } 409 410 void 411 u14_init(sc) 412 struct uha_softc *sc; 413 { 414 bus_space_tag_t iot = sc->sc_iot; 415 bus_space_handle_t ioh = sc->sc_ioh; 416 417 /* make sure interrupts are enabled */ 418 #ifdef UHADEBUG 419 printf("u14_init: lmask=%02x, smask=%02x\n", 420 bus_space_read_1(iot, ioh, U14_LMASK), 421 bus_space_read_1(iot, ioh, U14_SMASK)); 422 #endif 423 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 424 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 425 } 426
Indexes created Wed Oct 01 07:09:59 GMT 2025