uha_isa.c revision 1.32
1 /* $NetBSD: uha_isa.c,v 1.32 2007/10/19 12:00:23 ad 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 1.32 2007/10/19 12:00:23 ad 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 <sys/bus.h> 52 #include <sys/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(struct device *parent, struct cfdata *match, 89 void *aux) 90 { 91 struct isa_attach_args *ia = aux; 92 bus_space_tag_t iot = ia->ia_iot; 93 bus_space_handle_t ioh; 94 struct uha_probe_data upd; 95 int rv; 96 97 if (ia->ia_nio < 1) 98 return (0); 99 if (ia->ia_nirq < 1) 100 return (0); 101 if (ia->ia_ndrq < 1) 102 return (0); 103 104 if (ISA_DIRECT_CONFIG(ia)) 105 return (0); 106 107 /* Disallow wildcarded i/o address. */ 108 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 109 return (0); 110 111 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) 112 return (0); 113 114 rv = u14_find(iot, ioh, &upd); 115 116 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 117 118 if (rv) { 119 if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && 120 ia->ia_irq[0].ir_irq != upd.sc_irq) 121 return (0); 122 if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ && 123 ia->ia_drq[0].ir_drq != upd.sc_drq) 124 return (0); 125 126 ia->ia_nio = 1; 127 ia->ia_io[0].ir_size = UHA_ISA_IOSIZE; 128 129 ia->ia_nirq = 1; 130 ia->ia_irq[0].ir_irq = upd.sc_irq; 131 132 ia->ia_ndrq = 1; 133 ia->ia_drq[0].ir_drq = upd.sc_drq; 134 135 ia->ia_niomem = 0; 136 } 137 return (rv); 138 } 139 140 /* 141 * Attach all the sub-devices we can find 142 */ 143 void 144 uha_isa_attach(struct device *parent, struct device *self, void *aux) 145 { 146 struct isa_attach_args *ia = aux; 147 struct uha_softc *sc = (void *)self; 148 bus_space_tag_t iot = ia->ia_iot; 149 bus_dma_tag_t dmat = ia->ia_dmat; 150 bus_space_handle_t ioh; 151 struct uha_probe_data upd; 152 isa_chipset_tag_t ic = ia->ia_ic; 153 int error; 154 155 printf("\n"); 156 157 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) { 158 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 159 return; 160 } 161 162 sc->sc_iot = iot; 163 sc->sc_ioh = ioh; 164 sc->sc_dmat = dmat; 165 if (!u14_find(iot, ioh, &upd)) { 166 printf("%s: u14_find failed\n", sc->sc_dev.dv_xname); 167 return; 168 } 169 170 if (upd.sc_drq != -1) { 171 sc->sc_dmaflags = 0; 172 if ((error = isa_dmacascade(ic, upd.sc_drq)) != 0) { 173 printf("%s: unable to cascade DRQ, error = %d\n", 174 sc->sc_dev.dv_xname, error); 175 return; 176 } 177 } else { 178 /* 179 * We have a VLB controller, and can do 32-bit DMA. 180 */ 181 sc->sc_dmaflags = ISABUS_DMA_32BIT; 182 } 183 184 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 185 u14_intr, sc); 186 if (sc->sc_ih == NULL) { 187 printf("%s: couldn't establish interrupt\n", 188 sc->sc_dev.dv_xname); 189 return; 190 } 191 192 /* Save function pointers for later use. */ 193 sc->start_mbox = u14_start_mbox; 194 sc->poll = u14_poll; 195 sc->init = u14_init; 196 197 uha_attach(sc, &upd); 198 } 199 200 /* 201 * Start the board, ready for normal operation 202 */ 203 int 204 u14_find(iot, ioh, sc) 205 bus_space_tag_t iot; 206 bus_space_handle_t ioh; 207 struct uha_probe_data *sc; 208 { 209 u_int16_t model, config; 210 int irq, drq; 211 int resetcount = 4000; /* 4 secs? */ 212 213 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 214 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 215 if ((model & 0xfff0) != 0x5640) 216 return (0); 217 218 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 219 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 220 221 switch (model & 0x000f) { 222 case 0x0000: 223 switch (config & U14_DMA_MASK) { 224 case U14_DMA_CH5: 225 drq = 5; 226 break; 227 case U14_DMA_CH6: 228 drq = 6; 229 break; 230 case U14_DMA_CH7: 231 drq = 7; 232 break; 233 default: 234 printf("u14_find: illegal drq setting %x\n", 235 config & U14_DMA_MASK); 236 return (0); 237 } 238 break; 239 case 0x0001: 240 /* This is a 34f, and doesn't need an ISA DMA channel. */ 241 drq = -1; 242 break; 243 default: 244 printf("u14_find: unknown model %x\n", model); 245 return (0); 246 } 247 248 switch (config & U14_IRQ_MASK) { 249 case U14_IRQ10: 250 irq = 10; 251 break; 252 case U14_IRQ11: 253 irq = 11; 254 break; 255 case U14_IRQ14: 256 irq = 14; 257 break; 258 case U14_IRQ15: 259 irq = 15; 260 break; 261 default: 262 printf("u14_find: illegal irq setting %x\n", 263 config & U14_IRQ_MASK); 264 return (0); 265 } 266 267 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 268 269 while (--resetcount) { 270 if (bus_space_read_1(iot, ioh, U14_LINT)) 271 break; 272 delay(1000); /* 1 mSec per loop */ 273 } 274 if (!resetcount) { 275 printf("u14_find: board timed out during reset\n"); 276 return (0); 277 } 278 279 /* if we want to fill in softc, do so now */ 280 if (sc) { 281 sc->sc_irq = irq; 282 sc->sc_drq = drq; 283 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 284 } 285 286 return (1); 287 } 288 289 /* 290 * Function to send a command out through a mailbox 291 */ 292 void 293 u14_start_mbox(sc, mscp) 294 struct uha_softc *sc; 295 struct uha_mscp *mscp; 296 { 297 bus_space_tag_t iot = sc->sc_iot; 298 bus_space_handle_t ioh = sc->sc_ioh; 299 int spincount = 100000; /* 1s should be enough */ 300 301 while (--spincount) { 302 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 303 break; 304 delay(100); 305 } 306 if (!spincount) { 307 printf("%s: uha_start_mbox, board not responding\n", 308 sc->sc_dev.dv_xname); 309 Debugger(); 310 } 311 312 bus_space_write_4(iot, ioh, U14_OGMPTR, 313 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 314 if (mscp->flags & MSCP_ABORT) 315 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 316 else 317 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 318 319 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 320 callout_reset(&mscp->xs->xs_callout, 321 mstohz(mscp->timeout), uha_timeout, mscp); 322 } 323 324 /* 325 * Function to poll for command completion when in poll mode. 326 * 327 * wait = timeout in msec 328 */ 329 int 330 u14_poll(sc, xs, count) 331 struct uha_softc *sc; 332 struct scsipi_xfer *xs; 333 int count; 334 { 335 bus_space_tag_t iot = sc->sc_iot; 336 bus_space_handle_t ioh = sc->sc_ioh; 337 338 while (count) { 339 /* 340 * If we had interrupts enabled, would we 341 * have got an interrupt? 342 */ 343 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 344 u14_intr(sc); 345 if (xs->xs_status & XS_STS_DONE) 346 return (0); 347 delay(1000); 348 count--; 349 } 350 return (1); 351 } 352 353 /* 354 * Catch an interrupt from the adaptor 355 */ 356 int 357 u14_intr(arg) 358 void *arg; 359 { 360 struct uha_softc *sc = arg; 361 bus_space_tag_t iot = sc->sc_iot; 362 bus_space_handle_t ioh = sc->sc_ioh; 363 struct uha_mscp *mscp; 364 u_char uhastat; 365 u_long mboxval; 366 367 #ifdef UHADEBUG 368 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 369 #endif /*UHADEBUG */ 370 371 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 372 return (0); 373 374 for (;;) { 375 /* 376 * First get all the information and then 377 * acknowledge the interrupt 378 */ 379 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 380 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 381 /* XXX Send an ABORT_ACK instead? */ 382 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 383 384 #ifdef UHADEBUG 385 printf("status = 0x%x ", uhastat); 386 #endif /*UHADEBUG*/ 387 388 /* 389 * Process the completed operation 390 */ 391 mscp = uha_mscp_phys_kv(sc, mboxval); 392 if (!mscp) { 393 printf("%s: BAD MSCP RETURNED!\n", 394 sc->sc_dev.dv_xname); 395 continue; /* whatever it was, it'll timeout */ 396 } 397 398 callout_stop(&mscp->xs->xs_callout); 399 uha_done(sc, mscp); 400 401 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 402 return (1); 403 } 404 } 405 406 void 407 u14_init(sc) 408 struct uha_softc *sc; 409 { 410 bus_space_tag_t iot = sc->sc_iot; 411 bus_space_handle_t ioh = sc->sc_ioh; 412 413 /* make sure interrupts are enabled */ 414 #ifdef UHADEBUG 415 printf("u14_init: lmask=%02x, smask=%02x\n", 416 bus_space_read_1(iot, ioh, U14_LMASK), 417 bus_space_read_1(iot, ioh, U14_SMASK)); 418 #endif 419 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 420 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 421 } 422
Indexes created Tue Sep 30 20:09:53 GMT 2025