uha_isa.c revision 1.33
1 /* $NetBSD: uha_isa.c,v 1.33 2008/04/08 20:08:50 cegger 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 1.33 2008/04/08 20:08:50 cegger 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 aprint_error_dev(&sc->sc_dev, "can't map i/o space\n"); 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 aprint_error_dev(&sc->sc_dev, "u14_find failed\n"); 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 aprint_error_dev(&sc->sc_dev, "unable to cascade DRQ, error = %d\n", error); 174 return; 175 } 176 } else { 177 /* 178 * We have a VLB controller, and can do 32-bit DMA. 179 */ 180 sc->sc_dmaflags = ISABUS_DMA_32BIT; 181 } 182 183 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 184 u14_intr, sc); 185 if (sc->sc_ih == NULL) { 186 aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt\n"); 187 return; 188 } 189 190 /* Save function pointers for later use. */ 191 sc->start_mbox = u14_start_mbox; 192 sc->poll = u14_poll; 193 sc->init = u14_init; 194 195 uha_attach(sc, &upd); 196 } 197 198 /* 199 * Start the board, ready for normal operation 200 */ 201 int 202 u14_find(iot, ioh, sc) 203 bus_space_tag_t iot; 204 bus_space_handle_t ioh; 205 struct uha_probe_data *sc; 206 { 207 u_int16_t model, config; 208 int irq, drq; 209 int resetcount = 4000; /* 4 secs? */ 210 211 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 212 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 213 if ((model & 0xfff0) != 0x5640) 214 return (0); 215 216 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 217 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 218 219 switch (model & 0x000f) { 220 case 0x0000: 221 switch (config & U14_DMA_MASK) { 222 case U14_DMA_CH5: 223 drq = 5; 224 break; 225 case U14_DMA_CH6: 226 drq = 6; 227 break; 228 case U14_DMA_CH7: 229 drq = 7; 230 break; 231 default: 232 printf("u14_find: illegal drq setting %x\n", 233 config & U14_DMA_MASK); 234 return (0); 235 } 236 break; 237 case 0x0001: 238 /* This is a 34f, and doesn't need an ISA DMA channel. */ 239 drq = -1; 240 break; 241 default: 242 printf("u14_find: unknown model %x\n", model); 243 return (0); 244 } 245 246 switch (config & U14_IRQ_MASK) { 247 case U14_IRQ10: 248 irq = 10; 249 break; 250 case U14_IRQ11: 251 irq = 11; 252 break; 253 case U14_IRQ14: 254 irq = 14; 255 break; 256 case U14_IRQ15: 257 irq = 15; 258 break; 259 default: 260 printf("u14_find: illegal irq setting %x\n", 261 config & U14_IRQ_MASK); 262 return (0); 263 } 264 265 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 266 267 while (--resetcount) { 268 if (bus_space_read_1(iot, ioh, U14_LINT)) 269 break; 270 delay(1000); /* 1 mSec per loop */ 271 } 272 if (!resetcount) { 273 printf("u14_find: board timed out during reset\n"); 274 return (0); 275 } 276 277 /* if we want to fill in softc, do so now */ 278 if (sc) { 279 sc->sc_irq = irq; 280 sc->sc_drq = drq; 281 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 282 } 283 284 return (1); 285 } 286 287 /* 288 * Function to send a command out through a mailbox 289 */ 290 void 291 u14_start_mbox(sc, mscp) 292 struct uha_softc *sc; 293 struct uha_mscp *mscp; 294 { 295 bus_space_tag_t iot = sc->sc_iot; 296 bus_space_handle_t ioh = sc->sc_ioh; 297 int spincount = 100000; /* 1s should be enough */ 298 299 while (--spincount) { 300 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 301 break; 302 delay(100); 303 } 304 if (!spincount) { 305 aprint_error_dev(&sc->sc_dev, "uha_start_mbox, board not responding\n"); 306 Debugger(); 307 } 308 309 bus_space_write_4(iot, ioh, U14_OGMPTR, 310 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 311 if (mscp->flags & MSCP_ABORT) 312 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 313 else 314 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 315 316 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 317 callout_reset(&mscp->xs->xs_callout, 318 mstohz(mscp->timeout), uha_timeout, mscp); 319 } 320 321 /* 322 * Function to poll for command completion when in poll mode. 323 * 324 * wait = timeout in msec 325 */ 326 int 327 u14_poll(sc, xs, count) 328 struct uha_softc *sc; 329 struct scsipi_xfer *xs; 330 int count; 331 { 332 bus_space_tag_t iot = sc->sc_iot; 333 bus_space_handle_t ioh = sc->sc_ioh; 334 335 while (count) { 336 /* 337 * If we had interrupts enabled, would we 338 * have got an interrupt? 339 */ 340 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 341 u14_intr(sc); 342 if (xs->xs_status & XS_STS_DONE) 343 return (0); 344 delay(1000); 345 count--; 346 } 347 return (1); 348 } 349 350 /* 351 * Catch an interrupt from the adaptor 352 */ 353 int 354 u14_intr(arg) 355 void *arg; 356 { 357 struct uha_softc *sc = arg; 358 bus_space_tag_t iot = sc->sc_iot; 359 bus_space_handle_t ioh = sc->sc_ioh; 360 struct uha_mscp *mscp; 361 u_char uhastat; 362 u_long mboxval; 363 364 #ifdef UHADEBUG 365 printf("%s: uhaintr ", device_xname(&sc->sc_dev)); 366 #endif /*UHADEBUG */ 367 368 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 369 return (0); 370 371 for (;;) { 372 /* 373 * First get all the information and then 374 * acknowledge the interrupt 375 */ 376 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 377 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 378 /* XXX Send an ABORT_ACK instead? */ 379 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 380 381 #ifdef UHADEBUG 382 printf("status = 0x%x ", uhastat); 383 #endif /*UHADEBUG*/ 384 385 /* 386 * Process the completed operation 387 */ 388 mscp = uha_mscp_phys_kv(sc, mboxval); 389 if (!mscp) { 390 printf("%s: BAD MSCP RETURNED!\n", 391 device_xname(&sc->sc_dev)); 392 continue; /* whatever it was, it'll timeout */ 393 } 394 395 callout_stop(&mscp->xs->xs_callout); 396 uha_done(sc, mscp); 397 398 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 399 return (1); 400 } 401 } 402 403 void 404 u14_init(sc) 405 struct uha_softc *sc; 406 { 407 bus_space_tag_t iot = sc->sc_iot; 408 bus_space_handle_t ioh = sc->sc_ioh; 409 410 /* make sure interrupts are enabled */ 411 #ifdef UHADEBUG 412 printf("u14_init: lmask=%02x, smask=%02x\n", 413 bus_space_read_1(iot, ioh, U14_LMASK), 414 bus_space_read_1(iot, ioh, U14_SMASK)); 415 #endif 416 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 417 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 418 } 419
Indexes created Wed Oct 01 13:09:50 GMT 2025