uha_isa.c revision 1.12
1 /* $NetBSD: uha_isa.c,v 1.12 1998/02/17 03:02:56 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1996, 1997 Charles M. Hannum. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Charles M. Hannum. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/device.h> 36 #include <sys/kernel.h> 37 #include <sys/proc.h> 38 #include <sys/user.h> 39 40 #include <machine/bus.h> 41 #include <machine/intr.h> 42 43 #include <dev/scsipi/scsi_all.h> 44 #include <dev/scsipi/scsipi_all.h> 45 #include <dev/scsipi/scsiconf.h> 46 47 #include <dev/isa/isavar.h> 48 #include <dev/isa/isadmavar.h> 49 50 #include <dev/ic/uhareg.h> 51 #include <dev/ic/uhavar.h> 52 53 #define UHA_ISA_IOSIZE 16 54 55 #ifdef __BROKEN_INDIRECT_CONFIG 56 int uha_isa_probe __P((struct device *, void *, void *)); 57 #else 58 int uha_isa_probe __P((struct device *, struct cfdata *, void *)); 59 #endif 60 void uha_isa_attach __P((struct device *, struct device *, void *)); 61 62 struct cfattach uha_isa_ca = { 63 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 64 }; 65 66 #ifndef DDB 67 #define Debugger() panic("should call debugger here (uha_isa.c)") 68 #endif /* ! DDB */ 69 70 int u14_find __P((bus_space_tag_t, bus_space_handle_t, 71 struct uha_probe_data *)); 72 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 73 int u14_poll __P((struct uha_softc *, struct scsipi_xfer *, int)); 74 int u14_intr __P((void *)); 75 void u14_init __P((struct uha_softc *)); 76 77 /* 78 * Check the slots looking for a board we recognise 79 * If we find one, note it's address (slot) and call 80 * the actual probe routine to check it out. 81 */ 82 int 83 uha_isa_probe(parent, match, aux) 84 struct device *parent; 85 #ifdef __BROKEN_INDIRECT_CONFIG 86 void *match; 87 #else 88 struct cfdata *match; 89 #endif 90 void *aux; 91 { 92 struct isa_attach_args *ia = aux; 93 bus_space_tag_t iot = ia->ia_iot; 94 bus_space_handle_t ioh; 95 struct uha_probe_data upd; 96 int rv; 97 98 /* Disallow wildcarded i/o address. */ 99 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 100 return (0); 101 102 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 103 return (0); 104 105 rv = u14_find(iot, ioh, &upd); 106 107 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 108 109 if (rv) { 110 if (ia->ia_irq != -1 && ia->ia_irq != upd.sc_irq) 111 return (0); 112 if (ia->ia_drq != -1 && ia->ia_drq != upd.sc_drq) 113 return (0); 114 ia->ia_irq = upd.sc_irq; 115 ia->ia_drq = upd.sc_drq; 116 ia->ia_msize = 0; 117 ia->ia_iosize = UHA_ISA_IOSIZE; 118 } 119 return (rv); 120 } 121 122 /* 123 * Attach all the sub-devices we can find 124 */ 125 void 126 uha_isa_attach(parent, self, aux) 127 struct device *parent, *self; 128 void *aux; 129 { 130 struct isa_attach_args *ia = aux; 131 struct uha_softc *sc = (void *)self; 132 bus_space_tag_t iot = ia->ia_iot; 133 bus_dma_tag_t dmat = ia->ia_dmat; 134 bus_space_handle_t ioh; 135 struct uha_probe_data upd; 136 isa_chipset_tag_t ic = ia->ia_ic; 137 138 printf("\n"); 139 140 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) { 141 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 142 return; 143 } 144 145 sc->sc_iot = iot; 146 sc->sc_ioh = ioh; 147 sc->sc_dmat = dmat; 148 if (!u14_find(iot, ioh, &upd)) { 149 printf("%s: u14_find failed\n", sc->sc_dev.dv_xname); 150 return; 151 } 152 153 if (upd.sc_drq != -1) { 154 sc->sc_dmaflags = 0; 155 isa_dmacascade(parent, upd.sc_drq); 156 } else { 157 /* 158 * We have a VLB controller, and can do 32-bit DMA. 159 */ 160 sc->sc_dmaflags = ISABUS_DMA_32BIT; 161 } 162 163 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 164 u14_intr, sc); 165 if (sc->sc_ih == NULL) { 166 printf("%s: couldn't establish interrupt\n", 167 sc->sc_dev.dv_xname); 168 return; 169 } 170 171 /* Save function pointers for later use. */ 172 sc->start_mbox = u14_start_mbox; 173 sc->poll = u14_poll; 174 sc->init = u14_init; 175 176 uha_attach(sc, &upd); 177 } 178 179 /* 180 * Start the board, ready for normal operation 181 */ 182 int 183 u14_find(iot, ioh, sc) 184 bus_space_tag_t iot; 185 bus_space_handle_t ioh; 186 struct uha_probe_data *sc; 187 { 188 u_int16_t model, config; 189 int irq, drq; 190 int resetcount = 4000; /* 4 secs? */ 191 192 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 193 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 194 if ((model & 0xfff0) != 0x5640) 195 return (0); 196 197 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 198 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 199 200 switch (model & 0x000f) { 201 case 0x0000: 202 switch (config & U14_DMA_MASK) { 203 case U14_DMA_CH5: 204 drq = 5; 205 break; 206 case U14_DMA_CH6: 207 drq = 6; 208 break; 209 case U14_DMA_CH7: 210 drq = 7; 211 break; 212 default: 213 printf("u14_find: illegal drq setting %x\n", 214 config & U14_DMA_MASK); 215 return (0); 216 } 217 break; 218 case 0x0001: 219 /* This is a 34f, and doesn't need an ISA DMA channel. */ 220 drq = -1; 221 break; 222 default: 223 printf("u14_find: unknown model %x\n", model); 224 return (0); 225 } 226 227 switch (config & U14_IRQ_MASK) { 228 case U14_IRQ10: 229 irq = 10; 230 break; 231 case U14_IRQ11: 232 irq = 11; 233 break; 234 case U14_IRQ14: 235 irq = 14; 236 break; 237 case U14_IRQ15: 238 irq = 15; 239 break; 240 default: 241 printf("u14_find: illegal irq setting %x\n", 242 config & U14_IRQ_MASK); 243 return (0); 244 } 245 246 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 247 248 while (--resetcount) { 249 if (bus_space_read_1(iot, ioh, U14_LINT)) 250 break; 251 delay(1000); /* 1 mSec per loop */ 252 } 253 if (!resetcount) { 254 printf("u14_find: board timed out during reset\n"); 255 return (0); 256 } 257 258 /* if we want to fill in softc, do so now */ 259 if (sc) { 260 sc->sc_irq = irq; 261 sc->sc_drq = drq; 262 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 263 } 264 265 return (1); 266 } 267 268 /* 269 * Function to send a command out through a mailbox 270 */ 271 void 272 u14_start_mbox(sc, mscp) 273 struct uha_softc *sc; 274 struct uha_mscp *mscp; 275 { 276 bus_space_tag_t iot = sc->sc_iot; 277 bus_space_handle_t ioh = sc->sc_ioh; 278 int spincount = 100000; /* 1s should be enough */ 279 280 while (--spincount) { 281 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 282 break; 283 delay(100); 284 } 285 if (!spincount) { 286 printf("%s: uha_start_mbox, board not responding\n", 287 sc->sc_dev.dv_xname); 288 Debugger(); 289 } 290 291 bus_space_write_4(iot, ioh, U14_OGMPTR, 292 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 293 if (mscp->flags & MSCP_ABORT) 294 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 295 else 296 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 297 298 if ((mscp->xs->flags & SCSI_POLL) == 0) 299 timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000); 300 } 301 302 /* 303 * Function to poll for command completion when in poll mode. 304 * 305 * wait = timeout in msec 306 */ 307 int 308 u14_poll(sc, xs, count) 309 struct uha_softc *sc; 310 struct scsipi_xfer *xs; 311 int count; 312 { 313 bus_space_tag_t iot = sc->sc_iot; 314 bus_space_handle_t ioh = sc->sc_ioh; 315 316 while (count) { 317 /* 318 * If we had interrupts enabled, would we 319 * have got an interrupt? 320 */ 321 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 322 u14_intr(sc); 323 if (xs->flags & ITSDONE) 324 return (0); 325 delay(1000); 326 count--; 327 } 328 return (1); 329 } 330 331 /* 332 * Catch an interrupt from the adaptor 333 */ 334 int 335 u14_intr(arg) 336 void *arg; 337 { 338 struct uha_softc *sc = arg; 339 bus_space_tag_t iot = sc->sc_iot; 340 bus_space_handle_t ioh = sc->sc_ioh; 341 struct uha_mscp *mscp; 342 u_char uhastat; 343 u_long mboxval; 344 345 #ifdef UHADEBUG 346 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 347 #endif /*UHADEBUG */ 348 349 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 350 return (0); 351 352 for (;;) { 353 /* 354 * First get all the information and then 355 * acknowledge the interrupt 356 */ 357 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 358 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 359 /* XXX Send an ABORT_ACK instead? */ 360 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 361 362 #ifdef UHADEBUG 363 printf("status = 0x%x ", uhastat); 364 #endif /*UHADEBUG*/ 365 366 /* 367 * Process the completed operation 368 */ 369 mscp = uha_mscp_phys_kv(sc, mboxval); 370 if (!mscp) { 371 printf("%s: BAD MSCP RETURNED!\n", 372 sc->sc_dev.dv_xname); 373 continue; /* whatever it was, it'll timeout */ 374 } 375 376 untimeout(uha_timeout, mscp); 377 uha_done(sc, mscp); 378 379 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 380 return (1); 381 } 382 } 383 384 void 385 u14_init(sc) 386 struct uha_softc *sc; 387 { 388 bus_space_tag_t iot = sc->sc_iot; 389 bus_space_handle_t ioh = sc->sc_ioh; 390 391 /* make sure interrupts are enabled */ 392 #ifdef UHADEBUG 393 printf("u14_init: lmask=%02x, smask=%02x\n", 394 bus_space_read_1(iot, ioh, U14_LMASK), 395 bus_space_read_1(iot, ioh, U14_SMASK)); 396 #endif 397 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 398 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 399 } 400
Indexes created Tue Sep 30 20:09:53 GMT 2025