uha_isa.c revision 1.10
1 /* $NetBSD: uha_isa.c,v 1.10 1997/10/19 18:57:17 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 panic("uha_isa_attach: bus_space_map failed!"); 142 143 sc->sc_iot = iot; 144 sc->sc_ioh = ioh; 145 sc->sc_dmat = dmat; 146 if (!u14_find(iot, ioh, &upd)) 147 panic("uha_isa_attach: u14_find failed!"); 148 149 if (upd.sc_drq != -1) { 150 sc->sc_dmaflags = 0; 151 isa_dmacascade(parent, upd.sc_drq); 152 } else { 153 /* 154 * We have a VLB controller, and can do 32-bit DMA. 155 */ 156 sc->sc_dmaflags = ISABUS_DMA_32BIT; 157 } 158 159 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 160 u14_intr, sc); 161 if (sc->sc_ih == NULL) { 162 printf("%s: couldn't establish interrupt\n", 163 sc->sc_dev.dv_xname); 164 return; 165 } 166 167 /* Save function pointers for later use. */ 168 sc->start_mbox = u14_start_mbox; 169 sc->poll = u14_poll; 170 sc->init = u14_init; 171 172 uha_attach(sc, &upd); 173 } 174 175 /* 176 * Start the board, ready for normal operation 177 */ 178 int 179 u14_find(iot, ioh, sc) 180 bus_space_tag_t iot; 181 bus_space_handle_t ioh; 182 struct uha_probe_data *sc; 183 { 184 u_int16_t model, config; 185 int irq, drq; 186 int resetcount = 4000; /* 4 secs? */ 187 188 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 189 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 190 if ((model & 0xfff0) != 0x5640) 191 return (0); 192 193 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 194 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 195 196 switch (model & 0x000f) { 197 case 0x0000: 198 switch (config & U14_DMA_MASK) { 199 case U14_DMA_CH5: 200 drq = 5; 201 break; 202 case U14_DMA_CH6: 203 drq = 6; 204 break; 205 case U14_DMA_CH7: 206 drq = 7; 207 break; 208 default: 209 printf("u14_find: illegal drq setting %x\n", 210 config & U14_DMA_MASK); 211 return (0); 212 } 213 break; 214 case 0x0001: 215 /* This is a 34f, and doesn't need an ISA DMA channel. */ 216 drq = -1; 217 break; 218 default: 219 printf("u14_find: unknown model %x\n", model); 220 return (0); 221 } 222 223 switch (config & U14_IRQ_MASK) { 224 case U14_IRQ10: 225 irq = 10; 226 break; 227 case U14_IRQ11: 228 irq = 11; 229 break; 230 case U14_IRQ14: 231 irq = 14; 232 break; 233 case U14_IRQ15: 234 irq = 15; 235 break; 236 default: 237 printf("u14_find: illegal irq setting %x\n", 238 config & U14_IRQ_MASK); 239 return (0); 240 } 241 242 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 243 244 while (--resetcount) { 245 if (bus_space_read_1(iot, ioh, U14_LINT)) 246 break; 247 delay(1000); /* 1 mSec per loop */ 248 } 249 if (!resetcount) { 250 printf("u14_find: board timed out during reset\n"); 251 return (0); 252 } 253 254 /* if we want to fill in softc, do so now */ 255 if (sc) { 256 sc->sc_irq = irq; 257 sc->sc_drq = drq; 258 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 259 } 260 261 return (1); 262 } 263 264 /* 265 * Function to send a command out through a mailbox 266 */ 267 void 268 u14_start_mbox(sc, mscp) 269 struct uha_softc *sc; 270 struct uha_mscp *mscp; 271 { 272 bus_space_tag_t iot = sc->sc_iot; 273 bus_space_handle_t ioh = sc->sc_ioh; 274 int spincount = 100000; /* 1s should be enough */ 275 276 while (--spincount) { 277 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 278 break; 279 delay(100); 280 } 281 if (!spincount) { 282 printf("%s: uha_start_mbox, board not responding\n", 283 sc->sc_dev.dv_xname); 284 Debugger(); 285 } 286 287 bus_space_write_4(iot, ioh, U14_OGMPTR, 288 mscp->dmamap_self->dm_segs[0].ds_addr); 289 if (mscp->flags & MSCP_ABORT) 290 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 291 else 292 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 293 294 if ((mscp->xs->flags & SCSI_POLL) == 0) 295 timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000); 296 } 297 298 /* 299 * Function to poll for command completion when in poll mode. 300 * 301 * wait = timeout in msec 302 */ 303 int 304 u14_poll(sc, xs, count) 305 struct uha_softc *sc; 306 struct scsipi_xfer *xs; 307 int count; 308 { 309 bus_space_tag_t iot = sc->sc_iot; 310 bus_space_handle_t ioh = sc->sc_ioh; 311 312 while (count) { 313 /* 314 * If we had interrupts enabled, would we 315 * have got an interrupt? 316 */ 317 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 318 u14_intr(sc); 319 if (xs->flags & ITSDONE) 320 return (0); 321 delay(1000); 322 count--; 323 } 324 return (1); 325 } 326 327 /* 328 * Catch an interrupt from the adaptor 329 */ 330 int 331 u14_intr(arg) 332 void *arg; 333 { 334 struct uha_softc *sc = arg; 335 bus_space_tag_t iot = sc->sc_iot; 336 bus_space_handle_t ioh = sc->sc_ioh; 337 struct uha_mscp *mscp; 338 u_char uhastat; 339 u_long mboxval; 340 341 #ifdef UHADEBUG 342 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 343 #endif /*UHADEBUG */ 344 345 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 346 return (0); 347 348 for (;;) { 349 /* 350 * First get all the information and then 351 * acknowledge the interrupt 352 */ 353 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 354 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 355 /* XXX Send an ABORT_ACK instead? */ 356 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 357 358 #ifdef UHADEBUG 359 printf("status = 0x%x ", uhastat); 360 #endif /*UHADEBUG*/ 361 362 /* 363 * Process the completed operation 364 */ 365 mscp = uha_mscp_phys_kv(sc, mboxval); 366 if (!mscp) { 367 printf("%s: BAD MSCP RETURNED!\n", 368 sc->sc_dev.dv_xname); 369 continue; /* whatever it was, it'll timeout */ 370 } 371 372 untimeout(uha_timeout, mscp); 373 uha_done(sc, mscp); 374 375 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 376 return (1); 377 } 378 } 379 380 void 381 u14_init(sc) 382 struct uha_softc *sc; 383 { 384 bus_space_tag_t iot = sc->sc_iot; 385 bus_space_handle_t ioh = sc->sc_ioh; 386 387 /* make sure interrupts are enabled */ 388 #ifdef UHADEBUG 389 printf("u14_init: lmask=%02x, smask=%02x\n", 390 bus_space_read_1(iot, ioh, U14_LMASK), 391 bus_space_read_1(iot, ioh, U14_SMASK)); 392 #endif 393 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 394 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 395 } 396
Indexes created Wed Oct 01 07:09:59 GMT 2025