uha_isa.c revision 1.8
1 /* $NetBSD: uha_isa.c,v 1.8 1997/06/06 23:44:05 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 <scsi/scsi_all.h> 44 #include <scsi/scsiconf.h> 45 46 #include <dev/isa/isavar.h> 47 #include <dev/isa/isadmavar.h> 48 49 #include <dev/ic/uhareg.h> 50 #include <dev/ic/uhavar.h> 51 52 #define UHA_ISA_IOSIZE 16 53 54 #ifdef __BROKEN_INDIRECT_CONFIG 55 int uha_isa_probe __P((struct device *, void *, void *)); 56 #else 57 int uha_isa_probe __P((struct device *, struct cfdata *, void *)); 58 #endif 59 void uha_isa_attach __P((struct device *, struct device *, void *)); 60 61 struct cfattach uha_isa_ca = { 62 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 63 }; 64 65 #ifndef DDB 66 #define Debugger() panic("should call debugger here (uha_isa.c)") 67 #endif /* ! DDB */ 68 69 int u14_find __P((bus_space_tag_t, bus_space_handle_t, 70 struct uha_probe_data *)); 71 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 72 int u14_poll __P((struct uha_softc *, struct scsi_xfer *, int)); 73 int u14_intr __P((void *)); 74 void u14_init __P((struct uha_softc *)); 75 76 /* 77 * Check the slots looking for a board we recognise 78 * If we find one, note it's address (slot) and call 79 * the actual probe routine to check it out. 80 */ 81 int 82 uha_isa_probe(parent, match, aux) 83 struct device *parent; 84 #ifdef __BROKEN_INDIRECT_CONFIG 85 void *match; 86 #else 87 struct cfdata *match; 88 #endif 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 (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 98 return (0); 99 100 rv = u14_find(iot, ioh, &upd); 101 102 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 103 104 if (rv) { 105 if (ia->ia_irq != -1 && ia->ia_irq != upd.sc_irq) 106 return (0); 107 if (ia->ia_drq != -1 && ia->ia_drq != upd.sc_drq) 108 return (0); 109 ia->ia_irq = upd.sc_irq; 110 ia->ia_drq = upd.sc_drq; 111 ia->ia_msize = 0; 112 ia->ia_iosize = UHA_ISA_IOSIZE; 113 } 114 return (rv); 115 } 116 117 /* 118 * Attach all the sub-devices we can find 119 */ 120 void 121 uha_isa_attach(parent, self, aux) 122 struct device *parent, *self; 123 void *aux; 124 { 125 struct isa_attach_args *ia = aux; 126 struct uha_softc *sc = (void *)self; 127 bus_space_tag_t iot = ia->ia_iot; 128 bus_dma_tag_t dmat = ia->ia_dmat; 129 bus_space_handle_t ioh; 130 struct uha_probe_data upd; 131 isa_chipset_tag_t ic = ia->ia_ic; 132 133 printf("\n"); 134 135 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 136 panic("uha_isa_attach: bus_space_map failed!"); 137 138 sc->sc_iot = iot; 139 sc->sc_ioh = ioh; 140 sc->sc_dmat = dmat; 141 if (!u14_find(iot, ioh, &upd)) 142 panic("uha_isa_attach: u14_find failed!"); 143 144 if (upd.sc_drq != -1) { 145 sc->sc_dmaflags = 0; 146 isa_dmacascade(parent, upd.sc_drq); 147 } else { 148 /* 149 * We have a VLB controller, and can do 32-bit DMA. 150 */ 151 sc->sc_dmaflags = ISABUS_DMA_32BIT; 152 } 153 154 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 155 u14_intr, sc); 156 if (sc->sc_ih == NULL) { 157 printf("%s: couldn't establish interrupt\n", 158 sc->sc_dev.dv_xname); 159 return; 160 } 161 162 /* Save function pointers for later use. */ 163 sc->start_mbox = u14_start_mbox; 164 sc->poll = u14_poll; 165 sc->init = u14_init; 166 167 uha_attach(sc, &upd); 168 } 169 170 /* 171 * Start the board, ready for normal operation 172 */ 173 int 174 u14_find(iot, ioh, sc) 175 bus_space_tag_t iot; 176 bus_space_handle_t ioh; 177 struct uha_probe_data *sc; 178 { 179 u_int16_t model, config; 180 int irq, drq; 181 int resetcount = 4000; /* 4 secs? */ 182 183 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 184 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 185 if ((model & 0xfff0) != 0x5640) 186 return (0); 187 188 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 189 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 190 191 switch (model & 0x000f) { 192 case 0x0000: 193 switch (config & U14_DMA_MASK) { 194 case U14_DMA_CH5: 195 drq = 5; 196 break; 197 case U14_DMA_CH6: 198 drq = 6; 199 break; 200 case U14_DMA_CH7: 201 drq = 7; 202 break; 203 default: 204 printf("u14_find: illegal drq setting %x\n", 205 config & U14_DMA_MASK); 206 return (0); 207 } 208 break; 209 case 0x0001: 210 /* This is a 34f, and doesn't need an ISA DMA channel. */ 211 drq = -1; 212 break; 213 default: 214 printf("u14_find: unknown model %x\n", model); 215 return (0); 216 } 217 218 switch (config & U14_IRQ_MASK) { 219 case U14_IRQ10: 220 irq = 10; 221 break; 222 case U14_IRQ11: 223 irq = 11; 224 break; 225 case U14_IRQ14: 226 irq = 14; 227 break; 228 case U14_IRQ15: 229 irq = 15; 230 break; 231 default: 232 printf("u14_find: illegal irq setting %x\n", 233 config & U14_IRQ_MASK); 234 return (0); 235 } 236 237 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 238 239 while (--resetcount) { 240 if (bus_space_read_1(iot, ioh, U14_LINT)) 241 break; 242 delay(1000); /* 1 mSec per loop */ 243 } 244 if (!resetcount) { 245 printf("u14_find: board timed out during reset\n"); 246 return (0); 247 } 248 249 /* if we want to fill in softc, do so now */ 250 if (sc) { 251 sc->sc_irq = irq; 252 sc->sc_drq = drq; 253 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 254 } 255 256 return (1); 257 } 258 259 /* 260 * Function to send a command out through a mailbox 261 */ 262 void 263 u14_start_mbox(sc, mscp) 264 struct uha_softc *sc; 265 struct uha_mscp *mscp; 266 { 267 bus_space_tag_t iot = sc->sc_iot; 268 bus_space_handle_t ioh = sc->sc_ioh; 269 int spincount = 100000; /* 1s should be enough */ 270 271 while (--spincount) { 272 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 273 break; 274 delay(100); 275 } 276 if (!spincount) { 277 printf("%s: uha_start_mbox, board not responding\n", 278 sc->sc_dev.dv_xname); 279 Debugger(); 280 } 281 282 bus_space_write_4(iot, ioh, U14_OGMPTR, 283 mscp->dmamap_self->dm_segs[0].ds_addr); 284 if (mscp->flags & MSCP_ABORT) 285 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 286 else 287 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 288 289 if ((mscp->xs->flags & SCSI_POLL) == 0) 290 timeout(uha_timeout, mscp, (mscp->timeout * hz) / 1000); 291 } 292 293 /* 294 * Function to poll for command completion when in poll mode. 295 * 296 * wait = timeout in msec 297 */ 298 int 299 u14_poll(sc, xs, count) 300 struct uha_softc *sc; 301 struct scsi_xfer *xs; 302 int count; 303 { 304 bus_space_tag_t iot = sc->sc_iot; 305 bus_space_handle_t ioh = sc->sc_ioh; 306 307 while (count) { 308 /* 309 * If we had interrupts enabled, would we 310 * have got an interrupt? 311 */ 312 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 313 u14_intr(sc); 314 if (xs->flags & ITSDONE) 315 return (0); 316 delay(1000); 317 count--; 318 } 319 return (1); 320 } 321 322 /* 323 * Catch an interrupt from the adaptor 324 */ 325 int 326 u14_intr(arg) 327 void *arg; 328 { 329 struct uha_softc *sc = arg; 330 bus_space_tag_t iot = sc->sc_iot; 331 bus_space_handle_t ioh = sc->sc_ioh; 332 struct uha_mscp *mscp; 333 u_char uhastat; 334 u_long mboxval; 335 336 #ifdef UHADEBUG 337 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 338 #endif /*UHADEBUG */ 339 340 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 341 return (0); 342 343 for (;;) { 344 /* 345 * First get all the information and then 346 * acknowledge the interrupt 347 */ 348 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 349 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 350 /* XXX Send an ABORT_ACK instead? */ 351 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 352 353 #ifdef UHADEBUG 354 printf("status = 0x%x ", uhastat); 355 #endif /*UHADEBUG*/ 356 357 /* 358 * Process the completed operation 359 */ 360 mscp = uha_mscp_phys_kv(sc, mboxval); 361 if (!mscp) { 362 printf("%s: BAD MSCP RETURNED!\n", 363 sc->sc_dev.dv_xname); 364 continue; /* whatever it was, it'll timeout */ 365 } 366 367 untimeout(uha_timeout, mscp); 368 uha_done(sc, mscp); 369 370 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 371 return (1); 372 } 373 } 374 375 void 376 u14_init(sc) 377 struct uha_softc *sc; 378 { 379 bus_space_tag_t iot = sc->sc_iot; 380 bus_space_handle_t ioh = sc->sc_ioh; 381 382 /* make sure interrupts are enabled */ 383 #ifdef UHADEBUG 384 printf("u14_init: lmask=%02x, smask=%02x\n", 385 bus_space_read_1(iot, ioh, U14_LMASK), 386 bus_space_read_1(iot, ioh, U14_SMASK)); 387 #endif 388 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 389 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 390 } 391
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