1 /* $NetBSD: uha_isa.c,v 1.19 2000/03/23 07:01:35 thorpej 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 "opt_ddb.h" 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 #include <sys/kernel.h> 46 #include <sys/proc.h> 47 #include <sys/user.h> 48 49 #include <machine/bus.h> 50 #include <machine/intr.h> 51 52 #include <dev/scsipi/scsi_all.h> 53 #include <dev/scsipi/scsipi_all.h> 54 #include <dev/scsipi/scsiconf.h> 55 56 #include <dev/isa/isavar.h> 57 #include <dev/isa/isadmavar.h> 58 59 #include <dev/ic/uhareg.h> 60 #include <dev/ic/uhavar.h> 61 62 #define UHA_ISA_IOSIZE 16 63 64 int uha_isa_probe __P((struct device *, struct cfdata *, void *)); 65 void uha_isa_attach __P((struct device *, struct device *, void *)); 66 67 struct cfattach uha_isa_ca = { 68 sizeof(struct uha_softc), uha_isa_probe, uha_isa_attach 69 }; 70 71 #ifndef DDB 72 #define Debugger() panic("should call debugger here (uha_isa.c)") 73 #endif /* ! DDB */ 74 75 int u14_find __P((bus_space_tag_t, bus_space_handle_t, 76 struct uha_probe_data *)); 77 void u14_start_mbox __P((struct uha_softc *, struct uha_mscp *)); 78 int u14_poll __P((struct uha_softc *, struct scsipi_xfer *, int)); 79 int u14_intr __P((void *)); 80 void u14_init __P((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(parent, match, aux) 89 struct device *parent; 90 struct cfdata *match; 91 void *aux; 92 { 93 struct isa_attach_args *ia = aux; 94 bus_space_tag_t iot = ia->ia_iot; 95 bus_space_handle_t ioh; 96 struct uha_probe_data upd; 97 int rv; 98 99 /* Disallow wildcarded i/o address. */ 100 if (ia->ia_iobase == ISACF_PORT_DEFAULT) 101 return (0); 102 103 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) 104 return (0); 105 106 rv = u14_find(iot, ioh, &upd); 107 108 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 109 110 if (rv) { 111 if (ia->ia_irq != -1 && ia->ia_irq != upd.sc_irq) 112 return (0); 113 if (ia->ia_drq != -1 && ia->ia_drq != upd.sc_drq) 114 return (0); 115 ia->ia_irq = upd.sc_irq; 116 ia->ia_drq = upd.sc_drq; 117 ia->ia_msize = 0; 118 ia->ia_iosize = UHA_ISA_IOSIZE; 119 } 120 return (rv); 121 } 122 123 /* 124 * Attach all the sub-devices we can find 125 */ 126 void 127 uha_isa_attach(parent, self, aux) 128 struct device *parent, *self; 129 void *aux; 130 { 131 struct isa_attach_args *ia = aux; 132 struct uha_softc *sc = (void *)self; 133 bus_space_tag_t iot = ia->ia_iot; 134 bus_dma_tag_t dmat = ia->ia_dmat; 135 bus_space_handle_t ioh; 136 struct uha_probe_data upd; 137 isa_chipset_tag_t ic = ia->ia_ic; 138 int error; 139 140 printf("\n"); 141 142 if (bus_space_map(iot, ia->ia_iobase, UHA_ISA_IOSIZE, 0, &ioh)) { 143 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 144 return; 145 } 146 147 sc->sc_iot = iot; 148 sc->sc_ioh = ioh; 149 sc->sc_dmat = dmat; 150 if (!u14_find(iot, ioh, &upd)) { 151 printf("%s: u14_find failed\n", sc->sc_dev.dv_xname); 152 return; 153 } 154 155 if (upd.sc_drq != -1) { 156 sc->sc_dmaflags = 0; 157 if ((error = isa_dmacascade(ic, upd.sc_drq)) != 0) { 158 printf("%s: unable to cascade DRQ, error = %d\n", 159 sc->sc_dev.dv_xname, error); 160 return; 161 } 162 } else { 163 /* 164 * We have a VLB controller, and can do 32-bit DMA. 165 */ 166 sc->sc_dmaflags = ISABUS_DMA_32BIT; 167 } 168 169 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 170 u14_intr, sc); 171 if (sc->sc_ih == NULL) { 172 printf("%s: couldn't establish interrupt\n", 173 sc->sc_dev.dv_xname); 174 return; 175 } 176 177 /* Save function pointers for later use. */ 178 sc->start_mbox = u14_start_mbox; 179 sc->poll = u14_poll; 180 sc->init = u14_init; 181 182 uha_attach(sc, &upd); 183 } 184 185 /* 186 * Start the board, ready for normal operation 187 */ 188 int 189 u14_find(iot, ioh, sc) 190 bus_space_tag_t iot; 191 bus_space_handle_t ioh; 192 struct uha_probe_data *sc; 193 { 194 u_int16_t model, config; 195 int irq, drq; 196 int resetcount = 4000; /* 4 secs? */ 197 198 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 199 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 200 if ((model & 0xfff0) != 0x5640) 201 return (0); 202 203 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 204 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 205 206 switch (model & 0x000f) { 207 case 0x0000: 208 switch (config & U14_DMA_MASK) { 209 case U14_DMA_CH5: 210 drq = 5; 211 break; 212 case U14_DMA_CH6: 213 drq = 6; 214 break; 215 case U14_DMA_CH7: 216 drq = 7; 217 break; 218 default: 219 printf("u14_find: illegal drq setting %x\n", 220 config & U14_DMA_MASK); 221 return (0); 222 } 223 break; 224 case 0x0001: 225 /* This is a 34f, and doesn't need an ISA DMA channel. */ 226 drq = -1; 227 break; 228 default: 229 printf("u14_find: unknown model %x\n", model); 230 return (0); 231 } 232 233 switch (config & U14_IRQ_MASK) { 234 case U14_IRQ10: 235 irq = 10; 236 break; 237 case U14_IRQ11: 238 irq = 11; 239 break; 240 case U14_IRQ14: 241 irq = 14; 242 break; 243 case U14_IRQ15: 244 irq = 15; 245 break; 246 default: 247 printf("u14_find: illegal irq setting %x\n", 248 config & U14_IRQ_MASK); 249 return (0); 250 } 251 252 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 253 254 while (--resetcount) { 255 if (bus_space_read_1(iot, ioh, U14_LINT)) 256 break; 257 delay(1000); /* 1 mSec per loop */ 258 } 259 if (!resetcount) { 260 printf("u14_find: board timed out during reset\n"); 261 return (0); 262 } 263 264 /* if we want to fill in softc, do so now */ 265 if (sc) { 266 sc->sc_irq = irq; 267 sc->sc_drq = drq; 268 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 269 } 270 271 return (1); 272 } 273 274 /* 275 * Function to send a command out through a mailbox 276 */ 277 void 278 u14_start_mbox(sc, mscp) 279 struct uha_softc *sc; 280 struct uha_mscp *mscp; 281 { 282 bus_space_tag_t iot = sc->sc_iot; 283 bus_space_handle_t ioh = sc->sc_ioh; 284 int spincount = 100000; /* 1s should be enough */ 285 286 while (--spincount) { 287 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 288 break; 289 delay(100); 290 } 291 if (!spincount) { 292 printf("%s: uha_start_mbox, board not responding\n", 293 sc->sc_dev.dv_xname); 294 Debugger(); 295 } 296 297 bus_space_write_4(iot, ioh, U14_OGMPTR, 298 sc->sc_dmamap_mscp->dm_segs[0].ds_addr + UHA_MSCP_OFF(mscp)); 299 if (mscp->flags & MSCP_ABORT) 300 bus_space_write_1(iot, ioh, U14_LINT, U14_ABORT); 301 else 302 bus_space_write_1(iot, ioh, U14_LINT, U14_OGMFULL); 303 304 if ((mscp->xs->xs_control & XS_CTL_POLL) == 0) 305 callout_reset(&mscp->xs->xs_callout, 306 (mscp->timeout * hz) / 1000, uha_timeout, mscp); 307 } 308 309 /* 310 * Function to poll for command completion when in poll mode. 311 * 312 * wait = timeout in msec 313 */ 314 int 315 u14_poll(sc, xs, count) 316 struct uha_softc *sc; 317 struct scsipi_xfer *xs; 318 int count; 319 { 320 bus_space_tag_t iot = sc->sc_iot; 321 bus_space_handle_t ioh = sc->sc_ioh; 322 323 while (count) { 324 /* 325 * If we had interrupts enabled, would we 326 * have got an interrupt? 327 */ 328 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 329 u14_intr(sc); 330 if (xs->xs_status & XS_STS_DONE) 331 return (0); 332 delay(1000); 333 count--; 334 } 335 return (1); 336 } 337 338 /* 339 * Catch an interrupt from the adaptor 340 */ 341 int 342 u14_intr(arg) 343 void *arg; 344 { 345 struct uha_softc *sc = arg; 346 bus_space_tag_t iot = sc->sc_iot; 347 bus_space_handle_t ioh = sc->sc_ioh; 348 struct uha_mscp *mscp; 349 u_char uhastat; 350 u_long mboxval; 351 352 #ifdef UHADEBUG 353 printf("%s: uhaintr ", sc->sc_dev.dv_xname); 354 #endif /*UHADEBUG */ 355 356 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 357 return (0); 358 359 for (;;) { 360 /* 361 * First get all the information and then 362 * acknowledge the interrupt 363 */ 364 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 365 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 366 /* XXX Send an ABORT_ACK instead? */ 367 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 368 369 #ifdef UHADEBUG 370 printf("status = 0x%x ", uhastat); 371 #endif /*UHADEBUG*/ 372 373 /* 374 * Process the completed operation 375 */ 376 mscp = uha_mscp_phys_kv(sc, mboxval); 377 if (!mscp) { 378 printf("%s: BAD MSCP RETURNED!\n", 379 sc->sc_dev.dv_xname); 380 continue; /* whatever it was, it'll timeout */ 381 } 382 383 callout_stop(&mscp->xs->xs_callout); 384 uha_done(sc, mscp); 385 386 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 387 return (1); 388 } 389 } 390 391 void 392 u14_init(sc) 393 struct uha_softc *sc; 394 { 395 bus_space_tag_t iot = sc->sc_iot; 396 bus_space_handle_t ioh = sc->sc_ioh; 397 398 /* make sure interrupts are enabled */ 399 #ifdef UHADEBUG 400 printf("u14_init: lmask=%02x, smask=%02x\n", 401 bus_space_read_1(iot, ioh, U14_LMASK), 402 bus_space_read_1(iot, ioh, U14_SMASK)); 403 #endif 404 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 405 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 406 } 407