1 /* $NetBSD: uha_isa.c,v 1.35 2009/03/14 15:36:18 dsl 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: uha_isa.c,v 1.35 2009/03/14 15:36:18 dsl Exp $"); 34 35 #include "opt_ddb.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/kernel.h> 41 #include <sys/proc.h> 42 #include <sys/user.h> 43 44 #include <sys/bus.h> 45 #include <sys/intr.h> 46 47 #include <dev/scsipi/scsi_all.h> 48 #include <dev/scsipi/scsipi_all.h> 49 #include <dev/scsipi/scsiconf.h> 50 51 #include <dev/isa/isavar.h> 52 #include <dev/isa/isadmavar.h> 53 54 #include <dev/ic/uhareg.h> 55 #include <dev/ic/uhavar.h> 56 57 #define UHA_ISA_IOSIZE 16 58 59 int uha_isa_probe(struct device *, struct cfdata *, void *); 60 void uha_isa_attach(struct device *, struct device *, void *); 61 62 CFATTACH_DECL(uha_isa, sizeof(struct uha_softc), 63 uha_isa_probe, uha_isa_attach, NULL, NULL); 64 65 #ifndef DDB 66 #define Debugger() panic("should call debugger here (uha_isa.c)") 67 #endif /* ! DDB */ 68 69 int u14_find(bus_space_tag_t, bus_space_handle_t, struct uha_probe_data *); 70 void u14_start_mbox(struct uha_softc *, struct uha_mscp *); 71 int u14_poll(struct uha_softc *, struct scsipi_xfer *, int); 72 int u14_intr(void *); 73 void u14_init(struct uha_softc *); 74 75 /* 76 * Check the slots looking for a board we recognise 77 * If we find one, note it's address (slot) and call 78 * the actual probe routine to check it out. 79 */ 80 int 81 uha_isa_probe(struct device *parent, struct cfdata *match, 82 void *aux) 83 { 84 struct isa_attach_args *ia = aux; 85 bus_space_tag_t iot = ia->ia_iot; 86 bus_space_handle_t ioh; 87 struct uha_probe_data upd; 88 int rv; 89 90 if (ia->ia_nio < 1) 91 return (0); 92 if (ia->ia_nirq < 1) 93 return (0); 94 if (ia->ia_ndrq < 1) 95 return (0); 96 97 if (ISA_DIRECT_CONFIG(ia)) 98 return (0); 99 100 /* Disallow wildcarded i/o address. */ 101 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 102 return (0); 103 104 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) 105 return (0); 106 107 rv = u14_find(iot, ioh, &upd); 108 109 bus_space_unmap(iot, ioh, UHA_ISA_IOSIZE); 110 111 if (rv) { 112 if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && 113 ia->ia_irq[0].ir_irq != upd.sc_irq) 114 return (0); 115 if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ && 116 ia->ia_drq[0].ir_drq != upd.sc_drq) 117 return (0); 118 119 ia->ia_nio = 1; 120 ia->ia_io[0].ir_size = UHA_ISA_IOSIZE; 121 122 ia->ia_nirq = 1; 123 ia->ia_irq[0].ir_irq = upd.sc_irq; 124 125 ia->ia_ndrq = 1; 126 ia->ia_drq[0].ir_drq = upd.sc_drq; 127 128 ia->ia_niomem = 0; 129 } 130 return (rv); 131 } 132 133 /* 134 * Attach all the sub-devices we can find 135 */ 136 void 137 uha_isa_attach(struct device *parent, struct device *self, void *aux) 138 { 139 struct isa_attach_args *ia = aux; 140 struct uha_softc *sc = (void *)self; 141 bus_space_tag_t iot = ia->ia_iot; 142 bus_dma_tag_t dmat = ia->ia_dmat; 143 bus_space_handle_t ioh; 144 struct uha_probe_data upd; 145 isa_chipset_tag_t ic = ia->ia_ic; 146 int error; 147 148 printf("\n"); 149 150 if (bus_space_map(iot, ia->ia_io[0].ir_addr, UHA_ISA_IOSIZE, 0, &ioh)) { 151 aprint_error_dev(&sc->sc_dev, "can't map i/o space\n"); 152 return; 153 } 154 155 sc->sc_iot = iot; 156 sc->sc_ioh = ioh; 157 sc->sc_dmat = dmat; 158 if (!u14_find(iot, ioh, &upd)) { 159 aprint_error_dev(&sc->sc_dev, "u14_find failed\n"); 160 return; 161 } 162 163 if (upd.sc_drq != -1) { 164 sc->sc_dmaflags = 0; 165 if ((error = isa_dmacascade(ic, upd.sc_drq)) != 0) { 166 aprint_error_dev(&sc->sc_dev, "unable to cascade DRQ, error = %d\n", error); 167 return; 168 } 169 } else { 170 /* 171 * We have a VLB controller, and can do 32-bit DMA. 172 */ 173 sc->sc_dmaflags = ISABUS_DMA_32BIT; 174 } 175 176 sc->sc_ih = isa_intr_establish(ic, upd.sc_irq, IST_EDGE, IPL_BIO, 177 u14_intr, sc); 178 if (sc->sc_ih == NULL) { 179 aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt\n"); 180 return; 181 } 182 183 /* Save function pointers for later use. */ 184 sc->start_mbox = u14_start_mbox; 185 sc->poll = u14_poll; 186 sc->init = u14_init; 187 188 uha_attach(sc, &upd); 189 } 190 191 /* 192 * Start the board, ready for normal operation 193 */ 194 int 195 u14_find(bus_space_tag_t iot, bus_space_handle_t ioh, struct uha_probe_data *sc) 196 { 197 u_int16_t model, config; 198 int irq, drq; 199 int resetcount = 4000; /* 4 secs? */ 200 201 model = (bus_space_read_1(iot, ioh, U14_ID + 0) << 8) | 202 (bus_space_read_1(iot, ioh, U14_ID + 1) << 0); 203 if ((model & 0xfff0) != 0x5640) 204 return (0); 205 206 config = (bus_space_read_1(iot, ioh, U14_CONFIG + 0) << 8) | 207 (bus_space_read_1(iot, ioh, U14_CONFIG + 1) << 0); 208 209 switch (model & 0x000f) { 210 case 0x0000: 211 switch (config & U14_DMA_MASK) { 212 case U14_DMA_CH5: 213 drq = 5; 214 break; 215 case U14_DMA_CH6: 216 drq = 6; 217 break; 218 case U14_DMA_CH7: 219 drq = 7; 220 break; 221 default: 222 printf("u14_find: illegal drq setting %x\n", 223 config & U14_DMA_MASK); 224 return (0); 225 } 226 break; 227 case 0x0001: 228 /* This is a 34f, and doesn't need an ISA DMA channel. */ 229 drq = -1; 230 break; 231 default: 232 printf("u14_find: unknown model %x\n", model); 233 return (0); 234 } 235 236 switch (config & U14_IRQ_MASK) { 237 case U14_IRQ10: 238 irq = 10; 239 break; 240 case U14_IRQ11: 241 irq = 11; 242 break; 243 case U14_IRQ14: 244 irq = 14; 245 break; 246 case U14_IRQ15: 247 irq = 15; 248 break; 249 default: 250 printf("u14_find: illegal irq setting %x\n", 251 config & U14_IRQ_MASK); 252 return (0); 253 } 254 255 bus_space_write_1(iot, ioh, U14_LINT, UHA_ASRST); 256 257 while (--resetcount) { 258 if (bus_space_read_1(iot, ioh, U14_LINT)) 259 break; 260 delay(1000); /* 1 mSec per loop */ 261 } 262 if (!resetcount) { 263 printf("u14_find: board timed out during reset\n"); 264 return (0); 265 } 266 267 /* if we want to fill in softc, do so now */ 268 if (sc) { 269 sc->sc_irq = irq; 270 sc->sc_drq = drq; 271 sc->sc_scsi_dev = config & U14_HOSTID_MASK; 272 } 273 274 return (1); 275 } 276 277 /* 278 * Function to send a command out through a mailbox 279 */ 280 void 281 u14_start_mbox(struct uha_softc *sc, struct uha_mscp *mscp) 282 { 283 bus_space_tag_t iot = sc->sc_iot; 284 bus_space_handle_t ioh = sc->sc_ioh; 285 int spincount = 100000; /* 1s should be enough */ 286 287 while (--spincount) { 288 if ((bus_space_read_1(iot, ioh, U14_LINT) & U14_LDIP) == 0) 289 break; 290 delay(100); 291 } 292 if (!spincount) { 293 aprint_error_dev(&sc->sc_dev, "uha_start_mbox, board not responding\n"); 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 mstohz(mscp->timeout), 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(struct uha_softc *sc, struct scsipi_xfer *xs, int count) 316 { 317 bus_space_tag_t iot = sc->sc_iot; 318 bus_space_handle_t ioh = sc->sc_ioh; 319 320 while (count) { 321 /* 322 * If we had interrupts enabled, would we 323 * have got an interrupt? 324 */ 325 if (bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) 326 u14_intr(sc); 327 if (xs->xs_status & XS_STS_DONE) 328 return (0); 329 delay(1000); 330 count--; 331 } 332 return (1); 333 } 334 335 /* 336 * Catch an interrupt from the adaptor 337 */ 338 int 339 u14_intr(void *arg) 340 { 341 struct uha_softc *sc = arg; 342 bus_space_tag_t iot = sc->sc_iot; 343 bus_space_handle_t ioh = sc->sc_ioh; 344 struct uha_mscp *mscp; 345 u_char uhastat; 346 u_long mboxval; 347 348 #ifdef UHADEBUG 349 printf("%s: uhaintr ", device_xname(&sc->sc_dev)); 350 #endif /*UHADEBUG */ 351 352 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 353 return (0); 354 355 for (;;) { 356 /* 357 * First get all the information and then 358 * acknowledge the interrupt 359 */ 360 uhastat = bus_space_read_1(iot, ioh, U14_SINT); 361 mboxval = bus_space_read_4(iot, ioh, U14_ICMPTR); 362 /* XXX Send an ABORT_ACK instead? */ 363 bus_space_write_1(iot, ioh, U14_SINT, U14_ICM_ACK); 364 365 #ifdef UHADEBUG 366 printf("status = 0x%x ", uhastat); 367 #endif /*UHADEBUG*/ 368 369 /* 370 * Process the completed operation 371 */ 372 mscp = uha_mscp_phys_kv(sc, mboxval); 373 if (!mscp) { 374 printf("%s: BAD MSCP RETURNED!\n", 375 device_xname(&sc->sc_dev)); 376 continue; /* whatever it was, it'll timeout */ 377 } 378 379 callout_stop(&mscp->xs->xs_callout); 380 uha_done(sc, mscp); 381 382 if ((bus_space_read_1(iot, ioh, U14_SINT) & U14_SDIP) == 0) 383 return (1); 384 } 385 } 386 387 void 388 u14_init(struct uha_softc *sc) 389 { 390 bus_space_tag_t iot = sc->sc_iot; 391 bus_space_handle_t ioh = sc->sc_ioh; 392 393 /* make sure interrupts are enabled */ 394 #ifdef UHADEBUG 395 printf("u14_init: lmask=%02x, smask=%02x\n", 396 bus_space_read_1(iot, ioh, U14_LMASK), 397 bus_space_read_1(iot, ioh, U14_SMASK)); 398 #endif 399 bus_space_write_1(iot, ioh, U14_LMASK, 0xd1); /* XXX */ 400 bus_space_write_1(iot, ioh, U14_SMASK, 0x91); /* XXX */ 401 } 402