if_ai.c revision 1.36
1/* $NetBSD: if_ai.c,v 1.36 2022/07/12 02:03:57 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 Rafal K. Boni. 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: if_ai.c,v 1.36 2022/07/12 02:03:57 thorpej Exp $"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/mbuf.h> 38#include <sys/errno.h> 39#include <sys/device.h> 40#include <sys/protosw.h> 41#include <sys/socket.h> 42 43#include <net/if.h> 44#include <net/if_dl.h> 45#include <net/if_types.h> 46#include <net/if_media.h> 47#include <net/if_ether.h> 48 49#include <sys/cpu.h> 50#include <sys/bus.h> 51#include <sys/intr.h> 52 53#include <dev/isa/isareg.h> 54#include <dev/isa/isavar.h> 55 56#include <dev/ic/i82586reg.h> 57#include <dev/ic/i82586var.h> 58#include <dev/isa/if_aireg.h> 59 60#ifdef AI_DEBUG 61#define DPRINTF(x) printf x 62#else 63#define DPRINTF(x) 64#endif 65 66struct ai_softc { 67 struct ie_softc sc_ie; 68 69 bus_space_tag_t sc_regt; /* space tag for registers */ 70 bus_space_handle_t sc_regh; /* space handle for registers */ 71 72 uint8_t card_rev; 73 uint8_t card_type; 74 75 void *sc_ih; /* interrupt handle */ 76}; 77 78static const char *ai_names[] = { 79 "StarLAN 10", 80 "EN100", 81 "StarLAN Fiber", 82}; 83 84/* Functions required by the i82586 MI driver */ 85static void ai_reset(struct ie_softc *, int); 86static void ai_atten(struct ie_softc *, int); 87 88static void ai_copyin(struct ie_softc *, void *, int, size_t); 89static void ai_copyout(struct ie_softc *, const void *, int, size_t); 90 91static uint16_t ai_read_16(struct ie_softc *, int); 92static void ai_write_16(struct ie_softc *, int, uint16_t); 93static void ai_write_24(struct ie_softc *, int, int); 94 95/* Local support functions */ 96static int check_ie_present(struct ie_softc*, bus_space_tag_t, 97 bus_space_handle_t, bus_size_t); 98static int ai_find_mem_size(struct ai_softc*, bus_space_tag_t, 99 bus_size_t); 100 101static int ai_match(device_t, cfdata_t, void *); 102static void ai_attach(device_t, device_t, void *); 103 104/* 105 * AT&T StarLan support routines 106 */ 107static void 108ai_reset(struct ie_softc *sc, int why) 109{ 110 struct ai_softc *asc = (struct ai_softc *)sc; 111 112 switch (why) { 113 case CHIP_PROBE: 114 /* Reset to chip to see if it responds */ 115 bus_space_write_1(asc->sc_regt, asc->sc_regh, AI_RESET, 0); 116 DELAY(100); 117 break; 118 119 case CARD_RESET: 120 /* 121 * This takes around 10sec, and we can get 122 * by quite well w/out it... 123 */ 124 break; 125 } 126} 127 128static void 129ai_atten(struct ie_softc *sc, int why) 130{ 131 struct ai_softc *asc = (struct ai_softc *)sc; 132 133 bus_space_write_1(asc->sc_regt, asc->sc_regh, AI_ATTN, 0); 134} 135 136static void 137ai_copyin(struct ie_softc *sc, void *dst, int offset, size_t size) 138{ 139 int dribble; 140 uint8_t *bptr = dst; 141 142 if (offset % 2) { 143 *bptr = bus_space_read_1(sc->bt, sc->bh, offset); 144 offset++; bptr++; size--; 145 } 146 147 dribble = size % 2; 148 bus_space_read_region_2(sc->bt, sc->bh, offset, (uint16_t *)bptr, 149 size >> 1); 150 151 if (dribble) { 152 bptr += size - 1; 153 offset += size - 1; 154 *bptr = bus_space_read_1(sc->bt, sc->bh, offset); 155 } 156} 157 158static void 159ai_copyout(struct ie_softc *sc, const void *src, int offset, size_t size) 160{ 161 int dribble; 162 const uint8_t *bptr = src; 163 164 if (offset % 2) { 165 bus_space_write_1(sc->bt, sc->bh, offset, *bptr); 166 offset++; bptr++; size--; 167 } 168 169 dribble = size % 2; 170 bus_space_write_region_2(sc->bt, sc->bh, offset, 171 (const uint16_t *)bptr, size >> 1); 172 if (dribble) { 173 bptr += size - 1; 174 offset += size - 1; 175 bus_space_write_1(sc->bt, sc->bh, offset, *bptr); 176 } 177} 178 179static uint16_t 180ai_read_16(struct ie_softc *sc, int offset) 181{ 182 183 return bus_space_read_2(sc->bt, sc->bh, offset); 184} 185 186static void 187ai_write_16(struct ie_softc *sc, int offset, uint16_t value) 188{ 189 190 bus_space_write_2(sc->bt, sc->bh, offset, value); 191} 192 193static void 194ai_write_24(struct ie_softc *sc, int offset, int addr) 195{ 196 197 bus_space_write_4(sc->bt, sc->bh, offset, addr + 198 (u_long)sc->sc_maddr - (u_long)sc->sc_iobase); 199} 200 201int 202ai_match(device_t parent, cfdata_t cf, void *aux) 203{ 204 int rv = 0; 205 uint8_t val, type; 206 bus_size_t memsize; 207 bus_space_tag_t iot; 208 bus_space_handle_t ioh; 209 struct isa_attach_args * const ia = aux; 210 struct ai_softc asc; 211 212 if (ia->ia_nio < 1) 213 return 0; 214 if (ia->ia_niomem < 1) 215 return 0; 216 if (ia->ia_nirq < 1) 217 return 0; 218 219 if (ISA_DIRECT_CONFIG(ia)) 220 return 0; 221 222 /* Punt if wildcarded port, IRQ or memory address */ 223 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT || 224 ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM || 225 ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) { 226 DPRINTF(( 227 "ai_match: wildcarded IRQ, IOAddr, or memAddr, skipping\n")); 228 return 0; 229 } 230 231 iot = ia->ia_iot; 232 233 /* 234 * This probe is horribly bad, but I have no info on this card other 235 * than the former driver, and it was just as bad! 236 */ 237 if (bus_space_map(iot, ia->ia_io[0].ir_addr, 238 AI_IOSIZE, 0, &ioh) != 0) { 239 240 DPRINTF(("ai_match: cannot map %d IO ports @ 0x%x\n", 241 AI_IOSIZE, ia->ia_io[0].ir_addr)); 242 return 0; 243 } 244 245 val = bus_space_read_1(iot, ioh, AI_REVISION); 246 247 type = SL_BOARD(val); 248 if (type != SL10_BOARD && type != EN100_BOARD && 249 type != SLFIBER_BOARD) { 250 DPRINTF(("ai_match: unknown board code 0x%02x @ 0x%x\n", 251 type, ia->ia_io[0].ir_addr)); 252 goto out; 253 } 254 255 /* 256 * Fill in just about enough of our local `ai_softc' for 257 * ai_find_mem_size() to do its job. 258 */ 259 memset(&asc, 0, sizeof asc); 260 asc.sc_regt = iot; 261 asc.sc_regh = ioh; 262 263 if ((memsize = ai_find_mem_size(&asc, ia->ia_memt, 264 ia->ia_iomem[0].ir_addr)) == 0) { 265 DPRINTF(("ai_match: cannot size memory of board @ 0x%x\n", 266 ia->ia_io[0].ir_addr)); 267 goto out; 268 } 269 270 if (ia->ia_iomem[0].ir_size != 0 && 271 ia->ia_iomem[0].ir_size != memsize) { 272 DPRINTF(( 273 "ai_match: memsize of board @ 0x%x doesn't match config\n", 274 ia->ia_io[0].ir_addr)); 275 goto out; 276 } 277 278 rv = 1; 279 280 ia->ia_nio = 1; 281 ia->ia_io[0].ir_size = AI_IOSIZE; 282 283 ia->ia_niomem = 1; 284 ia->ia_iomem[0].ir_size = memsize; 285 286 ia->ia_nirq = 1; 287 288 ia->ia_ndrq = 0; 289 290 DPRINTF(("ai_match: found board @ 0x%x\n", ia->ia_io[0].ir_addr)); 291 292out: 293 bus_space_unmap(iot, ioh, AI_IOSIZE); 294 return rv; 295} 296 297void 298ai_attach(device_t parent, device_t self, void *aux) 299{ 300 struct ai_softc *asc = device_private(self); 301 struct ie_softc *sc = &asc->sc_ie; 302 struct isa_attach_args *ia = aux; 303 uint8_t val = 0; 304 bus_space_handle_t ioh, memh; 305 uint8_t ethaddr[ETHER_ADDR_LEN]; 306 char name[80]; 307 308 sc->sc_dev = self; 309 310 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 311 ia->ia_io[0].ir_size, 0, &ioh) != 0) { 312 DPRINTF(("\n%s: can't map i/o space 0x%x-0x%x\n", 313 device_xname(self), 314 ia->ia_io[0].ir_addr, ia->ia_io[0].ir_addr + 315 ia->ia_io[0].ir_size - 1)); 316 return; 317 } 318 319 if (bus_space_map(ia->ia_memt, ia->ia_iomem[0].ir_addr, 320 ia->ia_iomem[0].ir_size, 0, &memh) != 0) { 321 DPRINTF(("\n%s: can't map iomem space 0x%x-0x%x\n", 322 device_xname(self), 323 ia->ia_iomem[0].ir_addr, ia->ia_iomem[0].ir_addr + 324 ia->ia_iomem[0].ir_size - 1)); 325 bus_space_unmap(ia->ia_iot, ioh, ia->ia_io[0].ir_size); 326 return; 327 } 328 329 asc->sc_regt = ia->ia_iot; 330 asc->sc_regh = ioh; 331 332 sc->hwinit = NULL; 333 sc->intrhook = NULL; 334 sc->hwreset = ai_reset; 335 sc->chan_attn = ai_atten; 336 337 sc->ie_bus_barrier = NULL; 338 339 sc->memcopyin = ai_copyin; 340 sc->memcopyout = ai_copyout; 341 sc->ie_bus_read16 = ai_read_16; 342 sc->ie_bus_write16 = ai_write_16; 343 sc->ie_bus_write24 = ai_write_24; 344 345 sc->do_xmitnopchain = 0; 346 347 sc->sc_mediachange = NULL; 348 sc->sc_mediastatus = NULL; 349 350 sc->bt = ia->ia_memt; 351 sc->bh = memh; 352 353 /* Map i/o space. */ 354 sc->sc_msize = ia->ia_iomem[0].ir_size; 355 sc->sc_maddr = (void *)memh; 356 sc->sc_iobase = (char *)sc->sc_maddr + sc->sc_msize - (1 << 24); 357 358 /* Set up pointers to important on-card control structures */ 359 sc->iscp = 0; 360 sc->scb = IE_ISCP_SZ; 361 sc->scp = sc->sc_msize + IE_SCP_ADDR - (1 << 24); 362 363 sc->buf_area = sc->scb + IE_SCB_SZ; 364 sc->buf_area_sz = sc->sc_msize - IE_ISCP_SZ - IE_SCB_SZ - IE_SCP_SZ; 365 366 /* Zero card memory */ 367 bus_space_set_region_1(sc->bt, sc->bh, 0, 0, sc->sc_msize); 368 369 /* Set card to 16-bit bus mode */ 370 bus_space_write_1(sc->bt, sc->bh, IE_SCP_BUS_USE((u_long)sc->scp), 371 IE_SYSBUS_16BIT); 372 373 /* Set up pointers to key structures */ 374 ai_write_24(sc, IE_SCP_ISCP((u_long)sc->scp), (u_long)sc->iscp); 375 ai_write_16(sc, IE_ISCP_SCB((u_long)sc->iscp), (u_long)sc->scb); 376 ai_write_24(sc, IE_ISCP_BASE((u_long)sc->iscp), (u_long)sc->iscp); 377 378 /* Flush setup of pointers, check if chip answers */ 379 if (!i82586_proberam(sc)) { 380 DPRINTF(("\n%s: can't talk to i82586!\n", 381 device_xname(self))); 382 bus_space_unmap(ia->ia_iot, ioh, ia->ia_io[0].ir_size); 383 bus_space_unmap(ia->ia_memt, memh, ia->ia_iomem[0].ir_size); 384 return; 385 } 386 387 val = bus_space_read_1(asc->sc_regt, asc->sc_regh, AI_REVISION); 388 asc->card_rev = SL_REV(val); 389 asc->card_type = SL_BOARD(val) - 1; 390 snprintf(name, sizeof(name), "%s, rev. %d", 391 ai_names[asc->card_type], asc->card_rev); 392 393 i82586_attach(sc, name, ethaddr, NULL, 0, 0); 394 395 asc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 396 IST_EDGE, IPL_NET, i82586_intr, sc); 397 if (asc->sc_ih == NULL) { 398 DPRINTF(("\n%s: can't establish interrupt\n", 399 device_xname(self))); 400 } 401} 402 403/* 404 * Divine the memory size of this board. 405 * Better hope there's nothing important hiding just below the card... 406 */ 407static int 408ai_find_mem_size(struct ai_softc* asc, bus_space_tag_t memt, bus_size_t maddr) 409{ 410 int size; 411 bus_space_handle_t memh; 412 struct ie_softc *sc = &asc->sc_ie; 413 414 for (size = 65536; size >= 16384; size -= 16384) { 415 if (bus_space_map(memt, maddr, size, 0, &memh) == 0) { 416 size = check_ie_present(sc, memt, maddr, size); 417 bus_space_unmap(memt, memh, size); 418 419 if (size != 0) 420 return size; 421 } 422 } 423 424 return 0; 425} 426 427/* 428 * Check to see if there's an 82586 out there. 429 */ 430static int 431check_ie_present(struct ie_softc* sc, bus_space_tag_t memt, 432 bus_space_handle_t memh, bus_size_t size) 433{ 434 435 sc->hwreset = ai_reset; 436 sc->chan_attn = ai_atten; 437 sc->ie_bus_read16 = ai_read_16; 438 sc->ie_bus_write16 = ai_write_16; 439 440 sc->bt = memt; 441 sc->bh = memh; 442 sc->sc_iobase = (char *)memh + size - (1 << 24); 443 444 sc->scp = size + IE_SCP_ADDR - (1 << 24); 445 bus_space_set_region_1(memt, memh, (u_long)sc->scp, 0, IE_SCP_SZ); 446 447 sc->iscp = 0; 448 bus_space_set_region_1(memt, memh, (u_long)sc->iscp, 0, IE_ISCP_SZ); 449 450 sc->scb = IE_ISCP_SZ; 451 bus_space_set_region_1(memt, memh, sc->scb, 0, IE_SCB_SZ); 452 453 /* Set card to 16-bit bus mode */ 454 bus_space_write_1(sc->bt, sc->bh, IE_SCP_BUS_USE((u_long)sc->scp), 455 IE_SYSBUS_16BIT); 456 457 /* Set up pointers to key structures */ 458 ai_write_24(sc, IE_SCP_ISCP((u_long)sc->scp), (u_long)sc->iscp); 459 ai_write_16(sc, IE_ISCP_SCB((u_long)sc->iscp), (u_long)sc->scb); 460 ai_write_24(sc, IE_ISCP_BASE((u_long)sc->iscp), (u_long)sc->iscp); 461 462 /* Flush setup of pointers, check if chip answers */ 463 if (!i82586_proberam(sc)) 464 return 0; 465 466 return size; 467} 468 469CFATTACH_DECL_NEW(ai, sizeof(struct ai_softc), 470 ai_match, ai_attach, NULL, NULL); 471