if_ie_obio.c revision 1.15
1/* $NetBSD: if_ie_obio.c,v 1.15 2000/06/15 12:12:05 pk Exp $ */ 2 3/*- 4 * Copyright (c) 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 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/*- 40 * Copyright (c) 1995 Charles D. Cranor 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Charles D. Cranor. 54 * 4. The name of the author may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 61 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 62 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 66 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 70 71/* 72 * Sparc OBIO front-end for the Intel 82586 Ethernet driver 73 * 74 * Converted to SUN ie driver by Charles D. Cranor, 75 * October 1994, January 1995. 76 */ 77 78/* 79 * The i82586 is a very painful chip, found in sun3's, sun-4/100's 80 * sun-4/200's, and VME based suns. The byte order is all wrong for a 81 * SUN, making life difficult. Programming this chip is mostly the same, 82 * but certain details differ from system to system. This driver is 83 * written so that different "ie" interfaces can be controled by the same 84 * driver. 85 */ 86 87#include <sys/param.h> 88#include <sys/systm.h> 89#include <sys/errno.h> 90#include <sys/device.h> 91#include <sys/malloc.h> 92#include <sys/protosw.h> 93#include <sys/socket.h> 94 95#include <net/if.h> 96#include <net/if_types.h> 97#include <net/if_dl.h> 98#include <net/if_media.h> 99#include <net/if_ether.h> 100 101#include <vm/vm.h> 102 103#include <machine/autoconf.h> 104#include <machine/cpu.h> 105#include <machine/pmap.h> 106#include <machine/bus.h> 107 108#include <dev/ic/i82586reg.h> 109#include <dev/ic/i82586var.h> 110 111/* 112 * the on-board interface 113 */ 114struct ieob { 115 u_char obctrl; 116}; 117#define IEOB_NORSET 0x80 /* don't reset the board */ 118#define IEOB_ONAIR 0x40 /* put us on the air */ 119#define IEOB_ATTEN 0x20 /* attention! */ 120#define IEOB_IENAB 0x10 /* interrupt enable */ 121#define IEOB_XXXXX 0x08 /* free bit */ 122#define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ 123#define IEOB_BUSERR 0x02 /* bus error */ 124#define IEOB_INT 0x01 /* interrupt */ 125 126#define IEOB_ADBASE 0xff000000 /* KVA base addr of 24 bit address space */ 127 128 129static void ie_obreset __P((struct ie_softc *, int)); 130static void ie_obattend __P((struct ie_softc *)); 131static void ie_obrun __P((struct ie_softc *)); 132 133int ie_obio_match __P((struct device *, struct cfdata *, void *)); 134void ie_obio_attach __P((struct device *, struct device *, void *)); 135 136struct cfattach ie_obio_ca = { 137 sizeof(struct ie_softc), ie_obio_match, ie_obio_attach 138}; 139 140/* Supported media */ 141static int media[] = { 142 IFM_ETHER | IFM_10_2, 143}; 144#define NMEDIA (sizeof(media) / sizeof(media[0])) 145 146 147/* 148 * OBIO ie support routines 149 */ 150void 151ie_obreset(sc, what) 152 struct ie_softc *sc; 153{ 154 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 155 ieo->obctrl = 0; 156 delay(100); /* XXX could be shorter? */ 157 ieo->obctrl = IEOB_NORSET; 158} 159void 160ie_obattend(sc) 161 struct ie_softc *sc; 162{ 163 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 164 165 ieo->obctrl |= IEOB_ATTEN; /* flag! */ 166 ieo->obctrl &= ~IEOB_ATTEN; /* down. */ 167} 168 169void 170ie_obrun(sc) 171 struct ie_softc *sc; 172{ 173 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 174 175 ieo->obctrl |= (IEOB_ONAIR|IEOB_IENAB|IEOB_NORSET); 176} 177 178void ie_obio_memcopyin __P((struct ie_softc *, void *, int, size_t)); 179void ie_obio_memcopyout __P((struct ie_softc *, const void *, int, size_t)); 180 181/* 182 * Copy board memory to kernel. 183 */ 184void 185ie_obio_memcopyin(sc, p, offset, size) 186 struct ie_softc *sc; 187 void *p; 188 int offset; 189 size_t size; 190{ 191 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 192 wcopy(addr, p, size); 193} 194 195/* 196 * Copy from kernel space to naord memory. 197 */ 198void 199ie_obio_memcopyout(sc, p, offset, size) 200 struct ie_softc *sc; 201 const void *p; 202 int offset; 203 size_t size; 204{ 205 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 206 wcopy(p, addr, size); 207} 208 209/* read a 16-bit value at BH offset */ 210u_int16_t ie_obio_read16 __P((struct ie_softc *, int offset)); 211/* write a 16-bit value at BH offset */ 212void ie_obio_write16 __P((struct ie_softc *, int offset, u_int16_t value)); 213void ie_obio_write24 __P((struct ie_softc *, int offset, int addr)); 214 215u_int16_t 216ie_obio_read16(sc, offset) 217 struct ie_softc *sc; 218 int offset; 219{ 220 u_int16_t v = bus_space_read_2(sc->bt, sc->bh, offset); 221 return (((v&0xff)<<8) | ((v>>8)&0xff)); 222} 223 224void 225ie_obio_write16(sc, offset, v) 226 struct ie_softc *sc; 227 int offset; 228 u_int16_t v; 229{ 230 v = (((v&0xff)<<8) | ((v>>8)&0xff)); 231 bus_space_write_2(sc->bt, sc->bh, offset, v); 232} 233 234void 235ie_obio_write24(sc, offset, addr) 236 struct ie_softc *sc; 237 int offset; 238 int addr; 239{ 240 u_char *f = (u_char *)&addr; 241 u_int16_t v0, v1; 242 u_char *t; 243 244 t = (u_char *)&v0; 245 t[0] = f[3]; t[1] = f[2]; 246 bus_space_write_2(sc->bt, sc->bh, offset, v0); 247 248 t = (u_char *)&v1; 249 t[0] = f[1]; t[1] = 0; 250 bus_space_write_2(sc->bt, sc->bh, offset+2, v1); 251} 252 253int 254ie_obio_match(parent, cf, aux) 255 struct device *parent; 256 struct cfdata *cf; 257 void *aux; 258{ 259 union obio_attach_args *uoba = aux; 260 struct obio4_attach_args *oba; 261 262 if (uoba->uoba_isobio4 == 0) 263 return (0); 264 265 oba = &uoba->uoba_oba4; 266 return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr, 267 1, /* probe size */ 268 0, /* offset */ 269 0, /* flags */ 270 NULL, NULL)); 271} 272 273void 274ie_obio_attach(parent, self, aux) 275 struct device *parent; 276 struct device *self; 277 void *aux; 278{ 279 union obio_attach_args *uoba = aux; 280 struct obio4_attach_args *oba = &uoba->uoba_oba4; 281 struct ie_softc *sc = (void *) self; 282 bus_dma_tag_t dmatag = oba->oba_dmatag; 283 bus_space_handle_t bh; 284 bus_dma_segment_t seg; 285 int rseg; 286 int error; 287 paddr_t pa; 288 struct intrhand *ih; 289 bus_size_t msize; 290 u_long iebase; 291 u_int8_t myaddr[ETHER_ADDR_LEN]; 292extern void myetheraddr(u_char *); /* should be elsewhere */ 293 294 sc->bt = oba->oba_bustag; 295 296 sc->hwreset = ie_obreset; 297 sc->chan_attn = ie_obattend; 298 sc->hwinit = ie_obrun; 299 sc->memcopyout = ie_obio_memcopyout; 300 sc->memcopyin = ie_obio_memcopyin; 301 sc->ie_bus_read16 = ie_obio_read16; 302 sc->ie_bus_write16 = ie_obio_write16; 303 sc->ie_bus_write24 = ie_obio_write24; 304 sc->sc_msize = msize = 65536; /* XXX */ 305 306 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 307 0, 308 sizeof(struct ieob), 309 BUS_SPACE_MAP_LINEAR, 310 0, &bh) != 0) { 311 printf("%s: cannot map registers\n", self->dv_xname); 312 return; 313 } 314 sc->sc_reg = (void *)bh; 315 316 /* 317 * Allocate control & buffer memory. 318 */ 319 if ((error = bus_dmamap_create(dmatag, msize, 1, msize, 0, 320 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 321 &sc->sc_dmamap)) != 0) { 322 printf("%s: DMA map create error %d\n", 323 sc->sc_dev.dv_xname, error); 324 return; 325 } 326 if ((error = bus_dmamem_alloc(dmatag, msize, 64*1024, 0, 327 &seg, 1, &rseg, 328 BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 329 printf("%s: DMA memory allocation error %d\n", 330 self->dv_xname, error); 331 return; 332 } 333 334 /* Map DMA buffer in CPU addressable space */ 335 if ((error = bus_dmamem_map(dmatag, &seg, rseg, msize, 336 (caddr_t *)&sc->sc_maddr, 337 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 338 printf("%s: DMA buffer map error %d\n", 339 sc->sc_dev.dv_xname, error); 340 bus_dmamem_free(dmatag, &seg, rseg); 341 return; 342 } 343 344 /* Load the segment */ 345 if ((error = bus_dmamap_load_raw(dmatag, sc->sc_dmamap, 346 &seg, rseg, msize, BUS_DMA_NOWAIT)) != 0) { 347 printf("%s: DMA buffer map load error %d\n", 348 sc->sc_dev.dv_xname, error); 349 bus_dmamem_unmap(dmatag, sc->sc_maddr, msize); 350 bus_dmamem_free(dmatag, &seg, rseg); 351 return; 352 } 353 354 wzero(sc->sc_maddr, msize); 355 sc->bh = (bus_space_handle_t)(sc->sc_maddr); 356 357 /* 358 * The i82586's 24-bit address space maps to the last 16MB of 359 * KVA space (). In addition, the SCP must appear 360 * at IE_SCP_ADDR within the 24-bit address space, 361 * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of 362 * kernel space. We double-map this last page to the first 363 * page (starting at `maddr') of the memory we allocate to the chip. 364 * (a side-effect of this double-map is that the ISCP and SCB 365 * structures also get aliased there, but we ignore this). The 366 * first page at `maddr' is only used for ISCP, SCB and the aliased 367 * SCP; the actual buffers start at maddr+NBPG. 368 * 369 * In a picture: 370 371 |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| 372 | | | | | | | 373 | |<----- NBPG --->| | |<----- NBPG -+-->| 374 | |<------------- msize ------------->| | ^ | 375 | | | | 376 | \@maddr (last page dbl mapped) 377 | | 378 \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ 379 380 * 381 */ 382 383 /* Double map the SCP */ 384 if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == FALSE) 385 panic("ie pmap_extract"); 386 387 pmap_enter(pmap_kernel(), trunc_page(IEOB_ADBASE+IE_SCP_ADDR), 388 pa | PMAP_NC /*| PMAP_IOC*/, 389 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 390 391 /* Map iscp at location 0 (relative to `maddr') */ 392 sc->iscp = 0; 393 394 /* scb follows iscp */ 395 sc->scb = IE_ISCP_SZ; 396 397 /* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */ 398 sc->scp = IE_SCP_ADDR & PGOFSET; 399 400 /* Calculate the 24-bit base of i82586 operations */ 401 iebase = (u_long)sc->sc_dmamap->dm_segs[0].ds_addr - 402 (u_long)IEOB_ADBASE; 403 ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb); 404 ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase); 405 ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp); 406 407 /* 408 * Rest of first page is unused (wasted!); the other pages 409 * are used for buffers. 410 */ 411 sc->buf_area = NBPG; 412 sc->buf_area_sz = msize - NBPG; 413 414 if (i82586_proberam(sc) == 0) { 415 printf(": memory probe failed\n"); 416 return; 417 } 418 419 myetheraddr(myaddr); 420 i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); 421 422 /* Establish interrupt channel */ 423 ih = bus_intr_establish(oba->oba_bustag, 424 oba->oba_pri, 0, 425 i82586_intr, sc); 426} 427