if_ie_obio.c revision 1.18
1 /* $NetBSD: if_ie_obio.c,v 1.18 2001/01/22 22:28:44 bjh21 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 <uvm/uvm_extern.h> 102 103 #include <machine/bus.h> 104 #include <machine/intr.h> 105 #include <machine/autoconf.h> 106 107 #include <dev/ic/i82586reg.h> 108 #include <dev/ic/i82586var.h> 109 110 /* 111 * the on-board interface 112 */ 113 struct ieob { 114 u_char obctrl; 115 }; 116 #define IEOB_NORSET 0x80 /* don't reset the board */ 117 #define IEOB_ONAIR 0x40 /* put us on the air */ 118 #define IEOB_ATTEN 0x20 /* attention! */ 119 #define IEOB_IENAB 0x10 /* interrupt enable */ 120 #define IEOB_XXXXX 0x08 /* free bit */ 121 #define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ 122 #define IEOB_BUSERR 0x02 /* bus error */ 123 #define IEOB_INT 0x01 /* interrupt */ 124 125 #define IEOB_ADBASE 0xff000000 /* KVA base addr of 24 bit address space */ 126 127 128 static void ie_obreset __P((struct ie_softc *, int)); 129 static void ie_obattend __P((struct ie_softc *)); 130 static void ie_obrun __P((struct ie_softc *)); 131 132 int ie_obio_match __P((struct device *, struct cfdata *, void *)); 133 void ie_obio_attach __P((struct device *, struct device *, void *)); 134 135 struct cfattach ie_obio_ca = { 136 sizeof(struct ie_softc), ie_obio_match, ie_obio_attach 137 }; 138 139 /* Supported media */ 140 static int media[] = { 141 IFM_ETHER | IFM_10_2, 142 }; 143 #define NMEDIA (sizeof(media) / sizeof(media[0])) 144 145 146 /* 147 * OBIO ie support routines 148 */ 149 void 150 ie_obreset(sc, what) 151 struct ie_softc *sc; 152 { 153 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 154 ieo->obctrl = 0; 155 delay(100); /* XXX could be shorter? */ 156 ieo->obctrl = IEOB_NORSET; 157 } 158 void 159 ie_obattend(sc) 160 struct ie_softc *sc; 161 { 162 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 163 164 ieo->obctrl |= IEOB_ATTEN; /* flag! */ 165 ieo->obctrl &= ~IEOB_ATTEN; /* down. */ 166 } 167 168 void 169 ie_obrun(sc) 170 struct ie_softc *sc; 171 { 172 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 173 174 ieo->obctrl |= (IEOB_ONAIR|IEOB_IENAB|IEOB_NORSET); 175 } 176 177 void ie_obio_memcopyin __P((struct ie_softc *, void *, int, size_t)); 178 void ie_obio_memcopyout __P((struct ie_softc *, const void *, int, size_t)); 179 180 /* 181 * Copy board memory to kernel. 182 */ 183 void 184 ie_obio_memcopyin(sc, p, offset, size) 185 struct ie_softc *sc; 186 void *p; 187 int offset; 188 size_t size; 189 { 190 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 191 wcopy(addr, p, size); 192 } 193 194 /* 195 * Copy from kernel space to naord memory. 196 */ 197 void 198 ie_obio_memcopyout(sc, p, offset, size) 199 struct ie_softc *sc; 200 const void *p; 201 int offset; 202 size_t size; 203 { 204 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 205 wcopy(p, addr, size); 206 } 207 208 /* read a 16-bit value at BH offset */ 209 u_int16_t ie_obio_read16 __P((struct ie_softc *, int offset)); 210 /* write a 16-bit value at BH offset */ 211 void ie_obio_write16 __P((struct ie_softc *, int offset, u_int16_t value)); 212 void ie_obio_write24 __P((struct ie_softc *, int offset, int addr)); 213 214 u_int16_t 215 ie_obio_read16(sc, offset) 216 struct ie_softc *sc; 217 int offset; 218 { 219 u_int16_t v = bus_space_read_2(sc->bt, sc->bh, offset); 220 return (((v&0xff)<<8) | ((v>>8)&0xff)); 221 } 222 223 void 224 ie_obio_write16(sc, offset, v) 225 struct ie_softc *sc; 226 int offset; 227 u_int16_t v; 228 { 229 v = (((v&0xff)<<8) | ((v>>8)&0xff)); 230 bus_space_write_2(sc->bt, sc->bh, offset, v); 231 } 232 233 void 234 ie_obio_write24(sc, offset, addr) 235 struct ie_softc *sc; 236 int offset; 237 int addr; 238 { 239 u_char *f = (u_char *)&addr; 240 u_int16_t v0, v1; 241 u_char *t; 242 243 t = (u_char *)&v0; 244 t[0] = f[3]; t[1] = f[2]; 245 bus_space_write_2(sc->bt, sc->bh, offset, v0); 246 247 t = (u_char *)&v1; 248 t[0] = f[1]; t[1] = 0; 249 bus_space_write_2(sc->bt, sc->bh, offset+2, v1); 250 } 251 252 int 253 ie_obio_match(parent, cf, aux) 254 struct device *parent; 255 struct cfdata *cf; 256 void *aux; 257 { 258 union obio_attach_args *uoba = aux; 259 struct obio4_attach_args *oba; 260 261 if (uoba->uoba_isobio4 == 0) 262 return (0); 263 264 oba = &uoba->uoba_oba4; 265 return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr, 266 1, /* probe size */ 267 0, /* offset */ 268 0, /* flags */ 269 NULL, NULL)); 270 } 271 272 void 273 ie_obio_attach(parent, self, aux) 274 struct device *parent; 275 struct device *self; 276 void *aux; 277 { 278 union obio_attach_args *uoba = aux; 279 struct obio4_attach_args *oba = &uoba->uoba_oba4; 280 struct ie_softc *sc = (void *) self; 281 bus_dma_tag_t dmatag = oba->oba_dmatag; 282 bus_space_handle_t bh; 283 bus_dma_segment_t seg; 284 int rseg; 285 int error; 286 paddr_t pa; 287 struct intrhand *ih; 288 bus_size_t msize; 289 u_long iebase; 290 u_int8_t myaddr[ETHER_ADDR_LEN]; 291 extern void myetheraddr(u_char *); /* should be elsewhere */ 292 293 sc->bt = oba->oba_bustag; 294 295 sc->hwreset = ie_obreset; 296 sc->chan_attn = ie_obattend; 297 sc->hwinit = ie_obrun; 298 sc->memcopyout = ie_obio_memcopyout; 299 sc->memcopyin = ie_obio_memcopyin; 300 301 sc->ie_bus_barrier = NULL; 302 sc->ie_bus_read16 = ie_obio_read16; 303 sc->ie_bus_write16 = ie_obio_write16; 304 sc->ie_bus_write24 = ie_obio_write24; 305 sc->sc_msize = msize = 65536; /* XXX */ 306 307 if (obio_bus_map(oba->oba_bustag, oba->oba_paddr, 308 0, 309 sizeof(struct ieob), 310 BUS_SPACE_MAP_LINEAR, 311 0, &bh) != 0) { 312 printf("%s: cannot map registers\n", self->dv_xname); 313 return; 314 } 315 sc->sc_reg = (void *)bh; 316 317 /* 318 * Allocate control & buffer memory. 319 */ 320 if ((error = bus_dmamap_create(dmatag, msize, 1, msize, 0, 321 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 322 &sc->sc_dmamap)) != 0) { 323 printf("%s: DMA map create error %d\n", 324 sc->sc_dev.dv_xname, error); 325 return; 326 } 327 if ((error = bus_dmamem_alloc(dmatag, msize, 64*1024, 0, 328 &seg, 1, &rseg, 329 BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 330 printf("%s: DMA memory allocation error %d\n", 331 self->dv_xname, error); 332 return; 333 } 334 335 /* Map DMA buffer in CPU addressable space */ 336 if ((error = bus_dmamem_map(dmatag, &seg, rseg, msize, 337 (caddr_t *)&sc->sc_maddr, 338 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 339 printf("%s: DMA buffer map error %d\n", 340 sc->sc_dev.dv_xname, error); 341 bus_dmamem_free(dmatag, &seg, rseg); 342 return; 343 } 344 345 /* Load the segment */ 346 if ((error = bus_dmamap_load_raw(dmatag, sc->sc_dmamap, 347 &seg, rseg, msize, BUS_DMA_NOWAIT)) != 0) { 348 printf("%s: DMA buffer map load error %d\n", 349 sc->sc_dev.dv_xname, error); 350 bus_dmamem_unmap(dmatag, sc->sc_maddr, msize); 351 bus_dmamem_free(dmatag, &seg, rseg); 352 return; 353 } 354 355 wzero(sc->sc_maddr, msize); 356 sc->bh = (bus_space_handle_t)(sc->sc_maddr); 357 358 /* 359 * The i82586's 24-bit address space maps to the last 16MB of 360 * KVA space (). In addition, the SCP must appear 361 * at IE_SCP_ADDR within the 24-bit address space, 362 * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of 363 * kernel space. We double-map this last page to the first 364 * page (starting at `maddr') of the memory we allocate to the chip. 365 * (a side-effect of this double-map is that the ISCP and SCB 366 * structures also get aliased there, but we ignore this). The 367 * first page at `maddr' is only used for ISCP, SCB and the aliased 368 * SCP; the actual buffers start at maddr+NBPG. 369 * 370 * In a picture: 371 372 |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| 373 | | | | | | | 374 | |<----- NBPG --->| | |<----- NBPG -+-->| 375 | |<------------- msize ------------->| | ^ | 376 | | | | 377 | \@maddr (last page dbl mapped) 378 | | 379 \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ 380 381 * 382 */ 383 384 /* Double map the SCP */ 385 if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == FALSE) 386 panic("ie pmap_extract"); 387 388 pmap_enter(pmap_kernel(), trunc_page(IEOB_ADBASE+IE_SCP_ADDR), 389 pa | PMAP_NC /*| PMAP_IOC*/, 390 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 391 392 /* Map iscp at location 0 (relative to `maddr') */ 393 sc->iscp = 0; 394 395 /* scb follows iscp */ 396 sc->scb = IE_ISCP_SZ; 397 398 /* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */ 399 sc->scp = IE_SCP_ADDR & PGOFSET; 400 401 /* Calculate the 24-bit base of i82586 operations */ 402 iebase = (u_long)sc->sc_dmamap->dm_segs[0].ds_addr - 403 (u_long)IEOB_ADBASE; 404 ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb); 405 ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase); 406 ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp); 407 408 /* 409 * Rest of first page is unused (wasted!); the other pages 410 * are used for buffers. 411 */ 412 sc->buf_area = NBPG; 413 sc->buf_area_sz = msize - NBPG; 414 415 if (i82586_proberam(sc) == 0) { 416 printf(": memory probe failed\n"); 417 return; 418 } 419 420 myetheraddr(myaddr); 421 i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); 422 423 /* Establish interrupt channel */ 424 ih = bus_intr_establish(oba->oba_bustag, 425 oba->oba_pri, IPL_NET, 0, 426 i82586_intr, sc); 427 } 428
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