if_ie_obio.c revision 1.35
1/* $NetBSD: if_ie_obio.c,v 1.35 2007/03/04 06:00:44 christos 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/cdefs.h> 88__KERNEL_RCSID(0, "$NetBSD: if_ie_obio.c,v 1.35 2007/03/04 06:00:44 christos Exp $"); 89 90#include <sys/param.h> 91#include <sys/systm.h> 92#include <sys/errno.h> 93#include <sys/device.h> 94#include <sys/malloc.h> 95#include <sys/protosw.h> 96#include <sys/socket.h> 97 98#include <net/if.h> 99#include <net/if_types.h> 100#include <net/if_dl.h> 101#include <net/if_media.h> 102#include <net/if_ether.h> 103 104#include <uvm/uvm_extern.h> 105 106#include <machine/bus.h> 107#include <machine/intr.h> 108#include <machine/autoconf.h> 109 110#include <dev/ic/i82586reg.h> 111#include <dev/ic/i82586var.h> 112 113/* 114 * the on-board interface 115 */ 116struct ieob { 117 u_char obctrl; 118}; 119#define IEOB_NORSET 0x80 /* don't reset the board */ 120#define IEOB_ONAIR 0x40 /* put us on the air */ 121#define IEOB_ATTEN 0x20 /* attention! */ 122#define IEOB_IENAB 0x10 /* interrupt enable */ 123#define IEOB_XXXXX 0x08 /* free bit */ 124#define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ 125#define IEOB_BUSERR 0x02 /* bus error */ 126#define IEOB_INT 0x01 /* interrupt */ 127 128#define IEOB_ADBASE 0xff000000 /* KVA base addr of 24 bit address space */ 129 130 131static void ie_obreset(struct ie_softc *, int); 132static void ie_obattend(struct ie_softc *, int); 133static void ie_obrun(struct ie_softc *); 134 135int ie_obio_match(struct device *, struct cfdata *, void *); 136void ie_obio_attach(struct device *, struct device *, void *); 137 138CFATTACH_DECL(ie_obio, sizeof(struct ie_softc), 139 ie_obio_match, ie_obio_attach, NULL, NULL); 140 141/* Supported media */ 142static int media[] = { 143 IFM_ETHER | IFM_10_2, 144}; 145#define NMEDIA (sizeof(media) / sizeof(media[0])) 146 147 148/* 149 * OBIO ie support routines 150 */ 151static void 152ie_obreset(struct ie_softc *sc, int what) 153{ 154 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 155 156 ieo->obctrl = 0; 157 delay(100); /* XXX could be shorter? */ 158 ieo->obctrl = IEOB_NORSET; 159} 160 161static void 162ie_obattend(struct ie_softc *sc, int why) 163{ 164 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 165 166 ieo->obctrl |= IEOB_ATTEN; /* flag! */ 167 ieo->obctrl &= ~IEOB_ATTEN; /* down. */ 168} 169 170static void 171ie_obrun(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(struct ie_softc *, void *, int, size_t); 179void ie_obio_memcopyout(struct ie_softc *, const void *, int, size_t); 180 181/* 182 * Copy board memory to kernel. 183 */ 184void 185ie_obio_memcopyin(struct ie_softc *sc, void *p, int offset, size_t size) 186{ 187 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 188 189 wcopy(addr, p, size); 190} 191 192/* 193 * Copy from kernel space to naord memory. 194 */ 195void 196ie_obio_memcopyout(struct ie_softc *sc, const void *p, int offset, size_t size) 197{ 198 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 199 200 wcopy(p, addr, size); 201} 202 203/* read a 16-bit value at BH offset */ 204uint16_t ie_obio_read16(struct ie_softc *, int); 205/* write a 16-bit value at BH offset */ 206void ie_obio_write16(struct ie_softc *, int, uint16_t); 207void ie_obio_write24(struct ie_softc *, int, int); 208 209uint16_t 210ie_obio_read16(struct ie_softc *sc, int offset) 211{ 212 uint16_t v = bus_space_read_2(sc->bt, sc->bh, offset); 213 214 return (((v&0xff)<<8) | ((v>>8)&0xff)); 215} 216 217void 218ie_obio_write16(struct ie_softc *sc, int offset, uint16_t v) 219{ 220 v = (((v&0xff)<<8) | ((v>>8)&0xff)); 221 bus_space_write_2(sc->bt, sc->bh, offset, v); 222} 223 224void 225ie_obio_write24(struct ie_softc *sc, int offset, int addr) 226{ 227 u_char *f = (u_char *)&addr; 228 uint16_t v0, v1; 229 u_char *t; 230 231 t = (u_char *)&v0; 232 t[0] = f[3]; t[1] = f[2]; 233 bus_space_write_2(sc->bt, sc->bh, offset, v0); 234 235 t = (u_char *)&v1; 236 t[0] = f[1]; t[1] = 0; 237 bus_space_write_2(sc->bt, sc->bh, offset+2, v1); 238} 239 240int 241ie_obio_match(struct device *parent, struct cfdata *cf, void *aux) 242{ 243 union obio_attach_args *uoba = aux; 244 struct obio4_attach_args *oba; 245 246 if (uoba->uoba_isobio4 == 0) 247 return (0); 248 249 oba = &uoba->uoba_oba4; 250 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 251 1, /* probe size */ 252 0, /* offset */ 253 0, /* flags */ 254 NULL, NULL)); 255} 256 257void 258ie_obio_attach(struct device *parent, struct device *self, void *aux) 259{ 260 union obio_attach_args *uoba = aux; 261 struct obio4_attach_args *oba = &uoba->uoba_oba4; 262 struct ie_softc *sc = (void *) self; 263 bus_dma_tag_t dmatag = oba->oba_dmatag; 264 bus_space_handle_t bh; 265 bus_dma_segment_t seg; 266 int rseg; 267 int error; 268 paddr_t pa; 269 struct intrhand *ih; 270 bus_size_t memsize; 271 u_long iebase; 272 uint8_t myaddr[ETHER_ADDR_LEN]; 273 274 sc->bt = oba->oba_bustag; 275 276 sc->hwreset = ie_obreset; 277 sc->chan_attn = ie_obattend; 278 sc->hwinit = ie_obrun; 279 sc->memcopyout = ie_obio_memcopyout; 280 sc->memcopyin = ie_obio_memcopyin; 281 282 sc->ie_bus_barrier = NULL; 283 sc->ie_bus_read16 = ie_obio_read16; 284 sc->ie_bus_write16 = ie_obio_write16; 285 sc->ie_bus_write24 = ie_obio_write24; 286 sc->sc_msize = memsize = 65536; /* XXX */ 287 288 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 289 sizeof(struct ieob), 290 BUS_SPACE_MAP_LINEAR, 291 &bh) != 0) { 292 printf("%s: cannot map registers\n", self->dv_xname); 293 return; 294 } 295 sc->sc_reg = (void *)bh; 296 297 /* 298 * Allocate control & buffer memory. 299 */ 300 if ((error = bus_dmamap_create(dmatag, memsize, 1, memsize, 0, 301 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 302 &sc->sc_dmamap)) != 0) { 303 printf("%s: DMA map create error %d\n", 304 sc->sc_dev.dv_xname, error); 305 return; 306 } 307 if ((error = bus_dmamem_alloc(dmatag, memsize, 64*1024, 0, 308 &seg, 1, &rseg, 309 BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 310 printf("%s: DMA memory allocation error %d\n", 311 self->dv_xname, error); 312 return; 313 } 314 315 /* Map DMA buffer in CPU addressable space */ 316 if ((error = bus_dmamem_map(dmatag, &seg, rseg, memsize, 317 (void **)&sc->sc_maddr, 318 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 319 printf("%s: DMA buffer map error %d\n", 320 sc->sc_dev.dv_xname, error); 321 bus_dmamem_free(dmatag, &seg, rseg); 322 return; 323 } 324 325 /* Load the segment */ 326 if ((error = bus_dmamap_load(dmatag, sc->sc_dmamap, 327 sc->sc_maddr, memsize, NULL, 328 BUS_DMA_NOWAIT)) != 0) { 329 printf("%s: DMA buffer map load error %d\n", 330 sc->sc_dev.dv_xname, error); 331 bus_dmamem_unmap(dmatag, sc->sc_maddr, memsize); 332 bus_dmamem_free(dmatag, &seg, rseg); 333 return; 334 } 335 336 wzero(sc->sc_maddr, memsize); 337 sc->bh = (bus_space_handle_t)(sc->sc_maddr); 338 339 /* 340 * The i82586's 24-bit address space maps to the last 16MB of 341 * KVA space (). In addition, the SCP must appear 342 * at IE_SCP_ADDR within the 24-bit address space, 343 * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of 344 * kernel space. We double-map this last page to the first 345 * page (starting at `maddr') of the memory we allocate to the chip. 346 * (a side-effect of this double-map is that the ISCP and SCB 347 * structures also get aliased there, but we ignore this). The 348 * first page at `maddr' is only used for ISCP, SCB and the aliased 349 * SCP; the actual buffers start at maddr+PAGE_SIZE. 350 * 351 * In a picture: 352 353 |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| 354 | | | | | | | 355 | |<---PAGE_SIZE-->| | |<--PAGE_SIZE-+-->| 356 | |<------------ memsize ------------>| | ^ | 357 | | | | 358 | \@maddr (last page dbl mapped) 359 | | 360 \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ 361 362 * 363 */ 364 365 /* Double map the SCP */ 366 if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == false) 367 panic("ie pmap_extract"); 368 369 pmap_enter(pmap_kernel(), trunc_page(IEOB_ADBASE+IE_SCP_ADDR), 370 pa | PMAP_NC /*| PMAP_IOC*/, 371 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 372 pmap_update(pmap_kernel()); 373 374 /* Map iscp at location 0 (relative to `maddr') */ 375 sc->iscp = 0; 376 377 /* scb follows iscp */ 378 sc->scb = IE_ISCP_SZ; 379 380 /* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */ 381 sc->scp = IE_SCP_ADDR & PGOFSET; 382 383 /* Calculate the 24-bit base of i82586 operations */ 384 iebase = (u_long)sc->sc_dmamap->dm_segs[0].ds_addr - 385 (u_long)IEOB_ADBASE; 386 ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb); 387 ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase); 388 ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp); 389 390 /* 391 * Rest of first page is unused (wasted!); the other pages 392 * are used for buffers. 393 */ 394 sc->buf_area = PAGE_SIZE; 395 sc->buf_area_sz = memsize - PAGE_SIZE; 396 397 if (i82586_proberam(sc) == 0) { 398 printf(": memory probe failed\n"); 399 return; 400 } 401 402 prom_getether(0, myaddr); 403 i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); 404 405 /* Establish interrupt channel */ 406 ih = bus_intr_establish(oba->oba_bustag, 407 oba->oba_pri, IPL_NET, 408 i82586_intr, sc); 409} 410