1/* $NetBSD: if_ie_obio.c,v 1.39 2011/06/03 16:28:40 tsutsui 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 * 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/* 33 * Copyright (c) 1995 Charles D. Cranor 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 58 59/* 60 * Sparc OBIO front-end for the Intel 82586 Ethernet driver 61 * 62 * Converted to SUN ie driver by Charles D. Cranor, 63 * October 1994, January 1995. 64 */ 65 66/* 67 * The i82586 is a very painful chip, found in sun3's, sun-4/100's 68 * sun-4/200's, and VME based suns. The byte order is all wrong for a 69 * SUN, making life difficult. Programming this chip is mostly the same, 70 * but certain details differ from system to system. This driver is 71 * written so that different "ie" interfaces can be controled by the same 72 * driver. 73 */ 74 75#include <sys/cdefs.h> 76__KERNEL_RCSID(0, "$NetBSD: if_ie_obio.c,v 1.39 2011/06/03 16:28:40 tsutsui Exp $"); 77 78#include <sys/param.h> 79#include <sys/systm.h> 80#include <sys/errno.h> 81#include <sys/device.h> 82#include <sys/malloc.h> 83#include <sys/protosw.h> 84#include <sys/socket.h> 85 86#include <net/if.h> 87#include <net/if_types.h> 88#include <net/if_dl.h> 89#include <net/if_media.h> 90#include <net/if_ether.h> 91 92#include <uvm/uvm_extern.h> 93 94#include <sys/bus.h> 95#include <machine/intr.h> 96#include <machine/autoconf.h> 97 98#include <dev/ic/i82586reg.h> 99#include <dev/ic/i82586var.h> 100 101/* 102 * the on-board interface 103 */ 104struct ieob { 105 u_char obctrl; 106}; 107#define IEOB_NORSET 0x80 /* don't reset the board */ 108#define IEOB_ONAIR 0x40 /* put us on the air */ 109#define IEOB_ATTEN 0x20 /* attention! */ 110#define IEOB_IENAB 0x10 /* interrupt enable */ 111#define IEOB_XXXXX 0x08 /* free bit */ 112#define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ 113#define IEOB_BUSERR 0x02 /* bus error */ 114#define IEOB_INT 0x01 /* interrupt */ 115 116#define IEOB_ADBASE 0xff000000 /* KVA base addr of 24 bit address space */ 117 118 119static void ie_obreset(struct ie_softc *, int); 120static void ie_obattend(struct ie_softc *, int); 121static void ie_obrun(struct ie_softc *); 122 123int ie_obio_match(device_t, cfdata_t, void *); 124void ie_obio_attach(device_t, device_t, void *); 125 126CFATTACH_DECL_NEW(ie_obio, sizeof(struct ie_softc), 127 ie_obio_match, ie_obio_attach, NULL, NULL); 128 129/* Supported media */ 130static int media[] = { 131 IFM_ETHER | IFM_10_2, 132}; 133#define NMEDIA (sizeof(media) / sizeof(media[0])) 134 135 136/* 137 * OBIO ie support routines 138 */ 139static void 140ie_obreset(struct ie_softc *sc, int what) 141{ 142 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 143 144 ieo->obctrl = 0; 145 delay(100); /* XXX could be shorter? */ 146 ieo->obctrl = IEOB_NORSET; 147} 148 149static void 150ie_obattend(struct ie_softc *sc, int why) 151{ 152 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 153 154 ieo->obctrl |= IEOB_ATTEN; /* flag! */ 155 ieo->obctrl &= ~IEOB_ATTEN; /* down. */ 156} 157 158static void 159ie_obrun(struct ie_softc *sc) 160{ 161 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 162 163 ieo->obctrl |= (IEOB_ONAIR|IEOB_IENAB|IEOB_NORSET); 164} 165 166void ie_obio_memcopyin(struct ie_softc *, void *, int, size_t); 167void ie_obio_memcopyout(struct ie_softc *, const void *, int, size_t); 168 169/* 170 * Copy board memory to kernel. 171 */ 172void 173ie_obio_memcopyin(struct ie_softc *sc, void *p, int offset, size_t size) 174{ 175 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 176 177 wcopy(addr, p, size); 178} 179 180/* 181 * Copy from kernel space to naord memory. 182 */ 183void 184ie_obio_memcopyout(struct ie_softc *sc, const void *p, int offset, size_t size) 185{ 186 void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ 187 188 wcopy(p, addr, size); 189} 190 191/* read a 16-bit value at BH offset */ 192uint16_t ie_obio_read16(struct ie_softc *, int); 193/* write a 16-bit value at BH offset */ 194void ie_obio_write16(struct ie_softc *, int, uint16_t); 195void ie_obio_write24(struct ie_softc *, int, int); 196 197uint16_t 198ie_obio_read16(struct ie_softc *sc, int offset) 199{ 200 uint16_t v = bus_space_read_2(sc->bt, sc->bh, offset); 201 202 return (((v&0xff)<<8) | ((v>>8)&0xff)); 203} 204 205void 206ie_obio_write16(struct ie_softc *sc, int offset, uint16_t v) 207{ 208 v = (((v&0xff)<<8) | ((v>>8)&0xff)); 209 bus_space_write_2(sc->bt, sc->bh, offset, v); 210} 211 212void 213ie_obio_write24(struct ie_softc *sc, int offset, int addr) 214{ 215 u_char *f = (u_char *)&addr; 216 uint16_t v0, v1; 217 u_char *t; 218 219 t = (u_char *)&v0; 220 t[0] = f[3]; t[1] = f[2]; 221 bus_space_write_2(sc->bt, sc->bh, offset, v0); 222 223 t = (u_char *)&v1; 224 t[0] = f[1]; t[1] = 0; 225 bus_space_write_2(sc->bt, sc->bh, offset+2, v1); 226} 227 228int 229ie_obio_match(device_t parent, cfdata_t cf, void *aux) 230{ 231 union obio_attach_args *uoba = aux; 232 struct obio4_attach_args *oba; 233 234 if (uoba->uoba_isobio4 == 0) 235 return (0); 236 237 oba = &uoba->uoba_oba4; 238 return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 239 1, /* probe size */ 240 0, /* offset */ 241 0, /* flags */ 242 NULL, NULL)); 243} 244 245void 246ie_obio_attach(device_t parent, device_t self, void *aux) 247{ 248 union obio_attach_args *uoba = aux; 249 struct obio4_attach_args *oba = &uoba->uoba_oba4; 250 struct ie_softc *sc = device_private(self); 251 bus_dma_tag_t dmatag = oba->oba_dmatag; 252 bus_space_handle_t bh; 253 bus_dma_segment_t seg; 254 int rseg; 255 int error; 256 paddr_t pa; 257 struct intrhand *ih; 258 bus_size_t memsize; 259 u_long iebase; 260 uint8_t myaddr[ETHER_ADDR_LEN]; 261 262 sc->sc_dev = self; 263 sc->bt = oba->oba_bustag; 264 265 sc->hwreset = ie_obreset; 266 sc->chan_attn = ie_obattend; 267 sc->hwinit = ie_obrun; 268 sc->memcopyout = ie_obio_memcopyout; 269 sc->memcopyin = ie_obio_memcopyin; 270 271 sc->ie_bus_barrier = NULL; 272 sc->ie_bus_read16 = ie_obio_read16; 273 sc->ie_bus_write16 = ie_obio_write16; 274 sc->ie_bus_write24 = ie_obio_write24; 275 sc->sc_msize = memsize = 65536; /* XXX */ 276 277 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 278 sizeof(struct ieob), 279 BUS_SPACE_MAP_LINEAR, 280 &bh) != 0) { 281 printf("%s: cannot map registers\n", device_xname(self)); 282 return; 283 } 284 sc->sc_reg = (void *)bh; 285 286 /* 287 * Allocate control & buffer memory. 288 */ 289 if ((error = bus_dmamap_create(dmatag, memsize, 1, memsize, 0, 290 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 291 &sc->sc_dmamap)) != 0) { 292 printf("%s: DMA map create error %d\n", 293 device_xname(self), error); 294 return; 295 } 296 if ((error = bus_dmamem_alloc(dmatag, memsize, 64*1024, 0, 297 &seg, 1, &rseg, 298 BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 299 printf("%s: DMA memory allocation error %d\n", 300 device_xname(self), error); 301 return; 302 } 303 304 /* Map DMA buffer in CPU addressable space */ 305 if ((error = bus_dmamem_map(dmatag, &seg, rseg, memsize, 306 (void **)&sc->sc_maddr, 307 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 308 printf("%s: DMA buffer map error %d\n", 309 device_xname(self), error); 310 bus_dmamem_free(dmatag, &seg, rseg); 311 return; 312 } 313 314 /* Load the segment */ 315 if ((error = bus_dmamap_load(dmatag, sc->sc_dmamap, 316 sc->sc_maddr, memsize, NULL, 317 BUS_DMA_NOWAIT)) != 0) { 318 printf("%s: DMA buffer map load error %d\n", 319 device_xname(self), error); 320 bus_dmamem_unmap(dmatag, sc->sc_maddr, memsize); 321 bus_dmamem_free(dmatag, &seg, rseg); 322 return; 323 } 324 325 wzero(sc->sc_maddr, memsize); 326 sc->bh = (bus_space_handle_t)(sc->sc_maddr); 327 328 /* 329 * The i82586's 24-bit address space maps to the last 16MB of 330 * KVA space (). In addition, the SCP must appear 331 * at IE_SCP_ADDR within the 24-bit address space, 332 * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of 333 * kernel space. We double-map this last page to the first 334 * page (starting at `maddr') of the memory we allocate to the chip. 335 * (a side-effect of this double-map is that the ISCP and SCB 336 * structures also get aliased there, but we ignore this). The 337 * first page at `maddr' is only used for ISCP, SCB and the aliased 338 * SCP; the actual buffers start at maddr+PAGE_SIZE. 339 * 340 * In a picture: 341 342 |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| 343 | | | | | | | 344 | |<---PAGE_SIZE-->| | |<--PAGE_SIZE-+-->| 345 | |<------------ memsize ------------>| | ^ | 346 | | | | 347 | \@maddr (last page dbl mapped) 348 | | 349 \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ 350 351 * 352 */ 353 354 /* Double map the SCP */ 355 if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == false) 356 panic("ie pmap_extract"); 357 358 pmap_enter(pmap_kernel(), trunc_page(IEOB_ADBASE+IE_SCP_ADDR), 359 pa | PMAP_NC /*| PMAP_IOC*/, 360 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 361 pmap_update(pmap_kernel()); 362 363 /* Map iscp at location 0 (relative to `maddr') */ 364 sc->iscp = 0; 365 366 /* scb follows iscp */ 367 sc->scb = IE_ISCP_SZ; 368 369 /* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */ 370 sc->scp = IE_SCP_ADDR & PGOFSET; 371 372 /* Calculate the 24-bit base of i82586 operations */ 373 iebase = (u_long)sc->sc_dmamap->dm_segs[0].ds_addr - 374 (u_long)IEOB_ADBASE; 375 ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb); 376 ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase); 377 ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp); 378 379 /* 380 * Rest of first page is unused (wasted!); the other pages 381 * are used for buffers. 382 */ 383 sc->buf_area = PAGE_SIZE; 384 sc->buf_area_sz = memsize - PAGE_SIZE; 385 386 if (i82586_proberam(sc) == 0) { 387 printf(": memory probe failed\n"); 388 return; 389 } 390 391 prom_getether(0, myaddr); 392 i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); 393 394 /* Establish interrupt channel */ 395 ih = bus_intr_establish(oba->oba_bustag, 396 oba->oba_pri, IPL_NET, 397 i82586_intr, sc); 398} 399