1 /* $NetBSD: if_ie_obio.c,v 1.14 2011/02/01 20:19:31 chuck 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 and Matt Fredette. 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 * Sun2 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 sun[23]'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 1.14 2011/02/01 20:19:31 chuck 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 <machine/bus.h> 95 #include <machine/intr.h> 96 #include <machine/autoconf.h> 97 #include <machine/idprom.h> 98 99 #include <dev/ic/i82586reg.h> 100 #include <dev/ic/i82586var.h> 101 102 /* 103 * the on-board interface 104 */ 105 struct ieob { 106 u_char obctrl; 107 }; 108 #define IEOB_NORSET 0x80 /* don't reset the board */ 109 #define IEOB_ONAIR 0x40 /* put us on the air */ 110 #define IEOB_ATTEN 0x20 /* attention! */ 111 #define IEOB_IENAB 0x10 /* interrupt enable */ 112 #define IEOB_XXXXX 0x08 /* free bit */ 113 #define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ 114 #define IEOB_BUSERR 0x02 /* bus error */ 115 #define IEOB_INT 0x01 /* interrupt */ 116 117 #define IEOB_ADBASE 0x000000 /* KVA base addr of 24 bit address space */ 118 119 120 static void ie_obreset(struct ie_softc *, int); 121 static void ie_obattend(struct ie_softc *, int); 122 static void ie_obrun(struct ie_softc *); 123 124 int ie_obio_match(struct device *, struct cfdata *, void *); 125 void ie_obio_attach(struct device *, struct device *, void *); 126 127 CFATTACH_DECL(ie_obio, sizeof(struct ie_softc), 128 ie_obio_match, ie_obio_attach, NULL, NULL); 129 130 /* Supported media */ 131 static int media[] = { 132 IFM_ETHER | IFM_10_2, 133 }; 134 #define NMEDIA (sizeof(media) / sizeof(media[0])) 135 136 137 /* 138 * OBIO ie support routines 139 */ 140 void 141 ie_obreset(struct ie_softc *sc, int what) 142 { 143 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 144 ieo->obctrl = 0; 145 delay(100); /* XXX could be shorter? */ 146 ieo->obctrl = IEOB_NORSET; 147 } 148 void 149 ie_obattend(struct ie_softc *sc, int why) 150 { 151 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 152 153 ieo->obctrl |= IEOB_ATTEN; /* flag! */ 154 ieo->obctrl &= ~IEOB_ATTEN; /* down. */ 155 } 156 157 void 158 ie_obrun(struct ie_softc *sc) 159 { 160 volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; 161 162 ieo->obctrl |= (IEOB_ONAIR|IEOB_IENAB|IEOB_NORSET); 163 } 164 165 void ie_obio_memcopyin(struct ie_softc *, void *, int, size_t); 166 void ie_obio_memcopyout(struct ie_softc *, const void *, int, size_t); 167 168 /* 169 * Copy board memory to kernel. 170 */ 171 void 172 ie_obio_memcopyin(struct ie_softc *sc, void *p, int offset, size_t size) 173 { 174 bus_space_copyin(sc->bt, sc->bh, offset, p, size); 175 } 176 177 /* 178 * Copy from kernel space to naord memory. 179 */ 180 void 181 ie_obio_memcopyout(struct ie_softc *sc, const void *p, int offset, size_t size) 182 { 183 bus_space_copyout(sc->bt, sc->bh, offset, p, size); 184 } 185 186 /* read a 16-bit value at BH offset */ 187 uint16_t ie_obio_read16(struct ie_softc *, int); 188 /* write a 16-bit value at BH offset */ 189 void ie_obio_write16(struct ie_softc *, int, uint16_t); 190 void ie_obio_write24(struct ie_softc *, int, int); 191 192 uint16_t 193 ie_obio_read16(struct ie_softc *sc, int offset) 194 { 195 uint16_t v = bus_space_read_2(sc->bt, sc->bh, offset); 196 return (((v&0xff)<<8) | ((v>>8)&0xff)); 197 } 198 199 void 200 ie_obio_write16(struct ie_softc *sc, int offset, uint16_t v) 201 { 202 v = (((v&0xff)<<8) | ((v>>8)&0xff)); 203 bus_space_write_2(sc->bt, sc->bh, offset, v); 204 } 205 206 void 207 ie_obio_write24(struct ie_softc *sc, int offset, int addr) 208 { 209 u_char *f = (u_char *)&addr; 210 uint16_t v0, v1; 211 u_char *t; 212 213 t = (u_char *)&v0; 214 t[0] = f[3]; t[1] = f[2]; 215 bus_space_write_2(sc->bt, sc->bh, offset, v0); 216 217 t = (u_char *)&v1; 218 t[0] = f[1]; t[1] = 0; 219 bus_space_write_2(sc->bt, sc->bh, offset+2, v1); 220 } 221 222 int 223 ie_obio_match(struct device *parent, struct cfdata *cf, void *aux) 224 { 225 struct obio_attach_args *oba = aux; 226 bus_space_handle_t bh; 227 int matched; 228 uint8_t ctrl; 229 230 /* No default obio address. */ 231 if (oba->oba_paddr == -1) 232 return(0); 233 234 /* Make sure there is something there... */ 235 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, sizeof(struct ieob), 236 0, &bh)) 237 return (0); 238 matched = (!bus_space_poke_1(oba->oba_bustag, bh, 0, IEOB_NORSET) && 239 !bus_space_peek_1(oba->oba_bustag, bh, 0, &ctrl) && 240 (ctrl & (IEOB_ONAIR|IEOB_IENAB)) == 0); 241 bus_space_unmap(oba->oba_bustag, bh, sizeof(struct ieob)); 242 if (!matched) 243 return (0); 244 245 /* Default interrupt priority. */ 246 if (oba->oba_pri == -1) 247 oba->oba_pri = 3; 248 249 return (1); 250 } 251 252 void 253 ie_obio_attach(struct device *parent, struct device *self, void *aux) 254 { 255 struct obio_attach_args *oba = aux; 256 struct ie_softc *sc = (void *) self; 257 bus_dma_tag_t dmatag = oba->oba_dmatag; 258 bus_space_handle_t bh; 259 bus_dma_segment_t seg; 260 int rseg; 261 int error; 262 paddr_t pa; 263 struct intrhand *ih; 264 bus_size_t memsize; 265 u_long iebase; 266 uint8_t myaddr[ETHER_ADDR_LEN]; 267 268 sc->bt = oba->oba_bustag; 269 270 sc->hwreset = ie_obreset; 271 sc->chan_attn = ie_obattend; 272 sc->hwinit = ie_obrun; 273 sc->memcopyout = ie_obio_memcopyout; 274 sc->memcopyin = ie_obio_memcopyin; 275 276 sc->ie_bus_barrier = NULL; 277 sc->ie_bus_read16 = ie_obio_read16; 278 sc->ie_bus_write16 = ie_obio_write16; 279 sc->ie_bus_write24 = ie_obio_write24; 280 sc->sc_msize = memsize = 65536; /* XXX */ 281 282 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, sizeof(struct ieob), 283 0, &bh)) 284 panic("ie_obio_attach: can't map regs"); 285 sc->sc_reg = (void *)bh; 286 287 /* 288 * Allocate control & buffer memory. 289 */ 290 if ((error = bus_dmamap_create(dmatag, memsize, 1, memsize, 0, 291 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 292 &sc->sc_dmamap)) != 0) { 293 printf("%s: DMA map create error %d\n", 294 sc->sc_dev.dv_xname, error); 295 return; 296 } 297 if ((error = bus_dmamem_alloc(dmatag, memsize, 64*1024, 0, 298 &seg, 1, &rseg, 299 BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 300 printf("%s: DMA memory allocation error %d\n", 301 self->dv_xname, error); 302 return; 303 } 304 305 /* Map DMA buffer in CPU addressable space */ 306 if ((error = bus_dmamem_map(dmatag, &seg, rseg, memsize, 307 (void **)&sc->sc_maddr, 308 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 309 printf("%s: DMA buffer map error %d\n", 310 sc->sc_dev.dv_xname, error); 311 bus_dmamem_free(dmatag, &seg, rseg); 312 return; 313 } 314 315 /* Load the segment */ 316 if ((error = bus_dmamap_load(dmatag, sc->sc_dmamap, 317 sc->sc_maddr, memsize, NULL, 318 BUS_DMA_NOWAIT)) != 0) { 319 printf("%s: DMA buffer map load error %d\n", 320 sc->sc_dev.dv_xname, error); 321 bus_dmamem_unmap(dmatag, sc->sc_maddr, memsize); 322 bus_dmamem_free(dmatag, &seg, rseg); 323 return; 324 } 325 326 w16zero(sc->sc_maddr, memsize); 327 sc->bh = (bus_space_handle_t)(sc->sc_maddr); 328 329 /* 330 * The i82586's 24-bit address space maps to all of 331 * KVA space (). In addition, the SCP must appear 332 * at IE_SCP_ADDR within the 24-bit address space, 333 * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of 334 * kernel space. We double-map this last page to the first 335 * page (starting at `maddr') of the memory we allocate to the chip. 336 * (a side-effect of this double-map is that the ISCP and SCB 337 * structures also get aliased there, but we ignore this). The 338 * first page at `maddr' is only used for ISCP, SCB and the aliased 339 * SCP; the actual buffers start at maddr+PAGE_SIZE. 340 * 341 * In a picture: 342 343 |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| 344 | | | | | | | 345 | |<---PAGE_SIZE-->| | |<--PAGE_SIZE-+-->| 346 | |<------------ memsize ------------>| | ^ | 347 | | | | 348 | \@maddr (last page dbl mapped) 349 | | 350 \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ 351 352 * 353 */ 354 355 /* Double map the SCP */ 356 if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == false) 357 panic("ie pmap_extract"); 358 359 pmap_enter(pmap_kernel(), m68k_trunc_page(IEOB_ADBASE+IE_SCP_ADDR), 360 pa | PMAP_NC /*| PMAP_IOC*/, 361 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 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 idprom_etheraddr(myaddr); 392 i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); 393 394 /* Establish interrupt channel */ 395 ih = bus_intr_establish(oba->oba_bustag, oba->oba_pri, IPL_NET, 0, 396 i82586_intr, sc); 397 } 398