1 /* $NetBSD: if_ie_obio.c,v 1.38 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. 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 1.38 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 98 #include <dev/ic/i82586reg.h> 99 #include <dev/ic/i82586var.h> 100 101 /* 102 * the on-board interface 103 */ 104 struct 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 */ 117 118 119 static void ie_obreset(struct ie_softc *, int); 120 static void ie_obattend(struct ie_softc *, int); 121 static void ie_obrun(struct ie_softc *); 122 123 int ie_obio_match(device_t, cfdata_t, void *); 124 void ie_obio_attach(device_t, device_t, void *); 125 126 CFATTACH_DECL(ie_obio, sizeof(struct ie_softc), 127 ie_obio_match, ie_obio_attach, NULL, NULL); 128 129 /* Supported media */ 130 static 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 */ 139 static void 140 ie_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 } 148 149 static void 150 ie_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 } 157 158 static void 159 ie_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 } 165 166 void ie_obio_memcopyin(struct ie_softc *, void *, int, size_t); 167 void ie_obio_memcopyout(struct ie_softc *, const void *, int, size_t); 168 169 /* 170 * Copy board memory to kernel. 171 */ 172 void 173 ie_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 */ 183 void 184 ie_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 */ 192 uint16_t ie_obio_read16(struct ie_softc *, int); 193 /* write a 16-bit value at BH offset */ 194 void ie_obio_write16(struct ie_softc *, int, uint16_t); 195 void ie_obio_write24(struct ie_softc *, int, int); 196 197 uint16_t 198 ie_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 } 204 205 void 206 ie_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 } 211 212 void 213 ie_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 } 227 228 int 229 ie_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 } 244 245 void 246 ie_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->bt = oba->oba_bustag; 263 264 sc->hwreset = ie_obreset; 265 sc->chan_attn = ie_obattend; 266 sc->hwinit = ie_obrun; 267 sc->memcopyout = ie_obio_memcopyout; 268 sc->memcopyin = ie_obio_memcopyin; 269 270 sc->ie_bus_barrier = NULL; 271 sc->ie_bus_read16 = ie_obio_read16; 272 sc->ie_bus_write16 = ie_obio_write16; 273 sc->ie_bus_write24 = ie_obio_write24; 274 sc->sc_msize = memsize = 65536; /* XXX */ 275 276 if (bus_space_map(oba->oba_bustag, oba->oba_paddr, 277 sizeof(struct ieob), 278 BUS_SPACE_MAP_LINEAR, 279 &bh) != 0) { 280 printf("%s: cannot map registers\n", device_xname(self)); 281 return; 282 } 283 sc->sc_reg = (void *)bh; 284 285 /* 286 * Allocate control & buffer memory. 287 */ 288 if ((error = bus_dmamap_create(dmatag, memsize, 1, memsize, 0, 289 BUS_DMA_NOWAIT|BUS_DMA_24BIT, 290 &sc->sc_dmamap)) != 0) { 291 printf("%s: DMA map create error %d\n", 292 device_xname(self), error); 293 return; 294 } 295 if ((error = bus_dmamem_alloc(dmatag, memsize, 64*1024, 0, 296 &seg, 1, &rseg, 297 BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { 298 printf("%s: DMA memory allocation error %d\n", 299 device_xname(self), error); 300 return; 301 } 302 303 /* Map DMA buffer in CPU addressable space */ 304 if ((error = bus_dmamem_map(dmatag, &seg, rseg, memsize, 305 (void **)&sc->sc_maddr, 306 BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { 307 printf("%s: DMA buffer map error %d\n", 308 device_xname(self), error); 309 bus_dmamem_free(dmatag, &seg, rseg); 310 return; 311 } 312 313 /* Load the segment */ 314 if ((error = bus_dmamap_load(dmatag, sc->sc_dmamap, 315 sc->sc_maddr, memsize, NULL, 316 BUS_DMA_NOWAIT)) != 0) { 317 printf("%s: DMA buffer map load error %d\n", 318 device_xname(self), error); 319 bus_dmamem_unmap(dmatag, sc->sc_maddr, memsize); 320 bus_dmamem_free(dmatag, &seg, rseg); 321 return; 322 } 323 324 wzero(sc->sc_maddr, memsize); 325 sc->bh = (bus_space_handle_t)(sc->sc_maddr); 326 327 /* 328 * The i82586's 24-bit address space maps to the last 16MB of 329 * KVA space (). In addition, the SCP must appear 330 * at IE_SCP_ADDR within the 24-bit address space, 331 * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of 332 * kernel space. We double-map this last page to the first 333 * page (starting at `maddr') of the memory we allocate to the chip. 334 * (a side-effect of this double-map is that the ISCP and SCB 335 * structures also get aliased there, but we ignore this). The 336 * first page at `maddr' is only used for ISCP, SCB and the aliased 337 * SCP; the actual buffers start at maddr+PAGE_SIZE. 338 * 339 * In a picture: 340 341 |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| 342 | | | | | | | 343 | |<---PAGE_SIZE-->| | |<--PAGE_SIZE-+-->| 344 | |<------------ memsize ------------>| | ^ | 345 | | | | 346 | \@maddr (last page dbl mapped) 347 | | 348 \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ 349 350 * 351 */ 352 353 /* Double map the SCP */ 354 if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == false) 355 panic("ie pmap_extract"); 356 357 pmap_enter(pmap_kernel(), trunc_page(IEOB_ADBASE+IE_SCP_ADDR), 358 pa | PMAP_NC /*| PMAP_IOC*/, 359 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 360 pmap_update(pmap_kernel()); 361 362 /* Map iscp at location 0 (relative to `maddr') */ 363 sc->iscp = 0; 364 365 /* scb follows iscp */ 366 sc->scb = IE_ISCP_SZ; 367 368 /* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */ 369 sc->scp = IE_SCP_ADDR & PGOFSET; 370 371 /* Calculate the 24-bit base of i82586 operations */ 372 iebase = (u_long)sc->sc_dmamap->dm_segs[0].ds_addr - 373 (u_long)IEOB_ADBASE; 374 ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb); 375 ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase); 376 ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp); 377 378 /* 379 * Rest of first page is unused (wasted!); the other pages 380 * are used for buffers. 381 */ 382 sc->buf_area = PAGE_SIZE; 383 sc->buf_area_sz = memsize - PAGE_SIZE; 384 385 if (i82586_proberam(sc) == 0) { 386 printf(": memory probe failed\n"); 387 return; 388 } 389 390 prom_getether(0, myaddr); 391 i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); 392 393 /* Establish interrupt channel */ 394 ih = bus_intr_establish(oba->oba_bustag, 395 oba->oba_pri, IPL_NET, 396 i82586_intr, sc); 397 } 398