1 /* $NetBSD: en.c,v 1.8 2002/09/11 13:15:59 mycroft Exp $ */ 2 /* 3 * Copyright (c) 1996 Rolf Grossmann 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Rolf Grossmann. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <netinet/in.h> 35 #include <netinet/in_systm.h> 36 #include <next68k/dev/enreg.h> 37 #include <next68k/next68k/nextrom.h> 38 #include "enreg.h" 39 #include "dmareg.h" 40 41 #include <stand.h> 42 #include <netif.h> 43 #include <net.h> 44 #include <nfs.h> 45 46 #include <lib/libkern/libkern.h> 47 48 extern char *mg; 49 #define MON(type, off) (*(type *)((u_int) (mg) + off)) 50 51 #define PRINTF(x) printf x; 52 #ifdef EN_DEBUG 53 #define DPRINTF(x) printf x; 54 #else 55 #define DPRINTF(x) 56 #endif 57 58 #define EN_TIMEOUT 2000000 59 #define EN_RETRIES 10 60 61 int en_match __P((struct netif *nif, void *machdep_hint)); 62 int en_probe __P((struct netif *nif, void *machdep_hint)); 63 void en_init __P((struct iodesc *desc, void *machdep_hint)); 64 int en_get __P((struct iodesc *a, void *b, size_t c, time_t d)); 65 int en_put __P((struct iodesc *a, void *b, size_t c)); 66 void en_end __P((struct netif *a)); 67 68 /* ### static int mountroot __P((int sock)); */ 69 static int en_wait_for_intr __P((int flag)); 70 71 struct netif_stats en_stats; 72 73 struct netif_dif en_ifs[] = { 74 /* dif_unit dif_nsel dif_stats dif_private */ 75 { 0, 1, &en_stats, NULL, }, 76 }; 77 78 struct netif_driver en_driver = { 79 "en", 80 en_match, en_probe, en_init, en_get, en_put, en_end, 81 en_ifs, NENTS(en_ifs) 82 }; 83 84 extern int turbo; 85 86 /* ### int netdev_sock; 87 static int open_count; */ 88 89 char dma_buffer1[MAX_DMASIZE+DMA_ENDALIGNMENT], 90 dma_buffer2[MAX_DMASIZE+DMA_ENDALIGNMENT], 91 *dma_buffers[2]; 92 int next_dma_buffer; 93 94 95 int 96 en_match(struct netif *nif, void *machdep_hint) 97 { 98 /* we always match, because every NeXT has an ethernet interface 99 * and we've checked the unit numbers before we even started this 100 * search. 101 * ### now that open is generic, we should check the params! 102 */ 103 return 1; 104 } 105 106 int 107 en_probe(struct netif *nif, void *machdep_hint) 108 { 109 /* we also always probe ok, see en_match. */ 110 return 0; 111 } 112 113 void 114 en_init(struct iodesc *desc, void *machdep_hint) 115 { 116 volatile struct en_regs *er; 117 volatile u_int *bmap_chip; 118 int i; 119 120 DPRINTF(("en_init\n")); 121 122 er = (struct en_regs *)P_ENET; 123 bmap_chip = (u_int *)P_BMAP; 124 125 dma_buffers[0] = DMA_ALIGN(char *, dma_buffer1); 126 dma_buffers[1] = DMA_ALIGN(char *, dma_buffer2); 127 128 er->reset = EN_RST_RESET; 129 /* if (turbo) */ 130 /* er->reset = 0; */ 131 132 er->txmask = 0; 133 er->txstat = 0xff; 134 if (turbo) 135 er->txmode = 0 | EN_TMD_COLLSHIFT; 136 else 137 er->txmode = EN_TMD_LB_DISABLE; 138 139 /* setup for bnc/tp */ 140 if (!turbo) { 141 DPRINTF (("en_media: %s\n", 142 (bmap_chip[13] & 0x20000000) ? "BNC" : "TP")); 143 if (!(bmap_chip[13] & 0x20000000)) { 144 bmap_chip[12] |= 0x90000000; 145 bmap_chip[13] |= (0x80000000|0x10000000); /* TP */ 146 } 147 } 148 149 /* if (turbo) { */ 150 /* er->txmode |= EN_TMD_COLLSHIFT; */ 151 /* } else { */ 152 /* er->txmode &= ~EN_TMD_LB_DISABLE; /\* ZZZ *\/ */ 153 /* } */ 154 155 er->rxmask = 0; 156 er->rxstat = 0xff; 157 if (turbo) 158 er->rxmode = EN_RMD_TEST | EN_RMD_RECV_NORMAL; 159 else 160 er->rxmode = EN_RMD_RECV_NORMAL; 161 for (i=0; i<6; i++) 162 er->addr[i] = desc->myea[i] = MON(char *,MG_clientetheraddr)[i]; 163 164 DPRINTF(("ethernet addr (%x:%x:%x:%x:%x:%x)\n", 165 desc->myea[0],desc->myea[1],desc->myea[2], 166 desc->myea[3],desc->myea[4],desc->myea[5])); 167 168 /* if (!turbo) */ 169 er->reset = 0; 170 } 171 172 #if 0 173 /* ### remove this when things work! */ 174 #define XCHR(x) "0123456789abcdef"[(x) & 0xf] 175 void 176 dump_pkt(unsigned char *pkt, size_t len) 177 { 178 size_t i, j; 179 180 printf("0000: "); 181 for(i=0; i<len; i++) { 182 printf("%c%c ", XCHR(pkt[i]>>4), XCHR(pkt[i])); 183 if ((i+1) % 16 == 0) { 184 printf(" %c", '"'); 185 for(j=0; j<16; j++) 186 printf("%c", pkt[i-15+j]>=32 && pkt[i-15+j]<127?pkt[i-15+j]:'.'); 187 printf("%c\n%c%c%c%c: ", '"', XCHR((i+1)>>12), 188 XCHR((i+1)>>8), XCHR((i+1)>>4), XCHR(i+1)); 189 } 190 } 191 printf("\n"); 192 } 193 #endif 194 195 int 196 en_put(struct iodesc *desc, void *pkt, size_t len) 197 { 198 volatile struct en_regs *er; 199 volatile struct dma_dev *txdma; 200 int state, txs; 201 int retries; 202 203 DPRINTF(("en_put: %d bytes at 0x%lx\n", len, (unsigned long)pkt)); 204 #if 0 205 dump_pkt(pkt,len); 206 #endif 207 208 er = (struct en_regs *)P_ENET; 209 txdma = (struct dma_dev *)P_ENETX_CSR; 210 211 DPRINTF(("en_put: txdma->dd_csr = %x\n",txdma->dd_csr)); 212 213 if (len > 1600) { 214 errno = EINVAL; 215 return -1; 216 } 217 218 if (!turbo) { 219 while ((er->txstat & EN_TXS_READY) == 0) 220 printf("en: tx not ready\n"); 221 } 222 223 for (retries = 0; retries < EN_RETRIES; retries++) { 224 er->txstat = 0xff; 225 bcopy(pkt, dma_buffers[0], len); 226 txdma->dd_csr = (turbo ? DMACSR_INITBUFTURBO : DMACSR_INITBUF) | 227 DMACSR_RESET | DMACSR_WRITE; 228 txdma->dd_csr = 0; 229 txdma->dd_next/* _initbuf */ = dma_buffers[0]; 230 txdma->dd_start = (turbo ? dma_buffers[0] : 0); 231 txdma->dd_limit = ENDMA_ENDALIGN(char *, dma_buffers[0]+len); 232 txdma->dd_stop = 0; 233 txdma->dd_csr = DMACSR_SETENABLE; 234 if (turbo) 235 er->txmode |= 0x80; 236 237 while(1) { 238 if (en_wait_for_intr(ENETX_DMA_INTR)) { 239 printf("en_put: timed out\n"); 240 errno = EIO; 241 return -1; 242 } 243 244 state = txdma->dd_csr & 245 (DMACSR_BUSEXC | DMACSR_COMPLETE 246 | DMACSR_SUPDATE | DMACSR_ENABLE); 247 248 #if 01 249 DPRINTF(("en_put: dma state = 0x%x.\n", state)); 250 #endif 251 if (state & (DMACSR_COMPLETE|DMACSR_BUSEXC)) 252 txdma->dd_csr = DMACSR_RESET | DMACSR_CLRCOMPLETE; 253 break; 254 } 255 256 txs = er->txstat; 257 258 #if 01 259 DPRINTF(("en_put: done txstat=%x.\n", txs)); 260 #endif 261 262 #define EN_TXS_ERROR (EN_TXS_SHORTED | EN_TXS_UNDERFLOW | EN_TXS_PARERR) 263 if ((state & DMACSR_COMPLETE) == 0 || 264 (txs & EN_TXS_ERROR) != 0) { 265 errno = EIO; 266 return -1; 267 } 268 if ((txs & EN_TXS_COLLERR) == 0) 269 return len; /* success */ 270 } 271 272 errno = EIO; /* too many retries */ 273 return -1; 274 } 275 276 int 277 en_get(struct iodesc *desc, void *pkt, size_t len, time_t timeout) 278 { 279 volatile struct en_regs *er; 280 volatile struct dma_dev *rxdma; 281 volatile struct dma_dev *txdma; 282 int state, rxs; 283 size_t rlen; 284 char *gotpkt; 285 286 rxdma = (struct dma_dev *)P_ENETR_CSR; 287 txdma = (struct dma_dev *)P_ENETX_CSR; 288 er = (struct en_regs *)P_ENET; 289 290 DPRINTF(("en_get: rxdma->dd_csr = %x\n",rxdma->dd_csr)); 291 292 er->rxstat = 0xff; 293 294 /* this is mouse's code now ... still doesn't work :( */ 295 /* The previous comment is now a lie, this does work 296 * Darrin B Jewell <jewell@mit.edu> Sat Jan 24 21:44:56 1998 297 */ 298 299 rxdma->dd_csr = 0; 300 rxdma->dd_csr = (turbo ? DMACSR_INITBUFTURBO : DMACSR_INITBUF) | 301 DMACSR_READ | DMACSR_RESET; 302 303 if (!turbo) { 304 rxdma->dd_saved_next = 0; 305 rxdma->dd_saved_limit = 0; 306 rxdma->dd_saved_start = 0; 307 rxdma->dd_saved_stop = 0; 308 } else { 309 rxdma->dd_saved_next = dma_buffers[0]; 310 } 311 312 rxdma->dd_next = dma_buffers[0]; 313 rxdma->dd_limit = DMA_ENDALIGN(char *, dma_buffers[0]+MAX_DMASIZE); 314 #if 0 315 if (turbo) { 316 /* !!! not a typo: txdma */ 317 txdma->dd_stop = dma_buffers[0]; 318 } 319 #endif 320 rxdma->dd_start = 0; 321 rxdma->dd_stop = 0; 322 rxdma->dd_csr = DMACSR_SETENABLE | DMACSR_READ; 323 if (turbo) 324 er->rxmode = EN_RMD_TEST | EN_RMD_RECV_NORMAL; 325 else 326 er->rxmode = EN_RMD_RECV_NORMAL; 327 328 #if 01 329 DPRINTF(("en_get: blocking on rcv dma\n")); 330 #endif 331 332 while(1) { 333 if (en_wait_for_intr(ENETR_DMA_INTR)) /* ### use timeout? */ 334 return 0; 335 336 state = rxdma->dd_csr & 337 (DMACSR_BUSEXC | DMACSR_COMPLETE 338 | DMACSR_SUPDATE | DMACSR_ENABLE); 339 DPRINTF(("en_get: dma state = 0x%x.\n", state)); 340 if ((state & DMACSR_ENABLE) == 0) { 341 rxdma->dd_csr = DMACSR_RESET | DMACSR_CLRCOMPLETE; 342 break; 343 } 344 345 if (state & DMACSR_COMPLETE) { 346 PRINTF(("en_get: ending dma sequence\n")); 347 rxdma->dd_csr = DMACSR_CLRCOMPLETE; 348 } 349 350 } 351 352 rxs = er->rxstat; 353 354 if ((state & DMACSR_COMPLETE) == 0 || 355 (rxs & EN_RX_OK) == 0) { 356 errno = EIO; 357 return -1; /* receive failed */ 358 } 359 360 if (turbo) { 361 gotpkt = rxdma->dd_saved_next; 362 rlen = rxdma->dd_next - rxdma->dd_saved_next; 363 } else { 364 gotpkt = rxdma->dd_saved_next; 365 rlen = rxdma->dd_next - rxdma->dd_saved_next; 366 } 367 368 if (gotpkt != dma_buffers[0]) { 369 printf("Unexpected received packet location\n"); 370 printf("DEBUG: rxstat=%x.\n", rxs); 371 printf("DEBUG: gotpkt = 0x%lx, rlen = %d, len = %d\n",(u_long)gotpkt,rlen,len); 372 printf("DEBUG: rxdma->dd_csr = 0x%lx\n",(u_long)rxdma->dd_csr); 373 printf("DEBUG: rxdma->dd_saved_next = 0x%lx\n",(u_long)rxdma->dd_saved_next); 374 printf("DEBUG: rxdma->dd_saved_limit = 0x%lx\n",(u_long)rxdma->dd_saved_limit); 375 printf("DEBUG: rxdma->dd_saved_start = 0x%lx\n",(u_long)rxdma->dd_saved_start); 376 printf("DEBUG: rxdma->dd_saved_stop = 0x%lx\n",(u_long)rxdma->dd_saved_stop); 377 printf("DEBUG: rxdma->dd_next = 0x%lx\n",(u_long)rxdma->dd_next); 378 printf("DEBUG: rxdma->dd_limit = 0x%lx\n",(u_long)rxdma->dd_limit); 379 printf("DEBUG: rxdma->dd_start = 0x%lx\n",(u_long)rxdma->dd_start); 380 printf("DEBUG: rxdma->dd_stop = 0x%lx\n",(u_long)rxdma->dd_stop); 381 printf("DEBUG: rxdma->dd_next_initbuf = 0x%lx\n",(u_long)rxdma->dd_next_initbuf); 382 } 383 384 #if 0 385 dump_pkt(gotpkt, rlen < 255 ? rlen : 128); 386 #endif 387 388 DPRINTF(("en_get: done rxstat=%x.\n", rxs)); 389 390 if (rlen > len) { 391 DPRINTF(("en_get: buffer too small. want %d, got %d\n", 392 len, rlen)); 393 rlen = len; 394 } 395 396 397 bcopy(gotpkt, pkt, rlen); 398 399 #if 0 400 printf("DEBUG: gotpkt = 0x%lx, pkt = 0x%lx, rlen = %d\n", 401 (u_long)gotpkt,(u_long)pkt,rlen); 402 dump_pkt(gotpkt, rlen < 255 ? rlen : 128); 403 dump_pkt(pkt, rlen < 255 ? rlen : 128); 404 #endif 405 406 return rlen; 407 } 408 409 410 void 411 en_end(struct netif *a) 412 { 413 DPRINTF(("en_end: WARNING not doing anything\n")); 414 } 415 416 #if 0 417 418 #define MKPANIC(ret,name,args) \ 419 ret name args { panic(#name ## ": not implemented.\n"); } 420 421 MKPANIC(void, en_end, (struct netif *a)); 422 423 /* device functions */ 424 425 int 426 enopen(struct open_file *f, char count, char lun, char part) 427 { 428 int error; 429 430 DPRINTF(("open: en(%d,%d,%d)\n", count, lun, part)); 431 432 if (count != 0 || lun != 0 || part != 0) 433 return EUNIT; /* there can be exactly one ethernet */ 434 435 if (open_count == 0) { 436 /* Find network interface. */ 437 if ((netdev_sock = netif_open(NULL)) < 0) 438 return errno; 439 if ((error = mountroot(netdev_sock)) != 0) { 440 if (open_count == 0) 441 netif_close(netdev_sock); 442 return error; 443 } 444 } 445 open_count++; 446 f->f_devdata = NULL; /* ### nfs_root_node ?! */ 447 return 0; 448 } 449 450 int 451 enclose(struct open_file *f) 452 { 453 if (open_count > 0) 454 if (--open_count == 0) 455 netif_close(netdev_sock); 456 f->f_devdata = NULL; 457 return 0; 458 } 459 460 int 461 enstrategy(void *devdata, int rw, daddr_t dblk, 462 size_t size, void *buf, size_t *rsize) 463 { 464 return ENXIO; /* wrong access method */ 465 } 466 467 /* private function */ 468 469 static int 470 mountroot(int sock) 471 { 472 /* Mount the root directory from a boot server */ 473 #if 0 474 struct in_addr in = { 475 0xc2793418 476 }; 477 u_char *res; 478 479 res = arpwhohas(socktodesc(sock), in); 480 panic("arpwhohas returned %s", res); 481 #endif 482 /* 1. use bootp. This does most of the work for us. */ 483 bootp(sock); 484 485 if (myip.s_addr == 0 || rootip.s_addr == 0 || rootpath[0] == '\0') 486 return ETIMEDOUT; 487 488 printf("Using IP address: %s\n", inet_ntoa(myip)); 489 printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); 490 491 /* 2. mount. */ 492 if (nfs_mount(sock, rootip, rootpath) < 0) 493 return errno; 494 495 return 0; 496 } 497 #endif 498 499 static int 500 en_wait_for_intr(int flag) 501 { 502 volatile int *intrstat = MON(volatile int *,MG_intrstat); 503 504 int count; 505 506 for(count = 0; count < EN_TIMEOUT; count++) 507 if (*intrstat & flag) 508 return 0; 509 510 return -1; 511 } 512