1 /* 2 * MPC8560 FCC Fast Ethernet 3 * Copyright (c) 2003 Motorola,Inc. 4 * Xianghua Xiao, (X.Xiao@motorola.com) 5 * 6 * Copyright (c) 2000 MontaVista Software, Inc. Dan Malek (dmalek@jlc.net) 7 * 8 * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com> 9 * Marius Groeger <mgroeger@sysgo.de> 10 * 11 * See file CREDITS for list of people who contributed to this 12 * project. 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License as 16 * published by the Free Software Foundation; either version 2 of 17 * the License, or (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 27 * MA 02111-1307 USA 28 */ 29 30 /* 31 * MPC8560 FCC Fast Ethernet 32 * Basic ET HW initialization and packet RX/TX routines 33 * 34 * This code will not perform the IO port configuration. This should be 35 * done in the iop_conf_t structure specific for the board. 36 * 37 * TODO: 38 * add a PHY driver to do the negotiation 39 * reflect negotiation results in FPSMR 40 * look for ways to configure the board specific stuff elsewhere, eg. 41 * config_xxx.h or the board directory 42 */ 43 44 #include <common.h> 45 #include <malloc.h> 46 #include <asm/cpm_85xx.h> 47 #include <command.h> 48 #include <config.h> 49 #include <net.h> 50 51 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) 52 #include <miiphy.h> 53 #endif 54 55 #if defined(CONFIG_ETHER_ON_FCC) && defined(CONFIG_CMD_NET) 56 57 static struct ether_fcc_info_s 58 { 59 int ether_index; 60 int proff_enet; 61 ulong cpm_cr_enet_sblock; 62 ulong cpm_cr_enet_page; 63 ulong cmxfcr_mask; 64 ulong cmxfcr_value; 65 } 66 ether_fcc_info[] = 67 { 68 #ifdef CONFIG_ETHER_ON_FCC1 69 { 70 0, 71 PROFF_FCC1, 72 CPM_CR_FCC1_SBLOCK, 73 CPM_CR_FCC1_PAGE, 74 CONFIG_SYS_CMXFCR_MASK1, 75 CONFIG_SYS_CMXFCR_VALUE1 76 }, 77 #endif 78 79 #ifdef CONFIG_ETHER_ON_FCC2 80 { 81 1, 82 PROFF_FCC2, 83 CPM_CR_FCC2_SBLOCK, 84 CPM_CR_FCC2_PAGE, 85 CONFIG_SYS_CMXFCR_MASK2, 86 CONFIG_SYS_CMXFCR_VALUE2 87 }, 88 #endif 89 90 #ifdef CONFIG_ETHER_ON_FCC3 91 { 92 2, 93 PROFF_FCC3, 94 CPM_CR_FCC3_SBLOCK, 95 CPM_CR_FCC3_PAGE, 96 CONFIG_SYS_CMXFCR_MASK3, 97 CONFIG_SYS_CMXFCR_VALUE3 98 }, 99 #endif 100 }; 101 102 /*---------------------------------------------------------------------*/ 103 104 /* Maximum input DMA size. Must be a should(?) be a multiple of 4. */ 105 #define PKT_MAXDMA_SIZE 1520 106 107 /* The FCC stores dest/src/type, data, and checksum for receive packets. */ 108 #define PKT_MAXBUF_SIZE 1518 109 #define PKT_MINBUF_SIZE 64 110 111 /* Maximum input buffer size. Must be a multiple of 32. */ 112 #define PKT_MAXBLR_SIZE 1536 113 114 #define TOUT_LOOP 1000000 115 116 #define TX_BUF_CNT 2 117 118 static uint rxIdx; /* index of the current RX buffer */ 119 static uint txIdx; /* index of the current TX buffer */ 120 121 /* 122 * FCC Ethernet Tx and Rx buffer descriptors. 123 * Provide for Double Buffering 124 * Note: PKTBUFSRX is defined in net.h 125 */ 126 127 typedef volatile struct rtxbd { 128 cbd_t rxbd[PKTBUFSRX]; 129 cbd_t txbd[TX_BUF_CNT]; 130 } RTXBD; 131 132 /* Good news: the FCC supports external BDs! */ 133 #ifdef __GNUC__ 134 static RTXBD rtx __attribute__ ((aligned(8))); 135 #else 136 #error "rtx must be 64-bit aligned" 137 #endif 138 139 #undef ET_DEBUG 140 141 static int fec_send(struct eth_device *dev, void *packet, int length) 142 { 143 int i = 0; 144 int result = 0; 145 146 if (length <= 0) { 147 printf("fec: bad packet size: %d\n", length); 148 goto out; 149 } 150 151 for(i=0; rtx.txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) { 152 if (i >= TOUT_LOOP) { 153 printf("fec: tx buffer not ready\n"); 154 goto out; 155 } 156 } 157 158 rtx.txbd[txIdx].cbd_bufaddr = (uint)packet; 159 rtx.txbd[txIdx].cbd_datlen = length; 160 rtx.txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST | \ 161 BD_ENET_TX_TC | BD_ENET_TX_PAD); 162 163 for(i=0; rtx.txbd[txIdx].cbd_sc & BD_ENET_TX_READY; i++) { 164 if (i >= TOUT_LOOP) { 165 printf("fec: tx error\n"); 166 goto out; 167 } 168 } 169 170 #ifdef ET_DEBUG 171 printf("cycles: 0x%x txIdx=0x%04x status: 0x%04x\n", i, txIdx,rtx.txbd[txIdx].cbd_sc); 172 printf("packets at 0x%08x, length_in_bytes=0x%x\n",(uint)packet,length); 173 for(i=0;i<(length/16 + 1);i++) { 174 printf("%08x %08x %08x %08x\n",*((uint *)rtx.txbd[txIdx].cbd_bufaddr+i*4),\ 175 *((uint *)rtx.txbd[txIdx].cbd_bufaddr + i*4 + 1),*((uint *)rtx.txbd[txIdx].cbd_bufaddr + i*4 + 2), \ 176 *((uint *)rtx.txbd[txIdx].cbd_bufaddr + i*4 + 3)); 177 } 178 #endif 179 180 /* return only status bits */ 181 result = rtx.txbd[txIdx].cbd_sc & BD_ENET_TX_STATS; 182 txIdx = (txIdx + 1) % TX_BUF_CNT; 183 184 out: 185 return result; 186 } 187 188 static int fec_recv(struct eth_device* dev) 189 { 190 int length; 191 192 for (;;) 193 { 194 if (rtx.rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) { 195 length = -1; 196 break; /* nothing received - leave for() loop */ 197 } 198 length = rtx.rxbd[rxIdx].cbd_datlen; 199 200 if (rtx.rxbd[rxIdx].cbd_sc & 0x003f) { 201 printf("fec: rx error %04x\n", rtx.rxbd[rxIdx].cbd_sc); 202 } 203 else { 204 /* Pass the packet up to the protocol layers. */ 205 NetReceive(NetRxPackets[rxIdx], length - 4); 206 } 207 208 209 /* Give the buffer back to the FCC. */ 210 rtx.rxbd[rxIdx].cbd_datlen = 0; 211 212 /* wrap around buffer index when necessary */ 213 if ((rxIdx + 1) >= PKTBUFSRX) { 214 rtx.rxbd[PKTBUFSRX - 1].cbd_sc = (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY); 215 rxIdx = 0; 216 } 217 else { 218 rtx.rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY; 219 rxIdx++; 220 } 221 } 222 return length; 223 } 224 225 226 static int fec_init(struct eth_device* dev, bd_t *bis) 227 { 228 struct ether_fcc_info_s * info = dev->priv; 229 int i; 230 volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CONFIG_SYS_MPC85xx_CPM_ADDR; 231 volatile ccsr_cpm_cp_t *cp = &(cpm->im_cpm_cp); 232 fcc_enet_t *pram_ptr; 233 unsigned long mem_addr; 234 235 #if 0 236 mii_discover_phy(); 237 #endif 238 239 /* 28.9 - (1-2): ioports have been set up already */ 240 241 /* 28.9 - (3): connect FCC's tx and rx clocks */ 242 cpm->im_cpm_mux.cmxuar = 0; /* ATM */ 243 cpm->im_cpm_mux.cmxfcr = (cpm->im_cpm_mux.cmxfcr & ~info->cmxfcr_mask) | 244 info->cmxfcr_value; 245 246 /* 28.9 - (4): GFMR: disable tx/rx, CCITT CRC, set Mode Ethernet */ 247 if(info->ether_index == 0) { 248 cpm->im_cpm_fcc1.gfmr = FCC_GFMR_MODE_ENET | FCC_GFMR_TCRC_32; 249 } else if (info->ether_index == 1) { 250 cpm->im_cpm_fcc2.gfmr = FCC_GFMR_MODE_ENET | FCC_GFMR_TCRC_32; 251 } else if (info->ether_index == 2) { 252 cpm->im_cpm_fcc3.gfmr = FCC_GFMR_MODE_ENET | FCC_GFMR_TCRC_32; 253 } 254 255 /* 28.9 - (5): FPSMR: enable full duplex, select CCITT CRC for Ethernet,MII */ 256 if(info->ether_index == 0) { 257 cpm->im_cpm_fcc1.fpsmr = CONFIG_SYS_FCC_PSMR | FCC_PSMR_ENCRC; 258 } else if (info->ether_index == 1){ 259 cpm->im_cpm_fcc2.fpsmr = CONFIG_SYS_FCC_PSMR | FCC_PSMR_ENCRC; 260 } else if (info->ether_index == 2){ 261 cpm->im_cpm_fcc3.fpsmr = CONFIG_SYS_FCC_PSMR | FCC_PSMR_ENCRC; 262 } 263 264 /* 28.9 - (6): FDSR: Ethernet Syn */ 265 if(info->ether_index == 0) { 266 cpm->im_cpm_fcc1.fdsr = 0xD555; 267 } else if (info->ether_index == 1) { 268 cpm->im_cpm_fcc2.fdsr = 0xD555; 269 } else if (info->ether_index == 2) { 270 cpm->im_cpm_fcc3.fdsr = 0xD555; 271 } 272 273 /* reset indeces to current rx/tx bd (see eth_send()/eth_rx()) */ 274 rxIdx = 0; 275 txIdx = 0; 276 277 /* Setup Receiver Buffer Descriptors */ 278 for (i = 0; i < PKTBUFSRX; i++) 279 { 280 rtx.rxbd[i].cbd_sc = BD_ENET_RX_EMPTY; 281 rtx.rxbd[i].cbd_datlen = 0; 282 rtx.rxbd[i].cbd_bufaddr = (uint)NetRxPackets[i]; 283 } 284 rtx.rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP; 285 286 /* Setup Ethernet Transmitter Buffer Descriptors */ 287 for (i = 0; i < TX_BUF_CNT; i++) 288 { 289 rtx.txbd[i].cbd_sc = 0; 290 rtx.txbd[i].cbd_datlen = 0; 291 rtx.txbd[i].cbd_bufaddr = 0; 292 } 293 rtx.txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP; 294 295 /* 28.9 - (7): initialize parameter ram */ 296 pram_ptr = (fcc_enet_t *)&(cpm->im_dprambase[info->proff_enet]); 297 298 /* clear whole structure to make sure all reserved fields are zero */ 299 memset((void*)pram_ptr, 0, sizeof(fcc_enet_t)); 300 301 /* 302 * common Parameter RAM area 303 * 304 * Allocate space in the reserved FCC area of DPRAM for the 305 * internal buffers. No one uses this space (yet), so we 306 * can do this. Later, we will add resource management for 307 * this area. 308 * CPM_FCC_SPECIAL_BASE: 0xB000 for MPC8540, MPC8560 309 * 0x9000 for MPC8541, MPC8555 310 */ 311 mem_addr = CPM_FCC_SPECIAL_BASE + ((info->ether_index) * 64); 312 pram_ptr->fen_genfcc.fcc_riptr = mem_addr; 313 pram_ptr->fen_genfcc.fcc_tiptr = mem_addr+32; 314 /* 315 * Set maximum bytes per receive buffer. 316 * It must be a multiple of 32. 317 */ 318 pram_ptr->fen_genfcc.fcc_mrblr = PKT_MAXBLR_SIZE; /* 1536 */ 319 /* localbus SDRAM should be preferred */ 320 pram_ptr->fen_genfcc.fcc_rstate = (CPMFCR_GBL | CPMFCR_EB | 321 CONFIG_SYS_CPMFCR_RAMTYPE) << 24; 322 pram_ptr->fen_genfcc.fcc_rbase = (unsigned int)(&rtx.rxbd[rxIdx]); 323 pram_ptr->fen_genfcc.fcc_rbdstat = 0; 324 pram_ptr->fen_genfcc.fcc_rbdlen = 0; 325 pram_ptr->fen_genfcc.fcc_rdptr = 0; 326 /* localbus SDRAM should be preferred */ 327 pram_ptr->fen_genfcc.fcc_tstate = (CPMFCR_GBL | CPMFCR_EB | 328 CONFIG_SYS_CPMFCR_RAMTYPE) << 24; 329 pram_ptr->fen_genfcc.fcc_tbase = (unsigned int)(&rtx.txbd[txIdx]); 330 pram_ptr->fen_genfcc.fcc_tbdstat = 0; 331 pram_ptr->fen_genfcc.fcc_tbdlen = 0; 332 pram_ptr->fen_genfcc.fcc_tdptr = 0; 333 334 /* protocol-specific area */ 335 pram_ptr->fen_statbuf = 0x0; 336 pram_ptr->fen_cmask = 0xdebb20e3; /* CRC mask */ 337 pram_ptr->fen_cpres = 0xffffffff; /* CRC preset */ 338 pram_ptr->fen_crcec = 0; 339 pram_ptr->fen_alec = 0; 340 pram_ptr->fen_disfc = 0; 341 pram_ptr->fen_retlim = 15; /* Retry limit threshold */ 342 pram_ptr->fen_retcnt = 0; 343 pram_ptr->fen_pper = 0; 344 pram_ptr->fen_boffcnt = 0; 345 pram_ptr->fen_gaddrh = 0; 346 pram_ptr->fen_gaddrl = 0; 347 pram_ptr->fen_mflr = PKT_MAXBUF_SIZE; /* maximum frame length register */ 348 /* 349 * Set Ethernet station address. 350 * 351 * This is supplied in the board information structure, so we 352 * copy that into the controller. 353 * So far we have only been given one Ethernet address. We make 354 * it unique by setting a few bits in the upper byte of the 355 * non-static part of the address. 356 */ 357 #define ea eth_get_dev()->enetaddr 358 pram_ptr->fen_paddrh = (ea[5] << 8) + ea[4]; 359 pram_ptr->fen_paddrm = (ea[3] << 8) + ea[2]; 360 pram_ptr->fen_paddrl = (ea[1] << 8) + ea[0]; 361 #undef ea 362 pram_ptr->fen_ibdcount = 0; 363 pram_ptr->fen_ibdstart = 0; 364 pram_ptr->fen_ibdend = 0; 365 pram_ptr->fen_txlen = 0; 366 pram_ptr->fen_iaddrh = 0; /* disable hash */ 367 pram_ptr->fen_iaddrl = 0; 368 pram_ptr->fen_minflr = PKT_MINBUF_SIZE; /* minimum frame length register: 64 */ 369 /* pad pointer. use tiptr since we don't need a specific padding char */ 370 pram_ptr->fen_padptr = pram_ptr->fen_genfcc.fcc_tiptr; 371 pram_ptr->fen_maxd1 = PKT_MAXDMA_SIZE; /* maximum DMA1 length:1520 */ 372 pram_ptr->fen_maxd2 = PKT_MAXDMA_SIZE; /* maximum DMA2 length:1520 */ 373 374 #if defined(ET_DEBUG) 375 printf("parm_ptr(0xff788500) = %p\n",pram_ptr); 376 printf("pram_ptr->fen_genfcc.fcc_rbase %08x\n", 377 pram_ptr->fen_genfcc.fcc_rbase); 378 printf("pram_ptr->fen_genfcc.fcc_tbase %08x\n", 379 pram_ptr->fen_genfcc.fcc_tbase); 380 #endif 381 382 /* 28.9 - (8)(9): clear out events in FCCE */ 383 /* 28.9 - (9): FCCM: mask all events */ 384 if(info->ether_index == 0) { 385 cpm->im_cpm_fcc1.fcce = ~0x0; 386 cpm->im_cpm_fcc1.fccm = 0; 387 } else if (info->ether_index == 1) { 388 cpm->im_cpm_fcc2.fcce = ~0x0; 389 cpm->im_cpm_fcc2.fccm = 0; 390 } else if (info->ether_index == 2) { 391 cpm->im_cpm_fcc3.fcce = ~0x0; 392 cpm->im_cpm_fcc3.fccm = 0; 393 } 394 395 /* 28.9 - (10-12): we don't use ethernet interrupts */ 396 397 /* 28.9 - (13) 398 * 399 * Let's re-initialize the channel now. We have to do it later 400 * than the manual describes because we have just now finished 401 * the BD initialization. 402 */ 403 cp->cpcr = mk_cr_cmd(info->cpm_cr_enet_page, 404 info->cpm_cr_enet_sblock, 405 0x0c, 406 CPM_CR_INIT_TRX) | CPM_CR_FLG; 407 do { 408 __asm__ __volatile__ ("eieio"); 409 } while (cp->cpcr & CPM_CR_FLG); 410 411 /* 28.9 - (14): enable tx/rx in gfmr */ 412 if(info->ether_index == 0) { 413 cpm->im_cpm_fcc1.gfmr |= FCC_GFMR_ENT | FCC_GFMR_ENR; 414 } else if (info->ether_index == 1) { 415 cpm->im_cpm_fcc2.gfmr |= FCC_GFMR_ENT | FCC_GFMR_ENR; 416 } else if (info->ether_index == 2) { 417 cpm->im_cpm_fcc3.gfmr |= FCC_GFMR_ENT | FCC_GFMR_ENR; 418 } 419 420 return 1; 421 } 422 423 static void fec_halt(struct eth_device* dev) 424 { 425 struct ether_fcc_info_s * info = dev->priv; 426 volatile ccsr_cpm_t *cpm = (ccsr_cpm_t *)CONFIG_SYS_MPC85xx_CPM_ADDR; 427 428 /* write GFMR: disable tx/rx */ 429 if(info->ether_index == 0) { 430 cpm->im_cpm_fcc1.gfmr &= ~(FCC_GFMR_ENT | FCC_GFMR_ENR); 431 } else if(info->ether_index == 1) { 432 cpm->im_cpm_fcc2.gfmr &= ~(FCC_GFMR_ENT | FCC_GFMR_ENR); 433 } else if(info->ether_index == 2) { 434 cpm->im_cpm_fcc3.gfmr &= ~(FCC_GFMR_ENT | FCC_GFMR_ENR); 435 } 436 } 437 438 int fec_initialize(bd_t *bis) 439 { 440 struct eth_device* dev; 441 int i; 442 443 for (i = 0; i < sizeof(ether_fcc_info) / sizeof(ether_fcc_info[0]); i++) 444 { 445 dev = (struct eth_device*) malloc(sizeof *dev); 446 memset(dev, 0, sizeof *dev); 447 448 sprintf(dev->name, "FCC%d", 449 ether_fcc_info[i].ether_index + 1); 450 dev->priv = ðer_fcc_info[i]; 451 dev->init = fec_init; 452 dev->halt = fec_halt; 453 dev->send = fec_send; 454 dev->recv = fec_recv; 455 456 eth_register(dev); 457 458 #if (defined(CONFIG_MII) || defined(CONFIG_CMD_MII)) \ 459 && defined(CONFIG_BITBANGMII) 460 miiphy_register(dev->name, 461 bb_miiphy_read, bb_miiphy_write); 462 #endif 463 } 464 465 return 1; 466 } 467 468 #endif 469