1 /* 2 * (C) Copyright 2007-2009 Michal Simek 3 * (C) Copyright 2003 Xilinx Inc. 4 * 5 * Michal SIMEK <monstr@monstr.eu> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <net.h> 12 #include <config.h> 13 #include <console.h> 14 #include <malloc.h> 15 #include <asm/io.h> 16 #include <phy.h> 17 #include <miiphy.h> 18 #include <fdtdec.h> 19 #include <asm-generic/errno.h> 20 21 #undef DEBUG 22 23 #define ENET_ADDR_LENGTH 6 24 25 /* EmacLite constants */ 26 #define XEL_BUFFER_OFFSET 0x0800 /* Next buffer's offset */ 27 #define XEL_TPLR_OFFSET 0x07F4 /* Tx packet length */ 28 #define XEL_TSR_OFFSET 0x07FC /* Tx status */ 29 #define XEL_RSR_OFFSET 0x17FC /* Rx status */ 30 #define XEL_RXBUFF_OFFSET 0x1000 /* Receive Buffer */ 31 32 /* Xmit complete */ 33 #define XEL_TSR_XMIT_BUSY_MASK 0x00000001UL 34 /* Xmit interrupt enable bit */ 35 #define XEL_TSR_XMIT_IE_MASK 0x00000008UL 36 /* Buffer is active, SW bit only */ 37 #define XEL_TSR_XMIT_ACTIVE_MASK 0x80000000UL 38 /* Program the MAC address */ 39 #define XEL_TSR_PROGRAM_MASK 0x00000002UL 40 /* define for programming the MAC address into the EMAC Lite */ 41 #define XEL_TSR_PROG_MAC_ADDR (XEL_TSR_XMIT_BUSY_MASK | XEL_TSR_PROGRAM_MASK) 42 43 /* Transmit packet length upper byte */ 44 #define XEL_TPLR_LENGTH_MASK_HI 0x0000FF00UL 45 /* Transmit packet length lower byte */ 46 #define XEL_TPLR_LENGTH_MASK_LO 0x000000FFUL 47 48 /* Recv complete */ 49 #define XEL_RSR_RECV_DONE_MASK 0x00000001UL 50 /* Recv interrupt enable bit */ 51 #define XEL_RSR_RECV_IE_MASK 0x00000008UL 52 53 /* MDIO Address Register Bit Masks */ 54 #define XEL_MDIOADDR_REGADR_MASK 0x0000001F /* Register Address */ 55 #define XEL_MDIOADDR_PHYADR_MASK 0x000003E0 /* PHY Address */ 56 #define XEL_MDIOADDR_PHYADR_SHIFT 5 57 #define XEL_MDIOADDR_OP_MASK 0x00000400 /* RD/WR Operation */ 58 59 /* MDIO Write Data Register Bit Masks */ 60 #define XEL_MDIOWR_WRDATA_MASK 0x0000FFFF /* Data to be Written */ 61 62 /* MDIO Read Data Register Bit Masks */ 63 #define XEL_MDIORD_RDDATA_MASK 0x0000FFFF /* Data to be Read */ 64 65 /* MDIO Control Register Bit Masks */ 66 #define XEL_MDIOCTRL_MDIOSTS_MASK 0x00000001 /* MDIO Status Mask */ 67 #define XEL_MDIOCTRL_MDIOEN_MASK 0x00000008 /* MDIO Enable */ 68 69 struct emaclite_regs { 70 u32 tx_ping; /* 0x0 - TX Ping buffer */ 71 u32 reserved1[504]; 72 u32 mdioaddr; /* 0x7e4 - MDIO Address Register */ 73 u32 mdiowr; /* 0x7e8 - MDIO Write Data Register */ 74 u32 mdiord;/* 0x7ec - MDIO Read Data Register */ 75 u32 mdioctrl; /* 0x7f0 - MDIO Control Register */ 76 u32 tx_ping_tplr; /* 0x7f4 - Tx packet length */ 77 u32 global_interrupt; /* 0x7f8 - Global interrupt enable */ 78 u32 tx_ping_tsr; /* 0x7fc - Tx status */ 79 u32 tx_pong; /* 0x800 - TX Pong buffer */ 80 u32 reserved2[508]; 81 u32 tx_pong_tplr; /* 0xff4 - Tx packet length */ 82 u32 reserved3; /* 0xff8 */ 83 u32 tx_pong_tsr; /* 0xffc - Tx status */ 84 u32 rx_ping; /* 0x1000 - Receive Buffer */ 85 u32 reserved4[510]; 86 u32 rx_ping_rsr; /* 0x17fc - Rx status */ 87 u32 rx_pong; /* 0x1800 - Receive Buffer */ 88 u32 reserved5[510]; 89 u32 rx_pong_rsr; /* 0x1ffc - Rx status */ 90 }; 91 92 struct xemaclite { 93 u32 nexttxbuffertouse; /* Next TX buffer to write to */ 94 u32 nextrxbuffertouse; /* Next RX buffer to read from */ 95 u32 txpp; /* TX ping pong buffer */ 96 u32 rxpp; /* RX ping pong buffer */ 97 int phyaddr; 98 struct emaclite_regs *regs; 99 struct phy_device *phydev; 100 struct mii_dev *bus; 101 }; 102 103 static u32 etherrxbuff[PKTSIZE_ALIGN/4]; /* Receive buffer */ 104 105 static void xemaclite_alignedread(u32 *srcptr, void *destptr, u32 bytecount) 106 { 107 u32 i; 108 u32 alignbuffer; 109 u32 *to32ptr; 110 u32 *from32ptr; 111 u8 *to8ptr; 112 u8 *from8ptr; 113 114 from32ptr = (u32 *) srcptr; 115 116 /* Word aligned buffer, no correction needed. */ 117 to32ptr = (u32 *) destptr; 118 while (bytecount > 3) { 119 *to32ptr++ = *from32ptr++; 120 bytecount -= 4; 121 } 122 to8ptr = (u8 *) to32ptr; 123 124 alignbuffer = *from32ptr++; 125 from8ptr = (u8 *) &alignbuffer; 126 127 for (i = 0; i < bytecount; i++) 128 *to8ptr++ = *from8ptr++; 129 } 130 131 static void xemaclite_alignedwrite(void *srcptr, u32 destptr, u32 bytecount) 132 { 133 u32 i; 134 u32 alignbuffer; 135 u32 *to32ptr = (u32 *) destptr; 136 u32 *from32ptr; 137 u8 *to8ptr; 138 u8 *from8ptr; 139 140 from32ptr = (u32 *) srcptr; 141 while (bytecount > 3) { 142 143 *to32ptr++ = *from32ptr++; 144 bytecount -= 4; 145 } 146 147 alignbuffer = 0; 148 to8ptr = (u8 *) &alignbuffer; 149 from8ptr = (u8 *) from32ptr; 150 151 for (i = 0; i < bytecount; i++) 152 *to8ptr++ = *from8ptr++; 153 154 *to32ptr++ = alignbuffer; 155 } 156 157 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB) 158 static int wait_for_bit(const char *func, u32 *reg, const u32 mask, 159 bool set, unsigned int timeout) 160 { 161 u32 val; 162 unsigned long start = get_timer(0); 163 164 while (1) { 165 val = readl(reg); 166 167 if (!set) 168 val = ~val; 169 170 if ((val & mask) == mask) 171 return 0; 172 173 if (get_timer(start) > timeout) 174 break; 175 176 if (ctrlc()) { 177 puts("Abort\n"); 178 return -EINTR; 179 } 180 181 udelay(1); 182 } 183 184 debug("%s: Timeout (reg=%p mask=%08x wait_set=%i)\n", 185 func, reg, mask, set); 186 187 return -ETIMEDOUT; 188 } 189 190 static int mdio_wait(struct emaclite_regs *regs) 191 { 192 return wait_for_bit(__func__, ®s->mdioctrl, 193 XEL_MDIOCTRL_MDIOSTS_MASK, false, 2000); 194 } 195 196 static u32 phyread(struct xemaclite *emaclite, u32 phyaddress, u32 registernum, 197 u16 *data) 198 { 199 struct emaclite_regs *regs = emaclite->regs; 200 201 if (mdio_wait(regs)) 202 return 1; 203 204 u32 ctrl_reg = in_be32(®s->mdioctrl); 205 out_be32(®s->mdioaddr, XEL_MDIOADDR_OP_MASK | 206 ((phyaddress << XEL_MDIOADDR_PHYADR_SHIFT) | registernum)); 207 out_be32(®s->mdioctrl, ctrl_reg | XEL_MDIOCTRL_MDIOSTS_MASK); 208 209 if (mdio_wait(regs)) 210 return 1; 211 212 /* Read data */ 213 *data = in_be32(®s->mdiord); 214 return 0; 215 } 216 217 static u32 phywrite(struct xemaclite *emaclite, u32 phyaddress, u32 registernum, 218 u16 data) 219 { 220 struct emaclite_regs *regs = emaclite->regs; 221 222 if (mdio_wait(regs)) 223 return 1; 224 225 /* 226 * Write the PHY address, register number and clear the OP bit in the 227 * MDIO Address register and then write the value into the MDIO Write 228 * Data register. Finally, set the Status bit in the MDIO Control 229 * register to start a MDIO write transaction. 230 */ 231 u32 ctrl_reg = in_be32(®s->mdioctrl); 232 out_be32(®s->mdioaddr, ~XEL_MDIOADDR_OP_MASK & 233 ((phyaddress << XEL_MDIOADDR_PHYADR_SHIFT) | registernum)); 234 out_be32(®s->mdiowr, data); 235 out_be32(®s->mdioctrl, ctrl_reg | XEL_MDIOCTRL_MDIOSTS_MASK); 236 237 if (mdio_wait(regs)) 238 return 1; 239 240 return 0; 241 } 242 #endif 243 244 static void emaclite_halt(struct eth_device *dev) 245 { 246 debug("eth_halt\n"); 247 } 248 249 /* Use MII register 1 (MII status register) to detect PHY */ 250 #define PHY_DETECT_REG 1 251 252 /* Mask used to verify certain PHY features (or register contents) 253 * in the register above: 254 * 0x1000: 10Mbps full duplex support 255 * 0x0800: 10Mbps half duplex support 256 * 0x0008: Auto-negotiation support 257 */ 258 #define PHY_DETECT_MASK 0x1808 259 260 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB) 261 static int setup_phy(struct eth_device *dev) 262 { 263 int i; 264 u16 phyreg; 265 struct xemaclite *emaclite = dev->priv; 266 struct phy_device *phydev; 267 268 u32 supported = SUPPORTED_10baseT_Half | 269 SUPPORTED_10baseT_Full | 270 SUPPORTED_100baseT_Half | 271 SUPPORTED_100baseT_Full; 272 273 if (emaclite->phyaddr != -1) { 274 phyread(emaclite, emaclite->phyaddr, PHY_DETECT_REG, &phyreg); 275 if ((phyreg != 0xFFFF) && 276 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { 277 /* Found a valid PHY address */ 278 debug("Default phy address %d is valid\n", 279 emaclite->phyaddr); 280 } else { 281 debug("PHY address is not setup correctly %d\n", 282 emaclite->phyaddr); 283 emaclite->phyaddr = -1; 284 } 285 } 286 287 if (emaclite->phyaddr == -1) { 288 /* detect the PHY address */ 289 for (i = 31; i >= 0; i--) { 290 phyread(emaclite, i, PHY_DETECT_REG, &phyreg); 291 if ((phyreg != 0xFFFF) && 292 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) { 293 /* Found a valid PHY address */ 294 emaclite->phyaddr = i; 295 debug("emaclite: Found valid phy address, %d\n", 296 i); 297 break; 298 } 299 } 300 } 301 302 /* interface - look at tsec */ 303 phydev = phy_connect(emaclite->bus, emaclite->phyaddr, dev, 304 PHY_INTERFACE_MODE_MII); 305 /* 306 * Phy can support 1000baseT but device NOT that's why phydev->supported 307 * must be setup for 1000baseT. phydev->advertising setups what speeds 308 * will be used for autonegotiation where 1000baseT must be disabled. 309 */ 310 phydev->supported = supported | SUPPORTED_1000baseT_Half | 311 SUPPORTED_1000baseT_Full; 312 phydev->advertising = supported; 313 emaclite->phydev = phydev; 314 phy_config(phydev); 315 phy_startup(phydev); 316 317 if (!phydev->link) { 318 printf("%s: No link.\n", phydev->dev->name); 319 return 0; 320 } 321 322 /* Do not setup anything */ 323 return 1; 324 } 325 #endif 326 327 static int emaclite_init(struct eth_device *dev, bd_t *bis) 328 { 329 struct xemaclite *emaclite = dev->priv; 330 struct emaclite_regs *regs = emaclite->regs; 331 332 debug("EmacLite Initialization Started\n"); 333 334 /* 335 * TX - TX_PING & TX_PONG initialization 336 */ 337 /* Restart PING TX */ 338 out_be32(®s->tx_ping_tsr, 0); 339 /* Copy MAC address */ 340 xemaclite_alignedwrite(dev->enetaddr, (u32)®s->tx_ping, 341 ENET_ADDR_LENGTH); 342 /* Set the length */ 343 out_be32(®s->tx_ping_tplr, ENET_ADDR_LENGTH); 344 /* Update the MAC address in the EMAC Lite */ 345 out_be32(®s->tx_ping_tsr, XEL_TSR_PROG_MAC_ADDR); 346 /* Wait for EMAC Lite to finish with the MAC address update */ 347 while ((in_be32 (®s->tx_ping_tsr) & 348 XEL_TSR_PROG_MAC_ADDR) != 0) 349 ; 350 351 if (emaclite->txpp) { 352 /* The same operation with PONG TX */ 353 out_be32(®s->tx_pong_tsr, 0); 354 xemaclite_alignedwrite(dev->enetaddr, (u32)®s->tx_pong, 355 ENET_ADDR_LENGTH); 356 out_be32(®s->tx_pong_tplr, ENET_ADDR_LENGTH); 357 out_be32(®s->tx_pong_tsr, XEL_TSR_PROG_MAC_ADDR); 358 while ((in_be32(®s->tx_pong_tsr) & 359 XEL_TSR_PROG_MAC_ADDR) != 0) 360 ; 361 } 362 363 /* 364 * RX - RX_PING & RX_PONG initialization 365 */ 366 /* Write out the value to flush the RX buffer */ 367 out_be32(®s->rx_ping_rsr, XEL_RSR_RECV_IE_MASK); 368 369 if (emaclite->rxpp) 370 out_be32(®s->rx_pong_rsr, XEL_RSR_RECV_IE_MASK); 371 372 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB) 373 out_be32(®s->mdioctrl, XEL_MDIOCTRL_MDIOEN_MASK); 374 if (in_be32(®s->mdioctrl) & XEL_MDIOCTRL_MDIOEN_MASK) 375 if (!setup_phy(dev)) 376 return -1; 377 #endif 378 debug("EmacLite Initialization complete\n"); 379 return 0; 380 } 381 382 static int xemaclite_txbufferavailable(struct xemaclite *emaclite) 383 { 384 u32 tmp; 385 struct emaclite_regs *regs = emaclite->regs; 386 387 /* 388 * Read the other buffer register 389 * and determine if the other buffer is available 390 */ 391 tmp = ~in_be32(®s->tx_ping_tsr); 392 if (emaclite->txpp) 393 tmp |= ~in_be32(®s->tx_pong_tsr); 394 395 return !(tmp & XEL_TSR_XMIT_BUSY_MASK); 396 } 397 398 static int emaclite_send(struct eth_device *dev, void *ptr, int len) 399 { 400 u32 reg; 401 u32 baseaddress; 402 struct xemaclite *emaclite = dev->priv; 403 struct emaclite_regs *regs = emaclite->regs; 404 405 u32 maxtry = 1000; 406 407 if (len > PKTSIZE) 408 len = PKTSIZE; 409 410 while (xemaclite_txbufferavailable(emaclite) && maxtry) { 411 udelay(10); 412 maxtry--; 413 } 414 415 if (!maxtry) { 416 printf("Error: Timeout waiting for ethernet TX buffer\n"); 417 /* Restart PING TX */ 418 out_be32(®s->tx_ping_tsr, 0); 419 if (emaclite->txpp) { 420 out_be32(®s->tx_pong_tsr, 0); 421 } 422 return -1; 423 } 424 425 /* Determine the expected TX buffer address */ 426 baseaddress = (dev->iobase + emaclite->nexttxbuffertouse); 427 428 /* Determine if the expected buffer address is empty */ 429 reg = in_be32 (baseaddress + XEL_TSR_OFFSET); 430 if (((reg & XEL_TSR_XMIT_BUSY_MASK) == 0) 431 && ((in_be32 ((baseaddress) + XEL_TSR_OFFSET) 432 & XEL_TSR_XMIT_ACTIVE_MASK) == 0)) { 433 434 if (emaclite->txpp) 435 emaclite->nexttxbuffertouse ^= XEL_BUFFER_OFFSET; 436 437 debug("Send packet from 0x%x\n", baseaddress); 438 /* Write the frame to the buffer */ 439 xemaclite_alignedwrite(ptr, baseaddress, len); 440 out_be32 (baseaddress + XEL_TPLR_OFFSET,(len & 441 (XEL_TPLR_LENGTH_MASK_HI | XEL_TPLR_LENGTH_MASK_LO))); 442 reg = in_be32 (baseaddress + XEL_TSR_OFFSET); 443 reg |= XEL_TSR_XMIT_BUSY_MASK; 444 if ((reg & XEL_TSR_XMIT_IE_MASK) != 0) 445 reg |= XEL_TSR_XMIT_ACTIVE_MASK; 446 out_be32 (baseaddress + XEL_TSR_OFFSET, reg); 447 return 0; 448 } 449 450 if (emaclite->txpp) { 451 /* Switch to second buffer */ 452 baseaddress ^= XEL_BUFFER_OFFSET; 453 /* Determine if the expected buffer address is empty */ 454 reg = in_be32 (baseaddress + XEL_TSR_OFFSET); 455 if (((reg & XEL_TSR_XMIT_BUSY_MASK) == 0) 456 && ((in_be32 ((baseaddress) + XEL_TSR_OFFSET) 457 & XEL_TSR_XMIT_ACTIVE_MASK) == 0)) { 458 debug("Send packet from 0x%x\n", baseaddress); 459 /* Write the frame to the buffer */ 460 xemaclite_alignedwrite(ptr, baseaddress, len); 461 out_be32 (baseaddress + XEL_TPLR_OFFSET, (len & 462 (XEL_TPLR_LENGTH_MASK_HI | 463 XEL_TPLR_LENGTH_MASK_LO))); 464 reg = in_be32 (baseaddress + XEL_TSR_OFFSET); 465 reg |= XEL_TSR_XMIT_BUSY_MASK; 466 if ((reg & XEL_TSR_XMIT_IE_MASK) != 0) 467 reg |= XEL_TSR_XMIT_ACTIVE_MASK; 468 out_be32 (baseaddress + XEL_TSR_OFFSET, reg); 469 return 0; 470 } 471 } 472 473 puts("Error while sending frame\n"); 474 return -1; 475 } 476 477 static int emaclite_recv(struct eth_device *dev) 478 { 479 u32 length; 480 u32 reg; 481 u32 baseaddress; 482 struct xemaclite *emaclite = dev->priv; 483 484 baseaddress = dev->iobase + emaclite->nextrxbuffertouse; 485 reg = in_be32 (baseaddress + XEL_RSR_OFFSET); 486 debug("Testing data at address 0x%x\n", baseaddress); 487 if ((reg & XEL_RSR_RECV_DONE_MASK) == XEL_RSR_RECV_DONE_MASK) { 488 if (emaclite->rxpp) 489 emaclite->nextrxbuffertouse ^= XEL_BUFFER_OFFSET; 490 } else { 491 492 if (!emaclite->rxpp) { 493 debug("No data was available - address 0x%x\n", 494 baseaddress); 495 return 0; 496 } else { 497 baseaddress ^= XEL_BUFFER_OFFSET; 498 reg = in_be32 (baseaddress + XEL_RSR_OFFSET); 499 if ((reg & XEL_RSR_RECV_DONE_MASK) != 500 XEL_RSR_RECV_DONE_MASK) { 501 debug("No data was available - address 0x%x\n", 502 baseaddress); 503 return 0; 504 } 505 } 506 } 507 /* Get the length of the frame that arrived */ 508 switch(((ntohl(in_be32 (baseaddress + XEL_RXBUFF_OFFSET + 0xC))) & 509 0xFFFF0000 ) >> 16) { 510 case 0x806: 511 length = 42 + 20; /* FIXME size of ARP */ 512 debug("ARP Packet\n"); 513 break; 514 case 0x800: 515 length = 14 + 14 + 516 (((ntohl(in_be32 (baseaddress + XEL_RXBUFF_OFFSET + 517 0x10))) & 0xFFFF0000) >> 16); 518 /* FIXME size of IP packet */ 519 debug ("IP Packet\n"); 520 break; 521 default: 522 debug("Other Packet\n"); 523 length = PKTSIZE; 524 break; 525 } 526 527 xemaclite_alignedread((u32 *) (baseaddress + XEL_RXBUFF_OFFSET), 528 etherrxbuff, length); 529 530 /* Acknowledge the frame */ 531 reg = in_be32 (baseaddress + XEL_RSR_OFFSET); 532 reg &= ~XEL_RSR_RECV_DONE_MASK; 533 out_be32 (baseaddress + XEL_RSR_OFFSET, reg); 534 535 debug("Packet receive from 0x%x, length %dB\n", baseaddress, length); 536 net_process_received_packet((uchar *)etherrxbuff, length); 537 return length; 538 539 } 540 541 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB) 542 static int emaclite_miiphy_read(const char *devname, uchar addr, 543 uchar reg, ushort *val) 544 { 545 u32 ret; 546 struct eth_device *dev = eth_get_dev(); 547 548 ret = phyread(dev->priv, addr, reg, val); 549 debug("emaclite: Read MII 0x%x, 0x%x, 0x%x\n", addr, reg, *val); 550 return ret; 551 } 552 553 static int emaclite_miiphy_write(const char *devname, uchar addr, 554 uchar reg, ushort val) 555 { 556 struct eth_device *dev = eth_get_dev(); 557 558 debug("emaclite: Write MII 0x%x, 0x%x, 0x%x\n", addr, reg, val); 559 return phywrite(dev->priv, addr, reg, val); 560 } 561 #endif 562 563 int xilinx_emaclite_initialize(bd_t *bis, unsigned long base_addr, 564 int txpp, int rxpp) 565 { 566 struct eth_device *dev; 567 struct xemaclite *emaclite; 568 struct emaclite_regs *regs; 569 570 dev = calloc(1, sizeof(*dev)); 571 if (dev == NULL) 572 return -1; 573 574 emaclite = calloc(1, sizeof(struct xemaclite)); 575 if (emaclite == NULL) { 576 free(dev); 577 return -1; 578 } 579 580 dev->priv = emaclite; 581 582 emaclite->txpp = txpp; 583 emaclite->rxpp = rxpp; 584 585 sprintf(dev->name, "Xelite.%lx", base_addr); 586 587 emaclite->regs = (struct emaclite_regs *)base_addr; 588 regs = emaclite->regs; 589 dev->iobase = base_addr; 590 dev->init = emaclite_init; 591 dev->halt = emaclite_halt; 592 dev->send = emaclite_send; 593 dev->recv = emaclite_recv; 594 595 #ifdef CONFIG_PHY_ADDR 596 emaclite->phyaddr = CONFIG_PHY_ADDR; 597 #else 598 emaclite->phyaddr = -1; 599 #endif 600 601 eth_register(dev); 602 603 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB) 604 miiphy_register(dev->name, emaclite_miiphy_read, emaclite_miiphy_write); 605 emaclite->bus = miiphy_get_dev_by_name(dev->name); 606 607 out_be32(®s->mdioctrl, XEL_MDIOCTRL_MDIOEN_MASK); 608 #endif 609 610 return 1; 611 } 612