1 /* 2 ns8382x.c: A U-Boot driver for the NatSemi DP8382[01]. 3 ported by: Mark A. Rakes (mark_rakes (at) vivato.net) 4 5 Adapted from: 6 1. an Etherboot driver for DP8381[56] written by: 7 Copyright (C) 2001 Entity Cyber, Inc. 8 9 This development of this Etherboot driver was funded by 10 Sicom Systems: http://www.sicompos.com/ 11 12 Author: Marty Connor (mdc (at) thinguin.org) 13 Adapted from a Linux driver which was written by Donald Becker 14 15 This software may be used and distributed according to the terms 16 of the GNU Public License (GPL), incorporated herein by reference. 17 18 2. A Linux driver by Donald Becker, ns820.c: 19 Written/copyright 1999-2002 by Donald Becker. 20 21 This software may be used and distributed according to the terms of 22 the GNU General Public License (GPL), incorporated herein by reference. 23 Drivers based on or derived from this code fall under the GPL and must 24 retain the authorship, copyright and license notice. This file is not 25 a complete program and may only be used when the entire operating 26 system is licensed under the GPL. License for under other terms may be 27 available. Contact the original author for details. 28 29 The original author may be reached as becker (at) scyld.com, or at 30 Scyld Computing Corporation 31 410 Severn Ave., Suite 210 32 Annapolis MD 21403 33 34 Support information and updates available at 35 http://www.scyld.com/network/netsemi.html 36 37 Datasheets available from: 38 http://www.national.com/pf/DP/DP83820.html 39 http://www.national.com/pf/DP/DP83821.html 40 */ 41 42 /* Revision History 43 * October 2002 mar 1.0 44 * Initial U-Boot Release. 45 * Tested with Netgear GA622T (83820) 46 * and SMC9452TX (83821) 47 * NOTE: custom boards with these chips may (likely) require 48 * a programmed EEPROM device (if present) in order to work 49 * correctly. 50 */ 51 52 /* Includes */ 53 #include <common.h> 54 #include <malloc.h> 55 #include <net.h> 56 #include <netdev.h> 57 #include <asm/io.h> 58 #include <pci.h> 59 60 /* defines */ 61 #define DSIZE 0x00000FFF 62 #define ETH_ALEN 6 63 #define CRC_SIZE 4 64 #define TOUT_LOOP 500000 65 #define TX_BUF_SIZE 1536 66 #define RX_BUF_SIZE 1536 67 #define NUM_RX_DESC 4 /* Number of Rx descriptor registers. */ 68 69 enum register_offsets { 70 ChipCmd = 0x00, 71 ChipConfig = 0x04, 72 EECtrl = 0x08, 73 IntrMask = 0x14, 74 IntrEnable = 0x18, 75 TxRingPtr = 0x20, 76 TxRingPtrHi = 0x24, 77 TxConfig = 0x28, 78 RxRingPtr = 0x30, 79 RxRingPtrHi = 0x34, 80 RxConfig = 0x38, 81 PriQueue = 0x3C, 82 RxFilterAddr = 0x48, 83 RxFilterData = 0x4C, 84 ClkRun = 0xCC, 85 PCIPM = 0x44, 86 }; 87 88 enum ChipCmdBits { 89 ChipReset = 0x100, 90 RxReset = 0x20, 91 TxReset = 0x10, 92 RxOff = 0x08, 93 RxOn = 0x04, 94 TxOff = 0x02, 95 TxOn = 0x01 96 }; 97 98 enum ChipConfigBits { 99 LinkSts = 0x80000000, 100 GigSpeed = 0x40000000, 101 HundSpeed = 0x20000000, 102 FullDuplex = 0x10000000, 103 TBIEn = 0x01000000, 104 Mode1000 = 0x00400000, 105 T64En = 0x00004000, 106 D64En = 0x00001000, 107 M64En = 0x00000800, 108 PhyRst = 0x00000400, 109 PhyDis = 0x00000200, 110 ExtStEn = 0x00000100, 111 BEMode = 0x00000001, 112 }; 113 #define SpeedStatus_Polarity ( GigSpeed | HundSpeed | FullDuplex) 114 115 enum TxConfig_bits { 116 TxDrthMask = 0x000000ff, 117 TxFlthMask = 0x0000ff00, 118 TxMxdmaMask = 0x00700000, 119 TxMxdma_8 = 0x00100000, 120 TxMxdma_16 = 0x00200000, 121 TxMxdma_32 = 0x00300000, 122 TxMxdma_64 = 0x00400000, 123 TxMxdma_128 = 0x00500000, 124 TxMxdma_256 = 0x00600000, 125 TxMxdma_512 = 0x00700000, 126 TxMxdma_1024 = 0x00000000, 127 TxCollRetry = 0x00800000, 128 TxAutoPad = 0x10000000, 129 TxMacLoop = 0x20000000, 130 TxHeartIgn = 0x40000000, 131 TxCarrierIgn = 0x80000000 132 }; 133 134 enum RxConfig_bits { 135 RxDrthMask = 0x0000003e, 136 RxMxdmaMask = 0x00700000, 137 RxMxdma_8 = 0x00100000, 138 RxMxdma_16 = 0x00200000, 139 RxMxdma_32 = 0x00300000, 140 RxMxdma_64 = 0x00400000, 141 RxMxdma_128 = 0x00500000, 142 RxMxdma_256 = 0x00600000, 143 RxMxdma_512 = 0x00700000, 144 RxMxdma_1024 = 0x00000000, 145 RxAcceptLenErr = 0x04000000, 146 RxAcceptLong = 0x08000000, 147 RxAcceptTx = 0x10000000, 148 RxStripCRC = 0x20000000, 149 RxAcceptRunt = 0x40000000, 150 RxAcceptErr = 0x80000000, 151 }; 152 153 /* Bits in the RxMode register. */ 154 enum rx_mode_bits { 155 RxFilterEnable = 0x80000000, 156 AcceptAllBroadcast = 0x40000000, 157 AcceptAllMulticast = 0x20000000, 158 AcceptAllUnicast = 0x10000000, 159 AcceptPerfectMatch = 0x08000000, 160 }; 161 162 typedef struct _BufferDesc { 163 u32 link; 164 u32 bufptr; 165 vu_long cmdsts; 166 u32 extsts; /*not used here */ 167 } BufferDesc; 168 169 /* Bits in network_desc.status */ 170 enum desc_status_bits { 171 DescOwn = 0x80000000, DescMore = 0x40000000, DescIntr = 0x20000000, 172 DescNoCRC = 0x10000000, DescPktOK = 0x08000000, 173 DescSizeMask = 0xfff, 174 175 DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000, 176 DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000, 177 DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000, 178 DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000, 179 180 DescRxAbort = 0x04000000, DescRxOver = 0x02000000, 181 DescRxDest = 0x01800000, DescRxLong = 0x00400000, 182 DescRxRunt = 0x00200000, DescRxInvalid = 0x00100000, 183 DescRxCRC = 0x00080000, DescRxAlign = 0x00040000, 184 DescRxLoop = 0x00020000, DesRxColl = 0x00010000, 185 }; 186 187 /* Bits in MEAR */ 188 enum mii_reg_bits { 189 MDIO_ShiftClk = 0x0040, 190 MDIO_EnbOutput = 0x0020, 191 MDIO_Data = 0x0010, 192 }; 193 194 /* PHY Register offsets. */ 195 enum phy_reg_offsets { 196 BMCR = 0x00, 197 BMSR = 0x01, 198 PHYIDR1 = 0x02, 199 PHYIDR2 = 0x03, 200 ANAR = 0x04, 201 KTCR = 0x09, 202 }; 203 204 /* basic mode control register bits */ 205 enum bmcr_bits { 206 Bmcr_Reset = 0x8000, 207 Bmcr_Loop = 0x4000, 208 Bmcr_Speed0 = 0x2000, 209 Bmcr_AutoNegEn = 0x1000, /*if set ignores Duplex, Speed[01] */ 210 Bmcr_RstAutoNeg = 0x0200, 211 Bmcr_Duplex = 0x0100, 212 Bmcr_Speed1 = 0x0040, 213 Bmcr_Force10H = 0x0000, 214 Bmcr_Force10F = 0x0100, 215 Bmcr_Force100H = 0x2000, 216 Bmcr_Force100F = 0x2100, 217 Bmcr_Force1000H = 0x0040, 218 Bmcr_Force1000F = 0x0140, 219 }; 220 221 /* auto negotiation advertisement register */ 222 enum anar_bits { 223 anar_adv_100F = 0x0100, 224 anar_adv_100H = 0x0080, 225 anar_adv_10F = 0x0040, 226 anar_adv_10H = 0x0020, 227 anar_ieee_8023 = 0x0001, 228 }; 229 230 /* 1K-base T control register */ 231 enum ktcr_bits { 232 ktcr_adv_1000H = 0x0100, 233 ktcr_adv_1000F = 0x0200, 234 }; 235 236 /* Globals */ 237 static u32 SavedClkRun; 238 static unsigned int cur_rx; 239 static unsigned int rx_config; 240 static unsigned int tx_config; 241 242 /* Note: transmit and receive buffers and descriptors must be 243 long long word aligned */ 244 static BufferDesc txd __attribute__ ((aligned(8))); 245 static BufferDesc rxd[NUM_RX_DESC] __attribute__ ((aligned(8))); 246 static unsigned char txb[TX_BUF_SIZE] __attribute__ ((aligned(8))); 247 static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE] 248 __attribute__ ((aligned(8))); 249 250 /* Function Prototypes */ 251 static int mdio_read(struct eth_device *dev, int phy_id, int addr); 252 static void mdio_write(struct eth_device *dev, int phy_id, int addr, int value); 253 static void mdio_sync(struct eth_device *dev, u32 offset); 254 static int ns8382x_init(struct eth_device *dev, bd_t * bis); 255 static void ns8382x_reset(struct eth_device *dev); 256 static void ns8382x_init_rxfilter(struct eth_device *dev); 257 static void ns8382x_init_txd(struct eth_device *dev); 258 static void ns8382x_init_rxd(struct eth_device *dev); 259 static void ns8382x_set_rx_mode(struct eth_device *dev); 260 static void ns8382x_check_duplex(struct eth_device *dev); 261 static int ns8382x_send(struct eth_device *dev, void *packet, int length); 262 static int ns8382x_poll(struct eth_device *dev); 263 static void ns8382x_disable(struct eth_device *dev); 264 265 static struct pci_device_id supported[] = { 266 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83820}, 267 {} 268 }; 269 270 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a) 271 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a) 272 273 static inline int 274 INW(struct eth_device *dev, u_long addr) 275 { 276 return le16_to_cpu(*(vu_short *) (addr + dev->iobase)); 277 } 278 279 static int 280 INL(struct eth_device *dev, u_long addr) 281 { 282 return le32_to_cpu(*(vu_long *) (addr + dev->iobase)); 283 } 284 285 static inline void 286 OUTW(struct eth_device *dev, int command, u_long addr) 287 { 288 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command); 289 } 290 291 static inline void 292 OUTL(struct eth_device *dev, int command, u_long addr) 293 { 294 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command); 295 } 296 297 /* Function: ns8382x_initialize 298 * Description: Retrieves the MAC address of the card, and sets up some 299 * globals required by other routines, and initializes the NIC, making it 300 * ready to send and receive packets. 301 * Side effects: initializes ns8382xs, ready to receive packets. 302 * Returns: int: number of cards found 303 */ 304 305 int 306 ns8382x_initialize(bd_t * bis) 307 { 308 pci_dev_t devno; 309 int card_number = 0; 310 struct eth_device *dev; 311 u32 iobase, status; 312 int i, idx = 0; 313 u32 phyAddress; 314 u32 tmp; 315 u32 chip_config; 316 317 while (1) { /* Find PCI device(s) */ 318 if ((devno = pci_find_devices(supported, idx++)) < 0) 319 break; 320 321 pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase); 322 iobase &= ~0x3; /* 1: unused and 0:I/O Space Indicator */ 323 324 debug("ns8382x: NatSemi dp8382x @ 0x%x\n", iobase); 325 326 pci_write_config_dword(devno, PCI_COMMAND, 327 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 328 329 /* Check if I/O accesses and Bus Mastering are enabled. */ 330 pci_read_config_dword(devno, PCI_COMMAND, &status); 331 if (!(status & PCI_COMMAND_MEMORY)) { 332 printf("Error: Can not enable MEM access.\n"); 333 continue; 334 } else if (!(status & PCI_COMMAND_MASTER)) { 335 printf("Error: Can not enable Bus Mastering.\n"); 336 continue; 337 } 338 339 dev = (struct eth_device *) malloc(sizeof *dev); 340 if (!dev) { 341 printf("ns8382x: Can not allocate memory\n"); 342 break; 343 } 344 memset(dev, 0, sizeof(*dev)); 345 346 sprintf(dev->name, "dp8382x#%d", card_number); 347 dev->iobase = bus_to_phys(iobase); 348 dev->priv = (void *) devno; 349 dev->init = ns8382x_init; 350 dev->halt = ns8382x_disable; 351 dev->send = ns8382x_send; 352 dev->recv = ns8382x_poll; 353 354 /* ns8382x has a non-standard PM control register 355 * in PCI config space. Some boards apparently need 356 * to be brought to D0 in this manner. */ 357 pci_read_config_dword(devno, PCIPM, &tmp); 358 if (tmp & (0x03 | 0x100)) { /* D0 state, disable PME assertion */ 359 u32 newtmp = tmp & ~(0x03 | 0x100); 360 pci_write_config_dword(devno, PCIPM, newtmp); 361 } 362 363 /* get MAC address */ 364 for (i = 0; i < 3; i++) { 365 u32 data; 366 char *mac = (char *)&dev->enetaddr[i * 2]; 367 368 OUTL(dev, i * 2, RxFilterAddr); 369 data = INL(dev, RxFilterData); 370 *mac++ = data; 371 *mac++ = data >> 8; 372 } 373 /* get PHY address, can't be zero */ 374 for (phyAddress = 1; phyAddress < 32; phyAddress++) { 375 u32 rev, phy1; 376 377 phy1 = mdio_read(dev, phyAddress, PHYIDR1); 378 if (phy1 == 0x2000) { /*check for 83861/91 */ 379 rev = mdio_read(dev, phyAddress, PHYIDR2); 380 if ((rev & ~(0x000f)) == 0x00005c50 || 381 (rev & ~(0x000f)) == 0x00005c60) { 382 debug("phy rev is %x\n", rev); 383 debug("phy address is %x\n", 384 phyAddress); 385 break; 386 } 387 } 388 } 389 390 /* set phy to autonegotiate && advertise everything */ 391 mdio_write(dev, phyAddress, KTCR, 392 (ktcr_adv_1000H | ktcr_adv_1000F)); 393 mdio_write(dev, phyAddress, ANAR, 394 (anar_adv_100F | anar_adv_100H | anar_adv_10H | 395 anar_adv_10F | anar_ieee_8023)); 396 mdio_write(dev, phyAddress, BMCR, 0x0); /*restore */ 397 mdio_write(dev, phyAddress, BMCR, 398 (Bmcr_AutoNegEn | Bmcr_RstAutoNeg)); 399 /* Reset the chip to erase any previous misconfiguration. */ 400 OUTL(dev, (ChipReset), ChipCmd); 401 402 chip_config = INL(dev, ChipConfig); 403 /* reset the phy */ 404 OUTL(dev, (chip_config | PhyRst), ChipConfig); 405 /* power up and initialize transceiver */ 406 OUTL(dev, (chip_config & ~(PhyDis)), ChipConfig); 407 408 mdio_sync(dev, EECtrl); 409 410 { 411 u32 chpcfg = 412 INL(dev, ChipConfig) ^ SpeedStatus_Polarity; 413 414 debug("%s: Transceiver 10%s %s duplex.\n", dev->name, 415 (chpcfg & GigSpeed) ? "00" : (chpcfg & HundSpeed) 416 ? "0" : "", 417 chpcfg & FullDuplex ? "full" : "half"); 418 debug("%s: %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, 419 dev->enetaddr[0], dev->enetaddr[1], 420 dev->enetaddr[2], dev->enetaddr[3], 421 dev->enetaddr[4], dev->enetaddr[5]); 422 } 423 424 /* Disable PME: 425 * The PME bit is initialized from the EEPROM contents. 426 * PCI cards probably have PME disabled, but motherboard 427 * implementations may have PME set to enable WakeOnLan. 428 * With PME set the chip will scan incoming packets but 429 * nothing will be written to memory. */ 430 SavedClkRun = INL(dev, ClkRun); 431 OUTL(dev, SavedClkRun & ~0x100, ClkRun); 432 433 eth_register(dev); 434 435 card_number++; 436 437 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x60); 438 439 udelay(10 * 1000); 440 } 441 return card_number; 442 } 443 444 /* MII transceiver control section. 445 Read and write MII registers using software-generated serial MDIO 446 protocol. See the MII specifications or DP83840A data sheet for details. 447 448 The maximum data clock rate is 2.5 MHz. To meet minimum timing we 449 must flush writes to the PCI bus with a PCI read. */ 450 #define mdio_delay(mdio_addr) INL(dev, mdio_addr) 451 452 #define MDIO_EnbIn (0) 453 #define MDIO_WRITE0 (MDIO_EnbOutput) 454 #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput) 455 456 /* Generate the preamble required for initial synchronization and 457 a few older transceivers. */ 458 static void 459 mdio_sync(struct eth_device *dev, u32 offset) 460 { 461 int bits = 32; 462 463 /* Establish sync by sending at least 32 logic ones. */ 464 while (--bits >= 0) { 465 OUTL(dev, MDIO_WRITE1, offset); 466 mdio_delay(offset); 467 OUTL(dev, MDIO_WRITE1 | MDIO_ShiftClk, offset); 468 mdio_delay(offset); 469 } 470 } 471 472 static int 473 mdio_read(struct eth_device *dev, int phy_id, int addr) 474 { 475 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | addr; 476 int i, retval = 0; 477 478 /* Shift the read command bits out. */ 479 for (i = 15; i >= 0; i--) { 480 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0; 481 482 OUTL(dev, dataval, EECtrl); 483 mdio_delay(EECtrl); 484 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl); 485 mdio_delay(EECtrl); 486 } 487 /* Read the two transition, 16 data, and wire-idle bits. */ 488 for (i = 19; i > 0; i--) { 489 OUTL(dev, MDIO_EnbIn, EECtrl); 490 mdio_delay(EECtrl); 491 retval = 492 (retval << 1) | ((INL(dev, EECtrl) & MDIO_Data) ? 1 : 0); 493 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl); 494 mdio_delay(EECtrl); 495 } 496 return (retval >> 1) & 0xffff; 497 } 498 499 static void 500 mdio_write(struct eth_device *dev, int phy_id, int addr, int value) 501 { 502 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (addr << 18) | value; 503 int i; 504 505 /* Shift the command bits out. */ 506 for (i = 31; i >= 0; i--) { 507 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0; 508 509 OUTL(dev, dataval, EECtrl); 510 mdio_delay(EECtrl); 511 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl); 512 mdio_delay(EECtrl); 513 } 514 /* Clear out extra bits. */ 515 for (i = 2; i > 0; i--) { 516 OUTL(dev, MDIO_EnbIn, EECtrl); 517 mdio_delay(EECtrl); 518 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl); 519 mdio_delay(EECtrl); 520 } 521 return; 522 } 523 524 /* Function: ns8382x_init 525 * Description: resets the ethernet controller chip and configures 526 * registers and data structures required for sending and receiving packets. 527 * Arguments: struct eth_device *dev: NIC data structure 528 * returns: int. 529 */ 530 531 static int 532 ns8382x_init(struct eth_device *dev, bd_t * bis) 533 { 534 u32 config; 535 536 ns8382x_reset(dev); 537 538 /* Disable PME: 539 * The PME bit is initialized from the EEPROM contents. 540 * PCI cards probably have PME disabled, but motherboard 541 * implementations may have PME set to enable WakeOnLan. 542 * With PME set the chip will scan incoming packets but 543 * nothing will be written to memory. */ 544 OUTL(dev, SavedClkRun & ~0x100, ClkRun); 545 546 ns8382x_init_rxfilter(dev); 547 ns8382x_init_txd(dev); 548 ns8382x_init_rxd(dev); 549 550 /*set up ChipConfig */ 551 config = INL(dev, ChipConfig); 552 /*turn off 64 bit ops && Ten-bit interface 553 * && big-endian mode && extended status */ 554 config &= ~(TBIEn | Mode1000 | T64En | D64En | M64En | BEMode | PhyDis | ExtStEn); 555 OUTL(dev, config, ChipConfig); 556 557 /* Configure the PCI bus bursts and FIFO thresholds. */ 558 tx_config = TxCarrierIgn | TxHeartIgn | TxAutoPad 559 | TxCollRetry | TxMxdma_1024 | (0x1002); 560 rx_config = RxMxdma_1024 | 0x20; 561 562 debug("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config); 563 debug("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config); 564 565 OUTL(dev, tx_config, TxConfig); 566 OUTL(dev, rx_config, RxConfig); 567 568 /*turn off priority queueing */ 569 OUTL(dev, 0x0, PriQueue); 570 571 ns8382x_check_duplex(dev); 572 ns8382x_set_rx_mode(dev); 573 574 OUTL(dev, (RxOn | TxOn), ChipCmd); 575 return 1; 576 } 577 578 /* Function: ns8382x_reset 579 * Description: soft resets the controller chip 580 * Arguments: struct eth_device *dev: NIC data structure 581 * Returns: void. 582 */ 583 static void 584 ns8382x_reset(struct eth_device *dev) 585 { 586 OUTL(dev, ChipReset, ChipCmd); 587 while (INL(dev, ChipCmd)) 588 /*wait until done */ ; 589 OUTL(dev, 0, IntrMask); 590 OUTL(dev, 0, IntrEnable); 591 } 592 593 /* Function: ns8382x_init_rxfilter 594 * Description: sets receive filter address to our MAC address 595 * Arguments: struct eth_device *dev: NIC data structure 596 * returns: void. 597 */ 598 599 static void 600 ns8382x_init_rxfilter(struct eth_device *dev) 601 { 602 int i; 603 604 for (i = 0; i < ETH_ALEN; i += 2) { 605 OUTL(dev, i, RxFilterAddr); 606 OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8), 607 RxFilterData); 608 } 609 } 610 611 /* Function: ns8382x_init_txd 612 * Description: initializes the Tx descriptor 613 * Arguments: struct eth_device *dev: NIC data structure 614 * returns: void. 615 */ 616 617 static void 618 ns8382x_init_txd(struct eth_device *dev) 619 { 620 txd.link = (u32) 0; 621 txd.bufptr = cpu_to_le32((u32) & txb[0]); 622 txd.cmdsts = (u32) 0; 623 txd.extsts = (u32) 0; 624 625 OUTL(dev, 0x0, TxRingPtrHi); 626 OUTL(dev, phys_to_bus((u32)&txd), TxRingPtr); 627 628 debug("ns8382x_init_txd: TX descriptor register loaded with: %#08X (&txd: %p)\n", 629 INL(dev, TxRingPtr), &txd); 630 } 631 632 /* Function: ns8382x_init_rxd 633 * Description: initializes the Rx descriptor ring 634 * Arguments: struct eth_device *dev: NIC data structure 635 * Returns: void. 636 */ 637 638 static void 639 ns8382x_init_rxd(struct eth_device *dev) 640 { 641 int i; 642 643 OUTL(dev, 0x0, RxRingPtrHi); 644 645 cur_rx = 0; 646 for (i = 0; i < NUM_RX_DESC; i++) { 647 rxd[i].link = 648 cpu_to_le32((i + 1 < 649 NUM_RX_DESC) ? (u32) & rxd[i + 650 1] : (u32) & 651 rxd[0]); 652 rxd[i].extsts = cpu_to_le32((u32) 0x0); 653 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE); 654 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]); 655 656 debug 657 ("ns8382x_init_rxd: rxd[%d]=%p link=%X cmdsts=%X bufptr=%X\n", 658 i, &rxd[i], le32_to_cpu(rxd[i].link), 659 le32_to_cpu(rxd[i].cmdsts), le32_to_cpu(rxd[i].bufptr)); 660 } 661 OUTL(dev, phys_to_bus((u32) & rxd), RxRingPtr); 662 663 debug("ns8382x_init_rxd: RX descriptor register loaded with: %X\n", 664 INL(dev, RxRingPtr)); 665 } 666 667 /* Function: ns8382x_set_rx_mode 668 * Description: 669 * sets the receive mode to accept all broadcast packets and packets 670 * with our MAC address, and reject all multicast packets. 671 * Arguments: struct eth_device *dev: NIC data structure 672 * Returns: void. 673 */ 674 675 static void 676 ns8382x_set_rx_mode(struct eth_device *dev) 677 { 678 u32 rx_mode = 0x0; 679 /*spec says RxFilterEnable has to be 0 for rest of 680 * this stuff to be properly configured. Linux driver 681 * seems to support this*/ 682 /* OUTL(dev, rx_mode, RxFilterAddr);*/ 683 rx_mode = (RxFilterEnable | AcceptAllBroadcast | AcceptPerfectMatch); 684 OUTL(dev, rx_mode, RxFilterAddr); 685 printf("ns8382x_set_rx_mode: set to %X\n", rx_mode); 686 /*now we turn RxFilterEnable back on */ 687 /*rx_mode |= RxFilterEnable; 688 OUTL(dev, rx_mode, RxFilterAddr);*/ 689 } 690 691 static void 692 ns8382x_check_duplex(struct eth_device *dev) 693 { 694 int gig = 0; 695 int hun = 0; 696 int duplex = 0; 697 int config = (INL(dev, ChipConfig) ^ SpeedStatus_Polarity); 698 699 duplex = (config & FullDuplex) ? 1 : 0; 700 gig = (config & GigSpeed) ? 1 : 0; 701 hun = (config & HundSpeed) ? 1 : 0; 702 703 debug("%s: Setting 10%s %s-duplex based on negotiated link" 704 " capability.\n", dev->name, (gig) ? "00" : (hun) ? "0" : "", 705 duplex ? "full" : "half"); 706 707 if (duplex) { 708 rx_config |= RxAcceptTx; 709 tx_config |= (TxCarrierIgn | TxHeartIgn); 710 } else { 711 rx_config &= ~RxAcceptTx; 712 tx_config &= ~(TxCarrierIgn | TxHeartIgn); 713 } 714 715 debug("%s: Resetting TxConfig Register %#08X\n", dev->name, tx_config); 716 debug("%s: Resetting RxConfig Register %#08X\n", dev->name, rx_config); 717 718 OUTL(dev, tx_config, TxConfig); 719 OUTL(dev, rx_config, RxConfig); 720 721 /*if speed is 10 or 100, remove MODE1000, 722 * if it's 1000, then set it */ 723 config = INL(dev, ChipConfig); 724 if (gig) 725 config |= Mode1000; 726 else 727 config &= ~Mode1000; 728 729 debug("%s: %setting Mode1000\n", dev->name, (gig) ? "S" : "Uns"); 730 731 OUTL(dev, config, ChipConfig); 732 } 733 734 /* Function: ns8382x_send 735 * Description: transmits a packet and waits for completion or timeout. 736 * Returns: void. */ 737 static int ns8382x_send(struct eth_device *dev, void *packet, int length) 738 { 739 u32 i, status = 0; 740 vu_long tx_stat = 0; 741 742 /* Stop the transmitter */ 743 OUTL(dev, TxOff, ChipCmd); 744 745 debug("ns8382x_send: sending %d bytes\n", (int)length); 746 747 /* set the transmit buffer descriptor and enable Transmit State Machine */ 748 txd.link = cpu_to_le32(0x0); 749 txd.bufptr = cpu_to_le32(phys_to_bus((u32)packet)); 750 txd.extsts = cpu_to_le32(0x0); 751 txd.cmdsts = cpu_to_le32(DescOwn | length); 752 753 /* load Transmit Descriptor Register */ 754 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr); 755 756 debug("ns8382x_send: TX descriptor register loaded with: %#08X\n", 757 INL(dev, TxRingPtr)); 758 debug("\ttxd.link:%X\tbufp:%X\texsts:%X\tcmdsts:%X\n", 759 le32_to_cpu(txd.link), le32_to_cpu(txd.bufptr), 760 le32_to_cpu(txd.extsts), le32_to_cpu(txd.cmdsts)); 761 762 /* restart the transmitter */ 763 OUTL(dev, TxOn, ChipCmd); 764 765 for (i = 0; (tx_stat = le32_to_cpu(txd.cmdsts)) & DescOwn; i++) { 766 if (i >= TOUT_LOOP) { 767 printf ("%s: tx error buffer not ready: txd.cmdsts %#lX\n", 768 dev->name, tx_stat); 769 goto Done; 770 } 771 } 772 773 if (!(tx_stat & DescPktOK)) { 774 printf("ns8382x_send: Transmit error, Tx status %lX.\n", tx_stat); 775 goto Done; 776 } 777 778 debug("ns8382x_send: tx_stat: %#08lX\n", tx_stat); 779 780 status = 1; 781 Done: 782 return status; 783 } 784 785 /* Function: ns8382x_poll 786 * Description: checks for a received packet and returns it if found. 787 * Arguments: struct eth_device *dev: NIC data structure 788 * Returns: 1 if packet was received. 789 * 0 if no packet was received. 790 * Side effects: 791 * Returns (copies) the packet to the array dev->packet. 792 * Returns the length of the packet. 793 */ 794 795 static int 796 ns8382x_poll(struct eth_device *dev) 797 { 798 int retstat = 0; 799 int length = 0; 800 vu_long rx_status = le32_to_cpu(rxd[cur_rx].cmdsts); 801 802 if (!(rx_status & (u32) DescOwn)) 803 return retstat; 804 805 debug("ns8382x_poll: got a packet: cur_rx:%u, status:%lx\n", 806 cur_rx, rx_status); 807 808 length = (rx_status & DSIZE) - CRC_SIZE; 809 810 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) { 811 /* corrupted packet received */ 812 printf("ns8382x_poll: Corrupted packet, status:%lx\n", 813 rx_status); 814 retstat = 0; 815 } else { 816 /* give packet to higher level routine */ 817 net_process_received_packet((rxb + cur_rx * RX_BUF_SIZE), 818 length); 819 retstat = 1; 820 } 821 822 /* return the descriptor and buffer to receive ring */ 823 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE); 824 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]); 825 826 if (++cur_rx == NUM_RX_DESC) 827 cur_rx = 0; 828 829 /* re-enable the potentially idle receive state machine */ 830 OUTL(dev, RxOn, ChipCmd); 831 832 return retstat; 833 } 834 835 /* Function: ns8382x_disable 836 * Description: Turns off interrupts and stops Tx and Rx engines 837 * Arguments: struct eth_device *dev: NIC data structure 838 * Returns: void. 839 */ 840 841 static void 842 ns8382x_disable(struct eth_device *dev) 843 { 844 /* Disable interrupts using the mask. */ 845 OUTL(dev, 0, IntrMask); 846 OUTL(dev, 0, IntrEnable); 847 848 /* Stop the chip's Tx and Rx processes. */ 849 OUTL(dev, (RxOff | TxOff), ChipCmd); 850 851 /* Restore PME enable bit */ 852 OUTL(dev, SavedClkRun, ClkRun); 853 } 854
