1/* rhine.c:Fast Ethernet driver for Linux. */ 2/* 3 Adapted 09-jan-2000 by Paolo Marini (paolom@prisma-eng.it) 4 5 originally written by Donald Becker. 6 7 This software may be used and distributed according to the terms 8 of the GNU Public License (GPL), incorporated herein by reference. 9 Drivers derived from this code also fall under the GPL and must retain 10 this authorship and copyright notice. 11 12 Under no circumstances are the authors responsible for 13 the proper functioning of this software, nor do the authors assume any 14 responsibility for damages incurred with its use. 15 16 This driver is designed for the VIA VT86C100A Rhine-II PCI Fast Ethernet 17 controller. 18 19*/ 20 21static const char *version = "rhine.c v1.0.0 2000-01-07\n"; 22 23/* A few user-configurable values. */ 24 25/* Size of the in-memory receive ring. */ 26#define RX_BUF_LEN_IDX 3 /* 0==8K, 1==16K, 2==32K, 3==64K */ 27#define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX) 28 29/* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */ 30#define TX_BUF_SIZE 1536 31#define RX_BUF_SIZE 1536 32 33/* PCI Tuning Parameters 34 Threshold is bytes transferred to chip before transmission starts. */ 35#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */ 36 37/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024. */ 38#define RX_FIFO_THRESH 4 /* Rx buffer level before first PCI xfer. */ 39#define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 bytes */ 40#define TX_DMA_BURST 4 41 42/* Operational parameters that usually are not changed. */ 43/* Time in jiffies before concluding the transmitter is hung. */ 44#define TX_TIMEOUT ((2000*HZ)/1000) 45 46#include "etherboot.h" 47#include "nic.h" 48#include "pci.h" 49#include "cards.h" 50 51/* define all ioaddr */ 52 53#define byPAR0 ioaddr 54#define byRCR ioaddr + 6 55#define byTCR ioaddr + 7 56#define byCR0 ioaddr + 8 57#define byCR1 ioaddr + 9 58#define byISR0 ioaddr + 0x0c 59#define byISR1 ioaddr + 0x0d 60#define byIMR0 ioaddr + 0x0e 61#define byIMR1 ioaddr + 0x0f 62#define byMAR0 ioaddr + 0x10 63#define byMAR1 ioaddr + 0x11 64#define byMAR2 ioaddr + 0x12 65#define byMAR3 ioaddr + 0x13 66#define byMAR4 ioaddr + 0x14 67#define byMAR5 ioaddr + 0x15 68#define byMAR6 ioaddr + 0x16 69#define byMAR7 ioaddr + 0x17 70#define dwCurrentRxDescAddr ioaddr + 0x18 71#define dwCurrentTxDescAddr ioaddr + 0x1c 72#define dwCurrentRDSE0 ioaddr + 0x20 73#define dwCurrentRDSE1 ioaddr + 0x24 74#define dwCurrentRDSE2 ioaddr + 0x28 75#define dwCurrentRDSE3 ioaddr + 0x2c 76#define dwNextRDSE0 ioaddr + 0x30 77#define dwNextRDSE1 ioaddr + 0x34 78#define dwNextRDSE2 ioaddr + 0x38 79#define dwNextRDSE3 ioaddr + 0x3c 80#define dwCurrentTDSE0 ioaddr + 0x40 81#define dwCurrentTDSE1 ioaddr + 0x44 82#define dwCurrentTDSE2 ioaddr + 0x48 83#define dwCurrentTDSE3 ioaddr + 0x4c 84#define dwNextTDSE0 ioaddr + 0x50 85#define dwNextTDSE1 ioaddr + 0x54 86#define dwNextTDSE2 ioaddr + 0x58 87#define dwNextTDSE3 ioaddr + 0x5c 88#define dwCurrRxDMAPtr ioaddr + 0x60 89#define dwCurrTxDMAPtr ioaddr + 0x64 90#define byMPHY ioaddr + 0x6c 91#define byMIISR ioaddr + 0x6d 92#define byBCR0 ioaddr + 0x6e 93#define byBCR1 ioaddr + 0x6f 94#define byMIICR ioaddr + 0x70 95#define byMIIAD ioaddr + 0x71 96#define wMIIDATA ioaddr + 0x72 97#define byEECSR ioaddr + 0x74 98#define byTEST ioaddr + 0x75 99#define byGPIO ioaddr + 0x76 100#define byCFGA ioaddr + 0x78 101#define byCFGB ioaddr + 0x79 102#define byCFGC ioaddr + 0x7a 103#define byCFGD ioaddr + 0x7b 104#define wTallyCntMPA ioaddr + 0x7c 105#define wTallyCntCRC ioaddr + 0x7d 106/*--------------------- Exioaddr Definitions -------------------------*/ 107 108/* 109 * Bits in the RCR register 110 */ 111 112#define RCR_RRFT2 0x80 113#define RCR_RRFT1 0x40 114#define RCR_RRFT0 0x20 115#define RCR_PROM 0x10 116#define RCR_AB 0x08 117#define RCR_AM 0x04 118#define RCR_AR 0x02 119#define RCR_SEP 0x01 120 121/* 122 * Bits in the TCR register 123 */ 124 125#define TCR_RTSF 0x80 126#define TCR_RTFT1 0x40 127#define TCR_RTFT0 0x20 128#define TCR_OFSET 0x08 129#define TCR_LB1 0x04 /* loopback[1] */ 130#define TCR_LB0 0x02 /* loopback[0] */ 131 132/* 133 * Bits in the CR0 register 134 */ 135 136#define CR0_RDMD 0x40 /* rx descriptor polling demand */ 137#define CR0_TDMD 0x20 /* tx descriptor polling demand */ 138#define CR0_TXON 0x10 139#define CR0_RXON 0x08 140#define CR0_STOP 0x04 /* stop NIC, default = 1 */ 141#define CR0_STRT 0x02 /* start NIC */ 142#define CR0_INIT 0x01 /* start init process */ 143 144 145/* 146 * Bits in the CR1 register 147 */ 148 149#define CR1_SFRST 0x80 /* software reset */ 150#define CR1_RDMD1 0x40 /* RDMD1 */ 151#define CR1_TDMD1 0x20 /* TDMD1 */ 152#define CR1_KEYPAG 0x10 /* turn on par/key */ 153#define CR1_DPOLL 0x08 /* disable rx/tx auto polling */ 154#define CR1_FDX 0x04 /* full duplex mode */ 155#define CR1_ETEN 0x02 /* early tx mode */ 156#define CR1_EREN 0x01 /* early rx mode */ 157 158/* 159 * Bits in the CR register 160 */ 161 162#define CR_RDMD 0x0040 /* rx descriptor polling demand */ 163#define CR_TDMD 0x0020 /* tx descriptor polling demand */ 164#define CR_TXON 0x0010 165#define CR_RXON 0x0008 166#define CR_STOP 0x0004 /* stop NIC, default = 1 */ 167#define CR_STRT 0x0002 /* start NIC */ 168#define CR_INIT 0x0001 /* start init process */ 169#define CR_SFRST 0x8000 /* software reset */ 170#define CR_RDMD1 0x4000 /* RDMD1 */ 171#define CR_TDMD1 0x2000 /* TDMD1 */ 172#define CR_KEYPAG 0x1000 /* turn on par/key */ 173#define CR_DPOLL 0x0800 /* disable rx/tx auto polling */ 174#define CR_FDX 0x0400 /* full duplex mode */ 175#define CR_ETEN 0x0200 /* early tx mode */ 176#define CR_EREN 0x0100 /* early rx mode */ 177 178/* 179 * Bits in the IMR0 register 180 */ 181 182#define IMR0_CNTM 0x80 183#define IMR0_BEM 0x40 184#define IMR0_RUM 0x20 185#define IMR0_TUM 0x10 186#define IMR0_TXEM 0x08 187#define IMR0_RXEM 0x04 188#define IMR0_PTXM 0x02 189#define IMR0_PRXM 0x01 190 191/* define imrshadow */ 192 193#define IMRShadow 0x5AFF 194 195/* 196 * Bits in the IMR1 register 197 */ 198 199#define IMR1_INITM 0x80 200#define IMR1_SRCM 0x40 201#define IMR1_NBFM 0x10 202#define IMR1_PRAIM 0x08 203#define IMR1_RES0M 0x04 204#define IMR1_ETM 0x02 205#define IMR1_ERM 0x01 206 207/* 208 * Bits in the ISR register 209 */ 210 211#define ISR_INITI 0x8000 212#define ISR_SRCI 0x4000 213#define ISR_ABTI 0x2000 214#define ISR_NORBF 0x1000 215#define ISR_PKTRA 0x0800 216#define ISR_RES0 0x0400 217#define ISR_ETI 0x0200 218#define ISR_ERI 0x0100 219#define ISR_CNT 0x0080 220#define ISR_BE 0x0040 221#define ISR_RU 0x0020 222#define ISR_TU 0x0010 223#define ISR_TXE 0x0008 224#define ISR_RXE 0x0004 225#define ISR_PTX 0x0002 226#define ISR_PRX 0x0001 227 228/* 229 * Bits in the ISR0 register 230 */ 231 232#define ISR0_CNT 0x80 233#define ISR0_BE 0x40 234#define ISR0_RU 0x20 235#define ISR0_TU 0x10 236#define ISR0_TXE 0x08 237#define ISR0_RXE 0x04 238#define ISR0_PTX 0x02 239#define ISR0_PRX 0x01 240 241/* 242 * Bits in the ISR1 register 243 */ 244 245#define ISR1_INITI 0x80 246#define ISR1_SRCI 0x40 247#define ISR1_NORBF 0x10 248#define ISR1_PKTRA 0x08 249#define ISR1_ETI 0x02 250#define ISR1_ERI 0x01 251 252/* ISR ABNORMAL CONDITION */ 253 254#define ISR_ABNORMAL ISR_BE+ISR_RU+ISR_TU+ISR_CNT+ISR_NORBF+ISR_PKTRA 255 256/* 257 * Bits in the MIISR register 258 */ 259 260#define MIISR_MIIERR 0x08 261#define MIISR_MRERR 0x04 262#define MIISR_LNKFL 0x02 263#define MIISR_SPEED 0x01 264 265/* 266 * Bits in the MIICR register 267 */ 268 269#define MIICR_MAUTO 0x80 270#define MIICR_RCMD 0x40 271#define MIICR_WCMD 0x20 272#define MIICR_MDPM 0x10 273#define MIICR_MOUT 0x08 274#define MIICR_MDO 0x04 275#define MIICR_MDI 0x02 276#define MIICR_MDC 0x01 277 278/* 279 * Bits in the EECSR register 280 */ 281 282#define EECSR_EEPR 0x80 /* eeprom programed status, 73h means programed */ 283#define EECSR_EMBP 0x40 /* eeprom embeded programming */ 284#define EECSR_AUTOLD 0x20 /* eeprom content reload */ 285#define EECSR_DPM 0x10 /* eeprom direct programming */ 286#define EECSR_CS 0x08 /* eeprom CS pin */ 287#define EECSR_SK 0x04 /* eeprom SK pin */ 288#define EECSR_DI 0x02 /* eeprom DI pin */ 289#define EECSR_DO 0x01 /* eeprom DO pin */ 290 291/* 292 * Bits in the BCR0 register 293 */ 294 295#define BCR0_CRFT2 0x20 296#define BCR0_CRFT1 0x10 297#define BCR0_CRFT0 0x08 298#define BCR0_DMAL2 0x04 299#define BCR0_DMAL1 0x02 300#define BCR0_DMAL0 0x01 301 302/* 303 * Bits in the BCR1 register 304 */ 305 306#define BCR1_CTSF 0x20 307#define BCR1_CTFT1 0x10 308#define BCR1_CTFT0 0x08 309#define BCR1_POT2 0x04 310#define BCR1_POT1 0x02 311#define BCR1_POT0 0x01 312 313/* 314 * Bits in the CFGA register 315 */ 316 317#define CFGA_EELOAD 0x80 /* enable eeprom embeded and direct programming */ 318#define CFGA_JUMPER 0x40 319#define CFGA_MTGPIO 0x08 320#define CFGA_T10EN 0x02 321#define CFGA_AUTO 0x01 322 323/* 324 * Bits in the CFGB register 325 */ 326 327#define CFGB_PD 0x80 328#define CFGB_POLEN 0x02 329#define CFGB_LNKEN 0x01 330 331/* 332 * Bits in the CFGC register 333 */ 334 335#define CFGC_M10TIO 0x80 336#define CFGC_M10POL 0x40 337#define CFGC_PHY1 0x20 338#define CFGC_PHY0 0x10 339#define CFGC_BTSEL 0x08 340#define CFGC_BPS2 0x04 /* bootrom select[2] */ 341#define CFGC_BPS1 0x02 /* bootrom select[1] */ 342#define CFGC_BPS0 0x01 /* bootrom select[0] */ 343 344/* 345 * Bits in the CFGD register 346 */ 347 348#define CFGD_GPIOEN 0x80 349#define CFGD_DIAG 0x40 350#define CFGD_MAGIC 0x10 351#define CFGD_CFDX 0x04 352#define CFGD_CEREN 0x02 353#define CFGD_CETEN 0x01 354 355/* Bits in RSR */ 356#define RSR_RERR 0x00000001 357#define RSR_CRC 0x00000002 358#define RSR_FAE 0x00000004 359#define RSR_FOV 0x00000008 360#define RSR_LONG 0x00000010 361#define RSR_RUNT 0x00000020 362#define RSR_SERR 0x00000040 363#define RSR_BUFF 0x00000080 364#define RSR_EDP 0x00000100 365#define RSR_STP 0x00000200 366#define RSR_CHN 0x00000400 367#define RSR_PHY 0x00000800 368#define RSR_BAR 0x00001000 369#define RSR_MAR 0x00002000 370#define RSR_RXOK 0x00008000 371#define RSR_ABNORMAL RSR_RERR+RSR_LONG+RSR_RUNT 372 373/* Bits in TSR */ 374#define TSR_NCR0 0x00000001 375#define TSR_NCR1 0x00000002 376#define TSR_NCR2 0x00000004 377#define TSR_NCR3 0x00000008 378#define TSR_COLS 0x00000010 379#define TSR_CDH 0x00000080 380#define TSR_ABT 0x00000100 381#define TSR_OWC 0x00000200 382#define TSR_CRS 0x00000400 383#define TSR_UDF 0x00000800 384#define TSR_TBUFF 0x00001000 385#define TSR_SERR 0x00002000 386#define TSR_JAB 0x00004000 387#define TSR_TERR 0x00008000 388#define TSR_ABNORMAL TSR_TERR+TSR_OWC+TSR_ABT+TSR_JAB+TSR_CRS 389#define TSR_OWN_BIT 0x80000000 390 391#define CB_DELAY_LOOP_WAIT 10 /* 10ms */ 392/* enabled mask value of irq */ 393 394#define W_IMR_MASK_VALUE 0x1BFF /* initial value of IMR */ 395 396/* Ethernet address filter type */ 397#define PKT_TYPE_DIRECTED 0x0001 /* obsolete, directed address is always accepted */ 398#define PKT_TYPE_MULTICAST 0x0002 399#define PKT_TYPE_ALL_MULTICAST 0x0004 400#define PKT_TYPE_BROADCAST 0x0008 401#define PKT_TYPE_PROMISCUOUS 0x0020 402#define PKT_TYPE_LONG 0x2000 403#define PKT_TYPE_RUNT 0x4000 404#define PKT_TYPE_ERROR 0x8000 /* accept error packets, e.g. CRC error */ 405 406/* Loopback mode */ 407 408#define NIC_LB_NONE 0x00 409#define NIC_LB_INTERNAL 0x01 410#define NIC_LB_PHY 0x02 /* MII or Internal-10BaseT loopback */ 411 412#define TX_RING_SIZE 2 413#define RX_RING_SIZE 2 414#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */ 415 416/* Transmit and receive descriptors definition */ 417 418struct rhine_tx_desc 419{ 420 union VTC_tx_status_tag 421 { 422 struct 423 { 424 unsigned long ncro:1; 425 unsigned long ncr1:1; 426 unsigned long ncr2:1; 427 unsigned long ncr3:1; 428 unsigned long cols:1; 429 unsigned long reserve_1:2; 430 unsigned long cdh:1; 431 unsigned long abt:1; 432 unsigned long owc:1; 433 unsigned long crs:1; 434 unsigned long udf:1; 435 unsigned long tbuff:1; 436 unsigned long serr:1; 437 unsigned long jab:1; 438 unsigned long terr:1; 439 unsigned long reserve_2:15; 440 unsigned long own_bit:1; 441 } 442 bits; 443 unsigned long lw; 444 } 445 tx_status; 446 447 union VTC_tx_ctrl_tag 448 { 449 struct 450 { 451 unsigned long tx_buf_size:11; 452 unsigned long extend_tx_buf_size:4; 453 unsigned long chn:1; 454 unsigned long crc:1; 455 unsigned long reserve_1:4; 456 unsigned long stp:1; 457 unsigned long edp:1; 458 unsigned long ic:1; 459 unsigned long reserve_2:8; 460 } 461 bits; 462 unsigned long lw; 463 } 464 tx_ctrl; 465 466 unsigned long buf_addr_1:32; 467 unsigned long buf_addr_2:32; 468 469}; 470 471struct rhine_rx_desc 472{ 473 union VTC_rx_status_tag 474 { 475 struct 476 { 477 unsigned long rerr:1; 478 unsigned long crc_error:1; 479 unsigned long fae:1; 480 unsigned long fov:1; 481 unsigned long toolong:1; 482 unsigned long runt:1; 483 unsigned long serr:1; 484 unsigned long buff:1; 485 unsigned long edp:1; 486 unsigned long stp:1; 487 unsigned long chn:1; 488 unsigned long phy:1; 489 unsigned long bar:1; 490 unsigned long mar:1; 491 unsigned long reserve_1:1; 492 unsigned long rxok:1; 493 unsigned long frame_length:11; 494 unsigned long reverve_2:4; 495 unsigned long own_bit:1; 496 } 497 bits; 498 unsigned long lw; 499 } 500 rx_status; 501 502 union VTC_rx_ctrl_tag 503 { 504 struct 505 { 506 unsigned long rx_buf_size:11; 507 unsigned long extend_rx_buf_size:4; 508 unsigned long reserved_1:17; 509 } 510 bits; 511 unsigned long lw; 512 } 513 rx_ctrl; 514 515 unsigned long buf_addr_1:32; 516 unsigned long buf_addr_2:32; 517 518}; 519 520 521/* The I/O extent. */ 522#define rhine_TOTAL_SIZE 0x80 523 524#ifdef HAVE_DEVLIST 525struct netdev_entry rhine_drv = 526 { "rhine", rhine_probe, rhine_TOTAL_SIZE, NULL }; 527#endif 528 529static int rhine_debug = 1; 530 531/* 532 Theory of Operation 533 534I. Board Compatibility 535 536This driver is designed for the VIA 86c100A Rhine-II PCI Fast Ethernet 537controller. 538 539II. Board-specific settings 540 541Boards with this chip are functional only in a bus-master PCI slot. 542 543Many operational settings are loaded from the EEPROM to the Config word at 544offset 0x78. This driver assumes that they are correct. 545If this driver is compiled to use PCI memory space operations the EEPROM 546must be configured to enable memory ops. 547 548III. Driver operation 549 550IIIa. Ring buffers 551 552This driver uses two statically allocated fixed-size descriptor lists 553formed into rings by a branch from the final descriptor to the beginning of 554the list. The ring sizes are set at compile time by RX/TX_RING_SIZE. 555 556IIIb/c. Transmit/Receive Structure 557 558This driver attempts to use a zero-copy receive and transmit scheme. 559 560Alas, all data buffers are required to start on a 32 bit boundary, so 561the driver must often copy transmit packets into bounce buffers. 562 563The driver allocates full frame size skbuffs for the Rx ring buffers at 564open() time and passes the skb->data field to the chip as receive data 565buffers. When an incoming frame is less than RX_COPYBREAK bytes long, 566a fresh skbuff is allocated and the frame is copied to the new skbuff. 567When the incoming frame is larger, the skbuff is passed directly up the 568protocol stack. Buffers consumed this way are replaced by newly allocated 569skbuffs in the last phase of netdev_rx(). 570 571The RX_COPYBREAK value is chosen to trade-off the memory wasted by 572using a full-sized skbuff for small frames vs. the copying costs of larger 573frames. New boards are typically used in generously configured machines 574and the underfilled buffers have negligible impact compared to the benefit of 575a single allocation size, so the default value of zero results in never 576copying packets. When copying is done, the cost is usually mitigated by using 577a combined copy/checksum routine. Copying also preloads the cache, which is 578most useful with small frames. 579 580Since the VIA chips are only able to transfer data to buffers on 32 bit 581boundaries, the the IP header at offset 14 in an ethernet frame isn't 582longword aligned for further processing. Copying these unaligned buffers 583has the beneficial effect of 16-byte aligning the IP header. 584 585IIId. Synchronization 586 587The driver runs as two independent, single-threaded flows of control. One 588is the send-packet routine, which enforces single-threaded use by the 589dev->tbusy flag. The other thread is the interrupt handler, which is single 590threaded by the hardware and interrupt handling software. 591 592The send packet thread has partial control over the Tx ring and 'dev->tbusy' 593flag. It sets the tbusy flag whenever it's queuing a Tx packet. If the next 594queue slot is empty, it clears the tbusy flag when finished otherwise it sets 595the 'lp->tx_full' flag. 596 597The interrupt handler has exclusive control over the Rx ring and records stats 598from the Tx ring. After reaping the stats, it marks the Tx queue entry as 599empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it 600clears both the tx_full and tbusy flags. 601 602IV. Notes 603 604IVb. References 605 606Preliminary VT86C100A manual from http://www.via.com.tw/ 607http://cesdis.gsfc.nasa.gov/linux/misc/100mbps.html 608http://cesdis.gsfc.nasa.gov/linux/misc/NWay.html 609 610IVc. Errata 611 612The VT86C100A manual is not reliable information. 613The chip does not handle unaligned transmit or receive buffers, resulting 614in significant performance degradation for bounce buffer copies on transmit 615and unaligned IP headers on receive. 616The chip does not pad to minimum transmit length. 617 618*/ 619 620#define PCI_VENDOR_ID_FET 0x1106 621#define PCI_DEVICE_ID_FET_3043 0x3043 622 623/* The rest of these values should never change. */ 624#define NUM_TX_DESC 2 /* Number of Tx descriptor registers. */ 625 626static struct rhine_private 627{ 628 char devname[8]; /* Used only for kernel debugging. */ 629 const char *product_name; 630 struct rhine_rx_desc *rx_ring; 631 struct rhine_tx_desc *tx_ring; 632 char *rx_buffs[RX_RING_SIZE]; 633 char *tx_buffs[TX_RING_SIZE]; 634 635 /* temporary Rx buffers. */ 636 637 int chip_id; 638 int chip_revision; 639 unsigned short ioaddr; 640 unsigned int cur_rx, cur_tx; /* The next free and used entries */ 641 unsigned int dirty_rx, dirty_tx; 642 /* The saved address of a sent-in-place packet/buffer, for skfree(). */ 643 struct sk_buff *tx_skbuff[TX_RING_SIZE]; 644 unsigned char mc_filter[8]; /* Current multicast filter. */ 645 char phys[4]; /* MII device addresses. */ 646 unsigned int tx_full:1; /* The Tx queue is full. */ 647 unsigned int full_duplex:1; /* Full-duplex operation requested. */ 648 unsigned int default_port:4; /* Last dev->if_port value. */ 649 unsigned int media2:4; /* Secondary monitored media port. */ 650 unsigned int medialock:1; /* Don't sense media type. */ 651 unsigned int mediasense:1; /* Media sensing in progress. */ 652} 653rhine; 654 655static struct nic *rhine_probe1 (struct nic *dev, int ioaddr, 656 int chip_id, int options); 657static int QueryAuto (int); 658static int ReadMII (int byMIIIndex, int); 659static void WriteMII (char, char, char, int); 660static void MIIDelay (void); 661static void rhine_init_ring (struct nic *dev); 662static void rhine_disable (struct nic *nic); 663static void rhine_reset (struct nic *nic); 664static int rhine_poll (struct nic *nic); 665static void rhine_transmit (struct nic *nic, const char *d, unsigned int t, 666 unsigned int s, const char *p); 667 668/* Linux support functions */ 669#define virt_to_bus(x) ((unsigned long)x) 670#define bus_to_virt(x) ((void *)x) 671 672/* Initialize the Rx and Tx rings, along with various 'dev' bits. */ 673static void 674rhine_init_ring (struct nic *nic) 675{ 676 struct rhine_private *tp = (struct rhine_private *) nic->priv_data; 677 int i; 678 679 tp->tx_full = 0; 680 tp->cur_rx = tp->cur_tx = 0; 681 tp->dirty_rx = tp->dirty_tx = 0; 682 683 for (i = 0; i < RX_RING_SIZE; i++) 684 { 685 686 tp->rx_ring[i].rx_status.bits.own_bit = 1; 687 tp->rx_ring[i].rx_ctrl.bits.rx_buf_size = 1536; 688 689 tp->rx_ring[i].buf_addr_1 = virt_to_bus (tp->rx_buffs[i]); 690 tp->rx_ring[i].buf_addr_2 = virt_to_bus (&tp->rx_ring[i + 1]); 691 /* printf("[%d]buf1=%hX,buf2=%hX",i,tp->rx_ring[i].buf_addr_1,tp->rx_ring[i].buf_addr_2); */ 692 } 693 /* Mark the last entry as wrapping the ring. */ 694 /* tp->rx_ring[i-1].rx_ctrl.bits.rx_buf_size =1518; */ 695 tp->rx_ring[i - 1].buf_addr_2 = virt_to_bus (&tp->rx_ring[0]); 696 /*printf("[%d]buf1=%hX,buf2=%hX",i-1,tp->rx_ring[i-1].buf_addr_1,tp->rx_ring[i-1].buf_addr_2); */ 697 698 /* The Tx buffer descriptor is filled in as needed, but we 699 do need to clear the ownership bit. */ 700 701 for (i = 0; i < TX_RING_SIZE; i++) 702 { 703 704 tp->tx_ring[i].tx_status.lw = 0; 705 tp->tx_ring[i].tx_ctrl.lw = 0x00e08000; 706 tp->tx_ring[i].buf_addr_1 = virt_to_bus (tp->tx_buffs[i]); 707 tp->tx_ring[i].buf_addr_2 = virt_to_bus (&tp->tx_ring[i + 1]); 708 /* printf("[%d]buf1=%hX,buf2=%hX",i,tp->tx_ring[i].buf_addr_1,tp->tx_ring[i].buf_addr_2); */ 709 } 710 711 tp->tx_ring[i - 1].buf_addr_2 = virt_to_bus (&tp->tx_ring[0]); 712 /* printf("[%d]buf1=%hX,buf2=%hX",i,tp->tx_ring[i-1].buf_addr_1,tp->tx_ring[i-1].buf_addr_2); */ 713} 714 715int 716QueryAuto (int ioaddr) 717{ 718 int byMIIIndex; 719 int MIIReturn; 720 721 int advertising,mii_reg5; 722 int negociated; 723 724 byMIIIndex = 0x04; 725 MIIReturn = ReadMII (byMIIIndex, ioaddr); 726 advertising=MIIReturn; 727 728 byMIIIndex = 0x05; 729 MIIReturn = ReadMII (byMIIIndex, ioaddr); 730 mii_reg5=MIIReturn; 731 732 negociated=mii_reg5 & advertising; 733 734 if ( (negociated & 0x100) || (negociated & 0x1C0) == 0x40 ) 735 return 1; 736 else 737 return 0; 738 739} 740 741int 742ReadMII (int byMIIIndex, int ioaddr) 743{ 744 int ReturnMII; 745 char byMIIAdrbak; 746 char byMIICRbak; 747 char byMIItemp; 748 749 byMIIAdrbak = inb (byMIIAD); 750 byMIICRbak = inb (byMIICR); 751 outb (byMIICRbak & 0x7f, byMIICR); 752 MIIDelay (); 753 754 outb (byMIIIndex, byMIIAD); 755 MIIDelay (); 756 757 outb (inb (byMIICR) | 0x40, byMIICR); 758 759 byMIItemp = inb (byMIICR); 760 byMIItemp = byMIItemp & 0x40; 761 762 while (byMIItemp != 0) 763 { 764 byMIItemp = inb (byMIICR); 765 byMIItemp = byMIItemp & 0x40; 766 } 767 MIIDelay (); 768 769 ReturnMII = inw (wMIIDATA); 770 771 outb (byMIIAdrbak, byMIIAD); 772 outb (byMIICRbak, byMIICR); 773 MIIDelay (); 774 775 return (ReturnMII); 776 777} 778 779void 780WriteMII (char byMIISetByte, char byMIISetBit, char byMIIOP, int ioaddr) 781{ 782 int ReadMIItmp; 783 int MIIMask; 784 char byMIIAdrbak; 785 char byMIICRbak; 786 char byMIItemp; 787 788 789 byMIIAdrbak = inb (byMIIAD); 790 791 byMIICRbak = inb (byMIICR); 792 outb (byMIICRbak & 0x7f, byMIICR); 793 MIIDelay (); 794 outb (byMIISetByte, byMIIAD); 795 MIIDelay (); 796 797 outb (inb (byMIICR) | 0x40, byMIICR); 798 799 byMIItemp = inb (byMIICR); 800 byMIItemp = byMIItemp & 0x40; 801 802 while (byMIItemp != 0) 803 { 804 byMIItemp = inb (byMIICR); 805 byMIItemp = byMIItemp & 0x40; 806 } 807 MIIDelay (); 808 809 ReadMIItmp = inw (wMIIDATA); 810 MIIMask = 0x0001; 811 MIIMask = MIIMask << byMIISetBit; 812 813 814 if (byMIIOP == 0) 815 { 816 MIIMask = ~MIIMask; 817 ReadMIItmp = ReadMIItmp & MIIMask; 818 } 819 else 820 { 821 ReadMIItmp = ReadMIItmp | MIIMask; 822 823 } 824 outw (ReadMIItmp, wMIIDATA); 825 MIIDelay (); 826 827 outb (inb (byMIICR) | 0x20, byMIICR); 828 byMIItemp = inb (byMIICR); 829 byMIItemp = byMIItemp & 0x20; 830 831 while (byMIItemp != 0) 832 { 833 byMIItemp = inb (byMIICR); 834 byMIItemp = byMIItemp & 0x20; 835 } 836 MIIDelay (); 837 838 outb (byMIIAdrbak & 0x7f, byMIIAD); 839 outb (byMIICRbak, byMIICR); 840 MIIDelay (); 841 842} 843 844void 845MIIDelay (void) 846{ 847 int i; 848 for (i = 0; i < 0x7fff; i++) 849 { 850 inb (0x61); 851 inb (0x61); 852 inb (0x61); 853 inb (0x61); 854 } 855} 856 857struct nic * 858rhine_probe (struct nic *nic, unsigned short *probeaddrs, 859 struct pci_device *pci) 860{ 861 if (!pci->ioaddr) 862 return NULL; 863 nic = rhine_probe1 (nic, pci->ioaddr, 0, -1); 864 865 if (nic) 866 adjust_pci_device(pci); 867 nic->poll = rhine_poll; 868 nic->transmit = rhine_transmit; 869 nic->reset = rhine_reset; 870 nic->disable = rhine_disable; 871 rhine_reset (nic); 872 873 return nic; 874} 875 876static struct nic * 877rhine_probe1 (struct nic *nic, int ioaddr, int chip_id, int options) 878{ 879 struct rhine_private *tp; 880 static int did_version = 0; /* Already printed version info. */ 881 int i; 882 unsigned int timeout; 883 int FDXFlag; 884 int byMIIvalue, LineSpeed, MIICRbak; 885 886 if (rhine_debug > 0 && did_version++ == 0) 887 printf (version); 888 /* Perhaps this should be read from the EEPROM? */ 889 for (i = 0; i < ETH_ALEN; i++) 890 nic->node_addr[i] = inb (byPAR0 + i); 891 printf ("IO address %hX Ethernet Address: %!\n", ioaddr, nic->node_addr); 892 893 /* restart MII auto-negotiation */ 894 WriteMII (0, 9, 1, ioaddr); 895 printf ("Analyzing Media type,this will take several seconds........"); 896 for (i = 0; i < 5; i++) 897 { 898 /* need to wait 1 millisecond - we will round it up to 50-100ms */ 899 timeout = currticks() + 2; 900 for (timeout = currticks() + 2; currticks() < timeout;) 901 /* nothing */; 902 if (ReadMII (1, ioaddr) & 0x0020) 903 break; 904 } 905 printf ("OK\n"); 906 907#if 0 908 /* JJM : for Debug */ 909 printf("MII : Address %hhX ",inb(ioaddr+0x6c)); 910 { 911 unsigned char st1,st2,adv1,adv2,l1,l2; 912 913 st1=ReadMII(1,ioaddr)>>8; 914 st2=ReadMII(1,ioaddr)&0xFF; 915 adv1=ReadMII(4,ioaddr)>>8; 916 adv2=ReadMII(4,ioaddr)&0xFF; 917 l1=ReadMII(5,ioaddr)>>8; 918 l2=ReadMII(5,ioaddr)&0xFF; 919 printf(" status 0x%hhX%hhX, advertising 0x%hhX%hhX, link 0x%hhX%hhX\n", st1,st2,adv1,adv2,l1,l2); 920 } 921#endif 922 923 /* query MII to know LineSpeed,duplex mode */ 924 byMIIvalue = inb (ioaddr + 0x6d); 925 LineSpeed = byMIIvalue & MIISR_SPEED; 926 if (LineSpeed != 0) //JJM 927 { 928 printf ("Linespeed=10Mbs"); 929 } 930 else 931 { 932 printf ("Linespeed=100Mbs"); 933 } 934 935 FDXFlag = QueryAuto (ioaddr); 936 if (FDXFlag == 1) 937 { 938 printf (" Fullduplex\n"); 939 outw (CR_FDX, byCR0); 940 } 941 else 942 { 943 printf (" Halfduplex\n"); 944 } 945 946 947 /* set MII 10 FULL ON */ 948 WriteMII (17, 1, 1, ioaddr); 949 950 /* turn on MII link change */ 951 MIICRbak = inb (byMIICR); 952 outb (MIICRbak & 0x7F, byMIICR); 953 MIIDelay (); 954 outb (0x41, byMIIAD); 955 MIIDelay (); 956 957 /* while((inb(byMIIAD)&0x20)==0) ; */ 958 outb (MIICRbak | 0x80, byMIICR); 959 960 nic->priv_data = &rhine; 961 tp = &rhine; 962 tp->chip_id = chip_id; 963 tp->ioaddr = ioaddr; 964 tp->phys[0] = -1; 965 966 /* The lower four bits are the media type. */ 967 if (options > 0) 968 { 969 tp->full_duplex = (options & 16) ? 1 : 0; 970 tp->default_port = options & 15; 971 if (tp->default_port) 972 tp->medialock = 1; 973 } 974 return nic; 975} 976 977static void 978rhine_disable (struct nic *nic) 979{ 980 struct rhine_private *tp = (struct rhine_private *) nic->priv_data; 981 int ioaddr = tp->ioaddr; 982 983 printf ("rhine disable\n"); 984 /* Switch to loopback mode to avoid hardware races. */ 985 writeb(0x60 | 0x01, byTCR); 986 /* Stop the chip's Tx and Rx processes. */ 987 writew(CR_STOP, byCR0); 988} 989 990/************************************************************************** 991ETH_RESET - Reset adapter 992***************************************************************************/ 993static void 994rhine_reset (struct nic *nic) 995{ 996 struct rhine_private *tp = (struct rhine_private *) nic->priv_data; 997 int ioaddr = tp->ioaddr; 998 int i, j; 999 int FDXFlag, CRbak; 1000 int rx_ring_tmp, rx_ring_tmp1; 1001 int tx_ring_tmp, tx_ring_tmp1; 1002 int rx_bufs_tmp, rx_bufs_tmp1; 1003 int tx_bufs_tmp, tx_bufs_tmp1; 1004 1005#ifdef USE_LOWMEM_BUFFER 1006#define buf1 (0x10000 - (RX_RING_SIZE * PKT_BUF_SZ + 32)) 1007#define buf2 (buf1 - (RX_RING_SIZE * PKT_BUF_SZ + 32)) 1008#define desc1 (buf2 - (TX_RING_SIZE * sizeof (struct rhine_tx_desc) + 32)) 1009#define desc2 (desc1 - (TX_RING_SIZE * sizeof (struct rhine_tx_desc) + 32)) 1010#else 1011 static char buf1[RX_RING_SIZE * PKT_BUF_SZ + 32]; 1012 static char buf2[RX_RING_SIZE * PKT_BUF_SZ + 32]; 1013 static char desc1[TX_RING_SIZE * sizeof (struct rhine_tx_desc) + 32]; 1014 static char desc2[TX_RING_SIZE * sizeof (struct rhine_tx_desc) + 32]; 1015#endif 1016 1017 /* printf ("rhine_reset\n"); */ 1018 /* Soft reset the chip. */ 1019 /*outb(CmdReset, ioaddr + ChipCmd); */ 1020 1021 tx_bufs_tmp = (int) buf1; 1022 tx_ring_tmp = (int) desc1; 1023 rx_bufs_tmp = (int) buf2; 1024 rx_ring_tmp = (int) desc2; 1025 1026 /* tune RD TD 32 byte alignment */ 1027 rx_ring_tmp1 = (int) virt_to_bus ((char *) rx_ring_tmp); 1028 j = (rx_ring_tmp1 + 32) & (~0x1f); 1029 /* printf ("txring[%d]", j); */ 1030 tp->rx_ring = (struct rhine_rx_desc *) bus_to_virt (j); 1031 1032 tx_ring_tmp1 = (int) virt_to_bus ((char *) tx_ring_tmp); 1033 j = (tx_ring_tmp1 + 32) & (~0x1f); 1034 tp->tx_ring = (struct rhine_tx_desc *) bus_to_virt (j); 1035 /* printf ("rxring[%X]", j); */ 1036 1037 1038 tx_bufs_tmp1 = (int) virt_to_bus ((char *) tx_bufs_tmp); 1039 j = (int) (tx_bufs_tmp1 + 32) & (~0x1f); 1040 tx_bufs_tmp = (int) bus_to_virt (j); 1041 /* printf ("txb[%X]", j); */ 1042 1043 rx_bufs_tmp1 = (int) virt_to_bus ((char *) rx_bufs_tmp); 1044 j = (int) (rx_bufs_tmp1 + 32) & (~0x1f); 1045 rx_bufs_tmp = (int) bus_to_virt (j); 1046 /* printf ("rxb[%X][%X]", rx_bufs_tmp1, j); */ 1047 1048 for (i = 0; i < RX_RING_SIZE; i++) 1049 { 1050 tp->rx_buffs[i] = (char *) rx_bufs_tmp; 1051 /* printf("r[%X]",tp->rx_buffs[i]); */ 1052 rx_bufs_tmp += 1536; 1053 } 1054 1055 for (i = 0; i < TX_RING_SIZE; i++) 1056 { 1057 tp->tx_buffs[i] = (char *) tx_bufs_tmp; 1058 /* printf("t[%X]",tp->tx_buffs[i]); */ 1059 tx_bufs_tmp += 1536; 1060 } 1061 1062 /* software reset */ 1063 outb (CR1_SFRST, byCR1); 1064 MIIDelay (); 1065 1066 /* printf ("init ring"); */ 1067 rhine_init_ring (nic); 1068 /*write TD RD Descriptor to MAC */ 1069 outl (virt_to_bus (tp->rx_ring), dwCurrentRxDescAddr); 1070 outl (virt_to_bus (tp->tx_ring), dwCurrentTxDescAddr); 1071 1072 /* close IMR */ 1073 outw (0x0000, byIMR0); 1074 1075 /* set TCR RCR threshold */ 1076 outb (0x06, byBCR0); 1077 outb (0x00, byBCR1); 1078 outb (0x2c, byRCR); 1079 outb (0x60, byTCR); 1080 /* Set Fulldupex */ 1081 FDXFlag = QueryAuto (ioaddr); 1082 if (FDXFlag == 1) 1083 { 1084 outb (CFGD_CFDX, byCFGD); 1085 outw (CR_FDX, byCR0); 1086 } 1087 1088 /* KICK NIC to WORK */ 1089 CRbak = inw (byCR0); 1090 CRbak = CRbak & 0xFFFB; /* not CR_STOP */ 1091 outw ((CRbak | CR_STRT | CR_TXON | CR_RXON | CR_DPOLL), byCR0); 1092 1093 /*set IMR to work */ 1094 outw (IMRShadow, byIMR0); 1095} 1096 1097static int 1098rhine_poll (struct nic *nic) 1099{ 1100 struct rhine_private *tp = (struct rhine_private *) nic->priv_data; 1101 int rxstatus, good = 0;; 1102 1103 if (tp->rx_ring[tp->cur_rx].rx_status.bits.own_bit == 0) 1104 { 1105 rxstatus = tp->rx_ring[tp->cur_rx].rx_status.lw; 1106 if ((rxstatus & 0x0300) != 0x0300) 1107 { 1108 printf("rhine_poll: bad status\n"); 1109 } 1110 else if (rxstatus & (RSR_ABNORMAL)) 1111 { 1112 printf ("rxerr[%X]\n", rxstatus); 1113 } 1114 else 1115 good = 1; 1116 1117 if (good) 1118 { 1119 nic->packetlen = tp->rx_ring[tp->cur_rx].rx_status.bits.frame_length; 1120 memcpy (nic->packet, tp->rx_buffs[tp->cur_rx], nic->packetlen); 1121 /* printf ("Packet RXed\n"); */ 1122 } 1123 tp->rx_ring[tp->cur_rx].rx_status.bits.own_bit = 1; 1124 tp->cur_rx++; 1125 tp->cur_rx = tp->cur_rx % RX_RING_SIZE; 1126 } 1127 return good; 1128} 1129 1130static void 1131rhine_transmit (struct nic *nic, 1132 const char *d, unsigned int t, unsigned int s, const char *p) 1133{ 1134 struct rhine_private *tp = (struct rhine_private *) nic->priv_data; 1135 int ioaddr = tp->ioaddr; 1136 int entry; 1137 unsigned char CR1bak; 1138 1139 /*printf ("rhine_transmit\n"); */ 1140 /* setup ethernet header */ 1141 1142 1143 /* Calculate the next Tx descriptor entry. */ 1144 entry = tp->cur_tx % TX_RING_SIZE; 1145 1146 memcpy (tp->tx_buffs[entry], d, ETH_ALEN); /* dst */ 1147 memcpy (tp->tx_buffs[entry] + ETH_ALEN, nic->node_addr, ETH_ALEN); /* src */ 1148 *((char *) tp->tx_buffs[entry] + 12) = t >> 8; /* type */ 1149 *((char *) tp->tx_buffs[entry] + 13) = t; 1150 memcpy (tp->tx_buffs[entry] + ETH_HLEN, p, s); 1151 s += ETH_HLEN; 1152 while (s < ETH_ZLEN) 1153 *((char *) tp->tx_buffs[entry] + ETH_HLEN + (s++)) = 0; 1154 1155 tp->tx_ring[entry].tx_ctrl.bits.tx_buf_size = ETH_HLEN + s; 1156 1157 tp->tx_ring[entry].tx_status.bits.own_bit = 1; 1158 1159 1160 CR1bak = inb (byCR1); 1161 1162 CR1bak = CR1bak | CR1_TDMD1; 1163 /*printf("tdsw=[%X]",tp->tx_ring[entry].tx_status.lw); */ 1164 /*printf("tdcw=[%X]",tp->tx_ring[entry].tx_ctrl.lw); */ 1165 /*printf("tdbuf1=[%X]",tp->tx_ring[entry].buf_addr_1); */ 1166 /*printf("tdbuf2=[%X]",tp->tx_ring[entry].buf_addr_2); */ 1167 /*printf("td1=[%X]",inl(dwCurrentTDSE0)); */ 1168 /*printf("td2=[%X]",inl(dwCurrentTDSE1)); */ 1169 /*printf("td3=[%X]",inl(dwCurrentTDSE2)); */ 1170 /*printf("td4=[%X]",inl(dwCurrentTDSE3)); */ 1171 1172 outb (CR1bak, byCR1); 1173 tp->cur_tx++; 1174 1175 /*outw(IMRShadow,byIMR0); */ 1176 /*dev_kfree_skb(tp->tx_skbuff[entry], FREE_WRITE); */ 1177 /*tp->tx_skbuff[entry] = 0; */ 1178} 1179 1180/* EOF via-rhine.c */ 1181