1 /* ---------------------------------------------------------------------------- 2 Linux PCMCIA ethernet adapter driver for the New Media Ethernet LAN. 3 nmclan_cs.c,v 0.16 1995/07/01 06:42:17 rpao Exp rpao 4 5 The Ethernet LAN uses the Advanced Micro Devices (AMD) Am79C940 Media 6 Access Controller for Ethernet (MACE). It is essentially the Am2150 7 PCMCIA Ethernet card contained in the Am2150 Demo Kit. 8 9 Written by Roger C. Pao <rpao@paonet.org> 10 Copyright 1995 Roger C. Pao 11 Linux 2.5 cleanups Copyright Red Hat 2003 12 13 This software may be used and distributed according to the terms of 14 the GNU General Public License. 15 16 Ported to Linux 1.3.* network driver environment by 17 Matti Aarnio <mea@utu.fi> 18 19 References 20 21 Am2150 Technical Reference Manual, Revision 1.0, August 17, 1993 22 Am79C940 (MACE) Data Sheet, 1994 23 Am79C90 (C-LANCE) Data Sheet, 1994 24 Linux PCMCIA Programmer's Guide v1.17 25 /usr/src/linux/net/inet/dev.c, Linux kernel 1.2.8 26 27 Eric Mears, New Media Corporation 28 Tom Pollard, New Media Corporation 29 Dean Siasoyco, New Media Corporation 30 Ken Lesniak, Silicon Graphics, Inc. <lesniak@boston.sgi.com> 31 Donald Becker <becker@scyld.com> 32 David Hinds <dahinds@users.sourceforge.net> 33 34 The Linux client driver is based on the 3c589_cs.c client driver by 35 David Hinds. 36 37 The Linux network driver outline is based on the 3c589_cs.c driver, 38 the 8390.c driver, and the example skeleton.c kernel code, which are 39 by Donald Becker. 40 41 The Am2150 network driver hardware interface code is based on the 42 OS/9000 driver for the New Media Ethernet LAN by Eric Mears. 43 44 Special thanks for testing and help in debugging this driver goes 45 to Ken Lesniak. 46 47 ------------------------------------------------------------------------------- 48 Driver Notes and Issues 49 ------------------------------------------------------------------------------- 50 51 1. Developed on a Dell 320SLi 52 PCMCIA Card Services 2.6.2 53 Linux dell 1.2.10 #1 Thu Jun 29 20:23:41 PDT 1995 i386 54 55 2. rc.pcmcia may require loading pcmcia_core with io_speed=300: 56 'insmod pcmcia_core.o io_speed=300'. 57 This will avoid problems with fast systems which causes rx_framecnt 58 to return random values. 59 60 3. If hot extraction does not work for you, use 'ifconfig eth0 down' 61 before extraction. 62 63 4. There is a bad slow-down problem in this driver. 64 65 5. Future: Multicast processing. In the meantime, do _not_ compile your 66 kernel with multicast ip enabled. 67 68 ------------------------------------------------------------------------------- 69 History 70 ------------------------------------------------------------------------------- 71 Log: nmclan_cs.c,v 72 * 2.5.75-ac1 2003/07/11 Alan Cox <alan@lxorguk.ukuu.org.uk> 73 * Fixed hang on card eject as we probe it 74 * Cleaned up to use new style locking. 75 * 76 * Revision 0.16 1995/07/01 06:42:17 rpao 77 * Bug fix: nmclan_reset() called CardServices incorrectly. 78 * 79 * Revision 0.15 1995/05/24 08:09:47 rpao 80 * Re-implement MULTI_TX dev->tbusy handling. 81 * 82 * Revision 0.14 1995/05/23 03:19:30 rpao 83 * Added, in nmclan_config(), "tuple.Attributes = 0;". 84 * Modified MACE ID check to ignore chip revision level. 85 * Avoid tx_free_frames race condition between _start_xmit and _interrupt. 86 * 87 * Revision 0.13 1995/05/18 05:56:34 rpao 88 * Statistics changes. 89 * Bug fix: nmclan_reset did not enable TX and RX: call restore_multicast_list. 90 * Bug fix: mace_interrupt checks ~MACE_IMR_DEFAULT. Fixes driver lockup. 91 * 92 * Revision 0.12 1995/05/14 00:12:23 rpao 93 * Statistics overhaul. 94 * 95 96 95/05/13 rpao V0.10a 97 Bug fix: MACE statistics counters used wrong I/O ports. 98 Bug fix: mace_interrupt() needed to allow statistics to be 99 processed without RX or TX interrupts pending. 100 95/05/11 rpao V0.10 101 Multiple transmit request processing. 102 Modified statistics to use MACE counters where possible. 103 95/05/10 rpao V0.09 Bug fix: Must use IO_DATA_PATH_WIDTH_AUTO. 104 *Released 105 95/05/10 rpao V0.08 106 Bug fix: Make all non-exported functions private by using 107 static keyword. 108 Bug fix: Test IntrCnt _before_ reading MACE_IR. 109 95/05/10 rpao V0.07 Statistics. 110 95/05/09 rpao V0.06 Fix rx_framecnt problem by addition of PCIC wait states. 111 112 ---------------------------------------------------------------------------- */ 113 114 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 115 116 #define DRV_NAME "nmclan_cs" 117 118 /* ---------------------------------------------------------------------------- 119 Conditional Compilation Options 120 ---------------------------------------------------------------------------- */ 121 122 #define MULTI_TX 0 123 #define RESET_ON_TIMEOUT 1 124 #define TX_INTERRUPTABLE 1 125 #define RESET_XILINX 0 126 127 /* ---------------------------------------------------------------------------- 128 Include Files 129 ---------------------------------------------------------------------------- */ 130 131 #include <linux/module.h> 132 #include <linux/kernel.h> 133 #include <linux/ptrace.h> 134 #include <linux/slab.h> 135 #include <linux/string.h> 136 #include <linux/timer.h> 137 #include <linux/interrupt.h> 138 #include <linux/in.h> 139 #include <linux/delay.h> 140 #include <linux/ethtool.h> 141 #include <linux/netdevice.h> 142 #include <linux/etherdevice.h> 143 #include <linux/skbuff.h> 144 #include <linux/if_arp.h> 145 #include <linux/ioport.h> 146 #include <linux/bitops.h> 147 148 #include <pcmcia/cisreg.h> 149 #include <pcmcia/cistpl.h> 150 #include <pcmcia/ds.h> 151 152 #include <linux/uaccess.h> 153 #include <asm/io.h> 154 155 /* ---------------------------------------------------------------------------- 156 Defines 157 ---------------------------------------------------------------------------- */ 158 159 #define MACE_LADRF_LEN 8 160 /* 8 bytes in Logical Address Filter */ 161 162 /* Loop Control Defines */ 163 #define MACE_MAX_IR_ITERATIONS 10 164 #define MACE_MAX_RX_ITERATIONS 12 165 /* 166 TBD: Dean brought this up, and I assumed the hardware would 167 handle it: 168 169 If MACE_MAX_RX_ITERATIONS is > 1, rx_framecnt may still be 170 non-zero when the isr exits. We may not get another interrupt 171 to process the remaining packets for some time. 172 */ 173 174 /* 175 The Am2150 has a Xilinx XC3042 field programmable gate array (FPGA) 176 which manages the interface between the MACE and the PCMCIA bus. It 177 also includes buffer management for the 32K x 8 SRAM to control up to 178 four transmit and 12 receive frames at a time. 179 */ 180 #define AM2150_MAX_TX_FRAMES 4 181 #define AM2150_MAX_RX_FRAMES 12 182 183 /* Am2150 Ethernet Card I/O Mapping */ 184 #define AM2150_RCV 0x00 185 #define AM2150_XMT 0x04 186 #define AM2150_XMT_SKIP 0x09 187 #define AM2150_RCV_NEXT 0x0A 188 #define AM2150_RCV_FRAME_COUNT 0x0B 189 #define AM2150_MACE_BANK 0x0C 190 #define AM2150_MACE_BASE 0x10 191 192 /* MACE Registers */ 193 #define MACE_RCVFIFO 0 194 #define MACE_XMTFIFO 1 195 #define MACE_XMTFC 2 196 #define MACE_XMTFS 3 197 #define MACE_XMTRC 4 198 #define MACE_RCVFC 5 199 #define MACE_RCVFS 6 200 #define MACE_FIFOFC 7 201 #define MACE_IR 8 202 #define MACE_IMR 9 203 #define MACE_PR 10 204 #define MACE_BIUCC 11 205 #define MACE_FIFOCC 12 206 #define MACE_MACCC 13 207 #define MACE_PLSCC 14 208 #define MACE_PHYCC 15 209 #define MACE_CHIPIDL 16 210 #define MACE_CHIPIDH 17 211 #define MACE_IAC 18 212 /* Reserved */ 213 #define MACE_LADRF 20 214 #define MACE_PADR 21 215 /* Reserved */ 216 /* Reserved */ 217 #define MACE_MPC 24 218 /* Reserved */ 219 #define MACE_RNTPC 26 220 #define MACE_RCVCC 27 221 /* Reserved */ 222 #define MACE_UTR 29 223 #define MACE_RTR1 30 224 #define MACE_RTR2 31 225 226 /* MACE Bit Masks */ 227 #define MACE_XMTRC_EXDEF 0x80 228 #define MACE_XMTRC_XMTRC 0x0F 229 230 #define MACE_XMTFS_XMTSV 0x80 231 #define MACE_XMTFS_UFLO 0x40 232 #define MACE_XMTFS_LCOL 0x20 233 #define MACE_XMTFS_MORE 0x10 234 #define MACE_XMTFS_ONE 0x08 235 #define MACE_XMTFS_DEFER 0x04 236 #define MACE_XMTFS_LCAR 0x02 237 #define MACE_XMTFS_RTRY 0x01 238 239 #define MACE_RCVFS_RCVSTS 0xF000 240 #define MACE_RCVFS_OFLO 0x8000 241 #define MACE_RCVFS_CLSN 0x4000 242 #define MACE_RCVFS_FRAM 0x2000 243 #define MACE_RCVFS_FCS 0x1000 244 245 #define MACE_FIFOFC_RCVFC 0xF0 246 #define MACE_FIFOFC_XMTFC 0x0F 247 248 #define MACE_IR_JAB 0x80 249 #define MACE_IR_BABL 0x40 250 #define MACE_IR_CERR 0x20 251 #define MACE_IR_RCVCCO 0x10 252 #define MACE_IR_RNTPCO 0x08 253 #define MACE_IR_MPCO 0x04 254 #define MACE_IR_RCVINT 0x02 255 #define MACE_IR_XMTINT 0x01 256 257 #define MACE_MACCC_PROM 0x80 258 #define MACE_MACCC_DXMT2PD 0x40 259 #define MACE_MACCC_EMBA 0x20 260 #define MACE_MACCC_RESERVED 0x10 261 #define MACE_MACCC_DRCVPA 0x08 262 #define MACE_MACCC_DRCVBC 0x04 263 #define MACE_MACCC_ENXMT 0x02 264 #define MACE_MACCC_ENRCV 0x01 265 266 #define MACE_PHYCC_LNKFL 0x80 267 #define MACE_PHYCC_DLNKTST 0x40 268 #define MACE_PHYCC_REVPOL 0x20 269 #define MACE_PHYCC_DAPC 0x10 270 #define MACE_PHYCC_LRT 0x08 271 #define MACE_PHYCC_ASEL 0x04 272 #define MACE_PHYCC_RWAKE 0x02 273 #define MACE_PHYCC_AWAKE 0x01 274 275 #define MACE_IAC_ADDRCHG 0x80 276 #define MACE_IAC_PHYADDR 0x04 277 #define MACE_IAC_LOGADDR 0x02 278 279 #define MACE_UTR_RTRE 0x80 280 #define MACE_UTR_RTRD 0x40 281 #define MACE_UTR_RPA 0x20 282 #define MACE_UTR_FCOLL 0x10 283 #define MACE_UTR_RCVFCSE 0x08 284 #define MACE_UTR_LOOP_INCL_MENDEC 0x06 285 #define MACE_UTR_LOOP_NO_MENDEC 0x04 286 #define MACE_UTR_LOOP_EXTERNAL 0x02 287 #define MACE_UTR_LOOP_NONE 0x00 288 #define MACE_UTR_RESERVED 0x01 289 290 /* Switch MACE register bank (only 0 and 1 are valid) */ 291 #define MACEBANK(win_num) outb((win_num), ioaddr + AM2150_MACE_BANK) 292 293 #define MACE_IMR_DEFAULT \ 294 (0xFF - \ 295 ( \ 296 MACE_IR_CERR | \ 297 MACE_IR_RCVCCO | \ 298 MACE_IR_RNTPCO | \ 299 MACE_IR_MPCO | \ 300 MACE_IR_RCVINT | \ 301 MACE_IR_XMTINT \ 302 ) \ 303 ) 304 #undef MACE_IMR_DEFAULT 305 #define MACE_IMR_DEFAULT 0x00 /* New statistics handling: grab everything */ 306 307 #define TX_TIMEOUT ((400*HZ)/1000) 308 309 /* ---------------------------------------------------------------------------- 310 Type Definitions 311 ---------------------------------------------------------------------------- */ 312 313 typedef struct _mace_statistics { 314 /* MACE_XMTFS */ 315 int xmtsv; 316 int uflo; 317 int lcol; 318 int more; 319 int one; 320 int defer; 321 int lcar; 322 int rtry; 323 324 /* MACE_XMTRC */ 325 int exdef; 326 int xmtrc; 327 328 /* RFS1--Receive Status (RCVSTS) */ 329 int oflo; 330 int clsn; 331 int fram; 332 int fcs; 333 334 /* RFS2--Runt Packet Count (RNTPC) */ 335 int rfs_rntpc; 336 337 /* RFS3--Receive Collision Count (RCVCC) */ 338 int rfs_rcvcc; 339 340 /* MACE_IR */ 341 int jab; 342 int babl; 343 int cerr; 344 int rcvcco; 345 int rntpco; 346 int mpco; 347 348 /* MACE_MPC */ 349 int mpc; 350 351 /* MACE_RNTPC */ 352 int rntpc; 353 354 /* MACE_RCVCC */ 355 int rcvcc; 356 } mace_statistics; 357 358 typedef struct _mace_private { 359 struct pcmcia_device *p_dev; 360 mace_statistics mace_stats; /* MACE chip statistics counters */ 361 362 /* restore_multicast_list() state variables */ 363 int multicast_ladrf[MACE_LADRF_LEN]; /* Logical address filter */ 364 int multicast_num_addrs; 365 366 char tx_free_frames; /* Number of free transmit frame buffers */ 367 char tx_irq_disabled; /* MACE TX interrupt disabled */ 368 369 spinlock_t bank_lock; /* Must be held if you step off bank 0 */ 370 } mace_private; 371 372 /* ---------------------------------------------------------------------------- 373 Private Global Variables 374 ---------------------------------------------------------------------------- */ 375 376 static const char *if_names[]={ 377 "Auto", "10baseT", "BNC", 378 }; 379 380 /* ---------------------------------------------------------------------------- 381 Parameters 382 These are the parameters that can be set during loading with 383 'insmod'. 384 ---------------------------------------------------------------------------- */ 385 386 MODULE_DESCRIPTION("New Media PCMCIA ethernet driver"); 387 MODULE_LICENSE("GPL"); 388 389 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) 390 391 /* 0=auto, 1=10baseT, 2 = 10base2, default=auto */ 392 INT_MODULE_PARM(if_port, 0); 393 394 395 /* ---------------------------------------------------------------------------- 396 Function Prototypes 397 ---------------------------------------------------------------------------- */ 398 399 static int nmclan_config(struct pcmcia_device *link); 400 static void nmclan_release(struct pcmcia_device *link); 401 402 static void nmclan_reset(struct net_device *dev); 403 static int mace_config(struct net_device *dev, struct ifmap *map); 404 static int mace_open(struct net_device *dev); 405 static int mace_close(struct net_device *dev); 406 static netdev_tx_t mace_start_xmit(struct sk_buff *skb, 407 struct net_device *dev); 408 static void mace_tx_timeout(struct net_device *dev, unsigned int txqueue); 409 static irqreturn_t mace_interrupt(int irq, void *dev_id); 410 static struct net_device_stats *mace_get_stats(struct net_device *dev); 411 static int mace_rx(struct net_device *dev, unsigned char RxCnt); 412 static void restore_multicast_list(struct net_device *dev); 413 static void set_multicast_list(struct net_device *dev); 414 static const struct ethtool_ops netdev_ethtool_ops; 415 416 417 static void nmclan_detach(struct pcmcia_device *p_dev); 418 419 static const struct net_device_ops mace_netdev_ops = { 420 .ndo_open = mace_open, 421 .ndo_stop = mace_close, 422 .ndo_start_xmit = mace_start_xmit, 423 .ndo_tx_timeout = mace_tx_timeout, 424 .ndo_set_config = mace_config, 425 .ndo_get_stats = mace_get_stats, 426 .ndo_set_rx_mode = set_multicast_list, 427 .ndo_set_mac_address = eth_mac_addr, 428 .ndo_validate_addr = eth_validate_addr, 429 }; 430 nmclan_probe(struct pcmcia_device * link)431 static int nmclan_probe(struct pcmcia_device *link) 432 { 433 mace_private *lp; 434 struct net_device *dev; 435 436 dev_dbg(&link->dev, "nmclan_attach()\n"); 437 438 /* Create new ethernet device */ 439 dev = alloc_etherdev(sizeof(mace_private)); 440 if (!dev) 441 return -ENOMEM; 442 lp = netdev_priv(dev); 443 lp->p_dev = link; 444 link->priv = dev; 445 446 spin_lock_init(&lp->bank_lock); 447 link->resource[0]->end = 32; 448 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO; 449 link->config_flags |= CONF_ENABLE_IRQ; 450 link->config_index = 1; 451 link->config_regs = PRESENT_OPTION; 452 453 lp->tx_free_frames=AM2150_MAX_TX_FRAMES; 454 455 dev->netdev_ops = &mace_netdev_ops; 456 dev->ethtool_ops = &netdev_ethtool_ops; 457 dev->watchdog_timeo = TX_TIMEOUT; 458 459 return nmclan_config(link); 460 } /* nmclan_attach */ 461 nmclan_detach(struct pcmcia_device * link)462 static void nmclan_detach(struct pcmcia_device *link) 463 { 464 struct net_device *dev = link->priv; 465 466 dev_dbg(&link->dev, "nmclan_detach\n"); 467 468 unregister_netdev(dev); 469 470 nmclan_release(link); 471 472 free_netdev(dev); 473 } /* nmclan_detach */ 474 475 /* ---------------------------------------------------------------------------- 476 mace_read 477 Reads a MACE register. This is bank independent; however, the 478 caller must ensure that this call is not interruptable. We are 479 assuming that during normal operation, the MACE is always in 480 bank 0. 481 ---------------------------------------------------------------------------- */ mace_read(mace_private * lp,unsigned int ioaddr,int reg)482 static int mace_read(mace_private *lp, unsigned int ioaddr, int reg) 483 { 484 int data = 0xFF; 485 unsigned long flags; 486 487 switch (reg >> 4) { 488 case 0: /* register 0-15 */ 489 data = inb(ioaddr + AM2150_MACE_BASE + reg); 490 break; 491 case 1: /* register 16-31 */ 492 spin_lock_irqsave(&lp->bank_lock, flags); 493 MACEBANK(1); 494 data = inb(ioaddr + AM2150_MACE_BASE + (reg & 0x0F)); 495 MACEBANK(0); 496 spin_unlock_irqrestore(&lp->bank_lock, flags); 497 break; 498 } 499 return data & 0xFF; 500 } /* mace_read */ 501 502 /* ---------------------------------------------------------------------------- 503 mace_write 504 Writes to a MACE register. This is bank independent; however, 505 the caller must ensure that this call is not interruptable. We 506 are assuming that during normal operation, the MACE is always in 507 bank 0. 508 ---------------------------------------------------------------------------- */ mace_write(mace_private * lp,unsigned int ioaddr,int reg,int data)509 static void mace_write(mace_private *lp, unsigned int ioaddr, int reg, 510 int data) 511 { 512 unsigned long flags; 513 514 switch (reg >> 4) { 515 case 0: /* register 0-15 */ 516 outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + reg); 517 break; 518 case 1: /* register 16-31 */ 519 spin_lock_irqsave(&lp->bank_lock, flags); 520 MACEBANK(1); 521 outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + (reg & 0x0F)); 522 MACEBANK(0); 523 spin_unlock_irqrestore(&lp->bank_lock, flags); 524 break; 525 } 526 } /* mace_write */ 527 528 /* ---------------------------------------------------------------------------- 529 mace_init 530 Resets the MACE chip. 531 ---------------------------------------------------------------------------- */ mace_init(mace_private * lp,unsigned int ioaddr,const char * enet_addr)532 static int mace_init(mace_private *lp, unsigned int ioaddr, 533 const char *enet_addr) 534 { 535 int i; 536 int ct = 0; 537 538 /* MACE Software reset */ 539 mace_write(lp, ioaddr, MACE_BIUCC, 1); 540 while (mace_read(lp, ioaddr, MACE_BIUCC) & 0x01) { 541 /* Wait for reset bit to be cleared automatically after <= 200ns */; 542 if(++ct > 500) 543 { 544 pr_err("reset failed, card removed?\n"); 545 return -1; 546 } 547 udelay(1); 548 } 549 mace_write(lp, ioaddr, MACE_BIUCC, 0); 550 551 /* The Am2150 requires that the MACE FIFOs operate in burst mode. */ 552 mace_write(lp, ioaddr, MACE_FIFOCC, 0x0F); 553 554 mace_write(lp,ioaddr, MACE_RCVFC, 0); /* Disable Auto Strip Receive */ 555 mace_write(lp, ioaddr, MACE_IMR, 0xFF); /* Disable all interrupts until _open */ 556 557 /* 558 * Bit 2-1 PORTSEL[1-0] Port Select. 559 * 00 AUI/10Base-2 560 * 01 10Base-T 561 * 10 DAI Port (reserved in Am2150) 562 * 11 GPSI 563 * For this card, only the first two are valid. 564 * So, PLSCC should be set to 565 * 0x00 for 10Base-2 566 * 0x02 for 10Base-T 567 * Or just set ASEL in PHYCC below! 568 */ 569 switch (if_port) { 570 case 1: 571 mace_write(lp, ioaddr, MACE_PLSCC, 0x02); 572 break; 573 case 2: 574 mace_write(lp, ioaddr, MACE_PLSCC, 0x00); 575 break; 576 default: 577 mace_write(lp, ioaddr, MACE_PHYCC, /* ASEL */ 4); 578 /* ASEL Auto Select. When set, the PORTSEL[1-0] bits are overridden, 579 and the MACE device will automatically select the operating media 580 interface port. */ 581 break; 582 } 583 584 mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_PHYADDR); 585 /* Poll ADDRCHG bit */ 586 ct = 0; 587 while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG) 588 { 589 if(++ ct > 500) 590 { 591 pr_err("ADDRCHG timeout, card removed?\n"); 592 return -1; 593 } 594 } 595 /* Set PADR register */ 596 for (i = 0; i < ETH_ALEN; i++) 597 mace_write(lp, ioaddr, MACE_PADR, enet_addr[i]); 598 599 /* MAC Configuration Control Register should be written last */ 600 /* Let set_multicast_list set this. */ 601 /* mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV); */ 602 mace_write(lp, ioaddr, MACE_MACCC, 0x00); 603 return 0; 604 } /* mace_init */ 605 nmclan_config(struct pcmcia_device * link)606 static int nmclan_config(struct pcmcia_device *link) 607 { 608 struct net_device *dev = link->priv; 609 mace_private *lp = netdev_priv(dev); 610 u8 *buf; 611 size_t len; 612 int i, ret; 613 unsigned int ioaddr; 614 615 dev_dbg(&link->dev, "nmclan_config\n"); 616 617 link->io_lines = 5; 618 ret = pcmcia_request_io(link); 619 if (ret) 620 goto failed; 621 ret = pcmcia_request_irq(link, mace_interrupt); 622 if (ret) 623 goto failed; 624 ret = pcmcia_enable_device(link); 625 if (ret) 626 goto failed; 627 628 dev->irq = link->irq; 629 dev->base_addr = link->resource[0]->start; 630 631 ioaddr = dev->base_addr; 632 633 /* Read the ethernet address from the CIS. */ 634 len = pcmcia_get_tuple(link, 0x80, &buf); 635 if (!buf || len < ETH_ALEN) { 636 kfree(buf); 637 goto failed; 638 } 639 eth_hw_addr_set(dev, buf); 640 kfree(buf); 641 642 /* Verify configuration by reading the MACE ID. */ 643 { 644 char sig[2]; 645 646 sig[0] = mace_read(lp, ioaddr, MACE_CHIPIDL); 647 sig[1] = mace_read(lp, ioaddr, MACE_CHIPIDH); 648 if ((sig[0] == 0x40) && ((sig[1] & 0x0F) == 0x09)) { 649 dev_dbg(&link->dev, "nmclan_cs configured: mace id=%x %x\n", 650 sig[0], sig[1]); 651 } else { 652 pr_notice("mace id not found: %x %x should be 0x40 0x?9\n", 653 sig[0], sig[1]); 654 goto failed; 655 } 656 } 657 658 if(mace_init(lp, ioaddr, dev->dev_addr) == -1) 659 goto failed; 660 661 /* The if_port symbol can be set when the module is loaded */ 662 if (if_port <= 2) 663 dev->if_port = if_port; 664 else 665 pr_notice("invalid if_port requested\n"); 666 667 SET_NETDEV_DEV(dev, &link->dev); 668 669 i = register_netdev(dev); 670 if (i != 0) { 671 pr_notice("register_netdev() failed\n"); 672 goto failed; 673 } 674 675 netdev_info(dev, "nmclan: port %#3lx, irq %d, %s port, hw_addr %pM\n", 676 dev->base_addr, dev->irq, if_names[dev->if_port], dev->dev_addr); 677 return 0; 678 679 failed: 680 nmclan_release(link); 681 return -ENODEV; 682 } /* nmclan_config */ 683 nmclan_release(struct pcmcia_device * link)684 static void nmclan_release(struct pcmcia_device *link) 685 { 686 dev_dbg(&link->dev, "nmclan_release\n"); 687 pcmcia_disable_device(link); 688 } 689 nmclan_suspend(struct pcmcia_device * link)690 static int nmclan_suspend(struct pcmcia_device *link) 691 { 692 struct net_device *dev = link->priv; 693 694 if (link->open) 695 netif_device_detach(dev); 696 697 return 0; 698 } 699 nmclan_resume(struct pcmcia_device * link)700 static int nmclan_resume(struct pcmcia_device *link) 701 { 702 struct net_device *dev = link->priv; 703 704 if (link->open) { 705 nmclan_reset(dev); 706 netif_device_attach(dev); 707 } 708 709 return 0; 710 } 711 712 713 /* ---------------------------------------------------------------------------- 714 nmclan_reset 715 Reset and restore all of the Xilinx and MACE registers. 716 ---------------------------------------------------------------------------- */ nmclan_reset(struct net_device * dev)717 static void nmclan_reset(struct net_device *dev) 718 { 719 mace_private *lp = netdev_priv(dev); 720 721 #if RESET_XILINX 722 struct pcmcia_device *link = &lp->link; 723 u8 OrigCorValue; 724 725 /* Save original COR value */ 726 pcmcia_read_config_byte(link, CISREG_COR, &OrigCorValue); 727 728 /* Reset Xilinx */ 729 dev_dbg(&link->dev, "nmclan_reset: OrigCorValue=0x%x, resetting...\n", 730 OrigCorValue); 731 pcmcia_write_config_byte(link, CISREG_COR, COR_SOFT_RESET); 732 /* Need to wait for 20 ms for PCMCIA to finish reset. */ 733 734 /* Restore original COR configuration index */ 735 pcmcia_write_config_byte(link, CISREG_COR, 736 (COR_LEVEL_REQ | (OrigCorValue & COR_CONFIG_MASK))); 737 /* Xilinx is now completely reset along with the MACE chip. */ 738 lp->tx_free_frames=AM2150_MAX_TX_FRAMES; 739 740 #endif /* #if RESET_XILINX */ 741 742 /* Xilinx is now completely reset along with the MACE chip. */ 743 lp->tx_free_frames=AM2150_MAX_TX_FRAMES; 744 745 /* Reinitialize the MACE chip for operation. */ 746 mace_init(lp, dev->base_addr, dev->dev_addr); 747 mace_write(lp, dev->base_addr, MACE_IMR, MACE_IMR_DEFAULT); 748 749 /* Restore the multicast list and enable TX and RX. */ 750 restore_multicast_list(dev); 751 } /* nmclan_reset */ 752 753 /* ---------------------------------------------------------------------------- 754 mace_config 755 [Someone tell me what this is supposed to do? Is if_port a defined 756 standard? If so, there should be defines to indicate 1=10Base-T, 757 2=10Base-2, etc. including limited automatic detection.] 758 ---------------------------------------------------------------------------- */ mace_config(struct net_device * dev,struct ifmap * map)759 static int mace_config(struct net_device *dev, struct ifmap *map) 760 { 761 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) { 762 if (map->port <= 2) { 763 dev->if_port = map->port; 764 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]); 765 } else 766 return -EINVAL; 767 } 768 return 0; 769 } /* mace_config */ 770 771 /* ---------------------------------------------------------------------------- 772 mace_open 773 Open device driver. 774 ---------------------------------------------------------------------------- */ mace_open(struct net_device * dev)775 static int mace_open(struct net_device *dev) 776 { 777 unsigned int ioaddr = dev->base_addr; 778 mace_private *lp = netdev_priv(dev); 779 struct pcmcia_device *link = lp->p_dev; 780 781 if (!pcmcia_dev_present(link)) 782 return -ENODEV; 783 784 link->open++; 785 786 MACEBANK(0); 787 788 netif_start_queue(dev); 789 nmclan_reset(dev); 790 791 return 0; /* Always succeed */ 792 } /* mace_open */ 793 794 /* ---------------------------------------------------------------------------- 795 mace_close 796 Closes device driver. 797 ---------------------------------------------------------------------------- */ mace_close(struct net_device * dev)798 static int mace_close(struct net_device *dev) 799 { 800 unsigned int ioaddr = dev->base_addr; 801 mace_private *lp = netdev_priv(dev); 802 struct pcmcia_device *link = lp->p_dev; 803 804 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name); 805 806 /* Mask off all interrupts from the MACE chip. */ 807 outb(0xFF, ioaddr + AM2150_MACE_BASE + MACE_IMR); 808 809 link->open--; 810 netif_stop_queue(dev); 811 812 return 0; 813 } /* mace_close */ 814 netdev_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)815 static void netdev_get_drvinfo(struct net_device *dev, 816 struct ethtool_drvinfo *info) 817 { 818 strscpy(info->driver, DRV_NAME, sizeof(info->driver)); 819 snprintf(info->bus_info, sizeof(info->bus_info), 820 "PCMCIA 0x%lx", dev->base_addr); 821 } 822 823 static const struct ethtool_ops netdev_ethtool_ops = { 824 .get_drvinfo = netdev_get_drvinfo, 825 }; 826 827 /* ---------------------------------------------------------------------------- 828 mace_start_xmit 829 This routine begins the packet transmit function. When completed, 830 it will generate a transmit interrupt. 831 832 According to /usr/src/linux/net/inet/dev.c, if _start_xmit 833 returns 0, the "packet is now solely the responsibility of the 834 driver." If _start_xmit returns non-zero, the "transmission 835 failed, put skb back into a list." 836 ---------------------------------------------------------------------------- */ 837 mace_tx_timeout(struct net_device * dev,unsigned int txqueue)838 static void mace_tx_timeout(struct net_device *dev, unsigned int txqueue) 839 { 840 mace_private *lp = netdev_priv(dev); 841 struct pcmcia_device *link = lp->p_dev; 842 843 netdev_notice(dev, "transmit timed out -- "); 844 #if RESET_ON_TIMEOUT 845 pr_cont("resetting card\n"); 846 pcmcia_reset_card(link->socket); 847 #else /* #if RESET_ON_TIMEOUT */ 848 pr_cont("NOT resetting card\n"); 849 #endif /* #if RESET_ON_TIMEOUT */ 850 netif_trans_update(dev); /* prevent tx timeout */ 851 netif_wake_queue(dev); 852 } 853 mace_start_xmit(struct sk_buff * skb,struct net_device * dev)854 static netdev_tx_t mace_start_xmit(struct sk_buff *skb, 855 struct net_device *dev) 856 { 857 mace_private *lp = netdev_priv(dev); 858 unsigned int ioaddr = dev->base_addr; 859 860 netif_stop_queue(dev); 861 862 pr_debug("%s: mace_start_xmit(length = %ld) called.\n", 863 dev->name, (long)skb->len); 864 865 #if (!TX_INTERRUPTABLE) 866 /* Disable MACE TX interrupts. */ 867 outb(MACE_IMR_DEFAULT | MACE_IR_XMTINT, 868 ioaddr + AM2150_MACE_BASE + MACE_IMR); 869 lp->tx_irq_disabled=1; 870 #endif /* #if (!TX_INTERRUPTABLE) */ 871 872 { 873 /* This block must not be interrupted by another transmit request! 874 mace_tx_timeout will take care of timer-based retransmissions from 875 the upper layers. The interrupt handler is guaranteed never to 876 service a transmit interrupt while we are in here. 877 */ 878 879 dev->stats.tx_bytes += skb->len; 880 lp->tx_free_frames--; 881 882 /* WARNING: Write the _exact_ number of bytes written in the header! */ 883 /* Put out the word header [must be an outw()] . . . */ 884 outw(skb->len, ioaddr + AM2150_XMT); 885 /* . . . and the packet [may be any combination of outw() and outb()] */ 886 outsw(ioaddr + AM2150_XMT, skb->data, skb->len >> 1); 887 if (skb->len & 1) { 888 /* Odd byte transfer */ 889 outb(skb->data[skb->len-1], ioaddr + AM2150_XMT); 890 } 891 892 #if MULTI_TX 893 if (lp->tx_free_frames > 0) 894 netif_start_queue(dev); 895 #endif /* #if MULTI_TX */ 896 } 897 898 #if (!TX_INTERRUPTABLE) 899 /* Re-enable MACE TX interrupts. */ 900 lp->tx_irq_disabled=0; 901 outb(MACE_IMR_DEFAULT, ioaddr + AM2150_MACE_BASE + MACE_IMR); 902 #endif /* #if (!TX_INTERRUPTABLE) */ 903 904 dev_kfree_skb(skb); 905 906 return NETDEV_TX_OK; 907 } /* mace_start_xmit */ 908 909 /* ---------------------------------------------------------------------------- 910 mace_interrupt 911 The interrupt handler. 912 ---------------------------------------------------------------------------- */ mace_interrupt(int irq,void * dev_id)913 static irqreturn_t mace_interrupt(int irq, void *dev_id) 914 { 915 struct net_device *dev = (struct net_device *) dev_id; 916 mace_private *lp = netdev_priv(dev); 917 unsigned int ioaddr; 918 int status; 919 int IntrCnt = MACE_MAX_IR_ITERATIONS; 920 921 if (!dev) { 922 pr_debug("mace_interrupt(): irq 0x%X for unknown device.\n", 923 irq); 924 return IRQ_NONE; 925 } 926 927 ioaddr = dev->base_addr; 928 929 if (lp->tx_irq_disabled) { 930 const char *msg; 931 if (lp->tx_irq_disabled) 932 msg = "Interrupt with tx_irq_disabled"; 933 else 934 msg = "Re-entering the interrupt handler"; 935 netdev_notice(dev, "%s [isr=%02X, imr=%02X]\n", 936 msg, 937 inb(ioaddr + AM2150_MACE_BASE + MACE_IR), 938 inb(ioaddr + AM2150_MACE_BASE + MACE_IMR)); 939 /* WARNING: MACE_IR has been read! */ 940 return IRQ_NONE; 941 } 942 943 if (!netif_device_present(dev)) { 944 netdev_dbg(dev, "interrupt from dead card\n"); 945 return IRQ_NONE; 946 } 947 948 do { 949 /* WARNING: MACE_IR is a READ/CLEAR port! */ 950 status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR); 951 if (!(status & ~MACE_IMR_DEFAULT) && IntrCnt == MACE_MAX_IR_ITERATIONS) 952 return IRQ_NONE; 953 954 pr_debug("mace_interrupt: irq 0x%X status 0x%X.\n", irq, status); 955 956 if (status & MACE_IR_RCVINT) { 957 mace_rx(dev, MACE_MAX_RX_ITERATIONS); 958 } 959 960 if (status & MACE_IR_XMTINT) { 961 unsigned char fifofc; 962 unsigned char xmtrc; 963 unsigned char xmtfs; 964 965 fifofc = inb(ioaddr + AM2150_MACE_BASE + MACE_FIFOFC); 966 if ((fifofc & MACE_FIFOFC_XMTFC)==0) { 967 dev->stats.tx_errors++; 968 outb(0xFF, ioaddr + AM2150_XMT_SKIP); 969 } 970 971 /* Transmit Retry Count (XMTRC, reg 4) */ 972 xmtrc = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTRC); 973 if (xmtrc & MACE_XMTRC_EXDEF) lp->mace_stats.exdef++; 974 lp->mace_stats.xmtrc += (xmtrc & MACE_XMTRC_XMTRC); 975 976 if ( 977 (xmtfs = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTFS)) & 978 MACE_XMTFS_XMTSV /* Transmit Status Valid */ 979 ) { 980 lp->mace_stats.xmtsv++; 981 982 if (xmtfs & ~MACE_XMTFS_XMTSV) { 983 if (xmtfs & MACE_XMTFS_UFLO) { 984 /* Underflow. Indicates that the Transmit FIFO emptied before 985 the end of frame was reached. */ 986 lp->mace_stats.uflo++; 987 } 988 if (xmtfs & MACE_XMTFS_LCOL) { 989 /* Late Collision */ 990 lp->mace_stats.lcol++; 991 } 992 if (xmtfs & MACE_XMTFS_MORE) { 993 /* MORE than one retry was needed */ 994 lp->mace_stats.more++; 995 } 996 if (xmtfs & MACE_XMTFS_ONE) { 997 /* Exactly ONE retry occurred */ 998 lp->mace_stats.one++; 999 } 1000 if (xmtfs & MACE_XMTFS_DEFER) { 1001 /* Transmission was defered */ 1002 lp->mace_stats.defer++; 1003 } 1004 if (xmtfs & MACE_XMTFS_LCAR) { 1005 /* Loss of carrier */ 1006 lp->mace_stats.lcar++; 1007 } 1008 if (xmtfs & MACE_XMTFS_RTRY) { 1009 /* Retry error: transmit aborted after 16 attempts */ 1010 lp->mace_stats.rtry++; 1011 } 1012 } /* if (xmtfs & ~MACE_XMTFS_XMTSV) */ 1013 1014 } /* if (xmtfs & MACE_XMTFS_XMTSV) */ 1015 1016 dev->stats.tx_packets++; 1017 lp->tx_free_frames++; 1018 netif_wake_queue(dev); 1019 } /* if (status & MACE_IR_XMTINT) */ 1020 1021 if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) { 1022 if (status & MACE_IR_JAB) { 1023 /* Jabber Error. Excessive transmit duration (20-150ms). */ 1024 lp->mace_stats.jab++; 1025 } 1026 if (status & MACE_IR_BABL) { 1027 /* Babble Error. >1518 bytes transmitted. */ 1028 lp->mace_stats.babl++; 1029 } 1030 if (status & MACE_IR_CERR) { 1031 /* Collision Error. CERR indicates the absence of the 1032 Signal Quality Error Test message after a packet 1033 transmission. */ 1034 lp->mace_stats.cerr++; 1035 } 1036 if (status & MACE_IR_RCVCCO) { 1037 /* Receive Collision Count Overflow; */ 1038 lp->mace_stats.rcvcco++; 1039 } 1040 if (status & MACE_IR_RNTPCO) { 1041 /* Runt Packet Count Overflow */ 1042 lp->mace_stats.rntpco++; 1043 } 1044 if (status & MACE_IR_MPCO) { 1045 /* Missed Packet Count Overflow */ 1046 lp->mace_stats.mpco++; 1047 } 1048 } /* if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) */ 1049 1050 } while ((status & ~MACE_IMR_DEFAULT) && (--IntrCnt)); 1051 1052 return IRQ_HANDLED; 1053 } /* mace_interrupt */ 1054 1055 /* ---------------------------------------------------------------------------- 1056 mace_rx 1057 Receives packets. 1058 ---------------------------------------------------------------------------- */ mace_rx(struct net_device * dev,unsigned char RxCnt)1059 static int mace_rx(struct net_device *dev, unsigned char RxCnt) 1060 { 1061 mace_private *lp = netdev_priv(dev); 1062 unsigned int ioaddr = dev->base_addr; 1063 unsigned char rx_framecnt; 1064 unsigned short rx_status; 1065 1066 while ( 1067 ((rx_framecnt = inb(ioaddr + AM2150_RCV_FRAME_COUNT)) > 0) && 1068 (rx_framecnt <= 12) && /* rx_framecnt==0xFF if card is extracted. */ 1069 (RxCnt--) 1070 ) { 1071 rx_status = inw(ioaddr + AM2150_RCV); 1072 1073 pr_debug("%s: in mace_rx(), framecnt 0x%X, rx_status" 1074 " 0x%X.\n", dev->name, rx_framecnt, rx_status); 1075 1076 if (rx_status & MACE_RCVFS_RCVSTS) { /* Error, update stats. */ 1077 dev->stats.rx_errors++; 1078 if (rx_status & MACE_RCVFS_OFLO) { 1079 lp->mace_stats.oflo++; 1080 } 1081 if (rx_status & MACE_RCVFS_CLSN) { 1082 lp->mace_stats.clsn++; 1083 } 1084 if (rx_status & MACE_RCVFS_FRAM) { 1085 lp->mace_stats.fram++; 1086 } 1087 if (rx_status & MACE_RCVFS_FCS) { 1088 lp->mace_stats.fcs++; 1089 } 1090 } else { 1091 short pkt_len = (rx_status & ~MACE_RCVFS_RCVSTS) - 4; 1092 /* Auto Strip is off, always subtract 4 */ 1093 struct sk_buff *skb; 1094 1095 lp->mace_stats.rfs_rntpc += inb(ioaddr + AM2150_RCV); 1096 /* runt packet count */ 1097 lp->mace_stats.rfs_rcvcc += inb(ioaddr + AM2150_RCV); 1098 /* rcv collision count */ 1099 1100 pr_debug(" receiving packet size 0x%X rx_status" 1101 " 0x%X.\n", pkt_len, rx_status); 1102 1103 skb = netdev_alloc_skb(dev, pkt_len + 2); 1104 1105 if (skb) { 1106 skb_reserve(skb, 2); 1107 insw(ioaddr + AM2150_RCV, skb_put(skb, pkt_len), pkt_len>>1); 1108 if (pkt_len & 1) 1109 *(skb_tail_pointer(skb) - 1) = inb(ioaddr + AM2150_RCV); 1110 skb->protocol = eth_type_trans(skb, dev); 1111 1112 netif_rx(skb); /* Send the packet to the upper (protocol) layers. */ 1113 1114 dev->stats.rx_packets++; 1115 dev->stats.rx_bytes += pkt_len; 1116 outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */ 1117 continue; 1118 } else { 1119 pr_debug("%s: couldn't allocate a sk_buff of size" 1120 " %d.\n", dev->name, pkt_len); 1121 dev->stats.rx_dropped++; 1122 } 1123 } 1124 outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */ 1125 } /* while */ 1126 1127 return 0; 1128 } /* mace_rx */ 1129 1130 /* ---------------------------------------------------------------------------- 1131 pr_linux_stats 1132 ---------------------------------------------------------------------------- */ pr_linux_stats(struct net_device_stats * pstats)1133 static void pr_linux_stats(struct net_device_stats *pstats) 1134 { 1135 pr_debug("pr_linux_stats\n"); 1136 pr_debug(" rx_packets=%-7ld tx_packets=%ld\n", 1137 (long)pstats->rx_packets, (long)pstats->tx_packets); 1138 pr_debug(" rx_errors=%-7ld tx_errors=%ld\n", 1139 (long)pstats->rx_errors, (long)pstats->tx_errors); 1140 pr_debug(" rx_dropped=%-7ld tx_dropped=%ld\n", 1141 (long)pstats->rx_dropped, (long)pstats->tx_dropped); 1142 pr_debug(" multicast=%-7ld collisions=%ld\n", 1143 (long)pstats->multicast, (long)pstats->collisions); 1144 1145 pr_debug(" rx_length_errors=%-7ld rx_over_errors=%ld\n", 1146 (long)pstats->rx_length_errors, (long)pstats->rx_over_errors); 1147 pr_debug(" rx_crc_errors=%-7ld rx_frame_errors=%ld\n", 1148 (long)pstats->rx_crc_errors, (long)pstats->rx_frame_errors); 1149 pr_debug(" rx_fifo_errors=%-7ld rx_missed_errors=%ld\n", 1150 (long)pstats->rx_fifo_errors, (long)pstats->rx_missed_errors); 1151 1152 pr_debug(" tx_aborted_errors=%-7ld tx_carrier_errors=%ld\n", 1153 (long)pstats->tx_aborted_errors, (long)pstats->tx_carrier_errors); 1154 pr_debug(" tx_fifo_errors=%-7ld tx_heartbeat_errors=%ld\n", 1155 (long)pstats->tx_fifo_errors, (long)pstats->tx_heartbeat_errors); 1156 pr_debug(" tx_window_errors=%ld\n", 1157 (long)pstats->tx_window_errors); 1158 } /* pr_linux_stats */ 1159 1160 /* ---------------------------------------------------------------------------- 1161 pr_mace_stats 1162 ---------------------------------------------------------------------------- */ pr_mace_stats(mace_statistics * pstats)1163 static void pr_mace_stats(mace_statistics *pstats) 1164 { 1165 pr_debug("pr_mace_stats\n"); 1166 1167 pr_debug(" xmtsv=%-7d uflo=%d\n", 1168 pstats->xmtsv, pstats->uflo); 1169 pr_debug(" lcol=%-7d more=%d\n", 1170 pstats->lcol, pstats->more); 1171 pr_debug(" one=%-7d defer=%d\n", 1172 pstats->one, pstats->defer); 1173 pr_debug(" lcar=%-7d rtry=%d\n", 1174 pstats->lcar, pstats->rtry); 1175 1176 /* MACE_XMTRC */ 1177 pr_debug(" exdef=%-7d xmtrc=%d\n", 1178 pstats->exdef, pstats->xmtrc); 1179 1180 /* RFS1--Receive Status (RCVSTS) */ 1181 pr_debug(" oflo=%-7d clsn=%d\n", 1182 pstats->oflo, pstats->clsn); 1183 pr_debug(" fram=%-7d fcs=%d\n", 1184 pstats->fram, pstats->fcs); 1185 1186 /* RFS2--Runt Packet Count (RNTPC) */ 1187 /* RFS3--Receive Collision Count (RCVCC) */ 1188 pr_debug(" rfs_rntpc=%-7d rfs_rcvcc=%d\n", 1189 pstats->rfs_rntpc, pstats->rfs_rcvcc); 1190 1191 /* MACE_IR */ 1192 pr_debug(" jab=%-7d babl=%d\n", 1193 pstats->jab, pstats->babl); 1194 pr_debug(" cerr=%-7d rcvcco=%d\n", 1195 pstats->cerr, pstats->rcvcco); 1196 pr_debug(" rntpco=%-7d mpco=%d\n", 1197 pstats->rntpco, pstats->mpco); 1198 1199 /* MACE_MPC */ 1200 pr_debug(" mpc=%d\n", pstats->mpc); 1201 1202 /* MACE_RNTPC */ 1203 pr_debug(" rntpc=%d\n", pstats->rntpc); 1204 1205 /* MACE_RCVCC */ 1206 pr_debug(" rcvcc=%d\n", pstats->rcvcc); 1207 1208 } /* pr_mace_stats */ 1209 1210 /* ---------------------------------------------------------------------------- 1211 update_stats 1212 Update statistics. We change to register window 1, so this 1213 should be run single-threaded if the device is active. This is 1214 expected to be a rare operation, and it's simpler for the rest 1215 of the driver to assume that window 0 is always valid rather 1216 than use a special window-state variable. 1217 1218 oflo & uflo should _never_ occur since it would mean the Xilinx 1219 was not able to transfer data between the MACE FIFO and the 1220 card's SRAM fast enough. If this happens, something is 1221 seriously wrong with the hardware. 1222 ---------------------------------------------------------------------------- */ update_stats(unsigned int ioaddr,struct net_device * dev)1223 static void update_stats(unsigned int ioaddr, struct net_device *dev) 1224 { 1225 mace_private *lp = netdev_priv(dev); 1226 1227 lp->mace_stats.rcvcc += mace_read(lp, ioaddr, MACE_RCVCC); 1228 lp->mace_stats.rntpc += mace_read(lp, ioaddr, MACE_RNTPC); 1229 lp->mace_stats.mpc += mace_read(lp, ioaddr, MACE_MPC); 1230 /* At this point, mace_stats is fully updated for this call. 1231 We may now update the netdev stats. */ 1232 1233 /* The MACE has no equivalent for netdev stats field which are commented 1234 out. */ 1235 1236 /* dev->stats.multicast; */ 1237 dev->stats.collisions = 1238 lp->mace_stats.rcvcco * 256 + lp->mace_stats.rcvcc; 1239 /* Collision: The MACE may retry sending a packet 15 times 1240 before giving up. The retry count is in XMTRC. 1241 Does each retry constitute a collision? 1242 If so, why doesn't the RCVCC record these collisions? */ 1243 1244 /* detailed rx_errors: */ 1245 dev->stats.rx_length_errors = 1246 lp->mace_stats.rntpco * 256 + lp->mace_stats.rntpc; 1247 /* dev->stats.rx_over_errors */ 1248 dev->stats.rx_crc_errors = lp->mace_stats.fcs; 1249 dev->stats.rx_frame_errors = lp->mace_stats.fram; 1250 dev->stats.rx_fifo_errors = lp->mace_stats.oflo; 1251 dev->stats.rx_missed_errors = 1252 lp->mace_stats.mpco * 256 + lp->mace_stats.mpc; 1253 1254 /* detailed tx_errors */ 1255 dev->stats.tx_aborted_errors = lp->mace_stats.rtry; 1256 dev->stats.tx_carrier_errors = lp->mace_stats.lcar; 1257 /* LCAR usually results from bad cabling. */ 1258 dev->stats.tx_fifo_errors = lp->mace_stats.uflo; 1259 dev->stats.tx_heartbeat_errors = lp->mace_stats.cerr; 1260 /* dev->stats.tx_window_errors; */ 1261 } /* update_stats */ 1262 1263 /* ---------------------------------------------------------------------------- 1264 mace_get_stats 1265 Gathers ethernet statistics from the MACE chip. 1266 ---------------------------------------------------------------------------- */ mace_get_stats(struct net_device * dev)1267 static struct net_device_stats *mace_get_stats(struct net_device *dev) 1268 { 1269 mace_private *lp = netdev_priv(dev); 1270 1271 update_stats(dev->base_addr, dev); 1272 1273 pr_debug("%s: updating the statistics.\n", dev->name); 1274 pr_linux_stats(&dev->stats); 1275 pr_mace_stats(&lp->mace_stats); 1276 1277 return &dev->stats; 1278 } /* net_device_stats */ 1279 1280 /* ---------------------------------------------------------------------------- 1281 updateCRC 1282 Modified from Am79C90 data sheet. 1283 ---------------------------------------------------------------------------- */ 1284 1285 #ifdef BROKEN_MULTICAST 1286 updateCRC(int * CRC,int bit)1287 static void updateCRC(int *CRC, int bit) 1288 { 1289 static const int poly[]={ 1290 1,1,1,0, 1,1,0,1, 1291 1,0,1,1, 1,0,0,0, 1292 1,0,0,0, 0,0,1,1, 1293 0,0,1,0, 0,0,0,0 1294 }; /* CRC polynomial. poly[n] = coefficient of the x**n term of the 1295 CRC generator polynomial. */ 1296 1297 int j; 1298 1299 /* shift CRC and control bit (CRC[32]) */ 1300 for (j = 32; j > 0; j--) 1301 CRC[j] = CRC[j-1]; 1302 CRC[0] = 0; 1303 1304 /* If bit XOR(control bit) = 1, set CRC = CRC XOR polynomial. */ 1305 if (bit ^ CRC[32]) 1306 for (j = 0; j < 32; j++) 1307 CRC[j] ^= poly[j]; 1308 } /* updateCRC */ 1309 1310 /* ---------------------------------------------------------------------------- 1311 BuildLAF 1312 Build logical address filter. 1313 Modified from Am79C90 data sheet. 1314 1315 Input 1316 ladrf: logical address filter (contents initialized to 0) 1317 adr: ethernet address 1318 ---------------------------------------------------------------------------- */ BuildLAF(int * ladrf,int * adr)1319 static void BuildLAF(int *ladrf, int *adr) 1320 { 1321 int CRC[33]={1}; /* CRC register, 1 word/bit + extra control bit */ 1322 1323 int i, byte; /* temporary array indices */ 1324 int hashcode; /* the output object */ 1325 1326 CRC[32]=0; 1327 1328 for (byte = 0; byte < 6; byte++) 1329 for (i = 0; i < 8; i++) 1330 updateCRC(CRC, (adr[byte] >> i) & 1); 1331 1332 hashcode = 0; 1333 for (i = 0; i < 6; i++) 1334 hashcode = (hashcode << 1) + CRC[i]; 1335 1336 byte = hashcode >> 3; 1337 ladrf[byte] |= (1 << (hashcode & 7)); 1338 1339 #ifdef PCMCIA_DEBUG 1340 if (0) 1341 printk(KERN_DEBUG " adr =%pM\n", adr); 1342 printk(KERN_DEBUG " hashcode = %d(decimal), ladrf[0:63] =", hashcode); 1343 for (i = 0; i < 8; i++) 1344 pr_cont(" %02X", ladrf[i]); 1345 pr_cont("\n"); 1346 #endif 1347 } /* BuildLAF */ 1348 1349 /* ---------------------------------------------------------------------------- 1350 restore_multicast_list 1351 Restores the multicast filter for MACE chip to the last 1352 set_multicast_list() call. 1353 1354 Input 1355 multicast_num_addrs 1356 multicast_ladrf[] 1357 ---------------------------------------------------------------------------- */ restore_multicast_list(struct net_device * dev)1358 static void restore_multicast_list(struct net_device *dev) 1359 { 1360 mace_private *lp = netdev_priv(dev); 1361 int num_addrs = lp->multicast_num_addrs; 1362 int *ladrf = lp->multicast_ladrf; 1363 unsigned int ioaddr = dev->base_addr; 1364 int i; 1365 1366 pr_debug("%s: restoring Rx mode to %d addresses.\n", 1367 dev->name, num_addrs); 1368 1369 if (num_addrs > 0) { 1370 1371 pr_debug("Attempt to restore multicast list detected.\n"); 1372 1373 mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_LOGADDR); 1374 /* Poll ADDRCHG bit */ 1375 while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG) 1376 ; 1377 /* Set LADRF register */ 1378 for (i = 0; i < MACE_LADRF_LEN; i++) 1379 mace_write(lp, ioaddr, MACE_LADRF, ladrf[i]); 1380 1381 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_RCVFCSE | MACE_UTR_LOOP_EXTERNAL); 1382 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV); 1383 1384 } else if (num_addrs < 0) { 1385 1386 /* Promiscuous mode: receive all packets */ 1387 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL); 1388 mace_write(lp, ioaddr, MACE_MACCC, 1389 MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV 1390 ); 1391 1392 } else { 1393 1394 /* Normal mode */ 1395 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL); 1396 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV); 1397 1398 } 1399 } /* restore_multicast_list */ 1400 1401 /* ---------------------------------------------------------------------------- 1402 set_multicast_list 1403 Set or clear the multicast filter for this adaptor. 1404 1405 Input 1406 num_addrs == -1 Promiscuous mode, receive all packets 1407 num_addrs == 0 Normal mode, clear multicast list 1408 num_addrs > 0 Multicast mode, receive normal and MC packets, and do 1409 best-effort filtering. 1410 Output 1411 multicast_num_addrs 1412 multicast_ladrf[] 1413 ---------------------------------------------------------------------------- */ 1414 set_multicast_list(struct net_device * dev)1415 static void set_multicast_list(struct net_device *dev) 1416 { 1417 mace_private *lp = netdev_priv(dev); 1418 int adr[ETH_ALEN] = {0}; /* Ethernet address */ 1419 struct netdev_hw_addr *ha; 1420 1421 #ifdef PCMCIA_DEBUG 1422 { 1423 static int old; 1424 if (netdev_mc_count(dev) != old) { 1425 old = netdev_mc_count(dev); 1426 pr_debug("%s: setting Rx mode to %d addresses.\n", 1427 dev->name, old); 1428 } 1429 } 1430 #endif 1431 1432 /* Set multicast_num_addrs. */ 1433 lp->multicast_num_addrs = netdev_mc_count(dev); 1434 1435 /* Set multicast_ladrf. */ 1436 if (num_addrs > 0) { 1437 /* Calculate multicast logical address filter */ 1438 memset(lp->multicast_ladrf, 0, MACE_LADRF_LEN); 1439 netdev_for_each_mc_addr(ha, dev) { 1440 memcpy(adr, ha->addr, ETH_ALEN); 1441 BuildLAF(lp->multicast_ladrf, adr); 1442 } 1443 } 1444 1445 restore_multicast_list(dev); 1446 1447 } /* set_multicast_list */ 1448 1449 #endif /* BROKEN_MULTICAST */ 1450 restore_multicast_list(struct net_device * dev)1451 static void restore_multicast_list(struct net_device *dev) 1452 { 1453 unsigned int ioaddr = dev->base_addr; 1454 mace_private *lp = netdev_priv(dev); 1455 1456 pr_debug("%s: restoring Rx mode to %d addresses.\n", dev->name, 1457 lp->multicast_num_addrs); 1458 1459 if (dev->flags & IFF_PROMISC) { 1460 /* Promiscuous mode: receive all packets */ 1461 mace_write(lp,ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL); 1462 mace_write(lp, ioaddr, MACE_MACCC, 1463 MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV 1464 ); 1465 } else { 1466 /* Normal mode */ 1467 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL); 1468 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV); 1469 } 1470 } /* restore_multicast_list */ 1471 set_multicast_list(struct net_device * dev)1472 static void set_multicast_list(struct net_device *dev) 1473 { 1474 mace_private *lp = netdev_priv(dev); 1475 1476 #ifdef PCMCIA_DEBUG 1477 { 1478 static int old; 1479 if (netdev_mc_count(dev) != old) { 1480 old = netdev_mc_count(dev); 1481 pr_debug("%s: setting Rx mode to %d addresses.\n", 1482 dev->name, old); 1483 } 1484 } 1485 #endif 1486 1487 lp->multicast_num_addrs = netdev_mc_count(dev); 1488 restore_multicast_list(dev); 1489 1490 } /* set_multicast_list */ 1491 1492 static const struct pcmcia_device_id nmclan_ids[] = { 1493 PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "Ethernet", 0x085a850b, 0x00b2e941), 1494 PCMCIA_DEVICE_PROD_ID12("Portable Add-ons", "Ethernet+", 0xebf1d60, 0xad673aaf), 1495 PCMCIA_DEVICE_NULL, 1496 }; 1497 MODULE_DEVICE_TABLE(pcmcia, nmclan_ids); 1498 1499 static struct pcmcia_driver nmclan_cs_driver = { 1500 .owner = THIS_MODULE, 1501 .name = "nmclan_cs", 1502 .probe = nmclan_probe, 1503 .remove = nmclan_detach, 1504 .id_table = nmclan_ids, 1505 .suspend = nmclan_suspend, 1506 .resume = nmclan_resume, 1507 }; 1508 module_pcmcia_driver(nmclan_cs_driver); 1509