1/* 3c574.c: A PCMCIA ethernet driver for the 3com 3c574 "RoadRunner". 2 3 Written 1993-1998 by 4 Donald Becker, becker@scyld.com, (driver core) and 5 David Hinds, dahinds@users.sourceforge.net (from his PC card code). 6 Locking fixes (C) Copyright 2003 Red Hat Inc 7 8 This software may be used and distributed according to the terms of 9 the GNU General Public License, incorporated herein by reference. 10 11 This driver derives from Donald Becker's 3c509 core, which has the 12 following copyright: 13 Copyright 1993 United States Government as represented by the 14 Director, National Security Agency. 15 16 17*/ 18 19/* 20 Theory of Operation 21 22I. Board Compatibility 23 24This device driver is designed for the 3Com 3c574 PC card Fast Ethernet 25Adapter. 26 27II. Board-specific settings 28 29None -- PC cards are autoconfigured. 30 31III. Driver operation 32 33The 3c574 uses a Boomerang-style interface, without the bus-master capability. 34See the Boomerang driver and documentation for most details. 35 36IV. Notes and chip documentation. 37 38Two added registers are used to enhance PIO performance, RunnerRdCtrl and 39RunnerWrCtrl. These are 11 bit down-counters that are preloaded with the 40count of word (16 bits) reads or writes the driver is about to do to the Rx 41or Tx FIFO. The chip is then able to hide the internal-PCI-bus to PC-card 42translation latency by buffering the I/O operations with an 8 word FIFO. 43Note: No other chip accesses are permitted when this buffer is used. 44 45A second enhancement is that both attribute and common memory space 460x0800-0x0fff can translated to the PIO FIFO. Thus memory operations (faster 47with *some* PCcard bridges) may be used instead of I/O operations. 48This is enabled by setting the 0x10 bit in the PCMCIA LAN COR. 49 50Some slow PC card bridges work better if they never see a WAIT signal. 51This is configured by setting the 0x20 bit in the PCMCIA LAN COR. 52Only do this after testing that it is reliable and improves performance. 53 54The upper five bits of RunnerRdCtrl are used to window into PCcard 55configuration space registers. Window 0 is the regular Boomerang/Odie 56register set, 1-5 are various PC card control registers, and 16-31 are 57the (reversed!) CIS table. 58 59A final note: writing the InternalConfig register in window 3 with an 60invalid ramWidth is Very Bad. 61 62V. References 63 64http://www.scyld.com/expert/NWay.html 65http://www.national.com/opf/DP/DP83840A.html 66 67Thanks to Terry Murphy of 3Com for providing development information for 68earlier 3Com products. 69 70*/ 71 72#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 73 74#include <linux/module.h> 75#include <linux/kernel.h> 76#include <linux/init.h> 77#include <linux/slab.h> 78#include <linux/string.h> 79#include <linux/timer.h> 80#include <linux/interrupt.h> 81#include <linux/in.h> 82#include <linux/delay.h> 83#include <linux/netdevice.h> 84#include <linux/etherdevice.h> 85#include <linux/skbuff.h> 86#include <linux/if_arp.h> 87#include <linux/ioport.h> 88#include <linux/bitops.h> 89#include <linux/mii.h> 90 91#include <pcmcia/cistpl.h> 92#include <pcmcia/cisreg.h> 93#include <pcmcia/ciscode.h> 94#include <pcmcia/ds.h> 95 96#include <asm/uaccess.h> 97#include <asm/io.h> 98 99/*====================================================================*/ 100 101/* Module parameters */ 102 103MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 104MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver"); 105MODULE_LICENSE("GPL"); 106 107#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) 108 109/* Maximum events (Rx packets, etc.) to handle at each interrupt. */ 110INT_MODULE_PARM(max_interrupt_work, 32); 111 112/* Force full duplex modes? */ 113INT_MODULE_PARM(full_duplex, 0); 114 115/* Autodetect link polarity reversal? */ 116INT_MODULE_PARM(auto_polarity, 1); 117 118 119/*====================================================================*/ 120 121/* Time in jiffies before concluding the transmitter is hung. */ 122#define TX_TIMEOUT ((800*HZ)/1000) 123 124/* To minimize the size of the driver source and make the driver more 125 readable not all constants are symbolically defined. 126 You'll need the manual if you want to understand driver details anyway. */ 127/* Offsets from base I/O address. */ 128#define EL3_DATA 0x00 129#define EL3_CMD 0x0e 130#define EL3_STATUS 0x0e 131 132#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD) 133 134/* The top five bits written to EL3_CMD are a command, the lower 135 11 bits are the parameter, if applicable. */ 136enum el3_cmds { 137 TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11, 138 RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11, 139 TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11, 140 FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11, 141 SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11, 142 SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11, 143 StatsDisable = 22<<11, StopCoax = 23<<11, 144}; 145 146enum elxl_status { 147 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004, 148 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020, 149 IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000 }; 150 151/* The SetRxFilter command accepts the following classes: */ 152enum RxFilter { 153 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 154}; 155 156enum Window0 { 157 Wn0EepromCmd = 10, Wn0EepromData = 12, /* EEPROM command/address, data. */ 158 IntrStatus=0x0E, /* Valid in all windows. */ 159}; 160/* These assumes the larger EEPROM. */ 161enum Win0_EEPROM_cmds { 162 EEPROM_Read = 0x200, EEPROM_WRITE = 0x100, EEPROM_ERASE = 0x300, 163 EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */ 164 EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */ 165}; 166 167/* Register window 1 offsets, the window used in normal operation. 168 On the "Odie" this window is always mapped at offsets 0x10-0x1f. 169 Except for TxFree, which is overlapped by RunnerWrCtrl. */ 170enum Window1 { 171 TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14, 172 RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B, 173 TxFree = 0x0C, /* Remaining free bytes in Tx buffer. */ 174 RunnerRdCtrl = 0x16, RunnerWrCtrl = 0x1c, 175}; 176 177enum Window3 { /* Window 3: MAC/config bits. */ 178 Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8, 179}; 180enum wn3_config { 181 Ram_size = 7, 182 Ram_width = 8, 183 Ram_speed = 0x30, 184 Rom_size = 0xc0, 185 Ram_split_shift = 16, 186 Ram_split = 3 << Ram_split_shift, 187 Xcvr_shift = 20, 188 Xcvr = 7 << Xcvr_shift, 189 Autoselect = 0x1000000, 190}; 191 192enum Window4 { /* Window 4: Xcvr/media bits. */ 193 Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10, 194}; 195 196#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */ 197 198struct el3_private { 199 struct pcmcia_device *p_dev; 200 u16 advertising, partner; /* NWay media advertisement */ 201 unsigned char phys; /* MII device address */ 202 unsigned int autoselect:1, default_media:3; /* Read from the EEPROM/Wn3_Config. */ 203 /* for transceiver monitoring */ 204 struct timer_list media; 205 unsigned short media_status; 206 unsigned short fast_poll; 207 unsigned long last_irq; 208 spinlock_t window_lock; /* Guards the Window selection */ 209}; 210 211/* Set iff a MII transceiver on any interface requires mdio preamble. 212 This only set with the original DP83840 on older 3c905 boards, so the extra 213 code size of a per-interface flag is not worthwhile. */ 214static char mii_preamble_required = 0; 215 216/* Index of functions. */ 217 218static int tc574_config(struct pcmcia_device *link); 219static void tc574_release(struct pcmcia_device *link); 220 221static void mdio_sync(unsigned int ioaddr, int bits); 222static int mdio_read(unsigned int ioaddr, int phy_id, int location); 223static void mdio_write(unsigned int ioaddr, int phy_id, int location, 224 int value); 225static unsigned short read_eeprom(unsigned int ioaddr, int index); 226static void tc574_wait_for_completion(struct net_device *dev, int cmd); 227 228static void tc574_reset(struct net_device *dev); 229static void media_check(unsigned long arg); 230static int el3_open(struct net_device *dev); 231static netdev_tx_t el3_start_xmit(struct sk_buff *skb, 232 struct net_device *dev); 233static irqreturn_t el3_interrupt(int irq, void *dev_id); 234static void update_stats(struct net_device *dev); 235static struct net_device_stats *el3_get_stats(struct net_device *dev); 236static int el3_rx(struct net_device *dev, int worklimit); 237static int el3_close(struct net_device *dev); 238static void el3_tx_timeout(struct net_device *dev); 239static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 240static void set_rx_mode(struct net_device *dev); 241static void set_multicast_list(struct net_device *dev); 242 243static void tc574_detach(struct pcmcia_device *p_dev); 244 245/* 246 tc574_attach() creates an "instance" of the driver, allocating 247 local data structures for one device. The device is registered 248 with Card Services. 249*/ 250static const struct net_device_ops el3_netdev_ops = { 251 .ndo_open = el3_open, 252 .ndo_stop = el3_close, 253 .ndo_start_xmit = el3_start_xmit, 254 .ndo_tx_timeout = el3_tx_timeout, 255 .ndo_get_stats = el3_get_stats, 256 .ndo_do_ioctl = el3_ioctl, 257 .ndo_set_rx_mode = set_multicast_list, 258 .ndo_change_mtu = eth_change_mtu, 259 .ndo_set_mac_address = eth_mac_addr, 260 .ndo_validate_addr = eth_validate_addr, 261}; 262 263static int tc574_probe(struct pcmcia_device *link) 264{ 265 struct el3_private *lp; 266 struct net_device *dev; 267 268 dev_dbg(&link->dev, "3c574_attach()\n"); 269 270 /* Create the PC card device object. */ 271 dev = alloc_etherdev(sizeof(struct el3_private)); 272 if (!dev) 273 return -ENOMEM; 274 lp = netdev_priv(dev); 275 link->priv = dev; 276 lp->p_dev = link; 277 278 spin_lock_init(&lp->window_lock); 279 link->resource[0]->end = 32; 280 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16; 281 link->config_flags |= CONF_ENABLE_IRQ; 282 link->config_index = 1; 283 284 dev->netdev_ops = &el3_netdev_ops; 285 dev->watchdog_timeo = TX_TIMEOUT; 286 287 return tc574_config(link); 288} 289 290static void tc574_detach(struct pcmcia_device *link) 291{ 292 struct net_device *dev = link->priv; 293 294 dev_dbg(&link->dev, "3c574_detach()\n"); 295 296 unregister_netdev(dev); 297 298 tc574_release(link); 299 300 free_netdev(dev); 301} /* tc574_detach */ 302 303static const char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"}; 304 305static int tc574_config(struct pcmcia_device *link) 306{ 307 struct net_device *dev = link->priv; 308 struct el3_private *lp = netdev_priv(dev); 309 int ret, i, j; 310 unsigned int ioaddr; 311 __be16 *phys_addr; 312 char *cardname; 313 __u32 config; 314 u8 *buf; 315 size_t len; 316 317 phys_addr = (__be16 *)dev->dev_addr; 318 319 dev_dbg(&link->dev, "3c574_config()\n"); 320 321 link->io_lines = 16; 322 323 for (i = j = 0; j < 0x400; j += 0x20) { 324 link->resource[0]->start = j ^ 0x300; 325 i = pcmcia_request_io(link); 326 if (i == 0) 327 break; 328 } 329 if (i != 0) 330 goto failed; 331 332 ret = pcmcia_request_irq(link, el3_interrupt); 333 if (ret) 334 goto failed; 335 336 ret = pcmcia_enable_device(link); 337 if (ret) 338 goto failed; 339 340 dev->irq = link->irq; 341 dev->base_addr = link->resource[0]->start; 342 343 ioaddr = dev->base_addr; 344 345 /* The 3c574 normally uses an EEPROM for configuration info, including 346 the hardware address. The future products may include a modem chip 347 and put the address in the CIS. */ 348 349 len = pcmcia_get_tuple(link, 0x88, &buf); 350 if (buf && len >= 6) { 351 for (i = 0; i < 3; i++) 352 phys_addr[i] = htons(le16_to_cpu(buf[i * 2])); 353 kfree(buf); 354 } else { 355 kfree(buf); /* 0 < len < 6 */ 356 EL3WINDOW(0); 357 for (i = 0; i < 3; i++) 358 phys_addr[i] = htons(read_eeprom(ioaddr, i + 10)); 359 if (phys_addr[0] == htons(0x6060)) { 360 pr_notice("IO port conflict at 0x%03lx-0x%03lx\n", 361 dev->base_addr, dev->base_addr+15); 362 goto failed; 363 } 364 } 365 if (link->prod_id[1]) 366 cardname = link->prod_id[1]; 367 else 368 cardname = "3Com 3c574"; 369 370 { 371 u_char mcr; 372 outw(2<<11, ioaddr + RunnerRdCtrl); 373 mcr = inb(ioaddr + 2); 374 outw(0<<11, ioaddr + RunnerRdCtrl); 375 pr_info(" ASIC rev %d,", mcr>>3); 376 EL3WINDOW(3); 377 config = inl(ioaddr + Wn3_Config); 378 lp->default_media = (config & Xcvr) >> Xcvr_shift; 379 lp->autoselect = config & Autoselect ? 1 : 0; 380 } 381 382 init_timer(&lp->media); 383 384 { 385 int phy; 386 387 /* Roadrunner only: Turn on the MII transceiver */ 388 outw(0x8040, ioaddr + Wn3_Options); 389 mdelay(1); 390 outw(0xc040, ioaddr + Wn3_Options); 391 tc574_wait_for_completion(dev, TxReset); 392 tc574_wait_for_completion(dev, RxReset); 393 mdelay(1); 394 outw(0x8040, ioaddr + Wn3_Options); 395 396 EL3WINDOW(4); 397 for (phy = 1; phy <= 32; phy++) { 398 int mii_status; 399 mdio_sync(ioaddr, 32); 400 mii_status = mdio_read(ioaddr, phy & 0x1f, 1); 401 if (mii_status != 0xffff) { 402 lp->phys = phy & 0x1f; 403 dev_dbg(&link->dev, " MII transceiver at " 404 "index %d, status %x.\n", 405 phy, mii_status); 406 if ((mii_status & 0x0040) == 0) 407 mii_preamble_required = 1; 408 break; 409 } 410 } 411 if (phy > 32) { 412 pr_notice(" No MII transceivers found!\n"); 413 goto failed; 414 } 415 i = mdio_read(ioaddr, lp->phys, 16) | 0x40; 416 mdio_write(ioaddr, lp->phys, 16, i); 417 lp->advertising = mdio_read(ioaddr, lp->phys, 4); 418 if (full_duplex) { 419 /* Only advertise the FD media types. */ 420 lp->advertising &= ~0x02a0; 421 mdio_write(ioaddr, lp->phys, 4, lp->advertising); 422 } 423 } 424 425 SET_NETDEV_DEV(dev, &link->dev); 426 427 if (register_netdev(dev) != 0) { 428 pr_notice("register_netdev() failed\n"); 429 goto failed; 430 } 431 432 netdev_info(dev, "%s at io %#3lx, irq %d, hw_addr %pM\n", 433 cardname, dev->base_addr, dev->irq, dev->dev_addr); 434 netdev_info(dev, " %dK FIFO split %s Rx:Tx, %sMII interface.\n", 435 8 << config & Ram_size, 436 ram_split[(config & Ram_split) >> Ram_split_shift], 437 config & Autoselect ? "autoselect " : ""); 438 439 return 0; 440 441failed: 442 tc574_release(link); 443 return -ENODEV; 444 445} /* tc574_config */ 446 447static void tc574_release(struct pcmcia_device *link) 448{ 449 pcmcia_disable_device(link); 450} 451 452static int tc574_suspend(struct pcmcia_device *link) 453{ 454 struct net_device *dev = link->priv; 455 456 if (link->open) 457 netif_device_detach(dev); 458 459 return 0; 460} 461 462static int tc574_resume(struct pcmcia_device *link) 463{ 464 struct net_device *dev = link->priv; 465 466 if (link->open) { 467 tc574_reset(dev); 468 netif_device_attach(dev); 469 } 470 471 return 0; 472} 473 474static void dump_status(struct net_device *dev) 475{ 476 unsigned int ioaddr = dev->base_addr; 477 EL3WINDOW(1); 478 netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x, tx free %04x\n", 479 inw(ioaddr+EL3_STATUS), 480 inw(ioaddr+RxStatus), inb(ioaddr+TxStatus), 481 inw(ioaddr+TxFree)); 482 EL3WINDOW(4); 483 netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n", 484 inw(ioaddr+0x04), inw(ioaddr+0x06), 485 inw(ioaddr+0x08), inw(ioaddr+0x0a)); 486 EL3WINDOW(1); 487} 488 489/* 490 Use this for commands that may take time to finish 491*/ 492static void tc574_wait_for_completion(struct net_device *dev, int cmd) 493{ 494 int i = 1500; 495 outw(cmd, dev->base_addr + EL3_CMD); 496 while (--i > 0) 497 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break; 498 if (i == 0) 499 netdev_notice(dev, "command 0x%04x did not complete!\n", cmd); 500} 501 502/* Read a word from the EEPROM using the regular EEPROM access register. 503 Assume that we are in register window zero. 504 */ 505static unsigned short read_eeprom(unsigned int ioaddr, int index) 506{ 507 int timer; 508 outw(EEPROM_Read + index, ioaddr + Wn0EepromCmd); 509 /* Pause for at least 162 usec for the read to take place. */ 510 for (timer = 1620; timer >= 0; timer--) { 511 if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0) 512 break; 513 } 514 return inw(ioaddr + Wn0EepromData); 515} 516 517/* MII transceiver control section. 518 Read and write the MII registers using software-generated serial 519 MDIO protocol. See the MII specifications or DP83840A data sheet 520 for details. 521 The maxium data clock rate is 2.5 Mhz. The timing is easily met by the 522 slow PC card interface. */ 523 524#define MDIO_SHIFT_CLK 0x01 525#define MDIO_DIR_WRITE 0x04 526#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE) 527#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE) 528#define MDIO_DATA_READ 0x02 529#define MDIO_ENB_IN 0x00 530 531/* Generate the preamble required for initial synchronization and 532 a few older transceivers. */ 533static void mdio_sync(unsigned int ioaddr, int bits) 534{ 535 unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; 536 537 /* Establish sync by sending at least 32 logic ones. */ 538 while (-- bits >= 0) { 539 outw(MDIO_DATA_WRITE1, mdio_addr); 540 outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); 541 } 542} 543 544static int mdio_read(unsigned int ioaddr, int phy_id, int location) 545{ 546 int i; 547 int read_cmd = (0xf6 << 10) | (phy_id << 5) | location; 548 unsigned int retval = 0; 549 unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; 550 551 if (mii_preamble_required) 552 mdio_sync(ioaddr, 32); 553 554 /* Shift the read command bits out. */ 555 for (i = 14; i >= 0; i--) { 556 int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; 557 outw(dataval, mdio_addr); 558 outw(dataval | MDIO_SHIFT_CLK, mdio_addr); 559 } 560 /* Read the two transition, 16 data, and wire-idle bits. */ 561 for (i = 19; i > 0; i--) { 562 outw(MDIO_ENB_IN, mdio_addr); 563 retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0); 564 outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); 565 } 566 return (retval>>1) & 0xffff; 567} 568 569static void mdio_write(unsigned int ioaddr, int phy_id, int location, int value) 570{ 571 int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value; 572 unsigned int mdio_addr = ioaddr + Wn4_PhysicalMgmt; 573 int i; 574 575 if (mii_preamble_required) 576 mdio_sync(ioaddr, 32); 577 578 /* Shift the command bits out. */ 579 for (i = 31; i >= 0; i--) { 580 int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; 581 outw(dataval, mdio_addr); 582 outw(dataval | MDIO_SHIFT_CLK, mdio_addr); 583 } 584 /* Leave the interface idle. */ 585 for (i = 1; i >= 0; i--) { 586 outw(MDIO_ENB_IN, mdio_addr); 587 outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); 588 } 589} 590 591/* Reset and restore all of the 3c574 registers. */ 592static void tc574_reset(struct net_device *dev) 593{ 594 struct el3_private *lp = netdev_priv(dev); 595 int i; 596 unsigned int ioaddr = dev->base_addr; 597 unsigned long flags; 598 599 tc574_wait_for_completion(dev, TotalReset|0x10); 600 601 spin_lock_irqsave(&lp->window_lock, flags); 602 /* Clear any transactions in progress. */ 603 outw(0, ioaddr + RunnerWrCtrl); 604 outw(0, ioaddr + RunnerRdCtrl); 605 606 /* Set the station address and mask. */ 607 EL3WINDOW(2); 608 for (i = 0; i < 6; i++) 609 outb(dev->dev_addr[i], ioaddr + i); 610 for (; i < 12; i+=2) 611 outw(0, ioaddr + i); 612 613 /* Reset config options */ 614 EL3WINDOW(3); 615 outb((dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); 616 outl((lp->autoselect ? 0x01000000 : 0) | 0x0062001b, 617 ioaddr + Wn3_Config); 618 /* Roadrunner only: Turn on the MII transceiver. */ 619 outw(0x8040, ioaddr + Wn3_Options); 620 mdelay(1); 621 outw(0xc040, ioaddr + Wn3_Options); 622 EL3WINDOW(1); 623 spin_unlock_irqrestore(&lp->window_lock, flags); 624 625 tc574_wait_for_completion(dev, TxReset); 626 tc574_wait_for_completion(dev, RxReset); 627 mdelay(1); 628 spin_lock_irqsave(&lp->window_lock, flags); 629 EL3WINDOW(3); 630 outw(0x8040, ioaddr + Wn3_Options); 631 632 /* Switch to the stats window, and clear all stats by reading. */ 633 outw(StatsDisable, ioaddr + EL3_CMD); 634 EL3WINDOW(6); 635 for (i = 0; i < 10; i++) 636 inb(ioaddr + i); 637 inw(ioaddr + 10); 638 inw(ioaddr + 12); 639 EL3WINDOW(4); 640 inb(ioaddr + 12); 641 inb(ioaddr + 13); 642 643 /* .. enable any extra statistics bits.. */ 644 outw(0x0040, ioaddr + Wn4_NetDiag); 645 646 EL3WINDOW(1); 647 spin_unlock_irqrestore(&lp->window_lock, flags); 648 649 /* .. re-sync MII and re-fill what NWay is advertising. */ 650 mdio_sync(ioaddr, 32); 651 mdio_write(ioaddr, lp->phys, 4, lp->advertising); 652 if (!auto_polarity) { 653 /* works for TDK 78Q2120 series MII's */ 654 i = mdio_read(ioaddr, lp->phys, 16) | 0x20; 655 mdio_write(ioaddr, lp->phys, 16, i); 656 } 657 658 spin_lock_irqsave(&lp->window_lock, flags); 659 /* Switch to register set 1 for normal use, just for TxFree. */ 660 set_rx_mode(dev); 661 spin_unlock_irqrestore(&lp->window_lock, flags); 662 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */ 663 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */ 664 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */ 665 /* Allow status bits to be seen. */ 666 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD); 667 /* Ack all pending events, and set active indicator mask. */ 668 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq, 669 ioaddr + EL3_CMD); 670 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull 671 | AdapterFailure | RxEarly, ioaddr + EL3_CMD); 672} 673 674static int el3_open(struct net_device *dev) 675{ 676 struct el3_private *lp = netdev_priv(dev); 677 struct pcmcia_device *link = lp->p_dev; 678 679 if (!pcmcia_dev_present(link)) 680 return -ENODEV; 681 682 link->open++; 683 netif_start_queue(dev); 684 685 tc574_reset(dev); 686 lp->media.function = media_check; 687 lp->media.data = (unsigned long) dev; 688 lp->media.expires = jiffies + HZ; 689 add_timer(&lp->media); 690 691 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n", 692 dev->name, inw(dev->base_addr + EL3_STATUS)); 693 694 return 0; 695} 696 697static void el3_tx_timeout(struct net_device *dev) 698{ 699 unsigned int ioaddr = dev->base_addr; 700 701 netdev_notice(dev, "Transmit timed out!\n"); 702 dump_status(dev); 703 dev->stats.tx_errors++; 704 dev->trans_start = jiffies; /* prevent tx timeout */ 705 /* Issue TX_RESET and TX_START commands. */ 706 tc574_wait_for_completion(dev, TxReset); 707 outw(TxEnable, ioaddr + EL3_CMD); 708 netif_wake_queue(dev); 709} 710 711static void pop_tx_status(struct net_device *dev) 712{ 713 unsigned int ioaddr = dev->base_addr; 714 int i; 715 716 /* Clear the Tx status stack. */ 717 for (i = 32; i > 0; i--) { 718 u_char tx_status = inb(ioaddr + TxStatus); 719 if (!(tx_status & 0x84)) 720 break; 721 /* reset transmitter on jabber error or underrun */ 722 if (tx_status & 0x30) 723 tc574_wait_for_completion(dev, TxReset); 724 if (tx_status & 0x38) { 725 pr_debug("%s: transmit error: status 0x%02x\n", 726 dev->name, tx_status); 727 outw(TxEnable, ioaddr + EL3_CMD); 728 dev->stats.tx_aborted_errors++; 729 } 730 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */ 731 } 732} 733 734static netdev_tx_t el3_start_xmit(struct sk_buff *skb, 735 struct net_device *dev) 736{ 737 unsigned int ioaddr = dev->base_addr; 738 struct el3_private *lp = netdev_priv(dev); 739 unsigned long flags; 740 741 pr_debug("%s: el3_start_xmit(length = %ld) called, " 742 "status %4.4x.\n", dev->name, (long)skb->len, 743 inw(ioaddr + EL3_STATUS)); 744 745 spin_lock_irqsave(&lp->window_lock, flags); 746 747 dev->stats.tx_bytes += skb->len; 748 749 /* Put out the doubleword header... */ 750 outw(skb->len, ioaddr + TX_FIFO); 751 outw(0, ioaddr + TX_FIFO); 752 /* ... and the packet rounded to a doubleword. */ 753 outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2); 754 755 /* TxFree appears only in Window 1, not offset 0x1c. */ 756 if (inw(ioaddr + TxFree) <= 1536) { 757 netif_stop_queue(dev); 758 /* Interrupt us when the FIFO has room for max-sized packet. 759 The threshold is in units of dwords. */ 760 outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD); 761 } 762 763 pop_tx_status(dev); 764 spin_unlock_irqrestore(&lp->window_lock, flags); 765 dev_kfree_skb(skb); 766 return NETDEV_TX_OK; 767} 768 769/* The EL3 interrupt handler. */ 770static irqreturn_t el3_interrupt(int irq, void *dev_id) 771{ 772 struct net_device *dev = (struct net_device *) dev_id; 773 struct el3_private *lp = netdev_priv(dev); 774 unsigned int ioaddr; 775 unsigned status; 776 int work_budget = max_interrupt_work; 777 int handled = 0; 778 779 if (!netif_device_present(dev)) 780 return IRQ_NONE; 781 ioaddr = dev->base_addr; 782 783 pr_debug("%s: interrupt, status %4.4x.\n", 784 dev->name, inw(ioaddr + EL3_STATUS)); 785 786 spin_lock(&lp->window_lock); 787 788 while ((status = inw(ioaddr + EL3_STATUS)) & 789 (IntLatch | RxComplete | RxEarly | StatsFull)) { 790 if (!netif_device_present(dev) || 791 ((status & 0xe000) != 0x2000)) { 792 pr_debug("%s: Interrupt from dead card\n", dev->name); 793 break; 794 } 795 796 handled = 1; 797 798 if (status & RxComplete) 799 work_budget = el3_rx(dev, work_budget); 800 801 if (status & TxAvailable) { 802 pr_debug(" TX room bit was handled.\n"); 803 /* There's room in the FIFO for a full-sized packet. */ 804 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD); 805 netif_wake_queue(dev); 806 } 807 808 if (status & TxComplete) 809 pop_tx_status(dev); 810 811 if (status & (AdapterFailure | RxEarly | StatsFull)) { 812 /* Handle all uncommon interrupts. */ 813 if (status & StatsFull) 814 update_stats(dev); 815 if (status & RxEarly) { 816 work_budget = el3_rx(dev, work_budget); 817 outw(AckIntr | RxEarly, ioaddr + EL3_CMD); 818 } 819 if (status & AdapterFailure) { 820 u16 fifo_diag; 821 EL3WINDOW(4); 822 fifo_diag = inw(ioaddr + Wn4_FIFODiag); 823 EL3WINDOW(1); 824 netdev_notice(dev, "adapter failure, FIFO diagnostic register %04x\n", 825 fifo_diag); 826 if (fifo_diag & 0x0400) { 827 /* Tx overrun */ 828 tc574_wait_for_completion(dev, TxReset); 829 outw(TxEnable, ioaddr + EL3_CMD); 830 } 831 if (fifo_diag & 0x2000) { 832 /* Rx underrun */ 833 tc574_wait_for_completion(dev, RxReset); 834 set_rx_mode(dev); 835 outw(RxEnable, ioaddr + EL3_CMD); 836 } 837 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD); 838 } 839 } 840 841 if (--work_budget < 0) { 842 pr_debug("%s: Too much work in interrupt, " 843 "status %4.4x.\n", dev->name, status); 844 /* Clear all interrupts */ 845 outw(AckIntr | 0xFF, ioaddr + EL3_CMD); 846 break; 847 } 848 /* Acknowledge the IRQ. */ 849 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); 850 } 851 852 pr_debug("%s: exiting interrupt, status %4.4x.\n", 853 dev->name, inw(ioaddr + EL3_STATUS)); 854 855 spin_unlock(&lp->window_lock); 856 return IRQ_RETVAL(handled); 857} 858 859/* 860 This timer serves two purposes: to check for missed interrupts 861 (and as a last resort, poll the NIC for events), and to monitor 862 the MII, reporting changes in cable status. 863*/ 864static void media_check(unsigned long arg) 865{ 866 struct net_device *dev = (struct net_device *) arg; 867 struct el3_private *lp = netdev_priv(dev); 868 unsigned int ioaddr = dev->base_addr; 869 unsigned long flags; 870 unsigned short /* cable, */ media, partner; 871 872 if (!netif_device_present(dev)) 873 goto reschedule; 874 875 /* Check for pending interrupt with expired latency timer: with 876 this, we can limp along even if the interrupt is blocked */ 877 if ((inw(ioaddr + EL3_STATUS) & IntLatch) && (inb(ioaddr + Timer) == 0xff)) { 878 if (!lp->fast_poll) 879 netdev_info(dev, "interrupt(s) dropped!\n"); 880 881 local_irq_save(flags); 882 el3_interrupt(dev->irq, dev); 883 local_irq_restore(flags); 884 885 lp->fast_poll = HZ; 886 } 887 if (lp->fast_poll) { 888 lp->fast_poll--; 889 lp->media.expires = jiffies + 2*HZ/100; 890 add_timer(&lp->media); 891 return; 892 } 893 894 spin_lock_irqsave(&lp->window_lock, flags); 895 EL3WINDOW(4); 896 media = mdio_read(ioaddr, lp->phys, 1); 897 partner = mdio_read(ioaddr, lp->phys, 5); 898 EL3WINDOW(1); 899 900 if (media != lp->media_status) { 901 if ((media ^ lp->media_status) & 0x0004) 902 netdev_info(dev, "%s link beat\n", 903 (lp->media_status & 0x0004) ? "lost" : "found"); 904 if ((media ^ lp->media_status) & 0x0020) { 905 lp->partner = 0; 906 if (lp->media_status & 0x0020) { 907 netdev_info(dev, "autonegotiation restarted\n"); 908 } else if (partner) { 909 partner &= lp->advertising; 910 lp->partner = partner; 911 netdev_info(dev, "autonegotiation complete: " 912 "%dbaseT-%cD selected\n", 913 (partner & 0x0180) ? 100 : 10, 914 (partner & 0x0140) ? 'F' : 'H'); 915 } else { 916 netdev_info(dev, "link partner did not autonegotiate\n"); 917 } 918 919 EL3WINDOW(3); 920 outb((partner & 0x0140 ? 0x20 : 0) | 921 (dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); 922 EL3WINDOW(1); 923 924 } 925 if (media & 0x0010) 926 netdev_info(dev, "remote fault detected\n"); 927 if (media & 0x0002) 928 netdev_info(dev, "jabber detected\n"); 929 lp->media_status = media; 930 } 931 spin_unlock_irqrestore(&lp->window_lock, flags); 932 933reschedule: 934 lp->media.expires = jiffies + HZ; 935 add_timer(&lp->media); 936} 937 938static struct net_device_stats *el3_get_stats(struct net_device *dev) 939{ 940 struct el3_private *lp = netdev_priv(dev); 941 942 if (netif_device_present(dev)) { 943 unsigned long flags; 944 spin_lock_irqsave(&lp->window_lock, flags); 945 update_stats(dev); 946 spin_unlock_irqrestore(&lp->window_lock, flags); 947 } 948 return &dev->stats; 949} 950 951/* Update statistics. 952 Surprisingly this need not be run single-threaded, but it effectively is. 953 The counters clear when read, so the adds must merely be atomic. 954 */ 955static void update_stats(struct net_device *dev) 956{ 957 unsigned int ioaddr = dev->base_addr; 958 u8 rx, tx, up; 959 960 pr_debug("%s: updating the statistics.\n", dev->name); 961 962 if (inw(ioaddr+EL3_STATUS) == 0xffff) /* No card. */ 963 return; 964 965 /* Unlike the 3c509 we need not turn off stats updates while reading. */ 966 /* Switch to the stats window, and read everything. */ 967 EL3WINDOW(6); 968 dev->stats.tx_carrier_errors += inb(ioaddr + 0); 969 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1); 970 /* Multiple collisions. */ inb(ioaddr + 2); 971 dev->stats.collisions += inb(ioaddr + 3); 972 dev->stats.tx_window_errors += inb(ioaddr + 4); 973 dev->stats.rx_fifo_errors += inb(ioaddr + 5); 974 dev->stats.tx_packets += inb(ioaddr + 6); 975 up = inb(ioaddr + 9); 976 dev->stats.tx_packets += (up&0x30) << 4; 977 /* Rx packets */ inb(ioaddr + 7); 978 /* Tx deferrals */ inb(ioaddr + 8); 979 rx = inw(ioaddr + 10); 980 tx = inw(ioaddr + 12); 981 982 EL3WINDOW(4); 983 /* BadSSD */ inb(ioaddr + 12); 984 up = inb(ioaddr + 13); 985 986 EL3WINDOW(1); 987} 988 989static int el3_rx(struct net_device *dev, int worklimit) 990{ 991 unsigned int ioaddr = dev->base_addr; 992 short rx_status; 993 994 pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n", 995 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus)); 996 while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) && 997 worklimit > 0) { 998 worklimit--; 999 if (rx_status & 0x4000) { /* Error, update stats. */ 1000 short error = rx_status & 0x3800; 1001 dev->stats.rx_errors++; 1002 switch (error) { 1003 case 0x0000: dev->stats.rx_over_errors++; break; 1004 case 0x0800: dev->stats.rx_length_errors++; break; 1005 case 0x1000: dev->stats.rx_frame_errors++; break; 1006 case 0x1800: dev->stats.rx_length_errors++; break; 1007 case 0x2000: dev->stats.rx_frame_errors++; break; 1008 case 0x2800: dev->stats.rx_crc_errors++; break; 1009 } 1010 } else { 1011 short pkt_len = rx_status & 0x7ff; 1012 struct sk_buff *skb; 1013 1014 skb = netdev_alloc_skb(dev, pkt_len + 5); 1015 1016 pr_debug(" Receiving packet size %d status %4.4x.\n", 1017 pkt_len, rx_status); 1018 if (skb != NULL) { 1019 skb_reserve(skb, 2); 1020 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len), 1021 ((pkt_len+3)>>2)); 1022 skb->protocol = eth_type_trans(skb, dev); 1023 netif_rx(skb); 1024 dev->stats.rx_packets++; 1025 dev->stats.rx_bytes += pkt_len; 1026 } else { 1027 pr_debug("%s: couldn't allocate a sk_buff of" 1028 " size %d.\n", dev->name, pkt_len); 1029 dev->stats.rx_dropped++; 1030 } 1031 } 1032 tc574_wait_for_completion(dev, RxDiscard); 1033 } 1034 1035 return worklimit; 1036} 1037 1038/* Provide ioctl() calls to examine the MII xcvr state. */ 1039static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 1040{ 1041 struct el3_private *lp = netdev_priv(dev); 1042 unsigned int ioaddr = dev->base_addr; 1043 struct mii_ioctl_data *data = if_mii(rq); 1044 int phy = lp->phys & 0x1f; 1045 1046 pr_debug("%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n", 1047 dev->name, rq->ifr_ifrn.ifrn_name, cmd, 1048 data->phy_id, data->reg_num, data->val_in, data->val_out); 1049 1050 switch(cmd) { 1051 case SIOCGMIIPHY: /* Get the address of the PHY in use. */ 1052 data->phy_id = phy; 1053 case SIOCGMIIREG: /* Read the specified MII register. */ 1054 { 1055 int saved_window; 1056 unsigned long flags; 1057 1058 spin_lock_irqsave(&lp->window_lock, flags); 1059 saved_window = inw(ioaddr + EL3_CMD) >> 13; 1060 EL3WINDOW(4); 1061 data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f, 1062 data->reg_num & 0x1f); 1063 EL3WINDOW(saved_window); 1064 spin_unlock_irqrestore(&lp->window_lock, flags); 1065 return 0; 1066 } 1067 case SIOCSMIIREG: /* Write the specified MII register */ 1068 { 1069 int saved_window; 1070 unsigned long flags; 1071 1072 spin_lock_irqsave(&lp->window_lock, flags); 1073 saved_window = inw(ioaddr + EL3_CMD) >> 13; 1074 EL3WINDOW(4); 1075 mdio_write(ioaddr, data->phy_id & 0x1f, 1076 data->reg_num & 0x1f, data->val_in); 1077 EL3WINDOW(saved_window); 1078 spin_unlock_irqrestore(&lp->window_lock, flags); 1079 return 0; 1080 } 1081 default: 1082 return -EOPNOTSUPP; 1083 } 1084} 1085 1086/* The Odie chip has a 64 bin multicast filter, but the bit layout is not 1087 documented. Until it is we revert to receiving all multicast frames when 1088 any multicast reception is desired. 1089 Note: My other drivers emit a log message whenever promiscuous mode is 1090 entered to help detect password sniffers. This is less desirable on 1091 typical PC card machines, so we omit the message. 1092 */ 1093 1094static void set_rx_mode(struct net_device *dev) 1095{ 1096 unsigned int ioaddr = dev->base_addr; 1097 1098 if (dev->flags & IFF_PROMISC) 1099 outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm, 1100 ioaddr + EL3_CMD); 1101 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI)) 1102 outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD); 1103 else 1104 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD); 1105} 1106 1107static void set_multicast_list(struct net_device *dev) 1108{ 1109 struct el3_private *lp = netdev_priv(dev); 1110 unsigned long flags; 1111 1112 spin_lock_irqsave(&lp->window_lock, flags); 1113 set_rx_mode(dev); 1114 spin_unlock_irqrestore(&lp->window_lock, flags); 1115} 1116 1117static int el3_close(struct net_device *dev) 1118{ 1119 unsigned int ioaddr = dev->base_addr; 1120 struct el3_private *lp = netdev_priv(dev); 1121 struct pcmcia_device *link = lp->p_dev; 1122 1123 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name); 1124 1125 if (pcmcia_dev_present(link)) { 1126 unsigned long flags; 1127 1128 /* Turn off statistics ASAP. We update lp->stats below. */ 1129 outw(StatsDisable, ioaddr + EL3_CMD); 1130 1131 /* Disable the receiver and transmitter. */ 1132 outw(RxDisable, ioaddr + EL3_CMD); 1133 outw(TxDisable, ioaddr + EL3_CMD); 1134 1135 /* Note: Switching to window 0 may disable the IRQ. */ 1136 EL3WINDOW(0); 1137 spin_lock_irqsave(&lp->window_lock, flags); 1138 update_stats(dev); 1139 spin_unlock_irqrestore(&lp->window_lock, flags); 1140 1141 /* force interrupts off */ 1142 outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD); 1143 } 1144 1145 link->open--; 1146 netif_stop_queue(dev); 1147 del_timer_sync(&lp->media); 1148 1149 return 0; 1150} 1151 1152static const struct pcmcia_device_id tc574_ids[] = { 1153 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574), 1154 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "cis/3CCFEM556.cis"), 1155 PCMCIA_DEVICE_NULL, 1156}; 1157MODULE_DEVICE_TABLE(pcmcia, tc574_ids); 1158 1159static struct pcmcia_driver tc574_driver = { 1160 .owner = THIS_MODULE, 1161 .name = "3c574_cs", 1162 .probe = tc574_probe, 1163 .remove = tc574_detach, 1164 .id_table = tc574_ids, 1165 .suspend = tc574_suspend, 1166 .resume = tc574_resume, 1167}; 1168 1169static int __init init_tc574(void) 1170{ 1171 return pcmcia_register_driver(&tc574_driver); 1172} 1173 1174static void __exit exit_tc574(void) 1175{ 1176 pcmcia_unregister_driver(&tc574_driver); 1177} 1178 1179module_init(init_tc574); 1180module_exit(exit_tc574); 1181