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