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/pf/DP/DP83840.html 66 67Thanks to Terry Murphy of 3Com for providing development information for 68earlier 3Com products. 69 70*/ 71 72#include <linux/module.h> 73#include <linux/kernel.h> 74#include <linux/init.h> 75#include <linux/slab.h> 76#include <linux/string.h> 77#include <linux/timer.h> 78#include <linux/interrupt.h> 79#include <linux/in.h> 80#include <linux/delay.h> 81#include <linux/netdevice.h> 82#include <linux/etherdevice.h> 83#include <linux/skbuff.h> 84#include <linux/if_arp.h> 85#include <linux/ioport.h> 86#include <linux/ethtool.h> 87#include <linux/bitops.h> 88 89#include <pcmcia/cs_types.h> 90#include <pcmcia/cs.h> 91#include <pcmcia/cistpl.h> 92#include <pcmcia/cisreg.h> 93#include <pcmcia/ciscode.h> 94#include <pcmcia/ds.h> 95#include <pcmcia/mem_op.h> 96 97#include <asm/uaccess.h> 98#include <asm/io.h> 99#include <asm/system.h> 100 101/*====================================================================*/ 102 103/* Module parameters */ 104 105MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 106MODULE_DESCRIPTION("3Com 3c574 series PCMCIA ethernet driver"); 107MODULE_LICENSE("GPL"); 108 109#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) 110 111/* Maximum events (Rx packets, etc.) to handle at each interrupt. */ 112INT_MODULE_PARM(max_interrupt_work, 32); 113 114/* Force full duplex modes? */ 115INT_MODULE_PARM(full_duplex, 0); 116 117/* Autodetect link polarity reversal? */ 118INT_MODULE_PARM(auto_polarity, 1); 119 120#ifdef PCMCIA_DEBUG 121INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG); 122#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) 123static char *version = 124"3c574_cs.c 1.65ac1 2003/04/07 Donald Becker/David Hinds, becker@scyld.com.\n"; 125#else 126#define DEBUG(n, args...) 127#endif 128 129/*====================================================================*/ 130 131/* Time in jiffies before concluding the transmitter is hung. */ 132#define TX_TIMEOUT ((800*HZ)/1000) 133 134/* To minimize the size of the driver source and make the driver more 135 readable not all constants are symbolically defined. 136 You'll need the manual if you want to understand driver details anyway. */ 137/* Offsets from base I/O address. */ 138#define EL3_DATA 0x00 139#define EL3_CMD 0x0e 140#define EL3_STATUS 0x0e 141 142#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD) 143 144/* The top five bits written to EL3_CMD are a command, the lower 145 11 bits are the parameter, if applicable. */ 146enum el3_cmds { 147 TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11, 148 RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11, 149 TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11, 150 FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11, 151 SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11, 152 SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11, 153 StatsDisable = 22<<11, StopCoax = 23<<11, 154}; 155 156enum elxl_status { 157 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004, 158 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020, 159 IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000 }; 160 161/* The SetRxFilter command accepts the following classes: */ 162enum RxFilter { 163 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8 164}; 165 166enum Window0 { 167 Wn0EepromCmd = 10, Wn0EepromData = 12, /* EEPROM command/address, data. */ 168 IntrStatus=0x0E, /* Valid in all windows. */ 169}; 170/* These assumes the larger EEPROM. */ 171enum Win0_EEPROM_cmds { 172 EEPROM_Read = 0x200, EEPROM_WRITE = 0x100, EEPROM_ERASE = 0x300, 173 EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */ 174 EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */ 175}; 176 177/* Register window 1 offsets, the window used in normal operation. 178 On the "Odie" this window is always mapped at offsets 0x10-0x1f. 179 Except for TxFree, which is overlapped by RunnerWrCtrl. */ 180enum Window1 { 181 TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14, 182 RxStatus = 0x18, Timer=0x1A, TxStatus = 0x1B, 183 TxFree = 0x0C, /* Remaining free bytes in Tx buffer. */ 184 RunnerRdCtrl = 0x16, RunnerWrCtrl = 0x1c, 185}; 186 187enum Window3 { /* Window 3: MAC/config bits. */ 188 Wn3_Config=0, Wn3_MAC_Ctrl=6, Wn3_Options=8, 189}; 190union wn3_config { 191 int i; 192 struct w3_config_fields { 193 unsigned int ram_size:3, ram_width:1, ram_speed:2, rom_size:2; 194 int pad8:8; 195 unsigned int ram_split:2, pad18:2, xcvr:3, pad21:1, autoselect:1; 196 int pad24:7; 197 } u; 198}; 199 200enum Window4 { /* Window 4: Xcvr/media bits. */ 201 Wn4_FIFODiag = 4, Wn4_NetDiag = 6, Wn4_PhysicalMgmt=8, Wn4_Media = 10, 202}; 203 204#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */ 205 206struct el3_private { 207 struct pcmcia_device *p_dev; 208 dev_node_t node; 209 struct net_device_stats stats; 210 u16 advertising, partner; /* NWay media advertisement */ 211 unsigned char phys; /* MII device address */ 212 unsigned int autoselect:1, default_media:3; /* Read from the EEPROM/Wn3_Config. */ 213 /* for transceiver monitoring */ 214 struct timer_list media; 215 unsigned short media_status; 216 unsigned short fast_poll; 217 unsigned long last_irq; 218 spinlock_t window_lock; /* Guards the Window selection */ 219}; 220 221/* Set iff a MII transceiver on any interface requires mdio preamble. 222 This only set with the original DP83840 on older 3c905 boards, so the extra 223 code size of a per-interface flag is not worthwhile. */ 224static char mii_preamble_required = 0; 225 226/* Index of functions. */ 227 228static int tc574_config(struct pcmcia_device *link); 229static void tc574_release(struct pcmcia_device *link); 230 231static void mdio_sync(kio_addr_t ioaddr, int bits); 232static int mdio_read(kio_addr_t ioaddr, int phy_id, int location); 233static void mdio_write(kio_addr_t ioaddr, int phy_id, int location, int value); 234static unsigned short read_eeprom(kio_addr_t ioaddr, int index); 235static void tc574_wait_for_completion(struct net_device *dev, int cmd); 236 237static void tc574_reset(struct net_device *dev); 238static void media_check(unsigned long arg); 239static int el3_open(struct net_device *dev); 240static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev); 241static irqreturn_t el3_interrupt(int irq, void *dev_id); 242static void update_stats(struct net_device *dev); 243static struct net_device_stats *el3_get_stats(struct net_device *dev); 244static int el3_rx(struct net_device *dev, int worklimit); 245static int el3_close(struct net_device *dev); 246static void el3_tx_timeout(struct net_device *dev); 247static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 248static const struct ethtool_ops netdev_ethtool_ops; 249static void set_rx_mode(struct net_device *dev); 250 251static void tc574_detach(struct pcmcia_device *p_dev); 252 253/* 254 tc574_attach() creates an "instance" of the driver, allocating 255 local data structures for one device. The device is registered 256 with Card Services. 257*/ 258 259static int tc574_probe(struct pcmcia_device *link) 260{ 261 struct el3_private *lp; 262 struct net_device *dev; 263 264 DEBUG(0, "3c574_attach()\n"); 265 266 /* Create the PC card device object. */ 267 dev = alloc_etherdev(sizeof(struct el3_private)); 268 if (!dev) 269 return -ENOMEM; 270 lp = netdev_priv(dev); 271 link->priv = dev; 272 lp->p_dev = link; 273 274 spin_lock_init(&lp->window_lock); 275 link->io.NumPorts1 = 32; 276 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; 277 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT; 278 link->irq.IRQInfo1 = IRQ_LEVEL_ID; 279 link->irq.Handler = &el3_interrupt; 280 link->irq.Instance = dev; 281 link->conf.Attributes = CONF_ENABLE_IRQ; 282 link->conf.IntType = INT_MEMORY_AND_IO; 283 link->conf.ConfigIndex = 1; 284 285 /* The EL3-specific entries in the device structure. */ 286 dev->hard_start_xmit = &el3_start_xmit; 287 dev->get_stats = &el3_get_stats; 288 dev->do_ioctl = &el3_ioctl; 289 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops); 290 dev->set_multicast_list = &set_rx_mode; 291 dev->open = &el3_open; 292 dev->stop = &el3_close; 293#ifdef HAVE_TX_TIMEOUT 294 dev->tx_timeout = el3_tx_timeout; 295 dev->watchdog_timeo = TX_TIMEOUT; 296#endif 297 298 return tc574_config(link); 299} /* tc574_attach */ 300 301/* 302 303 This deletes a driver "instance". The device is de-registered 304 with Card Services. If it has been released, all local data 305 structures are freed. Otherwise, the structures will be freed 306 when the device is released. 307 308*/ 309 310static void tc574_detach(struct pcmcia_device *link) 311{ 312 struct net_device *dev = link->priv; 313 314 DEBUG(0, "3c574_detach(0x%p)\n", link); 315 316 if (link->dev_node) 317 unregister_netdev(dev); 318 319 tc574_release(link); 320 321 free_netdev(dev); 322} /* tc574_detach */ 323 324/* 325 tc574_config() is scheduled to run after a CARD_INSERTION event 326 is received, to configure the PCMCIA socket, and to make the 327 ethernet device available to the system. 328*/ 329 330#define CS_CHECK(fn, ret) \ 331 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) 332 333static const char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"}; 334 335static int tc574_config(struct pcmcia_device *link) 336{ 337 struct net_device *dev = link->priv; 338 struct el3_private *lp = netdev_priv(dev); 339 tuple_t tuple; 340 unsigned short buf[32]; 341 int last_fn, last_ret, i, j; 342 kio_addr_t ioaddr; 343 u16 *phys_addr; 344 char *cardname; 345 union wn3_config config; 346 347 phys_addr = (u16 *)dev->dev_addr; 348 349 DEBUG(0, "3c574_config(0x%p)\n", link); 350 351 link->io.IOAddrLines = 16; 352 for (i = j = 0; j < 0x400; j += 0x20) { 353 link->io.BasePort1 = j ^ 0x300; 354 i = pcmcia_request_io(link, &link->io); 355 if (i == CS_SUCCESS) break; 356 } 357 if (i != CS_SUCCESS) { 358 cs_error(link, RequestIO, i); 359 goto failed; 360 } 361 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq)); 362 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf)); 363 364 dev->irq = link->irq.AssignedIRQ; 365 dev->base_addr = link->io.BasePort1; 366 367 ioaddr = dev->base_addr; 368 369 /* The 3c574 normally uses an EEPROM for configuration info, including 370 the hardware address. The future products may include a modem chip 371 and put the address in the CIS. */ 372 tuple.Attributes = 0; 373 tuple.TupleData = (cisdata_t *)buf; 374 tuple.TupleDataMax = 64; 375 tuple.TupleOffset = 0; 376 tuple.DesiredTuple = 0x88; 377 if (pcmcia_get_first_tuple(link, &tuple) == CS_SUCCESS) { 378 pcmcia_get_tuple_data(link, &tuple); 379 for (i = 0; i < 3; i++) 380 phys_addr[i] = htons(buf[i]); 381 } else { 382 EL3WINDOW(0); 383 for (i = 0; i < 3; i++) 384 phys_addr[i] = htons(read_eeprom(ioaddr, i + 10)); 385 if (phys_addr[0] == 0x6060) { 386 printk(KERN_NOTICE "3c574_cs: IO port conflict at 0x%03lx" 387 "-0x%03lx\n", dev->base_addr, dev->base_addr+15); 388 goto failed; 389 } 390 } 391 if (link->prod_id[1]) 392 cardname = link->prod_id[1]; 393 else 394 cardname = "3Com 3c574"; 395 396 { 397 u_char mcr; 398 outw(2<<11, ioaddr + RunnerRdCtrl); 399 mcr = inb(ioaddr + 2); 400 outw(0<<11, ioaddr + RunnerRdCtrl); 401 printk(KERN_INFO " ASIC rev %d,", mcr>>3); 402 EL3WINDOW(3); 403 config.i = inl(ioaddr + Wn3_Config); 404 lp->default_media = config.u.xcvr; 405 lp->autoselect = config.u.autoselect; 406 } 407 408 init_timer(&lp->media); 409 410 { 411 int phy; 412 413 /* Roadrunner only: Turn on the MII transceiver */ 414 outw(0x8040, ioaddr + Wn3_Options); 415 mdelay(1); 416 outw(0xc040, ioaddr + Wn3_Options); 417 tc574_wait_for_completion(dev, TxReset); 418 tc574_wait_for_completion(dev, RxReset); 419 mdelay(1); 420 outw(0x8040, ioaddr + Wn3_Options); 421 422 EL3WINDOW(4); 423 for (phy = 1; phy <= 32; phy++) { 424 int mii_status; 425 mdio_sync(ioaddr, 32); 426 mii_status = mdio_read(ioaddr, phy & 0x1f, 1); 427 if (mii_status != 0xffff) { 428 lp->phys = phy & 0x1f; 429 DEBUG(0, " MII transceiver at index %d, status %x.\n", 430 phy, mii_status); 431 if ((mii_status & 0x0040) == 0) 432 mii_preamble_required = 1; 433 break; 434 } 435 } 436 if (phy > 32) { 437 printk(KERN_NOTICE " No MII transceivers found!\n"); 438 goto failed; 439 } 440 i = mdio_read(ioaddr, lp->phys, 16) | 0x40; 441 mdio_write(ioaddr, lp->phys, 16, i); 442 lp->advertising = mdio_read(ioaddr, lp->phys, 4); 443 if (full_duplex) { 444 /* Only advertise the FD media types. */ 445 lp->advertising &= ~0x02a0; 446 mdio_write(ioaddr, lp->phys, 4, lp->advertising); 447 } 448 } 449 450 link->dev_node = &lp->node; 451 SET_NETDEV_DEV(dev, &handle_to_dev(link)); 452 453 if (register_netdev(dev) != 0) { 454 printk(KERN_NOTICE "3c574_cs: register_netdev() failed\n"); 455 link->dev_node = NULL; 456 goto failed; 457 } 458 459 strcpy(lp->node.dev_name, dev->name); 460 461 printk(KERN_INFO "%s: %s at io %#3lx, irq %d, hw_addr ", 462 dev->name, cardname, dev->base_addr, dev->irq); 463 for (i = 0; i < 6; i++) 464 printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : ".\n")); 465 printk(" %dK FIFO split %s Rx:Tx, %sMII interface.\n", 466 8 << config.u.ram_size, ram_split[config.u.ram_split], 467 config.u.autoselect ? "autoselect " : ""); 468 469 return 0; 470 471cs_failed: 472 cs_error(link, last_fn, last_ret); 473failed: 474 tc574_release(link); 475 return -ENODEV; 476 477} /* tc574_config */ 478 479/* 480 After a card is removed, tc574_release() will unregister the net 481 device, and release the PCMCIA configuration. If the device is 482 still open, this will be postponed until it is closed. 483*/ 484 485static void tc574_release(struct pcmcia_device *link) 486{ 487 pcmcia_disable_device(link); 488} 489 490static int tc574_suspend(struct pcmcia_device *link) 491{ 492 struct net_device *dev = link->priv; 493 494 if (link->open) 495 netif_device_detach(dev); 496 497 return 0; 498} 499 500static int tc574_resume(struct pcmcia_device *link) 501{ 502 struct net_device *dev = link->priv; 503 504 if (link->open) { 505 tc574_reset(dev); 506 netif_device_attach(dev); 507 } 508 509 return 0; 510} 511 512static void dump_status(struct net_device *dev) 513{ 514 kio_addr_t ioaddr = dev->base_addr; 515 EL3WINDOW(1); 516 printk(KERN_INFO " irq status %04x, rx status %04x, tx status " 517 "%02x, tx free %04x\n", inw(ioaddr+EL3_STATUS), 518 inw(ioaddr+RxStatus), inb(ioaddr+TxStatus), 519 inw(ioaddr+TxFree)); 520 EL3WINDOW(4); 521 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x" 522 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06), 523 inw(ioaddr+0x08), inw(ioaddr+0x0a)); 524 EL3WINDOW(1); 525} 526 527/* 528 Use this for commands that may take time to finish 529*/ 530static void tc574_wait_for_completion(struct net_device *dev, int cmd) 531{ 532 int i = 1500; 533 outw(cmd, dev->base_addr + EL3_CMD); 534 while (--i > 0) 535 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break; 536 if (i == 0) 537 printk(KERN_NOTICE "%s: command 0x%04x did not complete!\n", dev->name, cmd); 538} 539 540/* Read a word from the EEPROM using the regular EEPROM access register. 541 Assume that we are in register window zero. 542 */ 543static unsigned short read_eeprom(kio_addr_t ioaddr, int index) 544{ 545 int timer; 546 outw(EEPROM_Read + index, ioaddr + Wn0EepromCmd); 547 /* Pause for at least 162 usec for the read to take place. */ 548 for (timer = 1620; timer >= 0; timer--) { 549 if ((inw(ioaddr + Wn0EepromCmd) & 0x8000) == 0) 550 break; 551 } 552 return inw(ioaddr + Wn0EepromData); 553} 554 555/* MII transceiver control section. 556 Read and write the MII registers using software-generated serial 557 MDIO protocol. See the MII specifications or DP83840A data sheet 558 for details. 559 The maxium data clock rate is 2.5 Mhz. The timing is easily met by the 560 slow PC card interface. */ 561 562#define MDIO_SHIFT_CLK 0x01 563#define MDIO_DIR_WRITE 0x04 564#define MDIO_DATA_WRITE0 (0x00 | MDIO_DIR_WRITE) 565#define MDIO_DATA_WRITE1 (0x02 | MDIO_DIR_WRITE) 566#define MDIO_DATA_READ 0x02 567#define MDIO_ENB_IN 0x00 568 569/* Generate the preamble required for initial synchronization and 570 a few older transceivers. */ 571static void mdio_sync(kio_addr_t ioaddr, int bits) 572{ 573 kio_addr_t mdio_addr = ioaddr + Wn4_PhysicalMgmt; 574 575 /* Establish sync by sending at least 32 logic ones. */ 576 while (-- bits >= 0) { 577 outw(MDIO_DATA_WRITE1, mdio_addr); 578 outw(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr); 579 } 580} 581 582static int mdio_read(kio_addr_t ioaddr, int phy_id, int location) 583{ 584 int i; 585 int read_cmd = (0xf6 << 10) | (phy_id << 5) | location; 586 unsigned int retval = 0; 587 kio_addr_t mdio_addr = ioaddr + Wn4_PhysicalMgmt; 588 589 if (mii_preamble_required) 590 mdio_sync(ioaddr, 32); 591 592 /* Shift the read command bits out. */ 593 for (i = 14; i >= 0; i--) { 594 int dataval = (read_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; 595 outw(dataval, mdio_addr); 596 outw(dataval | MDIO_SHIFT_CLK, mdio_addr); 597 } 598 /* Read the two transition, 16 data, and wire-idle bits. */ 599 for (i = 19; i > 0; i--) { 600 outw(MDIO_ENB_IN, mdio_addr); 601 retval = (retval << 1) | ((inw(mdio_addr) & MDIO_DATA_READ) ? 1 : 0); 602 outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); 603 } 604 return (retval>>1) & 0xffff; 605} 606 607static void mdio_write(kio_addr_t ioaddr, int phy_id, int location, int value) 608{ 609 int write_cmd = 0x50020000 | (phy_id << 23) | (location << 18) | value; 610 kio_addr_t mdio_addr = ioaddr + Wn4_PhysicalMgmt; 611 int i; 612 613 if (mii_preamble_required) 614 mdio_sync(ioaddr, 32); 615 616 /* Shift the command bits out. */ 617 for (i = 31; i >= 0; i--) { 618 int dataval = (write_cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; 619 outw(dataval, mdio_addr); 620 outw(dataval | MDIO_SHIFT_CLK, mdio_addr); 621 } 622 /* Leave the interface idle. */ 623 for (i = 1; i >= 0; i--) { 624 outw(MDIO_ENB_IN, mdio_addr); 625 outw(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr); 626 } 627 628 return; 629} 630 631/* Reset and restore all of the 3c574 registers. */ 632static void tc574_reset(struct net_device *dev) 633{ 634 struct el3_private *lp = netdev_priv(dev); 635 int i; 636 kio_addr_t ioaddr = dev->base_addr; 637 unsigned long flags; 638 639 tc574_wait_for_completion(dev, TotalReset|0x10); 640 641 spin_lock_irqsave(&lp->window_lock, flags); 642 /* Clear any transactions in progress. */ 643 outw(0, ioaddr + RunnerWrCtrl); 644 outw(0, ioaddr + RunnerRdCtrl); 645 646 /* Set the station address and mask. */ 647 EL3WINDOW(2); 648 for (i = 0; i < 6; i++) 649 outb(dev->dev_addr[i], ioaddr + i); 650 for (; i < 12; i+=2) 651 outw(0, ioaddr + i); 652 653 /* Reset config options */ 654 EL3WINDOW(3); 655 outb((dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); 656 outl((lp->autoselect ? 0x01000000 : 0) | 0x0062001b, 657 ioaddr + Wn3_Config); 658 /* Roadrunner only: Turn on the MII transceiver. */ 659 outw(0x8040, ioaddr + Wn3_Options); 660 mdelay(1); 661 outw(0xc040, ioaddr + Wn3_Options); 662 EL3WINDOW(1); 663 spin_unlock_irqrestore(&lp->window_lock, flags); 664 665 tc574_wait_for_completion(dev, TxReset); 666 tc574_wait_for_completion(dev, RxReset); 667 mdelay(1); 668 spin_lock_irqsave(&lp->window_lock, flags); 669 EL3WINDOW(3); 670 outw(0x8040, ioaddr + Wn3_Options); 671 672 /* Switch to the stats window, and clear all stats by reading. */ 673 outw(StatsDisable, ioaddr + EL3_CMD); 674 EL3WINDOW(6); 675 for (i = 0; i < 10; i++) 676 inb(ioaddr + i); 677 inw(ioaddr + 10); 678 inw(ioaddr + 12); 679 EL3WINDOW(4); 680 inb(ioaddr + 12); 681 inb(ioaddr + 13); 682 683 /* .. enable any extra statistics bits.. */ 684 outw(0x0040, ioaddr + Wn4_NetDiag); 685 686 EL3WINDOW(1); 687 spin_unlock_irqrestore(&lp->window_lock, flags); 688 689 /* .. re-sync MII and re-fill what NWay is advertising. */ 690 mdio_sync(ioaddr, 32); 691 mdio_write(ioaddr, lp->phys, 4, lp->advertising); 692 if (!auto_polarity) { 693 /* works for TDK 78Q2120 series MII's */ 694 int i = mdio_read(ioaddr, lp->phys, 16) | 0x20; 695 mdio_write(ioaddr, lp->phys, 16, i); 696 } 697 698 spin_lock_irqsave(&lp->window_lock, flags); 699 /* Switch to register set 1 for normal use, just for TxFree. */ 700 set_rx_mode(dev); 701 spin_unlock_irqrestore(&lp->window_lock, flags); 702 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */ 703 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */ 704 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */ 705 /* Allow status bits to be seen. */ 706 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD); 707 /* Ack all pending events, and set active indicator mask. */ 708 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq, 709 ioaddr + EL3_CMD); 710 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull 711 | AdapterFailure | RxEarly, ioaddr + EL3_CMD); 712} 713 714static int el3_open(struct net_device *dev) 715{ 716 struct el3_private *lp = netdev_priv(dev); 717 struct pcmcia_device *link = lp->p_dev; 718 719 if (!pcmcia_dev_present(link)) 720 return -ENODEV; 721 722 link->open++; 723 netif_start_queue(dev); 724 725 tc574_reset(dev); 726 lp->media.function = &media_check; 727 lp->media.data = (unsigned long) dev; 728 lp->media.expires = jiffies + HZ; 729 add_timer(&lp->media); 730 731 DEBUG(2, "%s: opened, status %4.4x.\n", 732 dev->name, inw(dev->base_addr + EL3_STATUS)); 733 734 return 0; 735} 736 737static void el3_tx_timeout(struct net_device *dev) 738{ 739 struct el3_private *lp = netdev_priv(dev); 740 kio_addr_t ioaddr = dev->base_addr; 741 742 printk(KERN_NOTICE "%s: Transmit timed out!\n", dev->name); 743 dump_status(dev); 744 lp->stats.tx_errors++; 745 dev->trans_start = jiffies; 746 /* Issue TX_RESET and TX_START commands. */ 747 tc574_wait_for_completion(dev, TxReset); 748 outw(TxEnable, ioaddr + EL3_CMD); 749 netif_wake_queue(dev); 750} 751 752static void pop_tx_status(struct net_device *dev) 753{ 754 struct el3_private *lp = netdev_priv(dev); 755 kio_addr_t ioaddr = dev->base_addr; 756 int i; 757 758 /* Clear the Tx status stack. */ 759 for (i = 32; i > 0; i--) { 760 u_char tx_status = inb(ioaddr + TxStatus); 761 if (!(tx_status & 0x84)) 762 break; 763 /* reset transmitter on jabber error or underrun */ 764 if (tx_status & 0x30) 765 tc574_wait_for_completion(dev, TxReset); 766 if (tx_status & 0x38) { 767 DEBUG(1, "%s: transmit error: status 0x%02x\n", 768 dev->name, tx_status); 769 outw(TxEnable, ioaddr + EL3_CMD); 770 lp->stats.tx_aborted_errors++; 771 } 772 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */ 773 } 774} 775 776static int el3_start_xmit(struct sk_buff *skb, struct net_device *dev) 777{ 778 kio_addr_t ioaddr = dev->base_addr; 779 struct el3_private *lp = netdev_priv(dev); 780 unsigned long flags; 781 782 DEBUG(3, "%s: el3_start_xmit(length = %ld) called, " 783 "status %4.4x.\n", dev->name, (long)skb->len, 784 inw(ioaddr + EL3_STATUS)); 785 786 spin_lock_irqsave(&lp->window_lock, flags); 787 outw(skb->len, ioaddr + TX_FIFO); 788 outw(0, ioaddr + TX_FIFO); 789 outsl(ioaddr + TX_FIFO, skb->data, (skb->len+3)>>2); 790 791 dev->trans_start = jiffies; 792 793 /* TxFree appears only in Window 1, not offset 0x1c. */ 794 if (inw(ioaddr + TxFree) <= 1536) { 795 netif_stop_queue(dev); 796 /* Interrupt us when the FIFO has room for max-sized packet. 797 The threshold is in units of dwords. */ 798 outw(SetTxThreshold + (1536>>2), ioaddr + EL3_CMD); 799 } 800 801 pop_tx_status(dev); 802 spin_unlock_irqrestore(&lp->window_lock, flags); 803 dev_kfree_skb(skb); 804 return 0; 805} 806 807/* The EL3 interrupt handler. */ 808static irqreturn_t el3_interrupt(int irq, void *dev_id) 809{ 810 struct net_device *dev = (struct net_device *) dev_id; 811 struct el3_private *lp = netdev_priv(dev); 812 kio_addr_t ioaddr; 813 unsigned status; 814 int work_budget = max_interrupt_work; 815 int handled = 0; 816 817 if (!netif_device_present(dev)) 818 return IRQ_NONE; 819 ioaddr = dev->base_addr; 820 821 DEBUG(3, "%s: interrupt, status %4.4x.\n", 822 dev->name, inw(ioaddr + EL3_STATUS)); 823 824 spin_lock(&lp->window_lock); 825 826 while ((status = inw(ioaddr + EL3_STATUS)) & 827 (IntLatch | RxComplete | RxEarly | StatsFull)) { 828 if (!netif_device_present(dev) || 829 ((status & 0xe000) != 0x2000)) { 830 DEBUG(1, "%s: Interrupt from dead card\n", dev->name); 831 break; 832 } 833 834 handled = 1; 835 836 if (status & RxComplete) 837 work_budget = el3_rx(dev, work_budget); 838 839 if (status & TxAvailable) { 840 DEBUG(3, " TX room bit was handled.\n"); 841 /* There's room in the FIFO for a full-sized packet. */ 842 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD); 843 netif_wake_queue(dev); 844 } 845 846 if (status & TxComplete) 847 pop_tx_status(dev); 848 849 if (status & (AdapterFailure | RxEarly | StatsFull)) { 850 /* Handle all uncommon interrupts. */ 851 if (status & StatsFull) 852 update_stats(dev); 853 if (status & RxEarly) { 854 work_budget = el3_rx(dev, work_budget); 855 outw(AckIntr | RxEarly, ioaddr + EL3_CMD); 856 } 857 if (status & AdapterFailure) { 858 u16 fifo_diag; 859 EL3WINDOW(4); 860 fifo_diag = inw(ioaddr + Wn4_FIFODiag); 861 EL3WINDOW(1); 862 printk(KERN_NOTICE "%s: adapter failure, FIFO diagnostic" 863 " register %04x.\n", dev->name, fifo_diag); 864 if (fifo_diag & 0x0400) { 865 /* Tx overrun */ 866 tc574_wait_for_completion(dev, TxReset); 867 outw(TxEnable, ioaddr + EL3_CMD); 868 } 869 if (fifo_diag & 0x2000) { 870 /* Rx underrun */ 871 tc574_wait_for_completion(dev, RxReset); 872 set_rx_mode(dev); 873 outw(RxEnable, ioaddr + EL3_CMD); 874 } 875 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD); 876 } 877 } 878 879 if (--work_budget < 0) { 880 DEBUG(0, "%s: Too much work in interrupt, " 881 "status %4.4x.\n", dev->name, status); 882 /* Clear all interrupts */ 883 outw(AckIntr | 0xFF, ioaddr + EL3_CMD); 884 break; 885 } 886 /* Acknowledge the IRQ. */ 887 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); 888 } 889 890 DEBUG(3, "%s: exiting interrupt, status %4.4x.\n", 891 dev->name, inw(ioaddr + EL3_STATUS)); 892 893 spin_unlock(&lp->window_lock); 894 return IRQ_RETVAL(handled); 895} 896 897/* 898 This timer serves two purposes: to check for missed interrupts 899 (and as a last resort, poll the NIC for events), and to monitor 900 the MII, reporting changes in cable status. 901*/ 902static void media_check(unsigned long arg) 903{ 904 struct net_device *dev = (struct net_device *) arg; 905 struct el3_private *lp = netdev_priv(dev); 906 kio_addr_t ioaddr = dev->base_addr; 907 unsigned long flags; 908 unsigned short /* cable, */ media, partner; 909 910 if (!netif_device_present(dev)) 911 goto reschedule; 912 913 /* Check for pending interrupt with expired latency timer: with 914 this, we can limp along even if the interrupt is blocked */ 915 if ((inw(ioaddr + EL3_STATUS) & IntLatch) && (inb(ioaddr + Timer) == 0xff)) { 916 if (!lp->fast_poll) 917 printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name); 918 el3_interrupt(dev->irq, dev); 919 lp->fast_poll = HZ; 920 } 921 if (lp->fast_poll) { 922 lp->fast_poll--; 923 lp->media.expires = jiffies + 2*HZ/100; 924 add_timer(&lp->media); 925 return; 926 } 927 928 spin_lock_irqsave(&lp->window_lock, flags); 929 EL3WINDOW(4); 930 media = mdio_read(ioaddr, lp->phys, 1); 931 partner = mdio_read(ioaddr, lp->phys, 5); 932 EL3WINDOW(1); 933 934 if (media != lp->media_status) { 935 if ((media ^ lp->media_status) & 0x0004) 936 printk(KERN_INFO "%s: %s link beat\n", dev->name, 937 (lp->media_status & 0x0004) ? "lost" : "found"); 938 if ((media ^ lp->media_status) & 0x0020) { 939 lp->partner = 0; 940 if (lp->media_status & 0x0020) { 941 printk(KERN_INFO "%s: autonegotiation restarted\n", 942 dev->name); 943 } else if (partner) { 944 partner &= lp->advertising; 945 lp->partner = partner; 946 printk(KERN_INFO "%s: autonegotiation complete: " 947 "%sbaseT-%cD selected\n", dev->name, 948 ((partner & 0x0180) ? "100" : "10"), 949 ((partner & 0x0140) ? 'F' : 'H')); 950 } else { 951 printk(KERN_INFO "%s: link partner did not autonegotiate\n", 952 dev->name); 953 } 954 955 EL3WINDOW(3); 956 outb((partner & 0x0140 ? 0x20 : 0) | 957 (dev->mtu > 1500 ? 0x40 : 0), ioaddr + Wn3_MAC_Ctrl); 958 EL3WINDOW(1); 959 960 } 961 if (media & 0x0010) 962 printk(KERN_INFO "%s: remote fault detected\n", 963 dev->name); 964 if (media & 0x0002) 965 printk(KERN_INFO "%s: jabber detected\n", dev->name); 966 lp->media_status = media; 967 } 968 spin_unlock_irqrestore(&lp->window_lock, flags); 969 970reschedule: 971 lp->media.expires = jiffies + HZ; 972 add_timer(&lp->media); 973} 974 975static struct net_device_stats *el3_get_stats(struct net_device *dev) 976{ 977 struct el3_private *lp = netdev_priv(dev); 978 979 if (netif_device_present(dev)) { 980 unsigned long flags; 981 spin_lock_irqsave(&lp->window_lock, flags); 982 update_stats(dev); 983 spin_unlock_irqrestore(&lp->window_lock, flags); 984 } 985 return &lp->stats; 986} 987 988/* Update statistics. 989 Suprisingly this need not be run single-threaded, but it effectively is. 990 The counters clear when read, so the adds must merely be atomic. 991 */ 992static void update_stats(struct net_device *dev) 993{ 994 struct el3_private *lp = netdev_priv(dev); 995 kio_addr_t ioaddr = dev->base_addr; 996 u8 rx, tx, up; 997 998 DEBUG(2, "%s: updating the statistics.\n", dev->name); 999 1000 if (inw(ioaddr+EL3_STATUS) == 0xffff) /* No card. */ 1001 return; 1002 1003 /* Unlike the 3c509 we need not turn off stats updates while reading. */ 1004 /* Switch to the stats window, and read everything. */ 1005 EL3WINDOW(6); 1006 lp->stats.tx_carrier_errors += inb(ioaddr + 0); 1007 lp->stats.tx_heartbeat_errors += inb(ioaddr + 1); 1008 /* Multiple collisions. */ inb(ioaddr + 2); 1009 lp->stats.collisions += inb(ioaddr + 3); 1010 lp->stats.tx_window_errors += inb(ioaddr + 4); 1011 lp->stats.rx_fifo_errors += inb(ioaddr + 5); 1012 lp->stats.tx_packets += inb(ioaddr + 6); 1013 up = inb(ioaddr + 9); 1014 lp->stats.tx_packets += (up&0x30) << 4; 1015 /* Rx packets */ inb(ioaddr + 7); 1016 /* Tx deferrals */ inb(ioaddr + 8); 1017 rx = inw(ioaddr + 10); 1018 tx = inw(ioaddr + 12); 1019 1020 EL3WINDOW(4); 1021 /* BadSSD */ inb(ioaddr + 12); 1022 up = inb(ioaddr + 13); 1023 1024 lp->stats.tx_bytes += tx + ((up & 0xf0) << 12); 1025 1026 EL3WINDOW(1); 1027} 1028 1029static int el3_rx(struct net_device *dev, int worklimit) 1030{ 1031 struct el3_private *lp = netdev_priv(dev); 1032 kio_addr_t ioaddr = dev->base_addr; 1033 short rx_status; 1034 1035 DEBUG(3, "%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n", 1036 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RxStatus)); 1037 while (!((rx_status = inw(ioaddr + RxStatus)) & 0x8000) && 1038 (--worklimit >= 0)) { 1039 if (rx_status & 0x4000) { /* Error, update stats. */ 1040 short error = rx_status & 0x3800; 1041 lp->stats.rx_errors++; 1042 switch (error) { 1043 case 0x0000: lp->stats.rx_over_errors++; break; 1044 case 0x0800: lp->stats.rx_length_errors++; break; 1045 case 0x1000: lp->stats.rx_frame_errors++; break; 1046 case 0x1800: lp->stats.rx_length_errors++; break; 1047 case 0x2000: lp->stats.rx_frame_errors++; break; 1048 case 0x2800: lp->stats.rx_crc_errors++; break; 1049 } 1050 } else { 1051 short pkt_len = rx_status & 0x7ff; 1052 struct sk_buff *skb; 1053 1054 skb = dev_alloc_skb(pkt_len+5); 1055 1056 DEBUG(3, " Receiving packet size %d status %4.4x.\n", 1057 pkt_len, rx_status); 1058 if (skb != NULL) { 1059 skb_reserve(skb, 2); 1060 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len), 1061 ((pkt_len+3)>>2)); 1062 skb->protocol = eth_type_trans(skb, dev); 1063 netif_rx(skb); 1064 dev->last_rx = jiffies; 1065 lp->stats.rx_packets++; 1066 lp->stats.rx_bytes += pkt_len; 1067 } else { 1068 DEBUG(1, "%s: couldn't allocate a sk_buff of" 1069 " size %d.\n", dev->name, pkt_len); 1070 lp->stats.rx_dropped++; 1071 } 1072 } 1073 tc574_wait_for_completion(dev, RxDiscard); 1074 } 1075 1076 return worklimit; 1077} 1078 1079static void netdev_get_drvinfo(struct net_device *dev, 1080 struct ethtool_drvinfo *info) 1081{ 1082 strcpy(info->driver, "3c574_cs"); 1083} 1084 1085static const struct ethtool_ops netdev_ethtool_ops = { 1086 .get_drvinfo = netdev_get_drvinfo, 1087}; 1088 1089/* Provide ioctl() calls to examine the MII xcvr state. */ 1090static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) 1091{ 1092 struct el3_private *lp = netdev_priv(dev); 1093 kio_addr_t ioaddr = dev->base_addr; 1094 u16 *data = (u16 *)&rq->ifr_ifru; 1095 int phy = lp->phys & 0x1f; 1096 1097 DEBUG(2, "%s: In ioct(%-.6s, %#4.4x) %4.4x %4.4x %4.4x %4.4x.\n", 1098 dev->name, rq->ifr_ifrn.ifrn_name, cmd, 1099 data[0], data[1], data[2], data[3]); 1100 1101 switch(cmd) { 1102 case SIOCGMIIPHY: /* Get the address of the PHY in use. */ 1103 data[0] = phy; 1104 case SIOCGMIIREG: /* Read the specified MII register. */ 1105 { 1106 int saved_window; 1107 unsigned long flags; 1108 1109 spin_lock_irqsave(&lp->window_lock, flags); 1110 saved_window = inw(ioaddr + EL3_CMD) >> 13; 1111 EL3WINDOW(4); 1112 data[3] = mdio_read(ioaddr, data[0] & 0x1f, data[1] & 0x1f); 1113 EL3WINDOW(saved_window); 1114 spin_unlock_irqrestore(&lp->window_lock, flags); 1115 return 0; 1116 } 1117 case SIOCSMIIREG: /* Write the specified MII register */ 1118 { 1119 int saved_window; 1120 unsigned long flags; 1121 1122 if (!capable(CAP_NET_ADMIN)) 1123 return -EPERM; 1124 spin_lock_irqsave(&lp->window_lock, flags); 1125 saved_window = inw(ioaddr + EL3_CMD) >> 13; 1126 EL3WINDOW(4); 1127 mdio_write(ioaddr, data[0] & 0x1f, data[1] & 0x1f, data[2]); 1128 EL3WINDOW(saved_window); 1129 spin_unlock_irqrestore(&lp->window_lock, flags); 1130 return 0; 1131 } 1132 default: 1133 return -EOPNOTSUPP; 1134 } 1135} 1136 1137/* The Odie chip has a 64 bin multicast filter, but the bit layout is not 1138 documented. Until it is we revert to receiving all multicast frames when 1139 any multicast reception is desired. 1140 Note: My other drivers emit a log message whenever promiscuous mode is 1141 entered to help detect password sniffers. This is less desirable on 1142 typical PC card machines, so we omit the message. 1143 */ 1144 1145static void set_rx_mode(struct net_device *dev) 1146{ 1147 kio_addr_t ioaddr = dev->base_addr; 1148 1149 if (dev->flags & IFF_PROMISC) 1150 outw(SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm, 1151 ioaddr + EL3_CMD); 1152 else if (dev->mc_count || (dev->flags & IFF_ALLMULTI)) 1153 outw(SetRxFilter|RxStation|RxMulticast|RxBroadcast, ioaddr + EL3_CMD); 1154 else 1155 outw(SetRxFilter | RxStation | RxBroadcast, ioaddr + EL3_CMD); 1156} 1157 1158static int el3_close(struct net_device *dev) 1159{ 1160 kio_addr_t ioaddr = dev->base_addr; 1161 struct el3_private *lp = netdev_priv(dev); 1162 struct pcmcia_device *link = lp->p_dev; 1163 1164 DEBUG(2, "%s: shutting down ethercard.\n", dev->name); 1165 1166 if (pcmcia_dev_present(link)) { 1167 unsigned long flags; 1168 1169 /* Turn off statistics ASAP. We update lp->stats below. */ 1170 outw(StatsDisable, ioaddr + EL3_CMD); 1171 1172 /* Disable the receiver and transmitter. */ 1173 outw(RxDisable, ioaddr + EL3_CMD); 1174 outw(TxDisable, ioaddr + EL3_CMD); 1175 1176 /* Note: Switching to window 0 may disable the IRQ. */ 1177 EL3WINDOW(0); 1178 spin_lock_irqsave(&lp->window_lock, flags); 1179 update_stats(dev); 1180 spin_unlock_irqrestore(&lp->window_lock, flags); 1181 1182 /* force interrupts off */ 1183 outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD); 1184 } 1185 1186 link->open--; 1187 netif_stop_queue(dev); 1188 del_timer_sync(&lp->media); 1189 1190 return 0; 1191} 1192 1193static struct pcmcia_device_id tc574_ids[] = { 1194 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0574), 1195 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0556, "3CCFEM556.cis"), 1196 PCMCIA_DEVICE_NULL, 1197}; 1198MODULE_DEVICE_TABLE(pcmcia, tc574_ids); 1199 1200static struct pcmcia_driver tc574_driver = { 1201 .owner = THIS_MODULE, 1202 .drv = { 1203 .name = "3c574_cs", 1204 }, 1205 .probe = tc574_probe, 1206 .remove = tc574_detach, 1207 .id_table = tc574_ids, 1208 .suspend = tc574_suspend, 1209 .resume = tc574_resume, 1210}; 1211 1212static int __init init_tc574(void) 1213{ 1214 return pcmcia_register_driver(&tc574_driver); 1215} 1216 1217static void __exit exit_tc574(void) 1218{ 1219 pcmcia_unregister_driver(&tc574_driver); 1220} 1221 1222module_init(init_tc574); 1223module_exit(exit_tc574); 1224