| 1 | /* ====================================================================== |
| 2 | * |
| 3 | * A PCMCIA ethernet driver for the 3com 3c589 card. |
| 4 | * |
| 5 | * Copyright (C) 1999 David A. Hinds -- dahinds@users.sourceforge.net |
| 6 | * |
| 7 | * 3c589_cs.c 1.162 2001/10/13 00:08:50 |
| 8 | * |
| 9 | * The network driver code is based on Donald Becker's 3c589 code: |
| 10 | * |
| 11 | * Written 1994 by Donald Becker. |
| 12 | * Copyright 1993 United States Government as represented by the |
| 13 | * Director, National Security Agency. This software may be used and |
| 14 | * distributed according to the terms of the GNU General Public License, |
| 15 | * incorporated herein by reference. |
| 16 | * Donald Becker may be reached at becker@scyld.com |
| 17 | * |
| 18 | * Updated for 2.5.x by Alan Cox <alan@lxorguk.ukuu.org.uk> |
| 19 | * |
| 20 | * ====================================================================== |
| 21 | */ |
| 22 | |
| 23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 24 | |
| 25 | #define DRV_NAME "3c589_cs" |
| 26 | #define DRV_VERSION "1.162-ac" |
| 27 | |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/ptrace.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/in.h> |
| 36 | #include <linux/delay.h> |
| 37 | #include <linux/ethtool.h> |
| 38 | #include <linux/netdevice.h> |
| 39 | #include <linux/etherdevice.h> |
| 40 | #include <linux/skbuff.h> |
| 41 | #include <linux/if_arp.h> |
| 42 | #include <linux/ioport.h> |
| 43 | #include <linux/bitops.h> |
| 44 | #include <linux/jiffies.h> |
| 45 | #include <linux/uaccess.h> |
| 46 | #include <linux/io.h> |
| 47 | |
| 48 | #include <pcmcia/cistpl.h> |
| 49 | #include <pcmcia/cisreg.h> |
| 50 | #include <pcmcia/ciscode.h> |
| 51 | #include <pcmcia/ds.h> |
| 52 | |
| 53 | |
| 54 | /* To minimize the size of the driver source I only define operating |
| 55 | * constants if they are used several times. You'll need the manual |
| 56 | * if you want to understand driver details. |
| 57 | */ |
| 58 | |
| 59 | /* Offsets from base I/O address. */ |
| 60 | #define EL3_DATA 0x00 |
| 61 | #define EL3_TIMER 0x0a |
| 62 | #define EL3_CMD 0x0e |
| 63 | #define EL3_STATUS 0x0e |
| 64 | |
| 65 | #define EEPROM_READ 0x0080 |
| 66 | #define EEPROM_BUSY 0x8000 |
| 67 | |
| 68 | #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD) |
| 69 | |
| 70 | /* The top five bits written to EL3_CMD are a command, the lower |
| 71 | * 11 bits are the parameter, if applicable. |
| 72 | */ |
| 73 | |
| 74 | enum c509cmd { |
| 75 | TotalReset = 0<<11, |
| 76 | SelectWindow = 1<<11, |
| 77 | StartCoax = 2<<11, |
| 78 | RxDisable = 3<<11, |
| 79 | RxEnable = 4<<11, |
| 80 | RxReset = 5<<11, |
| 81 | RxDiscard = 8<<11, |
| 82 | TxEnable = 9<<11, |
| 83 | TxDisable = 10<<11, |
| 84 | TxReset = 11<<11, |
| 85 | FakeIntr = 12<<11, |
| 86 | AckIntr = 13<<11, |
| 87 | SetIntrEnb = 14<<11, |
| 88 | SetStatusEnb = 15<<11, |
| 89 | SetRxFilter = 16<<11, |
| 90 | SetRxThreshold = 17<<11, |
| 91 | SetTxThreshold = 18<<11, |
| 92 | SetTxStart = 19<<11, |
| 93 | StatsEnable = 21<<11, |
| 94 | StatsDisable = 22<<11, |
| 95 | StopCoax = 23<<11 |
| 96 | }; |
| 97 | |
| 98 | enum c509status { |
| 99 | IntLatch = 0x0001, |
| 100 | AdapterFailure = 0x0002, |
| 101 | TxComplete = 0x0004, |
| 102 | TxAvailable = 0x0008, |
| 103 | RxComplete = 0x0010, |
| 104 | RxEarly = 0x0020, |
| 105 | IntReq = 0x0040, |
| 106 | StatsFull = 0x0080, |
| 107 | CmdBusy = 0x1000 |
| 108 | }; |
| 109 | |
| 110 | /* The SetRxFilter command accepts the following classes: */ |
| 111 | enum RxFilter { |
| 112 | RxStation = 1, |
| 113 | RxMulticast = 2, |
| 114 | RxBroadcast = 4, |
| 115 | RxProm = 8 |
| 116 | }; |
| 117 | |
| 118 | /* Register window 1 offsets, the window used in normal operation. */ |
| 119 | #define TX_FIFO 0x00 |
| 120 | #define RX_FIFO 0x00 |
| 121 | #define RX_STATUS 0x08 |
| 122 | #define TX_STATUS 0x0B |
| 123 | #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */ |
| 124 | |
| 125 | #define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */ |
| 126 | #define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */ |
| 127 | #define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */ |
| 128 | #define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */ |
| 129 | |
| 130 | /* Time in jiffies before concluding Tx hung */ |
| 131 | #define TX_TIMEOUT ((400*HZ)/1000) |
| 132 | |
| 133 | struct el3_private { |
| 134 | struct pcmcia_device *p_dev; |
| 135 | /* For transceiver monitoring */ |
| 136 | struct timer_list media; |
| 137 | u16 media_status; |
| 138 | u16 fast_poll; |
| 139 | unsigned long last_irq; |
| 140 | spinlock_t lock; |
| 141 | }; |
| 142 | |
| 143 | static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" }; |
| 144 | |
| 145 | /*====================================================================*/ |
| 146 | |
| 147 | /* Module parameters */ |
| 148 | |
| 149 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); |
| 150 | MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver"); |
| 151 | MODULE_LICENSE("GPL"); |
| 152 | |
| 153 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) |
| 154 | |
| 155 | /* Special hook for setting if_port when module is loaded */ |
| 156 | INT_MODULE_PARM(if_port, 0); |
| 157 | |
| 158 | |
| 159 | /*====================================================================*/ |
| 160 | |
| 161 | static int tc589_config(struct pcmcia_device *link); |
| 162 | static void tc589_release(struct pcmcia_device *link); |
| 163 | |
| 164 | static u16 read_eeprom(unsigned int ioaddr, int index); |
| 165 | static void tc589_reset(struct net_device *dev); |
| 166 | static void media_check(unsigned long arg); |
| 167 | static int el3_config(struct net_device *dev, struct ifmap *map); |
| 168 | static int el3_open(struct net_device *dev); |
| 169 | static netdev_tx_t el3_start_xmit(struct sk_buff *skb, |
| 170 | struct net_device *dev); |
| 171 | static irqreturn_t el3_interrupt(int irq, void *dev_id); |
| 172 | static void update_stats(struct net_device *dev); |
| 173 | static struct net_device_stats *el3_get_stats(struct net_device *dev); |
| 174 | static int el3_rx(struct net_device *dev); |
| 175 | static int el3_close(struct net_device *dev); |
| 176 | static void el3_tx_timeout(struct net_device *dev); |
| 177 | static void set_rx_mode(struct net_device *dev); |
| 178 | static void set_multicast_list(struct net_device *dev); |
| 179 | static const struct ethtool_ops netdev_ethtool_ops; |
| 180 | |
| 181 | static void tc589_detach(struct pcmcia_device *p_dev); |
| 182 | |
| 183 | static const struct net_device_ops el3_netdev_ops = { |
| 184 | .ndo_open = el3_open, |
| 185 | .ndo_stop = el3_close, |
| 186 | .ndo_start_xmit = el3_start_xmit, |
| 187 | .ndo_tx_timeout = el3_tx_timeout, |
| 188 | .ndo_set_config = el3_config, |
| 189 | .ndo_get_stats = el3_get_stats, |
| 190 | .ndo_set_rx_mode = set_multicast_list, |
| 191 | .ndo_change_mtu = eth_change_mtu, |
| 192 | .ndo_set_mac_address = eth_mac_addr, |
| 193 | .ndo_validate_addr = eth_validate_addr, |
| 194 | }; |
| 195 | |
| 196 | static int tc589_probe(struct pcmcia_device *link) |
| 197 | { |
| 198 | struct el3_private *lp; |
| 199 | struct net_device *dev; |
| 200 | |
| 201 | dev_dbg(&link->dev, "3c589_attach()\n"); |
| 202 | |
| 203 | /* Create new ethernet device */ |
| 204 | dev = alloc_etherdev(sizeof(struct el3_private)); |
| 205 | if (!dev) |
| 206 | return -ENOMEM; |
| 207 | lp = netdev_priv(dev); |
| 208 | link->priv = dev; |
| 209 | lp->p_dev = link; |
| 210 | |
| 211 | spin_lock_init(&lp->lock); |
| 212 | link->resource[0]->end = 16; |
| 213 | link->resource[0]->flags |= IO_DATA_PATH_WIDTH_16; |
| 214 | |
| 215 | link->config_flags |= CONF_ENABLE_IRQ; |
| 216 | link->config_index = 1; |
| 217 | |
| 218 | dev->netdev_ops = &el3_netdev_ops; |
| 219 | dev->watchdog_timeo = TX_TIMEOUT; |
| 220 | |
| 221 | dev->ethtool_ops = &netdev_ethtool_ops; |
| 222 | |
| 223 | return tc589_config(link); |
| 224 | } |
| 225 | |
| 226 | static void tc589_detach(struct pcmcia_device *link) |
| 227 | { |
| 228 | struct net_device *dev = link->priv; |
| 229 | |
| 230 | dev_dbg(&link->dev, "3c589_detach\n"); |
| 231 | |
| 232 | unregister_netdev(dev); |
| 233 | |
| 234 | tc589_release(link); |
| 235 | |
| 236 | free_netdev(dev); |
| 237 | } /* tc589_detach */ |
| 238 | |
| 239 | static int tc589_config(struct pcmcia_device *link) |
| 240 | { |
| 241 | struct net_device *dev = link->priv; |
| 242 | __be16 *phys_addr; |
| 243 | int ret, i, j, multi = 0, fifo; |
| 244 | unsigned int ioaddr; |
| 245 | static const char * const ram_split[] = {"5:3", "3:1", "1:1", "3:5"}; |
| 246 | u8 *buf; |
| 247 | size_t len; |
| 248 | |
| 249 | dev_dbg(&link->dev, "3c589_config\n"); |
| 250 | |
| 251 | phys_addr = (__be16 *)dev->dev_addr; |
| 252 | /* Is this a 3c562? */ |
| 253 | if (link->manf_id != MANFID_3COM) |
| 254 | dev_info(&link->dev, "hmmm, is this really a 3Com card??\n"); |
| 255 | multi = (link->card_id == PRODID_3COM_3C562); |
| 256 | |
| 257 | link->io_lines = 16; |
| 258 | |
| 259 | /* For the 3c562, the base address must be xx00-xx7f */ |
| 260 | for (i = j = 0; j < 0x400; j += 0x10) { |
| 261 | if (multi && (j & 0x80)) |
| 262 | continue; |
| 263 | link->resource[0]->start = j ^ 0x300; |
| 264 | i = pcmcia_request_io(link); |
| 265 | if (i == 0) |
| 266 | break; |
| 267 | } |
| 268 | if (i != 0) |
| 269 | goto failed; |
| 270 | |
| 271 | ret = pcmcia_request_irq(link, el3_interrupt); |
| 272 | if (ret) |
| 273 | goto failed; |
| 274 | |
| 275 | ret = pcmcia_enable_device(link); |
| 276 | if (ret) |
| 277 | goto failed; |
| 278 | |
| 279 | dev->irq = link->irq; |
| 280 | dev->base_addr = link->resource[0]->start; |
| 281 | ioaddr = dev->base_addr; |
| 282 | EL3WINDOW(0); |
| 283 | |
| 284 | /* The 3c589 has an extra EEPROM for configuration info, including |
| 285 | * the hardware address. The 3c562 puts the address in the CIS. |
| 286 | */ |
| 287 | len = pcmcia_get_tuple(link, 0x88, &buf); |
| 288 | if (buf && len >= 6) { |
| 289 | for (i = 0; i < 3; i++) |
| 290 | phys_addr[i] = htons(le16_to_cpu(buf[i*2])); |
| 291 | kfree(buf); |
| 292 | } else { |
| 293 | kfree(buf); /* 0 < len < 6 */ |
| 294 | for (i = 0; i < 3; i++) |
| 295 | phys_addr[i] = htons(read_eeprom(ioaddr, i)); |
| 296 | if (phys_addr[0] == htons(0x6060)) { |
| 297 | dev_err(&link->dev, "IO port conflict at 0x%03lx-0x%03lx\n", |
| 298 | dev->base_addr, dev->base_addr+15); |
| 299 | goto failed; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | /* The address and resource configuration register aren't loaded from |
| 304 | * the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. |
| 305 | */ |
| 306 | |
| 307 | outw(0x3f00, ioaddr + 8); |
| 308 | fifo = inl(ioaddr); |
| 309 | |
| 310 | /* The if_port symbol can be set when the module is loaded */ |
| 311 | if ((if_port >= 0) && (if_port <= 3)) |
| 312 | dev->if_port = if_port; |
| 313 | else |
| 314 | dev_err(&link->dev, "invalid if_port requested\n"); |
| 315 | |
| 316 | SET_NETDEV_DEV(dev, &link->dev); |
| 317 | |
| 318 | if (register_netdev(dev) != 0) { |
| 319 | dev_err(&link->dev, "register_netdev() failed\n"); |
| 320 | goto failed; |
| 321 | } |
| 322 | |
| 323 | netdev_info(dev, "3Com 3c%s, io %#3lx, irq %d, hw_addr %pM\n", |
| 324 | (multi ? "562" : "589"), dev->base_addr, dev->irq, |
| 325 | dev->dev_addr); |
| 326 | netdev_info(dev, " %dK FIFO split %s Rx:Tx, %s xcvr\n", |
| 327 | (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3], |
| 328 | if_names[dev->if_port]); |
| 329 | return 0; |
| 330 | |
| 331 | failed: |
| 332 | tc589_release(link); |
| 333 | return -ENODEV; |
| 334 | } /* tc589_config */ |
| 335 | |
| 336 | static void tc589_release(struct pcmcia_device *link) |
| 337 | { |
| 338 | pcmcia_disable_device(link); |
| 339 | } |
| 340 | |
| 341 | static int tc589_suspend(struct pcmcia_device *link) |
| 342 | { |
| 343 | struct net_device *dev = link->priv; |
| 344 | |
| 345 | if (link->open) |
| 346 | netif_device_detach(dev); |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | static int tc589_resume(struct pcmcia_device *link) |
| 352 | { |
| 353 | struct net_device *dev = link->priv; |
| 354 | |
| 355 | if (link->open) { |
| 356 | tc589_reset(dev); |
| 357 | netif_device_attach(dev); |
| 358 | } |
| 359 | |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | /*====================================================================*/ |
| 364 | |
| 365 | /* Use this for commands that may take time to finish */ |
| 366 | |
| 367 | static void tc589_wait_for_completion(struct net_device *dev, int cmd) |
| 368 | { |
| 369 | int i = 100; |
| 370 | outw(cmd, dev->base_addr + EL3_CMD); |
| 371 | while (--i > 0) |
| 372 | if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) |
| 373 | break; |
| 374 | if (i == 0) |
| 375 | netdev_warn(dev, "command 0x%04x did not complete!\n", cmd); |
| 376 | } |
| 377 | |
| 378 | /* Read a word from the EEPROM using the regular EEPROM access register. |
| 379 | * Assume that we are in register window zero. |
| 380 | */ |
| 381 | |
| 382 | static u16 read_eeprom(unsigned int ioaddr, int index) |
| 383 | { |
| 384 | int i; |
| 385 | outw(EEPROM_READ + index, ioaddr + 10); |
| 386 | /* Reading the eeprom takes 162 us */ |
| 387 | for (i = 1620; i >= 0; i--) |
| 388 | if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0) |
| 389 | break; |
| 390 | return inw(ioaddr + 12); |
| 391 | } |
| 392 | |
| 393 | /* Set transceiver type, perhaps to something other than what the user |
| 394 | * specified in dev->if_port. |
| 395 | */ |
| 396 | |
| 397 | static void tc589_set_xcvr(struct net_device *dev, int if_port) |
| 398 | { |
| 399 | struct el3_private *lp = netdev_priv(dev); |
| 400 | unsigned int ioaddr = dev->base_addr; |
| 401 | |
| 402 | EL3WINDOW(0); |
| 403 | switch (if_port) { |
| 404 | case 0: |
| 405 | case 1: |
| 406 | outw(0, ioaddr + 6); |
| 407 | break; |
| 408 | case 2: |
| 409 | outw(3<<14, ioaddr + 6); |
| 410 | break; |
| 411 | case 3: |
| 412 | outw(1<<14, ioaddr + 6); |
| 413 | break; |
| 414 | } |
| 415 | /* On PCMCIA, this just turns on the LED */ |
| 416 | outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD); |
| 417 | /* 10baseT interface, enable link beat and jabber check. */ |
| 418 | EL3WINDOW(4); |
| 419 | outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA); |
| 420 | EL3WINDOW(1); |
| 421 | if (if_port == 2) |
| 422 | lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000); |
| 423 | else |
| 424 | lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800); |
| 425 | } |
| 426 | |
| 427 | static void dump_status(struct net_device *dev) |
| 428 | { |
| 429 | unsigned int ioaddr = dev->base_addr; |
| 430 | EL3WINDOW(1); |
| 431 | netdev_info(dev, " irq status %04x, rx status %04x, tx status %02x tx free %04x\n", |
| 432 | inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS), |
| 433 | inb(ioaddr+TX_STATUS), inw(ioaddr+TX_FREE)); |
| 434 | EL3WINDOW(4); |
| 435 | netdev_info(dev, " diagnostics: fifo %04x net %04x ethernet %04x media %04x\n", |
| 436 | inw(ioaddr+0x04), inw(ioaddr+0x06), inw(ioaddr+0x08), |
| 437 | inw(ioaddr+0x0a)); |
| 438 | EL3WINDOW(1); |
| 439 | } |
| 440 | |
| 441 | /* Reset and restore all of the 3c589 registers. */ |
| 442 | static void tc589_reset(struct net_device *dev) |
| 443 | { |
| 444 | unsigned int ioaddr = dev->base_addr; |
| 445 | int i; |
| 446 | |
| 447 | EL3WINDOW(0); |
| 448 | outw(0x0001, ioaddr + 4); /* Activate board. */ |
| 449 | outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */ |
| 450 | |
| 451 | /* Set the station address in window 2. */ |
| 452 | EL3WINDOW(2); |
| 453 | for (i = 0; i < 6; i++) |
| 454 | outb(dev->dev_addr[i], ioaddr + i); |
| 455 | |
| 456 | tc589_set_xcvr(dev, dev->if_port); |
| 457 | |
| 458 | /* Switch to the stats window, and clear all stats by reading. */ |
| 459 | outw(StatsDisable, ioaddr + EL3_CMD); |
| 460 | EL3WINDOW(6); |
| 461 | for (i = 0; i < 9; i++) |
| 462 | inb(ioaddr+i); |
| 463 | inw(ioaddr + 10); |
| 464 | inw(ioaddr + 12); |
| 465 | |
| 466 | /* Switch to register set 1 for normal use. */ |
| 467 | EL3WINDOW(1); |
| 468 | |
| 469 | set_rx_mode(dev); |
| 470 | outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */ |
| 471 | outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */ |
| 472 | outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */ |
| 473 | /* Allow status bits to be seen. */ |
| 474 | outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD); |
| 475 | /* Ack all pending events, and set active indicator mask. */ |
| 476 | outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq, |
| 477 | ioaddr + EL3_CMD); |
| 478 | outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull |
| 479 | | AdapterFailure, ioaddr + EL3_CMD); |
| 480 | } |
| 481 | |
| 482 | static void netdev_get_drvinfo(struct net_device *dev, |
| 483 | struct ethtool_drvinfo *info) |
| 484 | { |
| 485 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
| 486 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); |
| 487 | snprintf(info->bus_info, sizeof(info->bus_info), |
| 488 | "PCMCIA 0x%lx", dev->base_addr); |
| 489 | } |
| 490 | |
| 491 | static const struct ethtool_ops netdev_ethtool_ops = { |
| 492 | .get_drvinfo = netdev_get_drvinfo, |
| 493 | }; |
| 494 | |
| 495 | static int el3_config(struct net_device *dev, struct ifmap *map) |
| 496 | { |
| 497 | if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) { |
| 498 | if (map->port <= 3) { |
| 499 | dev->if_port = map->port; |
| 500 | netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]); |
| 501 | tc589_set_xcvr(dev, dev->if_port); |
| 502 | } else { |
| 503 | return -EINVAL; |
| 504 | } |
| 505 | } |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static int el3_open(struct net_device *dev) |
| 510 | { |
| 511 | struct el3_private *lp = netdev_priv(dev); |
| 512 | struct pcmcia_device *link = lp->p_dev; |
| 513 | |
| 514 | if (!pcmcia_dev_present(link)) |
| 515 | return -ENODEV; |
| 516 | |
| 517 | link->open++; |
| 518 | netif_start_queue(dev); |
| 519 | |
| 520 | tc589_reset(dev); |
| 521 | setup_timer(&lp->media, media_check, (unsigned long)dev); |
| 522 | mod_timer(&lp->media, jiffies + HZ); |
| 523 | |
| 524 | dev_dbg(&link->dev, "%s: opened, status %4.4x.\n", |
| 525 | dev->name, inw(dev->base_addr + EL3_STATUS)); |
| 526 | |
| 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static void el3_tx_timeout(struct net_device *dev) |
| 531 | { |
| 532 | unsigned int ioaddr = dev->base_addr; |
| 533 | |
| 534 | netdev_warn(dev, "Transmit timed out!\n"); |
| 535 | dump_status(dev); |
| 536 | dev->stats.tx_errors++; |
| 537 | netif_trans_update(dev); /* prevent tx timeout */ |
| 538 | /* Issue TX_RESET and TX_START commands. */ |
| 539 | tc589_wait_for_completion(dev, TxReset); |
| 540 | outw(TxEnable, ioaddr + EL3_CMD); |
| 541 | netif_wake_queue(dev); |
| 542 | } |
| 543 | |
| 544 | static void pop_tx_status(struct net_device *dev) |
| 545 | { |
| 546 | unsigned int ioaddr = dev->base_addr; |
| 547 | int i; |
| 548 | |
| 549 | /* Clear the Tx status stack. */ |
| 550 | for (i = 32; i > 0; i--) { |
| 551 | u_char tx_status = inb(ioaddr + TX_STATUS); |
| 552 | if (!(tx_status & 0x84)) |
| 553 | break; |
| 554 | /* reset transmitter on jabber error or underrun */ |
| 555 | if (tx_status & 0x30) |
| 556 | tc589_wait_for_completion(dev, TxReset); |
| 557 | if (tx_status & 0x38) { |
| 558 | netdev_dbg(dev, "transmit error: status 0x%02x\n", tx_status); |
| 559 | outw(TxEnable, ioaddr + EL3_CMD); |
| 560 | dev->stats.tx_aborted_errors++; |
| 561 | } |
| 562 | outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */ |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | static netdev_tx_t el3_start_xmit(struct sk_buff *skb, |
| 567 | struct net_device *dev) |
| 568 | { |
| 569 | unsigned int ioaddr = dev->base_addr; |
| 570 | struct el3_private *priv = netdev_priv(dev); |
| 571 | unsigned long flags; |
| 572 | |
| 573 | netdev_dbg(dev, "el3_start_xmit(length = %ld) called, status %4.4x.\n", |
| 574 | (long)skb->len, inw(ioaddr + EL3_STATUS)); |
| 575 | |
| 576 | spin_lock_irqsave(&priv->lock, flags); |
| 577 | |
| 578 | dev->stats.tx_bytes += skb->len; |
| 579 | |
| 580 | /* Put out the doubleword header... */ |
| 581 | outw(skb->len, ioaddr + TX_FIFO); |
| 582 | outw(0x00, ioaddr + TX_FIFO); |
| 583 | /* ... and the packet rounded to a doubleword. */ |
| 584 | outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2); |
| 585 | |
| 586 | if (inw(ioaddr + TX_FREE) <= 1536) { |
| 587 | netif_stop_queue(dev); |
| 588 | /* Interrupt us when the FIFO has room for max-sized packet. */ |
| 589 | outw(SetTxThreshold + 1536, ioaddr + EL3_CMD); |
| 590 | } |
| 591 | |
| 592 | pop_tx_status(dev); |
| 593 | spin_unlock_irqrestore(&priv->lock, flags); |
| 594 | dev_kfree_skb(skb); |
| 595 | |
| 596 | return NETDEV_TX_OK; |
| 597 | } |
| 598 | |
| 599 | /* The EL3 interrupt handler. */ |
| 600 | static irqreturn_t el3_interrupt(int irq, void *dev_id) |
| 601 | { |
| 602 | struct net_device *dev = (struct net_device *) dev_id; |
| 603 | struct el3_private *lp = netdev_priv(dev); |
| 604 | unsigned int ioaddr; |
| 605 | __u16 status; |
| 606 | int i = 0, handled = 1; |
| 607 | |
| 608 | if (!netif_device_present(dev)) |
| 609 | return IRQ_NONE; |
| 610 | |
| 611 | ioaddr = dev->base_addr; |
| 612 | |
| 613 | netdev_dbg(dev, "interrupt, status %4.4x.\n", inw(ioaddr + EL3_STATUS)); |
| 614 | |
| 615 | spin_lock(&lp->lock); |
| 616 | while ((status = inw(ioaddr + EL3_STATUS)) & |
| 617 | (IntLatch | RxComplete | StatsFull)) { |
| 618 | if ((status & 0xe000) != 0x2000) { |
| 619 | netdev_dbg(dev, "interrupt from dead card\n"); |
| 620 | handled = 0; |
| 621 | break; |
| 622 | } |
| 623 | if (status & RxComplete) |
| 624 | el3_rx(dev); |
| 625 | if (status & TxAvailable) { |
| 626 | netdev_dbg(dev, " TX room bit was handled.\n"); |
| 627 | /* There's room in the FIFO for a full-sized packet. */ |
| 628 | outw(AckIntr | TxAvailable, ioaddr + EL3_CMD); |
| 629 | netif_wake_queue(dev); |
| 630 | } |
| 631 | if (status & TxComplete) |
| 632 | pop_tx_status(dev); |
| 633 | if (status & (AdapterFailure | RxEarly | StatsFull)) { |
| 634 | /* Handle all uncommon interrupts. */ |
| 635 | if (status & StatsFull) /* Empty statistics. */ |
| 636 | update_stats(dev); |
| 637 | if (status & RxEarly) { |
| 638 | /* Rx early is unused. */ |
| 639 | el3_rx(dev); |
| 640 | outw(AckIntr | RxEarly, ioaddr + EL3_CMD); |
| 641 | } |
| 642 | if (status & AdapterFailure) { |
| 643 | u16 fifo_diag; |
| 644 | EL3WINDOW(4); |
| 645 | fifo_diag = inw(ioaddr + 4); |
| 646 | EL3WINDOW(1); |
| 647 | netdev_warn(dev, "adapter failure, FIFO diagnostic register %04x.\n", |
| 648 | fifo_diag); |
| 649 | if (fifo_diag & 0x0400) { |
| 650 | /* Tx overrun */ |
| 651 | tc589_wait_for_completion(dev, TxReset); |
| 652 | outw(TxEnable, ioaddr + EL3_CMD); |
| 653 | } |
| 654 | if (fifo_diag & 0x2000) { |
| 655 | /* Rx underrun */ |
| 656 | tc589_wait_for_completion(dev, RxReset); |
| 657 | set_rx_mode(dev); |
| 658 | outw(RxEnable, ioaddr + EL3_CMD); |
| 659 | } |
| 660 | outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD); |
| 661 | } |
| 662 | } |
| 663 | if (++i > 10) { |
| 664 | netdev_err(dev, "infinite loop in interrupt, status %4.4x.\n", |
| 665 | status); |
| 666 | /* Clear all interrupts */ |
| 667 | outw(AckIntr | 0xFF, ioaddr + EL3_CMD); |
| 668 | break; |
| 669 | } |
| 670 | /* Acknowledge the IRQ. */ |
| 671 | outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD); |
| 672 | } |
| 673 | lp->last_irq = jiffies; |
| 674 | spin_unlock(&lp->lock); |
| 675 | netdev_dbg(dev, "exiting interrupt, status %4.4x.\n", |
| 676 | inw(ioaddr + EL3_STATUS)); |
| 677 | return IRQ_RETVAL(handled); |
| 678 | } |
| 679 | |
| 680 | static void media_check(unsigned long arg) |
| 681 | { |
| 682 | struct net_device *dev = (struct net_device *)(arg); |
| 683 | struct el3_private *lp = netdev_priv(dev); |
| 684 | unsigned int ioaddr = dev->base_addr; |
| 685 | u16 media, errs; |
| 686 | unsigned long flags; |
| 687 | |
| 688 | if (!netif_device_present(dev)) |
| 689 | goto reschedule; |
| 690 | |
| 691 | /* Check for pending interrupt with expired latency timer: with |
| 692 | * this, we can limp along even if the interrupt is blocked |
| 693 | */ |
| 694 | if ((inw(ioaddr + EL3_STATUS) & IntLatch) && |
| 695 | (inb(ioaddr + EL3_TIMER) == 0xff)) { |
| 696 | if (!lp->fast_poll) |
| 697 | netdev_warn(dev, "interrupt(s) dropped!\n"); |
| 698 | |
| 699 | local_irq_save(flags); |
| 700 | el3_interrupt(dev->irq, dev); |
| 701 | local_irq_restore(flags); |
| 702 | |
| 703 | lp->fast_poll = HZ; |
| 704 | } |
| 705 | if (lp->fast_poll) { |
| 706 | lp->fast_poll--; |
| 707 | lp->media.expires = jiffies + HZ/100; |
| 708 | add_timer(&lp->media); |
| 709 | return; |
| 710 | } |
| 711 | |
| 712 | /* lp->lock guards the EL3 window. Window should always be 1 except |
| 713 | * when the lock is held |
| 714 | */ |
| 715 | |
| 716 | spin_lock_irqsave(&lp->lock, flags); |
| 717 | EL3WINDOW(4); |
| 718 | media = inw(ioaddr+WN4_MEDIA) & 0xc810; |
| 719 | |
| 720 | /* Ignore collisions unless we've had no irq's recently */ |
| 721 | if (time_before(jiffies, lp->last_irq + HZ)) { |
| 722 | media &= ~0x0010; |
| 723 | } else { |
| 724 | /* Try harder to detect carrier errors */ |
| 725 | EL3WINDOW(6); |
| 726 | outw(StatsDisable, ioaddr + EL3_CMD); |
| 727 | errs = inb(ioaddr + 0); |
| 728 | outw(StatsEnable, ioaddr + EL3_CMD); |
| 729 | dev->stats.tx_carrier_errors += errs; |
| 730 | if (errs || (lp->media_status & 0x0010)) |
| 731 | media |= 0x0010; |
| 732 | } |
| 733 | |
| 734 | if (media != lp->media_status) { |
| 735 | if ((media & lp->media_status & 0x8000) && |
| 736 | ((lp->media_status ^ media) & 0x0800)) |
| 737 | netdev_info(dev, "%s link beat\n", |
| 738 | (lp->media_status & 0x0800 ? "lost" : "found")); |
| 739 | else if ((media & lp->media_status & 0x4000) && |
| 740 | ((lp->media_status ^ media) & 0x0010)) |
| 741 | netdev_info(dev, "coax cable %s\n", |
| 742 | (lp->media_status & 0x0010 ? "ok" : "problem")); |
| 743 | if (dev->if_port == 0) { |
| 744 | if (media & 0x8000) { |
| 745 | if (media & 0x0800) |
| 746 | netdev_info(dev, "flipped to 10baseT\n"); |
| 747 | else |
| 748 | tc589_set_xcvr(dev, 2); |
| 749 | } else if (media & 0x4000) { |
| 750 | if (media & 0x0010) |
| 751 | tc589_set_xcvr(dev, 1); |
| 752 | else |
| 753 | netdev_info(dev, "flipped to 10base2\n"); |
| 754 | } |
| 755 | } |
| 756 | lp->media_status = media; |
| 757 | } |
| 758 | |
| 759 | EL3WINDOW(1); |
| 760 | spin_unlock_irqrestore(&lp->lock, flags); |
| 761 | |
| 762 | reschedule: |
| 763 | lp->media.expires = jiffies + HZ; |
| 764 | add_timer(&lp->media); |
| 765 | } |
| 766 | |
| 767 | static struct net_device_stats *el3_get_stats(struct net_device *dev) |
| 768 | { |
| 769 | struct el3_private *lp = netdev_priv(dev); |
| 770 | unsigned long flags; |
| 771 | struct pcmcia_device *link = lp->p_dev; |
| 772 | |
| 773 | if (pcmcia_dev_present(link)) { |
| 774 | spin_lock_irqsave(&lp->lock, flags); |
| 775 | update_stats(dev); |
| 776 | spin_unlock_irqrestore(&lp->lock, flags); |
| 777 | } |
| 778 | return &dev->stats; |
| 779 | } |
| 780 | |
| 781 | /* Update statistics. We change to register window 6, so this should be run |
| 782 | * single-threaded if the device is active. This is expected to be a rare |
| 783 | * operation, and it's simpler for the rest of the driver to assume that |
| 784 | * window 1 is always valid rather than use a special window-state variable. |
| 785 | * |
| 786 | * Caller must hold the lock for this |
| 787 | */ |
| 788 | |
| 789 | static void update_stats(struct net_device *dev) |
| 790 | { |
| 791 | unsigned int ioaddr = dev->base_addr; |
| 792 | |
| 793 | netdev_dbg(dev, "updating the statistics.\n"); |
| 794 | /* Turn off statistics updates while reading. */ |
| 795 | outw(StatsDisable, ioaddr + EL3_CMD); |
| 796 | /* Switch to the stats window, and read everything. */ |
| 797 | EL3WINDOW(6); |
| 798 | dev->stats.tx_carrier_errors += inb(ioaddr + 0); |
| 799 | dev->stats.tx_heartbeat_errors += inb(ioaddr + 1); |
| 800 | /* Multiple collisions. */ |
| 801 | inb(ioaddr + 2); |
| 802 | dev->stats.collisions += inb(ioaddr + 3); |
| 803 | dev->stats.tx_window_errors += inb(ioaddr + 4); |
| 804 | dev->stats.rx_fifo_errors += inb(ioaddr + 5); |
| 805 | dev->stats.tx_packets += inb(ioaddr + 6); |
| 806 | /* Rx packets */ |
| 807 | inb(ioaddr + 7); |
| 808 | /* Tx deferrals */ |
| 809 | inb(ioaddr + 8); |
| 810 | /* Rx octets */ |
| 811 | inw(ioaddr + 10); |
| 812 | /* Tx octets */ |
| 813 | inw(ioaddr + 12); |
| 814 | |
| 815 | /* Back to window 1, and turn statistics back on. */ |
| 816 | EL3WINDOW(1); |
| 817 | outw(StatsEnable, ioaddr + EL3_CMD); |
| 818 | } |
| 819 | |
| 820 | static int el3_rx(struct net_device *dev) |
| 821 | { |
| 822 | unsigned int ioaddr = dev->base_addr; |
| 823 | int worklimit = 32; |
| 824 | short rx_status; |
| 825 | |
| 826 | netdev_dbg(dev, "in rx_packet(), status %4.4x, rx_status %4.4x.\n", |
| 827 | inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS)); |
| 828 | while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) && |
| 829 | worklimit > 0) { |
| 830 | worklimit--; |
| 831 | if (rx_status & 0x4000) { /* Error, update stats. */ |
| 832 | short error = rx_status & 0x3800; |
| 833 | dev->stats.rx_errors++; |
| 834 | switch (error) { |
| 835 | case 0x0000: |
| 836 | dev->stats.rx_over_errors++; |
| 837 | break; |
| 838 | case 0x0800: |
| 839 | dev->stats.rx_length_errors++; |
| 840 | break; |
| 841 | case 0x1000: |
| 842 | dev->stats.rx_frame_errors++; |
| 843 | break; |
| 844 | case 0x1800: |
| 845 | dev->stats.rx_length_errors++; |
| 846 | break; |
| 847 | case 0x2000: |
| 848 | dev->stats.rx_frame_errors++; |
| 849 | break; |
| 850 | case 0x2800: |
| 851 | dev->stats.rx_crc_errors++; |
| 852 | break; |
| 853 | } |
| 854 | } else { |
| 855 | short pkt_len = rx_status & 0x7ff; |
| 856 | struct sk_buff *skb; |
| 857 | |
| 858 | skb = netdev_alloc_skb(dev, pkt_len + 5); |
| 859 | |
| 860 | netdev_dbg(dev, " Receiving packet size %d status %4.4x.\n", |
| 861 | pkt_len, rx_status); |
| 862 | if (skb != NULL) { |
| 863 | skb_reserve(skb, 2); |
| 864 | insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len), |
| 865 | (pkt_len+3)>>2); |
| 866 | skb->protocol = eth_type_trans(skb, dev); |
| 867 | netif_rx(skb); |
| 868 | dev->stats.rx_packets++; |
| 869 | dev->stats.rx_bytes += pkt_len; |
| 870 | } else { |
| 871 | netdev_dbg(dev, "couldn't allocate a sk_buff of size %d.\n", |
| 872 | pkt_len); |
| 873 | dev->stats.rx_dropped++; |
| 874 | } |
| 875 | } |
| 876 | /* Pop the top of the Rx FIFO */ |
| 877 | tc589_wait_for_completion(dev, RxDiscard); |
| 878 | } |
| 879 | if (worklimit == 0) |
| 880 | netdev_warn(dev, "too much work in el3_rx!\n"); |
| 881 | return 0; |
| 882 | } |
| 883 | |
| 884 | static void set_rx_mode(struct net_device *dev) |
| 885 | { |
| 886 | unsigned int ioaddr = dev->base_addr; |
| 887 | u16 opts = SetRxFilter | RxStation | RxBroadcast; |
| 888 | |
| 889 | if (dev->flags & IFF_PROMISC) |
| 890 | opts |= RxMulticast | RxProm; |
| 891 | else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI)) |
| 892 | opts |= RxMulticast; |
| 893 | outw(opts, ioaddr + EL3_CMD); |
| 894 | } |
| 895 | |
| 896 | static void set_multicast_list(struct net_device *dev) |
| 897 | { |
| 898 | struct el3_private *priv = netdev_priv(dev); |
| 899 | unsigned long flags; |
| 900 | |
| 901 | spin_lock_irqsave(&priv->lock, flags); |
| 902 | set_rx_mode(dev); |
| 903 | spin_unlock_irqrestore(&priv->lock, flags); |
| 904 | } |
| 905 | |
| 906 | static int el3_close(struct net_device *dev) |
| 907 | { |
| 908 | struct el3_private *lp = netdev_priv(dev); |
| 909 | struct pcmcia_device *link = lp->p_dev; |
| 910 | unsigned int ioaddr = dev->base_addr; |
| 911 | |
| 912 | dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name); |
| 913 | |
| 914 | if (pcmcia_dev_present(link)) { |
| 915 | /* Turn off statistics ASAP. We update dev->stats below. */ |
| 916 | outw(StatsDisable, ioaddr + EL3_CMD); |
| 917 | |
| 918 | /* Disable the receiver and transmitter. */ |
| 919 | outw(RxDisable, ioaddr + EL3_CMD); |
| 920 | outw(TxDisable, ioaddr + EL3_CMD); |
| 921 | |
| 922 | if (dev->if_port == 2) |
| 923 | /* Turn off thinnet power. Green! */ |
| 924 | outw(StopCoax, ioaddr + EL3_CMD); |
| 925 | else if (dev->if_port == 1) { |
| 926 | /* Disable link beat and jabber */ |
| 927 | EL3WINDOW(4); |
| 928 | outw(0, ioaddr + WN4_MEDIA); |
| 929 | } |
| 930 | |
| 931 | /* Switching back to window 0 disables the IRQ. */ |
| 932 | EL3WINDOW(0); |
| 933 | /* But we explicitly zero the IRQ line select anyway. */ |
| 934 | outw(0x0f00, ioaddr + WN0_IRQ); |
| 935 | |
| 936 | /* Check if the card still exists */ |
| 937 | if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000) |
| 938 | update_stats(dev); |
| 939 | } |
| 940 | |
| 941 | link->open--; |
| 942 | netif_stop_queue(dev); |
| 943 | del_timer_sync(&lp->media); |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | static const struct pcmcia_device_id tc589_ids[] = { |
| 949 | PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562), |
| 950 | PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77), |
| 951 | PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589), |
| 952 | PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202), |
| 953 | PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"), |
| 954 | PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"), |
| 955 | PCMCIA_DEVICE_NULL, |
| 956 | }; |
| 957 | MODULE_DEVICE_TABLE(pcmcia, tc589_ids); |
| 958 | |
| 959 | static struct pcmcia_driver tc589_driver = { |
| 960 | .owner = THIS_MODULE, |
| 961 | .name = "3c589_cs", |
| 962 | .probe = tc589_probe, |
| 963 | .remove = tc589_detach, |
| 964 | .id_table = tc589_ids, |
| 965 | .suspend = tc589_suspend, |
| 966 | .resume = tc589_resume, |
| 967 | }; |
| 968 | module_pcmcia_driver(tc589_driver); |