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[net-next-2.6.git] / drivers / net / pcmcia / 3c589_cs.c
CommitLineData
1da177e4
LT		 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
113aa838 18 Updated for 2.5.x by Alan Cox <alan@lxorguk.ukuu.org.uk>
1da177e4
LT		 19
20======================================================================*/
21
22#define DRV_NAME "3c589_cs"
23#define DRV_VERSION "1.162-ac"
24
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/ptrace.h>
29#include <linux/slab.h>
30#include <linux/string.h>
31#include <linux/timer.h>
32#include <linux/interrupt.h>
33#include <linux/in.h>
34#include <linux/delay.h>
35#include <linux/ethtool.h>
36#include <linux/netdevice.h>
37#include <linux/etherdevice.h>
38#include <linux/skbuff.h>
39#include <linux/if_arp.h>
40#include <linux/ioport.h>
41#include <linux/bitops.h>
ff5688ae 42#include <linux/jiffies.h>
1da177e4 43
1da177e4
LT		 44#include <pcmcia/cs_types.h>
45#include <pcmcia/cs.h>
46#include <pcmcia/cistpl.h>
47#include <pcmcia/cisreg.h>
48#include <pcmcia/ciscode.h>
49#include <pcmcia/ds.h>
50
51#include <asm/uaccess.h>
52#include <asm/io.h>
53#include <asm/system.h>
54
55/* To minimize the size of the driver source I only define operating
56 constants if they are used several times. You'll need the manual
57 if you want to understand driver details. */
58/* Offsets from base I/O address. */
59#define EL3_DATA 0x00
60#define EL3_TIMER 0x0a
61#define EL3_CMD 0x0e
62#define EL3_STATUS 0x0e
63
64#define EEPROM_READ 0x0080
65#define EEPROM_BUSY 0x8000
66
67#define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
68
69/* The top five bits written to EL3_CMD are a command, the lower
70 11 bits are the parameter, if applicable. */
71enum c509cmd {
72 TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
73 RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
74 TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
75 FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
76 SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
77 SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
78 StatsDisable = 22<<11, StopCoax = 23<<11,
79};
80
81enum c509status {
82 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
83 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
84 IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
85};
86
87/* The SetRxFilter command accepts the following classes: */
88enum RxFilter {
89 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
90};
91
92/* Register window 1 offsets, the window used in normal operation. */
93#define TX_FIFO 0x00
94#define RX_FIFO 0x00
95#define RX_STATUS 0x08
96#define TX_STATUS 0x0B
97#define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
98
99#define WN0_IRQ 0x08 /* Window 0: Set IRQ line in bits 12-15. */
100#define WN4_MEDIA 0x0A /* Window 4: Various transcvr/media bits. */
101#define MEDIA_TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
102#define MEDIA_LED 0x0001 /* Enable link light on 3C589E cards. */
103
104/* Time in jiffies before concluding Tx hung */
105#define TX_TIMEOUT ((400*HZ)/1000)
106
107struct el3_private {
fd238232 108 struct pcmcia_device *p_dev;
1da177e4 109 dev_node_t node;
1da177e4
LT		 110 /* For transceiver monitoring */
111 struct timer_list media;
112 u16 media_status;
113 u16 fast_poll;
114 unsigned long last_irq;
115 spinlock_t lock;
116};
117
21c0f275 118static const char *if_names[] = { "auto", "10baseT", "10base2", "AUI" };
1da177e4
LT		 119
120/*====================================================================*/
121
122/* Module parameters */
123
124MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
125MODULE_DESCRIPTION("3Com 3c589 series PCMCIA ethernet driver");
126MODULE_LICENSE("GPL");
127
128#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
129
130/* Special hook for setting if_port when module is loaded */
131INT_MODULE_PARM(if_port, 0);
132
1da177e4
LT		 133
134/*====================================================================*/
135
15b99ac1 136static int tc589_config(struct pcmcia_device *link);
fba395ee 137static void tc589_release(struct pcmcia_device *link);
1da177e4 138
906da809 139static u16 read_eeprom(unsigned int ioaddr, int index);
1da177e4
LT		 140static void tc589_reset(struct net_device *dev);
141static void media_check(unsigned long arg);
142static int el3_config(struct net_device *dev, struct ifmap *map);
143static int el3_open(struct net_device *dev);
dbf02fae
SH		 144static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
145 struct net_device *dev);
7d12e780 146static irqreturn_t el3_interrupt(int irq, void *dev_id);
1da177e4
LT		 147static void update_stats(struct net_device *dev);
148static struct net_device_stats *el3_get_stats(struct net_device *dev);
149static int el3_rx(struct net_device *dev);
150static int el3_close(struct net_device *dev);
151static void el3_tx_timeout(struct net_device *dev);
e445bb4e 152static void set_rx_mode(struct net_device *dev);
1da177e4 153static void set_multicast_list(struct net_device *dev);
7282d491 154static const struct ethtool_ops netdev_ethtool_ops;
1da177e4 155
cc3b4866 156static void tc589_detach(struct pcmcia_device *p_dev);
1da177e4 157
1da177e4
LT		 158/*======================================================================
159
160 tc589_attach() creates an "instance" of the driver, allocating
161 local data structures for one device. The device is registered
162 with Card Services.
163
164======================================================================*/
165
97161d4b
SH		 166static const struct net_device_ops el3_netdev_ops = {
167 .ndo_open = el3_open,
168 .ndo_stop = el3_close,
169 .ndo_start_xmit = el3_start_xmit,
170 .ndo_tx_timeout = el3_tx_timeout,
171 .ndo_set_config = el3_config,
172 .ndo_get_stats = el3_get_stats,
173 .ndo_set_multicast_list = set_multicast_list,
174 .ndo_change_mtu = eth_change_mtu,
175 .ndo_set_mac_address = eth_mac_addr,
176 .ndo_validate_addr = eth_validate_addr,
177};
178
15b99ac1 179static int tc589_probe(struct pcmcia_device *link)
1da177e4
LT		 180{
181 struct el3_private *lp;
1da177e4 182 struct net_device *dev;
1da177e4 183
dd0fab5b 184 dev_dbg(&link->dev, "3c589_attach()\n");
f8cfa618 185
1da177e4
LT		 186 /* Create new ethernet device */
187 dev = alloc_etherdev(sizeof(struct el3_private));
188 if (!dev)
f8cfa618 189 return -ENOMEM;
1da177e4 190 lp = netdev_priv(dev);
1da177e4 191 link->priv = dev;
fba395ee 192 lp->p_dev = link;
1da177e4
LT		 193
194 spin_lock_init(&lp->lock);
195 link->io.NumPorts1 = 16;
196 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
5fa9167a 197 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
1da177e4 198 link->irq.Handler = &el3_interrupt;
1da177e4 199 link->conf.Attributes = CONF_ENABLE_IRQ;
1da177e4
LT		 200 link->conf.IntType = INT_MEMORY_AND_IO;
201 link->conf.ConfigIndex = 1;
f8cfa618 202
97161d4b 203 dev->netdev_ops = &el3_netdev_ops;
1da177e4 204 dev->watchdog_timeo = TX_TIMEOUT;
97161d4b 205
1da177e4
LT		 206 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
207
15b99ac1 208 return tc589_config(link);
1da177e4
LT		 209} /* tc589_attach */
210
211/*======================================================================
212
213 This deletes a driver "instance". The device is de-registered
214 with Card Services. If it has been released, all local data
215 structures are freed. Otherwise, the structures will be freed
216 when the device is released.
217
218======================================================================*/
219
fba395ee 220static void tc589_detach(struct pcmcia_device *link)
1da177e4
LT		 221{
222 struct net_device *dev = link->priv;
b4635811 223
dd0fab5b 224 dev_dbg(&link->dev, "3c589_detach\n");
1da177e4 225
fd238232 226 if (link->dev_node)
1da177e4
LT		 227 unregister_netdev(dev);
228
e2d40963 229 tc589_release(link);
cc3b4866 230
1da177e4
LT		 231 free_netdev(dev);
232} /* tc589_detach */
233
234/*======================================================================
235
236 tc589_config() is scheduled to run after a CARD_INSERTION event
237 is received, to configure the PCMCIA socket, and to make the
238 ethernet device available to the system.
239
240======================================================================*/
241
15b99ac1 242static int tc589_config(struct pcmcia_device *link)
1da177e4 243{
1da177e4
LT		 244 struct net_device *dev = link->priv;
245 struct el3_private *lp = netdev_priv(dev);
b1e247ad 246 __be16 *phys_addr;
dd0fab5b 247 int ret, i, j, multi = 0, fifo;
906da809 248 unsigned int ioaddr;
1da177e4 249 char *ram_split[] = {"5:3", "3:1", "1:1", "3:5"};
dddfbd82
DB		 250 u8 *buf;
251 size_t len;
1da177e4 252
dd0fab5b 253 dev_dbg(&link->dev, "3c589_config\n");
1da177e4 254
b1e247ad 255 phys_addr = (__be16 *)dev->dev_addr;
efd50585
DB		 256 /* Is this a 3c562? */
257 if (link->manf_id != MANFID_3COM)
1da177e4
LT		 258 printk(KERN_INFO "3c589_cs: hmmm, is this really a "
259 "3Com card??\n");
efd50585 260 multi = (link->card_id == PRODID_3COM_3C562);
1da177e4
LT		 261
262 /* For the 3c562, the base address must be xx00-xx7f */
263 link->io.IOAddrLines = 16;
264 for (i = j = 0; j < 0x400; j += 0x10) {
265 if (multi && (j & 0x80)) continue;
266 link->io.BasePort1 = j ^ 0x300;
fba395ee 267 i = pcmcia_request_io(link, &link->io);
4c89e88b
DB		 268 if (i == 0)
269 break;
1da177e4 270 }
dd0fab5b 271 if (i != 0)
1da177e4 272 goto failed;
dd0fab5b
DB		 273
274 ret = pcmcia_request_irq(link, &link->irq);
275 if (ret)
276 goto failed;
277
278 ret = pcmcia_request_configuration(link, &link->conf);
279 if (ret)
280 goto failed;
1da177e4
LT		 281
282 dev->irq = link->irq.AssignedIRQ;
283 dev->base_addr = link->io.BasePort1;
284 ioaddr = dev->base_addr;
285 EL3WINDOW(0);
286
287 /* The 3c589 has an extra EEPROM for configuration info, including
288 the hardware address. The 3c562 puts the address in the CIS. */
dddfbd82
DB		 289 len = pcmcia_get_tuple(link, 0x88, &buf);
290 if (buf && len >= 6) {
291 for (i = 0; i < 3; i++)
292 phys_addr[i] = htons(le16_to_cpu(buf[i*2]));
293 kfree(buf);
1da177e4 294 } else {
dddfbd82 295 kfree(buf); /* 0 < len < 6 */
1da177e4
LT		 296 for (i = 0; i < 3; i++)
297 phys_addr[i] = htons(read_eeprom(ioaddr, i));
b1e247ad 298 if (phys_addr[0] == htons(0x6060)) {
1da177e4
LT		 299 printk(KERN_ERR "3c589_cs: IO port conflict at 0x%03lx"
300 "-0x%03lx\n", dev->base_addr, dev->base_addr+15);
301 goto failed;
302 }
303 }
304
305 /* The address and resource configuration register aren't loaded from
306 the EEPROM and *must* be set to 0 and IRQ3 for the PCMCIA version. */
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 printk(KERN_ERR "3c589_cs: invalid if_port requested\n");
315
fd238232 316 link->dev_node = &lp->node;
dd2e5a15 317 SET_NETDEV_DEV(dev, &link->dev);
1da177e4
LT		 318
319 if (register_netdev(dev) != 0) {
320 printk(KERN_ERR "3c589_cs: register_netdev() failed\n");
fd238232 321 link->dev_node = NULL;
1da177e4
LT		 322 goto failed;
323 }
324
325 strcpy(lp->node.dev_name, dev->name);
326
0795af57 327 printk(KERN_INFO "%s: 3Com 3c%s, io %#3lx, irq %d, "
e174961c 328 "hw_addr %pM\n",
0795af57 329 dev->name, (multi ? "562" : "589"), dev->base_addr, dev->irq,
e174961c 330 dev->dev_addr);
1da177e4
LT		 331 printk(KERN_INFO " %dK FIFO split %s Rx:Tx, %s xcvr\n",
332 (fifo & 7) ? 32 : 8, ram_split[(fifo >> 16) & 3],
333 if_names[dev->if_port]);
15b99ac1 334 return 0;
1da177e4 335
1da177e4
LT		 336failed:
337 tc589_release(link);
15b99ac1 338 return -ENODEV;
1da177e4
LT		 339} /* tc589_config */
340
341/*======================================================================
342
343 After a card is removed, tc589_release() will unregister the net
344 device, and release the PCMCIA configuration. If the device is
345 still open, this will be postponed until it is closed.
346
347======================================================================*/
348
fba395ee 349static void tc589_release(struct pcmcia_device *link)
1da177e4 350{
fba395ee 351 pcmcia_disable_device(link);
1da177e4
LT		 352}
353
fba395ee 354static int tc589_suspend(struct pcmcia_device *link)
98e4c28b 355{
98e4c28b
DB		 356 struct net_device *dev = link->priv;
357
e2d40963 358 if (link->open)
8661bb5b 359 netif_device_detach(dev);
98e4c28b
DB		 360
361 return 0;
362}
363
fba395ee 364static int tc589_resume(struct pcmcia_device *link)
98e4c28b 365{
98e4c28b
DB		 366 struct net_device *dev = link->priv;
367
e2d40963 368 if (link->open) {
8661bb5b
DB		 369 tc589_reset(dev);
370 netif_device_attach(dev);
98e4c28b
DB		 371 }
372
373 return 0;
374}
375
1da177e4
LT		 376/*====================================================================*/
377
378/*
379 Use this for commands that may take time to finish
380*/
381static void tc589_wait_for_completion(struct net_device *dev, int cmd)
382{
383 int i = 100;
384 outw(cmd, dev->base_addr + EL3_CMD);
385 while (--i > 0)
386 if (!(inw(dev->base_addr + EL3_STATUS) & 0x1000)) break;
387 if (i == 0)
388 printk(KERN_WARNING "%s: command 0x%04x did not complete!\n",
389 dev->name, cmd);
390}
391
392/*
393 Read a word from the EEPROM using the regular EEPROM access register.
394 Assume that we are in register window zero.
395*/
906da809 396static u16 read_eeprom(unsigned int ioaddr, int index)
1da177e4
LT		 397{
398 int i;
399 outw(EEPROM_READ + index, ioaddr + 10);
400 /* Reading the eeprom takes 162 us */
401 for (i = 1620; i >= 0; i--)
402 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
403 break;
404 return inw(ioaddr + 12);
405}
406
407/*
408 Set transceiver type, perhaps to something other than what the user
409 specified in dev->if_port.
410*/
411static void tc589_set_xcvr(struct net_device *dev, int if_port)
412{
413 struct el3_private *lp = netdev_priv(dev);
906da809 414 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 415
416 EL3WINDOW(0);
417 switch (if_port) {
418 case 0: case 1: outw(0, ioaddr + 6); break;
419 case 2: outw(3<<14, ioaddr + 6); break;
420 case 3: outw(1<<14, ioaddr + 6); break;
421 }
422 /* On PCMCIA, this just turns on the LED */
423 outw((if_port == 2) ? StartCoax : StopCoax, ioaddr + EL3_CMD);
424 /* 10baseT interface, enable link beat and jabber check. */
425 EL3WINDOW(4);
426 outw(MEDIA_LED | ((if_port < 2) ? MEDIA_TP : 0), ioaddr + WN4_MEDIA);
427 EL3WINDOW(1);
428 if (if_port == 2)
429 lp->media_status = ((dev->if_port == 0) ? 0x8000 : 0x4000);
430 else
431 lp->media_status = ((dev->if_port == 0) ? 0x4010 : 0x8800);
432}
433
434static void dump_status(struct net_device *dev)
435{
906da809 436 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 437 EL3WINDOW(1);
438 printk(KERN_INFO " irq status %04x, rx status %04x, tx status "
439 "%02x tx free %04x\n", inw(ioaddr+EL3_STATUS),
440 inw(ioaddr+RX_STATUS), inb(ioaddr+TX_STATUS),
441 inw(ioaddr+TX_FREE));
442 EL3WINDOW(4);
443 printk(KERN_INFO " diagnostics: fifo %04x net %04x ethernet %04x"
444 " media %04x\n", inw(ioaddr+0x04), inw(ioaddr+0x06),
445 inw(ioaddr+0x08), inw(ioaddr+0x0a));
446 EL3WINDOW(1);
447}
448
449/* Reset and restore all of the 3c589 registers. */
450static void tc589_reset(struct net_device *dev)
451{
906da809 452 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 453 int i;
454
455 EL3WINDOW(0);
456 outw(0x0001, ioaddr + 4); /* Activate board. */
457 outw(0x3f00, ioaddr + 8); /* Set the IRQ line. */
458
459 /* Set the station address in window 2. */
460 EL3WINDOW(2);
461 for (i = 0; i < 6; i++)
462 outb(dev->dev_addr[i], ioaddr + i);
463
464 tc589_set_xcvr(dev, dev->if_port);
465
466 /* Switch to the stats window, and clear all stats by reading. */
467 outw(StatsDisable, ioaddr + EL3_CMD);
468 EL3WINDOW(6);
469 for (i = 0; i < 9; i++)
470 inb(ioaddr+i);
471 inw(ioaddr + 10);
472 inw(ioaddr + 12);
473
474 /* Switch to register set 1 for normal use. */
475 EL3WINDOW(1);
476
e445bb4e 477 set_rx_mode(dev);
1da177e4
LT		 478 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
479 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
480 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
481 /* Allow status bits to be seen. */
482 outw(SetStatusEnb | 0xff, ioaddr + EL3_CMD);
483 /* Ack all pending events, and set active indicator mask. */
484 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
485 ioaddr + EL3_CMD);
486 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
487 | AdapterFailure, ioaddr + EL3_CMD);
488}
489
490static void netdev_get_drvinfo(struct net_device *dev,
491 struct ethtool_drvinfo *info)
492{
493 strcpy(info->driver, DRV_NAME);
494 strcpy(info->version, DRV_VERSION);
495 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
496}
497
7282d491 498static const struct ethtool_ops netdev_ethtool_ops = {
1da177e4 499 .get_drvinfo = netdev_get_drvinfo,
1da177e4
LT		 500};
501
502static int el3_config(struct net_device *dev, struct ifmap *map)
503{
504 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
505 if (map->port <= 3) {
506 dev->if_port = map->port;
507 printk(KERN_INFO "%s: switched to %s port\n",
508 dev->name, if_names[dev->if_port]);
509 tc589_set_xcvr(dev, dev->if_port);
510 } else
511 return -EINVAL;
512 }
513 return 0;
514}
515
516static int el3_open(struct net_device *dev)
517{
518 struct el3_private *lp = netdev_priv(dev);
fba395ee 519 struct pcmcia_device *link = lp->p_dev;
1da177e4 520
9940ec36 521 if (!pcmcia_dev_present(link))
1da177e4
LT		 522 return -ENODEV;
523
524 link->open++;
525 netif_start_queue(dev);
526
527 tc589_reset(dev);
528 init_timer(&lp->media);
529 lp->media.function = &media_check;
530 lp->media.data = (unsigned long) dev;
531 lp->media.expires = jiffies + HZ;
532 add_timer(&lp->media);
533
dd0fab5b 534 dev_dbg(&link->dev, "%s: opened, status %4.4x.\n",
1da177e4
LT		 535 dev->name, inw(dev->base_addr + EL3_STATUS));
536
537 return 0;
538}
539
540static void el3_tx_timeout(struct net_device *dev)
541{
906da809 542 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 543
544 printk(KERN_WARNING "%s: Transmit timed out!\n", dev->name);
545 dump_status(dev);
cd65284f 546 dev->stats.tx_errors++;
1da177e4
LT		 547 dev->trans_start = jiffies;
548 /* Issue TX_RESET and TX_START commands. */
549 tc589_wait_for_completion(dev, TxReset);
550 outw(TxEnable, ioaddr + EL3_CMD);
551 netif_wake_queue(dev);
552}
553
554static void pop_tx_status(struct net_device *dev)
555{
906da809 556 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 557 int i;
558
559 /* Clear the Tx status stack. */
560 for (i = 32; i > 0; i--) {
561 u_char tx_status = inb(ioaddr + TX_STATUS);
562 if (!(tx_status & 0x84)) break;
563 /* reset transmitter on jabber error or underrun */
564 if (tx_status & 0x30)
565 tc589_wait_for_completion(dev, TxReset);
566 if (tx_status & 0x38) {
dd0fab5b 567 pr_debug("%s: transmit error: status 0x%02x\n",
1da177e4
LT		 568 dev->name, tx_status);
569 outw(TxEnable, ioaddr + EL3_CMD);
cd65284f 570 dev->stats.tx_aborted_errors++;
1da177e4
LT		 571 }
572 outb(0x00, ioaddr + TX_STATUS); /* Pop the status stack. */
573 }
574}
575
dbf02fae
SH		 576static netdev_tx_t el3_start_xmit(struct sk_buff *skb,
577 struct net_device *dev)
1da177e4 578{
906da809 579 unsigned int ioaddr = dev->base_addr;
1da177e4 580 struct el3_private *priv = netdev_priv(dev);
d08d2839 581 unsigned long flags;
1da177e4 582
dd0fab5b 583 pr_debug("%s: el3_start_xmit(length = %ld) called, "
1da177e4
LT		 584 "status %4.4x.\n", dev->name, (long)skb->len,
585 inw(ioaddr + EL3_STATUS));
586
d08d2839
K		 587 spin_lock_irqsave(&priv->lock, flags);
588
cd65284f 589 dev->stats.tx_bytes += skb->len;
1da177e4
LT		 590
591 /* Put out the doubleword header... */
592 outw(skb->len, ioaddr + TX_FIFO);
593 outw(0x00, ioaddr + TX_FIFO);
594 /* ... and the packet rounded to a doubleword. */
595 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
596
597 dev->trans_start = jiffies;
598 if (inw(ioaddr + TX_FREE) <= 1536) {
599 netif_stop_queue(dev);
600 /* Interrupt us when the FIFO has room for max-sized packet. */
601 outw(SetTxThreshold + 1536, ioaddr + EL3_CMD);
602 }
603
1da177e4 604 pop_tx_status(dev);
d08d2839 605 spin_unlock_irqrestore(&priv->lock, flags);
63ac9b91 606 dev_kfree_skb(skb);
1da177e4 607
6ed10654 608 return NETDEV_TX_OK;
1da177e4
LT		 609}
610
611/* The EL3 interrupt handler. */
7d12e780 612static irqreturn_t el3_interrupt(int irq, void *dev_id)
1da177e4
LT		 613{
614 struct net_device *dev = (struct net_device *) dev_id;
615 struct el3_private *lp = netdev_priv(dev);
906da809 616 unsigned int ioaddr;
1da177e4
LT		 617 __u16 status;
618 int i = 0, handled = 1;
619
620 if (!netif_device_present(dev))
621 return IRQ_NONE;
622
623 ioaddr = dev->base_addr;
624
dd0fab5b 625 pr_debug("%s: interrupt, status %4.4x.\n",
1da177e4
LT		 626 dev->name, inw(ioaddr + EL3_STATUS));
627
628 spin_lock(&lp->lock);
629 while ((status = inw(ioaddr + EL3_STATUS)) &
630 (IntLatch | RxComplete | StatsFull)) {
631 if ((status & 0xe000) != 0x2000) {
dd0fab5b 632 pr_debug("%s: interrupt from dead card\n", dev->name);
1da177e4
LT		 633 handled = 0;
634 break;
635 }
636
637 if (status & RxComplete)
638 el3_rx(dev);
639
640 if (status & TxAvailable) {
dd0fab5b 641 pr_debug(" TX room bit was handled.\n");
1da177e4
LT		 642 /* There's room in the FIFO for a full-sized packet. */
643 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
644 netif_wake_queue(dev);
645 }
646
647 if (status & TxComplete)
648 pop_tx_status(dev);
649
650 if (status & (AdapterFailure | RxEarly | StatsFull)) {
651 /* Handle all uncommon interrupts. */
652 if (status & StatsFull) /* Empty statistics. */
653 update_stats(dev);
654 if (status & RxEarly) { /* Rx early is unused. */
655 el3_rx(dev);
656 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
657 }
658 if (status & AdapterFailure) {
659 u16 fifo_diag;
660 EL3WINDOW(4);
661 fifo_diag = inw(ioaddr + 4);
662 EL3WINDOW(1);
663 printk(KERN_WARNING "%s: adapter failure, FIFO diagnostic"
664 " register %04x.\n", dev->name, fifo_diag);
665 if (fifo_diag & 0x0400) {
666 /* Tx overrun */
667 tc589_wait_for_completion(dev, TxReset);
668 outw(TxEnable, ioaddr + EL3_CMD);
669 }
670 if (fifo_diag & 0x2000) {
671 /* Rx underrun */
672 tc589_wait_for_completion(dev, RxReset);
e445bb4e 673 set_rx_mode(dev);
1da177e4
LT		 674 outw(RxEnable, ioaddr + EL3_CMD);
675 }
676 outw(AckIntr | AdapterFailure, ioaddr + EL3_CMD);
677 }
678 }
679
680 if (++i > 10) {
681 printk(KERN_ERR "%s: infinite loop in interrupt, "
682 "status %4.4x.\n", dev->name, status);
683 /* Clear all interrupts */
684 outw(AckIntr | 0xFF, ioaddr + EL3_CMD);
685 break;
686 }
687 /* Acknowledge the IRQ. */
688 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
689 }
690
691 lp->last_irq = jiffies;
692 spin_unlock(&lp->lock);
dd0fab5b 693 pr_debug("%s: exiting interrupt, status %4.4x.\n",
1da177e4
LT		 694 dev->name, inw(ioaddr + EL3_STATUS));
695 return IRQ_RETVAL(handled);
696}
697
698static void media_check(unsigned long arg)
699{
700 struct net_device *dev = (struct net_device *)(arg);
701 struct el3_private *lp = netdev_priv(dev);
906da809 702 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 703 u16 media, errs;
704 unsigned long flags;
705
706 if (!netif_device_present(dev)) goto reschedule;
707
1da177e4
LT		 708 /* Check for pending interrupt with expired latency timer: with
709 this, we can limp along even if the interrupt is blocked */
710 if ((inw(ioaddr + EL3_STATUS) & IntLatch) &&
711 (inb(ioaddr + EL3_TIMER) == 0xff)) {
712 if (!lp->fast_poll)
713 printk(KERN_WARNING "%s: interrupt(s) dropped!\n", dev->name);
671c8806
KK		 714
715 local_irq_save(flags);
d08d2839 716 el3_interrupt(dev->irq, dev);
671c8806
KK		 717 local_irq_restore(flags);
718
1da177e4
LT		 719 lp->fast_poll = HZ;
720 }
721 if (lp->fast_poll) {
722 lp->fast_poll--;
723 lp->media.expires = jiffies + HZ/100;
724 add_timer(&lp->media);
725 return;
726 }
727
728 /* lp->lock guards the EL3 window. Window should always be 1 except
729 when the lock is held */
730 spin_lock_irqsave(&lp->lock, flags);
731 EL3WINDOW(4);
732 media = inw(ioaddr+WN4_MEDIA) & 0xc810;
733
734 /* Ignore collisions unless we've had no irq's recently */
ff5688ae 735 if (time_before(jiffies, lp->last_irq + HZ)) {
1da177e4
LT		 736 media &= ~0x0010;
737 } else {
738 /* Try harder to detect carrier errors */
739 EL3WINDOW(6);
740 outw(StatsDisable, ioaddr + EL3_CMD);
741 errs = inb(ioaddr + 0);
742 outw(StatsEnable, ioaddr + EL3_CMD);
cd65284f 743 dev->stats.tx_carrier_errors += errs;
1da177e4
LT		 744 if (errs || (lp->media_status & 0x0010)) media |= 0x0010;
745 }
746
747 if (media != lp->media_status) {
748 if ((media & lp->media_status & 0x8000) &&
749 ((lp->media_status ^ media) & 0x0800))
750 printk(KERN_INFO "%s: %s link beat\n", dev->name,
751 (lp->media_status & 0x0800 ? "lost" : "found"));
752 else if ((media & lp->media_status & 0x4000) &&
753 ((lp->media_status ^ media) & 0x0010))
754 printk(KERN_INFO "%s: coax cable %s\n", dev->name,
755 (lp->media_status & 0x0010 ? "ok" : "problem"));
756 if (dev->if_port == 0) {
757 if (media & 0x8000) {
758 if (media & 0x0800)
759 printk(KERN_INFO "%s: flipped to 10baseT\n",
760 dev->name);
761 else
762 tc589_set_xcvr(dev, 2);
763 } else if (media & 0x4000) {
764 if (media & 0x0010)
765 tc589_set_xcvr(dev, 1);
766 else
767 printk(KERN_INFO "%s: flipped to 10base2\n",
768 dev->name);
769 }
770 }
771 lp->media_status = media;
772 }
773
774 EL3WINDOW(1);
775 spin_unlock_irqrestore(&lp->lock, flags);
776
777reschedule:
778 lp->media.expires = jiffies + HZ;
779 add_timer(&lp->media);
780}
781
782static struct net_device_stats *el3_get_stats(struct net_device *dev)
783{
784 struct el3_private *lp = netdev_priv(dev);
785 unsigned long flags;
fba395ee 786 struct pcmcia_device *link = lp->p_dev;
1da177e4 787
9940ec36 788 if (pcmcia_dev_present(link)) {
1da177e4
LT		 789 spin_lock_irqsave(&lp->lock, flags);
790 update_stats(dev);
791 spin_unlock_irqrestore(&lp->lock, flags);
792 }
cd65284f 793 return &dev->stats;
1da177e4
LT		 794}
795
796/*
797 Update statistics. We change to register window 6, so this should be run
798 single-threaded if the device is active. This is expected to be a rare
799 operation, and it's simpler for the rest of the driver to assume that
800 window 1 is always valid rather than use a special window-state variable.
801
802 Caller must hold the lock for this
803*/
804static void update_stats(struct net_device *dev)
805{
906da809 806 unsigned int ioaddr = dev->base_addr;
1da177e4 807
dd0fab5b 808 pr_debug("%s: updating the statistics.\n", dev->name);
1da177e4
LT		 809 /* Turn off statistics updates while reading. */
810 outw(StatsDisable, ioaddr + EL3_CMD);
811 /* Switch to the stats window, and read everything. */
812 EL3WINDOW(6);
cd65284f
PZ		 813 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
814 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
1da177e4 815 /* Multiple collisions. */ inb(ioaddr + 2);
cd65284f
PZ		 816 dev->stats.collisions += inb(ioaddr + 3);
817 dev->stats.tx_window_errors += inb(ioaddr + 4);
818 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
819 dev->stats.tx_packets += inb(ioaddr + 6);
1da177e4
LT		 820 /* Rx packets */ inb(ioaddr + 7);
821 /* Tx deferrals */ inb(ioaddr + 8);
822 /* Rx octets */ inw(ioaddr + 10);
823 /* Tx octets */ inw(ioaddr + 12);
824
825 /* Back to window 1, and turn statistics back on. */
826 EL3WINDOW(1);
827 outw(StatsEnable, ioaddr + EL3_CMD);
828}
829
830static int el3_rx(struct net_device *dev)
831{
906da809 832 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 833 int worklimit = 32;
834 short rx_status;
835
dd0fab5b 836 pr_debug("%s: in rx_packet(), status %4.4x, rx_status %4.4x.\n",
1da177e4
LT		 837 dev->name, inw(ioaddr+EL3_STATUS), inw(ioaddr+RX_STATUS));
838 while (!((rx_status = inw(ioaddr + RX_STATUS)) & 0x8000) &&
b9bdcd9b
RK		 839 worklimit > 0) {
840 worklimit--;
1da177e4
LT		 841 if (rx_status & 0x4000) { /* Error, update stats. */
842 short error = rx_status & 0x3800;
cd65284f 843 dev->stats.rx_errors++;
1da177e4 844 switch (error) {
cd65284f
PZ		 845 case 0x0000: dev->stats.rx_over_errors++; break;
846 case 0x0800: dev->stats.rx_length_errors++; break;
847 case 0x1000: dev->stats.rx_frame_errors++; break;
848 case 0x1800: dev->stats.rx_length_errors++; break;
849 case 0x2000: dev->stats.rx_frame_errors++; break;
850 case 0x2800: dev->stats.rx_crc_errors++; break;
1da177e4
LT		 851 }
852 } else {
853 short pkt_len = rx_status & 0x7ff;
854 struct sk_buff *skb;
855
856 skb = dev_alloc_skb(pkt_len+5);
857
dd0fab5b 858 pr_debug(" Receiving packet size %d status %4.4x.\n",
1da177e4
LT		 859 pkt_len, rx_status);
860 if (skb != NULL) {
1da177e4
LT		 861 skb_reserve(skb, 2);
862 insl(ioaddr+RX_FIFO, skb_put(skb, pkt_len),
863 (pkt_len+3)>>2);
864 skb->protocol = eth_type_trans(skb, dev);
865 netif_rx(skb);
cd65284f
PZ		 866 dev->stats.rx_packets++;
867 dev->stats.rx_bytes += pkt_len;
1da177e4 868 } else {
dd0fab5b 869 pr_debug("%s: couldn't allocate a sk_buff of"
1da177e4 870 " size %d.\n", dev->name, pkt_len);
cd65284f 871 dev->stats.rx_dropped++;
1da177e4
LT		 872 }
873 }
874 /* Pop the top of the Rx FIFO */
875 tc589_wait_for_completion(dev, RxDiscard);
876 }
877 if (worklimit == 0)
878 printk(KERN_WARNING "%s: too much work in el3_rx!\n", dev->name);
879 return 0;
880}
881
e445bb4e 882static void set_rx_mode(struct net_device *dev)
1da177e4 883{
906da809 884 unsigned int ioaddr = dev->base_addr;
1da177e4
LT		 885 u16 opts = SetRxFilter | RxStation | RxBroadcast;
886
1da177e4
LT		 887 if (dev->flags & IFF_PROMISC)
888 opts |= RxMulticast | RxProm;
4cd24eaf 889 else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI))
1da177e4
LT		 890 opts |= RxMulticast;
891 outw(opts, ioaddr + EL3_CMD);
892}
893
e445bb4e
KK		 894static void set_multicast_list(struct net_device *dev)
895{
896 struct el3_private *priv = netdev_priv(dev);
897 unsigned long flags;
898
899 spin_lock_irqsave(&priv->lock, flags);
900 set_rx_mode(dev);
901 spin_unlock_irqrestore(&priv->lock, flags);
902}
903
1da177e4
LT		 904static int el3_close(struct net_device *dev)
905{
906 struct el3_private *lp = netdev_priv(dev);
fba395ee 907 struct pcmcia_device *link = lp->p_dev;
906da809 908 unsigned int ioaddr = dev->base_addr;
1da177e4 909
dd0fab5b 910 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
1da177e4 911
9940ec36 912 if (pcmcia_dev_present(link)) {
cd65284f 913 /* Turn off statistics ASAP. We update dev->stats below. */
1da177e4
LT		 914 outw(StatsDisable, ioaddr + EL3_CMD);
915
916 /* Disable the receiver and transmitter. */
917 outw(RxDisable, ioaddr + EL3_CMD);
918 outw(TxDisable, ioaddr + EL3_CMD);
919
920 if (dev->if_port == 2)
921 /* Turn off thinnet power. Green! */
922 outw(StopCoax, ioaddr + EL3_CMD);
923 else if (dev->if_port == 1) {
924 /* Disable link beat and jabber */
925 EL3WINDOW(4);
926 outw(0, ioaddr + WN4_MEDIA);
927 }
928
929 /* Switching back to window 0 disables the IRQ. */
930 EL3WINDOW(0);
931 /* But we explicitly zero the IRQ line select anyway. */
932 outw(0x0f00, ioaddr + WN0_IRQ);
933
934 /* Check if the card still exists */
935 if ((inw(ioaddr+EL3_STATUS) & 0xe000) == 0x2000)
936 update_stats(dev);
937 }
938
939 link->open--;
940 netif_stop_queue(dev);
941 del_timer_sync(&lp->media);
942
943 return 0;
944}
945
7ffec58c
DB		 946static struct pcmcia_device_id tc589_ids[] = {
947 PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0101, 0x0562),
948 PCMCIA_MFC_DEVICE_PROD_ID1(0, "Motorola MARQUIS", 0xf03e4e77),
949 PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0589),
950 PCMCIA_DEVICE_PROD_ID12("Farallon", "ENet", 0x58d93fc4, 0x992c2202),
f0a3a153
KK		 951 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x0035, "cis/3CXEM556.cis"),
952 PCMCIA_MFC_DEVICE_CIS_MANF_CARD(0, 0x0101, 0x003d, "cis/3CXEM556.cis"),
7ffec58c
DB		 953 PCMCIA_DEVICE_NULL,
954};
955MODULE_DEVICE_TABLE(pcmcia, tc589_ids);
956
1da177e4
LT		 957static struct pcmcia_driver tc589_driver = {
958 .owner = THIS_MODULE,
959 .drv = {
960 .name = "3c589_cs",
961 },
15b99ac1 962 .probe = tc589_probe,
cc3b4866 963 .remove = tc589_detach,
7ffec58c 964 .id_table = tc589_ids,
98e4c28b
DB		 965 .suspend = tc589_suspend,
966 .resume = tc589_resume,
1da177e4
LT		 967};
968
969static int __init init_tc589(void)
970{
971 return pcmcia_register_driver(&tc589_driver);
972}
973
974static void __exit exit_tc589(void)
975{
976 pcmcia_unregister_driver(&tc589_driver);
1da177e4
LT		 977}
978
979module_init(init_tc589);
980module_exit(exit_tc589);
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