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Merge branch 'irq/numa' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux...
[deliverable/linux.git] / drivers / net / pcmcia / nmclan_cs.c
1 /* ----------------------------------------------------------------------------
2 Linux PCMCIA ethernet adapter driver for the New Media Ethernet LAN.
3 nmclan_cs.c,v 0.16 1995/07/01 06:42:17 rpao Exp rpao
4
5 The Ethernet LAN uses the Advanced Micro Devices (AMD) Am79C940 Media
6 Access Controller for Ethernet (MACE). It is essentially the Am2150
7 PCMCIA Ethernet card contained in the Am2150 Demo Kit.
8
9 Written by Roger C. Pao <rpao@paonet.org>
10 Copyright 1995 Roger C. Pao
11 Linux 2.5 cleanups Copyright Red Hat 2003
12
13 This software may be used and distributed according to the terms of
14 the GNU General Public License.
15
16 Ported to Linux 1.3.* network driver environment by
17 Matti Aarnio <mea@utu.fi>
18
19 References
20
21 Am2150 Technical Reference Manual, Revision 1.0, August 17, 1993
22 Am79C940 (MACE) Data Sheet, 1994
23 Am79C90 (C-LANCE) Data Sheet, 1994
24 Linux PCMCIA Programmer's Guide v1.17
25 /usr/src/linux/net/inet/dev.c, Linux kernel 1.2.8
26
27 Eric Mears, New Media Corporation
28 Tom Pollard, New Media Corporation
29 Dean Siasoyco, New Media Corporation
30 Ken Lesniak, Silicon Graphics, Inc. <lesniak@boston.sgi.com>
31 Donald Becker <becker@scyld.com>
32 David Hinds <dahinds@users.sourceforge.net>
33
34 The Linux client driver is based on the 3c589_cs.c client driver by
35 David Hinds.
36
37 The Linux network driver outline is based on the 3c589_cs.c driver,
38 the 8390.c driver, and the example skeleton.c kernel code, which are
39 by Donald Becker.
40
41 The Am2150 network driver hardware interface code is based on the
42 OS/9000 driver for the New Media Ethernet LAN by Eric Mears.
43
44 Special thanks for testing and help in debugging this driver goes
45 to Ken Lesniak.
46
47 -------------------------------------------------------------------------------
48 Driver Notes and Issues
49 -------------------------------------------------------------------------------
50
51 1. Developed on a Dell 320SLi
52 PCMCIA Card Services 2.6.2
53 Linux dell 1.2.10 #1 Thu Jun 29 20:23:41 PDT 1995 i386
54
55 2. rc.pcmcia may require loading pcmcia_core with io_speed=300:
56 'insmod pcmcia_core.o io_speed=300'.
57 This will avoid problems with fast systems which causes rx_framecnt
58 to return random values.
59
60 3. If hot extraction does not work for you, use 'ifconfig eth0 down'
61 before extraction.
62
63 4. There is a bad slow-down problem in this driver.
64
65 5. Future: Multicast processing. In the meantime, do _not_ compile your
66 kernel with multicast ip enabled.
67
68 -------------------------------------------------------------------------------
69 History
70 -------------------------------------------------------------------------------
71 Log: nmclan_cs.c,v
72 * 2.5.75-ac1 2003/07/11 Alan Cox <alan@lxorguk.ukuu.org.uk>
73 * Fixed hang on card eject as we probe it
74 * Cleaned up to use new style locking.
75 *
76 * Revision 0.16 1995/07/01 06:42:17 rpao
77 * Bug fix: nmclan_reset() called CardServices incorrectly.
78 *
79 * Revision 0.15 1995/05/24 08:09:47 rpao
80 * Re-implement MULTI_TX dev->tbusy handling.
81 *
82 * Revision 0.14 1995/05/23 03:19:30 rpao
83 * Added, in nmclan_config(), "tuple.Attributes = 0;".
84 * Modified MACE ID check to ignore chip revision level.
85 * Avoid tx_free_frames race condition between _start_xmit and _interrupt.
86 *
87 * Revision 0.13 1995/05/18 05:56:34 rpao
88 * Statistics changes.
89 * Bug fix: nmclan_reset did not enable TX and RX: call restore_multicast_list.
90 * Bug fix: mace_interrupt checks ~MACE_IMR_DEFAULT. Fixes driver lockup.
91 *
92 * Revision 0.12 1995/05/14 00:12:23 rpao
93 * Statistics overhaul.
94 *
95
96 95/05/13 rpao V0.10a
97 Bug fix: MACE statistics counters used wrong I/O ports.
98 Bug fix: mace_interrupt() needed to allow statistics to be
99 processed without RX or TX interrupts pending.
100 95/05/11 rpao V0.10
101 Multiple transmit request processing.
102 Modified statistics to use MACE counters where possible.
103 95/05/10 rpao V0.09 Bug fix: Must use IO_DATA_PATH_WIDTH_AUTO.
104 *Released
105 95/05/10 rpao V0.08
106 Bug fix: Make all non-exported functions private by using
107 static keyword.
108 Bug fix: Test IntrCnt _before_ reading MACE_IR.
109 95/05/10 rpao V0.07 Statistics.
110 95/05/09 rpao V0.06 Fix rx_framecnt problem by addition of PCIC wait states.
111
112 ---------------------------------------------------------------------------- */
113
114 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
115
116 #define DRV_NAME "nmclan_cs"
117 #define DRV_VERSION "0.16"
118
119
120 /* ----------------------------------------------------------------------------
121 Conditional Compilation Options
122 ---------------------------------------------------------------------------- */
123
124 #define MULTI_TX 0
125 #define RESET_ON_TIMEOUT 1
126 #define TX_INTERRUPTABLE 1
127 #define RESET_XILINX 0
128
129 /* ----------------------------------------------------------------------------
130 Include Files
131 ---------------------------------------------------------------------------- */
132
133 #include <linux/module.h>
134 #include <linux/kernel.h>
135 #include <linux/init.h>
136 #include <linux/ptrace.h>
137 #include <linux/slab.h>
138 #include <linux/string.h>
139 #include <linux/timer.h>
140 #include <linux/interrupt.h>
141 #include <linux/in.h>
142 #include <linux/delay.h>
143 #include <linux/ethtool.h>
144 #include <linux/netdevice.h>
145 #include <linux/etherdevice.h>
146 #include <linux/skbuff.h>
147 #include <linux/if_arp.h>
148 #include <linux/ioport.h>
149 #include <linux/bitops.h>
150
151 #include <pcmcia/cisreg.h>
152 #include <pcmcia/cistpl.h>
153 #include <pcmcia/ds.h>
154
155 #include <asm/uaccess.h>
156 #include <asm/io.h>
157 #include <asm/system.h>
158
159 /* ----------------------------------------------------------------------------
160 Defines
161 ---------------------------------------------------------------------------- */
162
163 #define ETHER_ADDR_LEN ETH_ALEN
164 /* 6 bytes in an Ethernet Address */
165 #define MACE_LADRF_LEN 8
166 /* 8 bytes in Logical Address Filter */
167
168 /* Loop Control Defines */
169 #define MACE_MAX_IR_ITERATIONS 10
170 #define MACE_MAX_RX_ITERATIONS 12
171 /*
172 TBD: Dean brought this up, and I assumed the hardware would
173 handle it:
174
175 If MACE_MAX_RX_ITERATIONS is > 1, rx_framecnt may still be
176 non-zero when the isr exits. We may not get another interrupt
177 to process the remaining packets for some time.
178 */
179
180 /*
181 The Am2150 has a Xilinx XC3042 field programmable gate array (FPGA)
182 which manages the interface between the MACE and the PCMCIA bus. It
183 also includes buffer management for the 32K x 8 SRAM to control up to
184 four transmit and 12 receive frames at a time.
185 */
186 #define AM2150_MAX_TX_FRAMES 4
187 #define AM2150_MAX_RX_FRAMES 12
188
189 /* Am2150 Ethernet Card I/O Mapping */
190 #define AM2150_RCV 0x00
191 #define AM2150_XMT 0x04
192 #define AM2150_XMT_SKIP 0x09
193 #define AM2150_RCV_NEXT 0x0A
194 #define AM2150_RCV_FRAME_COUNT 0x0B
195 #define AM2150_MACE_BANK 0x0C
196 #define AM2150_MACE_BASE 0x10
197
198 /* MACE Registers */
199 #define MACE_RCVFIFO 0
200 #define MACE_XMTFIFO 1
201 #define MACE_XMTFC 2
202 #define MACE_XMTFS 3
203 #define MACE_XMTRC 4
204 #define MACE_RCVFC 5
205 #define MACE_RCVFS 6
206 #define MACE_FIFOFC 7
207 #define MACE_IR 8
208 #define MACE_IMR 9
209 #define MACE_PR 10
210 #define MACE_BIUCC 11
211 #define MACE_FIFOCC 12
212 #define MACE_MACCC 13
213 #define MACE_PLSCC 14
214 #define MACE_PHYCC 15
215 #define MACE_CHIPIDL 16
216 #define MACE_CHIPIDH 17
217 #define MACE_IAC 18
218 /* Reserved */
219 #define MACE_LADRF 20
220 #define MACE_PADR 21
221 /* Reserved */
222 /* Reserved */
223 #define MACE_MPC 24
224 /* Reserved */
225 #define MACE_RNTPC 26
226 #define MACE_RCVCC 27
227 /* Reserved */
228 #define MACE_UTR 29
229 #define MACE_RTR1 30
230 #define MACE_RTR2 31
231
232 /* MACE Bit Masks */
233 #define MACE_XMTRC_EXDEF 0x80
234 #define MACE_XMTRC_XMTRC 0x0F
235
236 #define MACE_XMTFS_XMTSV 0x80
237 #define MACE_XMTFS_UFLO 0x40
238 #define MACE_XMTFS_LCOL 0x20
239 #define MACE_XMTFS_MORE 0x10
240 #define MACE_XMTFS_ONE 0x08
241 #define MACE_XMTFS_DEFER 0x04
242 #define MACE_XMTFS_LCAR 0x02
243 #define MACE_XMTFS_RTRY 0x01
244
245 #define MACE_RCVFS_RCVSTS 0xF000
246 #define MACE_RCVFS_OFLO 0x8000
247 #define MACE_RCVFS_CLSN 0x4000
248 #define MACE_RCVFS_FRAM 0x2000
249 #define MACE_RCVFS_FCS 0x1000
250
251 #define MACE_FIFOFC_RCVFC 0xF0
252 #define MACE_FIFOFC_XMTFC 0x0F
253
254 #define MACE_IR_JAB 0x80
255 #define MACE_IR_BABL 0x40
256 #define MACE_IR_CERR 0x20
257 #define MACE_IR_RCVCCO 0x10
258 #define MACE_IR_RNTPCO 0x08
259 #define MACE_IR_MPCO 0x04
260 #define MACE_IR_RCVINT 0x02
261 #define MACE_IR_XMTINT 0x01
262
263 #define MACE_MACCC_PROM 0x80
264 #define MACE_MACCC_DXMT2PD 0x40
265 #define MACE_MACCC_EMBA 0x20
266 #define MACE_MACCC_RESERVED 0x10
267 #define MACE_MACCC_DRCVPA 0x08
268 #define MACE_MACCC_DRCVBC 0x04
269 #define MACE_MACCC_ENXMT 0x02
270 #define MACE_MACCC_ENRCV 0x01
271
272 #define MACE_PHYCC_LNKFL 0x80
273 #define MACE_PHYCC_DLNKTST 0x40
274 #define MACE_PHYCC_REVPOL 0x20
275 #define MACE_PHYCC_DAPC 0x10
276 #define MACE_PHYCC_LRT 0x08
277 #define MACE_PHYCC_ASEL 0x04
278 #define MACE_PHYCC_RWAKE 0x02
279 #define MACE_PHYCC_AWAKE 0x01
280
281 #define MACE_IAC_ADDRCHG 0x80
282 #define MACE_IAC_PHYADDR 0x04
283 #define MACE_IAC_LOGADDR 0x02
284
285 #define MACE_UTR_RTRE 0x80
286 #define MACE_UTR_RTRD 0x40
287 #define MACE_UTR_RPA 0x20
288 #define MACE_UTR_FCOLL 0x10
289 #define MACE_UTR_RCVFCSE 0x08
290 #define MACE_UTR_LOOP_INCL_MENDEC 0x06
291 #define MACE_UTR_LOOP_NO_MENDEC 0x04
292 #define MACE_UTR_LOOP_EXTERNAL 0x02
293 #define MACE_UTR_LOOP_NONE 0x00
294 #define MACE_UTR_RESERVED 0x01
295
296 /* Switch MACE register bank (only 0 and 1 are valid) */
297 #define MACEBANK(win_num) outb((win_num), ioaddr + AM2150_MACE_BANK)
298
299 #define MACE_IMR_DEFAULT \
300 (0xFF - \
301 ( \
302 MACE_IR_CERR | \
303 MACE_IR_RCVCCO | \
304 MACE_IR_RNTPCO | \
305 MACE_IR_MPCO | \
306 MACE_IR_RCVINT | \
307 MACE_IR_XMTINT \
308 ) \
309 )
310 #undef MACE_IMR_DEFAULT
311 #define MACE_IMR_DEFAULT 0x00 /* New statistics handling: grab everything */
312
313 #define TX_TIMEOUT ((400*HZ)/1000)
314
315 /* ----------------------------------------------------------------------------
316 Type Definitions
317 ---------------------------------------------------------------------------- */
318
319 typedef struct _mace_statistics {
320 /* MACE_XMTFS */
321 int xmtsv;
322 int uflo;
323 int lcol;
324 int more;
325 int one;
326 int defer;
327 int lcar;
328 int rtry;
329
330 /* MACE_XMTRC */
331 int exdef;
332 int xmtrc;
333
334 /* RFS1--Receive Status (RCVSTS) */
335 int oflo;
336 int clsn;
337 int fram;
338 int fcs;
339
340 /* RFS2--Runt Packet Count (RNTPC) */
341 int rfs_rntpc;
342
343 /* RFS3--Receive Collision Count (RCVCC) */
344 int rfs_rcvcc;
345
346 /* MACE_IR */
347 int jab;
348 int babl;
349 int cerr;
350 int rcvcco;
351 int rntpco;
352 int mpco;
353
354 /* MACE_MPC */
355 int mpc;
356
357 /* MACE_RNTPC */
358 int rntpc;
359
360 /* MACE_RCVCC */
361 int rcvcc;
362 } mace_statistics;
363
364 typedef struct _mace_private {
365 struct pcmcia_device *p_dev;
366 struct net_device_stats linux_stats; /* Linux statistics counters */
367 mace_statistics mace_stats; /* MACE chip statistics counters */
368
369 /* restore_multicast_list() state variables */
370 int multicast_ladrf[MACE_LADRF_LEN]; /* Logical address filter */
371 int multicast_num_addrs;
372
373 char tx_free_frames; /* Number of free transmit frame buffers */
374 char tx_irq_disabled; /* MACE TX interrupt disabled */
375
376 spinlock_t bank_lock; /* Must be held if you step off bank 0 */
377 } mace_private;
378
379 /* ----------------------------------------------------------------------------
380 Private Global Variables
381 ---------------------------------------------------------------------------- */
382
383 static const char *if_names[]={
384 "Auto", "10baseT", "BNC",
385 };
386
387 /* ----------------------------------------------------------------------------
388 Parameters
389 These are the parameters that can be set during loading with
390 'insmod'.
391 ---------------------------------------------------------------------------- */
392
393 MODULE_DESCRIPTION("New Media PCMCIA ethernet driver");
394 MODULE_LICENSE("GPL");
395
396 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
397
398 /* 0=auto, 1=10baseT, 2 = 10base2, default=auto */
399 INT_MODULE_PARM(if_port, 0);
400
401
402 /* ----------------------------------------------------------------------------
403 Function Prototypes
404 ---------------------------------------------------------------------------- */
405
406 static int nmclan_config(struct pcmcia_device *link);
407 static void nmclan_release(struct pcmcia_device *link);
408
409 static void nmclan_reset(struct net_device *dev);
410 static int mace_config(struct net_device *dev, struct ifmap *map);
411 static int mace_open(struct net_device *dev);
412 static int mace_close(struct net_device *dev);
413 static netdev_tx_t mace_start_xmit(struct sk_buff *skb,
414 struct net_device *dev);
415 static void mace_tx_timeout(struct net_device *dev);
416 static irqreturn_t mace_interrupt(int irq, void *dev_id);
417 static struct net_device_stats *mace_get_stats(struct net_device *dev);
418 static int mace_rx(struct net_device *dev, unsigned char RxCnt);
419 static void restore_multicast_list(struct net_device *dev);
420 static void set_multicast_list(struct net_device *dev);
421 static const struct ethtool_ops netdev_ethtool_ops;
422
423
424 static void nmclan_detach(struct pcmcia_device *p_dev);
425
426 static const struct net_device_ops mace_netdev_ops = {
427 .ndo_open = mace_open,
428 .ndo_stop = mace_close,
429 .ndo_start_xmit = mace_start_xmit,
430 .ndo_tx_timeout = mace_tx_timeout,
431 .ndo_set_config = mace_config,
432 .ndo_get_stats = mace_get_stats,
433 .ndo_set_multicast_list = set_multicast_list,
434 .ndo_change_mtu = eth_change_mtu,
435 .ndo_set_mac_address = eth_mac_addr,
436 .ndo_validate_addr = eth_validate_addr,
437 };
438
439 static int nmclan_probe(struct pcmcia_device *link)
440 {
441 mace_private *lp;
442 struct net_device *dev;
443
444 dev_dbg(&link->dev, "nmclan_attach()\n");
445
446 /* Create new ethernet device */
447 dev = alloc_etherdev(sizeof(mace_private));
448 if (!dev)
449 return -ENOMEM;
450 lp = netdev_priv(dev);
451 lp->p_dev = link;
452 link->priv = dev;
453
454 spin_lock_init(&lp->bank_lock);
455 link->resource[0]->end = 32;
456 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
457 link->config_flags |= CONF_ENABLE_IRQ;
458 link->config_index = 1;
459 link->config_regs = PRESENT_OPTION;
460
461 lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
462
463 dev->netdev_ops = &mace_netdev_ops;
464 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
465 dev->watchdog_timeo = TX_TIMEOUT;
466
467 return nmclan_config(link);
468 } /* nmclan_attach */
469
470 static void nmclan_detach(struct pcmcia_device *link)
471 {
472 struct net_device *dev = link->priv;
473
474 dev_dbg(&link->dev, "nmclan_detach\n");
475
476 unregister_netdev(dev);
477
478 nmclan_release(link);
479
480 free_netdev(dev);
481 } /* nmclan_detach */
482
483 /* ----------------------------------------------------------------------------
484 mace_read
485 Reads a MACE register. This is bank independent; however, the
486 caller must ensure that this call is not interruptable. We are
487 assuming that during normal operation, the MACE is always in
488 bank 0.
489 ---------------------------------------------------------------------------- */
490 static int mace_read(mace_private *lp, unsigned int ioaddr, int reg)
491 {
492 int data = 0xFF;
493 unsigned long flags;
494
495 switch (reg >> 4) {
496 case 0: /* register 0-15 */
497 data = inb(ioaddr + AM2150_MACE_BASE + reg);
498 break;
499 case 1: /* register 16-31 */
500 spin_lock_irqsave(&lp->bank_lock, flags);
501 MACEBANK(1);
502 data = inb(ioaddr + AM2150_MACE_BASE + (reg & 0x0F));
503 MACEBANK(0);
504 spin_unlock_irqrestore(&lp->bank_lock, flags);
505 break;
506 }
507 return data & 0xFF;
508 } /* mace_read */
509
510 /* ----------------------------------------------------------------------------
511 mace_write
512 Writes to a MACE register. This is bank independent; however,
513 the caller must ensure that this call is not interruptable. We
514 are assuming that during normal operation, the MACE is always in
515 bank 0.
516 ---------------------------------------------------------------------------- */
517 static void mace_write(mace_private *lp, unsigned int ioaddr, int reg,
518 int data)
519 {
520 unsigned long flags;
521
522 switch (reg >> 4) {
523 case 0: /* register 0-15 */
524 outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + reg);
525 break;
526 case 1: /* register 16-31 */
527 spin_lock_irqsave(&lp->bank_lock, flags);
528 MACEBANK(1);
529 outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + (reg & 0x0F));
530 MACEBANK(0);
531 spin_unlock_irqrestore(&lp->bank_lock, flags);
532 break;
533 }
534 } /* mace_write */
535
536 /* ----------------------------------------------------------------------------
537 mace_init
538 Resets the MACE chip.
539 ---------------------------------------------------------------------------- */
540 static int mace_init(mace_private *lp, unsigned int ioaddr, char *enet_addr)
541 {
542 int i;
543 int ct = 0;
544
545 /* MACE Software reset */
546 mace_write(lp, ioaddr, MACE_BIUCC, 1);
547 while (mace_read(lp, ioaddr, MACE_BIUCC) & 0x01) {
548 /* Wait for reset bit to be cleared automatically after <= 200ns */;
549 if(++ct > 500)
550 {
551 pr_err("reset failed, card removed?\n");
552 return -1;
553 }
554 udelay(1);
555 }
556 mace_write(lp, ioaddr, MACE_BIUCC, 0);
557
558 /* The Am2150 requires that the MACE FIFOs operate in burst mode. */
559 mace_write(lp, ioaddr, MACE_FIFOCC, 0x0F);
560
561 mace_write(lp,ioaddr, MACE_RCVFC, 0); /* Disable Auto Strip Receive */
562 mace_write(lp, ioaddr, MACE_IMR, 0xFF); /* Disable all interrupts until _open */
563
564 /*
565 * Bit 2-1 PORTSEL[1-0] Port Select.
566 * 00 AUI/10Base-2
567 * 01 10Base-T
568 * 10 DAI Port (reserved in Am2150)
569 * 11 GPSI
570 * For this card, only the first two are valid.
571 * So, PLSCC should be set to
572 * 0x00 for 10Base-2
573 * 0x02 for 10Base-T
574 * Or just set ASEL in PHYCC below!
575 */
576 switch (if_port) {
577 case 1:
578 mace_write(lp, ioaddr, MACE_PLSCC, 0x02);
579 break;
580 case 2:
581 mace_write(lp, ioaddr, MACE_PLSCC, 0x00);
582 break;
583 default:
584 mace_write(lp, ioaddr, MACE_PHYCC, /* ASEL */ 4);
585 /* ASEL Auto Select. When set, the PORTSEL[1-0] bits are overridden,
586 and the MACE device will automatically select the operating media
587 interface port. */
588 break;
589 }
590
591 mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_PHYADDR);
592 /* Poll ADDRCHG bit */
593 ct = 0;
594 while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG)
595 {
596 if(++ ct > 500)
597 {
598 pr_err("ADDRCHG timeout, card removed?\n");
599 return -1;
600 }
601 }
602 /* Set PADR register */
603 for (i = 0; i < ETHER_ADDR_LEN; i++)
604 mace_write(lp, ioaddr, MACE_PADR, enet_addr[i]);
605
606 /* MAC Configuration Control Register should be written last */
607 /* Let set_multicast_list set this. */
608 /* mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV); */
609 mace_write(lp, ioaddr, MACE_MACCC, 0x00);
610 return 0;
611 } /* mace_init */
612
613 static int nmclan_config(struct pcmcia_device *link)
614 {
615 struct net_device *dev = link->priv;
616 mace_private *lp = netdev_priv(dev);
617 u8 *buf;
618 size_t len;
619 int i, ret;
620 unsigned int ioaddr;
621
622 dev_dbg(&link->dev, "nmclan_config\n");
623
624 link->io_lines = 5;
625 ret = pcmcia_request_io(link);
626 if (ret)
627 goto failed;
628 ret = pcmcia_request_exclusive_irq(link, mace_interrupt);
629 if (ret)
630 goto failed;
631 ret = pcmcia_enable_device(link);
632 if (ret)
633 goto failed;
634
635 dev->irq = link->irq;
636 dev->base_addr = link->resource[0]->start;
637
638 ioaddr = dev->base_addr;
639
640 /* Read the ethernet address from the CIS. */
641 len = pcmcia_get_tuple(link, 0x80, &buf);
642 if (!buf || len < ETHER_ADDR_LEN) {
643 kfree(buf);
644 goto failed;
645 }
646 memcpy(dev->dev_addr, buf, ETHER_ADDR_LEN);
647 kfree(buf);
648
649 /* Verify configuration by reading the MACE ID. */
650 {
651 char sig[2];
652
653 sig[0] = mace_read(lp, ioaddr, MACE_CHIPIDL);
654 sig[1] = mace_read(lp, ioaddr, MACE_CHIPIDH);
655 if ((sig[0] == 0x40) && ((sig[1] & 0x0F) == 0x09)) {
656 dev_dbg(&link->dev, "nmclan_cs configured: mace id=%x %x\n",
657 sig[0], sig[1]);
658 } else {
659 pr_notice("mace id not found: %x %x should be 0x40 0x?9\n",
660 sig[0], sig[1]);
661 return -ENODEV;
662 }
663 }
664
665 if(mace_init(lp, ioaddr, dev->dev_addr) == -1)
666 goto failed;
667
668 /* The if_port symbol can be set when the module is loaded */
669 if (if_port <= 2)
670 dev->if_port = if_port;
671 else
672 pr_notice("invalid if_port requested\n");
673
674 SET_NETDEV_DEV(dev, &link->dev);
675
676 i = register_netdev(dev);
677 if (i != 0) {
678 pr_notice("register_netdev() failed\n");
679 goto failed;
680 }
681
682 netdev_info(dev, "nmclan: port %#3lx, irq %d, %s port, hw_addr %pM\n",
683 dev->base_addr, dev->irq, if_names[dev->if_port], dev->dev_addr);
684 return 0;
685
686 failed:
687 nmclan_release(link);
688 return -ENODEV;
689 } /* nmclan_config */
690
691 static void nmclan_release(struct pcmcia_device *link)
692 {
693 dev_dbg(&link->dev, "nmclan_release\n");
694 pcmcia_disable_device(link);
695 }
696
697 static int nmclan_suspend(struct pcmcia_device *link)
698 {
699 struct net_device *dev = link->priv;
700
701 if (link->open)
702 netif_device_detach(dev);
703
704 return 0;
705 }
706
707 static int nmclan_resume(struct pcmcia_device *link)
708 {
709 struct net_device *dev = link->priv;
710
711 if (link->open) {
712 nmclan_reset(dev);
713 netif_device_attach(dev);
714 }
715
716 return 0;
717 }
718
719
720 /* ----------------------------------------------------------------------------
721 nmclan_reset
722 Reset and restore all of the Xilinx and MACE registers.
723 ---------------------------------------------------------------------------- */
724 static void nmclan_reset(struct net_device *dev)
725 {
726 mace_private *lp = netdev_priv(dev);
727
728 #if RESET_XILINX
729 struct pcmcia_device *link = &lp->link;
730 u8 OrigCorValue;
731
732 /* Save original COR value */
733 pcmcia_read_config_byte(link, CISREG_COR, &OrigCorValue);
734
735 /* Reset Xilinx */
736 dev_dbg(&link->dev, "nmclan_reset: OrigCorValue=0x%x, resetting...\n",
737 OrigCorValue);
738 pcmcia_write_config_byte(link, CISREG_COR, COR_SOFT_RESET);
739 /* Need to wait for 20 ms for PCMCIA to finish reset. */
740
741 /* Restore original COR configuration index */
742 pcmcia_write_config_byte(link, CISREG_COR,
743 (COR_LEVEL_REQ | (OrigCorValue & COR_CONFIG_MASK)));
744 /* Xilinx is now completely reset along with the MACE chip. */
745 lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
746
747 #endif /* #if RESET_XILINX */
748
749 /* Xilinx is now completely reset along with the MACE chip. */
750 lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
751
752 /* Reinitialize the MACE chip for operation. */
753 mace_init(lp, dev->base_addr, dev->dev_addr);
754 mace_write(lp, dev->base_addr, MACE_IMR, MACE_IMR_DEFAULT);
755
756 /* Restore the multicast list and enable TX and RX. */
757 restore_multicast_list(dev);
758 } /* nmclan_reset */
759
760 /* ----------------------------------------------------------------------------
761 mace_config
762 [Someone tell me what this is supposed to do? Is if_port a defined
763 standard? If so, there should be defines to indicate 1=10Base-T,
764 2=10Base-2, etc. including limited automatic detection.]
765 ---------------------------------------------------------------------------- */
766 static int mace_config(struct net_device *dev, struct ifmap *map)
767 {
768 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
769 if (map->port <= 2) {
770 dev->if_port = map->port;
771 netdev_info(dev, "switched to %s port\n", if_names[dev->if_port]);
772 } else
773 return -EINVAL;
774 }
775 return 0;
776 } /* mace_config */
777
778 /* ----------------------------------------------------------------------------
779 mace_open
780 Open device driver.
781 ---------------------------------------------------------------------------- */
782 static int mace_open(struct net_device *dev)
783 {
784 unsigned int ioaddr = dev->base_addr;
785 mace_private *lp = netdev_priv(dev);
786 struct pcmcia_device *link = lp->p_dev;
787
788 if (!pcmcia_dev_present(link))
789 return -ENODEV;
790
791 link->open++;
792
793 MACEBANK(0);
794
795 netif_start_queue(dev);
796 nmclan_reset(dev);
797
798 return 0; /* Always succeed */
799 } /* mace_open */
800
801 /* ----------------------------------------------------------------------------
802 mace_close
803 Closes device driver.
804 ---------------------------------------------------------------------------- */
805 static int mace_close(struct net_device *dev)
806 {
807 unsigned int ioaddr = dev->base_addr;
808 mace_private *lp = netdev_priv(dev);
809 struct pcmcia_device *link = lp->p_dev;
810
811 dev_dbg(&link->dev, "%s: shutting down ethercard.\n", dev->name);
812
813 /* Mask off all interrupts from the MACE chip. */
814 outb(0xFF, ioaddr + AM2150_MACE_BASE + MACE_IMR);
815
816 link->open--;
817 netif_stop_queue(dev);
818
819 return 0;
820 } /* mace_close */
821
822 static void netdev_get_drvinfo(struct net_device *dev,
823 struct ethtool_drvinfo *info)
824 {
825 strcpy(info->driver, DRV_NAME);
826 strcpy(info->version, DRV_VERSION);
827 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
828 }
829
830 static const struct ethtool_ops netdev_ethtool_ops = {
831 .get_drvinfo = netdev_get_drvinfo,
832 };
833
834 /* ----------------------------------------------------------------------------
835 mace_start_xmit
836 This routine begins the packet transmit function. When completed,
837 it will generate a transmit interrupt.
838
839 According to /usr/src/linux/net/inet/dev.c, if _start_xmit
840 returns 0, the "packet is now solely the responsibility of the
841 driver." If _start_xmit returns non-zero, the "transmission
842 failed, put skb back into a list."
843 ---------------------------------------------------------------------------- */
844
845 static void mace_tx_timeout(struct net_device *dev)
846 {
847 mace_private *lp = netdev_priv(dev);
848 struct pcmcia_device *link = lp->p_dev;
849
850 netdev_notice(dev, "transmit timed out -- ");
851 #if RESET_ON_TIMEOUT
852 pr_cont("resetting card\n");
853 pcmcia_reset_card(link->socket);
854 #else /* #if RESET_ON_TIMEOUT */
855 pr_cont("NOT resetting card\n");
856 #endif /* #if RESET_ON_TIMEOUT */
857 dev->trans_start = jiffies; /* prevent tx timeout */
858 netif_wake_queue(dev);
859 }
860
861 static netdev_tx_t mace_start_xmit(struct sk_buff *skb,
862 struct net_device *dev)
863 {
864 mace_private *lp = netdev_priv(dev);
865 unsigned int ioaddr = dev->base_addr;
866
867 netif_stop_queue(dev);
868
869 pr_debug("%s: mace_start_xmit(length = %ld) called.\n",
870 dev->name, (long)skb->len);
871
872 #if (!TX_INTERRUPTABLE)
873 /* Disable MACE TX interrupts. */
874 outb(MACE_IMR_DEFAULT | MACE_IR_XMTINT,
875 ioaddr + AM2150_MACE_BASE + MACE_IMR);
876 lp->tx_irq_disabled=1;
877 #endif /* #if (!TX_INTERRUPTABLE) */
878
879 {
880 /* This block must not be interrupted by another transmit request!
881 mace_tx_timeout will take care of timer-based retransmissions from
882 the upper layers. The interrupt handler is guaranteed never to
883 service a transmit interrupt while we are in here.
884 */
885
886 lp->linux_stats.tx_bytes += skb->len;
887 lp->tx_free_frames--;
888
889 /* WARNING: Write the _exact_ number of bytes written in the header! */
890 /* Put out the word header [must be an outw()] . . . */
891 outw(skb->len, ioaddr + AM2150_XMT);
892 /* . . . and the packet [may be any combination of outw() and outb()] */
893 outsw(ioaddr + AM2150_XMT, skb->data, skb->len >> 1);
894 if (skb->len & 1) {
895 /* Odd byte transfer */
896 outb(skb->data[skb->len-1], ioaddr + AM2150_XMT);
897 }
898
899 #if MULTI_TX
900 if (lp->tx_free_frames > 0)
901 netif_start_queue(dev);
902 #endif /* #if MULTI_TX */
903 }
904
905 #if (!TX_INTERRUPTABLE)
906 /* Re-enable MACE TX interrupts. */
907 lp->tx_irq_disabled=0;
908 outb(MACE_IMR_DEFAULT, ioaddr + AM2150_MACE_BASE + MACE_IMR);
909 #endif /* #if (!TX_INTERRUPTABLE) */
910
911 dev_kfree_skb(skb);
912
913 return NETDEV_TX_OK;
914 } /* mace_start_xmit */
915
916 /* ----------------------------------------------------------------------------
917 mace_interrupt
918 The interrupt handler.
919 ---------------------------------------------------------------------------- */
920 static irqreturn_t mace_interrupt(int irq, void *dev_id)
921 {
922 struct net_device *dev = (struct net_device *) dev_id;
923 mace_private *lp = netdev_priv(dev);
924 unsigned int ioaddr;
925 int status;
926 int IntrCnt = MACE_MAX_IR_ITERATIONS;
927
928 if (dev == NULL) {
929 pr_debug("mace_interrupt(): irq 0x%X for unknown device.\n",
930 irq);
931 return IRQ_NONE;
932 }
933
934 ioaddr = dev->base_addr;
935
936 if (lp->tx_irq_disabled) {
937 const char *msg;
938 if (lp->tx_irq_disabled)
939 msg = "Interrupt with tx_irq_disabled";
940 else
941 msg = "Re-entering the interrupt handler";
942 netdev_notice(dev, "%s [isr=%02X, imr=%02X]\n",
943 msg,
944 inb(ioaddr + AM2150_MACE_BASE + MACE_IR),
945 inb(ioaddr + AM2150_MACE_BASE + MACE_IMR));
946 /* WARNING: MACE_IR has been read! */
947 return IRQ_NONE;
948 }
949
950 if (!netif_device_present(dev)) {
951 netdev_dbg(dev, "interrupt from dead card\n");
952 return IRQ_NONE;
953 }
954
955 do {
956 /* WARNING: MACE_IR is a READ/CLEAR port! */
957 status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR);
958
959 pr_debug("mace_interrupt: irq 0x%X status 0x%X.\n", irq, status);
960
961 if (status & MACE_IR_RCVINT) {
962 mace_rx(dev, MACE_MAX_RX_ITERATIONS);
963 }
964
965 if (status & MACE_IR_XMTINT) {
966 unsigned char fifofc;
967 unsigned char xmtrc;
968 unsigned char xmtfs;
969
970 fifofc = inb(ioaddr + AM2150_MACE_BASE + MACE_FIFOFC);
971 if ((fifofc & MACE_FIFOFC_XMTFC)==0) {
972 lp->linux_stats.tx_errors++;
973 outb(0xFF, ioaddr + AM2150_XMT_SKIP);
974 }
975
976 /* Transmit Retry Count (XMTRC, reg 4) */
977 xmtrc = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTRC);
978 if (xmtrc & MACE_XMTRC_EXDEF) lp->mace_stats.exdef++;
979 lp->mace_stats.xmtrc += (xmtrc & MACE_XMTRC_XMTRC);
980
981 if (
982 (xmtfs = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTFS)) &
983 MACE_XMTFS_XMTSV /* Transmit Status Valid */
984 ) {
985 lp->mace_stats.xmtsv++;
986
987 if (xmtfs & ~MACE_XMTFS_XMTSV) {
988 if (xmtfs & MACE_XMTFS_UFLO) {
989 /* Underflow. Indicates that the Transmit FIFO emptied before
990 the end of frame was reached. */
991 lp->mace_stats.uflo++;
992 }
993 if (xmtfs & MACE_XMTFS_LCOL) {
994 /* Late Collision */
995 lp->mace_stats.lcol++;
996 }
997 if (xmtfs & MACE_XMTFS_MORE) {
998 /* MORE than one retry was needed */
999 lp->mace_stats.more++;
1000 }
1001 if (xmtfs & MACE_XMTFS_ONE) {
1002 /* Exactly ONE retry occurred */
1003 lp->mace_stats.one++;
1004 }
1005 if (xmtfs & MACE_XMTFS_DEFER) {
1006 /* Transmission was defered */
1007 lp->mace_stats.defer++;
1008 }
1009 if (xmtfs & MACE_XMTFS_LCAR) {
1010 /* Loss of carrier */
1011 lp->mace_stats.lcar++;
1012 }
1013 if (xmtfs & MACE_XMTFS_RTRY) {
1014 /* Retry error: transmit aborted after 16 attempts */
1015 lp->mace_stats.rtry++;
1016 }
1017 } /* if (xmtfs & ~MACE_XMTFS_XMTSV) */
1018
1019 } /* if (xmtfs & MACE_XMTFS_XMTSV) */
1020
1021 lp->linux_stats.tx_packets++;
1022 lp->tx_free_frames++;
1023 netif_wake_queue(dev);
1024 } /* if (status & MACE_IR_XMTINT) */
1025
1026 if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) {
1027 if (status & MACE_IR_JAB) {
1028 /* Jabber Error. Excessive transmit duration (20-150ms). */
1029 lp->mace_stats.jab++;
1030 }
1031 if (status & MACE_IR_BABL) {
1032 /* Babble Error. >1518 bytes transmitted. */
1033 lp->mace_stats.babl++;
1034 }
1035 if (status & MACE_IR_CERR) {
1036 /* Collision Error. CERR indicates the absence of the
1037 Signal Quality Error Test message after a packet
1038 transmission. */
1039 lp->mace_stats.cerr++;
1040 }
1041 if (status & MACE_IR_RCVCCO) {
1042 /* Receive Collision Count Overflow; */
1043 lp->mace_stats.rcvcco++;
1044 }
1045 if (status & MACE_IR_RNTPCO) {
1046 /* Runt Packet Count Overflow */
1047 lp->mace_stats.rntpco++;
1048 }
1049 if (status & MACE_IR_MPCO) {
1050 /* Missed Packet Count Overflow */
1051 lp->mace_stats.mpco++;
1052 }
1053 } /* if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) */
1054
1055 } while ((status & ~MACE_IMR_DEFAULT) && (--IntrCnt));
1056
1057 return IRQ_HANDLED;
1058 } /* mace_interrupt */
1059
1060 /* ----------------------------------------------------------------------------
1061 mace_rx
1062 Receives packets.
1063 ---------------------------------------------------------------------------- */
1064 static int mace_rx(struct net_device *dev, unsigned char RxCnt)
1065 {
1066 mace_private *lp = netdev_priv(dev);
1067 unsigned int ioaddr = dev->base_addr;
1068 unsigned char rx_framecnt;
1069 unsigned short rx_status;
1070
1071 while (
1072 ((rx_framecnt = inb(ioaddr + AM2150_RCV_FRAME_COUNT)) > 0) &&
1073 (rx_framecnt <= 12) && /* rx_framecnt==0xFF if card is extracted. */
1074 (RxCnt--)
1075 ) {
1076 rx_status = inw(ioaddr + AM2150_RCV);
1077
1078 pr_debug("%s: in mace_rx(), framecnt 0x%X, rx_status"
1079 " 0x%X.\n", dev->name, rx_framecnt, rx_status);
1080
1081 if (rx_status & MACE_RCVFS_RCVSTS) { /* Error, update stats. */
1082 lp->linux_stats.rx_errors++;
1083 if (rx_status & MACE_RCVFS_OFLO) {
1084 lp->mace_stats.oflo++;
1085 }
1086 if (rx_status & MACE_RCVFS_CLSN) {
1087 lp->mace_stats.clsn++;
1088 }
1089 if (rx_status & MACE_RCVFS_FRAM) {
1090 lp->mace_stats.fram++;
1091 }
1092 if (rx_status & MACE_RCVFS_FCS) {
1093 lp->mace_stats.fcs++;
1094 }
1095 } else {
1096 short pkt_len = (rx_status & ~MACE_RCVFS_RCVSTS) - 4;
1097 /* Auto Strip is off, always subtract 4 */
1098 struct sk_buff *skb;
1099
1100 lp->mace_stats.rfs_rntpc += inb(ioaddr + AM2150_RCV);
1101 /* runt packet count */
1102 lp->mace_stats.rfs_rcvcc += inb(ioaddr + AM2150_RCV);
1103 /* rcv collision count */
1104
1105 pr_debug(" receiving packet size 0x%X rx_status"
1106 " 0x%X.\n", pkt_len, rx_status);
1107
1108 skb = dev_alloc_skb(pkt_len+2);
1109
1110 if (skb != NULL) {
1111 skb_reserve(skb, 2);
1112 insw(ioaddr + AM2150_RCV, skb_put(skb, pkt_len), pkt_len>>1);
1113 if (pkt_len & 1)
1114 *(skb_tail_pointer(skb) - 1) = inb(ioaddr + AM2150_RCV);
1115 skb->protocol = eth_type_trans(skb, dev);
1116
1117 netif_rx(skb); /* Send the packet to the upper (protocol) layers. */
1118
1119 lp->linux_stats.rx_packets++;
1120 lp->linux_stats.rx_bytes += pkt_len;
1121 outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */
1122 continue;
1123 } else {
1124 pr_debug("%s: couldn't allocate a sk_buff of size"
1125 " %d.\n", dev->name, pkt_len);
1126 lp->linux_stats.rx_dropped++;
1127 }
1128 }
1129 outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */
1130 } /* while */
1131
1132 return 0;
1133 } /* mace_rx */
1134
1135 /* ----------------------------------------------------------------------------
1136 pr_linux_stats
1137 ---------------------------------------------------------------------------- */
1138 static void pr_linux_stats(struct net_device_stats *pstats)
1139 {
1140 pr_debug("pr_linux_stats\n");
1141 pr_debug(" rx_packets=%-7ld tx_packets=%ld\n",
1142 (long)pstats->rx_packets, (long)pstats->tx_packets);
1143 pr_debug(" rx_errors=%-7ld tx_errors=%ld\n",
1144 (long)pstats->rx_errors, (long)pstats->tx_errors);
1145 pr_debug(" rx_dropped=%-7ld tx_dropped=%ld\n",
1146 (long)pstats->rx_dropped, (long)pstats->tx_dropped);
1147 pr_debug(" multicast=%-7ld collisions=%ld\n",
1148 (long)pstats->multicast, (long)pstats->collisions);
1149
1150 pr_debug(" rx_length_errors=%-7ld rx_over_errors=%ld\n",
1151 (long)pstats->rx_length_errors, (long)pstats->rx_over_errors);
1152 pr_debug(" rx_crc_errors=%-7ld rx_frame_errors=%ld\n",
1153 (long)pstats->rx_crc_errors, (long)pstats->rx_frame_errors);
1154 pr_debug(" rx_fifo_errors=%-7ld rx_missed_errors=%ld\n",
1155 (long)pstats->rx_fifo_errors, (long)pstats->rx_missed_errors);
1156
1157 pr_debug(" tx_aborted_errors=%-7ld tx_carrier_errors=%ld\n",
1158 (long)pstats->tx_aborted_errors, (long)pstats->tx_carrier_errors);
1159 pr_debug(" tx_fifo_errors=%-7ld tx_heartbeat_errors=%ld\n",
1160 (long)pstats->tx_fifo_errors, (long)pstats->tx_heartbeat_errors);
1161 pr_debug(" tx_window_errors=%ld\n",
1162 (long)pstats->tx_window_errors);
1163 } /* pr_linux_stats */
1164
1165 /* ----------------------------------------------------------------------------
1166 pr_mace_stats
1167 ---------------------------------------------------------------------------- */
1168 static void pr_mace_stats(mace_statistics *pstats)
1169 {
1170 pr_debug("pr_mace_stats\n");
1171
1172 pr_debug(" xmtsv=%-7d uflo=%d\n",
1173 pstats->xmtsv, pstats->uflo);
1174 pr_debug(" lcol=%-7d more=%d\n",
1175 pstats->lcol, pstats->more);
1176 pr_debug(" one=%-7d defer=%d\n",
1177 pstats->one, pstats->defer);
1178 pr_debug(" lcar=%-7d rtry=%d\n",
1179 pstats->lcar, pstats->rtry);
1180
1181 /* MACE_XMTRC */
1182 pr_debug(" exdef=%-7d xmtrc=%d\n",
1183 pstats->exdef, pstats->xmtrc);
1184
1185 /* RFS1--Receive Status (RCVSTS) */
1186 pr_debug(" oflo=%-7d clsn=%d\n",
1187 pstats->oflo, pstats->clsn);
1188 pr_debug(" fram=%-7d fcs=%d\n",
1189 pstats->fram, pstats->fcs);
1190
1191 /* RFS2--Runt Packet Count (RNTPC) */
1192 /* RFS3--Receive Collision Count (RCVCC) */
1193 pr_debug(" rfs_rntpc=%-7d rfs_rcvcc=%d\n",
1194 pstats->rfs_rntpc, pstats->rfs_rcvcc);
1195
1196 /* MACE_IR */
1197 pr_debug(" jab=%-7d babl=%d\n",
1198 pstats->jab, pstats->babl);
1199 pr_debug(" cerr=%-7d rcvcco=%d\n",
1200 pstats->cerr, pstats->rcvcco);
1201 pr_debug(" rntpco=%-7d mpco=%d\n",
1202 pstats->rntpco, pstats->mpco);
1203
1204 /* MACE_MPC */
1205 pr_debug(" mpc=%d\n", pstats->mpc);
1206
1207 /* MACE_RNTPC */
1208 pr_debug(" rntpc=%d\n", pstats->rntpc);
1209
1210 /* MACE_RCVCC */
1211 pr_debug(" rcvcc=%d\n", pstats->rcvcc);
1212
1213 } /* pr_mace_stats */
1214
1215 /* ----------------------------------------------------------------------------
1216 update_stats
1217 Update statistics. We change to register window 1, so this
1218 should be run single-threaded if the device is active. This is
1219 expected to be a rare operation, and it's simpler for the rest
1220 of the driver to assume that window 0 is always valid rather
1221 than use a special window-state variable.
1222
1223 oflo & uflo should _never_ occur since it would mean the Xilinx
1224 was not able to transfer data between the MACE FIFO and the
1225 card's SRAM fast enough. If this happens, something is
1226 seriously wrong with the hardware.
1227 ---------------------------------------------------------------------------- */
1228 static void update_stats(unsigned int ioaddr, struct net_device *dev)
1229 {
1230 mace_private *lp = netdev_priv(dev);
1231
1232 lp->mace_stats.rcvcc += mace_read(lp, ioaddr, MACE_RCVCC);
1233 lp->mace_stats.rntpc += mace_read(lp, ioaddr, MACE_RNTPC);
1234 lp->mace_stats.mpc += mace_read(lp, ioaddr, MACE_MPC);
1235 /* At this point, mace_stats is fully updated for this call.
1236 We may now update the linux_stats. */
1237
1238 /* The MACE has no equivalent for linux_stats field which are commented
1239 out. */
1240
1241 /* lp->linux_stats.multicast; */
1242 lp->linux_stats.collisions =
1243 lp->mace_stats.rcvcco * 256 + lp->mace_stats.rcvcc;
1244 /* Collision: The MACE may retry sending a packet 15 times
1245 before giving up. The retry count is in XMTRC.
1246 Does each retry constitute a collision?
1247 If so, why doesn't the RCVCC record these collisions? */
1248
1249 /* detailed rx_errors: */
1250 lp->linux_stats.rx_length_errors =
1251 lp->mace_stats.rntpco * 256 + lp->mace_stats.rntpc;
1252 /* lp->linux_stats.rx_over_errors */
1253 lp->linux_stats.rx_crc_errors = lp->mace_stats.fcs;
1254 lp->linux_stats.rx_frame_errors = lp->mace_stats.fram;
1255 lp->linux_stats.rx_fifo_errors = lp->mace_stats.oflo;
1256 lp->linux_stats.rx_missed_errors =
1257 lp->mace_stats.mpco * 256 + lp->mace_stats.mpc;
1258
1259 /* detailed tx_errors */
1260 lp->linux_stats.tx_aborted_errors = lp->mace_stats.rtry;
1261 lp->linux_stats.tx_carrier_errors = lp->mace_stats.lcar;
1262 /* LCAR usually results from bad cabling. */
1263 lp->linux_stats.tx_fifo_errors = lp->mace_stats.uflo;
1264 lp->linux_stats.tx_heartbeat_errors = lp->mace_stats.cerr;
1265 /* lp->linux_stats.tx_window_errors; */
1266 } /* update_stats */
1267
1268 /* ----------------------------------------------------------------------------
1269 mace_get_stats
1270 Gathers ethernet statistics from the MACE chip.
1271 ---------------------------------------------------------------------------- */
1272 static struct net_device_stats *mace_get_stats(struct net_device *dev)
1273 {
1274 mace_private *lp = netdev_priv(dev);
1275
1276 update_stats(dev->base_addr, dev);
1277
1278 pr_debug("%s: updating the statistics.\n", dev->name);
1279 pr_linux_stats(&lp->linux_stats);
1280 pr_mace_stats(&lp->mace_stats);
1281
1282 return &lp->linux_stats;
1283 } /* net_device_stats */
1284
1285 /* ----------------------------------------------------------------------------
1286 updateCRC
1287 Modified from Am79C90 data sheet.
1288 ---------------------------------------------------------------------------- */
1289
1290 #ifdef BROKEN_MULTICAST
1291
1292 static void updateCRC(int *CRC, int bit)
1293 {
1294 static const int poly[]={
1295 1,1,1,0, 1,1,0,1,
1296 1,0,1,1, 1,0,0,0,
1297 1,0,0,0, 0,0,1,1,
1298 0,0,1,0, 0,0,0,0
1299 }; /* CRC polynomial. poly[n] = coefficient of the x**n term of the
1300 CRC generator polynomial. */
1301
1302 int j;
1303
1304 /* shift CRC and control bit (CRC[32]) */
1305 for (j = 32; j > 0; j--)
1306 CRC[j] = CRC[j-1];
1307 CRC[0] = 0;
1308
1309 /* If bit XOR(control bit) = 1, set CRC = CRC XOR polynomial. */
1310 if (bit ^ CRC[32])
1311 for (j = 0; j < 32; j++)
1312 CRC[j] ^= poly[j];
1313 } /* updateCRC */
1314
1315 /* ----------------------------------------------------------------------------
1316 BuildLAF
1317 Build logical address filter.
1318 Modified from Am79C90 data sheet.
1319
1320 Input
1321 ladrf: logical address filter (contents initialized to 0)
1322 adr: ethernet address
1323 ---------------------------------------------------------------------------- */
1324 static void BuildLAF(int *ladrf, int *adr)
1325 {
1326 int CRC[33]={1}; /* CRC register, 1 word/bit + extra control bit */
1327
1328 int i, byte; /* temporary array indices */
1329 int hashcode; /* the output object */
1330
1331 CRC[32]=0;
1332
1333 for (byte = 0; byte < 6; byte++)
1334 for (i = 0; i < 8; i++)
1335 updateCRC(CRC, (adr[byte] >> i) & 1);
1336
1337 hashcode = 0;
1338 for (i = 0; i < 6; i++)
1339 hashcode = (hashcode << 1) + CRC[i];
1340
1341 byte = hashcode >> 3;
1342 ladrf[byte] |= (1 << (hashcode & 7));
1343
1344 #ifdef PCMCIA_DEBUG
1345 if (0)
1346 printk(KERN_DEBUG " adr =%pM\n", adr);
1347 printk(KERN_DEBUG " hashcode = %d(decimal), ladrf[0:63] =", hashcode);
1348 for (i = 0; i < 8; i++)
1349 pr_cont(" %02X", ladrf[i]);
1350 pr_cont("\n");
1351 #endif
1352 } /* BuildLAF */
1353
1354 /* ----------------------------------------------------------------------------
1355 restore_multicast_list
1356 Restores the multicast filter for MACE chip to the last
1357 set_multicast_list() call.
1358
1359 Input
1360 multicast_num_addrs
1361 multicast_ladrf[]
1362 ---------------------------------------------------------------------------- */
1363 static void restore_multicast_list(struct net_device *dev)
1364 {
1365 mace_private *lp = netdev_priv(dev);
1366 int num_addrs = lp->multicast_num_addrs;
1367 int *ladrf = lp->multicast_ladrf;
1368 unsigned int ioaddr = dev->base_addr;
1369 int i;
1370
1371 pr_debug("%s: restoring Rx mode to %d addresses.\n",
1372 dev->name, num_addrs);
1373
1374 if (num_addrs > 0) {
1375
1376 pr_debug("Attempt to restore multicast list detected.\n");
1377
1378 mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_LOGADDR);
1379 /* Poll ADDRCHG bit */
1380 while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG)
1381 ;
1382 /* Set LADRF register */
1383 for (i = 0; i < MACE_LADRF_LEN; i++)
1384 mace_write(lp, ioaddr, MACE_LADRF, ladrf[i]);
1385
1386 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_RCVFCSE | MACE_UTR_LOOP_EXTERNAL);
1387 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1388
1389 } else if (num_addrs < 0) {
1390
1391 /* Promiscuous mode: receive all packets */
1392 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1393 mace_write(lp, ioaddr, MACE_MACCC,
1394 MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV
1395 );
1396
1397 } else {
1398
1399 /* Normal mode */
1400 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1401 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1402
1403 }
1404 } /* restore_multicast_list */
1405
1406 /* ----------------------------------------------------------------------------
1407 set_multicast_list
1408 Set or clear the multicast filter for this adaptor.
1409
1410 Input
1411 num_addrs == -1 Promiscuous mode, receive all packets
1412 num_addrs == 0 Normal mode, clear multicast list
1413 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1414 best-effort filtering.
1415 Output
1416 multicast_num_addrs
1417 multicast_ladrf[]
1418 ---------------------------------------------------------------------------- */
1419
1420 static void set_multicast_list(struct net_device *dev)
1421 {
1422 mace_private *lp = netdev_priv(dev);
1423 int adr[ETHER_ADDR_LEN] = {0}; /* Ethernet address */
1424 struct netdev_hw_addr *ha;
1425
1426 #ifdef PCMCIA_DEBUG
1427 {
1428 static int old;
1429 if (netdev_mc_count(dev) != old) {
1430 old = netdev_mc_count(dev);
1431 pr_debug("%s: setting Rx mode to %d addresses.\n",
1432 dev->name, old);
1433 }
1434 }
1435 #endif
1436
1437 /* Set multicast_num_addrs. */
1438 lp->multicast_num_addrs = netdev_mc_count(dev);
1439
1440 /* Set multicast_ladrf. */
1441 if (num_addrs > 0) {
1442 /* Calculate multicast logical address filter */
1443 memset(lp->multicast_ladrf, 0, MACE_LADRF_LEN);
1444 netdev_for_each_mc_addr(ha, dev) {
1445 memcpy(adr, ha->addr, ETHER_ADDR_LEN);
1446 BuildLAF(lp->multicast_ladrf, adr);
1447 }
1448 }
1449
1450 restore_multicast_list(dev);
1451
1452 } /* set_multicast_list */
1453
1454 #endif /* BROKEN_MULTICAST */
1455
1456 static void restore_multicast_list(struct net_device *dev)
1457 {
1458 unsigned int ioaddr = dev->base_addr;
1459 mace_private *lp = netdev_priv(dev);
1460
1461 pr_debug("%s: restoring Rx mode to %d addresses.\n", dev->name,
1462 lp->multicast_num_addrs);
1463
1464 if (dev->flags & IFF_PROMISC) {
1465 /* Promiscuous mode: receive all packets */
1466 mace_write(lp,ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1467 mace_write(lp, ioaddr, MACE_MACCC,
1468 MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV
1469 );
1470 } else {
1471 /* Normal mode */
1472 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1473 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1474 }
1475 } /* restore_multicast_list */
1476
1477 static void set_multicast_list(struct net_device *dev)
1478 {
1479 mace_private *lp = netdev_priv(dev);
1480
1481 #ifdef PCMCIA_DEBUG
1482 {
1483 static int old;
1484 if (netdev_mc_count(dev) != old) {
1485 old = netdev_mc_count(dev);
1486 pr_debug("%s: setting Rx mode to %d addresses.\n",
1487 dev->name, old);
1488 }
1489 }
1490 #endif
1491
1492 lp->multicast_num_addrs = netdev_mc_count(dev);
1493 restore_multicast_list(dev);
1494
1495 } /* set_multicast_list */
1496
1497 static struct pcmcia_device_id nmclan_ids[] = {
1498 PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "Ethernet", 0x085a850b, 0x00b2e941),
1499 PCMCIA_DEVICE_PROD_ID12("Portable Add-ons", "Ethernet+", 0xebf1d60, 0xad673aaf),
1500 PCMCIA_DEVICE_NULL,
1501 };
1502 MODULE_DEVICE_TABLE(pcmcia, nmclan_ids);
1503
1504 static struct pcmcia_driver nmclan_cs_driver = {
1505 .owner = THIS_MODULE,
1506 .name = "nmclan_cs",
1507 .probe = nmclan_probe,
1508 .remove = nmclan_detach,
1509 .id_table = nmclan_ids,
1510 .suspend = nmclan_suspend,
1511 .resume = nmclan_resume,
1512 };
1513
1514 static int __init init_nmclan_cs(void)
1515 {
1516 return pcmcia_register_driver(&nmclan_cs_driver);
1517 }
1518
1519 static void __exit exit_nmclan_cs(void)
1520 {
1521 pcmcia_unregister_driver(&nmclan_cs_driver);
1522 }
1523
1524 module_init(init_nmclan_cs);
1525 module_exit(exit_nmclan_cs);
Linux kernel - Deliverables
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