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