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1/* ----------------------------------------------------------------------------
2Linux 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
9Written 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
16Ported to Linux 1.3.* network driver environment by
17 Matti Aarnio <mea@utu.fi>
18
19References
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-------------------------------------------------------------------------------
48Driver Notes and Issues
49-------------------------------------------------------------------------------
50
511. 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
552. 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
603. If hot extraction does not work for you, use 'ifconfig eth0 down'
61 before extraction.
62
634. There is a bad slow-down problem in this driver.
64
655. Future: Multicast processing. In the meantime, do _not_ compile your
66 kernel with multicast ip enabled.
67
68-------------------------------------------------------------------------------
69History
70-------------------------------------------------------------------------------
71Log: nmclan_cs.c,v
72 * 2.5.75-ac1 2003/07/11 Alan Cox <alan@redhat.com>
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
9695/05/13 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.
10095/05/11 rpao V0.10
101 Multiple transmit request processing.
102 Modified statistics to use MACE counters where possible.
10395/05/10 rpao V0.09 Bug fix: Must use IO_DATA_PATH_WIDTH_AUTO.
104 *Released
10595/05/10 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.
10995/05/10 rpao V0.07 Statistics.
11095/05/09 rpao V0.06 Fix rx_framecnt problem by addition of PCIC wait states.
111
112---------------------------------------------------------------------------- */
113
114#define DRV_NAME "nmclan_cs"
115#define DRV_VERSION "0.16"
116
117
118/* ----------------------------------------------------------------------------
119Conditional Compilation Options
120---------------------------------------------------------------------------- */
121
122#define MULTI_TX 0
123#define RESET_ON_TIMEOUT 1
124#define TX_INTERRUPTABLE 1
125#define RESET_XILINX 0
126
127/* ----------------------------------------------------------------------------
128Include Files
129---------------------------------------------------------------------------- */
130
131#include <linux/module.h>
132#include <linux/kernel.h>
133#include <linux/init.h>
134#include <linux/ptrace.h>
135#include <linux/slab.h>
136#include <linux/string.h>
137#include <linux/timer.h>
138#include <linux/interrupt.h>
139#include <linux/in.h>
140#include <linux/delay.h>
141#include <linux/ethtool.h>
142#include <linux/netdevice.h>
143#include <linux/etherdevice.h>
144#include <linux/skbuff.h>
145#include <linux/if_arp.h>
146#include <linux/ioport.h>
147#include <linux/bitops.h>
148
149#include <pcmcia/cs_types.h>
150#include <pcmcia/cs.h>
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/* ----------------------------------------------------------------------------
160Defines
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/*
181The Am2150 has a Xilinx XC3042 field programmable gate array (FPGA)
182which manages the interface between the MACE and the PCMCIA bus. It
183also includes buffer management for the 32K x 8 SRAM to control up to
184four 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/* ----------------------------------------------------------------------------
316Type Definitions
317---------------------------------------------------------------------------- */
318
319typedef 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
364typedef struct _mace_private {
365 struct pcmcia_device *p_dev;
366 dev_node_t node;
367 struct net_device_stats linux_stats; /* Linux statistics counters */
368 mace_statistics mace_stats; /* MACE chip statistics counters */
369
370 /* restore_multicast_list() state variables */
371 int multicast_ladrf[MACE_LADRF_LEN]; /* Logical address filter */
372 int multicast_num_addrs;
373
374 char tx_free_frames; /* Number of free transmit frame buffers */
375 char tx_irq_disabled; /* MACE TX interrupt disabled */
376
377 spinlock_t bank_lock; /* Must be held if you step off bank 0 */
378} mace_private;
379
380/* ----------------------------------------------------------------------------
381Private Global Variables
382---------------------------------------------------------------------------- */
383
384#ifdef PCMCIA_DEBUG
385static char rcsid[] =
386"nmclan_cs.c,v 0.16 1995/07/01 06:42:17 rpao Exp rpao";
387static char *version =
388DRV_NAME " " DRV_VERSION " (Roger C. Pao)";
389#endif
390
391static const char *if_names[]={
392 "Auto", "10baseT", "BNC",
393};
394
395/* ----------------------------------------------------------------------------
396Parameters
397 These are the parameters that can be set during loading with
398 'insmod'.
399---------------------------------------------------------------------------- */
400
401MODULE_DESCRIPTION("New Media PCMCIA ethernet driver");
402MODULE_LICENSE("GPL");
403
404#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
405
406/* 0=auto, 1=10baseT, 2 = 10base2, default=auto */
407INT_MODULE_PARM(if_port, 0);
408
409#ifdef PCMCIA_DEBUG
410INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
411#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
412#else
413#define DEBUG(n, args...)
414#endif
415
416/* ----------------------------------------------------------------------------
417Function Prototypes
418---------------------------------------------------------------------------- */
419
420static int nmclan_config(struct pcmcia_device *link);
421static void nmclan_release(struct pcmcia_device *link);
422
423static void nmclan_reset(struct net_device *dev);
424static int mace_config(struct net_device *dev, struct ifmap *map);
425static int mace_open(struct net_device *dev);
426static int mace_close(struct net_device *dev);
427static int mace_start_xmit(struct sk_buff *skb, struct net_device *dev);
428static void mace_tx_timeout(struct net_device *dev);
429static irqreturn_t mace_interrupt(int irq, void *dev_id);
430static struct net_device_stats *mace_get_stats(struct net_device *dev);
431static int mace_rx(struct net_device *dev, unsigned char RxCnt);
432static void restore_multicast_list(struct net_device *dev);
433static void set_multicast_list(struct net_device *dev);
434static const struct ethtool_ops netdev_ethtool_ops;
435
436
437static void nmclan_detach(struct pcmcia_device *p_dev);
438
439/* ----------------------------------------------------------------------------
440nmclan_attach
441 Creates an "instance" of the driver, allocating local data
442 structures for one device. The device is registered with Card
443 Services.
444---------------------------------------------------------------------------- */
445
446static int nmclan_probe(struct pcmcia_device *link)
447{
448 mace_private *lp;
449 struct net_device *dev;
450
451 DEBUG(0, "nmclan_attach()\n");
452 DEBUG(1, "%s\n", rcsid);
453
454 /* Create new ethernet device */
455 dev = alloc_etherdev(sizeof(mace_private));
456 if (!dev)
457 return -ENOMEM;
458 lp = netdev_priv(dev);
459 lp->p_dev = link;
460 link->priv = dev;
461
462 spin_lock_init(&lp->bank_lock);
463 link->io.NumPorts1 = 32;
464 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
465 link->io.IOAddrLines = 5;
466 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
467 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
468 link->irq.Handler = &mace_interrupt;
469 link->irq.Instance = dev;
470 link->conf.Attributes = CONF_ENABLE_IRQ;
471 link->conf.IntType = INT_MEMORY_AND_IO;
472 link->conf.ConfigIndex = 1;
473 link->conf.Present = PRESENT_OPTION;
474
475 lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
476
477 dev->hard_start_xmit = &mace_start_xmit;
478 dev->set_config = &mace_config;
479 dev->get_stats = &mace_get_stats;
480 dev->set_multicast_list = &set_multicast_list;
481 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
482 dev->open = &mace_open;
483 dev->stop = &mace_close;
484#ifdef HAVE_TX_TIMEOUT
485 dev->tx_timeout = mace_tx_timeout;
486 dev->watchdog_timeo = TX_TIMEOUT;
487#endif
488
489 return nmclan_config(link);
490} /* nmclan_attach */
491
492/* ----------------------------------------------------------------------------
493nmclan_detach
494 This deletes a driver "instance". The device is de-registered
495 with Card Services. If it has been released, all local data
496 structures are freed. Otherwise, the structures will be freed
497 when the device is released.
498---------------------------------------------------------------------------- */
499
500static void nmclan_detach(struct pcmcia_device *link)
501{
502 struct net_device *dev = link->priv;
503
504 DEBUG(0, "nmclan_detach(0x%p)\n", link);
505
506 if (link->dev_node)
507 unregister_netdev(dev);
508
509 nmclan_release(link);
510
511 free_netdev(dev);
512} /* nmclan_detach */
513
514/* ----------------------------------------------------------------------------
515mace_read
516 Reads a MACE register. This is bank independent; however, the
517 caller must ensure that this call is not interruptable. We are
518 assuming that during normal operation, the MACE is always in
519 bank 0.
520---------------------------------------------------------------------------- */
521static int mace_read(mace_private *lp, kio_addr_t ioaddr, int reg)
522{
523 int data = 0xFF;
524 unsigned long flags;
525
526 switch (reg >> 4) {
527 case 0: /* register 0-15 */
528 data = inb(ioaddr + AM2150_MACE_BASE + reg);
529 break;
530 case 1: /* register 16-31 */
531 spin_lock_irqsave(&lp->bank_lock, flags);
532 MACEBANK(1);
533 data = inb(ioaddr + AM2150_MACE_BASE + (reg & 0x0F));
534 MACEBANK(0);
535 spin_unlock_irqrestore(&lp->bank_lock, flags);
536 break;
537 }
538 return (data & 0xFF);
539} /* mace_read */
540
541/* ----------------------------------------------------------------------------
542mace_write
543 Writes to a MACE register. This is bank independent; however,
544 the caller must ensure that this call is not interruptable. We
545 are assuming that during normal operation, the MACE is always in
546 bank 0.
547---------------------------------------------------------------------------- */
548static void mace_write(mace_private *lp, kio_addr_t ioaddr, int reg, int data)
549{
550 unsigned long flags;
551
552 switch (reg >> 4) {
553 case 0: /* register 0-15 */
554 outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + reg);
555 break;
556 case 1: /* register 16-31 */
557 spin_lock_irqsave(&lp->bank_lock, flags);
558 MACEBANK(1);
559 outb(data & 0xFF, ioaddr + AM2150_MACE_BASE + (reg & 0x0F));
560 MACEBANK(0);
561 spin_unlock_irqrestore(&lp->bank_lock, flags);
562 break;
563 }
564} /* mace_write */
565
566/* ----------------------------------------------------------------------------
567mace_init
568 Resets the MACE chip.
569---------------------------------------------------------------------------- */
570static int mace_init(mace_private *lp, kio_addr_t ioaddr, char *enet_addr)
571{
572 int i;
573 int ct = 0;
574
575 /* MACE Software reset */
576 mace_write(lp, ioaddr, MACE_BIUCC, 1);
577 while (mace_read(lp, ioaddr, MACE_BIUCC) & 0x01) {
578 /* Wait for reset bit to be cleared automatically after <= 200ns */;
579 if(++ct > 500)
580 {
581 printk(KERN_ERR "mace: reset failed, card removed ?\n");
582 return -1;
583 }
584 udelay(1);
585 }
586 mace_write(lp, ioaddr, MACE_BIUCC, 0);
587
588 /* The Am2150 requires that the MACE FIFOs operate in burst mode. */
589 mace_write(lp, ioaddr, MACE_FIFOCC, 0x0F);
590
591 mace_write(lp,ioaddr, MACE_RCVFC, 0); /* Disable Auto Strip Receive */
592 mace_write(lp, ioaddr, MACE_IMR, 0xFF); /* Disable all interrupts until _open */
593
594 /*
595 * Bit 2-1 PORTSEL[1-0] Port Select.
596 * 00 AUI/10Base-2
597 * 01 10Base-T
598 * 10 DAI Port (reserved in Am2150)
599 * 11 GPSI
600 * For this card, only the first two are valid.
601 * So, PLSCC should be set to
602 * 0x00 for 10Base-2
603 * 0x02 for 10Base-T
604 * Or just set ASEL in PHYCC below!
605 */
606 switch (if_port) {
607 case 1:
608 mace_write(lp, ioaddr, MACE_PLSCC, 0x02);
609 break;
610 case 2:
611 mace_write(lp, ioaddr, MACE_PLSCC, 0x00);
612 break;
613 default:
614 mace_write(lp, ioaddr, MACE_PHYCC, /* ASEL */ 4);
615 /* ASEL Auto Select. When set, the PORTSEL[1-0] bits are overridden,
616 and the MACE device will automatically select the operating media
617 interface port. */
618 break;
619 }
620
621 mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_PHYADDR);
622 /* Poll ADDRCHG bit */
623 ct = 0;
624 while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG)
625 {
626 if(++ ct > 500)
627 {
628 printk(KERN_ERR "mace: ADDRCHG timeout, card removed ?\n");
629 return -1;
630 }
631 }
632 /* Set PADR register */
633 for (i = 0; i < ETHER_ADDR_LEN; i++)
634 mace_write(lp, ioaddr, MACE_PADR, enet_addr[i]);
635
636 /* MAC Configuration Control Register should be written last */
637 /* Let set_multicast_list set this. */
638 /* mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV); */
639 mace_write(lp, ioaddr, MACE_MACCC, 0x00);
640 return 0;
641} /* mace_init */
642
643/* ----------------------------------------------------------------------------
644nmclan_config
645 This routine is scheduled to run after a CARD_INSERTION event
646 is received, to configure the PCMCIA socket, and to make the
647 ethernet device available to the system.
648---------------------------------------------------------------------------- */
649
650#define CS_CHECK(fn, ret) \
651 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
652
653static int nmclan_config(struct pcmcia_device *link)
654{
655 struct net_device *dev = link->priv;
656 mace_private *lp = netdev_priv(dev);
657 tuple_t tuple;
658 u_char buf[64];
659 int i, last_ret, last_fn;
660 kio_addr_t ioaddr;
661 DECLARE_MAC_BUF(mac);
662
663 DEBUG(0, "nmclan_config(0x%p)\n", link);
664
665 CS_CHECK(RequestIO, pcmcia_request_io(link, &link->io));
666 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
667 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
668 dev->irq = link->irq.AssignedIRQ;
669 dev->base_addr = link->io.BasePort1;
670
671 ioaddr = dev->base_addr;
672
673 /* Read the ethernet address from the CIS. */
674 tuple.DesiredTuple = 0x80 /* CISTPL_CFTABLE_ENTRY_MISC */;
675 tuple.TupleData = buf;
676 tuple.TupleDataMax = 64;
677 tuple.TupleOffset = 0;
678 tuple.Attributes = 0;
679 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
680 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
681 memcpy(dev->dev_addr, tuple.TupleData, ETHER_ADDR_LEN);
682
683 /* Verify configuration by reading the MACE ID. */
684 {
685 char sig[2];
686
687 sig[0] = mace_read(lp, ioaddr, MACE_CHIPIDL);
688 sig[1] = mace_read(lp, ioaddr, MACE_CHIPIDH);
689 if ((sig[0] == 0x40) && ((sig[1] & 0x0F) == 0x09)) {
690 DEBUG(0, "nmclan_cs configured: mace id=%x %x\n",
691 sig[0], sig[1]);
692 } else {
693 printk(KERN_NOTICE "nmclan_cs: mace id not found: %x %x should"
694 " be 0x40 0x?9\n", sig[0], sig[1]);
695 return -ENODEV;
696 }
697 }
698
699 if(mace_init(lp, ioaddr, dev->dev_addr) == -1)
700 goto failed;
701
702 /* The if_port symbol can be set when the module is loaded */
703 if (if_port <= 2)
704 dev->if_port = if_port;
705 else
706 printk(KERN_NOTICE "nmclan_cs: invalid if_port requested\n");
707
708 link->dev_node = &lp->node;
709 SET_NETDEV_DEV(dev, &handle_to_dev(link));
710
711 i = register_netdev(dev);
712 if (i != 0) {
713 printk(KERN_NOTICE "nmclan_cs: register_netdev() failed\n");
714 link->dev_node = NULL;
715 goto failed;
716 }
717
718 strcpy(lp->node.dev_name, dev->name);
719
720 printk(KERN_INFO "%s: nmclan: port %#3lx, irq %d, %s port,"
721 " hw_addr %s\n",
722 dev->name, dev->base_addr, dev->irq, if_names[dev->if_port],
723 print_mac(mac, dev->dev_addr));
724 return 0;
725
726cs_failed:
727 cs_error(link, last_fn, last_ret);
728failed:
729 nmclan_release(link);
730 return -ENODEV;
731} /* nmclan_config */
732
733/* ----------------------------------------------------------------------------
734nmclan_release
735 After a card is removed, nmclan_release() will unregister the
736 net device, and release the PCMCIA configuration. If the device
737 is still open, this will be postponed until it is closed.
738---------------------------------------------------------------------------- */
739static void nmclan_release(struct pcmcia_device *link)
740{
741 DEBUG(0, "nmclan_release(0x%p)\n", link);
742 pcmcia_disable_device(link);
743}
744
745static int nmclan_suspend(struct pcmcia_device *link)
746{
747 struct net_device *dev = link->priv;
748
749 if (link->open)
750 netif_device_detach(dev);
751
752 return 0;
753}
754
755static int nmclan_resume(struct pcmcia_device *link)
756{
757 struct net_device *dev = link->priv;
758
759 if (link->open) {
760 nmclan_reset(dev);
761 netif_device_attach(dev);
762 }
763
764 return 0;
765}
766
767
768/* ----------------------------------------------------------------------------
769nmclan_reset
770 Reset and restore all of the Xilinx and MACE registers.
771---------------------------------------------------------------------------- */
772static void nmclan_reset(struct net_device *dev)
773{
774 mace_private *lp = netdev_priv(dev);
775
776#if RESET_XILINX
777 struct pcmcia_device *link = &lp->link;
778 conf_reg_t reg;
779 u_long OrigCorValue;
780
781 /* Save original COR value */
782 reg.Function = 0;
783 reg.Action = CS_READ;
784 reg.Offset = CISREG_COR;
785 reg.Value = 0;
786 pcmcia_access_configuration_register(link, ®);
787 OrigCorValue = reg.Value;
788
789 /* Reset Xilinx */
790 reg.Action = CS_WRITE;
791 reg.Offset = CISREG_COR;
792 DEBUG(1, "nmclan_reset: OrigCorValue=0x%lX, resetting...\n",
793 OrigCorValue);
794 reg.Value = COR_SOFT_RESET;
795 pcmcia_access_configuration_register(link, ®);
796 /* Need to wait for 20 ms for PCMCIA to finish reset. */
797
798 /* Restore original COR configuration index */
799 reg.Value = COR_LEVEL_REQ | (OrigCorValue & COR_CONFIG_MASK);
800 pcmcia_access_configuration_register(link, ®);
801 /* Xilinx is now completely reset along with the MACE chip. */
802 lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
803
804#endif /* #if RESET_XILINX */
805
806 /* Xilinx is now completely reset along with the MACE chip. */
807 lp->tx_free_frames=AM2150_MAX_TX_FRAMES;
808
809 /* Reinitialize the MACE chip for operation. */
810 mace_init(lp, dev->base_addr, dev->dev_addr);
811 mace_write(lp, dev->base_addr, MACE_IMR, MACE_IMR_DEFAULT);
812
813 /* Restore the multicast list and enable TX and RX. */
814 restore_multicast_list(dev);
815} /* nmclan_reset */
816
817/* ----------------------------------------------------------------------------
818mace_config
819 [Someone tell me what this is supposed to do? Is if_port a defined
820 standard? If so, there should be defines to indicate 1=10Base-T,
821 2=10Base-2, etc. including limited automatic detection.]
822---------------------------------------------------------------------------- */
823static int mace_config(struct net_device *dev, struct ifmap *map)
824{
825 if ((map->port != (u_char)(-1)) && (map->port != dev->if_port)) {
826 if (map->port <= 2) {
827 dev->if_port = map->port;
828 printk(KERN_INFO "%s: switched to %s port\n", dev->name,
829 if_names[dev->if_port]);
830 } else
831 return -EINVAL;
832 }
833 return 0;
834} /* mace_config */
835
836/* ----------------------------------------------------------------------------
837mace_open
838 Open device driver.
839---------------------------------------------------------------------------- */
840static int mace_open(struct net_device *dev)
841{
842 kio_addr_t ioaddr = dev->base_addr;
843 mace_private *lp = netdev_priv(dev);
844 struct pcmcia_device *link = lp->p_dev;
845
846 if (!pcmcia_dev_present(link))
847 return -ENODEV;
848
849 link->open++;
850
851 MACEBANK(0);
852
853 netif_start_queue(dev);
854 nmclan_reset(dev);
855
856 return 0; /* Always succeed */
857} /* mace_open */
858
859/* ----------------------------------------------------------------------------
860mace_close
861 Closes device driver.
862---------------------------------------------------------------------------- */
863static int mace_close(struct net_device *dev)
864{
865 kio_addr_t ioaddr = dev->base_addr;
866 mace_private *lp = netdev_priv(dev);
867 struct pcmcia_device *link = lp->p_dev;
868
869 DEBUG(2, "%s: shutting down ethercard.\n", dev->name);
870
871 /* Mask off all interrupts from the MACE chip. */
872 outb(0xFF, ioaddr + AM2150_MACE_BASE + MACE_IMR);
873
874 link->open--;
875 netif_stop_queue(dev);
876
877 return 0;
878} /* mace_close */
879
880static void netdev_get_drvinfo(struct net_device *dev,
881 struct ethtool_drvinfo *info)
882{
883 strcpy(info->driver, DRV_NAME);
884 strcpy(info->version, DRV_VERSION);
885 sprintf(info->bus_info, "PCMCIA 0x%lx", dev->base_addr);
886}
887
888#ifdef PCMCIA_DEBUG
889static u32 netdev_get_msglevel(struct net_device *dev)
890{
891 return pc_debug;
892}
893
894static void netdev_set_msglevel(struct net_device *dev, u32 level)
895{
896 pc_debug = level;
897}
898#endif /* PCMCIA_DEBUG */
899
900static const struct ethtool_ops netdev_ethtool_ops = {
901 .get_drvinfo = netdev_get_drvinfo,
902#ifdef PCMCIA_DEBUG
903 .get_msglevel = netdev_get_msglevel,
904 .set_msglevel = netdev_set_msglevel,
905#endif /* PCMCIA_DEBUG */
906};
907
908/* ----------------------------------------------------------------------------
909mace_start_xmit
910 This routine begins the packet transmit function. When completed,
911 it will generate a transmit interrupt.
912
913 According to /usr/src/linux/net/inet/dev.c, if _start_xmit
914 returns 0, the "packet is now solely the responsibility of the
915 driver." If _start_xmit returns non-zero, the "transmission
916 failed, put skb back into a list."
917---------------------------------------------------------------------------- */
918
919static void mace_tx_timeout(struct net_device *dev)
920{
921 mace_private *lp = netdev_priv(dev);
922 struct pcmcia_device *link = lp->p_dev;
923
924 printk(KERN_NOTICE "%s: transmit timed out -- ", dev->name);
925#if RESET_ON_TIMEOUT
926 printk("resetting card\n");
927 pcmcia_reset_card(link, NULL);
928#else /* #if RESET_ON_TIMEOUT */
929 printk("NOT resetting card\n");
930#endif /* #if RESET_ON_TIMEOUT */
931 dev->trans_start = jiffies;
932 netif_wake_queue(dev);
933}
934
935static int mace_start_xmit(struct sk_buff *skb, struct net_device *dev)
936{
937 mace_private *lp = netdev_priv(dev);
938 kio_addr_t ioaddr = dev->base_addr;
939
940 netif_stop_queue(dev);
941
942 DEBUG(3, "%s: mace_start_xmit(length = %ld) called.\n",
943 dev->name, (long)skb->len);
944
945#if (!TX_INTERRUPTABLE)
946 /* Disable MACE TX interrupts. */
947 outb(MACE_IMR_DEFAULT | MACE_IR_XMTINT,
948 ioaddr + AM2150_MACE_BASE + MACE_IMR);
949 lp->tx_irq_disabled=1;
950#endif /* #if (!TX_INTERRUPTABLE) */
951
952 {
953 /* This block must not be interrupted by another transmit request!
954 mace_tx_timeout will take care of timer-based retransmissions from
955 the upper layers. The interrupt handler is guaranteed never to
956 service a transmit interrupt while we are in here.
957 */
958
959 lp->linux_stats.tx_bytes += skb->len;
960 lp->tx_free_frames--;
961
962 /* WARNING: Write the _exact_ number of bytes written in the header! */
963 /* Put out the word header [must be an outw()] . . . */
964 outw(skb->len, ioaddr + AM2150_XMT);
965 /* . . . and the packet [may be any combination of outw() and outb()] */
966 outsw(ioaddr + AM2150_XMT, skb->data, skb->len >> 1);
967 if (skb->len & 1) {
968 /* Odd byte transfer */
969 outb(skb->data[skb->len-1], ioaddr + AM2150_XMT);
970 }
971
972 dev->trans_start = jiffies;
973
974#if MULTI_TX
975 if (lp->tx_free_frames > 0)
976 netif_start_queue(dev);
977#endif /* #if MULTI_TX */
978 }
979
980#if (!TX_INTERRUPTABLE)
981 /* Re-enable MACE TX interrupts. */
982 lp->tx_irq_disabled=0;
983 outb(MACE_IMR_DEFAULT, ioaddr + AM2150_MACE_BASE + MACE_IMR);
984#endif /* #if (!TX_INTERRUPTABLE) */
985
986 dev_kfree_skb(skb);
987
988 return 0;
989} /* mace_start_xmit */
990
991/* ----------------------------------------------------------------------------
992mace_interrupt
993 The interrupt handler.
994---------------------------------------------------------------------------- */
995static irqreturn_t mace_interrupt(int irq, void *dev_id)
996{
997 struct net_device *dev = (struct net_device *) dev_id;
998 mace_private *lp = netdev_priv(dev);
999 kio_addr_t ioaddr;
1000 int status;
1001 int IntrCnt = MACE_MAX_IR_ITERATIONS;
1002
1003 if (dev == NULL) {
1004 DEBUG(2, "mace_interrupt(): irq 0x%X for unknown device.\n",
1005 irq);
1006 return IRQ_NONE;
1007 }
1008
1009 ioaddr = dev->base_addr;
1010
1011 if (lp->tx_irq_disabled) {
1012 printk(
1013 (lp->tx_irq_disabled?
1014 KERN_NOTICE "%s: Interrupt with tx_irq_disabled "
1015 "[isr=%02X, imr=%02X]\n":
1016 KERN_NOTICE "%s: Re-entering the interrupt handler "
1017 "[isr=%02X, imr=%02X]\n"),
1018 dev->name,
1019 inb(ioaddr + AM2150_MACE_BASE + MACE_IR),
1020 inb(ioaddr + AM2150_MACE_BASE + MACE_IMR)
1021 );
1022 /* WARNING: MACE_IR has been read! */
1023 return IRQ_NONE;
1024 }
1025
1026 if (!netif_device_present(dev)) {
1027 DEBUG(2, "%s: interrupt from dead card\n", dev->name);
1028 return IRQ_NONE;
1029 }
1030
1031 do {
1032 /* WARNING: MACE_IR is a READ/CLEAR port! */
1033 status = inb(ioaddr + AM2150_MACE_BASE + MACE_IR);
1034
1035 DEBUG(3, "mace_interrupt: irq 0x%X status 0x%X.\n", irq, status);
1036
1037 if (status & MACE_IR_RCVINT) {
1038 mace_rx(dev, MACE_MAX_RX_ITERATIONS);
1039 }
1040
1041 if (status & MACE_IR_XMTINT) {
1042 unsigned char fifofc;
1043 unsigned char xmtrc;
1044 unsigned char xmtfs;
1045
1046 fifofc = inb(ioaddr + AM2150_MACE_BASE + MACE_FIFOFC);
1047 if ((fifofc & MACE_FIFOFC_XMTFC)==0) {
1048 lp->linux_stats.tx_errors++;
1049 outb(0xFF, ioaddr + AM2150_XMT_SKIP);
1050 }
1051
1052 /* Transmit Retry Count (XMTRC, reg 4) */
1053 xmtrc = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTRC);
1054 if (xmtrc & MACE_XMTRC_EXDEF) lp->mace_stats.exdef++;
1055 lp->mace_stats.xmtrc += (xmtrc & MACE_XMTRC_XMTRC);
1056
1057 if (
1058 (xmtfs = inb(ioaddr + AM2150_MACE_BASE + MACE_XMTFS)) &
1059 MACE_XMTFS_XMTSV /* Transmit Status Valid */
1060 ) {
1061 lp->mace_stats.xmtsv++;
1062
1063 if (xmtfs & ~MACE_XMTFS_XMTSV) {
1064 if (xmtfs & MACE_XMTFS_UFLO) {
1065 /* Underflow. Indicates that the Transmit FIFO emptied before
1066 the end of frame was reached. */
1067 lp->mace_stats.uflo++;
1068 }
1069 if (xmtfs & MACE_XMTFS_LCOL) {
1070 /* Late Collision */
1071 lp->mace_stats.lcol++;
1072 }
1073 if (xmtfs & MACE_XMTFS_MORE) {
1074 /* MORE than one retry was needed */
1075 lp->mace_stats.more++;
1076 }
1077 if (xmtfs & MACE_XMTFS_ONE) {
1078 /* Exactly ONE retry occurred */
1079 lp->mace_stats.one++;
1080 }
1081 if (xmtfs & MACE_XMTFS_DEFER) {
1082 /* Transmission was defered */
1083 lp->mace_stats.defer++;
1084 }
1085 if (xmtfs & MACE_XMTFS_LCAR) {
1086 /* Loss of carrier */
1087 lp->mace_stats.lcar++;
1088 }
1089 if (xmtfs & MACE_XMTFS_RTRY) {
1090 /* Retry error: transmit aborted after 16 attempts */
1091 lp->mace_stats.rtry++;
1092 }
1093 } /* if (xmtfs & ~MACE_XMTFS_XMTSV) */
1094
1095 } /* if (xmtfs & MACE_XMTFS_XMTSV) */
1096
1097 lp->linux_stats.tx_packets++;
1098 lp->tx_free_frames++;
1099 netif_wake_queue(dev);
1100 } /* if (status & MACE_IR_XMTINT) */
1101
1102 if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) {
1103 if (status & MACE_IR_JAB) {
1104 /* Jabber Error. Excessive transmit duration (20-150ms). */
1105 lp->mace_stats.jab++;
1106 }
1107 if (status & MACE_IR_BABL) {
1108 /* Babble Error. >1518 bytes transmitted. */
1109 lp->mace_stats.babl++;
1110 }
1111 if (status & MACE_IR_CERR) {
1112 /* Collision Error. CERR indicates the absence of the
1113 Signal Quality Error Test message after a packet
1114 transmission. */
1115 lp->mace_stats.cerr++;
1116 }
1117 if (status & MACE_IR_RCVCCO) {
1118 /* Receive Collision Count Overflow; */
1119 lp->mace_stats.rcvcco++;
1120 }
1121 if (status & MACE_IR_RNTPCO) {
1122 /* Runt Packet Count Overflow */
1123 lp->mace_stats.rntpco++;
1124 }
1125 if (status & MACE_IR_MPCO) {
1126 /* Missed Packet Count Overflow */
1127 lp->mace_stats.mpco++;
1128 }
1129 } /* if (status & ~MACE_IMR_DEFAULT & ~MACE_IR_RCVINT & ~MACE_IR_XMTINT) */
1130
1131 } while ((status & ~MACE_IMR_DEFAULT) && (--IntrCnt));
1132
1133 return IRQ_HANDLED;
1134} /* mace_interrupt */
1135
1136/* ----------------------------------------------------------------------------
1137mace_rx
1138 Receives packets.
1139---------------------------------------------------------------------------- */
1140static int mace_rx(struct net_device *dev, unsigned char RxCnt)
1141{
1142 mace_private *lp = netdev_priv(dev);
1143 kio_addr_t ioaddr = dev->base_addr;
1144 unsigned char rx_framecnt;
1145 unsigned short rx_status;
1146
1147 while (
1148 ((rx_framecnt = inb(ioaddr + AM2150_RCV_FRAME_COUNT)) > 0) &&
1149 (rx_framecnt <= 12) && /* rx_framecnt==0xFF if card is extracted. */
1150 (RxCnt--)
1151 ) {
1152 rx_status = inw(ioaddr + AM2150_RCV);
1153
1154 DEBUG(3, "%s: in mace_rx(), framecnt 0x%X, rx_status"
1155 " 0x%X.\n", dev->name, rx_framecnt, rx_status);
1156
1157 if (rx_status & MACE_RCVFS_RCVSTS) { /* Error, update stats. */
1158 lp->linux_stats.rx_errors++;
1159 if (rx_status & MACE_RCVFS_OFLO) {
1160 lp->mace_stats.oflo++;
1161 }
1162 if (rx_status & MACE_RCVFS_CLSN) {
1163 lp->mace_stats.clsn++;
1164 }
1165 if (rx_status & MACE_RCVFS_FRAM) {
1166 lp->mace_stats.fram++;
1167 }
1168 if (rx_status & MACE_RCVFS_FCS) {
1169 lp->mace_stats.fcs++;
1170 }
1171 } else {
1172 short pkt_len = (rx_status & ~MACE_RCVFS_RCVSTS) - 4;
1173 /* Auto Strip is off, always subtract 4 */
1174 struct sk_buff *skb;
1175
1176 lp->mace_stats.rfs_rntpc += inb(ioaddr + AM2150_RCV);
1177 /* runt packet count */
1178 lp->mace_stats.rfs_rcvcc += inb(ioaddr + AM2150_RCV);
1179 /* rcv collision count */
1180
1181 DEBUG(3, " receiving packet size 0x%X rx_status"
1182 " 0x%X.\n", pkt_len, rx_status);
1183
1184 skb = dev_alloc_skb(pkt_len+2);
1185
1186 if (skb != NULL) {
1187 skb_reserve(skb, 2);
1188 insw(ioaddr + AM2150_RCV, skb_put(skb, pkt_len), pkt_len>>1);
1189 if (pkt_len & 1)
1190 *(skb_tail_pointer(skb) - 1) = inb(ioaddr + AM2150_RCV);
1191 skb->protocol = eth_type_trans(skb, dev);
1192
1193 netif_rx(skb); /* Send the packet to the upper (protocol) layers. */
1194
1195 dev->last_rx = jiffies;
1196 lp->linux_stats.rx_packets++;
1197 lp->linux_stats.rx_bytes += pkt_len;
1198 outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */
1199 continue;
1200 } else {
1201 DEBUG(1, "%s: couldn't allocate a sk_buff of size"
1202 " %d.\n", dev->name, pkt_len);
1203 lp->linux_stats.rx_dropped++;
1204 }
1205 }
1206 outb(0xFF, ioaddr + AM2150_RCV_NEXT); /* skip to next frame */
1207 } /* while */
1208
1209 return 0;
1210} /* mace_rx */
1211
1212/* ----------------------------------------------------------------------------
1213pr_linux_stats
1214---------------------------------------------------------------------------- */
1215static void pr_linux_stats(struct net_device_stats *pstats)
1216{
1217 DEBUG(2, "pr_linux_stats\n");
1218 DEBUG(2, " rx_packets=%-7ld tx_packets=%ld\n",
1219 (long)pstats->rx_packets, (long)pstats->tx_packets);
1220 DEBUG(2, " rx_errors=%-7ld tx_errors=%ld\n",
1221 (long)pstats->rx_errors, (long)pstats->tx_errors);
1222 DEBUG(2, " rx_dropped=%-7ld tx_dropped=%ld\n",
1223 (long)pstats->rx_dropped, (long)pstats->tx_dropped);
1224 DEBUG(2, " multicast=%-7ld collisions=%ld\n",
1225 (long)pstats->multicast, (long)pstats->collisions);
1226
1227 DEBUG(2, " rx_length_errors=%-7ld rx_over_errors=%ld\n",
1228 (long)pstats->rx_length_errors, (long)pstats->rx_over_errors);
1229 DEBUG(2, " rx_crc_errors=%-7ld rx_frame_errors=%ld\n",
1230 (long)pstats->rx_crc_errors, (long)pstats->rx_frame_errors);
1231 DEBUG(2, " rx_fifo_errors=%-7ld rx_missed_errors=%ld\n",
1232 (long)pstats->rx_fifo_errors, (long)pstats->rx_missed_errors);
1233
1234 DEBUG(2, " tx_aborted_errors=%-7ld tx_carrier_errors=%ld\n",
1235 (long)pstats->tx_aborted_errors, (long)pstats->tx_carrier_errors);
1236 DEBUG(2, " tx_fifo_errors=%-7ld tx_heartbeat_errors=%ld\n",
1237 (long)pstats->tx_fifo_errors, (long)pstats->tx_heartbeat_errors);
1238 DEBUG(2, " tx_window_errors=%ld\n",
1239 (long)pstats->tx_window_errors);
1240} /* pr_linux_stats */
1241
1242/* ----------------------------------------------------------------------------
1243pr_mace_stats
1244---------------------------------------------------------------------------- */
1245static void pr_mace_stats(mace_statistics *pstats)
1246{
1247 DEBUG(2, "pr_mace_stats\n");
1248
1249 DEBUG(2, " xmtsv=%-7d uflo=%d\n",
1250 pstats->xmtsv, pstats->uflo);
1251 DEBUG(2, " lcol=%-7d more=%d\n",
1252 pstats->lcol, pstats->more);
1253 DEBUG(2, " one=%-7d defer=%d\n",
1254 pstats->one, pstats->defer);
1255 DEBUG(2, " lcar=%-7d rtry=%d\n",
1256 pstats->lcar, pstats->rtry);
1257
1258 /* MACE_XMTRC */
1259 DEBUG(2, " exdef=%-7d xmtrc=%d\n",
1260 pstats->exdef, pstats->xmtrc);
1261
1262 /* RFS1--Receive Status (RCVSTS) */
1263 DEBUG(2, " oflo=%-7d clsn=%d\n",
1264 pstats->oflo, pstats->clsn);
1265 DEBUG(2, " fram=%-7d fcs=%d\n",
1266 pstats->fram, pstats->fcs);
1267
1268 /* RFS2--Runt Packet Count (RNTPC) */
1269 /* RFS3--Receive Collision Count (RCVCC) */
1270 DEBUG(2, " rfs_rntpc=%-7d rfs_rcvcc=%d\n",
1271 pstats->rfs_rntpc, pstats->rfs_rcvcc);
1272
1273 /* MACE_IR */
1274 DEBUG(2, " jab=%-7d babl=%d\n",
1275 pstats->jab, pstats->babl);
1276 DEBUG(2, " cerr=%-7d rcvcco=%d\n",
1277 pstats->cerr, pstats->rcvcco);
1278 DEBUG(2, " rntpco=%-7d mpco=%d\n",
1279 pstats->rntpco, pstats->mpco);
1280
1281 /* MACE_MPC */
1282 DEBUG(2, " mpc=%d\n", pstats->mpc);
1283
1284 /* MACE_RNTPC */
1285 DEBUG(2, " rntpc=%d\n", pstats->rntpc);
1286
1287 /* MACE_RCVCC */
1288 DEBUG(2, " rcvcc=%d\n", pstats->rcvcc);
1289
1290} /* pr_mace_stats */
1291
1292/* ----------------------------------------------------------------------------
1293update_stats
1294 Update statistics. We change to register window 1, so this
1295 should be run single-threaded if the device is active. This is
1296 expected to be a rare operation, and it's simpler for the rest
1297 of the driver to assume that window 0 is always valid rather
1298 than use a special window-state variable.
1299
1300 oflo & uflo should _never_ occur since it would mean the Xilinx
1301 was not able to transfer data between the MACE FIFO and the
1302 card's SRAM fast enough. If this happens, something is
1303 seriously wrong with the hardware.
1304---------------------------------------------------------------------------- */
1305static void update_stats(kio_addr_t ioaddr, struct net_device *dev)
1306{
1307 mace_private *lp = netdev_priv(dev);
1308
1309 lp->mace_stats.rcvcc += mace_read(lp, ioaddr, MACE_RCVCC);
1310 lp->mace_stats.rntpc += mace_read(lp, ioaddr, MACE_RNTPC);
1311 lp->mace_stats.mpc += mace_read(lp, ioaddr, MACE_MPC);
1312 /* At this point, mace_stats is fully updated for this call.
1313 We may now update the linux_stats. */
1314
1315 /* The MACE has no equivalent for linux_stats field which are commented
1316 out. */
1317
1318 /* lp->linux_stats.multicast; */
1319 lp->linux_stats.collisions =
1320 lp->mace_stats.rcvcco * 256 + lp->mace_stats.rcvcc;
1321 /* Collision: The MACE may retry sending a packet 15 times
1322 before giving up. The retry count is in XMTRC.
1323 Does each retry constitute a collision?
1324 If so, why doesn't the RCVCC record these collisions? */
1325
1326 /* detailed rx_errors: */
1327 lp->linux_stats.rx_length_errors =
1328 lp->mace_stats.rntpco * 256 + lp->mace_stats.rntpc;
1329 /* lp->linux_stats.rx_over_errors */
1330 lp->linux_stats.rx_crc_errors = lp->mace_stats.fcs;
1331 lp->linux_stats.rx_frame_errors = lp->mace_stats.fram;
1332 lp->linux_stats.rx_fifo_errors = lp->mace_stats.oflo;
1333 lp->linux_stats.rx_missed_errors =
1334 lp->mace_stats.mpco * 256 + lp->mace_stats.mpc;
1335
1336 /* detailed tx_errors */
1337 lp->linux_stats.tx_aborted_errors = lp->mace_stats.rtry;
1338 lp->linux_stats.tx_carrier_errors = lp->mace_stats.lcar;
1339 /* LCAR usually results from bad cabling. */
1340 lp->linux_stats.tx_fifo_errors = lp->mace_stats.uflo;
1341 lp->linux_stats.tx_heartbeat_errors = lp->mace_stats.cerr;
1342 /* lp->linux_stats.tx_window_errors; */
1343
1344 return;
1345} /* update_stats */
1346
1347/* ----------------------------------------------------------------------------
1348mace_get_stats
1349 Gathers ethernet statistics from the MACE chip.
1350---------------------------------------------------------------------------- */
1351static struct net_device_stats *mace_get_stats(struct net_device *dev)
1352{
1353 mace_private *lp = netdev_priv(dev);
1354
1355 update_stats(dev->base_addr, dev);
1356
1357 DEBUG(1, "%s: updating the statistics.\n", dev->name);
1358 pr_linux_stats(&lp->linux_stats);
1359 pr_mace_stats(&lp->mace_stats);
1360
1361 return &lp->linux_stats;
1362} /* net_device_stats */
1363
1364/* ----------------------------------------------------------------------------
1365updateCRC
1366 Modified from Am79C90 data sheet.
1367---------------------------------------------------------------------------- */
1368
1369#ifdef BROKEN_MULTICAST
1370
1371static void updateCRC(int *CRC, int bit)
1372{
1373 int poly[]={
1374 1,1,1,0, 1,1,0,1,
1375 1,0,1,1, 1,0,0,0,
1376 1,0,0,0, 0,0,1,1,
1377 0,0,1,0, 0,0,0,0
1378 }; /* CRC polynomial. poly[n] = coefficient of the x**n term of the
1379 CRC generator polynomial. */
1380
1381 int j;
1382
1383 /* shift CRC and control bit (CRC[32]) */
1384 for (j = 32; j > 0; j--)
1385 CRC[j] = CRC[j-1];
1386 CRC[0] = 0;
1387
1388 /* If bit XOR(control bit) = 1, set CRC = CRC XOR polynomial. */
1389 if (bit ^ CRC[32])
1390 for (j = 0; j < 32; j++)
1391 CRC[j] ^= poly[j];
1392} /* updateCRC */
1393
1394/* ----------------------------------------------------------------------------
1395BuildLAF
1396 Build logical address filter.
1397 Modified from Am79C90 data sheet.
1398
1399Input
1400 ladrf: logical address filter (contents initialized to 0)
1401 adr: ethernet address
1402---------------------------------------------------------------------------- */
1403static void BuildLAF(int *ladrf, int *adr)
1404{
1405 int CRC[33]={1}; /* CRC register, 1 word/bit + extra control bit */
1406
1407 int i, byte; /* temporary array indices */
1408 int hashcode; /* the output object */
1409
1410 CRC[32]=0;
1411
1412 for (byte = 0; byte < 6; byte++)
1413 for (i = 0; i < 8; i++)
1414 updateCRC(CRC, (adr[byte] >> i) & 1);
1415
1416 hashcode = 0;
1417 for (i = 0; i < 6; i++)
1418 hashcode = (hashcode << 1) + CRC[i];
1419
1420 byte = hashcode >> 3;
1421 ladrf[byte] |= (1 << (hashcode & 7));
1422
1423#ifdef PCMCIA_DEBUG
1424 if (pc_debug > 2) {
1425 printk(KERN_DEBUG " adr =");
1426 for (i = 0; i < 6; i++)
1427 printk(" %02X", adr[i]);
1428 printk("\n" KERN_DEBUG " hashcode = %d(decimal), ladrf[0:63]"
1429 " =", hashcode);
1430 for (i = 0; i < 8; i++)
1431 printk(" %02X", ladrf[i]);
1432 printk("\n");
1433 }
1434#endif
1435} /* BuildLAF */
1436
1437/* ----------------------------------------------------------------------------
1438restore_multicast_list
1439 Restores the multicast filter for MACE chip to the last
1440 set_multicast_list() call.
1441
1442Input
1443 multicast_num_addrs
1444 multicast_ladrf[]
1445---------------------------------------------------------------------------- */
1446static void restore_multicast_list(struct net_device *dev)
1447{
1448 mace_private *lp = netdev_priv(dev);
1449 int num_addrs = lp->multicast_num_addrs;
1450 int *ladrf = lp->multicast_ladrf;
1451 kio_addr_t ioaddr = dev->base_addr;
1452 int i;
1453
1454 DEBUG(2, "%s: restoring Rx mode to %d addresses.\n",
1455 dev->name, num_addrs);
1456
1457 if (num_addrs > 0) {
1458
1459 DEBUG(1, "Attempt to restore multicast list detected.\n");
1460
1461 mace_write(lp, ioaddr, MACE_IAC, MACE_IAC_ADDRCHG | MACE_IAC_LOGADDR);
1462 /* Poll ADDRCHG bit */
1463 while (mace_read(lp, ioaddr, MACE_IAC) & MACE_IAC_ADDRCHG)
1464 ;
1465 /* Set LADRF register */
1466 for (i = 0; i < MACE_LADRF_LEN; i++)
1467 mace_write(lp, ioaddr, MACE_LADRF, ladrf[i]);
1468
1469 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_RCVFCSE | MACE_UTR_LOOP_EXTERNAL);
1470 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1471
1472 } else if (num_addrs < 0) {
1473
1474 /* Promiscuous mode: receive all packets */
1475 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1476 mace_write(lp, ioaddr, MACE_MACCC,
1477 MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV
1478 );
1479
1480 } else {
1481
1482 /* Normal mode */
1483 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1484 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1485
1486 }
1487} /* restore_multicast_list */
1488
1489/* ----------------------------------------------------------------------------
1490set_multicast_list
1491 Set or clear the multicast filter for this adaptor.
1492
1493Input
1494 num_addrs == -1 Promiscuous mode, receive all packets
1495 num_addrs == 0 Normal mode, clear multicast list
1496 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1497 best-effort filtering.
1498Output
1499 multicast_num_addrs
1500 multicast_ladrf[]
1501---------------------------------------------------------------------------- */
1502
1503static void set_multicast_list(struct net_device *dev)
1504{
1505 mace_private *lp = netdev_priv(dev);
1506 int adr[ETHER_ADDR_LEN] = {0}; /* Ethernet address */
1507 int i;
1508 struct dev_mc_list *dmi = dev->mc_list;
1509
1510#ifdef PCMCIA_DEBUG
1511 if (pc_debug > 1) {
1512 static int old;
1513 if (dev->mc_count != old) {
1514 old = dev->mc_count;
1515 DEBUG(0, "%s: setting Rx mode to %d addresses.\n",
1516 dev->name, old);
1517 }
1518 }
1519#endif
1520
1521 /* Set multicast_num_addrs. */
1522 lp->multicast_num_addrs = dev->mc_count;
1523
1524 /* Set multicast_ladrf. */
1525 if (num_addrs > 0) {
1526 /* Calculate multicast logical address filter */
1527 memset(lp->multicast_ladrf, 0, MACE_LADRF_LEN);
1528 for (i = 0; i < dev->mc_count; i++) {
1529 memcpy(adr, dmi->dmi_addr, ETHER_ADDR_LEN);
1530 dmi = dmi->next;
1531 BuildLAF(lp->multicast_ladrf, adr);
1532 }
1533 }
1534
1535 restore_multicast_list(dev);
1536
1537} /* set_multicast_list */
1538
1539#endif /* BROKEN_MULTICAST */
1540
1541static void restore_multicast_list(struct net_device *dev)
1542{
1543 kio_addr_t ioaddr = dev->base_addr;
1544 mace_private *lp = netdev_priv(dev);
1545
1546 DEBUG(2, "%s: restoring Rx mode to %d addresses.\n", dev->name,
1547 lp->multicast_num_addrs);
1548
1549 if (dev->flags & IFF_PROMISC) {
1550 /* Promiscuous mode: receive all packets */
1551 mace_write(lp,ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1552 mace_write(lp, ioaddr, MACE_MACCC,
1553 MACE_MACCC_PROM | MACE_MACCC_ENXMT | MACE_MACCC_ENRCV
1554 );
1555 } else {
1556 /* Normal mode */
1557 mace_write(lp, ioaddr, MACE_UTR, MACE_UTR_LOOP_EXTERNAL);
1558 mace_write(lp, ioaddr, MACE_MACCC, MACE_MACCC_ENXMT | MACE_MACCC_ENRCV);
1559 }
1560} /* restore_multicast_list */
1561
1562static void set_multicast_list(struct net_device *dev)
1563{
1564 mace_private *lp = netdev_priv(dev);
1565
1566#ifdef PCMCIA_DEBUG
1567 if (pc_debug > 1) {
1568 static int old;
1569 if (dev->mc_count != old) {
1570 old = dev->mc_count;
1571 DEBUG(0, "%s: setting Rx mode to %d addresses.\n",
1572 dev->name, old);
1573 }
1574 }
1575#endif
1576
1577 lp->multicast_num_addrs = dev->mc_count;
1578 restore_multicast_list(dev);
1579
1580} /* set_multicast_list */
1581
1582static struct pcmcia_device_id nmclan_ids[] = {
1583 PCMCIA_DEVICE_PROD_ID12("New Media Corporation", "Ethernet", 0x085a850b, 0x00b2e941),
1584 PCMCIA_DEVICE_PROD_ID12("Portable Add-ons", "Ethernet+", 0xebf1d60, 0xad673aaf),
1585 PCMCIA_DEVICE_NULL,
1586};
1587MODULE_DEVICE_TABLE(pcmcia, nmclan_ids);
1588
1589static struct pcmcia_driver nmclan_cs_driver = {
1590 .owner = THIS_MODULE,
1591 .drv = {
1592 .name = "nmclan_cs",
1593 },
1594 .probe = nmclan_probe,
1595 .remove = nmclan_detach,
1596 .id_table = nmclan_ids,
1597 .suspend = nmclan_suspend,
1598 .resume = nmclan_resume,
1599};
1600
1601static int __init init_nmclan_cs(void)
1602{
1603 return pcmcia_register_driver(&nmclan_cs_driver);
1604}
1605
1606static void __exit exit_nmclan_cs(void)
1607{
1608 pcmcia_unregister_driver(&nmclan_cs_driver);
1609}
1610
1611module_init(init_nmclan_cs);
1612module_exit(exit_nmclan_cs);