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