31c41af2246d6cb4c5926ac7f7cec43b4e71c273
[linux-2.6.git] / drivers / net / wan / sdla.c
1 /*
2  * SDLA         An implementation of a driver for the Sangoma S502/S508 series
3  *              multi-protocol PC interface card.  Initial offering is with 
4  *              the DLCI driver, providing Frame Relay support for linux.
5  *
6  *              Global definitions for the Frame relay interface.
7  *
8  * Version:     @(#)sdla.c   0.30       12 Sep 1996
9  *
10  * Credits:     Sangoma Technologies, for the use of 2 cards for an extended
11  *                      period of time.
12  *              David Mandelstam <dm@sangoma.com> for getting me started on 
13  *                      this project, and incentive to complete it.
14  *              Gene Kozen <74604.152@compuserve.com> for providing me with
15  *                      important information about the cards.
16  *
17  * Author:      Mike McLagan <mike.mclagan@linux.org>
18  *
19  * Changes:
20  *              0.15    Mike McLagan    Improved error handling, packet dropping
21  *              0.20    Mike McLagan    New transmit/receive flags for config
22  *                                      If in FR mode, don't accept packets from
23  *                                      non DLCI devices.
24  *              0.25    Mike McLagan    Fixed problem with rejecting packets
25  *                                      from non DLCI devices.
26  *              0.30    Mike McLagan    Fixed kernel panic when used with modified
27  *                                      ifconfig
28  *
29  *              This program is free software; you can redistribute it and/or
30  *              modify it under the terms of the GNU General Public License
31  *              as published by the Free Software Foundation; either version
32  *              2 of the License, or (at your option) any later version.
33  */
34
35 #include <linux/module.h>
36 #include <linux/kernel.h>
37 #include <linux/types.h>
38 #include <linux/fcntl.h>
39 #include <linux/interrupt.h>
40 #include <linux/ptrace.h>
41 #include <linux/ioport.h>
42 #include <linux/in.h>
43 #include <linux/slab.h>
44 #include <linux/string.h>
45 #include <linux/timer.h>
46 #include <linux/errno.h>
47 #include <linux/init.h>
48 #include <linux/netdevice.h>
49 #include <linux/skbuff.h>
50 #include <linux/if_arp.h>
51 #include <linux/if_frad.h>
52 #include <linux/sdla.h>
53 #include <linux/bitops.h>
54
55 #include <asm/system.h>
56 #include <asm/io.h>
57 #include <asm/dma.h>
58 #include <asm/uaccess.h>
59
60 static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
61
62 static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
63
64 static unsigned int valid_mem[] = {
65                                     0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000, 
66                                     0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
67                                     0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
68                                     0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
69                                     0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000}; 
70
71 static DEFINE_SPINLOCK(sdla_lock);
72
73 /*********************************************************
74  *
75  * these are the core routines that access the card itself 
76  *
77  *********************************************************/
78
79 #define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
80
81 static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
82 {
83         char          *temp;
84         const void    *base;
85         int           offset, bytes;
86
87         temp = buf;
88         while(len)
89         {       
90                 offset = addr & SDLA_ADDR_MASK;
91                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
92                 base = (const void *) (dev->mem_start + offset);
93
94                 SDLA_WINDOW(dev, addr);
95                 memcpy(temp, base, bytes);
96
97                 addr += bytes;
98                 temp += bytes;
99                 len  -= bytes;
100         }  
101 }
102
103 static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
104 {
105         unsigned long flags;
106         spin_lock_irqsave(&sdla_lock, flags);
107         __sdla_read(dev, addr, buf, len);
108         spin_unlock_irqrestore(&sdla_lock, flags);
109 }
110
111 static void __sdla_write(struct net_device *dev, int addr, 
112                          const void *buf, short len)
113 {
114         const char    *temp;
115         void          *base;
116         int           offset, bytes;
117
118         temp = buf;
119         while(len)
120         {
121                 offset = addr & SDLA_ADDR_MASK;
122                 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
123                 base = (void *) (dev->mem_start + offset);
124
125                 SDLA_WINDOW(dev, addr);
126                 memcpy(base, temp, bytes);
127
128                 addr += bytes;
129                 temp += bytes;
130                 len  -= bytes;
131         }
132 }
133
134 static void sdla_write(struct net_device *dev, int addr, 
135                        const void *buf, short len)
136 {
137         unsigned long flags;
138
139         spin_lock_irqsave(&sdla_lock, flags);
140         __sdla_write(dev, addr, buf, len);
141         spin_unlock_irqrestore(&sdla_lock, flags);
142 }
143
144
145 static void sdla_clear(struct net_device *dev)
146 {
147         unsigned long flags;
148         char          *base;
149         int           len, addr, bytes;
150
151         len = 65536;    
152         addr = 0;
153         bytes = SDLA_WINDOW_SIZE;
154         base = (void *) dev->mem_start;
155
156         spin_lock_irqsave(&sdla_lock, flags);
157         while(len)
158         {
159                 SDLA_WINDOW(dev, addr);
160                 memset(base, 0, bytes);
161
162                 addr += bytes;
163                 len  -= bytes;
164         }
165         spin_unlock_irqrestore(&sdla_lock, flags);
166
167 }
168
169 static char sdla_byte(struct net_device *dev, int addr)
170 {
171         unsigned long flags;
172         char          byte, *temp;
173
174         temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
175
176         spin_lock_irqsave(&sdla_lock, flags);
177         SDLA_WINDOW(dev, addr);
178         byte = *temp;
179         spin_unlock_irqrestore(&sdla_lock, flags);
180
181         return(byte);
182 }
183
184 static void sdla_stop(struct net_device *dev)
185 {
186         struct frad_local *flp;
187
188         flp = netdev_priv(dev);
189         switch(flp->type)
190         {
191                 case SDLA_S502A:
192                         outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
193                         flp->state = SDLA_HALT;
194                         break;
195                 case SDLA_S502E:
196                         outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
197                         outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
198                         flp->state = SDLA_S502E_ENABLE;
199                         break;
200                 case SDLA_S507:
201                         flp->state &= ~SDLA_CPUEN;
202                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
203                         break;
204                 case SDLA_S508:
205                         flp->state &= ~SDLA_CPUEN;
206                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
207                         break;
208         }
209 }
210
211 static void sdla_start(struct net_device *dev)
212 {
213         struct frad_local *flp;
214
215         flp = netdev_priv(dev);
216         switch(flp->type)
217         {
218                 case SDLA_S502A:
219                         outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
220                         outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
221                         flp->state = SDLA_S502A_START;
222                         break;
223                 case SDLA_S502E:
224                         outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
225                         outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
226                         flp->state = 0;
227                         break;
228                 case SDLA_S507:
229                         flp->state |= SDLA_CPUEN;
230                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
231                         break;
232                 case SDLA_S508:
233                         flp->state |= SDLA_CPUEN;
234                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
235                         break;
236         }
237 }
238
239 /****************************************************
240  *
241  * this is used for the S502A/E cards to determine
242  * the speed of the onboard CPU.  Calibration is
243  * necessary for the Frame Relay code uploaded 
244  * later.  Incorrect results cause timing problems
245  * with link checks & status messages
246  *
247  ***************************************************/
248
249 static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
250 {
251         unsigned long start, done, now;
252         char          resp, *temp;
253
254         start = now = jiffies;
255         done = jiffies + jiffs;
256
257         temp = (void *)dev->mem_start;
258         temp += z80_addr & SDLA_ADDR_MASK;
259         
260         resp = ~resp1;
261         while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
262         {
263                 if (jiffies != now)
264                 {
265                         SDLA_WINDOW(dev, z80_addr);
266                         now = jiffies;
267                         resp = *temp;
268                 }
269         }
270         return(time_before(jiffies, done) ? jiffies - start : -1);
271 }
272
273 /* constants for Z80 CPU speed */
274 #define Z80_READY               '1'     /* Z80 is ready to begin */
275 #define LOADER_READY            '2'     /* driver is ready to begin */
276 #define Z80_SCC_OK              '3'     /* SCC is on board */
277 #define Z80_SCC_BAD             '4'     /* SCC was not found */
278
279 static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
280 {
281         int  jiffs;
282         char data;
283
284         sdla_start(dev);
285         if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
286                 return(-EIO);
287
288         data = LOADER_READY;
289         sdla_write(dev, 0, &data, 1);
290
291         if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
292                 return(-EIO);
293
294         sdla_stop(dev);
295         sdla_read(dev, 0, &data, 1);
296
297         if (data == Z80_SCC_BAD)
298         {
299                 printk("%s: SCC bad\n", dev->name);
300                 return(-EIO);
301         }
302
303         if (data != Z80_SCC_OK)
304                 return(-EINVAL);
305
306         if (jiffs < 165)
307                 ifr->ifr_mtu = SDLA_CPU_16M;
308         else if (jiffs < 220)
309                 ifr->ifr_mtu = SDLA_CPU_10M;
310         else if (jiffs < 258)
311                 ifr->ifr_mtu = SDLA_CPU_8M;
312         else if (jiffs < 357)
313                 ifr->ifr_mtu = SDLA_CPU_7M;
314         else if (jiffs < 467)
315                 ifr->ifr_mtu = SDLA_CPU_5M;
316         else
317                 ifr->ifr_mtu = SDLA_CPU_3M;
318  
319         return(0);
320 }
321
322 /************************************************
323  *
324  *  Direct interaction with the Frame Relay code 
325  *  starts here.
326  *
327  ************************************************/
328
329 struct _dlci_stat 
330 {
331         short dlci;
332         char  flags;
333 } __attribute__((packed));
334
335 struct _frad_stat 
336 {
337         char    flags;
338         struct _dlci_stat dlcis[SDLA_MAX_DLCI];
339 };
340
341 static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data) 
342 {
343         struct _dlci_stat *pstatus;
344         short             *pdlci;
345         int               i;
346         char              *state, line[30];
347
348         switch (ret)
349         {
350                 case SDLA_RET_MODEM:
351                         state = data;
352                         if (*state & SDLA_MODEM_DCD_LOW)
353                                 printk(KERN_INFO "%s: Modem DCD unexpectedly low!\n", dev->name);
354                         if (*state & SDLA_MODEM_CTS_LOW)
355                                 printk(KERN_INFO "%s: Modem CTS unexpectedly low!\n", dev->name);
356                         /* I should probably do something about this! */
357                         break;
358
359                 case SDLA_RET_CHANNEL_OFF:
360                         printk(KERN_INFO "%s: Channel became inoperative!\n", dev->name);
361                         /* same here */
362                         break;
363
364                 case SDLA_RET_CHANNEL_ON:
365                         printk(KERN_INFO "%s: Channel became operative!\n", dev->name);
366                         /* same here */
367                         break;
368
369                 case SDLA_RET_DLCI_STATUS:
370                         printk(KERN_INFO "%s: Status change reported by Access Node.\n", dev->name);
371                         len /= sizeof(struct _dlci_stat);
372                         for(pstatus = data, i=0;i < len;i++,pstatus++)
373                         {
374                                 if (pstatus->flags & SDLA_DLCI_NEW)
375                                         state = "new";
376                                 else if (pstatus->flags & SDLA_DLCI_DELETED)
377                                         state = "deleted";
378                                 else if (pstatus->flags & SDLA_DLCI_ACTIVE)
379                                         state = "active";
380                                 else
381                                 {
382                                         sprintf(line, "unknown status: %02X", pstatus->flags);
383                                         state = line;
384                                 }
385                                 printk(KERN_INFO "%s: DLCI %i: %s.\n", dev->name, pstatus->dlci, state);
386                                 /* same here */
387                         }
388                         break;
389
390                 case SDLA_RET_DLCI_UNKNOWN:
391                         printk(KERN_INFO "%s: Received unknown DLCIs:", dev->name);
392                         len /= sizeof(short);
393                         for(pdlci = data,i=0;i < len;i++,pdlci++)
394                                 printk(" %i", *pdlci);
395                         printk("\n");
396                         break;
397
398                 case SDLA_RET_TIMEOUT:
399                         printk(KERN_ERR "%s: Command timed out!\n", dev->name);
400                         break;
401
402                 case SDLA_RET_BUF_OVERSIZE:
403                         printk(KERN_INFO "%s: Bc/CIR overflow, acceptable size is %i\n", dev->name, len);
404                         break;
405
406                 case SDLA_RET_BUF_TOO_BIG:
407                         printk(KERN_INFO "%s: Buffer size over specified max of %i\n", dev->name, len);
408                         break;
409
410                 case SDLA_RET_CHANNEL_INACTIVE:
411                 case SDLA_RET_DLCI_INACTIVE:
412                 case SDLA_RET_CIR_OVERFLOW:
413                 case SDLA_RET_NO_BUFS:
414                         if (cmd == SDLA_INFORMATION_WRITE)
415                                 break;
416
417                 default: 
418                         printk(KERN_DEBUG "%s: Cmd 0x%2.2X generated return code 0x%2.2X\n", dev->name, cmd, ret);
419                         /* Further processing could be done here */
420                         break;
421         }
422 }
423
424 static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags, 
425                         void *inbuf, short inlen, void *outbuf, short *outlen)
426 {
427         static struct _frad_stat status;
428         struct frad_local        *flp;
429         struct sdla_cmd          *cmd_buf;
430         unsigned long            pflags;
431         unsigned long            jiffs;
432         int                      ret, waiting, len;
433         long                     window;
434
435         flp = netdev_priv(dev);
436         window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
437         cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
438         ret = 0;
439         len = 0;
440         jiffs = jiffies + HZ;  /* 1 second is plenty */
441
442         spin_lock_irqsave(&sdla_lock, pflags);
443         SDLA_WINDOW(dev, window);
444         cmd_buf->cmd = cmd;
445         cmd_buf->dlci = dlci;
446         cmd_buf->flags = flags;
447
448         if (inbuf)
449                 memcpy(cmd_buf->data, inbuf, inlen);
450
451         cmd_buf->length = inlen;
452
453         cmd_buf->opp_flag = 1;
454         spin_unlock_irqrestore(&sdla_lock, pflags);
455
456         waiting = 1;
457         len = 0;
458         while (waiting && time_before_eq(jiffies, jiffs))
459         {
460                 if (waiting++ % 3) 
461                 {
462                         spin_lock_irqsave(&sdla_lock, pflags);
463                         SDLA_WINDOW(dev, window);
464                         waiting = ((volatile int)(cmd_buf->opp_flag));
465                         spin_unlock_irqrestore(&sdla_lock, pflags);
466                 }
467         }
468         
469         if (!waiting)
470         {
471
472                 spin_lock_irqsave(&sdla_lock, pflags);
473                 SDLA_WINDOW(dev, window);
474                 ret = cmd_buf->retval;
475                 len = cmd_buf->length;
476                 if (outbuf && outlen)
477                 {
478                         *outlen = *outlen >= len ? len : *outlen;
479
480                         if (*outlen)
481                                 memcpy(outbuf, cmd_buf->data, *outlen);
482                 }
483
484                 /* This is a local copy that's used for error handling */
485                 if (ret)
486                         memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
487
488                 spin_unlock_irqrestore(&sdla_lock, pflags);
489         }
490         else
491                 ret = SDLA_RET_TIMEOUT;
492
493         if (ret != SDLA_RET_OK)
494                 sdla_errors(dev, cmd, dlci, ret, len, &status);
495
496         return(ret);
497 }
498
499 /***********************************************
500  *
501  * these functions are called by the DLCI driver 
502  *
503  ***********************************************/
504
505 static int sdla_reconfig(struct net_device *dev);
506
507 static int sdla_activate(struct net_device *slave, struct net_device *master)
508 {
509         struct frad_local *flp;
510         int i;
511
512         flp = netdev_priv(slave);
513
514         for(i=0;i<CONFIG_DLCI_MAX;i++)
515                 if (flp->master[i] == master)
516                         break;
517
518         if (i == CONFIG_DLCI_MAX)
519                 return(-ENODEV);
520
521         flp->dlci[i] = abs(flp->dlci[i]);
522
523         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
524                 sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
525
526         return(0);
527 }
528
529 static int sdla_deactivate(struct net_device *slave, struct net_device *master)
530 {
531         struct frad_local *flp;
532         int               i;
533
534         flp = netdev_priv(slave);
535
536         for(i=0;i<CONFIG_DLCI_MAX;i++)
537                 if (flp->master[i] == master)
538                         break;
539
540         if (i == CONFIG_DLCI_MAX)
541                 return(-ENODEV);
542
543         flp->dlci[i] = -abs(flp->dlci[i]);
544
545         if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
546                 sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
547
548         return(0);
549 }
550
551 static int sdla_assoc(struct net_device *slave, struct net_device *master)
552 {
553         struct frad_local *flp;
554         int               i;
555
556         if (master->type != ARPHRD_DLCI)
557                 return(-EINVAL);
558
559         flp = netdev_priv(slave);
560
561         for(i=0;i<CONFIG_DLCI_MAX;i++)
562         {
563                 if (!flp->master[i])
564                         break;
565                 if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
566                         return(-EADDRINUSE);
567         } 
568
569         if (i == CONFIG_DLCI_MAX)
570                 return(-EMLINK);  /* #### Alan: Comments on this ?? */
571
572
573         flp->master[i] = master;
574         flp->dlci[i] = -*(short *)(master->dev_addr);
575         master->mtu = slave->mtu;
576
577         if (netif_running(slave)) {
578                 if (flp->config.station == FRAD_STATION_CPE)
579                         sdla_reconfig(slave);
580                 else
581                         sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
582         }
583
584         return(0);
585 }
586
587 static int sdla_deassoc(struct net_device *slave, struct net_device *master)
588 {
589         struct frad_local *flp;
590         int               i;
591
592         flp = netdev_priv(slave);
593
594         for(i=0;i<CONFIG_DLCI_MAX;i++)
595                 if (flp->master[i] == master)
596                         break;
597
598         if (i == CONFIG_DLCI_MAX)
599                 return(-ENODEV);
600
601         flp->master[i] = NULL;
602         flp->dlci[i] = 0;
603
604
605         if (netif_running(slave)) {
606                 if (flp->config.station == FRAD_STATION_CPE)
607                         sdla_reconfig(slave);
608                 else
609                         sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
610         }
611
612         return(0);
613 }
614
615 static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
616 {
617         struct frad_local *flp;
618         struct dlci_local *dlp;
619         int               i;
620         short             len, ret;
621
622         flp = netdev_priv(slave);
623
624         for(i=0;i<CONFIG_DLCI_MAX;i++)
625                 if (flp->master[i] == master)
626                         break;
627
628         if (i == CONFIG_DLCI_MAX)
629                 return(-ENODEV);
630
631         dlp = netdev_priv(master);
632
633         ret = SDLA_RET_OK;
634         len = sizeof(struct dlci_conf);
635         if (netif_running(slave)) {
636                 if (get)
637                         ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,  
638                                     NULL, 0, &dlp->config, &len);
639                 else
640                         ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,  
641                                     &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
642         }
643
644         return(ret == SDLA_RET_OK ? 0 : -EIO);
645 }
646
647 /**************************
648  *
649  * now for the Linux driver 
650  *
651  **************************/
652
653 /* NOTE: the DLCI driver deals with freeing the SKB!! */
654 static netdev_tx_t sdla_transmit(struct sk_buff *skb,
655                                  struct net_device *dev)
656 {
657         struct frad_local *flp;
658         int               ret, addr, accept, i;
659         short             size;
660         unsigned long     flags;
661         struct buf_entry  *pbuf;
662
663         flp = netdev_priv(dev);
664         ret = 0;
665         accept = 1;
666
667         netif_stop_queue(dev);
668
669         /*
670          * stupid GateD insists on setting up the multicast router thru us
671          * and we're ill equipped to handle a non Frame Relay packet at this
672          * time!
673          */
674
675         accept = 1;
676         switch (dev->type)
677         {
678                 case ARPHRD_FRAD:
679                         if (skb->dev->type != ARPHRD_DLCI)
680                         {
681                                 printk(KERN_WARNING "%s: Non DLCI device, type %i, tried to send on FRAD module.\n", dev->name, skb->dev->type);
682                                 accept = 0;
683                         }
684                         break;
685                 default:
686                         printk(KERN_WARNING "%s: unknown firmware type 0x%4.4X\n", dev->name, dev->type);
687                         accept = 0;
688                         break;
689         }
690         if (accept)
691         {
692                 /* this is frame specific, but till there's a PPP module, it's the default */
693                 switch (flp->type)
694                 {
695                         case SDLA_S502A:
696                         case SDLA_S502E:
697                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
698                                 break;
699                                 case SDLA_S508:
700                                 size = sizeof(addr);
701                                 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
702                                 if (ret == SDLA_RET_OK)
703                                 {
704
705                                         spin_lock_irqsave(&sdla_lock, flags);
706                                         SDLA_WINDOW(dev, addr);
707                                         pbuf = (void *)(((int) dev->mem_start) + (addr & SDLA_ADDR_MASK));
708                                         __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
709                                         SDLA_WINDOW(dev, addr);
710                                         pbuf->opp_flag = 1;
711                                         spin_unlock_irqrestore(&sdla_lock, flags);
712                                 }
713                                 break;
714                 }
715
716                 switch (ret)
717                 {
718                         case SDLA_RET_OK:
719                                 dev->stats.tx_packets++;
720                                 break;
721
722                         case SDLA_RET_CIR_OVERFLOW:
723                         case SDLA_RET_BUF_OVERSIZE:
724                         case SDLA_RET_NO_BUFS:
725                                 dev->stats.tx_dropped++;
726                                 break;
727
728                         default:
729                                 dev->stats.tx_errors++;
730                                 break;
731                 }
732         }
733         netif_wake_queue(dev);
734         for(i=0;i<CONFIG_DLCI_MAX;i++)
735         {
736                 if(flp->master[i]!=NULL)
737                         netif_wake_queue(flp->master[i]);
738         }               
739
740         dev_kfree_skb(skb);
741         return NETDEV_TX_OK;
742 }
743
744 static void sdla_receive(struct net_device *dev)
745 {
746         struct net_device         *master;
747         struct frad_local *flp;
748         struct dlci_local *dlp;
749         struct sk_buff   *skb;
750
751         struct sdla_cmd *cmd;
752         struct buf_info *pbufi;
753         struct buf_entry  *pbuf;
754
755         unsigned long     flags;
756         int               i=0, received, success, addr, buf_base, buf_top;
757         short             dlci, len, len2, split;
758
759         flp = netdev_priv(dev);
760         success = 1;
761         received = addr = buf_top = buf_base = 0;
762         len = dlci = 0;
763         skb = NULL;
764         master = NULL;
765         cmd = NULL;
766         pbufi = NULL;
767         pbuf = NULL;
768
769         spin_lock_irqsave(&sdla_lock, flags);
770
771         switch (flp->type)
772         {
773                 case SDLA_S502A:
774                 case SDLA_S502E:
775                         cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
776                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
777                         success = cmd->opp_flag;
778                         if (!success)
779                                 break;
780
781                         dlci = cmd->dlci;
782                         len = cmd->length;
783                         break;
784
785                 case SDLA_S508:
786                         pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
787                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
788                         pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
789                         success = pbuf->opp_flag;
790                         if (!success)
791                                 break;
792
793                         buf_top = pbufi->buf_top;
794                         buf_base = pbufi->buf_base;
795                         dlci = pbuf->dlci;
796                         len = pbuf->length;
797                         addr = pbuf->buf_addr;
798                         break;
799         }
800
801         /* common code, find the DLCI and get the SKB */
802         if (success)
803         {
804                 for (i=0;i<CONFIG_DLCI_MAX;i++)
805                         if (flp->dlci[i] == dlci)
806                                 break;
807
808                 if (i == CONFIG_DLCI_MAX)
809                 {
810                         printk(KERN_NOTICE "%s: Received packet from invalid DLCI %i, ignoring.", dev->name, dlci);
811                         dev->stats.rx_errors++;
812                         success = 0;
813                 }
814         }
815
816         if (success)
817         {
818                 master = flp->master[i];
819                 skb = dev_alloc_skb(len + sizeof(struct frhdr));
820                 if (skb == NULL) 
821                 {
822                         printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
823                         dev->stats.rx_dropped++;
824                         success = 0;
825                 }
826                 else
827                         skb_reserve(skb, sizeof(struct frhdr));
828         }
829
830         /* pick up the data */
831         switch (flp->type)
832         {
833                 case SDLA_S502A:
834                 case SDLA_S502E:
835                         if (success)
836                                 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
837
838                         SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
839                         cmd->opp_flag = 0;
840                         break;
841
842                 case SDLA_S508:
843                         if (success)
844                         {
845                                 /* is this buffer split off the end of the internal ring buffer */
846                                 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
847                                 len2 = len - split;
848
849                                 __sdla_read(dev, addr, skb_put(skb, len2), len2);
850                                 if (split)
851                                         __sdla_read(dev, buf_base, skb_put(skb, split), split);
852                         }
853
854                         /* increment the buffer we're looking at */
855                         SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
856                         flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
857                         pbuf->opp_flag = 0;
858                         break;
859         }
860
861         if (success)
862         {
863                 dev->stats.rx_packets++;
864                 dlp = netdev_priv(master);
865                 (*dlp->receive)(skb, master);
866         }
867
868         spin_unlock_irqrestore(&sdla_lock, flags);
869 }
870
871 static irqreturn_t sdla_isr(int dummy, void *dev_id)
872 {
873         struct net_device     *dev;
874         struct frad_local *flp;
875         char              byte;
876
877         dev = dev_id;
878
879         flp = netdev_priv(dev);
880
881         if (!flp->initialized)
882         {
883                 printk(KERN_WARNING "%s: irq %d for uninitialized device.\n",
884                        dev->name, dev->irq);
885                 return IRQ_NONE;
886         }
887
888         byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
889         switch (byte)
890         {
891                 case SDLA_INTR_RX:
892                         sdla_receive(dev);
893                         break;
894
895                 /* the command will get an error return, which is processed above */
896                 case SDLA_INTR_MODEM:
897                 case SDLA_INTR_STATUS:
898                         sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
899                         break;
900
901                 case SDLA_INTR_TX:
902                 case SDLA_INTR_COMPLETE:
903                 case SDLA_INTR_TIMER:
904                         printk(KERN_WARNING "%s: invalid irq flag 0x%02X.\n", dev->name, byte);
905                         break;
906         }
907
908         /* the S502E requires a manual acknowledgement of the interrupt */ 
909         if (flp->type == SDLA_S502E)
910         {
911                 flp->state &= ~SDLA_S502E_INTACK;
912                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
913                 flp->state |= SDLA_S502E_INTACK;
914                 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
915         }
916
917         /* this clears the byte, informing the Z80 we're done */
918         byte = 0;
919         sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
920         return IRQ_HANDLED;
921 }
922
923 static void sdla_poll(unsigned long device)
924 {
925         struct net_device         *dev;
926         struct frad_local *flp;
927
928         dev = (struct net_device *) device;
929         flp = netdev_priv(dev);
930
931         if (sdla_byte(dev, SDLA_502_RCV_BUF))
932                 sdla_receive(dev);
933
934         flp->timer.expires = 1;
935         add_timer(&flp->timer);
936 }
937
938 static int sdla_close(struct net_device *dev)
939 {
940         struct frad_local *flp;
941         struct intr_info  intr;
942         int               len, i;
943         short             dlcis[CONFIG_DLCI_MAX];
944
945         flp = netdev_priv(dev);
946
947         len = 0;
948         for(i=0;i<CONFIG_DLCI_MAX;i++)
949                 if (flp->dlci[i])
950                         dlcis[len++] = abs(flp->dlci[i]);
951         len *= 2;
952
953         if (flp->config.station == FRAD_STATION_NODE)
954         {
955                 for(i=0;i<CONFIG_DLCI_MAX;i++)
956                         if (flp->dlci[i] > 0) 
957                                 sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
958                 sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
959         }
960
961         memset(&intr, 0, sizeof(intr));
962         /* let's start up the reception */
963         switch(flp->type)
964         {
965                 case SDLA_S502A:
966                         del_timer(&flp->timer); 
967                         break;
968
969                 case SDLA_S502E:
970                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
971                         flp->state &= ~SDLA_S502E_INTACK;
972                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
973                         break;
974
975                 case SDLA_S507:
976                         break;
977
978                 case SDLA_S508:
979                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
980                         flp->state &= ~SDLA_S508_INTEN;
981                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
982                         break;
983         }
984
985         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
986
987         netif_stop_queue(dev);
988         
989         return(0);
990 }
991
992 struct conf_data {
993         struct frad_conf config;
994         short            dlci[CONFIG_DLCI_MAX];
995 };
996
997 static int sdla_open(struct net_device *dev)
998 {
999         struct frad_local *flp;
1000         struct dlci_local *dlp;
1001         struct conf_data  data;
1002         struct intr_info  intr;
1003         int               len, i;
1004         char              byte;
1005
1006         flp = netdev_priv(dev);
1007
1008         if (!flp->initialized)
1009                 return(-EPERM);
1010
1011         if (!flp->configured)
1012                 return(-EPERM);
1013
1014         /* time to send in the configuration */
1015         len = 0;
1016         for(i=0;i<CONFIG_DLCI_MAX;i++)
1017                 if (flp->dlci[i])
1018                         data.dlci[len++] = abs(flp->dlci[i]);
1019         len *= 2;
1020
1021         memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1022         len += sizeof(struct frad_conf);
1023
1024         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1025         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1026
1027         if (flp->type == SDLA_S508)
1028                 flp->buffer = 0;
1029
1030         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1031
1032         /* let's start up the reception */
1033         memset(&intr, 0, sizeof(intr));
1034         switch(flp->type)
1035         {
1036                 case SDLA_S502A:
1037                         flp->timer.expires = 1;
1038                         add_timer(&flp->timer);
1039                         break;
1040
1041                 case SDLA_S502E:
1042                         flp->state |= SDLA_S502E_ENABLE;
1043                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1044                         flp->state |= SDLA_S502E_INTACK;
1045                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1046                         byte = 0;
1047                         sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1048                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1049                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1050                         break;
1051
1052                 case SDLA_S507:
1053                         break;
1054
1055                 case SDLA_S508:
1056                         flp->state |= SDLA_S508_INTEN;
1057                         outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1058                         byte = 0;
1059                         sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1060                         intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1061                         intr.irq = dev->irq;
1062                         sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1063                         break;
1064         }
1065
1066         if (flp->config.station == FRAD_STATION_CPE)
1067         {
1068                 byte = SDLA_ICS_STATUS_ENQ;
1069                 sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1070         }
1071         else
1072         {
1073                 sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1074                 for(i=0;i<CONFIG_DLCI_MAX;i++)
1075                         if (flp->dlci[i] > 0)
1076                                 sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1077         }
1078
1079         /* configure any specific DLCI settings */
1080         for(i=0;i<CONFIG_DLCI_MAX;i++)
1081                 if (flp->dlci[i])
1082                 {
1083                         dlp = netdev_priv(flp->master[i]);
1084                         if (dlp->configured)
1085                                 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1086                 }
1087
1088         netif_start_queue(dev);
1089         
1090         return(0);
1091 }
1092
1093 static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
1094 {
1095         struct frad_local *flp;
1096         struct conf_data  data;
1097         int               i;
1098         short             size;
1099
1100         if (dev->type == 0xFFFF)
1101                 return(-EUNATCH);
1102
1103         flp = netdev_priv(dev);
1104
1105         if (!get)
1106         {
1107                 if (netif_running(dev))
1108                         return(-EBUSY);
1109
1110                 if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
1111                         return -EFAULT;
1112
1113                 if (data.config.station & ~FRAD_STATION_NODE)
1114                         return(-EINVAL);
1115
1116                 if (data.config.flags & ~FRAD_VALID_FLAGS)
1117                         return(-EINVAL);
1118
1119                 if ((data.config.kbaud < 0) || 
1120                          ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1121                         return(-EINVAL);
1122
1123                 if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1124                         return(-EINVAL);
1125
1126                 if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1127                         return(-EINVAL);
1128
1129                 if ((data.config.T391 < 5) || (data.config.T391 > 30))
1130                         return(-EINVAL);
1131
1132                 if ((data.config.T392 < 5) || (data.config.T392 > 30))
1133                         return(-EINVAL);
1134
1135                 if ((data.config.N391 < 1) || (data.config.N391 > 255))
1136                         return(-EINVAL);
1137
1138                 if ((data.config.N392 < 1) || (data.config.N392 > 10))
1139                         return(-EINVAL);
1140
1141                 if ((data.config.N393 < 1) || (data.config.N393 > 10))
1142                         return(-EINVAL);
1143
1144                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1145                 flp->config.flags |= SDLA_DIRECT_RECV;
1146
1147                 if (flp->type == SDLA_S508)
1148                         flp->config.flags |= SDLA_TX70_RX30;
1149
1150                 if (dev->mtu != flp->config.mtu)
1151                 {
1152                         /* this is required to change the MTU */
1153                         dev->mtu = flp->config.mtu;
1154                         for(i=0;i<CONFIG_DLCI_MAX;i++)
1155                                 if (flp->master[i])
1156                                         flp->master[i]->mtu = flp->config.mtu;
1157                 }
1158
1159                 flp->config.mtu += sizeof(struct frhdr);
1160
1161                 /* off to the races! */
1162                 if (!flp->configured)
1163                         sdla_start(dev);
1164
1165                 flp->configured = 1;
1166         }
1167         else
1168         {
1169                 /* no sense reading if the CPU isn't started */
1170                 if (netif_running(dev))
1171                 {
1172                         size = sizeof(data);
1173                         if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1174                                 return(-EIO);
1175                 }
1176                 else
1177                         if (flp->configured)
1178                                 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1179                         else
1180                                 memset(&data.config, 0, sizeof(struct frad_conf));
1181
1182                 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1183                 data.config.flags &= FRAD_VALID_FLAGS;
1184                 data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1185                 return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
1186         }
1187
1188         return(0);
1189 }
1190
1191 static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
1192 {
1193         struct sdla_mem mem;
1194         char    *temp;
1195
1196         if(copy_from_user(&mem, info, sizeof(mem)))
1197                 return -EFAULT;
1198                 
1199         if (read)
1200         {       
1201                 temp = kzalloc(mem.len, GFP_KERNEL);
1202                 if (!temp)
1203                         return(-ENOMEM);
1204                 sdla_read(dev, mem.addr, temp, mem.len);
1205                 if(copy_to_user(mem.data, temp, mem.len))
1206                 {
1207                         kfree(temp);
1208                         return -EFAULT;
1209                 }
1210                 kfree(temp);
1211         }
1212         else
1213         {
1214                 temp = kmalloc(mem.len, GFP_KERNEL);
1215                 if (!temp)
1216                         return(-ENOMEM);
1217                 if(copy_from_user(temp, mem.data, mem.len))
1218                 {
1219                         kfree(temp);
1220                         return -EFAULT;
1221                 }
1222                 sdla_write(dev, mem.addr, temp, mem.len);
1223                 kfree(temp);
1224         }
1225         return(0);
1226 }
1227
1228 static int sdla_reconfig(struct net_device *dev)
1229 {
1230         struct frad_local *flp;
1231         struct conf_data  data;
1232         int               i, len;
1233
1234         flp = netdev_priv(dev);
1235
1236         len = 0;
1237         for(i=0;i<CONFIG_DLCI_MAX;i++)
1238                 if (flp->dlci[i])
1239                         data.dlci[len++] = flp->dlci[i];
1240         len *= 2;
1241
1242         memcpy(&data, &flp->config, sizeof(struct frad_conf));
1243         len += sizeof(struct frad_conf);
1244
1245         sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1246         sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1247         sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1248
1249         return(0);
1250 }
1251
1252 static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1253 {
1254         struct frad_local *flp;
1255
1256         if(!capable(CAP_NET_ADMIN))
1257                 return -EPERM;
1258                 
1259         flp = netdev_priv(dev);
1260
1261         if (!flp->initialized)
1262                 return(-EINVAL);
1263
1264         switch (cmd)
1265         {
1266                 case FRAD_GET_CONF:
1267                 case FRAD_SET_CONF:
1268                         return(sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF));
1269
1270                 case SDLA_IDENTIFY:
1271                         ifr->ifr_flags = flp->type;
1272                         break;
1273
1274                 case SDLA_CPUSPEED:
1275                         return(sdla_cpuspeed(dev, ifr)); 
1276
1277 /* ==========================================================
1278 NOTE:  This is rather a useless action right now, as the
1279        current driver does not support protocols other than
1280        FR.  However, Sangoma has modules for a number of
1281        other protocols in the works.
1282 ============================================================*/
1283                 case SDLA_PROTOCOL:
1284                         if (flp->configured)
1285                                 return(-EALREADY);
1286
1287                         switch (ifr->ifr_flags)
1288                         {
1289                                 case ARPHRD_FRAD:
1290                                         dev->type = ifr->ifr_flags;
1291                                         break;
1292                                 default:
1293                                         return(-ENOPROTOOPT);
1294                         }
1295                         break;
1296
1297                 case SDLA_CLEARMEM:
1298                         sdla_clear(dev);
1299                         break;
1300
1301                 case SDLA_WRITEMEM:
1302                 case SDLA_READMEM:
1303                         if(!capable(CAP_SYS_RAWIO))
1304                                 return -EPERM;
1305                         return(sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM));
1306
1307                 case SDLA_START:
1308                         sdla_start(dev);
1309                         break;
1310
1311                 case SDLA_STOP:
1312                         sdla_stop(dev);
1313                         break;
1314
1315                 default:
1316                         return(-EOPNOTSUPP);
1317         }
1318         return(0);
1319 }
1320
1321 static int sdla_change_mtu(struct net_device *dev, int new_mtu)
1322 {
1323         struct frad_local *flp;
1324
1325         flp = netdev_priv(dev);
1326
1327         if (netif_running(dev))
1328                 return(-EBUSY);
1329
1330         /* for now, you can't change the MTU! */
1331         return(-EOPNOTSUPP);
1332 }
1333
1334 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1335 {
1336         struct frad_local *flp;
1337         int               i;
1338         char              byte;
1339         unsigned base;
1340         int err = -EINVAL;
1341
1342         flp = netdev_priv(dev);
1343
1344         if (flp->initialized)
1345                 return(-EINVAL);
1346
1347         for(i=0; i < ARRAY_SIZE(valid_port); i++)
1348                 if (valid_port[i] == map->base_addr)
1349                         break;   
1350
1351         if (i == ARRAY_SIZE(valid_port))
1352                 return(-EINVAL);
1353
1354         if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1355                 printk(KERN_WARNING "SDLA: io-port 0x%04lx in use \n", dev->base_addr);
1356                 return(-EINVAL);
1357         }
1358         base = map->base_addr;
1359
1360         /* test for card types, S502A, S502E, S507, S508                 */
1361         /* these tests shut down the card completely, so clear the state */
1362         flp->type = SDLA_UNKNOWN;
1363         flp->state = 0;
1364    
1365         for(i=1;i<SDLA_IO_EXTENTS;i++)
1366                 if (inb(base + i) != 0xFF)
1367                         break;
1368
1369         if (i == SDLA_IO_EXTENTS) {   
1370                 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1371                 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1372                         outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1373                         if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1374                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1375                                 flp->type = SDLA_S502E;
1376                                 goto got_type;
1377                         }
1378                 }
1379         }
1380
1381         for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1382                 if (inb(base + i) != byte)
1383                         break;
1384
1385         if (i == SDLA_IO_EXTENTS) {
1386                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1387                 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1388                         outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1389                         if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1390                                 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1391                                 flp->type = SDLA_S507;
1392                                 goto got_type;
1393                         }
1394                 }
1395         }
1396
1397         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1398         if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1399                 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1400                 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1401                         outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1402                         flp->type = SDLA_S508;
1403                         goto got_type;
1404                 }
1405         }
1406
1407         outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1408         if (inb(base + SDLA_S502_STS) == 0x40) {
1409                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1410                 if (inb(base + SDLA_S502_STS) == 0x40) {
1411                         outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1412                         if (inb(base + SDLA_S502_STS) == 0x44) {
1413                                 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1414                                 flp->type = SDLA_S502A;
1415                                 goto got_type;
1416                         }
1417                 }
1418         }
1419
1420         printk(KERN_NOTICE "%s: Unknown card type\n", dev->name);
1421         err = -ENODEV;
1422         goto fail;
1423
1424 got_type:
1425         switch(base) {
1426                 case 0x270:
1427                 case 0x280:
1428                 case 0x380: 
1429                 case 0x390:
1430                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1431                                 goto fail;
1432         }
1433
1434         switch (map->irq) {
1435                 case 2:
1436                         if (flp->type != SDLA_S502E)
1437                                 goto fail;
1438                         break;
1439
1440                 case 10:
1441                 case 11:
1442                 case 12:
1443                 case 15:
1444                 case 4:
1445                         if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1446                                 goto fail;
1447                         break;
1448                 case 3:
1449                 case 5:
1450                 case 7:
1451                         if (flp->type == SDLA_S502A)
1452                                 goto fail;
1453                         break;
1454
1455                 default:
1456                         goto fail;
1457         }
1458
1459         err = -EAGAIN;
1460         if (request_irq(dev->irq, sdla_isr, 0, dev->name, dev)) 
1461                 goto fail;
1462
1463         if (flp->type == SDLA_S507) {
1464                 switch(dev->irq) {
1465                         case 3:
1466                                 flp->state = SDLA_S507_IRQ3;
1467                                 break;
1468                         case 4:
1469                                 flp->state = SDLA_S507_IRQ4;
1470                                 break;
1471                         case 5:
1472                                 flp->state = SDLA_S507_IRQ5;
1473                                 break;
1474                         case 7:
1475                                 flp->state = SDLA_S507_IRQ7;
1476                                 break;
1477                         case 10:
1478                                 flp->state = SDLA_S507_IRQ10;
1479                                 break;
1480                         case 11:
1481                                 flp->state = SDLA_S507_IRQ11;
1482                                 break;
1483                         case 12:
1484                                 flp->state = SDLA_S507_IRQ12;
1485                                 break;
1486                         case 15:
1487                                 flp->state = SDLA_S507_IRQ15;
1488                                 break;
1489                 }
1490         }
1491
1492         for(i=0; i < ARRAY_SIZE(valid_mem); i++)
1493                 if (valid_mem[i] == map->mem_start)
1494                         break;   
1495
1496         err = -EINVAL;
1497         if (i == ARRAY_SIZE(valid_mem))
1498                 goto fail2;
1499
1500         if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1501                 goto fail2;
1502
1503         if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1504                 goto fail2;
1505
1506         if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1507                 goto fail2;
1508
1509         byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1510         byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1511         switch(flp->type) {
1512                 case SDLA_S502A:
1513                 case SDLA_S502E:
1514                         switch (map->mem_start >> 16) {
1515                                 case 0x0A:
1516                                         byte |= SDLA_S502_SEG_A;
1517                                         break;
1518                                 case 0x0C:
1519                                         byte |= SDLA_S502_SEG_C;
1520                                         break;
1521                                 case 0x0D:
1522                                         byte |= SDLA_S502_SEG_D;
1523                                         break;
1524                                 case 0x0E:
1525                                         byte |= SDLA_S502_SEG_E;
1526                                         break;
1527                         }
1528                         break;
1529                 case SDLA_S507:
1530                         switch (map->mem_start >> 16) {
1531                                 case 0x0A:
1532                                         byte |= SDLA_S507_SEG_A;
1533                                         break;
1534                                 case 0x0B:
1535                                         byte |= SDLA_S507_SEG_B;
1536                                         break;
1537                                 case 0x0C:
1538                                         byte |= SDLA_S507_SEG_C;
1539                                         break;
1540                                 case 0x0E:
1541                                         byte |= SDLA_S507_SEG_E;
1542                                         break;
1543                         }
1544                         break;
1545                 case SDLA_S508:
1546                         switch (map->mem_start >> 16) {
1547                                 case 0x0A:
1548                                         byte |= SDLA_S508_SEG_A;
1549                                         break;
1550                                 case 0x0C:
1551                                         byte |= SDLA_S508_SEG_C;
1552                                         break;
1553                                 case 0x0D:
1554                                         byte |= SDLA_S508_SEG_D;
1555                                         break;
1556                                 case 0x0E:
1557                                         byte |= SDLA_S508_SEG_E;
1558                                         break;
1559                         }
1560                         break;
1561         }
1562
1563         /* set the memory bits, and enable access */
1564         outb(byte, base + SDLA_REG_PC_WINDOW);
1565
1566         switch(flp->type)
1567         {
1568                 case SDLA_S502E:
1569                         flp->state = SDLA_S502E_ENABLE;
1570                         break;
1571                 case SDLA_S507:
1572                         flp->state |= SDLA_MEMEN;
1573                         break;
1574                 case SDLA_S508:
1575                         flp->state = SDLA_MEMEN;
1576                         break;
1577         }
1578         outb(flp->state, base + SDLA_REG_CONTROL);
1579
1580         dev->irq = map->irq;
1581         dev->base_addr = base;
1582         dev->mem_start = map->mem_start;
1583         dev->mem_end = dev->mem_start + 0x2000;
1584         flp->initialized = 1;
1585         return 0;
1586
1587 fail2:
1588         free_irq(map->irq, dev);
1589 fail:
1590         release_region(base, SDLA_IO_EXTENTS);
1591         return err;
1592 }
1593  
1594 static const struct net_device_ops sdla_netdev_ops = {
1595         .ndo_open       = sdla_open,
1596         .ndo_stop       = sdla_close,
1597         .ndo_do_ioctl   = sdla_ioctl,
1598         .ndo_set_config = sdla_set_config,
1599         .ndo_start_xmit = sdla_transmit,
1600         .ndo_change_mtu = sdla_change_mtu,
1601 };
1602
1603 static void setup_sdla(struct net_device *dev)
1604 {
1605         struct frad_local *flp = netdev_priv(dev);
1606
1607         netdev_boot_setup_check(dev);
1608
1609         dev->netdev_ops         = &sdla_netdev_ops;
1610         dev->flags              = 0;
1611         dev->type               = 0xFFFF;
1612         dev->hard_header_len    = 0;
1613         dev->addr_len           = 0;
1614         dev->mtu                = SDLA_MAX_MTU;
1615
1616         flp->activate           = sdla_activate;
1617         flp->deactivate         = sdla_deactivate;
1618         flp->assoc              = sdla_assoc;
1619         flp->deassoc            = sdla_deassoc;
1620         flp->dlci_conf          = sdla_dlci_conf;
1621
1622         init_timer(&flp->timer);
1623         flp->timer.expires      = 1;
1624         flp->timer.data         = (unsigned long) dev;
1625         flp->timer.function     = sdla_poll;
1626 }
1627
1628 static struct net_device *sdla;
1629
1630 static int __init init_sdla(void)
1631 {
1632         int err;
1633
1634         printk("%s.\n", version);
1635
1636         sdla = alloc_netdev(sizeof(struct frad_local), "sdla0", setup_sdla);
1637         if (!sdla) 
1638                 return -ENOMEM;
1639
1640         err = register_netdev(sdla);
1641         if (err) 
1642                 free_netdev(sdla);
1643
1644         return err;
1645 }
1646
1647 static void __exit exit_sdla(void)
1648 {
1649         struct frad_local *flp = netdev_priv(sdla);
1650
1651         unregister_netdev(sdla);
1652         if (flp->initialized) {
1653                 free_irq(sdla->irq, sdla);
1654                 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1655         }
1656         del_timer_sync(&flp->timer);
1657         free_netdev(sdla);
1658 }
1659
1660 MODULE_LICENSE("GPL");
1661
1662 module_init(init_sdla);
1663 module_exit(exit_sdla);