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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / wan / sdla.c
blob77ccf3672ede7db77071d0cba13ad49ba8f3e4b3
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * SDLA An implementation of a driver for the Sangoma S502/S508 series
4 * multi-protocol PC interface card. Initial offering is with
5 * the DLCI driver, providing Frame Relay support for linux.
6 *
7 * Global definitions for the Frame relay interface.
8 *
9 * Version: @(#)sdla.c 0.30 12 Sep 1996
10 *
11 * Credits: Sangoma Technologies, for the use of 2 cards for an extended
12 * period of time.
13 * David Mandelstam <dm@sangoma.com> for getting me started on
14 * this project, and incentive to complete it.
15 * Gene Kozen <74604.152@compuserve.com> for providing me with
16 * important information about the cards.
17 *
18 * Author: Mike McLagan <mike.mclagan@linux.org>
19 *
20 * Changes:
21 * 0.15 Mike McLagan Improved error handling, packet dropping
22 * 0.20 Mike McLagan New transmit/receive flags for config
23 * If in FR mode, don't accept packets from
24 * non DLCI devices.
25 * 0.25 Mike McLagan Fixed problem with rejecting packets
26 * from non DLCI devices.
27 * 0.30 Mike McLagan Fixed kernel panic when used with modified
28 * ifconfig
29 */
30
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
32
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/types.h>
36 #include <linux/fcntl.h>
37 #include <linux/interrupt.h>
38 #include <linux/ptrace.h>
39 #include <linux/ioport.h>
40 #include <linux/in.h>
41 #include <linux/slab.h>
42 #include <linux/string.h>
43 #include <linux/timer.h>
44 #include <linux/errno.h>
45 #include <linux/init.h>
46 #include <linux/netdevice.h>
47 #include <linux/skbuff.h>
48 #include <linux/if_arp.h>
49 #include <linux/if_frad.h>
50 #include <linux/sdla.h>
51 #include <linux/bitops.h>
52
53 #include <asm/io.h>
54 #include <asm/dma.h>
55 #include <linux/uaccess.h>
56
57 static const char* version = "SDLA driver v0.30, 12 Sep 1996, mike.mclagan@linux.org";
58
59 static unsigned int valid_port[] = { 0x250, 0x270, 0x280, 0x300, 0x350, 0x360, 0x380, 0x390};
60
61 static unsigned int valid_mem[] = {
62 0xA0000, 0xA2000, 0xA4000, 0xA6000, 0xA8000, 0xAA000, 0xAC000, 0xAE000,
63 0xB0000, 0xB2000, 0xB4000, 0xB6000, 0xB8000, 0xBA000, 0xBC000, 0xBE000,
64 0xC0000, 0xC2000, 0xC4000, 0xC6000, 0xC8000, 0xCA000, 0xCC000, 0xCE000,
65 0xD0000, 0xD2000, 0xD4000, 0xD6000, 0xD8000, 0xDA000, 0xDC000, 0xDE000,
66 0xE0000, 0xE2000, 0xE4000, 0xE6000, 0xE8000, 0xEA000, 0xEC000, 0xEE000};
67
68 static DEFINE_SPINLOCK(sdla_lock);
69
70 /*********************************************************
71 *
72 * these are the core routines that access the card itself
73 *
74 *********************************************************/
75
76 #define SDLA_WINDOW(dev,addr) outb((((addr) >> 13) & 0x1F), (dev)->base_addr + SDLA_REG_Z80_WINDOW)
77
78 static void __sdla_read(struct net_device *dev, int addr, void *buf, short len)
79 {
80 char *temp;
81 const void *base;
82 int offset, bytes;
83
84 temp = buf;
85 while(len)
86 {
87 offset = addr & SDLA_ADDR_MASK;
88 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
89 base = (const void *) (dev->mem_start + offset);
90
91 SDLA_WINDOW(dev, addr);
92 memcpy(temp, base, bytes);
93
94 addr += bytes;
95 temp += bytes;
96 len -= bytes;
97 }
98 }
99
100 static void sdla_read(struct net_device *dev, int addr, void *buf, short len)
101 {
102 unsigned long flags;
103 spin_lock_irqsave(&sdla_lock, flags);
104 __sdla_read(dev, addr, buf, len);
105 spin_unlock_irqrestore(&sdla_lock, flags);
106 }
107
108 static void __sdla_write(struct net_device *dev, int addr,
109 const void *buf, short len)
110 {
111 const char *temp;
112 void *base;
113 int offset, bytes;
114
115 temp = buf;
116 while(len)
117 {
118 offset = addr & SDLA_ADDR_MASK;
119 bytes = offset + len > SDLA_WINDOW_SIZE ? SDLA_WINDOW_SIZE - offset : len;
120 base = (void *) (dev->mem_start + offset);
121
122 SDLA_WINDOW(dev, addr);
123 memcpy(base, temp, bytes);
124
125 addr += bytes;
126 temp += bytes;
127 len -= bytes;
128 }
129 }
130
131 static void sdla_write(struct net_device *dev, int addr,
132 const void *buf, short len)
133 {
134 unsigned long flags;
135
136 spin_lock_irqsave(&sdla_lock, flags);
137 __sdla_write(dev, addr, buf, len);
138 spin_unlock_irqrestore(&sdla_lock, flags);
139 }
140
141
142 static void sdla_clear(struct net_device *dev)
143 {
144 unsigned long flags;
145 char *base;
146 int len, addr, bytes;
147
148 len = 65536;
149 addr = 0;
150 bytes = SDLA_WINDOW_SIZE;
151 base = (void *) dev->mem_start;
152
153 spin_lock_irqsave(&sdla_lock, flags);
154 while(len)
155 {
156 SDLA_WINDOW(dev, addr);
157 memset(base, 0, bytes);
158
159 addr += bytes;
160 len -= bytes;
161 }
162 spin_unlock_irqrestore(&sdla_lock, flags);
163
164 }
165
166 static char sdla_byte(struct net_device *dev, int addr)
167 {
168 unsigned long flags;
169 char byte, *temp;
170
171 temp = (void *) (dev->mem_start + (addr & SDLA_ADDR_MASK));
172
173 spin_lock_irqsave(&sdla_lock, flags);
174 SDLA_WINDOW(dev, addr);
175 byte = *temp;
176 spin_unlock_irqrestore(&sdla_lock, flags);
177
178 return byte;
179 }
180
181 static void sdla_stop(struct net_device *dev)
182 {
183 struct frad_local *flp;
184
185 flp = netdev_priv(dev);
186 switch(flp->type)
187 {
188 case SDLA_S502A:
189 outb(SDLA_S502A_HALT, dev->base_addr + SDLA_REG_CONTROL);
190 flp->state = SDLA_HALT;
191 break;
192 case SDLA_S502E:
193 outb(SDLA_HALT, dev->base_addr + SDLA_REG_Z80_CONTROL);
194 outb(SDLA_S502E_ENABLE, dev->base_addr + SDLA_REG_CONTROL);
195 flp->state = SDLA_S502E_ENABLE;
196 break;
197 case SDLA_S507:
198 flp->state &= ~SDLA_CPUEN;
199 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
200 break;
201 case SDLA_S508:
202 flp->state &= ~SDLA_CPUEN;
203 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
204 break;
205 }
206 }
207
208 static void sdla_start(struct net_device *dev)
209 {
210 struct frad_local *flp;
211
212 flp = netdev_priv(dev);
213 switch(flp->type)
214 {
215 case SDLA_S502A:
216 outb(SDLA_S502A_NMI, dev->base_addr + SDLA_REG_CONTROL);
217 outb(SDLA_S502A_START, dev->base_addr + SDLA_REG_CONTROL);
218 flp->state = SDLA_S502A_START;
219 break;
220 case SDLA_S502E:
221 outb(SDLA_S502E_CPUEN, dev->base_addr + SDLA_REG_Z80_CONTROL);
222 outb(0x00, dev->base_addr + SDLA_REG_CONTROL);
223 flp->state = 0;
224 break;
225 case SDLA_S507:
226 flp->state |= SDLA_CPUEN;
227 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
228 break;
229 case SDLA_S508:
230 flp->state |= SDLA_CPUEN;
231 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
232 break;
233 }
234 }
235
236 /****************************************************
237 *
238 * this is used for the S502A/E cards to determine
239 * the speed of the onboard CPU. Calibration is
240 * necessary for the Frame Relay code uploaded
241 * later. Incorrect results cause timing problems
242 * with link checks & status messages
243 *
244 ***************************************************/
245
246 static int sdla_z80_poll(struct net_device *dev, int z80_addr, int jiffs, char resp1, char resp2)
247 {
248 unsigned long start, done, now;
249 char resp, *temp;
250
251 start = now = jiffies;
252 done = jiffies + jiffs;
253
254 temp = (void *)dev->mem_start;
255 temp += z80_addr & SDLA_ADDR_MASK;
256
257 resp = ~resp1;
258 while (time_before(jiffies, done) && (resp != resp1) && (!resp2 || (resp != resp2)))
259 {
260 if (jiffies != now)
261 {
262 SDLA_WINDOW(dev, z80_addr);
263 now = jiffies;
264 resp = *temp;
265 }
266 }
267 return time_before(jiffies, done) ? jiffies - start : -1;
268 }
269
270 /* constants for Z80 CPU speed */
271 #define Z80_READY '1' /* Z80 is ready to begin */
272 #define LOADER_READY '2' /* driver is ready to begin */
273 #define Z80_SCC_OK '3' /* SCC is on board */
274 #define Z80_SCC_BAD '4' /* SCC was not found */
275
276 static int sdla_cpuspeed(struct net_device *dev, struct ifreq *ifr)
277 {
278 int jiffs;
279 char data;
280
281 sdla_start(dev);
282 if (sdla_z80_poll(dev, 0, 3*HZ, Z80_READY, 0) < 0)
283 return -EIO;
284
285 data = LOADER_READY;
286 sdla_write(dev, 0, &data, 1);
287
288 if ((jiffs = sdla_z80_poll(dev, 0, 8*HZ, Z80_SCC_OK, Z80_SCC_BAD)) < 0)
289 return -EIO;
290
291 sdla_stop(dev);
292 sdla_read(dev, 0, &data, 1);
293
294 if (data == Z80_SCC_BAD)
295 {
296 printk("%s: SCC bad\n", dev->name);
297 return -EIO;
298 }
299
300 if (data != Z80_SCC_OK)
301 return -EINVAL;
302
303 if (jiffs < 165)
304 ifr->ifr_mtu = SDLA_CPU_16M;
305 else if (jiffs < 220)
306 ifr->ifr_mtu = SDLA_CPU_10M;
307 else if (jiffs < 258)
308 ifr->ifr_mtu = SDLA_CPU_8M;
309 else if (jiffs < 357)
310 ifr->ifr_mtu = SDLA_CPU_7M;
311 else if (jiffs < 467)
312 ifr->ifr_mtu = SDLA_CPU_5M;
313 else
314 ifr->ifr_mtu = SDLA_CPU_3M;
315
316 return 0;
317 }
318
319 /************************************************
320 *
321 * Direct interaction with the Frame Relay code
322 * starts here.
323 *
324 ************************************************/
325
326 struct _dlci_stat
327 {
328 short dlci;
329 char flags;
330 } __packed;
331
332 struct _frad_stat
333 {
334 char flags;
335 struct _dlci_stat dlcis[SDLA_MAX_DLCI];
336 };
337
338 static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int len, void *data)
339 {
340 struct _dlci_stat *pstatus;
341 short *pdlci;
342 int i;
343 char *state, line[30];
344
345 switch (ret)
346 {
347 case SDLA_RET_MODEM:
348 state = data;
349 if (*state & SDLA_MODEM_DCD_LOW)
350 netdev_info(dev, "Modem DCD unexpectedly low!\n");
351 if (*state & SDLA_MODEM_CTS_LOW)
352 netdev_info(dev, "Modem CTS unexpectedly low!\n");
353 /* I should probably do something about this! */
354 break;
355
356 case SDLA_RET_CHANNEL_OFF:
357 netdev_info(dev, "Channel became inoperative!\n");
358 /* same here */
359 break;
360
361 case SDLA_RET_CHANNEL_ON:
362 netdev_info(dev, "Channel became operative!\n");
363 /* same here */
364 break;
365
366 case SDLA_RET_DLCI_STATUS:
367 netdev_info(dev, "Status change reported by Access Node\n");
368 len /= sizeof(struct _dlci_stat);
369 for(pstatus = data, i=0;i < len;i++,pstatus++)
370 {
371 if (pstatus->flags & SDLA_DLCI_NEW)
372 state = "new";
373 else if (pstatus->flags & SDLA_DLCI_DELETED)
374 state = "deleted";
375 else if (pstatus->flags & SDLA_DLCI_ACTIVE)
376 state = "active";
377 else
378 {
379 sprintf(line, "unknown status: %02X", pstatus->flags);
380 state = line;
381 }
382 netdev_info(dev, "DLCI %i: %s\n",
383 pstatus->dlci, state);
384 /* same here */
385 }
386 break;
387
388 case SDLA_RET_DLCI_UNKNOWN:
389 netdev_info(dev, "Received unknown DLCIs:");
390 len /= sizeof(short);
391 for(pdlci = data,i=0;i < len;i++,pdlci++)
392 pr_cont(" %i", *pdlci);
393 pr_cont("\n");
394 break;
395
396 case SDLA_RET_TIMEOUT:
397 netdev_err(dev, "Command timed out!\n");
398 break;
399
400 case SDLA_RET_BUF_OVERSIZE:
401 netdev_info(dev, "Bc/CIR overflow, acceptable size is %i\n",
402 len);
403 break;
404
405 case SDLA_RET_BUF_TOO_BIG:
406 netdev_info(dev, "Buffer size over specified max of %i\n",
407 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 /* Else, fall through */
417
418 default:
419 netdev_dbg(dev, "Cmd 0x%02X generated return code 0x%02X\n",
420 cmd, ret);
421 /* Further processing could be done here */
422 break;
423 }
424 }
425
426 static int sdla_cmd(struct net_device *dev, int cmd, short dlci, short flags,
427 void *inbuf, short inlen, void *outbuf, short *outlen)
428 {
429 static struct _frad_stat status;
430 struct frad_local *flp;
431 struct sdla_cmd *cmd_buf;
432 unsigned long pflags;
433 unsigned long jiffs;
434 int ret, waiting, len;
435 long window;
436
437 flp = netdev_priv(dev);
438 window = flp->type == SDLA_S508 ? SDLA_508_CMD_BUF : SDLA_502_CMD_BUF;
439 cmd_buf = (struct sdla_cmd *)(dev->mem_start + (window & SDLA_ADDR_MASK));
440 ret = 0;
441 len = 0;
442 jiffs = jiffies + HZ; /* 1 second is plenty */
443
444 spin_lock_irqsave(&sdla_lock, pflags);
445 SDLA_WINDOW(dev, window);
446 cmd_buf->cmd = cmd;
447 cmd_buf->dlci = dlci;
448 cmd_buf->flags = flags;
449
450 if (inbuf)
451 memcpy(cmd_buf->data, inbuf, inlen);
452
453 cmd_buf->length = inlen;
454
455 cmd_buf->opp_flag = 1;
456 spin_unlock_irqrestore(&sdla_lock, pflags);
457
458 waiting = 1;
459 len = 0;
460 while (waiting && time_before_eq(jiffies, jiffs))
461 {
462 if (waiting++ % 3)
463 {
464 spin_lock_irqsave(&sdla_lock, pflags);
465 SDLA_WINDOW(dev, window);
466 waiting = ((volatile int)(cmd_buf->opp_flag));
467 spin_unlock_irqrestore(&sdla_lock, pflags);
468 }
469 }
470
471 if (!waiting)
472 {
473
474 spin_lock_irqsave(&sdla_lock, pflags);
475 SDLA_WINDOW(dev, window);
476 ret = cmd_buf->retval;
477 len = cmd_buf->length;
478 if (outbuf && outlen)
479 {
480 *outlen = *outlen >= len ? len : *outlen;
481
482 if (*outlen)
483 memcpy(outbuf, cmd_buf->data, *outlen);
484 }
485
486 /* This is a local copy that's used for error handling */
487 if (ret)
488 memcpy(&status, cmd_buf->data, len > sizeof(status) ? sizeof(status) : len);
489
490 spin_unlock_irqrestore(&sdla_lock, pflags);
491 }
492 else
493 ret = SDLA_RET_TIMEOUT;
494
495 if (ret != SDLA_RET_OK)
496 sdla_errors(dev, cmd, dlci, ret, len, &status);
497
498 return ret;
499 }
500
501 /***********************************************
502 *
503 * these functions are called by the DLCI driver
504 *
505 ***********************************************/
506
507 static int sdla_reconfig(struct net_device *dev);
508
509 static int sdla_activate(struct net_device *slave, struct net_device *master)
510 {
511 struct frad_local *flp;
512 int i;
513
514 flp = netdev_priv(slave);
515
516 for(i=0;i<CONFIG_DLCI_MAX;i++)
517 if (flp->master[i] == master)
518 break;
519
520 if (i == CONFIG_DLCI_MAX)
521 return -ENODEV;
522
523 flp->dlci[i] = abs(flp->dlci[i]);
524
525 if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
526 sdla_cmd(slave, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
527
528 return 0;
529 }
530
531 static int sdla_deactivate(struct net_device *slave, struct net_device *master)
532 {
533 struct frad_local *flp;
534 int i;
535
536 flp = netdev_priv(slave);
537
538 for(i=0;i<CONFIG_DLCI_MAX;i++)
539 if (flp->master[i] == master)
540 break;
541
542 if (i == CONFIG_DLCI_MAX)
543 return -ENODEV;
544
545 flp->dlci[i] = -abs(flp->dlci[i]);
546
547 if (netif_running(slave) && (flp->config.station == FRAD_STATION_NODE))
548 sdla_cmd(slave, SDLA_DEACTIVATE_DLCI, 0, 0, &flp->dlci[i], sizeof(short), NULL, NULL);
549
550 return 0;
551 }
552
553 static int sdla_assoc(struct net_device *slave, struct net_device *master)
554 {
555 struct frad_local *flp;
556 int i;
557
558 if (master->type != ARPHRD_DLCI)
559 return -EINVAL;
560
561 flp = netdev_priv(slave);
562
563 for(i=0;i<CONFIG_DLCI_MAX;i++)
564 {
565 if (!flp->master[i])
566 break;
567 if (abs(flp->dlci[i]) == *(short *)(master->dev_addr))
568 return -EADDRINUSE;
569 }
570
571 if (i == CONFIG_DLCI_MAX)
572 return -EMLINK; /* #### Alan: Comments on this ?? */
573
574
575 flp->master[i] = master;
576 flp->dlci[i] = -*(short *)(master->dev_addr);
577 master->mtu = slave->mtu;
578
579 if (netif_running(slave)) {
580 if (flp->config.station == FRAD_STATION_CPE)
581 sdla_reconfig(slave);
582 else
583 sdla_cmd(slave, SDLA_ADD_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
584 }
585
586 return 0;
587 }
588
589 static int sdla_deassoc(struct net_device *slave, struct net_device *master)
590 {
591 struct frad_local *flp;
592 int i;
593
594 flp = netdev_priv(slave);
595
596 for(i=0;i<CONFIG_DLCI_MAX;i++)
597 if (flp->master[i] == master)
598 break;
599
600 if (i == CONFIG_DLCI_MAX)
601 return -ENODEV;
602
603 flp->master[i] = NULL;
604 flp->dlci[i] = 0;
605
606
607 if (netif_running(slave)) {
608 if (flp->config.station == FRAD_STATION_CPE)
609 sdla_reconfig(slave);
610 else
611 sdla_cmd(slave, SDLA_DELETE_DLCI, 0, 0, master->dev_addr, sizeof(short), NULL, NULL);
612 }
613
614 return 0;
615 }
616
617 static int sdla_dlci_conf(struct net_device *slave, struct net_device *master, int get)
618 {
619 struct frad_local *flp;
620 struct dlci_local *dlp;
621 int i;
622 short len, ret;
623
624 flp = netdev_priv(slave);
625
626 for(i=0;i<CONFIG_DLCI_MAX;i++)
627 if (flp->master[i] == master)
628 break;
629
630 if (i == CONFIG_DLCI_MAX)
631 return -ENODEV;
632
633 dlp = netdev_priv(master);
634
635 ret = SDLA_RET_OK;
636 len = sizeof(struct dlci_conf);
637 if (netif_running(slave)) {
638 if (get)
639 ret = sdla_cmd(slave, SDLA_READ_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
640 NULL, 0, &dlp->config, &len);
641 else
642 ret = sdla_cmd(slave, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0,
643 &dlp->config, sizeof(struct dlci_conf) - 4 * sizeof(short), NULL, NULL);
644 }
645
646 return ret == SDLA_RET_OK ? 0 : -EIO;
647 }
648
649 /**************************
650 *
651 * now for the Linux driver
652 *
653 **************************/
654
655 /* NOTE: the DLCI driver deals with freeing the SKB!! */
656 static netdev_tx_t sdla_transmit(struct sk_buff *skb,
657 struct net_device *dev)
658 {
659 struct frad_local *flp;
660 int ret, addr, accept, i;
661 short size;
662 unsigned long flags;
663 struct buf_entry *pbuf;
664
665 flp = netdev_priv(dev);
666 ret = 0;
667 accept = 1;
668
669 netif_stop_queue(dev);
670
671 /*
672 * stupid GateD insists on setting up the multicast router thru us
673 * and we're ill equipped to handle a non Frame Relay packet at this
674 * time!
675 */
676
677 accept = 1;
678 switch (dev->type)
679 {
680 case ARPHRD_FRAD:
681 if (skb->dev->type != ARPHRD_DLCI)
682 {
683 netdev_warn(dev, "Non DLCI device, type %i, tried to send on FRAD module\n",
684 skb->dev->type);
685 accept = 0;
686 }
687 break;
688 default:
689 netdev_warn(dev, "unknown firmware type 0x%04X\n",
690 dev->type);
691 accept = 0;
692 break;
693 }
694 if (accept)
695 {
696 /* this is frame specific, but till there's a PPP module, it's the default */
697 switch (flp->type)
698 {
699 case SDLA_S502A:
700 case SDLA_S502E:
701 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, skb->data, skb->len, NULL, NULL);
702 break;
703 case SDLA_S508:
704 size = sizeof(addr);
705 ret = sdla_cmd(dev, SDLA_INFORMATION_WRITE, *(short *)(skb->dev->dev_addr), 0, NULL, skb->len, &addr, &size);
706 if (ret == SDLA_RET_OK)
707 {
708
709 spin_lock_irqsave(&sdla_lock, flags);
710 SDLA_WINDOW(dev, addr);
711 pbuf = (void *)(dev->mem_start + (addr & SDLA_ADDR_MASK));
712 __sdla_write(dev, pbuf->buf_addr, skb->data, skb->len);
713 SDLA_WINDOW(dev, addr);
714 pbuf->opp_flag = 1;
715 spin_unlock_irqrestore(&sdla_lock, flags);
716 }
717 break;
718 }
719
720 switch (ret)
721 {
722 case SDLA_RET_OK:
723 dev->stats.tx_packets++;
724 break;
725
726 case SDLA_RET_CIR_OVERFLOW:
727 case SDLA_RET_BUF_OVERSIZE:
728 case SDLA_RET_NO_BUFS:
729 dev->stats.tx_dropped++;
730 break;
731
732 default:
733 dev->stats.tx_errors++;
734 break;
735 }
736 }
737 netif_wake_queue(dev);
738 for(i=0;i<CONFIG_DLCI_MAX;i++)
739 {
740 if(flp->master[i]!=NULL)
741 netif_wake_queue(flp->master[i]);
742 }
743
744 dev_kfree_skb(skb);
745 return NETDEV_TX_OK;
746 }
747
748 static void sdla_receive(struct net_device *dev)
749 {
750 struct net_device *master;
751 struct frad_local *flp;
752 struct dlci_local *dlp;
753 struct sk_buff *skb;
754
755 struct sdla_cmd *cmd;
756 struct buf_info *pbufi;
757 struct buf_entry *pbuf;
758
759 unsigned long flags;
760 int i=0, received, success, addr, buf_base, buf_top;
761 short dlci, len, len2, split;
762
763 flp = netdev_priv(dev);
764 success = 1;
765 received = addr = buf_top = buf_base = 0;
766 len = dlci = 0;
767 skb = NULL;
768 master = NULL;
769 cmd = NULL;
770 pbufi = NULL;
771 pbuf = NULL;
772
773 spin_lock_irqsave(&sdla_lock, flags);
774
775 switch (flp->type)
776 {
777 case SDLA_S502A:
778 case SDLA_S502E:
779 cmd = (void *) (dev->mem_start + (SDLA_502_RCV_BUF & SDLA_ADDR_MASK));
780 SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
781 success = cmd->opp_flag;
782 if (!success)
783 break;
784
785 dlci = cmd->dlci;
786 len = cmd->length;
787 break;
788
789 case SDLA_S508:
790 pbufi = (void *) (dev->mem_start + (SDLA_508_RXBUF_INFO & SDLA_ADDR_MASK));
791 SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
792 pbuf = (void *) (dev->mem_start + ((pbufi->rse_base + flp->buffer * sizeof(struct buf_entry)) & SDLA_ADDR_MASK));
793 success = pbuf->opp_flag;
794 if (!success)
795 break;
796
797 buf_top = pbufi->buf_top;
798 buf_base = pbufi->buf_base;
799 dlci = pbuf->dlci;
800 len = pbuf->length;
801 addr = pbuf->buf_addr;
802 break;
803 }
804
805 /* common code, find the DLCI and get the SKB */
806 if (success)
807 {
808 for (i=0;i<CONFIG_DLCI_MAX;i++)
809 if (flp->dlci[i] == dlci)
810 break;
811
812 if (i == CONFIG_DLCI_MAX)
813 {
814 netdev_notice(dev, "Received packet from invalid DLCI %i, ignoring\n",
815 dlci);
816 dev->stats.rx_errors++;
817 success = 0;
818 }
819 }
820
821 if (success)
822 {
823 master = flp->master[i];
824 skb = dev_alloc_skb(len + sizeof(struct frhdr));
825 if (skb == NULL)
826 {
827 netdev_notice(dev, "Memory squeeze, dropping packet\n");
828 dev->stats.rx_dropped++;
829 success = 0;
830 }
831 else
832 skb_reserve(skb, sizeof(struct frhdr));
833 }
834
835 /* pick up the data */
836 switch (flp->type)
837 {
838 case SDLA_S502A:
839 case SDLA_S502E:
840 if (success)
841 __sdla_read(dev, SDLA_502_RCV_BUF + SDLA_502_DATA_OFS, skb_put(skb,len), len);
842
843 SDLA_WINDOW(dev, SDLA_502_RCV_BUF);
844 cmd->opp_flag = 0;
845 break;
846
847 case SDLA_S508:
848 if (success)
849 {
850 /* is this buffer split off the end of the internal ring buffer */
851 split = addr + len > buf_top + 1 ? len - (buf_top - addr + 1) : 0;
852 len2 = len - split;
853
854 __sdla_read(dev, addr, skb_put(skb, len2), len2);
855 if (split)
856 __sdla_read(dev, buf_base, skb_put(skb, split), split);
857 }
858
859 /* increment the buffer we're looking at */
860 SDLA_WINDOW(dev, SDLA_508_RXBUF_INFO);
861 flp->buffer = (flp->buffer + 1) % pbufi->rse_num;
862 pbuf->opp_flag = 0;
863 break;
864 }
865
866 if (success)
867 {
868 dev->stats.rx_packets++;
869 dlp = netdev_priv(master);
870 (*dlp->receive)(skb, master);
871 }
872
873 spin_unlock_irqrestore(&sdla_lock, flags);
874 }
875
876 static irqreturn_t sdla_isr(int dummy, void *dev_id)
877 {
878 struct net_device *dev;
879 struct frad_local *flp;
880 char byte;
881
882 dev = dev_id;
883
884 flp = netdev_priv(dev);
885
886 if (!flp->initialized)
887 {
888 netdev_warn(dev, "irq %d for uninitialized device\n", dev->irq);
889 return IRQ_NONE;
890 }
891
892 byte = sdla_byte(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE);
893 switch (byte)
894 {
895 case SDLA_INTR_RX:
896 sdla_receive(dev);
897 break;
898
899 /* the command will get an error return, which is processed above */
900 case SDLA_INTR_MODEM:
901 case SDLA_INTR_STATUS:
902 sdla_cmd(dev, SDLA_READ_DLC_STATUS, 0, 0, NULL, 0, NULL, NULL);
903 break;
904
905 case SDLA_INTR_TX:
906 case SDLA_INTR_COMPLETE:
907 case SDLA_INTR_TIMER:
908 netdev_warn(dev, "invalid irq flag 0x%02X\n", byte);
909 break;
910 }
911
912 /* the S502E requires a manual acknowledgement of the interrupt */
913 if (flp->type == SDLA_S502E)
914 {
915 flp->state &= ~SDLA_S502E_INTACK;
916 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
917 flp->state |= SDLA_S502E_INTACK;
918 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
919 }
920
921 /* this clears the byte, informing the Z80 we're done */
922 byte = 0;
923 sdla_write(dev, flp->type == SDLA_S508 ? SDLA_508_IRQ_INTERFACE : SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
924 return IRQ_HANDLED;
925 }
926
927 static void sdla_poll(struct timer_list *t)
928 {
929 struct frad_local *flp = from_timer(flp, t, timer);
930 struct net_device *dev = flp->dev;
931
932 if (sdla_byte(dev, SDLA_502_RCV_BUF))
933 sdla_receive(dev);
934
935 flp->timer.expires = 1;
936 add_timer(&flp->timer);
937 }
938
939 static int sdla_close(struct net_device *dev)
940 {
941 struct frad_local *flp;
942 struct intr_info intr;
943 int len, i;
944 short dlcis[CONFIG_DLCI_MAX];
945
946 flp = netdev_priv(dev);
947
948 len = 0;
949 for(i=0;i<CONFIG_DLCI_MAX;i++)
950 if (flp->dlci[i])
951 dlcis[len++] = abs(flp->dlci[i]);
952 len *= 2;
953
954 if (flp->config.station == FRAD_STATION_NODE)
955 {
956 for(i=0;i<CONFIG_DLCI_MAX;i++)
957 if (flp->dlci[i] > 0)
958 sdla_cmd(dev, SDLA_DEACTIVATE_DLCI, 0, 0, dlcis, len, NULL, NULL);
959 sdla_cmd(dev, SDLA_DELETE_DLCI, 0, 0, &flp->dlci[i], sizeof(flp->dlci[i]), NULL, NULL);
960 }
961
962 memset(&intr, 0, sizeof(intr));
963 /* let's start up the reception */
964 switch(flp->type)
965 {
966 case SDLA_S502A:
967 del_timer(&flp->timer);
968 break;
969
970 case SDLA_S502E:
971 sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
972 flp->state &= ~SDLA_S502E_INTACK;
973 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
974 break;
975
976 case SDLA_S507:
977 break;
978
979 case SDLA_S508:
980 sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
981 flp->state &= ~SDLA_S508_INTEN;
982 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
983 break;
984 }
985
986 sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
987
988 netif_stop_queue(dev);
989
990 return 0;
991 }
992
993 struct conf_data {
994 struct frad_conf config;
995 short dlci[CONFIG_DLCI_MAX];
996 };
997
998 static int sdla_open(struct net_device *dev)
999 {
1000 struct frad_local *flp;
1001 struct dlci_local *dlp;
1002 struct conf_data data;
1003 struct intr_info intr;
1004 int len, i;
1005 char byte;
1006
1007 flp = netdev_priv(dev);
1008
1009 if (!flp->initialized)
1010 return -EPERM;
1011
1012 if (!flp->configured)
1013 return -EPERM;
1014
1015 /* time to send in the configuration */
1016 len = 0;
1017 for(i=0;i<CONFIG_DLCI_MAX;i++)
1018 if (flp->dlci[i])
1019 data.dlci[len++] = abs(flp->dlci[i]);
1020 len *= 2;
1021
1022 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1023 len += sizeof(struct frad_conf);
1024
1025 sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1026 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1027
1028 if (flp->type == SDLA_S508)
1029 flp->buffer = 0;
1030
1031 sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1032
1033 /* let's start up the reception */
1034 memset(&intr, 0, sizeof(intr));
1035 switch(flp->type)
1036 {
1037 case SDLA_S502A:
1038 flp->timer.expires = 1;
1039 add_timer(&flp->timer);
1040 break;
1041
1042 case SDLA_S502E:
1043 flp->state |= SDLA_S502E_ENABLE;
1044 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1045 flp->state |= SDLA_S502E_INTACK;
1046 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1047 byte = 0;
1048 sdla_write(dev, SDLA_502_IRQ_INTERFACE, &byte, sizeof(byte));
1049 intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1050 sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(char) + sizeof(short), NULL, NULL);
1051 break;
1052
1053 case SDLA_S507:
1054 break;
1055
1056 case SDLA_S508:
1057 flp->state |= SDLA_S508_INTEN;
1058 outb(flp->state, dev->base_addr + SDLA_REG_CONTROL);
1059 byte = 0;
1060 sdla_write(dev, SDLA_508_IRQ_INTERFACE, &byte, sizeof(byte));
1061 intr.flags = SDLA_INTR_RX | SDLA_INTR_STATUS | SDLA_INTR_MODEM;
1062 intr.irq = dev->irq;
1063 sdla_cmd(dev, SDLA_SET_IRQ_TRIGGER, 0, 0, &intr, sizeof(struct intr_info), NULL, NULL);
1064 break;
1065 }
1066
1067 if (flp->config.station == FRAD_STATION_CPE)
1068 {
1069 byte = SDLA_ICS_STATUS_ENQ;
1070 sdla_cmd(dev, SDLA_ISSUE_IN_CHANNEL_SIGNAL, 0, 0, &byte, sizeof(byte), NULL, NULL);
1071 }
1072 else
1073 {
1074 sdla_cmd(dev, SDLA_ADD_DLCI, 0, 0, data.dlci, len - sizeof(struct frad_conf), NULL, NULL);
1075 for(i=0;i<CONFIG_DLCI_MAX;i++)
1076 if (flp->dlci[i] > 0)
1077 sdla_cmd(dev, SDLA_ACTIVATE_DLCI, 0, 0, &flp->dlci[i], 2*sizeof(flp->dlci[i]), NULL, NULL);
1078 }
1079
1080 /* configure any specific DLCI settings */
1081 for(i=0;i<CONFIG_DLCI_MAX;i++)
1082 if (flp->dlci[i])
1083 {
1084 dlp = netdev_priv(flp->master[i]);
1085 if (dlp->configured)
1086 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, abs(flp->dlci[i]), 0, &dlp->config, sizeof(struct dlci_conf), NULL, NULL);
1087 }
1088
1089 netif_start_queue(dev);
1090
1091 return 0;
1092 }
1093
1094 static int sdla_config(struct net_device *dev, struct frad_conf __user *conf, int get)
1095 {
1096 struct frad_local *flp;
1097 struct conf_data data;
1098 int i;
1099 short size;
1100
1101 if (dev->type == 0xFFFF)
1102 return -EUNATCH;
1103
1104 flp = netdev_priv(dev);
1105
1106 if (!get)
1107 {
1108 if (netif_running(dev))
1109 return -EBUSY;
1110
1111 if(copy_from_user(&data.config, conf, sizeof(struct frad_conf)))
1112 return -EFAULT;
1113
1114 if (data.config.station & ~FRAD_STATION_NODE)
1115 return -EINVAL;
1116
1117 if (data.config.flags & ~FRAD_VALID_FLAGS)
1118 return -EINVAL;
1119
1120 if ((data.config.kbaud < 0) ||
1121 ((data.config.kbaud > 128) && (flp->type != SDLA_S508)))
1122 return -EINVAL;
1123
1124 if (data.config.clocking & ~(FRAD_CLOCK_INT | SDLA_S508_PORT_RS232))
1125 return -EINVAL;
1126
1127 if ((data.config.mtu < 0) || (data.config.mtu > SDLA_MAX_MTU))
1128 return -EINVAL;
1129
1130 if ((data.config.T391 < 5) || (data.config.T391 > 30))
1131 return -EINVAL;
1132
1133 if ((data.config.T392 < 5) || (data.config.T392 > 30))
1134 return -EINVAL;
1135
1136 if ((data.config.N391 < 1) || (data.config.N391 > 255))
1137 return -EINVAL;
1138
1139 if ((data.config.N392 < 1) || (data.config.N392 > 10))
1140 return -EINVAL;
1141
1142 if ((data.config.N393 < 1) || (data.config.N393 > 10))
1143 return -EINVAL;
1144
1145 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1146 flp->config.flags |= SDLA_DIRECT_RECV;
1147
1148 if (flp->type == SDLA_S508)
1149 flp->config.flags |= SDLA_TX70_RX30;
1150
1151 if (dev->mtu != flp->config.mtu)
1152 {
1153 /* this is required to change the MTU */
1154 dev->mtu = flp->config.mtu;
1155 for(i=0;i<CONFIG_DLCI_MAX;i++)
1156 if (flp->master[i])
1157 flp->master[i]->mtu = flp->config.mtu;
1158 }
1159
1160 flp->config.mtu += sizeof(struct frhdr);
1161
1162 /* off to the races! */
1163 if (!flp->configured)
1164 sdla_start(dev);
1165
1166 flp->configured = 1;
1167 }
1168 else
1169 {
1170 /* no sense reading if the CPU isn't started */
1171 if (netif_running(dev))
1172 {
1173 size = sizeof(data);
1174 if (sdla_cmd(dev, SDLA_READ_DLCI_CONFIGURATION, 0, 0, NULL, 0, &data, &size) != SDLA_RET_OK)
1175 return -EIO;
1176 }
1177 else
1178 if (flp->configured)
1179 memcpy(&data.config, &flp->config, sizeof(struct frad_conf));
1180 else
1181 memset(&data.config, 0, sizeof(struct frad_conf));
1182
1183 memcpy(&flp->config, &data.config, sizeof(struct frad_conf));
1184 data.config.flags &= FRAD_VALID_FLAGS;
1185 data.config.mtu -= data.config.mtu > sizeof(struct frhdr) ? sizeof(struct frhdr) : data.config.mtu;
1186 return copy_to_user(conf, &data.config, sizeof(struct frad_conf))?-EFAULT:0;
1187 }
1188
1189 return 0;
1190 }
1191
1192 static int sdla_xfer(struct net_device *dev, struct sdla_mem __user *info, int read)
1193 {
1194 struct sdla_mem mem;
1195 char *temp;
1196
1197 if(copy_from_user(&mem, info, sizeof(mem)))
1198 return -EFAULT;
1199
1200 if (read)
1201 {
1202 temp = kzalloc(mem.len, GFP_KERNEL);
1203 if (!temp)
1204 return -ENOMEM;
1205 sdla_read(dev, mem.addr, temp, mem.len);
1206 if(copy_to_user(mem.data, temp, mem.len))
1207 {
1208 kfree(temp);
1209 return -EFAULT;
1210 }
1211 kfree(temp);
1212 }
1213 else
1214 {
1215 temp = memdup_user(mem.data, mem.len);
1216 if (IS_ERR(temp))
1217 return PTR_ERR(temp);
1218 sdla_write(dev, mem.addr, temp, mem.len);
1219 kfree(temp);
1220 }
1221 return 0;
1222 }
1223
1224 static int sdla_reconfig(struct net_device *dev)
1225 {
1226 struct frad_local *flp;
1227 struct conf_data data;
1228 int i, len;
1229
1230 flp = netdev_priv(dev);
1231
1232 len = 0;
1233 for(i=0;i<CONFIG_DLCI_MAX;i++)
1234 if (flp->dlci[i])
1235 data.dlci[len++] = flp->dlci[i];
1236 len *= 2;
1237
1238 memcpy(&data, &flp->config, sizeof(struct frad_conf));
1239 len += sizeof(struct frad_conf);
1240
1241 sdla_cmd(dev, SDLA_DISABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1242 sdla_cmd(dev, SDLA_SET_DLCI_CONFIGURATION, 0, 0, &data, len, NULL, NULL);
1243 sdla_cmd(dev, SDLA_ENABLE_COMMUNICATIONS, 0, 0, NULL, 0, NULL, NULL);
1244
1245 return 0;
1246 }
1247
1248 static int sdla_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1249 {
1250 struct frad_local *flp;
1251
1252 if(!capable(CAP_NET_ADMIN))
1253 return -EPERM;
1254
1255 flp = netdev_priv(dev);
1256
1257 if (!flp->initialized)
1258 return -EINVAL;
1259
1260 switch (cmd)
1261 {
1262 case FRAD_GET_CONF:
1263 case FRAD_SET_CONF:
1264 return sdla_config(dev, ifr->ifr_data, cmd == FRAD_GET_CONF);
1265
1266 case SDLA_IDENTIFY:
1267 ifr->ifr_flags = flp->type;
1268 break;
1269
1270 case SDLA_CPUSPEED:
1271 return sdla_cpuspeed(dev, ifr);
1272
1273 /* ==========================================================
1274 NOTE: This is rather a useless action right now, as the
1275 current driver does not support protocols other than
1276 FR. However, Sangoma has modules for a number of
1277 other protocols in the works.
1278 ============================================================*/
1279 case SDLA_PROTOCOL:
1280 if (flp->configured)
1281 return -EALREADY;
1282
1283 switch (ifr->ifr_flags)
1284 {
1285 case ARPHRD_FRAD:
1286 dev->type = ifr->ifr_flags;
1287 break;
1288 default:
1289 return -ENOPROTOOPT;
1290 }
1291 break;
1292
1293 case SDLA_CLEARMEM:
1294 sdla_clear(dev);
1295 break;
1296
1297 case SDLA_WRITEMEM:
1298 case SDLA_READMEM:
1299 if(!capable(CAP_SYS_RAWIO))
1300 return -EPERM;
1301 return sdla_xfer(dev, ifr->ifr_data, cmd == SDLA_READMEM);
1302
1303 case SDLA_START:
1304 sdla_start(dev);
1305 break;
1306
1307 case SDLA_STOP:
1308 sdla_stop(dev);
1309 break;
1310
1311 default:
1312 return -EOPNOTSUPP;
1313 }
1314 return 0;
1315 }
1316
1317 static int sdla_change_mtu(struct net_device *dev, int new_mtu)
1318 {
1319 if (netif_running(dev))
1320 return -EBUSY;
1321
1322 /* for now, you can't change the MTU! */
1323 return -EOPNOTSUPP;
1324 }
1325
1326 static int sdla_set_config(struct net_device *dev, struct ifmap *map)
1327 {
1328 struct frad_local *flp;
1329 int i;
1330 char byte;
1331 unsigned base;
1332 int err = -EINVAL;
1333
1334 flp = netdev_priv(dev);
1335
1336 if (flp->initialized)
1337 return -EINVAL;
1338
1339 for(i=0; i < ARRAY_SIZE(valid_port); i++)
1340 if (valid_port[i] == map->base_addr)
1341 break;
1342
1343 if (i == ARRAY_SIZE(valid_port))
1344 return -EINVAL;
1345
1346 if (!request_region(map->base_addr, SDLA_IO_EXTENTS, dev->name)){
1347 pr_warn("io-port 0x%04lx in use\n", dev->base_addr);
1348 return -EINVAL;
1349 }
1350 base = map->base_addr;
1351
1352 /* test for card types, S502A, S502E, S507, S508 */
1353 /* these tests shut down the card completely, so clear the state */
1354 flp->type = SDLA_UNKNOWN;
1355 flp->state = 0;
1356
1357 for(i=1;i<SDLA_IO_EXTENTS;i++)
1358 if (inb(base + i) != 0xFF)
1359 break;
1360
1361 if (i == SDLA_IO_EXTENTS) {
1362 outb(SDLA_HALT, base + SDLA_REG_Z80_CONTROL);
1363 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x08) {
1364 outb(SDLA_S502E_INTACK, base + SDLA_REG_CONTROL);
1365 if ((inb(base + SDLA_S502_STS) & 0x0F) == 0x0C) {
1366 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1367 flp->type = SDLA_S502E;
1368 goto got_type;
1369 }
1370 }
1371 }
1372
1373 for(byte=inb(base),i=0;i<SDLA_IO_EXTENTS;i++)
1374 if (inb(base + i) != byte)
1375 break;
1376
1377 if (i == SDLA_IO_EXTENTS) {
1378 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1379 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x30) {
1380 outb(SDLA_S507_ENABLE, base + SDLA_REG_CONTROL);
1381 if ((inb(base + SDLA_S502_STS) & 0x7E) == 0x32) {
1382 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1383 flp->type = SDLA_S507;
1384 goto got_type;
1385 }
1386 }
1387 }
1388
1389 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1390 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x00) {
1391 outb(SDLA_S508_INTEN, base + SDLA_REG_CONTROL);
1392 if ((inb(base + SDLA_S508_STS) & 0x3F) == 0x10) {
1393 outb(SDLA_HALT, base + SDLA_REG_CONTROL);
1394 flp->type = SDLA_S508;
1395 goto got_type;
1396 }
1397 }
1398
1399 outb(SDLA_S502A_HALT, base + SDLA_REG_CONTROL);
1400 if (inb(base + SDLA_S502_STS) == 0x40) {
1401 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1402 if (inb(base + SDLA_S502_STS) == 0x40) {
1403 outb(SDLA_S502A_INTEN, base + SDLA_REG_CONTROL);
1404 if (inb(base + SDLA_S502_STS) == 0x44) {
1405 outb(SDLA_S502A_START, base + SDLA_REG_CONTROL);
1406 flp->type = SDLA_S502A;
1407 goto got_type;
1408 }
1409 }
1410 }
1411
1412 netdev_notice(dev, "Unknown card type\n");
1413 err = -ENODEV;
1414 goto fail;
1415
1416 got_type:
1417 switch(base) {
1418 case 0x270:
1419 case 0x280:
1420 case 0x380:
1421 case 0x390:
1422 if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1423 goto fail;
1424 }
1425
1426 switch (map->irq) {
1427 case 2:
1428 if (flp->type != SDLA_S502E)
1429 goto fail;
1430 break;
1431
1432 case 10:
1433 case 11:
1434 case 12:
1435 case 15:
1436 case 4:
1437 if (flp->type != SDLA_S508 && flp->type != SDLA_S507)
1438 goto fail;
1439 break;
1440 case 3:
1441 case 5:
1442 case 7:
1443 if (flp->type == SDLA_S502A)
1444 goto fail;
1445 break;
1446
1447 default:
1448 goto fail;
1449 }
1450
1451 err = -EAGAIN;
1452 if (request_irq(dev->irq, sdla_isr, 0, dev->name, dev))
1453 goto fail;
1454
1455 if (flp->type == SDLA_S507) {
1456 switch(dev->irq) {
1457 case 3:
1458 flp->state = SDLA_S507_IRQ3;
1459 break;
1460 case 4:
1461 flp->state = SDLA_S507_IRQ4;
1462 break;
1463 case 5:
1464 flp->state = SDLA_S507_IRQ5;
1465 break;
1466 case 7:
1467 flp->state = SDLA_S507_IRQ7;
1468 break;
1469 case 10:
1470 flp->state = SDLA_S507_IRQ10;
1471 break;
1472 case 11:
1473 flp->state = SDLA_S507_IRQ11;
1474 break;
1475 case 12:
1476 flp->state = SDLA_S507_IRQ12;
1477 break;
1478 case 15:
1479 flp->state = SDLA_S507_IRQ15;
1480 break;
1481 }
1482 }
1483
1484 for(i=0; i < ARRAY_SIZE(valid_mem); i++)
1485 if (valid_mem[i] == map->mem_start)
1486 break;
1487
1488 err = -EINVAL;
1489 if (i == ARRAY_SIZE(valid_mem))
1490 goto fail2;
1491
1492 if (flp->type == SDLA_S502A && (map->mem_start & 0xF000) >> 12 == 0x0E)
1493 goto fail2;
1494
1495 if (flp->type != SDLA_S507 && map->mem_start >> 16 == 0x0B)
1496 goto fail2;
1497
1498 if (flp->type == SDLA_S507 && map->mem_start >> 16 == 0x0D)
1499 goto fail2;
1500
1501 byte = flp->type != SDLA_S508 ? SDLA_8K_WINDOW : 0;
1502 byte |= (map->mem_start & 0xF000) >> (12 + (flp->type == SDLA_S508 ? 1 : 0));
1503 switch(flp->type) {
1504 case SDLA_S502A:
1505 case SDLA_S502E:
1506 switch (map->mem_start >> 16) {
1507 case 0x0A:
1508 byte |= SDLA_S502_SEG_A;
1509 break;
1510 case 0x0C:
1511 byte |= SDLA_S502_SEG_C;
1512 break;
1513 case 0x0D:
1514 byte |= SDLA_S502_SEG_D;
1515 break;
1516 case 0x0E:
1517 byte |= SDLA_S502_SEG_E;
1518 break;
1519 }
1520 break;
1521 case SDLA_S507:
1522 switch (map->mem_start >> 16) {
1523 case 0x0A:
1524 byte |= SDLA_S507_SEG_A;
1525 break;
1526 case 0x0B:
1527 byte |= SDLA_S507_SEG_B;
1528 break;
1529 case 0x0C:
1530 byte |= SDLA_S507_SEG_C;
1531 break;
1532 case 0x0E:
1533 byte |= SDLA_S507_SEG_E;
1534 break;
1535 }
1536 break;
1537 case SDLA_S508:
1538 switch (map->mem_start >> 16) {
1539 case 0x0A:
1540 byte |= SDLA_S508_SEG_A;
1541 break;
1542 case 0x0C:
1543 byte |= SDLA_S508_SEG_C;
1544 break;
1545 case 0x0D:
1546 byte |= SDLA_S508_SEG_D;
1547 break;
1548 case 0x0E:
1549 byte |= SDLA_S508_SEG_E;
1550 break;
1551 }
1552 break;
1553 }
1554
1555 /* set the memory bits, and enable access */
1556 outb(byte, base + SDLA_REG_PC_WINDOW);
1557
1558 switch(flp->type)
1559 {
1560 case SDLA_S502E:
1561 flp->state = SDLA_S502E_ENABLE;
1562 break;
1563 case SDLA_S507:
1564 flp->state |= SDLA_MEMEN;
1565 break;
1566 case SDLA_S508:
1567 flp->state = SDLA_MEMEN;
1568 break;
1569 }
1570 outb(flp->state, base + SDLA_REG_CONTROL);
1571
1572 dev->irq = map->irq;
1573 dev->base_addr = base;
1574 dev->mem_start = map->mem_start;
1575 dev->mem_end = dev->mem_start + 0x2000;
1576 flp->initialized = 1;
1577 return 0;
1578
1579 fail2:
1580 free_irq(map->irq, dev);
1581 fail:
1582 release_region(base, SDLA_IO_EXTENTS);
1583 return err;
1584 }
1585
1586 static const struct net_device_ops sdla_netdev_ops = {
1587 .ndo_open = sdla_open,
1588 .ndo_stop = sdla_close,
1589 .ndo_do_ioctl = sdla_ioctl,
1590 .ndo_set_config = sdla_set_config,
1591 .ndo_start_xmit = sdla_transmit,
1592 .ndo_change_mtu = sdla_change_mtu,
1593 };
1594
1595 static void setup_sdla(struct net_device *dev)
1596 {
1597 struct frad_local *flp = netdev_priv(dev);
1598
1599 netdev_boot_setup_check(dev);
1600
1601 dev->netdev_ops = &sdla_netdev_ops;
1602 dev->flags = 0;
1603 dev->type = 0xFFFF;
1604 dev->hard_header_len = 0;
1605 dev->addr_len = 0;
1606 dev->mtu = SDLA_MAX_MTU;
1607
1608 flp->activate = sdla_activate;
1609 flp->deactivate = sdla_deactivate;
1610 flp->assoc = sdla_assoc;
1611 flp->deassoc = sdla_deassoc;
1612 flp->dlci_conf = sdla_dlci_conf;
1613 flp->dev = dev;
1614
1615 timer_setup(&flp->timer, sdla_poll, 0);
1616 flp->timer.expires = 1;
1617 }
1618
1619 static struct net_device *sdla;
1620
1621 static int __init init_sdla(void)
1622 {
1623 int err;
1624
1625 printk("%s.\n", version);
1626
1627 sdla = alloc_netdev(sizeof(struct frad_local), "sdla0",
1628 NET_NAME_UNKNOWN, setup_sdla);
1629 if (!sdla)
1630 return -ENOMEM;
1631
1632 err = register_netdev(sdla);
1633 if (err)
1634 free_netdev(sdla);
1635
1636 return err;
1637 }
1638
1639 static void __exit exit_sdla(void)
1640 {
1641 struct frad_local *flp = netdev_priv(sdla);
1642
1643 unregister_netdev(sdla);
1644 if (flp->initialized) {
1645 free_irq(sdla->irq, sdla);
1646 release_region(sdla->base_addr, SDLA_IO_EXTENTS);
1647 }
1648 del_timer_sync(&flp->timer);
1649 free_netdev(sdla);
1650 }
1651
1652 MODULE_LICENSE("GPL");
1653
1654 module_init(init_sdla);
1655 module_exit(exit_sdla);
Linux with added FPC-III support