1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Derived from Applicom driver ac.c for SCO Unix */
3 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */
4 /* dwmw2@infradead.org 30/8/98 */
5 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */
6 /* This module is for Linux 2.1 and 2.2 series kernels. */
7 /*****************************************************************************/
8 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */
9 /* ceci pour reseter correctement apres une sortie sauvage */
10 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */
11 /* LoopCount n'etait pas initialise a 0. */
12 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */
13 /* pour liberer le bus */
14 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
15 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */
16 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */
17 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */
18 /* addresses de base des cartes, IOCTL 6 plus complet */
19 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */
20 /* de code autre que le texte V2.6.1 en V2.8.0 */
21 /*****************************************************************************/
22
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/interrupt.h>
27 #include <linux/sched/signal.h>
28 #include <linux/slab.h>
29 #include <linux/errno.h>
30 #include <linux/mutex.h>
31 #include <linux/miscdevice.h>
32 #include <linux/pci.h>
33 #include <linux/wait.h>
34 #include <linux/init.h>
35 #include <linux/fs.h>
36 #include <linux/nospec.h>
37
38 #include <asm/io.h>
39 #include <linux/uaccess.h>
40
41 #include "applicom.h"
42
43
44 /* NOTE: We use for loops with {write,read}b() instead of
45 memcpy_{from,to}io throughout this driver. This is because
46 the board doesn't correctly handle word accesses - only
47 bytes.
48 */
49
50
51 #undef DEBUG
52
53 #define MAX_BOARD 8 /* maximum of pc board possible */
54 #define MAX_ISA_BOARD 4
55 #define LEN_RAM_IO 0x800
56
57 #ifndef PCI_VENDOR_ID_APPLICOM
58 #define PCI_VENDOR_ID_APPLICOM 0x1389
59 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
60 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
61 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
62 #endif
63
64 static DEFINE_MUTEX(ac_mutex);
65 static char *applicom_pci_devnames[] = {
66 "PCI board",
67 "PCI2000IBS / PCI2000CAN",
68 "PCI2000PFB"
69 };
70
71 static const struct pci_device_id applicom_pci_tbl[] = {
72 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
73 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
74 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
75 { 0 }
76 };
77 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
78
79 MODULE_AUTHOR("David Woodhouse & Applicom International");
80 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
81 MODULE_LICENSE("GPL");
82 MODULE_ALIAS_MISCDEV(AC_MINOR);
83
84 static struct applicom_board {
85 unsigned long PhysIO;
86 void __iomem *RamIO;
87 wait_queue_head_t FlagSleepSend;
88 long irq;
89 spinlock_t mutex;
90 } apbs[MAX_BOARD];
91
92 static unsigned int irq; /* interrupt number IRQ */
93 static unsigned long mem; /* physical segment of board */
94
95 module_param_hw(irq, uint, irq, 0);
96 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
97 module_param_hw(mem, ulong, iomem, 0);
98 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
99
100 static unsigned int numboards; /* number of installed boards */
101 static volatile unsigned char Dummy;
102 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
103 static unsigned int WriteErrorCount; /* number of write error */
104 static unsigned int ReadErrorCount; /* number of read error */
105 static unsigned int DeviceErrorCount; /* number of device error */
106
107 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
108 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
109 static long ac_ioctl(struct file *, unsigned int, unsigned long);
110 static irqreturn_t ac_interrupt(int, void *);
111
112 static const struct file_operations ac_fops = {
113 .owner = THIS_MODULE,
114 .read = ac_read,
115 .write = ac_write,
116 .unlocked_ioctl = ac_ioctl,
117 };
118
119 static struct miscdevice ac_miscdev = {
120 AC_MINOR,
121 "ac",
122 &ac_fops
123 };
124
125 static int dummy; /* dev_id for request_irq() */
126
ac_register_board(unsigned long physloc,void __iomem * loc,unsigned char boardno)127 static int ac_register_board(unsigned long physloc, void __iomem *loc,
128 unsigned char boardno)
129 {
130 volatile unsigned char byte_reset_it;
131
132 if((readb(loc + CONF_END_TEST) != 0x00) ||
133 (readb(loc + CONF_END_TEST + 1) != 0x55) ||
134 (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
135 (readb(loc + CONF_END_TEST + 3) != 0xFF))
136 return 0;
137
138 if (!boardno)
139 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
140
141 if (!boardno || boardno > MAX_BOARD) {
142 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
143 boardno, physloc, MAX_BOARD);
144 return 0;
145 }
146
147 if (apbs[boardno - 1].RamIO) {
148 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
149 boardno, physloc, boardno, apbs[boardno-1].PhysIO);
150 return 0;
151 }
152
153 boardno--;
154
155 apbs[boardno].PhysIO = physloc;
156 apbs[boardno].RamIO = loc;
157 init_waitqueue_head(&apbs[boardno].FlagSleepSend);
158 spin_lock_init(&apbs[boardno].mutex);
159 byte_reset_it = readb(loc + RAM_IT_TO_PC);
160
161 numboards++;
162 return boardno + 1;
163 }
164
applicom_exit(void)165 static void __exit applicom_exit(void)
166 {
167 unsigned int i;
168
169 misc_deregister(&ac_miscdev);
170
171 for (i = 0; i < MAX_BOARD; i++) {
172
173 if (!apbs[i].RamIO)
174 continue;
175
176 if (apbs[i].irq)
177 free_irq(apbs[i].irq, &dummy);
178
179 iounmap(apbs[i].RamIO);
180 }
181 }
182
applicom_init(void)183 static int __init applicom_init(void)
184 {
185 int i, numisa = 0;
186 struct pci_dev *dev = NULL;
187 void __iomem *RamIO;
188 int boardno, ret;
189
190 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
191
192 /* No mem and irq given - check for a PCI card */
193
194 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
195
196 if (!pci_match_id(applicom_pci_tbl, dev))
197 continue;
198
199 if (pci_enable_device(dev)) {
200 pci_dev_put(dev);
201 return -EIO;
202 }
203
204 RamIO = ioremap(pci_resource_start(dev, 0), LEN_RAM_IO);
205
206 if (!RamIO) {
207 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
208 "space at 0x%llx\n",
209 (unsigned long long)pci_resource_start(dev, 0));
210 pci_disable_device(dev);
211 pci_dev_put(dev);
212 return -EIO;
213 }
214
215 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
216 applicom_pci_devnames[dev->device-1],
217 (unsigned long long)pci_resource_start(dev, 0),
218 dev->irq);
219
220 boardno = ac_register_board(pci_resource_start(dev, 0),
221 RamIO, 0);
222 if (!boardno) {
223 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
224 iounmap(RamIO);
225 pci_disable_device(dev);
226 continue;
227 }
228
229 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
230 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
231 iounmap(RamIO);
232 pci_disable_device(dev);
233 apbs[boardno - 1].RamIO = NULL;
234 continue;
235 }
236
237 /* Enable interrupts. */
238
239 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
240
241 apbs[boardno - 1].irq = dev->irq;
242 }
243
244 /* Finished with PCI cards. If none registered,
245 * and there was no mem/irq specified, exit */
246
247 if (!mem || !irq) {
248 if (numboards)
249 goto fin;
250 else {
251 printk(KERN_INFO "ac.o: No PCI boards found.\n");
252 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
253 return -ENXIO;
254 }
255 }
256
257 /* Now try the specified ISA cards */
258
259 for (i = 0; i < MAX_ISA_BOARD; i++) {
260 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
261
262 if (!RamIO) {
263 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
264 continue;
265 }
266
267 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
268 RamIO,i+1))) {
269 iounmap(RamIO);
270 continue;
271 }
272
273 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
274
275 if (!numisa) {
276 if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
277 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
278 iounmap(RamIO);
279 apbs[boardno - 1].RamIO = NULL;
280 }
281 else
282 apbs[boardno - 1].irq = irq;
283 }
284 else
285 apbs[boardno - 1].irq = 0;
286
287 numisa++;
288 }
289
290 if (!numisa)
291 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
292 "at mem 0x%lx\n", mem);
293
294 fin:
295 init_waitqueue_head(&FlagSleepRec);
296
297 WriteErrorCount = 0;
298 ReadErrorCount = 0;
299 DeviceErrorCount = 0;
300
301 if (numboards) {
302 ret = misc_register(&ac_miscdev);
303 if (ret) {
304 printk(KERN_WARNING "ac.o: Unable to register misc device\n");
305 goto out;
306 }
307 for (i = 0; i < MAX_BOARD; i++) {
308 int serial;
309 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
310
311 if (!apbs[i].RamIO)
312 continue;
313
314 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
315 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
316
317 boardname[serial] = 0;
318
319
320 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
321 i+1, boardname,
322 (int)(readb(apbs[i].RamIO + VERS) >> 4),
323 (int)(readb(apbs[i].RamIO + VERS) & 0xF));
324
325 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
326 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
327 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
328
329 if (serial != 0)
330 printk(" S/N %d\n", serial);
331 else
332 printk("\n");
333 }
334 return 0;
335 }
336
337 else
338 return -ENXIO;
339
340 out:
341 for (i = 0; i < MAX_BOARD; i++) {
342 if (!apbs[i].RamIO)
343 continue;
344 if (apbs[i].irq)
345 free_irq(apbs[i].irq, &dummy);
346 iounmap(apbs[i].RamIO);
347 }
348 return ret;
349 }
350
351 module_init(applicom_init);
352 module_exit(applicom_exit);
353
354
ac_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)355 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
356 {
357 unsigned int NumCard; /* Board number 1 -> 8 */
358 unsigned int IndexCard; /* Index board number 0 -> 7 */
359 unsigned char TicCard; /* Board TIC to send */
360 unsigned long flags; /* Current priority */
361 struct st_ram_io st_loc;
362 struct mailbox tmpmailbox;
363 #ifdef DEBUG
364 int c;
365 #endif
366 DECLARE_WAITQUEUE(wait, current);
367
368 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
369 static int warncount = 5;
370 if (warncount) {
371 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
372 count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
373 warncount--;
374 }
375 return -EINVAL;
376 }
377
378 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
379 return -EFAULT;
380
381 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
382 sizeof(struct mailbox)))
383 return -EFAULT;
384
385 NumCard = st_loc.num_card; /* board number to send */
386 TicCard = st_loc.tic_des_from_pc; /* tic number to send */
387 IndexCard = NumCard - 1;
388
389 if (IndexCard >= MAX_BOARD)
390 return -EINVAL;
391 IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
392
393 if (!apbs[IndexCard].RamIO)
394 return -EINVAL;
395
396 #ifdef DEBUG
397 printk("Write to applicom card #%d. struct st_ram_io follows:",
398 IndexCard+1);
399
400 for (c = 0; c < sizeof(struct st_ram_io);) {
401
402 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
403
404 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
405 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
406 }
407 }
408
409 printk("\nstruct mailbox follows:");
410
411 for (c = 0; c < sizeof(struct mailbox);) {
412 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
413
414 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
415 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
416 }
417 }
418
419 printk("\n");
420 #endif
421
422 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
423
424 /* Test octet ready correct */
425 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
426 Dummy = readb(apbs[IndexCard].RamIO + VERS);
427 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
428 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
429 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
430 DeviceErrorCount++;
431 return -EIO;
432 }
433
434 /* Place ourselves on the wait queue */
435 set_current_state(TASK_INTERRUPTIBLE);
436 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
437
438 /* Check whether the card is ready for us */
439 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
440 Dummy = readb(apbs[IndexCard].RamIO + VERS);
441 /* It's busy. Sleep. */
442
443 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
444 schedule();
445 if (signal_pending(current)) {
446 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
447 &wait);
448 return -EINTR;
449 }
450 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
451 set_current_state(TASK_INTERRUPTIBLE);
452 }
453
454 /* We may not have actually slept */
455 set_current_state(TASK_RUNNING);
456 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
457
458 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
459
460 /* Which is best - lock down the pages with rawio and then
461 copy directly, or use bounce buffers? For now we do the latter
462 because it works with 2.2 still */
463 {
464 unsigned char *from = (unsigned char *) &tmpmailbox;
465 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
466 int c;
467
468 for (c = 0; c < sizeof(struct mailbox); c++)
469 writeb(*(from++), to++);
470 }
471
472 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
473 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
474 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
475 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
476 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
477 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
478 Dummy = readb(apbs[IndexCard].RamIO + VERS);
479 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
480 return 0;
481 }
482
do_ac_read(int IndexCard,char __user * buf,struct st_ram_io * st_loc,struct mailbox * mailbox)483 static int do_ac_read(int IndexCard, char __user *buf,
484 struct st_ram_io *st_loc, struct mailbox *mailbox)
485 {
486 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
487 unsigned char *to = (unsigned char *)mailbox;
488 #ifdef DEBUG
489 int c;
490 #endif
491
492 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
493 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
494
495
496 {
497 int c;
498
499 for (c = 0; c < sizeof(struct mailbox); c++)
500 *(to++) = readb(from++);
501 }
502 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
503 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
504 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
505 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
506 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
507 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
508 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
509 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
510 Dummy = readb(apbs[IndexCard].RamIO + VERS);
511
512 #ifdef DEBUG
513 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
514
515 for (c = 0; c < sizeof(struct st_ram_io);) {
516 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
517
518 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
519 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
520 }
521 }
522
523 printk("\nstruct mailbox follows:");
524
525 for (c = 0; c < sizeof(struct mailbox);) {
526 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
527
528 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
529 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
530 }
531 }
532 printk("\n");
533 #endif
534 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
535 }
536
ac_read(struct file * filp,char __user * buf,size_t count,loff_t * ptr)537 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
538 {
539 unsigned long flags;
540 unsigned int i;
541 unsigned char tmp;
542 int ret = 0;
543 DECLARE_WAITQUEUE(wait, current);
544 #ifdef DEBUG
545 int loopcount=0;
546 #endif
547 /* No need to ratelimit this. Only root can trigger it anyway */
548 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
549 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
550 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
551 return -EINVAL;
552 }
553
554 while(1) {
555 /* Stick ourself on the wait queue */
556 set_current_state(TASK_INTERRUPTIBLE);
557 add_wait_queue(&FlagSleepRec, &wait);
558
559 /* Scan each board, looking for one which has a packet for us */
560 for (i=0; i < MAX_BOARD; i++) {
561 if (!apbs[i].RamIO)
562 continue;
563 spin_lock_irqsave(&apbs[i].mutex, flags);
564
565 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
566
567 if (tmp == 2) {
568 struct st_ram_io st_loc;
569 struct mailbox mailbox;
570
571 /* Got a packet for us */
572 memset(&st_loc, 0, sizeof(st_loc));
573 ret = do_ac_read(i, buf, &st_loc, &mailbox);
574 spin_unlock_irqrestore(&apbs[i].mutex, flags);
575 set_current_state(TASK_RUNNING);
576 remove_wait_queue(&FlagSleepRec, &wait);
577
578 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
579 return -EFAULT;
580 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
581 return -EFAULT;
582 return tmp;
583 }
584
585 if (tmp > 2) {
586 /* Got an error */
587 Dummy = readb(apbs[i].RamIO + VERS);
588
589 spin_unlock_irqrestore(&apbs[i].mutex, flags);
590 set_current_state(TASK_RUNNING);
591 remove_wait_queue(&FlagSleepRec, &wait);
592
593 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
594 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
595 DeviceErrorCount++;
596 return -EIO;
597 }
598
599 /* Nothing for us. Try the next board */
600 Dummy = readb(apbs[i].RamIO + VERS);
601 spin_unlock_irqrestore(&apbs[i].mutex, flags);
602
603 } /* per board */
604
605 /* OK - No boards had data for us. Sleep now */
606
607 schedule();
608 remove_wait_queue(&FlagSleepRec, &wait);
609
610 if (signal_pending(current))
611 return -EINTR;
612
613 #ifdef DEBUG
614 if (loopcount++ > 2) {
615 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
616 }
617 #endif
618 }
619 }
620
ac_interrupt(int vec,void * dev_instance)621 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
622 {
623 unsigned int i;
624 unsigned int FlagInt;
625 unsigned int LoopCount;
626 int handled = 0;
627
628 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
629
630 LoopCount = 0;
631
632 do {
633 FlagInt = 0;
634 for (i = 0; i < MAX_BOARD; i++) {
635
636 /* Skip if this board doesn't exist */
637 if (!apbs[i].RamIO)
638 continue;
639
640 spin_lock(&apbs[i].mutex);
641
642 /* Skip if this board doesn't want attention */
643 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
644 spin_unlock(&apbs[i].mutex);
645 continue;
646 }
647
648 handled = 1;
649 FlagInt = 1;
650 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
651
652 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
653 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
654 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
655 DeviceErrorCount++;
656 }
657
658 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
659 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
660
661 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
662 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
663 DeviceErrorCount++;
664 }
665
666 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
667 if (waitqueue_active(&FlagSleepRec)) {
668 wake_up_interruptible(&FlagSleepRec);
669 }
670 }
671
672 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
673 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
674 wake_up_interruptible(&apbs[i].FlagSleepSend);
675 }
676 }
677 Dummy = readb(apbs[i].RamIO + VERS);
678
679 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
680 /* There's another int waiting on this card */
681 spin_unlock(&apbs[i].mutex);
682 i--;
683 } else {
684 spin_unlock(&apbs[i].mutex);
685 }
686 }
687 if (FlagInt)
688 LoopCount = 0;
689 else
690 LoopCount++;
691 } while(LoopCount < 2);
692 return IRQ_RETVAL(handled);
693 }
694
695
696
ac_ioctl(struct file * file,unsigned int cmd,unsigned long arg)697 static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
698
699 { /* @ ADG ou ATO selon le cas */
700 int i;
701 unsigned char IndexCard;
702 void __iomem *pmem;
703 int ret = 0;
704 static int warncount = 10;
705 volatile unsigned char byte_reset_it;
706 struct st_ram_io *adgl;
707 void __user *argp = (void __user *)arg;
708
709 /* In general, the device is only openable by root anyway, so we're not
710 particularly concerned that bogus ioctls can flood the console. */
711
712 adgl = memdup_user(argp, sizeof(struct st_ram_io));
713 if (IS_ERR(adgl))
714 return PTR_ERR(adgl);
715
716 mutex_lock(&ac_mutex);
717 IndexCard = adgl->num_card-1;
718
719 if (cmd != 6 && IndexCard >= MAX_BOARD)
720 goto err;
721 IndexCard = array_index_nospec(IndexCard, MAX_BOARD);
722
723 if (cmd != 6 && !apbs[IndexCard].RamIO)
724 goto err;
725
726 switch (cmd) {
727
728 case 0:
729 pmem = apbs[IndexCard].RamIO;
730 for (i = 0; i < sizeof(struct st_ram_io); i++)
731 ((unsigned char *)adgl)[i]=readb(pmem++);
732 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
733 ret = -EFAULT;
734 break;
735 case 1:
736 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
737 for (i = 0; i < 4; i++)
738 adgl->conf_end_test[i] = readb(pmem++);
739 for (i = 0; i < 2; i++)
740 adgl->error_code[i] = readb(pmem++);
741 for (i = 0; i < 4; i++)
742 adgl->parameter_error[i] = readb(pmem++);
743 pmem = apbs[IndexCard].RamIO + VERS;
744 adgl->vers = readb(pmem);
745 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
746 for (i = 0; i < 20; i++)
747 adgl->reserv1[i] = readb(pmem++);
748 *(int *)&adgl->reserv1[20] =
749 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
751 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
752
753 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
754 ret = -EFAULT;
755 break;
756 case 2:
757 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
758 for (i = 0; i < 10; i++)
759 writeb(0xff, pmem++);
760 writeb(adgl->data_from_pc_ready,
761 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
762
763 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
764
765 for (i = 0; i < MAX_BOARD; i++) {
766 if (apbs[i].RamIO) {
767 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
768 }
769 }
770 break;
771 case 3:
772 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
773 writeb(adgl->tic_des_from_pc, pmem);
774 break;
775 case 4:
776 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
777 adgl->tic_owner_to_pc = readb(pmem++);
778 adgl->numcard_owner_to_pc = readb(pmem);
779 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
780 ret = -EFAULT;
781 break;
782 case 5:
783 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
785 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
786 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
787 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
788 break;
789 case 6:
790 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
791 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
792 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
793 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
794 for (i = 0; i < MAX_BOARD; i++) {
795 int serial;
796 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
797
798 if (!apbs[i].RamIO)
799 continue;
800
801 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
802 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
803 boardname[serial] = 0;
804
805 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
806 i+1,
807 (int)(readb(apbs[i].RamIO + VERS) >> 4),
808 (int)(readb(apbs[i].RamIO + VERS) & 0xF),
809 boardname);
810
811
812 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
813 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
814 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
815
816 if (serial != 0)
817 printk(" S/N %d\n", serial);
818 else
819 printk("\n");
820 }
821 if (DeviceErrorCount != 0)
822 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
823 if (ReadErrorCount != 0)
824 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
825 if (WriteErrorCount != 0)
826 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
827 if (waitqueue_active(&FlagSleepRec))
828 printk(KERN_INFO "Process in read pending\n");
829 for (i = 0; i < MAX_BOARD; i++) {
830 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
831 printk(KERN_INFO "Process in write pending board %d\n",i+1);
832 }
833 break;
834 default:
835 ret = -ENOTTY;
836 break;
837 }
838 Dummy = readb(apbs[IndexCard].RamIO + VERS);
839 kfree(adgl);
840 mutex_unlock(&ac_mutex);
841 return ret;
842
843 err:
844 if (warncount) {
845 pr_warn("APPLICOM driver IOCTL, bad board number %d\n",
846 (int)IndexCard + 1);
847 warncount--;
848 }
849 kfree(adgl);
850 mutex_unlock(&ac_mutex);
851 return -EINVAL;
852
853 }
854
855