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USB: serial: ark3116: fix open error handling
[linux/fpc-iii.git] / drivers / char / applicom.c
blobe5c62dcf2c11cb10a920028b8cd13bbd0962c59b
1 /* Derived from Applicom driver ac.c for SCO Unix */
2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */
3 /* dwmw2@infradead.org 30/8/98 */
4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */
5 /* This module is for Linux 2.1 and 2.2 series kernels. */
6 /*****************************************************************************/
7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */
8 /* ceci pour reseter correctement apres une sortie sauvage */
9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */
10 /* LoopCount n'etait pas initialise a 0. */
11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */
12 /* pour liberer le bus */
13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */
15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */
16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */
17 /* addresses de base des cartes, IOCTL 6 plus complet */
18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */
19 /* de code autre que le texte V2.6.1 en V2.8.0 */
20 /*****************************************************************************/
21
22
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/sched.h>
27 #include <linux/slab.h>
28 #include <linux/errno.h>
29 #include <linux/mutex.h>
30 #include <linux/miscdevice.h>
31 #include <linux/pci.h>
32 #include <linux/wait.h>
33 #include <linux/init.h>
34 #include <linux/fs.h>
35
36 #include <asm/io.h>
37 #include <linux/uaccess.h>
38
39 #include "applicom.h"
40
41
42 /* NOTE: We use for loops with {write,read}b() instead of
43 memcpy_{from,to}io throughout this driver. This is because
44 the board doesn't correctly handle word accesses - only
45 bytes.
46 */
47
48
49 #undef DEBUG
50
51 #define MAX_BOARD 8 /* maximum of pc board possible */
52 #define MAX_ISA_BOARD 4
53 #define LEN_RAM_IO 0x800
54 #define AC_MINOR 157
55
56 #ifndef PCI_VENDOR_ID_APPLICOM
57 #define PCI_VENDOR_ID_APPLICOM 0x1389
58 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
59 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
60 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
61 #endif
62
63 static DEFINE_MUTEX(ac_mutex);
64 static char *applicom_pci_devnames[] = {
65 "PCI board",
66 "PCI2000IBS / PCI2000CAN",
67 "PCI2000PFB"
68 };
69
70 static struct pci_device_id applicom_pci_tbl[] = {
71 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
72 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
73 { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
74 { 0 }
75 };
76 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
77
78 MODULE_AUTHOR("David Woodhouse & Applicom International");
79 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
80 MODULE_LICENSE("GPL");
81 MODULE_ALIAS_MISCDEV(AC_MINOR);
82
83 MODULE_SUPPORTED_DEVICE("ac");
84
85
86 static struct applicom_board {
87 unsigned long PhysIO;
88 void __iomem *RamIO;
89 wait_queue_head_t FlagSleepSend;
90 long irq;
91 spinlock_t mutex;
92 } apbs[MAX_BOARD];
93
94 static unsigned int irq = 0; /* interrupt number IRQ */
95 static unsigned long mem = 0; /* physical segment of board */
96
97 module_param(irq, uint, 0);
98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
99 module_param(mem, ulong, 0);
100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
101
102 static unsigned int numboards; /* number of installed boards */
103 static volatile unsigned char Dummy;
104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
105 static unsigned int WriteErrorCount; /* number of write error */
106 static unsigned int ReadErrorCount; /* number of read error */
107 static unsigned int DeviceErrorCount; /* number of device error */
108
109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
111 static long ac_ioctl(struct file *, unsigned int, unsigned long);
112 static irqreturn_t ac_interrupt(int, void *);
113
114 static const struct file_operations ac_fops = {
115 .owner = THIS_MODULE,
116 .llseek = no_llseek,
117 .read = ac_read,
118 .write = ac_write,
119 .unlocked_ioctl = ac_ioctl,
120 };
121
122 static struct miscdevice ac_miscdev = {
123 AC_MINOR,
124 "ac",
125 &ac_fops
126 };
127
128 static int dummy; /* dev_id for request_irq() */
129
130 static int ac_register_board(unsigned long physloc, void __iomem *loc,
131 unsigned char boardno)
132 {
133 volatile unsigned char byte_reset_it;
134
135 if((readb(loc + CONF_END_TEST) != 0x00) ||
136 (readb(loc + CONF_END_TEST + 1) != 0x55) ||
137 (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
138 (readb(loc + CONF_END_TEST + 3) != 0xFF))
139 return 0;
140
141 if (!boardno)
142 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
143
144 if (!boardno || boardno > MAX_BOARD) {
145 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
146 boardno, physloc, MAX_BOARD);
147 return 0;
148 }
149
150 if (apbs[boardno - 1].RamIO) {
151 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
152 boardno, physloc, boardno, apbs[boardno-1].PhysIO);
153 return 0;
154 }
155
156 boardno--;
157
158 apbs[boardno].PhysIO = physloc;
159 apbs[boardno].RamIO = loc;
160 init_waitqueue_head(&apbs[boardno].FlagSleepSend);
161 spin_lock_init(&apbs[boardno].mutex);
162 byte_reset_it = readb(loc + RAM_IT_TO_PC);
163
164 numboards++;
165 return boardno + 1;
166 }
167
168 static void __exit applicom_exit(void)
169 {
170 unsigned int i;
171
172 misc_deregister(&ac_miscdev);
173
174 for (i = 0; i < MAX_BOARD; i++) {
175
176 if (!apbs[i].RamIO)
177 continue;
178
179 if (apbs[i].irq)
180 free_irq(apbs[i].irq, &dummy);
181
182 iounmap(apbs[i].RamIO);
183 }
184 }
185
186 static int __init applicom_init(void)
187 {
188 int i, numisa = 0;
189 struct pci_dev *dev = NULL;
190 void __iomem *RamIO;
191 int boardno, ret;
192
193 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
194
195 /* No mem and irq given - check for a PCI card */
196
197 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
198
199 if (!pci_match_id(applicom_pci_tbl, dev))
200 continue;
201
202 if (pci_enable_device(dev))
203 return -EIO;
204
205 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
206
207 if (!RamIO) {
208 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
209 "space at 0x%llx\n",
210 (unsigned long long)pci_resource_start(dev, 0));
211 pci_disable_device(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_nocache(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
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((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
390 return -EINVAL;
391
392 #ifdef DEBUG
393 printk("Write to applicom card #%d. struct st_ram_io follows:",
394 IndexCard+1);
395
396 for (c = 0; c < sizeof(struct st_ram_io);) {
397
398 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
399
400 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
401 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
402 }
403 }
404
405 printk("\nstruct mailbox follows:");
406
407 for (c = 0; c < sizeof(struct mailbox);) {
408 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
409
410 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
411 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
412 }
413 }
414
415 printk("\n");
416 #endif
417
418 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
419
420 /* Test octet ready correct */
421 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
422 Dummy = readb(apbs[IndexCard].RamIO + VERS);
423 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
424 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
425 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
426 DeviceErrorCount++;
427 return -EIO;
428 }
429
430 /* Place ourselves on the wait queue */
431 set_current_state(TASK_INTERRUPTIBLE);
432 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
433
434 /* Check whether the card is ready for us */
435 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
436 Dummy = readb(apbs[IndexCard].RamIO + VERS);
437 /* It's busy. Sleep. */
438
439 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
440 schedule();
441 if (signal_pending(current)) {
442 remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
443 &wait);
444 return -EINTR;
445 }
446 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
447 set_current_state(TASK_INTERRUPTIBLE);
448 }
449
450 /* We may not have actually slept */
451 set_current_state(TASK_RUNNING);
452 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
453
454 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
455
456 /* Which is best - lock down the pages with rawio and then
457 copy directly, or use bounce buffers? For now we do the latter
458 because it works with 2.2 still */
459 {
460 unsigned char *from = (unsigned char *) &tmpmailbox;
461 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
462 int c;
463
464 for (c = 0; c < sizeof(struct mailbox); c++)
465 writeb(*(from++), to++);
466 }
467
468 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
469 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
470 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
471 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
472 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
473 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
474 Dummy = readb(apbs[IndexCard].RamIO + VERS);
475 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
476 return 0;
477 }
478
479 static int do_ac_read(int IndexCard, char __user *buf,
480 struct st_ram_io *st_loc, struct mailbox *mailbox)
481 {
482 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
483 unsigned char *to = (unsigned char *)mailbox;
484 #ifdef DEBUG
485 int c;
486 #endif
487
488 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
489 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
490
491
492 {
493 int c;
494
495 for (c = 0; c < sizeof(struct mailbox); c++)
496 *(to++) = readb(from++);
497 }
498 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
499 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
500 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
501 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
502 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
503 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
504 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
505 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
506 Dummy = readb(apbs[IndexCard].RamIO + VERS);
507
508 #ifdef DEBUG
509 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
510
511 for (c = 0; c < sizeof(struct st_ram_io);) {
512 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
513
514 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
515 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
516 }
517 }
518
519 printk("\nstruct mailbox follows:");
520
521 for (c = 0; c < sizeof(struct mailbox);) {
522 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
523
524 for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
525 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
526 }
527 }
528 printk("\n");
529 #endif
530 return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
531 }
532
533 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
534 {
535 unsigned long flags;
536 unsigned int i;
537 unsigned char tmp;
538 int ret = 0;
539 DECLARE_WAITQUEUE(wait, current);
540 #ifdef DEBUG
541 int loopcount=0;
542 #endif
543 /* No need to ratelimit this. Only root can trigger it anyway */
544 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
545 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
546 count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
547 return -EINVAL;
548 }
549
550 while(1) {
551 /* Stick ourself on the wait queue */
552 set_current_state(TASK_INTERRUPTIBLE);
553 add_wait_queue(&FlagSleepRec, &wait);
554
555 /* Scan each board, looking for one which has a packet for us */
556 for (i=0; i < MAX_BOARD; i++) {
557 if (!apbs[i].RamIO)
558 continue;
559 spin_lock_irqsave(&apbs[i].mutex, flags);
560
561 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
562
563 if (tmp == 2) {
564 struct st_ram_io st_loc;
565 struct mailbox mailbox;
566
567 /* Got a packet for us */
568 memset(&st_loc, 0, sizeof(st_loc));
569 ret = do_ac_read(i, buf, &st_loc, &mailbox);
570 spin_unlock_irqrestore(&apbs[i].mutex, flags);
571 set_current_state(TASK_RUNNING);
572 remove_wait_queue(&FlagSleepRec, &wait);
573
574 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
575 return -EFAULT;
576 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
577 return -EFAULT;
578 return tmp;
579 }
580
581 if (tmp > 2) {
582 /* Got an error */
583 Dummy = readb(apbs[i].RamIO + VERS);
584
585 spin_unlock_irqrestore(&apbs[i].mutex, flags);
586 set_current_state(TASK_RUNNING);
587 remove_wait_queue(&FlagSleepRec, &wait);
588
589 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
590 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
591 DeviceErrorCount++;
592 return -EIO;
593 }
594
595 /* Nothing for us. Try the next board */
596 Dummy = readb(apbs[i].RamIO + VERS);
597 spin_unlock_irqrestore(&apbs[i].mutex, flags);
598
599 } /* per board */
600
601 /* OK - No boards had data for us. Sleep now */
602
603 schedule();
604 remove_wait_queue(&FlagSleepRec, &wait);
605
606 if (signal_pending(current))
607 return -EINTR;
608
609 #ifdef DEBUG
610 if (loopcount++ > 2) {
611 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
612 }
613 #endif
614 }
615 }
616
617 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
618 {
619 unsigned int i;
620 unsigned int FlagInt;
621 unsigned int LoopCount;
622 int handled = 0;
623
624 // printk("Applicom interrupt on IRQ %d occurred\n", vec);
625
626 LoopCount = 0;
627
628 do {
629 FlagInt = 0;
630 for (i = 0; i < MAX_BOARD; i++) {
631
632 /* Skip if this board doesn't exist */
633 if (!apbs[i].RamIO)
634 continue;
635
636 spin_lock(&apbs[i].mutex);
637
638 /* Skip if this board doesn't want attention */
639 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
640 spin_unlock(&apbs[i].mutex);
641 continue;
642 }
643
644 handled = 1;
645 FlagInt = 1;
646 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
647
648 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
649 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
650 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
651 DeviceErrorCount++;
652 }
653
654 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
655 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
656
657 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
658 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
659 DeviceErrorCount++;
660 }
661
662 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
663 if (waitqueue_active(&FlagSleepRec)) {
664 wake_up_interruptible(&FlagSleepRec);
665 }
666 }
667
668 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
669 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
670 wake_up_interruptible(&apbs[i].FlagSleepSend);
671 }
672 }
673 Dummy = readb(apbs[i].RamIO + VERS);
674
675 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
676 /* There's another int waiting on this card */
677 spin_unlock(&apbs[i].mutex);
678 i--;
679 } else {
680 spin_unlock(&apbs[i].mutex);
681 }
682 }
683 if (FlagInt)
684 LoopCount = 0;
685 else
686 LoopCount++;
687 } while(LoopCount < 2);
688 return IRQ_RETVAL(handled);
689 }
690
691
692
693 static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
694
695 { /* @ ADG ou ATO selon le cas */
696 int i;
697 unsigned char IndexCard;
698 void __iomem *pmem;
699 int ret = 0;
700 volatile unsigned char byte_reset_it;
701 struct st_ram_io *adgl;
702 void __user *argp = (void __user *)arg;
703
704 /* In general, the device is only openable by root anyway, so we're not
705 particularly concerned that bogus ioctls can flood the console. */
706
707 adgl = memdup_user(argp, sizeof(struct st_ram_io));
708 if (IS_ERR(adgl))
709 return PTR_ERR(adgl);
710
711 mutex_lock(&ac_mutex);
712 IndexCard = adgl->num_card-1;
713
714 if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
715 static int warncount = 10;
716 if (warncount) {
717 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
718 warncount--;
719 }
720 kfree(adgl);
721 mutex_unlock(&ac_mutex);
722 return -EINVAL;
723 }
724
725 switch (cmd) {
726
727 case 0:
728 pmem = apbs[IndexCard].RamIO;
729 for (i = 0; i < sizeof(struct st_ram_io); i++)
730 ((unsigned char *)adgl)[i]=readb(pmem++);
731 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
732 ret = -EFAULT;
733 break;
734 case 1:
735 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
736 for (i = 0; i < 4; i++)
737 adgl->conf_end_test[i] = readb(pmem++);
738 for (i = 0; i < 2; i++)
739 adgl->error_code[i] = readb(pmem++);
740 for (i = 0; i < 4; i++)
741 adgl->parameter_error[i] = readb(pmem++);
742 pmem = apbs[IndexCard].RamIO + VERS;
743 adgl->vers = readb(pmem);
744 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
745 for (i = 0; i < 20; i++)
746 adgl->reserv1[i] = readb(pmem++);
747 *(int *)&adgl->reserv1[20] =
748 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
749 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
750 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
751
752 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
753 ret = -EFAULT;
754 break;
755 case 2:
756 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
757 for (i = 0; i < 10; i++)
758 writeb(0xff, pmem++);
759 writeb(adgl->data_from_pc_ready,
760 apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
761
762 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
763
764 for (i = 0; i < MAX_BOARD; i++) {
765 if (apbs[i].RamIO) {
766 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
767 }
768 }
769 break;
770 case 3:
771 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
772 writeb(adgl->tic_des_from_pc, pmem);
773 break;
774 case 4:
775 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
776 adgl->tic_owner_to_pc = readb(pmem++);
777 adgl->numcard_owner_to_pc = readb(pmem);
778 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
779 ret = -EFAULT;
780 break;
781 case 5:
782 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
783 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
784 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
785 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
786 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
787 break;
788 case 6:
789 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
790 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
791 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
792 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
793 for (i = 0; i < MAX_BOARD; i++) {
794 int serial;
795 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
796
797 if (!apbs[i].RamIO)
798 continue;
799
800 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
801 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
802 boardname[serial] = 0;
803
804 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
805 i+1,
806 (int)(readb(apbs[i].RamIO + VERS) >> 4),
807 (int)(readb(apbs[i].RamIO + VERS) & 0xF),
808 boardname);
809
810
811 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
812 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
813 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
814
815 if (serial != 0)
816 printk(" S/N %d\n", serial);
817 else
818 printk("\n");
819 }
820 if (DeviceErrorCount != 0)
821 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
822 if (ReadErrorCount != 0)
823 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
824 if (WriteErrorCount != 0)
825 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
826 if (waitqueue_active(&FlagSleepRec))
827 printk(KERN_INFO "Process in read pending\n");
828 for (i = 0; i < MAX_BOARD; i++) {
829 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
830 printk(KERN_INFO "Process in write pending board %d\n",i+1);
831 }
832 break;
833 default:
834 ret = -ENOTTY;
835 break;
836 }
837 Dummy = readb(apbs[IndexCard].RamIO + VERS);
838 kfree(adgl);
839 mutex_unlock(&ac_mutex);
840 return 0;
841 }
842
Linux with added FPC-III support