e7ba774beda6b8598a47dd77faf52e5283437037
[linux-2.6.git] / drivers / char / applicom.c
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 <asm/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         pci_disable_device(dev);
349         return ret;
350 }
351
352 module_init(applicom_init);
353 module_exit(applicom_exit);
354
355
356 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
357 {
358         unsigned int NumCard;   /* Board number 1 -> 8           */
359         unsigned int IndexCard; /* Index board number 0 -> 7     */
360         unsigned char TicCard;  /* Board TIC to send             */
361         unsigned long flags;    /* Current priority              */
362         struct st_ram_io st_loc;
363         struct mailbox tmpmailbox;
364 #ifdef DEBUG
365         int c;
366 #endif
367         DECLARE_WAITQUEUE(wait, current);
368
369         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
370                 static int warncount = 5;
371                 if (warncount) {
372                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
373                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
374                         warncount--;
375                 }
376                 return -EINVAL;
377         }
378
379         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
380                 return -EFAULT;
381         
382         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
383                           sizeof(struct mailbox))) 
384                 return -EFAULT;
385
386         NumCard = st_loc.num_card;      /* board number to send          */
387         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
388         IndexCard = NumCard - 1;
389
390         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
391                 return -EINVAL;
392
393 #ifdef DEBUG
394         printk("Write to applicom card #%d. struct st_ram_io follows:",
395                IndexCard+1);
396
397                 for (c = 0; c < sizeof(struct st_ram_io);) {
398                 
399                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
400
401                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
402                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
403                         }
404                 }
405
406                 printk("\nstruct mailbox follows:");
407
408                 for (c = 0; c < sizeof(struct mailbox);) {
409                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
410
411                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
412                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
413                         }
414                 }
415
416                 printk("\n");
417 #endif
418
419         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
420
421         /* Test octet ready correct */
422         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
423                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
424                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
425                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
426                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
427                 DeviceErrorCount++;
428                 return -EIO;
429         }
430         
431         /* Place ourselves on the wait queue */
432         set_current_state(TASK_INTERRUPTIBLE);
433         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
434
435         /* Check whether the card is ready for us */
436         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
437                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
438                 /* It's busy. Sleep. */
439
440                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
441                 schedule();
442                 if (signal_pending(current)) {
443                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
444                                           &wait);
445                         return -EINTR;
446                 }
447                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
448                 set_current_state(TASK_INTERRUPTIBLE);
449         }
450
451         /* We may not have actually slept */
452         set_current_state(TASK_RUNNING);
453         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
454
455         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
456
457         /* Which is best - lock down the pages with rawio and then
458            copy directly, or use bounce buffers? For now we do the latter 
459            because it works with 2.2 still */
460         {
461                 unsigned char *from = (unsigned char *) &tmpmailbox;
462                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
463                 int c;
464
465                 for (c = 0; c < sizeof(struct mailbox); c++)
466                         writeb(*(from++), to++);
467         }
468
469         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
470         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
471         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
472         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
473         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
474         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
475         Dummy = readb(apbs[IndexCard].RamIO + VERS);
476         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
477         return 0;
478 }
479
480 static int do_ac_read(int IndexCard, char __user *buf,
481                 struct st_ram_io *st_loc, struct mailbox *mailbox)
482 {
483         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
484         unsigned char *to = (unsigned char *)mailbox;
485 #ifdef DEBUG
486         int c;
487 #endif
488
489         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
490         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
491
492
493         {
494                 int c;
495
496                 for (c = 0; c < sizeof(struct mailbox); c++)
497                         *(to++) = readb(from++);
498         }
499         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
500         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
501         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
502         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
503                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
504         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
505         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
506         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
507         Dummy = readb(apbs[IndexCard].RamIO + VERS);
508
509 #ifdef DEBUG
510                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
511
512                 for (c = 0; c < sizeof(struct st_ram_io);) {
513                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
514
515                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
516                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
517                         }
518                 }
519
520                 printk("\nstruct mailbox follows:");
521
522                 for (c = 0; c < sizeof(struct mailbox);) {
523                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
524
525                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
526                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
527                         }
528                 }
529                 printk("\n");
530 #endif
531         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
532 }
533
534 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
535 {
536         unsigned long flags;
537         unsigned int i;
538         unsigned char tmp;
539         int ret = 0;
540         DECLARE_WAITQUEUE(wait, current);
541 #ifdef DEBUG
542         int loopcount=0;
543 #endif
544         /* No need to ratelimit this. Only root can trigger it anyway */
545         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
546                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
547                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
548                 return -EINVAL;
549         }
550         
551         while(1) {
552                 /* Stick ourself on the wait queue */
553                 set_current_state(TASK_INTERRUPTIBLE);
554                 add_wait_queue(&FlagSleepRec, &wait);
555                 
556                 /* Scan each board, looking for one which has a packet for us */
557                 for (i=0; i < MAX_BOARD; i++) {
558                         if (!apbs[i].RamIO)
559                                 continue;
560                         spin_lock_irqsave(&apbs[i].mutex, flags);
561                         
562                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
563                         
564                         if (tmp == 2) {
565                                 struct st_ram_io st_loc;
566                                 struct mailbox mailbox;
567
568                                 /* Got a packet for us */
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[IndexCard].RamIO + VERS) >> 4),
807                                (int)(readb(apbs[IndexCard].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