AUDIT: Honour audit_backlog_limit again.
[linux-2.6] / 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 /* adresses 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/slab.h>
27 #include <linux/errno.h>
28 #include <linux/miscdevice.h>
29 #include <linux/pci.h>
30 #include <linux/wait.h>
31 #include <linux/init.h>
32 #include <linux/fs.h>
33
34 #include <asm/io.h>
35 #include <asm/uaccess.h>
36
37 #include "applicom.h"
38
39
40 /* NOTE: We use for loops with {write,read}b() instead of 
41    memcpy_{from,to}io throughout this driver. This is because
42    the board doesn't correctly handle word accesses - only
43    bytes. 
44 */
45
46
47 #undef DEBUG
48
49 #define MAX_BOARD 8             /* maximum of pc board possible */
50 #define MAX_ISA_BOARD 4
51 #define LEN_RAM_IO 0x800
52 #define AC_MINOR 157
53
54 #ifndef PCI_VENDOR_ID_APPLICOM
55 #define PCI_VENDOR_ID_APPLICOM                0x1389
56 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
57 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
58 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
59 #endif
60 #define MAX_PCI_DEVICE_NUM 3
61
62 static char *applicom_pci_devnames[] = {
63         "PCI board",
64         "PCI2000IBS / PCI2000CAN",
65         "PCI2000PFB"
66 };
67
68 static struct pci_device_id applicom_pci_tbl[] = {
69         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC,
70           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
71         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN,
72           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
73         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB,
74           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
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
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 int ac_ioctl(struct inode *, struct file *, unsigned int,
112                     unsigned long);
113 static irqreturn_t ac_interrupt(int, void *, struct pt_regs *);
114
115 static struct file_operations ac_fops = {
116         .owner = THIS_MODULE,
117         .llseek = no_llseek,
118         .read = ac_read,
119         .write = ac_write,
120         .ioctl = ac_ioctl,
121 };
122
123 static struct miscdevice ac_miscdev = {
124         AC_MINOR,
125         "ac",
126         &ac_fops
127 };
128
129 static int dummy;       /* dev_id for request_irq() */
130
131 static int ac_register_board(unsigned long physloc, void __iomem *loc, 
132                       unsigned char boardno)
133 {
134         volatile unsigned char byte_reset_it;
135
136         if((readb(loc + CONF_END_TEST)     != 0x00) ||
137            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
138            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
139            (readb(loc + CONF_END_TEST + 3) != 0xFF))
140                 return 0;
141
142         if (!boardno)
143                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
144
145         if (!boardno && boardno > MAX_BOARD) {
146                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
147                        boardno, physloc, MAX_BOARD);
148                 return 0;
149         }
150
151         if (apbs[boardno - 1].RamIO) {
152                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 
153                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
154                 return 0;
155         }
156
157         boardno--;
158
159         apbs[boardno].PhysIO = physloc;
160         apbs[boardno].RamIO = loc;
161         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
162         spin_lock_init(&apbs[boardno].mutex);
163         byte_reset_it = readb(loc + RAM_IT_TO_PC);
164
165         numboards++;
166         return boardno + 1;
167 }
168
169 #ifdef MODULE
170
171 #define applicom_init init_module
172
173 void cleanup_module(void)
174 {
175         int i;
176
177         misc_deregister(&ac_miscdev);
178
179         for (i = 0; i < MAX_BOARD; i++) {
180
181                 if (!apbs[i].RamIO)
182                         continue;
183
184                 if (apbs[i].irq)
185                         free_irq(apbs[i].irq, &dummy);
186
187                 iounmap(apbs[i].RamIO);
188         }
189 }
190
191 #endif                          /* MODULE */
192
193 int __init applicom_init(void)
194 {
195         int i, numisa = 0;
196         struct pci_dev *dev = NULL;
197         void __iomem *RamIO;
198         int boardno;
199
200         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
201
202         /* No mem and irq given - check for a PCI card */
203
204         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
205
206                 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
207                         continue;
208                 
209                 if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
210                         continue;
211                 
212                 if (pci_enable_device(dev))
213                         return -EIO;
214
215                 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
216
217                 if (!RamIO) {
218                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start);
219                         pci_disable_device(dev);
220                         return -EIO;
221                 }
222
223                 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
224                        applicom_pci_devnames[dev->device-1], dev->resource[0].start, 
225                        dev->irq);
226
227                 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
228                 if (!boardno) {
229                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
230                         iounmap(RamIO);
231                         pci_disable_device(dev);
232                         continue;
233                 }
234
235                 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) {
236                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
237                         iounmap(RamIO);
238                         pci_disable_device(dev);
239                         apbs[boardno - 1].RamIO = NULL;
240                         continue;
241                 }
242
243                 /* Enable interrupts. */
244
245                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
246
247                 apbs[boardno - 1].irq = dev->irq;
248         }
249
250         /* Finished with PCI cards. If none registered, 
251          * and there was no mem/irq specified, exit */
252
253         if (!mem || !irq) {
254                 if (numboards)
255                         goto fin;
256                 else {
257                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
258                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
259                         return -ENXIO;
260                 }
261         }
262
263         /* Now try the specified ISA cards */
264
265         for (i = 0; i < MAX_ISA_BOARD; i++) {
266                 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
267
268                 if (!RamIO) {
269                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
270                         continue;
271                 }
272
273                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
274                                                   RamIO,i+1))) {
275                         iounmap(RamIO);
276                         continue;
277                 }
278
279                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
280
281                 if (!numisa) {
282                         if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) {
283                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
284                                 iounmap(RamIO);
285                                 apbs[boardno - 1].RamIO = NULL;
286                         }
287                         else
288                                 apbs[boardno - 1].irq = irq;
289                 }
290                 else
291                         apbs[boardno - 1].irq = 0;
292
293                 numisa++;
294         }
295
296         if (!numisa)
297                 printk(KERN_WARNING"ac.o: No valid ISA Applicom boards found at mem 0x%lx\n",mem);
298
299  fin:
300         init_waitqueue_head(&FlagSleepRec);
301
302         WriteErrorCount = 0;
303         ReadErrorCount = 0;
304         DeviceErrorCount = 0;
305
306         if (numboards) {
307                 misc_register(&ac_miscdev);
308                 for (i = 0; i < MAX_BOARD; i++) {
309                         int serial;
310                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
311
312                         if (!apbs[i].RamIO)
313                                 continue;
314
315                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
316                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
317
318                         boardname[serial] = 0;
319
320
321                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
322                                i+1, boardname,
323                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
324                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
325                         
326                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
327                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
328                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
329
330                         if (serial != 0)
331                                 printk(" S/N %d\n", serial);
332                         else
333                                 printk("\n");
334                 }
335                 return 0;
336         }
337
338         else
339                 return -ENXIO;
340 }
341
342
343 #ifndef MODULE
344 __initcall(applicom_init);
345 #endif
346
347 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
348 {
349         unsigned int NumCard;   /* Board number 1 -> 8           */
350         unsigned int IndexCard; /* Index board number 0 -> 7     */
351         unsigned char TicCard;  /* Board TIC to send             */
352         unsigned long flags;    /* Current priority              */
353         struct st_ram_io st_loc;
354         struct mailbox tmpmailbox;
355 #ifdef DEBUG
356         int c;
357 #endif
358         DECLARE_WAITQUEUE(wait, current);
359
360         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
361                 static int warncount = 5;
362                 if (warncount) {
363                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
364                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
365                         warncount--;
366                 }
367                 return -EINVAL;
368         }
369
370         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
371                 return -EFAULT;
372         
373         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
374                           sizeof(struct mailbox))) 
375                 return -EFAULT;
376
377         NumCard = st_loc.num_card;      /* board number to send          */
378         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
379         IndexCard = NumCard - 1;
380
381         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
382                 return -EINVAL;
383
384 #ifdef DEBUG
385         printk("Write to applicom card #%d. struct st_ram_io follows:",
386                IndexCard+1);
387
388                 for (c = 0; c < sizeof(struct st_ram_io);) {
389                 
390                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
391
392                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
393                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
394                         }
395                 }
396
397                 printk("\nstruct mailbox follows:");
398
399                 for (c = 0; c < sizeof(struct mailbox);) {
400                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
401
402                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
403                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
404                         }
405                 }
406
407                 printk("\n");
408 #endif
409
410         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
411
412         /* Test octet ready correct */
413         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
414                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
415                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
416                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
417                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
418                 DeviceErrorCount++;
419                 return -EIO;
420         }
421         
422         /* Place ourselves on the wait queue */
423         set_current_state(TASK_INTERRUPTIBLE);
424         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
425
426         /* Check whether the card is ready for us */
427         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
428                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
429                 /* It's busy. Sleep. */
430
431                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
432                 schedule();
433                 if (signal_pending(current)) {
434                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
435                                           &wait);
436                         return -EINTR;
437                 }
438                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
439                 set_current_state(TASK_INTERRUPTIBLE);
440         }
441
442         /* We may not have actually slept */
443         set_current_state(TASK_RUNNING);
444         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
445
446         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
447
448         /* Which is best - lock down the pages with rawio and then
449            copy directly, or use bounce buffers? For now we do the latter 
450            because it works with 2.2 still */
451         {
452                 unsigned char *from = (unsigned char *) &tmpmailbox;
453                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
454                 int c;
455
456                 for (c = 0; c < sizeof(struct mailbox); c++)
457                         writeb(*(from++), to++);
458         }
459
460         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
461         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
462         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
463         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
464         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
465         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
466         Dummy = readb(apbs[IndexCard].RamIO + VERS);
467         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
468         return 0;
469 }
470
471 static int do_ac_read(int IndexCard, char __user *buf,
472                 struct st_ram_io *st_loc, struct mailbox *mailbox)
473 {
474         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
475         unsigned char *to = (unsigned char *)&mailbox;
476 #ifdef DEBUG
477         int c;
478 #endif
479
480         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
481         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
482
483
484         {
485                 int c;
486
487                 for (c = 0; c < sizeof(struct mailbox); c++)
488                         *(to++) = readb(from++);
489         }
490         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
491         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
492         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
493         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
494                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
495         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
496         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
497         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
498         Dummy = readb(apbs[IndexCard].RamIO + VERS);
499
500 #ifdef DEBUG
501                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
502
503                 for (c = 0; c < sizeof(struct st_ram_io);) {
504                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
505
506                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
507                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
508                         }
509                 }
510
511                 printk("\nstruct mailbox follows:");
512
513                 for (c = 0; c < sizeof(struct mailbox);) {
514                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
515
516                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
517                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
518                         }
519                 }
520                 printk("\n");
521 #endif
522         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
523 }
524
525 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
526 {
527         unsigned long flags;
528         unsigned int i;
529         unsigned char tmp;
530         int ret = 0;
531         DECLARE_WAITQUEUE(wait, current);
532 #ifdef DEBUG
533         int loopcount=0;
534 #endif
535         /* No need to ratelimit this. Only root can trigger it anyway */
536         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
537                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
538                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
539                 return -EINVAL;
540         }
541         
542         while(1) {
543                 /* Stick ourself on the wait queue */
544                 set_current_state(TASK_INTERRUPTIBLE);
545                 add_wait_queue(&FlagSleepRec, &wait);
546                 
547                 /* Scan each board, looking for one which has a packet for us */
548                 for (i=0; i < MAX_BOARD; i++) {
549                         if (!apbs[i].RamIO)
550                                 continue;
551                         spin_lock_irqsave(&apbs[i].mutex, flags);
552                         
553                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
554                         
555                         if (tmp == 2) {
556                                 struct st_ram_io st_loc;
557                                 struct mailbox mailbox;
558
559                                 /* Got a packet for us */
560                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
561                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
562                                 set_current_state(TASK_RUNNING);
563                                 remove_wait_queue(&FlagSleepRec, &wait);
564
565                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
566                                         return -EFAULT;
567                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
568                                         return -EFAULT;
569                                 return tmp;
570                         }
571                         
572                         if (tmp > 2) {
573                                 /* Got an error */
574                                 Dummy = readb(apbs[i].RamIO + VERS);
575                                 
576                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
577                                 set_current_state(TASK_RUNNING);
578                                 remove_wait_queue(&FlagSleepRec, &wait);
579                                 
580                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
581                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
582                                 DeviceErrorCount++;
583                                 return -EIO;
584                         }
585                         
586                         /* Nothing for us. Try the next board */
587                         Dummy = readb(apbs[i].RamIO + VERS);
588                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
589                         
590                 } /* per board */
591
592                 /* OK - No boards had data for us. Sleep now */
593
594                 schedule();
595                 remove_wait_queue(&FlagSleepRec, &wait);
596
597                 if (signal_pending(current))
598                         return -EINTR;
599
600 #ifdef DEBUG
601                 if (loopcount++ > 2) {
602                         printk("Looping in ac_read. loopcount %d\n", loopcount);
603                 }
604 #endif
605         } 
606 }
607
608 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
609 {
610         unsigned int i;
611         unsigned int FlagInt;
612         unsigned int LoopCount;
613         int handled = 0;
614
615         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
616
617         LoopCount = 0;
618
619         do {
620                 FlagInt = 0;
621                 for (i = 0; i < MAX_BOARD; i++) {
622                         
623                         /* Skip if this board doesn't exist */
624                         if (!apbs[i].RamIO)
625                                 continue;
626
627                         spin_lock(&apbs[i].mutex);
628
629                         /* Skip if this board doesn't want attention */
630                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
631                                 spin_unlock(&apbs[i].mutex);
632                                 continue;
633                         }
634
635                         handled = 1;
636                         FlagInt = 1;
637                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
638
639                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
640                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
641                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
642                                 DeviceErrorCount++;
643                         }
644
645                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
646                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
647                                 
648                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
649                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
650                                 DeviceErrorCount++;
651                         }
652
653                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
654                                 if (waitqueue_active(&FlagSleepRec)) {
655                                 wake_up_interruptible(&FlagSleepRec);
656                         }
657                         }
658
659                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
660                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
661                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
662                                 }
663                         }
664                         Dummy = readb(apbs[i].RamIO + VERS);
665
666                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
667                                 /* There's another int waiting on this card */
668                                 spin_unlock(&apbs[i].mutex);
669                                 i--;
670                         } else {
671                                 spin_unlock(&apbs[i].mutex);
672                         }
673                 }
674                 if (FlagInt)
675                         LoopCount = 0;
676                 else
677                         LoopCount++;
678         } while(LoopCount < 2);
679         return IRQ_RETVAL(handled);
680 }
681
682
683
684 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
685      
686 {                               /* @ ADG ou ATO selon le cas */
687         int i;
688         unsigned char IndexCard;
689         void __iomem *pmem;
690         int ret = 0;
691         volatile unsigned char byte_reset_it;
692         struct st_ram_io *adgl;
693         void __user *argp = (void __user *)arg;
694
695         /* In general, the device is only openable by root anyway, so we're not
696            particularly concerned that bogus ioctls can flood the console. */
697
698         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
699         if (!adgl)
700                 return -ENOMEM;
701
702         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
703                 kfree(adgl);
704                 return -EFAULT;
705         }
706         
707         IndexCard = adgl->num_card-1;
708          
709         if(cmd != 0 && cmd != 6 &&
710            ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
711                 static int warncount = 10;
712                 if (warncount) {
713                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
714                         warncount--;
715                 }
716                 kfree(adgl);
717                 return -EINVAL;
718         }
719
720         switch (cmd) {
721                 
722         case 0:
723                 pmem = apbs[IndexCard].RamIO;
724                 for (i = 0; i < sizeof(struct st_ram_io); i++)
725                         ((unsigned char *)adgl)[i]=readb(pmem++);
726                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
727                         ret = -EFAULT;
728                 break;
729         case 1:
730                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
731                 for (i = 0; i < 4; i++)
732                         adgl->conf_end_test[i] = readb(pmem++);
733                 for (i = 0; i < 2; i++)
734                         adgl->error_code[i] = readb(pmem++);
735                 for (i = 0; i < 4; i++)
736                         adgl->parameter_error[i] = readb(pmem++);
737                 pmem = apbs[IndexCard].RamIO + VERS;
738                 adgl->vers = readb(pmem);
739                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
740                 for (i = 0; i < 20; i++)
741                         adgl->reserv1[i] = readb(pmem++);
742                 *(int *)&adgl->reserv1[20] =  
743                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 
744                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 
745                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
746
747                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
748                         ret = -EFAULT;
749                 break;
750         case 2:
751                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
752                 for (i = 0; i < 10; i++)
753                         writeb(0xff, pmem++);
754                 writeb(adgl->data_from_pc_ready, 
755                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
756
757                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
758                 
759                 for (i = 0; i < MAX_BOARD; i++) {
760                         if (apbs[i].RamIO) {
761                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
762                         }
763                 }
764                 break;
765         case 3:
766                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
767                 writeb(adgl->tic_des_from_pc, pmem);
768                 break;
769         case 4:
770                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
771                 adgl->tic_owner_to_pc     = readb(pmem++);
772                 adgl->numcard_owner_to_pc = readb(pmem);
773                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
774                         ret = -EFAULT;
775                 break;
776         case 5:
777                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
778                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
779                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
780                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
781                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
782                 break;
783         case 6:
784                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
785                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
786                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
787                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
788                 for (i = 0; i < MAX_BOARD; i++) {
789                         int serial;
790                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
791
792                         if (!apbs[i].RamIO)
793                                 continue;
794
795                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
796                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
797                         boardname[serial] = 0;
798
799                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
800                                i+1,
801                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
802                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
803                                boardname);
804
805
806                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
807                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
808                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
809
810                         if (serial != 0)
811                                 printk(" S/N %d\n", serial);
812                         else
813                                 printk("\n");
814                 }
815                 if (DeviceErrorCount != 0)
816                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
817                 if (ReadErrorCount != 0)
818                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
819                 if (WriteErrorCount != 0)
820                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
821                 if (waitqueue_active(&FlagSleepRec))
822                         printk(KERN_INFO "Process in read pending\n");
823                 for (i = 0; i < MAX_BOARD; i++) {
824                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
825                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
826                 }
827                 break;
828         default:
829                 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
830                 ret = -EINVAL;
831                 break;
832         }
833         Dummy = readb(apbs[IndexCard].RamIO + VERS);
834         kfree(adgl);
835         return 0;
836 }
837
838 #ifndef MODULE
839 static int __init applicom_setup(char *str)
840 {
841         int ints[4];
842
843         (void) get_options(str, 4, ints);
844
845         if (ints[0] > 2) {
846                 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
847         }
848
849         if (ints[0] < 2) {
850                 printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
851                 return 0;
852         }
853
854         mem = ints[1];
855         irq = ints[2];
856         return 1;
857 }
858
859 __setup("applicom=", applicom_setup);
860
861 #endif                          /* MODULE */
862