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