[PATCH] drivers/char/pc8736x_gpio.c: unexport a static struct
[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 /* 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 const 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 static void __exit applicom_exit(void)
170 {
171         unsigned int i;
172
173         misc_deregister(&ac_miscdev);
174
175         for (i = 0; i < MAX_BOARD; i++) {
176
177                 if (!apbs[i].RamIO)
178                         continue;
179
180                 if (apbs[i].irq)
181                         free_irq(apbs[i].irq, &dummy);
182
183                 iounmap(apbs[i].RamIO);
184         }
185 }
186
187 static int __init applicom_init(void)
188 {
189         int i, numisa = 0;
190         struct pci_dev *dev = NULL;
191         void __iomem *RamIO;
192         int boardno, ret;
193
194         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
195
196         /* No mem and irq given - check for a PCI card */
197
198         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
199
200                 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
201                         continue;
202                 
203                 if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
204                         continue;
205                 
206                 if (pci_enable_device(dev))
207                         return -EIO;
208
209                 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
210
211                 if (!RamIO) {
212                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
213                                 "space at 0x%llx\n",
214                                 (unsigned long long)dev->resource[0].start);
215                         pci_disable_device(dev);
216                         return -EIO;
217                 }
218
219                 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
220                        applicom_pci_devnames[dev->device-1],
221                            (unsigned long long)dev->resource[0].start,
222                        dev->irq);
223
224                 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
225                 if (!boardno) {
226                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
227                         iounmap(RamIO);
228                         pci_disable_device(dev);
229                         continue;
230                 }
231
232                 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
233                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
234                         iounmap(RamIO);
235                         pci_disable_device(dev);
236                         apbs[boardno - 1].RamIO = NULL;
237                         continue;
238                 }
239
240                 /* Enable interrupts. */
241
242                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
243
244                 apbs[boardno - 1].irq = dev->irq;
245         }
246
247         /* Finished with PCI cards. If none registered, 
248          * and there was no mem/irq specified, exit */
249
250         if (!mem || !irq) {
251                 if (numboards)
252                         goto fin;
253                 else {
254                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
255                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
256                         return -ENXIO;
257                 }
258         }
259
260         /* Now try the specified ISA cards */
261
262         for (i = 0; i < MAX_ISA_BOARD; i++) {
263                 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
264
265                 if (!RamIO) {
266                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
267                         continue;
268                 }
269
270                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
271                                                   RamIO,i+1))) {
272                         iounmap(RamIO);
273                         continue;
274                 }
275
276                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
277
278                 if (!numisa) {
279                         if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
280                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
281                                 iounmap(RamIO);
282                                 apbs[boardno - 1].RamIO = NULL;
283                         }
284                         else
285                                 apbs[boardno - 1].irq = irq;
286                 }
287                 else
288                         apbs[boardno - 1].irq = 0;
289
290                 numisa++;
291         }
292
293         if (!numisa)
294                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
295                                 "at mem 0x%lx\n", mem);
296
297  fin:
298         init_waitqueue_head(&FlagSleepRec);
299
300         WriteErrorCount = 0;
301         ReadErrorCount = 0;
302         DeviceErrorCount = 0;
303
304         if (numboards) {
305                 ret = misc_register(&ac_miscdev);
306                 if (ret) {
307                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
308                         goto out;
309                 }
310                 for (i = 0; i < MAX_BOARD; i++) {
311                         int serial;
312                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
313
314                         if (!apbs[i].RamIO)
315                                 continue;
316
317                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
318                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
319
320                         boardname[serial] = 0;
321
322
323                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
324                                i+1, boardname,
325                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
326                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
327                         
328                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
329                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
330                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
331
332                         if (serial != 0)
333                                 printk(" S/N %d\n", serial);
334                         else
335                                 printk("\n");
336                 }
337                 return 0;
338         }
339
340         else
341                 return -ENXIO;
342
343 out:
344         for (i = 0; i < MAX_BOARD; i++) {
345                 if (!apbs[i].RamIO)
346                         continue;
347                 if (apbs[i].irq)
348                         free_irq(apbs[i].irq, &dummy);
349                 iounmap(apbs[i].RamIO);
350         }
351         pci_disable_device(dev);
352         return ret;
353 }
354
355 module_init(applicom_init);
356 module_exit(applicom_exit);
357
358
359 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
360 {
361         unsigned int NumCard;   /* Board number 1 -> 8           */
362         unsigned int IndexCard; /* Index board number 0 -> 7     */
363         unsigned char TicCard;  /* Board TIC to send             */
364         unsigned long flags;    /* Current priority              */
365         struct st_ram_io st_loc;
366         struct mailbox tmpmailbox;
367 #ifdef DEBUG
368         int c;
369 #endif
370         DECLARE_WAITQUEUE(wait, current);
371
372         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
373                 static int warncount = 5;
374                 if (warncount) {
375                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
376                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
377                         warncount--;
378                 }
379                 return -EINVAL;
380         }
381
382         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
383                 return -EFAULT;
384         
385         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
386                           sizeof(struct mailbox))) 
387                 return -EFAULT;
388
389         NumCard = st_loc.num_card;      /* board number to send          */
390         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
391         IndexCard = NumCard - 1;
392
393         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
394                 return -EINVAL;
395
396 #ifdef DEBUG
397         printk("Write to applicom card #%d. struct st_ram_io follows:",
398                IndexCard+1);
399
400                 for (c = 0; c < sizeof(struct st_ram_io);) {
401                 
402                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
403
404                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
405                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
406                         }
407                 }
408
409                 printk("\nstruct mailbox follows:");
410
411                 for (c = 0; c < sizeof(struct mailbox);) {
412                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
413
414                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
415                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
416                         }
417                 }
418
419                 printk("\n");
420 #endif
421
422         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
423
424         /* Test octet ready correct */
425         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
426                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
427                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
428                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
429                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
430                 DeviceErrorCount++;
431                 return -EIO;
432         }
433         
434         /* Place ourselves on the wait queue */
435         set_current_state(TASK_INTERRUPTIBLE);
436         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
437
438         /* Check whether the card is ready for us */
439         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
440                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
441                 /* It's busy. Sleep. */
442
443                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
444                 schedule();
445                 if (signal_pending(current)) {
446                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
447                                           &wait);
448                         return -EINTR;
449                 }
450                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
451                 set_current_state(TASK_INTERRUPTIBLE);
452         }
453
454         /* We may not have actually slept */
455         set_current_state(TASK_RUNNING);
456         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
457
458         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
459
460         /* Which is best - lock down the pages with rawio and then
461            copy directly, or use bounce buffers? For now we do the latter 
462            because it works with 2.2 still */
463         {
464                 unsigned char *from = (unsigned char *) &tmpmailbox;
465                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
466                 int c;
467
468                 for (c = 0; c < sizeof(struct mailbox); c++)
469                         writeb(*(from++), to++);
470         }
471
472         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
473         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
474         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
475         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
476         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
477         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
478         Dummy = readb(apbs[IndexCard].RamIO + VERS);
479         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
480         return 0;
481 }
482
483 static int do_ac_read(int IndexCard, char __user *buf,
484                 struct st_ram_io *st_loc, struct mailbox *mailbox)
485 {
486         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
487         unsigned char *to = (unsigned char *)&mailbox;
488 #ifdef DEBUG
489         int c;
490 #endif
491
492         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
493         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
494
495
496         {
497                 int c;
498
499                 for (c = 0; c < sizeof(struct mailbox); c++)
500                         *(to++) = readb(from++);
501         }
502         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
503         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
504         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
505         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
506                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
507         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
508         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
509         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
510         Dummy = readb(apbs[IndexCard].RamIO + VERS);
511
512 #ifdef DEBUG
513                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
514
515                 for (c = 0; c < sizeof(struct st_ram_io);) {
516                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
517
518                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
519                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
520                         }
521                 }
522
523                 printk("\nstruct mailbox follows:");
524
525                 for (c = 0; c < sizeof(struct mailbox);) {
526                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
527
528                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
529                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
530                         }
531                 }
532                 printk("\n");
533 #endif
534         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
535 }
536
537 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
538 {
539         unsigned long flags;
540         unsigned int i;
541         unsigned char tmp;
542         int ret = 0;
543         DECLARE_WAITQUEUE(wait, current);
544 #ifdef DEBUG
545         int loopcount=0;
546 #endif
547         /* No need to ratelimit this. Only root can trigger it anyway */
548         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
549                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
550                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
551                 return -EINVAL;
552         }
553         
554         while(1) {
555                 /* Stick ourself on the wait queue */
556                 set_current_state(TASK_INTERRUPTIBLE);
557                 add_wait_queue(&FlagSleepRec, &wait);
558                 
559                 /* Scan each board, looking for one which has a packet for us */
560                 for (i=0; i < MAX_BOARD; i++) {
561                         if (!apbs[i].RamIO)
562                                 continue;
563                         spin_lock_irqsave(&apbs[i].mutex, flags);
564                         
565                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
566                         
567                         if (tmp == 2) {
568                                 struct st_ram_io st_loc;
569                                 struct mailbox mailbox;
570
571                                 /* Got a packet for us */
572                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
573                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
574                                 set_current_state(TASK_RUNNING);
575                                 remove_wait_queue(&FlagSleepRec, &wait);
576
577                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
578                                         return -EFAULT;
579                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
580                                         return -EFAULT;
581                                 return tmp;
582                         }
583                         
584                         if (tmp > 2) {
585                                 /* Got an error */
586                                 Dummy = readb(apbs[i].RamIO + VERS);
587                                 
588                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
589                                 set_current_state(TASK_RUNNING);
590                                 remove_wait_queue(&FlagSleepRec, &wait);
591                                 
592                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
593                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
594                                 DeviceErrorCount++;
595                                 return -EIO;
596                         }
597                         
598                         /* Nothing for us. Try the next board */
599                         Dummy = readb(apbs[i].RamIO + VERS);
600                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
601                         
602                 } /* per board */
603
604                 /* OK - No boards had data for us. Sleep now */
605
606                 schedule();
607                 remove_wait_queue(&FlagSleepRec, &wait);
608
609                 if (signal_pending(current))
610                         return -EINTR;
611
612 #ifdef DEBUG
613                 if (loopcount++ > 2) {
614                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
615                 }
616 #endif
617         } 
618 }
619
620 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
621 {
622         unsigned int i;
623         unsigned int FlagInt;
624         unsigned int LoopCount;
625         int handled = 0;
626
627         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
628
629         LoopCount = 0;
630
631         do {
632                 FlagInt = 0;
633                 for (i = 0; i < MAX_BOARD; i++) {
634                         
635                         /* Skip if this board doesn't exist */
636                         if (!apbs[i].RamIO)
637                                 continue;
638
639                         spin_lock(&apbs[i].mutex);
640
641                         /* Skip if this board doesn't want attention */
642                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
643                                 spin_unlock(&apbs[i].mutex);
644                                 continue;
645                         }
646
647                         handled = 1;
648                         FlagInt = 1;
649                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
650
651                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
652                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
653                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
654                                 DeviceErrorCount++;
655                         }
656
657                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
658                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
659                                 
660                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
661                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
662                                 DeviceErrorCount++;
663                         }
664
665                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
666                                 if (waitqueue_active(&FlagSleepRec)) {
667                                 wake_up_interruptible(&FlagSleepRec);
668                         }
669                         }
670
671                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
672                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
673                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
674                                 }
675                         }
676                         Dummy = readb(apbs[i].RamIO + VERS);
677
678                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
679                                 /* There's another int waiting on this card */
680                                 spin_unlock(&apbs[i].mutex);
681                                 i--;
682                         } else {
683                                 spin_unlock(&apbs[i].mutex);
684                         }
685                 }
686                 if (FlagInt)
687                         LoopCount = 0;
688                 else
689                         LoopCount++;
690         } while(LoopCount < 2);
691         return IRQ_RETVAL(handled);
692 }
693
694
695
696 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
697      
698 {                               /* @ ADG ou ATO selon le cas */
699         int i;
700         unsigned char IndexCard;
701         void __iomem *pmem;
702         int ret = 0;
703         volatile unsigned char byte_reset_it;
704         struct st_ram_io *adgl;
705         void __user *argp = (void __user *)arg;
706
707         /* In general, the device is only openable by root anyway, so we're not
708            particularly concerned that bogus ioctls can flood the console. */
709
710         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
711         if (!adgl)
712                 return -ENOMEM;
713
714         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
715                 kfree(adgl);
716                 return -EFAULT;
717         }
718         
719         IndexCard = adgl->num_card-1;
720          
721         if(cmd != 0 && cmd != 6 &&
722            ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
723                 static int warncount = 10;
724                 if (warncount) {
725                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
726                         warncount--;
727                 }
728                 kfree(adgl);
729                 return -EINVAL;
730         }
731
732         switch (cmd) {
733                 
734         case 0:
735                 pmem = apbs[IndexCard].RamIO;
736                 for (i = 0; i < sizeof(struct st_ram_io); i++)
737                         ((unsigned char *)adgl)[i]=readb(pmem++);
738                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
739                         ret = -EFAULT;
740                 break;
741         case 1:
742                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
743                 for (i = 0; i < 4; i++)
744                         adgl->conf_end_test[i] = readb(pmem++);
745                 for (i = 0; i < 2; i++)
746                         adgl->error_code[i] = readb(pmem++);
747                 for (i = 0; i < 4; i++)
748                         adgl->parameter_error[i] = readb(pmem++);
749                 pmem = apbs[IndexCard].RamIO + VERS;
750                 adgl->vers = readb(pmem);
751                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
752                 for (i = 0; i < 20; i++)
753                         adgl->reserv1[i] = readb(pmem++);
754                 *(int *)&adgl->reserv1[20] =  
755                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 
756                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 
757                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
758
759                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
760                         ret = -EFAULT;
761                 break;
762         case 2:
763                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
764                 for (i = 0; i < 10; i++)
765                         writeb(0xff, pmem++);
766                 writeb(adgl->data_from_pc_ready, 
767                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
768
769                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
770                 
771                 for (i = 0; i < MAX_BOARD; i++) {
772                         if (apbs[i].RamIO) {
773                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
774                         }
775                 }
776                 break;
777         case 3:
778                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
779                 writeb(adgl->tic_des_from_pc, pmem);
780                 break;
781         case 4:
782                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
783                 adgl->tic_owner_to_pc     = readb(pmem++);
784                 adgl->numcard_owner_to_pc = readb(pmem);
785                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
786                         ret = -EFAULT;
787                 break;
788         case 5:
789                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
790                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
791                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
792                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
793                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
794                 break;
795         case 6:
796                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
797                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
798                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
799                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
800                 for (i = 0; i < MAX_BOARD; i++) {
801                         int serial;
802                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
803
804                         if (!apbs[i].RamIO)
805                                 continue;
806
807                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
808                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
809                         boardname[serial] = 0;
810
811                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
812                                i+1,
813                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
814                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
815                                boardname);
816
817
818                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
819                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
820                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
821
822                         if (serial != 0)
823                                 printk(" S/N %d\n", serial);
824                         else
825                                 printk("\n");
826                 }
827                 if (DeviceErrorCount != 0)
828                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
829                 if (ReadErrorCount != 0)
830                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
831                 if (WriteErrorCount != 0)
832                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
833                 if (waitqueue_active(&FlagSleepRec))
834                         printk(KERN_INFO "Process in read pending\n");
835                 for (i = 0; i < MAX_BOARD; i++) {
836                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
837                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
838                 }
839                 break;
840         default:
841                 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
842                 ret = -EINVAL;
843                 break;
844         }
845         Dummy = readb(apbs[IndexCard].RamIO + VERS);
846         kfree(adgl);
847         return 0;
848 }
849