Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/char/applicom.c

  1 /* Derived from Applicom driver ac.c for SCO Unix                            */
  2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
  3 /* dwmw2@infradead.org 30/8/98                                               */
  4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $                          */
  5 /* This module is for Linux 2.1 and 2.2 series kernels.                      */
  6 /*****************************************************************************/
  7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt  */
  8 /* ceci pour reseter correctement apres une sortie sauvage                   */
  9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption,     */
 10 /* LoopCount n'etait pas initialise a 0.                                     */
 11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte   */
 12 /*           pour liberer le bus                                             */
 13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
 14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter  */
 15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3    */
 16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes       */
 17 /* addresses de base des cartes, IOCTL 6 plus complet                         */
 18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification  */
 19 /* de code autre que le texte V2.6.1 en V2.8.0                               */
 20 /*****************************************************************************/
 21 
 22 
 23 #include <linux/kernel.h>
 24 #include <linux/module.h>
 25 #include <linux/interrupt.h>
 26 #include <linux/sched.h>
 27 #include <linux/slab.h>
 28 #include <linux/errno.h>
 29 #include <linux/mutex.h>
 30 #include <linux/miscdevice.h>
 31 #include <linux/pci.h>
 32 #include <linux/wait.h>
 33 #include <linux/init.h>
 34 #include <linux/fs.h>
 35 
 36 #include <asm/io.h>
 37 #include <asm/uaccess.h>
 38 
 39 #include "applicom.h"
 40 
 41 
 42 /* NOTE: We use for loops with {write,read}b() instead of 
 43    memcpy_{from,to}io throughout this driver. This is because
 44    the board doesn't correctly handle word accesses - only
 45    bytes. 
 46 */
 47 
 48 
 49 #undef DEBUG
 50 
 51 #define MAX_BOARD 8             /* maximum of pc board possible */
 52 #define MAX_ISA_BOARD 4
 53 #define LEN_RAM_IO 0x800
 54 #define AC_MINOR 157
 55 
 56 #ifndef PCI_VENDOR_ID_APPLICOM
 57 #define PCI_VENDOR_ID_APPLICOM                0x1389
 58 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
 59 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
 60 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
 61 #endif
 62 
 63 static DEFINE_MUTEX(ac_mutex);
 64 static char *applicom_pci_devnames[] = {
 65         "PCI board",
 66         "PCI2000IBS / PCI2000CAN",
 67         "PCI2000PFB"
 68 };
 69 
 70 static struct pci_device_id applicom_pci_tbl[] = {
 71         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
 72         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
 73         { PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
 74         { 0 }
 75 };
 76 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
 77 
 78 MODULE_AUTHOR("David Woodhouse & Applicom International");
 79 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
 80 MODULE_LICENSE("GPL");
 81 MODULE_ALIAS_MISCDEV(AC_MINOR);
 82 
 83 MODULE_SUPPORTED_DEVICE("ac");
 84 
 85 
 86 static struct applicom_board {
 87         unsigned long PhysIO;
 88         void __iomem *RamIO;
 89         wait_queue_head_t FlagSleepSend;
 90         long irq;
 91         spinlock_t mutex;
 92 } apbs[MAX_BOARD];
 93 
 94 static unsigned int irq = 0;    /* interrupt number IRQ       */
 95 static unsigned long mem = 0;   /* physical segment of board  */
 96 
 97 module_param(irq, uint, 0);
 98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
 99 module_param(mem, ulong, 0);
100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
101 
102 static unsigned int numboards;  /* number of installed boards */
103 static volatile unsigned char Dummy;
104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
105 static unsigned int WriteErrorCount;    /* number of write error      */
106 static unsigned int ReadErrorCount;     /* number of read error       */
107 static unsigned int DeviceErrorCount;   /* number of device error     */
108 
109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
111 static long ac_ioctl(struct file *, unsigned int, unsigned long);
112 static irqreturn_t ac_interrupt(int, void *);
113 
114 static const struct file_operations ac_fops = {
115         .owner = THIS_MODULE,
116         .llseek = no_llseek,
117         .read = ac_read,
118         .write = ac_write,
119         .unlocked_ioctl = ac_ioctl,
120 };
121 
122 static struct miscdevice ac_miscdev = {
123         AC_MINOR,
124         "ac",
125         &ac_fops
126 };
127 
128 static int dummy;       /* dev_id for request_irq() */
129 
130 static int ac_register_board(unsigned long physloc, void __iomem *loc, 
131                       unsigned char boardno)
132 {
133         volatile unsigned char byte_reset_it;
134 
135         if((readb(loc + CONF_END_TEST)     != 0x00) ||
136            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
137            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
138            (readb(loc + CONF_END_TEST + 3) != 0xFF))
139                 return 0;
140 
141         if (!boardno)
142                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
143 
144         if (!boardno || boardno > MAX_BOARD) {
145                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
146                        boardno, physloc, MAX_BOARD);
147                 return 0;
148         }
149 
150         if (apbs[boardno - 1].RamIO) {
151                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 
152                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
153                 return 0;
154         }
155 
156         boardno--;
157 
158         apbs[boardno].PhysIO = physloc;
159         apbs[boardno].RamIO = loc;
160         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
161         spin_lock_init(&apbs[boardno].mutex);
162         byte_reset_it = readb(loc + RAM_IT_TO_PC);
163 
164         numboards++;
165         return boardno + 1;
166 }
167 
168 static void __exit applicom_exit(void)
169 {
170         unsigned int i;
171 
172         misc_deregister(&ac_miscdev);
173 
174         for (i = 0; i < MAX_BOARD; i++) {
175 
176                 if (!apbs[i].RamIO)
177                         continue;
178 
179                 if (apbs[i].irq)
180                         free_irq(apbs[i].irq, &dummy);
181 
182                 iounmap(apbs[i].RamIO);
183         }
184 }
185 
186 static int __init applicom_init(void)
187 {
188         int i, numisa = 0;
189         struct pci_dev *dev = NULL;
190         void __iomem *RamIO;
191         int boardno, ret;
192 
193         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
194 
195         /* No mem and irq given - check for a PCI card */
196 
197         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
198 
199                 if (!pci_match_id(applicom_pci_tbl, dev))
200                         continue;
201                 
202                 if (pci_enable_device(dev))
203                         return -EIO;
204 
205                 RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
206 
207                 if (!RamIO) {
208                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
209                                 "space at 0x%llx\n",
210                                 (unsigned long long)pci_resource_start(dev, 0));
211                         pci_disable_device(dev);
212                         return -EIO;
213                 }
214 
215                 printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
216                        applicom_pci_devnames[dev->device-1],
217                            (unsigned long long)pci_resource_start(dev, 0),
218                        dev->irq);
219 
220                 boardno = ac_register_board(pci_resource_start(dev, 0),
221                                 RamIO, 0);
222                 if (!boardno) {
223                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
224                         iounmap(RamIO);
225                         pci_disable_device(dev);
226                         continue;
227                 }
228 
229                 if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
230                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
231                         iounmap(RamIO);
232                         pci_disable_device(dev);
233                         apbs[boardno - 1].RamIO = NULL;
234                         continue;
235                 }
236 
237                 /* Enable interrupts. */
238 
239                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
240 
241                 apbs[boardno - 1].irq = dev->irq;
242         }
243 
244         /* Finished with PCI cards. If none registered, 
245          * and there was no mem/irq specified, exit */
246 
247         if (!mem || !irq) {
248                 if (numboards)
249                         goto fin;
250                 else {
251                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
252                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
253                         return -ENXIO;
254                 }
255         }
256 
257         /* Now try the specified ISA cards */
258 
259         for (i = 0; i < MAX_ISA_BOARD; i++) {
260                 RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
261 
262                 if (!RamIO) {
263                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
264                         continue;
265                 }
266 
267                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
268                                                   RamIO,i+1))) {
269                         iounmap(RamIO);
270                         continue;
271                 }
272 
273                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
274 
275                 if (!numisa) {
276                         if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
277                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
278                                 iounmap(RamIO);
279                                 apbs[boardno - 1].RamIO = NULL;
280                         }
281                         else
282                                 apbs[boardno - 1].irq = irq;
283                 }
284                 else
285                         apbs[boardno - 1].irq = 0;
286 
287                 numisa++;
288         }
289 
290         if (!numisa)
291                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
292                                 "at mem 0x%lx\n", mem);
293 
294  fin:
295         init_waitqueue_head(&FlagSleepRec);
296 
297         WriteErrorCount = 0;
298         ReadErrorCount = 0;
299         DeviceErrorCount = 0;
300 
301         if (numboards) {
302                 ret = misc_register(&ac_miscdev);
303                 if (ret) {
304                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
305                         goto out;
306                 }
307                 for (i = 0; i < MAX_BOARD; i++) {
308                         int serial;
309                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
310 
311                         if (!apbs[i].RamIO)
312                                 continue;
313 
314                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
315                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
316 
317                         boardname[serial] = 0;
318 
319 
320                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
321                                i+1, boardname,
322                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
323                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
324                         
325                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
326                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
327                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
328 
329                         if (serial != 0)
330                                 printk(" S/N %d\n", serial);
331                         else
332                                 printk("\n");
333                 }
334                 return 0;
335         }
336 
337         else
338                 return -ENXIO;
339 
340 out:
341         for (i = 0; i < MAX_BOARD; i++) {
342                 if (!apbs[i].RamIO)
343                         continue;
344                 if (apbs[i].irq)
345                         free_irq(apbs[i].irq, &dummy);
346                 iounmap(apbs[i].RamIO);
347         }
348         return ret;
349 }
350 
351 module_init(applicom_init);
352 module_exit(applicom_exit);
353 
354 
355 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
356 {
357         unsigned int NumCard;   /* Board number 1 -> 8           */
358         unsigned int IndexCard; /* Index board number 0 -> 7     */
359         unsigned char TicCard;  /* Board TIC to send             */
360         unsigned long flags;    /* Current priority              */
361         struct st_ram_io st_loc;
362         struct mailbox tmpmailbox;
363 #ifdef DEBUG
364         int c;
365 #endif
366         DECLARE_WAITQUEUE(wait, current);
367 
368         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
369                 static int warncount = 5;
370                 if (warncount) {
371                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
372                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
373                         warncount--;
374                 }
375                 return -EINVAL;
376         }
377 
378         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
379                 return -EFAULT;
380         
381         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
382                           sizeof(struct mailbox))) 
383                 return -EFAULT;
384 
385         NumCard = st_loc.num_card;      /* board number to send          */
386         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
387         IndexCard = NumCard - 1;
388 
389         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
390                 return -EINVAL;
391 
392 #ifdef DEBUG
393         printk("Write to applicom card #%d. struct st_ram_io follows:",
394                IndexCard+1);
395 
396                 for (c = 0; c < sizeof(struct st_ram_io);) {
397                 
398                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
399 
400                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
401                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
402                         }
403                 }
404 
405                 printk("\nstruct mailbox follows:");
406 
407                 for (c = 0; c < sizeof(struct mailbox);) {
408                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
409 
410                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
411                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
412                         }
413                 }
414 
415                 printk("\n");
416 #endif
417 
418         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
419 
420         /* Test octet ready correct */
421         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
422                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
423                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
424                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
425                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
426                 DeviceErrorCount++;
427                 return -EIO;
428         }
429         
430         /* Place ourselves on the wait queue */
431         set_current_state(TASK_INTERRUPTIBLE);
432         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
433 
434         /* Check whether the card is ready for us */
435         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
436                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
437                 /* It's busy. Sleep. */
438 
439                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
440                 schedule();
441                 if (signal_pending(current)) {
442                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
443                                           &wait);
444                         return -EINTR;
445                 }
446                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
447                 set_current_state(TASK_INTERRUPTIBLE);
448         }
449 
450         /* We may not have actually slept */
451         set_current_state(TASK_RUNNING);
452         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
453 
454         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
455 
456         /* Which is best - lock down the pages with rawio and then
457            copy directly, or use bounce buffers? For now we do the latter 
458            because it works with 2.2 still */
459         {
460                 unsigned char *from = (unsigned char *) &tmpmailbox;
461                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
462                 int c;
463 
464                 for (c = 0; c < sizeof(struct mailbox); c++)
465                         writeb(*(from++), to++);
466         }
467 
468         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
469         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
470         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
471         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
472         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
473         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
474         Dummy = readb(apbs[IndexCard].RamIO + VERS);
475         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
476         return 0;
477 }
478 
479 static int do_ac_read(int IndexCard, char __user *buf,
480                 struct st_ram_io *st_loc, struct mailbox *mailbox)
481 {
482         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
483         unsigned char *to = (unsigned char *)mailbox;
484 #ifdef DEBUG
485         int c;
486 #endif
487 
488         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
489         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
490 
491 
492         {
493                 int c;
494 
495                 for (c = 0; c < sizeof(struct mailbox); c++)
496                         *(to++) = readb(from++);
497         }
498         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
499         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
500         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
501         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
502                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
503         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
504         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
505         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
506         Dummy = readb(apbs[IndexCard].RamIO + VERS);
507 
508 #ifdef DEBUG
509                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
510 
511                 for (c = 0; c < sizeof(struct st_ram_io);) {
512                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
513 
514                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
515                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
516                         }
517                 }
518 
519                 printk("\nstruct mailbox follows:");
520 
521                 for (c = 0; c < sizeof(struct mailbox);) {
522                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
523 
524                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
525                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
526                         }
527                 }
528                 printk("\n");
529 #endif
530         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
531 }
532 
533 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
534 {
535         unsigned long flags;
536         unsigned int i;
537         unsigned char tmp;
538         int ret = 0;
539         DECLARE_WAITQUEUE(wait, current);
540 #ifdef DEBUG
541         int loopcount=0;
542 #endif
543         /* No need to ratelimit this. Only root can trigger it anyway */
544         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
545                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
546                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
547                 return -EINVAL;
548         }
549         
550         while(1) {
551                 /* Stick ourself on the wait queue */
552                 set_current_state(TASK_INTERRUPTIBLE);
553                 add_wait_queue(&FlagSleepRec, &wait);
554                 
555                 /* Scan each board, looking for one which has a packet for us */
556                 for (i=0; i < MAX_BOARD; i++) {
557                         if (!apbs[i].RamIO)
558                                 continue;
559                         spin_lock_irqsave(&apbs[i].mutex, flags);
560                         
561                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
562                         
563                         if (tmp == 2) {
564                                 struct st_ram_io st_loc;
565                                 struct mailbox mailbox;
566 
567                                 /* Got a packet for us */
568                                 memset(&st_loc, 0, sizeof(st_loc));
569                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
570                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
571                                 set_current_state(TASK_RUNNING);
572                                 remove_wait_queue(&FlagSleepRec, &wait);
573 
574                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
575                                         return -EFAULT;
576                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
577                                         return -EFAULT;
578                                 return tmp;
579                         }
580                         
581                         if (tmp > 2) {
582                                 /* Got an error */
583                                 Dummy = readb(apbs[i].RamIO + VERS);
584                                 
585                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
586                                 set_current_state(TASK_RUNNING);
587                                 remove_wait_queue(&FlagSleepRec, &wait);
588                                 
589                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
590                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
591                                 DeviceErrorCount++;
592                                 return -EIO;
593                         }
594                         
595                         /* Nothing for us. Try the next board */
596                         Dummy = readb(apbs[i].RamIO + VERS);
597                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
598                         
599                 } /* per board */
600 
601                 /* OK - No boards had data for us. Sleep now */
602 
603                 schedule();
604                 remove_wait_queue(&FlagSleepRec, &wait);
605 
606                 if (signal_pending(current))
607                         return -EINTR;
608 
609 #ifdef DEBUG
610                 if (loopcount++ > 2) {
611                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
612                 }
613 #endif
614         } 
615 }
616 
617 static irqreturn_t ac_interrupt(int vec, void *dev_instance)
618 {
619         unsigned int i;
620         unsigned int FlagInt;
621         unsigned int LoopCount;
622         int handled = 0;
623 
624         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
625 
626         LoopCount = 0;
627 
628         do {
629                 FlagInt = 0;
630                 for (i = 0; i < MAX_BOARD; i++) {
631                         
632                         /* Skip if this board doesn't exist */
633                         if (!apbs[i].RamIO)
634                                 continue;
635 
636                         spin_lock(&apbs[i].mutex);
637 
638                         /* Skip if this board doesn't want attention */
639                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
640                                 spin_unlock(&apbs[i].mutex);
641                                 continue;
642                         }
643 
644                         handled = 1;
645                         FlagInt = 1;
646                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
647 
648                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
649                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
650                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
651                                 DeviceErrorCount++;
652                         }
653 
654                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
655                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
656                                 
657                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
658                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
659                                 DeviceErrorCount++;
660                         }
661 
662                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
663                                 if (waitqueue_active(&FlagSleepRec)) {
664                                 wake_up_interruptible(&FlagSleepRec);
665                         }
666                         }
667 
668                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
669                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
670                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
671                                 }
672                         }
673                         Dummy = readb(apbs[i].RamIO + VERS);
674 
675                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
676                                 /* There's another int waiting on this card */
677                                 spin_unlock(&apbs[i].mutex);
678                                 i--;
679                         } else {
680                                 spin_unlock(&apbs[i].mutex);
681                         }
682                 }
683                 if (FlagInt)
684                         LoopCount = 0;
685                 else
686                         LoopCount++;
687         } while(LoopCount < 2);
688         return IRQ_RETVAL(handled);
689 }
690 
691 
692 
693 static long ac_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
694      
695 {                               /* @ ADG ou ATO selon le cas */
696         int i;
697         unsigned char IndexCard;
698         void __iomem *pmem;
699         int ret = 0;
700         volatile unsigned char byte_reset_it;
701         struct st_ram_io *adgl;
702         void __user *argp = (void __user *)arg;
703 
704         /* In general, the device is only openable by root anyway, so we're not
705            particularly concerned that bogus ioctls can flood the console. */
706 
707         adgl = memdup_user(argp, sizeof(struct st_ram_io));
708         if (IS_ERR(adgl))
709                 return PTR_ERR(adgl);
710 
711         mutex_lock(&ac_mutex);  
712         IndexCard = adgl->num_card-1;
713          
714         if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
715                 static int warncount = 10;
716                 if (warncount) {
717                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
718                         warncount--;
719                 }
720                 kfree(adgl);
721                 mutex_unlock(&ac_mutex);
722                 return -EINVAL;
723         }
724 
725         switch (cmd) {
726                 
727         case 0:
728                 pmem = apbs[IndexCard].RamIO;
729                 for (i = 0; i < sizeof(struct st_ram_io); i++)
730                         ((unsigned char *)adgl)[i]=readb(pmem++);
731                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
732                         ret = -EFAULT;
733                 break;
734         case 1:
735                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
736                 for (i = 0; i < 4; i++)
737                         adgl->conf_end_test[i] = readb(pmem++);
738                 for (i = 0; i < 2; i++)
739                         adgl->error_code[i] = readb(pmem++);
740                 for (i = 0; i < 4; i++)
741                         adgl->parameter_error[i] = readb(pmem++);
742                 pmem = apbs[IndexCard].RamIO + VERS;
743                 adgl->vers = readb(pmem);
744                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
745                 for (i = 0; i < 20; i++)
746                         adgl->reserv1[i] = readb(pmem++);
747                 *(int *)&adgl->reserv1[20] =  
748                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 
749                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 
750                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
751 
752                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
753                         ret = -EFAULT;
754                 break;
755         case 2:
756                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
757                 for (i = 0; i < 10; i++)
758                         writeb(0xff, pmem++);
759                 writeb(adgl->data_from_pc_ready, 
760                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
761 
762                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
763                 
764                 for (i = 0; i < MAX_BOARD; i++) {
765                         if (apbs[i].RamIO) {
766                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
767                         }
768                 }
769                 break;
770         case 3:
771                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
772                 writeb(adgl->tic_des_from_pc, pmem);
773                 break;
774         case 4:
775                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
776                 adgl->tic_owner_to_pc     = readb(pmem++);
777                 adgl->numcard_owner_to_pc = readb(pmem);
778                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
779                         ret = -EFAULT;
780                 break;
781         case 5:
782                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
783                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
784                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
785                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
786                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
787                 break;
788         case 6:
789                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
790                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
791                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
792                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
793                 for (i = 0; i < MAX_BOARD; i++) {
794                         int serial;
795                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
796 
797                         if (!apbs[i].RamIO)
798                                 continue;
799 
800                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
801                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
802                         boardname[serial] = 0;
803 
804                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
805                                i+1,
806                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
807                                (int)(readb(apbs[i].RamIO + VERS) & 0xF),
808                                boardname);
809 
810 
811                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
812                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
813                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
814 
815                         if (serial != 0)
816                                 printk(" S/N %d\n", serial);
817                         else
818                                 printk("\n");
819                 }
820                 if (DeviceErrorCount != 0)
821                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
822                 if (ReadErrorCount != 0)
823                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
824                 if (WriteErrorCount != 0)
825                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
826                 if (waitqueue_active(&FlagSleepRec))
827                         printk(KERN_INFO "Process in read pending\n");
828                 for (i = 0; i < MAX_BOARD; i++) {
829                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
830                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
831                 }
832                 break;
833         default:
834                 ret = -ENOTTY;
835                 break;
836         }
837         Dummy = readb(apbs[IndexCard].RamIO + VERS);
838         kfree(adgl);
839         mutex_unlock(&ac_mutex);
840         return 0;
841 }
842 
843 

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