Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge
[linux-2.6] / drivers / char / applicom.c
1 /* Derived from Applicom driver ac.c for SCO Unix                            */
2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd.                         */
3 /* dwmw2@infradead.org 30/8/98                                               */
4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $                          */
5 /* This module is for Linux 2.1 and 2.2 series kernels.                      */
6 /*****************************************************************************/
7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt  */
8 /* ceci pour reseter correctement apres une sortie sauvage                   */
9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption,     */
10 /* LoopCount n'etait pas initialise a 0.                                     */
11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte   */
12 /*           pour liberer le bus                                             */
13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter  */
15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3    */
16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes       */
17 /* adresses de base des cartes, IOCTL 6 plus complet                         */
18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification  */
19 /* de code autre que le texte V2.6.1 en V2.8.0                               */
20 /*****************************************************************************/
21
22
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/interrupt.h>
26 #include <linux/slab.h>
27 #include <linux/errno.h>
28 #include <linux/miscdevice.h>
29 #include <linux/pci.h>
30 #include <linux/wait.h>
31 #include <linux/init.h>
32 #include <linux/fs.h>
33
34 #include <asm/io.h>
35 #include <asm/uaccess.h>
36
37 #include "applicom.h"
38
39
40 /* NOTE: We use for loops with {write,read}b() instead of 
41    memcpy_{from,to}io throughout this driver. This is because
42    the board doesn't correctly handle word accesses - only
43    bytes. 
44 */
45
46
47 #undef DEBUG
48
49 #define MAX_BOARD 8             /* maximum of pc board possible */
50 #define MAX_ISA_BOARD 4
51 #define LEN_RAM_IO 0x800
52 #define AC_MINOR 157
53
54 #ifndef PCI_VENDOR_ID_APPLICOM
55 #define PCI_VENDOR_ID_APPLICOM                0x1389
56 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC     0x0001
57 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
58 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB     0x0003
59 #endif
60 #define MAX_PCI_DEVICE_NUM 3
61
62 static char *applicom_pci_devnames[] = {
63         "PCI board",
64         "PCI2000IBS / PCI2000CAN",
65         "PCI2000PFB"
66 };
67
68 static struct pci_device_id applicom_pci_tbl[] = {
69         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC,
70           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
71         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN,
72           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
73         { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB,
74           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
75         { 0 }
76 };
77 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
78
79 MODULE_AUTHOR("David Woodhouse & Applicom International");
80 MODULE_DESCRIPTION("Driver for Applicom Profibus card");
81 MODULE_LICENSE("GPL");
82
83 MODULE_SUPPORTED_DEVICE("ac");
84
85
86 static struct applicom_board {
87         unsigned long PhysIO;
88         void __iomem *RamIO;
89         wait_queue_head_t FlagSleepSend;
90         long irq;
91         spinlock_t mutex;
92 } apbs[MAX_BOARD];
93
94 static unsigned int irq = 0;    /* interrupt number IRQ       */
95 static unsigned long mem = 0;   /* physical segment of board  */
96
97 module_param(irq, uint, 0);
98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
99 module_param(mem, ulong, 0);
100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
101
102 static unsigned int numboards;  /* number of installed boards */
103 static volatile unsigned char Dummy;
104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
105 static unsigned int WriteErrorCount;    /* number of write error      */
106 static unsigned int ReadErrorCount;     /* number of read error       */
107 static unsigned int DeviceErrorCount;   /* number of device error     */
108
109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
111 static int ac_ioctl(struct inode *, struct file *, unsigned int,
112                     unsigned long);
113 static irqreturn_t ac_interrupt(int, void *, struct pt_regs *);
114
115 static struct file_operations ac_fops = {
116         .owner = THIS_MODULE,
117         .llseek = no_llseek,
118         .read = ac_read,
119         .write = ac_write,
120         .ioctl = ac_ioctl,
121 };
122
123 static struct miscdevice ac_miscdev = {
124         AC_MINOR,
125         "ac",
126         &ac_fops
127 };
128
129 static int dummy;       /* dev_id for request_irq() */
130
131 static int ac_register_board(unsigned long physloc, void __iomem *loc, 
132                       unsigned char boardno)
133 {
134         volatile unsigned char byte_reset_it;
135
136         if((readb(loc + CONF_END_TEST)     != 0x00) ||
137            (readb(loc + CONF_END_TEST + 1) != 0x55) ||
138            (readb(loc + CONF_END_TEST + 2) != 0xAA) ||
139            (readb(loc + CONF_END_TEST + 3) != 0xFF))
140                 return 0;
141
142         if (!boardno)
143                 boardno = readb(loc + NUMCARD_OWNER_TO_PC);
144
145         if (!boardno || boardno > MAX_BOARD) {
146                 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
147                        boardno, physloc, MAX_BOARD);
148                 return 0;
149         }
150
151         if (apbs[boardno - 1].RamIO) {
152                 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 
153                        boardno, physloc, boardno, apbs[boardno-1].PhysIO);
154                 return 0;
155         }
156
157         boardno--;
158
159         apbs[boardno].PhysIO = physloc;
160         apbs[boardno].RamIO = loc;
161         init_waitqueue_head(&apbs[boardno].FlagSleepSend);
162         spin_lock_init(&apbs[boardno].mutex);
163         byte_reset_it = readb(loc + RAM_IT_TO_PC);
164
165         numboards++;
166         return boardno + 1;
167 }
168
169 #ifdef MODULE
170
171 #define applicom_init init_module
172
173 void cleanup_module(void)
174 {
175         unsigned int i;
176
177         misc_deregister(&ac_miscdev);
178
179         for (i = 0; i < MAX_BOARD; i++) {
180
181                 if (!apbs[i].RamIO)
182                         continue;
183
184                 if (apbs[i].irq)
185                         free_irq(apbs[i].irq, &dummy);
186
187                 iounmap(apbs[i].RamIO);
188         }
189 }
190
191 #endif                          /* MODULE */
192
193 int __init applicom_init(void)
194 {
195         int i, numisa = 0;
196         struct pci_dev *dev = NULL;
197         void __iomem *RamIO;
198         int boardno, ret;
199
200         printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
201
202         /* No mem and irq given - check for a PCI card */
203
204         while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
205
206                 if (dev->vendor != PCI_VENDOR_ID_APPLICOM)
207                         continue;
208                 
209                 if (dev->device  > MAX_PCI_DEVICE_NUM || dev->device == 0)
210                         continue;
211                 
212                 if (pci_enable_device(dev))
213                         return -EIO;
214
215                 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO);
216
217                 if (!RamIO) {
218                         printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start);
219                         pci_disable_device(dev);
220                         return -EIO;
221                 }
222
223                 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n",
224                        applicom_pci_devnames[dev->device-1], dev->resource[0].start, 
225                        dev->irq);
226
227                 boardno = ac_register_board(dev->resource[0].start, RamIO,0);
228                 if (!boardno) {
229                         printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
230                         iounmap(RamIO);
231                         pci_disable_device(dev);
232                         continue;
233                 }
234
235                 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) {
236                         printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
237                         iounmap(RamIO);
238                         pci_disable_device(dev);
239                         apbs[boardno - 1].RamIO = NULL;
240                         continue;
241                 }
242
243                 /* Enable interrupts. */
244
245                 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
246
247                 apbs[boardno - 1].irq = dev->irq;
248         }
249
250         /* Finished with PCI cards. If none registered, 
251          * and there was no mem/irq specified, exit */
252
253         if (!mem || !irq) {
254                 if (numboards)
255                         goto fin;
256                 else {
257                         printk(KERN_INFO "ac.o: No PCI boards found.\n");
258                         printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
259                         return -ENXIO;
260                 }
261         }
262
263         /* Now try the specified ISA cards */
264
265         for (i = 0; i < MAX_ISA_BOARD; i++) {
266                 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
267
268                 if (!RamIO) {
269                         printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
270                         continue;
271                 }
272
273                 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
274                                                   RamIO,i+1))) {
275                         iounmap(RamIO);
276                         continue;
277                 }
278
279                 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
280
281                 if (!numisa) {
282                         if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) {
283                                 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
284                                 iounmap(RamIO);
285                                 apbs[boardno - 1].RamIO = NULL;
286                         }
287                         else
288                                 apbs[boardno - 1].irq = irq;
289                 }
290                 else
291                         apbs[boardno - 1].irq = 0;
292
293                 numisa++;
294         }
295
296         if (!numisa)
297                 printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
298                                 "at mem 0x%lx\n", mem);
299
300  fin:
301         init_waitqueue_head(&FlagSleepRec);
302
303         WriteErrorCount = 0;
304         ReadErrorCount = 0;
305         DeviceErrorCount = 0;
306
307         if (numboards) {
308                 ret = misc_register(&ac_miscdev);
309                 if (ret) {
310                         printk(KERN_WARNING "ac.o: Unable to register misc device\n");
311                         goto out;
312                 }
313                 for (i = 0; i < MAX_BOARD; i++) {
314                         int serial;
315                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
316
317                         if (!apbs[i].RamIO)
318                                 continue;
319
320                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
321                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
322
323                         boardname[serial] = 0;
324
325
326                         printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
327                                i+1, boardname,
328                                (int)(readb(apbs[i].RamIO + VERS) >> 4),
329                                (int)(readb(apbs[i].RamIO + VERS) & 0xF));
330                         
331                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
332                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
333                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
334
335                         if (serial != 0)
336                                 printk(" S/N %d\n", serial);
337                         else
338                                 printk("\n");
339                 }
340                 return 0;
341         }
342
343         else
344                 return -ENXIO;
345
346 out:
347         for (i = 0; i < MAX_BOARD; i++) {
348                 if (!apbs[i].RamIO)
349                         continue;
350                 if (apbs[i].irq)
351                         free_irq(apbs[i].irq, &dummy);
352                 iounmap(apbs[i].RamIO);
353         }
354         pci_disable_device(dev);
355         return ret;
356 }
357
358
359 #ifndef MODULE
360 __initcall(applicom_init);
361 #endif
362
363 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
364 {
365         unsigned int NumCard;   /* Board number 1 -> 8           */
366         unsigned int IndexCard; /* Index board number 0 -> 7     */
367         unsigned char TicCard;  /* Board TIC to send             */
368         unsigned long flags;    /* Current priority              */
369         struct st_ram_io st_loc;
370         struct mailbox tmpmailbox;
371 #ifdef DEBUG
372         int c;
373 #endif
374         DECLARE_WAITQUEUE(wait, current);
375
376         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
377                 static int warncount = 5;
378                 if (warncount) {
379                         printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
380                                count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
381                         warncount--;
382                 }
383                 return -EINVAL;
384         }
385
386         if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 
387                 return -EFAULT;
388         
389         if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
390                           sizeof(struct mailbox))) 
391                 return -EFAULT;
392
393         NumCard = st_loc.num_card;      /* board number to send          */
394         TicCard = st_loc.tic_des_from_pc;       /* tic number to send            */
395         IndexCard = NumCard - 1;
396
397         if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
398                 return -EINVAL;
399
400 #ifdef DEBUG
401         printk("Write to applicom card #%d. struct st_ram_io follows:",
402                IndexCard+1);
403
404                 for (c = 0; c < sizeof(struct st_ram_io);) {
405                 
406                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
407
408                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
409                                 printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
410                         }
411                 }
412
413                 printk("\nstruct mailbox follows:");
414
415                 for (c = 0; c < sizeof(struct mailbox);) {
416                         printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
417
418                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
419                                 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
420                         }
421                 }
422
423                 printk("\n");
424 #endif
425
426         spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
427
428         /* Test octet ready correct */
429         if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 
430                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
431                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
432                 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
433                        IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
434                 DeviceErrorCount++;
435                 return -EIO;
436         }
437         
438         /* Place ourselves on the wait queue */
439         set_current_state(TASK_INTERRUPTIBLE);
440         add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
441
442         /* Check whether the card is ready for us */
443         while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
444                 Dummy = readb(apbs[IndexCard].RamIO + VERS);
445                 /* It's busy. Sleep. */
446
447                 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
448                 schedule();
449                 if (signal_pending(current)) {
450                         remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
451                                           &wait);
452                         return -EINTR;
453                 }
454                 spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
455                 set_current_state(TASK_INTERRUPTIBLE);
456         }
457
458         /* We may not have actually slept */
459         set_current_state(TASK_RUNNING);
460         remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
461
462         writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
463
464         /* Which is best - lock down the pages with rawio and then
465            copy directly, or use bounce buffers? For now we do the latter 
466            because it works with 2.2 still */
467         {
468                 unsigned char *from = (unsigned char *) &tmpmailbox;
469                 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
470                 int c;
471
472                 for (c = 0; c < sizeof(struct mailbox); c++)
473                         writeb(*(from++), to++);
474         }
475
476         writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
477         writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
478         writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
479         writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
480         writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
481         writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
482         Dummy = readb(apbs[IndexCard].RamIO + VERS);
483         spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
484         return 0;
485 }
486
487 static int do_ac_read(int IndexCard, char __user *buf,
488                 struct st_ram_io *st_loc, struct mailbox *mailbox)
489 {
490         void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
491         unsigned char *to = (unsigned char *)&mailbox;
492 #ifdef DEBUG
493         int c;
494 #endif
495
496         st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
497         st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
498
499
500         {
501                 int c;
502
503                 for (c = 0; c < sizeof(struct mailbox); c++)
504                         *(to++) = readb(from++);
505         }
506         writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
507         writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
508         writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
509         writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 
510                apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
511         writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
512         writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
513         writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
514         Dummy = readb(apbs[IndexCard].RamIO + VERS);
515
516 #ifdef DEBUG
517                 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
518
519                 for (c = 0; c < sizeof(struct st_ram_io);) {
520                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
521
522                         for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
523                                 printk(" %2.2X", ((unsigned char *)st_loc)[c]);
524                         }
525                 }
526
527                 printk("\nstruct mailbox follows:");
528
529                 for (c = 0; c < sizeof(struct mailbox);) {
530                         printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
531
532                         for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
533                                 printk(" %2.2X", ((unsigned char *)mailbox)[c]);
534                         }
535                 }
536                 printk("\n");
537 #endif
538         return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
539 }
540
541 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
542 {
543         unsigned long flags;
544         unsigned int i;
545         unsigned char tmp;
546         int ret = 0;
547         DECLARE_WAITQUEUE(wait, current);
548 #ifdef DEBUG
549         int loopcount=0;
550 #endif
551         /* No need to ratelimit this. Only root can trigger it anyway */
552         if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
553                 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
554                         count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
555                 return -EINVAL;
556         }
557         
558         while(1) {
559                 /* Stick ourself on the wait queue */
560                 set_current_state(TASK_INTERRUPTIBLE);
561                 add_wait_queue(&FlagSleepRec, &wait);
562                 
563                 /* Scan each board, looking for one which has a packet for us */
564                 for (i=0; i < MAX_BOARD; i++) {
565                         if (!apbs[i].RamIO)
566                                 continue;
567                         spin_lock_irqsave(&apbs[i].mutex, flags);
568                         
569                         tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
570                         
571                         if (tmp == 2) {
572                                 struct st_ram_io st_loc;
573                                 struct mailbox mailbox;
574
575                                 /* Got a packet for us */
576                                 ret = do_ac_read(i, buf, &st_loc, &mailbox);
577                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
578                                 set_current_state(TASK_RUNNING);
579                                 remove_wait_queue(&FlagSleepRec, &wait);
580
581                                 if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
582                                         return -EFAULT;
583                                 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
584                                         return -EFAULT;
585                                 return tmp;
586                         }
587                         
588                         if (tmp > 2) {
589                                 /* Got an error */
590                                 Dummy = readb(apbs[i].RamIO + VERS);
591                                 
592                                 spin_unlock_irqrestore(&apbs[i].mutex, flags);
593                                 set_current_state(TASK_RUNNING);
594                                 remove_wait_queue(&FlagSleepRec, &wait);
595                                 
596                                 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
597                                        i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
598                                 DeviceErrorCount++;
599                                 return -EIO;
600                         }
601                         
602                         /* Nothing for us. Try the next board */
603                         Dummy = readb(apbs[i].RamIO + VERS);
604                         spin_unlock_irqrestore(&apbs[i].mutex, flags);
605                         
606                 } /* per board */
607
608                 /* OK - No boards had data for us. Sleep now */
609
610                 schedule();
611                 remove_wait_queue(&FlagSleepRec, &wait);
612
613                 if (signal_pending(current))
614                         return -EINTR;
615
616 #ifdef DEBUG
617                 if (loopcount++ > 2) {
618                         printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
619                 }
620 #endif
621         } 
622 }
623
624 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs)
625 {
626         unsigned int i;
627         unsigned int FlagInt;
628         unsigned int LoopCount;
629         int handled = 0;
630
631         //    printk("Applicom interrupt on IRQ %d occurred\n", vec);
632
633         LoopCount = 0;
634
635         do {
636                 FlagInt = 0;
637                 for (i = 0; i < MAX_BOARD; i++) {
638                         
639                         /* Skip if this board doesn't exist */
640                         if (!apbs[i].RamIO)
641                                 continue;
642
643                         spin_lock(&apbs[i].mutex);
644
645                         /* Skip if this board doesn't want attention */
646                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
647                                 spin_unlock(&apbs[i].mutex);
648                                 continue;
649                         }
650
651                         handled = 1;
652                         FlagInt = 1;
653                         writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
654
655                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
656                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
657                                        i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
658                                 DeviceErrorCount++;
659                         }
660
661                         if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 
662                            (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
663                                 
664                                 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
665                                        i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
666                                 DeviceErrorCount++;
667                         }
668
669                         if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) {     /* mailbox sent by the card ?   */
670                                 if (waitqueue_active(&FlagSleepRec)) {
671                                 wake_up_interruptible(&FlagSleepRec);
672                         }
673                         }
674
675                         if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) {   /* ram i/o free for write by pc ? */
676                                 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ?    */
677                                         wake_up_interruptible(&apbs[i].FlagSleepSend);
678                                 }
679                         }
680                         Dummy = readb(apbs[i].RamIO + VERS);
681
682                         if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
683                                 /* There's another int waiting on this card */
684                                 spin_unlock(&apbs[i].mutex);
685                                 i--;
686                         } else {
687                                 spin_unlock(&apbs[i].mutex);
688                         }
689                 }
690                 if (FlagInt)
691                         LoopCount = 0;
692                 else
693                         LoopCount++;
694         } while(LoopCount < 2);
695         return IRQ_RETVAL(handled);
696 }
697
698
699
700 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
701      
702 {                               /* @ ADG ou ATO selon le cas */
703         int i;
704         unsigned char IndexCard;
705         void __iomem *pmem;
706         int ret = 0;
707         volatile unsigned char byte_reset_it;
708         struct st_ram_io *adgl;
709         void __user *argp = (void __user *)arg;
710
711         /* In general, the device is only openable by root anyway, so we're not
712            particularly concerned that bogus ioctls can flood the console. */
713
714         adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
715         if (!adgl)
716                 return -ENOMEM;
717
718         if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
719                 kfree(adgl);
720                 return -EFAULT;
721         }
722         
723         IndexCard = adgl->num_card-1;
724          
725         if(cmd != 0 && cmd != 6 &&
726            ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
727                 static int warncount = 10;
728                 if (warncount) {
729                         printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
730                         warncount--;
731                 }
732                 kfree(adgl);
733                 return -EINVAL;
734         }
735
736         switch (cmd) {
737                 
738         case 0:
739                 pmem = apbs[IndexCard].RamIO;
740                 for (i = 0; i < sizeof(struct st_ram_io); i++)
741                         ((unsigned char *)adgl)[i]=readb(pmem++);
742                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
743                         ret = -EFAULT;
744                 break;
745         case 1:
746                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
747                 for (i = 0; i < 4; i++)
748                         adgl->conf_end_test[i] = readb(pmem++);
749                 for (i = 0; i < 2; i++)
750                         adgl->error_code[i] = readb(pmem++);
751                 for (i = 0; i < 4; i++)
752                         adgl->parameter_error[i] = readb(pmem++);
753                 pmem = apbs[IndexCard].RamIO + VERS;
754                 adgl->vers = readb(pmem);
755                 pmem = apbs[IndexCard].RamIO + TYPE_CARD;
756                 for (i = 0; i < 20; i++)
757                         adgl->reserv1[i] = readb(pmem++);
758                 *(int *)&adgl->reserv1[20] =  
759                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 
760                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 
761                         (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
762
763                 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
764                         ret = -EFAULT;
765                 break;
766         case 2:
767                 pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
768                 for (i = 0; i < 10; i++)
769                         writeb(0xff, pmem++);
770                 writeb(adgl->data_from_pc_ready, 
771                        apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
772
773                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
774                 
775                 for (i = 0; i < MAX_BOARD; i++) {
776                         if (apbs[i].RamIO) {
777                                 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
778                         }
779                 }
780                 break;
781         case 3:
782                 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
783                 writeb(adgl->tic_des_from_pc, pmem);
784                 break;
785         case 4:
786                 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
787                 adgl->tic_owner_to_pc     = readb(pmem++);
788                 adgl->numcard_owner_to_pc = readb(pmem);
789                 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
790                         ret = -EFAULT;
791                 break;
792         case 5:
793                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
794                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
795                 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
796                 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
797                 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
798                 break;
799         case 6:
800                 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
801                 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
802                 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
803                 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
804                 for (i = 0; i < MAX_BOARD; i++) {
805                         int serial;
806                         char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
807
808                         if (!apbs[i].RamIO)
809                                 continue;
810
811                         for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
812                                 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
813                         boardname[serial] = 0;
814
815                         printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
816                                i+1,
817                                (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
818                                (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
819                                boardname);
820
821
822                         serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 
823                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 
824                                 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
825
826                         if (serial != 0)
827                                 printk(" S/N %d\n", serial);
828                         else
829                                 printk("\n");
830                 }
831                 if (DeviceErrorCount != 0)
832                         printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
833                 if (ReadErrorCount != 0)
834                         printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
835                 if (WriteErrorCount != 0)
836                         printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
837                 if (waitqueue_active(&FlagSleepRec))
838                         printk(KERN_INFO "Process in read pending\n");
839                 for (i = 0; i < MAX_BOARD; i++) {
840                         if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
841                                 printk(KERN_INFO "Process in write pending board %d\n",i+1);
842                 }
843                 break;
844         default:
845                 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
846                 ret = -EINVAL;
847                 break;
848         }
849         Dummy = readb(apbs[IndexCard].RamIO + VERS);
850         kfree(adgl);
851         return 0;
852 }
853
854 #ifndef MODULE
855 static int __init applicom_setup(char *str)
856 {
857         int ints[4];
858
859         (void) get_options(str, 4, ints);
860
861         if (ints[0] > 2) {
862                 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n");
863         }
864
865         if (ints[0] < 2) {
866                 printk(KERN_INFO"applicom numargs: %d\n", ints[0]);
867                 return 0;
868         }
869
870         mem = ints[1];
871         irq = ints[2];
872         return 1;
873 }
874
875 __setup("applicom=", applicom_setup);
876
877 #endif                          /* MODULE */
878